JP2001208451A - Refrigerant distributor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To equally distribute liquid refrigerant in a gas-liquid two-phase refrigerant into a plurality of refrigerant outlet pipes. SOLUTION: Gas-liquid two-phase refrigerant flowing in from a refrigerant inlet pipe 10 collides against a baffle wall 11. A circular groove 18 of at least the same internal diameter as that of the pipe 10 is provided at the center of the baffle wall 11. Linear grooves are provided to connect the center of the groove 18 and the respective centers of a plurality of refrigerant outlets 14 provided around the external periphery of the wall 11. Even when liquid refrigerant of the gas-liquid two-phase refrigerant collides against a part deviated from the center of the baffle wall 11, the liquid refrigerant is diffused in the circular groove 18 and equally distributed to the plurality of outlets 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator used for an air conditioner, a refrigerator, a heat storage system, and the like.
In particular, the present invention relates to a refrigerant distributor for distributing a gas-liquid two-phase refrigerant.

[0002]

2. Description of the Related Art FIG. 3 is a refrigeration circuit diagram having the above-described refrigerant distributor (hereinafter simply referred to as a distributor), and FIG. 4 is a longitudinal sectional view of a conventional distributor. In FIG. 3, 1 compresses the refrigerant,
Compressor for high-temperature and high-pressure gas-phase state, 2 condenser for releasing heat of gas-phase refrigerant to atmosphere and low-temperature and high-pressure liquid refrigerant, 3 expansion for adiabatic expansion of liquid refrigerant to two-phase gas-liquid A mechanism 4 is a refrigerant distributor for distributing a gas-liquid two-phase refrigerant to a plurality of refrigerants, 5 is an outlet pipe for guiding the refrigerant distributed by the distributor to each pipe, and 6 is a heat exchange between a low-temperature refrigerant and the outside. , An accumulator that separates the refrigerant into gas-liquid and returns only the gas-phase refrigerant to the compressor 1, 8 is a sight glass that checks the state of the refrigerant, and 9 is a refrigeration circuit that connects each part. Pipe.

In FIG. 4, reference numeral 10 denotes an inflow pipe through which a refrigerant flows into the distributor 4, 11 denotes a collision wall having a plane perpendicular to the pipe axis of the inflow pipe 10, and 12 denotes an inflow pipe 10 and the collision wall 1
A stirring chamber comprising a cylindrical space formed between
Reference numeral 3 denotes a connection wall surrounding the stirring chamber 12, reference numeral 14 denotes a plurality of refrigerant outlets provided at an equal pitch on an outer peripheral portion of the collision wall 13, and reference numeral 5 denotes an outlet pipe connected to the refrigerant outlet 14. The inflow pipe 10 is provided with a contraction portion 10 a for increasing the flow rate of the refrigerant flowing into the stirring chamber 12.

Next, the operation of the refrigeration circuit and the distributor 4 will be described. The refrigerant sealed in the refrigeration circuit is compressed by the compressor 1 and becomes a high-temperature and high-pressure gas-phase refrigerant. This gas-phase refrigerant
The condenser 2 emits heat to the outside, and becomes a high-temperature and high-pressure liquid refrigerant at the outlet. This liquid refrigerant is adiabatically expanded by the expansion mechanism 3, and
It becomes a low-temperature and low-pressure two-phase refrigerant in which a gas phase and a liquid phase are mixed. The gas-liquid mixed two-phase refrigerant flows into the distributor 4 from the inflow pipe 10, where the gas-liquid is mixed in the stirring chamber 12 and distributed to the plurality of outflow pipes 5. The refrigerant flowing from the outflow pipe 5 to the evaporator 6 absorbs external heat, and the refrigerant itself becomes a low-temperature and low-pressure gas phase.
Thereafter, the gas flows into the accumulator 7, where the gas phase and the liquid phase are separated, and only the gas phase returns to the compressor 1 and is compressed again.

Here, the refrigerant adiabatically expanded by the expansion mechanism 3 flows into the distributor 4 in a state where the gas phase and the liquid phase are not uniformly mixed, and reaches the contraction section 10a. The diameter of the contraction section 10a is reduced, and the flow rate of the refrigerant increases. Contraction part 10a
The high-speed refrigerant that has passed through collides with the collision wall 11 and
The gas-liquid refrigerant is agitated in 2 and the gas-liquid is uniformly mixed,
It flows out of the outlet 14.

[0006]

FIG. 5 is a longitudinal sectional view showing the state of the refrigerant flowing into the distributor 4 in principle, and FIG.
FIG. 6 is a cross-sectional view showing a refrigerant collision state in the distributor along the line VI-VI of FIG. As shown in FIG. 5, the refrigerant 15 is roughly classified into a flow 15 a having a large amount of gas-phase refrigerant and a flow 15 b having a large amount of liquid-phase refrigerant. Since the flow 15b containing a large amount of the liquid-phase refrigerant flows in a state that almost completely fills the inside of the pipe, the flow 15b collides with the vicinity of the center of the collision wall 11 and is agitated. However, the stream 15a containing a large amount of the gaseous refrigerant contains a small amount of the liquid refrigerant and is scattered in the gaseous refrigerant. Therefore, as shown in FIG. 6, the liquid refrigerant 17 does not always collide with the vicinity of the center 16 of the collision wall 11, and may collide with a position shifted from the center 16. At this time, as indicated by the arrow, the liquid-phase refrigerant 17 flows out of the outlet 14 close to the collision position.
(Shown by oblique lines), the gas-liquid ratio of the refrigerant flowing into the plurality of outlet pipes 5 is not uniform, and the outlet pipe 5 flows more in the liquid phase ratio and the outlet flow flows more in the gas phase ratio. Poor distribution occurs with the pipe 5.

