CN219801883U - Compressor start-up protection circuit and electronic equipment - Google Patents
Compressor start-up protection circuit and electronic equipment Download PDFInfo
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- CN219801883U CN219801883U CN202320666959.3U CN202320666959U CN219801883U CN 219801883 U CN219801883 U CN 219801883U CN 202320666959 U CN202320666959 U CN 202320666959U CN 219801883 U CN219801883 U CN 219801883U
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Abstract
The utility model relates to a compressor starting protection circuit and electronic equipment. Comprising the following steps: the device comprises a first connecting end, a second connecting end, a power supply conversion unit, a delay power supply unit, a voltage detection unit, a switch unit and a controller; the first connecting end and the second connecting end are respectively connected with a main coil terminal and a secondary coil terminal of the compressor and a common terminal; the input end of the power supply conversion unit is connected with the first connecting end; the first output end of the power supply conversion unit is connected with the controller; the delay power supply unit is connected with the second output end of the power supply conversion unit and the controller; the voltage detection unit is connected with the third output end of the power conversion unit and is used for detecting the output voltage of the power conversion unit and generating a detection voltage; the controller is connected with the voltage detection unit and is used for generating a first control level or a second control level; the switch unit is connected with the controller, the first connecting end and the second connecting end and is used for being turned on when receiving the first control level and being turned off when receiving the second control level. The implementation of the utility model can greatly reduce the product cost.
Description
Technical Field
The utility model relates to the technical field of compressor protection, in particular to a compressor starting protection circuit and electronic equipment.
Background
When the compressor is started, a large moment is needed to be provided for smooth starting. When the high pressure and the low pressure of the compressor are unbalanced, larger starting moment is needed, the starting moment of the motor of the compressor is easily exceeded, the compressor is not started, and the compressor is damaged due to overcurrent. In general, when the compressor is restarted after sudden power failure, the working area gas is not completely discharged, and the phenomenon is caused. Therefore, it is extremely important to protect the compressor from startup during a compressor power-off restart.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a compressor starting protection circuit and electronic equipment.
The technical scheme adopted for solving the technical problems is as follows: a compressor start-up protection circuit is constructed comprising: the device comprises a first connecting end, a second connecting end, a power supply conversion unit, a delay power supply unit, a voltage detection unit, a switch unit and a controller;
the first connecting end is used for connecting a main coil terminal and a secondary coil terminal of the compressor, and the second connecting end is used for connecting a common terminal of the compressor;
the input end of the power supply conversion unit is connected with the first connecting end;
the first output end of the power supply conversion unit is connected with the controller and is used for generating a first power supply voltage corresponding to the controller;
the delay power supply unit is connected with the second output end of the power supply conversion unit and the controller and is used for generating a second power supply voltage corresponding to the controller within a preset time length of turning off the first power supply voltage, wherein the preset time length is greater than or equal to a first preset value;
the voltage detection unit is connected with the third output end of the power conversion unit and is used for detecting the output voltage of the power conversion unit and generating a detection voltage;
the controller is connected with the voltage detection unit and is used for starting timing and generating a first control level when the detected voltage is smaller than a second preset value, and ending timing and generating a second control level when the duration of timing is equal to the first preset value;
the switch unit is connected with the controller, the first connecting end and the second connecting end and is used for being turned off when receiving the first control level and turned on when receiving the second control level.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the power conversion unit includes a primary conversion circuit, a secondary conversion circuit, and a final conversion circuit;
the input end of the primary conversion circuit is connected with the first connecting end, the output end of the primary conversion circuit is connected with the input end of the secondary conversion circuit, and the output end of the secondary conversion circuit is connected with the input end of the final conversion circuit;
the output end of the final conversion circuit is connected with the power supply end of the controller;
the input end of the delay power supply unit is connected with the output end of the final stage conversion circuit, and the output end of the delay power supply unit is connected with the power supply end of the controller;
the input end of the voltage detection unit is connected with the output end of the secondary conversion circuit, and the output end of the voltage detection unit is connected with the detection voltage input end of the controller.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the delay power supply unit includes a first resistor, a first diode, a second diode, and a first charging capacitor;
the first end of the first resistor is connected with the output end of the final-stage conversion circuit, the second end of the first resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the first end of the first charging capacitor and the anode of the second diode, the cathode of the second diode is connected with the power supply end of the controller, and the second end of the first charging capacitor is grounded.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the final stage conversion circuit includes a power conversion chip, a fifth resistor, a sixth resistor and a third diode;
the third pin of the power conversion chip is connected with the output end of the secondary conversion circuit, the second pin of the power conversion chip is connected with the first end of the fifth resistor and the first end of the sixth resistor, the first pin of the power conversion chip is connected with the second end of the fifth resistor, the first end of the first resistor and the anode of the third diode, the second end of the sixth resistor is grounded, and the cathode of the third diode is connected with the power supply end of the controller.
