CN208595732U - Heat pump circulation system of compound defrosting - Google Patents

Heat pump circulation system of compound defrosting Download PDF

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Publication number
CN208595732U
CN208595732U CN201821168148.6U CN201821168148U CN208595732U CN 208595732 U CN208595732 U CN 208595732U CN 201821168148 U CN201821168148 U CN 201821168148U CN 208595732 U CN208595732 U CN 208595732U
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China
Prior art keywords
heat exchanger
compressor
defrosting
valve
flash vessel
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CN201821168148.6U
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Chinese (zh)
Inventor
吴梅
吴一梅
陈志杰
桂涛
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The utility model discloses a heat pump circulation system of compound defrosting. The system comprises: compressor, cross valve, indoor heat exchanger and flash vessel, be equipped with a tonifying qi pipeline between flash vessel and the compression chamber, wherein, be equipped with first solenoid valve (11) on the pipeline between cross valve (2) and indoor heat exchanger (7), draw a branch road on tonifying qi pipeline (9), be equipped with second solenoid valve (13) on this branch road, the other end and the compressor admission line of this branch road converge, compressor exhaust duct draws forth a bypass (14) with flash vessel (5) intercommunication, is equipped with third expansion valve (15) on this bypass. The utility model discloses a compound defrosting method that reverse defrosting and steam bypass defrosting combined together directly utilizes the existing equipment of system, need not increase vapour and liquid separator's volume for the defrosting flow has accelerated moreover, has shortened the defrosting time.

