CN109974074A - A kind of publilc baths residual neat recovering system and its control method - Google Patents
A kind of publilc baths residual neat recovering system and its control method Download PDFInfo
- Publication number
- CN109974074A CN109974074A CN201910251638.5A CN201910251638A CN109974074A CN 109974074 A CN109974074 A CN 109974074A CN 201910251638 A CN201910251638 A CN 201910251638A CN 109974074 A CN109974074 A CN 109974074A
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- Prior art keywords
- heat
- pipe
- water
- evaporator
- water inlet
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
- F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
-
- 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]
- Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention provides a kind of publilc baths residual neat recovering system and its control method, the water tank at water source is provided for inputting the water inlet pipe of water and to bathe indoor shower set, the heat exchange coil that below bathroom there is the remaining water that bathroom is discharged to be collected, heat exchange coil and water inlet tube heat exchange, the output end of water inlet pipe is connect through connecting line with box condenser, there is the first heat exchanging pipe containing heat-conducting medium in box condenser, first heat exchanging pipe is successively arranged first throttle valve, first evaporator and the first compressor for driving heat-conducting medium to recycle along the first heat exchanging pipe, return pipe is also linked between box condenser and water tank, the water pump that there is the liquid in pipe that makes to flow back unidirectionally be discharged on return pipe in water tank, present invention utilizes a large amount of waste heats that publilc baths generates, waste heat, which is collected, carries out heating cold water, controllability is strong, turn Change high-efficient, the saving energy, it is highly-safe, there is popularity.
Description
Technical field
The present invention relates to a kind of publilc baths residual neat recovering system and its control methods.
Background technique
Currently, used hot water is directly discharged into ground water regime and by the higher steaming of temperature by most publilc baths
Vapour directly passes through window and is discharged to outdoor, will lead to more waste heat in this way and is wasted.It is contemplated that by the waste heat benefit of this part
It uses, the cold water compared with low temperature is heated, can thus reduce fuel, reduce heating cost and reduce environmental pollution.
Currently there are waste-heat recovery device be mainly heat pipe residual-heat recovery, but this device volume is larger, and exists
Limitation is not suitable for the recycling of bathroom waste heat.System of the invention has the advantage that compared to traditional waste heat recovery mode in the market
Controllability is strong, high conversion efficiency, saves the energy, highly-safe, has popularity.
Summary of the invention
Present system improves the above problem, i.e., the technical problem to be solved by the present invention is to existing bathrooms to return
It receives and uses heat pipe residual-heat recovery, but this device volume is larger, and there are limitations, are not suitable for the recycling of bathroom waste heat.
Specific embodiments of the present invention are: a kind of publilc baths residual neat recovering system, for inputting the water inlet pipe of water and to bathe
Indoor shower set provides the water tank at water source, the heat exchange that below the bathroom there is the remaining water that bathroom is discharged to be collected
Coil pipe, the heat exchange coil and water inlet tube heat exchange, the output end of the water inlet pipe are connect through connecting line with box condenser,
There is the first heat exchanging pipe containing heat-conducting medium, first heat exchanging pipe is successively arranged first segment in the box condenser
Flow valve, the first evaporator and the first compressor for driving heat-conducting medium to recycle along the first heat exchanging pipe, the box condensation
It is also linked with return pipe between device and water tank, there is the liquid in pipe that makes to flow back unidirectionally to be discharged into water tank on the return pipe
Water pump.
Further, the publilc baths inner top has total-heat exchanger, discharges publilc baths in the total-heat exchanger
Hot wind is passed through the backwind tube with publilc baths top air outlet connection, and it is first in the first evaporator that the output end of the backwind tube, which is passed through,
Heat transferring medium in evaporator in the first heat exchanging pipe provides thermal energy.
Further, also there is the second heat exchanging pipe in the box condenser, have in second heat exchanging pipe upper
It is disposed with second throttle, the second evaporator and the second compressor, the heat exchange coil bottom is linked with remaining water discharge pipe
Road, the storm drain road are mentioned by the second evaporator and with for the heat transferring medium in the second heat exchanging pipe in the second evaporator
For thermal energy.
Further, the return pipe is through electric heater unit and water tank connection.
