KR101441283B1 - Outdoor unit for refrigeration apparatus - Google Patents

Abstract

Prevents corrosion of aluminum bracket for mounting aluminum heat exchanger. The bracket 40 made of aluminum is fastened together with the male screw 80 made of iron and the mounting plate 70 made of iron and fixed to the side plate 23 of the steel plate. The outer diameter of the male screw 80 is smaller than the dimension of the through hole 43a of the bracket 40. [ The bracket 40 made of aluminum is fastened to the blower chamber side plate 23 via the resin cover 60 and the bracket 40 made of aluminum passes through the through hole 43a of the mounting piece 43 Contact state that does not come into contact with the male screw 80 made of iron or the like is held by the resin cover 60.

Description

OUTDOOR UNIT FOR REFRIGERATION APPARATUS < RTI ID = 0.0 >

The present invention relates to an outdoor unit of a refrigeration system, particularly an outdoor unit of a refrigeration system having a heat exchanger made of aluminum or aluminum alloy.

In recent years, in order to lighten the heat exchanger, aluminum or an aluminum alloy may be used not only for the fin of the heat exchanger but also for the heat transfer tube and header collecting tube of the heat exchanger. On the other hand, a heat exchanger made of aluminum or an aluminum alloy is accommodated in a casing such as an outdoor unit, and a non-aluminum metal other than aluminum or an aluminum alloy such as a steel sheet, for example, It is common to be used.

Such direct contact of the non-aluminum metal to the heat exchanger made of aluminum or aluminum alloy causes corrosion of the heat exchanger. For example, as described in Patent Document 1 (Japanese Unexamined Patent Publication (Kokai) No. 7-234088), conventionally, a bracket made of aluminum or aluminum alloy is fixed to a header collecting pipe of a heat exchanger made of aluminum or aluminum alloy And a heat exchanger is mounted on a non-aluminum metal such as a vehicle body of an automobile through a bracket made of aluminum or an aluminum alloy.

Japanese Patent Application Laid-Open No. 7-234088

However, in such a configuration, a portion of the bracket made of aluminum or aluminum alloy and the non-aluminum metal come into 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 loosening of mounting of the heat exchanger.

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

An outdoor unit of a refrigeration system according to a first aspect of the present invention comprises a heat exchanger made of aluminum or an aluminum alloy, a fixing part directly mounted on the heat exchanger, and a fixing part having a through hole for fixing to a structural part made of non- And a nonmetallic member interposed between the fixed part of the bracket fixed to each other and the structural part so as to bring them into a noncontact state, the outdoor unit comprising: a through hole Wherein the non-metallic member further comprises an engaging part made of a non-aluminum metal having a smaller outer shape and a engaged structure for engaging the fixed part of the bracket with the engaging part via a non-metallic member, In a state in which the fitting part is passed through the through hole of the aluminum It maintains the bracket and the non-contact state of the engagement part of the non-aluminum metallic contraband.

The non-metallic member referred to herein includes a member made of a polymer material such as a resin member and a rubber member, and a member made of a non-metallic inorganic material such as a ceramic member.

In the outdoor unit of the refrigeration apparatus according to the first aspect, in a state in which the bracket made of aluminum or aluminum alloy is fixed to the structural component made of non-aluminum metal through the nonmetal member, the non- It is possible to keep the engagement parts smaller than the outer shape of the aluminum alloy or aluminum alloy in a noncontact state. Since the non-aluminum metal engagement part does not contact the bracket made of aluminum or aluminum alloy, corrosion of the bracket due to corrosion occurring between non-aluminum metal and aluminum metal is prevented.

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

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

An out-room unit of a refrigeration system according to a third aspect of the present invention is the out-room unit of a refrigeration system according to the second aspect, wherein the non-metallic member is an insertion structure for inserting a fixed portion of a bracket made of aluminum or aluminum alloy from both sides And the engaging part and the engaged structure are engaged with the fixing part of the bracket of the aluminum or aluminum alloy and the insertion structure of the nonmetal member.

In the outdoor unit of the refrigeration system according to the third aspect, since the fixing portion of the bracket is engaged with the insertion structure of the nonmetal member, the bracket can be firmly fixed by the nonmetal member, and the fixing of the heat exchanger can be strengthened .

In an outdoor unit of a refrigeration system according to a fourth aspect of the present invention, in the outdoor unit of the refrigeration apparatus of the third aspect, the engaging part is a male non-aluminum metal thread, A nut that can be fitted with a male screw, a mounting plate having a screw hole to which a male screw can be fitted, or a female screw part of a non-metallic member capable of fitting a male screw.

In the outdoor unit of the refrigeration system according to the fourth aspect, by using the non-aluminum metal-made male screw, the engaging part having the required strength is obtained at low cost.

According to a fifth aspect of the present invention, in the outdoor unit of the refrigeration system according to the fourth aspect, in the outdoor unit of the refrigeration apparatus, the mounting plate is subjected to burring to the screw hole.

