JP2001141332A - Method of producing recipient for liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a casing member of a recipient from being soldered badly by the influence of moisture discharged from a dessicant during soldering process. SOLUTION: Moisture discharged from a dessicant 137 during soldering process is decreased by the following steps comprising, desorpting moisture from a dessicant 137 by preheating the dessicant alone, filling the dehumidified dessicant 137 in a chamber 134 of a recipient 3, thereafter soldering case members 130, 131, 132 of the recipient 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum liquid receiver provided with a desiccant for adsorbing moisture in a refrigerant in a refrigeration cycle of an air conditioner, and a method of manufacturing an aluminum condenser integrated with the liquid receiver. Things.

[0002]

2. Description of the Related Art In a vehicle air conditioner, a refrigerant condensed in a condenser is separated into a gaseous refrigerant and a liquid-phase refrigerant by a receiver, and a desiccant is arranged in the receiver to form a refrigerant in the refrigerant. It absorbs moisture. Japanese Patent Application Laid-Open No. 7-180930 discloses a liquid receiver integrated with a condenser, and an aluminum case member of the liquid receiver is brazed with a desiccant contained therein. Has become.

[0003]

However, when the case member is brazed, the desiccant in the case is also exposed to the high temperature atmosphere (about 600 ° C.) of the furnace, so that the moisture in the desiccant is released and the case is released. Will be filled in. Therefore, the brazing portion is exposed to water vapor, so that an oxide film is easily formed, and there is a possibility that a brazing defect may occur.

The present invention has been made in view of the above points, and has been made of an aluminum receiver for brazing a case member with a desiccant stored therein, and an aluminum condenser integrating the receiver. , To prevent poor brazing.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, the divided case members (130, 131, 132) are brazed to form chambers (134, 135) therein. Are formed in the chambers (134, 13).
5) In the method for manufacturing an aluminum receiver for adsorbing moisture in a refrigerant by the desiccant (137) stored in the desiccant (137), the desiccant (13) is removed after the moisture in the desiccant (137) is desorbed.
7) is housed in the chamber (134, 135), and then the case members (130, 131, 132) are brazed.

[0006] As a result, since the moisture in the desiccant is desorbed before brazing, the amount of moisture released from the desiccant during brazing can be reduced or eliminated. Can be prevented.

Further, since the moisture in the desiccant is desorbed before brazing, the ability to substantially adsorb the desiccant increases. Therefore, the amount of the desiccant used can be reduced by that much,
Cost can be reduced.

[0008] As in the second aspect of the present invention, moisture in the desiccant (137) can be eliminated by heating.

According to the third aspect of the present invention, the desiccant (13
7) is heated to a heating temperature at the time of brazing the case members (130, 131, 132).

[0010] This makes it possible to eliminate moisture released from the desiccant at the time of brazing, and to more reliably prevent poor brazing.

According to the fourth aspect of the present invention, the divided case members (130, 131, 132) are brazed to form chambers (134, 135) therein, and the chambers (134, 135) are formed.
135) A method for manufacturing an aluminum receiver for adsorbing moisture in a refrigerant by a desiccant (137) stored in a chamber (134, 135) and a case member (130, 13).
1, 132) are formed in the case members (130, 131, 132) for communicating with the outside of the case members (130, 131, 132), and the desiccant (137) is stored in the chambers (134, 135). 131, 132),
The ventilation port (131a) is closed.

[0012] Accordingly, the water vapor generated by the release of moisture in the desiccant during brazing is discharged to the outside of the case member from the ventilation port, and therefore, even at the brazing portion at a position close to the desiccant. The attachment property is improved.

In the conventional method, since the water released from the desiccant during the brazing is full in the case member even after the brazing is completed, the water is again adsorbed to the desiccant after the brazing is completed. There was a problem. In contrast,
According to the invention described in claim 4, since the moisture of the desiccant released at the time of brazing is released to the outside of the case member,
It is possible to avoid moisture being adsorbed again after brazing, and the moisture in the desiccant after brazing is completed is smaller than before,
The substantial adsorption capacity of the desiccant is increased. Therefore, the amount of the desiccant used can be reduced by that much, and the cost can be reduced.

According to the fifth aspect of the present invention, the divided case members (130, 131, 132) are brazed to form chambers (134, 135) therein, and the chambers (134, 135) are formed.
In the aluminum receiver (3) that adsorbs moisture in the refrigerant by the desiccant (137) stored in the chamber (135), the chambers (134, 135) and the case members (130, 131, 1) are used.
A vent (131a) communicating with the outside of the case (32) is formed in the case member (130, 131, 132), and the vent (1) is formed.
31a) is closed by a closing member (139).

