CN104422193B - Freeze, heat storage liquid method and refrigeration, heat frost prevention method and air-conditioning system - Google Patents

Freeze, heat storage liquid method and refrigeration, heat frost prevention method and air-conditioning system Download PDF

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Publication number
CN104422193B
CN104422193B CN201310400653.4A CN201310400653A CN104422193B CN 104422193 B CN104422193 B CN 104422193B CN 201310400653 A CN201310400653 A CN 201310400653A CN 104422193 B CN104422193 B CN 104422193B
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China
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heat exchanger
liquid
expansion valve
valve
indoor heat
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CN104422193A (en
Inventor
何振健
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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 CN201310400653.4A priority Critical patent/CN104422193B/en
Priority to PCT/CN2014/085557 priority patent/WO2015032293A1/en
Publication of CN104422193A publication Critical patent/CN104422193A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/021—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit
    • F25B2313/0211—Indoor unit or outdoor unit with auxiliary heat exchanger not forming part of the indoor or outdoor unit the auxiliary heat exchanger being only used during defrosting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures

Abstract

The invention discloses a kind of air-conditioning system, including the phase change heat accumulator being wrapped on compressor outer wall, and phase change heat accumulator has the first liquid mouth and second excessively and crosses liquid mouth；The first storage liquid pipeline that one end is connected between the expansion valve on the first pipeline and outdoor heat exchanger, first stores the liquid pipeline other end is connected on the first mistake liquid mouth, and the first storage liquid pipeline be serially connected with the first two-port valve；The second storage liquid pipeline that one end is connected between the expansion valve on the first pipeline and indoor heat exchanger by triple valve, second stores the liquid pipeline other end is connected on the second mistake liquid mouth, and the second storage liquid pipeline be additionally provided with the pressure sensor of pressure in measuring phase change heat accumulator.The structure design of this air-conditioning system can be effectively realized and adjust the coolant quantity of circulation in air-conditioning system by the load condition of air-conditioning.The invention also discloses the refrigeration for above-mentioned air-conditioning system to store liquid method, heat storage liquid method, refrigeration frost prevention method and heat frost prevention method.

Description

Freeze, heat storage liquid method and refrigeration, heat frost prevention method and air-conditioning system
Technical field
The present invention relates to air-conditioning manufacturing technology field, more particularly, it relates to a kind of air-conditioning system and refrigeration store Liquid method, heat storage liquid method, refrigeration frost prevention method and heat frost prevention method.
Background technology
In prior art, generally irrigating a certain amount of refrigerant in air-conditioning, this quantitative refrigerant is all in air-conditioning system System circulate realize refrigeration or heat.But, air-conditioning is during actual motion, and its load of machinery systems is not With, required coolant quantity also differs.When air-conditioning underrun, it is not required to a lot of refrigerant, Cause the waste of coolant quantity.And, when air-conditioning is in underrun, the evaporating temperature of evaporimeter is relatively Low, easily occur that refrigerant evaporation not exclusively and with liquid or gas-liquid mixed state enters compressor, thus cause Band hydraulic compression, affects the reliability operation of compressor.
It addition, air-conditioning is when carrying out cooling and warming, often there is the phenomenon of frosting, prior art in heat exchanger In, need when carrying out defrost stopping to carry out cooling and warming process, then carry out defrost, the most then have impact on system Cold heating effect, extends the cooling and warming time accordingly.
In sum, how to realize adjusting the coolant quantity of circulation in air-conditioning system by the load condition of air-conditioning, be Those skilled in the art's urgent problem at present.
Summary of the invention
In view of this, first purpose of the present invention is to provide a kind of air-conditioning system, the knot of this air-conditioning system Structure design can be effectively realized and adjust the coolant quantity of circulation in air-conditioning system by the load condition of air-conditioning, this The bright refrigeration additionally provided for above-mentioned air-conditioning system stores liquid method, heats storage liquid method, refrigeration frost prevention side Method and heat frost prevention method.
In order to reach above-mentioned first purpose, the present invention provides following technical scheme:
A kind of air-conditioning system, including:
Indoor heat exchanger；
Outdoor heat exchanger；
Connect the first pipeline of described indoor heat exchanger and described outdoor heat exchanger；
It is connected in series with the expansion valve on described first pipeline；
Compressor for compression refrigerant steam；
It is connected with the input of described compressor and output, described indoor heat exchanger and described outdoor heat exchanger Cross valve；Also include:
It is wrapped in the phase change heat accumulator on described compressor outer wall, and described phase change heat accumulator has first and crosses liquid Mouth and second crosses liquid mouth；
One end is connected to first between the described expansion valve on described first pipeline and described outdoor heat exchanger Storing liquid pipeline, the described first storage liquid pipeline other end is connected to described first and crosses liquid mouth, and described first stores liquid The first two-port valve it is serially connected with on pipeline；
The described expansion valve that one end is connected on described first pipeline by triple valve and described indoor heat exchanger Between the second storage liquid pipeline, described second stores the liquid pipeline other end is connected to described second and crosses liquid mouth, and institute State and on the second storage liquid pipeline, be additionally provided with the pressure sensor of pressure in measuring described phase change heat accumulator.
Preferably, the bypass line that one end connects, described bypass pipe are also included with the output of described compressor The other end on road is connected between the described expansion valve on described first pipeline and described outdoor heat exchanger, and institute State and on bypass line, be serially connected with the second two-port valve and the throttle capillary tube for reducing pressure by regulating flow.
A kind of refrigeration for air-conditioning system described above stores liquid method, it is characterised in that include step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the first low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop Enter phase change heat accumulator；
C: stop storing liquid.
Preferably, described step B also includes:
Switch to the input of compressor be connected if it is not, then control cross valve with indoor heat exchanger, compressor Output is connected with outdoor heat exchanger, and the first two-port valve cuts out, and control triple valve changes to expansion valve with indoor The connection of hot device and expansion valve and indoor heat exchanger are all crossed liquid mouth with second and are not connected to.
Preferably, described step C particularly as follows:
C1: when the numerical value of pressure sensor reaches N1During KPa, record aperture P of current expansion valve0After, The aperture of expansion valve is down to P1And control triple valve to expansion valve be connected with indoor heat exchanger and expansion valve with Second crosses liquid mouth is not connected to, and indoor heat exchanger and second is crossed liquid mouth and is not connected to, and maintains t1After s；
C2: controlling the first two-port valve and close, the aperture of expansion valve is recovered to P0。
Preferably, further comprise the steps of: after described step C
D: whether detection air-conditioning system is in non-first low load condition, if then carrying out tapping, i.e. controls First two-port valve cuts out, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid crossed by expansion valve and second Mouthful being not connected to, indoor heat exchanger crosses the connection of liquid mouth with second, refrigerant from phase change heat accumulator through the second accumulation of heat loop Enter indoor heat exchanger；
E: when the numerical value of pressure sensor reaches N2During KPa, record aperture P of current expansion valve2After, The aperture of expansion valve is down to minimum and maintains t2After s, control triple valve to expansion valve with indoor heat exchanger even Connecing and expansion valve and second is crossed liquid mouth and is not connected to, indoor heat exchanger and second is crossed liquid mouth and is not connected to, by expansion valve Aperture recover to P2。
Preferably, maintenance current state X is further comprised the steps of: between step C and D1min。
Preferably, step F is also included after step E step: maintain current state X1min。
Preferably, described first low load condition is specially when indoor temperature is less than A1DEG C and outdoor temperature low In B1DEG C, or the difference of indoor temperature and design temperature is less than C1DEG C and the running frequency of compressor be less than D1HZTime.
