Three-cylinder pump body assembly, three-cylinder compressor, refrigeration system, refrigerator

Abstract

The application provides a three-cylinder pump body assembly, a three-cylinder compressor, a refrigeration system and a refrigerator, wherein the three-cylinder pump body assembly has a rotor compression part, a first piston compression part and a second piston compression part; the first piston compression part can suck refrigerant in a circulating pipeline outside into it for primary compression; the refrigerant after the primary compression is discharged into an inner cavity of a corresponding compressor; the second piston compression part can suck the refrigerant in the inner cavity into it for secondary compression; the refrigerant after the secondary compression can be sucked into the rotor compression part for tertiary compression and then be discharged into the circulating pipeline. The application can effectively improve the back pressure of the compressor, reduce the compression ratio of each compression part, improve the compression efficiency and refrigeration capacity of the compressor, meet the deep freezing working condition requirement of the refrigerator and has a strong application prospect in large refrigeration equipment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of compressor design, and particularly relates to a three-cylinder pump body assembly, a three-cylinder compressor, a refrigeration system and a refrigerator. BACKGROUND

[0002] The existing rotor type compressor technology and piston type compressor technology are relatively mature, but due to the limitation of their own structures, the piston compressor has super high reliability and relatively high energy efficiency ratio under the condition of large compression ratio and low temperature, and the rotor compressor has relatively high performance under the condition of high flow.

[0003] In recent years, people's demand for large refrigeration capacity and deep freezing of refrigerators is increasing, and larger refrigeration capacity and lower temperature play a more critical role in the long-term preservation of physical objects. However, the refrigeration capacity of the existing small single-cylinder reciprocating refrigeration compressor is difficult to reach a higher level, and the single-cylinder compressor compresses the return gas of the evaporator so that the high-pressure gas obtained after compression of the compressor enters the condenser. The existing single-cylinder single-stage compressor technology applied to the deep freezing condition has low evaporator evaporation temperature and low compressor return gas pressure, which increases the compression ratio of the compressor, reduces the volumetric efficiency, and also reduces the energy efficiency ratio. SUMMARY

[0004] Therefore, the present application provides a three-cylinder pump body assembly, a three-cylinder compressor, a refrigeration system and a refrigerator, which can solve the technical problems of low compression ratio, low volumetric efficiency and low energy efficiency ratio of the single-cylinder compressor in the prior art.

[0005] In order to solve the above problems, the present application provides a three-cylinder pump body assembly, which has:

[0006] The rotor compression part, the first piston compression part and the second piston compression part, the first piston compression part can suck the refrigerant in the external circulation pipeline into it for one-stage compression, the refrigerant compressed by one-stage compression is discharged to the inner cavity of the corresponding compressor, the second piston compression part can suck the refrigerant in the inner cavity into it for two-stage compression, the refrigerant compressed by two-stage compression can be sucked into the rotor compression part for three-stage compression, and then discharged to the circulation pipeline.

[0007] In some embodiments,

[0008] The straight-line reciprocating motion of the sliding vane of the rotor compression part can drive the straight-line reciprocating motion of the first piston of the first piston compression part and the second piston of the second piston compression part.

[0009] In some embodiments,

[0010] The rotor compression part comprises a rotor, a first end of the sliding vane is hinged to the rotor, a second end of the sliding vane is formed with a first inclined surface corresponding to the first piston and a second inclined surface corresponding to the second piston, a first end of the first piston is connected to a first end of a first connecting rod, a first end of the second piston is connected to a first end of a second connecting rod, a second end of the first connecting rod is slidingly connected to the first inclined surface, and a second end of the second connecting rod is slidingly connected to the second inclined surface.

[0011] In some embodiments,

[0012] The first inclined surface has a first sliding groove, the second inclined surface has a second sliding groove, the first sliding groove and the second sliding groove extend from the first end to the second end of the sliding vane, the second end of the first connecting rod slidingly locates in the first sliding groove, and the second end of the second connecting rod slidingly locates in the second sliding groove.

[0013] In some embodiments,

[0014] The second ends of the first connecting rod and the second connecting rod are formed with anti-disengagement structures, and the anti-disengagement structures are located in the first sliding groove or the second sliding groove.

