CN103307800A - Heat pump system - Google Patents
Heat pump system Download PDFInfo
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- CN103307800A CN103307800A CN2012100561914A CN201210056191A CN103307800A CN 103307800 A CN103307800 A CN 103307800A CN 2012100561914 A CN2012100561914 A CN 2012100561914A CN 201210056191 A CN201210056191 A CN 201210056191A CN 103307800 A CN103307800 A CN 103307800A
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Abstract
The invention discloses a heat pump system, which comprises a compressor, a four-way valve, a liquid-vapor separator, an indoor heat exchanger, an outdoor heat exchanger, a first throttling mechanism and a first bypass valve for selectively bypassing the first throttling mechanism. According to the heat pump system provided by the embodiment of the invention, the flow rate of a refrigerant in the system can be increased by opening the first bypass valve, the evaporating temperature of the refrigerant entering the outdoor heat exchanger is raised, and frost on the surface of the outdoor heat exchanger is slowly thawed without performing a defrosting reverse cycle. Since the refrigerant reverse cycle is not required during defrosting, the indoor heat exchanger can be used as a condenser to produce heat all the time, the temperature fluctuation of the indoor heat exchanger is reduced, and the operation efficiency of the system is also obviously improved. The defrosting can be performed when a small amount of frost is accumulated by the outdoor heat exchanger, so that the frost on the surface of the outdoor heat exchanger is discontinuously removed, thereby keeping stable operation of the system.
Description
Technical field
The present invention relates to a kind of heat pump,
Background technology
The conventional heat pump system after operation a period of time, for example heat circular flow a period of time in the winter time after, can accumulation frost layer on the outdoor heat exchanger, influence the runnability of heat exchange efficiency and heat pump, make the performance degradation of heat pump.Being accumulated to a certain degree at the frost layer, the back heat pump need carry out defrost cycle.
In defrost cycle, whole heat pump need carry out complete contrary circulation, wherein outdoor heat exchanger as indoor heat exchanger and indoor heat exchanger as outdoor heat exchanger.Because the conventional heat pump system need carry out contrary circulation in whole heat pump when defrosting, therefore need special defrosting mode, cause defrosting time long, and when defrosting, indoor heat exchanger is as evaporimeter, and indoor environment temperature can obviously descend, and causes the reduction of comfort level.
Summary of the invention
One object of the present invention is to propose a kind of heat pump that contrary circulation just can defrost that need not to carry out in whole system.
According to heat pump of the present invention, comprising: compressor; Cross valve, gas-liquid separator, indoor heat exchanger, outdoor heat exchanger, first throttle mechanism, first by-passing valve, described cross valve comprises first to fourth valve port, first of described compressor and described cross valve links to each other with the 3rd valve port; Described gas-liquid separator is connected between first opening of described compressor and described cross valve; In described indoor heat exchanger and the described outdoor heat exchanger each all has first and second openings, and first opening of described indoor heat exchanger links to each other with second valve port of described cross valve and second opening of described outdoor heat exchanger links to each other with the 4th valve port of described cross valve; Described first throttle mechanisms in series is between first opening of second opening of described indoor heat exchanger and described outdoor heat exchanger, described first throttle mechanism comprises first and second openings, first opening of described first throttle mechanism links to each other with second opening of described indoor heat exchanger, and second opening of described first throttle mechanism links to each other with first opening of described outdoor heat exchanger; Described first by-passing valve is in parallel with described first throttle mechanism with the described first throttle of bypass mechanism optionally.
According to heat pump of the present invention, by opening first by-passing valve simply, the pressure reduction of the cold-producing medium in the heat pump is faded away, flow increases, so the hot gas of inlet chamber external heat exchanger increases fast; And the interior effect owing to gas-liquid separator of follow-up a period of time, the refrigerant flow that circulates in the system reduces gradually, and the delivery temperature of compressor progressively improves, and therefore, the defrost speed of outdoor heat exchanger can improve fast.And when defrosting, need not to carry out contrary circulation.Because not contrary circulation, indoor heat exchanger can be used as condenser always, and the temperature fluctuation of indoor heat exchanger reduces greatly, and running efficiency of system also obviously improves.Defrosting can move when outdoor heat exchanger accumulates the small part frost, removing the frost on outdoor heat exchanger surface by phased manner, thus the stable operation that keeps heat pump.
Preferably, described first by-passing valve is magnetic valve.Can pass through optionally bypass first throttle mechanism of switching solenoid valve easily thus, thereby defrost.
