CN213016794U - Compressor - Google Patents

Abstract

The utility model discloses a compressor, including first compression subassembly, second compression subassembly and reservoir, the upper end of reservoir is provided with the total air inlet in the inside stock solution chamber of intercommunication, the air inlet of second compression subassembly through the pipeline intercommunication extremely in the stock solution chamber and pipeline upper end opening is higher than the setting at the bottom of the chamber, the gas vent and the total gas vent intercommunication of first compression subassembly, the gas vent of second compression subassembly with the air inlet of first compression subassembly passes through the exhaust passage intercommunication, exhaust passage wears to establish the reservoir sets up, just the exhaust passage inner chamber can with the heat transfer is realized to the inner chamber of reservoir. When exhaust passage was through the reservoir, heated the gas in the reservoir, and then made the whole temperature difference of importing and exporting of compressor reduce, was favorable to protecting each part of compressor, simultaneously, was favorable to reducing the gaseous temperature of first compression assembly exhaust, further protected the compressor, reduced the energy consumption simultaneously effectively.

Description

Compressor

Technical Field

The utility model relates to a compression technology field, more specifically say, relate to a compressor.

Background

In the refrigeration industry, two-stage compression technology is mainly aimed at the problems caused by the pressure ratio increase after the evaporation temperature is too low or the condensation temperature is too high. In recent years, a two-stage rotary compressor is one of the options of a heat pump air conditioning system for extreme temperatures, for example, a heat pump water heater adopts two-stage compression for obtaining high-temperature hot water.

Based on the performance of two-stage compression and single-stage compression under different operating conditions, in order to optimize the annual operating energy efficiency of the whole machine, mode switching according to different system requirements is a development trend of a two-stage compression technology. The whole machine temperature difference is large when the two-stage mode of the existing mode switchable two-stage compressor is in the two-stage mode, and the difference of the suction states of the two compression assemblies is large when the two-stage mode is in the single-stage mode, so that the running stability of the compressor is poor, the reliability is low, and the service life of the compressor is influenced.

In summary, how to effectively prolong the service life of the existing compressor is a problem that needs to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a compressor, which can effectively prolong the service life of the compressor.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a compressor, includes first compression subassembly, second compression subassembly and reservoir, the upper end of reservoir is provided with the intercommunication the total air inlet in the inside stock solution chamber of reservoir, the air inlet of second compression subassembly through the pipeline intercommunication extremely in the stock solution chamber and pipeline upper end opening be higher than at the bottom of the chamber in stock solution chamber, the gas vent and the total gas vent intercommunication of first compression subassembly, the gas vent of second compression subassembly with the air inlet of first compression subassembly passes through the exhaust passage intercommunication, exhaust passage wears to establish the reservoir setting, just exhaust passage's inner chamber can with the heat transfer is realized to the inner chamber of reservoir.

In the compressor, when in use, at the moment, the first compression assembly and the second compression assembly are both started, then the air inlet of the second compression assembly is sucked into a negative pressure state, so that the air in the liquid accumulator enters the air inlet of the second compression assembly through a pipeline, the air in the liquid accumulator can be replenished through the total air inlet, the second compression assembly compresses the air and then discharges the air, the temperature and the air pressure of the discharged air are both increased, then the discharged air enters the air inlet of the first compression assembly through the exhaust channel, then the air is further compressed and heated through the first compression assembly, meanwhile, the air in the liquid accumulator is heated when the exhaust channel passes through the liquid accumulator, so that the air entering the first compression assembly is cooled, the temperature of the air entering the second compression assembly is heated, the temperature difference of the whole inlet and outlet of the compressor is reduced, and the protection of each component of the compressor is facilitated, meanwhile, the temperature of the gas discharged by the first compression assembly is reduced, the compressor is further protected, and meanwhile, the energy consumption is effectively reduced. In conclusion, the compressor can effectively prolong the service life of the conventional compressor.

Preferably, the device further comprises a three-way joint, a valve used for sealing a first interface of the three-way joint, and an elastic device used for pushing the valve to move, the exhaust port of the second compression assembly is communicated with the main exhaust port through a first switch valve and is communicated with the exhaust channel through a second switch valve, the three-way joint is connected in series on the exhaust channel so that a second interface of the three-way joint is communicated with the exhaust port of the second compression assembly through the second switch valve, the air inlet of the first compression assembly is communicated with a third interface of the three-way joint, the first interface is communicated into the liquid storage cavity through a pipeline, an opening at the upper end of the pipeline is higher than the cavity bottom, the valve is opened and closed through a differential pressure force opposite to the driving force of the elastic device formed by opening and closing of the second switch valve, and the valve is closed when the second switch valve is opened, and opens the second on-off valve when the valve is closed.

