JP2022035141A - Receiver tank for heat exchanger - Google Patents

Abstract

To easily and surely seal a joint of a lower tank brazed to a header pipe of a heat exchanger and an upper tank for housing a desiccant agent, and to easily and surely fix the upper tank.SOLUTION: A receiver tank for a heat exchanger, joined to a heat exchanger including a pair of header pipes and a plurality of heat exchange tubes, includes: a cylindrical upper tank 11 housing a desiccant agent 20, closed at an upper, and opened at a lower end; and a cylindrical aluminum lower tank 12 housing a filter 30, joined to the header pipe 2b, opened at an upper end, and closed at a lower end. A lower end portion of the upper tank is inserted to an upper end opening portion in a state of disposing an O-ring 40 in an annular groove 12c formed on an inner peripheral surface of an upper end portion 12b of the lower tank, the upper tank and the lower tank are integrated by radially compressing the O-ring, and the upper end portion of the upper tank is fixed by a fixing bolt 70 engaged with a bracket 60 joined to the header pipe.SELECTED DRAWING: Figure 1

Description

The present invention relates to a heat exchanger receiver tank, and more particularly to a heat exchanger receiver tank incorporated in an air conditioner installed in, for example, an automobile or a house.

Conventionally, a parallel flow type having a pair of header pipes, each made of aluminum (including an aluminum alloy), and a plurality of heat exchange tubes erected in parallel with each other between the header pipes, particularly having an overcooling section. The heat exchanger is equipped with a receiver tank for separating the refrigerant into gas and liquid and storing excess refrigerant. This receiver tank is usually enclosed with a filter for removing impurities in the refrigerant circuit and a desiccant for removing water in the refrigerant circuit.

As a conventional structure of this type of heat exchanger with a receiver tank, a receiver tank having a two-divided structure of an upper part and a lower part is known (see, for example, Patent Documents 1 and 2).

The receiver tank described in Patent Document 1 is divided into a head portion made of synthetic resin and a bottom portion made of synthetic resin, and the head portion and the bottom portion are joined by welding (welding). Further, the receiver tank is connected to the heat exchanger via a pipe.

The heat exchanger described in Patent Document 2 has a receiver tank fitted to a lower tank portion connected to a header pipe via a bracket and a pipe, and the upper portion of the receiver tank is fixed by a protrusion portion on the upper portion of the receiver tank. Is inserted (fitted) into the hole of the bracket attached to the header pipe.

Japanese Unexamined Patent Publication No. 61-62771 Japanese Patent No. 11-351780

However, in the receiver tank of Patent Document 1, since the head portion and the bottom portion are joined by welding (welding), it is difficult to control the joining conditions such as welding (welding) temperature and time. Further, since the temperature of the tank becomes high during welding (welding), a bagging type using polyethylene-terephthalate (PET) as a bag material cannot be used as a desiccant to be stored inside. Further, since the receiver tank and the heat exchanger are connected by pipes to form a cold heat cycle, the circuit configuration is troublesome and there is a risk of refrigerant leakage at the connection portion.

On the other hand, in the heat exchanger described in Patent Document 2, since the receiver tank is fitted to the lower tank portion connected to the header pipe via the bracket and the pipe, it is joined as compared with the receiver tank described in Patent Document 1. The conditions are easy to manage. However, the dimensional accuracy of inserting and fixing the protrusion on the upper part of the receiver tank located above into the hole of the bracket attached to the header pipe is strict, and in order to secure the fixing, the clearance between the protrusion and the hole is required. I want to make it smaller, but the insertability is reduced. On the contrary, if the insertability is prioritized, there is an antinomy problem that the fixing becomes uncertain.

Further, in the heat exchanger described in Patent Document 2, since the lower end portion of the receiver tank is inserted into the upper end opening of the lower tank and fitted, there is a concern about corrosion due to the liquid infiltrating from the upper end opening of the lower tank portion. There is.

