Heat dissipation system of explosion-proof motor controller and control method thereof

Abstract

The invention provides a heat dissipation system of an explosion-proof motor controller and a control method of the heat dissipation system. The explosion-proof motor controller comprises a bottom plate and a controller main body arranged on the bottom plate, a control circuit board is arranged in the controller main body, the heat dissipation system comprises a temperature sensor, the temperature sensor is arranged in the controller main body, the temperature sensor is used for detecting the temperature of the explosion-proof motor controller, and the temperature sensor is electrically connected with the control circuit board; and the heat dissipation device is electrically connected with the control circuit board, and the heat dissipation device is used for cooling the bottom plate of the controller main body. According to the technical scheme, the control circuit board is used for controlling starting, stopping and speed regulation of the explosion-proof motor, and the heat dissipation device is arranged outside the controller body and used for dissipating heat of the explosion-proof motor controller. The temperature sensor monitors the temperature of the explosion-proof motor controller in real time, so that the heat dissipation device and the explosion-proof motor can be conveniently controlled, the optimal heat dissipation effect is achieved, and normal operation of the motor is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof motors, and in particular, to a heat dissipation system and a control method for an explosion-proof motor controller. Background Art

[0002] In the prior art, with the continuous improvement of industrial automation, explosion-proof electric motors are increasingly widely used in flammable and explosive environments such as coal mines and petrochemical industries. However, existing explosion-proof motor controllers generally have poor heat dissipation effects. Especially under long-term operation or high load conditions, it is easy to cause the motor to overheat, leading to potential safety hazards.

[0003] Taking the working environment of miners as an example, explosion-proof electric motors are widely used in explosion-proof electric trackless rubber-tyred vehicles. When the explosion-proof electric trackless rubber-tyred vehicle climbs a long slope, due to the poor heat dissipation effect of the commonly used air-cooling system of the vehicle, the IGBT components of the explosion-proof motor controller are prone to over-temperature protection, the motor runs abnormally, the vehicle use experience deteriorates, and potential safety hazards are caused.

[0004] In view of the above technical problem of the poor heat dissipation effect of the explosion-proof motor controller, no effective solution has been proposed yet. Summary of the Invention

[0005] The main object of the present invention is to provide a heat dissipation system and a control method for an explosion-proof motor controller to solve the technical problem of the poor heat dissipation effect of the explosion-proof motor controller in the prior art.

[0006] To achieve the above object, according to one aspect of the present invention, a heat dissipation system for an explosion-proof motor controller is provided. The explosion-proof motor controller includes a bottom plate and a controller main body disposed on the bottom plate. A control circuit board is disposed in the controller main body. The heat dissipation system includes: a temperature sensor disposed in the controller main body for detecting the temperature of the explosion-proof motor controller, and the temperature sensor is electrically connected to the control circuit board; a heat dissipation device electrically connected to the control circuit board for cooling the bottom plate of the controller main body.

[0007] Further, the heat dissipation device includes a spray cooling device, and the spray cooling device at least includes a nozzle, a spray water pipe, and a liquid supply device. The nozzle is at least one, the outlet end of the nozzle faces the bottom plate, and the inlet end of the nozzle is communicated with the liquid supply device through the spray water pipe.

[0008] Further, the heat dissipation device includes: a diversion cooling plate, and the diversion cooling plate is at least one. The diversion cooling plate is disposed on the side of the bottom plate opposite to the controller main body, and the diversion cooling plate is detachably connected to the bottom plate. A diversion channel for the coolant to flow through is disposed in the diversion cooling plate to cool down the bottom plate.

[0009] Further, the heat dissipation device further includes: an expansion tank, an outlet end of the expansion tank is communicated with an inlet end of the diversion cooling plate through a first diversion pipe; an electric water pump assembly, the electric water pump assembly is communicated with an inlet end of the expansion tank through a third diversion pipe, and the electric water pump assembly is communicated with an outlet end of the diversion cooling plate through a second diversion pipe.

[0010] Further, a sealing gasket is provided between the diversion cooling plate and the bottom plate.

[0011] Further, a water pump control module is further provided in the controller main body, and the water pump control module is electrically connected to the water pump motor and the expansion tank of the electric water pump assembly.

