Heat dissipation structure for reducing surface temperature of annular transformer and uninterruptible power supply
By installing an insulated windshield member on the side wall of the toroidal transformer to limit the flow of air to the top and bottom air ducts, the problem of excessive temperature on the surface of the toroidal transformer is solved, efficient heat dissipation is achieved, and cost and maintenance costs are reduced.
Patent Information
- Application Number
- CN202323648411.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2033-12-29
AI Technical Summary
Toroidal transformers in UPS have excessive surface temperature due to excessive temperature rise, which may cause harm to the human body. The prior art increases the number of fans or speeds to cool down will increase costs.
A heat dissipation structure is designed to limit air flow to the top and bottom air ducts by setting an insulated windshield between the side wall of the toroidal transformer and the housing, thereby increasing the wind pressure and wind speed and concentrating the heat dissipation effect.
Without increasing the number of fans or speed, the surface temperature of the toroidal transformer is significantly reduced, cost is reduced, and heat dissipation performance is improved, avoiding maintenance costs.
Smart Images
Figure CN222233413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat dissipation, in particular to a heat dissipation structure for reducing the surface temperature of a toroidal transformer and an uninterruptible power supply. Background Art
[0002] Ring-shaped industrial frequency transformers are used in UPS to achieve the function of multiple 120V output. However, during the operation of UPS, the temperature rise of the ring-shaped transformer is too high, causing the surface temperature of the shell to be too high, and the surface temperature of the shell will exceed 45°C. Since the transformer must meet relevant standards when used with UPS, the surface temperature of the internal transformer must be strictly controlled within 110°C, and the external shell temperature must be kept at around 45°C. Therefore, if you are not careful, it will cause harm to the human body. The main source of air volume is the cooling fan, but increasing the number of fans or using high-speed fans will increase the cost of the product. Utility Model Content
[0003] In view of the above technical problems, the utility model discloses a heat dissipation structure and an uninterruptible power supply for reducing the surface temperature of a toroidal transformer. The problem of excessive temperature rise on the transformer surface is solved by using only one fan for exhaust, and the cost is low.
[0004] To this end, the technical solution of the utility model is:
[0005] A heat dissipation structure for reducing the surface temperature of a toroidal transformer, wherein the toroidal transformer is located in a shell, the shell comprising a bottom plate, a top plate, a front side plate, a rear side plate, a left side plate and a right side plate, the front side plate being provided with an air inlet, the rear side plate being provided with a fan, the heat dissipation structure comprising a top air duct formed between the toroidal transformer and the top plate, and a bottom air duct formed between the toroidal transformer and the bottom plate; insulating wind shielding components are provided between the side walls of the toroidal transformer and the left side plate and the right side plate, and the wind coming in from the air inlet bypasses the insulating wind shielding components and flows out from the top air duct and the bottom air duct.
[0006] By adopting this technical solution, driven by the fan, the air entering from the air inlet can only flow through the top and bottom of the toroidal transformer due to the blocking effect of the insulating wind shielding component, and flow out from the top air duct and the bottom air duct. Moreover, because the air does not flow from the side, the wind pressure and wind speed passing through the top air duct and the bottom air duct are greatly improved, the wind pressure is more concentrated, and the surface heat dissipation effect of the toroidal transformer is better.
[0007] As a further improvement of the present invention, the top and bottom of the toroidal transformer are respectively connected to the top plate and the bottom plate through supporting members.
[0008] As a further improvement of the utility model, a fixing plate for reinforcing the toroidal transformer is provided in the middle of the top plate, and the top of the toroidal transformer is connected to the fixing plate via a support member.
[0009] As a further improvement of the utility model, the insulating windshield member is fixed by adhesive. Further, the adhesive is a pressure-sensitive adhesive with a temperature resistance higher than 110°C; further preferably, the insulation grade of the adhesive is Class F155°C.
[0010] As a further improvement of the present invention, the bottom of the toroidal transformer is provided with bottom insulating paper, and the insulating wind shielding component is integrally formed with the bottom insulating paper.
[0011] As a further improvement of the utility model, the insulating windshield component includes a windshield surface facing the air inlet and a side fixing surface, the windshield surface, the side fixing surface and the bottom insulating paper are integrally formed, the side fixing plate surface is provided with a bending portion, the bending portion is provided with a backing adhesive, and the bending portion is adhered to the fixing plate. With this technical solution, the side fixing surface is provided with a backing adhesive, and the angle of the insulating windshield component can be adjusted by adjusting the bonding position.
[0012] As a further improvement of the utility model, the insulating wind shielding component is arranged on the side close to the air inlet.
[0013] As a further improvement of the present invention, the support member is a bearing.
[0014] As a further improvement of the present invention, the insulating windshield component is made of insulating paper.
[0015] The utility model also discloses an uninterruptible power supply, which comprises a shell, wherein a toroidal transformer is arranged inside the shell, and the uninterruptible power supply is provided with a heat dissipation structure for reducing the surface temperature of the toroidal transformer as described in any one of the above items.
