Control device for positive and negative rotation of alternating current motor and kitchen waste processor

Abstract

The utility model relates to the technical field of AC motors, and discloses an AC motor positive and negative rotation control device and a kitchen garbage processor, and the device comprises an AC high potential end, an AC low potential end, a drive switch module, a silicon controlled rectifier module, a control module, a first regulation and control module and a second regulation and control module. The second regulation and control module is connected with the starting coil; the silicon controlled module, the second regulation and control module and the driving switch module are connected with the control module; the alternating-current high-potential end is connected with the second regulation and control module, and the alternating-current low-potential end is connected with the second regulation and control module through the driving switch module and the silicon controlled rectifier module; the driving switch module is connected with the second regulation and control module and the alternating-current low-potential end; the silicon controlled rectifier module is connected with the second regulation and control module and the alternating current low-potential end. The influence of impulse voltage and current on the second regulation and control module can be reduced, the supply of the alternating current power supply to the second regulation and control module is controlled, the intelligent degree of forward and reverse rotation control of the alternating current motor is improved, and the use safety of the kitchen garbage processor is improved.

Description

Technical Field

[0001] This utility model relates to the field of AC motor technology, and in particular to a control device for forward and reverse rotation of an AC motor and a food waste disposer. Background Technology

[0002] In existing technologies, AC motors can provide a large torque when starting, which is very advantageous for scenarios that require high torque to crush hard waste and kitchen waste. However, most AC motors control forward and reverse rotation by directly connecting switching devices to the AC power supply. The instantaneous current and voltage of the AC power supply can affect the switching devices, which may pose a safety hazard. Furthermore, it is difficult to intelligently control the input of the AC power supply to the forward and reverse rotation control, resulting in a low level of intelligence. Utility Model Content

[0003] The purpose of this invention is to provide a control device for the forward and reverse rotation of an AC motor and a food waste disposer, so as to solve one or more technical problems existing in the prior art, or at least provide a beneficial option or create conditions.

[0004] To achieve the above objectives, some embodiments of this application provide a control device for the forward and reverse rotation of an AC motor. The device includes: an AC high potential terminal, an AC low potential terminal, a drive switch module, a thyristor module, a control module, a first control module, and a second control module.

[0005] The output terminal of the first control module is connected to the main coil of the AC motor, and the input terminal of the first control module is connected to the control module.

[0006] The AC high-potential terminal is connected to the main coil through the first control module, and the AC low-potential terminal is connected to the main coil.

[0007] The output terminal of the second control module is connected to the starting coil of the AC motor, and the input terminal of the second control module is connected to the control module.

[0008] The AC high-potential terminal is connected to the power supply terminal of the second control module, and the AC low-potential terminal is connected to the second control module through the drive switch module and the thyristor module respectively.

[0009] The output terminal of the drive switch module is connected to the second regulation module and the AC low potential terminal, respectively, and the input terminal of the drive switch module is connected to the control module.

[0010] The output terminal of the thyristor module is connected to the second regulation module and the AC low potential terminal, respectively, and the input terminal of the thyristor module is connected to the control module.

[0011] Furthermore, the control device for forward and reverse rotation of the AC motor also includes: a buffer capacitor;

[0012] One end of the buffer capacitor is connected to the AC high potential terminal, and the other end of the buffer capacitor is connected to the power supply terminal of the second control module.

[0013] Furthermore, the second control module includes: a first relay, a second relay, a first drive circuit, and a second drive circuit;

[0014] The input terminal of the first driving circuit is connected to the output terminal of the control module, and the output terminal of the first driving circuit is connected to the driving terminal of the first relay.

[0015] The input terminal of the second driving circuit is connected to the output terminal of the control module, and the output terminal of the second driving circuit is connected to the driving terminal of the second relay.

[0016] The common terminal of the first relay and the common terminal of the second relay are both connected to the starting coil; the first contact of the first relay and the first contact of the second relay are both connected to the other end of the buffer capacitor.

