CN104676856A - Air conditioner and refrigeration control method thereof - Google Patents
Air conditioner and refrigeration control method thereof Download PDFInfo
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- CN104676856A CN104676856A CN201510091802.2A CN201510091802A CN104676856A CN 104676856 A CN104676856 A CN 104676856A CN 201510091802 A CN201510091802 A CN 201510091802A CN 104676856 A CN104676856 A CN 104676856A
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- preset temperature
- temperature
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- expansion valve
- threshold value
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention discloses an air conditioner and a refrigeration control method thereof. The air conditioner comprises an outdoor heat exchanger, a compressor, a first temperature sensor and a control module, wherein an exhaust port of the compressor is connected to the inlet end of the outdoor heat exchanger, the compressor is provided with a cooling device, one end of the cooling device is connected with the outdoor heat exchanger through an electronic expansion valve, and the other end of the cooling device is connected with a suction port of the compressor; the first temperature sensor is used for detecting outdoor environment temperature; the control module is used for controlling the electronic expansion valve to open when the outdoor environment temperature is greater than first preset temperature, so that the compressor can be cooled by the cooling device, and the system pressure of the air conditioner is reduced during operation. The air conditioner can be used for operating and refrigerating at high temperature, and the system operation pressure can be effectively reduced during system overload, so that the air conditioning system can continuously operate, the system reliability is increased, and the user experience is improved.
Description
Technical field
The present invention relates to air-conditioner technical field, particularly relate to a kind of air-conditioner and refrigeration control method thereof.
Background technology
At present, air-conditioner uses region expanding day, and spread all over the world each corner, and use crowd's expanding day, user is also more and more higher to the instructions for use desired by air-conditioner.When refrigeration mode in conventional air conditioner is in indoor use with in outdoor application, its scope of application can be different, and the such as indoor scope of application is 17-32 DEG C, outdoor application scope 0-50 DEG C, can find out, traditional air-conditioner have ignored user to high-temperature refrigeration demand.
Along with Global Greenhouse Effect impact is increasing, global temperatures is more and more higher, in some high-temperature operation region, as worked as outdoor environment temperature 50 DEG C to 65 DEG C scopes, the demand of people to high-temperature refrigeration is more prevalent, but traditional air-conditioner is at high temperature overload operating mode running refrigerating, system high side pressure is easy to exceed the compressor scope of application, thus cause compressor stop jumping, system cisco unity malfunction, poor reliability, and compressor is fragile, Consumer's Experience is caused to be deteriorated.
Summary of the invention
Object of the present invention is intended to solve one of above-mentioned technical problem at least to a certain extent.
For this reason, first object of the present invention is to propose a kind of air-conditioner.This air-conditioner can running refrigerating under the high temperature conditions, and can make effectively to reduce system running pressure during system overcharge, to enable air-conditioning system continuous firing, improves system reliability, improves Consumer's Experience.
Second object of the present invention is the refrigeration control method proposing a kind of air-conditioner.
For achieving the above object, the air-conditioner of first aspect present invention embodiment, comprising: outdoor heat exchanger; Compressor, the exhaust outlet of described compressor is connected with the entrance point of described outdoor heat exchanger, described compressor has cooling device, and one end of described cooling device is connected with described outdoor heat exchanger by electric expansion valve, and the other end of described cooling device is connected with the air entry of described compressor; First temperature sensor, described first temperature sensor is for detecting outdoor environment temperature; And control module, described control module controls described electric expansion valve and opens described cooling device is cooled described compressor when described outdoor environment temperature is greater than the first preset temperature, and reduces system pressure when described air-conditioner runs.
According to the air-conditioner of the embodiment of the present invention, cooling device is carried by compressor, one end of cooling device is connected with outdoor heat exchanger by electric expansion valve, the other end of cooling device is connected with the air entry of compressor, and by the first temperature sensor sensing chamber external environment, and control electric expansion valve when outdoor environment temperature is greater than the first preset temperature by control module and open cooling device is cooled compressor, and the system pressure reduced when air-conditioner runs, make air-conditioner can running refrigerating under the high temperature conditions, and can make effectively to reduce system running pressure during system overcharge, to enable air-conditioning system continuous firing, improve system reliability, improve Consumer's Experience.
According to one embodiment of present invention, described control module also regulates the aperture of described electric expansion valve to control the cold medium flux through described cooling device according to described outdoor environment temperature.
