Heat dissipation structure for frame circuit breaker drawing rack

Abstract

The utility model relates to the technical field of circuit breaker production, in particular to a heat dissipation structure for a drawing frame of a frame circuit breaker, which is reasonable in structural design and mainly comprises a drawing frame, a connecting plate, a current-carrying copper bar, a touch plate, a supporting frame, a transverse plate spring, a longitudinal plate spring, a heat dissipation fan and a heat dissipation air pipe. A drawing frame body of the drawing frame is provided with a first installation groove facilitating installation of a current-carrying copper bar and a touch panel, a second installation groove facilitating installation of a heat dissipation fan and a heat dissipation air pipe, a cylindrical horizontal heat dissipation through hole used for assisting heat dissipation and a Y-shaped heat dissipation through hole, and the current-carrying copper bar and the touch panel are fixed to the drawing frame through a connecting plate. Meanwhile, the touch panel is provided with a transverse plate spring and a longitudinal plate spring through a supporting frame, the touch panel can be actively and efficiently cooled through a cooling fan and a cooling air pipe, meanwhile, the drawing frame, the current-carrying copper bar and the touch panel are provided with auxiliary cooling holes or cooling grooves, and the overall cooling effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker production, in particular to a heat dissipation structure for a frame circuit breaker drawer. Background Art

[0002] Circuit breakers are one of the most important components in low-voltage power grids. Small and medium-sized frame circuit breakers are particularly common in low-voltage distribution cabinets. With the miniaturization and intelligent development of low-voltage distribution cabinets, the overall volume of distribution cabinets is getting smaller and smaller, and the density of small frames is getting higher and higher. Therefore, low-voltage switchgear manufacturers have put forward higher requirements on the temperature rise of the output terminals of frame circuit breakers. It is necessary to meet the requirement that frame circuit breakers do not reduce their capacity in high-temperature environments. This is particularly important in some occasions with higher ambient temperature requirements.

[0003] To this end, patent document CN214797181U discloses a heat dissipation structure device for a frame circuit breaker drawer, comprising a drawer base mounted on the frame circuit breaker, with multiple current-carrying copper bars disposed within the drawer base. L-shaped fixing plates are fixedly mounted on the top and bottom of the current-carrying copper bars, with two threaded seats symmetrically welded to one side of the L-shaped fixing plate. A single aluminum alloy heat sink is fixedly mounted on one side of each L-shaped fixing plate, and limit plates are disposed above and below the current-carrying copper bars. The device has a compact structure. When the current-carrying copper bars are operating normally and carrying current, heat is generated. This heat is transferred to the heat sink through the L-shaped fixing plates for dissipation and cooling. Activating a micro-fan accelerates the heat dissipation from the heat sink through the elliptical heat dissipation holes in the drawer base, reducing internal heat accumulation and allowing the frame circuit breaker product to have a greater temperature rise margin during use, meeting the requirement for maintaining the capacity of the frame circuit breaker in high-temperature environments.

[0004] However, this heat dissipation structure for frame circuit breaker drawers has been found to have shortcomings during use. First, it cannot actively and efficiently dissipate heat from the contacts; second, the heat dissipation effect of the contacts themselves is not ideal. Therefore, it is necessary to optimize and improve the connection structure between the traditional circuit breaker busbar and contacts. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned problems existing in the traditional technology and provide a heat dissipation structure for a frame circuit breaker drawer.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A heat dissipation structure for a frame circuit breaker chassis, comprising a chassis, a connecting plate, a current-carrying copper bus, a contact plate, a support frame, a transverse leaf spring, a longitudinal leaf spring, a heat dissipation fan and a heat dissipation air duct;

[0008] The chassis comprises a chassis body, wherein the chassis body has two rows of first mounting slots formed in a central portion, and two rows of second mounting slots formed symmetrically at upper and lower ends of the chassis body, wherein vertical air guides are connected between the first mounting slots and corresponding second mounting slots, and wherein an area of ​​the chassis body between the two rows of second mounting slots has cylindrical horizontal heat dissipation holes formed at equal intervals in a horizontal direction, and an area of ​​the chassis body between two adjacent cylindrical horizontal heat dissipation holes has a Y-shaped heat dissipation hole formed by connecting two first heat dissipation slots and one second heat dissipation slot;

