Compressor silencing structure of mobile air conditioner

Abstract

The invention relates to the technical field of mobile air conditioners, and discloses a compressor silencing structure of a mobile air conditioner. The compressor is installed on the base plate and comprises an outer cover with an upper opening and a lower opening and a top cover covering the top of the outer cover, the bottom of the outer cover is connected with the base plate in a sealed and clamped mode, the base plate, the outer cover and the top cover jointly surround the compressor to form a sealed cavity, an air exhaust nozzle is arranged on the outer cover or the top cover, and vacuumizing equipment extracts air in the sealed cavity through the air exhaust nozzle. And a vacuum state is formed in the sealing cavity. According to the silencing structure provided by the invention, the compressor is surrounded by the chassis, the outer cover and the top cover to form the sealing cavity, and the gas in the sealing cavity is extracted through the air extraction nozzle by utilizing the vacuumizing equipment, so that a vacuum state is formed in the sealing cavity, a sound transmission path is fundamentally cut off through a vacuum environment, and full-band noise is eliminated. The noise reduction device has an excellent effect of inhibiting noise, particularly low-frequency noise, can greatly reduce the noise intensity, effectively improves the noise reduction amount, and can meet the mute requirement of a higher standard.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile air conditioners, and in particular to a compressor silencing structure of a mobile air conditioner. Background Art

[0002] As integrated portable refrigeration devices, mobile air conditioners generate significant noise during operation due to mechanical vibration, refrigerant pulsation, and electromagnetic interference. Particularly in enclosed indoor environments, the persistent low- and medium-frequency noise can severely disrupt user comfort. Existing technologies generally employ passive sound insulation solutions to mitigate this issue, but these solutions still have significant drawbacks.

[0003] At present, the mainstream noise reduction methods focus on the application of physical sound insulation materials. For example, patent CN212511498U discloses that the compressor body is wrapped with multiple layers of sound insulation cotton and the sound insulation layer is extended to the front panel area, and the sound-absorbing material is used to block the noise propagation path. Similarly, patent CN222317253U proposes the use of a silicone sound insulation chamber and a connecting tube to form a closed silent cavity, and the elastic sealing structure is used to suppress noise leakage. Although this solution can reduce the intensity of high-frequency noise, its inherent defects are: (1) When the sound insulation material is in rigid contact with the compressor housing, it is easy to produce resonant vibration, resulting in secondary noise amplification; (2) The porous sound-absorbing material's absorption efficiency for low-frequency noise with a longer wavelength drops sharply, and there is still a perceptible buzzing sound when the background noise in the late night environment is lower than 35dB.

[0004] Further research revealed that traditional sound insulation layers only achieve a noise reduction of approximately 15-20dB, with the reduction being less than 5dB at low frequencies below 315Hz. Despite attempts to add damping foam layers to piping systems or employ non-contact sound insulation chambers, sound waves can still penetrate the sound insulation structure through solid conduction and air coupling, making it difficult to meet the required noise reduction requirements.

[0005] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a compressor silencer structure for a mobile air conditioner, which aims to use vacuum to cut off the noise of the compressor from propagating outward, so that the mobile air conditioner can meet the silent requirements.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A compressor silencer structure for a mobile air conditioner, wherein the compressor is mounted on a chassis and comprises an outer cover with upper and lower openings and a top cover covering the top of the outer cover. The bottom of the outer cover is sealed and clamped with the chassis. The chassis, outer cover and top cover together surround the compressor to form a sealed cavity. An exhaust nozzle is provided on the outer cover or the top cover, and a vacuum device extracts gas from the sealed cavity through the exhaust nozzle to form a vacuum state in the sealed cavity.

[0009] As a further improvement of the above technical solution, a first connecting pipe and a second connecting pipe connecting the inside and outside of the outer cover are welded on the outer cover, the first connecting pipe is welded to the intake pipe of the compressor, and the second connecting pipe is welded to the exhaust pipe of the compressor.

[0010] As a further improvement of the above technical solution, an airtight terminal is provided on the top cover, and the power terminal on the compressor is connected to the airtight terminal.

