Shell and screw compressor

Abstract

The utility model provides a machine shell and a screw compressor, and relates to the technical field of fluid compression equipment. The machine shell comprises a body, a first exhaust flow channel and a second exhaust flow channel are arranged in the body, a flow channel inlet is formed in one end of the first exhaust flow channel, the other end of the first exhaust flow channel is communicated with the second exhaust flow channel, and a flow channel outlet is formed in the end, away from the first exhaust flow channel, of the second exhaust flow channel. An included angle is formed between the plane where the first exhaust flow channel is located and the axial direction of the second exhaust flow channel. According to the compressor, the silencer and the medium flow channel are integrated on the machine shell, through the integrated design, the assembly procedures and cost are reduced, the cost of external connection parts such as the silencer is also reduced, and the noise of the compressor is reduced. Meanwhile, as the medium is primarily filtered before leaving the compressor, the load of an oil filter screen at the rear end is reduced, and the oil separation effect and the production efficiency are improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of fluid compression equipment, and in particular to a casing and a screw compressor. Background Art

[0002] The existing compressor includes a female rotor and a male rotor, which are used to compress the medium, and the compressed medium is discharged through the discharge port of the exhaust bearing seat. The existing technology has the following defects:

[0003] 1. When the compressed medium is discharged directly through the discharge port, it is only used to separate the lubricating oil by impacting the discharge port, which makes the oil filter load heavy and the amount of oil thrown is large, affecting the production cost.

[0004] 2. Use additional mufflers to improve noise. This requires additional production or purchase of mufflers, and requires a lot of installation time, which increases time costs and the original cost of parts. Utility Model Content

[0005] The casing and screw compressor provided by the utility model improve the oil-gas separation and noise reduction effects.

[0006] According to a first aspect of the present invention, there is provided a housing, comprising:

[0007] A body, wherein a first exhaust flow channel and a second exhaust flow channel are disposed in the body, one end of the first exhaust flow channel is provided with a flow channel inlet, and the other end is connected to the second exhaust flow channel, and one end of the second exhaust flow channel away from the first exhaust flow channel is provided with a flow channel outlet;

[0008] Wherein, the plane where the first exhaust flow channel is located and the axial direction of the second exhaust flow channel are arranged at an angle.

[0009] In some embodiments, at least a portion of the first exhaust flow channel is an arc-shaped structure, and the arc of the first exhaust flow channel is 90° to 180°.

[0010] In some embodiments, the flow channel outlet is located above the flow channel inlet along the height direction of the body;

[0011] Wherein, the height direction of the main body and the axial direction of the flow channel outlet are perpendicular to each other.

[0012] In some embodiments, the first exhaust flow channel includes a receiving portion, an expansion portion and a contraction portion, the receiving portion is connected to the flow channel inlet, one end of the expansion portion is connected to the receiving portion, and the other end is connected to the contraction portion, and the end of the contraction portion away from the expansion portion is connected to the second exhaust flow channel;

[0013] Wherein, the cross-sectional area of ​​the expansion portion is larger than the cross-sectional area of ​​the contraction portion.

[0014] In some embodiments, a cross-sectional area of ​​the expansion portion is larger than a cross-sectional area of ​​the receiving portion.

[0015] In some embodiments, along the axial direction of the flow channel outlet, the depth of the expansion portion is greater than the depth of the receiving portion, and the depth of the expansion portion is greater than the depth of the contraction portion;

[0016] and / or, along the width direction of the first exhaust flow channel, the width of the expansion portion is greater than the width of the receiving portion, and the width of the expansion portion is greater than the width of the contraction portion;

[0017] The width direction of the first exhaust flow channel is perpendicular to the flow direction of the medium in the first exhaust flow channel, and is perpendicular to the axial direction of the flow channel outlet.

[0018] In some embodiments, the housing further comprises:

[0019] A blocking structure is disposed inside at least one of the first exhaust flow channel and the second exhaust flow channel, and is used for oil and gas separation of the medium.

[0020] In some embodiments, the blocking structure comprises:

[0021] A first baffle is disposed at least one of the first exhaust flow channel and the second exhaust flow channel close to each other, and the first baffle is used to block the oil after oil and gas separation in the first exhaust flow channel.

[0022] In some embodiments, along the width direction of the first exhaust flow channel, the first baffle is connected to the inner wall of the outer side of the first exhaust flow channel;

[0023] And / or, along the axial direction of the flow channel outlet, the first baffle is connected to the bottom wall of the first exhaust flow channel on a side close to the second exhaust flow channel.

[0024] In some embodiments, along the axial direction at the location of the flow channel outlet, the depth of the first baffle is smaller than the depth of the first exhaust flow channel at a location corresponding to the first baffle.

[0025] In some embodiments, the ratio of the depth of the first baffle plate to the depth of the first exhaust channel at a position corresponding to the first baffle plate is 0.25-0.5.

[0026] In some embodiments, the blocking structure further includes a second baffle, which is disposed in the second exhaust flow channel, and the second baffle separates the cavity of the second exhaust flow channel into an oil drain cavity and an exhaust cavity;

[0027] The flow channel outlet includes a flow channel oil discharge outlet and a flow channel exhaust outlet. The oil discharge outlet is communicated with the oil discharge cavity, and the flow channel exhaust outlet is communicated with the exhaust cavity.

[0028] In some embodiments, the second baffle is extended along the axial direction of the flow channel outlet, and the second baffle is connected to the first baffle and is arranged at an angle.

[0029] In some embodiments, along the height direction of the body, the ratio of the height of the second baffle plate to the height of the second exhaust flow channel is 1 / 2 to 2 / 3;

[0030] Wherein, the height direction of the main body and the axial direction of the flow channel outlet are perpendicular to each other.

[0031] In some embodiments, the second baffle is at least partially a flat plate structure;

[0032] And / or, the second baffle is at least partially provided with a through hole, and the through hole is at least one of a circular hole, an oblong hole, an elliptical hole and a polygonal hole.

[0033] In some embodiments, the first baffle is at least partially a flat plate structure;

[0034] And / or, the first baffle is at least partially provided with a through hole, and the through hole is at least one of a circular hole, an oblong hole, an elliptical hole and a polygonal hole;

[0035] And / or, the through hole is arranged on a side of the first baffle plate close to the outer inner wall of the first exhaust flow channel.

