Air suction pipe, compressor and refrigeration equipment

Abstract

The air suction pipe comprises a first pipe section and a second pipe section, the second pipe section is arranged at one end of the first pipe section, a welding face is arranged on the peripheral face of the second pipe section, and the welding face is arranged around the axis of the first pipe section. The outer diameter of the welding face is gradually reduced in the direction away from the first pipe section, and on the section passing through the axis of the first pipe section, part of the contour line of the welding face is a straight line section obliquely arranged relative to the axis of the first pipe section, or part of the contour line of the welding face is an arc line section sunken in the direction of the axis of the first pipe section; according to the air suction pipe, the initial contact area of the welding face and the shell can be reduced, so that the contact resistance between the welding face and the shell is increased, resistance heat generated when current passes through the shell and the welding face is increased under the condition that the magnitude of the current is not changed, and the welding quality reliability of the air suction pipe can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor technical field, especially a kind of suction pipe, compressor and refrigeration equipment. BACKGROUND

[0002] Compressor is the key component in refrigeration system, compressor generally includes shell and suction pipe, suction pipe is welded by resistance welding with the outer edge of the through-hole of shell, in traditional technology, the welding quality reliability of suction pipe and shell is low. UTILITY MODEL CONTENTS

[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this reason, the utility model provides a kind of suction pipe, can improve the welding quality reliability of suction pipe and shell.

[0004] The utility model further provides a kind of compressor with the above-mentioned suction pipe.

[0005] The utility model further provides a kind of refrigeration equipment with the above-mentioned compressor.

[0006] According to the suction pipe of the first embodiment of the utility model, the suction pipe includes:

[0007] First pipe section;

[0008] Second pipe section, the second pipe section is located in one end of the first pipe section, the outer circumferential surface of the second pipe section is equipped with welding surface, the welding surface is arranged around the axis of the first pipe section, the outer diameter of the welding surface gradually decreases along the direction away from the first pipe section;

[0009] Wherein, on the section passing through the axis of the first pipe section, part profile line of the welding surface is straight line segment that is inclined to set relative to the axis of the first pipe section, or, part profile line of the welding surface is arc line segment that is concave towards the direction of the axis of the first pipe section.

[0010] According to the suction pipe of the first embodiment of the utility model, at least has following beneficial effects:

[0011] When welding the suction pipe on the shell of the compressor, the electrode pre-presses the suction pipe so that the welding surface abuts against the outer edge of the through hole of the shell, and since the welding surface is a conical surface structure or an arc surface structure that is recessed in the direction close to the axis of the first pipe section, the initial distance between the welding surface and the outer surface of the shell of the compressor can be increased, and on the basis of the electrode pre-pressing the suction pipe, the initial contact area between the welding surface of the conical surface structure and the shell of the compressor, or the initial contact area between the welding surface of the recessed arc surface structure and the shell of the compressor is smaller than the initial contact area between the welding surface of the round surface structure and the shell of the compressor, so that the initial contact area between the welding surface and the shell can be reduced to increase the contact resistance between the welding surface and the shell, the resistance heat generated by the current through the shell and the welding surface is increased without changing the size of the current, and the welding quality reliability of the suction pipe can be improved.

[0012] According to some embodiments of the present application, the first pipe section comprises a first section and a second section connected to one end of the first section, and the second section is connected to the second pipe section away from one end of the first section, and the inner diameter of the second section is greater than the inner diameter of the first section.

[0013] According to some embodiments of the present application, the second section is provided with a first transition section at one end close to the first section, and the inner diameter of the first transition section gradually increases in the direction from the first pipe section to the second pipe section; and / or,

[0014] The second section is provided with a second transition section at one end close to the second pipe section, and the inner diameter of the second transition section gradually increases in the direction from the first pipe section to the second pipe section.

[0015] According to some embodiments of the present application, the second pipe section is provided with a positioning surface at one end close to the first pipe section, and the positioning surface is arranged perpendicularly to the axis of the first pipe section.