[0011] As a further improvement of the above technical solution, a first sealing ring is provided on the bottom edge of the outer cover, and a first card groove for the first sealing ring to be embedded is provided on the chassis; a second sealing ring is provided on the top edge of the outer cover, and a second card groove for the second sealing ring to be embedded is provided on the top cover.

[0012] As a further improvement of the above technical solution, the chassis is provided with a pull-down structure for driving the top cover and the outer cover to be pressed downwards toward the chassis to form a tight connection.

[0013] As a further improvement of the above technical solution, the pull-down structure includes a fastener and two pull ears arranged on the chassis, the two pull ears pull the bottom of the fastener, and provide a downward pulling force when the fastener is buckled on the top of the top cover.

[0014] As a further improvement of the above technical solution, the fastener includes an inward-bent rod, two vertical rods respectively arranged at both ends of the inward-bent rod, and two hooks respectively arranged at the bottom ends of the two vertical rods. The hooks hook the corresponding pull ears, and the top cover is provided with a protrusion that limits the inward-bent rod from detaching from the top cover.

[0015] As a further improvement of the above technical solution, the middle portion of the vertical rod is bent to form a reinforcement section.

[0016] As a further improvement of the above technical solution, mounting holes are provided at the corners of the bottom plate of the compressor, and the chassis is provided with shock-absorbing feet with the same number as the mounting holes and corresponding one to one.

[0017] As a further improvement of the above technical solution, the top of the top cover is provided with an avoidance convex top and a plurality of reinforcing ribs are provided at the connection between the avoidance convex top and the top surface of the sealing cover.

[0018] Beneficial effects of the present invention: The compressor silencer structure provided by the present invention surrounds the compressor through the chassis, outer cover and top cover to form a sealed cavity, and uses a vacuum device to extract the gas in the sealed cavity through the suction nozzle, so that a vacuum state is formed in the sealed cavity. The propagation path of the compressor noise is fundamentally cut off through the vacuum environment, and it has an excellent suppressive effect on the full-band noise, especially the low-frequency noise. It can greatly reduce the noise intensity of the compressor, effectively improve the noise reduction amount, meet higher standards of quietness requirements, and can effectively eliminate the perceptible buzzing sound in the late night environment, greatly improving the user's rest experience. Since there is no rigid contact between the sound insulation material and the compressor, no resonant vibration will be generated, and the generation of secondary noise is avoided from the source, ensuring the purity and efficiency of the silencer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional diagram showing the compressor installed on the chassis.

[0020] Figure 2 A perspective view of the outer cover.

[0021] Figure 3 A perspective view of the outer cover mounted on the chassis and forming a connection with the compressor.

[0022] Figure 4 This is an assembly diagram of the compressor silencer structure provided by the present invention.

[0023] Figure 5 Schematic diagram of the bottom structure of the top cover.

[0024] Explanation of the main component symbols: 1-outer cover, 11-exhaust nozzle, 12-first connecting pipe, 13-second connecting pipe, 14-first sealing ring, 15-second sealing ring, 2-top cover, 21-airtight terminal, 22-second slot, 23-protrusion, 24-avoidance convex top, 25-reinforcement rib, 3-sealed chamber, 4-compressor, 41-intake pipe, 42-exhaust pipe, 43-electrical terminal, 5-chassis, 51-first slot, 6-pull-down structure, 61-pull ear, 62-fastener, 621-inward bent rod, 622-vertical rod, 623-reinforcement section, 624-hook, 7-shock-absorbing support foot. DETAILED DESCRIPTION

[0025] The present invention provides a compressor silencer structure for a mobile air conditioner. To clarify the objectives, technical solutions, and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0026] See also Figures 1 to 4The compressor 4 is installed on the chassis 5. The present invention provides a compressor silencer structure for a mobile air conditioner, comprising an outer cover 1 with upper and lower openings, and a top cover 2 covering the top of the outer cover 1. The bottom of the outer cover 1 is sealed and clamped with the chassis 5. The chassis 5, the outer cover 1 and the top cover 2 jointly surround the compressor 4 to form a sealed cavity 3. An exhaust nozzle 11 is provided on the outer cover 1 or the top cover 2. A vacuum device extracts gas from the sealed cavity 3 through the exhaust nozzle 11, so that a vacuum state is formed in the sealed cavity 3.

