CN103574798B - Heat pump type air corditioning system and sensible heat defrost method and thermal storage defrosting method - Google Patents

Heat pump type air corditioning system and sensible heat defrost method and thermal storage defrosting method Download PDF

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Publication number
CN103574798B
CN103574798B CN201210266790.9A CN201210266790A CN103574798B CN 103574798 B CN103574798 B CN 103574798B CN 201210266790 A CN201210266790 A CN 201210266790A CN 103574798 B CN103574798 B CN 103574798B
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compressor
heat exchanger
type air
pump type
valve
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CN103574798A (en
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段亮
孟琪林
梁志滔
熊军
陈绍林
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Abstract

The invention discloses a kind of heat pump type air corditioning system, comprise indoor heat exchanger; Outdoor heat exchanger; Connect the first pipeline of indoor heat exchanger and outdoor heat exchanger; Be connected in series with the expansion valve on the first pipeline; For the compressor of compression refrigerant steam; The cross valve be connected with input and output, indoor heat exchanger and the outdoor heat exchanger of compressor; One end is connected to the accumulation of heat loop between expansion valve on the first pipeline and outdoor heat exchanger, the first two-port valve and be wrapped in the storage heater of compressor outer wall of contacting in accumulation of heat loop, and the other end in accumulation of heat loop is connected with the input of compressor; Between the output that one end is connected to compressor and indoor heat exchanger, the hot gas bypass circuit of other end junction chamber external heat exchanger, hot gas bypass circuit is contacted the second two-port valve and throttling arrangement.Above-mentioned heat pump type air corditioning system improves and flows into the refrigerant of storage heater and the temperature difference of storage heater, effectively improves defrosting effect.Present invention also offers a kind of sensible heat defrost method and thermal storage defrosting method.

Description

Heat pump type air corditioning system and sensible heat defrost method and thermal storage defrosting method
Technical field
The present invention relates to air conditioner technical field, particularly a kind of heat pump type air corditioning system and sensible heat defrost method and thermal storage defrosting method.
Background technology
In heat pump type air corditioning system heating operations, when ambient temperature is lower, easy frosting on outdoor heat exchanger, the heat transfer effect of outdoor heat exchanger is reduced, thus affect the carrying out of heat pump type air corditioning system heating operations, when frosting acquires a certain degree, indoor heating effect is reduced, indoor heat exchanger even can be made to heat, namely cannot blow out and heat wind higher than indoor temperature.At this time just need the frosting removed on outdoor heat exchanger, to recover its heat transfer effect, guarantee the heating effect of indoor heat exchanger.
Along with rising steadily of energy prices, the application of energy-efficient heat pump type air corditioning system is more and more wider, its Defrost technology mostly is and is connected accumulation of heat loop between expansion valve with indoor set, and a part of refrigerant is directly imported accumulation of heat loop by indoor heat exchanger, and flow in the storage heater be coated on compressor outer wall construction, in storage heater, the heat of compressor operating generation is absorbed by refrigerant, and by the refrigerant after heat absorption by being delivered in outdoor heat exchanger after the compression of compressor, to improve the temperature in outdoor heat exchanger, finally reach the effect to outdoor heat exchanger defrosting.
Because the storage heater temperature in heat pump type air corditioning system is general not high, in defrost process, refrigerant is after flowing through indoor heat exchanger, directly enter storage heater, make the temperature difference of the refrigerant of inflow storage heater and storage heater less, be unfavorable for that refrigerant absorbs heat after inflow storage heater, even can occur time serious storage heater temperature lower than or equal refrigerant temperature, refrigerant cannot be absorbed heat in storage heater, on the contrary can heat release, cannot meet and carry out defrost operation in heat pump type air corditioning system, make defrosting effect lower.
Therefore, how improving and flow into the refrigerant of storage heater and the temperature difference of storage heater, to improve defrosting effect, is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of heat pump type air corditioning system, flow into the refrigerant of storage heater and the temperature difference of storage heater to improve, and then improve defrosting effect.Present invention also offers a kind of sensible heat defrost method of above-mentioned heat pump type air corditioning system and a kind of thermal storage defrosting method.