[0036] In some embodiments, the blocking structure comprises:

[0037] a third baffle plate, arranged at one end of the first exhaust flow channel close to the flow channel inlet, with a gap being arranged between the third baffle plate and the inner and outer walls of the first exhaust flow channel;

[0038] An oil discharge structure is arranged in the first exhaust flow channel, and the oil discharge structure is arranged corresponding to the third baffle. The oil discharge structure is used to discharge oil in the medium, and the second exhaust flow channel is used to discharge gas in the medium.

[0039] In some embodiments, the oil drainage structure includes an oil drainage hole disposed in the first exhaust flow channel, and the oil drainage hole is communicated with the first exhaust flow channel.

[0040] In some embodiments, the oil drain structure includes an oil drain pipe, which is penetrated through the body and communicated with the first exhaust flow channel.

[0041] In some embodiments, the oil drain pipe and the third baffle are an integrally formed structure.

[0042] In some embodiments, the third baffle is at least one of a flat plate and a curved plate.

[0043] According to the second aspect of the utility model, an embodiment of the utility model further provides a screw compressor, comprising the above-mentioned casing.

[0044] In some embodiments, a bearing is further included, the housing is provided with a mounting hole, the bearing is arranged in the mounting hole, the axial direction of the mounting hole is the same as the axial direction of the flow channel outlet, and the first exhaust flow channel is arranged outside the mounting hole.

[0045] An embodiment of the utility model has the following advantages or beneficial effects:

[0046] The casing and screw compressor provided by the utility model utilize the first exhaust flow channel and the second exhaust flow channel to increase the flow field path of the medium and improve the oil-liquid separation efficiency of the medium. At the same time, the medium continuously changes direction during the flow along the inner walls of the first exhaust flow channel and the second exhaust flow channel, so that the wavelength of the noise part is reduced, the pulsation of the medium can be reduced, and the noise of the compressor can be reduced. Since the first exhaust flow channel and the second exhaust flow channel are arranged at an angle, the medium actually changes its flow direction at the middle connection position between the first exhaust flow channel and the second exhaust flow channel, and the noise wave at the connection position is destroyed, thereby improving the noise reduction effect and the oil separation effect. At the same time, since the medium is initially filtered before leaving the compressor, the load of the rear end oil filter is reduced, and the oil separation effect and production efficiency are improved.

[0047] In this way, the muffler and the medium flow channel are integrated into the casing. The one-piece design reduces the assembly process and cost, reduces the cost of external parts such as the muffler, and reduces the compressor noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to better understand the utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the utility model. In addition, related elements or components may have different settings as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each of the drawings. By describing its example embodiments in detail with reference to the drawings, the above and other features and advantages of the utility model will become more apparent.

[0049] in:

[0050] Figure 1 The structure of the housing of an embodiment of the utility model is shown in FIG. Figure 1 ;

[0051] Figure 2 The structure of the housing of an embodiment of the utility model is shown in FIG. Figure 2 ;

[0052] Figure 3 The structure of the housing of an embodiment of the utility model is shown in FIG. Figure 2 ;

[0053] Figure 4 The structure of the housing of the second embodiment of the utility model is shown in FIG. Figure 1 ;

[0054] Figure 5 The structure of the housing of the second embodiment of the utility model is shown in FIG. Figure 2 ;

[0055] Figure 6 The structure of the housing of the second embodiment of the utility model is shown in FIG. Figure 3 ;

[0056] Figure 7 The structure of the housing of the second embodiment of the utility model is shown in FIG. Figure 4 ;

[0057] Figure 8 The structure of the housing of the second embodiment of the utility model is shown in FIG. Figure 5 ;

[0058] Fig. 9 The structure of the first baffle in the housing of the second embodiment of the utility model is shown. Figure 1 ;

[0059] Fig.10 The structure of the first baffle in the housing of the second embodiment of the utility model is shown. Figure 2 ;

[0060] Fig.11The structure of the first baffle in the housing of the second embodiment of the utility model is shown. Figure 3 ;

[0061] Fig.12 The structure of the first baffle in the housing of the second embodiment of the utility model is shown. Figure 4 ;

[0062] Fig.13 The structure of the casing of the third embodiment of the utility model is shown in FIG. Figure 1 ;

[0063] Fig.14 The structure of the casing of the third embodiment of the utility model is shown in FIG. Figure 2 ;

[0064] Fig.15 It shows the schematic diagram of the matching structure of the casing and the oil drum of the third embodiment of the utility model;

[0065] Fig.16 The structure of another form of the casing of the third embodiment of the utility model is shown Figure 1 ;

[0066] Fig.17 The structure of another form of the casing of the third embodiment of the utility model is shown Figure 2 ;

[0067] Fig.18 The structure of another form of the casing of the third embodiment of the utility model is shown Figure 3 ;

[0068] Fig.19 The structure of another form of the casing of the third embodiment of the utility model is shown Figure 4 .

[0069] The reference numerals are described as follows:

[0070] 100, body; 101, mounting hole; 200, oil drum;

[0071] 1. First exhaust flow channel; 10. Flow channel inlet; 2. Second exhaust flow channel; 20. Flow channel outlet; 3. Blocking structure;

[0072] 11. receiving part; 12. expansion part; 13. contraction part; 1101. outer inner wall; 1102. inner outer wall; 1103. bottom wall;

[0073] 21. Oil drain chamber; 22. Exhaust chamber;

[0074] 31. first baffle; 32. second baffle; 33. third baffle; 30. through hole;

[0075] 41. Oil drain hole; 42. Oil drain pipe. DETAILED DESCRIPTION

[0076] The following will be combined with the drawings in the example embodiments of the utility model to clearly and completely describe the technical solutions in the example embodiments of the utility model. The example embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the utility model. Therefore, it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of protection of the utility model.

[0077] In the description of the present invention, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0078] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0079] Further, in the description of the present invention, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present invention are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present invention. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", or "inner", "outer", but can also be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0080] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0081] Embodiment 1

[0082] This embodiment provides a casing suitable for the compressor field, especially for screw compressors. Figure 1-Figure 2 As shown, the casing includes a main body 100, in which a first exhaust channel 1 and a second exhaust channel 2 are arranged. A channel inlet 10 is arranged at one end of the first exhaust channel 1, and the other end is connected to the second exhaust channel 2. A channel outlet 20 is arranged at one end of the second exhaust channel 2 away from the first exhaust channel 1.

