Cylinder block, pump body assembly, compressor and refrigeration system having the same, refrigerator

Abstract

This invention provides a cylinder seat, a pump body assembly, a compressor, and a refrigeration system and refrigerator having the same. The cylinder seat includes a cylinder seat body with a first cylinder bore, a second cylinder bore, and a third cylinder bore formed thereon. The first cylinder bore axially penetrates a first side surface and a second side surface of the cylinder seat body. The second and third cylinder bores are circular holes constructed on the sidewalls of the cylinder seat body, and a vane groove is formed between the bottom of each circular hole and the rotor compression chamber. Each vane groove is used to slidably connect a first vane and a second vane. This invention enables a more compact structure for the pump body assembly and the three-cylinder compressor using the same, reducing component volume and thus minimizing the space occupied in the compressor installation.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically relating to a cylinder base, pump assembly, compressor, and refrigeration system and refrigerator having the same. Background Technology

[0002] In recent years, on the one hand, with the increase in people's income level, people's demand for multi-functional refrigerators has been increasing, such as independent temperature control, odor prevention, deep freezing, and high energy efficiency.

[0003] The realization of multi-functional refrigerators is closely related to the development of multi-cylinder, multi-stage, and independent refrigeration system technology for refrigeration compressors. However, most refrigeration compressors currently used in refrigerators are small single-cylinder reciprocating compressors. These single-cylinder compressors compress the return gas from the evaporator so that the high-pressure gas obtained after compression enters the condenser. Due to the need for compact design, these compressors face significant challenges in incorporating the aforementioned technologies. Because the return gas pressure from the evaporator is low (containing return gas from the refrigeration cycle), the compressor needs to increase its compression ratio to ensure the energy efficiency of the refrigeration system. However, for applications where compressor space is limited (such as in refrigerators), current single-cylinder reciprocating compressors are constrained by their compact design requirements and cannot meet the high-pressure ratio requirements. Furthermore, because the suction of existing single-cylinder reciprocating compressors is semi-direct suction (meaning the refrigerant from the external refrigeration system first enters the compressor housing cavity before entering the compression chamber of the pump assembly), both the compressor's volumetric efficiency and energy efficiency are relatively low. In order to overcome the aforementioned shortcomings in the prior art, the applicant has proposed a three-cylinder compressor that simultaneously has a rotor compression section and two piston compression sections in the related art. The application of the three-cylinder compressor in a refrigerator requires optimization of the compressor's structure to make the overall structure of the three-cylinder compressor more compact and thus reduce the excessive space occupied by the compressor. Based on this, the present invention is proposed. Summary of the Invention

[0004] Therefore, the present invention provides a cylinder base, a pump body assembly, a compressor, and a refrigeration system and a refrigerator having the same, which enables the structure of the pump body assembly and the three-cylinder compressor using the same to be more compact, reduce the size of the components, and thus reduce the excessive occupation of the compressor installation space.

[0005] To solve the above problems, the present invention provides a cylinder seat for use in a three-cylinder pump assembly. The three-cylinder pump assembly has a rotor compression section, a first piston compression section and a second piston compression section. The cylinder seat includes a cylinder seat body (4). The cylinder seat body (4) has a first cylinder hole (401) corresponding to the rotor compression section, a second cylinder hole (402) corresponding to the first piston compression section and a third cylinder hole (403) corresponding to the second piston compression section. The first cylinder hole (401) penetrates the first side and the second side of the cylinder seat body (4) along its axial direction. The second cylinder hole (402) and the third cylinder hole (403) are circular holes constructed on the side wall of the cylinder seat body (4). A sliding vane groove (42) is formed between the bottom of each circular hole and the rotor compression chamber (12). Each sliding vane groove (42) is used to slide and connect the first sliding vane (23) and the second sliding vane (33).

[0006] In some embodiments, the cylinder block body has a first channel for communicating the exhaust port of the first piston compression section with the intake port of the second piston compression section; and / or, the vane groove passes through the first side and the second side.

[0007] In some embodiments, the second cylinder bore and the third cylinder bore are located on opposite sides of the first cylinder bore, and the central axis of the second cylinder bore is collinear with the central axis of the third cylinder bore and orthogonal to the central axis of the first cylinder bore at the geometric center of the first cylinder bore.