The invention also includes a kind of publilc baths residual neat recovering system control methods, utilize a kind of publilc baths waste heat time as described above
Receipts system, on the output pipe of the water tank, return pipe and water tank in there is temperature sensor, and water tank is exported to leaching
It is Ta that pipeline, which presets leaving water temperature value, between bath equipment, and the water temperature that water inlet pipe is passed through in box condenser is T1, box cold
It is T2 that condenser, which is expelled to the water temperature in return pipe, and specific control method is as follows:
(1) first compressor opens work, and the second compressor and electric heater unit do not work, the heat transferring medium of the first heat exchanging pipe
Enter in box condenser after the first evaporator absorbs thermal energy and adds to being passed through the water inlet in box condenser by water inlet pipe
Heat；The hot wind of the discharge in publilc baths is delivered in the first evaporator using the total-heat exchanger of publilc baths inner top and is changed as first
The auxiliary thermal source of pipe line improves heat pump efficiency；
(2) T2 and T1 is detected, is continued to run if T1 > Ta according to step 1, if T1 < Ta, which is opened, continues the second compressor work
Make, the heat transferring medium of the second heat exchanging pipe enters in box condenser after the second evaporator absorbs thermal energy, and publilc baths bottom is located at
Remaining water in heat exchange coil passes to the water inlet in water inlet pipe by heat, and water inlet pipe is passed through in box condenser by the second heat exchange
Heating is realized in the heat transmitting of pipeline, and the remaining water after carrying out heat exchange with water inlet pipe being discharged from heat exchange coil enters second and steams
It sends out and is used as auxiliary thermal source in device, and provide thermal energy for the heat transferring medium in the second heat exchanging pipe in the second evaporator, to improve
Heat pump efficiency；
(3) T2 and T1 is continued to test in the case where step (2), if T2 < Ta, opens electric heater unit in step (1) and step
Suddenly it is worked at the same time on the basis of (2), guarantees that Ta temperature reaches requirement.
Compared with prior art, the invention has the following advantages: utilizing remaining water and bathroom heat in the embodiment of the present invention
The heat supply of gas is effectively guaranteed the hot water supply problem in winter, is also utilized by the combined operating of two sets of heat pump circulating systems
A large amount of waste heats that publilc baths generates, waste heat, which is collected, carries out heating cold water, improve economy.In addition, in embodiment
, can according to the actual situation also by electric heater unit, when being in great demand, heating can open electric heating in the case where having little time
Device stores to heat inflow temperature and be sent in water tank by pipeline.
Detailed description of the invention
Fig. 1 is attachment structure schematic diagram of the present invention；
Fig. 2 is present system control method logical flow chart.
1- water inlet pipe, the bathroom 2-, 3- shower set, 4- heat exchange coil, 5- air inlet, 6- total-heat exchanger, 6a- are returned in figure
Air hose, the first evaporator of 7-, the first compressor of 8a-, the second compressor of 8b-, 9- box condenser, the first heat exchanging pipe of 9a-,
The first heat exchanging pipe of 9b-, 10a- first throttle valve, 10b- second throttle, 11a- motor-driven valve, 11b- motor-driven valve, 12- second steam
Send out device, 13- electric heater unit, 14- water pump, 15- water tank, 16- return pipe.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, in this implementation, a kind of publilc baths residual neat recovering system, including water inlet pipe 1, bathroom 2 and indoor to bathe
Shower set 3 provides the water tank 15 at water source, the heat exchange plate that below the bathroom there is the remaining water that bathroom is discharged to be collected
Pipe 17, the heat exchange coil and water inlet pipe carry out heat exchange, and the output end of the water inlet pipe is through connecting line and box condenser
Connection, the box condenser is interior to have the first heat exchanging pipe 9a containing heat-conducting medium, and first heat exchanging pipe is successively set
There are first throttle valve, the first evaporator and the first compressor 8a for driving heat-conducting medium to recycle along the first heat exchanging pipe 9a,
Return pipe 16 is also linked between the box condenser and water tank, having on the return pipe 16 makes the liquid in pipe list that flows back
To the water pump 14 being discharged into water tank.
The publilc baths inner top has total-heat exchanger 6, and the hot wind for discharging publilc baths in the total-heat exchanger is passed through
With the backwind tube 6a of publilc baths top air outlet connection, the output end of the backwind tube 6a is passed through in the first evaporator as the first evaporation
Heat transferring medium in device in the first heat exchanging pipe provides thermal energy.