Wherein, in an embodiment of the present invention, when described outdoor environment temperature is less than or equal to described first preset temperature, described control module controls described electric expansion valve and closes; When described outdoor environment temperature is greater than described first preset temperature and is less than or equal to the second preset temperature, the aperture that described control module controls described electric expansion valve is the first aperture threshold value, and wherein, described second preset temperature is greater than described first preset temperature; When described outdoor environment temperature is greater than described second preset temperature and is less than or equal to the 3rd preset temperature, the aperture that described control module controls described electric expansion valve is the second aperture threshold value, wherein, described 3rd preset temperature is greater than described second preset temperature, and described second aperture threshold value is greater than described first aperture threshold value; When described outdoor environment temperature is greater than described 3rd preset temperature and is less than or equal to the 4th preset temperature, the aperture that described control module controls described electric expansion valve is the 3rd aperture threshold value, wherein, described 4th preset temperature is greater than described 3rd preset temperature, and described 3rd aperture threshold value is greater than described second aperture threshold value; When described outdoor environment temperature is greater than described 4th preset temperature, the aperture that described control module controls described electric expansion valve is the 4th aperture threshold value, and wherein, described 4th aperture threshold value is greater than described 3rd aperture threshold value.
Wherein, in an embodiment of the present invention, described first preset temperature is 50 DEG C, and described second preset temperature is 55 DEG C, and described 3rd preset temperature is 60 DEG C, and described 4th preset temperature is 65 DEG C.
According to one embodiment of present invention, described cooling device comprises cooling copper tube, and described cooling copper tube is looped around on the cylindrical shell of described compressor.
According to one embodiment of present invention, also check valve is provided with at the air inlet of described compressor and the port of export of indoor heat exchanger, the entrance of described check valve is connected with the port of export of described indoor heat exchanger, and the outlet of described check valve is connected with the air inlet of described compressor.
According to one embodiment of present invention, described air-conditioner also comprises: the second temperature sensor being arranged at the port of export of described outdoor heat exchanger, described second temperature sensor is for detecting the outlet temperature of described outdoor heat exchanger, wherein, when described outdoor environment temperature is greater than described second preset temperature, and the outlet temperature of described outdoor heat exchanger is when being greater than the 5th preset temperature, described control module controls outdoor fan in described air-conditioner and runs with most high tap position; When the outlet temperature of described outdoor heat exchanger is less than or equal to the 6th preset temperature, described control module controls described outdoor fan and returns to setting operational taps, and wherein, described 6th preset temperature is less than described 5th preset temperature.
For achieving the above object, the refrigeration control method of the air-conditioner of second aspect present invention embodiment, described air-conditioner is the air-conditioner that first aspect present invention embodiment proposes, and wherein, described method comprises: detect outdoor environment temperature; And when described outdoor environment temperature is greater than the first preset temperature, controls described electric expansion valve and open described cooling device is cooled described compressor, and reduce system pressure when described air-conditioner runs.
According to the refrigeration control method of the air-conditioner of the embodiment of the present invention, cooling device is carried by compressor in air-conditioner, one end of cooling device is connected with outdoor heat exchanger by electric expansion valve, the other end of cooling device is connected with the air entry of compressor, and by the first temperature sensor sensing chamber external environment, and when outdoor environment temperature is greater than the first preset temperature, control electric expansion valve to open cooling device is cooled compressor, and the system pressure reduced when air-conditioner runs, make air-conditioner can running refrigerating under the high temperature conditions, and can make effectively to reduce system running pressure during system overcharge, to enable air-conditioning system continuous firing, improve system reliability, improve Consumer's Experience.
According to one embodiment of present invention, when described outdoor environment temperature is less than or equal to described first preset temperature, controls described electric expansion valve and close.
According to one embodiment of present invention, when described outdoor environment temperature is greater than the first preset temperature, also regulate the aperture of described electric expansion valve to control the cold medium flux through described cooling device according to described outdoor environment temperature.
