WO1999010690A1

WO1999010690A1 - Receiver tank and filter member therefor

Info

Publication number: WO1999010690A1
Application number: PCT/JP1998/003695
Authority: WO
Inventors: Soichi Kato; Akihiko Takano
Original assignee: Zexel Corporation
Priority date: 1997-08-21
Filing date: 1998-08-20
Publication date: 1999-03-04

Abstract

A receiver tank comprising an elongated, closed vessel provided with an inlet (24) and an outlet (25) for a liquid refrigerant to store therein the liquid refrigerant, an opening formed on top of the receiver tank (2), an engagement member (20a) detachably engaged with the opening to close the same, a filter member (22, 28) abutted against the engagement member (20a) to remove impurities in the refrigerant, and a dryer (23) attached to the filter member and provided therein with a desiccating agent. The closed vessel comprises inner and outer double-pipes (16, 17) which communicate to each other at the upper portions thereof but do not communicate to each other at the lower portions thereof, and the filter member (22, 28) is provided on the communicating area at the upper portions of the double-pipes in contact with the engagement member (20a).

Description

Akira Itoda Receiver tank and its filter components Technical field

The present invention relates to a receiver tank used for an automotive cooling cycle, and more particularly to a receiver tank in which functional members such as a filter member and a drying member provided inside the receiver tank can be easily replaced. Background art

Generally, in a cooling cycle for automobiles, for example, a laminated heat exchanger is known as a heat exchange medium aggregating device. This heat exchanger is used to prevent a decrease in cooling capacity. Receiver tank is connected.

The receiver tank separates the heat exchange medium, which has undergone heat exchange with the external air into a gas-liquid two-phase state, in a heat exchanger, by gas-liquid separation, and functions as a dryer and a filter provided in the receiver tank. This is a device that removes water and foreign substances by using parts, and flows into the regenerator as a liquid single-phase heat exchange medium to circulate the cooling cycle. As described above, when the receiver tank is connected, the heat exchange medium is separated into gas and liquid by the receiver tank and becomes a liquid single-phase heat exchange medium containing no gas medium.

The receiver tank has a predetermined internal volume and is provided so that a sufficient amount of liquefied refrigerant can be stored.

Therefore, with such a receiver tank, it is possible to always secure a stable circulation amount of the refrigerant and to prevent a decrease in the cooling capacity, etc., irrespective of external environmental conditions or changes in operation settings by the user or the like. it can. In addition, since this receiver tank has functional parts such as a filter and a desiccant inside, these functional parts remove foreign matter and moisture from the medium, and circulate the heat exchange medium in a clean state. To be able to do so.

Conventionally, as shown in Japanese Patent Application Laid-Open No. H11-31667 and Japanese Patent Application Laid-Open No. H08-219590, this type of cooling cycle coagulator is used for a filter-dryer or the like. The functional components are removably mounted in the receiver tank by bolts and other members.

The functional components such as the filter and the dryer are used for a long period of time, so that the function of removing the impurities or the performance of absorbing moisture and the like is deteriorated, resulting in a decrease in the function. Replacement is required.

For example, the invention described in the above-mentioned Japanese Patent Application Laid-Open No. 4131667 discloses a method in which a desiccant is fixed to an upper lid that closes an upper opening of a receiver tank by a bolt so that the desiccant can be detached. This allows for replacement.

In addition, the invention described in Japanese Patent Application Laid-Open No. 8-219590 is intended to close a lower end opening of a receiver tank and to attach a functional part such as a dryer to a fusible plug having a safety function. The fusible plug is screwed into the cylinder constituting the receiver tank so that replacement is possible.

The fusible plug is a melt bolt that is opened at a predetermined pressure and temperature. When the cooling cycle including the receiver tank is abnormally pressurized by the fusible plug, the fusible plug is provided on the melt bolt. The solder melts and releases the pressure to the outside to prevent damage to the receiver tank and piping. Functional parts having a safety function, such as fusible plugs, are generally provided at the lower end of the receiver tank so that they are relatively safe even if refrigerant leaks accidentally.

However, as described above, the conventional functional components are receiver tuners. Since the connection is made through other members such as bolts in the rack, the number of parts increases, the replacement work becomes complicated, and the cost cannot be reduced.

In addition, when a functional component is attached to a fusible plug that also has a sealing function to close the opening at the lower end of the receiver tank, a vehicle with an agglomerated cycle must be installed to replace the filter inside the receiver tank. There was a problem that the work would be complicated because the operator would have to go underneath to perform the replacement work.

Further, since the conventional liquid receiver has a structure in which a desiccant or the like is held in a single tube, a gas-liquid two-phase heat exchange medium flows through the liquid receiver, and After being separated into two phases, a gas medium and a liquid medium, by the desiccant or the like, there is a possibility that they may be mixed again into the gas-liquid two phases depending on environmental conditions and the like.

That is, the flow path of the medium that has flowed into the receiver tank is formed as a simple one-way linear path, and a structure in which a desiccant or the like is provided in the middle of this path. As a result, the gas medium and the liquid medium are mixed again, and it is difficult to obtain sufficient gas-liquid separation performance.

Therefore, an object of the present invention is to provide a receiver tank capable of facilitating replacement of functional components such as a filter and a dryer mounted inside the receiver tank and improving gas-liquid separation performance. Further, conventionally, as shown in FIG. 15, the receiver tank 90 and the heat exchanger (condenser) 91 are connected via a pipe 92, and the receiver tank 90 is provided for each vehicle. The installation space was secured, and pipes with unique shapes were set for each vehicle.

Also, to hold the receiver tank 90, a band-shaped bra The kit 93 was required, and as a result, the cost was increased together with the pipe 92.

In recent years, there has been an increasing demand for modularization and commonality of vehicle parts, and the time has come for a review of the conventional method of setting pipes for each vehicle.

Therefore, the receiver tank and condenser are integrated, and the receiver section is made smaller by reducing the diameter of the receiver section. In order to facilitate gas-liquid separation and easy replacement of filters and dryers, a double-tube structure is adopted. A battan has been devised.

There is a problem that functional components such as filters and dryers provided in such a double-tube receiver tank cannot be handled by the filter members and the like used in conventional single-tube receiver tanks.

