Controller

Abstract

The utility model provides a controller, relates to the technical field of low-voltage electric appliances, and is used for reducing potential safety hazards caused by static electricity and reducing the possibility of high use cost. The controller comprises a shell, a circuit board, and a power supply module, a control module, a voltage acquisition module, a driving module and a display module which are arranged on the circuit board. The power supply module is used for receiving alternating current provided by an external power supply and converting the alternating current into direct current. The voltage acquisition module is used for acquiring an external power supply voltage value and generating a voltage value signal based on the voltage value. The control module is used for receiving the voltage value signal. The driving module is used for driving and controlling connection and disconnection of an external power supply; and the control module judges whether to control the driving module to act according to the voltage value signal. The display module is used for displaying the state of the external power supply. An observation hole is formed in the position, close to the display module, of the shell. A first windowing area is arranged on the circuit board close to the observation hole, and the first windowing area is electrically connected with a zero line of an external power supply.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a controller. BACKGROUND

[0002] With the development of science and technology, the integration of electronic products is getting higher and higher, and customers' requirements for products are also increasing. In the use process of the controller, static interference phenomenon will inevitably occur.

[0003] The instantaneous energy of static electricity can be large, and there is no fixed path when the energy is released.

[0004] When static electricity occurs, it can enter the controller through the gap on the shell included in the controller and hit the circuit board of the controller, causing damage to the controller. As a result, not only is there a safety hazard, but also the use cost is increased. CONTENT OF THE INVENTION

[0005] The present application provides a controller for reducing the possibility of safety hazards and high use costs caused by static electricity.

[0006] In order to achieve the above-mentioned purpose, the present application provides a controller, which comprises a shell, a circuit board and a power module, a control module, a voltage acquisition module, a driving module and a display module arranged on the circuit board, the circuit board being arranged in the shell. The power module is electrically connected with an external power supply for receiving alternating current provided by the external power supply and converting the alternating current into direct current. The control module, the driving module and the display module are all electrically connected with the output end of the power module, and the power module is used for providing direct current for the control module, the driving module and the display module. The voltage acquisition module is electrically connected with the external power supply for acquiring the voltage value of the external power supply and generating a voltage value signal based on the voltage value. The control module is electrically connected with the voltage acquisition module for receiving the voltage value signal. The driving module is used for driving the connection and disconnection of the external power supply, and the driving module is electrically connected with the control module, and the control module judges whether to control the driving module to act according to the voltage value signal. The display module is electrically connected with the control module for displaying the state of the external power supply. An observation hole is formed on the shell near the display module. A first windowed area is arranged on the circuit board near the observation hole, and the first windowed area is electrically connected with the zero line of the external power supply.

[0007] When the above technical solution is adopted, static electricity entering the shell through the observation hole can directly flow into the first windowed area and further be introduced into the zero line, that is, the energy of static electricity is directly introduced into the zero line, avoiding damage to the circuit board and the modules arranged in the shell caused by static electricity, which can reduce the possibility of safety hazards and high use costs caused by static electricity.

[0008] In a possible implementation, along the length extension direction of the first windowing region, the size of the first windowing region is greater than the size of the observation hole. In the direction perpendicular to the length extension direction of the first windowing region, the size of the first windowing region is greater than or equal to 1 mm.

[0009] When the above technical solution is adopted, the influence of static electricity on the circuit board is reduced as much as possible, and it can be ensured that static electricity entering the shell interior through the observation hole flows into the first windowing region and is further introduced to the zero line.

[0010] In a possible implementation, the controller further includes a mode selection module arranged on the circuit board, and the mode selection module includes a control handle. The control handle has an automatic position and a manual position relative to the shell. When the control handle is in the automatic position, the controller is in an automatic mode, and the controller is configured to control the on and off of the external power supply. When the control handle is in the manual position, the controller is in a manual mode, and the controller is configured to control the off of the external power supply.

[0011] When the above technical solution is adopted, the operator can select the manual mode or the automatic mode of the controller according to different working environments or actual needs of the controller, thereby expanding the application range of the controller.

[0012] In a possible implementation, the shell is provided with a relief hole, and one end of the control handle extends out of the shell through the relief hole.

