JP5263381B2 - Refrigeration unit outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of a refrigeration apparatus, and more particularly to an outdoor unit of a refrigeration apparatus including a heat exchanger made of aluminum or aluminum alloy.

  In recent years, in order to reduce the weight of a heat exchanger, aluminum or an aluminum alloy is sometimes used not only for the fins of the heat exchanger but also for the heat transfer tubes and header collecting tubes of the heat exchanger. On the other hand, a heat exchanger made of aluminum or aluminum alloy is housed in a casing such as an outdoor unit. This casing is made of a non-aluminum metal other than aluminum or aluminum alloy because of advantages such as ease of processing and cost. For example, a steel plate is generally used.

  Such direct contact of the non-aluminum metal with the heat exchanger made of aluminum or aluminum alloy causes corrosion of the heat exchanger. Therefore, for example, as described in Patent Document 1 (Japanese Patent Laid-Open No. 7-234088), an aluminum or aluminum alloy bracket is conventionally fixed to a header collecting pipe of an aluminum or aluminum alloy heat exchanger. A heat exchanger is attached to a non-aluminum metal such as an automobile body through the aluminum or aluminum alloy bracket.

  However, in such a configuration, a portion where the bracket made of aluminum or aluminum alloy and the non-aluminum metal are in contact causes corrosion of the bracket made of aluminum or aluminum alloy. Corrosion of the bracket made of aluminum or aluminum alloy causes problems such as poor appearance and loose mounting of the heat exchanger.

  An object of the present invention is to prevent corrosion of an aluminum or aluminum alloy bracket for mounting an aluminum or aluminum alloy heat exchanger.

  The outdoor unit of the refrigeration apparatus according to the first aspect of the present invention includes an aluminum or aluminum alloy heat exchanger, a fixing portion directly attached to the heat exchanger, and a through hole for fixing to a non-aluminum metal structural component And a bracket made of aluminum or aluminum alloy having a fixing portion having a non-metallic member for interposing between the fixing portion of the bracket fixed to each other and the structural component so as to bring them into a non-contact state An outdoor unit of a refrigeration apparatus, which is a non-aluminum metal locking part having an outer shape smaller than the through-hole of the fixing part, and a non-metallic member for fixing the bracket fixing part to the structural part in cooperation with the locking part. The non-metallic member is made of aluminum or aluminum in a state in which the locking part penetrates the through hole of the fixed portion. To maintain a non-contact state with the alloy of the bracket and the non-aluminum metal fastening elements.

  In addition, the nonmetallic member here includes a member made of a polymer material such as a resin member or a rubber member, or a member made of a nonmetallic inorganic material such as a ceramic member.

  In the outdoor unit of the refrigeration apparatus according to the first aspect, the non-metallic member is fixed in a state where the bracket made of aluminum or aluminum alloy is fixed without contacting the non-aluminum metal structural component via the non-metallic member. The locking part whose outer shape is smaller than the outer shape of the through hole can be maintained in a non-contact state with respect to the bracket made of aluminum or aluminum alloy. Since the non-aluminum metal locking part does not contact the bracket made of aluminum or aluminum alloy, corrosion of the bracket due to corrosion between the non-aluminum metal and the aluminum metal is prevented.

  The outdoor unit of the refrigeration apparatus according to the second aspect of the present invention is the outdoor unit of the refrigeration apparatus according to the first aspect, further comprising a non-aluminum metal housing for housing an aluminum or aluminum alloy heat exchanger. The non-aluminum metal casing is a non-aluminum metal structural part.

  In the outdoor unit of the refrigeration apparatus according to the second aspect, it can be fixed to a non-aluminum metal housing with a bracket made of aluminum or aluminum alloy via a non-metal member.

  The outdoor unit of the refrigeration apparatus according to the third aspect of the present invention is an outdoor unit of the refrigeration apparatus according to the second aspect, wherein the nonmetallic member is a sandwich structure that sandwiches the fixing portion of the bracket made of aluminum or aluminum alloy from both sides. The latching component and the latched structure fasten the sandwiching structure of the non-metallic member and the fixing portion of the bracket made of aluminum or aluminum alloy.

  In the outdoor unit of the refrigeration apparatus according to the third aspect, since the fixing portion of the bracket is fastened while being sandwiched by the sandwiching structure of the non-metallic member, the bracket can be strongly fixed by the non-metallic member, and the heat exchanger Can be firmly fixed.

  The outdoor unit of the refrigeration apparatus according to the fourth aspect of the present invention is the outdoor unit of the refrigeration apparatus according to the third aspect, wherein the locking part is a male screw made of non-aluminum metal, and the locked structure is a structural part. Is a separate body, which is a nut capable of locking a male screw, a mounting plate having a screw hole capable of locking a male screw, or a female screw portion of a non-metallic member capable of locking a male screw.

  In the outdoor unit of the refrigeration apparatus according to the fourth aspect, a locking part having a required strength can be obtained at low cost by using a male screw made of non-aluminum metal.

  The outdoor unit of the refrigeration apparatus according to the fifth aspect of the present invention is the outdoor unit of the refrigeration apparatus according to the fourth aspect, wherein the mounting plate is subjected to burring on the screw hole.

  In the outdoor unit of the refrigeration apparatus according to the fifth aspect, since the screw hole is subjected to burring processing, the male screw can be stopped only by the mounting plate, and the number of parts can be reduced.

