CN104422193A - Refrigeration and heating liquid accumulation methods, refrigeration and heating frost prevention methods and air conditioning system - Google Patents

Refrigeration and heating liquid accumulation methods, refrigeration and heating frost prevention methods and air conditioning system Download PDF

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Publication number
CN104422193A
CN104422193A CN201310400653.4A CN201310400653A CN104422193A CN 104422193 A CN104422193 A CN 104422193A CN 201310400653 A CN201310400653 A CN 201310400653A CN 104422193 A CN104422193 A CN 104422193A
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China
Prior art keywords
heat exchanger
expansion valve
indoor heat
liquid
valve
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CN201310400653.4A
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Chinese (zh)
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CN104422193B (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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Publication of CN104422193B publication Critical patent/CN104422193B/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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioning system. The air conditioning system comprises a phase change heat accumulator wrapping an outer wall of a compressor, a first liquid accumulation pipeline and a second liquid accumulation pipeline, wherein the phase change heat accumulator is provided with a first liquid passing hole and a second liquid passing hole; one end of the first liquid accumulation pipeline is connected between an expansion valve connected and an outdoor heat exchanger on a first pipeline; the other end of the first liquid accumulation pipeline is connected with the first liquid passing hole; the first liquid accumulation pipeline is connected with a first two-way valve in series; one end of the second liquid accumulation pipeline is connected between the expansion valve and an indoor heat exchanger on the first pipeline by a three-way valve; the other end of the second liquid accumulation pipeline is connected with the second liquid passing hole; the second liquid accumulation pipeline is further provided with a pressure sensor for measuring pressure in the phase change heat accumulator. According to the structural design of the air conditioning system, the circulating cold medium amount in the air conditioning system can be effectively adjusted according to a load working condition of an air conditioner. The invention further discloses a refrigeration liquid accumulation method, a heating liquid accumulation method, a refrigeration frost prevention method and a heating frost prevention method, which are used for the air conditioning system.

Description

Refrigeration, heat and store 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, relate to a kind of air-conditioning system and refrigeration stores liquid method, heats and store liquid method, refrigeration frost prevention method and heat frost prevention method.
Background technology
In prior art, usually in air-conditioning, pour into a certain amount of refrigerant, this quantitative refrigerant circulates realize refrigeration or heat all within air-conditioning systems.But air-conditioning is in actual motion process, and its load of machinery systems is different, and required coolant quantity is not identical yet.When air-conditioning underrun, it does not need a lot of refrigerant, causes the waste of coolant quantity.And when air-conditioning is in underrun, the evaporating temperature of evaporimeter is lower, very easily occur that refrigerant evaporation not exclusively and with liquid or gas-liquid mixed state enters compressor, thus cause being with hydraulic compression, affect the reliability operation of compressor.
In addition, air-conditioning is when carrying out cooling and warming, and the phenomenon of frosting often appears in heat exchanger, in prior art, need when carrying out defrost stopping to carry out cooling and warming process, then carry out defrost, like this then have impact on cooling or heating effect, extend the cooling and warming time accordingly.
In sum, how realizing the coolant quantity circulated in the load condition adjustment air-conditioning system by air-conditioning, is current those skilled in the art's urgent problem.
Summary of the invention
In view of this, first object of the present invention is to provide a kind of air-conditioning system, the structural design of this air-conditioning system can realize the coolant quantity circulated in the load condition adjustment air-conditioning system by air-conditioning effectively, and the refrigeration that present invention also offers for above-mentioned air-conditioning system stores liquid method, heat and store liquid method, refrigeration frost prevention method and heat frost prevention method.
In order to reach above-mentioned first object, the invention provides following technical scheme:
A kind of air-conditioning 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; Also comprise:
Be wrapped in the phase change heat accumulator on described compressor outer wall, and described phase change heat accumulator has the first mistake liquid mouth and second liquid mouth excessively;
What one end was connected between described expansion valve on described first pipeline and described outdoor heat exchanger first stores liquid pipeline, and described first stores the liquid pipeline other end is connected to described first and crosses liquid mouth, and described first stores on liquid pipeline and be serially connected with the first two-port valve;
What one end was connected between described expansion valve on described first pipeline and described indoor heat exchanger by triple valve second stores liquid pipeline, described second stores the liquid pipeline other end is connected to described second and crosses liquid mouth, and described second stores pressure sensor liquid pipeline is also provided with for measuring pressure in described phase change heat accumulator.
Preferably, also comprise the bypass line that one end is communicated with the output of described compressor, the other end of described bypass line is connected between described expansion valve on described first pipeline and described outdoor heat exchanger, and described bypass line is serially connected with the second two-port valve and the throttle capillary tube for reducing pressure by regulating flow.
Refrigeration for air-conditioning system described above stores a liquid method, it is characterized in that, comprises step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the first low load condition, if then carry out storing liquid, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 and enter phase change heat accumulator;
C: stop storing liquid.
Preferably, also comprise in described step B:
If not, then control the input that cross valve switches to compressor to be connected with indoor heat exchanger, the output of compressor is connected with outdoor heat exchanger, and the first two-port valve cuts out, and controls triple valve to expansion valve and to be connected with indoor heat exchanger and expansion valve and indoor heat exchanger are not all connected with the second mistake liquid mouth.
Preferably, described step C is specially:
C 1: when the numerical value of pressure sensor reaches N 1(KPa), time, the aperture P of current expansion valve is recorded 0after, the aperture of expansion valve is down to P 1and control triple valve to expansion valve and to be connected with indoor heat exchanger and expansion valve and second is crossed liquid mouth and is not connected, indoor heat exchanger is not connected with the second mistake liquid mouth, and maintains t 1after (s);
C 2: control the first two-port valve and close, the aperture of expansion valve returns to P 0.
Preferably, also step is comprised after described step C:
D: detect air-conditioning system and whether be in non-first low load condition, if then carry out tapping, namely control the first two-port valve to close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second is crossed liquid mouth and is connected, and refrigerant enters indoor heat exchanger from phase change heat accumulator through the second accumulation of heat loop;
E: when the numerical value of pressure sensor reaches N 2(KPa), time, the aperture P of current expansion valve is recorded 2after, the aperture of expansion valve is down to minimum and maintains t 2s, after (), control triple valve to expansion valve and to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second excessively liquid mouth is not connected, and the aperture of expansion valve is returned to P 2.
