Compressor and refrigeration system

Abstract

The application relates to the compressor technical field and discloses a compressor and a refrigeration system. The compressor comprises a first compression cylinder configured with a first compression cavity, a second compression cylinder configured with a first sub-compression cavity and a second sub-compression cavity, a gas outlet of the first compression cavity being communicated with a gas inlet of the second sub-compression cavity, a gas outlet of the first sub-compression cavity being communicated with a gas inlet of the second sub-compression cavity, and first-stage compressed gas in the first compression cavity and first-stage compressed gas in the first sub-compression cavity being capable of entering the second sub-compression cavity to be second-stage compressed. In the embodiment, the gas can be first-stage compressed in the first compression cavity and the first sub-compression cavity, the volume of the compression cavity for first-stage compression of the gas is increased, the first sub-compression cavity is a part of the second compression cylinder and does not increase the volume of the second compression cylinder and the first compression cylinder, the gas displacement can be increased under the same cylinder body specification, the heating capacity is increased, the heating effect is improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, for example to a compressor and a refrigeration system. BACKGROUND

[0002] In view of the current winter heating demand in low-temperature areas, there are various technical solutions of compressors applying air conditioning heat pump principles to meet the demand for high refrigeration capacity. Among them, the two-stage technical solution compressor is a relatively effective solution. This solution can be realized in the compressor pump body structure through two-stage compression. In a low-temperature environment, a large compression ratio is used to share the compression ratio through two-stage compression, effectively improving the compression efficiency, improving the energy efficiency and refrigeration capacity, and meeting the demand for large heating capacity in a low-temperature environment.

[0003] For example, a compressor is disclosed in the related art, which includes a first compression chamber and a second compression chamber. The first compression chamber includes a first compression chamber having a first exhaust port. The first exhaust port is connected to the second compression chamber, and the first exhaust port is used to allow the refrigerant after one-stage compression in the first compression chamber to enter the second compression chamber for two-stage compression.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] In the related art, gas is compressed in the one-stage compression chamber and then enters the two-stage compression chamber for compression. However, due to the fixed structure of the two-stage compressor, the compressor volume is fixed within the same cylinder size range. If it is necessary to further improve the heating capacity, the only way is to increase the displacement. However, after increasing the displacement, it is necessary to increase the cylinder size, further increasing the volume and cost of the compressor.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine the key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The embodiments of the present disclosure provide a compressor and a refrigeration system to improve the refrigeration capacity of the compressor under the same cylinder size of the compressor, improve the heating effect, and take into account the volume and cost of the compressor.

[0009] According to an embodiment of the first aspect of the present application, a compressor is provided, comprising: a first compression cylinder configured with a first compression cavity; a second compression cylinder configured with a first sub-compression cavity and a second sub-compression cavity; a gas outlet of the first compression cavity is connected to a gas inlet of the second sub-compression cavity, and a gas outlet of the first sub-compression cavity is connected to a gas inlet of the second sub-compression cavity, so that the gas compressed in the first compression cavity and the gas compressed in the first sub-compression cavity can enter the second sub-compression cavity for secondary compression.

[0010] In some optional embodiments, the second compression cylinder is configured with a second compression cavity, a first sliding slot and a second sliding slot, and the first sliding slot and the second sliding slot are respectively connected to the second compression cavity; the compressor further comprises: a piston arranged in the second compression cylinder; a first sliding vane, one end of the first sliding vane is arranged in the first sliding slot, the first sliding vane is movable relative to the first sliding slot, and the other end of the first sliding vane is in abutment with a first position of an outer side wall of the piston; a second sliding vane, one end of the second sliding vane is arranged in the second sliding slot, the second sliding vane is movable relative to the second sliding slot, and the other end of the second sliding vane is in abutment with a second position of the outer side wall of the piston; wherein the first sliding vane and the second sliding vane divide the second compression cavity into the first sub-compression cavity and the second sub-compression cavity.

[0011] In some optional embodiments, along the circumferential direction of the piston, the angle range of the folding angle formed by the first sliding vane and the second sliding vane corresponding to the first sub-compression cavity is 150 degrees to 180 degrees.

[0012] In some optional embodiments, the volume ratio of the first compression cavity to the second compression cavity is 0.71 to 1.

[0013] In some optional embodiments, the volume ratio of the sum of the volume of the first compression cavity and the volume of the first sub-compression cavity to the volume of the second sub-compression cavity is 1.2 to 1.5.