The present invention has been made in view of the above circumstances, and can easily and surely seal the connection between the lower tank brazed to the header pipe of the heat exchanger and the upper tank containing the desiccant. Another object of the present invention is to provide a receiver tank for a heat exchanger in which the upper tank can be easily and securely fixed.

To accomplish the above task, the present invention relates to said header pipes in a heat exchanger comprising a pair of header pipes, each made of aluminum, and a plurality of heat exchange tubes erected in parallel with each other between the header pipes. A receiver tank for a heat exchanger that is joined to one side via an inflow path and an outflow path of the refrigerant, and has a tubular shape with an upper end closed and a lower end open, which accommodates a desiccant for removing water from the refrigerant. It has a tank inlet and a tank outlet that accommodate the upper tank and a filter that removes impurities in the refrigerant, and are brazed to and joined to the header pipe to communicate with the inflow path and the outflow path of the refrigerant. A tubular aluminum lower tank with an open upper end and a closed lower end is provided, the lower tank is provided with an annular groove on the inner peripheral surface of the upper end opening, and an annular seal is provided in the annular groove. With the member arranged, the lower end of the upper tank is inserted into the upper end opening, the annular seal member is compressed in the radial direction, and the upper tank and the lower tank are integrated, and the upper tank is integrated. The upper end portion is fixed by a fixing member that projects outward from the upper side in the vertical direction of the header pipe and engages with a brazed and joined bracket (claim 1).

With this configuration, the lower tank and bracket are brazed to the header pipe of the heat exchanger in advance, and the annular seal member arranged in the annular groove on the inner peripheral surface of the upper end opening of the lower tank is radially connected. The upper tank and the lower tank can be integrated by compressing to, and the upper part of the upper tank can be fixed by the fixing member engaged with the bracket.

In the present invention, it is preferable that the lower tank has a constant wall thickness including the annular groove in the lower tank (claim 2). In this case, the wall thickness including the annular groove of the lower tank can be made constant by forming the annular groove by plastic working.

With this configuration, the strength of the annular groove portion for arranging the annular seal member that is compressed in the radial direction when the upper tank and the lower tank are connected can be maintained, so that when the internal pressure rises, the annular groove portion can be maintained. It is possible to prevent leakage from occurring due to deformation.

Further, in the present invention, the upper tank and the lower tank are formed to have substantially the same diameter, and in the lower tank, the upper end opening is expanded in diameter and the annular groove is formed on the enlarged inner peripheral surface. It is preferable that it is (Claim 3).

With this configuration, the parts other than the connection portion between the upper tank and the lower tank can have the same diameter, so that the upper tank and the lower tank can be arranged with a constant distance from the header pipe. ..

Further, in the present invention, the upper tank is formed of a synthetic resin member or an aluminum member, and in this case, the fixing member is screwed into a screw hole provided in the bracket and the upper end of the upper tank is inserted. It is preferably formed by a fixing bolt that presses and fixes the portion (claim 4).

With this configuration, with the lower end of the upper tank inserted into the upper end opening of the lower tank, the fixing bolt can be screwed into the screw hole of the bracket to press and fix the upper part of the upper tank. When the upper tank is made of a synthetic resin member, the weight of the receiver tank can be reduced and the condensed refrigerant in the receiver tank can be prevented from re-evaporating due to heat transfer from the header pipe. .. Even when the upper tank is made of aluminum, the upper tank is fixed by the fixing bolts screwed into the screw holes of the bracket, so heat transfer from the header pipe is reduced and the inside of the receiver tank is reduced. It is possible to prevent the condensed refrigerant from re-evaporating.

Further, in the present invention, when the upper tank is made of an aluminum member, the fixing member has an adhered portion to be adhered to the bracket with the protruding portion of the bracket inserted and the adhered portion. It is preferable that the member is made of a synthetic resin having a heat insulating property, which is vertically provided on the lower surface of the portion and integrally formed with a fixed leg portion that presses and fixes the upper end portion of the upper tank (claim). 5).

