CN201034400Y - Defrosting device of air source heat pump water heater - Google Patents
Defrosting device of air source heat pump water heater Download PDFInfo
- Publication number
- CN201034400Y CN201034400Y CNU2007201483391U CN200720148339U CN201034400Y CN 201034400 Y CN201034400 Y CN 201034400Y CN U2007201483391 U CNU2007201483391 U CN U2007201483391U CN 200720148339 U CN200720148339 U CN 200720148339U CN 201034400 Y CN201034400 Y CN 201034400Y
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- defrosting
- valve
- pipeline
- return air
- heat exchanger
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Abstract
The utility model discloses a defrosting device of an air source heat pump water heater, comprising a return air cut-off valve, a hot gas bypass valve, a defrosting heat exchanger, capillary tubes, a defrosting throttle valve and a return air temperature sensor. The return air cut-off valve is arranged on the return air pipe of the evaporator, the first inlet of the defrosting heat exchanger on which the hot gas bypass valve is arranged is connected to an exhaust pipeline of a compressor, and a first outlet is connected to the pipeline between the return air cut-off valve and the evaporator. A second inlet on which the defrosting throttle valve and the capillary tubes are arranged is connected to a pipeline between a liquid separation head and an expansion valve, the second outlet is connected to an air inlet pipeline of a vapor liquid separator, and the return air temperature sensor is arranged on the pipeline between the vapor liquid separator and the compressor. The device can realize stable and continuous defrosting in the condition with external heat source, and realizes energy conversion by the defrosting heat exchanger, thus to make refrigerants evaporate without consuming the energy of hot water, improves the efficiency of the unit, and makes the compressor operate in the dry condition without the hot water temperature being affected.
Description
Technical field
The utility model relates to a kind of defroster of air source hot pump water heater.
Background technology
When the air-source heat pump hot water group is moved under the lower situation of outdoor operating mode, when the evaporator surface temperature is lower than 0 ℃, air humidity begins frosting when big, along with thickening of frost layer, evaporating temperature to occur descends, heating capacity descends, fan performance is decayed and press returns phenomenons such as liquid, has a strong impact on system's operation, therefore takes the variety of way defrosting just to become important research project.
Air source hot pump water heater defrosting mode has following several at present: hot gas bypass valve defrosting, four-way change-over valve defrosting and electrical heating defrosting.1) as shown in Figure 1, hot gas bypass valve defrosting be by hot gas bypass valve 9 ' with the HTHP exhaust by compressor 1 ' exhaust outlet guide into evaporimeter 5 ', defrost by the heat release of HTHP cooling medium liquefaction, because the heat of high-pressure side refrigerant still comes from the heat that absorbs in the evaporimeter, when temperature lower, when defrosting is fast inadequately, will not have enough heat absorption, and make main frame enter the protectiveness stopped status; 2) as shown in Figure 2, the four-way change-over valve defrosting is by cross valve 14 commutations, with evaporimeter and condenser role exchange, the realization defrosting, defrost system is fairly simple, reaches the defrosting purpose with the heat that consumes hot water in the heat exchanger, inhale during defrosting, the pressure at expulsion conversion is violent, compressor is impacted greatly, and supply water temperature fluctuation big (absorb heat from hot water, be used for defrosting) heating efficiency is low; 3) the electrical heating defrosting realizes heating defrosting by arrange electric heater in evaporimeter, and this Defrost mode is simple, but must could defrost under the system-down condition; defrosting time is long, and consumed power is big, and efficient is low; and the electric heating tube difficult arrangement is unfavorable for using.
