JPS5810948Y2 - Refrigeration equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to an improved configuration of a refrigeration system, and in particular, after the refrigerant compressor is stopped, the liquid refrigerant is stored in the accumulator without being accumulated in the evaporator, and the refrigerant is activated when the refrigerant compressor is restarted. It has good properties.

Conventionally, this type of refrigeration equipment has an accumulator located near the evaporator at approximately the same height, so during defrosting operation, liquid refrigerant remains in the evaporator and evaporates. As a result, the defrosting time may be prolonged or frost may remain.Also, even if the outer circumference of the accumulator is coated with an insulating material to prevent condensation, the suction pressure of the refrigerant compressor will increase due to vaporization of the stored liquid refrigerant. The refrigerant compressor had poor startup performance when restarted after defrosting, etc.

This proposal was developed in view of these points, and the figure will be explained below.

Reference numeral 1 denotes a refrigeration equipment main body in which a storage chamber 5 is formed by an inner box 2, an outer box 3, and a heat insulating wall made of a heat insulating material 4 filled with foam between the two boxes 2 and 3. An evaporator 9 is provided which forms a refrigerant cycle together with a refrigerant compressor 6, a condenser 7, a capillary tube 8, etc. that cools the inside of the storage chamber 5 to a desired temperature.

An accumulator 11 is positioned below the bottom of the evaporator 9 and is connected to the suction pipe 10 in communication between the suction port of the refrigerant compressor 6 and the discharge port of the evaporator 9. There is.

The accumulator 11 has an inlet 11A communicating with the evaporator 9 in the lower part and a discharge outlet 11B communicating with the refrigerant compressor 6 in the upper part. While covering the inertial object 12,
It is embedded in the heat insulating material 4.

Since the present invention is configured as described above, when the refrigerant compressor stops during defrosting operation, almost all of the liquid refrigerant in the evaporator flows down and is stored in the accumulator located at a low position, and the liquid refrigerant in the evaporator is stored. There is little refrigerant evaporation, and the defrosting time ends quickly.

Furthermore, since the accumulator is embedded in a heat insulating material, there is almost no condensation on the outer peripheral surface of the accumulator.

Moreover, due to the thermal inertia, the accumulator will not move for a certain period of time (
For example, during defrosting operation time), the thermal inertia caused by heat storage causes the refrigerant to be occasionally cooled and retained, suppressing refrigerant vaporization in the accumulator and not increasing the suction pressure of the refrigerant compressor, making it easier to start when the refrigerant compressor is restarted. becomes good.

[Brief explanation of the drawing]

FIG. 1 is a schematic refrigerant circuit diagram of the device according to the present invention, and FIG. 2 is a sectional view of the main parts thereof. 9...Evaporator, 11...Accumulator, 12...Thermal inertia object.

Claims (1)

[Scope of utility model registration request] In a refrigerant cycle formed by a refrigerant compressor, a condenser, a capillary tube, an evaporator, etc., an accumulator is located between the suction port of the refrigerant compressor and the discharge port of the evaporator below the bottom of the evaporator. A refrigeration system characterized in that the accumulator is coated with a thermally inert material on its outer periphery and is embedded in a heat insulating material of a heat insulating wall forming a storage chamber.