CN214092306U

CN214092306U - Enthalpy-increasing pressure pulsation attenuation device, scroll compressor and air conditioning system

Info

Publication number: CN214092306U
Application number: CN202023115469.XU
Authority: CN
Inventors: 于志强
Original assignee: Guangdong Meizhi Compressor Co Ltd
Current assignee: Guangdong Meizhi Compressor Co Ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-08-31
Anticipated expiration: 2030-12-22

Abstract

The application provides an enthalpy-increasing pressure pulsation attenuation device, a scroll compressor and an air conditioning system. Wherein, increase enthalpy pressure pulsation damping device includes: the enthalpy-increasing outer pipe is connected to one end, far away from the enthalpy-increasing spray holes, of the inner pipe of the static disc and is used for connecting an external refrigerant pipeline; the throttling element is arranged in a static disc inner pipe of the scroll compressor, a throttling hole is arranged in the throttling element, two ends of the throttling hole are respectively communicated with the enthalpy-increasing outer pipe and the static disc inner pipe, and at least part of the aperture of the throttling hole is smaller than the pipe diameter of the static disc inner pipe. According to the technical scheme, the pulsating transfer action of the air flow in the compression cavity of the scroll compressor can be effectively weakened, the attenuation of the air flow in the compression cavity to the backflow propagation process of the enthalpy-increasing outer pipe can be inhibited, the vibration of the enthalpy-increasing outer pipe and the throttle valve plate can be inhibited, the noise is reduced, the reliability of the scroll compressor is favorably improved, the backflow loss and the jet flow mixing loss of the air flow in the scroll compressor are weakened, and the energy efficiency is favorably improved.

Description

Enthalpy-increasing pressure pulsation attenuation device, scroll compressor and air conditioning system

Technical Field

The application relates to the technical field of compressors, in particular to an enthalpy-increasing pressure pulsation attenuation device, a scroll compressor and an air conditioning system.

Background

At present, a scroll compressor generally utilizes the periodic movement of a movable scroll relative to a fixed scroll, so that a compression cavity is directly and periodically communicated and closed with an enthalpy increasing channel, and air is supplied into the compression cavity through the enthalpy increasing channel to achieve an enthalpy increasing effect. However, in the scroll compressor, the enthalpy-increasing channel is periodically opened or closed, so that the process that refrigerant gas flows into the scroll compressor through the enthalpy-increasing channel is actually in a pulsating mode, when the air-supplementing enthalpy-increasing pressure is higher than the pressure in the compression cavity, enthalpy-increasing airflow is sprayed into the compression cavity, and when the air-supplementing enthalpy-increasing pressure is lower than the pressure in the compression cavity, the airflow in the compression cavity flows into the enthalpy-increasing pipe to form a backflow phenomenon. Above process makes tonifying qi and backward flow take place in turn, makes refrigerant gas form periodic pulsation, causes enthalpy-increasing pipeline and choke valve etc. easily and produces periodic excitation force, when low order excitation force frequency and enthalpy-increasing pipeline and choke valve block low order frequency are close, can arouse strong vibration to produce great noise, can lead to enthalpy-increasing pipeline and choke valve block fracture even, make scroll compressor's reliability descend, seriously influence scroll compressor's life.

SUMMERY OF THE UTILITY MODEL

According to an embodiment of the present application, it is intended to at least improve one of technical problems existing in the prior art or the related art.

To this end, it is an object of embodiments according to the present application to provide an enthalpy-increasing pressure pulsation damping device.

It is another object of an embodiment according to the present application to provide a scroll compressor.

It is a further object of embodiments according to the present application to provide an air conditioning system.

In order to achieve the above object, according to an embodiment of a first aspect of the present application, there is provided an enthalpy-increasing pressure pulsation reducing device for a scroll compressor having an enthalpy-increasing channel including a stationary disk inner tube and an enthalpy-increasing nozzle hole, the enthalpy-increasing pressure pulsation reducing device including: the enthalpy-increasing outer pipe is connected to one end, far away from the enthalpy-increasing spray holes, of the inner pipe of the static disc and is used for connecting an external refrigerant pipeline; the throttling element is arranged in a static disc inner pipe of the scroll compressor, a throttling hole is arranged in the throttling element, two ends of the throttling hole are respectively communicated with the enthalpy-increasing outer pipe and the static disc inner pipe, and at least part of the aperture of the throttling hole is smaller than the pipe diameter of the static disc inner pipe.

