CN202562030U - Heat recovery type heat pump water heating system - Google Patents
Heat recovery type heat pump water heating system Download PDFInfo
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- CN202562030U CN202562030U CN 201220192606 CN201220192606U CN202562030U CN 202562030 U CN202562030 U CN 202562030U CN 201220192606 CN201220192606 CN 201220192606 CN 201220192606 U CN201220192606 U CN 201220192606U CN 202562030 U CN202562030 U CN 202562030U
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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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Abstract
The utility model discloses a heat recovery type heat pump water heating system, which includes an accumulator heat exchanger, a water side heat exchanger, an outdoor heat exchanger, a compressor and a four-way valve, wherein one ends of the accumulator heat exchanger, the water side heat exchanger and the outdoor heat exchanger are communicated with one another, and the other ends of the accumulator heat exchanger, the water side heat exchanger and the outdoor heat exchanger are connected to the compressor through the four-way valve. The heat recovery type heat pump water heating system of the utility model stores heat energy in waste hot water after the user's bath in the accumulator heat exchanger, and takes out the heat energy when being needed, to recover heat energy in waste water after the user's bath, and effectively solve the problem of low heating efficiency of the existing air energy heat pump water heater in winter as well, so as to improve the heating efficiency and achieve higher economic benefit and social benefit.
Description
Technical field
The utility model relates to the Teat pump boiler field, particularly relates to a kind of heat reclamation type heat pump hot-water system.
Background technology
At present, water heater is main with electric heater, gas heater, solar water heater mainly on the market, has occurred Teat pump boiler in recent years.The efficiency of energy utilization of electric heater and gas heater is low, and uses dangerous; The solar water appliance has the characteristics of energy-conserving and environment-protective, but night and overcast and rainy can't the use, needs to adopt the auxiliary electrical heating.Compare with traditional water heater, air energy heat pump water heater has the advantage of energy-saving and environmental protection, and stable work in work, and it adopts a spot of electric energy as drive energy, from environment, absorbs to be transferred to high temperature heat source after low-grade heat energy improves its grade.
But still there is shortcoming in existing plain edition air energy heat pump water heater, and its heating performance descends with environment temperature and decays, easy frosting under low temperature environment simultaneously, and this greatly reduces the applicability of air energy heat pump water heater in north China.
Simultaneously, because people's bathing mode is shower or bath in a tub mostly, still about 35 ℃, this part glassware for drinking water has bigger heat energy to the hot water temperature after the bathing, can recycle; Since electric power can not the time-of-use tariffs policy, low ebb electricity price lattice are lower than peak electricity tariff, if effectively utilize low ebb electricity, can further improve the economy of water heater.
The utility model content
Based on this, be necessary can not break away from easy frosting under dependence to environment, the low temperature environment to the prior art Teat pump boiler, and the characteristics of failing to make full use of recyclable heat resource, a kind of heat reclamation type heat pump hot-water system is provided.
For realizing that the utility model purpose provides a kind of heat reclamation type heat pump hot-water system; It is characterized in that; Comprise regenerative heat exchanger, water-side heat, outdoor heat exchanger, compressor and cross valve; One end of said regenerative heat exchanger, said water-side heat and said outdoor heat exchanger is interconnected, and the other end of said regenerative heat exchanger, said water-side heat and said outdoor heat exchanger is connected said compressor through said cross valve.
Preferably, said cross valve comprises first cross valve and second cross valve;
Said heat pump hot-water system also comprises first electric expansion valve, second electric expansion valve, second magnetic valve and the 3rd magnetic valve;
The port of export of said compressor connects the D end of first cross valve;
The E end of first cross valve connects the D end of second cross valve;
The E end of said second cross valve connects the arrival end of said water-side heat;
The port of export of said water-side heat connects an end of the 3rd magnetic valve;
After the one end parallel connection of one end of said first electric expansion valve and said second electric expansion valve, an end of parallel connection is connected with the other end of the 3rd magnetic valve;
The other end of said first electric expansion valve connects the arrival end of said regenerative heat exchanger;
The other end of said second electric expansion valve connects the arrival end of said outdoor heat exchanger;
The port of export of said regenerative heat exchanger connects the C end of second cross valve;
The port of export of said outdoor heat exchanger connects an end of second magnetic valve;
The other end of said second magnetic valve connects the C end of said first cross valve;
The S end of said first cross valve and the S end of second cross valve are connected the arrival end of said compressor respectively,
Preferably, said heat pump hot-water system also comprises first magnetic valve;
Said first magnetic valve is connected in parallel on said first electric expansion valve, said second electric expansion valve and the said regenerative heat exchanger.