Preferably, the exhaust pipe is an exhaust pipe of the exhaust channel, the three-way joint is located at the lower end of the liquid storage device and located on the outer side of the liquid storage device, the exhaust pipe penetrates into the liquid storage device along the vertical direction, and two ends of the exhaust pipe are communicated with the second switch valve and the second interface respectively.

Preferably, the first interface is connected with a first air inlet pipe extending into the liquid storage cavity, an air inlet of the second compression assembly is connected with a second air inlet pipe extending into the liquid storage cavity, and an air inlet pipe opening of the first air inlet pipe and an air inlet pipe opening of the second air inlet pipe are arranged at the same height.

Preferably, including first connecting pipe and second connecting pipe, the pipeline inner chamber of first connecting pipe and the pipeline inner chamber of second connecting pipe is exhaust passageway, three way connection is located the stock solution intracavity of reservoir, first connecting pipe is followed the top of reservoir penetrates extremely in the reservoir and both ends respectively with the second interface with the second ooff valve intercommunication, the second connecting pipe is followed the bottom of reservoir penetrates extremely in the reservoir and both ends respectively with the third interface with the air inlet intercommunication of first compression subassembly.

Preferably, the first interface is connected with a first air inlet pipe communicated to the liquid storage cavity, an air inlet of the second compression assembly is connected with a second air inlet pipe extending into the liquid storage cavity, and a pipe orifice of the first air inlet pipe and a pipe orifice of the second air inlet pipe are arranged at the same height.

Preferably, the tee joint is positioned at the upper part of the liquid storage cavity.

Preferably, the driving force of the elastic device is used for driving the valve to close, and when the second switch valve is closed, the pressure difference formed by the air pressure of the air from the main air inlet and the air pressure in the three-way joint can overcome the elastic deformation force of the elastic device so as to push the valve to open.

Preferably, the valve is located in the first interface, and one side of the valve faces the first interface inlet, and the other side of the valve is connected with the elastic device, the elastic device is a compression spring, and two ends of the elastic device respectively abut against the valve and the inner cavity wall of the three-way joint.

Preferably, the valve with three way connection inner chamber sliding fit, three way connection one end is provided with has first closed chamber, just first closed intracavity portion is provided with the resilient means, the three way connection other end has the second and seals the chamber, just the second seal the chamber with the second interface passes through the capillary intercommunication, in order to promote when the second ooff valve is opened the valve slides in order to close first interface just makes resilient means compressive deformation, when the second ooff valve is closed compression spring promotes the valve reverse slip is in order to open first interface.

Preferably, the three-way joint further comprises: the middle part of the middle transverse cavity part is provided with the first interface close to the second closed cavity, the second interface close to the first closed cavity, and the third interface is arranged between the first interface and the second interface; the valve block is arranged at the first closed cavity and used for plugging the second interface, the valve is arranged at the second closed cavity, the valve block is connected with the valve through a connecting rod, the elastic device is abutted against one side, far away from the valve, of the valve block, and the distance between the valve and the valve block is larger than the distance between the first interface and the second interface.

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 view of a two-stage compression assembly of a medium back pressure compressor according to an embodiment of the present invention when connected in series;

fig. 2 is a schematic structural diagram of a two-stage compression assembly of a medium back pressure compressor according to an embodiment of the present invention when connected in parallel;

fig. 3 is a schematic structural view of a two-stage compression assembly of a high back pressure compressor according to an embodiment of the present invention when connected in series;

fig. 4 is a schematic structural diagram of a high back pressure compressor according to an embodiment of the present invention when two stages of compression elements are connected in parallel;

fig. 5 is a schematic structural diagram of another three-way joint according to an embodiment of the present invention when two stages of compression assemblies are connected in series;

fig. 6 is a schematic structural diagram of another three-way joint according to an embodiment of the present invention when two stages of compression assemblies are connected in parallel;

fig. 7 is a schematic structural view of a compressor when another three-way joint provided by the embodiment of the present invention is located outside a liquid storage cavity.

The drawings are numbered as follows:

the device comprises a shell 1, a motor 2, an eccentric shaft 3, a first compression assembly 4, a second compression assembly 5, an elastic device 6, a third interface 7, a liquid storage device 8, a three-way joint 9, a first interface 10, a second interface 11, a main air inlet 12, a second switch valve 13, a first switch valve 14, a main air outlet 15, a liquid storage cavity 16, a first connecting pipe 17, a second connecting pipe 18, a first air inlet pipe 19, a second air inlet pipe 20, an air outlet pipe 21, a valve 91, a capillary tube 92, a valve block 93, a first closed cavity 94 and a second closed cavity 95.

