JPH05126438A - Liquid tank - Google Patents

Abstract

PURPOSE:To make the production of liquid tanks easy and prevent leakages of refrigerant by a method wherein a liquid tank main body consists of a metallic tank and a synthetic resin connecting block which serves as a lid of the metallic tank and an adapter to connect other parts to the liquid tank and the metallic tank and the block are connected together with a reinforcing member placed between them. CONSTITUTION:The main body of a liquid tank consists of a cylindrical metallic tank 11 with a bottom and a synthetic resin connecting block 12 which serves as a lid that covers the upper opening of the metallic tank and an adapter to connect high-pressure pipes 21 and 22, a pressure switch and others to the liquid tank. A metallic reinforcing member 13 is provided to reinforce the joint between the connecting block 12 and the metallic tank 11. The connecting block 12 is fixed in the metallic tank in such a way that the upper brim of the tank 11 that is bent inward is caulked on the block so that the block 12 is pushed to a bead 11a that is formed by constricting the upper side wall of the tank 11 inward. The reinforcing member 13 prevents the connecting block 12 from being damaged when a large force such as caulking force is exerted on it.

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
The tank part for storing the refrigerant and the connection block part for covering the tank part and connecting the other parts are both made of metal, and both are connected by caulking or welding.

[0003]

However, since the connecting block is generally complicated in shape, it is necessary to machine the connecting portion with the pipe and the connecting portion with the pressure switch.
The component cost will be considerably high.

[0004] Therefore, an object of the present invention is to provide an economical liquid tank capable of significantly reducing the cost of parts.

[0005]

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

The liquid tank of the present invention is a tank of 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. It is characterized in that the main body is formed of a single part by a metal pipe material whose both ends are formed to have a small diameter by drawing, and the high-pressure pipe is connected to the opening portions of the both ends of the drawing part. In addition, the 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 into the discharge pipe connected to the refrigerant outlet hole in the liquid tank is the connecting member. May be attached to.

[0007]

Embodiments will be described with reference to the drawings. Figure 3
1 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 for temporarily storing a circulating refrigerant in a liquid state in a refrigeration cycle,
1 is a sectional view taken along the line I-I, and FIG. 2 is a sectional view taken along the line II-II.

The tank body of this liquid tank has a bottomed cylindrical metal tank portion 11 for storing a refrigerant,
A connection block 12 made of synthetic resin for covering the opening at the upper end of the tank 11 and connecting the high-pressure pipes 21, 22 and the pressure switch 23, and the connection block 1
It is formed by a metal reinforcing member 13 for reinforcing the engaging portion between the tank 2 and the tank portion 11.

The connection block 12 is crimped at the upper edge of the tank portion 11 bent inward, and the bead 11a is formed on the upper side surface of the tank portion 11 so as to be constricted inward.
It is pressed against and is firmly fixed. An O-ring 14 for sealing is attached between the outer circumference of the connection block 12 and the inner surface of the tank portion 11. The bead 14 prevents the tank portion 11 from expanding due to the internal pressure and ensures the sealing property of the O-ring 14 portion.

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

Further, a desiccant 2 for adsorbing the water mixed in the refrigerant is disposed in the upper part of the tank 11 so as to be sandwiched by a filter 3 for filtering dust and the like.

31 and 32 shown in FIGS. 1 and 3
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 which is opened near the bottom of the tank portion 11 so that the refrigerant liquid in the tank portion 11 is , The refrigerant outlet hole 3 through the discharge pipe 33
Sent to 2.

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

The pressure switch 23 for detecting an abnormal pressure in the liquid tank has 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 and fixed by the reinforcing member 13. Reference numeral 24 is an O-ring for sealing.

As described above, the connection block 12 includes the refrigerant inlet hole 31, the refrigerant outlet hole 32, and the pressure switch mounting hole 3.
9 and a sight glass attachment portion are formed and have a complicated shape, but since all are integrally formed by molding, processing cost is not required.

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

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

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

It should be noted that the tank body 51 is used vertically upright, with the lower end portion being the refrigerant inlet hole 31 and the upper end portion being the refrigerant outlet hole 3.
It is 2. Therefore, the desiccant 2 and the filter 3 are arranged in the lower part of 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 of one part by a metal cylindrical pipe material. As in the second embodiment, without directly connecting the high pressure pipe connected to the expansion valve (not shown) to the refrigerant outlet hole 32,
By connecting to the connecting member 54 connected to the refrigerant outlet hole 32,
The sight glass 55 is attached to the connecting member 54. In this way, the sight glass 55 is connected to the connecting member 54.
The inside of the discharge pipe 58 can be seen from the outside.

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

[0022]

According to the liquid tank of the present invention, by forming a connection block for covering the tank portion and connecting other parts with a synthetic resin, its 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 a single piece of metal pipe material, a connection block is not required and the manufacturing cost is further reduced. Since it is not necessary to check the leakage of the refrigerant, the assembly cost can be reduced, and the refrigerant leakage due to the confirmation error can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of the first embodiment.

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

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

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

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

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

[Explanation of symbols]

 11 Tank Part 12 Connection Block 13 Reinforcing Member 21 High Pressure Piping 22 High Pressure Piping 51 Tank Main Body 52 Throttling Section 53 Throttling Section

Claims (3)

[Claims] 1. A tank body of a liquid tank, which is 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, stores the refrigerant. A metallic tank portion, a connection block made of a synthetic resin for covering the opening of the tank portion and connecting other parts, and an engaging portion between the tank portion and the connection block is reinforced. A liquid tank characterized by being formed with a metal reinforcing member for 2. A tank main body of 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 liquid tank characterized in that the pipe is made of a metal pipe material having a small diameter by processing and is formed as a single component, and the high-pressure pipe is connected to the openings of the throttle portions at the both ends. 3. A sight glass for looking into the discharge pipe connected to the refrigerant outlet hole in the liquid tank by providing a connecting member for connecting the refrigerant outlet hole of the tank portion and the high-pressure pipe. The device according to claim 2, which is attached to the connecting member.
The listed liquid tank.