Preferably, also step is comprised between step C and D: maintain current state X 1(min).
Preferably, also step F is comprised after step e step: maintain current state X 1(min).
Preferably, described first low load condition is specially when indoor temperature is lower than A 1dEG C and outdoor temperature lower than B 1dEG C, or the difference of indoor temperature and design temperature is lower than C 1dEG C and the running frequency of compressor is less than D 1(H z) time.
Preferably, carrying out storing the detection not carrying out air-conditioning system load condition in liquid or tapping process.
Store a liquid method for heating of air-conditioning system described above, comprise step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the second low load condition, if then carry out storing liquid, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 and enter phase change heat accumulator;
C: stop storing liquid.
Preferably, also comprise in described step b:
If not, then control the input that cross valve switches to compressor to be connected with outdoor heat exchanger, the output of compressor is connected with indoor heat exchanger, and the first two-port valve cuts out, and controls triple valve to expansion valve and to be connected with indoor heat exchanger and expansion valve and indoor heat exchanger are not all connected with the second mistake liquid mouth.
Preferably, described step c is specially:
C1: when the numerical value of pressure sensor reaches N 3(KPa), time, the aperture P of current expansion valve is recorded 3after, the aperture of expansion valve is down to P 4and control the first two-port valve closedown, and maintain t 3(s);
C2: control triple valve to expansion valve and to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second excessively liquid mouth is not connected, and the aperture of expansion valve is returned to P 3.
Preferably, also step is comprised after described step c:
D: detect air-conditioning system and whether be in non-second low load condition, if then carry out tapping, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second is crossed liquid mouth and is not connected, and refrigerant enters outdoor heat exchanger from phase change heat accumulator through the first accumulation of heat loop;
E: when the numerical value of pressure sensor reaches N 4(KPa), time, the aperture P of current expansion valve is recorded 4after, the aperture of expansion valve is down to minimum and maintains t4(s) after, control the first two-port valve and close, the aperture of expansion valve is returned to P 4.
Preferably, also step is comprised between step c and d: maintain current state X 2(min).
Preferably, also step f is comprised after step step e: maintain current state X 2(min).
Preferably, described second low load condition is specially when indoor temperature is higher than A 2dEG C and outdoor temperature higher than B 2dEG C, or the difference of indoor temperature and design temperature is lower than C 2dEG C time.
Preferably, carrying out storing the detection not carrying out air-conditioning system load condition in liquid or tapping process.
For a refrigeration frost prevention method for air-conditioning system described above, comprise step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in first needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 A 3dEG C or the continuous X of temperature of indoor heat exchanger 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second liquid mouth be not connected, indoor heat exchanger and second liquid mouth be not connected.
Preferably, described first frost prevention state is needed to be specially: the continuous X4(min of temperature of indoor heat exchanger) be not more than A5 DEG C, every X 5(min) record a temperature and the temperature of rear record lower than the former, or the temperature of indoor heat exchanger is not more than A 6dEG C and X 5(min) in the time period, temperature decreases beyond A 7dEG C.
Preferably, also comprise in step S2: if not, then control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second excessively liquid mouth be not connected, indoor heat exchanger and the second mistake liquid mouth are not connected.
Heat a frost prevention method for air-conditioning system described above, comprise step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in second needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 A 8dEG C or the continuous X of temperature of indoor heat exchanger 6(min) A is not less than 9dEG C time, stop frost prevention, namely control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second liquid mouth be not connected, indoor heat exchanger and second liquid mouth be not connected.
Preferably, described second frost prevention state is needed to be specially: the continuous X of temperature of outdoor heat exchanger 7(min) A is not more than 10dEG C, every X 8(min) record a temperature and the temperature of rear record lower than the former, or the temperature of indoor heat exchanger is not more than A 11dEG C and X 9(min) in the time period, temperature decreases beyond A 12dEG C.
Preferably, also comprise in step s2: if not, then control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second excessively liquid mouth be not connected, indoor heat exchanger and the second mistake liquid mouth are not connected.
Air-conditioning system provided by the invention, comprise indoor heat exchanger, outdoor heat exchanger, connection indoor heat exchanger and the first pipeline of outdoor heat exchanger, the expansion valve be connected in series with on the first pipeline, for the compressor of compression refrigerant steam and the cross valve that is connected with input and output, indoor heat exchanger and the outdoor heat exchanger of compressor; Also comprise phase change heat accumulator, first to store liquid pipeline and second and store liquid pipeline, wherein phase change heat accumulator is wrapped on compressor outer wall, and phase change heat accumulator has first crosses liquid mouth and second and cross liquid mouth.First stores liquid pipeline one end is connected between expansion valve on the first pipeline and outdoor heat exchanger, and the other end is connected to first and crosses liquid mouth, and first stores on liquid pipeline and be serially connected with the first two-port valve.Second stores liquid pipeline one end is connected between expansion valve on the first pipeline and indoor heat exchanger by triple valve, and the other end is connected to second and crosses liquid mouth, and second stores pressure sensor liquid pipeline is also provided with for measuring pressure in phase change heat accumulator.
When applying air-conditioning system provided by the invention, when air-conditioning system is in low load condition operation, first two-port valve can be opened, and control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second is crossed liquid mouth and is not connected, indoor heat exchanger and second is crossed liquid mouth and is connected, pressure now in phase change heat accumulator is less than the pressure in the first pipeline, make refrigerant store liquid loop and second through first to store liquid loop and enter phase change heat accumulator, carry out storing liquid, namely during air-conditioning underrun, a part of refrigerant is stored in phase change heat accumulator, avoid the reliability operation that refrigerant evaporation not exclusively affects compressor, achieve the coolant quantity circulated in the load condition adjustment air-conditioning system according to air-conditioning.Wherein low load condition comprises the first low load condition when air-conditioning is in refrigerating state and air-conditioning and is 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, comprise step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the first low load condition, if then carry out storing liquid, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 and enter phase change heat accumulator;
C: stop storing liquid.
The refrigeration that this invention provides stores in liquid method, after starting air-conditioning system, if detect, air-conditioning system is in the first low load condition, then control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second is crossed liquid mouth and is connected, pressure now in phase change heat accumulator is less than the pressure in the first pipeline, make refrigerant store liquid loop and second through first to store liquid loop and enter phase change heat accumulator, carry out storing liquid, a part of refrigerant is stored in phase change heat accumulator, avoid the reliability operation that refrigerant evaporation not exclusively affects compressor, achieve the coolant quantity circulated in the load condition adjustment air-conditioning system according to air-conditioning.