Therefore, an object of the present invention is to provide a filter member of a receiver tank which can be applied to a receiver tank having a double-tube structure, can be easily assembled with a filter and a desiccant, and can be easily replaced.

Disclosure of the invention

The invention described in claim 1 of the present application is directed to a tank for storing a liquid refrigerant inside a vertically long hermetic container having an inlet portion and an outlet portion for the liquid refrigerant,

An opening is formed in the upper end of the receiver tank, and a locking member is detachably locked in the opening to be hermetically sealed, and contacts the locking member to remove impurities in the refrigerant. A filter member to

The receiver tank has a configuration in which a dryer having a drying material provided therein is attached to the filter member.

In this way, the locking member is located at the opening at the upper end of the receiver tank. If the filter member and the dryer are detachably locked and are provided in contact with the locking member, the filter member and the dryer etc. are attached after the cohesion cycle such as the receiver tank is attached to the vehicle body. When exchanging the functional parts, the screw connection between the receiver tank and the locking member is released, and the locking member is removed, whereby a filter member and a dryer that come into contact with the locking member from the upper part of the vehicle body. That is, it is possible to easily replace a functional component having a foreign matter removing or moisture removing function, and to eliminate the troublesome work of diving under a vehicle body and replacing a functional component as in the related art, thereby improving workability. Can be improved.

In addition, only the functional parts can be replaced, so that it is not necessary to replace the receiver tank or the entire heat exchanger, and the cost can be reduced.

The invention described in claim 2 of the present application is the invention according to claim 1, wherein the opening at the upper end of the receiver tank is brazed with a ring-shaped edge member having an internal thread portion on the inner periphery. In addition, the receiver tank has a configuration in which a locking member is detachably screwed to the edge member.

As described above, the locking member provided with the filter member and the desiccant is screwed and locked to the receiver tank, thereby facilitating the attachment and detachment of the locking member, and the filter member and the drying agent. Replacement of functional components such as chemicals can be simplified.

The invention described in claim 3 of the present application is directed to a receiver tank that includes an inlet and an outlet for a liquid coolant in a vertically long sealed container and stores the liquid coolant therein.

The sealed container is formed by inner and outer double pipes, the upper parts of these double pipes are provided so as to communicate with each other, and the lower part is provided non-communicatively. The outlet portion is provided so as to communicate with a flow passage formed between the double pipes when inserted. A lower tank provided at the lower end of the pipe so as to communicate with the inside of the inner pipe,

An opening is formed in the upper end of the receiver tank, and a locking member is detachably locked in the opening to be hermetically sealed. A filter member is provided in contact with the member to remove impurities in the coolant,

A receiver tank having a configuration in which a dryer having a drying material provided therein is attached to the filter member.

As described above, the receiver tank is formed of a double pipe, and a filter member for removing impurities in the refrigerant is provided at the upper communication portion of the double pipe in contact with the locking member. In addition, the dryer is housed inside the inner tube.

Therefore, the heat exchange medium that has flowed into the inside of the double pipe from the inlet portion and once rises flows through the filter member at the upper communication portion, descends in the inner pipe containing the dryer, and is separated into gas and liquid. As a result, since the filter member and the dryer are provided along the flow path of the refrigerant, the gas medium and the liquid medium can be used without mixing the gas-liquid two-phase heat exchange medium taken in from the inlet portion again. This can improve the gas-liquid separation performance of the receiver tank.

The invention described in claim 4 of the present application has a vertically long shape in which refrigerant separation in a gas-liquid mixed state is performed, and an inner pipe for storing the liquid refrigerant after the gas-liquid separation inside and an upper part of the outer pipe communicate with each other. In the receiver tank having the double pipe structure, the filter member is configured to abut on the upper end of the inner pipe to remove impurities in the refrigerant, and the filter member is aligned with the upper end opening of the pipe in the receiver tank. A configuration in which the other end is brought into contact with the end of the inner pipe and the other end is pressed against a locking member which is locked to an upper end opening of the outer pipe of the receiver tank, and is held between the inner pipe and the locking member. This is a filter member of the receiver tank. The double-tube receiver tank forms a sufficiently long refrigerant flow path that rises and then descends by the inner and outer double tubes, so that the gas-liquid two-phase heat exchange medium can be used. In addition, the performance of gas-liquid separation can be improved, and the liquefied refrigerant can be stored in the lower part of the non-communicating receiver tank. For this reason, the separated gaseous refrigerant can be held in the upper part of the tank, and the liquid refrigerant that has flowed down can be stored in the lower part of the tank, so that the refrigerant separation performance can be improved without using a special seal member or the like. It has the advantage that it can be.

In such a double-tube receiver tank, functional components such as a filter and a dryer are installed above the receiver tank where the gas refrigerant and the liquid refrigerant are separated and the inner and outer tubes communicate with each other. This improves the refrigerant separation performance.

According to the present invention, by providing a filter member in contact with the upper end portion of the inner pipe, foreign substances in the refrigerant are removed before the refrigerant flows between the desiccants installed inside the inner pipe. It can separate clean liquid refrigerant.

Further, since the filter member abutting on the upper end of the inner tube is pressed against the locking member locked on the opening of the receiver tank and is sandwiched between the upper end of the inner tube and the locking member, for example, a bolt It can be assembled in the receiver tank without using other components such as the above, so that complicated processes can be omitted, the number of manufacturing steps can be reduced, and the filter member can be easily replaced.

The invention described in claim 5 of the present application is the invention according to claim 4, wherein the filter member has a double structure of an inner member and an outer member, and the inner member and the outer member have inner and outer members. One or two or more slits for gas-liquid exchange are provided, a filter for removing impurities is sandwiched between the inner member and the outer member, and the filter is pressed and held by the outer member. It is a filter member of the receiver tank having the configuration. As described above, since the filter member of the present invention has a structure in which the filter is sandwiched by the double structure of the inner member and the outer member, it is easy to assemble, and the outer member presses the filter. Therefore, the filter is compressed, and the function of removing foreign substances such as dust can be improved. Further, a slit is provided in the inner member and the outer member so that sufficient refrigerant exchange is performed between the inner tube and the outer tube.

The invention described in claim 6 of the present application is the invention according to claim 4 or 5, wherein the inner member to the outer member constituting the filter member are formed of an elastic member. It is a filter member of the ink.