For achieving the above object, the invention provides following technical scheme:
A kind of heat pump type air corditioning system, comprising:
Indoor heat exchanger;
Outdoor heat exchanger;
Connect the first pipeline of described indoor heat exchanger and described outdoor heat exchanger;
Be connected in series with the expansion valve on described first pipeline;
For the compressor of compression refrigerant steam;
The cross valve be connected with input and output, described indoor heat exchanger and the described outdoor heat exchanger of described compressor;
One end is connected to the accumulation of heat loop between described expansion valve on described first pipeline and described outdoor heat exchanger, described accumulation of heat loop is connected with the first two-port valve and the storage heater being wrapped in described compressor outer wall, the other end in described accumulation of heat loop is connected with the input of described compressor;
Between the output that one end is connected to described compressor and described indoor heat exchanger, the other end connects the hot gas bypass circuit of described outdoor heat exchanger, described hot gas bypass circuit is connected with the second two-port valve and throttling arrangement.
Preferably, described hot gas bypass circuit is provided with by first check valve of described compressor to described outdoor heat exchanger direction conducting.
Preferably, also comprise and being connected in series with on described first pipeline and the flash vessel be arranged between described expansion valve and described outdoor heat exchanger, be connected with the tonifying Qi pipeline to described compressor tonifying Qi between described flash vessel and described compressor, described tonifying Qi pipeline be connected with the 3rd two-port valve.
Preferably, also comprise and be connected in series with on described first pipeline and be arranged between described flash vessel and described outdoor heat exchanger, for the throttle capillary tube of reducing pressure by regulating flow.
Preferably, described tonifying Qi pipeline is provided with the second check valve of conducting when flowing to described compressor by described flash vessel.
Preferably, described compressor is compound compressor.
Present invention also offers a kind of sensible heat defrost method for the heat pump type air corditioning system as described in any one of such scheme, comprise step:
A: when outdoor temperature is higher than-20 DEG C, the input that control cross valve switches to compressor is connected with outdoor heat exchanger, and the output of compressor is connected with indoor heat exchanger;
B: open the first two-port valve, is delivered to a part for the refrigerant by expansion valve the storage heater being wrapped in described compressor outer wall and absorbs heat;
C: the refrigerant absorbing heat is imported described compressor;
D a: part for the refrigerant of the absorption heat after described compressor compresses is imported described outdoor heat exchanger through hot gas bypass circuit.
Preferably, also step is comprised: tonifying Qi in described compressor.
Present invention also offers a kind of thermal storage defrosting method for the heat pump type air corditioning system as described in any one of such scheme, comprise step:
A: when outdoor temperature is lower than-20 DEG C or cold medium shortage, the input that control cross valve switches to compressor is connected with indoor heat exchanger, and the output of compressor is connected with outdoor heat exchanger;
B: open the first two-port valve, to be delivered to a part for the refrigerant by outdoor heat exchanger on the storage heater being wrapped in described compressor outer wall and to absorb heat;
C: the refrigerant absorbing heat is imported described compressor;
D: the refrigerant of the absorption heat after described compressor compresses is imported described outdoor heat exchanger through described cross valve.
Preferably, also step is comprised: tonifying Qi in described compressor.
As can be seen from above-mentioned technical scheme, in heat pump type air corditioning system provided by the invention, one end, accumulation of heat loop is connected between expansion valve and outdoor heat exchanger, and the other end is connected with the input of compressor, and accumulation of heat loop is provided with the storage heater being wrapped in compressor outer wall.In defrost process, refrigerant flows into expansion valve by indoor heat exchanger, by the effect that expansion valve step-down is lowered the temperature, thus the refrigerant temperature flowing into storage heater is reduced, by opening the first two-port valve, make a part of refrigerant through expansion valve decrease temperature and pressure enter storage heater, and then improve the inflow refrigerant of storage heater and the temperature difference of storage heater, improve the heat of absorption, effectively improve defrosting effect.
Above-mentioned sensible heat defrost method and thermal storage defrosting method provide based on above-mentioned heat pump type air corditioning system, and therefore above-mentioned sensible heat defrost method and thermal storage defrosting method have all technique effects of above-mentioned heat pump type air corditioning system, repeat no more herein.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the first detailed description of the invention of the heat pump type air corditioning system that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the second detailed description of the invention of the heat pump type air corditioning system that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the third detailed description of the invention of the heat pump type air corditioning system that Fig. 3 provides for the embodiment of the present invention;
Defrosting flow chart during the sensible heat defrost of the heat pump type air corditioning system that Fig. 4 provides for the embodiment of the present invention;
The flow chart of the sensible heat defrost method of the heat pump type air corditioning system that Fig. 5 provides for the embodiment of the present invention;
Defrosting schematic diagram during the thermal storage defrosting of the heat pump type air corditioning system that Fig. 6 provides for the embodiment of the present invention;
The flow chart of the thermal storage defrosting method of the heat pump type air corditioning system that Fig. 7 provides for the embodiment of the present invention.
