CN210625445U

CN210625445U - Heat exchanger

Info

Publication number: CN210625445U
Application number: CN201790000770.3U
Authority: CN
Inventors: 我妻正章
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2017-11-16
Filing date: 2017-11-16
Publication date: 2020-05-26
Anticipated expiration: 2027-11-16
Also published as: JPWO2019097632A1; JP6790289B2; WO2019097632A1

Abstract

The utility model provides a heat exchanger that the corrosion resistance who restraines the curb plate reduces. A heat exchanger (10) is provided with: a plate-like fin (1); a first heat transfer pipe (2B1) including a first end (2D1) and inserted in the fin; a second heat transfer pipe (2B2) including a second end portion (2D2) and inserted in the fin in parallel with the first heat transfer pipe; a side plate (SB) provided at the first end portion and the second end portion, the side plate having a corrosion-resistant layer formed thereon; and an elbow (2C) having one end joined to the first end and the other end joined to the second end, the side plate including a first side plate (3) and a second side plate (4) fixed to the first side plate, the side plate being formed with: a first open part (Op) provided between the first and second side plates, into which the first end part is inserted; a second open part (Op) provided between the first and second side plates for insertion of the second end part.

Description

Heat exchanger

Technical Field

The utility model relates to a possess the heat exchanger who sets up in the curb plate of heat-transfer pipe.

Background

A conventional heat exchanger for an air conditioner has been proposed to include plate-shaped fins, a plurality of heat transfer tubes inserted into the fins, and a side plate having a corrosion-resistant layer formed thereon (see, for example, patent document 1). The side plate of the heat exchanger of patent document 1 has a circular opening into which the heat transfer pipe is inserted. Here, each heat transfer pipe of the heat exchanger of patent document 1 includes: the fin-cooling fin includes a linear first tube portion into which the fin is inserted, a second tube portion into which the fin is inserted and which is parallel to the first tube portion, and a third tube portion which is formed by bending and is connected to the first tube portion and the second tube portion. The first pipe portion and the second pipe portion are joined to a bent pipe formed by bending.

In the process of manufacturing the heat exchanger of patent document 1, after the first process of inserting the heat transfer tubes into the fins, the second process of inserting the heat transfer tubes into the openings of the side plates is performed. In the process of manufacturing the heat exchanger of patent document 1, a third process of joining the heat transfer tubes to the bent tubes is performed after the second process.

Patent document 1: international publication No. 2013/084397

Since the heat exchanger tubes of the side plate of the heat exchanger of patent document 1 have the insertion portions as the opening portions, the third step is performed after the second step. The operator cannot reverse the order of the second step and the third step, that is, cannot perform the third step before the second step. If the operator reverses the order of the second step and the third step, the bent tube interferes with the side plate, and therefore the operator cannot insert the heat transfer tube into the opening of the side plate.

Here, when the third step is performed after the second step as in the process of manufacturing the heat exchanger of patent document 1, the side plate is heated by the flame of the welding torch used in the third step. Whereby the corrosion-resistant layer of the side plate melts to cause a part of the corrosion-resistant layer of the side plate to become thin, possibly causing the corrosion resistance of the side plate to decrease. In addition, there is also a case where the corrosion-resistant layer of the side panel melts to expose an iron member of the side panel, thereby reducing the corrosion resistance of the side panel. That is, the side plate of the heat exchanger of patent document 1 may have a reduced corrosion resistance due to the third step of joining the heat transfer tubes and the bent tubes.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat exchanger and a method of manufacturing the heat exchanger, which can suppress a decrease in corrosion resistance of a side plate.

The utility model discloses a heat exchanger possesses: a plate-like fin; a first heat transfer pipe including a first end and inserted into the fin; a second heat transfer pipe including a second end portion and inserted into the fin, in parallel with the first heat transfer pipe; a side plate provided at the first end portion and the second end portion and formed with a corrosion-resistant layer; and an elbow pipe having one end joined to the first end portion and the other end joined to the second end portion, the heat exchanger being characterized in that the side plate includes: first curb plate and be fixed in the second curb plate of first curb plate, be formed with at the curb plate: a first opening portion provided between the first side plate and the second side plate for insertion of the first end portion; and a second open portion provided between the first side plate and the second side plate for insertion of the second end portion, the first side plate including: a first side plate end portion as one end portion in a longitudinal direction of the first side plate, and a second side plate end portion as the other end portion in the longitudinal direction of the first side plate, the second side plate including: the heat exchanger further includes a third side plate end portion as one end portion in the longitudinal direction of the second side plate, and a fourth side plate end portion as the other end portion in the longitudinal direction of the second side plate, wherein the fixing member fixes the first side plate and the second side plate, the third side plate end portion is fixed to the first side plate end portion, the fourth side plate end portion is fixed to the second side plate end portion, the first side plate end portion is formed with a first hole portion into which the fixing member is inserted, the second side plate end portion is formed with a claw insertion portion having an opening, the third side plate end portion is formed with a second hole portion which overlaps the first hole portion and into which the fixing member is inserted, and the fourth side plate end portion is formed with a claw portion inserted into the claw insertion portion.

Preferably, the first side panel overlaps the second side panel.

Preferably, the first side panel comprises: a first cutout portion into which the first end portion is inserted, and a second cutout portion into which the second end portion is inserted, the second side plate including: a third notch portion into which the first end portion is inserted, and a fourth notch portion into which the second end portion is inserted, wherein the first open portion is formed by the first notch portion and the third notch portion, and the second open portion is formed by the second notch portion and the fourth notch portion.

Preferably, the first heat transfer pipe has a circular cross-sectional shape perpendicular to the tube axis of the first heat transfer pipe, the second heat transfer pipe has a circular cross-sectional shape perpendicular to the tube axis of the second heat transfer pipe, the first cutout portion is along the circumferential surface of the first heat transfer pipe, the second cutout portion is along the circumferential surface of the second heat transfer pipe, the third cutout portion is along the circumferential surface of the first heat transfer pipe, and the fourth cutout portion is along the circumferential surface of the second heat transfer pipe.