Thus, the liquid receiver can be manufactured by the same method as in the fourth aspect of the invention, and the same effect as that of the fourth aspect of the invention can be obtained.

In the invention according to claim 6, the aluminum condenser (2) for cooling and condensing the gas-phase refrigerant and the divided case members (130, 131, 132) are brazed to form a chamber inside. (134, 135), and an aluminum receiver (3) for adsorbing moisture in the refrigerant by a desiccant (137) stored in the chamber (134, 135). In the method for producing a condenser in which the gas phase refrigerant is introduced, the inlet (126)
And an outlet (128) through which the liquid-phase refrigerant flows out, and the case members (130, 131, 132) are formed in the chamber (13).
4, 135) and case members (130, 131, 132)
And a vent (131a) communicating with the outside of the container, the desiccant (137) is housed in the chamber (134, 135), and the inlet (126) and the outlet (128) are closed. The vessel (2) and the liquid receiver (3) are brazed together in an inert gas atmosphere.
a) is closed.

As a result, since the inlet and outlet of the refrigerant are closed during brazing, a large amount of inert gas in the condenser expanded by heating is released to the outside only through the vent, and In addition, moisture (water vapor) released from the desiccant is efficiently discharged to the outside. Therefore, brazing properties can be significantly improved.

In the invention according to claim 7, the vent (13)
1a) is characterized in that brazing is performed in a posture in which the chamber (134, 135) is located on the side in the horizontal direction.

Thus, the water vapor generated by releasing the moisture in the desiccant during brazing is easily discharged to the outside of the case member from the vent located on the side of the chamber.

According to the present invention, the second case member (13) is provided at the opening end of the cylindrical first case member (130).
1) is brazed to form chambers (134, 135) therein, and the desiccant (13) stored in the chambers (134, 135) is formed.
In the method for manufacturing a liquid receiver for adsorbing water in a refrigerant by the method (7), the cylindrical portion (13) formed on the second case member (131) and fitted to the inner peripheral side of the first case member (130).
1b), the tubular portion (131b) and the first case member (13
0) and a flow suppression space (1) that suppresses fluid flow at the fitting portion.
31c), and the desiccant (137) is placed in the chamber (134, 1).
35), and thereafter, the tubular portion (131b) is fitted to the first case member (130) to perform brazing.

As a result, at the time of brazing, since the gas (for example, nitrogen gas) is filled in the flow suppression space, it is difficult for water vapor to enter the flow suppression space. The water vapor stays in the flow suppression space. Therefore, passage of water vapor to the brazing portion side is suppressed, and poor brazing can be prevented.

According to the ninth aspect of the present invention, the chambers (134, 135) are formed inside the case members (130, 132), and the desiccant (1) stored in the chambers (134, 135) is formed.
37) in the method of manufacturing a liquid receiver for adsorbing moisture in a refrigerant by a first case member (130) having a bottomed cylindrical shape having one end closed and the other end opened; 130), the second case member (132) brazed to the open end of the case member (130, 13).
2), and the desiccant (137) is added to the first case member (1).
The first case member (130) and the second case member (132) are brazed by being housed in the closed end (130b) side of (30).

Accordingly, the closed end, which is in the vicinity of the desiccant and is most likely to be exposed to water vapor, is formed integrally with the cylindrical portion of the receiver casing, so that no brazing failure occurs in the first place. Further, since the brazing portions of the first case member (130) and the second case member (132) are separated from the desiccant storage portion and are not easily exposed to water vapor, it is possible to prevent poor brazing.

The reference numerals in parentheses of the above means indicate the correspondence with specific means described in the embodiments described later.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
FIG. 1 is a schematic diagram of a vehicle refrigeration cycle in which a liquid receiver according to the present invention is integrated with a refrigerant condenser and applied to a vehicle refrigeration cycle.

In FIG. 1, reference numeral 1 denotes a compressor for obtaining a driving force from a running engine (not shown) to suck and compress a refrigerant, and 2 for cooling a refrigerant discharged from the compressor 1 to produce a gas-phase refrigerant. Is a condenser (condenser) for condensing (liquefying). 3 is a receiver that separates the refrigerant flowing out of the condenser 2 into a gas-phase refrigerant and a liquid-phase refrigerant, stores excess refrigerant in the refrigeration cycle as a liquid-phase refrigerant, and discharges the liquid-phase refrigerant.
Reference numeral 4 denotes a subcooler (subcooler) that cools the liquid-phase refrigerant flowing out of the liquid receiver 3 to increase the degree of subcooling of the refrigerant (subcool). The liquid receiver 3 has a desiccant therein for absorbing moisture in the refrigerant.

In this embodiment, in addition to the condenser 2 and the receiver 3, the supercooler 4 is integrated to form the receiver-integrated condenser 100 (the part surrounded by the one-dot chain line). ). In addition, the receiver integrated condenser 100
Will be described later in detail.