[0009] The first mounting slot connects the current-carrying copper busbar and the front of the touch panels located on both sides of the current-carrying copper busbar via fasteners penetrating the upper and lower symmetrically distributed connecting plates. The rear of the touch panels on both sides are jointly mounted with a transverse leaf spring and a longitudinal leaf spring via a bracket. The longitudinal leaf spring is located between the transverse leaf spring and the touch panels.

[0010] A heat dissipation fan is installed in the second installation slot. The air suction end of the heat dissipation fan is connected to the vertical air guide port via a heat dissipation air duct. The vertical air guide port is located close to the rear of the corresponding touch panel.

[0011] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, a mounting hole for facilitating installation of a fastener is provided on the front bottom end surface of the drawer body located in the second mounting slot.

[0012] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, a first mounting hole for cooperating with a fastener is provided in the middle of the current-carrying copper busbar, and a columnar vertical heat dissipation through-hole is provided in the front of the current-carrying copper busbar for auxiliary heat dissipation.

[0013] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, step grooves are provided on the upper and lower sides of the current-carrying copper busbar for easy connection with the touch panel.

[0014] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, the front of the touch plate is provided with a second mounting hole for matching with the fastener, and the rear of the touch plate and the longitudinal leaf spring are respectively provided with comb-shaped heat dissipation slots for facilitating ventilation and heat dissipation.

[0015] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, the support frame can provide an internal support force from the inner side of the contact plates on both sides, and at the same time, the support frame can provide an external pressure from the outer side of the transverse leaf springs on both sides.

[0016] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, the connecting plate is an L-shaped plate, and the contact surface of the connecting plate abutting against the touch plate is coated with thermal grease.

[0017] Furthermore, in the heat dissipation structure for the frame circuit breaker drawer, the fastener is a long-rod bolt.

[0018] The beneficial effects of the utility model are:

[0019] The utility model has a reasonable structural design and is mainly composed of a drawer, a connecting plate, a current-carrying copper bus, a touch panel, a support frame, a transverse leaf spring, a longitudinal leaf spring, a heat dissipation fan and a heat dissipation duct. The drawer body is provided with a first mounting groove for facilitating the installation of the current-carrying copper bus and the touch panel, a second mounting groove for facilitating the installation of the heat dissipation fan and the heat dissipation duct, and a columnar horizontal heat dissipation through-hole and a Y-shaped heat dissipation through-hole for auxiliary heat dissipation. The current-carrying copper bus and the touch panel are fixed to the drawer by means of the connecting plate. At the same time, the touch panel is installed with a transverse leaf spring and a longitudinal leaf spring by means of the support frame. The heat dissipation fan and the heat dissipation duct can be used to actively and efficiently dissipate heat for the touch panel. At the same time, the drawer, the current-carrying copper bus and the touch panel themselves are also provided with auxiliary heat dissipation holes or heat dissipation grooves, so that the overall heat dissipation effect is good.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the above advantages at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from one angle;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from another angle;

[0024] Figure 3 This is a schematic diagram of the rear view structure of the entire utility model;

[0025] Figure 4 This is a schematic diagram of the main structure of the utility model as a whole;

[0026] Figure 5 This is a schematic diagram of the assembly structure of the current-carrying copper bus and the contact plate in the utility model;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the drawer in the utility model at one angle;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the drawer in the utility model from another angle;

[0029] Figure 8 This is a schematic diagram of the top view of the drawer frame of the utility model;

[0030] In the accompanying drawings, the components represented by the reference numerals are described as follows:

