CN109028452B - Air conditioning system and refrigerant heat dissipation device and method thereof - Google Patents

Air conditioning system and refrigerant heat dissipation device and method thereof Download PDF

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Publication number
CN109028452B
CN109028452B CN201810635731.1A CN201810635731A CN109028452B CN 109028452 B CN109028452 B CN 109028452B CN 201810635731 A CN201810635731 A CN 201810635731A CN 109028452 B CN109028452 B CN 109028452B
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refrigerant
temperature
control valve
heat exchanger
refrigerant heat
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CN109028452A (en
Inventor
张宇晟
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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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
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2515—Flow valves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioning system and a refrigerant heat dissipation device and a method thereof, wherein the device comprises: the refrigerant heat exchanger is used for radiating the heat of the part to be radiated; the first refrigerant pipeline is used for conveying the refrigerant which flows out of the refrigerating system of the air conditioning system to the refrigerant heat exchanger; the second refrigerant pipeline is used for conveying the refrigerant flowing out of the refrigerant heat exchanger to the refrigerating system; the first control valve is arranged on the first refrigerant pipeline; the second control valve is arranged on the second refrigerant pipeline; the first temperature detection unit is used for detecting the temperature of the refrigerant at the first port of the refrigerant heat exchanger; a second temperature detection unit for detecting the temperature of the member to be heat-radiated; and the control unit is used for adjusting the opening of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and adjusting the opening of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the part to be cooled, so that the problems of condensation and insufficient cooling capacity can be solved.

Description

Air conditioning system and refrigerant heat dissipation device and method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant heat dissipation device of an air conditioning system, the air conditioning system with the refrigerant heat dissipation device and a refrigerant heat dissipation method of the air conditioning system.
Background
With the increasing functions of air conditioners, power devices such as Insulated Gate Bipolar Transistor (IGBT) power devices carried by the air conditioners are increasing, and the heat productivity of the electronic control box is increasing.
In the related art, aiming at the problem of large heat productivity of the electric control box, a method for solving the problem is wind cooling and refrigerant cooling. The air cooling needs to additionally add a cooling fan and an air duct in the air conditioner, and occupies a larger space. In the cooling of the cooling medium, the state difference of the cooling medium at the inlet of the cooling plate is large, and if the temperature of the cooling medium is low, the cooling medium can be condensed on some electronic devices to burn out the electric control plate; if the temperature of the cooling refrigerant is high, the cooling capacity is insufficient, and the reliability is affected due to the overhigh temperature of the electric control box.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a refrigerant heat sink of an air conditioning system, which can solve the problems of condensation and insufficient cooling capacity caused by cooling with refrigerant in the related art by adjusting the opening degrees of a first control valve and a second control valve.
A second object of the present invention is to provide an air conditioning system.
The third objective of the present invention is to provide a refrigerant heat dissipation method for an air conditioning system.
A fourth object of the invention is to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a refrigerant heat dissipation device of an air conditioning system, including: the refrigerant heat exchanger is arranged opposite to a part to be cooled of the air conditioning system and used for cooling the part to be cooled; the first refrigerant pipeline is connected with a first port of the refrigerant heat exchanger and used for conveying refrigerant which flows out of a refrigerating system of the air conditioning system to the refrigerant heat exchanger; the second refrigerant pipeline is connected with a second port of the refrigerant heat exchanger and is used for conveying the refrigerant flowing out of the refrigerant heat exchanger to the refrigerating system; the first control valve is arranged on the first refrigerant pipeline; the second control valve is arranged on the second refrigerant pipeline; the first temperature detection unit is used for detecting the temperature of the refrigerant at the first port of the refrigerant heat exchanger; the second temperature detection unit is used for detecting the temperature of the part to be cooled; the control unit is respectively connected with the first control valve, the second control valve, the first temperature detection unit and the second temperature detection unit, and is used for adjusting the opening of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and adjusting the opening of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the part to be cooled.