Also there is the second heat exchanging pipe 9b in the box condenser 9, successively set in second heat exchanging pipe with upper
It is equipped with second throttle 10b, the second evaporator 12 and the second compressor 8b, the heat exchange coil bottom is linked with remaining water discharge pipe
Road 18, the storm drain road by the second evaporator and with for the heat transferring medium in the second heat exchanging pipe in the second evaporator
Auxiliary thermal energy is provided.
When work, the invention reside in collect publilc baths in by shower fall shower after hot water, in winter when publilc baths in hot water
Amount demand is big, and the waste heat of generation is more, is collected and is fed them into the beneath heat exchange coil 4 on floor, flow into heat exchange plate at this time
The coolant-temperature gage of pipe 4 is higher to carry out heat convection inside and outside pipe with the cold water that water inlet pipe flows into, so that the cold water in water inlet pipe obtains it
A part of heat, temperature increases, and water inlet pipe water flows to motor-driven valve 11a at along pipeline, and motor-driven valve 11a is opened at this time, process
The water of water inlet pipe after heat exchange enters hot water and enters in box condenser, box condenser by two sets of heat pump circulating systems into
Enter the water inlet heating in box condenser；
Wherein the first heat exchanging pipe 9a by first throttle valve, the first evaporator, realize under the driving of the first compressor 8a the
A set of heat pump circulating system, heat-conducting medium is after condenser discharges thermal energy in conduction to box condenser in the first heat exchanging pipe 9a
Water inlet.The present invention provides auxiliary thermal source for the first evaporator using the discharge bathroom high temperature air of total-heat exchanger to improve
The efficiency of first set heat pump circulating system.
Wherein the second heat exchanging pipe 9b passes through second throttle, the second evaporator, the reality under the driving of the second compressor 8b
Show second set of heat pump circulating system, heat-conducting medium conducts after condenser discharges thermal energy to box condensation in the second heat exchanging pipe 9b
Water inlet in device.The present invention provides auxiliary thermal source using water more than heat exchange coil as the second evaporator to improve second set of heat
The efficiency of pump circulation system.
The combined operating of two sets of heat pump circulating systems, cleverly being connected using two heat pumps ensure that winter with regard to effectively
Hot water supply problem, also utilize publilc baths generation a large amount of waste heats, waste heat, which is collected, carries out heating cold water, improves
Economy.And it can have little time to reach hot water demand and can open by heat pump heating according to the actual situation, when water demand amount is very big
It opens electric heater unit 13 and carrys out heat hot water and it is sent to the inner storage of water tank 15 by pipeline, it can be for when user needs
Family uses.
Utilize a kind of publilc baths residual neat recovering system as described above, the efferent duct of the water tank, return pipe and water tank
There is temperature sensor, and it is Ta that water tank, which is exported to the default leaving water temperature value of pipeline between shower set, in road, it is box cold
The water temperature that water inlet pipe is passed through in condenser is T1, and it is T2, specific controlling party that box condenser, which is expelled to the water temperature in return pipe,
Method is as follows:
(1) first compressor opens work, and the second compressor and electric heater unit do not work, the heat transferring medium of the first heat exchanging pipe
Enter in box condenser after the first evaporator absorbs thermal energy and adds to being passed through the water inlet in box condenser by water inlet pipe
Heat；The hot wind of the discharge in publilc baths is delivered in the first evaporator using the total-heat exchanger of publilc baths inner top and is changed as first
The auxiliary thermal source of pipe line improves heat pump efficiency；
(2) T2 and T1 is detected, is continued to run if T1 > Ta according to step 1, if T1 < Ta, which is opened, continues the second compressor work
Make, the heat transferring medium of the second heat exchanging pipe enters in box condenser after the second evaporator absorbs thermal energy, and publilc baths bottom is located at
Remaining water in heat exchange coil passes to the water inlet in water inlet pipe by heat, and water inlet pipe is passed through in box condenser by the second heat exchange
Heating is realized in the heat transmitting of pipeline, and the remaining water after carrying out heat exchange with water inlet pipe being discharged from heat exchange coil enters second and steams
It sends out and is used as auxiliary thermal source in device, and provide thermal energy for the heat transferring medium in the second heat exchanging pipe in the second evaporator, to improve
Heat pump efficiency；
(3) T2 and T1 is continued to test in the case where step (2), if T2 < Ta, opens electric heater unit in step (1) and step
(2) it is worked at the same time on the basis of, guarantees that Ta temperature reaches requirement.
