CN106940099B - heat pump water heater - Google Patents
heat pump water heater Download PDFInfo
- Publication number
- CN106940099B CN106940099B CN201610004814.1A CN201610004814A CN106940099B CN 106940099 B CN106940099 B CN 106940099B CN 201610004814 A CN201610004814 A CN 201610004814A CN 106940099 B CN106940099 B CN 106940099B
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- Prior art keywords
- condenser
- heat pump
- water heater
- pump water
- valve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
Abstract
The invention provides a heat pump water heater. The heat pump water heater comprises a compressor, a first condenser, an evaporator, a second condenser, a throttling device and a control device. The control device is configured to: enabling the refrigerant flowing out of the compressor to selectively enter the first condenser or the second condenser through a refrigerant pipeline; under the condition that the refrigerant flowing out of the compressor enters the first condenser, the refrigerant flowing out of the first condenser can optionally directly enter the throttling device through a refrigerant pipeline or firstly pass through the second condenser and then enter the throttling device; under the condition that the refrigerant flowing out of the compressor enters the second condenser, the refrigerant flowing out of the second condenser directly enters the throttling device through the refrigerant pipeline. The heat pump water heater can enable the heat pump water heater to have a water heating function, and can realize dehumidification in multiple modes, so that dehumidification in different modes can be used along with the change of seasons, bad experience of cold and hot discomfort caused by users is prevented, and life quality is influenced.
Description
Technical Field
The invention relates to the field of water heaters, in particular to a heat pump water heater.
Background
The heat pump water heater utilizes a specific structure to absorb heat in ambient air and is used for heating water, and the heat in the air is transferred to prepare hot water so as to achieve the effect of energy conservation, so that the heat pump water heater is widely used. In rainy seasons or areas with high humidity, rooms are easy to become places where bacteria grow, and the physical health of people is affected. Therefore, maintaining indoor dry hygiene is an important requirement in people's life. At present, a heat pump water heater and a dehumidifier are used as two independent electric appliances in most families, and respectively meet the requirements of household hot water supply and humidity control of indoor environments. Some dehumidifiable heat pump water heaters exist in the market, however, the volume of the dehumidifiable heat pump water is large, the dehumidifying inner machine is separated from the hot water outer machine, and the refrigerant pipeline is complex and is not suitable for individual families.
Disclosure of Invention
It is an object of the present invention to overcome at least one of the drawbacks of the existing heat pump water heater and to provide a novel heat pump water heater which is capable of not only producing water but also achieving multiple modes of dehumidification.
Another object of the present invention is to simplify the refrigerant piping network of the heat pump water heater.
It is a further object of the present invention to make full use of the heat remaining after the water is made.
In order to achieve at least one of the above objects, the present invention provides a heat pump water heater including a compressor. In particular, the heat pump water heater further comprises:
a first condenser configured to heat water entering the heat pump water heater;
the outlet of the evaporator is communicated with the inlet of the compressor and is configured to cool or dehumidify the air flow flowing through the evaporator;
a second condenser configured to heat a gas stream flowing therethrough;
a throttle device, the outlet of which is communicated with the inlet of the evaporator; and
a control device configured to: selectively enabling the refrigerant flowing out of the compressor to enter the first condenser or the second condenser through a refrigerant pipeline; and is also provided with
Under the condition that the refrigerant flowing out of the compressor enters the first condenser, the refrigerant flowing out of the first condenser can be selectively and directly introduced into the throttling device through a refrigerant pipeline or introduced into the throttling device after passing through the second condenser;
under the condition that the refrigerant flowing out of the compressor enters the second condenser, the refrigerant flowing out of the second condenser directly enters the throttling device through a refrigerant pipeline.
Optionally, the control device includes:
the first valve is provided with at least three connecting ports, and three of the at least three connecting ports are respectively communicated with the outlet of the compressor, one end opening of the first condenser and one end opening of the second condenser through refrigerant pipelines;
the four connecting ports of the first four-way valve are communicated with the opening at the other end of the first condenser, the opening at one end of the second condenser, the opening at the other end of the second condenser and the throttling device respectively through refrigerant pipelines; and
and a sub-control device configured to disconnect a refrigerant line between the other end opening of the first condenser and the one end opening of the second condenser when the refrigerant flowing out of the compressor enters the second condenser.
Optionally, the first valve is a three-way valve or a second four-way valve, and the fourth connection port of the second four-way valve is communicated with the inlet or the closure of the compressor through a refrigerant pipeline.
