A mine explosion-proof and intrinsically safe frequency converter

Abstract

The utility model discloses an explosion -proof and intrinsically safe type frequency converter of mine, relates to the explosion -proof and intrinsically safe type frequency converter technical field of mine. Including: the body, frequency converter main part, controller, heat dissipation subassembly and heat conduction component, the body includes first cavity and second cavity, is equipped with the explosion -proof board between first cavity and second cavity, the hot end of heat dissipation subassembly and the heating element of frequency converter main part contact, and controller and heat dissipation subassembly and heat conduction component electricity are connected, wherein, heat conduction component includes: heat conduction pipe, and heat conduction pipe is the loop structure, heat conduction component hot end, and heat conduction component hot end and the heating element of frequency converter main part contact, fluid driver, fluid driver sets up in heat conduction pipe, and drives the fluid in heat conduction pipe and flows from hot end to the heat dissipation end, and fluid driver and controller electricity are connected, first heat dissipation end, and first heat dissipation end is equipped in the moistureproof area in first cavity. The utility model embodiment is applicable to the explosion -proof and intrinsically safe type frequency converter scene of mine.

Description

Technical Field

[0001] This utility model relates to the technical field of explosion-proof and intrinsically safe frequency converters for mining, and particularly to an explosion-proof and intrinsically safe frequency converter for mining. Background Technology

[0002] Mines have extremely complex environments, and electrical equipment used in mines must strictly meet explosion-proof and intrinsic safety requirements. At the same time, frequency converters generate a lot of heat, so explosion-proof and heat dissipation must be ensured. In addition, the high humidity environment underground may cause condensation on the internal components of the frequency converter. Therefore, it is necessary to balance explosion-proof, heat dissipation and moisture prevention while ensuring the normal operation of the frequency converter. Utility Model Content

[0003] In view of this, the present invention provides a mine-use explosion-proof and intrinsically safe frequency converter that can achieve a balance between heat dissipation and moisture protection while being used underground in mines.

[0004] This utility model provides a mine-use explosion-proof and intrinsically safe frequency converter, comprising: a body, a frequency converter main body, a controller, a heat dissipation component, and a heat conduction component; the body includes a first cavity and a second cavity; an explosion-proof plate is provided between the first cavity and the second cavity; the heat dissipation component is disposed outside the body, and the hot end of the heat dissipation component is in contact with the heat-generating element of the frequency converter main body; the frequency converter main body and the heat conduction component are disposed within the first cavity; the controller is electrically connected to the heat dissipation component and the heat conduction component; wherein, the heat conduction component includes: a heat conduction pipe, the heat conduction pipe having a loop structure; a hot end of the heat conduction component, the hot end of the heat conduction component being in contact with the heat-generating element of the frequency converter main body; a fluid actuator, the fluid actuator being disposed within the heat conduction pipe and driving fluid in the heat conduction pipe to flow from the hot end to the heat dissipation end; the fluid actuator being electrically connected to the controller; and a first heat dissipation end, the first heat dissipation end being disposed in a moisture-proof area within the first cavity.

[0005] Optionally, the hot end of the heat dissipation component and the hot end of the heat conduction component are fixedly connected side by side to the heat-generating element of the inverter body.

[0006] Optionally, the ratio of the contact area between the heat-generating component of the inverter body and the hot end of the heat dissipation component to the contact area between the hot end of the heat-conducting component is in the range of 19:1 to 3:2.

[0007] Optionally, the heat-conducting component further includes a second heat-dissipating end; the second heat-dissipating end is fixedly connected to the hot end of the heat-dissipating component.

[0008] Optionally, the heat pipe includes at least a first circuit and a second circuit; the first heat dissipation end is in the first circuit, and the second heat dissipation end is in the second circuit; both the first circuit and the second circuit are provided with a solenoid valve or a flow regulating valve, and the solenoid valve or the flow regulating valve is electrically connected to the controller.