Preferably, said heat pump hot-water system also comprises bathing apparatus, and the current road of said water-side heat links to each other with said bathing apparatus.
Preferably, said heat pump hot-water system also comprises filter, and said regenerative heat exchanger is positioned at the below of said bathing apparatus, and said regenerative heat exchanger top connects said filter.
Preferably, said regenerative heat exchanger is a phase-change heat-exchanger.
Preferably, phase transition temperature being housed in the said phase-change heat-exchanger is 35～40 ℃ solid-solid phase-change heat-storing material.
Preferably, said phase change heat storage material is paraffin-expanded graphite composite phase-changing material.
The beneficial effect of the utility model: the heat among the spent hot water of the utility model heat reclamation type heat pump hot-water system after with user's bathing is stored in the regenerative heat exchanger; When needing heat is taken out; When promptly having reclaimed the heat in the waste water after user's bathing; Effectively solve the inefficient problem of existing air energy heat pump water heater winter heating, improved heating efficiency, have bigger economic benefit and social benefit.
A kind of new Defrost mode is provided, energy-conserving and environment-protective more.The low ebb electricity in evening capable of using carries out accumulation of heat simultaneously, with the economy of the operation of raising system greatly, strengthens the market competitiveness of Teat pump boiler.
Description of drawings
For the purpose, technical scheme and the advantage that make the utility model heat reclamation type heat pump hot-water system and heat treatment method thereof clearer; Below in conjunction with concrete accompanying drawing and specific embodiment, the utility model heat reclamation type heat pump hot-water system and heat treatment method thereof are further elaborated.
Fig. 1 heats aqueous mode, accumulation of heat and heats that water parallel connection air source heats aqueous mode and accumulation of heat heats the system schematic that water series connection air source heats aqueous mode for the accumulation of heat of the utility model heat reclamation type heat pump hot-water system heats aqueous mode, air source;
Fig. 2 is the system schematic of the utility model heat reclamation type heat pump hot-water system accumulation of heat pattern;
Fig. 3 is the system schematic of the utility model heat reclamation type heat pump hot-water system thermal storage defrosting pattern;
Fig. 4 is the system schematic of the utility model heat reclamation type heat pump hot-water system water side defrosting mode;
Fig. 5 is the structural representation of the utility model heat reclamation type heat pump hot-water system.
The specific embodiment
Shown in Fig. 1-4, a kind of heat reclamation type heat pump hot-water system of the utility model, the user is during without hot water, system with last user's bathing after or the heat among the spent hot water in the life be stored in the regenerative heat exchanger, again heat is discharged when the user uses hot water.
Said heat reclamation type heat pump hot-water system comprises regenerative heat exchanger 1, water-side heat 2, outdoor heat exchanger 3, bathing apparatus 4 and compressor 5; One end of said regenerative heat exchanger 1, said water-side heat 2 and said outdoor heat exchanger 3 is interconnected, and the other end connects compressor 5 through cross valve;
Wherein, said water-side heat 2 is communicated with water storage devices such as said bathing apparatus 4 or water tank, is used to provide hot water, offers the user and uses.
Said regenerative heat exchanger 1 is used for reclaiming the heat that uses back hot water; Hot water temperature after the bathing is about 35 ℃, and the hot water after the bathing is through said regenerative heat exchanger 1 and phase-change material heat exchange, and temperature reduces the back discharging.
