Information
-
Patent Grant
-
6621056
-
Patent Number
6,621,056
-
Date Filed
Friday, November 9, 200123 years ago
-
Date Issued
Tuesday, September 16, 200321 years ago
-
Inventors
-
Original Assignees
-
Examiners
- Walberg; Teresa
- Fastovsky; L
Agents
-
CPC
-
US Classifications
Field of Search
US
- 219 532
- 219 536
- 219 537
- 219 546
- 219 539
- 219 525
- 392 379
- 392 385
- 028 611
- 338 316
-
International Classifications
-
Abstract
A heater assembly includes a housing structure, a support structure, an insulator structure, and a heating structure. The housing structure conveys heat to be produced within the housing structure from a first portion to a second portion of the housing structure. The support structure is releasably and fixedly secured to the housing structure. The insulator structure is affixed to the support structure to be releasably and fixedly secured to the housing structure. The heating structure is affixed to the insulator structure to be releasably and fixedly secured to the housing structure, and to be insulated from at least one of the housing structure and the support structure. The housing structure includes an outer surface having a non-uniform cross section with respect to an axis of the housing structure. The support structure, the insulator structure, and the heating structure are positioned within the housing structure.
Description
FIELD OF THE INVENTION
The present invention relates in general to heater assemblies. In particular, the present invention relates to heater assemblies with a non-uniform cross section.
BACKGROUND OF THE INVENTION
It is known to use open, electric heater coils in tubes or ducts having a uniform cross section with respect to an axis of the tubes or ducts. Examples of known shapes of these tubes or ducts are round, square, rectangular and elliptical.
It is also known to use open, electric heater coils in heater housings or ducts having a uniform cross section with respect to an axis of the heater housings or ducts. Examples of known shapes of these heater housings or ducts are round and rectangular. These heater housings or ducts are used, for example, in clothes dryers.
It is also known how to position these electric heater coils, having a uniform cross section, along the length of the heater housing or duct having a uniform cross section as well. In essence, a metal plate or wire frame is used to retain electrical insulating standoffs that support the electric heater coils such that a spacing is maintained between electrical and heat producing parts and the surrounding heater housing or duct. The electrical insulating standoffs are made of electrical grade ceramic, and the heater housing or duct is made of metal.
It is, however, not known to use heater housings or ducts having a non-uniform cross section with respect to an axis of the heater housings or ducts, for example, in clothes dryers. It is, also, not known to use open, electric heater coils in heater housings or ducts having a non-uniform cross section with respect to an axis of the heater housings or ducts.
SUMMARY
One embodiment of the present invention provides a heater assembly, including a housing structure, a support structure, an insulator structure, and a heating structure. The housing structure conveys heat to be produced within the housing structure from a first portion to a second portion of the housing structure. The support structure is releasably and fixedly secured to the housing structure. The insulator structure is affixed to the support structure to be releasably and fixedly secured to the housing structure. The heating structure is affixed to the insulator structure to be releasably and fixedly secured to the housing structure, and to be insulated from at least one of the housing structure and the support structure. The housing structure includes an outer surface having a non-uniform cross section with respect to an axis of the housing structure. The support structure, the insulator structure, and the heating structure are positioned within the housing structure.
BRIEF DESCRIPTION OF THE DRAWINGS
In the drawings, like reference numerals represent similar parts of the illustrated embodiments of the present invention throughout the several views and wherein:
FIG. 1
is a cross-sectional, side view of an embodiment of a heater assembly;
FIG. 2
is a cross-sectional, bottom view of the embodiment of
FIG. 1
;
FIG. 3
is a cross-sectional, end view of the embodiment of
FIG. 1
;
FIG. 4
is a top view of a housing structure in accordance with the embodiment of
FIG. 1
;
FIG. 5
is a side view of a support structure in accordance with the embodiment of
FIG. 1
;
FIGS. 6A and 6B
are a side view and a top view, respectively, of an insulator structure in accordance with the embodiment of
FIG. 1
;
FIGS. 7A
,
7
B and
7
C are a top view, a front view and a rear view, respectively, of a terminal block structure in accordance with the embodiment of
FIG. 1
;
FIG. 8
is a top view of a terminal structure in accordance with the embodiment of
FIG. 1
;
FIG. 9
is a cross-sectional, side view of another embodiment of a heater assembly;
FIG. 10
is a cross-sectional, bottom view of the embodiment of
FIG. 9
;
FIG. 11
is a cross-sectional, end view of the embodiment of
FIG. 9
;
FIG. 12
is a top view of a housing structure in accordance with the embodiment of
FIG. 9
;
FIGS. 13A and 13B
are a side view and a top view, respectively, of a support structure in accordance with the embodiment of
FIG. 9
; and
FIGS. 14A and 14B
are a front view and a side view, respectively, of the embodiment of
FIG. 1
or
9
, coupled to a dryer.
DETAILED DESCRIPTION
FIG. 1
illustrates a cross-sectional, side view of an embodiment of a heater assembly
100
. The heater assembly
100
may include a housing structure
105
, a support structure
110
, an insulator structure
115
, and a heating structure
120
.
FIG. 2
illustrates a cross-sectional, bottom view of the embodiment of
FIG. 1
, and
FIG. 3
illustrates a cross-sectional, end view of the embodiment of FIG.
1
.
