JPS6349146B2 - - Google Patents

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 Structure and Problems Generally, when a rotary compressor is used, a method is often adopted in which the discharged high-temperature, high-pressure refrigerant is reintroduced into the compressor in order to cool the compressor. For example, as shown in FIGS. 1 to 3, a loop-shaped conduit b is installed at a higher position than the compressor a, and this conduit b and the compressor a are communicated so that the high-pressure gas inside the compressor a is A method has been proposed in which the refrigerant is introduced into the conduit b and circulated by the condensation effect and density difference of the refrigerant. The refrigeration cycle consists of a refrigeration cycle in which flow flows from compressor a through condenser c, dryer d, solenoid valve e, capillary tube f, evaporator g, and check valve h to the cylinder in compressor a. . At this time, the inlet side riser pipe i of the loop-shaped conduit b is connected to the refrigerator insulation box j.
The compressor is placed in a heat dissipation duct m of the compressor a, which is composed of a rear surface k and a rear duct cover l, and a return/downstream pipe n of the conduit b is arranged on the side surface o of the insulation box j using aluminum foil p for heat exchange. It was set up. Therefore, since the condensing section of the return downpipe n is at ambient temperature, it has the disadvantage that a sufficient condensing effect cannot be obtained under high outside temperature conditions. q is a return air path for convective cold air from the refrigerator compartment r to the freezer compartment s, and is disposed in the inner box t. U is a heater to prevent overcooling of the refrigerator compartment in winter, and it also has the disadvantage of consuming electrical input because it is disposed in the return air path q.

Purpose of the invention The purpose of the present invention is to improve the drawbacks of the conventional example,
It is an object of the present invention to provide a refrigeration system that reduces the consumption of electrical input by a heater and efficiently cools a compressor.

Structure of the Invention In order to achieve this object, the present invention saves energy by arranging a return pipe of a loop-shaped conduit in a heat exchange manner with a return air passage of cold air arranged in a refrigerator, thereby eliminating the need for a heater to prevent overcooling. 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 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 riser pipe 5 is disposed within a heat dissipation duct 9 that exhausts heat from the compressor 1, which is comprised of a back surface 7 of the refrigerator 6 and a back duct cover 8. It is set up. Further, the return down pipe 10 is disposed in a return air path 14 for returning cold air from the refrigerator compartment 12 disposed in the inner box 11 to the freezer compartment, with 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 a condenser 16, a dryer 17, a solenoid valve 18, a capillary tube 19, an evaporator 20, and an inverter. It constitutes a refrigeration cycle that returns to the cylinder in the compressor 1 via the stop valve 21.

In such a configuration, the high temperature and high pressure refrigerant not only flows into the condenser 15 of the refrigeration cycle but also fills the conduit 2, and the return down pipe 10 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 from the outlet section 4 to the compressor 1.
The return refrigerant temperature is lowered by the lower temperature of the return down pipe 10, and the temperature of the compressor 1 can be kept low, improving the compression efficiency and volumetric efficiency of the refrigerant, improving the cooling capacity, and improving efficiency with less input. Cooling operation can be performed. Furthermore, the heater for preventing overcooling of the cold storage room in winter in the return air passage 11 can be eliminated, thereby reducing power consumption and exhibiting the effect of preventing overcooling of the cold storage room in winter.

Effects of the Invention The present invention connects a conduit formed in a loop shape to the outer shell of a compressor whose interior is kept at high pressure, and an inlet riser pipe of the loop conduit is installed in a heat dissipation duct of a compressor provided on the back of a refrigerator. Since the return down pipe of the loop conduit is arranged to exchange heat with the return air path of cold air inside the refrigerator, the return refrigerant temperature can be kept low by the low temperature of the return down pipe, so the return down pipe of the loop conduit is The condensing effect is improved and the compressor is efficiently cooled, and the loop conduit prevents the return air path from overcooling in the cold storage room in winter, making it possible to eliminate the conventional heater and reduce power consumption.

[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, and FIG. 4 is a refrigerator of an embodiment of the present invention. 5 is a refrigeration cycle diagram of FIG. 4,
FIG. 6 is an external perspective view of the refrigerator shown in FIG. 4. 1... Compressor, 2... Conduit, 5... Inlet side riser pipe, 9... Heat radiation duct, 10... Return down pipe,
14...Return air path.

Claims (1)

[Claims] 1 The inlet and outlet of a loop-shaped conduit are connected to the outer shell of a high-pressure in-shell compressor, and the high-temperature, high-pressure refrigerant that has been discharged outside the compressor is reintroduced into the compressor, and then condensed. In a refrigeration system comprising a refrigeration cycle that returns to a cylinder in a compressor via a capillary, a capillary, and an evaporator, the inlet riser of the loop-shaped conduit is arranged in a heat radiation duct of the compressor provided on the back of the refrigerator, A refrigeration system in which a return pipe of the loop-shaped conduit is arranged in a cold air return circuit within a refrigerator.