[0083] The first exhaust flow channel 1 may have a variety of specific structural forms, such as an arc ring, a semicircular ring, a circular ring, an elliptical ring, an oblong hole ring, a rectangular ring or other shaped ring structures; the second exhaust flow channel 2 may have a variety of specific structural forms, such as a straight line or other regular or irregular structures.

[0084] The compressed medium enters the flow channel inlet 10 of the body 100 through the air outlet of the compression chamber, flows along the inner wall of the first exhaust flow channel 1, enters the second exhaust flow channel 2, and is then discharged to the outside of the compressor through the flow channel outlet 20. The medium may be a high-pressure mixed oil and gas, or a mixed gas of high-pressure oil and refrigerant or air, or other oil-liquid mixed gas.

[0085] The first exhaust flow channel 1 and the second exhaust flow channel 2 can increase the flow field path of the medium and improve the oil-liquid separation efficiency of the medium. At the same time, the medium continuously changes direction during the flow along the inner wall of the first exhaust flow channel 1 and the second exhaust flow channel 2, which reduces the wavelength of the noise part, reduces the pulsation of the medium, and reduces the noise of the compressor.

[0086] In this way, the present disclosure integrates the muffler and the medium flow channel into the casing. The integrated design reduces the assembly process and cost, reduces the cost of external parts such as the muffler, and reduces the noise of the compressor. At the same time, because the medium is initially filtered before leaving the compressor, the load of the rear-end oil filter is reduced, and the oil separation effect and production efficiency are improved.

[0087] It should be particularly noted that the axial direction at the flow channel outlet 20 is defined as the first direction, the first direction may also refer to the thickness direction of the main body 100, the first direction may be marked as D1, the radial direction at the flow channel outlet 20 is the second direction, the second direction may be marked as D2, the height direction of the main body 100 is the third direction, the third direction may be marked as D3, the first direction, the second direction and the third direction are perpendicular to each other, the first direction, the second direction and the third direction only represent the spatial direction and have no practical meaning.

[0088] The plane where the first exhaust flow channel 1 is located and the axial direction of the second exhaust flow channel 2 are arranged at an angle. The plane where the first exhaust flow channel 1 is located is the plane where the second direction and the third direction are located, and the axial direction of the second exhaust flow channel 2 is the first direction. For example, the angle between the plane where the first exhaust flow channel 1 is located and the axial direction of the second exhaust flow channel 2 can be an acute angle, a right angle or an obtuse angle. When the angle is a right angle, the plane where the first exhaust flow channel 1 is located and the axial direction of the second exhaust flow channel 2 are arranged perpendicular to each other.

[0089] The medium flowing out of the first exhaust flow channel 1 enters the second exhaust flow channel 2 along the tangent direction of the first exhaust flow channel 1 near one end of the second exhaust flow channel 2, wherein the tangent of the first exhaust flow channel 1 near one end of the second exhaust flow channel 2 and the arc where the first exhaust flow channel 1 is located have only one connection intersection, and the line between the connection intersection and the center of the arc where the first exhaust flow channel 1 is located is perpendicular to the tangent. Then the medium turns back and flows along the inner wall of the second exhaust flow channel 2, and the outflow direction of the medium flowing out of the flow channel outlet 20 is the same as the extension direction of the second exhaust flow channel 2. Since the first exhaust flow channel 1 and the second exhaust flow channel 2 are arranged at an angle, the medium actually changes its flow direction when passing through the middle connection position of the first exhaust flow channel 1 and the second exhaust flow channel 2, and the medium will collide with the connection position, further reducing the pulsation of the medium, improving the silencing and noise reduction effect, and to a certain extent, enhancing the oil separation effect.

[0090] Specifically, the medium flowing out of the flow channel outlet 20 flows in an axial direction of the flow channel outlet 20 , which facilitates the medium to flow out of the flow channel outlet 20 .

[0091] In one embodiment, the housing is provided with a mounting hole 101, which can also be referred to as a bearing seat, and the mounting hole 101 is used to mount a bearing. The bearing sleeve is disposed outside the screw compression group and between the screw compression group and the mounting hole 101, and the bearing is used to improve the smoothness of the rotation of the screw compression group. As the screw compression group rotates, the spiral groove of the screw compression group can guide the medium to the compression chamber for compression of the medium.

[0092] The axial direction of the mounting hole 101 is the same as the axial direction of the flow channel outlet 20. In this way, the second exhaust flow channel 2 and the mounting hole 101 extend along the thickness direction of the body 100, making full use of the thickness of the body 100 and saving the overall space occupied by the housing.

[0093] It can be understood that, depending on the type of medium, the power required for compression is different, the axial length of the bearing along the first direction is also different, and the depth of the mounting hole 101 and the thickness of the main body 100 will also be different. For example, when the medium is a high-pressure mixed oil and gas, the depth of the mounting hole 101 and the thickness of the main body 100 are relatively small; when the medium is a mixed gas of high-pressure oil and refrigerant or air, the depth of the mounting hole 101 and the thickness of the main body 100 are relatively large.

[0094] In one embodiment, Figure 1-Figure 2 As shown, the first exhaust flow channel 1 is arranged outside the mounting hole 101. That is, the first exhaust flow channel 1 is at least partially arranged around the mounting hole 101, so that the overall length of the first exhaust flow channel 1 is larger, the flow field path of the medium in the first exhaust flow channel 1 is increased, and the noise reduction effect is further improved.

[0095] Of course, the number of mounting holes 101 can be one or two. When the number of mounting holes 101 is one, the first exhaust flow channel 1 is arranged outside the one mounting hole 101; when the number of mounting holes 101 is two, the first exhaust flow channel 1 is arranged around the two mounting holes 101. This embodiment does not limit the number of mounting holes 101, and the number of mounting holes 101 and the shape and structure of the first exhaust flow channel 1 can be adaptively adjusted.

