Mounting structure and method for lower silencer of horizontal compressor

Abstract

The invention relates to the technical field of compressors, and particularly discloses a mounting structure and method for a lower silencer of a horizontal compressor, bolt holes for assembling a lower cylinder cover and the lower silencer are separately arranged, that is, the lower cylinder cover and the lower silencer are respectively fixed by adopting a first mounting hole and a second mounting hole which are independent; the assembling technological process is remarkably simplified, and the assembling efficiency is improved. Besides, due to the structural characteristics of the lower silencer, the required torque value is relatively low when the lower silencer is assembled, the lower silencer can be correspondingly fixed through manual assembly, tool equipment specially used for assembling the lower silencer does not need to be additionally arranged, the operation difficulty in the assembly process is further reduced, and the installation efficiency and convenience of the lower silencer are improved. And the risk of part damage caused by improper torque is reduced, so that the quality and the reliability of overall assembly are improved.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to an installation structure and method for a lower silencer of a horizontal compressor. Background Technology

[0002] Currently, compressors are classified into horizontal compressors and vertical compressors based on their installation method. Horizontal compressors are widely used in refrigerators, air conditioners, and other applications due to their advantages such as low center of gravity and low vibration. The lower silencer is a key component in horizontal compressors used to reduce exhaust noise. Compared to vertical compressors, horizontal compressors have an additional oil suction pipe structure in their lower silencer, commonly referred to as an oil suction hood. Due to this design difference, horizontal compressors cannot be assembled with the lower cylinder head and oil suction hood as a single unit as vertical compressors. This characteristic necessitates step-by-step or independent installation procedures for related components in the assembly process of horizontal compressors to ensure proper connection and sealing performance between the oil suction hood and the lower cylinder head, thereby guaranteeing the overall stability and reliability of the compressor's operation.

[0003] The existing assembly scheme for the lower silencer of a horizontal compressor is usually as follows: first, the lower cylinder head is assembled to the pump body using several concentric bolts. After the rotor is pressed in and its positioning is ensured, another set of bolts is used to assemble the lower silencer (i.e., the oil suction hood) to the pump body. However, this assembly method has obvious shortcomings: on the one hand, the assembly process of the lower silencer and the lower cylinder head needs to share the same set of assembly equipment. This not only places higher demands on the machining accuracy, positioning function, and assembly torque of the assembly equipment, but may also lead to excessive occupation of equipment resources, affecting overall production efficiency. On the other hand, the lower silencer is fixed with only a small number of bolts, and the bolts are not evenly distributed, which can easily lead to uneven stress during assembly, resulting in poor sealing or even leakage problems. For horizontal compressors, if refrigerant leakage occurs inside the lower silencer, it will directly affect the compressor's working performance and significantly shorten its service life.

[0004] Therefore, there is an urgent need for an installation structure and method for the lower silencer of a horizontal compressor to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide an installation structure and method for a lower silencer of a horizontal compressor, which can effectively improve the assembly efficiency and convenience of the lower silencer of a horizontal compressor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] On one hand, the present invention provides an installation structure for a lower silencer of a horizontal compressor, comprising:

[0008] The lower cylinder head has multiple first mounting holes.

[0009] The lower muffler has multiple second mounting holes, and the first mounting holes and the second mounting holes are arranged radially offset along the lower cylinder head.

[0010] Multiple first bolts are provided, each first bolt corresponding to a multiple first mounting hole, and each first bolt passes through the corresponding first mounting hole and is connected to the pump body section of the horizontal compressor.

[0011] Multiple second bolts are provided, each corresponding to a multiple second mounting hole, and each second bolt passes through the corresponding second mounting hole and is connected to the lower cylinder head.