Reference numeral 5 denotes a subcooler 4 (a condenser 10 integrated with a liquid receiver).
Reference numeral 6 denotes an evaporator that decompresses the refrigerant flowing out of the evaporator 5 and evaporates the refrigerant depressurized by the decompressor 5 to exhibit a refrigerating ability. The pressure reducer 5 is a temperature-type expansion valve that adjusts the throttle opening so that the refrigerant temperature at the outlet side of the evaporator 6 becomes a predetermined value.

Next, the condenser 100 integrated with the liquid receiver will be described.

FIG. 2 is a front view of the condenser integrated with a liquid receiver 100. Reference numeral 111 denotes a flat tube through which a refrigerant flows, and a corrugated roller is provided between the plurality of tubes 111. A molded fin 112 is provided, and the fin 112 and the tube 111 constitute a condensing core 110 for condensing the refrigerant.

First and second header tanks 121 and 122 are provided at both ends in the longitudinal direction of the tube 111 so as to extend in a direction (vertical direction) orthogonal to the longitudinal direction of the tube 111 and communicate with each tube 111. I have.
The first header tank 121 is formed by joining first and second plates 121a and 121b having a substantially U-shaped cross section to form a space extending in the vertical direction.
First and second caps 121 are provided at the upper and lower ends of 21a and 121b.
c and 121d are joined to close the upper and lower ends.

The inside of the first header tank 121 is divided by the first separator 124 into two spaces (121e, 121f in order from the top) in the longitudinal direction.
The second header tank 122 has two spaces (122 in order from the top) in the longitudinal direction thereof by the second separator 125.
a, 122b). Then, the space 121e of the first header tank 121, the second header tank 122
The condenser 2 is constituted by the space 122a and the condensing core 110. Incidentally, the refrigerant discharged from the compressor 1 is:
From the inflow port 126 to the space 122 of the second header tank 122
After flowing into a, the gas flows through the tube 111 and flows toward the space 121e of the first header tank 121. Then, the liquid flows into the liquid receiver 3 from the first opening 127 formed in the first plate 121 a of the first header tank 121.

Reference numeral 130 denotes a receiver casing (case member) formed in a cylindrical shape and extending in a direction parallel to the first header tank 121. Reference numerals 131 and 132 denote first and second ends of the receiver casing 130 which close both ends in the longitudinal direction. 1 and 2 caps (case members), and both the caps 131 and 132 and the liquid receiver casing 130 constitute the liquid receiver 3. Here, the first plate 121a of the first header tank 121 and the receiver casing 130 are integrally formed by extrusion.

A cup-shaped plate 133 is provided at an intermediate portion in the vertical direction in the liquid receiver 3 (liquid receiver casing 130), and the space inside the liquid receiver 3 is first and second by this plate 133. The chambers 134 and 135 are partitioned. The two chambers 134 and 135 communicate with each other through a communication hole 133a formed in the plate 133. Receiver casing 1
The protrusion 130 a formed at the middle part in the up-down direction of 30 is formed by a punch after extruding the liquid receiver casing 130, and the protrusion 130 a is used for positioning the plate 133.

A second opening 136 that connects the second chamber 135 and the space 121f of the first header tank 121 is formed below the first opening 127 in the liquid receiver 3. The refrigerant in the two chambers 135 flows into the space 121f from the second opening 136. The first chamber 134 contains a desiccant (zeolite) 137 that adsorbs moisture in the refrigerant, and a ceramic filter 138. Filter 13
Numeral 8 is arranged so as to cover the communication hole 133a of the plate 133, and prevents broken pieces of the desiccant 137 and abrasion powder from flowing into the second chamber 135 through the communication hole 133a.

In this embodiment, the space 121
f, 122b and first and second separators 124, 12
5. Tube 111 and fin 11 located below
2 forms the subcooler 4, the refrigerant flowing into the space 121 f from the second opening 136 passes through the subcooler 4.
After flowing through the condenser integrated with the receiver 100 through the outlet 128 formed in the second header tank 122, the refrigerant flows toward the decompressor 5.

In this embodiment, the tubes 111,
The components constituting the receiver-integrated condenser 100 such as the fins 112, the header tanks 121 and 122, and the receiver casing 130 are all made of aluminum except for the desiccant 137 and the filter 138. The parts are integrally joined by brazing. A clad material obtained by clad a brazing material is used for a part of the aluminum parts.

The specific material of the aluminum component will be described. The first plate 121a and the receiver casing 130, which are integrally formed by extrusion, are described.
For example, A3003 is used. Among other aluminum parts to be press-formed, bare parts are, for example, A3
103 is used, and A4045 is used as the cladding material component, for example.

