Moisture-proof heating circuit for motor, electronic equipment and heating equipment
By designing a heating circuit in a low-voltage motor and using ambient temperature and humidity sensors to automatically control heating, combined with a parallel circuit status detection unit, the problem of reduced insulation resistance caused by moisture in the motor is solved, achieving moisture protection and improved reliability of the motor during long-term static periods.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA NUCLEAR POWER DESIGN COMPANY
- Filing Date
- 2025-05-07
- Publication Date
- 2026-05-12
AI Technical Summary
When a low-voltage motor is shut down for a long period of time, moisture can reduce its insulation resistance, thus decreasing its availability.
Design a heating circuit including a first heating control module and a second heating control module. The heating is automatically controlled by ambient temperature and humidity sensors. A parallel circuit status detection unit is set up to back up the control path and ensure that the heating circuit can still work stably in the event of a fault.
It effectively prevents the motor from becoming less available due to moisture, improves the reliability and adaptability of the motor during long-term static periods, simplifies maintenance operations, and enhances the motor's moisture-proof effect.
Smart Images
Figure CN224233856U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage motor technology, and in particular to a heating circuit, electronic device, and heating equipment for motor moisture protection. Background Technology
[0002] Motor windings are typically made of enameled wire and other materials. While these offer some insulation, moisture can accumulate on the surface of the wire during long periods of inactivity, reducing their insulating properties. Furthermore, the moisture-proof capabilities of the internal insulation materials also gradually weaken over time. Additionally, the internal cavities and gaps of a motor can easily become breeding grounds for moisture, making it difficult for it to dissipate.
[0003] In related technologies, if a low-voltage motor becomes damp during prolonged periods of inactivity, the insulation resistance inside the motor will decrease, thereby reducing the motor's availability. Therefore, preventing the reduction in motor availability due to moisture has become an urgent technical problem to be solved. Utility Model Content
[0004] The main objective of this application is to provide a heating circuit, electronic device, and heating equipment for preventing moisture damage to motors, thereby preventing a decrease in the availability of motors due to moisture.
[0005] To achieve the above objectives, a first aspect of this application provides a heating circuit for moisture protection of a motor, the heating circuit comprising:
[0006] Power input port, used to connect to an external power source;
[0007] The heating module is connected to the power input port;
[0008] A first heating control module is disposed between the power input port and the heating module. The first heating control module is equipped with an ambient temperature sensing unit. The ambient temperature sensing unit is used to detect the ambient temperature, and the first heating control module is used to control the heating operation status of the heating module according to the ambient temperature.
[0009] A second heating control module is disposed between the power input port and the heating module. The second heating control module is connected in parallel with the first heating control module. The second heating control module is equipped with a circuit status detection unit, which is disposed between the first heating control module and the power input port. The circuit status detection unit is used to detect a first operating state of the first heating control module. The second heating control module is used to control the heating operation state of the heating module according to the first operating state.
[0010] The heating circuit for motor moisture protection provided in this application embodiment has at least the following beneficial effects: By setting a first heating control module and a second heating control module before the heating module, the heating module can be automatically turned on according to the ambient temperature, thus promptly starting heating in high humidity or low temperature environments to prevent the motor from getting damp. Furthermore, by setting a parallel second heating control module, the operating status of the first heating control module can be detected and a backup control path can be established, ensuring that the heating circuit can still maintain stable operation when the first control path fails, thereby effectively enhancing the reliability and adaptability of the heating circuit under long-term shutdown conditions. Overall, the heating circuit solution of this application embodiment can achieve motor moisture protection without increasing operational complexity, thereby improving the availability of the motor during periods of inactivity.
[0011] In some embodiments, the second heating control module includes the circuit status detection unit, the data processing unit, and the bypass current control unit. The bypass current control unit is disposed between the power input port and the heating module, and the bypass current control unit is connected in parallel to the first heating control module.