[0012] As a preferred technical solution for the mounting structure of the lower muffler of the above-mentioned horizontal compressor, the center of the lower muffler and the center of the lower cylinder head are located on the same axis. A plurality of first mounting holes are evenly distributed along the circumference of the lower cylinder head, and the center of the plurality of first mounting holes is located on a first segment circle with a diameter of PCD1. A plurality of second mounting holes are evenly distributed along the circumference of the lower muffler, and the center of the plurality of second mounting holes is located on a second segment circle with a diameter of PCD2. The outer diameter of the lower cylinder head is D1, wherein D1, PCD1 and PCD2 satisfy: PCD1 < PCD2 < D1.

[0013] As a preferred technical solution for the installation structure of the lower silencer of the above-mentioned horizontal compressor, the lower silencer has an internal cavity with an inner diameter of D2 and a diameter of D3 for the head of the first bolt. D2, PCD1 and D3 satisfy: D2 > PCD1 + D3.

[0014] As a preferred technical solution for the installation structure of the lower muffler of the above-mentioned horizontal compressor, the lower cylinder head includes a cylinder head body and a plurality of first lugs. The plurality of first lugs protrude circumferentially from the outer peripheral wall of the cylinder head body. The plurality of first mounting holes are opened in the cylinder head body. The lower muffler includes a cover and a plurality of second lugs. The plurality of second lugs protrude circumferentially from the outer peripheral wall of the cover. The plurality of second mounting holes are opened one-to-one with the second lugs. The plurality of second lugs and the plurality of first lugs are axially corresponding to each other. The second bolt passes through the second mounting hole and is connected to the corresponding first lug.

[0015] As a preferred technical solution for the installation structure of the lower muffler of the above-mentioned horizontal compressor, the lower muffler has a downward flange protruding from its outer periphery toward the lower cylinder head. The downward flange is attached to the outer peripheral wall of the lower cylinder head. The thickness of the lower muffler is t, the height of the lower cylinder head is h1, and the height of the downward flange is h2. Wherein, h1, t and h2 satisfy: t < h2 ≤ (t + 0.8h1).

[0016] As a preferred technical solution for the installation structure of the lower silencer of the above-mentioned horizontal compressor, the length of the second bolt is h3, wherein h1, t and h3 satisfy: t<h3≤(t+0.5h1).

[0017] As a preferred technical solution for the installation structure of the lower silencer of the above-mentioned horizontal compressor, the pump body section is encapsulated in the housing of the horizontal compressor. The pump body section includes an upper cylinder, a lower cylinder, an intermediate plate and an upper cylinder cover. The intermediate plate is encapsulated between the upper cylinder and the lower cylinder. The upper cylinder and the lower cylinder are encapsulated between the upper cylinder cover and the lower cylinder cover. The first bolt passes through the first mounting hole, the lower cylinder and the intermediate plate in sequence, and is connected to the upper cylinder.

[0018] As a preferred technical solution for the installation structure of the lower muffler of the above-mentioned horizontal compressor, the outer diameter of both the lower cylinder and the upper cylinder is D, and the outer diameter of the lower muffler is D4, wherein D, D4 and D1 satisfy: D<D1≤D4.

[0019] As a preferred technical solution for the installation structure of the lower muffler of the above-mentioned horizontal compressor, the lower muffler has a convex ring portion, the convex ring portion is provided with an inner hole, the lower cylinder head is provided with a journal, and the hole wall of the inner hole is interference-fitted with the outer wall of the journal.

[0020] On the other hand, the present invention also provides an installation method for a horizontal compressor lower silencer, applicable to the installation structure of the horizontal compressor lower silencer in any of the above-mentioned solutions, comprising the following steps:

[0021] S100: The lower cylinder head is assembled to the pump body section using multiple first bolts;

[0022] S200: The rotor of the horizontal compressor is pressed in;

