CN202692530U - Heat-pump air-conditioning system - Google Patents

Heat-pump air-conditioning system Download PDF

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Publication number
CN202692530U
CN202692530U CN 201220372660 CN201220372660U CN202692530U CN 202692530 U CN202692530 U CN 202692530U CN 201220372660 CN201220372660 CN 201220372660 CN 201220372660 U CN201220372660 U CN 201220372660U CN 202692530 U CN202692530 U CN 202692530U
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China
Prior art keywords
compressor
heat
heat exchanger
refrigerant
type air
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Withdrawn - After Issue
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CN 201220372660
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Chinese (zh)
Inventor
孟琪林
段亮
陈绍林
熊军
梁志滔
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN 201220372660 priority Critical patent/CN202692530U/en
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Abstract

The utility model provides a heat-pump air-conditioning system, which comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor, a four-way valve, a heat accumulator and a heat accumulation loop, wherein the four-way valve is respectively communicated with the air suction end and the air exhaust end of the compressor, the indoor heat exchanger and the outdoor heat exchanger; the four-way valve is connected with the air suction end of the compressor through a first pipeline; the heat accumulator is wrapped on the outer wall of the compressor; and the heat accumulator is connected to the heat accumulation loop in series, and the heat accumulation loop is connected with the first pipeline in parallel. The heat-pump air-conditioning system makes full use of heat in the outdoor heat exchanger and greatly increases the air suction superheat degree and the enthalpy value of the refrigerant at the air suction end of the compressor, thereby greatly improving the temperature of the refrigerant at the air exhaust end of the compressor and improving the defrosting efficiency of the heat-pump air-conditioning system.

Description

Heat pump type air corditioning system
Technical field
The utility model relates to air conditioner technical field, more particularly, relates to a kind of heat pump type air corditioning system.
Background technology
Heat in the process at heat pump type air corditioning system, when ambient temperature is low, easily frosting on the outdoor heat exchanger, so that the heat transfer effect of outdoor heat exchanger reduces, thereby affect the carrying out that heat pump type air corditioning system heats process, when frosting acquires a certain degree, so that the indoor heating effect is lower, even indoor heat exchanger can't be heated, namely can't blow out the wind that heats that is higher than indoor temperature.At this time just need to remove the frosting on the outdoor heat exchanger, to recover its heat transfer effect, guarantee the heating performance of heat pump type air corditioning system.The patent No. be CN201180001679.0 patent disclosure a kind of refrigerating circulatory device, Defrost mode is mainly at compressor housing storage heater and accumulation of heat loop is set in this refrigerating circulatory device, wherein storage heater gathers heat that compressor operating produces and absorbs this heat for refrigerant, accumulation of heat loop one end is connected with pipeline between indoor heat exchanger and the expansion valve, and the other end in accumulation of heat loop is connected with the suction end of compressor.The refrigerant that indoor heat exchanger is flowed into expansion valve partly imports in the storage heater, flow through storage heater and absorb the heat that compressor operating that storage heater assembles produces of refrigerant, then flow into compressor, improve suction superheat and the enthalpy of compressor air suction end refrigerant with this, thereby improve the temperature of compressor air-discharging end refrigerant, and then improve the temperature of whole system refrigerant, and namely improve the temperature of refrigerant in the outdoor heat exchanger, realize the defrosting to outdoor heat exchanger.
In the above-mentioned Defrost mode, owing to the refrigerant that flows into expansion valve from indoor heat exchanger is the gas-liquid mixed refrigerant, the refrigerant temperature of this state is lower, and enthalpy is lower.This refrigerant endothermic gasification in storage heater becomes gaseous coolant, be that the interior heat part of storage heater is used for this refrigerant gasification, a part is used for suction superheat and the enthalpy of this refrigerant of rising, after then causing this refrigerant through the storage heater heating, it is less that the suction superheat of this refrigerant and enthalpy raise, owing to flow into the refrigerant of compressor air suction end and mutually mix from the refrigerant that outdoor heat exchanger flows into the compressor air suction end from storage heater, so that the suction superheat of compressor air suction end refrigerant and enthalpy rising is less, cause the required defrosting time of above-mentioned Defrost mode longer, so that defrosting efficiency is lower.