[0013] When the above technical solution is adopted, the operator can directly contact the control handle outside the shell, so as to operate the control handle and switch the control handle between the automatic position and the manual position.

[0014] In a possible implementation, a second windowing region is arranged on the circuit board at a position close to the relief hole, and the second windowing region is electrically connected to the zero line.

[0015] When the above technical solution is adopted, static electricity entering the shell interior through the relief hole can directly flow into the second windowing region and be further introduced to the zero line, that is, the energy of the static electricity is directly introduced to the zero line, thereby avoiding damage of the static electricity to the circuit board and the modules arranged in the shell, and reducing the possibility of safety hazards and high use cost caused by the static electricity.

[0016] In a possible implementation, along the length extension direction of the second windowing region, the size of the second windowing region is greater than the size of the relief hole. In the direction perpendicular to the length extension direction of the second windowing region, the size of the second windowing region is greater than or equal to 1 mm.

[0017] When adopting the above technical solution, the impact of static electricity on the circuit board is minimized. This ensures that static electricity entering the housing through the clearance hole flows into the second window area and is further introduced onto the neutral line.

[0018] In one possible implementation, the power module includes a first thermistor, a second thermistor, a third thermistor, a first varistor, a second varistor, a third varistor, a first diode, a second diode, and a third diode. One end of the first thermistor is electrically connected to phase A of the external power supply. The other end of the first thermistor is electrically connected to one end of the first varistor, and the other end of the first varistor is electrically connected to the neutral line. The other end of the first thermistor is also electrically connected to the anode of the first diode. One end of the second thermistor is electrically connected to phase B of the external power supply. The other end of the second thermistor is electrically connected to one end of the second varistor, and the other end of the second varistor is electrically connected to the neutral line. The other end of the second thermistor is also electrically connected to the anode of the second diode, and the cathode of the second diode is electrically connected to the cathode of the first diode. One end of the third thermistor is electrically connected to phase C of the external power supply. The other end of the third thermistor is electrically connected to one end of the third varistor, and the other end of the third varistor is electrically connected to the neutral line. The other end of the third thermistor is also electrically connected to the anode of the third diode, and the cathode of the third diode is electrically connected to the cathode of the first diode.

[0019] In one possible implementation, the power module further includes an electrolytic capacitor, the anode of which is electrically connected to the cathode of the first diode, and the cathode of which is electrically connected to the neutral wire.

[0020] When the above technical solution is adopted, the ripple and noise in the DC current output by the power module can be reduced, so that the power module outputs a smoother DC current.

[0021] In one possible implementation, the voltage acquisition module includes a fourth diode, a first resistor, a second resistor, and a first capacitor. The anode of the fourth diode is electrically connected to phase A of the external power supply; the cathode of the fourth diode is electrically connected to one end of the first resistor; the other end of the first resistor is electrically connected to one end of the second resistor; the other end of the second resistor is grounded; and the first capacitor is connected in parallel with the second resistor.

[0022] When the above technical solution is adopted, the AC current from the external power supply is rectified into DC by the fourth diode, and then divided by the first and second resistors to convert the high voltage into a low voltage. The first capacitor can filter and rectify the current flowing through the second resistor, ensuring the smoothness of the current output from the voltage acquisition module.

[0023] In one possible implementation, the voltage acquisition module also includes a Zener diode connected in parallel with the first capacitor, and the anode of the Zener diode is grounded.

[0024] When the above technical solution is adopted, the setting of the Zener diode can protect the control module and prevent the AC voltage of the external power supply from being too high and damaging the subsequent circuit. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a controller provided in an embodiment of this application.

[0026] Figure 2 A control block diagram of the controller provided in an embodiment of this application.

[0027] Figure 3 This is a partial schematic diagram of the controller provided in an embodiment of this application.

[0028] Figure 4 A circuit diagram of a power module provided in an embodiment of this application.

[0029] Figure 5 This is a circuit diagram of the voltage acquisition module provided in an embodiment of this application.