  The outdoor unit of the refrigeration apparatus according to the sixth aspect of the present invention is the outdoor unit of the refrigeration apparatus according to any one of the first to fifth aspects, wherein the bracket made of aluminum or aluminum alloy includes a plurality of fixing portions. Have.

  In the outdoor unit of the refrigeration apparatus according to the sixth aspect, the bracket can be fixed at a plurality of locations using a plurality of fixing portions, so that the stability of fixing the heat exchanger can be improved.

  In the outdoor unit of the refrigeration apparatus according to the first aspect, the corrosion of the aluminum or aluminum alloy bracket for mounting the heat exchanger made of aluminum or aluminum alloy can be prevented. Therefore, it is possible to prevent problems such as poor appearance and looseness in the installation of the heat exchanger.

  In the outdoor unit of the refrigeration apparatus according to the second aspect, the outdoor unit can be easily made compact.

  In the outdoor unit of the refrigeration apparatus according to the third aspect, the heat exchanger can be firmly fixed by the sandwiching structure of the nonmetallic member, and the effect of preventing the occurrence of problems such as loose mounting of the heat exchanger is improved. Can do.

  In the outdoor unit of the refrigeration apparatus according to the fourth aspect, since the locking parts having the required strength can be obtained at low cost, the outdoor unit can be provided at low cost.

  In the outdoor unit of the refrigeration apparatus according to the fifth aspect, the manufacturing cost of the outdoor unit can be reduced by reducing the number of parts.

  In the outdoor unit of the refrigeration apparatus according to the sixth aspect, the fixing of the heat exchanger is stabilized, so that problems such as the generation of noise due to rattling of the heat exchanger can be prevented.

The circuit diagram for demonstrating the outline | summary of a structure of the air conditioning apparatus which concerns on one Embodiment. The perspective view which shows the external appearance of an outdoor unit. The typical top view which shows the outdoor unit of the state which removed the top plate. The typical rear view which shows schematic structure of an outdoor heat exchanger. The fragmentary sectional view for demonstrating the structure of an outdoor heat exchanger. The expanded sectional view for demonstrating the structure of the heat exchange part of an outdoor heat exchanger. The expansion side view of a fan room side plate. (A) The perspective view which shows one form of the bracket made from aluminum, (b) is a top view of a bracket, (c) is a front view of a bracket, (d) The side view of a bracket. The partial expansion perspective view which shows the bracket brazed to the header collecting pipe. (A) The perspective view which shows the other form of the bracket made from aluminum, (b) The top view of a bracket, (c) The front view of a bracket, (d) The side view of a bracket. (A) Top view of resin cover, (b) Front view of resin cover, (c) Bottom view of resin cover. (A) Left side view of resin cover, (b) Rear view of resin cover, (c) Right side view of resin cover. 12A is a cross-sectional view taken along line II in FIG. 12B, FIG. 12B is a cross-sectional view taken along line II-II in FIG. 12B, and FIG. 12C is a cross-sectional view taken along line III-III in FIG. FIG. (A) Top view of a mounting plate, (b) Front view of a mounting plate. (A) Left side view of mounting plate, (b) Right side view of mounting plate. An exploded view of the bracket, resin cover and mounting plate. The perspective view which shows the state in which the bracket, the resin cover, and the attachment board are attached. The perspective view which shows the state of the outdoor unit from which unit casings other than a baseplate were removed.

(1) Overall Configuration of Air Conditioner As a refrigeration apparatus according to one embodiment of the present invention, a refrigeration apparatus used in an air conditioner will be described. FIG. 1 is a circuit diagram showing an outline of an air conditioner. The air conditioner 1 includes an outdoor unit 2 and an indoor unit 3. This air conditioner 1 is an apparatus used for air conditioning of each room in a building by performing a vapor compression refrigeration cycle operation. The air conditioner 1 includes an outdoor unit 2 as a heat source unit, an indoor unit 3 as a utilization unit, and refrigerant communication tubes 6 and 7 that connect the outdoor unit 2 and the indoor unit 3.

  In the air conditioner 1 configured by connecting the outdoor unit 2, the indoor unit 3, and the refrigerant communication pipes 6 and 7, the refrigeration apparatus includes a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an expansion valve. 14, the indoor heat exchanger 4 and the accumulator 15 are connected by refrigerant piping. A refrigerant is sealed in the refrigeration apparatus, and a refrigeration cycle operation is performed in which the refrigerant is compressed, cooled, decompressed, heated and evaporated, and then compressed again. During operation, the liquid refrigerant side closing valve 17 and the gas refrigerant side closing valve 18 of the outdoor unit 2 connected to the refrigerant communication pipes 6 and 7 are opened.

  During the cooling operation, the four-way switching valve 12 is in the state indicated by the solid line in FIG. 1, that is, the discharge side of the compressor 11 is connected to the gas side of the outdoor heat exchanger 13 and the suction side of the compressor 11 is the accumulator 15. The gas refrigerant side closing valve 18 and the refrigerant communication pipe 7 are connected to the gas side of the indoor heat exchanger 4. In the cooling operation, the air conditioner 1 uses the outdoor heat exchanger 13 as a refrigerant condenser compressed in the compressor 11 and the indoor heat exchanger 4 as a refrigerant evaporator condensed in the outdoor heat exchanger 13. To function as.

