CN214036000U

CN214036000U - Compressor, heat exchange system and electrical equipment

Info

Publication number: CN214036000U
Application number: CN202022667719.4U
Authority: CN
Inventors: 方文杰; 张肃; 高科科
Original assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea White Goods Technology Innovation Center Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-08-24
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a compressor technical field provides a compressor, heat exchange system and electrical equipment, and the compressor includes: the compressor comprises a shell and a compression mechanism, wherein the shell is provided with a first exhaust part and a second exhaust part; the compression mechanism is arranged in the shell and comprises a first piston, a second piston and a cylinder component, the cylinder component forms a first cavity and a second cavity, the first piston is suitable for reciprocating in the first cavity, the second piston is suitable for reciprocating in the second cavity, so that the first cavity and the second cavity are respectively switched between an air suction state and an air discharge state, in the air discharge state, the first air discharge part is communicated with the first cavity, and the second air discharge part is communicated with the second cavity, so that two independent air discharge channels are formed. The utility model provides a compressor adopts reciprocating type structure for a compressor can discharge the compressed gas of two kinds of different exhaust pressures simultaneously, and reciprocating type compact structure helps satisfying miniaturization, lightweight demand.

Description

Compressor, heat exchange system and electrical equipment

Technical Field

The utility model relates to a compressor technical field especially relates to compressor, heat exchange system and electrical equipment.

Background

The compressor is widely applied to the field of electrical equipment such as air conditioners, refrigerators, heat pump dish washing machines, heat pump clothes dryers and the like. With the development of the technology, the double heat pumps are adopted to circularly realize the staged heating, the energy is utilized in a gradient manner, the thermodynamic performance of the heat pump system can be effectively improved, but the compressor in the related technology is generally in a rotor type single exhaust structure, and the staged compression requirement is difficult to meet.

The rotor type single-discharge gas compressor in the related art is used for heating a heat pump in a circulating and grading manner, two compressors are needed, the cost of a heat pump product is increased, the occupied space of the compressors is larger, the integral volume and the weight of the heat pump product are increased, and the requirements of light weight and miniaturization are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a compressor adopts reciprocating type structure, forms two independent exhaust passage for a compressor can discharge the compressed gas of two kinds of different exhaust pressures simultaneously, and reciprocating type structure is compacter, helps the compressor to satisfy miniaturization, lightweight demand.

The utility model discloses still provide a heat exchange system.

The utility model discloses still provide an electrical equipment.

According to the utility model discloses compressor of first aspect embodiment includes:

a housing provided with a first exhaust portion and a second exhaust portion;

the compression mechanism is arranged in the shell and comprises a first piston, a second piston and a cylinder component, the cylinder component constructs a first cavity and a second cavity, the first piston is suitable for reciprocating in the first cavity, the second piston is suitable for reciprocating in the second cavity, so that the first cavity and the second cavity are respectively switched between an air suction state and an air exhaust state, in the air exhaust state, the first air exhaust part is communicated with the first cavity, and the second air exhaust part is communicated with the second cavity, so that two independent air exhaust channels are formed.

According to the embodiment of the utility model, the compressor comprises two pistons and two exhaust parts to form two independent exhaust channels, so that one compressor can realize the functions of two compressors, and the cost, the volume and the weight of the product are reduced; the reciprocating structure is more compact, the size of the compressor can be further reduced, the compressor can meet the requirements of miniaturization and light weight, and further the electrical equipment provided with the compressor can meet the requirements of miniaturization and light weight.

According to an embodiment of the invention, the drive shaft comprises a drive shaft, the drive shaft being rotatable for driving the first piston and the second piston away from or towards the drive shaft.

According to an embodiment of the present invention, the driving shaft is connected to the first piston through a first connecting rod, two ends of the first connecting rod are respectively rotatably connected to the driving shaft and the first piston, the driving shaft is configured to drive the first connecting rod to eccentrically rotate so that the first connecting rod drives the first piston to reciprocate;

the driving shaft is connected with the second piston through a second connecting rod, two ends of the second connecting rod are respectively connected with the driving shaft and the second piston in a rotating mode, and the driving shaft is used for driving the second connecting rod to rotate eccentrically so that the second connecting rod drives the second piston to reciprocate.

According to an embodiment of the present invention, the bilateral symmetry of the drive shaft is provided with the first piston and the second piston, the center of the first piston with the center of the second piston and the center line of the first connecting rod with the center line of the second connecting rod are on the same plane.

According to an embodiment of the present invention, the first connecting rod and the second connecting rod have the same structure, the first connecting rod includes a rod portion and a first protruding portion, the first protruding portion protrudes from the rod portion in an axial direction of the first connecting rod with respect to an axis of rotation of the first piston, and the first protruding portion is connected to the first piston and protrudes toward a direction of the second connecting rod;

the second link is installed on the drive shaft in a direction opposite to the first link such that the first protrusion of the second link protrudes toward the first link.

According to an embodiment of the present invention, the first link further includes a second protruding portion, the second protruding portion is opposite to the first protruding portion with respect to the protruding direction of the lever portion, the second protruding portion is connected to the driving shaft.

According to an embodiment of the invention, the first protruding portion and the second protruding portion each comprise an inclined portion extending along the stem portion obliquely to a direction away from the stem portion.

According to an embodiment of the present invention, the first connecting rod includes a first shaft connecting portion, a second shaft connecting portion, and a first piston connecting portion connecting the first shaft connecting portion and the second shaft connecting portion, the first piston connecting portion is connected to the first piston, the first shaft connecting portion and the second shaft connecting portion are both connected to the driving shaft, and a mounting groove is provided between the first shaft connecting portion and the second shaft connecting portion;

the second connecting rod comprises a second piston connecting part and a third shaft connecting part which are connected with each other, the second piston connecting part is connected with the second piston, and the third shaft connecting part is connected with the driving shaft and is positioned in the mounting groove.

According to an embodiment of the present invention, the driving shaft includes a first connecting portion and a second connecting portion, an eccentric first roller is fixedly sleeved on an outer side of the first connecting portion, and the first connecting rod is rotatably sleeved on an outer side of the first roller; the outer side of the second connecting part is fixedly sleeved with an eccentric second roller, and the outer side of the second roller is rotatably sleeved with the second connecting rod.

According to the utility model discloses an embodiment, be equipped with first passageway, second passageway and third passageway in the drive shaft, the casing limits out the intercommunication cavity that is used for holding lubricating fluid, first passageway with intercommunication cavity intercommunication, first passageway is followed the axial extension of drive shaft just first passageway is in eccentric settings in the drive shaft, the second passageway encircles the drive shaft just the both ends of second passageway communicate respectively first passageway with the third passageway, the third passageway includes the edge the axial extension of drive shaft extends to the intercommunication portion of drive shaft tip and edge the radial extension of drive shaft extends to the lubrication portion of the lateral wall of drive shaft.