According to the utility model discloses a heat exchanger, the curb plate includes: first curb plate and second curb plate as the part with first curb plate components of a whole that can function independently, in addition, be formed with between first curb plate and second curb plate: a first open portion into which the first end portion is inserted; and a second open portion into which the second end portion is inserted. Therefore, after the joining of the first heat transfer pipes and the joining of the second heat transfer pipes, the operator can combine the first side plate and the second side plate to form the first open portion and the second open portion, and can provide the side plates at the first end portions of the first heat transfer pipes and the second end portions of the second heat transfer pipes. Therefore, the flame when the side plate is joined by the first heat transfer pipe and the flame when the second heat transfer pipe is joined can be prevented from heating, and as a result, the corrosion resistance of the side plate of the heat exchanger can be suppressed from lowering.

Drawings

Fig. 1 is an explanatory diagram of a refrigerant circuit of an air conditioner 110 including the heat exchanger 10 of embodiment 1.

Fig. 2 is a schematic diagram of the outdoor unit U1 of the air conditioner 110 and the indoor unit U2 of the air conditioner 110.

Fig. 3 is an overall view of the heat exchanger 10 according to embodiment 1.

Fig. 4(a) is a view of the heat exchanger 10 viewed from the side plate SB shown in fig. 3, and fig. 4(b) is an enlarged view of the section T-T shown in fig. 3.

Fig. 5 is a sectional view taken along line a-a shown in fig. 4(a), and is a sectional view showing a main part such as a side plate SB.

Fig. 6 is a view showing the first side plate 3.

Fig. 7 is a view showing the second side plate 4.

Fig. 8 is a flowchart illustrating a method of manufacturing the heat exchanger 10 according to embodiment 1.

Fig. 9 is an explanatory diagram of an insertion process of inserting the heat transfer tube 2 into the fin 1.

Fig. 10 is a front view showing a state after the end of the insertion process.

Fig. 11 is an explanatory diagram of a joining process including joining of the heat transfer pipe 2 and the elbow pipe 2C, joining of the heat transfer pipe 2 and the refrigerant pipe P1, and joining of the heat transfer pipe 2 and the refrigerant pipe P2.

Fig. 12 is an explanatory diagram of an installation process of the side plates SB to the heat transfer tubes 2.

Fig. 13 is a front view showing a state after the mounting process shown in fig. 12 is completed.

Fig. 14 is a side view showing a state after the mounting step shown in fig. 12 is completed.

Fig. 15 is a sectional view B-B shown in fig. 13, and is a sectional view showing a main part such as the side plate SB.

Fig. 16 is an explanatory diagram of a fixing process of inserting the fixing member 5 into the side plate SB and fixing the first side plate 3 and the second side plate 4.

Fig. 17 is a diagram showing the first side plate 3t1 according to modification 1 of embodiment 1.

Fig. 18 is a diagram showing the second side panel 4t1 according to modification 1 of embodiment 1.

Fig. 19 is a diagram showing a side panel SBt2 according to modification 2 of embodiment 1.

Fig. 20 is a perspective view showing an exploded state of an outdoor unit U20 of an air conditioner including the heat exchanger 20 according to embodiment 2.

Fig. 21 is a view of the outdoor unit U20 from above in a state where the top panel 25 shown in fig. 20 is removed from the outdoor unit U20.

Fig. 22 is a schematic diagram illustrating an internal structure of the outdoor unit U20.

Fig. 23 is a view of the heat exchanger 20 shown in fig. 20 and 21, as viewed from the side plate SB1 side.

Fig. 24 is a view showing the first side plate 30A.

Fig. 25 is a view showing the second side plate 40A.

Fig. 26 is a view showing the first side plate 30B.

Fig. 27 is a view showing the second side plate 40B.

Detailed Description

Embodiment mode 1

Hereinafter, embodiments will be described with reference to the drawings as appropriate. In the following drawings, including fig. 1, the size relationship of each component may be different from the actual state.

< Structure of embodiment 1 >

Fig. 1 is an explanatory diagram of a refrigerant circuit C of an air conditioner 110 including the heat exchanger 10 of embodiment 1. Fig. 2 is a schematic diagram of the outdoor unit U1 of the air conditioner 110 and the indoor unit U2 of the air conditioner 110. The air conditioner 110 includes: an outdoor unit U1 provided with the heat exchanger 10; and an indoor unit U2 provided with a heat exchanger 105. The air conditioner 110 includes a refrigerant circuit C including: a refrigerant pipe P3 through which a two-phase refrigerant in a gas-liquid state flows during heating operation; and a refrigerant pipe P4 through which a liquid refrigerant flows during heating operation. The refrigerant circuit C includes: a compressor 101 that compresses a refrigerant; a four-way valve 102 that switches the flow of the refrigerant; a heat exchanger 105 functioning as a condenser during heating operation; an expansion device 103 that reduces the pressure of the refrigerant; and a heat exchanger 10 functioning as an evaporator during heating operation. Further, the refrigerant circuit C includes: a refrigerant pipe P1 connecting the four-way valve 102 and the heat exchanger 10; and a refrigerant pipe P2 connecting the expansion device 103 and the heat exchanger 10. The compressor 101, the four-way valve 102, the throttle device 103, and the heat exchanger 10 are provided in the outdoor unit U1. The heat exchanger 105 is provided in the indoor unit U2.

The outdoor unit U1 includes an outdoor fan 104 that supplies air to the heat exchanger 10, and the indoor unit U2 includes an indoor fan 106 that supplies air to the heat exchanger 105. The outdoor unit U1 includes a control device Cnt for controlling the compressor 101, the four-way valve 102, the throttle device 103, the outdoor fan 104, and the indoor fan 106. The outdoor unit U1 and the indoor unit U2 are connected to each other via a refrigerant pipe P3 and a refrigerant pipe P4.