Preferably, in an embodiment of the compressor start-up protection circuit according to the present utility model, the final stage conversion circuit further includes a fourth diode; and the anode of the fourth diode is connected with the first pin of the power conversion chip, and the cathode of the fourth diode is used for being connected with a load circuit.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the voltage detection unit includes a second resistor, a third resistor, and a fourth resistor;
the first end of the second resistor and the first end of the third resistor are connected with the output end of the secondary conversion circuit, and the second end of the third resistor is connected with the first end of the fourth resistor and the detection level input end of the controller; the second end of the second resistor and the second end of the fourth resistor are grounded.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the first connection terminal includes an L terminal for connecting to an ac live wire input and an N terminal for connecting to an ac neutral wire input, the first terminal of the switch unit is connected to the L terminal, the second terminal of the switch unit is connected to the second connection terminal, and the control terminal of the switch unit is connected to the first control level output terminal of the controller.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the switching unit includes a relay switching circuit and a driving circuit;
the power supply end of the driving circuit is connected with the output end of the secondary conversion circuit, the input end of the driving circuit is connected with the first control level output end of the controller, the output end of the driving circuit is connected with the first end of the relay switch circuit, and the second end of the relay switch circuit is connected with the output end of the secondary conversion circuit;
and the third end of the relay switch circuit is connected with the L end, and the fourth end of the relay switch circuit is connected with the second connecting end.
Preferably, in an embodiment of the compressor start-up protection circuit of the present utility model, the driving circuit includes a darlington array chip, a first input pin of the darlington array chip is connected to a first control level output end of the controller, and a first output pin of the darlington array chip is connected to a first end of the relay switch circuit; and/or
The L end, the N end and the second connecting end are integrated in a connector, a first power pin of the connector is the L end, an output pin of the connector is the second connecting end, and a second power pin of the connector is the N end.
The present utility model also constructs an electronic apparatus including the compressor start-up protection circuit as set forth in any one of the above.