FIG. 4
illustrates a top view of the housing structure
105
in accordance with the embodiment of FIG.
1
.
FIG. 5
illustrates a side view of the support structure
110
in accordance with the embodiment of FIG.
1
.
FIGS. 6A and 6B
illustrate a side view and a top view, respectively, of the insulator structure
115
in accordance with the embodiment of FIG.
1
.
The housing structure
105
(see
FIGS. 1-4
) is constructed and arranged to convey heat to be produced within the housing structure
105
from a first portion (e.g., a first end portion
106
) to a second portion (e.g., a second end portion
107
) of the housing structure
105
. The housing structure
105
includes an outer surface having a non-uniform cross section with respect to an axis
108
of the housing structure
105
. The outer surface of the housing structure
105
may include a cone shaped cross section.
FIG. 4
illustrates one embodiment of the size of the housing structure
105
, namely, L
1
=12.000 in., L
2
=5.850 in., and L
3
=4.900 in. As such, the housing structure
105
may form a channel to direct air (e.g., heated air) flow in a longitudinal direction of the housing structure
105
.
The housing structure
105
may be made of metal. For example, a metal sheet, having end portions, may include a plurality of fastener receiving openings
146
(see
FIG. 4
) formed therethrough adjacent to the end portions. To form the non-uniform cross section of the housing structure
105
with respect to the axis
108
of the housing structure
105
, then the fastener receiving openings
146
at one end portion of the metal sheet are aligned with the fastener receiving openings
146
at the other end portion of the metal sheet, and a set of fasteners
145
(e.g., threaded bolts) is inserted through the fastener receiving openings
146
. A set of threaded nuts may be threaded onto the ends of fasteners
145
inside the housing structure
105
and tightened to secure the one end portion of the metal sheet to the other end portion of the metal sheet. The fasteners
145
may include rivets.
The housing structure
105
may be oriented, for example, when secured to a dryer (e.g., gas and/or electric clothes dryer), such that the axis
108
of the housing structure
105
is at least one of horizontal and substantially horizontal. The support structure
110
, the insulator structure
115
, and the heating structure
120
may be positioned entirely or partially within the housing structure
105
. The size, shape, material, and/or arrangement of the support structure
110
, the insulator structure
115
, the heating structure
120
, and/or the housing structure
105
may be varied according to the preference of a user of the heater assembly
100
.
The support structure
110
(see
FIGS. 1-3
,
5
) is constructed and arranged to be releasably and fixedly secured to the housing structure
105
. At least one of the housing structure
105
and the support structure
110
may include a projection for interlocking with the other of the housing structure
105
and the support structure
110
such that the support structure
110
is releasably and fixedly secured to the housing structure
105
. The support structure
100
may be oriented to be about an axis (not shown) of the support structure
100
that is parallel and/or co-linear with respect to the axis
108
of the housing structure
105
.
The projection of the support structure
110
may include a tab
111
, and the projection of the housing structure
105
may include a tab receiving opening
112
(see FIG.
4
), constructed and arranged to receive the tab
111
. The tab
111
of the support structure
110
may be constructed and arranged to be inserted through the tab receiving opening
112
of the housing structure
105
and, once inserted, the tab
111
may extend through the tab receiving opening
112
to secure the support structure
110
to the housing structure
105
, while accommodating expansion and contraction of the support structure
110
due to heating and cooling. The tab
111
, for example, extending through the tab receiving opening
112
may not be bent and/or welded integrally with the housing structure
105
. The support structure
110
may include four tabs
111
, and four tab receiving openings
112
.
The housing structure
105
includes a fastener receiving opening
147
formed therethrough. The support structure
110
includes an attachment portion
151
(see FIG.
2
), which includes a corresponding fastener receiving opening
149
formed therethrough. To secure the support structure
110
to the housing structure
105
, the attachment portion
151
of the support structure
110
is placed against a surface of the housing structure
105
with the fastener receiving openings
147
,
149
in alignment, and a fastener
148
(e.g., threaded bolt) is inserted through the fastener receiving openings
147
,
149
. Then, a threaded nut (not shown) may be threaded onto the end of the fastener
148
inside the housing structure
105
and tightened to secure (e.g., without excessive looseness and vibration but permitting expansion and contraction due to heating and cooling) the attachment portion
151
of the support structure
110
to the interior of the housing structure
105
, as well as to further secure the one end portion of the metal sheet to the other end portion of the metal sheet.
The support structure
110
may also include a first side portion
102
and a second side portion
103
(see FIG.
5
), where at least one of the first side portion
102
and the second side portion
103
of the support structure
110
is constructed and arranged to abut the housing structure
105
(see FIG.
1
). One of the first side portion
102
and the second side portion
103
of the support structure
110
may entirely abut the housing structure
105
, where the other of the first side portion
102
and the second side portion
103
of the support structure
110
may partially abut the housing structure
105
(see FIG.
1
).
The support structure
110
may include at least one of a first insulator structure receiving opening
117
and a second insulator structure receiving opening
117
(see
FIGS. 1
,
5
), where each of the first insulator structure receiving opening
117
and the second insulator structure receiving opening
117
is constructed and arranged to receive the insulator structure
115
. The first insulator structure receiving opening
117
and the second insulator structure receiving opening
117
may be oriented to be about an axis
118
(see
FIG. 5
) parallel with respect to the at least one of the first side portion
102
and the second side portion
103
of the support structure
110
. Moreover, the first insulator structure receiving opening
117
and the second insulator structure receiving opening
117
may be oriented to be about an axis
150
(see
FIG. 1
) parallel with respect to the axis
108
of the housing structure
105
.