In the outdoor unit of the refrigeration system according to the fifth aspect, since the threaded hole is burring-processed, the screwing can be stopped only by the mounting plate, and the number of parts can be reduced.

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

In the outdoor unit of the refrigeration apparatus according to the sixth aspect, since the brackets are fixed at a plurality of locations using a plurality of fixed portions, the stability of fixation of the heat exchanger can be improved.

In the outdoor unit of the refrigeration system according to the first aspect, it is possible to prevent the corrosion of the bracket made of aluminum or aluminum alloy for mounting the heat exchanger made of aluminum or aluminum alloy, It is possible to prevent the problems such as loosening due to the mounting of the heat exchanger.

In the outdoor unit of the refrigeration apparatus according to the second aspect, it becomes easy to make the outdoor unit compact.

In the outdoor unit of the refrigeration apparatus according to the third aspect, the fixing of the heat exchanger can be strengthened by the insertion structure of the non-metallic member, and the effect of preventing the occurrence of problems such as loosening of the mounting of the heat exchanger can be improved.

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

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

In the outdoor unit of the refrigeration system according to the sixth aspect, since the fixation of the heat exchanger is stabilized, problems such as generation of noise due to shaking of the heat exchanger can be prevented.

1 is a circuit diagram for explaining an outline of a configuration of an air conditioner according to an embodiment;
2 is a perspective view showing the appearance of an outdoor unit;
3 is a schematic plan view showing an outdoor unit with a top plate removed.
4 is a schematic rear view showing a schematic structure of an outdoor heat exchanger.
5 is a partial cross-sectional view for explaining a configuration of an outdoor heat exchanger.
6 is an enlarged cross-sectional view for explaining a configuration of a heat exchanger of an outdoor heat exchanger.
7 is an enlarged side view of the blower chamber side plate.
FIG. 8A is a perspective view showing one embodiment of a bracket made of aluminum, FIG. 8B is a plan view of the bracket, FIG. 8C is a front view of the bracket, and FIG.
9 is a partially enlarged perspective view showing a bracket brazed to a header collection tube;
Fig. 10A is a perspective view showing another embodiment of the bracket made of aluminum, Fig. 10B is a plan view of the bracket, Fig. 10C is a front view of the bracket, and Fig. 10D is a side view of the bracket.
11 (a) is a plan view of the resin cover, (b) is a front view of the resin cover, and (c) is a bottom view of the resin cover.
FIG. 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.
Fig. 13A is a cross-sectional view taken along the line I-I in Fig. 12B, Fig. 12B is a cross-sectional view taken along the line II-II in Fig. 12B, 12 (c). Fig.
14 (a) is a plan view of the mounting plate, and Fig. 14 (b) is a front view of the mounting plate.
FIG. 15A is a left side view of the mounting plate, and FIG. 15B is a right side view of the mounting plate.
16 is an exploded view of the bracket, the resin cover and the mounting plate.
17 is a perspective view showing a state in which a bracket, a resin cover, and a mounting plate are mounted.
18 is a perspective view showing an outdoor unit state in which a unit casing other than the bottom plate is removed.

(1) Overall configuration of air conditioner

As a refrigerating device according to an embodiment of the present invention, a refrigerating device used in an air conditioner will be described. 1 is a circuit diagram showing an outline of an air conditioner. The air conditioner (1) is composed of an outdoor unit (2) and an indoor unit (3). This air conditioner (1) is a device used for cooling and heating each room in a building by performing a vapor compression refrigeration cycle operation. The air conditioner 1 includes an outdoor unit 2 serving as a heat source unit, an indoor unit 3 serving as a utilization unit and refrigerant communication tubes 6 and 7 for connecting the outdoor unit 2 and the indoor unit 3 to each other Respectively.

A refrigerating device comprising a compressor (11), a direction switching valve (12), an outdoor unit (3), and an outdoor unit (2) A heat exchanger 13, an expansion valve 14, an indoor heat exchanger 4, an accumulator 15, etc. are connected by a refrigerant pipe. A refrigerating cycle operation is performed in which the refrigerant is sealed in the refrigerating device, the refrigerant is compressed, cooled, decompressed, heated and evaporated, and then compressed again. 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.

1, that is, the discharge side of the compressor 11 is connected to the gas side of the outdoor heat exchanger 13, and the discharge side of the compressor 11 is connected to the discharge side of the compressor 11, The suction side is connected to the gas side of the indoor heat exchanger 4 via the accumulator 15, the gas refrigerant-side closing valve 18, and the refrigerant communication pipe 7. The outdoor heat exchanger 13 is used as a condenser for the refrigerant compressed in the compressor 11 and the indoor heat exchanger 4 is disposed in the outdoor heat exchanger 13 for condensation And functions as an evaporator of the refrigerant.

