CN103388922A - Dual-compressor multifunctional air source heat pump air conditioner system - Google Patents

Dual-compressor multifunctional air source heat pump air conditioner system Download PDF

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Publication number
CN103388922A
CN103388922A CN2013103291080A CN201310329108A CN103388922A CN 103388922 A CN103388922 A CN 103388922A CN 2013103291080 A CN2013103291080 A CN 2013103291080A CN 201310329108 A CN201310329108 A CN 201310329108A CN 103388922 A CN103388922 A CN 103388922A
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compressor
valve
communicated
pass line
heat exchanger
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CN2013103291080A
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CN103388922B (en
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董建锴
姜益强
张欣然
姚杨
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Harbin Institute of Technology
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Harbin Institute of Technology
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Abstract

A dual-compressor multifunctional air source heat pump air conditioner system relates to a heat pump air conditioner system and solves the problem that during operation in winter, a test air conditioner cannot meet the dual demands on heating and making hot water due to insufficient power and the problem that at the beginning of the operation, due to higher heat exchange efficiency of a heat exchanger, the retention of refrigerant in a condenser is easily caused to lead to insufficient refrigerant circulation amount and incapability of normal work of the system. The system comprises a first compressor, a throttle device, a four-way reversing valve, an indoor unit, an outdoor unit and a gas-liquid separator, and also comprises a second compressor, a first capillary pipe, a hot water tank, a circulation pump, the heat exchanger, a check valve, a first bypass pipeline, a first cutting off valve and at least one second cutting off valve; the first and second compressors are arranged in parallel; the indoor unit is communicated with the throttle device; and the four-way reversing valve is communicated with the gas-liquid separator. The dual-compressor multifunctional air source heat pump air conditioner system is used for the heating, refrigerating and making hot water of a multifunctional air source heat pump air conditioner system.

Description

A kind of double-compressor multifunctional air source heat pump air-conditioning system
Technical field
The present invention relates to a kind of heat pump type air conditioning system, be specifically related to a kind of double-compressor multifunctional air source heat pump air-conditioning system.
Background technology
When present experiment moves in the winter time with air conditioner and water heater, because underpower usually can not meet the dual requirements of heat supply and hot water preparing simultaneously, and can't realize also that when not needing hot water preparing heat supply is preferential, has increased the energy consumption of system to a certain extent.And while bringing into operation, the water-to-water heat exchanger heat exchange efficiency is higher, easily causes the delay of cold-producing medium in condenser, causes the refrigerant circulation quantity not sufficient, and air conditioner and water heater can't work.
Summary of the invention
The present invention is for solving existing experiment while with air conditioner and water heater, moving in the winter time, because of underpower, can not meet simultaneously the dual requirements of heat supply and hot water preparing, and while bringing into operation, because the heat exchanger heat exchange efficiency is higher, easily cause the delay of cold-producing medium in condenser, cause the refrigerant circulation quantity not sufficient, the problem that system can't work, and then a kind of double-compressor multifunctional air source heat pump air-conditioning system is provided.
The present invention addresses the above problem the technical scheme of taking to be: a kind of double-compressor multifunctional air source heat pump air-conditioning system of the present invention comprises the first compressor, throttling arrangement, four-way change-over valve, indoor set, off-premises station and gas-liquid separator; It also comprises the second compressor, the first capillary, hot-water cylinder, circulating pump, heat exchanger, check valve, the first by-pass line, the first block valve and at least one the second block valve;
the first compressor and the second compressor parallel setting, the outlet of the first compressor and the second compressor all is communicated with the first entrance of heat exchanger, the first outlet of heat exchanger is communicated with four-way change-over valve, four-way change-over valve is communicated with indoor set, indoor set is communicated with off-premises station by throttling arrangement, off-premises station is communicated with check valve, check valve and the first capillary, the first capillary is communicated with the entrance of gas-liquid separator, the outlet of gas-liquid separator is communicated with the entrance of the first compressor and the entrance of the second compressor respectively, off-premises station is communicated with four-way change-over valve, four-way change-over valve is communicated with gas-liquid separator, the second outlet of heat exchanger is communicated with hot-water cylinder, hot-water cylinder is communicated with circulating pump, circulating pump is communicated with the second entrance of heat exchanger, the two ends of described off-premises station also are connected to the first by-pass line, be provided with the first block valve on the first by-pass line, one end of the first by-pass line is communicated with four-way change-over valve, the other end of the first by-pass line is communicated with the first throttle device, at least one second block valve is installed on the pipeline of the off-premises station between the first by-pass line two ends.