With this configuration, with the lower end of the upper tank inserted into the upper end opening of the lower tank, the adhered portion of the fixing member is fitted into the protruding portion of the bracket from the outside, and the fixed leg portion is inserted. The upper tank can be fixed by pressing against the upper end of the upper tank. Since the fixing member is made of a synthetic resin member having heat insulating properties, it is possible to prevent the condensed refrigerant in the receiver tank from re-evaporating due to heat transfer from the header pipe.

Further, in the present invention, when the upper tank is made of an aluminum member, the fixing member is provided on the bracket by a fixing cap attached to the top of the upper tank and protruding from the fixing cap. It is preferably formed of a synthetic rubber member having heat insulating properties and flexibility, which is integrally formed with a protrusion to be inserted into the vertical through hole (claim 6).

With this configuration, with the lower end of the upper tank inserted into the upper end opening of the lower tank, the protrusion of the fixing member is elastically deformed and inserted into the through hole of the bracket, and the fixing cap is inserted into the upper tank. The upper tank can be fixed by attaching to the upper part of the. Since the fixing member is made of a synthetic rubber member having heat insulating properties, it is possible to prevent the condensed refrigerant in the receiver tank from re-evaporating due to heat transfer from the header pipe.

According to the present invention, since it is configured as described above, the following effects can be obtained.

(1) According to the inventions according to claims 1, 4 to 6, the annular groove arranged in the annular groove on the inner peripheral surface of the upper end opening of the lower tank which is brazed and joined in advance to the header pipe of the heat exchanger. The heat exchanger header by compressing the sealing member radially to integrate the upper and lower tanks and fixing the upper part of the upper tank with a fixing member that engages the bracket brazed to the header pipe. The joint between the lower tank brazed to the pipe and the upper tank containing the desiccant can be easily and surely sealed, and the upper tank can be easily and securely fixed. Therefore, it is possible to prevent liquid from entering through the upper end opening of the lower tank, and it is possible to improve the corrosion resistance.

(2) According to the second aspect of the present invention, the strength of the annular groove portion for arranging the annular seal member to be compressed in the radial direction when the upper tank and the lower tank are connected can be maintained, so that the internal pressure rises. It is possible to prevent leakage from occurring due to deformation of the annular groove portion. Therefore, in addition to the above (1), the joint between the upper tank and the lower tank can be further strengthened.

(3) According to the third aspect of the present invention, in addition to the above (1) and (2), a portion other than the connection portion between the upper tank and the lower tank can be made to have the same diameter, so that the header pipe can be used. The upper tank and the lower tank can be arranged at a constant distance from the above tank.

It is a schematic front view which shows a part of the use state of the 1st Embodiment of the heat exchanger receiver tank which concerns on this invention in the cross section. It is a schematic front view which shows a part of the use state of the modification of 1st Embodiment in the cross section. It is sectional drawing which shows the joint state of the header pipe, the connecting member, the upper tank and the lower tank in this invention. It is an exploded perspective view which shows an example of a header pipe and a connecting member in this invention. It is a front view (a), a plan view (b) and a bottom view (c) of a filter in this invention. It is sectional drawing which shows the state before joining of the upper tank and the lower tank in this invention. It is an exploded perspective view which shows the state before fixing of the upper tank in 1st Embodiment. It is a perspective view which shows the fixed state of the upper tank. It is a perspective view which shows the fixed state of the upper tank of the modification of 1st Embodiment. A schematic cross-sectional view (a) showing a state before joining the upper tank to the lower tank joined to the header pipe in the present invention and a schematic cross-sectional view (b) showing a state before fixing the upper tank and fixing it with bolts. be. It is a schematic front view which shows the part of the use state of the 2nd Embodiment of the heat exchanger receiver tank which concerns on this invention in the cross section. It is an exploded perspective view which shows the state before fixing of the upper tank in 2nd Embodiment. It is a perspective view which shows the fixed state of the upper tank in 2nd Embodiment. It is a schematic front view which shows the part of the use state of the 3rd Embodiment of the heat exchanger receiver tank which concerns on this invention in the cross section. It is an exploded perspective view which shows the state before fixing of the upper tank in 3rd Embodiment. It is a perspective view which shows the fixed state of the upper tank in 3rd Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