Said outdoor heat exchanger 3 is used for the heat of absorbing environmental.When system moves; Carry out accumulation of heat and heat the aqueous mode principle of priority; When the shortage of heat of regenerative heat exchanger 1 storage, priming chamber external heat exchanger 3 utilizes heat pump principle;, under the driving of small amount of electrical energy, be delivered to water-side heat 2 to the energy of storage heat that absorbs from outdoor heat exchanger 3 and the regenerative heat exchanger 1 and be used to add hot water through thermodynamic cycle.
Preferably, as a kind of embodiment, said regenerative heat exchanger 1 is positioned at the below of said bathing apparatus 4, and said regenerative heat exchanger 1 top connects filter 6.As shown in Figure 5, bath water is through said bathing apparatus 4 outputs, and the water after user's bathing filters through said filter 6 and flows out after the back gets into said regenerative heat exchanger 1 cooling again.Said regenerative heat exchanger 1 can be installed in the floor.
When regenerative heat exchanger 1 can be installed in the floor, the user is before bathing, and regenerative heat exchanger 1 is release heat in advance, is used to improve the temperature of bathing environment, prevents to discharge the temperature that a large amount of hot water improves the bathing environment.
Preferably, as a kind of embodiment, said regenerative heat exchanger is a phase-change heat-exchanger, phase transition temperature is housed is 35～40 ℃ solid-solid phase-change heat-storing material in the said phase-change heat-exchanger.
Preferably, said phase change heat storage material is paraffin-expanded graphite composite phase-changing material.
Preferably, as a kind of embodiment, said cross valve comprises first cross valve 7 and second cross valve 8; Said heat pump hot-water system also comprises first electric expansion valve 9, second electric expansion valve 10, first magnetic valve 11, second magnetic valve 12 and the 3rd magnetic valve 13;
During outage, the D of cross valve end and E end are connected, and when powering on, the D end is connected with the C end, and the S end connects the compressor air suction end.
The port of export of said compressor 5 connects the D end of first cross valve 7; The E end of first cross valve 7 connects the D end of second cross valve 8; The E end of said second cross valve 8 connects the arrival end of said water-side heat; The port of export of said water-side heat 2 connects an end of the 3rd magnetic valve 13; After the one end parallel connection of one end of said first electric expansion valve 9 and said second electric expansion valve 10, an end of parallel connection is connected with the other end of the 3rd magnetic valve 13; The other end of said first electric expansion valve 9 connects the arrival end of said regenerative heat exchanger 1; The other end of said second electric expansion valve 10 connects the arrival end of said outdoor heat exchanger 3; The port of export of said regenerative heat exchanger 1 connects the C end of second cross valve 8; The port of export of said outdoor heat exchanger 3 connects an end of second magnetic valve 12; The other end of said second magnetic valve 12 connects the C end of said first cross valve 7; The S end of said first cross valve 7 and the S end of second cross valve 8 are connected the arrival end of said compressor 5 respectively; Said first magnetic valve 11 is connected in parallel on said first electric expansion valve 9, said second electric expansion valve 10 and the said regenerative heat exchanger 1.
The heat treatment method of a kind of heat reclamation type heat pump hot-water system of the utility model comprises following heat treatment step: accumulation of heat heats that aqueous mode, air source heat aqueous mode, accumulation of heat heats water associating air source and heats aqueous mode and defrosting mode;
Said accumulation of heat heats water associating air source and heats aqueous mode and comprise that accumulation of heat heats water parallel connection air source and heats aqueous mode and accumulation of heat and heat the water associating air source of connecting and heat aqueous mode;
Said defrosting mode comprises thermal storage defrosting pattern and water side defrosting mode.
1, accumulation of heat heats aqueous mode
Heat aqueous mode as Fig. 1 is said for accumulation of heat.
The user is when using hot water, and wastewater temperature and flow in getting into regenerative heat exchanger 1 reach the setting requirement, and system carries out accumulation of heat and heats aqueous mode.
