Liquid distributor assembly, rotary compressor and air conditioner

Abstract

The application provides a distributor assembly, a rotary compressor and an air conditioner. The distributor assembly comprises a distributor, a ring-shaped distribution cavity, the distributor is sleeved on the outer periphery of the shell, a flow guide pipe is arranged in the distribution cavity, the outlet end of the flow guide pipe is communicated with the suction port, and the inlet end is higher than the outlet end. In the ring-shaped distribution cavity of the distributor, the flow guide pipe with the higher inlet end is arranged, the separation effect of gas and liquid in the distribution cavity is improved, the increase of the height of the inlet end can reduce or even prevent the liquid from entering the pump body assembly, and the liquid hammer phenomenon is avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air conditioners, and particularly relates to a distributor assembly, a rotary compressor and an air conditioner. BACKGROUND

[0002] The rotary compressor is widely applied to refrigeration systems such as air conditioners, heat pumps and refrigeration and freezing, and a conventional structure mainly comprises a motor assembly at the upper side and a pump body assembly at the lower side in a shell. The distributor is one of the indispensable components of the rotary compressor, and can play the roles of pressure stabilization, oil distribution, liquid distribution and filtration. In the conventional design of the rotary compressor, the distributor is located at one side outside the compressor, which not only increases the overall radial size of the rotary compressor, but also causes a series of problems such as up-and-down swinging of the distributor, excessive refrigerant pneumatic noise and the like, which has been a difficulty to be solved by researchers for a long time.

[0003] The related art proposes an annular structure distributor which is wrapped around the outer circumferential surface of the compressor shell to form an annular distributor cavity, and can solve the structural defects existing at one side outside the compressor; however, the annular structure distributor can cause liquid-state refrigerant and lubricating oil to enter the inside of the pump body assembly, and damage the components of the pump body assembly. SUMMARY

[0004] Therefore, the application provides a distributor assembly, a rotary compressor and an air conditioner, which can solve the problem that liquid-state refrigerant and lubricating oil in the annular distributor of the prior art enter the inside of the pump body assembly and damage the pump body assembly.

[0005] In order to solve the above problems, the application provides a distributor assembly which separates the gas and liquid of the refrigerant entering the compressor, and the lower part of the shell of the compressor is provided with a suction port; the distributor assembly comprises:

[0006] A distributor comprises an annular distributor cavity; the distributor is wrapped around the outer circumferential surface of the shell;

[0007] A flow guide pipe is arranged in the distributor cavity; the outlet end of the flow guide pipe is in communication with the suction port, and the inlet end is higher than the outlet end.

[0008] In some embodiments,

[0009] A filter is arranged on the inlet end to filter and remove impurities of the fluid entering the flow guide pipe.

[0010] In some embodiments,

[0011] The flow guide pipe is composed of a first pipe segment and a second pipe segment in communication, and the first pipe segment and the second pipe segment are arranged at an angle; the first pipe segment is arranged in the axial direction of the distributor cavity, and the second pipe segment is in communication with the suction port.

[0012] In some embodiments,

[0013] The lower part of the first pipe section is provided with an oil return hole on the passage wall of the suction port, which guides the separated liquid drops in the flow guide pipe to the separation chamber.

[0014] In some embodiments,

[0015] The inner wall of the separation chamber is integrally arranged with the compressor shell, and the bottom wall of the separation chamber is lower than the suction port.

[0016] In some embodiments,

[0017] The flow guide pipe is provided as a third pipe section, which is an open end and a sealed end structure, the third pipe section is arranged in axial extension and is attached to the outer wall of the compressor shell; the inlet end is the open end of the third pipe section, and the outlet end is arranged on the side wall of the third pipe section close to the sealed end.

[0018] In some embodiments,

[0019] The sealed end is lower than the lower side wall of the suction port, and the lower part of the third pipe section is provided with an oil return hole for guiding the separated liquid drops in the third pipe section to the separation chamber.

[0020] In some embodiments,

[0021] The third pipe section is surrounded by the compressor shell and a cover plate, and the cover plate is projected in axial direction as an arc or a U shape.

[0022] According to another aspect of the present application, a rotor compressor is provided, comprising the separator assembly as described above.