[0008] In some embodiments, a first connecting hole for connecting a cylinder head assembly is formed on the wall of the cylinder seat body corresponding to the orifice of the circular hole; and / or, a second connecting hole for connecting an end flange is also formed on the first side and the second side; and / or, a positioning hole for positioning the end flange is also formed on the first side and the second side.

[0009] In some embodiments, the cylinder block body is provided with a first intake port of the rotor compression chamber; and / or, the cylinder block body is provided with a silencer chamber for the second intake and exhaust chambers and a second channel communicating the silencer chamber with the exhaust port of the cylinder head assembly corresponding to the second intake and exhaust chambers.

[0010] The present invention also provides a three-cylinder pump body assembly, including the cylinder seat described above, wherein the first piston compression section and the second piston compression section form a two-stage compression of the refrigerant in the first circulation pipeline, and the rotor compression section forms a single-stage compression of the refrigerant in the second circulation pipeline. The operation of the rotor compression section can drive the first piston compression section and the second piston compression section to operate, and the refrigerant return pressure in the first circulation pipeline is lower than the refrigerant return pressure in the second circulation pipeline.

[0011] In some implementations...

[0012] The rotor compression section includes a rotor and a rotor compression chamber, the rotor being located within the rotor compression chamber, and the rotor oscillating under the rotational drive of the motor assembly;

[0013] The first piston compression section includes a first piston and a first intake and exhaust chamber. The first piston is located in the first intake and exhaust chamber. A first sliding plate is provided between the rotor and the first piston. The first end of the first sliding plate is hinged to the rotor and the second end of the first sliding plate is hinged to the first piston, so as to drive the first piston to reciprocate linearly when the rotor swings.

[0014] The second piston compression section includes a second piston and a second intake and exhaust chamber. The second piston is located in the second intake and exhaust chamber. A second slide is provided between the rotor and the second piston. The first end of the second slide is hinged to the rotor and the second end of the second slide is hinged to the second piston, so as to drive the second piston to reciprocate linearly when the rotor swings.

[0015] One of the first and second sliders has a flow hole extending through both sides of it.

[0016] The present invention also provides a three-cylinder compressor, including the above-described three-cylinder pump assembly.

[0017] In some embodiments, the three-cylinder compressor further includes a housing having a first intake pipe communicating with the inner cavity of the housing, a second intake pipe communicating with the intake port of the rotor compression section, a first exhaust pipe communicating with the exhaust port of the second piston compression section, and a second exhaust pipe communicating with the exhaust port of the rotor compression section.

[0018] The present invention also provides a refrigeration system, including a compressor, wherein the compressor is the aforementioned three-cylinder compressor, and the refrigeration system further includes a first circulation pipeline connected between the first intake pipe and the first exhaust pipe, and a second circulation pipeline connected between the second intake pipe and the second exhaust pipe, wherein a first condenser, a first throttle valve and a refrigeration evaporator are sequentially arranged along the flow direction of the refrigerant in the first circulation pipeline, and a second condenser, a second throttle valve and a refrigeration evaporator are sequentially arranged along the flow direction of the refrigerant in the second circulation pipeline.

[0019] The present invention also provides a refrigerator, including the above-described refrigeration system.

[0020] The present invention provides a cylinder base, a pump body assembly, a compressor, and a refrigeration system and refrigerator having the same, which have the following beneficial effects:

[0021] By constructing the first cylinder bore, the second cylinder bore, and the third cylinder bore on the cylinder block body, the three compression sections in the three-cylinder pump body assembly can be constructed on one component, simplifying the structure of the pump body assembly and making the structure of the pump body assembly more compact, reducing the component volume, and thus reducing the excessive occupation of the compressor installation space.

[0022] The pump assembly has a rotor compressor and two piston compressors. The two compressors perform two-stage compression on the refrigerant in the first circulation line with lower return gas pressure, thereby increasing the compression ratio of the pump assembly. The single compressor performs single-stage compression on the refrigerant in the second circulation line with higher return gas pressure, thereby improving the volumetric efficiency and energy efficiency ratio of the compressor. By setting one rotor compressor and two piston compressors in the pump assembly, the overall pump assembly is more compact and occupies less space.