According to embodiments of the invention, the aperture of described electric expansion valve is regulated according to described outdoor environment temperature, specifically comprise: when described outdoor environment temperature is greater than described first preset temperature and is less than or equal to the second preset temperature, the aperture controlling described electric expansion valve is the first aperture threshold value, wherein, described second preset temperature is greater than described first preset temperature; When described outdoor environment temperature is greater than described second preset temperature and is less than or equal to the 3rd preset temperature, the aperture controlling described electric expansion valve is the second aperture threshold value, wherein, described 3rd preset temperature is greater than described second preset temperature, and described second aperture threshold value is greater than described first aperture threshold value; When described outdoor environment temperature is greater than described 3rd preset temperature and is less than or equal to the 4th preset temperature, the aperture controlling described electric expansion valve is the 3rd aperture threshold value, wherein, described 4th preset temperature is greater than described 3rd preset temperature, and described 3rd aperture threshold value is greater than described second aperture threshold value; When described outdoor environment temperature is greater than described 4th preset temperature, the aperture controlling described electric expansion valve is the 4th aperture threshold value, and wherein, described 4th aperture threshold value is greater than described 3rd aperture threshold value.
Wherein, in an embodiment of the present invention, described first preset temperature is 50 DEG C, and described second preset temperature is 55 DEG C, and described 3rd preset temperature is 60 DEG C, and described 4th preset temperature is 65 DEG C.
According to one embodiment of present invention, when described outdoor environment temperature is greater than described second preset temperature, described control method also comprises: the outlet temperature detecting described outdoor heat exchanger; When the outlet temperature of described outdoor heat exchanger is greater than the 5th preset temperature, controls outdoor fan in described air-conditioner and run with most high tap position; When the outlet temperature of described outdoor heat exchanger is less than or equal to the 6th preset temperature, controls described outdoor fan and return to setting operational taps, wherein, described 6th preset temperature is less than described 5th preset temperature.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the structural representation of air-conditioner according to an embodiment of the invention;
Fig. 2 is the flow chart of the refrigeration control method of air-conditioner according to an embodiment of the invention; And
Fig. 3 is the exemplary plot of the refrigeration control mode of air-conditioner according to an embodiment of the invention.
Reference numeral:
10: outdoor heat exchanger; 20: compressor; 10A: the entrance point of outdoor heat exchanger; 10B: the port of export of outdoor heat exchanger; 20A: the exhaust outlet of compressor; 20B: the air entry of compressor; 50: electric expansion valve; 60: indoor heat exchanger; 60B: the port of export of indoor heat exchanger; 70: check valve; 70A: the entrance of check valve; 70B: the outlet of check valve.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Below with reference to the accompanying drawings air-conditioner according to the embodiment of the present invention and refrigeration control method thereof are described.
Fig. 1 is the structural representation of air-conditioner according to an embodiment of the invention.As shown in Figure 1, this air-conditioner can comprise outdoor heat exchanger 10, compressor 20, first temperature sensor 30 (not shown in figure 1) and control module 40 (not shown in figure 1).Wherein, what the arrow in Fig. 1 represented is when air-conditioner is in refrigerating state, the flow direction of refrigerant in air-conditioner, as shown in Figure 1, the exhaust outlet 20A of compressor 20 is connected with the entrance point 10A of outdoor heat exchanger 10, compressor 20 has cooling device 21 (not shown in figure 1), one end of cooling device 21 (not shown in figure 1) is connected with outdoor heat exchanger 10 by electric expansion valve 50, and the other end of cooling device 21 (not shown in figure 1) is connected with the air entry 20B of compressor 20.In addition, in one embodiment of the invention, cooling device 21 (not shown in figure 1) can comprise cooling copper tube, and cooling copper tube is looped around on the cylindrical shell of compressor 20.Be appreciated that, in an embodiment of the present invention, one end of above-mentioned cooling device 21 can be connected with the somewhere medium position of outdoor heat exchanger 10 by electric expansion valve 50, it should be noted that, the centre position of above-mentioned medium position not necessarily outdoor heat exchanger 10, this link position (i.e. above-mentioned medium position) need set according to concrete actual conditions, and the present invention is not specifically limited.
Particularly, the first temperature sensor 30 can be arranged in the off-premises station of air-conditioner, and the first temperature sensor 30 can be used for detecting outdoor environment temperature.Be appreciated that in an embodiment of the present invention, the first temperature sensor 30 can be outdoor temperature sensor.
Control module 40 controls electric expansion valve 50 and opens cooling device 21 pairs of compressors 20 are cooled when outdoor environment temperature is greater than the first preset temperature, and reduces system pressure when air-conditioner runs.Wherein, in an embodiment of the present invention, the first preset temperature can be 50 DEG C.Particularly, control module 40 can be connected with the first temperature sensor 30 and electric expansion valve 50 respectively, control module 40 is used in outdoor environment temperature when being greater than the first preset temperature (as 50 DEG C), controlling electric expansion valve 50 opens to make the gaseous coolant of outdoor heat exchanger 10 to flow into cooling device 21, cooling device 21 pairs of compressors 20 cool, and reduce system pressure when air-conditioner runs.