[0096] Since the first exhaust flow channel 1 is at least partially arranged around the mounting hole 101, at least part of the first exhaust flow channel 1 can be an arc-shaped structure. When the medium flows along the inner wall of the first exhaust flow channel 1, the medium will be centrifuged. Due to the different weights of the oil and gas in the medium, oil will be thrown off under the influence of gravity during the centrifugal process, thereby achieving separation of the oil and gas in the medium.

[0097] In one embodiment, the arc of the first exhaust flow channel 1 is 90° to 180°.

[0098] For example, the curvature of the first exhaust channel 1 can be selected to be 90°, 120°, 150°, 180°, etc. The first exhaust channel 1 is not completely surrounded by the outside of the mounting hole 101. The first exhaust channel 1 is half wrapped around the outer periphery of the mounting hole 101, saving the width dimension of the main body 100 along the second direction and reducing the floor space of the main body 100. The first exhaust channel 1 adopts a curvature within this angle range, which can not only ensure the flow field trajectory range required by the centrifugal action of the medium, but also reduce the overall volume of the main body 100 and save manufacturing costs. In addition, the first exhaust channel 1 has a flow direction design that guides the medium to centrifugal oil removal and gravity sedimentation upward, thereby improving the oil-liquid separation efficiency of the medium.

[0099] In one embodiment, the flow channel outlet 20 is located above the flow channel inlet 10 along the height direction of the body 100 .

[0100] Since the gas after the oil-liquid separation of the medium through the first exhaust flow channel 1 is lighter than the oil, the flow channel outlet 20 is arranged above the flow channel inlet 10, so that the lighter gas can be directly discharged through the flow channel outlet 20. It can be understood that the flow channel outlet 20 can be specifically divided into two parts, the upper part is used for the discharge of the lighter gas, and the lower part is used for the discharge of the blocked and heavier oil.

[0101] In one embodiment, Figure 1-Figure 2 As shown, the first exhaust flow channel 1 includes a receiving portion 11, an expansion portion 12 and a contraction portion 13. The receiving portion 11 is connected to the flow channel inlet 10, one end of the expansion portion 12 is connected to the receiving portion 11, and the other end is connected to the contraction portion 13, and the end of the contraction portion 13 away from the expansion portion 12 is connected to the second exhaust flow channel 2.

[0102] The receiving portion 11 may be an annular groove arranged around the flow channel inlet 10. The receiving portion 11 is used to receive the medium flowing in from the flow channel inlet 10. The expansion portion 12 is arranged along the outer periphery of the mounting hole 101. The expansion portion 12 and the mounting hole 101 are adapted in shape, and the space utilization rate is high. The medium enters the second exhaust flow channel 2 through the receiving portion 11, the expansion portion 12, and the contraction portion 13 in sequence, and is discharged from the flow channel outlet 20. That is, along the flow direction of the medium, the receiving portion 11 and the contraction portion 13 are the head end and the end end of the first exhaust flow channel 1, and the expansion portion 12 is the middle end of the first exhaust flow channel 1.

[0103] It should be particularly noted that the arc-shaped flow field starting from the receiving portion 11 and ending at the contraction portion 13 is substantially the arc expansion angle of the first exhaust flow channel 1 .

[0104] Among them, Figure 1 and Figure 3 As shown, the cross-sectional area of ​​the expansion portion 12 is larger than the cross-sectional area of ​​the receiving portion 11 , and the cross-sectional area of ​​the expansion portion 12 is larger than the cross-sectional area of ​​the contraction portion 13 .

[0105] That is, the cross-sectional areas of the receiving portion 11 and the contraction portion 13 located at the head end and the end of the first exhaust flow channel 1 are smaller than the cross-sectional area of ​​the expansion portion 12 located at the middle end of the first exhaust flow channel 1. The first exhaust flow channel 1 has an expansion chamber. The first exhaust flow channel 1 is a variable cross-sectional structure. By changing the cross-sectional area of ​​the first exhaust flow channel 1, the flow velocity of the medium changes when the medium velocity is constant, and the sound impedance of the medium is changed, resulting in sound wave reflection interference, and the noise wavelength is destroyed, thereby achieving the purpose of silencing.

[0106] At the same time, the cross-sectional area of ​​the medium changes continuously while flowing along the inner wall of the first exhaust flow channel 1, and the cross-sectional area of ​​the first exhaust flow channel 1 is small, large, and small in sequence, which reduces the wavelength of the noise part, reduces the pulsation of the medium, and reduces the noise of the compressor.

[0107] It can be understood that the receiving part 11, the expansion part 12 and the contraction part 13 are specifically an integrally molded structure, and a groove is opened on the side of the main body 100 away from the flow channel outlet 20. The cross-section of the groove is a variable structure, and the receiving part 11, the expansion part 12 and the contraction part 13 are divided according to the size of the cross-section of the groove at different positions.

[0108] The width direction B of the first exhaust flow channel 1 is perpendicular to the flow direction W of the medium in the first exhaust flow channel 1, and is perpendicular to the axial direction where the flow channel outlet 20 is located. It can be understood that since the first exhaust flow channel 1 is at least partially an arc-shaped structure, the flow direction of the medium in the first exhaust flow channel 1 is not fixed but variable, and the width direction of the first exhaust flow channel 1 is also variable, but the plane where the width direction of the first exhaust flow channel 1 and the second direction are located is determined, and the plane and the first direction are perpendicular to each other.

[0109] In one embodiment, along the width direction of the first exhaust flow channel 1 , the width of the expansion portion 12 is greater than the width of the receiving portion 11 , and the width of the expansion portion 12 is greater than the width of the contraction portion 13 .

[0110] Since the cross-sectional area of ​​the first exhaust channel 1 is equal to the product of the width of the first exhaust channel 1 and the depth of the first exhaust channel 1, the depth direction of the first exhaust channel 1 is G, and the depth direction G of the first exhaust channel 1 is the first direction D1, and the width direction B is the shortest distance direction between the outer inner wall 1101 and the inner outer wall 1102. When the depth of the first exhaust channel 1 is constant, the width of the expansion portion 12 is greater than the widths of the receiving portion 11 and the contraction portion 13, so that the width of the first exhaust channel 1 shows a trend of small, large, and small. By changing the width of the first exhaust channel 1, the probability of sound wave reflection interference along the width direction of the first exhaust channel 1 is increased, and the noise wavelength is destroyed, thereby achieving the purpose of silencing.

