Rotary compressor

Abstract

The present disclosure provides a rotary compressor including: a shell; a motor, at least one cylinder, and a crankshaft, which are accommodated in the shell, wherein each cylinder is provided with an exhaust port, a vane groove and a vane, the crankshaft is configured to transmit a rotational force of the motor to a piston to rotate the piston in the at least one cylinder to compress refrigerant; a gas supplement pipeline connected to a compression chamber, wherein in a cross-section perpendicular to a rotating axis of the motor, a first connection line is formed by a first projection point of a center point of the exhaust port on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line is formed by a third projection point of a center point of a gas supplement port of the gas supplement pipeline on the cross-section and the second projection point; a value range of an included angle 0 between the first connection line and the second connection line is: 11° ≤ 0 ≤100° . The rotary compressor of the present disclosure can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance the energy efficiency of the compressor and the adaptability to different working conditions.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of refrigeration equipment, and specifically to a rotary compressor with a large displacement and a small shell diameter.BACKGROUND

[0002] The compressor is the core component of a refrigeration system, and its performance determines the capacity of the refrigeration system. When the compressor operates in a low external ambient temperature, the operating pressure ratio of the compressor becomes relatively high, leading to a significant decline in its capacity and energy efficiency. To improve the capacity and energy efficiency of the compressor, an injection gas supplement method is usually adopted. An angle between a gas supplement port and an exhaust port has different impacts on the capacity of the compressor; when the angle falls within an appropriate range, the compressor achieves optimal capacity. Therefore, the capacity of the compressor can be enhanced by controlling the angle between the gas supplement port and the exhaust port.SUMMARY

[0003] To solve the problems in the prior art, the aim of the present disclosure is to provide a rotary compressor, which overcomes the difficulties of the prior art, can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance both the energy efficiency of the compressor and the adaptability to different working conditions.

[0004] The present disclosure provides a rotary compressor including: a shell; a motor, at least one cylinder, and a crankshaft, which are accommodated in the shell, wherein each cylinder is provided with an exhaust port, a vane groove and a vane, the crankshaft is configured to transmit a rotational force of the motor to a piston to rotate the piston in the at least one cylinder to compress refrigerant; a gas supplement pipeline connected to a compression chamber, wherein in a cross-section perpendicular to a rotating axis of the motor, a first connection line is formed by a first projection point of a center point of the exhaust port on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line is formed by a third projection point of a center point of a gas supplement port of the gas supplement pipeline on the cross-section and the second projection point; a value range of an included angle 0 between the first connection line and the second connection line is: 11° ≤ 0 ≤100° .

[0005] In some embodiments, the cylinder includes an upper cylinder and a lower cylinder, each of the upper cylinder and the lower cylinder is provided with the exhaust port, the vane groove and the vane; wherein two pistons are rotatably provided in the upper cylinder and the lower cylinder respectively; wherein the crankshaft has two eccentric parts; the crankshaft is configured to transmit a rotational force of the motor to the two pistons, and the two eccentric parts are configured to drive the two pistons to rotate in corresponding cylinders.

[0006] In some embodiments, the rotary compressor further includes: an upper bearing assembly provided above the upper cylinder and connected to an inner wall of the shell; an intermediate plate provided between the upper cylinder and the lower cylinder, wherein the upper cylinder is configured to be located between the upper bearing assembly and the intermediate plate to jointly form an upper compression chamber; a lower bearing assembly provided below the lower cylinder, wherein the lower cylinder is configured to be located between the lower bearing assembly and the intermediate plate to jointly form a lower compression chamber.

[0007] In some embodiments, the gas supplement port is a pipeline; an extension direction of the pipeline is parallel to a direction of the rotating axis of the motor, and a value range of 0 is 11° ≤ 0 ≤40° .

[0008] In some embodiments, a value range of 0 is 20° ≤ 0 ≤30° .

[0009] In some embodiments, the gas supplement pipeline is provided in the upper cylinder, and the gas supplement pipeline further includes: a radial pipe provided on a side wall of the upper cylinder, wherein a first end of the radial pipe is configured to pass through and be exposed on an outer surface of the side wall of the upper cylinder, and a second end of the radial pipe is in communication with an upper end of the gas supplement port.

[0010] In some embodiments, the rotary further includes: an inlet provided at a bottom of an inner side of the side wall of the upper cylinder and in communication with a lower end of the gas supplement port.

[0011] In some embodiments, the gas supplement pipeline is provided in the upper bearing assembly, and the gas supplement pipeline further includes: a radial pipe provided in the upper bearing assembly, wherein a first end of the radial pipe is exposed on a surface of an outer wall of the upper bearing assembly, and a second end of the radial pipe is in communication with an upper end of the gas supplement port.

[0012] In some embodiments, a lower end of the gas supplement port is in communication with a top surface of the upper compression chamber.

[0013] In some embodiments, the gas supplement pipeline is provided in the intermediate plate, and the gas supplement pipeline further includes: a radial pipe provided in the intermediate plate, wherein a first end of the radial pipe is configured to pass through and be exposed on a surface of an outer wall of the intermediate plate, a second end of the radial pipe is in communication with a middle part of the gas supplement port, and an upper end and a lower end of the gas supplement port are respectively in communication with a bottom surface of the upper compression chamber and a top surface of the lower compression chamber.

