Compressor and refrigerator

Abstract

The invention provides a compressor and a refrigerator, and belongs to the technical field of compressors, the compressor comprises a crankcase, a stator assembly and an assembly part, the stator assembly is located on one axial side of the crankcase, the assembly part is connected to the crankcase, the stator assembly is sleeved with the assembly part in the circumferential direction of the stator assembly, and the stator assembly is fixedly connected to the assembly part; the stator assembly is fixed to the crankcase through an assembly part. Under the function of preventing the stator assembly from deforming, the assembly part is used as a middle connecting part, and relative fixation of the stator assembly and the crankcase is achieved. Under the condition that the stator assembly has no mounting hole site, the redundant material area for placing the mounting hole site on the stator component can be saved, the size of the stator assembly can be reduced to a certain extent, the structure of the stator assembly is reduced, the space is saved, and miniaturization of the compressor is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular, to a compressor and a refrigerator. Background Art

[0002] In a reciprocating compressor, the stator and the crankcase are fixedly assembled by screws. Therefore, a plurality of mounting holes need to be provided on the stator for the screws to pass through.

[0003] When mounting holes are provided on the stator, it will cause an increase in the spatial structure of the stator and the occupied space of the stator in the compressor, thereby affecting the structure of the compressor. Moreover, the increase in the spatial structure of the stator will also lead to an increase in the material usage cost. Summary of the Invention

[0004] The present invention aims to solve the problem that when mounting holes are provided on the stator in the prior art or related art, the spatial structure of the stator will increase.

[0005] In view of this, in a first aspect, the present invention provides a compressor, including: a crankcase; a stator assembly located on an axial side of the crankcase; a fitting connected to the crankcase, the fitting being sleeved around the stator assembly in the circumferential direction of the stator assembly, and the stator assembly being fixedly connected to the fitting, and the stator assembly being fixed to the crankcase through the fitting.

[0006] A part of the crankshaft in the compressor can extend into the crankcase. The crankcase can support and protect the crankshaft, ensuring that the crankshaft can rotate stably and protecting the crankshaft from external factors. The stator assembly can drive the crankshaft to rotate. After fixing the relative positions of the stator assembly and the crankcase, it is ensured that the stator assembly can stably drive the crankshaft to rotate.

[0007] A fitting is sleeved around the outer periphery of the stator assembly, and the fitting is distributed in the circumferential direction of the stator assembly. During the assembly process of the compressor, there is a risk of deformation of the stator assembly, thus causing a certain degree of difficulty in the assembly of the compressor. In this solution, the fitting is used to sleeve the stator assembly, which can prevent the problem of deformation of the stator assembly during the installation process, and thus facilitate the installation of the compressor.

[0008] The assembly is also connected to the crankcase, and there is a fixed connection between the stator assembly and the assembly. When the relative positions of the assembly and the crankcase are fixed, the relative positions of the stator assembly and the crankcase are also fixed. In the related art, in the solution of directly locking the stator assembly to the crankcase, mounting holes need to be provided on the stator assembly. Therefore, it is necessary to increase the structure of the stator assembly to avoid the locking components affecting the core components inside the stator assembly. In this solution, the assembly and the crankcase are used for fixation, so there is no need to use locking components to lock the stator assembly to the crankcase, and thus there is no need to provide mounting holes on the stator assembly. In this solution, the assembly that prevents the deformation of the stator assembly is fully utilized. Under the function of preventing the deformation of the stator assembly, the assembly is used as an intermediate connecting component to realize the relative fixation of the stator assembly and the crankcase. Therefore, there is no need for a separate fixing structure to install the stator assembly, which not only realizes the diversification of the functions of the assembly but also reduces the use of components.

[0009] When there are no mounting holes on the stator assembly, the redundant material area on the stator component for placing the mounting holes can be saved, which can reduce the volume of the stator assembly to a certain extent, shrink the structure of the stator assembly, save space, and thus is beneficial to the miniaturization of the compressor. Moreover, removing the redundant mounting area can also reduce the material cost of the stator assembly.