This moment, first cross valve 7 all cut off the power supply with second cross valve 8 (D with E hold be connected), the certain step number of first electric expansion valve, 9 unlatchings, and second electric expansion valve 10 closes to minimum step number, makes it be equivalent to open circuit, and does not have a throttling action; First magnetic valve 11 and second magnetic valve 12 are closed, and the 3rd magnetic valve 13 is opened; The blower fan of outdoor heat exchanger 3 cuts out, and said compressor 5, first electric expansion valve 9 are connected to form the heat-exchange working medium closed circuit with regenerative heat exchanger 1 and water-side heat 2.
2, air source heats aqueous mode
Be illustrated in figure 1 as air source and heat aqueous mode.
This moment, first cross valve 7 all cut off the power supply with second cross valve 8 (D is connected with the E end); First electric expansion valve 9 is closed; Said second electric expansion valve 10 is opened certain step number, and said first magnetic valve 11 cuts out, and said second magnetic valve 12 is opened with said the 3rd magnetic valve 13.Said compressor 5, second electric expansion valve 10 are connected to form with water-side heat 2 and outdoor heat exchanger 3 and heat the working medium closed circuit.
3, accumulation of heat pattern
Be illustrated in figure 2 as the accumulation of heat pattern.
When regenerative heat exchanger 1 storing heat was not enough, this moment, the utility model heat pump hot-water system can absorb heat from outdoor environment.First cross valve, 7 outages (D is connected with the E end); Second cross valve, 8 energisings (D is connected with the C end), first magnetic valve 11 and the 3rd magnetic valve 13 are all closed, and second magnetic valve 12 is opened; First electric expansion valve 9 is opened certain step number; Second electric expansion valve 10 reaches maximum step number, makes it be equivalent to path, does not have a throttling action.
Can utilize low ebb electricity store heat in night this moment, low ebb electricity price lattice are lower than peak electricity tariff, utilize the low ebb electricity to carry out accumulation of heat, with the economy of the operation of raising system greatly, strengthen the market competitiveness of Teat pump boiler.
4, accumulation of heat heats water parallel connection air source and heats aqueous mode
When not using hot water, the user maybe is not lower than the setting requirement when getting into regenerative heat exchanger 1 interior wastewater temperature and flow; When the used heat amount of stored heat behind the last use of the regenerative heat exchanger 1 storage user hot water was not enough, system's execution accumulation of heat heated water associating air source and heats aqueous mode.
Being illustrated in figure 1 as accumulation of heat heats water parallel connection air source and heats aqueous mode.
This moment, first cross valve 7 all cut off the power supply with second cross valve 8 (D is connected with the E end); First magnetic valve 11 cuts out; Second magnetic valve 12 and the 3rd magnetic valve 13 are opened; First electric expansion valve 9 and second electric expansion valve 10 are opened certain step number,, outdoor heat exchanger 3 and regenerative heat exchanger 1 are all as evaporimeter.Said compressor 5, first electric expansion valve 9 (or second electric expansion valve 10) are connected to form the heat-exchange working medium closed circuit with outdoor heat exchanger 3 (or regenerative heat exchanger 1) and water-side heat 2, and water is through water-side heat 2 heat temperature raisings.
5, accumulation of heat heats water series connection air source and heats aqueous mode
When not using hot water, the user maybe is not lower than the setting requirement when getting into regenerative heat exchanger 1 interior wastewater temperature and flow; When the used heat amount of stored heat behind the last use of the regenerative heat exchanger 1 storage user hot water was not enough, system's execution accumulation of heat heated water associating air source and heats aqueous mode.
Being illustrated in figure 1 as accumulation of heat heats water series connection air source and heats aqueous mode.
This moment, first cross valve 7 all cut off the power supply with second cross valve 8 (D with E end be connected), and first magnetic valve 11, second magnetic valve 12 and the 3rd magnetic valve 13 are all opened, the certain step number of first electric expansion valve, 9 unlatchings, and second electric expansion valve, 10 passes are minimum step numbers extremely.
6, thermal storage defrosting pattern
Be illustrated in figure 3 as the thermal storage defrosting pattern.