Preferably, described heat pump also comprises second throttle mechanism and in parallel with described second throttle mechanism with second by-passing valve of bypass second throttle mechanism optionally, described second throttle mechanism and described first throttle mechanisms in series are between first opening of second opening of described indoor heat exchanger and described outdoor heat exchanger, described second throttle mechanism has first and second openings, second opening of described first throttle mechanism links to each other with first opening of described second throttle mechanism, and second opening of described second throttle mechanism links to each other with first opening of described outdoor heat exchanger.
Preferably, in described first and second by-passing valves is that magnetic valve and another are check valve.。
Preferably, described first and second by-passing valves are magnetic valve.。
Preferably, described first and second throttle structures are heating power expansion valve.
Preferably, described indoor heat exchanger and described outdoor heat exchanger are micro-channel heat exchanger.
Description of drawings
Fig. 1 is the schematic diagram according to the heat pump that is in heating mode of first embodiment of the invention;
Fig. 2 is the schematic diagram according to the heat pump that is in defrosting mode of first embodiment of the invention;
Fig. 3 is the schematic diagram according to the heat pump that is in refrigeration mode of first embodiment of the invention;
Fig. 4 is the schematic diagram according to the heat pump that is in heating mode of second embodiment of the invention;
Fig. 5 is the schematic diagram according to the heat pump that is in defrosting mode of second embodiment of the invention;
Fig. 6 is the schematic diagram according to the heat pump that is in refrigeration mode of second embodiment of the invention;
Fig. 7 is the schematic diagram according to the heat pump that is in heating mode of third embodiment of the invention;
Fig. 8 is the schematic diagram according to the heat pump that is in defrosting mode of third embodiment of the invention; With
Fig. 9 is the schematic diagram according to the heat pump that is in refrigeration mode of third embodiment of the invention.
The specific embodiment
Below with reference to the heat pump of Fig. 1-3 description according to first embodiment of the invention.
As Figure 1-3, the heat pump according to the embodiment of the invention comprises compressor 1, gas-liquid separator 10, cross valve 2, indoor heat exchanger 3, outdoor heat exchanger 4, first throttle mechanism 5 and first by-passing valve 7.
Particularly, cross valve 2 has first to fourth valve port a, b, and c and d, the outlet of compressor 1 links to each other with the first valve port a with the 3rd valve port c of cross valve 2 respectively with entrance, and gas-liquid separator 10 is connected between the entrance and the first valve port a of compressor 1.In indoor heat exchanger 3 and the outdoor heat exchanger 4 each all has first and second openings, and first opening of indoor heat exchanger 3 links to each other with the second valve port b of cross valve 2 and second opening 42 of outdoor heat exchanger 4 links to each other with the 4th valve port d of cross valve 2.
First by-passing valve 7 and first throttle mechanism 5 are in parallel with bypass first throttle mechanism 5 optionally.In other words, first by-passing valve 7 can conducting or is ended, and when first by-passing valve 7 was opened, cold-producing medium was by first by-passing valve 7, thereby the bypass first throttle mechanism 5 in parallel with first by-passing valve 7 changed the flow of the cold-producing medium of inlet chamber external heat exchanger 4 thus.Here, it will be appreciated that " optionally " refers to according to the required operational mode conducting of heat pump or by first by-passing valve, 7 bypass first throttle mechanisms 5.
It all is known that other of heat pump constitute for those skilled in the art, is not described in detail here, for example is provided with the motor 12 of blower fan 11 and driving blower fan 11 at indoor heat exchanger 3 places.
More specifically, when opening first by-passing valve 7, refrigerant bypass is crossed the first throttle mechanism 5 in parallel with it, thus cold-producing medium without first throttle mechanism 5, the refrigerant flow of inlet chamber external heat exchanger 4 thus, thus can defrost to outdoor heat exchanger 4.
Heat pump according to the embodiment of the invention, when needs defrost to outdoor heat exchanger 4, by opening first by-passing valve 7 simply, the pressure reduction of the cold-producing medium in the heat pump is faded away, flow increases, so the hot gas of inlet chamber external heat exchanger 4 increases fast; And the interior effect owing to gas-liquid separator 10 of follow-up a period of time, the refrigerant flow that circulates in the system reduces gradually, and the delivery temperature of compressor 1 progressively improves, and therefore, the defrost speed of outdoor heat exchanger 4 can improve fast.And when defrosting, need not to carry out contrary circulation.Owing to there is not defrost cycle, indoor heat exchanger 3 can be used as condenser always, and the temperature fluctuation of indoor heat exchanger 3 reduces greatly, and running efficiency of system also obviously improves.Defrosting can move when outdoor heat exchanger accumulates the small part frost, removing the frost on outdoor heat exchanger surface by phased manner, thus the stable operation that keeps heat pump.
