CN203323465U - Hot-air bypass defrosting device of air source heat pump water heater - Google Patents
Hot-air bypass defrosting device of air source heat pump water heater Download PDFInfo
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- CN203323465U CN203323465U CN201320200446XU CN201320200446U CN203323465U CN 203323465 U CN203323465 U CN 203323465U CN 201320200446X U CN201320200446X U CN 201320200446XU CN 201320200446 U CN201320200446 U CN 201320200446U CN 203323465 U CN203323465 U CN 203323465U
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Abstract
The utility model discloses a hot-air bypass defrosting device of an air source heat pump water heater, which comprises an air source heat pump water heater and a hot-air bypass defrosting device part, wherein the air source heat pump water heater mainly comprises a compressor (1), a heating solenoid valve (2), a water side heat exchanger (3), a liquid storage device (4), a dry filter (5), an expansion valve (7), an air side heat exchanger (10), an air-liquid separator (14), an air return solenoid valve (15) and a high-low pressure control switch (20); the hot-air bypass defrosting device part mainly comprises a hot-air bypath solenoid valve (18), a one-way valve (8), an air return bypath solenoid valve (13), a throttle mechanism (16) and a refrigerant heater (17); the hot-air bypass valve and the one-way valve are arranged on a pipeline between an exhaust port of the compressor and a liquid inlet of the air side heat exchanger; an air return bypass pipeline and the refrigerant heater are additionally arranged between a liquid outlet of the air side heat exchanger and a liquid inlet of the air-liquid separator; and the air return bypass pipeline is connected with the air return bypath solenoid valve and the throttle mechanism. A working condition of the compressor in a low temperature environment is improved, and the overall running safety and the overall running stability of a heat pump water heater unit are improved effectively.
Description
Technical field
The utility model relates to the air source heat pump defrosting technical field, is especially the hot gas bypass defrosting device of air source hot pump water heater.
Background technology
Air source heat pump is as a kind of pumping installations of heat, and it utilizes the thermodynamic cycle of cold-producing medium, absorbs heat from air, and realizes the transfer of heat.Along with the development of heat pump techniques and perfect, air source heat pump is widely used in the industries such as air conditioner refrigerating, heating hot water.But when air source heat pump moves under low temperature environment in the winter time, according to the heat transfer law, refrigerant in evaporimeter will absorb heat from environment, evaporating temperature must be lower than outdoor environment temperature, when the finned tube surface temperature during lower than the air dew point temperature, airborne steam just can condense, and when this temperature, during lower than 0 ℃, condensation just is deposited in the finned tube surface with the ice crystal form of loosening and forms frost layer.The frosting initial stage, because frosting has increased roughness and the surface area of heating surface, total heat transfer coefficient is increased to some extent, but along with the progressive additive of frost layer, the resistance that air flows through finned tube increases, air mass flow reduces, and causes the evaporation of finned tube inner refrigerant insufficient, and evaporating temperature reduces, the evaporator outlet degree of superheat reduces, refrigerant flow reduces, and the heating capacity decay, cause compressor fault when serious.Therefore, heat pump normal, stable operation under low temperature environment be guaranteed, the defrosting problem of unit must be considered.At present, the most frequently used Defrost mode of air source hot pump water heater has two kinds: reverse cycle defrosting and hot gas bypass defrosting.
Reverse cycle defrosting: this Defrost method passes through four-way change-over valve, change the flow direction of cold-producing medium, the high temperature and high pressure steam that compressor is discharged commutates by cross valve, enters into evaporimeter and is defrosted, when evaporator coil temperature rises to a certain temperature value, defrosting finishes.This Defrost mode; can have influence on the water supply of Teat pump boiler; during defrosting, can't provide for the user hot water of effective water temperature, simultaneously after defrosting; original hot water temperature can reduce; from energy point of view, the loss of this defrost process, be equivalent to the shutdown of twice defrosting time; in addition, cross valve frequently commutates can affect its life and reliability.