[0015] In some embodiments,

[0016] The three-cylinder pump body assembly further comprises a cylinder seat, the cylinder seat comprises a cylinder seat body, the cylinder seat body is formed with a first cylinder hole corresponding to the rotor compression part, a second cylinder hole corresponding to the first piston compression part, and a third cylinder hole corresponding to the second piston compression part, the first cylinder hole penetrates through a first side surface and a second side surface of the cylinder seat body along an axial direction of the first cylinder hole, a sliding vane groove is formed on a hole wall of the first cylinder hole, the sliding vane slidingly locates in the sliding vane groove, and the second cylinder hole and the third cylinder hole are respectively formed on opposite two side groove walls of the sliding vane groove.

[0017] In some embodiments,

[0018] An air suction channel is further formed in the cylinder seat body, one end of the air suction channel is communicated with an air suction port of the first cylinder hole, and the other end of the air suction channel is communicated with an exhaust cavity of a cylinder head assembly corresponding to the second piston compression part.

[0019] In some embodiments,

[0020] The second cylinder hole and the third cylinder hole are coaxially arranged, a central axis of the second cylinder hole is parallel to the first side surface and perpendicular to a central axis of the first cylinder hole, and / or the first inclined surface and the second inclined surface are mirror arranged.

[0021] The application further provides a three-cylinder compressor, comprising a shell and a three-cylinder pump body assembly arranged in the inner cavity of the shell, wherein the three-cylinder pump body assembly is the three-cylinder pump body assembly described above.

[0022] In some embodiments, the shell is provided with a first suction pipe in communication with the inner cavity, a second suction pipe in communication with the suction port of the first piston compression part, and an exhaust pipe in communication with the exhaust port of the rotor compression part.

[0023] The application further provides a refrigeration system, comprising the three-cylinder compressor described above, and further comprising a refrigeration evaporator, a freezing evaporator, a condenser, a first throttling element, and a second throttling element, wherein the inlet of the condenser is connected with the exhaust pipe, the outlet of the condenser is connected with the inlets of the refrigeration evaporator and the freezing evaporator at a first point, the first throttling element is connected in series on the pipeline between the first point and the outlet of the condenser, the second throttling element is connected in series on the pipeline between the first point and the inlet of the freezing evaporator, the refrigeration evaporator is connected with the first suction pipe, and the outlet of the freezing evaporator is connected with the second suction pipe.

[0024] The application further provides a refrigerator, comprising the refrigeration system described above.

[0025] The three-cylinder pump body assembly, the three-cylinder compressor, the refrigeration system, and the refrigerator provided by the application have the following beneficial effects:

[0026] The three-stage compression of the refrigerant through the first piston compression part, the second piston compression part, and the rotor compression part in sequence can effectively improve the back pressure of the compressor, reduce the compression ratio of each compression part, improve the compression efficiency and refrigeration capacity of the compressor, meet the deep freezing working condition requirement of the refrigerator, and have a strong application prospect in large refrigeration equipment; at the same time, compared with the three-cylinder rotor compressor commonly used in the industry, the compressor of the application adopts a piston-rotor combined compression structure, and the overall structure is more compact, which is particularly suitable for the case where the installation space is limited, such as a refrigerator. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be derived from the provided drawings without creative labor.

[0028] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the application, should still fall within the scope covered by the disclosed technology.

[0029] Figure 1 It is a schematic diagram of the exploded structure of the three-cylinder pump body assembly of the embodiment of the application.

[0030] Figure 2 It is a schematic diagram of the three-cylinder pump body assembly in Figure 1 after omitting the upper and lower flanges corresponding to the rotor compression part and the cylinder head assembly corresponding to the piston compression part and other components;

[0031] Figure 3 It is a schematic diagram of the cross section of Figure 2 , which shows the relative relationship between the rotor and the vane;

[0032] Figure 4 It is a partial cross-sectional view of Figure 2 , which shows the relative relationship between the vane and the two pistons;

[0033] Figure 5 It is a schematic diagram of the three-dimensional structure of the two pistons, rotor and vane in Figure 2 after assembly;

[0034] Figure 6 It is a partial enlarged view of A in Figure 5 ;

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the vane in Figure 2 ;