According to an embodiment of the first aspect of the present application, an enthalpy-increasing pressure pulsation damping device is used for a scroll compressor. The scroll compressor is provided with an enthalpy-increasing channel which comprises a static disc inner tube and enthalpy-increasing spray holes, wherein the static disc inner tube is arranged in a static disc, and the static disc inner tube can be communicated with a compression cavity of the scroll compressor through the enthalpy-increasing spray holes. The enthalpy-increasing pressure pulsation damping device comprises an enthalpy-increasing outer pipe and a throttling element. The throttling element is arranged in the inner pipe of the static disc, the enthalpy-increasing outer pipe is connected with one end of the inner pipe of the static disc far away from the enthalpy-increasing spray hole, the outer refrigerant pipe is used for being connected with an external refrigerant pipeline, the enthalpy-increasing inlet is formed, the gas refrigerant in the external refrigerant pipeline can flow into the compression cavity through the enthalpy-increasing channel in the enthalpy-increasing outer pipe and the static disc, the enthalpy-increasing effect is achieved through air supplying, the medium temperature in the compression cavity is favorably reduced, the volume efficiency is improved, the exhaust temperature of the scroll compressor can be greatly reduced, and the reliability of the scroll compressor is improved.

The throttling element in the scheme is provided with the through throttling hole, so that the enthalpy-increasing outer pipe is communicated with the static disc inner pipe, meanwhile, at least partial aperture of the throttling hole is smaller than the pipe diameter of the static disc inner pipe, flow resistance is generated through change of the cross section area, and then the strength of airflow in the compression cavity flowing back to the enthalpy-increasing outer pipe is attenuated, the transfer effect of airflow pulsation in the compression cavity to the enthalpy-increasing outer pipe is weakened through the throttling effect of the throttling hole, or the backflow airflow generates the radial inward speed to attenuate the transmission of airflow backflow in the compressor to the enthalpy-increasing outer pipe, and the pressure pulsation strength of the enthalpy-increasing outer pipe is weakened. When the scroll compressor is assembled in an air conditioning system, the pressure pulsation level of the enthalpy-increasing outer pipe can be effectively weakened, the vibration of the enthalpy-increasing pipe and the throttle valve plate is inhibited, the noise is reduced, the probability of breakage of the enthalpy-increasing pipe and the throttle valve plate is greatly reduced, and the reliability of the scroll compressor is improved. In addition, the mixing loss of the backflow and the jet flow can be reduced, and the energy efficiency is improved.

The orifice in this embodiment is not limited to a straight hole, an inclined hole, or a bent hole, and the diameter of the orifice may be constant or may be variable in the axial direction of the orifice.

In addition, the enthalpy-increasing pressure pulsation damping device in the above technical solution provided according to the embodiment of the present application may further have the following additional technical features:

in the technical scheme, the throttling element is arranged at one end, close to the enthalpy-increasing outer pipe, of the static disc inner pipe, and the outer side face of the throttling element is abutted to the inner side face of the static disc inner pipe.

In this technical scheme, through setting up the choke piece in the one end that is close to increasing the enthalpy outer tube to make the quiet dish inner tube be close to the part that increases the enthalpy orifice and can have sufficient space, in order when increasing enthalpy orifice and compression chamber and being in the closed condition, can hold sufficient air current in the quiet dish inner tube, thereby reduce the gas flow to increase the interior backward flow of enthalpy outer tube. Wherein, the lateral surface of orifice spare offsets with the medial surface of quiet dish inner tube to eliminate the clearance between orifice spare and the quiet dish inner tube, make orifice spare both ends only can communicate through the orifice, thereby strengthen the throttle effect, be favorable to reducing the air current of quiet dish inner tube and flow back in to increasing the enthalpy outer tube.

In the above aspect, the orifice includes: the inflow section is arranged at one end of the throttling element communicated with the enthalpy-increasing outer pipe; the throttling section is communicated with one end of the inflow section, which is far away from the enthalpy-increasing outer pipe; wherein the aperture of the inflow section is larger than the aperture of the throttling section.

In this solution, the throttle bore may comprise different bore sections, in particular the throttle bore comprises an inflow section and a throttle section. The inflow section is arranged at one end of the throttling piece communicated with the enthalpy-increasing outer pipe and is communicated with the throttling section. The aperture of the inflow section is larger than that of the throttling section, so that in the enthalpy-increasing air-supplying process, the inflow section plays a role in guiding air flow, the air flow is promoted to flow to the part, close to the enthalpy-increasing spray holes, of the inner pipe of the static disc through the throttling section, the air flow of forward air-supplying is increased, when the enthalpy-increasing spray holes are in a closed state, because the aperture of the throttling section is smaller than that of the inflow section, the air flow flowing back through the throttling hole is smaller than that of the forward air-supplying, the backflow of air to the enthalpy-increasing outer pipe is reduced by using the throttling effect, and the enthalpy-increasing effect of the scroll compressor is promoted.

