CN202485274U - Double-water-tank hot water system of heat-recovery-type air-cooled heat pump unit - Google Patents
Double-water-tank hot water system of heat-recovery-type air-cooled heat pump unit Download PDFInfo
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- CN202485274U CN202485274U CN 201120572735 CN201120572735U CN202485274U CN 202485274 U CN202485274 U CN 202485274U CN 201120572735 CN201120572735 CN 201120572735 CN 201120572735 U CN201120572735 U CN 201120572735U CN 202485274 U CN202485274 U CN 202485274U
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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
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Abstract
The utility model relates to a double-water-tank hot water system of a heat-recovery-type air-cooled heat pump unit. The double-water-tank hot water system comprises a controller, a refrigerator main machine, a first electromagnetic three-way valve, a second electromagnetic three-way valve, a first electromagnetic two-way valve, a second electromagnetic two-way valve, a working water tank, a heat-insulating water tank, a first temperature sensor, a second temperature sensor, a third temperature sensor, a filtering device, a first water pump, a second water pump, a first gate valve, a second gate valve and a third gate valve, wherein the working water tank is respectively provided with F1, F2 and F3 water-level switches from bottom to top; the heat-insulating water tank is respectively provided with F4 and F5 water-level switches from bottom to top; the first temperature sensor is arranged in the working water tank, the second temperature sensor is arranged in the heat-insulating water tank, and the third temperature sensor is arranged on a pipeline between the second electromagnetic two-way valve and a hot water pipe net; and the second gate valve is arranged at the bottom of the working water tank, and the third gate valve is arranged at the bottom of the heat-insulating water tank. The double-water-tank hot water system of the heat-recovery-type air-cooled heat pump unit, disclosed by the utility model, realizes the conversion of water system pipes by utilizing the first electromagnetic three-way valve, the second electromagnetic three-way valve and the plurality of gate valves, is low in power consumption and high in hot water utilization rate, and can achieve the effect of constant water temperature when a user uses hot water.
Description
Technical field
The utility model relates to air-conditioning technical field, particularly relates to a kind of two water tank hot-water heating systems of recovery type heat Air-Cooled Heat Pump Unit.
Background technology
Along with the continuous increase of China's economic level, and the improving constantly of living standard, people also constantly improve the demand of air-conditioning.Not only need air-conditioning to freeze but also require it to heat, even can comprise the function that heats hydrophone, thereby realize the purpose of multi-functional unification.
The hot-water heating system of source pump of the prior art adopts single water tank circulation heating; The hydronic source pump of this single water tank, need through the water pump forced circulation with thermal energy transfer in hot water storage tank, in case of the water use peak period perhaps to winter; The effective heat supply water yield of system often can't reach designing requirement; Can not satisfy client's water demand, objectively will cause the phenomenon of " air source water heater has problem ", instant heating poor performance and hot and cold water directly mixing cause water temperature low suddenly high suddenly.
Therefore; Needing badly provides a kind of and possesses that the multi-period heat pump water system that the constant water warm water is provided solves because hot and cold water directly mixes the water temperature problem fluctuated that causes; Can also reduce simultaneously the operating temperature point of unit; Reduce power consumption, the technology of two water tank hot-water heating systems of the recovery type heat Air-Cooled Heat Pump Unit of raising rate of thermal water utilization seems particularly important.
The utility model content
The purpose of the utility model is to avoid weak point of the prior art and provides a kind of and possess that the multi-period heat pump water system that the constant water warm water is provided solves because hot and cold water directly mixes the water temperature problem fluctuated that causes; Can also reduce simultaneously the operating temperature point of unit; Reduce power consumption, improve two water tank hot-water heating systems of the recovery type heat Air-Cooled Heat Pump Unit of rate of thermal water utilization.