[0016] Compared with the prior art, the beneficial effects of the utility model are:
[0017] By adopting the technical solution of the utility model, an insulating windshield component is set between the side wall and the left and right plates of the toroidal transformer. The air entering from the air inlet can only flow through the top and bottom of the toroidal transformer under the blocking effect of the insulating windshield component, and flow out from the top and bottom air ducts. The air duct design is more reasonable, and the surface temperature of the transformer and the chassis is reduced to a greater extent. Secondly, it is easy to install. By placing insulating windshield components on both sides of the toroidal transformer, the overall appearance is beautiful, not easy to loosen, the overall cost is lower, the heat dissipation performance is strong, and the later maintenance costs are also saved to a large extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a top view of the toroidal transformer located in the shell of Example 1 of the utility model.
[0019] Figure 2 yes Figure 1 main view.
[0020] Figure 3 It is a cross-sectional view of the air duct of Example 1 of the utility model.
[0021] Figure 4 It is a schematic structural diagram of the insulating wind shielding component of Example 1 of the utility model.
[0022] Figure 5 This is the temperature curve of the toroidal transformer without insulating wind shielding components before the improvement of the utility model.
[0023] Figure 6 This is the temperature curve of the toroidal transformer with an insulating wind shielding component added after improvement in Example 1 of the utility model.
[0024] Reference numerals include:
[0025] 1- toroidal transformer, 2- housing, 3- insulating wind shielding member, 4- top air duct, 5- bottom air duct, 6- bottom insulating paper;
[0026] 21-bottom plate, 22-top plate, 23-front side plate, 24-rear side plate, 25-left side plate, 26-right side plate; 27-air inlet, 28-fan; 29-fixing plate;
[0027] 31- windshield surface, 32- side fixing surface, 33- bending part, 34- adhesive backing. DETAILED DESCRIPTION
[0028] The preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0029] Example 1
[0030] like Figure 1 to Figure 4 As shown, a heat dissipation structure for reducing the surface temperature of a toroidal transformer, the toroidal transformer 1 is located in a shell 2, the shell 2 includes a bottom plate 21, a top plate 22, a front side plate 23, a rear side plate 24, a left side plate 25 and a right side plate 26, the front side plate 23 is provided with an air inlet 27, the rear side plate 24 is provided with a fan 28, the heat dissipation structure includes a top air duct 4 formed between the toroidal transformer 1 and the top plate 22 and a bottom air duct 5 formed between the toroidal transformer 1 and the bottom plate 21; insulating wind shielding components 3 are provided between the side walls of the toroidal transformer 1 and the left side plate 25 and the right side plate 26, and the wind coming in from the air inlet 27 bypasses the insulating wind shielding components 3 and flows out from the top air duct 4 and the bottom air duct 5.
[0031] The top and bottom of the toroidal transformer 1 are respectively connected to the top plate 22 and the bottom plate 21 through support bearings. Furthermore, a fixing plate 29 for reinforcing the toroidal transformer 1 is provided in the middle of the top plate 22, and the top of the toroidal transformer 1 is connected to the fixing plate 29 through a support member.
[0032] like Figure 4 As shown, the bottom of the toroidal transformer 1 is provided with a bottom insulating paper 6, and the insulating windshield member 3 is integrally formed with the bottom insulating paper 6. The insulating windshield member 3 includes a windshield surface 31 facing the air inlet 27 and a side fixing surface 32, the side fixing surface 32 is provided with a bending portion 33, the windshield surface 31, the side fixing surface 32 and the bottom insulating paper 6 are integrally formed, the bending portion 33 is provided with a backing adhesive 34, and the bending portion 33 is adhered to the fixing plate 29, so that the insulating windshield member 3 can be conveniently fixed, and the angle of the insulating windshield member 3 can be adjusted by adjusting the bonding position.
[0033] Furthermore, the insulating wind shielding component 3 is arranged on a side close to the air inlet 27 .
[0034] Furthermore, the support member is a bearing.
[0035] Furthermore, the insulating windshield component 3 is made of insulating paper.
[0036] With this technical solution, the bottom of the toroidal transformer 1 is supported by the bottom plate 21, and the top is reinforced by being fixedly connected to the fixing plate 29. The middle of the toroidal transformer 1 is connected to the bottom plate 21 and the fixing plate 29 through a support bearing, forming a top air duct 4 and a bottom air duct 5. The wind direction is as follows: Figure 1 As shown by the arrow in the middle. There is an insulating windshield member 3 on each side of the toroidal transformer 1 as air duct paper, which can be fixed at a certain angle by using adhesive 34. While installation is more convenient, the angle of the air duct paper can be adjusted more flexibly according to actual conditions. Specifically, the adhesive is a pressure-sensitive adhesive with a temperature resistance higher than 110°C; the insulation grade of the adhesive is Class F 155°C, and other adhesives that meet the insulation grade are also acceptable.
[0037] When it comes to specific products, the toroidal transformer product before the improvement had a rack-type appearance. The toroidal transformer was placed flat in the center of the 2U high chassis, and there was a 5cm gap between the toroidal transformer and both sides of the chassis. This resulted in most of the air flowing through the left and right sides of the toroidal transformer, the wind pressure was not concentrated, and the surface temperature of the toroidal transformer rose sharply.
