Injection needle assembly, air supplementing structure and compressor

Abstract

The application provides an injection needle assembly, a gas supplementing structure and a compressor, and solves the problem that the gas supplementing device with a single channel has poor gas supplementing and enthalpy increasing effect on a double-cylinder compressor with different cylinder displacements. The needle body of the injection needle assembly is provided with at least a first gas supplementing channel and a second gas supplementing channel; when the needle body cooperates with the partition part arranged between the first cylinder and the second cylinder, the first gas supplementing channel is in communication with the first cylinder to guide the gas supplemented by the needle body to at least partially enter the first cylinder; and the second gas supplementing channel is in communication with the second cylinder to guide the gas supplemented by the needle body to at least partially enter the second cylinder; the gas supplementing structure comprises the partition part and the injection needle assembly; the compressor comprises the gas supplementing structure; when the injection needle assembly cooperates with the partition part, the gas supplementing effect and the energy efficiency of the compressor can be improved by supplementing the gas through the first gas supplementing channel or the second gas supplementing channel according to the cylinders with different displacements; and the applicability of the injection needle assembly is wider.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an injection needle assembly, a gas supplementing structure and a compressor. BACKGROUND

[0002] With the advancement of technology, users have higher and higher requirements for the energy efficiency of air conditioners, and the gas supplementing and enthalpy increasing technology can enable air conditioners to maintain high capacity and high energy efficiency in various environments. As the core component of air conditioners, the improvement of the gas supplementing and enthalpy increasing technology has become a major indicator.

[0003] The enthalpy increasing system directly injects refrigerant at an intermediate pressure into the compression chamber through an enthalpy increasing channel and mixes and compresses the refrigerant with high-temperature refrigerant in the compression chamber, thereby reducing the specific enthalpy of the evaporator inlet and increasing the discharge capacity of the compressor, so as to improve the heating capacity and energy efficiency of the system.

[0004] As Figure 1 described, Figure 1 is a structural diagram of a gas supplementing injection needle in the prior art. A communication hole 101 is arranged on a partition plate 10 between upper and lower cylinders, and the injection needle is arranged in the partition plate. The injection needle only includes a single existing gas supplementing channel 20, and the injected gas enters the corresponding communication hole of the partition plate through the gas outlet at the front end of the injection needle and then enters the cylinder.

[0005] The applicant finds that the prior art at least has the following technical problems: when the above-mentioned existing gas supplementing needle is used for supplementing and increasing the enthalpy of a double-cylinder compressor, on the one hand, the injection needle only provides a single channel for supplementing and increasing the enthalpy, and for a double-cylinder compressor with different upper and lower cylinder capacities, the unit time gas supplementing amount of the upper and lower cylinders cannot be correspondingly increased or decreased, and the gas injected into the two cylinders with different capacities cannot adapt to the capacity of the cylinders, so the more optimal effect of supplementing and increasing the enthalpy of the double-cylinder compressor with different upper and lower cylinder capacities cannot be achieved, and the effect of supplementing and increasing the enthalpy is poor. On the other hand, the temperature of the partition plate arranged between the upper and lower cylinders is high, and the exhaust temperature is high, and the existing gas supplementing device or gas supplementing structure cannot improve the above-mentioned problems. SUMMARY

[0006] The present application aims to provide an injection needle assembly, a gas supplementing structure and a compressor to solve the technical problem of poor effect of supplementing and increasing the enthalpy of a double-cylinder compressor with different upper and lower cylinder capacities by the existing single-channel gas supplementing device in the prior art. The preferred technical solutions in the technical solutions provided by the present application can produce the technical effects described below.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] The application provides an injection needle assembly, which comprises a needle body, wherein at least a first air supplement channel and a second air supplement channel are arranged in the needle body; when the needle body cooperates with a partition arranged between a first cylinder and a second cylinder,

[0009] The first air supplement channel is in communication with the first cylinder to guide the air supplemented by the needle body to at least partially enter the first cylinder; and the second air supplement channel is in communication with the second cylinder to guide the air supplemented by the needle body to at least partially enter the second cylinder.