According to the refrigerant heat dissipation device of the air conditioning system, the refrigerant heat exchanger is arranged relative to a part to be dissipated of the air conditioning system so as to dissipate heat of the part to be dissipated, the first refrigerant pipeline is provided with the first control valve, and the second refrigerant pipeline is provided with the second control valve. The device detects the refrigerant temperature of the first port of the refrigerant heat exchanger in real time through the first temperature detection unit, and simultaneously detects the temperature of the heat dissipation part through the second temperature detection unit in real time, so that the control unit adjusts the opening degree of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger, adjusts the opening degree of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the heat dissipation part, and the problems of condensation and insufficient cooling capacity caused by refrigerant cooling in the related art can be solved.
In addition, the refrigerant heat dissipation device of the air conditioning system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the control unit is configured to control the opening degree of the second control valve to decrease when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is less than or equal to a first temperature threshold value and lasts for a preset time, and the temperature of the component to be cooled is less than or equal to a preset lower limit temperature.
According to an embodiment of the invention, the control unit is further configured to control the opening degree of the second control valve to reach a maximum opening degree when the temperature of the component to be cooled is greater than or equal to a preset upper limit temperature, wherein the preset upper limit temperature is greater than the preset lower limit temperature.
According to an embodiment of the present invention, the control unit is configured to control the opening degree of the first control valve to decrease when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is greater than a second temperature threshold; when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is equal to the second temperature threshold value, controlling the opening degree of the first control valve to be kept unchanged; when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is smaller than the second temperature threshold value, controlling the opening degree of the first control valve to increase; wherein the second temperature threshold is greater than the first temperature threshold.
According to an embodiment of the present invention, before the opening degrees of the first control valve and the second control valve are adjusted, the control unit is further configured to, after the air conditioning system is powered on, control the opening degrees of the first control valve and the second control valve to be at the maximum opening degrees until a compressor of the air conditioning system is started for a second preset time.
In order to achieve the above object, a second aspect of the present invention provides an air conditioning system, which includes the refrigerant heat dissipation device of the air conditioning system.
According to the air conditioning system provided by the embodiment of the invention, through the refrigerant heat dissipation device of the air conditioning system, the problems of condensation and insufficient cooling capacity caused by cooling by adopting a refrigerant in the related art can be solved by adjusting the opening degrees of the first control valve and the second control valve.
In order to achieve the above object, a third embodiment of the present invention provides a refrigerant heat dissipation method for an air conditioning system, in which a refrigerant heat dissipation device of the air conditioning system includes a refrigerant heat exchanger, a first refrigerant pipeline, a second refrigerant pipeline, a first control valve, and a second control valve, the refrigerant heat exchanger is disposed opposite to a component to be heat dissipated of the air conditioning system, the refrigerant heat exchanger is configured to dissipate heat of the component to be heat dissipated, the first refrigerant pipeline is connected to a first port of the refrigerant heat exchanger, the first refrigerant pipeline is configured to convey a refrigerant flowing out of a refrigeration system of the air conditioning system to the refrigerant heat exchanger, the second refrigerant pipeline is connected to a second port of the refrigerant heat exchanger, the second refrigerant pipeline is configured to convey the refrigerant flowing out of the refrigerant heat exchanger to the refrigeration system, and the first control valve is disposed on the first refrigerant pipeline, the second control valve is arranged on the second refrigerant pipeline, wherein the method comprises the following steps: detecting the temperature of a refrigerant at a first port of the refrigerant heat exchanger; detecting the temperature of the part to be radiated; and adjusting the opening degree of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger, and adjusting the opening degree of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the part to be cooled.
According to the refrigerant heat dissipation method of the air conditioning system, the temperature of the refrigerant at the first port of the refrigerant heat exchanger is detected in real time, the temperature of the part to be dissipated is detected in real time, the opening degree of the first control valve is adjusted according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger, and the opening degree of the second control valve is adjusted according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the part to be dissipated. The method can solve the problems of condensation and insufficient cooling capacity caused by cooling by adopting a refrigerant in the related art by adjusting the opening degrees of the first control valve and the second control valve.
