Lower cover assembly and compressor

Abstract

The present invention discloses a lower cover assembly and a compressor, wherein the lower cover assembly includes a lower cover body and a partition unit, wherein the partition unit is arranged in the lower cover body and divides the internal space of the lower cover body into a sealed space and an open space; wherein, the sealed space cannot accommodate refrigeration oil, and the open space can accommodate refrigeration oil, and when the compressor is installed, the sealed space faces the installation side of the liquid distributor. The lower cover assembly provided by the present invention solves the problem of center of gravity offset through the cooperation of the lower cover body, the partition unit, the sealed space and the open space, specifically: the partition unit is forced to form a sealed space close to the liquid distributor side and an open space away from the liquid distributor side in the lower cover body. This asymmetric oil distribution causes the center of gravity of the lower cover part to shift in the direction away from the liquid distributor, thereby compensating for the center of gravity offset of the whole machine caused by the weight of the liquid distributor and its refrigerant, and returning the comprehensive center of gravity to the central axis of the pump body, eliminating the problems of eccentric operation, vibration noise and uneven force on the mounting feet.

Description

Technical Field

[0001] The present invention belongs to the technical field of compressors, and in particular relates to a lower cover assembly and a compressor. Background Art

[0002] Rotary compressors are widely used in refrigeration equipment. Their typical structure consists of a housing assembly, a pump assembly, and a liquid distributor mounted on the side of the housing. The liquid distributor stores and distributes refrigerant, but due to its own weight and the weight of the refrigerant inside, the center of gravity of the compressor deviates from the central axis of the pump body. This center of gravity offset causes two key technical issues during compressor operation:

[0003] First, when the rotor drives the pump assembly to rotate, the pump body parts are subject to additional eccentric loads because the center of gravity is not on the center line of rotation. This eccentric operation leads to reliability issues such as abnormal wear of the vanes and eccentric wear of the rollers, and at the same time, rotational vibration is generated on the distributor side. This vibration is directly transmitted to the compressor housing through the distributor bracket, causing the vibration amplitude of the entire machine to increase by more than 40% and the operating noise to increase significantly. Secondly, the mounting feet of traditional compressors are evenly distributed around the circumference of the housing assembly. When the center of gravity of the entire machine shifts, the three mounting feet are subjected to uneven stress in the air-conditioning system. This uneven force causes the compressor to tilt during installation, forcing the connecting piping to bear torsional stress. During long-term operation, fatigue cracks are prone to occur in the stress concentration areas of the piping, which not only increases the risk of refrigerant leakage, but also further amplifies the system vibration and noise, ultimately reducing the service life of the entire machine.

[0004] To address this issue, existing technologies have attempted to add counterweights to the housing opposite the dispenser. While this method can partially compensate for the center of gravity shift, it increases the overall weight of the device by over 10%, leading to increased energy consumption and significantly higher material costs. Another approach is to use a lightweight dispenser structure, but precision components made from composite materials are expensive and have limited effect on vibration reduction. None of these methods can simultaneously address both vibration noise and installation stability, and neither involves systematic optimization of the installation base. Summary of the Invention

[0005] In view of this, the present invention provides a lower cover assembly and a compressor, which solve the technical problems of traditional compressors that vibration noise and installation stability cannot meet the requirements due to the offset of the center of gravity.

[0006] In order to solve the above problems, according to one aspect of the present application, an embodiment of the present invention provides a lower cover assembly, which is used for a compressor, and the compressor has a liquid distributor installation side. The lower cover assembly includes a lower cover body and a partition unit, and the partition unit is arranged in the lower cover body and divides the internal space of the lower cover body into a sealed space and an open space; wherein, the sealed space cannot accommodate refrigerant oil, and the open space can accommodate refrigerant oil, and when the compressor is installed, the sealed space faces the liquid distributor installation side.

[0007] In some embodiments, the partition unit includes a baffle and a cover plate, the baffle is mounted on the lower cover body, and the cover plate covers the baffle and the lower cover body to form the sealed space.

[0008] In some embodiments, a baffle mounting groove and a cover plate mounting groove are provided on the lower cover body, the baffle is fixed in the baffle mounting groove, and the cover plate is fixed in the cover plate mounting groove.

[0009] In some embodiments, the baffle and the lower cover body, and the cover plate, the baffle and the lower cover body are sealed by welding or sealing adhesive.

[0010] In some embodiments, the lower cover body includes a first body, a second body and a connecting unit, the first body and the second body are arranged opposite to each other up and down and connected by the connecting unit; the partition unit is arranged on the first body and / or the second body.