[0016] According to some embodiments of the present application, in the cross section passing through the axis of the first pipe section, part of the profile line of the welding surface is a straight line segment arranged obliquely relative to the axis of the first pipe section, and the minimum included angle between the straight line perpendicular to the straight line segment and the axis of the first pipe section is θ, which satisfies: 42.5°≤θ≤47.5°.

[0017] According to some embodiments of the present application, the first pipe section and the second pipe section are of an integral structure.

[0018] According to the compressor of the second embodiment of the present application, the compressor comprises:

[0019] a shell provided with a through hole;

[0020] The suction pipe described in the above embodiment, the second pipe section extends into the through hole from one end away from the first pipe section, and at least part of the welding surface abuts against the outer edge of the through hole.

[0021] According to some embodiments of the present application, the suction pipe further comprises a third pipe section, the third pipe section is arranged at one end of the second pipe section away from the first pipe section, and one end of the third pipe section away from the second pipe section protrudes from the inner wall of the shell.

[0022] According to some embodiments of the present application, the minimum inner diameter of the third pipe section is greater than the minimum inner diameter of the first pipe section.

[0023] According to some embodiments of the present application, the outer surface of the shell is provided with a groove, the through hole is arranged at the bottom wall of the groove, and the bottom wall of the groove is arranged perpendicularly to the axis of the first pipe section.

[0024] According to the third embodiment of the present application, the refrigeration equipment comprises the compressor described in the above embodiments.

[0025] Additional aspects and advantages of the present application will be given in part in the following description, some of which will become apparent from the following description, or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] The present application will be further described below in combination with the drawings and embodiments, in which:

[0027] Figure 1 FIG. 1 is a structural schematic diagram of a suction pipe according to an embodiment of the present application;

[0028] Figure 2 FIG. 2 is a schematic diagram of the internal structure of the suction pipe according to an embodiment of the present application;

[0029] Figure 3 FIG. 3 is a structural schematic diagram of another embodiment of the suction pipe according to an embodiment of the present application;

[0030] Figure 4 FIG. 4 is an assembly schematic diagram of the suction pipe and the shell according to an embodiment of the present application, in which the welding surface is not welded with the shell;

[0031] Figure 5 FIG. 5 is an assembly schematic diagram of the suction pipe and the shell according to an embodiment of the present application, in which the welding surface is welded with the shell;

[0032] Figure 6 FIG. 6 is a partial structural schematic diagram of a compressor according to an embodiment of the present application.

[0033] REFERENCE SIGNS

[0034] Axis O1, first pipe segment 100, first segment 110, second segment 120, first transition segment 121, second transition segment 122, second pipe segment 200, welding surface 201, positioning surface 202, third pipe segment 300, shell 400, through hole 410, groove 420, air suction muffler 500, air suction port 510. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are merely intended to explain the present application, and should not be understood as a limitation of the present application.

[0036] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application, which does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0037] In the description of the present application, the plural means more than two. If there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0038] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0039] In the related art, the compressor generally includes a shell and an air suction pipe, the welding surface of the air suction pipe is a fillet surface structure, when the shell and the welding surface of the air suction pipe are welded, the air suction pipe is pre-pressed by an electrode to make the welding surface stably contact with the shell, since the welding surface is a fillet surface structure, the initial contact area between the shell and the welding surface is relatively large, when resistance welding, the resistance formed by the shell and the air suction pipe is relatively small, which results in that the resistance heat generated by the current passing through the shell and the air suction pipe is relatively small, and thus the welding quality reliability of the air suction pipe is reduced.

