CN216342676U - Compressor and compression cycle system - Google Patents

Abstract

The utility model provides a compressor and a compression cycle system, the compressor includes: the piston reciprocates in the inner cavity, an annular groove is formed between the first cylinder body and the second cylinder body, and a porous bearing sleeve is arranged in the annular groove and is part of the side wall of the inner cavity; the first cylinder body is provided with a through hole to form a fluid infusion port, and the porous bearing sleeve is communicated with one end of the fluid infusion port. According to the compressor provided by the utility model, the liquid supplementing port is formed in the first cylinder body, the porous bearing sleeve is arranged between the first cylinder body and the second cylinder body, the liquid supplementing port is communicated with the inner cavity through the porous bearing sleeve, and the liquid inlet position entering from the porous bearing sleeve is determined according to the positions and the pressure difference of the piston and the porous bearing sleeve, so that the effects of lubricating, supplementing liquid, sealing and cooling the compressor by the liquid entering from the liquid supplementing port are realized, the temperature in the compression cavity is reduced, and the oil-free operation of the compressor is realized.

Description

Compressor and compression cycle system

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a compressor and a compression circulation system.

Background

In the technical field of refrigeration, piston compressors are widely applied due to compact structure, good sealing performance and high volume efficiency, in particular to small refrigeration devices with multiple temperature zones; the traditional refrigeration piston compressor structure adopts lubricating oil to realize lubrication, clearance sealing and cooling in the compression process between the cylinder and the piston, so that the traditional refrigeration piston compressor cannot be used under the condition of low temperature or high temperature.

The existing compressor capable of realizing air supplement needs to add a heat exchanger before an air supplement port, liquid refrigerant is converted into gas state to enter the compressor for air supplement and pressurization, and the liquid refrigerant cannot be directly supplemented into the compressor.

SUMMERY OF THE UTILITY MODEL

The utility model provides a compressor and a compression circulation system, which are used for solving the defect that a liquid refrigerant cannot be directly supplemented into a compression cavity in the prior art.

The present invention provides a compressor, comprising: the cylinder comprises a first cylinder body, a second cylinder body and a piston, wherein the first cylinder body and the second cylinder body are sleeved to form an inner cavity, the piston reciprocates in the inner cavity,

an annular groove is formed between the first cylinder body and the second cylinder body, a porous bearing sleeve is installed in the annular groove, and the porous bearing sleeve is a part of the side wall of the inner cavity; the first cylinder body is provided with a through hole to form a fluid infusion port, and the porous bearing sleeve is communicated with one end of the fluid infusion port.

According to the compressor provided by the utility model, the first cylinder body is provided with the annular liquid inlet passage which is annularly communicated with the annular groove,

the liquid supplementing port is communicated with the porous bearing sleeve through the annular liquid inlet channel.

The compressor provided by the utility model comprises a suction valve arranged at the front end of the piston and a discharge mechanism arranged at the front end of the second cylinder.

The compressor provided by the utility model comprises a driving mechanism and a shell, wherein the driving mechanism drives the piston to reciprocate in the inner cavity through a coupler, and the compressor is arranged in the shell.

The compressor provided by the utility model comprises a pair of compressors, the pair of compressors are driven by a pair of driving mechanisms, the pair of compressors are arranged in the same shell,

wherein the drive mechanisms of a pair of the compressors are arranged facing away from each other.

The utility model also provides a compression circulation system which comprises the first heat exchanger, the second heat exchanger and the compressor, wherein the first heat exchanger, the second heat exchanger and the compressor form a circulation loop with a liquid supplementing branch.

According to the compression cycle system provided by the utility model, the exhaust port of the compressor is connected with the first heat exchanger, the first heat exchanger comprises a first main path and a first branch path, the first main path is connected with the second heat exchanger, the first branch path is connected with the liquid supplementing port of the compressor,

the second heat exchanger is connected with a suction port of the compressor.