Fig. 3 is an overall view of the heat exchanger 10 according to embodiment 1. Fig. 4(a) is a view of the heat exchanger 10 viewed from the side plate SB shown in fig. 3, and fig. 4(b) is an enlarged view of the section T-T shown in fig. 3. Fig. 5 is a sectional view taken along line a-a shown in fig. 4(a), and is a sectional view showing a main part such as a side plate SB. The structure of the heat exchanger 10 will be described with reference to fig. 3 to 5 in addition to fig. 1. The heat exchanger 10 includes: plate-like fins 1; a heat transfer tube 2 inserted into the fin 1; an elbow tube 2C joined to the heat transfer tube 2; a side plate SB provided on the heat transfer pipe 2 and having a corrosion-resistant layer formed thereon; and a fixing member 5 inserted into the side plate SB. The fixing member 5 may be constituted by a screw, or may be constituted by a bolt and a nut. The heat transfer tube 2 includes: a heat transfer pipe 2A formed by bending; a first heat transfer pipe 2B1 that is connected to one end of the heat transfer pipe 2A and inserted into the fin 1; and a second heat transfer pipe 2B2 that is connected to the other end of the heat transfer pipe 2A and is inserted into the fin 1. In the refrigerant circuit C shown in fig. 1, the refrigerant charged into the refrigerant circuit C flows through the tubes of the heat transfer tubes 2 and the tubes of the bend 2C. Therefore, the bent pipe 2C also functions as a heat transfer pipe. The heat exchanger 10 includes: a joint 2C1 provided at a portion where the heat transfer tube 2 and the bent tube 2C are connected; an engagement portion Me1 provided at a portion where the heat transfer pipe 2 is connected to the refrigerant pipe P1; and an engaging portion Me2 provided at a portion where the heat transfer pipe 2 and the refrigerant pipe P2 are coupled. Solder is provided to the joint 2C1, the joint Me1, and the joint Me 2.

As shown in fig. 3, the first heat transfer pipes 2B1 and the second heat transfer pipes 2B2 are pipes extending linearly. The heat transfer pipe 2 is a circular pipe. That is, the cross-sectional shape of the first heat transfer pipe 2B1 that is orthogonal to the tube axes of the first heat transfer pipes 2B1 is circular, and the cross-sectional shape of the second heat transfer pipe 2B2 that is orthogonal to the tube axes of the second heat transfer pipes 2B2 is circular. The first heat transfer pipes 2B1 are arranged in parallel with the second heat transfer pipes 2B 2. As shown in fig. 3 and 5, the first heat transfer pipe 2B1 includes a first end portion 2D1 joined to one end of the bent pipe 2C or the refrigerant pipe P2. The second heat transfer tubes 2B2 include second end portions 2D2 joined to the other end of the bent tube 2C or the refrigerant pipe P2. The first end 2D1 and the second end 2D2 are provided with side plates SB.

The side plate SB includes: a first side plate 3 parallel to the fins 1; and a second side plate 4 fixed to the first side plate 3 and parallel to the fin 1. The first side plate 3 is in contact with the second side plate 4, and the first side plate 3 overlaps the second side plate 4. The first side plate 3 and the second side plate 4 are provided at the first end 2D1 of the first heat transfer pipe 2B1 and the second end 2D2 of the second heat transfer pipe 2B 2. The first end portion 2D1 of the first heat transfer pipe 2B1 and the second end portion 2D2 of the second heat transfer pipe 2B2 are sandwiched by the first side plate 3 and the second side plate 4. The side plates SB are formed with a plurality of open portions Op into which the heat transfer tubes 2 are inserted. The opening part Op is provided between the first side plate 3 and the second side plate 4. The open part Op has a rectangular shape. The first end portion 2D1 passes through the open part Op, and in addition, the second end portion 2D2 passes through the open part Op different from the open part Op through which the first end portion 2D1 passes. The open part Op through which the first end part 2D1 passes among the open parts Op corresponds to a first open part, and the open part Op through which the second end part 2D2 passes among the open parts Op corresponds to a second open part.

The first side plate 3 includes: a steel sheet, and a corrosion-resistant layer formed on a surface of the steel sheet to inhibit corrosion of the steel sheet. The corrosion-resistant layer of the side plate SB is a layer formed by plating a steel plate with molten zinc. That is, the corrosion-resistant layer of the side plate SB is made of zinc. The corrosion-resistant layer of the side plate SB is not limited to zinc. The material of the steel plate of the plated side plate SB can be a metal mixed material including zinc, aluminum, magnesium, and silicon. At this time, the corrosion-resistant layer of the side plate SB is composed of the metal mixed material. The corrosion resistance of the corrosion-resistant layer of the metal mixed material including zinc, aluminum, magnesium, and silicon is higher than that of the corrosion-resistant layer of zinc. In addition, the steel plate of the side plate SB can be made of stainless steel. In the case of using a stainless steel plate as the steel plate of the side plate SB, a non-dynamic protective film as an oxidation protective film is formed on the surface of the steel plate. Therefore, in the case where a stainless steel plate is used as the steel plate of the side plate SB, the corrosion-resistant layer of the side plate SB is constituted by a non-dynamic protective film. The corrosion resistance of the corrosion-resistant layer of the stainless steel plate is higher than that of the corrosion-resistant layer of zinc, and in addition, the corrosion resistance of the corrosion-resistant layer of the stainless steel plate is higher than that of the corrosion-resistant layer of the metal hybrid material including zinc, aluminum, magnesium, and silicon.

