CN110145804B - Control method and device for frequency converter heat dissipation device - Google Patents

Control method and device for frequency converter heat dissipation device Download PDF

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Publication number
CN110145804B
CN110145804B CN201910385390.1A CN201910385390A CN110145804B CN 110145804 B CN110145804 B CN 110145804B CN 201910385390 A CN201910385390 A CN 201910385390A CN 110145804 B CN110145804 B CN 110145804B
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Prior art keywords
temperature
expansion valve
electronic expansion
tube
preset
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CN201910385390.1A
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CN110145804A (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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Priority to CN201910385390.1A priority Critical patent/CN110145804B/en
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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • 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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Rectifiers (AREA)

Abstract

The invention provides a control method and a device of a frequency converter heat dissipation device, wherein the frequency converter heat dissipation device comprises the following components: the method comprises the steps of: the method comprises the steps of obtaining the temperature of the cooling dehumidifying evaporator and the temperature of an environmental wet bulb, obtaining the tube temperatures of a first switch tube, a second switch tube and a third switch tube, adjusting the working state of the cooling dehumidifying evaporator according to the temperature of the cooling dehumidifying evaporator and the temperature of the environmental wet bulb, controlling a first electronic expansion valve, a second electronic expansion valve and a third electronic expansion valve according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and the first preset temperature, so that the condensation risk of the heat dissipation device of the frequency converter is avoided while the heat dissipation performance of the heat dissipation device of the frequency converter is ensured, and the reliability is improved.

Description

Control method and device for frequency converter heat dissipation device
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of a frequency converter heat dissipation device and a control device of the frequency converter heat dissipation device.
Background
In the related art, when only the power module is generally cooled, the heat radiator is used for concentrated cooling.
However, the related art has problems that when the heat dissipation of the heat sink is uneven, that is, when the temperature of the heat sink is low, dew is easily generated if the temperature of the heat sink is lower than the dew point temperature of the environment, the reliability of the power module is lowered, short circuits occur, and the like, and the problem of dew is also caused in addition to the power module.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, a first object of the present invention is to provide a control method for a radiator of a frequency converter, which can avoid the risk of condensation of the radiator of the frequency converter while ensuring the heat dissipation performance of the radiator of the frequency converter, and improve the reliability.
A second object of the present invention is to provide a control device for a heat dissipating device of a frequency converter.
To achieve the above object, a first aspect of the present invention provides a control method of a heat dissipation device of a frequency converter, wherein the heat dissipation device of the frequency converter includes: a first radiator for radiating heat from a first switching tube, a second radiator for radiating heat from a second switching tube, a third radiator for radiating heat from a third switching tube, a first electronic expansion valve connected to the first radiator, a second electronic expansion valve connected to the second radiator, a third electronic expansion valve connected to the third radiator, and a cooling and dehumidifying evaporator, the method comprising: acquiring the temperature of the cooling dehumidifying evaporator and the temperature of an ambient wet bulb; acquiring tube temperatures of the first switching tube, the second switching tube and the third switching tube; according to the temperature of the cooling dehumidifying evaporator and the temperature of the environment wet bulb, the working state of the cooling dehumidifying evaporator is adjusted; and controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and a first preset temperature.
According to the control method of the frequency converter heat dissipation device, the temperature of the cooling dehumidifying evaporator and the temperature of the environment wet bulb are obtained, the tube temperatures of the first switch tube, the second switch tube and the third switch tube are obtained, the working state of the cooling dehumidifying evaporator is adjusted according to the temperature of the cooling dehumidifying evaporator and the temperature of the environment wet bulb, the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve are controlled according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and the first preset temperature, so that the heat dissipation performance of the frequency converter heat dissipation device is ensured, the condensation risk of the frequency converter heat dissipation device is avoided, and the reliability is improved.
In addition, the control method of the frequency converter heat dissipation device according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the present invention, the adjusting the working state of the cooling and dehumidifying evaporator according to the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature includes: if the temperature of the cooling and dehumidifying evaporator is higher than the ambient wet bulb temperature, the working state of the cooling and dehumidifying evaporator is adjusted to be a closed state; and if the temperature of the cooling and dehumidifying evaporator is less than or equal to the ambient wet bulb temperature, adjusting the working state of the cooling and dehumidifying evaporator to be an opening state.
