CN109163476A - Air-source with second vapor injection-water source combined heat-pump heat supply method - Google Patents
Air-source with second vapor injection-water source combined heat-pump heat supply method Download PDFInfo
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- CN109163476A CN109163476A CN201811034534.0A CN201811034534A CN109163476A CN 109163476 A CN109163476 A CN 109163476A CN 201811034534 A CN201811034534 A CN 201811034534A CN 109163476 A CN109163476 A CN 109163476A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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Abstract
The present invention provides a kind of air-source with second vapor injection-water source combined heat-pump heat supply method, electric controller in system can compare current outdoor environment temperature and water source side temperature, in a heating mode, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, select water source heat pump heating mode, when water source side temperature is less than when outdoor environment temperature subtracts setting deviation or water source side temperature is lower than setting value, air source heat pump is selected to heat mode；In cooling mode, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, air source heat pump refrigeration modes are selected, when water source side temperature, which is less than outdoor environment temperature, subtracts setting deviation, select water resource heat pump refrigeration modes；Air source heat pump can be effectively solved to limit in the use of north cold area.
Description
Technical field
The present invention relates to a kind of heat pump system, especially a kind of air-source with second vapor injection-water source combined heat-pump heat supply
Method.
Background technique
Northern China cold district winter universal heating, it is most by the way of coal-fired central heating, it exists simultaneously a small amount of
Discrete areas boiler room and personal electric heater and miniature coal, fuel-oil or fuel-gas boiler etc. carry out warming, energy wave
Bring is the continuous aggravation of environmental pollution while expense.
As a kind of energy conservation and environmental protection technology, air source heat pump has good safety, and installs, using simple, alive
Boundary's range is widely used.Due to being influenced by outdoor environment temperature, normal air source heat pump unit is being lower than subzero 5
DEG C environment in be not normally functioning and face the problems such as heating efficiency is low, delivery temperature is high, seriously limit air source heat pump
Use of this power-saving technology in north cold area.
(patent No.: ZL 200920203070.1, patent name: the quasi- twin-stage of low temperature is empty for another patent of the patentee
Air supply heat pump device) second vapor injection screw compressor and its improved system are used, it can be grown in -20 DEG C or more of low temperature environment
Phase is stable, efficiently runs, the hot water of 50 DEG C of preparation or more, meets wanting for north cold area winter heating and health hot water
It asks.Above-mentioned patented technology is further improved by the present invention, and providing one kind can be realized independently using air-source and water source two
Kind mode carries out heating and refrigeration, and automatically selects answering for efficiency highest operational mode according to air themperature and water source temperature condition
Mould assembly heat pump has further widened range and flexibility that air source heat pump uses.
Summary of the invention
It is limited to overcome the shortcomings of that air source heat pump is used in north cold area, the present invention provides a kind of band centre benefit
The air-source of gas-water source combined heat-pump heat supply method can be realized and independently be carried out using air-source and water source two ways
Heating and refrigeration, and efficiency highest operational mode is automatically selected according to air themperature and water source temperature, it can effectively solve air-source
Use of the heat pump in north cold area limits.
The technical solution adopted by the present invention to solve the technical problems is: the air-source with second vapor injection-water source compound thermal
Heat supply method is pumped, the specific operation is as follows:
In the case where air source heat pump runs heating mode, the first solenoid valves are opened, and second solenoid valve, third solenoid valve are not
It is powered and closes, the second four-way reversing valve is powered；The exhaust of second vapor injection screw compressor enters a mouth of the first four-way reversing valve,
The a mouth for entering the second four-way reversing valve after b mouthfuls of discharges, is then discharged, into domestic hot water side heat exchanger, with circulating water from d mouthfuls
After system heat exchange, enter liquid storage device by the 5th check valve, the h of economizer is entered by device for drying and filtering after coming out from liquid storage device
Mouthful, it is flowed out after heat exchange from j mouthfuls, is divided into two-way, enter the k mouth of economizer by tonifying Qi electric expansion valve all the way, in economizer
Through entering the gas supplementing opening y of second vapor injection screw compressor by i mouthfuls after heat absorption；Another way is led to after the throttling of main electric expansion valve
It crosses the first solenoid valve and the first check valve enters finned tube exchanger, after the heat in air is absorbed in finned tube exchanger,
Into the b mouth of the second four-way reversing valve, flowed out from c mouthfuls after entering gas-liquid separator progress gas-liquid separation, gas returns to intermediate benefit
The air entry x of gas screw compressor.