Any technical solution disclosed in aforementioned present invention unless otherwise stated, if it discloses numberical range,
Disclosed numberical range is preferred numberical range, and any it should be appreciated by those skilled in the art preferred numberical ranges
The only obvious or representative numerical value of technical effect in many enforceable numerical value.It, can not since numerical value is more
Exhaustion, so the present invention just discloses technical solution of the component values to illustrate the present invention, also, the above-mentioned numerical value enumerated is not
The limitation to the invention protection scope should be constituted.
If aforementioned present invention is open or relates to the components or structural member of connection fastened to each other, except as otherwise sound
It is bright outer, it is fixedly connected it is to be understood that connection (such as using bolt or screw connection) can be removedly fixed, can also manage
Solution are as follows: it is non-removable to be fixedly connected with (such as riveting, welding), certainly, connection fastened to each other or integral structure (
Such as manufactured using casting technique is integrally formed) replaced (obviously can not be using except integrally formed technique).
In addition, for indicating the art of positional relationship or shape applied in any technical solution disclosed in aforementioned present invention
Its meaning includes approximate with its, similar or close state or shape to language unless otherwise stated.
Either component provided by the invention by multiple individual component parts either assembled, or one
The separate part that forming technology manufactures.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (5)
1. a kind of publilc baths residual neat recovering system, which is characterized in that water inlet pipe including bathroom, for inputting water and indoor to bathe
The water tank at shower set offer water source, the heat exchange coil that there is the remaining water that bathroom is discharged to be collected for the bathroom lower section,
The heat exchange coil and water inlet tube heat exchange, the output end of the water inlet pipe is connect through connecting line with box condenser, described
There is the first heat exchanging pipe containing heat-conducting medium, first heat exchanging pipe is successively arranged first throttle in box condenser
Valve, the first evaporator and the first compressor for driving heat-conducting medium to recycle along the first heat exchanging pipe, the box condenser
Return pipe is also linked between water tank, the water that there is the liquid in pipe that makes to flow back unidirectionally be discharged on the return pipe in water tank
Pump.
2. a kind of publilc baths residual neat recovering system according to claim 1, which is characterized in that the publilc baths inner top has complete
Heat exchanger, the hot wind for discharging publilc baths in the total-heat exchanger are passed through the backwind tube with publilc baths top air outlet connection,
The output end of the backwind tube is passed through in the first evaporator and provides for the heat transferring medium in the first heat exchanging pipe in the first evaporator
Thermal energy.
3. a kind of publilc baths residual neat recovering system according to claim 2, which is characterized in that also have in the box condenser
There is the second heat exchanging pipe, has in second heat exchanging pipe and be above disposed with second throttle, the second evaporator and second
Compressor, the heat exchange coil bottom are linked with remaining water discharge pipe road, the remaining water discharge pipe road by the second evaporator and with
Thermal energy is provided for the heat transferring medium in the second heat exchanging pipe in the second evaporator.
4. a kind of publilc baths residual neat recovering system according to claim 3, which is characterized in that the return pipe is filled through electric heating
It sets and water tank connection.