The purpose of the utility model realizes through following technical scheme:
A kind of two water tank hot-water heating systems of recovery type heat Air-Cooled Heat Pump Unit are provided, have included control device, refrigeration host computer, first three-way solenoid valve, second three-way solenoid valve, the first electromagnetism two-port valve, the second electromagnetism two-port valve, operating water tank, attemperater, first temperature sensor, second temperature sensor, three-temperature sensor, filter, first water pump, second water pump, first gate valve, second gate valve and the 3rd gate valve;
Said operating water tank is respectively arranged with F1 water level switch, F2 water level switch and F3 water level switch from bottom to up;
Said attemperater is respectively arranged with F4 water level switch and F5 water level switch from bottom to up;
Said first temperature sensor is arranged at said operating water tank, and said second temperature sensor is arranged at said attemperater, and said three-temperature sensor is arranged at the pipeline between said second electromagnetism two-port valve and the hot water pipe net;
Said second gate valve is arranged at the bottom of said operating water tank, and said the 3rd gate valve is arranged at the bottom of said attemperater;
1 end of said refrigeration host computer one side is connected with the A end of said first gate valve and said first three-way solenoid valve respectively; The C end of said first three-way solenoid valve is connected with the water inlet of said operating water tank; The benefit cold water outlet of said operating water tank is connected with the said first electromagnetism two-port valve; The B end of said first three-way solenoid valve is connected with first water inlet of said attemperater; Second water inlet of said attemperater is connected with an end of the said second electromagnetism two-port valve, and the other end of the said second electromagnetism two-port valve is connected with an end of hot water pipe net, and the other end of said hot water pipe net is connected with an end of said second water pump; The other end of said second water pump is connected with second delivery port of said attemperater; First delivery port of said attemperater is connected with the B of said second three-way solenoid valve end, and the A end of said second three-way solenoid valve is connected with the delivery port of said operating water tank, and the C end of said second three-way solenoid valve is connected with an end of said filter; The other end of said filter is connected with an end of said first water pump, and the other end of said first water pump is connected with 2 ends of said refrigeration host computer;
Another side joint air-conditioner water system of said refrigeration host computer;
Said refrigeration host computer, said first three-way solenoid valve, said operating water tank, said second three-way solenoid valve, said filter, said first water pump are formed hot water cyclesystem; Said operating water tank and said attemperater are formed the water storage system of water system; Said first electromagnetism two-port valve and said operating water tank are formed water charging system; Said second water pump, said three-temperature sensor, the said second electromagnetism two-port valve and said attemperater are formed the water system of water system; Said refrigeration host computer and said first gate valve, said operating water tank and said second gate valve, said attemperater and said the 3rd gate valve are formed purging system separately respectively.
Wherein, said filter is a y-type filter.
Wherein, said first temperature sensor is arranged at the bottom of said operating water tank.
Wherein, said second temperature sensor is arranged at the bottom of said attemperater.
Wherein, the pipeline between said second electromagnetism two-port valve and the hot water pipe net is life hot water return pipe road.