[0038] The solution of this embodiment is used for improvement. An insulating windshield member is placed on both sides of the toroidal transformer as a duct paper, so that all air volume can only flow through the top duct and the bottom duct of the toroidal transformer. The maximum distance between the top and bottom of the toroidal transformer and the casing is about 2 cm. Compared with the case where no insulating windshield members are added on both sides, the wind pressure and wind speed are greatly improved after the insulating windshield members are added. The main basis is as follows:
[0039] The following are the relevant formulas for wind volume, wind pressure, and wind speed:
[0040] ①Wp=0.5*Ro*V2
[0041] ②V=Q / S / 3600
[0042] Where Wp is wind pressure, Ro is air density, V is wind speed, S is duct cross-sectional area, and Q is total air volume per unit time. From formula ②, we can see that when the air volume Q is the same per unit time, the smaller the duct cross-sectional area S, the greater the wind speed V; from formula ①, we can see that when the wind speed W increases, the wind pressure Wp will increase exponentially; when the wind pressure increases, the surface temperature rise of the transformer will inevitably drop significantly.
[0043] Table 1 Temperature rise data before improvement
[0044] aisle Test Points Temperature(℃) 40℃ working condition 103(C) Coil outer surface 1 105.123 118.433 104(C) Coil outer surface 2 106.0735 119.3835 105(C) Coil outer surface 3 104.4619 117.7719 107(C) Coil outer surface 4 106.9476 120.2576 109(C) Chassis shell temperature 45.44801 62.99801 111(C) External Ring Temperature 26.69947 40.00947
[0045] The actual test temperature rise data before and after the improvement is as follows Figure 5 and Figure 6 As shown, Table 1 and Table 2 are the temperature rise comparison data of the two. It can be seen from the data that by adopting the improved solution of this embodiment 1, the temperature rise of the surface of the toroidal transformer is significantly reduced by about 10°C.
[0046] Table 2 Temperature rise data of this embodiment after improvement
[0047] aisle Test Points Temperature(℃) 40℃ working condition 106(C) Coil outer surface 1 94.52595 110.4599 107(C) Coil outer surface 2 94.86181 110.7958 108(C) Coil outer surface 3 92.0609 107.9949 109(C) Coil outer surface 4 93.4219 109.3559 112(C) Shell temperature 36.9133 52.8473 113(C) External Ring Temperature 24.06687 40.00087
[0048] Example 2
[0049] An uninterruptible power supply comprises a shell, a toroidal transformer is arranged in the shell, and the uninterruptible power supply is provided with a heat dissipation structure for reducing the surface temperature of the toroidal transformer as described in Example 1.
[0050] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0051] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0052] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the shape and structure of the present utility model are within the protection scope of the present utility model.
Claims
1. A heat dissipation structure for reducing the surface temperature of a toroidal transformer, wherein the toroidal transformer is located in a housing, wherein the housing comprises a bottom plate, a top plate, a front side plate, a rear side plate, a left side plate and a right side plate, wherein the front side plate is provided with an air inlet, and the rear side plate is provided with a fan, wherein: The heat dissipation structure includes a top air duct formed between the toroidal transformer and the top plate, and a bottom air duct formed between the toroidal transformer and the bottom plate; insulating wind shielding components are provided between the side walls of the toroidal transformer and the left and right plates, and the wind entering from the air inlet bypasses the insulating wind shielding components and flows out from the top and bottom air ducts.
2. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 1, characterized in that: The top and bottom of the toroidal transformer are connected to the top plate and the bottom plate respectively through supporting members.
3. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 2 is characterized in that: A fixing plate for reinforcing the toroidal transformer is provided in the middle of the top plate, and the top of the toroidal transformer is connected to the fixing plate via a support member.
4. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 3 is characterized in that: The insulating wind shielding component is fixed by adhesive.
5. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 4 is characterized in that: The bottom of the toroidal transformer is provided with bottom insulating paper, and the insulating wind shielding component is integrally formed with the bottom insulating paper.
6. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 5, characterized in that: The insulating windshield component includes a windshield surface facing the air inlet and a side fixing surface, the windshield surface, the side fixing surface and the bottom insulating paper are integrally formed, the side fixing surface is provided with a bending portion, the bending portion is provided with a backing adhesive, and the bending portion is adhered to the fixing plate.
7. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 6, characterized in that: The insulating wind shielding component is arranged on a side close to the air inlet.
8. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to claim 2, characterized in that: The supporting member is a bearing.
9. The heat dissipation structure for reducing the surface temperature of a toroidal transformer according to any one of claims 1 to 8, characterized in that: The insulating windshield component is made of insulating paper.
10. An uninterruptible power supply, characterized in that: It comprises a shell, in which a toroidal transformer is arranged, and the uninterruptible power supply is provided with a heat dissipation structure for reducing the surface temperature of the toroidal transformer as claimed in any one of claims 1 to 9.