Further, in one embodiment of the invention, control module 40 also can regulate the aperture of electric expansion valve 50 to control the cold medium flux through apparatus for supercooling 21 according to outdoor environment temperature.Wherein, in an embodiment of the present invention, control module 40 regulates the specific implementation process of the aperture of electric expansion valve 50 as follows according to outdoor environment temperature: when outdoor environment temperature is less than or equal to the first preset temperature, control module 40 controls electric expansion valve 50 and closes; When outdoor environment temperature is greater than the first preset temperature and is less than or equal to the second preset temperature, the aperture that control module 40 controls electric expansion valve 50 is the first aperture threshold value, and wherein, the second preset temperature is greater than the first preset temperature; When outdoor environment temperature is greater than the second preset temperature and is less than or equal to the 3rd preset temperature, the aperture that control module 40 controls electric expansion valve 50 is the second aperture threshold value, wherein, the 3rd preset temperature is greater than the second preset temperature, and the second aperture threshold value is greater than the first aperture threshold value; When outdoor environment temperature is greater than the 3rd preset temperature and is less than or equal to the 4th preset temperature, the aperture that control module 40 controls electric expansion valve 50 is the 3rd aperture threshold value, wherein, the 4th preset temperature is greater than the 3rd preset temperature, and the 3rd aperture threshold value is greater than the second aperture threshold value; When outdoor environment temperature is greater than the 4th preset temperature, the aperture that control module 40 controls electric expansion valve 50 is the 4th aperture threshold value, and wherein, the 4th aperture threshold value is greater than the 3rd aperture threshold value.
Wherein, in an embodiment of the present invention, the second preset temperature can be 55 DEG C, and the 3rd preset temperature can be 60 DEG C, and the 4th preset temperature can be 65 DEG C.
Thus, by regulating the aperture of electric expansion valve, to control the cold medium flux through apparatus for supercooling, the aperture of electric expansion valve arranges larger, larger by the cold medium flux of electric expansion valve, increased to lower system pressure by the cold medium flux of electric expansion valve, make the gaseous coolant of outdoor heat exchanger flow to the cooling device of compressor by electric expansion valve simultaneously, to make cooling device, compressor is cooled.
Wherein, as shown in Figure 1, in an embodiment of the present invention, check valve 70 is also provided with at the air inlet 20B of the compressor 20 and port of export 60B of indoor heat exchanger 60, the entrance 70A of check valve 70 is connected with the port of export 60B of indoor heat exchanger 60, and the outlet 70B of check valve 70 is connected with the air inlet 20B of compressor 20.Thus, control refrigerant by check valve and flow to compressor by indoor heat exchanger, avoid the phenomenon that adverse current occurs.
Further, in one embodiment of the invention, as shown in Figure 1, this air-conditioner also can comprise: the second temperature sensor 80 (not shown in figure 1), second temperature sensor 80 (not shown in figure 1) can be arranged at the port of export 10B of outdoor heat exchanger 10, and the second temperature sensor 80 can be used for the outlet temperature of sensing chamber's external heat exchanger 10.Wherein, in an embodiment of the present invention, when outdoor environment temperature is greater than the second preset temperature, and when the outlet temperature of outdoor heat exchanger 10 is greater than the 5th preset temperature, control module 40 controls outdoor fan in air-conditioner and runs with most high tap position; When the outlet temperature of outdoor heat exchanger 10 is less than or equal to the 6th preset temperature, control module 40 controls outdoor fan and returns to setting operational taps, and wherein, the 6th preset temperature is less than the 5th preset temperature, if the 5th preset temperature is 68 DEG C, the 6th preset temperature is 64 DEG C.
That is, when outdoor environment temperature T4 is greater than the second preset temperature (as T4>55 DEG C), and the outlet temperature of outdoor heat exchanger 10 that the second temperature sensor 80 detects is when being greater than the 5th preset temperature (as 68 DEG C), control module 40 can control outdoor fan and run with most high tap position (as high wind gear), control in the process that outdoor fan runs with most high tap position in control module 40, when outdoor heat exchanger 10 outlet temperature reduce and lower than the 6th preset temperature (i.e. outlet temperature≤64 DEG C of outdoor heat exchanger 10) time, control module 40 can control the operational taps operation that outdoor fan returns to earlier set.