[0036] Figure 8 It is a schematic diagram of the three-dimensional structure of the cylinder seat in Figure 2 ;

[0037] Figure 9 It is a schematic diagram of the three-dimensional structure of Figure 8 from the bottom view;

[0038] Figure 10 It is a cross-sectional schematic diagram of Figure 9 ;

[0039] Figure 11 It is a schematic diagram of the exploded structure of the three-cylinder compressor of the embodiment of the application (omitting the upper part of the shell);

[0040] Figure 12Fig. 2 is a top view (upper part of the shell is omitted) of a three-cylinder compressor according to an embodiment of the present application;

[0041] Figure 13 Fig. 4 is a schematic diagram of a refrigeration system according to an embodiment of the present application, in which arrows show the flow direction of refrigerant and air.

[0042] Reference signs are shown as follows:

[0043] 11, sliding vane; 111, first inclined surface; 112, second inclined surface; 113, first sliding groove;

[0044] 114, second sliding groove; 115, hinge joint; 12, rotor; 21, first piston; 22, first connecting rod; 23, anti-disengagement structure; 31, second piston; 32, second connecting rod; 4, cylinder block body; 401, first cylinder bore; 4011, suction passage; 4012, exhaust gap; 402, second cylinder bore; 403, third cylinder bore; 42, sliding vane groove; 431, first sound-damping cavity; 432, second sound-damping cavity; 441, first connecting hole; 442, second connecting hole; 451, first exhaust communication hole; 452, second exhaust communication hole; 461, open sound-damping cover; 462, sealing sound-damping cover; 501, cylinder head assembly; 502, shell; 503, three-cylinder pump body assembly; 504, first suction pipe; 505, second suction pipe; 506, exhaust pipe; 507, motor assembly; 5081, upper flange; 5082, lower flange; 6, crankshaft assembly; 701, refrigeration evaporator; 702, freezing evaporator; 703, condenser; 704, first throttling element; 705, second throttling element. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not intended to limit the present application and its application or use in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0046] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a presence of a feature, step, operation, device, component and / or combination thereof.

[0047] It should be understood that the term "and / or" as used herein merely describes associated objects in an associated manner, and can represent three conditions, for example, A and / or B can represent three conditions of A alone, A and B, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0048] The relative arrangement of the components and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. The technology, methods and equipment known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the authorized description. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0049] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship generally based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, without the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0050] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0051] In addition, it should be noted that the use of the terms "first", "second", etc. to define components is merely for the convenience of distinguishing the corresponding components, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0052] With reference to the accompanying drawings Figures 1 to 13 As shown, according to an embodiment of the present application, a three-cylinder pump body assembly is provided, which has:

[0053] A rotor compression part (not labeled in the figure), a first piston compression part (not labeled in the figure) and a second piston compression part (not labeled in the figure), the first piston compression part is capable of sucking the refrigerant in the external circulation pipeline (for example Figure 13 The refrigerant in the refrigeration system shown in the related refrigerant circulation pipeline) into it for primary compression, the primary compressed refrigerant is discharged to the inner cavity of the corresponding compressor (that is, the accommodation space in the compressor shell 502), the second piston compression part is capable of sucking the refrigerant in the inner cavity into it for secondary compression, the secondary compressed refrigerant can be sucked by the rotor compression part and compressed for three times, and then discharged to the circulation pipeline after three times compression.

[0054] In this technical solution, the refrigerant is sequentially compressed by the first piston compression part, the second piston compression part and the rotor compression part, which can effectively improve the back pressure of the compressor, reduce the compression ratio of each compression part, improve the compression efficiency and refrigeration capacity of the compressor, meet the deep freezing working condition requirement of the refrigerator, and has strong application prospect on large refrigeration equipment. At the same time, compared with the three-cylinder rotor compressor commonly used in the industry, the compressor of the present application adopts a piston and rotor combined compression structure, and the overall structure is more compact, especially suitable for limited installation space such as refrigerators. It should be particularly noted that the refrigerant sucked into the inner cavity by the second piston compression part includes not only the refrigerant compressed by the first piston compression part, but also the relatively high-temperature medium-pressure refrigerant introduced from the circulation pipeline, that is, the two parts of refrigerant can be compressed in the second piston compression part and then enter the rotor compression part, fully utilizing the large compression ratio of the piston compression part and the high performance characteristics of the rotor compression part under high flow, and the performance of the entire compressor is further improved.

