JP2963801B2 - Liquid tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid tank connected in the middle of a high pressure pipe between a condenser and an expansion valve for temporarily storing a circulating refrigerant in a liquid state in a refrigeration cycle.

[0002]

2. Description of the Related Art The tank body of a conventional liquid tank is
Both the tank for storing the refrigerant and the connection block for covering the tank and connecting other components are made of metal, and both are connected by caulking or welding.

[0003]

However, the connection block is generally complicated in shape, and it is necessary to machine the connection portion with the piping and the connection portion with the pressure switch.
The parts cost is considerably high.

Accordingly, an object of the present invention is to provide an economical liquid tank that can greatly reduce the cost of parts.

[0005]

In order to achieve the above-mentioned object, a liquid tank according to the present invention comprises a liquid tank between a condenser and an expansion valve for temporarily storing a circulating refrigerant in a liquid state in a refrigeration cycle. The tank body of the liquid tank connected in the middle of the high-pressure pipe, a metal tank for storing refrigerant, and a synthetic resin for covering the opening of the tank and connecting other parts It is characterized by being formed by a connection block and a metal reinforcing member for reinforcing an engagement portion between the tank portion and the connection block.

A liquid tank according to the present invention is a liquid tank connected to a high pressure pipe between a condenser and an expansion valve for temporarily storing a circulating refrigerant in a liquid state in a refrigeration cycle. The main body is formed of a single piece of metal pipe material having both ends formed by drawing to have a small diameter, and the high-pressure pipe is connected to openings of the drawing portions at both ends. In addition, a connection member for connecting the refrigerant outlet hole of the tank portion and the high-pressure pipe is provided, and the sight glass for looking inside the discharge pipe connected to the refrigerant outlet hole in the liquid tank is connected to the connection member. It may be attached to.

[0007]

An embodiment will be described with reference to the drawings. FIG.
FIG. 2 is a plan view of a first embodiment of a liquid tank connected in the middle of a high-pressure pipe between a condenser and an expansion valve to temporarily store a circulating refrigerant in a liquid state in a refrigeration cycle,
1 is a sectional view taken along the line II, and FIG. 2 is a sectional view taken along the line II-II.

The tank body of the liquid tank has a bottomed cylindrical metal tank portion 11 for storing a refrigerant,
A connection block 12 made of a synthetic resin for covering the opening at the upper end of the tank portion 11 and connecting the high-pressure pipes 21 and 22 and the pressure switch 23;
It is formed by a metal reinforcing member 13 for reinforcing an engagement portion between the second and the tank portion 11.

The connection block 12 is a bead 11a formed by caulking at an upper end edge of the tank portion 11 bent inward and forming a neck on the upper surface of the tank portion 11 inward.
Pressed against and firmly fixed. An O-ring 14 for sealing is mounted between the outer periphery of the connection block 12 and the inner surface of the tank 11. The beads 14 prevent the tank portion 11 from spreading due to the internal pressure, and secure the sealing property of the O-ring 14 portion.

However, if a large force such as caulking is directly applied to the connection block 12 made of a synthetic resin, the connection block 12 will be damaged. A reinforcing member 13 made of a metal sheet is placed, and caulking and fixing is performed on the reinforcing member 13 by the upper edge of the tank 11.

A desiccant 2 for adsorbing water mixed in the refrigerant is disposed between the filter 3 for filtering dust and the like in the upper part of the tank 11.

1 and 3 shown in FIGS.
Are refrigerant inlet holes and refrigerant outlet holes to which the high pressure pipes 21 and 22 are connected, and are formed on the upper surface of the connection block 12. Reference numeral 33 denotes a discharge pipe attached to the lower surface of the connection block 12 so as to communicate with the refrigerant outlet hole 12. The lower end of the discharge pipe is opened near the bottom of the tank 11, and the refrigerant liquid in the tank 11 is Through the discharge pipe 33, the refrigerant outlet hole 3
Sent to 2.

On the upper end surface of the connection block 12, a sight glass 34 made of a transparent parallel flat glass is disposed so as to face the end of the discharge pipe 33, and the inside of the discharge pipe 33 can be viewed from the outside. You can see it. 3
5 is an O-ring for sealing.