[0012] The data processing unit is connected to the circuit state detection unit and the bypass current control unit respectively. The circuit state detection unit is used to detect the first operating state of the first heating control module, and the data processing unit is used to control the second operating state of the bypass current control unit according to the first operating state, so as to control the heating operation state of the heating module.
[0013] In some embodiments, the bypass current control unit includes a bypass current control switch, which is configured with a controlled terminal, an input terminal, and an output terminal. The controlled terminal is connected to the data processing unit, the input terminal is connected to the power input port, and the output terminal is used to connect to the heating module.
[0014] The data processing unit generates a switch control signal based on the first operating state and sends the switch control signal to the bypass current control switch through the controlled terminal. The bypass current control switch is used to connect the output terminal to the heating module according to the switch control signal.
[0015] In some embodiments, the second heating control module further includes an ambient humidity sensing unit connected to the data processing unit. The ambient humidity sensing unit is used to detect ambient humidity, and the data processing unit is used to determine a target heating power based on the ambient humidity. The data processing unit is configured with a first communication subunit, and the heating module includes a second communication subunit. The data processing unit is used to send the target heating power to the heating module through the first communication subunit. The heating module is used to receive the target heating power through the second communication subunit and determine the heating operating state based on the target heating power.
[0016] In some embodiments, the heating circuit further includes a display module connected to the data processing unit, the display module being used to display at least one of a first operating state of the first heating control module, a heating operating state of the heating module, and a second operating state of the bypass current control unit.
[0017] In some embodiments, the heating circuit further includes an indicator light connected in parallel to the heating module and the first heating control module.
[0018] In some embodiments, the heating circuit further includes a leakage current protection module disposed between the power input port and the heating module.
[0019] To achieve the above objectives, a second aspect of this application provides an electronic device, which includes the heating circuit described in the first aspect.
[0020] The electronic device provided in this application embodiment has at least the following technical effects: by using the heating circuit described in the first aspect, the heating circuit can still maintain stable operation when the first control path fails, thereby achieving moisture protection for the motor and improving the availability of the motor during the rest period.
[0021] To achieve the above objectives, a third aspect of the present application provides a heating device, the heating device including a junction box assembly and a switch box assembly, the junction box assembly including a heating module and a first heating control module, and the switch box assembly including a power input port and a second heating control module;
[0022] The first heating control module in the junction box assembly is connected in parallel with the second heating control module in the switch box assembly, and the heating module in the junction box assembly is connected to the power input port in the switch box assembly to form the heating circuit as described in the first aspect above.
[0023] The heating device provided in this application embodiment has at least the following technical advantages: a first heating control module is disposed in a junction box assembly, which is adjacent to the heater and is typically installed near the motor. By disposing of the first heating control module and the heating module in the junction box assembly, the temperature control logic can be more closely aligned with the actual heated area, improving temperature control accuracy and response speed. Furthermore, since the junction box assembly is an independent modular structure, if a temperature control switch malfunctions, there is no need to disassemble the main power supply line; simply replacing the corresponding module in the junction box restores normal operation, significantly reducing the frequency of traditional high-workload operations such as disconnection and termination. This structure is particularly suitable for scenarios requiring on-site judgment and rapid intervention, ensuring the controllability of the heater while improving the system's operational convenience and maintainability. Simultaneously, by constituting the heating circuit described in the first aspect, this heating device ensures that the heating circuit can maintain stable operation even when the path formed by the heating module and the first heating control module fails, achieving moisture protection for the motor and thus improving the availability of the motor during periods of inactivity.
[0024] To achieve the above objectives, a fourth aspect of the present application provides another heating device, the heating device including a junction box assembly and a switch box assembly, the junction box assembly including a heating module, and the switch box assembly including a power input port, a first heating control module and a second heating control module;
[0025] The heating module in the junction box assembly is connected to the first heating control module, the second heating control module, and the power input port in the switch box assembly, respectively, to form the heating circuit as described in the first aspect above.