In the case where air source heat pump runs refrigeration mode, the first solenoid valve, third solenoid valve is obstructed is electrically turn off, second solenoid valve
It is powered and opens；The exhaust of second vapor injection screw compressor enters a mouth of the first four-way reversing valve, and second is entered after b mouthfuls of discharges
Then a mouth of four-way reversing valve is discharged, into finned tube exchanger, in finned tube exchanger into air after heat release from b mouthfuls
Enter liquid storage device through the 4th check valve, the h mouth of economizer is entered by device for drying and filtering after coming out from liquid storage device, from j after heat exchange
Mouth outflow, is divided into two-way, enters the k mouth of economizer by tonifying Qi electric expansion valve all the way, through by i mouthfuls after exchanging heat in economizer
Into the gas supplementing opening y of second vapor injection screw compressor；Another way after the throttling of main electric expansion valve, by second solenoid valve and
Second one-way valve enters domestic hot water side heat exchanger, after circulation heat exchange, into the d mouth of the second four-way reversing valve, flows from c mouthfuls
After entering gas-liquid separator progress gas-liquid separation out, gas returns to the air entry x of second vapor injection screw compressor.
In the case where water resource heat pump runs heating mode, the first solenoid valve, second solenoid valve are obstructed to be electrically turn off, and third solenoid valve is beaten
It opens, the second four-way reversing valve is powered；The exhaust of second vapor injection screw compressor enters a mouth of the first four-way reversing valve, arranges from b mouthfuls
The a mouth for entering the second four-way reversing valve after out, is then discharged from d mouthfuls, into after domestic hot water side heat exchanger, with water system heat exchange, warp
It crosses the 5th check valve and enters liquid storage device, the h mouth of economizer is entered by device for drying and filtering after coming out from liquid storage device, from j after heat exchange
Mouthful outflow, is divided into two-way, enters k mouth of economizer by tonifying Qi electric expansion valve all the way, in economizer after heat exchange through i mouthfuls into
Enter the gas supplementing opening y of second vapor injection screw compressor；Another way passes through third solenoid valve and the after the throttling of main electric expansion valve
Three check valves enter water source side heat exchanger, and the d mouth of the first four-way reversing valve is entered after absorption heat, enter gas-liquid from c mouthfuls of outflows
After separator carries out gas-liquid separation, gas returns to the air entry x of second vapor injection screw compressor.
In the case where water resource heat pump runs refrigeration mode, second solenoid valve, which is powered, to be opened, and the first solenoid valve, third solenoid valve are obstructed
It is electrically turn off, the first four-way reversing valve is powered；The exhaust of second vapor injection screw compressor enters a mouth of the first four-way reversing valve, then
From d mouthfuls be discharged, into water source side heat exchanger, enter liquid storage device by the 6th check valve after heat release, from liquid storage device come out after by
Device for drying and filtering enters the h mouth of economizer, flows out after heat exchange from j mouthfuls, is divided into two-way, enters all the way by tonifying Qi electric expansion valve
The k mouth of economizer enters the gas supplementing opening y of second vapor injection screw compressor through i mouthfuls after exchanging heat in economizer；Another way is by master
After electric expansion valve throttling, domestic hot water side heat exchanger is entered by second solenoid valve and second one-way valve, is exchanged heat with circulation
Afterwards, it into the d mouth of the second four-way reversing valve, is flowed out from c mouthfuls after entering gas-liquid separator progress gas-liquid separation, gas returns to centre
The air entry x of tonifying Qi screw compressor.
Electric controller in system can compare current outdoor environment temperature and water source side temperature, heat
Under mode, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, water source heat pump heating mode is selected, water is worked as
When source temperature is less than when outdoor environment temperature subtracts setting deviation or water source side temperature is lower than setting value, air-source is selected
Heat pump heats mode；In cooling mode, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, selection is empty
Air supply heat pump refrigeration modes select water resource heat pump system when water source side temperature, which is less than outdoor environment temperature, subtracts setting deviation
Cold mode；The value range of deviation is set as 4~8 DEG C.
The beneficial effects of the present invention are:
1, this method, which can be realized, independently carries out heating and refrigeration using air-source and water source two ways, can be automatic
The highest operational mode of efficiency of selection can effectively solve air source heat pump and limit in the use of north cold area.