The utility model content
At the deficiency that above-mentioned prior art exists, the purpose of this utility model is to provide a kind of defroster of air source hot pump water heater.This device is under the condition that does not need external thermal source, can realize the defrosting of steady and continuous, carrying out energy by the defrosting heat exchanger transforms, the heat that makes the low-temp low-pressure refrigerant need not consume hot water just can evaporate, improved the efficient of unit, compressor is moved under dry cooling condition, and the hot water temperature is unaffected.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of defroster of air source hot pump water heater, comprise the back-steam shut-off valve, hot gas bypass valve, the defrosting heat exchanger, capillary, defrosting choke valve and back-steam temperature sensor, described back-steam shut-off valve is arranged on the back-steam pipeline of evaporimeter, first inlet of defrosting heat exchanger is coupled to the gas exhaust piping of compressor, hot gas bypass valve is set on it, first outlet is coupled to the pipeline between back-steam shut-off valve and the evaporimeter, second inlet is coupled to the pipeline between liquid-dividing head and the expansion valve, set gradually defrosting choke valve and capillary on it, second outlet is coupled to the admission passage of vapour liquid separator, and the back-steam temperature sensor is arranged on the pipeline between vapour liquid separator and the compressor.
The utility model is by the hot-gas bypass inverse defrosting, realize the cooling of HTHP refrigerant and the evaporation of low-temp low-pressure refrigerant by the defrosting heat exchanger, system stability in the defrost process, under the condition that does not need external thermal source, can realize the defrosting of steady and continuous, improve the efficient that the machine unit in winter prepares hot water greatly, had a following outstanding beneficial effect:
1) under the condition that does not need external thermal source, can realize the defrosting of steady and continuous, the defrosting efficiency height;
2) the cold and hot balance in the time of can realizing defrosting by the defrosting heat exchanger;
3) the high-pressure liquid refrigerant after the defrosting through the throttling of defrosting throttle mechanism, guarantees to reach the evaporating state point when entering the defrosting heat exchanger, guarantees refrigerant evaporation fully in the defrosting heat exchanger, and compressor can be to move under the operating mode, and the hot water temperature is unaffected.
Description of drawings
Fig. 1 is the schematic diagram of existing bypass defrost system;
Fig. 2 is the schematic diagram of existing four-way change-over valve defrost system;
Fig. 3 is a systematic schematic diagram of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of reference numerals is as follows:
1,1 '---compressor 2---heat exchanger
3---expansion valve 4---liquid-dividing head
5,5 '---evaporimeter 6---fans
7---back-steam shut-off valve 8---vapour liquid separator
9,9 '---hot gas bypass valve 10---defrosting heat exchangers
11---capillaries 12---defrosting choke valve
13---back-steam temperature sensor 14---cross valve
As shown in Figure 3, the defroster of this air source hot pump water heater is mainly by back-steam shut-off valve 7, hot gas bypass valve 9, defrosting heat exchanger 10, capillary 11, defrosting choke valve 12 and back-steam temperature sensor 13 are formed, compressor 1, heat exchanger 2, expansion valve 3, liquid-dividing head 4, evaporimeter 5, vapour liquid separator 8 connects formation refrigerant cyclic part successively, one side of evaporimeter 5 is provided with fan 6, back-steam shut-off valve 7 is arranged on the back-steam pipeline of evaporimeter 5, first inlet of defrosting heat exchanger 10 is coupled to the gas exhaust piping of compressor 1, hot gas bypass valve 9 is set on it, first outlet is coupled to the pipeline between back-steam shut-off valve 7 and the evaporimeter 5, second inlet is coupled to the pipeline between liquid-dividing head 4 and the expansion valve 3, set gradually defrosting choke valve 12 and capillary 11 on it, second outlet is coupled to the admission passage of vapour liquid separator 8, and back-steam temperature sensor 13 is arranged on the pipeline between vapour liquid separator 8 and the compressor 1.
