JPH0886539A - Refrigerant transferring connector - Google Patents

Abstract

PURPOSE: To improve the mounting at an expansion valve with a controller and the accuracy and the operability of piping and to obtain a low-cost connector having high accuracy of a connecting surface and a light weight. CONSTITUTION: First and second through holes 32, 33 parallel with each other and opened at first and second connecting surfaces 30, 31 parallel with each other are provided in a connector body 29 made of synthetic resin having the surfaces 30, 31. Further, thinned parts 36 are provided at the parts of the surface 30 side out of the holes 32, 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The refrigerant transfer connector of the present invention is
For example, it is used to connect an expansion valve with a controller incorporated in an air conditioner for an automobile to a downstream end of a pipe communicating with a refrigerant outlet of a condenser and an upstream end of a pipe communicating with a refrigerant inlet of a compressor.

[0002]

2. Description of the Related Art Conventionally, as an expansion valve in an air conditioner for an automobile, there is built-in adjusting means for adjusting the opening degree of the valve body of the expansion valve according to the temperature of the refrigerant passing through the evaporator. An expansion valve with a controller (also referred to as an integrated expansion valve) having a refrigerant intake port communicating with the expansion valve and a refrigerant discharge port communicating with the temperature-sensing part of the adjusting means in a portion is disclosed in Japanese Utility Model Laid-Open No. 58-49168. Known by.

As shown in FIG. 9, an expansion valve 1 with a controller comprises a housing 2 which constitutes the expansion valve itself. The housing 2 is provided with an inlet-side passage 3 and an outlet-side passage 4 that are parallel to each other, and a central hole 5 that connects these passages 3 and 4 to each other. The inlet side passage 3 is provided with an adjusting means 6 and the outlet side passage 4 is provided with a temperature-sensing portion 7, and the opening degree of the expansion valve is adjusted by interlocking the adjusting means 6 and the temperature-sensing portion 7. It has become.

The adjusting means 6 has a valve seat member 8 for partitioning the inlet passage 3 and a through hole 9 formed in the valve seat member 8.
A valve body 10 that moves in and out of the through hole 9 to adjust the opening degree, a valve rod 11 having one end connected to the valve body 10 and the other end connected to the temperature sensing unit 7, and a closing direction of the valve body 10. The valve body 10 adjusts the opening of the through hole 9 as the temperature sensing portion 7 moves up and down.

The temperature-sensing section 7 includes a temperature-sensing cylinder 13 arranged across the outlet passage 4, a spring 14 for restricting the vertical movement of the temperature-sensing cylinder 13, and a temperature-sensing cylinder 13. It has a conduit 15 communicating with it, and a mushroom-shaped bag body 19 whose interior is partitioned by a diaphragm 16 into an upper chamber 17 and a lower chamber 18. The upper chamber 17 of the bag body 19 has the conduit 15
Communicates with the temperature sensitive tubular body 13. Also, this upper chamber 1
Gas is sealed inside 7 and the gas expands and contracts according to the temperature sensed by the temperature-sensitive tubular body 13, and the temperature-sensitive tubular body 13 itself moves up and down due to the film movement of the diaphragm 16. ing. The lower chamber 18 of the bag body 19 communicates with the outlet side passage 4, and the lower end of the central hole 5 is sealed so as to cut off the communication between the inlet side passage 3 and the outlet side passage 4.

