Rotary compressor

Abstract

The invention provides a rotary compressor system which comprises a compressor body, and the compressor body comprises a cylindrical shell, a rotary shaft and a rotary shaft. The crankshaft, the motor, the upper cylinder cover, the lower cylinder cover and the air cylinder assembly are contained in the shell, and the upper cylinder cover and the lower cylinder cover are arranged on the upper end face and the lower end face of the air cylinder assembly respectively to form a plurality of compression spaces used for compressing refrigerants; the eccentric part of the crankshaft penetrates through the upper cylinder cover and the lower cylinder cover, and a plurality of compression spaces are formed in the upper cylinder cover, the lower cylinder cover and the cylinder assembly; the motor comprises a stator and a rotor, the outer diameter and the inner diameter of the stator are D1 and D2 respectively, and the height of the motor is H; the outer diameter D1 of the stator ranges from 50 mm to 108 mm; the volume V of the stator ranges from 70 cm < 3 > to 600 cm < 3 >; and the displacement of the rotary compressor ranges from 3.0 cc to 15.0 cc. The rotary compressor system is high in space utilization rate, high in energy efficiency and wide in application range.

Description

Technical Field

[0001] This invention relates to the field of compressor-related technology, and more specifically, to a rotary compressor. Background Technology

[0002] Miniaturization and vibration reduction of rotary compressors have become an inevitable trend in various application fields. In the market for fixed-speed compressors in heat pump dryers, water heaters, and other fields, the current mainstream products still adopt a medium-sized shell single-cylinder structure. However, with increasingly stringent installation space constraints and users' ever-increasing performance requirements, the market competitiveness of traditional single-cylinder compressors is gradually weakening.

[0003] Meanwhile, industry competitors are accelerating technological breakthroughs in compressor miniaturization, vibration reduction, and efficiency. Therefore, developing new pump body structures to optimize energy efficiency, reduce vibration, improve user experience, and further enhance product competitiveness, specifically addressing the unique operating environment and usage requirements of heat pump compressors, has become an inevitable choice for the industry.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To address the problems in the prior art, the present invention aims to provide a rotary compressor system that features high space utilization, high energy efficiency, low vibration, and wide applicability.

[0006] Specifically, the present invention provides a rotary compressor system, including a compressor body, the compressor body comprising:

[0007] case;

[0008] The crankshaft, motor, upper cylinder head, lower cylinder head, and cylinder assembly are housed within the housing. The upper cylinder head and lower cylinder head are respectively disposed on the upper and lower end faces of the cylinder assembly, forming multiple compression spaces for compressing refrigerant.

[0009] The eccentric portion of the crankshaft passes through the upper cylinder head and the lower cylinder head, forming multiple compression spaces in the upper cylinder head, lower cylinder head, and cylinder assembly.

[0010] The motor includes a stator and a rotor, the outer diameter and inner diameter of the stator are D1 and D2 respectively, and the height of the motor is H;

[0011] The volume of the stator is V. satisfy:

[0012] The outer diameter D1 of the stator is between 50 and 108 mm;

[0013] The volume V of the stator is between 70 and 600 cm³. 3 between;

[0014] The displacement of the rotary compressor is between 3.0cc and 15.0cc.

[0015] According to some examples of the present invention, the compressor body is a dual-cylinder compressor, and the cylinder assembly includes a first cylinder, a first piston, a first vane, an intermediate plate, a second cylinder, a second piston, and a second vane;

[0016] The ratio of the height h1 of the first blade to the outer diameter D1 of the stator, h1 / D1, is between 0.120 and 0.304; and / or

[0017] The ratio of the height h2 of the second blade to the outer diameter D1 of the stator, h2 / D1, is between 0.120 and 0.304.

[0018] According to some examples of the invention, the ratio of the height h3 of the first piston to the radius R1 of the first piston, h3 / R1, is between 0.68 and 1.8; and / or

[0019] The ratio of the height h4 of the second piston to the radius R2 of the second piston, h4 / R2, is between 0.68 and 1.8.

[0020] According to some examples of the present invention, the ratio h5 / d1 of the height h5 of the first cylinder to the inner diameter d1 of the first cylinder is between 0.33 and 0.6; and / or

[0021] The ratio of the height h6 of the second cylinder to the inner diameter d2 of the second cylinder, h6 / d2, is between 0.33 and 0.6.

[0022] According to some examples of the invention, the ratio of the height of the intermediate plate to the height of the second cylinder is between 0.2 and 1.5; and / or

[0023] The ratio of the height of the intermediate plate to the height of the first cylinder is between 0.2 and 1.5.

[0024] According to some examples of the present invention, in the upper cylinder head and / or the lower cylinder head, the cross-sectional area of ​​the exhaust port is greater than or equal to 9.6 mm². 2 ; and / or

[0025] The thickness of the exhaust port is less than or equal to 2.8 mm.