[0011] In some embodiments, an upper baffle mounting groove and a cover plate mounting groove are provided on the first body, a lower baffle mounting groove is provided on the second body, the baffle is fixed in the upper baffle mounting groove and the lower baffle mounting groove, and the cover plate is fixed in the cover plate mounting groove.

[0012] In some embodiments, the connecting unit includes a protrusion and a groove, the protrusion is arranged at the lower end of the first body, and the groove is arranged at the upper end of the second body, and the protrusion and the groove cooperate to realize the detachable connection between the first body and the second body.

[0013] In some embodiments, the edge of the lower cover body is provided with at least three circumferentially evenly distributed positioning and mounting grooves, and the space between the baffle and the cover plate is symmetrical about one of the positioning and mounting grooves.

[0014] In some embodiments, a bottom edge of the second body is provided with mounting feet.

[0015] According to another aspect of the present application, an embodiment of the present invention provides a compressor, which includes a housing assembly, a pump body assembly, a liquid separator and the above-mentioned lower cover assembly, wherein the lower cover assembly is installed at the bottom of the housing assembly through a positioning mounting groove, the pump body assembly is arranged in the housing assembly, the housing assembly has a liquid separator installation side, the liquid separator is arranged on the liquid separator installation side, and the sealed space faces the liquid separator installation side.

[0016] In some embodiments, when the edge of the lower cover body is provided with at least three circumferentially evenly distributed positioning and mounting grooves, the space between the baffle and the cover plate is symmetrical about one of the positioning and mounting grooves; one of the positioning and mounting grooves is coaxially aligned with the intake pipe of the shell assembly, and its symmetry center line is parallel to the center line of the liquid distributor installation side; one of the positioning and mounting grooves is configured to be installed in the direction of the liquid distributor, and the space between the baffle and the cover plate is symmetrically distributed at both ends of the compressor body.

[0017] Compared with the prior art, the lower cover assembly of the present invention has at least the following beneficial effects:

[0018] The lower cover assembly provided by the present invention is used for a compressor, which has a liquid distributor mounting side. The lower cover assembly includes a lower cover body and a partition unit. The partition unit is arranged in the lower cover body and divides the internal space of the lower cover body into a sealed space and an open space; wherein, the sealed space cannot accommodate refrigeration oil, and the open space can accommodate refrigeration oil, and when the compressor is installed, the sealed space faces the liquid distributor mounting side.

[0019] The lower cover assembly provided by the present invention solves the problem of center of gravity shift by integrating the lower cover body, the baffle unit, the sealed space, and the open space. Specifically, the baffle unit forcibly forms a sealed space near the liquid dispenser and an open space away from the liquid dispenser within the lower cover body. This asymmetric oil distribution shifts the center of gravity of the lower cover away from the liquid dispenser, compensating for the overall center of gravity shift caused by the weight of the liquid dispenser and its refrigerant, returning the overall center of gravity to the central axis of the pump body and eliminating eccentric operation, vibration noise, and uneven force on the mounting feet.

[0020] The compressor provided by the present invention is designed based on the above-mentioned lower cover assembly. Its beneficial effects can be found in the beneficial effects of the above-mentioned lower cover assembly, which will not be described in detail here.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 is a structural schematic diagram of a lower cover assembly provided by an embodiment of the present invention;

[0024] Figure 2 is a top view of a lower cover assembly provided by an embodiment of the present invention;

[0025] Figure 3 is a top view of the lower cover body in the lower cover assembly provided by an embodiment of the present invention;

[0026] Figure 4 1 is a schematic structural diagram of a lower cover body in a lower cover assembly provided by an embodiment of the present invention;

[0027] Figure 5 1 is a schematic structural diagram of a baffle in a lower cover assembly provided by an embodiment of the present invention;

[0028] Figure 6 is a side view of a baffle in a lower cover assembly provided by an embodiment of the present invention;

[0029] Figure 7 1 is a schematic structural diagram of a cover plate in a lower cover assembly provided by an embodiment of the present invention;

[0030] Figure 8 is a side view of a cover plate in a lower cover assembly provided by an embodiment of the present invention;

[0031] Figure 9 is another top view of the lower cover assembly provided by an embodiment of the present invention;

[0032] Figure 10 is another structural schematic diagram of the lower cover assembly provided by an embodiment of the present invention;

[0033] Figure 11 is another top view of the lower cover body in the lower cover assembly provided by an embodiment of the present invention;