[0010] In some technical solutions, optionally, along the circumferential direction of the assembly, the assembly is provided with a plurality of hollow holes, and the hollow holes penetrate the assembly along the thickness direction of the assembly, and the opening directions of the hollow holes face the stator assembly.

[0011] A plurality of hollow holes are formed on the assembly by machining. The plurality of hollow holes are distributed along the circumferential direction of the assembly, and the hollow holes penetrate the assembly along the thickness direction of the assembly. Exemplarily, the hollow holes are opened along the radial direction of the stator assembly, or the opening directions of the hollow holes form an angle with the radial direction of the stator assembly.

[0012] The opening directions of the hollow holes face the stator assembly. Therefore, the positions of the hollow holes provided in the assembly do not come into contact with the stator assembly, which can reduce the contact area between the assembly and the stator assembly. It should be noted that in order to enable the assembly to stably prevent the stator assembly from deforming, the assembly needs to have a sufficient axial dimension. When there is a need to reduce the contact area between the assembly and the stator assembly, the above requirement cannot be simply achieved by reducing the axial dimension of the assembly. Therefore, in this solution, the above requirement is achieved by providing hollow holes on the assembly.

[0013] During the operation of the compressor, the stator assembly will vibrate. By reducing the contact area between the assembly and the stator assembly, the radial noise of the stator assembly can be reduced, thereby reducing the decibel level during the operation of the compressor.

[0014] In some technical solutions, optionally, along the axial direction of the stator assembly, the length of the stator assembly is greater than the length of the fitting, and both axial ends of the stator assembly protrude from the fitting.

[0015] When the axial length of the fitting is too large, the contact area between the fitting and the stator assembly is too large, resulting in a large amount of noise generated during the operation of the compressor.

[0016] In this solution, the axial length of the fitting is less than the axial length of the stator assembly, and both axial ends of the stator assembly protrude from the fitting. The fitting is disposed in the middle along the axial direction of the stator assembly. The stator assembly can be supported more stably, and the noise of the stator assembly is also avoided from increasing due to the offset of the fitting.

[0017] In some technical solutions, optionally, the fitting includes: an annular kit sleeved on the stator assembly; a notch is provided along the circumferential direction of the annular kit, and the notch penetrates the annular kit along the axial and radial directions of the stator assembly; a first plate member connected to the annular kit; a second plate member connected to the annular kit, and the first plate member and the second plate member are located on both sides of the notch along the circumferential direction of the annular kit; and a connecting member connecting the first plate member and the second plate member.

[0018] A notch is provided along the circumferential direction of the annular kit. Therefore, the annular kit is not a complete annular structure. A first plate member and a second plate member are provided on the annular kit, and the first plate member and the second plate member are arranged on both sides of the notch. When the connecting member is used to connect the first plate member and the second plate member, as the connecting member is tightened, the connecting member pulls the first plate member and the second plate member closer to each other, thereby narrowing the width of the notch. The annular kit can be tightly sleeved on the stator assembly, so that the annular kit can be stably hoop-mounted on the outer periphery of the stator assembly, avoiding the problem of deformation of the stator assembly during the assembly process of the compressor.

[0019] In some technical solutions, optionally, the fitting is a closed ring, and the fitting is fixed to the stator assembly by hot shrinking or cold pressing.

[0020] In some technical solutions, optionally, a plurality of supporting feet are provided on one side of the crankcase facing the stator assembly, and the plurality of supporting feet are spaced apart along the circumferential direction of the stator assembly. The stator assembly has an axis, and the side of the supporting feet facing the axis is attached to the outer periphery of the fitting.

[0021] An exemplary illustration is made with the first side of the crankcase facing the stator assembly. Multiple feet are provided on the first side of the crankcase. In the circumferential direction of the stator assembly, the multiple feet are spaced apart. The internal space enclosed by the multiple feet is set as the installation space. When installing the fitting, a part of the fitting extends into the installation space, and the outer periphery of the fitting fits against the inner side of the feet. The feet can play a role in positioning the fitting. When the fitting extends into the installation space, the installation and positioning of the fitting are achieved, avoiding the fitting from deviating from the installation position, thus facilitating the installation of the fitting. Moreover, the multiple feet can also limit the fitting from moving axially, thereby ensuring the installation stability of the fitting.