According to the compression cycle system provided by the utility model, the compression cycle system further comprises a first four-way valve and a first electromagnetic directional valve, wherein four interfaces of the first four-way valve are respectively connected with the exhaust port, the first heat exchanger, the suction port and the second heat exchanger, an inlet of the first electromagnetic directional valve is respectively connected with the first branch and the second heat exchanger, an outlet of the first electromagnetic directional valve is connected with the liquid supplementing port, valve ports of the first four-way valve and the first electromagnetic directional valve are switched to realize the switching between the refrigerating state and the heating state,

in the refrigeration state, the exhaust port is communicated with the first heat exchanger, the suction port is communicated with the second heat exchanger, and the first branch is communicated with the liquid supplementing port; in the heating state, the exhaust port is communicated with the second heat exchanger, the air suction port is communicated with the first heat exchanger, and the primary branch of the second heat exchanger is communicated with the liquid supplementing port.

The compression cycle system provided by the utility model also comprises a second four-way valve and a third heat exchanger, wherein the third heat exchanger comprises a first heat exchange side and a second heat exchange side, four interfaces of the second four-way valve are respectively connected with an exhaust port and an air suction port of the compressor, the first heat exchanger and the second heat exchanger,

one end of the first heat exchange side is connected with the first heat exchanger, the other end of the first heat exchange side is connected with the primary main path of the second heat exchanger, one end of the second heat exchange side is connected with the secondary branch of the second heat exchanger, the other end of the second heat exchange side is connected with the liquid supplementing port, and the valve port of the second four-way valve is switched to realize the switching between the refrigerating state and the heating state.

The compression cycle system provided by the utility model also comprises a fourth heat exchanger, a second electromagnetic directional valve, a third electromagnetic directional valve and a fourth electromagnetic directional valve, wherein the outlet of the second heat exchanger is connected with the air suction port of the compressor, the inlet of the first heat exchanger is connected with the air exhaust port of the compressor,

the second electromagnetic directional valve is respectively connected with the outlet of the first heat exchanger, the inlet of the fourth heat exchanger and the fourth electromagnetic directional valve, the third electromagnetic directional valve is respectively connected with the outlet of the fourth heat exchanger, the inlet of the second heat exchanger and the fourth electromagnetic directional valve, and the fourth electromagnetic directional valve is connected with the liquid supplementing port.

According to the compressor provided by the utility model, the liquid supplementing port is formed in the first cylinder body, the porous bearing sleeve is arranged between the first cylinder body and the second cylinder body, so that the liquid supplementing port is communicated with the inner cavity through the porous bearing sleeve, the liquid entering position from the porous bearing sleeve is determined according to the positions of the piston and the porous bearing sleeve and the action of pressure difference, the effects of lubrication, liquid supplementing, sealing and cooling of the compressor by the liquid entering from the liquid supplementing port are realized, the friction and leakage of the compressor are reduced, the temperature in the compression cavity is reduced, the oil-free operation of the compressor is realized, and the energy consumption and the equipment volume are reduced.

Further, the compression cycle system provided by the present invention has various advantages as described above since it includes the compressor as described above.

Drawings

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

FIG. 1 is a schematic partial cross-sectional view of a compressor provided by the present invention;

FIG. 2 is a schematic view of a compressor according to the present invention;

FIG. 3 is a second schematic view of the compressor according to the present invention;

FIG. 4 is one of the schematic diagrams of the refrigeration cycle system provided by the present invention;

FIG. 5 is a second schematic view of a refrigeration cycle system provided by the present invention;

FIG. 6 is a third schematic view of a refrigeration cycle system provided by the present invention;

fig. 7 is a fourth schematic view of the refrigeration cycle system provided by the present invention.