FIGS. 1 and 5
illustrate the support structure
110
including a plurality (e.g., ten) of insulator structure receiving openings
117
.
The heat to be produced within the housing structure
105
, for example, from the first portion (e.g., the first end portion
106
) to the second portion (e.g., the second end portion
107
) of the housing structure
105
may cause the second end portion
107
of the support structure
110
to experience thermal changes (e.g., significant thermal changes), and thus expansion and/or contraction. Without a thermal fatigue controller portion, a support structure may experience thermal fatigue cracks, for example, along sides of an insulator structure receiving opening, positioned adjacent to an end portion of the support structure. If sufficient growth of thermal fatigue cracks results on the support structure, then an insulator structure, initially secured by the insulator structure receiving opening, may become unsecured and unattached to the insulator structure receiving opening, resulting in failure of a heater assembly.
As such, the support structure
110
may include a thermal fatigue controller portion
140
(see
FIGS. 1
,
5
) (e.g., contoured shape of a second end portion
107
of the support structure) to accommodate expansion and contraction of the support structure
110
, for example, due to heating and cooling. The thermal fatigue controller portion
140
may be positioned to be adjacent to at least one of the first end portion
106
and the second end portion
107
of the support structure
110
, and may include the insulator structure receiving opening
117
and a thermal fatigue controller opening
101
. The thermal fatigue controller opening
101
may be a cut out portion of the support structure
110
, and may be positioned between a set of insulator structure receiving openings
117
, positioned within the thermal fatigue controller portion
140
of the support structure
110
(see
FIGS. 1
,
5
). The insulator structure receiving opening
117
and the thermal fatigue controller opening
101
may be positioned to be adjacent to each other. Also, the thermal fatigue controller opening
101
may be positioned to be adjacent to at least one of the first side portion
102
and the second side portion
103
of the support structure
110
. Moreover, the thermal fatigue controller opening
101
may be positioned to be between the first side portion
102
and the second side portion
103
of the support structure
110
.
The insulator structure receiving opening
117
may include a side portion
119
, which may be positioned adjacent to at least one of the first end portion
106
and the second end portion
107
of the support structure
110
. As such,
FIGS. 1 and 2
illustrate a pair of insulator structure receiving openings
117
, positioned adjacent to the first end portion
106
of the support structure
110
, having less than four side portions
119
. As a result, the support structure
110
may be made using less material, and/or the support structure
110
may be constructed and arranged to not extend to at least one of the first end portion
106
and the second end portion
107
of the housing structure
105
. The support structure
110
, however, may be constructed and arranged to extend to at least one of the first end portion
106
and the second end portion
107
of the housing structure
105
, according to the preference of the user of the heater assembly
100
.
The insulator structure
115
(see
FIGS. 1-3
,
6
) is affixed to the support structure
110
to be releasably and fixedly secured to the housing structure
105
. At least one of the support structure
110
and the insulator structure
115
may include a projection for interlocking with the other of the support structure
110
and the insulator structure
115
such that the insulator structure
115
is affixed to the support structure
110
to be releasably and fixedly secured to the housing structure
105
. The projection of the support structure
110
may include a tab
143
(see
FIGS. 1
,
5
) (e.g., a bendable tab), and the projection of the insulator structure
115
may include a tab receiving opening
144
(see, for example, FIG.
6
), which may be constructed and arranged to receive the tab
143
and/or a portion of the support structure
110
. As such, the support structure
110
may releasably and fixedly secure the insulator structure
115
, and accommodate expansion and contraction of the insulator structure
115
due to heating and cooling.
The insulator structure
115
may include a first heating structure receiving opening
116
and a second heating structure receiving opening
116
(see
FIGS. 3
,
6
). The support structure
110
may include a first side portion
113
and a second side portion
114
(see FIG.
3
). Then, at least one of the first heating structure receiving opening
116
and the second heating structure receiving opening
116
of the insulator structure
115
may be positioned to be adjacent to at least one of the first side portion
113
and the second side portion
114
of the support structure
110
.
The insulator structure
115
may also include a side portion
142
(see
FIGS. 2
,
6
B), which may be constructed and arranged to be oriented perpendicular to the axis
108
of the housing structure
105
, for example, to facilitate assembly of the heating structure
120
to the insulator structure
115
. Moreover, the side portion
142
of the insulator structure
115
may be constructed and arranged to be oriented centered about at least one of (i) the axis
150
parallel with respect to the axis
108
of the housing structure
105
, and (ii) the axis
118
parallel with respect to the at least one of the first side portion
102
and the second side portion
103
of the support structure
110
. The insulator structure
115
may be made of ceramic. Also, the insulator structure
115
may be positioned a sufficient distance from the housing structure
105
to accommodate movement (e.g., due to gravity) by the heating structure
120
during heating and/or cooling, and thus to prevent electrical and/or mechanical clearance problems.