[0040] Referring to Figure 1 , Figure 2 and combining Figure 4 , Figure 5 , Figure 1 a structure schematic view of an air suction pipe of an embodiment of the present application is shown, Figure 2 a structure schematic view of an air suction pipe of an embodiment of the present application is shown,Figure 4 and Figure 5 both show the assembly schematic view of the air suction pipe and the shell 400 of the embodiment of the utility model, wherein, Figure 4 the welding surface 201 of the air suction pipe is not welded with the shell 400, Figure 5 the welding surface 201 of the air suction pipe is welded with the shell 400. As shown in the figure, the first embodiment of the utility model proposes an air suction pipe, the air suction pipe includes the first pipe section 100 and the second pipe section 200 connected in turn along the axial direction of the air suction pipe, the outer peripheral surface of the second pipe section 200 is provided with the welding surface 201 for welding with the shell 400 of the compressor, and the welding surface 201 is located on the side of the second pipe section 200 away from the first pipe section 100, the welding surface 201 extends and is arranged around the axis O1 of the first pipe section 100, from the direction of the first pipe section 100 to the second pipe section 200, the outer diameter of the welding surface 201 gradually decreases, wherein, on the cross section passing through the axis O1 of the first pipe section 100, the contour line of the welding surface 201 is a straight line segment, the straight line segment is inclinedly arranged relative to the axis O1 of the first pipe section 100, that is, the welding surface 201 is a conical surface structure, compared with the conventional welding mode of the welding surface 201 with the shell 400 in the round corner surface structure, the initial contact area of the welding surface 201 with the shell 400 can be reduced, the conductive area between the welding surface 201 and the shell 400 can be reduced, the contact resistance can be increased, in the case of not changing the current size, the resistance heat generated by the current passing through the shell 400 and the welding surface 201 increases, and the welding quality reliability of the air suction pipe can be improved.

[0041] For example, when welding the air suction pipe on the shell 400 of the compressor, the air suction pipe is pre-pressed by the electrode to make the welding surface 201 abut against the shell 400, since the welding surface 201 is a conical surface structure, from the direction of the second pipe section 200 to the first pipe section 100, the minimum distance between the welding surface 201 and the axis O1 of the first pipe section 100 gradually increases, the initial distance between the welding surface 201 and the outer surface of the shell 400 of the compressor can be increased, on the basis of pre-pressing the air suction pipe by the electrode, the initial contact area of the welding surface 201 in the conical surface structure with the shell 400 of the compressor is smaller than the initial contact area of the welding surface 201 in the round corner surface structure with the shell 400 of the compressor, the initial contact area of the welding surface 201 with the shell 400 can be reduced to increase the contact resistance between the welding surface 201 and the shell 400, in the case of not changing the current size, the resistance heat generated by the current passing through the shell 400 and the welding surface 201 increases, and the welding quality reliability of the air suction pipe can be improved.

[0042] It should be noted that after the electrode completes the pre-pressing process of the suction pipe, the electrode discharges, and the current passes through the welding surface 201 and the shell 400, so that the welding surface 201 and the shell 400 at the abutting position generate resistance heat, the resistance heat increases with the increase of the resistance, and the metal at the abutting position of the welding surface 201 and the shell 400 can be melted, thereby improving the welding quality reliability of the suction pipe.

[0043] Referring to Figure 3 , Figure 3 Another embodiment of the suction pipe is shown in the structural schematic view. For example Figure 3 As another embodiment, as shown in the figure, on the cross section passing through the axis O1 of the first pipe section 100, the contour line of the welding surface 201 is an arc segment, the arc segment is recessed in the direction close to the axis O1 of the first pipe section 100, and the minimum distance between the arc segment and the axis O1 of the first pipe section 100 is smaller than the minimum distance between the above straight line segment and the axis O1 of the first pipe section 100. Also, the initial contact area between the welding surface 201 and the shell 400 can be reduced, and the welding quality reliability of the suction pipe can be improved.

[0044] It can be understood that the welding surface 201 of the traditional round corner surface structure is an outward convex round corner surface structure, and the welding surface 201 of the present embodiment is a conical surface structure or an inward recessed arc surface structure, which will not be described here.

