JPS6162771A - Liquid receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a receiver used in a cooling, refrigeration, and air conditioning (hereinafter simply referred to as air conditioning) device, and particularly to a receiver for an automobile cooling device (car cooler).

In general, an air cooling N device is composed of equipment as shown in FIG.

The refrigerant in the receiver 1 is throttled and expanded by the expansion valve 2, and then evaporated under isothermal and pressure conditions in the evaporator 3 to remove heat from the outside.Then, it is adiabatically compressed by the pressure 1 [(compressor) 4 and condensed. It is isobarically cooled and condensed in a condenser (condenser) 5 and returns to the receiver 1.

Receiver 1 is a container where liquefied cold tofu is temporarily stored.
Since the required amount of refrigerant constantly changes depending on outside air conditions, operating conditions, etc., the system is designed to have a function to cope with load fluctuations. Generally, the receiver also has the function of removing moisture and dirt contained in the refrigerant.

Generally, the structure of the receiver is as illustrated in FIG.
Tank 6, refrigerant lower, refrigerant outlet 8, sight glass (inspection window) 9, pipe 10. It comprises a strainer 11 and a moisture absorbent (drying agent) 12, and the amount of refrigerant 13 increases or decreases depending on the operating state.

Conventionally, the material of this receiver was often made of steel, which caused the following problems.

(1) When moisture enters Freon, which is mainly used for cold storage, it hydrolyzes, producing hydrochloric acid and hydrofluoric acid, which corrode steel.

(2) Painting is required to prevent external corrosion.

(3) It is heavy.

For this reason, in recent years, aluminum-made products have been mainly used as the countermeasures in (1) above, but they have the drawback of significantly increasing manufacturing costs.

The present inventors have improved the drawbacks of conventional products and developed a refrigerant that is free from corrosion caused by hydrochloric acid and the like.

As a result of various studies on a liquid receiver that has chemical resistance to oil, can be formed with a thin tank wall, is lightweight, has resistance to fluorocarbon permeation, and has sufficient strength and airtightness. 1. The present invention has been completed.

Next, the present invention will be explained based on examples showing preferred examples of the present invention. FIG. 3 is a sectional view showing an embodiment of the liquid receiver of the present invention.

The receiver tank according to the present invention, as shown in FIG.
After the tank head 14 and the tank bottom 15 are each molded from resin, the ends of the tank head 14 and the tank bottom 15 are joined together at the section A in the figure.

The central pipe 16 is integrally molded with the tank head 14, and the threaded portions of the refrigerant port 17 and the refrigerant outlet 18 can be directly molded or metal inserts can be used.

The above joining method may be selected according to the type of resin and usage conditions, but in consideration of productivity and reliability, ultrasonic welding, high frequency welding, vibration welding, single rotation welding, etc. are preferable. The optimum position and shape of the part should be selected depending on the welding method and usage conditions.

A sight glass is installed in section B shown in Fig. 3 above the tank/rad 14 so that the state of the refrigerant inserted into the receiver can be visually observed. A glass 19 is inserted into the groove of the head of the tank after forming the lid 14, and a cap 20 made of wood is joined from 1 of the side glass 19 to the tank head 14 and fixed.

This cap 20 may be provided with a through hole 21 as shown in FIG. 3, but the entire cap 20 may be made of highly transparent methacrylic resin or the like.

At the time of joining, it is desirable to use a sealing part (not shown) such as an O-ring between the sight glass 19 and the tank rad 14 in order to improve the sealing performance of the refrigerant.

Regarding the sight glass: In the above example, the cap is attached to the tank head for use, but in the present invention, taking advantage of the fact that the liquid receiver body is made of resin, the sight glass is installed as shown in Fig. 4. 19 into the groove of the tank head 14, and attach it to the tank made of resin using a method such as ultrasonic welding.
Caulk the 4 ends and attach the sight glass 19 to the tank.
4. It may be fixed to the upper part.

In this case, as shown in FIG. 5, the cap can be omitted.

In addition, the strainer 22 and the moisture absorbent 23 are connected to the tank rad 14.
It is necessary to incorporate the tank bottom 15 before joining the tank bottom 15.

Although the type of resin used for molding in the present invention is not particularly limited, it is preferable to use polyamide resins such as nylon 66 and nylon 6, polybutylene tereftate, and each reinforcing grade. Further, the inventors of the present invention found that a polyamide 66 resin reinforced by containing an inorganic filler is most suitable.

