JPS60216156A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a refrigeration device used in cooling and heating appliances such as air conditioners, refrigerators, and low-temperature showcases.

(b) Prior art Publication No. 45-16551 (JPC170B41)
shows a refrigeration cycle device that includes a suction pipe, a cabillary tube attached to the suction pipe, and an insulated pipe that serves as both the suction pipe and the capillary tube.

According to the construction pressure that increases, the heat conduction from the cooler that the suction pipe receives and the gas-liquid mixed refrigerant in the suction pipe toward the compressor cool the capillary tube and at the same time flow through this cavillary refrigerant. By performing so-called heat exchange in which the suction pipe is heated by a high-temperature liquid refrigerant, and by performing this heat exchange using an insulated pipe so that it is not affected by the outside air, dew condensation on the suction pipe can be prevented. be able to.

However, in this configuration, the suction pipe does not have parts such as capillary tubes and evaporation pressure regulating valves that act as flow path resistance for the gas-liquid mixed refrigerant, so the gas-liquid mixed refrigerant is mixed with the high-temperature liquid refrigerant in the capillary tube. Since the liquid passes straight through the suction pipe while exchanging heat with the liquid, the amount of evaporation due to heat exchange is small, and the liquid still containing liquid returns to the compressor, resulting in liquid backflow to the compressor. or,
The capillary tube is integrally fixed by soldering the suction pipe nine, and after fixing, both the suction pipe and the capillary tube are covered with a cylindrical heat-insulating pipe, which has the drawback of making the fixing and covering work time-consuming. occured.

Also, Publication No. 46-20407 (JPC).

68A421) shows a configuration in which a capillary tube is wound multiple times around a part of the suction pipe, but in this configuration, the high temperature liquid refrigerant passing through the capillary tube is slightly overcooled. However, it is not possible to prevent dew condensation or liquid backing of the suction pipe.

Also, Japanese Utility Model Application Publication No. 56-12773 (IPC).

F25D19100) has a refrigeration system in which an accumulator whose outer periphery is coated with a thermally inert material is buried in a heat insulating wall, but in such a configuration no heat exchange action with the capillary tube occurs.

Further, in the multi-source refrigerator shown in US Pat. No. 3,005,321 and the drawings, the accumulator is arranged to have an adiabatic internal wall pressure, but the heat exchange effect with the cavity ceiling still occurs and the accumulator is 1L.

(c) Purpose of the Invention The purpose of the present invention is to solve the drawbacks of the prior art and to improve the refrigerating capacity.

2) Structure of the Invention A part of the capillary tube is wound around the outer periphery of the accumulator in which the internal pressure of the insulation wall is arranged. The liquid refrigerant is heated by the high-temperature liquid refrigerant passing through the capillary tube to prevent dew condensation on the outer peripheral surface of the °C accumulator and liquid back-up of the refrigerant returning to the compressor. A refrigeration system that cools the high-temperature liquid refrigerant that is passing through it and turns it into supercooled liquid, improving its refrigerating capacity.

(E) Embodiments of the Invention The present invention will be described in detail below with reference to the drawings.
), a transparent door (3) - a transparent ceiling wall (4), a storage room (5) formed by equal pressure, and an insulating wall (6) made of polystyrene foam with an open top located directly below this storage room. a cooling chamber (9) which accommodates a cooler (7) and a cooler fan (8) and supplies circulating cold air to the storage chamber; The refrigeration cycle is composed of a refrigerant compressor (101), a condenser (111), and a machine room (131) housing a condenser fan 02.

04] is a metal accumulator that separates the gas-liquid mixed refrigerant returned from the cooler (7) to the compressor (TO+) into gas and liquid, and returns the gas to the compressor, with the lower part serving as a liquid reservoir. A large diameter part (14A) with a large diameter, and an inlet part (14B) at the upper end that is smaller in diameter than this large diameter part and connected by means such as welding to a suction pipe A (15A) through which a gas-liquid mixed refrigerant flows. , a suction pipe B which has a smaller diameter than the large diameter part and through which the gas refrigerant flows, similar to this inlet part.
(15B) forms an outlet portion (14C) at the lower end connected by means such as K welding. aυ is the condenser (
The high-temperature liquid refrigerant from 11) is depressurized and introduced into the cooler (7) as a low-temperature liquid refrigerant. A heat exchange part (16A) that is brought into close contact with the heat exchange part (16A) by winding a plurality of times, and the inlet part or suction pipe A (15A) that is downstream in the refrigerant flow direction from this heat exchange part.
A first locking part (16B) is wound around the outlet part or suction pipe B (15B) which is upstream of the heat exchange part in the refrigerant flow direction.
).

a71 is the cylindrical storage part formed with the above-mentioned heat-insulating wall pressure;
Opening (18) for inserting the accumulator I on the top surface
A) An opening (18B) for pulling out the suction vibrator B (15B) is formed on the bottom surface, and the temperature is set at ℃. The Akinimulator has a heat exchange part (16) of a capillary tube tttp.
Insulating wall (6) so that A) is in pressure contact with the inner wall of storage section (171)
placed within.