[0014] In some embodiments, an upper end and a lower end of the gas supplement port are respectively provided with gas supplement chambers, and each gas supplement chamber is respectively provided with a gas supplement valve.

[0015] In conclusion, the rotary compressor of the present disclosure can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance both the energy efficiency of the compressor and the adaptability to different working conditions.BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of non-limiting embodiments in conjunction with the following drawings, other features, objectives and advantages of the present disclosure will become more apparent. FIG. 1 is a partial cross-sectional diagram of a first type of rotary compressor of the present disclosure. FIG. 2 is a partial enlarged diagram of FIG. 1. FIG. 3 is a first cross-sectional diagram of the upper cylinder in FIG. 1. Fig. 4 is a second cross-sectional diagram of the upper cylinder in FIG. 1. FIG. 5 is a schematic diagram comparing the compressor capacity between the first type of rotary compressor of the present disclosure and a compressor without a gas supplement port. FIG. 6 is a partial cross-sectional diagram of a second type of rotary compressor of the present disclosure. FIG. 7 is a partial enlarged diagram of FIG. 6. FIG. 8 is a partial cross-sectional diagram of the third type of rotary compressor of the present disclosure. FIG. 9 is a partial enlarged diagram of FIG. 8. Reference Numerals

[0017] 1 - Upper Bearing Assembly 2 - Upper Cylinder 3 - Intermediate Plate 4 - Lower Cylinder 5 - Lower Bearing Assembly 6 - Gas Supplement Pipeline 61 - Radial Pipe 62 - Gas Supplement Port 63 - Inlet 64 - Gas Supplement Chamber 65 - Gas Supplement Valve 7 - Exhaust Port DETAILED DESCRIPTION

[0018] The following describes the implementation of the present disclosure through specific examples in conjunction with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in the present disclosure. The present disclosure can also be implemented or applied in other different specific implementation manners, and various modifications or changes can be made to the details in the present disclosure according to different viewpoints and application systems without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0019] In the descriptions of the present disclosure, terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and merge different embodiments or examples and features of different embodiments or examples described in the present disclosure without conflicting with each other.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the descriptions of the present disclosure, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically defined.

[0021] To clearly illustrate the present disclosure, components irrelevant to the description are omitted, and the same or similar components throughout the specification are assigned the same reference signs.

[0022] Throughout the specification, when a component is defined as being "connected" to another component, this includes not only the case of "direct connection" but also the case of "indirect connection" where other elements are interposed therebetween. In addition, when a component is defined as "including" a certain constituent element, unless there is a specific statement to the contrary, it does not exclude other constituent elements but means that other constituent elements may also be included.

[0023] When a component is defined as being "on" another component, it may be directly on the other component, or there may be other components between them. When a component is defined as being "directly on" another component in a comparative context, there are no other components between them.

[0024] The term "including" used in the specification is intended to specify the presence of specific features, regions, integers, steps, operations, elements, and / or components, and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, components, items, categories, and / or groups. It should be further understood that the terms "include" "has" indicate the presence of the stated features, steps, operations, elements, components, items, categories, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, categories, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, meaning any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition occur only when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

[0025] The professional terms used herein are only for referring to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the context clearly indicates the opposite meaning. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0026] Although not defined differently, all terms including technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted to have meanings consistent with relevant technical documents and the content of the present disclosure, and unless defined, they shall not be over-interpreted as having idealized or highly formalized meanings.

[0027] FIG. 1 is a partial cross-sectional diagram of a first type of rotary compressor of the present disclosure. FIG. 2 is a partial enlarged diagram of FIG. 1. FIG. 3 is a first cross-sectional diagram of the upper cylinder in FIG. 1. FIG. 4 is a second cross-sectional diagram of the upper cylinder in FIG. 1. As shown in FIGS. 1 to 4, the rotary compressor of the present disclosure includes (the following description takes a dual-cylinder rotary compressor as an example, but is not limited thereto): a shell, a motor, an upper cylinder 2, a lower cylinder 4, two pistons, a crankshaft, and a gas supplement pipeline 6. The motor, the upper cylinder 2, and the lower cylinder 4 are accommodated in the shell, and each of the upper cylinder 2 and the lower cylinder 4 is provided with an exhaust port 7, a vane groove, and a vane. The two pistons are rotatably disposed in the upper cylinder 2 and the lower cylinder 4 respectively. The crankshaft has two eccentric parts. The crankshaft is configured to transmit a rotational force of the motor to the two pistons; the two eccentric parts respectively drive the two pistons to rotate in their corresponding cylinders to compress refrigerant. The gas supplement pipeline 6 is connected to a compression chamber. In a cross-section perpendicular to the rotating axis of the motor, a first connection line L1 is formed by a first projection point of a center point of the exhaust port 7 on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line L2 is formed by a third projection point of a center point of the gas supplement port 62 of the gas supplement pipeline 6 on the cross-section and the second projection point. An included angle θ is formed between the first connection line L1 and the second connection line L2, and a value range of 0 is 11° ≤ 0 ≤ 100° . For example, the angle 0 in FIG. 3 is 95° , and the angle 0 in FIG. 4 is 25° .

