Oil-gas separator and compressor

Abstract

The invention provides an oil-gas separator and a compressor, and the oil-gas separator comprises an oil separation tank which is arranged along a vertical line, and the side wall and the bottom of the lower part of the oil separation tank are respectively provided with a through hole; the capillary coil pipe surrounds the periphery of the lower part of the oil separation tank, and an oil inlet pipe of the capillary coil pipe enters the oil separation tank from the through hole and extends to the bottom of the oil separation tank; the outer layer shell is connected to the lower portion of the oil separation tank in a sleeving mode, the capillary coil pipe is jointly packaged by the outer layer shell and the outer wall of the lower portion of the oil separation tank, a deposition gap is formed between the bottom of the outer layer shell and the bottom of the oil separation tank for deposition of separated lubricating oil, and two through holes are formed in the bottom of the outer layer shell and communicate with an oil return pipe and an air inlet pipe correspondingly; the air inlet pipe is inserted into an inner cavity of the oil separation tank from a bottom through hole of the oil separation tank. The capillary coil pipe can be coiled outside the oil separation lower shell, fixing is convenient, the risk that the capillary pipe is broken due to machine vibration is reduced, high-pressure lubricating oil is throttled and depressurized through the capillary pipe structure and conveyed back to the compressor, and the performance and reliability of the compressor are greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of vehicle-mounted refrigeration equipment, and in particular to an oil-gas separator and a compressor. Background Art

[0002] Compared with rolling rotor compressors with high back pressure inside the shell, rolling rotor compressors with low back pressure (i.e. suction pressure) inside the shell have the following advantages: for hydrocarbon refrigerant compressors (such as R290 compressors), the shell of low back pressure compressors has suction pressure, and the solubility of refrigerant in refrigeration oil is low, which can significantly reduce the refrigerant charge. Due to its flammable and explosive properties, reducing the refrigerant charge can improve safety and expand the application range of this type of compressor; for high-pressure refrigerant compressors (such as carbon dioxide compressors), the shell pressure of low back pressure compressors is suction pressure, and the pressure resistance requirement for the shell is low; the compressor motor is inside the shell, and the shell ambient temperature of the low back pressure compressor is low, so the high temperature resistance requirement for the motor is low.

[0003] At present, the lubrication of the moving parts of the low back pressure compressor is mainly achieved in the following way: a lubricating oil pool is provided at the bottom of the compressor, and the bottom of the crankshaft extends into the oil pool. When the compressor is running, the lubricating oil is pumped into the through hole in the middle of the crankshaft by means of a centrifugal pump, and then the lubricating oil is transported to the upper cylinder head, lower cylinder head, piston, blades and other sliding parts through radial oil holes on the crankshaft connected to the through hole.

[0004] The oil return lubrication of low back-pressure compressors has the following problems: the lubricating oil is transported from the radial oil holes of the crankshaft to the sliding parts of the pump body. After lubricating the sliding parts, part of the oil dissolves in the refrigerant and is discharged through the exhaust port of the compressor, which will cause the lubricating oil in the compressor to gradually decrease, thus affecting the performance and reliability of the compressor.

[0005] Therefore, the present invention provides an oil-gas separator and a compressor. Summary of the invention

[0006] In response to the problems in the prior art, the oil-gas separator and compressor of the present invention overcome the difficulties of the prior art. The capillary coil can be coiled outside the lower shell of the oil separator, which is convenient for fixation and reduces the risk of capillary breakage due to machine vibration. The high-pressure lubricating oil is throttled and reduced in pressure through the capillary structure and transported back to the compressor, thereby greatly improving the performance and reliability of the compressor.

[0007] An embodiment of the present invention provides an oil-gas separator, comprising:

[0008] The oil separator tank is arranged along the vertical line, and the side wall and the bottom of the lower part of the oil separator tank are respectively provided with a through hole;

[0009] A capillary coil surrounds the outer circumference of the lower portion of the oil separator tank, and an oil inlet pipe of the capillary coil enters the oil separator tank from the through hole and extends to the bottom of the oil separator tank; and

[0010] The outer shell is sleeved on the lower part of the oil separator tank, and together with the outer wall of the lower part of the oil separator tank, encapsulates the capillary coil. A sedimentation gap is provided between the bottom of the outer shell and the bottom of the oil separator tank for the deposition of the separated lubricating oil. Two through holes are provided at the bottom of the outer shell to respectively connect the return oil pipe and the air intake pipe. The air intake pipe is inserted into the inner cavity of the oil separator tank from the through hole at the bottom of the oil separator tank.