[0111] In one embodiment, along the axial direction where the flow channel outlet 20 is located, the depth of the expansion portion 12 is greater than the depth of the receiving portion 11 , and the depth of the expansion portion 12 is greater than the depth of the contraction portion 13 .

[0112] Since the cross-sectional area of ​​the first exhaust flow channel 1 is equal to the product of the width of the first exhaust flow channel 1 and the depth of the first exhaust flow channel 1, when the width of the first exhaust flow channel 1 is constant, the depth of the expansion portion 12 is greater than the depths of the receiving portion 11 and the contraction portion 13, so that the depth of the first exhaust flow channel 1 shows a trend of shallow, deep, and shallow. By changing the depth of the first exhaust flow channel 1, the probability of sound wave reflection and interference along the depth direction of the first exhaust flow channel 1 is increased, and the wavelength of noise is destroyed, thereby achieving the purpose of silencing.

[0113] It is understandable that the receiving portion 11, the expansion portion 12 and the contraction portion 13 of the first exhaust channel 1 may only change in width, only change in depth, or change in both width and depth. The width and depth changes of the first exhaust channel 1 may be adjusted according to actual production needs.

[0114] This embodiment also provides a screw compressor, including the above-mentioned casing, which is used to reduce the noise of the screw compressor and can perform preliminary oil filtering before the medium leaves the compressor, reducing the load of the rear-end oil filter screen and improving the oil separation effect and production efficiency.

[0115] This embodiment also provides an air compressor, including the above-mentioned screw compressor, which achieves the dual effects of silencing and noise reduction and oil-liquid separation.

[0116] Embodiment 2

[0117] This embodiment is similar to the first embodiment, and the difference lies only in the detailed structure of the body 100 .

[0118] like Figure 4-Figure 6 As shown, the housing provided in this embodiment further includes a blocking structure 3, which is disposed inside at least one of the first exhaust flow channel 1 and the second exhaust flow channel 2, and is used for oil and gas separation of the medium.

[0119] The blocking structure 3 may be disposed only in the first exhaust flow channel 1, or only in the second exhaust flow channel 2, or in both the first exhaust flow channel 1 and the second exhaust flow channel 2. Since the medium generates a centrifugal effect through the first exhaust flow channel 1, oil and gas separation of the medium is achieved. By disposing the blocking structure 3 in the first exhaust flow channel 1 and / or the second exhaust flow channel 2, the oil and gas separation effect is further improved, thereby improving the preliminary oil filtering effect of the medium before leaving the compressor.

[0120] In one embodiment, Figure 4-Figure 6 As shown, the blocking structure 3 includes a first baffle 31, which is arranged at least one of the first exhaust channel 1 and the second exhaust channel 2 close to each other. The first baffle 31 is used to block the oil after oil and gas separation in the first exhaust channel 1.

[0121] The first baffle 31 may be a flat plate structure, and the shape of the first baffle 31 may be a square, a rectangle or other shapes, which may be adjusted and selected according to actual conditions. The first baffle 31 may also be arranged in the second exhaust flow channel 2; the first baffle 31 may also be arranged only in the first exhaust flow channel 1 or at the connection position between the first exhaust flow channel 1 and the second exhaust flow channel 2, so that the medium can block the oil before entering the second exhaust flow channel 2, thereby improving the cleanliness of the exhaust gas from the second exhaust flow channel 2. The medium is separated from the oil and liquid after centrifugation in the first exhaust flow channel 1, and the first baffle 31 can be used to block the oil and liquid, thereby preventing the medium from mixing again after the oil and liquid separation, thereby improving the thoroughness and reliability of the oil and liquid separation.

[0122] Exemplarily, the first baffle 31 extends along the height direction of the main body 100, and the first baffle 31 is perpendicular to or forms an angle with the flow direction W of the medium flowing out from the end of the first exhaust channel 1, so that the medium flowing out from the first exhaust channel 1 just directly impacts the first baffle 31, and the first baffle 31 has a good liquid blocking effect.

[0123] In one embodiment, Figure 3 As shown, along the width direction of the first exhaust flow channel 1 , the first baffle 31 is connected to the outer inner wall 1101 of the first exhaust flow channel 1 .

[0124] Since the oil in the medium is heavy, when the medium flows along the inner wall of the first exhaust flow channel 1, the oil will be thrown up under the centrifugal effect, causing the oil to gradually gather on the outer inner wall 1101 of the first exhaust flow channel 1. In the process of the medium flowing, the oil is affected by gravity and the oil will continue to settle below the first exhaust flow channel 1. When part of the oil reaches the end of the first exhaust flow channel 1, it is exactly at the highest position along the height direction of the body 100. At the same time, since the upper part of the flow channel outlet 20 is used to discharge lighter gas, the first baffle 31 is connected to the outer inner wall 1101 of the first exhaust flow channel 1. The first baffle 31 just blocks the oil thrown up by centrifugation, and the first baffle 31 corresponds to the upper part of the flow channel outlet 20, preventing the separated and thrown oil from entering the upper part of the flow channel outlet 20 through the second exhaust flow channel 2, further improving the oil separation effect.

[0125] In one embodiment, Figure 4-Figure 6 As shown, along the axial direction where the flow channel outlet 20 is located, the first baffle 31 is connected to the bottom wall 1103 of the first exhaust flow channel 1 close to the second exhaust flow channel 2.

[0126] That is, two side surfaces of the first baffle 31 are respectively connected to the bottom wall 1103 and the outer inner wall 1101 of the first exhaust flow channel 1, so that there is no gap between the first baffle 31 and the upper end of the first exhaust flow channel 1, thereby avoiding the risk of the oil thrown up by centrifugation entering the second exhaust flow channel 2 through the gap. At the same time, both side surfaces of the first baffle 31 are connected to the first exhaust flow channel 1, increasing the fixed points between the first baffle 31 and the first exhaust flow channel 1, and improving the position stability of the first baffle 31.

[0127] In one embodiment, Figure 7 As shown, along the axial direction of the flow channel outlet 20, the depth L1 of the first baffle 31 is less than the depth L of the first exhaust flow channel 1 at the position corresponding to the first baffle 31. The depth direction of the first baffle 31 is the first direction D1.