Optionally, the sub-control device is further configured to disconnect the refrigerant line between the first valve and the one end opening of the second condenser when the refrigerant flowing out of the first condenser enters the throttling device via the second condenser.
Optionally, the sub-control device includes a second valve and a third valve, where the second valve is disposed on a refrigerant pipeline between the first four-way valve and the first condenser, or disposed on a refrigerant pipeline between the first four-way valve and the one end opening of the second condenser; the third valve is arranged on a refrigerant pipeline between the first valve and the second condenser; or (b)
The sub-control device is a three-way valve, and three connectors of the sub-control device are respectively communicated with the first valve, the opening at one end of the second condenser and the first four-way valve.
Optionally, the second valve and the third valve are two-way electromagnetic valves or stop valves.
Optionally, the evaporator and the second condenser are arranged such that the air flow entering the heat pump water heater passes through the evaporator before passing through the second condenser.
Optionally, the second condenser and the evaporator are both double-folded evaporators, an
The two edges of the second condenser extending along the length direction thereof are respectively contacted or fixedly connected with the two edges of the evaporator extending along the length direction thereof.
Optionally, the heat pump water heater further comprises a water tank configured to hold water, and
the first condenser is a coiled heat exchanger and is coiled on the inner wall or the outer wall of the inner container of the water tank; or, the first condenser is a double-pipe heat exchanger and is communicated with the water tank by a circulating water pipeline.
Optionally, the heat pump water heater is an integral heat pump water heater.
The heat pump water heater has the control device, so that the heat pump water heater has a water heating function, and can realize dehumidification in multiple modes, such as summer cold air dehumidification, spring and autumn waste heat dehumidification and winter warm air dehumidification, so that dehumidification in different modes can be used along with the change of seasons, bad experience of cold and hot discomfort caused by users is prevented, and life quality is influenced.
Furthermore, the heat pump water heater adopts the two four-way valves and the two-way electromagnetic valves, so that the refrigerant pipeline network of the refrigerating system of the heat pump water heater has a simple structure and is easy to control.
Furthermore, the heat pump water heater integrates the second condenser and the evaporator, so that the heat pump water heater has compact structure and small volume, and is particularly suitable for individual families.
Furthermore, when the heat pump water heater is used for dehumidification in the spring and autumn waste heat dehumidification mode, the heat remained in the refrigerant flowing out of the first condenser can be fully utilized, and low carbon, environmental protection, energy conservation and electricity saving can be realized.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a schematic structural view of a heat pump water heater according to an embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic structural view of a heat pump water heater according to an embodiment of the present invention. As shown in fig. 1, an embodiment of the present invention provides a heat pump water heater, which may include a heat pump device and a water tank 80. The heat pump apparatus contains a refrigerant, and may include a compressor 20, a first condenser 30, a second condenser 40, a throttle device 50, an evaporator 60, and a control device. The compressor 20 may be configured to compress a gaseous refrigerant flowing therein to increase the temperature and pressure of the refrigerant. The first condenser 30 may be configured to receive the refrigerant flowing from the compressor 20, heat water entering the heat pump water heater using the refrigerant, and the hot water may be stored in the water tank 80. The second condenser 40 may be configured to receive the refrigerant from the compressor 20 or the first condenser 30, and heat the air flow passing therethrough with the refrigerant. The throttle device 50 is configured to receive the refrigerant from the first condenser 30 or the second condenser 40 and throttle and depressurize the refrigerant, and the outlet communicates with the inlet of the evaporator 60. The outlet of the evaporator 60 is in communication with the inlet of the compressor 20, and the evaporator 60 is configured to receive the refrigerant from the throttle device 50, and to cool or dehumidify the air flowing therethrough using the refrigerant.
Further, in this embodiment, the evaporator 60 and the second condenser 40 are arranged such that the air flow entering the heat pump water heater flows through the evaporator 60 and then through the second condenser 40, so that the air flow is cooled down or dehumidified and then warmed up when the refrigerant flows through both the evaporator 60 and the second condenser 40.
In particular, the control device may be configured to: the refrigerant flowing out of the compressor 20 is selectively introduced into the first condenser 30 or the second condenser 40 through a refrigerant pipe; and in the case that the refrigerant flowing out of the compressor 20 enters the first condenser 30, the refrigerant flowing out of the first condenser 30 is selectively directly entered into the throttling device 50 through a refrigerant pipe or is entered into the throttling device 50 through the second condenser 40; when the refrigerant flowing out of the compressor 20 enters the second condenser 40, the refrigerant flowing out of the second condenser 40 is directly introduced into the throttle device 50 through the refrigerant line.
