A distribution box

Abstract

The present invention provides a distribution box, including a box body, a box door, an isolation plate, a temperature-sensitive component and a transmission component. A vent is provided on the inner side wall of the box body, the isolation plate is slidably connected to the side wall of the vent, the temperature-sensitive component is fixedly installed in the inner cavity of the box body and is configured to expand and contract in the axial direction with the temperature change when the temperature is greater than a first preset temperature and less than a second preset temperature, the transmission component is configured to be transmission-connected with the temperature-sensitive component when the temperature is greater than the first preset temperature and less than the second preset temperature and sense the expansion and contraction change of the temperature-sensitive component to push the isolation plate to move to increase or reduce the ventilation area of ​​the vent, and to be separated from the temperature-sensitive component and push the isolation plate to move to close the vent when the temperature is greater than the second preset temperature. The present invention solves the problem that the existing distribution box cannot change the opening area of ​​the heat dissipation hole according to the change of the internal temperature to better perform heat dissipation processing, and cannot close the heat dissipation hole to isolate air circulation in the event of a fire.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and in particular to a distribution box. Background Art

[0002] The distribution box is a device that assembles switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to the requirements of electrical wiring to form a low-voltage power distribution device. The distribution box has the characteristics of small size, easy installation, special technical performance, fixed position, unique configuration function, no site restrictions, relatively common application, stable and reliable operation, high space utilization, and small footprint. It is the control center that directs the reasonable distribution of electric energy among various components in the power supply line, the control link that reliably receives the upper power supply and correctly feeds out the load electric energy, and is also the key to obtaining the user's satisfaction with the power supply quality.

[0003] When the electronic components inside the distribution box are working, a lot of heat will be generated. If the heat is not dissipated in time, it is easy to affect the working performance of the electronic components inside the distribution box, and in serious cases, it will cause a fire. The existing distribution box generally dissipates heat through the heat dissipation holes opened on the side wall of the box. It cannot change the opening area of ​​the heat dissipation holes according to the changes in the internal temperature to better dissipate heat, nor can it close the heat dissipation holes to isolate air circulation when a fire occurs in the distribution box. The structure needs to be improved. Summary of the invention

[0004] Based on this, in order to solve the problem that the existing distribution box cannot change the opening area of ​​the heat dissipation holes according to the change of the internal temperature to better dissipate heat, and cannot close the heat dissipation holes to isolate air circulation when a fire occurs in the distribution box, the present invention provides a distribution box, and its specific technical solution is as follows:

[0005] A distribution box comprises a box body, a box door, an isolation plate, a temperature-sensitive component and a transmission component. The box door is hinged on one side of an opening of the box body, and a vent is provided on the inner side wall of the box body.

[0006] The isolation plate is slidably connected to the side wall of the vent.

[0007] The temperature-sensitive component is fixedly installed in the inner cavity of the box body and is configured to expand and contract along the axial direction as the temperature changes when the temperature is greater than a first preset temperature and less than a second preset temperature.

[0008] The transmission component is configured to be transmission-connected with the temperature-sensitive component when the temperature is greater than a first preset temperature and less than a second preset temperature, and to sense the expansion and contraction changes of the temperature-sensitive component to push the isolation plate to move to increase or decrease the ventilation area of ​​the vent, and to be disengaged from the temperature-sensitive component and push the isolation plate to move to close the vent when the temperature is greater than the second preset temperature.

[0009] When the air temperature inside the distribution box gradually increases and is greater than the first preset temperature and less than the second preset temperature, the temperature-sensitive component expands and contracts along its axial direction, driving the transmission component to move to push the isolation plate to slide along the inner wall of the vent, thereby increasing the ventilation area of ​​the vent, thereby increasing the air circulation speed in the inner cavity of the distribution box to better dissipate heat in the inner cavity of the distribution box, thereby effectively reducing the internal temperature of the distribution box.

[0010] At the same time, when the air temperature inside the distribution box is lower than the first preset temperature, the ventilation area of ​​the vent remains unchanged, and the heat dissipation of the distribution box is performed to ensure that the working temperature of the distribution box is normal, while reducing the entry of dust into the distribution box and preventing dust from affecting the working performance of the working components inside the distribution box.