According to an embodiment of the present invention, an air inlet portion is provided on the housing, and the housing defines a communicating cavity adapted to communicate with the first cavity and the second cavity;

the first chamber is adapted to be switched between communication with the intake portion and communication with the first exhaust portion, one of the intake portion and the first exhaust portion being in contact communication with the cylinder member, and the other being adapted to be in non-contact communication with the cylinder member through the communication chamber;

the second cavity is adapted to be switched between communication with the intake portion and communication with the second exhaust portion, one of the intake portion and the second exhaust portion being in contact communication with the cylinder member, and the other being adapted to be in non-contact communication with the cylinder member through the communication cavity.

According to the utility model discloses an embodiment, first exhaust portion with second exhaust portion all with cylinder part contact is connected and the symmetry is located cylinder part's both sides.

According to one embodiment of the present invention, the cylinder block defines a first intake chamber, a second intake chamber, a first exhaust chamber and a second exhaust chamber,

under the condition that the first cavity and the second cavity are communicated with the air inlet part, the air inlet part is communicated with the first cavity through the first air inlet cavity and communicated with the second cavity through the second air inlet cavity;

and/or under the condition that the first cavity is communicated with the first exhaust part and the second cavity is communicated with the second exhaust part, the first exhaust part is communicated with the first cavity through the first exhaust cavity, and the second exhaust part is communicated with the second cavity through the second exhaust cavity.

According to the second aspect of the present invention, the heat exchange system comprises a first condenser, a second condenser, a throttling device, an evaporator and the compressor of the above embodiment, wherein the first condenser, the throttling device, the evaporator and the compressor are connected to form a first heat exchange loop, and the first condenser is connected to the first exhaust part; the second condenser, the throttling device, the evaporator and the compressor are connected to form a second heat exchange loop, and the second condenser is connected with the second exhaust part.

According to the third aspect of the present invention, the electrical equipment comprises the compressor of the above embodiment, or the heat exchange system of the above embodiment.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

the compressor provided by the embodiment of the utility model comprises two pistons and two exhaust parts, wherein the first piston and the second piston reciprocate to compress gas, and the first compressed gas and the second compressed gas are discharged to form two independent exhaust channels, so that one compressor can realize the functions of two compressors, and the cost, the volume and the weight of the product are reduced; the reciprocating structure is more compact, the size of the compressor can be further reduced, the compressor can meet the requirements of miniaturization and light weight, and further the electrical equipment provided with the compressor can meet the requirements of miniaturization and light weight.

Further, the utility model discloses heat exchange system, usable double exhaust mode provide two kinds of condensing temperature's refrigerant, carry out the heat transfer in grades, thereby carry out the energy step and utilize and promote heat transfer performance.

Further, the utility model discloses electrical equipment helps satisfying miniaturized and lightweight demand to promote electrical equipment's user experience.

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

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or 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 these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a compressor according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of a compression mechanism of a compressor according to an embodiment of the present invention; the silencing body is not shown in the figure;

fig. 3 is a schematic top view of a compression mechanism of a compressor according to an embodiment of the present invention; the silencing body is not shown in the figure;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 3;

fig. 5 is a schematic side view of a compressing mechanism of a compressor according to an embodiment of the present invention; the silencing body is not shown in the figure;

FIG. 6 is a schematic cross-sectional view of B-B in FIG. 5; wherein, the driving shaft is in an initial state, and the first piston and the second piston are in a state of finishing air exhaust;

FIG. 7 is a schematic cross-sectional view of B-B of FIG. 5; wherein the driving shaft is in a state of rotating by 90 degrees, and the first piston and the second piston are in a suction state;

FIG. 8 is a schematic cross-sectional view of B-B in FIG. 5; the driving shaft is in a state of rotating 180 degrees, and the first piston and the second piston are in a state of completing air suction;

FIG. 9 is a schematic cross-sectional view of B-B in FIG. 5; wherein the driving shaft is in a state of rotating by 270 degrees, and the first piston and the second piston are in an exhaust state;

fig. 10 is a schematic perspective view illustrating a first link (or a second link) of a compression mechanism of a compressor according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a driving shaft of a compressor according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a compressor according to another embodiment of the present invention;

fig. 13 is a schematic perspective view of a compression mechanism of a compressor according to another embodiment of the present invention; the silencing body is not shown in the figure;

fig. 14 is a schematic top view of a compression mechanism of a compressor according to another embodiment of the present invention; the silencing body is not shown in the figure;

FIG. 15 is a schematic cross-sectional view of C-C of FIG. 14;

fig. 16 is a schematic perspective view of a first connecting rod of a compression mechanism of a compressor according to another embodiment of the present invention;

fig. 17 is a schematic perspective view of a driving shaft of a compressor according to another embodiment of the present invention;

fig. 18 is a schematic structural view of a heat exchange system according to a first embodiment of the present invention, in which arrows indicate a flow direction of a refrigerant in a heating process;

fig. 19 is a schematic structural diagram of a heat exchange system according to a first embodiment of the present invention, in which arrows indicate a flow direction of a refrigerant in a refrigeration process; the dashed box represents the application space;

fig. 20 is a schematic structural view of a heat exchange system according to a second embodiment of the present invention, in which arrows indicate a flow direction of a refrigerant in a heating process; the dashed box represents the application space.

Reference numerals:

100: a housing; 110: a first exhaust portion; 120: a second exhaust section; 130: an air intake portion; 140: an oil return section; 150: the cavity is communicated;

200: a compression mechanism; 210: a first piston; 220: a second piston; 230: a cylinder part; 231: a cylinder body; 2311: a first cavity; 2312: a second cavity; 2313: an air intake valve; 2314: an exhaust valve; 232: a noise elimination body; 2321: a first air intake chamber; 2322: a second air intake chamber; 2323: a first exhaust cavity; 2324: a second exhaust chamber; 240: a first link; 241: a lever portion; 242: a first boss portion; 243: a second boss portion; 244: an inclined portion; 245: a first shaft connecting portion; 246: a second shaft connecting portion; 247: a first piston connecting portion; 248: mounting grooves; 250: a second link; 251: a second piston connecting portion; 252: a third shaft connection portion; 260: a first roller; 261: a first upper roller; 262: a first lower roller; 270: a second roller;

300: a drive shaft; 310: a first connection portion; 320: a second connecting portion; 330: a first channel; 340: a second channel; 350: a third channel; 351: a communicating portion; 352: a lubricating section; 360: a support portion; 370: a drive section; 380: a circumferential limiting part;

400: a drive motor; 500: a support member; 600: a machine base;

710: a first condenser; 720: a second condenser; 730: a first throttling device; 740: a second throttling device; 750: a first evaporator; 760: a second evaporator; 770: a first oil separator; 780: a second oil separator; 790: a first four-way valve; 800: a second four-way valve; 810: an evaporator.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, 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" should 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. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

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 invention. 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 first aspect of the present invention, as shown in fig. 1 to 17, provides a compressor, which includes a casing 100 and a compression mechanism 200 disposed in the casing 100, wherein the casing 100 is provided with a first exhaust portion 110 and a second exhaust portion 120; the compression mechanism 200 includes a first piston 210, a second piston 220, and a cylinder part 230, the cylinder part 230 configures a first cavity 2311 adapted to communicate with the first exhaust portion 110 and a second cavity 2312 adapted to communicate with the second exhaust portion 120, the first piston 210 is adapted to reciprocate within the first cavity 2311 and the second piston 220 is adapted to reciprocate within the second cavity 2312 to switch the first cavity 2311 and the second cavity 2312 between an intake state and an exhaust state, respectively, in which the first exhaust portion 110 communicates with the first cavity 2311 and the second exhaust portion 120 communicates with the second cavity 2312 to form two independent exhaust passages.

