Oil and gas separator and compressor

Abstract

The present application provides an oil-gas separator and a compressor, wherein the oil-gas separator comprises an oil separation tank arranged along a vertical line, a side wall and a bottom of a lower part of the oil separation tank each being provided with a through hole; a capillary coil surrounding an outer periphery of the lower part of the oil separation tank, an oil inlet pipe of the capillary coil entering the oil separation tank from the through hole and extending to the bottom of the oil separation tank; an outer shell sleeved on the lower part of the oil separation tank, the outer shell and an outer wall of the lower part of the oil separation tank together encapsulating the capillary coil, a deposition gap being provided between the bottom of the outer shell and the bottom of the oil separation tank for depositing separated lubricating oil, the bottom of the outer shell being provided with two through holes for respectively communicating with an oil return pipe and an air inlet pipe, the air inlet pipe being inserted into an inner cavity of the oil separation tank from a bottom through hole of the oil separation tank. The present application can coil the capillary coil outside the oil separation lower shell to facilitate fixation and reduce the risk of capillary fracture caused by machine vibration, throttle and depressurize high-pressure lubricating oil through the capillary structure, and deliver the lubricating oil back to the compressor, thereby greatly improving the performance and reliability of the compressor.

Description

TECHNICAL FIELD

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

[0002] The low-back pressure (i.e. suction pressure) rolling rotor compressor inside the shell has the following advantages compared with the high-back pressure rolling rotor compressor inside the shell: for a hydrocarbon refrigerant compressor (such as an R290 compressor), the low-back pressure compressor has a suction pressure inside the shell, the solubility of the refrigerant and the refrigeration oil is low, which can significantly reduce the refrigerant charge, and due to the flammable and explosive characteristics, reducing the refrigerant charge can improve safety and expand the application range of the compressor; for a high-pressure refrigerant compressor (such as a carbon dioxide compressor), the low-back pressure compressor has a suction pressure inside the shell, which has low requirements for the pressure resistance of the shell; the motor of the compressor is inside the shell, and the low-back pressure compressor has a low shell environment temperature, which has low requirements for the high-temperature resistance of the motor.

[0003] Currently, the lubrication of the moving parts of the low-back pressure compressor is mainly achieved by the following way: a lubricating oil pool is arranged at the bottom of the compressor, the bottom of the crankshaft extends into the oil pool, and when the compressor is running, the lubricating oil is pumped into the through hole in the middle of the crankshaft by the centrifugal pump, and then the lubricating oil is delivered to the sliding parts such as the upper cylinder cover, the lower cylinder cover, the piston and the blade through the radial oil holes on the crankshaft connected with the through hole.

[0004] The oil return lubrication of the low-back pressure compressor has the following problems: after the lubricating oil is delivered from the radial oil holes of the crankshaft to the sliding parts of the pump body and lubricates the sliding parts, a part of the oil is dissolved in the refrigerant and discharged through the exhaust port of the compressor, which will gradually reduce the lubricating oil in the compressor, thereby affecting the performance and reliability of the compressor.

[0005] Therefore, the present application provides an oil-gas separator and a compressor. SUMMARY

[0006] In view of the problems in the prior art, the oil-gas separator and the compressor of the present application overcome the difficulties of the prior art, can conveniently fix the capillary coil outside the oil separation lower shell, reduce the risk of capillary fracture caused by machine vibration, throttle and depressurize the high-pressure lubricating oil through the capillary structure, and deliver it back to the compressor, thereby greatly improving the performance and reliability of the compressor.

[0007] Embodiments of the present application provide an oil-gas separator, comprising:

[0008] An oil separation tank is arranged along a vertical line, and a through hole is arranged in the side wall and the bottom of the lower part of the oil separation tank;

[0009] A capillary coil surrounds the outer periphery of the lower part of the oil separator tank; the oil inlet pipe of the capillary coil enters the oil separator tank through the through-hole and extends to the bottom of the oil separator tank; and

[0010] An outer shell is fitted onto the lower part of the oil separator tank, and together with the outer wall of the lower part of the oil separator tank, it encapsulates the capillary coil. A deposition gap is provided between the bottom of the outer shell and the bottom of the oil separator tank for the deposition of separated lubricating oil. The bottom of the outer shell is provided with two through holes that connect to the return oil pipe and the air inlet pipe, respectively. The air inlet pipe is inserted into the inner cavity of the oil separator tank through the bottom through hole.