[0027] The propagation of sound requires a medium, and its essence is the energy transfer through the vibration of the medium molecules. When the mobile air conditioner is running, the noise generated by the compressor 4 is propagated to the surroundings in the form of mechanical vibration, refrigerant pulsation and electromagnetic action, with the help of the vibration of air molecules. The silencer structure provided by the present invention surrounds the compressor 4 through the chassis 5, the outer cover 1 and the top cover 2 to form a sealed cavity 3, and uses a vacuum device to extract the gas in the sealed cavity 3 through the suction nozzle 11, so that a vacuum state is formed in the sealed cavity 3. Since there are almost no gas molecules in a vacuum, the sound loses the medium required for propagation and cannot be propagated through the air, thereby effectively blocking the spread of the noise of the compressor 4 to the external environment, and achieving isolation and suppression of the noise of the compressor 4.

[0028] The compressor silencer structure provided by the present invention creates a vacuum sealed chamber 3 design, which fundamentally cuts off the sound propagation path through the vacuum environment, overcoming the defect of traditional sound insulation materials in insufficient absorption of low-frequency noise, especially in the low-frequency band below 315Hz. Compared with the traditional physical sound insulation layer, which can only achieve a noise reduction of less than 5dB, it has an excellent suppression effect on full-band noise, especially low-frequency noise, and can greatly reduce the noise intensity, effectively improve the noise reduction, meet higher standards of quiet requirements, and can effectively eliminate the perceptible buzzing sound in the late night environment, greatly improving the user's rest experience. Since there is no rigid contact between the sound insulation material and the compressor 4, no resonant vibration will be generated, which avoids the generation of secondary noise from the source and ensures the purity and efficiency of the silencer.

[0029] Mobile air conditioners are often used in enclosed indoor environments, where users are more sensitive to noise. This noise-reduction structure effectively addresses the issue of compressor 4 operating noise. Whether used in noise-sensitive locations like bedrooms and offices, or in extremely low-background-noise environments like late at night, it significantly reduces the impact of compressor 4 noise on users, improving their rest and work experience, greatly expanding the applicable scenarios and user base of mobile air conditioners.

[0030] Specifically, a first pipe 12 and a second pipe 13 are welded to the outer cover 1, connecting the inside and outside of the outer cover 1. The first pipe 12 is welded to the intake pipe 41 of the compressor 4, and the second pipe 13 is welded to the exhaust pipe 42 of the compressor 4. This welding connection method forms a strong physical connection. Compared with other connection methods, such as snap connections and threaded connections, welding can avoid loosening caused by long-term vibration and ensure the stability of the entire refrigeration system piping connection. At the same time, the welding process can achieve a good sealing effect, prevent refrigerant leakage, ensure the normal operation of the mobile air conditioning refrigeration system, and avoid problems such as reduced cooling efficiency and equipment failure caused by refrigerant leakage.

[0031] In order to avoid the gaps between the suction pipe 41 and the exhaust pipe 42 of the compressor 4 and the outer cover 1 when the suction pipe 41 and the exhaust pipe 42 of the compressor 4 are led outward, which will affect the sealing performance of the sealed cavity 3 and be difficult to repair, thus affecting the vacuum silencing effect and the normal operation of the refrigeration system. Figure 2 As shown, the first pipe 12 and the second pipe 13 on the outer cover 1 are pre-set, and the connection between the first pipe 12 and the second pipe 13 and the outer cover 1 is tested for air tightness in advance. The compressor 4 is first installed to the designated position of the chassis 5 to complete the positioning and fixation of the compressor 4 itself. This process does not need to consider the interference of the outer cover 1 and the pipes, and the installer can focus on the precise installation of the compressor 4 and the chassis 5. After the compressor 4 is installed in place, the outer cover 1 with the prefabricated pipes is used to cover the compressor 4. At this time, it is only necessary to weld the first pipe 12 on the outer cover 1 to the compressor 4 intake pipe 41, and the second pipe 13 to the exhaust pipe 42, avoiding the complicated operation of handling the compressor 4, the outer cover 1 and the pipeline connection at the same time. This step-by-step installation method breaks down the originally complicated installation process into two relatively simple steps, greatly reducing the overall installation difficulty. Even relatively inexperienced installers can complete the installation task more easily.