In addition, the refrigerant heat dissipation method of the air conditioning system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the adjusting the opening degree of the second control valve according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the component to be cooled includes: and when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is less than or equal to a first temperature threshold value and lasts for a preset time, and the temperature of the part to be cooled is less than or equal to a preset lower limit temperature, controlling the opening of the second control valve to be reduced.
According to an embodiment of the present invention, the adjusting the opening degree of the second control valve according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the component to be heat-dissipated further includes: and when the temperature of the part to be cooled is greater than or equal to a preset upper limit temperature, controlling the opening of the second control valve to reach the maximum opening, wherein the preset upper limit temperature is greater than the preset lower limit temperature.
According to an embodiment of the present invention, the adjusting the opening degree of the first control valve according to the refrigerant temperature at the first port of the refrigerant heat exchanger includes: when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is greater than a second temperature threshold value, controlling the opening degree of the first control valve to be reduced; when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is equal to the second temperature threshold value, controlling the opening degree of the first control valve to be kept unchanged; when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is smaller than the second temperature threshold value, controlling the opening degree of the first control valve to increase; wherein the second temperature threshold is greater than the first temperature threshold.
According to an embodiment of the present invention, before the adjusting the opening degrees of the first control valve and the second control valve, the method further includes: and after the air conditioning system is powered on, controlling the opening degrees of the first control valve and the second control valve to be in the maximum opening degree until a compressor of the air conditioning system is started for a second preset time.
In order to achieve the above object, a non-transitory computer readable storage medium is provided in a fourth aspect of the present invention, and a refrigerant heat dissipation program of an air conditioning system is stored on the non-transitory computer readable storage medium, and when the program is executed by a processor, the method for cooling a refrigerant of the air conditioning system is implemented.
According to the non-transitory computer readable storage medium of the embodiment of the invention, through the refrigerant heat dissipation method of the air conditioning system, the problems of condensation and insufficient cooling capacity caused by refrigerant cooling in the related art can be solved by adjusting the opening degrees of the first control valve and the second control valve.
Drawings
Fig. 1 is a schematic structural diagram of a refrigerant heat dissipation device of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a refrigerant heat exchanger according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of adjusting a second control valve according to one embodiment of the present disclosure;
FIG. 4 is a flow chart of a method of adjusting a first control valve according to one embodiment of the present disclosure; and
fig. 5 is a flowchart illustrating a refrigerant heat dissipation method of an air conditioning system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a refrigerant heat dissipation device of an air conditioning system, an air conditioning system having the refrigerant heat dissipation device, and a refrigerant heat dissipation method of the air conditioning system according to embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a refrigerant heat dissipation device of an air conditioning system according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a refrigerant heat exchanger according to an embodiment of the present invention.
As shown in fig. 1, an air conditioning system according to an embodiment of the present invention may include a compressor 01, a condenser 02, a throttle valve 03, an evaporator 04, and a gas-liquid separator 05, which are connected in sequence. When the air conditioning system operates in a refrigeration mode, the compressor 01 sucks a low-pressure gaseous refrigerant from the gas-liquid separator 05, compresses the low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant, reduces the volume of the gaseous refrigerant, increases the pressure of the gaseous refrigerant, sends the gaseous refrigerant into the condenser 02, releases heat in the condenser 02, condenses the gaseous refrigerant into a high-pressure liquid refrigerant, throttles and reduces the pressure of the liquid refrigerant by the throttle valve 03, becomes a low-pressure liquid refrigerant, enters the evaporator 04, absorbs heat in the evaporator 04, evaporates the low-pressure gaseous refrigerant into the low-pressure gaseous refrigerant, separates the gaseous refrigerant from the liquid refrigerant by the gas-liquid separator 05, and returns the separated gaseous refrigerant to a gas return port of the compressor 01, so that the refrigeration cycle is completed.
As shown in fig. 1 and 2, the refrigerant heat dissipating device of the air conditioning system according to the embodiment of the present invention may include: the refrigerant heat exchanger 10, the first refrigerant pipeline 20, the second refrigerant pipeline 30, the first control valve 40, the second control valve 50, the first temperature detecting unit 60, the second temperature detecting unit 70 and the control unit (not shown in the figure).
