CN105546818B - A kind of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine - Google Patents
A kind of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine Download PDFInfo
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- CN105546818B CN105546818B CN201510995784.0A CN201510995784A CN105546818B CN 105546818 B CN105546818 B CN 105546818B CN 201510995784 A CN201510995784 A CN 201510995784A CN 105546818 B CN105546818 B CN 105546818B
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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
-
- 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
- F24H9/00—Details
- F24H9/0005—Details for water heaters
Abstract
A kind of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine, the outlet of high pressure compressor connects with the refrigerant inlet of the first condenser, the refrigerant outlet of first condenser connects through first throttle device with the cooling fluid inlet of subcooler all the way, another way connects with the subcooled liquid entrance of subcooler, the gas vent of subcooler connects with the entrance of high pressure compressor, the liquid outlet of subcooler is through the 3rd throttling arrangement, check valve, second throttling device, evaporator connects with the entrance of low pressure compressor, its outlet is divided into two strands, one is connected by the first stop valve with the refrigerant inlet of the second condenser, the refrigerant outlet of second condenser connects with the entrance of second throttling device；Another stop valve of stock-traders' know-how second connects with the gas access of subcooler；For total cooling water inlet by water pump and the second condenser, the connection of the first condenser, the hot water outlet of the first condenser is total hot water outlet.It is of the invention effectively to reduce energy consumption, improving energy efficiency and broaden the scope of work.
Description
Technical field
The present invention relates to field of water heaters, especially a kind of heat pump water-heating machine.
Background technology
The heat energy that heat-pump hot-water function is absorbed under electrical energy drive in environment is become high temperature heat and is used, normally
Its COP can reach 4 or so during use.Deepen instantly in the especially haze harm of environment and energy problem's getting worse, heat
Pump hot water machine has turned into the study hotspot in currently associated field, and is widely used in hotel, hospital, school, household water
Or even industrial production.But Teat pump boiler still needs to consume a large amount of electric energy after all, therefore improve its efficiency and change as one
The emphasis entered.In addition, at northern China winter relatively low temperature, common heat-pump hot-water engine efficiency drastically declines or even can not
Operation also seriously constrains its energy-saving effect.
The content of the invention
In order to overcome the shortcomings of that the energy consumption of existing heat pump water-heating machine is larger, efficiency is relatively low, working range is not wide enough, the present invention
A kind of effectively reduction energy consumption, improving energy efficiency, the efficient big temperature rise single-stage throttling cooling during rolling heat pump to broaden the scope of work are provided
Hot water machine.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine, including high pressure compressor, low pressure compressor,
First condenser, the second condenser, subcooler and evaporator, the outlet of the high pressure compressor and the system of first condenser
Cryogen entrance connects, the refrigerant outlet of first condenser all the way by the cold of first throttle device and the subcooler
But fluid intake connects, and the another way of the refrigerant outlet of first condenser connects with the subcooled liquid entrance of the subcooler
Logical, the gas vent of the subcooler connects with the entrance of the high pressure compressor, and the liquid outlet of the subcooler passes through the
Three throttling arrangements, check valve connect with the entrance of second throttling device, the outlet of the second throttling device and the evaporator
Entrance connection, the outlet of the evaporator connects with the entrance of the low pressure compressor, and the outlet of the low pressure compressor divides
For two strands, one is connected by the first stop valve with the refrigerant inlet of the second condenser, the refrigerant of second condenser
Outlet connects with the entrance of the second throttling device；The gas access that another stock-traders' know-how crosses the second stop valve and the subcooler connects
It is logical；
Total cooling water inlet is connected by water pump with the cooling water inlet of the second condenser, the hot water outlet of second condenser
Connected with the cooling water inlet of first condenser, the hot water outlet of first condenser is total hot water outlet.
Further, the outlet of the evaporator connects with the entrance of gas-liquid separator, and the gas of the gas-liquid separator goes out
Mouth connects with the entrance of the low pressure compressor.