The heating structure
120
(see
FIGS. 1-3
) is routed and affixed to the insulator structure
115
to be releasably and fixedly secured to the housing structure
105
, and to be insulated from at least one of the housing structure
105
and the support structure
110
. For example, the heating structure
120
may be affixed to at least one of the first heating structure receiving opening
116
and the second heating structure receiving opening
116
of the insulator structure
115
to be releasably and fixedly secured to the housing structure
105
.
The heating structure
120
may include a resistive heating structure. In turn, the resistive heating structure may include a resistive heating coil. In turn, the resistive heating coil may be helical wound. An axis
121
(see
FIG. 1
) of the resistive heating coil, being helical wound, may be oriented perpendicular with respect to the axis
108
of the housing structure
105
. The heating structure
120
may be coupled to a source of electric current such that the heating structure
120
may be heated, as current flows through the heating structure
120
, to radiate energy. Then, a flow of air may be used to transfer the energy radiated from the heating structure
120
by conduction.
That is, the resistance heating coil may be pulled apart at selected points along its length and installed on the insulator structures
115
in vertical coil “passes” (see FIGS.
1
-
3
), which may be oriented perpendicular with respect to a forced air flow to maximize the transfer of thermal energy from the resistance heating coil to the moving air flow. Any gravitationally induced movement of a pass of the resistance heating coil toward a surface of the housing structure
105
constructed and arranged to be adjacent to the second side portion
103
of the support structure
110
may be minimized or stopped by an insulator structure
105
constructed and arranged to be positioned adjacent to an end portion (e.g., bottom end portion) of at least one of the coil passes. The length of at least one of the coil passes may be varied depending on the position of the coil pass along the non-uniform cross section of the housing structure
105
, with respect to the axis
108
of the housing structure
105
.
As described above, a plurality of insulator structure receiving openings
117
may be oriented to be about the axis
150
, which is parallel with respect to the axis
108
of the housing structure
105
.
FIG. 1
illustrates that the distance between the axis
150
and the first side portion
102
of the support structure
110
is greater near the first end portion
106
of the support structure
110
than near the second end portion
107
of the support structure
110
. Once installed, the heater assembly
100
then may accommodate expansion and/or contraction of the heating structure
120
, for example, due to heating and/or cooling by allowing the heating structure
120
to move (e.g., due to gravity) during contraction (or heating) such that the distance between the axis
150
and a surface of the housing structure
105
, constructed and arranged to be adjacent to the first side portion
102
of the support structure
110
, increases. As such, the heating structure
120
is constructed and arranged to move in a direction away from the surface of the housing structure
105
, constructed and arranged to be adjacent to the first side portion
102
of the support structure
110
, to prevent unintended contacts with other structures of the heater assembly
100
.
The resistance heating coil may be positioned to be adjacent to the first side portion
113
and the second side portion
114
of the support structure
110
. As such, the support structure
110
may include a heating structure transitioning opening
141
(see FIG.
5
), which may be constructed and arranged to transition the heating structure
120
from adjacent to one of the first side portion
113
and the second side portion
114
of the support structure
110
to adjacent to the other one of the first side portion
113
and the second side portion
114
of the support structure
110
. The resistance heating coil may be opened (e.g., unwound) at a center portion such that the transition may be made from one side portion of the support structure
110
to the other side portion of the support structure
110
, for example, with sufficient electrical and/or mechanical clearance to the support structure
110
. The heating structure transitioning opening
141
may be positioned to be adjacent to at least one of the first end portion
106
and the second end portion
107
of the support structure
110
. Also, the heating structure transitioning opening
141
may be positioned to be adjacent to at least one of the first side portion
102
and the second side portion
103
of the support structure
110
. Moreover, the heating structure transitioning opening
141
may be positioned to be between the first side portion
102
and the second side portion
103
of the support structure
110
.
The heating structure transitioning opening
141
, for example, may be positioned to be adjacent to the second side portion
103
of the support structure
110
such that movement due to gravity by the heating structure
120
, positioned within the thermal fatigue controller portion
140
, may be away from a surface of the housing structure
105
, positioned adjacent to the first side portion
102
of the support structure
110
. Sufficient distance may be provided between the heating structure
120
, positioned within the heating structure transitioning opening
141
, and a surface of the housing structure
105
, positioned adjacent to the second side portion
103
of the support structure
110
to accommodate movement of the heating structure
120
, for example, due to gravity.
The heater assembly
100
(see
FIGS. 1
,
3
) may further include a terminal block structure
125
and a terminal structure
130
.
FIGS. 7A
,
7
B and
7
C illustrate a top view, a front view and a rear view, respectively, of the terminal block structure
125
in accordance with the embodiment of FIG.
1
.
FIG. 8
illustrates a top view of the terminal structure
130
in accordance with the embodiment of FIG.
1
.
The terminal block structure
125
(see
FIGS. 1
,
3
,
7
) (e.g., insulator terminal block) is constructed and arranged to be releasably and fixedly secured to the housing structure
105
, and to retain the terminal structure
130
in position. The terminal block structure
125
may be positioned to be adjacent to at least one of the first end portion
106
and the second end portion
107
of the housing structure
105
. As such, the terminal block structure
125
may be constructed and arranged to be a sufficient distance away from the support structure
110
(see FIG.