[0009] Optionally, a temperature sensor and a humidity sensor may also be included; the temperature sensor and the humidity sensor are electrically connected to the controller.

[0010] Optionally, the fluid drive is an air pump, a liquid pump, or a fan.

[0011] Optionally, the inverter body includes at least: an IGBT module, a reactor, and a motherboard; the hot end of the heat dissipation component and the hot end of the heat conduction component are in contact with the IGBT module and / or the reactor, and a splash-proof guide plate and a water collection tank are provided below the contact area; the end of the guide slope of the splash-proof guide plate extends to the top of the water collection tank.

[0012] Optionally, it also includes a liquid level sensor, at least the detection end of which is located inside the water collection tank; the liquid level sensor is electrically connected to the controller.

[0013] This utility model provides a mine-use explosion-proof and intrinsically safe frequency converter. An explosion-proof plate is installed between the first and second cavities to block the propagation of an explosion, preventing internal explosions from causing mine accidents. The hot end of the heat dissipation component contacts the heat-generating element of the frequency converter body to fully dissipate heat, preventing high temperatures within the first cavity from inducing an explosion. A heat-conducting component is located within the first cavity, with its hot end in contact with the heat-generating element of the frequency converter body. The heat-conducting pipe's loop structure guides the hot fluid to the moisture-proof zone within the first cavity. While achieving heat dissipation, the heat from the frequency converter body's heat-generating element raises the temperature of the moisture-proof zone within the first cavity, preventing condensation. This design achieves a balance between explosion protection and moisture prevention during underground use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a top view schematic diagram of a mine explosion-proof and intrinsically safe frequency converter according to an embodiment of the present invention; Figure 2This is a cross-sectional schematic diagram of a mine explosion-proof and intrinsically safe frequency converter according to an embodiment of the present invention; In the diagram: 1. Main body; 2. First cavity; 3. Second cavity; 4. Inverter main body; 5. Heat dissipation assembly; 6. Explosion-proof plate. Detailed Implementation

[0016] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0017] It should be understood that the described embodiments are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of the embodiments of this utility model.

[0018] Example 1 See Figure 1 and Figure 2 ,like Figure 1 and Figure 2 As shown in the figure, this utility model embodiment provides a mine-use explosion-proof and intrinsically safe frequency converter, including: a body 1, a frequency converter main body 2, a controller (not shown in the figure), a heat dissipation component 3, and a heat conduction component (not shown in the figure); the body includes a first cavity 11 and a second cavity 12; an explosion-proof plate 4 is provided between the first cavity 11 and the second cavity 12; the heat dissipation component 3 is disposed outside the body 1, and the hot end of the heat dissipation component 3 is in contact with the heat-generating element of the frequency converter main body 2; the frequency converter main body 2 and the heat conduction component are disposed in the first cavity 11 and the second cavity 12. Inside cavity 11; the controller is electrically connected to the heat dissipation component 3 and the heat conduction component; wherein, the heat conduction component includes: a heat conduction pipe, the heat conduction pipe having a loop structure; a hot end of the heat conduction component, the hot end of the heat conduction component being in contact with the heat-generating element of the inverter body 2; a fluid driver, the fluid driver being disposed inside the heat conduction pipe and driving the fluid in the heat conduction pipe to flow from the hot end to the heat dissipation end; the fluid driver being electrically connected to the controller; and a first heat dissipation end, the first heat dissipation end being disposed in the moisture-proof zone inside the first cavity 11.