[0032] In the silencer structure of the mobile air-conditioning compressor, the vacuum state of the sealed cavity 3 is the key to achieving efficient silencer. If the traditional circuit wiring method is adopted, when the power terminal 43 passes through the sealed cavity 3, it is very easy to leave a gap at the threading point, causing outside air to enter the sealed cavity 3, destroying the vacuum environment, and greatly reducing the silencer effect. For this reason, the top cover 2 is provided with an airtight terminal 21, and the airtight terminal 21 adopts a standardized design. The operation of connecting the power terminal 43 on the compressor 4 to the bottom of the airtight terminal 21 is simple and convenient. During the wiring stage, there is no need to worry about the impact on the sealed cavity 3 during the operation. The technicians can focus on the precise connection between the power terminal 43 and the bottom of the airtight terminal 21 to ensure the quality of the electrical connection. After the wiring is completed, the top cover 2 is covered. At this time, the airtight terminal 21, with its special sealing structure, closely cooperates with the top cover 2 to form a complete sealed protection at the connection point of the power terminal 43. Compared with the traditional method of installing the top cover 2 first and then connecting the wires, or performing complex wiring inside the sealed cavity 3, this operation mode fundamentally avoids the problems of gaps and damage in the sealed cavity 3 that may be caused by wiring operations, maintains the vacuum state of the sealed cavity 3 to the greatest extent, and ensures the noise reduction performance of the mobile air-conditioning compressor silencer structure.

[0033] To improve the sealing performance of the outer cover and the top cover, see Figure 2 and Figure 3 As shown, the bottom edge of the outer cover 1 is provided with a first sealing ring 14, and the chassis 5 is provided with a first card slot 51 for the first sealing ring 14 to be embedded; Figure 2 and Figure 5 As shown, a second sealing ring 15 is provided on the top edge of the outer cover 1, and a second card slot 22 for the second sealing ring 15 to be embedded in is provided on the top cover 2. With this arrangement, the sealing ring can fit tightly against the inner wall of the card slot through the elastic deformation, effectively filling the tiny gaps between the outer cover 1 and the chassis 5, and between the outer cover 1 and the top cover 2, and preventing gas from entering the sealing cavity 3 from the connection parts to achieve a good seal; it also provides additional connection constraints between the outer cover 1, the chassis 5 and the top cover 2 in terms of mechanical structure. When the mobile air conditioner is in operation, the vibration generated by the compressor 4 may cause an impact on the connection between the various components. After the sealing ring is embedded in the card slot, it can buffer the impact of the vibration to a certain extent, reduce the relative displacement between the components, and firmly connect the outer cover 1, the chassis 5 and the top cover 2, thereby enhancing the stability of the entire silencer structure.

[0034] In this embodiment, the chassis 5 is provided with a pull-down structure 6 for driving the top cover 2 and the outer cover 1 downward to press against the chassis 5 to form a tight connection. The pull-down structure 6 drives the top cover 2 and the outer cover 1 downward to press tightly against the chassis 5, so that the first sealing ring 14 cooperates with the first card slot 51 and the second sealing ring 15 cooperates with the second card slot 22 to form a synergistic effect. The tension applied by the pull-down structure 6 enables the sealing ring to undergo elastic deformation more fully, tightly filling all gaps between the card slot and the components. Compared with relying solely on the cooperation between the sealing ring and the card slot itself, the possibility of gas infiltration into the sealed cavity 3 is further eliminated. This enhanced sealing effect provides a more solid guarantee for maintaining the vacuum state in the sealed cavity 3, ensuring that the vacuum silencer structure is always in an efficient working state and effectively blocking the noise generated by the operation of the compressor 4 from leaking.