[0011] When the air temperature inside the distribution box is greater than the second preset temperature (i.e. a fire occurs), the transmission component disengages from the temperature-sensitive component and pushes the isolation plate to slide along the side wall of the vent to close the vent, thereby isolating the air circulation inside the distribution box, assisting in fire extinguishing, and avoiding burning of electrical components inside the distribution box.

[0012] To summarize, the distribution box can increase the ventilation area of ​​the vents when the internal air temperature gradually rises and is greater than the first preset temperature and less than the second preset temperature, so as to effectively ventilate and dissipate heat to the inner cavity of the distribution box. It can also close the vents to isolate air circulation and assist in fire extinguishing when a fire occurs inside. This solves the problem that the existing distribution box cannot change the opening area of ​​the heat dissipation holes according to changes in the internal temperature to better dissipate heat, and cannot close the heat dissipation holes to isolate air circulation when a fire occurs in the distribution box.

[0013] Furthermore, the distribution box also includes a resistor bar, a probe and a control module.

[0014] The resistance bar is fixedly mounted on the inner wall of the box body through an insulating isolation layer.

[0015] One end of the probe is electrically connected to the resistor bar and is configured to slide along the length direction of the resistor bar as the temperature-sensitive component expands and contracts or the transmission component moves.

[0016] The control module is electrically connected to one end of the resistor bar and one end of the probe through an electrical conductor.

[0017] Furthermore, the temperature-sensitive component includes a storage box and a push rod.

[0018] The storage box is provided with a sealed chamber and the sealed chamber is filled with a preset volume of a temperature-sensitive medium.

[0019] The push rod at least partially extends into the sealed chamber and is slidably and sealingly connected to the side wall of the sealed chamber.

[0020] Furthermore, the transmission component includes a transmission rod and an elastic component.

[0021] One end of the transmission rod is transmission-connected to the push rod, and the other end is fixedly connected to one end of the isolation plate.

[0022] One end of the elastic component is fixedly connected to the other end of the isolation plate, and the other end is fixedly connected to the inner wall of the box body.

[0023] Furthermore, the transmission component also includes a temperature-sensitive glass ball.

[0024] One end of the temperature-sensitive glass ball is fixedly connected to one end of the transmission rod, and the other end is fixedly connected to the push rod.

[0025] Furthermore, the temperature-sensitive medium is a mixture of paraffin and lubricating oil.

[0026] Furthermore, the temperature-sensitive medium is paraffin.

[0027] Furthermore, the elastic component is a coil spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0029] Figure 1 This is a schematic diagram of the overall structure of a distribution box in one embodiment of the present invention. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of the overall structure of a distribution box in one embodiment of the present invention. Figure 2 ;

[0031] Figure 3 Schematic diagram of the structural relationship between the resistor bar, probe and temperature sensitive component of a distribution box in one embodiment of the present invention Figure 1 ;

[0032] Figure 4 The schematic diagram is a schematic diagram of the structural relationship between the resistor bar, the probe and the transmission component of a distribution box in one embodiment of the present invention. Figure 2 .

[0033] Description of reference numerals:

[0034] 1. Box body; 2. Box door; 3. Isolation plate; 4. Temperature-sensitive component; 5. Transmission component; 6. Storage box; 7. Push rod; 8. Transmission rod; 9. Elastic component; 10. Resistance strip; 11. Probe. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0038] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0039] like Figure 1 as well as Figure 2 As shown, a distribution box in one embodiment of the present invention includes a box body 1, a box door 2, an isolation plate 3, a temperature-sensitive component 4 and a transmission component 5, the box door 2 is hinged on the opening side of the box body 1, and a ventilation hole is provided on the inner wall of the box body 1.

[0040] The isolation plate 3 is slidably connected to the side wall of the vent. When the isolation plate 3 slides along the side wall of the vent, the area of ​​the vent can be increased or decreased. Preferably, the isolation plate 3 is slidably and hermetically connected to the side wall of the vent, and when the isolation plate 3 closes the vent, the inside of the distribution box is isolated from the outside air.

[0041] The temperature-sensitive component 4 is fixedly installed in the inner cavity of the box body 1, and is configured to expand and contract in the axial direction as the temperature changes when the temperature is greater than a first preset temperature and less than a second preset temperature. The first preset temperature is less than the second preset temperature, and the first preset temperature and the second preset temperature can be set according to actual conditions, and the corresponding temperature-sensitive component 4 is selected according to the first preset temperature and the second preset temperature.