Thus, force most high tap position to run with the outlet temperature reducing outdoor heat exchanger, system pressure is reduced by outdoor fan, when the system pressure drops, control outdoor fan returns to setting operational taps.
According to the air-conditioner of the embodiment of the present invention, cooling device is carried by compressor, one end of cooling device is connected with outdoor heat exchanger by electric expansion valve, the other end of cooling device is connected with the air entry of compressor, and by the first temperature sensor sensing chamber external environment, and control electric expansion valve when outdoor environment temperature is greater than the first preset temperature by control module and open cooling device is cooled compressor, and the system pressure reduced when air-conditioner runs, make air-conditioner can running refrigerating under the high temperature conditions, and can make effectively to reduce system running pressure during system overcharge, to enable air-conditioning system continuous firing, improve system reliability, improve Consumer's Experience.
In order to realize above-described embodiment, the invention allows for a kind of refrigeration control method of air-conditioner.
Fig. 2 is the flow chart of the refrigeration control method of air-conditioner according to an embodiment of the invention.It should be noted that, air-conditioner in the embodiment of the present invention can be the air-conditioner of any one embodiment above-mentioned, above-mentioned air-conditioner can comprise electric expansion valve, outdoor heat exchanger and compressor, compressor can have cooling device, one end of cooling device is connected with outdoor heat exchanger by electric expansion valve, and the other end of cooling device is connected with the air entry of compressor.
As shown in Figure 2, the refrigeration control method of this air-conditioner can comprise:
S201, detects outdoor environment temperature.
Particularly, outdoor environment temperature is detected by the first temperature sensor in air-conditioner.Wherein, the first temperature sensor can be outdoor temperature sensor.
S202, when outdoor environment temperature is greater than the first preset temperature, controls electric expansion valve and opens cooling device is cooled compressor, and reduce system pressure when air-conditioner runs.
Wherein, in an embodiment of the present invention, the first preset temperature can be 50 DEG C.
Particularly, when outdoor environment temperature is greater than preset temperature (as 50 DEG C), can control electric expansion valve opens to make the gaseous coolant of outdoor heat exchanger to flow into the cooling device of compressor in air-conditioner, cooling device is cooled compressor by gaseous coolant, and by opening electric expansion valve to reduce system pressure when air-conditioner runs.
In an embodiment of the present invention, when outdoor environment temperature is less than or equal to the first preset temperature, controls electric expansion valve and close.That is, when outdoor environment temperature is less than or equal to the first preset temperature, electric expansion valve is failure to actuate maintenance closed condition, and namely now air-conditioner is not yet in high-temperature refrigeration state.
Further, in an embodiment of the present invention, when outdoor environment temperature is greater than the first preset temperature, also the aperture of electric expansion valve can be regulated to control the cold medium flux through apparatus for supercooling according to outdoor environment temperature.Specifically, in an embodiment of the present invention, specific implementation process according to the aperture of outdoor environment temperature adjustment electric expansion valve can be as follows: when outdoor environment temperature is greater than the first preset temperature and is less than or equal to the second preset temperature, the aperture controlling electric expansion valve is the first aperture threshold value, wherein, the second preset temperature is greater than the first preset temperature; When outdoor environment temperature is greater than the second preset temperature and is less than or equal to the 3rd preset temperature, the aperture controlling electric expansion valve is the second aperture threshold value, and wherein, the 3rd preset temperature is greater than the second preset temperature, and the second aperture threshold value is greater than the first aperture threshold value; When outdoor environment temperature is greater than the 3rd preset temperature and is less than or equal to the 4th preset temperature, the aperture controlling electric expansion valve is the 3rd aperture threshold value, and wherein, the 4th preset temperature is greater than the 3rd preset temperature, and the 3rd aperture threshold value is greater than the second aperture threshold value; When outdoor environment temperature is greater than the 4th preset temperature, the aperture controlling electric expansion valve is the 4th aperture threshold value, and wherein, the 4th aperture threshold value is greater than the 3rd aperture threshold value.
Wherein, in an embodiment of the present invention, the second preset temperature can be 55 DEG C, and the 3rd preset temperature can be 60 DEG C, and the 4th preset temperature can be 65 DEG C.