Detailed Description

The embodiment of the utility model discloses compressor to solve present compressor life not long problem effectively.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 7, fig. 1 is a schematic structural view illustrating a two-stage compression element of a middle back pressure compressor according to an embodiment of the present invention connected in series; fig. 2 is a schematic structural diagram of a two-stage compression assembly of a medium back pressure compressor according to an embodiment of the present invention when connected in parallel; fig. 3 is a schematic structural view of a two-stage compression assembly of a high back pressure compressor according to an embodiment of the present invention when connected in series; fig. 4 is a schematic structural diagram of a high back pressure compressor according to an embodiment of the present invention when two stages of compression elements are connected in parallel; fig. 5 is a schematic structural diagram of another three-way joint according to an embodiment of the present invention when two stages of compression assemblies are connected in series; fig. 6 is a schematic structural diagram of another three-way joint according to an embodiment of the present invention when two stages of compression assemblies are connected in parallel; fig. 7 is a schematic structural view of a compressor when another three-way joint provided by the embodiment of the present invention is located outside a liquid storage cavity.

In a specific embodiment, the present embodiment provides a compressor, which may be a two-stage compressor, or a two-stage compression type rotary compressor. Specifically, the compressor may include a first compression assembly 4, a second compression assembly 5, and an accumulator 8.

The first compression assembly 4 and the second compression assembly 5 are compression assemblies, and the compression assemblies are rotated by the compression members to compress the intake air of the intake port and then discharge the compressed intake air from the exhaust port. The first compressing assembly 4 and the second compressing assembly 5 may be driven by one motor 2, that is, the compressing element of the first compressing assembly 4 and the compressing element of the second compressing assembly 5 may be connected with the same motor 2 through the eccentric shaft 3 to transmit power. Of course, the first compressing unit 4 and the second compressing unit 5 may be driven by one motor respectively. In particular, the driving forms of the two compressing assemblies can be set according to requirements.

Wherein the reservoir 8 is designed to avoid that the gas entering the total inlet 12 contains a large amount of liquid droplets, which in turn affects the use of the compression assembly. Wherein the upper end of reservoir 8 is provided with the total gas inlet 12 that communicates its inside stock solution chamber 16, promptly through total gas inlet 12 with gaseous leading-in to stock solution chamber 16, in stock solution chamber 16, wherein the liquid pearl in the gas can appear subsiding. The reservoir 8 may be a sealed canister structure, the specific shape and size of which may be set as desired.

Wherein the second compression assembly 5 and the first compression assembly 4 can be implemented in series, wherein the second compression assembly 5 acts as a first stage compression assembly and the first compression assembly 4 acts as a second stage compression assembly. Correspondingly, the exhaust port of the first compression assembly 4 is communicated with the total exhaust port 15, and the exhaust port of the second compression assembly 5 is communicated with the intake port of the first compression assembly 4 through an exhaust passage.

And the air inlet of the second compression component 5 is communicated to the liquid storage cavity 16 through a pipeline, and the upper end of the pipeline is opened and arranged higher than the cavity bottom of the liquid storage cavity 16. Wherein the upper end of the pipeline is opened, so that the gas in the liquid storage cavity 16 can be introduced into the pipeline through the upper end opening, and then introduced into the gas inlet of the second compression assembly 5 through the pipeline. And the upper end opening of the pipeline is arranged higher than the bottom of the liquid storage cavity 16, so that liquid beads in the gas entering the liquid storage cavity 16 from the main gas inlet 12 cannot enter the upper end opening of the pipeline after falling to the bottom of the liquid storage cavity 16, and the upper end opening of the pipeline is preferably positioned at the upper part of the liquid storage cavity 16 in order to ensure the liquid storage capacity of the liquid storage cavity 16.

Wherein the reservoir 8 setting is worn to establish by exhaust passage to make the exhaust passage inner chamber can realize the heat transfer with the inner chamber of reservoir 8, in so that the interior high hot gas of exhaust passage can be with heat transfer to stock solution chamber 16, and then heat the gas in the stock solution chamber 16. It should be noted that, in order to better make the intake air temperature of the second compression assembly 5 higher, at least the portion of the pipe communicating with the second compression assembly 5 located in the accumulator 8 may have a heat exchange capability, so as to improve the heat exchange efficiency in the passage. It should be noted that, the exhaust channel can exchange heat for the gas in the liquid storage chamber 16, and at least the portion of the channel wall having the exhaust channel, which is close to the inside of the liquid storage chamber 16, is a heat exchange wall, which can realize heat conduction.