Detailed description of the invention
The invention discloses a kind of heat pump type air corditioning system, flow into the refrigerant of storage heater and the temperature difference of storage heater to improve, and then improve defrosting effect.Present invention also offers a kind of sensible heat defrost method of above-mentioned heat pump type air corditioning system and a kind of thermal storage defrosting method.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, Fig. 2 and Fig. 3, the structural representation of the first detailed description of the invention of the heat pump type air corditioning system that Fig. 1 provides for the embodiment of the present invention; The structural representation of the second detailed description of the invention of the heat pump type air corditioning system that Fig. 2 provides for the embodiment of the present invention; The structural representation of the third detailed description of the invention of the heat pump type air corditioning system that Fig. 3 provides for the embodiment of the present invention.
Embodiments provide a kind of heat pump type air corditioning system, comprising: indoor heat exchanger 1; Outdoor heat exchanger 2; Connect the first pipeline of indoor heat exchanger 1 and outdoor heat exchanger 2; Be connected in series with the expansion valve 3 on the first pipeline; For the compressor 4 of compression refrigerant steam; The cross valve 5 be connected with input and output, indoor heat exchanger 1 and the outdoor heat exchanger 2 of compressor 4; One end is connected to the accumulation of heat loop between expansion valve 3 on the first pipeline and outdoor heat exchanger 2, and accumulation of heat loop is connected with the first two-port valve 8 and is wrapped in the storage heater 6 of compressor 4 outer wall, the other end in accumulation of heat loop is connected with the input of compressor 4; Between the output that one end is connected to compressor 4 and indoor heat exchanger 1, the hot gas bypass circuit of other end junction chamber external heat exchanger 2, hot gas bypass circuit is connected with the second two-port valve 9 and throttling arrangement.
In the heat pump type air corditioning system that the embodiment of the present invention provides, one end, accumulation of heat loop is connected between expansion valve 3 and outdoor heat exchanger 2, and the other end is connected with the input of compressor 4, and accumulation of heat loop is provided with the storage heater 6 being wrapped in compressor 4 outer wall.In defrost process, refrigerant flows into expansion valve 3 by indoor heat exchanger 1, by the effect of expansion valve 3 step-down cooling, thus the refrigerant temperature flowing into storage heater 6 is reduced, by opening the first two-port valve 8, the a part of refrigerant through expansion valve 3 decrease temperature and pressure is made to enter storage heater 6, and then improve the inflow refrigerant of storage heater 6 and the temperature difference of storage heater 6, improve the heat of absorption, the refrigerant absorbing heat is transported in outdoor heat exchanger 2 through hot gas bypass circuit, defrost operation is carried out to it, effectively improves defrosting effect.
It should be noted that, absorb heat refrigerant through compressor 4 compress laggard enter outdoor heat exchanger 2, pressure reduction is there is between compressor 4 and outdoor heat exchanger 2, in order to regulate pressure reduction, hot gas bypass circuit is connected with the second two-port valve 9 and throttling arrangement, and throttling arrangement can be capillary or electric expansion valve, under the second two-port valve 9 opening, the refrigerant of absorption heat is made to enter outdoor heat exchanger 2 by the reduced pressure operation of throttling arrangement.
Between the output that one end of hot gas bypass circuit is connected to compressor 4 and indoor heat exchanger 1, and be connected with cross valve 5 between the output of compressor 4 and indoor heat exchanger 1.
As shown in Figure 2, preferably one end of hot gas bypass circuit is connected between the output of compressor 4 and cross valve 5, makes to carry when avoiding refrigerant to flow through cross valve 5 and absorb thermal loss through storage heater 6, reduce defrosting effect.
As shown in Figure 3, one end of hot gas bypass circuit is connected between cross valve 5 and indoor heat exchanger 1, all can realizes defrost operation, and all within protection domain.
Preferably, the throttling arrangement that hot gas bypass circuit is contacted is bypass capillary 10, by the effect of bypass capillary 10, so that carry out the adjustment of reducing pressure by regulating flow to hot gas bypass circuit.
