Thermal management control method of electric control component in air conditioner, electric control component and air conditioner

Abstract

The invention discloses a heat management control method of an electric control component in an air conditioner, the electric control component and the air conditioner, the air conditioner further comprises a shell, a compressor, a first heat exchanger, a second heat exchanger, an air supply fan and an air exhaust fan, and the electric control component is arranged on an air inlet path of the air exhaust fan. The electric control component comprises an electric control box, a circuit board, a heating device and an air duct cover, the electric control box adopts a closed design, the circuit board is accommodated in the electric control box, the heating device comprises a PFC circuit arranged on the circuit board, and a capacitive device and an inductive device in the PFC circuit are accommodated in the electric control box. The electric power of the air conditioner is obtained; and the carrier frequency of the PFC circuit is controlled according to the ambient temperature, and the rotating speed of the exhaust fan is controlled according to the ambient temperature and the electric power. According to the control method, the service life of capacitive and inductive devices can be prolonged, and the heat dissipation problem in the electric control box is solved under the condition that the power of the air conditioner is not reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a thermal management control method for an electric control component in an air conditioner, a computer-readable storage medium, an electric control component and an air conditioner. Background Art

[0002] As living standards gradually improve, people pay more and more attention to the quality of life. Especially in the hot summer, installing air conditioners in the kitchen can make people feel more comfortable when cooking in the kitchen. Since the kitchen air conditioner is placed in the kitchen, the electric control box needs to be sealed to avoid oil fume pollution. In order to improve safety, the pressure of the compressor is higher than that of traditional compressors when it is working. The electric power of the matching electric control device must be increased accordingly. The increase in electric power and in a closed electric control environment brings challenges to the thermal design of power heating devices.

[0003] Especially under higher electric power, the temperature rise and heat generation of the sealed electric control box is difficult to solve, especially for the life of electrolytic capacitors. Without a better heat dissipation method, high temperature will shorten its life. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the first object of the present invention is to propose a thermal management control method for an electric control component in an air conditioner, by obtaining the ambient temperature of a capacitive device and the electric power of the air conditioner, and then controlling the carrier frequency of a PFC circuit according to the ambient temperature, and controlling the speed of an exhaust fan according to the ambient temperature and the electric power, thereby improving the service life of the capacitive and inductive devices, and solving the heat dissipation problem inside the electric control box without reducing the power of the air conditioner.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide an electronic control component.

[0007] A fourth object of the present invention is to provide an air conditioner.

[0008] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a thermal management control method for electronically controlled components in an air conditioner, the method comprising: obtaining the ambient temperature of the capacitive device and obtaining the electric power of the air conditioner; controlling the carrier frequency of the PFC circuit according to the ambient temperature, and controlling the speed of the exhaust fan according to the ambient temperature and the electric power.

[0009] According to the thermal management control method of the electric control component in the air conditioner according to the embodiment of the present invention, the ambient temperature of the capacitive device and the electric power of the air conditioner are first obtained, and then the carrier frequency of the PFC circuit is controlled according to the ambient temperature, and the speed of the exhaust fan is controlled according to the ambient temperature and the electric power. Therefore, the method can improve the service life of the capacitive and inductive devices and solve the heat dissipation problem inside the electric control box without reducing the power of the air conditioner.

[0010] In addition, the thermal management control method of the electric control component in the air conditioner according to the above embodiment of the present invention may also have the following additional technical features:

[0011] According to an embodiment of the present invention, there is a positive correlation between the carrier frequency of the PFC circuit and the rotation speed of the exhaust fan.

[0012] According to an embodiment of the present invention, controlling the carrier frequency of the PFC circuit according to the ambient temperature includes: determining a temperature interval in which the ambient temperature is located; and adjusting the carrier frequency of the PFC circuit to a corresponding target frequency according to the temperature interval in which the ambient temperature is located.

[0013] According to one embodiment of the present invention, the rotational speed of the exhaust fan is controlled according to the ambient temperature and the electric power, including: determining the power range in which the electric power is located while adjusting the carrier frequency of the PFC circuit to the corresponding target frequency, and controlling the rotational speed of the exhaust fan according to the power range in which the electric power is located.

[0014] According to one embodiment of the present invention, when the PFC circuit operates at a first target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than a first preset power, controlling the speed of the exhaust fan to increase to the first preset speed; if the electric power is less than or equal to the first preset power, controlling the speed of the exhaust fan to remain unchanged.

[0015] According to one embodiment of the present invention, when the PFC circuit operates at the second target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than or equal to the first preset power and less than the second preset power, the speed of the exhaust fan is controlled to increase to the second preset speed; if the electric power is less than the first preset power, the speed of the exhaust fan is controlled to remain unchanged; if the electric power is greater than or equal to the second preset power, the speed of the exhaust fan is controlled to increase to a third preset speed, wherein the third preset speed is greater than the second preset speed.

[0016] According to one embodiment of the present invention, when the PFC circuit operates at a third target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than or equal to the second preset power and less than the third preset power, the speed of the exhaust fan is controlled to increase to the third preset speed; if the electric power is less than the second preset power, the speed of the exhaust fan is controlled to remain unchanged; if the electric power is greater than or equal to the third preset power, the speed of the exhaust fan is controlled to increase to a fourth preset speed, wherein the fourth preset speed is greater than the third preset speed.

[0017] According to one embodiment of the present invention, when the PFC circuit operates at a fourth target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than or equal to the third preset power, the speed of the exhaust fan is controlled to increase to a fourth preset speed; if the electric power is less than the third preset power, the speed of the exhaust fan is controlled to remain unchanged.

[0018] To achieve the above-mentioned purpose, the second aspect of the embodiment of the present invention proposes a computer-readable storage medium, on which a thermal management control program for electronic control components in an air conditioner is stored. When the thermal management control program is executed by a processor, the thermal management control method for electronic control components in the air conditioner is implemented.

[0019] According to the computer-readable storage medium of an embodiment of the present invention, by implementing the above-mentioned thermal management control method of the electronic control components in the air conditioner during execution, the service life of the capacitive and inductive components can be improved, and the heat dissipation problem inside the electronic control box can be solved without reducing the power of the air conditioner.

[0020] To achieve the above-mentioned purpose, an embodiment of the third aspect of the present invention proposes an electronic control component, including a memory, a processor, and a thermal management control program for the electronic control component in an air conditioner stored in the memory and executable on the processor. When the processor executes the thermal management control program, the above-mentioned thermal management control method for the electronic control component in the air conditioner is implemented.

[0021] The electronic control components according to the embodiments of the present invention can improve the service life of capacitive and inductive components by executing the above-mentioned thermal management control method of electronic control components in an air conditioner, and solve the heat dissipation problem inside the electronic control box without reducing the power of the air conditioner.

[0022] To achieve the above-mentioned purpose, an air conditioner proposed in a fourth aspect of an embodiment of the present invention comprises: a housing, a compressor, a first heat exchanger, a second heat exchanger, an air supply fan and an exhaust fan, wherein the housing has an air supply duct and an exhaust duct isolated from each other, the first heat exchanger is arranged in the air supply duct, the second heat exchanger is arranged in the exhaust duct, the first heat exchanger and the second heat exchanger are both connected to the compressor and serve as a condenser and an evaporator respectively, the inlet of the air supply fan is connected to the air supply duct and the outlet of the air supply fan is connected to the indoor side, the inlet of the exhaust fan is connected to the exhaust duct and the outlet of the exhaust fan is connected to the outdoor side; The electric control component is arranged on the air inlet path of the exhaust fan, the electric control component comprises an electric control box, a circuit board, a heating device and an air duct cover, the electric control box adopts a closed design, the circuit board is accommodated in the electric control box, the heating device comprises a PFC circuit arranged on the circuit board, the capacitive device and the inductive device in the PFC circuit are accommodated in the electric control box, the circuit board is configured to obtain the ambient temperature of the capacitive device and the electric power of the air conditioner, and control the carrier frequency of the PFC circuit according to the ambient temperature, and control the rotation speed of the exhaust fan according to the ambient temperature and the electric power.

