Compressor shell and compressor with same

Abstract

The utility model relates to a compressor shell and a compressor with the same. The compressor comprises a compressor shell and a rack. The compressor shell is cylindrical so that at least part of the rack can be contained in the compressor shell, a guide face and a fixing face which are arranged in the axial direction are arranged on the inner side of the compressor shell, the guide face is closer to the top end of the compressor shell than the fixing face, and the guide face is constructed to guide the rack to the fixing face in the process of installing the rack. The fixing face is configured to be in interference fit with the rack to fix the rack to the compressor shell, the fixing face is a cylindrical face, the guiding face is a cylindrical face, and the diameter of the guiding face is larger than that of the fixing face. According to the compressor shell provided by the invention, in the assembly process, the rack can be relatively easily inserted into the guide surface firstly and then pressed into the fixed surface, so that the rack is more easily aligned with the top end of the compressor shell, the product yield is further improved, and the time of the assembly process is shortened.

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, and more specifically to a compressor housing and a compressor having the housing. Background Technology

[0002] A compressor is a device that compresses low-pressure gas into high-pressure gas within a compression chamber formed by the compressor casing. Compressors are widely used in various applications, especially in refrigeration equipment such as air conditioners and refrigerators.

[0003] A compressor includes a compressor housing and a frame (also called a main frame) that is fixed to the compressor housing by an interference fit with the inner circumferential surface of the compressor housing. During assembly, the frame is first aligned with the top of the compressor housing, and then pressed into the compressor housing. Under the pressure of the inner circumferential surface of the compressor housing, the frame is reliably fixed to the compressor housing.

[0004] However, aligning the top of the frame with the top of the compressor housing is difficult, which reduces product yield (i.e., pressing the frame into the compressor housing without proper alignment will damage either the housing or the frame) and increases assembly time. Furthermore, the top of the compressor housing deforms to some extent during the pressing of the frame from its position into the housing, making it difficult to assemble the top cover onto the compressor housing in subsequent processes. Utility Model Content

[0005] In view of this, the present disclosure improves the compressor housing to solve the problems of difficulty in aligning the top of the frame with the top of the housing and difficulty in assembling the top cover onto the top of the housing.

[0006] In one aspect, this disclosure provides a compressor housing. The compressor includes a compressor housing and a frame. The compressor housing is cylindrical to house at least partially the frame therein. An axially arranged guide surface and a fixing surface are provided on the inner side of the compressor housing. The guide surface is closer to the top of the compressor housing than the fixing surface. The guide surface is configured to guide the frame to the fixing surface during installation into the frame. The fixing surface is configured to fix the frame to the compressor housing by an interference fit. The diameter of the fixing surface is smaller than the diameter of the guide surface.

[0007] According to the compressor housing provided in this disclosure, the guide surface has a larger diameter than the fixed surface. Therefore, during the assembly process, the frame can be inserted into the guide surface relatively easily first, and then pressed into the fixed surface. This makes it easier to align the top of the frame with the compressor housing, thereby improving product yield and reducing assembly time.

[0008] In one possible implementation, both the fixed surface and the guiding surface are cylindrical, with the diameter of the guiding surface being larger than the diameter of the fixed surface. Since the guiding surface is cylindrical, it can be machined in a single step, reducing the number of machining steps and lowering manufacturing difficulty.

[0009] In one possible implementation, a first tapering surface is provided between the guiding surface and the fixed surface, and the diameter of the first tapering surface gradually decreases as it approaches the fixed surface.

[0010] During the process of pressing the frame from the guide surface to the fixed surface, the frame gradually detaches from the guide surface; that is, the fit between the frame and the compressor housing gradually transitions from a clearance fit to an interference fit. This process requires applying a relatively large force to the frame (or the housing), making the pressing process relatively difficult and potentially damaging to the frame or housing. In this implementation, through the construction of the first tapered surface, the force applied to the frame (or the force applied to the housing) during the pressing process can be relatively small. This makes the pressing process easier and helps reduce the possibility of damaging the frame or housing.

