CN216894805U

CN216894805U - Buffer seat, compressor and refrigeration plant

Info

Publication number: CN216894805U
Application number: CN202220343317.5U
Authority: CN
Inventors: 汪坤; 马涛; 晏子涵; 张洋洋; 黄刚
Original assignee: Anhui Meizhi Compressor Co Ltd
Current assignee: Anhui Meizhi Compressor Co Ltd
Priority date: 2022-02-18
Filing date: 2022-02-18
Publication date: 2022-07-05
Anticipated expiration: 2032-02-18

Abstract

The utility model provides a buffer seat, a compressor and refrigeration equipment. The seat body is provided with a buffer cavity with an opening at one side; and the cover body covers the opening of the buffer cavity and is detachably fixed on the seat body. In this scheme, the cushion socket is when normal use, and the lid cap seals in the open end of cushion chamber for the cushion chamber is in encapsulated situation. At the moment, the buffer cavity is communicated to the air suction flow channel corresponding to the compression cylinder so as to reduce the airflow pulsation in the corresponding air suction flow channel and improve the compression performance of the compression cylinder. When the cushion chamber is overhauled and maintained in need, dismantle the lid from the pedestal, alright audio-visual inside condition of looking over the cushion chamber to, the operating personnel of being convenient for overhauls and looks over, in order to get rid of the abnormal conditions.

Description

Buffer seat, compressor and refrigeration plant

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a buffer seat, a compressor and refrigeration equipment.

Background

With the upgrade of the global carbon emission limit, the requirements of the refrigeration industry on energy conservation and emission reduction are continuously improved. The compressor is used as the most core part and energy consumption large part of the refrigerating system and needs to put higher requirements on the refrigerating performance and the energy efficiency level of the compressor

The performance level of the existing reciprocating compressor is also prone to be bottleneck as it has been developed for decades. The single-suction single-exhaust compression pump body mechanism is mature, but the requirement for greatly improving the performance of the compressor in the future is met, and innovative and breakthrough technical progress is still lacked. The double-suction compressor can effectively improve the energy efficiency of the refrigerating system and reduce the power consumption, but the basic structure of the double-suction compressor causes larger airflow pulsation of the second suction flow channel, thereby influencing the overall energy efficiency of the compressor.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a buffer seat, a compressor and refrigeration equipment, and aims to solve the technical problem that a buffer cavity of a double-suction compressor is inconvenient to clean and maintain.

To achieve the above object, the present invention provides a cushion socket for a compression cylinder, the cushion socket comprising:

the base body is provided with a buffer cavity with an opening at one side; and the number of the first and second groups,

the cover body is arranged on the opening of the buffer cavity and detachably fixed on the seat body.

Optionally, one of the cover body and the seat body is provided with a screw joint piece, and the other is provided with a fitting piece, and the screw joint piece is matched with the fitting piece, so that the cover body can be detachably fastened on the seat body.

Optionally, a through hole penetrates through the cover body in a direction close to the seat body, and the screw connector comprises a fastening screw penetrating through the through hole;

the fitting piece comprises a threaded hole formed in the bottom wall of the buffer cavity, and the fastening screw is in threaded connection with the threaded hole, so that the cover body is fastened on the seat body.

Optionally, a sealing member is disposed between the cover body and the opening end of the buffer cavity.

Optionally, a counterbore is arranged at the open end of the buffer cavity, and the sealing element is arranged in the counterbore; and/or the presence of a gas in the gas,

the seal comprises a sealing gasket.

Optionally, the cover comprises:

a main body portion; and the number of the first and second groups,

the extension part extends from the periphery of the main body part to the same side to form an expansion cavity with one side opened by enclosing with the main body part, and one end of the extension part, which is far away from the main body part, is connected with the opening end of the buffer cavity, so that the expansion cavity is communicated with the buffer cavity.

Optionally, the cover body is provided with an air inlet communicated with the buffer cavity, and the air inlet is used for communicating with the air suction inner pipe.