According to one embodiment of the present invention, the controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switching tube, the second switching tube and the third switching tube and the first preset temperature includes: if the first preset temperature is the first preset temperature of the tube Wen Dayu of the first switching tube, controlling the first electronic expansion valve to increase a first preset opening; if the first preset temperature is the pipe Wen Dayu of the second switching tube, controlling the second electronic expansion valve to increase the first preset opening; and if the pipe Wen Dayu of the third switching tube has the first preset temperature, controlling the third electronic expansion valve to increase the first preset opening.
According to one embodiment of the present invention, the controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switching tube, the second switching tube and the third switching tube and the first preset temperature further includes: if the tube temperature of the first switch tube is smaller than or equal to the first preset temperature, controlling the first electronic expansion valve to reduce the first preset opening; if the tube temperature of the second switching tube is smaller than or equal to the first preset temperature, controlling the second electronic expansion valve to reduce the first preset opening; and if the pipe temperature of the third switching pipe is smaller than or equal to the first preset temperature, controlling the third electronic expansion valve to reduce the first preset opening.
According to an embodiment of the present invention, the inverter heat dissipation device further includes: a fourth heat sink for dissipating heat from the first diode and a fourth electronic expansion valve coupled to the fourth heat sink, the method further comprising: acquiring the tube temperature of the first diode; and controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature.
According to one embodiment of the present invention, the controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature includes: if the second preset temperature of the tube Wen Dayu of the first diode is higher than the first preset opening, controlling the fourth electronic expansion valve to increase the first preset opening; and if the tube temperature of the first diode is smaller than or equal to the second preset temperature, controlling the fourth electronic expansion valve to reduce the first preset opening.
To achieve the above object, an embodiment of a second aspect of the present invention provides a control device for a heat dissipating device of a frequency converter, where the heat dissipating device of the frequency converter includes: a first radiator for radiating heat to a first switching tube, a second radiator for radiating heat to a second switching tube, a third radiator for radiating heat to a third switching tube, a first electronic expansion valve connected with the first radiator, a second electronic expansion valve connected with the second radiator, a third electronic expansion valve connected with the third radiator, and a cooling and dehumidifying evaporator, the control device comprising: the first acquisition module is used for acquiring the temperature of the cooling dehumidifying evaporator and the ambient wet bulb temperature; the second acquisition module is used for acquiring the tube temperatures of the first switching tube, the second switching tube and the third switching tube; the adjusting module is used for adjusting the working state of the cooling and dehumidifying evaporator according to the temperature of the cooling and dehumidifying evaporator and the temperature of the environment wet bulb; and the control module is used for controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and a first preset temperature.
According to the control device of the frequency converter heat dissipation device, the temperature of the cooling dehumidification evaporator and the temperature of the environmental wet bulb are obtained through the first obtaining module, the tube temperatures of the first switch tube, the second switch tube and the third switch tube are obtained through the second obtaining module, furthermore, the working state of the cooling dehumidification evaporator is adjusted through the adjusting module according to the temperature of the cooling dehumidification evaporator and the temperature of the environmental wet bulb, and the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve are controlled through the control module according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and the first preset temperature, so that the heat dissipation performance of the frequency converter heat dissipation device is ensured, the condensation risk of the frequency converter heat dissipation device is avoided, and the reliability is improved.
In addition, the control device of the frequency converter heat dissipation device 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 module is further configured to adjust the working state of the cooling and dehumidifying evaporator to a closed state if the temperature of the cooling and dehumidifying evaporator is greater than the ambient wet bulb temperature; and if the temperature of the cooling and dehumidifying evaporator is less than or equal to the ambient wet bulb temperature, adjusting the working state of the cooling and dehumidifying evaporator to be an opening state.
According to one embodiment of the invention, the control module is further configured to: if the first preset temperature is the first preset temperature of the tube Wen Dayu of the first switching tube, controlling the first electronic expansion valve to increase a first preset opening; if the first preset temperature is the pipe Wen Dayu of the second switching tube, controlling the second electronic expansion valve to increase the first preset opening; and if the pipe Wen Dayu of the third switching tube has the first preset temperature, controlling the third electronic expansion valve to increase the first preset opening.
According to an embodiment of the present invention, the control module is further configured to control the first electronic expansion valve to reduce the first preset opening degree if the tube temperature of the first switching tube is less than or equal to the first preset temperature; if the tube temperature of the second switching tube is smaller than or equal to the first preset temperature, controlling the second electronic expansion valve to reduce the first preset opening; and if the pipe temperature of the third switching pipe is smaller than or equal to the first preset temperature, controlling the third electronic expansion valve to reduce the first preset opening.