Second two-port valve 9 is all connected in series with in hot gas bypass circuit with bypass capillary 10, and does not limit the position that is oppositely arranged of the two.
In order to guarantee that the refrigerant flowed in hot gas bypass circuit does not reflux further, hot gas bypass circuit is provided with by first check valve of compressor 4 to outdoor heat exchanger 2 direction conducting.
As shown in Figure 2, along with rising steadily of energy prices, the application of energy-efficient heat pump type air corditioning system is more and more wider, in order to increase refrigerant circulation, the heat pump type air corditioning system that the embodiment of the present invention provides also comprises and being connected in series with on described first pipeline and the flash vessel 7 be arranged between expansion valve 3 and outdoor heat exchanger 2, be connected with the tonifying Qi pipeline to compressor 4 tonifying Qi between flash vessel 7 and compressor 4, described tonifying Qi pipeline be connected with the 3rd two-port valve 12.
As shown in Figure 2, refrigerant is wherein a part of step-down gasification after inflow flash vessel 7, forms the steam of refrigerant, and tonifying Qi pipeline is connected with flash vessel 7, by opening the 3rd two-port valve 12, namely by the steam of flash vessel 7 to compressor 2 coolant adding, not enough with the inspiratory capacity made up due to compressor 4.Tonifying Qi effect due to flash vessel 7 makes the compression horsepower of compressor 4 significantly rise, and improves the flow of the refrigerant of the output of compressor 4, and then improves the heat that refrigerant flows into outdoor heat exchanger 2 within the unit interval, is conducive to the carrying out of accelerating defrost operation,
Preferably, also comprise and be connected in series with on the first pipeline and be arranged between flash vessel 7 and outdoor heat exchanger 2, for the throttle capillary tube 11 of reducing pressure by regulating flow.Acted on by throttle capillary tube 11, reducing pressure by regulating flow is carried out to the refrigerant being flowed to outdoor heat exchanger 2 by flash vessel 7.
In order to guarantee that the refrigerant flowed in tonifying Qi pipeline does not reflux further, tonifying Qi pipeline is provided with the second check valve of conducting when flowing to compressor 4 by flash vessel 7.Preferred flash vessel 7 is electrical heating flash vessel, by increasing by the second check valve, effectively prevent the backflow that heating stops rear refrigerant.
In order to improve defrosting effect further, increase refrigerant amount of flow, compressor 4 is preferably compound compressor.By the compression of compound compressor to refrigerant, improve the compression degree of refrigerant, and then improve the coolant quantity flowing out compressor 4 in the unit interval, and then reach to improve and publish books by the object of effect.Also unit compressor can be selected as compressor 4, and concrete type of compressor does not limit and all in protection domain.
Please refer to Fig. 4 and Fig. 5, the defrosting flow chart during sensible heat defrost of the heat pump type air corditioning system that Fig. 4 provides for the embodiment of the present invention; The flow chart of the sensible heat defrost method of the heat pump type air corditioning system that Fig. 5 provides for the embodiment of the present invention.
The embodiment of the present invention additionally provides a kind of for such as any one the sensible heat defrost method of heat pump type air corditioning system above-mentioned, comprises step:
SA: when outdoor temperature is higher than-20 DEG C, control cross valve 5 rotates the input switching to compressor 4 and is connected with outdoor heat exchanger 2, and the output of compressor 4 is connected with indoor heat exchanger 1;
By set temperature induction installation on outdoor heat exchanger 2 or manual detection outdoor temperature, when outdoor temperature being detected higher than-20 DEG C, control cross valve 5 to rotate, the input of compressor 4 is connected with outdoor heat exchanger 2, and the output of compressor 4 is connected with indoor heat exchanger 1.It should be noted that, sensible heat defrost method is while heating operations, to the method that outdoor heat exchanger 2 defrosts.By when temperature is higher than-20 DEG C, rotates cross valve 5, guarantee to defrost while heating operations.
SB: open the first two-port valve 8, to be delivered to a part for the refrigerant by expansion valve 3 on the storage heater 6 being wrapped in compressor 4 outer wall and to absorb heat;
Refrigerant carries out decompression cooling by expansion valve 3, a part for refrigerant by expansion valve 3 is delivered on the storage heater 6 being wrapped in compressor 4 outer wall, because storage heater 6 is coated on the outer wall of compressor 4, heat production in compressor 4 course of work, make compressor 4 outside wall temperature higher, storage heater 6 by with compressor 4 wall contacts, absorb heat to improve the temperature of storage heater 6.When a part for refrigerant flows through storage heater 6, absorb the heat of storage heater 6, another part continues to flow to outdoor heat exchanger 2 by the refrigerant of expansion valve 3.