1, that is, the discharge side of the compressor 11 is connected to the indoor heat exchanger 12 via the gas refrigerant-side closing valve 18 and the refrigerant communication pipe 7 at the time of heating operation. 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 controls the indoor heat exchanger 4 as the condenser of the refrigerant compressed in the compressor 11 and the outdoor heat exchanger 13 as the condenser in the indoor heat exchanger 4, And functions as an evaporator of the refrigerant.

(2) Detailed configuration of air conditioner

(2-1) Indoor unit

The indoor unit (3) is installed on a wall surface of a room by a wall hanging or the like, or by embedding it on the ceiling of a room such as a building or by hanging a sound. 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 pin type pin-and-tube type heat exchanger constituted by, for example, a heat transfer pipe and a plurality of fins, functions as an evaporator of a refrigerant during cooling operation to cool room air, Is a heat exchanger that functions as a refrigerant condenser and heats room air.

(2-2) Outdoor unit

The outdoor unit 2 is installed outside the building or the like and is connected to the indoor unit 3 installed in the room via the refrigerant communication pipes 6 and 7. As shown in Figs. 2 and 3, the outdoor unit 2 is provided with a unit casing 20 having a substantially rectangular parallelepiped shape. 3, the out-room unit 2 is divided into two by a partition plate 28 in which the inner space of the unit casing 20 extends in the vertical direction, so that the ventilator room S1 and the machine room S2 are separated from each other, (So-called trunk-like structure). As shown in Fig. 3, an outdoor heat exchanger 13, an outdoor fan 16, and the like are disposed in the blower chamber S1. 3 and the directional valve 12 and the expansion valve 14, which are not shown in Fig. 3, and the liquid refrigerant-side closed valve 14, which are not shown in Fig. 3, A valve 17, a gas refrigerant-side closing valve 18, and the like are disposed.

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

The outdoor unit 2 sucks outdoor air from the back surface and a part of the side surface of the unit casing 20 to the blower room S1 in the unit casing 20 and removes the sucked outdoor air from the front surface of the unit casing 20 Out. The suction port 20a of the outdoor air sucked into the blower chamber S1 in the unit casing 20 is connected to the rear end side of the blower chamber side plate 23 and the blower chamber S1 of the machine chamber side plate 24, And a suction port 20b for the outdoor air is formed in the blower chamber side lateral plate 23. [ Further, a blow-out port 20c for blowing outdoor air sucked by the blower chamber S1 to the outside is provided on the blower-room-side front plate 25. The front side of the air outlet 20c is covered with a fan grille 25a.

The outdoor heat exchanger 13 is connected to a blower chamber S1 which is a space covered with a part of the blower chamber side plate 23, the blower chamber side front plate 25, the partition plate 28 and the machine room side plate 24, Direction). The outdoor heat exchanger 13 has an L-shape in plan view, and faces the intake ports 20a and 20b. The outdoor heat exchanger (13) is a heat exchanger made of aluminum. In order to prevent corrosion, the aluminum outdoor heat exchanger 13 is made of a steel plate such as a top plate 21, a bottom plate 22, a blower chamber side plate 23, And is not mounted on the unit casing 20 so as not to come into direct contact with the partition plate 24 and the partition plate 28. [ One end of the outdoor heat exchanger (13) is connected to the direction switching valve (12), and the other end thereof 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. Fig. The heat exchanger made of aluminum is made up of a heat transfer fin 32 made of aluminum, a flat pore 33 made of aluminum, and header set tubes 34 and 35 made of aluminum. The outdoor heat exchanger 13 is provided with a heat exchanging portion 31 for exchanging heat between the outdoor air and the refrigerant. The heat exchanging portion 31 includes a plurality of aluminum heat transfer fins 32, And a flat porous pipe 33. The heat exchanging part (31) is provided with an upper heat exchanging part (33a) in which a flat refrigerant pouring pipe (33a) for flowing a gas refrigerant or a gas refrigerant abnormal refrigerant out of the plurality of flat polycore tubes (33) And a lower heat exchange portion 31b to which a flat pore 33b for liquid refrigerant for flowing a coolant or a liquid refrigerant in a gas-liquid abnormal state among a plurality of flat pores 33 is connected.

The flat porous pipe 33 functions as a heat transfer pipe and exchanges heat between the heat transfer fin 32 and the outdoor air between the heat transfer fin 32 and the refrigerant flowing therein.

The outdoor heat exchanger (13) is provided with aluminum header aggregation tubes (34, 35) each provided at both ends of the heat exchanging section (31). The header collecting tube 34 has a cylindrical pipe structure made of aluminum and has internal spaces 34a and 34b divided by an aluminum baffle 34c. A heat exchanger side gas pipe 38 made of aluminum is connected to the upper internal space 34a and a liquid pipe 39 on the heat exchanger side made of aluminum is connected to the lower internal space 34b.