[0023] The first piston and the second piston are respectively hinged to the rotor by two sliding plates. The oscillation of the rotor can drive the reciprocating linear motion of the first piston and the second piston that are hinged to it. That is, only one set of rotary drive assembly (i.e. the aforementioned motor assembly) is used to realize the compression drive of the three compression parts, and the structure is simpler.

[0024] The sliding vane slot passes through the first side and the second side, so that the rotor, the first piston and the second piston can be placed into the corresponding cylinder bores respectively and the positions of the three can be adjusted. Then, the first sliding vane and the second sliding vane can be inserted into the corresponding sliding vane slots along the axial direction of the first cylinder bore to achieve the hinge connection of the two ends of the sliding vane, which is simple and easy to implement.

[0025] The second and third cylinder bores are located on opposite sides of the first cylinder bore. The central axes of the second and third cylinder bores are collinear and orthogonal to the central axis of the first cylinder bore. When the rotor swings, it can alternately drive the pistons on both sides to intake or compress. When one piston is at the top dead center of intake, the other piston is exactly at the bottom dead center of exhaust. The volumetric efficiency and energy efficiency of the compression section of the two pistons are further improved.

[0026] By setting the rotor to a split structure and hinged the two pistons to one of them respectively, the smooth swing of the rotor can be effectively ensured, and the first and second sliding plates 33 can be prevented from jamming the rotor on both sides. Attached Figure Description

[0027] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0028] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0029] Figure 1 This is an exploded view of the three-cylinder pump body assembly in an embodiment of the present invention;

[0030] Figure 2 for Figure 1 A three-dimensional structural diagram showing how the rotor drives the first piston and the second piston via the first and second sliding plates, respectively.

[0031] Figure 3 for Figure 1 A three-dimensional structural diagram of the first slider in the process;

[0032] Figure 4 for Figure 1 A three-dimensional structural diagram of the cylinder block;

[0033] Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure;

[0034] Figure 6 for Figure 1 A three-dimensional structural diagram of the first piston (or the second piston) in the process;

[0035] Figure 7 for Figure 1 A three-dimensional structural diagram of the first or second rotor in the process;

[0036] Figure 8 This is a schematic diagram of the compressor structure according to another embodiment of the present invention (with the housing disassembled);

[0037] Figure 9 for Figure 8 Cross-sectional view from a top-down perspective;

[0038] Figure 10This is a schematic diagram of a refrigeration system according to another embodiment of the present invention.

[0039] The reference numerals in the attached figures are as follows:

[0040] 11. Rotor; 111. First rotor; 1111. Rotor hinge slot; 112. Second rotor; 12. Rotor compression chamber; 21. First piston; 211. Piston hinge slot; 22. First intake and exhaust chamber; 23. First vane; 231. Flow hole; 232. First hinge joint; 233. Second hinge joint; 31. Second piston; 32. Second intake and exhaust chamber; 33. Second vane; 4. Cylinder seat body; 401. First cylinder bore; 402. Second cylinder bore; 403. Third cylinder bore; 41. First channel; 42. Vane slot; 43. First connecting hole; 44. Second connecting hole; 451. First 461. Intake port; 462. Silencer chamber; 47. Second channel; 5. Positioning hole; 5. Housing; 51. First intake pipe; 52. Second intake pipe; 53. First exhaust pipe; 54. Second exhaust pipe; 200. Compressor; 201. First throttle valve; 202. Refrigeration evaporator; 203. Second throttle valve; 204. Refrigeration evaporator; 205. Condenser; 301. Cylinder head assembly; 3021. Motor stator; 3022. Motor rotor; 3023. Crankshaft; 3031. Upper flange; 3032. Lower flange; 304. Rotor exhaust silencing chamber; 305. Compression spring assembly; 306. Support base. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0043] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0045] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0048] See also Figures 1 to 10 As shown, according to an embodiment of the present invention, a three-cylinder pump body assembly is provided, comprising: a rotor compression section, a first piston compression section, and a second piston compression section. One of any two of the rotor compression section, the first piston compression section, and the second piston compression section can draw refrigerant from an external first circulation pipeline into it, compress it, and then discharge it to the other compression section for secondary compression. The refrigerant after secondary compression can be discharged back to the first circulation pipeline. The remaining compression section can draw refrigerant from an external second circulation pipeline into it, compress it, and then discharge it back to the second circulation pipeline. It should be noted that the refrigerant return pressure of the first circulation pipeline is lower than that of the second circulation pipeline; that is, the refrigerant pressure entering the corresponding compression section from the first circulation pipeline is lower than that entering the corresponding compression section from the second circulation pipeline.