Next, a description will be given of a method of manufacturing the above-mentioned condenser 100 with an integrated receiver. First, only the desiccant 137 is put into a furnace, and heated at the same temperature as the maximum temperature in the furnace (brazing temperature, about 600 ° C.) in a brazing step described later for about 10 minutes to evaporate the water in the desiccant 137. , So that the desiccant 1
The water in 37 is desorbed (removed). On the other hand, before and after the heating step of the desiccant 137, the condenser 10
0 is temporarily assembled. However, the first header tank 121
And the liquid receiver 3 are not assembled to the temporary assembly at the time of completion of the temporary assembly.

Next, the desiccant 137 from which water has been removed in the above-described heating step is put into the first chamber 134 of the liquid receiver 3 that has not been temporarily assembled, and the first cap 131 is assembled to form the first cap 131.
The open end of the chamber 134 is closed. Thereafter, the first header tank 121 and the liquid receiver 3 are assembled to the above-mentioned temporary assembly to complete the temporary assembly in the state shown in FIG. And
A temporary assembly state is maintained by applying a tightening force with an appropriate jig.

Next, the temporary assembly is carried into the brazing furnace while maintaining the temporary assembly state, and the temporary assembly is removed from the aluminum in a brazing furnace under a nitrogen (inert) gas atmosphere. By heating to the melting point (about 600 ° C.) of the brazing material of the clad material, the joints of the respective parts of the temporary assembly are integrally brazed. Thus, the assembly of the entire receiver integrated condenser 100 is completed.

In this brazing step, the tube 1
11 and the first and second header tanks 121, 1
Brazing of the temporarily assembled body is performed in a posture in which the longitudinal directions of both 22 are horizontal. Further, in the vehicle mounted state, the first chamber 134 of the liquid receiver 3 is positioned at an upper position, and the second chamber 135 is positioned at a lower position.

According to the above-described embodiment, after the water in the desiccant 137 is desorbed in advance, the desiccant 137 is stored in the first chamber 134 of the liquid receiver 3, and then the temporary assembly is integrally brazed. Therefore, the desiccant 137 itself is sufficiently dried at the time of brazing, and therefore, the moisture in the desiccant 137 is not released in the brazing process as in the related art. The brazing portion is not exposed to water vapor, so that poor brazing can be prevented.

In the step of heating only the desiccant 137, by heating to the heating temperature during brazing (in this example, the maximum temperature in the furnace in the brazing step, about 600 ° C.),
In the brazing step, the release of moisture in the desiccant 137 can be completely eliminated, and the brazing failure can be more reliably prevented.

Further, since the moisture in the desiccant 137 is removed before brazing, the substantial adsorption capacity of the desiccant 137 is increased. Therefore, the amount of the desiccant 137 used can be reduced by that much, and the cost can be reduced.

In the step of heating only the desiccant 137, it is not always necessary to heat the furnace to the maximum temperature in the brazing step (about 600 ° C. in this example). Desiccant 13 in the brazing process
The release of water in 7 can be suppressed to a level that does not affect brazing properties.

(Second Embodiment) In the first embodiment, only the desiccant 137 is heated to remove water before brazing, but in the present embodiment, the step of heating only the desiccant 137 is omitted. Abolished. Accordingly, in the present embodiment, FIG.
As shown in FIG.
By providing a, the water vapor generated by the release of the moisture in the desiccant 137 in the brazing step is discharged to the outside of the receiver casing 130 from the vent 131a.

The vent 131 a communicates the first chamber 134 with the outside of the receiver casing 130, and has a diameter smaller than the diameter of the desiccant 137 to prevent the granular desiccant 137 from flowing out. Here, the particle diameter of the desiccant 137 is about 2.0 mm, and the diameter of the vent 131a is about 1.5 m.
m. Further, after the assembly (brazing) of the entire receiver integrated condenser 100 is completed, as shown in FIG. 4, a plug (closing member) 139 made of aluminum is brazed to close the vent 131a.

In the brazing step, the tube 111
In the longitudinal direction and the first and second header tanks 121 and 122
Are brazed in a posture in which both longitudinal directions are horizontal. Therefore, in the brazing process, the vent 1
31a is located on the horizontal side of the first chamber 134.

Next, the receiver integrated type condenser 1 of this embodiment
00 will be described in the order of steps. First, after processing the aluminum component constituting the liquid receiver integrated condenser 100 into a predetermined shape, flux application is performed. Here, the material of the flux is a non-corrosive fluoride-based flux (K
F.AlF ₃ ) and the flux adhesion amount is about 1
２０20 g / m ² . Next, when the flux application is a wet type, a flux drying step is performed. Drying temperature is 15
At 0 ° C. to 200 ° C., the drying time is 10 minutes to 20 minutes.