the invention has the beneficial effects as follows: one, the first compressor of the present invention and the second compressor move jointly, can solve the problem of heating power deficiency, cold-producing medium is through the first compressor and the second compressor compresses, by the heat exchanger heat release of feeding water, flow through again four-way change-over valve, continue and room air condensation heat release at indoor set, then, through the first throttle device, the off-premises station evaporation endothermic (because of capillary resistance large, therefore this capillary branch road is for opening circuit), get back to the first compressor and the second compressor by gas-liquid separator finally, guaranteed that requirement that indoor heating and hot water preparing supply simultaneously (at this moment, the blower fan of indoor set and the blower fan of off-premises station are all opened), realized the dual requirements of heat supply and hot water preparing, two, the present invention has set up the first by-pass line, the first block valve and at least one second block valve, high-temperature high-pressure refrigerant out passes through heat exchanger from the first compressor, the condensation of refrigerant heat release, water raises through the heat exchanger endothermic temperature simultaneously, cold-producing medium is through four-way change-over valve and the first by-pass line, directly with throttling arrangement, be connected, at this moment, (cold-producing medium does not pass through outdoor condenser to the condenser of off-premises station by bypass, and the blower fan of off-premises station does not move), then, cold-producing medium enters indoor set and room air heat exchange, evaporation endothermic, get back to the first compressor finally by crossing gas-liquid separator, water is stored in hot-water cylinder after heat exchanger is heated, flow by circulating pump controlled circulation water, while as family expenses, having a bath, open water compensating valve 19 moisturizings.at this moment, the first block valve is opened, the second block valve is closed, for preventing that cold-producing medium is trapped in outdoor condenser, cause circulating mass of refrigerant (refrigerating capacity) inadequate, suction pressure of compressor is too low, cause system normally to move, increase check valve, capillary and corresponding bypass line, by the condenser of off-premises station through check valve, capillary and respective branch pipeline directly draw the return-air liquid/gas separator, the cold-producing medium that is detained can directly flow back to the first compressor through gas-liquid separator along the branch road pipeline, and then solved existing practicality while with air conditioner and water heater, bringing into operation, because hot device heat exchange efficiency is higher, easily cause the delay of cold-producing medium in condenser, cause the refrigerant circulation quantity not sufficient, the problem that can't work, three, the present invention is simple in structure, reasonable in design, diverse in function, integrated rate is high, have separate refrigeration, separately heat supply, refrigeration hold concurrently water heating, heat supply hold concurrently water heating, the function of hot water preparing, dehumidifying and defrosting separately, meet the demand that winter and summer uses, stable and reliable operation of the present invention, Energy Efficiency Ratio (air-conditioning power and hot water preparing power sum are divided by power consumption) reaches more than 7, Energy Efficiency Ratio is larger, system effectiveness is higher, and is more energy-conservation, the obvious efficient energy-saving of the present invention.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention, Fig. 2 is the structural representation under the double hot water preparing operating mode of refrigeration, Fig. 3 is the structural representation under the separate refrigeration operating mode, Fig. 4 is the structural representation that supplies separately under thermal condition, Fig. 5 is the structural representation under independent hot water preparing operating mode, Fig. 6 is hold concurrently structural representation under the hot water preparing operating mode of heat supply, and Fig. 7 is that Fig. 8 is the structural representation under defrosting operating condition except the structural representation under wet cooling condition.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1-Fig. 8, present embodiment is described, a kind of double-compressor multifunctional air source heat pump air-conditioning system of present embodiment comprises the first compressor 1, throttling arrangement 10, four-way change-over valve 4, indoor set 11, off-premises station 5 and gas-liquid separator 9; It is characterized in that: it also comprises the second compressor 12, the first capillary 8, hot-water cylinder 13, circulating pump 3, heat exchanger 2, check valve 7, the first by-pass line 6, the first block valve 16 and at least one the second block valve 17;