[0023] In the air conditioner according to the embodiment of the present invention, the circuit board is configured to obtain the ambient temperature of the capacitive device and the electric power of the air conditioner, and to control the carrier frequency of the PFC circuit according to the ambient temperature, and to control the rotation speed of the exhaust fan according to the ambient temperature and the electric power, thereby increasing the service life of the capacitive and inductive devices and solving the heat dissipation problem inside the electric control box without reducing the power of the air conditioner.

[0024] In addition, the air conditioner according to the above embodiment of the present invention may also have the following additional technical features:

[0025] According to an embodiment of the present invention, the capacitive device includes a first capacitive device, an end of the first capacitive device away from the circuit board is a distal end of the first capacitive device, and a distance between the distal end of the first capacitive device and the electric control box is 5mm-10mm.

[0026] According to one embodiment of the present invention, the capacitive device includes a first capacitive device, an end of the first capacitive device away from the circuit board is the distal end of the first capacitive device, the electrical control box includes an inner shell and an outer shell covering the inner shell, the inner shell is an insulating shell and is formed with a second opening, the second opening is opposite to the distal end of the first capacitive device, and the outer shell is a metal shell and blocks and closes the second opening.

[0027] According to one embodiment of the present invention, the capacitive device includes a first capacitive device, the inductive device includes a first inductive device, the first inductive device and the first capacitive device are located on the same side of the circuit board in the thickness direction, and the height of the first inductive device in the thickness direction of the circuit board is higher than the height of the first capacitive device, the electric control box includes a first box wall, the first box wall is located on a side of the first inductive device away from the circuit board, and the distance between a first part of the first box wall corresponding to the first inductive device and the circuit board is greater than the distance between a second part of the first box wall corresponding to the first capacitive device and the circuit board.

[0028] According to an embodiment of the present invention, the refrigerant in the compressor includes carbon dioxide.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a flow chart of a thermal management control method of an electric control component in an air conditioner according to an embodiment of the present invention;

[0031] Figure 2 is a three-dimensional appearance diagram of an air conditioner according to an embodiment of the present invention;

[0032] Figure 3 is a cross-sectional view of an air conditioner according to an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of the structure of an electric control component according to an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of the structure of an electric control component according to an embodiment of the present invention;

[0035] Figure 6 A flowchart of a method for controlling thermal management of an electric control component in an air conditioner according to a specific example of the present invention;

[0036] Figure 7 FIG. 4 is a block diagram of an electric control component according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] In one embodiment of the present invention, Figure 2 and Figure 3 As shown, the air conditioner 1000 includes a housing 200, a compressor 300, a first heat exchanger 400, a second heat exchanger 500, an air supply fan 600 and an exhaust fan 700. The housing 200 has an air supply duct 210 and an exhaust duct 220 that are isolated from each other. The first heat exchanger 400 is arranged in the air supply duct 210, and the second heat exchanger 500 is arranged in the exhaust duct 220. The first heat exchanger 400 and the second heat exchanger 500 are both connected to the compressor 300 and serve as an evaporator and a condenser respectively. The inlet of the air supply fan 600 is connected to the air supply duct 210 and the outlet of the air supply fan 600 is connected to the indoor side, the inlet of the exhaust fan 700 is connected to the exhaust duct 220 and the outlet of the exhaust fan 700 is connected to the outdoor side, and the electric control component 100 is arranged on the air inlet path of the exhaust fan 700.

[0039] It is worth noting that the air conditioner 1000 can cool the indoor side or heat the indoor side. When the air conditioner 1000 cools the indoor side, the first heat exchanger 400 acts as an evaporator, the second heat exchanger 500 acts as a condenser, the airflow provided by the air supply fan 600 passes through the evaporator to release heat, and the cold air flows into the indoor side along the air supply duct 210, thereby cooling the indoor side; the airflow provided by the exhaust fan 700 passes through the condenser to take away the heat of the condenser, and the hot air flows to the outdoor side along the exhaust duct 220. When the air conditioner 1000 heats the indoor side, the first heat exchanger 400 acts as a condenser, the second heat exchanger 500 acts as an evaporator, the airflow provided by the air supply fan 600 passes through the condenser to absorb heat, and the hot air flows into the indoor side along the air supply duct 210, thereby heating the indoor side; the airflow provided by the exhaust fan 700 passes through the evaporator to release heat, and the cold air flows to the outdoor side along the exhaust duct 220. Alternatively, the air conditioner may have only one of the above two functions.

[0040] The electric control component 100 is arranged on the air inlet path of the exhaust fan 700. When the air supply fan 600 provides a flowing airflow to the second heat exchanger 500, the air supply fan 600 also causes an airflow to flow through the electric control component 100 to dissipate heat from the electric control component 100. The flowing airflow provided by the air supply fan 600 flows through the heat dissipation air duct 50 to perform heat exchange with the electric control box 1, thereby improving the heat dissipation capacity of the heating device 3 in the electric control component 100 and further improving the working reliability of the electric control component 100. Since the electric control component 100 is arranged on the air inlet path of the exhaust fan 700, the electric control component 100 will not interfere with the air supply on the indoor side, and will not affect the indoor cooling or heating efficiency of the air conditioner 1000.

[0041] The air conditioner 1000 of the embodiment of the present invention can achieve heat dissipation of the electric control component 100 by using the exhaust fan 700, without setting an additional exhaust fan, simplifying the structure of the air conditioner 1000, reducing the volume and manufacturing cost of the air conditioner 1000, and facilitating the installation of the air conditioner 1000. In addition, it is also avoided that the exhaust fan occupies the internal space of the housing 200, which is beneficial to the flow of air in the exhaust duct 220 and the air supply duct 210, and avoiding reducing the air supply volume of the air conditioner 1000.

[0042] In one embodiment of the present invention, Figure 2 and Figure 4 As shown, the electric control component 100 may include an electric control box 1, a circuit board 2, a heating device 3 and an air duct cover 4. The electric control box 1 adopts a closed design, the circuit board 2 is accommodated in the electric control box 1, the heating device 3 includes a PFC circuit arranged on the circuit board 2, and the capacitive device 32 and the inductive device 21 in the PFC circuit are accommodated in the electric control box 1. The air duct cover 4 is arranged outside the electric control box 1, and a heat dissipation air duct 50 is formed between the electric control box 1 and the air duct cover 4 itself or together with the electric control box 1 defines an air inlet 51 of the heat dissipation air duct 50.

[0043] When the air conditioner 1000 is operated in cooling mode, the compressor 300, the air supply fan 600 and the exhaust fan 700 of the air conditioner 1000 are all started and operated normally. The negative pressure generated by the rotation of the exhaust fan 700 will suck in the external natural wind, a part of which participates in the heat exchange of the air conditioner 1000 and discharges the heat of the compressor 300, and the other part can absorb and discharge the heat generated by the electric control box 100. Figure 2 As shown, the direction of the arrow is that the natural wind enters the exhaust fan 700 from the air duct cover 4 and is then discharged from the exhaust duct 220 .

