JP5392552B2 - Refrigerant piping mounting structure - Google Patents

Description

  The present invention relates to a refrigerant pipe mounting structure for mounting a refrigerant pipe into which a refrigerant is introduced to a component to be cooled.

  When cooling an electrical component that generates heat, such as a power module, using a refrigerant pipe into which a refrigerant is introduced, heat transfer between the electrical component and the refrigerant pipe is realized by the following mounting structure. That is, as shown in FIG. 11, one surface of the heat transfer plate 107 is bonded with a screw 109 to a refrigerant jacket 105 formed by bonding a refrigerant pipe 103 to a metal mounting plate 101 such as aluminum. The electrical component 111 is fixed to the other surface with screws 113. The heat transfer plate 107 is supported on the printed circuit board 117 via the support body 115.

  However, since the screws 109 and 113 are frequently used, the attaching / detaching operation of the refrigerant jacket 105 and the heat transfer plate 107 and the heat transfer plate 107 and the electrical component 111 is complicated. Further, in a state where the refrigerant pipe 103 is fixed to the casing of the air conditioner not shown in the drawing, the refrigerant jacket 105 covers and overlaps the position where the electrical component 111 is mounted on the printed circuit board 117. For this reason, the refrigerant jacket 105 becomes an obstacle to handle the electrical component 111.

  In addition, the heat transfer plate 107 is interposed between the refrigerant jacket 105 and the electrical component 111 in the production line for assembling the air conditioner, the connection between the mounting plate 101 and the heat transfer plate 107, and the heat transfer plate 107. This is because the joining with the electrical component 111 can be performed in a separate process. However, since the number of operations for assembling the air conditioner is increased and both the refrigerant jacket 105 and the heat transfer plate 107 are indispensable, the cost of the air conditioner is unavoidable.

JP 2002-335091 A Japanese Utility Model Publication No. 04-074494 JP 2006-157042 A

  An object of the present invention is to provide a refrigerant pipe mounting structure that allows a refrigerant pipe to be easily attached to and detached from a component to be cooled and that is inexpensive to manufacture.

  In order to achieve the above object, the present invention provides a refrigerant pipe mounting structure for mounting a component to be cooled to a refrigerant pipe, wherein a pedestal portion on which the refrigerant pipe is positioned protrudes from a base portion joined to the component to be cooled. A conductive member; and an elastic member that extends from a base portion of the conductive member and presses the refrigerant pipe against the pedestal portion.

  Further, the present invention is characterized in that the elastic member is a pair of plate-like clips having a claw portion that is hooked to a base portion of the conductive member and sandwiching the refrigerant pipe.

  Further, in the present invention, a support plate that supports the refrigerant pipe is made to face the pedestal portion of the conductive member, and an opening that allows an elastic member extending from a base portion of the conductive member to enter the support plate is formed. It is characterized by that.

  Further, the present invention is a refrigerant pipe mounting structure for attaching a component to be cooled to a refrigerant pipe, a conductive member interposed between the refrigerant pipe and the component to be cooled, and a claw portion that is hooked on the conductive member And an elastic member that presses the refrigerant pipe against the conductive member.

  The present invention is also a refrigerant pipe mounting structure for attaching a part to be cooled to a refrigerant pipe, a conduction member interposed between the refrigerant pipe and the part to be cooled, and sandwiching the refrigerant pipe between the conduction members And an elastic member that extends from the support plate and presses the refrigerant pipe together with the conductive member against the support plate.

  According to the refrigerant pipe mounting structure of the present invention, the refrigerant pipe is pressed against the pedestal portion of the conductive member by the elastic member, so that the conductive member to which the cooled parts such as the power module are joined without using screws or the like. It is possible to secure a good heat transfer performance by attaching the refrigerant pipe and guiding the heat from the part to be cooled to the refrigerant pipe. In addition, since the mounting structure does not require a refrigerant jacket as in the prior art, it is easy to handle the parts to be cooled mounted on a printed circuit board or the like. Cost can be reduced.