Reference numerals:

100: a first cylinder; 110: a second cylinder; 120: a piston;

130: an inner cavity; 101: a porous bearing sleeve; 102: a fluid infusion port;

103: an annular liquid inlet channel; 140: an air intake valve; 150: an exhaust mechanism;

141: an air suction passage; 151: a mounting seat; 152: a back pressure chamber;

153: an exhaust valve; 154: a spring; 121: a first end face;

200: a drive mechanism; 201: a housing; 202: a coupling;

210: a compressor; 211: an exhaust port; 212: an air suction port;

300: a first heat exchanger; 301: a first main road; 302: a first branch;

310: a first four-way valve; 320: a second four-way valve; 400: a second heat exchanger;

410: a fourth heat exchanger; 500: a throttling element; 510: a first electromagnetic directional valve;

401: a secondary branch; 402: a primary main path; 530: a second electromagnetic directional valve;

520: a third heat exchanger; 540: a third electromagnetic directional valve; 550: and a fourth electromagnetic directional valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

An embodiment of the present invention will be described below with reference to fig. 1 to 7. It is to be understood that the following description is only exemplary embodiments of the present invention and is not intended to limit the present invention.

As shown in fig. 1, the present invention provides a compressor including: the cylinder comprises a first cylinder body 100, a second cylinder body 110 and a piston 120, wherein the first cylinder body 100 and the second cylinder body 110 are sleeved to form an inner cavity 130, and the piston 120 reciprocates in the inner cavity 130.

An annular groove is formed between the first cylinder 100 and the second cylinder 110, a porous bearing sleeve 101 is installed in the annular groove, and the porous bearing sleeve 101 is a part of the side wall of the inner cavity 130; the first cylinder 100 has a through hole forming a fluid infusion port 102, and the porous bearing sleeve 101 communicates with one end of the fluid infusion port 102.

In other words, the first and second cylinder blocks 100 and 110 are nested to form a cylinder, the interior of which is formed with an internal cavity 130. The first cylinder block 100, the porous bearing sleeve 101, and the second cylinder block 110 are sequentially fitted together to form an inner cavity 130.

As shown in fig. 1, in an embodiment of the present invention, the first cylinder 100 is provided with an annular liquid inlet passage 103, the annular liquid inlet passage 103 is in annular communication with the annular groove, and the liquid supplementing port 102 is in communication with the porous bearing housing 101 through the annular liquid inlet passage 103.

In other words, an annular liquid inlet passage 103 is formed between the porous bearing housing 101 and the first cylinder 100, and gas and/or liquid entering from the liquid supplementing port 102 is uniformly distributed on the porous bearing housing 101 through the annular liquid inlet passage 103 and enters the inner cavity.

Furthermore, the annular liquid inlet channel 103 has a taper, and the taper is transited from the liquid supplementing port 102 with a smaller diameter to the porous bearing sleeve 101 with a larger width, so that the liquid inlet pressure loss is reduced. The width of the surface of the annular liquid inlet passage 103 in contact with the porous bearing housing 101 is smaller than the width of the porous bearing housing 101. The first cylinder block 100 and the second cylinder block 110 are prevented from being unable to limit the position of the porous bearing bush 101 due to the excessively large force-bearing surface of the porous bearing bush 101.

In the porous bearing bush 101 of the present invention, the porous bearing bush 101 is a circular ring with a single diameter, and the porous bearing bush 101 is provided therein with an air passage with a pore diameter varying from 0.001 to 1000 μm. The porous bearing sleeve 101 can be a breathable porous foam structure processed by one or more of metal powder, metal wire mesh and non-metal powder; or a porous breathable ceramic structure or a porous breathable plastic structure processed from nonmetal powder such as carbon powder, graphite powder, alumina powder, silicon dioxide powder, engineering plastic powder and the like.

In the embodiment of the present invention, the compressor includes a suction valve 140 disposed at the front end of the piston and a discharge mechanism 150 disposed at the front end of the second cylinder 110. The surface of the exhaust mechanism 150 contacting the second cylinder 110 is the top dead center of the piston 120, the point with the largest distance from the top dead center during the retraction of the piston 120 is the bottom dead center, and the piston 120 reciprocates between the top dead center and the bottom dead center.