When the first cavity 2311 and the second cavity 2312 are both in the exhaust state, the first piston 210 moves in the first cavity 2311 to compress the gas in the first cavity 2311, the second piston 220 moves in the second cavity 2312 to compress the gas in the second cavity 2312, the first cavity 2311 is communicated with the first exhaust portion 110 to form a first exhaust passage, and the second cavity 2312 is communicated with the second exhaust portion 120 to form a second exhaust passage. The first compressed gas compressed and discharged by the first cavity 2311 is discharged out of the compressor along the first exhaust passage, the second compressed gas compressed and discharged by the second cavity 2312 is discharged out of the compressor along the second exhaust passage, and the first exhaust passage and the second exhaust passage are not communicated for independent exhaust, so that the compressor can discharge two paths of independent compressed gas for a heat exchange system with double heat exchange loops, such as double heat pump circulation, for staged heating.

When the first cavity 2311 and the second cavity 2312 are both in the air suction state, the first exhaust passage and the second exhaust passage are both closed, the first piston 210 moves in the first cavity 2311 in the opposite direction relative to the air discharge state to suck air into the first cavity 2311, and the second piston 220 moves in the second cavity 2312 in the opposite direction relative to the air discharge state to suck air into the second cavity 2312.

It should be noted that, the first cavity 2311 and the second cavity 2312 may be, but are not limited to, in an exhaust state or in an intake state at the same time, and therefore, when the first cavity 2311 is in the exhaust state, the second cavity 2312 may be in the intake state, and when the first cavity 2311 is in the intake state, the second cavity 2312 may be in the exhaust state, and the states of the first cavity 2311 and the second cavity 2312 may be set according to actual needs.

It should be further noted that the states of the first cavity 2311 and the second cavity 2312 are not limited to include an air suction state and an air discharge state, and may also include a compression state, where the compression state may be understood as that the first cavity 2311 and the second cavity 2312 are closed, that is, the air suction valve 2313 and the air discharge valve 2314 for adjusting the states of the first cavity 2311 and the second cavity 2312 are both closed, the first cavity 2311 and the second cavity 2312 stop sucking air, and the first piston 210 and the second piston 220 move and compress air until the pressures in the first cavity 2311 and the second cavity 2312 reach the opening pressure of the air discharge valve 2314.

The compressor of the embodiment performs gas compression through the reciprocating motion of the first piston 210 and the second piston 220, discharges the first compressed gas and the second compressed gas, and one compressor can discharge two refrigerants with different discharge pressures at the same time, thereby realizing the functions of the two compressors and reducing the cost, the volume and the weight of the product. And the reciprocating structure is more compact, so that the volume of the compressor is smaller. Wherein the pressure of the first compressed gas and the pressure of the second compressed gas can be the same or different. When the pressure of the first compressed gas is different from that of the second compressed gas, one compressor can output different exhaust pressures, so that the method is suitable for double-heat-pump circulation of staged heating, energy cascade utilization is carried out, and the thermodynamic performance of a heat pump system is effectively improved. Wherein, the different realization mode of first compressed gas and second compressed gas's pressure can be: the opening pressures of the exhaust valves 2314 corresponding to the first cavity 2311 and the second cavity 2312 are different in magnitude.

The first exhaust part 110 and the second exhaust part 120 may be openings formed in the casing 100, pipes connected to the casing 100, or other structures capable of guiding out the compressed gas, and thus, description thereof is omitted. The first cavity 2311 and the first exhaust portion 110 are turned on and off by an exhaust valve 2314 corresponding to the first cavity 2311, and the second cavity 2312 and the second exhaust portion 120 are also turned on and off by an exhaust valve 2314 corresponding to the second cavity 2312.

The first exhaust passage may be a passage formed by abutting the first exhaust portion 110 with the outlet position of the first cavity 2311, a passage formed by communicating the first exhaust portion 110 with the outlet position of the first cavity 2311 through an intermediate member, a passage formed by communicating the first exhaust portion 110 with the outlet position of the first cavity 2311 through a cavity in the housing 100, or other manners capable of forming a passage, which are not listed here. Similarly, the second exhaust passage is formed in one of the first exhaust passages, and the description thereof is omitted here. It should be noted that the first exhaust passage and the second exhaust passage in the same compressor may have the same or different structures.

Referring to fig. 1 and 12, it will be appreciated that the compressor includes a drive shaft 300, and the rotatable drive shaft 300 is used to drive the first and

second pistons

210 and 220 away from or toward the drive shaft 300. The one driving shaft 300 simultaneously drives the first piston 210 and the second piston 220 to reciprocate, and the driving shaft 300 is provided with respect to each piston, which helps to simplify the driving structure of the compressor, thereby simplifying the internal structure of the compressor and helping to reduce the volume of the compressor.

Referring to fig. 1 and 12, the first piston 210 and the second piston 220 are synchronously far away from the driving shaft 300, it may be understood that the gas in the first cavity 2311 and the gas in the second cavity 2312 are synchronously compressed or discharged, and the first piston 210 and the second piston 220 are synchronously close to the driving shaft 300, it may be understood that the first cavity 2311 and the second cavity 2312 are synchronously sucked, and in the following embodiments, the corresponding relationship shown in fig. 1 and 12 is taken as an example for explanation.

It should be noted that the first piston and the second piston are synchronously far away from the driving shaft, or the first cavity and the second cavity are synchronously sucked, the first piston and the second piston are synchronously close to the driving shaft, or the first cavity and the second cavity are synchronously compressed or exhausted (not shown in the figure). The position of the first and

second pistons

210 and 220 with respect to the driving shaft 300 is changed such that the operating states of the first and

second chambers

2311 and 2312 are changed in relation to the positions of the suction and

exhaust valves

2313 and 2314, which is not limited in this embodiment. Of course, the first piston 210 and the second piston 220 are not limited to synchronous movement, and the movement processes of the first piston 210 and the second piston 220 have certain independence and can be selected according to needs.

As shown in fig. 1 and 12, the driving motor 400 may provide a rotational driving force for the driving shaft 300, and the driving motor 400 may also be disposed in the housing 100.

As will be understood from fig. 1 and 12, the driving shaft 300 is connected to the first piston 210 through the first connecting rod 240, two ends of the first connecting rod 240 are respectively rotatably connected to the driving shaft 300 and the first piston 210, and the driving shaft 300 is configured to drive the first connecting rod 240 to eccentrically rotate so that the first connecting rod 240 drives the first piston 210 to reciprocate. In the process that the first end of the first link 240 connected with the driving shaft 300 eccentrically rotates, the first end drives the second end (the end of the first link 240 connected with the first piston 210) to rotate relative to the first piston 210, in the process, the distance from the center of the first end to the first cavity 2311 is gradually increased or gradually decreased, when the distance from the center of the first end to the first cavity 2311 is gradually increased, the first link 240 drives the first piston 210 to move towards the direction close to the driving shaft 300, and at the moment, the first cavity 2311 sucks air; similarly, when the distance from the center of the first end to the first cavity 2311 is gradually decreased, the first link 240 drives the first piston 210 to move in a direction away from the driving shaft 300, and at this time, the first cavity 2311 compresses or discharges the gas. The driving shaft 300 and the piston are connected by the connecting rod, so that the structure is simple and convenient to install, and the structure of the compressor is simplified.