  Further, when the elastic member is a pair of plate-like clips that sandwich the refrigerant pipe, the elastic member is elastically deformed so that the interval between the pair of plate-like clips is widened simply by pushing the refrigerant pipe between them. The refrigerant piping can be easily sandwiched between the members. Thereby, the operation | work which attaches refrigerant | coolant piping to a conduction member is completed. On the contrary, the refrigerant pipe can be easily detached from the conductive member simply by pulling out the refrigerant pipe from between the pair of plate clips. Further, when the elastic member has a claw portion that is hooked on the base portion of the conductive member, it is not necessary to use screws or the like to join the elastic member to the conductive member.

  Further, according to the refrigerant pipe mounting structure according to the present invention, the conductive member projects the pedestal from the base and the elastic member extends from the base of the conductive member, so that the base of the conductive member contacts the refrigerant pipe. The dimension of the elastic member extending to the position becomes relatively long. For this reason, the elastic deformation of the elastic member as described above is facilitated, so that a person who attaches / detaches the refrigerant pipe does not need to apply an excessive force to the refrigerant pipe. It can be prevented in advance. Moreover, according to the mounting structure, there is an advantage that a desired holding force for the elastic member to sandwich the refrigerant pipe can be obtained.

  Furthermore, according to the refrigerant pipe mounting structure according to the present invention, when the refrigerant pipe is supported by a support plate such as a sheet metal, the refrigerant pipe is connected to the conductive member by the elastic member while the elastic member is inserted into the opening. It can be pressed against the pedestal. For this reason, refrigerant piping can be attached to the conductive member to which the parts to be cooled are joined without using screws or the like. In addition, since the base portion of the conductive member and the support plate face each other, the support receives the reaction force when the elastic member is elastically deformed as described above, thereby preventing the above-described deformation or breakage. it can.

  Furthermore, according to the mounting structure of the refrigerant pipe according to the present invention, the elastic member is extended from the support plate opposed to the conductive member with the refrigerant pipe interposed therebetween, and the refrigerant pipe is pressed against the support plate together with the conductive member by the elastic member. There is no need to join the elastic member to the conductive member. Moreover, the above-described deformation or breakage can be prevented in advance by the support body receiving the force pressing the refrigerant pipe of the elastic member and the support body reinforcing the medium pipe.

(A) is sectional drawing which fractured | ruptured the attachment structure of the refrigerant | coolant piping which concerns on the 1st Embodiment of this invention in the longitudinal direction, (b) is sectional drawing fractured | ruptured in the width direction. The disassembled perspective view of the attachment structure of the refrigerant | coolant piping which concerns on the 2nd Embodiment of this invention. The side view which shows the assembly process of the attachment structure of the refrigerant | coolant piping which concerns on the 2nd Embodiment of this invention in order of (a)-(c). The side view which shows the assembly process of the one modification of the attachment structure of the refrigerant | coolant piping which concerns on the 2nd Embodiment of this invention in order of (a)-(c). (A) is a side view of the other modification of the attachment structure of the refrigerant | coolant piping which concerns on the 2nd Embodiment of this invention, (b) is a side view of the further modification. The side view which shows the assembly process of the attachment structure of the refrigerant | coolant piping which concerns on the 3rd Embodiment of this invention in order of (a), (b). The side view which shows the assembly process of the one modification of the attachment structure of the refrigerant | coolant piping which concerns on the 3rd Embodiment of this invention in order of (a), (b). The side view which shows the assembly process of the other modification of the attachment structure of the refrigerant | coolant piping which concerns on the 3rd Embodiment of this invention in order of (a), (b). (A) is a side view of the attachment structure of the refrigerant | coolant piping which concerns on the 4th Embodiment of this invention, (b) is a side view of the modification. (A) is a side view of the refrigerant pipe mounting structure applied as a sample for the heat transfer test, (b) is a side view of the comparative example, and (c) is a graph showing the results of the heat transfer test. (A) is sectional drawing which fractured | ruptured the attachment structure of the refrigerant pipe of a prior art example in the longitudinal direction, (b) is sectional drawing fractured | ruptured in the width direction.

  FIGS. 1A and 1B show a refrigerant pipe attachment structure 5 for attaching the refrigerant pipe 1 to the component to be cooled 3 as a first embodiment of the present invention. The refrigerant pipe mounting structure 5 includes a conductive member 11 that protrudes from a base 9 of a pedestal 7 on which the refrigerant pipe 1 is positioned, and an elastic member 13 that extends from the base 9 of the conductive member 11. Arrows L and W respectively indicate a longitudinal direction and a width direction described below.