The heat of regenerative heat exchanger 1 then capable of using during 3 defrostings of the utility model heat pump hot-water system outdoor heat exchanger; First cross valve, 7 energisings this moment (D is connected with the C end); Second cross valve, 8 outages (D is connected with the E end), first electric expansion valve 9 is opened certain step number, and second electric expansion valve 10 reaches maximum step number; First magnetic valve 11 and the 3rd magnetic valve 13 are all closed, and second magnetic valve 12 is opened.
This moment, regenerative heat exchanger 1 was equivalent to evaporimeter.Said compressor 5, second electric expansion valve 10 are connected to form defrosting working medium closed circuit with regenerative heat exchanger 1 and outdoor heat exchanger 3, outdoor heat exchanger 3 are defrosted not influencing under the condition that hot water uses.
7, water side defrosting mode
Be illustrated in figure 4 as water side defrosting mode.
When in the regenerative heat exchanger 1 during shortage of heat, said heat reclamation type heat pump hot-water system defrosting can absorb heats from water-side heat 2.This moment, first cross valve 7 was all switched on second cross valve 8 (D is connected with the C end), and first electric expansion valve 9 is closed, and second electric expansion valve 10 is opened certain step number, and first magnetic valve 11 cuts out, and second magnetic valve 12 and the 3rd magnetic valve 13 are all opened.Said compressor 5, second electric expansion valve 10 are connected to form defrosting working medium closed circuit with water-side heat 2 and outdoor heat exchanger 3.
Heat among the spent hot water of the utility model heat reclamation type heat pump hot-water system after with user's bathing is stored in the regenerative heat exchanger; When needing heat is taken out; When promptly having reclaimed the heat in the waste water after user's bathing; Effectively solve the inefficient problem of existing air energy heat pump water heater winter heating, improved heating efficiency, have bigger economic benefit and social benefit.
A kind of new Defrost mode is provided, energy-conserving and environment-protective more.The low ebb electricity in evening capable of using carries out accumulation of heat simultaneously, with the economy of the operation of raising system greatly, strengthens the market competitiveness of Teat pump boiler.
The above embodiment has only expressed several kinds of embodiments of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection domain of the utility model.Therefore, the protection domain of the utility model patent should be as the criterion with accompanying claims.
Claims (7)
1. heat reclamation type heat pump hot-water system; It is characterized in that; Comprise regenerative heat exchanger, water-side heat, outdoor heat exchanger, compressor and cross valve; One end of said regenerative heat exchanger, said water-side heat and said outdoor heat exchanger is interconnected, and the other end of said regenerative heat exchanger, said water-side heat and said outdoor heat exchanger is connected said compressor through said cross valve.
2. heat reclamation type heat pump hot-water system according to claim 1 is characterized in that, said cross valve comprises first cross valve and second cross valve;
Said heat pump hot-water system also comprises first electric expansion valve, second electric expansion valve, second magnetic valve and the 3rd magnetic valve;
The port of export of said compressor connects the D end of first cross valve;
The E end of first cross valve connects the D end of second cross valve;
The E end of said second cross valve connects the arrival end of said water-side heat;
The port of export of said water-side heat connects an end of the 3rd magnetic valve;
After the one end parallel connection of one end of said first electric expansion valve and said second electric expansion valve, an end of parallel connection is connected with the other end of the 3rd magnetic valve;
The other end of said first electric expansion valve connects the arrival end of said regenerative heat exchanger;
The other end of said second electric expansion valve connects the arrival end of said outdoor heat exchanger;
The port of export of said regenerative heat exchanger connects the C end of second cross valve;
The port of export of said outdoor heat exchanger connects an end of second magnetic valve;
The other end of said second magnetic valve connects the C end of said first cross valve;
The S end of said first cross valve and the S end of second cross valve are connected the arrival end of said compressor respectively.
3. heat reclamation type heat pump hot-water system according to claim 2 is characterized in that, also comprises first magnetic valve;
Said first magnetic valve is connected in parallel on said first electric expansion valve, said second electric expansion valve and the said regenerative heat exchanger.