Pipes for transferring the refrigerant to the expansion valve with controller 1 configured as described above are the first and second pipes 20 and 2.
It consists of 1. One end (the right end in FIG. 9) of the first pipe 20 is one side surface of the housing 2 (the left side surface in FIG. 9).
And is directly screwed into and connected to a screw hole 3a as a refrigerant intake port of the inlet side passage 3 of the housing 2. The other end of the first pipe 20 communicates with a refrigerant outlet of a condenser (not shown) via a liquid tank (not shown) that separates the refrigerant into gas and liquid. Further, one end of the second pipe 21 communicates with a refrigerant inlet of a compressor (not shown). The other end (right end in FIG. 9) of the second pipe 21 is directly screwed into and connected to a screw hole 4a as a refrigerant delivery port of the outlet side passage 4 of the housing 2. Further, one end (left end in FIG. 9) of the third pipe 23 is screwed into and connected to the opening edge portion of the inlet side passage 3 on the other side surface (right side surface in FIG. 9) of the housing 2. There is. The other end of the third pipe 23 (the right end in FIG. 9) communicates with the refrigerant inlet of the evaporator 22.
Further, one end (the left end in FIG. 9) of the fourth pipe 24 is screwed into and connected to the opening side of the outlet side passage 4 on the other side surface. The other end (right end in FIG. 9) of the fourth pipe 24 communicates with the refrigerant outlet of the evaporator 22. Therefore, the housing 2 has the first and second pipes 2.
It also serves as a connector for connecting 0 and 21 to the third and fourth pipes 23 and 24, respectively.

Further, in Japanese Utility Model Laid-Open No. 58-49168, as shown in FIG. 10, one side surface (left side surface in FIG. 10) of the housing 2 of the expansion valve with controller 1 has the above-mentioned first structure. Block body 2 integrally provided with a pipe 20 and a second pipe 21
5, and the block body 26 having the third pipe 23 and the fourth pipe 24 on the other side surface (right side surface in FIG. 10).
The structure in which the block bodies 25 and 26 are fastened and fixed to the housing 2 through the bolts 27, and the block bodies 25 and 26 also serve as connectors.

[0008]

However, among the conventional connectors described above, in the structure shown in FIG. 9, the first and second pipes 20 and 21 are directly connected to the opening side end portions of the passages 3 and 4 of the housing 2. Since they are screwed in, there is a problem that the reliability of screwing in and the workability are poor and the pipes are twisted.
Further, in the connector structure shown in FIG. 10, each block body 25, 26 is used, and each block body 2 is used.
Since 5 and 26 are integrally connected by the common bolt 27, it is more troublesome than individual mounting, and it is not always sufficient in terms of weight reduction, workability, cost and the like. The refrigerant transfer connector of the present invention has been invented in view of the above circumstances.

[0009]

The refrigerant transfer connector of the present invention, like the previously known refrigerant transfer connector, allows the refrigerant to be sent to the evaporator to pass therethrough to rapidly expand the refrigerant. An expansion valve for, and a temperature-sensing part, which has a built-in adjusting means for adjusting the opening degree of the expansion valve according to the temperature of the refrigerant passing through the evaporator detected by the temperature-sensing part An expansion valve with a controller, which has a refrigerant inlet opening to the expansion valve and a refrigerant outlet opening to the temperature-sensing portion of the adjusting means, a downstream end of the first pipe leading to the refrigerant outlet of the condenser, and a refrigerant intake opening of the compressor. It is used to connect with the upstream end of the second pipe leading to.

In particular, in the refrigerant transfer connector of the present invention, a main body made of synthetic resin and having first and second connecting surfaces parallel to each other, and provided inside the main body in parallel with each other. One, the first through the second through-holes having both ends open to the second connecting surface, and the first and second through-holes in at least one of the connecting surfaces. These first and second through holes are provided with a meat-thief portion provided in a recessed state in the axial direction, the expansion valve with controller and the first,
It is characterized by having a hole for screwing or inserting a screw for connecting to the second pipe.

[0011]

Since the refrigerant transfer connector of the present invention is made of synthetic resin and has a simple shape as described above, it is lightweight and has excellent workability, and the size and shape during and after molding are stable and the connecting surface is stable. The accuracy of can be improved.

[0012]

Embodiments of the refrigerant transfer connector of the present invention will be described below. In the illustrated embodiment, the same parts as those of the conventional structure described above are designated by the same reference numerals,
Also, some illustrations and descriptions of the structurally overlapping portions are omitted.