In addition, in the above-mentioned Defrost mode, the refrigerant that indoor heat exchanger is flowed into expansion valve partly imports in the storage heater, because storage heater is arranged on the compressor, compressor is all far away apart from the distance of indoor heat exchanger apart from distance and the compressor of expansion valve, it is longer that the refrigerant that causes indoor heat exchanger to flow into expansion valve partly imports the required pipeline of storage heater, so that whole air-conditioning system pipeline is complicated, also is simultaneously that the cost of air-conditioning system is higher.
In sum, how improving the defrosting efficiency of heat pump type air corditioning system, is present those skilled in the art's problem demanding prompt solution.
The utility model content
The purpose of this utility model provides a kind of heat pump type air corditioning system, to improve the defrosting efficiency of heat pump type air corditioning system.
To achieve these goals, the utility model provides following technical scheme:
A kind of heat pump type air corditioning system, comprise: indoor heat exchanger, outdoor heat exchanger, compressor, with the cross valve that suction end and exhaust end, described indoor heat exchanger and the described outdoor heat exchanger of described compressor are connected, described cross valve links to each other with the suction end of described compressor by the first pipeline; Be wrapped in the storage heater on the described compressor outer wall; Be in series with the accumulation of heat loop of described storage heater, described accumulation of heat loop is in parallel with described the first pipeline.
Preferably, in the above-mentioned heat pump type air corditioning system, described the first pipeline and described accumulation of heat loop are connected with the suction end of described compressor by gas-liquid separator.
Preferably, in the above-mentioned heat pump type air corditioning system, described accumulation of heat is in series with the first two-port valve on the loop; Be in series with the second two-port valve on described the first pipeline.
Preferably, in the above-mentioned heat pump type air corditioning system, described the first pipeline and described accumulation of heat loop are connected with described cross valve by triple valve.
Preferably, above-mentioned heat pump type air corditioning system also comprises being in series with described storage heater, and to the heating circuit of described storage heater heating, the two ends of described heating circuit are communicated with respectively the exhaust end of described the first pipeline and described compressor.
Preferably, above-mentioned heat pump type air corditioning system, comprise that also an end is communicated with the hot gas bypass circuit of described outdoor heat exchanger, the other end of described hot gas bypass circuit is connected with the exhaust end that is communicated with described compressor and the second pipeline of described cross valve, perhaps is connected with the 3rd pipeline that is communicated with described indoor heat exchanger and described cross valve; Be in series with the 3rd two-port valve on the described hot gas bypass circuit.
Preferably, in the above-mentioned heat pump type air corditioning system, the compressor of heat pump type air corditioning system is double-stage compressor or compound compressor.
Preferably, above-mentioned heat pump type air corditioning system also comprises the tonifying Qi loop for tonifying Qi in described compressor, and described tonifying Qi loop is connected with the flash vessel of heat-pump-type defrost system, and is in series with aeration valve on the described tonifying Qi loop.
Heating and defrosting process and the principle of the heat pump type air corditioning system that the utility model provides are as follows:
Open the accumulation of heat loop, the refrigerant that is about to flow into from cross valve the suction end of compressor partly imports the accumulation of heat loop, this part refrigerant flows in the storage heater, storage heater has gathered the heat of compressor outer wall, because employing partly enters the accumulation of heat loop from the refrigerant that cross valve flows into the suction end of compressor, namely this refrigerant has passed through outdoor heat exchanger, in outdoor heat exchanger, absorbed heat, become low-pressure low-temperature gas, partly import the low-temp low-pressure gaseous coolant in the storage heater, so that the heat in the storage heater all is used for temperature and the enthalpy of this low-temp low-pressure gaseous coolant of rising, it is larger that thereby the temperature of this refrigerant and enthalpy raise, then this refrigerant flows into the suction end of compressor, converge with the low-temp low-pressure gaseous coolant of not heat absorption and enter compressor, sensible heat very, suction superheat and the enthalpy of compressor air suction end refrigerant have been improved significantly, thereby Effective Raise the temperature of compressor air-discharging end refrigerant, and then Effective Raise the temperature of whole system refrigerant, namely improve significantly the temperature of refrigerant in the outdoor heat exchanger, and then improved the defrosting efficiency of outdoor heat exchanger.