1
), for example, to allow the terminal block structure
125
and/or the end (straight) portions of the heating structure
120
(which may be energized) not to be interfered with by the surface of the support structure
110
(e.g., to avoid contact with the support structure
110
) and/or the metal of the support structure
110
(e.g., to avoid a short circuit with the support structure
110
). It is, for example, easier to route the end portions of the heating structure
120
toward the terminal block structure
125
without interference from the support structure
110
.
At least one of the terminal block structure
125
and the housing structure
105
may include a projection for interlocking with the other of the terminal block structure
125
and the housing structure
105
such that the terminal block structure
125
is releasably and fixedly secured to the housing structure
105
. The projection of the terminal block structure
125
may include a tab
126
(see
FIGS. 3
,
7
A), and the projection of the housing structure
105
may include a tab receiving opening (see
FIGS. 1
,
3
), which may be constructed and arranged to receive the tab
126
.
The housing structure
105
may also include a fastener receiving opening (not shown) formed therethrough, and positioned thereon (see, for example,
FIG. 3
) according to the preference of a user of the heater assembly
100
. The terminal block structure
125
may also include a corresponding fastener receiving opening
127
(see
FIG. 7
) formed therethrough. To secure the terminal block structure
125
to the housing structure
105
, a surface of the terminal block structure
125
is placed against a surface of the housing structure
105
with the fastener receiving openings in alignment, and a fastener (e.g., threaded bolt, rivet) (not shown) is inserted through the fastener receiving openings. Then, a threaded nut (not shown) may be threaded onto the end of the fastener inside the housing structure
105
and tightened to secure the terminal block structure
125
to the housing structure
105
.
The terminal structure
130
(see
FIGS. 1
,
3
,
8
), having a first end
131
and a second end
132
, is coupled to the heating structure
120
at the first end
131
of the terminal structure
130
and to the terminal block structure
125
at the second end
132
of the terminal structure
130
. The heater assembly
100
may include, for example, a set of terminal structures
130
such that a terminal structure
130
may be coupled to each end of the heating structure
120
.
Another embodiment of a heater assembly
100
may include a housing structure
105
, an insulator support structure, and a heating coil
120
(such as, for example, illustrated in FIGS.
1
-
6
). The housing structure
105
may convey heat to be produced within the housing structure
105
from a first portion (e.g., first end portion) to a second portion (e.g., second end portion) of the housing structure
105
. The housing structure
105
may include a first area at the first portion of the housing structure
105
and a second area at the second portion of the housing structure
105
, where one of the first area and the second area is a larger area than the other one of the first area and the second area. The housing structure
105
may also include an outer surface having a cone shaped cross section, and may be oriented, for example, when secured to a dryer (e.g., clothes dryer) such that an axis
108
of the housing structure
105
is at least one of horizontal and substantially horizontal.
The insulator support structure may be releasably and fixedly secured to the housing structure. The insulator support structure may include a support structure
110
and an insulator structure
115
. As such, the support structure
110
may be releasably and fixedly secured to the housing structure
105
, and the insulator structure
115
may be affixed to the support structure
110
to be releasably and fixedly secured to the housing structure
105
.
The heating coil
120
may be affixed to the insulator support structure to be releasably and fixedly secured to the housing structure
105
, and to be insulated from the housing structure
105
. The heating coil
120
may be helical wound, and an axis
121
of the heating coil
120
may then be oriented to be perpendicular with respect to the axis
108
of the housing structure
105
. The insulator support structure and the heating coil
120
may be positioned entirely or partially within the housing structure
105
.
An embodiment of a method for assembling a heater
100
(such as, for example, illustrated in
FIGS. 1-8
) is provided. The method affixes an insulator structure
115
to a support structure
110
, and affixes a heating structure
120
to the insulator structure
115
. The method then secures the support structure
110
to a housing structure
105
. The support structure
110
, the insulator structure
115
, and the heating structure
120
may be releasably and fixedly secured to the housing structure
105
, and may be positioned entirely or partially within the housing structure
105
. The method may simply roll a portion of heat conducting material (e.g., metal), for example, using a rolling tool, to form the housing structure
105
. The housing structure
105
may be made of metal.
The insulator structure
115
may insulate the heating structure
120
from at least one of the housing structure
105
and the support structure
110
. The housing structure
105
, including an outer surface having a non-uniform cross section with respect to an axis
108
of the housing structure
105
, may convey heat to be produced within the housing structure
105
from a first portion to a second portion of the housing structure
105
. The outer surface of the housing structure
105
may include a cone shaped cross section.
The heating structure
120
may include a resistive heating coil, which may be helical wound. An axis of the resistive heating coil, being helical wound, may be oriented to be perpendicular with respect to the axis
108
of the housing structure
105
.
The method may also secure a terminal block structure
125
to at least one of the housing structure
105
and the support structure
110
, and couple a terminal structure
130
, having a first end and a second end, to the heating structure
120
at the first end of the terminal structure
130
and to the terminal block structure
125
at the second end of the terminal structure
130
. The terminal block structure
125
may be releasably and fixedly secured to the housing structure
105
and/or the support structure
110
.
Thus, the described embodiments of a heater assembly may include a housing having a non-uniform cross section with respect to an axis of the housing, for example, to be used in dryers (e.g., clothes dryer). Such a heater housing may be configured to be compatible, for example, in both gas and electric clothes dryer. As such, the amount of compatible parts between gas and electric clothes dryers is increased, which reduces costs for manufacturers of both gas and electric dryers. Also, the described embodiments of the heater assembly may include a open, electric heater coil in the housing having the non-uniform cross section with respect to the axis of the housing.
