A compressor exhaust assembly, compressor and refrigeration apparatus

Abstract

The application discloses a compressor exhaust assembly, a compressor and a refrigeration device, which comprise an exhaust silencer and an inner exhaust pipe, the exhaust silencer is internally provided with a silencing cavity, the exhaust silencer is provided with an air inlet communicating with the silencing cavity, the bottom of the exhaust silencer is provided with a downwardly extending oil storage groove, the exhaust silencer is provided with a first inner exhaust pipe mounting hole at the groove bottom of the oil storage groove, the inner exhaust pipe is mounted in the first inner exhaust pipe mounting hole, the air inlet end of the inner exhaust pipe extends into the silencing cavity through the first inner exhaust pipe mounting hole, and the pipe wall of the inner exhaust pipe is provided with a drain hole communicating with the bottom of the oil storage groove. A large amount of refrigeration oil trapped in the exhaust silencer is collected in the oil storage groove, the refrigeration oil in the oil storage groove at the bottom of the exhaust silencer is discharged through the drain hole arranged on the inner exhaust pipe, the normal oil circulation of the compressor is ensured, and the reliability of the compressor is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of compressors, and in particular to a compressor exhaust assembly, a compressor, and a refrigeration device. Background Technology

[0002] The compressors of refrigeration equipment such as household refrigerators typically consist of a core and a housing. The core comprises a motor and a pump body. The compressor pump body has a cylinder head and a cylinder seat. Driven by the motor, the moving parts of the core rotate at high speed. To ensure reliable lubrication of the moving parts, refrigerant oil needs to be injected into the compressor housing. The oil pump drives the refrigerant oil to splash onto the friction pairs of moving parts such as connecting rods and pistons to achieve good lubrication. Therefore, it is necessary to ensure that the compressor oil circulation is normal. Household refrigerator compressors are mainly reciprocating piston compressors. One of the characteristics of reciprocating compressors is a high compression ratio, so the refrigerant temperature is very high after being compressed in the cylinder. The high-temperature, high-pressure refrigerant gas flows out from the valve plate exhaust port, enters the aluminum cylinder head, and then enters the metal exhaust muffler. Strong heat conduction occurs throughout this process, transferring heat to the space inside the compressor housing. Through heat conduction and convection heat transfer, harmful heat is absorbed by the refrigerant gas in the internal cavity of the housing, creating a strong superheating effect. This leads to an increase in the compressor suction temperature, resulting in harmful suction superheat, which seriously affects the compressor suction efficiency and reduces the compressor's cooling capacity and coefficient of performance.

[0003] To mitigate the effects of overheating on the exhaust side, plastic exhaust mufflers are typically used to reduce harmful heat transfer. However, these mufflers are usually quite large, trapping a significant amount of refrigeration oil. This reduces the amount of oil circulating in the compressor, preventing effective lubrication and potentially leading to wear and seizure.

[0004] The exhaust process of a reciprocating compressor is periodic, resulting in strong exhaust pulsations. Existing plastic exhaust mufflers, in an attempt to mitigate these pulsations, typically incorporate a throttling structure, which generates significant flow resistance and drastically reduces compressor performance. Summary of the Invention

[0005] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a compressor exhaust assembly, a compressor, and a refrigeration device.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] In a first aspect, a compressor exhaust assembly includes an exhaust muffler and an internal exhaust pipe. The exhaust muffler has an internal silencing chamber and an air inlet communicating with the silencing chamber. The bottom of the exhaust muffler has a downwardly extending oil reservoir. The bottom of the oil reservoir has a first internal exhaust pipe mounting hole. The internal exhaust pipe is installed in the first internal exhaust pipe mounting hole. The air inlet end of the internal exhaust pipe extends through the first internal exhaust pipe mounting hole and into the silencing chamber. The wall of the internal exhaust pipe has an oil drain hole communicating with the bottom of the oil reservoir.

[0008] In conjunction with the first aspect, in some implementations of the first aspect, the exhaust muffler is provided with a partition that divides the muffler cavity into multiple chambers of different volumes, and the partition is provided with a channel.