Description

A kind of heat pump circulating system of compound defrosting
Technical field
The utility model relates to air-conditioning technical fields more particularly to a kind of Two-stage Compression air source heat pump of compound defrosting to follow Loop system.
Background technique
Defrost problem is the big problem that low-temperature air source heat pump system encounters in application process.
In routine techniques, air source heat pump largely uses inverse defrosting mode, needs to absorb heat from indoor medium, lead It causes comfort to reduce, or indoor heat exchanger is brought the risk that aqueous medium freezes occur.Also have in the prior art and utilizes hot gas Defrost method is bypassed, compressor air-discharging is mainly introduced directly into outdoor heat exchanger by this method, returns to vapour-liquid after melting frost layer Separator, this method need vapour liquid separator to have biggish capacity.
Therefore, how to solve the above problems, propose that a kind of preferable defrosting system is industry technical problem urgently to be resolved.
Utility model content
The utility model proposes a kind of heat pump circulating systems of compound defrosting.The utility model uses compound defrosting mode, It solves the problems, such as to need to relax caused by vapour liquid separator increase-volume and inverse defrosting using hot gas bypass defrosting in the prior art The problem of adaptive reduces.
The utility model proposes a kind of heat pump circulating systems of compound defrosting, comprising: compressor, four-way valve, indoor and outdoor Heat exchanger, flash vessel and expansion valve, between the flash vessel and compression chamber be equipped with a tonifying Qi pipeline, wherein the four-way valve with Pipeline between indoor heat exchanger is equipped with the first solenoid valve, draws a branch on the tonifying Qi pipeline, and branch road is equipped with the Two solenoid valves, the other end and the compressor inleting pipe road of the branch converge, and the compressor air-discharging pipeline draws one and flash vessel The bypass of connection, the bypass are equipped with third expansion valve.
The compressor is connected to the four-way valve, and one end of the outdoor heat exchanger and an interface of four-way valve connect It connects, the other end is connected to by the first expansion valve with flash vessel, and the flash vessel passes through the one of the second expansion valve and indoor heat exchanger A port connection, another port of the indoor heat exchanger pass through an orifice of the first solenoid valve and four-way valve, institute An interface for stating four-way valve is connected to vapour liquid separator, and the vapour liquid separator is connected to the admission line of compressor.
The utility model proposes heat pump circulating system include refrigeration, heating and defrosting three kinds of operational modes.
In defrosting mode: closing the first solenoid valve, third solenoid valve, open second solenoid valve;First expansion valve is complete It opens, the second expansion valve is fully closed, opens third expansion valve;Outdoor heat exchanger blower fan is closed, system is switched into refrigeration mode operation.
In refrigeration mode: opening the first solenoid valve, third solenoid valve, close second solenoid valve;The first expansion valve is opened, Second expansion valve closes third expansion valve;System is switched into refrigeration mode operation.
In heating mode: opening the first solenoid valve, third solenoid valve, close second solenoid valve;The first expansion valve is opened, Second expansion valve closes third expansion valve;System is switched into heating mode operation.
The compound Defrost method that the utility model uses inverse defrosting to combine with hot gas bypass defrosting directly utilizes system Existing equipment does not need the volume for increasing vapour liquid separator, and accelerates defrosting process, shortens defrosting time.
Detailed description of the invention
Fig. 1 is the schematic diagram of the existing Two-stage Compression air source heat pump circulatory system;
Fig. 2 is the schematic diagram of the utility model Two-stage Compression air source heat pump circulatory system;
Fig. 3 is the pressure-enthalpy chart of Tthe utility model system defrost process.
Specific embodiment
The utility model is described in detail with reference to the accompanying drawings and examples.
Fig. 1 is the schematic diagram of the existing Two-stage Compression air source heat pump circulatory system.The system includes: successively to be connected with pipeline Compressor 1, four-way valve 2, outdoor heat exchanger 3, the first expansion valve 4, flash vessel 5, the second expansion valve 6, indoor heat exchanger 7 and vapour Liquid/gas separator 8.Compressor uses double-stage compressor, and flash vessel has 3 ports, One In and Two Out, flash vessel upper end draw one with The tonifying Qi pipeline 9 of compressor high pressure chest connection is simultaneously controlled by third solenoid valve 10.The system uses refrigeration cycle in defrosting, System needs to absorb heat from indoor medium, causes comfort to reduce, indoor heat exchanger will appear the case where aqueous medium freezes.
The utility model proposes a kind of new defrosting circulation side on the basis of the existing two-stage compression heat pump circulatory system The fraction of compressor air-discharging is passed through flash vessel by formula, a large amount of refrigerants for stockpiling in heating flash evaporation device, is increased compressor and is inhaled Tolerance improves the heating capacity of unit;Most of outdoor heat exchange that introduces of compressor air-discharging is subjected to defrost.For this purpose, this is practical new The structure of flash vessel is changed to two into two and gone out by type, during defrost, flash vessel is directly served as vapour liquid separator and is used.This Outside, the first, second solenoid valve is increased in original system, increases exhaust bypass pipeline and third expansion valve.
As shown in Fig. 2, the utility model proposes the Two-stage Compression air source heat pump circulatory system include: compressor 1, four-way Valve 2, outdoor heat exchanger 3, indoor heat exchanger 7, flash vessel 5.A tonifying Qi pipeline 9, the pipeline are equipped between flash vessel and compression chamber It is controlled by third solenoid valve 10.Pipeline between four-way valve and indoor heat exchanger is equipped with the first solenoid valve 11.Tonifying Qi pipeline One branch 12 of upper extraction, branch road are equipped with second solenoid valve 13, the gas that the other end and vapour liquid separator 8 of the branch are discharged Converge, into compressor air suction mouth.Compressor air-discharging pipeline draws the bypass 14 that is connected to flash vessel, and the bypass is equipped with the Three expansion valves 15.
In above-described embodiment, the outdoor heat exchanger 3 uses finned heat exchanger, and the indoor heat exchanger 7 is changed using casing Hot device, exchanges heat with heating water.
It is opened in Fig. 2 in the first solenoid valve 11, second solenoid valve 13 is closed, in the case that third expansion valve 15 is closed, system Cold/heating process is identical with Fig. 1.
The utility model proposes the air source heat pump circulatory system include three kinds of operational modes: refrigeration, heating and defrosting.
Process of refrigerastion refrigerant flow direction: 1 low pressure chamber of compressor-enters high pressure chest-four-way valve 2-after mixing with second vapor injection Outdoor heat exchanger the 3-the first expansion valve 4-flash vessel 5(second vapor injection passes through 10-compressor of third solenoid valve high pressure chest)-the Two 8-compressors of expansion valve 6-indoor heat exchanger, 7-four-way valve, 2-vapour liquid separator 1.
Heating operations refrigerant flow direction: 1 low pressure chamber of compressor-enters compressor high pressure chest-tetra- after mixing with second vapor injection 2-indoor heat exchanger of port valve the 7-the second expansion valve 6-flash vessel 5(second vapor injection passes through third solenoid valve 10-compressor high pressure Chamber)-first 8-compressor of expansion valve 4-outdoor heat exchanger, 3-four-way valve, 2-vapour liquid separator 1.
Defrost process: if meeting defrost condition, the first solenoid valve 11, third solenoid valve 10 are closed, opens the second electromagnetism Valve 13,4 standard-sized sheet of the first expansion valve, the second expansion valve 6 is fully closed, and third expansion valve 15 is opened, and system switches to refrigeration mode.Four-way The commutation of valve 2 is that compressor air-discharging is connected with outdoor heat exchanger 3, the blower shutdown of outdoor heat exchanger.
Refrigerant flows to: refrigerant state after the compression of compressor 1 is that 1., most of exhaust passes through 2 row of four-way valve to room 2. 3. external heat exchanger 3 is mixed into state with the two phase refrigerant in outdoor heat exchanger, under the swabbing action of compressor, state 3. refrigerant be further condensed into state 4. along the coil pipe of outdoor heat exchanger 3, subsequently into flash vessel 5, and pass through bypass 14 come, and the state after throttling is another part compressed gas mixing 6., and forming state is two phase refrigerant 5., system Refrigerant vapour 5 " enters compressor 1 and enters next round circulation.
Refrigerant vapour main body: 5 " -1. (2.) -3. -4. (6.) -5 ' -5 ";Exhaust bypass: 5 " -1. -6. (4.) -5 ' - 5”。
Fig. 3 is the pressure-enthalpy chart of Tthe utility model system defrost process.
After defrost: the blower booting of outdoor heat exchanger 3 blows away humid air, hereafter closes third expansion valve 15, second Solenoid valve 13 opens the first solenoid valve 11, the second expansion valve 6, and four-way valve 2 switches to heating mode, the first expansion valve 11 and the Two expansion valves 13, third solenoid valve 10 are run according to heating mode.
Relative to conventional inverse defrosting process, the first solenoid valve 11, second solenoid valve 13 are fully closed can be to avoid from interior High pressure refrigerant in heat exchanger 7 is accumulated in vapour liquid separator 8, cause compressor must take out low pressure could allow refrigerant wherein Shwoot.
Relative to conventional hot gas defrosting process, since a part exhaust has been passed through flash vessel, to existing in flash vessel A large amount of two phase heated, increase compressor air suction amount, improve evaporating temperature, thus increase compressor heating Amount can accelerate defrost process, shorten the defrost time.
Above-described embodiment is merely to illustrate specific embodiment of the present utility model.It should be pointed out that for this field Those of ordinary skill for, without departing from the concept of the premise utility, several deformations and variation can also be made, this A little deformations and variation all should belong to the protection scope of the utility model.

