CN106996643A - A kind of multifunctional heat pump water heating machine group - Google Patents
A kind of multifunctional heat pump water heating machine group Download PDFInfo
- Publication number
- CN106996643A CN106996643A CN201710368017.6A CN201710368017A CN106996643A CN 106996643 A CN106996643 A CN 106996643A CN 201710368017 A CN201710368017 A CN 201710368017A CN 106996643 A CN106996643 A CN 106996643A
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- CN
- China
- Prior art keywords
- valve
- heat exchanger
- electric expansion
- interfaces
- magnetic valve
- Prior art date
- 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
- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a kind of multifunctional heat pump water heating machine group, belong to water heater arrangement field, the blast pipe of compressor and the A interfaces of triple valve are connected, the B interface of triple valve and the d interfaces of four-way valve are connected, the c interfaces of four-way valve are connected with First Heat Exchanger, the other end of First Heat Exchanger is connected with first magnetic valve one end, pressure pan is installed on the pipeline between First Heat Exchanger and the first magnetic valve, the other end of first magnetic valve point two-way, the first electric expansion valve is connect all the way, another road connects the second electric expansion valve, the heat exchanger of another termination second of first electric expansion valve, the e interfaces of another termination four-way valve of second heat exchanger, the import of the s interfaces and gas-liquid separator of four-way valve and one end connection of the second magnetic valve, the outlet of gas-liquid separator connects the gas returning port of compressor, the heat exchanger of another termination the 3rd of second electric expansion valve, the other end of 3rd heat exchanger is connected with the other end of the second magnetic valve and the C interface of triple valve.The present invention can adapt to the different demands such as cold and hot and hot water, realize that comprehensive frigiopyretic dysentery is used, while solving the problem of defrosting reliability in different modes.
Description
Art
The present invention relates to water heater arrangement field, belong to home appliance technical field, relate in particular to refrigeration air conditioner,
Teat pump boiler and field of energy-saving technology.
Background technology
Existing heat pump air-conditioning hot water group has the conversion come with double four-way valves between control model, such as publication No.
CN101788208A patent, although a variety of function switchings can be realized, but must but pass through water refrigerant in defrosting operating condition
, easily there is defrost not clean or water route lockout risk if anhydrous when defrost or water temperature is very low in heat exchanger；Also useful one four
Port valve adds a triple valve to realize what is switched between multi-mode, such as publication No. CN102313326A patent, but the patent except
During frost circulation, it is necessary to from indoor heat absorption, also to be absorbed heat even if heating under water condition from indoor, now there is pattern switching and lead
Amount of the refrigeration matchmaker in each heat exchanger or pipeline is different and has influence on defrosting effect.
The content of the invention
The present invention enters into market for multifunctional heat pump water heating machine group, is played a role in energy-conservation, it is necessary to overcome its existing
The above-mentioned deficiency of technology, multifunction water-heating unit proposed by the present invention will optimize structure, improve the reliability of pattern switching, more
Defrost effect is improved well.
The present invention is achieved in that a kind of multifunctional heat pump water heating machine group, including compressor 1, triple valve 2, four-way valve
3rd, First Heat Exchanger 4, pressure pan 5, the first magnetic valve 6, the first electric expansion valve 7, the second heat exchanger 8, gas-liquid separator 9,
Two electric expansion valves 10, the 3rd heat exchanger 11, the second magnetic valve 12 and blower fan 13, the blast pipe of the compressor and triple valve
A interfaces are connected, and the B interface of triple valve and the d interfaces of four-way valve are connected, and the c interfaces of four-way valve are connected with First Heat Exchanger, and first
The other end of heat exchanger is connected with first magnetic valve one end, and pressure pan is installed on the pipeline between First Heat Exchanger and the first magnetic valve
On, the other end point two-way of the first magnetic valve connects the first electric expansion valve, another road connects the second electric expansion valve, first all the way
The heat exchanger of another termination second of electric expansion valve, the e interfaces of another termination four-way valve of the second heat exchanger, the s of four-way valve connects
Mouth is connected with the import of gas-liquid separator and one end of the second magnetic valve, and the outlet of gas-liquid separator connects the gas returning port of compressor,
The heat exchanger of another termination the 3rd of second electric expansion valve, the other end of the 3rd heat exchanger and the other end of the second magnetic valve and three
The C interface connection of port valve.
