Adjustable mounting bracket for transformer fan and transformer

Abstract

The utility model discloses an adjustable mounting bracket for a transformer fan, which relates to the technical field of transformers, and aims to solve the problems that the position of the fan on a fan bracket cannot be adjusted and the fan is troublesome to disassemble and assemble in the prior art, and adopts the technical scheme that the adjustable mounting bracket comprises a guide rail, a mounting plate, an adjusting mounting component and the fan, and a sliding block is arranged in a sliding cavity of the guide rail in a sliding manner; one end of the spring abuts against the supporting plate, the other end of the spring is fixedly connected with the sliding block, the spring presses the abutting portion of the sliding block to the abutting plate of the guide rail, and the fan is fixed through friction force between the abutting portion and the abutting plate. The mounting part of the sliding block is connected with the mounting plate and protrudes out of the abutting plate. After the mounting plate is pressed to compress the spring, the sliding block is not tightly attached to the abutting plate any more, the position of the draught fan on the transformer radiator can be adjusted according to needs, the draught fan does not need to be detached from the guide rail, the sliding block is pressed to the abutting plate by the spring after the mounting plate is loosened, the draught fan is fixed, and the position of the draught fan on the guide rail is conveniently adjusted and fixed.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field more specifically, it relates to a kind of adjustable installation support of transformer fan and transformer. BACKGROUND

[0002] Oil-immersed transformer in the operation process, current through coil can generate resistance loss, this part of loss will be converted into heat, cause transformer internal temperature to rise, therefore transformer tank uses insulating oil as cooling medium to carry out heat exchange.But sheet type radiator is commonly used heat exchange device set on the box, the fan is usually set on sheet type radiator in prior art, uses fan to strengthen the heat dissipation effect of sheet type radiator.In prior art, the support of installing fan basically adopts welding fixed type, and the position of fan and the hole position of fan support opened by bolt connection is not adjustable, after testing the heat dissipation effect of transformer, if the air cooling effect does not reach the expected temperature rise, usually due to the installation position of fan is not the hottest point position of sheet type radiator, position needs to be adjusted, fixedly installed fan cannot adjust position.Or need to disassemble fan, re-perforate in the position required to install fan to install fan, and the disassembly of fan is very inconvenient. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model provides a kind of adjustable installation support of transformer fan, can be adjusted the position of fan on guide rail, solve the technical problems that fan cannot be adjusted the position on fan support, fan disassembly is troublesome.

[0004] Another purpose of the utility model is to provide a kind of transformer using the above-mentioned adjustable installation support of transformer fan, can adjust the position of fan according to the condition of transformer, so that radiator obtains the best heat dissipation effect.

[0005] The technical purpose is achieved by the following technical scheme: a variable transformer fan adjustable mounting bracket, comprising: a guide rail, a mounting plate, an adjusting and mounting assembly and a fan, the fan is detachably connected with the mounting plate; the guide rail comprises a support plate, a first connecting plate and an abutting plate which are arranged along the vertical direction, both ends of the width direction of the support plate are respectively connected with the first connecting plates, one end of the first connecting plate away from the support plate is connected with the abutting plate, the abutting plate is arranged along the vertical direction towards the opposite first connecting plate, a sliding cavity is formed between the support plate, the first connecting plate and the abutting plate; the adjusting and mounting assembly comprises a sliding block and a spring, the sliding block is arranged in the sliding cavity along the vertical direction, one end of the spring is fixedly connected with the sliding block, and the other end of the spring is abutted with the support plate; the sliding block comprises a mounting portion and an abutting portion, the abutting portion is connected to both ends of the mounting portion, the abutting portion is abutted with the abutting plate, and the mounting portion is arranged on the end surface of the abutting plate away from the support plate, and the mounting portion is detachably connected with the mounting plate.

[0006] Optionally, the abutting plate comprises a second connecting plate and an abutting edge strip, one end of the second connecting plate is connected to one end of the first connecting plate away from the support plate, the other end of the second connecting plate is connected with the abutting edge strip, and the abutting edge strip is arranged along the vertical direction towards the support plate, and the abutting portion is provided with an abutting groove; the abutting edge strip is inserted into the abutting groove and abutted with the abutting portion.