This defrost system is judged whether frosting of refrigeration system by the refrigeration system back-steam temperature that detects back-steam temperature sensor 13 (T1) and measure, and after the frosting of the system of discovery, defrost system is devoted oneself to work.Hot gas bypass valve 9, defrosting choke valve 12 are opened during defrosting, back-steam closes section valve 7 closes, after the exhaust of compressor enters 10 coolings of defrosting heat exchanger through hot gas bypass valve 9, enter evaporator defrost, refrigerant after the defrosting becomes the high-pressure liquid refrigerant, after isocon 4 collections, become low pressure vapour-liquid two-phase medium through the refrigerant after defrosting choke valve 12 and capillary 11 throttlings and enter defrosting heat exchanger 10 and compressor HTHP exhaust gas heat exchanging, gaseous coolant after the evaporation is sucked back compression by compressor 1, and constantly circulation realizes defrosting.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present invention; though but on its shape or structure, do any variation, every identical with the utility model or akin technical scheme is all within its protection domain.
Claims (1)
1. the defroster of an air source hot pump water heater, it is characterized in that, comprise the back-steam shut-off valve, hot gas bypass valve, the defrosting heat exchanger, capillary, defrosting choke valve and back-steam temperature sensor, described back-steam shut-off valve is arranged on the back-steam pipeline of evaporimeter, first inlet of defrosting heat exchanger is coupled to the gas exhaust piping of compressor, hot gas bypass valve is set on it, first outlet is coupled to the pipeline between back-steam shut-off valve and the evaporimeter, second inlet is coupled to the pipeline between liquid-dividing head and the expansion valve, set gradually defrosting choke valve and capillary on it, second outlet is coupled to the admission passage of vapour liquid separator, and the back-steam temperature sensor is arranged on the pipeline between vapour liquid separator and the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201483391U CN201034400Y (en) | 2007-05-31 | 2007-05-31 | Defrosting device of air source heat pump water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201483391U CN201034400Y (en) | 2007-05-31 | 2007-05-31 | Defrosting device of air source heat pump water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034400Y true CN201034400Y (en) | 2008-03-12 |
Family
ID=39195289
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201483391U Expired - Fee Related CN201034400Y (en) | 2007-05-31 | 2007-05-31 | Defrosting device of air source heat pump water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034400Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388279A (en) * | 2009-04-09 | 2012-03-21 | 开利公司 | Refrigerant vapor compression system with hot gas bypass |
| CN105135728A (en) * | 2015-10-10 | 2015-12-09 | 天津商业大学 | Low-temperature air-cooled heat pump system |
| CN104329800B (en) * | 2013-07-22 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and system of water heater and heat pump water heater |
| CN109186148A (en) * | 2018-06-27 | 2019-01-11 | 芜湖盘云石磨新能源科技有限公司 | A kind of air source heat pump defrosting device with graphene Electric radiant Heating Film |
| CN111536719A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting defrosted refrigerant to directly spray liquid for evaporation |
| CN111536720A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting secondary condensation of refrigerant |
-
2007
- 2007-05-31 CN CNU2007201483391U patent/CN201034400Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102388279A (en) * | 2009-04-09 | 2012-03-21 | 开利公司 | Refrigerant vapor compression system with hot gas bypass |
| CN102388279B (en) * | 2009-04-09 | 2014-09-24 | 开利公司 | Refrigerant vapor compression system with hot gas bypass |
| CN104329800B (en) * | 2013-07-22 | 2017-02-01 | 广东美的暖通设备有限公司 | Defrosting control method and system of water heater and heat pump water heater |
| CN105135728A (en) * | 2015-10-10 | 2015-12-09 | 天津商业大学 | Low-temperature air-cooled heat pump system |
| CN109186148A (en) * | 2018-06-27 | 2019-01-11 | 芜湖盘云石磨新能源科技有限公司 | A kind of air source heat pump defrosting device with graphene Electric radiant Heating Film |
| CN111536719A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting defrosted refrigerant to directly spray liquid for evaporation |
| CN111536720A (en) * | 2020-05-26 | 2020-08-14 | 广东省现代农业装备研究所 | Defrosting method and device adopting secondary condensation of refrigerant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 |