CN112880123A - Compressor cooling device of air conditioner and control method thereof - Google Patents
Compressor cooling device of air conditioner and control method thereof Download PDFInfo
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- CN112880123A CN112880123A CN201911205276.2A CN201911205276A CN112880123A CN 112880123 A CN112880123 A CN 112880123A CN 201911205276 A CN201911205276 A CN 201911205276A CN 112880123 A CN112880123 A CN 112880123A
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/62—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
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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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- 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
- F25B49/00—Arrangement or mounting of control or safety devices
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- Combustion & Propulsion (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention belongs to the technical field of heat exchange equipment, and particularly relates to a compressor cooling device of an air conditioner and a control method thereof. The cooling device of the compressor comprises a liquid storage component and a heating component. When the liquid storage component is in a low-pressure state, the cooling device of the compressor can improve the pressure inside the liquid storage component in a mode of starting the heating component, so that obvious pressure difference is formed between the liquid storage component and the compressor, and further, a refrigerant in the liquid storage component flows into a cooling opening of the compressor. The normal conveying of low-temperature refrigerants can be realized without arranging a pump device, and the problems that the pump device is poor in working reliability, abrasion scrap iron blocks a cooling port of a compressor and the like are avoided. Meanwhile, the compressor cooling device can increase the pressure difference between the liquid storage component and the compressor through the heating component, is not limited by a low-temperature environment, and has good adaptability to the operating environment.
Description
Technical Field
The invention belongs to the technical field of heat exchange equipment, and particularly relates to a compressor cooling device of an air conditioner and a control method thereof.
Background
The compressor is the core of the refrigerant circulation system of the air conditioner. When the air conditioner runs, the temperature of the compressor can be continuously increased, and if the temperature of the compressor is not timely reduced, electronic elements such as a frequency converter and a motor of the compressor are extremely easy to burn out, so that the whole air conditioner cannot run normally. In view of this, the compressor must be operated to ensure that sufficient refrigerant enters the compressor cooling port to cool the compressor.
At present, the commonly used cooling scheme of the compressor is as follows: a liquid injection pipeline communicated to a cooling port of a compressor is added in a pipeline system of the air conditioner, and a refrigerant pump is arranged on the liquid injection pipeline, so that enough refrigerant enters the cooling port of the compressor. The disadvantages of the above embodiments are: the refrigerant pump is worn and produces iron chips which are carried along with the refrigerant to the refrigerant inlet of the compressor. After long-term operation, the refrigerant inlet of the compressor is blocked, and the normal circulation of the refrigerant is influenced.
Accordingly, there is a need in the art for a new compressor cooling device of an air conditioner and a method for controlling the same to solve the above-mentioned problems.
Disclosure of Invention
In order to solve the problems in the prior art, namely to solve the problems that the power pump in the prior compressor cooling system generates scrap iron and blocks the cooling port of the compressor when in operation, the invention provides a compressor cooling device of an air conditioner, the air conditioner comprises a compressor, a cooling device of the compressor comprises a liquid storage component capable of storing a refrigerant, a heating component, a control module and a first pressure detection component, the heating member and the first pressure detecting member are respectively in communication with the control module, the interior of the liquid storage component is communicated to a cooling port of the compressor through a cooling pipeline, the first pressure detection component can detect the pressure in the liquid storage component, the heating component can heat the refrigerant in the liquid storage component, and the control module is arranged to control the heating component to be started when the pressure in the liquid storage component is lower than a set pressure.
In a preferred technical solution of the above compressor cooling device, the air conditioner further includes an evaporator communicated with the compressor, the compressor cooling device further includes a second pressure detecting member disposed on the evaporator, the second pressure detecting member is configured to detect a suction pressure of the evaporator, the control module is further in communication connection with the second pressure detecting member, and the control module is capable of controlling the heating member to start when a pressure in the liquid storage member is lower than a product of the suction pressure and a preset value, where the preset value is greater than 1.