The header collecting tube 35 has a cylindrical pipe structure made of aluminum and is divided by baffles 35f, 35g, 35h and 35i made of aluminum to form internal spaces 35a, 35b, 35c, 35d and 35e . A plurality of flat porous pipes 33a for gas refrigerant connected to the inner space 34a at the upper portion of the header collecting pipe 34 are connected to the three inner spaces 35a, 35b and 35c of the header collecting pipe 35 . A plurality of flat pores 33b for liquid refrigerant connected to the internal space 34b under the header collecting pipe 34 are connected to the three internal spaces 35c, 35d and 35e of the header collecting pipe 35 .

The inner space 35a and the inner space 35e of the header collecting tube 35 are connected by a connection pipe 36 made of aluminum and the inner space 35b and the inner space 35d are connected to each other through an aluminum- (Not shown). The inner space 35c connects a part of the upper internal space (the portion connected to the internal space 34a) and a part of the lower internal space (the portion connected to the internal space 34b) of the heat exchanging portion 31 Also, With this configuration, the gas refrigerant supplied to the inner space 35a above the header collecting pipe 35 by the aluminum-made heat exchanger-side gas pipe 38 made of aluminum, for example, during cooling operation (functioning as a condenser) Exchanged at the upper part of the heat exchanging part 31 to partly liquefy and become a gas-liquid abnormal state, return to the header collecting tube 35, pass through the lower part of the heat exchanging part 31 to liquefy the remaining gas refrigerant, And exits from the liquid pipe 39 on the heat exchanger side.

6 is a partially enlarged view showing a sectional structure when cut into a plane perpendicular to the longitudinal direction of the flat pore tube 33 of the heat exchanging part 31 of the outdoor heat exchanger 13. Fig. The heat conductive fins 32 are thin aluminum plates, and a plurality of notches 32a extending in the horizontal direction are arranged in the heat conductive fins 32 in a vertical direction. The flat porous pipe 33 has upper and lower planar portions serving as heat transfer surfaces and a plurality of internal flow paths 331 through which the coolant flows. The flat perforated pipe 33, which is slightly thicker than the width of the notch 32a, is arranged in plural stages at intervals in a state in which the flat surface portion is directed upward and downward (the side surfaces of the flattened perforated pipe 33 are opposed to each other) And is fixed in the state of being fitted in the notch 32a. Thus, the heat transfer fin 32 and the flat pore tube 33 are soldered with the flat pore tube 33 inserted into the notch 32a of the heat transfer fin 32. [ Both ends of each flat porous pipe 33 are respectively fitted and soldered to the header collecting tubes 34 and 35.

The inner spaces 34a and 34b of the header collecting tube 34 and the inner spaces 35a and 35b of the header collecting tube 35 and the inner flow path 331 of the flat pore tube 33 are connected . A rectifying plate or the like for arranging the flow of the refrigerant is disposed in the inner spaces 34a and 34b of the header collecting tube 34 and the inner spaces 35a, 35b, 35c, 35d and 35e of the header collecting tube 35 , And detailed description of these details is omitted.

(2-2-2) Blower room side plate

7 is an enlarged side view of the blower chamber side lateral plate 23. Screw holes 23a and 23b are formed on the front side of the air inlet 20b of the air blower actual side plate 23 made of steel. The brackets 40 and 50 made of aluminum are fixed by means of a male screw 80 (see Fig. 16) made of iron which is screwed into the screw holes 23a and 23b and are soldered to the brackets 40 and 50 made of aluminum The aluminum header assembly tube 35 is fixed.

(2-2-3) Bracket made of aluminum

8 shows an aluminum bracket 40 for mounting the outdoor heat exchanger 13 to the blower chamber side plate 23. As shown in Fig. 8 (b) is a plan view of the bracket 40, Fig. 8 (c) is a front view of the bracket 40, and Fig. 8 Is a side view of the bracket (40).

The bracket 40 is formed by, for example, pressing one aluminum plate. Two nip pieces 42 to be attached to the header collecting pipe 35 of the outdoor heat exchanger 13 are extended from the body portion 41 of the bracket 40. [ The nip piece (42) is formed in an arc shape along the outer periphery of the cylindrical header collecting tube (35). In the bracket 40, two mounting pieces 43 are extended on the side opposite to the nipping pieces 42. The mounting piece 43 is provided with a through hole 43a for allowing the screw to pass through when mounted on the blower chamber side plate 23 or the like. The through hole 43a is an elliptical hole of m1 x n1. The fitting piece 43 is provided with a to-be-fitted portion 43b formed by notching a part of the upper end portion thereof in order to position the bracket 40 and the resin cover 60. [ The body portion 41 is provided with a sensor holding portion 44 formed into a concave shape. It can be considered that the shape of the sensor holding portion 44 forms the cylindrical hole 44a and the slit 44b. The slit 44b formed on the side opposite to the header collecting tube 35 is for bringing the temperature sensor 19 held by the sensor holding portion 44 into contact with the header collecting tube 35. [

A state in which the aluminum bracket 40 is soldered to the header collecting tube 35 is shown in Fig. The soldering of the bracket 40 to the header collecting tube 35 can be performed by, for example, forming a brazing material on the surface of the header collecting tube 35 in advance, 32 or a flat pouring tube 33 made of aluminum is put into the furnace while being assembled as shown in Fig. 5 or 6.