[0007] Optionally, one end of the mounting portion towards the support plate is provided with a guide column, and the spring is sleeved on the guide column.

[0008] Optionally, a first mounting hole is formed through the mounting portion along the thickness direction of the mounting portion, and a second mounting hole is formed through the mounting plate along the thickness direction of the mounting plate; the adjusting and mounting assembly further comprises a first fastener, and the first fastener passes through the second mounting hole and the first mounting hole.

[0009] Optionally, a plurality of third mounting holes are arranged at intervals along the length direction of the support plate, and the first fastener sequentially passes through the second mounting hole, the first mounting hole and the corresponding third mounting hole.

[0010] Optionally, the mounting plate comprises a first frame strip and a second frame strip which are symmetrically arranged, the first frame strip is arranged along the vertical direction, the second frame strip is arranged along the horizontal direction, and the first frame strip and the second frame strip form a ventilation cavity; the second mounting hole is arranged on the second frame strip.

[0011] Optionally, the transformer fan adjustable mounting bracket further comprises a second fastener, the first frame strip is provided with a fourth mounting hole along the thickness direction of the first frame strip, the fan comprises an outer frame body, the outer frame body is provided with a fifth mounting hole, and the second fastener passes through the fifth mounting hole and the fourth mounting hole.

[0012] Optionally, a plurality of guide rails are arranged along the width direction of the mounting plate, and the second frame strip is provided with a plurality of second mounting holes corresponding to the guide rails along the length direction of the second frame strip.

[0013] Optionally, the transformer fan adjustable mounting bracket further comprises a connecting angle steel, the connecting angle steel is connected with the end of the supporting plate, and the connecting angle steel is used for mounting the guide rail on the transformer.

[0014] The utility model discloses still provide a kind of transformer, including the radiator and the transformer fan adjustable mounting bracket of the described, the guide rail is fixedly connected on the side of the radiator.

[0015] Compared with the prior art, the embodiment of the utility model has the following beneficial effects:

[0016] The transformer fan adjustable mounting bracket, after the compression spring is compressed by pressing the mounting plate, the sliding block is no longer tightly attached to the abutment plate, the position of the fan on the transformer radiator can be adjusted as required, without disassembling the fan from the guide rail, the sliding block is tightly pressed at the abutment plate to fix the fan after the mounting plate is loosened, the position of the fan on the guide rail is conveniently adjusted and fixed, and the problems that the position of the fan on the fan bracket cannot be adjusted and the fan is inconvenient to disassemble and assemble are solved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is structural schematic view of the transformer fan adjustable mounting bracket of an embodiment of the utility model;

[0018] Figure 2 It is top view of the transformer fan adjustable mounting bracket of an embodiment of the utility model;

[0019] Figure 3 It is Figure 2 Local enlarged view of A of the transformer fan adjustable mounting bracket of an embodiment of the utility model;

[0020] Figure 4 It is structural schematic view of the sliding block of the transformer fan adjustable mounting bracket of an embodiment of the utility model;

[0021] Figure 5 It is front view of the transformer fan adjustable mounting bracket of an embodiment of the utility model;

[0022] Figure 6The rear view of the adjustable mounting support of the transformer fan of an embodiment of the present utility model;

[0023] Figure 7 The front view of the mounting plate of the adjustable mounting support of the transformer fan of an embodiment of the present utility model;

[0024] Figure 8 The rear view of the outer frame body of the fan of the adjustable mounting support of the transformer fan of an embodiment of the present utility model;

[0025] Figure 9 The structural schematic diagram of the transformer of an embodiment of the present utility model.

[0026] Explanation of reference numerals: 1, guide rail; 101, support plate; 1011, third mounting hole; 102, first connecting plate; 103, abutting plate; 1031, second connecting plate; 1032, abutting edge strip; 104, sliding cavity; 2, mounting plate; 201, second mounting hole; 202, first frame strip; 2021, fourth mounting hole; 203, second frame strip; 204, ventilation cavity; 3, adjustable mounting assembly; 301, sliding block; 3011, mounting portion; 3012, abutting portion; 30121, abutting groove; 3013, first mounting hole; 302, spring; 303, guide column; 304, first fastener; 4, fan; 401, outer frame body; 4011, fifth mounting hole; 5, second fastener; 6, connecting angle steel; 7, radiator. DETAILED DESCRIPTION

[0027] The embodiments of the present utility model are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in the specification.