[0035] When the mobile air conditioner is in operation, the continuous vibrations generated by compressor 4 can impact the connecting structures of various components. The pull-down structure 6 tightly connects the top cover 2, outer cover 1, and chassis 5, forming a stable overall structure. During vibration transmission, the pressure exerted by the pull-down structure 6 can partially offset the separation force caused by vibration, reducing relative displacement between components and the risk of loosening.

[0036] Specifically, the pull-down structure 6 includes a fastener 62 and two pull ears 61 provided on the chassis 5. The two pull ears 61 pull the bottom of the fastener 62 to provide a downward pulling force when the fastener 62 is buckled on the top of the top cover 2. The pull-down structure 6 adopts the form of a fastener 62 and a pull ear 61, and the installation process is extremely intuitive and convenient. The installer only needs to pull the two pull ears 61 to hold the bottom of the fastener 62, and then buckle the fastener 62 on the top of the top cover 2 to quickly achieve the operation of pressing the top cover 2 and the outer cover 1 downward toward the chassis 5. Compared with other complex pull-down structures 6, this method does not require the use of additional tools or tedious adjustment steps, which greatly simplifies the installation process. Even installers who are new to the equipment can master the operation method in a short time, which greatly improves the installation efficiency. It is especially suitable for large-scale assembly line production scenarios and effectively reduces labor costs.

[0037] Furthermore, the fastener 62 includes an inward-curving rod 621, two vertical rods 622 disposed at either end of the inward-curving rod 621, and two hooks 624 disposed at the bottom ends of the vertical rods 622. The hooks 624 engage corresponding pull tabs 61. The top cover 2 is provided with a protrusion 23 that restricts the inward-curving rod 621 from disengaging from the top cover 2. The hooks 624 precisely engage the pull tabs 61, forming a secure mechanical connection. When the fastener 62 is fastened to the top cover 2, the inward-curving rod 621 presses downward on the top cover 2 and the outer cover 1. The hooking action of the hooks 624 and the pull tabs 61 effectively prevents the fastener 62 from disengaging upward during force application. At the same time, the vertical rods 622 enhance the vertical support of the structure, making the entire pull-down structure 6 more stable when transmitting downward force. Combined with the restriction exerted by the protrusion 23 on the top cover 2 on the inward-curving rod 621, a dual anti-detachment mechanism is formed. During long-term operation of the mobile air conditioner, even when subjected to strong vibration or external impact, fastener 62 will not easily detach. The hook 624 firmly engages the lug 61, preventing the fastener 62 from loosening upwards. The protrusion 23 restricts the lateral movement of the inner curved rod 621, preventing the fastener 62 from accidentally detaching. This anti-detachment design ensures that the pull-down structure 6 remains stable throughout the life of the device, maintaining the sealing of the sealed chamber 3 and the effectiveness of the muffler structure. This reduces the risk of equipment failure caused by the detachment of the fastener 62, thereby improving the reliability and service life of the mobile air conditioner.

[0038] Preferably, the middle portion of the vertical rod 622 is bent to form a reinforcement section 623; by changing the cross-sectional shape and stress distribution of the vertical rod 622, the bending and torsional resistance of the vertical rod 622 is greatly improved. During the operation of the fastener 62, the vertical rod 622 is subjected to the downward pressure from the inner bent rod 621 and the tensile force transmitted by the hook 624. The reinforcement section 623 can effectively disperse these loads and avoid deformation or breakage of the vertical rod 622 caused by stress concentration. Compared with the traditional straight rod structure, the presence of the reinforcement section 623 enables the vertical rod 622 to withstand greater external forces, ensuring that the fastener 62 maintains structural integrity during long-term use, and providing reliable support for the tight connection between the top cover 2, the outer cover 1 and the chassis 5, thereby maintaining the sealing of the sealed cavity 3 and the stability of the sound-absorbing structure.