[0026] According to some examples of the invention, the ratio of the crankshaft's eccentricity e to the stator's outer diameter D1, e / D1, is between 0.006 and 0.069.

[0027] According to some examples of the invention, the radius of the crankshaft is less than or equal to 8.5 mm.

[0028] According to some examples of the invention, the rotary compressor system further includes a liquid receiver;

[0029] The cylinder assembly is provided with an air intake port, and the liquid reservoir is provided with an inner tube and an air outlet pipe connected to the inner tube. The air outlet pipe is connected to the air intake port.

[0030] The ratio of the inner diameter of the inner tube of the liquid reservoir to the total length of the vent pipe is between 0.04 and 0.15.

[0031] Compared with the prior art, the optimized design of the stator outer diameter and volume of the rotary compressor of the present invention makes the compressor structure compact and suitable for space-constrained applications, such as household air conditioners and small commercial equipment. The displacement range can be adapted to different cooling and heating needs, and can be flexibly matched from small household appliances to medium-sized cooling and heating equipment. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Other features, objects, and advantages of the invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. Furthermore, the drawings are merely illustrative diagrams of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities.

[0033] Figure 1 This is a schematic diagram of the structure of a rotary compressor system according to an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the upper cylinder head according to an embodiment of the present invention. Detailed Implementation

[0035] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present invention can be modified or changed according to different viewpoints and application systems without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0036] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement it. The present invention can be embodied in many different forms and is not limited to the embodiments described herein.

[0037] In the representation of this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics represented in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. Furthermore, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples. Moreover, those skilled in the art can combine and integrate different embodiments or examples represented in this invention, as well as features of different embodiments or examples, without contradiction.

[0038] To clearly illustrate the present invention, components unrelated to the description are omitted, and the same or similar constituent elements throughout the specification are given the same reference numerals.

[0039] Throughout this specification, when it is said that a device is "connected" to another device, this includes not only "direct connection" but also "indirect connection" by placing other components in between. Furthermore, when it is said that a device "comprises" a certain constituent element, unless otherwise stated otherwise, this does not exclude other constituent elements, but rather implies that other constituent elements may be included.

[0040] When we say that a device is "above" another device, this can mean that it is directly above the other device, or it can mean that other devices are present in between. Conversely, when we say that a device is "directly" "above" another device, there are no other devices present in between.

[0041] Although the terms first, second, etc., are used in some instances herein to refer to various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, first interface and second interface, etc., are used. Furthermore, as used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” indicate the presence of features, steps, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms “or” and “and / or” as used herein are interpreted as inclusive, or mean any one or any combination thereof. Thus, “A, B, or C” or “A, B, and / or C” means “any one of: A; B; C; A and B; A and C; B and C; A, B, and C.” Exceptions to this definition will only occur if the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0042] The technical terms used herein are for reference only to specific embodiments and are not intended to limit the invention. The singular form used herein includes the plural form unless the statement explicitly indicates otherwise. The word "comprising" as used in this specification means to specify a particular characteristic, region, integer, step, operation, element, and / or component, and does not exclude the presence or addition of other characteristics, regions, integers, steps, operations, elements, and / or components.

[0043] Unless otherwise defined in this application, all terms, including technical and scientific terms as used herein, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries shall be further interpreted as having a meaning consistent with relevant technical literature and the content of this present instruction, and shall not be over-interpreted as having an ideal or overly formulaic meaning unless otherwise defined.

[0044] The structure of the rotary compressor of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments are not intended to limit the scope of protection of the present invention.

[0045] This invention provides a rotary compressor system that can be applied to dehumidifiers, clothes dryers, heat pump water heaters, and other fields. Figure 1 This is a schematic diagram of a rotary compressor system according to an embodiment of the present invention. The rotary compressor system includes a compressor body, specifically, the compressor body includes:

[0046] Cylindrical shell 1;

[0047] The crankshaft 2, motor, upper cylinder head 41, lower cylinder head 42 and cylinder assembly are housed in the housing 1. The upper cylinder head 41 and lower cylinder head 42 are respectively disposed on the upper end face and lower end face of the cylinder assembly, forming multiple compression spaces for compressing refrigerant.

[0048] The long shaft portion of the crankshaft 2 passes through the motor, which includes a stator 31 and a rotor 32. More specifically, the upper end of the long shaft portion of the crankshaft 2 is fitted into the inner hole of the rotor 32. A portion of the long shaft portion of the crankshaft 2 adjacent to the eccentric portion is fitted into the bearing hole of the upper cylinder head 41. The eccentric portion of the crankshaft 2 passes through the upper cylinder head and the lower cylinder head, forming multiple compression spaces in the upper cylinder head 41, the lower cylinder head 42, and the cylinder assembly. The crankshaft 2 is used to transmit rotational force, and the rotor transmits the rotational force to the long shaft portion of the crankshaft and drives the eccentric block of the crankshaft to rotate eccentrically.