[0009] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the partition includes a first partition and a second partition, the first partition and the second partition dividing the silencing cavity into a first chamber, a second chamber and a third chamber, the first partition having a first channel connecting the first chamber and the second chamber, the second partition having a second channel connecting the second chamber and the third chamber, the first channel and the second channel being staggered, and the air inlet and the first internal exhaust pipe mounting hole being located in the first chamber.

[0010] In combination with the first aspect and the above-described implementations, in some implementations of the first aspect, the second partition is provided with a second internal exhaust pipe mounting hole, the internal exhaust pipe extends from the first internal exhaust pipe mounting hole into the first chamber, the internal exhaust pipe extends through the first channel of the first partition into the second chamber and is then inserted into the second internal exhaust pipe mounting hole, and the first partition limits the internal exhaust pipe to the second internal exhaust pipe mounting hole at the first channel.

[0011] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the exhaust muffler is provided with a mounting plate inside the air inlet, the mounting plate is provided with a positioning hole, the internal exhaust pipe extends into the first chamber through the first internal exhaust pipe mounting hole, the internal exhaust pipe extends inward to the top of the first chamber and is inserted into the positioning hole, and the air inlet is simultaneously connected to the first chamber and the internal exhaust pipe.

[0012] In conjunction with the first aspect and the above-described implementations, in some implementations of the first aspect, the exhaust muffler includes an upper cover and a bottom cover. The upper cover has a top recess with a bottom opening, and the top recess has a first upper partition and a second upper partition extending downwards. The first upper partition and the second upper partition divide the internal space of the upper cover into a first upper chamber, a second upper chamber, and a third upper chamber. The bottom cover has a bottom recess with a top opening, and the bottom recess has a first lower partition and a second lower partition extending upwards. The first lower partition and the second lower partition divide the internal space of the bottom cover into a first lower chamber and a second lower chamber. The upper cover and the lower cover are connected and define the silencing cavity inside. The first upper partition and the first lower partition cooperate to form the first partition, the second upper partition and the second lower partition cooperate to form the second partition, the first upper chamber and the first lower chamber form the first chamber, the second upper chamber and the second lower chamber form the second chamber, and the third upper chamber and the third lower chamber form the third chamber. The second internal exhaust pipe mounting hole is an inclined hole provided in the first lower partition, and the extension line of the second internal exhaust pipe mounting hole extends upward to avoid the top edge of the lower cover.

[0013] In combination with the first aspect and the above-mentioned implementation methods, in some implementation methods of the first aspect, the upper cover is made of black plastic, the bottom cover is made of light-transmitting plastic, the top of the bottom cover is provided with a mounting step extending circumferentially along the top opening, the bottom opening of the upper cover is fitted to the mounting step and fastened by infrared laser welding, the internal exhaust pipe is made of black plastic, and the internal exhaust pipe is fastened to the first internal exhaust pipe mounting hole by infrared laser welding.

[0014] In combination with the first aspect and the above-mentioned implementation methods, some implementation methods of the first aspect also include a cylinder head, which is integrally manufactured with the upper cover, and the air intake is disposed on the upper cover and communicates with the cylinder head to form an exhaust passage.

[0015] In a second aspect, a compressor includes a compressor exhaust assembly as described in any implementation of the first aspect.

[0016] Thirdly, a refrigeration device comprising a compressor as described in any implementation of the second aspect.

[0017] One of the above technical solutions has at least one of the following advantages or beneficial effects: In the technical solution of the present invention, after the high-temperature and high-pressure refrigerant gas enters the exhaust muffler through the inlet, the exhaust pulsation is eliminated through the muffler cavity, reducing exhaust noise. Simultaneously, the inner exhaust pipe extends inside the exhaust muffler, guiding the airflow out, reducing flow resistance, improving exhaust efficiency, and enhancing compressor performance. During this process, a large amount of refrigeration oil trapped by the exhaust muffler collects in the oil reservoir. The present invention, by providing an oil drain hole on the inner exhaust pipe, drains the refrigeration oil from the oil reservoir at the bottom of the exhaust muffler, ensuring normal compressor oil circulation and greatly improving compressor reliability.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the compressor of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of an embodiment of the compressor exhaust assembly of the present invention;

[0022] Figure 3 yes Figure 2 A schematic diagram of the external structure of the bottom cover in the embodiment shown;

[0023] Figure 4 yes Figure 2 A schematic diagram of the internal structure of the bottom cover in the embodiment shown;

[0024] Figure 5 yes Figure 2 A schematic diagram of the second internal exhaust pipe mounting hole structure in the embodiment shown;

[0025] Figure 6 yes Figure 2 A schematic diagram of the upper cover structure of the embodiment shown;

[0026] Figure 7 This is a schematic diagram of another embodiment of the compressor exhaust assembly of the present invention;

[0027] Figure 8 yes Figure 7 The schematic diagram of the cylinder head and upper cover structure of the embodiment shown is shown.

