Suction gas return oil assembly, liquid separator, and compressor including same

Abstract

The application provides a suction oil return assembly, a distributor and a compressor comprising the same. The suction oil return assembly comprises a switch, a liquid level detection member and a control member. The switch is configured to be movable between an open position for opening an oil return port and a closed position for closing the oil return port. The liquid level detection member is in signal connection with the control member to transmit a signal of a change in oil level to the control member. The control member is in electrical connection with the switch to control movement of the switch according to the signal transmitted by the liquid level detection member. When the switch is in the open position, the oil return port is in communication with the oil level. When the switch is in the closed position, the oil return port is isolated from the oil level. The distributor comprises a shell. The top of the shell is provided with an exhaust port. The bottom of the shell is provided with an air inlet port and an oil return port. The suction oil return assembly is arranged in the shell. The compressor comprises the distributor. The application is used for returning the lubricating oil separated from the refrigerant in the distributor to the compressor, so as to reduce the amount of lubricating oil in the distributor.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to an air suction and oil return component, a liquid distributor and a compressor comprising the same. Background Art

[0002] In air conditioning systems, the refrigerant compressed by the rotary compressor is typically mixed with a certain proportion of lubricating oil. The oil separator causes some of this oil to return to the oil sump, while the remainder accumulates in the liquid separator. This reduces the amount of lubricating oil in the rotary compressor, leading to insufficient lubrication between the friction pairs and reduced compressor reliability. Furthermore, as the lubricating oil accumulates in the liquid separator, when the refrigerant is drawn into the compressor through the separator for compression, the accumulated oil undergoes heat exchange, increasing the intake air temperature and reducing the energy efficiency of the compression and air conditioning system.

[0003] In the prior art, in order to discharge the lubricating oil accumulated in the separation device, Figure 1 As shown, an oil return hole 100 is often opened at the lower part of the intake pipe above the intake protrusion to return the lubricating oil in the separation device to the compressor. However, this oil return method has the technical problem of incomplete oil return, resulting in a large amount of lubricating oil accumulation in the separation device and reduced compressor reliability. Summary of the Invention

[0004] The object of the present invention is to provide an air suction and oil return assembly, a liquid distributor and a compressor comprising the same, so as to solve the technical problems existing in the prior art of large amount of lubricating oil accumulation in the liquid distributor and reduced reliability of the compressor.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The present invention provides an air intake and oil return component, including a switch component, a liquid level detection component and a control component, wherein the switch component is configured to be movable between an open position for opening the oil return port and a closed position for closing the oil return port; the liquid level detection component is signal-connected to the control component to transmit an oil level rise and fall signal to the control component; the control component is electrically connected to the switch component to control the movement of the switch component according to the signal transmitted by the liquid level detection component; when the switch component is in the open position, the oil return port is connected to the oil, and when the switch component is in the closed position, the oil return port is isolated from the oil.

[0007] As a further improvement of the present invention, the air suction and oil return assembly further includes an oil collecting member sleeved on the peripheral side of the switch member, and the oil collecting member is provided with a plurality of oil holes along the vertical direction.

[0008] As a further improvement of the present application, the number of the oil passing holes at the same height is multiple, and they are arranged along the circumferential part of the oil collecting member or in a whole circle; all the oil passing holes are arranged uniformly or non-uniformly in the vertical direction; and / or, all the oil passing holes at the same height are arranged uniformly or non-uniformly.

[0009] As a further improvement of the present application, the oil collecting member is a hollow pipe with open ends.

[0010] As a further improvement of the present application, the liquid level detecting member comprises a magnetic float and a magnetic sensitive component capable of generating magnetic induction with the magnetic float, the magnetic float is movably sleeved outside the oil collecting member and can be lifted relative to the oil collecting member, the magnetic sensitive component is arranged on the switch member, and the magnetic sensitive component is signal connected with the control member.

[0011] As a further improvement of the present application, the liquid level detecting member further comprises a limiting member arranged on the top of the oil collecting member to limit the lifting height of the magnetic float.

[0012] As a further improvement of the present application, the switch member comprises a first magnetic member, a positioning member arranged above the first magnetic member, and a second magnetic member arranged on the top of the positioning member, the magnetic sensitive component is arranged on the second magnetic member, the second magnetic member is electrically connected with the control member, the magnetic field direction of the second magnetic member can be converted to generate attractive force or repulsive force with the first magnetic member, so as to lift or lower the positioning member to open or close the flow channel between the inner cavity of the oil collecting member and the oil return port. The first magnetic member is made of permanent magnet material, and the second magnetic member is made of electromagnetic material.