[0030] Figure 6 This is a circuit diagram of the driving module provided in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Housing, 11-Observation hole, 12-Allowance hole, 2-Circuit board, 21-First window area, 22-Second window area

[0033] 3-Power supply module, 4-Control module, 5-Voltage acquisition module, 6-Drive module, 7-Display module, 8-Mode selection module. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0036] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0037] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0039] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0040] Please refer to Figure 1 and Figure 2 As shown, this application provides a controller, which includes a housing 1, a circuit board 2, and a power module 3, a control module 4, a voltage acquisition module 5, a drive module 6, and a display module 7 disposed on the circuit board 2. The circuit board 2 is disposed inside the housing 1.

[0041] Specifically, the circuit board 2 is fixedly installed inside the cavity of the housing 1. It can be understood that, because the circuit board 2 is located inside the housing 1, the power module 3, control module 4, voltage acquisition module 5, drive module 6, and display module 7 installed on the circuit board 2 can all be located inside the housing 1.

[0042] The housing 1 can accommodate and enclose the power module 3, control module 4, voltage acquisition module 5, drive module 6, and display module 7, providing a stable space for these modules and ensuring their normal operation without external interference. Simultaneously, the housing 1 provides positioning and support for the power module 3, control module 4, voltage acquisition module 5, drive module 6, and display module 7, preventing displacement or damage during operation. The housing 1 can also withstand a certain amount of external pressure, protecting the internal modules from damage. Furthermore, the housing 1 provides protection, preventing moisture, dust, dirt, and other impurities from entering the housing 1, thus avoiding corrosion or damage to the modules installed inside.

[0043] In practice, the shell 1 can be made of plastic, but it is not limited to this and the actual situation shall prevail.

[0044] In practice, power module 3 is electrically connected to an external power source to receive AC current supplied by the external power source and convert the AC current into DC current.

[0045] The external power supply can be 230V three-phase electricity. In a three-phase power system, there are usually three live wires (phase wires) and one neutral wire. The voltage between the live wires is the line voltage, and the voltage between the live wire and the neutral wire is the phase voltage.

[0046] After receiving the AC current supplied by the external power supply, the power module 3 can filter and rectify the AC current to convert it into DC current.

[0047] The control module 4, drive module 6 and display module 7 are all electrically connected to the output terminal of the power module 3. The power module 3 is used to provide DC current to the control module 4, drive module 6 and display module 7.

[0048] The DC voltage output by power module 3 is not specifically limited here, but is based on the actual voltage required by power module 3, control module 4, voltage acquisition module 5, drive module 6 and display module 7.

[0049] In the embodiments provided in this application, the DC voltage output by the power module 3 includes 12V and 3.3V, but of course, it is not limited to these values.

[0050] The voltage acquisition module 5 is electrically connected to an external power supply and is used to acquire the voltage value of the external power supply and generate a voltage signal based on the voltage value. The voltage acquisition module 5 can obtain the voltage value of the external power supply to detect the status of the external power supply in real time.

[0051] like Figure 2As shown, control module 4 is electrically connected to voltage acquisition module 5 and is used to receive voltage value signals. Drive module 6 is used to drive and control the connection and disconnection of the external power supply. Drive module 6 is electrically connected to control module 4, and control module 4 determines whether to control drive module 6 to operate based on the voltage value signal.

[0052] Specifically, a preset voltage value range can be pre-stored in the control module 4. After the control module 4 receives the voltage value signal transmitted by the voltage acquisition module 5, the control module 4 can compare the received voltage value with the preset voltage value range stored in the control module 4.

[0053] When the voltage value received by the control module 4 is within the preset voltage range, it indicates that the external power supply is normal and can provide the required rated operating voltage to the load.

[0054] When the voltage value received by the control module 4 is greater than the preset voltage range, indicating that the voltage provided by the external power supply exceeds the normal operating voltage range of the load, i.e., an overvoltage phenomenon occurs, the control module 4 controls the drive module 6 to operate, causing the drive module 6 to drive and control the external power supply to disconnect.

[0055] When the voltage value received by the control module 4 is less than the preset voltage range, indicating that the voltage provided by the external power supply is lower than the rated voltage of the load, i.e., an undervoltage phenomenon occurs, the control module 4 controls the drive module 6 to operate, causing the drive module 6 to drive and control the external power supply to disconnect.

[0056] In addition, when the voltage received by the control module 4 is zero, that is, when a voltage loss occurs, the control module 4 will control the drive module 6 to operate, causing the drive module 6 to drive the external power supply to disconnect.

