JPH0517459U - Refrigerant circuit oil separator - Google Patents

Abstract

(57) [Abstract] [Purpose] To achieve an oil separator for a refrigerant circuit that has high oil separation efficiency, is relatively small, and is easy to connect pipes, and therefore has excellent circuit cooling performance and economy. The inner diameter D of the inlet pipe 010 is larger than the outer diameter d of the outlet pipe 011 and the inlet pipe 010 and the outlet pipe 011 are coaxially wrapped and arranged, and the inner surface of the inlet pipe 010 and the outlet pipe 011 are arranged.
The vibrating mechanism 1 is attached to the inlet pipe 010 and the outlet pipe 011 of the oil separator 012 of the refrigerant circuit in which a cylindrical clearance having an appropriate length is formed between the oil separator 012 and the outer surface thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an oil separator for a refrigerant circuit.

[0002]

[Prior Art]

 For example, as a refrigerant circuit of a large-scale air conditioner, conventionally, as shown in the circuit diagram of FIG. 3, a high-temperature and high-pressure gas refrigerant discharged from a compressor 01 passes through an inlet pipe 02, an oil separator 03, and an outlet pipe 04. It flows into the condenser 05, liquefies by heat dissipation, and the liquid refrigerant is throttled adiabatically expanded to a low pressure at 06, and vaporized by heat absorption at the evaporator 07 and returned to the compressor 01 as a low-pressure gas. It has been known. In this type of refrigerant circuit, internal lubricating oil (hereinafter referred to as oil) is discharged from the compressor 01 together with the refrigerant gas to burn the sliding portion of the compressor 01, or the discharged oil is condensed by the compressor 05 or the evaporator. Since there is a risk that it will adhere to the inside of the heat transfer tube of the vessel 07 and become thermal resistance and reduce their performance, the oil separator 03 separates the oil discharged from the compressor 01, and the separated oil is the oil. It is returned to the suction pipe of the compressor 01 through the discharge pipe 08, the throttle 09, and the like. (1) However, since such an oil separator 03 is a vertical cylinder type cyclone type, the gas flow velocity inside is large, and the oil collected on the inner wall of the cylindrical housing is re-scattered into small oil droplets. Since the oil is discharged from the outlet pipe 04, the oil separation efficiency is relatively low, and when the performance is improved, the main body becomes large, and the inlet pipe 02 and the outlet pipe 04 have an orthogonal positional relationship. However, it has a troublesome drawback. (2) Therefore, the present applicant previously proposed “oil separator” in Japanese Utility Model Application No. 62-175813. As shown in the vertical cross-sectional view of FIG. 4, it is "in an oil separator that is inserted into the discharge pipe of a compressor and separates oil contained in the refrigerant gas, the inner diameter D of the inlet pipe 010 is outside the outlet pipe 011. The diameter is larger than the diameter d, and the inlet pipe 010 and the outlet pipe 011 are coaxially wrapped and arranged, and a cylindrical clearance is provided between the inner surface of the inlet pipe 010 and the outer surface of the outlet pipe 011. The oil separator 012 "is characterized in that 015 is formed. In such an oil separator 012, the refrigerant gas 013 flows in the center portion of the inlet pipe 010 at a relatively high speed, and the oil 014 flows in the peripheral portion at a relatively low speed, so that the refrigerant gas 013 flows into the outlet pipe 011. The oil 014 is separated by flowing in and flowing out of the outlet pipe 011.

However, such a structure has the following drawbacks. (1) Since the oil 014 accumulated at the tip of the inlet pipe 010 is not sufficiently drained into the oil separator 012, the oil 014 is drawn into the refrigerant gas 013 and drawn into the outlet pipe 011 and thus the oil separation is performed. The efficiency of the vessel decreases. (2) Since a small amount of oil 014 drawn into the outlet pipe 011 by the refrigerant gas 013 adheres to the heat transfer pipes such as the condenser 05, the performance of the heat exchanger deteriorates.

[0004]

[Problems to be solved by the device]

 The present invention has been proposed in view of such circumstances, and has a high oil separation efficiency, a relatively small size, easy piping connection, and therefore an oil for a refrigerant circuit having excellent circuit cooling performance and economy. The purpose is to provide a separator.

[0005]

[Means for Solving the Problems]

 Therefore, in the present invention, the inner diameter of the inlet pipe is larger than the outer diameter of the outlet pipe, and the inlet pipe and the outlet pipe are coaxially wrapped and disposed, and the inner surface of the inlet pipe and the outer surface of the outlet pipe are In an oil separator of a refrigerant circuit in which a tubular clearance having an appropriate length is formed between the oil separators, a vibrating mechanism is attached to the inlet pipe and / or the outlet pipe.