In particular, the heat pump water heating device may have the following modes of operation: summer cold air dehumidification, spring and autumn waste heat dehumidification and winter warm air dehumidification.
When the cool air dehumidifies in summer, the control device causes the refrigerant to flow out of the compressor 20, make hot water through the first condenser 30, enter the throttling device 50 and the evaporator 60, reduce the temperature of the air flow flowing through the evaporator 60, remove moisture in the air flow, and return to the compressor 20 for the next cycle. When the cold air dehumidifies in summer, the second condenser 40 does not work, so that the air flow is cooled and dehumidified by the evaporator 60 and then is not heated by the second condenser 40, and the simultaneous operation of heating water and dehumidifying by cold air can be realized, so that the energy conservation, environmental protection and electricity saving can be realized.
When the waste heat dehumidification is performed in spring and autumn, the control device enables the refrigerant to flow out of the compressor 20, hot water is produced through the first condenser 30, then the refrigerant enters the second condenser 40, the throttling device 50 and the evaporator 60, the temperature of air flow flowing through the evaporator 60 is reduced, moisture in the air flow can be removed, and the air flow returns to the compressor 20 for the next circulation. When the waste heat dehumidification is performed in spring and autumn, the second condenser 40 works, so that the air flow is heated through the second condenser 40 after being cooled and dehumidified through the evaporator 60, and the purposes of simultaneously heating hot water and removing the waste heat can be achieved.
When the warm air dehumidification is performed in winter, the control device causes the refrigerant to flow out of the compressor 20, pass through the second condenser 40, the throttle device 50 and the evaporator 60, and return to the compressor 20 to perform the next cycle. The temperature of the air stream is reduced as it passes through the evaporator 60 and the moisture therein is removed and then heated by the second condenser 40 so that the temperature of the air stream is not too low. When the warm air dehumidification is performed in winter, the first condenser 30 and the water tank 80 are separated, the dehumidification system can be independently operated without hot water heating, the warm air dehumidification effect can be realized, and the system is suitable for operation in winter in a cold and cloudy region. Further, before the warm air dehumidification in winter is performed, the cold air dehumidification in summer or the waste heat dehumidification in spring and autumn can be performed first to heat the hot water in the water tank 80, so that the use requirement of the hot water is met. For example, the summer cool air dehumidification or the spring and autumn waste heat dehumidification can be performed in the midday period, and the winter warm air dehumidification can be performed in other periods.
In some embodiments of the invention, the control means comprises a first valve 71, a first four-way valve 72 and sub-control means. The first valve 71 may have at least three connection ports, and three of the at least three connection ports communicate with the outlet of the compressor 20, one end opening of the first condenser 30, and one end opening of the second condenser 40, respectively, via refrigerant lines. The four connection ports of the first four-way valve 72 are respectively communicated with the other end opening of the first condenser 30, the one end opening of the second condenser 40, the other end opening of the second condenser 40 and the throttling device 50 via refrigerant pipelines. The subcontrol device may be configured to disconnect the refrigerant line between the other end opening of the first condenser 30 and the one end opening of the second condenser 40 in the event that refrigerant exiting the compressor 20 enters the second condenser 40. Further, the sub-control device may be further configured to disconnect the refrigerant line between the first valve 71 and the one end opening of the second condenser 40 when the refrigerant flowing out of the first condenser 30 enters the throttle device 50 via the second condenser 40.
Specifically, in some embodiments, as shown in fig. 1, the first valve 71 is a second four-way valve, and the fourth connection port of the second four-way valve is connected to the inlet of the compressor 20 via a refrigerant pipeline. The sub-control means comprises a second valve 73 and a third valve 74. The second valve 73 is disposed on the refrigerant line between the first four-way valve 72 and the first condenser 30, or between the first four-way valve 72 and one end opening of the second condenser 40, preferably between the first four-way valve 72 and the first condenser 30. The third valve 74 is disposed on the refrigerant line between the first valve 71 and the second condenser 40. The second valve 73 and the third valve 74 are both two-way solenoid valves or shut-off valves. The two four-way valves and the two-way electromagnetic valves are adopted, so that the refrigerant pipeline network system has a simple structure and is convenient to control.