In the technical scheme, the aperture of the inflow section is gradually reduced from one end close to the enthalpy-increasing outer pipe to one end close to the throttling section.

In the technical scheme, in the axial direction of the inflow section, the aperture of the inflow section is gradually reduced from one end close to the enthalpy-increasing outer pipe to one end close to the throttling section, namely, the whole inflow section is in a contracted shape, so that the guiding effect on the airflow is further enhanced. The shape of the inflow section is not limited to the tapered structure, but may be other structures, for example, the contour line of the inner side surface of the inflow section is an arc line, and gradually shrinks to the port of the throttle section.

In the above technical solution, the orifice further includes: the outflow section is arranged at one end, far away from the inflow section, of the throttling section and communicated with the throttling section, and the aperture of the outflow section is larger than that of the throttling section.

In the technical scheme, an outflow section is further arranged at one end, far away from the inflow section, of the throttling section in the throttling hole and is communicated with the throttling section. Wherein, the aperture through setting up the section of effluenting is greater than the aperture of throttle section to the increase area of covering of the air current of effluenting reduces the impact force of the air current of effluenting, is favorable to the flow stability of the air-supply enthalpy-increasing air current, also can improve the efficiency of air-supply enthalpy-increasing.

In the technical scheme, the outflow section is gradually increased from one end close to the throttling section to one end far away from the throttling section.

In this technical scheme, in the axial direction of the section of effluenting, through setting up by the one end that is close to the throttle section to the one end of keeping away from the throttle section, the aperture of the section of effluenting increases gradually to play the guide effect to the air current of effluenting, make the air current of effluenting flow in the quiet dish inner tube by the orifice gently relatively. It should be noted that the outflow section is not limited to a conical structure, but may be other expanding shape structures, for example, the contour line of the inner side surface of the outflow section is an arc line, and the inner side surface is gradually expanded outwards by the port of the throttling section.

In the technical scheme, the aperture of the throttle hole is gradually reduced from one end close to the enthalpy-increasing outer pipe to one end far away from the enthalpy-increasing outer pipe.

In this technical scheme, in the axial direction of orifice, the aperture of orifice reduces to the one end of keeping away from the enthalpy-increasing outer tube by the one end that is close to the enthalpy-increasing outer tube gradually, and the orifice is whole to be the shrink form promptly to increase the flow of positive tonifying qi air current, reduce the backward flow of air current, and then strengthen scroll compressor's enthalpy-increasing effect. The orifice is not limited to a tapered hole, and may have another constricted structure.

In the above technical solution, at least a part of the throttle holes are of a straight hole structure and extend in the axial direction of the inner pipe of the stationary disc.

In the technical scheme, at least part of the throttling holes are of a straight hole structure, namely, part or all of the throttling holes are arranged in the straight hole structure, so that when airflow flows in the straight hole structure, the flowing direction can be kept relatively stable, the blocking effect of the hole walls on the airflow can be reduced, and the pressure loss of the airflow in the flowing process is reduced. In addition, the straight hole structure is convenient to process, and is beneficial to reducing the processing cost.

In the technical scheme, at least part of the throttling holes are in inclined hole structures, and a first angle is formed between the central axis of each inclined hole structure and the central axis of the inner pipe of the static disc.

In the technical scheme, at least part of the throttling holes are in an inclined hole structure, namely, part or all of the throttling holes are in an inclined hole structure, so that when airflow flows in the inclined hole structure, the flowing direction is consistent with the axial direction of the inclined hole and is kept relatively stable, the blocking effect of the hole wall on the airflow can be reduced, and the pressure loss of the airflow in the flowing process is reduced. The central axis of the inclined hole and the central axis of the inner pipe of the static disc form a first angle, namely the central axis of the inclined hole is inclined relative to the central axis of the inner pipe of the static disc.

In the technical scheme, the area of the minimum cross section of the throttling hole is 10-70% of the cross section area of the enthalpy-increasing spraying hole; and/or the area of the minimum cross section of the orifice is 10% to 50% of the cross section area of the inner tube of the static disc; and/or the length of the orifice is 20% to 60% of the length of the inner tube of the static disc; and/or the length of the hole section corresponding to the minimum cross section of the orifice hole is 5% to 100% of the total length of the orifice hole.