In addition, the piston 120 is provided with an air suction passage 141, and when the air suction valve 140 is opened, the air suction passage 141 communicates the air suction valve 140 with the cavity 130.

With continued reference to FIG. 1, in an alternative embodiment of the present invention, the venting mechanism 150 includes a mounting block 151, a back pressure chamber 152 formed within the mounting block 151, a vent valve 153 within the back pressure chamber 152, and a vent port 211. A spring 154 is provided between the exhaust valve 153 and the mounting seat 151. Wherein, the back pressure cavity 152 is communicated with the exhaust port 211, and the exhaust valve 153 is contacted with the end surface of the second cylinder 110 to form the top dead center of the piston 120.

For the motion process of the piston 120, the initial position of the piston 120 is placed at the top dead center, the first stage: the piston 120 and the exhaust mechanism 150 form a compression chamber in the process of moving the front end surface of the piston 120 from the top dead center to the first end surface 121, which is the end surface of the porous bearing housing 101 near the top dead center. The compression chamber is a part of the cavity of the inner chamber 130 between the piston 120 and the exhaust valve 153.

When the pressure of the compression chamber is lower than the pressure of the suction channel 141, the suction valve 140 is opened under the action of the pressure difference, so that low-pressure suction is realized. At this time, the refrigerant flowing out of the porous bearing sleeve 101 enters a gap formed between the piston 120 and the inner cavity side wall, and the refrigerant flowing out of the porous bearing sleeve 101 has a lubricating and cooling effect on the piston 120. Part of the refrigerant throttled by the gap formed by the piston 120 and the inner cavity side wall enters the compression cavity, and the other part enters the machine body part, namely the cavity on the piston rod side and the shell part communicated with the cavity.

And a second stage: when the front end surface of the piston 120 continues to move to the bottom dead center from the first end surface 121, the porous bearing sleeve 101 and the compression cavity start to communicate, a large amount of refrigerant enters the compression cavity, and the liquid supplementing port 102 realizes medium-pressure liquid supplementing.

Further, in this process, if the pressure in the compression chamber is higher than the pressure in the suction passage 141, the suction valve 140 is closed. If the medium-pressure fluid infusion amount of the fluid infusion port 102 is small, and the pressure in the compression cavity is slowly increased along with the fluid infusion port 102, so that the pressure in the compression cavity is still lower than the pressure of the suction channel 141, the suction valve 140 is still in an open state, and the fluid infusion port 102 and the suction channel 141 are simultaneously supplied with refrigerants.

And a third stage: when the piston 120 reaches the bottom dead center and moves from the bottom dead center to the top dead center, the suction valve 140 is closed, and the fluid infusion port 102 continues to achieve fluid infusion through the porous bearing sleeve 101 until the front end surface of the piston 120 reaches the first end surface 121 of the porous bearing sleeve 101 or the refrigerant pressure of the compression cavity is higher than the pressure in the fluid infusion port 102.

A fourth stage: when the chamber pressure reaches the discharge pressure while the front end surface of the piston 120 moves from the first end surface 121 toward the top dead center, the discharge valve 153 opens, and the high-pressure refrigerant is discharged to the discharge port 211, completing expansion, suction, compression, and discharge.

As shown in fig. 2, in an alternative embodiment of the present invention, the present invention comprises a driving mechanism 200 and a housing 201, the driving mechanism 200 drives the piston 120 to reciprocate in the inner cavity 130 through a coupling 202, and the compressor is disposed in the housing 201.