[0023] In some embodiments,

[0024] The separation chamber satisfies at least one of a, b and c:

[0025] a. The inlet of the separation chamber is arranged at 90°-180° with the suction port on the axial projection plane of the compressor shell;

[0026] b. The ratio of the outer diameter of the separation chamber to the outer diameter of the compressor shell is 1.2-1.5;

[0027] c. The ratio of the axial height of the separation chamber to the axial height of the compressor shell is 0.5-1.

[0028] According to another aspect of the present application, an air conditioner is provided, comprising the separator assembly as described above, or the rotor compressor as described above.

[0029] The application provides a liquid separator assembly for separating gas and liquid of refrigerant entering a compressor, a suction port being arranged at a lower part of a shell of the compressor; the liquid separator assembly comprises: a liquid separator comprising a ring-shaped liquid separation cavity; the liquid separator is sleeved with an outer periphery of the shell; a flow guide pipe is arranged in the liquid separation cavity; an outlet end of the flow guide pipe is communicated with the suction port, and an inlet end of the flow guide pipe is higher than the outlet end.

[0030] The application has the following beneficial effects:

[0031] The application sets the flow guide pipe with the higher inlet end in the ring-shaped liquid separation cavity of the liquid separator, improves the separation effect of gas and liquid in the liquid separation cavity, and the heightening of the inlet end can reduce or even prevent liquid from entering the pump body assembly, so that the liquid hammer phenomenon is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. The drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0033] Figure 1 It is a structural schematic view of the liquid separator assembly of the embodiment of the application;

[0034] Figure 2 It is another structural schematic view of the liquid separator assembly of the embodiment of the application;

[0035] Figure 3 It is a structural schematic view of the cover plate in the embodiment of the application; Figure 2

[0036] Figure 4 It is a third structural schematic view of the liquid separator assembly of the embodiment of the application;

[0037] Figure 5 It is a structural schematic view of the cover plate in the embodiment of the application. Figure 4

[0038] The signs are represented as:

[0039] 01, upper cover assembly; 02, shell; 03, liquid separator; 04, motor assembly; 05, pump body assembly; 06, lower cover assembly;

[0040] 11, liquid separation cavity; 12, elbow pipe; 13, filter; 14, oil return hole; 15, air inlet;

[0041] 16, cover plate; 161, open end; 162, closed end;

[0042] ​​21 air inlet; 22 U-shaped plate. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and does not limit the present application or its application or uses in any way. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work under the premise of the present application fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0045] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0046] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the present application.

[0047] Reference should be made in conjunction with Figures 1 to 5As shown, according to the embodiments of the present application, a liquid separator assembly is used for gas-liquid separation of refrigerant entering a compressor, and the lower part of the shell of the compressor is provided with a suction port 21; the liquid separator assembly comprises:

[0048] The liquid separator 03 comprises a ring-shaped separation cavity 11; the liquid separator 03 is sleeved on the outer periphery of the shell 02;

[0049] A flow guide pipe is arranged in the separation cavity 11; the outlet end of the flow guide pipe is communicated with the suction port 21, and the inlet end is higher than the outlet end.

[0050] According to the embodiments of the present application, the flow guide pipe with a higher inlet end is arranged in the ring-shaped separation cavity 11 of the liquid separator 03, so that the gas-liquid separation effect in the separation cavity 11 is improved, and the increase of the height of the inlet end can reduce the liquid entering the pump body assembly 05 and avoid the occurrence of liquid impact phenomenon.

[0051] In the ring-shaped separation cavity 11, the flow guide pipe is arranged, and for the structure that the suction port 21 of the pump body assembly 05 is located at the lower part, the gas-liquid mixed fluid can be well separated in the separation cavity 11, and most of the gas-liquid can be separated outside the flow guide pipe, wherein the separated gas needs to rise to the high inlet end to enter the flow guide pipe, and the liquid remains outside the flow guide pipe; even if there are still a small amount of liquid droplets in the gas that have not been separated, further collision and separation can occur in the flow guide pipe, so that the gas entering the suction port 21 of the pump body assembly 05 does not contain liquid droplets, thereby avoiding the occurrence of liquid impact phenomenon.

[0052] In order to prevent the liquid from entering the flow guide pipe as much as possible, the inlet end of the flow guide pipe is arranged as close as possible to the top wall of the liquid separator 03, and the gap therebetween is about 10-30 mm.

[0053] In some embodiments,

[0054] The filter 13 is arranged on the inlet end of the flow guide pipe, and the fluid entering the flow guide pipe is filtered and impurities are removed.

