Information
-
Patent Grant
-
6263964
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Patent Number
6,263,964
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Date Filed
Friday, November 12, 199924 years ago
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Date Issued
Tuesday, July 24, 200122 years ago
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Inventors
-
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Examiners
- Lazarus; Ira S.
- Ciric; Ljiljana V.
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CPC
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US Classifications
Field of Search
US
- 165 481
- 165 300
- 062 2386
- 062 2387
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International Classifications
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Abstract
A heat exchanging apparatus in cooperation with a refrigeration system. The apparatus comprises water lines, a thermos tank for storing water, a thermostat, heat collecting tanks in communication with the water lines having a refrigerant line passed therethrough for water to absorb the heat released by refrigerant transferred from the compressor to the condenser of the refrigeration system, a pump, and drive a controller wherein the pump pumps heated water to the thermos tank for storage. The drive controller is electrically connected to the thermos tank for measuring the temperature of the water for determining whether to stop an operation of the pump as compared to a predetermined temperature.
Description
FIELD OF THE INVENTION
The present invention relates to a heat exchanger, and more particularly, to a heat exchanging apparatus of a refrigeration system.
BACKGROUND OF THE INVENTION
Conventionally, a refrigerant circulated in the lines of a large refrigerating machine or air conditioner functions in transferring heat energy to a compressor and so on. Referring to
FIG. 1
, a typical refrigeration system comprises a compressor
1
for compressing refrigerant, a condenser
2
for receiving the high-pressure, high-temperature refrigerant from the compressor
1
and cooling it into a refrigerant having a temperature approximately equal to atmospheric temperature, an expansion valve
4
and an evaporator
5
for receiving the atmospheric temperature refrigerant from the condenser
2
and vaporizing it to achieve a refrigeration effect. Further, it is often necessary to provide a cooling tower
3
in fluid communication with the condenser
2
for quickly lowering the temperature of the refrigerant. However, providing the cooling tower
3
consumes additional energy. From another aspect, while equipped with the cooling tower
3
, such a typical refrigeration system is still disadvantageous due to the lengthy temperature-lowering process. To make it worse, only the refrigeration effect is somewhat satisfied, while energy is not effectively utilized in the refrigeration cycle as a whole.
Traditionally, a person uses a heater powered by gas or electricity to heat cold water to a desired high temperature for a predetermined time. One may think that if one can use latent energy not utilized by the refrigeration system to heat the cold water to an intermediate temperature such that then one can use such warm water directly from the tap in daily life. Alternatively, if higher temperature water is desired, one can use also a heater to heat the warm water to the desired high temperature. The design of the present invention is aimed at utilizing such latent energy for increasing the thermal efficiency of a refrigeration system.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a heat exchanging apparatus of refrigeration system which extracts and utilizes the heat released by the refrigerant transferred from the compressor to the condenser during the temperature-lowering process for heating cold water to a predetermined temperature.
It is another object of the present invention to provide a heat exchanging apparatus for a refrigeration system which has a novel heat absorption process having the advantages of saving the material of the refrigerant line and reducing the operation time of a cooling tower, thereby saving energy.
The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a schematic block diagram of a prior art refrigeration system;
FIG. 2
is a schematic block diagram of a first embodiment of a heat exchanging apparatus for a refrigeration system of the present invention; and
FIG. 3
is a schematic block diagram of a second embodiment of a heat exchanging apparatus for a refrigeration system of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to
FIG. 2
, there is shown a first embodiment of a heat exchanging apparatus for a refrigeration system constructed in accordance with the invention. The system of the present invention, comprising a plurality of heat collecting tanks (two heat collecting tanks
10
and
10
′ are shown), a drive controller
20
, a thermos tank
30
, a thermostat
40
, and a pump
50
, is in cooperation with a conventional refrigeration system such as one embodied in a commercially available refrigerating machine or air-conditioner. The conventional refrigeration system comprises a compressor
60
, a condenser
70
, a cooling tower
80
, an expansion valve (or capillary tube)
90
, and an evaporator
100
. As is understood, a refrigerating machine (e.g., a refrigerator or ice machine) or an air-conditioner is operated to feed a low-temperature, low-pressure vapor refrigerant into the compressor
60
for compressing the refrigerant in order to generate a high-temperature, high-pressure refrigerant which is sent to the heat collecting tank
10
for storage through a one-way refrigerant line
12
.
Each of the heat collecting tanks
10
or
10
′ is a fluid container. The refrigerant line
12
loops through the whole system in which one section thereof connects the compressor
60
, the heat collecting tank
10
adjacent to the compressor
60
, and the condenser
70
. Two ports, in fluid communication with the water line
110
, are provided at opposite ends of the heat collecting tank
10
. The water line
110
is further in communication with the thermos tank
30
and the pump
50
.
The other heat collecting tank
10
′ is adjacent to the condenser
70
having the refrigerant line
12
passing therethrough. One end of the heat collecting tank
10
′ is provided as a cold water inlet
14
, while the other end of the heat collecting tank
10
′ is provided as an outlet for feeding water to the water line
110
′. The water line
110
′ acts to transfer water to the water line
110
between the thermos tank
30
and the pump
50
.
The drive controller
20
is a conventional electronic controller well-known to those skilled in the art and thus a detailed description thereof will be omitted herein for the sake of brevity. The drive controller
20
is electrically connected to the compressor
60
and the thermostat
40
, respectively. The thermostat
40
is electrically connected between the drive controller
20
and the thermos tank
30
so as to measure the temperature of the water. If the temperature of the water exceeds a predetermined temperature, a signal will transmit to the drive controller
20
to cause the pump
50
to stop operating immediately for saving energy.