[0049] In this technical solution, the pump body assembly has a rotor compression section and two piston compression sections. The two compression sections perform two-stage compression on the refrigerant in the first circulation pipeline with lower return gas pressure, thereby increasing the compression ratio of the pump body assembly. The one compression section performs single-stage compression on the refrigerant in the second circulation pipeline with higher return gas pressure, thereby improving the volumetric efficiency and energy efficiency ratio of the compressor. By setting one rotor compression section and two piston compression sections in the pump body assembly, the overall pump body assembly is more compact and occupies less space.

[0050] In a feasible embodiment, the aforementioned rotor compression section can work together with the first piston compression section to form a two-stage compression of the refrigerant in the first circulation pipeline, while the second piston compression section forms a single-stage compression of the refrigerant in the second circulation pipeline. Alternatively, the rotor compression section and the second piston compression section can work together to form a two-stage compression of the refrigerant in the first circulation pipeline, while the first piston compression section forms a single-stage compression of the refrigerant in the second circulation pipeline. All these combinations can improve the compression ratio of the pump assembly.

[0051] In a preferred embodiment, the first piston compression section and the second piston compression section form a two-stage compression of the refrigerant in the first circulation pipeline, and the rotor compression section forms a single-stage compression of the refrigerant in the second circulation pipeline. The operation of the rotor compression section can drive the first piston compression section and the second piston compression section to operate. That is, at this time, the rotor 11 in the rotor compression section can simultaneously drive the first piston 21 in the first piston compression section and the second piston 31 in the second piston compression section to reciprocate linearly during the oscillation process. The structure of the pump body assembly is further simplified and the structure is more compact.

[0052] Specifically, the rotor compression section includes the aforementioned rotor 11 and rotor compression chamber 12. The rotor 11 is located in the rotor compression chamber 12, and the rotor 11 swings under the rotational drive of the motor assembly. Specifically, the aforementioned motor assembly includes a motor stator 3021 and a motor rotor 3022. The motor rotor 3022 is connected to the crankshaft 3023 as a whole, and the aforementioned rotor 11 is fitted onto the eccentric part of the crankshaft 3023 so that the rotation of the motor rotor 3022 can drive the rotor 11 to swing within a certain angle range.

[0053] The first piston compression section includes a first piston 21 and a first intake and exhaust chamber 22. The first piston 21 is located within the first intake and exhaust chamber 22. A first sliding plate 23 is provided between the rotor 11 and the first piston 21. The first end of the first sliding plate 23 is hinged to the rotor 11, and the second end of the first sliding plate 23 is hinged to the first piston 21 (that is, the rotor 11 has a corresponding rotor hinge groove 1111) to drive the first piston 21 to reciprocate linearly when the rotor 11 swings. The second piston compression section includes a second piston 31 and a second intake and exhaust chamber 32. The second piston 31 is located within the second intake and exhaust chamber 32. A second sliding plate 33 is provided between the rotor 11 and the second piston 31. The first end of the second sliding plate 33 is hinged to the rotor 11. The rotor 11 is hinged to the second end of the second slide 33 and the second piston 31, so as to drive the second piston 31 to reciprocate linearly when the rotor 11 swings; one of the first slide 23 and the second slide 33 is provided with a flow hole 231 that passes through both sides of it. That is, although the first slide 23 and the second slide 33 are simultaneously hinged to the rotor 11, the two slides form a spatial cut in the rotor compression chamber 12. The flow hole 231 provided on one of the two slides can ensure that there is still only one compression part and one intake part in the rotor compression chamber 12. The intake and exhaust structure of the rotor compression part does not need to be greatly modified, simplifying the structure of the pump body assembly. The exhaust port of the first piston compression part and the intake port of the second piston compression part are connected through the first channel 41.