When the outer member is formed of an elastic member as described above, the filter held between the outer member and the inner member can be overpressed by applying the elastic force of the outer member. As a result, it is possible to improve the assembling stability of the filter member and the dust removing function of the filter.

The invention described in claim 7 of the present application is the invention according to any one of claims 4 to 6, wherein the filter member includes an inner member formed into a cylindrical shape, and an outer member that covers the cylindrical shape. The inner member is provided with an opening at one end of a cylindrical shape, a closing portion for closing the other end, and a contact portion at the opening, which is in contact with an upper end of a receiver tank inner tube. A pressure member that is pressed against the locking member of the receiver tank, wherein the outer member is formed in a shape that covers the cylindrical side surface of the inner member. It is a member.

As described above, when the filter member is formed in a cylindrical shape, and the filter is sandwiched between the filter member and an outer member that covers the outer peripheral side surface of the cylindrical shape, the filter surface is enlarged, and the inner diameter is increased. Even when a filter member is provided on the inner pipe of a receiver tank with a

Demonstrates a function to remove contaminants at least as high as that of conventional filter members. Filter member can be provided.

Further, the contact portion formed on the inner member abuts on the end of the inner pipe of the receiver tank, and the pressing member provided on the closing portion abuts on the locking member, so that the gap between the inner pipe end and the locking member is provided. Since the filter member is sandwiched between the two, the filter member can be provided in the receiver tank without performing complicated assembly using other members such as a bolt.

Further, since the outer member is formed to cover the cylindrical side surface of the inner member, the filter member is formed by a simple assembling process of the inner member, the filter and the outer member. I can do it.

The invention described in claim 8 of the present application is the invention according to claim 7, wherein the outer member of the filter member includes two semi-circular members that cover the outer peripheral side surface of the cylindrical inner member. It is a filter member of a receiver tank having a configuration in which a locking portion is formed at the left and right ends of the two semi-circular members so that the two semi-circular members are unevenly matched.

Thus, the outer member is formed, and the filter is pressed by the outer member by matching the locking portions of the outer member with each other, and is constituted by the inner member, the filter, and the outer member. The filter member can be easily assembled.

The invention described in claim 9 of the present application is the invention according to claim 7, wherein the outer member of the filter member is formed by two semicircular arc-shaped members that cover the outer peripheral side surface of the cylindrical inner member. The receiver tank has a configuration in which each one end of the two semicircular arc-shaped members is joined so as to be bendable, and each other end is provided with a locking portion that matches each other in an uneven shape. As described above, when the outer member is formed, the filter member can be easily formed with the outer member covered from the outer periphery of the inner member and the filter. Can be assembled.

The invention described in claim 10 of the present application is characterized in that, in the invention according to any one of claims 7 to 9, the pressing member provided in the closing portion of the filter member is formed of a member having elasticity. In particular, the present invention is a filter member of a receiver tank having a structure in which an engaging portion of a receiver tank or an absorbing portion for absorbing a pressing urging force generated from an inner tube end of a receiver tank is formed.

As described above, when the pressing member provided on the filter member is formed of a member having elasticity and the absorbing portion for absorbing the pressing urging force is provided, the pressing member is generated in the longitudinal direction of the receiver tank. A filter member is provided between the inner pipe end of the receiver tank and the locking member provided at the outer pipe opening to reduce dimensional errors.

In addition, when the heat exchanger provided with the receiver tank is mounted on a vehicle body, the fluctuation of the pressing force generated by vibration or the like can be absorbed by the absorbing portion, so that the filter member is detached or displaced. Without this, the filter member is held between the inner pipe of the receiver tank and the locking member.

The invention described in claim 11 of the present application is the invention according to any one of claims 4 to 6, wherein the filter member includes an inner member formed in a U-shaped side surface, and an outer cover for the inner member. The inner member has an opening at the end of the U-shaped side surface, and the inner member has an opening at an end of the U-shaped side, and the opening contacts the upper end of the inner pipe of the receiver tank. A contact member, and the outer member is a filter member of a receiver tank having a configuration in which a pressing member abutting on the locking portion is provided in a locking portion direction closing the outer tube opening of the receiver tank. It is.

By forming the inner and outer members in a U-shaped groove shape on the side, the area of the filter surface can be increased and the inner pipe of the double-pipe receiver tank with a small inner diameter is formed. With a filter member Even in such a case, it is possible to provide a filter member having a function of removing contaminants at least as high as that of a conventional filter member.

In addition, if the inner member and the outer member are formed in the same shape with a U-shaped side surface, the filter member can be assembled in a state of being placed over the inner member and the filter, which facilitates assembly. That is, the filter member can be easily formed.

In addition, when the outer member is provided with the pressing member, the outer member is deformed via the pressing member to reduce a dimensional error generated in the longitudinal direction of the receiver tank, and the inner pipe end of the receiver tank is provided. The filter member can be provided between the and the locking member provided in the outer tube opening.

Further, when a heat exchanger provided with the receiver tank is mounted on a vehicle body, fluctuations in pressing force generated by vibration or the like can be absorbed by elastically deforming an outer member via the pressing member. The filter member is held between the inner pipe of the receiver tank and the locking member without being detached or displaced.

The invention described in claim 12 of the present application is the invention according to claim 11, wherein the filter member is provided with a concave locking portion for locking an outer member on the inner member, A filter member of a receiver tank having a configuration in which a member is provided with a convex locking portion that matches the concave locking portion.

As described above, since the inner member and the outer member are provided with the concave locking portion and the convex locking portion that match each other, the filter is pressed against the outer member, and the inner member and the outer member are pressed against each other. The filter member is reliably assembled without the filter and the outer member being displaced or coming off.

The invention described in claim 13 of the present application is the invention according to any one of claims 7 to 12, wherein the abutting portion that abuts on a receiver tank inner pipe provided on an inner member of the filter member includes the following: Inside This is a filter member of a reservoir tank having a closing portion for closely closing a pipe opening.

As described above, if the filter member is provided with the closing portion that closes the opening of the inner tube of the receiver tank, the refrigerant flowing between the inner tube and the outer tube always flows through the filter member and flows into the inner tube. Therefore, the gas-liquid separation function of the receiver tank can be improved.

