Ventilation and heat dissipation structure of low-voltage cabinet

Abstract

The utility model relates to a ventilation and heat dissipation structure of a low-voltage cabinet, and belongs to the technical field of power distribution equipment. The low-voltage cabinet structurally comprises a low-voltage cabinet body, a large-current frame circuit breaker is fixed in the low-voltage cabinet body, a cross-flow fan is fixed at the position, lower than the large-current frame circuit breaker, of a middle-rear area in the cabinet body, and an air duct baffle is fixed below the large-current frame circuit breaker in a middle-front area in the cabinet body. Air outlets are formed in the front and rear ends of the upper part of the cabinet body; and the air inlet, the air duct baffle and the air outlets form an air duct. According to the utility model, the conception is ingenious, and the air duct structure design is optimized, so that the air is effectively prevented from forming a turbulent flow phenomenon in the cabinet, and the heat dissipation efficiency is improved; due to the internal installation mode of the fan, the situation that the protection level is reduced due to hole opening of a traditional rear door fan is eliminated, and then potential safety hazards are eliminated; maintenance personnel can conveniently and quickly adjust the angle of the fan according to the infrared temperature measurement result in the low-voltage cabinet so as to quickly cool the high temperature rise point.

Description

TECHNICAL FIELD

[0001] The utility model relates to a low -voltage cabinet ventilation heat dissipation structure belongs to power distribution equipment technical field. BACKGROUND

[0002] Low -voltage switch cabinet is widely used integrated electrical equipment in the field of electric energy control and distribution, and its development has experienced more than half a century, from the initial performance of lower, single function, larger equipment introduced from abroad, gradually evolved into the current high -performance, intelligent, miniaturization and multifunctional product.In the operation process, due to the increase of bus current density leads to the heat rise, and the heat dissipation space is relatively reduced, so that the temperature rise of the cabinet components, connectors, insulating parts intensifies.If the temperature of the switch cabinet continues to exceed the standard in operation, it will cause the vicious cycle of resistance increase and temperature rise, and even may cause the serious consequences of insulation damage and equipment fire.Therefore, in the development and design of low -voltage switch cabinet, controlling temperature rise becomes a key factor.At present, the common heat dissipation measures include installing the air -intaking axial flow fan on the back door of low -voltage cabinet and adding the air -outlet hole on the top of the cabinet body to realize air convection and promote hot air discharge.However, due to the limited power of axial flow fan, simply increasing the number of fan to improve the air intake often leads to turbulence phenomenon, thereby reducing the heat dissipation efficiency.In addition, a large number of actual temperature measurement data show that the area with higher temperature rise is mainly concentrated in the connection between the circuit breaker and the copper bar, and the cabinet rear fan is far away from these areas, which cannot effectively play the role of heat dissipation. SUMMARY

[0003] The utility model aims at: in view of the heat dissipation of prior art, propose a kind of low -voltage cabinet ventilation heat dissipation structure, by reasonable layout internal space and optimization heat dissipation air duct design, significantly improve the heat dissipation efficiency.In addition, the structure can adjust fan angle according to switch model and infrared thermal imaging data, ensure that the area with higher temperature rise is fully ventilated and cooled.

[0004] In order to achieve the above purpose, a kind of low -voltage cabinet ventilation heat dissipation structure of the utility model, including low -voltage cabinet, fixed large -current frame circuit breaker in the low -voltage cabinet, fixed transverse flow fan in the middle rear area of cabinet, below the large -current frame circuit breaker, fixed air duct baffle in the middle front area of cabinet, below the large -current frame circuit breaker, the lower rear of the cabinet body of low -voltage cabinet is equipped with air inlet, and the front and rear ends of the upper part of cabinet body are equipped with air outlet, and the air inlet, air duct baffle and air outlet form air duct.

[0005] Further, the rear of the large -current frame circuit breaker is fixedly connected with copper bar;The air inlet is equipped with air inlet grille, and the air outlet is equipped with air outlet grille.