[0049] The outer diameter and inner diameter of the stator 31 of the rotary compressor of the present invention are D1 and D2, respectively, and the height of the motor is H; the volume of the stator is defined as V. The following conditions must be met: the outer diameter D1 of stator 31 is between 50 and 108 mm, and the volume V of stator is between 70 and 600 cm³. 3 The displacement of the rotary compressor ranges from 3.0cc to 15.0cc. The optimized design of the stator outer diameter and volume of the rotary compressor in this invention makes the compressor structure compact, suitable for space-constrained applications such as household air conditioners and small commercial equipment. Its displacement range adapts to different cooling needs, allowing for flexible matching from small household appliances to medium-sized refrigeration equipment.

[0050] In one embodiment, the compressor body is a dual-cylinder compressor. In this case, the cylinder assembly includes a first cylinder 51, a first piston 52, a first vane 53, an intermediate plate 55, a second cylinder 56, a second piston 57, and a second vane 58 (not shown in the figure). The upper cylinder cover 41, the first cylinder 51, and the intermediate plate 55 form a compression space, and the intermediate plate 55, the second cylinder 56, and the lower cylinder cover 42 form another compression space. The first cylinder 51 / second cylinder 56 are provided with vane slots. The first vane 53 has a first vane body and a first vane spring. The first vane body abuts against the first piston 52, and the first vane spring is housed at the bottom of the vane slot. During the operation of the compressor, the elastic force of the first vane spring can make the outer surfaces of the first vane body and the first piston 52 fit tightly together, ensuring a good sealing effect between the two and effectively isolating the high-pressure side and the low-pressure side of the compression space. Similarly, the second blade 58 has a second blade body and a second blade spring. The second blade body abuts against the second piston 57, and the second blade spring is housed at the bottom of the blade groove. During the operation of the compressor, the elastic force of the second blade spring can make the outer surfaces of the second blade body and the second piston 57 fit tightly together, ensuring a good sealing effect between them and effectively isolating the high-pressure side and the low-pressure side of the compression space.

[0051] Within a set displacement range, the cylinder volume utilization rate can be improved by designing the cylinder height-to-diameter ratio range, thereby increasing pump efficiency; and the ratio of blade height to stator outer diameter can be improved by setting the ratio of blade height to stator outer diameter, thereby improving structural efficiency. For example, the ratio of the height h5 of the first cylinder 51 to its inner diameter d1, h5 / d1, is between 0.33 and 0.6; the ratio of the height h6 of the second cylinder 56 to its inner diameter d2, h6 / d2, is between 0.33 and 0.6. The ratio of the height h1 of the first blade 53 to the outer diameter D1 of the stator 31, h1 / D1, can be between 0.120 and 0.304; similarly, the ratio of the height h2 of the second blade 58 to the outer diameter D1 of the stator, h2 / D1, can be between 0.120 and 0.304.

[0052] Furthermore, the ratio of the height of the intermediate plate 55 to the height of the first cylinder 51 is between 0.2 and 1.5, and the ratio of the height of the intermediate plate 55 to the height of the second cylinder 56 is between 0.2 and 1.5. By adjusting the height ratio of the intermediate plate to the cylinder, the crankshaft deflection is reduced, thereby reducing the compressor friction power loss.

[0053] In one embodiment, the height h3 of the first piston 52 and the radius R1 of the first piston are in the ratio h3 / R1 between 0.68 and 1.8, and the height h4 of the second piston 57 and the radius R2 of the second piston are in the ratio h4 / R2 between 0.68 and 1.8. The height-to-diameter ratio structure of the pistons can improve the pump efficiency of the compressor.

[0054] In some other embodiments, the radius of crankshaft 2 is less than or equal to 8.5 mm, and the eccentricity of crankshaft 2 is e. The ratio of eccentricity e to the outer diameter D1 of stator 31, e / D1, can be between 0.006 and 0.069. By designing the ratio of crankshaft eccentricity to stator outer diameter, pump efficiency and motor efficiency can be further improved.

[0055] The compressor body of the present invention has an exhaust port on its upper cylinder head 41 and / or lower cylinder head 42. Taking the upper cylinder head 41 having an exhaust port 411 as an example, see... Figure 2 The cross-sectional area of ​​the exhaust port 411 is greater than or equal to 9.6 mm², and the thickness t of the exhaust port 411 can be less than or equal to 2.8 mm. When the cylinder head is provided with an exhaust port, the above configuration is also effective. Compressed gas in the compression space through the exhaust port enters the housing. The aforementioned exhaust port area and thickness can reduce the clearance volume of the compressor and reduce exhaust losses.