The invention described in claim 14 of the present application is the invention according to any one of claims 4 to 13, wherein one or two rectangular filters are used as the filter provided in the filter member. It is a finoleta member of the Recino tank.

When a rectangular filter is used in this way, for example, unlike a conventional filter, it is not necessary to cut the filter into a circular shape that matches the internal shape of the receiver tank and use it. No scraps are generated, reducing manufacturing costs

BRIEF DESCRIPTION OF THE FIGURES

【Figure 1 】

It is a front view of the heat exchanger concerning the example of the present invention.

【Figure 2】

FIG. 3 is a front view of a heat exchanger and a cross-sectional view of a receiver tank according to a specific example of the present invention.

[Figure 3]

FIG. 4 is a perspective view of a filter member according to a specific example of the present invention.

[Fig. 4]

FIG. 13 is a perspective view of a filter member according to another embodiment of the present invention.

[Figure 5]

FIG. 8 is a view showing a rib for preventing a desiccant from dropping, which is formed at an inner tube bulging portion of a receiver tank. Three

[Fig. 6]

FIG. 4 is a perspective view showing a filter member according to a specific example of the present invention.

[Fig. 7]

It is a side view which shows the internal holder of a filter member concerning the example of this invention.

[Fig. 8]

FIG. 4 is a plan view showing an outer holder of a filter member according to a specific example of the present invention.

[Fig. 9]

FIG. 4 is a side view showing an outer holder of a filter member according to a specific example of the present invention.

[Fig. 10]

FIG. 5 is a side view showing a filter member according to a specific example of the present invention.

[Fig. 11]

FIG. 9 is a cross-sectional view of a filter member according to another example of the present invention.

[Fig. 1 2]

FIG. 4 is a view showing a state where a filter member is assembled to a receiver tank according to a specific example of the present invention.

[Fig. 13]

FIG. 9 is an exploded perspective view showing a filter member according to another specific example of the present invention.

[Fig. 14]

FIG. 9 is a view showing a state where a filter member is assembled to a receiver tank according to another specific example of the present invention.

[Fig. 15]

FIG. 13 is a view showing a state where a receiver tank is mounted with a capacitor according to a conventional example. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, specific examples of the present invention will be described with reference to the drawings.

Figure 1 shows a front view of the heat exchanger 1 and the receiver tank 2.

As shown in FIG. 1, a plurality of flat tubes 4 and wavy fins 5 are alternately stacked on the heat exchanger 1, and both ends of the stacked flat tubes 4 and 4 are each connected to a header pipe. They are inserted and connected to the tube insertion holes 8, 8. Side plates 9 having a U-shaped cross section are disposed on the upper end and lower end of the laminated flat tubes 4. The openings at the upper and lower ends of the header pipes 6 and 7 are closed by caps 10. In addition, a partition plate 11 is provided at a required portion of the header pipes 6 and 7 to divide it into predetermined compartments in the header pipes 6 and 7. Further, one of the header pipes 6 is connected to the receiver tank 2, and the other header pipe 7 not connected to the receiver tank 2 is provided with an inlet joint 12 and an outlet joint 13. An outlet communication hole 14 and an inlet communication hole 15 for flowing the heat exchange medium are formed in the header pipe 6 connected to the receiver tank 2.

Next, the receiver tank 2 will be described with reference to the drawings. FIG. 2 is a cross-sectional view showing a state inside the receiver tank 2.

As shown in FIG. 2, the receiver tank 2 is a vertically long hermetic container, and this hermetic container is mainly composed of a double pipe of an inner pipe 16 and an outer pipe 17.

The outer pipe 17 is formed in a straight pipe shape having a predetermined diameter and a predetermined length shorter than the header pipes 6 and 7.

The inner tube 16 has at its lower end a bulge portion 18 bulging in the direction of the outer tube 17. The outer diameter of the bulge portion 18 is the same as the inner diameter of the outer tube 17. It is formed to be. Further, the expansion of the inner pipe 16 is performed. The portion above the protruding portion 18 is formed so as to have a diameter slightly smaller than the inner diameter of the outer tube 17. The outer tube 17 is manufactured by rolling a plate of a predetermined size on which a filler is clad by press molding or the like.

Therefore, when the inner pipe 16 is inserted into the outer pipe 17, the bulging portion 18 of the inner pipe 16 is press-fitted or pressed into the inner wall of the outer pipe 17 to form a double pipe structure. The upper portion of the inner tube 16 above the bulging portion 18 is formed to have a diameter slightly smaller than the inner diameter of the outer tube 17, and thus flows between the outer tube 17 and the lower tube 16. Road 19 is formed.

Further, since the lower end of the inner pipe 16 is formed to have a larger diameter than the upper part of the lower end, the inner volume at the lower end is increased, and as described later, the medium in the liquid phase state is formed. To be able to store enough.

Further, the inner pipe 16 and the outer pipe 17 are formed so as to communicate with each other at the upper part of the receiver tank 2.

The upper end opening of the outer tube 17 is closed by a locking member 20a described later, and the lower end opening is closed by a fusible plug 21.

In addition, an inlet 24 communicating with the flow passage 19 is formed in the outer tube 17, and an outlet 25 communicating with the outer tube 17 and the inner tube 16 is formed in the bulging portion 18. Have been. By connecting the inlet / outlet communication holes 14 and 15 and the inlet / outlet portions 24 and 25 by short pipe-shaped connecting members 26 and 27 through which the heat exchange medium flows, the receiver tan is provided. Link 2 to header pipe 6.

The fusible plug 21 closing the opening at the lower end of the outer pipe 17 is a relief valve for releasing abnormal pressure when the pressure inside the receiver tank rises abnormally for some reason. . This relief valve is provided with a through hole in the center of the bolt 21a that communicates with the inside and outside, and solder 21b that melts at 100 ° C to 105 ° C in this hole. A fusible plug 21 called melt bolt 21a having a structure in which the hole is closed.

The fusible plug 2 1 rises pressure inside Reshibata ink reaches the melting temperature corresponding to a pressure of about 3 0 kg / cm ^2, melting the solder 2 lb from the through hole of the Mel preparative por DOO 2 la After flowing, the high-pressure refrigerant inside the tank is released into the atmosphere through this through-hole, and the pressure inside the receiving tank is reduced, whereby the function of the cycle connected to this tank is reduced. It is configured to protect parts.