The beneficial effect of the utility model:
A kind of two water tank hot-water heating systems of recovery type heat Air-Cooled Heat Pump Unit include control device, refrigeration host computer, first three-way solenoid valve, second three-way solenoid valve, the first electromagnetism two-port valve, the second electromagnetism two-port valve, operating water tank, attemperater, first temperature sensor, second temperature sensor, three-temperature sensor, filter, first water pump, second water pump, first gate valve, second gate valve and the 3rd gate valve; Said operating water tank is respectively arranged with F1 water level switch, F2 water level switch and F3 water level switch from bottom to up; Said attemperater is respectively arranged with F4 water level switch and F5 water level switch from bottom to up; Said first temperature sensor is arranged at said operating water tank, and said second temperature sensor is arranged at said attemperater, and said three-temperature sensor is arranged at the pipeline between said second electromagnetism two-port valve and the hot water pipe net; Said second gate valve is arranged at the bottom of said operating water tank, and said the 3rd gate valve is arranged at the bottom of said attemperater; 1 end of said refrigeration host computer one side is connected with the A end of said first gate valve and said first three-way solenoid valve respectively; The C end of said first three-way solenoid valve is connected with the water inlet of said operating water tank; The benefit cold water outlet of said operating water tank is connected with the said first electromagnetism two-port valve; The B end of said first three-way solenoid valve is connected with first water inlet of said attemperater; Second water inlet of said attemperater is connected with an end of the said second electromagnetism two-port valve, and the other end of the said second electromagnetism two-port valve is connected with an end of hot water pipe net, and the other end of said hot water pipe net is connected with an end of said second water pump; The other end of said second water pump is connected with second delivery port of said attemperater; First delivery port of said attemperater is connected with the B of said second three-way solenoid valve end, and the A end of said second three-way solenoid valve is connected with the delivery port of said operating water tank, and the C end of said second three-way solenoid valve is connected with an end of said filter; The other end of said filter is connected with an end of said first water pump, and the other end of said first water pump is connected with 2 ends of said refrigeration host computer; Another side joint air-conditioner water system of said refrigeration host computer; Said refrigeration host computer, said first three-way solenoid valve, said operating water tank, said second three-way solenoid valve, said filter, said first water pump are formed hot water cyclesystem; Said operating water tank and said attemperater are formed the water storage system of water system; Said first electromagnetism two-port valve and said operating water tank are formed water charging system; Said second water pump, said three-temperature sensor, the said second electromagnetism two-port valve and said attemperater are formed the water system of water system; Said refrigeration host computer and said first gate valve, said operating water tank and said second gate valve, said attemperater and said the 3rd gate valve are formed purging system separately respectively.
The utility model is realized the switching between the water system pipeline through the mode that adopts first three-way solenoid valve, second three-way solenoid valve and a plurality of gate valves; Make recovery type heat Air-Cooled Heat Pump Unit water system according to the different needs different water tank of flowing through, form two water tank hot-water heating systems of recovery type heat source pump.It is low in energy consumption to have unit, and rate of thermal water utilization is high, the constant effect of water temperature in the time of can also reaching client's water simultaneously.
Description of drawings
Utilize accompanying drawing that utility model is described further; But the embodiment in the accompanying drawing does not constitute any restriction to the utility model; For those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to following accompanying drawing.
Fig. 1 is the structural representation of two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit of the utility model.
In Fig. 1, include:
1---refrigeration host computer,
2---operating water tank,
3---first three-way solenoid valve,
4---the first electromagnetism two-port valve,
5---attemperater, 51---first delivery port, 52---second delivery port, 53---first water inlet, 54---, second water inlet,
6---the second electromagnetism two-port valve,
7---three-temperature sensor,
8---the F5 water level switch,
9---the F4 water level switch,
10---second water pump,
11---the 3rd gate valve,
12---second temperature sensor,
13---second three-way solenoid valve,
14---second gate valve,
15---first temperature sensor,
16---first gate valve,
17---filter,
18---first water pump,
19---the F3 water level switch,
20---the F2 water level switch,
21---the F1 water level switch,
22---hot water pipe net.
The specific embodiment
In conjunction with following examples the utility model is further described.
The specific embodiment of two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit of the utility model; As shown in Figure 1, include control device, refrigeration host computer 1, first three-way solenoid valve 3, second three-way solenoid valve 13, the first electromagnetism two-port valve 4, the second electromagnetism two-port valve 6, operating water tank 2, attemperater 5, first temperature sensor 15, second temperature sensor 12, three-temperature sensor 7, filter 17, first water pump 18, second water pump 10, first gate valve 16, second gate valve 14 and the 3rd gate valve 11.
Said operating water tank 2 is respectively arranged with F1 water level switch 21, F2 water level switch 20 and F3 water level switch 19 from bottom to up.
Said attemperater 5 is respectively arranged with F4 water level switch 9 and F5 water level switch 8 from bottom to up.