In the compressor, when in use, at this time, the first compression component 4 and the second compression component 5 are both started, then the air inlet of the second compression component 5 is pumped into a negative pressure state, so that the air in the liquid reservoir 8 enters the air inlet of the second compression component 5 through a pipeline, the air in the liquid reservoir 8 can be replenished through the total air inlet 12, the second compression component 5 compresses the air and then discharges the air, the temperature and the air pressure of the discharged air are both raised (medium temperature), then the air enters the air inlet of the first compression component 4 through the exhaust channel, then the air is further compressed and heated (high temperature) through the first compression component 4, meanwhile, when the exhaust channel passes through the liquid reservoir 8, the air in the liquid reservoir 8 is heated, the air in the exhaust channel is cooled after exchanging heat with the air in the liquid reservoir 8, therefore, the air entering the first compression component 4 through the exhaust channel is cooled, and the gas that makes in the reservoir 8 enters into in the second compression assembly 5 intensifies, and then makes the whole exit temperature difference of compressor reduce, is favorable to protecting each part of compressor, simultaneously, is favorable to reducing the temperature of first compression assembly 4 discharge gas, further protects the compressor, reduces the energy consumption simultaneously effectively. In conclusion, the compressor can effectively prolong the service life of the conventional compressor.

In order to better fulfill the function of the compressor, a control assembly is generally provided, wherein the control assembly, through a control component, implements switching between parallel connection and series connection between the first compression assembly 4 and the second compression assembly 5. In particular, the control assembly comprises a three-way joint 9, a valve 91 and elastic means 6. The three-way joint 9 is connected in series to the exhaust passage, that is, the three-way joint 9 may be connected between the exhaust passage and the air inlet of the first compression assembly 4, may be connected between the exhaust passage and the air outlet of the second compression assembly 5, or may be connected in series to the middle of the exhaust passage.

The three-way joint 9 has three communicated interfaces, namely a first interface 10, a second interface 11 and a third interface 7. Wherein the first interface 10 is communicated to the liquid storage cavity 16 of the liquid storage device 8 through a pipeline, and the opening at the upper end of the pipeline is higher than the cavity bottom of the liquid storage cavity 16, so as to be communicated with the main air inlet 12, so as to obtain air inlet from the main air inlet 12, and only the air inlet needs to be obtained from the main air inlet 12, and one-to-one connection is not required. Wherein, the pipeline upper end opening is higher than the setting of being higher than the chamber bottom of stock solution chamber 16, can avoid the liquid in the stock solution chamber 16 to enter into in the pipeline upper end opening.

Wherein the second port 11 communicates with the discharge port of the second compression assembly 5 through the second on-off valve 13 to take the discharge gas from the discharge port of the second compression assembly 5, wherein the third port 7 communicates with the intake port of the first compression assembly 4 such that the intake port of the first compression assembly 4, through the three-way joint 9, takes the gas from the main intake port 12 from the first port 10 when in parallel and takes the gas from the discharge port of the second compression assembly 5 from the second port 11 when in series.

The exhaust port of the second compression assembly 5 is communicated with the main exhaust port 15 through the first switch valve 14, so that when the two are connected in parallel, the first switch valve 14 is in an open state, and the second switch valve 13 is in a closed state, so that the exhaust gas of the second compression assembly 5 is directly exhausted to the main exhaust port 15; in series, the first on-off valve 14 is in a closed state and the second on-off valve 13 is in an open state, so that the discharge gas of the second compression assembly 5 is no longer discharged directly to the total discharge port 15, but is discharged to the inlet port of the first compression assembly 4 through the three-way joint 9. It should be noted that, the first switch valve 14 and the second switch valve 13 may be linkage valves, so that when any one of them is switched from the open state to the closed state, the other one is correspondingly switched from the closed state to the open state through a linkage system, and the specific first switch valve 14 and the specific second switch valve 13 may both be electromagnetic valves, and the linkage therebetween is realized through an electric system, and of course, both the two switch valves may also be manual valves.

Wherein the valve 91 is used to close or open the first port 10, namely: when the valve 91 is opened, the first port 10 is in a state of being communicated with the third port 7, so that the gas of the main gas inlet 12 can be introduced into the gas inlet of the first compression assembly 4; when the valve 91 is closed, the first port 10 is closed and no longer communicates with the third port 7.