Next, the locking member 20a for closing the opening at the upper end of the outer tube 17 will be described.

As shown in FIG. 2, an edge member 20 b having a female thread portion 20 c in a ring shape on the inner periphery is attached to the upper end portion of the outer tube 17, and the edge member An engaging member 20a is detachably screwed to 20b. As described above, the locking member 20a for closing the opening at the upper end of the outer tube 17 has a threaded portion that is screwed into the female screw portion 20c formed on the edge member 20b. Plug. Further, the locking member 20a is mounted between the edge member 2Ob and the edge member 2Ob via two O-rings 29, and the upper end opening of the outer tube 17 is kept airtight with the outside air. It is screwed in.

Next, a description will be given of a filter member 22 and a dryer 23 provided at the lower portion of the locking member 20a inside the receiver tank 2 for removing impurities and separating gas and liquid. FIG. 3 is a perspective view of the filter member 22.

As shown in FIGS. 2 and 3, the filter member 22 has a concave portion 22 a that is opened at a lower portion, and an outer peripheral portion of the concave portion 22 a is provided with an upper end portion of the inner pipe 16. A step 22 b corresponding to the opening is formed. Further, a protrusion 22 c protruding upward is formed on the upper surface of the recess 22 a.

The filter member 22 is formed of a resin member such as nylon for ventilation. A hole is formed to form the outer shape, and a member having a function of removing impurities such as felt is sandwiched inside.

The dryer 23 holding the desiccant therein is formed in a bag shape that fits into the recess 22 a of the filter member 22.

The dryer 23 is formed in a bag by a member such as nylon or felt, and holds a desiccant for a refrigerant such as synthetic zeolite, aluminum nagel, silica gel or the like inside the bag. In the filter shown in FIG. 2, a dryer 23 is fitted into the concave portion 22 a of the filter member 22, and heat-sealed or directly sewn to the filter member 22 to form the filter 23. The filter member 22 is integrated. Further, in FIG. 3, the suspension member 23a of the dryer 23 is heat-welded or sewn to the concave portion 22a of the filter member 22, and the suspension member 23a is attached. The dryer 23 is attached to the filter member 22 via the filter.

When the filter member 22 and the dryer 23 are inserted into the receiver tank 2, the dryer 23 is housed inside the inner pipe 16, and the stepped portion 2 2 b of the filter member 22 becomes the inner pipe 16. Abuts the upper end of the

Then, when the locking member 20a is screwed from the upper part of the filter member 22 to the upper end of the outer tube 17 as described above, the locking member 20a is projected from the filter member 22. The filter member 22 and the dryer 23 are held in the receiver tank 2 while the filter member 22 is held between the opening end of the inner pipe 16 and the locking member 20a by pressing the portion 22c. .

For this reason, the filter member 22 is installed in the upper communicating portion between the outer pipe 17 and the inner pipe 16.

That is, the heat exchange medium flowing from the outlet communication hole 14 of the header pipe 6 through the inlet through hole of the receiver tank 2 and flowing into the inside of the receiver tank 2 rises through the flow passage 19 and flows into the upper communication portion. I Through the filter member 22, gas-liquid separation into a single liquid phase by the dryer 22, and is stored in the lower part of the inner pipe 16, and again, the outlet through hole 25 of the receiver tank 2, header pipe, The cooling cycle will be circulated through the inlet communication hole 15 of No. 6.

In this way, when the filter member 22 and the dryer 23 are formed integrally and held inside the receiver tank 2 by the locking member 20a, the aggregated cycle of the receiver tank 2 and the like is reduced. After replacing the filter member 23 and the dryer 23 whose moisture absorption performance has been deteriorated after mounting on the vehicle body, loosen the screw of the locking member 20a from the upper part of the vehicle body and lock the locking member from the receiver tank 2 20a can be removed, and the filter member 22 and the dryer 23 can be easily pulled out from the receiver tank 2 for easy replacement, eliminating the need for complicated work such as diving under the vehicle body as in the conventional case. Work efficiency.

In addition, it is only necessary to replace functional parts having gas-liquid separation performance such as filter members and dryers without replacing the receiver tank or the entire cooling cycle, thereby reducing the cost of replacing functional parts. This allows us to provide products that meet our needs.

In addition, by using the locking member as a closing member for the opening at the upper end of the receiver tank, the number of parts can be reduced, and the manufacturing cost can be reduced.

Further, since the filter and the dryer are provided along the flow path of the heat exchange medium which rises and descends, gas-liquid separation can be performed effectively, and the coagulation effect of the cooling cycle is improved. There is a monkey.

FIG. 4 is a perspective view showing another specific example of the filter member. As shown in FIG. 4, the filter member 28 of the present example has, like the filter member 22, a concave portion 28 a, a step portion 28 b, and a projecting portion 2.

8 c. Further, the filter member 28 is provided with a groove-like recess 28 d and a handle-like drawer 28 e on the upper end plane of the protrusion 28 c. The drawer portion 28 e is formed so as to be folded and stored in the recess portion 28 d when the filter member 28 is attached to the receiver tank 2.

By providing the filter member 28 with the lead-out portion 28e as described above, the filter member and the dryer can be easily pulled out from the receiver tank when the filter and the dryer are replaced with functional parts.

In this example, the filter member, the dryer and the locking member provided in the receiver tube having the double pipe structure are described. However, the filter member, the dryer and the locking member are also provided in the receiver tank having the single pipe structure. By providing the members, these functional components can be easily detachably provided, and the workability of the dryer and the filter can be improved.

FIG. 5 shows a rib 18 a formed integrally with the bulging portion 18 of the inner tube 16. In this example, the ribs 18a are provided in a cross shape to prevent the desiccant from dropping below the bulging portion 18. The shape, the number, the position of the ribs 18a, and the like may be appropriately determined.

FIG. 6 is a perspective view showing another example of the filter member.

The filter member 30 of the present example is formed in a cylindrical shape, and more specifically, is sandwiched between the inner holder 31 as an inner member, the outer holder 40 as an outer member, and the inner and outer members. Filter F that is

FIG. 7 is a side view showing the inner holder 31.

