JPH0255634B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an inner-shell high-pressure horizontal rotary compressor in a refrigeration system used in a refrigerator or the like.

Conventional configuration and its problems As a cooling method for the above-mentioned shell-internal high-pressure type horizontal rotary compressor a, a loop-shaped conduit b is arranged at a higher position than the compressor a, as shown in Fig. 1. A method has been proposed in which this conduit b and the compressor a are connected, and the high pressure gas inside the compressor a is guided into the conduit b and circulated by the condensation effect and density difference of the refrigerant. The high-pressure type horizontal rotary compressor a in the outer shell is divided into a machine room side d and a motor room side e by a cylinder block c, and the refrigerant flows through the cylinder f and the discharge cover g to the machine room side d. The refrigerant is discharged to the high pressure side h of the refrigeration system and returns from the low pressure side i of the refrigeration system. The high-pressure refrigerant also flows into the loop-shaped conduit b, and heat is exchanged with the condensation part k of the loop-shaped conduit b using an aluminum foil j on the back of the refrigerator (not shown) to reduce the refrigerant in the loop-shaped conduit b. Refrigerant is circulated by density difference. The machine room side d is in a state where a mist of refrigerant gas discharged from the cylinder f and refrigerating machine oil is mixed, and at the rising part l of the loop-shaped conduit b, the refrigerating machine oil adheres to the inside of the pipe, causing a loop-shaped conduit. This has the disadvantage that a satisfactory cooling effect cannot be obtained because the refrigerant circulation in the conduit b is obstructed.

Purpose of the invention The purpose of the present invention is to improve the drawbacks of the conventional example,
An object of the present invention is to provide a rotary compressor that can efficiently cool the compressor.

Structure of the Invention In order to achieve this object, the present invention shrink-fits a cylinder block of a horizontal rotary compressor to an outer shell, and divides the cylinder block into a machine room side and a motor room side, and the motor room side has a By installing the pipe into a loop-shaped conduit having a condensing section and circulating only the refrigerant through this conduit, an efficient cooling effect of the compressor can be obtained.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a horizontal rotary compressor whose interior is maintained at high pressure, and is composed of a cylinder 2, a discharge cover 3, a bearing 4, a piston 5, a motor 6, etc., and a cylinder block 7 is connected to the compressor 1. The inside is divided into a machine room side 9 and a motor room side 10. The refrigerant is compressed in the cylinder 2, discharged from the discharge cover 3 to the machine room side 9, flows to the high pressure side 10 of the refrigeration cycle, and returns to the cylinder 2 via the capillary tube 11 and the low pressure side 12, forming a refrigeration cycle. Reference numeral 13 denotes a loop-shaped conduit, and an aluminum foil 14 is placed on the back of the refrigerator (not shown) so as to exchange heat between the condensing part 15 of the loop-shaped conduit 13 and the inlet part 16 of the loop-shaped conduit 13. Exit part 1
7 is piped to the motor chamber side 10 of the compressor 1. Further, a rising pipe 18 between the condensing section 15 and the inlet section 16 is buried in a heat insulating material (not shown) of the refrigerator.

In such a configuration, the high-temperature, high-pressure refrigerant is not only discharged to the high-pressure side 10 of the refrigeration cycle, but also fills the inside of the loop-shaped conduit 13,
Since the section between the condensing section 15 and the inlet section 16 of the loop-shaped conduit 13 is buried within the heat insulating material of the refrigerator, a temperature difference occurs between the rising pipe 18 and the condensing section 15.
The refrigerant is liquefied in the condensing section 15 and circulates through the loop-shaped conduit 13 due to this density difference, and the liquefied refrigerant returns to the compressor 1 from the outlet section 17 to cool the compressor 1. The machine room side 9 is filled with a large amount of mist-like refrigerating machine oil in the refrigerant gas discharged from the discharge cover 3, whereas the motor room side 10 is filled with a large amount of mist-like refrigerating machine oil, and the loop-shaped conduit 13 is filled with a small amount of mist-like refrigerating machine oil. Effective cooling of the compressor is achieved without interfering with refrigerant circulation.

Effects of the Invention As is clear from the above description, the present invention has a cylinder block attached to the outer shell of a horizontal rotary compressor whose internal pressure is maintained at high pressure with a shrinkage spring, so that the cylinder block can be connected to the machine room side and the motor room side. Since the inlet and outlet of a loop-shaped conduit with both ends open are installed on the motor room side, the amount of refrigerant machine oil contained in the discharged refrigerant gas on the motor room side is smaller than on the machine room side. Therefore, the refrigerating machine oil in the form of mist does not adhere to the inside of the loop-shaped conduit and obstruct the circulation of the refrigerant, and the effective cooling effect of the natural convection type compressor can be exerted.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional refrigeration system, and FIG. 2 is a circuit diagram of a refrigeration system according to an embodiment of the present invention. 7... Cylinder block, 9... Machine room, 10
...Motor room, 13...Loop-shaped conduit.

Claims (1)

[Claims] 1. A loop-shaped conduit which is divided into a machine room side and a motor room side by shrink-fitting a cylinder block to the outer shell of a horizontal rotary compressor whose interior is maintained at high pressure, and with both ends open to the motor room side. A refrigeration system with piping between an inlet and an outlet.