[0014] In some optional embodiments, the compressor further comprises: a gas storage cylinder configured with a gas storage cavity, the gas outlet of the first compression cavity is connected to a gas inlet of the gas storage cavity, the gas outlet of the first sub-compression cavity is connected to the gas inlet of the gas storage cavity, and the gas outlet of the gas storage cavity is connected to the gas inlet of the second sub-compression cavity.

[0015] In some optional embodiments, along the axial direction of the compressor, the second compression cylinder, the first compression cylinder and the gas storage cylinder are sequentially arranged.

[0016] In some optional embodiments, along the radial direction of the first compression cylinder, the cylinder body of the first compression cylinder is configured with an exhaust passage and a gas supply passage, the exhaust passage is connected between the gas outlet of the first sub-compression cavity and the gas inlet of the gas storage cavity, and the gas supply passage is connected between the gas storage outlet of the gas storage cavity and the gas inlet of the second sub-compression cavity.

[0017] In some optional embodiments, the compressor further comprises a makeup pipe, an air outlet of the makeup pipe being in communication with the makeup port of the gas storage cavity.

[0018] According to embodiments of the second aspect of the present application, a refrigeration system is provided, comprising the compressor as described in any one of the preceding embodiments.

[0019] The compressor and the refrigeration system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] The compressor comprises a first compression cylinder and a second compression cylinder. The first compression cylinder is configured with a first compression cavity, and a gas can be compressed in the first compression cavity in a first stage. The second compression cylinder is configured with a second sub-compression cavity, and the gas can be compressed in the second sub-compression cavity in a second stage. An air outlet of the first compression cavity is in communication with an air inlet of the second sub-compression cavity, so that the gas compressed in the first stage in the first compression cavity can enter the second sub-compression cavity to be compressed in the second stage. The first compression cavity and the second compression cylinder can compress the gas in stages to improve the compression efficiency of the gas. The second compression cylinder is further configured with a first sub-compression cavity, and the gas can be compressed in the first sub-compression cavity in the first stage. An air outlet of the first sub-compression cavity is in communication with the air inlet of the second sub-compression cavity, so that the gas compressed in the first stage in the first sub-compression cavity can also enter the second sub-compression cavity to be compressed in the second stage. The second compression cylinder is configured with the first sub-compression cavity and the second sub-compression cavity, and the gas can be compressed in the first stage in the first compression cavity and the first sub-compression cavity. In this way, the volume of the compression cavity in which the gas is compressed in the first stage is increased, so as to increase the displacement of the gas and the heating capacity and improve the heating effect. Moreover, the first sub-compression cavity is a part of the original cavity of the second compression cylinder, and the volume of the second compression cylinder and the first compression cylinder is not increased. The displacement of the gas can be increased under the same cylinder specification, and the situation that the volume of the cylinder of the compressor is increased to increase the displacement of the gas and the production cost of the compressor is reduced. The heating effect is improved without changing the volume of the compressor and reducing the production cost.

[0021] The foregoing general description and the following description are only exemplary and explanatory, and are not intended to limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by the corresponding drawings, which are only illustrative and explanatory, and do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, the drawings do not constitute a proportional limitation, and wherein:

[0023] Figure 1 is a schematic diagram of a cross-sectional structure of a compressor in one direction provided by the embodiments of the present disclosure;

[0024] Figure 2is a structural schematic view of another direction of a section of a compressor provided by an embodiment of the present disclosure;

[0025] Figure 3 is a structural schematic view of another direction of a section of a compressor provided by an embodiment of the present disclosure;

[0026] Figure 4 is a structural schematic view of another direction of a section of a compressor provided by an embodiment of the present disclosure;

[0027] Figure 5 is a structural schematic view of a gas flow direction inside a compressor provided by an embodiment of the present disclosure;

[0028] Figure 6 is a structural schematic view of a gas flow direction inside another compressor provided by an embodiment of the present disclosure.

[0029] Reference signs:

[0030] 100, first compression cylinder; 110, first compression chamber; 120, third sliding vane groove; 121, third sliding vane; 130, main intake passage; 140, first sub-intake passage; 150, exhaust passage; 160, gas supply passage; 200, second compression cylinder; 210, second compression chamber; 211, first sub-compression chamber; 212, second sub-compression chamber; 220, first sliding vane groove; 221, first sliding vane; 230, second sliding vane groove; 231, second sliding vane; 300, piston (first piston); 310, second piston; 400, gas storage cylinder; 410, gas storage chamber; 420, gas supplement pipe; 500, partition plate; 510, second sub-intake passage. DETAILED DESCRIPTION

[0031] In order to enable a more detailed understanding of the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings, which are for reference only and do not limit the embodiments of the present disclosure. In the following technical description, in order to facilitate explanation, a plurality of details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to facilitate the drawings.