the first compressor 1 and the second compressor 12 are arranged in parallel, the outlet of the first compressor 1 and the second compressor 12 all is communicated with the first entrance 2-1 of heat exchanger 2, the first outlet 2-2 of heat exchanger 2 is communicated with four-way change-over valve 4, four-way change-over valve 4 is communicated with indoor set 11, indoor set 11 is communicated with off-premises station 5 by throttling arrangement 10, off-premises station 5 is communicated with check valve 7, check valve 7 and the first capillary 8, the first capillary 8 is communicated with the entrance of gas-liquid separator 9, the outlet of gas-liquid separator 9 is communicated with the entrance of the first compressor 1 and the entrance of the second compressor 12 respectively, off-premises station 5 is communicated with four-way change-over valve 4, four-way change-over valve 4 is communicated with gas-liquid separator 9, the second outlet 2-3 of heat exchanger 2 is communicated with hot-water cylinder 13, hot-water cylinder 13 is communicated with circulating pump 3, circulating pump 3 is communicated with the second entrance 2-4 of heat exchanger 2, the two ends of described off-premises station 5 also are connected to the first by-pass line 6, be provided with the first block valve 16 on the first by-pass line 6, one end of the first by-pass line 6 is communicated with four-way change-over valve 4, the other end of the first by-pass line 6 is communicated with first throttle device 10, at least one second block valve 17 is installed on the pipeline of the off-premises station 5 between the first by-pass line 6 two ends.
Present embodiment can be carried out moisturizing by water compensating valve 19.
The specific embodiment two: in conjunction with Fig. 1, present embodiment is described, the described throttling arrangement 10 of present embodiment is capillary.So arrange, during refrigeration, capillary will make its liquid refrigerant that becomes low pressure by throttling expansion, then enter evaporimeter from condenser high pressure liquid refrigerant out, can play good throttling action.Other is identical with the specific embodiment one.
The specific embodiment three: in conjunction with Fig. 1, present embodiment is described, the described throttling arrangement 10 of present embodiment is electric expansion valve.So arrange, can effectively modulate the degree of condensation of cryogen throttling when indoor set, thereby more effectively shorten defrosting time and improve indoor heating environment in defrost process.Other is identical with the specific embodiment one.
The specific embodiment four: in conjunction with Fig. 1, present embodiment is described, the described circulating pump 3 of present embodiment is variable frequency pump.So arrange, can control well the consumption of supplying hot water, meet the needs of actual heat supply and hot water preparing.Other and the specific embodiment one, two or three identical.
The specific embodiment five: in conjunction with Fig. 1, present embodiment is described, the described heat exchanger 2 of present embodiment is plate type heat exchanger.So arrange, can produce turbulent flow under lower Reynolds number, the coefficient of heat transfer is high, and is lightweight, easy and simple to handle.Other is identical with the specific embodiment four.
The specific embodiment six: in conjunction with Fig. 1, present embodiment is described, described the first block valve 16 of present embodiment and at least one second block valve 17 are butterfly valve, ball valve or magnetic valve.So arrange, be convenient to block or connect the medium in pipeline, adopt magnetic valve can realize automatic control, easy to operate.Other and the specific embodiment one, two, three or five identical.