Next, the desiccant 137 is supplied to the first chamber 1 of the receiver 3.
34, and the first cap 131 is attached to the first chamber 1
The open end of 34 is closed. Thereafter, the first header tank 121 and the liquid receiver 3 are assembled to the temporary assembled body except for the first header tank 121 and the liquid receiver 3 to complete the temporary assembled body shown in FIG. . Then, a temporary assembly state is maintained by applying a tightening force with an appropriate jig.

Next, a flux is applied to the temporary assembly again. The material and amount of the flux are the same as above. When the flux application is a wet type, the same drying step as described above is performed.

Next, the openings of the inlet 126 and the outlet 128 serving as the refrigerant inlet / outlet are closed with a detachable cap (made of metal) (not shown).

Next, brazing is performed using a brazing furnace in which the respective chambers are arranged in the order of a front chamber, a preheating chamber, a brazing chamber, a slow cooling chamber, and a rear chamber. Each of those chambers is isolated from the outside (atmospheric atmosphere) except for the temporary assembly body entrance and exit of the front and rear chambers, and when the entrance door is closed, all the rooms are isolated from the outside. It becomes a sealed state.

First, the temporary assembly is carried into the front chamber, and the vacuum pump is operated with the front chamber sealed. The operation of this vacuum pump evacuates the front chamber to about 0.1 Torr. As a result, the air, moisture, and the like in the front room and inside the temporary assembly are discharged to the outside. After completion of the evacuation, the front chamber is filled with nitrogen gas and the pressure in the front chamber is restored to about atmospheric pressure. As a result, nitrogen gas enters the temporary assembly through the vent 131a.

Next, the temporary assembly is carried into the preheating chamber, and the temporary assembly is preheated at 150 ° C. by the heater in the preheating chamber.

Next, the temporary assembly is carried into the brazing chamber, and the temporary assembly is heated to the brazing temperature (the melting point of the brazing material) by the heater in the brazing chamber, and is integrally brazed. . Here, since nitrogen gas flows into the brazing chamber, the brazing chamber is maintained in an atmosphere of nitrogen gas. Specific brazing conditions include brazing temperature: 600 ° C., brazing time: about 5 minutes, oxygen concentration in a nitrogen gas atmosphere: 100 ppm or less, dew point in a nitrogen gas atmosphere: −40 ° C. or less, nitrogen Gas atmosphere pressure: Atmospheric pressure.

After brazing is completed in the brazing chamber, the temporarily assembled body is then carried into a cooling room having a water-cooled jacket, where it is gradually cooled. After that, the temporary assembly is separated into an atmosphere and a nitrogen gas atmosphere and then carried into the room, and then the door of the room is opened and taken out of the brazing furnace.

After the above brazing step is completed, the caps attached to the inlet 126 and the outlet 128 are removed, and the plug 139 is brazed to form the vent 13.
1a to close the receiver integrated condenser 100
Complete assembly (brazing) is completed.

According to the present embodiment, in the brazing step, the water vapor generated by the release of the water in the desiccant 137 is discharged from the vent 131 a to the outside of the receiver casing 130, and The partial pressure of water vapor decreases. Therefore, the brazing property is also improved at the brazing portion between the liquid receiver casing 130 and the first cap 131 close to the desiccant 137.

In the brazing step, since the openings of the inlet 126 and the outlet 128 are closed, the inside and the outside of the temporary assembly are communicated only through the vent 131a. As a result, the following effects can be obtained.

That is, about 60 g of desiccant 137 is usually used in a receiver integrated condenser having an internal volume of about 3000 cc. If the initial moisture of the desiccant 137 is 1%, the desiccant 137 is placed in a brazing furnace. By heating to a brazing temperature of 600 ° C., about 2400 cc of steam is generated. On the other hand, the volume of the nitrogen gas filled in the temporary assembly at 600 ° C. also becomes about three times that at room temperature, and when the internal volume of the temporary assembly is 3000 cc, it becomes about 9000 cc, and about 6000 cc of nitrogen gas is temporarily reduced. Released outside the assembly.

The inlet 126 and the outlet 128
Is closed, the nitrogen gas is discharged to the outside only through the vent 131a, and thereby the steam is efficiently discharged to the outside. In addition, about 2400 cc of water vapor is released to the outside by about 6000 cc of nitrogen gas, and most of the water vapor is discharged to the outside. Therefore, brazing properties can be significantly improved.

In the brazing step, the moisture of the desiccant 137 is released, and the moisture (steam) is released to the outside of the temporary assembly, so that the moisture is not adsorbed again after brazing. As a result, the water content of the desiccant 137 in the temporary assembly is reduced by about 3% as compared with the conventional case, and the substantial adsorption capacity of the desiccant 137 is increased accordingly. And
Assuming that the water absorption capacity of the desiccant 137 is 20%, the desiccant 13
7 can be reduced by 15%, and cost can be reduced.