Further, the outlet of the high pressure compressor is connected with the entrance of the first oil eliminator, the first oil separation
The oil export of device connects with the entrance of the high pressure compressor, the refrigerant outlet of first oil eliminator and described first cold
The refrigerant inlet connection of condenser；The outlet of the low pressure compressor is connected with the entrance of the second oil eliminator, second oil
The oil export of separator connects with the entrance of the low pressure compressor, and the refrigerant outlet of second oil eliminator is divided into two strands
It is connected respectively with the entrance of the first stop valve and the entrance of the second stop valve.
Further, defrost branch is set between the refrigerant outlet of second condenser and the entrance of the evaporator
Manage, the 3rd stop valve is installed on the defrost branch pipe.
The outlet of the evaporator connects by the 4th stop valve with the entrance of the high pressure compressor, the subcooler
Gas vent is connected with the entrance of the 5th stop valve, and the outlet of the 5th stop valve is connected with high pressure compressor entrance.
Either：The gas vent of the gas-liquid separator connects by the entrance of the 4th stop valve and the high pressure compressor
Logical, the gas vent of the subcooler is connected with the entrance of the 5th stop valve, the outlet of the 5th stop valve and high pressure compressed
Machine entrance is connected.
Beneficial effects of the present invention are mainly manifested in：
1st, throttled using two stages of compression two-stage, greatly expand use range compared with single-stage heat pump, improve efficiency, and
And high pressure stage compressor will be re-fed into after the cooling of low-pressure stage compressor air-discharging, and high pressure stage compressor delivery temperature is reduced, can be with
Produce the higher hot water of temperature and improve the stability of a system；
2nd, compared to existing two stages of compression heat pump, two-step heating hot water is dexterously employed, can when hot water temperature rise is larger
To reduce the wasted work of high pressure compressor to a certain degree, that is, further improve system energy efficiency.Essentially, it is existing straight
There is hot type Teat pump boiler larger heat transfer temperature difference to produce larger entropy production, and circulating heat pump water heater then can be by cold water
Mixed with hot water and equally cause larger entropy production, and the present invention reduces the production of above-mentioned entropy, the heating power for improving system is finished
Kind property；
3rd, most suitable pattern can be selected under different seasons, different external condition, lifts season to greatest extent
Energy-conservation effect, and ensure the stable operation of system.The simple pipeline of part is flexible, and logical too small amount of cut-off Vavle switching how realizes two-stage
Compression two-step heating pattern, two stages of compression one-level heating mode, low-pressure stage compression single-stage heating mode, hiigh pressure stage compression single-stage add
Heat pattern and hot-gas bypass defrost pattern.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine.
Fig. 2 is the schematic diagram of another efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine.
Fig. 3 is the schematic diagram of another efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
1~Fig. 3 of reference picture, a kind of efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine, including high pressure compressed
Machine 1, low pressure compressor 10, the first condenser 3, the second condenser 13, subcooler 5 and evaporator 8, the high pressure compressor 1
Outlet connects with the refrigerant inlet of first condenser 3, and the refrigerant outlet of first condenser 3 passes through all the way
One throttling arrangement 4 connects with the cooling fluid inlet of the subcooler 5, the refrigerant outlet of first condenser 3 it is another
Road connects with the subcooled liquid entrance of the subcooler 5, the gas vent of the subcooler 5 and entering for the high pressure compressor 1
Mouth connection, the liquid outlet of the subcooler 5 connect by the 3rd throttling arrangement 19, check valve 6 and the entrance of second throttling device 7
Logical, the outlet of the second throttling device 7 connects with the entrance of the evaporator 8, outlet and the low pressure of the evaporator 8
The entrance connection of compressor 10, the outlet of the low pressure compressor 10 are divided into two strands, and one passes through the first stop valve 12 and second
The refrigerant inlet connection of condenser 13,13 refrigerant outlets of second condenser and entering for the second throttling device 7
Mouth connection；Another stock-traders' know-how is crossed the second stop valve 14 and connected with the gas access of the subcooler 5；
Total cooling water inlet is connected by water pump 15 with the cooling water inlet of the second condenser 13, the heat of second condenser 13
Water out connects with the cooling water inlet of first condenser 3, and the hot water outlet of first condenser 3 is total hot water outlet.