[0031] 1-bracket, 101-bracket body, 102-first mounting slot, 103-second mounting slot, 104-vertical air guide, 105-columnar horizontal heat dissipation hole, 106-first heat dissipation slot, 107-second heat dissipation slot, 108-mounting hole, 2-connecting plate, 3-current-carrying copper bus, 4-touch plate, 5-support frame, 6-transverse leaf spring, 7-longitudinal leaf spring, 8-columnar vertical heat dissipation hole, 9-comb-shaped heat dissipation slot, 10-cooling fan, 11-cooling air duct. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figures 1-8 As shown, this embodiment provides a heat dissipation structure for a frame circuit breaker chassis, including a chassis 1, a connecting plate 2, a current-carrying copper bus 3, a contact plate 4, a support frame 5, a transverse leaf spring 6, a longitudinal leaf spring 7, a heat dissipation fan 10 and a heat dissipation air duct 11.

[0034] In this embodiment, the drawer 1 includes a drawer body 101, which has two rows of first mounting slots 102 in the middle of the drawer body 101, and two rows of second mounting slots 103 symmetrically formed at the upper and lower ends of the drawer body 101. Vertical air guides 104 are connected between the first mounting slots 102 and the corresponding second mounting slots 103. The area of ​​the drawer body 101 between the two rows of second mounting slots 103 is provided with cylindrical horizontal heat dissipation holes 105 equidistantly in the horizontal direction. The area of ​​the drawer body 101 between two adjacent cylindrical horizontal heat dissipation holes 105 is provided with Y-shaped heat dissipation holes. The Y-shaped heat dissipation holes are formed by connecting two first heat dissipation slots 106 and one second heat dissipation slot 107. The second heat dissipation slots 107 of each Y-shaped heat dissipation hole are independent of each other or connected as one.

[0035] In this embodiment, the first mounting groove 106 connects the current-carrying copper bus 3 and the front of the touch plates 4 located on both sides of the current-carrying copper bus 3 through fasteners that pass through the upper and lower symmetrically distributed connecting plates 2. The rear parts of the touch plates 4 on both sides are jointly installed with a transverse leaf spring 6 and a longitudinal leaf spring 7 through a support frame 5. The longitudinal leaf spring 7 is located between the transverse leaf spring 6 and the touch plate 4.

[0036] In this embodiment, a cooling fan 10 is installed in the second installation slot 107 . The air suction end of the cooling fan 10 is connected to the vertical air guide 104 via the cooling air duct 11 . The vertical air guide 104 is located close to the rear of the corresponding touch panel 4 .

[0037] In this embodiment, a mounting hole 108 for facilitating installation of a fastener is formed on the front bottom surface of the drawer body 101 located at the second mounting slot 103 .

[0038] In this embodiment, a first mounting hole for a fastener is provided in the middle of the current-carrying copper busbar 3, and a cylindrical vertical heat dissipation hole 8 is provided in the front of the current-carrying copper busbar 3 to facilitate heat dissipation. Step grooves are provided on the upper and lower sides of the current-carrying copper busbar 3 to facilitate engagement with the contact plate 4.

[0039] In this embodiment, a second mounting hole for cooperating with a fastener is provided at the front of the touch panel 4 , and comb-shaped heat dissipation slots 9 for facilitating ventilation and heat dissipation are provided at the rear of each of the touch panel 4 and the longitudinal leaf spring 7 .

[0040] In this embodiment, the support frame 5 can provide an internal support force from the inner side of the touch plates 4 on both sides, and at the same time, the support frame 5 can provide an external pressure from the outer side of the transverse leaf springs 6 on both sides.

[0041] In this embodiment, the connecting plate 2 is an L-shaped plate, and the contact surface of the connecting plate 2 that abuts against the touch plate 4 is coated with thermal conductive silicone grease.

[0042] In this embodiment, the fastener is a long-rod bolt.