[0034] Figure 12 is another structural schematic diagram of the lower cover body in the lower cover assembly provided by an embodiment of the present invention;

[0035] Figure 13 is another structural schematic diagram of the baffle in the lower cover assembly provided by an embodiment of the present invention;

[0036] Figure 14is another side view of the baffle in the lower cover assembly provided by an embodiment of the present invention;

[0037] Figure 15 is another structural schematic diagram of the cover plate in the lower cover assembly provided by an embodiment of the present invention;

[0038] Figure 16 is another side view of the cover plate in the lower cover assembly provided by an embodiment of the present invention;

[0039] Figure 17 is a top view of a lower cover assembly provided by an embodiment of the present invention;

[0040] Figure 18 1 is a schematic structural diagram of a lower cover assembly provided by an embodiment of the present invention, when the lower cover assembly includes a first body and a second body;

[0041] Figure 19 is a top view of the first body in the lower cover assembly provided by an embodiment of the present invention;

[0042] Figure 20 is a structural schematic diagram of the first body in the lower cover assembly provided by an embodiment of the present invention;

[0043] Figure 21 is a side view of the first body in the lower cover assembly provided by an embodiment of the present invention;

[0044] Figure 22 is a structural schematic diagram of the second body in the lower cover assembly provided by an embodiment of the present invention;

[0045] Figure 23 is a top view of the second body in the lower cover assembly provided by an embodiment of the present invention;

[0046] Figure 24 is a side view of the second body in the lower cover assembly provided by an embodiment of the present invention;

[0047] Figure 25 is a third side view of the baffle in the lower cover assembly provided by an embodiment of the present invention;

[0048] Figure 26 1 is a third structural schematic diagram of a baffle in a lower cover assembly provided by an embodiment of the present invention;

[0049] Figure 27 This is a third side view of the cover plate in the lower cover assembly provided by an embodiment of the present invention;

[0050] Figure 28 1 is a third structural schematic diagram of the cover plate in the lower cover assembly provided by an embodiment of the present invention;

[0051] Figure 29is a schematic structural diagram of a compressor provided by an embodiment of the present invention;

[0052] Figure 30 is another structural schematic diagram of a compressor provided by an embodiment of the present invention;

[0053] in:

[0054] 1. Lower cover assembly; 11. Lower cover body; 12. Partition unit; 111. Baffle mounting groove; 112. Cover mounting groove; 113. First body; 114. Second body; 115. Connecting unit; 116. Positioning mounting groove; 117. Mounting foot; 121. Baffle; 122. Cover; 1131. Upper baffle mounting groove; 1132. Cover mounting groove; 1151. Protrusion; 1152. Groove; 2. Internal space; 21. Sealed space; 22. Open space; 3. Pump body assembly; 31. Crankshaft; 32. Muffler; 33. Upper flange; 34. Cylinder; 35. Roller; 36. Lower flange; 37. Slide; 38. Spring; 4. Liquid distributor; 5. Shell assembly. DETAILED DESCRIPTION

[0055] To further illustrate the technical means and effects employed by the present invention to achieve its intended objectives, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention is provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different references to "one embodiment" or "embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0056] In the description of the present invention, it should be clarified that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence; the terms "vertical", "transverse", "longitudinal", "front", "back", "left", "right", "up", "down", "horizontal", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, and do not mean that the devices or elements referred to must have a specific direction or position, and therefore cannot be understood as limiting the present invention.

[0057] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0058] Example 1:

[0059] This embodiment provides a lower cover assembly, such as Figure 1-Figure 28 As shown, the lower cover assembly is used for a compressor, and the compressor has a liquid dispenser installation side. The lower cover assembly includes a lower cover body 11 and a partition unit 12. The partition unit 12 is arranged in the lower cover body 11 and divides the internal space 2 of the lower cover body 11 into a sealed space 21 and an open space 22; wherein, the sealed space 21 cannot accommodate refrigeration oil, and the open space 22 can accommodate refrigeration oil, and when the compressor is installed, the sealed space 21 faces the liquid dispenser installation side.

