Anti-pressure-loss resistor unit

Abstract

The utility model relates to the technical field of resistors, in particular to an anti-pressure-loss resistor unit which comprises a cooling water pipe and a plurality of resistor modules arranged around the cooling water pipe, each resistor module comprises a long-strip-shaped resistor support, a containing groove is formed in the top of each resistor support, and a resistor assembly is arranged in each containing groove. The resistor assembly comprises a plurality of resistor discs which are arranged at intervals along the length direction of the accommodating groove and a conductive strip which is used for connecting the plurality of resistor discs in a conductive manner; the resistor assembly is provided with a leading-out terminal which extends out of the accommodating groove; a limiting part which elastically presses the resistor assembly is also arranged in the accommodating groove, so that the resistor disc can overcome the elastic force of the limiting part to deform after being heated and expanded, and a deformation gap is reserved between the resistor assembly and the groove wall of the accommodating groove. The resistor adopts water cooling, is high in power and stable in performance, improves stable use by changing the fixing form of the resistor disc, solves the common problem of local cracking of the resistor disc caused by heating of the resistor disc, and improves the use stability of the resistor.

Description

Technical Field

[0001] The utility model relates to the technical field of resistors, in particular to a pressure loss-proof resistor unit. Background Art

[0002] With the development of data centers, there are more and more liquid-cooled servers, so water-cooled loads are used more and more. Constant-power water-cooled loads can keep the power constant when the voltage fluctuates. Therefore, they are used more and more in data centers. The most important component in constant-power water-cooled loads is the constant-power resistor. The performance of the constant-power resistor directly affects the test performance of the constant-power load. Since the traditional constant-power resistor relies on the close fit between the resistor sheet and the outer wall to achieve the cooling effect, during the use of the constant-power resistor, due to the heating of the resistor sheet, thermal expansion and contraction, but because the outer shell is in contact with water, the temperature is not high, and the outer shell is not deformed much, resulting in the resistor sheet having no expansion space and being squeezed and ruptured, affecting the use of the resistor. Summary of the invention

[0003] In view of the above technical problems in the prior art, the utility model provides an anti-pressure loss resistor unit.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] Provided is a pressure loss prevention resistor unit, comprising a cooling water pipe and a plurality of resistor modules arranged around the cooling water pipe, each resistor module comprising a long strip resistor support, a storage groove being provided on the top of the resistor support along its length direction, a resistor assembly being provided in the storage groove, the resistor assembly comprising a plurality of resistor sheets arranged at intervals along the length direction of the storage groove and a conductive strip for conductively connecting the plurality of resistor sheets to each other, the resistor assembly being provided with a lead terminal extending out of the storage groove; a limiting member for elastically pressing the resistor assembly is also provided in the storage groove, so that the resistor sheet can be deformed by overcoming the elastic force of the limiting member when it is thermally expanded, and a deformation gap is left between the resistor assembly and the groove wall of the storage groove.

[0006] Specifically, a lower insulating layer is laid on the bottom of the storage groove, and the conductive strip includes an upper conductive strip and a lower conductive strip, the lower conductive strip is stacked on the top of the lower insulating layer, a plurality of resistor sheets are placed on the lower conductive strip, and the upper conductive strip is pressed on the top of the plurality of resistor sheets. An upper insulating layer is also provided on the top of the upper conductive strip, and a pressure strip is provided on the top of the upper insulating layer, and a limit piece elastically presses the pressure strip.

[0007] Specifically, the limiting member includes a limiting plate and a spring, the notch of the receiving slot is provided with a tapered closing portion, the limiting plate can be floatingly embedded in the closing portion, one end of the spring abuts against the pressure strip, and the other end of the spring abuts against the limiting plate.

[0008] Specifically, there are multiple groups of limiting members, the limiting plates of each group of limiting members correspond to multiple springs, and the multiple groups of limiting members are arranged at intervals along the length direction of the pressure strip.

[0009] Specifically, the resistor unit further includes a heat-insulating layer and an outer cylinder. The cylindrical heat-insulating layer is sleeved on the outside of the plurality of resistor modules, and the outer cylinder is sleeved outside the heat-insulating layer.

[0010] Specifically, the outer side of the closing portion is arc-shaped, and the arc fits with the inner wall of the thermal insulation layer.

[0011] Specifically, a connecting portion is further provided on the outer side of the resistor support, and different resistor units are arranged in contact with each other via the connecting portion.

[0012] Specifically, the upper insulating layer and the lower insulating layer are mica layers.

[0013] Specifically, the resistor is PTC ceramic.

[0014] Specifically, a dovetail groove is arranged on the outer side of the cooling water pipe, a dovetail tenon embedded in the dovetail groove is arranged on the side of the resistor support, and an inner concave arc surface fitting with the outer wall of the cooling water pipe is arranged on the outer side of the dovetail tenon.