[0023] S300: The lower muffler is assembled to the lower cylinder head by means of a plurality of the second bolts.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention provides an installation structure and method for a lower muffler of a horizontal compressor. The installation structure includes a lower cylinder head, a lower muffler, multiple first bolts, and multiple second bolts. The lower cylinder head has multiple first mounting holes, and the lower muffler has multiple second mounting holes. The first and second mounting holes are radially staggered along the lower cylinder head. Each of the first bolts corresponds to one of the first mounting holes, with the first bolts passing through the first mounting holes and connecting to the pump body section of the horizontal compressor. Similarly, each of the second bolts corresponds to one of the second mounting holes, with the second bolts passing through the second mounting holes and connecting to the lower cylinder head. This arrangement separates the bolt holes used for assembling the lower cylinder head and the lower muffler, meaning each is fixed using independent first and second mounting holes, significantly simplifying the assembly process and improving assembly efficiency. Furthermore, due to the structural characteristics of the lower muffler, the torque required for its assembly is relatively low, and it can be fixed manually without the need for additional tooling equipment specifically for assembling the lower muffler. This further reduces the operational difficulty during the assembly process, improves its installation efficiency and convenience, and helps reduce the risk of component damage caused by improper torque, thereby improving the overall assembly quality and reliability. Attached Figure Description

[0026] Figure 1 A cross-sectional view of the horizontal compressor provided by the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the horizontal compressor provided by the present invention;

[0028] Figure 3 Cross-sectional view of the mounting structure of the lower silencer of the horizontal compressor provided by the present invention. Figure 1 ;

[0029] Figure 4 A cross-sectional view of the lower cylinder head provided by the present invention;

[0030] Figure 5 A schematic diagram of the lower cylinder head provided by the present invention. Figure 1 ;

[0031] Figure 6 A schematic diagram of the lower cylinder head provided by the present invention. Figure 2 ;

[0032] Figure 7 Schematic diagram of the lower muffler provided by the present invention Figure 1 ;

[0033] Figure 8 Schematic diagram of the lower muffler provided by the present invention Figure 2 ;

[0034] Figure 9Cross-sectional view of the mounting structure of the lower silencer of the horizontal compressor provided by the present invention. Figure 2 .

[0035] in:

[0036] 1. Lower cylinder head; 101. Cylinder head body; 102. First lug; 111. First mounting hole;

[0037] 2. Lower silencer; 201. Cover; 202. Second lug; 211. Second mounting hole; 212. Cavity;

[0038] 3. First bolt; 4. Second bolt; 5. Lower flange; 6. Housing; 7. Upper cylinder; 8. Lower cylinder; 9. Intermediate plate; 10. Upper cylinder head; 11. Raised ring; 12. Journal; 13. Upper muffler; 14. First flow hole; 15. Second flow hole. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0041] Unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0042] Unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0044] like Figures 1 to 9 As shown, this embodiment provides an installation structure for a lower muffler of a horizontal compressor. The installation structure includes: a lower cylinder head 1, a lower muffler 2, multiple first bolts 3 and multiple second bolts 4. The lower cylinder head 1 has multiple first mounting holes 111, and the lower muffler 2 has multiple second mounting holes 211. The first mounting holes 111 and the second mounting holes 211 are arranged radially offset along the lower cylinder head 1. The multiple first bolts 3 are correspondingly set with the multiple first mounting holes 111, and each first bolt 3 passes through the corresponding first mounting hole 111 and is connected to the pump body section of the horizontal compressor. The multiple second bolts 4 are correspondingly set with the multiple second mounting holes 211, and each second bolt 4 passes through the corresponding second mounting hole 211 and is connected to the lower cylinder head 1. This design differs from the existing assembly method where the lower cylinder head 1 and lower muffler 2 share a single set of bolt holes. Instead, the bolt holes for assembling the lower cylinder head 1 and lower muffler 2 are separated, with each using its own independent first mounting hole 111 and second mounting hole 211 for fixation. This significantly simplifies the assembly process and improves assembly efficiency. Furthermore, due to the structural characteristics of the lower muffler 2, the torque required for its assembly is relatively low, allowing for manual assembly without the need for additional tooling. This further reduces the operational difficulty during assembly, improves installation efficiency and convenience, and helps reduce the risk of component damage due to improper torque, thereby enhancing overall assembly quality and reliability.