[0006] The two sides of the transverse flow fan are equipped with fan adjusting plate.

[0007] The upper and lower parts of the fan adjusting plate are provided with adjusting plate fixing holes, the front surface is provided with a mounting plate fixing hole and adjusting fixing holes arranged in an array with the mounting plate fixing hole as the center.

[0008] The bottom of the cross-flow fan is provided with a fan mounting plate.

[0009] The two sides of the fan mounting plate are provided with mounting plate mounting holes, and the front surface is provided with fan mounting holes.

[0010] The mounting plate mounting holes are matched with the mounting plate fixing holes and the adjusting fixing holes.

[0011] The upper and lower ends of the fan mounting plate are outwardly folded to form two folded edges to form double folded edges.

[0012] The air duct baffle is a flat plate structure.

[0013] The utility model discloses the clever thought is ingenious, through optimizing air duct structure design, its beneficial effect is: effectively avoid the turbulent flow phenomenon that air forms in the cabinet, thereby promote the heat dissipation efficiency, the inside installation mode of fan eliminates the protection level reduction caused by the traditional rear door fan opening, and further eliminates potential safety hazard, the adjustability of cross-flow fan angle makes it can adapt to the structure requirement of most low-voltage cabinet, and the infrared temperature measurement result in the low-voltage cabinet is convenient for the maintenance personnel to adjust the fan angle to realize the quick cooling of temperature rise high point. BRIEF DESCRIPTION OF DRAWINGS

[0014] The utility model will be further described below in combination with the drawings.

[0015] Figure 1 It is the three-dimensional structure schematic diagram of one embodiment of the utility model.

[0016] Figure 2 It is the air duct schematic diagram of Figure 1 .

[0017] Figure 3 It is the installation position schematic diagram of the high current frame circuit breaker and connecting copper bar in Figure 1 .

[0018] Figure 4 It is the front structure schematic diagram of Figure 3 .

[0019] Figure 5 It is the rear structure schematic diagram of Figure 3 .

[0020] Figure 6 It is the structure schematic diagram of the fan adjusting plate in Figure 1 .

[0021] Figure 7 It is the structure schematic diagram of the fan adjusting plate in Figure 1Structure diagram of a stroke machine mounting plate.

[0022] Figure 8 For Figure 7 side view. DETAILED DESCRIPTION

[0023] Example One

[0024] The structure of this embodiment is shown in Figures 1-8 A low-voltage cabinet ventilation and heat dissipation structure includes a low-voltage cabinet 1, a high-current frame circuit breaker is fixed in the low-voltage cabinet, a cross-flow fan 4 is fixed in the middle rear area of the cabinet below the high-current frame circuit breaker, a wind tunnel baffle is fixed in the middle front area of the cabinet below the high-current frame circuit breaker, an air inlet is arranged at the lower rear of the cabinet body, air outlets are arranged at the front and rear ends of the upper part of the cabinet body, and the air inlet, the wind tunnel baffle 6 and the air outlets form a wind tunnel. The two sides of the cross-flow fan 4 are provided with fan adjusting plates. The bottom of the cross-flow fan 4 is provided with a fan mounting plate 5. The direction of the wind tunnel is indicated by arrows in Figure 2 .

[0025] The structures of the components are as follows:

[0026] The low-voltage cabinet 1 is a low-voltage complete equipment, and a high-current frame circuit breaker 1-1 is arranged in the low-voltage cabinet 1. The high-current frame circuit breaker 1-1 is a conventional model sold on the market. A connecting copper bar 1-2 is arranged at the rear of the frame circuit breaker 1-1 as an electric energy transmission carrier, which is a main heating component in the low-voltage cabinet 1. A front air outlet grille 1-3 is arranged at the front upper part of the low-voltage cabinet 1 for air outlet at the front upper part. A rear air outlet grille 1-4 is arranged at the rear upper part of the low-voltage cabinet 1 for air outlet at the rear upper part. An air inlet grille 1-5 is arranged at the rear lower part of the low-voltage cabinet 1 for air inlet at the rear lower part.

