WO2023048079A1 - Heat exchange unit and refrigeration cycle device - Google Patents

Abstract

This heat exchange unit is provided with: a heat exchanger having a header formed of metal; a casing that accommodates the heat exchanger and is formed of a metal having a smaller ionization tendency than that of the header; and an electrically insulating securing member that is secured to both the header and the casing so as to separate the header and the casing from each other. A drainage channel is formed in a contact surface of the securing member in contact with the header.

Description

Heat exchange unit and refrigeration cycle device

An embodiment of the present invention relates to a heat exchange unit and a refrigerating cycle device.
This application claims priority based on Japanese Patent Application No. 2021-155547 filed in Japan on September 24, 2021, the content of which is incorporated herein.

Corrosion countermeasures for heat exchangers made of metal such as aluminum are essential. In particular, when dissimilar metals come into contact with each other via electrolyzed water, ions move from a material with a high (high) ionization tendency (noble material) to a material with a low (low) ionization tendency (noble material). Corrosion of materials occurs. If material corrosion occurs in a heat exchanger, there is a problem that refrigerant leaks and the refrigeration cycle stops functioning. In particular, at present, refrigerant pipes and housings mainly used in refrigeration cycle devices are made of copper or steel. Since copper and steel have a lower ionization tendency than aluminum, aluminum corrodes. As described above, it is necessary to avoid contact with dissimilar metals in heat exchangers made of aluminum.
At the same time, water stagnation around the heat exchanger should be avoided to prevent corrosion.

Japanese Patent Application Laid-Open No. 2013-137122

The problem to be solved by the present invention is to provide a heat exchange unit and a refrigeration cycle device that can suppress damage to the header due to corrosion while fixing the header and the housing to each other.

The heat exchange unit of the embodiment has a heat exchanger, a housing, and a fixing member. The heat exchanger has a header made of metal. The housing is made of a metal having a lower ionization tendency than the header, and accommodates the heat exchanger. The fixing member has electrical insulation and is fixed to the header and the housing so that the header and the housing are separated from each other. A contact surface of the fixing member that contacts the header is formed with a drainage groove.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the refrigerating-cycle apparatus of one Embodiment. FIG. 2 is a partially cutaway plan view of the outdoor unit of the refrigeration cycle apparatus of one embodiment. The perspective view in the principal part of the outdoor heat exchanger of the refrigerating-cycle apparatus of one Embodiment, and a 1st support member. 1 is a partially cutaway perspective view of a flat plate heat exchanger of a refrigeration cycle apparatus according to one embodiment; FIG. The top view in the principal part of the outdoor heat exchanger of the refrigerating-cycle apparatus of one Embodiment, and a 1st support member. FIG. 2 is a perspective view of the main part of the fins of the flat plate-shaped heat exchanger of the refrigeration cycle apparatus of one embodiment; The perspective view of the fixing member of the refrigeration cycle apparatus of one embodiment. The top view of the principal part of the flat plate-shaped heat exchanger and the 1st support member in the outdoor unit of the 1st modification of one Embodiment. The perspective view of the fixing member in the outdoor unit of the 2nd modification of one Embodiment. The top view of the principal part in the outdoor unit of the 3rd modification of one Embodiment.

A heat exchange unit and a refrigeration cycle device according to embodiments will be described below with reference to the drawings.

As shown in FIG. 1, the refrigeration cycle device 1 includes a compressor 10, a four-way valve 11, an outdoor unit (heat exchange unit) 12 of the present embodiment, an expansion device 13, and an indoor unit ( a heat exchange unit) 14; Components such as the compressor 10 in the refrigeration cycle apparatus 1 are connected in sequence by pipes 15 .
In FIG. 1 , the flow direction of the refrigerant (heat medium) during cooling operation is indicated by a solid line arrow, and the flow direction of the refrigerant during heating operation is indicated by a broken line arrow. FIG. 1 shows a state in which the compressor 10, the four-way valve 11, and the expansion device 13 are taken out from an outdoor housing 20, which will be described later, of the outdoor unit 12. As shown in FIG.

The compressor 10 has a compressor body 10a and an accumulator 10b. The compressor main body 10a compresses the low-pressure gaseous refrigerant taken therein into a high-temperature, high-pressure gaseous refrigerant. The accumulator 10b separates the gas-liquid two-phase refrigerant and supplies the gas refrigerant to the compressor body 10a.

The four-way valve 11 reverses the flow direction of the refrigerant to switch between cooling operation and heating operation.
As shown in FIG. 2, the outdoor unit 12 includes the compressor 10, the four-way valve 11, the expansion device 13, an outdoor housing (housing) 20, an outdoor heat exchanger (heat exchanger) 21, and an outdoor It has a blower 22 and a fixing member 23. The four-way valve 11 and the expansion device 13 are not shown in FIG.
The outer shape of the housing 20 is rectangular parallelepiped. The outdoor housing 20 has a bottom plate 26, a side plate 27, a partition plate 28, a top plate (not shown), a first support member 29A, and a second support member 29B.