[0032] The terms "first", "second", and the like in the specification and claims of the embodiments of the present disclosure and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0033] In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0034] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixedly connected, detachably connected, or integrally configured; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0035] The term "and / or" is a description of the association relationship of the object, which means that there can be three relationships. For example, A and / or B means: A or B, or, A and B, three relationships.

[0036] It should be noted that the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0037] The present disclosure provides a kind of compressor, such as Figures 1 to 6 As shown, the compressor includes a first compression cylinder 100 and a second compression cylinder 200, the first compression cylinder 100 is configured with a first compression chamber 110, and the second compression cylinder 200 is configured with a first sub-compression chamber 211 and a second sub-compression chamber 212. The gas outlet of the first compression chamber 110 is communicated with the gas inlet of the second sub-compression chamber 212, the gas outlet of the first sub-compression chamber 211 is communicated with the gas inlet of the second sub-compression chamber 212, and the gas compressed in the first compression chamber 110 and the gas compressed in the first sub-compression chamber 211 can enter the second sub-compression chamber 212 for secondary compression.

[0038] In this embodiment, the compressor includes a first compression cylinder 100 and a second compression cylinder 200. The first compression cylinder 100 has a first compression chamber 110, within which gas can undergo primary compression. The second compression cylinder 200 has a second sub-compression chamber 212, within which gas can undergo secondary compression. The outlet of the first compression chamber 110 is connected to the inlet of the second sub-compression chamber 212, so that gas undergoing primary compression in the first compression chamber 110 can enter the second sub-compression chamber 212 for secondary compression. The first compression chamber 110 and the second compression chamber 210 can compress gas in stages to improve gas compression efficiency. The second compression cylinder 200 also has a first sub-compression chamber 211, within which gas can undergo primary compression. The outlet of the first sub-compression chamber 211 is connected to the inlet of the second sub-compression chamber 212, so that gas undergoing primary compression in the first sub-compression chamber 211 can also enter the second sub-compression chamber 212 for secondary compression. The second compression cylinder 200 is constructed with a first sub-compression chamber 211 and a second sub-compression chamber 212. Gas can undergo primary compression within the first compression chamber 110 and the first sub-compression chamber 211, thus increasing the volume of the compression chambers for primary gas compression, thereby increasing gas displacement, increasing heating capacity, and improving heating effect. Furthermore, the first sub-compression chamber 211 is a portion separated from the original cavity of the second compression cylinder 200, without increasing the volume of the second compression cylinder 200 and the first compression cylinder 100. This allows for increased gas displacement within the same cylinder size, reducing the need to increase the compressor's cylinder volume and production costs when increasing gas displacement. This improves heating effect without changing the compressor's size, thereby reducing production costs.

[0039] In this embodiment, the gas pressure in the first sub-compression chamber 211 is less than the gas pressure in the second sub-compression chamber 212, and the gas pressure in the first compression chamber 110 is less than the gas pressure in the second sub-compression chamber 212. The first compression chamber 110 is a primary compression chamber, the first sub-compression chamber 211 is a primary compression chamber, and the second sub-compression chamber 212 is a secondary compression chamber.

[0040] Furthermore, such as Figure 3As shown, the second compression cylinder 200 is configured with a second compression chamber 210, a first sliding vane groove 220 and a second sliding vane groove 230, and the first sliding vane groove 220 and the second sliding vane groove 230 are respectively communicated with the second compression chamber 210. The compressor further comprises a piston 300 (hereinafter referred to as a first piston 300 for the sake of distinction), a first sliding vane 221 and a second sliding vane 231. The first piston 300 is arranged in the second compression cylinder 200, one end of the first sliding vane 221 is arranged in the first sliding vane groove 220, the first sliding vane 221 can move relative to the first sliding vane groove 220, the other end of the first sliding vane 221 abuts against a first position of an outer side wall of the first piston 300, one end of the second sliding vane 231 is arranged in the second sliding vane groove 230, the second sliding vane 231 can move relative to the second sliding vane groove 230, and the other end of the second sliding vane 231 abuts against a second position of the outer side wall of the first piston 300. The first sliding vane 221 and the second sliding vane 231 divide the second compression chamber 210 into a first sub-compression chamber 211 and a second sub-compression chamber 212.