[0042] The transmission component 5 is configured to be transmission-connected with the temperature-sensitive component 4 when the temperature is greater than the first preset temperature and less than the second preset temperature, and to sense the expansion and contraction changes of the temperature-sensitive component 4 to push the isolation plate 3 to move to increase or decrease the ventilation area of ​​the vent, and to be disengaged from the temperature-sensitive component 4 and push the isolation plate 3 to move to close the vent when the temperature is greater than the second preset temperature.

[0043] When the air temperature inside the distribution box gradually increases and is greater than the first preset temperature and less than the second preset temperature, the temperature-sensitive component 4 expands and contracts along its axial direction, driving the transmission component 5 to move to push the isolation plate 3 to slide along the inner wall of the vent, thereby increasing the ventilation area of ​​the vent, thereby increasing the air circulation speed in the inner cavity of the distribution box to better dissipate heat in the inner cavity of the distribution box, and effectively reducing the internal temperature of the distribution box.

[0044] At the same time, when the air temperature inside the distribution box is lower than the first preset temperature, the ventilation area of ​​the vent remains unchanged, and the heat dissipation of the distribution box is performed to ensure that the working temperature of the distribution box is normal, while reducing the entry of dust into the distribution box and preventing dust from affecting the working performance of the working components inside the distribution box.

[0045] When the air temperature inside the distribution box is greater than the second preset temperature (i.e. a fire occurs), the transmission component 5 disengages from the temperature-sensitive component 4 and pushes the isolation plate 3 to slide along the side wall of the vent to close the vent, thereby isolating the air circulation inside the distribution box, assisting in extinguishing the fire, and avoiding burning of electrical components inside the distribution box.

[0046] To summarize, the distribution box can increase the ventilation area of ​​the vents when the internal air temperature gradually rises and is greater than the first preset temperature and less than the second preset temperature, so as to effectively ventilate and dissipate heat to the inner cavity of the distribution box. It can also close the vents to isolate air circulation and assist in fire extinguishing when a fire occurs inside. This solves the problem that the existing distribution box cannot change the opening area of ​​the heat dissipation holes according to changes in the internal temperature to better dissipate heat, and cannot close the heat dissipation holes to isolate air circulation when a fire occurs in the distribution box.

[0047] In one embodiment, if Figure 3 as well as Figure 4As shown, the distribution box also includes a resistor bar 10, a probe 11 and a control module.

[0048] The resistance bar 10 is fixedly mounted on the inner wall of the box 1 through an insulating isolation layer, and one end of the probe 11 is electrically connected to the resistance bar 10 and is configured to slide along the length direction of the resistance bar 10 with the expansion and contraction change of the temperature sensitive component 4 or the movement of the transmission component 5.

[0049] The control module is electrically connected to one end of the resistor bar 10 and one end of the probe 11 through an electrical conductor.

[0050] Specifically, the control module includes a current unit and a voltage unit, wherein the current unit is used to measure the current value flowing through the resistor bar 10, and the voltage unit is used to measure the voltage value between one end of the resistor bar 10 and one end of the probe 11. The control module calculates the resistance value between one end of the resistor bar 10 and one end of the probe 11 according to the current value and the voltage value. The other end of the probe 11 is fixedly connected to the push rod 7 of the temperature-sensitive component 4 or the transmission rod 8 of the transmission component 5.

[0051] In actual application, multiple marking points can be set on the resistor bar 10 first, and then the temperature-sensitive component 4 can be heated and the isolation plate 3 can be gradually pushed to adjust the ventilation area of ​​the vent, so that one end of the probe 11 can slide along the length direction of the resistor bar 10. At the same time, when the probe 11 is electrically connected to different marking points on the resistor bar 10, the resistance value between one end of the resistor bar 10 and one end of the probe 11 and the corresponding temperature value of the temperature-sensitive component 4 are measured. Finally, a comparison table is constructed according to the resistance values ​​and temperature values ​​corresponding to different marking points.