The compressor starting protection circuit and the electronic equipment have the following beneficial effects: the protection of the power-off starting of the compressor is realized through a simple circuit, and the product cost is greatly reduced.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a compressor start-up protection circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a compressor start-up protection circuit according to another embodiment of the present utility model;
FIG. 3 is a schematic circuit diagram of one embodiment of a compressor start protection circuit of the present utility model;
FIG. 4 is a schematic circuit diagram of another embodiment of a compressor start protection circuit of the present utility model;
fig. 5 is a schematic circuit diagram of another embodiment of a compressor start protection circuit of the present utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of a compressor start-up protection circuit 100 of the present utility model, it includes: a first connection terminal 111, a second connection terminal 112, a power conversion unit 120, a delay power supply unit 130, a voltage detection unit 140, a switching unit 160, and a controller 150; the first connection end 111 is used for connecting a common terminal of the compressor, and the second connection end 112 is used for connecting a main coil terminal and a secondary coil terminal of the compressor; the input end of the power conversion unit 120 is connected with the first connection end 111; the first output end of the power conversion unit 120 is connected to the controller 150, and is configured to generate a first power supply voltage corresponding to the controller 150; the delay power supply unit 130 is connected to the second output end of the power supply conversion unit 120 and the controller 150, and is configured to generate a second power supply voltage corresponding to the controller 150 within a preset duration of turning off the first power supply voltage, where the preset duration is greater than or equal to a first preset value; the voltage detection unit 140 is connected to the third output end of the power conversion unit 120, and is configured to detect an output voltage of the power conversion unit 120 and generate a detection voltage; the controller 150 is connected to the voltage detection unit 140, and is configured to start timing and generate a first control level when the detected voltage is less than a second preset value, and end timing and generate a second control level when the duration of timing is equal to the first preset value; the switching unit 160 is connected to the controller 150, the first connection terminal 111, and the second connection terminal 112, and is turned off when receiving the first control level, and turned on when receiving the second control level. Specifically, the first connection end 111 is used for connecting a main coil terminal and a secondary coil terminal of the compressor, and the main coil terminal and the secondary coil terminal of the compressor are used for connecting a power supply to supply power. The second connection end 112 is used for connecting a common terminal of the compressor. Normally, when the primary and secondary coil terminals of the compressor are powered, they can provide a starting voltage through the second connection 112 to start the compressor. In the compressor start-up protection circuit, the power conversion unit 120 is connected to the first connection terminal 111, and is configured to perform voltage conversion on a power input of the first connection terminal 111 to obtain a corresponding voltage output. Meanwhile, the controller 150 is connected to the first output terminal of the power conversion unit 120 and is configured to receive an output voltage of the power conversion unit 120 as a supply voltage. The controller 150 is operated by power supply voltage. The delay power supply unit 130 is connected to the second output terminal of the power conversion unit 120, and is configured to provide the second power supply voltage to the controller 150 when the controller 150 is powered by the first power supply voltage, so that the controller 150 can maintain an on power state for a preset period of time. I.e., the time-lapse power supply unit 130 is capable of generating the second power supply voltage for a preset period of time to supply power to the controller 150. The preset duration may be set to be greater than or equal to a first preset value. The voltage detection unit 140 may detect the power supply state of the compressor, that is, when the voltage of the power supply terminal of the compressor is reduced or turned off, the output voltage of the third output terminal of the corresponding power conversion unit 120 may be turned off or reduced, when the controller 150 receives the detected voltage as a lower level, the first control level is generated and timing is started at the same time, and when the timing duration satisfies the first preset value, the timing is ended and the second control level is output. In this embodiment, the process of starting and ending the timer by the controller 150 may employ a timer triggering process currently common to the controller 150, which is not limited herein. I.e. generating a first control level based on the start of the timing and a second control level based on the end of the timing is implemented by a general timing function within the controller 150. In one embodiment, the controller 150 includes an MCU chip U6 and its peripheral circuitry. In one embodiment, the MCU chip U6 may be an R7F0C series chip.
Alternatively, as shown in fig. 2 and 3, the power conversion unit 120 includes a primary conversion circuit 121, a secondary conversion circuit 122, and a final conversion circuit 123; the input end of the primary conversion circuit 121 is connected with the first connection end 111, the output end of the primary conversion circuit 121 is connected with the input end of the secondary conversion circuit 122, and the output end of the secondary conversion circuit 122 is connected with the input end of the final conversion circuit 123; the output end of the final stage conversion circuit 123 is connected with the power supply end of the controller 150; the input end of the delay power supply unit 130 is connected with the output end of the final stage conversion circuit 123, and the output end of the delay power supply unit 130 is connected with the power supply end of the controller 150; an input terminal of the voltage detection unit 140 is connected to an output terminal of the secondary conversion circuit 122, and an output terminal of the voltage detection unit 140 is connected to a detection voltage input terminal of the controller 150. Specifically, the power conversion unit 120 may be composed of a multi-stage conversion circuit. Which may include in particular a primary conversion circuit 121, a secondary conversion circuit 122 and a final conversion circuit 123. The primary conversion circuit 121 is used for performing primary conversion on the power input of the first connection terminal 111, and may be composed of a rectifier bridge DA1 and peripheral circuits thereof. In an embodiment, the input end of the rectifier bridge DA1 is further provided with various protection circuits to protect the post-stage circuit. The secondary conversion circuit 122 is configured to step down the output voltage of the rectifier bridge DA 1. Wherein the secondary conversion circuit 122 may be a switching power supply circuit such as a flyback switching power supply. The voltage detection unit 140 is configured to detect an output voltage of the secondary conversion circuit 122 to obtain a corresponding detection voltage. In one embodiment, the output voltage of the secondary conversion circuit 122 may also be used to power other desired circuits. The final stage conversion circuit 123 is configured to further step down the output voltage of the secondary conversion circuit 122 to meet the power supply requirement of the controller 150. In one embodiment, the output voltage of the secondary conversion circuit 122 may also be used to power other desired circuits.