Hot gas bypass defrosting: this Defrost method does not change the flow direction of cold-producing medium, and it is constant that unit keeps heating duty in defrost process, and the direct bypass part of high-temperature gas that compressor is discharged is carried out defrosting to evaporimeter.This kind of defrosting mode, because the heat of high-pressure side refrigerant still comes from the heat absorbed in evaporimeter, when temperature is lower, when defrosting is fast not, will not have enough heat absorption, can make main frame enter protectiveness and shut down.As adopt simple bypass, easily produce the liquid hit phenomenon of compressor.Simultaneously, in defrost process, because the compressor air-discharging amount reduces, the effect of heat hot water can be affected, the demand of the normal heat water yield can't be met.
The utility model content
The purpose of this utility model is the deficiency existed for above-mentioned Defrost method, proposes a kind of air source heat pump hot water
Device hot gas bypass defrosting device.This defroster, by improving compressor air suction temperature and pressure, improves the working condition under the compressor low temperature environment, in defrost process, does not affect the hot water water temperature, has effectively improved the safety and stability of Teat pump boiler unit overall operation.
For achieving the above object, the technical solution adopted in the utility model is: a kind of air source hot pump water heater hot gas bypass defrosting device, comprise mainly by compressor, heat magnetic valve, water-side heat, reservoir, device for drying and filtering, expansion valve, air-side heat exchanger, gas-liquid separator, the air source hot pump water heater that return-air magnetic valve and dual pressure control switch form, and mainly by hot gas bypass solenoid valve, check valve, the return-air bypass solenoid valve, the defrosting throttle mechanism, the hot gas bypass defrosting device that the refrigerant heater forms, wherein: hot gas bypass valve and check valve are arranged on the pipeline between described exhaust outlet of compressor and described air-side heat exchanger inlet, increase return-air bypass line and refrigerant heater between the inlet of the liquid outlet of described air-side heat exchanger and described gas-liquid separator, and connect return-air bypass solenoid valve and throttle mechanism on this return-air bypass line.
The utility model is fin-tube heat exchanger at described air-side heat exchanger, and is provided with the fin temperature sensor on fin.
The utility model is plate type heat exchanger or double pipe heat exchanger at described water-side heat.
Throttle mechanism described in the utility model is expansion valve or capillary.
The beneficial effects of the utility model are:
1) compare with conventional heat pump, between air-side heat exchanger outlet and gas-liquid separator import, increase return-air bypass line and the throttle mechanism that defrosts, the refrigerant liquid of the rear condensation that defrosts is carried out to reducing pressure by regulating flow, be conducive to the evaporation of follow-up liquid refrigerant;
2) increase the refrigerant heater, cold-producing medium has been carried out to heat compensation, greatly shortened the defrosting required time; And the power of refrigerant heater can be regulated, can for the demand of heat, be regulated according to system defrosting, realize energy saving and improve the utilization ratio of heat.
3) this defroster passes through to improve compressor air suction temperature and pressure, and prevents compressor air suction band liquid, improves the working condition under the compressor low temperature environment, effectively improves the safety and stability of Teat pump boiler unit overall operation.The defrost process compressor is not shut down, and defrosting time is short, effective, and defrost process does not affect the water heater temperature.
The accompanying drawing explanation
Fig. 1 is structure principle chart of the present utility model.
In figure: 1, compressor, 2, heat magnetic valve, 3, water-side heat, 4, reservoir, 5, device for drying and filtering, 6, liquid-sighting glass, 7, expansion valve, 8, check valve, 9, the fin temperature sensor, 10, air-side heat exchanger, 11, axial flow blower, 12, environment temperature sensor, 13, the return-air bypass solenoid valve, 14, gas-liquid separator, 15, the return-air magnetic valve, 16, the defrosting throttle mechanism, 17, the refrigerant heater, 18, hot gas bypass solenoid valve, 19, the suction temperature sensor, 20, dual pressure control switch, 21, the high-low pressure table, 22, exhaust gas temperature sensor.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, but the utility model does not limit to following examples.