SC: the refrigerant absorbing heat is imported compressor 4;
After refrigerant absorbs heat, import compressor 4, effectively prevent the refrigerant flowing into compressor 4 and cross cold and cause liquid refrigerants on the impact of compressor 4.
SD a: part for the refrigerant of the absorption heat after compressing through compressor 4 is imported outdoor heat exchanger 2 through hot gas bypass circuit;
To the refrigerant of the heat of compressor 4 outer wall be absorbed after compressor 4 compresses, a part wherein flows into outdoor heat exchanger 2, and another part flows in indoor heat exchanger 1, effectively improve the temperature of indoor heat exchanger 1 in heating operations, and then improve the heating effect of indoor heat exchanger 1 in heating operations.
Also comprise step: tonifying Qi in compressor 4;
By increasing the compressed gas scale of construction in compressor 4, effectively can improve the pressure in compressor 4, compressor 4 power is caused significantly to rise, improve the flow of the refrigerant of the output of compressor 4, and then improve refrigerant within the unit interval, flow into the heat that outdoor heat exchanger 2 carries, be conducive to the carrying out of accelerating defrost operation.
Also comprise step: when outdoor temperature is higher than 5 DEG C, outdoor fan is rotated.When on outdoor heat exchanger 2 arrange temperature sensing device detect or manual detection to outdoor temperature higher than 5 DEG C time, start outdoor fan, by outdoor heat exchanger 2 and the heat convection effect of outside air, defrosting operation is carried out to the frosting of outdoor heat exchanger 2, improve defrosting efficiency.
Please refer to Fig. 5 and Fig. 6, the defrosting schematic diagram during thermal storage defrosting of the heat pump type air corditioning system that Fig. 5 provides for the embodiment of the present invention; The flow chart of the thermal storage defrosting method of the heat pump type air corditioning system that Fig. 6 provides for the embodiment of the present invention.
Present invention also offers a kind of for such as any one the thermal storage defrosting method of heat pump type air corditioning system above-mentioned, comprise step:
Sa: when outdoor temperature is lower than-20 DEG C or cold medium shortage, the input that control cross valve 5 switches to compressor 4 is connected with indoor heat exchanger 1, and the output of compressor 4 is connected with outdoor heat exchanger 2;
By being provided with temperature sensing device or manual detection outdoor temperature on outdoor heat exchanger, when outdoor temperature being detected lower than-20 DEG C, control cross valve 5 to rotate, the input of compressor 4 is connected with indoor heat exchanger 1, and the output of compressor 4 is connected with outdoor heat exchanger 2.It should be noted that, thermal storage defrosting method is that stopping heats cyclic process, only to the method that outdoor heat exchanger 2 defrosts, its inner refrigerant flow direction and kind of refrigeration cycle similar.By when temperature is lower than-20 DEG C, rotates cross valve 5, directly outdoor heat exchanger 2 is defrosted.
Due to can defrosting effect be reduced equally during cold medium shortage, so when cold medium shortage, in order to improve defrosting effect, just can not adopt the mode of sensible heat defrost, adopting aforesaid way to regulate cross valve 5 to carry out thermal storage defrosting.
Sb: open the first two-port valve 8, to be delivered to a part for the refrigerant by outdoor heat exchanger 2 on the storage heater 6 being wrapped in compressor 4 outer wall and to absorb heat;
Refrigerant carries out decompression cooling by outdoor heat exchanger 2, a part for refrigerant by outdoor heat exchanger 2 is delivered on the storage heater 6 being wrapped in compressor 4 outer wall, because storage heater 6 is coated on the outer wall of compressor 4, heat production in compressor 4 course of work, make compressor 4 outside wall temperature higher, storage heater 6 by with compressor 4 wall contacts, absorb heat to improve the temperature of storage heater 6, a part for refrigerant is delivered on storage heater 6, absorb the heat of storage heater 6, another part continues to flow to indoor heat exchanger 1 by the refrigerant of expansion valve 3.
Sc: the refrigerant absorbing heat is imported compressor 4;
After refrigerant absorbs heat, import compressor 4, effectively prevent the refrigerant flowing into compressor 4 and cross cold and cause liquid refrigerants on the impact of compressor 4.