The elastic device 6 is used for pushing the valve 91 to move, that is, the elastic device 6 forms a driving force through elastic deformation, and then pushes the valve 91 to move towards an opening or closing direction, so as to close the first connector 10 or open the first connector. When the external force overcomes the elastic deformation force of the elastic device 6, the elastic device 6 is continuously elastically deformed, and the valve 91 is further moved in the other opening or closing direction, so that the first port 10 is closed or opened. Wherein the elastic means generally compress the spring, but of course also extend the spring, or other elastic bodies.

Specifically, the valve 91 is opened and closed by a pressure difference formed by opening and closing the second on-off valve 13, that is, a pressure difference formed by opening the second on-off valve 13 is formed to push the valve 91 to close, or a pressure difference formed by closing the second on-off valve 13 is formed to push the valve 91 to open, so that the first port 10 is communicated with the third port 7.

And the differential pressure force formed by the opening and closing of the second on-off valve 13 is opposite to the driving force of the elastic device 6, and the driving force of the elastic device 6 and the differential pressure force formed by the opening and closing of the second on-off valve 13 are matched with each other, so that the valve 91 is closed when the second on-off valve 13 is opened, and the valve 91 is opened when the second on-off valve 13 is closed.

Specifically, when the second on-off valve 13 forms a differential pressure force for driving the valve 91 to close due to opening, the driving force of the elastic device 6 is used for driving the valve 91 to open, and the differential pressure force formed at this time can overcome the elastic deformation force of the elastic device 6; while the second opening/closing valve 13 forms a differential pressure force for driving the valve 91 to open when closed, the driving force of the elastic means 6 is used for driving the valve 91 to close, and the differential pressure force formed at this time can overcome the elastic deformation force.

When the parallel connection is needed, the first switch valve 14 is operated to open to close the second switch valve 13, at the same time, the valve 91 is opened under the cooperation of the pressure difference force formed by closing the second switch valve 13 and the driving force of the elastic device 6, at the same time, the first compression assembly 4 is fed from the main air inlet 12 through the three-way joint 9, and the parallel connection of the first compression assembly 4 and the second compression assembly 5 is further achieved. When the series connection is needed, the second switch valve 13 is operated to open, so that the first switch valve 14 is closed, at this time, under the matching of the pressure difference formed by opening the second switch valve 13 and the driving force of the elastic device 6, the valve 91 is closed, at this time, the air inlet of the first compression assembly 4 does not intake air from the main air inlet 12, but the air inlet of the first compression assembly 5 inputs air from the air outlet, and the series connection is further achieved. In the compressor, the pressure difference change formed by the opening and closing of the second switch valve 13 and the deformation force of the elastic device 6 are utilized, so that the air inlet adjustment of the first compression assembly 4 can be automatically realized when the second switch valve 13 is operated to open and close, the valve control is not needed to be independently adopted, and the control is convenient, simple and rapid and firm.

As described above, there are various positional relationships among the exhaust passage and the three-way joint 9. And an exhaust pipe 21 serving as the exhaust channel may be further included, wherein the three-way joint 9 is located at the lower end of the reservoir 8 and outside the reservoir 8, and wherein the exhaust pipe 21 penetrates into the reservoir 8 in the vertical direction, and both ends of the exhaust pipe are respectively communicated with the second on-off valve 13 and the second port 11.

In which case the air inlets of the first mouthpiece 10 and the second compression assembly 5 may be provided with respective conduits to extend into the reservoir 16. Specifically, the first interface 10 can be connected with a first air inlet pipe 19 extending into the liquid storage cavity 16, the air inlet of the second compression assembly 5 is connected with a second air inlet pipe 20 extending into the liquid storage cavity 16, and the pipe orifice of the first air inlet pipe 19 and the pipe orifice of the second air inlet pipe 20 are arranged at the same height, so that the consistency of the air suction states of the two cylinders during single-stage compression is high, and stable operation and performance are facilitated.

It is also possible that the first port 10 and the inlet of the second compression assembly 5 may share a common conduit extending into the reservoir 16. Specifically, a total air inlet pipe extending into the liquid storage chamber 16 may be provided, and the total air inlet pipe, the first connector 10 and the air inlet of the second compressing assembly 5 are communicated with each other through a three-way structure.

