JP2000046444A - Sub-cooling system condenser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sub-cooling system condenser in which the number of component parts as well as the number of steps of assembling operation can be reduced, a heat exchanger and a receiver tank can be easily communicated with each other and connected from each other, and further maintenance and inspection of the receiver tank can be carried out without any trouble. SOLUTION: There are provided a heat exchanger 10 having a core 1 with heat exchanging pipe passages arranged in parallel between a pair of headers 11, having a condenser 2 at an upper location of the core 1 and a sub-cooling section 3 at a lower location; and a receiver tank 20. Union threads 21, 22 are integrally formed at a refrigerant inlet or outlet port of the receiver than 20. Union nuts 61, 62 are provided at the end sections of the refrigerant pipes 51, 52 connected to a refrigerant outlet 2b of the condensing section and a refrigerant inlet 3a of the sub-cooling section of the core 1. The union nuts 61, 62 are fastened against the union threads 21, 22 so as to cause the refrigerant pipes 51, 52 and the inlet or outlet of the receiver tank 20 to be communicated with each other and connected to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subcool system capacitor mainly used for a cooling mechanism for a car cooler.

[0002]

2. Description of the Related Art Generally, a cooling mechanism for a car cooler includes:
The high-temperature, high-pressure gas refrigerant discharged in a compressed state from the compressor is cooled and exchanged with the outside air in the condenser.
It is condensed and flows into a receiver tank (also referred to as a receiver drier, a liquid tank, etc.) in a gas-liquid mixed state, and only the liquid refrigerant separated in the receiver tank is vaporized at a low pressure and low temperature through an expansion valve. The heat inside the vehicle is discharged to the outside of the vehicle by a cooling cycle in which the refrigerant is sent to an evaporator as a liquefied state, where it is evaporated and vaporized by heat exchange with the air inside the vehicle and returned to the compressor.

[0003] In such a cooling mechanism, the refrigerant may not be sufficiently condensed by the condenser, and may be in an unstable state in which the refrigerant is vaporized by a small amount of heat reception or pressure loss, and there is a possibility that the cooling performance may decrease or fluctuate. is there. As a countermeasure, a second condenser (supercooler) is conventionally provided downstream of the receiver tank, and the liquid refrigerant is supercooled to a temperature lower by about 2 to 5 ° C than the condensing temperature by the supercooler. A method has been proposed in which the liquid refrigerant is sent to an evaporator in a stable state as a liquid refrigerant to increase the cooling efficiency.

In particular, in recent years, in a multi-flow type heat exchanger in which a number of heat exchange pipes are arranged in parallel on a pair of headers, the upper part thereof is configured as a condensing part, and the lower part is used for supercooling. A sub-cooling system condenser that has been configured as a condensing part, that is, a sub-cooling part, and has a receiver tank attached to one header has appeared.

[0005] In such a subcooled system condenser, there are many types of heat exchangers and receiver tanks, and there are also many types of vehicles to which these devices are applied. Many connection methods have been proposed, for example, in a connection method using a union joint, a union nut is attached to the end of the refrigerant pipe attached to the heat exchanger, and a union screw member is attached to the receiver tank side. Generally, the heat exchanger and the receiver tank are connected and connected via a refrigerant pipe by assembling and fastening a union nut to a union screw member.

[0006]

However, in the above-mentioned conventional method of connecting the heat exchanger and the receiver tank, it is necessary to assemble a separate union screw member with the receiver tank, which increases the number of parts. In addition, there has been a problem that the number of man-hours for assembling work is increased and the cost is increased.

On the other hand, conventionally, a method of connecting the tip of a refrigerant pipe attached to a heat exchanger to the entrance and exit of a receiver tank by welding, such as brazing, has also been adopted. Very cumbersome,
Not only is it difficult to connect the refrigerant pipe to the receiver tank, but if the refrigerant pipe is fixed to the receiver tank by brazing, the refrigerant pipe cannot be easily removed from the receiver tank, There is a problem that the inspection is hindered.

The present invention solves the above-mentioned problems of the prior art, can reduce the number of parts and the number of assembling operations, can reduce the cost, and can easily connect and connect the heat exchanger and the receiver tank. Further, it is an object of the present invention to provide a subcool system condenser capable of performing maintenance and inspection of a receiver tank without any trouble.