The driving shaft 300 is connected to the second piston 220 through a second connecting rod 250, two ends of the second connecting rod 250 are respectively rotatably connected to the driving shaft 300 and the second piston 220, and the driving shaft 300 is used for driving the second connecting rod 250 to eccentrically rotate so that the second connecting rod 250 drives the second piston 220 to reciprocate. In combination with the above, the movement manner of the second connecting rod 250 and the relative positional relationship change process between the second cavity 2312, the second piston 220, the second connecting rod 250 and the driving shaft 300 are the same as the movement manner of the first connecting rod 240 and the relative positional relationship change process between the first cavity 2311, the first piston 210, the first connecting rod 240 and the driving shaft 300, and therefore, reference is made to the above description, and details are not repeated here.

The two pistons are connected with the driving shaft 300 in the same manner, and the motion principles of the two pistons are the same, so that the structure is further simplified, the size of the compressor is reduced conveniently, and the compressor is developed towards miniaturization and light weight.

As can be understood from fig. 1 and 12, the first piston 210 and the second piston 220 are symmetrically disposed on both sides of the driving shaft 300, which helps to improve the symmetry of the structure on both sides of the driving shaft 300, ensure the mounting stability of the driving shaft 300, and reduce the noise generated by the vibration of the driving shaft 300. In addition, the center of the first piston 210, the center of the first connecting rod 240, the center of the second connecting rod 250 and the center of the second piston 220 are on the same plane, so that reciprocating inertia force generated by reciprocating motion of the pistons is relatively offset on the same horizontal plane, reciprocating inertia force generated during operation of the compressor is effectively and automatically balanced, vibration of the compressor is reduced, and noise generated during operation of the compressor can be reduced.

Referring to fig. 1, 5 to 9, as shown in fig. 6, when the driving shaft 300 is in the initial state, that is, the first piston 210 and the second piston 220 are in the exhaust completion state, the center lines of the first piston 210, the first connecting rod 240, the second connecting rod 250, and the second piston 220 are collinear; as shown in fig. 7, when the driving shaft 300 rotates in a clockwise direction and rotates to 90 °, the first end of the first link 240 and the first end of the second link 250 are both deviated from the initial position and the center of the first end of the first link 240 is far away from the first cavity 2311 to suck the first cavity 2311, and the center of the first end of the second link 250 is far away from the second cavity 2312 to suck the second cavity 2312; as shown in fig. 8, the driving shaft 300 continues to rotate clockwise and rotate to 180 °, the distance from the center of the first end of the first connecting rod 240 to the first cavity 2311 is maximized, the distance from the center of the first end of the second connecting rod 250 to the second cavity 2312 is also maximized, the air suction amount is maximized, and the air suction process is completed; as shown in fig. 9, the driving shaft 300 continues to rotate clockwise and to 270 °, which is a venting process, the position of the first piston 210 in the first cavity 2311 and the position of the second piston 220 in the second cavity 2312 are the same as those in fig. 7, except that the relative positions of the first end of the first link 240 and the first end of the second link 250 are changed, and the first piston 210 and the second piston 220 compress gas; the drive shaft 300 continues to rotate clockwise and returns to the position shown in fig. 6, completing one cycle of intake and exhaust. Wherein, during the movement of the driving shaft 300, the acting forces of the first link 240 and the second link 250 balance each other to ensure the smooth operation of the compressor.

It should be noted that, in the present embodiment, the first piston 210 and the second piston 220 are symmetrically disposed on both sides of the driving shaft 300, so that the driving shaft has better operation stability and less noise, but in other embodiments, the first piston and the second piston may be asymmetrically connected to the driving shaft, the structure and relative position relationship of the first piston and the second piston may be selected according to needs, and the stability and the noise may be adjusted by other manners.

In order to ensure symmetry and stability of the structure of both sides of the driving shaft 300, the following provides an embodiment of the first and

second links

240 and 250.

Referring to fig. 4, 6 and 10, it can be understood that the first piston 210 and the second piston 220 are symmetrically disposed on both sides of the driving shaft 300, and the first connecting rod 240 and the second connecting rod 250 have the same structure and are disposed on both sides of the driving shaft 300 such that the first connecting rod 240 is connected to the first piston 210 and the second connecting rod 250 is connected to the second piston 220, thereby ensuring the symmetry of the structure on both sides of the driving shaft 300, which helps to ensure the stability of the compression mechanism 200 during the rotation of the driving shaft 300 and reduce vibration.

The structure of the first link 240 and the second link 250 will be described by taking the first link 240 as an example. Wherein the first connecting rod 240 includes a rod body portion 241 and a first protrusion 242, the first protrusion 242 protrudes the rod body portion 241 in an axial direction of the first connecting rod 240 with respect to the rotational axis of the first piston 210, and the first protrusion 242 of the first connecting rod 240 is connected to the first piston 210 and protrudes toward the second connecting rod 250; the first link 240 has the same structure as the second link 250, that is, the second link 250 also includes a lever body portion 241 and a first protrusion 242, and the second link 250 is installed in the opposite direction to the first link 240 on the driving shaft 300 such that the first protrusion 242 of the second link 250 protrudes toward the first link 240. Compared with two parallel flat connecting rods, the arrangement of the two first protruding parts 242 is beneficial to the center of the two connecting rods and the center of the two pistons being coplanar, so that reciprocating inertia force is relatively offset on the same plane, reciprocating inertia force generated when the compressor operates is effectively and automatically balanced, and vibration of the compressor is smaller so that a silencing effect is better. In addition, the first protrusion 242 also helps to strengthen the structural strength of the first link 240 and the second link 250, and increases the lifespan of the first link 240 and the second link 250.

The first protrusion 242 is disposed around the portion of the first connecting rod 240 (or the second connecting rod 250) for rotatably connecting the first piston 210 (or the second piston 220), so as to ensure structural uniformity of the first connecting rod 240. The first link 240 and the second link 250 are arranged side by side in the axial direction of the driving shaft 300, as shown in fig. 1 and 4, the first link 240 is located below the second link 250, the first protrusion 242 of the first link 240 protrudes upward, and the first protrusion 242 of the second link 250 protrudes downward, so that the center of the first link 240, the center of the second link 250, the center of the first piston 210, and the center of the second piston 220 are on the same horizontal plane, and structural symmetry on both sides of the driving shaft 300 is sufficiently ensured.

The first protrusion 242 may be integrally formed with the first body 241, such as integrally cast, integrally stamped, or welded. Or, the first protruding portion 242 is connected to the first rod portion 241 in a detachable connection manner, such as a threaded connection, a clamping connection, an insertion connection or a fastener connection, and the first protruding portion 242 is detachably connected to the first rod portion 241 to facilitate size adjustment, so that the shape design of the first connecting rod 240 is more flexible. The second connecting rod 250 may be machined in the above-mentioned manner or in other manners, which is not limited herein. Of course, the first link 240 and the second link 250 are processed in the same manner, so that the process is simplified and the assembly is facilitated.