  During heating operation, the four-way switching valve 12 is in the state indicated by the broken line in FIG. And the suction side of the compressor 11 is connected to the gas side of the outdoor heat exchanger 13. In the heating operation, the air conditioner 1 uses the indoor heat exchanger 4 as a refrigerant condenser compressed in the compressor 11 and the outdoor heat exchanger 13 as a refrigerant evaporator condensed in the indoor heat exchanger 4. To function as.

(2) Detailed configuration of air conditioner (2-1) Indoor unit The indoor unit 3 is installed on a wall surface of the room by wall hanging or the like, or embedded or suspended in a ceiling of a room such as a building. The indoor unit 3 has an indoor heat exchanger 4 and an indoor fan 5. The indoor heat exchanger 4 is, for example, a cross fin type fin-and-tube heat exchanger composed of heat transfer tubes and a large number of fins, and functions as a refrigerant evaporator during cooling operation to cool indoor air. In the heating operation, the heat exchanger functions as a refrigerant condenser and heats indoor air.

(2-2) Outdoor unit The outdoor unit 2 is installed outside a building or the like, and is connected to the indoor unit 3 installed indoors via the refrigerant communication pipes 6 and 7. As shown in FIGS. 2 and 3, the outdoor unit 2 includes a substantially rectangular parallelepiped unit casing 20. As shown in FIG. 3, the outdoor unit 2 has a structure in which a blower chamber S <b> 1 and a machine chamber S <b> 2 are formed by dividing the internal space of the unit casing 20 into two by a partition plate 28 extending in the vertical direction ( So-called trunk type structure). As shown in FIG. 3, an outdoor heat exchanger 13 and an outdoor fan 16 are disposed in the blower room S1. Further, in the machine room S2, the compressor 11 and the accumulator 15 shown in FIG. 3, the four-way switching valve 12, the expansion valve 14, the liquid refrigerant side closing valve 17 and the gas which are not shown in FIG. A refrigerant side closing valve 18 and the like are arranged.

  The unit casing 20 includes a top plate 21, a bottom plate 22, a blower chamber side plate 23, a machine chamber side plate 24, a blower chamber side front plate 25, and a machine chamber side front plate 26. . The top plate 21 is a plate-shaped member made of a steel plate that constitutes the top surface portion of the unit casing 20. The bottom plate 22 is a plate-shaped member made of a steel plate that constitutes the bottom portion of the unit casing 20. The blower chamber side plate 23 is a plate-shaped member made of a steel plate that forms a side surface portion of the unit casing 20 near the blower chamber S1. The machine room side plate 24 is a plate-shaped member made of steel plate that constitutes a part of a side surface portion of the unit casing 20 near the machine room S2 and a back surface portion of the unit casing 20 near the machine room S2. The blower chamber side front plate 25 is a plate-like member made of steel plate that constitutes the front portion of the blower chamber S1 of the unit casing 20 and a part of the front portion of the machine chamber S2 of the unit casing 20. The blower chamber side front plate 25 and the blower chamber side plate 23 may be formed integrally by press-molding a single steel plate.

  The outdoor unit 2 is configured to suck outdoor air into the blower chamber S <b> 1 in the unit casing 20 from a part of the back surface and side surface of the unit casing 20 and blow out the sucked outdoor air from the front surface of the unit casing 20. Therefore, the outdoor air suction port 20a sucked into the blower chamber S1 in the unit casing 20 is between the rear end portion of the blower chamber side plate 23 and the end portion of the machine chamber side plate 24 on the blower chamber S1 side. The outdoor air inlet 20b is formed in the blower chamber side plate 23. Further, a blower chamber side front plate 25 is provided with an outlet 20c for blowing the outdoor air sucked into the blower chamber S1 to the outside. The front side of the air outlet 20c is covered with a fan grill 25a.

  The outdoor heat exchanger 13 is arranged in a vertical direction (vertical direction) in the blower chamber S1 which is a space covered by the blower chamber side plate 23, the blower chamber side front plate 25, the partition plate 28, and a part of the machine room side plate 24. It is placed upright. The outdoor heat exchanger 13 has an L shape in plan view and faces the suction ports 20a and 20b. The outdoor heat exchanger 13 is an aluminum heat exchanger. In order to prevent corrosion, the aluminum outdoor heat exchanger 13 includes a steel plate top plate 21, a bottom plate 22, a blower chamber side plate 23, a machine chamber side plate 24, and a partition plate by means of an aluminum bracket described later. It is attached to the unit casing 20 so as not to come into direct contact with 28 or the like. One end of the outdoor heat exchanger 13 is connected to the four-way switching valve 12, and the other end is connected to the expansion valve 14.

(2-2-1) Outdoor Heat Exchanger Next, the configuration of the outdoor heat exchanger 13 will be described in detail with reference to FIGS. 4, 5, and 6. The aluminum heat exchanger includes an aluminum heat transfer fin 32, an aluminum flat multi-hole pipe 33, and aluminum header collecting pipes 34 and 35. The outdoor heat exchanger 13 includes a heat exchanging portion 31 that exchanges heat between the outdoor air and the refrigerant. The heat exchanging portion 31 includes a large number of aluminum heat transfer fins 32 and a large number of flat aluminum plates. It consists of a hole tube 33. When the heat exchanging unit 31 functions as a condenser, a gas refrigerant flat multi-hole tube 33a for flowing a gas refrigerant or a gas-liquid two-layer refrigerant out of the many flat multi-hole tubes 33 is disposed. An upper heat exchanging portion 31a and a lower heat exchanging portion 31b to which a liquid refrigerant flat multi-hole tube 33b for flowing a gas-liquid two-layer refrigerant or liquid refrigerant out of a number of flat multi-hole tubes 33 are connected. doing.