[0010] Preferably, an air inlet cavity is arranged in the needle body, and air inlet ends of the first air supplement channel and the second air supplement channel are in communication with the air inlet cavity.

[0011] Preferably, the first air supplement channel and the second air supplement channel are arranged on upper and lower sides of the air inlet cavity respectively.

[0012] Preferably, a diameter a1 of the first air supplement channel, a diameter a2 of the second air supplement channel, a diameter d1 of the first cylinder, a diameter d2 of the second cylinder and a diameter D of the air inlet cavity satisfy:

[0013] 0.5D≤a n ≤1.0D,

[0014] 0.04d n ≤a n ≤0.068d n , wherein n=1, 2.

[0015] Preferably, a first welding block and a second welding block are arranged in the air inlet cavity, the first air supplement channel is arranged on the first welding block and in communication with the air inlet cavity and an outer wall of the needle body, and the second air supplement channel is arranged on the second welding block and in communication with the air inlet cavity and the outer wall of the needle body.

[0016] Preferably, the first welding block and the second welding block are arranged on opposite sides of the air inlet cavity respectively.

[0017] Preferably, the air inlet cavity is arranged on a central axis of the needle body.

[0018] Preferably, the first air supplement channel and the second air supplement channel are arranged in alignment or staggered on the air inlet cavity.

[0019] The application further provides an air supplement structure, which comprises the partition and the above-mentioned injection needle assembly, wherein a first air supplement hole for connecting the first cylinder and the first air supplement channel and a second air supplement hole for connecting the second cylinder and the second air supplement channel are arranged on the partition.

[0020] Preferably, the diameter C1 of the first air supplement hole, the diameter C2 of the second air supplement hole, the diameter d1 of the first cylinder, the diameter d2 of the second cylinder and the diameter D of the air inlet cavity provided in the air supplement device satisfy:

[0021] 0.5D≤C n ≤1.0D,

[0022] 0.04d n ≤C n ≤0.068d n wherein n = 1, 2.

[0023] Preferably, the partition is a partition plate, and the partition plate is provided with a first buffer channel for connecting the first air supplement hole and the first air supplement channel and a second buffer channel for connecting the second air supplement hole and the second air supplement channel.

[0024] Preferably, the first buffer channel and the second buffer channel are arc-shaped channels.

[0025] Preferably, the diameters a of the corresponding air supplement channels, the widths b of the buffer channels and the diameters c of the air supplement holes are the same, wherein n = 1, 2. n n n

[0026] Preferably, the partition plate is further provided with a containing cavity, the needle body is arranged in the containing cavity and the front end of the needle body is in sealing abutment with the end wall of the containing cavity.

[0027] Preferably, the containing cavity is arranged along the axial direction of the partition plate, and the first buffer channel and the second buffer channel are arranged on the two side plate bodies of the containing cavity, respectively.

[0028] The application further provides a compressor comprising a first cylinder, a second cylinder and the above-mentioned air supplement structure.

[0029] Compared with the prior art, the application has the following beneficial effects:

[0030] 1. The injection needle assembly provided by the application comprises a first air supplement channel and a second air supplement channel in the needle body, and the two channels are adapted to the displacement and position of the first cylinder and the second cylinder, respectively. For example, air supplement channels with different diameters can be applied to cylinders with different displacements in the compressor, so that the injection needle assembly can supplement air through the first air supplement channel or the second air supplement channel when cooperating with the partition, improve the air supplement enthalpy effect of different cylinders and improve the energy efficiency of the compressor. The above-mentioned injection needle assembly has wider applicability.

[0031] ​​​2、The air supplementing structure provided by the application, the injection needle assembly is matched with the first air supplementing hole and the second air supplementing hole on the partition, part of the supplemented air can be mixed with the air in the first cylinder through the first air supplementing channel from the first air supplementing hole, and another part of the supplemented air can be mixed with the air in the second cylinder through the second air supplementing channel from the second air supplementing hole, the corresponding air supplementing amount can be adjusted according to different displacements of the cylinder, compared with a single channel, the air supplementing enthalpy increasing effect of different cylinders can be improved, and the energy efficiency of the compressor can be improved.