Referring to fig. 1 to 4 and 11, it can be understood that the first link 240 further includes a second protruding portion 243, the protruding direction of the second protruding portion 243 is opposite to that of the first protruding portion 242 with respect to the rod portion 241, the second protruding portion 243 is connected to the driving shaft 300, the second protruding portion 243 cooperates with the first protruding portion 242 to facilitate adjusting the center of the first rod, which helps to improve structural symmetry, and the second protruding portion 243 also reinforces the first link 240. Of course, the second link 250 is also provided with a second convex portion 243.

Referring to fig. 1 and 4, the second boss 243 is disposed around the drive shaft 300. The second boss 243 of the first link 240 protrudes downward, and the second boss 243 of the second link 250 protrudes upward to be engaged with the first boss 242.

The connection manner of the second protruding portion 243 and the rod portion 241 may be the same as the connection manner of the first protruding portion 242 and the rod portion 241, and will not be described herein again.

As will be understood from fig. 1, 4 and 10, each of the first and second protruding

portions

242 and 243 includes an inclined portion 244 extending obliquely along the rod portion 241 in a direction away from the rod portion 241. The first protruding portion 242 and the second protruding portion 243 are in inclined transition with the rod portion 241 through the inclined portion 244, so that the structural uniformity of the first rod body is improved, and the problem of local stress concentration of the rod portion 241 is relieved.

Wherein, the inclined part 244 extends obliquely in an inclined plane or in an inclined curved surface, and the surface shape of the inclined part 244 can be selected according to actual needs.

Of course, the structure of the first link 240 and the second link 250 is not limited to the above structure, and other structures may be used to help maintain the symmetry of the compression mechanism 200.

Referring to fig. 12, 15 and 16, the first link 240 and the second link 250 in the above-described embodiment may be replaced with the following structure.

As shown in fig. 12, 15 and 16, the first link 240 includes a first shaft connecting portion 245, a second shaft connecting portion 246 and a first piston connecting portion 247 connecting the first shaft connecting portion 245 and the second shaft connecting portion 246, the first piston connecting portion 247 is connected to the first piston 210, the first shaft connecting portion 245 and the second shaft connecting portion 246 are both connected to the driving shaft 300, and an installation groove 248 is formed between the first shaft connecting portion 245 and the second shaft connecting portion 246. The second connecting rod 250 includes a second piston connecting portion 251 and a third shaft connecting portion 252 connected to each other, the second piston connecting portion 251 connecting the second piston 220, and the third shaft connecting portion 252 connecting the driving shaft 300 and located in the mounting groove 248, and a center line of the first connecting rod 240 is coplanar with a center line of the second connecting rod 250, that is, a center of the first piston 210, a center of the first connecting rod 240, a center of the second connecting rod 250, and a center of the second piston 220 are coplanar. In this embodiment, the center of the first link 240 is adjusted by the structure of the first shaft connecting portion 245 and the second shaft connecting portion 246 which are arranged in parallel, so that the center of the first link 240 and the center of the second link 250 are coplanar, and the reciprocating inertia force generated by the movement of the first piston 210 and the second piston 220 is relatively offset on the same plane, thereby effectively and automatically balancing the reciprocating inertia force generated during the operation of the compressor, and reducing the vibration of the compressor to improve the silencing effect.

In this embodiment, the structure of the second link 250 is different from that of the first link 240, and the first link 240 and the second link 250 are both in an up-down symmetrical structure, which is helpful to ensure the structural stability of the first link 240 and the second link 250, and is also convenient to process. Referring to fig. 16, the first shaft coupling part 245 and the second shaft coupling part 246 of the first link 240 form a U-shaped structure opened toward the second link 250, and the mounting groove 248 is a U-shaped groove.

As shown in fig. 1, 4, 11, 12, 15 and 17, it can be understood that the driving shaft 300 includes a first connecting portion 310 and a second connecting portion 320, the outer side of the first connecting portion 310 is fixedly sleeved on the eccentric first roller 260, and the outer side of the first roller 260 is rotatably sleeved on the first link 240; the eccentric second roller 270 is fixedly sleeved on the outer side of the second connecting portion 320, and the second link 250 is rotatably sleeved on the outer side of the second roller 270. The first connecting rod 240 and the second connecting rod 250 are connected with the driving shaft 300 through rollers, the rollers are simple in structure, the processing precision of the rollers is high, and the requirement for precision of the compressor is met. Compared with the mode of connecting the driving shaft 300 and the connecting rod through the bearing, the structure of the roller is simpler than that of the bearing, the processing precision of the roller is higher than that of the bearing, and the bearing is generally a standard component, and the eccentricity needs to be realized through other structural components, which is not beneficial to simplifying the connection mode of the driving shaft 300 and the connecting rod.

The first connecting portion 310 and the second connecting portion 320 are provided with circumferential limiting portions 380, the roller is provided with a structure matched with the circumferential limiting portions 380, the problem that the roller rotates circumferentially relative to the driving shaft 300 is solved, and the driving shaft 300 and the roller can be fixedly connected under the condition that other structural components are not added. The circumferential position-limiting portion 380 may be a plane, a curved surface with a curvature different from that of the first connecting portion 310 or the second connecting portion 320, a bump, or a groove.

Referring to fig. 1 and 4, two rollers, namely a first roller 260 and a second roller 270, are connected to the driving shaft 300, the first roller 260 is located below the second roller 270, a step is formed between the first connecting portion 310 and the second connecting portion 320 of the driving shaft 300, and the step limits the second roller 270, so that the second roller 270 is prevented from falling under the action of gravity to avoid interference between the first roller 260 and the second roller 270. The radial maximum dimension of the first connection portion 310 is greater than the radial maximum dimension of the second connection portion 320 to ensure that the first roller 260 can be mounted to the first connection portion 310.

Referring to fig. 12 and 15, three rollers are connected to the driving shaft 300, the first roller 260 is divided into a first upper roller 261 and a first lower roller 262, the second roller 270 and the first upper roller 261 are respectively arranged from bottom to top, the first connection portion 310 includes a first upper connection portion and a first lower connection portion, the first lower roller 262 connects the first shaft connection portion 245 and the first lower connection portion of the driving shaft 300, the second roller 270 connects the third shaft connection portion 252 and the second connection portion 320 of the driving shaft 300, and the first upper roller 261 connects the second shaft connection portion 246 and the first upper connection portion of the driving shaft 300. A crankshaft section is formed among the first lower connecting portion, the second connecting portion 320 and the first upper connecting portion, a step is formed between the first lower connecting portion and the second connecting portion 320 to lower limit the second roller 270, and a step is formed between the second connecting portion 320 and the first upper connecting portion to lower limit the first upper roller 261. The radial dimension of the first lower connecting portion is different from the radial dimension of the first upper connecting portion, so the inner diameters of the first lower roller 262 and the first upper roller 261 are different. The first shaft connecting portion 245 and the second shaft connecting portion 246 of the first link 240 may have the same hole diameter, that is, the first lower roller 262 and the first upper roller 261 have the same outer diameter, and the outer diameter of the first lower roller 262 is larger than that of the second roller 270, so that the first link 240 is conveniently installed.