[0128] With this arrangement, along the axial direction of the flow channel outlet 20, there is a gap between the top wall of the first exhaust flow channel 1 away from the second exhaust flow channel 2 and the first baffle 31, that is, the first baffle 31 is a semi-closed baffle arranged in the first exhaust flow channel 1, and the medium after oil-liquid separation can enter the second exhaust flow channel 2 through the gap. The first baffle 31 will not affect the normal discharge of the gas while blocking the oil flowing close to the outer inner wall 1101.

[0129] The ratio of the depth L1 of the first baffle 31 to the depth L of the first exhaust channel 1 at the position corresponding to the first baffle 31 is 0.25 to 0.5. For example, the ratio of the depth L1 of the first baffle 31 to the depth L of the first exhaust channel 1 at the position corresponding to the first baffle 31 is 1 / 4, 1 / 3, or 1 / 2, so that the end of the first exhaust channel 1 has at least more than half of the space in the depth direction for gas circulation, thereby improving the smoothness of gas discharge.

[0130] In one embodiment, Figure 8 As shown, along the height direction of the body 100, the ratio of the height H1 of the first baffle 31 to the height H of the first exhaust channel 1 at the position corresponding to the first baffle 31 is 1 / 2 to 2 / 3. For example, the ratio of the height H1 of the first baffle 31 to the height H of the first exhaust channel 1 at the position corresponding to the first baffle 31 can be selected as 0.5, 0.55, or 0.6, so that the end of the first exhaust channel 1 has at least half of the space in the height direction for gas circulation, thereby improving the smoothness of gas discharge.

[0131] In this way, the free end of the first baffle 31 along the third direction D3 and not connected to the first exhaust channel 1 is approximately in the middle or lower position of the first exhaust channel 1, so that the space at the end of the first exhaust channel 1 used for exhaust is approximately 1 / 2 to 2 / 3 of the entire space, and the space at the end of the first exhaust channel 1 used for oil discharge is approximately 1 / 3 to 1 / 2 of the entire space.

[0132] In one embodiment, Figure 4-Figure 8 As shown, the blocking structure 3 further includes a second baffle 32 , which is disposed in the second exhaust flow channel 2 , and the second baffle 32 separates the cavity of the second exhaust flow channel 2 into an oil drain cavity 21 and an exhaust cavity 22 .

[0133] The second baffle 32 can be used to separate the cavity of the second exhaust flow channel 2. The second baffle 32 plays a role of isolation, so that the oil discharge chamber 21 and the exhaust chamber 22 are two independent chambers, reducing the risk of the oil and gas in the second exhaust flow channel 2 being mixed again. Among them, the exhaust chamber 22 and the oil discharge chamber 21 are arranged up and down along the height direction of the body 100. Since the gas in the medium is relatively light, the gas can enter the exhaust chamber 22 located above, and the oil in the medium is relatively heavy, and the oil can be deposited in the oil discharge chamber 21 located below.

[0134] Exemplarily, at least part of the second baffle plate 32 is a flat plate structure, that is, the second baffle plate 32 is a bare plate structure without any through holes, thereby ensuring complete isolation of the exhaust cavity 22 and the oil drain cavity 21 .

[0135] In addition, at least part of the first baffle 31 is a flat plate structure, that is, the first baffle 31 is a bare plate structure without a through hole 30, ensuring that the oil close to the outer inner wall 1101 of the first exhaust channel 1 can be blocked and settled before entering the oil discharge cavity 21 of the second exhaust channel 2. Figure 9-12 As shown, the first baffle plate 31 may also be at least partially provided with a through hole 30, and the through hole 30 is at least one of a circular hole, an oblong hole, an elliptical hole and a polygonal hole, and the through hole 30 serves to reduce the pressure loss of the airflow passing through the first baffle plate 31; in addition, the through hole 30 is arranged on the side of the first baffle plate 31 close to the outer inner wall 1101 of the first exhaust channel 1, and the through hole 30 can be further arranged on the first baffle plate 31 away from the outer inner wall 1101 of the first exhaust channel 1, and the first baffle plate 31 close to the outer inner wall 1101 is a light plate structure, so that both the effect of blocking oil and the effect of reducing the pressure loss of airflow can be achieved.

[0136] In one embodiment, the flow channel outlet 20 includes a flow channel oil discharge outlet (not shown in the figure) and a flow channel exhaust outlet (not shown in the figure), the oil discharge outlet is connected to the oil discharge chamber 21, and the flow channel exhaust outlet is connected to the exhaust chamber 22. That is, the flow channel outlet 20 is also divided into two parts, corresponding to the exhaust chamber 22 and the oil discharge chamber 21, respectively, so as to facilitate the discharge of oil and gas after oil separation.

[0137] Specifically, the flow channel outlet 20 needs to be connected to two external tubes, one end of one of the external tubes is connected to the flow channel exhaust outlet, and the other end is connected to the oil-gas separation barrel for secondary oil separation; one end of the other external tube is connected to the flow channel oil discharge outlet, and the other end is connected to the oil tank or oil barrel 200 of the compressor and other liquid storage structures to achieve oil recycling.

[0138] In one embodiment, the second baffle 32 is extended in the axial direction of the flow channel outlet 20, so that the length range of the oil discharge chamber 21 and the exhaust chamber 22 is relatively large, reducing the risk of gas and oil mixing during the flow of the medium along the second exhaust flow channel 2.

[0139] In one embodiment, Figure 4-Figure 8 As shown, the second baffle 32 and the first baffle 31 are connected to each other to improve the position stability of the two baffles. For example, the first baffle 31 and the second baffle 32 are directly connected without a gap therebetween, so that the centrifugally separated oil can flow to the oil discharge chamber 21 along the sides of the first baffle 31 and the second baffle 32 after being blocked by the first baffle 31, and the first baffle 31 and the second baffle 32 play the role of drainage and guidance.

[0140] In one embodiment, the second baffle 32 and the first baffle 31 are arranged at an angle, and the angle between the first baffle 31 and the second baffle 32 can be an obtuse angle or a right angle. For example, the first baffle 31 is arranged vertically, and the second baffle 32 is arranged horizontally, that is, the second baffle 32 is arranged parallel to the plane where the first direction and the second direction are located, the first baffle 31 and the second baffle 32 are perpendicular to each other, and the angle between the first baffle 31 and the second baffle 32 is 90°.