[0039] Because a single set of pull-down structures 6 may result in excessive pressure on a portion of the top cover 2 due to a single stress point, while pressure is insufficient in other areas, leading to uneven sealing. Therefore, in this embodiment, two sets of pull-down structures 6 are used. Both ends of the top cover 2 are simultaneously subjected to downward force, resulting in a more even force distribution, effectively avoiding stress concentration and further strengthening the connection between the outer cover 1 and the chassis 5 and top cover 2. During operation of the mobile air conditioner, it can better resist the effects of compressor 4 vibration, prevent components from loosening due to uneven force, ensure that the sealed chamber 3 always maintains a good seal, and maintain the efficient operation of the vacuum silencer structure.

[0040] The corners of the bottom plate of the compressor 4 are provided with mounting holes, and the chassis 5 is provided with shock-absorbing feet 7 with the same number and one-to-one correspondence as the mounting holes. The shock-absorbing feet 7 prop up the compressor 4, avoiding direct contact between the compressor 4 and the chassis 5, and effectively blocking the solid sound transmission path generated by mechanical vibration when the compressor 4 is running. In the traditional design, the compressor 4 is rigidly connected to the chassis 5, and the vibration energy will be directly transmitted to the mobile air conditioner casing and the surrounding environment through the chassis 5, causing noise propagation. In this design, the shock-absorbing feet 7 themselves have good elastic buffering properties, which can absorb and attenuate the vibration energy transmitted by the compressor 4, reduce the transmission of vibration to the chassis 5 and the outside, and reduce the noise generated by vibration. At the same time, this non-direct contact design prevents the vibration of the compressor 4 from spreading rapidly through the solid medium, suppressing noise propagation at the source and significantly improving the quiet effect of the mobile air conditioner.

[0041] A silencer zone is formed between the compressor 4 and the chassis 5 due to the shock-absorbing feet 7. The noise transmitted from the compressor 4 to the chassis 5 cannot be transmitted outward due to the vacuum environment of the silencer zone, thereby preventing the noise from directly penetrating the chassis 5 and transmitting outward, greatly improving the overall noise reduction performance of the mobile air conditioner and creating a quieter usage environment for users.

[0042] Preferably, the top of the top cover 2 is provided with a relief protrusion 24. The design of the relief protrusion 24 provides sufficient clearance for protruding components 23 that may be present inside the mobile air conditioner (such as pipe joints and electrical components on the top of the compressor 4). During installation, these components are prevented from direct contact and compression with the top cover 2, preventing damage to the components due to installation collisions and ensuring the normal operation of the compressor 4 and related components.

[0043] Multiple reinforcing ribs 25 are provided at the junction between the convex top 24 and the top surface of the sealing cover, effectively enhancing the overall structural strength of the top cover 2. During operation, the top cover 2 is subject to various external forces, including the vacuum pressure within the sealed chamber 3 and external collisions. The reinforcing ribs 25 distribute the stress and disperse the pressure on the top cover 2, preventing stress concentration that could cause deformation or rupture of the top cover 2.

[0044] The actual assembly of the compressor silencer structure provided by the present invention is as follows: The compressor 4 is placed on the chassis 5, and the mounting holes at the corners of the compressor 4 bottom plate are precisely aligned with the shock-absorbing feet 7 on the chassis 5. The compressor 4 is then fixed to the shock-absorbing feet 7 using bolts or nuts. During this process, it is important to ensure that the compressor 4 is installed stably, avoiding tilting or deviation, to ensure its subsequent stability and reliability.