For example, the component to be cooled described in this embodiment may be a power device such as an IGBT power device in an electronic control box, the electronic control box may be fixed to the refrigerant heat exchanger 10 by a screw, and the refrigerant heat exchanger 10 is used to cool the component to be cooled. The first refrigerant pipeline 20 is connected to a first port of the refrigerant heat exchanger 10, and the first refrigerant pipeline 20 is configured to convey a refrigerant, which flows out of a refrigeration system of the air conditioning system, to the refrigerant heat exchanger 10. The second refrigerant pipeline 30 is connected to a second port of the refrigerant heat exchanger 10, and the second refrigerant pipeline 30 is used for conveying the refrigerant flowing out of the refrigerant heat exchanger 10 to the refrigeration system. The first control valve 40 is disposed on the first refrigerant line 20, and the second control valve 50 is disposed on the second refrigerant line 30. The first temperature detecting unit 60, such as a bulb, is used to detect the temperature of the refrigerant at the first port of the refrigerant heat exchanger 10, and the second temperature detecting unit 70, such as a bulb, is used to detect the temperature of the component to be heat-dissipated.
And the control unit is respectively connected with the first control valve 40, the second control valve 50, the first temperature detection unit 60 and the second temperature detection unit 70, and is configured to adjust the opening degree of the first control valve 40 according to the refrigerant temperature at the first port of the refrigerant heat exchanger 10, and adjust the opening degree of the second control valve 50 according to the refrigerant temperature at the first port of the refrigerant heat exchanger 10 and the temperature of the component to be heat-dissipated.
With reference to fig. 1, when the air conditioning system operates in the cooling mode, the gaseous refrigerant discharged from the compressor 01 is sent to the condenser 02, the gaseous refrigerant is cooled and condensed into a liquid refrigerant in the condenser 02, after the liquid refrigerant flows out of the condenser 02, a part of the liquid refrigerant is throttled and depressurized by the first control valve 40, enters the refrigerant heat exchanger 10 to be evaporated and absorbed to dissipate heat of the part to be dissipated, then flows through the second control valve 50 and is throttled and depressurized by the throttle valve 03, and another part of the liquid refrigerant is collected in front of the evaporator 04, the unevaporated liquid refrigerant is not wasted and continuously flows into the evaporator 04 to absorb heat. Therefore, the invention detects the temperature of the refrigerant at the first port of the refrigerant heat exchanger 10 in real time through the first temperature detection unit 60, and detects the temperature of the component to be cooled in real time through the second temperature detection unit 70, so that the control unit adjusts the opening of the first control valve 40 according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger 10, and adjusts the opening of the second control valve 50 according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger 10 and the temperature of the component to be cooled, thereby solving the problems of insufficient condensation and cooling capacity caused by cooling of the refrigerant in the related art, avoiding the electric control board from being burnt out and the component to be cooled from being too high in temperature, and improving the working reliability of the component to be cooled.
A method for adjusting the opening of the second control valve 50 by the control unit according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger 10 and the temperature of the component to be heat-dissipated will be described with reference to the embodiment of the present invention.
In an embodiment of the invention, the control unit is configured to control the opening degree of the second control valve 50 to decrease when the temperature of the refrigerant at the first port of the refrigerant heat exchanger 10 is less than or equal to a first temperature threshold value and lasts for a preset time, and the temperature of the component to be cooled is less than or equal to a preset lower limit temperature. The preset time and the preset lower limit temperature can be set according to actual conditions.
Further, the control unit is further configured to control the opening degree of the second control valve 50 to reach the maximum opening degree when the temperature of the component to be heat-dissipated is greater than or equal to the preset upper limit temperature. Wherein the preset upper limit temperature is greater than the preset lower limit temperature.
Continuing to refer to fig. 1, because the low pressure of the second port connection system of refrigerant heat exchanger 10, if the system low pressure is too low, then the refrigerant that can lead to whole refrigerant heat exchanger 10 inner tube way all is in the low pressure, and the temperature is low, and the condensation risk increases greatly, if reduce second control valve 50's aperture this moment, then the low pressure refrigerant of refrigerant heat exchanger 10 inner tube way keeps certain pressure drop, risees refrigerant heat exchanger 10's temperature, reduces the condensation risk.