[0044] Combination Figure 3 and Figure 4 As shown, the heat sink 7 is located at the upper end, and the inductive device 31 (such as a PFC inductor) and the capacitive device 32 (such as a high-voltage large capacitor) are located at the lower end. It should be noted that the positions of the heat sink 7, the inductive device 31 and the capacitive device 32 can be interchanged, that is, the inductive device 31 and the capacitive device 32 are located at the upper end, and the heat sink 7 is located at the lower end. The natural wind with a relatively low temperature first enters from the air outlet 51, passes through the heat dissipation duct 50, and takes away the heat generated by the inductive device 31 and the capacitive device 32 when they are working. After heat exchange between the fins of the heat sink 7, it can be converted into natural wind with a higher temperature and enter the interior of the air conditioner 1000. Then, the exhaust fan 700 can drive the rotation of the fan blades, and the negative pressure generated will discharge the natural wind with a higher temperature from the exhaust duct 220 of the exhaust fan 700, thereby completing the entire heat dissipation process.

[0045] In some embodiments of the present invention, Figure 4-Figure 5As shown, a power device 6 is also provided on the circuit board 2. The power device 6 generates heat when working. The power device 6 is arranged on the circuit board 2 and enclosed in the electric control box 1. Therefore, the electric control component 100 also includes a heat sink 7. The heat sink 7 cooperates with at least one power device 6 for heat transfer, and at least part of the heat sink 7 is located outside the electric control box 1. The heat sink 7 conducts the heat of the power device 6 to the outside of the electric control box 1, thereby improving the heat dissipation capacity of the power device 6.

[0046] In some embodiments of the present invention, the power device 6 includes but is not limited to: a compressor IPM (IPM is the abbreviation of Intelligent Power Module), a fan IPM (IPM is the abbreviation of Intelligent Power Module), an IGBT (Insulated Gate Bipolar Transistor), a bridge stack and other relatively small and short components.

[0047] In some embodiments of the present invention, the heat sink 7 includes heat dissipation fins, the power device 6 conducts heat to the heat dissipation fins, and the heat dissipation airflow flows through the heat dissipation fins to perform heat exchange with the heat dissipation fins, taking away the heat, thereby improving the heat dissipation effect of the power device 6. It is worth noting that the method of "heat transfer coordination" is not limited, for example, it can be direct or indirect contact heat transfer, or it can be heat radiation heat transfer with a small gap, etc.

[0048] The following describes a thermal management control method for an electric control component in an air conditioner, a computer-readable storage medium, an electric control component, and an air conditioner according to embodiments of the present invention with reference to the accompanying drawings.

[0049] Figure 1 4 is a flow chart of a thermal management control method of an electric control component in an air conditioner according to an embodiment of the present invention.

[0050] like Figure 1 As shown, the thermal management control method of the electric control component in the air conditioner according to the embodiment of the present invention may include the following steps:

[0051] S1, obtain the ambient temperature of the capacitive device and obtain the electric power of the air conditioner.

[0052] S2, controls the carrier frequency of the PFC circuit according to the ambient temperature, and controls the speed of the exhaust fan according to the ambient temperature and the electric power.

[0053] Specifically, in order to better dissipate the heat of capacitive devices and extend the service life of capacitive devices, the carrier frequency of the PFC circuit can be controlled, and the speed of the exhaust fan can be controlled according to the ambient temperature and electric power, so as to solve the problem of heat dissipation of capacitive devices without reducing the system power.

[0054] The service life of a capacitive device can be determined using the following formula (1):

[0055]

[0056] Among them, Lx represents the service life value of the capacitive device, L0 represents the rated life, which can be specified as 2000H, T0 represents the maximum rated working temperature, which can be 105 degrees, Tx represents the ambient temperature within xcm around the actual capacitor (x can be 1, 2, etc.), ΔT0 represents the core temperature rise difference caused by the rated ripple current, which is generally 5 degrees, and ΔTx represents the core temperature rise caused by the application of ripple current under the working conditions of the capacitive device.

[0057] It can be seen from the above formula (1) that in order to increase the life of the capacitive device, it is necessary to reduce the ambient temperature around the high-capacitance device and reduce the ripple current. It should be noted that the larger the ripple current, the higher the core temperature rise caused by it.

[0058] Therefore, in order to improve the life of the capacitive device, the ambient temperature of the capacitive device can be obtained first, for example, by placing a temperature sensor next to the capacitive device and obtaining the ambient temperature of the capacitive device through the temperature sensor. Then the electric power of the air conditioner can be obtained, such as by collecting the sampling resistance of the PFC circuit through the MCU (Microcontroller Unit, micro control unit), and then calculating the electric power of the air conditioner based on the resistance and voltage, or the electric power of the air conditioner can be obtained through a power meter, etc.

[0059] After obtaining the ambient temperature of the capacitive device and the electric power of the air conditioner, the carrier frequency of the PFC circuit can be controlled according to the ambient temperature. The frequency of turning on and off the switch in the PFC (Power Factor Correction) circuit can be called the carrier frequency of the PFC. If the ripple component of the current is too large and exceeds the maximum allowable ripple current of the capacitive device, it will cause the capacitive device to burn out. Therefore, the carrier frequency of the PFC circuit can be controlled to control the ripple current (referring to the high-order harmonic components in the current). For example, when the ambient temperature is high, the ripple current can be reduced by increasing the carrier frequency of the PFC, thereby reducing the temperature rise of the capacitive device.

[0060] After the carrier frequency of the PFC circuit is controlled, if the carrier frequency of the PFC is increased, the IGBT (Insulated Gate Bipolar Transistor) will generate a lot of heat and the temperature will rise. Therefore, the speed of the exhaust fan can also be controlled. By increasing the speed of the exhaust fan, the temperature of the IGBT can be simultaneously reduced through the heat sink. The speed of the exhaust fan can be controlled according to the ambient temperature and electric power. For example, when the ambient temperature is high and the electric power is large, the speed of the exhaust fan is increased. The exhaust fan drives the fan blades to move at high speed. The negative pressure generated by the exhaust fan discharges the natural wind with a higher temperature from the exhaust port of the exhaust fan, and at the same time can reduce the temperature of the IGBT.

[0061] Thus, the ambient temperature of the capacitive device and the electric power of the air conditioner are obtained, and then the carrier frequency of the PFC circuit is controlled according to the ambient temperature, and the speed of the exhaust fan is controlled according to the ambient temperature and the electric power. This can increase the service life of the capacitive and inductive devices and solve the heat dissipation problem inside the electric control box without reducing the power of the air conditioner.

[0062] According to an embodiment of the present invention, there is a positive correlation between the carrier frequency of the PFC circuit and the rotation speed of the exhaust fan.

[0063] Specifically, the carrier frequency of the PFC circuit is positively correlated with the speed of the exhaust fan, that is, the higher the carrier frequency of the PFC circuit, the greater the speed of the exhaust fan, and the lower the carrier frequency of the PFC circuit, the smaller the speed of the exhaust fan. Therefore, when the carrier frequency is high, by increasing the speed of the exhaust fan, the capacitive devices in the PFC circuit can dissipate heat faster and reduce the heat generation of the IGBT.