As shown in Figure 1: the described air source hot pump water heater hot gas bypass defrosting of the present embodiment device is mainly by compressor 1 existing, heat magnetic valve 2, water-side heat 3, reservoir 4, device for drying and filtering 5, liquid-sighting glass 6, expansion valve 7, air-side heat exchanger 10, axial flow blower 11, gas-liquid separator 14, return-air magnetic valve 15, suction temperature sensor 19, dual pressure control switch 20, high-low pressure table 21, on the architecture basics of the air source hot pump water heater that exhaust gas temperature sensor 22 forms, also be provided with mainly by hot gas bypass solenoid valve 18, check valve 8, fin temperature sensor 9, environment temperature sensor 12, return-air bypass solenoid valve 13, defrosting throttle mechanism 16, the hot gas bypass defrosting device that refrigerant heater 17 forms.Wherein: hot gas bypass valve 18 and check valve 8 are arranged on the pipeline between compressor 1 exhaust outlet and air-side heat exchanger 10 inlets, and hot gas bypass valve 18 is positioned at the exhaust port side of compressor 1, and check valve 8 is positioned at air-side heat exchanger 10 inlet ends.Increase return-air bypass line and refrigerant heater 17 between air-side heat exchanger 10 liquid outlets and gas-liquid separator 14 inlets, and be connected with return-air bypass solenoid valve 13 and defrosting throttle mechanism 16 on the return-air bypass line.Fin temperature sensor 9 is arranged on air-side heat exchanger 10 centre position fins, and environment temperature sensor 12 is arranged on the unit side housing.Fin temperature and environment temperature by feedback, judge the frosting situation, and then control the start and stop of defrosting program.Refrigerant heater 17(separate case applies for a patent), what defrosting throttle mechanism 16 adopted is expansion valve or capillary (the expansion valve adjustable range is relatively large, but the capillary cost is lower, can be selected as the case may be in practical application).
Air source hot pump water heater is in when normal operation, by compressor 1, heat magnetic valve 2, water-side heat 3, reservoir 4, device for drying and filtering 5, liquid-sighting glass 6, expansion valve 7, air-side heat exchanger 10, axial flow blower 11, return-air magnetic valve 15, refrigerant heater 17, gas-liquid separator 14 and pipeline thereof and form loop.Circulation process is: compressor 1-heat magnetic valve 2-water-side heat 3-reservoir 4-device for drying and filtering 5-liquid-sighting glass 6-expansion valve 7-air-side heat exchanger 10 and axial flow blower 11-return-air magnetic valve 15-refrigerant heater 17-gas-liquid separator 14-compressor 1.Now, heat magnetic valve 2 and open, hot gas bypass solenoid valve 18 is closed; Return-air magnetic valve 15 is opened, and return-air bypass solenoid valve 13 is closed; Refrigerant heater 17 does not start.
Air source hot pump water heater, when defrosting, forms defrost circuit by compressor 1, hot gas bypass solenoid valve 18, check valve 8, air-side heat exchanger 10, return-air bypass solenoid valve 13, throttle mechanism 16 and refrigerant heater 17 and pipeline thereof.During Defrost operation, circulation process is: compressor 1-hot gas bypass solenoid valve 18-check valve 8-air-side heat exchanger 10-return-air bypass solenoid valve 13-throttle mechanism 16-refrigerant heating tube 17-gas-liquid separator 14-compressor 1.Now, hot gas bypass solenoid valve 18 is opened, and heats magnetic valve 2 and closes; Return-air bypass solenoid valve 13 is opened, return-air magnetic valve 15 cuts out; Compressor 1 high-temperature exhaust air directly enters air-side heat exchanger 10 defrostings, the refrigerant liquid formed after defrosting, the return-air bypass solenoid valve 13 of flowing through, and through throttle mechanism 16 reducing pressure by regulating flows, refrigerant heater 17 starts, and makes liquid refrigerant be converted into gaseous state, and carries out heat compensation, finally enter gas-liquid separator 14 and get back to compressor 1, completing defrost cycle.