[0028] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not define the limiting conditions for the implementation of the present utility model, so they do not have technical substantive significance. Any modification of structure, change of proportional relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present utility model, should still fall within the scope covered by the technical content disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the specification are only for the convenience of clear description, and not to limit the scope of the present utility model, and the change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the scope of the present utility model. The specific structure can be described with reference to the drawings of the patent application.

[0029] To solve the above technical problems, the present utility model discloses a kind of adjustable mounting support of transformer fan, as shown in figureFigures 1 to 3 As shown, it comprises: a guide rail 1, a mounting plate 2, an adjusting and mounting assembly 3 and a fan 4, the fan 4 is detachably connected with the mounting plate 2; the guide rail 1 comprises a support plate 101, a first connecting plate 102 and an abutting plate 103, the two ends of the support plate 101 in the width direction are respectively connected with the first connecting plate 102, the end of the first connecting plate 102 away from the support plate 101 is connected with the abutting plate 103, the abutting plate 103 extends towards the opposite first connecting plate 102, and a sliding cavity 104 is formed between the support plate 101, the first connecting plate 102 and the abutting plate 103; the adjusting and mounting assembly 3 comprises a sliding block 301 and a spring 302, the sliding block 301 is slidably arranged in the sliding cavity 104 in the vertical direction, one end of the spring 302 is fixedly connected with the sliding block 301, and the other end of the spring 302 abuts against the support plate 101; the sliding block 301 comprises a mounting portion 3011 and an abutting portion 3012, the abutting portion 3012 is connected to the two ends of the mounting portion 3011, the abutting portion 3012 abuts against the abutting plate 103, and the mounting portion 3011 is arranged protruding from the end surface of the abutting plate 103 away from the support plate 101, and the mounting portion 3011 is detachably connected with the mounting plate 2.

[0030] When the sliding block 301 slides in the sliding cavity 104 of the guide rail 1 in the vertical direction, the fan 4 on the mounting plate 2 can slide together with the sliding block 301. The one end of the spring 302 abuts against the support plate 101, and the spring 302 presses the abutting portion 3012 of the sliding block 301 at the abutting plate 103. When it is needed to change the position of the fan 4 on the guide rail 1, the mounting plate 2 is pressed towards the guide rail 1, the spring 302 is compressed under the pressure of the mounting plate 2, at this time, the abutting portion 3012 is no longer tightly attached to the abutting plate 103, and the fan 4 is in a movable state, so that the fan 4 can be moved. After the fan 4 is moved to a suitable position, the mounting plate 2 is released, the spring 302 restores, the abutting portion 3012 is pushed to the abutting plate 103 again, the sliding block 301 is pressed at the abutting plate 103, and the friction force between the abutting portion 3012 and the abutting plate 103 fixes the fan 4, so that the fan 4 is in a fixed state.

[0031] After the mounting plate 2 is pressed to compress the spring 302, the sliding block 301 is no longer tightly attached to the abutting plate 103, the position of the fan 4 on the transformer radiator can be adjusted as needed, the fan 4 does not need to be removed from the guide rail 1, and after the mounting plate 2 is released, the sliding block 301 is pressed at the abutting plate 103 by the spring 302 to fix the fan 4, so that the position of the fan 4 on the guide rail is conveniently adjusted and fixed, and the problems that the position of the fan on the fan support cannot be adjusted and the fan is troublesome to disassemble and assemble are solved.

[0032] Further, as shown in the drawings, Figure 3As shown, in an embodiment of the present application, the abutting plate 103 comprises a second connecting plate 1031 and an abutting edge strip 1032, one end of the second connecting plate 1031 is connected to the end of the first connecting plate 102 away from the support plate 101, the other end of the second connecting plate 1031 is connected with the abutting edge strip 1032, and the abutting edge strip 1032 is arranged to extend towards the support plate 101, and the abutting portion 3012 is provided with an abutting groove 30121; the abutting edge strip 1032 is inserted into the abutting groove 30121 and abuts against the abutting portion 3012.