[0019] In this embodiment, an explosion-proof plate 4 is provided between the first cavity 11 and the second cavity 12 to prevent high temperatures or electrical sparks generated at the wiring connection points from leaking out and causing accidents in the mine. The main structure of the heat dissipation component 3 is located outside the first cavity 11, but not all of the structure of the heat dissipation component 3 is completely outside the first cavity 11. In order to ensure that the heat dissipation component 3 can fully dissipate heat from the heat-generating components of the inverter body 2, the hot end of the heat dissipation component 3 is in contact with the heat-generating components of the inverter body 2 to avoid high temperatures generated inside the first cavity 11 that could induce an explosion. The inverter body 2 is located inside the first cavity 11, and the explosion propagation is blocked by the wall of the first cavity 11 to prevent an underground accident caused by an explosion inside the first cavity 11. Due to the uneven heat distribution inside the first cavity 11, condensation may occur on the back of the inverter's main board or other circuit areas far away from the heat-generating components of the inverter body 2, as well as in the cable joint area. These areas in the first cavity 11 are prone to condensation, and condensation may cause short circuits. Areas with safety risks in other mines that need to be kept dry or free of condensation are called moisture-proof zones. Even if the moisture-proof zone and the heating element of the inverter body 2 are located in the same first cavity 11, some areas within the first cavity 11 may still experience condensation when the temperature is below the dew point. A heat-conducting component is placed inside the first cavity 11, with its hot end in contact with the heating element of the inverter body 2. The hot end of the heat-conducting component is a structure that extends out or protrudes from the heat-conducting pipe. The hot end of the heat-conducting component transfers the heat from the heating element of the inverter body 2 to the heat-conducting pipe. Using the loop structure of the heat-conducting pipe combined with the power of the fluid drive, the hot fluid is guided and pushed to the moisture-proof zone within the first cavity 11, where it is dissipated by the first heat dissipation end. The heat from the heating element of the inverter body 2 is used to raise the temperature of the moisture-proof zone, preventing moisture or condensation in the moisture-proof zone within the first cavity 11. This also prevents water droplets from dripping from the moisture-proof zone from causing malfunctions, short circuits, or sparks in surrounding electronic components.

[0020] In some embodiments, the main body of the heat dissipation component 3 is located outside the first cavity 11. At the same time, the explosion-proof performance of the inverter must be ensured. Therefore, the connection between the hot end of the heat dissipation component 3 and the heat-generating element inside the first cavity 11 is limited. The hot end of the heat dissipation component 3 is mainly located on the wall of the first cavity 11. In order to ensure the explosion-proof safety of the contact point between the hot end of the heat dissipation component 3 and the heat-generating element of the inverter body 2, a separate explosion-proof space is set at the contact point between the hot end of the heat dissipation component 3 and the heat-generating element of the inverter body 2, corresponding to the position inside and / or outside the first cavity 11, using the material of the explosion-proof plate 4, to isolate the hot end of the heat dissipation component 3 or the heat-generating element of the inverter body 2 from the surrounding environment, thereby ensuring the explosion-proof capability of the weak position on the wall of the first cavity 11 where the hot end of the heat dissipation component 3 contacts the heat-generating element of the inverter body 2.

[0021] In some embodiments, depending on the content of combustible gases underground in different types of mines, the first cavity 11 can be completely sealed by the explosion-proof plate 4 to form the first cavity 11, in order to more strictly block the propagation of the explosion.

[0022] In some embodiments, the heat pipe of the heat-conducting component can be connected in series with the fluid actuator to form a loop, or the fluid actuator can be placed inside the heat pipe, and then the two ends of the heat pipe can be sealed and connected to form a loop, so that the fluid actuator drives the fluid within the loop structure of the heat pipe, promotes the flow of the fluid within the heat pipe, changes the flow rate of the fluid within the heat pipe, and accelerates the transfer of heat from the heating element to other parts.