[0028] Figure 9 yes Figure 7 A schematic diagram of the positioning hole structure in the embodiment shown;

[0029] Figure 10 yes Figure 7 A schematic diagram of the bottom cover structure of the embodiment shown. Detailed Implementation

[0030] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0031] In this invention, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this invention, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0032] In this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number. In the description of this invention, the terms "first" and "second" are used only to distinguish technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0033] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention based on the specific content of the technical solution.

[0034] in, Figure 2 and Figure 7 The reference direction coordinate system of this invention is given below, in conjunction with... Figure 2 and Figure 7 The directions shown illustrate embodiments of the present invention.

[0035] See Figure 1 An embodiment of the present invention provides a compressor exhaust assembly, wherein the exhaust muffler can be designed with an irregular shape to maintain a reasonable distance from the inner surface of the compressor housing, the intake muffler, the cylinder seat, etc.

[0036] Specifically, see his 1. Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 The compressor exhaust assembly includes an exhaust muffler 100 and an internal exhaust pipe 200. The exhaust muffler 100 has an internal silencing chamber and an air inlet 101 that communicates with the silencing chamber. The air inlet 101 is used to introduce high-temperature and high-pressure refrigerant gas into the silencing chamber. The bottom of the exhaust muffler 100 has a downward-extending oil storage tank 102 with a certain depth. A large amount of refrigeration oil trapped by the exhaust muffler 100 is collected in the oil storage tank 102. When the compressor is working, the refrigeration oil is discharged with the refrigerant gas flow and accumulates in the inner cavity of the exhaust muffler 100, and is stored in the oil storage tank 102 of the bottom cover. The exhaust muffler 100 has a first internal exhaust pipe mounting hole 103 at the bottom of the oil storage tank 102. The internal exhaust pipe 200 is installed in the first internal exhaust pipe mounting hole 103. The air inlet end of the internal exhaust pipe 200 extends through the first internal exhaust pipe mounting hole 103 and enters the muffler cavity. The pipe wall of the internal exhaust pipe 200 has an oil drain hole 201 that communicates with the bottom of the oil storage tank 102. The oil drain hole 201 is used to drain the refrigeration oil collected in the bottom cover oil storage tank 102, ensuring that the refrigeration oil circulation is normal and avoiding the situation where the refrigeration oil is trapped.

[0037] Combination Figure 2 , Figure 7 In the technical solution of this invention, the high-temperature and high-pressure refrigerant gas enters the exhaust muffler 100 through the inlet 101, and the exhaust pulsation is eliminated through the muffler cavity, reducing exhaust noise. Simultaneously, the inner exhaust pipe 200 extends inside the exhaust muffler 100, guiding airflow out, reducing flow resistance, improving exhaust efficiency, and enhancing compressor performance. During this process, a large amount of refrigeration oil trapped in the exhaust muffler 100 collects in the oil reservoir 102. This invention, by providing an oil drain hole 201 on the inner exhaust pipe 200, drains the refrigeration oil from the oil reservoir 102 at the bottom of the exhaust muffler 100, ensuring normal compressor oil circulation and greatly improving compressor reliability.

[0038] In some embodiments, the diameter of the drain hole 201 is φ0.1mm to φ1.5mm.

[0039] In some embodiments, see Figure 2 , Figure 3 The exhaust muffler 100 forms an outwardly extending boss 104 at the position of the first internal exhaust pipe mounting hole 103, which increases the length of the first internal exhaust pipe mounting hole 103, thereby increasing the connection length of the internal exhaust pipe 200 in the first internal exhaust pipe mounting hole 103 and improving the stability and sealing of the connection between the internal exhaust pipe 200 and the exhaust muffler 100.