Preferably, during carrying out storing liquid or tapping, do not carry out the detection of air-conditioning system load condition.
A kind of for air-conditioning system described above heat storage liquid method, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the second low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop Enter phase change heat accumulator；
C: stop storing liquid.
Preferably, described step b also includes:
Switch to the input of compressor be connected if it is not, then control cross valve with outdoor heat exchanger, compressor Output is connected with indoor heat exchanger, and the first two-port valve cuts out, and control triple valve changes to expansion valve with indoor The connection of hot device and expansion valve and indoor heat exchanger are all crossed liquid mouth with second and are not connected to.
Preferably, described step c particularly as follows:
C1: when the numerical value of pressure sensor reaches N3During KPa, record aperture P of current expansion valve3After, The aperture of expansion valve is down to P4And control the first two-port valve closedown, and maintain t3s；
C2: control triple valve to expansion valve is connected with indoor heat exchanger and expansion valve and second is crossed liquid mouth and do not connected Connecing, indoor heat exchanger and second is crossed liquid mouth and is not connected to, and recovers the aperture of expansion valve to P3。
Preferably, further comprise the steps of: after described step c
D: whether detection air-conditioning system is in non-second low load condition, if then carrying out tapping, i.e. controls First two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid crossed by expansion valve and second Mouth is not connected to, and indoor heat exchanger and second is crossed liquid mouth and is not connected to, and refrigerant returns through the first accumulation of heat from phase change heat accumulator Road enters outdoor heat exchanger；
E: when the numerical value of pressure sensor reaches N4During KPa, record aperture P of current expansion valve4After, will The aperture of expansion valve is down to minimum and after maintaining t4s, controls the first two-port valve and closes, by the aperture of expansion valve Recover to P4。
Preferably, maintenance current state X is further comprised the steps of: between step c and d2min。
Preferably, step f is also included after step step e: maintain current state X2min。
Preferably, described second low load condition is specially when indoor temperature is higher than A2DEG C and outdoor temperature high In B2DEG C, or the difference of indoor temperature and design temperature is less than C2DEG C time.
Preferably, during carrying out storing liquid or tapping, do not carry out the detection of air-conditioning system load condition.
A kind of refrigeration frost prevention method for air-conditioning system described above, including step:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in first and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through second and enters indoor heat exchanger；
S3: when the temperature of indoor heat exchanger is higher than A3DEG C or the continuous X of temperature of indoor heat exchanger3Min is not Less than A4DEG C time, stop frost prevention, i.e. control first two-port valve close, control triple valve to expansion valve and room Interior heat exchanger connects and expansion valve and second is crossed liquid mouth and is not connected to, and indoor heat exchanger and second is crossed liquid mouth and do not connected Connect.
Preferably, described first need frost prevention state particularly as follows: the continuous X4min of the temperature of indoor heat exchanger not More than A5 DEG C, every X5The temperature of a min temperature of record and rear record is less than the former, or indoor are changed The temperature of hot device is not more than A6DEG C and X5In the min time period, temperature decreases beyond A7℃。
Preferably, step S2 also includes: close if it is not, then control the first two-port valve, control triple valve It is connected with indoor heat exchanger to expansion valve and expansion valve and second is crossed liquid mouth and is not connected to, indoor heat exchanger and second Cross liquid mouth to be not connected to.
A kind of heat frost prevention method, including step for air-conditioning system described above:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in second and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through first and enters outdoor heat exchanger；
S3: when the temperature of outdoor heat exchanger is higher than A8DEG C or the continuous X of temperature of indoor heat exchanger6Min is not Less than A9DEG C time, stop frost prevention, i.e. control first two-port valve close, control triple valve to expansion valve and room Interior heat exchanger connects and expansion valve and second is crossed liquid mouth and is not connected to, and indoor heat exchanger and second is crossed liquid mouth and do not connected Connect.
Preferably, described second frost prevention state is needed particularly as follows: the continuous X of the temperature of outdoor heat exchanger7Min is little In A10DEG C, every X8The temperature of a min temperature of record and rear record is less than the former, or indoor heat exchange The temperature of device is not more than A11DEG C and X9In the min time period, temperature decreases beyond A12℃。
Preferably, step s2 also includes: close if it is not, then control the first two-port valve, control triple valve It is connected with indoor heat exchanger to expansion valve and expansion valve and second is crossed liquid mouth and is not connected to, indoor heat exchanger and second Cross liquid mouth to be not connected to.
The air-conditioning system that the present invention provides, including indoor heat exchanger, outdoor heat exchanger, connection indoor heat exchanger With the first pipeline of outdoor heat exchanger, the expansion valve being connected in series with on the first pipeline, for compression refrigerant steam Compressor and the four-way being connected with input and output, indoor heat exchanger and the outdoor heat exchanger of compressor Valve；Also include that phase change heat accumulator, the first storage liquid pipeline and second store liquid pipeline, wherein phase change heat accumulator parcel On compressor outer wall, and phase change heat accumulator has the first liquid mouth and second excessively and crosses liquid mouth.First stores liquid pipe One end, road is connected between the expansion valve on the first pipeline and outdoor heat exchanger, and the other end is connected to first and crosses liquid Mouthful, and it is serially connected with the first two-port valve on the first storage liquid pipeline.Second stores liquid pipeline one end by triple valve even Being connected between the expansion valve on the first pipeline and indoor heat exchanger, the other end is connected to second and crosses liquid mouth, and It is additionally provided with the pressure sensor of pressure in measuring phase change heat accumulator on second storage liquid pipeline.
During the air-conditioning system that the application present invention provides, when air-conditioning system is in low load condition operation, permissible First two-port valve is opened, and controls triple valve and be connected and expansion valve and with indoor heat exchanger to expansion valve Two cross liquid mouth is not connected to, and indoor heat exchanger and second is crossed liquid mouth and connected, and now the pressure in phase change heat accumulator is little Pressure in the first pipeline so that refrigerant stores liquid loop and second through first and stores liquid loop entrance phase-transition heat-storage Device, carries out storing liquid, i.e. during air-conditioning underrun, is stored in phase change heat accumulator by a part of refrigerant, keeps away Exempt from refrigerant evaporation and not exclusively affected the reliability operation of compressor, it is achieved that adjusted according to the load condition of air-conditioning The coolant quantity of circulation in whole air-conditioning system.Wherein low load condition includes first when air-conditioning is in refrigerating state Low load condition and air-conditioning are in the second low load condition when heating state.
Present invention also offers a kind of refrigeration for air-conditioning system described above and store liquid method, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the first low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop Enter phase change heat accumulator；
C: stop storing liquid.