Fig. 6 is a view showing the first side plate 3. Fig. 7 is a view showing the second side plate 4. The structure of the first side plate 3 and the structure of the second side plate 4 will be described with reference to fig. 6 and 7 in addition to fig. 3 to 5. The first side plate 3 includes: a first side plate end t1 that is one end in the longitudinal direction Dr1 of the first side plate 3, and a second side plate end t2 that is the other end in the longitudinal direction Dr1 of the first side plate 3. The first side plate 3 is a plate material formed in a comb-tooth shape. Specifically, the first side plate 3 is formed with a plurality of notches 3A into which the heat transfer tubes 2 are inserted. A first hole 3B into which the fixing member 5 is inserted is formed in the first side plate end t 1. The second side plate end t2 has an open claw insertion portion 3C. The second side plate 4 includes: a third side panel end t3 that is one end portion in the longitudinal direction Dr2 of the second side panel 4, and a fourth side panel end t4 that is the other end portion in the longitudinal direction Dr2 of the second side panel 4. The longitudinal direction Dr1 is parallel to the longitudinal direction Dr 2. The second side plate 4 is also a plate material formed in a comb-like shape, similarly to the first side plate 3. Specifically, the second side plate 4 is formed with a plurality of notch portions 4A into which the heat transfer tubes 2 are inserted. The third side plate end t3 is formed with a second hole 4B into which the fixing member 5 is inserted. The fourth side plate end t4 has a claw portion 4C inserted into the claw insertion portion 3C. The second side plate 4 is provided between the first side plate 3 and the fin 1 disposed closest to the second side plate 4 among the plurality of fins 1. Here, the opening part Op shown in fig. 4(a) and 4(b) is formed by combining the cutout part 3A of the first side plate 3 and the cutout part 4A of the second side plate 4. That is, the opening part Op is formed by the cutout part 3A of the first side plate 3 and the cutout part 4A of the second side plate 4. Notch portion 3A into which first end portion 2D1 is inserted corresponds to a first notch portion, and notch portion 4A into which first end portion 2D1 is inserted corresponds to a third notch portion. Further, the notch portion 3A into which the second end portion 2D2 is inserted corresponds to a second notch portion, and the notch portion 4A into which the first end portion 2D1 is inserted corresponds to a fourth notch portion.

As shown in fig. 6 and 4(b), the notch 3A includes: a rim 3a1 that contacts the heat transfer tube 2; a rim 3a2 connected to one end of the rim 3a 1; and a rim portion 3A3 connected to the other end of the rim portion 3a1 and extending parallel to the rim portion 3a 2. As shown in fig. 7 and 4(b), the notch 4A includes: a rim portion 4a1 that contacts the heat transfer tube 2 and extends parallel to the rim portion 3a 1; a rim portion 4a2 connected to one end of the rim portion 4a 1; and a rim portion 4A3 connected to the other end of the rim portion 4a2 and extending parallel to the rim portion 4a 2. As shown in fig. 4(b), in a state where the side plate SB is provided at the first end portion 2D1 and the second end portion 2D2, the first end portion 2D1 and the second end portion 2D2 are sandwiched by the rim portion 3A and the rim portion 4a 1. As a result, the first end 2D1 comes into contact with the rim 3a1 and the rim 4a1, and the second end 2D2 comes into contact with the rim 3a1 and the rim 4a1, whereby the side plate SB is fixed to the heat transfer tube 2.

Further, the first end portion 2D1 may not contact the rim portion 3a2, the rim portion 3A3, the rim portion 4a2, and the rim portion 4A3, but if the first end portion 2D1 contacts the rim portion 3a2, the rim portion 3A3, the rim portion 4a2, and the rim portion 4A3, the side plate SB is more firmly fixed to the heat transfer pipe 2. Further, the second end 2D2 may not contact the rim 3a2, the rim 3A3, the rim 4a2, and the rim 4A3, but if the second end 2D2 contacts the rim 3a2, the rim 3A3, the rim 4a2, and the rim 4A3, the side plate SB is more firmly fixed to the heat transfer pipe 2.

Action of embodiment 1

The operation of the air conditioner 110 will be described with reference to fig. 1 and 2. An arrow AR1 shown in fig. 1 indicates the flow direction of the refrigerant during the heating operation of the air conditioner 110. Arrow AR2 shown in fig. 1 indicates the flow direction of the refrigerant during the cooling operation of the air conditioner 110. During the cooling operation of the air conditioner 110, the refrigerant compressed by the compressor 101 is supplied to the heat exchanger 10 via the four-way valve 102 and the refrigerant pipe P1. Heat is exchanged between air and refrigerant in the heat exchanger 10. Whereby in the heat exchanger 10 the refrigerant condenses. The refrigerant flowing out of the heat exchanger 10 is supplied to the expansion device 103 via the refrigerant pipe P2. The refrigerant is decompressed in the expansion device 103. The refrigerant flowing out of the expansion device 103 is supplied to the heat exchanger 105 through the refrigerant pipe P3. In the heat exchanger 105, heat is exchanged between air and refrigerant. Thereby, the refrigerant is evaporated in the heat exchanger 105. The refrigerant flowing out of the heat exchanger 105 returns to the compressor 101 through the refrigerant pipe P4 and the four-way valve 102. During a heating operation of the air conditioner 110, the refrigerant compressed by the compressor 101 is supplied to the heat exchanger 105 via the four-way valve 102 and the refrigerant pipe P4. In the heat exchanger 105, heat is exchanged between air and refrigerant. Whereby the refrigerant condenses in the heat exchanger 105. The refrigerant flowing out of the heat exchanger 105 is supplied to the expansion device 103 via the refrigerant pipe P3. The refrigerant is decompressed in the expansion device 103. The refrigerant flowing out of the expansion device 103 is supplied to the heat exchanger 10 through the refrigerant pipe P2. Heat is exchanged between air and refrigerant in the heat exchanger 10. Whereby the refrigerant evaporates in the heat exchanger 10. The refrigerant flowing out of the heat exchanger 10 returns to the compressor 101 through the refrigerant pipe P1 and the four-way valve 102.