In other words, open first by-passing valve, the 7 bypass first throttle mechanism 5 of parallel connection with it, thereby the flow of the cold-producing medium of inlet chamber external heat exchanger 4 increases, temperature improves, thus outdoor heat exchanger 4 is defrosted, when heating and freeze, close first by-passing valve 7, therefore the switching that heats, defrosts and freeze is very convenient.When defrosting cold-producing medium need not contrary circulation in whole system, the same in the circulation under the heating mode with heat pump, so indoor machine evaporation 3 is still as condenser, the fluctuation of indoor machine evaporation 3 is little, fluctuations in indoor temperature is little, temperature is more comfortable.In this embodiment of the present invention, but first throttle mechanism 5 is the throttle mechanism of two-way admittance.
Preferably, first throttle mechanism 5 is the heating power expansion valve of two-way admittance, and first by-passing valve 7 is magnetic valve.Indoor heat exchanger 3 and outdoor heat exchanger 4 are micro-channel heat exchanger, and defrosting effect is better thus.
Below the simple operation of describing according to the heat pump of first embodiment of the invention.
As shown in Figure 1, under the heating mode, first by-passing valve 7 ends, the circulation of cold-producing medium is to pass through cross valve 2, indoor heat exchanger 3, first throttle mechanism 5 successively from compressor, first opening 41 of outdoor heat exchanger 4, second opening 42 of outdoor heat exchanger 4, cross valve 2 and gas-liquid separator 10 finally return compressor 1.
When needs defrost, open first by-passing valve 7, the circulation of cold-producing medium is successively by cross valve 2 from compressor, indoor heat exchanger 3, the first by-passing valves 7, first opening 41 of outdoor heat exchanger 4, second opening 42 of outdoor heat exchanger 4, cross valve 2 and gas-liquid separator 10 finally return compressor 1.As mentioned above, because cold-producing medium is not by first throttle mechanism 5, thereby the flow of the cold-producing medium of inlet chamber external heat exchanger 4 increases, temperature improves, thus outdoor heat exchanger 4 is defrosted, and cold-producing medium need not contrary circulation in system, has improved defrosting effect, has reduced the fluctuation of indoor heat exchanger 3.
Under refrigeration mode, first by-passing valve 7 ends, the circulation of cold-producing medium is successively by cross valve 2 from compressor, second opening 42 of outdoor heat exchanger 4, first opening 41 of outdoor heat exchanger 4, first throttle mechanism 5, indoor heat exchanger 3, cross valve 2 and gas-liquid separator 10 finally return compressor 1.
Below with reference to the heat pump of Fig. 4-6 description according to second embodiment of the invention.
In the heat pump of second embodiment of the invention, comprise that also second throttle mechanism 6 and second by-passing valve 8, the second by-passing valves 8 in parallel with second throttle mechanism 6 are used for optionally bypass second throttle mechanism 6.In the embodiment shown in Fig. 4-6, second by-passing valve 8 is check valve, and first by-passing valve 7 is magnetic valve.First throttle mechanism 5 and second throttle mechanism 6 be the heating power expansion valve of unidirectional conducting all.Constituting according to other of the heat pump of second embodiment of the invention can be identical with first embodiment.
More specifically, first throttle mechanism 5 and second throttle mechanism 6 are connected between first opening 41 of second opening of indoor heat exchanger 3 and outdoor heat exchanger 4, second throttle mechanism 6 has first and second openings, first opening of first throttle mechanism 5 links to each other with second opening of indoor heat exchanger 3, second opening of first throttle mechanism 5 links to each other with first opening of second throttle mechanism 6, and second opening of second throttle mechanism 6 links to each other with first opening 41 of outdoor heat exchanger 4.
Second by-passing valve 8 is in parallel with second throttle mechanism 6 with bypass second throttle mechanism 6 optionally.In other words, second by-passing valve 8 can conducting or is ended, and when second by-passing valve 8 was opened, cold-producing medium was by second by-passing valve 8, thus bypass second throttle mechanism 6 in parallel with second by-passing valve 8.
Heat pump according to second embodiment of the invention, by first throttle mechanism 5 and second throttle mechanism 6 are set, and first by-passing valve 7 in parallel with first throttle mechanism 5 and second by-passing valve 8 in parallel with second throttle mechanism 6, when defrosting, first by-passing valve 7 and the 8 equal conductings of second by-passing valve, the refrigerant flow of inlet chamber external heat exchanger 4 and temperature improve, thereby defrost.