[0033] The abutting portion 3012 is provided with the abutting groove 30121, the abutting edge strip 1032 is inserted into the abutting groove 30121 and cooperates with the abutting groove 30121, when it is needed to change the position of the fan 4 on the guide rail 1, the mounting plate 2 is pressed towards the guide rail 1, the spring 302 is compressed under the pressure of the mounting plate 2, at this time, the abutting portion 3012 is no longer closely attached to the abutting plate 103, the abutting edge strip 1032 is separated from the abutting groove 30121, and the fan 4 is in a movable state at this time, so that the fan 4 can be moved. After the fan 4 is moved to a suitable position, the mounting plate 2 is released, the spring 302 is restored, the abutting portion 3012 is pushed to the abutting plate 103 again, the sliding block 301 is pressed against the abutting plate 103, and the friction force between the abutting portion 3012 and the abutting plate 103 fixes the fan 4, so that the fan 4 is in a fixed state. In addition, the abutting edge strip 1032 also plays a guiding role for the sliding block 3, so that the sliding block 3 can slide along the vertical direction.

[0034] Further, as shown in Figure 3 and 4 , in an embodiment of the present application, the mounting portion 3011 is provided with a guide column 303 at the end towards the support plate 101, and the spring 302 is sleeved on the guide column 303.

[0035] The spring 302 is sleeved on the guide column 303, under the action of the self-weight of the fan 4, the spring 302 will be slightly deformed in the vertical direction under the tendency of the downward movement of the sliding block 301, the spring 302 is sleeved on the guide column 303, so that the deformation of the spring 302 in the vertical direction is prevented, and the loss of the restoring ability of the spring 302 caused by the metal fatigue after long-time use is prevented. In addition, the guide column 303 can also enable the spring 302 to be compressed and restored along the direction of the guide column 303 when the sliding block 301 is pressed, so that the stability when the position of the fan 4 is adjusted is improved.

[0036] Further, as shown in Figures 3 to 5 , in an embodiment of the present application, the mounting portion 3011 is provided with a first mounting hole 3013 penetrating along the thickness direction of the mounting portion 3011, and the mounting plate 2 is provided with a second mounting hole 201 penetrating along the thickness direction of the mounting plate 2; the adjusting mounting assembly 3 further comprises a first fastener 304, and the first fastener 304 penetrates through the second mounting hole 201 and the first mounting hole 3013.

[0037] The first fastener 304 passes through the second mounting hole 201 and the first mounting hole 3013 to detachably mount the mounting plate 2 to the mounting part 3011.

[0038] Specifically, the first fastener 304 is a bolt, which is easy to install. The first mounting hole 3013 is a threaded hole, and the first fastener 304 is threadedly connected to the first mounting hole 3013.

[0039] Furthermore, such as Figures 3 to 6 As shown, in one embodiment of the present invention, the support plate 101 is provided with a plurality of third mounting holes 1011 at intervals along its own length direction, and the first fastener 304 passes through the second mounting hole 201, the first mounting hole 3013 and the corresponding third mounting hole 1011 in sequence.

[0040] The first fastener 304 passes through the third mounting hole 1011 and bears most of the weight of the fan 4. The spring 302 keeps the slider 301 pressed tightly against the abutment plate 103, further enhancing the stability of the fan 4's positioning. When it is necessary to move the fan 4, the first fastener 304 must first be loosened to disengage it from the third mounting hole 1011. At this time, the spring 302 still presses the slider 301 against the abutment plate 103. The friction between the abutment part 3012 and the abutment plate 103 supports the positioning of the fan 4, ensuring that the fan 4 will not fall directly after the first fastener 304 is loosened. Pressing the mounting plate 2 towards the guide rail 1 compresses the spring 302 under the pressure of the mounting plate 2. At this time, the abutment part 3012 is no longer pressed tightly against the abutment plate 103, and the fan 4 can be moved. After the fan 4 is moved to the appropriate position and the first fastener 304 is aligned with the third mounting hole 1011, the mounting plate 2 is released, the spring 302 returns to its original state, and the slider 301 is pushed back towards the abutment plate 103, pressing the slider 301 firmly against the abutment plate 103. The friction between the abutment part 3012 and the abutment plate 103 fixes the fan 4. At this time, the first fastener 304 is tightened so that the first fastener 304 enters the corresponding third mounting hole 1011 for positioning. During the process of moving the fan 4, when the first fastener 304 is loosened, the fan 4 will not fall due to losing connection with the guide rail 1, making the position adjustment of the fan 4 safe and convenient.