As shown in FIG. 7, the inner holder 31 is formed in a cylindrical shape. A plurality of vertically elongated slits 33 are formed on the cylindrical peripheral side surface 3 2 of the inner holder 31, and a portion of the peripheral side surface 32 is formed. A projection 34 having an uneven shape protrudes from the projection. The cylindrical upper end of the inner holder 31 is closed by a closing plate 35 having a diameter once larger than the diameter of the peripheral side surface 32. An opening is formed at the lower end of the cylindrical shape of the inner holder 31, and a contact portion 36 is formed on the outer periphery of the opening to be in contact with the end opening of the inner pipe 16 of the reservoir tank 2. ing. The contact portion 36 includes a contact plate 36 a having the same diameter as the closing plate 35, and a fitting portion 36 b matching the inner diameter of the inner tube 16. The contact plate 36 a A stepped portion 36 is formed between the inner tube 16 and the fitting portion 36b so as to match the inner and outer diameters of the inner tube 16 and to come into close contact with the inner tube 16. The abutment plate 36a is formed in a hollow ring shape so as not to close the opening, and the refrigerant flows through the slit 33 into and out of the inside. Has become.

Further, on a closing surface 35 a of the closing plate 35, a pressing member 50 described below, which is in contact with a locking member 20 for closing an opening of the outer tube 19 of the receiver tank 2, is provided. .

FIG. 8 is a plan view of the outer holder 40. FIG. FIG. 9 is a side view of the outer holder 40, and FIG. 10 is a side view showing the filter member 30 in a state where the outer holder 40 is assembled to the inner holder 31.

As shown in FIGS. 8 and 9, the outer holder 40 is formed of a flat member made of an elastic resin or the like. The outer holder 140 is formed with two semi-circular portions 41, 42 that cover the peripheral side surface 32 of the inner holder 31, and the two circular portions 41, 42 are bent. They are joined by joining portions 44 formed so as to be possible. A plurality of vertically elongated slits 44 are formed on the circumferential side surfaces of the semicircular arc-shaped portions 41 and 42. FIGS. 8 and 9 show a state in which the joint portion 44 is bent.

Also, at the ends of the semicircular arc-shaped portions 41 and 42, engaging portions 45 and 46 are formed, which are concave and convex so that the ends match each other. That is, the locking portion 45 has concave portions 45 a and 45 c and convex portions 45 b and 45 d formed alternately, and the locking portion 46 has a concave portion 4 of the locking portion 45. Protrusions 46a and 46c are formed at positions facing 5a and 45c, and depressions 46b and 46d are formed at positions facing the protrusions 45b and 45d. ing. That is, the outer holder 40 is formed in a cylindrical shape by fitting the convex portions formed on the locking portions 45 and 46 to each other.

The filter F is formed of a member such as felt, and the felt is formed in a rectangular shape that covers the peripheral side surface of the inner holder 31.

One end of this rectangular filter F is brought into contact with the projection 34 of the inner holder 31, and the peripheral side surface 32 of the inner holder 31 is caused to make a full turn, so that the other end of the filter F is Again touch the projections 3 4. That is, since the filter F has a certain thickness like a felt or the like, the filter F is formed by the projections 34 of the inner holder 31, the closing plate 35, and the contact plate 36a. Positioning has been performed.

After covering the filter F on the peripheral side surface 32 of the inner holder 31, the outer holder 40 is covered, and the locking portions 45, 46 of the outer holder 40 are fitted to each other. Then, the assembly of the filter member 30 is completed.

As described above, the outer member is formed in a shape that covers the cylindrical side surface of the inner member, and the locking portions 45 and 46 are formed. Therefore, the inner holder 31, the filter F and the Outer holder 40 can be easily assembled.

Here, since the outer holder 40 is formed of an elastic member, the elastic force of the outer holder 40 is applied to cover the filter F, and the filter F can be compressed and clamped to some extent. As a result, the filter assembly 30 is stable in assembly and the filter F dust remover. Performance can be improved.

In addition, since the filter F is provided on the peripheral side surface 3 2 of the inner holder 31, the shape of the filter F is a rectangular shape surrounding the peripheral side surface 32, and the internal shape of the receiver tank 2 is different from the conventional case. Since it is not necessary to cut into a circle or the like in accordance with the size, unnecessary production of scraps and the like can be prevented, and the production cost can be reduced.

The outer holder 40 has an example in which two semicircular arc-shaped portions 41 and 42 are joined at a joining portion 44 to be integrated, but as shown in the cross-sectional view of FIG. The outer holder 40 is composed of two semi-circular members 47, 48, and the concave and convex engaging portions 47a fitted to both ends of the semi-circular members 47, 48 respectively. , 48a and 47b, 48b to form the outer holder 40.

Next, a structure in which the filter member 3 ◦ is sandwiched between the inner pipe 16 of the receiver tank 2 and the locking member 20 will be described.

FIG. 12 is a diagram showing an assembling structure of the filter member 30. As shown in FIG. 12, the filter member 30 has a fitting portion 36 b of the contact portion 36 fitted into the inside of the inner tube 16, and a stepped portion 36 c to form the inner tube 16. In close contact with the end of

Further, the pressing member 50 is pressed against the locking member 20 that closes the opening of the outer pipe 17 of the receiver tank 2.

That is, the pressing member 50 formed on the inner holder 31 of the filter member 30 is formed of a member such as an elastic resin, and has a stepped shape 51 a, 5 that expands left and right by one step. 1a is formed. A flat cross-shaped press contact portion 52 that is pressed against the locking member 20 is formed on the uppermost step portion 51 protruding by the step shape.

As described above, when the pressing member 50 is formed in a stepped shape and the pressing member 50 is formed of a member having elasticity, the pressing member 50 is formed stepwise on the left and right. Then, when the press contact portion 52 formed on the protruding portion is pressed, the pressing force can be absorbed by the stepped shape. Therefore, the filter member 30 is pressed against the bottom surface of the locking member 20 and is sandwiched between the inner tube 16 and the locking member 20. Therefore, the filter member 30 can reduce the dimensional error in the longitudinal direction of the receiver tank by the absorbing portion. Further, when the receiver tank 2 is mounted in a vehicle or the like, the fluctuation of the pressing force caused by the vibration can be absorbed by the elastic force of the pressing member 50, and the filter member 30 shifts or comes off. The filter member 30 is held at a predetermined position at the end of the inner tube 16 without being stiff.