Optionally, the buffer chamber is cylindrical, hemispherical or conical in shape.

In addition, the present invention also provides a compressor comprising:

the cylinder body comprises a working cavity arranged in the cylinder body, a first air suction hole is formed in the bottom of the working cavity, and a second air suction hole is formed in the side wall of the working cavity;

the piston assembly comprises a piston movably arranged in the working cavity, and the piston is provided with a first dead point positioned at the bottom of the working cavity and a second dead point far away from the bottom of the working cavity in a movable stroke; and the number of the first and second groups,

the buffer seat as claimed in any one of the above claims, wherein the buffer cavity is communicated with the second air suction hole and is communicated with an air suction inner tube, and the air suction inner tube is communicated with a second air suction outer tube.

Optionally, the displacement of the compressor is V0, the volume of the buffer cavity is V1, and V1/V0 is less than or equal to 10.

Optionally, a distance between the second air suction hole and the first dead center is L, and a distance between the first dead center and the second dead center is S, wherein 0.5S < L.

Furthermore, the present invention provides a refrigeration apparatus characterized by comprising the compressor as set forth in any one of the above.

Optionally, the refrigeration device is a refrigerator.

In the utility model, when the buffer seat is normally used, the cover body covers and seals the opening end of the buffer cavity, so that the buffer cavity is in a sealed state. At the moment, the buffer cavity is communicated to the air suction flow channel corresponding to the compression cylinder so as to reduce the airflow pulsation in the corresponding air suction flow channel and improve the compression performance of the compression cylinder. Need right when the cushion chamber overhauls and maintains, will the lid is followed dismantle on the pedestal, alright audio-visual looking over the inside condition of cushion chamber to, the operating personnel of being convenient for overhauls and looks over to get rid of the abnormal conditions.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of an internal structure of an embodiment of a compressor according to the present invention;

FIG. 2 is an exploded view of the buffer retainer of FIG. 1;

FIG. 3 is a schematic structural diagram of the cover in FIG. 2;

FIG. 4 is a schematic perspective view of the cylinder and the cushion seat in FIG. 1;

FIG. 5 is a schematic cross-sectional view of the cylinder and the cushion seat of FIG. 4;

fig. 6 is a partially sectional schematic view of the compressor of fig. 1.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The double-suction compressor comprises a first suction flow channel with lower airflow pressure and a second suction flow channel with higher airflow pressure, the energy efficiency of a refrigeration system can be effectively improved, and the power consumption is reduced, but the basic structure of the double-suction compressor causes that the airflow pulsation of the second suction flow channel is larger, and the overall energy efficiency of the compressor is influenced.

It should be noted that the gas flow pulsation, i.e. the gas flow pressure pulsation, causes the vibration problem of the compressor pipeline, and the reason is that the intermittent suction and discharge of the reciprocating compressor cylinder causes the periodic variation of the gas flow rate and pressure in the pipeline. The large air pressure pulsation can cause adverse effect on the operation of the compressor, destroy the tightness of the safety valve and cause large vibration of the pipeline and equipment, especially when the air flow passes through a pipeline elbow, a valve and the like, the large pressure unevenness becomes the main excitation force of the pipeline vibration, and the vibration stress generated at each joint of the pipeline can become the main cause of fatigue destruction of the whole structure.

Set up the cushion chamber in the second runner of breathing in and can effectively alleviate the air current pulsation, however, when setting up the cushion chamber, generally inconvenient looking over the inside condition of cushion chamber, the operating personnel of being not convenient for overhauls the cushion chamber and looks over.

In view of this, the utility model provides a buffer seat, a compressor and a refrigeration device, and aims to solve the technical problem that a buffer cavity of a double-suction compressor is inconvenient to clean and overhaul. Fig. 1 to 6 show an embodiment of a compressor according to the present invention.