[0015] Beneficial effects of the utility model:

[0016] The utility model discloses a pressure loss-proof resistor unit, which adopts water cooling, has high power and stable performance, and improves the stable use of the resistor by changing the fixing form of the resistor sheet. It solves the common problem of partial cracking of the resistor sheet caused by heating of the resistor sheet, and improves the stability of the resistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the structure of a pressure loss prevention resistor unit in an embodiment.

[0018] Figure 2 It is an exploded view of an anti-pressure loss resistor unit in an embodiment.

[0019] Figure 3 Schematic diagram of the structure of the resistor module in the embodiment.

[0020] Figure 4 is a cross-sectional view of the resistor module in the embodiment.

[0021] Figure 5 is a cross-sectional view of a resistor unit in the embodiment.

[0022] Reference numerals:

[0023] Cooling water pipe 1, dovetail groove 11;

[0024] Resistor module 2, resistor support 21, storage groove 211, closing portion 212, connecting portion 213, dovetail tenon 214, inner concave arc surface 215;

[0025] Resistor assembly 3, resistor sheet 31, conductive strip 32, upper conductive strip 33, lower conductive strip 34, lead terminal 35, lower insulating layer 36, upper insulating layer 37, pressure strip 38;

[0026] Limiting member 4, limiting plate 41, spring 42;

[0027] Insulation layer 5 and outer cylinder 6. DETAILED DESCRIPTION

[0028] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0029] A pressure loss prevention resistor unit of this embodiment, such as Figures 1 to 5 As shown, it includes a cooling water pipe 1 and a plurality of resistor modules 2 arranged around the cooling water pipe 1. Six are shown in this example. Each resistor module 2 includes a long strip resistor support 21. The top of the resistor support 21 is provided with a receiving groove 211 along its length direction, and its groove is facing upward. A resistor assembly 3 is provided in the receiving groove 211. The resistor assembly 3 includes a plurality of resistor sheets 31 arranged at intervals along the length direction of the receiving groove 211 and a conductive strip 32 that connects the plurality of resistor sheets 31 to each other. The resistor sheets 31 are PTC ceramics. The resistor sheet 31 at the end of the resistor assembly 3 is connected to a lead-out terminal 35 extending out of the receiving groove 211. The receiving groove 211 is also provided with a limiter 4 that elastically presses the resistor assembly 3, so that the resistor sheet 31 can be deformed by overcoming the elastic force of the limiter 4 when it is heated and expanded. A deformation gap is left between the resistor assembly 3 and the groove wall of the receiving groove 211, that is, it can be deformed in the thickness direction and the width direction.

[0030] Specifically, the bottom of the storage groove 211 is paved with a lower insulating layer 36, and the conductive strip 32 includes an upper conductive strip 33 and a lower conductive strip 34. The lower conductive strip 32 is stacked on the top of the lower insulating layer 36, and multiple resistors 31 are placed on the lower conductive strip 32. The upper conductive strip 33 is pressed on the top of the multiple resistors 31. An upper insulating layer 37 is also provided on the top of the upper conductive strip 33. A pressure strip 38 is provided on the top of the upper insulating layer 37, and the limiter 4 elastically presses the pressure strip 38. The upper and lower insulating layers 36 are provided to further improve the insulation performance. In fact, the resistor support 21 is made of insulating material, and the lack of upper and lower insulating layers 36 can also meet the basic use requirements. In order to improve heat transfer, this case uses an aluminum shell resistor support 21, and the upper and lower insulating layers 37 and 36 are insulating materials such as mica layer and gold film.

[0031] Specifically, the limiting member 4 includes a limiting plate 41 and a spring 42. The notch of the receiving groove 211 is provided with a tapered closing portion 212 in a dovetail groove shape, which is convenient for installing the limiting plate 41. The limiting plate 41 can be floatingly embedded in the closing portion 212. One end of the spring 42 abuts against the pressure strip 38, and the other end of the spring 42 abuts against the limiting plate 41. The number of limiting members 4 is multiple groups, and the limiting plates 41 of each group of limiting members 4 correspond to multiple springs 42. The multiple groups of limiting members 4 are arranged at intervals along the length direction of the pressure strip 38.

[0032] In this embodiment, the resistor unit further includes a cylindrical insulation layer 5 and an outer cylinder 6, wherein the insulation layer 5 is sleeved on the outside of the plurality of resistor modules 2, and the outer cylinder 6 is sleeved outside the insulation layer 5. The outer side of the closing portion 212 is arc-shaped, and the arc fits with the inner wall of the insulation layer 5, which can fully insulate and prevent excessive heat accumulation.

[0033] Specifically, a connecting portion 213 is further provided on the outer side of the resistor support 21 , and different resistor units are arranged in close contact with each other through the connecting portion 213 , thereby improving the overall compactness.

[0034] In this embodiment, a dovetail groove 11 is provided on the outer side of the cooling water pipe 1, and a dovetail tenon 214 embedded in the dovetail groove 11 is provided on the side of the resistor support 21. The outer side of the dovetail tenon 214 is provided with an inner concave arc surface 215 that fits with the outer wall of the cooling water pipe 1, so that the heat of the resistor support 21 can be more fully transferred to the cold water pipe for removal.