[0064] According to an embodiment of the present invention, controlling the carrier frequency of the PFC circuit according to the ambient temperature includes: determining a temperature interval of the ambient temperature; and adjusting the carrier frequency of the PFC circuit to a corresponding target frequency according to the temperature interval of the ambient temperature.

[0065] Specifically, when the carrier frequency of the PFC circuit is controlled according to the ambient temperature, the temperature range of the ambient temperature of the capacitive device can be determined first. For example, it can be divided into four temperature ranges, such as a temperature below 55 degrees (less than 50 degrees) can be used as a first temperature range, a temperature between 55 and 60 degrees (greater than or equal to 55 degrees and less than 60 degrees) can be used as a second temperature range, a temperature between 60 and 65 degrees (greater than or equal to 65 degrees and less than 65 degrees) can be used as a third temperature range, and a temperature above 65 degrees (greater than 65 degrees) can be used as a fourth temperature range.

[0066] For example, when the ambient temperature T1 around the high-voltage large capacitor obtained by the temperature sensor is 40 degrees, it can be determined that the ambient temperature is in the first temperature range. If the ambient temperature T1 around the high-voltage large capacitor obtained by the temperature sensor is 58 degrees, it can be determined that the ambient temperature is in the second temperature range. If the ambient temperature T1 around the high-voltage large capacitor obtained by the temperature sensor is 62 degrees, it can be determined that the ambient temperature is in the third temperature range. If the ambient temperature T1 around the high-voltage large capacitor obtained by the temperature sensor is 70 degrees, it can be determined that the ambient temperature is in the fourth temperature range.

[0067] After determining the temperature range of the ambient temperature, the carrier frequency of the PFC circuit can be adjusted to the corresponding target frequency according to the temperature range of the ambient temperature. For example, different temperature ranges correspond to different carrier frequencies. When the temperature is higher, the carrier frequency of the PFC circuit is higher, thereby reducing the ripple current (the larger the ripple current, the higher the temperature rise of the capacitor core). When the temperature is lower, the carrier frequency of the PFC circuit is lower.

[0068] Taking the division of temperature intervals according to the above temperature intervals as an example, when the ambient temperature is in the first temperature interval, the ambient temperature is low at this time, and the carrier frequency of the PFC circuit can be adjusted to a lower frequency, for example, the carrier frequency of the PFC circuit can be adjusted to 45Khz; when the ambient temperature is in the second temperature interval, the ambient temperature rises a little, and the carrier frequency of the PFC circuit can be adjusted higher, for example, the carrier frequency of the PFC circuit can be adjusted to 55Khz; when the ambient temperature is in the third temperature interval, the ambient temperature rises again, and the carrier frequency of the PFC circuit can be adjusted higher again, for example, the carrier frequency of the PFC circuit can be adjusted to 60Khz; when the ambient temperature is in the fourth temperature interval, the ambient temperature is in a higher temperature interval, and the carrier frequency of the PFC circuit can be adjusted to a higher frequency, for example, the carrier frequency of the PFC circuit can be adjusted to 65Khz. Therefore, by controlling the carrier frequency of the PFC circuit according to the ambient temperature, when the ambient temperature is high, the carrier frequency of the PFC circuit is increased, thereby reducing the ripple current in the circuit and preventing the ripple component of the current from being too large and exceeding the maximum allowable ripple current of the capacitor, which will cause the capacitor to burn out.

[0069] It should be noted that when dividing the temperature interval, the temperature interval can be divided in a proportional manner or not in a proportional manner, such as dividing the interval in a step-type manner, which will not be described here. In addition, the selection of the temperature value for the temperature interval division can also select the corresponding temperature value according to the actual situation.

[0070] According to one embodiment of the present invention, the speed of the exhaust fan is controlled according to the ambient temperature and the electric power, including: when the carrier frequency of the PFC circuit is adjusted to the corresponding target frequency, the power range of the electric power is determined, and the speed of the exhaust fan is controlled according to the power range of the electric power.

[0071] Specifically, when the speed of the exhaust fan is controlled according to the ambient temperature and the electric power, the carrier frequency of the PFC circuit is first adjusted to the corresponding target frequency according to the ambient temperature. After the carrier frequency of the PFC circuit is adjusted to the corresponding target frequency, it is necessary to determine the power range in which the electric power is located. For example, it can be divided into four power ranges, such as power below 2000W (less than 2000W) can be used as the first power range, power between 2000-2200W (greater than or equal to 2000W and less than 2200W) can be used as the second power range, power between 2200-2500W (greater than or equal to 2200W and less than 2500W) can be used as the third power range, and power above 2500W (greater than 2500W) can be used as the fourth power range.

[0072] For example, if the electric power obtained after calculation based on the relationship between voltage and resistance is 1800W, it can be determined that the electric power is in the first power range. If the electric power obtained is 2100W, it can be determined that the electric power is in the second power range. If the electric power obtained is 2400W, it can be determined that the electric power is in the third power range. If the electric power obtained is 2600W, it can be determined that the electric power is in the fourth power range.

[0073] After determining the power range of the electric power, the speed of the exhaust fan can be controlled according to the power range of the electric power. For example, different power ranges correspond to different exhaust fan speeds. When the electric power is greater, the exhaust fan speed can be controlled to be higher, and when the electric power is smaller, the exhaust fan speed can be controlled to be lower. Thus, when the electric power is larger, the exhaust fan speed can be operated at a higher speed. The negative pressure generated by the exhaust fan exhausts the natural wind with a higher temperature from the exhaust fan exhaust port, which can effectively reduce the heating of the IGBT.

[0074] According to an embodiment of the present invention, when the PFC circuit operates at the first target frequency, the speed of the exhaust fan is controlled according to the power range of the electric power, including: if the electric power is greater than the first preset power, the speed of the exhaust fan is controlled to increase to the first preset speed; if the electric power is less than or equal to the first preset power, the speed of the exhaust fan is controlled to remain unchanged. The first preset power can be determined according to actual conditions, and the first preset speed can be determined according to actual conditions.

[0075] Specifically, the PFC circuit controls the speed of the exhaust fan differently at different target frequencies according to the power range in which the electric power is located. When the PFC circuit operates at a first target frequency, for example, the first target frequency may be 45Khz, and the current electric power is compared with the first preset power. If the electric power is greater than the first preset power, the speed of the exhaust fan may be controlled to increase to the first preset speed. For example, the acquired electric power is 2100W and the first preset power is 2000W, and the speed of the exhaust fan may be controlled to increase to the first preset speed, such as 1000 rpm.

[0076] The current electric power is compared with the first preset power. If the electric power is less than or equal to the first preset power, the speed of the exhaust fan can be controlled to remain unchanged. For example, the acquired electric power is 1800W, the first preset power is 2000W, and the current electric power is relatively low. The speed of the exhaust fan can be controlled to remain unchanged, for example, it can continue to be maintained at 800 rpm.

[0077] According to one embodiment of the present invention, when the PFC circuit operates at the second target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than or equal to the first preset power and less than the second preset power, the speed of the exhaust fan is controlled to increase to the second preset speed; if the electric power is less than the first preset power, the speed of the exhaust fan is controlled to remain unchanged; if the electric power is greater than or equal to the second preset power, the speed of the exhaust fan is controlled to increase to the third preset speed, wherein the third preset speed is greater than the second preset speed. The second preset power can be determined according to actual conditions, and the second preset speed and the third preset speed can be determined according to actual conditions.