the specific embodiment seven: present embodiment is described in conjunction with Fig. 2-Fig. 8, the described air conditioner and water heater of present embodiment also comprises the second by-pass line 14, the 3rd block valve 15 and at least one the 4th block valve 18, the two ends of described heat exchanger 2 also are connected to the second by-pass line 14, be provided with the second block valve 15 on the second by-pass line 14, one end of the second by-pass line 14 is communicated with four-way change-over valve 4, the other end of the second by-pass line 14 is communicated with the outlet of the first compressor 1 and the outlet of the second compressor 12, at least one the 4th block valve 18 is arranged on the pipeline of the heat exchanger 2 between the two ends of the second by-pass line 14.So arrange, the medium that blocks or connect in pipeline is convenient, and in the situation that hot water amount's abundance, can open the second bypass line, the bypass heat exchanger, make refrigeration machine directly enter indoor set, the heating room air, realize that heat supply is preferential, can realize operating mode and real life needs that water heating, hot water preparing, dehumidifying and defrosting are separately held concurrently in separate refrigeration, heat supply separately, the double water heating of refrigeration, heat supply.Other is identical with the specific embodiment six.
The specific embodiment eight: in conjunction with Fig. 2-Fig. 8, present embodiment is described, described the 3rd block valve 15 of present embodiment and at least one the 4th block valve 18 are butterfly valve, ball valve or magnetic valve.So arrange, be convenient to block or connect the medium in pipeline, adopt magnetic valve can realize automatic control, easy to operate, meet the needs of actual production life.Other is identical with the specific embodiment seven.
Embodiment 1, in conjunction with Fig. 2 explanation, when summer, refrigeration was held concurrently water heating, the first compressor 1 isolated operation (the second compressor is not worked).when the invention system has just brought into operation, the running water temperature is lower, heat exchanger 2 heat exchange efficiencies are higher, the high-temperature gas cold-producing medium that the first compressor 1 is discharged is realized condensation heat exchanger 2 is interior, at this moment, the condenser of off-premises station 5 is by bypass, and the blower fan of off-premises station 5 does not move, high-temperature high-pressure refrigerant out passes through heat exchanger 2 from the first compressor 1, the condensation of refrigerant heat release, the water endothermic temperature raises, cold-producing medium is through four-way change-over valve 4 and the first by-pass line 6, the condenser by off-premises station not, directly with throttling arrangement 10(such as capillary) be connected, then enter indoor set 11 and room air heat exchange, evaporation endothermic, get back to the first compressor 1 finally by crossing gas-liquid separator 9, water is stored in hot-water cylinder 13 after heat exchanger 2 is heated, flow by circulating pump 3 controlled circulation water, when family expenses are had a bath, in servicely can carry out moisturizing by water compensating valve 19.
This moment second, block valve 17 disconnected, for preventing that cold-producing medium is trapped in the condenser of off-premises station, cause the GM Refrigerator Working amount inadequate, the first compressor 1 pressure of inspiration(Pi) is too low, system can't normally be moved, the special condenser that increases by a route off-premises station 5 directly draws the branch road pipeline that check valve 7 and the first capillary 8 are installed of return-air liquid/gas separator 9, and the cold-producing medium of delay can directly flow back to the first compressor 1 along check valve 7 and the first capillary 8.When water temperature reaches uniform temperature, as 40 ℃, absorption condensation is warm fully for water in heat exchanger 2 at this moment, at this moment the second block valve (as magnetic valve) on off-premises station 5 pipelines 17 is opened, and closes the first block valve 16 of the first by-pass line 6, and the cold-producing medium off-premises station 5 of flowing through continues heat releases, the blower fan of off-premises station 5 is also opened automatically, the unnecessary condensation heat of cold-producing medium is discharged in outdoor air, and the assurance system can be moved continuously and stably, can carry out moisturizing by water compensating valve 19.
embodiment 2, in conjunction with Fig. 3 explanation, during normal separate refrigeration, namely when not needing hot water preparing, (open by the 3rd block valve 15 on the second by-pass line 14 by bypass for heat exchanger 2, the 4th block valve 18 is closed), only has the first compressor 1 work (the second compressor 12 is not worked) daytime, cold-producing medium is directly opened through the second by-pass line 14(the 3rd block valve 15) four-way change-over valve 4 flow to off-premises station 5 the condenser condenses heat release (at this moment, the first block valve 16 on the first by-pass line 6 is closed, the second block valve 17 is opened), then pass through throttling arrangement (as capillary) 10, arrive indoor set 11 heat absorptions, flow back to the first compressor 1 finally by crossing gas-liquid separator 9, night load hour, can switch to the second compressor 12 operations, the blower fan of the blower fan of indoor set 11 and off-premises station 5 is all opened, because the first newly-increased capillary 8 is larger than the throttling arrangement on former pipeline (as capillary) 10 resistances, so cold-producing medium all can pass through throttling arrangement 10 flowing through the rear overwhelming majority of off-premises station 5, complete whole circulation, and can directly not get back to the first compressor 1 from the check valve 7 of newly-increased pipeline.