Claims (3)

1. a kind of heat pump circulating system of compound defrosting, comprising: compressor, four-way valve, indoor heat exchanger, flash vessel and outdoor are changed Hot device is equipped with a tonifying Qi pipeline between the flash vessel and compression chamber, which is characterized in that the four-way valve (2) and indoor heat exchange Pipeline between device (7) is equipped with the first solenoid valve (11), draws a branch on the tonifying Qi pipeline (9), and branch road is equipped with Second solenoid valve (13), the other end and the compressor inleting pipe road of the branch converge, the compressor air-discharging pipeline draw one with The bypass (14) of flash vessel (5) connection, the bypass are equipped with third expansion valve (15).
2. heat pump circulating system as described in claim 1, which is characterized in that the compressor (1) and the four-way valve (2) are even Logical, one end of the outdoor heat exchanger (3) and an interface of four-way valve connect, and the other end is by the first expansion valve (4) and dodges Steaming device (5) connection, the flash vessel are connected to by the second expansion valve (6) with a port of indoor heat exchanger (7), the interior Another port of heat exchanger passes through an orifice of the first solenoid valve (11) and four-way valve, and one of the four-way valve connects Mouth is connected to vapour liquid separator (8), and the vapour liquid separator is connected to the admission line of compressor.
3. heat pump circulating system as claimed in claim 2, which is characterized in that the outdoor heat exchanger (3) is exchanged heat using fin Device, the indoor heat exchanger (7) use double-tube heat exchanger.
CN201821168148.6U 2018-07-23 2018-07-23 Heat pump circulation system of compound defrosting Active CN208595732U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821168148.6U CN208595732U (en) 2018-07-23 2018-07-23 Heat pump circulation system of compound defrosting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821168148.6U CN208595732U (en) 2018-07-23 2018-07-23 Heat pump circulation system of compound defrosting

Publications (1)

Publication Number Publication Date
CN208595732U true CN208595732U (en) 2019-03-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108679890A (en) * 2018-07-23 2018-10-19 珠海格力电器股份有限公司 Heat pump circulation system for composite defrosting and operation method
WO2023279886A1 (en) * 2021-07-07 2023-01-12 青岛海尔空调电子有限公司 Defrosting method and device for heat pump apparatus, and hot water unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108679890A (en) * 2018-07-23 2018-10-19 珠海格力电器股份有限公司 Heat pump circulation system for composite defrosting and operation method
WO2023279886A1 (en) * 2021-07-07 2023-01-12 青岛海尔空调电子有限公司 Defrosting method and device for heat pump apparatus, and hot water unit

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