Present invention also offers and a kind ofly store liquid method for heating of air-conditioning system described above, comprise step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the second low load condition, if then carry out storing liquid, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 and enter phase change heat accumulator;
C: stop storing liquid.
What this invention provided heat stores in liquid method, after starting air-conditioning system, if detect, air-conditioning system is in the second low load condition, then control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second is crossed liquid mouth and is connected, pressure now in phase change heat accumulator is less than the pressure in the first pipeline, make refrigerant store liquid loop and second through first to store liquid loop and enter phase change heat accumulator, carry out storing liquid, a part of refrigerant is stored in phase change heat accumulator, avoid the reliability operation that refrigerant evaporation not exclusively affects compressor, achieve the coolant quantity circulated in the load condition adjustment air-conditioning system according to air-conditioning.
Present invention also offers a kind of refrigeration frost prevention method for air-conditioning system described above, comprise step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in first needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 A 3dEG C or the continuous X of temperature of indoor heat exchanger 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second liquid mouth be not connected, indoor heat exchanger and second liquid mouth be not connected.
In the refrigeration frost prevention method that this invention provides, after starting air-conditioning system, if detect, air-conditioning system is in first and needs frost prevention state, then control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second is crossed liquid mouth and is connected, refrigerant now in the first pipeline enters phase change heat accumulator through the first accumulation of heat pipeline, and promote phase change heat accumulator and absorb the refrigerant after heat and store liquid loop through second and enter indoor heat exchanger, because phase change heat accumulator is wrapped on the outer wall of compressor, and the temperature of compressor is higher, therefore refrigerant absorbs energy after entering phase change heat accumulator and evaporating temperature raising, the refrigerant absorbed after energy stores liquid loop through second and enters indoor heat exchanger, evaporating temperature improves, the temperature of corresponding indoor heat exchanger raises, realize frost prevention.Further, when the temperature of indoor heat exchanger is higher than A 3dEG C or the continuous X of temperature of indoor heat exchanger 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second liquid mouth be not connected, indoor heat exchanger and second liquid mouth be not connected.
Present invention also offers and a kind ofly heat frost prevention method for air-conditioning system described above, comprise step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in second needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, 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 A 8dEG C or the continuous X of temperature of indoor heat exchanger 6(min) A is not less than 9dEG C time, stop frost prevention, namely control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second liquid mouth be not connected, indoor heat exchanger and second liquid mouth be not connected.
What this invention provided heats in frost prevention method, after starting air-conditioning system, if detect, air-conditioning system is in second and needs frost prevention state, then control the first two-port valve to open, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and the second mistake liquid mouth are not connected, indoor heat exchanger and second is crossed liquid mouth and is connected, refrigerant now in the first pipeline enters phase change heat accumulator through the second accumulation of heat loop, and promote phase change heat accumulator and absorb the refrigerant after heat and store liquid loop through first and enter outdoor heat exchanger, because phase change heat accumulator is wrapped on the outer wall of compressor, and the temperature of compressor is higher, therefore refrigerant absorbs energy after entering phase change heat accumulator and evaporating temperature raising, the refrigerant absorbed after energy stores liquid loop through second and enters outdoor heat exchanger, evaporating temperature improves, the temperature of corresponding outdoor heat exchanger raises, realize frost prevention.Further, when the temperature of outdoor heat exchanger is higher than A 3dEG C or the continuous X of temperature of outdoor heat exchanger 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve and close, control triple valve to expansion valve to be connected with indoor heat exchanger and expansion valve and second liquid mouth be not connected, indoor heat exchanger and second liquid mouth be not connected.
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 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 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;
What Fig. 5 provided for the embodiment of the present invention heats the flow chart storing liquid method;
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;
In accompanying drawing, mark is as follows:
1-second two-port valve, 2-cross valve, 3-throttle capillary tube, 4-outdoor heat exchanger, 5-outdoor fan, 6-expansion valve, 7-first two-port valve, 8-triple valve, 9-pressure sensor, 10-indoor fan, 11-indoor heat exchanger, 12-phase change heat accumulator, 13-compressor.
Detailed description of the invention
First object of the present invention is to provide a kind of air-conditioning system, the structural design of this air-conditioning system can realize the coolant quantity circulated in the load condition adjustment air-conditioning system by air-conditioning effectively, and the refrigeration that present invention also offers for above-mentioned air-conditioning system stores liquid method, heat and store 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, 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.
Refer to Fig. 1, the air-conditioning system that the embodiment of the present invention provides, comprise indoor heat exchanger 11, outdoor heat exchanger 4, connect indoor heat exchanger 11 and the first pipeline of outdoor heat exchanger 4, the expansion valve 6 be connected in series with on the first pipeline, for the compressor 13 of compression refrigerant steam and the cross valve 2 that is connected with input and output, indoor heat exchanger 11 and the outdoor heat exchanger 4 of compressor 13; Also comprise phase change heat accumulator 12, first to store liquid pipeline and second and store liquid pipeline, wherein phase change heat accumulator 12 is wrapped on compressor 13 outer wall, and phase change heat accumulator 12 has first crosses liquid mouth and second and cross liquid mouth.First stores liquid pipeline one end is connected between expansion valve 6 on the first pipeline and outdoor heat exchanger 4, and the other end is connected to first and crosses liquid mouth, and first stores on liquid pipeline and be serially connected with the first two-port valve 7.Second stores liquid pipeline one end is connected between expansion valve 6 on the first pipeline and indoor heat exchanger 11 by triple valve 8, the other end is connected to second and crosses liquid mouth, and second stores the pressure sensor 9 liquid pipeline is also provided with for measuring pressure in phase change heat accumulator 12.