[0060] In the lower cover assembly, the partition unit 12 is fixedly connected to the interior of the lower cover body 11, dividing its internal space into two independent areas: the partition unit 12 and the lower cover body 11 together form a sealed space 21, which is isolated from the rest of the lower cover body 11; and the area not completely enclosed by the partition unit 12 forms an open space 22, which is connected to the remaining volume of the lower cover body 11. In the installed state, the sealed space 21 is located near the installation side of the compressor distributor, and the open space 22 is located away from the installation side of the distributor. The lower cover body 11 serves as the basic structure to provide a storage space and support the partition unit 12. The core function of the partition unit 12 is to physically separate the internal space of the lower cover body 11. The sealed space 21 is designed to be a cavity that cannot accommodate refrigerant oil, and its existence reduces the mass of this area. The function of the open space 22 is to accommodate and store the refrigerant oil necessary for the operation of the compressor, providing lubrication and sealing functions.

[0061] The partition unit 12 is fixedly installed inside the lower cover body 11, rigidly separating the sealed space 21 and the open space 22; the sealed space 21 always remains oil-free, while the open space 22 contains refrigerant oil; by orienting the oil-free sealed space 21 on the side where the liquid distributor is installed and the oil-storing open space 22 on the opposite side, an asymmetric distribution of the refrigerant oil inside the lower cover is achieved.

[0062] The lower cover assembly provided in this embodiment solves the problem of center of gravity shift through the coordination of the lower cover body 11, the baffle unit 12, the sealed space 21, and the open space 22. Specifically, the baffle unit 12 forcibly forms a sealed space 21 (an oil-free, lightweight area) near the liquid dispenser and an open space 22 (an oil-storage, heavy area) away from the liquid dispenser within the lower cover body 11. This asymmetric oil distribution shifts the center of gravity of the lower cover away from the liquid dispenser, compensating for the overall center of gravity shift caused by the weight of the liquid dispenser and its refrigerant, returning the overall center of gravity to the central axis of the pump body and eliminating eccentric operation, vibration noise, and uneven force on the mounting feet.

[0063] In a specific embodiment, the partition unit 12 includes a baffle 121 and a cover plate 122 . The baffle 121 is installed on the lower cover body 11 , and the cover plate 122 covers the baffle 121 and the lower cover body 11 to form the sealed space 21 .

[0064] The baffle 121 is vertically mounted on the inner wall of the lower cover body 11, and the cover 122 horizontally covers and is sealed to the top edge of the baffle 121 and the corresponding wall of the lower cover body 11. The three together form a closed structure. The baffle 121 serves as a lateral partition, and the cover 122 serves as a top closing body, and the two are orthogonally connected to each other. The core function of the baffle 121 is to physically partition the interior of the lower cover body 11 to form a basic framework for spatial isolation; the core function of the cover 122 is to cooperate with the baffle 121 and the lower cover body 11 to form a completely enclosed cavity to ensure that the area is isolated from the outside. The combination of the two achieves absolute sealing control of a specific area. The baffle 121 and the cover 122 are rigidly connected by edge fitting: the baffle 121 provides a vertical isolation surface, and the cover 122 covers its top opening and is sealed with the wall of the lower cover body 11. This combination forces the formation of an oil-free sealed space 21 near the liquid separator, while leaving an open space 22 connected to the refrigeration oil system on the side away from the liquid separator, ultimately achieving directional asymmetric distribution of the refrigeration oil inside the lower cover.

[0065] In a specific embodiment, a baffle mounting groove 111 and a cover plate mounting groove 112 are provided on the lower cover body 11 , the baffle 121 is fixed in the baffle mounting groove 111 , and the cover plate 122 is fixed in the cover plate mounting groove 112 .

[0066] The baffle mounting groove 111 is provided on the inner wall surface of the lower cover body 11, and the baffle 121 is vertically inserted and fixed in the groove; the cover plate mounting groove 112 is provided on the top edge of the lower cover body 11, and the cover plate 122 is horizontally embedded and fixed in the groove. At the same time, the bottom surface of the cover plate 122 contacts and seals with the top edge of the baffle 121, and the three form a rigid connection. The baffle mounting groove 111 provides axial positioning for the baffle 121, and the cover plate mounting groove 112 defines the horizontal position of the cover plate 122. The core function of the baffle mounting groove 111 is to constrain the installation position and posture of the baffle 121, ensuring that it vertically separates the internal space of the lower cover; the core function of the cover plate mounting groove 112 is to provide a precise installation reference for the cover plate 122, so that it can completely cover the opening area formed by the top of the baffle 121 and the lower cover body 11. The two together constitute the positioning basis for space separation.

[0067] Baffle 121 is fixed vertically through baffle mounting slot 111, forming a spatially isolated facade. Cover plate 122 is positioned horizontally through cover plate mounting slot 112, completely covering the junction between the top of baffle 121 and the lower cover body 11. This combination creates a sealed cavity on the liquid dispenser side, enclosed by the lower cover body 11, baffle 121, and cover plate 122, known as sealed space 21. This ensures that this area is completely isolated from the refrigeration oil system, while creating an open space 22 on the opposite side that connects to the oil circuit, achieving asymmetric distribution control of the refrigeration oil.