The refrigeration that this invention provides stores in liquid method, and after starting air-conditioning system, if detecting, air-conditioning system is in First low load condition, then control the first two-port valve and open, and controls triple valve to expansion valve and indoor heat exchanger Connecting and expansion valve and second is crossed liquid mouth and is not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, now phase transformation Pressure in storage heater is less than the pressure in the first pipeline so that refrigerant stores liquid loop and second through first and stores liquid Loop enters phase change heat accumulator, carries out storing liquid, is stored in phase change heat accumulator by a part of refrigerant, it is to avoid Refrigerant evaporation not exclusively affects the reliability operation of compressor, it is achieved that adjust sky according to the load condition of air-conditioning The coolant quantity of circulation in adjusting system.
Present invention also offers a kind of for air-conditioning system described above heat storage liquid method, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the second low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop Enter phase change heat accumulator；
C: stop storing liquid.
What this invention provided heats in storage liquid method, and after starting air-conditioning system, if detecting, air-conditioning system is in Second low load condition, then control the first two-port valve and open, and controls triple valve to expansion valve and indoor heat exchanger Connecting and expansion valve and second is crossed liquid mouth and is not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, now phase transformation Pressure in storage heater is less than the pressure in the first pipeline so that refrigerant stores liquid loop and second through first and stores liquid Loop enters phase change heat accumulator, carries out storing liquid, is stored in phase change heat accumulator by a part of refrigerant, it is to avoid Refrigerant evaporation not exclusively affects the reliability operation of compressor, it is achieved that adjust sky according to the load condition of air-conditioning The coolant quantity of circulation in adjusting system.
Present invention also offers a kind of refrigeration frost prevention method for air-conditioning system described above, including step:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in first and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through second and enters indoor heat exchanger；
S3: when the temperature of indoor heat exchanger is higher than A3DEG C or the continuous X of temperature of indoor heat exchanger3Min is not Less than A4DEG C time, stop frost prevention, i.e. control first two-port valve close, control triple valve to expansion valve and room Interior heat exchanger connects and expansion valve and second is crossed liquid mouth and is not connected to, and indoor heat exchanger and second is crossed liquid mouth and do not connected Connect.
In the refrigeration frost prevention method that this invention provides, after starting air-conditioning system, if detecting, air-conditioning system is in First needs frost prevention state, then control the first two-port valve and open, and controls triple valve to expansion valve and indoor heat exchanger Connect and expansion valve is crossed liquid mouth with second and is not connected to, indoor heat exchanger and the second mistake liquid mouth connection, now first Refrigerant in pipeline enters phase change heat accumulator through the first accumulation of heat pipeline, and promotes phase change heat accumulator to absorb after heat Refrigerant through second store liquid loop enter indoor heat exchanger, owing to phase change heat accumulator is wrapped in the outer wall of compressor On, and the temperature of compressor is higher, absorbs energy and evaporating temperature carries after therefore refrigerant enters phase change heat accumulator Height, absorbs the refrigerant after energy and stores liquid loop entrance indoor heat exchanger through second, and evaporating temperature improves, accordingly Indoor heat exchanger temperature raise, it is achieved frost prevention.Further, it is higher than when the temperature of indoor heat exchanger A3DEG C or the continuous X of temperature of indoor heat exchanger3Min is not less than A4DEG C time, stop frost prevention, i.e. control the One two-port valve cuts out, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is not connected to.
Present invention also offers and a kind of heat frost prevention method, including step for air-conditioning system described above:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in second and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve is opened, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through first and enters outdoor heat exchanger；
S3: when the temperature of outdoor heat exchanger is higher than A8DEG C or the continuous X of temperature of indoor heat exchanger6Min is not Less than A9DEG C time, stop frost prevention, i.e. control first two-port valve close, control triple valve to expansion valve and room Interior heat exchanger connects and expansion valve and second is crossed liquid mouth and is not connected to, and indoor heat exchanger and second is crossed liquid mouth and do not connected Connect.
What this invention provided heats in frost prevention method, and after starting air-conditioning system, if detecting, air-conditioning system is in Second needs frost prevention state, then control the first two-port valve and open, and controls triple valve to expansion valve and indoor heat exchanger Connect and expansion valve is crossed liquid mouth with second and is not connected to, indoor heat exchanger and the second mistake liquid mouth connection, now first Refrigerant in pipeline enters phase change heat accumulator through the second accumulation of heat loop, and promotes phase change heat accumulator to absorb after heat Refrigerant through first store liquid loop enter outdoor heat exchanger, owing to phase change heat accumulator is wrapped in the outer wall of compressor On, and the temperature of compressor is higher, absorbs energy and evaporating temperature carries after therefore refrigerant enters phase change heat accumulator Height, absorbs the refrigerant after energy and stores liquid loop entrance outdoor heat exchanger through second, and evaporating temperature improves, accordingly Outdoor heat exchanger temperature raise, it is achieved frost prevention.Further, it is higher than when the temperature of outdoor heat exchanger A3DEG C or the continuous X of temperature of outdoor heat exchanger3Min is not less than A4DEG C time, stop frost prevention, i.e. control the One two-port valve cuts out, and control triple valve to expansion valve is connected with indoor heat exchanger and liquid mouth crossed by expansion valve and second Being not connected to, indoor heat exchanger and second is crossed liquid mouth and is not connected to.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below In accompanying drawing be only some embodiments of the present invention, for those of ordinary skill in the art, do not paying On the premise of going out creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the air-conditioning system that Fig. 1 provides for the embodiment of the present invention；
The structural representation of the air-conditioning system of the first embodiment that Fig. 2 provides for the embodiment of the present invention；
Fig. 3 stores the flow chart of liquid method for the refrigeration that the embodiment of the present invention provides；
The structural representation of the air-conditioning system of the second embodiment that Fig. 4 provides for the embodiment of the present invention；
The flow chart heating storage liquid method that Fig. 5 provides for the embodiment of the present invention；
The structural representation of the air-conditioning system of the third embodiment that Fig. 6 provides for the embodiment of the present invention；
The flow chart of the refrigeration frost prevention method that Fig. 7 provides for the embodiment of the present invention；
The structural representation of the air-conditioning system of the 4th kind of embodiment that Fig. 8 provides for the embodiment of the present invention；
The flow chart heating frost prevention method that Fig. 9 provides for the embodiment of the present invention；
Accompanying drawing marks as follows:
1-the second two-port valve, 2-cross valve, 3-throttle capillary tube, 4-outdoor heat exchanger, 5-outdoor fan, 6-expansion valve, 7-the first two-port valve, 8-triple valve, 9-pressure sensor, 10-indoor fan, 11-indoor are changed Hot device, 12-phase change heat accumulator, 13-compressor.