The bracket 40 is mounted around the inner space 35a shown in Fig. The internal dimensions of the cylindrical holes formed by the sensor holding portion 44 of the bracket 40 and the header collecting tube 35 are formed to be slightly smaller than the external teeth of the case of the temperature sensor 19 (see FIG. 9). And is fixed in the cylindrical hole by strongly pushing the temperature sensor 19 into the case.

Fig. 10 shows a bracket 50 made of aluminum. Fig. 10 (a) is a perspective view thereof, Fig. 10 (b) is a plan view thereof and Fig. 10 , And Fig. 10 (d) is a side view thereof. Similarly to the bracket 40, the bracket 50 is also formed by, for example, pressing one aluminum plate. The bracket 50 has the same configuration as the bracket 40, that is, the body portion 51, the nailing piece 52, and the mounting piece 53, though the bracket 50 is different in shape from the bracket 40. A through hole 53a is also formed in the mounting piece 53 although the opening position of the mounting piece 43 is different from that of the through hole 43a. These through holes 53a are also m1 x n1 elliptical holes. The fitting piece 53 is provided with a fitting portion 53b formed by notching a part of the end portion in order to position the bracket 50 and the resin cover 60. [ Since the temperature sensor 19 is not mounted on the bracket 50, the same configuration as that of 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 brackets 40 and 50 are brought into direct contact with the blower chamber side plate 23 made of a steel plate, the brackets 40 and 50 are brought into direct contact with each other, 40, 50) is promoted. Therefore, the resin cover 60 shown in Figs. 11, 12 and 13 is mounted on the brackets 40 and 50, and the resin cover 60 The brackets 40 and 50 are mounted. Fig. 11 (a) is a plan view of the resin cover, Fig. 11 (b) is a front view of the resin cover, and Fig. 11 (c) is a bottom view of the resin cover. Fig. 12 (a) is a left side view of the resin cover, Fig. 12 (b) is a rear view of the resin cover, and Fig. 12 (c) is a right side view of the resin cover. Fig. 13 (b) is a cross-sectional view taken along the line II-II in Fig. 12 (b), Fig. 13 (c) is a cross- Fig. 12C is an enlarged cross-sectional view taken along line III-III in Fig. 12C.

The resin cover 60 is also used for the two brackets 40 and 50 although the shapes of the brackets 40 and 50 are different. As a result, the shape of the resin cover 60 becomes complicated. The resin cover 60 is formed by, for example, one injection molding. The main body portion 61 of the resin cover 60 has an insertion portion 62 and an insertion portion 63 for mounting the mounting pieces 43 and 53 of the brackets 40 and 50. The mounting pieces 43 and 53 having the same shape among the two mounting pieces 43 and 53 having two pairs of brackets 40 and 50 are inserted into the inserting portion 62. The concave portion 65 at the front of the main body portion 61 has a shape conforming to the shape of the main body portion 41 of the bracket 40 and is processed into such a shape for mounting the temperature sensor 19. [

Fitting projections 62c and 63c protruding from a part of the top face are provided in the inserting portions 62 and 63 for positioning the brackets 40 and 50 and the resin cover 60. [ These fitting projections 62c and 63c are fitted to the fit portions 43b and 53b of the mounting pieces 43 and 53 of the brackets 40 and 50 so that the brackets 40 and 50 and the resin cover 60 In the front-rear direction is determined. On the other hand, the mounting pieces 43, 53 having different shapes from each other in the brackets 40, 50 are inserted into the inserting portions 63 surrounded by the upper surface, the back surface, and the right and left sides. The insertion portion 63 can correspond to the mounting pieces 43 and 53 which are different in shape from each other by opening two portions of the front surface and the bottom surface. The left and right side surfaces of the mounting pieces 43 and 53 inserted in the insertion portion 62 and the insertion portion 63 are covered with the resin cover 60. The resin cover 60 is interposed between the side plate 23 on the side of the resin cover 60 and the mounting pieces 43 and 53 so that the brackets 40 and 50 made of aluminum The brackets 40 and 50 can be fixed to the blower chamber side plate 23 without contacting the blower chamber side plate 23 directly.

The inner wall 62a and the outer wall 62b form the left and right side surfaces of the insertion portion 62. Openings 62aa and 62ba are formed in the inner wall 62a and 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 at the side is substantially the same as the shape of the m1 x n1 elliptical hole of the same size as the through holes 43a and 53a, to be.