Further, the outlet of the evaporator 8 connects with the entrance of gas-liquid separator 9, the gas of the gas-liquid separator 9
Outlet connects with the entrance of the low pressure compressor 10.
Further, the outlet of the high pressure compressor 1 is connected with the entrance of the first oil eliminator 2, first oil
Oil export from device 2 connects with the entrance of the high pressure compressor 1, the refrigerant outlet of first oil eliminator 2 with it is described
The refrigerant inlet connection of first condenser 3；The outlet of the low pressure compressor 10 is connected with the entrance of the second oil eliminator 11,
The oil export of second oil eliminator 11 connects with the entrance of the low pressure compressor 10, the system of second oil eliminator 11
Cryogen outlet is divided into two stocks and is not connected with the entrance of the first stop valve and the entrance of the second stop valve.
Further, defrost is set between the refrigerant outlet of second condenser 13 and the entrance of the evaporator 8
Branch pipe, the 3rd stop valve 16 is installed on the defrost branch pipe.
The outlet of the evaporator connects by the 4th stop valve with the entrance of the high pressure compressor, the subcooler
Gas vent is connected with the entrance of the 5th stop valve, and the outlet of the 5th stop valve is connected with high pressure compressor entrance.
Either：The gas vent of the gas-liquid separator 9 enters by the 4th stop valve 17 and the high pressure compressor 1
Mouthful connection, the gas vent of the subcooler 5 is connected with the entrance of the 5th stop valve 18, the outlet of the 5th stop valve 18 and
The entrance of high pressure compressor 1 is connected.
The course of work of the present embodiment is：
Reference picture 1：
Two stages of compression two-step heating pattern：When environment temperature is relatively low, required hot water temperature is again higher, and inlet water temperature
The pattern is used when relatively low, the first stop valve 12 is opened with the second stop valve 14, and high pressure compressor 1, low pressure compressor 10 are equal
Operation, water pump 15 are run.The oil-containing gaseous refrigerant of HTHP exits into the first oil eliminator from the outlet of high pressure compressor 1
2, the lubricating oil in refrigerating agent containing oil is separated in the first oil eliminator and flowed out back from the oil export of the first oil eliminator 2
To suction port of compressor, the refrigerant of HTHP exits into the refrigerant of the first condenser 3 from the refrigerant outlet of oil eliminator
Entry exotherm condenses, and the liquid refrigerant of high pressure is divided into two-way from the refrigerant outlet outflow of the first condenser 3, and the first via is passed through
Become the gas-liquid mixed refrigerant of middle pressure after first throttle device 4 and enter the low-temperature refrigerant entrance of subcooler 5, the second tunnel is entered
Enter the high-temp liquid entrance of subcooler 5 and be too cold, the liquid refrigerant after supercooling flows out from the liquid outlet of subcooler 5 to be passed through
3rd throttling arrangement 19 with mixed after check valve 6 with the liquid refrigerant from the second condenser 13 after by second throttling device
The refrigerant air-liquid mixture for becoming low-temp low-pressure after 7 enters the absorption amount of heat of evaporator 8, the low-temp low-pressure after heat absorption evaporation
Gaseous refrigerant is then drawn into the entrance of low pressure compressor 10 by gas-liquid separator 9, the refrigerating agent containing oil of medium temperature and medium pressure from
The outlet of low pressure compressor 10 is discharged into the second oil eliminator 11, oil export of the lubricating oil therein from the second oil eliminator 11
Outflow returns to the entrance of low pressure compressor 10, and the refrigerant of medium temperature and medium pressure is then from the refrigerant outlet stream of the second oil eliminator 11
Go out and be divided into two strands, one enters in the second condenser 13 liquid refrigeration for condensing heat release and becoming middle pressure by the first stop valve 12
Agent, mixed after the outflow of the refrigerant outlet of the second condenser 13 with the refrigerant exported from check valve 6, another way passes through the
Two stop valves 14 enter the gas access of subcooler 5, and the medium pressure gas refrigerant of saturation flows out from the gas vent of subcooler 5,
Return to the entrance of high pressure compressor 1.Cold water enters in the second condenser 13 after water pump 15 tentatively to be heated, and becomes middle warm
Water, then enter back into the first condenser 3 and be further heated, supplied after becoming high-temperature-hot-water from the outflow of the water out of the first condenser 3
To user.