The thermos tank
30
is used for storing water. The thermos tank
30
is made of a material capable of keeping the temperature of the water at a constant level. One end of the thermos tank
30
is an inlet in fluid communication with the water line
110
for feeding water from the heat collecting tank
10
. Note that a hot water outlet
16
is provided in the water line
110
between the heat collecting tank
10
and the thermos tank
30
for feeding hot water through a tap (not shown).
As stated above, the water line
110
′ is in fluid communication with the heat collecting tank
10
′. Cold water is fed to the cold water inlet
14
of the heat collecting tank
10
′ and filled up therein for heating. The pump
50
then pumps the heated water to the heat collecting tank
10
through the water line
110
. This heat absorption process continues until the temperature of water in the thermos tank
30
exceeds a predetermined temperature. At this time, pump
50
is stopped immediately.
It is seen that the high-temperature refrigerant contained in the refrigerant line
12
fed from the compressor
60
has transferred heat energy to the cold water in the heat collecting tanks
10
and
10
′. That is to say, the cold water is heated and the refrigerant entering the condenser
70
is at an intermediate temperature lower than that of the refrigerant leaving the compressor
60
. Note that the gaseous refrigerant leaving the compressor
60
has not changed its gaseous state. The cooling tower
80
is provided and is in the loop with the condenser
70
for further lowering the intermediate temperature of the refrigerant to an even lower one. Note that the cooling tower
80
continues to absorb heat from the refrigerant in the condenser
70
until the gaseous refrigerant becomes a liquid having a temperature approximately equal to the atmospheric temperature. The liquid refrigerant then is transferred to the expansion valve (or capillary tube)
90
through the refrigerant line
12
. The expansion valve
90
is operated to lower the pressure of the refrigerant to become a low-pressure, low-temperature liquid refrigerant which in turn transfers to the evaporator
100
through a line. The evaporator
100
is operated to release heat for the liquid refrigerant to absorb for vaporizing into a low-pressure, low-temperature gaseous refrigerant which, in turn, transfers to the compressor
10
to compress the refrigerant, thus completing a refrigeration cycle.
The operation of the pump
50
is controlled by the drive controller
20
. In detail, the pump
50
can draw cold water from outside into the heat collecting tank
10
′ to heat and can draw water stored in the thermos tank
30
into the heat collecting tank
10
. As such, water is cycled through the heat collecting tank
10
, the thermos tank
30
, and the pump
50
continuously until the water temperature in the thermos tank
30
detected by the thermostat
40
reaches a predetermined value. At this time, the pump
50
is stopped. As stated above, the user may use a tap to drain hot water from the water line
110
. In view of the foregoing, the present invention completely utilizes the heat released by the refrigerant from the compressor
60
to the condenser
70
through the heat collecting tanks
10
and
10
′. As a result, the energy to heat cold water to hot water (the temperature thereof is about 30° C. to 50° C.) as required by prior art techniques is saved by the present invention, thereby increasing thermal efficiency of the refrigeration system.
FIG. 3
illustrates a second embodiment of heat exchanging apparatus of the refrigeration system of the present invention. The configuration of the second embodiment is similar to that of the first embodiment. In detail, the refrigeration system comprises an evaporator
100
, a compressor
60
, a plurality of heat collecting tanks (
10
and
10
′ are shown), a condenser
70
, and an expansion valve
90
; all are interconnected by a line. Note that the heat collecting tanks
10
and
10
′ are also made of a material capable of keeping the temperature of the water at a constant level but their sizes are larger than those of the first embodiment. In other words, the heat collecting tanks
10
and
10
′ serve for maintaining the temperature and for water storage. Cold water is fed into the heat collecting tank
10
′ adjacent to the condenser
70
for primary heating. Then the heated water is introduced to the compressor
60
adjacent to the compressor
60
for secondary heating through the water line
110
. As shown, hot water is drained out of the heat collecting tank
10
when a tap (not shown) is opened. It is seen that the configuration of the second embodiment is simpler than that of first embodiment.
INDUSTRIAL APPLICATIONS
The present invention can be utilized to generate hot water for our daily use, especially in winter without additional energy.
While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope of the invention set forth in the claims.
Claims
- 1. A heat exchanging apparatus in cooperation with a refrigeration system including a compressor, a condenser, an expansion valve, and an evaporator being interconnected by a refrigerant line, the apparatus comprising:a first water line; a second water line; a thermos tank for storing water made of a material capable of keeping the temperature of the water at a constant level, one end of the thermos tank being an inlet in fluid communication with the first water line; a thermostat; a plurality of first heat collecting tanks; a plurality of second heat collecting tanks; a pump for pumping water to the first heat collecting tanks through the first water line; and a drive controller; wherein one of the first heat collecting tanks adjacent to the compressor has the refrigerant line passing therethrough, two ports, at opposite ends of the first heat collecting tank are in fluid communication with the first water line which connects the pump through the thermos tank for forming a loop, one of the second heat collecting tanks adjacent to the condenser has the refrigerant line passing therethrough, one end of each of the second heat collecting tanks is provided as a cold water inlet, and the other end of each of the second heat collecting tanks is provided as an outlet for feeding water to the first water line through the second water line, and the drive controller is electrically connected to the compressor and the thermostat which is electrically connected to the thermos tank so as to measure the temperature of the water for determining whether to stop operation of the pump as compared to a predetermined temperature.
- 2. The apparatus as recited in claim 1, wherein one or more walls of each of the first and the second heat collecting tanks are made of a material capable of keeping the temperature of water at a constant level.
- 3. The apparatus as recited in claim 1, further comprising a hot water outlet provided in the first water line.
US Referenced Citations (8)