Electric control device, air conditioner controller and air conditioner

Abstract

The utility model discloses an electric control device, an air conditioner controller and an air conditioner. The electric control device comprises a power switch device, a power supply device and a controller, the driving unit is used for transmitting a driving signal and comprises a first driving channel and a second driving channel which are arranged in parallel, and a first change-over switch is arranged on the first driving channel and / or the second driving channel; the power supply transmission unit comprises a first transmission channel and a second transmission channel which are arranged in parallel, and a second change-over switch is arranged on the first transmission channel and / or the second transmission channel; the temperature sampling module is used for acquiring a temperature value of the power switch device; and the controller is used for controlling the conduction state of the change-over switch based on the temperature value. According to the electric control device, the temperature value of the power switch device is obtained through the temperature sampling module, the conduction state of the change-over switch is controlled based on the temperature value, then the driving resistance of the power switch device and the flow direction of reverse current in a circuit at the conduction moment are controlled, and temperature rise and heating of the power switch device can be effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of power supply circuits, and in particular to an electric control device, an air conditioning controller and an air conditioner. Background Art

[0002] In order to improve the power factor, a power factor correction (PFC) circuit needs to be installed in the power supply circuit. In some specific application scenarios, the electronic control device needs to be sealed, which brings challenges to the heat dissipation design of the electronic control device. For example, a kitchen air conditioner using carbon dioxide (CO2) as a refrigerant has a relatively high pressure when CO2 is working, and its electrical power is relatively high compared to air conditioners using traditional refrigerants. In addition, when it is used in the kitchen, the electronic control device needs to be sealed, which is not easy to dissipate heat, especially the temperature rise and heat generation of the power switch device in the PFC circuit is prominent, which affects the operating stability of the electronic control device. The PFC circuit is often used in the outdoor unit of the air conditioner to boost the voltage, improve the power factor, and improve harmonics. Therefore, solving the problem of temperature rise and heat generation of the power switch device in the high-power PFC circuit has become a necessary measure to ensure the normal operation of the electronic control device. Utility Model Content

[0003] In view of this, the embodiments of the present application provide an electric control device, an air-conditioning controller and an air-conditioner, which can effectively control the temperature rise and heat generation of the power switching device.

[0004] The technical solution of the embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides an electric control device, comprising:

[0006] A power switch device, wherein a first end of the power switch device is connected to a power supply end, and a second end of the power switch device is grounded;

[0007] a driving unit connected to the driving end of the power switch device and used for transmitting a driving signal; the driving unit comprises a first driving channel and a second driving channel connected to the driving end of the power switch device, and a first switching switch is provided on the first driving channel and / or the second driving channel;

[0008] A power transmission unit is arranged between the first end of the power switch device and the power output end, the power transmission unit comprises a first transmission channel and a second transmission channel arranged in parallel, and a second switching switch is arranged on the first transmission channel and / or the second transmission channel;

[0009] A temperature sampling module, the temperature sampling module is used to obtain the temperature value of the power switch device;

[0010] A controller is connected to the temperature sampling module, the first switch, and the second switch, respectively, and is used to control the conduction state of the first switch and / or the second switch based on the temperature value of the power switch device.

[0011] In some embodiments, the electronic control device further comprises:

[0012] A rectifier module, the output end of which is connected to the power supply end, is used to rectify the initial power supply and output it through the power supply end.

[0013] In some embodiments, the electronic control device further comprises:

[0014] A PFC inductor, wherein a first end of the PFC inductor is connected to the output end of the rectifier module, and a second end of the PFC inductor is connected to the power supply end, for energy storage.

[0015] In some embodiments, the first transmission channel comprises:

[0016] A freewheeling diode, wherein the anode of the freewheeling diode is connected to the first end of the power switch device, and the cathode of the freewheeling diode is connected to the power supply output end, for providing a current transmission path.