[0045] Alternatively, please refer to the appendix. Figure 2As shown, the center of the lower muffler 2 and the center of the lower cylinder head 1 are on the same axis. Multiple first mounting holes 111 are evenly distributed along the circumference of the lower cylinder head 1, and the center of the multiple first mounting holes 111 is located on the first section circle with a diameter of PCD1. Multiple second mounting holes 211 are evenly distributed along the circumference of the lower muffler 2, and the center of the multiple second mounting holes 211 is located on the second section circle with a diameter of PCD2. The outer diameter of the lower cylinder head 1 is D1, where D1, PCD1 and PCD2 satisfy: PCD1 < PCD2 < D1. This configuration, by optimizing the spatial layout of the first mounting hole 111 and the second mounting hole 211, evenly distributes the clamping force, increases the effective contact area, and forms a more continuous sealing ring, thereby significantly improving the end-face sealing performance and reducing the risk of lubricating oil or working medium leakage from the joint. It also provides more usable space for the installation of the lower cylinder head 1 and the lower muffler 2, enabling separate assembly of the two components. Furthermore, during assembly, the aforementioned dimensional differences facilitate precise positioning and installation by operators, reducing assembly difficulty and improving production efficiency. The smaller pitch circle diameter also reduces uneven bolt stress, resulting in a more reasonable load distribution among the bolts, thus extending the service life of the bolts and connections and improving the overall system reliability.

[0046] In this embodiment, there are four first bolts 3 and four second bolts 4. Of course, in other embodiments, the number of first bolts 3 and two bolts 4 can be set according to actual needs, and no further limitation is made here.

[0047] Alternatively, please refer to the appendix. Figure 3 As shown, the lower muffler 2 has a cavity 212. The cavity 212 forms a sufficiently concave accommodating cavity or flared structure in the area corresponding to the axial distribution of the first bolts 3. The inner diameter of the cavity 212 is D2, and the diameter of the head of the first bolt 3 is D3. D2, PCD1, and D3 satisfy: D2 > PCD1 + D3. This setting allows for precise design and positioning of relevant structural components. Through reasonable layout, the cavity 212 of the lower muffler 2 effectively covers all the first bolts 3. This ensures assembly stability while providing dust and impact protection for the connection parts of the first bolts 3, avoiding potential safety hazards or performance impacts caused by exposed first bolts 3. This enhances the durability and safety of the structure. It not only avoids interference from external protruding parts on the airflow field and acoustic performance but also helps maintain the flatness and integrity of the compressor's external structural outline. Furthermore, it effectively increases the volume of the cavity 212, resulting in a significant improvement in noise levels.

[0048] In this embodiment, the pump body section is encapsulated within the housing 6 of the horizontal compressor. The pump body section includes an upper cylinder 7, a lower cylinder 8, an intermediate plate 9, and an upper cylinder head 10. The intermediate plate 9 is encapsulated between the upper cylinder 7 and the lower cylinder 8. The upper cylinder 7 and the lower cylinder 8 are encapsulated between the upper cylinder head 10 and the lower cylinder head 10. The upper muffler 13 is installed to the upper cylinder head 10. The first bolt 3 passes through the first mounting hole 111, the lower cylinder 8, and the intermediate plate 9 in sequence, and is connected to the upper cylinder 7. The inner diameter of the housing 6 is D0, and the outer diameters of the lower cylinder 8 and the upper cylinder 7 are both D, wherein D, D1, and D0 satisfy: D < D1 ≤ D0. Of course, in other embodiments, the pump body section can also be configured with a single cylinder.

[0049] Optionally, the outer diameter of the lower muffler 2 is D4, where D1, D4, and D0 satisfy: D1≤D4<D0. With this setting, the outer diameter of the lower muffler 2 should not be less than the outer diameter of the lower cylinder head 1 to ensure the compatibility and sealing performance of the two during assembly, prevent leakage or functional failure due to insufficient size, and ensure that the lower muffler 2 can completely cover and tightly fit the outer circular surface of the lower cylinder head 1.