Referring to fig. 1 to 3, the cushion base 3 provided by the present invention is used for a compression cylinder, and the cushion base 3 includes a base 31 and a cover 32. The seat body 31 is provided with a buffer cavity 3a with an opening at one side; and, the cover 32 covers the opening of the buffer chamber 3a and is detachably fixed to the seat body 31.

In this scheme, when the buffer seat 3 is in normal use, the cover 32 covers and seals the opening end of the buffer cavity 3a, so that the buffer cavity 3a is in a sealed state. At this time, the buffer chamber 3a is communicated to the corresponding air suction flow passage of the compression cylinder, so that the air flow pulsation in the corresponding air suction flow passage is reduced, and the compression performance of the compression cylinder is improved. Need right when buffer chamber 3a overhauls and maintains, will lid 32 is followed dismantle on the pedestal 31, alright audio-visual looking over buffer chamber 3 a's the inside condition to, the operating personnel of being convenient for overhauls and looks over to get rid of the abnormal conditions.

It should be noted that the shape of the buffer cavity 3a is not limited, and specifically, the shape of the buffer cavity 3a chamber is cylindrical, hemispherical or conical.

Further, the detachable implementation manner of the cover 32 and the seat 31 is not limited. One of the cover 32 and the base 31 may be provided with a magnet, and the other may be made of a magnetically attractable material, so that the cover 32 is detachably fixed to the base 31. Specifically, one of the cover 32 and the seat 31 is provided with a screw member, and the other is provided with a fitting member, and the screw member is fitted with the fitting member, so that the cover 32 is detachably fastened to the seat 31.

It should be noted that, in an embodiment, the screw connector includes an external thread disposed on the outer periphery of the cover 32, and the mating member includes an internal thread disposed on the side wall of the buffer cavity 3a, and the detachable connection between the cover 32 and the seat 31 is realized by the external thread disposed on the outer periphery of the cover 32 matching with the internal thread disposed on the side wall of the buffer cavity 3 a. In this embodiment, the cover 32 has a through hole 32c extending therethrough in a direction approaching the seat 31, the fastener includes a fastening screw 33 extending through the through hole 32c, the mating member includes a threaded hole 31a formed in the bottom wall of the buffer chamber 3a, and the fastening screw 33 mates with the threaded hole 31a, so that the cover 32 is fastened to the seat 31. Therefore, the cover body 32 and the base body 31 are detached and connected, and meanwhile, when the cover body 32 is connected with a pipeline, the cover body 32 is detached through the fastening screws 33 and the threaded holes 31a, so that the pipeline cannot be interfered, the structure is simple, and the cost is saved.

Specifically, the cover 32 is provided with an air inlet 32 communicated with the buffer cavity 3a, and the air inlet 32 is used for communicating with the air suction inner tube 4. That is, the air inlet hole 32 communicates the buffer cavity 3a and the air suction inner tube 4, and the air suction inner tube 4 is disposed on the cover body 32, so that the cover body 32 and the air suction inner tube 4 can be integrated, thereby facilitating the integration of parts and simplifying the assembly process.

Further, in order to improve the sealing performance between the cover 32 and the seat 31, the air flow in the buffer cavity 3a is prevented from overflowing from between the cover 32 and the seat 31. In this embodiment, a sealing member 34 is disposed between the cover 32 and the opening end of the buffer chamber 3a, and the sealing property between the cover 32 and the opening end of the buffer chamber 3a is ensured by the sealing member 34.

It can be understood that the arrangement form of the sealing element 34 is not limited, and may be a sealing sol, the sealing sol is applied to the connection position of the cover 32 and the seat 31, and the cover 32 and the seat 31 are sealed after the sealing sol is solidified; the sealing tape may be wound around the joint between the cover 32 and the base 31, or may be in other forms.