During the air-conditioning system that the application embodiment of the present invention provides, when air-conditioning system is in low load condition operation, first two-port valve 7 can be opened, and control triple valve 8 to expansion valve 6 to be connected with indoor heat exchanger 11 and expansion valve 6 and second is crossed liquid mouth and is not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, pressure now in phase change heat accumulator 12 is less than the pressure in the first pipeline, make refrigerant store liquid loop and second through first to store liquid loop and enter phase change heat accumulator 12, carry out storing liquid, namely during air-conditioning underrun, a part of refrigerant is stored in phase change heat accumulator 12, avoid the reliability operation that refrigerant evaporation not exclusively affects compressor 13, achieve the coolant quantity circulated in the load condition adjustment air-conditioning system according to air-conditioning.Wherein low load condition comprises the first low load condition when air-conditioning is in refrigerating state and air-conditioning and is in the second low load condition when heating state.
In addition, the air-conditioning system that the embodiment of the present invention can also be utilized to provide carries out frost prevention, when air-conditioning system be in need frost prevention state time, part refrigerant can be made to absorb after energy through phase change heat accumulator 12 and to enter the first pipeline again, improve evaporating temperature, realize frost prevention.Wherein needing frost prevention state to comprise first needs frost prevention state and second to need frost prevention state.
In order to optimize technique scheme further, the bypass line that one end is communicated with the output of compressor 13 can also be comprised, the other end of bypass line is connected between expansion valve 6 on the first pipeline and outdoor heat exchanger 4, and bypass line is serially connected with the second two-port valve 1 and the throttle capillary tube 3 for reducing pressure by regulating flow.Setting like this, the refrigerant of HTHP through bypass line, thus can heat outdoor heat exchanger 4.
Wherein, compressor 13 can be compound compressor.Phase change heat accumulator 12 can comprise being wrapped in compressor 13 outer wall presses down die holder, be arranged at the storage heater housing pressed down in die holder, and in storage heater housing, be filled with heat-storing material, heat-storing material is provided with heat exchange copper tube, also comprise the top die lid for fixing heat exchange copper tube.Wherein, heat exchange copper tube can carry out storage refrigerant.Expansion valve 6 can be electric expansion valve.In addition, at outdoor heat exchanger 4, place also arranges outdoor fan 5, goes out to be provided with indoor fan 10 at indoor heat exchanger 11 simultaneously.
Refer to Fig. 2 and Fig. 3, the embodiment of the present invention additionally provides a kind of refrigeration for air-conditioning system described above and stores liquid method, comprises step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the first low load condition, if then carry out storing liquid, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop and enter 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 detect, air-conditioning system is in the first low load condition, then control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, pressure now in phase change heat accumulator 12 is less than the pressure in the first pipeline, make refrigerant store liquid loop and second through first to store liquid loop and enter phase change heat accumulator 12, carry out storing liquid, a part of refrigerant is stored in phase change heat accumulator 12, avoid the reliability operation that refrigerant evaporation not exclusively affects compressor 13, achieve the coolant quantity circulated in the load condition adjustment air-conditioning system according to air-conditioning.
In order to optimize technique scheme further, above-mentioned steps B is specifically as follows: detect air-conditioning system and whether be in the first low load condition, if then carry out storing liquid, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop and enter phase change heat accumulator 12; If not, then control the input that cross valve 2 switches to compressor 13 to be connected with indoor heat exchanger 11, the output of compressor 13 is connected with outdoor heat exchanger 4, first two-port valve 7 cuts out, and controls triple valve 8 to expansion valve 6 and to be connected with indoor heat exchanger 11 and expansion valve 6 and indoor heat exchanger 11 are not all connected with the second mistake liquid mouth.Namely carry out when air-conditioning system is in the first low load condition storing liquid, when air-conditioning system is not in the first low load condition, then air-conditioning system normally works.
In above-mentioned steps C, specifically can comprise C 1: when the numerical value of pressure sensor 9 reaches N 1(KPa), time, the aperture P of current expansion valve 6 is recorded 0after, the aperture of expansion valve 6 is down to P 1and control triple valve 8 to expansion valve 6 and to be connected with indoor heat exchanger 11 and expansion valve 6 and second is crossed liquid mouth and is not connected, indoor heat exchanger 11 is not connected with the second mistake liquid mouth, and maintains t 1after (s);
C 2: control the first two-port valve 7 and close, the aperture of expansion valve returns to P 0.
Namely when the numerical value of pressure sensor 9 reaches N 1(KPa), time, close second and store liquid loop, make refrigerant store liquid loop by means of only first and enter phase change heat accumulator 12, make the aperture of expansion valve 6 be down to P simultaneously 1, store liquid loop to make more refrigerant through first and enter phase change heat accumulator 12, maintain t 1after (s), then close and then close first by control first two-port valve 7 and store liquid loop, thus realize stopping and storing liquid.
Certain step C can also be specially, after setting-up time section, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is not connected, control the first two-port valve 7 to close simultaneously, namely closedown first stores liquid loop and second and stores liquid loop simultaneously, in this no limit.
In the present embodiment, step can also be comprised after above-mentioned steps C:
D: detect air-conditioning system and whether be in non-first low load condition, if then carry out tapping, namely control the first two-port valve 7 to close, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant enters indoor heat exchanger 11 from phase change heat accumulator 12 through the second accumulation of heat loop;
By controlling triple valve 8 to expansion valve 6 and to be connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth not being connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, now the pressure of phase change heat accumulator 12 is greater than the pressure in the first pipeline, make refrigerant enter indoor heat exchanger 11 from phase change heat accumulator 12 through the second accumulation of heat loop, realize tapping.
E: when the numerical value of pressure sensor 9 reaches N 2(KPa), time, the aperture P of current expansion valve 6 is recorded 2after, the aperture of expansion valve 6 is down to minimum and maintains t 2s, after (), control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, and indoor heat exchanger 11 and second is crossed liquid mouth and is not connected, and the aperture of expansion valve 6 is returned to P 2.
Strengthen by the aperture of expansion valve 6 being down to the minimum pressure differential making the first pipeline and second store between liquid loop, the refrigerant advantageously in phase change heat accumulator 12 stores liquid loop through second and flows back to indoor heat exchanger 11.
Preferably, also step is comprised between step C and D: maintain current state X 1(min).Like this then keep air-conditioning system run X 1(min) after, then the detection of air-conditioning system running status is carried out.
Same, also comprise step F after step e step: maintain current state X 1(min).I.e. X 1(min) load condition detecting air-conditioning system is carried out after again.
In addition, the first low load condition is specially when indoor temperature is lower than A 1dEG C and outdoor temperature lower than B 1dEG C, or the difference of indoor temperature and design temperature is lower than C 1dEG C and the running frequency of compressor 13 is less than D 1(H z) time.