According to an embodiment of the present invention, the inverter heat dissipation device further includes: a fourth radiator for radiating heat of the first diode and a fourth electronic expansion valve connected with the fourth radiator, wherein the control device further comprises: the third acquisition module is used for acquiring the tube temperature of the first diode; the control module is further used for controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature.
According to one embodiment of the present invention, the control module is further configured to control the fourth electronic expansion valve to increase a first preset opening degree if the second preset temperature is the second preset temperature of the tube Wen Dayu of the first diode; and if the tube temperature of the first diode is smaller than or equal to the second preset temperature, controlling the fourth electronic expansion valve to reduce the first preset opening.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural diagram of a radiator of a frequency converter according to an embodiment of the invention;
FIG. 2 is a schematic diagram illustrating a connection mode of a heat dissipating device of a frequency converter according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of a heat dissipating device of a frequency converter according to an embodiment of the invention;
FIG. 4 is a flow chart of a control method of a heat sink of a frequency converter according to an embodiment of the invention;
fig. 5 is a flowchart illustrating a control method of a heat dissipating device of a frequency converter according to another embodiment of the present invention;
FIG. 6 is a flow chart of a control method of a heat sink of a frequency converter according to still another embodiment of the present invention;
Fig. 7 is a flowchart of a control method of a heat dissipating device of a frequency converter according to still another embodiment of the present invention;
fig. 8 is a block schematic diagram of a control device of a radiator of a frequency converter according to an embodiment of the invention;
fig. 9 is a block diagram of a control device of a heat sink of a frequency converter according to an embodiment of the invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The control method and apparatus of the inverter heat sink of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a heat dissipating device of a frequency converter according to an embodiment of the present invention.
As shown in fig. 1, in some embodiments of the present invention, a frequency converter heat sink 100 includes: a first radiator 10 for radiating heat from a first switching tube, a second radiator 20 for radiating heat from a second switching tube, a third radiator 30 for radiating heat from a third switching tube, a first electronic expansion valve 101 connected to the first radiator 10, a second electronic expansion valve 201 connected to the second radiator 20, a third electronic expansion valve 301 connected to the third radiator 30, and a cooling and dehumidifying evaporator 40.
Alternatively, in the embodiment of the present invention, the first radiator 10, the second radiator 20, and the third radiator 30 may be refrigerant radiators.
Specifically, as shown in fig. 2, one end of the inverter heat sink 100 is connected to one end of the refrigerant throttle valve c and to the inlet of the evaporator d, and the other end of the inverter heat sink 100 is connected to the other end of the refrigerant throttle valve c and to the outlet of the condenser e.
Further, the refrigerant of the air conditioner enters the compressor INC to be compressed into a high-temperature high-pressure gaseous refrigerant, then enters the condenser e to be condensed into a high-pressure liquid refrigerant, and then passes through the refrigerant throttle valve c to be converted into a low-pressure two-phase state, namely a gas-liquid mixed state, and enters the evaporator d to be evaporated into a gaseous refrigerant and then enters the compressor INC again, so that one cycle of the refrigerant is realized.
It will be appreciated that in the inverter heat dissipation device 100 of an air conditioner according to the present invention, one end of the refrigerant passage is connected to one end of the refrigerant throttle valve c and to the inlet of the evaporator d, and the other end of the refrigerant passage is connected to the other end of the refrigerant throttle valve c and to the outlet of the condenser e, so that a part of the liquid refrigerant may enter the refrigerant heat sink to dissipate heat of the inverter a and enter the evaporator d together with the refrigerant passing through the refrigerant throttle valve c.
Further, as shown in fig. 1, the heat dissipation device of the frequency converter according to the embodiment of the invention further includes a throttle device 60 and a fan 70.
Alternatively, the restriction 60 may be a capillary tube or an electronic expansion valve.
That is, the inverter heat sink 100 of the air conditioner according to the embodiment of the present invention throttles the cooling and dehumidifying evaporator 40 by providing the throttle device 60 as a capillary tube or an electronic expansion valve to reduce the temperature pressure of the cooling and dehumidifying evaporator 40.
Further, as shown in fig. 1, a fan 70 is disposed adjacent to the cooling dehumidifying evaporator 40.
It will be appreciated that the air cooled and dehumidified by the cooling and dehumidifying evaporator 40 is blown into the inverter by the fan 70 to dissipate heat from other electrical devices in the inverter, such as capacitors, reactance, circuit breakers, etc.
Further, as shown in fig. 3, according to an embodiment of the present invention, a control method of a heat dissipating device of a frequency converter includes:
s101, acquiring the temperature of the cooling dehumidifying evaporator and the ambient wet bulb temperature.