Described First Heat Exchanger is the water tank with coil pipe, be high-efficiency tank pipe heat exchanger plate type heat exchanger or
One kind in coaxial sleeve heat exchanger, is supported the use with water circulating pump.
The second described heat exchanger is finned tube exchanger, is used with matched with blower.
The 3rd described heat exchanger is high-efficiency tank pipe heat exchanger, plate type heat exchanger or coaxial sleeve heat exchanger,
Supported the use with water circulating pump.
Described multifunctional heat pump water heating machine group can realize that various modes are run：Refrigerated medium hot water, water heating, refrigeration, system
Heat, six kinds of cycle of modes for heating water defrosting and heating and defrosting；The electric switch control mode and refrigerant flow circuit of various patterns
It is respectively：
(1) refrigerated medium hot water：Compressor is opened, and triple valve, the coil no power of four-way valve, blower fan are not opened, the first magnetic valve,
The coil electricity of second magnetic valve, the first electric expansion valve is shut, and the second electric expansion valve opens regulation；Refrigerant flow circuit：Pressure
Contracting machine → triple valve → four-way valve → First Heat Exchanger (water heating) → pressure pan (the excessive refrigerant of storage) → first electromagnetism
The heat exchanger (refrigeration) of the electric expansion valve of valve → second → the 3rd → the second magnetic valve → gas-liquid separator → compressor.
(2) water heating：Compressor is opened, and triple valve, the coil no power of four-way valve, blower fan are opened, the coil of the first magnetic valve
It is powered, the coil no power of the second magnetic valve, the first electric expansion valve opens regulation, the second electric expansion valve is shut；Refrigerant
Flow：Compressor → triple valve → four-way valve → First Heat Exchanger (water heating) → pressure pan (the excessive refrigerant of storage) → the
The heat exchanger (heat absorption) of the electric expansion valve of one magnetic valve → first → second → four-way valve → gas-liquid separator → compressor.
(3) freeze：Compressor is opened, and threeway valve coil no power, four-way valve coil electricity, blower fan is opened, the first magnetic valve
Coil no power, the coil electricity of the second magnetic valve, the first electric expansion valve opens regulation, and the second electric expansion valve, which is opened, to be adjusted
Section；Refrigerant flow circuit：Heat exchanger (heat release) → first electric expansion valve → the second of compressor → triple valve → four-way valve → second
The heat exchanger (refrigeration) of electric expansion valve → the 3rd → the second magnetic valve → gas-liquid separator → compressor.
(4) heat：Compressor is opened, triple valve coil electricity, and four-way valve coil no power, blower fan is opened, the first magnetic valve,
The coil no power of two magnetic valves, the first electric expansion valve opens regulation, and the second electric expansion valve opens regulation；Cold-producing medium stream
Journey：The heat exchange of the electric expansion valve of heat exchanger (heat release) → second electric expansion valve of compressor → triple valve → the 3rd → first → second
Device (heat absorption) → four-way valve → gas-liquid separator → compressor.
(5) heating and defrosting pattern：Compressor is opened, threeway valve coil no power, four-way valve coil electricity, and blower fan is closed, and first
The coil no power of magnetic valve, the coil electricity of the second magnetic valve, the first electric expansion valve opens regulation, the second electric expansion valve
Open regulation；Refrigerant flow circuit：The heat exchanger (heat release defrost) of compressor → triple valve → four-way valve → second → first electronics is swollen
The heat exchanger (heat absorption) of the electric expansion valve of swollen valve → second → the 3rd → the second magnetic valve → gas-liquid separator → compressor.