[0012] According to another aspect of the present invention, a control method for a heat dissipation system of an explosion-proof motor controller is provided. The control method is used to control the heat dissipation system of the above-mentioned explosion-proof motor controller, and the method includes the following steps: detecting the temperature of the explosion-proof motor controller; when it is determined that the temperature of the explosion-proof motor controller meets a preset temperature condition, generating a first control instruction in the control instruction set, and the first control instruction is used to reduce the operating speed of the explosion-proof motor.

[0013] Further, after generating the first control instruction in the control instruction set, the method further includes the following steps: when it is determined that the temperature of the explosion-proof motor controller continues to rise within a preset time period, generating a second control instruction in the control instruction set, and the second control instruction is used to control the heat dissipation device to enter a working state to cool down the explosion-proof motor controller.

[0014] Further, the preset temperature condition is that the temperature of the explosion-proof motor controller is greater than a first preset temperature threshold.

[0015] Further, the method further includes: when it is determined that the temperature of the explosion-proof motor controller is greater than a second preset temperature threshold, generating a third control instruction, and the third control instruction is used to control the explosion-proof motor to stop running; wherein, the second preset temperature threshold is greater than the first preset temperature threshold.

[0016] Applying the technical solution of the present invention, the control circuit board is used to control the start, stop and speed regulation of the explosion-proof motor. The heat dissipation device is arranged outside the controller main body and is used to dissipate the heat of the explosion-proof motor controller. The temperature sensor is arranged inside the controller main body and is used to monitor the temperature of the controller. By monitoring the temperature of the explosion-proof motor controller in real time, it is convenient to control the heat dissipation device and the explosion-proof motor to achieve the optimal heat dissipation effect, ensure the normal operation of the motor, and further improve the safety of the explosion-proof motor and the vehicle using this embodiment. Description of the Drawings

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a first embodiment of a heat dissipation system of an explosion-proof motor controller according to the present invention is shown;

[0019] Figure 2 A schematic structural diagram of a second embodiment of a heat dissipation system of an explosion-proof motor controller according to the present invention is shown;

[0020] Figure 3 An electrical schematic diagram of an explosion-proof motor controller according to the present invention is shown.

[0021] Among them, the above-mentioned drawings include the following reference numerals:

[0022] 1. Expansion tank; 2. First diversion pipe; 3. Fastening bolt; 4. Diversion cooling plate; 5. Sealing gasket; 6. Bottom plate; 7. DC-DC module; 8. IGBT module; 9. Temperature sensor; 10. Water pump control module; 11. Second diversion pipe; 12. Electric water pump assembly; 13. Third diversion pipe. Detailed implementation manners

[0023] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and thus their description will be omitted.

[0027] Combined with Figures 1 to 3 As shown, according to a specific embodiment of the present application, a heat dissipation system for an explosion-proof motor controller is provided.

[0028] Specifically, the explosion-proof motor controller includes a bottom plate 6 and a controller main body disposed on the bottom plate 6. A control circuit board is disposed in the controller main body. The heat dissipation system of the explosion-proof motor controller includes a temperature sensor 9 and a heat dissipation device. The temperature sensor 9 is disposed in the controller main body. The temperature sensor 9 is used to detect the temperature of the explosion-proof motor controller. The temperature sensor 9 is electrically connected to the control circuit board; the heat dissipation device is electrically connected to the control circuit board, and the heat dissipation device is used to cool the bottom plate 6 of the controller main body.

[0029] Applying the technical solution of this embodiment, the control circuit board is used to control the start, stop and speed regulation of the explosion-proof motor. The heat dissipation device is disposed outside the controller main body and is used to dissipate the heat of the explosion-proof motor controller. The temperature sensor is disposed inside the controller main body and is used to monitor the temperature of the controller. By monitoring the temperature of the explosion-proof motor controller in real time, it is convenient to control the heat dissipation device and the explosion-proof motor to achieve the optimal heat dissipation effect, ensure the normal operation of the motor, and further improve the safety of the explosion-proof motor and the vehicle applying this embodiment.

[0030] In an exemplary embodiment of the present application, the bottom plate 6 is a copper bottom plate, and an installation position is provided at the bottom of the bottom plate 6 for installing a heat dissipation device. Devices such as a DC-DC module 7 and an IGBT module 8 are provided inside the controller body.