[0054] In this technical solution, the first piston 21 and the second piston 31 are respectively hinged to the rotor 11 by two sliding plates. Thus, the oscillation of the rotor 11 can drive the reciprocating linear motion of the first piston 21 and the second piston 31 that are hinged to it. That is, only one set of rotary drive assembly (i.e. the aforementioned motor assembly) is used to realize the compression drive of the three compression parts, and the structure is simpler.

[0055] See Figure 4 As shown, in some embodiments, the three-cylinder pump body assembly includes a cylinder seat, which includes a cylinder seat body 4. The cylinder seat body 4 has a first cylinder bore 401 corresponding to the rotor compression chamber 12, a second cylinder bore 402 corresponding to the first intake and exhaust chamber 22, and a third cylinder bore 403 corresponding to the second intake and exhaust chamber 32. The first cylinder bore 401 extends axially through a first side and a second side of the cylinder seat body 4. The second cylinder bore 402 and the third cylinder bore 403 are circular holes constructed on the sidewall of the cylinder seat body 4, and a vane groove 42 is formed between the bottom of each circular hole and the rotor compression chamber 12. The first vane 23 and the second vane 33 are slidably connected in the corresponding vane groove 42. It is understandable that an upper flange 3031 and a lower flange 3032 are respectively provided on the first and second sides of the cylinder block body 4 to block the two ports of the first cylinder bore 401 and to seal the two shaft end faces of the first sliding vane 23 and the second sliding vane 33. The sealed first cylinder bore 401 forms the rotor compression chamber 12. Cylinder head assemblies 301 are respectively provided at the cylinder bore openings of the second cylinder bore 402 and the third cylinder bore 403 to form the closed first intake and exhaust chamber 22 and the second intake and exhaust chamber 32, respectively. The cylinder head assembly 301 can be a cylinder head assembly known in the industry, that is, it has intake valve plates and exhaust valve plates and other related structures.

[0056] In this technical solution, by constructing a first cylinder bore 401, a second cylinder bore 402, and a third cylinder bore 403 on the cylinder block body 4, the three compression sections in the three-cylinder pump body assembly can be concentrated on one component, which simplifies the structure of the pump body assembly, makes the structure of the pump body assembly more compact, reduces the volume of the component, and thus reduces the excessive occupation of the compressor installation space.

[0057] In some embodiments, the first channel 41 is constructed within the cylinder seat body 4, see details below. Figure 5 As shown, the first channel 41 extends in a straight line and penetrates the two opposite sides of the cylinder block body 4. This reduces the frictional resistance during the process of the refrigerant being discharged from the first piston compression section and entering the second piston compression section, while also reducing the manufacturing difficulty of the first channel 41. The cross-section of the first channel 41 is preferably circular.

[0058] In order to facilitate the assembly of the first sliding vane 23 and the second sliding vane 33 on the cylinder seat body 4 and their respective assembly with the rotor 11 and the piston, in a preferred embodiment, the sliding vane groove 42 passes through the first side and the second side. This allows the rotor 11, the first piston 21, and the second piston 31 to be placed into their respective cylinder bores and their positions adjusted. Then, the first sliding vane 23 and the second sliding vane 33 can be inserted into their respective sliding vane grooves 42 along the axial direction of the first cylinder bore 401 to achieve the hinge connection of the two ends of the sliding vane, which is simple and easy to implement.

[0059] See further Figure 5 As shown, the second cylinder bore 402 and the third cylinder bore 403 are located on opposite sides of the first cylinder bore 401. The central axis of the second cylinder bore 402 is collinear with the central axis of the third cylinder bore 403 and is orthogonal to the central axis of the first cylinder bore 401 at the geometric center of the first cylinder bore 401. The aforementioned geometric center is the center of the cross-sectional circle passing through the midpoint of the height direction of the first cylinder bore 401. The aforementioned orthogonality means that the central axis of the second cylinder bore 402 is perpendicular to the central axis of the first cylinder bore 401.