[0028] In an alternative embodiment, the rotary compressor further includes: an upper bearing assembly 1, an intermediate plate 3, and a lower bearing assembly 5. The upper bearing assembly 1 is located above the upper cylinder 2 and connected to an inner wall of the shell. The intermediate plate 3 is located between the upper cylinder 2 and the lower cylinder 4; the upper bearing assembly 1 and the intermediate plate 3 hold the upper cylinder 2 between them to jointly form an upper compression chamber. The lower bearing assembly 5 is located below the lower cylinder 4; the lower bearing assembly 5 and the intermediate plate 3 hold the lower cylinder 4 between them to jointly form a lower compression chamber, but the present disclosure is not limited thereto.

[0029] In an alternative embodiment, the gas supplement port 62 is a pipeline, and an extension direction of the pipeline is parallel to a direction of the rotating axis of the motor, but the present disclosure is not limited thereto.

[0030] In an alternative embodiment, the gas supplement pipeline 6 is disposed in the upper cylinder 2, and the gas supplement pipeline 6 further includes: a radial pipe 61 provided on a side wall of the upper cylinder 2. The first end of the radial pipe 61 pass through and is exposed on an outer surface of the side wall of the upper cylinder 2, and a second end of the radial pipe 61 is in communication with an upper end of the gas supplement port 62, but the present disclosure is not limited thereto.

[0031] In an alternative embodiment, the rotary compressor further includes: an inlet 63 disposed at a bottom of an inner side of the side wall of the upper cylinder 2 and in communication with a lower end of the gas supplement port 62, but the present disclosure is not limited thereto.

[0032] With reference to FIGS. 1 to 4, the present disclosure provides a rotary compressor. A compression mechanism is provided in a cavity of the shell, and the compression mechanism includes a motor, two pistons, a crankshaft, an upper bearing assembly 1, an upper cylinder 2, an intermediate plate 3, a lower cylinder 4, a lower bearing assembly 5, and a gas supplement pipeline 6. The bearing assemblies are respectively disposed on two sides (along an axial direction) of the cylinder assembly (the upper cylinder 2 and the lower cylinder 4). Each of the upper cylinder 2 and the lower cylinder 4 includes a compression chamber, and the pistons are provided in the compression chambers and roll along inner walls of the compression chambers. A gas supplement pipeline 6 is simultaneously provided in the compression mechanism for injecting refrigerant into the compression chambers. One end of the gas supplement pipeline 6 is connected to an outside of the shell through a radial pipe 61, and the other end is provided with a gas supplement port 62 in communication with the compression chamber, but the present disclosure is not limited thereto. The gas supplement channel of the gas supplement pipeline 6 in the present disclosure can be disposed on any compression mechanism such as the cylinder assembly, the intermediate plate, or the bearing; the gas supplement port can be disposed on both sides, or on any one of the upper side and the lower side, of any compression mechanism that can form a compression chamber. In a cross-section perpendicular to the rotating axis of the motor, a first connection line L1 is formed by a first projection point of a center point of the exhaust port 7 on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line L2 is formed by a third projection point of the center point of the gas supplement port 62 on the cross-section and the second projection point. An included angle 0 is formed between the first connection line L1 and the second connection line L2, and the angle 0 satisfies 11° ≤ 0 ≤ 100° . The gas supplement port in the present disclosure can be directly in communication with the compression chamber, or a gas supplement valve can be disposed at the gas supplement channel or the gas supplement port, and the communication with the compression chamber is controlled by the opening and closing of the gas supplement valve. When a gas supplement valve is provided at the gas supplement channel or the gas supplement port, the gas supplement valve can be of any type and made of any material.

[0033] FIG. 5 is a schematic diagram comparing the compressor capacity between the rotary compressor of the present disclosure and a compressor without a gas supplement port. In an alternative embodiment, as shown in FIG. 5, curve G is a function graph of the compressor capacity of the rotary compressor of the present disclosure with different θ values, and line H is a function graph of the compressor capacity of the compressor without a gas supplement port. When a gas supplement channel and a gas supplement port are disposed in the compressor; the position of the gas supplement port affects the amount of gas supplemented during the compression process and the influence of the clearance volume of the gas supplement channel on the compression process. When a distance between the gas supplement port and the exhaust port is too small, the gas supplement amount may decrease under the working condition of a small pressure ratio; when the distance between the gas supplement port and the exhaust port is too large, the gas supplement amount may decrease under the working condition of a high pressure ratio. Therefore, it is necessary to reasonably set the positional relationship between the gas supplement port and the exhaust port. When the included angle θ between the gas supplement port and the exhaust port satisfies the condition: 11° ≤ 0 ≤ 100° , the compressor capacity shows different trends and is generally greater than the compressor capacity without gas supplement. In particular, when the value of 0 is in the optimal range of 11° ≤ 0 ≤40° , the compressor capacity is in the optimal range. It can be seen from the drawings that, in contrast to the optimal range, under the condition 0° < 0 < 11° or 40° < 0 ≤100° , the compressor capacity decreases relative to the optimal point but is still higher than the compressor capacity of the compressor without a gas supplement port, but the present disclosure is not limited thereto. The compressor capacity in this embodiment refers to the amount of refrigerant compressed 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 is obtained by dividing capacity by power, while compressor capacity is not influenced by the power.

[0034] In an alternative embodiment, continuing to refer to FIG. 5, when the value range of 0 is 20° ≤ 0 ≤30° , the compressor capacity can reach the peak, but the present disclosure is not limited thereto.