[0041] Furthermore, such as Figures 5 to 7 As shown, in one embodiment of the present invention, the mounting plate 2 includes a first frame strip 202 and a second frame strip 203 arranged symmetrically in pairs. The first frame strip 202 is arranged in the vertical direction, and the second frame strip 203 is arranged in the horizontal direction. The first frame strip 202 and the second frame strip 203 enclose a ventilation cavity 204. A second mounting hole 201 is provided in the second frame strip 203.

[0042] The first frame strip 202 and the second frame strip 203 enclose the ventilation cavity 204, and specifically, the output end of the fan 4 corresponds to the ventilation cavity 204, and the wind blown by the fan 4 passes through the ventilation cavity 204 to play a heat dissipation role on the transformer.

[0043] Further, as shown in the utility model one embodiment, Figures 5 to 8 The first frame strip 202 is provided with a fourth mounting hole 2021 along the thickness direction of the first frame strip 202, the fan 4 comprises an outer frame body 401, the outer frame body 401 is provided with a fifth mounting hole 4011, and the second fastener 5 passes through the fifth mounting hole 4011 and the fourth mounting hole 2021.

[0044] The second fastener 5 passes through the fifth mounting hole 4011 and the fourth mounting hole 2021 to detachably mount the fan 4 on the mounting plate 2.

[0045] Specifically, the second fastener 5 is a bolt, has the characteristics of convenient installation, the size of the fourth mounting hole 2021 is matched with the size of the fifth mounting hole 4011, and various specifications of the mounting plate 2 (that is, the fourth mounting hole 2021 of the mounting plate 2 corresponds to the size of the fifth mounting hole 4011 of the specification fan 4) corresponding to various specifications of the fan 4 are only required, so that the installation of various specifications of the fan 4 on the guide rail 1 can be realized, thereby meeting the installation requirements of various specifications of the fan 4.

[0046] Further, as shown in the utility model one embodiment, Figures 5 to 7 The guide rail 1 is provided with a plurality of guide rails 1, the plurality of guide rails 1 are arranged at intervals along the width direction of the mounting plate 2, and the second frame strip 203 is provided with a plurality of second mounting holes 201 corresponding to the guide rail 1 along the length direction of the second frame strip 203.

[0047] The mounting plate 2 is mounted on the plurality of guide rails 1 arranged at intervals, the plurality of second mounting holes 201 on the second frame strip 203 correspond to the guide rail 1 one by one, the fan 4 is mounted on the mounting plate 2, the stability of the fan 4 on the guide rail 1 can be improved, and the influence caused by vibration when the fan 4 works can be reduced.

[0048] Further, as shown in the utility model one embodiment, Figure 9 The adjustable mounting bracket for the transformer fan further comprises a connecting angle steel 6, the connecting angle steel 6 is connected with the end of the supporting plate 101, and the connecting angle steel 6 is used for mounting the guide rail 1 on the transformer.

[0049] The adjustable mounting bracket for the transformer fan is connected with the transformer through the connecting angle steel 6, the connection stability between the adjustable mounting bracket for the transformer fan and the transformer is improved, and the guide rail 1 will not be offset when the position of the transformer is adjusted.

[0050] The embodiment also provides a transformer, as shown in the utility model, Figure 9As shown, the guide rail 1 is fixedly connected to one side of the radiator 7.

[0051] Specifically, one end of the connecting angle steel 6 is connected to the end of the support plate 101, and the other end of the connecting angle steel 6 is connected to the radiator 7.