[0032] 3、The compressor provided by the application, especially the double-cylinder compressor, can also improve the air supplementing enthalpy increasing effect of different cylinders and improve the energy efficiency of the compressor due to the air supplementing structure. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0034] Figure 1 is a structure diagram of the air supplementing injection needle in the prior art;

[0035] Figure 2 is a structure diagram of the injection needle assembly of the application;

[0036] Figure 3 is a diagram of the air supplementing structure;

[0037] Figure 4 is a structure diagram of the partition;

[0038] Figure 5 is a diagram of the local cooperation between the injection needle assembly and the partition;

[0039] Figure 6 is a radial sectional view of the air supplementing structure;

[0040] Figure 7 is a diagram of the double-cylinder compressor and the air supplementing structure thereof.

[0041] In the drawings: 101, communication hole; 20, existing air supplementing channel;

[0042] 1, air inlet cavity; 2, first air supplementing channel; 3, first welding block; 4, second air supplementing channel; 5, second welding block;

[0043] 10, partition; 11, first air supplementing hole; 12, second air supplementing hole; 13, first buffer channel; 14, second buffer channel; 15, accommodating cavity;

[0044] 30, double cylinder compressor; 31, first cylinder; 32, second cylinder; 33, liquid accumulator. DETAILED DESCRIPTION

[0045] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0046] In the description of the present application, it should be understood that the terms "center", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0047] Embodiment 1

[0048] Reference Figure 2 and Figure 7 As shown in the drawings, the present application provides an injection needle assembly, comprising a needle body, at least a first gas supplementing channel 2 and a second gas supplementing channel 4 are arranged in the needle body;

[0049] When the needle body cooperates with the partition arranged between the first cylinder 31 and the second cylinder 32:

[0050] The first gas supplementing channel 2 is in communication with the first cylinder 31 to guide the gas supplemented by the needle body to at least partially enter the first cylinder 31; and the second gas supplementing channel 4 is in communication with the second cylinder 32 to guide the gas supplemented by the needle body to at least partially enter the second cylinder 32.

[0051] Wherein, the first gas supplementing channel 2 and the second gas supplementing channel 4 are respectively matched with the displacement and position of the first cylinder 31 and the second cylinder 32, for example, for a double-cylinder compressor with different displacements, the first gas supplementing channel 2 and the second gas supplementing channel 4 can be set to different diameters according to the displacements of the two cylinders, so that the gas supplementing amounts entering the two cylinders through the two gas supplementing channels are different, compared with the single-channel injection needle, the gas supplementing and enthalpy increasing effect of the double-cylinder compressor 30 with different cylinder displacements is better, and the energy efficiency of the compressor is improved.

[0052] It should be understood that the number of the above-mentioned gas supplementing channels is at least two.

[0053] Referring to Figure 1 As shown in the figure, the existing injection needle supplement gas is through a single existing gas supplement channel 20 from the front end of the needle body into the space between the needle body and the partition plate 10, and then into the gas cylinder through the communication hole 101. Since the diameter of the gas outlet hole at the front end of the needle body is the diameter of the existing gas supplement channel, when the gas supplement is stopped, the gas backflow phenomenon is more obvious, and more gas will flow back to the needle body through the communication hole on the partition plate 10, causing the power consumption of the compressor to increase.

[0054] In order to prevent the above-mentioned gas supplement backflow phenomenon, so that the gas entering the needle body can enter two gas supplement channels respectively, as an optional embodiment, referring to Figure 2 As shown in the figure, the needle body is provided with an air inlet cavity 1, and the air inlet ends of the first gas supplement channel 2 and the second gas supplement channel 4 are in communication with the air inlet cavity 1.

[0055] Referring to Figure 2 and Figure 7 As shown in the figure, the gas in the liquid reservoir 33 can be communicated with the needle body through the air inlet pipe, and the supplemented gas enters the air inlet cavity 1, and then is divided into two parts, one part enters the first gas supplement channel 2, and the other part enters the second gas supplement channel 4. According to the displacement of the two cylinders, the diameters of the two gas supplement channels are the same or different.