  The conductive member 11 is formed by integrally forming a plate-like base 9 and a convex pedestal 7 using aluminum or the like excellent in thermal conductivity as a material. Further, the conductive member 11 is supported on the printed circuit board 17 via the support 15. The pedestal portion 7 is formed with a concave portion 19 having substantially the same curvature as the outer peripheral surface of the refrigerant pipe 1 in order to positively increase the area in close contact with the refrigerant pipe 1. The recess 19 is not essential, and the refrigerant pipe 1 may be formed so that the base 9 of the conductive member 11 has a flat shape and a flat shape in close contact therewith. As an example of the component to be cooled 3, a power module mounted on a printed circuit board 17 is shown. The component 3 to be cooled may be joined to the joining surface 21 on the opposite side of the refrigerant pipe 1 of the base 9 of the conductive member 11 with a screw 23. Reference numeral 25 indicates an insertion hole for inserting a screwdriver or the like.

  The elastic member 13 is a pair of plate-like clips 27 made of spring steel, and includes a fixed portion 31 fixed to the base 9 of the conductive member 11 with screws 29 and a head 33 formed by folding the tip. Have. The pair of plate clips 27 are positioned on the base portion 9 of the conductive member 11 so that the distance between the heads 33 is slightly narrower than the diameter of the refrigerant pipe 1. In addition, the pair of plate-like clips 27 has inclined surfaces 35 facing the inside of each head 33 in a substantially C shape. In a state in which the refrigerant pipe 1 is sandwiched between the pair of plate clips 27, the pair of plate clips 27 are elastically deformed so as to bend slightly in the direction in which the distance between the heads 33 increases, and the refrigerant pipe 1 The refrigerant pipe 1 is pressed against the pedestal portion 7 of the conductive member 11 by the inclined surface 35. It is preferable that a heat conductive sheet or a heat conductive grease described later is interposed between the refrigerant pipe 1 and the pedestal portion 7.

  When removing the refrigerant pipe 1 from the conductive member 11, it is only necessary to pull the refrigerant pipe 1 upward between the pair of plate clips 27 in the drawing. Due to this force, the pair of plate clips 27 are elastically deformed in the direction in which the distance between the heads 33 increases, so that the refrigerant pipe 1 passes between the heads 33 of the pair of plate clips 27, The pair of plate-like clips 27 is detached. Further, in order to attach the refrigerant pipe 1 to the conductive member 11, it is only necessary to push the refrigerant pipe 1 between the pair of plate clips 27. As a result, the pair of plate-like clips 27 are elastically deformed in the same manner as described above, so that the refrigerant pipe 1 passes between the respective heads 33 of the pair of plate-like clips 27 and hits the concave portion 19 of the pedestal portion 7. .

  According to the refrigerant pipe mounting structure 5 described above, the refrigerant pipe 1 is attached to the conductive member 11 to which the cooled part 3 is joined without using screws or the like, and heat is supplied from the cooled part 3 to the refrigerant pipe 1. Good guiding heat transfer performance can be ensured. In addition, since a conventional refrigerant jacket is not required, it is easy to handle the part to be cooled 3 mounted on the printed circuit board 17, and the manufacturing cost of the refrigerant pipe mounting structure 5 can be reduced.

  Further, the dimension in which the plate-like clip 27 extends from the fixed portion 31 fixed to the base portion 9 of the conductive member 11 to the inclined surface 35 in contact with the refrigerant pipe 1 is higher than the height at which the pedestal portion 7 of the conductive member 11 protrudes from the base portion 9. Is also set longer. This is because the plate-like clip 27 that is elastically deformed as described above can be easily bent without suppressing the holding force with which the elastic member 13 clamps the refrigerant pipe 1. Thereby, since the person who attaches / detaches the refrigerant pipe 1 does not need to apply an excessive force to the refrigerant pipe 1, it is possible to prevent the refrigerant pipe 1 from being deformed or broken.

  About other embodiment of this invention, the difference with the attachment structure 5 of refrigerant | coolant piping is described below. Moreover, the same name or code | symbol shall be continuously used for the element similar to the attachment structure 5 of refrigerant | coolant piping irrespective of the presence or absence of the description.