Detailed description of the invention
First purpose of the present invention is to provide a kind of air-conditioning system, and the structure design of this air-conditioning system is permissible It is effectively realized and adjusts the coolant quantity of circulation in air-conditioning system by the load condition of air-conditioning, present invention also offers Refrigeration for above-mentioned air-conditioning system stores liquid method, heats storage liquid method, refrigeration frost prevention method and heat Frost prevention method.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Refer to Fig. 1, the air-conditioning system that the embodiment of the present invention provides, change including indoor heat exchanger 11, outdoor Hot device 4, connect the first pipeline of indoor heat exchanger 11 and outdoor heat exchanger 4, be connected in series with on the first pipeline Expansion valve 6, for compression refrigerant steam compressor 13 and with the input of compressor 13 and output The cross valve 2 that end, indoor heat exchanger 11 and outdoor heat exchanger 4 connect；Also include phase change heat accumulator 12, First stores liquid pipeline and second stores liquid pipeline, and wherein phase change heat accumulator 12 is wrapped on compressor 13 outer wall, And phase change heat accumulator 12 has the first liquid mouth and second excessively and crosses liquid mouth.First stores liquid pipeline one end is connected to Between expansion valve 6 and outdoor heat exchanger 4 on first pipeline, the other end is connected to first and crosses liquid mouth, and It is serially connected with the first two-port valve 7 on first storage liquid pipeline.Second stores liquid pipeline one end is connected to by triple valve 8 Between expansion valve 6 and indoor heat exchanger 11 on first pipeline, the other end is connected to second and crosses liquid mouth, and And second store the pressure sensor 9 being additionally provided with pressure in measuring phase change heat accumulator 12 on liquid pipeline.
During the air-conditioning system that the application embodiment of the present invention provides, run when air-conditioning system is in low load condition Time, the first two-port valve 7 can be opened, and control triple valve 8 to expansion valve 6 with indoor heat exchanger 11 even Connecing and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 is crossed liquid mouth with second and is connected, this phase Become the pressure in storage heater 12 less than the pressure in the first pipeline so that refrigerant stores liquid loop and second through first Store liquid loop and enter phase change heat accumulator 12, carry out storing liquid, i.e. during air-conditioning underrun, by a part of refrigerant It is stored in phase change heat accumulator 12, it is to avoid refrigerant evaporation not exclusively affects the reliability operation of compressor 13, Achieve and adjust the coolant quantity of circulation in air-conditioning system according to the load condition of air-conditioning.Wherein low load condition bag Include the first low load condition when air-conditioning is in refrigerating state and air-conditioning to be in second when heating state low negative Lotus state.
Furthermore it is also possible to the air-conditioning system utilizing the embodiment of the present invention to provide carries out frost prevention, at air-conditioning system In time needing frost prevention state, part refrigerant can be made to enter back into the first pipe after phase change heat accumulator 12 absorbs energy Road, improves evaporating temperature, it is achieved frost prevention.First needs frost prevention state and second to need wherein to need frost prevention state to include Frost prevention state.
In order to optimize technique scheme further, it is also possible to include that one end connects with the output of compressor 13 Logical bypass line, expansion valve 6 that the other end of bypass line is connected on the first pipeline and outdoor heat exchanger Between 4, and on bypass line, it is serially connected with the second two-port valve 1 and the throttle capillary tube 3 for reducing pressure by regulating flow. Being arranged such, the refrigerant of HTHP is through bypass line, such that it is able to add outdoor heat exchanger 4 Heat.
Wherein, compressor 13 can be compound compressor.Phase change heat accumulator 12 can include being wrapped in compression Dip mold seat on machine 13 outer wall, the storage heater housing being arranged in dip mold seat, and at storage heater shell Body is filled with heat-storing material, heat-storing material is provided with heat exchange copper tube, also include for fixing heat exchange copper The top die lid of pipe.Wherein, heat exchange copper tube can carry out storing refrigerant.Expansion valve 6 can be electronic expansion Valve.It addition, also set up outdoor fan 5 at outdoor heat exchanger 4, go out to set at indoor heat exchanger 11 simultaneously It is equipped with indoor fan 10.
Referring to Fig. 2 and Fig. 3, the embodiment of the present invention additionally provides a kind of for air-conditioning system described above Refrigeration stores liquid method, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the first low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve 7 is opened, and controls triple valve 8 to expansion valve 6 and is connected with indoor heat exchanger 11 and expansion valve 6 Crossing liquid mouth with second to be not connected to, indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant stores liquid through first and returns Road and second stores liquid loop and enters phase change heat accumulator 12；
C: stop storing liquid.
The refrigeration that this inventive embodiments provides stores in liquid method, after starting air-conditioning system, if air-conditioning system being detected System is in the first low load condition, then control the first two-port valve 7 and open, and controls triple valve 8 to expansion valve 6 It is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 and second Crossing liquid mouth to connect, now the pressure in phase change heat accumulator 12 is less than the pressure in the first pipeline so that refrigerant Store liquid loop and second through first and store liquid loop entrance phase change heat accumulator 12, carry out storing liquid, by a part of cold Matchmaker is stored in phase change heat accumulator 12, it is to avoid refrigerant evaporation not exclusively affects the reliability fortune of compressor 13 OK, it is achieved that adjust the coolant quantity of circulation in air-conditioning system according to the load condition of air-conditioning.
In order to optimize technique scheme further, above-mentioned steps B is specifically as follows: detection air-conditioning system Whether it is in the first low load condition, if then carrying out storing liquid, i.e. controlling the first two-port valve 7 and opening, controlling Triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, Indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant stores liquid loop and second through first and stores the entrance of liquid loop Phase change heat accumulator 12；If it is not, then control cross valve 2 to switch to the input of compressor 13 and indoor heat exchange Device 11 connects, and the output of compressor 13 is connected with outdoor heat exchanger 4, and the first two-port valve 7 cuts out, and Control triple valve 8 to expansion valve 6 be connected with indoor heat exchanger 11 and expansion valve 6 and indoor heat exchanger 11 equal Cross liquid mouth with second to be not connected to.I.e. carry out when air-conditioning system is in the first low load condition storing liquid, work as air-conditioning When system is not on the first low load condition, then air-conditioning system normally works.
In above-mentioned steps C, C can be specifically included1: when the numerical value of pressure sensor 9 reaches N1During KPa, Record aperture P of current expansion valve 60After, the aperture of expansion valve 6 is down to P1And control triple valve 8 to Expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 cross liquid mouth with second is not connected to, and maintains t1After s；
C2: controlling the first two-port valve 7 and close, the aperture of expansion valve is recovered to P0。
I.e. reach N when the numerical value of pressure sensor 91During KPa, close the second storage liquid loop, make refrigerant only Store liquid loop by first and enter phase change heat accumulator 12, make the aperture of expansion valve 6 be down to P simultaneously1, so that Obtain more refrigerant and store liquid loop entrance phase change heat accumulator 12 through first, maintain t1After s, then by controlling the One two-port valve 7 cuts out and then cuts out the first storage liquid loop, thus realizes stopping storing liquid.
Certainly, after step C can also be specifically, set the time period, triple valve 8 to expansion valve 6 is controlled with indoor Heat exchanger 11 connects and expansion valve 6 is crossed liquid mouth with second and is not connected to, and indoor heat exchanger 11 and second crosses liquid mouth not Connect, control the first two-port valve 7 simultaneously and close, i.e. simultaneously close off the first storage liquid loop and second and store liquid loop, In this no limit.