Wherein three way connection 9 can also be located in the stock solution chamber 16 of reservoir, when three way connection 9 was located the stock solution chamber 16 of reservoir, because stock solution chamber 16 was the low pressure environment, so if three way connection 9 had when connecting untight clearance, gas in the three way connection 9 also can directly enter into stock solution chamber 16 in, and can not flow in the external big environment to play better sealed effect, can make three way connection 9 structure simpler simultaneously. Specifically, correspondingly, the compressor includes a first connecting pipe 17 and a second connecting pipe 18, wherein both the pipe of the first connecting pipe 17 and the pipe of the second connecting pipe 18 are the exhaust passage to form the exhaust passage in combination. The three-way joint 9 is located in a liquid storage cavity 16 of the liquid storage device, a first connecting pipe 17 penetrates into the liquid storage device 8 from the top of the liquid storage device 8, two ends of the first connecting pipe are communicated with the second interface 11 and the second switch valve 13 respectively, a second connecting pipe 18 penetrates into the liquid storage device 8 from the bottom of the liquid storage device 8, and two ends of the second connecting pipe are communicated with the third interface 7 and an air inlet of the first compression assembly 4 respectively.

At this time, the first interface 10 may be connected to a first air inlet pipe 19 communicated to the liquid storage cavity 16, the air inlet of the second compression assembly 5 may be connected to a second air inlet pipe 20 extending into the liquid storage cavity 16, and an air inlet pipe orifice of the first air inlet pipe 19 and an air inlet pipe orifice of the second air inlet pipe 20 are arranged at the same height. Further, in consideration of the reason that the joint is likely to leak water, it is preferable that the three-way joint 9 is located at an upper portion of the reservoir chamber 16.

The air inlets of the first interface 10 and the second compression component 5 are communicated to the liquid storage cavity 16 through pipelines, and the upper end opening of the pipeline is higher than the cavity bottom of the liquid storage cavity 16. Wherein the upper end opening of the duct is preferably arranged above and preferably offset from the total inlet 12. The upper end opening of the conduit is disposed above the chamber floor to prevent liquid in the reservoir chamber 16 from entering the conduit.

As described above, the closing of the valve 91 is realized by the pressure difference force generated by the opening and closing of the second on-off valve 13 and the deformation force of the elastic device 6, and a specific scheme can be adopted in which the driving force of the elastic device 6 is used for driving the valve 91 to close, and the air pressure difference generated by the closing of the second on-off valve 13 can push the valve 91 to open. Specifically, when the second on-off valve 13 is closed, the air inlet of the first compression assembly 4 is in a suction state, so that the air pressure in the three-way joint 9 is significantly reduced, and even in a negative pressure state, and at this time, the air coming from the main air inlet 12 and the air in the three-way joint 9 form an air pressure difference, and the air pressure difference can overcome the elastic deformation force of the elastic device 6, so as to push the valve 91 to open. And when the second on-off valve 13 is opened, the middle-high pressure gas discharged by the second compression assembly 5 enters the inner cavity of the three-way joint 9 through the opened second on-off valve 13, so that the air pressure in the three-way joint 9 rapidly rises to exceed the air pressure in the main air inlet 12, and at this time, the elastic device 6 can drive the valve 91 to close so as to close the first interface 10.

The setting mode of the valve 91 can meet the above requirements, specifically, the valve 91 can be located in the first interface 10, one side of the valve is connected with the elastic device 6 towards the inlet of the first interface 10, and the other side of the valve is connected with the elastic device 6, wherein the elastic device 6 is a compression spring, and two ends of the elastic device respectively abut against the inner cavity walls of the valve 91 and the three-way joint 9, so that the compression spring pushes the valve 91 to close the first interface 10. Specifically, the three-way joint 9 may include a cross rod cavity, wherein the first port 10 and the second port 11 are respectively communicated with the two end portions of the cross rod cavity, and the third port 7 is communicated with the middle portion of the cross rod cavity. And the valve 91 and the elastic device 6 are arranged in the cross rod cavity.

In another specific scheme, the valve 91 may be slidably engaged with the inner cavity of the three-way joint 9, wherein one end of the three-way joint 9 is provided with a first closed cavity 94, the elastic device 6 is disposed inside the first closed cavity 94, the other end of the three-way joint 9 is provided with a second closed cavity 95, the second closed cavity 95 is communicated with the second port 11 through a capillary 92, so that the gas pressure in the second port 11 is transmitted into the second closed cavity 95 through the capillary 92, when the second switch valve 13 is opened, the high-pressure gas in the second port 11 enters the second closed cavity 95 through the capillary 92, at this time, the gas pressure in the second closed cavity 95 is greater than the gas pressure in the first closed cavity 94, and the pressure difference therebetween can overcome the elastic deformation force of the elastic device 6, so that the push valve 91 slides to close the first port 10 and compress and deform the elastic device 6, when the second on-off valve 13 is closed, the air pressure in the second closed chamber 95 is reduced, so that the compression spring pushes the valve 91 to slide reversely to open the first port 10.