[0011] Preferably, the lower portion of the oil separator tank is provided with an annular recess, the capillary coil is arranged in the annular recess, the outer shell is welded to the lower portion of the oil separator tank, and forms a clamping space with the annular recess for clamping the inner and outer walls of the capillary coil.

[0012] Preferably, the outer circumference of the capillary coil is flush with the oil separator tank.

[0013] Preferably, the oil inlet of the capillary coil is located at the bottom of the coil, and the oil inlet is connected to a first oil inlet pipe, which extends in parallel through a first through hole in the side wall of the lower portion of the oil separator tank and reaches a central area at the bottom of the oil separator tank.

[0014] Preferably, the oil inlet of the capillary coil is located at the top of the coil, and the oil inlet is connected to a second oil inlet pipe, which passes through a second through hole in the side wall of the lower portion of the oil separator tank and extends downward to the central area of ​​the bottom of the oil separator tank.

[0015] Preferably, the oil separator tank is a cylindrical structure, and a first projection of the capillary coil based on the center axis of the oil-gas separator is located above a second projection of the deposition gap based on the center axis of the oil-gas separator.

[0016] Preferably, the air intake pipe is connected to a first oil intake pipe and a second oil intake pipe which are arranged vertically, respectively, and the first oil intake pipe and the second oil intake pipe are connected to an exhaust port of a compressor, respectively.

[0017] Preferably, the oil outlet of the capillary coil is connected to the deposition gap.

[0018] Preferably, the first end of the oil return pipe is connected to a side of the outer shell body close to the oil outlet, and the second end is connected to the compressor.

[0019] An embodiment of the present invention further provides a compressor, comprising the oil-gas separator as described above, wherein the compressor is a rolling rotor compressor with low back pressure (ie, suction pressure).

[0020] The oil-gas separator and compressor of the present invention can coil the capillary coil outside the lower shell of the oil separator, which is convenient for fixing and reduces the risk of capillary breakage caused by machine vibration. The high-pressure lubricating oil is throttled and reduced in pressure through the capillary structure and transported back to the compressor to achieve oil circulation lubrication of the compressor pump body, thereby improving the performance and reliability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the first oil-gas separator of the present invention.

[0023] Figure 2 It is a partial perspective view of the first oil-gas separator of the present invention.

[0024] Figure 3 It is a partial perspective view of a second oil-gas separator of the present invention.

[0025] Reference numerals

[0026] 1 Oil separator

[0027] 11 Annular concave platform

[0028] 2 Outer shell

[0029] 3 Deposition gap

[0030] 4 Capillary coil

[0031] 41 First oil inlet pipe

[0032] 42 Oil outlet

[0033] 43 First through hole

[0034] 44 Second oil inlet pipe

[0035] 45 Second through hole

[0036] 51 First oil separator intake pipe

[0037] 52 Second oil intake pipe

[0038] 53 First End

[0039] 54 Second End

[0040] 55 Oil return pipe DETAILED DESCRIPTION

[0041] The following describes the implementation of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementations, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0043] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.

[0046] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0047] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.

[0048] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0049] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0050] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0051] Figure 1 It is a schematic diagram of the first oil-gas separator of the present invention. Figure 2 1 is a partial perspective view of the first oil-gas separator of the present invention. Figure 1 and 2As shown, the present invention provides an oil-gas separator, comprising: an oil separator tank 1, a capillary coil 4 and an outer shell 2. The oil separator tank 1 is arranged along a vertical line, and a through hole is respectively provided on the side wall and the bottom of the lower part of the oil separator tank 1. The capillary coil 4 surrounds the outer periphery of the lower part of the oil separator tank 1, and the oil inlet pipe of the capillary coil 4 enters the oil separator tank 1 from the through hole and extends to the bottom of the oil separator tank 1. The outer shell 2 is sleeved on the lower part of the oil separator tank 1, and the capillary coil 4 is encapsulated together with the outer wall of the lower part of the oil separator tank 1. A sedimentation gap 3 is provided between the bottom of the outer shell 2 and the bottom of the oil separator tank 1 for the deposition of the separated lubricating oil. The bottom of the outer shell 2 is provided with two through holes respectively connected to the return oil pipe 55 and the air intake pipe, and the air intake pipe is inserted into the inner cavity of the oil separator tank 1 from the through hole at the bottom of the oil separator tank 1. The present invention coils the capillary coil outside the lower shell of the oil separator, which is convenient for fixing on the one hand and reduces the risk of the capillary tube breaking due to vibration during the operation of the machine on the other hand. Finally, the high-pressure lubricating oil is throttled and depressurized through the capillary structure and transported back to the compressor to achieve oil circulation lubrication of the compressor pump body, thereby improving the performance and reliability of the compressor.