The bottom plate 26 is formed in a flat plate shape presenting a rectangular shape in plan view. The bottom plate 26 is arranged such that the thickness direction of the bottom plate 26 is along the horizontal plane. Bases 32 are fixed to both ends of the lower surface of the bottom plate 26 in the longitudinal direction. Each mount 32 is arranged on the installation surface F of the outdoor unit 12 .
Hereinafter, the longitudinal direction of the bottom plate 26 will be referred to as the longitudinal direction U, and the lateral direction of the bottom plate 26 will be referred to as the lateral direction V. As shown in FIG.

The side plate 27 has a rectangular frame shape in plan view. The side plate 27 has a front side plate 34 , a rear side plate 35 , a right side plate 36 and a left side plate 37 . The front side plate 34 , the rear side plate 35 , the right side plate 36 and the left side plate 37 each extend upward from the outer peripheral edge of the bottom plate 26 . The front side plate 34 and the rear side plate 35 are provided on the edge of the bottom plate 26 in the width direction V. As shown in FIG. Below, the front side plate 34 side with respect to the rear side plate 35 in the width direction V is referred to as the first side V1. The rear side plate 35 side with respect to the front side plate 34 in the lateral direction V is referred to as a second side V2.
The right side plate 36 and the left side plate 37 are provided on the edge of the bottom plate 26 in the longitudinal direction U. As shown in FIG. Hereinafter, the side of the right side plate 36 with respect to the left side plate 37 in the longitudinal direction U is referred to as a first side U1. The left side plate 37 side with respect to the right side plate 36 in the longitudinal direction U is called a second side U2.

The top plate seals the opening formed at the upper end of the side plate 27 .
The front side plate 34, the rear side plate 35, the right side plate 36, and the left side plate 37 are formed with vent holes (not shown).
The partition plate 28 partitions the space above the bottom plate 26 in the longitudinal direction U. The partition plate 28 is arranged at a position closer to the first side U1 than the center of the bottom plate 26 in the longitudinal direction U. Compressor 10 is fixed on bottom plate 26 at a position between partition plate 28 and right side plate 36 .

In this embodiment, the configuration of the first support member 29A and the configuration of the second support member 29B are the same. For this reason, the configuration of the first support member 29A is indicated by adding a capital letter "A" to numerals of symbols or numbers and lowercase letters. The configuration of the second support member 29B corresponding to the first support member 29A is indicated by the same numerals as those of the first support member 29A, or by adding a capital letter "B" to the numerals and lower case letters. Therefore, overlapping explanations will be omitted. For example, a later-described first support piece 40A of the first support member 29A and a second support piece 40B of the second support member 29B have the same configuration.

As shown in FIG. 3, the first support member 29A has a first part first support piece 40A and a first part second support piece 41A. Note that the fins 62, which will be described later, are not shown in FIG. 3, and FIGS. 5 and 8, which will be described later.
The first part first support piece 40A has a support piece main body 44A and a connection piece 45A. The support piece main body 44A is formed in a flat plate shape having a rectangular shape when viewed in the thickness direction of the support piece main body 44A. 44 A of support piece main bodies are arrange|positioned so that the thickness direction of 44 A of support piece main bodies may orthogonally cross the transversal direction V. As shown in FIG. The support piece body 44A extends vertically. A notch 44aA is formed at the upper end of the support piece main body 44A, which is the end on the second side U2.
A plurality of (three in this embodiment) through-holes 44bA are formed in a portion of the support piece main body 44A below the notch 44aA. The plurality of through holes 44bA are arranged at intervals in the vertical direction.

The connection piece 45A protrudes from the edge of the notch 44aA on the first side U1 of the support piece main body 44A to the second side V2.

The first part second support piece 41A has a support piece body 48A and a connection piece 49A. Like the support piece main body 44A, the support piece main body 48A is formed in a flat plate shape having a rectangular shape when viewed in the thickness direction of the support piece main body 48A. 48 A of support piece main bodies are arrange|positioned so that the thickness direction of 48 A of support piece main bodies may orthogonally cross the width direction V. As shown in FIG. The support piece body 48A extends vertically. A notch 48aA is formed at the upper end of the support piece main body 48A, which is the end on the second side U2. A plurality of (three in this embodiment) through-holes (not shown) are formed in a portion of the support piece main body 48A below the notch 48aA. The plurality of through holes are vertically spaced apart from each other.
The connection piece 49A protrudes from the edge of the notch 48aA on the first side U1 of the support piece main body 48A to the first side V1.

Support piece bodies 44A and 48A of support pieces 40A and 41A are arranged to face each other.
The portion on the second side V2 of the connection piece 45A of the first support piece 40A of the first section 40A is arranged so as to be overlapped in the longitudinal direction U with the portion on the first side V1 of the connection piece 49A of the second support piece 41A of the first section. ing. A portion of the connection piece 45A on the second side V2 and a portion of the connection piece 49A on the first side V1 are fixed to each other by a fixing member 51A such as a screw.
As shown in FIG. 2, the first part second support piece 41A of the first support member 29A is fixed to the rear side plate 35 of the side plate 27 by a fixing material (not shown). The first support member 29A is located on the first side V1 of the rear plate 35 and on the second side U2 of the partition plate 28. As shown in FIG.