[0011] Preferably, the lower part of the oil separator is provided with an annular recess, the capillary coil is disposed in the annular recess, and the outer shell is welded to the lower part of the oil separator, forming a clamping space with the annular recess to clamp the inner and outer walls of the capillary coil.

[0012] Preferably, the outer periphery 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. The first oil inlet pipe extends parallel to the first through hole in the lower side wall of the oil separator and reaches the central area of ​​the bottom of the oil separator.

[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. The second oil inlet pipe extends downward to the central area of ​​the bottom of the oil separator after passing through a second through hole in the side wall of the lower part of the oil separator.

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

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

[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 the side of the outer housing near the oil outlet, and the second end is connected to the compressor.

[0019] Embodiments of the present invention also provide a compressor, including the oil-gas separator as described above, wherein the compressor is a low back pressure (i.e., suction pressure) rolling rotor compressor.

[0020] The oil-gas separator and compressor of the present invention can wind the capillary coil around the lower housing 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 depressurized through the capillary structure and transported back into the compressor to realize the circulation lubrication of the compressor pump body by the oil, thereby improving the performance and reliability of the compressor. Attached Figure Description

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

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

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

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

[0025] Figure Labels

[0026] 1. Oil separator tank

[0027] 11. Annular concave platform

[0028] 2. Outer shell

[0029] 3. Depositional gaps

[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 separator intake pipe

[0038] 53 First End

[0039] 54 Second End

[0040] 55 Return oil pipe Detailed Implementation

[0041] The following specific examples illustrate the implementation methods of this application. Those skilled in the art can easily understand the other advantages and effects of this application from the content disclosed herein. This application can also be implemented or applied through other different specific embodiments, and various details in this application can be modified or changed according to different viewpoints and application systems without departing from the spirit of this application. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0042] The embodiments of this application will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily implement the application. This application may be embodied in many different forms and is not limited to the embodiments described herein.

[0043] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples represented in this application, as well as features of different embodiments or examples.

[0044] Furthermore, the terms "first" and "second" are used for illustrative purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the representation of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0045] To clearly illustrate this application, devices unrelated to the description are omitted, and the same or similar constituent elements throughout the specification are given the same reference numerals.

[0046] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0047] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0048] Although the terms first, second, etc., are used in some instances herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0049] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the scope of this application. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in the specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0050] Although not explicitly defined, all terms, including technical and scientific terms used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with the relevant technical literature and the content of this present application, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0051] Figure 1 This is a schematic diagram of the first type of oil-gas separator of the present invention. Figure 2 This is a partial perspective view of the first type of 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 provided on the lower side wall and bottom 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 through 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 together with the outer wall of the lower part of the oil separator tank 1, it encapsulates the capillary coil 4. A deposition 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 separated lubricating oil. The bottom of the outer shell 2 has two through holes that connect to the return oil pipe 55 and the air inlet pipe, respectively. The air inlet pipe is inserted into the inner cavity of the oil separator tank 1 through the bottom through hole. This invention, by winding a capillary coil around the lower housing of the oil separator, facilitates fixation and reduces the risk of capillary breakage due to vibrations during machine operation. Finally, the capillary structure throttles and reduces the pressure of the high-pressure lubricating oil, allowing it to be returned to the compressor for circulating lubrication of the compressor pump, thus improving the compressor's performance and reliability.

[0052] In a preferred embodiment, the lower part of the oil separator tank 1 is provided with an annular recess 11, and the capillary coil 4 is disposed in the annular recess 11. The outer shell 2 is welded to the lower part of the oil separator tank 1, forming a clamping space with the annular recess 11 to clamp the inner and outer walls of the capillary coil 4, but this is not an example.

[0053] In a preferred embodiment, the outer periphery of the capillary coil 4 is flush with the oil separator 1, but this is not 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 parallel to the first through hole 43 on the side wall of the lower part of the oil separator 1 and reaches the central area of ​​the bottom of the oil separator 1, but this is not 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 extends downward to the central area of ​​the bottom of the oil separator 1 after passing through the second through hole 45 on the side wall of the lower part of the oil separator 1, but this is not an example.