[0017] The second contact of the first relay is connected to the AC low-potential terminal through the drive switch module and the thyristor module;

[0018] The second contact of the second relay is connected to the AC low potential terminal through the drive switch module and the thyristor module.

[0019] Furthermore, the drive switch module includes: a third relay and a third drive circuit;

[0020] The input terminal of the third driving circuit is connected to the output terminal of the control module, and the output terminal of the third driving circuit is connected to the driving terminal of the third relay.

[0021] The common terminal of the third relay is connected to the second contact of the first relay and the second contact of the second relay, respectively, and the contact of the third relay is connected to the AC low potential terminal.

[0022] Furthermore, the thyristor module includes: a thyristor and a fourth driving circuit;

[0023] The input terminal of the fourth driving circuit is connected to the output terminal of the control module, and the output terminal of the fourth driving circuit is connected to the driving terminal of the thyristor.

[0024] The anode of the thyristor is connected to the second contact of the first relay and the second contact of the second relay, respectively, and the cathode of the thyristor is connected to the AC low potential terminal.

[0025] Furthermore, the first control module includes: a fourth relay, a fifth drive circuit, and a parallel current-limiting resistor group;

[0026] The input terminal of the fifth driving circuit is connected to the output terminal of the control module, and the output terminal of the fifth driving circuit is connected to the driving terminal of the fourth relay.

[0027] One end of the main coil is connected to the AC high potential terminal through the fourth relay, and the other end of the main coil is connected to the AC low potential terminal through the parallel current-limiting resistor group.

[0028] Furthermore, the control device for forward and reverse rotation of the AC motor also includes: a zero-crossing detection module;

[0029] The input terminal of the zero-crossing detection module is connected to the AC high-potential terminal, and the output terminal of the zero-crossing detection module is connected to the input terminal of the control module. The zero-crossing detection module is used to detect the zero-crossing point of the AC signal output from the AC high-potential terminal.

[0030] Furthermore, the control device for forward and reverse rotation of the AC motor also includes: a current detection module;

[0031] The input terminal of the current detection module is connected to the AC low potential terminal and the other end of the main coil, respectively. The output terminal of the current detection module is connected to the input terminal of the control module. The current detection module is used to detect the operating current of the main coil.

[0032] Furthermore, the thyristor module also includes: a thermistor;

[0033] One end of the thermistor is connected to the second contact of the first relay and the second contact of the second relay, respectively, and the other end of the thermistor is connected to the anode of the thyristor.

[0034] Some embodiments of this application provide a food waste disposer, including a control device for the forward and reverse rotation of an AC motor, as described in some embodiments of this application.

[0035] The beneficial effects of this invention are as follows: By indirectly connecting the AC low-potential terminal and the second control module through the drive switch module and the thyristor module, the impact of inrush voltage and inrush current on the second control module can be reduced, increasing its service life. The AC power supply to the second control module can be controlled by switching the drive switch module and / or the thyristor module on and off, improving the intelligence of the AC motor's forward and reverse rotation control. Furthermore, the combination of the drive switch module and the thyristor module achieves electrical isolation, reducing the risk of electric shock and improving the safety of the food waste disposer. Compared to the prior art where the module is placed at a high potential, placing the module at the AC low potential facilitates the installation and maintenance of the food waste disposer, making operation more convenient and safer. Attached Figure Description

[0036] Figure 1 This is a partial circuit diagram of a control device for forward and reverse rotation of an AC motor according to an embodiment of the present invention;

[0037] Figure 2 This is a partial circuit diagram of a control device for forward and reverse rotation of an AC motor according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the frame of a control device for forward and reverse rotation of an AC motor provided in an embodiment of this utility model.

[0039] Reference numerals: Control module 100, Second regulation module 200, First relay K1, Second relay K2, First drive circuit 210, Second drive circuit 220, Drive switch module 300, Third relay K3, Third drive circuit 310, Buffer capacitor C1, SCR module 400, Thermistor RT1, SCR TYN, Fourth drive circuit 410, First regulation module 500, Tenth resistor R10, First capacitor C1, Eleventh resistor R11, Twelfth resistor R12, Fourth relay K4, Fifth drive circuit 510, Parallel current limiting resistor group 520, AC low potential terminal ACN, AC high potential terminal ACL, Main coil L1, Start-up coil L2, Zero-crossing detection module 600, Current detection module 700. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and should not be construed as limiting the scope of this invention.