Optionally, as shown in fig. 4, the delay power supply unit 130 includes a first resistor, a first diode, a second diode, and a first charging capacitor; the first end of the first resistor is connected with the output end of the final stage conversion circuit 123, the second end of the first resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the first end of the first charging capacitor and the anode of the second diode, the cathode of the second diode is connected with the power supply end of the controller 150, and the second end of the first charging capacitor is grounded. In one embodiment, the first resistor comprises resistor R59, the first diode comprises diode D17, the second diode comprises diode D18, and the first charge capacitor comprises charge capacitor CE6. The output voltage of the final stage conversion circuit 123 charges the charging capacitor CE6 through the resistor R59 and the diode D17, and the diode D17 is turned on in the forward direction and isolated in the reverse direction, so as to prevent the current from flowing back to the output end of the final stage conversion circuit 123 when the charging capacitor CE6 discharges, and damage the final stage conversion circuit 123. When the first power supply unit is turned off, the charging capacitor CE6 discharges and forms a second power supply voltage at the power supply terminal of the controller 150 through the diode D18. Diode D18 is forward conducting reverse isolated. The specification of the charging capacitor CE6 may be reasonably selected, so that the discharging time of the charging capacitor CE6 is greater than or equal to the first preset value.
Optionally, the final stage conversion circuit 123 includes a power conversion chip, a fifth resistor, a sixth resistor, and a third diode; the third pin of the power conversion chip is connected to the output end of the secondary conversion circuit 122, the second pin of the power conversion chip is connected to the first end of the fifth resistor and the first end of the sixth resistor, the first pin of the power conversion chip is connected to the second end of the fifth resistor, the first end of the first resistor and the anode of the third diode, the second end of the sixth resistor is grounded, and the cathode of the third diode is connected to the power supply end of the controller 150. Specifically, in the final stage switching circuit 123, the power conversion chip may include an LDO chip U1, the fifth resistor includes a resistor R65, the sixth resistor includes a resistor R66, and the third diode includes a diode D16. The third pin of the LDO chip U1 is connected to the output end of the secondary conversion circuit 122, the second pin of the LDO chip U1 is connected to the first end of the first end resistor R65 of the resistor R66, the second end of the resistor R66 is grounded, and the second end of the resistor R65 is connected to the first pin of the LDO chip U1. The first pin of the LDO chip U1 is simultaneously connected with the anode of the diode D16, and the cathode of the diode D16 is connected with the power supply end of the controller 150. In one embodiment, final stage conversion circuit 123 further includes a capacitor CE1 and a capacitor C2. The first pin of the LDO chip U1 is grounded through a capacitor CE1 and a capacitor C2 which are connected in parallel, and the output voltage of the first pin of the LDO chip U1 is filtered through the capacitor CE1 and the capacitor C2.
Optionally, the final stage conversion circuit 123 further includes a fourth diode; the anode of the fourth diode is connected with the first pin of the power conversion chip, and the cathode of the fourth diode is used for being connected with the load circuit. In particular, the output of the power conversion chip may also be used to power other circuits. As shown in fig. 4, the fourth diode includes a diode D2, the first pin of the LDO chip U1 is connected to the anode of the diode D2, and the output voltage is provided through the cathode of the diode D2 to supply power to the load circuit.