[0068] In a specific embodiment, the baffle 121 and the lower cover body 11 , as well as the cover plate 122 , the baffle 121 and the lower cover body 11 , are sealed by welding or sealing adhesive.

[0069] The contact interface between baffle 121 and lower cover body 11, the contact interface between cover plate 122 and the top of baffle 121, and the circumferential contact interface between cover plate 122 and lower cover body 11 are all permanently sealed using welding, fusion, or sealant filling. The core benefit of this setup is that the triple seal ensures that the sealed space 21 enclosed by the three elements forms an absolutely closed cavity, completely blocking the infiltration of refrigerant oil while maintaining internal pressure balance. This provides a reliable structural foundation for the asymmetric distribution of refrigerant oil in open space 22, thereby achieving precise center of gravity offset compensation control.

[0070] In a specific embodiment, the lower cover body 11 includes a first body 113, a second body 114 and a connecting unit 115. The first body 113 and the second body 114 are arranged opposite to each other up and down and are connected by the connecting unit 115; the partition unit 12 is arranged on the first body 113 and / or the second body 114.

[0071] The partition unit 12 is fixedly mounted on the inner surface of the first body 113 or the inner surface of the second body 114, or straddles both. The first body 113 and the second body 114 are arranged parallel to each other in the vertical direction and are rigidly connected at the circumferential edge by a connecting unit 115. The connecting unit 115 is a continuous annular structure, forming a complete accommodation space between the first body 113 and the second body 114, within which the partition unit 12 performs a partitioning function. The first body 113 serves as the upper cover, providing a top seal and a base for partition installation. The second body 114 serves as the main container, providing bottom support and a base for storing refrigerated oil. The core function of the connecting unit 115 is to achieve a sealed connection and force transmission between the first body 113 and the second body 114, ensuring that the two form a structurally stable integral cavity when combined. The connecting unit 115 presses and fixes the first body 113 and the second body 114 together to form a sealed cavity. The partition unit 12 is pre-installed on either body to complete the spatial separation as the cavity is closed. This combination significantly expands the axial height and internal volume of the lower cover body 11, which not only enhances the capacity adjustment capability of the sealed space 21 and the open space 22, but also provides a more flexible installation and positioning surface for the partition unit 12, ultimately achieving a wider range of center of gravity offset compensation control.

[0072] In a specific embodiment, an upper baffle mounting groove 1131 and a cover plate mounting groove 1132 are provided on the first body 113, and a lower baffle mounting groove is provided on the second body 114. The baffle 121 is fixed in the upper baffle mounting groove 1131 and the lower baffle mounting groove, and the cover plate 122 is fixed in the cover plate mounting groove 1132.

[0073] The upper baffle mounting groove 1131 is located on the bottom surface of the first body 113, and the lower baffle mounting groove is located on the top surface of the second body 114, with the two axially aligned. The baffle 121 is vertically inserted into both the upper baffle mounting groove 1131 and the lower baffle mounting groove to achieve bidirectional fixation. The cover plate mounting groove 1132 is set at the edge of the top surface of the first body 113, and the cover plate 122 is horizontally embedded therein and completely covers the joint area between the top of the baffle 121 and the first body 113, forming a closed structure. The core function of the upper baffle mounting groove 1131 is to constrain the position and posture of the top of the baffle 121; the core function of the lower baffle mounting groove is to lock the position of the bottom of the baffle 121 and transfer loads; the function of the cover plate mounting groove 1132 is to provide a precise planar positioning reference for the cover plate 122, ensuring that it completely closes the opening formed by the upper end of the baffle 121 and the first body 113.

[0074] The upper and lower baffle mounting grooves 1131 and 114 together clamp the upper and lower ends of the fixed baffle 121, forming a rigid dividing surface that runs through the first and second bodies 113 and 114. The cover 122 is pressed onto the top of the baffle 121 and the first body 113 via the cover mounting grooves 1132. Together, the three create a closed, sealed space 21. This coordination provides bidirectional support for the baffle 121, enhancing its structural stability. It also ensures that the sealed space 21 is fully sealed within the split lower cover structure, providing precise geometric boundary control for the asymmetric distribution of the refrigeration oil.