(6) water heating defrosting mode：Compressor is opened, the coil no power of triple valve, four-way valve coil electricity, and blower fan is closed,
The coil electricity of first magnetic valve, the coil no power of the second magnetic valve, the first electric expansion valve opens regulation, and the second electronics is swollen
Swollen valve is shut；Refrigerant flow circuit：The heat exchanger (heat release defrost) of compressor → triple valve → four-way valve → second → first electronics is swollen
Swollen valve → the first magnetic valve → First Heat Exchanger (heat absorption) → four-way valve → gas-liquid separator → compressor.
A kind of multifunctional heat pump water heating machine group of the present invention, can adapt to the different demands such as cold and hot and hot water, realizes and integrates
Frigiopyretic dysentery is used, and equipment year utilization rate is maximized, and the average annual maximized target of energy-saving efficiency is removed in different modes while solving
The problem of white reliability.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of multifunctional heat pump water heating machine group of the invention.
Fig. 2 is a kind of water heating schematic diagram of embodiment of multifunctional heat pump water heating machine group one of the invention.
Fig. 3 is a kind of refrigeration of embodiment of multifunctional heat pump water heating machine group one of the invention, heating and defrosting schematic diagram.
Fig. 4 is that a kind of embodiment of multifunctional heat pump water heating machine group one of the invention heats schematic diagram.
Fig. 5 is a kind of refrigerated medium hot water schematic diagram of embodiment of multifunctional heat pump water heating machine group one of the invention.
Fig. 6 is that a kind of embodiment of multifunctional heat pump water heating machine group one of the invention heats water defrosting schematic diagram.
Fig. 2 to Fig. 6 is prominent workflow, and each same Fig. 1 of device sequence number is not indicated, illustrated hereby.
Marginal data
1------ compressors；2------ triple valves；3---- four-way valves；
4----- First Heat Exchangers；5--- pressure pans；The magnetic valves of 6----- first；
The electric expansion valves of 7----- first；The heat exchangers of 8---- second；9---- gas-liquid separators；
The electric expansion valves of 10---- second；The heat exchangers of 11---- the 3rd；The magnetic valves of 12------- second；
13-------- blower fans
Embodiment
The structure and work of the multifunction water-heating unit of the present invention is further described by embodiment below in conjunction with the accompanying drawings
Make principle.But the content is not limited only to shown in accompanying drawing.
A kind of multifunctional heat pump water heating machine group, including compressor 1, triple valve 2, four-way valve 3, First Heat Exchanger 4, pressure pan
5th, the first magnetic valve 6, the first electric expansion valve 7, the second heat exchanger 8, gas-liquid separator 9, the second electric expansion valve the 10, the 3rd are changed
Hot device 11, the second magnetic valve 12 and blower fan 13, the blast pipe of the compressor and the A interfaces of triple valve are connected, and the B of triple valve connects
Mouth is connected with the d interfaces of four-way valve, and the c interfaces of four-way valve are connected with First Heat Exchanger, the other end of First Heat Exchanger and first
Magnetic valve one end is connected, and pressure pan is installed on the pipeline between First Heat Exchanger and the first magnetic valve, the first magnetic valve it is another
End point two-way, connects the first electric expansion valve, another road connects the second electric expansion valve, another termination of the first electric expansion valve all the way
Second heat exchanger, the e interfaces of another termination four-way valve of the second heat exchanger, the s interfaces of four-way valve and the import of gas-liquid separator
And second magnetic valve one end connection, the outlet of gas-liquid separator connects the gas returning port of compressor, the second electric expansion valve it is another
The 3rd heat exchanger is terminated, the other end of the 3rd heat exchanger is connected with the other end of the second magnetic valve and the C interface of triple valve.
First Heat Exchanger is water tank high-efficiency tank pipe heat exchanger plate type heat exchanger or coaxial sleeve with coil pipe
Heat exchange of heat pipe, is supported the use with water circulating pump.