Further, in one embodiment of the invention, when outdoor environment temperature is greater than the second preset temperature, this refrigeration control method also can comprise: the outlet temperature of sensing chamber's external heat exchanger; When the outlet temperature of outdoor heat exchanger is greater than the 5th preset temperature, controls outdoor fan in air-conditioner and run with most high tap position; When the outlet temperature of outdoor heat exchanger is less than or equal to the 6th preset temperature, control outdoor fan and return to setting operational taps, wherein, the 6th preset temperature is less than the 5th preset temperature, and if the 5th preset temperature is 68 DEG C, the 6th preset temperature is 64 DEG C.
That is, when outdoor environment temperature T4 is greater than the second preset temperature (as T4>55 DEG C), and the outlet temperature of outdoor heat exchanger that the second temperature sensor detects is when being greater than the 5th preset temperature (as 68 DEG C), outdoor fan can be controlled run with most high tap position (as high wind gear), controlling in the process that outdoor fan runs with most high tap position, when outdoor heat exchanger outlet temperature reduce and lower than the 6th preset temperature (i.e. outlet temperature≤64 DEG C of outdoor heat exchanger) time, the operational taps operation that outdoor fan returns to earlier set can be controlled.
In order to make those skilled in the art more can understand refrigeration control mode of the present invention, be described below in conjunction with Fig. 3.
For example, as shown in Figure 3, when outdoor environment temperature T4 being detected, first can judge whether outdoor environment temperature T4 is greater than the first preset temperature (as 50 DEG C) (S301), if outdoor environment temperature T4≤50 DEG C, then control electric expansion valve is closed is failure to actuate (S302); If outdoor environment temperature T4>50 DEG C, then along with the rising of outdoor temperature, system pressure rises, and system high side pressure is easy to exceed the compressor scope of application, thus causes compressor stop jumping, system cisco unity malfunction.The refrigeration control method of the embodiment of the present invention by with under type, solves compressor stop jumping problem:
(1) most high tap position is forced to run by the outdoor fan controlled in air-conditioner, system pressure is reduced, when system pressure reduces, control the operational taps that outdoor fan returns to earlier set, control program is as follows: first can judge whether outdoor environment temperature T4 is greater than the second preset temperature, whether the outlet temperature T3 of outdoor heat exchanger is greater than the 5th preset temperature (S303), when outdoor environment temperature T4 is greater than the second preset temperature (as T4>55 DEG C), and when the outlet temperature T3 detecting outdoor heat exchanger is greater than the 5th preset temperature (as T3>68 DEG C), controlling outdoor fan forces most high tap position (as high wind gear) to run (S304), when detecting that the outlet temperature T3 of outdoor heat exchanger reduces and is low to moderate below the 6th preset temperature, namely during T3≤64 DEG C, control outdoor fan and return to setting operational taps, be appreciated that, if T4 is less than or equal to the second preset temperature (as T4≤55 DEG C), then controlling outdoor fan keeps current operational taps to run, if or T4>55 DEG C and T3≤68 DEG C, then controlling outdoor fan keeps current operational taps to run (S305),
(2) by regulating the aperture of electric expansion valve, the aperture of electric expansion valve arranges larger, increased by the refrigerant gaseous state flow of electric expansion valve, lower system pressure, by electric expansion valve refrigerant gaseous state and then cooled compressor by compressor cooling, control as follows: the outdoor temperature scope that can judge its correspondence according to outdoor environment temperature, and the aperture size of corresponding electric expansion valve can be determined according to this outdoor temperature scope, namely, T4 is at (50 DEG C, 55 DEG C] scope, electronic expansion valve opening CPMV1; T4 (55 DEG C, 60 DEG C] scope, electronic expansion valve opening CPMV2; T4 (60 DEG C, 65 DEG C] scope, electronic expansion valve opening CPMV3; T4 is greater than 65 DEG C of scopes, electronic expansion valve opening CPMV4, wherein, and CPMV1<CPMV2<CPMV3LEssT.LTssT.L TCPMV4 (S306).
According to the refrigeration control method of the air-conditioner of the embodiment of the present invention, cooling device is carried by compressor in air-conditioner, one end of cooling device is connected with outdoor heat exchanger by electric expansion valve, the other end of cooling device is connected with the air entry of compressor, and by the first temperature sensor sensing chamber external environment, and when outdoor environment temperature is greater than the first preset temperature, control electric expansion valve to open cooling device is cooled compressor, and the system pressure reduced when air-conditioner runs, make air-conditioner can running refrigerating under the high temperature conditions, and can make effectively to reduce system running pressure during system overcharge, to enable air-conditioning system continuous firing, improve system reliability, improve Consumer's Experience.