In order to which the energy-saving effect of the present invention is better described, it shown below is and be based on two stages of compression two-step heating pattern
System simulation result of calculation and the two stages of compression heat with traditional single-stage heat pump and with patent (200720039229.1) for representative
Pump (including injection enthalpy increasing heat pump) is contrasted.During calculating, all parts model according to the conservation of mass and the conservation of energy, compressor
Isentropic efficiency using Navarro-Peris etc. (International Journal of Refrigeration, 2013,36
(7)) the equation proposed, ignores pipeline friction loss and leakage heat, and other setup parameters are shown in Table 1, the results are shown in Table 2.
As can be known from the results of Table 2, COP of the invention is highest, higher than two stages of compression heat pump by 10.2%, than traditional list
Level heat pump is even more to be higher by 44.1%.
Table 1
Table 2
Two stages of compression two-step heating pattern：When environment temperature is relatively low, required hot water temperature is again higher, and inlet water temperature
The pattern is used when more higher than environment temperature, the first stop valve 12 is closed, and the second stop valve 14 is opened, high pressure compressor 1, low
Pressure compressor 10 is run, and water pump 15 is run.Running now is compared with regular run mode, due to the first stop valve 12
To close, the second condenser 13 do not work, and comes out when cold water passes through the second condenser 13 and is not heated from water pump 15, but only the
It is heated in one condenser 3.
Low-pressure stage compresses single-stage heating mode：Being used when environment temperature is of a relatively high, and required hot water temperature is normal should
Pattern.First stop valve 12 is opened, and the second stop valve 14 is closed, and high pressure compressor 1 is closed, and low pressure compressor 10 is run, water pump
15 operations.The refrigerating agent containing oil of HTHP is discharged into the second oil eliminator 11 from the outlet of low pressure compressor 10, therein
Lubricating oil returns to the entrance of low pressure compressor 10 from the oil export outflow of the second oil eliminator 11, and the refrigerant of medium temperature and medium pressure is then
Enter from the refrigerant outlet outflow of the second oil eliminator 11 by the first stop valve 12 in the second condenser 13 and condense heat release change
Into liquid refrigerant, it is low after the outflow of the refrigerant outlet of the second condenser 13 after second throttling device 7 to become low temperature
The refrigerant air-liquid mixture of pressure enters evaporator 8 and absorbs amount of heat, the low-temp low-pressure gaseous refrigerant warp after heat absorption evaporation
Cross the entrance that the second gas-liquid separator 9 is inhaled into low pressure compressor 10.Cold water enters in the second condenser 13 after water pump 15
It is heated, because the first condenser 3 does not work, hot water is not heated when flowing through the first condenser 3, finally from the first condenser 3
Water out outflow supply user.
Reference picture 2：
When outdoor environment temperature is near or below 0 DEG C, evaporating temperature can reach less than 0 DEG C, may on the outside of evaporator
Meeting frosting freezes, and now needs to carry out defrost to the evaporator of heat pump water-heating machine.Therefore, in the second condensation on the basis of Fig. 1
The 3rd stop valve 16 is added between the refrigerant outlet of device 2 and the entrance of evaporator 8, and is connected with pipeline, it is possible to achieve heat
Gas bypass defrosting function so that heat pump water-heating machine can more stably be run.In addition to increasing defrost power, this flow can be real
Existing function is such as Fig. 1, and the 3rd stop valve 16 remains turned-off when realizing Fig. 1 pattern.