  A refrigerant pipe mounting structure 37 shown in FIG. 2 is a second embodiment of the present invention. The refrigerant pipe mounting structure 37 is formed by arranging a pair of a conductive member 41 formed with two groove portions 39 at positions sandwiching the pedestal portion 7 and a plate-like clip 45 having a claw portion 43 hooked on the groove portion 39. And an elastic member 47.

  The groove 39 of the conductive member 41 forms a step 49 that becomes a ridge on the inner surface thereof and extends in the longitudinal direction. The plate-like clip 45 forms a claw portion 43 that protrudes in the width direction by folding back an end portion opposite to the head portion 33. As shown in FIG. 3A, in order to attach the pair of plate-like clips 45 to the conductive member 41, it is only necessary to push the claw portion 43 into the groove portion 39. Accordingly, the claw portion 43 enters the depth of the groove portion 39 while being elastically deformed so as to contract in the width direction. As shown in FIG. 4B, the plate-like clip 45 never leaves the conductive member 41 in a state where the claw portion 43 is hooked on the step 49. For this reason, the screw 29 shown in FIG. 1B is unnecessary, and the number of parts of the refrigerant pipe mounting structure 37 can be reduced.

  Furthermore, the refrigerant pipe 1 can be attached to the conductive member 41 as shown in FIG. 3C by pushing the refrigerant pipe 1 between the pair of plate clips 45. In this state, tension is derived between the head 33 and the claw portion 43 of the plate clip 45 as a reaction of the downward force that the refrigerant pipe 1 receives from the inclined surface 35. This tension increases the frictional force between the claw portion 43 and the step 49, and the plate-like clip 45 is fixed to the groove portion 39 so as not to slide in the longitudinal direction.

  As shown in FIG. 4 (a), the root 53 is formed in the plate-like clip 51 by folding the end of the plate-like clip 51 opposite to the head 33 into an L shape, and the root 53 is fitted into the conductive member 55. Alternatively, an L-shaped slit portion 57 may be formed. Here, the L shape means a shape extending in the thickness direction and the width direction of the conductive member 55. In this case, as shown in FIG. 5B, when the slit portion 57 is squeezed by pressing the conductive member 55 in the thickness direction, the root portion 53 is pressed against the slit portion 57. Thereby, the plate-like clip 51 can be firmly fixed to the conductive member 55, and the refrigerant pipe 1 can be sandwiched between the pair of plate-like clips 51 as shown in FIG.

  Further, the plate-like clips described above are not necessarily paired. As shown in FIG. 5A, the recess 19 is formed in the conductive member 59 from which the pedestal portion is omitted, and the groove 39 is formed at a position separated from the recess 19 of the conductive member 59 in the width direction. The plate-like clip 61 applied as an elastic member has its claw portion 43 hooked to the groove portion 39, and the tip portion 63 extending from the claw portion 43 faces the concave portion 19 of the conductive member 59. In a state where the refrigerant pipe 1 is sandwiched between the tip portion 63 and the recess portion 19, the plate-like clip 61 is elastically deformed so as to be slightly bent in the direction in which the interval between the tip portion 63 and the conductive member 59 is widened, The refrigerant pipe 1 is pressed against the concave portion 19 of the conductive member 59 by the distal end portion 63. FIG. 2B shows an example in which the groove 39 is released toward the refrigerant pipe 1.

  A refrigerant pipe mounting structure 65 shown in FIGS. 6A and 6B is a third embodiment of the present invention. The refrigerant pipe mounting structure 65 is a pair of elastic members that extend from the base 9 of the conductive member 41 to the support plate 67 with the support plate 67 that supports the refrigerant pipe 1 facing the pedestal portion 7 of the conductive member 41. The opening 69 into which the head 33 of the plate-like clip 45 can enter is formed. The support plate 67 is not limited as long as it is a thin plate such as a steel plate. For example, a sheet metal (partition plate) for covering the refrigerant piping and the compressor housed in the casing of the air conditioner is used as the support plate 67. It may be applied as Further, the refrigerant pipe 1 may be fixed to the support plate 67 using a fastener such as a band.