In this embodiment, the seal 34 is a sealing gasket. Specifically, in order to further improve the sealing performance between the cover 32 and the seat 31, a counter bore is further provided at the opening end of the buffer cavity 3a, and the sealing element 34 is provided in the counter bore. In this way, on the one hand, the cover body 32 is conveniently installed in alignment with the open end of the buffer chamber 3a, and on the other hand, the sealing performance of the buffer chamber 3a is improved.

Further, referring to fig. 3 to 5, the cover 32 includes a main body 321 and an extending portion 322. The extension portion 322 extends from the periphery of the main body portion 321 to the same side to form an extension cavity 32b with one side open by enclosing with the main body portion 321, and one end of the extension portion 322 far away from the main body portion 321 is connected to the open end of the buffer cavity 3a, so that the extension cavity 32b is communicated with the buffer cavity 3 a. It will be appreciated that the volume of the buffer chamber 3a is proportional to its effect on mitigating the pulsation of the air flow. That is, the larger the volume of the buffer chamber 3a is, the stronger the effect of reducing the pulsation of the air flow is; the smaller the volume of the buffer chamber 3a is, the weaker the effect of reducing the pulsation of the air flow is. In the scheme, the expansion cavity 32b is formed on the cover body 32, and the expansion cavity 32b is communicated with the buffer cavity 3a to play a role of expanding the buffer volume, so that the effect of reducing airflow pulsation of the compression cylinder can be further improved, and the scheme has the advantages of simple structure, cost saving and convenience in implementation.

In addition, referring to fig. 6, the present invention further provides a compressor 100, which includes a cylinder 1, a piston assembly 2, and a cushion base 3 as described above: the cylinder body 1 comprises a working cavity 1a arranged in the cylinder body, a first air suction hole 1b is formed in the bottom of the working cavity 1a, and a second air suction hole 1c is formed in the side wall of the working cavity; the piston assembly 2 comprises a piston 21 movably arranged in the working cavity 1a, and the piston 21 is provided with a first dead center positioned at the bottom of the working cavity 1a and a second dead center far away from the bottom of the working cavity 1a in a movable stroke; the buffer cavity 3a is communicated with the second air suction hole 1c and is communicated with an air suction inner tube 4, and the air suction inner tube 4 is used for being communicated with a second air suction outer tube 8.

It should be noted that, the detailed structure of the buffer seat 3 of the compressor 100 can refer to the above embodiment of the buffer seat 3, and is not described herein again; since the compressor 100 of the present invention uses the buffer seat 3, the embodiment of the compressor 100 of the present invention includes all technical solutions of all embodiments of the buffer seat 3, and the achieved technical effects are also completely the same, and are not repeated herein.

Taking the compressor 100 as an example for a refrigeration system of a refrigerator to explain, in a refrigeration process of the refrigerator, high-temperature and high-pressure refrigerant gas is conveyed from the compressor 100 to evaporators of a corresponding freezing chamber and a corresponding refrigerating chamber to evaporate and absorb heat, so as to realize refrigeration of the freezing chamber and the refrigerating chamber, but the temperatures set for the freezing chamber and the refrigerating chamber are not the same, and the evaporating temperatures of the freezing chamber and the refrigerating chamber are different, so that the temperatures and pressures of the refrigerants after heat exchange in the freezing chamber and the refrigerating chamber are different, and in the prior art, the compressor 100 realizes a refrigeration function of freezing and refrigerating through a flow path, so that the whole heat exchange system needs to participate in work when the freezing chamber or the refrigerating chamber needs to refrigerate, so that energy consumption is high, and energy efficiency is low.