Referring to fig. 12 and 15, the first shaft coupling portion 245 and the second shaft coupling portion 246 each have a thickness less than that of the third shaft coupling portion 252, and the first lower roller 262 and the first upper roller 261 each have a thickness less than that of the second roller 270, so as to equalize the structural size and strength of the first link 240 and the second link 250, which helps to ensure the overall stability of the compression mechanism 200.

As shown in fig. 1, 4, 12 and 15, a support portion 360 is provided below the first connection portion 310 of the driving shaft 300, and a step is also formed between the first connection portion 310 and the support portion 360 to support the roller thereon. The driving part 370 is arranged below the supporting part 360, the driving part 370 penetrates through the cylinder part 230 and is connected with the driving motor 400, the supporting part 360 is limited above the cylinder part 230, and a gasket is arranged between the supporting part 360 and the cylinder part 230 to reduce the abrasion between the supporting part 360 and the cylinder part 230.

As shown in fig. 1, 4, 11, 12, 15, and 17, it can be understood that the driving shaft 300 is provided with a first channel 330, a second channel 340, and a third channel 350 disposed along the axial direction of the driving shaft 300, the housing 100 defines a communication cavity 150 for containing a lubricating fluid, the first channel 330 is communicated with the communication cavity 150, the first channel 330 extends along the axial direction of the driving shaft 300 and the first channel 330 is disposed eccentrically in the driving shaft 300, the second channel 340 extends around the driving shaft 300 and both ends of the second channel 340 are respectively communicated with the first channel 330 and the third channel 350, and the third channel 350 includes a communication portion 351 extending to the end of the driving shaft 300 along the axial direction of the driving shaft 300 and a lubricating portion 352 extending to the side wall of the driving shaft 300 along the radial direction of the driving shaft 300. The lubrication fluid in the communicating chamber 150 is delivered to various positions of the compression mechanism 200 by the cooperation of the plurality of passages on the driving shaft 300 to ensure the lubrication effect of the compression mechanism 200.

Wherein, the storage area (such as oil pool) of the communicating cavity 150 contains the lubricating fluid, and the first channel 330, the second channel 340 and the third channel 350 are distributed from bottom to top in sequence. During the rotation of the driving shaft 300, the lubricating fluid in the eccentrically arranged first channel 330 flows upwards under the action of centrifugal force, so that the lubricating fluid in the first channel 330 flows to the second channel 340 and flows to the third channel 350 under the action of the rotation force of the driving shaft 300 and the guiding action of the second channel 340, a part of the lubricating fluid in the third channel 350 flows out from the lubricating part 352 for lubricating between components, another part of the lubricating fluid in the third channel 350 flows out from the communicating part 351, the lubricating fluid flowing out from the communicating part 351 is thrown to the components (such as the first piston 210 and the second piston 220) on the outer periphery of the driving shaft 300 under the action of the rotation of the driving shaft 300, the whole compression mechanism 200 is lubricated and cooled by the falling process of the lubricating fluid thrown out from the communicating part 351, and the lubricating fluid flows back to the storage area of the communicating cavity 150 for recycling. Wherein, the lubricating fluid can be lubricating oil, and the type of the lubricating oil can be selected according to the requirement.

In this embodiment, the first channel 330 and the third channel 350 are communicated through the second channel 340, but the first channel 330 is not directly communicated with the third channel 350, which is helpful for retaining the lubricating fluid in the third channel 350, and can prevent the lubricating fluid in the third channel 350 from directly flowing back into the first channel 330, so that the lubricating effect on the compression mechanism 200 and the drive shaft 300 is better.

As shown in fig. 1 and 12, the oil return portion 140 is disposed on the casing 100, the oil return portion 140 is communicated with the communicating cavity 150, and the oil return portion 140 returns the lubricating oil, which is carried out of the casing 100 by the compressed gas, to the communicating cavity 150, thereby facilitating the recycling of the lubricating oil. The oil return portion 140 may be an oil return port formed in the housing 100, an oil return pipe connected to the housing 100, or other structures for returning oil.

When the driving shaft 300 is connected to the first link 240 through the first roller 260, the driving shaft 300 is connected to the second link 250 through the second roller 270, the first roller 260 is provided with a passage communicating with the lubrication portion 352, and the second roller 270 is also provided with a passage communicating with the lubrication portion 352, so that the lubrication fluid flows out from the first roller 260 to lubricate between the first link 240 and the first roller 260 and flows out from the second roller 270 to lubricate between the second link 250 and the second roller 270, and the friction force between the first link 240 and the second link 250 is reduced.

As will be appreciated in connection with fig. 1 and 12, the housing 100 is provided with an air inlet 130, the housing 100 defining a communication chamber 150 adapted to communicate with a first chamber 2311 and a second chamber 2312; the first cavity 2311 is adapted to switch between communication with the intake portion 130 and communication with the first exhaust portion 110, one of the intake portion 130 and the first exhaust portion 110 being in contact communication with the cylinder member 230, and the other being adapted to be in non-contact communication with the cylinder member 230 through the communication cavity 150. The air inlet part 130 or the first exhaust part 110 is communicated with the cylinder part 230 in a contact way, the connection stability of the contact communication is good, and the processing is convenient; and the other one adopts non-contact communication, so that the interference of vibration during the operation of the compression mechanism 200 and the driving mechanism can be reduced. The contact communication can be rigid contact or flexible contact, and can be selected according to actual needs.

Similarly, the second cavity 2312 is adapted to switch between communication with the intake portion 130 and communication with the second exhaust portion 120, one of the intake portion 130 and the second exhaust portion 120 is adapted to be in contact communication with the cylinder member 230, and the other is adapted to be in non-contact communication with the cylinder member 230 through the communication cavity 150. The connection manner of the air intake portion 130, the second exhaust portion 120 and the cylinder component 230 can refer to the connection manner of the air intake portion 130, the first exhaust portion 110 and the cylinder component 230, and will not be described herein again.

Referring to fig. 1 and 12, the first exhaust portion 110 and the second exhaust portion 120 are in contact communication with the cylinder member 230, the intake portion 130 is in non-contact communication with the cylinder member 230, the intake portion 130 is in communication with the first cavity 2311 or the second cavity 2312 through the communication cavity 150 to intake air by the compression mechanism 200, and the position of the intake portion 130 on the housing 100 is flexible. Here, the communicating cavity 150 in the present embodiment and the communicating cavity 150 for containing the lubricating fluid described above can be understood as a space in the housing 100.

The air inlet 130 may be an air inlet provided on the casing 100, an air inlet pipe connected to the casing 100, or other structures for air inlet. One or more air inlets 130 may be disposed on the housing 100, when one air inlet 130 is disposed on the housing 100, the air enters the communicating cavity 150 through the air inlet 130 and freely diffuses in the communicating cavity 150, and when the first cavity 2311 and the second cavity 2312 are in an air suction state, the air in the communicating cavity 150 flows into the first cavity 2311 and the second cavity 2312; when the housing 100 is provided with the plurality of air inlets 130, the air may enter the communicating cavity 150 through the plurality of air inlets 130, or the air may directly enter the first cavity 2311 or the second cavity 2312 through each air inlet 130.

