JPH0611212A - Receiver for refrigerating machine - Google Patents

Abstract

PURPOSE:To diminish bubbling inside a receiver to suck only the refrigerant by a method wherein the opening of a refrigerant inlet pipe opens upward in a tubular casing and a guide with a spherical surface is located at the opposite position to the opening of the refrigerant inlet pipe and formed integrally into one body with or separately from the tubular casing. CONSTITUTION:Two-phase flow of gas-liquid mixed refrigerant S1 is spouted upward in a tubular casing 12 via a refrigerant supply pipe 18, a refrigerant inlet pipe 18a and a refrigerant inlet port 11a and strikes against an upper hemispherical member 19, spreads around, flows down along the inner wall of the tubular easing 12 and calmly reaches the liquid surface L of liquid refrigerant S2. Thereby, bubbling Bu is diminished, and only liquid refrigerant can be sucked into a suction pipe 14. Therefore, a reduction in cooling capability due to a choke of an expansion valve and damages to a compressor can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver used in a refrigerating device such as an air conditioner, a refrigerator, a chiller, a dehumidifier and the like.

[0002]

2. Description of the Related Art FIG. 3 is a diagram of a refrigerant circuit of an automobile air conditioner as an example of a refrigerating apparatus. In the figure, the high-temperature, high-pressure refrigerant gas discharged from the compressor 1 is condensed and liquefied by the condenser 2 and then enters the receiver 3, where the gas-liquid two-phase refrigerant is separated into a liquid refrigerant and a gas refrigerant. The liquid refrigerant taken out from the receiver 3 is adiabatically expanded by being throttled by the expansion valve 4, then evaporated and vaporized by the evaporator 5, and sucked into the compressor 1 again.

FIG. 4 is a vertical sectional view of the receiver 3.
Liquid refrigerant S ₁ containing gas refrigerant condensed and liquefied by the condenser 2
Passes through the refrigerant supply pipe 10 and flows into the casing 12 from the refrigerant inlet 11 provided at the top of the cylindrical casing 12 of the receiver 3, falls like a waterfall, and is stored in the bottom of the casing 12. It violently collides with the liquid surface L of the liquid refrigerant S ₂ . A large amount of bubbles Bu are generated during this collision,
The bubbles Bu pass through the filter 13 together with the liquid refrigerant S ₂ , pass through the suction pipe 14, flow out from the refrigerant discharge pipe 15, and enter the expansion valve 4. In addition, 16 is a sight glass and 17 is a bag-shaped zeolite.

[0004]

Since the liquid refrigerant S ₂ containing bubbles Bu has a large specific volume, it enters the expansion valve 4 in the conventional receiver and the expansion valve 4 chokes,
The refrigerant circulation amount (mass flow rate per unit time) is reduced, and as a result, the refrigerant evaporation amount in the evaporator 5 is reduced. As a result, the cooling capacity is reduced and the temperature of the refrigerant gas sucked into the compressor 1 is increased. Due to this, problems such as deterioration of durability of the compressor may occur.

In an automobile air conditioner equipped with this type of receiver, since the refrigerant leaks little by little from the refrigerant circuit, the liquid level L in the receiver 3 is lowered and the air bubbles are generated after a long period of time. Since Bu is likely to occur, the above-mentioned problem becomes remarkable and the compressor 1 may be damaged. The present invention aims to solve the above-mentioned drawbacks of the prior art, to reduce the generation of bubbles in the receiver, and to provide a receiver for a refrigeration system in which only the liquid refrigerant is sucked up.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and in a receiver for a refrigerating machine having a tubular casing to which a refrigerant supply pipe and a refrigerant discharge pipe are connected, the refrigerant supply pipe is While opening the continuous refrigerant inlet pipe upward in the cylindrical casing, the guide portion having a conical surface or a spherical surface for guiding the supplied refrigerant to the inner peripheral surface of the cylindrical casing, The present invention relates to a receiver for a refrigerating machine, which is provided at a position facing an opening of an inlet pipe integrally with or separately from the tubular casing.

[0007]

Since the gas-liquid mixed refrigerant is guided by the guide portion having the conical surface or the spherical surface, and gently flows down into the liquid refrigerant along the cylindrical inner wall surface, the generation of bubbles in the liquid refrigerant is reduced. .
This prevents the suction of bubbles (gas refrigerant).