<First Embodiment>
As shown in FIGS. 1 and 2, the heat exchanger 1 according to the present invention has a pair of substantially cylindrical header pipes 2a and 2b, each made of aluminum, and each other installed between the header pipes 2a and 2b. A heat exchanger body 1A including a plurality of parallel heat exchange tubes 3 and corrugated fins 4 interposed between adjacent heat exchange tubes 3, and a refrigerant in one of the header pipes 2a and 2b, the header pipe 2b. A receiver tank 10 including a lower tank 12 joined by brazing through an inflow path and an outflow path and an upper tank 11 joined to the lower tank 12 is provided. The upper end of the upper tank 11 is fixed by a fixing member 70 described later that engages with the bracket 60 brazed and joined to the header pipe 2b.

The header pipes 2a and 2b are formed in a substantially cylindrical shape with, for example, an extruded aluminum profile, and a cap member 2c is adhered and fixed to the upper and lower ends thereof. Further, for example, the refrigerant inflow pipe 6a is connected to the vicinity of the outer upper end of one of the header pipes 2a (left side in FIG. 1), and the refrigerant outflow pipe 6b is connected to the vicinity of the outer lower end. ..

Further, as shown in FIG. 2, on the side wall of the header pipe 2b, a refrigerant outlet 7 and a refrigerant inlet 8 are provided at two upper and lower locations in order to communicate with the receiver tank 10, and these refrigerants are provided. The lower tank 12 is integrally brazed to the header pipe 2b via the inflow path and the outflow path of the refrigerant so as to communicate with the outflow port 7 and the refrigerant inflow port 8.

A partition plate 2d that separates the refrigerant outlet 7 side and the refrigerant inlet 8 side is provided on the lower side of the header pipe 2b, and is provided at the same position as the partition plate 2d on the lower side of the other header pipe 2a. A supercooled portion (supercooled region) is formed by the heat exchange tube 3 on the lower stage side partitioned by the partition plate 2e. The header pipe 2b is provided with a partition plate 2f that separates the upper end side of the header pipe 2b from the refrigerant outlet 7 side, and the header pipe 2a is located above the partition plate 2f and is located on the refrigerant inflow pipe 6a side. A partition plate 2g that separates the partition plate 2e from the partition plate 2e is provided.

Further, the heat exchange tube 3 is made of an extruded aluminum material, for example, in the shape of a flat plate, and inside the heat exchange tube 3, a plurality of divided flow paths of the refrigerant penetrating in the longitudinal direction (shown). Is formed. Both ends of the heat exchange tube 3 thus formed are inserted and fixed to a plurality of slits (not shown) arranged in parallel with each other at appropriate intervals on the opposite sides of the side surfaces of both header pipes 2a and 2b. Has been done.

As shown in FIG. 1, the corrugated fin 4 is formed in a continuous wave shape by bending an aluminum plate, and is brazed by being interposed between the heat exchange tubes 3. In this case, corrugated fins 4 are also brazed and joined to the outer side of the heat exchange tubes 3 arranged at the uppermost stage and the lowermost stage, and both corrugated fins 4 are bonded in order to protect both corrugated fins 4. A side plate 5 is brazed and joined to the outer side of the surface.

The receiver tank 10 contains a tubular upper tank 11 made of synthetic resin whose upper end is closed and whose lower end is open, which houses a desiccant in a bag for removing water from the refrigerant, and impurities containing the desiccant in the refrigerant. A tubular aluminum lower portion that accommodates the filter 30 to be removed and has a tank inlet 13 and a tank outlet 14 that form a refrigerant inflow path and a refrigerant outflow path on the side, with an upper end open and a lower end closed. It is equipped with a tank 12.
For example, a molecular sieve is used as the desiccant, and the desiccant is contained in a bag made of polyethylene terephthalate (PET).