[0026] Another heating device provided in this application embodiment has at least the following technical advantages: the temperature control switch is located in the switch box assembly, i.e., away from the heating module, and is usually installed in the motor control cabinet or power distribution area. This structure further decouples the load and control part of the heating module physically, and all key control logic is concentrated in the switch box, which facilitates unified management and replacement from the upper system or remote control center. When the first heating control module fails, there is no need to go to the motor site for disassembly; the control module can be directly replaced at the power distribution end, further avoiding maintenance obstacles caused by high temperature, high humidity, or confined space at the motor end. In addition, the centralized structure of the switch box also facilitates the integration of other modules such as circuit breakers, bypass switches, and humidity sensors, and has good functional expandability. At the same time, by forming the heating circuit described in the first aspect, this heating device ensures that the heating circuit can still maintain stable operation when the path formed by the heating module and the first heating control module fails, achieving moisture protection for the motor and thus improving the availability of the motor during periods of inactivity. Attached Figure Description
[0027] Figure 1This is an optional schematic diagram of a heating circuit for motor moisture protection provided in an embodiment of this application;
[0028] Figure 2 This is another optional schematic diagram of the heating circuit for motor moisture protection provided in the embodiments of this application;
[0029] Figure 3 This is another optional schematic diagram of the heating circuit for motor moisture protection provided in the embodiments of this application;
[0030] Figure 4 This is another optional schematic diagram of the heating circuit for motor moisture protection provided in the embodiments of this application;
[0031] Figure 5 This is an optional schematic diagram of the heating device provided in an embodiment of this application;
[0032] Figure 6 This is another optional schematic diagram of the heating device provided in the embodiments of this application.
[0033] Reference numerals: Power input port 100; Heating module 200; Second communication subunit 201; First heating control module 300; Second heating control module 400; Circuit status detection unit 410; Data processing unit 420; First communication subunit 421; Bypass current control unit 430; External power supply 500; Display module 600; Indicator light 700; Leakage protection module 800. Detailed Implementation
[0034] 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 not intended to limit the scope of this application.
[0035] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0036] 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 belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0037] Motor windings are typically made of enameled wire and other materials. While these offer some insulation, moisture can accumulate on the surface of the wire during long periods of inactivity, reducing their insulating properties. Furthermore, the moisture-proof capabilities of the internal insulation materials also gradually weaken over time. Additionally, the internal cavities and gaps of a motor can easily become breeding grounds for moisture, making it difficult for it to dissipate.
[0038] In related technologies, if a low-voltage motor becomes damp during prolonged periods of inactivity, the insulation resistance inside the motor will decrease, thereby reducing the motor's availability. Therefore, preventing the reduction in motor availability due to moisture has become an urgent technical problem to be solved.
[0039] Based on this, embodiments of this application provide a heating circuit, electronic device, and heating equipment for preventing moisture damage to motors, aiming to prevent a decrease in the availability of motors due to moisture.
[0040] The heating circuit, electronic device, and heating device for motor moisture protection provided in this application are specifically described through the following embodiments. First, the heating circuit for motor moisture protection is described.
[0041] Please see Figure 1 , Figure 1 This is an optional schematic diagram of a heating circuit for motor moisture protection provided in an embodiment of this application. The heating circuit for motor moisture protection provided in this embodiment includes: a power input port 100, a heating module 200, a first heating control module 300, and a second heating control module 400. Specifically, the power input port 100 is used to connect an external power supply 500. The heating module 200 is connected to the power input port. The first heating control module 300 is disposed between the power input port 100 and the heating module 200, and the first heating control module 300 is equipped with an ambient temperature sensing unit. The ambient temperature sensing unit is used to detect the ambient temperature, and the first heating control module 300 is used to control the heating operation state of the heating module 200 according to the ambient temperature. Specifically, the ambient temperature sensing unit can be a temperature sensing element, such as a bimetallic strip, a thermistor (NTC / PTC), or a thermocouple. In some embodiments, the first heating control module 300 can be a temperature control switch.