  The flat multi-hole tube 33 functions as a heat transfer tube, and exchanges heat moving between the heat transfer fins 32 and the outdoor air between the refrigerant flowing inside and the heat transfer fins 32.

  The outdoor heat exchanger 13 includes aluminum header collecting pipes 34 and 35, one on each end of the heat exchanging section 31. The header collecting pipe 34 has an aluminum cylindrical pipe structure, and has internal spaces 34a and 34b partitioned from each other by an aluminum baffle 34c. An aluminum heat exchanger side gas pipe 38 is connected to the upper internal space 34a, and an aluminum heat exchanger side liquid pipe 39 is connected to the lower internal space 34b.

  The header collecting pipe 35 has an aluminum cylindrical pipe structure, and is partitioned by aluminum baffles 35f, 35g, 35h, and 35i to form internal spaces 35a, 35b, 35c, 35d, and 35e. A number of flat multi-hole pipes 33a for gas refrigerant connected to the internal space 34a above the header collecting pipe 34 are connected to the three internal spaces 35a, 35b, 35c of the header collecting pipe 35. A number of flat multi-hole pipes 33 b for liquid refrigerant connected to the internal space 34 b below the header collecting pipe 34 are connected to the three internal spaces 35 c, 35 d, and 35 e of the header collecting pipe 35.

  Further, the internal space 35a and the internal space 35e of the header collecting pipe 35 are connected by an aluminum connecting pipe 36, and the internal space 35b and the internal space 35d are connected by an aluminum connecting pipe 37. The internal space 35c also has a function of connecting a part of the upper internal space (part connected to the internal space 34a) and a part of the lower internal space (part connected to the internal space 34b) of the heat exchange unit 31. Plays. With these configurations, for example, during cooling operation (when functioning as a condenser), the gas refrigerant supplied to the internal space 35a above the header collecting pipe 35 by the heat exchanger-side gas pipe 38 made of aluminum is heat exchanged. Heat exchange is performed at the upper part of the part 31, and a part is liquefied to form a gas-liquid two-layer state, folded back at the header collecting pipe 35, and the remaining gas refrigerant is liquefied through the lower part of the heat exchange part 31 to form aluminum. It goes out from the heat exchanger side liquid pipe 39 made of the product.

  FIG. 6 is a partially enlarged view showing a cross-sectional structure when cut along a plane perpendicular to the longitudinal direction of the flat multi-hole tube 33 of the heat exchange section 31 of the outdoor heat exchanger 13. The heat transfer fins 32 are thin aluminum flat plates, and each heat transfer fin 32 has a plurality of cutouts 32a extending in the horizontal direction. The flat multi-hole tube 33 has upper and lower flat portions serving as heat transfer surfaces and a plurality of internal flow paths 331 through which the refrigerant flows. The flat multi-hole tubes 33 that are slightly thicker than the upper and lower widths of the notches 32a are spaced apart in a state in which the flat surface portion is directed up and down (arranged so that the side surfaces of the flat multi-hole tubes 33 face each other). Are arranged in a plurality of stages and temporarily fixed in a state of being fitted into the notches 32a. Thus, the heat transfer fin 32 and the flat multi-hole tube 33 are brazed in a state where the flat multi-hole tube 33 is fitted in the notch 32 a of the heat transfer fin 32. Further, both ends of each flat multi-hole pipe 33 are fitted into the header collecting pipes 34 and 35 and brazed.

  The internal spaces 34a and 34b of the header collecting pipe 34 and the internal spaces 35a, 35b, 35c, 35d and 35e of the header collecting pipe 35 and the internal flow path 331 of the flat multi-hole pipe 33 are connected. The internal spaces 34a, 34b of the header collecting pipe 34 and the internal spaces 35a, 35b, 35c, 35d, 35e of the header collecting pipe 35 are provided with a rectifying plate for adjusting the flow of the refrigerant. The detailed description is omitted.

(2-2-2) Blower Room Side Plate FIG. 7 is an enlarged side view of the fan chamber side plate 23. Screw holes 23a and 23b are formed on the front side of the suction port 20b of the blower chamber side plate 23 made of steel plate. Aluminum brackets 40 and 50 are fixed by, for example, male male screws 80 (see FIG. 16) screwed into these screw holes 23a and 23b, and an aluminum header assembly brazed to the aluminum brackets 40 and 50 The tube 35 is fixed.

(2-2-3) Aluminum Bracket FIG. 8 shows an aluminum bracket 40 for attaching the outdoor heat exchanger 13 to the blower chamber side plate 23. FIG. 8A is a perspective view of the bracket 40 made of aluminum, FIG. 8B is a plan view of the bracket 40, FIG. 8C is a front view of the bracket 40, and FIG. FIG. 4 is a side view of the bracket 40.