By above-mentioned defrost process and principle as can be known, the heat pump type air corditioning system that the utility model provides, by setting up the accumulation of heat loop in parallel with the first pipeline, and be series on the accumulation of heat loop, and be wrapped in storage heater on the compressor outer wall, wherein the first pipeline is the pipeline of the suction end that is communicated with cross valve and compressor.Because the accumulation of heat loop is in parallel with the first pipeline, be the low-temp low-pressure gaseous coolant through the outdoor heat exchanger heat absorption so that flow into the refrigerant of storage heater, the low-temp low-pressure gaseous coolant that soon should flow into the compressor air suction end partly imports heat absorption in the storage heater, be back to again the compressor air suction end, compared with prior art, take full advantage of the heat in the outdoor heat exchanger, so that the heat in the storage heater is all for temperature and the enthalpy of rising low-temp low-pressure gaseous coolant, obviously, suction superheat and the enthalpy of compressor air suction end refrigerant have been improved significantly, thereby improved significantly the temperature of compressor air-discharging end refrigerant, and then improved significantly the temperature of whole system refrigerant, namely improved significantly the temperature of refrigerant in the outdoor heat exchanger, reduce the required defrosting time of outdoor heat exchanger, and then improved the defrosting efficiency of heat pump type air corditioning system.
Simultaneously, in the above-mentioned heat pump type air corditioning system, to partly import in the storage heater from the refrigerant that cross valve flows into the compressor air suction end, because storage heater is arranged on the compressor, compressor is apart from the close together of cross valve, will partly import in the storage heater from the refrigerant that indoor heat exchanger flows into expansion valve with prior art and compare, obviously, required pipeline is shorter, has simplified the pipeline of this heat pump type air corditioning system; Also reduced the cost of this heat pump type air corditioning system.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the heat pump type air corditioning system that Fig. 1 provides for the utility model embodiment;
The another kind of structural representation of the heat pump type air corditioning system that Fig. 2 provides for the utility model embodiment;
The heating mode defrosting schematic diagram of the heat pump type air corditioning system that Fig. 3 provides for the utility model embodiment;
The refrigeration mode defrosting schematic diagram of the heat pump type air corditioning system that Fig. 4 provides for the utility model embodiment.
Among upper Fig. 1-4:
Indoor heat exchanger 1, expansion valve 2, outdoor heat exchanger 3, flash vessel 4, compressor 5, cross valve 6, storage heater 7, the first pipeline 8, the second two-port valve 9, the first two-port valve 10, hot gas bypass circuit 11, the 3rd two-port valve 12, aeration valve 13, tonifying Qi loop 14, the second pipeline 15, heating circuit 16, the 3rd pipeline 17, triple valve 18, gas-liquid separator 19.
The specific embodiment
The utility model embodiment provides a kind of heat pump type air corditioning system, take full advantage of the heat in the outdoor heat exchanger, suction superheat and the enthalpy of compressor air suction end refrigerant have been improved significantly, reduce the required defrosting time of outdoor heat exchanger, and then improved the defrosting efficiency of heat pump type air corditioning system.
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The heat pump type air corditioning system that the utility model embodiment provides, comprise: indoor heat exchanger 1, outdoor heat exchanger 3, compressor 5, cross valve 6, storage heater 7 and accumulation of heat loop, wherein, cross valve 6 is connected with suction end end and exhaust end, indoor heat exchanger 1 and the outdoor heat exchanger 3 of compressor 5 respectively, and cross valve 6 links to each other with the suction end of compressor 5 by the first pipeline 8; Storage heater 7 is wrapped on compressor 5 outer walls; Be in series with storage heater 7 on the accumulation of heat loop, and the accumulation of heat loop is in parallel with the first pipeline 8, as depicted in figs. 1 and 2.Storage heater 7 is used for absorbing the heat of compressor 5 outer walls, and the refrigerant heating to flowing into from the accumulation of heat loop.Be provided with expansion valve 2 between outdoor heat exchanger 3 and the indoor heat exchanger 1.