[0035] FIG. 6 is a partial cross-sectional diagram of the second type of rotary compressor of the present disclosure. FIG. 7 is a partial enlarged diagram of FIG. 6. As shown in FIGS. 6 and 7, the difference between the second type of rotary compressor of the present disclosure and the first type lies in the position and structure of the gas supplement pipeline 6. In the second type of rotary compressor, the gas supplement pipeline 6 is provided in the upper bearing assembly 1, and the gas supplement pipeline 6 further includes: a radial pipe 61 disposed in the upper bearing assembly 1. A first end of the radial pipe 61 is exposed on a surface of an outer wall of the upper bearing assembly 1, and a second end is in communication with an upper end of the gas supplement port 62. The lower end of the gas supplement port 62 is in communication with a top surface of the upper compression chamber. When the refrigerant flows from the upper bearing assembly 1 through the radial pipe 61 to the gas supplement port 62 (directly in communication with the compression chamber), the refrigerant enters the compression chamber of the upper cylinder 2 from the gas supplement port 62.

[0036] FIG. 8 is a partial cross-sectional diagram of a third type of rotary compressor of the present disclosure. FIG. 9 is a partial enlarged diagram of FIG. 8. As shown in FIGS. 8 and 9, the difference between the third type of rotary compressor of the present disclosure and the first type lies in the position and structure of the gas supplement pipeline 6. In the third type of rotary compressor, the gas supplement pipeline 6 is provided in the intermediate plate 3, and the gas supplement pipeline 6 further includes a radial pipe 61 provided in the intermediate plate 3. A first end of the radial pipe 61 passes through and is exposed on the outer wall surface of the intermediate plate 3, and a second end of the radial pipe 61 is in communication with the middle part of the gas supplement port 62. The upper end and lower end of the gas supplement port 62 are respectively in communication with a bottom surface of the upper compression chamber and a top surface of the lower compression chamber. The upper end and lower end of the gas supplement port 62 are respectively provided with gas supplement chambers 64, and each gas supplement chamber 64 is provided with a gas supplement valve 65. When the refrigerant flows from the intermediate plate 3 to the gas supplement valves 65 at both ends, the gas flow is discharged from the gas supplement valves 65 and then enters the compression chambers of the upper cylinder 2 and the lower cylinder 4 respectively from the gas supplement port 62.

[0037] In conclusion, the rotary compressor of the present disclosure can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance both the energy efficiency of the compressor and the adaptability to different working conditions.

[0038] The above content is a further detailed description of the present disclosure in conjunction with specific alternative embodiments, and it shall not be deemed that the specific implementation of the present disclosure is limited only to these descriptions. For those skilled in the art of the present disclosure, several simple deductions or substitutions can be made without departing from the concept of the present disclosure, which shall all be regarded as falling within the protection scope of the present disclosure.

Examples

Embodiment Construction

[0018]The following describes the implementation of the present disclosure through specific examples in conjunction with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in the present disclosure. The present disclosure can also be implemented or applied in other different specific implementation manners, and various modifications or changes can be made to the details in the present disclosure according to different viewpoints and application systems without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0019]In the descriptions of the present disclosure, terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that a specific feature, structure, material, or characteristic...

TECHNICAL FIELD

[0001] The present disclosure relates to the field of refrigeration equipment, and specifically to a rotary compressor with a large displacement and a small shell diameter.BACKGROUND

[0002] The compressor is the core component of a refrigeration system, and its performance determines the capacity of the refrigeration system. When the compressor operates in a low external ambient temperature, the operating pressure ratio of the compressor becomes relatively high, leading to a significant decline in its capacity and energy efficiency. To improve the capacity and energy efficiency of the compressor, an injection gas supplement method is usually adopted. An angle between a gas supplement port and an exhaust port has different impacts on the capacity of the compressor; when the angle falls within an appropriate range, the compressor achieves optimal capacity. Therefore, the capacity of the compressor can be enhanced by controlling the angle between the gas supplement port and the exhaust port.SUMMARY

[0003] To solve the problems in the prior art, the aim of the present disclosure is to provide a rotary compressor, which overcomes the difficulties of the prior art, can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance both the energy efficiency of the compressor and the adaptability to different working conditions.

[0004] The present disclosure provides a rotary compressor including: a shell; a motor, at least one cylinder, and a crankshaft, which are accommodated in the shell, wherein each cylinder is provided with an exhaust port, a vane groove and a vane, the crankshaft is configured to transmit a rotational force of the motor to a piston to rotate the piston in the at least one cylinder to compress refrigerant; a gas supplement pipeline connected to a compression chamber, wherein in a cross-section perpendicular to a rotating axis of the motor, a first connection line is formed by a first projection point of a center point of the exhaust port on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line is formed by a third projection point of a center point of a gas supplement port of the gas supplement pipeline on the cross-section and the second projection point; a value range of an included angle 0 between the first connection line and the second connection line is: 11° ≤ 0 ≤100° .

[0005] In some embodiments, the cylinder includes an upper cylinder and a lower cylinder, each of the upper cylinder and the lower cylinder is provided with the exhaust port, the vane groove and the vane; wherein two pistons are rotatably provided in the upper cylinder and the lower cylinder respectively; wherein the crankshaft has two eccentric parts; the crankshaft is configured to transmit a rotational force of the motor to the two pistons, and the two eccentric parts are configured to drive the two pistons to rotate in corresponding cylinders.