[0041] In this embodiment, the second compression cylinder 200 is configured with a second compression chamber 210, a first sliding vane groove 220 communicated with the second compression chamber 210 and a second sliding vane groove 230 communicated with the second compression chamber 210. One end of the first sliding vane 221 is arranged in the first sliding vane groove 220, and the other end of the first sliding vane 221 abuts against the first position of the first piston 300. In this way, when the first piston 300 rotates eccentrically in the second compression chamber 210, the first sliding vane 221 can be driven by the first piston 300 to move along the first sliding vane groove 220, and the cavities of the second compression chamber 210 on both sides of the first sliding vane 221 are not communicated through the first sliding vane 221.

[0042] One end of the second sliding vane 231 is arranged in the second sliding vane groove 230, and the other end of the second sliding vane 231 abuts against the second position of the first piston 300. In this way, when the first piston 300 rotates eccentrically in the second compression chamber 210, the second sliding vane 231 can be driven by the first piston 300 to move along the second sliding vane groove 230, and the cavities of the second compression chamber 210 on both sides of the second sliding vane 231 are not communicated through the second sliding vane 231. In this way, the first sliding vane 221 and the second sliding vane 231 can divide the second compression chamber 210 into the first sub-compression chamber 211 and the second sub-compression chamber 212, and the first sub-compression chamber 211 and the second sub-compression chamber 212 are not communicated through the first sliding vane 221 and the second sliding vane 231, so that the first sub-compression chamber 211 and the second sub-compression chamber 212 can respectively compress gas.

[0043] In this embodiment, the first sub-compression chamber 211 is set as a primary compression chamber. The volume of the primary compression chamber includes the volume of the first sub-compression chamber 211 and the volume of the first compression chamber 110. In this way, the volume of the primary compression chamber can be increased without increasing the volume of the first compression cylinder 100 and the second compression cylinder 200. The displacement of the compressor is determined by the volume of the primary compression chamber, thereby increasing the displacement of the compressor without increasing the volume of the compressor and improving the heating effect of the compressor.

[0044] Furthermore, compared to existing technologies, when a first compression chamber 110 is provided, a portion of the second compression chamber 210 is designated as a first sub-compression chamber 211. This not only increases the volume of the first-stage compression chamber but also reduces the volume of the compression chamber performing the second-stage compression. Consequently, the volume ratio of the compression chamber performing the first-stage compression (first compression chamber 110 and first sub-compression chamber 211) to the compression chamber performing the second-stage compression (second sub-compression chamber 212) is increased, thereby improving the compressor's pressure ratio and thus enhancing the compressor's efficiency and heating effect.

[0045] It should be noted that in this embodiment, the first position and the second position of the outer wall of the first piston 300 are not fixed. As the first piston 300 rotates in the second compression chamber 210, the first position and the second position also change. The first position and the second position are limited in this embodiment in order to limit the other end of the first slide 221 and the other end of the second slide 231 to abutting different positions on the outer wall of the first piston 300 at the same time.

[0046] Furthermore, the compressor also includes a first force-applying device and a second force-applying device. The first force-applying device is disposed in the first vane groove 220 and connected to the first vane 221. The second force-applying device is disposed in the second vane groove 230 and connected to the second vane 231. Thus, the first force-applying device ensures that the first vane 221 is always in contact with the first piston 300, and the second force-applying device ensures that the second vane 231 is always in contact with the first piston 300, thereby improving the sealing performance of the first sub-compression chamber 211 and the second sub-compression chamber 212. Optionally, the first force-applying device includes a first spring, and the second force-applying device includes a second spring.

[0047] Similarly, as Figure 4 As shown, the first compression cylinder 100 is configured with a third vane groove 120, and the compressor also includes a second piston 310 and a third vane 121. The second piston 310 is disposed in the first compression cylinder 100, one end of the third vane 121 is disposed in the third vane groove 120, the third vane 121 is movable relative to the third vane groove 120, and the other end of the third vane 121 abuts against the outer side wall of the second piston 310.

[0048] Exemplarily, the ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 ranges from 1.2 to 1.5.

[0049] In this embodiment, the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 is the total volume of the cavities in the compressor for one-stage compression of the gas, and the volume of the second sub-compression cavity 212 is the volume of the cavity in the compressor for two-stage compression of the gas.