Alternatively, in the embodiment of the present invention, the temperature of the cooling dehumidifying evaporator 40 is acquired by a temperature sensor provided above the cooling dehumidifying evaporator 40, and the ambient wet bulb temperature is acquired by a temperature sensor provided inside the inverter.
S102, acquiring tube temperatures of the first switching tube, the second switching tube and the third switching tube.
Alternatively, in the embodiment of the present invention, the tube temperatures of the first switching tube, the second switching tube, and the third switching tube are acquired by temperature sensors provided at the first switching tube, the second switching tube, and the third switching tube, respectively.
S103, adjusting the working state of the cooling and dehumidifying evaporator according to the temperature of the cooling and dehumidifying evaporator and the temperature of the ambient wet bulb.
The operating states of the cooling and dehumidifying evaporator 40 include an on state and an off state.
Specifically, as shown in fig. 4, according to an embodiment of the present invention, according to the temperature of the cooling dehumidifying evaporator and the ambient wet bulb temperature, the operation state of the cooling dehumidifying evaporator is adjusted, including:
and S201, if the temperature of the cooling and dehumidifying evaporator is higher than the ambient wet bulb temperature, the working state of the cooling and dehumidifying evaporator is adjusted to be a closed state.
That is, when the temperature of the cooling dehumidifying evaporator 40 is greater than the ambient wet bulb temperature, the operating state of the cooling dehumidifying evaporator 40 is adjusted to be the off state.
S202, if the temperature of the cooling and dehumidifying evaporator is less than or equal to the ambient wet bulb temperature, the working state of the cooling and dehumidifying evaporator is adjusted to be an on state.
That is, when the temperature of the cooling and dehumidifying evaporator 40 is less than or equal to the ambient wet bulb temperature, the operating state of the cooling and dehumidifying evaporator 40 is adjusted to be an on state.
It should be understood that in the embodiment of the present invention, when the temperature of the cooling and dehumidifying evaporator 40 is less than or equal to the ambient wet bulb temperature, there is a risk of condensation inside the frequency converter, at this time, the working state of the cooling and dehumidifying evaporator 40 is adjusted to be the start state to cool the electronic components inside the frequency converter, and dehumidify the inside of the frequency converter, so as to reduce the risk of condensation inside the frequency converter and improve the reliability of the frequency converter.
And S104, controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and the first preset temperature.
Further, according to an embodiment of the present invention, as shown in fig. 5, according to the tube temperatures of the first switching tube, the second switching tube, and the third switching tube and the first preset temperature, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve are controlled, including:
and S301, if the pipe Wen Dayu of the first switching pipe has a first preset temperature, controlling the first electronic expansion valve to lift the first preset opening.
That is, when the tube Wen Dayu of the first switching tube has a first preset temperature, the first electronic expansion valve 101 is controlled to increase the first preset opening, wherein the first preset temperature can be calibrated according to the normal operating temperature of the switching tube.
It should be understood that, in the embodiment of the present invention, when the tube Wen Dayu of the first switching tube has the first preset temperature, it may be considered that the current heat dissipation requirement of the first switching tube cannot be met by the first radiator 10, and the first electronic expansion valve 101 is controlled to raise the first preset opening degree to increase the refrigerant flow of the first radiator 10, thereby raising the heat dissipation effect of the first radiator 10 and reducing the tube temperature of the first switching tube.
In addition, in the embodiment of the present invention, after the first electronic expansion valve 101 is controlled to raise the first preset opening, if the tube temperature of the first switching tube is still greater than the first preset temperature, the first electronic expansion valve 101 is continuously controlled to raise the first preset opening.
And S302, if the pipe Wen Dayu of the second switching pipe has a first preset temperature, controlling the second electronic expansion valve to lift the first preset opening.
That is, when the tube Wen Dayu of the second switching tube has a first preset temperature, the second electronic expansion valve 201 is controlled to raise the first preset opening degree.
It should be understood that, in the embodiment of the present invention, when the tube Wen Dayu of the second switching tube has the first preset temperature, it may be considered that the current heat dissipation requirement of the second switching tube cannot be met by the second radiator 20, and the second electronic expansion valve 201 is controlled to raise the first preset opening to increase the refrigerant flow of the second radiator 20, thereby raising the heat dissipation effect of the second radiator 20 and reducing the tube temperature of the second switching tube.
In addition, in the embodiment of the present invention, after the second electronic expansion valve 201 is controlled to raise the first preset opening, if the tube temperature of the second switching tube is still greater than the first preset temperature, the second electronic expansion valve 201 is continuously controlled to raise the first preset opening.