Claims (4)
1. an air source hot pump water heater hot gas bypass defrosting device, comprise mainly by compressor (1), heat magnetic valve (2), water-side heat (3), reservoir (4), device for drying and filtering (5), expansion valve (7), air-side heat exchanger (10), gas-liquid separator (14), the air source hot pump water heater that return-air magnetic valve (15) and dual pressure control switch (20) form, it is characterized in that: also be provided with mainly by hot gas bypass solenoid valve (18), check valve (8), return-air bypass solenoid valve (13), throttle mechanism (16), the hot gas bypass defrosting device that refrigerant heater (17) forms, wherein: hot gas bypass valve and check valve are arranged on the pipeline between described exhaust outlet of compressor and described air-side heat exchanger inlet, increase return-air bypass line and refrigerant heater between the inlet of the liquid outlet of described air-side heat exchanger and described gas-liquid separator, and connect return-air bypass solenoid valve (13) and throttle mechanism (16) on this return-air bypass line.
2. air source hot pump water heater hot gas bypass defrosting device according to claim 1, is characterized in that: at described air-side heat exchanger (10), be fin-tube heat exchanger and be provided with fin temperature sensor (9) on fin.
3. air source hot pump water heater hot gas bypass defrosting device according to claim 1, is characterized in that: at described water-side heat (3), be plate type heat exchanger or double pipe heat exchanger.
4. air source hot pump water heater hot gas bypass defrosting device according to claim 1, it is characterized in that: described throttle mechanism (16) is expansion valve or capillary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320200446XU CN203323465U (en) | 2013-04-19 | 2013-04-19 | Hot-air bypass defrosting device of air source heat pump water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320200446XU CN203323465U (en) | 2013-04-19 | 2013-04-19 | Hot-air bypass defrosting device of air source heat pump water heater |
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| CN203323465U true CN203323465U (en) | 2013-12-04 |
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| CN201320200446XU Expired - Fee Related CN203323465U (en) | 2013-04-19 | 2013-04-19 | Hot-air bypass defrosting device of air source heat pump water heater |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196262A (en) * | 2013-04-19 | 2013-07-10 | 洛阳中懋环保设备有限公司 | Hot gas bypass defrosting device for air source heat pump water heater |
| CN105402889A (en) * | 2015-11-12 | 2016-03-16 | 海宁金能热水器有限公司 | Ultrasonic heating high-stability air energy water heater |
| 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 |
| CN111811143A (en) * | 2020-08-20 | 2020-10-23 | 广东瑞星新能源科技有限公司 | Integrated heat pump water heater with low-temperature storage box |
| CN112212528A (en) * | 2020-10-16 | 2021-01-12 | 衡阳晟达信息技术有限公司 | Anti-freezing device and anti-freezing method for air energy water heater |
| CN114382589A (en) * | 2021-12-23 | 2022-04-22 | 李国忠 | Ultrahigh-pressure air-intake oxygen-enriched combustion two-stroke internal combustion engine |
-
2013
- 2013-04-19 CN CN201320200446XU patent/CN203323465U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196262A (en) * | 2013-04-19 | 2013-07-10 | 洛阳中懋环保设备有限公司 | Hot gas bypass defrosting device for air source heat pump water heater |
| CN105402889A (en) * | 2015-11-12 | 2016-03-16 | 海宁金能热水器有限公司 | Ultrasonic heating high-stability air energy water heater |
| 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 |
| CN111811143A (en) * | 2020-08-20 | 2020-10-23 | 广东瑞星新能源科技有限公司 | Integrated heat pump water heater with low-temperature storage box |
| CN112212528A (en) * | 2020-10-16 | 2021-01-12 | 衡阳晟达信息技术有限公司 | Anti-freezing device and anti-freezing method for air energy water heater |
| CN114382589A (en) * | 2021-12-23 | 2022-04-22 | 李国忠 | Ultrahigh-pressure air-intake oxygen-enriched combustion two-stroke internal combustion engine |
| CN114382589B (en) * | 2021-12-23 | 2023-03-07 | 李国忠 | Ultrahigh-pressure air-intake oxygen-enriched combustion two-stroke internal combustion engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131204 Termination date: 20160419 |
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| CF01 | Termination of patent right due to non-payment of annual fee |