[0050] The sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 is greater than the volume of the second sub-compression cavity 212, and the pressure in the first compression cavity 110 and the first sub-compression cavity 211 is less than the pressure in the second sub-compression cavity 212. In this way, different pressures correspond to different volumes of the compression cylinder, so as to improve the gas displacement of the compressor and the compression efficiency of the compressor. Moreover, the volume of the second sub-compression cavity 212 with a larger pressure is smaller, so as to reduce the gas leakage of the second sub-compression cavity 212, so as to reduce the situation of reducing the heating capacity due to the reduction of the volumetric efficiency. Alternatively, the ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 can be any ratio in the range from 1.2 to 1.5, for example, the ratio is 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, etc., or the ratio can also be 1.23, 1.28, 1.33, 1.38, 1.43, 1.48, etc. The purpose of this embodiment is to increase the displacement of the gas. Due to the influence of the type of refrigerant filled in the compressor and the working condition of the compressor, the ratio can be different under different conditions, as long as it is in the range from 1.2 to 1.5, which is not limited here.

[0051] In the case where the ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 is less than 1.2, the compression efficiency of the compressor is relatively low, the heating capacity increases at a low temperature, and the heating effect of the compressor is poor. In the case where the ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 is greater than 1.5, the pressure difference before and after the compression of the gas is large, the energy consumption of the compressor during compression increases, the efficiency of the compressor decreases, and the grading compression effect of the compressor is reduced. In this embodiment, in the case where the evaporation temperature is -30℃ and the displacement of the gas is increased by 30%, the heating capacity can be increased by 28%.

[0052] Further, the ratio of the volume of the first compression cavity 110 to the volume of the second compression cavity 210 ranges from 0.71 to 1.

[0053] In the embodiment, the volume of the second compression cavity 210 is the sum of the volume of the first sub-compression cavity 211 and the volume of the second sub-compression cavity 212, and the ratio of the volume of the first compression cavity 110 to the volume of the second compression cavity 210 ranges from 0.71 to 1. The specifications of the first compression cylinder 100 and the second compression cylinder 200 are limited to reduce the difference between the volume and the capacity of the first compression cylinder 100 and the second compression cylinder 200, improve the rationality of the volume of the first compression cavity 110 and the volume of the second compression cavity 210, and take into account the ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 to improve the gas displacement and the heating efficiency of the compressor.

[0054] In the embodiment, although the volume of the first compression cavity 110 is less than or equal to the volume of the second compression cavity 210, the second compression cavity 210 is divided into the first sub-compression cavity 211 and the second sub-compression cavity 212, and the first sub-compression cavity 211 compresses the gas in one stage. In this way, the volume of the compression cavity for one-stage compression is increased, and the volume of the compression cavity for two-stage compression in the second compression cavity 210 is reduced. The ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 still ranges from 1.2 to 1.5. Thus, the volume of the compression cavity for one-stage compression can be expanded by 25% to 40% without increasing the volume of the compressor, thereby improving the gas displacement of the compressor and the compression efficiency to improve the heating effect.

[0055] For example, the ratio of the volume of the first compression cavity 110 to the volume of the second compression cavity 210 can be any ratio ranging from 0.71 to 1, such as 0.71, 0.75, 0.8, 0.85, 0.9, 0.95, 1, or the ratio can also be 0.72, 0.73, 0.74, 0.76, 0.77, 0.78, 0.79, 0.81, 0.82, 0.83, 0.84, 0.86, 0.87, 0.88, 0.89, 0.91, 0.92, 0.93, 0.94, 0.96, 0.97, 0.98, 0.99, etc.

[0056] It should be noted that in the embodiment, the volume of the first compression cavity 110 is obtained by the height and the inner diameter of the first compression cylinder 100, and the volume of the second compression cavity 210 is obtained by the height and the inner diameter of the second compression cylinder 200. The height and the inner diameter of the first compression cylinder 100 and the height and the inner diameter of the second compression cylinder 200 are not specifically limited as long as the ratio of the volume of the first compression cavity 110 to the volume of the second compression cavity 210 ranges from 0.71 to 1.

[0057] Exemplarily, along the circumference of the first piston 300, the angle range of the fold angle formed by the first sliding sheet 221 and the second sliding sheet 231 corresponding to the first sub-compression cavity 211 is 150 degrees to 180 degrees.