[0022] In some technical solutions, optionally, the multiple feet are in interference fit with the fitting; or the fitting is welded and fixed to the feet.

[0023] The fitting can be assembled into the installation space by means of interference fit, that is, the fitting closely fits against the inner side of the feet. When the fitting is inserted into the installation space, the installation of the fitting is achieved, and there is no need to use additional structures to fix the fitting, which can not only simplify the internal structure of the compressor but also improve the installation stability of the fitting.

[0024] Or, when the fitting is inserted into the installation space, the fitting and the feet are welded, so as to ensure that the fitting can be stably connected to the feet, guarantee the installation stability of the fitting, and further ensure that the relative position between the stator assembly and the crankcase is not likely to change.

[0025] In some technical solutions, optionally, the feet include a first support portion and a second support portion. The first support portion and the second support portion are connected, and the first support portion and the second support portion are distributed along the axial direction of the stator assembly. The side of the first support portion facing the axis fits against the outer periphery of the fitting, and the side of the second support portion facing the axis fits against the stator assembly.

[0026] A part of the stator assembly extends out of the fitting, and the part of the stator assembly extending out of the fitting fits against the feet.

[0027] Specifically, the feet in this solution include a first support portion and a second support portion. The fitting fits against the inner side of the first support portion, and the stator assembly fits against the inner side of the second support portion. Since the radial dimension of the stator assembly is smaller than that of the fitting, in order to enable the stator assembly to fit against the second support portion, the first support portion and the second support portion need to be set as a stepped structure, and the minimum radial dimension of the second support portion is smaller than the minimum radial dimension of the first support portion, so that the stator assembly can fit against the inner side of the second support portion.

[0028] The second support part can support the stator assembly, thereby preventing the stator assembly from shaking relative to the crankcase, further improving the installation stability of the stator assembly and the fitting, and also ensuring that the relative position between the stator assembly and the crankcase is not likely to change.

[0029] In some technical solutions, optionally, the second support part is in interference fit with the stator assembly; or the stator assembly is fixedly welded to the second support part.

[0030] The stator assembly can be assembled into the installation space by interference fit, that is, the stator assembly closely fits on the inner side of the second support part. When the stator assembly is inserted into the installation space, the second support part stably positions the stator assembly, improving the installation stability of the stator assembly.

[0031] Alternatively, when the stator assembly is inserted into the installation space, the stator assembly and the support feet are welded, thereby further connecting the stator assembly to the crankcase and further improving the installation stability of the stator assembly.

[0032] In some technical solutions, optionally, the fitting is in interference fit with the stator assembly; or the fitting is in transitional fit with the stator assembly, and the fitting is fixedly welded to the stator assembly.

[0033] The stator assembly can be inserted into the fitting by interference fit. At this time, no additional components are required to lock the stator assembly and the fitting, thereby reducing the use of parts. The interference fit method can also ensure that the stator assembly is stably installed in the fitting.

[0034] Or, after the stator assembly is inserted into the fitting, the stator assembly and the fitting are connected by welding to further improve the connection stability between the stator assembly and the fitting.

[0035] In a second aspect, the present invention provides a refrigerator, including the compressor in the first aspect.

[0036] The additional aspects and advantages of the present invention will become apparent in the following description section, or will be understood through the practice of the present invention. Description of the Drawings

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 Shows a partial structural schematic diagram of the compressor in the embodiment of the present invention; Figure 2 Shows a structural schematic diagram of the fitting in the embodiment of the present invention; Figure 3 Shows a structural schematic diagram of the fitting in the embodiment of the present invention; Figure 4 The structural schematic diagrams of the stator assembly, the fitting and the feet in an embodiment of the present invention are shown. Reference numerals: 100 Compressor, 110 Crankcase, 111 Feet, 112 Housing, 113 First support portion, 114 Second support portion, 120 Stator assembly, 130 Fitting, 131 Hollow hole, 132 Ring kit, 133 Notch, 134 First plate member, 135 Second plate member, 136 Connecting member, 137 Limiting member. Detailed implementation manners

[0038] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0039] Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0040] Next, refer to Figures 1 to 4 to describe a compressor and a refrigerator provided according to some embodiments of the present invention.