Further, the three-way joint 9 may include a middle transverse cavity portion, two end portions of the middle transverse cavity portion are respectively provided with a first closed cavity 94 and a second closed cavity 95, a middle portion of the middle transverse cavity portion is provided with the first connection port 10 near the second closed cavity 95, a second connection port 11 near the first closed cavity 94, and a third connection port 7 between the first connection port 10 and the second connection port 11, specifically, the first connection port 10 and the second connection port 11 may be both disposed on an upper side of the middle transverse cavity portion, and the third connection port 7 is disposed on a lower side of the middle transverse cavity portion. The valve further comprises a valve block 93 arranged at the first closed cavity 94 and used for blocking the second port 11, wherein the valve 91 is arranged at the second closed cavity 95, the valve block 93 is connected with the valve 91 through a connecting rod, and the elastic device 6 abuts against one side, far away from the valve 91, of the valve block 93. The distance between the valve 91 and the valve block 93 is greater than the distance between the first port 10 and the second port 11, so that when the valve 91 closes the first port 10, the valve block 93 is in the open position, and when the valve 91 moves to the open state, the corresponding valve block 93 is in the closed position, specifically, the middle transverse cavity part may be a cylindrical cavity, and the valve block 93 and the valve 91 are both cylindrical and are in sliding fit with the middle transverse cavity part.

For compressors in which the electric motor 2 is for better protection, the electric motor 2 is generally arranged inside the casing 1, and the discharge of the primary compression assembly or of the secondary compression assembly is discharged into the casing. Specifically, the discharge passage of the first compression assembly 4 or the discharge passage of the second compression assembly 5 may be provided through the housing 1. The exhaust passage is arranged through the shell 1, and there are two main ways, one is to use the shell cavity as a part of the exhaust passage, namely, the gas at the inlet end of the exhaust passage enters the shell 1 and then is exhausted from the exhaust port of the shell 1, an exhaust pipe can be arranged at the upper end of the shell 1, the pipe cavity of the exhaust pipe is used as a part of the exhaust passage, namely, when the exhaust passage of the first compression assembly 4 passes through the shell 1, the compressor is a high back pressure compressor, at this time, the exhaust pipe at the upper end is communicated with the main exhaust port 15, and when the exhaust passage of the second compression assembly 5 passes through the shell 1, the compressor is a medium back pressure compressor, at this time, the exhaust pipe is respectively communicated with the one end interface of the first switch valve 14 and the interface of the second switch valve.

When the two compressing units share one motor 2, the eccentric shaft 3 is connected to the main shaft of the motor 2, and the first compressing unit 4 and the second compressing unit 5 are both sleeved on the eccentric shaft 3, wherein the first compressing unit 4 is disposed between the second compressing unit 5 and the motor 2, and generally the first compressing unit 4 is disposed on the upper side of the second compressing unit 5. When the eccentric shaft 3 is connected in series, the first compression assembly 4 is used as a second-stage compression assembly and is arranged close to the motor 2, so that the load distribution of the eccentric shaft 3 is facilitated, and the service life of the eccentric shaft 3 is ensured.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A compressor, characterized by: including first compression subassembly (4), second compression subassembly (5) and reservoir (8), the upper end of reservoir (8) is provided with the intercommunication total air inlet (12) of the inside stock solution chamber (16) of reservoir (8), the air inlet of second compression subassembly (5) communicates through the pipeline to in stock solution chamber (16) and pipeline upper end opening are higher than at the bottom of the chamber of stock solution chamber (16), the gas vent and total gas vent (15) the intercommunication of first compression subassembly (4), the gas vent of second compression subassembly (5) with the air inlet of first compression subassembly (4) passes through the exhaust passage intercommunication, the exhaust passage wears to establish reservoir (8) set up, just the inner chamber of exhaust passage can with the heat transfer is realized to the inner chamber of reservoir (8).