[0013] As a further improvement of the present application, the buoyancy of the magnetic float in the oil is greater than its gravity.

[0014] The present application provides a liquid separator, which comprises a shell, an exhaust port is formed on the top of the shell, an air inlet and an oil return port are formed on the bottom of the shell, and an air suction and oil return assembly is arranged in the shell. An oil return pipe which communicates with the inside of the compressor is arranged on the oil return port.

[0015] As a further improvement of the present application, the oil return port is protruded to the oil direction to form an oil return protruding ring, the first magnetic member is sleeved on the circumferential side of the oil return protruding ring, and the positioning member is provided with an oil return groove corresponding to the oil return protruding ring.

[0016] As a further improvement of the present application, the oil return convex ring is provided with a first oil return channel communicated with the oil return port; the switch member is provided with a second oil return channel, the second oil return channel is communicated with the first oil return channel when the switch member is in the open position, and the second oil return channel is separated from the first oil return channel when the switch member is in the closed position.

[0017] As a further improvement of the present application, the second oil return channel is arranged on the positioning member.

[0018] The present application provides a compressor comprising the distributor.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The present application designs a suction oil return assembly at the bottom of the suction distributor, which can control the switch member in the oil return assembly to be in the open position or the closed position to open or close the flow channel between the oil and the oil return port according to the change of the oil level of the lubricating oil, so as to realize the return or avoidance of the lubricating oil according to the change of the oil level, thereby reducing the amount of lubricating oil in the suction distributor to a certain extent, improving the storage amount of lubricating oil in the compressor to ensure the reliability of the friction pair during operation, and improving the energy efficiency of the air conditioning system.

[0021] In the further improvement of the present application, the switch member is alternately switched between the attraction force and the repulsion force, so that the two are attracted together to close the flow channel and avoid oil return, or the two are repelled away to open the flow channel and return oil, and the switch between the attraction force and the repulsion force is controlled by the control member according to the rising or falling of the magnetic float, that is, the rising or falling of the oil level, so that the oil return assembly has the function of a liquid level sensor, which is not only simple to control, but also more intelligent in implementation, and has a lower cost compared with the existing liquid level sensor on the market, and has good market prospects and product promotion. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is a schematic view of the oil return structure of the distributor in the prior art;

[0024] Figure 2 is a schematic view of the structure of the distributor in the non-oil return state of the present application;

[0025] Figure 3 is Figure 2 is a partial enlarged view of A in the figure;

[0026] Figure 4 is a structure diagram of the oil return state of the oil distributor of the application;

[0027] Figure 5 is Figure 4 is a partial enlarged view of B in the figure.

[0028] In the figure, 1 is a switch part; 11 is a first magnetic part; 12 is a positioning part; 121 is an oil return groove; 122 is a second oil return channel; 13 is a second magnetic part; 2 is a liquid level detection part; 21 is a magnetic float; 22 is a magnetic sensitive assembly; 23 is a limiting part; 3 is an oil gathering part; 31 is an oil passing hole; 100 is an oil return hole; 200 is a shell; 300 is an exhaust port; 400 is an air inlet; 500 is an oil return port; 501 is an oil return convex ring; 502 is a first oil return channel; 600 is an oil surface; and 700 is a flow channel. DETAILED DESCRIPTION

[0029] In order to make the objects, technical solutions and advantages of the application clearer, the technical solutions of the application will be described in detail below. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the application.

[0030] As Figure 2 shown, the application provides an air suction oil return assembly applied to an air suction distributor, which is used for returning lubricating oil separated from refrigerant in the distributor to a compressor. Specifically, the air suction oil return assembly comprises a switch part 1, a liquid level detection part 2 and a control part. The switch part 1 is configured to be movable between an open position for opening an oil return port 500 and a closed position for closing the oil return port 500. The liquid level detection part 2 is in signal connection with the control part. The liquid level detection part 2 can follow the rise and fall of an oil surface 600 of the lubricating oil to detect the position of the oil surface 600 and transmit the rise and fall signal of the oil surface 600 to the control part. The control part is in electrical connection with the switch part 1 to control the movement of the switch part 1 according to the signal transmitted by the liquid level detection part 2. When the switch part 1 is in the open position, the oil return port 500 is in communication with the oil surface to make the lubricating oil return. When the switch part 1 is in the closed position, the oil return port 500 is isolated from the oil surface to prevent the lubricating oil from returning.