[0078] Specifically, the PFC circuit controls the speed of the exhaust fan differently according to the power range of the electric power at different target frequencies. When the PFC circuit operates at the second target frequency, for example, the second target frequency can be 55Khz, and the current electric power is compared with the first preset power and the second preset power. If the electric power is greater than or equal to the first preset power and less than the second preset power, the speed of the exhaust fan can be controlled to increase to the second preset speed. For example, the obtained electric power is 2100W, the first preset power is 2000W, and the second preset power is 2200W. The speed of the exhaust fan can be controlled to increase to the second preset speed, such as to 1000 rpm. It should be noted that the second preset speed can be the same as the first preset speed or different.

[0079] If the electric power is less than the first preset power, the speed of the exhaust fan can be controlled to remain unchanged. For example, if the electric power is 1900W and the first preset power is 2000W, the speed of the exhaust fan can be controlled to remain unchanged, such as continuing to run at 800 rpm.

[0080] If the electric power is greater than or equal to the second preset power, the speed of the exhaust fan can be controlled to increase to a third preset speed. For example, if the electric power is 2300W and the second preset power is 2200W, the speed of the exhaust fan can be controlled to increase to the third preset speed, such as increasing to 1200 rpm.

[0081] According to one embodiment of the present invention, when the PFC circuit operates at a third target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than or equal to the second preset power and less than the third preset power, the speed of the exhaust fan is controlled to increase to the third preset speed; if the electric power is less than the second preset power, the speed of the exhaust fan is controlled to remain unchanged; if the electric power is greater than or equal to the third preset power, the speed of the exhaust fan is controlled to increase to a fourth preset speed, wherein the fourth preset speed is greater than the third preset speed.

[0082] Specifically, the PFC circuit controls the speed of the exhaust fan differently according to the power range of the electric power at different target frequencies. When the PFC circuit operates at the third target frequency, for example, the third target frequency may be 60Khz, and the current electric power is compared with the second preset power and the third preset power. If the electric power is greater than or equal to the second preset power and less than the third preset power, the speed of the exhaust fan may be controlled to increase to the third preset speed. For example, the acquired electric power is 2400W, the second preset power is 2200W, and the third preset power is 2500W. The speed of the exhaust fan may be controlled to increase to the third preset speed, such as increasing to 1200 rpm for operation.

[0083] If the electric power is less than the second preset power, the speed of the exhaust fan can be controlled to remain unchanged. For example, the acquired electric power is 2100W and the second preset power is 2200W. The speed of the exhaust fan can be controlled to remain unchanged, such as continuing to operate at 1000 rpm.

[0084] If the electric power is greater than or equal to the third preset power, the speed of the exhaust fan can be controlled to increase to the fourth preset speed. For example, the acquired electric power is 2600W and the third preset power is 2500W. The speed of the exhaust fan can be controlled to increase to the fourth preset speed, such as increasing to 1400 rpm.

[0085] According to one embodiment of the present invention, when the PFC circuit operates at a fourth target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: if the electric power is greater than or equal to the third preset power, the speed of the exhaust fan is controlled to increase to a fourth preset speed; if the electric power is less than the third preset power, the speed of the exhaust fan is controlled to remain unchanged.

[0086] Specifically, the PFC circuit controls the speed of the exhaust fan differently according to the power range of the electric power at different target frequencies. When the PFC circuit operates at the fourth target frequency, for example, the fourth target frequency may be 65Khz, and the current electric power is compared with the third preset power. If the electric power is greater than or equal to the third preset power, the speed of the exhaust fan may be controlled to increase to the fourth preset speed. For example, the acquired electric power is 2800W and the third preset power is 2500W. The speed of the exhaust fan may be controlled to increase to the fourth preset speed, such as increasing to 1400 rpm.

[0087] The current electric power is compared with the third preset power. If the electric power is less than the third preset power, the speed of the exhaust fan can be controlled to remain unchanged. For example, if the electric power is 2400W and the third preset power is 2500W, the speed of the exhaust fan can be controlled to remain unchanged, such as continuing to run at 1200 rpm.

[0088] Combine the following Figure 6 A control method according to an embodiment of the present invention will be described.

[0089] As a specific example, the thermal management control method of the electric control component in the air conditioner may include the following steps:

[0090] S101, obtaining the ambient temperature of the capacitive device and obtaining the electric power of the air conditioner.

[0091] S102, determining the temperature range of the ambient temperature.

[0092] S103, adjusting the carrier frequency of the PFC circuit to a corresponding target frequency according to the temperature range of the ambient temperature.

[0093] S104, determining whether the PFC circuit is operating at the first target frequency. If yes, executing step S105; if no, executing step S108.

[0094] S105, determining whether the electric power is greater than a first preset power. If yes, executing step S106; if no, executing step S107.

[0095] S106, controlling the speed of the exhaust fan to increase to a first preset speed.

[0096] S107, controlling the speed of the exhaust fan to remain unchanged.

[0097] S108, determining whether the PFC circuit operates at the second target frequency. If yes, executing step S109; if no, executing step S115.

[0098] S109, determining whether the electric power is less than a first preset power. If yes, executing step S110; if no, executing step S111.

[0099] S110, controlling the speed of the exhaust fan to remain unchanged.

[0100] S111, determine whether the electric power is greater than or equal to a first preset power and less than a second preset power. If yes, execute step S112; if not, execute step S113.

[0101] S112, controlling the exhaust fan speed to increase to a second preset speed.

[0102] S113, determine whether the electric power is greater than or equal to the second preset power. If yes, execute step S114; if not, execute step S101.

[0103] S114, controlling the exhaust fan to increase its speed to a third preset speed.

[0104] S115, determining whether the PFC circuit operates at the third target frequency. If yes, executing step S116; if no, executing step S121.

[0105] S116, determine whether the electric power is less than the second preset power. If yes, execute step S117; if not, execute step S118.

[0106] S117, controls the speed of the exhaust fan to remain unchanged.

[0107] S118, determining whether the electric power is greater than or equal to the second preset power and less than the third preset power. If yes, execute step S114; if not, execute step S119.

[0108] S119, determine whether the electric power is greater than or equal to the third preset power. If yes, execute step S120; if not, execute step S101.

[0109] S120, controlling the exhaust fan to increase its rotation speed to a fourth preset rotation speed.

[0110] S121, determining whether the PFC circuit operates at the fourth target frequency. If yes, executing step S122; if no, executing step S101.

[0111] S122, determine whether the electric power is less than a third preset power. If yes, execute step S123; if no, execute step S124.

[0112] S123, controlling the speed of the exhaust fan to remain unchanged.

[0113] S124, controlling the exhaust fan speed to increase to a fourth preset speed.

[0114] In summary, according to the thermal management control method of the electric control components in the air conditioner according to the embodiment of the present invention, the ambient temperature of the capacitive device and the electric power of the air conditioner are first obtained, and then the carrier frequency of the PFC circuit is controlled according to the ambient temperature, and the speed of the exhaust fan is controlled according to the ambient temperature and the electric power. Therefore, the method can improve the service life of the capacitive and inductive devices and solve the heat dissipation problem inside the electric control box without reducing the power of the air conditioner.

[0115] Corresponding to the above embodiment, the present invention also proposes a computer-readable storage medium.

[0116] The computer-readable storage medium of the embodiment of the present invention stores a thermal management control program for an electric control component in an air conditioner, and the thermal management control program implements the above-mentioned thermal management control method for an electric control component in an air conditioner when executed by a processor.

