Patent Grant
9347464
This application is the U.S. National Phase Application of PCT International Application No. PCT/CN2011/000207, filed Feb. 10, 2011, the contents of such applications being incorporated by reference herein.
The present invention relates to a heating and ventilation fan for a bathroom, and in particular, to an air leakage-preventing structure for a heating and ventilation fan for a bathroom.
As shown in
Since selection of the above functions should be performed by rotation of the air passage-switching plate 150, a certain gap 180 between the air passage-switching plate 150 and the air passage wall 170 should be ensured, and thus the air passage-switching plate 150 can be smoothly rotated. In this way, when the heating and ventilation fan 100 is operated, a small amount of the air is blown into the gap 180, causing lost of air volume and generation of noise. However, if the gap 180 between the air passage-switching plate 150 and the surrounding air passage wall 170 is too small, the small gap will cause noise when the air is blow into the gap or the air passage-switching plate 150 can not be smoothly rotated during operation of the heating and ventilation fan.
Accordingly, it is desired to provide a heating and ventilation fan for a bathroom which is capable of reducing noise.
In order to achieve the above object, the heating and ventilation fan for a bathroom according to the present invention is an ventilation fan for a bathroom, comprising an ventilation fan frame, a scroll casing provided with fan blades and a motor, an air passage-switching plate provided downstream of an air outlet of the scroll casing and configured to switch air passages directed in at least two directions, and a heater. An air leakage-preventing structure is provided at the air outlet of the scroll casing to direct the air to an inside of the air passage-switching plate.
The air leakage-preventing structure comprises a protrusion piece configured to protrude from the air outlet of the scroll casing to the inside of the air passage-switching plate, and the air passage-switching plate has a rotation piece configured to overlap with the outer side of the protrusion piece.
An air passage wall forming an air passage extends from the air outlet of the scroll casing, and the protrusion piece and the air passage wall forming the air passage form a gap for receiving the rotation piece of the air passage-switching plate downstream of the air outlet of the scroll casing
The protrusion piece is provided at the periphery of the whole air outlet of the scroll casing.
The protrusion piece is protruded from a position higher than the position at which a rotation shaft, passing across the air outlet of the scroll casing, of the air passage-switching plate is located.
The protrusion piece is protruded from a position lower than the position at which a rotation shaft, passing across the air outlet of the scroll casing, of the air passage-switching plate is located.
The air leakage-preventing structure comprises protruding structures provided on the air passage-switching plate and on the air passage wall forming the air passage and operable to be engaged with each other.
The protruding structures comprise protrusions provided on the left and right sides of the air passage-switching plate and of the air passage wall, respectively, and the protrusions on the air passage-switching plate and the protrusions on the air passage wall can be engaged with each other.
The protrusions of the air passage-switching plate comprise a first air passage-switching plate protrusion and a second air passage-switching plate protrusion provided on side plates of the air passage-switching plate adjoining the air passage wall, respectively, and the protrusions of the air passage wall comprise a first air passage wall protrusion provided at the middle of the air passage wall.
The protrusions of the air passage-switching plate comprise a third air passage-switching plate protrusion and a fourth air passage-switching plate protrusion provided on a front end portion and a rear end portion of the air passage-switching plate adjoining the air passage wall, respectively, and the protrusions of the air passage wall comprise a second air passage wall protrusion provided at the middle of the air passage wall on the air outlet side.
A third air passage wall protrusion is provided on a top surface side of the air passage wall, and the lowest point of the third air passage-switching plate protrusion is higher than the lowest point of the third air passage wall protrusion.
The advantage of the present invention is that a desired air volume can be ensured and a noise can be reduced while guaranteeing a gap required for smooth rotation of the air passage-switching plate.
Further, the present invention comprises the following structures:
a control unit for controlling the motor, the heater, and the air passage-switching plate and a sensor for detecting the position of the air passage-switching plate and sending a signal to the control unit are provided.
The sensor comprises a first body-side sensing element provided on the side face of the air passage wall of the scroll casing and a first air passage switching plate-side sensed element provided outside of a rotation piece of the air passage-switching plate and provided at a position corresponding to the position of the first body-side sensing element.
The first body-side sensing element is provided to correspond to movable limit points of the first air passage switching plate-side sensed elements moved along with the air passage-switching plate.