2. The compressor according to claim 1, characterized in that it further comprises a three-way joint (9), a valve (91) for closing a first port (10) of the three-way joint (9), and elastic means (6) for pushing the valve (91) to move, the exhaust port of the second compression assembly (5) is communicated with the total exhaust port through a first switch valve (14) and is communicated with the exhaust passage through a second switch valve (13), the three-way joint (9) is connected in series on the exhaust passage so that a second port (11) of the three-way joint (9) is communicated with the exhaust port of the second compression assembly (5) through a second switch valve (13), the intake port of the first compression assembly (4) is communicated with a third port (7) of the three-way joint (9), the first port (10) is communicated into the reservoir through a pipeline, and the upper end of the pipeline is opened higher than the bottom of the reservoir, the valve (91) is opened and closed by a differential pressure force formed by opening and closing of the second on-off valve (13) and opposite to the driving force of the elastic device (6), and the valve (91) is closed when the second on-off valve (13) is opened and the valve (91) is opened when the second on-off valve (13) is closed.

3. The compressor according to claim 2, further comprising an exhaust pipe (21) whose pipeline is the exhaust passage, wherein the three-way joint (9) is located at the lower end of the liquid reservoir (8) and outside the liquid reservoir (8), the exhaust pipe (21) penetrates into the liquid reservoir (8) in the vertical direction, and the two ends are respectively communicated with the second on-off valve (13) and the second port (11).

4. The compressor as claimed in claim 2, wherein the first interface (10) is connected with a first air inlet pipe (19) extending into the liquid storage cavity (16), the air inlet of the second compression assembly (5) is connected with a second air inlet pipe (20) extending into the liquid storage cavity, and the air inlet pipe orifice of the first air inlet pipe (19) and the air inlet pipe orifice of the second air inlet pipe (20) are arranged at the same height.

5. The compressor according to claim 2, characterized by comprising a first connecting pipe (17) and a second connecting pipe (18), wherein the pipe inner cavity of the first connecting pipe (17) and the pipe inner cavity of the second connecting pipe (18) are both the exhaust channel, the three-way joint (9) is located in the liquid storage cavity of the liquid storage device, the first connecting pipe (17) penetrates into the liquid storage device (8) from the top of the liquid storage device (8) and both ends of the first connecting pipe are respectively communicated with the second port (11) and the second switch valve (13), the second connecting pipe (18) penetrates into the liquid storage device (8) from the bottom of the liquid storage device (8) and both ends of the second connecting pipe are respectively communicated with the third port (7) and the air inlet of the first compression assembly (4).

6. Compressor according to claim 5, characterized in that said three-way joint (9) is located in the upper portion of said reservoir (16).

7. The compressor according to any one of claims 2 to 6, wherein the driving force of the elastic means (6) is used for driving the valve (91) to close, and when the second on-off valve (13) is closed, the pressure difference formed by the gas pressure coming from the total gas inlet (12) and the gas pressure in the three-way joint (9) can overcome the elastic deformation force of the elastic means (6) to push the valve (91) to open.

8. The compressor according to claim 7, characterized in that said valve (91) is located in said first port (10), and one side of said valve is toward the inlet of said first port (10), and the other side of said valve is connected to said elastic means (6), said elastic means (6) is a compression spring, and both ends of said elastic means are respectively abutted against said valve (91) and the inner cavity wall of said three-way joint (9).

9. The compressor according to any one of claims 2 to 6, wherein the valve (91) is in sliding fit with an inner cavity of the three-way joint (9), a first closed cavity (94) is arranged at one end of the three-way joint (9), the elastic device (6) is arranged in the first closed cavity (94), a second closed cavity (95) is arranged at the other end of the three-way joint (9), the second closed cavity (95) is communicated with the second port (11) through a capillary tube (92), so that when the second on-off valve (13) is opened, the valve (91) is pushed to slide to close the first port (10) and the elastic device (6) is compressed and deformed, and when the second on-off valve (13) is closed, the valve (91) is pushed to slide reversely to open the first port (10).

10. Compressor according to claim 9, characterized in that said three-way joint (9) further comprises:

the two end parts of the middle transverse cavity part are respectively provided with the first closed cavity (94) and the second closed cavity (95), the middle part of the middle transverse cavity part is provided with the first interface (10) close to the second closed cavity (95), the second interface (11) close to the first closed cavity (94), and the third interface (7) is arranged between the first interface (10) and the second interface (11);

the valve block (93) is arranged at the first closed cavity (94) and used for blocking the second interface (11), the valve (91) is arranged at the second closed cavity (95), the valve block (93) is connected with the valve (91) through a connecting rod, the elastic device (6) abuts against one side, far away from the valve (91), of the valve block (93), and the distance between the valve (91) and the valve block (93) is larger than the distance between the first interface (10) and the second interface (11).

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