Alternatively, as shown in fig. 5, the voltage detection unit 140 includes a second resistor, a third resistor, and a fourth resistor; the first end of the second resistor and the first end of the third resistor are connected with the output end of the secondary conversion circuit 122, and the second end of the third resistor is connected with the first end of the fourth resistor and the detection level input end of the controller 150; the second end of the second resistor and the second end of the fourth resistor are grounded. Specifically, the second resistor may include a resistor R90, the third resistor may include a resistor R98, and the fourth resistor may include a resistor R99, where the output voltage of the output terminal of the secondary conversion circuit 122 may form a voltage division at a connection node of the resistor R98 and the resistor R99 connected in series, that is, a detection voltage is obtained at a connection node of the resistor R98 and the resistor R99. The detection level input terminal of the controller 150 is used to receive the detection voltage.
Alternatively, as shown in fig. 3, the first connection terminal 111 includes an L terminal for connecting to an ac live input and an N terminal for connecting to an ac neutral input, a first terminal of the switching unit 160 is connected to the L terminal, a second terminal of the switching unit 160 is connected to the second connection terminal 112, and a control terminal of the switching unit 160 is connected to a first control level output terminal of the controller 150. Specifically, the power supply end of the compressor includes a live wire power supply end and a neutral wire power supply end, and the first connection end 111 includes an L end for connecting with an ac live wire input and an N end for connecting with an ac neutral wire input. The first terminal of the switch unit 160 is connected to the L terminal, and the second terminal of the switch unit 160 is connected to the second connection terminal 112. The control terminal of the switching unit 160 is connected to the first control level output terminal of the controller 150, and is configured to receive the first control level or the second control level output by the controller 150. When the switching unit 160 is operated, if the first control level is received, the off state is maintained, and at this time, the starting end of the compressor has no voltage input, and the compressor is not operated. The switching unit 160 maintains a conductive state when receiving the second control level, and at this time, the input of the L terminal is powered on to the start terminal of the compressor through the conductive switching unit 160, and at this time, the compressor starts to start up. The duration of the first control level is controlled to control the turn-off time of the switching unit 160, and then the start interval time of the compressor is controlled, so that a sufficient recovery time is ensured after power-down.
Optionally, the switching unit 160 includes a relay switching circuit and a driving circuit; the power supply end of the driving circuit is connected with the output end of the secondary conversion circuit 122, the input end of the driving circuit is connected with the first control level output end of the controller 150, the output end of the driving circuit is connected with the first end of the relay switch circuit, and the second end of the relay switch circuit is connected with the output end of the secondary conversion circuit 122; the third terminal of the relay switch circuit is connected to the L terminal, and the fourth terminal of the relay switch circuit is connected to the second connection terminal 112. Specifically, as shown in fig. 3, the relay switch circuit may include a relay RY1 and its peripheral circuit, an input terminal of the driving circuit is connected to a first level output terminal of the controller 150 for receiving the first control level or the second control level, an output terminal of the driving circuit is connected to a first terminal of a coil of the relay RY1, and a second terminal of the coil of the relay RY1 is connected to an output terminal of the secondary conversion circuit 122. The power supply end of the driving circuit is connected with the output end of the secondary conversion circuit 122, and is powered by the output voltage of the secondary conversion circuit 122 to work. When the driving circuit works, a high level or a low level is output correspondingly according to the received first control level or the received second control level. When the driving circuit outputs a high level, the coil of the relay RY1 is not energized, and the contact of the relay RY1 is in an off state, i.e., the entire switching unit 160 maintains an off state. When the driving circuit outputs a low level, the coil of the relay RY1 is energized, and the contacts of the relay RY1 are closed and turned on, i.e., the entire switching unit 160 maintains a conductive state. The first end of the coil of the relay RY1 is also connected with the anode of the diode D5, the second end of the coil of the relay RY1 is connected with the cathode of the diode D5, and the coil of the relay RY1 is discharged through the diode D5.