[0011] In one possible implementation, a second tapering surface is provided between the top surface of the compressor housing and the guide surface, and the diameter of the second tapering surface gradually decreases as it approaches the guide surface.

[0012] Due to the presence of the second tapered surface, the top of the compressor housing has an opening larger than the diameter of the guide surface, through which the frame is inserted into the guide surface, making it easier to align the frame with the top of the compressor housing.

[0013] In one possible implementation, the first tapering surface has an angle α with the axis of the compressor housing, and the second tapering surface has an angle β with the axis of the compressor housing, wherein the angle α is smaller than the angle β.

[0014] Because the second tapered surface has a large angle with the axis of the compressor housing, the top of the compressor housing can obtain a large opening, which makes it relatively easy to insert the frame into the guide surface. Because the first tapered surface has a small angle with the axis of the compressor housing, the slope of the first tapered surface in the axial direction is large. This means that during the process of pressing the frame from the guide surface into the fixed surface, there is less resistance from the first tapered surface, and thus the force applied to the frame (or the force applied to the housing) can be relatively small.

[0015] In one possible implementation, the compressor housing has an axially arranged mating surface and an exposed surface on its outer side. The mating surface is closer to the top of the compressor housing than the exposed surface. The compressor also includes a top cover that covers the top of the compressor housing. The mating surface is configured to fit against the inner circumferential surface of the top cover, and the exposed surface is configured to be exposed outside the top cover. Both the mating surface and the exposed surface are cylindrical surfaces, and the diameter of the mating surface is smaller than the diameter of the exposed surface.

[0016] In this way, when the top cover is placed on top of the compressor housing, the inner circumferential surface of the top cover fits against the mating surface, while the outer circumferential surface of the top cover is flush with the exposed surface, thus enabling the compressor housing as a whole to have a consistent outer diameter in the axial direction.

[0017] In one possible implementation, an abutting surface is provided between the mating surface and the exposed surface. The abutting surface is constructed to abut against the bottom end surface of the top cover. The abutting surface has an angle γ with the axis of the compressor housing, and the angle γ satisfies: 80°≤γ≤100°.

[0018] The abutment surface with the aforementioned numerical range can provide support for the top cover of the compressor housing. When the top cover is placed on top of the compressor housing, the bottom end of the top cover can abut against the abutment surface, thereby supporting the compressor housing.

[0019] In one possible implementation, a first gradually expanding surface is provided between the abutting surface and the exposed surface, and the diameter of the first gradually expanding surface gradually increases as it approaches the exposed surface.

[0020] According to the above structure, when the top cover is placed on top of the compressor housing, there is a gap between the first expanding surface and the bottom end of the top cover. This gap provides space for the welding filler material during welding, ensuring that the compressor housing has a uniform outer diameter in the axial direction after welding.

[0021] In one possible implementation, a second gradually expanding surface is provided between the top surface of the compressor housing and the mating surface, and the diameter of the second gradually expanding surface gradually increases as it approaches the mating surface.

[0022] In this way, during the process of placing the top cover on top of the compressor housing, the inner circumferential surface of the top cover can smoothly pass through the second gradually expanding surface, avoiding jamming due to contact with right angles.

[0023] In one possible implementation, the fixed surface is a cylindrical surface, and the guiding surface is a conical surface whose diameter decreases as it approaches the fixed surface, and the minimum diameter of the conical surface is greater than or equal to the diameter of the fixed surface.

[0024] Because the guide surface has a larger diameter than the fixed surface, the frame can be inserted into the guide surface relatively easily first during assembly, and then pressed into the fixed surface. This makes alignment between the frame and the top of the compressor housing easier, thereby improving product yield and reducing assembly time. Furthermore, since the guide surface is cylindrical, it can be machined in a single step, reducing machining steps and manufacturing complexity.

[0025] In one possible implementation, the compressor housing includes a first cylindrical portion and a second cylindrical portion arranged axially, wherein the inner diameter and outer diameter of the first cylindrical portion are larger than the inner diameter and outer diameter of the second cylindrical portion, respectively, the guiding surface is the inner surface of the first cylindrical portion, and the mating surface is the inner surface of the second cylindrical portion.