[0056] The gas in the above-mentioned air inlet cavity 1 is divided into two parts through the first gas supplement channel 2 and the second gas supplement channel 4, and the diameters of the first gas supplement channel 2 and the second gas supplement channel 4 are smaller than the diameter of the air inlet cavity 1, which can to some extent alleviate the backflow problem of gas supplement and reduce the power consumption of the compressor.

[0057] As an optional embodiment, referring to Figure 2 As shown in the figure, the first gas supplement channel 2 and the second gas supplement channel 4 are respectively located on the upper and lower sides of the air inlet cavity 1. The supplemented gas can enter the two cylinders of the double-cylinder compressor 30 from the upper and lower sides of the air inlet cavity 1 respectively.

[0058] Preferably, since the first gas supplement channel 2 and the second gas supplement channel 4 should be adapted to the two cylinders respectively, through research and test, when the following conditions are met, the gas supplement amount of cylinders with different displacements can achieve better results, referring to Figure 5 As shown in the figure, the diameter a1 of the first gas supplement channel 2, the diameter a2 of the second gas supplement channel 4, the diameter d1 of the first cylinder 31, the diameter d2 of the second cylinder 32 and the diameter D of the air inlet cavity 1 satisfy:

[0059] 0.5D≤a n ≤1.0D,

[0060] 0.04d n ≤a n ≤0.068d nwherein n = 1, 2.

[0061] That is, the diameters of the first and second air supplement channels 2 and 4 are smaller than the diameter of the air inlet cavity 1 and larger than half of the diameter of the air inlet cavity 1, and the relationship between the air supplement channels and the cylinder diameter satisfies: 0.04dl≤al≤0.068dl, 0.04d2≤a2≤0.068d2.

[0062] In order to facilitate the arrangement of the first and second air supplement channels 2 and 4, as an optional embodiment, referring to Figure 2 , the first and second air supplement channels 2 and 4 are arranged on the opposite sides of the air inlet cavity 1.

[0063] As an optional embodiment, the first and second air supplement channels 2 and 4 are arranged on the opposite sides of the air inlet cavity 1.

[0064] As an optional embodiment, in order to divide the gas into two air supplement channels, referring to Figure 2 , the air inlet cavity 1 is arranged on the central axis of the needle body.

[0065] As an optional embodiment, the first and second air supplement channels 2 and 4 are arranged in alignment or staggered on the air inlet cavity 1.

[0066] When the two cylinders in the compressor are arranged in alignment, the two air supplement channels are arranged in alignment on the air inlet cavity 1; when the two cylinders in the compressor are arranged in staggered, the two air supplement channels are arranged in staggered on the air inlet cavity 1.

[0067] Example 2

[0068] Referring to Figures 3-7 , this embodiment provides an air supplement structure, which comprises a partition and the above-mentioned injection needle assembly, the partition comprises a first end face matched with the first cylinder and a second end face matched with the second cylinder, the first end face and the second end face are arranged oppositely, and the two end faces are respectively provided with a first air supplement hole 11 for connecting the first cylinder 31 and the first air supplement channel 2 and a second air supplement hole 12 for connecting the second cylinder 32 and the second air supplement channel 4. The gas supplemented by the needle body can enter the first cylinder 31 through the first air supplement hole 11 on the partition 10 via the first air supplement channel 2 and enter the second cylinder 32 through the second air supplement hole 12 on the partition 10 via the second air supplement channel 4.

[0069] As a preferred embodiment, the diameter of the corresponding air supplement channel is the same as the diameter of the air supplement hole, so that the air supplement amount of the cylinders of different displacements can achieve better effects when the following conditions are met, referring to Figure 5 As shown in the figure, the diameter C1 of the first air supplement hole 11, the diameter C2 of the second air supplement hole 12, the diameter d1 of the first cylinder 31, the diameter d2 of the second cylinder 32 and the diameter D of the air inlet cavity 1 provided in the air supplement device satisfy:

[0070] 0.5D≤C n ≤1.0D

[0071] 0.04d n ≤C n ≤0.068d n , wherein n = 1, 2.