In the technical scheme provided by the utility model, two parallel flow paths, namely a freezing condensation flow path and a refrigerating condensation flow path, are arranged, namely, the compressor 100 can reasonably distribute the high-temperature and high-pressure refrigerant formed by compression to the freezing flow path and the refrigerating flow path, so that the temperature and the pressure of the high-temperature and high-pressure refrigerant formed by compression by the compressor 100 are lower and lower when the high-temperature and high-pressure refrigerant returns to the compressor 100 after passing through the evaporator corresponding to the freezing chamber, and the temperature and the pressure of the high-temperature and high-pressure refrigerant formed by compression by the compressor 100 are higher and higher when the high-temperature and high-pressure refrigerant returns to the compressor 100 after passing through the evaporator corresponding to the refrigerating chamber. The working cavity 1a of the cylinder body 1 is simultaneously communicated with the first air suction hole 1b and the second air suction hole 1c so as to pass through a first air suction flow channel corresponding to the first air suction hole 1b and a second air suction flow channel corresponding to the second air suction hole 1c, so that a refrigerant with relatively low temperature and low pressure and a refrigerant with relatively high temperature and high pressure and a refrigerant with relatively low temperature and high pressure and a refrigerant with relatively high temperature and high pressure and a refrigerant with relatively low pressure and refrigerant gas with relatively high pressure and refrigerant gas with relatively low pressure and refrigerant gas with relatively high pressure can be supplied into the working cavity 1a through the second air suction hole 1c when the refrigerant gas with the first air suction hole 1b is compressed by the cylinder body 1, thereby the suction hole 1a suction amount of the working cavity 1a of the cylinder body 1 is increased, and compression efficiency of the compressor 100 is improved, and respective working conditions are realized through the two parallel flow paths, so that the power consumption is reduced.

Specifically, a buffer structure is provided in the present scheme, wherein the buffer cavity 3a communicates with the air suction inner tube 4 and the second air suction hole 1c, and the air suction inner tube 4 communicates with the second air suction outer tube 8. In this way, the refrigerant in the second outer suction pipe 8 enters the buffer cavity 3a after flowing through the inner suction pipe 4, and enters the working cavity 1a from the second suction hole 1c communicated with the buffer cavity 3 a. Therefore, the volume of the buffer cavity 3a plays a role in energy storage, airflow pulsation in the second air suction flow channel is reduced, and the overall performance of the compression cylinder is improved.

In an embodiment, the piston assembly 2 further includes a crankshaft 22 and a connecting rod 23, the crankshaft 22 is in transmission connection with one end of the connecting rod 23, and one end of the connecting rod 23 away from the crankshaft 22 is in transmission connection with the piston 21. Therefore, the crankshaft 22 is driven by the motor to drive the connecting rod 23 to move, and further drive the piston 21 to reciprocate in the working chamber 1a, so as to complete the actions of sucking air flow and compressing air flow.

Because the opening and closing of each suction hole is often controlled by a control valve group in the conventional compressor 100, when the compressor 100 has only one suction hole, one control valve group is arranged; when the compressor 100 has a plurality of suction holes, a plurality of control valve sets are generally disposed correspondingly, so that the control is complicated. Therefore, in an embodiment of the present invention, the distance between the second air intake hole 1c and the first dead center is L, and the distance between the first dead center and the second dead center is S, wherein 0.5S < L. During the movement of the piston 21, the first and second intake holes 1b and 1c are opened and closed as follows:

the suction stroke of compressor 100 includes:

a first stroke: the piston 21 moves from the first dead center to the second dead center, and the distance from the first dead center is less than 0.5S. In the first stroke, the control valve group is opened, so that the first air suction hole 1b is opened, and the second air suction hole 1c is blocked by the piston 21. At this time, the working chamber 1a of the cylinder 1 performs suction only through the first suction holes 1 b. At this time, the total amount of the refrigerant in the working chamber 1a is from the first suction port 1b, i.e., the refrigerant of the first condensation circuit. It can be understood that, when the piston 21 moves to a position close to the second dead point, the compression space of the working chamber 1a of the cylinder 1 increases, and is in a negative pressure state, so that the external air flow can enter the working chamber 1a of the cylinder 1 from the first air suction hole 1 b. And the pressure of the air flow passing through the first air suction holes 1b is lower than that of the air flow passing through the second air suction holes 1 c. Therefore, in this moving stroke, the second suction hole 1c is blocked by the piston 21 to prevent the air flow of the second suction hole 1c from obstructing the air flow of the first suction hole 1b from entering the working chamber 1a of the cylinder 1.