[0026] Because the first and second cylindrical sections have similar shapes, the compressor housing can be formed by expanding it outwards in a direction perpendicular to the axis. This allows the compressor housing to be manufactured in a single forging process, thus reducing the number of machining steps and lowering manufacturing costs.

[0027] On the other hand, this disclosure provides a compressor. The compressor includes a compressor housing and a frame as described above, the frame being housed within the compressor housing and fixed to the compressor housing. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below.

[0029] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be considered as limiting the scope. Other related figures can be obtained by those skilled in the art based on these figures.

[0030] It should also be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0031] It should also be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0032] Figure 1 This is a schematic cross-sectional view of a compressor according to an embodiment of the present disclosure.

[0033] Figure 2 yes Figure 1 A schematic diagram of the compressor casing.

[0034] Figure 3 It is along Figure 2 A schematic cross-sectional view taken by line AA in the diagram.

[0035] Figure 4 yes Figure 2 A schematic partial view of the compressor housing.

[0036] Figure 5 yes Figure 1 A schematic partial view of the compressor housing and top cover.

[0037] Figure 6 yes Figure 1 A schematic diagram of the compressor frame structure.

[0038] Figure 7 It is along Figure 6 A schematic cross-sectional view taken from the BB line.

[0039] Figures 8A to 8C It shows Figure 1 The assembly process in which the compressor frame is inserted into the compressor housing.

[0040] Figure 9 This is a schematic diagram of the compressor housing according to another embodiment of the present disclosure.

[0041] Figure 10 This is a schematic diagram of the compressor housing according to another embodiment of the present disclosure. Detailed Implementation

[0042] The compressor and compressor housing provided in this disclosure will be illustrated below with reference to the accompanying drawings. It should be understood that there are various ways to implement this disclosure, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and complete understanding of this disclosure.

[0043] It should be understood that, in the embodiments shown in the accompanying drawings, the directional indications (such as up and down) used to explain the structure and movement of various elements in the embodiments of this disclosure are not absolute but relative. These descriptions are appropriate when these elements are in the positions or orientations shown in the drawings, or when these elements are in their usual placement or usage positions or orientations.

[0044] Figure 1 This is a schematic cross-sectional view of a compressor 10 according to an embodiment of the present disclosure.

[0045] See Figure 1 The compressor 10 may include a compressor housing 11, a top cover 12, and a bottom cover 13. The top cover 12 and the bottom cover 13 are respectively disposed on the upper and lower ends of the compressor housing 11 in the axial direction, to cooperate with the compressor housing 11 in defining a generally closed cavity (hereinafter referred to as the first cavity for convenience of description). In one example, the upper end of the compressor housing 11 may be inserted into the top cover 12. In one example, the bottom cover 13 may be inserted into the lower end of the compressor housing 11.

[0046] It should be noted that, in this disclosure, the term "axial" may refer to the direction of extension of the axis of the compressor 10 (or, the axis of the compressor housing 11).

[0047] See also Figure 1 The compressor 10 may further include a frame 14, a drive mechanism 15, and a compression mechanism 16 located in the first cavity. The frame 14 (or main frame 14) is fixed relative to the compressor housing 11. For example, the frame 14 may be fixed to the compressor housing 11 by an interference fit with the inner circumferential surface of the compressor housing 11. The drive mechanism 15 may include a stator 151, a rotor 152, and a drive shaft 153. In one example, the compressor 10 may be a scroll compressor, and the compression mechanism 16 may include a moving scroll 161 and a fixed scroll 162. The fixed scroll 162 is fixed to the frame 14. The drive shaft 153 is rotatably supported by the frame 14 (e.g., by a radial bearing) and is used to drive the moving scroll 161.