[0043] A specific application of this embodiment is as follows: the heat dissipation structure of the frame circuit breaker chassis mainly includes a chassis 1, a connecting plate 2, a current-carrying copper busbar 3, a touch plate 4, a support frame 5, a transverse leaf spring 6, a longitudinal leaf spring 7, a cooling fan 10, and a cooling air duct 11. The chassis body 101 of the chassis 1 is provided with a first mounting groove 102 for facilitating the installation of the current-carrying copper busbar 3 and the touch plate 4, a second mounting groove 103 for facilitating the installation of the cooling fan 10 and the cooling air duct 11, and columnar horizontal cooling through-holes 105 and Y-shaped cooling through-holes for auxiliary heat dissipation. The current-carrying copper busbar 3 and the touch plate 4 are fixed to the chassis 1 using the connecting plate 2. At the same time, the touch plate 4 is mounted with a transverse leaf spring 6 and a longitudinal leaf spring 7 using the support frame 5. The cooling fan 10 and the cooling air duct 11 can actively and efficiently dissipate heat for the touch plate 4. At the same time, the chassis 1, the current-carrying copper busbar 3, and the touch plate 4 themselves are also provided with auxiliary heat dissipation holes or heat dissipation grooves, resulting in a good overall heat dissipation effect.

[0044] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A heat dissipation structure for a frame circuit breaker chassis, characterized in that: It includes a chassis, a connecting plate, a current-carrying copper bus, a contact plate, a support frame, a transverse leaf spring, a longitudinal leaf spring, a cooling fan and a cooling air duct; The chassis comprises a chassis body, wherein the chassis body has two rows of first mounting slots formed in a central portion, and two rows of second mounting slots formed symmetrically at upper and lower ends of the chassis body, wherein vertical air guides are connected between the first mounting slots and corresponding second mounting slots, and wherein an area of ​​the chassis body between the two rows of second mounting slots has cylindrical horizontal heat dissipation holes formed at equal intervals in a horizontal direction, and an area of ​​the chassis body between two adjacent cylindrical horizontal heat dissipation holes has a Y-shaped heat dissipation hole formed by connecting two first heat dissipation slots and one second heat dissipation slot; The first mounting slot connects the current-carrying copper busbar and the front of the touch panels located on both sides of the current-carrying copper busbar via fasteners penetrating the upper and lower symmetrically distributed connecting plates. The rear of the touch panels on both sides are jointly mounted with a transverse leaf spring and a longitudinal leaf spring via a bracket. The longitudinal leaf spring is located between the transverse leaf spring and the touch panels. A cooling fan is installed in the second mounting slot, and an air suction end of the cooling fan is connected to a vertical air guide port via a cooling air duct, and the vertical air guide port is located near the rear of the corresponding touch panel; A first mounting hole cooperating with a fastener is provided in the middle of the current-carrying copper busbar, and a columnar vertical heat dissipation through-hole is provided at the front of the current-carrying copper busbar to facilitate auxiliary heat dissipation; a second mounting hole cooperating with a fastener is provided at the front of the touch plate, and a comb-shaped heat dissipation slot is provided at the rear of each of the touch plate and the longitudinal leaf spring to facilitate ventilation and heat dissipation.

2. The heat dissipation structure for a frame circuit breaker chassis according to claim 1, characterized in that: The front bottom end surface of the drawer body located in the second installation slot is provided with an installation hole for facilitating the installation of a fastener.

3. The heat dissipation structure for a frame circuit breaker chassis according to claim 2, characterized in that: The upper and lower sides of the current-carrying copper bus are provided with step grooves for easy connection with the touch panel.

4. The heat dissipation structure for a frame circuit breaker chassis according to claim 3, characterized in that: The support frame can provide an inner supporting force from the inner side of the contact plates on both sides, and at the same time, the support frame can provide an outer pressure from the outer side of the transverse leaf springs on both sides.

5. The heat dissipation structure for a frame circuit breaker chassis according to claim 4, characterized in that: The connecting plate is an L-shaped plate, and the contact surface of the connecting plate that abuts against the touch plate is coated with thermal conductive silicone grease.

6. The heat dissipation structure for a frame circuit breaker chassis according to claim 5, characterized in that: The fastener is a long-rod bolt.

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