[0041] Combined with Figure 1 and Figure 2 As shown, in some embodiments of the present invention, a compressor 100 is provided. The compressor 100 includes: a crankcase 110, a stator assembly 120, and a fitting 130. The stator assembly 120 is located on one side of the axial direction ( Figure 1 the arrow direction at H therein) of the crankcase 110. The fitting 130 is connected to the crankcase 110 and is sleeved on the stator assembly 120 along the circumferential direction ( Figure 1 the arrow direction at C therein) of the stator assembly 120. The stator assembly 120 is fixedly connected to the fitting 130, and the stator assembly 120 is fixed to the crankcase 110 through the fitting 130.

[0042] A part of the crankshaft in the compressor 100 can extend into the crankcase 110. The crankcase 110 can support and protect the crankshaft, ensuring that the crankshaft can rotate stably and protecting the crankshaft from external factors. The stator assembly 120 can drive the crankshaft to rotate. After fixing the relative positions of the stator assembly 120 and the crankcase 110, it is ensured that the stator assembly 120 can stably drive the crankshaft to rotate.

[0043] An assembly 130 is sleeved on the outer periphery of the stator assembly 120, and the assembly 130 is circumferentially distributed along the stator assembly 120. During the assembly process of the compressor 100, the stator assembly 120 has a risk of deformation, which causes certain difficulties for the assembly of the compressor 100. In this solution, the assembly 130 is used to sleeve the stator assembly 120, so as to prevent the stator assembly 120 from deforming during the installation process, and thus facilitate the installation of the compressor 100.

[0044] The assembly 130 is also connected to the crankcase 110, and the stator assembly 120 and the assembly 130 are fixedly connected. When the relative position between the assembly 130 and the crankcase 110 is fixed, the relative position between the stator assembly 120 and the crankcase 110 is also fixed. In the related art, in the solution of directly locking the stator assembly 120 to the crankcase 110, mounting holes need to be provided on the stator assembly 120, so the structure of the stator assembly 120 needs to be increased to avoid the locking components affecting the core components inside the stator assembly 120. In this solution, the assembly 130 is used to fix to the crankcase 110, so there is no need to use locking components to lock the stator assembly 120 to the crankcase 110, and thus there is no need to provide mounting holes on the stator assembly 120. In this solution, the assembly 130 that prevents the stator assembly 120 from deforming is fully utilized. Under the function of preventing the stator assembly 120 from deforming, the assembly 130 is used as an intermediate connecting component to realize the relative fixation of the stator assembly 120 and the crankcase 110. Therefore, there is no need for a separate fixing structure to install the stator assembly 120, which not only realizes the diversification of the functions of the assembly 130, but also reduces the use of parts.

[0045] When there are no mounting holes on the stator assembly 120, the redundant material area for placing the mounting holes on the stator part can be saved, the volume of the stator assembly 120 can be reduced to a certain extent, the structure of the stator assembly 120 can be shrunk, and space can be saved, which is conducive to the miniaturization of the compressor 100. Moreover, removing the redundant mounting area can also reduce the material cost of the stator assembly 120.

[0046] In this embodiment, the outer diameter of the stator assembly 120 is a regular circle, and there are no screw mounting holes on the stator assembly 120.

[0047] Combined Figure 1 and Figure 2 As shown, in some embodiments, optionally, along the circumference of the assembly 130 ( Figure 1 the arrow direction at C in Figure 2 ), the assembly 130 is provided with a plurality of hollow holes 131, and the hollow holes 131 penetrate the assembly 130 along the thickness direction of the assembly 130 ( Figure 2 the arrow direction at W in Figure 2 ), and the opening direction of the hollow holes 131 ( Figure 2The arrow at D points (towards the stator assembly 120).

[0048] A plurality of hollow holes 131 are formed on the fitting 130. The plurality of hollow holes 131 are circumferentially distributed along the fitting 130. The hollow holes 131 penetrate the fitting 130 in the thickness direction of the fitting 130. Exemplarily, the hollow holes 131 are opened in the radial direction of the stator assembly 120, or the opening direction of the hollow holes 131 forms an angle with the radial direction of the stator assembly 120.