As shown in fig. 3, in another alternative embodiment of the present invention, a pair of compressors 210 is included, the pair of compressors 210 is driven by a pair of driving mechanisms 200, the pair of compressors 210 are disposed in the same housing 201, wherein the driving mechanisms 200 of the pair of compressors 210 are disposed opposite to each other. Also, the pair of compressors 210 share one discharge port and one suction port. The compressor adopts the arrangement mode that the driving mechanisms 200 are deviated from each other, so that the vibration of the body of the compressor 210 can be effectively reduced.

In summary, the piston 120 is driven by the driving mechanism 200 to reciprocate in the inner cavity, and the suction valve, the exhaust mechanism and the fluid infusion port are matched to realize the processes of suction, compression, infusion, discharge and expansion of the refrigerant in the compression cavity.

As shown in fig. 4 to 7, the present invention further provides a compression cycle system, which includes a first heat exchanger 300, a second heat exchanger 400, and the compressor 210, wherein the first heat exchanger 300, the second heat exchanger 400, and the compressor 210 form a circulation loop with a fluid supplementing branch.

As shown in fig. 4, in an embodiment of the present invention, the exhaust port 211 of the compressor 210 is connected to the first heat exchanger 300, the first heat exchanger 300 includes a first main path 301 and a first branch path 302, the first main path 301 is connected to the second heat exchanger 400, the first branch path 302 is connected to the fluid infusion port 102 of the compressor 210, and the second heat exchanger 400 is connected to the suction port 212 of the compressor 210.

The compression cycle circuit of the present embodiment can achieve a single-chamber refrigeration effect. In this embodiment, the first heat exchanger 300 is a condenser, and the second heat exchanger 400 is an evaporator.

In other words, the outlet of the first heat exchanger 300 is provided with a flow dividing node, and the condensed refrigerant is divided into two paths at the flow dividing node: one path is a first main path 301, the refrigerant of the first main path 301 passes through the main path throttling element 500 and then is connected to the second heat exchanger 400, and the outlet of the second heat exchanger 400 is connected to the suction port 212 of the compressor 210. The other branch is a first branch 302, the first branch 302 is a liquid supplementing branch, and the condensed refrigerant is directly connected with the gas supplementing port 102 through a three-way valve.

The intersection point of the first main road 301 and the first branch road 302 is a shunting node. Through the direct fluid infusion of first branch 302, realize the lubrication of compression process, sealed and the cooling effect.

As shown in fig. 5, in another embodiment of the present invention, the compression cycle system further includes a first four-way valve 310 and a first electromagnetic directional valve 510, four ports of the first four-way valve 310 are respectively connected to the exhaust port 211, the first heat exchanger 300, the suction port 212 and the second heat exchanger 400, an inlet of the first electromagnetic directional valve 510 is respectively connected to the first branch 302 and the second heat exchanger 400, an outlet of the first electromagnetic directional valve 510 is connected to the fluid infusion port 102, and valve ports of the first four-way valve 310 and the first electromagnetic directional valve 510 are switched to realize switching between the cooling state and the heating state.

In the cooling state, the first heat exchanger 300 is a condenser, and the second heat exchanger 400 is an evaporator. The exhaust port 211 communicates with the first heat exchanger 300, the intake port 212 communicates with the second heat exchanger 400, and the first branch 302 communicates with the fluid infusion port 102. In the heating state, the first heat exchanger 300 functions as an evaporator, and the second heat exchanger 400 functions as a condenser. The exhaust port 211 is connected to the second heat exchanger 400, the suction port 212 is connected to the first heat exchanger 300, and the primary branch 401 of the second heat exchanger 400 is connected to the fluid infusion port 102. The compression cycle system of the embodiment can realize a single-chamber refrigeration and heating mode.

In other words, first four-way valve 310 includes a first port, a second port, a third port, and a fourth port, and first solenoid directional valve 510 includes a first inlet, a second inlet, and a first outlet.