Indoor temperature is detected, when indoor temperature temperature is lower than A by set temperature checkout gear 1dEG C and outdoor temperature lower than B 1dEG C, or the difference of indoor temperature and design temperature is lower than C 1dEG C and the running frequency of compressor 13 is less than D 1(H z) time, control air-conditioning system enters and stores liquid step.
Certain first low load condition can also be that only indoor temperature is lower than a certain temperature, and this temperature specifically can set according to Various Seasonal.
It should be noted that, carrying out storing the detection not carrying out air-conditioning system load condition in liquid or tapping process.
Refer to Fig. 4 and Fig. 5, the embodiment of the present invention additionally provides and a kind ofly stores liquid method for heating of air-conditioning system described above, comprises step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the second low load condition, if then carry out storing liquid, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop and enter phase change heat accumulator 12;
C: stop storing liquid.
What this inventive embodiments provided heat stores in liquid method, after starting air-conditioning system, if detect, air-conditioning system is in the second low load condition, then control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, pressure now in phase change heat accumulator 12 is less than the pressure in the first pipeline, make refrigerant store liquid loop and second through first to store liquid loop and enter phase change heat accumulator 12, carry out storing liquid, a part of refrigerant is stored in phase change heat accumulator 12, avoid the reliability operation that refrigerant evaporation not exclusively affects compressor 13, achieve the coolant quantity circulated in the load condition adjustment air-conditioning system according to air-conditioning.
In order to optimize technique scheme further, above-mentioned steps b is specifically as follows: detect air-conditioning system and whether be in the second low load condition, if then carry out storing liquid, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop and enter phase change heat accumulator 12; If not, then control the input that cross valve 2 switches to compressor 13 to be connected with outdoor heat exchanger 4, the output of compressor 13 is connected with indoor heat exchanger 11, first two-port valve 7 cuts out, and controls triple valve 8 to expansion valve 6 and to be connected with indoor heat exchanger 11 and expansion valve 6 and indoor heat exchanger 11 are not all connected with the second mistake liquid mouth.Namely carry out when air-conditioning system is in the second low load condition storing liquid, when air-conditioning system is not in the second low load condition, then air-conditioning system normally works.
In above-mentioned steps c, specifically can comprise c1: when the numerical value of pressure sensor 9 reaches N 3(KPa), time, the aperture P of current expansion valve 6 is recorded 3after, the aperture of expansion valve 6 is down to P 4and control the first two-port valve 7 and close, and maintain t 3(s);
C2: control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, and indoor heat exchanger 11 and second is crossed liquid mouth and is not connected, and the aperture of expansion valve is returned to P 3.
Namely when the numerical value of pressure sensor 9 reaches N 3(KPa), time, close first and store liquid loop, make refrigerant store liquid loop by means of only second and enter phase change heat accumulator 12, and make the aperture of expansion valve 6 be down to P 4, store liquid loop to make more refrigerant through second and enter phase change heat accumulator 12, maintain t 3after (s), then by control triple valve 8 to expansion valve 6 and to be connected with indoor heat exchanger 11 and expansion valve 6 with second excessively liquid mouth be not connected, indoor heat exchanger 11 and the second mistake liquid mouth are not connected and then close second and store liquid loop, thus realize stopping and storing liquid.
Certain step c can also be specially, after setting-up time section, control triple valve 8 to expansion valve is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is not connected, control the first two-port valve 7 to close simultaneously, namely closedown first stores liquid loop and second and stores liquid loop simultaneously, in this no limit.
In the present embodiment, step can also be comprised after above-mentioned steps c:
D: detect air-conditioning system and whether be in non-second low load condition, if then carry out tapping, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is not connected, and refrigerant enters outdoor heat exchanger 4 from phase change heat accumulator 12 through the first accumulation of heat loop;
By controlling triple valve 8 to expansion valve 6 and to be connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth not being connected, indoor heat exchanger 11 and second is crossed liquid mouth and is not connected, control the first two-port valve 7 to open simultaneously, now the pressure of phase change heat accumulator 12 is greater than the pressure in the first pipeline, make refrigerant enter outdoor heat exchanger 4 from phase change heat accumulator 12 through the first accumulation of heat loop, realize tapping.
E: when the numerical value of pressure sensor 9 reaches N 4(KPa), time, the aperture P of current expansion valve 6 is recorded 4after, the aperture of expansion valve 6 is down to minimum and maintains t 4after (s), control the first two-port valve 7 and close, the aperture of expansion valve 6 is returned to P 4.
Strengthen by the aperture of expansion valve 6 being down to the minimum pressure differential making the first pipeline and first store between liquid loop, the refrigerant advantageously in phase change heat accumulator 12 stores liquid loop through first and flows back to outdoor heat exchanger 4.
Preferably, also step is comprised between step c and d: maintain current state X 2(min).Like this then keep air-conditioning system run X 2(min) after, then the detection of air-conditioning system running status is carried out.
Same, also comprise step f after step step e: maintain current state X 2(min).I.e. X 2(min) load condition detecting air-conditioning system is carried out after again.
In addition, the second low load condition is specially when indoor temperature is higher than A 2dEG C and outdoor temperature higher than B 2dEG C, or the difference of indoor temperature and design temperature is lower than C 2dEG C time.
Indoor temperature is detected, when indoor temperature temperature is higher than A by set temperature checkout gear 2dEG C and outdoor temperature higher than B 2dEG C, or the difference of indoor temperature and design temperature is lower than C 2dEG C time, control air-conditioning system and 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 specifically can set according to Various Seasonal.
It should be noted that, carrying out storing the detection not carrying out air-conditioning system load condition in liquid or tapping process.
Refer to Fig. 6 and Fig. 7, the embodiment of the present invention additionally provides a kind of refrigeration frost prevention method for air-conditioning system described above, comprises step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in first needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through second and enters indoor heat exchanger 11;
S3: when the temperature of indoor heat exchanger 11 is higher than A 3dEG C or the continuous X of temperature of indoor heat exchanger 11 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve 7 and close, control triple valve 8 to expansion valve 6 be connected with indoor heat exchanger 11 and expansion valve 6 with second excessively liquid mouth be not connected, indoor heat exchanger 11 and the second mistake liquid mouth are not connected.