Second heat exchanger is finned tube exchanger, is used with matched with blower.The 3rd described heat exchanger is high-efficiency tank tubular type
Heat exchanger plate type heat exchanger or coaxial sleeve heat exchanger, are supported the use with water circulating pump.
Described multifunctional heat pump water heating machine group can realize that various modes are run：Refrigerated medium hot water, water heating, refrigeration, system
Heat, six kinds of cycle of modes for heating water defrosting and heating and defrosting；The electric switch control mode and refrigerant flow circuit of various patterns
It is respectively：
(1) refrigerated medium hot water：Compressor is opened, and triple valve, the coil no power of four-way valve, blower fan are not opened, the first magnetic valve,
The coil electricity of second magnetic valve, the first electric expansion valve is shut, and the second electric expansion valve opens regulation；Refrigerant flow circuit：Pressure
Contracting machine → triple valve → four-way valve → First Heat Exchanger (water heating) → pressure pan (the excessive refrigerant of storage) → first electromagnetism
The heat exchanger (refrigeration) of the electric expansion valve of valve → second → the 3rd → the second magnetic valve → gas-liquid separator → compressor.
(2) water heating：Compressor is opened, and triple valve, the coil no power of four-way valve, blower fan are opened, the coil of the first magnetic valve
It is powered, the coil no power of the second magnetic valve, the first electric expansion valve opens regulation, the second electric expansion valve is shut；Refrigerant
Flow：Compressor → triple valve → four-way valve → First Heat Exchanger (water heating) → pressure pan (the excessive refrigerant of storage) → the
The heat exchanger (heat absorption) of the electric expansion valve of one magnetic valve → first → second → four-way valve → gas-liquid separator → compressor.
(3) freeze：Compressor is opened, and threeway valve coil no power, four-way valve coil electricity, blower fan is opened, the first magnetic valve
Coil no power, the coil electricity of the second magnetic valve, the first electric expansion valve opens regulation, and the second electric expansion valve, which is opened, to be adjusted
Section；Refrigerant flow circuit：Heat exchanger (heat release) → first electric expansion valve → the second of compressor → triple valve → four-way valve → second
The heat exchanger (refrigeration) of electric expansion valve → the 3rd → the second magnetic valve → gas-liquid separator → compressor.
(4) heat：Compressor is opened, triple valve coil electricity, and four-way valve coil no power, blower fan is opened, the first magnetic valve,
The coil no power of two magnetic valves, the first electric expansion valve opens regulation, and the second electric expansion valve opens regulation；Cold-producing medium stream
Journey：The heat exchange of the electric expansion valve of heat exchanger (heat release) → second electric expansion valve of compressor → triple valve → the 3rd → first → second
Device (heat absorption) → four-way valve → gas-liquid separator → compressor.
(5) heating and defrosting pattern：Compressor is opened, threeway valve coil no power, four-way valve coil electricity, and blower fan is closed, and first
The coil no power of magnetic valve, the coil electricity of the second magnetic valve, the first electric expansion valve opens regulation, the second electric expansion valve
Open regulation；Refrigerant flow circuit：The heat exchanger (heat release defrost) of compressor → triple valve → four-way valve → second → first electronics is swollen
The heat exchanger (heat absorption) of the electric expansion valve of swollen valve → second → the 3rd → the second magnetic valve → gas-liquid separator → compressor.
(6) water heating defrosting mode：Compressor is opened, the coil no power of triple valve, four-way valve coil electricity, and blower fan is closed,
The coil electricity of first magnetic valve, the coil no power of the second magnetic valve, the first electric expansion valve opens regulation, and the second electronics is swollen
Swollen valve is shut；Refrigerant flow circuit：The heat exchanger (heat release defrost) of compressor → triple valve → four-way valve → second → first electronics is swollen
Swollen valve → the first magnetic valve → First Heat Exchanger (heat absorption) → four-way valve → gas-liquid separator → compressor.
Certainly, the invention is not restricted to above address the embodiment shown in accompanying drawing, modification that the spirit of Fan Yiben creation is made and
Equivalent transformation, or various deformation is used on this basis, belong in the scope of the present invention.