[0017] In some embodiments, the first switch includes:

[0018] A first switch tube provided on the first driving channel or the second driving channel, used to control the on-off state of the first driving channel or the second driving channel;

[0019] The first driving channel has a first resistance state of forward conduction and a second resistance state of reverse conduction, and the second driving channel has a third resistance state of forward conduction and a fourth resistance state of reverse conduction.

[0020] In some embodiments, the second transmission channel is provided with a second switch, a first end of the second switch is connected to a first end of the power switch device, and the second transmission channel includes:

[0021] A filtering module, wherein a first end of the filtering module is connected to a second end of the second switch, and a second end of the filtering module is connected to the power output end, for filtering high-frequency noise.

[0022] In some embodiments, the second switch includes:

[0023] A second switch tube, wherein a first end of the second switch tube is connected to a first end of the filter module;

[0024] a first diode, wherein an anode of the first diode is connected to the second end of the second switch tube, and a cathode of the first diode is connected to the first end of the power switch device;

[0025] A second diode, wherein an anode of the second diode is connected to the first end of the power switch device, and a cathode of the second diode is connected to the first end of the second switch tube.

[0026] In some embodiments, the second switch includes:

[0027] A relay, wherein a first end of the relay is connected to a first end of the power switch device, and a second end of the relay is connected to a first end of the filter module;

[0028] A third diode, wherein an anode of the third diode is connected to the first end of the power switch device, and a cathode of the third diode is connected to the first end of the filter module.

[0029] In a second aspect, an embodiment of the present application provides an air-conditioning controller, comprising a drive controller and the electronic control device described in the first aspect of the embodiment of the present application, wherein the output end of the drive controller is connected to the input end of the drive unit of the electronic control device.

[0030] In a third aspect, an embodiment of the present application provides an air conditioner, comprising the air conditioner controller described in the second aspect of the embodiment of the present application.

[0031] An electric control device provided in an embodiment of the present application includes: a power switch device, a drive unit, a power transmission unit, a temperature sampling module and a controller, wherein the first end of the power switch device is connected to the power supply end of the power switch device, and the second end of the power switch device is grounded; the drive unit is connected to the drive end of the power switch device, and is used to transmit a drive signal, including a first drive channel and a second drive channel connected to the drive end of the power switch device, and a first switching switch is arranged on the first drive channel and / or the second drive channel; the power transmission unit is arranged between the first end of the power switch and the power output end, including a first transmission channel and a second transmission channel arranged in parallel, and a second switching switch is arranged on the first transmission channel and / or the second transmission channel; the temperature sampling module is used to obtain the temperature value of the power switch device; the controller is respectively connected to the temperature sampling module, the first switching switch, and the second switching switch, and is used to control the conduction state of the first switching switch and / or the second switching switch based on the temperature value of the power switch device. The electronic control device obtains the temperature value of the power switching device through the temperature sampling module, and controls the conduction state of the first switching switch and / or the second switching switch based on the temperature value, thereby controlling the driving resistance of the power switching device and the direction of the reverse current in the circuit at the moment of conduction, which can reduce the loss of the power switching device during operation and effectively reduce the temperature rise and heat generation of the power switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a module of an electronic control device provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the circuit structure of an electric control device in an application example of the present application;

[0034] Figure 3 It is another circuit structure schematic diagram of an electric control device in an application example of the present application;

[0035] Figure 4 This is a schematic diagram of the control flow of an electric control device for all temperature ranges in an application example of the present application. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] In the related technology, the driving end of the power switching device in the PFC circuit is often only connected to one driving channel, resulting in a large driving resistance of the power switching device. At the moment when the power switching device is turned on, a large reverse current will flow through the power switching device, resulting in large losses in the power switching device during operation, which in turn aggravates the temperature rise problem.