[0072] Example 3

[0073] Since the partition is located between the first cylinder 31 and the second cylinder 32, it is affected by the high-temperature and high-pressure gas in the cylinder, and the temperature of the partition is relatively high, and the exhaust temperature is relatively high.

[0074] In order to alleviate the above problems, referring to Figures 3-6 As shown in the figure, the partition provided in the embodiment is a partition plate 10, and the partition plate 10 is provided with a first buffer channel 13 for communicating the first air supplement hole 11 and the first air supplement channel 2, and a second buffer channel 14 for communicating the second air supplement hole 12 and the second air supplement channel 4.

[0075] The gas supplemented by the air supplement needle first enters the first buffer channel 13 on the partition plate 10 after passing through the first air supplement channel 2, and the supplemented medium-temperature gas is buffered in the partition plate 10, which reduces the temperature of the partition plate 10 to a certain extent, thereby indirectly reducing the exhaust temperature, and on the other hand, also reducing the noise of the compressor; The supplemented gas then enters the first cylinder 31 through the first air supplement hole 11 from the first buffer channel 13. The gas in the second air supplement channel 4 also enters the corresponding second buffer channel 14 and the second air supplement hole 12.

[0076] By correspondingly providing a buffer channel on the partition plate 10, the performance of the compressor can be improved in terms of reducing noise and reducing exhaust temperature.

[0077] A preferred scheme is that the first buffer channel 13 and the second buffer channel 14 are both arc-shaped channels. For example, Figure 3 , Figure 4 and Figure 5As shown, the above-mentioned buffer channels are inclined relative to the plane in which the partition plate 10 is located and are channels that communicate the corresponding air supplement channels and air supplement holes; the two buffer channels are arranged in an arc shape so as to prolong the flow path of the gas in the partition plate 10 in a limited space, which is more conducive to reducing noise and reducing the temperature of the partition plate 10.

[0078] Referring to Figure 5 As shown, the diameters a n of the corresponding air supplement channels n and the diameters c n of the air supplement holes are the same, where n = 1, 2.

[0079] In order to facilitate the fixation of the needle body, referring to Figure 6 As shown, the partition plate 10 is further provided with a containing cavity 15, the needle body is arranged in the containing cavity 15 and the front end of the needle body is sealingly abutted against the end wall of the containing cavity 15.

[0080] By arranging the containing cavity 15 in the partition plate 10, the outer wall of the needle body is sealingly abutted against the outer wall of the containing cavity 15, and at the same time, the front end of the needle body is sealingly abutted against the end wall of the containing cavity 15, so that the air supplement gas cannot flow out through the front end of the air inlet cavity 1, but can only be divided by the two air supplement channels. Of course, the front end of the air inlet cavity 1 can also not communicate with the front end wall of the needle body, and the air inlet cavity 1 is a cavity that is closed at the front end inside the needle body.

[0081] As an optional embodiment, the containing cavity is arranged along the axial direction of the partition plate 10 and the first buffer channel 13 and the second buffer channel 14 are arranged on the two side plate bodies of the containing cavity, respectively. The two buffer channels can reduce the temperature of the partition plate 10 on both sides of the partition plate 10 and improve the performance of the compressor.

[0082] Example 4

[0083] Referring to Figure 7 As shown, the direction of the arrow in the figure is the flow direction of the gas; the present embodiment provides a compressor, which comprises a first cylinder 31, a second cylinder 32 and the above-mentioned air supplement structure.

[0084] The compressor provided by the present application, in particular the double-cylinder compressor 30, can also improve the air supplement enthalpy increase effect of different cylinders and improve the energy efficiency of the compressor due to the provision of the above-mentioned air supplement structure.