[0055] For the gas-liquid mixed fluid in the separation cavity 11, impurities such as metal slag may also be contained, in order to avoid entering the pump body assembly 05, the filter 13 is arranged on the inlet end of the flow guide pipe to prevent the impurities from entering the pump body assembly 05 and damaging the pump body assembly 05, including the pump body being stuck by the impurities and unable to rotate, etc.

[0056] In some embodiments,

[0057] The flow guide pipe is composed of a first pipe segment and a second pipe segment in communication, the first pipe segment and the second pipe segment are arranged at an angle; the first pipe segment is arranged in the axial direction of the separation cavity 11, and the second pipe segment is communicated with the suction port 21.

[0058] The flow guide pipe can adopt a bend pipe 12 formed by a first pipe segment and a second pipe segment which are arranged at an angle, i.e., the first pipe segment and the second pipe segment are arranged in a cross shape, the other end of the second pipe segment is communicated with the suction port 21, and the first pipe segment is arranged along the axial direction of the liquid separation chamber 11, so that the other end of the first pipe segment is the inlet end and is higher than the suction port 21; and a filtering member 13 for removing impurities is arranged on the other end of the first pipe segment.

[0059] After the fluid in the liquid separation chamber 11 is separated, the gas can only enter the flow guide pipe from the inlet end at the high position, so that the liquid entering the flow guide pipe is reduced.

[0060] In some embodiments,

[0061] The lower part of the first pipe segment is provided with an oil return hole 14 on the passage wall to the suction port 21, so as to guide the separated liquid drops in the flow guide pipe to the liquid separation chamber 11.

[0062] For the gas entering the flow guide pipe, there is also a possibility of containing liquid drops. After entering the flow guide pipe, the liquid drops will gather on the inner wall of the flow guide pipe through collision in the pipe, and finally flow back to the liquid separation chamber 11 through the oil return hole 14 provided on the passage wall from the lower part of the first pipe segment to the suction port 21, so as to reduce the liquid impact phenomenon in the pump body assembly 05.

[0063] In some embodiments,

[0064] The inner wall of the liquid separation chamber 11 is integrally arranged with the compressor shell 02, and the bottom wall of the liquid separation chamber 11 is lower than the suction port 21.

[0065] In order to save resources and manufacturing procedures, the inner wall of the liquid separation chamber 11 is integrally arranged with the compressor shell 02, i.e., the outer wall of the compressor shell 02 serves as the inner wall of the liquid separation chamber 11, so as to reduce the weight of the shell and the entire device; and the bottom wall of the liquid separation chamber 11 is lower than the suction port 21, so as to ensure that the bottom of the liquid separation chamber 11 stores the separated liquid drops.

[0066] In this embodiment, the rest of the liquid separator 03 can be arranged as a U-shaped ring groove structure, the U-shaped opening part is arranged inside and is sleeved on the compressor shell 02, and the compressor shell 02 is sealed and fixedly connected to block the U-shaped opening, so as to form the liquid separation chamber 11.

[0067] The bottom plate of the shell of the liquid separator 03 is lower than the suction port 21 of the pump body assembly 05, the compressor is first installed during the welding process, then the flow guide pipe is welded, and finally the shell of the annular liquid separator 03 is sleeved on the outer wall of the compressor and is annularly welded.

[0068] In some embodiments,

[0069] The flow guide pipe is a third pipe section with one open end and the other closed end. The third pipe section extends along the axial direction and is attached to the outer wall of the compressor housing 02. The inlet end is the open end 161 of the third pipe section, and the outlet end is arranged on the side wall of the third pipe section near the closed end 162.

[0070] The flow guide pipe can also be a single pipe section structure, specifically a blind pipe third pipe section, with the outlet end arranged on the side wall near the closed end 162 to communicate with the air inlet 21. This shortens the radial length of the flow guide pipe in the distribution chamber 11, which can reduce the radial length of the distribution chamber 11, thereby reducing the radial length and volume of the entire device.

[0071] In some embodiments,

[0072] The closed end 162 is lower than the lower side wall of the air inlet 21, and the lower part of the third pipe section is provided with an oil return hole 14 for guiding the separated liquid droplets in the third pipe section to the distribution chamber 11.