When heating, cold-producing medium passes through second throttle mechanism 6 and bypass first throttle mechanism 5.When refrigeration, first by-passing valve 7 ends, 8 conductings of second by-passing valve, and cold-producing medium passes through first throttle mechanism 5 and bypass second throttle mechanism 6.
In the embodiment shown in Fig. 4-6, first by-passing valve 7 is check valve, and first by-passing valve 7 conducting under heating mode and defrosting mode, ends under refrigeration mode.
Referring to the simple operation of describing according to the heat pump of second embodiment of the invention of Fig. 4-6.
Under heating mode, 7 conductings of first by-passing valve, second by-passing valve 8 ends, and cold-producing medium passes through cross valve 2 successively from compressor 1, indoor heat exchanger 3, first by-passing valve 7, second throttle mechanism 6, first opening 41 of outdoor heat exchanger 4, second opening 42 of outdoor heat exchanger 4, cross valve 2 and gas-liquid separator 10 finally return compressor 1.
Under defrosting mode, first by-passing valve 7 and the 8 equal conductings of second by-passing valve, cold-producing medium passes through cross valve 2 successively from compressor 1, indoor heat exchanger 3, the first by-passing valves 7, the second by-passing valves 8, first opening 41 of outdoor heat exchanger 4, second opening 42 of outdoor heat exchanger 4, cross valve 2 and gas-liquid separator 10 finally return compressor 1.Because cold-producing medium does not pass through first throttle mechanism 5 and second throttle mechanism 6, so that the pressure reduction in the air-conditioning system fades away, refrigerant flow increases, so the hot gas of inlet chamber external heat exchanger increases fast; And follow-up a period of time is interior because the effect of gas-liquid separator, the refrigerant flow that circulates in the system reduces gradually, and the delivery temperature of compressor progressively improves, therefore, the defrost speed of off-premises station can improve fast, and does not need cold-producing medium contrary circulation in whole system.
Under refrigeration mode, first by-passing valve 7 ends, 8 conductings of second by-passing valve, cold-producing medium passes through cross valve 2 successively from compressor 1, second opening 42 of outdoor heat exchanger 4, first opening 41 of outdoor heat exchanger 4, second by-passing valve 8, first throttle mechanism 5, indoor heat exchanger 3, cross valve 2 and gas-liquid separator 10 finally return compressor 1.
Below with reference to the heat pump of Fig. 7-9 description according to third embodiment of the invention.Be that according to the heat pump of third embodiment of the invention and difference according to the heat pump of second embodiment of the invention second by-passing valve 8 is check valve, first by-passing valve 7 is magnetic valve.Identical with heat pump according to second embodiment of the invention according to the operation of the heat pump of third embodiment of the invention, repeat no more here.
In some embodiments of the invention, first by-passing valve 7 and second by-passing valve 8 can be magnetic valve, and first throttle mechanism 5 and second throttle mechanism 6 also can be the heating power expansion valve of two-way admittance.
According to embodiments of the invention, by by-passing valve in parallel with throttle mechanism with bypass throttle mechanism optionally, can increase the refrigerant flow that enters in the off-premises station evaporimeter as required, and under the effect of gas-liquid separator, improve the refrigerant temperature that enters in the off-premises station evaporimeter, thereby do not need to make cold-producing medium contrary circulation in whole system, just can defrost.
In the present invention, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.Term " a plurality of " refers to two or more, unless clear and definite restriction is arranged in addition.
In the present invention, unless clear and definite regulation and restriction are arranged in addition, broad understanding should be done in terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand above-mentioned term concrete implication in the present invention as the case may be.
Although illustrated and described embodiments of the invention, those of ordinary skill in the art can carry out multiple variation, modification, replacement and modification to these embodiment under the situation that does not break away from principle of the present invention and aim.
Claims (7)
1. a heat pump is characterized in that, comprising: compressor; Cross valve, gas-liquid separator, indoor heat exchanger, outdoor heat exchanger, first throttle mechanism, first by-passing valve, described cross valve has first to fourth valve port, and first of described compressor and described cross valve links to each other with the 3rd valve port; Described gas-liquid separator is connected between first opening of described compressor and described cross valve; In described indoor heat exchanger and the described outdoor heat exchanger each all has first and second openings, and first opening of described indoor heat exchanger links to each other with second valve port of described cross valve and second opening of described outdoor heat exchanger links to each other with the 4th valve port of described cross valve; Described first throttle mechanisms in series is between first opening of second opening of described indoor heat exchanger and described outdoor heat exchanger, described first throttle mechanism has first and second openings, first opening of described first throttle mechanism links to each other with second opening of described indoor heat exchanger, and second opening of described first throttle mechanism links to each other with first opening of described outdoor heat exchanger; Described first by-passing valve is in parallel with described first throttle mechanism with the described first throttle of bypass mechanism optionally.