[0052] In this way, the control module and the probe 11 measure the resistance value between one end of the resistor bar 10 and one end of the probe 11, and the air temperature inside the distribution box can be measured according to the constructed comparison transformer and the resistance value. The combination of the resistor bar 10, the probe 11, the control module, the temperature-sensitive component 4, the transmission component 5 and the isolation plate 3 can not only solve the problem that the existing distribution box cannot change the opening area of ​​the heat dissipation hole according to the change of the internal temperature to better dissipate heat, and cannot close the heat dissipation hole to isolate air circulation when a fire occurs in the distribution box, but also can measure the air temperature inside the distribution box, and has the characteristics of simple and ingenious structure.

[0053] In one embodiment, if Figure 2 As shown, the temperature-sensitive component 4 includes a storage box 6 and a push rod 7 .

[0054] The storage box 6 is provided with a sealed chamber filled with a preset volume of a temperature-sensitive medium. The push rod 7 at least partially extends into the sealed chamber and is slidably and sealedly connected to the side wall of the sealed chamber.

[0055] Specifically, the temperature-sensitive medium is paraffin or a mixture of paraffin and lubricating oil, and the storage box 6 is made of aluminum alloy or copper or other metals with good thermal conductivity, so that the paraffin in the sealed chamber can better sense the temperature of the air inside the distribution box. Since the volume expansion rate of paraffin can reach 13.2% when the temperature rises from 25 degrees Celsius to 61 degrees Celsius under a pressure of 0.36MPa, and the volume expansion rate changes in a good linear law with the temperature, by filling the sealed chamber of the storage box 6 with paraffin or a mixture of paraffin and lubricating oil, the temperature change of the distribution box can be sensed by the paraffin and the push rod 7 can be pushed to expand and contract along the axis of the push rod 7, thereby pushing the isolation plate 3 to move to change the ventilation area of ​​the vent.

[0056] By adjusting the volume of paraffin or the ratio of paraffin to lubricating oil and the total volume, the first preset temperature and the second preset temperature can be adjusted and set as needed, which will not be described in detail here.

[0057] In one embodiment, if Figure 2 As shown, the transmission component 5 includes a transmission rod 8 and an elastic component 9.

[0058] One end of the transmission rod 8 is transmission-connected to the push rod 7, and the other end is fixedly connected to one end of the isolation plate 3. One end of the elastic component 9 is fixedly connected to the other end of the isolation plate 3, and the other end is fixedly connected to the inner wall of the box body 1.

[0059] Specifically, the transmission component 5 further includes a temperature-sensitive glass ball, and the elastic component 9 is a coil spring. One end of the temperature-sensitive glass ball is fixedly connected to one end of the transmission rod 8, and the other end is fixedly connected to the push rod 7. That is, the transmission rod 8 is transmission-connected to the push rod 7 through the temperature-sensitive glass ball.

[0060] The response temperature of the temperature-sensitive glass ball is greater than the second preset temperature. When the air temperature inside the distribution box is greater than the second preset temperature and reaches the response temperature of the temperature-sensitive glass ball, the temperature-sensitive glass ball cracks and disconnects the transmission component 5 from the temperature-sensitive component 4. At this time, under the elastic force of the elastic component 9, the isolation plate 3 slides along the side wall of the vent and closes the vent, which can isolate the inside of the distribution box from the outside air.

[0061] The response temperature of the temperature-sensitive glass ball can be selected according to actual needs, which will not be described in detail here.

[0062] Through the transmission rod 8, the temperature-sensitive glass ball and the elastic component 9, the transmission component 5 can be configured to be transmission-connected with the temperature-sensitive component 4 when the temperature is greater than the first preset temperature and less than the second preset temperature, and to sense the expansion and contraction changes of the temperature-sensitive component 4 to push the isolation plate 3 to move to increase or decrease the ventilation area of ​​the vent, and to disengage from the temperature-sensitive component 4 and push the isolation plate 3 to move to close the vent when the temperature is greater than the second preset temperature.

[0063] In one embodiment, one of the side walls of the storage box 6 is made of a fusible alloy having a melting point greater than a second preset temperature, and the temperature-sensitive medium is a mixture of paraffin and expandable graphite, and the initial expansion temperature of the expandable graphite is greater than the second preset temperature and greater than the melting point of the fusible alloy.

[0064] In this way, by setting the temperature-sensitive medium as a mixture of paraffin and expandable graphite, not only can the air temperature inside the distribution box be sensed to push the isolation plate 3 through the transmission component 5, thereby increasing the ventilation area of ​​the vent, but also the vent can be closed when a fire occurs inside the distribution box to isolate the air circulation and allow the expandable graphite in the storage box 6 to expand when exposed to fire, so as to extinguish the fire inside the distribution box through dual means.