  The bracket 40 is formed, for example, by pressing a single aluminum plate. Two clamping pieces 42 attached to the header collecting pipe 35 of the outdoor heat exchanger 13 extend from the main body 41 of the bracket 40. The sandwiching piece 42 is formed in an arc shape along the outer periphery of the cylindrical header collecting pipe 35. Two mounting pieces 43 extend on the side of the bracket 40 opposite to the clamping piece 42. The attachment piece 43 is provided with a through hole 43a for allowing a screw to pass when attaching to the blower chamber side plate 23 or the like. The through hole 43a is an oblong hole of m1 × n1. In order to position the bracket 40 and the resin cover 60, the fitting portion 43 is provided with a fitted portion 43 b formed by cutting out a part of the upper side end portion. The main body portion 41 is provided with a sensor holding portion 44 formed in a concave shape. It can be seen that the shape of the sensor holding portion 44 is formed with a cylindrical hole 44a and a slit 44b. The slit 44b formed on the side facing the header collecting pipe 35 is for bringing the temperature sensor held by the sensor holding portion 44 into contact with the header collecting pipe 35.

  A state in which the bracket 40 made of aluminum is brazed to the header collecting pipe 35 is shown in FIG. Brazing of the bracket 40 to the header collecting pipe 35 is performed, for example, by previously forming a brazing material on the surface of the header collecting pipe 35 and temporarily fixing the bracket 40 to the aluminum heat transfer fin 32 or aluminum. The flat multi-hole tube 33 is assembled in a furnace as shown in FIG. 5 and FIG.

  The bracket 40 is attached around the inner space 35a shown in FIG. The inner dimension of the cylindrical hole formed by the sensor holding portion 44 of the bracket 40 and the header collecting pipe 35 is formed slightly smaller than the outer dimension of the case 54 of the temperature sensor 19 (see FIG. 9). The temperature sensor 19 is firmly pushed into the case 54 and fixed in the cylindrical hole.

  FIG. 10 shows an aluminum bracket 50, FIG. 10 (a) shows a perspective view thereof, FIG. 10 (b) shows a plan view thereof, and FIG. 10 (c) shows a plan view thereof. A front view thereof is shown, and a side view thereof is shown in FIG. Similarly to the bracket 40, the bracket 50 is formed, for example, by pressing a single aluminum plate. Although the shape of the bracket 50 is different from that of the bracket 40, the bracket 50 has the same configuration as the bracket 40, that is, a main body 51, a sandwiching piece 52, and an attachment piece 53. Further, although the opening position is different from the through hole 43 a of the mounting piece 43, the through hole 53 a is also formed in the mounting piece 53. These through holes 53a are also m1 × n1 oval holes. In order to position the bracket 40 and the resin cover 60, the attachment piece 53 is provided with a fitted portion 53 b formed by cutting out a part of the end portion. Since the temperature sensor 19 is not attached to the bracket 50, the structure like the sensor holding portion 44 is not formed in the bracket 50.

(2-2-4) Resin cover Since the brackets 40 and 50 are made of aluminum, when the bracket 40 is brought into direct contact with the blower chamber side plate 23 made of a steel plate, the contact between iron and aluminum, which is a metal having a different ionization tendency, occurs. As a result, the corrosion of the brackets 40 and 50 is promoted. Therefore, the resin cover 60 shown in FIGS. 11, 12, and 13 is attached to the brackets 40 and 50, and the bracket is provided with the resin cover 60 interposed between the blower chamber side plate 23 and the brackets 40 and 50. 40 and 50 are attached. 11A is a plan view of the resin cover, FIG. 11B is a front view of the resin cover, and FIG. 11C is a bottom view of the resin cover. 12A is a left side view of the resin cover, FIG. 12B is a rear view of the resin cover, and FIG. 12C is a right side view of the resin cover. 13 (a) is a cross-sectional view taken along the line II in FIG. 12 (b), FIG. 13 (b) is a cross-sectional view taken along the line II-II in FIG. 12 (b), and FIG. It is the III-III arrow partial expanded sectional view in FIG.12 (c).

  Although the shapes of the brackets 40 and 50 are different, the resin cover 60 is also used for the two brackets 40 and 50. Therefore, although the shape of the resin cover 60 is complicated, the resin cover 60 is formed by one injection molding, for example. The body portion 61 of the resin cover 60 has an insertion portion 62 and an insertion portion 63 for attaching the attachment pieces 43 and 53 of the brackets 40 and 50. The attachment pieces 43 and 53 having the same shape among the attachment pieces 43 and 53 each having two brackets 40 and 50 are inserted into the insertion portion 62. The recess 65 in front of the main body 61 has a shape that follows the shape of the main body 41 of the bracket 40, and is processed into such a shape in order to attach the temperature sensor 19.

  In order to position the bracket 40 and the resin cover 60, the insertion portions 62 and 63 are provided with fitting protrusions 62c and 63c protruding from a part of the top surface. When the fitting protrusions 62c and 63c are fitted into the fitted portions 43b and 53b of the mounting pieces 43 and 53 of the brackets 40 and 50, the positional relationship between the brackets 40 and 50 and the resin cover 60 is determined. On the other hand, the attachment pieces 43 and 53 having different shapes from each other in the brackets 40 and 50 are inserted into the insertion portion 63 surrounded by the upper surface, the rear surface, and the left and right side surfaces. The insertion part 63 can deal with the mounting pieces 43 and 53 having different shapes on the outside by opening two portions of the front surface and the bottom surface. The left and right side surfaces of the attachment pieces 43 and 53 inserted into the insertion portion 62 and the insertion portion 63 are covered with the resin cover 60. Therefore, the resin cover 60 is interposed between the blower chamber side plate 23 and the mounting pieces 43 and 53 located on the side surface side of the resin cover 60, and the aluminum brackets 40 and 50 are attached to the blower chamber side plate 23. The brackets 40 and 50 can be fixed to the blower chamber side plate 23 without being touched directly.