A second stroke: the piston 21 moves from the first dead center to the second dead center, and the distance from the first dead center is more than 0.5S. In the second stroke, the piston 21 does not block the second suction hole 1c, so that the second suction hole 1c communicates with the working chamber 1a of the cylinder 1. At the moment, the control valve group is switched between an opening state and a closing state according to actual requirements. When the control valve group is in an open state, the first air suction hole 1b and the second air suction hole 1c simultaneously input airflow to a working cavity of the cylinder body. Since a certain amount of air flow is sucked in the space of the working chamber 1a of the cylinder 1 through the first air suction holes 1b in the first stroke, a certain air flow pressure is provided in the compression space. Therefore, when an airflow is input to the working chamber 1a of the cylinder 1 through the second air intake hole 1c, the airflow has a small influence on the first air intake hole 1 b. And the distance from the second air suction hole 1c to the first dead point is greater than 0.5S, namely the distance from the second air suction hole 1c to the first air suction hole 1b is greater than 0.5S, so that a proper buffer distance exists between the second air suction hole 1c and the first air suction hole 1b, the blocking influence of the air flow of the second air suction hole 1c on the air flow of the first air suction hole 1b is reduced, and the compression energy efficiency is improved. When the control valve group is in a closed state, the second suction hole 1c inputs airflow to the working cavity 1a of the cylinder body 1. At this time, the refrigerant supplemented into the working chamber 1a comes only from the second suction hole 1c, that is, the refrigerant of the second condensation circuit flows back into the working chamber 1a of the cylinder 1. It can be understood that, the closer the second suction hole 1c is to the midpoint between the first dead point and the second dead point, the earlier the opening time of the second suction hole 1c is, and the later the closing time is, the longer the high-pressure refrigerant provided by the second condensation loop is, and the greater the air supplement amount is; when the second air suction hole 1c is closer to the second dead point, the opening time of the second air suction hole 1c is late, the closing time is early, the high-pressure refrigerant provided by the second condensation loop is short, the air supplementing time is short, and therefore the air supplementing amount is small. In reality, the position of the second air suction hole 1c can be set according to the requirement of air supplement amount.

The compression stroke of the compressor 100 includes:

a third stroke: the piston 21 moves from the second dead center to a direction close to the first dead center, and is more than 0.5S away from the first dead center. In the third stroke, the control valve group is closed, and the piston 21 moves rapidly in the direction close to the first dead center. At this time, the second suction hole 1c still inputs the air flow to the working chamber 1a of the cylinder 1. At this time, the refrigerant supplied into the working chamber 1a comes from the second suction port 1 c. Therefore, in the third stroke, when the air flow in the working chamber 1a of the cylinder 1 is compressed, the air flow input into the working chamber 1a of the cylinder 1 through the second air suction hole 1c is not excessively blocked, so that the air flow can still be sucked in the cylinder 1 in the compression stroke. Further, since the air flows from the first air suction holes 1b and the second air suction holes 1c are mixed in the working chamber 1a of the cylinder 1, the pressure of the air flow in the working chamber 1a of the cylinder 1 is made smaller than the pressure of the air flow passing through the second air suction holes 1 c.

And a fourth stroke: the piston 21 moves from the second dead center to a direction close to the first dead center, and the distance from the second dead center to the first dead center is less than 0.5S. In the fourth stroke, the valve group is still closed and the piston 21 blocks the second suction hole 1 c. In this process, the piston 21 compresses the gas flow in the working chamber 1a of the cylinder 1 into a high-pressure gas flow. And when the piston 21 moves to the second dead point, the air flow pressure in the working cavity 1a of the cylinder 1 is compressed to the right position. At this time, a control valve group of an output pipeline communicating with the working chamber 1a of the cylinder 1 is switched from a closed state to an open state to output a compressed high-pressure air flow.