By holding the filter member 30 between the inner tube 16 and the locking member 20 in this manner, the inner holder 31 and the outer holder 40 of the filter member 30 are formed. Sufficient refrigerant exchange is performed between the inner pipe 16 and the outer pipe 17 of the receiver tank 2 through the slits 33, 43 provided in the tank, and contaminants in the refrigerant are efficiently removed. To remove clean liquid refrigerant.

Further, the filter member 30 is formed in a cylindrical shape, and a filter for removing impurities is provided on the peripheral side surface 32. Therefore, a relatively large filter surface can be provided, and a single-tube receiver can be provided. Even when the filter member 30 is provided in the inner pipe 16 having a smaller diameter of the receiver tank than the tank, the filter member has a function of removing contaminants at least as high as that of the conventional filter member 30. 30 can be provided.

In addition, the filter member 30 of this example can be held between the inner tube 16 of the receiver tank 2 and the locking member 20 without performing complicated assembly using other members such as bolts. The manufacturing process can be reduced by eliminating complicated labor. In addition, replacement of the filter member is facilitated.

Next, another specific example of the filter member will be described with reference to the drawings. FIG. 13 is an exploded perspective view showing the configuration of the filter member 60. As shown in FIG. 13, the filter member 60 of this example has an inner holder 61 having a U-shaped side surface and a filter. A filter F and an outer holder 70 having a U-shaped side surface and covering the inner holder 61 are provided.

The inner holder 61 has a side surface 62 formed in a U-shape, and an impurity removing portion 64 having front and back surfaces 63 formed along the U-shape. A plurality of slits 65 are formed on the front and back surfaces 63 of FIG.

In addition, a contact portion 66 contacting the inner tube 16 is formed at an end opening of the contamination removing portion 64. The contact portion 66 includes a contact plate 66 a that holds the contamination removing portion 64 and a fitting portion 66 b that matches the inner diameter of the inner tube 16. A stepped portion 66 c is formed between 66 a and the fitting portion 66 b so as to match the inner and outer diameters of the inner tube 16 and to come into close contact with the inner tube 16. A hole 66d is formed in the center of the contact plate 66a, and the hole 66d communicates with the inside and outside of the impurity removing section 64 via the slit. A communication pipe 67 is provided. At the lower end of the U-shaped side surface, a concave locking portion 68 into which a convex locking portion 78 of the outer holder 70 described later is fitted is formed.

The filter F is cut into a rectangular shape and is covered on the front and back surfaces 63 of the foreign matter removing portion 64 of the inner holder 61.

Next, the outer holder 70 will be described. The outer holder 70 has a contaminant removing portion 74 of the same shape that is one size larger than the contaminant removing portion 64 of the inner holder 61. That is, the contaminant removing portion 74 is composed of a U-shaped side surface 72 and front and back surfaces 73, and a plurality of slits 75 are formed on the front and back surfaces 73. Previous A pressing member 80 that is pressed against the engaging member 20 of the receiver tank 2 is provided at the protruding end 73 a of the front and back surface 73. In addition, the U-shaped opening of the contaminant removing section 74 is joined to the contact plate 66 a of the contact section 66 of the inner holder 61, and the contact plate 66 a A bonding plate 76 formed in the same shape is provided. Further, at the lower end of the U-shaped side surface 72, there is provided a convex locking portion 78 having a rectangular projection formed on the concave locking portion 68 of the inner holder 61. .

That is, the inner holder 61, the filter F and the outer holder 70 are provided such that the filter F is covered on the front and back surfaces 63 of the inner holder 61, and the outer holder 70 is covered from the outside. The filter member 60 is assembled by fitting the convex locking portion 78 of the outer holder 70 into the concave locking portion 68 of 61.

The outer holder 70 is formed of an elastic member, and presses and holds the filter F with the outer holder 70.

Since the inner holder 61 is assembled so as to cover the outer holder 70 from above the buinoleta F, the assembling process is simplified.

Further, the filter F is compressed to a certain extent by the elastic force of the outer holder 70 and is sandwiched between the inner holder 61 and the outer holder 70, so that the assembly stability of the filter member 20 is improved. The dust removal function of the filter F can be improved.

In addition, since the filter F is provided on the front and back surfaces 63 of the inner holder 61, a rectangular filter F can be used, and the filter F is formed without generating useless scraps and the like. You.

In addition, since the front and back surfaces along the U-shaped side surface are formed in the contaminant removal portion of the filter member 60, a relatively large filter surface can be formed. The filter member 60 is attached to the inner tube of the receiver tank with a smaller diameter compared to the double tube structure. Even when the filter member is provided, it is possible to provide a filter member exhibiting a function of removing contaminants at least as high as that of a conventional filter member. The structure sandwiched between the inner tube 16 and the locking member 20 will be described.

FIG. 14 is a view showing an assembling structure of the filter member 60. As shown in FIG. 14, the filter member 60 has a fitting 66 b of the contact portion 66 fitted into the inner tube 16, and a stepped portion 66 c formed of the inner tube 16. It comes into close contact with the end.

Further, the pressing member 80 is pressed against a locking member 20 that closes the opening of the outer pipe 17 of the receiver tank 2.

That is, when the pressing member 80 abuts on the locking member 20 of the receiver tank 2 and the abutting portion 76 of the filter member 70 abuts on the inner tube 16, the locking member 20 The pressing force from the end of the inner pipe 16 is transmitted to the protruding end 73 a of the outer holder 70 via the pressing member 80, and from the protruding end 73 a, the front and back surfaces of the outer holder 70. It is diffused to 7 3 and absorbed.

Therefore, the dimensional error in the longitudinal direction of the receiver tank can be reduced to some extent by the filter member 60. Further, when the receiver tank 2 is mounted in a vehicle or the like, the change in the pressing force caused by the vibration can be absorbed by the filter member 60, and the filter member 60 is displaced or detached. Can be avoided.