[0048] In one example, a cavity 121 (hereinafter referred to as the second cavity 121 for ease of description) may be provided in the interlayer of the top cover 12. The first cavity may be referred to as the low-pressure cavity, and the second cavity 121 may be referred to as the high-pressure cavity. When the compressor 10 is running, as, for example, the moving scroll plate 161 moves under the drive of the drive shaft 153, the fluid from the first cavity is compressed by the compression mechanism 16 and enters the second cavity 121, and is finally discharged through the discharge port (not shown).

[0049] Figure 2 This is a schematic diagram of the compressor housing 11. Figure 3 It is along Figure 2 A schematic cross-sectional view taken along line AA. See also Figure 2 and Figure 3 The compressor housing 11 may include a guide surface 111 and a fixing surface 112 in sequence along the axial direction from its top end. The guide surface 111 is closer to the top end of the compressor housing 11 than the fixing surface 112. During the installation of the frame 14, the guide surface 111 can guide the frame 14 to move from the guide surface 111 to the fixing surface 112. When the frame 14 is located in the fixing surface 112, the fixing surface 112 can fix the frame 14 to the compressor housing 11 by interference fit with the frame 14.

[0050] During the process of pressing the frame 14 from the guide surface 111 into the fixed surface 112, the frame 14 gradually detaches from the guide surface 111. That is, the fit between the frame 14 and the compressor housing 11 gradually transitions from a clearance fit to an interference fit. This process requires applying a relatively large force to the frame 14 (or a relatively large force to the compressor housing), making the pressing process relatively difficult and potentially damaging to the frame 14 or the compressor housing 11.

[0051] To avoid damage to the rack 14 or compressor housing 11 during installation, refer to Figure 2 and Figure 3 The guide surface 111 and the fixed surface 112 can both be cylindrical, and the inner diameter d1 of the guide surface 111 is larger than the inner diameter d2 of the fixed surface 112. Because the guide surface 111 has a larger diameter than the fixed surface 112, during assembly, the frame 14 can be relatively easily inserted into the guide surface 111 first, and then pressed into the fixed surface 112. This makes alignment between the frame 14 and the top of the compressor housing 11 easier, thereby improving product yield and reducing assembly time. Furthermore, since the guide surface 111 is cylindrical, its machining can be completed in a single process, reducing machining steps and manufacturing difficulty.

[0052] refer to Figure 3 and Figure 4 A first tapering surface 113 may be provided between the guide surface 111 and the fixed surface 112, and the diameter of the first tapering surface 113 gradually decreases as it approaches the fixed surface 112. In this implementation, due to the construction of the first tapering surface 113, the force applied to the frame 14 (or the force applied to the compressor housing 11) during the process of pressing the frame 14 from the guide surface 111 into the fixed surface 112 can be relatively small. This makes the pressing process relatively easy and helps to reduce the possibility of damaging the frame 14 or the compressor housing 11.

[0053] It should be understood that this disclosure does not impose any particular limitation on the form of the first tapering surface 113. For example, refer to... Figure 4 The first tapered surface 113 can be constructed as a curved surface. In other embodiments, the first tapered surface 113 can also be constructed as a conical surface, as long as the diameter of the first tapered surface 113 gradually decreases as it approaches the fixed surface 112.

[0054] Continue to refer to Figure 3 and Figure 4A second tapering surface 114 may be provided between the top surface of the compressor housing 11 and the guide surface 111, and the diameter of the second tapering surface 114 gradually decreases as it approaches the guide surface 111. Due to the presence of the second tapering surface 114, the top end of the compressor housing 11 has an opening larger than the diameter of the guide surface 111, through which the frame 14 is inserted into the guide surface 111, which makes it easier to align the frame 14 with the top end of the compressor housing 11.

[0055] refer to Figure 4 The first tapered surface 113 forms an angle α with the axis of the compressor housing 11, and the second tapered surface 114 forms an angle β with the axis of the compressor housing 11, where angle α is smaller than angle β. Because the second tapered surface 114 has a larger angle with the axis of the compressor housing 11, the top of the compressor housing 11 can obtain a larger opening, allowing the frame 14 to be inserted into the guide surface 111 relatively easily. Because the first tapered surface 113 has a smaller angle with the axis of the compressor housing 11, the slope of the first tapered surface 113 in the axial direction is larger. This results in less resistance from the first tapered surface 113 during the pressing of the frame 14 from the guide surface 111 into the fixing surface 112, thereby reducing the force applied to the frame 14 (or the force applied to the compressor housing).