FIG. 1 is a schematic view of a refrigerant transfer system piped by a connector of the present invention. 1 is an expansion valve with a controller, 20 is a first pipe, 21 is a second pipe, 28 Is a connector for transferring a refrigerant, and 20a and 21a are the above-mentioned first and
In order to fix the second pipes 20 and 21 to the connector 28, a flange-shaped pressing metal member fixed to the outer peripheral surface of the end of each pipe 20, 21 is provided, 22 is an evaporator, 23 is a third pipe, 24
Is the fourth pipe. The controller-equipped expansion valve 1 has an unillustrated expansion valve, a temperature-sensing section, and adjusting means for adjusting the opening degree of the expansion valve, which are built-in inside the housing 2 like the conventional one shown in FIG. Is provided with a refrigerant inlet and a refrigerant outlet. One end of the first pipe 20, which is an upstream end, communicates with a refrigerant outlet of a condenser (not shown) via a liquid tank (not shown). This liquid tank separates the gas and liquid of the refrigerant. Furthermore, this liquid tank is equipped with a desiccant, and absorbs water in the refrigerant. On the other hand, the other end which is the downstream end (the right end in FIG. 1) is connected to the refrigerant intake port of the first through hole 32 of the connector 28. The second pipe 21 has one end, which is the downstream end, communicates with the refrigerant suction port of the compressor (not shown), and the other end (the right end in FIG. 1) that is the upstream end is the second through hole 33 of the connector 28. It is connected to the refrigerant outlet. The controller-equipped expansion valve 1 and the evaporator 22 are connected by third and fourth pipes 23 and 24. Therefore, the refrigerant sent from the condenser is transferred to the evaporator 22 through the first pipe 20, the expansion valve with controller 1 and the third pipe 23. The refrigerant passing through the evaporator 22 is sent out to the compressor through the fourth pipe 24, the expansion valve with controller 1 and the second pipe 21.

The connector 28 of the present invention is made of synthetic resin,
It is formed in an oval shape having first and second connecting surfaces 30 and 31 which are parallel to each other and has a desired thickness. Of these, the second connecting surface 31 is the expansion valve with controller. 1 is closely attached to one side surface (left side surface in FIG. 1), and a bolt (not shown)
It is fixed through. Main body 29 of the connector 28
As shown in FIGS. 2 to 3, first and second through holes 32 and 33 are provided in the inside thereof in parallel with each other. Both ends of both through holes 32 and 33 are open to the first connecting surface 30 and the second connecting surface 31. Moreover, since the end portions of the first pipe 20 and the second pipe 21 are inserted into the open end portions of the through holes 32 and 33 in a part of the first connection surface 30, the diameter is slightly larger. Insertion portions 34 and 35 are formed respectively.

Further, on the side of the first connecting surface 30 and at the portion deviated from the first and second through holes 32 and 33, a meat stealing portion 36 is provided, and an axial direction of each of the through holes 32 and 33 ( 1, 3
It is provided in a state of being recessed in the left and right direction. Further, in the illustrated embodiment, the main body 2 is provided at the bottom of the meat stealing portion 36.
Ribs 37, 37 for reinforcing the entire 9 are provided. In the case of this embodiment, a plurality of ribs 37, 37 are provided at the upper portion, middle portion and lower portion of the meat stealing portion 36, respectively.
The ribs 37, 37 on the upper portion of the meat stealing portion 36 are provided at intervals of 30 degrees around the central axis of the second through hole 33.
Further, the ribs 37, 37 in the middle portion of the meat stealing portion 36 are also spaced by 30 degrees around the center axis of either hole 38, 38 around a pair of left and right bolt insertion holes 38, 38 described later. It is provided in. Also, ribs 37 at the bottom of the meat stealing portion 36,
The holes 37 are provided around the first through hole 32 or the screw hole 45 described later at intervals of 30 degrees with the center axis of either hole 32, 45 as the center. The length dimension of these ribs 37, 37 (the dimension across the left-right direction in FIGS. 3 and 4) is equal to the depth dimension H (FIG. 3) of the meat steal portion 36, as shown by the solid line a in FIG. As shown by the broken line b in FIG. 3, it is half the depth dimension H. Further, the edges of the ribs 37, 37 are arcuate, and the edges are inclined toward the center of the meat stealing portion 36 as it goes toward the back of the meat stealing portion 36. The ribs 37, 37 are provided when a so-called sink mark occurs during injection molding or when the connector is used in a vehicle having a large vibration or heat load. The ribs 37, 37 can be omitted when there is no risk of sink marks or when the vehicle is used in a vehicle having a small vibration or heat load. Also rib 3
The arrangement, shape, and size of 7, 37 are not limited to those described above, and other arrangements, shapes, and sizes can be used as long as they can prevent the occurrence of sink marks, and eliminate the adverse effects caused by vibration and heat load. 2, 38 and 38 are bolt insertion holes for fixing the connector 28 to the expansion valve with controller 1, and 45 and 45 are screw holes for screwing the screws for fixing the holding metal fittings 20a and 21a. Is.