[0009]

In order to achieve the above object, a subcooled system condenser according to the present invention comprises a plurality of heat exchange pipes connected in parallel between both ends of a pair of headers extending in a vertical direction. A heat exchanger in which a condensing section is provided above the core, and a subcooling section is provided below the core, and a receiver tank attached to one of the headers, wherein the receiver The tank includes a tank upper member constituting an upper part thereof and a tank lower member constituting a lower part thereof, and a first union screw is integrally formed at a tank refrigerant inlet provided in the tank upper member. A second union screw is integrally formed at a tank refrigerant outlet provided in the tank lower member, and a condensing section provided at an upper portion of the one header One end of a first refrigerant pipe is connected to the medium outlet, and a first union nut corresponding to the first union screw is provided at the other end of the first refrigerant pipe, and the one header is provided. One end of a second refrigerant pipe is connected to a subcool part refrigerant inlet provided at a lower portion of the second refrigerant pipe, and a second union nut corresponding to the second union screw is connected to the other end of the second refrigerant pipe. Is provided, the first union nut is fastened to the first union screw, so that the other end of the first refrigerant pipe is connected to the tank refrigerant inlet and the second union is connected to the second union. The nut is fastened to the second union screw so that the other end of the second refrigerant pipe is connected to the tank refrigerant outlet in a gist.

In the subcool system capacitor of the present invention, since the union screw is formed integrally with the receiver tank, for example, the union screw member is
The number of parts and the number of assembling work steps can be reduced as compared with a case where the receiver tank is separately assembled.

Also, the refrigerant pipe can be easily connected to the receiver tank simply by fastening the union nut of the refrigerant pipe to the union screw of the receiver tank.

If the union nut is further loosened and removed,
The refrigerant pipe can be easily and easily removed from the receiver tank.

On the other hand, in the present invention, the tank upper member is constituted by a cylindrical member having an opening at the lower end, while the tank lower member has an opening at the upper end, and the peripheral edge of the opening is provided. The opening is formed with a stepped cylindrical type in which an inner peripheral step is formed at the lower end of the opening peripheral part. The outer peripheral part of the filter is provided on the inner peripheral step of the tank lower member. Is placed, and in a state where the desiccant is placed on the filter, the lower peripheral edge of the tank upper member is fitted into the opening peripheral edge of the tank lower member, and the tank upper member and It is preferable to adopt a configuration in which the lower members are integrated by brazing.

That is, when this configuration is adopted, the receiver tank can be assembled by a single brazing process of brazing the tank upper member and the lower member.

Moreover, since the peripheral edge of the opening of the tank lower member is used not only for mounting the tank upper member but also for assembling a filter and a desiccant, for example, it is used for filter attachment and desiccant. It is not necessary to separately perform processing or the like for mounting, and accordingly, the tank manufacturing processing can be easily performed, and the tank shape can be simply configured.

[0016]

FIG. 1 is a diagram showing a subcooled system condenser according to an embodiment of the present invention. As shown in the figure, the subcooled system condenser basically includes a multi-flow type heat exchanger (10) and a receiver tank (20).

The heat exchanger (10) includes a plurality of horizontally extending flat tubes (12) as heat exchange conduits between a pair of left and right vertical headers (11) facing each other at a distance. ) But their ends are both headers (11)
While being connected to (11), they are arranged in parallel at predetermined intervals in the vertical direction, and
The core (1) is configured by disposing the corrugated fins (13) between each of 2) and outside the outermost flat tube (12). In addition, (14) is a strip-shaped side plate arranged outside the outermost fin (13) to protect the outermost fin (13).

As shown in FIGS. 1 and 4, the core (1) of the heat exchanger (10) includes two headers (11) and (11).
(11a) at the same height position in the lower part of
(11a) is provided, and the partition member (11a) is provided.
A condensing section (2) is provided on the upper side of (11a), and a subcool section (3) independent of the condensing section (2) is provided on the lower side.

In the condensing part (2), a position slightly above the middle part of the left header (11) and the right (one)
At the upper position of the header (11), a partition member (11
b) (11b) is provided.

In the middle of the left header (11),
A condensing portion refrigerant inlet (2a) is provided corresponding to a lower left end of the condensing portion (2), and a right header (11) is provided.
Is provided with a condenser outlet (2b) corresponding to the upper right side of the condenser (2). As a result, the refrigerant flowing into the condensing section (2) from the condensing section refrigerant inlet (2a) flows in the condensing section (2) in a meandering manner from bottom to top, and flows from the condensing section refrigerant outlet (2b). Configured to be spilled.