And S303, if the pipe Wen Dayu of the third switching pipe has the first preset temperature, controlling the third electronic expansion valve to lift the first preset opening.
That is, when the tube Wen Dayu of the third switching tube has a first preset temperature, the third electronic expansion valve 301 is controlled to raise the first preset opening degree.
It should be understood that, in the embodiment of the present invention, when the tube Wen Dayu of the third switching tube has the first preset temperature, it may be considered that the current heat dissipation requirement of the third switching tube cannot be met by the third radiator 30, and the third electronic expansion valve 301 is controlled to raise the first preset opening degree to increase the refrigerant flow of the third radiator 30, thereby raising the heat dissipation effect of the third radiator 30 and reducing the tube temperature of the third switching tube.
In addition, in the embodiment of the present invention, after the third electronic expansion valve 301 is controlled to raise the first preset opening, if the tube temperature of the third switching tube is still greater than the first preset temperature, the third electronic expansion valve 301 is continuously controlled to raise the first preset opening.
Further, as shown in fig. 5, according to an embodiment of the present invention, according to the tube temperatures of the first switching tube, the second switching tube, and the third switching tube and the first preset temperature, the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve are controlled, further including:
and S304, if the pipe temperature of the first switching pipe is smaller than or equal to a first preset temperature, controlling the first electronic expansion valve to reduce the first preset opening.
That is, when the tube temperature of the first switching tube is less than or equal to the first preset temperature, the first electronic expansion valve 101 is controlled to decrease the first preset opening degree.
It should be understood that, in the embodiment of the present invention, when the tube temperature of the first switching tube is less than or equal to the first preset temperature, the heat dissipation requirement of the first switching tube may be considered to be excessive, and the first electronic expansion valve 101 is controlled to reduce the first preset opening degree to reduce the refrigerant flow of the first radiator 10, thereby reducing the heat dissipation effect of the first radiator 10 and increasing the temperature of the first switching tube.
In addition, in the embodiment of the present invention, after the first electronic expansion valve 101 is controlled to reduce the first preset opening, if the tube temperature of the first switching tube is still less than or equal to the first preset temperature, the first electronic expansion valve 101 is continuously controlled to reduce the first preset opening.
And S305, if the pipe temperature of the second switching pipe is smaller than or equal to the first preset temperature, controlling the second electronic expansion valve to reduce the first preset opening.
That is, when the pipe temperature of the second switching pipe is less than or equal to the first preset temperature, the second electronic expansion valve 201 is controlled to decrease the first preset opening degree.
It should be understood that, in the embodiment of the present invention, when the tube temperature of the second switching tube is less than or equal to the first preset temperature, the heat dissipation requirement of the second switching tube may be considered to be excessive, and the second electronic expansion valve 201 is controlled to reduce the first preset opening degree to reduce the refrigerant flow of the second radiator 20, thereby reducing the heat dissipation effect of the second radiator 20 and increasing the temperature of the second switching tube.
In addition, in the embodiment of the present invention, after the second electronic expansion valve 201 is controlled to reduce the first preset opening, if the tube temperature of the second switching tube is still less than or equal to the first preset temperature, the second electronic expansion valve 201 is continuously controlled to reduce the first preset opening.
And S306, if the pipe temperature of the third switching pipe is smaller than or equal to the first preset temperature, controlling the third electronic expansion valve to reduce the first preset opening.
That is, when the tube temperature of the first switching tube is less than or equal to the first preset temperature, the first electronic expansion valve 101 is controlled to decrease the first preset opening degree.
It should be understood that, in the embodiment of the present invention, when the tube temperature of the third switching tube is less than or equal to the first preset temperature, the heat dissipation requirement of the third switching tube may be considered to be excessive, and the third electronic expansion valve 301 is controlled to reduce the first preset opening degree so as to reduce the refrigerant flow of the third radiator 30, thereby reducing the heat dissipation effect of the third radiator 30 and increasing the temperature of the third switching tube.
In addition, in the embodiment of the present invention, after the third electronic expansion valve 301 is controlled to reduce the first preset opening, if the tube temperature of the third switching tube is still less than or equal to the first preset temperature, the third electronic expansion valve 301 is continuously controlled to reduce the first preset opening.