Optionally, a light-emitting indication circuit is further provided in the switch unit 160, and indicates the power-on state of the compressor through the light-emitting indication circuit. The luminous indication circuit comprises a Light Emitting Diode (LED) 1 and a resistor R68, wherein a first end of the resistor R68 is connected with the output end of the secondary conversion circuit 122, a second end of the resistor R68 is connected with the anode of the Light Emitting Diode (LED) 1, the cathode of the Light Emitting Diode (LED) 1 is connected with the output end of the driving circuit, and when the output end of the driving circuit outputs a low level, the Light Emitting Diode (LED) 1 emits light, and at the moment, the compressor is in a working state, namely, the working state of the compressor can be indicated through the Light Emitting Diode (LED) 1.
Optionally, the driving circuit includes a darlington array chip, and a first input pin of the darlington array chip is connected to a first control level output end of the controller 150, and a first output pin of the darlington array chip is connected to a first end of the relay switch circuit. Specifically, the driving circuit is integrated in a darlington array chip U8, that is, the first input pin of the darlington array chip U8 is used to receive the first control level or the second control level output by the controller 150, and the first output pin is used to output the corresponding driving level.
Optionally, other input pins of the darlington array chip U8 are used to connect to other control level outputs of the controller 150, and corresponding output pins thereof are used to drive corresponding load circuits (not shown in the figure) to operate.
Optionally, the L end, the N end, and the second connection end 112 are integrated in a connector, a first power pin of the connector is the L end, an output pin of the connector is the second connection end 112, and a second power pin of the connector is the N end. Specifically, the first connection end 111 and the second connection end 112 may be integrated in a connector, the connector may include a connector CON1, a first pin, i.e. a first power pin, of the connector CON1 corresponds to an L end of the first connection end 111, a third pin, i.e. an output pin, of the connector CON1 corresponds to the second connection end 112, and a fifth pin, i.e. a second power pin, of the connector CON1 corresponds to an N end of the first connection end 111.
In addition, an electronic device of the present utility model includes the compressor start-up protection circuit as set forth in any one of the above. Specifically, the compressor starting circuit is connected with the corresponding connection terminal of the compressor through the first connection end 111 and the second connection end 112, can control the compressor to enter a working state when the compressor is connected with a power input, and controls the delayed starting of the compressor according to the power-down state of the power input, so that the protection of the compressor circuit is realized.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A compressor start-up protection circuit, comprising: the device comprises a first connecting end, a second connecting end, a power supply conversion unit, a delay power supply unit, a voltage detection unit, a switch unit and a controller;
the first connecting end is used for connecting a main coil terminal and a secondary coil terminal of the compressor, and the second connecting end is used for connecting a common terminal of the compressor;
the input end of the power supply conversion unit is connected with the first connecting end;
the first output end of the power supply conversion unit is connected with the controller and is used for generating a first power supply voltage corresponding to the controller;
the delay power supply unit is connected with the second output end of the power supply conversion unit and the controller and is used for generating a second power supply voltage corresponding to the controller within a preset time length of turning off the first power supply voltage, wherein the preset time length is greater than or equal to a first preset value;
the voltage detection unit is connected with the third output end of the power conversion unit and is used for detecting the output voltage of the power conversion unit and generating a detection voltage;
the controller is connected with the voltage detection unit and is used for starting timing and generating a first control level when the detected voltage is smaller than a second preset value, and ending timing and generating a second control level when the duration of timing is equal to the first preset value;
the switch unit is connected with the controller, the first connecting end and the second connecting end and is used for being turned off when receiving the first control level and turned on when receiving the second control level.