Sd: the refrigerant of the absorption heat after compressing through compressor 4 is imported outdoor heat exchanger 2 through cross valve 5;
Now, indoor heat exchanger 1 is closed condition, and the refrigerant absorbing the heat of compressor 4 outer wall all flows into outdoor heat exchanger 2 through cross valve 5 after compressor 4 compresses, and accelerates the carrying out of defrost operation.
Also comprise step: tonifying Qi in compressor 4;
By increasing the compressed gas scale of construction in compressor 4, effectively can improve the pressure in compressor 4, compressor 4 power is caused significantly to rise, improve the flow of the refrigerant of the output of compressor 4, and then improve refrigerant within the unit interval, flow into the heat that outdoor heat exchanger 2 carries, be conducive to the carrying out of accelerating defrost operation.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (7)

1. a thermal storage defrosting method for heat pump type air corditioning system,
Heat pump type air corditioning system comprises:
Indoor heat exchanger (1);
Outdoor heat exchanger (2);
Connect the first pipeline of described indoor heat exchanger (1) and described outdoor heat exchanger (2);
Be connected in series with the expansion valve (3) on described first pipeline;
For the compressor (4) of compression refrigerant steam;
The cross valve (5) be connected with input and output, described indoor heat exchanger (1) and the described outdoor heat exchanger (2) of described compressor (4);
One end is connected to the accumulation of heat loop between described expansion valve (3) on described first pipeline and described outdoor heat exchanger (2), described accumulation of heat loop is connected with the first two-port valve (8) and is wrapped in the storage heater (6) of described compressor (4) outer wall, the other end in described accumulation of heat loop is connected with the input of described compressor (4);
Between the output that one end is connected to described compressor (4) and described indoor heat exchanger (1), the other end connects the hot gas bypass circuit of described outdoor heat exchanger (2), described hot gas bypass circuit is connected with the second two-port valve (9) and throttling arrangement;
It is characterized in that, comprise step:
A: when outdoor temperature is lower than-20 DEG C or cold medium shortage, the input that control cross valve (5) switches to compressor (4) is connected with indoor heat exchanger (1), and the output of compressor (4) is connected with outdoor heat exchanger (2);
B: open the first two-port valve (8), is delivered to the storage heater (6) being wrapped in described compressor (4) outer wall and goes up and absorb heat by a part for the refrigerant by outdoor heat exchanger (2);
C: the refrigerant absorbing heat is imported described compressor (4);
D: the refrigerant of the absorption heat after described compressor (4) compression is imported described outdoor heat exchanger (2) through described cross valve (5).
2. the thermal storage defrosting method of heat pump type air corditioning system as claimed in claim 1, is characterized in that, also comprise step: to described compressor (4) interior tonifying Qi.
3. the thermal storage defrosting method of heat pump type air corditioning system as claimed in claim 1, is characterized in that, described hot gas bypass circuit is connected with by first check valve of described compressor (4) to described outdoor heat exchanger (2) direction conducting.
4. the thermal storage defrosting method of heat pump type air corditioning system as claimed in claim 1, it is characterized in that, also comprise and being connected in series with on described first pipeline and the flash vessel (7) be arranged between described expansion valve (3) and described outdoor heat exchanger (2), be connected with the tonifying Qi pipeline to described compressor (4) tonifying Qi between described flash vessel (7) and described compressor (4), described tonifying Qi pipeline be connected with the 3rd two-port valve (12).
5. the thermal storage defrosting method of heat pump type air corditioning system as claimed in claim 4, it is characterized in that, also comprise and be connected in series with on described first pipeline and be arranged between described flash vessel (7) and described outdoor heat exchanger (2), for the throttle capillary tube (11) of reducing pressure by regulating flow.
6. the thermal storage defrosting method of heat pump type air corditioning system as claimed in claim 5, is characterized in that, described tonifying Qi pipeline is provided with by second check valve of described flash vessel (7) to described compressor (4) direction conducting.
7. the thermal storage defrosting method of the heat pump type air corditioning system as described in any one of claim 1 ~ 6, is characterized in that, described compressor (4) is compound compressor.
CN201210266790.9A 2012-07-30 2012-07-30 Heat pump type air corditioning system and sensible heat defrost method and thermal storage defrosting method Active CN103574798B (en)

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