[0045] It should be noted that the shell 400 of the compressor is provided with a through hole 410 for the suction pipe to communicate with the inner cavity of the shell 400. When welding the suction pipe, the end of the welding surface 201 away from the first pipe section 100 can extend to the inside of the through hole 410, and the welding surface 201 abuts at the opening of the through hole 410. The welding surface 201 can be pre-positioned to make the axis O1 of the first pipe section 100 and the axis O1 of the through hole 410 coaxial, which will not be described here.

[0046] As another embodiment, on the cross section passing through the axis O1 of the first pipe section 100, the contour line of the welding surface 201 can also be a combination of a straight line segment and an arc segment, wherein the straight line segment is a straight line segment inclined relative to the axis O1 of the first pipe section 100, and the arc segment is recessed in the direction close to the axis O1 of the first pipe section 100, which is not limited here.

[0047] For example Figure 1 , Figure 2As shown, in the embodiment, the first pipe section 100 comprises a first section 110 and a second section 120 connected in sequence along the axial direction of the first pipe section 100, the second section 120 is connected with the second pipe section 200 at the end away from the first section 110, and the inner diameter of the second section 120 is greater than that of the first section 110. On the one hand, this is conducive to reducing the flow resistance of the refrigerant, increasing the flow rate of the refrigerant in the suction pipe, and improving the refrigeration performance of the compressor. On the other hand, it can avoid the problem that the effective flow area of the second section 120 is reduced due to local deformation of the second section 120 in the process of welding, pipe bending or handling, thereby affecting the suction flow rate of the compressor.

[0048] For example, in the process of welding, pipe bending or handling, the second section 120 may be locally deformed to reduce the effective flow area of the second section 120. By increasing the inner diameter of the second section 120, the effective flow area of the second section 120 can be increased. Even if the second section 120 is deformed to reduce the opening, the effective flow area of the second section 120 is still greater than that of the first pipe section 100, which is conducive to reducing the flow resistance of the refrigerant, increasing the flow rate of the refrigerant in the suction pipe, and thereby improving the refrigeration performance of the compressor.

[0049] For example Figure 2 As shown, in the embodiment, the end of the second section 120 close to the first section 110 is provided with a first transition section 121. In the cross section passing through the axis O1 of the first pipe section 100, the profile line of the inner periphery surface of the first transition section 121 is a straight line segment, the straight line segment is inclined with respect to the axis O1 of the first pipe section 100, and the inner diameter of the first transition section 121 gradually increases in the direction away from the first section 110, i.e., the inner periphery surface of the first transition section 121 is a conical surface structure. On the one hand, it can guide the refrigerant in the suction pipe to flow from the second pipe section 200 to the first pipe section 100, so that the flow trajectory of the refrigerant in the suction pipe is more regular. On the other hand, it can improve the structural strength of the first pipe section 100 to improve the service life of the suction pipe.

[0050] As another embodiment, in the cross section passing through the axis O1 of the first pipe section 100, the profile line of the inner periphery surface of the first transition section 121 can also be a circular arc line segment, i.e., the inner periphery surface of the first transition section 121 is a rounded surface structure, which can also guide the refrigerant in the suction pipe to flow from the second pipe section 200 to the first pipe section 100, and details are not repeated here.

[0051] In the embodiment, the second transition section 122 is arranged at one end of the second pipe section 200 close to the first pipe section 100, and the profile line of the inner circumferential surface of the second transition section 122 is a circular arc segment on the cross section passing through the axis O1 of the first pipe section 100, that is, the inner circumferential surface of the second transition section 122 is a rounded surface structure. On the one hand, the rounded surface structure can guide the refrigerant in the suction pipe to flow from the second pipe section 200 to the first pipe section 100, so that the flow trajectory of the refrigerant in the suction pipe is more regular. On the other hand, the rounded surface structure can improve the structural strength of the first pipe section 100, so as to improve the service life of the suction pipe.