5. a kind of publilc baths residual neat recovering system control method, which is characterized in that more than a kind of publilc baths as claimed in claim 3
Heat recovery system, on the output pipe of the water tank, return pipe and water tank in there is temperature sensor, and water tank exports
Presetting leaving water temperature value to pipeline between shower set is Ta, and the water temperature that water inlet pipe is passed through in box condenser is T1, case
It is T2 that formula condenser, which is expelled to the water temperature in return pipe, and specific control method is as follows:
(1) first compressor opens work, and the second compressor and electric heater unit do not work, the heat transferring medium of the first heat exchanging pipe
Enter in box condenser after the first evaporator absorbs thermal energy and adds to being passed through the water inlet in box condenser by water inlet pipe
Heat；The hot wind of the discharge in publilc baths is delivered in the first evaporator using the total-heat exchanger of publilc baths inner top and is changed as first
The auxiliary thermal source of pipe line improves heat pump efficiency；
(2) T2 and T1 is detected, is continued to run if T1 > Ta according to step 1, if T1 < Ta, which is opened, continues the second compressor work
Make, the heat transferring medium of the second heat exchanging pipe enters in box condenser after the second evaporator absorbs thermal energy, and publilc baths bottom is located at
Remaining water in heat exchange coil passes to the water inlet in water inlet pipe by heat, and water inlet pipe is passed through in box condenser by the second heat exchange
Heating is realized in the heat transmitting of pipeline, and the remaining water after carrying out heat exchange with water inlet pipe being discharged from heat exchange coil enters second and steams
It sends out and is used as auxiliary thermal source in device, and provide thermal energy for the heat transferring medium in the second heat exchanging pipe in the second evaporator, to improve
Heat pump efficiency；
(3) T2 and T1 is continued to test in the case where step (2), if T2 < Ta, opens electric heater unit in step (1) and step
(2) it is worked at the same time on the basis of, guarantees that Ta temperature reaches requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251638.5A CN109974074A (en) | 2019-03-29 | 2019-03-29 | A kind of publilc baths residual neat recovering system and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910251638.5A CN109974074A (en) | 2019-03-29 | 2019-03-29 | A kind of publilc baths residual neat recovering system and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109974074A true CN109974074A (en) | 2019-07-05 |
Family
ID=67081792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910251638.5A Pending CN109974074A (en) | 2019-03-29 | 2019-03-29 | A kind of publilc baths residual neat recovering system and its control method |
Country Status (1)
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| CN (1) | CN109974074A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749860A (en) * | 2009-12-28 | 2010-06-23 | 清华大学 | Circulation heat recovery heat pump type water heater |
| CN102865662A (en) * | 2012-09-28 | 2013-01-09 | 泰安阿拉斯佳空调有限公司 | Two-stage bathing wastewater recovery device |
| CN203100160U (en) * | 2013-03-06 | 2013-07-31 | 佛山市确正冷热设备有限公司 | Shower hot air and hot water waste heat recovered type heat-pump water heater |
| CN103344044A (en) * | 2013-07-19 | 2013-10-09 | 佛山市确正冷热设备有限公司 | Three-level heated waste water waste heat recovery device of heat-pump water heater |
| CN203349509U (en) * | 2013-07-19 | 2013-12-18 | 佛山市确正冷热设备有限公司 | Waste-hot-water residual heat recycling type heat-pump water heater with electrical heating function |
| CN203550206U (en) * | 2013-11-26 | 2014-04-16 | 平武臣 | Bath waste heat recycling heat pump hot water system |
| JP2014119214A (en) * | 2012-12-18 | 2014-06-30 | Corona Corp | Storage type bath hot water supply device |
| CN105526709A (en) * | 2014-09-28 | 2016-04-27 | 青岛经济技术开发区海尔热水器有限公司 | Auxiliary heat pump device of water heater and control method |
| CN109405348A (en) * | 2018-12-05 | 2019-03-01 | 江苏天舒电器有限公司 | A kind of bathroom utilizes heat pump system with Multi-stage heat |
-
2019
- 2019-03-29 CN CN201910251638.5A patent/CN109974074A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749860A (en) * | 2009-12-28 | 2010-06-23 | 清华大学 | Circulation heat recovery heat pump type water heater |
| CN102865662A (en) * | 2012-09-28 | 2013-01-09 | 泰安阿拉斯佳空调有限公司 | Two-stage bathing wastewater recovery device |
| JP2014119214A (en) * | 2012-12-18 | 2014-06-30 | Corona Corp | Storage type bath hot water supply device |
| CN203100160U (en) * | 2013-03-06 | 2013-07-31 | 佛山市确正冷热设备有限公司 | Shower hot air and hot water waste heat recovered type heat-pump water heater |
| CN103344044A (en) * | 2013-07-19 | 2013-10-09 | 佛山市确正冷热设备有限公司 | Three-level heated waste water waste heat recovery device of heat-pump water heater |
| CN203349509U (en) * | 2013-07-19 | 2013-12-18 | 佛山市确正冷热设备有限公司 | Waste-hot-water residual heat recycling type heat-pump water heater with electrical heating function |
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Application publication date: 20190705 |