[0049] The opening direction of the hollow holes 131 faces the stator assembly 120. Therefore, the position of the fitting 130 where the hollow holes 131 are provided does not contact the stator assembly 120, which can reduce the contact area between the fitting 130 and the stator assembly 120. It should be noted that in order to enable the fitting 130 to stably prevent the stator assembly 120 from deforming, the fitting 130 needs to have a sufficient axial dimension. When there is a need to reduce the contact area between the fitting 130 and the stator assembly 120, the above requirement cannot be simply achieved by reducing the axial dimension of the fitting 130. Therefore, in this solution, the above requirement is achieved by opening the hollow holes 131 on the fitting 130.

[0050] During the operation of the compressor 100, the stator assembly 120 will vibrate. By reducing the contact area between the fitting 130 and the stator assembly 120, the radial noise of the stator assembly 120 can be reduced, thereby reducing the decibels during the operation of the compressor 100.

[0051] Combined Figure 1 and Figure 2 As shown, in some embodiments, optionally, along the axial direction of the stator assembly 120 ( Figure 1 the arrow at H in the figure points), the length of the stator assembly 120 is greater than the length of the fitting 130, and both axial ends of the stator assembly 120 extend out of the fitting 130.

[0052] When the axial length of the fitting 130 is too large, the contact area between the fitting 130 and the stator assembly 120 is too large, resulting in a large amount of noise generated during the operation of the compressor 100.

[0053] In this solution, the axial length of the fitting 130 is less than the axial length of the stator assembly 120, and both axial ends of the stator assembly 120 extend out of the fitting 130. In the axial direction of the stator assembly 120, the fitting 130 is centered, and the stator assembly 120 can be more stably supported, and the noise of the stator assembly 120 is also avoided from increasing due to the offset of the fitting 130.

[0054] In addition, extending the end of the stator assembly 120 out of the fitting 130 also facilitates the installation of other components at the axial end of the stator assembly 120.

[0055] Combined Figure 1 、 Figure 2 and Figure 3 As shown, in some embodiments, optionally, the fitting 130 includes: an annular kit 132, a first plate 134, a second plate 135, and a connecting member 136. The annular kit 132 is sleeved on the stator assembly 120. Along the circumferential direction of the annular kit 132, a notch 133 is provided on the annular kit 132. The notch 133 penetrates through the annular kit 132 along the axial and radial directions of the stator assembly 120 ( Figure 2 as indicated by the arrow at R in the figure, the radial direction of the fitting 130 is the same as the radial direction of the stator assembly 120). Both the first plate 134 and the second plate 135 are connected to the annular kit 132. Along the circumferential direction of the annular kit 132, the first plate 134 and the second plate 135 are located on both sides of the notch 133, and the connecting member 136 connects the first plate 134 and the second plate 135.

[0056] A notch 133 is provided in the circumferential direction of the annular kit 132, so the annular kit 132 is not a complete annular structure. A first plate 134 and a second plate 135 are provided on the annular kit 132, and the first plate 134 and the second plate 135 are arranged on both sides of the notch 133. When the connecting member 136 is used to connect the first plate 134 and the second plate 135, as the connecting member 136 is tightened, the connecting member 136 pulls the first plate 134 and the second plate 135 closer to each other, thereby reducing the width of the notch 133. The annular kit 132 can be tightly sleeved on the stator assembly 120, so that the annular kit 132 can be stably clamped on the outer periphery of the stator assembly 120, avoiding the problem of deformation of the stator assembly 120 during the assembly process of the compressor 100.

[0057] The fitting 130 in this embodiment can be a clamp. The clamp is a circular structure with a notch 133. There are two parallel plates outside the notch 133, and screw holes are provided on the plates. The connecting member 136 is a bolt, and the bolt is tightened to fix the clamp and the stator assembly 120.