< method of manufacturing embodiment 1 >

Fig. 8 is a flowchart illustrating a method of manufacturing the heat exchanger 10 according to embodiment 1. The steps of the method for manufacturing the heat exchanger 10 include: a step of manufacturing the fin 1 (step S1), a step of manufacturing the heat transfer tube 2 and the bent tube 2C (step S2), an insertion step of inserting the heat transfer tube 2 into the fin 1 (step S3), and an expansion step of expanding the heat transfer tube 2 and fixing the fin 1 to the heat transfer tube 2 (step S4). The steps of the method for manufacturing the heat exchanger 10 include: a joining step of joining the heat transfer tubes 2 to the bent tube 2C (step S5), an attaching step of sandwiching the heat transfer tubes 2 between the first side plate 3 and the second side plate 4 (step S6), and a fixing step of inserting the fixing members 5 into the first side plate 3 and the second side plate 4 (step S7).

In step S1, the fin 1 having the through-holes into which the heat transfer tubes 2 are inserted is manufactured by pressing a metal plate material. In step S2, the heat transfer pipe 2 including the heat transfer pipe 2A, the first heat transfer pipes 2B1, and the second heat transfer pipes 2B2 is manufactured by bending one straight pipe. The bent pipe 2C is manufactured by bending one straight pipe.

Fig. 9 is an explanatory diagram of an insertion process of inserting the heat transfer tube 2 into the fin 1. Fig. 10 is a front view showing a state after the end of the insertion process. As shown in fig. 9, the heat transfer tube 2 manufactured in step S2 is inserted into the through-hole of the fin 1 manufactured in step S1. As shown in fig. 10, in a state where the heat exchanger tube 2 is inserted into the through-holes of the fins 1, the first end portion 2D1 and the second end portion 2D2 protrude from the fin 1 disposed on the side closest to the second side plate 4 among the plurality of fins 1.

Fig. 11 is an explanatory diagram of a joining process including joining of the heat transfer pipe 2 and the elbow pipe 2C, joining of the heat transfer pipe 2 and the refrigerant pipe P1, and joining of the heat transfer pipe 2 and the refrigerant pipe P2. As shown in fig. 11, the second end 2D2 of the heat transfer pipe 2 and the bent pipe 2C are brazed by using a welding torch TH. Thus, a joint 2C1 is formed at the joint portion of the second end portion 2D2 and the bent pipe 2C. The first end 2D1 of the heat transfer pipe 2 and the bent pipe 2C are brazed by a welding torch TH. A joint 2C1 is thereby formed at the joint portion of the first end portion 2D1 and the bent pipe 2C. The second end 2D2 of the heat transfer pipe 2 and the refrigerant pipe P1 are brazed to each other by using a welding torch TH. Thereby, an engaging portion Me1 is formed at the engaging portion between the second end portion 2D2 of the heat transfer pipe 2 and the refrigerant pipe P1. The first end 2D1 of the heat transfer pipe 2 and the refrigerant pipe P2 are brazed to each other by using a welding torch TH. Thus, an engagement portion Me2 is formed at the engagement portion between the first end portion 2D1 of the heat transfer tube 2 and the refrigerant pipe P2.

Fig. 12 is an explanatory diagram of an installation process of the side plates SB to the heat transfer tubes 2. Fig. 13 is a front view showing a state after the mounting process shown in fig. 12 is completed. Fig. 14 is a side view showing a state after the mounting step shown in fig. 12 is completed. Fig. 15 is a sectional view B-B shown in fig. 13, and is a sectional view showing a main part such as the side plate SB. The first end 2D1 and the second end 2D2 are sandwiched by the first side plate 3 and the second side plate 4. Then, the claw portion 4C of the second side plate 4 is inserted into the claw insertion portion 3C of the first side plate 3 with the first end portion 2D1 and the second end portion 2D2 sandwiched between the first side plate 3 and the second side plate 4. Whereby the second side panel end t2 of the first side panel 3 and the fourth side panel end t4 of the second side panel 4 are fixed. As shown in fig. 15, in a state after the end of the mounting process, the first hole 3B of the first side plate 3 and the second hole 4B of the second side plate 4 are aligned in a direction orthogonal to the first side plate 3. That is, in a state after the end of the mounting process, the first hole portion 3B of the first side plate 3 and the second hole portion 4B of the second side plate 4 communicate with each other.

Fig. 16 is an explanatory diagram of a fixing process of inserting the fixing member 5 into the side plate SB and fixing the first side plate 3 and the second side plate 4. The fixing member 5 is inserted into the first hole 3B and the second hole 4B. Whereby the first side plate end t1 of the first side plate 3 and the third side plate end t3 of the second side plate 4 are fixed.

< Effect of embodiment 1 >

The side plate SB includes a first side plate 3 and a second side plate 4 as a member separate from the first side plate 3. An open portion Op into which the heat transfer tubes 2 are inserted is formed between the first side plate 3 and the second side plate 4. Therefore, after the heat transfer tubes 2 are joined, the worker can combine the first side plate 3 and the second side plate 4 to form the open portions Op and can provide the side plates SB to the heat transfer tubes 2. That is, the worker does not need to provide the side plates SB to the heat transfer tubes 2 before joining the heat transfer tubes 2. Therefore, the side plate SB can be prevented from being heated by the flame of the welding torch TH when the heat transfer pipe 2 is joined, and as a result, the corrosion-resistant layer on the surface of the side plate SB can be prevented from being melted by the flame of the welding torch TH. That is, it is possible to avoid the corrosion-resistant layer of the steel plate formed on the side plate SB from melting to become thin, and the corrosion-resistant layer of the steel plate formed on the side plate SB from melting to expose the steel plate. Therefore, the decrease in corrosion resistance of the side plate SB of the heat exchanger 10 of embodiment 1 is suppressed.