Said first temperature sensor 15 is arranged at said operating water tank 2, and said second temperature sensor 12 is arranged at said attemperater 5, and said three-temperature sensor 7 is arranged at the pipeline between said second electromagnetism two-port valve 6 and the hot water pipe net 22.Through the control of 7 pairs of hot water pipe nets 22 of three-temperature sensor, the water that can prevent to rest on the hot water pipe net 22 keeps high relatively temperature always, can avoid the client using hot water during the initial stage, and the colder situation of water occurs.
Said second gate valve 14 is arranged at the bottom of said operating water tank 2, and said the 3rd gate valve 11 is arranged at the bottom of said attemperater 5.
1 end of said refrigeration host computer 1 one sides is connected with the A end of said first gate valve 16 and said first three-way solenoid valve 3 respectively; The C end of said first three-way solenoid valve 3 is connected with the water inlet of said operating water tank 2; The benefit cold water outlet of said operating water tank 2 is connected with the said first electromagnetism two-port valve 4; The B end of said first three-way solenoid valve 3 is connected with first water inlet 53 of said attemperater 5; Second water inlet 54 of said attemperater 5 is connected with an end of the said second electromagnetism two-port valve 4; The other end of the said second electromagnetism two-port valve 4 is connected with an end of hot water pipe net 22; The other end of said hot water pipe net 22 is connected with an end of said second water pump 10, and the other end of said second water pump 10 is connected with second delivery port 52 of said attemperater 5, and first delivery port 51 of said attemperater 5 is connected with the B of said second three-way solenoid valve 13 end; The A end of said second three-way solenoid valve 13 is connected with the delivery port of said operating water tank 2; The C end of said second three-way solenoid valve 13 is connected with an end of said filter 17, and the other end of said filter 17 is connected with an end of said first water pump 18, and the other end of said first water pump 18 is connected with 2 ends of said refrigeration host computer 1.
Said refrigeration host computer 1 another side joint air-conditioner water system.
Said refrigeration host computer 1, said first three-way solenoid valve 3, said operating water tank 2, said second three-way solenoid valve 13, said filter 17, said first water pump 18 are formed hot water cyclesystems; Said operating water tank 2 and said attemperater 5 are formed the water storage system of water systems; The said first electromagnetism two-port valve 4 is formed water charging system with said operating water tank 2; Said second water pump 10, said three-temperature sensor 7, the said second electromagnetism two-port valve 6 and said attemperater 5 are formed the water system of water systems; Said refrigeration host computer 1 and said first gate valve 16, said operating water tank 2 are formed purging system separately with said second gate valve 14, said attemperater 5 respectively with said the 3rd gate valve 11.
Concrete, said filter 17 is a y-type filter.
Concrete, said first temperature sensor 15 is arranged at the bottom of said operating water tank 2.
Concrete, said second temperature sensor 12 is arranged at the bottom of said attemperater 5.
Concrete, the pipeline between said second electromagnetism two-port valve 6 and the hot water pipe net 22 is life hot water return pipe road.
The utility model is realized the switching between the water system pipeline through the mode that adopts first three-way solenoid valve 3, second three-way solenoid valve 13 and a plurality of gate valves; Make recovery type heat Air-Cooled Heat Pump Unit water system according to the different needs different water tank of flowing through, thereby form the system of a kind of pair of water tank control.The refrigeration host computer 1 of the utility model when realizing round-the-clock supply constant water warm water, has also reduced the power consumption of unit through all-around intelligent control, and improves the utilization rate of hot water.The employing of first three-way solenoid valve 3 and second three-way solenoid valve 13 is than using the electromagnetism two-port valve, more convenient control and saving cost.