[0042] The second heating control module 400 is disposed between the power input port 100 and the heating module 200, and is connected in parallel with the first heating control module 300. The second heating control module 400 includes a circuit status detection unit 410, which is disposed between the first heating control module 300 and the power input port 100. The circuit status detection unit 410 detects a first operating state of the first heating control module 300, and the second heating control module 400 controls the heating operation state of the heating module 200 based on the first operating state. It should be noted that the first operating state indicates whether the first heating control module 300 is currently in normal operation, normal shutdown, or fault state. The heating operation state indicates whether the heating module 200 is currently in a heating or non-heating state.
[0043] The motor moisture-proof heating circuit provided in this application embodiment, by setting a first heating control module and a second heating control module before the heating module, can not only automatically control the heating module to turn on according to the ambient temperature, thus promptly starting heating in high humidity or low temperature environments to prevent the motor from getting damp, but also, by setting a parallel second heating control module, realize the detection of the working status of the first heating control module and the backup control path, ensuring that the heating circuit can still maintain stable operation when the path formed by the heating module and the first heating control module fails, thereby effectively enhancing the reliability and adaptability of the heating circuit in long-term shutdown states. Overall, the heating circuit solution of this application embodiment can achieve motor moisture protection without increasing the complexity of operation, thereby improving the availability of the motor during periods of inactivity.
[0044] In some embodiments, the heating module 200 may be a resistance heating wire, a PTC self-regulating heating element, a flexible heating sheet, a ceramic heater, or a carbon fiber heating element, etc., and is not limited thereto.
[0045] In some embodiments, such as Figure 1 As shown, the second heating control module 400 includes a circuit status detection unit 410, a data processing unit 420, and a bypass current control unit 430. Specifically, the bypass current control unit 430 is located between the power input port 100 and the heating module 200, and the bypass current control unit 430 is connected in parallel to the first heating control module 300.
[0046] The data processing unit 420 is connected to both the circuit status detection unit 410 and the bypass current control unit 430. The circuit status detection unit 410 detects the first operating state of the first heating control module 300. The data processing unit 420 controls the second operating state of the bypass current control unit 430 based on the first operating state, thereby controlling the heating operation state of the heating module 200. It should be noted that when the first heating control module 300 is a temperature control switch, its failure rate is relatively high. The circuit status detection unit 410 can be a current acquisition unit or a voltage acquisition unit. When the circuit status detection unit 410 detects a sudden change in current or voltage in its circuit during the expected heating period, it sends a signal to the data processing unit 420. The data processing unit 420 can then determine that the first operating state of the first heating control module 300 is a fault state based on this signal. Alternatively, the data processing unit 420 can directly read the data collected by the circuit status detection unit 410. When a sudden change in the collected current or voltage signal is detected, the data processing unit 420 can directly determine that the first operating state is a fault state. If the current and voltage are uniform and without sudden changes during the expected heating period, the circuit status detection unit 410 can determine that the first operating state is a normal operating state. If it is during an unexpected heating period, the first operating state can be directly determined to be a normal shutdown state.
[0047] Please see Figure 2 , Figure 2 This is another optional schematic diagram of the heating circuit for motor moisture protection provided in this application embodiment. In some embodiments, the bypass current control unit 430 includes a bypass current control switch, which is configured with a controlled terminal, an input terminal, and an output terminal. The controlled terminal is connected to the data processing unit 420, the input terminal is connected to the power input port 100, and the output terminal is used to connect to the heating module 200. The data processing unit 420 generates a switch control signal according to a first operating state and sends the switch control signal to the bypass current control switch through the controlled terminal. The bypass current control switch is used to connect its output terminal to the heating module 200 according to the switch control signal. In other words, when the data processing unit 420 determines that the first operating state is a fault state, it sends a switch control signal to the bypass current control switch. After receiving the switch control signal, the bypass current control switch closes, so that the heating module 200 is connected to the power input port 100 through the bypass current control switch, forming a bypass loop. When the first heating control module 300 is in a fault state, it is equivalent to the first heating control module 300 being open-circuited. At this time, the bypass current control unit is closed, so that the heating module 200 can be continuously powered on and maintain the heating state.