[0023] In some embodiments, the hot end of the heat dissipation component 3 and the hot end of the heat conduction component are arranged side by side and fixedly connected to the heating element of the inverter body 2. Different types and depths of mines have different requirements for heat dissipation and moisture prevention. When the hot end of the heat dissipation component 3 and the hot end of the heat conduction component are simultaneously in contact with the heating element of the inverter body 2, the hot ends of the heat dissipation component 3 and the heat conduction component are arranged side by side and fixedly connected to the heating element of the inverter body 2, each occupying a certain proportion. This allows the heat from the heating element of the inverter body 2 to be transferred to the outside of the first cavity 11 through the hot end of the heat dissipation component 3 for heat dissipation. Simultaneously, a portion of the heat from the inverter body 2 is used to raise the temperature of the moisture-proof zone inside the first cavity 11 to prevent condensation. The proportion of the contact area between the hot end of the heat dissipation component 3 and the hot end of the heat conduction component and the heating element of the inverter body 2 is set according to the different heat dissipation and moisture prevention requirements of different mines to achieve both heat dissipation and moisture prevention.

[0024] In some embodiments, the ratio of the contact area between the heating element of the inverter body 2 and the hot end of the heat dissipation component 3 to the contact area between the hot end of the heat conduction component is in the range of 19:1 to 3:2. When the hot end of the heat dissipation component 3 and the hot end of the heat conduction component are in parallel contact with the heating element of the inverter body 2, the heat of the heating element of the inverter body 2 is transferred out of the first cavity 11 through the hot end of the heat dissipation component 3. After the hot end of the heat conduction component guides the heat of the heating element of the inverter body 2 to the moisture-proof area, the actual heat is still in the first cavity 11. Therefore, it is necessary to ensure the balance between heat dissipation and moisture-proofing in the first cavity 11. Specifically, the ratio of the contact area between the heating element of the inverter body 2 and the hot end of the heat dissipation component 3 to the contact area between the hot end of the heat conduction component is set to 19:1 to 3:2 to ensure both heat dissipation and moisture-proofing in the first cavity 11, thereby achieving a balance between heat dissipation and moisture-proofing in the first cavity 11.

[0025] In some embodiments, the heat-conducting component further includes a second heat dissipation end; the second heat dissipation end is fixedly connected to the hot end of the heat dissipation component 3; while ensuring moisture protection within the first cavity 11, the heat-conducting component can lead out the second heat dissipation end and fix it to the hot end of the heat dissipation component 3, so that the heat generated by the heating element of the inverter body 2 can be transferred out of the first cavity 11 through the second heat dissipation end, thereby improving the heat dissipation effect within the first cavity 11 of the inverter; wherein, the hot end of the heat dissipation component 3 can be one or multiple.

[0026] In some embodiments, the heat pipe includes at least a first circuit and a second circuit; the first heat dissipation end is in the first circuit, and the second heat dissipation end is in the second circuit; both the first circuit and the second circuit are provided with a solenoid valve or a flow regulating valve, and the solenoid valve or the flow regulating valve is electrically connected to the controller; the first circuit is used to guide the heat of the heating element to the moisture-proof area for moisture protection, and the second circuit is used to transfer the heat of the heating element out of the first cavity 11 through the contact between the second heat dissipation end and the hot end of the heat dissipation assembly 3, thereby realizing heat dissipation within the first cavity 11; the controller controls the flow of the hot fluid in the first circuit and / or the second circuit of the heat pipe by controlling the solenoid valve or the flow regulating valve in the first circuit and the second circuit, thereby realizing the control of the heat absorbed by the heating element at the hot end of the heat-conducting assembly for moisture protection or heat dissipation.