[0117] According to the computer-readable storage medium of an embodiment of the present invention, by executing the above-mentioned thermal management control method of the electronic control components in the air conditioner, the service life of the capacitive and inductive components can be improved, and the heat dissipation problem inside the electronic control box can be solved without reducing the power of the air conditioner.

[0118] Corresponding to the above embodiment, the present invention also proposes an electric control component.

[0119] like Figure 7 As shown, the electric control component 100 of the embodiment of the present invention may include: a memory 101, a processor 102, and a thermal management control program for the electric control component in the air conditioner stored in the memory 101 and executable on the processor 102. When the processor 102 executes the thermal management control program, the above-mentioned thermal management control method for the electric control component in the air conditioner is implemented.

[0120] The electronic control components according to the embodiments of the present invention can improve the service life of capacitive and inductive components by executing the above-mentioned thermal management control method of electronic control components in an air conditioner, and solve the heat dissipation problem inside the electronic control box without reducing the power of the air conditioner.

[0121] Corresponding to the above embodiment, the present invention also proposes an air conditioner.

[0122] Combination Figures 2 to 4As shown, the air conditioner 1000 of the embodiment of the present invention may include: a housing 200, a compressor 300, a first heat exchanger 400, a second heat exchanger 500, an air supply fan 600, and an exhaust fan 700. The housing 200 has an air supply duct 210 and an exhaust duct 220 that are isolated from each other. The first heat exchanger 400 is arranged in the air supply duct 210, and the second heat exchanger 500 is arranged in the exhaust duct 220. The first heat exchanger 400 and the second heat exchanger 500 are both connected to the compressor 300 and serve as an evaporator and a condenser, respectively. The inlet of the air supply fan 600 is connected to the air supply duct 210 and the outlet of the air supply fan 600 is connected to the indoor side, the inlet of the exhaust fan 700 is connected to the exhaust duct 220 and the outlet of the exhaust fan 700 is connected to the outdoor side; the electric control component 100 is arranged on the air inlet path of the exhaust fan 700, and the electric control component 100 includes an electric control box 1, a circuit board 2, a heating device 3 and an air duct cover 4. The electric control box 1 adopts a closed design, the circuit board 2 is accommodated in the electric control box 1, the heating device 3 includes a PFC circuit arranged on the circuit board 2, the capacitive device 32 and the inductive device 21 in the PFC circuit are accommodated in the electric control box 1, the circuit board 2 is configured to obtain the ambient temperature of the capacitive device 32, and obtain the electric power of the air conditioner 1000, and control the carrier frequency of the PFC circuit according to the ambient temperature, and control the rotation speed of the exhaust fan 700 according to the ambient temperature and the electric power.

[0123] According to one embodiment of the present invention, Figure 4 As shown, the capacitive device 32 includes a first capacitive device 320, the end of the first capacitive device 320 away from the circuit board 2 is the distal end of the first capacitive device 320, and the distance between the distal end of the first capacitive device 320 and the electric control box 1 is 5mm-10mm.

[0124] Specifically, under normal circumstances, the distal end of the first capacitive device 320 is the position closest to the electric control box 1. When the distance between the distal end of the first capacitive device 320 and the electric control box 1 is too large, the heat radiation heat dissipation efficiency of the first capacitive device 320 to the electric control box 1 is low, and the heat dissipation capacity of the first capacitive device 320 is insufficient; and when the distance between the distal end of the first capacitive device 320 and the electric control box 1 is too small, the electrical safety distance is not met. The distance between the distal end of the first capacitive device 320 and the electric control box 1 can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. By setting the distance between the distal end of the first capacitive device 320 and the electric control box 1 to the above-mentioned distance value, the distance between the distal end of the first capacitive device 320 and the electric control box 1 is made smaller, which is beneficial to the heat radiation heat dissipation of the first capacitive device 320 to the electric control box 1, thereby improving the heat dissipation effect of the first capacitive device 320; and by setting the distance between the distal end of the first capacitive device 320 and the electric control box 1 to the above-mentioned distance value, the requirement of electrical safety distance can also be met.

[0125] There may be one capacitive device 32, or there may be multiple capacitive devices 32, at least one of which is a first capacitive device 320. The first capacitive device 320 satisfies that the distance between the distal end of the first capacitive device 320 and the electric control box 1 is the above-mentioned distance value, and the distance between other capacitive devices 32 and the electric control box 1 may meet the above-mentioned distance value, or the distance between other capacitive devices 32 and the electric control box 1 may not be the above-mentioned distance value. For example, in some examples, the first capacitive device 320 is a high-voltage electrolytic capacitor with relatively large heat generation, and the first capacitive device 320 generates high heat, while the other capacitive devices 32 generate relatively small heat. By setting the distance between the distal end of the first capacitive device 320 and the electric control box 1 to the above-mentioned distance value, the distance between the first capacitive device 320 and the electric control box 1 is small, which is conducive to the heat radiation heat dissipation of the first capacitive device 320 to the electric control box 1. The capacitive device 32 with relatively small heat generation may be this distance or may not be this distance.

[0126] According to one embodiment of the present invention, Figure 4 and Figure 5 As shown, the capacitive device 32 includes a first capacitive device 320, and the end of the first capacitive device 320 away from the circuit board 2 is the distal end of the first capacitive device 320. The electric control box 1 includes an inner shell 11 and an outer shell 12 covering the inner shell 11. The inner shell 11 is an insulating shell and is formed with a second opening 112. The second opening 112 is opposite to the distal end of the first capacitive device 320. The outer shell 12 is a metal shell and blocks and closes the second opening 112.

[0127] Therefore, in this embodiment, the electric control box 1 is set to at least a double-layer structure, and the metal shell is set to ensure the structural reliability and fire resistance of the electric control box 1. The insulating shell is set to play the role of insulation, etc., to improve the safety of the electric control component 100. Optionally, the inner shell 11 can be a plastic part, which not only has an insulating effect but also has a flame retardant effect, which is conducive to improving the flame retardant and fire resistance of the electric control box 1. By setting the electric control box 1 to a double-layer structure, and the inner shell 11 is a plastic shell, and the outer shell 12 is a metal shell, the manufacturing cost of the inner shell 11 is low, and on the basis of improving the working reliability of the electric control box 1, the manufacturing cost of the electric control box 1 can also be reduced.

[0128] Normally, the distal end of the first capacitive device 320 is the position of the first capacitive device 320 closest to the electric control box 1, and it can be understood that the outer shell 12 of the present invention is a metal shell with strong thermal conductivity, the inner shell 11 is an insulating shell with relatively weak thermal conductivity relative to the outer shell 12, and the outer shell 12 is located outside the inner shell 11, and the outer shell 12 can directly contact the external space. Therefore, by providing the second opening 112 at the position where the inner shell 11 is opposite to the distal end of the first capacitive device 320, the first capacitive device 320 directly radiates heat to the outer shell 12 through the second opening 112, which is beneficial to the heat radiation heat dissipation of the first capacitive device 320 to the electric control box 1, and improves the heat radiation heat dissipation efficiency of the first capacitive device 320.

