JPS63271073A - Oil separator - 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 an oil separator that separates refrigerating machine oil contained in refrigerant gas discharged from a compressor of a refrigeration I1J device.

BACKGROUND OF THE INVENTION A conventional oil separator will be explained with reference to FIG. 1 is the torso,
2 is a double lid, 3 is a lower lid, 4 is an artificial pipe, 5 is an outlet pipe, 6 is an oil return pipe, 7 is a plate-shaped internal partition that divides the inside of the body 1 into upper and lower parts, 8 is a steel wool etc. It's a filter. In a main body 9 consisting of a body 1, an upper lid 2, and a lower lid 3, an artificial tube 4 is installed at the center of the lid 2 so as to communicate with the inside of the main body 9. An outlet pipe 5 is installed in the center of the lower lid 3 at a position where it passes through the lower lid 3 and opens near an internal partition wall 7 installed above the body 1, and an oil return pipe 6 to the lower lid 3 is connected to the main body 9. It is installed in communication with the interior. Steel wool 8 is filled between the upper lid 2 and the internal partition wall 7 in the main body 9. The internal partition wall 7 is provided with communication holes 10 at equal rotation angles. The diameter of the circle inscribed with each communication hole 10 is larger than the outer diameter of the artificial tube 2.

Next, the operation of the above configuration will be explained. When a mixture of refrigerant gas containing atomized refrigerating machine oil flows in from the artificial pipe 2, the mixture hits the steel wool 8, and the refrigerating machine oil adheres to the steel wool 8, causing the refrigerant gas to Refrigerating machine oil is separated. The separated refrigerant gas and refrigerating machine oil flow to the lower part of the main body 9 through the communication holes 10 of the internal partition wall 7 in a state where they are separated into gas and liquid. Here, the refrigerating machine oil accumulates in the lower part of the main body and flows to the outside through the oil return pipe 6. The refrigerant gas also flows out through the outlet pipe 3 which opens near the lower part of the internal partition wall 7.

Problems to be Solved by the Invention However, such conventional oil separators have sufficient oil separation ability when the concentration of refrigerating machine oil contained in the air-fuel mixture is low, but when the concentration of refrigerating machine oil is high, In this case, the amount of refrigerating machine oil that passes through the steel wool becomes larger than the refrigerating machine oil that adheres to the steel wool, and the refrigerant gas remains contained in the refrigerant gas and flows out as a mixture. In addition to not being able to provide a sufficient flow area due to the holes, the steel wool is impregnated with a large amount of refrigerating machine oil, which further reduces the flow area and increases pressure loss.

The present invention improves the above-mentioned conventional problems, and makes it possible to sufficiently separate oil without increasing pressure loss even in a refrigerant mixture containing a large amount of refrigerating machine oil. .

Means for Solving the Problem In order to achieve this object, the present invention comprises a main body consisting of an upright cylindrical body, an upper cover and a lower cover that seal the upper and lower ends of this body, respectively, and a main body that includes the above-mentioned body within this main body. a cylindrical internal partition constituting a filter that is installed concentrically with the body; an outlet pipe that is attached to the center of the upper cover so as to communicate with the inside of the internal partition; and an inlet that is attached to the outer periphery of the approximately central portion of the body. tube and
The oil return pipe is located between the body and the internal partition, communicates with the inside of the body, and is attached to the lower lid.

Effect of the present invention With the above-described configuration, the mixture of refrigerant gas and refrigerating machine oil flowing from the artificial pipe causes a vortex within the main body, and the centrifugal force caused by the flow of the mixture separates the refrigerant gas and refrigerating machine oil. The refrigerating machine oil that remains when the air-fuel mixture passes through the partition wall also adheres to the internal partition wall and is further separated, and after passing through this two-stage oil separation, the refrigerant gas is sent to the outlet pipe or to the S purge'.

This makes it an oil separator with high oil separation ability.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 11 denotes an oil separator according to an embodiment of the present invention, the outer shell of which is formed by a cylindrical body 12, an upper lid 13, and a lower lid 14. The interior has a cylindrical shape with its center concentric with the body 12, is fixed by an upper cover 13 and a lower cover 14, and has an internal partition wall 15 formed of a filter material such as steel wool that allows fluid to pass between the inner and outer surfaces. . 16 is the artificial tube,
It is installed tangentially to the outer periphery of the body 12 at the center of the body 12, opens to the inner surface of the body 12, and communicates with the inside of the oil separator 11. 17 is an outlet pipe, which connects the internal partition wall 1 at the center of the upper lid 13.
5 and communicates with the inside of the oil separator 11. 18 is an oil return pipe, which is connected to the body 1 on the inner surface of the lower lid 14.
2 and the oil separator 1 is opened and installed on the outside of the internal partition wall 15.
It communicates with 1.