Specifically, during the operation of the air conditioning system, the first temperature detection unit 60 detects the temperature T1 of the refrigerant at the first port of the refrigerant heat exchanger 10 in real time, and compares the temperature T1 with the first temperature threshold a1, and the second temperature detection unit 70 detects the temperature T2 of the component to be cooled in real time, and compares the temperature T2 with the preset lower limit temperature x1 and the preset upper limit temperature x 2. If T1 is not less than a1, the preset time is tmin, and T2 is not less than x1, the condensation risk is indicated, at this time, the control unit controls the opening degree of the second control valve 50 to be reduced, and if the opening degree is reduced by p steps, the flow rate of the refrigerant passing through the second control valve 50 is reduced, so that the condensation risk is reduced; if T2 is more than or equal to x2, no condensation risk exists, and the control unit controls the opening of the second control valve 50 to directly reach the maximum opening; if x1 < T2 < x2, the control unit controls the opening degree of the second control valve 50 to remain unchanged. In order to ensure the flow rate of the refrigerant of the refrigeration system, the opening degree of the second control valve 50 is set to a minimum opening degree, and the minimum opening degree can be obtained through experiments.
Further, as shown in fig. 3, the adjusting method of the second control valve of the embodiment of the present invention may include the steps of:
and S301, detecting the temperature T1 of the refrigerant at the first port of the refrigerant heat exchanger in real time, comparing the temperature T1 with a1, detecting the temperature T2 of a part to be cooled in real time, and comparing the temperature T2 with x1 and x 2. Wherein x1 < x 2.
S302, whether T1 is more than or equal to a1 and tmin continues and T2 is more than or equal to x1 is judged. If yes, go to step S303; if not, step S304 is performed.
And S303, controlling the opening of the second control valve to be reduced by P steps.
S304, determine whether T2 ≧ x2 holds. If yes, go to step S305; if not, step S306 is performed.
And S305, controlling the opening degree of the second control valve to be directly adjusted to the maximum opening degree.
S306, x1 < T2 < x2, wherein the opening degree of the second control valve is controlled to be kept unchanged.
A method for adjusting the opening degree of the first control valve 40 according to the refrigerant temperature at the first port of the refrigerant heat exchanger 10 by the control unit will be described below with reference to an embodiment of the present invention.
In an embodiment of the present invention, the control unit is configured to control the opening degree of the first control valve 40 to decrease when the refrigerant temperature at the first port of the refrigerant heat exchanger 10 is greater than a second temperature threshold; when the refrigerant temperature of the first port of the refrigerant heat exchanger 10 is equal to the second temperature threshold, controlling the opening degree of the first control valve 40 to be kept unchanged; when the refrigerant temperature at the first port of the refrigerant heat exchanger 10 is less than the second temperature threshold, the opening degree of the first control valve 40 is controlled to be increased. Wherein the second temperature threshold is greater than the first temperature threshold.
Specifically, during the operation of the air conditioning system, the first temperature detection unit 60 detects the temperature T1 of the refrigerant at the first port of the refrigerant heat exchanger 10 in real time, and compares the temperature T1 with the second temperature threshold a 2. If T1 > a2, the control unit decreases the opening of the first control valve 40 to increase the throttling effect and decrease T1; if T1 < a2, the control unit increases the opening of the first control valve 40 to reduce the throttling effect and raise T1; if T1 is a2, the control unit controls the opening degree of the first control valve 40 to be maintained. In order to ensure the flow rate of the refrigerant of the refrigeration system, the opening degree of the first control valve 40 is set to a minimum opening degree, and the minimum opening degree can be obtained through experiments.
Further, as shown in fig. 4, the adjusting method of the first control valve of the embodiment of the present invention may include the steps of:
and S401, detecting the temperature T1 of the refrigerant at the first port of the refrigerant heat exchanger in real time, and comparing the temperature T1 with a 2.
S402, determine whether T1 > a2 holds. If yes, go to step S403; if not, step S404 is performed.
And S403, controlling the opening degree of the first control valve to be reduced.