[0058] In the embodiment, the first sliding sheet 221 and the second sliding sheet 231 divide the second compression cavity 210 into the first sub-compression cavity 211 and the second sub-compression cavity 212, along the circumference of the first piston 300, the angle range of the fold angle formed by the first sliding sheet 221 and the second sliding sheet 231 corresponding to the first sub-compression cavity 211 is 150 degrees to 180 degrees, when the fold angle is less than 180 degrees and greater than or equal to 150 degrees, the volume of the first sub-compression cavity 211 is less than the volume of the second sub-compression cavity 212, when the fold angle is equal to 180 degrees, the volume of the first sub-compression cavity 211 is equal to the volume of the second sub-compression cavity 212. In this way, not only the volume of the compression cavity for one-stage compression can be increased by setting the first sub-compression cavity 211 to improve the gas displacement of the compressor, but also the rationality of the volume setting of the compression cavity for one-stage compression and the compression cavity for two-stage compression can be improved, the gas displacement of the compressor and the compression efficiency of the compressor can be improved by setting the volume of the first sub-compression cavity 211 to be less than or equal to the volume of the second sub-compression cavity 212, and combining the case that the ratio of the volume of the first compression cavity 110 to the volume of the second compression cavity 210 is between 0.71 and 1, so that the ratio of the sum of the volume of the first compression cavity 110 and the volume of the first sub-compression cavity 211 to the volume of the second sub-compression cavity 212 is between 1.2 and 1.5.

[0059] In some optional embodiments, as shown in Figure 1 、 Figure 2 、 Figure 5 and Figure 6 , the compressor further comprises a gas storage cylinder 400, the gas storage cylinder 400 is configured with a gas storage cavity 410, the gas outlet of the first compression cavity 110 is in communication with the gas inlet of the gas storage cavity 410, the gas outlet of the first sub-compression cavity 211 is in communication with the gas inlet of the gas storage cavity 410, and the gas outlet of the gas storage cavity 410 is in communication with the gas inlet of the second sub-compression cavity 212.

[0060] In the embodiment, the compressor further comprises a gas storage cylinder 400 configured with a gas storage cavity 410, the gas outlet of the first compression cavity 110 is communicated with the gas inlet of the gas storage cavity 410, the gas outlet of the first sub-compression cavity 211 is communicated with the gas inlet of the gas storage cavity 410, and the gas outlet of the gas storage cavity 410 is communicated with the gas inlet of the second sub-compression cavity 212. In this way, the gas compressed by the first compression cavity 110 enters the gas storage cavity 410, the gas compressed by the first sub-compression cavity 211 also enters the gas storage cavity 410, and the gas in the gas storage cavity 410 enters the second sub-compression cavity 212 for secondary compression. In this way, the gas storage cavity 410 can be used as an intermediate cavity between the first compression cavity 110 and the second compression cavity 210, and the gas compressed in the first compression cavity 110 and the gas compressed in the first sub-compression cavity 211 are mixed, thereby improving the uniformity of the gas pressure entering the second sub-compression cavity 212.

[0061] Further, along the axial direction of the compressor, the second compression cylinder 200, the first compression cylinder 100 and the gas storage cylinder 400 are sequentially arranged.

[0062] In the embodiment, along the axial direction of the compressor, the second compression cylinder 200, the first compression cylinder 100 and the gas storage cavity 410 are sequentially arranged, so that the crankshaft included in the compressor can sequentially penetrate the first piston 300 in the second compression cylinder 200 and the second piston 310 in the first compression cylinder 100. The torque generated by the gas compression of the first compression cylinder 100 is transmitted to the crankshaft through the second piston 310, and the torque generated by the gas compression of the second compression cylinder 200 is transmitted to the crankshaft through the second piston 310. Compared with the case where the gas storage cylinder 400 is arranged between the first compression cylinder 100 and the second compression cylinder 200, the embodiment can reduce the span between the first compression cylinder 100 and the second compression cylinder 200, thereby reducing the span between the two torques acting on the crankshaft, thereby reducing the stress deformation of the crankshaft and improving the reliability and stability of the crankshaft during use. At the same time, the length of the crankshaft can also be reduced to reduce the situation that the transmission efficiency of the crankshaft is reduced due to the increase of the span of the crankshaft.

[0063] In some optional embodiments, as shown in Figure 4 along the radial direction of the first compression cylinder 100, the cylinder body of the first compression cylinder 100 is configured with an exhaust passage 150 and a gas supply passage 160. The exhaust passage 150 is communicated between the gas outlet of the first sub-compression cavity 211 and the gas inlet of the gas storage cavity 410, and the gas supply passage 160 is communicated between the gas storage port of the gas storage cavity 410 and the gas inlet of the second sub-compression cavity 212.