[0039] Based on this, the embodiment of the present application provides an electric control device, such as Figure 1 and Figure 2As shown, the electric control device 100 includes: a power switch device 110, a drive unit 120, a power transmission unit 130, a temperature sampling module 140 and a controller (not shown in the figure). The first end a of the power switch device 110 is connected to the power supply end, and the second end 2 of the power switch device 110 is grounded. The drive unit 120 is connected to the drive end g of the power switch device 110 for transmitting a drive signal; the drive unit 120 includes a first drive channel 121 and a second drive channel 122, and a first switching switch 123 is provided on the first drive channel 121 and / or the second drive channel 122. The power transmission unit 130 is arranged between the first end a of the power switch device 110 and the power output end b, and includes a first transmission channel 131 and a second transmission channel 132, and a second switching switch 133 is provided on the first transmission channel 131 and / or the second transmission channel 132. The temperature sampling module 140 is used to obtain the temperature value of the power switching device 110; the controller is connected to the temperature sampling module 140, the first switching switch 123, and the second switching switch 133 respectively, and is used to control the conduction state of the first switching switch 123 and / or the second switching switch 133 based on the temperature value of the power switching device 110.

[0040] It can be understood that the power switching device 110 can quickly switch between the on and off states to achieve precise control of the current in the circuit, including but not limited to: insulated gate bipolar transistors (IGBTs), bipolar junction transistors (BJTs) and field effect transistors (FETs). In practical applications, insulated gate bipolar transistors (IGBTs) with high-speed switching capabilities are often used as circuit switching devices.

[0041] In practical applications, the temperature sampling module 140 includes but is not limited to: a built-in temperature sensor, an externally mounted temperature sensor, and a digital temperature sensor.

[0042] In some embodiments, the electronic control device 100 further includes:

[0043] The rectifier module 160 has an output terminal d connected to the power supply terminal a, and is used to rectify the initial power supply and output it through the power supply terminal a.

[0044] It can be understood that the rectifier module 160 converts AC power into stable DC power output through the unidirectional conductivity of semiconductor elements including diodes.

[0045] In some embodiments, the electronic control device 100 further includes:

[0046] The PFC inductor 170 has a first end connected to the output end d of the rectifier module 160 and a second end connected to the power supply end a for energy storage.

[0047] It is understandable that when the power switch device 110 is turned on, the DC current output by the rectifier module 160 flows through the PFC inductor 170, and the PFC inductor 170 converts electrical energy into magnetic energy to store energy.

[0048] In some embodiments, the electronic control device 100 further includes:

[0049] The electrolytic capacitor 180 has a first end connected to the second end c of the power switch device 110 and a second end connected to the power output end b for energy storage.

[0050] In practical applications, the electrolytic capacitor 180 may be a high-voltage electrolytic capacitor, which is used to cooperate with the PFC inductor 170 to improve the power factor and provide a stable DC voltage for the subsequent circuit.

[0051] In some embodiments, the first transmission channel 131 includes:

[0052] The flyback diode D3 has an anode connected to the first terminal a of the power switch device 110 and a cathode connected to the power output terminal b, and is used to provide a current transmission path.

[0053] It can be understood that when the power switch device 110 is turned off, the current in the PFC inductor 170 cannot change suddenly, and a freewheeling path is required in the circuit to maintain the current flow. The freewheeling diode D3 in the first transmission channel 131 provides a transmission path for the current in the PFC inductor 170. At this time, the energy in the PFC inductor 170 will be released to the power output terminal b, so that the output voltage of the power output terminal b is higher than the input voltage of the power supply.

[0054] In the present application, when the power switch device 110 is turned on, the freewheeling diode D3 needs to be turned off, and when the power switch device 110 is turned off, the freewheeling diode D3 is turned on. Preferably, compared with ordinary diodes, the fast recovery diode has a shorter reverse recovery time, and when switching from the on state to the off state, it can eliminate the residual carrier charge more quickly and restore its blocking ability. This helps to reduce voltage spikes and current overlap during the switch conversion, thereby reducing electromagnetic interference (EMI).

[0055] In some embodiments, the first switch 123 includes:

[0056] A first switch tube provided on the first driving channel 121 or the second driving channel 122, used to control the on / off state of the first driving channel 121 or the second driving channel 122;

[0057] The first driving channel 121 has a first resistance state of forward conduction and a second resistance state of reverse conduction, and the second driving channel 122 has a third resistance state of forward conduction and a fourth resistance state of reverse conduction.