embodiment 3, in conjunction with Fig. 4 explanation, normal separately for thermal condition, namely when not needing hot water preparing, only has the first compressor 1 work (the second compressor 12 is not worked) daytime, cold-producing medium directly through the second by-pass line 14(at this moment, heat exchanger 2 is by bypass, the 3rd block valve 15 on the second by-pass line 14 is opened, the 4th block valve 18 is closed) and four-way change-over valve 4 flow to the condenser condenses heat release of indoor set 11, the heating room air, then pass through throttling arrangement (as capillary) 10, arrive off-premises station 5 heat absorptions (at this moment, the first block valve 16 on the first by-pass line 6 is closed, the second block valve 17 is opened), flow back to the first compressor 1 finally by crossing four-way change-over valve 4 and gas-liquid separator 9, because the first newly-increased capillary 8 is larger than the throttling arrangement on former pipeline (as capillary) 10 resistances, so cold-producing medium all can pass through throttling arrangement 10 flowing through the rear overwhelming majority of off-premises station 5, complete whole circulation, and can directly not get back to the first compressor 1 from the check valve 7 of newly-increased pipeline.Night load hour, can switch to the second compressor 12 operations, the blower fan of the blower fan of indoor set 11 and off-premises station 5 is all opened, because the first newly-increased capillary 8 is larger than the throttling arrangement on former pipeline (as capillary) 10 resistances, overwhelming majority cold-producing medium can directly not return the first compressor 1 through the check valve 7 on newly-increased branch road, but by the condenser of off-premises station 5, completes circulation.
embodiment 4, in conjunction with Fig. 5 explanation, independent hot water preparing operating mode, when starting hot water preparing, the first compressor 1 operation (the second compressor 12 is not worked), produce fast hot water, cold-producing medium is through the first compressor 1 compression, by heat exchanger 2 with the water heating (at this moment, on the second by-pass line 14, the 3rd block valve 15 is closed, the 4th block valve 18 is opened), water is stored in hot-water cylinder 13 after heat exchanger 2 is heated, flow by circulating pump 3 controlled circulation water, then cold-producing medium flows to indoor set 11 by four-way change-over valve 4, but the blower fan of indoor set 11 is not opened, cold-producing medium not with the room air heat exchange, then pass through throttling arrangement 10, by off-premises station 5 evaporation endothermics (at this moment, the first block valve 16 on the first by-pass line 6 is closed, the second block valve 17 is opened, the blower fan of off-premises station 5 is opened, the first capillary 8 resistances of the newly-increased pipeline of cause are large, cold-producing medium can directly not return the first compressor 1 through the check valve 7 on newly-increased branch road, therefore branch road is for opening circuit), get back to the first compressor finally by four-way change-over valve 4 and gas-liquid separator 9 and complete circulation, after the hot water temperature acquires a certain degree, automatically switch into the second compressor operating, continue heat hot water to 50 degree, and insulation, guarantee the system continuous and steady operation in the time of energy-conservation, not having too much heat is discharged into indoor.In servicely can carry out moisturizing by water compensating valve 19.