As shown in FIG. 6, the upper tank 11 is formed by connecting a cylindrical portion 11d to a hemispherical tip portion 11a having a flat surface 11b at the top. The upper tank 11 is formed by molding a synthetic resin material by injection molding, blow molding, or the like, and a raised portion 11c having a flat surface 11b is integrally molded on the tip portion 11a thereof. The upper tank 11 may be a synthetic resin material such as polyamide (PA), polypropylene (PP), polyethylene terephthalate (PET), or polyphenylene sulfide (PPS), preferably 30% by mass of glass fiber. It is a polyamide resin (PA66-GF30) containing.

On the other hand, as shown in FIGS. 2 and 5, the lower tank 12 has an upper end opening 12b having an enlarged diameter at the upper end of a cylindrical base portion 12a formed of, for example, an extruded aluminum material, and the upper end thereof. An annular groove 12c is formed on the inner peripheral surface of the opening 12b. The cylindrical base portion 12a and the cylindrical portion 11d of the upper tank 11 are formed to have the same diameter. Further, the lower end opening of the cylindrical base portion 12a is closed by brazing the lower end cap member 12d made of aluminum. A tank inflow port 13 and a tank outflow port 14 that form a refrigerant inflow path and a refrigerant outflow path are provided on the side of the cylindrical base portion 12a.

In this case, by forming the upper end opening 12b and the annular groove 12c by plastic working, the wall thickness including the annular groove 12c in the lower tank 12 is formed to be constant. By forming the annular groove 12c by plastic working in this way, it is possible to eliminate the reduction in wall thickness as in cutting, and it is possible to improve the strength. An O-ring 40, which is an annular seal member, is fitted into the annular groove 12c. Further, the filter 30 is housed on the lower side of the lower tank 12.

As shown in FIG. 4, the filter 30 extends outward from the side end portion of the vertical section 32 intersecting with each other to form the upper openings 31 at equal intervals in the circumferential direction. , The upper flange portion 33 fitted in the lower tank 12, and the filter holding piece 34 extending downward from the center of the vertical section 32 and elastically deformable by contact with the lower end closing portion of the lower tank 12. The filter main body 35 made of synthetic resin is provided with the filter mesh 36 provided in the upper opening 31 provided in the upper flange portion 33. The filter 30 thus formed is inserted into the lower tank 12 when the upper tank 11 and the lower tank 12 are joined.

The lower tank 12 formed as described above is brazed to the header pipe 2b via the connecting member 50. In this case, as shown in FIGS. 2 and 3, the connecting member 50 includes a plate-shaped main body 51 that abuts on the joint surface of the lower tank 12, and a tank of the refrigerant outlet 7 and the lower tank 12 provided in the header pipe 2b. The refrigerant inflow path 52 that communicates with the inflow port 14, the refrigerant outflow path 53 that communicates the refrigerant inflow port 8 provided in the header pipe 2b and the tank outflow port 15 of the lower tank 12, and the longitudinal direction of the plate-shaped main body 51. The upper locking slit 9a provided above the refrigerant outlet 7 of the header pipe 2a and the lower engagement provided below the refrigerant inlet 8 are bent substantially orthogonally from both ends of the plate-shaped main body 51. It is provided with an outer upper locking piece 54 and an outer lower locking piece 55 that can be inserted into the stop slit 9b, that is, can be inserted.

In this case, the connecting member 50 is formed of a clad material coated with a brazing material on both sides, and the plate-shaped main body 51 has an arcuate cross section (an arcuate shape similar to the curvature of the lower tank 12). The outer upper locking piece 54 and the outer lower locking piece 55 are formed at the tips in a concave arc shape (arc shape similar to the curvature of the inner circumference of the header pipe 2b). The refrigerant inflow path 52 and the refrigerant outflow path 53 are formed by flanges 52a and 53a integrated with the edges of the inflow port and the outflow port provided in the plate-shaped main body 51 by burring processing on the plate-shaped main body 51. Instead of the flanges 52a and 53a formed by burring, a tubular member constituting the refrigerant inflow path 52 and the refrigerant outflow path 53 may be fastened by caulking in the inlet and outlet provided in the plate-shaped main body 51. ..