In the technical scheme, the size of part of the throttling hole is specifically limited so as to promote the effect of air supplement and enthalpy increase and simultaneously reduce the backflow of the air flow in the inner pipe of the static disc to the enthalpy increase outer pipe. The area of the minimum cross section of the throttling hole is 10% -70% of the cross section of the enthalpy-increasing spraying hole, so that the cross section of the enthalpy-increasing spraying hole is larger than the minimum cross section of the throttling hole, the flow rate of the enthalpy-increasing spraying hole is larger than that of the throttling hole, airflow can quickly flow into the compression cavity through the enthalpy-increasing spraying hole after flowing into the inner pipe of the static disc through the throttling hole, and the backflow of the airflow in the inner pipe of the static disc to the enthalpy-increasing outer pipe is reduced. Wherein, in particular, the area of the minimum cross section of the orifice may be 30%, 40%, 50% of the cross section area of the enthalpy-increasing orifice.

By setting the minimum cross-sectional area of the orifice to be 10% to 50% of the cross-sectional area of the inner tube of the stationary disk, for example, 20%, 30% or 40%, the inner tube of the stationary disk has enough space to accommodate a sufficient amount of airflow when the enthalpy-increasing orifice is in a closed state, so as to reduce the backflow of the airflow to the enthalpy-increasing outer tube.

By setting the length of the throttle hole to be 20% to 60%, for example, 30%, 40%, 50% of the length of the inner tube of the static disc so as to maintain the appropriate length ratio of the inner tube of the static disc to the throttle hole, enough space is left for the inner tube of the static disc to accommodate the gas flow, and the back flow of the gas flow to the enthalpy-increasing outer tube is reduced.

The length of the hole section corresponding to the minimum cross section of the throttling hole is 5% -100% of the total length of the throttling hole, so that the hole section corresponding to the minimum cross section of the throttling hole has a certain length, the air flow is conveniently throttled, the throttled air flow can flow into the inner pipe of the static disc relatively stably, meanwhile, the throttling hole can have enough strength, and damage is prevented when the air flow pressure is too large.

In the above technical solution, the orifice is a unthreaded hole or a threaded hole.

In the technical scheme, the throttling hole can be a smooth hole, so that the processing is convenient, and the pressure loss in the air flow flowing process is reduced. Of course, the throttling hole can also be a threaded hole, a certain guiding effect can be achieved on the air flow, the air flow flows into the inner pipe of the static disc in a spiral mode, air flow diffusion is facilitated, meanwhile, the threaded hole is convenient to connect, for example, the throttling hole and the enthalpy-increasing outer pipe can be connected through threads, and sealing performance is improved.

Embodiments of a second aspect of the present application provide a scroll compressor comprising: a housing; the static disc is arranged in the shell, an enthalpy increasing channel is arranged in the static disc, and the enthalpy increasing channel comprises a static disc inner tube and at least one enthalpy increasing spray hole; the movable scroll is arranged in the shell, the movable scroll and the static scroll surround to form a compression cavity, and the movable scroll can rotate relative to the static scroll so as to lead the compression cavity to be communicated with the enthalpy-increasing spray holes; in the enthalpy-increasing pressure pulsation reducing device according to any one of the embodiments of the first aspect described above, the throttle member of the enthalpy-increasing pressure pulsation reducing device is provided in the inner tube of the stationary disk, and the enthalpy-increasing outer tube of the enthalpy-increasing pressure pulsation reducing device protrudes outward through the casing.

According to an embodiment of the second aspect of the present application, a scroll compressor comprises a housing, a stationary plate, a moving scroll and the enthalpy-increasing pressure pulsation damping device of any of the embodiments of the first aspect described above. The static disc and the movable scroll disc are correspondingly arranged in the shell, and a compression cavity is formed between the movable scroll disc and the static disc in a surrounding manner; an enthalpy-increasing channel comprising a static disc inner tube and enthalpy-increasing spray holes is arranged in the static disc, and the enthalpy-increasing spray holes are used for communicating the static disc inner tube with the compression cavity. When the scroll compressor works, the movable scroll plate rotates relative to the static plate, and the enthalpy-increasing spray holes are periodically opened or closed.