[0075] In a specific embodiment, the connecting unit 115 includes a protrusion 1151 and a groove 1152, the protrusion 1151 is arranged at the lower end of the first body 113, and the groove 1152 is arranged at the upper end of the second body 114, and the protrusion 1151 and the groove 1152 cooperate to realize the detachable connection between the first body 113 and the second body 114.

[0076] Protrusions 1151 are continuously distributed around the lower periphery of the first body 113, forming an annular boss. Recesses 1152 are correspondingly provided around the upper periphery of the second body 114, forming a matching annular groove. During assembly, protrusions 1151 are axially embedded into recesses 1152 to achieve radial constraint, while the end faces of the two are pressed together to form axial positioning, keeping the first and second bodies 113 and 114 coaxial. The core function of protrusions 1151 is to transfer the load of the first body 113 and limit the radial displacement of the second body 114. The core function of recesses 1152 is to provide precise accommodation space for protrusions 1151, achieving radial positioning through sidewall contact and axial pressure bearing through the bottom surface of the groove. Together, the two form a mechanical interlocking structure that can be repeatedly assembled and disassembled.

[0077] After the protrusion 1151 is embedded in the groove 1152, the radial gap is eliminated to ensure the coaxiality of the two; the connector provides a stable installation base for the baffle 121 across the first body 113 and the second body 114, so that the space separation function of the partition unit 12 is accurately realized in the split structure, and it is convenient to quickly disassemble and replace internal components during maintenance.

[0078] In a specific embodiment, at least three circumferentially evenly distributed positioning and mounting grooves 116 are provided at the edge of the lower cover body 11 , and the space between the baffle 121 and the cover plate 122 is symmetrical about one of the positioning and mounting grooves 116 .

[0079] Positioning grooves 116 are circumferentially defined along the edge of the lower cover body 11, with the central axis of one groove coinciding with the central plane of symmetry of the assembly formed by baffle 121 and cover plate 122. The sealing structure formed by baffle 121 and cover plate 122 is arranged in a bilaterally mirror-symmetrical pattern with respect to positioning groove 116, forming a spatial relationship between the three. The core function of positioning grooves 116 is to precisely position the lower cover body 11 on the compressor in a circumferential direction by cooperating with the locating pins of the external housing assembly, ensuring that the sealed space 21 enclosed by baffle 121 and cover plate 122 is accurately oriented toward the side where the liquid dispenser is to be installed.

[0080] The positioning and mounting groove 116, the baffle 121 and the cover plate 122 are coordinated in the following manner: the symmetrical axis is passed through the specific positioning and mounting groove 116, so that the combination of the baffle 121 and the cover plate 122 forms a fixed orientation relative to the groove; during assembly, the groove is aligned with the shell reference to automatically ensure that the sealed space 21 is accurately positioned on the liquid distributor side, and the open space 22 is simultaneously located on the opposite side, thereby realizing directional control of the asymmetric distribution of the refrigeration oil and the center of gravity compensation.

[0081] In a specific embodiment, the bottom edge of the second body 114 is provided with a mounting foot 117. The core benefit of directly integrating the mounting foot 117 into the bottom peripheral area of ​​the second body 114 is that it significantly improves the installation stability of the entire machine by shortening the force transmission path between the mounting fulcrum and the compressor center of gravity compensation structure (i.e., the asymmetrically distributed sealed space 21 and open space 22). The mounting foot 117 serves as the only rigid connection point between the compressor and the external system. Its direct integration design with the second body 114 not only avoids the overturning moment caused by the center of gravity offset in traditional shell installation methods, but also directly transmits the refrigeration oil counterweight adjustment effect inside the lower cover assembly to the installation foundation, simultaneously solving the problems of vibration conduction and stress concentration, while simplifying the assembly level of the entire machine.

[0082] When the lower cover assembly is assembled to the compressor, the positioning mounting groove 116 is aligned with the shell reference so that the sealed space 21 enclosed by the baffle 121 and the cover plate 122 is precisely oriented to the installation side of the liquid dispenser. During the operation of the compressor, the refrigerant oil flows freely into the open space 22 for storage, while the sealed space 21 remains in a cavity state due to physical isolation. This asymmetric distribution allows the lower cover to form a counterweight structure in which "the side where the liquid dispenser is located is light (the sealed space 21 has no oil) and the other side is heavy (the open space 22 stores oil)". The center of gravity automatically shifts away from the liquid dispenser to compensate for the deviation in the center of gravity of the entire machine caused by the weight of the liquid dispenser and the refrigerant. At the same time, the mounting foot 117 integrated at the bottom of the second body 114 directly transmits the compensated center of gravity position to the installation foundation to eliminate the overturning moment.