In the present embodiment, step can also be included after above-mentioned steps C:
D: whether detection air-conditioning system is in non-first low load condition, if then carrying out tapping, i.e. controls First two-port valve 7 cuts out, and controls triple valve 8 to expansion valve 6 and is connected and expansion valve with indoor heat exchanger 11 6 cross liquid mouth with second is not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant is from phase-transition heat-storage Device 12 enters indoor heat exchanger 11 through the second accumulation of heat loop；
By controlling triple valve 8 to expansion valve 6 and be connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake Liquid mouth is not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and now the pressure of phase change heat accumulator 12 is big Pressure in the first pipeline so that refrigerant changes through the second entrance indoor, accumulation of heat loop from phase change heat accumulator 12 Hot device 11, it is achieved tapping.
E: when the numerical value of pressure sensor 9 reaches N2During KPa, record aperture P of current expansion valve 62 After, the aperture of expansion valve 6 is down to minimum and maintains t2After s, control triple valve 8 to expansion valve 6 and room Interior heat exchanger 11 connects and expansion valve 6 is crossed liquid mouth with second and is not connected to, and indoor heat exchanger 11 and second crosses liquid Mouth is not connected to, and recovers the aperture of expansion valve 6 to P2。
By the aperture of expansion valve 6 being down to the minimum pressure made between the first pipeline and the second storage liquid loop Power difference strengthens, and advantageously the refrigerant in phase change heat accumulator 12 flows back to indoor heat exchange through the second storage liquid loop Device 11.
Preferably, maintenance current state X is further comprised the steps of: between step C and D1min.Such then protect Hold air-conditioning system and run X1After min, then carry out the detection of air-conditioning system running status.
Same, also include step F after step E step: maintain current state X1min.I.e. X1min Carry out detecting the load condition of air-conditioning system the most again.
It addition, the first low load condition is specially when indoor temperature is less than A1DEG C and outdoor temperature less than B1DEG C, Or indoor temperature is less than C with the difference of design temperature1DEG C and the running frequency of compressor 13 less than D1HZ Time.
By arranging temperature-detecting device detection indoor temperature, when indoor temperature temperature is less than A1DEG C and outdoor Temperature is less than B1DEG C, or the difference of indoor temperature and design temperature is less than C1DEG C and the operation of compressor 13 Frequency is less than D1HZTime, control air-conditioning system and enter storage liquid step.
Certain first low load condition can also be that only indoor temperature is less than a certain temperature, and this temperature can basis Various Seasonal specifically sets.
It should be noted that do not carry out the inspection of air-conditioning system load condition during carrying out storing liquid or tapping Survey.
Referring to Fig. 4 and Fig. 5, the embodiment of the present invention additionally provides a kind of for air-conditioning system described above Heat storage liquid method, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the second low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve 7 is opened, and controls triple valve 8 to expansion valve 6 and is connected with indoor heat exchanger 11 and expansion valve 6 Crossing liquid mouth with second to be not connected to, indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant stores liquid through first and returns Road and second stores liquid loop and enters phase change heat accumulator 12；
C: stop storing liquid.
What this inventive embodiments provided heats in storage liquid method, after starting air-conditioning system, if air-conditioning system being detected System is in the second low load condition, then control the first two-port valve 7 and open, and controls triple valve 8 to expansion valve 6 It is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 and second Crossing liquid mouth to connect, now the pressure in phase change heat accumulator 12 is less than the pressure in the first pipeline so that refrigerant Store liquid loop and second through first and store liquid loop entrance phase change heat accumulator 12, carry out storing liquid, by a part of cold Matchmaker is stored in phase change heat accumulator 12, it is to avoid refrigerant evaporation not exclusively affects the reliability fortune of compressor 13 OK, it is achieved that adjust the coolant quantity of circulation in air-conditioning system according to the load condition of air-conditioning.
In order to optimize technique scheme further, above-mentioned steps b is specifically as follows: detection air-conditioning system is No it is in the second low load condition, if then carrying out storing liquid, i.e. controlling the first two-port valve 7 and opening, controlling three Logical valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, room Interior heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop entrance phase Become storage heater 12；If it is not, then control cross valve 2 to switch to input and the outdoor heat exchanger of compressor 13 4 connect, and the output of compressor 13 is connected with indoor heat exchanger 11, and the first two-port valve 7 cuts out, and control Triple valve 8 to expansion valve 6 processed be connected with indoor heat exchanger 11 and expansion valve 6 and indoor heat exchanger 11 all with Second crosses liquid mouth is not connected to.I.e. carry out when air-conditioning system is in the second low load condition storing liquid, when air-conditioning system When system is not on the second low load condition, then air-conditioning system normally works.
In above-mentioned steps c, c1 can be specifically included: when the numerical value of pressure sensor 9 reaches N3During KPa, Record aperture P of current expansion valve 63After, the aperture of expansion valve 6 is down to P4And control the first two-port valve 7 close, and maintain t3s；
C2: control triple valve 8 to expansion valve 6 and be connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake Liquid mouth is not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and is not connected to, and recovers the aperture of expansion valve to P3。
I.e. reach N when the numerical value of pressure sensor 93During KPa, close the first storage liquid loop, make refrigerant only Store liquid loop by second and enter phase change heat accumulator 12, and make the aperture of expansion valve 6 be down to P4, so that more Many refrigerants store liquid loop through second and enter phase change heat accumulator 12, maintain t3After s, then by controlling triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, and indoor are changed Hot device 11 and the second liquid mouth excessively are not connected to and then close the second storage liquid loop, thus realize stopping storing liquid.
Certainly, after step c can also be specifically, set the time period, control triple valve 8 to expansion valve and change with indoor Hot device 11 connects and expansion valve 6 is crossed liquid mouth with second and is not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and do not connected Connect, control the first two-port valve 7 simultaneously and close, i.e. simultaneously close off the first storage liquid loop and second and store liquid loop, In this no limit.
In the present embodiment, step can also be included after above-mentioned steps c:
D: whether detection air-conditioning system is in non-second low load condition, if then carrying out tapping, i.e. controls First two-port valve 7 is opened, and controls triple valve 8 to expansion valve 6 and is connected and expansion valve with indoor heat exchanger 11 6 cross liquid mouth with second is not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and is not connected to, and refrigerant stores from phase transformation Hot device 12 enters outdoor heat exchanger 4 through the first accumulation of heat loop；
By controlling triple valve 8 to expansion valve 6 and be connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake Liquid mouth is not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and is not connected to, and controls the first two-port valve 7 dozens simultaneously Opening, now the pressure of phase change heat accumulator 12 is more than the pressure in the first pipeline so that refrigerant is from phase-transition heat-storage Device 12 enters outdoor heat exchanger 4 through the first accumulation of heat loop, it is achieved tapping.
E: when the numerical value of pressure sensor 9 reaches N4During KPa, record aperture P of current expansion valve 64 After, the aperture of expansion valve 6 is down to minimum and maintains t4After s, control the first two-port valve 7 and close, by swollen The aperture of swollen valve 6 is recovered to P4。
By the aperture of expansion valve 6 being down to the minimum pressure made between the first pipeline and the first storage liquid loop Power difference strengthens, and advantageously the refrigerant in phase change heat accumulator 12 flows back to outdoor heat exchange through the first storage liquid loop Device 4.