Hot-gas bypass defrost pattern：First stop valve 12 is opened, the second stop valve 14 is closed, the 3rd stop valve 16 is opened,
High pressure compressor 1 is closed, and low pressure compressor 10 is run, and water pump 15 is closed.The gaseous state refrigerating agent containing oil of HTHP is from low pressure pressure
The outlet of contracting machine 10 is discharged into the second oil eliminator 11, and lubricating oil therein returns from the oil export outflow of the second oil eliminator 11
Return the entrance of low pressure compressor 10, and high temperature liquid refrigerant is then from the outflow of the refrigerant outlet of the second oil eliminator 11 by the
One stop valve 12 and the second condenser 13, because water pump 15 is closed, the second condenser 13 does not work, and high temperature liquid refrigerant does not exist
Exchanged heat in second condenser 13, high temperature liquid refrigerant is after the refrigerant outlet outflow of the second condenser 13 by the 3rd
Enter the heat release of evaporator 8 after stop valve 16 so that evaporator outer wall defrost, refrigerant pass through second from the outlet of evaporator 8 outflow
The entrance of low pressure compressor 10 is finally inhaled into after gas-liquid separator 9.
Reference picture 3：
When environment temperature is of a relatively high, and required hot water temperature is normal, low pressure compressor 10 is used in Fig. 1 embodiment
Single stage compress heating mode is carried out, and the 4th stop valve 17 and the 5th stop valve 18 are added in Fig. 3 so that carries out single-stage pressure
High pressure compressor 1 can also be used during contracting heating, due to the rated power of high pressure compressor 1 and low pressure compressor 10 and cylinder chi
Very little difference, therefore the heating power scope of single stage compress heating mode is expanded, while also improve the utilization of high pressure compressor
Rate.This flow can also realize Fig. 1 and Fig. 2 all operation moulds in addition to it can realize hiigh pressure stage compression single-stage heating mode
Formula, the 4th stop valve 17 need to only be remained turned-off, the 5th stop valve 18 is kept it turned on.
Hiigh pressure stage compresses single-stage heating mode：First stop valve 12, the second stop valve 14, the 3rd stop valve 16, the 5th section
Only valve 18 is closed, and the 4th stop valve 17 is opened, and high pressure compressor 1 is opened with water pump 15, and low pressure compressor 10 is closed.HTHP
Oil-containing gaseous refrigerant exit into the first oil eliminator 2 from the outlet of high pressure compressor 1, the lubricating oil in refrigerating agent containing oil exists
First oil eliminator is separated and outflows back to suction port of compressor from the oil export of the first oil eliminator 2, HTHP
Refrigerant exits into the refrigerant inlet exothermic condensation of the first condenser 3, the liquid of high pressure from the refrigerant outlet of oil eliminator
Refrigerant by subcooler 5 but does not exchange heat from the refrigerant outlet outflow of the first condenser 3, then the liquid outlet from subcooler 5
Outflow, with after check valve 6, passing through second throttling device 7 again, becomes the refrigerant gas of low-temp low-pressure by the 3rd throttling arrangement 19
Liquid mixture enters evaporator 8 and absorbs amount of heat, and the low-temp low-pressure gaseous refrigerant after heat absorption evaporation is by the second gas-liquid point
The entrance of high pressure compressor 1 is returned from device 9 and then by Section of four stop valve 17.Cold water flows through the second condensation after water pump 15
Device 13 but do not heat, then enter back into the first condenser 3 and be heated, become after high-temperature-hot-water from the water out stream of the first condenser 3
Go out to supply user.
Claims (8)
- A kind of 1. efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine, it is characterised in that：Including high pressure compressor, low Press compressor, the first condenser, the second condenser, subcooler and evaporator, the outlet of the high pressure compressor and described first Condenser refrigerant inlet connection, the refrigerant outlet of first condenser all the way by first throttle device with it is described The cooling fluid inlet connection of subcooler, the another way of the refrigerant outlet of first condenser and the supercooling of the subcooler Liquid inlet connects, and the gas vent of the subcooler connects with the entrance of the high pressure compressor, the liquid of the subcooler Outlet connect by the 3rd throttling arrangement, check valve with the entrance of second throttling device, the outlet of the second throttling device and The entrance connection of the evaporator, the outlet of the evaporator connect with the entrance of the low pressure compressor, the low pressure compression The outlet of machine is divided into two strands, and one is connected by the first stop valve with the refrigerant inlet of the second condenser, second condensation The refrigerant outlet of device connects with the entrance of the second throttling device；Another stock-traders' know-how crosses the second stop valve and the subcooler Gas access connects；Total cooling water inlet is connected by water pump with the cooling water inlet of the second condenser, the hot water outlet of second condenser and institute The cooling water inlet connection of the first condenser is stated, the hot water outlet of first condenser is total hot water outlet.