  In order to attach the refrigerant pipe 1 to the conductive member 41, the pair of plate clips 45 are pressed against the refrigerant pipe 1 together with the conductive member 41, and the refrigerant pipe 1 enters between the pair of plate clips 45. The support plate 67 receives the force with which the pair of plate clips 45 are pressed against the refrigerant pipe 1, and the support plate 67 also receives the force when the refrigerant pipe 1 is removed from the conductive member 41. Since the support plate 67 reinforces the refrigerant pipe 1 in this way, deformation or breakage of the refrigerant pipe 1 due to the above-described force can be prevented in advance.

  As shown in FIGS. 7A and 7B, a curved portion 71 along the outer peripheral surface of the refrigerant pipe 1 may be formed at a location in contact with the refrigerant pipe 1 of the support plate 67. In this case, since the refrigerant pipe 1 can be fitted on the curved portion 71 of the support plate 67, the refrigerant pipe 1 can be directly positioned on the support plate 67 without using a fastener such as a band.

  As shown in FIGS. 8 (a) and 8 (b), the refrigerant pipe 1 is fitted into the curved portion 71 of the support plate 67, and these are placed between the concave portion 19 of the conductive member 59 and the tip portion 63 of the plate clip 61. It may be pinched. In this state, the plate-like clip 61 is elastically deformed so as to bend slightly in the direction in which the distance between the tip portion 63 and the conductive member 59 increases, and the refrigerant pipe 1 is pressed against the concave portion 19 of the conductive member 59 by the tip portion 63. It is done.

  A refrigerant pipe mounting structure 73 shown in FIG. 9A is a fourth embodiment of the present invention. The refrigerant pipe mounting structure 73 includes a conductive member 77 having a pedestal 75, a support plate 79 that faces the conductive member 77 with the refrigerant pipe 1 interposed therebetween, and an elastic member 81 that extends from the support plate 79.

  Both side surfaces 83 of the pedestal portion 75 are inclined so as to be separated from each other as the pedestal portion 75 moves in a direction protruding from the base portion 9. The elastic member 81 is formed by arranging a pair of plate-like clips 87 on which the latching portions 85 are formed. The pair of plate clips 87 are positioned on the support plate 79 so that the interval between the respective latching portions 85 is slightly narrower than the width of the pedestal portion 7. Further, the pair of plate-like clips 87 has inclined surfaces 89 that are inclined along the both side surfaces 83 inside the respective latching portions 85. In a state where the pedestal portion 75 is sandwiched between the pair of plate clips 87, the pair of plate clips 87 are elastically deformed so as to bend slightly in the direction in which the interval between the respective latch portions 85 is widened, and the conductive member When 77 receives a downward force from the inclined surface 89 in the drawing, the refrigerant pipe 1 is pressed against the support plate 79 together with the conductive member 77.

  As shown in FIG. 9B, a conductive member 91 in which the pedestal portion is omitted may be applied to the refrigerant pipe mounting structure 73. In this case, the pair of plate-like clips 93 are arranged on the support plate 79 so that the interval between the respective latching portions 85 is slightly narrower than the entire width of the conductive member 91. In a state where the conductive member 91 is sandwiched between the pair of plate clips 93, the conductive member 91 receives a downward force from the inclined surface 89 in the drawing, whereby the refrigerant pipe 1 and the support plate 79 together with the conductive member 91 are supported. Pressed against.

  Next, a measurement test for thermal resistance will be described. As shown in FIG. 10A, a heat conductive sheet 97 is interposed between the pedestal 7 of the conductive member 91 and the refrigerant pipe 95 having a diameter of 6.4 mm, and the refrigerant pipe 95 is connected to the conductive member 91 by the plate-like clip 61. A first sample pressed against is prepared. The base of the plate-like clip 61 is fixed to the conductive member 91 with screws or the like. The heat conductive sheet 97 is formed by molding an elastic material such as rubber excellent in heat conduction into a strip shape having a thickness of 0.5 mm. As shown in FIG. 5B, a second sample in which a heat conductive sheet 97 is interposed between the conductive member 99 and the refrigerant pipe 95, and the refrigerant pipe 95 is pressed against the conductive member 99 by a pair of plate-like clips 27. Prepare.