[0060] In this technical solution, the second cylinder bore 402 and the third cylinder bore 403 are located on opposite sides of the first cylinder bore 401. The central axes of the second cylinder bore 402 and the third cylinder bore 403 are collinear and orthogonal to the central axis of the first cylinder bore 401. When the rotor 11 swings, it can alternately drive the pistons on both sides to draw in or compress air. When one piston is at the top dead center of the intake, the other piston is exactly at the bottom dead center of the exhaust. The volumetric efficiency and energy efficiency of the compression section of the two pistons are further improved, and the force on the pump body assembly is more balanced during operation. It should be noted that the cylinder base in this invention can have a smaller body height after being applied to the compressor, so it is particularly suitable for working conditions where the installation height space is limited.

[0061] In some embodiments, a first connecting hole 43 for connecting the cylinder head assembly 301 is formed on the wall of the cylinder seat body 4 corresponding to the orifice of the circular hole; and / or, a second connecting hole 44 for connecting the end flange is also formed on the first side and the second side; and / or, a positioning hole 47 for positioning the end flange is also formed on the first side and the second side, so as to facilitate pre-positioning during the assembly of the upper flange 3031 and the lower flange 3032. The aforementioned cylinder head assembly 301 and end flange can be detachably connected by corresponding screws. Specifically, the aforementioned first connecting hole 43 and second connecting hole 44 can be through holes or threaded holes.

[0062] In some embodiments, the cylinder block body 4 is provided with a first intake port 451 of the rotor compression chamber 12, and the corresponding first exhaust port (not shown in the figure) can be provided on the aforementioned lower flange 3032; and / or, the cylinder block body 4 is provided with a silencing chamber 461 of the second intake and exhaust chamber 32 and a second channel 462 connecting the silencing chamber 461 with the exhaust port of the cylinder head assembly 301 corresponding to the second intake and exhaust chamber 32. The silencing chamber 461 is directly provided on the cylinder block body 4, which can reduce the noise of the exhaust of the second piston compression section and further improve the structural compactness of the pump body assembly.

[0063] In some embodiments, the rotor 11 includes a first rotor 111 and a second rotor 112 disposed adjacent to each other along its axial direction. The first vane 23 is hinged to the first rotor 111, and the second vane 33 is hinged to the second rotor 112. The term "adjacent" refers to the two adjacent end faces of the first rotor 111 and the second rotor 112 abutting against each other and forming a seal, such as an oil seal, to prevent refrigerant from entering the central hole of the rotor 11 from the mating surfaces of the two end faces. See details. Figure 2 As shown, by setting the rotor 11 as a split structure and hinged the two pistons to one of them respectively, the smooth swing of the rotor 11 can be effectively guaranteed, and the first slide plate 23 and the second slide plate 33 can be prevented from jamming the rotor 11 on both sides.

[0064] In some embodiments, the height of the first sliding plate 23 is H, the outer diameter of the first piston 21 is D, and H / D = 1.5~2; and / or, the height of the second sliding plate 33 is H, the outer diameter of the second piston 31 is D, and H / D = 1.5~2; further, the first sliding plate 23 is hinged to the first rotor 111 via a first hinge joint 232, the length of the first hinge joint 232 in the axial direction of the first rotor 111 is h2, h2 / D = 1~1.5; the first sliding plate 23 is sealed to the first rotor 111 via a first contact surface, the length of the first contact surface in the axial direction of the first rotor 111 is h1, h1 = h2 = H / 2. This ensures the reliable assembly of each sliding plate with its corresponding piston and rotor. (See also...) Figure 6 and Figure 7 As shown, the first slider 23 and the second slider 33 are respectively hinged to the first piston 21 and the second piston 31 through the corresponding piston hinge groove 211. A second hinge joint 233 is formed on the side of the slider corresponding to the piston hinge groove 211. The length of the second hinge joint 233 is equal to the height H of the slider.

[0065] According to an embodiment of the present invention, in conjunction with [see also...] Figure 8 and Figure 9As shown, a three-cylinder compressor is also provided, including the three-cylinder pump body assembly described above. Specifically, the three-cylinder compressor further includes a housing 5 (including an upper cover and a bottom shell that are fastened together). The housing 5 has a first intake pipe 51 that communicates with the inner cavity of the housing 5, a second intake pipe 52 that communicates with the intake port of the rotor compression section, a first exhaust pipe 53 that communicates with the exhaust port of the second piston compression section, and a second exhaust pipe 54 that communicates with the exhaust port of the rotor compression section.

