JPH0875314A - Refrigerant distributor of refrigerator - Google Patents

Abstract

PURPOSE: To simplify the manufacture of a refrigerant distributor that distributes refrigerant in a closed cycle of a heat pump unit, and facilitate the pipe connection work at the time of installation of the heat pump unit. CONSTITUTION: A refrigerant supply hole 11 and refrigerant delivery holes 12 are connected together in a shape of return-bend in a main body 1 and a refrigerant supply pipe 2 and refrigerant delivery pipes 3 are connected to a side face of the main body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant shunt (distributor) used for an evaporator or a condenser constituting a multi-tube circuit in a refrigerating machine such as a so-called unit cooler applied to a refrigerating room. It is about.

[0002]

2. Description of the Related Art The basic structure of a refrigerating and refrigerating machine utilizes latent heat of a refrigerant. The refrigerant is compressed and heat is exchanged (heat radiation) in a condenser, and heat is exchanged (heat absorption) in an evaporator through an expansion valve. : Cooling) and then compressing again. Various structures such as a bare tube coil type, a plate type, and a fin tube type are known as the structure of the condenser and the evaporator, but in order to improve the efficiency, a multi-tube circuit is adopted in each system. .

When a multi-tube circuit is applied to this condenser or evaporator, a refrigerant shunt for distributing the refrigerant to the multi-tube circuit is used. The conventional refrigerant shunt is shown in FIG. In addition, one side (lower side) of the piece-shaped main body 01 is provided with a coolant supply hole 02.
A pressure reducing orifice ring 03 (when used in an evaporator) is installed in the middle of the supply hole 02, and a predetermined number (distribution number) is radially provided from the back of the orifice ring 03 to the other side (upper side). ) With the refrigerant distribution hole 04 of
The refrigerant supply pipe 05 is connected to the refrigerant supply hole 02, and each refrigerant distribution hole 04
The refrigerant distribution pipes 06 connected to the respective pipes of the condenser or the evaporator are used by brazing.

[0004]

The above-mentioned conventional refrigerant flow divider has a refrigerant supply pipe 05 above and below the main body 01, respectively.
The refrigerant distribution pipe 06 is connected by brazing. In this brazing operation, the pipes 05, 06 are fitted in the holes 02, 04, a metal brazing material is arranged in the fitting portions, and the brazing is performed by heating with a burner. Even if this brazing operation is mechanized, the brazing surfaces are present one above the other, so two brazing operations are required.

In particular, in the refrigerant distribution in the evaporator, if the refrigerant is not evenly distributed to the respective evaporation tubes, the refrigerant cannot be completely evaporated in a certain tube, or conversely, the refrigerant is heated, and this state is caused. Compressing the refrigerant with the compressor may cause damage such as damage to the compressor, or reduce cooling efficiency.
As illustrated in FIG. 5, the flow dividing pipe 06 is once raised to the same height and connected to each pipe of the evaporator 07, which requires a complicated work of matching the heights of the pipes. Therefore, the present invention proposes a novel refrigerant shunt that realizes simplification of manufacturing and facilitation of pipe connection work.

[0006]

A refrigerant distributor in a refrigerating machine according to the present invention is provided with a refrigerant supply hole in the central vertical direction of a disk-shaped main body and, if necessary, an appropriate intermediate portion of the supply hole. An orifice portion is provided, an inlet is formed in the peripheral portion of the inlet of the refrigerant supply hole, a predetermined number of refrigerant distribution holes communicating with the inner side portion of the orifice portion are radially formed, and a predetermined pipe is provided in each hole. It is characterized by being attached and connected.

[0007]

[Function] Each hole of the main body and each pipe are brazed by fitting each pipe into each hole, arranging a metal brazing material at the connection point and brazing by burner heating. Especially, the brazing surface is one side. Since it is formed only on the base, only one operation is required for mechanization of brazing. In addition, when using it, especially when using it for an evaporator, by adopting one with an orifice inside the main body and placing the main body at the highest position, even pressure can be applied to the multi-tube circuit of the evaporator. The refrigerant can be distributed.

[0008]

EXAMPLES Next, examples of the present invention will be described. The refrigerant distributor of the present invention includes a main body 1, a refrigerant supply pipe 2 connected to the main body, and a plurality of refrigerant distributor pipes 3. Body 1
Is formed into a disk shape, and the coolant supply holes 11 are formed in the central vertical direction, and a predetermined number (4 to 1
2) The connection port of the distribution hole 12 is arranged, and an appropriate orifice part is provided by inserting the orifice ring 13 in the middle of the supply hole 11 to distribute the supply hole 11 to the inner side of the orifice part. Distributing hole 12 by communicating with the connection port of hole 12
Is formed.

The supply hole 11 and each distribution hole 12 of the main body 1
The refrigerant supply pipe 2 and the plurality of refrigerant distribution pipes 3 are connected to each other. The connection is made by fitting predetermined pipes 2 and 3 into the respective opening portions of the holes 11 and 12, and connecting the metal wax to the connection points. The material is placed and brazed by heating with a burner.

The refrigerant supply pipe 2 is connected to the expansion valve in the closed cycle of the heat pump, and the flow dividing pipe 3 is connected to each pipe of the multi-tube circuit of the evaporator 4 to use a flow dividing device. Particularly, as illustrated in FIG. 3, the main body 1 is positioned at a predetermined height. Therefore, the refrigerant enters the main body 1 through the refrigerant supply pipe 2, is decompressed at the orifice portion, is evenly divided into the distribution holes 12, and the refrigerant is evenly supplied to each pipe of the multi-tube circuit of the evaporator 4. It is a thing.

Of course, the refrigerant flow divider can be used for the refrigerant flow to the condenser, but when it is used for the condenser, it is not necessary to provide an orifice portion.

[0012]

As described above, according to the present invention, the refrigerant supply hole and the refrigerant distribution hole are connected in a folded manner inside the main body, and the main body, the refrigerant supply pipe and the refrigerant distribution pipe are connected to one surface side of the main body. This makes it possible to simplify the brazing work between the main body and each pipe, and especially when using it for diversion of the evaporator, pipe bending work is required to consider the position of the diversion pipe. It also realizes easier piping connection work.

[Brief description of drawings]

FIG. 1 is an exploded explanatory view of each member of a flow divider according to an embodiment of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is an explanatory view of the same usage state.

FIG. 4 is a sectional view of a conventional flow divider.

FIG. 5 is an explanatory diagram of a usage state of a conventional flow divider.

[Explanation of symbols]

 1 Main Body 11 Refrigerant Supply Hole 12 Refrigerant Distribution Hole 13 Orifice Ring 2 Refrigerant Supply Pipe 3 Refrigerant Distribution Pipe 4 Evaporator

Claims (2)

[Claims] 1. A refrigerant distribution hole which is provided with a refrigerant supply hole in the central vertical direction of a disk-shaped main body and has an inlet formed in a peripheral portion of the inlet of the refrigerant supply hole so as to communicate with a rear side portion of the refrigerant supply hole. Is formed in a radial shape, and a predetermined pipe is brazed and connected to each hole. A refrigerant distributor in a refrigerating machine. 2. The refrigerant distributor according to claim 1, wherein an orifice portion is provided at an appropriate position of the refrigerant supply hole.