The sensor comprises a second body-side sensing element provided on the top portion of the air passage wall of the scroll casing and a second air passage switching plate-side sensed element provided outside of a rotation piece of the air passage-switching plate and located at a position corresponding to the position of the second body-side sensing element.
The sensor comprises a third body-side sensing element provided on the bottom portion of the air passage wall of the scroll casing and a third air passage switching plate-side sensed element provided outside of a rotation piece of the air passage-switching plate and located at a position corresponding to the position of the third body-side sensing element.
The first, second, and third body-side sensing elements are magnetic sensors, and the first, second, and third air passage switching plate-side sensed elements are magnets.
The magnetic sensors are electromagnets.
With the above structure, a necessary space required for smooth rotation of the air passage-switching plate and a desired air volume can be ensured and a noise can be reduced. Furthermore, since the position of the air passage-switching plate can be detected by the sensor, in a case where the position of the air passage-switching plate offsets from the normal position due to external factors during the heating operation or the air-exchanging operation, the control unit can be used to correct the position of the air passage-switching plate.
With reference to
As shown in
The air leakage-preventing structure shown in
As shown in
An air passage wall 170 for forming the air passages extends from the air outlet 132 of the scroll casing 131 to the indoor air outlet 112, through which the air is blown toward the indoor, and the air outlet 111 of the ventilation fan. There is a certain gap 190 downstream of the air outlet 132 of the scroll casing 131 between the protrusion piece 200 and the air passage wall 170. The gap 190 receives the rotation piece 155 of the air passage-switching plate 150.
The protrusion piece 200 protrudes from the periphery of the whole air outlet 132 toward an inside of the air passage to form a “□” shape. The “□” shape is divided by the rotation shaft 151 of the air passage-switching plate 150 as a boundary into an upper portion and a lower portion, of which the portion close to the top surface 134 of the scroll casing 131 is the upper portion 210 of the protrusion piece 200, and the portion close to the bottom surface 135 of the scroll casing 131 is the lower portion 220 of the protrusion piece 200.
The heating and ventilation fan 100 for a bathroom realizes selection among a heating function, an air-exchanging function and a drying function of the heating and ventilation fan 100 by controlling a rotation position of the air passage-switching plate 150.
With reference to
That is to say, the protrusion piece 200 is provided downstream of the scroll casing 131, and the outer side of the protrusion piece 200 and the air passage-switching plate 150 overlap with each other to form a receiving structure, so that the air blown out of the scroll casing 131 will not leak to outside of the air passage-switching plate 150 but will be guided into the air passage-switching plate 150. Finally, the air can flow to one of the two air passages from the air outlet 132 to the indoor air outlet 112 through which air is blown toward the indoor.
With reference to
That is to say, the protrusion piece 200 is provided downstream of the scroll casing 131, and the outer side of the protrusion piece 200 and the lower portion 220 of the air passage-switching plate 150 overlap with each other to form a receiving structure, so that the air blown out of the scroll casing 131 will not leak to outside of the air passage-switching plate 150 but will be guided into the air passage-switching plate 150. Finally, the air can flows to one of the two air passages from the air outlet 132 to the air outlet 111 of the ventilation fan.
As described above, when the air passage-switching plate 150 is rotated, there is a gap between the air passage wall 170 and the portions, contacting with the air passage wall 170, of the air passage-switching plate 15. By providing an air leakage-preventing structure, i.e., the protrusion piece 200 in a “□” shape, between the air outlet 132 of the scroll casing 131 and the air passages to cover the gap between the air passage-switching plate 150 and the air passage wall 170 from an upstream side of the air flow, the air can be prevented from being blown into the gap between the air passage-switching plate 150 and the air passage wall 170, so that generation of noise and undesired rotation of the air passage-switching plate 150 can be prevented and the desired air volume can be ensured. In this way, performance of products and utilization efficiency of energy can be improved.
The protrusion piece 300 is provided at an upper location than the rotation shaft 151 of the air passage-switching plate 150 for the air outlet 132 of the scroll casing 131, i.e., forming an inverse “U” shape.
At a certain rotation position, the side plates 154 on the two sides of the air passage-switching plate 150 and a front end portion 1521 of the main plate 152 are received by the gap 290 formed between the outer side of the protrusion piece 300 and the air passage wall 170.