Preferably, maintenance current state X is further comprised the steps of: between step c and d2min.Such then keep Air-conditioning system runs X2After min, then carry out the detection of air-conditioning system running status.
Same, also include step f after step step e: maintain current state X2min.I.e. X2min Carry out detecting the load condition of air-conditioning system the most again.
It addition, the second low load condition is specially when indoor temperature is higher than A2DEG C and outdoor temperature higher than B2DEG C, Or indoor temperature is less than C with the difference of design temperature2DEG C time.
By arranging temperature-detecting device detection indoor temperature, when indoor temperature temperature is higher than A2DEG C and outdoor Temperature is higher than B2DEG C, or the difference of indoor temperature and design temperature is less than C2DEG C time, control air-conditioning system Enter and store liquid step.
Certain second low load condition can also be that only indoor temperature is higher than a certain temperature, and this temperature can basis Various Seasonal specifically sets.
It should be noted that do not carry out the inspection of air-conditioning system load condition during carrying out storing liquid or tapping Survey.
Referring to Fig. 6 and Fig. 7, the embodiment of the present invention additionally provides a kind of for air-conditioning system described above Refrigeration frost prevention method, including step:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in first and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve 7 is opened, and controls triple valve 8 to expansion valve 6 and is connected with indoor heat exchanger 11 and expansion valve 6 Crossing liquid mouth with second to be not connected to, indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant stores liquid through second and returns Road enters indoor heat exchanger 11；
S3: when the temperature of indoor heat exchanger 11 is higher than A3DEG C or the temperature of indoor heat exchanger 11 continuous X3Min is not less than A4DEG C time, stop frost prevention, i.e. control the first two-port valve 7 and close, control triple valve 8 It is connected with indoor heat exchanger 11 to expansion valve 6 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchange Device 11 is crossed liquid mouth with second and is not connected to.
In the refrigeration frost prevention method that this inventive embodiments provides, after starting air-conditioning system, if air-conditioning system being detected System is in first needs frost prevention state, then control the first two-port valve 7 and open, and controls triple valve 8 to expansion valve 6 It is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 and second Crossing liquid mouth to connect, now the refrigerant in the first pipeline enters phase change heat accumulator 12 through the first accumulation of heat pipeline, and Refrigerant after promoting phase change heat accumulator 12 to absorb heat stores liquid loop through second and enters indoor heat exchanger 11, by On the outer wall that phase change heat accumulator 12 is wrapped in compressor 13, and the temperature of compressor 13 is higher, therefore Refrigerant enters and absorbs energy after phase change heat accumulator 12 and evaporating temperature improves, and absorbs the refrigerant after energy through the Two store liquid loop enters indoor heat exchanger 11, and evaporating temperature improves, the temperature of corresponding indoor heat exchanger 11 Raise, it is achieved frost prevention.Further, when the temperature of indoor heat exchanger 11 is higher than A3DEG C or indoor heat exchange The continuous X of temperature of device 113Min is not less than A4DEG C time, stop frost prevention, i.e. control the first two-port valve 7 and close, Control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and do not connected Connecing, indoor heat exchanger 11 is crossed liquid mouth with second and is not connected to.
Wherein, first frost prevention state is needed particularly as follows: the continuous X of the temperature of indoor heat exchanger 114Min is not more than A5DEG C, and every X5The temperature of a min temperature of record and rear record is less than the former, or indoor are changed The temperature of hot device 11 is not more than A6DEG C and X5In the min time period, temperature decreases beyond A7℃。
Certainly, first frost prevention state is needed to can moreover be only the continuous X of temperature of indoor heat exchanger 114Min is not more than A5DEG C, in this no limit.
Step S2 can be particularly as follows: whether detection air-conditioning system be in first and needs frost prevention state, if then carrying out Frost prevention, i.e. controls the first two-port valve 7 and opens, and controls triple valve 8 to expansion valve 6 and is connected with indoor heat exchanger 11 And expansion valve 6 crosses liquid mouth with second and be not connected to, indoor heat exchanger 11 is connected with the second mistake liquid mouth, and refrigerant is through the Two store liquid loop enters indoor heat exchanger 11；Close if it is not, then control the first two-port valve 7, control triple valve 8 It is connected with indoor heat exchanger 11 to expansion valve 6 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 Cross liquid mouth with second to be not connected to.
I.e. when air-conditioning system be in first need frost prevention state time carry out frost prevention, when air-conditioning system is not on first When needing frost prevention state, then air-conditioning system normally works.
Referring to Fig. 8 and Fig. 9, the embodiment of the present invention additionally provides a kind of for air-conditioning system described above Heat frost prevention method, including step:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in second and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve 7 is opened, and controls triple valve 8 to expansion valve 6 and is connected with indoor heat exchanger 11 and expansion valve 6 Crossing liquid mouth with second to be not connected to, indoor heat exchanger 11 is crossed liquid mouth with second and is connected, and refrigerant stores liquid through first and returns Road enters outdoor heat exchanger 4；
S3: when the temperature of outdoor heat exchanger 4 is higher than A8DEG C or the continuous X of temperature of indoor heat exchanger 116min Not less than A9DEG C time, stop frost prevention, i.e. control the first two-port valve 7 and close, control triple valve 8 to expansion Valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 with Second crosses liquid mouth is not connected to.
What this inventive embodiments provided heats in frost prevention method, after starting air-conditioning system, if air-conditioning system being detected System is in second needs frost prevention state, then control the first two-port valve 7 and open, and controls triple valve 8 to expansion valve 6 It is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, indoor heat exchanger 11 and second Crossing liquid mouth to connect, now the refrigerant in the first pipeline enters phase change heat accumulator 12 through the second accumulation of heat loop, and Refrigerant after promoting phase change heat accumulator 12 to absorb heat stores liquid loop through first and enters outdoor heat exchanger 4, by On the outer wall that phase change heat accumulator 12 is wrapped in compressor 13, and the temperature of compressor 13 is higher, therefore Refrigerant enters and absorbs energy after phase change heat accumulator 12 and evaporating temperature improves, and absorbs the refrigerant after energy through the Two store liquid loop enters outdoor heat exchanger 4, and evaporating temperature improves, the temperature liter of corresponding outdoor heat exchanger 4 High, it is achieved frost prevention.Further, when the temperature of outdoor heat exchanger 4 is higher than A3 DEG C or outdoor heat exchanger The continuous X of temperature of 43Min is not less than A4DEG C time, stop frost prevention, i.e. control the first two-port valve 7 and close, Control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and do not connected Connecing, indoor heat exchanger 11 is crossed liquid mouth with second and is not connected to.
Wherein, second frost prevention state is needed particularly as follows: the continuous X of the temperature of outdoor heat exchanger 47Min is not more than A10DEG C, and every X8The temperature of a min temperature of record and rear record is less than the former, or indoor are changed The temperature of hot device 11 is not more than A11DEG C and X9In the min time period, temperature decreases beyond A12℃。
Certainly, second to need frost prevention state to can moreover be only the continuous X7min of temperature of outdoor heat exchanger 4 little In A10DEG C situation, in this no limit.