[0041] It should be noted that although functional modules are divided in the diagram, in some cases, the modules can be divided differently from those in the system.

[0042] Furthermore, it is understood that the terms "first," "second," etc., used in this application may be used herein to describe various concepts, but unless specifically stated otherwise, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more features. For example, without departing from the scope of embodiments of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the words "if" or "when" as used herein may be interpreted as "in the event of," "when," or "in response to a determination."

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0044] The coils inside an AC motor are divided into main coils and auxiliary coils. The main coil is the main power source of the motor, while the auxiliary coil is responsible for guiding the rotor to turn in a specified direction when the motor starts.

[0045] As described in the background art, in the prior art, AC motors can provide a large torque when starting, which is very advantageous for scenarios that require high torque to crush hard waste and kitchen waste. However, most AC motors control forward and reverse rotation by directly connecting switching devices to AC power. The instantaneous current and voltage of the AC power supply will affect the switching devices, which may pose a safety hazard. Furthermore, it is difficult to intelligently control the input of the AC power supply to the forward and reverse rotation control, resulting in a low level of intelligence.

[0046] In view of this, this application provides a control device for the forward and reverse rotation of an AC motor and a food waste disposer, so as to improve the service life and intelligence level of the forward and reverse rotation control of the AC motor and improve the safety of the operation of the food waste disposer.

[0047] Reference Figures 1 to 3 In some embodiments of this utility model, a control device for forward and reverse rotation of an AC motor includes: a control module 100, a second regulation module 200, a drive switch module 300, a buffer capacitor C1, a thyristor module 400, a first regulation module 500, an AC low-potential terminal ACN, and an AC high-potential terminal ACL.

[0048] The output of the first control module 500 is connected to the main coil L1 of the AC motor, and the output of the control module 100 is connected to the input of the first control module 500. The first control module 500 is also connected to the AC high-potential terminal ACL, so that the AC high-potential terminal ACL is connected to the main coil L1 through the first control module 500.

[0049] The AC low potential terminal ACN is connected to the other end of the main coil L1.

[0050] The first control module 500 is used to receive the first control signal output by the control module 100 and to connect one end of the main coil L1 to the AC high potential terminal ACL.

[0051] The output of the second control module 200 is connected to the starting coil L2 of the AC motor, and the output of the control module 100 is connected to the input of the second control module 200. The AC low-potential terminal ACN is connected to the second control module 200 through the drive switch module 300, and the AC low-potential terminal ACN is also connected to the second control module 200 through the thyristor module 400, meaning that the drive switch module 300 and the thyristor module 400 are connected in parallel.

[0052] The AC high-potential terminal ACL is connected to the power supply terminal of the second control module 200 through a buffer capacitor C1. That is, the AC high-potential terminal ACL is connected to one end of the buffer capacitor C1, and the other end of the buffer capacitor C1 is connected to the power supply terminal of the second control module 200, so as to buffer the inrush current and inrush voltage of the AC power supply.

[0053] The second control module 200 is used to receive the second control signal output by the control module 100 and adjust the current flow direction of the starting coil L2 to control the rotation direction of the AC motor.

[0054] The output terminal of the drive switch module 300 is connected to the second control module 200, and the output terminal of the drive switch module 300 is connected to the AC low-potential terminal ACN. The input terminal of the drive switch module 300 is connected to the output terminal of the control module 100. The AC low-potential terminal ACN is connected to the second control module 200 via the drive switch module 300.

[0055] The drive switch module 300 is used to receive the third control signal output by the control module 100 and turn on the AC low potential terminal ACN and the second regulation module 200.