In a preferred technical solution of the above compressor cooling device, the air conditioner further includes a condenser, the compressor cooling device further includes a switch valve, the liquid storage member is communicated to the condenser through a liquid inlet pipeline, and the switch valve is disposed on the liquid inlet pipeline.
In the preferable technical scheme of the above compressor cooling device, the switch valve is a flow regulating valve, the compressor cooling device further comprises a liquid level meter arranged on the liquid storage component, the liquid level meter and the flow regulating valve are respectively in communication connection with the control module, and the control module can also regulate the opening degree of the flow regulating valve according to the liquid level height in the liquid storage component so as to maintain the liquid level in the liquid storage component at a set height.
In a preferred technical solution of the above compressor cooling device, the flow regulating valve is an electronic ball valve.
In a preferred embodiment of the above compressor cooling device, the compressor cooling device further includes a filter disposed on the cooling line.
In a preferred embodiment of the above compressor cooling device, the compressor cooling device further includes a safety valve disposed on the liquid storage member.
In addition, the present invention provides a method for controlling a compressor cooling device of an air conditioner, the compressor cooling device being any one of the above compressor cooling devices, the method comprising: acquiring the temperature of the compressor under the condition that the compressor is operated; acquiring the pressure of the liquid storage component through the first pressure detection component; and if the temperature of the compressor is always higher than the set temperature within the preset time and the pressure of the liquid storage component is lower than the set pressure, starting the heating component.
In a preferred technical solution of the above control method, the set pressure is a product of a preset value and a suction pressure of an evaporator of the air conditioner, wherein the preset value is greater than 1.
In a preferred embodiment of the above control method, the compressor cooling device includes a flow rate adjustment valve, and the control method further includes: acquiring the liquid level height in the liquid storage component under the condition that the cooling pipeline circulates; and if the liquid level height is lower than a set height, increasing the opening degree of the switch valve.
As will be appreciated by those skilled in the art, the liquid storage member of the compressor cooling apparatus of the present invention is capable of storing a refrigerant for cooling the compressor so as to supply a low temperature refrigerant to the compressor for cooling the compressor. The compressor cooling device further includes a heating member. When the liquid storage component is in a low-pressure state, the pressure in the liquid storage component can be increased by starting the heating component, so that obvious pressure difference is formed between the liquid storage component and the compressor, and a refrigerant in the liquid storage component is enabled to flow into a cooling opening of the compressor. Through the arrangement, normal conveying of low-temperature refrigerants can be achieved without arranging a pump device, and the problems that the pump device is poor in working reliability and generates abrasion scrap iron to block a cooling port of a compressor and the like are avoided. Meanwhile, the compressor cooling device of the invention is not limited by environment, and can increase the pressure difference through the heating component even if the pressure difference between the liquid storage component and the compressor position is insufficient under the low-temperature environment. Compared with the existing compressor cooling device, the compressor cooling device provided by the invention has the advantage that the adaptability to the operation environment is greatly improved.
Preferably, the compressor cooling device of the present invention further includes a second pressure detecting means provided on the evaporator of the air conditioner for detecting a suction pressure value of the evaporator. The compressor cooling device is capable of activating the heating means when the pressure value inside the liquid storage means is lower than the product of the suction pressure value of the evaporator and a preset value. The pressure standard is set based on the suction pressure of the evaporator so as to set the lowest refrigerant conveying condition met by the pressure value of the liquid storage component, and the refrigerant conveying time is controlled more accurately.
Preferably, the liquid storage component is communicated to a condenser of the air conditioner through a liquid inlet pipeline, and the compressor cooling device further comprises a switch valve arranged on the liquid inlet pipeline. The liquid storage component can be used for supplementing liquid through the condenser, a refrigerant liquid supplementing pipeline is not required to be arranged for the liquid storage component independently, and the pipeline structure of the compressor cooling device is reasonably combined with the refrigerant circulating pipeline of the air conditioner, so that the optimization of the pipeline structure of the compressor cooling device is realized.