The lower end of the upper tank 11 is placed at the upper end with the O-ring 40 inserted in the annular groove 12c provided on the inner peripheral surface of the upper end opening 12b of the lower tank 12 brazed to the header pipe 2b. When inserted into the opening 12b, the O-ring 40 is compressed in the radial direction, and the upper tank 11 and the lower tank 12 are joined and integrated.

The upper end of the upper tank 11 joined to the lower tank 12 is fixed by a fixing bolt 70 which is a fixing member engaged with the bracket 60 which protrudes outward from the upper side in the vertical direction of the header pipe 2b and engages with the brazed bracket 60. In this case, as shown in FIGS. 6 and 7, the bracket 60 has a horizontal piece 62 (protruding portion) extending in the horizontal direction from the lower end portion of the joint portion 61 brazed and joined to the header pipe 2b. The horizontal piece 62 is provided with a screw hole 63. The fixing bolt 70, which is a fixing member, is engaged or screwed into the screw hole 63 provided in the horizontal piece 62 of the bracket 60 thus formed, and the tip portion of the fixing bolt 70 is provided in the tip portion 11a of the upper tank 11. The upper tank 11 is fixed by abutting on the flat surface 11b.

Next, the procedure for manufacturing the heat exchanger will be described.
First, the joint surface of the lower tank 12 is tentatively assembled by abutting the joint surface around the refrigerant outlet 7 and the refrigerant inlet 8 with the connecting member 50 interposed therebetween.

Next, the corrugated fin 4, the heat exchange tube 3, the other header pipe 2b, and the bracket 60 are assembled to the header pipe 2a and fixed with a jig. After applying flux to the fixed heat exchanger main body 1A and lower tank 12, carry it into the furnace and heat it at a predetermined temperature, for example, 600 ° C. to integrate the heat exchanger main body 1A and the lower tank 12. Braze.

The filter 30 is inserted into the lower tank 12 integrally brazed to the heat exchanger body 1A, and the O-ring 40 is inserted into the annular groove 12c provided in the upper end opening 12b of the lower tank 12. On the other hand, after the bagged desiccant 20 is housed in the upper tank 11, the upper tank 11 is moved above the lower tank 12 as shown in FIGS. 8A and 8B, and the lower end portion of the upper tank 11 is moved. Is inserted into the upper end opening 12b of the lower tank 12, then the fixing bolt 70 is screwed into the screw hole 63 provided in the horizontal piece 62 of the bracket 60, and the tip of the fixing bolt 70 is inserted into the tip 11a of the upper tank 11. The upper tank 11 is fixed in contact with the flat surface 11b of the above, and the production of the heat exchanger is completed.

Although the case where the upper tank 11 is formed of a synthetic resin member has been described, the upper tank 11 may be formed of an aluminum member instead of the synthetic resin member. In this case, as shown in FIGS. 1A and 7A, the upper tank 11A is a circular dish-shaped upper end cap member at the upper end opening of the upper tank body 11e formed in a cylindrical shape by, for example, an extruded aluminum profile. 11f is brazed and joined to form a structure in which the upper end is closed. The upper tank body 11e and the cylindrical base portion 12a of the lower tank 12 are formed to have the same diameter.

As described above, the aluminum upper tank 11A thus formed is screwed into the screw hole 63 provided in the bracket 60 in a state of being inserted and joined to the upper end opening 12b of the lower tank 12. The tip of the fixing bolt 70 is fixed by abutting the upper end flat surface of the upper end cap member 11f.
In FIGS. 1A and 7A, the other parts are designated by the same reference numerals and the description thereof will be omitted.

<Second Embodiment>
The second embodiment is a case where the upper tank 11A made of aluminum is replaced with the fixing bolt 70 of the first embodiment and the upper tank 11A is fixed by a fixing member 70A made of synthetic resin having heat insulating properties.

The upper tank 11A in the second embodiment has the same structure as the modified example of the first embodiment. That is, as shown in FIGS. 9 and 10, for example, a circular dish-shaped upper end cap member 11f is brazed and joined to the upper end opening of the upper tank body 11e formed in a cylindrical shape with an extruded aluminum material. It has a structure in which the upper end is closed.