[0056] The rotary compressor system also includes a liquid receiver 9. The cylinder assembly is provided with a suction port 59, which can be located in the first cylinder, the second cylinder, or an intermediate plate; no limitation is made here. The liquid receiver 9 is provided with an inner tube 91 and an outlet pipe 92 connected to the inner tube 91. The outlet pipe 92 communicates with the suction port 59 of the compressor body. Preferably, the ratio of the inner diameter of the inner tube 91 to the total length of the outlet pipe 92 is between 0.04 and 0.15. This ratio of the inner diameter of the inner tube 91 to the total length of the outlet pipe 92 can increase the suction volume, thereby improving the cooling capacity of the compressor system.

[0057] Table 1 lists the structural parameters and corresponding performance parameters of the compressors in various embodiments of the present invention.

[0058]

[0059]

[0060] Table 1 shows the structural parameters and corresponding performance parameters of the compressors in various embodiments of the present invention. As can be seen from Table 1, under the same cooling capacity conditions, compressor 2 is smaller in size and has a significantly lower vibration level than compressor 1. Compressor 2 has superior cooling capacity and lower vibration level than the smaller compressor 3.

[0061] In summary, based on the structural design of each component of the compressor system described above, the resulting rotary compressor system has a more compact overall structure, further reducing the overall height and weight of the compressor and minimizing compressor vibration.

[0062] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0063] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A rotary compressor system, characterized in that, Includes a compressor body, the compressor body comprising: case; The crankshaft, motor, upper cylinder head, lower cylinder head, and cylinder assembly are housed within the housing. The upper cylinder head and lower cylinder head are respectively disposed on the upper and lower end faces of the cylinder assembly, forming multiple compression spaces for compressing refrigerant. The eccentric portion of the crankshaft passes through the upper cylinder head and the lower cylinder head, forming multiple compression spaces in the upper cylinder head, lower cylinder head, and cylinder assembly. The motor includes a stator and a rotor, the outer diameter and inner diameter of the stator are D1 and D2 respectively, and the height of the motor is H; The volume of the stator is V. satisfy: The outer diameter D1 of the stator is between 50 and 108 mm; The volume V of the stator is between 70 and 600 cm³. 3 between; The displacement of the rotary compressor is between 3.0cc and 15.0cc.

2. The rotary compressor system according to claim 1, characterized in that, The compressor body is a dual-cylinder compressor, and the cylinder assembly includes a first cylinder, a first piston, a first vane, an intermediate plate, a second cylinder, a second piston, and a second vane. The ratio of the height h1 of the first blade to the outer diameter D1 of the stator, h1 / D1, is between 0.120 and 0.304; and / or The ratio of the height h2 of the second blade to the outer diameter D1 of the stator, h2 / D1, is between 0.120 and 0.

304.

3. The rotary compressor system according to claim 2, characterized in that, The ratio of the height h3 of the first piston to its radius R1, h3 / R1, is between 0.68 and 1.8; and / or The ratio of the height h4 of the second piston to the radius R2 of the second piston, h4 / R2, is between 0.68 and 1.

8.

4. The rotary compressor system according to claim 2, characterized in that, The ratio of the height h5 of the first cylinder to the inner diameter d1 of the first cylinder, h5 / d1, is between 0.33 and 0.6; and / or The ratio of the height h6 of the second cylinder to the inner diameter d2 of the second cylinder, h6 / d2, is between 0.33 and 0.

6.

5. The rotary compressor system according to claim 2, characterized in that, The ratio of the height of the intermediate plate to the height of the second cylinder is between 0.2 and 1.5; and / or The ratio of the height of the intermediate plate to the height of the first cylinder is between 0.2 and 1.

5.

6. The rotary compressor system according to claim 2, characterized in that, The upper cylinder head and / or the lower cylinder head are provided with exhaust ports, and the cross-sectional area of ​​the exhaust ports is greater than or equal to 9.6 mm². 2 ; and / or The thickness of the exhaust port is less than or equal to 2.8 mm.

7. The rotary compressor system according to claim 1, characterized in that, The ratio of the crankshaft's eccentricity e to the stator's outer diameter D1, e / D1, is between 0.006 and 0.

069.

8. The rotary compressor system according to claim 1, characterized in that, The radius of the crankshaft is less than or equal to 8.5 mm.

9. The rotary compressor system according to claim 1, characterized in that, The rotary compressor system also includes a liquid receiver; The cylinder assembly is provided with an air intake port, and the liquid reservoir is provided with an inner tube and an air outlet pipe connected to the inner tube. The air outlet pipe is connected to the air intake port. The ratio of the inner diameter of the inner tube of the liquid reservoir to the total length of the vent pipe is between 0.04 and 0.15.

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