In the refrigeration frost prevention method that this inventive embodiments provides, after starting air-conditioning system, if detect, air-conditioning system is in first and needs frost prevention state, then control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, refrigerant now in the first pipeline enters phase change heat accumulator 12 through the first accumulation of heat pipeline, and promote phase change heat accumulator 12 absorb heat after refrigerant store liquid loop through second and enter indoor heat exchanger 11, because phase change heat accumulator 12 is wrapped on the outer wall of compressor 13, and the temperature of compressor 13 is higher, therefore refrigerant absorbs energy after entering phase change heat accumulator 12 and evaporating temperature raising, the refrigerant absorbed after energy stores liquid loop through second and enters indoor heat exchanger 11, evaporating temperature improves, the temperature of corresponding indoor heat exchanger 11 raises, realize frost prevention.Further, when the temperature of indoor heat exchanger 11 is higher than A 3dEG C or the continuous X of temperature of indoor heat exchanger 11 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve 7 and close, control triple valve 8 to expansion valve 6 be connected with indoor heat exchanger 11 and expansion valve 6 with second excessively liquid mouth be not connected, indoor heat exchanger 11 and the second mistake liquid mouth are not connected.
Wherein, first frost prevention state is needed to be specially: the continuous X of temperature of indoor heat exchanger 11 4(min) A is not more than 5dEG C, and every X 5(min) record a temperature and the temperature of rear record lower than the former, or the temperature of indoor heat exchanger 11 is not more than A 6dEG C and X 5(min) in the time period, temperature decreases beyond A 7dEG C.
Certainly, first frost prevention state is needed to can moreover be only the continuous X of temperature of indoor heat exchanger 11 4(min) A is not more than 5dEG C, in this no limit.
Step S2 can be specially: whether detection air-conditioning system is in first needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through second and enters indoor heat exchanger 11; If not, then 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 and the second mistake liquid mouth are not connected, and indoor heat exchanger 11 and second is crossed liquid mouth and is not connected.
Namely need to carry out frost prevention during frost prevention state when air-conditioning system is in first, when air-conditioning system be not in first need frost prevention state time, then air-conditioning system normally works.
Refer to Fig. 8 and Fig. 9, the embodiment of the present invention additionally provides and a kind ofly heats frost prevention method for air-conditioning system described above, comprises step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in second needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through first and enters outdoor heat exchanger 4;
S3: when the temperature of outdoor heat exchanger 4 is higher than A 8dEG C or the continuous X of temperature of indoor heat exchanger 11 6(min) A is not less than 9dEG C time, stop frost prevention, namely control the first two-port valve 7 and close, control triple valve 8 to expansion valve 6 be connected with indoor heat exchanger 11 and expansion valve 6 with second excessively liquid mouth be not connected, indoor heat exchanger 11 and the second mistake liquid mouth are not connected.
What this inventive embodiments provided heats in frost prevention method, after starting air-conditioning system, if detect, air-conditioning system is in second and needs frost prevention state, then control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, refrigerant now in the first pipeline enters phase change heat accumulator 12 through the second accumulation of heat loop, and promote phase change heat accumulator 12 absorb heat after refrigerant store liquid loop through first and enter outdoor heat exchanger 4, because phase change heat accumulator 12 is wrapped on the outer wall of compressor 13, and the temperature of compressor 13 is higher, therefore refrigerant absorbs energy after entering phase change heat accumulator 12 and evaporating temperature raising, the refrigerant absorbed after energy stores liquid loop through second and enters outdoor heat exchanger 4, evaporating temperature improves, the temperature of corresponding outdoor heat exchanger 4 raises, realize frost prevention.Further, when the temperature of outdoor heat exchanger 4 is higher than the continuous X of temperature of A3 DEG C or outdoor heat exchanger 4 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve 7 and close, control triple valve 8 to expansion valve 6 be connected with indoor heat exchanger 11 and expansion valve 6 with second excessively liquid mouth be not connected, indoor heat exchanger 11 and the second mistake liquid mouth are not connected.
Wherein, second frost prevention state is needed to be specially: the continuous X of temperature of outdoor heat exchanger 4 7(min) A is not more than 10dEG C, and every X 8(min) record a temperature and the temperature of rear record lower than the former, or the temperature of indoor heat exchanger 11 is not more than A 11dEG C and X 9(min) in the time period, temperature decreases beyond A 12dEG C.
Certainly, second frost prevention state is needed to can moreover be only the continuous X7(min of temperature of outdoor heat exchanger 4) be not more than A 10dEG C situation, in this no limit.
Step s2 can be specially: whether detection air-conditioning system is in second needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve 7 to open, control triple valve 8 to expansion valve 6 is connected with indoor heat exchanger 11 and expansion valve 6 and the second mistake liquid mouth are not connected, indoor heat exchanger 11 and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through first and enters outdoor heat exchanger 4; If not, then 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 and the second mistake liquid mouth are not connected, and indoor heat exchanger 11 and second is crossed liquid mouth and is not connected.
Namely need to carry out frost prevention during frost prevention state when air-conditioning system is in second, when air-conditioning system be not in second need frost prevention state time, then air-conditioning system normally works.
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 (24)

1. an air-conditioning system, comprising:
Indoor heat exchanger (11);
Outdoor heat exchanger (4);
Connect the first pipeline of described indoor heat exchanger (11) and described outdoor heat exchanger (4);
Be connected in series with the expansion valve (6) on described first pipeline;
For the compressor (13) of compression refrigerant steam;
The cross valve (2) be connected with input and output, described indoor heat exchanger (11) and the described outdoor heat exchanger (4) of described compressor (13); It is characterized in that, also comprise:
Be wrapped in the phase change heat accumulator (12) on described compressor (13) outer wall, and described phase change heat accumulator (12) has the first mistake liquid mouth and second liquid mouth excessively;
What one end was connected between described expansion valve (6) on described first pipeline and described outdoor heat exchanger (4) first stores liquid pipeline, described first stores the liquid pipeline other end is connected to described first and crosses liquid mouth, and described first stores on liquid pipeline and be serially connected with the first two-port valve (7);
What one end was connected between described expansion valve (6) on described first pipeline and described indoor heat exchanger (11) by triple valve (8) second stores liquid pipeline, described second stores the liquid pipeline other end is connected to described second and crosses liquid mouth, and described second stores the pressure sensor (9) liquid pipeline is also provided with for measuring described phase change heat accumulator (12) interior pressure.