[0058] It can be understood that by connecting the first driving channel 121 and the second driving channel 122 at the driving end g of the power switch device 110, the power switch device 110 can be protected and the stability of the switching operation can be maintained while transmitting the driving signal.

[0059] Specifically, the first switching switch 123 can be provided on both the first driving channel 121 and the second driving channel 122. When the first switching switches 123 on the first driving channel 121 and the second driving channel 122 are closed at the same time, the first driving channel 121 and the second driving channel 122 are both used to transmit the driving signal, the driving resistance of the power switching device 110 is small, and its loss during the operation is also small. When the first switching switches 123 on the first driving channel 121 and the second driving channel 122 are closed and opened at the same time, only the first driving channel 121 or the second driving channel 122 is used to transmit the driving signal, the driving resistance is large, and its loss during the operation is also large. When the first switching switches 123 on the first driving channel 121 and the second driving channel 122 are opened at the same time, the first driving channel 121 and the second driving channel 122 are both in an open circuit state, and the power switching device 110 does not work.

[0060] In some embodiments, the second transmission channel 132 is provided with a second switch 133, a first end of the second switch 133 is connected to a first end of the power switch device 110, and the second transmission channel 132 includes:

[0061] A filtering module, wherein a first end of the filtering module is connected to a second end of the second switch 133 , and a second end of the filtering module is connected to a power output end, for filtering high frequency noise.

[0062] In practical applications, the filtering module may include a resistor R9 and a capacitor C1 connected in series, the first end of the capacitor C1 is connected to the power output end, the second end of the capacitor C1 is connected to the first end of the resistor R9, and the second end of the resistor R9 is connected to the second end of the second switching switch 133, which can be used to filter out high-frequency noise, protect circuits and improve electromagnetic compatibility (EMC).

[0063] In some embodiments, the second switch 133 includes:

[0064] A second switch tube, wherein a first end of the second switch tube is connected to a first end of the filter module;

[0065] A first diode, wherein an anode of the first diode is connected to the second end of the second switch tube, and a cathode of the first diode is connected to the first end of the power switch device 110;

[0066] A second diode, wherein an anode of the second diode is connected to a first end of the power switch device 110 , and a cathode of the second diode is connected to a first end of the second switch tube.

[0067] It is understandable that when the second switch 133 is closed, when the power switch device 110 is turned on, the freewheeling diode D3 is turned off at the moment, due to the recovery time of the freewheeling diode D3, a pulse current will be generated through the filter module and the second switch 133 to flow into the power switch device 110, aggravating the loss when the power switch device 110 is turned on. When the second switch 133 is turned off, the pulse current generated by the freewheeling diode 1311 cannot reach the power switch device 110, thereby reducing the loss of the power switch device 110.

[0068] In some embodiments, the second switch 133 includes:

[0069] A relay, wherein a first end of the relay is connected to a first end of the power switch device 110, and a second end of the relay is connected to a first end of the filter module;

[0070] A third diode, wherein an anode of the third diode is connected to the first end of the power switch device 110 , and a cathode of the third diode is connected to the first end of the filter module.

[0071] Among them, the relay includes but is not limited to an electromagnetic relay.

[0072] The embodiment of the present application further provides an air-conditioning controller, including a drive controller 190 and an electric control device 100 .

[0073] The driving controller 190 includes but is not limited to a power switch device driving chip, and is used to output a driving signal to control the conduction state of the power switch device 110 .

[0074] The embodiment of the present application is described in detail below with reference to an application example.

[0075] This application example provides an air-conditioning controller and a temperature control method thereof, which are intended to effectively reduce the temperature rise and heat generation of enclosed electronically controlled switch devices.