S404, determines whether T1 is satisfied or not, i.e., a 2. If yes, go to step S405; if not, step S406 is performed.
And S405, controlling the opening degree of the first control valve to be kept.
S406, T1 is more than a2, and the opening degree of the first control valve is controlled to be large.
Therefore, the embodiment of the invention can solve the problems of condensation and insufficient cooling capacity caused by cooling by adopting a refrigerant in the related art by adjusting the opening degrees of the first control valve and the second control valve, so as to avoid burning out of the electric control plate and overhigh temperature of the part to be radiated, and improve the working reliability of the part to be radiated.
According to an embodiment of the present invention, before the adjusting of the opening degrees of the first and second control valves 40 and 50, the control unit is further configured to control the opening degrees of the first and second control valves 40 and 50 to be at the maximum opening degrees after the air conditioning system is powered on until the compressor 01 of the air conditioning system is started for a second preset time. The second preset time may be set according to an actual situation, and may be 2min, for example.
Specifically, after the air conditioning system is powered on, the control unit controls the first control valve 40 and the second control valve 50 to be opened to the maximum opening degree, and adjusts the opening degree of the first control valve 40 according to the refrigerant temperature T1 of the first port of the refrigerant heat exchanger 10 and adjusts the opening degree of the second control valve 50 according to the refrigerant temperature T1 of the first port of the refrigerant heat exchanger 10 and the temperature T2 of the component to be cooled after the compressor 01 is started for 2min, so as to solve the problems of condensation and insufficient cooling capacity caused by cooling with a refrigerant in the related art.
In summary, according to the refrigerant heat dissipation device of the air conditioning system in the embodiment of the invention, the refrigerant heat exchanger is disposed opposite to the component to be dissipated of the air conditioning system to dissipate heat of the component to be dissipated, the first refrigerant pipeline is provided with the first control valve, and the second refrigerant pipeline is provided with the second control valve. The device detects the refrigerant temperature of the first port of the refrigerant heat exchanger in real time through the first temperature detection unit, and simultaneously detects the temperature of the heat dissipation part through the second temperature detection unit in real time, so that the control unit adjusts the opening degree of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger, adjusts the opening degree of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the heat dissipation part, and the problems of condensation and insufficient cooling capacity caused by refrigerant cooling in the related art can be solved.
In addition, the embodiment of the invention also provides an air conditioning system which comprises the refrigerant heat dissipation device of the air conditioning system.
According to the air conditioning system provided by the embodiment of the invention, through the refrigerant heat dissipation device of the air conditioning system, the problems of condensation and insufficient cooling capacity caused by cooling by adopting a refrigerant in the related art can be solved by adjusting the opening degrees of the first control valve and the second control valve.
Fig. 5 is a flowchart illustrating a refrigerant heat dissipation method of an air conditioning system according to an embodiment of the present invention.
In an embodiment of the present invention, as shown in fig. 1, the refrigerant heat dissipation device of the air conditioning system may include a refrigerant heat exchanger 10, a first refrigerant pipeline 20, a second refrigerant pipeline 30, a first control valve 40, and a second control valve 50, where the refrigerant heat exchanger 10 is disposed opposite to a component to be heat-dissipated of the air conditioning system, the refrigerant heat exchanger 10 is configured to dissipate heat of the component to be heat-dissipated, the first refrigerant pipeline 20 is connected to a first port of the refrigerant heat exchanger 10, the first refrigerant pipeline 20 is configured to convey a refrigerant flowing out of a refrigeration system of the air conditioning system to the refrigerant heat exchanger 10, the second refrigerant pipeline 30 is connected to a second port of the refrigerant heat exchanger 10, the second refrigerant pipeline 30 is configured to convey a refrigerant flowing out of the refrigerant heat exchanger 10 to the refrigeration system, the first control valve 40 is disposed on the first refrigerant pipeline 20, and the second control valve 50 is disposed on the second refrigerant pipeline 30.
As shown in fig. 5, the method for dissipating heat from refrigerant of the air conditioning system may include the following steps:
and S1, detecting the temperature of the refrigerant at the first port of the refrigerant heat exchanger.