Step s2 can be particularly as follows: whether detection air-conditioning system be in second and needs frost prevention state, if then entering Row frost prevention, i.e. controls the first two-port valve 7 and opens, and controls triple valve 8 to expansion valve 6 and indoor heat exchanger 11 connections and expansion valve 6 are crossed liquid mouth with second and are not connected to, and indoor heat exchanger 11 is crossed liquid mouth with second and is connected, Refrigerant stores liquid loop through first and enters outdoor heat exchanger 4；Close if it is not, then control the first two-port valve 7, control Triple valve 8 to expansion valve 6 processed is connected with indoor heat exchanger 11 and expansion valve 6 is crossed liquid mouth with second and is not connected to, Indoor heat exchanger 11 is crossed liquid mouth with second and is not connected to.
I.e. when air-conditioning system be in second need frost prevention state time carry out frost prevention, when air-conditioning system is not on second When needing frost prevention state, then air-conditioning system normally works.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is With the difference of other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this Invention.Multiple amendment to these embodiments will be apparent for those skilled in the art , generic principles defined herein can without departing from the spirit or scope of the present invention, Other embodiments realizes.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and It is to fit to the widest scope consistent with principles disclosed herein and features of novelty.

Claims (19)

1. the refrigeration of air-conditioning system stores a liquid method, and air-conditioning system includes:
Indoor heat exchanger (11)；
Outdoor heat exchanger (4)；
Connect the first pipeline of described indoor heat exchanger (11) and described outdoor heat exchanger (4)；
The expansion valve (6) being connected in series with on described first pipeline；
Compressor (13) for compression refrigerant steam；
Input and output, described indoor heat exchanger (11) and described room with described compressor (13) The cross valve (2) that external heat exchanger (4) connects；It is characterized in that, also include:
The phase change heat accumulator (12) being wrapped on described compressor (13) outer wall, and described phase change heat accumulator (12) there is the first liquid mouth and second excessively and cross liquid mouth；
The described expansion valve (6) that one end is connected on described first pipeline and described outdoor heat exchanger (4) it Between the first storage liquid pipeline, described first stores the liquid pipeline other end is connected to described first and crosses liquid mouth, and described It is serially connected with the first two-port valve (7) on first storage liquid pipeline；
The described expansion valve (6) that one end is connected on described first pipeline by triple valve (8) and described room The second storage liquid pipeline between interior heat exchanger (11), described second stores the liquid pipeline other end is connected to described the It is additionally provided with in measuring described phase change heat accumulator (12) on two mistake liquid mouths, and described second storage liquid pipeline The pressure sensor (9) of pressure；
It is characterized in that, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the first low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve (7) is opened, and controls triple valve (8) to expansion valve (6) with indoor heat exchanger (11) even Connecing and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor heat exchanger (11) is crossed liquid mouth with second and is connected, Refrigerant stores liquid loop and second through first and stores liquid loop entrance phase change heat accumulator (12)；
C: stop storing liquid；It is specially C1: when the numerical value of pressure sensor (9) reaches N1During KPa, note Record aperture P of current expansion valve (6)0After, the aperture of expansion valve (6) is down to P1And control triple valve (8) it is connected with indoor heat exchanger (11) to expansion valve (6) and expansion valve (6) crosses liquid mouth not with second Connecting, indoor heat exchanger (11) is crossed liquid mouth with second and is not connected to, and maintains t1After s；
C2: controlling the first two-port valve (7) and close, the aperture of expansion valve is recovered to P0。
Refrigeration the most according to claim 1 stores liquid method, it is characterised in that also include one end and institute Stating the bypass line of the output connection of compressor (13), the other end of described bypass line is connected to described Between described expansion valve (6) and described outdoor heat exchanger (4) on first pipeline, and described bypass line On be serially connected with the second two-port valve (1) and for the throttle capillary tube (3) of reducing pressure by regulating flow.
Refrigeration the most according to claim 1 stores liquid method, it is characterised in that in described step B also Including:
If it is not, then control cross valve (2) to switch to input and the indoor heat exchanger (11) of compressor (13) Connecting, the output of compressor (13) is connected with outdoor heat exchanger (4), and the first two-port valve (7) cuts out, And control triple valve (8) to expansion valve (6) be connected with indoor heat exchanger (11) and expansion valve (6) and Indoor heat exchanger (11) is all crossed liquid mouth with second and is not connected to.
Refrigeration the most according to claim 1 stores liquid method, it is characterised in that after described step C Further comprise the steps of:
D: whether detection air-conditioning system is in non-first low load condition, if then carrying out tapping, i.e. controls First two-port valve (7) cuts out, and controls triple valve (8) to expansion valve (6) and indoor heat exchanger (11) Connecting and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor heat exchanger (11) crosses liquid mouth even with second Connecing, refrigerant enters indoor heat exchanger (11) from phase change heat accumulator (12) through the second accumulation of heat loop；
E: when the numerical value of pressure sensor (9) reaches N2During KPa, record opening of current expansion valve (6) Degree P2After, the aperture of expansion valve (6) is down to minimum and is maintained t2After s, control triple valve (8) to swollen Swollen valve (6) is connected with indoor heat exchanger (11) and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor Heat exchanger (11) is crossed liquid mouth with second and is not connected to, and recovers the aperture of expansion valve (6) to P2。
Refrigeration the most according to claim 4 stores liquid method, it is characterised in that between step C and D Further comprise the steps of: maintenance current state X1min。
Refrigeration the most according to claim 4 stores liquid method, it is characterised in that after step E step Also include step F: maintain current state X1min。
Refrigeration the most according to claim 1 stores liquid method, it is characterised in that described first underload State is specially when indoor temperature is less than A1DEG C and outdoor temperature less than B1DEG C, or indoor temperature and setting The difference of temperature is less than C1DEG C and the running frequency of compressor (13) less than D1HZTime.
The most according to claim 4 refrigeration store liquid method, it is characterised in that carry out store liquid or The detection of air-conditioning system load condition is not carried out during tapping.