FIG. 9
illustrates a cross-sectional, side view of another embodiment of a heater assembly
100
.
FIG. 10
illustrates a cross-sectional, bottom view of the embodiment of FIG.
9
.
FIG. 11
illustrates a cross-sectional, end view of the embodiment of FIG.
9
.
FIG. 12
illustrates a top view of a housing structure
105
in accordance with the embodiment of FIG.
9
.
FIGS. 13A and 13B
illustrate a side view and a top view, respectively, of a support structure
110
in accordance with the embodiment of FIG.
9
. In
FIGS. 1-13
, however, like reference numerals represent similar parts of the illustrated embodiments, and the generic principles presented herein may be applied to the illustrated embodiment of
FIGS. 9-13
.
FIG. 9
, however, illustrates the support structure
110
extending to the first end portion
106
of the housing structure
105
(cf. FIG.
1
).
FIGS. 9 and 10
, also, illustrate the terminal block structure
125
releasably and fixedly secured to the support structure
110
, and may be positioned to be adjacent to the first side portion
102
of the support structure
110
(cf. FIG.
3
). As such, the insulator structure
115
, the heating structure
120
, the terminal block structure
125
, and/or the terminal structure
130
may be assembled onto the support structure
110
separately from the housing structure
105
. The support structure
100
, once assembled as such, may then be assembled into the housing structure
105
to form the heater assembly
100
.
FIGS. 9-11
, furthermore, illustrate the terminal block structure
125
positioned to be adjacent to the first end portion
106
of the housing structure
105
. The housing structure
105
may include a terminal block receiving opening to receive the terminal block structure
125
(see FIG.
12
).
The support structure
110
may include a tab
161
having a fastener receiving opening
160
(see
FIG. 13B
) formed therethrough. The terminal block structure
125
may include a corresponding fastener receiving opening
127
(see
FIG. 7
) formed therethrough. To secure the terminal block structure
125
to the support structure
110
, a surface of the terminal block structure
125
is placed against a surface of the support structure
110
with the fastener receiving openings in alignment, and a fastener (e.g., threaded bolt, rivet) (not shown) is inserted through the fastener receiving openings. Then, a threaded nut (not shown) may be threaded onto the end of the fastener and tightened to secure the terminal block structure
125
to the support structure
110
. The tab
161
may be oriented to be at a right (90°) angle with respect to the first side portion
113
and/or the second side portion
114
of the support structure
110
(see FIG.
13
B).
FIGS. 14A and 14B
illustrate a front view and a side view, respectively, of the embodiment of
FIG. 1
or
9
coupled to a dryer
200
. The heater assembly
100
, however, may be used with other equipment as well. The dryer
200
may include a dryer housing
201
, a drum
205
, a duct
210
, and a heater assembly
100
. The drum
205
, the duct
210
, and the heater assembly
100
may be positioned within the dryer housing
201
. Also, the drum
205
and the heater assembly
100
may both be coupled to the duct
210
. The drum
205
, constructed and arranged to rotate, may include a stationary back portion
206
, where the back portion
206
may include air (e.g., hot air) receiving openings
207
formed therethrough.
Air (denoted by squiggly arrows in
FIG. 14B
) may be drawn, using a blower (not shown), into the heater assembly
100
to be heated (e.g., electrically heated) and delivered, through the duct
210
, to the drum
205
. As such, the duct
210
, coupled to the heater assembly
100
, may receive the heated air from the heater assembly
100
. In turn, the drum
205
, coupled to the duct
210
, may receive the heated air from the duct
201
through the air receiving openings
207
.
Some dryers (e.g., clothes dryers) require that the end portion of the housing structure
105
, coupled directly or indirectly to the duct
210
and the drum
205
, to be smaller, for example, in area than the other end portion of the housing structure
105
that receives air (e.g., unheated air) to be delivered as heated air to the drum
205
. The housing structure
105
alone, however, may be used in such dryers since one end portion of the housing structure
105
may be constructed and arranged to be smaller than the other end portion of the housing structure
105
(see described embodiments above, illustrated in FIGS.
1
and
9
). As such, the housing structure
105
is not required to be coupled to a transition structure, constructed and arranged to be made part of or be a separate part of the housing structure
105
, to satisfy such a requirement from manufacturers of dryers.
As a result, the housing structure
105
may be constructed and arranged to be more efficient and effective in design, construction, and costs, among others. For example, the shape for the housing structure
105
having an inlet area, positioned at one end of the housing structure
105
, larger than an exit area, positioned at another end of the housing structure
105
, may be constructed and arranged, for example, using a simple tool (e.g., rolling tool), and, for example, not using specialized tools or dies, used presently to form and stretch the metal of known heater housings. Also, the housing structure
105
, having the inlet area larger than the exit area, may be constructed and arranged to provide a larger volume of space, for example, for a support structure
110
, an insulator structure
115
, and/or a heating structure
120
to occupy therein than known heater housings. As such, more space may be available for the heating structure
120
than for known heater housings to lessen present electrical clearance concerns.