embodiment 5, in conjunction with Fig. 6 explanation, when Winter heat supply is held concurrently hot water preparing, this moment, the first compressor 1 and the second compressor 12 moved jointly, cold-producing medium is through the first compressor 1 and the second compressor 12 compressions, by heat exchanger 2 heat releases (at this moment, the 3rd block valve 15 on the second by-pass line 14 is closed, the 4th block valve 18 is opened), flow through again four-way change-over valve 4, blower fan at indoor set 11(indoor set 11 is opened) continue and room air condensation heat release, then pass through throttling arrangement 10, blower fan at off-premises station 5(off-premises station 5 is opened) evaporation endothermic is (at this moment, the first block valve 16 on the first by-pass line 6 is closed, the second block valve 17 is opened), large because increasing branch road the first capillary 8 resistances newly, cold-producing medium can directly not return first compressor 1 machine the second compressor 12 through the check valve 7 on newly-increased pipeline, therefore branch road is for opening circuit), get back to the first compressor 1 and the second compressor 12 by four-way change-over valve 4 and gas-liquid separator 9 finally, supply when guaranteeing indoor temperature and hot water.Water is stored in hot-water cylinder 13 after heat exchanger 2 is heated,, by the flow of circulating pump 3 controlled circulation water, also can realize that to a certain extent heat supply is preferential or hot water preparing is preferential by the adjusting of valve, and the present embodiment can solve the problem of heating power deficiency.In servicely can carry out moisturizing by water compensating valve 19.
embodiment 6, in conjunction with Fig. 7 explanation, the dehumidification mode operating mode, the second compressor 12 isolated operations (this moment, the first compressor 1 was not worked), the blower fan of the blower fan of indoor set 11 and off-premises station 5 is all opened, heat exchanger 2 by bypass (at this moment, the 3rd block valve 15 on the second by-pass line 14 is opened, the 4th block valve 18 is closed), cold-producing medium is through the second compressor 12 compressions, directly by the second by-pass line 14 and four-way change-over valve 4, flow to off-premises station 5(this moment, the first block valve 16 on the first by-pass line 6 is closed, the second block valve 17 is opened), large because increasing pipeline the first capillary 8 resistances newly, cold-producing medium can directly not return first compressor 1 machine the second compressor 12 through the check valve 7 on newly-increased branch road, therefore branch road is for opening circuit), the condensation heat release is to outdoor air, then pass through throttling arrangement 10 throttlings, at indoor set 11 evaporation endothermics, the water capacity of room air is reduced, reach the purpose of dehumidifying, get back to the second compressor finally by crossing four-way change-over valve 4 and gas-liquid separator 9, for preventing that indoor temperature from reducing, can open air-conditioning auxiliary electrical heater.
embodiment 7, in conjunction with Fig. 8 explanation, during defrosting mode work, for shortening defrosting time, the first compressor 1 and the second compressor 12 move simultaneously, circulating pump is opened, the blower fan of indoor set 11 does not move, the fan operation of off-premises station 5, cold-producing medium is out flowed through heat exchanger (at this moment from the first compressor 1 and the second compressor 12, the 3rd block valve 15 on the second by-pass line 14 is closed, the 4th block valve 18 is opened), the hot water heat exchange that stores in filling with hot water, cold-producing medium is preheated, then through the condenser of four-way change-over valve 4 and off-premises station 5 (at this moment, the first block valve 16 on the first by-pass line 6 is closed, the second block valve 17 is opened, large because increasing branch road the first capillary 8 resistances newly, cold-producing medium can directly not return first compressor 1 machine the second compressor 12 through the check valve 7 on newly-increased branch road, therefore branch road is for opening circuit), condensation heat release defrost, then pass through throttling arrangement 10, flow to indoor set 11 heat absorptions, then get back to the first compressor 1 and the second compressor 12 through four-way change-over valve 4 and gas-liquid separator 9.By the flow of circulating pump 3 controlled circulation water, at this moment, use the pre-warm refrigerant of hot water of having produced in water tank 13,, from the heat of room air absorption, also can reduce the energy consumption of auxiliary electrical heater in the time of reducing defrosting.