Further, the switch valve is a flow regulating valve. The compressor cooling device further comprises a liquid level meter arranged on the liquid storage component, so that the compressor cooling device can control the opening degree of the flow regulating valve to supplement liquid according to the liquid level height in the liquid storage component, and the liquid level in the liquid storage component is maintained at the set height. The liquid supply requirement of the compressor cooling device is met, the whole volume of the compressor cooling device is optimized, the arrangement space of the compressor cooling device is reduced, and the adaptability of the compressor cooling device to the installation environment is improved. In addition, the liquid supplementing and discharging processes can increase the circulation efficiency of the refrigerant in the liquid storage component, so that the liquid storage component can avoid overlong heated time and overlarge heating amplitude of the refrigerant of the same part while increasing the pressure difference through the heating component, and the cooling capacity of the low-temperature refrigerant is ensured.
Preferably, the cooling device of the compressor of the present invention further includes a filter disposed on the cooling pipeline, so as to filter impurities in the refrigerant through the filter, and prevent the impurities in the refrigerant from depositing and accumulating at the cooling port of the compressor and affecting the fluency of the refrigerant.
Preferably, be provided with the relief valve on the liquid storage component to avoid the liquid storage component internal pressure too high, make the liquid storage component also can not appear dangerously because of continuously increasing pressure when heating member trouble, promoted compressor cooling device's security.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a system configuration diagram of a cooling apparatus of a compressor according to the present invention.
In the drawings: 1. a compressor; 2. a condenser; 3. an evaporator; 4. an electronic expansion valve; 5. a compressor cooling device; 51. a liquid storage member; 52. a heating member; 53. a first pressure detecting member; 54. a second pressure detecting member; 55. a flow regulating valve; 56. a liquid level meter; 57. a filter; 58. a safety valve.
Detailed Description
It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example,
it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are for convenience of description only, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring first to fig. 1, fig. 1 is a system configuration diagram of a cooling apparatus of a compressor according to the present invention. As shown in fig. 1, the air conditioner includes a compressor 1, a condenser 2, an evaporator 3, and an electronic expansion valve 4. The compressor 1, the condenser 2, the evaporator 3 and the electronic expansion valve 4 are communicated into a closed loop pipeline structure through a refrigerant conveying pipeline, so that refrigerant can circularly flow in the closed loop structure, and the heat exchange requirement of the air conditioner is met. The air conditioner further comprises a compressor cooling device 5 for cooling down the compressor 1. When the temperature of the motor or the frequency converter of the compressor 1 is too high, the compressor cooling device 5 is started to deliver low-temperature refrigerant to the compressor 1 so as to cool the compressor 1. Specifically, the compressor cooling device 5 includes a control module, a liquid storage member 51, a heating member 52, and a first pressure detecting member 53. The liquid storage member 51 stores therein a low-temperature refrigerant. The liquid storage member 51 is provided with a refrigerant outlet communicated with the inside, the compressor 1 is provided with a cooling port allowing the refrigerant to flow in, and the cooling pipeline is communicated between the refrigerant outlet and the cooling port, so that the low-temperature refrigerant in the liquid storage member 51 can flow into the compressor 1 along the cooling pipeline, and the temperature of a frequency converter or a motor of the compressor 1 is reduced. The heating member 52 can heat the refrigerant in the liquid storage member 51. The first pressure detecting member 53 is capable of detecting the pressure within the reservoir member 51. The control module is configured to control the heating member 52 to activate when the pressure within the reservoir member 51 is below a set pressure.
In the above embodiment, the set pressure is a pressure value set as a reference standard. The set criteria for the set pressure are: in the case that the pressure in the liquid storage member 51 is greater than or equal to the set pressure, the pressure in the liquid storage member 51 is higher than the pressure at the position of the compressor 1, and the pressure difference between the liquid storage member 51 and the compressor 1 can promote the refrigerant in the liquid storage member 51 to flow into the compressor 1. The first pressure detecting member 53 is any member capable of directly or indirectly detecting the pressure inside the liquid storage member 51, such as a pressure sensor.