2. air-conditioning system according to claim 1, it is characterized in that, also comprise the bypass line that one end is communicated with the output of described compressor (13), the other end of described bypass line is connected between described expansion valve (6) on described first pipeline and described outdoor heat exchanger (4), and described bypass line is serially connected with the second two-port valve (1) and the throttle capillary tube (3) for reducing pressure by regulating flow.
3. the refrigeration for the air-conditioning system such as according to any one of claim 1-2 stores a liquid method, it is characterized in that, comprises step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the first low load condition, if then carry out storing liquid, namely control the first two-port valve (7) to open, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop and enter phase change heat accumulator (12);
C: stop storing liquid.
4. refrigeration according to claim 3 stores liquid method, it is characterized in that, also comprises in described step B:
If not, then control the input that cross valve (2) switches to compressor (13) to be connected with indoor heat exchanger (11), the output of compressor (13) is connected with outdoor heat exchanger (4), first two-port valve (7) cuts out, and controls triple valve (8) to expansion valve (6) and to be connected with indoor heat exchanger (11) and expansion valve (6) and indoor heat exchanger (11) are not all connected with the second mistake liquid mouth.
5. refrigeration according to claim 3 stores liquid method, it is characterized in that, described step C is specially:
C 1: when the numerical value of pressure sensor (9) reaches N 1(KPa), time, the aperture P of current expansion valve (6) is recorded 0after, the aperture of expansion valve (6) is down to P 1and control triple valve (8) to expansion valve (6) and to be connected with indoor heat exchanger (11) and expansion valve (6) and second is crossed liquid mouth and is not connected, indoor heat exchanger (11) is not connected with the second mistake liquid mouth, and maintains t 1after (s);
C 2: control the first two-port valve (7) and close, the aperture of expansion valve returns to P 0.
6. refrigeration according to claim 3 stores liquid method, it is characterized in that, also comprises step after described step C:
D: detect air-conditioning system and whether be in non-first low load condition, if then carry out tapping, namely control the first two-port valve (7) to close, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second is crossed liquid mouth and is connected, and 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 N 2(KPa), time, the aperture P of current expansion valve (6) is recorded 2after, the aperture of expansion valve (6) is down to minimum and is maintained t 2s, after (), control triple valve (8) to expansion valve (6) and to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second excessively liquid mouth is not connected, and the aperture of expansion valve (6) is returned to P 2.
7. refrigeration according to claim 6 stores liquid method, it is characterized in that, also comprises step between step C and D: maintain current state X 1(min).
8. refrigeration according to claim 6 stores liquid method, it is characterized in that, also comprises step F after step e step: maintain current state X 1(min).
9. refrigeration according to claim 3 stores liquid method, it is characterized in that, described first low load condition is specially when indoor temperature is lower than A 1dEG C and outdoor temperature lower than B 1dEG C, or the difference of indoor temperature and design temperature is lower than C 1dEG C and the running frequency of compressor (13) is less than D 1(H z) time.
10. refrigeration according to claim 6 stores liquid method, it is characterized in that, is carrying out storing the detection not carrying out air-conditioning system load condition in liquid or tapping process.
11. 1 kinds store liquid method for heating of the air-conditioning system such as according to any one of claim 1-2, it is characterized in that, comprise step:
A: start air-conditioning system;
B: detect air-conditioning system and whether be in the second low load condition, if then carry out storing liquid, namely control the first two-port valve (7) to open, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop and second through first and stores liquid loop and enter phase change heat accumulator (12);
C: stop storing liquid.
12. according to claim 11 heating store liquid method, it is characterized in that, also comprise in described step b:
If not, then control the input that cross valve (2) switches to compressor (13) to be connected with outdoor heat exchanger (4), the output of compressor (13) is connected with indoor heat exchanger (11), first two-port valve (7) cuts out, and controls triple valve (8) to expansion valve (6) and to be connected with indoor heat exchanger (11) and expansion valve (6) and indoor heat exchanger (11) are not all connected with the second mistake liquid mouth.
13. according to claim 11 heating store liquid method, and it is characterized in that, described step c is specially:
C1: when the numerical value of pressure sensor (9) reaches N 3(KPa), time, the aperture P of current expansion valve (6) is recorded 3after, the aperture of expansion valve (6) is down to P 4and control the first two-port valve (7) closedown, and maintain t 3(s);
C2: control triple valve (8) to expansion valve (6) and to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second excessively liquid mouth is not connected, and the aperture of expansion valve is returned to P 3.
14. according to claim 11 heating store liquid method, it is characterized in that, also comprise step after described step c:
D: detect air-conditioning system and whether be in non-second low load condition, if then carry out tapping, namely control the first two-port valve (7) to open, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second is crossed liquid mouth and is not connected, and 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 N 4(KPa), time, the aperture P of current expansion valve (6) is recorded 4after, the aperture of expansion valve (6) is down to minimum and is maintained t 4after (s), control the first two-port valve (7) and close, the aperture of expansion valve (6) is returned to P 4.
15. according to claim 14 heating store liquid method, it is characterized in that, also comprise step between step c and d: maintain current state X 2(min).
16. according to claim 14 heating store liquid method, it is characterized in that, also comprise step f after step step e: maintain current state X 2(min).
17. according to claim 11 heating store liquid method, it is characterized in that, described second low load condition is specially when indoor temperature is higher than A 2dEG C and outdoor temperature higher than B 2dEG C, or the difference of indoor temperature and design temperature is lower than C 2dEG C time.
18. according to claim 14 heating store liquid method, it is characterized in that, are carrying out storing the detection not carrying out air-conditioning system load condition in liquid or tapping process.
19. 1 kinds, for the refrigeration frost prevention method of the air-conditioning system such as according to any one of claim 1-2, is characterized in that, comprise step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in first needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve (7) to open, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through second and enters indoor heat exchanger (11);
S3: when the temperature of indoor heat exchanger (11) is higher than A 3dEG C or the continuous X of temperature of indoor heat exchanger (11) 3(min) A is not less than 4dEG C time, stop frost prevention, namely control the first two-port valve (7) and close, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and second liquid mouth be not connected, indoor heat exchanger (11) and second liquid mouth be not connected.