[0048] Please see Figure 3 , Figure 3 This is another optional schematic diagram of the heating circuit for motor moisture protection provided in this application embodiment. In some embodiments, the second heating control module 400 further includes an ambient humidity sensing unit 440, which is connected to the data processing unit 420. The ambient humidity sensing unit 440 is used to detect ambient humidity, and the data processing unit is used to determine the target heating power based on the ambient humidity. It should be noted that the ambient humidity sensing unit 440 can be a physical sensor for directly measuring the air humidity in the environment where the motor is placed, or it can be configured as a unit with network communication capabilities to access online weather services via the Internet and obtain ambient humidity data of the current location.
[0049] The data processing unit 420 is equipped with a first communication subunit 421, and the heating module 200 includes a second communication subunit 201. The data processing unit 420 is used to send a target heating power to the heating module 200 through the first communication subunit 421. The heating module is used to receive the target heating power through the second communication subunit and determine the heating operating status based on the target heating power.
[0050] The heating module 200 can be set to multiple preset power levels, such as low, medium, and high, corresponding to 50W, 100W, and 150W respectively (the power values can be adjusted according to actual needs; this embodiment is only for illustrative purposes and the power values of the preset power levels are not strictly limited). This addresses heating requirements under different humidity conditions, ensuring effective dissipation of potential moisture inside the motor cavity while avoiding energy waste and structural aging caused by overheating. For example, when the ambient humidity is below 60%, the data processing unit 420 determines that the humidity is relatively dry and sends the target heating power of 50W (corresponding to the low power level) to the heating module 200. The heating module 200 then activates the low power level, confirming the heating operation as low-power heating to maintain basic moisture protection. When the humidity is between 60% and 80%, indicating a certain risk of humidity accumulation, the target heating power of 100W (corresponding to the medium power setting) is sent to the heating module 200. The heating module 200 then activates the medium power setting to improve moisture removal capabilities. Conversely, when the humidity exceeds 80%, indicating a higher risk of moisture absorption, the target heating power of 150W (corresponding to the high power setting) is sent to the heating module 200. The heating module 200 then activates the high power setting to quickly heat the motor cavity and evaporate moisture as rapidly as possible. This embodiment not only enables dynamic adjustment of the motor's moisture-proof effect but also possesses a high level of intelligence, making it suitable for long-term stable operation in various complex application scenarios.
[0051] Please see Figure 4 , Figure 4This is another optional schematic diagram of the heating circuit for motor moisture protection provided in the embodiments of this application. In some embodiments, the heating circuit further includes a display module 600, which is connected to the data processing unit 420. The display module 600 is used to display at least one of the first operating state of the first heating control module 300, the heating working state of the heating module, and the second operating state of the bypass current control unit 430.
[0052] In some embodiments, the heating circuit further includes an indicator light 700, which is connected in parallel to the heating module 200 and the first heating control module 300. The indicator light 700 is used to indicate whether the external power supply 500 can supply power normally. It is understood that when the external power supply 500 is connected to the power input port 100 and the indicator light 700 is on, it indicates that the external power supply 500 can supply power normally. When the external power supply 500 is connected to the power input port 100 and the indicator light 700 is off, it indicates that the external power supply 500 cannot supply power normally.
[0053] In some embodiments, the heating circuit further includes a leakage current protection module 800, which is disposed between the power input port 100 and the heating module 200. It should be noted that the external power supply 500 also needs to be grounded.
[0054] This application also provides an electronic device that includes the heating circuit described in any of the above embodiments. The electronic device provided by this application provides at least the following technical advantages: by using the heating circuit described in the foregoing embodiments, the heating circuit can maintain stable operation even when the path formed by the heating module and the first heating control module fails, thus achieving moisture protection for the motor and improving the availability of the motor equipment.