[0052] As another implementation, the profile line of the inner circumferential surface of the second transition section 122 can also be a straight line segment arranged obliquely relative to the axis O1 of the first pipe section 100 on the cross section passing through the axis O1 of the first pipe section 100. In the direction away from the first pipe section 100, the inner diameter of the second transition section 122 gradually increases, that is, the inner circumferential surface of the first transition section 121 is a conical surface structure. The conical surface structure can also guide the refrigerant in the suction pipe to flow from the second pipe section 200 to the first pipe section 100, and details are not repeated here.

[0053] For example Figure 2 As shown in the figure, in the embodiment, the second pipe section 200 is arranged with a positioning surface 202 close to one side of the first pipe section 100. The positioning surface 202 is an annular structure. The inner side of the positioning surface 202 extends to contact the outer circumferential surface of the first pipe section 100, and the outer side of the positioning surface 202 extends to contact the outer circumferential surface of the second pipe section 200. The axis O1 of the first pipe section 100 is arranged perpendicularly to the positioning surface 202. When the resistance-welded suction pipe is used, the electrode abuts against the positioning surface 202 to push the welding surface 201 into contact with the shell 400 of the compressor. Since the positioning surface 202 is arranged perpendicularly to the axis O1 of the first pipe section 100, the electrode can exert a force parallel to the axial direction of the first pipe section 100 to the second pipe section 200, so that the molten welding surface 201 can closely adhere to the outer surface of the shell 400, thereby improving the welding quality reliability of the suction pipe.

[0054] In the embodiment, on the basis that the profile line of the welding surface 201 is a straight line on the cross section passing through the axis O1 of the first pipe section 100, the angle between the straight line perpendicular to the profile line of the welding surface 201 and the axis O1 of the first pipe section 100 is θ, and 42.5°≤θ≤47.5° is satisfied. On the one hand, the initial contact area of the welding surface 201 with the shell 400 can be reduced to ensure the welding quality reliability of the suction pipe. On the other hand, after the resistance welding is completed, the contact area of the welding surface 201 with the shell 400 can be increased to ensure that the suction pipe is firmly welded.

[0055] For example, if the angle is greater than 47.5°, the maximum initial distance between the welding surface 201 and the outer surface of the shell 400 is too large, and the part of the welding surface 201 away from the axis O1 of the first pipe section 100 cannot be completely attached to the outer surface of the shell 400 without changing the pre-pressure of the electrode applied to the second pipe section 200, the contact area between the welding surface 201 and the shell 400 is reduced, and the air suction pipe is prone to looseness; if the angle is less than 42.5°, the maximum initial distance between the welding surface 201 and the outer surface of the shell 400 is too small, and the second pipe section 200 deforms when the electrode pre-presses the second pipe section 200, resulting in an increase in the initial contact area between the welding surface 201 and the shell 400, an increase in the conductive area between the welding surface 201 and the shell 400, a reduction in the contact resistance between the welding surface 201 and the shell 400, a reduction in the resistance heat generated between the welding surface 201 and the shell 400 when the electrode is powered on, and a reduction in the welding quality reliability of the air suction pipe. Therefore, by configuring the angle between the straight line perpendicular to the welding surface 201 and the axis O1 of the first pipe section 100 to be greater than or equal to 42.5° and less than or equal to 47.5°, the welding quality reliability of the air suction pipe can be improved.

[0056] It should be noted that the value of the angle can be 42.5°, 43°, 43.5°, 44°, 44.5°, 45°, 45.5°, 46°, 46.5°, 47°, 47.5°, and is not limited herein.

[0057] In this embodiment, the first pipe section 100 and the second pipe section 200 are of an integrated structure, which can reduce the number of molds to reduce the production cost of the molds and thus the production cost of the air suction pipe.

[0058] For example, the wall thicknesses of the first pipe section 100 and the second pipe section 200 are equal and uniform, so that the first pipe section 100 and the second pipe section 200 can be integrally formed by extrusion molding, which can reduce the number of molds to reduce the production cost of the molds and thus the production cost of the air suction pipe.

[0059] As another embodiment, the first pipe section 100 and the second pipe section 200 can also be connected and fixed by welding, wherein the welding methods include but are not limited to resistance welding, laser welding, or ultrasonic welding.