[0027] The fan left adjusting plate 2 is made of metal material and is bent. The fan left adjusting plate 2 is provided with adjusting plate fixing holes 2-1 at the upper and lower parts, which are used for fixing the fan left adjusting plate 2 at the rear lower part of the low-voltage cabinet 1. The fan left adjusting plate 2 is provided with mounting plate fixing holes 2-2 at the front, which are used for fixing the fan mounting plate 5. The fan left adjusting plate 2 is provided with adjusting fixing holes 2-3 at the front, which are arranged in an array with the mounting plate fixing holes 2-2 as the center, are used for fixing the fan mounting plate 5, and can adjust the installation angle of the fan mounting plate 5 according to the actual situation, so as to adjust the air outlet direction of the cross-flow fan 4. The fan adjusting plates are symmetrically arranged left and right, and have the same structure. The structure of the fan right adjusting plate is omitted here.

[0028] The cross-flow fan 4 is a conventional model sold on the market and is provided with an air inlet and an air outlet.

[0029] The fan mounting plate 5 is made of bent metal material. It has mounting holes 5-1 on the left and right sides, which are respectively matched with the mounting holes 2-2 and the adjustment fixing holes 2-3 in the fan adjusting plates 2 and 3 to fix the fan mounting plate 5 and adjust its angle. The front side has a fan mounting hole 5-2 for mounting and fixing the crossflow fan 4. The top and bottom have double folded edges 5-3 to strengthen the fan mounting plate 5 and reduce resonance and noise when the fan is running.

[0030] The air duct baffle 6 is made of metal stamping and has a flat structure. It is installed in the lower part of the circuit breaker 1-1 in the inner frame of the low voltage cabinet 1, which separates the front and rear of the low voltage cabinet 1. This can prevent air from forming turbulence in the front compartment and improve heat dissipation efficiency.

[0031] In addition to the embodiments described above, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. A low-voltage cabinet ventilation and heat dissipation structure, comprising a low-voltage cabinet, wherein a high-current frame circuit breaker is fixed in the low-voltage cabinet, characterized in that: The low-voltage cabinet is characterized in that: a cross-flow fan is fixed in the middle rear area of the cabinet below the high-current frame circuit breaker, both sides of the cross-flow fan are provided with fan adjusting plates; a wind channel baffle is fixed below the high-current frame circuit breaker in the middle front area of the cabinet; an air inlet is arranged at the lower rear part of the cabinet body of the low-voltage cabinet; air outlets are arranged at the front and rear ends of the upper part of the cabinet body; the air inlet, the wind channel baffle and the air outlets form a wind channel.

2. The low-voltage cabinet ventilation and heat dissipation structure according to claim 1, characterized in that: The rear part of the high-current frame circuit breaker is fixedly connected with a copper bar; the air inlet is provided with an air inlet grille, and the air outlet is provided with an air outlet grille.

3. The low-voltage cabinet ventilation structure of claim 1, wherein: The upper and lower parts of the fan adjusting plate are provided with adjusting plate fixing holes, the front part is provided with a mounting plate fixing hole and adjusting fixing holes which are arranged in an array with the mounting plate fixing hole as the center.

4. The low-voltage cabinet ventilation structure of claim 1, wherein: The bottom part of the cross-flow fan is provided with a fan mounting plate.

5. The low-voltage cabinet ventilation structure of claim 4, wherein: The two sides of the fan mounting plate are provided with mounting plate mounting holes, and the front part is provided with fan mounting holes.

6. The low-voltage cabinet ventilation and heat dissipation structure according to claim 5, characterized in that: The mounting plate mounting holes are matched with the mounting plate fixing holes and the adjusting fixing holes.

7. The low-voltage cabinet ventilation and heat dissipation structure according to claim 4, characterized in that: The upper and lower ends of the fan mounting plate are outwardly folded to form two folded edges to form double folded edges.

8. The low-voltage cabinet ventilation structure of claim 1, wherein: The wind channel baffle is a flat plate structure.

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