The fixing member 70A in the second embodiment is formed of a constituent resin such as polypropylene (PP) or polyamide (PA) having heat insulating properties, and as shown in FIGS. 9 and 10, the bracket 60 protrudes. A substantially U-shaped adhered portion 71 attached to the bracket 60 with the horizontal piece 62 fitted therein, and a flat upper end portion of the upper tank 11A, which is vertically suspended on the lower surface of the adhered portion 71. It is integrally formed with a fixed leg portion 72 that presses and fixes the surface.
Since the other parts of the second embodiment are the same as those of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

When the upper tank 11A is fixed by the fixing member 70A of the second embodiment, as shown in FIG. 11, the lower end portion of the upper tank 11A is inserted into the upper end opening 12b of the lower tank 12, and the O-ring 40 is radially oriented. The adhered portion 71 of the fixing member 70A is fitted into the horizontal piece 62 (protruding portion) of the bracket 60 from the outside, and the fixing leg portion 72 is pressed against the upper end portion of the upper tank 11A to the upper portion. The tank 11A can be fixed.

Since the fixing member 70A is made of a synthetic resin member having heat insulating properties, it is possible to prevent the condensed refrigerant in the receiver tank 10 from re-evaporating due to heat transfer from the header pipe 2b.

<Third Embodiment>
In the third embodiment, the aluminum upper tank 11A is replaced with the fixing bolt 70 of the first embodiment and the fixing member 70A of the second embodiment by a synthetic rubber fixing member 70B having heat insulating properties and flexibility. This is the case of fixing the tank 11A.

Since the upper tank 11A in the third embodiment has the same structure as the modified example and the second embodiment of the first embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The fixing member 70B of the third embodiment is made of a synthetic rubber member having heat insulating properties and flexibility, for example, ethylene, propylene, diene, and methylene rubber (EPDM), as shown in FIGS. 12 and 13. A fixed cap 73 that is attached to the top of the upper tank 11A and a protrusion 74 that is projected from the fixed cap 73 and is inserted into a vertical through hole 64 provided in the horizontal piece 62 of the bracket 60. It is formed as one.

When the upper tank 11A is fixed by the fixing member 70B of the third embodiment, as shown in FIG. 14, the lower end portion of the upper tank 11A is inserted into the upper end opening 12b of the lower tank 12, and the O-ring 40 is radially oriented. The protrusion 74 of the fixing member 70B is elastically deformed and inserted into the through hole 64 of the bracket 60, and the fixing cap 73 is attached to the upper part of the upper tank 11A to fix the upper tank 11A. Can be done.

Since the fixing member 70B is made of a synthetic rubber member having heat insulating properties, it is possible to prevent the condensed refrigerant in the receiver tank 10 from re-evaporating due to heat transfer from the header pipe 2b.

According to the heat exchanger receiver tank 10 of the embodiment formed as described above, the annular groove on the inner peripheral surface of the upper end opening 12b of the lower tank 12 brazed and joined in advance to the header pipe 2b of the heat exchanger 1. The O-ring 40 arranged in the 12c is compressed in the radial direction to integrate the upper tanks 11 and 11A and the lower tank 12, and the fixing members 70 and 70A engaged with the bracket 60 brazed and joined to the header pipe 2b. By fixing the upper parts of the upper tanks 11 and 11A with 70B, it is easy to join the lower tank 12 brazed to the header pipe 2b of the heat exchanger 1 and the upper tanks 11 and 11A containing the desiccant 20. It can be sealed securely, and the upper tanks 11 and 11A can be easily and securely fixed. Therefore, it is possible to prevent liquid from entering through the upper end opening 12b of the lower tank 12, and it is possible to improve the corrosion resistance.