[0056] The output terminal of the SCR module 400 is connected to the second control module 200, and the output terminal of the SCR module 400 is connected to the AC low-potential terminal ACN. The input terminal of the SCR module 400 is connected to the output terminal of the control module 100. The AC low-potential terminal ACN is connected to the second control module 200 via the SCR module 400.

[0057] The thyristor module 400 is used to receive the fourth control signal output by the control module 100, and to turn on the AC low potential terminal ACN and the second regulation module 200.

[0058] In one embodiment, the control module 100 controls the first regulation module 500 and the second regulation module 200 to keep the main coil L1 and the starting coil L2 in an open state. The control module 100 outputs a first control signal to close the main coil L1. After 200ms, the control module 100 outputs a second control signal to close the starting coil L2. After the starting coil L2 is closed for 300ms, the control module 100 controls the second regulation module 200 to keep the starting coil L2 in an open state. The closing time of the starting coil L2 should not be too long to prevent abnormal starting. By adjusting the second control signal, the starting torque of the AC motor is increased, and the starting process of the AC motor is completed.

[0059] In this process, the control module 100 controls the first regulation module 500 and the second regulation module 200. Before starting the AC motor, the control module 100 outputs a third control signal and / or a fourth control signal to control the drive switch module 300 and / or the thyristor module 400 to connect the AC low potential terminal ACN with the second regulation module 200.

[0060] By indirectly connecting the AC low-potential terminal ACN and the second control module 200 through the drive switch module 300 and the thyristor module 400, the inrush current and inrush voltage of the AC power supply are buffered, thereby improving the service life of the second control module 200. The supply of AC power to the second control module 200 can be controlled by controlling the on / off state of the drive switch module 300 and / or the thyristor module 400, thereby improving the intelligence level of the forward and reverse rotation control of the AC motor.

[0061] Since food waste disposers are usually installed under the kitchen sink and have a high chance of coming into contact with water, combining the drive switch module 300 and the thyristor module 400 at the low potential end can achieve electrical isolation, reduce the risk of electric shock, and improve the safety of using the food waste disposer.

[0062] Compared with the existing technology that sets the drive switch module 300 and the thyristor module 400 at the high potential, the low potential end has a lower voltage, which makes it easier to install or maintain the food waste disposer, making the operation more convenient and safer.

[0063] Reference Figures 1 to 3 In some embodiments of this utility model, the second control module 200 includes: a first drive circuit 210, a first relay K1, a second relay K2, and a second drive circuit 220.

[0064] The input terminal of the first driving circuit 210 is connected to the output terminal of the control module 100, and the output terminal of the first driving circuit 210 is connected to the driving terminal of the first relay K1, that is, connected to the third and fourth pins of the first relay K1.

[0065] The common terminal of the first relay K1 is connected to one end of the starting coil L2, the first contact of the first relay K1 is connected to the buffer capacitor C1, the second contact of the first relay K1 is connected to the drive switch module 300, and the second contact of the first relay K1 is connected to the thyristor module 400.

[0066] That is, the first pin of the first relay K1 is connected to one end of the start coil L2, the second pin of the first relay K1 is connected to the buffer capacitor C1, and the fifth pin of the first relay K1 is connected to the drive switch module 300 and also to the thyristor module 400.

[0067] The input terminal of the second drive circuit 220 is connected to the output terminal of the control module 100, and the output terminal of the second drive circuit 220 is connected to the drive terminal of the second relay K2, that is, connected to the third and fourth pins of the second relay K2.

[0068] The common terminal of the second relay K2 is connected to the other end of the starting coil L2. The first contact of the second relay K2 is connected to the buffer capacitor C1. The second contact of the second relay K2 is connected to the drive switch module 300. The second contact of the second relay K2 is also connected to the thyristor module 400. In other words, the first pin of the second relay K2 is connected to the other end of the starting coil L2, the second pin of the second relay K2 is connected to the buffer capacitor C1, and the fifth pin of the second relay K2 is connected to both the drive switch module 300 and the thyristor module 400.