[0031] Optionally, the heat dissipation device includes a spray cooling device. The spray cooling device at least includes a nozzle, a spray water pipe, and a liquid supply device. The nozzle is at least one, and the outlet end of the nozzle is arranged facing the bottom plate 6. The liquid inlet end of the nozzle is communicated with the liquid supply device through the spray water pipe. By arranging the nozzle, spray cooling of the bottom plate 6 can be realized. By adjusting the water outlet rate of the nozzle, the cooling efficiency can be adjusted. At the same time, according to the temperature distribution of each area of the bottom plate 6, the number of nozzles correspondingly arranged in each area can be adjusted to further improve the cooling effect.

[0032] Optionally, the heat dissipation device includes a diversion cooling plate 4. The diversion cooling plate 4 is at least one, and the diversion cooling plate 4 is arranged on the side of the bottom plate 6 opposite to the controller body. The diversion cooling plate 4 is detachably connected to the bottom plate 6. A diversion channel for the coolant to flow through is arranged inside the diversion cooling plate 4 to cool down the bottom plate 6. In this embodiment, by arranging the diversion cooling plate 4 on the outer surface of the bottom plate 6 of the controller body, the heat dissipation effect is enhanced.

[0033] In an exemplary embodiment of the present application, the diversion cooling plate 4 is connected to the bottom plate 6 through a fastening bolt 3. Specifically, as Figure 1 shown, a plurality of assembly holes are arranged at intervals along the circumferences of the bottom plate 6 and the diversion cooling plate 4 for the fastening bolt 3 to pass through. Optionally, the bottom plate 6 is a rectangular plate, and two limiting bosses are arranged at the bottom of the rectangular plate. The limiting bosses extend along the length direction of the rectangular plate, and the two limiting bosses are arranged at intervals along the width direction of the rectangular plate, so as to form an assembly space for assembling the diversion cooling plate 4 between the two limiting bosses.

[0034] Specifically, the diversion channel inside the diversion cooling plate 4 can be in various shapes such as a snake shape, a cross shape, a grid shape, etc.

[0035] Furthermore, the heat dissipation device further includes an expansion tank 1 and an electric water pump assembly 12. The outlet end of the expansion tank 1 is communicated with the liquid inlet end of the diversion cooling plate 4 through a first diversion pipe 2; the electric water pump assembly 12 is communicated with the inlet end of the expansion tank 1 through a third diversion pipe 13, and the electric water pump assembly 12 is communicated with the liquid outlet end of the diversion cooling plate 4 through a second diversion pipe 11.

[0036] In this embodiment, the expansion tank 1, the diversion cooling plate 4, and the electric water pump assembly 12 are connected in series by 3 diversion pipes to form a closed loop. The diversion cooling plate 4 is connected in series between the first diversion pipe 2 and the second diversion pipe 11. The coolant is introduced into the expansion tank 1 for cooling by controlling the rotation speed of the electric water pump assembly 12.

[0037] Furthermore, a sealing gasket 5 is provided between the diversion cooling plate 4 and the bottom plate 6. By providing the sealing gasket 5, the connection tightness between the diversion cooling plate 4 and the bottom plate 6 can be ensured, preventing impurities from entering between the diversion cooling plate 4 and the bottom plate 6 and affecting the cooling effect.

[0038] Furthermore, a water pump control module 10 is also provided inside the controller body. The water pump control module 10 is electrically connected to the water pump motor of the electric water pump assembly 12 and the expansion tank 1.

[0039] In this embodiment, by electrically connecting the water pump control module 10 to the water pump motor of the electric water pump assembly 12 and the expansion tank 1, the control of the rotational speed of the water pump motor and the coolant flow rate of the expansion tank 1 can be realized. Furthermore, the coolant flow rate of the diversion cooling plate 4 can be adjusted, changing the cooling effect of the diversion cooling plate 4, so that the temperature of the explosion-proof motor controller meets the requirements.