[0064] In the embodiment, the second compression cylinder 200, the first compression cylinder 100 and the gas storage cylinder 400 are arranged in sequence, the first sub-compression cylinder and the second sub-compression cylinder of the second compression cylinder 200 exchange gas with the gas storage cylinder 400 respectively, the cylinder body of the first compression cylinder 100 is configured with the exhaust passage 150 communicated between the first sub-compression cavity 211 and the gas storage cavity 410 and the gas supply passage 160 communicated between the gas storage cavity 410 and the second sub-compression cavity 212, so that the gas in the first sub-compression cavity 211 can enter the gas storage cavity 410 through the exhaust passage 150, and the mixed gas after the first-stage compression in the gas storage cavity 410 can enter the second sub-compression cavity 212 through the exhaust passage 150, so that the gas can flow in the multiple compression cavities, and the operation reliability and stability of the compressor are improved.

[0065] Optionally, the diameter of the second compression cavity 210 is greater than the diameter of the first compression cavity 110, and the diameter of the circle at the position of the gas outlet of the first sub-compression cavity 211 is greater than the diameter of the first compression cavity 110, and / or the diameter of the circle at the position of the gas inlet of the second sub-compression cavity 212 is greater than the diameter of the first compression cavity 110. In this way, the circle at the position of the gas outlet of the first sub-compression cavity 211 corresponds to the cylinder body of the first compression cavity 110, and the cylinder body of the first compression cavity 110 is configured with the exhaust passage 150 corresponding to the gas outlet of the first sub-compression cavity 211. The circle at the position of the gas inlet of the second sub-compression cavity 212 corresponds to the cylinder body of the first compression cavity 110, and the cylinder body of the first compression cavity 110 is configured with the gas supply passage 160 corresponding to the gas inlet of the second sub-compression cavity 212.

[0066] In addition, when the ratio of the volume of the first compression cavity 110 to the volume of the second compression cavity 210 ranges from 0.71 to 1 in the embodiment, the diameter of the second compression cavity 210 can be greater than the diameter of the first compression cavity 110. In this way, the exhaust passage 150 and the gas supply passage 160 are configured on the cylinder body of the first compression cylinder 100, so that the structural components of the compressor can be reduced, and the production cost of the compressor can be reduced.

[0067] Optionally, as shown in Figure 2 The compressor further comprises a partition plate 500 arranged between the first compression cylinder 100 and the second compression cylinder 200, and the partition plate 500 is used to separate the first compression cavity 110 and the second compression cavity 210.

[0068] Further, the partition 500 is configured with a gas supply cavity and a gas exhaust cavity, one end of the gas exhaust cavity is communicated with the gas exhaust passage 150, the other end of the gas exhaust cavity is communicated with the gas outlet of the first sub-compression cavity 211, and the gas exhaust cavity extends along the radial direction of the compressor. In this way, when the diameter of the first compression cavity 110 is greater than or equal to the diameter of the circle where the gas outlet of the first sub-compression cavity 211 is located, the gas exhaust cavity can guide the gas exhausted from the first sub-compression cavity 211 to flow to the gas exhaust passage 150 at the cylinder body of the first compression cylinder 100, so as to flow into the gas storage cavity 410 through the gas exhaust passage 150.

[0069] One end of the gas supply cavity is communicated with the gas supply passage 160, and the other end of the gas supply cavity is communicated with the gas inlet of the second sub-compression cavity 212. The gas supply cavity extends along the radial direction of the compressor. In this way, when the diameter of the first compression cavity 110 is greater than or equal to the diameter of the circle where the gas inlet of the second sub-compression cavity 212 is located, the gas supply cavity can guide the gas flowed out of the gas supply passage 160 of the cylinder body of the first compression cylinder 100 to flow to the gas inlet of the second sub-compression cavity 212, so as to make the gas enter the second sub-compression cavity 212 for secondary compression.

[0070] Figure 5 An alternative embodiment of the gas flow in the present embodiment is shown, in which the solid arrows are the flow directions of the gas flowing into the compressor and then flowing into the first compression cavity 110, and the dashed arrows are the flow directions of the gas flowing into the compressor and then flowing into the first sub-compression cavity 211. Figure 2 and Figure 5 As shown in FIGS. 5 and 6, the first compression cylinder 100 is further configured with a main gas inlet passage 130 and a first auxiliary gas inlet passage 140, the main gas inlet passage 130 is communicated with the gas inlet of the first compression cavity 110, one end of the first auxiliary gas inlet passage 140 is communicated with the main gas inlet passage 130, and the other end of the first auxiliary gas inlet passage 140 is communicated with the gas inlet of the first sub-compression cavity 211. Further, the partition 500 is further configured with a second auxiliary gas inlet passage 510, which is communicated between the other end of the first auxiliary gas inlet passage 140 and the gas inlet of the first sub-compression cavity 211.

