JP2008070016A - Mounting structure for electrical equipment case body, and air conditioner equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure for an electrical equipment case body capable of improving assembling work efficiency, by reducing the number of components and the number of assembling processes, and of contributing to reduction of manufacturing cost. <P>SOLUTION: The electrical equipment case body 24, for receiving a circuit board 23, on which electronic/electric components 22 are mounted in a sealed state, has a heat transfer base plate portion 24a for heat radiation. The electrical equipment case body 24 is mounted and fixed to a partitioning plate 29, in a state of having a cooling pipe 26 disposed in between the heat transfer case plate portion 24a and the partitioning plate 29, on which the electrical equipment case body 24 is mounted and fixed, and the cooling pipe 26 is fixed in a state of being sandwiched and is held by the heat transfer case plate portion 24a and the partitioning plate 29. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mounting structure for an electrical component case body for mounting an electrical component case body such as an electrical component having a power device for inverter-controlling a compressor in the air conditioner, and an air conditioner including the mounting structure It is about.

  For example, in an air conditioner, an outdoor unit has a structure including a compressor that is inverter-controlled by an electrical component equipped with a power device. As shown in FIG. There is a structure in which a power device 2a composed of a diode, a power transistor, etc., and a circuit board 3 on which various electronic components 2 such as an electrolytic capacitor and a resistor are mounted are hermetically accommodated by an electrical component case body 4.

  The electrical component case body 4 includes a heat transfer case plate portion 4a made of aluminum or the like located on the lower surface side of FIG. 6 and a case main body portion 4b formed of other resin, and the heat transfer case plate portion 4a. The case main body 4b is detachably fixed to each other by screwing or the like.

  The circuit board 3 is detachably fixed to a board mounting portion appropriately provided in the electrical component case body 4 by screwing or the like. When the circuit board 3 is mounted in the electrical component case body 4, the circuit board 3 is a heat generating component. A certain power device 2a is configured to be in contact with the heat transfer case plate 4a in an electrically insulated state via an insulating sheet 5 or the like.

  Further, on the outer surface side of the heat transfer case plate portion 4a corresponding to the contact position of the power device 2a, the cooling pipe 6 through which the refrigerant in the air conditioner is circulated and guided is in contact with the pipe holding plate 7 or the like. Is arranged.

  Further, in the contact state of the cooling pipe 6, the electrical component case body 4 is screwed with a mounting screw 9 to a partition plate 8 that divides the fan chamber and the machine room in the outdoor unit as a case body mounting portion, for example. It is set as the structure attached and fixed detachably by.

  The heat generated in the electrical component case body 4 such as the power device 2a is cooled by the refrigerant flowing in the cooling pipe 6 mainly through the heat transfer case plate 4a.

  However, according to the mounting structure of the electrical component case body 4 as shown in FIG. 6, the cooling pipe 6 is attached to the heat transfer case plate portion 4 a in the electrical component case body 4 by the mounting screw 10 or the like with the piping holding plate 7. A pipe fixing process for fixing by attaching to the contact state, and a case body fixing process for fixing the electric component case body 4 to which the cooling pipe 6 is fixed to the partition plate 8 by means of mounting screws 9 are required, There was a drawback that the assembly workability was inferior.

  In addition, there is a problem that the pipe holding plate 7 for fixing the cooling pipe 6 and the mounting screw 10 for fixing the pipe holding plate 7 are required, and the number of parts increases.

  Therefore, the problem to be solved by the present invention is to provide an electrical equipment case mounting structure and its mounting structure, which can improve assembly workability by reducing the number of parts and the number of assembly processes, and can contribute to the reduction of manufacturing cost. Is to provide an air conditioner.

  The technical means for solving the above-described problem is to cool the electronic / electrical component outside the heat transfer base plate for heat dissipation in the electrical component case body that hermetically accommodates the circuit board on which the electronic / electrical component is mounted. In the mounting structure of the electrical component case body in which the electrical component case body is mounted and fixed to the case body mounting portion in a state where the cooling pipe is disposed, between the heat transfer case plate portion and the case body mounting portion. The electrical equipment case body is attached and fixed to the case body mounting portion with the cooling pipe being disposed on the cooling pipe, and the cooling pipe is fixed in a sandwiched state between the heat transfer case plate portion and the case body mounting portion. There is in point.