[0069] In one embodiment, the control module 100 outputs a third control signal and / or a fourth control signal to control the drive switch module 300 and / or the thyristor module 400 to turn on the AC low-potential terminal ACN. The control module 100 outputs a second control signal. According to the second control signal, the common terminal of the first relay K1 closes with the second contact, and the common terminal of the second relay K2 closes with the first contact. The current flow in the starting coil L2 is from one end to the other, i.e., from the R end to the L end, and the AC motor rotates forward for 300ms. Alternatively, according to the second control signal, the common terminal of the first relay K1 closes with the first contact, and the common terminal of the second relay K2 closes with the second contact. The current flow in the starting coil L2 is from one end to the other, i.e., from the L end to the R end, and the AC motor rotates in reverse for 300ms.

[0070] The direction of motor rotation is controlled by two single-pole double-throw relays, first K1 and second K2. Only one of the first relays K1 and second relay K2 can be closed at the same time. That is, when the first relay K1 is closed and the second relay K2 is open, it is forward rotation, and when the first relay K1 is open and the second relay K2 is closed, it is reverse rotation. This realizes the forward and reverse rotation control of AC motor. The forward and reverse rotation control of AC motor requires the control module 100 to control the drive switch module 300 and / or the thyristor module 400, and to conduct the AC low potential terminal ACN with the second regulation module 200.

[0071] Reference Figures 1 to 3 In some embodiments of this utility model, the drive switch module 300 includes: a third drive circuit 310 and a third relay K3.

[0072] The input terminal of the third drive circuit 310 is connected to the output terminal of the control module 100, and the output terminal of the third drive circuit 310 is connected to the drive terminal of the third relay K3, that is, connected to the first and second pins of the third relay K3.

[0073] The common terminal of the third relay K3 is connected to the second contact of the first relay K1, and the common terminal of the third relay K3 is connected to the second contact of the second relay K2. That is, the sixth pin of the third relay K3 is connected to the fifth pin of the first relay K1 and the fifth pin of the second relay K2. The contacts of the third relay K3 are connected to the AC low-potential terminal ACN, that is, the eighth pin of the third relay K3 is connected to the AC low-potential terminal ACN.

[0074] In one embodiment, the control module 100 outputs a third control signal, and the third drive circuit 310 controls the drive end of the third relay K3 to operate, so as to close the switch of the third relay K3 and conduct the AC low potential terminal ACN to the second control module 200.

[0075] Reference Figures 1 to 3 In some embodiments of this utility model, the thyristor module 400 includes: a thermistor RT1, a thyristor TYN, and a fourth driving circuit 410.

[0076] One end of the thermistor RT1 is connected to the second contact of the first relay K1, and the other end of the thermistor RT1 is connected to the anode of the thyristor TYN.

[0077] The cathode of the thyristor TYN is connected to the AC low potential terminal ACN, the driving terminal of the thyristor TYN is connected to the output terminal of the fourth driving circuit 410, and the input terminal of the fourth driving circuit 410 is connected to the output terminal of the control module 100.

[0078] In one embodiment, the control module 100 outputs a fourth control signal, and the fourth drive circuit 410 drives the thyristor TYN to conduct the AC low potential terminal ACN and the second control module 200.

[0079] By combining thermistor RT1 with silicon controlled rectifier TYN, the AC power supply to the AC motor for forward and reverse rotation control can be quickly cut off when the device malfunctions, thereby improving the safety of AC motor operation.

[0080] Reference Figures 1 to 3 In some embodiments of this utility model, the first control module 500 includes: an RC series circuit, a fourth relay K4, a parallel current-limiting resistor group 520, and a fifth drive circuit 510.

[0081] The input terminal of the fifth drive circuit 510 is connected to the output terminal of the control module 100, and the output terminal of the fifth drive circuit 510 is connected to the drive terminal of the fourth relay K4, that is, the output terminal of the fifth drive circuit 510 is connected to the first pin and the second pin of the fourth relay K4.

[0082] The tenth resistor R10 and the first capacitor C1 form an RC series circuit. One end of the RC series circuit is connected to the AC high potential terminal ACL, and the other end of the RC series circuit is connected to one end of the switch of the fourth relay K4.