[0060] Referring to Figure 6 , Figure 6 A partial structure schematic diagram of a compressor according to an embodiment of the present application is shown. For example Figure 6The utility model discloses a compressor, the compressor includes shell 400 and the suction pipe of above -mentioned embodiment, shell 400 is equipped with through -hole 410, the one end of second pipe section 200 away from first pipe section 100 extends to the inside of through -hole 410, and at least partial welding surface 201 and the outer edge of through -hole 410 abut, under the condition that the current size is not changed, the resistance heat that current passes through shell 400 and welding surface 201 generates increases, can improve the welding quality reliability of suction pipe.

[0061] For example, adopt the suction pipe of the utility model first embodiment, when welding the suction pipe on shell 400, the electrode pre -presses the suction pipe, to make welding surface 201 and shell 400 abut, because on the cross section that passes through the axis O1 of first pipe section 100, the contour line of welding surface 201 is the linear segment that is obliquely arranged with the axis O1 of first pipe section 100, or, the contour line of welding surface 201 is the arc segment that is recessed along the direction close to the axis O1 of first pipe section 100, can increase the initial spacing of welding surface 201 and the outer surface of the shell 400 of compressor, on the basis of electrode pre -presses the suction pipe, the initial contact area of the welding surface 201 of conical surface structure or the concave arc surface structure and the shell 400 of compressor is less than the initial contact area of the welding surface 201 of the round corner surface structure and the shell 400 of compressor, can reduce the initial contact area of welding surface 201 and shell 400, to increase the contact resistance between welding surface 201 and shell 400, under the condition that the current size is not changed, the resistance heat that current passes through shell 400 and welding surface 201 generates increases, can improve the welding quality reliability of suction pipe.

[0062] It should be pointed out that the outside of shell 400 is equipped with recess 420, through -hole 410 is located at the bottom wall of recess 420, and the bottom wall of recess 420 is a plane perpendicular to the axis of first pipe section 100, and at least part of welding surface 201 is welded to the bottom wall of recess 420 during resistance welding, which can ensure the welding contact area of welding surface 201 and the shell, thereby improving the welding quality reliability of the suction pipe.

[0063] In this embodiment, the suction pipe further includes a third pipe section 300 connected to the end of the second pipe section 200 away from the first pipe section 100. The end of the third pipe section 300 away from the second pipe section 200 extends to the inner cavity of the shell 400, so that the end of the third pipe section 300 away from the second pipe section 200 protrudes from the inner wall of the shell 400. On the one hand, this can prevent the refrigeration lubricating oil inside the shell 400 from flowing into the suction pipe along the inner wall of the shell 400. On the other hand, this can reduce the refrigeration lubricating oil being sucked into the cylinder of the compressor during operation of the compressor.

[0064] In the embodiment, the minimum inner diameter of the third pipe segment 300 is greater than the minimum inner diameter of the first pipe segment 100, that is, the minimum inner diameter of the third pipe segment 300 is greater than the inner diameter of the first pipe segment 110, which can increase the effective flow area of the third pipe segment 300, is conducive to reducing the flow resistance of the refrigerant, increasing the flow of the refrigerant in the suction pipe, and thus improving the refrigeration performance of the compressor.

[0065] It should be noted that the inner diameter of the third pipe segment 300 is greater than the maximum inner diameter of the first transition segment 121, which can also reduce the flow resistance of the refrigerant, which will not be described here. For example Figure 6 As shown in the embodiment, the compressor further comprises a suction muffler 500, the suction muffler 500 is provided with a suction port 510, and the end of the third pipe segment 300 away from the second pipe segment 200 is directed towards the suction port 510, which can reduce the distance between the third pipe segment 300 and the suction port 510, thereby improving the suction efficiency of the compressor, reducing the suction overheating, improving the refrigerating capacity of the compressor, and improving the refrigeration performance of the compressor.