As can be understood by those skilled in the art, the compressor cooling device 5 of the invention conveys the refrigerant by pressure intensity without arranging a power device such as a liquid pump, and the like, thereby avoiding the problem that the power device generates redundant abrasion impurities in a cooling pipeline when running so as to block a cooling port of the compressor 1. Meanwhile, the compressor cooling device 5 of the present invention is not necessarily limited by the external temperature environment. Under the real-time monitoring of the first pressure detection component 53, if the external environment temperature is appropriate and the obvious pressure difference exists between the liquid storage component 51 and the compressor 1, the low-temperature refrigerant can flow from the liquid storage component 51 to the compressor 1 without starting a heating device; if the external environment temperature is low and the pressure difference between the liquid storage component 51 and the position of the compressor 1 is difficult to meet the refrigerant output requirement of the liquid storage component 51, the heating component 52 can be controlled by the control module to start, so that the pressure inside the liquid storage component 51 is increased in a heating mode until the refrigerant output requirement of the liquid storage component 51 is met.
Through the aforesaid setting, the restriction of traditional compressor cooling device 5 to power device or ambient temperature environment has been broken for compressor cooling device 5 possesses extremely strong operational environment adaptability, the equal supply that can realize the low temperature refrigerant smoothly under different temperature environment is carried, can not make in addition thoughtlessly have wearing and tearing impurity in the refrigerant in the cooling line, the low temperature refrigerant flow in having guaranteed to get into compressor 1, prevented that compressor 1 is slow because of the refrigerant flow is not enough, the emergence of the circumstances such as cooling degree is not enough.
In a possible case, the compressor cooling device 5 also comprises a timer associated with the heating member 52. When the control module controls the heating component 52 to be started, the heating component 52 is automatically turned off after being heated for a set time under the control of the timer. The set time can be set according to an actual heating requirement (such as a difference between the pressure of the liquid storage member 51 and the set pressure), a limit pressure that can be borne by the interior of the liquid storage member 51 in a normal state, and the like.
In a preferred embodiment, when the control module receives the pressure value in the liquid storage member 51 after the heating member 52 is activated, which is transmitted by the first pressure detection member 53, the control module can also control the heating member 52 to be turned off according to the change of the pressure value in the liquid storage member 51. For example, the control module may also be configured to control the heating member 52 to turn off when the pressure in the reservoir member 51 is not below the set pressure for a set time.
Further, the compressor cooling device 5 of the present invention further includes a second pressure detecting member 54 provided on the evaporator 3. The second pressure detecting member 54 is for detecting the suction pressure of the evaporator 3. The control module is also communicatively connected to a second pressure sensing means 54. The set pressure is a product of a suction pressure of the evaporator 3 and a preset value, and the control module can control the heating member 52 to start when the pressure in the liquid storage member 51 is lower than the product of the suction pressure and the preset value, wherein the preset value is greater than 1.
In the above embodiment, in view of the communication relationship between the evaporator 3 and the compressor 1, the suction pressure of the evaporator 3 may represent the pressure at the position of the compressor 1. Setting a dynamic set pressure based on the suction pressure of the evaporator 3 enables the variation of the suction pressure of the evaporator 3 to be taken as a key factor into the operation scheme of the compressor cooling device 5, as compared with setting a fixed value suitable for all cooling environments as the set pressure, so that the pressure requirement of the liquid storage member 51 can be changed based on the actual pressure at the position of the compressor 1, and the timing of starting the heating member 52 can be grasped more accurately. The close linkage between the compressor cooling device 5 and the operation environment is increased, so that the operation reliability of the compressor cooling device 5 is improved. In addition, the preset value can be set according to the actual operating environment of the compressor cooling device 5, the heating time requirement, the cooling requirement and other factors, and the preset value which is mainly set can meet the refrigerant output requirement of the compressor cooling device 5. As an example, the second pressure detecting member 54 is a pressure sensor.
In one possible embodiment, the liquid storage member 51 is provided with a separate liquid inlet pipe, which is connected between the refrigerant supply source and the liquid storage member 51, so as to supplement the refrigerant in the liquid storage member 51 through the liquid inlet pipe.