[0045] Cover the compressor 4 with the outer cover 1, align the first sealing ring 14 at the bottom edge of the outer cover 1 with the first card slot 51 on the chassis 5, and slowly press down the outer cover 1 so that the first sealing ring 14 is completely embedded in the first card slot 51, and a preliminary sealed connection is formed. Then weld the first connecting pipe 12 on the outer cover 1 to the suction pipe 41 of the compressor 4, and the second connecting pipe 13 to the exhaust pipe 42 of the compressor 4. Then take out the top cover 2, and connect the power terminal 43 on the compressor 4 to the bottom of the airtight terminal 21. During the connection process, it is necessary to strictly follow the electrical connection specifications to ensure that the wiring is firm and the contact is good, and to avoid problems such as looseness or short circuit. Cover the top cover 2 on the top of the outer cover 1, align the second sealing ring 15 at the top edge of the outer cover 1 with the second card slot 22 on the top cover 2, and slowly press down the top cover 2 so that the second sealing ring 15 is completely embedded in the second card slot 22, and a preliminary sealed connection between the top cover 2 and the outer cover 1 is completed. Align the hooks 624 of the fasteners 62 of the two sets of pull-down structures 6 with the pull ears 61 on the chassis 5, and then push the inner bent rods 621 of the fasteners 62 to the top surface of the top cover 2. The hooks 624 tightly hook the corresponding pull ears 61 to generate the downward pulling force, driving the top cover 2 and the outer cover 1 to press downward tightly against the chassis 5, further enhancing the sealing and stability of the connection parts. Finally, through the vacuum nozzle 11 set on the outer cover 1 or the top cover 2, connect the vacuum equipment to evacuate the sealed chamber 3. During the evacuation process, the vacuum degree in the sealed chamber 3 needs to be monitored in real time. When the predetermined vacuum state is reached, close the vacuum nozzle 11 to complete the assembly of the entire compressor silencer structure to ensure that the silencer structure can effectively block the noise generated by the operation of the compressor 4.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0047] 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 in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0048] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the scope of protection of the present invention.

Claims

1. A compressor silencing structure for a mobile air conditioner, wherein the compressor is mounted on a chassis, characterized in that: It includes an outer cover with upper and lower openings and a top cover covering the top of the outer cover. The bottom of the outer cover is sealed and clamped with the chassis. The chassis, outer cover and top cover together surround the compressor to form a sealed cavity. An exhaust nozzle is provided on the outer cover or the top cover. The vacuum equipment extracts the gas in the sealed cavity through the exhaust nozzle to form a vacuum state in the sealed cavity.

2. The compressor silencing structure of a mobile air conditioner according to claim 1, characterized in that: A first connecting pipe and a second connecting pipe communicating with the inside and outside of the outer cover are welded to the outer cover. The first connecting pipe is welded to the suction pipe of the compressor, and the second connecting pipe is welded to the exhaust pipe of the compressor.

3. The compressor silencing structure of a mobile air conditioner according to claim 1, characterized in that: The top cover is provided with an airtight terminal, and the power connection end on the compressor is connected to the airtight terminal.

4. The compressor silencing structure of a mobile air conditioner according to claim 1, characterized in that: The bottom edge of the outer cover is provided with a first sealing ring, and the bottom plate is provided with a first card slot for the first sealing ring to be embedded; the top edge of the outer cover is provided with a second sealing ring, and the top cover is provided with a second card slot for the second sealing ring to be embedded.

5. The compressor silencing structure of a mobile air conditioner according to claim 4, characterized in that: The chassis is provided with a pull-down structure for driving the top cover and the outer cover to be pressed downwards toward the chassis to form a tight connection.

6. The compressor silencing structure of a mobile air conditioner according to claim 5, characterized in that: The pull-down structure includes a fastener and two pull ears arranged on the bottom plate. The two pull ears pull the bottom of the fastener and provide a downward pulling force when the fastener is fastened to the top of the top cover.

7. The compressor silencing structure of a mobile air conditioner according to claim 6, characterized in that: The fastener includes an inward-bending rod, two vertical rods respectively arranged at both ends of the inward-bending rod, and two hooks respectively arranged at the bottom ends of the two vertical rods. The hooks hook the corresponding pull ears, and the top cover is provided with a protrusion that limits the inward-bending rod from detaching from the top cover.

8. The compressor silencing structure of a mobile air conditioner according to claim 7, characterized in that: The middle portion of the vertical rod is bent to form a reinforcement section.

9. The compressor silencing structure of a mobile air conditioner according to claim 1, characterized in that: The corners of the bottom plate of the compressor are provided with mounting holes, and the chassis is provided with shock-absorbing feet with the same number as the mounting holes and corresponding to each other.

10. The compressor silencing structure of a mobile air conditioner according to claim 1, characterized in that: The top of the top cover is provided with an avoidance convex top, and a plurality of reinforcing ribs are provided at the connection between the avoidance convex top and the top surface of the sealing cover.

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