And S2, detecting the temperature of the part to be cooled.
And S3, adjusting the opening degree of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger, and adjusting the opening degree of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the part to be cooled.
According to an embodiment of the present invention, adjusting the opening degree of the second control valve according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the component to be heat-dissipated includes: and when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is less than or equal to a first temperature threshold value and lasts for a preset time and the temperature of the part to be cooled is less than or equal to a preset lower limit temperature, controlling the opening of the second control valve to be reduced.
Further, adjusting the opening degree of the second control valve according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the component to be cooled further comprises: and when the temperature of the part to be cooled is greater than or equal to a preset upper limit temperature, controlling the opening of the second control valve to reach the maximum opening, wherein the preset upper limit temperature is greater than a preset lower limit temperature.
According to an embodiment of the present invention, the adjusting the opening degree of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger includes: when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is greater than a second temperature threshold value, controlling the opening degree of the first control valve to be reduced; when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is equal to a second temperature threshold value, controlling the opening degree of the first control valve to be kept unchanged; when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is smaller than a second temperature threshold value, controlling the opening degree of the first control valve to increase; wherein the second temperature threshold is greater than the first temperature threshold.
According to an embodiment of the present invention, before the adjusting the opening degrees of the first control valve and the second control valve, the method further includes: and after the air conditioning system is powered on, controlling the opening degrees of the first control valve and the second control valve to be in the maximum opening degree until a compressor of the air conditioning system is started for a second preset time.
It should be noted that, details not disclosed in the refrigerant heat dissipation method of the air conditioning system according to the embodiment of the present invention refer to details disclosed in the refrigerant heat dissipation device of the air conditioning system according to the embodiment of the present invention, and detailed descriptions thereof are omitted here.
According to the refrigerant heat dissipation method of the air conditioning system, the temperature of the refrigerant at the first port of the refrigerant heat exchanger is detected in real time, the temperature of the part to be dissipated is detected in real time, the opening degree of the first control valve is adjusted according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger, and the opening degree of the second control valve is adjusted according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the part to be dissipated. The method can solve the problems of condensation and insufficient cooling capacity caused by cooling by adopting a refrigerant in the related art by adjusting the opening degrees of the first control valve and the second control valve.
In addition, an embodiment of the present invention further provides a non-transitory computer readable storage medium, on which a refrigerant heat dissipation program of an air conditioning system is stored, and when the program is executed by a processor, the method for cooling the refrigerant of the air conditioning system is implemented.
According to the non-transitory computer readable storage medium of the embodiment of the invention, through the refrigerant heat dissipation method of the air conditioning system, the problems of condensation and insufficient cooling capacity caused by refrigerant cooling in the related art can be solved by adjusting the opening degrees of the first control valve and the second control valve.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In addition, in the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (8)

1. A refrigerant heat sink of an air conditioning system, comprising:
the refrigerant heat exchanger is arranged opposite to a part to be cooled of the air conditioning system and used for cooling the part to be cooled;
the first refrigerant pipeline is connected with a first port of the refrigerant heat exchanger and used for conveying refrigerant which flows out of a refrigerating system of the air conditioning system to the refrigerant heat exchanger;
the second refrigerant pipeline is connected with a second port of the refrigerant heat exchanger and is used for conveying the refrigerant flowing out of the refrigerant heat exchanger to the refrigerating system;
the first control valve is arranged on the first refrigerant pipeline;
the second control valve is arranged on the second refrigerant pipeline;
the first temperature detection unit is used for detecting the temperature of the refrigerant at the first port of the refrigerant heat exchanger;
the second temperature detection unit is used for detecting the temperature of the part to be cooled;
the control unit is connected with the first control valve, the second control valve, the first temperature detection unit and the second temperature detection unit respectively, and is used for adjusting the opening degree of the first control valve according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and adjusting the opening degree of the second control valve according to the temperature of the refrigerant at the first port of the refrigerant heat exchanger and the temperature of the part to be cooled;
wherein the control unit is specifically configured to,
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is less than or equal to a first temperature threshold value and lasts for a preset time, and the temperature of the part to be cooled is less than or equal to a preset lower limit temperature, controlling the opening of the second control valve to be reduced;
and when the temperature of the part to be cooled is greater than or equal to a preset upper limit temperature, controlling the opening of the second control valve to reach the maximum opening, wherein the preset upper limit temperature is greater than the preset lower limit temperature.