[0035] The manufacturing method of the resistor unit comprises the following steps:

[0036] 1. First, make a resistor support 21 in the form of a dovetail groove, install a lower insulating layer 36 (mica, gold film, etc.) in the dovetail groove, then install a copper sheet as a lower conductive strip 32 on the lower insulating layer 36, and install a PTC ceramic resistor 31 on the copper sheet. According to the requirements of the resistance value, adjust the number of resistors 31. If one resistor support 21 is not full of ceramic resistors 31, an insulating ceramic sheet of the same size as the ceramic resistor 31 can be used to replace the ceramic resistor 31. Install an upper conductive strip 33 on the resistor 31, and then install an upper insulating layer 37, and then install a pressure strip 38 on the upper insulating layer 37. Finally, install a limiter 4 on the pressure strip 38 and fix it with the closing portion 212 of the storage groove 211. The number of limiters 4 can be adjusted according to the length of the resistor to press the resistor 31. When the resistor 31 is heated and expanded, the pressure strip 38 can move up and down through the spring 42 without causing the resistor 31 to be squeezed and damaged.

[0037] 2. Install the assembled resistor module 2 on the cooling water pipe 1. The fixing form is still fixed in the form of a dovetail groove 11. According to the power of the resistor, the number of resistor supports 21 can also be adjusted, and it is very convenient to adjust.

[0038] 3. Install a thermal insulation layer 5 on the outer ring of the resistor module 2, so that the heat generated by the resistor can be better taken away by water, and the cooling effect of the cooling system can be better tested. Finally, the resistor is packaged with an outer cylinder 6 to complete the production.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection 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.

[0040] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt the conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A pressure loss prevention resistor unit, characterized in that: It includes a cooling water pipe and multiple resistor modules arranged around the cooling water pipe, each resistor module includes a long strip resistor support, the top of the resistor support is provided with a storage groove along its own length direction, a resistor assembly is arranged in the storage groove, the resistor assembly includes a plurality of resistor sheets arranged at intervals along the length direction of the storage groove and a conductive strip that connects the plurality of resistor sheets to each other conductively, and the resistor assembly is provided with a lead terminal extending out of the storage groove; a limiting member that elastically presses the resistor assembly is also provided in the storage groove, so that the resistor sheet can be deformed by overcoming the elastic force of the limiting member when it expands due to heat, and a deformation gap is left between the resistor assembly and the groove wall of the storage groove.

2. The anti-pressure loss resistor unit according to claim 1, characterized in that: A lower insulating layer is laid at the bottom of the storage groove, and the conductive strip includes an upper conductive strip and a lower conductive strip, the lower conductive strip is stacked on the top of the lower insulating layer, a plurality of resistor sheets are placed on the lower conductive strip, the upper conductive strip is pressed on the top of the plurality of resistor sheets, an upper insulating layer is also provided on the top of the upper conductive strip, a pressure strip is provided on the top of the upper insulating layer, and a limit piece elastically presses the pressure strip.

3. The anti-pressure loss resistor unit according to claim 2, characterized in that: the limiter It comprises a limit plate and a spring, the notch of the receiving groove is provided with a tapered closing portion, the limit plate can be floatably embedded in the closing portion, one end of the spring abuts against the pressure strip, and the other end of the spring abuts against the limit plate.

4. The anti-pressure loss resistor unit according to claim 3 is characterized in that: There are multiple groups of limiting members, and the limiting plates of each group of limiting members correspond to multiple springs. The multiple groups of limiting members are arranged at intervals along the length direction of the pressure strip.

5. The anti-pressure loss resistor unit according to claim 3, characterized in that: The resistance unit also includes a heat-insulating layer and an outer cylinder. The cylindrical heat-insulating layer is sleeved on the outer sides of the plurality of resistance modules, and the outer cylinder is sleeved on the outside of the heat-insulating layer.

6. The anti-pressure loss resistor unit according to claim 5, characterized in that: The outer side of the closing portion is arc-shaped, and the arc is in contact with the inner wall of the thermal insulation layer.

7. The anti-pressure loss resistor unit according to claim 5, characterized in that: A connecting portion is also provided on the outer side of the resistor support, and different resistor units are arranged in contact with each other through the connecting portion.

8. The anti-pressure loss resistor unit according to claim 2, characterized in that: The upper insulating layer and the lower insulating layer are mica layers.

9. The anti-pressure loss resistor unit according to claim 1, characterized in that: The resistor is PTC ceramic.

10. The pressure loss prevention resistor unit according to claim 1, characterized in that: A dovetail groove is arranged on the outer side of the cooling water pipe, a dovetail tenon embedded in the dovetail groove is arranged on the side of the resistor support, and an inner concave arc surface fitting with the outer wall of the cooling water pipe is arranged on the outer side of the dovetail tenon.

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