[0031] The application designs a suction oil return assembly at the bottom of the suction distributor, which can control the switch in the oil return assembly to be in the open position or the closed position according to the change of the oil level of the lubricating oil, so as to open or close the flow channel between the oil and the oil return port, thereby realizing the return or avoiding the return of the lubricating oil to the compressor according to the change of the oil level, reducing the amount of lubricating oil in the suction distributor to a certain extent, improving the storage amount of lubricating oil in the compressor to ensure the reliability of the friction pair in the compressor, and improving the energy efficiency of the air conditioning system.

[0032] As an optional embodiment, the suction oil return assembly further comprises an oil collecting member 3 sleeved around the switch 1, and the oil collecting member 3 is provided with a plurality of oil passing holes 31 in the vertical direction. The lubricating oil in the distributor can be collected into the oil collecting member 3 through the oil passing holes 31, and then the lubricating oil is returned through the switch 1 in the oil collecting member 3.

[0033] As an optional embodiment, the number of oil passing holes 31 at the same height is multiple, which are arranged along the circumferential part or the whole circle of the oil collecting member 3. In order to make all the lubricating oil enter the oil collecting member 3, it is preferred that the oil passing holes 31 at the same height are arranged along the whole circle.

[0034] On the basis of the above technical scheme, all the oil passing holes 31 are uniformly or non-uniformly arranged in the vertical direction; and / or, all the oil passing holes 31 at the same height are uniformly or non-uniformly arranged.

[0035] The oil passing holes 31 can be of the same size or different sizes, and can be of regular or irregular shapes such as circular, square, oval, etc., as long as they are suitable for the lubricating oil to pass through.

[0036] As shown in Figure 3 The oil collecting member 3 is a hollow pipe with open ends. A plurality of oil passing holes 31 are arranged in the height direction and the circumferential direction of the hollow pipe, and the switch 1 is located in the inner cavity of the hollow pipe.

[0037] As shown in Figure 4As shown, the liquid level detection member 2 comprises a magnetic float 21 and a magnetic sensitive component 22 capable of generating magnetic induction with the magnetic float 21, the magnetic float 21 is movably sleeved outside the oil collecting member 3 and can be raised and lowered relative to the oil collecting member 3, the magnetic sensitive component 22 is arranged on the switch member 1, and the magnetic sensitive component 22 is signal connected with the control member. When the magnetic float 21 is raised and lowered with the oil surface 600, the magnetic sensitive component 22 senses the height change of the magnetic float 21, generates a magnetic signal, and converts the magnetic signal into an electric signal and transmits the electric signal to the control member through an electric control line. Among them, the liquid level detection member 2 is realized by using the product in the prior art, specifically, the magnetic float 21 has a buoyancy greater than gravity in the lubricating oil, a magnet is arranged in the magnetic float 21, and the magnetic sensitive component 22 can adopt a Hall sensor. When the magnetic float 21 is raised and lowered with the liquid level, the Hall sensor can output a corresponding voltage signal through the position change of the magnetic float to transmit the position signal.

[0038] The liquid level detection member 2 further comprises a limiting member 23 arranged at the top of the oil collecting member 3 to limit the floating height of the magnetic float 21. Specifically, the oil collecting member 3 is a circular hollow conduit, the magnetic float 21 has a circular ring structure and can be raised and lowered along the oil collecting member 3, and the limiting member 23 is arranged to prevent the magnetic float 21 from coming out of the top of the oil collecting member 3.

[0039] As an optional embodiment, as shown in the figure, Figure 5 As shown, the switch member 1 comprises a first magnetic member 11, a positioning member 12 arranged above the first magnetic member 11, and a second magnetic member 13 arranged at the top of the positioning member 12, the magnetic sensitive component 22 is arranged on the second magnetic member 13, the first magnetic member 11 is made of permanent magnet material and is fixed on the bottom surface of the inner cavity of the distributor, the second magnetic member 13 is made of electromagnetic material, the second magnetic member 13 is similar to an electromagnetic relay and can generate magnetism and switch the magnetic pole when powered on; the second magnetic member 13 is electrically connected with the control member, the magnetic field direction of the second magnetic member 13 can be converted to generate an attractive force or a repulsive force with the first magnetic member 11, so as to close or open the flow passage 700 between the inner cavity of the oil collecting member 3 and the oil return port 500. When the first magnetic member 11 and the second magnetic member 13 are adsorbed together, the flow passage 700 can be closed, at this time the inside and outside of the switch member 1 are cut off, so that the lubricating oil cannot pass through the switch member 1 to enter the oil return port 500, when the first magnetic member 11 and the second magnetic member 13 are mutually repulsive, the second magnetic member 13 will drive the positioning member 12 to rise upward under the action of the repulsive force, so that the positioning member 12 and the first magnetic member 11 form the flow passage 700, and the lubricating oil can flow into the switch member 1 through the flow passage 700 and enter the oil return port 500, and then flow back to the compressor through the oil return pipe on the oil return port 500.

