JPH0518638A - Refrigerant branching device for refrigeration cycle - Google Patents

Abstract

PURPOSE:To uniformize the velocity of flow and a flow rate of the branch flop of a refrigerant from a distributor to a branch pipe by a method wherein the flow of a refrigerant fed from the distributor forms a continuous vortex. CONSTITUTION:In a refrigerant branching device for a refrigeration cycle provided with a refrigerant branch part having a distributor located on the inlet side of a heat-exchanger, a recessed part 10 to generate the vortex of a refrigerant flowing to the distributor is formed in the inner surface of a portion right before a bent part 3a of a piping 3 connected to the distributor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerant distribution device for a refrigeration cycle, which is designed to make the distribution of refrigerant from a distributor to a distribution pipe uniform.

[0002]

2. Description of the Related Art Generally, a refrigeration cycle for an air conditioner or the like is constructed by connecting a compressor, an outdoor heat exchanger B, a pressure reducing device C, and an indoor heat exchanger D in sequence with a refrigerant pipe, as shown in FIG. If the capacity of the refrigeration cycle is large, the distributor 1 is installed in the refrigeration cycle,
The distributor 1 and the heat exchanger D connected in parallel are connected by the flow dividing pipes 2a, 2b, 2c, whereby the heat exchanger sends cold soot in parallel and a uniform heat exchange action is performed. That is, the distributor 1 provided in the refrigerant distribution portion of the refrigeration cycle is connected to the joint pipe 3 having the curved portion 3a located upstream of the indoor heat exchanger (not shown in FIG. 8). 1 and the pipe 4 are connected to the T-type joint pipe 5.

[0003]

When a distributor pipe provided in the refrigerant distribution portion of the refrigeration cycle is connected with a joint pipe having a curved portion, the refrigerant flow through the curved portion 3a is, as shown in FIG. , The refrigerant 6a flowing on the inner peripheral side and the refrigerant 6b flowing on the outer peripheral side have different flow velocities, and are therefore sent to the distributor 1 from which the flow dividing pipes 2a, 2
The flow velocity of the refrigerant divided into b and 2c is such that the flow dividing pipe 2a (outer peripheral side)> the flow dividing pipe 2b> the flow dividing pipe 2c (inner peripheral side), and the flow amount and flow velocity of the divided flow from the distributor to the flow dividing pipe are not uniform. Therefore, the heat exchange efficiency of each heat exchanger provided in the refrigeration cycle varies.

Further, the distributor 1 and the pipe 4 are connected to the T
In the case of connection by the type joint 5, the refrigerant flow in the pipe 4 hits the wall surface of the T type joint 5, and by changing the flow of the refrigerant, the refrigerant flow sent to the distributor becomes uniform, so that the distribution pipe 2a, Although the amount of the refrigerant divided into 2b and 2c becomes uniform, the wall surface of the T-shaped joint acts as a resistance body of the refrigerant flow, so that the refrigerant circulation amount flowing through the refrigeration cycle decreases, the refrigeration cycle capacity decreases, and Connecting the T-joint to the pipe increases the number of welding points, which in turn increases the cost.

The present invention has been made in view of the above-mentioned points, and a refrigerating system is formed in which the vortex flow toward the distributor is formed on the inner surface of the pipe connected to the distributor so that the refrigerant distribution from the distributor is made uniform. An object of the present invention is to provide a refrigerant flow dividing device for a cycle.

[0006]

A refrigerant distribution device for a refrigeration cycle according to the present invention has a distributor on an inner surface of a portion of a pipe connected to a distributor of a refrigerant distribution portion provided on an inlet side of a heat exchanger, immediately before a bent portion. It is provided with means for forming a swirling flow of the oncoming refrigerant. Further, the refrigerant distribution device for the refrigeration cycle of the present invention is provided with a spiral groove or a concave portion for forming a vortex flow of the refrigerant on the inner surface of the pipe connected to the distributor of the refrigerant distribution portion provided on the inlet side of the heat exchanger. Consists of

[0007]

In the refrigerant distribution device for the refrigeration cycle of the present invention, the vortex flow forming means formed on the inner surface of the pipe connected to the distributor provided on the inlet side of the heat exchanger forms a vortex flow in the refrigerant flow through the pipe. , The flow velocities of the refrigerant diverted from the distributor to the diversion pipes are equal, therefore the amount of the refrigerant diverted to the diversion pipes becomes almost uniform according to the flow velocity, and the heat exchange in each heat exchanger pipe will not vary. Absent.