[0056] refer to Figure 4 and Figure 5 The compressor housing 11 may have an axially arranged mating surface 115 and an exposed surface 116 on its outer side. The mating surface 115 is closer to the top of the compressor housing 11 than the exposed surface 116. The compressor 10 may also include a top cover 12 covering the top of the compressor housing 11. The mating surface 115 is configured to fit against the inner circumferential surface of the top cover 12, and the exposed surface 116 is configured to be exposed outside the top cover 12. Both the mating surface 115 and the exposed surface 116 are cylindrical surfaces, and the diameter of the mating surface 115 is smaller than the diameter of the exposed surface 116. In this way, when the top cover 12 is placed on the top of the compressor housing 11, the inner circumferential surface of the top cover 12 fits against the mating surface 115, while the outer circumferential surface of the top cover 12 is flush with the exposed surface 116. Thus, the compressor housing 11 as a whole can have a consistent outer diameter in the axial direction.

[0057] refer to Figure 5A contact surface 117 is provided between the mating surface 115 and the exposed surface 116. The contact surface 117 is configured to abut against the bottom end face of the top cover 12. The contact surface 117 forms an angle γ with the axis of the compressor housing 11, where the angle γ satisfies: 80°≤γ≤100°. The contact surface 117, having the above-mentioned numerical range, can provide support for the top cover 12 of the compressor housing 11. When the top cover 12 is placed at the top of the compressor housing 11, the bottom end of the top cover 12 can abut against the contact surface 117, thereby supporting the compressor housing 11.

[0058] Continue to refer to Figure 5 A first expanding surface 118 is provided between the abutting surface 117 and the exposed surface 116, and the diameter of the first expanding surface 118 gradually increases as it approaches the exposed surface 116. According to this configuration, when the top cover 12 is placed on top of the compressor housing 11, a gap exists between the first expanding surface 118 and the bottom end of the top cover 12. This gap provides space for welding filler material, so that after welding, the compressor housing 11 as a whole can have a uniform outer diameter in the axial direction.

[0059] refer to Figure 4 A second gradually expanding surface 119 is provided between the top surface of the compressor housing 11 and the mating surface 115, and the diameter of the second gradually expanding surface 119 gradually increases as it approaches the mating surface 115. In this way, when the top cover 12 is placed on the top of the compressor housing 11, the inner circumferential surface of the top cover 12 can pass smoothly through the second gradually expanding surface 119, avoiding jamming due to contact with right angles.

[0060] Figure 6 This is a structural schematic diagram of frame 14. Figure 7 It is along Figure 6 A schematic cross-sectional view taken along the CC line.

[0061] See Figure 6 and Figure 7 The frame 14 includes a hub 141 and a plurality of support arms 142, which are spaced apart on the outer periphery of the hub 141. In this example, the number of support arms 142 can be four. It is understood that in other embodiments, the number of support arms 142 can be other values, and this disclosure does not impose any particular limitation on this.

[0062] refer to Figure 7 Multiple support arms 142 define an outer diameter D. For example, the outer peripheral surfaces of the multiple support arms 142 can define a cylindrical surface, or the outer peripheral surfaces of the multiple support arms 142 can be a portion of that cylindrical surface; in this case, the outer diameter D can be the diameter of that cylindrical surface. The outer diameter D can be smaller than the inner diameter d1 and larger than the inner diameter d2. That is, the frame 14 has a clearance fit with the guide surface 111, while it has an interference fit with the fixed surface 112.

[0063] Figures 8A to 8C The assembly process of inserting the frame 14 into the compressor housing 11 is shown below. Figures 8A to 8C The process of mounting the frame 14 into the compressor housing 11 is illustrated by way of example.