The second supporting member 29B includes a second supporting piece 40B and a second supporting piece 40B having the same configuration as the first supporting piece 40A and the second supporting piece 41A of the first supporting member 29A. It has a piece 41B.
The second part first support piece 40B is fixed to the left side plate 37 of the side plate 27 by a fixing member (not shown). The second support member 29B is arranged at a position closer to the first side U1 than the left side plate 37 is.

The bottom plate 26, the side plates 27, the top plate, the partition plate 28, and the support members 29A, 29B, which constitute the outdoor housing 20, are each formed of steel in a plate shape.

As shown in FIG. 2, the outdoor heat exchanger 21 has an L shape in plan view. The outdoor heat exchanger 21 has a first partial heat exchanger 55 and a second partial heat exchanger 56 .
The first partial heat exchanger 55 is formed in a flat plate shape and arranged so that the thickness direction of the first partial heat exchanger 55 is along the lateral direction V. As shown in FIG.
The second partial heat exchanger 56 is formed in a flat plate shape and arranged so that the thickness direction of the second partial heat exchanger 56 is along the longitudinal direction U. As shown in FIG. The second partial heat exchanger 56 extends from the end of the first partial heat exchanger 55 on the second side U2 toward the first side V1.

In this embodiment, the entire outdoor heat exchanger 21 is made of metal such as aluminum or an aluminum alloy. The outdoor heat exchanger 21 is formed by bending a flat heat exchanger (heat exchanger) 21a shown in FIGS. 4 and 5 into an L shape.
The flat plate heat exchanger 21 a includes a first header (header) 59 , a second header (header) 60 , a plurality of heat transfer tubes 61 , a plurality of fins 62 , a first refrigerant port 63 and a second refrigerant port 64 . and have

In this example, the first header 59 and the second header 60 are each plate headers. A plate header is formed by stacking a plurality of plates. Each of the plurality of plates is formed with a hole penetrating in the thickness direction of the plate header. For example, a plurality of plates are joined to each other by brazing to form a coolant space in which a coolant flows within the plurality of plates.
The headers 59 and 60 are rectangular parallelepipeds extending in the first direction X. As shown in FIG. In this embodiment, the headers 59 and 60 are arranged so that the first direction X extends along the vertical direction.
In the headers 59 and 60, multiple plates are stacked in a second direction Y perpendicular to the first direction X. As shown in FIG. Note that the second direction Y may be a direction intersecting with the first direction X. The second direction Y is the lateral direction of the first header 59 .
The headers 59 and 60 are spaced apart from each other in the second direction Y. As shown in FIG. Hereinafter, the side of the second header 60 with respect to the first header 59 in the second direction Y is referred to as the first side Y1. A side of the first header 59 with respect to the second header 60 in the second direction Y is referred to as a second side Y2.
In this embodiment, the second direction Y is a direction along the horizontal plane.

Each heat transfer tube 61 extends in the second direction Y. As shown in FIG. A flat tube is used for the heat transfer tube 61 . That is, the outer diameter of the heat transfer tube 61 in the first direction X is shorter than the outer diameter in the third direction Z orthogonal to the first direction X and the second direction Y, respectively. One side of the third direction Z is hereinafter referred to as the first side Z1. The other side of the third direction Z is called a second side Z2.
The third direction Z may be a direction that intersects the first direction X and the second direction Y, respectively.
The plurality of heat transfer tubes 61 are arranged side by side in the first direction X at intervals. A plurality of heat transfer tubes 61 (two rows in this embodiment) are arranged side by side in the third direction Z at intervals.
The headers 59 and 60 are provided at the ends in the second direction Y of the plurality of heat transfer tubes 61 .

As shown in FIG. 6, the fin 62 is formed in a plate shape that exhibits a rectangular shape when viewed in the second direction Y. As shown in FIG. The fins 62 extend in the first direction X. As shown in FIG. The fin 62 is formed with a plurality of slits 62a. The plurality of slits 62a are arranged side by side in the first direction X at intervals. The plurality of slits 62a reach the ends of the fins 62 on the second side Z2.
Peripheral portions of the plurality of slits 62 a of the fin 62 are fitted with the plurality of heat transfer tubes 61 . As shown in FIG. 4, the plurality of fins 62 are arranged side by side in the second direction Y. As shown in FIG.

The first coolant port 63 and the second coolant port 64 are each formed in a tubular shape. Refrigerant ports 63 and 64 are fixed to the second header 60 . The pipeline of the first refrigerant port 63 continues to the pipeline of the second refrigerant port 64 via the refrigerant spaces of the headers 59 and 60 and the multiple pipelines of the heat transfer tubes 61 .
Refrigerant ports 63 and 64 are connected to pipe 15 .

The outdoor housing 20 is made of metal (steel) having a lower ionization tendency than the headers 59 and 60 . As shown in FIG. 2 , the outdoor housing 20 accommodates an outdoor heat exchanger 21 .
An axial fan is used as the outdoor blower 22 . The outdoor fan 22 is arranged so as to face the first partial heat exchanger 55 of the outdoor heat exchanger 21 . The axis of the outdoor fan 22 extends along the short direction V. As shown in FIG. The outdoor fan 22 is particularly arranged so as to face the plurality of heat transfer tubes 61 of the first partial heat exchanger 55 .
The outdoor fan 22 is arranged on the first side V<b>1 of the first partial heat exchanger 55 and on the first side U<b>1 of the second partial heat exchanger 56 .