[0066] According to an embodiment of the present invention, see Figure 10 As shown, a refrigeration system is also provided, including a compressor 200, which is the three-cylinder compressor described above. The refrigeration system further includes a first circulation pipeline connected between the first intake pipe 51 and the first exhaust pipe 53, and a second circulation pipeline connected between the second intake pipe 52 and the second exhaust pipe 54. In the first circulation pipeline, a first condenser, a first throttle valve 201, and a refrigeration evaporator 202 are sequentially arranged along the flow direction of the refrigerant inside. In the second circulation pipeline, a second condenser, a second throttle valve 203, and a refrigeration evaporator 204 are sequentially arranged along the flow direction of the refrigerant inside. In a preferred embodiment, the first condenser and the second condenser are integrated into a single condenser 205.

[0067] In this technical solution, the first circulation pipeline is the refrigeration system circuit, and the second circulation pipeline is the refrigeration system circuit. The two system circuits are controlled independently. Because the two-stage compression of the refrigerant in the refrigeration system by the first and second piston compression sections can significantly increase the compressor's intake volume and return pressure (i.e., suction pressure), reduce the compression ratio, and increase the cooling capacity, it achieves the beneficial effect of improving compressor efficiency. It effectively avoids the limitation that the refrigerant pressure in the refrigeration system is relatively low and that the compressor's single-stage compression ratio cannot be too large. The refrigerant pressure in the refrigeration system is relatively high, and a single-stage compression can meet the refrigerant pressure requirements. This invention utilizes the rotor compression section of the single-stage compression to directly draw in air, which can improve the compressor's suction efficiency and refrigeration efficiency.

[0068] According to an embodiment of the present invention, a refrigerator is also provided, including the above-described refrigeration system. At this time, the low-pressure refrigerant flowing back from the freezer evaporator (i.e., the aforementioned freezer evaporator 202) enters the shell cavity (i.e., the internal space of the shell) through the first suction pipe 51, and then enters the first suction and exhaust chamber 22 through the suction muffler for primary compression. After compression, the medium-pressure refrigerant is discharged and enters the second suction and exhaust chamber 32 for secondary compression. After compression, the high-pressure refrigerant flows through the exhaust muffler chamber (i.e., the muffler chamber 461 mentioned above) and then the first exhaust pipe 53 discharges the high-pressure refrigerant into the refrigeration system, completing the piston dual-cylinder dual-stage independent refrigeration circuit. At the same time, the medium-pressure refrigerant flowing back from the refrigerator evaporator (i.e., the refrigerator evaporator 204 mentioned above) directly enters the rotor suction chamber through the second suction pipe 52. After rotational compression, it becomes high-pressure refrigerant and enters the rotor exhaust chamber. After flowing through the muffler (i.e., the rotor exhaust muffler chamber 304), the high-pressure refrigerant is discharged into the refrigeration system through the second exhaust pipe 54, completing the rotor single-cylinder single-stage independent refrigeration circuit.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A three-cylinder pump body assembly, characterized in that, The cylinder housing includes a cylinder seat and has a rotor compression section, a first piston compression section, and a second piston compression section. The cylinder seat includes a cylinder seat body (4), on which a first cylinder bore (401) corresponding to the rotor compression section, a second cylinder bore (402) corresponding to the first piston compression section, and a third cylinder bore (403) corresponding to the second piston compression section are formed. The rotor compression section includes a rotor (11) and a rotor compression chamber (12). The first cylinder bore (401) penetrates the first side and the second side of the cylinder seat body (4) along its axial direction. The second cylinder bore (402) and the third cylinder bore (403) are circular holes constructed on the sidewalls of the cylinder seat body (4), and the holes of each of the circular holes are... A sliding vane groove (42) is formed between the bottom and the rotor compression chamber (12), and each sliding vane groove (42) is used to slide and connect the first sliding vane (23) and the second sliding vane (33); a first channel (41) is constructed inside the cylinder seat body (4), and the first channel (41) is used to connect the exhaust port of the first piston compression part and the intake port of the second piston compression part. The first piston compression part and the second piston compression part form a two-stage compression of the refrigerant in the first circulation pipeline, and the rotor compression part forms a single-stage compression of the refrigerant in the second circulation pipeline. The return gas pressure of the first circulation pipeline is lower than the return gas pressure of the second circulation pipeline, and the first circulation pipeline is a refrigeration system loop and the second circulation pipeline is a refrigeration circulation loop. The rotor (11) is located in the rotor compression chamber (12), and the rotor (11) swings under the rotational drive of the motor assembly; The first piston compression section includes a first piston (21) and a first intake and exhaust chamber (22). The first piston (21) is located in the first intake and exhaust chamber (22). A first slide (23) is provided between the rotor (11) and the first piston (21). The first end of the first slide (23) is hinged to the rotor (11), and the second end of the first slide (23) is hinged to the first piston (21) so as to drive the first piston (21) to reciprocate linearly when the rotor (11) swings. The second piston compression section includes a second piston (31) and a second intake and exhaust chamber (32). The second piston (31) is located in the second intake and exhaust chamber (32). A second slide (33) is provided between the rotor (11) and the second piston (31). The first end of the second slide (33) is hinged to the rotor (11), and the second end of the second slide (33) is hinged to the second piston (31) so as to drive the second piston (31) to reciprocate linearly when the rotor (11) swings. One of the first slider (23) and the second slider (33) has a flow hole (231) that runs through both sides of it. The rotor (11) includes a first rotor (111) and a second rotor (112) arranged adjacent to each other along its axial direction, the first slide (23) being hinged to the first rotor (111) and the second slide (33) being hinged to the second rotor (112).