[0076] This application example provides a schematic diagram of the structure of an air conditioning controller. Figure 2 As shown, the main components include: a power switch device 110, a drive unit, a power transmission unit, a temperature sampling module, a rectifier module 160, a PFC inductor 170, an electrolytic capacitor 180 and a drive controller 190.

[0077] Here, the driving unit includes a first driving channel 121 and a second driving channel 122 , and a second switching switch 123 is provided on the second driving channel 122 . The power transmission unit includes a first transmission channel 131 and a second transmission channel 132 , and a second switching switch 133 is provided on the second transmission channel 132 .

[0078] In this application example, the power switch device 110 is an IGBT Q1, the first switch is a MOS tube Q2, the first drive channel includes a resistor R1, a resistor R2 and a diode D4, the cathode of the diode D4 is connected to the first end of the resistor R1, the anode of the diode D4 is connected to the drive end g of the power switch device 110, the first end of the resistor R2 is connected to the anode of the diode D4, and the second end of the resistor R2 is connected to the second end of the resistor R1.

[0079] The first driving channel includes a resistor R3, a resistor R4 and a diode D5, wherein the cathode of the diode D5 is connected to the first end of the resistor R3, the anode of the diode D5 is connected to the driving end g of the power switching device 110, the first end of the resistor R4 is connected to the anode of the diode D5, and the second end of the resistor R4 is connected to the second end of the third resistor R3.

[0080] It can be understood that the first switch 123 can be controlled by the transistor Q3, wherein the driving end of the transistor Q3 can be connected to a voltage divider bias circuit composed of a resistor R5 and a resistor R6.

[0081] Exemplarily, the second switch 133 includes: a transistor Q4, a diode D1 and a diode D2, the emitter of the transistor Q4 is connected to the anode of the diode D1, the cathode of the diode D1 is connected to the first end a of the power switch device 110, the anode of the diode D2 is connected to the first end a of the power switch device 110, the cathode of the diode D2 is connected to the collector of the transistor Q4, the base of the transistor Q4 is connected to the driving voltage, and the collector of the transistor Q4 is connected to the resistor R9. The transistor Q4 is switched between on and off under the action of the driving voltage, thereby realizing the control of the reverse current on the second transmission channel 132.

[0082] The rectifier module includes a first parallel branch and a second parallel branch, the first parallel branch includes a diode D6 and a diode D7 connected in series between the ground terminal and the PFC inductor input terminal, and the connection point between the diode D6 and the diode D7 serves as a first neutral point; the second parallel branch includes a diode D8 and a diode D9 connected in series between the ground terminal and the PFC inductor input terminal, and the connection point between the diode D8 and the diode D9 serves as a second neutral point;

[0083] The cathodes of the diodes D6 and D8 are connected to the input end of the PFC inductor, the cathodes of the diodes D7 and D9 are connected to the ground end, and the first neutral point and the second neutral point are connected to the first terminal and the second terminal respectively.

[0084] It can be understood that a safety resistor R7 can be provided between the second end of the power diode and the cathodes of the diodes D7 and D9 to measure the current in the loop.

[0085] In practical applications, such as Figure 3 As shown, the first switch may be a transistor Q2, and the second driving channel may only include a resistor R8.

[0086] In actual applications, the controller divides the temperature section into three parts in advance: low temperature section (T<75℃), medium temperature section (75℃~80℃), high temperature section (T>80℃), and sets corresponding control schemes for each temperature section to control the switch state of the switching switch. When the temperature changes from a certain temperature section to another temperature section, the corresponding control is also executed. For example: when the temperature changes from 80℃ to 81℃, the system will immediately switch to the control logic of the high temperature section, closing the first switching switch 123 and disconnecting the second switching switch 133. Changes in other temperature sections are similar.

[0087] Figure 4 This is a control flow diagram of the temperature acquisition circuit for the full temperature range. Figure 2 and Figure 4 , the full temperature control scheme is described in detail.