Heating and defrosting process and the principle of the heat pump type air corditioning system that the utility model embodiment provides are as follows:
Open the accumulation of heat loop, be about to partly import the accumulation of heat loop from the refrigerant that cross valve 6 flows into the suction end of compressor 5, this part refrigerant flows in the storage heater 7, storage heater 7 has gathered the heat of compressor 5 outer walls, owing to adopt the refrigerant that flows into the suction end of compressor 5 from cross valve 6 partly to enter the accumulation of heat loop, namely this refrigerant has passed through outdoor heat exchanger 3, absorbing heat becomes low-pressure low-temperature gas in outdoor heat exchanger 3, the low-temp low-pressure gaseous coolant is partly imported in the storage heater 7, so that the heat in the storage heater 7 all is used for temperature and the enthalpy of this low-temp low-pressure gaseous coolant of rising, it is larger that thereby the temperature of this refrigerant and enthalpy raise, then this refrigerant flows into the suction end of compressor 5, converge with the low-temp low-pressure gaseous coolant of not heat absorption and enter compressor 5, sensible heat very, suction superheat and the enthalpy of compressor 5 suction end refrigerants have been improved significantly, thereby Effective Raise the temperature of compressor 5 exhaust end refrigerants, and then Effective Raise the temperature of whole system refrigerant, namely improve significantly the temperature of refrigerant in the outdoor heat exchanger 3, and then improved the defrosting efficiency of outdoor heat exchanger 3.
By above-mentioned defrost process and principle as can be known, the heat pump type air corditioning system that the utility model embodiment provides, by setting up the accumulation of heat loop in parallel with the first pipeline 8, and be series on the accumulation of heat loop, and be wrapped in storage heater 7 on compressor 5 outer walls, wherein the first pipeline 8 is the pipeline of the suction end that is communicated with cross valve 6 and compressor 5.Because the accumulation of heat loop is in parallel with the first pipeline 8, be the low-temp low-pressure gaseous coolant through outdoor heat exchanger 3 heat absorptions so that flow into the refrigerant of storage heater 7, the low-temp low-pressure gaseous coolant that soon should flow into compressor 5 suction ends partly imports storage heater 7 interior heat absorptions, be back to again compressor 5 suction ends, compared with prior art, take full advantage of the heat in the outdoor heat exchanger 3, so that the heat in the storage heater 7 is all for temperature and the enthalpy of rising low-temp low-pressure gaseous coolant, obviously, suction superheat and the enthalpy of compressor 5 suction end refrigerants have been improved significantly, thereby improved significantly the temperature of compressor 5 exhaust end refrigerants, and then improved significantly the temperature of whole system refrigerant, namely improved significantly the temperature of refrigerant in the outdoor heat exchanger 3, reduce the required defrosting time of outdoor heat exchanger 3, and then improved the defrosting efficiency of heat pump type air corditioning system.
Simultaneously, in the heat pump type air corditioning system that above-described embodiment provides, to partly import in the storage heater 7 from the refrigerant that cross valve 6 flows into compressor 5 suction ends, because storage heater 7 is arranged on the compressor 5, compressor 5 is apart from the close together of cross valve 6, will partly import in the storage heater from the refrigerant that indoor heat exchanger flows into expansion valve with prior art and compare, obviously, required pipeline is shorter, has simplified the pipeline of this heat pump type air corditioning system; Also reduced the cost of this heat pump type air corditioning system.
Liquid hit phenomenon appears for fear of compressor 5; in the heat pump type air corditioning system that above-described embodiment provides; the first pipeline 8 and accumulation of heat loop are connected by the suction end of gas-liquid separator 19 with compressor 5, thereby avoid liquid refrigerants to flow into compressor 5, realize the protection to compressor 5.
For the ease of the accumulation of heat loop is controlled, in the heat pump type air corditioning system that above-described embodiment provides, be in series with the first two-port valve 10 on the accumulation of heat loop; Be in series with the second two-port valve 9 on the first pipeline 8.The first two-port valve 10 and the second two-port valve 9 are respectively applied to regulate the coolant quantity in accumulation of heat loop and the first pipeline 8, and concrete regulated quantity is decided according to the frosting situation of outdoor heat exchanger 3.Certainly, regulate the coolant quantity in accumulation of heat loop and the first pipeline 8, also can adopt other mode, particularly, the first pipeline 8 and accumulation of heat loop are connected with cross valve 6 by triple valve 18, as shown in Figure 2.Like this, can reduce the use amount of valve, reduce the parts of this heat pump type air corditioning system, be convenient to realize the control of coolant quantity.