[0052] In a preferred embodiment, an annular recess 11 is provided at the lower portion of the oil separator tank 1, and the capillary coil 4 is arranged inside the annular recess 11. The outer shell 2 is welded to the lower portion of the oil separator tank 1 to form a clamping space with the annular recess 11 for clamping the inner and outer walls of the capillary coil 4, but this is not used as an example.

[0053] In a preferred embodiment, the outer circumference of the capillary coil 4 is flush with the oil separator tank 1 , but this is not taken as an example.

[0054] In a preferred embodiment, the oil inlet of the capillary coil 4 is located at the bottom of the coil, and the oil inlet is connected to the first oil inlet pipe 41. The first oil inlet pipe 41 extends in parallel through the first through hole 43 on the side wall of the lower part of the oil separator tank 1 and reaches the central area of ​​the bottom of the oil separator tank 1, but this is not taken as an example.

[0055] In a preferred embodiment, the oil inlet of the capillary coil 4 is located at the top of the coil, and the oil inlet is connected to the second oil inlet pipe 44. The second oil inlet pipe 44 passes through the second through hole 45 on the side wall of the lower part of the oil separator tank 1 and extends downward to the central area of ​​the bottom of the oil separator tank 1, but this is not used as an example.

[0056] In a preferred embodiment, the oil separator tank 1 is a cylindrical structure, and the capillary coil 4 is located above the second projection of the sedimentation gap 3 based on the center axis of the oil-gas separator based on the first projection of the center axis of the oil-gas separator, but this is not taken as an example.

[0057] In a preferred embodiment, the air intake pipe is connected to a first oil intake pipe 51 and a second oil intake pipe 52 arranged vertically, respectively, and the first oil intake pipe 51 and the second oil intake pipe 52 are connected to the exhaust port of the compressor respectively, but this is not taken as an example.

[0058] In a preferred embodiment, the oil outlet 42 of the capillary coil 4 is connected to the deposition gap 3, but this is not taken as an example.

[0059] In a preferred embodiment, the first end 53 of the oil return pipe 55 is connected to a side of the outer shell 2 close to the oil outlet 42, and the second end 54 is connected to a compressor, but this is not used as an example.

[0060] Continue to refer Figure 1 and 2 The oil-gas separator includes: a capillary coil 4, an oil return pipe 55, and an oil separator tank 1 body, wherein the oil inlet of the capillary coil 4 is located at the bottom of the coil, and the oil inlet is connected to the first oil inlet pipe 41, and the first oil inlet pipe 41 extends parallel to the first through hole 43 of the side wall of the lower part of the oil separator tank 1 and reaches the central area of ​​the bottom of the oil separator tank 1. First, the high-pressure gas discharged after the compressor is running enters the oil separator tank 1 through the first oil separator air inlet pipe 51 and the second oil separator air inlet pipe 52, and the lubricating oil mixed in the high-pressure refrigerant gas also enters the oil separator tank 1 through the air inlet. The lubricating oil and the refrigerant gas are separated in the oil-gas separator, and the oil is deposited at the bottom of the oil separator tank 1 and is pressed into the capillary tube 4 by high pressure, and the capillary coil 4 is throttled and depressurized, and the oil is sent back to the compressor through the oil return pipe 55. In order to maintain the reliability of the capillary coil 4 and store part of the oil, a shell cover is welded on the outside of the capillary coil 4, which also reduces the risk of capillary breakage caused by vibration, but this is not an example.