[0040] The heat dissipation system of the explosion-proof motor controller in the above embodiment can be applied to the mining technology field. For example, it can be applied to mining electric trackless rubber-tyred vehicles and mine refrigeration equipment. In the heat dissipation system, the diversion cooling plate 4 is placed at the bottom of the explosion-proof motor controller of the mining electric vehicle. The temperature sensor 9 in the explosion-proof motor controller collects the water temperature value, and the water pump control module 10 adjusts the rotational speed of the water pump motor, controlling the coolant flow rate into the expansion tank 1, realizing the effective cooling of the IGBT and DC / DC power components in the explosion-proof controller of the mining electric vehicle, effectively avoiding potential safety hazards caused by overheating, and providing a strong guarantee for safe production in flammable and explosive environments.

[0041] In a preferred embodiment of the present application, the working process of the heat dissipation system of the explosion-proof motor controller is as follows:

[0042] First, the user inputs an instruction through the operation button or touch screen on the surface of the controller body. After the control circuit board receives the instruction, it performs corresponding control operations on the motor. At the same time, the temperature sensor monitors the temperature of the explosion-proof motor controller in real time. When the temperature exceeds the set threshold, the control circuit board will adjust the operating state of the motor or start the heat dissipation device for heat dissipation. Specifically, when the temperature exceeds the set threshold, the control circuit board can reduce the operating speed of the motor or stop the motor. If the temperature continues to rise, the system will further start a backup heat dissipation device, such as a spray cooling system, etc., to ensure the normal operation of the controller.

[0043] According to another specific embodiment of the present application, a control method for the heat dissipation system of the explosion-proof motor controller is also provided. The control method is used to control the heat dissipation system of the explosion-proof motor controller in the above embodiment. The method includes the following steps:

[0044] Step S100, detecting the temperature of the explosion-proof motor controller;

[0045] Step S200, when it is determined that the temperature of the explosion-proof motor controller meets the preset temperature condition, generate the first control instruction in the control instruction set, and the first control instruction is used to reduce the operating speed of the explosion-proof motor.

[0046] Applying the technical solution of this embodiment, detect the temperature of the explosion-proof motor controller. When it is determined that the temperature of the explosion-proof motor controller meets the preset temperature condition, generate the first control instruction in the control instruction set, and the first control instruction is used to reduce the operating speed of the explosion-proof motor. By reducing the operating speed of the explosion-proof motor, the motor heating rate can be reduced, and then the temperature of the explosion-proof motor controller can be reduced. When the temperature of the explosion-proof motor controller is slightly high but does not reach the too-high threshold, choosing to reduce the operating speed of the explosion-proof motor to achieve temperature reduction can reduce the energy loss of the heat dissipation system.

[0047] Optionally, after generating the first control instruction in the control instruction set, the method further includes the following steps:

[0048] Step S300, when it is determined that the temperature of the explosion-proof motor controller continues to rise within a preset time period, generate the second control instruction in the control instruction set, and the second control instruction is used to control the heat dissipation device to enter the working state to cool down the explosion-proof motor controller.

[0049] Through step S300, when the temperature of the explosion-proof motor controller still continues to rise after reducing the operating speed of the explosion-proof motor, controlling the heat dissipation device to enter the working state can quickly cool down the explosion-proof motor controller and avoid device damage caused by too high a temperature of the explosion-proof motor controller.

[0050] Optionally, the preset temperature condition is that the temperature of the explosion-proof motor controller is greater than the first preset temperature threshold. The first preset temperature threshold can be determined comprehensively according to the current operating speed of the explosion-proof motor, the vehicle operating state, the ambient temperature, etc.

[0051] Optionally, the method further includes:

[0052] Step S400, when it is determined that the temperature of the explosion-proof motor controller is greater than the second preset temperature threshold, generate the third control instruction, and the third control instruction is used to control the explosion-proof motor to stop running; wherein, the second preset temperature threshold is greater than the first preset temperature threshold.

[0053] Through step S400, when the temperature of the explosion-proof motor controller is greater than the second preset temperature threshold, it indicates that the explosion-proof motor controller is too high at this time, and there is a safety hazard if the explosion-proof motor continues to run. Timely stopping the explosion-proof motor can avoid damage to the explosion-proof motor.

[0054] According to another specific embodiment of the present application, a vehicle is further provided. An explosion-proof motor is arranged inside the vehicle. The vehicle can be an explosion-proof electric command vehicle, an explosion-proof electric trackless rubber-tyred vehicle or other special vehicles. Among them, the vehicle is provided with the heat dissipation system of the explosion-proof motor controller in the above-mentioned embodiment to dissipate heat and cool down the explosion-proof motor controller.