[0073] For the blind pipe structure as the flow guide pipe, the closed end 162 is lower than the air inlet 21, which can store part of the liquid droplets, and the oil return hole 14 is arranged on the wall near the closed end 162 to timely guide the collected liquid droplets to the distribution chamber 11, avoiding excessive liquid droplets from being brought into the pump body assembly 05.

[0074] In some embodiments,

[0075] The third pipe section is surrounded by the compressor housing 02 and the cover plate 16, and the cover plate 16 is projected in the axial direction to form an arc shape or a U shape.

[0076] The third pipe section can be surrounded by the compressor housing 02 and the cover plate 16, and the cover plate 16 forms a half-enclosed cavity structure tightly attached to the outer wall of the compressor housing 02. The half-enclosed cavity has an open end 161 facing upward and a closed end 162 facing downward, which is lower than the air inlet 21 of the pump body assembly 05. A filter 13 can be welded on the top open end 161 of the half-enclosed cavity for filtering. An oil return hole 14 is processed on the bottom of the half-enclosed cavity for oil return. The assembly process is as follows: first, the compressor is assembled and the upper and lower covers are welded; second, the half-enclosed cavity is welded on the outer wall of the compressor; third, the annular distributor 03 shell is sleeved on the compressor and is connected by ring welding.

[0077] For the cover plate 16 structure of the third pipe section, an arc shape or a U shape can be adopted, which is clamped on the air inlet 21, and the open end of the cover plate 16 is welded on the outer wall of the compressor housing 02.

[0078] The U-shaped cover plate 16 can also be provided with two spaced partitions, one end of each partition is fixed to the inner wall of the distributor 03 shell, and the other end is fixed to the compressor shell 02.

[0079] For the above-mentioned oil return mode using the oil return hole 14, a capillary tube and a siphon oil return mode can also be used.

[0080] For the above-mentioned first pipe section, second pipe section and third pipe section, they can be provided as straight pipes or bent pipes, which can achieve the flow guiding effect and prevent liquid droplets from entering the pump body assembly.

[0081] According to another aspect of the present application, a rotor compressor is provided, comprising the distributor assembly as described above.

[0082] In some embodiments,

[0083] The distribution cavity 11 satisfies at least one of a, b and c:

[0084] a. The air inlet 15 of the distribution cavity 11 and the suction port 21 are arranged at 90°-180° on the axial projection plane of the compressor shell 02;

[0085] b. The ratio of the outer diameter of the distribution cavity 11 to the outer diameter of the compressor shell 02 is 1.2-1.5;

[0086] c. The ratio of the axial height of the distribution cavity 11 to the axial height of the compressor shell 02 is 0.5-1.

[0087] The three-dimensional distance between the air inlet 15 of the distribution cavity 11 and the suction port 21 of the pump body assembly 05 is the most important factor in determining the degree of separation of the gas-liquid mixed phase entering the distribution cavity 11. The axial projection plane of the compressor shell 02 is circular, and the line connecting the centers of the air inlet 15 and the suction port 21 forms a central angle of 90°-180°, which makes the three-dimensional distance between the air inlet 15 and the suction port 21 larger, ensuring complete gas-liquid separation and improving the reliability of the operation of the rotor compressor.

[0088] Therefore, the air inlet 15 is preferably arranged on the opposite side of the suction port 21 and extends in the axial direction of the distributor, reducing the radial space occupation, and the distance between the air inlet 15 and the suction port 21 is maximized.

[0089] The outer diameter of the shell of the annular distributor 03 is 1.2-1.5 times the outer diameter of the compressor shell 02: This is to realize the pressure stabilization function of the annular distributor 03. The so-called pressure stabilization is that the volume should be about 40 times the cylinder volume of the compressor. After conversion, the outer diameter of the distributor 03 shell should be 1.2-1.5 times the outer diameter of the shell assembly.

[0090] The axial height of the housing of the ring-shaped distributor 03 is 0.5-1 times the axial height of the compressor shell 02: this is also a value set to achieve the pressure stabilizing function of the distributor 03.

[0091] The remaining parameter limits are further described for the rotor compressor of the present application.

[0092] The wall thickness of the housing of the ring-shaped distributor 03 is 1-5 mm: because the entire distributor 03 structure needs to be welded to the compressor shell 02, and the safety wall thickness that needs to be met for welding is 2-5 mm, 1 mm is set as the lower limit because the distributor 03 housing can also be integrally formed, in which case welding is not needed, and the wall thickness is 1 mm.