Specifically, the first port is connected to the discharge port 211 of the compressor, the second port is connected to the first heat exchanger 300, the third port is connected to the suction port 212 of the compressor, and the fourth port is connected to the second heat exchanger 400. The first main path 301 of the first heat exchanger 300 is connected with the primary main path 402 of the second heat exchanger 400, the first branch path 302 is connected with the first inlet, the second inlet is connected with the primary branch path 401 of the second heat exchanger 400, and the first outlet is connected with the fluid infusion port.

In the cooling state, the first port is connected to the second port, the third port is connected to the fourth port, and the first branch 302 is connected to the first inlet. As indicated by the black solid arrows in fig. 5, the refrigerant reaches the four-way valve 310 from the discharge port 211, reaches the first heat exchanger 300, passes through the branching node, and one of the paths passes through the first main path 301, the throttling element 500, the second heat exchanger 400 in this order, and finally returns to the suction port 212. And the other path of the liquid reaches the liquid supplementing port 102 through the first electromagnetic directional valve 510.

In the heating state, the first port is connected to the fourth port, the second port is connected to the third port, and the second inlet is connected to the second heat exchanger 400. As shown by the path indicated by the hollow arrows in dotted lines in fig. 5, the refrigerant passes through the first four-way valve 310 from the air outlet 211, passes through the second heat exchanger 400, passes through the branch point, one of which passes through the primary main path 402, the throttling element 500, and the first heat exchanger 300 in sequence, returns to the air inlet 212, and the other passes through the primary branch path 401, reaches the first electromagnetic directional valve 510, and finally flows to the fluid infusion port 102.

As shown in fig. 6, in another embodiment of the present invention, the compression cycle system further includes a second four-way valve 320 and a third heat exchanger 520, the third heat exchanger 520 includes a first heat exchanging side and a second heat exchanging side, and four ports of the second four-way valve 320 are respectively connected to the suction port 212 and the discharge port 211 of the compressor, the first heat exchanger 300, and the second heat exchanger 400.

Specifically, one end of the first heat exchange side is connected to the first heat exchanger 300, and the other end is connected to the primary main path 402 of the second heat exchanger 400; one end of the second heat exchange side is connected with the secondary branch 401 of the second heat exchanger 400, the other end is connected with the fluid infusion port 102, and the valve port of the second four-way valve 320 is switched to realize the switching between the cooling state and the heating state.

In the cooling state, the first heat exchanger 300 functions as a condenser and the second heat exchanger 400 functions as an evaporator. As indicated by the black solid arrows in fig. 6, the refrigerant is discharged from the discharge port 211, passes through the second four-way selector valve 320, sequentially enters the first heat exchanger 300, the first heat exchanging side, the second heat exchanger 400, and then passes through the second four-way valve 320 to return to the suction port 212. Wherein, the first heat exchange side does not exchange heat in the refrigerating cycle and only serves as a pipeline.

In the heating state, the first heat exchanger 300 functions as an evaporator, the second heat exchanger 400 functions as a condenser, and the third heat exchanger 520 functions as an evaporator. As shown by the dotted hollow arrows in fig. 6, the refrigerant is discharged from the gas outlet 211, passes through the second four-way reversing valve 320, enters the second heat exchanger 400, passes through the flow dividing node, passes through the primary main path 402, the first heat exchanging side, the throttling element 500, the first heat exchanger 300, the second four-way reversing valve 320 in sequence, and finally flows back to the gas inlet. The other path of the fluid flows back to the fluid infusion port 102 after passing through the primary branch 401, the throttling element and the second heat exchange side in sequence.

The evaporation temperature of the loop where the primary main path 402 is located is low, and the arrangement of the third heat exchanger 520 increases the supercooling degree of the loop where the primary main path 402 is located before throttling, so that the enthalpy difference of the second heat exchanger 400 is increased. Meanwhile, by using the relatively high evaporation pressure of the primary branch 401, part of the refrigerant is fed into the compressor from the loop where the primary branch 401 is located, so that the total refrigerant flow during heating is improved, and thus the heating capacity and performance of the system, especially the system performance in a low-temperature environment, are improved.