[0083] In this embodiment, the center of gravity of the entire machine returns to the central axis of the pump body through forced asymmetric oil distribution in the sealed space 21 and the open space 22, completely eliminating the wear of parts and vibration noise sources caused by eccentric operation; the direct integrated design of the mounting foot 117 and the second body 114 transmits the counterweight effect to the mounting base with zero loss, solving the problems of uneven force on the foot and stress concentration on the piping due to the offset of the center of gravity in the traditional structure; the positioning mounting groove 116 realizes circumferential self-positioning of the lower cover assembly, ensuring the directional accuracy of the sealed space 21; the split first body 113 and the second body 114 and the detachable design of the connecting unit 115 take into account both volume expandability and maintenance convenience.

[0084] Example 2:

[0085] This embodiment provides a compressor, such as Figure 29 and 30 As shown, the compressor includes a shell assembly 5, a pump body assembly 3, a liquid separator 4 and the lower cover assembly 1 described in Example 1. The lower cover assembly 1 is installed on the bottom of the shell assembly 5 through a positioning installation groove 116. The pump body assembly 3 is arranged in the shell assembly 5. The shell assembly 5 has a liquid separator installation side. The liquid separator 4 is arranged on the liquid separator installation side, and the sealed space 21 faces the liquid separator installation side.

[0086] The shell assembly 5 serves as the basic structure, wrapping around the pump body assembly 3 and connecting to the lower cover assembly 1. A positioning reference is provided at its bottom, cooperating with the positioning mounting groove 116 of the lower cover assembly 1 to achieve circumferential locking. The pump body assembly 3 is coaxially fixed to the center position inside the shell assembly 5. The dispenser 4 is mounted on the dispenser mounting side defined by the side wall of the shell assembly 5 via a bracket. The lower cover assembly 1 is mounted on the bottom of the shell assembly 5, with its sealed space 21 strictly facing the dispenser mounting side, and the open space 22 on the opposite side, forming a spatial orientation linkage. The shell assembly 5 provides structural support and mounting reference for the entire machine. The pump body assembly 3 serves as the core power unit to perform refrigerant compression. The dispenser 4 stores and distributes refrigerant. The lower cover assembly 1 actively adjusts the center of gravity of the entire machine and transfers the load to the mounting foot 117 through the asymmetric distribution of the sealed space 21 and the open space 22.

[0087] When the weight of the liquid distributor 4 shifts the center of gravity of the entire machine toward the installation side, the sealed space 21 of the lower cover assembly 1 is precisely located on the same side, while the open space 22 stores oil on the opposite side, generating a counterweight torque. This torque is transmitted to the rotation center of the pump body assembly 3 through the housing assembly 5, returning the combined center of gravity to the axis. Simultaneously, the mounting feet 117 integrated into the lower cover assembly 1 directly bear the compensating load, eliminating the vibration amplification, installation inclination, and piping stress problems caused by the center of gravity offset in traditional structures, achieving noise and vibration reduction and improving reliability. The structure of the pump body assembly 3 mainly includes a crankshaft 31, a muffler 32, an upper flange 33, a cylinder 34, a roller 35, a lower flange 36, a slide 37, and a spring 38.

[0088] In a specific embodiment, when the edge of the lower cover body 11 is provided with at least three circumferentially evenly distributed positioning and mounting grooves 116, the space between the baffle 121 and the cover plate 122 is symmetrical about one of the positioning and mounting grooves 116; one of the positioning and mounting grooves 116 is coaxially aligned with the intake pipe of the shell assembly 5, and its symmetry center line is parallel to the center line of the liquid distributor installation side; one of the positioning and mounting grooves 116 is configured to be installed in the direction of the liquid distributor 4, and the space between the baffle 121 and the cover plate 122 is symmetrically distributed at both ends of the compressor body.

[0089] The central axis of the positioning installation groove 116 coincides with the center line of the suction pipe of the shell assembly 5, and its own symmetry plane is parallel to the longitudinal center plane of the liquid dispenser installation side. The core effect of this spatial relationship is to achieve triple precision positioning: through the coaxial alignment of the suction pipe, the circumferential installation reference of the lower cover assembly 1 is ensured to be consistent with the fluid system; through the parallel design of the symmetrical center line, the dividing surface of the baffle 121 and the cover plate 122 combination is precisely aligned with the direction of gravity of the liquid dispenser 4, ensuring that the light area generated by the sealed space 21 completely covers the side projection area of ​​the liquid dispenser, and simultaneously making the heavy area of ​​the open space 22 accurately act on the opposite side center of gravity compensation line, eliminating the compensation torque deflection problem caused by the angular assembly error of the traditional structure.