[0083] One end of the main coil L1 is connected to one end of the switch of the fourth relay K4, and the other end of the switch of the fourth relay K4 is connected to the AC high potential terminal ACL. The other end of the main coil L1 is connected to one end of the parallel current limiting resistor group 520, and the other end of the parallel current limiting resistor group 520 is connected to the AC low potential terminal ACN.

[0084] Among them, the parallel current-limiting resistor group 520 is composed of the eleventh resistor R11 and the twelfth resistor R12 connected in parallel.

[0085] In one embodiment, the control module 100 outputs a first control signal, and the fifth drive circuit 510 controls the fourth relay K4 to close according to the first control signal, thereby connecting the main coil L1 and the AC high potential terminal ACL, and causing the main coil L1 to close.

[0086] Reference Figure 1 In some embodiments of this utility model, the control device further includes: a photosensitive detection module, a zero-crossing detection module 600, and a current detection module 700.

[0087] The input terminal of the zero-crossing detection module 600 is connected to the AC high-potential terminal ACL, and the output terminal of the zero-crossing detection module 600 is connected to the input terminal of the control module 100. The zero-crossing detection module 600 is used to detect the zero-crossing point of the AC signal and output the zero-crossing signal to the control module 100.

[0088] In one embodiment, the zero-crossing detection module 600 detects the zero-crossing point and outputs a zero-crossing signal to the control module 100. The control module 100 outputs a second control signal based on the zero-crossing signal to control the switching contacts of the first relay K1 and the second relay K2, thereby changing the current flow direction and adjusting the direction of the AC motor.

[0089] The input terminal of the current detection module 700 is connected to the AC low potential terminal ACN. The input terminal of the current detection module 700 is also connected to the other end of the main coil L1. The output terminal of the current detection module 700 is connected to the control module 100. The current detection module 700 is used to detect the operating current of the main coil L1 and output a current signal to the control module 100.

[0090] In one embodiment, the current detection module 700 detects the operating current of the main coil L1 and outputs a current signal to the control module 100. When the control module 100 determines that the main coil L1 has a fault based on the current signal, it outputs a cutoff signal to the third relay K3 and / or the thyristor TYN to cut off the AC signal power supply to the first relay K1 and the second relay K2.

[0091] The output of the photosensitive detection module is connected to the input of the control module 100. The photosensitive detection module is used to detect kitchen waste entering the housing and outputs a start signal to the control module 100.

[0092] In one embodiment, the photosensitive detection module detects kitchen waste entering the housing and outputs a start signal to the control module 100. The control module 100 outputs a first control signal to the first control module 500 and a second control signal to the second control module 200 based on the start signal, so as to start the AC motor to crush the kitchen waste.

[0093] In another embodiment of the present invention, a food waste disposer includes a control device for the forward and reverse rotation of an AC motor, as described in another embodiment of the present invention.

[0094] Reference Figure 1 Since food waste disposers are usually installed under the kitchen sink and have a high chance of contact with water, combining the drive switch module 300 and the thyristor module 400 at the low potential end can achieve electrical isolation, reduce the risk of electric shock, and improve the safety of using the food waste disposer.

[0095] Compared with the existing technology that sets the drive switch module 300 and the thyristor module 400 at the high potential, the low potential end has a lower voltage, which makes it easier to install or maintain the food waste disposer, making the operation more convenient and safer.

[0096] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A control device for forward and reverse rotation of an AC motor, characterized in that, include: AC high potential terminal, AC low potential terminal, drive switch module, thyristor module, control module, first control module and second control module; The output terminal of the first control module is connected to the main coil of the AC motor, and the input terminal of the first control module is connected to the control module. The AC high-potential terminal is connected to the main coil through the first control module, and the AC low-potential terminal is connected to the main coil. The output terminal of the second control module is connected to the starting coil of the AC motor, and the input terminal of the second control module is connected to the control module. The AC high-potential terminal is connected to the power supply terminal of the second control module, and the AC low-potential terminal is connected to the second control module through the drive switch module and the thyristor module respectively. The output terminal of the drive switch module is connected to the second regulation module and the AC low potential terminal, respectively, and the input terminal of the drive switch module is connected to the control module. The output terminal of the thyristor module is connected to the second regulation module and the AC low potential terminal, respectively, and the input terminal of the thyristor module is connected to the control module.