As shown in fig. 7, in an alternative embodiment of the present invention, the compression cycle system further includes a fourth heat exchanger 410, a second electromagnetic directional valve 530, a third electromagnetic directional valve 540 and a fourth electromagnetic directional valve 550, an outlet of the second heat exchanger 400 is connected to the suction port 212 of the compressor, an inlet of the first heat exchanger 300 is connected to the discharge port 211 of the compressor,

further, the second electromagnetic directional valve 530 is connected to the outlet of the first heat exchanger 300, the inlet of the fourth heat exchanger 410, and the fourth electromagnetic directional valve 550, the third electromagnetic directional valve 540 is connected to the outlet of the fourth heat exchanger 410, the inlet of the second heat exchanger 400, and the fourth electromagnetic directional valve 550 is connected to the fluid infusion port 102.

In this embodiment, the dual chamber refrigeration system has the first heat exchanger 300 as the condenser, the second heat exchanger 400 as the evaporator, and the fourth heat exchanger 410 as the evaporator. Here, the dual-chamber simultaneous cooling state is a path indicated by a black solid arrow in fig. 7, and the refrigerant discharged from the compressor discharge port 211 sequentially passes through the first heat exchanger 300, the second electromagnetic directional valve 530, the throttling element 500, the fourth heat exchanger 410, the third electromagnetic directional valve 540, and the second heat exchanger 400, and finally flows back to the suction port 212 of the compressor.

In addition, the medium-temperature single-chamber cooling state is a path indicated by solid-line open arrows in fig. 7, and the refrigerant discharged from the discharge port 211 sequentially passes through the first heat exchanger 300, the second electromagnetic directional valve 530, the throttling element 500, the fourth heat exchanger 410, the third electromagnetic directional valve 540, and the fourth electromagnetic directional valve 550, and finally flows back to the compressor fluid infusion port 102. The independent refrigerating function of the refrigerating chamber can be realized.

In addition, the low-temperature single-compartment cooling state is a path indicated by a dotted hollow arrow in fig. 7, and the refrigerant discharged from the discharge port 211 passes through the first heat exchanger 300, the second electromagnetic directional valve 530, the fourth electromagnetic directional valve 550, the third electromagnetic directional valve 540, and the second heat exchanger 400 in this order, and finally flows back to the suction port 212. The function of independent refrigeration of the freezing chamber can be realized.

In the embodiment of the utility model, because the compressor is provided with the fluid infusion port 102, compared with the existing compressor only provided with one air suction port, the dual-chamber simultaneous refrigeration or single refrigeration can be realized, and the energy can be better fully utilized by fully utilizing the fluid infusion port 102, thereby avoiding energy waste.

According to the compressor provided by the utility model, the liquid supplementing port is formed in the first cylinder body, the porous bearing sleeve is arranged between the first cylinder body and the second cylinder body, so that the liquid supplementing port is communicated with the inner cavity through the porous bearing sleeve, the liquid entering position from the porous bearing sleeve is determined according to the positions of the piston and the porous bearing sleeve and the action of pressure difference, the effects of lubrication, liquid supplementing, sealing and cooling of the compressor by the liquid entering from the liquid supplementing port are realized, the friction and leakage of the compressor are reduced, the temperature in the compression cavity is reduced, the energy consumption is reduced, the equipment volume is reduced, and the oil-free operation of the compressor is realized.

Further, the compression cycle system provided by the present invention has various advantages as described above since it includes the compressor as described above.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A compressor, comprising: the cylinder comprises a first cylinder body, a second cylinder body and a piston, wherein the first cylinder body and the second cylinder body are sleeved to form an inner cavity, the piston reciprocates in the inner cavity,

an annular groove is formed between the first cylinder body and the second cylinder body, a porous bearing sleeve is installed in the annular groove, and the porous bearing sleeve is a part of the side wall of the inner cavity; the first cylinder body is provided with a through hole to form a fluid infusion port, and the porous bearing sleeve is communicated with one end of the fluid infusion port.