[0006] In some embodiments, the rotary compressor further includes: an upper bearing assembly provided above the upper cylinder and connected to an inner wall of the shell; an intermediate plate provided between the upper cylinder and the lower cylinder, wherein the upper cylinder is configured to be located between the upper bearing assembly and the intermediate plate to jointly form an upper compression chamber; a lower bearing assembly provided below the lower cylinder, wherein the lower cylinder is configured to be located between the lower bearing assembly and the intermediate plate to jointly form a lower compression chamber.

[0007] In some embodiments, the gas supplement port is a pipeline; an extension direction of the pipeline is parallel to a direction of the rotating axis of the motor, and a value range of 0 is 11° ≤ 0 ≤40° .

[0008] In some embodiments, a value range of 0 is 20° ≤ 0 ≤30° .

[0009] In some embodiments, the gas supplement pipeline is provided in the upper cylinder, and the gas supplement pipeline further includes: a radial pipe provided on a side wall of the upper cylinder, wherein a first end of the radial pipe is configured to pass through and be exposed on an outer surface of the side wall of the upper cylinder, and a second end of the radial pipe is in communication with an upper end of the gas supplement port.

[0010] In some embodiments, the rotary further includes: an inlet provided at a bottom of an inner side of the side wall of the upper cylinder and in communication with a lower end of the gas supplement port.

[0011] In some embodiments, the gas supplement pipeline is provided in the upper bearing assembly, and the gas supplement pipeline further includes: a radial pipe provided in the upper bearing assembly, wherein a first end of the radial pipe is exposed on a surface of an outer wall of the upper bearing assembly, and a second end of the radial pipe is in communication with an upper end of the gas supplement port.

[0012] In some embodiments, a lower end of the gas supplement port is in communication with a top surface of the upper compression chamber.

[0013] In some embodiments, the gas supplement pipeline is provided in the intermediate plate, and the gas supplement pipeline further includes: a radial pipe provided in the intermediate plate, wherein a first end of the radial pipe is configured to pass through and be exposed on a surface of an outer wall of the intermediate plate, a second end of the radial pipe is in communication with a middle part of the gas supplement port, and an upper end and a lower end of the gas supplement port are respectively in communication with a bottom surface of the upper compression chamber and a top surface of the lower compression chamber.

[0014] In some embodiments, an upper end and a lower end of the gas supplement port are respectively provided with gas supplement chambers, and each gas supplement chamber is respectively provided with a gas supplement valve.

[0015] In conclusion, the rotary compressor of the present disclosure can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance both the energy efficiency of the compressor and the adaptability to different working conditions.BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of non-limiting embodiments in conjunction with the following drawings, other features, objectives and advantages of the present disclosure will become more apparent. FIG. 1 is a partial cross-sectional diagram of a first type of rotary compressor of the present disclosure. FIG. 2 is a partial enlarged diagram of FIG. 1. FIG. 3 is a first cross-sectional diagram of the upper cylinder in FIG. 1. Fig. 4 is a second cross-sectional diagram of the upper cylinder in FIG. 1. FIG. 5 is a schematic diagram comparing the compressor capacity between the first type of rotary compressor of the present disclosure and a compressor without a gas supplement port. FIG. 6 is a partial cross-sectional diagram of a second type of rotary compressor of the present disclosure. FIG. 7 is a partial enlarged diagram of FIG. 6. FIG. 8 is a partial cross-sectional diagram of the third type of rotary compressor of the present disclosure. FIG. 9 is a partial enlarged diagram of FIG. 8. Reference Numerals

[0017] 1 - Upper Bearing Assembly 2 - Upper Cylinder 3 - Intermediate Plate 4 - Lower Cylinder 5 - Lower Bearing Assembly 6 - Gas Supplement Pipeline 61 - Radial Pipe 62 - Gas Supplement Port 63 - Inlet 64 - Gas Supplement Chamber 65 - Gas Supplement Valve 7 - Exhaust Port DETAILED DESCRIPTION

[0018] The following describes the implementation of the present disclosure through specific examples in conjunction with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in the present disclosure. The present disclosure can also be implemented or applied in other different specific implementation manners, and various modifications or changes can be made to the details in the present disclosure according to different viewpoints and application systems without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0019] In the descriptions of the present disclosure, terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and merge different embodiments or examples and features of different embodiments or examples described in the present disclosure without conflicting with each other.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one such feature. In the descriptions of the present disclosure, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically defined.

[0021] To clearly illustrate the present disclosure, components irrelevant to the description are omitted, and the same or similar components throughout the specification are assigned the same reference signs.

[0022] Throughout the specification, when a component is defined as being "connected" to another component, this includes not only the case of "direct connection" but also the case of "indirect connection" where other elements are interposed therebetween. In addition, when a component is defined as "including" a certain constituent element, unless there is a specific statement to the contrary, it does not exclude other constituent elements but means that other constituent elements may also be included.

[0023] When a component is defined as being "on" another component, it may be directly on the other component, or there may be other components between them. When a component is defined as being "directly on" another component in a comparative context, there are no other components between them.