[0040] In some embodiments, see Figure 2 , Figure 7 The exhaust muffler 100 has an internal partition that divides the muffler chamber into multiple chambers of different volumes. The partition has channels through which refrigerant gas entering the exhaust muffler 100 can pass into the chambers of different volumes. The varying internal volumes of the chambers allow for noise reduction and silencing of exhaust noise at different frequencies.

[0041] Furthermore, in some embodiments, see Figure 2 , Figure 7 The partition includes a first partition 105 and a second partition 106, which divide the silencing chamber into a first chamber 107, a second chamber 108, and a third chamber 109. The second chamber 108 is located between the first chamber 107 and the third chamber 109. The first partition 105 has a first channel 110 connecting the first chamber 107 and the second chamber 108, and the second partition 106 has a second channel 111 connecting the second chamber 108 and the third chamber 109. The first channel 110 and the second channel 111 are staggered, forming a labyrinth structure. The internal volumes of the first chamber 107, the second chamber 108, and the third chamber 109 are different, which reduces exhaust noise at different frequencies. Furthermore, the staggered first channel 110 and the second channel 111 form a labyrinth structure, which helps to eliminate exhaust pulsation. The air inlet 101 and the first internal exhaust pipe mounting hole 103 are located in the first chamber 107.

[0042] Furthermore, in some embodiments, the exhaust muffler 100 includes an upper cover 112 and a bottom cover 113, see [reference needed]. Figure 2 , Figure 6 , Figure 7 , Figure 9 The top cover 112 has a dome structure and a top cavity with a bottom opening. The top cavity has a first upper partition 114 and a second upper partition 115 extending to the bottom. The first upper partition 114 and the second upper partition 115 have different heights, forming a maze structure. The first upper partition 114 and the second upper partition 115 divide the internal space of the top cover 112 into a first upper chamber 116, a second upper chamber 117 and a third upper chamber 118. The internal volume of each chamber is different, which has a noise reduction and sound absorption effect on exhaust noise of different frequencies.

[0043] See Figure 2 , Figure 4 , Figure 7 , Figure 10 The bottom cover 113 has a bottom recess with a top opening. A first lower partition 119 and a second lower partition 120 extending upwards are provided within the bottom recess. The heights of the first lower partition 119 and the second lower partition 120 are different, for example, in... Figure 4In the illustrated embodiment, the first lower partition 119 is closer to the first internal exhaust pipe mounting hole 103 and has a smaller height, while the second lower partition 120 is farther away from the first internal exhaust pipe mounting hole 103 and has a larger height. The first lower partition 119 and the second lower partition 120 divide the internal space of the bottom cover 113 into a first lower chamber 121, a second lower chamber 122, and a third lower chamber 123. The upper cover 112 and the bottom cover 113 are connected and define a silencing cavity inside. The first upper partition 114 and the first lower partition 119 cooperate to form the first partition 105, and the second upper partition 115 and the second lower partition 120 cooperate to form the second partition 106. The first upper chamber 116 and the first lower chamber 121 form the first chamber 107, the second upper chamber 117 and the second lower chamber 122 form the second chamber 108, and the third upper chamber 118 and the third lower chamber 123 form the third chamber 109, which serves to reduce exhaust pulsation. The different internal volumes of each chamber reduce and silence exhaust noise at different frequencies.

[0044] In some embodiments, see Figures 2-6 The second partition 106 is provided with a second internal exhaust pipe mounting hole 124. The internal exhaust pipe 200 extends from the first internal exhaust pipe mounting hole 103 into the first chamber 107. The internal exhaust pipe 200 passes through the first channel 110 of the first partition 105 and extends into the second chamber 108 before being inserted into the second internal exhaust pipe mounting hole 124. The first partition 105 limits the internal exhaust pipe 200 to the second internal exhaust pipe mounting hole 124 at the first channel 110.

[0045] Combination Figure 2 The arrows indicate the flow path of the refrigerant gas. When the compressor is working, the refrigerant gas enters the first chamber 107 of the exhaust muffler 100 from the cylinder head, flows around the bottom of the first baffle 105 into the second chamber 108, then flows around the top of the second baffle 106 into the third chamber 109, and finally descends into the internal exhaust pipe 200, completing the exhaust process. During the airflow process, passing through the first chamber 107, the second chamber 108, and the third chamber 109 with different volumes, exhaust pulsation and exhaust noise are effectively reduced. At the same time, the refrigeration oil is collected and discharged through the oil drain hole of the plastic internal exhaust pipe 200, ensuring normal oil circulation.