[0064] See Figure 8A First, place the frame 14 on the upper side of the compressor housing 11 and align the multiple support arms 142 of the frame 14 with the guide surface 111 of the compressor housing 11.

[0065] See Figure 8A and Figure 8B Next, the frame 14 is moved downwards and inserted into the guide surface 111. During this process, the first tapered surface 113 can receive multiple support arms 142 to guide the frame 14. That is, during this process, multiple support arms 142 are placed in the first tapered surface 113 and slide downwards along the guide surface 111.

[0066] See Figure 8B and Figure 8C Next, as the frame 14 continues to move downward, it is pressed from the guide surface 111 into the fixing surface 112. Since the inner diameter d2 defined by the fixing surface 112 is smaller than the outer diameter D defined by the support arm 142 of the frame, the frame 14 is fixed to the compressor housing 11 by an interference fit with the inner circumferential surface of the fixing surface 112. This completes the assembly of the frame 14 and the compressor housing 11.

[0067] It should be noted that, in this disclosure, the inner diameter d2 can refer to the diameter of the fixing surface 112 before the frame 14 is installed into the compressor housing 11. Alternatively, the inner diameter d2 can refer to the diameter of the fixing surface 112 before it deforms due to the installation of the frame 14.

[0068] It should be understood that there are various ways to implement the compressor housing of this disclosure, and it should not be construed as being limited to the embodiments described above. The following, in conjunction with... Figures 9 to 10 Examples of variations of this disclosure will be provided for illustration.

[0069] Figure 9 This is a schematic diagram of the compressor housing 11a according to another embodiment of the present disclosure. It should be noted that the compressor housing 11a (and the compressor housing 11b in the following embodiments) is substantially the same as the compressor housing 11, and the compressor housing 11a (and the compressor housing 11b in the following embodiments) can be used in the compressor 10 to replace the compressor housing 11.

[0070] See Figure 9The compressor housing 11a has a guide surface 111a that is a conical surface with a decreasing diameter as it approaches the fixed surface 112a, and the minimum diameter d3 of this conical surface is greater than or equal to the diameter d4 of the fixed surface 112a. According to the compressor housing 11a provided in this disclosure, during assembly, the frame 14 can be relatively easily inserted into the guide surface 111a and pressed into the fixed surface 112a after passing through the portion with the minimum diameter, making alignment between the frame 14 and the top of the compressor housing 11a easier. Furthermore, machining the conical surface requires only one step, thus reducing the number of machining steps and lowering manufacturing difficulty.

[0071] Continue to refer to Figure 9 The outer surface of the compressor housing 11a can be a cylindrical surface. Since the presence of the guide surface 111a reduces the thickness of the compressor housing 11a, constructing the outer surface of the compressor housing 11a as a cylindrical surface can ensure the overall structural strength of the compressor housing 11a and prevent the compressor housing 11a from being damaged during the installation of the frame 14.

[0072] Figure 10 This is a schematic diagram of the compressor housing 11b according to yet another embodiment of the present disclosure. See also... Figure 10 In this embodiment, the compressor housing 10b includes a first cylindrical portion 113b and a second cylindrical portion 114b arranged axially. The inner diameter d5 of the first cylindrical portion 113b is larger than the inner diameter d6 of the second cylindrical portion 114b, and the outer diameter d7 of the first cylindrical portion 113b is larger than the outer diameter d8 of the second cylindrical portion 114b. The guide surface 111b is the inner surface of the first cylindrical portion 113b, and the fixing surface 112b is the inner surface of the second cylindrical portion 114b. Since the first cylindrical portion 113b and the second cylindrical portion 114b have similar shapes, the compressor housing 10b can be formed by outward expansion in a direction perpendicular to the axis. In this way, the compressor housing 10b can be manufactured in a single forging process, reducing the number of processing steps and lowering manufacturing costs.

[0073] It should be understood that there are various ways to form a guide surface on the compressor housing, and this disclosure does not specifically limit this method. For example, in one example, the guide surface can be formed on the compressor housing by material reduction (e.g., machining). In another example, the guide surface can be formed on the compressor housing by forging.