In sum, the present invention is on the basis of existing air-conditioner and refrigeration control method thereof, by on the compressor in air-conditioner, cooling device is set, one end of cooling device is connected with outdoor heat exchanger by electric expansion valve, the other end of cooling device is connected with the air entry of compressor, by regulating electronic expansion valve opening control through the flow of refrigerant, lower system pressure cooling compressor simultaneously, and the port of export of compressor air suction mouth and indoor heat exchanger is provided with check valve, the entrance of check valve is connected with the port of export of indoor heat exchanger, the outlet of check valve is connected with the air inlet of compressor, prevent adverse current, outdoor heat exchanger port of export set temperature sensor is to gather the outlet temperature of outdoor heat exchanger, air-conditioner arranges outdoor temperature sensor to gather outdoor temperature, and pass through the refrigeration control method of the invention described above embodiment, can freeze under the high temperature conditions to realize air-conditioner of the present invention, and effectively can reduce system running pressure when system overcharge, make air-conditioning system can continuous firing.
In describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logic function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this description, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic installation) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), read-only storage (ROM), erasablely edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk read-only storage (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logic function to data-signal, there is the special IC of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be read-only storage, disk or CD etc.Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (13)
1. an air-conditioner, is characterized in that, comprising:
Outdoor heat exchanger;
Compressor, the exhaust outlet of described compressor is connected with the entrance point of described outdoor heat exchanger, described compressor has cooling device, and one end of described cooling device is connected with described outdoor heat exchanger by electric expansion valve, and the other end of described cooling device is connected with the air entry of described compressor;
First temperature sensor, described first temperature sensor is for detecting outdoor environment temperature; And
Control module, described control module controls described electric expansion valve and opens described cooling device is cooled described compressor when described outdoor environment temperature is greater than the first preset temperature, and reduces system pressure when described air-conditioner runs.
2. air-conditioner as claimed in claim 1, is characterized in that, described control module also regulates the aperture of described electric expansion valve to control the cold medium flux through described cooling device according to described outdoor environment temperature.
3. air-conditioner as claimed in claim 2, is characterized in that, wherein,
When described outdoor environment temperature is less than or equal to described first preset temperature, described control module controls described electric expansion valve and closes;
When described outdoor environment temperature is greater than described first preset temperature and is less than or equal to the second preset temperature, the aperture that described control module controls described electric expansion valve is the first aperture threshold value, and wherein, described second preset temperature is greater than described first preset temperature;
When described outdoor environment temperature is greater than described second preset temperature and is less than or equal to the 3rd preset temperature, the aperture that described control module controls described electric expansion valve is the second aperture threshold value, wherein, described 3rd preset temperature is greater than described second preset temperature, and described second aperture threshold value is greater than described first aperture threshold value;
When described outdoor environment temperature is greater than described 3rd preset temperature and is less than or equal to the 4th preset temperature, the aperture that described control module controls described electric expansion valve is the 3rd aperture threshold value, wherein, described 4th preset temperature is greater than described 3rd preset temperature, and described 3rd aperture threshold value is greater than described second aperture threshold value;
When described outdoor environment temperature is greater than described 4th preset temperature, the aperture that described control module controls described electric expansion valve is the 4th aperture threshold value, and wherein, described 4th aperture threshold value is greater than described 3rd aperture threshold value.
4. air-conditioner as claimed in claim 1, it is characterized in that, described cooling device comprises cooling copper tube, and described cooling copper tube is looped around on the cylindrical shell of described compressor.
5. air-conditioner as claimed in claim 1, it is characterized in that, also be provided with check valve at the air inlet of described compressor and the port of export of indoor heat exchanger, the entrance of described check valve is connected with the port of export of described indoor heat exchanger, and the outlet of described check valve is connected with the air inlet of described compressor.
6. air-conditioner as claimed in claim 3, it is characterized in that, described first preset temperature is 50 DEG C, and described second preset temperature is 55 DEG C, and described 3rd preset temperature is 60 DEG C, and described 4th preset temperature is 65 DEG C.