With reference to
That is to say, the protrusion piece 300 protrudes toward the downstream side of the scroll casing 131, and the outer side of the protrusion piece 300 and the air passage-switching plate 150 overlap with each other to form a receiving structure, so that the air blown out of the scroll casing 131 will not leak out and will be guided into the air passage-switching plate 150. Finally, the air can flow to one of the two air passages from the air outlet 132 to the indoor air outlet 112 through which air is blown toward the indoor. In this way, performance of products and utilization efficiency of energy can be improved.
The protrusion piece 400 is provided at a lower location than the rotation shaft 151 of the air passage-switching plate 150 for the air outlet 132 of the scroll casing 131, i.e., forming a “U” shape.
At a certain rotation position, the air passage-switching plate 150 is received by the gap 390 formed between the outer side of the protrusion piece 400 and the air passage wall 170.
With reference to
That is to say, the protrusion piece 400 is provided to protrude toward the downstream side of the scroll casing 131, and the outer side of the protrusion piece 400 and the air passage-switching plate 150 overlap with each other to form a receiving structure, so that the air blown out of the scroll casing 131 will not leak out and will be guided into the air passage-switching plate 150. Finally, the air can flow to one of the two air passages from the air outlet 132 to the air outlet 111 of the ventilation fan. In this way, performance of products and utilization efficiency of energy can be improved.
The air passage wall 170 is provided with first air passage wall protrusions 171 at the middle positions on the left side and the right side 176 thereof, respectively. That is to say, the first air passage wall protrusions 171 are provided along a line from the rotation shaft 151 of the air passage-switching plate 150 to the lower end of the air outlet 111. Furthermore, the first air passage wall protrusions 171 are located between the first air passage-switching plate protrusion 161 and the second air passage-switching plate protrusion 162.
When the heating and ventilation fan 100 is operated in the air-exchanging mode or in the heating mode, the position of the air passage-switching plate 150 is set to separate the air passage from the air outlet 132 to the air outlet 111 of the ventilation fan provided on the side wall of the ventilation fan frame 110 from the air passage from the air outlet 132 to the indoor air outlet 112 provided at the hood and through which air is blown toward the indoor, by means of protruding structures formed by superposing the first air passage-switching plate protrusion 161 of the air passage-switching plate 150 and the first air passage wall protrusion 171 of the air passage wall 170 on each other and engaging the first air passage-switching plate protrusion 161 with the first air passage wall protrusion 171, or formed by superposing the second air passage-switching plate protrusion 162 and the first air passage wall protrusion 171 on each other and engaging the second air passage-switching plate protrusion 162 with the first air passage wall protrusion 171, so that the air can be prevented from directly flowing toward outside of the air passage-switching plate 150 from the gap between the air passage-switching plate 150 and the air passage wall 170.
The detailed description is provided as follows.
With reference to
With reference to
When the heating and ventilation fan is operated in the air-exchanging mode or in the heating mode, the air can be prevented from directly flowing toward outside of the air passage-switching plate 150 from the gap between the air passage-switching plate 150 and the air passage wall 170 by superposing the third air passage-switching plate protrusion 164 of the air passage-switching plate 150 and the second air passage wall protrusion 186 of the air passage wall 170 on each other and engaging the third air passage-switching plate protrusion 164 with the second air passage wall protrusion 186, or by superposing the fourth air passage-switching plate protrusion 165 and the second air passage wall protrusion 186 on each other and engaging the fourth air passage-switching plate protrusion 165 with the second air passage wall protrusion 186.
The detailed description is provided as follows.
With reference to
With reference to
With reference to
When the heating and ventilation fan 100 is operated in a heating mode, the air passage-switching plate 150 is rotated to the top surface 134 side of the scroll casing 131 by control of a step motor. At this point, the third air passage-switching plate protrusion 164 on the front end portion 1521 of the air passage-switching plate 150 engages with the rear side 1771 of the third air passage wall protrusion 177, and the fourth air passage-switching plate protrusion 165 on the rear end portion 1522 of the air passage-switching plate 150 engages with the second air passage wall protrusion 186 of the air passage wall 170, so that a tight engagement state is formed. Moreover, as described above, the front side 1772 of the “V”-shaped third air passage wall protrusion 177 forms hypotenuse of the right triangle, that is, the front side 1772 also serves as a guiding plate to direct the air blown out from the air outlet side to the inside of the air passage-switching plate 150. Therefore, with the “V”-shaped third air passage wall protrusion 177, not only the air can be prevented from directly flowing toward outside of the air passage-switching plate 150 from the gap between the air passage-switching plate 150 and the air passage wall 170, but also the resistance to the air flow can be reduced and a performance can be enhanced. In this way, product performance and utilization efficiency of energy can be improved.