2, this system uses economizer, on the one hand can be lowered into the refrigerant of main electric expansion valve than enthalpy, increase
Refrigerant degree of supercooling, improves the operating condition of main electric expansion valve, and the heat that increase system is extracted from low-temperature heat source is freezing
Refrigerating capacity can be increased under mode；On the other hand, the refrigerant for entering second vapor injection screw compressor intermediate fill gas mouth y is carried out
Preheating effectively prevent the refrigerant into second vapor injection screw compressor to contain liquid, prevents compressor Wet Compression, while effectively
The temperature of second vapor injection screw compressor exhaust is reduced, and increases exhaust enthalpy, to increase the heating capacity of system.
It 3, can be in -20 DEG C or more of low temperature ring due to using second vapor injection screw compressor and refrigerant special loop
It is stable for a long time in border, efficiently run, meet the requirement of north cold area winter heating and health hot water.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
In Fig. 1,1. second vapor injection screw compressors, 2. gas-liquid separators, 3. liquid storage devices, 4. finned tube exchangers, 5. is empty
Adjust side heat exchanger, 6. water source side heat exchangers, 7. economizers, 8. first four-way reversing valves, 9. second four-way reversing valves, 10. tonifying Qi
Electric expansion valve, 11. main electric expansion valves, 12. first solenoid valves, 13. second solenoid valves, 14. third solenoid valves, 15. first
Check valve, 16. second one-way valves, 17. third check valves, 18. the 4th check valves, 19. the 5th check valves, 20. the 6th check valves,
21. device for drying and filtering, 22. air-conditioning side water circulating pumps, 23. water source side water circulating pumps.
Specific embodiment
The present invention is described in detail below in conjunction with drawings and examples.
Embodiment one
As shown in Figure 1,1 exhaust outlet z of second vapor injection screw compressor is connected for 8a mouthfuls with the first four-way reversing valve, the first four-way
8b mouthfuls of reversal valve with the second four-way reversing valve 9a mouthfuls be connected, the m mouth phase of the first 8d mouthfuls of four-way reversing valve and water source side heat exchanger 6
Even, the second 9d mouthfuls of four-way reversing valve is connected with the e of domestic hot water side heat exchanger 5 mouth, and the second 9b mouthfuls of four-way reversing valve and finned tube exchange heat
The p mouth of device 4 is connected；After first 8c mouthfuls of four-way reversing valve, 9c mouthfuls of the second four-way reversing valve are in parallel with 2 entrance phase of gas-liquid separator
Even, the outlet of gas-liquid separator 2 is connected with 1 air entry x of second vapor injection screw compressor；The q mouth of finned tube exchanger 4, air-conditioning side
The f mouth of heat exchanger 5, the pipeline of the n mouth side of water source side heat exchanger 6 are respectively divided into two-way, connect the 4th check valve 18, respectively all the way
3 entrance of liquid storage device is parallel-connected to after five check valves 19, the 6th check valve 20, refrigerant can only be from the q of finned tube exchanger 4
Mouth, the f mouth of domestic hot water side heat exchanger 5, water source side heat exchanger 6 entrance from n mouth effluent to liquid storage device 3；Another way is connected respectively to
The outlet of main electric expansion valve 11, be respectively set on being connected to the pipeline that main electric expansion valve 11 exports the first check valve 15,
Second one-way valve 16, third check valve 17 and the first solenoid valve 12, second solenoid valve 13, third solenoid valve 14, refrigerant is only
It can be exported from main electric expansion valve 11 and flow to the q mouth of finned tube exchanger 4, the f mouth of domestic hot water side heat exchanger 5, water source side heat exchanger 6
N mouth；The j mouth of economizer 7 is divided into two-way, is directly connected to the entrance of main electric expansion valve 11 all the way, another way is through tonifying Qi electricity
Sub- expansion valve 10 is connected to the k mouth of economizer 7；The h mouth of economizer 7 is connected with the outlet of device for drying and filtering 21, the i of economizer 7
Mouth is connected with 1 gas supplementing opening y of second vapor injection screw compressor；The outlet of liquid storage device 3 is connected with the entrance of device for drying and filtering 21.
Electric controller of the invention can be compared according to current outdoor environment temperature and water source side temperature, made
Under heat pattern, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, water source heat pump heating mode is selected, when
When water source side temperature is less than when outdoor environment temperature subtracts setting deviation or water source side temperature is lower than setting value, air is selected
Source heat pump heats mode；In cooling mode, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, selection
Air source heat pump refrigeration modes select water resource heat pump when water source side temperature, which is less than outdoor environment temperature, subtracts setting deviation
Refrigeration modes.Deviation is set, and value different according to finned tube exchanger and water source side brazing plate type heat exchanger design parameter
Difference, value range is between 4~8 DEG C under normal conditions.