[0141] In one embodiment, along the height direction of the body 100 , the ratio of the height H1 of the second baffle 32 to the height H of the second exhaust flow channel 2 is 1 / 2 to 2 / 3.

[0142] For example, the ratio of the height H1 of the second baffle 32 to the height H of the second exhaust channel 2 can be selected to be 0.5, 0.55, or 0.6, which can ensure that the second baffle 32 and the first baffle 31 are approximately at the same level and can approximately divide the cavity of the second exhaust channel 2 into two halves, thereby improving the smoothness of oil and gas discharge.

[0143] In this way, the second baffle 32 is approximately located in the middle or lower position of the second exhaust channel 2, so that the space used for exhaust in the second exhaust channel 2 is approximately 1 / 2 to 2 / 3 of the entire space of the second exhaust channel 2, and the space used for oil discharge in the second exhaust channel 2 is approximately 1 / 3 to 1 / 2 of the entire space of the second exhaust channel 2.

[0144] It is understandable that the first baffle 31 and the second baffle 32 may be an integrally formed structure, or the first baffle 31, the second baffle 32 and the body 100 may be an integrally formed structure, which reduces the time for assembling parts and reduces production costs.

[0145] Embodiment 3

[0146] This embodiment is similar to the first embodiment, and the difference lies only in the specific details of the blocking structure 3.

[0147] like Fig.13 As shown, the blocking structure 3 provided in this embodiment includes a third baffle 33, the third baffle 33 is located at one end of the first exhaust flow channel 1 close to the flow channel inlet 10, one end of the third baffle 33 is connected to the outer inner wall 1101 of the first exhaust flow channel 1, and a gap is provided between the other end of the third baffle 33 and the inner outer wall 1102 of the first exhaust flow channel 1. In the width direction B of the first exhaust flow channel 1, the outer inner wall 1101 of the first exhaust flow channel 1 is the right inner wall of the first exhaust flow channel 1 away from the mounting hole 101, and the inner outer wall 1102 of the first exhaust flow channel 1 is the left inner wall of the first exhaust flow channel 1 close to the mounting hole 101.

[0148] That is, the third baffle 33 is approximately close to the expansion portion 12 in the first exhaust flow channel 1 along the third direction and away from the middle and lower part of the second exhaust flow channel 2. Since the oil of the medium is relatively heavy, most of the oil will be deposited at the bottom of the expansion portion 12 after entering the expansion portion 12, and a small part of the oil will be centrifuged. The third baffle 33 is arranged on the outer inner wall 1101 of the first exhaust flow channel 1. The position of the third baffle 33 corresponds to the position of the oil thrown up by centrifugation. The third baffle 33 plays a blocking role for the oil flowing close to the outer inner wall 1101, so that the oil after centrifugation is blocked and flows to the bottom of the expansion portion 12. In addition, the gap between the other end of the third baffle 33 and the inner outer wall 1102 of the first exhaust flow channel 1 can be used as a gas flow channel, so that the gas can enter the contraction portion 13 and the second exhaust flow channel 2 through the gap.

[0149] The third baffle plate 33 is at least one of a flat plate and an arc-shaped plate, and the specific shape and structure of the third baffle plate 33 can be adjusted according to actual production conditions.

[0150] Specifically, an oil discharge structure is provided in the first exhaust flow channel 1 , and the oil discharge structure is provided corresponding to the third baffle 33 . The oil discharge structure is used to discharge oil in the medium, and the second exhaust flow channel 2 is used to discharge gas in the medium.

[0151] Since the oil discharge structure is arranged corresponding to the third baffle 33, the oil discharge structure can directly discharge the oil blocked or deposited by the third baffle 33. The oil at this time may be pure oil or an oil-gas mixture partially mixed with gas. The second exhaust flow channel 2 can be used to discharge only the gas in the medium, and the flow channel outlet 20 is the outlet of the pure exhaust gas.

[0152] In one embodiment, Figure 13-Figure 15 As shown, the oil drainage structure includes an oil drainage hole 41 arranged in the first exhaust channel 1, and the oil drainage hole 41 is connected to the first exhaust channel 1, so that the oil deposited at the bottom of the expansion part 12 is directly discharged into the oil storage tank or the oil barrel 200 through the oil drainage hole 41, which is convenient for oil recovery and utilization.

[0153] In this way, the casing provided by the present invention only needs to be connected to an external tube, one end of the external tube is connected to the flow channel outlet 20, and the other end is connected to the oil-gas separation barrel for secondary oil separation, reducing the number of external tubes and saving production costs.

[0154] In one embodiment, Figure 16-Figure 19 As shown, the oil drainage structure includes an oil drainage pipe 42, which is penetrated through the main body 100 and communicated with the first exhaust flow channel 1, so that the oil deposited at the bottom of the expansion part 12 is directly discharged into the oil storage tank or the oil barrel 200 through the oil drainage pipe 42, so as to facilitate the recovery and utilization of the oil.

[0155] The oil drain pipe 42 and the third baffle plate 33 can be assembled separately or in an integrated structure, which reduces the time for assembling the parts of the third baffle plate 33 and the oil drain pipe 42. During manufacturing, a notch can be cut at one end of the oil drain pipe 42, and the remaining part of one end of the oil drain pipe 42 can be directly used as the third baffle plate 33, and the oil blocked by the third baffle plate 33 can be discharged smoothly through the oil drain pipe 42.

[0156] It should be noted that the embodiments of the present invention are shown in the drawings and described in this specification is only an example of the principle of the present invention. It should be clearly understood by those skilled in the art that the principle of the present invention is not limited to any details or any components of the device shown in the drawings or described in the specification.

[0157] It should be understood that the utility model does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The utility model can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned deformation forms and modified forms fall within the scope of the utility model. It should be understood that the utility model disclosed and defined in this specification extends to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the utility model. The embodiments described in this specification illustrate the best known methods for implementing the utility model and will enable those skilled in the art to utilize the utility model.

[0158] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variation, use, or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and example embodiments are to be considered as exemplary only, and the true scope and spirit of the present invention are indicated by the appended claims.