When the temperature of storage heater 7 was hanged down, the heat that imports the refrigerant absorption of storage heaters 7 from cross valve 6 can reduce, and causes the temperature of this refrigerant lower, affects defrosting effect.In order to address the above problem, the heat pump type air corditioning system that above-described embodiment provides also comprises being in series with storage heater 7, and to the heating circuit 16 of storage heater 7 heating, the two ends of this heating circuit 16 are communicated with respectively the exhaust end of the first pipeline 8 and compressor 5.Because the refrigerant that compressor 5 is discharged is high pressure-temperature gas, can heat storage heater 7, improve the temperature of storage heater 7, and then increase the heat that the refrigerant in the accumulation of heat loop flows into storage heater 7 absorbs, it is lower to have avoided occurring to import the temperature of refrigerant of suction end of compressors 5 from storage heater 7, and then has reduced the harmful effect to outdoor heat exchanger 3 defrostings when low of the temperature of storage heater 7; Simultaneously, the refrigerant of heating behind the storage heater 7 flows into the suction end of compressor 5, converges temperature and the enthalpy of the refrigerant of the suction end that has also improved to a certain extent compressor with the colder refrigerant that flows into compressors 5 from the first pipeline 7, further improved defrosting efficiency.
In the heat pump type air corditioning system that above-described embodiment provides, because importing the refrigerant of heating circuit 16 is high temperature and high pressure gas, this high temperature and high pressure gas will converge with low-temp low-pressure gas, in order to reduce potential safety hazard, the preferential selection is in series with the first bypass capillary on the heating circuit 16, by the first bypass capillary high temperature and high pressure gas is carried out reducing pressure by regulating flow, the enthalpy of refrigerant is constant before and after the reducing pressure by regulating flow.
Preferably, the heat pump type air corditioning system that above-described embodiment provides, the hot gas bypass circuit 11 that also comprises an end communication chamber external heat exchanger 3, the other end of this hot gas bypass circuit 11 is connected with the exhaust end of compressor 5 and the pipeline between the indoor heat exchanger 1, the refrigerant that adopts compressor 5 to discharge partly imports outdoor heat exchanger 3, directly outdoor heat exchanger 3 is heated, and improve the temperature of refrigerant in the outdoor heat exchanger 3, further improved the defrosting effect of outdoor heat exchanger 3.The hot gas bypass circuit 11 wherein connection bit of an end is equipped with two kinds, and hot gas bypass circuit 11 can be connected with the exhaust end that is communicated with compressor 5 and the second pipeline 15 of cross valve 6, also can be connected with the 3rd pipeline 17 that is communicated with indoor heat exchanger 1 and cross valve 6.Which kind of connects in concrete employing, and the utility model is that embodiment does not limit particularly to this.For the ease of the coolant quantity in the control hot gas bypass circuit 11, preferentially select to be in series with on the hot gas bypass circuit 11 the 3rd two-port valve 12 and the second bypass capillary.
In order further to optimize technique scheme, in the heat pump type air corditioning system that above-described embodiment provides, the compressor of heat pump type air corditioning system is double-stage compressor or compound compressor, improves the operating efficiency of this heat pump type air corditioning system and improves the service behaviour of heat pump type air corditioning system.
When this air-conditioning system is multi-stage compression system, there is the situation of deficency, unfavorable to the defrosting of outdoor heat exchanger 3.Occur for fear of above-mentioned situation, the heat pump type air corditioning system that above-described embodiment provides comprises also that for the tonifying Qi loop 14 to compressor 5 interior tonifying Qi this tonifying Qi loop 14 is connected with the flash vessel 4 of heat-pump-type defrost system.For the ease of the coolant quantity in the control tonifying Qi loop 14, preferential selection is stated and is in series with aeration valve 13 on the tonifying Qi loop 14, and particularly, aeration valve 13 is two-port valve.
In the heat pump type air corditioning system that above-described embodiment provides, can be according to the concrete needs of reality, in the accumulation of heat loop, hot gas bypass circuit 11, tonifying Qi loop 14 arrange check valve, avoids occurring backflow phenomenon, the utility model embodiment does not limit particularly to this.