In this way, the filter member 60 can be sandwiched between the inner tube 16 and the locking member 20, so that the filter member 60 can be connected to the receiver tank without increasing the number of parts. It can be provided.

Further, by providing the filter member 60, the heat exchange medium flows through the slits 65, 75 and the filter F formed in the inner and outer holders 60, 70, and the extra heat is supplied. Clean liquid Refrigerant can be separated.

As described above, the filter member of the present invention is sandwiched between the inner pipe of the double tank structure receiver tank and the locking portion, and performs complicated assembly using other members such as a bolt. Thus, it is possible to assemble without any trouble, and it is possible to reduce the number of manufacturing steps and to easily replace the filter member. Further, according to the structure of the filter member of the present invention, even when the filter member is provided in the inner pipe having a smaller diameter of the receiver tank having the double pipe structure as compared with the receiver pipe having the single pipe, It is possible to provide a filter member having a function of removing contaminants at least as high as that of a conventional filter member.

Further, since the filter member of the present invention has a configuration in which the pressing member is provided, it is possible to absorb the elastic force and to reduce the dimensional error of the header tank in the longitudinal direction. In addition, the vibration load when mounted on the vehicle can be reduced. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention is a receiver tank which facilitates replacement of functional components such as a filter and a driver mounted inside the receiver tank and has improved gas-liquid separation performance, and is particularly suitable for a cooling cycle for automobiles. is there.

Claims

The scope of the claims

1. A receiver tank that has an inlet and an outlet for liquid refrigerant in a vertically long sealed container and stores liquid refrigerant inside.

An opening is formed at the upper end of the receiver tank, and a locking member is detachably locked in the opening and hermetically sealed, and contacts the locking member to remove impurities in the refrigerant. A filter member to

A receiver tank, wherein a dryer provided with a desiccant therein is attached to the filter member.

2. An opening at the upper end of the receiver tank is fitted with a ring-shaped edge member having an internal thread on the inner periphery, and a locking member is detachably screwed onto the edge member. The receiver tank according to claim 1, wherein the receiver tank is worn.

3. Equipped with a liquid refrigerant inlet and outlet in a vertically long sealed container

, In a reservoir where liquid refrigerant is stored inside,

The sealed container is formed by inner and outer double pipes, the upper parts of these double pipes are provided so as to communicate with each other, and the lower part is provided non-communicatively. The outlet portion is provided so as to communicate with a flow passage formed between the double tubes while being inserted, and the outlet portion is provided at the lower end of the double tube and communicates with the inside of the inner tube. A tank tank,

An opening is formed in the upper end of the receiver tank, and a locking member is detachably locked in the opening and hermetically closed. A filter member is provided in contact with the member to remove impurities in the coolant,

A dry tank, wherein a dryer having a drying material provided therein is attached to the filter member.

4. A vertically-elongated dual-tank receiver tank that separates refrigerant in a gas-liquid mixed state and stores the liquid refrigerant after gas-liquid separation inside and the upper part of the outer pipe communicate with each other. At

A filter member that contacts an upper end of the inner pipe and removes impurities in a refrigerant,

The filter member is aligned with the upper end opening of the inner pipe of the receiver tank and abuts on the end of the inner pipe, and the other end is pressed against the locking member which is locked in the upper end opening of the outer pipe of the receiver tank. And a filter member for the receiver tank, the filter member being held between the inner tube and the locking member.

5. The filter member forms a double structure of an inner member and an outer member,

The inner member and the outer member are provided with one or two or more slits for performing internal and external gas-liquid exchange,

2. The filter for a receiver tank according to claim 1, wherein a filter for removing contaminants is sandwiched between the inner member and the outer member, and the filter is pressed and held by the outer member. Element.

6. The filter member for a receiver tank according to claim 4, wherein the inner member to the outer member constituting the filter member are formed of members having elasticity.

7. The filter member is formed in a double structure of an inner member formed in a cylindrical shape, and an outer member covering the cylindrical shape, wherein the inner member has an opening at one end of the cylindrical shape, and the like. A closing portion for closing an end portion is provided; a contact portion that contacts the upper end of the inner pipe of the receiver tank at the opening; and a pressing member that is pressed against a locking member of the receiver tank at the closing portion.

The filter member according to any one of claims 4 to 6, wherein the outer member is formed in a shape to cover a cylindrical side surface of the inner member.

8. The outer member of the filter member is formed of two semicircular members that cover the outer peripheral side surface of the cylindrical inner member, and the two semicircular members are formed at the left and right ends of the two semicircular members. 8. The filter member for a receiver tank according to claim 7, wherein a locking portion is provided in which the two semicircular arc-shaped members match the unevenness.

9. The outer member of the filter member is formed with two semi-arc members that cover the outer peripheral side surface of the cylindrical inner member, and one end of each of the two semi-arc members is bent and joined. 8. The fin roller member according to claim 7, wherein a locking portion is provided in which each of the other end portions has an uneven shape and is matched with each other.

10. The pressing member provided in the closing portion of the filter member is formed of an elastic member, and the pressing urging force generated from the locking portion of the receiver tank or the inner tube end of the receiver tank. The filter member for a receiver tank according to any one of claims 7 to 9, wherein an absorbing portion for absorbing the water is formed.

1 1. The filter member is formed in a double structure of an inner member formed in a side U-shape, and an outer member formed in a side U-shape that covers the inner member,

The inner member has a side surface provided with an opening at a U-shaped end portion, and the opening portion provided with a contact portion that contacts an upper end of a receiver tank inner pipe,

7. The outer member according to claim 4, wherein a pressing member that abuts on the locking member is provided in a direction of the locking member that closes an outer tube opening of the receiver tank. RESINO “Filter material for tanks.

12. The filter member is provided with a concave locking portion for locking the outer member on the inner member.

10. The receiver tank according to claim 10, wherein the outer member is provided with a convex locking portion that matches the concave locking portion. Finale members.

13. A contact portion provided on the inner member of the filter member and in contact with the inner tube of the receiver tank is provided with a closing portion for tightly closing the opening of the inner tube. A filter member for a receiver tank according to any one of claims 7 to 12.

14. The filter of the receiver tank according to any one of claims 4 to 13, wherein one or two filters having a rectangular shape are used as the filter provided on the filter member. Element.