At the lower end of the right header (11),
A subcool part refrigerant inlet (3a) is provided corresponding to the right end of the subcool part (3), and a subcool part refrigerant outlet is provided at the lower end of the left header (11), corresponding to the left end of the subcool part (3). (3b) is provided, and the refrigerant flowing from the subcool part refrigerant inlet (3a) is configured to be supercooled through the subcool part (3) and then flow out from the refrigerant outlet (3b). I have.

The condensing section refrigerant inlet (2) in the core (1)
a) is connected to a refrigerant introduction pipe (1a), and a subcooler outlet (3b) is connected to a refrigerant discharge pipe (1a).
b) is connected in communication.

One end of a first refrigerant pipe (51) is connected to the condensing portion refrigerant outlet (2b) of the core (1), and the subcooling portion refrigerant inlet (3a) is connected to the subcooling portion refrigerant inlet (3a).
A second refrigerant pipe (52) is connected in communication. Further, a bracket (15) for fixing a receiver tank (20) to be described later is attached to a central portion of the right header (11).

As shown in FIGS. 1 and 3, the other end of the first refrigerant pipe (51) is formed with a flange (51a) and an O-ring mounting peripheral groove (51b). A union nut (61) is attached. Second
A flange (52a) and an O-ring mounting peripheral groove (52b) are formed at the other end of the refrigerant pipe (52).
A second union nut (62) is attached.

In the heat exchanger (10) having the above configuration,
Header (11), flat tube (12), fin (1
3) In addition to heat exchanger components such as side plate (14), bracket (15), refrigerant pipes (1a) (1b) (5)
1) The attachment member such as (52) is made of aluminum or an alloy thereof, and is a combination of materials that can be brazed to each other;
For example, a combination of brazing sheet and bare material,
It is constituted by a combination of a brazing sheet and a brazing sheet. Then, these members are temporarily assembled and, in the temporarily assembled state, are collectively brazed in a furnace to be integrally connected and integrated.

On the other hand, as shown in FIGS. 2 and 3, the receiver tank (20) has a tank upper member (30) constituting an upper part thereof and a tank lower member (4) constituting a lower part thereof.
0).

The tank upper member (30) is made of, for example, a cylindrical forged product made of aluminum or an alloy thereof, has an opening (31) at the lower end, and has a tank refrigerant inlet (20a) at the center of the ceiling wall. ) Is provided. The periphery of the refrigerant inlet (20a) in the tank upper member (30) is formed so as to protrude upward, and a male screw is engraved on the outer periphery of the protrusion, whereby the first union nut ( The first union screw (21) corresponding to 51) is connected to the tank upper member (3).
0).

Similarly to the upper member (30), the tank lower member (40) is formed of a stepped cylindrical forged product made of aluminum or its alloy, and has an opening (41) at the upper end. A tank refrigerant outlet (20b) is provided at the center of the bottom wall. Further, an opening peripheral portion (42) of the lower member (40) is formed so as to expand in diameter, and an inner peripheral step (43) continuous in the circumferential direction is provided at a lower end of the opening peripheral portion (42). Is formed. Further, the peripheral portion of the refrigerant outlet (20b) in the tank lower member (40) is formed so as to protrude downward, and a male screw is engraved on the outer periphery of the protruding portion, so that the second union is formed. A second union screw (22) corresponding to the nut (52) is formed integrally with the tank lower member (40).

The receiver tank (20) has a housing composed of the upper member (30) and the lower member (40), and a filter (25) and a desiccant (26) are housed in the housing. It is assembled as follows.

That is, a disk-shaped filter (2) is inserted into the tank lower member (40) from the opening (41).
5) is accommodated and the outer peripheral edge of the filter (25) is locked to the inner peripheral step (43) of the tank lower member (40), whereby the filter (25) is connected to the tank lower member (4).
0). Further, a desiccant (26) is placed on the filter (25). In addition, desiccant (26)
Can be easily handled by, for example, being housed in a cylindrical container and employing a cartridge system.

Subsequently, the lower peripheral edge of the tank upper member (30) is fitted into the opening peripheral edge (42) of the tank lower member (40) so as to accommodate the desiccant (26). The upper edge of the tank lower member (40) is welded to the outer peripheral side surface of the tank upper member (30) with a brazing material (27), thus assembling the receiver tank (20).