As shown in FIG.
71, Suction vibe A (15A), accumulator (141, Suction vibe B (15B)) are connected in a ring, and by flowing the refrigerant in the direction of the arrow, the refrigerant is compressed, condensed and liquefied, decompressed, and evaporated. In this refrigeration cycle, the high-temperature liquid refrigerant passing through the heat exchange part (16A) of the capillary tube ae is depressurized and heat exchanged with the liquid refrigerant stored in the Akinimure-20 section to subcool it. On the other hand, the liquid refrigerant stored in the accumulator (141) is heated by the latent heat of the high temperature liquid refrigerant passing through the heat exchanger (16A) and becomes a gas refrigerant.
) itself is heated by the latent heat and maintained at a temperature above the dew point.

According to this configuration, the capillary tube h is attached to the outer circumferential surface of the aluminum plate Q4j disposed within the heat insulating wall (6).
Since the heat exchange part (16A) is formed by winding a part of e a plurality of times to form a heat exchange part (16A) that is in close contact with the outer circumferential surface, the heat exchange part (16A)
The accumulator itself is heated by the latent heat of the high-temperature liquid refrigerant passing through the accumulator 04) and is maintained at a temperature above the dew point, and the liquid refrigerant separated from the gas and stored in the accumulator 04) is gradually evaporated to 9°C. While it becomes a gas refrigerant, the liquid refrigerant pressure inside the accumulator 04 causes the heat exchange part (16
The high temperature liquid refrigerant passing through A) is cooled and becomes a supercooled liquid. As a result, it is possible to prevent dew condensation in the accumulator (141) and liquid back-up of the refrigerant returning to the compressor QUIK, and to improve heat exchange in the cooler by turning the high-temperature liquid refrigerant into a supercooled liquid and depressurizing it by degrees Celsius. In addition, since the heat exchange part (16A) can be closely attached to the outer peripheral surface of the accumulation rake 04 by the elasticity of the capillary tube (161 itself), solder, tape, etc. can be used.1.c<Heat exchange part (16A)' (It can be attached to l' accumulator Q41.

In addition, by forming a heat exchange part (<16A) on the outer circumferential surface of the liquid storage part of the accumulator (1411c), it is possible to intensively heat the liquid refrigerant stored in the accumulator (1411c), and at the same time, the heat exchange part (16A) The high-temperature liquid refrigerant passing through can be intensively cooled, allowing efficient heat exchange.

In addition, a part of the capillary tube (161) on the upstream and downstream sides of the heat exchanger (16A) in the refrigerant flow direction is connected to the inlet part (14B) of the accumulator (141) and the outlet part (
Suction vibes A and B (15A) (15B) connected to the outer peripheral surface of 14C) or the inlet and outlet sections thereof
Both the first and second locking parts (16B) (
16C), the heat exchange part (16A) can be attached to a predetermined position, and displacement of the heat exchange part (16A) due to pulsation of the compressor (101) can be prevented.

In addition, a heat exchange section (16A) is installed on the inner wall of the storage section αD of the heat insulating wall (6).
), the heat exchanger (16A) is pushed in the direction of the accumulator (141) by the inner wall of the housing section αD, and the heat exchanger (16A)
At the same time, the adhesion of the heat exchanger (16A)
It also serves as a sealing material between the accumulator 01 and the inner wall of the storage section α7), thereby preventing cold air from leaking from the surface of the storage section.

(f) Effects of the Invention Since the present invention is configured as described above, it produces the effects listed below.

■ The liquid refrigerant stored in the accumulator and the high-temperature liquid refrigerant passing through the heat exchange section of the capillary tube mutually exchange pressure and heat, preventing condensation on the outer circumferential surface of the accumulator and preventing liquid packs from returning to the compressor. At the same time, supercooling can be obtained during depressurization of the high-temperature liquid refrigerant, and the heat exchange efficiency of the cooler can be improved.

- Since the gear pillar tube's own elasticity allows the heat exchange part to be closely attached to the outer circumferential surface of the accumulator, the heat exchange part can be easily attached to the accumulator without using solder, adhesive tape, etc.

[Brief explanation of the drawing]

The drawings all show an embodiment of the refrigeration system of the present invention, and FIG. 1 is a sectional view taken along the line 2 to 2, FIG. 2 is a vertical sectional view of the refrigeration system, and FIG. 3 is a refrigerant circuit diagram. (6)...insulation wall, α4)...accumulator, Q6! ...Capillary tube, (16A)...
heat exchange section. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Shizuka Sano Sodai Ome? Figure 1

Claims (1)

[Claims] 1. A refrigeration device in which a portion of a capillary tube is wound multiple times around the outer circumferential surface of an accumulator disposed within a heat insulating wall to form a heat exchange portion that is in close contact with the outer circumferential surface. . 2. The refrigeration system according to claim 1, wherein the heat exchange portion is formed on the outer circumferential surface of the liquid reservoir portion of the accumulator. 3. Parts of the capillary tube on the upstream and downstream sides in the refrigerant flow direction of the heat exchange section are connected to the outer circumferential surface of the inlet and outlet portions of the accumulator, or to the succinct pipes connected to the inlet and outlet sections of the accumulator. Wrap around the outer circumferential surface of the first
The refrigeration apparatus according to claim 1 or 2, further comprising: and a second locking portion. 4. The refrigeration system according to claim 1, wherein an accumulator is disposed by bringing a heat exchange section of a capillary tube into pressure contact with the inner wall of the storage section of the heat insulating wall.