  The left and right side surfaces of the insertion portion 62 are formed by the inner wall 62a and the outer wall 62b. Openings 62aa and 62ba are formed in the outer wall 62b at positions corresponding to the through holes 43a and 53a of the mounting pieces 43 and 53, respectively. The shape of the overlapping portion of the opening 62aa and the opening 62ba in a side view is substantially the same shape as an m1 × n1 oblong hole having the same size as the through holes 43a and 53a, and a part thereof is notched. Shape.

  The inner wall 63a and the outer wall 63b form the left and right side surfaces of the insertion portion 63. Since the positions of the through holes 43a and 53a of the mounting pieces 43 and 53 having different shapes are different, two openings 63ba and 63bb are formed in the outer wall 63b. Also on the inner wall 63a, openings 63aa and 63ab larger than the openings 63ba and 63bb are formed at positions corresponding to the openings 63ba and 63bb. Through the openings 62ba, the openings 62aa, the openings 63ba and 63bb, and the openings 63aa and 63ab, the inner walls 62a and 63a to the outer walls 62b and 63b penetrate. The shape of the overlapping portion of the opening 63aa and the opening 63ba in a side view is substantially the same shape as the m1 × n1 oblong hole having the same size as the through holes 43a and 53a, and a part thereof is notched. Shape. Further, the shape of the overlapping portion of the opening 63ab and the opening 63bb in a side view is the same shape as an m1 × n1 oval hole having the same size as the through holes 43a and 53a.

  12B, an insertion portion 64 having an opening on the back side is formed on the outer wall 62b. A side plate portion 72 of a mounting plate 70 described later is inserted into the insertion portion 64. Since the insertion portion 64 is formed inside the outer wall 62b, a resin partition is formed between the aluminum brackets 40, 50 inserted into the insertion portion 62 and the iron mounting plate 70 inserted into the insertion portion 64. 63bc exists.

(2-2-5) Mounting plate The mounting plate 70 is fitted into the resin cover 60 in order to fasten the brackets 40 and 50 and the resin cover 60 to the blower chamber side plate 23 with male screws. 14 and 15 show a mounting plate 70, FIG. 14 (a) shows a plan view thereof, FIG. 14 (b) shows a front view thereof, and FIG. 15 (a) shows a front view thereof. The left side view is shown, and FIG. 15 (b) shows the right side view.

  The mounting plate 70 is formed with side plate portions 72 and 73 extending vertically from the left and right edges of a horizontal flat base 71. The base 71 has a substantially rectangular shape with a recess 71c in the front. The width of the base 71 is substantially equal to the interval between the inner walls 62a and 63a of the resin cover 60. Therefore, when the mounting plate 70 is fitted into the resin cover 60 in a state in which the distal end portion 71a of the base portion 71 is in contact with the front stopper 61a of the main body portion 61 of the resin cover 60, the side plate portion 72 of the mounting plate 70 becomes resin. The side plate 73 is inserted into the insertion portion 63 of the cover 60 and is in contact with the inner wall 63a of the resin cover 60. The contact portion 73 c of the side plate 73 contacts the periphery of the back side of the insertion portion 64, and the front end portion 71 a of the base portion 71 contacts the front stopper 61 a, so that the mounting plate 70 is forward of the resin cover 60. It is in a state that does not shift. Thus, the mounting plate 70 is in a state where the mounting plate 70 is not displaced forward. The rear end portion 71 b of the base portion 71 abuts on the rear stopper 61 b of the main body portion 61 of the resin cover 60 and does not move to the rear of the resin cover 60.

  Screw holes 72a and 73a formed in the side plates 72 and 73 have openings 62aa on the inner wall 62a of the resin cover 60, openings 63aa and 63ab on the inner wall 63a, openings 62ba on the outer wall 62b, and openings on the outer wall 63b in side view. It overlaps with the parts 63ba and 63bb. In addition, the external dimensions of a male screw described later that is screwed into the screw holes 72a, 73a, 73b are as follows. It is smaller than the inner size of the part. Further, the outer dimension of the male screw is smaller than the inner dimension of the through holes 43a and 53a of the brackets 40 and 50 made of aluminum. Therefore, in a state where the mounting plate 70 is correctly attached to the resin cover 60, the male screw can be fastened to the screw holes 72a, 73a, 73b of the mounting plate 70 so as not to contact the brackets 40, 50 and the resin cover 60. it can. These screw holes 72a, 73a, 73b are formed by burring.

  When the attachment plate 70 is attached to the resin cover 60, the upward movement of the attachment plate 70 is suppressed by the top portion of the side plate portion 72 coming into contact with the top surface of the insertion portion 64.

(2-2-6) Assembly of Bracket, Resin Cover, and Mounting Plate FIG. 16 shows an aluminum bracket 40, a resin cover 60, and an iron mounting plate 70. The assembled state fastened to 23 is shown. FIG. 17 shows a state in which the aluminum bracket 40, the resin cover 60, and the iron mounting plate 70 are assembled with the blower chamber side plate 23 removed. As shown in FIG. 17, one of the attachment pieces 43 of the bracket 40 is attached to the windproof plate 100.