7. air-conditioner as claimed in claim 3, is characterized in that, also comprise:
Be arranged at the second temperature sensor of the port of export of described outdoor heat exchanger, described second temperature sensor for detecting the outlet temperature of described outdoor heat exchanger, wherein,
When described outdoor environment temperature is greater than described second preset temperature, and when the outlet temperature of described outdoor heat exchanger is greater than the 5th preset temperature, described control module controls outdoor fan in described air-conditioner and runs with most high tap position;
When the outlet temperature of described outdoor heat exchanger is less than or equal to the 6th preset temperature, described control module controls described outdoor fan and returns to setting operational taps, and wherein, described 6th preset temperature is less than described 5th preset temperature.
8. a refrigeration control method for air-conditioner as claimed in claim 1, is characterized in that, comprises the following steps:
Detect outdoor environment temperature; And
When described outdoor environment temperature is greater than the first preset temperature, controls described electric expansion valve and open described cooling device is cooled described compressor, and reduce system pressure when described air-conditioner runs.
9. method as claimed in claim 8, is characterized in that, when described outdoor environment temperature is less than or equal to described first preset temperature, controls described electric expansion valve and closes.
10. method as claimed in claim 8, is characterized in that, when described outdoor environment temperature is greater than the first preset temperature, also regulates the aperture of described electric expansion valve to control the cold medium flux through described cooling device according to described outdoor environment temperature.
11. methods as claimed in claim 10, is characterized in that, regulate the aperture of described electric expansion valve, specifically comprise according to described outdoor environment temperature:
When described outdoor environment temperature is greater than described first preset temperature and is less than or equal to the second preset temperature, the aperture controlling described electric expansion valve is the first aperture threshold value, and wherein, described second preset temperature is greater than described first preset temperature;
When described outdoor environment temperature is greater than described second preset temperature and is less than or equal to the 3rd preset temperature, the aperture controlling described electric expansion valve is the second aperture threshold value, wherein, described 3rd preset temperature is greater than described second preset temperature, and described second aperture threshold value is greater than described first aperture threshold value;
When described outdoor environment temperature is greater than described 3rd preset temperature and is less than or equal to the 4th preset temperature, the aperture controlling described electric expansion valve is the 3rd aperture threshold value, wherein, described 4th preset temperature is greater than described 3rd preset temperature, and described 3rd aperture threshold value is greater than described second aperture threshold value;
When described outdoor environment temperature is greater than described 4th preset temperature, the aperture controlling described electric expansion valve is the 4th aperture threshold value, and wherein, described 4th aperture threshold value is greater than described 3rd aperture threshold value.
12. methods as claimed in claim 11, it is characterized in that, described first preset temperature is 50 DEG C, and described second preset temperature is 55 DEG C, and described 3rd preset temperature is 60 DEG C, and described 4th preset temperature is 65 DEG C.
13. methods as claimed in claim 11, is characterized in that, when described outdoor environment temperature is greater than described second preset temperature, also comprise:
Detect the outlet temperature of described outdoor heat exchanger;
When the outlet temperature of described outdoor heat exchanger is greater than the 5th preset temperature, controls outdoor fan in described air-conditioner and run with most high tap position;
When the outlet temperature of described outdoor heat exchanger is less than or equal to the 6th preset temperature, controls described outdoor fan and return to setting operational taps, wherein, described 6th preset temperature is less than described 5th preset temperature.
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| CN105222445A (en) * | 2015-10-30 | 2016-01-06 | Tcl空调器(中山)有限公司 | The control method of electric expansion valve, device and air-conditioner set and control method thereof |
| CN105465975A (en) * | 2015-12-15 | 2016-04-06 | 珠海格力电器股份有限公司 | Air-conditioner and control method thereof |
| CN106225275A (en) * | 2016-09-18 | 2016-12-14 | 广东美的制冷设备有限公司 | A kind of air-conditioner refrigerating system and control method thereof |
| CN106482303A (en) * | 2016-11-25 | 2017-03-08 | 广州华凌制冷设备有限公司 | A kind of air-conditioner and its refrigeration control method |
| CN107192179A (en) * | 2017-06-05 | 2017-09-22 | 广东美的暖通设备有限公司 | The control method and computer-readable recording medium of air conditioner and electric expansion valve |
| CN114608180A (en) * | 2022-03-15 | 2022-06-10 | 广东开利暖通空调股份有限公司 | Control method of outdoor unit electronic expansion valve |
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