Based on the heat pump type air corditioning system that above-described embodiment provides, the utility model embodiment also provides a kind of Defrost method for this heat pump type air corditioning system, and the Defrost method of heat pump type air corditioning system comprises step:
SA: when satisfying default defrosting condition, control cross valve 6 switches to heating mode;
The phenomenon of frosting can appear in heat pump type air corditioning system when heating mode, when this heat pump type air corditioning system is in heating mode, need not to control cross valve 6 again and switch to heating mode, because be in heating mode.Default defrosting condition is specially outdoor environment temperature and is lower than or equals 5 ℃ and be higher than or equal-20 ℃.Certainly, also can be other conditions, for example in heating process, the coil temperature of outdoor heat exchanger 3 is lower than or equals-5 ℃, and perhaps the coil temperature of outdoor heat exchanger 3 is lower 10 ℃ than outdoor environment temperature.Default defrosting condition determines that according to specific works state, outdoor environment temperature and the indoor environment temperature of heat pump type air corditioning system the utility model embodiment does not limit particularly to this.
SB: will partly import in the storage heater 7 that is wrapped on compressor 5 outer walls from the refrigerant that cross valve 6 flows into the suction end of compressor 5;
Owing to adopt the refrigerant that flows into the suction end of compressor 5 from cross valve 6 partly to enter the accumulation of heat loop, namely this refrigerant has passed through outdoor heat exchanger 3, and the heat in the absorption chamber external heat exchanger 3, become low-pressure low-temperature gas, then take full advantage of the heat low-temp low-pressure gaseous coolant fully heat absorption in storage heater 7 in the outdoor heat exchanger 3, so that the heat in the storage heater 7 all is used for temperature and the enthalpy of rising low-temp low-pressure gaseous coolant, i.e. the temperature of this refrigerant and enthalpy rising larger.
SC: the refrigerant that will absorb storage heater 7 interior heats imports the suction end of compressor 5;
The refrigerant that will absorb heat in storage heater 7 imports the suction end of compressor 5, converges and enter the suction end of compressor 5 with the low-temp low-pressure gaseous coolant of not heat absorption, obviously, has improved significantly suction superheat and the enthalpy of compressor 5 suction end refrigerants.
SD: the refrigerant after compressor 5 compressions is imported outdoor heat exchanger 3 through cross valve 6 and indoor heat exchanger 1;
Owing to improved significantly suction superheat and the enthalpy of compressor 5 suction end refrigerants, thereby Effective Raise the temperature of compressor 5 exhaust end refrigerants, and then improved significantly the temperature of whole system refrigerant, namely improved significantly the temperature of refrigerant in the outdoor heat exchanger 3, reduce the required defrosting time of outdoor heat exchanger 3, and then improved the defrosting efficiency of outdoor heat exchanger 3.
The Defrost method of the heat pump type air corditioning system that the utility model embodiment provides, make the refrigerant that flows into storage heater 7 be the low-temp low-pressure gaseous coolant through outdoor heat exchanger 3 heat absorptions, the low-temp low-pressure gaseous coolant that soon should flow into compressor 5 suction ends partly imports storage heater 7 interior heat absorptions, be back to again compressor 5 suction ends, partly import in the storage heater with refrigerant that prior art flows into expansion valve from indoor heat exchanger and to compare, take full advantage of the heat in the outdoor heat exchanger 3, so that the heat in the storage heater 7 is all for temperature and the enthalpy of rising low-temp low-pressure gaseous coolant, obviously, suction superheat and the enthalpy of compressor 5 suction end refrigerants have been improved significantly, thereby improved significantly the temperature of compressor 5 exhaust end refrigerants, and then improved significantly the temperature of whole system refrigerant, namely improve significantly the temperature of refrigerant in the outdoor heat exchanger 3, and then improved the defrosting efficiency of heat pump type air corditioning system.
Preferably, in the Defrost method of the heat pump type air corditioning system that above-described embodiment provides, also comprise step after between step SA and the step SC: the refrigerant that described compressor 5 is discharged partly imports storage heater 7 interior heat releases, then the refrigerant after the heat release is imported the suction end of compressor 5.Because the refrigerant that compressor 5 is discharged is high pressure-temperature gas, storage heater 7 is heated, improve the temperature of storage heater 7, and then increase the heat of the refrigerant absorption in the accumulation of heat loop flows into storage heater 7, it is lower to have avoided occurring to import the temperature of refrigerant of suction end of compressors 5 from storage heater 7, and then has reduced the harmful effect to outdoor heat exchanger 3 defrostings when low of the temperature of storage heater 7; Simultaneously, refrigerant after the heat release flows into the suction end of compressor 5, converges temperature and the enthalpy of the refrigerant of the suction end that has also improved to a certain extent compressor with the colder refrigerant that flows into compressors 5 from the first pipeline 7, has further improved defrosting efficiency.