Embodiment two
As shown in Figure 1, the first solenoid valve 12, which is powered, to be opened, second solenoid valve in the case where air source heat pump runs heating mode
13, third solenoid valve 14 is obstructed is electrically turn off, and the second four-way reversing valve 9 is powered, and the exhaust of second vapor injection screw compressor 1 enters first
The a mouth of four-way reversing valve 8 enters a mouth of the second four-way reversing valve 9 after b mouthfuls of discharges, is then discharged from d mouthfuls, into air-conditioning side
Heat exchanger 5, with circulation heat exchange after, by the 5th check valve 19 enter liquid storage device 3, from liquid storage device 3 come out after through overdrying
Dry filter 21 enters the h mouth of economizer 7, flows out after heat exchange from j mouthfuls, is divided into two-way, passes through tonifying Qi electric expansion valve 10 all the way
It is another through by the i mouthful gas supplementing opening y into second vapor injection screw compressor 1 after exchanging heat in economizer into the k mouth of economizer 7
Road enters finned tube exchanger 4 after the throttling of main electric expansion valve 11, through the first solenoid valve 12 and the first check valve 15,
After absorbing the heat in air in finned tube exchanger 4, into the b mouth of the second four-way reversing valve 9, enter gas-liquid from c mouthfuls of outflows
After separator 2 carries out gas-liquid separation, gas returns to the air entry x of second vapor injection screw compressor 1.
In the case where air source heat pump runs refrigeration mode, the first solenoid valve 12, third solenoid valve 14 is obstructed is electrically turn off, the second electricity
Magnet valve 13, which is powered, to be opened, and the exhaust of second vapor injection screw compressor 1 enters a mouth of the first four-way reversing valve 8, laggard from b mouthfuls of discharges
Enter a mouth of the second four-way reversing valve 9, then from b mouthfuls be discharged, into finned tube exchanger 4, in finned tube exchanger (4) to
In air after heat release, by the 4th check valve 18 enter liquid storage device 3, from liquid storage device 3 come out after by device for drying and filtering 21 enter
The h mouth of economizer 7 flows out from j mouthfuls after heat exchange, is divided into two-way, enters the k of economizer 7 by tonifying Qi electric expansion valve 10 all the way
Mouthful, entered the gas supplementing opening y of second vapor injection screw compressor 1 after exchanging heat in economizer 7 by i mouthfuls, another way passes through main electronics
After expansion valve 11 throttles, domestic hot water side heat exchanger 5 is entered by second solenoid valve 13 and second one-way valve 16, is changed with circulation
After heat, into the d mouth of the second four-way reversing valve 9, flowed out from c mouthfuls after entering the progress gas-liquid separation of gas-liquid separator 2, gas returns to
The air entry x of second vapor injection screw compressor 1.
Embodiment three
As shown in Figure 1, the first solenoid valve 12,13 no power of second solenoid valve close in the case where water resource heat pump runs heating mode
It closes, third solenoid valve 14 is opened, and the second four-way reversing valve 9 is powered, and the exhaust of second vapor injection screw compressor 1 enters the first four-way and changes
To a mouth of valve 8, a mouth of the second four-way reversing valve 9 is entered after b mouthfuls of discharges, is then discharged from d mouthfuls, into domestic hot water side heat exchanger
5, with water system heat exchange after, by the 5th check valve 19 enter liquid storage device 3, from liquid storage device 3 come out after by device for drying and filtering 21
It into the h mouth of economizer 7, is flowed out after heat exchange from j mouthfuls, is divided into two-way, enter economizer 7 by tonifying Qi electric expansion valve 10 all the way
K mouth, enter the gas supplementing opening y of second vapor injection screw compressor 1 after exchanging heat in economizer 7 through i mouthful, another way is by main electronics
After expansion valve 11 throttles, water source side heat exchanger 6 is entered by third solenoid valve 14 and third check valve 17, is entered after absorbing heat
The d mouth of first four-way reversing valve 8 flows out after entering the progress gas-liquid separation of gas-liquid separator 2 from c mouthfuls, returns to second vapor injection vortex
The air entry x of compressor 1.