[0065] Of course, the push rod 7 can also be made of a fusible alloy with a melting point greater than the second preset temperature. In this way, when a fire occurs in the distribution box and the vents are closed to isolate the air circulation in the distribution box and the fire inside the distribution box cannot be extinguished, the push rod 7 will be heated and melted, and the expandable graphite temperature will be greater than the initial expansion temperature and expand, and will be squeezed out into the distribution box through the through hole between the side wall of the storage box 6 and the push rod 7 to play a role in flame retardancy and fire extinguishing.

[0066] In addition, since the through hole between the side wall of the storage box 6 and the push rod 7 opens toward the vent, the expandable graphite that expands and surges out of the sealed chamber of the storage box 6 will also fill and seal the gap between the vent and the isolation plate 3, thereby avoiding the problem that the isolation plate 3 and the side wall of the vent are not tightly sealed, resulting in the inability to effectively isolate the air flow in the distribution box, and thus the inability to effectively extinguish the flame.

[0067] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A distribution box, comprising a box body and a box door, wherein the box door is hinged on an opening side of the box body, and a vent is provided on the inner side wall of the box body, characterized in that: The distribution box also includes: an isolation plate slidably connected to the side wall of the vent; A temperature-sensitive component, fixedly mounted in the inner cavity of the box, and configured to expand and contract in the axial direction as the temperature changes when the temperature is greater than a first preset temperature and less than a second preset temperature; a transmission component, configured to be transmission-connected with the temperature-sensitive component when the temperature is greater than a first preset temperature and less than a second preset temperature, and to sense the expansion and contraction change of the temperature-sensitive component to push the isolation plate to move so as to increase or decrease the ventilation area of ​​the vent, and to be disengaged from the temperature-sensitive component and push the isolation plate to move so as to close the vent when the temperature is greater than the second preset temperature; The distribution box also includes: A resistance bar, fixedly mounted on the inner wall of the box through an insulating isolation layer; A probe, one end of which is electrically connected to the resistor bar and is configured to slide along the length direction of the resistor bar as the temperature-sensitive component changes in expansion and contraction or the transmission component moves; A control module, electrically connected to one end of the resistor bar and one end of the probe through an electrical conductor; The control module includes a current unit and a voltage unit, the current unit is used to measure the current value flowing through the resistor bar, and the voltage unit is used to measure the voltage value between one end of the resistor bar and one end of the probe, and the control module calculates the resistance value between one end of the resistor bar and one end of the probe according to the current value and the voltage value; First, set multiple marking points on the resistor bar, then heat the temperature-sensitive component and gradually push the isolation plate to adjust the ventilation area of ​​the vent, so that one end of the probe slides along the length direction of the resistor bar. At the same time, measure the resistance value between one end of the resistor bar and one end of the probe when the probe is electrically connected to different marking points on the resistor bar, as well as the corresponding temperature value of the temperature-sensitive component. Finally, construct a comparison table based on the resistance values ​​and temperature values ​​corresponding to different marking points.

2. A distribution box as claimed in claim 1, characterized in that: The temperature-sensitive component comprises: A storage box, provided with a sealed chamber and the sealed chamber is filled with a preset volume of a temperature-sensitive medium; The push rod at least partially extends into the sealed chamber and is slidably and sealingly connected to the side wall of the sealed chamber.

3. A distribution box as claimed in claim 2, characterized in that: The transmission components include: A transmission rod, one end of which is transmission-connected to the push rod, and the other end of which is fixedly connected to one end of the isolation plate; The elastic component has one end fixedly connected to the other end of the isolation plate, and the other end fixedly connected to the inner wall of the box body.

4. A distribution box as claimed in claim 3, characterized in that: The transmission component also includes: One end of the temperature-sensitive glass ball is fixedly connected to one end of the transmission rod, and the other end is fixedly connected to the push rod.

5. A distribution box as claimed in claim 2, characterized in that: The temperature-sensitive medium is a mixture of paraffin and lubricating oil.

6. A distribution box as claimed in claim 2, characterized in that: The temperature sensitive medium is paraffin.

7. A distribution box as claimed in claim 3, characterized in that: The elastic component is a coil spring.

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