[0129] The capacitive device 32 may be one or more capacitive devices 32, at least one of which is a first capacitive device 320, and a second opening 112 is provided at the inner shell 11 opposite to the distal end of the first capacitive device 320, and openings may or may not be provided at the inner shell 11 opposite to the other capacitive devices 32. For example, in some examples, the first capacitive device 320 is a high-voltage electrolytic capacitor with relatively large heat generation, and the first capacitive device 320 generates relatively high heat, while the other capacitive devices 32 generate relatively low heat. By providing the second opening 112 at the inner shell 11 opposite to the distal end of the first capacitive device 320, the heat radiation heat dissipation efficiency of the first capacitive device 320 and the metal shell is high, which is conducive to the heat radiation heat dissipation of the first capacitive device 320 to the electric control box 1.

[0130] When there are multiple first capacitive devices 320, optionally, at least two first capacitive devices 320 correspond to the same second opening 112, that is, the second opening 112 has a larger range and can be opposite to the far ends of at least two first capacitive devices 320; or, also optionally, each first capacitive device 320 corresponds to a different second opening 112, and the first capacitive devices 320 correspond to the second openings 112 one by one.

[0131] In some embodiments of the present invention, Figure 4 and Figure 5As shown, the inductive device 31 includes a first inductive device 310, and the end of the first inductive device 310 away from the circuit board 2 is the distal end of the first inductive device 310. The inner shell 11 is also formed with a first opening 111, and the first opening 111 is opposite to the distal end of the first inductive device 310. The outer shell 12 also blocks and closes the first opening 111. The heat radiation heat dissipation efficiency of the first inductive device 310 can be improved by setting the first opening 111. Optionally, the first opening 111 and the second opening 112 on the inner shell 11 can be spaced apart, the first inductive device 310 independently corresponds to the first opening 111, and the first capacitive device 320 independently corresponds to the second opening 112; or, further optionally, the first opening 111 and the second opening 112 on the inner shell 11 are connected to each other, and the distal ends of the first inductive device 310 and the distal ends of the first capacitive device 320 are opposite to the first opening 111 and the second opening 112.

[0132] According to one embodiment of the present invention, Figure 4 As shown, the capacitive device 32 includes a first capacitive device 320, and the inductive device 31 includes a first inductive device 310. The first inductive device 310 and the first capacitive device 320 are located on the same side of the circuit board 2 in the thickness direction, and the height H1 of the first inductive device 310 in the thickness direction of the circuit board 2 is higher than the height H2 of the first capacitive device 320. The electric control box 1 includes a first box wall 1a, and the first box wall 1a is located on a side of the first inductive device 310 away from the circuit board 2. The distance H3 between the first part of the first box wall 1a corresponding to the first inductive device 310 and the circuit board 2 is greater than the distance H4 between the second part of the first box wall 1a corresponding to the first capacitive device 320 and the circuit board 2.

[0133] Specifically, the height of the first inductive device 310 is relatively high, and the distance between the first part and the circuit board 2 is relatively large, while the height of the first capacitive device 320 is relatively low, and the distance between the first part and the circuit board 2 is relatively small. In this way, under the condition that the first inductive device 310 and the first capacitive device 320 are installed, the distance between the side of the two away from the circuit board 2 and the electric control box 1 is small, which is conducive to the heat radiation and heat dissipation of the two. If the first box wall 1a is set as a plane structure, the distance between the first box wall 1a and the first inductive device 310 is small, and the distance between the first box wall 1a and the first capacitive device 320 is large, which is not conducive to the heat radiation and heat dissipation of the first capacitive device 320 to the electric control box 1, and the heat emitted by the first inductive device 310 can also be easily conducted to the first capacitive device 320 and the electric control box 1, further hindering the heat dissipation of the first capacitive device 320.

[0134] In some embodiments of the present invention, Figure 4 and Figure 5As shown, the inductive device 31 includes a first inductive device 310, and the electric control box 1 includes a first box wall 1a, the first box wall 1a is located on the side of the first inductive device 310 away from the circuit board 2, a part of the first box wall 1a protrudes in the direction away from the circuit board 2 to form a protrusion b, and an avoidance cavity is formed on the inner side of the protrusion b, that is, an avoidance cavity is formed on the side toward the inside of the electric control box 1, and at least a part of the first inductive device 310 is accommodated in the avoidance cavity.

[0135] By providing the protrusion b to form an avoidance cavity to accommodate the inductive device 31, the first aspect can increase the heat radiation area of ​​the first inductive device 310 and improve the heat dissipation efficiency. It can be understood that the first inductive device 310 is at least partially accommodated in the avoidance cavity. In addition to heat radiation with the side wall of the electric control box 1 away from the circuit board 2, the first inductive device 310 also radiates heat with the wall located on the side of the first inductive device 310. Compared with heat radiation only with the side wall away from the circuit board 2, the first box wall 1a of the electric control box 1 of the embodiment of the present invention can increase the heat radiation area of ​​the first inductive device 310 by providing the protrusion b, which is beneficial to the heat radiation heat dissipation of the first inductive device 310 to the electric control box 1, and improves the heat radiation heat dissipation efficiency of the first inductive device 310.

[0136] The protrusion b is provided to form an avoidance cavity to accommodate the inductive device 31 . On the second aspect, the protrusion b can cover the heat dissipation of the first inductive device 310 , thereby reducing the adverse thermal impact of the heat flowing to other locations on other components on the circuit board 2 .

[0137] The avoidance cavity is formed by setting the protruding portion b to accommodate the inductive device 31. In the third aspect, the avoidance cavity avoids the first inductive device 310, improves the interference between the first inductive device 310 and the electric control box 1, and improves the working stability of the first inductive device 310. In addition, only a part of the electric control box 1 needs to be protruded in the direction away from the circuit board 2, and the electric control box 1 does not need to be raised as a whole to be away from the circuit board 2. The non-protruding part can save materials and reduce manufacturing costs. In addition, the non-protruding part of the electric control box 1 is closer to other components on the circuit board 2, which is conducive to the heat radiation and heat dissipation of other components.

[0138] In some examples, the first inductive device 310 may be connected to a strong current, such as a PFC inductor or a common mode inductor, etc. The first inductive device 310 generates high heat and has a high height, while other inductive devices 31 are relatively low in height and generate relatively low heat. Therefore, a protrusion b is provided at the first box wall 1a opposite to the first inductive device 310. The protrusion b forms an avoidance cavity to avoid the first inductive device 310, which is conducive to the heat radiation heat dissipation of the first inductive device 310 to the electric control box 1, and can also cover the heat dissipation of the first inductive device 310 to avoid adverse thermal effects on other inductive devices 31, improve the interference between the first inductive device 310 and the electric control box 1, and improve the working stability of the first inductive device 310. The other inductive devices 31 with relatively low heights are arranged corresponding to the non-protruding parts of the electric control box 1, which not only saves materials, but also facilitates the heat radiation heat dissipation of the inductive devices 31 with low heights.

[0139] According to one embodiment of the present invention, the refrigerant in the compressor 300 includes carbon dioxide. Carbon dioxide has a small flow loss, good heat transfer effect, and is safe and non-toxic. However, the critical temperature of carbon dioxide is low and the refrigeration efficiency is low. Therefore, the operating pressure of the air conditioner 1000 is large, and the requirements of the electronic control component 100 for heat dissipation are higher. The air conditioner 1000 is provided with the electronic control component 100 of the above embodiment, which can improve the heat dissipation efficiency of the electronic control component 100 and improve the working stability of the air conditioner 1000.

[0140] It should be noted that for details not disclosed in the air conditioner of the embodiment of the present invention, please refer to the details disclosed in the thermal management control method of the electric control component in the air conditioner of the embodiment of the present invention, and the details will not be repeated here.