[0159] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of protection of the present invention is limited only by the appended claims.

Claims

1. A housing, characterized in that: include: A body, wherein a first exhaust flow channel and a second exhaust flow channel are disposed in the body, one end of the first exhaust flow channel is provided with a flow channel inlet, and the other end is connected to the second exhaust flow channel, and one end of the second exhaust flow channel away from the first exhaust flow channel is provided with a flow channel outlet; Wherein, the plane where the first exhaust flow channel is located and the axial direction of the second exhaust flow channel are arranged at an angle.

2. The housing according to claim 1, characterized in that: At least a portion of the first exhaust flow channel is an arc-shaped structure, and the arc of the first exhaust flow channel is 90° to 180°.

3. The housing according to claim 2, characterized in that: The flow channel outlet is located above the flow channel inlet along the height direction of the body; Wherein, the height direction of the main body and the axial direction of the flow channel outlet are perpendicular to each other.

4. The housing according to claim 1, characterized in that: The first exhaust flow channel comprises a receiving portion, an expansion portion and a contraction portion, the receiving portion is connected to the flow channel inlet, one end of the expansion portion is connected to the receiving portion, and the other end is connected to the contraction portion, and one end of the contraction portion away from the expansion portion is connected to the second exhaust flow channel; Wherein, the cross-sectional area of ​​the expansion portion is larger than the cross-sectional area of ​​the contraction portion.

5. The housing according to claim 4, characterized in that: The cross-sectional area of ​​the expansion portion is larger than the cross-sectional area of ​​the receiving portion.

6. The housing according to claim 4, characterized in that: Along the axial direction of the flow channel outlet, the depth of the expansion portion is greater than the depth of the receiving portion, and the depth of the expansion portion is greater than the depth of the contraction portion; and / or, along the width direction of the first exhaust flow channel, the width of the expansion portion is greater than the width of the receiving portion, and the width of the expansion portion is greater than the width of the contraction portion; The width direction of the first exhaust flow channel is perpendicular to the flow direction of the medium in the first exhaust flow channel, and is perpendicular to the axial direction of the flow channel outlet.

7. The housing according to any one of claims 1 to 6, characterized in that: The housing also includes: A blocking structure is disposed inside at least one of the first exhaust flow channel and the second exhaust flow channel, and is used for oil and gas separation of the medium.

8. The housing according to claim 7, characterized in that: The blocking structure comprises: A first baffle is disposed at least one of the first exhaust flow channel and the second exhaust flow channel close to each other, and the first baffle is used to block the oil after oil and gas separation in the first exhaust flow channel.

9. The housing according to claim 8, characterized in that: The first baffle is connected to the outer inner wall of the first exhaust flow channel along the width direction of the first exhaust flow channel; And / or, along the axial direction of the flow channel outlet, the first baffle is connected to the bottom wall of the first exhaust flow channel on a side close to the second exhaust flow channel.

10. The housing according to claim 8, characterized in that: Along the axial direction at the location of the flow channel outlet, the depth of the first baffle is smaller than the depth of the first exhaust flow channel at a location corresponding to the first baffle.

11. The housing according to claim 10, characterized in that: The ratio of the depth of the first baffle plate to the depth of the first exhaust flow channel at a position corresponding to the first baffle plate is 0.25-0.

5.

12. The housing according to claim 8, characterized in that: The blocking structure further includes a second baffle, which is disposed in the second exhaust flow channel, and the second baffle separates the cavity of the second exhaust flow channel into an oil drain cavity and an exhaust cavity; The flow channel outlet includes a flow channel oil discharge outlet and a flow channel exhaust outlet. The oil discharge outlet is communicated with the oil discharge cavity, and the flow channel exhaust outlet is communicated with the exhaust cavity.

13. The housing according to claim 12, characterized in that: The second baffle is extended along the axial direction of the flow channel outlet, and the second baffle is connected to the first baffle and is arranged at an angle.

14. The housing according to claim 12, wherein: Along the height direction of the body, the ratio of the height of the second baffle plate to the height of the second exhaust flow channel is 1 / 2 to 2 / 3; Wherein, the height direction of the main body and the axial direction of the flow channel outlet are perpendicular to each other.

15. The housing according to claim 12, wherein: The second baffle is at least partially a flat plate structure; And / or, the second baffle is at least partially provided with a through hole, and the through hole is at least one of a circular hole, an oblong hole, an elliptical hole and a polygonal hole.

16. The housing according to claim 12, wherein: At least part of the first baffle is a flat plate structure; And / or, the first baffle is at least partially provided with a through hole, and the through hole is at least one of a circular hole, an oblong hole, an elliptical hole and a polygonal hole; And / or, the through hole is arranged on a side of the first baffle plate close to the outer inner wall of the first exhaust flow channel.

17. The housing according to claim 7, characterized in that: The blocking structure comprises: a third baffle plate, arranged at one end of the first exhaust flow channel close to the flow channel inlet, with a gap being arranged between the third baffle plate and the inner and outer walls of the first exhaust flow channel; An oil discharge structure is arranged in the first exhaust flow channel, and the oil discharge structure is arranged corresponding to the third baffle. The oil discharge structure is used to discharge oil in the medium, and the second exhaust flow channel is used to discharge gas in the medium.

18. The housing according to claim 17, wherein: The oil drainage structure includes an oil drainage hole disposed in the first exhaust flow channel, and the oil drainage hole is communicated with the first exhaust flow channel.

19. The housing according to claim 17, wherein: The oil drain structure includes an oil drain pipe, which is disposed through the body and communicated with the first exhaust flow channel.

20. The housing according to claim 19, wherein: The oil drain pipe and the third baffle are an integrally formed structure.

21. The housing according to claim 17, wherein: The third baffle is at least one of a flat plate and an arc-shaped plate.

22. A screw compressor, characterized in that: Comprising a casing as claimed in any one of claims 1 to 21.

23. The screw compressor according to claim 22, characterized in that The screw compressor also includes a bearing. The casing is provided with a mounting hole. The bearing is arranged in the mounting hole. The axial direction of the mounting hole is the same as the axial direction of the flow channel outlet. The first exhaust flow channel is arranged outside the mounting hole.

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