[0057] After the control module 4 controls the drive module 6 to disconnect the external power supply, and after investigating the cause of the abnormal phenomenon, the control module 4 can control the drive module 6 to connect the external power supply and provide normal power to the load.

[0058] Meanwhile, the display module 7 is electrically connected to the control module 4 and is used to display the status of the external power supply.

[0059] In practice, the display module 7 may include indicator lights. In specific implementations, the indicator lights can be controlled to display different colors, such as red, green, and yellow, or the indicator lights can be controlled to flash, such as fast flashing, slow flashing, or flashing at a fixed time, to correspond to different working states of the external power supply.

[0060] The correspondence between the display mode of display module 7 and the status of external power supply is not specifically limited here, and shall be subject to the actual situation.

[0061] Combination Figure 1 and Figure 3 As shown, an observation hole 11 is provided on the housing 1 near the display module 7. This allows the operator to observe the display content of the display module 7 and obtain the status of the external power supply.

[0062] In practice, part of the display module 7 can extend out of the housing 1 through the observation hole 11. Of course, the display module 7 can also be completely housed inside the housing 1.

[0063] In practice, because the electrical clearance between the observation hole 11 and the circuit board 2 is small, when static electricity occurs, the static electricity will travel along the observation hole 11 and the electrical clearance to the circuit board 2, which may damage the entire controller.

[0064] Therefore, in the embodiments provided in this application, please refer to... Figure 1 and Figure 3 As shown, near the observation hole 11, the circuit board 2 has a first window area 21, which is connected to the neutral wire of the external power supply.

[0065] In this way, static electricity entering the housing 1 through the observation hole 11 can be directly induced to flow into the first window area 21 and further introduced to the neutral line. That is, the energy of static electricity is directly introduced to the neutral line, avoiding damage to the circuit board 2 and the modules installed in the housing 1 caused by static electricity. This can reduce the safety hazards caused by static electricity and the possibility of high operating costs.

[0066] The setting of the first window area 21 is relatively simple to operate. It not only meets the design standards of the controller itself, but also protects the circuit board 2 from static electricity when the static energy is large.

[0067] In one possible implementation, the size of the first window region 21 is larger than the size of the observation hole 11 along its length. In a direction perpendicular to the length of the first window region 21, the size of the first window region 21 is greater than or equal to 1 mm.

[0068] In the embodiments provided in this application, the observation hole 11 can be rectangular, but of course, it is not limited to this.

[0069] It should be noted that electrostatic energy has no fixed path when released. To minimize the impact of static electricity on circuit board 2, the size of the first window area 21 must be within the specified range. This ensures that static electricity entering the housing 1 through the observation hole 11 flows into the first window area 21 and is further introduced onto the neutral line.

[0070] In specific implementation, along the length extension direction of the first window area 21, the size of the first window area 21 is determined according to the size of the observation hole 11 in the length extension direction of the first window area 21, and no specific limitation is made here.

[0071] For example, in a direction perpendicular to the length extension direction of the first window area 21, the size of the first window area 21 can be 1mm, 1.2mm, 1.3mm, 1.5mm, 2mm, etc. Of course, it is not limited to this in practice, and the actual situation shall prevail.

[0072] It should be noted that the direction perpendicular to the length extension direction of the first window area 21 can be the width direction of the first window area 21.

[0073] The length and width of the first window area 21 are not specifically limited here, but are subject to the actual situation.

[0074] In some embodiments, such as Figure 2 As shown, the controller also includes a mode selection module 8 mounted on the circuit board 2. The mode selection module 8 includes a control handle, which has an automatic position and a manual position relative to the housing 1. When the control handle is in the automatic position, the controller is in automatic mode, and the controller is used to control the connection and disconnection of the external power supply. When the control handle is in the manual position, the controller is in manual mode, and the controller is used to control the disconnection of the external power supply.

[0075] In practice, the mode selection module 8 may include a main body and a control handle rotatably mounted on the main body. The main body may be fixedly mounted on the circuit board 2.

[0076] When the control handle rotates relative to the body, the control handle has an automatic position and a manual position relative to the housing 1.