Preferably, in the Defrost method of the heat pump type air corditioning system that above-described embodiment provides, also comprise step behind step SA: the refrigerant that will flow into from the exhaust end of compressor 5 indoor heat exchanger 1 partly imports outdoor heat exchanger 3.The refrigerant that adopts compressor 5 to discharge partly imports outdoor heat exchanger 3, directly outdoor heat exchanger 3 is heated, and improves the temperature of refrigerant in the outdoor heat exchanger 3, has further improved the defrosting efficiency of outdoor heat exchanger 3.
When the compressor of this heat pump type air corditioning system is double-stage compressor or compound compressor, there is the situation of deficency, unfavorable to the defrosting of outdoor heat exchanger 3.Occur for fear of above-mentioned situation, in the Defrost method of the heat pump type air corditioning system that above-described embodiment provides, behind step SA, also comprise step: to compressor 5 interior tonifying Qi.
Preferably, in the Defrost method of the heat pump type air corditioning system that above-described embodiment provides, also comprise step behind step SA: outdoor temperature is lower than or when equaling 5 ℃, outdoor fan stops operating.Owing in the time of defrosting, have high temperature refrigerant to flow through in the outdoor heat exchanger 3 and defrost, this moment, high temperature refrigerant generally can be higher than outdoor environment temperature, defrosts in order to guarantee high temperature refrigerant, needs outdoor fan to stop operating, and avoids the high temperature refrigerant cooling.
In order further to optimize technique scheme, the Defrost method of the heat pump type air corditioning system that above-described embodiment provides also comprises step SA' before step SA:
When outdoor environment temperature was lower than-20 ℃ or coolant quantity and is lower than preset value, control cross valve 6 switched to refrigeration mode;
Control outer blower fan and stop operating, and will partly import the storage heater 7 interior heat absorptions that are wrapped on compressor 5 outer walls from the refrigerant that indoor heat exchanger 1 flows into the suction end of compressor 5;
Refrigerant in the storage heater 7 is imported the suction end of compressor 5;
Refrigerant after compressor 5 compressions is imported outdoor heat exchanger 3 through cross valve 6.
When lower or coolant quantity is not enough at outdoor environment temperature (causing defrosting at need), adopt first cross valve 6 reverse cycle defrosts, namely heat pump type air corditioning system is converted to refrigeration mode, under refrigeration mode, defrost, i.e. and refrigeration mode defrosting, as shown in Figure 4.When outdoor environment temperature is greater than or equal to-20 ℃, again control cross valve 6 commutations, even this heat pump type air corditioning system is converted to heating mode, continues defrosting and carry out heat supply.Like this, can accelerate the defrosting speed of heat pump type air corditioning system, finish as early as possible defrosting, further improve the defrosting efficiency of this heat pump type air corditioning system.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the utility model.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from spirit or scope of the present utility model, realize in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (8)

1. heat pump type air corditioning system, comprise: indoor heat exchanger (1), outdoor heat exchanger (3), compressor (5), with the cross valve (6) that suction end and exhaust end, described indoor heat exchanger (1) and the described outdoor heat exchanger (3) of described compressor (5) are connected, described cross valve (6) links to each other with the suction end of described compressor (5) by the first pipeline (8); It is characterized in that, also comprise:
Be wrapped in the storage heater (7) on described compressor (5) outer wall;
Be in series with the accumulation of heat loop of described storage heater (7), described accumulation of heat loop is in parallel with described the first pipeline (8).
2. heat pump type air corditioning system according to claim 1 is characterized in that, described the first pipeline (8) and described accumulation of heat loop are connected by the suction end of gas-liquid separator (19) with described compressor (5).
3. heat pump type air corditioning system according to claim 1 is characterized in that, is in series with the first two-port valve (10) on the described accumulation of heat loop; Be in series with the second two-port valve (9) on described the first pipeline (8).
4. heat pump type air corditioning system according to claim 1 is characterized in that, described the first pipeline (8) and described accumulation of heat loop are connected with described cross valve (6) by triple valve (18).