Specifically, in the embodiment of the present invention, the tube temperatures of the first switching tube, the second switching tube, and the third switching tube are controlled by controlling the opening degrees of the first electronic expansion valve 101, the second electronic expansion valve 201, and the third electronic expansion valve 301. When the tube Wen Dayu of the switching tube is at a first preset temperature, the corresponding electronic expansion valve is controlled to increase the first preset opening degree, so that the flow of the refrigerant passing through the corresponding radiator is increased to improve the heat dissipation effect of the corresponding radiator, and the tube temperature of the corresponding switching tube is reduced. Therefore, the tube temperature of each switching tube is controlled to be the same or similar temperature, so that the current balance through each switching tube is facilitated, and the service life of each switching tube is prolonged.
Further, as shown in fig. 1, according to an embodiment of the present invention, the inverter heat dissipation device 100 further includes: a fourth heat sink 50 for dissipating heat from the first diode and a fourth electronic expansion valve 501 connected to the fourth heat sink 50, as shown in fig. 6, the method further comprises:
s105, acquiring the tube temperature of the first diode.
Alternatively, the tube temperature of the first diode may be acquired by a temperature sensor provided at the first diode.
And S106, controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature.
Specifically, as shown in fig. 7, according to an embodiment of the present invention, controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature includes:
s401, if the tube Wen Dayu of the first diode has the second preset temperature, the fourth electronic expansion valve is controlled to increase the first preset opening.
That is, when the tube Wen Dayu of the first diode has the second preset temperature, the fourth electronic expansion valve 501 is controlled to raise the first preset opening degree.
S402, if the tube temperature of the first diode is smaller than or equal to the second preset temperature, the fourth electronic expansion valve is controlled to reduce the first preset opening.
That is, when the pipe temperature of the first diode is less than or equal to the second preset temperature, the fourth electronic expansion valve 501 is controlled to decrease the first preset opening degree.
It should be noted that, in the embodiment of the present invention, after the fourth electronic expansion valve 501 is controlled to raise the first preset opening, if the tube temperature of the first diode is still greater than the first preset temperature, the fourth electronic expansion valve 501 is continuously controlled to raise the first preset opening, and after the fourth electronic expansion valve 501 is controlled to lower the first preset opening, if the tube temperature of the first diode is still less than or equal to the first preset temperature, the fourth electronic expansion valve 501 is continuously controlled to lower the first preset opening.
In summary, according to the control method of the frequency converter heat dissipation device provided by the embodiment of the invention, the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature are obtained, and the tube temperatures of the first switch tube, the second switch tube and the third switch tube are obtained, so that the working state of the cooling and dehumidifying evaporator is adjusted according to the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature, and the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve are controlled according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and the first preset temperature, so that the heat dissipation performance of the frequency converter heat dissipation device is ensured, the condensation risk of the frequency converter heat dissipation device is avoided, and the reliability is improved.
Fig. 8 is a block diagram of a control device of a heat dissipating device of a frequency converter according to an embodiment of the present invention.
As shown in fig. 8, a control device 1000 of the inverter heat sink includes: the device comprises a first acquisition module 1, a second acquisition module 2, an adjustment module 3 and a control module 4.
The first acquisition module 1 is used for acquiring the temperature of the cooling dehumidifying evaporator and the ambient wet bulb temperature; the second acquisition module 2 is used for acquiring the tube temperatures of the first switching tube, the second switching tube and the third switching tube; the adjusting module 3 adjusts the working state of the cooling and dehumidifying evaporator 40 according to the temperature of the cooling and dehumidifying evaporator 40 and the temperature of the ambient wet bulb; and the control module 4 controls the first electronic expansion valve 101, the second electronic expansion valve 201 and the third electronic expansion valve 301 according to the tube temperatures of the first switching tube, the second switching tube and the third switching tube and the first preset temperature.
Further, according to an embodiment of the present invention, the adjusting module 3 is further configured to adjust the working state of the cooling and dehumidifying evaporator 40 to the off state if the temperature of the cooling and dehumidifying evaporator 40 is greater than the ambient wet bulb temperature; if the temperature of the cooling dehumidifying evaporator 40 is less than or equal to the ambient wet bulb temperature, the operating state of the cooling dehumidifying evaporator 40 is adjusted to an on state.
Further, according to an embodiment of the invention, the control module 4 is also configured to: if the tube Wen Dayu of the first switching tube has a first preset temperature, controlling the first electronic expansion valve 101 to increase a first preset opening; if the tube Wen Dayu of the second switching tube has a first preset temperature, controlling the second electronic expansion valve 201 to increase the first preset opening; if the tube Wen Dayu of the third switching tube has a first preset temperature, the third electronic expansion valve 301 is controlled to increase the first preset opening.