[0040] In order to ensure that the magnetic float 21 can rise and fall with the oil liquid surface 600, in the application, the buoyancy of the magnetic float 21 in the oil liquid is greater than its gravity. The material and the adjustment of the shape and the liquid surface contact area can be selected to achieve this.

[0041] As shown in Figure 2 and Figure 4 The application provides a liquid separator, which comprises a shell 200, an exhaust port 300 is formed at the top of the shell 200, an air suction and oil return assembly is arranged in the shell 200, and an air suction and oil return assembly is arranged at the oil return port 500.

[0042] As an optional embodiment, the oil return port 500 is protruded to the oil liquid direction to form an oil return protruding ring 501, the first magnetic part 11 is sleeved on the circumferential side of the oil return protruding ring 501, and the bottom is fixedly connected with the bottom surface of the inner cavity of the shell 200, the thickness of the first magnetic part 11 is less than the height of the oil return protruding ring 501, and the positioning part 12 is provided with an oil return groove 121 matched with the oil return protruding ring 501 at the corresponding position. Specifically, in the application, the oil return groove 121 is arranged at the bottom of the positioning part 12.

[0043] Further, the oil return protruding ring 501 is provided with a first oil return channel 502 communicated with the oil return port 500, and the positioning part 12 is provided with a second oil return channel 122, the second oil return channel 122 is communicated with the first oil return channel 502 when the switch part 1 is located at the open position, and the second oil return channel 122 is cut off from the first oil return channel 502 when the switch part 1 is located at the closed position. It should be noted that the magnetic repulsion force between the first magnetic part 11 and the second magnetic part 13 can ensure that the position of the second magnetic part 13 rising can make the second oil return channel 122 communicated with the first oil return channel 502.

[0044] The application provides a compressor comprising the above-mentioned liquid separator.

[0045] Further, the compressor is a rotary compressor.

[0046] In a further improved scheme of the application, the switch part adopts the alternate transformation between the suction force and the repulsion force, so that the two are attracted together to close the flow channel and avoid oil return, or the two are repelled away to open the flow channel and perform oil return. The transformation between the suction force and the repulsion force is controlled by the control part according to the rising or falling of the magnetic float, that is, the rising or falling of the oil liquid surface, so that the oil return assembly has the function of a liquid level sensor. The control is simple, the implementation is more intelligent, the structure is lower in cost compared with the existing liquid level sensor in the market, and has good market prospect and product promotion.

[0047] Embodiment 1:

[0048] As shown in Figure 2As shown, the control part is connected to the external electric control line of the liquid dispenser, and the control part controls the up and down movement of the second magnetic part 13. The second magnetic part 13 is fixedly connected to the positioning part 12. When the second magnetic part 13 is raised or lowered, it will drive the positioning part 12 to rise or fall together, thereby realizing the isolation of the return oil channel and the circulation channel, and realizing the oil return of the liquid dispenser. The air suction and oil return assembly at the bottom of the liquid dispenser mainly includes the second magnetic part 13 (electromagnetic relay), a hollow conduit, a limiter 23, a first magnetic part 11, a positioning part 12, a magnetic float 21 and a magnetic sensitive assembly 22; wherein the wall surface of the hollow conduit has a plurality of oil holes 31, mainly for concentrating the lubricating oil accumulated in the liquid dispenser in the oil return assembly, and the limiter 23 is located at the upper end of the hollow conduit, mainly for limiting the magnetic float 21 assembled on the outer wall of the hollow conduit, and the magnetic float 21 is sleeved on the hollow conduit. The outside of the liquid separator can rise and fall with the change of the liquid level of the lubricating oil; and in the hollow conduit, the bottom surface of the oil return pipe at the bottom of the liquid separator cooperates with the bottom, and there is a first magnetic part 11 on the bottom surface of the inner wall of the shell 200 of the liquid separator. Its second magnetic part 13 is attracted to the first magnetic part 11 when the compressor is not working, so that the positioning part 12 is fixed to the bottom of the liquid separator, and the electric control line is connected to the second magnetic part 13 through a hollow tube. The second magnetic part 13 realizes the transmission of electrical signals and realizes the up and down movement of the positioning part 12.