(Third Embodiment) In the present embodiment, the desiccant 1
The step of heating only 37 is eliminated. with this,
In the present embodiment, as shown in FIG.
The cylindrical portion 131b fitted to the inner peripheral side of the inner casing 30 and brazed to the inner peripheral surface of the receiver casing 130 is attached to the first cap 1
31.

A method for manufacturing the condenser 100 integrated with the liquid receiver of the present embodiment will be described. First, the first chamber 1 of the receiver 3
The desiccant 137 is put into the container 34, the first cap 131 is assembled, and the open end of the first chamber 134 is closed. Thereafter, the temporary assembly in the state shown in FIG. 5 is completed. Next, the temporarily assembled body is carried into the brazing furnace, and heated to the melting point of the brazing material (about 600 ° C.) in a nitrogen gas atmosphere, and the joints of the respective parts of the temporarily assembled body are integrally brazed. Thus, the assembly of the entire receiver integrated condenser 100 is completed.

By the way, when heated in a brazing furnace,
Water in the desiccant 137 is released to generate water vapor.
Then, a part of the steam passes through the condenser 2 and the subcooler 4 and is discharged to the outside through the inlet 126 and the outlet 128, but a part of the steam remains in the first chamber 134.

Therefore, brazing failure may occur on the lower side (first chamber 134 side) in FIG. 5 of the range of the length L of the brazing portion between the receiver casing 130 and the first cap 131. In the embodiment, the gap between the liquid receiver casing 130 and the cylindrical portion 131b is reduced to make it difficult for steam to enter the gap, and the brazing portion length L is increased (for example, 15 mm). Therefore, the water vapor does not reach the upper side of FIG. 5 in the range of the brazed portion length L, and therefore, it is possible to prevent the occurrence of the brazing failure in the upper side of the range of the brazed portion length L. it can.

(Fourth Embodiment) This embodiment is manufactured by the same method as the third embodiment, and differs from the third embodiment only in the configuration of the first cap 131. FIG.
As shown in FIG. 5, the first cap 131 of the present embodiment includes:
The cylindrical portion 1 fitted on the inner peripheral side of the receiver casing 130
A plurality of (two in this example) annular grooves (flow suppression spaces) 131c are formed in 31b. And this groove 131
c, the cylindrical portion 131b and the receiver casing 130
The flow of the fluid at the fitting portion is suppressed.

According to this, when heated in the brazing furnace, even if the moisture in the desiccant 137 is released and water vapor is generated, the groove 131c is filled with nitrogen gas. Since the pressure in the groove 131c increases due to the temperature rise, the water vapor hardly enters the groove 131c from the first chamber 134 side. Further, even if a small amount of water vapor enters, the water vapor remains in the groove 131c. Therefore, at least the end portion side of the groove 131c (FIG. 6)
Of the receiver casing 130 and the first
Brazing property with the cap 131 is ensured.

The cylindrical portion 131 of the first cap 131
Although the groove 131c is provided in b, the same effect can be obtained by providing a flow suppression space having the same shape as the groove 131c in the receiver casing 130.

(Fifth Embodiment) This embodiment is manufactured by a method similar to that of the third embodiment, and a ring is provided between the first cap 131 and the desiccant 137 as shown in FIG. A spacer 140 having a shape of is arranged. Then, a gap between the outer peripheral surface of the spacer 140 and the inner peripheral surface of the receiver casing 130 is set to be small so that water vapor hardly enters the gap.

According to this, when heated in the brazing furnace, even if the moisture in the desiccant 137 is released and steam is generated, the gap between the spacer 140 and the receiver casing 130 is small. Water vapor can be prevented from entering the brazed portion between the liquid casing 130 and the first cap 131, and the brazing property between the liquid casing 130 and the first cap 131 is ensured.

When the desiccant 137 is 45 g and the inner diameter of the receiver casing 130 is 30 mm, the spacer 140
Is desirably 10 mm or more.

(Sixth Embodiment) This embodiment is manufactured by a method similar to that of the third embodiment. As shown in FIG. A disk-shaped spacer 141 made of a material (for example, aluminum) that reacts with water in an atmosphere is provided.

According to this, even when the moisture in the desiccant 137 is released and steam is generated when heated in the brazing furnace, the brazing portion between the receiver casing 130 and the first cap 131 is formed. Before the steam reaches, the spacer 141
And the steam react with each other (the spacer 141 is oxidized), whereby the brazing property between the receiver casing 130 and the first cap 131 is ensured.