2. heat pump according to claim 1 is characterized in that, described first by-passing valve is magnetic valve.
3. heat pump according to claim 1, it is characterized in that, also comprise second throttle mechanism and in parallel with described second throttle mechanism with second by-passing valve of bypass second throttle mechanism optionally, described second throttle mechanism and described first throttle mechanisms in series are between first opening of second opening of described indoor heat exchanger and described outdoor heat exchanger, described second throttle mechanism has first and second openings, second opening of described first throttle mechanism links to each other with first opening of described second throttle mechanism, and second opening of described second throttle mechanism links to each other with first opening of described outdoor heat exchanger.
4. heat pump according to claim 3 is characterized in that, in described first and second by-passing valves one is that magnetic valve and another are check valve.
5. heat pump according to claim 3 is characterized in that, described first and second by-passing valves are magnetic valve.
6. heat pump according to claim 1 is characterized in that, described first and second throttle structures are heating power expansion valve.
7. according to each described heat pump among the claim 1-6, it is characterized in that described indoor heat exchanger and described outdoor heat exchanger are micro-channel heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210056191.4A CN103307800B (en) | 2012-03-06 | 2012-03-06 | Heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210056191.4A CN103307800B (en) | 2012-03-06 | 2012-03-06 | Heat pump |
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| CN103307800A true CN103307800A (en) | 2013-09-18 |
| CN103307800B CN103307800B (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210056191.4A Active CN103307800B (en) | 2012-03-06 | 2012-03-06 | Heat pump |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712363A (en) * | 2014-01-13 | 2014-04-09 | 克莱门特捷联制冷设备(上海)有限公司 | Multipurpose defrosting control method for reverse circulating heat pump and corresponding heat pump device |
| CN104949409A (en) * | 2015-07-13 | 2015-09-30 | 金鑫 | System and method for flexibly defrosting air-source heat pump without starting compressor |
| CN105509384A (en) * | 2015-12-17 | 2016-04-20 | 珠海格力电器股份有限公司 | Defrosting method of air conditioner multi-split system and air conditioner multi-split system |
| CN106016628A (en) * | 2016-06-30 | 2016-10-12 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner |
| CN106352629A (en) * | 2016-08-22 | 2017-01-25 | 珠海格力电器股份有限公司 | Air conditioner and bypass heating defrosting control method thereof |
| CN110736203A (en) * | 2019-09-25 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110736213A (en) * | 2019-09-27 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN111386432A (en) * | 2018-10-31 | 2020-07-07 | 友隆电器工业(深圳)有限公司 | Frost-free operation method of dehumidifier and dehumidifier |
| WO2020211407A1 (en) * | 2019-04-18 | 2020-10-22 | 广东芬尼克兹节能设备有限公司 | Heat pump system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712363B (en) * | 2014-01-13 | 2016-03-02 | 克莱门特捷联制冷设备(上海)有限公司 | The multipurpose defrosting control method of inverse circulating heat pump |
| CN103712363A (en) * | 2014-01-13 | 2014-04-09 | 克莱门特捷联制冷设备(上海)有限公司 | Multipurpose defrosting control method for reverse circulating heat pump and corresponding heat pump device |
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| CN105509384B (en) * | 2015-12-17 | 2017-12-29 | 珠海格力电器股份有限公司 | Defrosting method of air conditioner multi-split system and air conditioner multi-split system |
| CN106016628A (en) * | 2016-06-30 | 2016-10-12 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner |
| CN106016628B (en) * | 2016-06-30 | 2019-01-29 | 珠海格力电器股份有限公司 | Defrosting control method and device for air conditioner |
| CN106352629A (en) * | 2016-08-22 | 2017-01-25 | 珠海格力电器股份有限公司 | Air conditioner and bypass heating defrosting control method thereof |
| CN111386432A (en) * | 2018-10-31 | 2020-07-07 | 友隆电器工业(深圳)有限公司 | Frost-free operation method of dehumidifier and dehumidifier |
| WO2020211407A1 (en) * | 2019-04-18 | 2020-10-22 | 广东芬尼克兹节能设备有限公司 | Heat pump system |
| CN110736203A (en) * | 2019-09-25 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110736203B (en) * | 2019-09-25 | 2021-11-23 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110736213A (en) * | 2019-09-27 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110736213B (en) * | 2019-09-27 | 2021-11-23 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
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| CN103307800B (en) | 2016-05-25 |
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