[0027] In some embodiments, the inverter further includes a temperature sensor and a humidity sensor; the temperature sensor and the humidity sensor are electrically connected to the controller; the temperature sensor and the humidity sensor are disposed in the first cavity 11. When the temperature sensor detects that the temperature inside the first cavity 11 exceeds a specified temperature value, it controls the solenoid valve in the first circuit to close or relatively reduces the opening of the flow regulating valve in the first circuit, while simultaneously opening the solenoid valve in the second circuit or relatively increasing the opening of the flow regulating valve in the second circuit, so as to guide more fluid in the heat pipe to the hot end of the heat dissipation component 3, thereby achieving heat dissipation inside the first cavity 11; when the humidity ... reduce the opening of the flow regulating valve in the first circuit, while controlling the solenoid valve in the second circuit to close or relatively increase the opening of the flow regulating valve in the second circuit, so as to guide more fluid in the heat pipe to the hot end of the heat dissipation component 3, thereby achieving heat dissipation inside the first cavity 11; when the humidity sensor detects that the temperature inside the first cavity 11 exceeds a specified temperature value, it controls the solenoid valve in the first circuit to close or relatively reduce the opening of the flow regulating valve in the second circuit, so as to guide more fluid in the heat pipe to the hot end of the heat dissipation component 3, thereby achieving heat dissipation inside the first cavity 11. When the humidity inside chamber 11 exceeds a specified humidity value, the solenoid valve in the first circuit is opened or the opening of the flow regulating valve in the first circuit is relatively increased. At the same time, the solenoid valve in the second circuit is closed or the opening of the flow regulating valve in the second circuit is relatively decreased. This reduces the transfer of heat from the heating element outside the first chamber 11 and directs more heat from the heating element to the moisture-proof zone for moisture protection. The relative increase and decrease of the flow regulating valve opening refer to the opening size relative to the original opening. The specified temperature and humidity values ​​are specifically set according to the temperature and humidity conditions of different types and depths of mines, as well as the temperature and humidity conditions in the frequency converter.

[0028] It is understood that in some embodiments, in addition to the first and second circuits, there may be more circuits such as the third and fourth circuits, so as to use the heat of the heating element in the first cavity 11 for moisture protection or heat dissipation; there may also be multiple heat-conducting components in the first cavity 11, which are respectively disposed on different heating elements in the first cavity 11.

[0029] In some embodiments, the fluid actuator is an air pump, a liquid pump, or a fan; the fluid in the heat pipe of the heat-conducting component can be gas or liquid, and the flow rate requirement of the fluid in the heat pipe is also different depending on the heat dissipation requirements of different mines. Therefore, the fluid actuator can be an air pump, a liquid pump, or a fan. Combining the fluid actuator and the heat pipe circuit structure, the fluid actuator drives the fluid in the heat pipe to dissipate heat and / or prevent moisture.

[0030] In some embodiments, the inverter body 2 includes at least: an IGBT module, a reactor, and a motherboard; the hot end of the heat dissipation component 3 and the hot end of the heat conduction component are in contact with the IGBT module and / or the reactor, and a splash-proof guide plate and a water collection tank are provided below the contact area; the guide slope end of the splash-proof guide plate extends to the top of the water collection tank; the IGBT module and the reactor are the heat-generating components of the inverter body 2, so that the hot end of the heat dissipation component 3 and the hot end of the heat conduction component are in contact with the IGBT module and / or the reactor. Contact is made to achieve moisture protection and / or heat dissipation; at the contact points between the hot end of the heat dissipation component 3 and the hot end of the heat conduction component and the IGBT module and / or reactor, especially at the contact points between the hot end of the heat dissipation component 3 and the IGBT module and / or reactor, condensation may occur at the contact points due to the low temperature of the hot end of the heat dissipation component 3. Therefore, a splash-proof guide plate is provided below the contact points to prevent liquid from dripping and splashing onto surrounding electronic components or circuits, and the guide slope end of the splash-proof guide plate extends to the top of the water collection tank to collect the liquid.

[0031] In some embodiments, the IGBT module is located below the motherboard. This placement of the IGBT module below the motherboard serves two purposes: firstly, it prevents metal dust from settling, and secondly, it prevents condensation from dripping directly onto the IGBT module, which could cause short circuits or other malfunctions, or even lead to accidents.