[0085] Referring to Figure 7As shown, the gas in the liquid reservoir 33 can enter the intake cavity 1 of the needle body through the intake pipe, and part of the gas in the intake cavity 1 enters the first buffer channel 13 in the partition plate 10 through the first gas supplement channel 2, and then enters the first cylinder 31 through the first gas supplement hole 11 to mix with the gas in the first cylinder 31; similarly, another part of the gas in the intake cavity 1 enters the second buffer channel 14 in the partition plate 10 through the second gas supplement channel 4, and then enters the second cylinder 32 through the second gas supplement hole 12. The diameter and position of each gas supplement channel can be set according to the position of the cylinder, so that the upper and lower cylinders in the double-cylinder compressor 30 can improve the energy efficiency of gas supplement and enthalpy increase.

[0086] In the description of the present specification, specific features, structures or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0087] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An injection needle assembly, characterized in that, The needle body includes at least a first air supply channel and a second air supply channel; when the needle body mates with the partition located between the first cylinder and the second cylinder: The first gas replenishment channel is connected to the first cylinder to guide at least a portion of the gas replenished by the needle into the first cylinder; and the second gas replenishment channel is connected to the second cylinder to guide at least a portion of the gas replenished by the needle into the second cylinder. The needle body is provided with an air inlet chamber, and the air inlet ends of the first air replenishment channel and the second air replenishment channel are both connected to the air inlet chamber; The diameter a1 of the first air supply channel, the diameter a2 of the second air supply channel, the diameter d1 of the first cylinder, the diameter d2 of the second cylinder, and the diameter D of the air intake chamber satisfy the following: 0.5D≤a n ≤1.0D, 0.04d n ≤a n ≤0.068d n , where n=1, 2.

2. The injection needle assembly according to claim 1, characterized in that, The first air supply channel and the second air supply channel are located on the upper and lower sides of the air intake chamber, respectively.

3. The injection needle assembly according to claim 1 or 2, characterized in that, The air intake chamber is provided with a first welding block and a second welding block. The first air supply channel is opened on the first welding block and connects the air intake chamber and the outer wall of the needle body. The second air supply channel is opened on the second welding block and connects the air intake chamber and the outer wall of the needle body.

4. The injection needle assembly according to claim 3, characterized in that, The first welding block and the second welding block are respectively disposed on opposite sides of the air intake chamber.

5. The injection needle assembly according to claim 1, characterized in that, The air intake chamber is located on the central axis of the needle body.

6. The injection needle assembly according to claim 1, characterized in that, The first air supply channel and the second air supply channel are arranged either directly opposite each other or staggered on the air intake chamber.

7. A gas-replenishing structure, characterized in that, The assembly includes the partition and the injection needle assembly according to any one of claims 1-6. The partition is provided with a first air inlet for connecting the first cylinder and the first air inlet channel and a second air inlet for connecting the second cylinder and the second air inlet channel.

8. The gas-replenishing structure according to claim 7, characterized in that, The diameter C1 of the first air inlet, the diameter C2 of the second air inlet, the diameter d1 of the first cylinder, the diameter d2 of the second cylinder, and the diameter D of the air intake chamber provided in the air inlet structure satisfy the following: 0.5D≤C n ≤1.0D, 0.04d n ≤C n ≤0.068d n , where n=1, 2.

9. The gas-replenishing structure according to claim 7, characterized in that, The partition is a baffle plate, and the baffle plate is provided with a first buffer channel for connecting the first air supply hole and the first air supply channel, and a second buffer channel for connecting the second air supply hole and the second air supply channel.

10. The gas-replenishing structure according to claim 9, characterized in that, Both the first buffer channel and the second buffer channel are arc-shaped channels.

11. The gas-replenishing structure according to claim 9, characterized in that, The corresponding diameter a of the air supply channel n , width of the buffer channel b n And the diameter c of the air inlet n All are the same, where n=1, 2.

12. The gas-replenishing structure according to claim 9, characterized in that, The partition is also provided with a receiving cavity, and the needle body is disposed in the receiving cavity with the front end of the needle body sealingly abutting against the end wall of the receiving cavity.

13. The gas-replenishing structure according to claim 12, characterized in that, The receiving cavity is arranged along the axial direction of the partition, and the first buffer channel and the second buffer channel are respectively arranged on the two side plates of the receiving cavity.

14. A compressor, characterized in that, It includes a first cylinder, a second cylinder, and the air supply structure as described in any one of claims 7-13.

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