2. The compressor start-up protection circuit according to claim 1, wherein the power supply conversion unit includes a primary conversion circuit, a secondary conversion circuit, and a final conversion circuit;
the input end of the primary conversion circuit is connected with the first connecting end, the output end of the primary conversion circuit is connected with the input end of the secondary conversion circuit, and the output end of the secondary conversion circuit is connected with the input end of the final conversion circuit;
the output end of the final conversion circuit is connected with the power supply end of the controller;
the input end of the delay power supply unit is connected with the output end of the final stage conversion circuit, and the output end of the delay power supply unit is connected with the power supply end of the controller;
the input end of the voltage detection unit is connected with the output end of the secondary conversion circuit, and the output end of the voltage detection unit is connected with the detection voltage input end of the controller.
3. The compressor start-up protection circuit of claim 2, wherein the delay power supply unit comprises a first resistor, a first diode, a second diode, and a first charge capacitor;
the first end of the first resistor is connected with the output end of the final-stage conversion circuit, the second end of the first resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the first end of the first charging capacitor and the anode of the second diode, the cathode of the second diode is connected with the power supply end of the controller, and the second end of the first charging capacitor is grounded.
4. The compressor start-up protection circuit of claim 3, wherein the final stage switching circuit comprises a power switching chip, a fifth resistor, a sixth resistor, and a third diode;
the third pin of the power conversion chip is connected with the output end of the secondary conversion circuit, the second pin of the power conversion chip is connected with the first end of the fifth resistor and the first end of the sixth resistor, the first pin of the power conversion chip is connected with the second end of the fifth resistor, the first end of the first resistor and the anode of the third diode, the second end of the sixth resistor is grounded, and the cathode of the third diode is connected with the power supply end of the controller.
5. The compressor start-up protection circuit of claim 4, wherein the last stage switching circuit further comprises a fourth diode; and the anode of the fourth diode is connected with the first pin of the power conversion chip, and the cathode of the fourth diode is used for being connected with a load circuit.
6. The compressor start-up protection circuit according to claim 2, wherein the voltage detection unit includes a second resistor, a third resistor, and a fourth resistor;
the first end of the second resistor and the first end of the third resistor are connected with the output end of the secondary conversion circuit, and the second end of the third resistor is connected with the first end of the fourth resistor and the detection level input end of the controller; the second end of the second resistor and the second end of the fourth resistor are grounded.
7. The compressor start-up protection circuit of claim 2, wherein the first connection terminal includes an L terminal for connecting an ac live input and an N terminal for connecting an ac neutral input, the first terminal of the switching unit is connected to the L terminal, the second terminal of the switching unit is connected to the second connection terminal, and the control terminal of the switching unit is connected to the first control level output terminal of the controller.
8. The compressor start-up protection circuit of claim 7, wherein the switching unit includes a relay switching circuit and a driving circuit;
the power supply end of the driving circuit is connected with the output end of the secondary conversion circuit, the input end of the driving circuit is connected with the first control level output end of the controller, the output end of the driving circuit is connected with the first end of the relay switch circuit, and the second end of the relay switch circuit is connected with the output end of the secondary conversion circuit;
and the third end of the relay switch circuit is connected with the L end, and the fourth end of the relay switch circuit is connected with the second connecting end.
9. A compressor start-up protection circuit according to claim 8, wherein,
the driving circuit comprises a Darlington array chip, a first input pin of the Darlington array chip is connected with a first control level output end of the controller, and a first output pin of the Darlington array chip is connected with a first end of the relay switch circuit; and/or
The L end, the N end and the second connecting end are integrated in a connector, a first power pin of the connector is the L end, an output pin of the connector is the second connecting end, and a second power pin of the connector is the N end.
10. An electronic device comprising a compressor start-up protection circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320666959.3U CN219801883U (en) | 2023-03-24 | 2023-03-24 | Compressor start-up protection circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320666959.3U CN219801883U (en) | 2023-03-24 | 2023-03-24 | Compressor start-up protection circuit and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN219801883U true CN219801883U (en) | 2023-10-03 |
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|---|---|---|---|
| CN202320666959.3U Active CN219801883U (en) | 2023-03-24 | 2023-03-24 | Compressor start-up protection circuit and electronic equipment |
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| Country | Link |
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| CN (1) | CN219801883U (en) |
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