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 differ in shape from each other, two openings 63ba and 63bb are formed in the outer wall 63b. The inner wall 63a also has openings 63aa and 63ab which are larger than the openings 63ba and 63bb at positions corresponding to the openings 63ba and 63bb. And extends from the inner walls 62a and 63a to the outer walls 62b and 63b through the openings 62ba and 62aa, the openings 63ba and 63bb and the openings 63aa and 63ab. The shape of the overlapping portion of the opening 63aa and the opening 63ba at the side is substantially the same as that of the m1 x n1 elliptical hole of the same size as the through holes 43a and 53a, to be. The shape of the overlapping portion of the opening 63ab and the opening 63bb at the side is the same as that of the m1 x n1 elliptical hole of the same size as the through holes 43a and 53a.

12 (b), the outer wall 62b is provided with an insertion portion 64 having an opening on the back side. The side plate portion 72 of the mounting plate 70, which will be described later, is inserted into the inserting portion 64. The brackets 40 and 50 made of aluminum to be inserted into the inserting portion 62 and the mounting plate 70 made of iron inserted into the inserting portion 64 are formed in the outer wall 62b, A partition 62bc of resin is present.

(2-2-5) Mounting plate

The mounting plate 70 is inserted into the resin cover 60 to fasten the brackets 40 and 50 and the resin cover 60 to the blower chamber side plate 23 with the male thread. 14 (a) and 14 (b) show the mounting plate 70, the top view thereof is shown in FIG. 14 (a), the front view thereof is shown in FIG. 14 And the right side view thereof is shown in Fig. 15 (b).

The mounting plate 70 is formed with side plate portions 72 and 73 that extend vertically from the left and right short sides of the horizontal base plate portion 71, respectively. The base portion 71 has a substantially rectangular shape with a concave portion 71c at the front. The width of the base portion 71 is substantially the same as the distance between the inner walls 62a and 63a of the resin cover 60. [ The mounting plate 70 is attached to the resin cover 60 in a state in which the front end portion 71a of the base portion 71 is brought into contact with the front stopper 61a of the body portion 61 of the resin cover 60 The side plate portion 72 of the mounting plate 70 is inserted into the inserting portion 64 of the resin cover 60 and the side plate portion 73 is brought into contact with the inner wall 63a of the resin cover 60 . The contact portion 73c of the side plate portion 73 comes into contact with the periphery of the back surface side of the insertion portion 63 and the front end portion 71a of the base portion 71 abuts on the front stopper 61a and the resin cover 60 The mounting plate 70 is not displaced forward. The rear end portion 71b of the base portion 71 is engaged with the rear end stopper 61b of the main body portion 61 of the resin cover 60 in a state in which the mounting plate 70 does not deviate forward, So that it does not move to the rear of the resin cover 60 as well.

The screw holes 72a, 73a and 73b formed in the side plate portions 72 and 73 are formed in the opening 62aa of the inner wall 62a of the resin cover 60 and the openings 63aa and 63b of the inner wall 63a, 63ab of the outer wall 63b, the opening 62ba of the outer wall 62b and the openings 63ba, 63bb of the outer wall 63b. The number of external threads of the male screw to be described later which is screwed into the threaded holes 72a, 73a and 73b is set so that the overlapping portions of the openings 62aa and 62ba, the overlapping portions of the openings 63aa and 63ba, 63ab, 63bb. Further, the number of external threads of the female thread is smaller than the internal dimensions of the through-holes (43a, 53a) of the brackets (40, 50) made of aluminum. The screw holes 72a (72a) of the mounting plate 70 are set so that the male screw is not brought into contact with the brackets 40, 50 or the resin cover 60 while the mounting plate 70 is correctly mounted on the resin cover 60 , 73a, 73b. These screw holes 72a, 73a and 73b are formed by burring.

When the mounting plate 70 is mounted on the resin cover 60, the upward movement of the mounting plate 70 is suppressed by abutting the top of the side plate portion 72 against the surface of the inserting portion 64.

(2-2-6) Assembly of bracket, resin cover and mounting plate

16 shows an assembled state in which the bracket 40 made of aluminum, the resin cover 60 and the mounting plate 70 made of iron are fixed to the side plate 23 on the side of the steel plate Respectively. 17 shows a state in which the bracket 40 made of aluminum, the resin cover 60 and the metal mounting plate 70 are assembled in a state in which the blower chamber side plate 23 is removed. As shown in Fig. 17, one side of the mounting piece 43 of the bracket 40 is mounted to the wind-up board 100. As shown in Fig.