Then, the foregoing presentation of the described embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments are possible, and the generic principles presented herein may be applied to other embodiments as well. As such, the present invention is not intended to be limited to the embodiments shown above, and/or any particular configuration of structure but rather is to be accorded the widest scope consistent with the principles and novel features disclosed in any fashion herein.
Claims
- 1. A heater assembly comprising:a housing structure constructed and arranged to convey heat to be produced within the housing structure from a first portion of the housing structure to a second portion of the housing structure; a support structure constructed and arranged to be releasably and fixedly secured to the housing structure; an insulator structure affixed to the support structure to be releasably and fixedly secured to the housing structure; and a heating structure affixed to the insulator structure to be releasably and fixedly secured to the housing structure, and to be insulated from at least one of the housing structure and the support structure, wherein the housing structure includes an outer surface having a non-uniform cross section with respect to an axis of the housing structure, and wherein the support structure, the insulator structure, and the heating structure are positioned within the housing structure.
- 2. The heater assembly of claim 1, wherein the outer surface of the housing structure includes a cone shaped cross section.
- 3. The heater assembly of claim 1, wherein the heating structure includes a resistive heating structure.
- 4. The heater assembly of claim 3, wherein the resistive heating structure includes a resistive heating coil.
- 5. The heater assembly of claim 4, wherein the resistive heating coil is helical wound.
- 6. The heater assembly of claim 5, wherein an axis of the resistive heating coil, being helical wound, is oriented to be perpendicular with respect to the axis of the housing structure.
- 7. The heater assembly of claim 1, further comprisinga terminal block structure constructed and arranged to be releasably and fixedly secured to the housing structure; and a terminal structure, having a first end and a second end, coupled to the heating structure at the first end of the terminal structure and to the terminal block structure at the second end of the terminal structure.
- 8. The heater assembly of claim 1, wherein at least one of the housing structure and the support structure includes a projection for interlocking with the other of the housing structure and the support structure such that the support structure is releasably and fixedly secured to the housing structure.
- 9. The heater assembly of claim 8,wherein the projection of the support structure includes a tab, and wherein the projection of the housing structure includes a tab receiving opening, constructed and arranged to receive the tab.
- 10. The heater assembly of claim 1, wherein the insulator structure is made of ceramic.
- 11. The heater assembly of claim 1,wherein the insulator structure includes a first heating structure receiving opening and a second heating structure receiving opening, and wherein the heating structure is affixed to at least one of the first heating structure receiving opening and the second heating structure receiving opening of the insulator structure to be releasably and fixedly secured to the housing structure.
- 12. The heater assembly of claim 11,wherein the support structure includes a first side portion and a second side portion, and wherein the first heating structure receiving opening of the insulator structure is positioned to be adjacent to the first side portion of the support structure and the second heating structure receiving opening of the insulator structure is positioned to be adjacent to the second side portion of the support structure.
- 13. The heater assembly of claim 12, wherein the support structure includes a heating structure transitioning opening, constructed and arranged to transition the heating structure from adjacent to the first side portion to adjacent to the second side portion of the support structure.
- 14. The heater assembly of claim 1,wherein the support structure includes a first side portion and a second side portion, at least one of the first side portion and the second side portion of the support structure being constructed and arranged to abut the housing structure.
- 15. The heater assembly of claim 14,wherein one of the first side portion and the second side portion of the support structure entirely abuts the housing structure, and wherein the other of the first side portion and the second side portion of the support structure partially abuts the housing structure.
- 16. The heater assembly of claim 14,wherein the support structure includes a first insulator structure receiving opening and a second insulator structure receiving opening, each of the first insulator structure receiving opening and the second insulator structure receiving opening being constructed and arranged to receive the insulator structure, and wherein the first insulator structure receiving opening and the second insulator structure receiving opening are oriented to be about an axis parallel with respect to the at least one of the first side portion and the second side portion of the support structure.
- 17. The heater assembly of claim 1, wherein the support structure includes an insulator structure receiving opening, constructed and arranged to receive the insulator structure.
- 18. The heater assembly of claim 17,wherein the support structure includes an end portion, and wherein the insulator structure receiving opening includes a side portion, constructed and arranged to be positioned adjacent to the end portion of the support structure.
- 19. The heater assembly of claim 17,wherein the support structure includes a thermal fatigue controller portion, wherein the thermal fatigue controller portion of the support structure includes the insulator structure receiving opening and a thermal fatigue controller opening, and wherein the thermal fatigue controller opening is constructed and arranged to accommodate expansion and contraction of the support structure due to heating and cooling.
- 20. The heater assembly of claim 19, wherein the insulator structure receiving opening and the thermal fatigue controller opening are positioned to be adjacent to each other.
- 21. The heater assembly of claim 19,wherein the support structure includes an end portion, and wherein the thermal fatigue controller portion of the support structure is positioned to be adjacent to the end portion of the support structure.
- 22. The heater assembly of claim 1, wherein the housing structure is oriented such that the axis of the housing structure is at least one of horizontal and substantially horizontal.
- 23. The heater assembly of claim 1, wherein the insulator structure includes a side portion, constructed and arranged to be oriented perpendicular to the axis of the housing structure.
- 24. The heater assembly of claim 23,wherein the support structure includes a first insulator structure receiving opening and a second insulator structure receiving opening, each of the first insulator structure receiving opening and the second insulator structure receiving opening being constructed and arranged to receive the insulator structure, and wherein the first insulator structure receiving opening and the second insulator structure receiving opening are oriented to be about an axis parallel with respect to the axis of the housing structure.