[0077] In practice, the controller can be switched to manual or automatic position by manipulating the control handle, depending on the actual needs.

[0078] This allows operators to select manual or automatic mode for the controller based on different working environments or actual needs, thus expanding the controller's applicability.

[0079] When the control handle is rotated to the automatic position, the controller is in automatic mode and can control the connection and disconnection of the external power supply.

[0080] Specifically, when the controller is in automatic mode, if the voltage value received by the control module 4 is not within the preset voltage range, it indicates an abnormality in the external power supply. At this time, the controller can disconnect the external power supply. In practice, the control module 4 controls the drive module 6 to disconnect the external power supply.

[0081] After the cause of the abnormal phenomenon is investigated, the control module 4 can control the drive module 6 to operate, so that the drive module 6 drives the external power supply to be connected and provides normal power to the load.

[0082] When the control handle is rotated to the manual position, the controller is in manual mode, and the controller can control the disconnection of the external power supply.

[0083] Specifically, when the controller is in manual mode, if the voltage value received by the control module 4 is not within the preset voltage range, it indicates an abnormality in the external power supply. At this time, the controller can disconnect the external power supply. In practice, the control module 4 controls the drive module 6 to disconnect the external power supply.

[0084] After the cause of the abnormal phenomenon has been identified, the operator can control the external power supply to be turned on.

[0085] The mode selection module 8 can be a DIP switch, but it is not limited to this in practice.

[0086] As an optional approach, such as Figure 1 As shown, the housing 1 is provided with a clearance hole 12, and one end of the control handle extends out of the housing 1 through the clearance hole 12.

[0087] This allows the operator to directly access the control handle outside the housing 1, enabling them to operate the control handle and switch it between automatic and manual positions.

[0088] In practice, the dimensions of the clearance hole 12 are not specifically limited here, but shall be determined according to the actual situation.

[0089] Furthermore, near the clearance hole 12, the circuit board 2 is provided with a second window area 22, which is connected to the neutral wire.

[0090] In this case, the static electricity entering the housing 1 through the clearance hole 12 can be directly induced to flow into the second window area 22 and further introduced to the neutral line. That is, the energy of the static electricity is directly introduced to the neutral line, avoiding damage to the circuit board 2 and the module installed in the housing 1 caused by static electricity. This can reduce the safety hazards caused by static electricity and the possibility of high operating costs.

[0091] The setting of the second window area 22 is relatively simple to operate. It not only meets the design standards of the controller itself, but also protects the circuit board 2 from static electricity when the static energy is large.

[0092] As an example, along the length of the second window region 22, the size of the second window region 22 is larger than the size of the clearance hole 12. In a direction perpendicular to the length of the second window region 22, the size of the second window region 22 is greater than or equal to 1 mm.

[0093] In the embodiments provided in this application, the clearance hole 12 can be rectangular, but of course, it is not limited to this.

[0094] It should be noted that electrostatic energy has no fixed path when released. To minimize the impact of static electricity on circuit board 2, the size of the second window area 22 must be within the specified range. This ensures that static electricity entering the housing 1 through the clearance hole 12 flows into the second window area 22 and is further introduced to the neutral line.

[0095] In specific implementation, along the length extension direction of the second window area 22, the size of the second window area 22 is determined according to the size of the clearance hole 12 in the length extension direction of the second window area 22, and is not specifically limited here.

[0096] For example, in a direction perpendicular to the length extension direction of the second window area 22, the size of the second window area 22 can be 1mm, 1.1mm, 1.4mm, 1.5mm, 2mm, etc. Of course, it is not limited to this in practice, and the actual situation shall prevail.

[0097] In practice, the direction perpendicular to the length extension direction of the second window area 22 can be the width direction of the second window area 22.

[0098] The length and width of the second window area 22 are not specifically limited here, but shall be determined according to the actual situation.

[0099] It should be noted that the first window area 21 may not be connected to the second window area 22, or they may be connected.

[0100] As an optional approach, such as Figure 4 As shown, the power module 3 includes a first thermistor RT1, a second thermistor RT2, a third thermistor RT3, a first varistor RV1, a second varistor RV2, a third varistor RV3, a first diode VD1, a second diode VD2, and a third diode VD3.