The workflow of two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit of the utility model
:
When refrigeration host computer 1 is switched on first, the F4 water level switch 9 in the attemperater 5 is detected, if F4 water level switch 9 breaks off; Then the F2 water level switch 20 in the operating water tank 2 is detected,, then open 4 pairs of operating water tanks of the first electromagnetism two-port valve 2 and carry out cold water and replenish if F2 water level switch 20 breaks off; Water level up to operating water tank 2 is higher than the F3 water level; F3 water level switch 19 closures are just closed the first electromagnetism two-port valve 4, stop operating water tank 2 moisturizings.
When the temperature that detects when first temperature sensor 15 of operating water tank 2 is lower than default value, open first three-way solenoid valve 3 and second three-way solenoid valve 13, make that the A of first three-way solenoid valve 3, C end are communicated with, behind the A of second three-way solenoid valve 13, the connection of C end; Move 18 a period of times of first water pump; After guaranteeing that unit internal water system system has enough flows, start 1 pair of operating water tank 2 of refrigeration host computer and heat, when the temperature of first temperature sensor, 15 detections is higher than default value; Closed first three-way solenoid valve 3 and second three-way solenoid valve 13; First water pump 18 is out of service, and refrigeration host computer 1 is in holding state, stops operating water tank 2 heating.
When attemperater 5 water levels are lower than the F5 water level; F5 water level switch 8 breaks off; Make its A, B hold connection through regulating first three-way solenoid valve 3, the operation of first water pump 18, the hot water of operating water tank 2 is transported to attemperater 5 behind the A, B end of the A through second three-way solenoid valve 13, C end, filter 17, first water pump 18, refrigeration host computer 1, first three-way solenoid valve 3 successively; Realization surpasses the F5 water level to the moisturizing of attemperater 5 up to attemperater 5 water levels.As be checked through attemperater 5 water levels and be higher than the F5 water level, then attemperater 5 is not carried out moisturizing.
To attemperater 5 moisturizings the time, if being lower than the F1 water level, the water level of operating water tank 2 cause F1 water level switch 21 to break off, then open the first electromagnetism two- port valve 4 and 16 pairs of operating water tanks 2 of first gate valve are mended cold water.Simultaneously; When first temperature sensor, 15 temperature sensors of operating water tank 2 are lower than setting value; Opening first three-way solenoid valve 3 makes its A, the connection of C end, second three-way solenoid valve 13 make its A, C hold connection; The running refrigerating main frame 1 and first water pump 18 are realized the heating process to operating water tank 2, till first temperature sensor, 15 temperature are higher than setting value.
If attemperater 5 does not use for a long time; When second temperature sensor, 12 temperature of attemperater 5 are lower than setting value; Regulate successively then that second three-way solenoid valve 13 makes that its B, C termination are logical, operation first water pump 18, running refrigerating main frame 1, regulate first three-way solenoid valve 3 and make its A, B termination logical, heat by 1 pair of attemperater 5 of refrigeration host computer.
For water system, when three-temperature sensor 7 temperature sensors are lower than setting value, open the second electromagnetism two-port valve 6 successively; Second water pump 10 circulates the water of attemperater 5, when three-temperature sensor 7 temperature sensors are higher than setting value in hot water pipe net 22; Second water pump 10 is out of service; Close the second electromagnetism two-port valve 6, the water temperature of hot water pipe net 22 is remained in the uniform temperature, avoiding the client is the phenomenon of cold water during water at the beginning.
Should be noted that at last; Above embodiment is only in order to explain the technical scheme of the utility model; But not to the restriction of the utility model protection domain, although with reference to preferred embodiment the utility model has been done explanation at length, those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement the technical scheme of the utility model, and not break away from the essence and the scope of the utility model technical scheme.