Claims (8)

1. double-compressor multifunctional air source heat pump air-conditioning system, it comprises the first compressor (1), throttling arrangement (10), four-way change-over valve (4), indoor set (11), off-premises station (5) and gas-liquid separator (9); It is characterized in that: it also comprises the second compressor (12), the first capillary (8), hot-water cylinder (13), circulating pump (3), heat exchanger (2), check valve (7), the first by-pass line (6), the first block valve (16) and at least one the second block valve (17);
the first compressor (1) and the second compressor (12) are arranged in parallel, the outlet of the first compressor (1) and the second compressor (12) all is communicated with first entrance (2-1) of heat exchanger (2), the first outlet (2-2) of heat exchanger (2) is communicated with four-way change-over valve (4), four-way change-over valve (4) is communicated with indoor set (11), indoor set (11) is communicated with off-premises station (5) by throttling arrangement (10), off-premises station (5) is communicated with check valve (7), check valve (7) and the first capillary (8), the first capillary (8) is communicated with the entrance of gas-liquid separator (9), the outlet of gas-liquid separator (9) is communicated with the entrance of the first compressor (1) and the entrance of the second compressor (12) respectively, off-premises station (5) is communicated with four-way change-over valve (4), four-way change-over valve (4) is communicated with gas-liquid separator (9), the second outlet (2-3) of heat exchanger (2) is communicated with hot-water cylinder (13), hot-water cylinder (13) is communicated with circulating pump (3), circulating pump (3) is communicated with second entrance (2-4) of heat exchanger (2), the two ends of described off-premises station (5) also are connected to the first by-pass line (6), be provided with the first block valve (16) on the first by-pass line (6), one end of the first by-pass line (6) is communicated with four-way change-over valve (4), the other end of the first by-pass line (6) is communicated with first throttle device (10), at least one second block valve (17) is installed on the pipeline of the off-premises station (5) between the first by-pass line (6) two ends.
2. a kind of double-compressor multifunctional air source heat pump air-conditioning system according to claim 1, it is characterized in that: described throttling arrangement (10) is capillary.
3. a kind of pair of compressed air source hot pump air conditioner and water heater according to claim 1, it is characterized in that: described throttling arrangement (10) is electric expansion valve.
4. according to claim 1,2 or 3 described a kind of double-compressor multifunctional air source heat pump air-conditioning systems, it is characterized in that: described circulating pump (3) is variable frequency pump.
5. a kind of double-compressor multifunctional air source heat pump air-conditioning system according to claim 4, it is characterized in that: described heat exchanger (2) is plate type heat exchanger.
6. according to claim 1,2,3 or 5 described a kind of double-compressor multifunctional air source heat pump air-conditioning systems, it is characterized in that: described the first block valve (16) and at least one the second block valve (17) are butterfly valve, ball valve or magnetic valve.
7. a kind of double-compressor multifunctional air source heat pump air-conditioning system according to claim 6, it is characterized in that: described air conditioner and water heater also comprises the second by-pass line (14), the 3rd block valve (15) and at least one the 4th block valve (18), the two ends of described heat exchanger (2) also are connected to the second by-pass line (14), be provided with the second block valve (15) on the second by-pass line (14), one end of the second by-pass line (14) is communicated with four-way change-over valve (4), the other end of the second by-pass line (14) is communicated with the outlet of the first compressor (1) and the outlet of the second compressor (12), at least one the 4th block valve (18) is arranged on the pipeline of the heat exchanger (2) between the two ends that are positioned at the second by-pass line (14).
8. a kind of double-compressor multifunctional air source heat pump air-conditioning system according to claim 7, it is characterized in that: described the 3rd block valve (15) and at least one the 4th block valve (18) are butterfly valve, ball valve or magnetic valve.
CN201310329108.0A 2013-07-31 2013-07-31 Dual-compressor multifunctional air source heat pump air conditioner system Active CN103388922B (en)

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CN104896579A (en) * 2014-03-03 2015-09-09 三菱电机株式会社 Air conditioner device
CN105115185A (en) * 2015-07-24 2015-12-02 广东美的暖通设备有限公司 Multifunctional air conditioner
CN106568241A (en) * 2016-11-09 2017-04-19 青岛海尔空调器有限总公司 Air conditioner and control method
CN110398099A (en) * 2019-07-26 2019-11-01 广东美的暖通设备有限公司 Heat pump system and its control method and air conditioner

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