The first side panel 3 overlaps the second side panel 4. That is, the first side plate 3 and the second side plate 4 are fixed in a state where the first side plate 3 and the second side plate 4 overlap. Therefore, the thickness of the side plate SB increases at the portion where the first side plate 3 overlaps the second side plate 4. Therefore, the rigidity of the side plate SB is increased at the portion where the first side plate 3 and the second side plate 4 overlap.

The third side panel end t3 of the second side panel 4 is secured to the first side panel end t1 of the first side panel 3 and the fourth side panel end t4 of the second side panel 4 is secured to the second side panel end t2 of the first side panel 3. That is, the end portions of the side plates SB in the longitudinal direction serve as fixing portions of the first side plate 3 and the second side plate 4. Consider a case where, for example, the center portion in the longitudinal direction of the side plate SB is a fixed portion between the first side plate 3 and the second side plate 4. In this case, for example, when a force is applied to the first side plate end t1 in a direction away from the third side plate end t3, the moment of the force around the fixing portion becomes larger by an amount corresponding to the distance separating the first side plate end t1 from the fixing portion. The first side plate 3 is therefore easily deformed when a force is applied to the first side plate end t1 in a direction away from the third side plate end t 3. Similarly, the first side panel 3 is easily deformed when a force is applied to the second side panel end t2 in a direction away from the fourth side panel end t4 with respect to the second side panel end t 2. The same applies to the third side plate end t3 and the fourth side plate end t 4. That is, the second side panel 4 is easily deformed when a force is applied to the third side panel end t3 in a direction away from the first side panel end t1, and the second side panel 4 is easily deformed when a force is applied to the fourth side panel end t4 in a direction away from the second side panel end t 2. However, in embodiment 1, the end portion of the side plate SB in the longitudinal direction is a fixed portion between the first side plate 3 and the second side plate 4. Therefore, the side plate SB can suppress the moment of force around the fixing portion from becoming large, and the side plate SB is difficult to deform.

The third side panel end t3 of the second side panel 4 is secured to the first side panel end t1 of the first side panel 3 and the fourth side panel end t4 of the second side panel 4 is secured to the second side panel end t2 of the first side panel 3. That is, the side plate SB is provided with a plurality of fixing portions of the first side plate 3 and the second side plate 4. Therefore, it is possible to prevent the second side plate 4 from rotating relative to the first side plate 3 and causing a positional deviation of the second side plate 4. Conversely, the position offset of the first side plate 3 caused by the rotation of the first side plate 3 relative to the second side plate 4 can be avoided.

The heat exchanger 10 includes the fixing member 5 for fixing the first side plate 3 and the second side plate 4, and thus the side plates SB can firmly fix the first side plate 3 and the second side plate 4. Further, a pawl insertion portion 3C is formed at the first side plate end t1 of the first side plate 3, and a pawl portion 4C is formed at the fourth side plate end t4 of the second side plate 4. Therefore, the worker can assemble the first side plate 3 and the second side plate 4 by inserting the claw portion 4C into the claw insertion portion 3C. That is, even if the operator does not perform troublesome work such as inserting screws into the first side plate 3 and the second side plate 4, the operator can combine the first side plate 3 and the second side plate 4. This can suppress the workload when the first side plate 3 and the second side plate 4 are combined.

The first side plate 3 includes a cutout portion 3A, the second side plate 4 includes a cutout portion 4A, and the open portion Op is formed by the cutout portion 3A and the cutout portion 4A. That is, the worker can install the side plate SB in the heat transfer pipe 2 by combining the first side plate 3 and the second side plate 4. Here, the work of combining the first side plate 3 and the second side plate 4 can be performed by the worker inserting the notch portion 3A of the first side plate 3 into the heat transfer tube 2 and the worker inserting the notch portion 4A of the second side plate 4 into the heat transfer tube 2. The work of inserting the notch portion 3A of the first side plate 3 into the heat transfer tube 2 by the operator and the work of inserting the notch portion 4A of the second side plate 4 into the heat transfer tube 2 by the operator can be performed after the heat transfer tube 2 and the bent tube 2C are joined. This is because, as shown in fig. 12, the worker can insert the notch portion 3A of the first side plate 3 into the heat transfer pipe 2 and can insert the notch portion 4A of the second side plate 4 into the heat transfer pipe 2. Therefore, even after the heat transfer tubes 2 and the bent tubes 2C are joined, the operator can combine the first side plate 3 and the second side plate 4. This can prevent the side plate SB from being heated by the flame of the torch TH when the heat transfer pipe 2 is joined, and as a result, the corrosion-resistant layer on the surface of the side plate SB can be prevented from being melted by the flame of the torch. Therefore, the decrease in corrosion resistance of the side plates SB of the heat exchanger 10 can be suppressed.

In embodiment 1, the heat exchanger 10 is provided with the fixing member 5, but is not limited to this configuration. The first side plate 3 and the second side plate 4 may be fixed with an adhesive. The material cost of the heat exchanger 10 can thereby be reduced by the amount of the heat exchanger 10 without the fixing member 5.

Fig. 17 is a diagram showing the first side plate 3t1 according to modification 1 of embodiment 1. Fig. 18 is a diagram showing the second side panel 4t1 according to modification 1 of embodiment 1. The cutout portion 3At of the first side plate 3t1 has a rim portion 3At1, and the rim portion 3At1 has an arc shape along the circumferential surface of the heat transfer pipe which is a circular pipe. The notch portion 4At of the second side plate 4t1 has a rim portion 4At1, and the rim portion 4At1 is formed in an arc shape along the circumferential surface of the heat transfer pipe as a circular tube. Since both the rim portion 3At1 and the rim portion 4At1 have an arc shape, the shape of the rim portion 3At1 combined with the rim portion 4At1, that is, the shape of the open portion, has a circular shape.