As shown in FIG. 4, a plurality of fixing members 23 are fixed to headers 59 and 60 of flat plate heat exchanger 21a (outdoor heat exchanger 21). In the present embodiment, three fixing members 23 are arranged on the first header 59 at intervals in the vertical direction, and three fixing members 23 are arranged on the second header 60 at intervals in the vertical direction. ing.
The plurality of fixing members 23 have the same shape. Below, among the plurality of fixing members 23, the fixing member 23 fixed to the upper end portion of the first header 59 will be described.

As shown in FIGS. 5 and 7, the fixing member 23 has a first fixing piece 67 and a second fixing piece 68. As shown in FIG. That is, the fixing member is composed of two members.
The first fixing piece 67 includes a first body 71, a first part first arm 72, a first part second arm 73, a first part third arm 74, and a first part fourth arm 75. have
The first main body 71 is formed in a flat plate shape having a rectangular shape when viewed in the third direction Z. As shown in FIG. The first body 71 extends in the second direction Y. As shown in FIG. A through hole 71a penetrating through the first main body 71 in the third direction Z is formed at the end of the first main body 71 on the second side Y2. The surface of the first main body 71 facing the second side Z2 is the contact surface 71 b that contacts the first header 59 . The contact surface 71b contacts the surface of the first header 59 facing the first side Z1.

As shown in FIG. 7, the first part first arm 72 has a first part first main body 72a, a first part first small diameter part 72b, and a first part first large diameter part 72c.
The first part first main body 72a has a rectangular parallelepiped shape extending in the third direction Z. As shown in FIG. The first part first main body 72a is an upper end of the first main body 71 and extends from the end of the first side Y1 toward the second side Z2.
The lengths in the first direction X of the first portion first small diameter portion 72b and the first portion first large diameter portion 72c are equal to the lengths in the first direction X of the first portion first main body 72a. Positions of the second side Y2 end of the first part first main body 72a, the second side Y2 end of the first part first small diameter part 72b, and the second side Y2 end of the first part first large diameter part 72c are identical to each other.
The first portion first small diameter portion 72b protrudes toward the second side Z2 from the portion of the second side Y2 at the end of the second side Z2 of the first portion first main body 72a.

The first portion first large diameter portion 72c protrudes toward the second side Z2 from the end of the first portion first small diameter portion 72b on the second side Z2. The first portion first large diameter portion 72c protrudes to the first side Y1 more than the first portion first small diameter portion 72b. That is, a step is formed in the second direction Y between the first portion first large diameter portion 72c and the first portion first small diameter portion 72b.
An end face 72c1 on the second side Z2 side of the first large diameter portion 72c is gradually inclined toward the first side Y1 as it goes toward the first side Z1. In other words, the end surface 72c1 is an inclined surface inclined at an acute angle with respect to each of the first side Z1 and the first side Y1.
A surface of the first arm 72 facing the second side Y2 is a contact surface 72 d that contacts the first header 59 .

The first part second arm 73 extends from the upper end portion of the first body 71 and the intermediate portion in the second direction Y toward the second side Z2. The first part second arm 73 and the first part first arm 72 are spaced apart from each other in the second direction Y. As shown in FIG. Here, a first reference plane S1 that is arranged between the first part first arm 72 and the first part second arm 73 and that is perpendicular to the second direction Y is defined. The first part second arm 73 is plane-symmetrical with respect to the first part first arm 72 with respect to the first reference plane S1.
The first part second arm 73 is formed corresponding to the first part first body 72a, the first part first small diameter part 72b, and the first part first large diameter part 72c of the first part first arm 72. , a second main body of the first part, a second small diameter part of the first part, and a second large diameter part of the first part (reference numerals omitted). An end surface 73c1 is formed in the first portion second large diameter portion.
The first part first arm 72 is arranged on the first side Y1 where the plurality of heat transfer tubes 61 extend from the first header 59 rather than the first part second arm 73 . As shown in FIG. 5, the distance between the first arm 72 of the first part and the second arm 73 of the first part and the length of the first header 59 in the second direction Y are equal to each other. The first arm 72 of the first part and the second arm 73 of the first part sandwich the first header 59 in the second direction Y. As shown in FIG.

As shown in FIG. 7, the first part third arm 74 extends from the end of the first side Y1 toward the second side Z2 at the lower end of the first main body 71 . Here, a second reference plane S2 is arranged between the first part first arm 72 and the first part third arm 74 and perpendicular to the first direction X is defined. The first part third arm 74 is plane-symmetrical with respect to the first part first arm 72 with respect to the second reference plane S2.
The first part fourth arm 75 is plane-symmetrical with respect to the first part second arm 73 with respect to the second reference plane S2.
In the contact surface 71b of the first body 71 and between the arms 72, 74 and the arms 73, 75, there is a drainage groove 71c extending in the first direction X (vertical direction) along the contact surface 71b. Multiple are formed. The plurality of drain grooves 71c penetrate the first main body 71 in the vertical direction. The length (width) in the second direction Y and the length (depth) in the third direction Z of each drainage groove 71c are constant regardless of the position in the first direction X.
Note that the number of drain grooves 71c formed in the first main body 71 may be one.