[0049] Working principle: When the compressor is not working, the second magnetic part 13 (electromagnetic relay) is not working. At this time, the second magnetic part 13 is attracted to the first magnetic part 11, and the second magnetic part 13 and the positioning part 12 are fixed at the bottom of the liquid separator, isolating the return oil channel and the flow channel. At this time, the liquid separator does not return oil; when the compressor is working, the liquid level of the lubricating oil accumulated inside the liquid separator and carried away from the compressor oil pool by the refrigerant circulation will change, and the magnetic float 21 will rise and fall with the liquid level. The magnetic sensitive component 22 in the hollow conduit senses the height change of the magnetic float 21, and will convert the generated magnetic signal into an electrical signal and transmit it to the control component through the electric control line. The control component will feed back the received electrical signal to the second magnetic part 13. 12 is connected to the second magnetic part 13, and the function of the second magnetic part 13 is similar to that of an electromagnetic relay. When it receives an electrical signal, it converts the electrical signal into a magnetic signal, so that its magnetism repels the magnetism of the first magnetic part 11, thereby causing the second magnetic part 13 to move upward and drive the positioning part 12 to move upward, connecting the return oil channel and the circulation channel, so that the lubricating oil in the hollow conduit can return to the oil pool of the compressor through the return oil pipe, completing the oil return; similarly, when the liquid level drops, the magnetic float 21 also drops, and the conversion of the electromagnetic signal will cause the second magnetic part 13 to drop and attract the first magnetic part 11, driving the positioning part 12 to move downward and fit tightly together with the first magnetic part 11, completing the isolation of the return oil channel and the circulation channel.

[0050] First of all, it needs to be explained here that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0051] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. Figure 1

[0052] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0053] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0055] ​In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0056] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An air suction and oil return component, characterized in that: The invention comprises a switch element, a liquid level detection element, and a control element. The switch element is configured to be movable between an open position for opening an oil return port and a closed position for closing the oil return port. The liquid level detection element is signal-connected to the control element to transmit an oil level rise and fall signal to the control element. The control element is electrically connected to the switch element to control the movement of the switch element according to the signal transmitted by the liquid level detection element. When the switch element is in the open position, the oil return port is connected to the oil, and when the switch element is in the closed position, the oil return port is isolated from the oil. The air suction and oil return assembly further includes an oil collecting member sleeved around the switch member, the oil collecting member being provided with a plurality of oil holes in a vertical direction; the liquid level detection member includes a magnetic float and a magnetic sensitive component capable of generating magnetic induction with the magnetic float, the magnetic float being movably sleeved on the outside of the oil collecting member and capable of rising and falling relative to the oil collecting member, the magnetic sensitive component being provided on the switch member and being signal-connected to the control member; The switch component includes a first magnetic component, a positioning component arranged above the first magnetic component and a second magnetic component arranged on the top of the positioning component. The magnetic sensitive component is arranged on the second magnetic component. The second magnetic component is electrically connected to the control component. The direction of the magnetic field of the second magnetic component can be converted to generate an attractive force or a repulsive force with the first magnetic component, thereby causing the positioning component to rise or fall to open or close the flow channel between the inner cavity of the oil collecting component and the oil return port.

2. The air suction and oil return assembly according to claim 1, characterized in that: There are multiple oil holes at the same height, which are arranged along a partial area or a whole circle of the circumference of the oil collecting component; all the oil holes are arranged evenly or unevenly in the vertical direction; and / or all the oil holes at the same height are arranged evenly or unevenly.

3. The air suction and oil return assembly according to claim 1, characterized in that: The oil collecting member is a hollow conduit with two open ends.

4. The air suction and oil return assembly according to claim 2 or 3, characterized in that: The liquid level detection component further includes a limiting component arranged on the top of the oil collecting component to limit the floating height of the magnetic float.

5. A liquid dispenser, characterized in that: It comprises a shell, an exhaust port is formed on the top of the shell, an air inlet and an oil return port are formed on the bottom of the shell, and the air suction and oil return assembly according to any one of claims 1 to 4 is arranged in the shell.

6. The liquid dispenser according to claim 5, characterized in that The oil return port protrudes toward the oil direction to form an oil return convex ring, and a first oil return channel connected to the oil return port is provided on the oil return convex ring. A second oil return channel is provided on the switch component. When the switch component is in the open position, the second oil return channel is connected to the first oil return channel. When the switch component is in the closed position, the second oil return channel is separated from the first oil return channel.

7. A compressor, characterized in that: Comprising the dispenser as claimed in claim 6.

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