The sixth embodiment of the present invention is based on the above second embodiment. On the basis of the above second embodiment provided with the protrusion piece 300 as the air leakage-preventing structure, the sixth embodiment of the present invention further comprises a control unit for controlling the motor 130, the heater 140, and the air passage-switching plate 150, and a sensor for detecting the position of the air passage-switching plate 150 and sending signals to the above control unit.
During the heating operation or the air-exchanging operation, the sensor detects the position of the air passage-switching plate 150 and sends the position signals to the control unit. In a case where the position of the air passage-switching plate 150 offsets from the normal position, the control unit controls the step motor according to the position signals to rotate the air passage-switching plate to the normal position.
Since the position of the air passage-switching plate 150 can be detected, the control unit can correct the position of the air passage-switching plate 150 if the position of the air passage-switching plate 150 offsets from the normal position due to external factors during the heating operation or the air-exchanging operation.
Therefore, with the air leakage-preventing structure of the present invention, not only the air can be certainly directed into the air passage-switching plate 150, but also the air leakage caused by offset of the position of the air passage-switching plate 150 can be prevented.
Further, the sensor comprises a first body-side sensing element provided on the side face of the air passage wall 170 of the scroll casing 131 and a first air passage switching plate-side sensed element provided outside of the side plate 154 of the rotation piece 155 of the air passage-switching plate 150 and provided at a position corresponding to the position of the first body-side sensing element.
As shown in
As shown in
The first body-side sensing elements 0011, 0012 provided at the two positions on the side face of the air passage wall 170 are provided to correspond to movable limit points of the first air passage switching plate-side sensed element 551 moved along with the air passage-switching plate 150.
That is to say, the position of the first body-side sensing element 0011 on one side of the air passage wall 170 corresponds to the position of the first air passage switching plate-side sensed element 551 on the air passage-switching plate side in the heating mode. In other words, when the air passage-switching plate 150 is rotated to the top surface 134 side of the scroll casing 131, the first air passage switching plate-side sensed element 551 provided on the upper portion of the end surface of the side plate 154 of the air passage-switching plate 150 is rotated along with the air passage-switching plate 150, and the first body-side sensing element 0011 and the first air passage switching plate-side sensed element 551 in a state of reaching the upper limit point are disposed along a direction radially extending from the rotation shaft 151 and opposite to each other.
Further, as shown in
As described above, since the first body-side sensing elements 0011, 0012 provided at two positions on the side face of the air passage wall 170 are provided to correspond to the upper and lower movable limit points of the air passage switching plate-side sensed element 551, in the heating mode, when, along with rotation of the side plate 154 of the air passage-switching plate 150, the first air passage switching plate-side sensed element 551 moves up to the upper movable limit point, the normal position of the air passage-switching plate 150 operated in the heating mode is detected by means of the first body-side sensing element 0011 disposed on one side and corresponding to the upper limit point,
In the air-exchanging mode, when, along with rotation of the side plate 154 of the air passage-switching plate 150, the first air passage switching plate-side sensed element 551 moves up to the lower movable limit point, the normal position of the air passage-switching plate 150 operated in the air-exchanging mode is detected by means of the first body-side sensing element 0012 disposed on the other side and corresponding to the lower limit point.
The control unit sends a signal to the step motor according to this position signal and controls rotation of the air passage-switching plate 150.
Further, the first air passage switching plate-side sensed element 551 is disposed along a direction radially extending from the rotation shaft 151 and is provided on separated locations, like a flange on the upper portion of the end surfaces of the side plates 154. If the first body-side sensing elements 0011, 0012 provided at two positions on the side face of the air passage wall 170 are disposed along a direction radially extending from the rotation shaft 15 and are provided on the separated locations, since the first body-side sensing element 0011 and the second body-side sensing element 0012 are distant from each other and will not interfere with each other when detecting the first air passage switching plate-side sensed element 551, the first air passage switching plate-side sensed element 551 can be stably detected by the first body-side sensing elements 0011, 0012.