Claims (4)
1. a kind of multifunctional heat pump water heating machine group, including compressor (1), triple valve (2), four-way valve (3), First Heat Exchanger (4),
Pressure pan (5), the first magnetic valve (6), the first electric expansion valve (7), the second heat exchanger (8), gas-liquid separator (9), the second electricity
Sub- expansion valve (10), the 3rd heat exchanger (11), the second magnetic valve (12) and blower fan (13), it is characterised in that：The compressor (1)
Blast pipe be connected with the A interfaces of triple valve (2), the B interface of triple valve (2) is connected with the d interfaces of four-way valve (3), four-way valve
(3) c interfaces are connected with First Heat Exchanger (4), and the other end of First Heat Exchanger (4) is connected with the first magnetic valve (6) one end, high
Pressure tank (5) is installed on the pipeline between First Heat Exchanger (4) and the first magnetic valve (6), and the other end of the first magnetic valve (6) is divided to two
Road, connects the first electric expansion valve (7) all the way, and another road connects the second electric expansion valve (10), the first electric expansion valve (7) it is another
Terminate the second heat exchanger (8), the e interfaces of another termination four-way valve (3) of the second heat exchanger (8), the s interfaces of four-way valve (3) with
The import of gas-liquid separator (9) and one end connection of the second magnetic valve (12), the outlet of gas-liquid separator (9) connects compressor (1)
Gas returning port, the heat exchanger (11) of another termination the 3rd of the second electric expansion valve (10), the other end of the 3rd heat exchanger (11) with
The C interface connection of the other end and triple valve (2) of second magnetic valve (12).
2. a kind of multifunctional heat pump water heating machine group according to claim 1, it is characterised in that：The First Heat Exchanger (4)
It is the water tank with coil pipe, is one kind in high-efficiency tank pipe heat exchanger plate type heat exchanger or coaxial sleeve heat exchanger, with
Water circulating pump is supported the use.
3. a kind of multifunctional heat pump water heating machine group according to claim 1, it is characterised in that：Second heat exchanger (8)
It is finned tube exchanger, is used with matched with blower.
4. a kind of multifunctional heat pump water heating machine group according to claim 1, it is characterised in that：3rd heat exchanger (11)
It is high-efficiency tank pipe heat exchanger, plate type heat exchanger or coaxial sleeve heat exchanger, is supported the use with water circulating pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368017.6A CN106996643A (en) | 2017-05-16 | 2017-05-16 | A kind of multifunctional heat pump water heating machine group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710368017.6A CN106996643A (en) | 2017-05-16 | 2017-05-16 | A kind of multifunctional heat pump water heating machine group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106996643A true CN106996643A (en) | 2017-08-01 |
Family
ID=59435918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710368017.6A Pending CN106996643A (en) | 2017-05-16 | 2017-05-16 | A kind of multifunctional heat pump water heating machine group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106996643A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186131A (en) * | 2018-10-25 | 2019-01-11 | 科希曼电器有限公司 | A kind of heat pump system of comprehensive multi-mode hybrid working |
| CN110455070A (en) * | 2019-08-13 | 2019-11-15 | 湖北文理学院 | A kind of multi-state heat pump drier system and its control method |
| CN110736265A (en) * | 2019-08-07 | 2020-01-31 | 广东爱尼智能家电制造有限公司 | multifunctional heat pump water heater set |
-
2017
- 2017-05-16 CN CN201710368017.6A patent/CN106996643A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186131A (en) * | 2018-10-25 | 2019-01-11 | 科希曼电器有限公司 | A kind of heat pump system of comprehensive multi-mode hybrid working |
| CN110736265A (en) * | 2019-08-07 | 2020-01-31 | 广东爱尼智能家电制造有限公司 | multifunctional heat pump water heater set |
| CN110455070A (en) * | 2019-08-13 | 2019-11-15 | 湖北文理学院 | A kind of multi-state heat pump drier system and its control method |
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