In the case where water resource heat pump runs refrigeration mode, second solenoid valve 13, which is powered, to be opened, the first solenoid valve 12, third solenoid valve
14 it is obstructed be electrically turn off, the first four-way reversing valve 8 is powered, and the exhaust of second vapor injection screw compressor 1 enters first four-way reversing valve 8
It a mouthfuls, is then discharged from d mouthfuls, into water source side heat exchanger 6, enters liquid storage device 3 by the 6th check valve 20 after heat release, from liquid storage
Device 3 enters the h mouth of economizer 7 by device for drying and filtering 21 after coming out, flow out after heat exchange from j mouthfuls, be divided into two-way, all the way through overfill
Gas electric expansion valve 10 enters the k mouth of economizer 7, enters second vapor injection screw compressor 1 through i mouthfuls after exchanging heat in economizer 7
Gas supplementing opening y, another way after the throttling of main electric expansion valve 11, pass through second solenoid valve 13 and second one-way valve 16 enter it is empty
Side heat exchanger 5 is adjusted, after circulation heat exchange, into the d mouth of the second four-way reversing valve 9, enters gas-liquid separation from c mouthfuls of outflows
After device 2 carries out gas-liquid separation, the air entry x of second vapor injection screw compressor 1 is returned to.
This system uses economizer 7, on the one hand can be lowered into the refrigerant of main electric expansion valve 11 than enthalpy, increase
Refrigerant degree of supercooling, improves the operating condition of main electric expansion valve 11, and the heat that increase system is extracted from low-temperature heat source is being made
Refrigerating capacity can be increased under cold mode；On the other hand, to the refrigerant for entering 1 intermediate fill gas mouth y of second vapor injection screw compressor
It is preheated, effectively prevent containing liquid into the refrigerant of second vapor injection screw compressor 1, prevent compressor Wet Compression,
The temperature of the exhaust of second vapor injection screw compressor 1 is effectively reduced simultaneously, and increases exhaust enthalpy, to increase the heating of system
Amount.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art within the technical scope of the present disclosure, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of air-source with second vapor injection-water source combined heat-pump heat supply method, it is characterised in that: carrying out practically mode is such as
Under:
In the case where air source heat pump runs heating mode, the first solenoid valve (12), which is powered, to be opened, second solenoid valve (13), third electromagnetism
Valve (14) is obstructed to be electrically turn off, and the second four-way reversing valve (9) is powered；The exhaust of second vapor injection screw compressor (1) enters the one or four
The a mouth of logical reversal valve (8) enters a mouth of the second four-way reversing valve (9) after b mouthfuls of discharges, is then discharged from d mouthfuls, into air-conditioning
After side heat exchanger (5), with circulation heat exchange, enters liquid storage device (3) by the 5th check valve (19), go out from liquid storage device (3)
The h mouth for entering economizer (7) after coming by device for drying and filtering (21), flows out from j mouthfuls after heat exchange, is divided into two-way, all the way through overfill
Gas electric expansion valve (10) enters the k mouth of economizer (7), through entering second vapor injection scroll compression by i mouthfuls after exchanging heat in economizer
The gas supplementing opening y of contracting machine (1)；Another way is single by the first solenoid valve (12) and first after main electric expansion valve (11) throttle
Enter finned tube exchanger (4) to valve (15), after the heat in air is absorbed in finned tube exchanger (4), into the two or four
The b mouth of logical reversal valve (9) is flowed out from c mouthfuls after entering gas-liquid separator (2) progress gas-liquid separation, and gas returns to second vapor injection whirlpool
Revolve the air entry x of compressor (1)；
In the case where air source heat pump runs refrigeration mode, the first solenoid valve (12), third solenoid valve (14) is obstructed is electrically turn off, the second electricity
Magnet valve (13), which is powered, to be opened；The exhaust of second vapor injection screw compressor (1) enters a mouth of the first four-way reversing valve (8), from b mouthfuls
The a mouth for entering the second four-way reversing valve (9) after discharge, is then discharged from b mouthfuls, into finned tube exchanger (4), changes in finned tube
Enter liquid storage device (3) through the 4th check valve (18) after heat release into air in hot device (4), through overdrying after coming out from liquid storage device (3)
Dry filter (21) enters the h mouth of economizer (7), flows out after heat exchange from j mouthfuls, is divided into two-way, passes through tonifying Qi electronic expansion all the way
Valve (10) enters the k mouth of economizer (7), through entering second vapor injection screw compressor (1) by i mouthfuls after heat exchange in economizer (7)
Gas supplementing opening y；Another way passes through second solenoid valve (13) and second one-way valve (16) after main electric expansion valve (11) throttle