Further, the lower tank 12 is formed with a constant wall thickness including the annular groove 12c in the lower tank 12 by plastic working, so that the O-ring 40 is compressed in the radial direction when the upper tanks 11 and 11A and the lower tank 12 are connected. Since the strength of the annular groove 12c portion in which the ring is arranged can be maintained, it is possible to prevent leakage from occurring due to deformation of the annular groove portion when the internal pressure rises. Further, the joint between the upper tanks 11 and 11A and the lower tank 12 can be strengthened.

Further, since the parts other than the connection portion between the upper tanks 11 and 11A and the lower tank 12 can have the same diameter, the upper tanks 11 and 11A and the lower tank 12 are arranged with a constant distance from the header pipe 2b. can do.

1 Heat exchanger 1A Heat exchanger body 2a, 2b Header pipe 3 Heat exchange tube 10 Receiver tank 11, 11A Upper tank 11a Tip 11b Flat surface 11d Cylindrical 12 Lower tank 12a Cylindrical base 12b Upper end opening 12c Circular groove 20 Drying agent 30 Filter 31, 31A Vertical section 40 O-ring (annular sealing member)
50 Connection member 60 Bracket 61 Joint 62 Horizontal piece (protruding part)
63 Screw hole 64 Through hole 70 Fixing bolt (fixing member)
70A Fixed member 71 Adhesive part 72 Fixed leg part 70B Fixed member 73 Fixed cap 74 Protruding part

Claims (6)

In a heat exchanger comprising a pair of header pipes, each made of aluminum, and a plurality of heat exchange tubes erected in parallel with each other between the header pipes, one of the header pipes has an inflow path and an outflow path of the refrigerant. It is a receiver tank for heat exchangers that are joined together.
A cylindrical upper tank with a closed upper end and an open lower end, which contains a desiccant that removes the moisture of the refrigerant.
A filter for removing impurities in the refrigerant is housed, and a tank inlet and a tank outlet communicating with the inflow path and the outflow path of the refrigerant are provided on the side portion brazed and joined to the header pipe, and the upper end is open. And equipped with a tubular aluminum lower tank, which closes the lower end,
In the lower tank, an annular groove is provided on the inner peripheral surface of the upper end opening, and the lower end portion of the upper tank is inserted into the upper end opening in a state where the annular seal member is arranged in the annular groove, and the annular groove is formed. The seal member is compressed in the radial direction to integrate the upper tank and the lower tank.
The upper end of the upper tank is fixed by a fixing member that projects outward from the upper side in the vertical direction of the header pipe and engages with a brazed and joined bracket.
A receiver tank for heat exchangers. In the receiver tank for heat exchanger according to claim 1.
The lower tank is a receiver tank for a heat exchanger, characterized in that the thickness of the lower tank including the annular groove is formed to be constant. In the receiver tank for heat exchanger according to claim 1 or 2.
The upper tank and the lower tank are formed to have substantially the same diameter, and in the lower tank, the upper end opening is expanded and the annular groove is formed on the enlarged inner peripheral surface. A featured receiver tank for heat exchangers. In the receiver tank for heat exchanger according to any one of claims 1 to 3.
The upper tank is made of a synthetic resin member or an aluminum member.
A receiver tank for a heat exchanger, wherein the fixing member is formed of a fixing bolt that is screwed into a screw hole provided in the bracket and presses and fixes the upper end portion of the upper tank. In the receiver tank for heat exchanger according to any one of claims 1 to 3.
The upper tank is formed of an aluminum member, and the fixing member is vertically attached to an adhered portion to be attached to the bracket with the protruding portion of the bracket fitted and to the lower surface of the adhered portion. A receiver tank for a heat exchanger, characterized in that it is made of a synthetic resin member having heat insulating properties, which is integrally formed with a fixed leg portion for pressing and fixing the upper end portion of the upper tank. In the receiver tank for heat exchanger according to any one of claims 1 to 3.
The upper tank is made of an aluminum member and is made of aluminum.
The fixing member integrally forms a fixing cap that is attached to the top of the upper tank and a protrusion that protrudes from the fixing cap and is fitted into a vertical through hole provided in the bracket. A receiver tank for a heat exchanger, which is made of a synthetic rubber member having heat insulating properties and flexibility.

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