  An iron mounting plate 70 is disposed inside the resin cover 60 in a state separated from the bracket 40 by the resin cover 60. A male screw 80 that passes through the through hole 43a of the bracket 40, the opening 63aa of the resin cover 60, and the like is fitted into the screw hole 73b of the mounting plate 70.

  As shown in FIG. 18, the header collecting pipe 34 of the outdoor heat exchanger 13 is connected to the machine room side plate 24 and the partition plate 28 by an aluminum bracket 90, a resin cover 92, and an iron mounting plate 93. Fixed. Since the aluminum bracket 90, the resin cover 92, and the iron mounting plate 93 have structures similar to those of the brackets 40, 50, the resin cover 60, and the mounting plate 70, description thereof is omitted. The bracket 90 also has two attachment pieces, like the brackets 40 and 50, but these two attachment pieces are fixed to the machine room side plate 24 and the partition plate 28, respectively. Since the mounting locations are different, the structure of the aluminum bracket 90, the resin cover 92, and the iron mounting plate 93 may be changed from that of the brackets 40, 50, the resin cover 60, and the mounting plate 70 described above.

(3) Features of outdoor unit (3-1)
In the outdoor unit 2 described above, the clamping pieces 42 and 52 (fixed portions) of the aluminum brackets 40, 50, and 90 are directly attached to the aluminum outdoor heat exchanger 13, and the mounting pieces 43 and 53 (fixed portions) are provided. It is fixed to the blower chamber side plate 23, the machine chamber side plate 24 and the partition plate 28 (non-aluminum metal structural parts) made of steel plate via the resin covers 60 and 92, and the aluminum and the steel plate do not contact each other. The brackets 40 and 50 made of aluminum are fastened in cooperation with an iron (non-aluminum metal) male screw 80 (locking part) and an iron mounting plate 70 (locked structure), and a blower made of steel plate. It is fixed to the room side plate 23. The aluminum bracket 90 is also fastened in cooperation with an iron male screw (not shown) and an iron mounting plate 93 (locked structure), and is made of steel plate (machine room side plate 24 or partition plate). 28 is fixed.

  However, the outer diameter d (outer shape) of the male screw 80 (locking component) is smaller than the dimension (outer shape of the hole) of the through holes 43a and 53a of the brackets 40 and 50. That is, there is a relationship of outer diameter d <hole diameters m1 and n1. The aluminum brackets 40, 50, 90 are fastened to the blower room side plate 23, the machine room side plate 24, and the partition plate 28 (structural parts) via resin covers 60, 92 (non-metallic members), The brackets 40, 50, and 90 made of aluminum are in a non-contact state that does not contact the male (non-aluminum metal) male screw 80 that passes through the through holes 43a and 53a of the mounting pieces 43 and 53 (fixed portion). It is maintained by the resin covers 60 and 92 (non-metallic members). The through holes 43a and 53a of the fixed part may be holes having a notch that reaches part of the fixed part (mounting pieces 43 and 53).

  Thus, since the male male screw 80 does not contact the aluminum brackets 40, 50, 90, the corrosion of the bracket caused by the corrosion between iron (non-aluminum metal) and the aluminum metal is prevented. It is. Corrosion in the vicinity of the attachment pieces 43, 53 of the aluminum brackets 40, 50, 90 for attaching the aluminum outdoor heat exchanger 13 can be prevented, and the outdoor heat exchanger 13 is caused by such corrosion. It is possible to prevent inconveniences such as loosening of the attachment.

  Of course, the resin covers 60, 92 are interposed between the mounting pieces 43, 53 of the brackets 40, 50, 90 and the blower room side plate 23, the machine room side plate 24, and the partition plate 28 so that they are not in contact with each other. I keep it. Therefore, since the blower chamber side plate 23, the machine chamber side plate 24 and the partition plate 28 (structural components) made of a steel plate (made of non-aluminum metal) do not contact the aluminum brackets 40, 50 and 90, they are not In this case, corrosion of the bracket caused by corrosion between steel (non-aluminum metal) and aluminum metal is prevented.

  In the above embodiment, the resin member such as the resin covers 60 and 92 is described as an example of the non-metal member. However, the non-metal member may be a member made of a polymer material such as a rubber member or a ceramic member. It may be a member made of a non-metallic inorganic material. Of course, the non-metallic member here is a member made of a material that does not promote corrosion between aluminum and an aluminum alloy rather than a non-aluminum metal.

  The blower chamber side plate 23 and the machine chamber side plate 24 (structural parts) made of steel plates (made of non-aluminum metal) are unit casings 20 made of steel plates (non-aluminum metal housings). The unit casing 20 can be fixed with aluminum brackets 40, 50, 90 via the resin cover 60, and the outdoor unit 2 can be easily made compact.

(3-2)
The resin cover 60 has inner walls 62a and 63b and outer walls 62b and 63b (sandwich structure) of insertion parts 62 and 63 for sandwiching the mounting pieces 43 and 53 (fixed parts) of the brackets 40 and 50 made of aluminum from both sides. . The male screw 80 (locking component) and the mounting plate 70 (locked structure) fasten the insertion portions 62 and 63 of the resin cover 60 and the mounting pieces 43 and 53 of the aluminum brackets 40 and 50. Yes. Since the mounting pieces 43 and 53 of the brackets 40 and 50 are fastened while being sandwiched between the inner walls 62a and 63b and the outer walls 62b and 63b of the resin cover 60, the aluminum brackets 40 and 50 are firmly fixed by the resin cover 60. be able to. As a result, the aluminum outdoor heat exchanger 13 can be firmly fixed, and the effect of preventing problems such as loose attachment of the outdoor heat exchanger 13 can be improved.