Preferably, the liquid inlet pipeline is communicated with the condenser 2 of the air conditioner, so that the refrigerant in the condenser 2 can flow into the liquid storage component 51 through the liquid inlet pipeline to replenish the liquid to the liquid storage component 51. The compressor cooling device 5 further comprises a switch valve which is arranged on the liquid inlet pipeline so as to control the on-off of the liquid inlet pipeline. Through the arrangement, the liquid inlet pipeline can be merged into a pipeline system of the air conditioner, an independent refrigerant supply source is not required to be arranged for the liquid storage component 51, the occupied space of the compressor cooling device 5 is reduced, and the adaptability of the compressor cooling device 5 to the installation environment is ensured.
Further, the on-off valve is a flow rate control valve 55. The compressor cooling device 5 further includes a liquid level gauge 56 disposed on the liquid storage member 51. The liquid level gauge 56 is capable of measuring a liquid level of the refrigerant stored in the liquid storage member 51. The liquid level meter 56 and the flow regulating valve 55 are respectively in communication connection with the control module, the control module can also adjust the opening degree of the flow regulating valve 55 according to the liquid level height in the liquid storage member 51, for example, when the liquid level height in the liquid storage member 51 is far lower than the set height, the opening degree of the flow regulating valve 55 is increased so as to rapidly replenish liquid for the liquid storage member 51, and when the liquid level height in the liquid storage member 51 is close to the set height, the opening degree of the flow regulating valve 55 is reduced so as to avoid the excessive refrigerant replenishing amount in the liquid storage member 51, so that the liquid level in the liquid storage member 51 is maintained at the set height. When the liquid storage member 51 supplies the low-temperature refrigerant, the refrigerant in the liquid storage member 51 is continuously output outwards, the control module adjusts the flow regulating valve 55 based on the control logic of the flow regulating valve 55, and the liquid storage member 51 outputs the refrigerant while supplementing liquid, so that the liquid level of the refrigerant in the liquid storage member 51 is maintained at a set height. When the liquid storage component 51 stops outputting the refrigerant, the liquid level of the refrigerant gradually reaches the set height, and the control module controls the flow regulating valve 55 to regulate the opening degree to be closed. The flow rate adjustment valve 55 is, for example, an electronic ball valve.
Preferably, the compressor cooling device 5 further includes a filter 57 disposed on the cooling line to filter impurities in the refrigerant flowing through the cooling line. Through setting up filter 57 for even get into the refrigerant with impurity in the liquid storage component 51 at the fluid infusion in-process, this impurity also can not flow to the cooling opening of compressor 1 along with the refrigerant, makes the cooling opening of compressor 1 also can not blockked up by impurity after compressor cooling device 5 long-term operation.
Preferably, the compressor cooling device 5 further includes a relief valve 58 disposed on the reservoir member 51. When the pressure within the reservoir member 51 is too high, above a safe level, the relief valve 58 opens to depressurize the reservoir member 51 to avoid the risk of bursting if the pressure within the reservoir member 51 is too high. The safety valve 58 can be manually started by detecting and giving out alarm information based on the first pressure detection component 53, and can also be in communication connection with the control module, and when the first pressure detection component 53 detects that the pressure in the liquid storage component 51 is too high, the safety valve 58 is automatically opened by the control module to release the pressure of the liquid storage component 51.
Based on the compressor cooling device 5, the invention also provides a control method, which comprises the following steps:
acquiring the temperature of the compressor 1 under the condition that the compressor 1 is operated;
acquiring the pressure of the reservoir member 51 by the first pressure detecting member 53;
the heating means 52 is activated if the temperature of the compressor 1 is always higher than the set temperature for a preset time and the pressure of the liquid storage means 51 is lower than the set pressure.
Further, the set pressure is the product of a preset value and the suction pressure of the evaporator 3, wherein the preset value is larger than 1.