4. according to each described heat reclamation type heat pump hot-water system of claim 1 to 3, it is characterized in that also comprise bathing apparatus, the current road of said water-side heat links to each other with said bathing apparatus.
5. heat reclamation type heat pump hot-water system according to claim 4 is characterized in that, also comprises filter, and said regenerative heat exchanger is positioned at the below of said bathing apparatus, and said regenerative heat exchanger top connects said filter.
6. according to each described heat reclamation type heat pump hot-water system of claim 1 to 3, it is characterized in that said regenerative heat exchanger is a phase-change heat-exchanger.
7. heat reclamation type heat pump hot-water system according to claim 6 is characterized in that, phase transition temperature is housed is 35～40 ℃ solid-solid phase-change heat-storing material in the said phase-change heat-exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220192606 CN202562030U (en) | 2012-04-28 | 2012-04-28 | Heat recovery type heat pump water heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220192606 CN202562030U (en) | 2012-04-28 | 2012-04-28 | Heat recovery type heat pump water heating system |
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| CN202562030U true CN202562030U (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220192606 Expired - Lifetime CN202562030U (en) | 2012-04-28 | 2012-04-28 | Heat recovery type heat pump water heating system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375912A (en) * | 2012-04-28 | 2013-10-30 | 珠海格力电器股份有限公司 | Heat-recovery heat pump water heating system and heat treatment method thereof |
| CN103968162A (en) * | 2013-01-29 | 2014-08-06 | 三菱电机株式会社 | Heating medium utilizing apparatus |
| CN104101127A (en) * | 2013-04-01 | 2014-10-15 | 珠海格力电器股份有限公司 | VRV (Varied Refrigerant Volume) air conditioning system and VRV air conditioning defrosting control method |
| CN107990399A (en) * | 2017-12-27 | 2018-05-04 | 科希曼电器有限公司 | A kind of storage heating system of time sharing segment heating |
| CN110953669A (en) * | 2019-12-31 | 2020-04-03 | 贺迈新能源科技（上海）有限公司 | Energy storage type air conditioning unit |
| CN112393424A (en) * | 2019-08-15 | 2021-02-23 | 合肥美的暖通设备有限公司 | Hot water and hot air module, control method thereof and multifunctional water heater |
-
2012
- 2012-04-28 CN CN 201220192606 patent/CN202562030U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375912A (en) * | 2012-04-28 | 2013-10-30 | 珠海格力电器股份有限公司 | Heat-recovery heat pump water heating system and heat treatment method thereof |
| CN103375912B (en) * | 2012-04-28 | 2015-08-12 | 珠海格力电器股份有限公司 | Heat reclamation type heat pump hot-water system and heat treatment method thereof |
| CN103968162A (en) * | 2013-01-29 | 2014-08-06 | 三菱电机株式会社 | Heating medium utilizing apparatus |
| CN103968162B (en) * | 2013-01-29 | 2016-04-27 | 三菱电机株式会社 | Thermal medium utilized device |
| CN104101127A (en) * | 2013-04-01 | 2014-10-15 | 珠海格力电器股份有限公司 | VRV (Varied Refrigerant Volume) air conditioning system and VRV air conditioning defrosting control method |
| CN107990399A (en) * | 2017-12-27 | 2018-05-04 | 科希曼电器有限公司 | A kind of storage heating system of time sharing segment heating |
| CN107990399B (en) * | 2017-12-27 | 2023-12-26 | 科希曼电器有限公司 | Heat accumulating type heating system capable of achieving time-sharing and sectional temperature rising |
| CN112393424A (en) * | 2019-08-15 | 2021-02-23 | 合肥美的暖通设备有限公司 | Hot water and hot air module, control method thereof and multifunctional water heater |
| CN112393424B (en) * | 2019-08-15 | 2022-02-18 | 合肥美的暖通设备有限公司 | Hot water and hot air module, control method thereof and multifunctional water heater |
| CN110953669A (en) * | 2019-12-31 | 2020-04-03 | 贺迈新能源科技（上海）有限公司 | Energy storage type air conditioning unit |
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Granted publication date: 20121128 |
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