JPS60276A - 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 The present invention relates to a refrigerator that utilizes heat radiation from the high-pressure side piping of a refrigeration cycle to prevent sweating from occurring in the refrigerator body. The objective is to improve performance and reduce power consumption.

Generally, sweating at the front opening of the refrigerator body is caused by humidity and the difference between the outside temperature of the refrigerator body and the outside temperature exceeds a certain value, and sweating does not occur all year round. However, in this type of refrigerator, a part of the high-pressure side piping of the refrigeration cycle is heat-transferably installed in the front opening of the refrigerator body, and refrigerant gas is constantly flowing through the front opening to warm the front opening, thereby reducing the above-mentioned temperature difference. . Therefore, heat is radiated through the high-pressure side piping even when it is not needed, and this heat is transmitted to the inside of the refrigerator, causing negative effects, reducing cooling performance, causing unnecessary refrigeration system operation, and increasing power consumption. .

The present invention eliminates the drawbacks of the conventional example described above, and one embodiment will be described below with reference to the drawings. 1 is a refrigerator body, 2 is a door, 3 is a gasket provided on the outer periphery of the back surface of the door 2 and abuts against the front opening edge 1a of the refrigerator body 1, 4 is a connecting portion between an inner box 6 filled with a heat insulating material 6 and an outer box 7 Hold the front opening edge 1 &
This is a part of the high-pressure side piping of the refrigeration system that is heat-transferably arranged inside the refrigeration system.

A part 4 of this high pressure side piping is connected to a condenser 8 and a compressor 9.
, evaporator 10 and capillary tube 11 are connected to the refrigeration system. 12 is a bypass pipe that bypasses part 4 of the high-pressure side piping; 13 is a valve body such as a three-way solenoid valve connected to the outlet of the condenser 8, the part 4 of the high-pressure side piping, and the inlet of the bypass pipe 12; The refrigerant flow is switched to the part 4 side or the bypass pipe 12 side. 14 is a thermostat that is connected in series to the electromagnetic coil 13a of the valve body 13 and installed on the outer surface of the front opening side of the refrigerator body 1. The thermostat 14 opens and closes the contact 14a depending on the temperature of the outer surface of the refrigerator body 1 to control the valve body 13.
control switching. That is, when the outer surface temperature of the refrigerator main body 1 is less than -4° C., which is the difference between the outside temperature and the outer surface temperature of the refrigerator main body 1, the contact 14a is turned off.
, no current flows through the electromagnetic coil 13a, and the valve body 13 is connected to the part 4 of the high-pressure side piping. Further, when the outside surface temperature of the refrigerator body 1 is above the outside temperature +2°GJ, which is the difference between the outside temperature and the outside surface temperature of the refrigerator body 1, the contact 14a is turned ON.
A current flows through the electromagnetic coil 13a, and the valve body 13 is connected to the bypass pipe 12.

In the above embodiment, if the temperature of the outer surface of the refrigerator is below the above-mentioned (outside temperature -4°C) which tends to cause sweating, the thermostat 14 detects this.
opens the contact point 14 and switches the valve body 13 to the part 4 side of the high pressure side piping. Therefore, the refrigerant gas from the compressor 9 is transferred from the condenser 8 to the valve body 13 to the part 4 to the cavity top 11.
It flows to the evaporator 10, and the heat dissipated from the part 4 warms the front opening edge 1a to prevent sweating.

Conversely, when the temperature of the outer surface of the refrigerator becomes -2°GJ above the above-mentioned outside temperature at which sweating is less likely to occur in the refrigerator, the thermostat 14 detects this and closes the contact 142L, and the valve body 1
3 to the bypass pipe 12 side.

Therefore, the refrigerant gas from the compressor 9 flows through the condenser 8 → valve body 13 → bypass pipe 12 → capillary tube 11 → evaporator 10, and does not warm the outer surface of the refrigerator main body 1.

In this way, the present invention provides a part of the high-pressure side piping of the refrigeration cycle to the outer surface of the front opening periphery of the refrigerator body for heat conduction, a bypass path through which the refrigerant bypasses this part, and a bypass path that connects this bypass path to the high-pressure side piping. It is equipped with a valve body that switches the refrigerant flow in a part of the side piping, and a thermostat that controls the switching operation of the valve body when the difference between the outside temperature and the external temperature of the refrigerator body changes above or below a certain value. Because the valve body is only connected to a part of the high-pressure side piping to allow high-pressure refrigerant to flow only when necessary, there is less unnecessary heat leaking into the refrigerator body than before, which reduces the risk of leaking into preserved foods, etc. Not only can adverse effects be prevented, but careless operation of the refrigeration cycle is also reduced, and power consumption can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a rear perspective view of a refrigerator showing an embodiment of the present invention;
FIG. 2 is an enlarged sectional view of the main parts, FIG. 3 is a piping diagram of the refrigerating cycle, and FIG. 4 is an electrical circuit diagram. 1... Refrigerator body, 4... Part of high pressure side piping, 12... Bypass path (bypass pipe), 13...
Three-way solenoid valve (valve body), 14...Thermostat. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 2

Claims (1)

[Claims] A part of the high-pressure side piping of the refrigeration cycle is provided thermally conductively to the outer surface of the front opening periphery of the refrigerator body, and a bypass path through which the refrigerant bypasses the part of the high-pressure side piping;
A valve body that switches the refrigerant flow between this bypass path and a part of the high-pressure side piping, and a thermostat that controls the switching operation of the valve body when the difference between the outside air temperature and the external temperature of the refrigerator body changes above or below a certain value. A refrigerator equipped with