[0008]

1 is a longitudinal sectional view of a first embodiment of a receiver according to the present invention. In the figure, 12 is a tubular casing, 18
Is a refrigerant supply pipe connected to an intermediate height position on a side surface of the casing, 18a is connected to the refrigerant supply pipe, extends into the casing 12, and is a refrigerant inlet pipe bent upward, and 11a is the same. A refrigerant inlet 19 at the upper end of the refrigerant inlet pipe is an umbrella-shaped hemispherical member 19 provided in the upper part of the casing and attached to the upper part of the suction pipe 14. The parts other than the above are the same as those in the conventional technique, and the same reference numerals as those in FIG.

In this apparatus, the gas-liquid mixed refrigerant S ₁ is jetted upward in the cylindrical casing 12 via the refrigerant supply pipe 18, the refrigerant inlet pipe 18a, and the refrigerant inlet 11a.
The two-phase flow collides with the upper hemispherical member 19 and spreads to the surroundings, flows down the inner wall surface of the cylindrical casing 12 and gently reaches the liquid surface L of the liquid refrigerant S ₂ , so that bubbles Bu are generated. Therefore, only the liquid refrigerant can be sucked up from the suction pipe 14.

FIG. 2 is a vertical sectional view of a second embodiment of the receiver of the present invention. In the figure, 12a is a cylindrical casing whose top shape is different from the conventional one, and 20 is the above-mentioned modified portion, which is the top of the casing formed to have a hemispherical inner surface. In this embodiment, the hemispherical member 19 described in the first embodiment is omitted. The parts other than the above are the same as those in the first embodiment.

In this embodiment, the cylindrical casing 12
two-phase flow of the gas-liquid mixed refrigerant jetted upward in a collides with the semi-spherical portion of the top, spreading to the surroundings, and transmitted to the inner wall surface of the cylindrical casing 12a gently on the liquid surface of the liquid refrigerant S ₂ As a result, as in the first embodiment, the generation of bubbles Bu is reduced, and only the liquid refrigerant can be sucked up from the suction pipe 14.

The hemispherical member or the apex having a hemispherical inner surface described in the above embodiment does not necessarily have to be a perfect hemispherical shape, and after the refrigerant collides, it spreads to the surroundings and has a smooth cylindrical casing. It suffices if it is formed so as to transfer onto the inner wall surface of the cylinder. It may also have a conical surface portion.

[0013]

In the receiver for a refrigerating device of the present invention, the refrigerant inlet pipe connected to the refrigerant supply pipe is opened upward in the cylindrical casing, and the supplied refrigerant is kept in the cylindrical casing. Since the guide portion having a conical surface or a spherical surface for guiding to the inner peripheral surface is provided at a position facing the opening of the refrigerant inlet pipe integrally with or separately from the cylindrical casing, the liquid refrigerant in the receiver is provided. Since the generation of bubbles in the inside is reduced and only the liquid refrigerant can be sucked up, it is possible to prevent the cooling capacity from being deteriorated by the choke of the expansion valve and the compressor from being damaged.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment of a receiver of the present invention.

FIG. 2 is a vertical sectional view of a second embodiment of the receiver of the present invention.

FIG. 3 is a refrigerant circuit diagram of an automobile air conditioner.

FIG. 4 is a vertical sectional view of a conventional receiver.

[Explanation of symbols]

1 Compressor 2 Condenser 3 Receiver 4 Expansion valve 5 Evaporator 10 Refrigerant supply pipe 11 Refrigerant inlet 12, 12a Cylindrical casing 13 Filter 14 Suction pipe 15 Refrigerant discharge pipe 16 Sight glass 17 Bag-like zeolite 18 Refrigerant supply pipe 18a Refrigerant inlet pipe 19 Hemisphere Shaped member 20 Hemispherical top of tubular casing S ₁ Gas-liquid mixed refrigerant S ₂ Liquid refrigerant L Liquid level Bu Bubble

Claims (1)

[Claims] 1. A receiver for a refrigerating apparatus, comprising a cylindrical casing to which a refrigerant supply pipe and a refrigerant discharge pipe are connected, wherein a refrigerant inlet pipe connected to the refrigerant supply pipe is opened upward in the cylindrical casing. In addition, a guide portion having a conical surface or a spherical surface for guiding the supplied refrigerant to the inner peripheral surface of the cylindrical casing is integrated with the cylindrical casing at a position facing the opening of the refrigerant inlet pipe. A receiver for a refrigeration system, which is provided separately.