  The bracket 90 made of aluminum has two mounting pieces like the mounting pieces 43 and 53 of the brackets 40 and 50 made of aluminum. Since it can be fixed at two locations of the machine room side plate 24 and the partition plate 28 using two mounting pieces, the stability of fixing the outdoor heat exchanger 13 can be improved, and rattling of the outdoor heat exchanger 13 can be improved. It is possible to prevent problems such as the generation of noise due to noise.

(3-3)
As described above, by fastening with the male male screw 80 and the mounting plate 70 having the screw holes 72a, 73a, 73b, the mounting plate 70 and the resin cover 60 can be easily positioned and handled easily. And since the latching components with required intensity | strength are obtained at low cost by using the iron male screw 80, the outdoor unit 2 can be provided at low cost. Since the screw holes 72a, 73a, 73b are subjected to burring processing, the male screw 80 can be stopped only by the mounting plate 70, so the number of parts is reduced and the manufacturing cost of the outdoor unit 2 is reduced. be able to.

(4) Modification (4-1) Modification A
In the above embodiment, the case where an aluminum member is used for the outdoor heat exchanger 13 or the like has been described. However, the aluminum member can be replaced with an aluminum alloy member, for example, an aluminum outdoor heat exchanger. Instead of 13, an aluminum alloy outdoor heat exchanger can be used, and instead of the aluminum brackets 40, 50, 90, aluminum alloy brackets can be used.

(4-2) Modification B
Although the case where iron, steel, etc. were used as a non-aluminum metal was demonstrated in the said embodiment, you may use other metals, such as copper and a copper alloy.

(4-3) Modification C
In the above embodiment, a resin molded body is used for the resin cover 60, but it may be formed of other materials such as a composite member such as ceramic or prepreg.

(4-4) Modification D
In the above embodiment, the case where the mounting plate 70 is used for the locked structure of the male screw 80 has been described. However, the locked structure can lock an iron nut or the male screw 80 that can lock the male screw 80. A resin female screw part molded on the resin cover 60 may be used, and a locking member other than a screw or a locked structure may be used.

(4-5) Modification E
In the above-described embodiment, the case where the male screw 80 is attached to the attachment plate 70 (locked structure) has been described. However, instead of the screw holes 72a, 73a, 73b of the attachment plate 70, the blower chamber side plate 23 and the machine chamber side plate. 24 and the partition plate 28 are formed with screw holes, and the male screws 80 are screwed into the screw holes of the blower chamber side plate 23, the machine chamber side plate 24 and the partition plate 28, and aluminum brackets 40, 50, 90 and a resin cover are formed. 60 and 92 may be fixed. In this case, the screw holes of the blower chamber side plate 23, the machine chamber side plate 24, and the partition plate 28 become a locked structure.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 Outdoor unit 3 Indoor unit 13 Outdoor heat exchanger 20 Unit casing 34, 35 Header collecting pipe 40, 50, 90 Bracket 60, 92 Resin cover 70, 93 Mounting plate

JP-A-7-234088

Claims (6)

Aluminum or aluminum alloy heat exchanger (13), fixing part (42, 52) directly attached to the heat exchanger and non-aluminum metal structural parts (23, 24, 28) for penetration Aluminum or aluminum alloy brackets (40, 50, 90) having fixing portions (43, 53) having holes (43a, 53a), and the fixing portions and the structural parts of the brackets fixed to each other An outdoor unit (2) of a refrigeration apparatus comprising a non-metallic member (60, 92) interposed between and non-contacting state,
A locking part (80) made of non-aluminum metal having an outer shape smaller than the through hole of the fixing part;
A locked structure (70, 93) for fastening the fixing portion of the bracket to the structural component via the non-metallic member in cooperation with the locking component;
Further comprising
The non-metallic member has a non-contact state between the bracket made of aluminum or aluminum alloy and the locking part made of non-aluminum metal in a state where the locking part penetrates the through hole of the fixing portion. Maintain,
Outdoor unit of refrigeration equipment. A housing (20) made of a non-aluminum metal for housing the heat exchanger made of aluminum or aluminum alloy;
The housing made of non-aluminum metal is the structural component made of non-aluminum metal.
The outdoor unit of the refrigeration apparatus according to claim 1. The non-metallic member has a sandwiching structure (62a, 62b, 63a, 63b) that sandwiches the fixing portion of the bracket from both sides,
The locking component and the locked structure fasten the sandwiching structure of the non-metallic member and the fixing portion of the bracket made of aluminum or aluminum alloy,
The outdoor unit of the refrigeration apparatus according to claim 2. The locking part is a male screw (80) made of non-aluminum metal,
The locked structure is separate from the structural component, and includes a mounting plate (70, 93) having a nut capable of locking the male screw, a screw hole capable of locking the male screw, or the male screw. It is a female screw portion of the non-metallic member that can lock the screw,
The outdoor unit of the refrigeration apparatus according to claim 3. The mounting plate is subjected to burring in the screw hole,
The outdoor unit of the refrigeration apparatus according to claim 4. The bracket (90) has a plurality of the fixing portions,
The outdoor unit of the freezing apparatus as described in any one of Claim 1 to 5.

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