When a distribution failure occurs, the evaporator 6 (FIG. 3)
In the pipe through which a lot of refrigerant flows, predetermined heat exchange is performed,
Predetermined heat exchange is not performed in a pipe with a small amount of refrigerant, and the overall heat exchange capacity is reduced. In a pipe in which the refrigerant flows excessively, liquid returns. Furthermore, in the case of a heat storage tank, when a distribution failure occurs, a pipe in which ice does not grow can be formed. Generally, the heat storage tank
Since the amount of ice is controlled by the middle water surface position, the ice making operation is not completed unless the total ice storage amount reaches the set amount. Therefore, if there is a pipe where ice does not grow, a lot of ice must be made in the pipe where ice grows,
If a lot of ice grows around the pipe, the water is sealed and the pipe is deformed or damaged. Therefore, an object of the present invention is to
It is to make the distribution of the refrigerant by the distributor more even.

[0008]

According to the present invention, a stirring chamber is formed between a refrigerant inflow pipe and an impingement wall having a plane perpendicular to the pipe axis. The gas-liquid two-phase refrigerant flowing from the pipe is stirred in the stirring chamber,
In the refrigerant distributor that distributes to a refrigerant outflow pipe connected to a plurality of refrigerant outlets of the collision wall outer peripheral portion, the inner wall surface of the collision wall has an inner diameter equal to or larger than the inner diameter of the refrigerant inflow pipe. A circular groove is provided concentrically with the refrigerant inflow pipe, and a linear groove is provided along a straight line connecting the center of the circular groove and the center of each of the refrigerant outlets.

[0009]

1 is a longitudinal sectional view of a distributor according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG. 1 and 2, the difference from the prior art is that a circular groove 18 is provided concentrically with the refrigerant inflow pipe 10 on the inner wall surface of the collision wall 11, and the center of the circular groove 18 and the refrigerant outlet 14 are provided. The point is that a straight groove 19 is provided along a straight line connecting the centers of the two. Here, the circular groove 1
The inner diameter of 8 is the same as or larger than the inner diameter of the refrigerant inlet pipe 10.

In such a distributor, when the ratio of the gas phase of the refrigerant flowing from the inflow pipe 10 is large, the contained liquid phase refrigerant 17 collides with the collision wall 11 away from the center 16 as shown in FIG. However, the inner diameter of the circular groove 18 is
The liquid-phase refrigerant 17 collides with the inside of the circular groove 18 because it is equal to or larger than the inner diameter of. The colliding liquid-phase refrigerant 17 tends to flow out of the plurality of outlets 14 to the outlet 14 closest to the collision position. Diffusion into 18. Since the refrigerant continuously flows in from the inflow pipe 10, the liquid-phase refrigerant 17 diffused in the circular groove 18 does not stay in the circular groove 18, but is pushed out to the other outlet 14 as well. It flows out of the outflow pipe 5. As a result, a gas-liquid two-phase refrigerant having a substantially constant gas-liquid ratio flows through the plurality of outlet pipes 5.

[0011]

As described above, according to the present invention, the gas-liquid two-phase refrigerant can be evenly distributed to a plurality of pipes, and insufficient heat exchange and liquid return due to poor distribution, defective ice making in the heat storage tank, and the like can be achieved. Disappears.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a refrigerant distributor showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a circuit diagram of a refrigerator having a refrigerant distributor.

FIG. 4 is a longitudinal sectional view of a conventional refrigerant distributor.

FIG. 5 is a longitudinal sectional view showing a state of a refrigerant flowing into the distributor of FIG. 4 in principle.

6 is a cross-sectional view showing a refrigerant collision state in the distributor along a line VI-VI in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Compressor 2 Condenser 3 Expansion mechanism 4 Refrigerant distributor 5 Refrigerant outflow pipe 6 Evaporator 7 Accumulator 8 Sight glass 10 Refrigerant piping 11 Collision wall 12 Stirring chamber 14 Refrigerant outlet 15 Refrigerant 15a Gas-phase refrigerant flow 15b Liquid-phase refrigerant Flow 16 collision wall center 17 liquid refrigerant 18 circular groove 19 straight groove

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yuichi Fujimoto 1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Osamu Ishiyama 1 Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. 1 Fuji Electric Co., Ltd. F-term (reference) 3H019 BA44

Claims (1)

[Claims] 1. A stirring chamber is formed between a refrigerant inflow pipe and a collision wall having a plane perpendicular to the pipe axis, and a gas-liquid two-phase refrigerant flowing from the refrigerant inflow pipe is stirred in the stirring chamber. A refrigerant distributor for distributing refrigerant to a refrigerant outlet pipe connected to a plurality of refrigerant outlets on an outer peripheral portion of the collision wall, wherein an inner diameter of the inner wall of the collision wall is equal to or larger than an inner diameter of the refrigerant inflow pipe. A refrigerant groove provided concentrically with the refrigerant inflow pipe and a linear groove provided along a straight line connecting the center of the circular groove and the center of each of the refrigerant outlets.