[0052] The transformer fan adjustable mounting bracket is mounted on one side of the radiator 7, the position of the fan 4 can be adjusted according to the condition of the transformer, the radiator 7 can obtain the best heat dissipation effect, and the performance of the transformer is improved. Further, a plurality of guide rails 1 can be arranged on the radiator 7, and a plurality of fans 4 can be arranged on the guide rails 1, so that the fans can be conveniently added according to the heat dissipation requirement.

[0053] The above embodiments only exemplarily illustrate the principle and effect of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A variable mounting bracket for a transformer fan, characterized by, The adjustable mounting bracket for the transformer fan comprises a guide rail, a mounting plate, an adjusting and mounting assembly and a fan, the fan is detachably connected with the mounting plate; The guide rail comprises a support plate, a first connecting plate and an abutting plate, the support plate is arranged along a vertical direction, two ends of the support plate in a width direction are respectively connected with the first connecting plates, one end of the first connecting plate away from the support plate is connected with the abutting plate, the abutting plate is arranged extending towards the opposite first connecting plate, a sliding cavity is formed between the support plate, the first connecting plate and the abutting plate; The adjusting and mounting assembly comprises a sliding block and a spring, the sliding block is arranged slidingly in the sliding cavity along a vertical direction, one end of the spring is fixedly connected with the sliding block, the other end of the spring is abutted with the support plate; The sliding block comprises a mounting portion and an abutting portion, the abutting portion is connected to two ends of the mounting portion, the abutting portion is abutted with the abutting plate, and the mounting portion is arranged protruding from an end surface of the abutting plate away from the support plate, the mounting portion is detachably connected with the mounting plate; The abutting plate comprises a second connecting plate and an abutting edge strip, one end of the second connecting plate is connected to one end of the first connecting plate away from the support plate, the other end of the second connecting plate is connected with the abutting edge strip, and the abutting edge strip is arranged extending towards the support plate, the abutting portion is provided with an abutting groove; The abutting edge strip is inserted into the abutting groove and abutted with the abutting portion; One end of the mounting portion towards the support plate is provided with a guide column, and the spring is sleeved on the guide column; The mounting portion is provided with a first mounting hole penetrating along a thickness direction of the mounting portion, and the mounting plate is provided with a second mounting hole penetrating along a thickness direction of the mounting plate; The adjusting and mounting assembly further comprises a first fastener, the first fastener passes through the second mounting hole and the first mounting hole; The support plate is provided with a plurality of third mounting holes spaced apart along a length direction of the support plate, and the first fastener sequentially passes through the second mounting hole, the first mounting hole and the corresponding third mounting hole.

2. The adjustable mounting bracket for a transformer fan of claim 1, wherein, The mounting plate comprises first frame strips and second frame strips arranged symmetrically in pairs, the first frame strips are arranged along a vertical direction, the second frame strips are arranged along a horizontal direction, and the first frame strips and the second frame strips enclose a ventilation cavity; The second mounting hole is arranged on the second frame strip.

3. The adjustable mounting bracket for a transformer fan of claim 2, wherein, The adjustable mounting bracket for the transformer fan further comprises a second fastener, the first frame strip is provided with a fourth mounting hole along a thickness direction of the first frame strip, the fan comprises an outer frame body, the outer frame body is provided with a fifth mounting hole, and the second fastener passes through the fifth mounting hole and the fourth mounting hole.

4. The adjustable mounting bracket for a transformer fan of claim 2, wherein, A plurality of guide rails are arranged, the plurality of guide rails are arranged spaced apart along a width direction of the mounting plate, and the second frame strip is provided with a plurality of second mounting holes corresponding to the guide rails along a length direction of the second frame strip.

5. The adjustable mounting bracket for a transformer fan of claim 1, wherein, The adjustable mounting bracket for the transformer fan further comprises a connecting angle steel, the connecting angle steel is connected with an end portion of the support plate, and the connecting angle steel is used for mounting the guide rail on a transformer.

6. A transformer, characterized by The heat sink and the adjustable mounting bracket of the transformer fan as claimed in any one of claims 1 to 5 are fixedly connected at one side of the heat sink.

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