[0055] For the sake of convenience of description, spatial relative terms, such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc., can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will be positioned "below other devices or structures" or "under other devices or structures" afterwards. Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations are made for the spatial relative descriptions used here.

[0056] In addition to the above, it should also be noted that the "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in connection with this embodiment being included in at least one embodiment generally described in the present application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in connection with any embodiment, it is intended that the implementation of such feature, structure or characteristic in combination with other embodiments also falls within the scope of the present invention.

[0057] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A heat dissipation system for an explosion-proof motor controller, characterized in that, The explosion-proof motor controller includes a bottom plate (6) and a controller main body disposed on the bottom plate (6). A control circuit board is provided in the controller main body. The heat dissipation system includes: A temperature sensor (9), which is disposed in the controller main body. The temperature sensor (9) is used to detect the temperature of the explosion-proof motor controller and is electrically connected to the control circuit board. A heat dissipation device, which is electrically connected to the control circuit board and is used to cool the bottom plate (6) of the controller main body.

2. The heat dissipation system of the explosion-proof motor controller according to claim 1, wherein, The heat dissipation device includes a spray cooling device, which at least includes a spray head, a spray water pipe and a liquid supply device. The spray head is at least one, and the outlet end of the spray head is arranged towards the bottom plate (6). The liquid inlet end of the spray head is communicated with the liquid supply device through the spray water pipe.

3. The heat dissipation system of the explosion-proof motor controller according to claim 1, characterized in that, The heat dissipation device includes: A diversion cooling plate (4), which is at least one. The diversion cooling plate (4) is disposed on the side of the bottom plate (6) opposite to the controller main body. The diversion cooling plate (4) is detachably connected to the bottom plate (6). A diversion channel for the coolant to flow through is provided in the diversion cooling plate (4) to cool down the bottom plate (6).

4. The heat dissipation system of the explosion-proof motor controller according to claim 3, characterized in that, The heat dissipation device further includes: An expansion water tank (1), and the outlet end of the expansion water tank (1) is communicated with the liquid inlet end of the diversion cooling plate (4) through a first diversion pipe (2). An electric water pump assembly (12), the electric water pump assembly (12) is communicated with the inlet end of the expansion water tank (1) through a third diversion pipe (13), and the electric water pump assembly (12) is communicated with the liquid outlet end of the diversion cooling plate (4) through a second diversion pipe (11).

5. The heat dissipation system of the explosion-proof motor controller according to claim 4, characterized in that, A sealing gasket (5) is provided between the diversion cooling plate (4) and the bottom plate (6).

6. The heat dissipation system of the explosion-proof motor controller according to claim 4, characterized in that, A water pump control module (10) is further provided in the controller main body. The water pump control module (10) is electrically connected to the water pump motor of the electric water pump assembly (12) and the expansion water tank (1).

7. A control method for a heat dissipation system of an explosion-proof motor controller, characterized in that, The control method is used to control the heat dissipation system of the explosion-proof motor controller according to any one of claims 1-6. The method includes the following steps: Detect the temperature of the explosion-proof motor controller. When it is determined that the temperature of the explosion-proof motor controller meets the preset temperature condition, generate a first control instruction in the control instruction set. The first control instruction is used to reduce the operating speed of the explosion-proof motor.

8. The method according to claim 7, wherein After generating the first control instruction in the control instruction set, the method further includes the following steps: When it is determined that the temperature of the explosion-proof motor controller continues to rise within a preset time period, generate a second control instruction in the control instruction set. The second control instruction is used to control the heat dissipation device to enter the working state to cool down the explosion-proof motor controller.

9. The method according to claim 7, characterized in that The preset temperature condition is that the temperature of the explosion-proof motor controller is greater than a first preset temperature threshold.

10. The method according to claim 9, characterized in that, The method further includes: When it is determined that the temperature of the explosion-proof motor controller is greater than the second preset temperature threshold, a third control instruction is generated, and the third control instruction is used to control the explosion-proof motor to stop running; Wherein, the second preset temperature threshold is greater than the first preset temperature threshold.

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