Subsequently, the first and second refrigerant pipes (51)
After the O-rings (24) and (24) are mounted in the O-ring mounting peripheral grooves (51b) and (52b) of (52), the end of the first refrigerant pipe (51) is connected to its flange (51a). Into the receiver tank (20) until it locks with the periphery of the refrigerant inlet (20a), and is fitted to the refrigerant inlet (20a), and the first union nut (61) is screwed into the first union screw (21). And the end of the second refrigerant pipe (52) is inserted until the flange (52a) of the second refrigerant pipe (52a) is engaged with the periphery of the refrigerant outlet (20b) in the receiver tank (20). ) And fasten the second union nut (62) to the first union screw (22).

As a result, the condensing portion refrigerant outlet (2b) of the heat exchanger (10) is connected to the tank refrigerant inlet (20a) through the first refrigerant pipe (51) and the tank refrigerant outlet (20b). ) Is connected to the subcooler refrigerant inlet (3a).

Further, as shown in FIG. 1, the outer periphery of the receiver tank (20) is fixed to the bracket (1) of the heat exchanger (10).
The receiver tank (20) is fixed to the right header (11) by being gripped by the gripper (15a) of 5). The fixing of the receiver tank (20) by the bracket (15) may be performed before the union nuts (61) and (62) are fastened to the screws (21) and (22).

In the subcooled system condenser having the above structure, as shown in FIGS. 1 and 4, the condenser is introduced into the condenser section (2) through the refrigerant introduction pipe (1a) and the condenser section refrigerant inlet (2a). The refrigerant in the vapor phase is condensed (2)
Is cooled and condensed while flowing in a meandering manner from below to above, and the condensing portion refrigerant outlet (2b) and the first refrigerant pipe (5)
Via 1), it is introduced into the receiver tank (20). In the receiver tank (20), moisture and impurities are removed from the refrigerant by the desiccant (26) and the filter (25), and only the liquid refrigerant is removed from the tank refrigerant outlet (20b) and the second refrigerant pipe (52). ) And through the subcool part refrigerant inlet (3a) to be introduced into the subcool part (3).

The liquid refrigerant introduced into the subcool section (3) is supercooled to a predetermined temperature and then passes through the subcool section refrigerant outlet (3b) and the refrigerant outlet pipe (1b).
It is sent to an expansion valve (not shown).

According to this subcool system capacitor, the union screws (21) and (22) are formed integrally with the receiver tank (20), so that, for example, a union screw member is compared with a case where a union screw member is separately assembled to the receiver tank. Reduces the number of parts and assembly work,
Costs can be reduced.

Further, in this embodiment, since the housing of the receiver tank (20) is composed of only two members, the upper member (30) and the lower member (40), the number of parts can be further reduced. , Can be reduced.
Further, the receiver tank (20) can be assembled by only one brazing of brazing the tank upper member (30) and the lower member (40), thereby further reducing the number of assembling operations. Can be.

Further, in the present embodiment, the diameter of the opening peripheral portion (42) of the tank lower member (40) is enlarged to form a fitting assembly portion for the tank upper member (30), while the opening peripheral portion is formed. (42) Using the inner peripheral step (43) at the lower end,
The filter (25) and the desiccant (26) are assembled. That is, in addition to using the opening peripheral portion (42) of the tank lower member (40) for mounting the tank upper member (30), the filter (25) and the desiccant (2) are used.
Since it is also used for assembling of 5), it is not necessary to separately perform processing, for example, for mounting a filter or desiccant, so that the tank manufacturing process can be simplified and the tank shape can be simplified. This has the advantage that the cost can be further reduced.

In the present embodiment, the refrigerant pipe (5
1) Connect the union nuts (61) and (62) of (52) to the union screws (21) and (2) of the receiver tank (20).
2) Refrigerant pipes (51) and (52) simply by fastening
Can be connected to the receiver tank (20), and the connection can be easily performed. Further, if the union nuts (61) and (62) are loosened and removed, the refrigerant pipes (51) and (52) can be easily and easily connected to the receiver tank (2).
0), the receiver tank (20) can be maintained and inspected smoothly without any trouble.