[0024] The term "including" used in the specification is intended to specify the presence of specific features, regions, integers, steps, operations, elements, and / or components, and does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, components, items, categories, and / or groups. It should be further understood that the terms "include" "has" indicate the presence of the stated features, steps, operations, elements, components, items, categories, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, categories, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, meaning any one or any combination. Thus, "A, B or C" or "A, B and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition occur only when combinations of elements, functions, steps, or operations are inherently mutually exclusive in some way.

[0025] The professional terms used herein are only for referring to specific embodiments and are not intended to limit the present disclosure. The singular form used herein also includes the plural form unless the context clearly indicates the opposite meaning. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0026] Although not defined differently, all terms including technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present disclosure belongs. Terms defined in commonly used dictionaries are additionally interpreted to have meanings consistent with relevant technical documents and the content of the present disclosure, and unless defined, they shall not be over-interpreted as having idealized or highly formalized meanings.

[0027] FIG. 1 is a partial cross-sectional diagram of a first type of rotary compressor of the present disclosure. FIG. 2 is a partial enlarged diagram of FIG. 1. FIG. 3 is a first cross-sectional diagram of the upper cylinder in FIG. 1. FIG. 4 is a second cross-sectional diagram of the upper cylinder in FIG. 1. As shown in FIGS. 1 to 4, the rotary compressor of the present disclosure includes (the following description takes a dual-cylinder rotary compressor as an example, but is not limited thereto): a shell, a motor, an upper cylinder 2, a lower cylinder 4, two pistons, a crankshaft, and a gas supplement pipeline 6. The motor, the upper cylinder 2, and the lower cylinder 4 are accommodated in the shell, and each of the upper cylinder 2 and the lower cylinder 4 is provided with an exhaust port 7, a vane groove, and a vane. The two pistons are rotatably disposed in the upper cylinder 2 and the lower cylinder 4 respectively. The crankshaft has two eccentric parts. The crankshaft is configured to transmit a rotational force of the motor to the two pistons; the two eccentric parts respectively drive the two pistons to rotate in their corresponding cylinders to compress refrigerant. The gas supplement pipeline 6 is connected to a compression chamber. In a cross-section perpendicular to the rotating axis of the motor, a first connection line L1 is formed by a first projection point of a center point of the exhaust port 7 on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line L2 is formed by a third projection point of a center point of the gas supplement port 62 of the gas supplement pipeline 6 on the cross-section and the second projection point. An included angle θ is formed between the first connection line L1 and the second connection line L2, and a value range of 0 is 11° ≤ 0 ≤ 100° . For example, the angle 0 in FIG. 3 is 95° , and the angle 0 in FIG. 4 is 25° .

[0028] In an alternative embodiment, the rotary compressor further includes: an upper bearing assembly 1, an intermediate plate 3, and a lower bearing assembly 5. The upper bearing assembly 1 is located above the upper cylinder 2 and connected to an inner wall of the shell. The intermediate plate 3 is located between the upper cylinder 2 and the lower cylinder 4; the upper bearing assembly 1 and the intermediate plate 3 hold the upper cylinder 2 between them to jointly form an upper compression chamber. The lower bearing assembly 5 is located below the lower cylinder 4; the lower bearing assembly 5 and the intermediate plate 3 hold the lower cylinder 4 between them to jointly form a lower compression chamber, but the present disclosure is not limited thereto.

[0029] In an alternative embodiment, the gas supplement port 62 is a pipeline, and an extension direction of the pipeline is parallel to a direction of the rotating axis of the motor, but the present disclosure is not limited thereto.

[0030] In an alternative embodiment, the gas supplement pipeline 6 is disposed in the upper cylinder 2, and the gas supplement pipeline 6 further includes: a radial pipe 61 provided on a side wall of the upper cylinder 2. The first end of the radial pipe 61 pass through and is exposed on an outer surface of the side wall of the upper cylinder 2, and a second end of the radial pipe 61 is in communication with an upper end of the gas supplement port 62, but the present disclosure is not limited thereto.

[0031] In an alternative embodiment, the rotary compressor further includes: an inlet 63 disposed at a bottom of an inner side of the side wall of the upper cylinder 2 and in communication with a lower end of the gas supplement port 62, but the present disclosure is not limited thereto.

[0032] With reference to FIGS. 1 to 4, the present disclosure provides a rotary compressor. A compression mechanism is provided in a cavity of the shell, and the compression mechanism includes a motor, two pistons, a crankshaft, an upper bearing assembly 1, an upper cylinder 2, an intermediate plate 3, a lower cylinder 4, a lower bearing assembly 5, and a gas supplement pipeline 6. The bearing assemblies are respectively disposed on two sides (along an axial direction) of the cylinder assembly (the upper cylinder 2 and the lower cylinder 4). Each of the upper cylinder 2 and the lower cylinder 4 includes a compression chamber, and the pistons are provided in the compression chambers and roll along inner walls of the compression chambers. A gas supplement pipeline 6 is simultaneously provided in the compression mechanism for injecting refrigerant into the compression chambers. One end of the gas supplement pipeline 6 is connected to an outside of the shell through a radial pipe 61, and the other end is provided with a gas supplement port 62 in communication with the compression chamber, but the present disclosure is not limited thereto. The gas supplement channel of the gas supplement pipeline 6 in the present disclosure can be disposed on any compression mechanism such as the cylinder assembly, the intermediate plate, or the bearing; the gas supplement port can be disposed on both sides, or on any one of the upper side and the lower side, of any compression mechanism that can form a compression chamber. In a cross-section perpendicular to the rotating axis of the motor, a first connection line L1 is formed by a first projection point of a center point of the exhaust port 7 on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line L2 is formed by a third projection point of the center point of the gas supplement port 62 on the cross-section and the second projection point. An included angle 0 is formed between the first connection line L1 and the second connection line L2, and the angle 0 satisfies 11° ≤ 0 ≤ 100° . The gas supplement port in the present disclosure can be directly in communication with the compression chamber, or a gas supplement valve can be disposed at the gas supplement channel or the gas supplement port, and the communication with the compression chamber is controlled by the opening and closing of the gas supplement valve. When a gas supplement valve is provided at the gas supplement channel or the gas supplement port, the gas supplement valve can be of any type and made of any material.