[0058] In a possible embodiment, the fitting 130 further includes a limiting member 137. The limiting member 137 is sleeved on the connecting member 136, and the limiting member 137 is located between the first plate member 134 and the second plate member 135. When the connecting member 136 pulls the first plate member 134 and the second plate member 135 closer to each other, if the first plate member 134 and the second plate member 135 are too close, the annular kit 132 may damage the stator assembly 120. If the first plate member 134 and the second plate member 135 are not pulled in place, the annular kit 132 cannot effectively prevent the stator assembly 120 from deforming. In this solution, by arranging the limiting member 137 between the first plate member 134 and the second plate member 135, when installing the fitting 130, there is no need to worry about damaging the stator assembly 120. When both the first plate member 134 and the second plate member 135 contact the limiting member 137, it means that the first plate member 134 and the second plate member 135 have been pulled in place, which can not only ensure that the annular kit 132 effectively prevents the stator assembly 120 from deforming, but also avoid damaging the stator assembly 120.

[0059] The limiting member 137 can prevent the first plate member 134 and the second plate member 135 from being too close, thereby preventing the annular kit 132 from crushing the stator assembly 120.

[0060] In some technical solutions, optionally, the fitting 130 is a closed ring, and the fitting 130 is fixed to the stator assembly 120 by hot shrinking or cold pressing.

[0061] The fitting 130 is a closed ring structure, that is, in the circumferential direction of the fitting 130, the fitting 130 does not have an opening structure, so that the fitting 130 can be completely sleeved on the stator assembly 120 along the circumferential direction, which can ensure the fixing stability of the stator assembly 120.

[0062] The stator assembly 120 and the fitting 130 are press-fitted by hot shrinking or cold pressing.

[0063] Combined Figure 1 and Figure 2 As shown in, in some embodiments, optionally, the side of the crankcase 110 facing the stator assembly 120 is provided with a plurality of feet 111. The plurality of feet 111 are circumferentially spaced apart along the stator assembly 120. The stator assembly 120 has an axis A, and the side of the feet 111 facing the axis A is in contact with the outer periphery of the fitting 130.

[0064] An exemplary illustration is made with the first side of the crankcase 110 facing the stator assembly 120. A plurality of feet 111 are provided on the first side of the crankcase 110. In the circumferential direction of the stator assembly 120, the plurality of feet 111 are spaced apart. The internal space enclosed by the plurality of feet 111 is set as the installation space. When installing the fitting 130, a part of the fitting 130 extends into the installation space, and the outer periphery of the fitting 130 fits against the inward side of the feet 111. The feet 111 can play a role in positioning the fitting 130. When the fitting 130 extends into the installation space, the installation and positioning of the fitting 130 are achieved, avoiding the fitting 130 deviating from the installation position, thus facilitating the installation of the fitting 130. Moreover, the plurality of feet 111 can also limit the fitting 130 from moving axially, thereby ensuring the installation stability of the fitting 130.

[0065] The crankcase 110 further includes a housing 112, and the feet 111 are provided on the housing 112.

[0066] In some embodiments, optionally, the plurality of feet 111 are in interference fit with the fitting 130; or the fitting 130 is fixed to the feet 111 by welding.

[0067] The fitting 130 can be assembled into the installation space by an interference fit method, that is, the fitting 130 closely fits against the inner side of the feet 111. When the fitting 130 is inserted into the installation space, the installation of the fitting 130 is achieved, and there is no need to use an additional structure to fix the fitting 130, which can not only simplify the internal structure of the compressor 100 but also improve the installation stability of the fitting 130.

[0068] In this embodiment, the fitting 130 and the crankcase 110 are assembled and fixed by a multi-point interference fit method.

[0069] Alternatively, when the fitting 130 is inserted into the installation space, the fitting 130 and the feet 111 are welded, so as to ensure that the fitting 130 can be stably connected to the feet 111, guarantee the installation stability of the fitting 130, and further ensure that the relative position of the stator assembly 120 and the crankcase 110 is not likely to change.

[0070] The fitting 130 is made of a weldable metal material, such as a steel plate, and the fitting 130 and the crankcase 110 are fixedly connected by a metal welding method.