[0066] It should be noted that the wall thicknesses of the first pipe segment 100, the second pipe segment 200 and the third pipe segment 300 are equal and uniform, and the suction pipe can be produced by extrusion molding, which is convenient for processing and manufacturing the suction pipe.

[0067] For example Figure 6 As shown in the embodiment, the compressor further comprises a suction muffler 500, the suction muffler 500 is provided with a suction port 510, and the end of the third pipe segment 300 away from the second pipe segment 200 is directed towards the suction port 510, which can reduce the distance between the third pipe segment 300 and the suction port 510, thereby improving the suction efficiency of the compressor, reducing the suction overheating, improving the refrigerating capacity of the compressor, and improving the refrigeration performance of the compressor.

[0068] The third embodiment of the refrigeration equipment of the utility model discloses a compressor of the above-mentioned embodiment. Wherein, the refrigeration equipment can be refrigerator, refrigerator and the like.

[0069] Since the refrigeration equipment adopts all the technical solutions of the compressor of the above-mentioned embodiment, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiment, which will not be described here.

[0070] The above describes one embodiment of the utility model in combination with the drawings, but the utility model is not limited to the above-mentioned embodiment, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. An air intake duct, characterized in that The first pipe section comprises a first section and a second section connected to one end of the first section, the second section is connected to the second pipe section away from one end of the first section, and the inner diameter of the second section is greater than that of the first section. The second section is provided with a first transition section near one end of the first section, and the inner diameter of the first transition section gradually increases from the first pipe section to the second pipe section; and / or, The second section is provided with a second transition section near one end of the second pipe section, and the inner diameter of the second transition section gradually increases from the first pipe section to the second pipe section. The second pipe section is provided with a positioning surface near one end of the first pipe section, and the positioning surface is arranged perpendicularly to the axis of the first pipe section.

2. The suction tube according to claim 1, characterized in that: In the cross section passing through the axis of the first pipe section, part of the profile line of the welding surface is a straight line segment arranged obliquely to the axis of the first pipe section, or part of the profile line of the welding surface is an arc line segment concave toward the direction of the axis of the first pipe section.

3. The suction tube according to claim 2, characterized in that: The first pipe section comprises a first section and a second section connected to one end of the first section, the second section is connected to the second pipe section away from one end of the first section, and the inner diameter of the second section is greater than that of the first section. The second section is provided with a first transition section near one end of the first section, and the inner diameter of the first transition section gradually increases from the first pipe section to the second pipe section; and / or, 4. The suction tube of claim 1, wherein: The second section is provided with a second transition section near one end of the second pipe section, and the inner diameter of the second transition section gradually increases from the first pipe section to the second pipe section.

5. The suction tube of claim 1, wherein: The second pipe section is provided with a positioning surface near one end of the first pipe section, and the positioning surface is arranged perpendicularly to the axis of the first pipe section.

6. The suction tube of claim 1, wherein: In the cross section passing through the axis of the first pipe section, part of the profile line of the welding surface is a straight line segment arranged obliquely to the axis of the first pipe section, or part of the profile line of the welding surface is an arc line segment concave toward the direction of the axis of the first pipe section.

7. Compressor, characterized in that The first pipe section and the second pipe section are of an integral structure. The shell is provided with a through hole; The second pipe section extends into the through hole away from one end of the first pipe section, and at least part of the welding surface abuts against the outer edge of the through hole.

8. The compressor of claim 7, wherein: The suction pipe further comprises a third pipe section arranged at one end of the second pipe section away from the first pipe section, and the third pipe section protrudes from the inner wall of the shell away from one end of the second pipe section.

9. The compressor of claim 8, wherein: The minimum inner diameter of the third pipe section is greater than that of the first pipe section.

10. The compressor of claim 7, wherein: The outer surface of the shell is provided with a groove, the through hole is arranged on the bottom wall of the groove, and the bottom wall of the groove is arranged perpendicularly to the axis of the first pipe section.

11. A refrigeration appliance characterised in that: The compressor comprises any one of claims 7-10.

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