[0033] FIG. 5 is a schematic diagram comparing the compressor capacity between the rotary compressor of the present disclosure and a compressor without a gas supplement port. In an alternative embodiment, as shown in FIG. 5, curve G is a function graph of the compressor capacity of the rotary compressor of the present disclosure with different θ values, and line H is a function graph of the compressor capacity of the compressor without a gas supplement port. When a gas supplement channel and a gas supplement port are disposed in the compressor; the position of the gas supplement port affects the amount of gas supplemented during the compression process and the influence of the clearance volume of the gas supplement channel on the compression process. When a distance between the gas supplement port and the exhaust port is too small, the gas supplement amount may decrease under the working condition of a small pressure ratio; when the distance between the gas supplement port and the exhaust port is too large, the gas supplement amount may decrease under the working condition of a high pressure ratio. Therefore, it is necessary to reasonably set the positional relationship between the gas supplement port and the exhaust port. When the included angle θ between the gas supplement port and the exhaust port satisfies the condition: 11° ≤ 0 ≤ 100° , the compressor capacity shows different trends and is generally greater than the compressor capacity without gas supplement. In particular, when the value of 0 is in the optimal range of 11° ≤ 0 ≤40° , the compressor capacity is in the optimal range. It can be seen from the drawings that, in contrast to the optimal range, under the condition 0° < 0 < 11° or 40° < 0 ≤100° , the compressor capacity decreases relative to the optimal point but is still higher than the compressor capacity of the compressor without a gas supplement port, but the present disclosure is not limited thereto. The compressor capacity in this embodiment refers to the amount of refrigerant compressed 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 is obtained by dividing capacity by power, while compressor capacity is not influenced by the power.

[0034] In an alternative embodiment, continuing to refer to FIG. 5, when the value range of 0 is 20° ≤ 0 ≤30° , the compressor capacity can reach the peak, but the present disclosure is not limited thereto.

[0035] FIG. 6 is a partial cross-sectional diagram of the second type of rotary compressor of the present disclosure. FIG. 7 is a partial enlarged diagram of FIG. 6. As shown in FIGS. 6 and 7, the difference between the second type of rotary compressor of the present disclosure and the first type lies in the position and structure of the gas supplement pipeline 6. In the second type of rotary compressor, the gas supplement pipeline 6 is provided in the upper bearing assembly 1, and the gas supplement pipeline 6 further includes: a radial pipe 61 disposed in the upper bearing assembly 1. A first end of the radial pipe 61 is exposed on a surface of an outer wall of the upper bearing assembly 1, and a second end is in communication with an upper end of the gas supplement port 62. The lower end of the gas supplement port 62 is in communication with a top surface of the upper compression chamber. When the refrigerant flows from the upper bearing assembly 1 through the radial pipe 61 to the gas supplement port 62 (directly in communication with the compression chamber), the refrigerant enters the compression chamber of the upper cylinder 2 from the gas supplement port 62.

[0036] FIG. 8 is a partial cross-sectional diagram of a third type of rotary compressor of the present disclosure. FIG. 9 is a partial enlarged diagram of FIG. 8. As shown in FIGS. 8 and 9, the difference between the third type of rotary compressor of the present disclosure and the first type lies in the position and structure of the gas supplement pipeline 6. In the third type of rotary compressor, the gas supplement pipeline 6 is provided in the intermediate plate 3, and the gas supplement pipeline 6 further includes a radial pipe 61 provided in the intermediate plate 3. A first end of the radial pipe 61 passes through and is exposed on the outer wall surface of the intermediate plate 3, and a second end of the radial pipe 61 is in communication with the middle part of the gas supplement port 62. The upper end and lower end of the gas supplement port 62 are respectively in communication with a bottom surface of the upper compression chamber and a top surface of the lower compression chamber. The upper end and lower end of the gas supplement port 62 are respectively provided with gas supplement chambers 64, and each gas supplement chamber 64 is provided with a gas supplement valve 65. When the refrigerant flows from the intermediate plate 3 to the gas supplement valves 65 at both ends, the gas flow is discharged from the gas supplement valves 65 and then enters the compression chambers of the upper cylinder 2 and the lower cylinder 4 respectively from the gas supplement port 62.