[0071] Combined with Figure 1 、 Figure 2 and Figure 4As shown, in some embodiments, optionally, the foot 111 includes a first support portion 113 and a second support portion 114. The first support portion 113 and the second support portion 114 are connected, and the first support portion 113 and the second support portion 114 are distributed along the axial direction of the stator assembly 120. The side of the first support portion 113 facing the axis A fits against the outer periphery of the fitting 130, and the side of the second support portion 114 facing the axis A fits against the stator assembly 120.

[0072] A part of the stator assembly 120 extends out of the fitting 130, and the part of the stator assembly 120 that extends out of the fitting 130 fits against the foot 111.

[0073] Specifically, the foot 111 in this solution includes a first support portion 113 and a second support portion 114. The fitting 130 fits against the inner side of the first support portion 113, and the stator assembly 120 fits against the inner side of the second support portion 114. Since the radial dimension of the stator assembly 120 is smaller than the radial dimension of the fitting 130, in order to enable the stator assembly 120 to fit against the second support portion 114, the first support portion 113 and the second support portion 114 need to be set as a stepped structure, and the minimum radial dimension of the second support portion 114 is smaller than the minimum radial dimension of the first support portion 113, so that the stator assembly 120 can fit against the inner side of the second support portion 114.

[0074] The second support portion 114 can support the stator assembly 120, thereby preventing the stator assembly 120 from shaking relative to the crankcase 110, further improving the installation stability of the stator assembly 120 and the fitting 130, and also ensuring that the relative position between the stator assembly 120 and the crankcase 110 is not likely to change.

[0075] In some embodiments, optionally, the second support portion 114 is in interference fit with the stator assembly 120; or the stator assembly 120 is welded and fixed to the second support portion 114.

[0076] The stator assembly 120 can be assembled into the installation space by an interference fit method, that is, the stator assembly 120 closely fits against the inner side of the second support portion 114. When the stator assembly 120 is inserted into the installation space, the second support portion 114 stably positions the stator assembly 120, improving the installation stability of the stator assembly 120.

[0077] Or, when the stator assembly 120 is inserted into the installation space, the stator assembly 120 and the foot 111 are welded, thereby further connecting the stator assembly 120 to the crankcase 110 and further improving the installation stability of the stator assembly 120.

[0078] In a possible embodiment, along the axial direction of the stator assembly 120, the length of the support leg 111 is L1, the length of the fitting 130 is L2, and the length of the contact position between the fitting 130 and the support leg 111 is L3, where L3 < 0.5×L1 and L3 < 0.5×L1.

[0079] In the case where the fitting 130 and the support leg 111 are assembled by interference fit, if the length of the contact position between the fitting 130 and the support leg 111 is too long, it will cause excessive deformation of the support leg 111, thus easily resulting in the breakage or bending of the support leg 111. Also, if the length of the contact position between the fitting 130 and the support leg 111 is too long, it will also make the installation of the fitting 130 more difficult. In this solution, it is defined that L3 < 0.5×L1 and L3 < 0.5×L1. Within the above range, it is possible to reduce the installation difficulty of the fitting 130 and avoid damage to the support leg 111, ensuring that the support leg 111 can be stably connected to the fitting 130.

[0080] In some embodiments, optionally, the fitting 130 is in interference fit with the stator assembly 120; or the fitting 130 is in transitional fit with the stator assembly 120, and the fitting 130 is welded and fixed to the stator assembly 120.

[0081] The stator assembly 120 can be inserted into the fitting 130 by interference fit. At this time, no additional components are required to lock the stator assembly 120 and the assembly, thus reducing the use of parts. The interference fit method can also ensure that the stator assembly 120 is stably installed in the fitting 130.

[0082] Alternatively, after the stator assembly 120 is inserted into the fitting 130, welding is used to connect the stator assembly 120 and the fitting 130, further improving the connection stability between the stator assembly 120 and the fitting 130.

[0083] The stator assembly 120 and the fitting 130 are installed by transitional fit, and at the same time, local spot or linear welding is used for strengthening and fixing.

[0084] In the above embodiments, the present invention discloses a circular stator assembly of a non-installation-hole outer sleeve clamp applied to a reciprocating refrigerator compressor. There are no installation holes on the stator assembly 120, and it is fixed by an outer metal clamp (fitting 130). The fitting 130 and the crankcase 110 are fixedly assembled by interference fit or welding fit.