  Moreover, it is good also as a structure where the ditch | groove part for piping is formed in the arrangement position corresponding part of the said piping for cooling in the said heat-transfer case board part.

  Further, the cooling pipe may be made of a cylindrical pipe material, and the groove for the pipe may have an arc shape corresponding to the outer peripheral surface shape of the cooling pipe.

  Moreover, the air conditioner provided with the attachment structure of said electrical component case body may be sufficient.

  According to the mounting structure of the electrical component case body of the present invention, the electrical component case body with respect to the case body mounting portion in a state where the cooling pipe is disposed between the heat transfer case plate portion and the case body mounting portion. Since the cooling pipe is fixed in a sandwiched state between the heat transfer case plate and the case body mounting part, the cooling piping is mounted at the same time as the electrical equipment case body is fixed to the case body mounting part. Can be fixed in a clamped state between the heat transfer case plate and the case body mounting part, and the two steps of the pipe fixing process and case body fixing process as described above can be performed in a single process, reducing the number of assembly processes. As a result, assembly workability is improved.

  In addition, the pipe holding plate 7 and the mounting screw 10 as described above are not required, the number of parts can be reduced, and the manufacturing cost can be effectively reduced from the above.

  Furthermore, if the structure is such that a groove for piping is formed in the portion corresponding to the arrangement position of the cooling pipe in the heat transfer case plate, when the electrical component case body is mounted and fixed, it is cooled by the groove for piping. There is an advantage that the displacement of the pipe can be effectively prevented and the cooling pipe can be securely fixed at a desired position.

  Further, if the cooling pipe is made of a cylindrical pipe and the pipe concave groove has an arc shape corresponding to the outer peripheral surface shape of the cooling pipe, the heat transfer case plate part and the cooling pipe are mutually connected. The contact area can be effectively secured, and the deformation of the cooling pipe can be effectively prevented when the electrical component case body is fixed to the case body mounting part, and the cooling pipe can be more securely fixed, and further the thermal conductivity. This has the advantage that the cooling efficiency can be improved.

  Furthermore, according to the air conditioner provided with the mounting structure of the electrical component case body as described above, the same advantages as described above can be exhibited, and the cooling piping in the air conditioner can be used as a cooling piping for the electrical component case body. There is an advantage that can be used effectively.

  Hereinafter, the first embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the electrical component 21 arranged in the outdoor unit of the air conditioner is similar to the above in the diode and power. A circuit board 23 on which various power devices 22a composed of transistors or the like and various electronic / electrical components 22 such as electrolytic capacitors and resistors are mounted is housed in a so-called sealed state by an electrical component case body 24.

  Further, the electrical component case body 24 includes a heat transfer case plate portion 24a for heat dissipation made of aluminum or the like located on the lower surface side in FIG. 1 and a case main body portion 24b made of other resin. The plate 24a and the case main body 24b are detachably fixed to each other by screws or the like.

  Then, the circuit board 23 is detachably fixed to the board mounting portion appropriately provided in the electrical component case body 24 by screwing or the like, and the circuit board 23 is mounted in the electrical component case body 24 as described above. The power device 22a, which is a heat generating component, is configured to be in contact with the heat transfer case plate 24a in an electrically insulated state via the insulating sheet 25 or the like.

  Further, on the outer surface side corresponding to the contact position of the power device 22a in the heat transfer case plate portion 24a, an arc shape corresponding to the outer peripheral surface shape of the cooling pipe 26 made of a cylindrical tube material through which the refrigerant in the air conditioner is circulated and guided. The concave groove portion 28 for piping is formed along the arrangement direction of the power device 22a.

  As shown in FIG. 1, for example, a partition plate 29 that partitions a fan chamber and a machine chamber in an air conditioner as a case body attaching portion, and a heat transfer case plate portion 24 a of the electrical component case body 24. The cooling pipe 26 is disposed therebetween, and the electrical component case body 24 is attached to the partition plate 29 in a state in which the outer peripheral surface of the cooling pipe 26 is fitted in the pipe recessed groove 28 formed in the heat transfer case plate 24a. In addition, the mounting screw 30 is detachably mounted and fixed from one direction, that is, from the upper side in FIG. 1, by screwing and fastening the mounting screw 30 into a female screw hole formed at a predetermined position of the partition plate 29. It should be noted that at the time of screwing and fastening with the mounting screw 30, a structure in which the mounting screw 30 is screwed and fastened near the arrangement position of the cooling pipe 26 for the purpose of preferentially fixing the cooling pipe 26.