20. refrigeration frost prevention methods according to claim 19, it is characterized in that, described first needs frost prevention state to be specially: the continuous X of temperature of indoor heat exchanger (11) 4(min) A is not more than 5dEG C, every X 5(min) record a temperature and the temperature of rear record lower than the former, or the temperature of indoor heat exchanger (11) is not more than A 6dEG C and X 5(min) in the time period, temperature decreases beyond A 7dEG C.
21. refrigeration frost prevention methods according to claim 19, it is characterized in that, also comprise in step S2: if not, then control the first two-port valve (7) to close, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second excessively liquid mouth is not connected.
22. 1 kinds heat frost prevention method for the air-conditioning system such as according to any one of claim 1-2, it is characterized in that, comprise step:
S1: start air-conditioning system;
S2: whether detection air-conditioning system is in second needs frost prevention state, if then carry out frost prevention, namely control the first two-port valve (7) to open, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second is crossed liquid mouth and is connected, and refrigerant stores liquid loop through first and enters outdoor heat exchanger (4);
S3: when the temperature of outdoor heat exchanger (4) is higher than A 8dEG C or the continuous X of temperature of indoor heat exchanger (11) 6(min) A is not less than 9dEG C time, stop frost prevention, namely control the first two-port valve (7) and close, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and second liquid mouth be not connected, indoor heat exchanger (11) and second liquid mouth be not connected.
23. refrigeration frost prevention methods according to claim 22, it is characterized in that, described second needs frost prevention state to be specially: the continuous X of temperature of outdoor heat exchanger (4) 7(min) A is not more than 10dEG C, every X 8(min) record a temperature and the temperature of rear record lower than the former, or the temperature of indoor heat exchanger (11) is not more than A 11dEG C and X 9(min) in the time period, temperature decreases beyond A 12dEG C.
24. refrigeration frost prevention methods according to claim 22, it is characterized in that, also comprise in step s2: if not, then control the first two-port valve (7) to close, control triple valve (8) to expansion valve (6) to be connected with indoor heat exchanger (11) and expansion valve (6) and the second mistake liquid mouth are not connected, indoor heat exchanger (11) and second excessively liquid mouth is not connected.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105352234A (en) * 2015-11-02 2016-02-24 长沙理工大学 Self-adaptive phase-change condensing air conditioner system and implementation method thereof
CN106907825A (en) * 2017-02-06 2017-06-30 美的集团股份有限公司 Air-conditioning system and air-conditioner control method
CN108317772A (en) * 2017-01-17 2018-07-24 青岛海尔新能源电器有限公司 A kind of Gas-supplying enthalpy-increasing system and household electrical appliance
CN110293817A (en) * 2019-06-24 2019-10-01 珠海格力电器股份有限公司 A kind of Heat Pump Air Conditioning System for Electric Vehicles and its Defrost method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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EP3244141A1 (en) * 2016-05-09 2017-11-15 Vaillant GmbH Defrosting with heat generated by compressor driver
CN106828027B (en) * 2017-01-23 2023-04-18 郑州科林车用空调有限公司 Vehicle heat pump air conditioner adopting pressure sensor
CN107449626B (en) * 2017-08-31 2023-08-04 山东奇威特太阳能科技有限公司 Heat accumulator testing system and heat accumulator testing method based on same
CN115388573B (en) * 2022-08-03 2023-12-08 浙江吉利控股集团有限公司 Heat exchange system for vehicle and vehicle with heat exchange system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0331666A (en) * 1989-06-28 1991-02-12 Matsushita Electric Ind Co Ltd Heat pump type air conditioner
JPH0387576A (en) * 1989-08-30 1991-04-12 Mitsubishi Electric Corp Air conditioner
JP2010032097A (en) * 2008-07-28 2010-02-12 Fuji Electric Retail Systems Co Ltd Refrigerant circuit device
CN202692530U (en) * 2012-07-30 2013-01-23 珠海格力电器股份有限公司 Heat-pump air-conditioning system
CN202692529U (en) * 2012-07-30 2013-01-23 珠海格力电器股份有限公司 Heat-pump air-conditioning system
CN202709311U (en) * 2012-07-25 2013-01-30 珠海格力电器股份有限公司 Air conditioner system
CN203443192U (en) * 2013-09-05 2014-02-19 珠海格力电器股份有限公司 Air conditioning system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0331666A (en) * 1989-06-28 1991-02-12 Matsushita Electric Ind Co Ltd Heat pump type air conditioner
JPH0387576A (en) * 1989-08-30 1991-04-12 Mitsubishi Electric Corp Air conditioner
JP2010032097A (en) * 2008-07-28 2010-02-12 Fuji Electric Retail Systems Co Ltd Refrigerant circuit device
CN202709311U (en) * 2012-07-25 2013-01-30 珠海格力电器股份有限公司 Air conditioner system
CN202692530U (en) * 2012-07-30 2013-01-23 珠海格力电器股份有限公司 Heat-pump air-conditioning system
CN202692529U (en) * 2012-07-30 2013-01-23 珠海格力电器股份有限公司 Heat-pump air-conditioning system
CN203443192U (en) * 2013-09-05 2014-02-19 珠海格力电器股份有限公司 Air conditioning system

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105352234A (en) * 2015-11-02 2016-02-24 长沙理工大学 Self-adaptive phase-change condensing air conditioner system and implementation method thereof
CN105352234B (en) * 2015-11-02 2017-12-08 长沙理工大学 A kind of adaptive phase transformation condensation air conditioner system and its implementation
CN108317772A (en) * 2017-01-17 2018-07-24 青岛海尔新能源电器有限公司 A kind of Gas-supplying enthalpy-increasing system and household electrical appliance
CN108317772B (en) * 2017-01-17 2021-03-09 青岛海尔新能源电器有限公司 Air-supplying and enthalpy-increasing system and household appliance
CN106907825A (en) * 2017-02-06 2017-06-30 美的集团股份有限公司 Air-conditioning system and air-conditioner control method
CN110293817A (en) * 2019-06-24 2019-10-01 珠海格力电器股份有限公司 A kind of Heat Pump Air Conditioning System for Electric Vehicles and its Defrost method
CN110293817B (en) * 2019-06-24 2021-05-11 珠海格力电器股份有限公司 Electric vehicle heat pump air conditioning system and defrosting method thereof

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