The working circuits corresponding to the two condensation flow paths are as follows:

the flow paths of the airflow in the first airflow suction channel are as follows: the first condensation flow path → the first suction hole 1b → the working chamber 1a of the cylinder 1.

The airflow flow path in the second air suction flow channel is as follows: the second condensation flow path → the second suction hole 1c → the working chamber 1a of the cylinder 1.

And the compressor 100 further comprises an inner exhaust pipe 5 communicated with the working cavity 1a of the cylinder body 1, wherein the inner exhaust pipe 5 is communicated with an outer exhaust pipe 9, so that high-pressure airflow compressed in the working cavity 1a of the cylinder body 1 is exhausted from the inner exhaust pipe 5 to the outer exhaust pipe 9.

In a concrete reality, the first condensing flow path corresponds to a freezer compartment of a refrigerator, the required refrigerant amount is large due to a large refrigerating amount required by the freezer compartment, the pressure of the consumed refrigerant is large in a working process, the second condensing flow path corresponds to a refrigerating compartment of the refrigerator, the pressure of the consumed refrigerant is small due to a small refrigerating amount required by the refrigerating compartment, so that the pressure of the refrigerant flowing back to the first air suction hole 1b is far smaller than the pressure of the second air suction hole 1c, but the refrigerant amount of the first condensing flow path is large, so that when the compressor 100 works, the piston 21 mainly opens the first air suction hole 1b in an air suction stroke in the first half of air suction to perform main air suction to suck a large refrigerant amount on the corresponding condensing flow path, and in an air suction stroke in the second half of air suction stroke, the second air suction hole 1c is communicated with the working chamber 1a, the first air suction hole 1b is closed, the second air suction hole 1c starts to be filled with high-pressure refrigerant gas, air is continuously supplied in the first small half stroke of the compression stage, finally in the second large half stroke of the compression stage, the second air suction hole 1c is closed, the piston 21 compresses the refrigerant in the working cavity 1a, and the air inflow of the second air suction hole 1c can be controlled by setting the distance between the second air suction hole 1c and the first dead point and the second dead point, namely, the opening and closing time of the second air suction hole 1c can be adjusted when the piston 21 reciprocates due to the position setting of the second air suction hole 1c, so that the flow ratio of the first air suction hole 1b to the second air suction hole 1c can be adjusted. In addition, the second air suction hole 1c is arranged on the side wall of the cylinder body 1 and is arranged close to a second dead point, so that the compressor 100 can automatically open and close the second air suction hole 1c in the moving stroke of the piston 21 without specially arranging a control valve group to control the opening and closing of the second air suction hole 1c, the structural design is ingenious, and the cost is also saved.

It should be noted that, a distance between the first dead point and the second dead point is S, that is, the first dead point refers to a position where one end of the piston 21 close to the bottom of the working chamber 1a is located when the end surface of one end of the piston 21 close to the bottom of the working chamber 1 moves to a nearest distance close to the bottom of the cylinder 1, and the second dead point refers to a position where one end of the piston 21 close to the bottom of the cylinder 1 is located when the end surface of one end of the piston 21 close to the bottom of the cylinder 1 moves to a farthest distance away from the bottom of the working chamber 1 a. That is, the distance S is a distance between the two extreme states of the end surface of the piston 21 near the end of the bottom wall of the cylinder 1. A distance between the second air intake hole 1c and the first dead point is L, that is, a distance between a center line of the second air intake hole 1c and the first dead point is L.

In addition, in the present embodiment, the compressor 100 includes a casing 6, a first suction outer tube 7 and a second suction outer tube 8, and the first suction outer tube 7 and the second suction outer tube 8 are disposed outside the casing 6 and communicate with an inner cavity of the casing 6. The compression cylinder is arranged in an inner cavity of the housing 6, wherein the air suction inner tube 4 is connected to one end of the second air suction outer tube 8 arranged on the housing 6 to form a second air suction flow channel, and the first air suction outer tube 7 correspondingly forms a first air suction flow channel.