  Water at 25 ° C. is caused to flow through the refrigerant pipes 95 of the first sample and the second sample, respectively, and the thermal resistance between the first sample conduction member 91 and the refrigerant pipe 95, and the second sample conduction member. When the value of the thermal resistance between 99 and the refrigerant pipe 95 was measured, the results indicated by the A and B lines in the graph of FIG. Although the thermal resistance of the 1st sample which A line shows is a little higher than the thermal resistance of the 2nd sample which B line shows, a big difference is not recognized by these. Moreover, the A line and the B line show a tendency that the thermal resistance decreases as the flow rate of the water flowing through the refrigerant pipe 95 increases.

  Subsequently, the heat conductive sheet 97 is replaced with heat conductive grease. That is, thermal conductive grease is interposed between the refrigerant pipe 95 of the first sample and the pedestal portion 7 of the conductive member 91 and between the refrigerant pipe 95 of the second sample and the conductive member 99. And when the thermal resistance was measured similarly to the above, the result shown with C line and D line was obtained. Although there is no significant difference between the thermal resistance of the first sample indicated by the C line and the thermal resistance of the second sample indicated by the D line, when comparing the A line and the C line and the B line and the D line respectively, It can be seen that the thermal resistance can be halved when the thermal grease is applied.

  It should be noted that the present invention can be implemented in a mode in which various improvements, modifications, or variations are added based on the knowledge of those skilled in the art without departing from the spirit of the present invention. Moreover, you may implement with the form which substituted any invention specific matter to the other technique within the range which the same effect | action or effect produces. For example, the materials, shapes, or dimensions of the conductive member and the elastic member described above are not limited. Further, in consideration of the heat generation amount of the component to be cooled or the size of the component to be cooled, various refrigerant pipes having different diameters are prepared, and refrigerant pipes that can be selected from these refrigerant pipes are You may apply to the attachment structure of the refrigerant | coolant piping which concerns on embodiment.

  INDUSTRIAL APPLICABILITY The present invention is a technique that is useful for equipping any device equipped with an electrical component that generates heat with a refrigerant pipe for cooling the electrical component.

  DESCRIPTION OF SYMBOLS 1,95 ... Refrigerant piping, 3 ... Parts to be cooled, 5, 37, 65, 73 ... Refrigerant piping mounting structure, 7, 75 ... Base portion, 9 ... Base, 11, 41, 55, 59, 77, 91, 99 ... conductive member, 13, 47, 81 ... elastic member, 15 ... support, 17 ... printed circuit board, 19 ... recessed portion, 21 ... bonding surface, 23, 29 ... screw, 27, 45, 51, 61, 87, 93 ... Plate-like clip, 31 ... Fixing part, 33 ... Head, 35, 89 ... Inclined surface, 39 ... Groove part, 43 ... Claw part, 49 ... Step, 53 ... Root part, 57 ... Slit part, 63 ... Tip part, 67 79 ... support plate, 69 ... opening, 71 ... curved part, 83 ... both side surfaces, 85 ... latching part, 97 ... heat conduction sheet.

Claims (3)

A refrigerant pipe mounting structure for attaching a component to be cooled to the refrigerant pipe,
A conductive member having a base joined to the component to be cooled and a pedestal that projects from the base and the refrigerant pipe is positioned;
An elastic member extending from the base of the conductive member and pressing the refrigerant pipe against the pedestal;
Equipped with a,
The elastic member is a pair of plate-like clips that sandwich the refrigerant pipe between each other, and each of the plate-like clips has a claw portion that is hooked to the base portion of the conductive member at one end thereof,
The two plate-like clips are arranged to face each other with the pedestal portion interposed therebetween,
The refrigerant pipe mounting structure, wherein the refrigerant pipe enters the opposite area of the two plate-like clips from the other end side of the two plate-like clips and is pressed against a pedestal portion existing in the opposite area . Each of the plate-like clips is formed in a bent portion bent in a mountain shape so that the other end portion is folded back to the one end portion side and the folded portion projects toward the opposing plate-like clip. Have been
After the refrigerant pipe entering the opposing region of the two plate-like clips from the other end side passes through the tops of the two bent portions of the two plate-like clips, the slope existing on the one end side of the mountain-like clips The mounting structure according to claim 1, wherein the mounting structure is pressed against the pedestal portion.   The support plate for supporting the refrigerant pipe is opposed to a pedestal portion of the conductive member, and an opening for allowing an elastic member extending from a base portion of the conductive member to enter the support plate is formed. Item 3. The refrigerant pipe mounting structure according to Item 1 or 2.

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