Air cylinder for compressor and rolling rotor type compressor

Abstract

The utility model provides an air cylinder for a compressor and a rolling rotor type compressor, and the air cylinder comprises an air cylinder body, the protruding part protrudes out of the peripheral face of the air cylinder body, a blade groove is formed in the protruding part, the blade groove extends towards the air cylinder body until the blade groove communicates with the air cylinder cavity, and the face, away from the air cylinder body, of the protruding part is an arc face; the ratio of the arc length of the cambered surface to the diameter corresponding to the cambered surface is not smaller than 0.7, and the ratio of the arc length of the protruding part on the peripheral face of the air cylinder body to the diameter of the air cylinder body is not smaller than 1.2. According to the utility model, the deformation influence on the blade groove caused by each working procedure in the compressor production process can be effectively improved, the probability of abnormal noise and abrasion caused by the deformation of the blade groove is greatly reduced, and the quality and reliability of the compressor are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to rolling rotor type compressor technical field, especially rolling rotor type compressor for compressor cylinder. BACKGROUND

[0002] Rolling rotor type compressor is widely used in various electric appliances, for example: refrigerator, air conditioner, freezer, heat pump water heater etc., and its main function is to compress refrigerant gas from low temperature and low pressure state into high temperature and high pressure state. Rolling rotor type compressor is mainly composed of cylinder, rotor, bearing and vane etc. When motor drives rotor to rotate, rotor does eccentric rotation in cylinder. The outer surface of rotor and the inner surface of cylinder body can form a crescent space, and its position changes with the rotation angle of rotor. Vane does reciprocating motion in the vane slot of cylinder, and vane is pressed on the outer surface of rotor by spring or back pressure, and reciprocating vane divides the crescent space into two independent parts, and gas enters into cylinder from suction port, and is gradually compressed and pushed to exhaust port with the rotation of rotor, and finally is discharged from compressor.

[0003] And as one of the important parts of rolling rotor type compressor, cylinder has higher cooperation size and precision requirement, and some procedures (such as bolt tightening, welding etc.) in production and manufacturing process will cause the deformation of vane slot of cylinder to some extent. The outer form of the existing mass-produced cylinder is generally that the outer periphery of cylinder is provided with a protruding part, the protruding part is provided with a suction hole, a vane slot and a spring hole which are communicated with the inner cavity of cylinder, and the wall thickness of the two sides of vane slot is relatively thin, and production procedure (assembly, welding) can easily cause the deformation of vane slot, and severe deformation can cause abnormal noise and abrasion, and affect the normal operation and reliability of compressor. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a cylinder for compressor and rolling rotor type compressor, which can effectively improve the deformation caused by each procedure in the production process of compressor, greatly reduce the probability of abnormal noise and abrasion caused by the deformation of vane slot, and ensure the quality and reliability of compressor.

[0005] In order to achieve the above purpose, the utility model provides a cylinder for compressor, which comprises:

[0006] Cylinder body, which is provided with a cylinder cavity in the inside;

[0007] Protruding part, which protrudes from the outer peripheral surface of the cylinder body, and is provided with a vane slot in the inside, the vane slot extends to the cylinder cavity until being communicated with the cylinder cavity, and the surface of the protruding part away from the cylinder body is an arc surface;

[0008] The ratio of the arc length of the arc surface to the diameter corresponding to the arc surface is not less than 0.7, and the ratio of the arc length of the outer peripheral surface of the cylinder body to the diameter of the cylinder body is not less than 1.2.

[0009] Optionally, the center axis of the arc surface of the convex part and the center axis of the cylinder body are on the same straight line.

[0010] Optionally, the distance from the arc surface of the convex part to the cylinder body is 27mm-29mm.

[0011] Optionally, the ratio of the arc length of the arc surface to the diameter corresponding to the arc surface is not greater than 0.8.

[0012] Optionally, the ratio of the arc length of the outer peripheral surface of the cylinder body to the diameter of the cylinder body is not greater than 1.3.

[0013] Optionally, a chamfer is arranged at the junction of the convex part and the cylinder body.

[0014] Optionally, the radius of the chamfer is not greater than 60mm.

[0015] Optionally, the convex part has two planes parallel to the center axis of the cylinder body, which are a first plane and a second plane respectively, the first plane and the second plane both intersect with the outer peripheral surface of the cylinder body, the angle between the tangent plane of the outer peripheral surface of the cylinder body at the junction with the first plane and the first plane is θ1, and the angle between the tangent plane of the outer peripheral surface of the cylinder body at the junction with the second plane and the second plane is θ2, then 90°<θ1<180° and 90°<θ2<180°.

[0016] Optionally, an air suction hole is arranged on the arc surface of the convex part, the air suction hole extends into the cylinder body and communicates with the cylinder cavity, the first plane is closer to the air suction hole than the second plane, and then θ1≤θ2.

[0017] Based on another aspect of the utility model, the utility model also provides a rolling rotor type compressor, the rolling rotor type compressor has the compressor cylinder as described above.

[0018] In summary, the compressor cylinder and the rolling rotor compressor are provided, the compressor cylinder comprises a cylinder body and a protruding part, the cylinder body is internally provided with a cylinder cavity, the protruding part protrudes from the outer circumferential surface of the cylinder body, the protruding part is internally provided with a vane slot, the vane slot extends to the cylinder cavity, and the vane can reciprocate in the vane slot. The ratio of the arc length of the arc surface of the protruding part to the diameter corresponding to the arc surface and the ratio of the arc length of the protruding part to the diameter of the cylinder body are controlled within a specific range, so that the vane slot has a certain wall thickness on both sides, the deformation of the vane slot during the production and processing (assembly, welding, etc.) of the cylinder is prevented, and the matching size and precision of the vane slot are improved. In other words, the present application can effectively improve the deformation caused by the vane slot in the production process of the compressor, greatly reduce the probability of abnormal noise and wear caused by the deformation of the vane slot, ensure the quality and reliability of the compressor, and limit the upper limit of the wall thickness on both sides of the vane slot to control the external structure of the cylinder for convenient manufacturing and control the material cost of the cylinder.

[0019] As configured above, the protruding part is arranged on the outer circumference of the cylinder body, the vane slot is arranged in the protruding part, the vane slot extends to the cylinder cavity, and the vane can reciprocate in the vane slot. The ratio of the arc length of the arc surface of the protruding part to the diameter corresponding to the arc surface and the ratio of the arc length of the protruding part to the diameter of the cylinder body are controlled within a specific range, so that the vane slot has a certain wall thickness on both sides, the deformation of the vane slot during the production and processing (assembly, welding, etc.) of the cylinder is prevented, and the matching size and precision of the vane slot are improved. In other words, the present application can effectively improve the deformation caused by the vane slot in the production process of the compressor, greatly reduce the probability of abnormal noise and wear caused by the deformation of the vane slot, ensure the quality and reliability of the compressor, and limit the upper limit of the wall thickness on both sides of the vane slot to control the external structure of the cylinder for convenient manufacturing and control the material cost of the cylinder. BRIEF DESCRIPTION OF DRAWINGS

[0020] Those skilled in the art should understand that the provided drawings are used to better understand the present application, and do not constitute any limitation on the scope of the present application. Among them:

[0021] Figure 1 A schematic view of the compressor cylinder of an embodiment of the present application.

[0022] Among them, the reference signs are as follows:

[0023] 1-vane slot; 2-spring hole; 3-air suction hole; 4-cylinder body; 5-protruding part. DETAILED DESCRIPTION

[0024] In this article, unless otherwise stated, the terms "up", "down", "left", "right", "in", "out", "front", "back", "top", "bottom", etc. are used to indicate the orientation or positional relationship based on the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation and operation, therefore it cannot be understood as a limitation on the present application.

[0025] The specific embodiments of this utility model will now be described in more detail with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0026] The preferred embodiments of this utility model are given below with reference to the accompanying drawings and described in detail.

[0027] Figure 1 This is a schematic diagram of a compressor cylinder according to an embodiment of the present invention. Please refer to it. Figure 1 This utility model provides a compressor cylinder and a rolling rotor compressor. The compressor cylinder includes a cylinder body 4 and a protrusion 5. The cylinder body 4 is provided with a cylinder cavity (not shown in the figure).

[0028] The protrusion 5 protrudes from the outer peripheral surface of the cylinder body 4. A vane groove 1 is provided within the protrusion 5, extending towards the cylinder body 4 until it communicates with the cylinder cavity. The surface of the protrusion 5 away from the cylinder body 4 is an arc surface. For example, the central axis of the arc surface of the protrusion 5 and the central axis of the cylinder body 4 are on the same straight line, i.e., the arc surface is coaxial with the cylinder body 4. It can be understood that, with the direction of the cylinder's drive shaft as the axial direction, the central axis of the cylinder body 4 is perpendicular to... Figure 1 The orientation of the paper. Specifically, in this embodiment, the protrusion 5 has five outer surfaces, one of which is an arc surface, and the other four are flat surfaces. These four flat surfaces are directly connected to the cylinder body. Two of these flat surfaces are parallel to the central axis of the cylinder body 4, and the other two are perpendicular to the central axis of the cylinder body 4. The surface of the protrusion 5 that is away from the cylinder body 4 is the arc surface of the protrusion 5 that is not in contact with the cylinder body 4. It is understood that in actual production, two of the four flat surfaces may not be perfectly parallel to the central axis of the cylinder body 4, but only approximately parallel; similarly, the other two flat surfaces may not be perfectly perpendicular to the central axis of the cylinder body 4, but only approximately perpendicular.

[0029] Preferably, the ratio of the arc length of the arc surface to the corresponding diameter is not less than 0.7 and not greater than 0.8, and the ratio of the arc length of the protrusion 5 on the outer circumference of the cylinder body 4 to the diameter of the cylinder body 4 is not less than 1.2 and not greater than 1.3. Let the arc length of the protrusion 5 be L1 (e.g., Figure 1 The diameter corresponding to the arc surface is D1, and the arc length of the protrusion 5 on the outer circumference of the cylinder body 4 is L2 (e.g., the red line segment is marked). Figure 1The diameter of the cylinder body 4 is D2, then 0.7≤L1 / D1≤0.8, and 1.2≤L2 / D2≤1.3. It can be understood that the greater the values of L1 / D1 and L2 / D2, the greater the thickness of the two sides (the two sides perpendicular to the direction of the blade movement) of the vane slot 1 of the convex portion 5, and the greater the resistance to deformation during the production and processing of the cylinder. The present embodiment also sets upper limit values for L1 / D1 and L2 / D2, i.e., sets upper limit values for the thickness of the two sides of the vane slot 1 of the convex portion 5. In the case where the wall thickness of the two sides of the vane slot 1 is sufficient to resist deformation, the outer shape of the cylinder can also be controlled to facilitate manufacturing and control the material cost of the cylinder.

[0030] Further, the distance L3 between the curved surface of the convex portion 5 and the outer circumferential surface of the cylinder body 4 is 27mm-29mm, so as to ensure that the side wall outside the vane slot 1 has a certain thickness in the radial direction of the cylinder body 4, so as to resist deformation that may be caused during the production and processing of the cylinder.

[0031] The junction between the convex portion 5 and the cylinder body 4 is provided with a chamfer, i.e., the junction between the two opposite planes of the convex portion 5 and the outer circumferential surface of the cylinder body 4 is provided with a chamfer, and the two planes of the convex portion 5 are parallel to the central axis of the cylinder body 4. The radius R of the chamfer is not greater than 60mm, so as to ensure that the thickness of the two sides of the vane slot 1 of the convex portion 5 along the direction of the blade movement is relatively uniform. It can be understood that the greater the radius R of the chamfer, the greater L2, i.e., the thicker the portion of the convex portion 5 close to the cylinder body 4, and the more difficult the cylinder is to make. Further, the two opposite planes of the convex portion 5 are respectively a first plane and a second plane, both of which intersect with the outer circumferential surface of the cylinder body 4, the angle between the tangent plane of the outer circumferential surface of the cylinder body 4 at the junction with the first plane and the first plane is θ1, and the angle between the tangent plane of the outer circumferential surface of the cylinder body 4 at the junction with the second plane and the second plane is θ2, then 90°<θ1<180°, and 90°<θ2<180°. The curved surface of the convex portion 5 is provided with a suction hole 3 extending into the cylinder body 4 and communicating with the cylinder cavity, which is used for sucking refrigerant into the cylinder cavity. The first plane is closer to the suction hole 3 than the second plane, then θ1≤θ2. For example, the second plane is closer to the vane slot 1 than the first plane, and θ2 needs to be designed to be larger to ensure the thickness between the vane slot 1 and the second plane, so that the vane slot 1 is not easily deformed.

[0032] The convex portion 5 is provided with a spring hole 2 communicating with the vane slot 1, which is used for accommodating a spring, and the vane is pressed against the outer surface of the rotor in the cylinder cavity by the spring. During the operation of the cylinder, the rotor rotates in the cylinder cavity, and the vane is pressed against the outer surface of the rotor to divide the cylinder cavity into a suction chamber and an exhaust chamber.

[0033] The cylinder for the compressor of the present embodiment can be casted by gray iron, for example.

[0034] Based on another aspect of the utility model, the utility model still provides a kind of rolling rotor compressor, and rolling rotor compressor has the above compressor cylinder.

[0035] In conclusion, the utility model provides a kind of compressor cylinder and rolling rotor compressor, and the compressor cylinder includes cylinder body 4 and protruding portion 5, cylinder cavity is equipped in cylinder body 4;Protruding portion 5 protrudes from the outer circumferential surface of cylinder body 4, vane slot 1 is equipped in protruding portion 5, vane slot 1 extends to cylinder cavity with cylinder body 4, and the face of protruding portion 5 away from cylinder body 4 is arc face;The ratio of the arc length of arc face and the diameter corresponding to arc face is not less than 0.7, and the ratio of the arc length of protruding portion 5 in the outer circumferential surface of cylinder body 4 and the diameter of cylinder body 4 is not less than 1.2.

[0036] As above configuration, protruding portion 5 is arranged on the outer circumferential surface of cylinder body 4, vane slot 1 is arranged in protruding portion 5, vane slot 1 extends to cylinder cavity, and vane can reciprocate in vane slot 1.The utility model controls the ratio of the arc length of arc face of protruding portion 5 and the diameter corresponding to arc face and the ratio of the arc length of protruding portion 5 in the outer circumferential surface of cylinder body 4 and the diameter of cylinder body 4 in specific range, to make the wall thickness of both sides of vane slot 1 certain, to prevent the deformation of vane slot 1 in the process of cylinder production and processing (assembly, welding etc.), improve the fit size and precision of vane slot 1.In other words, the utility model can effectively improve the deformation amount influence of each working procedure in the production process of compressor to vane slot 1, greatly reduce the probability of abnormal noise and abrasion caused by the deformation of vane slot 1, ensure the quality and reliability of compressor;At the same time, the upper limit of the wall thickness of both sides of vane slot 1 is also given range limit, to control the appearance structure of cylinder to facilitate manufacture and control the material cost of cylinder.

[0037] It should be noted that the references in the specification of "one embodiment", "embodiment", "specific embodiment", "some embodiments" and the like only indicate that the described embodiment can include a specific feature, structure or property.And such phrases do not necessarily refer to the same embodiment.In addition, when a specific feature, structure or property is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to realize this feature, structure or property in conjunction with other embodiments whether or not it is explicitly described.

[0038] It should be noted that each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts of each embodiment can be referred to each other.For the system disclosed by the embodiment, since it corresponds to the method disclosed by the embodiment, the description is relatively simple, and the relevant part can be referred to the method part.

[0039] It should also be noted that, although the utility model has disclosed as above with preferred embodiments, the above embodiments are not used to limit the utility model. For any skilled person in the art, without departing from the scope of the utility model technical scheme, the above disclosed technical content can be used to make many possible changes and modifications to the utility model technical scheme, or modified as equivalent examples of equivalent changes. Therefore, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the utility model, which does not deviate from the content of the utility model technical scheme, still belongs to the scope of the utility model technical scheme protection.

[0040] It should also be understood that, unless specifically described or indicated, the terms "first", "second", "third" and the like in the specification are merely used to distinguish different components, elements, steps and the like in the specification, and not to indicate a logical relationship or sequence relationship between the components, elements, steps and the like.

[0041] In addition, it should be recognized that the terms described herein are used only to describe particular embodiments and not to limit the scope of the utility model. It must be noted that the singular forms "a", "an" and "the" used herein include plural referents unless the context clearly dictates otherwise. For example, reference to "a step" or "a device" means reference to one or more steps or devices and can include sub-steps and sub-devices. All conjunctions used herein should be interpreted in the broadest possible sense. In addition, the word "or" should be interpreted as having the logical "or" definition rather than the logical "exclusive or" definition, unless the context clearly indicates otherwise. Furthermore, the implementation of the methods and / or the devices of the embodiments of the utility model can include performing selected tasks manually, automatically or a combination thereof.

Claims

1. A cylinder for a compressor, characterized by, The application relates to a cylinder for a rolling rotor compressor. The cylinder body is internally provided with a cylinder cavity. The protruding part is internally provided with a vane groove which extends to the cylinder body and communicates with the cylinder cavity. The ratio of the arc length of the arc surface to the diameter corresponding to the arc surface is not less than 0.7, and the ratio of the arc length of the protruding part to the diameter of the cylinder body is not less than 1.

2.

2. The cylinder for a compressor according to claim 1, characterized by The center axis of the arc surface of the protruding part and the center axis of the cylinder body are on the same straight line.

3. The cylinder for a compressor according to claim 1, characterized by The distance from the arc surface of the protruding part to the cylinder body is 27-29 mm.

4. The cylinder for a compressor according to claim 1, characterized by The ratio of the arc length of the arc surface to the diameter corresponding to the arc surface is not more than 0.

8.

5. The cylinder for a compressor according to claim 1, characterized by The ratio of the arc length of the protruding part to the diameter of the cylinder body is not more than 1.

3.

6. The cylinder for a compressor according to claim 1, characterized by The intersection of the protruding part and the cylinder body is provided with a chamfer.

7. The cylinder for a compressor according to claim 6, wherein The radius of the chamfer is not more than 60 mm.

8. The cylinder for a compressor according to claim 1, wherein The protruding part has two planes parallel to the center axis of the cylinder body, namely a first plane and a second plane, and the first plane and the second plane both intersect with the outer circumferential surface of the cylinder body.

9. The cylinder for a compressor according to claim 8, characterized by The angle between the tangent plane of the outer circumferential surface of the cylinder body at the intersection with the first plane and the first plane is theta 1, and the angle between the tangent plane of the outer circumferential surface of the cylinder body at the intersection with the second plane and the second plane is theta 2, wherein 90 degrees < theta 1 < 180 degrees and 90 degrees < theta 2 < 180 degrees.

10. A rolling piston compressor characterized by, The arc surface of the protruding part is provided with an air suction hole which extends into the cylinder body and communicates with the cylinder cavity, the first plane is closer to the air suction hole than the second plane, and theta 1 <= theta 2. The rolling rotor compressor has the cylinder as claimed in any one of claims 1 to 9.

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