The first main body 71, the first part first arm 72, the first part second arm 73, the first part third arm 74, and the first part fourth arm 75, which constitute the first fixing piece 67, are made of polypropylene resin or the like. are integrally formed of a material having an electrical insulation property of

The second fixing piece 68 includes a second body 81, a second part first arm 82, a second part second arm 83, a second part third arm 84, and a second part fourth arm 85. have
The second main body 81 is formed in a flat plate shape having a rectangular shape when viewed in the third direction Z. As shown in FIG. The second main body 81 extends in the second direction Y. As shown in FIG. A through hole 81a that penetrates the second main body 81 in the third direction Z is formed at the end portion of the second side Y2 of the second main body 81 . As shown in FIG. 5, the surface of the second main body 81 facing the first side Z1 is the contact surface 81b that contacts the first header 59. As shown in FIG. The contact surface 81b contacts the surface of the first header 59 facing the second side Z2.

As shown in FIG. 7, the second part first arm 82 has a second part first main body 82a, a second part first small diameter part 82b, and a second part first large diameter part 82c.
The second part first main body 82a has a rectangular parallelepiped shape extending in the third direction Z. As shown in FIG. The second part first main body 82a is an upper end of the second main body 81 and extends from the end of the first side Y1 toward the first side Z1.
The lengths in the first direction X of the second portion first small diameter portion 82b and the second portion first large diameter portion 82c are equal to the lengths in the first direction X of the second portion first main body 82a. Positions of the first side Y1 end of the second part first body 82a, the first side Y1 end of the second part first small diameter part 82b, and the first side Y1 end of the second part first large diameter part 82c are identical to each other.
The second portion first small diameter portion 82b protrudes toward the first side Z1 from the portion of the first side Y1 at the end of the first side Z1 of the second portion first main body 82a.

The second portion first large diameter portion 82c protrudes toward the first side Z1 from the end of the second portion first small diameter portion 82b on the first side Z1. The second portion first large diameter portion 82c protrudes further to the second side Y2 than the second portion first small diameter portion 82b. That is, a step is formed in the second direction Y between the second portion first large diameter portion 82c and the second portion first small diameter portion 82b.
A surface of the second part first arm 82 facing the second side Y2 is a contact surface 82 d that contacts the first header 59 .

The second part second arm 83 extends from the upper end of the second main body 81 and the intermediate portion in the second direction Y toward the first side Z1. The second part second arm 83 and the second part first arm 82 are spaced apart from each other in the second direction Y. As shown in FIG. The second part second arm 83 is plane-symmetrical with respect to the second part first arm 82 with respect to the first reference plane S1.
The second part second arm 83 is formed corresponding to the second part first main body 82a, the second part first small diameter part 82b, and the second part first large diameter part 82c of the second part first arm 82. , a second main body, a second small-diameter portion, and a second large-diameter portion (reference numerals omitted).
The second part first arm 82 is arranged on the first side Y1 relative to the second part second arm 83 . As shown in FIG. 5, the distance between the second part first arm 82 and the second part second arm 83 and the length of the first header 59 in the second direction Y are equal to each other. The second part first arm 82 and the second part second arm 83 sandwich the first header 59 in the second direction Y. As shown in FIG.

As shown in FIG. 7, the second part third arm 84 extends from the end of the first side Y1 toward the first side Z1 at the lower end of the second main body 81 . The second part third arm 84 is plane-symmetrical with respect to the second part first arm 82 with respect to the second reference plane S2.
The second part fourth arm 85 is plane-symmetrical with respect to the second part second arm 83 with respect to the second reference plane S2.
At the contact surface 81b of the second body 81 and between the arms 82, 84 and the arms 83, 85, a plurality of drainage grooves 81c are formed to extend vertically along the contact surface 81b. The plurality of drain grooves 81c penetrate the second main body 81 in the vertical direction. The length (width) in the second direction Y and the length (depth) in the third direction Z of each drainage groove 81c are constant regardless of the position in the first direction X.
Note that the number of drain grooves 81c formed in the second main body 81 may be one.

The second main body 81, the second part first arm 82, the second part second arm 83, the second part third arm 84, and the second part fourth arm 85, which constitute the second fixing piece 68, It is integrally formed of the same electrically insulating material as the piece 67 .

The second fixed piece 68 is detachably fitted to the first fixed piece 67 . Specifically, the step of the first arm 72 of the first fixing piece 67 engages the step of the first arm 82 of the second fixing piece 68 in the third direction Z. . Such engagement between the steps can be released by separating the two steps in the second direction Y. As shown in FIG. Thus, the first part first arm 72 is detachably fitted to the second part first arm 82 . Similarly, the first part second arm 73 is detachably fitted to the second part second arm 83 . The first section third arm 74 is detachably fitted to the second section third arm 84 . The first part fourth arm 75 is detachably fitted to the second part fourth arm 85 .