For example, when the summer cool air dehumidification is performed, the first valve 71 (i.e., the second four-way valve) turns on the compressor 20 and the first condenser 30, the second valve 73 turns on, the first four-way valve 72 turns on the first condenser 30 and the throttle device 50, and the third valve 74 may be closed. When the waste heat dehumidification is performed in spring and autumn, the first valve 71 (i.e. the second four-way valve) is used for conducting the compressor 20 and the first condenser 30, the second valve 73 is used for conducting the first four-way valve 72 is used for conducting the first condenser 30 and the second condenser 40, meanwhile, the second condenser 40 and the throttling device 50 are conducted, and the third valve 74 can be closed. When the warm air dehumidification is performed in winter, the first valve 71 (i.e., the second four-way valve) is turned on to connect the compressor 20 and the second condenser 40, the third valve 74 is turned on, the first four-way valve 72 is turned on to connect the second condenser 30 and the throttle device 50, and the second valve 73 is closed.
In some alternative embodiments, the first valve 71 may be a three-way valve, or the first valve 71 may be a second four-way valve with a fourth connection port closed. In this case, the sub-control device may be provided with only the second valve 73, and of course, the sub-control device may also include the second valve 73 and the third valve 74.
In other alternative embodiments, the sub-control device may also be a three-way valve, and the three connection ports thereof are respectively connected to the first valve 71, one end opening of the second condenser 40, and the first four-way valve 72.
In some embodiments of the present invention, the second condenser 40 and the evaporator 60 are both double-folded evaporators 60, and both edges of the second condenser 40 extending in the length direction thereof are respectively in contact with or fixedly connected with both edges of the evaporator 60 extending in the length direction thereof. The second condenser 40 and the evaporator 60 may be also referred to as a diamond heat exchanger, which makes the heat pump water heater compact and small in size, and facilitates the temperature rise after dehumidification of the air flow.
In some embodiments of the invention, the heat pump water heater is a unitary heat pump water heater, such as a unitary wall-mounted heat pump water heater, a unitary mobile heat pump water heater, or the like. The first condenser 30 is a coil heat exchanger and is coiled on the inner wall or the outer wall of the inner container of the water tank 80. The water tank 80 is disposed in a horizontal lateral direction, and the second condenser 40 and the evaporator 60 are disposed outside one end of the water tank 80. The use of the spring and autumn waste heat dehumidification mode can solve the problems that the high-temperature gasification refrigerant cannot be completely condensed and a large amount of residual heat is wasted because hot water in the water tank 80 is not cooled and layered to a large extent. In some alternative embodiments of the present invention, the first condenser 30 is a double pipe heat exchanger, which may be in communication with the water tank 80 using a circulating water line.
In some embodiments of the invention, the restriction 50 may be a capillary tube, or the restriction 50 may include a capillary tube and two filters upstream and downstream of the capillary tube.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.
Claims (9)
1. A heat pump water heater comprising a compressor, further comprising:
a first condenser configured to heat water entering the heat pump water heater;
the outlet of the evaporator is communicated with the inlet of the compressor and is configured to cool or dehumidify the air flow flowing through the evaporator;
a second condenser configured to heat a gas stream flowing therethrough;
a throttle device, the outlet of which is communicated with the inlet of the evaporator; and
a control device configured to: selectively enabling the refrigerant flowing out of the compressor to enter the first condenser or the second condenser through a refrigerant pipeline; and is also provided with
Under the condition that the refrigerant flowing out of the compressor enters the first condenser, the refrigerant flowing out of the first condenser can be selectively and directly introduced into the throttling device through a refrigerant pipeline or introduced into the throttling device after passing through the second condenser;
under the condition that the refrigerant flowing out of the compressor enters the second condenser, the refrigerant flowing out of the second condenser directly enters the throttling device through a refrigerant pipeline;
the evaporator and the second condenser are arranged such that an air flow entering the heat pump water heater flows through the evaporator and then through the second condenser;
the heat pump water heater integrates the second condenser and the evaporator.
2. The heat pump water heater of claim 1, wherein the control means comprises:
the first valve is provided with at least three connecting ports, and three of the at least three connecting ports are respectively communicated with the outlet of the compressor, one end opening of the first condenser and one end opening of the second condenser through refrigerant pipelines;
the four connecting ports of the first four-way valve are communicated with the opening at the other end of the first condenser, the opening at one end of the second condenser, the opening at the other end of the second condenser and the throttling device respectively through refrigerant pipelines; and
and a sub-control device configured to disconnect a refrigerant line between the other end opening of the first condenser and the one end opening of the second condenser when the refrigerant flowing out of the compressor enters the second condenser.