[0101] Please continue reading. Figure 4As shown, one end of the first thermistor RT1 is electrically connected to phase A of the external power supply. The other end of the first thermistor RT1 is electrically connected to one end of the first varistor RV1, the other end of the first varistor RV1 is electrically connected to the neutral line, and the other end of the first thermistor RT1 is also electrically connected to the anode of the first diode VD1.

[0102] One end of the second thermistor RT2 is electrically connected to the B-phase line of the external power supply, and the other end of the second thermistor RT2 is electrically connected to one end of the second varistor RV2. The other end of the second varistor RV2 is electrically connected to the neutral line. The other end of the second thermistor RT2 is also electrically connected to the anode of the second diode VD2, and the cathode of the second diode VD2 is electrically connected to the cathode of the first diode VD1.

[0103] One end of the third thermistor RT3 is electrically connected to the C-phase line of the external power supply. The other end of the third thermistor RT3 is electrically connected to one end of the third varistor RV3, and the other end of the third varistor RV3 is electrically connected to the neutral line. The other end of the third thermistor RT3 is also electrically connected to the anode of the third diode VD3, and the cathode of the third diode VD3 is electrically connected to the cathode of the first diode VD1.

[0104] The cathodes of the first diode VD1, the second diode VD2, and the third diode VD3 form the first connection point.

[0105] Power module 3 is electrically connected to an external power source. The AC current entering power module 3 is rectified into pulsating DC by the first diode VD1, the second diode VD2 and the third diode VD3.

[0106] Furthermore, such as Figure 4 As shown, the power module 3 also includes an electrolytic capacitor C1, the anode of which is electrically connected to the cathode of the first diode VD1. Specifically, the anode of the electrolytic capacitor C1 is connected to the first connection point, and the cathode of the electrolytic capacitor C1 is electrically connected to the neutral wire.

[0107] In this way, the ripple and noise in the DC current output by power module 3 can be reduced, resulting in a smoother DC current output by power module 3.

[0108] Meanwhile, as an energy storage capacitor, the electrolytic capacitor C1, although its overall capacity may decrease at low temperatures (such as -40°C), is still sufficient to cut off the external power supply in time in the event of a complete power failure of the controller, thus protecting the circuit.

[0109] In practice, the electrolytic capacitor C1 can be an aluminum electrolytic capacitor, but it is not limited to this.

[0110] The settings of the first thermistor RT1, the second thermistor RT2, the third thermistor RT3, the first varistor RV1, the second varistor RV2, and the third varistor RV3 can clamp the AC voltage provided by the external power supply to a certain voltage value, so as to avoid damage to the control module 4, the drive module 6, and the display module 7 which are electrically connected to the power supply module 3.

[0111] For example, in actual wiring, if the phase voltage AC230V is mistakenly connected as the line voltage AC400V, the AC400V will be rectified into a DC voltage of 565V by the first diode VD1, the second diode VD2 and the third diode VD3. The withstand voltage of the electrolytic capacitor C1 is generally less than this voltage.

[0112] Assume the electrolytic capacitor C1 has a withstand voltage of 400V. When the voltage after rectification by diodes VD1, VD2, and VD3 exceeds 400V, varistor RV1, RV2, and RV3 will conduct. At this time, the current flowing through thermistors RT1, RT2, and RT3 will increase, thus increasing the resistance of thermistors RT1, RT2, and RT3. This increases the voltage drop across these thermistors, causing the voltage across varistor RV1, RV2, and RV3 to gradually decrease.

[0113] In this way, a dynamic balance is achieved, that is, the voltage exceeding 400V is ultimately dissipated as heat across the first thermistor RT1, the second thermistor RT2, and the third thermistor RT3, ensuring that the voltage across the electrolytic capacitor C1 is less than its withstand voltage value.

[0114] The power module 3 provided in this application embodiment can still operate normally even when the wiring is incorrect (i.e., the phase voltage is connected as the line voltage). Meanwhile, the first thermistor RT1, the second thermistor RT2, and the third thermistor RT3 not only limit high voltage but also limit surge voltage, mitigating the high voltage impact on the subsequent first varistor RV1, second varistor RV2, third varistor RV3, and other circuits.