[0055] It should be noted that the existing technical solution cannot provide intervention measures for the failure of the heater temperature control switch (i.e., the first heating control module in this embodiment). Under the existing wiring scheme, if the first heating control module fails but the heating module 200 still needs to be put into operation, the heater wiring needs to be disassembled and the cable re-terminated, increasing the workload of operation and maintenance.
[0056] Based on this, this application also provides a heating device. Please refer to... Figure 5 , Figure 5This is an optional schematic diagram of the heating device provided in the embodiments of this application. The heating device includes a junction box assembly and a switch box assembly. The junction box assembly includes a heating module 200 and a first heating control module 300. The switch box assembly includes a power input port 100 and a second heating control module 400. The first heating control module 300 in the junction box assembly and the second heating control module 400 in the switch box assembly are connected in parallel. The heating module 200 in the junction box assembly is connected to the power input port 100 in the switch box assembly to form a heating circuit as described in any of the foregoing embodiments.
[0057] The heating device provided in this application embodiment has at least the following technical advantages: A first heating control module is disposed in a junction box assembly, which is adjacent to the heater and typically installed near the motor. By placing the first heating control module and the heating module in the junction box assembly, the temperature control logic can be more closely aligned with the actual heated area, improving temperature control accuracy and response speed. Furthermore, since the junction box assembly is an independent modular structure, if a temperature control switch malfunctions, there is no need to disassemble the main power supply line; simply replacing the corresponding module in the junction box restores normal operation, significantly reducing the frequency of traditional high-workload operations such as wire disconnection and termination. This structure is particularly suitable for scenarios requiring on-site judgment and rapid intervention, ensuring the heater's controllability while improving the system's operational convenience and maintainability. Simultaneously, by constituting the heating circuit described in the first aspect, this heating device ensures that the heating circuit can maintain stable operation even when the path formed by the heating module and the first heating control module fails, achieving moisture protection for the motor and thus improving the motor's availability during periods of inactivity.
[0058] This application also provides another heating device; please refer to [link to relevant documentation]. Figure 6 , Figure 6 This is another optional schematic diagram of the heating device provided in the embodiments of this application. The heating device includes a junction box assembly and a switch box assembly. The junction box assembly includes a heating module 200, and the switch box assembly includes a power input port 100, a first heating control module 300, and a second heating control module 400. The heating module 200 in the junction box assembly is connected to the first heating control module 300, the second heating control module 400, and the power input port 100 in the switch box assembly, respectively, to form a heating circuit as described in any of the foregoing embodiments.
[0059] The heating device provided in this application embodiment has at least the following technical advantages: the temperature control switch is located in the switch box assembly, i.e., away from the heating module, and is usually installed in the motor control cabinet or power distribution area. This structure further decouples the load and control part of the heating module physically, and all key control logic is concentrated in the switch box, which facilitates unified management and replacement from the upper system or remote control center. When the first heating control module fails, there is no need to go to the motor site for disassembly; the control module can be directly replaced at the power distribution end, further avoiding maintenance obstacles caused by high temperature, high humidity, or confined space at the motor end. In addition, the centralized structure of the switch box also facilitates the integration of other modules such as circuit breakers, bypass switches, and humidity sensors, providing good functional expandability. At the same time, by forming the heating circuit described in the first aspect, this heating device ensures that the heating circuit can still maintain stable operation when the path formed by the heating module and the first heating control module fails, achieving moisture protection for the motor and thus improving the availability of the motor during periods of inactivity.
[0060] The embodiments described in this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the evolution of technology and the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.
[0061] Those skilled in the art will understand that the technical solutions shown in the figures do not constitute a limitation on the embodiments of this application, and may include more or fewer steps than shown, or combine certain steps, or different steps.
[0062] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.
[0063] Those skilled in the art will understand that all or some of the steps in the methods disclosed above, as well as the functional modules / units in the systems and devices, can be implemented as software, firmware, hardware, or suitable combinations thereof.