[0088] First, the specific steps of the low temperature section control scheme are as follows:

[0089] Step 401: When the power is just turned on, the MOS tube Q2 is controlled to be disconnected and the transistor Q4 is closed. The system defaults to the low temperature segment logic and reads the temperature value T obtained by the temperature sampling module.

[0090] In this application example, the control scheme for the low temperature section is to disconnect the MOS tube Q2 and close the transistor Q4, that is, to control the first switch to be disconnected and the second switch to be turned on. When the MOS tube Q2 is disconnected, the drive signal is transmitted by the first drive channel 121, and the drive resistance is large. At this time, the turn-on loss of the IGBT Q1 is large, but the electromagnetic interference will be relatively low; the transistor Q4 is closed, and at the moment when the IGBT Q1 is turned on, the fast recovery diode is turned off. The pulse current generated by the conduction time of the fast recovery diode flows to the IGBT Q1 through the filter module, the transistor Q4 and the diode D1.

[0091] Step 402: Determine whether the temperature sampling value is within the interval T<75°C. If so, execute step 403.

[0092] Here, after power-on, the temperature sampling value T is compared with the low temperature interval T<75° C. If the temperature sampling value T is within the low temperature interval, step 403 is executed.

[0093] Step 403: Determine that the temperature is in the low temperature range, and execute step 404.

[0094] Step 404: Control the MOS tube Q2 to be disconnected and the transistor Q4 to be closed.

[0095] In practical applications, if after power-on, the detected temperature sampling value T is within the interval T<75°C, since the control logic just after power-on is the same as the low temperature control logic, no switching is required at this time.

[0096] Second, the specific steps of the control scheme for the medium temperature section are as follows:

[0097] Step 401: When the power is just turned on, the MOS tube Q2 is controlled to be disconnected, and the transistor Q4 is pulled in. The system defaults to the low temperature segment logic and reads the temperature sampling value T.

[0098] Step 405: Determine whether the temperature sampling value is within the interval 75°C ≤ T ≤ 80°C. If so, execute step 403.

[0099] Step 406: Determine that the temperature is in the medium temperature range.

[0100] Step 407: Control the MOS tube Q2 to be closed and the transistor Q4 to be closed.

[0101] Here, the MOS tube Q2 is attracted, that is, the first switching switch is turned on, and the driving signal is transmitted by the first driving channel and the second driving channel. The driving resistance is small. At this time, the turn-on loss of the IGBT is small, but the electromagnetic interference is slightly worse; the transistor Q4 is attracted, that is, the second switching switch is turned on, and at the moment when the IGBT Q1 is turned on, the fast recovery diode is turned off. The pulse current generated by the turn-on time of the fast recovery diode flows to the IGBT Q1 through the filter module, the transistor Q4 and the diode D1.

[0102] Third, the specific steps of the high temperature section control plan are as follows:

[0103] Step 401: When the power is just turned on, the MOS tube Q2 is controlled to be disconnected, and the transistor Q4 is pulled in. The system defaults to the low temperature segment logic and reads the temperature sampling value T.

[0104] Step 408: Determine whether the temperature sampling value is within the interval T>80°C. If so, execute step 409.

[0105] Step 409: Determine that the temperature is in the high temperature section.

[0106] Step 410: MOS tube Q2 is turned on, and transistor Q4 is turned off.

[0107] Here, when the MOS tube Q12 is energized, that is, the first switching switch is turned on, the driving signal is transmitted by the first driving channel and the second driving channel together, and the driving resistance is small. At this time, the turn-on loss of the IGBT is small, but the electromagnetic interference is slightly worse; the transistor Q4 is turned off, that is, the second switching switch is turned off, and at the moment when the IGBT Q1 is turned on, the fast recovery diode is turned off. The pulse current generated by the conduction time of the fast recovery diode will flow to the IGBT Q1 through the filter module, the transistor Q4 and the diode D1. At this time, the transistor Q4 is turned off, and the pulse current cannot flow to the IGBT Q1, thereby reducing the loss of the IGBT and further reducing its temperature rise and heat generation.