(Seventh Embodiment) In each of the above embodiments, the first plate 121a of the first header tank 121 and the receiver casing 130 are integrally formed by extrusion, but in the present embodiment, they are formed separately. And then integrated by brazing.

As shown in FIG. 9, the liquid receiver casing 130 of this embodiment is formed into a bottomed cylindrical shape by drawing. That is, the closed end portion 130b on one end side of the receiver casing 130 is integrally formed with the cylindrical portion 130c of the receiver casing 130. On the other hand, the second cap 132 is brazed to the open end on the other end side of the receiver casing 130. The desiccant 137 is disposed on the closed end 130b side of the liquid receiver casing 130.

Therefore, the closed end 130b which is in the vicinity of the desiccant 137 and which is most likely to be exposed to water vapor is formed integrally with the cylindrical portion 130c of the receiver casing 130, so that no brazing failure occurs in the first place.

(Eighth Embodiment) FIG. 10 shows an eighth embodiment, which is different from the above embodiments in that the desiccant 137 is stored in the liquid receiver 3 in a state packed in a bag 150. Specifically, the bag 150 is made of glass fiber (SiO ₂ ),
After packing the desiccant 137 in the bag 150, the opening of the bag 150 is closed so that the desiccant 137 does not flow out of the bag 150.

In the present embodiment, the desiccant 137 is heated in a state packed in the bag 150 before brazing, and then the desiccant 137 is stored in the liquid receiver 3 in the state packed in the bag 150. Then, the temporary assembled body of the liquid receiver integrated condenser 100 is brazed.

According to the present embodiment, the same effects as those of the first embodiment can be obtained, and the broken pieces of the desiccant 137 and the abrasion powder do not flow out of the bag 150. Therefore, the plate 133 and the filter 138 in the first embodiment can be obtained. Can be abolished.

Incidentally, even when the step of heating only the desiccant 137 is abolished as in the second to seventh embodiments, the eighth embodiment
As in the embodiment, a desiccant 137 packed in a bag 150 can be used. In that case, the plate 133 and the filter 138 in the second to seventh embodiments can be eliminated.

(Other Embodiments) In the first embodiment,
In the step of heating only the desiccant 137, vacuuming may be performed in order to discharge moisture and the like released from the desiccant 137 to the outside. In the second embodiment, the brazing is performed by closing the openings of the inlet 126 and the outlet 128, but the brazing is performed without closing the openings of the inlet 126 and the outlet 128. Is also good. In the third to fifth embodiments, the first cap 131 is
The ventilation holes 131a shown in the second embodiment may be added, and brazing may be performed in the same manner as in the second embodiment.

Further, in each of the above embodiments, the present invention is applied to the receiver integrated condenser 100 in which the condenser 2, the receiver 3, and the subcooler 4 are integrated. The present invention is also applicable to a device separated from the condenser 2 and the subcooler 4. The present invention is also applicable to a unit in which the condenser 2 having no supercooler 4 and the receiver 3 are integrated, and in this case, the outlet 128 is provided in the receiver 3.

[Brief description of the drawings]

FIG. 1 is a schematic view of a vehicle refrigeration cycle.

FIG. 2 is a front view of the condenser integrated with a receiver according to the first embodiment.

FIG. 3 is a front view showing a state before brazing of a receiver integrated type condenser according to a second embodiment.

FIG. 4 is a front view showing a completed state of a condenser integrated with a receiver according to a second embodiment.

FIG. 5 is a front view of a condenser integrated with a liquid receiver according to a third embodiment.

FIG. 6 is a front view of a receiver-integrated condenser according to a fourth embodiment.

FIG. 7 is a front view of a condenser integrated with a receiver according to a fifth embodiment.

FIG. 8 is a front view of a condenser integrated with a liquid receiver according to a sixth embodiment.

FIG. 9 is a front view of a condenser integrated with a liquid receiver according to a seventh embodiment.

FIG. 10 is a front view of a condenser integrated with a liquid receiver according to an eighth embodiment.

[Explanation of symbols]

3: liquid receiver, 130, 131, 132: case member, 1
34, 135: room, 137: desiccant.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Matsuo 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Yoshifumi Aki 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Denso Corporation (72) Inventor Ryoichi Sanada 1-1-1, Showa-cho, Kariya-shi, Aichi Pref.