[0050] Optionally, the lower muffler 2 has a convex ring portion 11, which is located at the center of the cover 201 and has an inner hole. The lower cylinder head 1 has a protruding journal 12, and the inner hole wall is interference-fitted with the outer wall of the journal 12. The interference fit can directly form a high-strength, gapless physical connection. This fit causes the end face of the journal 12 to undergo radial elastic deformation after being pressed into the convex ring portion 11 of the lower muffler 2, thereby establishing continuous compressive stress and friction on the contact surface. This not only effectively resists axial displacement and circumferential rotation, ensuring accurate structural positioning and reliable connection, but also forms a continuous physical barrier on the sealing interface, significantly preventing lubricating oil leakage.

[0051] It should be noted that if the outer diameter of the lower cylinder head 1 is large, in order to ensure good flow of refrigerant gas and oil inside the housing 6, several first flow holes 14 can be added to the lower cylinder head 1. The size of the first flow holes 14 should be as large as possible while ensuring the mounting surface of the first bolt 3. At the same time, several second flow holes corresponding to the first flow holes 14 are added to the lower muffler 2. However, it is not required that the outer circular surface design of the lower cylinder head 1 be the same as the end face design of the lower muffler 2.

[0052] Specifically, this embodiment provides the following exemplary technical solution: Please refer to the appendix. Figures 5 to 8As shown, to further meet the space constraints of the small shell diameter and reduce manufacturing costs, the lower cylinder head 1 includes a cylinder head body 101 and a plurality of first lugs 102. The cylinder head body 101 is disc-shaped, with a journal 12 protruding from the center of the cylinder head body 101. The plurality of first lugs 102 protrude from the outer peripheral wall of the cylinder head body 101, and a plurality of first mounting holes 111 are formed in the cylinder head body 101. The lower muffler 2 includes a cover 201 and a plurality of second lugs 202. The plurality of second lugs 202 protrude circumferentially from the outer peripheral wall of the cover 201, and a plurality of second mounting holes 211 are formed one-to-one with the plurality of second lugs. The plurality of second lugs 202 and the plurality of first lugs 102 are axially corresponding to each other. The second bolt 4 passes through the second mounting hole 211 and is connected to the corresponding first lug 102. Further, there are four first lugs 102, which are evenly arranged circumferentially.

[0053] Alternatively, please refer to the appendix. Figure 9 As shown, the lower muffler 2 has a lower flange 5 protruding from its outer periphery toward the lower cylinder head 1. The lower flange 5 is attached to the outer peripheral wall of the lower cylinder head 1. This arrangement can effectively enhance the sealing between the two by tightly fitting the lower flange 5 with the outer peripheral wall of the lower cylinder head 1, reducing noise leakage and gas leakage caused by gaps, thereby improving the overall system's quietness and operational stability.

[0054] It should be noted that this embodiment does not limit the continuity of the lower flange 5. The lower flange 5 does not have to adopt the traditional continuous folding edge, but can be designed as a segmented intermittent folding edge or a corrugated structure according to specific needs.

[0055] In this embodiment, the thickness of the lower muffler 2 is t, the height of the lower cylinder head 1 is h1, and the height of the lower flange 5 is h2, wherein h1, t and h2 satisfy: t < h2 ≤ (h1 + t).