  Here, in the fixed state of the partition plate 29 and the electrical component case body 24, the cooling pipe 26 is fixed in a sandwiched state between the partition plate 29 and the heat transfer case plate portion 24a at the position of the concave groove portion 28 for piping. ing.

  Moreover, in FIG. 1, 31 is a cylindrical spacer having an appropriate length for ensuring a desired gap between the partition plate 29 and the heat transfer case plate portion 24a.

  In addition, in FIG. 1, although the partition plate 29 is arrange | positioned horizontally, it is the same even if arrange | positioned vertically.

  The present embodiment is configured as described above, and at the same time as mounting and fixing the electrical component case body 24 to the partition plate 29, the cooling pipe 26 can also be fixed in a sandwiched state by the heat transfer case plate portion 24a and the partition plate 29. The two-stage process of the pipe fixing process and the case body fixing process as described above is not necessary, and can be performed in a single process, reducing the number of assembly processes and improving the assembly workability.

  Therefore, the pipe holding plate 7 and the mounting screw 10 as described above are not required, the number of parts can be reduced, and the manufacturing cost can be effectively reduced from the above.

  Further, since the cooling pipe 26 is fitted in the pipe groove 28 when the electrical component case body 24 is fixed to the partition plate 29, the displacement of the cooling pipe 26 can be effectively prevented, and the cooling pipe 26 is cooled. There is an advantage that the pipe 26 can be reliably fixed at a desired position.

  Moreover, since the shape of the concave groove portion 28 for piping is formed in an arc shape corresponding to the outer peripheral surface shape of the cooling pipe 26, the contact between the heat transfer case plate 24a and the cooling pipe 26 is surface contact. Thus, the contact area can be effectively secured, the deformation of the cooling pipe 26 when the electric component case body 24 is fixed to the partition plate 29 can be effectively prevented, and the cooling pipe 26 can be more reliably secured at the desired position. There is an advantage that can be fixed.

  Further, since the heat transfer case plate 24a and the cooling pipe 26 are in a surface contact state and the contact area can be effectively secured, the heat conductivity between them can be improved, and the electrical equipment case body such as the power device 22a can be achieved. There is also an advantage that the cooling efficiency of the heat generated in 24 can be improved.

  Furthermore, there is an advantage that the cooling pipe in the air conditioner can be effectively used as the cooling pipe 26 for cooling the electrical component case body 24.

  Further, since the electrical component case body 24 is fixed to the partition plate 29 by the mounting screw 30 near the position where the cooling pipe 26 is disposed, it is compared with the structure fixed at the four corners as shown in FIG. Thus, there is an advantage that the fixed state of the cooling pipe 26 can be secured more effectively.

  3 and 4 show the mounting structure of the electrical component case body 24 according to the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, the cooling pipe 26 fixed in a sandwiched state between the heat transfer case plate portion 24a of the electrical component case body 24 and the partition plate 29 is configured in a U shape having an outward path and a return path. It is structured. Other configurations are substantially the same as those in the first embodiment.

  Accordingly, in this embodiment as well, as in the first embodiment, the number of assembly steps can be reduced to improve the assembly workability, and even when a plurality of cooling pipes 26 are arranged in a sandwiched state. The pipe holding plate 7 and the mounting screw 10 as described above are unnecessary, and the number of parts can be reduced, and the manufacturing cost can be effectively reduced.

  Further, the effect of preventing the displacement of the cooling pipe 26 and the effect of preventing the deformation can be effectively exhibited, the cooling pipe 26 can be more securely fixed at a desired position, and the cooling efficiency of the heat generated in the electrical component case body 24 can be improved. There is an advantage that improvement can be achieved.

  FIG. 5 shows the mounting structure of the electrical component case body 24 as the third embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  That is, in the present embodiment, in the partition plate 29 of the first embodiment, in the direction corresponding to the mounting position of the mounting screw 30 for mounting and fixing the electrical component case body 24, in the direction of the heat transfer case plate portion 24a. Case body support portions 29a that bulge to a predetermined height are formed by press molding or the like.

  Similarly to the first embodiment, the female screw formed on the case body support portion 29a in a state where the cooling pipe 26 is sandwiched between the position of the piping concave groove portion 28 of the heat transfer case plate portion 24a and the partition plate 29. The electrical component case body 24 is detachably fixed by screwing and fastening the mounting screw 30 into the hole. At this time, the left and right side portions in FIG. 5 are in contact with the upper surface of the case body support portion 29a and are not fixed by the mounting screws 30. Other configurations are substantially the same as those in the first embodiment.