Claims (9)

[Claims] A chamber (134, 13) is provided inside at least two divided case members (130, 131, 132).
5), the refrigerant passing through the chambers (134, 135) is separated into a gas-phase refrigerant and a liquid-phase refrigerant to store the liquid-phase refrigerant, and the desiccant ( 137) is applied to the aluminum liquid receiver (3) that adsorbs moisture in the refrigerant, and the case member (13)
0, 131, 132) by brazing, wherein the desiccant (137) is removed to the chambers (134, 135) after the water in the desiccant (137) is desorbed. A method for manufacturing a liquid receiver, comprising storing and then performing the brazing. 2. The method according to claim 1, wherein the desiccant (137) is heated to remove moisture in the desiccant (137). 3. The method according to claim 2, wherein the desiccant (137) is heated to a heating temperature at the time of brazing the case members (130, 131, 132). . 4. A chamber (134, 13) inside the case member (130, 131, 132) divided into at least two parts.
5), the refrigerant passing through the chambers (134, 135) is separated into a gas-phase refrigerant and a liquid-phase refrigerant to store the liquid-phase refrigerant, and the desiccant ( 137) is applied to the aluminum liquid receiver (3) that adsorbs moisture in the refrigerant, and the case member (13)
0, 131, 132) by brazing, wherein the chamber (134, 135) and the case member (130,
131, 132) that communicate with the outside.
a) is formed in the case members (130, 131, 132), and after the desiccant (137) is stored in the chambers (134, 135) and the case members (130, 131, 132) are brazed. A method for manufacturing a liquid receiver, wherein the vent (131a) is closed. 5. At least two divided case members (130, 131, 132) are brazed to form chambers (134, 135) therein, and the chambers (134, 13) are formed.
5) The refrigerant passing through the chamber is separated into a gas-phase refrigerant and a liquid-phase refrigerant to store the liquid-phase refrigerant, and the chamber (134, 135)
In the aluminum liquid receiver (3) that adsorbs moisture in the refrigerant by the desiccant (137) stored in the chamber, the chamber (134, 135) and the case member (130,
131, 132) that communicate with the outside.
a) is formed in said case member (130, 131, 132), and said vent (131a) is closed by a closing member (139). 6. An aluminum condenser (2) for cooling and condensing a gas-phase refrigerant, and a case member (130, 13) divided into at least two parts.
1, 132) to form chambers (134, 135),
The refrigerant condensed in the condenser (2) is supplied to the chamber (1).
34, 135) separates into a gas-phase refrigerant and a liquid-phase refrigerant, stores the liquid-phase refrigerant, and adsorbs moisture in the refrigerant by a desiccant (137) stored in the chambers (134, 135). A liquid receiver (3), wherein the condenser (2) and the liquid receiver (3) are integrally brazed together. An inlet (126), an outlet (128) through which the liquid refrigerant flows out, and the case members (130, 131, 132) are formed in the chamber (13).
4, 135) and the case members (130, 131, 13)
A ventilation port (131a) communicating with the outside of (2), storing the desiccant (137) in the chambers (134, 135), and having the inflow port (126) and the outflow port (1).
28), and then, the condenser (2) and the liquid receiver (3) are brazed together in an inert gas atmosphere, and thereafter, the vent (131a) is closed. A method for producing a condenser integrated with a receiver. 7. The room (13) is provided with the vent (131a).
The method for manufacturing a liquid receiver according to claim 4 or 6, wherein the brazing is performed in a posture positioned on the horizontal side in (4, 135). 8. A chamber (134, 135) is formed by disposing a second case member (131) at an open end of a cylindrical first case member (130).
5) The refrigerant passing through the chamber is separated into a gas-phase refrigerant and a liquid-phase refrigerant to store the liquid-phase refrigerant, and the chamber (134, 135)
The present invention is applied to an aluminum receiver for adsorbing water in the refrigerant by a desiccant (137) stored in the first case member, and the first case member (130) and the second case member (131) are joined by brazing. A cylindrical part (13) formed on the second case member (131) and fitted on the inner peripheral side of the first case member (130).
1b) and a flow suppression space (131c) for suppressing a fluid flow in a fitting portion between the cylindrical portion (131b) and the first case member (130). A method of manufacturing a liquid receiver, wherein the brazing is performed by fitting the cylindrical portion (131b) into the first case member (130) and then performing the brazing. 9. A chamber (134, 135) is formed inside the case member (130, 132), and said chamber (134, 13) is formed.
5) The refrigerant passing through the chamber is separated into a gas-phase refrigerant and a liquid-phase refrigerant to store the liquid-phase refrigerant, and the chamber (134, 135)
A method of manufacturing an aluminum receiver (3) for adsorbing water in a refrigerant by a desiccant (137) stored in a bottom case, wherein the first case has a closed-end cylindrical shape with one end closed and the other end opened. The member (130) and the first case member (1
30) The second case member (1) brazed to the open end of
32) to form the case members (130, 132), and the desiccant (137) to the first case member (130).
A method for manufacturing a liquid receiver, wherein the first case member (130) and the second case member (132) are housed on the side of the closed end (130b) and brazed to the first case member (130).