On the inside of the resin cover 60, a metal mounting plate 70 is disposed in a state that the resin cover 60 covers the bracket 40 from the bracket 40. A male screw 80 penetrating through the through hole 43a of the bracket 40 and the opening 63aa of the resin cover 60 is fitted to the screw hole 73a of the mounting plate 70. [

18, the header collecting pipe 34 of the outdoor heat exchanger 13 is formed by a bracket 90 made of aluminum, a resin cover 92 and a metal mounting plate 93, The side plate 24, and the partition plate 28, respectively. The bracket 90 made of aluminum, the resin cover 92 and the metal mounting plate 93 have a structure similar to the above-described brackets 40 and 50, the resin cover 60 and the mounting plate 70 Therefore, the description will be omitted. This bracket 90 has two mounting pieces similarly to the brackets 40 and 50. These two mounting pieces are fixed to the machine room side plate 24 and the partition plate 28, respectively. The bracket 90 made of aluminum, the resin cover 92 and the metal mounting plate 93 are mounted on the brackets 40, 50, the resin cover 60, The structure may be changed from that of the second embodiment.

(3) Characteristics of outdoor unit

(3-1)

In the outdoor unit 2 described above, the nipping pieces 42 and 52 (fastening portions) of the aluminum brackets 40, 50 and 90 are directly mounted on the outdoor heat exchanger 13 made of aluminum, And the partition plates 28 and 28 (the structural parts made of non-aluminum metal) of the side plate 23, the machine room side plate 24 and the partition plate 28 made of steel plate, And the aluminum and the steel plate are not in contact with each other. The brackets 40 and 50 made of aluminum are fastened together in cooperation with a male screw 80 (an engaging part) made of iron (non-aluminum metal) and a steel mounting plate 70 (engaged structure) And is fixed to the blower chamber side plate (23). The bracket 90 made of aluminum is also fastened together with a male screw (not shown) made of iron and a mounting plate 93 (engaged structure) made of iron. The bracket 90 is made of a steel plate, (Not shown).

However, the outer diameter d (outer shape) of the male screw 80 (engaging part) 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 relation of the outer diameter d <the diameter (m1, n1) of the hole. The brackets 40, 50 and 90 made of aluminum are inserted through the resin covers 60 and 92 (nonmetal members) into the blower chamber side plate 23, the machine room side plate 24 and the partition plate 28 The brackets 40, 50 and 90 made of aluminum are fastened with screws made of iron (made of non-aluminum metal) passing through the through holes 43a and 53a of the mounting pieces 43 and 53 Contact state that does not come into contact with the resin cover 80 (80) by the resin covers (60, 92) (non-metal member). The through holes 43a and 53a of the fixing portion may be holes having a notch extending partly to the ends of the fixing portions (mounting pieces 43 and 53).

Thus, corrosion of the bracket caused by the corrosion between the iron (non-aluminum metal) and the aluminum metal is prevented because the iron screw (80) does not contact the brackets (40, 50, 90) made of aluminum. It is possible to prevent corrosion in the vicinity of the mounting pieces 43 and 53 of the aluminum brackets 40, 50 and 90 for mounting the aluminum outdoor heat exchanger 13, It is possible to prevent a problem such as loosening of the mounting portion 13 due to mounting.

Of course, the resin covers 60 and 92 are provided between the mounting pieces 43 and 53 of the brackets 40, 50 and 90, the blower chamber side lateral plate 23, the machine room side lateral plate 24 and the partition plate 28 So that they are kept in a non-contact state. As a result, the blower chamber side plate 23, the machine chamber side plate 24 and the partition plate 28 (structural components) of the steel sheet (non-aluminum metal) do not contact the aluminum brackets 40, 50 and 90 , Corrosion of the bracket due to corrosion occurring between steel (non-aluminum metal) and aluminum metal is also prevented between the structural parts.

In the above embodiment, a resin member such as a resin cover 60 or 92 is used as a nonmetal member. Examples of the nonmetal member include a member made of a polymer material such as a rubber member or a nonmetal inorganic material such as a ceramic member It may be absent. Of course, the non-metallic member referred to herein is a member made of a material which does not promote corrosion between aluminum and aluminum alloy rather than non-aluminum metal.

The blower room side plate 23 and the machine room side plate 24 (structural components) of the above-described steel plate (non-aluminum metal) are a unit casing 20 (a housing made of non-aluminum metal) made of steel. It is possible to fix the unit casing 20 with the brackets 40, 50 and 90 made of aluminum through the resin cover 60 so that the outdoor unit 2 can be made compact.

(3-2)

The resin cover 60 has inner walls 62a and 63a of the insertion portions 62 and 63 for fitting the mounting pieces 43 and 53 (fixing portions) of the aluminum brackets 40 and 50 from both sides, (Insertion structures) 62b and 63b. The male screw 80 and the mounting plate 70 are engaged with the insertion portions 62 and 63 of the resin cover 60 and the mounting of the brackets 40 and 50 made of aluminum And the pieces 43 and 53 are fastened. The mounting pieces 43 and 53 of the brackets 40 and 50 are engaged with the inner walls 62a and 63a of the resin cover 60 and the outer walls 62b and 63b so that the brackets 40, 50 can be firmly fixed to the resin cover 60. As a result, the fixing of the outdoor heat exchanger 13 made of aluminum can be strengthened, and the effect of preventing the occurrence of problems such as loosening of the installation of the outdoor heat exchanger 13 can be improved.