Referring to fig. 1 and 12, it can be understood that the first exhaust portion 110 and the second exhaust portion 120 are both connected to the cylinder component 230 in a contact manner and symmetrically disposed on both sides of the cylinder component 230, the first compressed gas exhausted from the first cavity 2311 directly enters the first exhaust portion 110, and the second compressed gas exhausted from the second cavity 2312 directly enters the second exhaust portion 120, which helps to maintain the pressure of the compressed gas, and also avoids the mixing of the first compressed gas and the second compressed gas, thereby improving the independence of the two exhaust passages. The symmetrical arrangement of the first exhaust part 110 and the second exhaust part 120 is also helpful to improve the structural symmetry of the compression mechanism 200, and ensure the balanced stress on the two sides of the compression mechanism 200 and the shell 100. The one air inlet 130 is provided in the casing 100, which contributes to simplifying the structure of the casing 100.

Referring to fig. 1 and 12, it can be appreciated that the cylinder block 230 defines a first intake chamber 2321 and a second intake chamber 2322, and in the case where both the first and

second cavities

2311 and 2312 communicate with the intake 130, the intake 130 communicates with the first cavity 2311 through the first intake chamber 2321 and communicates with the second cavity 2312 through the second intake chamber 2322; in the process that the air inlet portion 130 admits air to the first cavity 2311, air firstly passes through the first air inlet cavity 2321, which is beneficial to reducing noise generated in the air inlet process of the first cavity 2311, and in the same way, when the air inlet portion 130 admits air to the second cavity 2312, air firstly passes through the second air inlet cavity 2322, which is beneficial to reducing noise generated in the air inlet process of the second cavity 2312.

Referring to fig. 1 and 12, in the process that the air intake portion 130 intakes air into the first cavity 2311, air firstly enters the communicating cavity 150, air in the communicating cavity 150 enters the first air intake cavity 2321 and the second air intake cavity 2322, air in the first air intake cavity 2321 is sucked into the first cavity 2311, air in the second air intake cavity 2322 is sucked into the second cavity 2312, and the air suction process is buffered in multiple stages, which is helpful for reducing air suction noise. The inlets of the first air intake cavity 2321 and the second air intake cavity 2322 are both arranged below the cavities, the inlet of the first cavity 2311 is arranged at a position above the first air intake cavity 2321, and the inlet of the second cavity 2312 is arranged at a position above the second air intake cavity 2322, so that the gas is promoted to enter the first cavity 2311 and the second cavity 2312 by utilizing the principle of upward diffusion of the gas. The intake portion 130 is disposed proximate to an inlet of the first intake chamber 2321 and/or the second intake chamber 2322.

It can also be understood that the cylinder block 230 restricts the first exhaust chamber 2323 and the second exhaust chamber 2324, in the case where the first chamber 2311 communicates with the first exhaust portion 110 and the second chamber 2312 communicates with the second exhaust portion 120, the first exhaust portion 110 communicates with the first chamber 2311 through the first exhaust chamber 2323, the second exhaust portion 120 communicates with the second chamber 2312 through the second exhaust chamber 2324, the first compressed gas exhausted from the first chamber 2311 muffles sound through the first exhaust chamber 2323 and then enters the first exhaust portion 110, and the second compressed gas exhausted from the second chamber 2312 muffles sound through the second exhaust chamber 2324 and then enters the second exhaust portion 120, which helps to reduce exhaust noise.

In combination with the above, the cylinder block 230 may simultaneously define the first intake chamber 2321, the second intake chamber 2322, the first discharge chamber 2323 and the second discharge chamber 2324, and simultaneously perform the functions of intake noise reduction and discharge noise reduction, which may help to reduce the noise of the compressor.

The cylinder component 230 includes a cylinder body 231 and a muffler body 232 connected to the cylinder body 231, the cylinder body 231 defines a first cavity 2311 and a second cavity 2312, an intake valve 2313 and an exhaust valve 2314 are respectively disposed at positions of the cylinder body 231 corresponding to the first cavity 2311 and the second cavity 2312, the intake valve 2313 is opened and the exhaust valve 2314 is closed in an intake state, and the exhaust valve 2314 is opened and the intake valve 2313 is closed in an exhaust state. The muffler body 232 is disposed outside the cylinder body 231, and the muffler body 232 restricts the first intake chamber 2321, the second intake chamber 2322, the first exhaust chamber 2323, and the second exhaust chamber 2324, and in the intake state, the gas reenters the cylinder body 231 through the muffler body 232, and in the exhaust state, the gas is reentered to the first exhaust portion 110 and the second exhaust portion 120 through the muffler body 232.

The muffling body 232 includes a first body and a second body, the first body is provided with a first intake chamber 2321 and a first exhaust chamber 2323, and the second body is provided with a second intake chamber 2322 and a second exhaust chamber 2324. The first body and the second body can be an integral structure or two independent components, and the structure of the sound attenuation body 232 can be selected according to actual needs. The sound attenuating body 232 may also be provided with sound attenuating holes, coatings, or other structures to aid in attenuating sound and reducing noise. It should be noted that, when the first exhaust portion and the second exhaust portion are both communicated with the silencing body in a contact manner, the structure corresponding to the first exhaust cavity 2323 and the second exhaust cavity 2324 cannot be provided with silencing holes, so that the two compressed gases are prevented from being mixed with other gases.

Referring to fig. 1 and 12, it can be understood that the driving mechanism includes a driving motor 400 and a driving shaft 300, the driving motor 400 is disposed below the compression mechanism 200, a support member 500 coupled to the casing 100 is disposed below the driving motor 400, the support member 500 functions to absorb and reduce vibration of the driving mechanism and the compression mechanism 200,

the supporting member 500 may be an elastic member, such as a spring or an elastic airbag, and the supporting member 500 may also be a damper or other structures that can perform buffering and supporting.

The base 600 is connected to the bottom of the casing 100, and the compressor is fixedly installed through the base 600, so that the installation method is simple and convenient.

An embodiment of the second aspect of the present invention, as shown in fig. 1 to 20, provides a heat exchange system, which includes a first condenser 710, a second condenser 720, a throttling device, an evaporator 810 and a compressor in the above embodiments, the first condenser 710, the throttling device, the evaporator 810 and the compressor are connected to form a first heat exchange loop, the first condenser 710 is connected to the first exhaust portion 110; the second condenser 720, the throttling device, the evaporator 810 and the compressor are connected to form a second heat exchange circuit, and the second condenser 720 is connected to the second exhaust part 120. The heat exchange system can adopt the compressors of all the above embodiments, so that at least the advantages brought by the above embodiments are achieved, and the detailed description is omitted.

According to the system pressure of the two heat exchange circuits, the opening pressure of the exhaust valve 2314 corresponding to the first cavity 2311 and the opening pressure of the exhaust valve 2314 corresponding to the second cavity 2312 are determined, and the exhaust pressure of the first exhaust channel and the exhaust pressure of the second exhaust channel are different. The heat exchange system may be operated in a variety of ways, typically with the first discharge passage discharging a first compressed gas at a different pressure than the second discharge passage discharging a second compressed gas.