- 25. The heater assembly of claim 24, wherein the side portion of the insulator structure is constructed and arranged to be oriented centered about the axis parallel with respect to the axis of the housing structure.
- 26. The heater assembly of claim 1, wherein at least one of the support structure and the insulator structure includes a projection for interlocking with the other of the support structure and the insulator structure such that the insulator structure is affixed to the support structure to be releasably and fixedly secured to the housing structure.
- 27. The heater assembly of claim 26,wherein the projection of the support structure includes a tab, and wherein the projection of the insulator structure includes a tab receiving opening, constructed and arranged to receive the tab.
- 28. The heater assembly of claim 1,wherein the housing structure includes a first area at the first portion of the housing structure and a second area at the second portion of the housing structure, and wherein one of the first area and the second area is a larger area than the other one of the first area and the second area.
- 29. The heater assembly of claim 28,wherein the first portion of the housing structure includes a first end portion of the housing structure, wherein the second portion of the housing structure includes a second end portion of the housing structure, and wherein the first area at the first end portion of the housing structure is a larger area than the second area at the second end portion of the housing structure.
- 30. A heater assembly comprising:a housing structure constructed and arranged to convey heat to be produced within the housing structure from a first end portion of the housing structure to a second end portion of the housing structure; an insulator support structure constructed and arranged to be releasably and fixedly secured to the housing structure; and a heating coil affixed to the insulator support structure to be releasably and fixedly secured to the housing structure, and to be insulated from the housing structure, wherein the housing structure includes a first area at the first end portion of the housing structure and a second area at the second end portion of the housing structure, wherein one of the first area and the second area is a larger area than the other one of the first area and the second area, and wherein the insulator support structure and the heating coil are positioned within the housing structure.
- 31. The heater assembly of claim 30,wherein the first area at the first end portion of the housing structure is a larger area than the second area at the second end portion of the housing structure.
- 32. The heater assembly of claim 30, wherein the housing structure includes an outer surface having a cone shaped cross section.
- 33. The heater assembly of claim 30, wherein the insulator support structure includes a support structure and an insulator structure.
- 34. The heater assembly of claim 33,wherein the support structure is releasably and fixedly secured to the housing structure, and wherein the insulator structure is affixed to the support structure to be releasably and fixedly secured to the housing structure.
- 35. The heater assembly of claim 30, wherein the heating coil is helical wound.
- 36. The heater assembly of claim 35, wherein an axis of the heating coil, being helical wound, is oriented to be perpendicular with respect to an axis of the housing structure.
- 37. The heater assembly of claim 30, wherein the insulator structure includes a side portion, constructed and arranged to be oriented perpendicular to an axis of the housing structure.
- 38. The heater assembly of claim 30, wherein the housing structure is oriented such that an axis of the housing structure is at least one of horizontal and substantially horizontal.
- 39. A method for assembling a heater comprising:affixing an insulator structure to a support structure; affixing a heating structure to the insulator structure; and securing the support structure to a housing structure, wherein the support structure, the insulator structure, and the heating structure are constructed and arranged to be releasably and fixedly secured to the housing structure, and to be positioned within the housing structure, wherein the insulator structure is constructed and arranged to insulate the heating structure from at least one of the housing structure and the support structure, and wherein the housing structure, including an outer surface having a non-uniform cross section with respect to an axis of the housing structure, is constructed and arranged to convey heat to be produced within the housing structure from a first portion of the housing structure to a second portion of the housing structure.
- 40. The method of claim 39, wherein the outer surface of the housing structure includes a cone shaped cross section.
- 41. The method of claim 39, wherein the heating structure includes a resistive heating coil.
- 42. The method of claim 41, wherein the resistive heating coil is helical wound.
- 43. The method of claim 42, wherein an axis of the resistive heating coil, being helical wound, is oriented to be perpendicular with respect to the axis of the housing structure.
- 44. The method of claim 39, further comprisingsecuring a terminal block structure to at least one of the housing structure and the support structure; and coupling a terminal structure, having a first end and a second end, to the heating structure at the first end of the terminal structure and to the terminal block structure at the second end of the terminal structure, wherein the terminal block structure is constructed and arranged to be releasably and fixedly secured to the at least one of the housing structure and the support structure.
- 45. The method of claim 39, further comprisingorienting the housing structure such that the axis of the housing structure is at least one of horizontal and substantially horizontal.
- 46. The method of claim 39, further comprisingorienting the insulator structure, including a side portion, such that the side portion of the insulator structure is perpendicular to the axis of the housing structure.
- 47. The method of claim 39,wherein the housing structure includes a first area at the first portion of the housing structure and a second area at the second portion of the housing structure, and wherein one of the first area and the second area is a larger area than the other one of the first area and the second area.
- 48. The method of claim 47,wherein the first portion of the housing structure includes a first end portion of the housing structure, wherein the second portion of the housing structure includes a second end portion of the housing structure, and wherein the first area at the first end portion of the housing structure is a larger area than the second area at the second end portion of the housing structure.
- 49. The method of claim 39, further comprisingrolling a portion of heat conducting material to form the housing structure, wherein the housing structure is made of the portion of heat conducting material.
US Referenced Citations (22)