The aluminum bracket 90 has two mounting pieces similar to the mounting pieces 43 and 53 of the brackets 40 and 50 made of aluminum. It is possible to improve the stability of fixation of the outdoor heat exchanger 13 and to improve the stability of the outdoor heat exchanger 13, It is possible to prevent problems such as generation of noise due to shaking of the motor.

(3-3)

As described above, the positioning of the mounting plate 70 and the resin cover 60 can be easily performed by fastening the mounting plate 70 having the screw male screw holes 72a, 73a, and 73b with the male screw 80 of iron It becomes easier to handle. By using the male screw 80 made of iron, the engaging parts having required strength can be obtained inexpensively, so that the outdoor unit 2 can be provided at low cost. Since the screw holes 72a, 73a and 73b are subjected to the burring process, the male screw 80 can be fixed only by the mounting plate 70, so that the manufacturing cost of the out-room unit 2 can be reduced by reducing the number of parts can do.

(4) Variations

(4-1) Variation Example A

In the above-described embodiment, the case of using the aluminum heat exchanger 13 or the like made of aluminum is described. The aluminum heat exchanger 13 may be replaced with a member made of aluminum alloy, for example, An aluminum alloy outdoor heat exchanger can be used in place of the bracket 13, and a bracket made of an aluminum alloy can be used in place of the brackets 40, 50, and 90 made of aluminum.

(4-2) Variation B

In the above embodiment, the case where iron or steel is used as the non-aluminum metal has been described, but other metals such as copper or a copper alloy may be used.

(4-3) Variation C

Although the molded resin of the resin cover 60 is used in the above embodiment, it may be formed of a different material such as a composite member such as ceramic or prepreg.

(4-4) Modification D

Although the engaging structure of the externally threaded structure 80 is described using the mounting plate 70 in the above embodiment, the engaging structure to be engaged may be an iron nut or a male screw 80 80 provided on the resin cover 60, or an engaging member other than a screw or an engaged structure may be used.

(4-5) Variation E

The screw holes 72a, 73a, and 73b of the mounting plate 70 may be replaced with the screw holes 72a, 73a, and 73b of the mounting plate 70. In this embodiment, the male screw 80 is mounted on the mounting plate 70 A screw hole is formed in the side plate 23 or the machine room side plate 24 or the partition plate 28 so that the male screw 80 is screwed into the side of the blower chamber side plate 23 or the side of the machine room side plate 24 or the partition plate 28 The brackets 40, 50, and 90 made of aluminum or the resin covers 60 and 92 may be fixed. In this case, the screw holes of the blower chamber side plate 23, the machine room side plate 24, and the partition plate 28 are engaged with each other.

1 air conditioner
2 outdoor unit
3 indoor units
13 outdoor heat exchanger
20 unit casing
34, 35 Header collection
40, 50, 90 Bracket
60, 92 Resin cover
70, 93 mounting plate

Claims (6)

A heat exchanger 13 made of aluminum or aluminum alloy and through holes 43a and 53a for fastening to the fixing parts 42 and 52 directly mounted on the heat exchanger and the structural parts 23 and 24 and 28 made of non- (40, 50, 90) made of aluminum or aluminum alloy having fixing portions (43, 53) having fixing portions (43, 53), and a bracket (2) of a refrigeration system having nonmetal members (60, 92)
An engaging part (80) made of a non-aluminum metal having an outer shape smaller than the through hole of the fixing part,
Further comprising a to-be-engaged structure (70, 93) for fastening the fixed part of the bracket to the structural part through the non-metallic member in cooperation with the engaging part,
Wherein the non-metallic member is a non-metallic member, which retains the non-contact state of the bracket made of aluminum or aluminum alloy and the non-aluminum metal-made engaging part in a state in which the engaging part penetrates through the through- Of outdoor units. The method according to claim 1,
Further comprising a non-aluminum metal housing (20) for housing said heat exchanger made of aluminum or aluminum alloy,
Wherein said housing of non-aluminum metal is said structural part of non-aluminum metal. The method of claim 2,
The non-metallic member has insertion structures (62a, 62b, 63a, 63b) for fitting the fixed portion of the bracket from both sides,
Wherein the engaging part and the engaged structure engage the inserting structure of the nonmetal member with the retaining part of the bracket made of aluminum or aluminum alloy. The method of claim 3,
The engagement part is a non-aluminum metal male thread 80,
The engaged structure includes a mounting plate (70, 93) having a screw that can be engaged with the male screw, a mounting plate (70, 93) that can be engaged with the male screw, Wherein the outdoor unit is a female screw part of the non-metallic member. The method of claim 4,
Wherein the mounting plate has a burring process applied to the screw hole. The method according to any one of claims 1 to 5,
The bracket (90) has a plurality of the fixing portions.

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