JPS60129577A - 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 Field of the Invention The present invention relates to a refrigeration system using an in-shell high-pressure type compressor, that is, a rotary compressor.

Conventional Structures and Problems Generally, when a rotary compressor is used, a method is often adopted in which high-temperature, high-pressure refrigerant that has been discharged is reintroduced into the compressor in order to cool the compressor. For example, as shown in Figs. 1 to 3, a loop-shaped conduit is installed at a higher position than compressor a, and this conduit communicates with compressor a, so that the high pressure inside compressor a is A practical method has been proposed in which gas is introduced into the conduit and circulated by the condensation effect and density difference of the refrigerant. The refrigeration cycle constitutes a refrigeration cycle in which water flows from the compressor a through a condenser C2, a dryer d, a solenoid valve e5, a capillary tube f, an evaporator q, and a check valve, and then to a cylinder in the compressor a. At this time, the inlet side riser pipe i of the loop-shaped conduit is arranged inside the heat dissipation duct m of the compressor a, which is composed of the back of the refrigerator insulation box j and the back duct cover 1, and the return down pipe of the conduit is arranged. n was disposed on the side surface 0 of a heat insulating box j using aluminum foil p for heat exchange. However, since the condensation section of the return downpipe n is at ambient temperature, it has the disadvantage that a sufficient condensation effect cannot be obtained under high outside temperature conditions. q is the air path where convective cold air returns from the refrigerator compartment r to the freezer compartment, and the inner box i
It is located in U is used to prevent overcooling of the refrigerator compartment in winter, and it also has the disadvantage of consuming electrical input because it is placed in the return air path q.

OBJECTS OF THE INVENTION An object of the present invention is to provide a refrigeration system that improves the drawbacks of the conventional example, reduces the consumption of electrical input by the heater, and cools the compressor efficiently.

Structure of the Invention In order to achieve this object, the present invention saves energy by arranging a loop-shaped return pipe in a heat exchange manner with a cold air return path provided in a refrigerator, thereby eliminating the need for a heater to prevent proper cooling. The objective is to achieve a cooling effect of the compressor with good condensation effect in the return down pipe and efficient cooling effect.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 4 to 6.

In the figure, reference numeral 1 denotes a high-pressure compressor in an outer shell, and an inlet part 3 and an outlet part 4 of a conduit 2 formed in a loop shape are connected to the outer shell of the compressor 1. This loop-shaped conduit 2 extends vertically, and its inlet side riser pipe 5 connects to the compressor 1, which is comprised of a back surface 7 of the refrigerator 6 and a back duct cover 8.
It is arranged in a heat dissipation duct 9 that exhausts the heat. Further, the return down pipe 1o is disposed in a return air passage 14 for returning cold air from the refrigerator compartment 12 disposed in the inner box 11 to the freezing compartment, using aluminum foil 15 for heat exchange. The refrigeration cycle starts from a cylinder (not shown) in the compressor 1, passes through the outer shell 1a (not shown), and then passes through the condenser 16. Dryer 17° Solenoid valve 182 Capillary tube 1
9. Evaporator 20. It constitutes a refrigeration cycle that returns to the cylinder in the compressor 1 via the check valve 21.

In such a configuration, the high-temperature, high-pressure refrigerant not only flows into the condenser 15 of the refrigeration cycle but also fills the conduit 2, and the return downpipe 1o is arranged to exchange heat with the return air path 14. Therefore, the refrigerant circulates within the conduit 2 with sufficient condensation effect. Then, the liquefied refrigerant flows through the outlet section 4.
The refrigerant returns to the compressor 1 as the temperature of the down pipe 10 is lower, and the temperature of the compressor 1 can be kept low, so the compression efficiency of the refrigerant improves. Enables efficient cooling operation with less. Furthermore, the heater for preventing people from leaving the cold storage room in the winter in the return air path 11 can be eliminated, reducing power consumption and providing the effect of preventing overcooling in the cold storage room in the winter.

Effects of the Invention The present invention connects a loop-shaped conduit to the outer shell of a compressor whose interior is kept at high pressure, and connects the inlet riser pipe of the loop conduit to the inside of the compressor's heat dissipation duct, which is provided on the back of the refrigerator. Since the lower return conduit of the loop conduit is arranged in a heat exchange manner with the return air passage for cold air inside the refrigerator, the temperature of the return refrigerant can be kept low to the extent that the temperature of the return downward conduit is low. The condensing effect of the conduit is improved and the compressor is efficiently cooled, while the loop conduit prevents overcooling of the cold room in the winter in the return air path, making it possible to eliminate the conventional heater and reduce power consumption. can.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional refrigerator, Fig. 2 is a refrigeration cycle diagram of Fig. 1, Fig. 3 is an external perspective view of the refrigerator of Fig. 1,
4 is a sectional view of a refrigerator according to an embodiment of the present invention, FIG. 5 is a refrigeration cycle diagram of FIG. 4, and FIG. 6 is an external perspective view of the refrigerator of FIG. 4. 1... Compressor, 2... Conduit, 6...
...Inlet side riser pipe, 9... Heat dissipation duct, 1
o... Return down pipe, 14... Return air path. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1R3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A conduit formed in a loop shape is connected to a high-pressure compressor inside the outer shell, and an upright tube on the inlet side of the loop conduit is placed in the heat dissipation duct of the compressor provided on the back of the refrigerator. A refrigeration system in which a lower return conduit is arranged in the cold air return circuit inside the refrigerator.