As shown in FIG. 3, the heat transfer tubes 61 arranged in the third direction Z of the outdoor heat exchanger 21 are arranged between the arms 72 and 74 of the first fixed piece 67 and between the arms 82 and 84 of the second fixed piece 68. are placed.
The first support piece 40A is attached to the first support piece 40A by fixing members 88 such as screws disposed in the through hole 44bA of the first support piece 40A and the through hole 71a of the first fixed piece 67, respectively. 67 is fixed. Similarly, a second fixed piece 68 is fixed to the first part second support piece 41A.
As described above, the fixing member 23 is fixed to the first header 59 and the outdoor housing 20 respectively so that the first header 59 and the outdoor housing 20 are separated from each other. The second fixed piece 68 is fixed to the first header 59 and the outdoor housing 20 together with the first fixed piece 67 .

As shown in FIG. 1, the indoor unit 14 has an indoor housing 91, an indoor heat exchanger (heat exchanger) 92, and an indoor fan (not shown).
The indoor housing 91 and the indoor heat exchanger 92 have known configurations. In addition, the indoor housing 91 and the indoor heat exchanger 92 may be fixed to each other by the fixing member 23 .
The indoor fan is arranged so as to face the indoor heat exchanger 92 .

The compressor 10, the four-way valve 11, the outdoor unit 12, the expansion device 13, and the indoor unit 14 are filled with refrigerant (not shown).

In the refrigeration cycle apparatus 1 configured as described above, the following steps are performed to fix the fixing member 23 to the first header 59 .
For example, first, the first fixed piece 67 is attached to the first header 59 . At this time, the first header 59 is sandwiched in the second direction Y between the arms 72 and 74 and the arms 73 and 75 . Furthermore, the heat transfer tube 61 of the outdoor heat exchanger 21 is sandwiched in the first direction X between the first arm 72 of the first part and the third arm 74 of the first part.
The arms 82, 83, 84, 85 of the second fixing piece 68 are butted against the arms 72, 73, 74, 75 of the first fixing piece 67, respectively. Since the arms 72, 73, 74, and 75 are formed with inclined end surfaces 72c1 and 73c1, the arms 82 and 83 are elastically opened in the second direction Y as indicated by the two-dot chain line in FIG. elastically deformed so that the arms 84 and 85 open in the second direction Y with respect to each other.

When the arms 82, 83, 84, 85 get over the steps of the arms 72, 73, 74, 75, the arms 82, 83, 84, 85 are elastically restored. Arms 82 , 83 , 84 , 85 fit onto arms 72 , 73 , 74 , 75 .
The fixing member 23 is fixed to the first header 59 by the above steps.

In the refrigeration cycle apparatus 1 configured as described above, refrigerant flows through the compressor 10, the four-way valve 11, the outdoor heat exchanger 21, the expansion device 13, and the indoor heat exchanger 92 in order during cooling operation. The outdoor fan 22 and the indoor fan operate. At this time, the refrigeration cycle device 1 causes the outdoor heat exchanger 21 to function as a condenser and the indoor heat exchanger 92 to function as an evaporator to cool the room.
When the outdoor blower 22 operates, the air sucked through the vent of the side plate 27 exchanges heat with the refrigerant in the outdoor heat exchanger 21 and is discharged to the outside of the housing 20 through the vent of the side plate 27. - 特許庁
When the refrigeration cycle device 1 performs heating operation, refrigerant flows through the compressor 10, the four-way valve 11, the indoor heat exchanger 92, the expansion device 13, and the outdoor heat exchanger 21 in this order. At this time, the refrigerating cycle apparatus 1 causes the indoor heat exchanger 92 to function as a condenser, and the outdoor heat exchanger 21 to function as an evaporator to heat the room.

The outdoor heat exchanger 21 may be condensed when the refrigeration cycle device 1 performs heating operation. The water droplets due to condensation are formed in the area including the surface facing the first side Y1, the surface facing the first side Z1, and the surface facing the second side Z2 of the first header 59 shown in FIG. Easy to adhere to R1.

As described above, in the outdoor unit 12, the fixing member 23 is fixed to the first header 59 and the outdoor housing 20 so that the first header 59 and the outdoor housing 20 are separated from each other. Therefore, it is possible to prevent the first header 59 from being damaged by corrosion while fixing the first header 59 and the outdoor housing 20 to each other.
Furthermore, drain grooves 71c and 81c are formed in the contact surfaces 71b and 81b of the fixing member 23, respectively. As a result, the water accumulated above the fixing member 23 flows downward through the drainage grooves 71c and 81c. It becomes difficult for water to accumulate in the first header 59 .
Since corrosion is more likely to occur with water, it is possible to more reliably suppress damage to the first header 59 due to corrosion.

The first header 59 is a plate header. Therefore, the first header 59 can be configured by joining a plurality of plates together.
The drainage grooves 71c and 81c extend in the first direction X along which the first header 59 extends. Therefore, by arranging the outdoor heat exchanger 21 so that the first direction X is the vertical direction, the water accumulated on the fixing member 23 can easily flow downward through the drainage grooves 71c and 81c.

The fixing member 23 has a first fixing piece 67 and a second fixing piece 68 which are detachably fitted. To easily fix the first header 59 and the outdoor housing 20 by respectively fixing the first header 59 and the outdoor housing 20 using the first fixing piece 67 and the second fixing piece 68 which are detached from each other. can be done.
The first fixing piece 67 has a first main body 71 , a first part first arm 72 and a first part second arm 73 . The second fixing piece 68 has a second body 81 , a second part first arm 82 and a second part second arm 83 . For example, the arms 82 and 83 are fitted to the arms 72 and 73 with the first header 59 sandwiched in the second direction Y by the arms 72 and 73 . Therefore, the fixing pieces 67 and 68 can be easily fitted to each other.