2. The compressor of claim 1, wherein the first cylinder defines an annular inlet channel in annular communication with the annular groove,

the liquid supplementing port is communicated with the porous bearing sleeve through the annular liquid inlet channel.

3. The compressor of claim 1, comprising a suction valve disposed at a front end of the piston and a discharge mechanism disposed at a front end of the second cylinder.

4. The compressor of claim 1, comprising a drive mechanism and a housing, wherein the drive mechanism drives the piston to reciprocate within the internal cavity via a coupling, and the compressor is disposed within the housing.

5. The compressor of claim 4, including a pair of said compressors, said pair of said compressors being driven by a pair of said drive mechanisms, said pair of said compressors being disposed within a common said housing,

wherein the drive mechanisms of a pair of the compressors are arranged facing away from each other.

6. A compression cycle system comprising a first heat exchanger, a second heat exchanger and the compressor of any one of claims 1 to 5, the first heat exchanger, the second heat exchanger and the compressor forming a circulation loop with a fluid replenishment branch.

7. The compression cycle system of claim 6, wherein the discharge port of the compressor is connected to the first heat exchanger, the first heat exchanger includes a first main path and a first branch path, the first main path is connected to the second heat exchanger, the first branch path is connected to the fluid replenishment port of the compressor,

the second heat exchanger is connected with a suction port of the compressor.

8. The compression cycle system of claim 7, further comprising a first four-way valve and a first electromagnetic directional valve, wherein four ports of the first four-way valve are respectively connected to the exhaust port, the first heat exchanger, the suction port and the second heat exchanger, an inlet of the first electromagnetic directional valve is respectively connected to the first branch and the second heat exchanger, an outlet of the first electromagnetic directional valve is connected to the fluid infusion port, and valve ports of the first four-way valve and the first electromagnetic directional valve are switched to realize switching between a cooling state and a heating state,

in the refrigeration state, the exhaust port is communicated with the first heat exchanger, the suction port is communicated with the second heat exchanger, and the first branch is communicated with the liquid supplementing port; in the heating state, the exhaust port is communicated with the second heat exchanger, the air suction port is communicated with the first heat exchanger, and the primary branch of the second heat exchanger is communicated with the liquid supplementing port.

9. The compression cycle system of claim 6, further comprising a second four-way valve and a third heat exchanger, wherein the third heat exchanger comprises a first heat exchanging side and a second heat exchanging side, four ports of the second four-way valve are respectively connected to the exhaust port and the suction port of the compressor, the first heat exchanger, and the second heat exchanger,

one end of the first heat exchange side is connected with the first heat exchanger, the other end of the first heat exchange side is connected with the primary main path of the second heat exchanger, one end of the second heat exchange side is connected with the secondary branch of the second heat exchanger, the other end of the second heat exchange side is connected with the liquid supplementing port, and the valve port of the second four-way valve is switched to realize the switching between the refrigerating state and the heating state.

10. The compression cycle system of claim 6, further comprising a fourth heat exchanger, a second electromagnetic directional valve, a third electromagnetic directional valve and a fourth electromagnetic directional valve, wherein an outlet of the second heat exchanger is connected to a suction port of the compressor, an inlet of the first heat exchanger is connected to a discharge port of the compressor,

the second electromagnetic directional valve is respectively connected with the outlet of the first heat exchanger, the inlet of the fourth heat exchanger and the fourth electromagnetic directional valve, the third electromagnetic directional valve is respectively connected with the outlet of the fourth heat exchanger, the inlet of the second heat exchanger and the fourth electromagnetic directional valve, and the fourth electromagnetic directional valve is connected with the liquid supplementing port.

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