[0032] In some embodiments, the inverter does not have only one heat-generating component. The IGBT module and the reactor are both heat-generating components of the inverter body 2. When the heat-generating component of the inverter body 2 is in contact with both the hot end of the heat dissipation component 3 and the hot end of the heat conduction component, the hot ends of the heat dissipation component 3 and the hot ends of the heat conduction component can be fixedly connected side by side to the heat-generating component of the inverter body 2 and distributed in a certain proportion. Alternatively, the hot ends of the heat dissipation component 3 and the hot ends of the heat conduction component can be connected to the IGBT module or the reactor respectively. In this case, it is not necessary to set the hot ends of the heat dissipation component 3 and the hot ends of the heat conduction component side by side on the same heat-generating component.

[0033] In some embodiments, a liquid level sensor is also included, with at least the detection end of the liquid level sensor located inside the water collection tank; the liquid level sensor is electrically connected to the controller; the liquid level in the water collection tank is detected by the liquid level sensor; an audible and visual alarm can also be set and electrically connected to the controller, which can trigger an alarm when the controller detects that the liquid level in the water collection tank has reached a specified value using the liquid level sensor, reminding staff to handle the liquid in the water collection tank.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this utility model and simplifying the description, and are not intended to 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 the embodiments of this utility model.

[0035] The above description is merely a specific implementation of the present utility model, but the protection scope of the present utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be determined by the scope of the claims.

Claims

1. A mine-use explosion-proof and intrinsically safe frequency converter, characterized in that, include: The main body, inverter body, controller, heat dissipation components, and heat conduction components; The body includes a first cavity and a second cavity; An explosion-proof plate is provided between the first cavity and the second cavity; The heat dissipation component is disposed outside the main body, and the hot end of the heat dissipation component is in contact with the heat-generating element of the inverter body; the inverter body and the heat-conducting component are disposed inside the first cavity; The controller is electrically connected to the heat dissipation component and the heat conduction component; The thermally conductive component includes: Heat pipe, wherein the heat pipe has a loop structure; The heat-conducting component has a hot end that is in contact with the heating element of the inverter body. A fluid actuator is disposed inside the heat pipe and drives the fluid in the heat pipe to flow from the hot end to the heat dissipation end; the fluid actuator is electrically connected to the controller. The first heat dissipation end is located in the moisture-proof zone inside the first cavity.

2. The frequency converter according to claim 1, characterized in that, The hot end of the heat dissipation component and the hot end of the heat conduction component are fixedly connected side by side to the heating element of the inverter body.

3. The frequency converter according to claim 2, characterized in that, The ratio of the contact area between the heat-generating component of the inverter body and the hot end of the heat dissipation component to the contact area between the hot end of the heat-conducting component is in the range of 19:1 to 3:

2.

4. The frequency converter according to claim 1, characterized in that, The heat-conducting component also includes a second heat dissipation end; the second heat dissipation end is fixedly connected to the hot end of the heat dissipation component.

5. The frequency converter according to claim 4, characterized in that, The heat pipe includes at least a first circuit and a second circuit; the first heat dissipation end is in the first circuit, and the second heat dissipation end is in the second circuit; both the first circuit and the second circuit are provided with a solenoid valve or a flow regulating valve, and the solenoid valve or the flow regulating valve is electrically connected to the controller.

6. The frequency converter according to claim 5, characterized in that, It also includes a temperature sensor and a humidity sensor; the temperature sensor and the humidity sensor are electrically connected to the controller.

7. The frequency converter according to claim 1, characterized in that, The fluid actuator is an air pump, a liquid pump, or a fan.

8. The frequency converter according to claim 1, characterized in that, The inverter body includes at least: an IGBT module, a reactor, and a motherboard; the hot end of the heat dissipation component and the hot end of the heat conduction component are in contact with the IGBT module and / or the reactor, and a splash-proof guide plate and a water collection tank are provided below the contact area; the end of the guide slope of the splash-proof guide plate extends to the top of the water collection tank.

9. The frequency converter according to claim 8, characterized in that, It also includes a liquid level sensor, at least the detection end of which is located inside the water collection tank; the liquid level sensor is electrically connected to the controller.

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