In modification 1, the edge portion 3At1 of the notch portion 3At is along the circumferential surface of the heat transfer pipe as a circular tube, and the edge portion 4At1 of the notch portion 4At is also along the circumferential surface of the heat transfer pipe as a circular tube. As a result, the shape of the rim 3At1 combined with the rim 4At1, that is, the shape of the open portion, is circular. Therefore, in a cross section orthogonal to the tube axis of the heat transfer tube 2, when the tube axis of the heat transfer tube 2 is set to the center of the heat transfer tube 2, the heat transfer tube 2 contacts the range in which the center angle of the open portion extends over the center of the heat transfer tube 2 is 360 degrees. That is, the structure of modification 1 can increase the contact area between the heat transfer pipe 2 and the open portion. This makes the fixation of the first side plates 3t1 to the heat transfer tubes 2 and the fixation of the second side plates 4t1 to the heat transfer tubes 2 stronger.

Fig. 19 is a diagram showing a side panel SBt2 according to modification 2 of embodiment 1. In embodiment 1, the pawl insertion portion 3C is formed at the second side plate end t2 of the first side plate 3, and the pawl portion 4C is formed at the fourth side plate end t4 of the second side plate 4. As shown in fig. 19, a hole 3Bt2 into which the fixing member 5B is inserted may be formed in the second side plate end t2, and a hole 4Bt2 into which the fixing member 5B is inserted may be formed in the fourth side plate end t 4.

The configuration of modification 2 includes a fixing member 5B for fixing the first side plate 3 and the second side plate 4 in addition to the fixing member 5 for fixing the first side plate 3 and the second side plate 4. Thereby, the fixation of the first side plate 3 and the second side plate 4 becomes more firm.

Embodiment 2.

In embodiment 2, the same reference numerals are given to the same portions as those in embodiment 1, and the description thereof is omitted, and the differences from embodiment 1 will be mainly described. While the heat exchanger 10 of embodiment 1 has a one-row configuration, the heat exchanger 20 of embodiment 2 has a two-row configuration.

< Structure of embodiment 2 >

Fig. 20 is a perspective view showing an exploded state of an outdoor unit U20 of an air conditioner including the heat exchanger 20 according to embodiment 2. Fig. 21 is a view of the outdoor unit U20 from above in a state where the top panel 25 shown in fig. 20 is removed from the outdoor unit U20. Fig. 22 is a schematic diagram illustrating an internal structure of the outdoor unit U20. The outdoor unit U20 includes a compressor 101, a four-way valve 102, and an outdoor fan 104. The outdoor unit U20 includes a partition plate 26, and the partition plate 26 partitions a blower chamber SP1 in which the outdoor blower 104 and the like are installed and a machine chamber SP2 in which the compressor 101 and the like are installed. As shown in fig. 22, the outdoor unit U20 includes: a side plate SB1 fixed to the fixed end 26A of the partition plate 26; and a side panel SB2 provided side by side with the side panel SB 1. The outdoor unit U20 includes: a heat exchanger 20 including a heat exchanger 20A and a heat exchanger 20B; a base plate 21 on which the heat exchanger 20 is mounted; a front panel 22 constituting an outer contour of a front surface of the outdoor unit U20; and a side panel 22B integrally formed with the front panel 22. The bottom plate 21 includes leg portions 21A for supporting the outdoor unit U20. The front surface panel 22 includes: an opening 22a1 through which air having passed through the heat exchanger 20 and the outdoor fan 104 flows; and a grill 22A2 provided in the opening 22A 1.

The outdoor unit U20 includes: a side panel 22B facing the machine room SP 2; a valve 28 connected to the refrigerant pipe; a cover 24 that houses a valve 28; and an upper surface panel 25 which constitutes an outer contour of an upper surface of the outdoor unit U20. The outdoor unit U20 further includes: a blower support 29 provided in the heat exchanger 20 and supporting the outdoor blower 104; and an electrical box 27 provided with control means.

The heat exchanger 20A is disposed on the downstream side in the air flow direction from the heat exchanger 20B. The components of the heat exchanger 20A and the components of the heat exchanger 20B have the same components as those of the heat exchanger 10 described in embodiment 1. That is, the heat exchanger 20A includes the fins 1 and the heat transfer tubes 2 inserted into the fins 1, and the heat exchanger 20B includes the fins 1 and the heat transfer tubes 2 inserted into the fins 1. The structure of the heat exchanger 20 is different from that of the heat exchanger 10 in that the structure of the heat exchanger 20 includes the bent portion 20R. Side plate SB1 is provided in heat exchanger 20A. Side plate SB2 is provided in heat exchanger 20B.

Fig. 24 is a view showing the first side plate 30A. Fig. 25 is a view showing the second side plate 40A. Fig. 26 is a view showing the first side plate 30B. Fig. 27 is a view showing the second side plate 40B. The structure of the side panel SB1 and the structure of the side panel SB2 will be described with reference to fig. 23 to 27 in addition to fig. 22.

As shown in fig. 23, the side plate SB1 and the side plate SB2 are coupled by a coupling member Lk1 and a coupling member Lk 2. The coupling members Lk1 and Lk2 may be formed of a plate material, a screw, or the like. The side panel SB1 includes a first side panel 30A and a second side panel 40A overlapping the first side panel 30A. As shown in fig. 24, the first side plate 30A includes: a first plate-like portion 30a1 in which a plurality of cutout portions 31A are formed; and a second plate-like portion 30a2 coupled to the first plate-like portion 30a 1. The first plate-like portion 30a1 includes: a hole portion 31B into which the fixing member 5 is inserted, and a claw insertion portion 31C as an opening. As shown in fig. 25, the second side plate 40A includes: a plurality of cut portions 41A; a hole portion 41B into which the fixing member 5 is inserted; and a pawl portion 41C inserted into the pawl insertion portion 31C of the first side plate 30A.