[0055] In a preferred embodiment, the straight reciprocating motion of the sliding vane 11 of the rotor compression part can drive the straight reciprocating motion of the first piston 21 of the first piston compression part and the second piston 31 of the second piston compression part, and it can be understood that the rotor compression part further comprises a rotor 12 sleeved on the eccentric part of the crankshaft assembly 6, the crankshaft assembly 6 is driven to rotate by the motor assembly 507 and in turn drives the translation (i.e. swing) of the rotor 12, the translated rotor 12 can act on the sliding vane 11 to drive the straight reciprocating motion of the sliding vane 11, and the sliding vane 11 further acts on the first piston 21 and the second piston 31, so as to realize the driving of the rotor compression part and the driving of the two piston compression parts by one set of motor assembly, and the structure is simple and compact.

[0056] As described above, the rotor compression part comprises a rotor 12, the first end of the sliding vane 11 is hinged to the rotor 12 (specifically through a hinge 115 arranged at the first end of the sliding vane 11), the second end of the sliding vane 11 is formed with a first inclined surface 111 corresponding to the first piston 21 and a second inclined surface 112 corresponding to the second piston 31, the first end of the first piston 21 is connected to the first end of the first connecting rod 22, the first end of the second piston 31 is connected to the first end of the second connecting rod 32, the second end of the first connecting rod 22 is slidingly connected to the first inclined surface 111, and the second end of the second connecting rod 32 is slidingly connected to the second inclined surface 112.

[0057] In this technical solution, the first inclined surface 111 and the second inclined surface 112 are arranged at the second end of the sliding vane 11, the height difference of the inclined surfaces is converted into the force applied to the pistons, the structure design is novel and can further simplify the structure design of the compressor. The inclination of the first inclined surface 111 and the second inclined surface 112 can be reasonably selected according to the compression ratio and the compression stroke of the corresponding piston compression part.

[0058] In order to ensure the stability of the reciprocating motion of the first connecting rod 22 and the second connecting rod 32, in a preferred embodiment, the first inclined surface 111 has a first sliding groove 113, the second inclined surface 112 has a second sliding groove 114, the first sliding groove 113 and the second sliding groove 114 extend from the first end to the second end of the sliding vane 11, the second end of the first connecting rod 22 slides in the first sliding groove 113, and the second end of the second connecting rod 32 slides in the second sliding groove 114, that is, the second end of the first connecting rod 22 is reliably limited by the first sliding groove 113, and the second end of the second connecting rod 32 is reliably limited by the second sliding groove 114, so as to ensure the stability and reliability of the reciprocating compression process of the pistons.

[0059] In one embodiment, the first inclined surface 111 and the second inclined surface 112 described above can be used only for force application to the compression stroke of the corresponding piston, and the suction stroke of the piston can be achieved by setting other structures, such as a reset spring in the cylinder, etc. In a more preferred embodiment, the second end of the first connecting rod 22 and the second connecting rod 32 is formed with an anti-disengagement structure 23, which is located in the first sliding groove 113 or the second sliding groove 114. It can be understood that the notches of the first sliding groove 113 and the second sliding groove 114 are respectively provided with a closed opening to limit the anti-disengagement structure 23 from disengaging from the groove. The anti-disengagement structure 23 described above can be, for example, a spherical end. In this technical solution, the second end of the first connecting rod 22 and the second connecting rod 32 is respectively slidably connected in the corresponding sliding groove through the anti-disengagement structure 23, so that the linear reciprocating motion of the sliding sheet 11 can be used to both compress and exhaust the refrigerant in the piston compression part and to suck the refrigerant in the piston compression part.