[0056] Furthermore, t < h2 ≤ (t + 0.8h1), where t < h2, fundamentally stipulates that the lower flange 5 must exist and be effective, ensuring that the height of the lower flange 5 must be greater than the thickness of the lower muffler 2, thereby forming an annular wrapping structure with sufficient sidewall height. This allows the lower flange 5 to provide a stable contact surface with the outer peripheral wall of the lower cylinder head 1 and provides the necessary space for the installation (such as O-ring grooves, gasket pressing surfaces) or welding of related sealing elements. Meanwhile, h2 ≤ 4(h1 + t) / 5 ensures that the lower flange 5 does not extend beyond the bottom of the lower cylinder head 1. This forcibly reserves a theoretical space of up to 20% of the height of the cylinder head body 101 as an assembly safety margin. While ensuring assembly accuracy, this further avoids unnecessary interference with other components during installation or use, reduces the risk of damage, and improves the durability and safety of the product. Furthermore, this structure provides a clear design space for the dimensional tolerance allocation of each related part, allowing the parts to be assembled in a qualified manner within a certain tolerance range. It optimizes the overall assembly process of the lower muffler 2 and the lower cylinder head 1, simplifies the installation steps, improves production efficiency, and ensures the adaptability and reliability of the compressor under different operating conditions.

[0057] Furthermore, in order to ensure that the second bolt 4 is fixed only inside the lower cylinder head 1 and that the length of the second bolt 4 does not exceed the contact end face between the lower cylinder head 1 and the lower cylinder 8, so as to avoid interference with other structural components during assembly, the bolt length of the second bolt 4 is h3, where h1, t and h3 satisfy: t < h3 ≤ (h1 + t), which realizes axial compression and fixation, and its length constraint ensures the effectiveness of the connection and internal safety.

[0058] Furthermore, t < h3 ≤ (t + 0.5h1). This setting, by limiting the length of the second bolt 4 to no more than half of the total structural height (h1 + t), achieves a dual effect: on the one hand, this length restriction ensures that the second bolt 4 can be connected by countersunk head or blind hole screwing in from one side, making the non-operating side surface flat, optimizing the internal flow field and simplifying assembly; on the other hand, this restriction forces at least half of the axial space to be reserved for the internal functional structures (such as the muffler cavity and airflow channel) of the lower cylinder head 1 and the lower muffler 2, thereby maximizing the aerodynamic performance and space utilization efficiency of the compressor while meeting the fastening requirements.

[0059] It should be noted that, in order to save costs and reduce changes in process tooling, the outer circular end face of the lower cylinder head 1, which is larger than that of the lower cylinder 8, can retain the original blank shape and does not require finishing processing. The height h1 of the cylinder head body 101 is less than h. That is, the finishing surface of the lower cylinder head 1 is still a circular surface with a diameter of D, the same as the finishing surface of the lower cylinder 8, and the same set of machining equipment can be used without additional modification to the equipment.

[0060] This embodiment also provides an installation method for a horizontal compressor lower silencer, applicable to the installation structure of the horizontal compressor lower silencer in the above scheme, including the following steps:

[0061] S100: First, use the upper eccentric bolts to fix the upper cylinder head 10 and the upper cylinder 7, then use the lower eccentric bolts to assemble the intermediate plate 9 and the lower cylinder 8, and then use multiple first bolts 3 to assemble the lower cylinder head 1 to the pump body section.

[0062] S200: The rotor of the horizontal compressor.

[0063] S300: The lower muffler 2 is manually assembled to the lower cylinder head 1 using multiple second bolts 4.

[0064] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An installation structure for a lower silencer of a horizontal compressor, characterized in that, include: The lower cylinder head (1) has a plurality of first mounting holes (111) on it. The lower muffler (2) has a plurality of second mounting holes (211) provided on it. The first mounting hole (111) and the second mounting hole (211) are arranged radially offset from each other along the lower cylinder head (1). Multiple first bolts (3) are provided one-to-one with multiple first mounting holes (111), and each first bolt (3) passes through the corresponding first mounting hole (111) and is connected to the pump body section of the horizontal compressor. Multiple second bolts (4) are provided one-to-one with multiple second mounting holes (211), and each second bolt (4) passes through the corresponding second mounting hole (211) and is connected to the lower cylinder head (1).