2. The three cylinder pump block assembly of claim 1, wherein, The sliding groove (42) passes through the first side and the second side.

3. The three-cylinder pump body assembly according to claim 1, characterized in that, The second cylinder bore (402) and the third cylinder bore (403) are located on opposite sides of the first cylinder bore (401). The central axis of the second cylinder bore (402) is collinear with the central axis of the third cylinder bore (403) and is orthogonal to the central axis of the first cylinder bore (401) at the geometric center of the first cylinder bore (401).

4. The three cylinder pump block assembly of claim 1, wherein, The cylinder seat body (4) corresponding to the orifice of the circular hole has a first connecting hole (43) for connecting the cylinder head assembly (301); and / or, the first side and the second side are also provided with a second connecting hole (44) for connecting the end flange; and / or, the first side and the second side are also provided with a positioning hole (47) for positioning the end flange.

5. The three cylinder pump block assembly of claim 1, wherein, The cylinder seat body (4) is provided with a first intake port (451) of the rotor compression chamber (12); and / or, the cylinder seat body (4) is provided with a silencer chamber (461) of the second intake and exhaust chamber (32) and a second channel (462) that connects the silencer chamber (461) with the exhaust port of the cylinder head assembly (301) corresponding to the second intake and exhaust chamber (32).

6. A three-cylinder compressor characterized by Includes the three-cylinder pump body assembly as described in claim 5.

7. The three-cylinder compressor of claim 6, wherein, It also includes a housing (5), which has a first intake pipe (51) communicating with the inner cavity of the housing (5), a second intake pipe (52) communicating with the intake port of the rotor compression section, a first exhaust pipe (53) communicating with the exhaust port of the second piston compression section, and a second exhaust pipe (54) communicating with the exhaust port of the rotor compression section.

8. A refrigeration system comprising a compressor (200), characterized in that, The compressor (200) is the three-cylinder compressor of claim 7. The refrigeration system further includes a first circulation pipeline connected between the first suction pipe (51) and the first exhaust pipe (53) and a second circulation pipeline connected between the second suction pipe (52) and the second exhaust pipe (54). The first circulation pipeline is provided with a first condenser, a first throttle valve (201) and a refrigeration evaporator (202) in sequence along the flow direction of the refrigerant inside. The second circulation pipeline is provided with a second condenser, a second throttle valve (203) and a refrigeration evaporator (204) in sequence along the flow direction of the refrigerant inside.

9. A refrigerator characterized by comprising: Includes the refrigeration system as described in claim 8.

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