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

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

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

[0060] Continue to refer to Figure 1 and 2 The oil-gas separator includes a capillary coil 4, an oil return pipe 55, and an oil separator tank 1. The oil inlet of the capillary coil 4 is located at the bottom of the coil and is connected to a first oil inlet pipe 41. The first oil inlet pipe 41 extends parallel to the first through-hole 43 on the lower side wall of the oil separator tank 1 and reaches the central area at the bottom of the oil separator tank 1. First, the high-pressure gas discharged after the compressor starts running enters the oil separator tank 1 through the first oil separator inlet pipe 51 and the second oil separator inlet pipe 52. At the same time, the lubricating oil mixed in the high-pressure refrigerant gas also enters the oil separator tank 1 through the inlet. In the oil-gas separator, the lubricating oil and refrigerant gas are separated. The oil settles at the bottom of the oil separator tank 1 and is forced into the capillary coil 4 by high pressure. The capillary coil 4 throttles and reduces the pressure, and the oil is sent back to the compressor through the oil return pipe 55. To maintain the reliability of the capillary coil 4 and store some oil, a shell is welded to the outside of the capillary coil 4. This also reduces the risk of capillary coil breakage caused by vibration, but this is not used as an example.

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

[0062] Embodiments of the present invention also provide a compressor, including the oil-gas separator described above, wherein the compressor is a low back pressure (i.e., suction pressure) rolling rotor compressor. 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 conveniently fix the capillary coil around the lower housing of the oil separator, and reduce the risk of capillary breakage caused by machine vibration. The high-pressure lubricating oil is throttled and depressurized through the capillary structure and transported back into the compressor to realize the circulation lubrication of the compressor pump body by the oil, thereby improving the performance and reliability of the compressor.

[0064] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An oil-gas separator, characterized in that, include: An oil separator (1) is set along a vertical line, and a through hole is provided on the lower side wall and bottom of the oil separator (1); A capillary coil (4) surrounds the lower outer periphery of the oil separator (1). The oil inlet pipe of the capillary coil (4) enters the oil separator (1) through a through hole in the side wall of the lower part of the oil separator (1) and extends to the bottom of the oil separator (1); and The outer shell (2) is fitted onto the lower part of the oil separator (1), and together with the outer wall of the lower part of the oil separator (1), encapsulates the capillary coil (4). A deposition gap (3) is provided between the bottom of the outer shell (2) and the bottom of the oil separator (1) for the deposition of separated lubricating oil. The bottom of the outer shell (2) is provided with two through holes that connect the return oil pipe (55) and the air inlet pipe respectively. The air inlet pipe is inserted into the inner cavity of the oil separator (1) through the bottom through hole. The lower part of the oil separator (1) is provided with a An annular recess (11) is provided with the capillary coil (4) inside the annular recess (11). The outer shell (2) is welded to the lower part of the oil separator (1) and forms a clamping space with the annular recess (11) to clamp the inner and outer walls of the capillary coil (4). The oil outlet (42) of the capillary coil (4) is connected to the deposition gap (3). The first end (53) of the return oil pipe (55) is connected to the side of the outer shell (2) near the oil outlet (42), and the second end (54) is connected to the compressor.

2. The oil-gas separator as described in claim 1, characterized in that, The outer periphery of the capillary coil (4) is flush with the outer periphery of the upper part of the oil separator (1).

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

4. The oil-gas separator as described in claim 1, characterized in that, The oil inlet pipe of the capillary coil (4) is the second oil inlet pipe (44), the through hole of the lower side wall of the oil separator (1) is the second through hole (45), the oil inlet of the capillary coil (4) is located at the top of the capillary coil (4), the oil inlet is connected to the second oil inlet pipe (44), and the second oil inlet pipe (44) extends downward to the central area of ​​the bottom of the oil separator (1) after passing through the second through hole (45).

5. The oil-gas separator as described in claim 1, characterized in that, The oil separator (1) has a cylindrical structure, and the capillary coil (4) is located above the deposition gap (3) based on the second projection of the deposition gap (3) based on the central axis of the oil-gas separator, based on the first projection of the first projection of the first projection of the second projection of the deposition gap (3) based on the central axis of the deposition gap (3).

6. The oil-gas separator as described in claim 1, characterized in that, The intake pipe is connected to the first oil separator intake pipe (51) and the second oil separator intake pipe (52) arranged vertically. The first oil separator intake pipe (51) and the second oil separator intake pipe (52) are respectively connected to the exhaust port of the compressor.

7. A compressor, characterized in that: Includes the oil-gas separator as described in claim 1.

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