A pressure switch 23 for detecting an abnormal pressure in the liquid tank is provided with a pressure switch mounting hole 39 formed in the connection block 12 as shown in FIG.
It is inserted into the inside from above and is pressed down and fixed by the reinforcing member 13. 24 is an O-ring for sealing.

As described above, the connection block 12 has the refrigerant inlet hole 31, the refrigerant outlet hole 32, the pressure switch mounting hole 3
9 and the sight glass attachment portion are formed and have a complicated shape, but since they are all integrally formed by molding, no processing cost is required.

Reference numeral 25 shown in FIGS. 2 and 3 denotes a so-called burring screw formed on the reinforcing member 13 for tightening a screw for fixing the liquid tank to a frame of the refrigerator or the like.

FIG. 4 shows a second embodiment in which a high pressure pipe connected to an expansion valve (not shown) is not directly connected to the refrigerant outlet hole 42 but is connected to the refrigerant outlet hole 42. The sight glass 44 is attached to the connection member 43 so as to be connected to the member 43. 45 is a connection block made of synthetic resin, 46 is a discharge pipe, and the other parts are the same as in the first embodiment.

FIG. 5 shows a third embodiment, in which a tank body 51 is formed by a single part from a metal cylindrical pipe material. Both ends of the tank body 51 are formed into a thin cylindrical shape by drawing, and high-pressure pipes 21 and 22 are connected to openings of the drawing parts 52 and 53 at both ends.

The tank body 51 is used upright, the lower end of which is the refrigerant inlet hole 31, and the upper end of which is the refrigerant outlet hole 3.
2. Therefore, the desiccant 2 and the filter 3 are arranged at the lower part in the tank main body 51.

FIG. 6 shows a fourth embodiment, which is the same as the third embodiment in that the tank main body 51 is formed by a single part using a metal cylindrical pipe material. As in the second embodiment, the high pressure pipe connected to the expansion valve (not shown) is not directly connected to the refrigerant outlet hole 32,
Connected to the connecting member 54 connected to the refrigerant outlet hole 32,
The sight glass 55 is attached to the connection member 54. Thus, the sight glass 55 is connected to the connecting member 54.
, So that the inside of the discharge pipe 58 can be visually recognized from the outside.

In this embodiment, the desiccant 2 and the filter 3 are arranged in a donut shape in the lower part of the tank body 51, and a cup-shaped refrigerant reservoir 57 is provided inside the donut.
Is formed so that the lower end of the discharge pipe 58 connected to the refrigerant outlet hole 32 at the upper end is located near the bottom of the refrigerant reservoir 57.

[0022]

According to the liquid tank of the present invention, by forming the connection block for covering the tank portion and connecting other parts with synthetic resin, the complicated shape can be easily formed by molding or the like. It can be manufactured at low cost, and if the tank body is made of one piece of metal pipe material, the connection block becomes unnecessary and the manufacturing cost can be further reduced, and the connection between the two parts can be reduced. There is an excellent effect that it is not necessary to check the leakage of the refrigerant and the like, the assembly cost is reduced, and the occurrence of refrigerant leakage due to a mistake in the confirmation is eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line II of a first embodiment.

FIG. 2 is a sectional view taken along the line II-II of the first embodiment.

FIG. 3 is a plan view of the first embodiment.

FIG. 4 is a longitudinal sectional view of a second embodiment.

FIG. 5 is a longitudinal sectional view of a third embodiment.

FIG. 6 is a longitudinal sectional view of a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Tank part 12 Connection block 13 Reinforcement member 21 High-pressure pipe 22 High-pressure pipe 51 Tank body 52 Throttle part 53 Throttle part

Claims (1)

(57) [Claims] 1. A refrigerant tank is connected to a liquid tank connected in the middle of a high-pressure pipe between a condenser and an expansion valve for temporarily storing a circulating refrigerant in a liquid state in a refrigeration cycle. A metal tank part, a synthetic resin connection block for covering the opening of the tank part and connecting other parts, and reinforcing an engagement part between the tank part and the connection block. A liquid tank formed by a metal reinforcing member for use in the liquid tank.