[0006]

[Action]

 With the above-described configuration, it is possible to obtain an oil separator for a refrigerant circuit which has a high oil separation efficiency, is relatively small in size, can be easily connected to a pipe, and is therefore excellent in circuit cooling performance and economy.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The same reference numerals as those in FIGS. 3 to 4 denote the same members as those in the drawings, and in the vertical sectional view of FIG. 1 and the partially enlarged view of FIG. Reference numeral 1 denotes a vibrating mechanism attached to the outer surface of the tip end of the inlet pipe 010 penetrating the oil separator 012 and the outer surface of the middle portion of the outlet pipe 011. The vibrating mechanism includes a casing 2, a piezoelectric actuator and a giant magnetostrictive actuator. It is composed of a vibrator 3 and a vibration hammer 4. Reference numeral 5 is a control mechanism for controlling the frequency of the vibrating mechanism 1, which is composed of an oscillator 6 and a variable frequency controller 7.

In such an apparatus, as shown in FIG. 2, the vibration frequency of the oscillator 6 is changed by each variable frequency controller 7 so that the vibration frequency falls within a predetermined vibration frequency range centered on the natural frequency of the oil separator. When the frequency of the vibration mechanism 1 is periodically changed with, the inlet pipe 010 is efficiently vibrated by the vibration mechanism 1 attached to the outside of the inlet pipe 010, as shown in FIG. Oil out of the inlet pipe 010 of the oil 014 that adheres to the inner surface and drops into the oil separator 012 through the clearance 015 is improved. Further, the small amount of oil 014 that has flown into the outlet pipe 011 of the oil separator 012 together with the refrigerant gas 013 is generated by vibrating the outlet pipe 011 by the vibrating mechanism 1 attached to the outer surface of the outlet pipe 011. It does not adhere to it and circulates in the refrigerant circuit together with the refrigerant gas 013. The vibration mechanism 1 may be attached to either the inlet pipe 010 or the outlet pipe 011 of the oil separator 012 or may be attached to the main body of the oil separator 012.

According to the apparatus of this embodiment, the following effects can be obtained. (1) The inner diameter of the inlet pipe is larger than the outer diameter of the outlet pipe, and the inlet pipe and the outlet pipe are coaxially wrapped and arranged, and between the inner surface of the inlet pipe and the outer surface of the outlet pipe. Since a cylindrical clearance of appropriate length is formed in the cylinder, it is possible to separate cooling gas and oil with a simple structure, thus making it possible to downsize the oil separator body and facilitate oil separator pipe connections. Become. (2) In the oil separator of (1) above, a vibrating mechanism is attached, which accelerates oil depletion from the oil inlet pipe into the oil separator, thus improving the oil separation performance and improving the outlet. The oil that has flowed into the pipe is less likely to adhere to the outlet pipe, etc., thus improving the performance of the heat exchanger.

[0010]

[Effect of the device]

 In short, according to the present invention, the inner diameter of the inlet pipe is larger than the outer diameter of the outlet pipe, and the inlet pipe and the outlet pipe are coaxially wrapped and arranged, and the inner surface of the inlet pipe and the outer surface of the outlet pipe are In the oil separator of the refrigerant circuit in which a tubular clearance of an appropriate length is formed, by adding a vibration mechanism to the inlet pipe and / or the outlet pipe, the oil separation efficiency is high, and the pipe size is relatively small. INDUSTRIAL APPLICABILITY The present invention is extremely useful in industry because it provides an oil separator for a refrigerant circuit that is easy to connect and thus has excellent circuit cooling performance and economy.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a circuit diagram showing an oil separator of a known refrigerant circuit.

FIG. 4 is a vertical sectional view showing the oil separator of the refrigerant circuit proposed by the present applicant.

[Explanation of symbols]

 1 Vibration Mechanism 2 Casing 3 Vibrator 4 Vibration Hammer 5 Control Mechanism 6 Oscillator 7 Variable Frequency Controller 08 Oil Discharge Pipe 010 Inlet Pipe 011 Outlet Pipe 012 Oil Separator 013 Refrigerant Gas 014 Oil 015 Clearance D Inner Diameter d Outer Diameter

Claims (1)

[Scope of utility model registration request] 1. The inner diameter of the inlet pipe is larger than the outer diameter of the outlet pipe, and the inlet pipe and the outlet pipe are coaxially wrapped and arranged between the inner surface of the inlet pipe and the outer surface of the outlet pipe. An oil separator for a refrigerant circuit having a tubular clearance of an appropriate length, wherein an oscillating mechanism is attached to the inlet pipe and / or the outlet pipe.