[0108] The embodiment of the present application also provides an air conditioner, including the aforementioned air conditioner controller. For example, the air conditioner can be a kitchen air conditioner. Due to the introduction of the electric control device of the embodiment of the present application, the temperature rise and heating of the power switch device in the PFC circuit can be effectively improved in a closed processing scenario, thereby improving the reliability of the operation of the kitchen air conditioner.

[0109] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0110] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An electronic control device, characterized in that: include: A power switch device, wherein a first end of the power switch device is connected to a power supply end, and a second end of the power switch device is grounded; A driving unit connected to the driving end of the power switch device and used for transmitting a driving signal; the driving unit comprises a first driving channel and a second driving channel connected to the driving end of the power switch device, and a first switching switch is provided on the first driving channel and / or the second driving channel; A power transmission unit is arranged between the first end of the power switch device and the power output end, the power transmission unit comprises a first transmission channel and a second transmission channel arranged in parallel, and a second switching switch is arranged on the first transmission channel and / or the second transmission channel; A temperature sampling module, the temperature sampling module is used to obtain the temperature value of the power switch device; A controller is connected to the temperature sampling module, the first switch, and the second switch, respectively, and is used to control the conduction state of the first switch and / or the second switch based on the temperature value of the power switch device.

2. The electronic control device according to claim 1, characterized in that: The electronic control device further comprises: A rectifier module, the output end of which is connected to the power supply end, is used to rectify the initial power supply and output it through the power supply end.

3. The electronic control device according to claim 2, characterized in that: The electronic control device further comprises: A PFC inductor, wherein a first end of the PFC inductor is connected to the output end of the rectifier module, and a second end of the PFC inductor is connected to the power supply end, for energy storage.

4. The electronic control device according to claim 1, characterized in that: The electronic control device further comprises: An electrolytic capacitor, wherein a first end of the electrolytic capacitor is connected to a second end of the power switch device, and a second end of the electrolytic capacitor is connected to the power supply output end for energy storage.

5. The electronic control device according to claim 1, characterized in that: The first transmission channel comprises: A freewheeling diode, wherein the anode of the freewheeling diode is connected to the first end of the power switch device, and the cathode of the freewheeling diode is connected to the power supply output end, for providing a current transmission path.

6. The electronic control device according to claim 1, characterized in that: The first switching switch comprises: A first switch tube provided on the first driving channel or the second driving channel, used to control the on-off state of the first driving channel or the second driving channel; The first driving channel has a first resistance state of forward conduction and a second resistance state of reverse conduction, and the second driving channel has a third resistance state of forward conduction and a fourth resistance state of reverse conduction.

7. The electronic control device according to claim 1, characterized in that: The second transmission channel is provided with a second switch, a first end of the second switch is connected to a first end of the power switch device, and the second transmission channel includes: A filtering module, wherein a first end of the filtering module is connected to a second end of the second switch, and a second end of the filtering module is connected to the power output end, for filtering high-frequency noise.

8. The electric control device according to claim 7, characterized in that: The second switch comprises: A second switch tube, wherein a first end of the second switch tube is connected to a first end of the filter module; a first diode, wherein an anode of the first diode is connected to the second end of the second switch tube, and a cathode of the first diode is connected to the first end of the power switch device; A second diode, wherein an anode of the second diode is connected to a first end of the power switch device, and a cathode of the second diode is connected to a first end of the second switch tube.

9. The electronic control device according to claim 7, characterized in that: The second switch comprises: A relay, wherein a first end of the relay is connected to a first end of the power switch device, and a second end of the relay is connected to a first end of the filter module; A third diode, wherein an anode of the third diode is connected to the first end of the power switch device, and a cathode of the third diode is connected to the first end of the filter module.

10. An air conditioning controller, characterized in that: It comprises a drive controller and the electric control device according to any one of claims 1 to 9, wherein the output end of the drive controller is connected to the input end of the drive unit of the electric control device.

11. An air conditioner, characterized in that: Comprising the air conditioning controller as claimed in claim 10.

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