By use of the non-contact axially-sensing operation performed by the first body-side sensing elements 0011, 0012 provided at the two positions on the side face of the air passage wall 170 and the first air passage switching plate-side sensed element 551 provided on the side plate 154 of the air passage-switching plate 150, the position of the air passage-switching plate 150 can be detected.
Since the normal position of the air passage-switching plate 150 during the drying operation and the air-exchanging operation can be accurately detected, if the position of the air passage-switching plate 150 offsets from the normal position due to the outer factors during the heating operation or the air-exchanging operation, the control unit can correct the position of the air passage-switching plate 150.
Therefore, with the air leakage-preventing structure of the present invention, not only the air can be certainly directed into the air passage-switching plate 150, but also the air leakage caused by offset of the position of the air passage-switching plate 150 can be prevented.
By use of the non-contact radially-sensing operation performed by the second body-side sensing element 0021 provided on the inside of the top portion of the air passage wall 170 and the second air passage switching plate-side sensed element 552 provided on the front end portion 1521 of the air passage-switching plate 150, the normal position of the air passage-switching plate during the heating operation can be detected.
That is to say, the position of the air passage-switching plate 150 in the heating mode is such arranged that when the air passage-switching plate 150 is rotated to the top 134 side of the scroll casing 131, the second body-side sensing element 0021 and the second air passage switching plate-side sensed element 552 provided on the front end portion 1521 of the air passage-switching plate 150 are disposed along two opposite directions.
The second body-side sensing element 0021 and the second air passage switching plate-side sensed element 552 may be provided at any position on the inside surface of the top portion of the air passage wall 170 and at any position on the outside surface of the front end portion 1521 of the air passage-switching plate 150, respectively. The two elements are disposed along two opposite directions when being in the heating mode.
The control unit sends a signal to the step motor according to the position signal from the second body-side sensing element 0021 and the second air passage switching plate-side sensed element 552 and controls rotation of the air passage-switching plate.
In a case where the position of the air passage-switching plate 150 offsets from the normal position due to the outer factors during the heating operation, the control unit can correct the position of the air passage-switching plate 150.
Therefore, with the air leakage-preventing structure of the present invention, not only the air can be certainly directed into the air passage-switching plate 150, but also the air leakage caused by offset of the position of the air passage-switching plate 150 can be effectively prevented.
By use of the non-contact radially-sensing operation performed by the third body-side sensing element 0031 provided on the inside of the bottom portion of the air passage wall 170 and the third air passage switching plate-side sensed element 553 provided on the rear end portion 1522 of the air passage-switching plate 150, the normal position of the air passage-switching plate during the air-exchanging operation can be detected.
That is to say, the position of the air passage-switching plate 150 in the air-exchanging mode is such arranged that when the air passage-switching plate 150 is rotated to the bottom 135 side of the scroll casing 131, the third body-side sensing element 0031 and the third air passage switching plate-side sensed element 553 provided on the rear end portion 1522 of the air passage-switching plate 150 are disposed along two opposite directions.
The third body-side sensing element 0031 and the third air passage switching plate-side sensed element 553 may be provided at any position on the inside surface of the bottom portion of the air passage wall 170 and at any position on the outside surface of the rear end portion 1522 of the air passage-switching plate 150, respectively. The two elements are disposed along two opposite directions when being in the air-exchanging mode.
The control unit sends a signal to the step motor according to the position signal from the third body-side sensing element 0031 and the third air passage switching plate-side sensed element 553 and controls rotation of the air passage-switching plate.
The normal position of the air passage-switching plate 150 during the air-exchanging operation can be accurately detected.
In a case where the position of the air passage-switching plate 150 offsets from the normal position due to the outer factors during the air-exchanging operation, the control unit can correct the position of the air passage-switching plate 150.
Therefore, with the air leakage-preventing structure of the present invention, not only the air can be certainly directed into the air passage-switching plate 150, but also the air leakage caused by offset of the position of the air passage-switching plate 150 can be effectively prevented.
Further, the first, second, and third body-side sensing elements may be magnetic sensors, and the first, second, and third air passage switching plate-side sensed elements may be magnets.
The first body-side sensing element, the second body-side sensing element, and the third body-side sensing element are hole elements in the magnetic sensors. Moreover, the first, second, and third air passage switching plate-side sensed elements are magnets.
With rotation of the air passage-switching plate 150, when the first, second, and third air passage switching plate-side sensed elements enter into the detection range of the first, second, and third body-side sensing element, the magnetic sensor can detect a magnetic field generated by the magnet.