2. The installation structure of the lower silencer of the horizontal compressor according to claim 1, characterized in that, The center of the lower muffler (2) and the center of the lower cylinder head (1) are on the same axis. A plurality of first mounting holes (111) are evenly distributed along the circumference of the lower cylinder head (1), and the center of the plurality of first mounting holes (111) is located on the first section circle, the diameter of the first section circle is PCD1. A plurality of second mounting holes (211) are evenly distributed along the circumference of the lower muffler (2), and the center of the plurality of second mounting holes (211) is located on the second section circle, the diameter of the second section circle is PCD2. The outer diameter of the lower cylinder head (1) is D1, wherein D1, PCD1 and PCD2 satisfy: PCD1 < PCD2 < D1.

3. The installation structure of the lower silencer of the horizontal compressor according to claim 2, characterized in that, The lower muffler (2) has a cavity (212) with an inner diameter of D2 and the head of the first bolt (3) has a diameter of D3. D2, PCD1 and D3 satisfy: D2 > PCD1 + D3.

4. The installation structure of the lower silencer of the horizontal compressor according to claim 1, characterized in that, The lower cylinder head (1) includes a cylinder head body (101) and a plurality of first lugs (102). The plurality of first lugs (102) protrude circumferentially on the outer peripheral wall of the cylinder head body (101). A plurality of first mounting holes (111) are opened in the cylinder head body (101). The lower muffler (2) includes a cover (201) and a plurality of second lugs (202). The plurality of second lugs (202) protrude circumferentially on the outer peripheral wall of the cover (201). A plurality of second mounting holes (211) are opened one-to-one with the plurality of second lugs (202). The plurality of second lugs (202) and the plurality of first lugs (102) are axially corresponding to each other. The second bolt (4) passes through the second mounting hole (211) and is connected to the corresponding first lug (102).

5. The installation structure of the lower silencer of the horizontal compressor according to claim 1, characterized in that, The lower muffler (2) has a lower flange (5) protruding from its outer periphery toward the lower cylinder head (1). The lower flange (5) is attached to the outer peripheral wall of the lower cylinder head (1). The thickness of the lower muffler (2) is t, the height of the lower cylinder head (1) is h1, and the height of the lower flange (5) is h2. Wherein, h1, t and h2 satisfy: t < h2 ≤ (t + 0.8h1).

6. The installation structure of the lower silencer of the horizontal compressor according to claim 5, characterized in that, The length of the second bolt (4) is h3, where h1, t and h3 satisfy: t < h3 ≤ (t + 0.5h1).

7. The installation structure of the lower silencer of the horizontal compressor according to claim 2, characterized in that, The pump body section is encapsulated within the housing (6) of the horizontal compressor. The pump body section includes an upper cylinder (7), a lower cylinder (8), an intermediate plate (9), and an upper cylinder cover (10). The intermediate plate (9) is encapsulated between the upper cylinder (7) and the lower cylinder (8). The upper cylinder (7) and the lower cylinder (8) are encapsulated between the upper cylinder cover (10) and the lower cylinder cover (1). The first bolt (3) passes through the first mounting hole (111), the lower cylinder (8), and the intermediate plate (9) in sequence, and is connected to the upper cylinder (7).

8. The installation structure of the lower silencer of the horizontal compressor according to claim 7, characterized in that, The outer diameters of the lower cylinder (8) and the upper cylinder (7) are both D, and the outer diameter of the lower muffler (2) is D4, wherein D, D4 and D1 satisfy: D < D1 ≤ D4.

9. The mounting structure of the lower silencer of the horizontal compressor according to any one of claims 1-8, characterized in that, The lower muffler (2) has a convex ring (11) with an inner hole. The lower cylinder head (1) has a journal (12) protruding from it. The inner hole wall is interference-fitted with the outer wall of the journal (12).

10. A method for installing a lower silencer on a horizontal compressor, characterized in that, The mounting structure applicable to the lower silencer of the horizontal compressor according to any one of claims 1-9 includes the following steps: S100: The lower cylinder head (1) is assembled to the pump body section by means of multiple first bolts (3); S200: The rotor of the horizontal compressor is pressed in; S300: The lower muffler (2) is assembled to the lower cylinder head (1) by means of a plurality of second bolts (4).

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