That is, the resin specifically exemplified above has mechanical strength that can withstand high refrigerant pressure at internal and external temperatures that occur during operation, chemical resistance to fluorocarbons and oil, and resistance to fluorocarbon permeation. It has been found that when the tank bottom 14 and tank bottom 15 are joined to form the receiver body, sufficient strength and airtightness can be obtained in the joint, and reinforced polyamide in particular has high strength and excellent properties at high temperatures. It has good creep resistance and good chemical stability, making it suitable as a resin for molding liquid receivers.It has been found that it is possible to reduce tank wall thickness and to obtain satisfactory results in joining using ultrasonic welding, high-frequency welding, etc. Ta.

The mixing ratio of crow m female to polyamide 606 is 5~
Specific examples of the inorganic filler include talc, clay, kaolin, wollastonite, and mica, and the mixing ratio with respect to polyamide 6-6 is 5 to 65% by weight. , preferably 10-6
When both are used in combination, the total amount is 5 to 65% by weight, preferably 10 to 60% by weight. When it deviates from these ranges, problems arise in the mechanical strength withstanding the residual refrigerant pressure, the strength of the joint, the airtightness, etc.

If a thermal stabilizer is further mixed into the resin (including reinforced resin), it will be even more advantageous under high temperature conditions.

As described above, according to the present invention, a cooling device, a freezing device, an air conditioner (
A product suitable as a refrigerant receiver for air conditioning equipment is obtained,
The receiver body is made of resin, and in particular, the receiver body is divided into two parts, and the head part and bottom part are each integrally molded with resin, and are joined together, so the head part and the bottom part can be easily connected. Furthermore, by making the cap made of resin, it is easy to join the cap and the head part, but by making the liquid receiver body made of resin, as shown in Figs. 4 and 5, Ni Kya.

It is possible to install the sight glass without using plastic, and by choosing a particularly reinforced polyamide for the resin,
It was possible to obtain a suitable liquid receiver for refrigerant as described above, which is light, does not suffer from corrosion due to refrigerant, and has excellent mechanical strength.

Although the invention made by the present invention has been specifically explained above using Examples, the present invention is not limited to the above-mentioned Examples, and various changes can be made without departing from the gist thereof.
Needless to say, it is.

For example, in the embodiment described above, the sight glass, moisture absorbent, and strainer are incorporated into the liquid receiver body, but these may be provided as separate devices (separate members) outside the liquid receiver body.

Further, in the present invention, in addition to the sight glass, moisture absorbent, strainer, etc. shown in the above embodiments, other members constituting the liquid receiver may be provided as necessary.

Generally speaking, the pipe is preferably molded integrally with the tank head from resin as in the above embodiment, but it may also be constructed from other materials or attached as a separate component.

Although the present invention has been mainly described above with respect to a liquid receiver for refrigerant in an automobile air-conditioning system, the present invention is not limited thereto and can be applied to other similar cooling, refrigeration, and air-conditioning systems.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an example of a cooling device, Fig. 2 is a sectional view showing a conventional example, Fig. 3 is a sectional view showing an embodiment of the present invention, and Fig. 4 is an explanatory diagram of a method of installing a sight glass in the present invention. , 5th
The figure is a sectional view showing another embodiment of the present invention. 1...Liquid receiver (receiver) 14--・Tank head (head 0) 15・φφ tank bottom (bottom part) +6--Pipe 19e#・Sight glass 20...Leather jacket 22...Strainer 23 ... Moisture absorbent patent applicant Yoshihiro Sato, patent attorney for Showa Denko K.K. Figure 8 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A liquid receiver for a refrigerant in a cooling refrigeration and air conditioning system, which includes a liquid receiver body made of resin, a pipe built into the liquid receiver body, and a pipe built into the main body or external to the main body. 1. A refrigerant receiver for a cooling, refrigeration, and air conditioner, comprising a sight glass, a moisture absorbent, and a strainer, which are provided as separate components. 2. The liquid receiver according to claim 1, wherein the liquid receiver main body is divided into a head part and a bottom part, and the head part and the bottom part, each molded from resin, are joined. . 3. The liquid receiver according to claim 1 or 2, wherein the resin is polyamide 6.6 resin containing 5 to 65% by weight of glass fiber and/or inorganic filler.