Further, by providing the spiral groove or the concave portion in the pipe, the refrigerant flow toward the distributor forms a continuous vortex flow, and the amount of the refrigerant distributed to the distribution pipe becomes more uniform.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1, the same members as those in FIG. 8 are designated by the same reference numerals. In FIG. 1, reference numeral 10 indicates a concave portion for forming a refrigerant swirl provided in the joint pipe 3 connected to the distributor 1 of the refrigerant distribution portion provided in the refrigeration cycle. The concave portion 10 is a bent portion 3 a of the joint pipe 3. Is formed on the inner surface of the part immediately before. As shown in FIGS. 2 and 3, the recess 10 has a shape similar to the upper surface of the wing of an airplane. Therefore, the refrigerant passing through the joint pipe 3 is biased in the direction of the vector Fb in the recess 10 as shown in FIG. 3, and is biased in the direction of the vector Fa in the bent portion 3a as shown in FIG.
Leading to.

Therefore, the vector Fb in the recess 10 is
Is the component Fbx in the X-axis direction as shown in FIGS.
Is decomposed into a component Fby in the Y-axis direction, and the vector Fa in the bent portion 3a is decomposed into a component Fax in the X-axis direction and a component Faz in the Z-axis direction. Therefore, the combined vector Fc of the vector Fb and the vector Fa at an arbitrary point O in the bent portion 3a after the concave portion 10 of the joint pipe 3 is the component Fcx (Fbx + Fax) in the X-axis direction and the component in the Y-axis direction. Fb
The refrigerant flow formed by y and the component Fa in the Z-axis direction and passing through the joint pipe 3 is combined with the bending of the inner diameter of the joint pipe 3,
As it goes toward the distributor 1 while winding a continuous vortex as indicated by the symbol Q in FIG. 5, the flow velocity and flow rate of the refrigerant branched from the distributor 1 to the flow dividing pipes 2a, 2b, 2c become substantially equal.

FIG. 7 shows a modification of the present invention.
In this modification, a spiral groove 11 is formed on the inner surface of the joint pipe 3, and the refrigerant flow passing through the joint pipe 3 is directed toward the distributor 1 while winding a continuous vortex, and from the distributor 1 to the distribution pipes 2a, 2b, 2c. The flow velocity and flow rate of the refrigerant that is split into two are substantially equal.

[0012]

As described above, according to the present invention, since the refrigerant flow sent to the distributor forms a continuous vortex flow, the flow velocity and the flow rate of the refrigerant branch flow from the distributor to the distribution pipe are made uniform. be able to.

[Brief description of drawings]

FIG. 1 is a diagram showing a refrigerant distribution device of a refrigeration cycle according to the present invention.

FIG. 2 is a diagram showing a main part of a refrigerant distribution device of a refrigeration cycle according to the present invention.

FIG. 3 is a diagram showing a vector of a refrigerant flow passing through a main part of the refrigerant diversion device.

FIG. 4 is a diagram showing a vector of a refrigerant flow passing through a bent portion of the refrigerant distribution device.

FIG. 5 is a vector composition diagram of a refrigerant flow passing through a bent portion of the refrigerant diversion device.

FIG. 6 is an enlarged view of the vector composition diagram.

FIG. 7 is a diagram showing a modification of the present invention.

FIG. 8 is a diagram showing a conventional refrigerant distribution device for a refrigeration cycle.

FIG. 9 is a diagram showing a refrigerant flow through a bent portion of a conventional refrigerant distribution device for a refrigeration cycle.

FIG. 10 is a diagram showing another example of the conventional refrigerant distribution device of the refrigeration cycle.

FIG. 11 is a diagram showing a configuration of a general refrigeration cycle.

[Explanation of symbols]

1 distributor 2a, 2b, 2c distribution pipe 3 joint piping 3a bent part 10 recess 11 spiral groove

Claims (2)

[Claims] 1. A refrigerant distribution device for a refrigeration cycle having a refrigerant distribution part having a distributor on the inlet side of a heat exchanger, wherein a vortex flow of the refrigerant toward the distributor is formed on the inner surface of a portion of a pipe connected to the distributor immediately before a bent part. A refrigerant distribution device for a refrigeration cycle, characterized in that it comprises means for forming. 2. A refrigerant distribution device for a refrigerating cycle, wherein a refrigerant distribution part having a distributor is provided on the inlet side of a heat exchanger, and a spiral groove or recess for forming a vortex flow of the refrigerant on the inner surface of a pipe connected to the distributor. A refrigerant distribution device for a refrigeration cycle, comprising: