Rotor compressor

Abstract

The utility model provides a rotor compressor. The rotor compressor comprises a shell; the motor, the air cylinder and the crankshaft are contained in the shell, the air cylinder is provided with an exhaust port, a sliding piece groove and a sliding piece, and the crankshaft transmits rotating force of the motor to the piston to enable the piston to rotate in the air cylinder so as to compress a refrigerant; the air supply pipeline is connected to the compression cavity, and in a cross section perpendicular to the rotating shaft of the motor, a first projection point, based on the cross section, of the center point of the exhaust port and a second projection point, based on the cross section, of the rotating shaft of the motor jointly form a first connecting line; the central point of the air supply port of the air supply pipeline forms a second connecting line together based on a third projection point of the cross section and the second projection point, an included angle theta is formed between the first connecting line and the second connecting line, and the value range of theta is that theta is larger than or equal to 11 degrees and smaller than or equal to 100 degrees. According to the rotor compressor, the air supply amount can be basically not reduced under different working conditions, the operation capacity of the compressor is improved, and the energy efficiency of the compressor and the adaptive capacity of the compressor to different working conditions are both considered.

Description

Technical Field

[0001] The utility model relates to the field of refrigeration equipment, in particular to a rotary compressor with large displacement and small shell diameter. Background Art

[0002] The compressor is the core component of the refrigeration system, and the performance of the compressor determines the capacity of the refrigeration system. When the ambient temperature of the compressor is low, the operating pressure of the compressor is relatively large, and the capacity / energy efficiency is seriously reduced. In order to improve the capacity / energy efficiency of the compressor, injection air supply is usually adopted. The angle between the air supply port and the exhaust port will have different effects on the compressor capacity. When the angle is within the appropriate range, the compressor capacity is optimal. The compressor capacity can be improved by controlling the angle between the air supply port and the exhaust port.

[0003] Therefore, the utility model provides a rotor compressor. Utility Model Content

[0004] In response to the problems in the prior art, the purpose of the utility model is to provide a rotor compressor that overcomes the difficulties of the prior art, is able to maintain a basically unchanged air supply volume under different working conditions, and improves the operating capacity of the compressor, taking into account the energy efficiency of the compressor and the adaptability to different working conditions.

[0005] The utility model provides a rotor compressor, comprising:

[0006] case;

[0007] A motor, a cylinder and a crankshaft are contained in the housing. The cylinder has an exhaust port, a vane groove and a vane. The crankshaft transmits the rotational force of the motor to the piston, so that the piston rotates in the cylinder to compress the refrigerant.

[0008] An air supply pipeline is connected to the compression chamber. In a cross section perpendicular to the rotation axis of the motor, the center point of the exhaust port based on the first projection point of the cross section and the rotation axis of the motor based on the second projection point of the cross section jointly form a first connecting line. The center point of the air supply port of the air supply pipeline based on the third projection point of the cross section and the second projection point jointly form a second connecting line. An angle θ is formed between the first connecting line and the second connecting line, and the value range of θ is 11°≤θ≤100°.

[0009] Preferably, the cylinder comprises an upper cylinder and a lower cylinder, and each of the upper cylinder and the lower cylinder has an exhaust port, a sliding vane groove and a sliding vane;

[0010] Two pistons are rotatably disposed in the upper cylinder and the lower cylinder respectively;

[0011] The crankshaft has two eccentric parts, and the crankshaft transmits the rotational force of the motor to the two pistons. The two eccentric parts respectively drive the two pistons to rotate in their respective cylinders.

[0012] Preferably, it also includes:

[0013] An upper bearing assembly, disposed above the upper cylinder and connected to the inner wall of the housing;

[0014] An intermediate plate is disposed between the upper cylinder and the lower cylinder, and the upper bearing assembly and the intermediate plate clamp the upper cylinder to form an upper compression chamber;

[0015] The lower bearing assembly is arranged below the lower cylinder. The lower bearing assembly and the middle plate clamp the lower cylinder to form a lower compression chamber.

[0016] Preferably, the air supply port is a pipeline, the extension direction of the pipeline is parallel to the rotation axis direction of the motor, and the value range of θ is 11°≤θ≤40°.

[0017] Preferably, the value range of θ is 20°≤θ≤30°.

[0018] Preferably, the air supply pipeline is arranged on the upper cylinder, and the air supply pipeline further comprises:

[0019] A radial tube is arranged on the side wall of the upper cylinder, wherein a first end of the radial tube penetrates and is exposed on the outer surface of the side wall of the upper cylinder, and a second end of the radial tube is connected to the upper end of the air supplement port.

[0020] Preferably, it also includes:

[0021] The inlet is arranged at the bottom of the inner side of the side wall of the upper cylinder and is connected to the lower end of the air supply port.

[0022] Preferably, the air supply pipeline is arranged on the upper bearing assembly, and the air supply pipeline further comprises:

[0023] A radial tube is arranged on the upper bearing assembly, wherein a first end of the radial tube is exposed on the outer wall surface of the upper bearing assembly, and a second end of the radial tube is connected to the upper end of the air supply port.

[0024] Preferably, the lower end of the air supply port is connected to the top surface of the upper compression chamber.

[0025] Preferably, the air supply pipeline is arranged on the middle plate, and the air supply pipeline further comprises:

[0026] A radial tube is arranged on the middle plate, a first end of the radial tube passes through and is exposed on the outer wall surface of the middle plate, a second end is connected to the middle part of the air supply port, and an upper end and a lower end of the air supply port are respectively connected to the bottom surface of the upper compression chamber and the top surface of the lower compression chamber.

[0027] Preferably, an air supply cavity is provided at the upper end and the lower end of the air supply port, respectively, and an air supply valve is provided in each of the air supply cavities.

[0028] In summary, the rotary compressor of the utility model can maintain the air supply volume basically without reduction under different working conditions, and improve the operating capacity of the compressor, taking into account the energy efficiency of the compressor and the adaptability to different working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objectives and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0030] Figure 1 It is a partial cross-sectional view of the first rotor compressor of the utility model.

[0031] Figure 2 for Figure 1 A partial enlarged view of the .

[0032] Figure 3 for Figure 1 The first cross-section of the middle and upper cylinder.

[0033] Figure 4 for Figure 1 Second cross-section of the middle and upper cylinder.

[0034] Figure 5 It is a schematic diagram comparing the compressor capacities of the first rotary compressor of the utility model and a compressor without an air supply port.

[0035] Figure 6 It is a partial cross-sectional view of the second rotor compressor of the utility model.

[0036] Figure 7 for Figure 6 A partial enlarged view of the .

[0037] Figure 8 It is a partial cross-sectional view of the third rotor compressor of the utility model.

[0038] Fig. 9 for Figure 8 A partial enlarged view of the .

[0039] Reference numerals

[0040] 1 Upper bearing assembly

[0041] 2 Upper cylinder

[0042] 3 Middle plate

[0043] 4 Lower cylinder

[0044] 5 Lower bearing assembly

[0045] 6 Air supply pipeline

[0046] 61 Radial tube

[0047] 62 Air supply port

[0048] 63 Import

[0049] 64 Air supplementation cavity

[0050] 65 Air supply valve

[0051] 7 Exhaust port DETAILED DESCRIPTION

[0052] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the present application. The present application can also be implemented or applied through other different specific implementation methods, and the details in the present application can also be modified or changed in various ways according to different viewpoints and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0053] The following is a detailed description of the embodiments of the present application with reference to the accompanying drawings so that those skilled in the art can easily implement the present application. The present application can be embodied in a variety of different forms and is not limited to the embodiments described herein.

[0054] In the representations of the present application, the representations with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the represented specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples represented in the present application and the features of the different embodiments or examples, unless they contradict each other.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the representation of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In order to clearly describe the present application, components irrelevant to the description are omitted, and the same reference symbols are given to the same or similar components throughout the specification.

[0057] Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" by placing other elements therebetween. In addition, when a device is said to "include" a certain component, unless otherwise stated, it does not exclude other components, but means that other components may be included.

[0058] When a device is said to be "on" another device, it may be directly on the other device, but there may also be other devices between it. In contrast, when a device is said to be "directly" on another device, there are no other devices between it.

[0059] Although the terms first, second, etc. are used to represent various elements in some examples, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, the first interface and the second interface, etc. are represented. Moreover, as used in this article, the singular forms "one", "one" and "the" are intended to also include plural forms, unless there is an opposite indication in the context. It should be further understood that the terms "comprising" and "including" indicate the existence of features, steps, operations, elements, components, projects, kinds, and / or groups, but do not exclude the existence, occurrence or addition of one or more other features, steps, operations, elements, components, projects, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Only when the combination of elements, functions, steps or operations is inherently mutually exclusive in some way, will there be an exception to this definition.

[0060] The technical terms used herein are only used to refer to specific embodiments and are not intended to limit the present application. The singular form used herein also includes the plural form unless the sentence clearly indicates the contrary meaning. The meaning of "including" used in the specification is to specify specific characteristics, regions, integers, steps, operations, elements and / or components, and does not exclude the existence or addition of other characteristics, regions, integers, steps, operations, elements and / or components.

[0061] Although not defined differently, all terms, including technical and scientific terms used herein, have the same meaning as those generally understood by those skilled in the art to which this application belongs. Terms defined in commonly used dictionaries are additionally interpreted as having meanings consistent with the relevant technical literature and the contents of the current disclosure, and unless defined, shall not be overly interpreted as ideal or very formal meanings.

[0062] Figure 1 It is a partial cross-sectional view of the first rotor compressor of the utility model. Figure 2 for Figure 1 A partial enlarged view of the . Figure 3 for Figure 1 The first cross-section of the middle and upper cylinder. Figure 4 for Figure 1 The second cross-section of the middle and upper cylinder. Figures 1 to 4 As shown, the rotary compressor of the utility model includes (the following description is made by taking a double-cylinder rotary compressor as an example, but not limited to this): a housing, a motor, an upper cylinder 2, a lower cylinder 4, two pistons, a crankshaft and an air supply pipeline 6. The motor, the upper cylinder 2, and the lower cylinder 4 are accommodated in the housing, and the upper cylinder 2 and the lower cylinder 4 each have an exhaust port 7, a vane groove and a vane. The two pistons are rotatably arranged in the upper cylinder 2 and the lower cylinder 4, respectively. The crankshaft has two eccentric parts, and the crankshaft transmits the rotational force of the motor to the two pistons. The two eccentric parts respectively drive the two pistons to rotate in their respective cylinders to compress the refrigerant. The air supply pipeline 6 is connected to the compression chamber. In the cross section perpendicular to the rotation axis of the motor, the center point of the exhaust port 7 based on the first projection point of the cross section and the rotation axis of the motor based on the second projection point of the cross section jointly form a first connecting line L1. The center point of the air supply port 62 of the air supply pipeline 6 based on the third projection point and the second projection point of the cross section jointly forms a second connecting line L2. An angle θ is formed between the first connecting line L1 and the second connecting line L2, and the value range of θ is 11°≤θ≤100°. Figure 3 The θ in is 95°. Figure 4 The θ in is 25°.

[0063] In a preferred embodiment, it further comprises: an upper bearing assembly 1, an intermediate plate 3 and a lower bearing assembly 5. The upper bearing assembly 1 is arranged above the upper cylinder 2 and connected to the inner wall of the housing. The intermediate plate 3 is arranged between the upper cylinder 2 and the lower cylinder 4. The upper bearing assembly 1 and the intermediate plate 3 clamp the upper cylinder 2 to form an upper compression chamber together. The lower bearing assembly 5 is arranged below the lower cylinder 4. The lower bearing assembly 5 and the intermediate plate 3 clamp the lower cylinder 4 to form a lower compression chamber together, but the present invention is not limited thereto.

[0064] In a preferred embodiment, the air supply port 62 is a pipeline, and the extension direction of the pipeline is parallel to the rotation axis direction of the motor, but not limited thereto.

[0065] In a preferred embodiment, the air supply pipeline 6 is arranged on the upper cylinder 2, and the air supply pipeline 6 also includes: a radial tube 61, which is arranged on the side wall of the upper cylinder 2, and the first end of the radial tube 61 passes through the outer surface of the side wall of the upper cylinder 2, and the second end is connected to the upper end of the air supply port 62, but it is not limited to this.

[0066] In a preferred embodiment, it further includes: an inlet 63, which is arranged at the bottom of the inner side of the side wall of the upper cylinder 2 and is connected to the lower end of the air supply port 62, but is not limited thereto.

[0067] refer to Figures 1 to 4 As shown, the utility model provides a rolling rotor compressor, in which a compression mechanism is arranged in the shell cavity, and the compression mechanism includes a shell, a motor, two pistons, a crankshaft, an upper bearing assembly 1, an upper cylinder 2, a middle plate 3, a lower cylinder 4, a lower bearing assembly 5 and an air supply pipeline 6. The bearing assemblies are respectively arranged on both sides of the axial direction of the cylinder assembly, and the upper cylinder 2 and the lower cylinder 4 respectively contain compression chambers. The piston is arranged in the compression chamber and rolls along the inner wall of the compression chamber. An air supply pipeline 6 is also arranged in the compression mechanism for injecting refrigerant into the compression chamber. One end of the air supply pipeline 6 is connected to the outside of the shell through a radial tube 61, and an air supply port 62 is arranged at one end to communicate with the compression chamber, but it is not limited thereto. The air supply channel in the utility model can be arranged on any compression mechanism such as a cylinder assembly, a middle plate, a bearing, etc., and the air supply port can be arranged on both sides of any compression mechanism, or on any one of the upper and lower surfaces. In the cross section perpendicular to the rotation axis of the motor, the center point of the exhaust port 7 based on the first projection point of the cross section and the rotation axis of the motor based on the second projection point of the cross section jointly form a first line L1, and the center point of the air supply port 62 based on the third projection point and the second projection point of the cross section jointly form a second line L2, and an angle θ is formed between the first line L1 and the second line L2, and θ satisfies 11°≤θ≤100°. The air supply port in the utility model can be directly connected to the compression chamber, or an air supply valve can be set at the air supply channel or the air supply port, and the connection with the compression chamber is controlled by the air supply valve switch. When the air supply valve is set at the air supply channel or the air supply port, the air supply valve can be in any form and made of any material.

[0068] Figure 5 1 is a schematic diagram comparing the compressor capacity of a rotary compressor of the utility model and a compressor without an air supply port. Figure 5As shown, curve G is the function graph of the compressor capacity of the rotary compressor of the utility model under different θ, and straight line H is the function graph of the compressor capacity of the compressor without air supply port. Among them, the value range of θ is 11°≤θ≤40°. In addition, an air supply channel and an air supply port are set in the compressor, and the position of the air supply port will affect the amount of air supply during the compression process and the influence of the clearance volume of the air supply channel on the compression process. When the distance between the air supply port and the exhaust port is too close, the air supply amount may be reduced under the condition of small pressure ratio; when the distance between the air supply port and the exhaust port is too far, the air supply amount may be reduced under the condition of high pressure ratio, so it is necessary to reasonably control the position relationship between the air supply port and the exhaust port. When the angle θ between the air supply port and the exhaust port satisfies 11°≤θ≤100°, the compressor capacity shows different trends, which is generally greater than the capacity without air supply. In particular, when θ is 11°≤θ≤40°, the compressor capacity is in the optimal range. As can be seen from the figure, in contrast to the optimal range, when 0°<θ<11°, 40°<θ≤100°, the compressor capacity decreases relative to the optimal point, but is still higher than the compressor capacity when there is no air supply port, but is not limited to this. The compressor capacity in this embodiment refers to the amount of compressed refrigerant in the compressor per unit time, that is, the cooling capacity or heating capacity per unit time. The difference between compressor capacity and compressor energy efficiency is that compressor energy efficiency needs to be obtained by capacity / power, and compressor capacity does not consider the influence of power.

[0069] In a preferred embodiment, see Figure 5 When the value range of θ is 20°≤θ≤30°, the compressor capacity can reach its peak, but it is not limited to this.

[0070] Figure 6 It is a partial cross-sectional view of the second rotor compressor of the utility model. Figure 7 for Figure 6 A partial enlarged view of the Figure 6 and 7 As shown, the difference between the second type of rotary compressor of the utility model and the first type of rotary compressor is that the position and structure of the air supply pipeline 6 are different. In the second type of rotary compressor, the air supply pipeline 6 is arranged on the upper bearing assembly 1, and the air supply pipeline 6 also includes: a radial tube 61, which is arranged on the upper bearing assembly 1, and the first end of the radial tube 61 is exposed on the outer wall surface of the upper bearing assembly 1, and the second end is connected to the upper end of the air supply port 62. The lower end of the air supply port 62 is connected to the top surface of the upper compression chamber. When the refrigerant flows from the upper bearing assembly 1 through the radial tube 61 to the air supply port 62 (directly connected to the compression chamber), it enters the compression chamber of the upper cylinder 2 from the air supply port 62.

[0071] Figure 8 It is a partial cross-sectional view of the third rotor compressor of the utility model. Fig. 9 for Figure 8 A partial enlarged view of the Figure 8 and9 As shown, the difference between the third type of rotary compressor of the utility model and the first type of rotary compressor is that the position and structure of the air supply pipeline 6 are different. In the third type of rotary compressor, the air supply pipeline 6 is arranged on the middle plate 3, and the air supply pipeline 6 also includes: a radial tube 61, which is arranged on the middle plate 3, the first end of the radial tube 61 is through and exposed on the outer wall surface of the middle plate 3, and the second end is connected to the middle part of the air supply port 62, and the upper end and the lower end of the air supply port 62 are respectively connected to the bottom surface of the upper compression chamber and the top surface of the lower compression chamber. The upper end and the lower end of the air supply port 62 are respectively provided with an air supply cavity 64, and each air supply cavity 64 is respectively provided with an air supply valve 65. When the refrigerant flows from the middle plate 3 to the air supply valves 65 at both ends, the air flow is discharged from the air supply valves 65, and then enters the compression chambers of the upper cylinder 2 and the lower cylinder 4 from the air supply port 62.

[0072] In summary, the rotary compressor of the utility model can maintain the air supply volume basically without reduction under different working conditions, and improve the operating capacity of the compressor, taking into account the energy efficiency of the compressor and the adaptability to different working conditions.

[0073] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rotary compressor, characterized in that: include: case; A motor, a cylinder and a crankshaft are contained in the housing, the cylinder having an exhaust port (7), a vane groove and a vane, the crankshaft transmitting the rotational force of the motor to the piston, causing the piston to rotate in the cylinder to compress the refrigerant; An air supply pipeline (6) is connected to the compression chamber. In a cross section perpendicular to the rotation axis of the motor, the center point of the exhaust port (7) forms a first connecting line based on a first projection point of the cross section and the rotation axis of the motor forms a second connecting line based on a second projection point of the cross section. The center point of the air supply port (62) of the air supply pipeline (6) forms a second connecting line based on a third projection point of the cross section and the second projection point. An angle θ is formed between the first connecting line and the second connecting line, and the value range of θ is 11°≤θ≤100°.

2. The rotary compressor according to claim 1, characterized in that: The cylinder comprises an upper cylinder (2) and a lower cylinder (4), wherein the upper cylinder (2) and the lower cylinder (4) each have an exhaust port (7), a sliding vane groove and a sliding vane; Two pistons are rotatably disposed in the upper cylinder (2) and the lower cylinder (4) respectively; The crankshaft has two eccentric parts, and the crankshaft transmits the rotational force of the motor to the two pistons. The two eccentric parts respectively drive the two pistons to rotate in their respective cylinders.

3. The rotary compressor according to claim 2, characterized in that: Also includes: An upper bearing assembly (1) is arranged above the upper cylinder (2) and connected to the inner wall of the housing; An intermediate plate (3) is arranged between the upper cylinder (2) and the lower cylinder (4); the upper bearing assembly (1) and the intermediate plate (3) clamp the upper cylinder (2) to form an upper compression chamber; The lower bearing assembly (5) is arranged below the lower cylinder (4); the lower bearing assembly (5) and the intermediate plate (3) clamp the lower cylinder (4) to form a lower compression chamber.

4. The rotary compressor according to claim 2, characterized in that: The air supply port (62) is a pipeline, the extension direction of the pipeline is parallel to the rotation axis direction of the motor, and the value range of θ is 11°≤θ≤40°.

5. The rotary compressor according to claim 1, characterized in that: The value range of θ is 20°≤θ≤30°.

6. The rotary compressor according to claim 2, characterized in that: The air supply pipeline (6) is arranged on the upper cylinder (2), and the air supply pipeline (6) further comprises: A radial tube (61) is arranged on the side wall of the upper cylinder (2), wherein the first end of the radial tube (61) penetrates and is exposed on the outer surface of the side wall of the upper cylinder (2), and the second end is connected to the upper end of the air supply port (62); a rotary compressor The inlet (63) is arranged at the bottom of the inner side of the side wall of the upper cylinder (2) and is connected to the lower end of the air supply port (62).

7. The rotary compressor according to claim 3, characterized in that: The air supply pipeline (6) is arranged on the upper bearing assembly (1), and the air supply pipeline (6) further comprises: A radial tube (61) is arranged on the upper bearing assembly (1), a first end of the radial tube (61) is exposed on the outer wall surface of the upper bearing assembly (1), and a second end is connected to the upper end of the air supply port (62).

8. The rotary compressor according to claim 7, characterized in that: The lower end of the air supply port (62) is in communication with the top surface of the upper compression chamber.

9. The rotary compressor according to claim 2, characterized in that: The air supply pipeline (6) is arranged on the middle plate (3), and the air supply pipeline (6) further comprises: A radial tube (61) is arranged on the intermediate plate (3), wherein a first end of the radial tube (61) penetrates through and is exposed on the outer wall surface of the intermediate plate (3), and a second end is connected to the middle part of the air supply port (62), and an upper end and a lower end of the air supply port (62) are respectively connected to the bottom surface of the upper compression chamber and the top surface of the lower compression chamber.

10. The rotary compressor according to claim 2, characterized in that: An air replenishment cavity (64) is provided at the upper end and the lower end of the air replenishment port (62), and an air replenishment valve (65) is provided in each of the air replenishment cavities (64).

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