[0060] For a more complete understanding of the present application, reference is made to the following detailed description taken in conjunction with the accompanying drawings in which: Figures 8 to 10 As shown in some embodiments, the three-cylinder compressor further comprises a cylinder seat, which comprises a cylinder seat body 4, the cylinder seat body 4 is formed with a first cylinder hole 401 corresponding to the rotor compression part, a second cylinder hole 402 corresponding to the first piston compression part, and a third cylinder hole 403 corresponding to the second piston compression part. The first cylinder hole 401 penetrates the first side and the second side of the cylinder seat body 4 along its axial direction, and the sliding sheet groove 42 is formed on the hole wall of the first cylinder hole 401, and the sliding sheet 11 slides in the sliding sheet groove 42. The second cylinder hole 402 and the third cylinder hole 403 are respectively formed on the opposite two side groove walls of the sliding sheet groove 42. It can be understood that the first side and the second side of the first cylinder hole 401 are connected with end flanges (i.e. upper flange 5081 and lower flange 5082) corresponding to the part of the area, and the corresponding cylinder head assembly 501 is provided corresponding to the second cylinder hole 402 and the third cylinder hole 403. The cylinder head assembly can adopt the cylinder head assembly known in the industry, i.e. it has a suction valve plate and an exhaust valve plate and other related structures. Specifically, the sliding sheet groove 42 penetrates the first side and the second side, thereby facilitating the assembly of the sliding sheet 11 and the corresponding components. It should be noted that the sliding sheet groove 42 includes a sealing sliding section corresponding to the first cylinder hole 401 and a driving sliding section corresponding to the second cylinder hole 402 and the third cylinder hole 403.

[0061] In the technical scheme, the first cylinder hole 401, the second cylinder hole 402 and the third cylinder hole 403 are arranged on the cylinder base body 4, so that the three compression units in the three-cylinder pump body assembly can be arranged on one component, the structure of the pump body assembly is simplified, the structure of the pump body assembly is more compact, the component volume is reduced, and the excessive occupation of the compressor installation space is reduced.

[0062] In some embodiments,

[0063] The cylinder base body 4 is also provided with an air suction passage 4011, one end of the air suction passage 4011 is communicated with the air suction port of the first cylinder hole 401, and the other end is communicated with the exhaust cavity of the cylinder head assembly 501 corresponding to the second piston compression unit.

[0064] In the technical scheme, the air suction passage 4011 is directly arranged in the cylinder base body 4, which can simplify the structure design, and is preferably arranged in a straight line, thereby reducing the air suction flow resistance loss of the rotor compression unit.

[0065] Specifically referring to Figure 8 As shown in the preferred embodiment, the first side surface of the cylinder base body 4 is provided with a first sound attenuation cavity 431 and a second sound attenuation cavity 432, wherein the exhaust of the first sound attenuation cavity 431 is communicated with the inner cavity (i.e. the shell cavity), and the exhaust of the second sound attenuation cavity 432 is communicated with the air suction passage 4011 (i.e. the air suction of the rotor compression unit), so that the exhaust noise of the two piston compression units is reduced. The exhaust refrigerant in the sound attenuation cavity can also form a buffer and flow regulation, which is also beneficial to reduce the air suction noise of the rotor compression unit. Referring to Figure 8 As shown, the first sound attenuation cavity 431 is connected with an open sound attenuation cover 461 (the opening is the exhaust hole), and the second sound attenuation cavity 432 is connected with a non-sealed sound attenuation cover 462 for sealing the sound attenuation cavity. The two sound attenuation covers can be respectively screwed to the corresponding port of the corresponding sound attenuation cavity.

[0066] The second cylinder hole 402 and the third cylinder hole 403 are coaxially arranged, the central axis of the second cylinder hole 402 is parallel to the first side surface and perpendicular to the central axis of the first cylinder hole 401 (i.e. at this time, the first cylinder hole 401, the second cylinder hole 402 and the third cylinder hole 403 are all cylindrical holes), so that the height of the two piston compression units and the rotor compression unit can be effectively reduced, and the overall structure of the compressor can be more compact, which is especially suitable for the working condition with limited installation height space.

[0067] In a preferred embodiment, the first inclined surface 111 is mirror-symmetrically arranged with the second inclined surface 112, specifically, the first inclined surface 111 is symmetric about the center symmetry plane of the sliding vane groove 42, and thus the first piston compression part and the second piston compression part are also symmetric about the center symmetry plane, the force balance of the whole machine is better, and the vibration of the pump body assembly caused by unbalanced force can be reduced.