[0115] As one possible approach, refer to Figure 5The voltage acquisition module 5 includes a fourth diode VD8, a first resistor R12, a second resistor R16, and a first capacitor C14. The anode of the fourth diode VD8 is electrically connected to phase A of the external power supply, the cathode of the fourth diode VD8 is electrically connected to one end of the first resistor R12, the other end of the first resistor R12 is electrically connected to one end of the second resistor R16, the other end of the second resistor R16 is grounded, and the first capacitor C14 is connected in parallel with the second resistor R16.

[0116] Thus, the AC current from the external power supply is rectified into DC by the fourth diode VD8, and then divided by the first resistor R12 and the second resistor R16 to convert the high voltage to a low voltage. The first capacitor C14 filters and rectifies the current flowing through the second resistor R16, ensuring the smoothness of the current output from the voltage acquisition module 5.

[0117] In practice, the resistance values ​​of the first resistor R12, the second resistor R16, and the withstand voltage value of the first capacitor C14 are not specifically limited here, and should be based on the actual situation.

[0118] In addition, such as Figure 5 As shown, the voltage acquisition module 5 provided in this application embodiment further includes a third resistor R13 and a fourth resistor R14, wherein one end of the third resistor R13 is electrically connected to the other end of the first resistor R12, the other end of the third resistor R13 is electrically connected to one end of the fourth resistor R14, and the other end of the fourth resistor R14 is electrically connected to one end of the second resistor R16.

[0119] The third resistor R13 and the fourth resistor R14 have a voltage reduction function, converting the high voltage provided by the external power supply into a low voltage.

[0120] As an example, such as Figure 5 As shown, the voltage acquisition module 5 provided in this embodiment of the application also includes a Zener diode VD9, which is connected in parallel with the first capacitor C14, and the anode of the Zener diode VD9 is grounded.

[0121] The Zener diode VD9 is installed to protect the control module 4 and prevent damage to the subsequent circuitry when the AC voltage of the external power supply is too high.

[0122] In one possible implementation, such as Figure 6 As shown, the drive module 6 provided in this embodiment includes a motor drive unit U5, a motor J1, a second capacitor C28, and a pull-up resistor R38.

[0123] One end of the pull-up resistor R38 is electrically connected to the output terminal of the power module 3, and the power module 3 provides a DC voltage to the pull-up resistor R38. Specifically, the power module 3 can provide a 3.3V DC voltage to the pull-up resistor R38.

[0124] The other end of the pull-up resistor R38 is electrically connected to the first pin of the motor drive unit U5. The other end of the pull-up resistor U5 is also electrically connected to one end of the second capacitor C28, and the other end of the second capacitor C28 is grounded.

[0125] The eighth pin of the motor drive unit U5 is electrically connected to the output terminal of the power supply module 3 to receive DC voltage. Specifically, the power supply module 3 can provide a 12V DC voltage to the motor drive unit U5.

[0126] The second and third pins of the motor drive unit U5 are electrically connected to the output of the control module 4 to receive action signals.

[0127] The sixth and seventh pins of the motor drive unit U5 are both electrically connected to the motor J1, and the fifth pin of the motor drive unit U5 is grounded.

[0128] The drive module 6 also includes a third capacitor C31 and a third resistor R37. The two ends of the third capacitor C31 are electrically connected to the sixth and seventh pins of the motor drive unit U5, respectively. C31 is used to filter and rectify the current flowing through the motor J1 to ensure the smoothness of the current flowing into the motor J1.

[0129] One end of the third resistor R37 is electrically connected to the fourth pin of the motor drive unit U5, and the other end of the third resistor R37 is grounded. The third resistor R37 is used to limit the maximum drive current of the motor drive unit U5.

[0130] When the voltage acquired by the voltage acquisition module 5 is abnormal, the control module 4 controls the motor drive unit U5 to drive the motor J1 to the open position, disconnecting the current of the external power supply.