Thus, the flow paths of the airflow in the first airflow suction channel are as follows: the first condensation flow path → the first suction outer tube 7 → the inner chamber of the casing 6 → the first suction hole 1b → the working chamber 1 a.

The airflow flow path in the second air suction flow channel is as follows: the second condensation flow path → the second suction outer tube 8 → the suction inner tube 4 → the buffer chamber 3a → the second suction hole 1c → the working chamber 1 a.

And the compression cylinder also comprises an inner exhaust pipe 5 communicated with the working cavity 1a, wherein the inner exhaust pipe 5 is communicated with an outer exhaust pipe 9, so that high-pressure airflow compressed in the working cavity 1a is exhausted from the inner exhaust pipe 5 to the outer exhaust pipe 9.

Further, as mentioned above, the effect of the buffer cavity 3a to reduce the air pulsation is proportional to the volume of the buffer cavity 3a, however, when the volume of the buffer cavity 3a is too large, on one hand, the volume of the compressor 100 is increased, which is not favorable for improving the integration of the compressor 100, and on the other hand, the air flow in the second outer suction pipe 8 is slowed down to flow to the working cavity 1a through the inner suction pipe 4 and the buffer cavity 3 a. Therefore, in the present embodiment, the displacement of the compressor 100 is V0, the volume of the buffer chamber 3a is V1, and V1/V0 is less than or equal to 10. In this way, while the buffer chamber 3a has a good effect of reducing the pulsation of the air flow, the integration level of the compression is improved, and the volume of the compressor 100 is reduced.

It should be noted that the displacement of the compressor 100 refers to the volume of gas discharged by one reciprocating motion of the piston 21.

In addition, in order to achieve the above object, the present invention further provides a refrigeration apparatus, which includes the compressor 100 according to the above technical solution. It should be noted that, for the detailed structure of the compressor 100 of the refrigeration equipment, reference may be made to the above-mentioned embodiment of the compressor 100, and details are not described here; since the compressor 100 is used in the refrigeration apparatus of the present invention, the embodiment of the refrigeration apparatus of the present invention includes all technical solutions of all embodiments of the compressor 100, and the achieved technical effects are also completely the same, and are not described herein again.

It should be noted that the specific form of the refrigeration equipment is not limited, and the refrigeration equipment may be an air conditioner, a fresh air blower, or other equipment. Specifically, in this embodiment, the refrigeration apparatus is a refrigerator.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A cushion seat for a compression cylinder, the cushion seat comprising:

2. The cushion socket of claim 1, wherein one of the cover and the socket body is provided with a screw member, and the other is provided with a fitting member, the screw member and the fitting member being engaged so that the cover is detachably fastened to the socket body.

3. The cushion seat according to claim 2, wherein the cover body is provided with a through hole extending in a direction close to the seat body, and the screw member comprises a fastening screw passing through the through hole;

4. The cushion pan of claim 3, wherein a seal is provided between the cover and the open end of the cushion chamber.

5. The cushion socket according to claim 4, wherein the open end of the cushion chamber is provided with a counterbore, and the seal member is provided in the counterbore; and/or the presence of a gas in the gas,

the seal comprises a sealing gasket.

6. The cushion pan of claim 1, wherein the cover includes:

a main body portion; and the number of the first and second groups,

7. The cushion socket according to claim 1, wherein the cover body is provided with an air inlet hole communicated with the cushion chamber, and the air inlet hole is used for communicating with an air suction inner pipe.

8. The cushion socket of claim 1, wherein the cushion chamber is cylindrical, hemispherical or conical in shape.

9. A compressor, characterized by comprising a cushion socket according to any one of claims 1 to 8.

10. A refrigeration apparatus, characterized by comprising a compressor according to claim 9.