As an example, the preset time is 20 seconds, and the preset value is 1.5. When the compressor 1 is operated, the heating means 52 is controlled to be activated if the pressure of the liquid storage means 51 is detected to be less than 1.5 times the suction pressure and the temperature of the compressor 1 is always not less than 50 ℃ within 20 seconds. In order to avoid detection error of the pressure detection means, the suction pressure at which the pressure of the liquid storage means 51 is always less than 1.5 times during at least 5 consecutive seconds is defaulted to the condition that the pressure of the liquid storage means 51 is lower than the set pressure, that is, the interior of the liquid storage means 51 is in a low pressure state. After the temperature of the compressor 1 is cooled, if it is detected that the pressure of the liquid storage member 51 is always greater than 1.5 times the suction pressure for at least 5 seconds and the temperature of the compressor 1 is always not greater than 44 ℃ for 20 seconds, the heating member 52 is turned off, and the residual heat generated by the heating member 52 is enough to support the residual required amount of low-temperature refrigerant flow. When the temperature of the compressor 1 reaches the safe temperature, the electromagnetic valve at the cooling port of the compressor 1 is closed, and the cooling pipeline is in a cut-off state.
Further, in the case that the compressor 1 is cooled while the cooling line is in a circulating state, the liquid level height in the liquid storage member 51 is obtained;
if the liquid level of the refrigerant in the liquid storage member 51 is lower than the set level, the opening degree of the on-off valve (i.e., the flow rate adjustment valve 55) is increased.
More specifically, when the liquid level height of the refrigerant in the liquid storage member 51 is lower than the set height, "increasing the opening degree of the flow rate adjustment valve 55" specifically includes:
acquiring the height difference between the liquid level height and the set height of the refrigerant in the liquid storage component 51;
if the height difference is equal to or greater than the set height difference, the opening degree of the flow rate adjustment valve 55 is increased from zero to the first opening degree;
if the height difference is smaller than the set height difference, the opening degree of the flow rate adjustment valve 55 is increased from zero to a second opening degree, wherein,
the first opening degree is greater than the second opening degree.
As described above, the compressor cooling device 5 of the present invention can use the differential pressure as power for transporting the low-temperature refrigerant, and can increase the differential pressure by the heating method when the differential pressure is insufficient. On the one hand, the compressor cooling device 5 can realize normal conveying of low-temperature refrigerants without arranging a pump device, and avoids the problems that the pump device is poor in working reliability, abrasion scrap iron blocks a cooling hole of the compressor 1 and the like. On the other hand, the compressor cooling device 5 of the present invention is not limited by a low temperature environment, and has good adaptability to an operating environment.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A cooling device of a compressor of an air conditioner is characterized in that the air conditioner comprises the compressor, the cooling device of the compressor comprises a liquid storage component capable of storing a refrigerant, a heating component, a control module and a first pressure detection component,
the heating component and the first pressure detection component are respectively in communication connection with the control module, the interior of the liquid storage component is communicated to a cooling port of the compressor through a cooling pipeline, the first pressure detection component can detect the pressure in the liquid storage component, the heating component can heat a refrigerant in the liquid storage component, and the control module is set to control the heating component to be started when the pressure in the liquid storage component is lower than a set pressure.
2. The compressor cooling arrangement of claim 1, wherein the air conditioner further includes an evaporator in communication with the compressor, the compressor cooling arrangement further including a second pressure sensing device disposed on the evaporator, the second pressure sensing device being configured to sense a suction pressure of the evaporator, the control module being further in communication with the second pressure sensing device, the control module being configured to control the heating device to activate when a pressure within the reservoir is less than a product of the suction pressure and a predetermined value,
wherein the preset value is greater than 1.
3. The compressor cooling arrangement of claim 1, wherein the air conditioner further includes a condenser, the compressor cooling arrangement further including a switch valve, the liquid storage member being communicated to the condenser by a liquid inlet line, the switch valve being disposed on the liquid inlet line.
4. The compressor cooling arrangement of claim 3, wherein the on-off valve is a flow regulating valve, the compressor cooling arrangement further comprising a liquid level gauge disposed on the liquid storage member, the liquid level gauge and the flow regulating valve each being in communication with the control module,
the control module is also capable of adjusting the opening of the flow regulating valve according to the liquid level height in the liquid storage component so as to maintain the liquid level in the liquid storage component at a set height.