Further, in the refrigerating cycle device 1 of the present embodiment, the refrigerating cycle device 1 is configured using the outdoor unit 12 capable of suppressing damage to the header due to corrosion while fixing the first header 59 and the housing to each other. can do.

As described below, the configuration of the outdoor unit 12 of this embodiment can be modified in various ways.
A fixing member 96 of an outdoor unit 95 of a first modified example shown in FIG. 8 is formed with a drainage groove 72e in addition to each configuration of the fixing member 23 of the above-described embodiment. The drain groove 72 e is formed on the contact surface 72 d of the first arm 72 of the first fixed piece 67 . The drain groove 72e extends in the first direction X and penetrates the first arm 72 in the first direction X. As shown in FIG. Further, in the fixing member 96 of the outdoor unit 95 of the first modified example, the lengths of the plurality of drain grooves 81c formed in the second fixing piece 68 in the second direction Y are gradually increased toward the first side Y1. It's becoming

Water droplets tend to adhere to the surface of the first header 59 included in the region R1. Due to the formation of the drainage groove 72e, water accumulated above the fixing member 23 flows downward through the drainage groove 72e in the area R1 where water droplets are likely to adhere. Therefore, it is possible to more reliably prevent the first header 59 from being damaged by corrosion.
Also, the longer the length of the drain groove 81c in the second direction Y, the easier it is for water to flow inside. The lengths of the plurality of drainage grooves 81c in the second direction Y are gradually increased toward the first side Y1. By using the drainage groove 81c having a long length in the two directions Y, the water can be easily discharged downward.
In addition, in the outdoor unit 95 of the first modified example, the plurality of drainage grooves 71c and 81c may not be formed.

A fixing member 101 of an outdoor unit 100 of a second modified example shown in FIG. 9 has a first fixing piece 102 and a second fixing piece 103 . The first fixing piece 102 has a first part first arm 106 and a first part second arm 107 instead of the first part first arm 72 and first part second arm 73 of the first fixing piece 67 .
The first part first arm 106 has a first part first body 106a, a first part first small diameter part 106b, and a first part first large diameter part 106c.
The first part first main body 106a has a rectangular parallelepiped shape extending in the third direction Z. As shown in FIG. The first part first main body 106a extends from the upper end of the first main body 71 on the first side Y1 toward the second side Z2.

The lengths in the first direction X of the first portion first small diameter portion 106b and the first portion first large diameter portion 106c are equal to the lengths in the first direction X of the first portion first body 106a. Positions of the first side Y1 end of the first part first body 106a, the first side Y1 end of the first part first small diameter part 106b, and the first side Y1 end of the first part first large diameter part 106c are identical to each other.
The first small-diameter portion 106b protrudes from the first side Y1 portion of the end of the first main body 106a on the second side Z2 toward the second side Z2.

The first portion first large diameter portion 106c protrudes from the first portion first small diameter portion 106b toward the second side Z2. The first portion first large diameter portion 106c protrudes to the second side Y2 more than the first portion first small diameter portion 106b. That is, a step is formed in the second direction Y between the first portion first large diameter portion 106c and the first portion first small diameter portion 106b.
The end face 106c1 on the second side Z2 side of the first large diameter portion 106c is gradually inclined toward the second side Y2 as it goes toward the first side Z1. In other words, the end surface 106c1 is an inclined surface inclined at an acute angle with respect to each of the first side Z1 and the second side Y2.

The first part second arm 107 extends from the upper end of the first main body 71 and the intermediate part in the second direction Y toward the second side Z2. The first part second arm 107 and the first part first arm 106 are spaced apart from each other in the second direction Y. As shown in FIG. The first part second arm 107 is plane-symmetrical with respect to the first part first arm 106 with respect to the first reference plane S1.

The second fixed piece 103 has a second portion first arm 111 and a second portion second arm 112 instead of the second portion first arm 82 and the second portion second arm 83 of the second fixed piece 68 .
The second part first arm 111 has a second part first body 111a, a second part first small diameter part 111b, and a second part first large diameter part 111c.
The second part first main body 111a has a rectangular parallelepiped shape extending in the third direction Z. As shown in FIG. The second part first body 111a is an upper end of the second body 81 and extends from the end of the first side Y1 toward the first side Z1.

The lengths in the first direction X of the second portion first small diameter portion 111b and the second portion first large diameter portion 111c are equal to the lengths in the first direction X of the second portion first main body 111a. Positions of the second side Y2 end of the second part first main body 111a, the second side Y2 end of the second part first small diameter part 111b, and the second side Y2 end of the second part first large diameter part 111c are identical to each other.
The second portion first small diameter portion 111b protrudes toward the first side Z1 from the portion of the second side Y2 at the end of the first side Z1 of the second portion first main body 111a.
The second portion first large diameter portion 111c protrudes toward the first side Z1 from the end of the second portion first small diameter portion 111b on the first side Z1. The second portion first large diameter portion 111c protrudes to the first side Y1 more than the second portion first small diameter portion 111b. That is, a step is formed in the second direction Y between the second portion first large diameter portion 111c and the second portion first small diameter portion 111b.