[0061] Figure 3 1 is a partial perspective view of the second oil-gas separator of the present invention. Figure 3 As shown, the difference between the second oil-gas separator of the present invention and the first oil-gas separator is that the capillary coil takes in oil from the top, the oil inlet of the capillary coil 4 is located at the top of the coil, and the oil inlet is connected to the second oil inlet pipe 44. The second oil inlet pipe 44 passes through the second through hole 45 on the side wall of the lower part of the oil separator tank 1 and then extends downward to the central area of ​​the bottom of the oil separator tank 1, but this is not used as an example.

[0062] The embodiment of the present invention further provides a compressor, comprising the above-mentioned oil-gas separator, wherein the compressor is a rolling rotor compressor with low back pressure (ie, suction pressure). The relevant technical features are as described above and will not be repeated here.

[0063] In summary, the oil-gas separator and compressor of the present invention can coil the capillary coil outside the lower shell of the oil separator, which is convenient for fixation and reduces the risk of capillary breakage caused by machine vibration. The high-pressure lubricating oil is throttled and reduced in pressure through the capillary structure and transported back to the compressor to achieve oil circulation lubrication of the compressor pump body, thereby improving the performance and reliability of the compressor.

[0064] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An oil-gas separator, characterized in that: include: The oil separator tank (1) is arranged along a vertical line, and the side wall and the bottom of the lower part of the oil separator tank (1) are each provided with a through hole; A capillary coil (4) surrounds the outer periphery of the lower portion of the oil separator tank (1), and an oil inlet pipe of the capillary coil (4) enters the oil separator tank (1) from the through hole and extends to the bottom of the oil separator tank (1); and The outer shell (2) is sleeved on the lower part of the oil separator tank (1) and together with the outer wall of the lower part of the oil separator tank (1) encapsulates the capillary coil (4). A sedimentation gap (3) is provided between the bottom of the outer shell (2) and the bottom of the oil separator tank (1) for the separated lubricating oil to be deposited. The bottom of the outer shell (2) is provided with two through holes respectively connected to the return oil pipe (55) and the air intake pipe. The air intake pipe is inserted into the inner cavity of the oil separator tank (1) from the through hole at the bottom of the oil separator tank (1).

2. The oil-gas separator according to claim 1, characterized in that: The lower part of the oil separator tank (1) is provided with an annular concave platform (11), the capillary coil (4) is arranged in the annular concave platform (11), and the outer shell (2) is welded to the lower part of the oil separator tank (1) to form a clamping space for clamping the inner wall and the outer wall of the capillary coil (4) together with the annular concave platform (11).

3. The oil-gas separator according to claim 2, characterized in that: The outer periphery of the capillary coil (4) is flush with the oil separator tank (1).

4. The oil-gas separator according to claim 2, characterized in that: The oil inlet of the capillary coil (4) is located at the bottom of the coil, and the oil inlet is connected to a first oil inlet pipe (41). The first oil inlet pipe (41) extends in parallel through a first through hole (43) in the side wall of the lower part of the oil separator tank (1) and reaches the central area of ​​the bottom of the oil separator tank (1).

5. The oil-gas separator according to claim 2, characterized in that: The oil inlet of the capillary coil (4) is located at the top of the coil, and the oil inlet is connected to a second oil inlet pipe (44). The second oil inlet pipe (44) passes through a second through hole (45) in the side wall of the lower part of the oil separator tank (1) and extends downward to the central area of ​​the bottom of the oil separator tank (1).

6. The oil-gas separator according to claim 1, characterized in that: The oil separation tank (1) is a cylindrical structure, and the capillary coil (4) is located above the second projection of the deposition gap (3) based on the center axis of the oil-gas separator based on the first projection of the center axis of the oil-gas separator.

7. The oil-gas separator according to claim 1, characterized in that: The air intake pipe is respectively connected to a first oil intake pipe (51) and a second oil intake pipe (52) arranged vertically, and the first oil intake pipe (51) and the second oil intake pipe (52) are respectively connected to an exhaust port of a compressor.

8. The oil-gas separator according to claim 1, characterized in that: The oil outlet (42) of the capillary coil (4) is connected to the deposition gap (3).

9. The oil-gas separator according to claim 8, characterized in that: The first end (53) of the oil return pipe (55) is connected to a side of the outer shell (2) close to the oil outlet (42), and the second end (54) is connected to the compressor.

10. A compressor, characterized in that: Comprising the oil-gas separator as claimed in claim 1.

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