[0071] Figure 6 Another alternative embodiment of the gas flow in the present embodiment is shown, in which the solid arrows are the flow directions of the gas after being compressed in the first compression cavity 110 and the first sub-compression cavity 211, and the dashed arrows are the flow directions of the gas in the flash tank flowing into the gas supply cavity 410 through the gas supply passage 420.

[0072] Further, as shown in FIGS. 5 and 6, Figure 1 , Figure 2 and Figure 6As shown, the compressor further comprises a gas supplement pipe 420, and an outlet of the gas supplement pipe 420 is communicated with the gas supplement port of the gas storage cavity 410.

[0073] In this embodiment, the outlet of the gas supplement pipe 420 is communicated with the gas supplement port of the gas storage cavity 410, and the inlet of the gas supplement pipe 420 is communicated with a flash tank of the refrigeration system. In this way, the gas supplement pipe 420 can deliver saturated gas in the flash tank to the gas storage cavity 410, and the gas storage cavity 410 mixes the gas delivered by the gas supplement pipe 420, the gas compressed by the first sub-compression cavity 211 and the gas compressed by the first compression cavity 110, so as to increase the gas displacement of the compressor and improve the heating capacity.

[0074] The embodiment of the present disclosure provides a refrigeration system, which comprises the compressor according to any one of the above embodiments.

[0075] The refrigeration system provided by the embodiment of the present disclosure comprises the compressor according to any one of the above embodiments, and thus has all the beneficial effects of the compressor according to any one of the above embodiments, which will not be described herein again.

[0076] The above description and drawings sufficiently show the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural and other changes. The embodiments are merely representative of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included in or replace parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A compressor, characterized in that, include: The first compression cylinder has a first compression chamber; The second compression cylinder is constructed with a first sub-compression chamber and a second sub-compression chamber; The outlet of the first compression chamber is connected to the inlet of the second sub-compression chamber, and the outlet of the first sub-compression chamber is connected to the inlet of the second sub-compression chamber. The gas compressed in the first compression chamber and the gas compressed in the first sub-compression chamber can enter the second sub-compression chamber for secondary compression. The second compression cylinder has a second compression chamber, a first sliding vane groove and a second sliding vane groove, and the first sliding vane groove and the second sliding vane groove are respectively connected to the second compression chamber; The compressor also includes: The piston is located inside the second compression cylinder; The first sliding plate has one end located in the first sliding plate groove and is movable relative to the first sliding plate groove. The other end of the first sliding plate abuts against the first position of the outer side wall of the piston. The second slide plate has one end located in the second slide plate groove and can move relative to the second slide plate groove. The other end of the second slide plate abuts against the second position of the outer side wall of the piston. The first and second sliding plates divide the second compression chamber into the first sub-compression chamber and the second sub-compression chamber. The ratio of the volume of the first compression chamber to the volume of the second compression chamber is in the range of 0.71 to 1; The ratio of the sum of the volumes of the first compression chamber and the first sub-compression chamber to the volume of the second sub-compression chamber is between 1.2 and 1.

5.

2. The compressor according to claim 1, characterized in that, Along the circumference of the piston, the angle between the first and second sliding vanes corresponding to the first sub-compression chamber ranges from 150 degrees to 180 degrees.

3. The compressor according to claim 1 or 2, characterized in that, Also includes: The air storage cylinder is constructed with an air storage chamber. The outlet of the first compression chamber is connected to the inlet of the air storage chamber, the outlet of the first sub-compression chamber is connected to the inlet of the air storage chamber, and the outlet of the air storage chamber is connected to the inlet of the second sub-compression chamber.

4. The compressor according to claim 3, characterized in that, Along the axial direction of the compressor, the second compression cylinder, the first compression cylinder, and the air storage cylinder are arranged in sequence.

5. The compressor according to claim 4, characterized in that, Along the radial direction of the first compression cylinder, the cylinder body of the first compression cylinder is constructed with an exhaust passage and an air supply passage. The exhaust passage connects the air outlet of the first sub-compression chamber and the air inlet of the storage chamber, and the air supply passage connects the air storage port of the storage chamber and the air inlet of the second sub-compression chamber.

6. The compressor according to claim 3, characterized in that, Also includes: The air supply tube has its outlet connected to the air supply port of the air storage chamber.

7. A refrigeration system, characterized in that, include: The compressor as described in any one of claims 1 to 6.

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