5. The compressor cooling arrangement of claim 4, wherein the flow regulating valve is an electronic ball valve.
6. The compressor cooling arrangement of claim 1, further comprising a filter disposed on the cooling line.
7. The compressor cooling arrangement of claim 1, further comprising a relief valve disposed on the reservoir member.
8. A control method of a compressor cooling apparatus of an air conditioner, characterized in that the compressor cooling apparatus is the compressor cooling apparatus of any one of claims 3 to 7, the control method comprising:
acquiring the temperature of the compressor under the condition that the compressor is operated;
acquiring the pressure of the liquid storage component through the first pressure detection component;
and if the temperature of the compressor is always higher than the set temperature within the preset time and the pressure of the liquid storage component is lower than the set pressure, starting the heating component.
9. The control method according to claim 8, wherein the set pressure is a product of a preset value and a suction pressure of an evaporator of the air conditioner, wherein the preset value is greater than 1.
10. The control method of claim 9, wherein the compressor cooling device includes a flow regulating valve, the control method further comprising:
acquiring the liquid level height in the liquid storage component under the condition that the cooling pipeline circulates;
and if the liquid level height is lower than a set height, increasing the opening degree of the switch valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205276.2A CN112880123B (en) | 2019-11-29 | 2019-11-29 | Compressor cooling device of air conditioner and control method thereof |
| PCT/CN2020/094895 WO2021103476A1 (en) | 2019-11-29 | 2020-06-08 | Compressor cooling device of air conditioner and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911205276.2A CN112880123B (en) | 2019-11-29 | 2019-11-29 | Compressor cooling device of air conditioner and control method thereof |
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| CN112880123A true CN112880123A (en) | 2021-06-01 |
| CN112880123B CN112880123B (en) | 2021-12-28 |
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| CN201911205276.2A Active CN112880123B (en) | 2019-11-29 | 2019-11-29 | Compressor cooling device of air conditioner and control method thereof |
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| CN (1) | CN112880123B (en) |
| WO (1) | WO2021103476A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198922A (en) * | 2021-11-22 | 2022-03-18 | 青岛海尔空调电子有限公司 | Liquid supply system of compressor |
| CN114353394A (en) * | 2022-01-04 | 2022-04-15 | 烽火通信科技股份有限公司 | Low-temperature starting control method, device and equipment for machine room air conditioner and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198950B (en) * | 2021-11-22 | 2023-12-26 | 青岛海尔空调电子有限公司 | Liquid supply system of compressor |
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| CN205561324U (en) * | 2016-01-28 | 2016-09-07 | 苏州必信空调有限公司 | Refrigerating system |
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| AU2010225956A1 (en) * | 2009-03-19 | 2011-11-03 | Daikin Industries, Ltd. | Air conditioning apparatus |
| CN203454502U (en) * | 2013-07-30 | 2014-02-26 | 广东美的暖通设备有限公司 | Intelligent defrosting air-conditioning system |
| CN104964343A (en) * | 2015-06-12 | 2015-10-07 | 广东美的暖通设备有限公司 | Device and method for improving running reliability of compressor |
| CN107014096A (en) * | 2017-05-25 | 2017-08-04 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of technical cooling under pole low temperature environment is with air-cooled single cooler group |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114198922A (en) * | 2021-11-22 | 2022-03-18 | 青岛海尔空调电子有限公司 | Liquid supply system of compressor |
| CN114198922B (en) * | 2021-11-22 | 2023-08-15 | 青岛海尔空调电子有限公司 | Liquid supply system of compressor |
| CN114353394A (en) * | 2022-01-04 | 2022-04-15 | 烽火通信科技股份有限公司 | Low-temperature starting control method, device and equipment for machine room air conditioner and storage medium |
| CN114353394B (en) * | 2022-01-04 | 2023-12-22 | 烽火通信科技股份有限公司 | Low-temperature starting control method, device and equipment for machine room air conditioner and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112880123B (en) | 2021-12-28 |
| WO2021103476A1 (en) | 2021-06-03 |
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