As shown in fig. 18, in the heating process, wind firstly passes through the second condenser 720 with a low condensation temperature and then enters the first condenser 710 with a high condensation temperature to heat the wind in stages, so that the energy gradient is utilized to improve the heat exchange performance.

Fig. 18 also illustrates the oil separator, the first exhaust part 110 and the second exhaust part 120 are respectively connected to gas inlets of the first oil separator 770 and the second oil separator 780, gas outlets of the first oil separator 770 and the second oil separator 780 are respectively connected to the first condenser 710 and the second condenser 720, and a liquid outlet of the oil separator is connected to the oil return part 140, so as to realize the recycling of the lubricating oil.

Referring to fig. 19 and 20, it can be understood that the evaporators are divided into a first evaporator 750 and a second evaporator 760, the throttling means are divided into a first throttling means 730 and a second throttling means 740, the first heat exchange circuit includes a first condenser 710, the first throttling means 730, the first evaporator 750, and a compressor connected to form a circulation circuit, and the second heat exchange circuit includes a second condenser 720, the second throttling means 740, the second evaporator 760, and a compressor connected to form a circulation circuit.

In fig. 19 and 20, the first heat exchange circuit further includes a first four-way valve 790 provided at a gas outlet of the first oil separator 770, and the second heat exchange circuit further includes a second four-way valve 800 provided at a gas outlet of the second oil separator 780. Referring to fig. 20, in the heating process, the refrigerant releases heat through the first condenser 710 and the second condenser 720, then passes through the first throttling device 730 and the second throttling device 740 to become low-pressure liquid, and then enters the first evaporator 750 and the second evaporator 760 respectively to absorb heat to become low-pressure refrigerant gas, wherein the evaporation temperatures of the first evaporator 750 and the second evaporator 760 may be the same or different, and wind enters from a low evaporation temperature and then enters into a high evaporation temperature to absorb heat in a grading manner, so as to perform energy gradient utilization, thereby improving the performance, in this example, the first evaporator 750 is at a high evaporation temperature, and the second evaporator 760 is at a low evaporation temperature.

Referring to fig. 19, in the refrigeration process, the refrigerant releases heat and absorbs heat, and also by using the dual cycle system, the wind enters the second evaporator 760 with a low evaporation temperature and then enters the first evaporator 750 with a high evaporation temperature for fractional heat exchange, so that the energy is utilized in a stepped manner, thereby improving the performance.

Embodiments of the third aspect of the present invention, as shown in fig. 1 to 20, provide an electrical apparatus, including the compressor in the above embodiments, or, including the heat exchange system in the above embodiments. The electrical equipment can adopt the compressor or the heat exchange system in the above embodiments, so that at least the advantages brought by the above embodiments are achieved, and the details are not repeated herein.

The electrical equipment can be heat exchange equipment such as a refrigerator, an ice chest, an air conditioner and the like, and the electrical equipment can also be a dryer, a washing machine, a heat pump water heater or a heat pump dish washing machine and the like. Of course, the electrical device may also be other devices that employ a heat exchange system, which is not listed here.

The above embodiments are merely illustrative, and not restrictive, of the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of the technical solutions should be covered by the scope of the claims of the present invention.

Claims

1. A compressor, comprising:

a housing provided with a first exhaust portion and a second exhaust portion;

2. The compressor of claim 1, including a drive shaft, the rotatable drive shaft for driving the first and second pistons away from or toward the drive shaft; the driving shaft is connected with the first piston through a first connecting rod, two ends of the first connecting rod are respectively and rotatably connected with the driving shaft and the first piston, and the driving shaft is used for driving the first connecting rod to eccentrically rotate so that the first connecting rod drives the first piston to reciprocate;

3. The compressor of claim 2, wherein the first piston and the second piston are symmetrically disposed on both sides of the driving shaft, and a center of the first piston and a center of the second piston and a center line of the first connecting rod and a center line of the second connecting rod are on the same plane.

4. The compressor of claim 2, wherein the first connecting rod and the second connecting rod are identical in structure, the first connecting rod including a rod body portion and a first projection portion projecting from the rod body portion in an axial direction of the first connecting rod with respect to a rotational axis of the first piston, the first projection portion being connected to the first piston and projecting in a direction toward the second connecting rod;

5. The compressor of claim 4, wherein the first link further includes a second boss projecting opposite the first boss relative to the rod body, the second boss being connected to the drive shaft.

6. The compressor of claim 5, wherein the first and second bosses each include an inclined portion extending obliquely along the rod portion in a direction away from the rod portion.

7. The compressor of claim 3, wherein the first connecting rod comprises a first shaft connecting part, a second shaft connecting part and a first piston connecting part connecting the first shaft connecting part and the second shaft connecting part, the first piston connecting part is connected to the first piston, the first shaft connecting part and the second shaft connecting part are both connected to the driving shaft, and a mounting groove is arranged between the first shaft connecting part and the second shaft connecting part;

8. The compressor according to any one of claims 2 to 7, wherein the driving shaft comprises a first connecting part and a second connecting part, an eccentric first roller is fixedly sleeved on the outer side of the first connecting part, and the outer side of the first roller is rotatably sleeved on the first connecting rod; the outer side of the second connecting part is fixedly sleeved with an eccentric second roller, and the outer side of the second roller is rotatably sleeved with the second connecting rod.

9. The compressor according to any one of claims 2 to 7, wherein a first passage, a second passage and a third passage are provided on the drive shaft, the housing defines a communication cavity for containing a lubricating fluid, the first passage communicates with the communication cavity, the first passage extends in an axial direction of the drive shaft and is eccentrically disposed in the drive shaft, the second passage extends around the drive shaft and both ends of the second passage communicate with the first passage and the third passage, respectively, and the third passage includes a communicating portion extending in the axial direction of the drive shaft to an end portion of the drive shaft and a lubricating portion extending in a radial direction of the drive shaft to a side wall of the drive shaft.

10. The compressor according to any one of claims 1 to 7, wherein an air intake is provided on the housing, the housing defining a communication chamber adapted to communicate with the first chamber and the second chamber;

11. The compressor of claim 10, wherein the first discharge portion and the second discharge portion are both connected to the cylinder member in contact therewith and are symmetrically disposed at both sides of the cylinder member.

12. The compressor of claim 10, wherein the cylinder block defines a first intake chamber, a second intake chamber, a first discharge chamber, and a second discharge chamber,

13. A heat exchange system comprising a first condenser, a second condenser, a throttling device, an evaporator and a compressor according to any one of claims 1 to 12, the first condenser, the throttling device, the evaporator and the compressor being connected to form a first heat exchange circuit, the first condenser being connected to the first exhaust; the second condenser, the throttling device, the evaporator and the compressor are connected to form a second heat exchange loop, and the second condenser is connected with the second exhaust part.

14. Electrical apparatus, characterized in that it comprises a compressor according to any one of claims 1 to 12, or a heat exchange system according to claim 13.