19 is a compressor, 20 is a condenser, 21 is an expansion valve, 26Ao
- Di 2 is an evaporator, compressor 19. Oil separator 11° condenser 20. Expansion valve 21. The evaporator 22 is connected to the ring to form a refrigeration cycle. The oil return pipe 18 is connected to the suction pipe 19A of the compressor 19 via a capillary tube 23.

Next, the operation of the above configuration will be explained. Refrigerant gas discharged from the compressor 19 flows into the oil separator 11 through the inlet pipe 16. Since the inlet pipe 16 is attached to the center of the body 12 of the oil separator 11 in a tangential direction to the outer periphery of the body 12, the inflowing refrigerant gas forms a vortex inside the oil separator 11 along the inner surface of the body 12. It flows. Therefore, the refrigerating machine oil in the refrigerant gas adheres to the inner wall surface of the body 12 due to the centrifugal force caused by the vortex flow of the refrigerant gas. By this action, most of the refrigerating machine oil in the refrigerant gas is separated from the refrigerant gas. Here, the first stage of oil separation is performed, and the refrigerant gas, in which the concentration of refrigerating machine oil in the refrigerant gas is reduced, passes through the internal partition wall 15 next. When passing through the internal partition wall 15, the refrigerating machine oil contained in the refrigerant gas adheres to the internal partition wall 15 and is separated.

At this time, 7Ao-ji.

Since the flow path area through which the refrigerant gas passes is sufficiently large and the flow rate of the refrigerant gas is slow, pressure loss is small and oil separation efficiency is improved. The refrigerant gas then exits the oil separator 11 through the outlet pipe 17 and reaches the condenser 20. Oil separator IJ
The refrigerating machine oil separated by is collected at the bottom of the oil separator 11,
The amount of oil returned from the oil return pipe 18 is adjusted by the capillary tube 23 and returned to the compressor 19 from the suction pipe 19A.

Therefore, the refrigerating machine oil discharged from the compressor 19 is completely separated from the oil by the oil separator 11, and even if the amount of the refrigerating machine oil discharged increases, the oil separation efficiency does not decrease so much that pressure loss does not increase.

Effects of the Invention As is clear from the above embodiments, the oil separator of the present invention includes a main body consisting of an upright cylindrical body, an upper cover and a lower cover that respectively seal the upper and lower ends of this body, and the above-mentioned a cylindrical internal partition constituting a filter installed concentrically with the body; an outlet pipe attached to the center of the upper cover so as to communicate with the interior of the internal partition; and an outlet pipe attached to the outer periphery of the substantially central portion of the body. , an oil return pipe located between the body and the internal partition, communicating with the body and attached to the lower cover;
The refrigerating machine oil contained in the refrigerant gas is separated because the oil separator performs a two-stage oil separation in which the refrigerating machine oil is separated by the centrifugal force caused by the vortex of the refrigerant gas generated inside the oil separator, and then the refrigerating machine oil is further separated by an internal partition wall. The efficiency is very high, and oil separation can be performed without problems even in a compressor that discharges a large amount of refrigerating machine oil, and there is no possibility that refrigerating machine oil will flow into the condenser or evaporator and reduce the heat exchange capacity. In addition, since there is no increase in pressure loss, stable cooling operation can be maintained at all times, and refrigerating machine oil can be returned stably to the compressor, so there is no possibility of compressor failure due to lack of refrigerating machine oil in the compressor, which is extremely effective. It is large.

[Brief explanation of the drawing]

Fig. 1 is a central cross-sectional view of an oil separator according to an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along the line AA' in Fig. 1, and Fig. 3 is a cross-sectional view of an oil separator 2 shown in Fig. 1. Refrigeration equipment cooling system diagram, No. 4
The figure is a central sectional view of a conventional oil separator. 11-oil separator, 12-body, 13-upper cover, 14-lower cover, 15-internal partition, 16-artificial pipe, 17-outlet pipe, 1
8-Oil return pipe. Name of agent Patent attorney Toshio Nakachi 1 person//-11 grapes 881 milk Figure 1 12-Worst salary 11---Liao division one milk/6---Population kite/7---Deguchi Hou 13-1-oi] Return Officer Figure 3

Claims (1)

[Claims] A main body consisting of an upright cylindrical body, an upper cover and a lower cover that respectively seal the upper and lower ends of this body, and a cylindrical internal partition wall constituting a filter that is installed within the main body concentrically with the body; An outlet pipe attached to the center of the upper cover so as to communicate with the interior of the internal partition; an inlet pipe attached to the outer periphery of the approximately central portion of the body; and an inlet pipe located between the body and the internal partition and communicating with the inside of the body. An oil separator consisting of an oil return pipe attached to the lower cover.