[0068] In some embodiments, the second cylinder bore 402 and the third cylinder bore 403 are both through holes penetrating the outer side wall of the cylinder block body 4, the outer side wall of the cylinder block body 4 having the second cylinder bore 402 or the third cylinder bore 403 has a plurality of first connecting holes 441 for connecting the aforementioned cylinder head assembly and arranged around the second cylinder bore 402 or the third cylinder bore 403; and / or, the first side and the second side are also configured with second connecting holes 442 for connecting the aforementioned end flanges. The aforementioned first connecting holes 441 and second connecting holes 442 can be through holes or threaded holes.

[0069] In a preferred embodiment, the cylinder block body 4 is also configured with a first exhaust communication hole 451 for communicating the exhaust cavity of the cylinder head assembly with the first silencing cavity 431, and a second exhaust communication hole 452 for communicating the exhaust cavity of the cylinder head assembly with the second silencing cavity 432, specifically, the aforementioned first exhaust communication hole 451 and the second exhaust communication hole 452 are both linearly extending through holes, and the specific arrangement position thereof corresponds to the exhaust cavity (where the exhaust valve plate is located) in the aforementioned corresponding cylinder head assembly.

[0070] According to the embodiments of the present application, specifically referring to Figure 11 and Figure 12 A three-cylinder compressor is also provided, which comprises a shell 502 and a three-cylinder pump body assembly 503 arranged in the inner cavity of the shell 502, the three-cylinder pump body assembly 503 being the three-cylinder pump body assembly described above, specifically, the shell 502 has a first suction pipe 504 communicating with the inner cavity, a second suction pipe 505 communicating with the suction port of the first piston compression part, and an exhaust pipe 506 communicating with the exhaust port of the rotor compression part. In this technical solution, the first suction pipe 504 and the second suction pipe 505 realize the respective communication with the inner cavity and the first piston compression part, and thus the different pressure ratios of the different pressure refrigerants in the external circulation pipeline can be compressed, and the performance of the compressor is improved.

[0071] According to the embodiments of the present application, specifically referring to Figure 13As shown, the application also provides a refrigeration system comprising the three-cylinder compressor, and further comprising a refrigeration evaporator 701, a freezing evaporator 702, a condenser 703, a first throttling element 704, and a second throttling element 705, wherein the outlet of the condenser 703 is connected with the exhaust pipe 506, the outlet of the condenser 703 is connected with the inlet of the refrigeration evaporator 701 and the freezing evaporator 702 at a first point, the first throttling element 704 is connected in series in the pipeline between the first point and the outlet of the condenser 703, the second throttling element 705 is connected in series in the pipeline between the first point and the inlet of the freezing evaporator 702, the refrigeration evaporator 701 is connected with the first suction pipe 504, and the outlet of the freezing evaporator 702 is connected with the second suction pipe 505. In the technical scheme, the low-temperature and low-pressure refrigerant from the freezing evaporator 702 is first introduced into the first piston compression part for compression, and then the medium-temperature and medium-pressure refrigerant from the refrigeration evaporator 701 is combined, so that the pressure of the refrigerant in the inner cavity is relatively high, which is beneficial to improving the suction amount of the second piston compression part, and under the three-stage compression of the rotor compression part, large refrigeration capacity is realized, so that the refrigeration system of the application is especially suitable for deep freezing working conditions and meets the low-temperature refrigeration demand.

[0072] According to the embodiments of the application, a refrigerator is also provided, comprising the refrigeration system.