[0093] The diameter of the oil return hole 14 is 1-3 mm: if the oil return hole 14 is too large, liquid will be injected into the pump body in large quantities, causing liquid hammering and damaging the pump body components. Therefore, 1-3 mm is the most appropriate, so that the oil return speed is not too fast and the oil return is stable.

[0094] The flow guide pipe is arranged axially along the compressor shell 02, and the distance from the inlet end to the top end of the housing of the distributor 03 is 10-30 mm: the top end of the flow guide pipe should be as close as possible to the upper plate of the distributor 03 to prevent liquid from directly entering the flow guide pipe to the greatest extent. However, there should be a distance of 10-30 mm to facilitate the flow of gas in the separation cavity 11 to the suction port 21 of the pump body.

[0095] The inner diameter of the gas inlet 15 and the suction port 21 of the separation cavity 11 is φ12-φ16 mm: if the inner diameter is too large, the overall size of the compressor will increase, and the flow loss will also increase; if the inner diameter is too small, the flow speed will be too fast, and the flow loss will also increase, so 12-16 mm is the most appropriate.

[0096] The outer diameter of the separation cavity 11 should be 5-10 mm larger than the outer diameter of the pump body assembly 05: in order to facilitate heat insulation and noise reduction.

[0097] The outer diameter of the housing of the ring-shaped distributor 03 should be more than 18 mm larger than the outer diameter of the housing assembly: this is a safety size calculated according to the size of a conventional compressor.

[0098] The rotor compressor of the present application can significantly reduce the electromagnetic noise of the motor and the deflection noise of the distributor 03, and the noise and vibration of the entire compressor can be reduced to less than 50% of that of a conventional compressor. At the same time, the radial size of the entire machine is reduced by more than 30%.

[0099] According to another aspect of the present application, there is provided an air conditioner comprising the distributor assembly as described above, or the rotor compressor as described above.

[0100] Those skilled in the art can easily understand that the above-mentioned various embodiments can be freely combined and superimposed without conflict.

[0101] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid separator assembly for separating gas and liquid refrigerant entering a compressor, the compressor having a lower portion of a housing (02) with a suction port (21) therein; characterized by, The distributor assembly comprises: a distributor (03) comprising a ring-shaped distribution cavity (11); the distributor (03) is sleeved on the outer periphery of the shell (02); a flow guide pipe arranged in the distribution cavity (11); the outlet end of the flow guide pipe is in communication with the suction port (21), and the inlet end is higher than the outlet end; the flow guide pipe is arranged as a third pipe section, the third pipe section is of an open end and a sealed end structure, the third pipe section is arranged in an axial direction and is attached to the outer wall of the compressor shell (02); the inlet end is the open end (161) of the third pipe section, and the outlet end is arranged on the side wall of the third pipe section close to the sealed end (162); the sealed end (162) is lower than the lower side wall of the suction port (21); two partition plates are arranged at intervals, one end of each partition plate is fixed to the inner wall of the shell of the distributor (03), and the other end is fixed to the shell (02) of the compressor, so as to form the third pipe section.

2. The distributor assembly according to claim 1, wherein: a filter (13) is arranged on the inlet end to filter and remove impurities from the fluid entering the flow guide pipe.

3. The distributor assembly according to claim 1, wherein: the inner wall of the distribution cavity (11) is arranged integrally with the compressor shell (02), and the bottom wall of the distribution cavity (11) is lower than the suction port (21).

4. The distributor assembly according to claim 1, wherein: an oil return hole (14) is arranged at the lower part of the third pipe section to guide the separated liquid droplets in the third pipe section to the distribution cavity (11).

5. A rotary compressor characterized by The rotor compressor comprises the distributor assembly according to any one of claims 1-4.

6. The rotor compressor according to claim 5, wherein: the distribution cavity (11) satisfies at least one of a, b and c: a. the air inlet (15) of the distribution cavity (11) and the suction port (21) are arranged at 90°-180° on the axial projection plane of the compressor shell (02); b. the ratio of the outer diameter of the distribution cavity (11) to the outer diameter of the compressor shell (02) is 1.2-1.5; c. the ratio of the axial height of the distribution cavity (11) to the axial height of the compressor shell (02) is 0.5-1.

7. An air conditioner characterized by comprising: The rotor compressor comprises the distributor assembly according to any one of claims 1-4, or the rotor compressor according to any one of claims 5-6.

Images