[0085] A reciprocating piston compressor uses the above-mentioned stator assembly 120. Without mounting holes, the redundant material area on the stator assembly 120 for placing the mounting holes can be saved, which can reduce the volume of the stator assembly 120 to a certain extent, shrink the structure of the stator assembly 120, and saving space is beneficial to the miniaturization of the compressor 100. Moreover, removing the redundant mounting area can also reduce the material cost of the stator assembly 120. The stator assembly 120 and the feet 111 of the crankcase 110 can be fixed by interference fit or welding, and the clamp structure can also prevent deformation during the installation of the stator components, which has high practical value.

[0086] In an embodiment of the present invention, a refrigerator is proposed, which includes the compressor 100 in any of the above embodiments and can achieve the same technical effects, which will not be elaborated here.

[0087] The stator assembly 120 and the feet 111 of the crankcase 110 are fixed by interference fit or welding. This design not only reduces the spatial structure of the stator components but also avoids material waste, reduces the material cost, and expands the internal spatial structure of the compressor 100. In this way, the structure of the compressor 100 can be designed to be more compact, which can indirectly increase the volume ratio of the refrigerator and better meet the current requirements of the compressor 100 for low cost, miniaturization and high volume of the refrigerator, and has high practical value.

[0088] In the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "mounting", "connecting", "coupling", "fixing" and the like should be understood in a broad sense. For example, "connecting" can be a fixed connection, a detachable connection, or an integral connection; "coupling" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0090] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A compressor, characterized in that, Comprising: A crankcase; A stator assembly located axially on one side of the crankcase; A fitting connected to the crankcase. Circumferentially along the stator assembly, the fitting is sleeved on the stator assembly, and the stator assembly is fixedly connected to the fitting. The stator assembly is fixed to the crankcase through the fitting.

2. The compressor according to claim 1, characterized in that, Circumferentially along the fitting, the fitting is provided with a plurality of hollow holes which penetrate the fitting in the thickness direction of the fitting, and the opening directions of the hollow holes face the stator assembly.

3. The compressor according to claim 1, characterized in that, Axially along the stator assembly, the length of the stator assembly is greater than the length of the fitting, and both axial ends of the stator assembly extend out of the fitting.

4. The compressor according to any one of claims 1 to 3, characterized in that The fitting comprises: An annular kit sleeved on the stator assembly. Circumferentially along the annular kit, the annular kit is provided with a notch which penetrates the annular kit axially and radially along the stator assembly; A first plate member connected to the annular kit; A second plate member connected to the annular kit. Circumferentially along the annular kit, the first plate member and the second plate member are located on both sides of the notch; A connecting member connecting the first plate member and the second plate member.

5. The compressor according to any one of claims 1 to 3, characterized in that, The fitting is a closed ring, and the fitting is fixed to the stator assembly by hot shrinking or cold pressing.

6. The compressor according to any one of claims 1 to 3, characterized in that, On one side of the crankcase facing the stator assembly, there are a plurality of supporting feet which are circumferentially spaced along the stator assembly. The stator assembly has an axis, and the side of the supporting feet facing the axis is in contact with the outer periphery of the fitting.

7. The compressor according to claim 6, wherein, The plurality of supporting feet are in interference fit with the fitting; or The fitting is welded and fixed to the supporting feet.

8. The compressor according to claim 6, wherein The supporting feet comprise a first supporting portion and a second supporting portion which are connected. The first supporting portion and the second supporting portion are axially distributed along the stator assembly. The side of the first supporting portion facing the axis is in contact with the outer periphery of the fitting, and the side of the second supporting portion facing the axis is in contact with the stator assembly.

9. The compressor according to claim 8, wherein, The second supporting portion is in interference fit with the stator assembly; or The stator assembly is welded and fixed to the second supporting portion.

10. The compressor according to any one of claims 1 to 3, characterized in that, The fitting is in interference fit with the stator assembly; or The fitting is in transitional fit with the stator assembly, and the fitting is welded and fixed to the stator assembly.

11. A refrigerator, characterized in that, Comprising: A compressor according to any one of claims 1 to 10.

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