[0037] In conclusion, the rotary compressor of the present disclosure can maintain the gas supplement amount basically unchanged under different working conditions, improve the operating capacity of the compressor, and balance both the energy efficiency of the compressor and the adaptability to different working conditions.

[0038] The above content is a further detailed description of the present disclosure in conjunction with specific alternative embodiments, and it shall not be deemed that the specific implementation of the present disclosure is limited only to these descriptions. For those skilled in the art of the present disclosure, several simple deductions or substitutions can be made without departing from the concept of the present disclosure, which shall all be regarded as falling within the protection scope of the present disclosure.

Examples

Embodiment Construction

[0018]The following describes the implementation of the present disclosure through specific examples in conjunction with the accompanying drawings. Those skilled in the art can easily understand other advantages and effects of the present disclosure from the content disclosed in the present disclosure. The present disclosure can also be implemented or applied in other different specific implementation manners, and various modifications or changes can be made to the details in the present disclosure according to different viewpoints and application systems without departing from the spirit of the present disclosure. It should be noted that the embodiments in the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0019]In the descriptions of the present disclosure, terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that a specific feature, structure, material, or characteristic...

Claims

1. A rotary compressor including: a shell; a motor, at least one cylinder, and a crankshaft, which are accommodated in the shell, wherein each cylinder is provided with an exhaust port (7), a vane groove and a vane, the crankshaft is configured to transmit a rotational force of the motor to a piston to rotate the piston in the at least one cylinder to compress refrigerant; a gas supplement pipeline (6) connected to a compression chamber, wherein in a cross-section perpendicular to a rotating axis of the motor, a first connection line is formed by a first projection point of a center point of the exhaust port (7) on the cross-section and a second projection point of the rotating axis of the motor on the cross-section; a second connection line is formed by a third projection point of a center point of a gas supplement port (62) of the gas supplement pipeline (6) on the cross-section and the second projection point; a value range of an included angle 0 between the first connection line and the second connection line is: 11° ≤ 0 ≤100° .

2. The rotary compressor according to claim 1, wherein the cylinder includes an upper cylinder (2) and a lower cylinder (4), each of the upper cylinder (2) and the lower cylinder (4) is provided with the exhaust port (7), the vane groove and the vane; wherein two pistons are rotatably provided in the upper cylinder (2) and the lower cylinder (4) respectively; wherein the crankshaft has two eccentric parts; the crankshaft is configured to transmit a rotational force of the motor to the two pistons, and the two eccentric parts are configured to drive the two pistons to rotate in corresponding cylinders.

3. The rotary compressor according to claim 2 further including: an upper bearing assembly (1) provided above the upper cylinder (2) and connected to an inner wall of the shell; an intermediate plate (3) provided between the upper cylinder (2) and the lower cylinder (4), wherein the upper cylinder (2) is configured to be located between the upper bearing assembly (1) and the intermediate plate (3) to jointly form an upper compression chamber; a lower bearing assembly (5) provided below the lower cylinder (4), wherein the lower cylinder (4) is configured to be located between the lower bearing assembly (5) and the intermediate plate (3) to jointly form a lower compression chamber.

4. The rotary compressor according to claim 2, wherein the gas supplement port (62) is a pipeline; an extension direction of the pipeline is parallel to a direction of the rotating axis of the motor, and a value range of 0 is 11° ≤ 0 ≤40° .

5. The rotary compressor according to claim 1, wherein a value range of 0 is 20° ≤ 0 ≤30° .

6. The rotary compressor according to claim 2, wherein the gas supplement pipeline (6) is provided in the upper cylinder (2), and the gas supplement pipeline (6) further includes: a radial pipe (61) provided on a side wall of the upper cylinder (2), wherein a first end of the radial pipe (61) is configured to pass through and be exposed on an outer surface of the side wall of the upper cylinder (2), and a second end of the radial pipe (61) is in communication with an upper end of the gas supplement port (62); an inlet (63) provided at a bottom of an inner side of the side wall of the upper cylinder (2) and in communication with a lower end of the gas supplement port (62).

7. The rotary compressor according to claim 3, wherein the gas supplement pipeline (6) is provided in the upper bearing assembly (1), and the gas supplement pipeline (6) further includes: a radial pipe (61) provided in the upper bearing assembly (1), wherein a first end of the radial pipe (61) is exposed on a surface of an outer wall of the upper bearing assembly (1), and a second end of the radial pipe (61) is in communication with an upper end of the gas supplement port (62).

8. The rotary compressor according to claim 7, wherein a lower end of the gas supplement port (62) is in communication with a top surface of the upper compression chamber.

9. The rotary compressor according to claim 2, wherein the gas supplement pipeline (6) is provided in the intermediate plate (3), and the gas supplement pipeline (6) further includes: a radial pipe (61) provided in the intermediate plate (3), wherein a first end of the radial pipe (61) is configured to pass through and be exposed on a surface of an outer wall of the intermediate plate (3), a second end of the radial pipe (61) is in communication with a middle part of the gas supplement port (62), and an upper end and a lower end of the gas supplement port (62) are respectively in communication with a bottom surface of the upper compression chamber and a top surface of the lower compression chamber.

10. The rotary compressor according to claim 2, wherein an upper end and a lower end of the gas supplement port (62) are respectively provided with gas supplement chambers (64), and each gas supplement chamber (64) is respectively provided with a gas supplement valve (65).

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