2. The refrigerant heat sink device of claim 1, wherein the control unit is configured to,
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is greater than a second temperature threshold value, controlling the opening degree of the first control valve to be reduced;
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is equal to the second temperature threshold value, controlling the opening degree of the first control valve to be kept unchanged;
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is smaller than the second temperature threshold value, controlling the opening degree of the first control valve to increase;
wherein the second temperature threshold is greater than the first temperature threshold.
3. The refrigerant heat sink according to claim 1, wherein before the opening degrees of the first control valve and the second control valve are adjusted, the control unit is further configured to control the opening degrees of the first control valve and the second control valve to be at a maximum opening degree after the air conditioning system is powered on until a compressor of the air conditioning system is started for a second preset time.
4. An air conditioning system comprising the refrigerant heat dissipating device of the air conditioning system according to any one of claims 1 to 3.
5. A refrigerant heat dissipation method of an air conditioning system is characterized in that a refrigerant heat dissipation device of the air conditioning system comprises a refrigerant heat exchanger, a first refrigerant pipeline, a second refrigerant pipeline, a first control valve and a second control valve, wherein the refrigerant heat exchanger is arranged opposite to a part to be dissipated of the air conditioning system, the refrigerant heat exchanger is used for dissipating heat of the part to be dissipated, the first refrigerant pipeline is connected with a first port of the refrigerant heat exchanger, the first refrigerant pipeline is used for conveying refrigerant flowing out of a refrigerating system of the air conditioning system to the refrigerant heat exchanger, the second refrigerant pipeline is connected with a second port of the refrigerant heat exchanger, the second refrigerant pipeline is used for conveying the refrigerant flowing out of the refrigerant heat exchanger to the refrigerating system, the first control valve is arranged on the first refrigerant pipeline, and the second control valve is arranged on the second pipeline, wherein the method comprises the steps of:
detecting the temperature of a refrigerant at a first port of the refrigerant heat exchanger;
detecting the temperature of the part to be radiated;
adjusting the opening degree of the first control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger, and adjusting the opening degree of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the part to be cooled;
wherein, the adjusting the opening degree of the second control valve according to the refrigerant temperature of the first port of the refrigerant heat exchanger and the temperature of the part to be cooled comprises:
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is less than or equal to a first temperature threshold value and lasts for a preset time, and the temperature of the part to be cooled is less than or equal to a preset lower limit temperature, controlling the opening of the second control valve to be reduced;
and when the temperature of the part to be cooled is greater than or equal to a preset upper limit temperature, controlling the opening of the second control valve to reach the maximum opening, wherein the preset upper limit temperature is greater than the preset lower limit temperature.
6. The refrigerant heat dissipation method of an air conditioning system according to claim 5, wherein the adjusting the opening degree of the first control valve according to the refrigerant temperature at the first port of the refrigerant heat exchanger comprises:
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is greater than a second temperature threshold value, controlling the opening degree of the first control valve to be reduced;
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is equal to the second temperature threshold value, controlling the opening degree of the first control valve to be kept unchanged;
when the temperature of the refrigerant at the first port of the refrigerant heat exchanger is smaller than the second temperature threshold value, controlling the opening degree of the first control valve to increase;
wherein the second temperature threshold is greater than the first temperature threshold.
7. The method of claim 5, further comprising, before adjusting the opening degrees of the first and second control valves:
and after the air conditioning system is powered on, controlling the opening degrees of the first control valve and the second control valve to be in the maximum opening degree until a compressor of the air conditioning system is started for a second preset time.
8. A non-transitory computer readable storage medium, having stored thereon a refrigerant heat dissipation program of an air conditioning system, the program, when executed by a processor, implementing the refrigerant heat dissipation method of the air conditioning system as recited in any one of claims 5 to 7.
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