The first, second, and third body-side sensing elements may be magnetic sensors using hole elements. If magnets are used as the first, second, and third air passage switching plate-side sensed elements, the first, second, and third air passage switching plate-side sensed elements are non-contacting compared with a mechanical switch and may facilitate miniaturization of the sensor.
Further, the above described magnetic sensor (the first, second, and third body-side sensing elements) may be an electromagnet.
That is, the first, second, and third body-side sensing elements may be electromagnets.
With rotation of the air passage-switching plate 150, when the first, second, and third air passage switching plate-side sensed elements enter into the detection range of the first, second, and third body-side sensing elements, the magnetic field of the magnet will change, and the coil of the electromagnet will generate a voltage.
During the air-exchanging operation or the heating operation, when the control unit controls the step motor to rotate the air passage-switching plate, the first, second, and third body-side sensing elements first detect that the magnets (the first, second, and third air passage switching plate-side sensed elements) enter into the detection range of the electromagnet. Then, the magnetic sensors on the body side for the electromagnet (the first, second, and third body-side sensing elements) are switched on and the air passage-switching plate 150 is rotated to the vicinity of the normal position during the air-exchanging operation or the heating operation. The magnetic sensors on the body side (the first body-side sensing element, the second body-side sensing element) will attract the magnets on the air passage-switching plate 150 side (the first air passage switching plate-side sensed element and the second air passage switching plate-side sensed element).
The air passage-switching plate 150 can be ensured to be retained in the normal position during the heating operation and the air-exchanging operation. If the position of the air passage-switching plate 150 offsets from the normal position, the position of the air passage-switching plate 150 can be adjusted to the normal position and then be locked.
Further, the air leakage-preventing structure according to the sixth embodiment is a structure having the protrusion piece 300 of the second embodiment, or an embodying form of any one of the first embodiment, the second embodiment, and the fifth embodiment in combination of the air leakage-preventing structure. With the control unit and the sensor according to the sixth embodiment and the air leakage-preventing structure according to the embodiments, not only the air can be certainly directed into the air passage-switching plate 150, but also the air leakage caused by position offset of the air passage-switching plate 150 toward the air-exchanging position side due to the self weight thereof during the heating operation can be effectively prevented and the air leakage caused by position offset of the air passage-switching plate 150 due to the air pressure during the air-exchanging operation can be effectively prevented.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2010 1 0127188 | Mar 2010 | CN | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/CN2011/000207 | 2/10/2011 | WO | 00 | 8/14/2012 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2011/113296 | 9/22/2011 | WO | A |
| Number | Name | Date | Kind |
|---|---|---|---|
| 5839879 | Kameoka et al. | Nov 1998 | A |
| 20090275280 | Liang et al. | Nov 2009 | A1 |
| Number | Date | Country |
|---|---|---|
| 101576095 | Nov 2009 | CN |
| 07171299 | Jul 1995 | JP |
| 9-250787 | Sep 1997 | JP |
| 9250787 | Sep 1997 | JP |
| 10-073294 | Mar 1998 | JP |
| 2003-279116 | Oct 2003 | JP |
| 2004003722 | Jan 2004 | JP |
| 2004301481 | Oct 2004 | JP |
| 2010-054077 | Mar 2010 | JP |
| Entry |
|---|
| Koyabu, Koichi; Bathroom Ventilating Dryer; Jul. 11, 1995; Machine translation of JP 07-171299 “Bathroom Ventilating Dryer”. |
| Kurashima et al; Bathroom Drier; Jan. 8, 2004; Machine Translation of JP 2004-003722 “Bathroom Drier”. |
| Ishikawa et al; Bathroom Ventilation and Drying Device; Oct. 28, 2004; English Abstract of JP 2004-301481 “Bathroom Ventilation and Drying Device”. |
| Hirohiko et al; Bathroom Ventilating Dryer; Sep. 22, 1997; Machine Translation of JP 9-250787 “Bathroom Ventilating Dryer”. |
| International Search Report corresponding to International Application No. PCT/CN2011/000207, dated May 19, 2011. |
| Chinese First Office Action with English Translation, dated Sep. 28, 2012. |
| Chinese Second Office Action with English Translation, dated Apr. 2, 2013. |
| Number | Date | Country | |
|---|---|---|---|
| 20130004299 A1 | Jan 2013 | US |