The second portion second arm 112 extends from the upper end portion of the second body 81 and the middle portion in the second direction Y toward the first side Z1. The second part second arm 112 and the second part first arm 111 are spaced apart from each other in the second direction Y. As shown in FIG. The second part second arm 112 is plane-symmetrical with respect to the second part first arm 111 with respect to the first reference plane S1.
Here, a first reference line L1 located on the second reference plane S2 and at the center between the first main body 71 and the second main body 81 is defined. The second fixed piece 103 is rotationally symmetrical with respect to the first fixed piece 102 with respect to the first reference line L1. That is, the first fixed piece 102 and the second fixed piece 103 have the same shape.
In the outdoor unit 100 of the second modified example configured as described above, the fixed pieces 102 and 103 can be made to have the same shape, so that parts can be shared.

A fixing member 116 of an outdoor unit 115 of a third modified example shown in FIG. 10 includes a first fixing piece 117 instead of the first fixing piece 67 of the fixing member 23 of this embodiment.
In the first fixed piece 117, a holding member 118 made of an elastic member such as rubber is provided at the tip of the second side Z2 of the protrusion formed between the plurality of drainage grooves 71c.
In the outdoor unit 115 of the third modified example configured in this manner, the fixing member 116 can be more securely fixed to the first header 59 .

The shape of the outdoor heat exchanger 21 and the material from which the outdoor heat exchanger 21 is formed are not limited to the materials described above. For example, at least part of the outdoor heat exchanger 21 may be made of copper, a copper alloy, or the like. The headers 44 and 45 are not limited to plate headers, and may be formed of cylindrical tubes or the like.
In the fixing member, the first fixing piece and the second fixing piece may be formed so as to be continuous with each other. That is, the fixing member may be composed of one member.

In the fixing member 23, the first fixing piece 67 may not have the first part second arm 73 and the first part third arm 74. The second fixing piece 68 does not have to have the second arm 83 and the third arm 84 of the second part. The same applies to the fixing members 96 and 101 as well.

According to at least one embodiment described above, the first header 59 and the outdoor housing 20 are fixed to each other by having the fixing member and the drainage groove, and the first header 59 is prevented from being damaged by corrosion. be able to.

Although several embodiments of the invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof.

1... Refrigerating cycle device 12, 115... Outdoor unit (heat exchange unit) 20... Outdoor housing (housing) 21, 95... Outdoor heat exchanger (heat exchanger) 21a... Flat heat exchanger (heat exchanger), 23, 96, 116... fixed member, 59... first header (header), 60... second header (header), 61... heat transfer tube, 67, 102, 117... first fixed piece, 68, 103 ... second fixed piece 71 ... first main body 71b, 71d, 81b ... contact surface 71c, 72e, 81c ... drain groove 72, 106 ... first section first arm 73, 107 ... first section second Arm 81...Second main body 82, 111...Second part first arm 83, 112...Second part second arm X...First direction Y...Second direction Y1, Z1...First side, Z... 3rd direction, Z2... 2nd side

Claims (6)

1. a heat exchanger having a header formed of metal;
   a housing made of a metal having a lower ionization tendency than the header and housing the heat exchanger;
   a fixing member having electrical insulation and fixed to the header and the housing so that the header and the housing are spaced apart from each other;
   with
   A drain groove is formed on a contact surface of the fixing member that contacts the header,
   heat exchange unit.
2. the header is a plate header;
   A heat exchange unit according to claim 1 .
3. the header extends in a first direction;
   The heat exchanger has a heat transfer tube with the header provided at an end thereof and extending in a second direction that intersects with the first direction,
   the contact surface contacts a surface of the header facing either side of a third direction that intersects the first direction and the second direction;
   The drainage groove extends in the first direction,
   The heat exchange unit according to claim 1 or 2.
4. The fixing member is
   a first fixing piece;
   a second fixing piece detachably fitted to the first fixing piece and fixed together with the first fixing piece to the header and the housing, respectively;
   having
   A heat exchange unit according to claim 1 .
5. the header extends in a first direction;
   The heat exchanger has a heat transfer tube with the header provided at an end thereof and extending in a second direction that intersects with the first direction,
   The first fixing piece is
   a first body contacting a surface of the header facing a first side in a third direction intersecting the first direction and the second direction, respectively;
   a first section first arm and a first section second arm extending from the first body in the third direction and sandwiching the header in the second direction;
   has
   The first arm of the first part is arranged on a first side in the second direction in which the heat transfer tube extends from the header, relative to the second arm of the first part,
   The second fixing piece is
   a second body contacting a surface facing a second side opposite the first side in the third direction with respect to the header;
   a second part first arm and a second part second arm extending from the second body in the third direction and sandwiching the header in the second direction;
   has
   the second part first arm is arranged closer to the first side in the second direction than the second part second arm,
   The first arm of the first part is detachably fitted to the first arm of the second part,
   The first part second arm is detachably fitted to the second part second arm,
   A heat exchange unit according to claim 4.
6. A heat exchange unit according to claim 1,
   Refrigeration cycle equipment.

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