The connector 28 formed as described above is connected to the expansion valve with controller 1 by a bolt inserted through the bolt insertion holes 38, 38, and connects the first and second pipes 20, 21. At this time, the end portions of the first and second pipes 20 and 21 are inserted into the insertion portions 34 and 35, and the pressing metal fitting 20 is inserted.
The a and 21a are fixed to the main body 29. Each pipe 20, 2
Sealing between the outer peripheral surface of the end portion 1 and the inner peripheral surfaces of the insertion portions 34 and 35 is performed by an O-ring (not shown). When the connector 28 assembled in the refrigerant passage is used, the refrigerant (HFC134a or CFC12) and the compressor oil (APG oil) circulate at high temperature and high pressure. Therefore, as the synthetic resin forming the connector 28, for example, polyphenylene which is known as a resin having refrigerant resistance, oil resistance, solvent resistance, gas permeation resistance, and having little deformation and shrinkage during processing. Sulfide (PPS), PPS containing a reinforcing material such as glass fiber or filler, aromatic nylon, nylon 66, polyamide or the like is used.
As the molding method, injection molding or gas injection molding is used.

Next, FIGS. 5-6 show the connector 28 of the present invention.
2 shows a second embodiment of In the present embodiment, the protruding portions 39, 40 projecting from the peripheral portions of the first and second through holes 32, 33 on the opening sides at both ends, as compared with the peripheral portions thereof.
Are formed respectively. In this embodiment, since the areas of the peripheral portions of the openings of the first and second through holes 32, 33 where the pressing fittings 20a, 21a are in contact are small,
The plane accuracy of the portion to be brought into close contact with the press fittings 20a, 21a is improved. Other configurations and operations are similar to those of the above-described first embodiment. 5 to 6 showing the present embodiment, the ribs 37, 37 in the first embodiment are not drawn, but like the first embodiment, when a sink mark occurs during injection molding, When the connector is used in a vehicle having a large vibration or heat load, similar ribs are provided in this embodiment.

7-8, the connector 28 of the present invention is shown.
3 shows the third embodiment. In this embodiment, the metal pipes 41 and 42 are inserted into the first and second through holes 32 and 33, respectively, to increase the rigidity of the whole. 4 in FIG.
Reference numerals 3 and 44 are annular projections, and the expansion valve with controller 1 (see FIG. 1)
At the time of coupling with, the end portion of the inlet side passage 3 (FIG. 1) and the end portion of the outlet side passage 4 (FIG. 1) are respectively inserted. In this embodiment, the rigidity of the connector 28 itself is increased, and at the same time, the size and shape are stable. In the illustrated embodiment, the metal pipe 41,
Although 42 is insert-molded, it may be mounted after the main body 29 is molded and fixed by caulking to be integrated. Also, the ribs 37, 37 are formed in the same manner as in the first and second embodiments when sink marks occur during injection molding or when this connector is used in a vehicle with a large vibration or heat load, and otherwise. Can be omitted. Other configurations and operations are similar to those of the above-described second embodiment.