[0141] In the air conditioner according to the embodiment of the present invention, the circuit board is configured to obtain the ambient temperature of the capacitive device and the electric power of the air conditioner, and to control the carrier frequency of the PFC circuit according to the ambient temperature, and to control the rotation speed of the exhaust fan according to the ambient temperature and the electric power, thereby increasing the service life of the capacitive and inductive devices and solving the heat dissipation problem inside the electric control box without reducing the power of the air conditioner.

[0142] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0143] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0144] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0145] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0146] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0147] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A thermal management control method for an electric control component in an air conditioner, characterized in that: The air conditioner further comprises a housing, a compressor, a first heat exchanger, a second heat exchanger, an air supply fan and an exhaust fan. The housing has an air supply duct and an exhaust duct isolated from each other. The first heat exchanger is arranged in the air supply duct, and the second heat exchanger is arranged in the exhaust duct. The first heat exchanger and the second heat exchanger are both connected to the compressor and serve as a condenser and an evaporator respectively. The inlet of the air supply fan is communicated with the air supply duct and the outlet of the air supply fan is communicated to the indoor side. The inlet of the exhaust fan is communicated with the exhaust duct and the outlet of the exhaust fan is communicated to the outdoor side. The electric control component is arranged on the air inlet path of the exhaust fan. The electric control component comprises an electric control box, a circuit board, a heating device and an air duct cover. The electric control box adopts a closed design. The circuit board is accommodated in the electric control box. The heating device comprises a PFC circuit arranged on the circuit board. The capacitive device and the inductive device in the PFC circuit are accommodated in the electric control box. The method comprises: Acquiring the ambient temperature of the capacitive device and acquiring the electric power of the air conditioner; The carrier frequency of the PFC circuit is controlled according to the ambient temperature, and the rotation speed of the exhaust fan is controlled according to the ambient temperature and the electric power.

2. The method according to claim 1, characterized in that There is a positive correlation between the carrier frequency of the PFC circuit and the rotation speed of the exhaust fan.

3. The method according to claim 1 or 2, characterized in that: Controlling the carrier frequency of the PFC circuit according to the ambient temperature includes: Determining the temperature interval in which the ambient temperature lies; The carrier frequency of the PFC circuit is adjusted to a corresponding target frequency according to the temperature range of the ambient temperature.

4. The method according to claim 3, characterized in that The speed of the exhaust fan is controlled according to the ambient temperature and the electric power, comprising: When the carrier frequency of the PFC circuit is adjusted to the corresponding target frequency, the power range of the electric power is determined, and the rotation speed of the exhaust fan is controlled according to the power range of the electric power.

5. The method according to claim 4, characterized in that When the PFC circuit operates at the first target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: If the electric power is greater than the first preset power, the speed of the exhaust fan is controlled to increase to the first preset speed; If the electric power is less than or equal to the first preset power, the rotation speed of the exhaust fan is controlled to remain unchanged.

6. The method according to claim 4, characterized in that When the PFC circuit operates at the second target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: If the electric power is greater than or equal to the first preset power and less than the second preset power, the speed of the exhaust fan is controlled to increase to the second preset speed; If the electric power is less than the first preset power, controlling the speed of the exhaust fan to remain unchanged; If the electric power is greater than or equal to the second preset power, the speed of the exhaust fan is controlled to increase to a third preset speed, wherein the third preset speed is greater than the second preset speed.

7. The method according to claim 4, characterized in that When the PFC circuit operates at the third target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: If the electric power is greater than or equal to the second preset power and less than the third preset power, controlling the speed of the exhaust fan to increase to the third preset speed; If the electric power is less than the second preset power, controlling the speed of the exhaust fan to remain unchanged; If the electric power is greater than or equal to the third preset power, the speed of the exhaust fan is controlled to increase to a fourth preset speed, wherein the fourth preset speed is greater than the third preset speed.

8. The method according to claim 4, characterized in that When the PFC circuit operates at the fourth target frequency, the speed of the exhaust fan is controlled according to the power range in which the electric power is located, including: If the electric power is greater than or equal to the third preset power, controlling the speed of the exhaust fan to increase to a fourth preset speed; If the electric power is less than the third preset power, the rotation speed of the exhaust fan is controlled to remain unchanged.

9. A computer-readable storage medium, characterized in that: A thermal management control program for an electric control component in an air conditioner is stored thereon, and when the thermal management control program is executed by a processor, a thermal management control method for an electric control component in an air conditioner according to any one of claims 1-8 is implemented.

10. An electric control component, characterized in that: include: A memory, a processor, and a thermal management control program for an electric control component in an air conditioner stored in the memory and executable on the processor. When the processor executes the thermal management control program, a thermal management control method for an electric control component in an air conditioner according to any one of claims 1 to 8 is implemented.

11. An air conditioner, characterized in that: include: A housing, a compressor, a first heat exchanger, a second heat exchanger, an air supply fan and an exhaust fan, wherein the housing has an air supply duct and an exhaust duct isolated from each other, the first heat exchanger is arranged in the air supply duct, the second heat exchanger is arranged in the exhaust duct, the first heat exchanger and the second heat exchanger are both connected to the compressor and serve as a condenser and an evaporator respectively, the inlet of the air supply fan is connected to the air supply duct and the outlet of the air supply fan is connected to the indoor side, the inlet of the exhaust fan is connected to the exhaust duct and the outlet of the exhaust fan is connected to the outdoor side; An electric control component is arranged on the air inlet path of the exhaust fan, and includes an electric control box, a circuit board, a heating device and an air duct cover. The electric control box adopts a closed design, and the circuit board is accommodated in the electric control box. The heating device includes a PFC circuit arranged on the circuit board, and the capacitive device and the inductive device in the PFC circuit are accommodated in the electric control box. The circuit board is configured to obtain the ambient temperature of the capacitive device and the electric power of the air conditioner, and to control the carrier frequency of the PFC circuit according to the ambient temperature, and to control the rotation speed of the exhaust fan according to the ambient temperature and the electric power.

12. The air conditioner according to claim 11, characterized in that: The capacitive device comprises a first capacitive device, an end of the first capacitive device away from the circuit board is a distal end of the first capacitive device, and a distance between the distal end of the first capacitive device and the electric control box is 5 mm-10 mm.

13. The air conditioner according to claim 11, characterized in that: The capacitive device includes a first capacitive device, an end of the first capacitive device away from the circuit board is the distal end of the first capacitive device, the electric control box includes an inner shell and an outer shell covering the inner shell, the inner shell is an insulating shell and is formed with a second opening, the second opening is opposite to the distal end of the first capacitive device, and the outer shell is a metal shell and blocks and closes the second opening.

14. The air conditioner according to claim 11, characterized in that: The capacitive device includes a first capacitive device, and the inductive device includes a first inductive device. The first inductive device and the first capacitive device are located on the same side of the circuit board in the thickness direction, and the height of the first inductive device in the thickness direction of the circuit board is higher than the height of the first capacitive device. The electric control box includes a first box wall, and the first box wall is located on a side of the first inductive device away from the circuit board. The distance between a first part of the first box wall corresponding to the first inductive device and the circuit board is greater than the distance between a second part of the first box wall corresponding to the first capacitive device and the circuit board.

15. The air conditioner according to any one of claims 11 to 14, characterized in that: The refrigerant in the compressor includes carbon dioxide.

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