2. The AC motor forward and reverse rotation control device according to claim 1, characterized in that, The device further includes: a buffer capacitor; One end of the buffer capacitor is connected to the AC high potential terminal, and the other end of the buffer capacitor is connected to the power supply terminal of the second control module.

3. The AC motor forward and reverse rotation control device according to claim 2, characterized in that, The second control module includes: a first relay, a second relay, a first drive circuit, and a second drive circuit; The input terminal of the first driving circuit is connected to the output terminal of the control module, and the output terminal of the first driving circuit is connected to the driving terminal of the first relay. The input terminal of the second driving circuit is connected to the output terminal of the control module, and the output terminal of the second driving circuit is connected to the driving terminal of the second relay. The common terminal of the first relay and the common terminal of the second relay are both connected to the starting coil; the first contact of the first relay and the first contact of the second relay are both connected to the other end of the buffer capacitor. The second contact of the first relay is connected to the AC low-potential terminal through the drive switch module and the thyristor module; The second contact of the second relay is connected to the AC low potential terminal through the drive switch module and the thyristor module.

4. The AC motor forward and reverse rotation control device according to claim 3, characterized in that, The drive switch module includes: a third relay and a third drive circuit; The input terminal of the third driving circuit is connected to the output terminal of the control module, and the output terminal of the third driving circuit is connected to the driving terminal of the third relay. The common terminal of the third relay is connected to the second contact of the first relay and the second contact of the second relay, respectively, and the contact of the third relay is connected to the AC low potential terminal.

5. The AC motor forward and reverse rotation control device according to claim 3, characterized in that, The thyristor module includes: a thyristor and a fourth driving circuit; The input terminal of the fourth driving circuit is connected to the output terminal of the control module, and the output terminal of the fourth driving circuit is connected to the driving terminal of the thyristor. The anode of the thyristor is connected to the second contact of the first relay and the second contact of the second relay, respectively, and the cathode of the thyristor is connected to the AC low potential terminal.

6. The control device for forward and reverse rotation of an AC motor according to claim 1, characterized in that, The first control module includes: a fourth relay, a fifth drive circuit, and a parallel current-limiting resistor group; The input terminal of the fifth driving circuit is connected to the output terminal of the control module, and the output terminal of the fifth driving circuit is connected to the driving terminal of the fourth relay. One end of the main coil is connected to the AC high potential terminal through the fourth relay, and the other end of the main coil is connected to the AC low potential terminal through the parallel current-limiting resistor group.

7. The control device for forward and reverse rotation of an AC motor according to claim 1, characterized in that, The device further includes: a zero-crossing detection module; The input terminal of the zero-crossing detection module is connected to the AC high-potential terminal, and the output terminal of the zero-crossing detection module is connected to the input terminal of the control module. The zero-crossing detection module is used to detect the zero-crossing point of the AC signal output from the AC high-potential terminal.

8. The control device for forward and reverse rotation of an AC motor according to claim 1, characterized in that, The device includes: a current detection module; The input terminal of the current detection module is connected to the AC low potential terminal and the other end of the main coil, respectively. The output terminal of the current detection module is connected to the input terminal of the control module. The current detection module is used to detect the operating current of the main coil.

9. The AC motor forward and reverse rotation control device according to claim 5, characterized in that, The thyristor module also includes: a thermistor; One end of the thermistor is connected to the second contact of the first relay and the second contact of the second relay, respectively, and the other end of the thermistor is connected to the anode of the thyristor.

10. A food waste disposer, characterized in that, The control device for forward and reverse rotation of an AC motor as described in any one of claims 1 to 9.

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