  Therefore, also in the present embodiment, as in the first embodiment, the number of assembling steps can be reduced, the assembling workability can be improved, the number of parts can be reduced, and the manufacturing cost can be effectively reduced. In particular, since each case body support portion 29a is in contact with the heat transfer case plate portion 24a when the electrical component case body 24 is fixed to the partition plate 29, the mounting screws 30 on the left and right side portions are provided. Even if the fixing by is omitted, no rattling or the like occurs, and the spacer 31 is not necessary, and the number of parts can be further reduced.

  Further, the effect of preventing displacement and the effect of preventing deformation of the cooling pipe 26 can be effectively exhibited, the cooling pipe 26 can be more securely fixed at a desired position, and the cooling efficiency of heat generated in the electrical component case body 24 can be improved. There is also an advantage that improvement can be achieved.

  In addition, in each said embodiment, although the whole lower surface side of the electrical component case body 24 in each figure has shown the structure made into the heat-transfer case board part 24a, it arrange | positions in a part corresponding to the arrangement position of the power device 22a. It may be a structured.

  Moreover, although the structure which fixes the electrical component case body 24 with respect to the partition plate 29 with the attachment screw 30 is shown, the one end part side is made into the latching structure which can be engaged / removed, and the other end part side is made into the latching state. A structure for fixing with the mounting screw 30 may be used, and a fixing structure may be adopted as appropriate.

  Furthermore, although the mounting structure of the electrical component case body 24 of the electrical component 21 in the air conditioner is shown, the same mounting structure may be adopted for the electrical component case body having other heat generating components.

  Moreover, although the case main body part 24b and the heat transfer case board part 24a are shown in the structure formed so that attachment or detachment was possible, the upper surface side in the case main part 24b was fixed detachably similarly to the heat transfer case board part 24a. It is good also as a lid plate part structure.

  Furthermore, the shape of the concave groove portion 28 for piping is shown as an arc-shaped structure corresponding to the outer peripheral surface shape of the cooling piping 26, but may be a slightly larger-diameter arc shape, The groove shape 28 may be a V-shaped groove or a rectangular groove shape, and is not limited to the groove shape of the embodiment, and may have a structure without such a groove shape 28 for piping.

It is a schematic sectional explanatory drawing concerning the 1st Embodiment of this invention. It is a top view of FIG. It is a schematic cross-sectional explanatory drawing concerning 2nd Embodiment. FIG. 4 is a plan view of FIG. 3. It is a schematic sectional explanatory drawing concerning 3rd Embodiment. It is a schematic sectional explanatory drawing which shows a reference example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Electrical component 22 Electronic electrical component 22a Power device 23 Circuit board 24 Electrical component case body 24a Heat-transfer case board part 24b Case main part 26 Cooling piping 28 Piping groove part

Claims (4)

The electronic / electrical component (22) is placed outside the heat-dissipating heat transfer base plate (24a) in the electrical component case body (24) that encloses the circuit board (23) on which the electronic / electrical component (22) is mounted. In the mounting structure of the electrical component case body in which the electrical component case body (24) is mounted and fixed to the case body mounting portion (29) with the cooling pipe (26) for cooling being disposed,
In the state where the cooling pipe (26) is disposed between the heat transfer case plate (24a) and the case body mounting portion (29), the electrical component is mounted on the case body mounting portion (29). A case body (24) is mounted and fixed, and a cooling pipe (26) is fixed in a sandwiched state between the heat transfer case plate (24a) and the case body mounting section (29). Body mounting structure. In the mounting structure of the electrical component case body according to claim 1,
A mounting structure for an electrical component case body, characterized in that a pipe groove (28) is formed in a portion corresponding to the arrangement position of the cooling pipe (26) in the heat transfer case plate (24a). In the mounting structure of the electrical component case body according to claim 2,
The electrical pipe case characterized in that the cooling pipe (26) is made of a cylindrical pipe material, and the concave groove part (28) for the pipe has an arc shape corresponding to the outer peripheral surface shape of the cooling pipe (26). Body mounting structure.   An air conditioner comprising the mounting structure for an electrical component case according to any one of claims 1 to 3.

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