[0090] During installation, the positioning groove 116 must be opened so that it faces the liquid distributor 4. At the same time, the sealed space 21 enclosed by the baffle 121 and the cover plate 122 is distributed in a mirror-symmetrical manner at both ends of the compressor's axial direction. The core effect of this configuration is to establish a three-dimensional spatial compensation balance: the axial symmetry ensures that the lightweight effect of the sealed space 21 acts evenly along the entire length of the rotation axis of the pump body assembly 3, avoiding local bending moments; the radial direction toward the liquid distributor 4 ensures that the lightweight area is completely collinear with the liquid distributor's gravity source. The two work together to achieve uniform transmission of the center of gravity compensation torque throughout the entire space, completely suppressing the additional vibration harmonics caused by asymmetric compensation.

[0091] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous technical features can be freely combined and superimposed.

[0092] The above are merely preferred embodiments of the present invention and do not constitute any form of limitation to the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A lower cover assembly, characterized in that: The lower cover assembly is used for a compressor, which has a liquid distributor mounting side. The lower cover assembly includes a lower cover body and a partition unit. The partition unit is arranged in the lower cover body and divides the internal space of the lower cover body into a sealed space and an open space; wherein, the sealed space cannot accommodate refrigeration oil, and the open space can accommodate refrigeration oil, and when the compressor is installed, the sealed space faces the liquid distributor mounting side.

2. The lower cover assembly according to claim 1, wherein: The partition unit includes a baffle and a cover plate. The baffle is installed on the lower cover body. The cover plate covers the baffle and the lower cover body to form the sealed space.

3. The lower cover assembly according to claim 2, characterized in that: The lower cover body is provided with a baffle mounting groove and a cover plate mounting groove, the baffle is fixed in the baffle mounting groove, and the cover plate is fixed in the cover plate mounting groove.

4. The lower cover assembly according to claim 3, characterized in that: The baffle and the lower cover body, and the cover plate, the baffle and the lower cover body are sealed by welding or sealing glue.

5. The lower cover assembly according to claim 2, characterized in that: The lower cover body includes a first body, a second body and a connecting unit. The first body and the second body are arranged opposite to each other up and down and connected by the connecting unit. The partition unit is arranged on the first body and / or the second body.

6. The lower cover assembly according to claim 5, characterized in that: The first body is provided with an upper baffle mounting groove and a cover plate mounting groove, the second body is provided with a lower baffle mounting groove, the baffle is fixed in the upper baffle mounting groove and the lower baffle mounting groove, and the cover plate is fixed in the cover plate mounting groove.

7. The lower cover assembly according to claim 5, characterized in that: The connecting unit includes a protrusion and a groove, wherein the protrusion is provided at the lower end of the first body, and the groove is provided at the upper end of the second body, and the protrusion and the groove cooperate to realize the detachable connection between the first body and the second body.

8. The lower cover assembly according to claim 2, wherein: The edge of the lower cover body is provided with at least three circumferentially evenly distributed positioning and mounting grooves, and the space between the baffle and the cover plate is symmetrical about one of the positioning and mounting grooves.

9. The lower cover assembly according to claim 5, characterized in that: The bottom edge of the second body is provided with a mounting foot.

10. A compressor, characterized in that: The compressor includes a shell assembly, a pump body assembly, a liquid separator and the lower cover assembly according to any one of claims 1 to 9, the lower cover assembly is installed on the bottom of the shell assembly through a positioning mounting groove, the pump body assembly is arranged in the shell assembly, the shell assembly has a liquid separator installation side, the liquid separator is arranged on the liquid separator installation side, and the sealed space faces the liquid separator installation side.

11. The compressor according to claim 10, characterized in that When the edge of the lower cover body is provided with at least three circumferentially evenly distributed positioning and mounting grooves, and the space between the baffle and the cover plate is symmetrical about one of the positioning and mounting grooves; one of the positioning and mounting grooves is coaxially aligned with the intake pipe of the shell assembly, and its symmetry center line is parallel to the center line of the installation side of the liquid distributor; one of the positioning and mounting grooves is configured to be installed in the direction of the liquid distributor, and the space between the baffle and the cover plate is symmetrically distributed at both ends of the compressor body.

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