3. The heat pump water heater of claim 2, wherein,
the first valve is a three-way valve or a second four-way valve, and a fourth connecting port of the second four-way valve is communicated with an inlet or a seal of the compressor through a refrigerant pipeline.
4. The heat pump water heater of claim 2, wherein,
the sub-control device is further configured to disconnect a refrigerant line between the first valve and the one end opening of the second condenser when refrigerant flowing out of the first condenser enters the throttle device via the second condenser.
5. The heat pump water heater of claim 4, wherein,
the sub-control device comprises a second valve and a third valve, wherein the second valve is arranged on a refrigerant pipeline between the first four-way valve and the first condenser or arranged on the refrigerant pipeline between the first four-way valve and the one end opening of the second condenser; the third valve is arranged on a refrigerant pipeline between the first valve and the second condenser; or (b)
The sub-control device is a three-way valve, and three connectors of the sub-control device are respectively communicated with the first valve, the opening at one end of the second condenser and the first four-way valve.
6. The heat pump water heater of claim 5, wherein,
the second valve and the third valve are two-way electromagnetic valves or stop valves.
7. The heat pump water heater of claim 1, wherein,
the second condenser and the evaporator are double-folded evaporators, and
the two edges of the second condenser extending along the length direction thereof are respectively contacted or fixedly connected with the two edges of the evaporator extending along the length direction thereof.
8. The heat pump water heater of claim 1, further comprising:
a water tank configured to hold water, an
The first condenser is a coiled heat exchanger and is coiled on the inner wall or the outer wall of the inner container of the water tank; or (b)
The first condenser is a double-pipe heat exchanger and is communicated with the water tank by a circulating water pipeline.
9. The heat pump water heater of claim 1, wherein,
the heat pump water heater is an integral heat pump water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004814.1A CN106940099B (en) | 2016-01-05 | 2016-01-05 | heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610004814.1A CN106940099B (en) | 2016-01-05 | 2016-01-05 | heat pump water heater |
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| Publication Number | Publication Date |
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| CN106940099A CN106940099A (en) | 2017-07-11 |
| CN106940099B true CN106940099B (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610004814.1A Active CN106940099B (en) | 2016-01-05 | 2016-01-05 | heat pump water heater |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050028545A1 (en) * | 1998-10-08 | 2005-02-10 | Hebert Thomas H. | Building exhaust and air conditioner condensate (and/or other water source) evaporative refrigerant subcool/precool system and method therefor |
| CN2711616Y (en) * | 2004-07-25 | 2005-07-20 | 熊晓强 | Integrated dehumidifier |
| JP2005257231A (en) * | 2004-03-15 | 2005-09-22 | Fujitsu General Ltd | Heat pump hot water supply air conditioner |
| WO2011104834A1 (en) * | 2010-02-24 | 2011-09-01 | 株式会社 日立製作所 | Air conditioner |
| CN102937308A (en) * | 2012-11-14 | 2013-02-20 | 合肥天鹅制冷科技有限公司 | Dehumidification air conditioner capable of supplying air with multiple temperature parameters |
| CN205448388U (en) * | 2016-01-05 | 2016-08-10 | 青岛海尔新能源电器有限公司 | Heat -pump water heater |
-
2016
- 2016-01-05 CN CN201610004814.1A patent/CN106940099B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050028545A1 (en) * | 1998-10-08 | 2005-02-10 | Hebert Thomas H. | Building exhaust and air conditioner condensate (and/or other water source) evaporative refrigerant subcool/precool system and method therefor |
| JP2005257231A (en) * | 2004-03-15 | 2005-09-22 | Fujitsu General Ltd | Heat pump hot water supply air conditioner |
| CN2711616Y (en) * | 2004-07-25 | 2005-07-20 | 熊晓强 | Integrated dehumidifier |
| WO2011104834A1 (en) * | 2010-02-24 | 2011-09-01 | 株式会社 日立製作所 | Air conditioner |
| CN102937308A (en) * | 2012-11-14 | 2013-02-20 | 合肥天鹅制冷科技有限公司 | Dehumidification air conditioner capable of supplying air with multiple temperature parameters |
| CN205448388U (en) * | 2016-01-05 | 2016-08-10 | 青岛海尔新能源电器有限公司 | Heat -pump water heater |
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| CN106940099A (en) | 2017-07-11 |
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