[0046] See Figure 5 The second internal exhaust pipe mounting hole 124 is an inclined hole provided in the first lower partition 119. The extension line of the second internal exhaust pipe mounting hole 124 extends upward to avoid the top edge of the bottom cover 113 so that the mold core pulling can be carried out smoothly.

[0047] In some embodiments, see Figures 7-10The exhaust muffler 100 has a mounting plate 125 on the inner side of the air inlet 101. The mounting plate 125 has a positioning hole 126 for mounting and positioning the inner exhaust pipe 200. The inner exhaust pipe 200 extends into the first chamber 107 through the first inner exhaust pipe mounting hole 103. The inner exhaust pipe 200 extends inward to the top of the first chamber 107 and is inserted into the positioning hole 126. The air inlet 101 is simultaneously connected to the first chamber 107 and the inner exhaust pipe 200.

[0048] Combination Figure 7 The airflow exiting from the cylinder head can directly enter the internal exhaust pipe 200 and be discharged directly, avoiding airflow bypassing, reducing flow resistance losses, and improving compressor exhaust efficiency. Simultaneously, the exhaust pulsation beam in the cylinder head passes through the intake port 101 of the exhaust muffler 100 and enters the first chamber 107. After the first attenuation, it bypasses the bottom of the first baffle 105 and enters the second chamber 108, undergoing a second attenuation. Then, it bypasses the top of the second baffle 106 and enters the third chamber 109, undergoing a third attenuation. Ultimately, the peak value of the exhaust pulsation beam is significantly attenuated, effectively reducing exhaust noise. Because it is the transmission and bypassing of the exhaust pulsation beam that eliminates airflow pulsation energy, it does not create resistance to airflow. Therefore, airflow loss is zero, significantly improving exhaust efficiency and effectively enhancing compressor performance.

[0049] The top cover 112 and the bottom cover 113 can be connected by means of adhesive bonding, fastener connection, etc.

[0050] In some embodiments, see Figure 2 , Figure 7 The top cover 112 is made of black plastic, and the bottom cover 113 is made of translucent plastic. The bottom cover 113 has a mounting step 127 extending circumferentially along the top opening. The bottom opening of the top cover 112 is fitted to the mounting step 127 and fastened by infrared laser welding. During welding, the infrared beam penetrates the translucent bottom cover 113, and the heat is concentrated at the end of the top cover 112, causing the plastic surface to melt. After cooling, the welding is completed. The infrared laser welding is strong, and the compressor has high performance and low noise.

[0051] The internal exhaust pipe 200 is made of black plastic and is fastened to the first internal exhaust pipe mounting hole 103 by infrared laser welding. During welding, the infrared beam penetrates the light-transmitting bottom cover 113, and the heat is concentrated on the surface of the black plastic internal exhaust pipe 200, causing the plastic surface to melt. After cooling, the welding is completed. The infrared laser welding is firm, and the compressor has high performance and low noise.

[0052] In some embodiments, see Figures 6-9The compressor exhaust assembly also includes a cylinder head 300, which is integrally formed with the upper cover 112. An intake port 101 is located on the upper cover 112 and communicates with the cylinder head 300 to form an exhaust passage. The cylinder head 300 and the upper cover 112 are made of plastic as a single unit, which can improve the overheating effect on the exhaust side and reduce harmful heat transfer.

[0053] This invention features a simple structure, precise positioning of the plastic inner exhaust pipe 200, excellent exhaust noise reduction, effective protection of compressor oil circulation, strong infrared laser welding, and high compressor performance with low noise.

[0054] Embodiments of the present invention also provide a compressor, including the compressor exhaust assembly of any of the above embodiments.

[0055] Embodiments of the present invention also provide a refrigeration device, including the compressor described in any of the above embodiments. The refrigeration device includes refrigerators, air conditioners, etc.