Further, according to an embodiment of the present invention, the control module 4 is further configured to control the first electronic expansion valve 101 to reduce the first preset opening degree if the tube temperature of the first switching tube is less than or equal to the first preset temperature; if the tube temperature of the second switch tube is less than or equal to the first preset temperature, controlling the second electronic expansion valve 201 to reduce the first preset opening; if the tube temperature of the third switching tube is less than or equal to the first preset temperature, the third electronic expansion valve 301 is controlled to reduce the first preset opening.
Further, as shown in fig. 9, according to an embodiment of the present invention, the control device 1000 further includes: and a third acquisition module 5.
The third obtaining module 5 is used for obtaining the tube temperature of the first diode; the control module 4 is further configured to control the fourth electronic expansion valve 501 according to the tube temperature of the first diode and the second preset temperature.
Further, according to an embodiment of the present invention, the control module 4 is further configured to control the fourth electronic expansion valve 501 to increase the first preset opening degree if the tube Wen Dayu of the first diode has the second preset temperature; if the tube temperature of the first diode is less than or equal to the second preset temperature, the fourth electronic expansion valve 501 is controlled to reduce the first preset opening.
It should be noted that, the specific implementation manner of the control device of the frequency converter heat dissipation device in the embodiment of the present invention corresponds to the control method of the frequency converter heat dissipation device one by one, which is not described herein again.
In summary, according to the control device for the heat dissipation device of the frequency converter according to the embodiment of the invention, the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature are obtained through the first obtaining module, and the tube temperatures of the first switch tube, the second switch tube and the third switch tube are obtained through the second obtaining module, further, the working state of the cooling and dehumidifying evaporator is adjusted through the adjusting module according to the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature, and the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve are controlled through the control module according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and the first preset temperature, so that the condensation risk of the heat dissipation device of the frequency converter is avoided while the heat dissipation performance of the heat dissipation device of the frequency converter is ensured, and the reliability is improved.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it should be understood that 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 the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. The control method of the frequency converter heat dissipation device is characterized in that the frequency converter heat dissipation device comprises the following steps: a first radiator for radiating heat from a first switching tube, a second radiator for radiating heat from a second switching tube, a third radiator for radiating heat from a third switching tube, a first electronic expansion valve connected to the first radiator, a second electronic expansion valve connected to the second radiator, a third electronic expansion valve connected to the third radiator, a fourth radiator for radiating heat from a first diode and a fourth electronic expansion valve connected to the fourth radiator, and a cooling and dehumidifying evaporator, the method comprising:
Acquiring the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature, wherein a temperature sensor for acquiring the temperature of the cooling and dehumidifying evaporator is arranged on the cooling and dehumidifying evaporator, and a temperature sensor for acquiring the ambient wet bulb temperature is arranged on a frequency converter;
acquiring tube temperatures of the first switching tube, the second switching tube and the third switching tube;
adjusting the working state of the cooling and dehumidifying evaporator according to the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature, wherein if the temperature of the cooling and dehumidifying evaporator is greater than the ambient wet bulb temperature, the working state of the cooling and dehumidifying evaporator is adjusted to be a closed state;
acquiring the tube temperature of the first diode;
controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and a first preset temperature; and controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature.
2. The method of claim 1, wherein said adjusting the operating condition of said cooling and dehumidifying evaporator based on the temperature of said cooling and dehumidifying evaporator and said ambient wet bulb temperature further comprises:
And if the temperature of the cooling and dehumidifying evaporator is less than or equal to the ambient wet bulb temperature, adjusting the working state of the cooling and dehumidifying evaporator to be an opening state.
3. The method of claim 1, wherein controlling the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve based on the tube temperatures of the first switching tube, the second switching tube, and the third switching tube and a first preset temperature comprises:
if the first preset temperature is the first preset temperature of the tube Wen Dayu of the first switching tube, controlling the first electronic expansion valve to increase a first preset opening;
if the first preset temperature is the pipe Wen Dayu of the second switching tube, controlling the second electronic expansion valve to increase the first preset opening;
and if the pipe Wen Dayu of the third switching tube has the first preset temperature, controlling the third electronic expansion valve to increase the first preset opening.
4. The method of claim 3, wherein controlling the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve based on the tube temperatures of the first switching tube, the second switching tube, and the third switching tube and a first preset temperature, further comprises:
If the tube temperature of the first switch tube is smaller than or equal to the first preset temperature, controlling the first electronic expansion valve to reduce a first preset opening;
if the tube temperature of the second switching tube is smaller than or equal to the first preset temperature, controlling the second electronic expansion valve to reduce the first preset opening;
and if the pipe temperature of the third switching pipe is smaller than or equal to the first preset temperature, controlling the third electronic expansion valve to reduce the first preset opening.