5. heat pump type air corditioning system according to claim 1, it is characterized in that, also comprise and be in series with described storage heater (7), and to the heating circuit (16) of described storage heater (7) heating, the two ends of described heating circuit (16) are communicated with respectively the exhaust end of described the first pipeline (8) and described compressor (5).
6. heat pump type air corditioning system according to claim 1, it is characterized in that, comprise that also an end is communicated with the hot gas bypass circuit of described outdoor heat exchanger (3) (11), the other end of described hot gas bypass circuit (11) is connected with the exhaust end that is communicated with described compressor (5) and second pipeline (15) of described cross valve (6), perhaps is connected with the 3rd pipeline (17) that is communicated with described indoor heat exchanger (1) and described cross valve (6); Be in series with the 3rd two-port valve (12) on the described hot gas bypass circuit (11).
7. the described heat pump type air corditioning system of any one is characterized in that according to claim 1-6, and the compressor of heat pump type air corditioning system is double-stage compressor or compound compressor.
8. heat pump type air corditioning system according to claim 7, it is characterized in that, also comprise for the tonifying Qi loop (14) to the interior tonifying Qi of described compressor (5), described tonifying Qi loop (14) is connected with the flash vessel (4) of heat-pump-type defrost system, and is in series with aeration valve (13) on the described tonifying Qi loop (14).
CN 201220372660 2012-07-30 2012-07-30 Heat-pump air-conditioning system Withdrawn - After Issue CN202692530U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103574966A (en) * 2012-07-30 2014-02-12 珠海格力电器股份有限公司 Heat-pump air conditioning system and defrosting method for same
WO2015032293A1 (en) * 2013-09-05 2015-03-12 珠海格力电器股份有限公司 Refrigeration- and heat accumulation method and refrigeration- and heating anti-frost method and air conditioning system
CN104567073A (en) * 2013-10-28 2015-04-29 珠海格力电器股份有限公司 Air conditioning cycle system
CN104764087A (en) * 2014-01-07 2015-07-08 海尔集团公司 Two-stage heating air conditioning system with defrosting function and control method thereof
CN106225290A (en) * 2016-07-15 2016-12-14 珠海格力电器股份有限公司 Air-conditioning and control method thereof
CN107178924A (en) * 2017-05-23 2017-09-19 华中科技大学 A kind of accumulation of heat is not shut down except defrosting system and air-conditioning
CN108759167A (en) * 2018-04-22 2018-11-06 北京工业大学 The reinforcing for bypassing tonifying Qi joint compressor housing accumulation of heat heats heat pump system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103574966A (en) * 2012-07-30 2014-02-12 珠海格力电器股份有限公司 Heat-pump air conditioning system and defrosting method for same
CN103574966B (en) * 2012-07-30 2015-09-09 珠海格力电器股份有限公司 Heat pump type air corditioning system and Defrost method thereof
WO2015032293A1 (en) * 2013-09-05 2015-03-12 珠海格力电器股份有限公司 Refrigeration- and heat accumulation method and refrigeration- and heating anti-frost method and air conditioning system
CN104422193A (en) * 2013-09-05 2015-03-18 珠海格力电器股份有限公司 Refrigeration and heating liquid accumulation methods, refrigeration and heating frost prevention methods and air conditioning system
CN104422193B (en) * 2013-09-05 2016-08-31 珠海格力电器股份有限公司 Freeze, heat storage liquid method and refrigeration, heat frost prevention method and air-conditioning system
CN104567073A (en) * 2013-10-28 2015-04-29 珠海格力电器股份有限公司 Air conditioning cycle system
CN104764087A (en) * 2014-01-07 2015-07-08 海尔集团公司 Two-stage heating air conditioning system with defrosting function and control method thereof
CN104764087B (en) * 2014-01-07 2017-11-28 海尔集团公司 A kind of two-stage heating air conditioner system for possessing defrosting function and its control method
CN106225290A (en) * 2016-07-15 2016-12-14 珠海格力电器股份有限公司 Air-conditioning and control method thereof
CN107178924A (en) * 2017-05-23 2017-09-19 华中科技大学 A kind of accumulation of heat is not shut down except defrosting system and air-conditioning
CN108759167A (en) * 2018-04-22 2018-11-06 北京工业大学 The reinforcing for bypassing tonifying Qi joint compressor housing accumulation of heat heats heat pump system

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