[0073] The above only describes the preferred embodiments of the application and should not be used to limit the application. Any modification, equivalent replacement, and improvement within the spirit and principle of the application should be included in the protection scope of the application. The above only describes the preferred embodiments of the application and should not be used to limit the application. Any modification, equivalent replacement, and improvement within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A three-cylinder pump body assembly, characterized in that, have: The compressor includes a rotor compressor, a first piston compressor, and a second piston compressor. The first piston compressor can draw refrigerant from the external circulation pipeline into it for primary compression. The refrigerant after primary compression is discharged into the inner cavity of the corresponding compressor. The second piston compressor can draw refrigerant from the inner cavity into it for secondary compression. The refrigerant after secondary compression can be drawn into the rotor compressor for tertiary compression and discharged into the circulation pipeline after tertiary compression. The linear reciprocating motion of the slide (11) of the rotor compression section can drive the linear reciprocating motion of the first piston (21) of the first piston compression section and the second piston (31) of the second piston compression section; the rotor compression section includes a rotor (12), the first end of the slide (11) is hinged to the rotor (12), the second end of the slide (11) forms a first inclined surface (111) corresponding to the first piston (21) and a second inclined surface (112) corresponding to the second piston (31), the first end of the first piston (21) is connected to the first end of the first connecting rod (22), the first end of the second piston (31) is connected to the first end of the second connecting rod (32), the second end of the first connecting rod (22) is slidably connected to the first inclined surface (111), and the second end of the second connecting rod (32) is slidably connected to the second inclined surface (112).

2. The three-cylinder pump body assembly according to claim 1, characterized in that, The first inclined surface (111) has a first groove (113), and the second inclined surface (112) has a second groove (114). The first groove (113) and the second groove (114) extend from the first end of the slide plate (11) to its second end. The second end of the first connecting rod (22) slides in the first groove (113), and the second end of the second connecting rod (32) slides in the second groove (114).

3. The three-cylinder pump body assembly according to claim 2, characterized in that, The second ends of the first connecting rod (22) and the second connecting rod (32) are provided with anti-detachment structures (23), which are located in the first groove (113) or the second groove (114).

4. The three-cylinder pump body assembly according to any one of claims 1 to 3, characterized in that, It also includes a cylinder seat, which includes a cylinder seat body (4). The cylinder seat body (4) has a first cylinder hole (401) corresponding to the rotor compression part, a second cylinder hole (402) corresponding to the first piston compression part, and a third cylinder hole (403) corresponding to the second piston compression part. The first cylinder hole (401) passes through the first side and the second side of the cylinder seat body (4) along its axial direction. A sliding vane groove (42) is constructed on the hole wall of the first cylinder hole (401). The sliding vane (11) slides in the sliding vane groove (42). The second cylinder hole (402) and the third cylinder hole (403) are respectively constructed on the opposite side groove walls of the sliding vane groove (42).

5. The three-cylinder pump body assembly according to claim 4, characterized in that, The cylinder seat body (4) is also provided with an intake channel (4011), one end of which is connected to the intake port of the first cylinder bore (401), and the other end is connected to the exhaust chamber of the cylinder head assembly (501) corresponding to the second piston compression section.

6. The three-cylinder pump body assembly according to claim 5, characterized in that, The second cylinder bore (402) is coaxially arranged with the third cylinder bore (403), the central axis of the second cylinder bore (402) is parallel to the first side and perpendicular to the central axis of the first cylinder bore (401); and / or, the first inclined surface (111) is mirrored with the second inclined surface (112).

7. A three-cylinder compressor, comprising a housing (502) and a three-cylinder pump assembly (503) disposed within the inner cavity of the housing (502), characterized in that, The three-cylinder pump body assembly (503) is the three-cylinder pump body assembly according to any one of claims 1 to 6.

8. The three-cylinder compressor according to claim 7, characterized in that, The outer casing (502) has a first intake pipe (504) communicating with the inner cavity, a second intake pipe (505) communicating with the intake port of the first piston compression section, and an exhaust pipe (506) communicating with the exhaust port of the rotor compression section.

9. A refrigeration system, characterized in that, The compressor includes the three-cylinder compressor of claim 8, and further includes a refrigerated evaporator (701), a frozen evaporator (702), a condenser (703), a first throttling element (704), and a second throttling element (705). The inlet of the condenser (703) is connected to the exhaust pipe (506), and the outlet of the condenser (703) is connected to the inlets of the refrigerated evaporator (701) and the frozen evaporator (702) at a first point. The first throttling element (704) is connected in series on the pipe between the first point and the outlet of the condenser (703). The second throttling element (705) is connected in series on the pipe between the first point and the inlet of the frozen evaporator (702). The refrigerated evaporator (701) is connected to the first suction pipe (504), and the outlet of the frozen evaporator (702) is connected to the second suction pipe (505).

10. A refrigerator, characterized in that, Includes the refrigeration system as described in claim 9.

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