[0019]

EFFECT OF THE INVENTION Since the refrigerant transfer connector of the present invention is constructed as described above, it is significantly lighter than the conventional metal product made by casting, shaving, etc., and can be easily manufactured at low cost. Of course, a highly accurate product can be obtained without requiring a lot of secondary processing after molding. Further, since the connector itself is attached to the expansion valve with controller by itself, the attachment is easy and the workability can be improved. Further, since the meat stealing portion is formed, the weight can be further reduced, and at the same time, the material can be saved and the shape accuracy and the dimensional accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a refrigerant transfer path piped by a connector of the present invention.

FIG. 2 is a side view showing the first embodiment of the connector of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an enlarged view of the rib viewed in the direction of arrow a in FIG.

FIG. 5 is a side view showing a second embodiment of the connector of the present invention.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is a side view showing a third embodiment of the connector of the present invention.

8 is a cross-sectional view taken along line CC of FIG.

FIG. 9 is a cross-sectional view of essential parts showing an expansion valve with a controller and a refrigerant system path including a conventional connector structure of a first example.

FIG. 10 is a cross-sectional view of a main part of an expansion valve with a controller including a conventional second example connector structure.

[Explanation of symbols]

 1 expansion valve with controller 2 housing 3 inlet side passage 3a screw hole 4 outlet side passage 4a screw hole 5 central hole 6 adjusting means 7 temperature sensing part 8 valve seat member 9 through hole 10 valve body 11 valve rod 12 spring 13 temperature sensing Cylindrical body 14 Spring 15 Conduit 16 Diaphragm 17 Upper chamber 18 Lower chamber 19 Bag 20 First pipe 20a Holding fitting 21 Second piping 21a Holding fitting 22 Evaporator 23 Third piping 24 Fourth piping 25 Block body 26 Block Body 27 Bolt 28 Connector 29 Main body 30 First connection surface 31 Second connection surface 32 First through hole 33 Second through hole 34, 35 Insertion portion 36 Meat steal portion 37 Rib 38 Bolt insertion hole 39, 40 Projection Part 41, 42 Metal tube 43 44 Annular protrusion 45 Screw hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuichi Kaiya 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Co., Ltd.

Claims (4)

[Claims] 1. An expansion valve for allowing a refrigerant to be sent to an evaporator to rapidly expand the refrigerant, and a temperature-sensing portion having a temperature of the refrigerant passing through the evaporator which is detected by the temperature-sensing portion. According to the expansion with a controller, a control means for adjusting the opening degree of the expansion valve is built in, and a refrigerant intake port communicating with the expansion valve and a refrigerant delivery port communicating with the temperature sensing part of the control means are formed on the side surface thereof. In the refrigerant transfer connector for connecting the valve and the downstream end of the first pipe communicating with the refrigerant outlet of the condenser and the upstream end of the second pipe communicating with the refrigerant inlet of the compressor, the connectors are made of synthetic resin and are mutually A main body having parallel first and second connecting surfaces, and parallel to each other inside the main body, the first and second connecting surfaces having their both ends opened. At least one through-hole A part of the connection surface of the first and second through holes, a meat-thief portion provided in a recessed state in the axial direction of the first and second through holes, and the control described above. A refrigerant transfer connector having a hole for screwing or inserting a screw for connecting the expansion valve with a device and the first and second pipes. 2. The part of the first and second connection surfaces, wherein the peripheral edge portions of both end openings of the first and second through holes project more than the peripheral portion of the peripheral edge portions. Refrigerant transfer connector. 3. The refrigerant transfer connector according to claim 1 or 2, wherein a metal tube is inserted inside the first and second through holes. 4. The refrigerant transfer connector according to claim 1, wherein the main body is made by gas injection molding.