- 2. efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as claimed in claim 1, it is characterised in that：It is described The outlet of evaporator connects with the entrance of gas-liquid separator, the gas vent of the gas-liquid separator and the low pressure compressor Entrance connects.
- 3. efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as claimed in claim 1, it is characterised in that：It is described The outlet of high pressure compressor is connected with the entrance of the first oil eliminator, the oil export of first oil eliminator and the high pressure pressure The entrance connection of contracting machine, the refrigerant outlet of first oil eliminator connect with the refrigerant inlet of first condenser； The outlet of the low pressure compressor is connected with the entrance of the second oil eliminator, the oil export of second oil eliminator with it is described low The entrance connection of compressor is pressed, the refrigerant outlet of second oil eliminator is divided into entrance of two stocks not with the first stop valve And second stop valve entrance connection.
- 4. efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as claimed in claim 2, it is characterised in that：It is described The outlet of high pressure compressor is connected with the entrance of the first oil eliminator, the oil export of first oil eliminator and the high pressure pressure The entrance connection of contracting machine, the refrigerant outlet of first oil eliminator connect with the refrigerant inlet of first condenser； The outlet of the low pressure compressor is connected with the entrance of the second oil eliminator, the oil export of second oil eliminator with it is described low The entrance connection of compressor is pressed, the refrigerant outlet of second oil eliminator is divided into entrance of two stocks not with the first stop valve And second stop valve entrance connection.
- 5. the efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as described in one of claim 1 ~ 4, its feature exist In：Defrost branch pipe, the defrost branch pipe are set between the refrigerant outlet of second condenser and the entrance of the evaporator The 3rd stop valve of upper installation.
- 6. the efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as described in one of claim 1 ~ 4, its feature exist In：The outlet of the evaporator connects by the 4th stop valve with the entrance of the high pressure compressor, the gas of the subcooler Outlet is connected with the entrance of the 5th stop valve, and the outlet of the 5th stop valve is connected with high pressure compressor entrance.
- 7. efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as claimed in claim 5, it is characterised in that：It is described The outlet of evaporator connects by the 4th stop valve with the entrance of the high pressure compressor, the gas vent of the subcooler and The entrance of five stop valves is connected, and the outlet of the 5th stop valve is connected with high pressure compressor entrance.
- 8. efficient big temperature rise single-stage throttling cooling during rolling heat pump water-heating machine as claimed in claim 2, it is characterised in that：It is described The gas vent of gas-liquid separator connects by the 4th stop valve with the entrance of the high pressure compressor, the gas of the subcooler Outlet is connected with the entrance of the 5th stop valve, and the outlet of the 5th stop valve is connected with high pressure compressor entrance.
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| FR2973863B1 (en) * | 2011-04-11 | 2014-12-26 | Aj Tech | HIGH PERFORMANCE BI-STAGE HEAT PUMP |
| CN203336824U (en) * | 2013-05-13 | 2013-12-11 | 江苏琴尔能源科技有限公司 | Dual-pressure air source heat pump hot water set |
| CN205825422U (en) * | 2015-12-25 | 2016-12-21 | 浙江工业大学 | A kind of efficient big temperature rise single-stage throttling intercooling heat pump water-heating machine |
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Application publication date: 20160504 Assignee: Shandong and Yangxin energy Polytron Technologies Inc. Assignor: JIANG University OF TECHNOLOGY Contract record no.: X2023980042382 Denomination of invention: An Efficient High Temperature Rise Single Stage Throttling Intermediate Cooling Heat Pump Water Heater Granted publication date: 20180316 License type: Common License Record date: 20230925 |
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