[0064] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0065] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.
[0066] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.
[0067] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0068] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0069] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.
Claims
1. A heating circuit for moisture protection of an electric motor, characterized in that, The heating circuit includes: Power input port, used to connect to an external power source; The heating module is connected to the power input port; A first heating control module is disposed between the power input port and the heating module. The first heating control module is equipped with an ambient temperature sensing unit. The ambient temperature sensing unit is used to detect the ambient temperature, and the first heating control module is used to control the heating operation status of the heating module according to the ambient temperature. A second heating control module is disposed between the power input port and the heating module. The second heating control module is connected in parallel with the first heating control module. The second heating control module is equipped with a circuit status detection unit, which is disposed between the first heating control module and the power input port. The circuit status detection unit is used to detect a first operating state of the first heating control module. The second heating control module is used to control the heating operation state of the heating module according to the first operating state.
2. The heating circuit according to claim 1, characterized in that, The second heating control module includes the circuit status detection unit, the data processing unit, and the bypass current control unit. The bypass current control unit is disposed between the power input port and the heating module, and the bypass current control unit is connected in parallel to the first heating control module. The data processing unit is connected to the circuit state detection unit and the bypass current control unit respectively. The circuit state detection unit is used to detect the first operating state of the first heating control module, and the data processing unit is used to control the second operating state of the bypass current control unit according to the first operating state, so as to control the heating operation state of the heating module.
3. The heating circuit according to claim 2, characterized in that, The bypass current control unit includes a bypass current control switch, which is configured with a controlled terminal, an input terminal, and an output terminal. The controlled terminal is connected to the data processing unit, the input terminal is connected to the power input port, and the output terminal is used to connect to the heating module. The data processing unit generates a switch control signal based on the first operating state and sends the switch control signal to the bypass current control switch through the controlled terminal. The bypass current control switch is used to connect the output terminal to the heating module according to the switch control signal.
4. The heating circuit according to claim 2, characterized in that, The second heating control module further includes an ambient humidity sensing unit connected to the data processing unit. The ambient humidity sensing unit is used to detect ambient humidity, and the data processing unit is used to determine the target heating power based on the ambient humidity. The data processing unit is configured with a first communication subunit, and the heating module includes a second communication subunit. The data processing unit is used to send the target heating power to the heating module through the first communication subunit. The heating module is used to receive the target heating power through the second communication subunit and determine the heating operating status based on the target heating power.
5. The heating circuit according to claim 2, characterized in that, The heating circuit further includes a display module connected to the data processing unit. The display module is used to display at least one of the first operating state of the first heating control module, the heating operating state of the heating module, and the second operating state of the bypass current control unit.
6. The heating circuit according to any one of claims 1 to 5, characterized in that, The heating circuit also includes an indicator light, which is connected in parallel to the heating module and the first heating control module.
7. The heating circuit according to any one of claims 1 to 5, characterized in that, The heating circuit also includes a leakage protection module, which is located between the power input port and the heating module.
8. An electronic device, characterized in that, The electronic device includes the heating circuit according to any one of claims 1 to 7.
9. A heating device, characterized in that, The heating device includes a junction box assembly and a switch box assembly. The junction box assembly includes a heating module and a first heating control module. The switch box assembly includes a power input port and a second heating control module. The first heating control module in the junction box assembly is connected in parallel with the second heating control module in the switch box assembly, and the heating module in the junction box assembly is connected to the power input port in the switch box assembly to form a heating circuit as described in any one of claims 1 to 7.
10. A heating device, characterized in that, The heating device includes a junction box assembly and a switch box assembly. The junction box assembly includes a heating module, and the switch box assembly includes a power input port, a first heating control module, and a second heating control module. The heating module in the junction box assembly is connected to the first heating control module, the second heating control module and the power input port in the switch box assembly, respectively, to form a heating circuit as described in any one of claims 1 to 7.