[0131] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A controller characterized by comprising: The controller comprises a shell, a circuit board, and a power module, a control module, a voltage acquisition module, a driving module and a display module arranged on the circuit board; the circuit board is arranged in the shell; The power module is electrically connected with an external power supply, used for receiving alternating current provided by the external power supply and converting the alternating current into direct current; the control module, the driving module and the display module are electrically connected with an output end of the power module, and the power module is used for providing the direct current for the control module, the driving module and the display module; The voltage acquisition module is electrically connected with the external power supply, used for acquiring a voltage value of the external power supply and generating a voltage value signal based on the voltage value; the control module is electrically connected with the voltage acquisition module, used for receiving the voltage value signal; The driving module is used for driving to control the connection and disconnection of the external power supply; the driving module is electrically connected with the control module, and the control module judges whether to control the driving module to act according to the voltage value signal; The display module is electrically connected with the control module, used for displaying the state of the external power supply; an observation hole is arranged on the shell near the display module; a first windowed area is arranged on the circuit board near the observation hole; the first windowed area is electrically connected with a zero line of the external power supply.

2. The controller of claim 1, wherein, The size of the first windowed area is greater than the size of the observation hole along the length extension direction of the first windowed area; the size of the first windowed area is greater than or equal to 1mm in the direction perpendicular to the length extension direction of the first windowed area.

3. The controller of claim 1, wherein, The controller further comprises a mode selection module arranged on the circuit board; the mode selection module comprises a control handle, the control handle has an automatic position and a manual position relative to the shell; when the control handle is in the automatic position, the controller is in an automatic mode, and the controller is used for controlling the connection and disconnection of the external power supply; when the control handle is in the manual position, the controller is in a manual mode, and the controller is used for controlling the disconnection of the external power supply.

4. The controller of claim 3, wherein, An avoiding hole is arranged on the shell, and one end of the control handle extends out of the shell through the avoiding hole.

5. The controller of claim 4, wherein, A second windowed area is arranged on the circuit board near the avoiding hole, and the second windowed area is electrically connected with the zero line.

6. The controller of claim 5, wherein, The size of the second windowed area is greater than the size of the avoiding hole along the length extension direction of the second windowed area; the size of the second windowed area is greater than or equal to 1mm in the direction perpendicular to the length extension direction of the second windowed area.

7. The controller of claim 1, wherein, The power module comprises a first thermistor, a second thermistor, a third thermistor, a first pressure-sensitive resistor, a second pressure-sensitive resistor, a third pressure-sensitive resistor, a first diode, a second diode and a third diode; One end of the first thermistor is electrically connected with the A-phase line of the external power supply; the other end of the first thermistor is electrically connected with one end of the first voltage-dependent resistor, and the other end of the first voltage-dependent resistor is electrically connected with the zero line; the other end of the first thermistor is also electrically connected with the anode of the first diode; One end of the second thermistor is electrically connected with the B-phase line of the external power supply; the other end of the second thermistor is electrically connected with one end of the second voltage-dependent resistor, and the other end of the second voltage-dependent resistor is electrically connected with the zero line; the other end of the second thermistor is also electrically connected with the anode of the second diode; the cathode of the second diode is electrically connected with the cathode of the first diode; One end of the third thermistor is electrically connected with the C-phase line of the external power supply; the other end of the third thermistor is electrically connected with one end of the third voltage-dependent resistor, and the other end of the third voltage-dependent resistor is electrically connected with the zero line; the other end of the third thermistor is also electrically connected with the anode of the third diode; the cathode of the third diode is electrically connected with the cathode of the first diode.

8. The controller of claim 7, wherein, The power supply module further comprises an electrolytic capacitor, the anode of the electrolytic capacitor is electrically connected with the cathode of the first diode, and the cathode of the electrolytic capacitor is electrically connected with the zero line.

9. The controller of claim 1, wherein, The voltage acquisition module comprises a fourth diode, a first resistor, a second resistor and a first capacitor; One end of the fourth diode is electrically connected with the A-phase line of the external power supply, the cathode of the fourth diode is electrically connected with one end of the first resistor, the other end of the first resistor is electrically connected with one end of the second resistor, the other end of the second resistor is grounded; the first capacitor is connected in parallel with the second resistor.

10. The controller of claim 9, wherein, The voltage acquisition module further comprises a voltage stabilizing diode, the voltage stabilizing diode is connected in parallel with the first capacitor; the anode of the voltage stabilizing diode is grounded.

Images