[0074] It should be understood that the term "comprising" and its variations as used in this disclosure are open-ended, meaning "including but not limited to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment".

[0075] It should be understood that, in the embodiments of this disclosure, unless otherwise expressly stated and limited, the terms "installation" or "assembly" should be interpreted broadly. For example, "installation" or "assembly" can refer to non-removable installation or assembly, or it can refer to detachable installation or assembly. Those skilled in the art can understand its specific meaning in this disclosure according to the specific circumstances.

[0076] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0077] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A compressor housing, said compressor comprising said compressor housing and a frame, characterized in that, The compressor housing is cylindrical to at least partially house the frame therein, an inner side of the compressor housing is provided with an axially arranged guide surface and a fixing surface, the guide surface is closer to a top end of the compressor housing than the fixing surface, the guide surface is configured to guide the frame to the fixing surface during assembly of the frame, and the fixing surface is configured to fix the frame to the compressor housing by interference fit with the frame, and a diameter of the fixing surface is smaller than a diameter of the guide surface.

2. The compressor housing of claim 1, wherein, The fixing surface is a cylindrical surface, the guide surface is a cylindrical surface, and the diameter of the guide surface is greater than the diameter of the fixing surface.

3. The compressor housing of claim 2, wherein, A first tapered surface is arranged between the guide surface and the fixing surface and interfaces therebetween, and a diameter of the first tapered surface gradually decreases as it approaches the fixing surface.

4. The compressor housing of claim 3, wherein, A second tapered surface is arranged between the top surface of the compressor housing and the guide surface and interfaces therebetween, and a diameter of the second tapered surface gradually decreases as it approaches the guide surface.

5. The compressor housing of claim 4, wherein, The first tapered surface has an included angle α with respect to an axis of the compressor housing, and the second tapered surface has an included angle β with respect to the axis of the compressor housing, and the included angle α is smaller than the included angle β.

6. The compressor housing of claim 3, wherein, An outer side of the compressor housing is provided with an axially arranged fitting surface and an exposed surface, the fitting surface is closer to a top end of the compressor housing than the exposed surface, the compressor further comprises a top cover arranged at the top end of the compressor housing, the fitting surface is configured to be in contact with an inner peripheral surface of the top cover, and the exposed surface is configured to be exposed outside the top cover, the fitting surface and the exposed surface are both cylindrical surfaces, and a diameter of the fitting surface is smaller than a diameter of the exposed surface.

7. The compressor housing of claim 6, wherein, A contact surface is further arranged between the fitting surface and the exposed surface, the contact surface is configured to abut against a bottom end surface of the top cover, the contact surface has an included angle γ with respect to an axis of the compressor housing, and the included angle γ satisfies: 80°≤γ≤100°.

8. The compressor housing of claim 7, wherein, A first diverging surface is arranged between the contact surface and the exposed surface and interfaces therebetween, and a diameter of the first diverging surface gradually increases as it approaches the exposed surface.

9. The compressor housing of claim 8, wherein, A second diverging surface is arranged between the top surface of the compressor housing and the fitting surface and interfaces therebetween, and a diameter of the second diverging surface gradually increases as it approaches the fitting surface.

10. The compressor housing of claim 1, wherein, The fixing surface is a cylindrical surface, the guide surface is a conical surface with a diameter that decreases as it approaches the fixing surface, and a minimum diameter of the conical surface is greater than or equal to a diameter of the fixing surface.

11. The compressor housing of claim 1, wherein, The compressor housing comprises a first cylindrical portion and a second cylindrical portion arranged axially, an inner diameter and an outer diameter of the first cylindrical portion are greater than an inner diameter and an outer diameter of the second cylindrical portion respectively, the guide surface is an inner surface of the first cylindrical portion, and the fixing surface is an inner surface of the second cylindrical portion.

12. A compressor characterized by, The compressor comprises: The compressor housing according to any one of claims 1 to 11; and The frame is housed in the compressor housing and fixed to the compressor housing.

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