Into domestic hot water side heat exchanger (5), after circulation heat exchange, into the d mouth of the second four-way reversing valve (9), flowed out from c mouthfuls into
After entering gas-liquid separator (2) progress gas-liquid separation, gas returns to the air entry x of second vapor injection screw compressor (1)；
In the case where water resource heat pump runs heating mode, the first solenoid valve (12), second solenoid valve (13) is obstructed is electrically turn off, third electromagnetism
Valve (14) is opened, and the second four-way reversing valve (9) is powered；Second vapor injection screw compressor (1) exhaust enters the first four-way reversing valve
(8) a mouth enters a mouth of the second four-way reversing valve (9) after b mouthfuls of discharges, is then discharged from d mouthfuls, into domestic hot water side heat exchanger
(5), and after water system heat exchange, enter liquid storage device (3) by the 5th check valve (19), by drying after coming out from liquid storage device (3)
Filter (21) enters the h mouth of economizer (7), flows out after heat exchange from j mouthfuls, is divided into two-way, passes through tonifying Qi electric expansion valve all the way
(10) the k mouth for entering economizer (7), enters the benefit of second vapor injection screw compressor (1) in economizer (7) through i mouthfuls after heat exchange
Port y；Another way is entered after main electric expansion valve (11) throttle by third solenoid valve (14) and third check valve (17)
Water source side heat exchanger (6) absorbs d mouth for entering the first four-way reversing valve (8) after heat, flows out from c mouthful into gas-liquid separator
(2) after carrying out gas-liquid separation, gas returns to the air entry x of second vapor injection screw compressor (1)；
In the case where water resource heat pump runs refrigeration mode, second solenoid valve (13), which is powered, to be opened, the first solenoid valve (12), third solenoid valve
(14) obstructed to be electrically turn off, the first four-way reversing valve (8) is powered；Second vapor injection screw compressor (1) exhaust enters the first four-way and changes
It to a mouth of valve (8), is then discharged from d mouthfuls, into water source side heat exchanger (6), enters after heat release by the 6th check valve (20) and store up
Liquid device (3) enters the h mouth of economizer (7) by device for drying and filtering (21) after coming out from liquid storage device (3), flow after heat exchange from j mouthfuls
Out, it is divided into two-way, enters the k mouth of economizer (7) by tonifying Qi electric expansion valve (10) all the way, in economizer (7) after heat exchange
Enter the gas supplementing opening y of second vapor injection screw compressor (1) through i mouthfuls；Another way passes through after main electric expansion valve (11) throttle
Second solenoid valve (13) and second one-way valve (16) enter domestic hot water side heat exchanger (5), after circulation heat exchange, into second
The d mouth of four-way reversing valve (9) is flowed out from c mouthfuls after entering gas-liquid separator (2) progress gas-liquid separation, and gas returns to second vapor injection
The air entry x of screw compressor (1).
2. the air-source with second vapor injection-water source combined heat-pump heat supply method as described in claim 1, it is characterised in that: be
Electric controller in system can compare current outdoor environment temperature and water source side temperature, in a heating mode, when
When water source side temperature subtracts setting deviation greater than outdoor environment temperature, water source heat pump heating mode is selected, when water source side temperature
When subtracting setting deviation less than outdoor environment temperature or when water source side temperature is lower than setting value, air source heat pump heating is selected
Mode；In cooling mode, when water source side temperature, which is greater than outdoor environment temperature, subtracts setting deviation, air source heat pump is selected
Refrigeration modes select water resource heat pump refrigeration modes when water source side temperature, which is less than outdoor environment temperature, subtracts setting deviation；If
The value range for determining deviation is 4~8 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109780748A (en) * | 2019-03-14 | 2019-05-21 | 哈尔滨工业大学 | Blowdown ultra-low-loop temperature air source heat pump unit and its heating refrigerating operation method |
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| CN102207334A (en) * | 2011-07-15 | 2011-10-05 | 江苏天舒电器有限公司 | Intelligent heat source switching heat pump water heater and control method thereof |
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| CN101900448A (en) * | 2009-06-01 | 2010-12-01 | 特灵空调***(中国)有限公司 | Steam jet enthalpy heat pump air-conditioning hot water unit |
| CN201476406U (en) * | 2009-09-04 | 2010-05-19 | 大连中星科技开发有限公司 | Low-temperature quasi-two-stage air source heat pump unit |
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| CN109780748A (en) * | 2019-03-14 | 2019-05-21 | 哈尔滨工业大学 | Blowdown ultra-low-loop temperature air source heat pump unit and its heating refrigerating operation method |
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Application publication date: 20190108 |