5. The method of claim 1, wherein adjusting the fourth electronic expansion valve based on the tube temperature of the first diode and a second preset temperature comprises:
if the second preset temperature of the tube Wen Dayu of the first diode is higher than the first preset opening, controlling the fourth electronic expansion valve to increase the first preset opening;
and if the tube temperature of the first diode is smaller than or equal to the second preset temperature, controlling the fourth electronic expansion valve to reduce the first preset opening.
6. A control device for a radiator of a frequency converter, the radiator comprising: a first radiator for radiating heat from a first switching tube, a second radiator for radiating heat from a second switching tube, a third radiator for radiating heat from a third switching tube, a first electronic expansion valve connected to the first radiator, a second electronic expansion valve connected to the second radiator, a third electronic expansion valve connected to the third radiator, a fourth radiator for radiating heat from a first diode and a fourth electronic expansion valve connected to the fourth radiator, and a cooling and dehumidifying evaporator, the control device comprising:
The first acquisition module is used for acquiring the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature, wherein a temperature sensor for acquiring the temperature of the cooling and dehumidifying evaporator is arranged on the cooling and dehumidifying evaporator, and a temperature sensor for acquiring the ambient wet bulb temperature is arranged on a frequency converter;
the second acquisition module is used for acquiring the tube temperatures of the first switching tube, the second switching tube and the third switching tube;
the adjusting module is used for adjusting the working state of the cooling and dehumidifying evaporator according to the temperature of the cooling and dehumidifying evaporator and the ambient wet bulb temperature, wherein if the temperature of the cooling and dehumidifying evaporator is higher than the ambient wet bulb temperature, the working state of the cooling and dehumidifying evaporator is adjusted to be a closed state;
the third acquisition module is used for acquiring the tube temperature of the first diode; the method comprises the steps of,
the control module is used for controlling the first electronic expansion valve, the second electronic expansion valve and the third electronic expansion valve according to the tube temperatures of the first switch tube, the second switch tube and the third switch tube and a first preset temperature; and controlling the fourth electronic expansion valve according to the tube temperature of the first diode and the second preset temperature.
7. The control device of claim 6, wherein the adjustment module is further configured to adjust the operating state of the cooling and dehumidifying evaporator to an on state if the temperature of the cooling and dehumidifying evaporator is less than or equal to the ambient wet bulb temperature.
8. The control device of claim 6, wherein the control module is further configured to: if the first preset temperature is the first preset temperature of the tube Wen Dayu of the first switching tube, controlling the first electronic expansion valve to increase a first preset opening;
if the first preset temperature is the pipe Wen Dayu of the second switching tube, controlling the second electronic expansion valve to increase the first preset opening;
and if the pipe Wen Dayu of the third switching tube has the first preset temperature, controlling the third electronic expansion valve to increase the first preset opening.
9. The control device of claim 6, wherein the control module is further configured to control the first electronic expansion valve to decrease a first preset opening degree if a tube temperature of the first switching tube is less than or equal to the first preset temperature;
if the tube temperature of the second switching tube is smaller than or equal to the first preset temperature, controlling the second electronic expansion valve to reduce the first preset opening;
And if the pipe temperature of the third switching pipe is smaller than or equal to the first preset temperature, controlling the third electronic expansion valve to reduce the first preset opening.
10. The control device of claim 6, wherein the control module is further configured to control the fourth electronic expansion valve to increase a first preset opening degree if the second preset temperature of the tube Wen Dayu of the first diode;
and if the tube temperature of the first diode is smaller than or equal to the second preset temperature, controlling the fourth electronic expansion valve to reduce the first preset opening.
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CN109713881A (en) * 2019-02-01 2019-05-03 广东美的暖通设备有限公司 Frequency converter
CN210123181U (en) * 2019-05-09 2020-03-03 广东美的暖通设备有限公司 Air conditioner and frequency converter heat dissipation device thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104566840A (en) * 2013-10-16 2015-04-29 海尔集团公司 Coolant radiating device, air conditioner with coolant radiating device and temperature control method of coolant radiating device
CN104089346A (en) * 2014-07-07 2014-10-08 珠海格力电器股份有限公司 Air conditioner and air conditioner power component cooling method
CN107228455A (en) * 2017-06-09 2017-10-03 青岛海尔空调器有限总公司 A kind of air conditioner and control method
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