9. heating of air-conditioning system stores a liquid method, and air-conditioning system includes:
Indoor heat exchanger (11)；
Outdoor heat exchanger (4)；
Connect the first pipeline of described indoor heat exchanger (11) and described outdoor heat exchanger (4)；
The expansion valve (6) being connected in series with on described first pipeline；
Compressor (13) for compression refrigerant steam；
Input and output, described indoor heat exchanger (11) and described room with described compressor (13) The cross valve (2) that external heat exchanger (4) connects；It is characterized in that, also include:
The phase change heat accumulator (12) being wrapped on described compressor (13) outer wall, and described phase change heat accumulator (12) there is the first liquid mouth and second excessively and cross liquid mouth；
The described expansion valve (6) that one end is connected on described first pipeline and described outdoor heat exchanger (4) it Between the first storage liquid pipeline, described first stores the liquid pipeline other end is connected to described first and crosses liquid mouth, and described It is serially connected with the first two-port valve (7) on first storage liquid pipeline；
The described expansion valve (6) that one end is connected on described first pipeline by triple valve (8) and described room The second storage liquid pipeline between interior heat exchanger (11), described second stores the liquid pipeline other end is connected to described the It is additionally provided with in measuring described phase change heat accumulator (12) on two mistake liquid mouths, and described second storage liquid pipeline The pressure sensor (9) of pressure；
It is characterized in that, including step:
A: start air-conditioning system；
B: whether detection air-conditioning system is in the second low load condition, if then carrying out storing liquid, i.e. controls the One two-port valve (7) is opened, and controls triple valve (8) to expansion valve (6) with indoor heat exchanger (11) even Connecing and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor heat exchanger (11) is crossed liquid mouth with second and is connected, Refrigerant stores liquid loop and second through first and stores liquid loop entrance phase change heat accumulator (12)；
C: stop storing liquid；It is specially c1: when the numerical value of pressure sensor (9) reaches N3During KPa, note Record aperture P of current expansion valve (6)3After, the aperture of expansion valve (6) is down to P4And control the one or two Logical valve (7) cuts out, and maintains t3s；
C2: control triple valve (8) and be connected and expansion valve (6) with indoor heat exchanger (11) to expansion valve (6) Crossing liquid mouth with second to be not connected to, indoor heat exchanger (11) is crossed liquid mouth with second and is not connected to, opening expansion valve Degree recovers to P3。
The most according to claim 9 heating stores liquid method, it is characterised in that also include one end and institute Stating the bypass line of the output connection of compressor (13), the other end of described bypass line is connected to described Between described expansion valve (6) and described outdoor heat exchanger (4) on first pipeline, and described bypass line On be serially connected with the second two-port valve (1) and for the throttle capillary tube (3) of reducing pressure by regulating flow.
11. according to claim 9 heating store liquid method, it is characterised in that in described step b also Including:
If it is not, then control cross valve (2) to switch to input and the outdoor heat exchanger (4) of compressor (13) Connecting, the output of compressor (13) is connected with indoor heat exchanger (11), and the first two-port valve (7) closes Close, and control triple valve (8) is connected and expansion valve (6) with indoor heat exchanger (11) to expansion valve (6) All cross liquid mouth with second with indoor heat exchanger (11) to be not connected to.
12. according to claim 9 heating store liquid method, it is characterised in that after described step c Further comprise the steps of:
D: whether detection air-conditioning system is in non-second low load condition, if then carrying out tapping, i.e. controls First two-port valve (7) is opened, and controls triple valve (8) to expansion valve (6) and indoor heat exchanger (11) Connecting and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor heat exchanger (11) crosses liquid mouth not with second Connecting, refrigerant enters outdoor heat exchanger (4) from phase change heat accumulator (12) through the first accumulation of heat loop；
E: when the numerical value of pressure sensor (9) reaches N4During KPa, record opening of current expansion valve (6) Degree P4After, the aperture of expansion valve (6) is down to minimum and is maintained t4After s, control the first two-port valve (7) Close, the aperture of expansion valve (6) is recovered to P4。
13. according to claim 12 heat storage liquid method, it is characterised in that step c and d it Between further comprise the steps of: maintenance current state X2min。
14. according to claim 12 heat storage liquid method, it is characterised in that step step e it After also include step f: maintain current state X2min。
15. according to claim 9 heating store liquid method, it is characterised in that described second underload State is specially when indoor temperature is higher than A2DEG C and outdoor temperature higher than B2DEG C, or indoor temperature and setting The difference of temperature is less than C2DEG C time.
16. according to claim 12 heat storage liquid method, it is characterised in that carry out store liquid or The detection of air-conditioning system load condition is not carried out during person's tapping.
17. 1 kinds of air-conditioning systems heat frost prevention method, air-conditioning system includes:
Indoor heat exchanger (11)；
Outdoor heat exchanger (4)；
Connect the first pipeline of described indoor heat exchanger (11) and described outdoor heat exchanger (4)；
The expansion valve (6) being connected in series with on described first pipeline；
Compressor (13) for compression refrigerant steam；
Input and output, described indoor heat exchanger (11) and described room with described compressor (13) The cross valve (2) that external heat exchanger (4) connects；It is characterized in that, also include:
The phase change heat accumulator (12) being wrapped on described compressor (13) outer wall, and described phase change heat accumulator (12) there is the first liquid mouth and second excessively and cross liquid mouth；
The described expansion valve (6) that one end is connected on described first pipeline and described outdoor heat exchanger (4) it Between the first storage liquid pipeline, described first stores the liquid pipeline other end is connected to described first and crosses liquid mouth, and described It is serially connected with the first two-port valve (7) on first storage liquid pipeline；
The described expansion valve (6) that one end is connected on described first pipeline by triple valve (8) and described room The second storage liquid pipeline between interior heat exchanger (11), described second stores the liquid pipeline other end is connected to described the It is additionally provided with in measuring described phase change heat accumulator (12) on two mistake liquid mouths, and described second storage liquid pipeline The pressure sensor (9) of pressure；
It is characterized in that, including step:
S1: start air-conditioning system；
S2: whether detection air-conditioning system is in second and needs frost prevention state, if then carrying out frost prevention, i.e. controls the One two-port valve (7) is opened, and controls triple valve (8) to expansion valve (6) with indoor heat exchanger (11) even Connecing and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor heat exchanger (11) is crossed liquid mouth with second and is connected, Refrigerant stores liquid loop through first and enters outdoor heat exchanger (4)；
S3: when the temperature of outdoor heat exchanger (4) is higher than A8DEG C or indoor heat exchanger (11) temperature even Continuous X6Min is not less than A9DEG C time, stop frost prevention, i.e. control the first two-port valve (7) close, control threeway Valve (8) is connected and expansion valve (6) and second liquid mouth excessively to expansion valve (6) with indoor heat exchanger (11) Being not connected to, indoor heat exchanger (11) is crossed liquid mouth with second and is not connected to；
Described second needs frost prevention state particularly as follows: the continuous X of temperature of outdoor heat exchanger (4)7Min is not more than A10DEG C, every X8The temperature of a min temperature of record and rear record is less than the former, or indoor heat exchanger (11) temperature is not more than A11DEG C and X9In the min time period, temperature decreases beyond A12℃。
18. according to claim 17 heat frost prevention method, it is characterised in that also include one end with The bypass line of the output connection of described compressor (13), the other end of described bypass line is connected to institute State between the described expansion valve (6) on the first pipeline and described outdoor heat exchanger (4), and described bypass pipe The second two-port valve (1) and the throttle capillary tube (3) for reducing pressure by regulating flow it is serially connected with on road.
19. according to claim 17 heat frost prevention method, it is characterised in that also wrap in step s2 Include: if it is not, then control the first two-port valve (7) close, control triple valve (8) to expansion valve (6) with Indoor heat exchanger (11) connects and expansion valve (6) is crossed liquid mouth with second and is not connected to, indoor heat exchanger (11) Cross liquid mouth with second to be not connected to.
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