Claims (5)
1. two water tank hot-water heating systems of a recovery type heat Air-Cooled Heat Pump Unit is characterized in that: include control device, refrigeration host computer, first three-way solenoid valve, second three-way solenoid valve, the first electromagnetism two-port valve, the second electromagnetism two-port valve, operating water tank, attemperater, first temperature sensor, second temperature sensor, three-temperature sensor, filter, first water pump, second water pump, first gate valve, second gate valve and the 3rd gate valve;
Said operating water tank is respectively arranged with F1 water level switch, F2 water level switch and F3 water level switch from bottom to up;
Said attemperater is respectively arranged with F4 water level switch and F5 water level switch from bottom to up;
Said first temperature sensor is arranged at said operating water tank, and said second temperature sensor is arranged at said attemperater, and said three-temperature sensor is arranged at the pipeline between said second electromagnetism two-port valve and the hot water pipe net;
Said second gate valve is arranged at the bottom of said operating water tank, and said the 3rd gate valve is arranged at the bottom of said attemperater;
1 end of said refrigeration host computer one side is connected with the A end of said first gate valve and said first three-way solenoid valve respectively; The C end of said first three-way solenoid valve is connected with the water inlet of said operating water tank; The benefit cold water outlet of said operating water tank is connected with the said first electromagnetism two-port valve; The B end of said first three-way solenoid valve is connected with first water inlet of said attemperater; Second water inlet of said attemperater is connected with an end of the said second electromagnetism two-port valve, and the other end of the said second electromagnetism two-port valve is connected with an end of hot water pipe net, and the other end of said hot water pipe net is connected with an end of said second water pump; The other end of said second water pump is connected with second delivery port of said attemperater; First delivery port of said attemperater is connected with the B of said second three-way solenoid valve end, and the A end of said second three-way solenoid valve is connected with the delivery port of said operating water tank, and the C end of said second three-way solenoid valve is connected with an end of said filter; The other end of said filter is connected with an end of said first water pump, and the other end of said first water pump is connected with 2 ends of said refrigeration host computer;
Another side joint air-conditioner water system of said refrigeration host computer;
Said refrigeration host computer, said first three-way solenoid valve, said operating water tank, said second three-way solenoid valve, said filter, said first water pump are formed hot water cyclesystem; Said operating water tank and said attemperater are formed the water storage system of water system; Said first electromagnetism two-port valve and said operating water tank are formed water charging system; Said second water pump, said three-temperature sensor, the said second electromagnetism two-port valve and said attemperater are formed the water system of water system; Said refrigeration host computer and said first gate valve, said operating water tank and said second gate valve, said attemperater and said the 3rd gate valve are formed purging system separately respectively.
2. two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit according to claim 1 is characterized in that: said filter is a y-type filter.
3. two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit according to claim 1, it is characterized in that: said first temperature sensor is arranged at the bottom of said operating water tank.
4. two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit according to claim 1, it is characterized in that: said second temperature sensor is arranged at the bottom of said attemperater.
5. two water tank hot-water heating systems of a kind of recovery type heat Air-Cooled Heat Pump Unit according to claim 1 is characterized in that: the pipeline between said second electromagnetism two-port valve and the hot water pipe net is life hot water return pipe road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120572735 CN202485274U (en) | 2011-12-31 | 2011-12-31 | Double-water-tank hot water system of heat-recovery-type air-cooled heat pump unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120572735 CN202485274U (en) | 2011-12-31 | 2011-12-31 | Double-water-tank hot water system of heat-recovery-type air-cooled heat pump unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202485274U true CN202485274U (en) | 2012-10-10 |
Family
ID=46959692
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120572735 Expired - Lifetime CN202485274U (en) | 2011-12-31 | 2011-12-31 | Double-water-tank hot water system of heat-recovery-type air-cooled heat pump unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN202485274U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445027A (en) * | 2011-12-31 | 2012-05-09 | 广东欧科空调制冷有限公司 | Double-water tank hot water system of heat-recovery air-cooling heat pump unit |
-
2011
- 2011-12-31 CN CN 201120572735 patent/CN202485274U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445027A (en) * | 2011-12-31 | 2012-05-09 | 广东欧科空调制冷有限公司 | Double-water tank hot water system of heat-recovery air-cooling heat pump unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
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| CX01 | Expiry of patent term |