As shown in fig. 23, the side panel SB2 includes: a first side panel 30B, and a second side panel 40B overlapping the first side panel 30B. As shown in fig. 26, the first side plate 30B is formed with: a plurality of cut portions 31A; a hole portion 31B into which the fixing member 5 is inserted; and a claw insertion portion 31C as an opening. As shown in fig. 27, the second side plate 40B includes: a plurality of cut portions 41A; a hole portion 41B into which the fixing member 5 is inserted; and a pawl portion 41C inserted into the pawl insertion portion 31C of the first side plate 30B.

< Effect of embodiment 2 >

Embodiment 2 has the same effects as those described in embodiment 1.

Description of reference numerals: 1 … fin; 2 … heat transfer tubes; 2a … heat transfer tubes; 2B1 … heat transfer tubes; 2B2 … heat transfer tubes; 2C … elbow; a 2C1 … joint; 2D1 … end; 2D2 … end; 3 … a first side panel; 3a … cut-out; 3a1 … edge; 3a2 … edge; 3a3 … edge; 3At … cut-out; 3At1 … edge; 3B … first aperture portion; 3Bt2 … pore section; a 3C … jaw insertion; 3t1 … first side panel; 4 … second side panel; 4a … cut-out; 4a1 … edge; 4a2 … edge; 4a3 … edge; 4At … cut-out; 4At1 … edge; 4B … second aperture portion; 4Bt2 … pore section; 4C … claw portion; 4t1 … second side panel; 5 … fixing part; 5B … securing member; 10 … heat exchanger; 20 … heat exchanger; 20a … heat exchanger; 20B … heat exchanger; a 20R … bend; 21 … a bottom panel; 21a … leg; 22 … front surface panel; 22a1 … opening; 22a2 … grid; 22B … side panels; 24 … cover; 25 … an upper surface panel; 26 … a divider plate; 26a … securing the ends; 27 … electrical box; a 28 … valve; 29 … blower support; 30a … first side panel; 30a1 … first plate-like portion; 30a2 … second plate-like portion; 30B … side panels; 31a … cut-out; 31B … pore section; 31C … jaw insertion; 40a … second side panel; 40B … second side panel; 41A … cut-out; 41B … orifice portion; a 41C … claw portion; 101 … compressor; 102, a four-way valve; 103 … throttling means; 104 … outdoor blower; 105 … heat exchanger; 106 … indoor blower; 110 … air conditioning unit; a C … refrigerant circuit; cnt … control device; a Me1 … joint; a Me2 … joint; op … open part; a P1 … refrigerant pipe; a P2 … refrigerant pipe; a P3 … refrigerant pipe; a P4 … refrigerant pipe; SB … side panels; SB1 … side panels; SB2 … side panels; SBt2 … side panels; SP1 … blower chamber; SP2 … machine room; a TH … torch; u1 … outdoor unit; u2 … indoor unit; u20 … outdoor unit; t1 … first side panel end; t2 … second side panel end; t3 … third side panel end; t4 … fourth side panel end; lk1 … connecting member; lk2 … links the components.

Claims

1. A heat exchanger is provided with:

a plate-like fin;

a first heat transfer pipe including a first end and inserted into the fin;

a second heat transfer pipe including a second end portion and inserted into the fin in parallel with the first heat transfer pipe;

a side plate provided at the first end portion and the second end portion and formed with a corrosion-resistant layer; and

an elbow having one end joined to the first end and another end joined to the second end,

the heat exchanger is characterized in that it is provided with,

the side plate includes: a first side plate and a second side plate fixed on the first side plate,

the side plate is provided with: a first open portion provided between the first side plate and the second side plate, into which the first end portion is inserted; and a second open portion provided between the first side plate and the second side plate for the second end portion to be inserted,

the first side panel includes: a first side plate end portion that is one end portion in a longitudinal direction of the first side plate, and a second side plate end portion that is the other end portion in the longitudinal direction of the first side plate,

the second side plate includes: a third side plate end portion which is one end portion in the longitudinal direction of the second side plate, and a fourth side plate end portion which is the other end portion in the longitudinal direction of the second side plate,

the heat exchanger further includes a fixing member that fixes the first side plate and the second side plate,

the third side panel end is secured to the first side panel end,

the fourth side plate end is fixed to the second side plate end,

a first hole portion into which the fixing member is inserted is formed at an end of the first side plate,

a claw insertion portion having an opening is formed at an end portion of the second side plate,

a second hole portion, which overlaps the first hole portion and into which the fixing member is inserted, is formed at an end portion of the third side plate,

a claw portion inserted into the claw insertion portion is formed at an end portion of the fourth side plate.

2. The heat exchanger of claim 1,

the first side panel overlaps the second side panel.

3. The heat exchanger according to claim 1 or 2,

the first side panel includes: a first notch portion into which the first end portion is inserted, and a second notch portion into which the second end portion is inserted,

the second side plate includes: a third cutout portion into which the first end portion is inserted, and a fourth cutout portion into which the second end portion is inserted,

the first open portion is formed by the first notch portion and the third notch portion,

the second open portion is formed by the second notch portion and the fourth notch portion.

4. The heat exchanger of claim 3,

the cross-sectional shape of the first heat transfer pipe orthogonal to the pipe axis of the first heat transfer pipe is circular,

the cross-sectional shape of the second heat transfer pipe orthogonal to the pipe axis of the second heat transfer pipe is circular,

the first cutout portion is along a circumferential surface of the first heat transfer pipe,

the second cutout portion is along a circumferential surface of the second heat transfer pipe,

the third cutout portion is along the circumferential surface of the first heat transfer pipe,

the fourth notch portion is along the circumferential surface of the second heat transfer pipe.