In the present invention, detailed configurations such as the number of passes in the core (1), the condensing portion (2), and the subcool portion (3), the number of passages in each pass, and the vertical and horizontal dimensions of the heat exchanger (10) are described. In addition to the above embodiment, various design changes can be made.

[0042]

As described above, according to the subcool system capacitor of the present invention, since the union screw is formed integrally with the receiver tank, for example, when the union screw member is separately assembled to the receiver tank. In comparison, the number of parts and the number of assembly operations can be reduced, and the cost can be reduced. Further, since the refrigerant pipe can be connected to the receiver tank simply by fastening the union nut of the refrigerant pipe to the union screw of the receiver tank, the communication connection operation can be easily performed. Furthermore, if you unscrew and remove the union nut,
Since the refrigerant pipe can be removed from the receiver tank, there is an effect that maintenance and inspection of the receiver tank can be performed without any trouble.

In the present invention, as the tank upper member,
Use a cylindrical type with an open bottom and use a cylindrical type with an open top and a step as the lower part of the tank, and use the inner peripheral step of the lower part of the tank to filter and dry. When the agent is placed and the upper tank member is fitted to the lower member and brazing is integrated, the receiver tank is brazed only once by brazing the upper and lower tank members. Since it can be assembled, the number of assembly work can be further reduced,
Costs can be further reduced. Moreover, since the peripheral edge of the opening of the lower tank member is used not only for mounting the upper tank member but also for assembling a filter and a desiccant, for example, for mounting a filter or for mounting a desiccant. Since there is no need to separately perform processing or the like, there is an advantage that the tank manufacturing processing can be simplified, the tank shape can be simply configured, and the cost can be further reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a subcool system capacitor according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a receiver tank applied to the subcooled system condenser of the embodiment, wherein FIG. 2 is a cross-sectional view in an assembled state, and FIG. 2B is a cross-sectional view in an exploded state.

FIG. 3 is an exploded cross-sectional view showing the vicinity of an entrance / exit portion of a receiver tank in the subcool system condenser of the embodiment.

FIG. 4 is a front view showing a refrigerant path in the subcool system condenser of the embodiment.

[Description of Signs] 1 core 2 condensing part 2b condensing part refrigerant outlet 3 subcool part 3a subcool part refrigerant inlet 10 heat exchanger 11 header 12 flat tube (heat exchange pipeline) 20 receiver tank 20a ... tank refrigerant inlet 20b ... tank refrigerant outlet 21, 22 ... union screw 30 ... tank upper member 40 ... tank lower member 41 ... opening 42 ... opening peripheral part 43 ... inner peripheral step 51, 52 ... refrigerant pipe 61 62 ... Union nut

Claims (2)

[Claims] 1. A core in which a plurality of heat exchange pipes connecting both ends to both headers are arranged in parallel between a pair of headers along a vertical direction, and a condensing section is provided above the cores. And a heat exchanger provided with a subcooler section at a lower level, and a receiver tank attached to one header, wherein the receiver tank has a tank upper member forming an upper part thereof, and a tank lower part forming a lower part. A side member, and a first refrigerant inlet provided in the tank upper member.
And a second union screw is integrally formed at a tank refrigerant outlet provided in the tank lower member, and a condensing section provided at an upper portion of the one header One end of a first refrigerant pipe is connected to the refrigerant outlet, and a first union nut corresponding to the first union screw is provided at the other end of the first refrigerant pipe; One end of the second refrigerant pipe is connected to a subcool part refrigerant inlet provided at the lower part of
The other end of the second refrigerant pipe is provided with a second union nut corresponding to the second union screw, and the first union nut is fastened to the first union screw, whereby The other end of the first refrigerant pipe is connected in communication with the tank refrigerant inlet, and the second union nut is fastened to the second union screw. A subcooled system condenser connected to the tank refrigerant outlet. 2. The tank upper member is constituted by a cylindrical member having an opening at a lower end, while the tank lower member has an opening at an upper end, and the peripheral edge of the opening is formed to have an enlarged diameter. And a stepped cylindrical type having an inner peripheral step formed at a lower end of the opening peripheral part, and an outer peripheral part of the filter is arranged at an inner peripheral step of the tank lower member. With the desiccant disposed on the filter, the lower edge of the tank upper member is fitted into the opening edge of the tank lower member, and the tank upper member and the lower member are brazed to each other. The subcool system capacitor according to claim 1, which is integrated.