[0056] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0057] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A compressor exhaust assembly, characterized by, The device includes an exhaust muffler and an internal exhaust pipe. The exhaust muffler has an internal silencing chamber and an air inlet communicating with the silencing chamber. The bottom of the exhaust muffler has a downward-extending oil reservoir. The bottom of the oil reservoir has a first internal exhaust pipe mounting hole. The internal exhaust pipe is installed in the first internal exhaust pipe mounting hole. The air inlet end of the internal exhaust pipe extends through the first internal exhaust pipe mounting hole and enters the silencing chamber. The pipe wall of the internal exhaust pipe has an oil drain hole communicating with the bottom of the oil reservoir.

2. The compressor exhaust assembly of claim 1, wherein, The exhaust muffler has a partition inside, which divides the muffler cavity into multiple chambers with different volumes. The partition has a channel.

3. The compressor exhaust assembly of claim 2, wherein, The partition includes a first partition and a second partition, which divide the silencing cavity into a first chamber, a second chamber, and a third chamber. The first partition has a first channel connecting the first chamber and the second chamber, and the second partition has a second channel connecting the second chamber and the third chamber. The first channel and the second channel are staggered, and the air inlet and the first internal exhaust pipe mounting hole are located in the first chamber.

4. The compressor exhaust assembly of claim 3, wherein, The second partition is provided with a second internal exhaust pipe mounting hole. The internal exhaust pipe extends from the first internal exhaust pipe mounting hole into the first chamber. After passing through the first channel of the first partition and extending into the second chamber, the internal exhaust pipe is inserted into the second internal exhaust pipe mounting hole. The first partition limits the internal exhaust pipe to the second internal exhaust pipe mounting hole at the first channel.

5. The compressor exhaust assembly of claim 3, wherein, The exhaust muffler has a mounting plate inside the air inlet, and the mounting plate has a positioning hole. The internal exhaust pipe extends from the first internal exhaust pipe mounting hole into the first chamber. The internal exhaust pipe extends inward to the top of the first chamber and is inserted into the positioning hole. The air inlet is simultaneously connected to the first chamber and the internal exhaust pipe.

6. The compressor exhaust assembly of claim 4, wherein, The exhaust muffler comprises an upper cover and a bottom cover, the upper cover is provided with a top cavity with a bottom opening, a first upper partition plate and a second upper partition plate extending to the bottom are arranged in the top cavity, the first upper partition plate and the second upper partition plate divide the internal space of the upper cover into a first upper chamber, a second upper chamber and a third upper chamber, the bottom cover is provided with a bottom cavity with a top opening, a first lower partition plate and a second lower partition plate extending to the top are arranged in the bottom cavity, the first lower partition plate and the second lower partition plate divide the internal space of the bottom cover into a first lower chamber, a second lower chamber and a third lower chamber, the upper cover and the bottom cover are connected and define the muffling cavity inside, the first upper partition plate and the first lower partition plate cooperate to form the first partition plate, the second upper partition plate and the second lower partition plate cooperate to form the second partition plate, the first upper chamber and the first lower chamber form the first chamber, the second upper chamber and the second lower chamber form the second chamber, the third upper chamber and the third lower chamber form the third chamber, the second inner exhaust pipe mounting hole is an inclined hole arranged on the first lower partition plate, and the extension line of the second inner exhaust pipe mounting hole is upwardly away from the top edge of the bottom cover.

7. The compressor exhaust assembly of claim 6, wherein, The upper cover is made of black plastic, the bottom cover is made of light-transmitting plastic, the top of the bottom cover is provided with a mounting step extending along the circumference of the top opening, the bottom opening of the upper cover is fitted on the mounting step and is fastened by infrared laser welding, the inner exhaust pipe is made of black plastic, and the inner exhaust pipe is fastened to the first inner exhaust pipe mounting hole by infrared laser welding.

8. The compressor exhaust assembly of claim 7, wherein, The exhaust muffler further comprises a cylinder cover, the cylinder cover is integrally made with the upper cover, the air inlet is arranged on the upper cover, and the air inlet communicates with the cylinder cover to form an exhaust passage.

9. A compressor characterized by, The compressor exhaust assembly comprises the compressor exhaust assembly of any one of claims 1-8.

10. A refrigeration appliance characterized in that, The compressor comprises the compressor of claim 9.

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