A throttling element in the enthalpy-increasing pressure pulsation attenuation device is arranged in a static disc inner pipe, and an enthalpy-increasing outer pipe is communicated with a throttling hole of the throttling element and penetrates through a shell to extend outwards so as to be connected with an external refrigerant pipeline. The external refrigerant flows into the inner pipe of the static disc through the enthalpy-increasing outer pipe and the throttling hole and then flows into the compression cavity when the enthalpy-increasing spray holes are communicated. Through the throttling action of the throttling hole, the air flow in the inner pipe of the static disc is reduced to return to the enthalpy-increasing outer pipe when the enthalpy-increasing spraying holes are closed, so that the vibration caused by the periodic pressure pulsation of the returned air flow is weakened, the reliability of the scroll compressor is improved, and the service life is prolonged. The scroll compressor of this scheme through the middling pressure cavity part with refrigerant gas introduces the compression chamber through increasing the enthalpy passageway, can effectively reduce the temperature of refrigerant in the compression chamber, improves the volume efficiency to reduce scroll compressor's exhaust temperature and heating capacity by a wide margin, can improve scroll compressor's reliability simultaneously.

In addition, the scroll compressor in this scheme also has the full beneficial effects of the enthalpy-increasing pressure pulsation damping device in any one of the embodiments of the first aspect described above, and details are not repeated here.

In addition, the scroll compressor in the above technical solution provided by the embodiment of the present application may further have the following additional technical features:

in the above technical solution, the scroll compressor further includes: the crankshaft is arranged below the movable scroll plate, is connected with the bottom of the movable scroll plate and is used for driving the movable scroll plate to move relative to the static plate; the main bracket is sleeved on the crankshaft and is connected with the movable scroll; and the slip ring structure is arranged between the movable scroll and the main bracket.

In this technical scheme, the scroll compressor still includes bent axle, main support and sliding ring structure, all locates in the casing. Specifically, the bent axle is located the below that moves the vortex dish, is connected through setting up the bent axle and the bottom that moves the vortex dish to utilize the bent axle to drive and move the vortex dish, and then realize increasing the periodic of enthalpy orifice and switch on or close. Through the cover on the bent axle be equipped with the main support to through the main support with move being connected between the vortex dish, fix moving the vortex dish. The sliding ring structure, such as a cross sliding ring, is arranged between the movable scroll and the main bracket to play a role of preventing autorotation.

In an embodiment according to a third aspect of the present application, there is provided an air conditioning system comprising: a condenser, an evaporator and a flash evaporator; the scroll compressor according to any one of the embodiments of the second aspect above, connected in circuit with the condenser, the evaporator and the flash evaporator by means of piping.

In this embodiment, the air conditioning system comprises a condenser, an evaporator, a flash evaporator and the scroll compressor of any of the embodiments of the second aspect described above. The condenser, the evaporator, the flash evaporator and the scroll compressor are connected through pipelines to form a loop, so that the air conditioning effect is realized through the heat exchange of a refrigerant.

In addition, the air conditioning system in the present scheme also has all the beneficial effects of the scroll compressor in any one of the embodiments of the second aspect, which are not described herein again.

In the technical scheme, the outlet of the flash evaporator is connected with the enthalpy-increasing outer pipe of the scroll compressor through a pipeline.

In the technical scheme, the outlet of the flash evaporator is connected with the enthalpy-increasing outer pipe of the scroll compressor through a pipeline, so that the refrigerant passing through the flash evaporator is supplied to the enthalpy-increasing pressure pulsation attenuation device of the scroll compressor and flows into a compression cavity of the scroll compressor, and the backflow of refrigerant gas is reduced through the throttling effect of the enthalpy-increasing pressure pulsation attenuation device.

The air conditioning system of the present embodiment may be arranged such that the refrigerant flowing out of the condenser or the evaporator is supplied into the scroll compressor.

Additional aspects and advantages of the embodiments of the application will be set forth in part in the description which follows or may be learned by practice of the application.

Drawings

The above and/or additional aspects and advantages of embodiments of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates a cross-sectional view of a scroll compressor according to one embodiment of the present application;

FIG. 2 illustrates a cross-sectional view of a portion of the structure of a scroll compressor according to one embodiment of the present application;

FIG. 3 illustrates a cross-sectional view of a scroll compressor according to one embodiment of the present application;

FIG. 4 illustrates a cross-sectional view of a stationary plate according to an embodiment of the present application;

FIG. 5 shows a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 6 illustrates a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 7 illustrates a cross-sectional view of a stationary disk according to an embodiment of the present application;

FIG. 8 illustrates a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 9 illustrates a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 10 illustrates a cross-sectional view of a stationary plate according to an embodiment of the present application;

FIG. 11 illustrates a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 12 illustrates a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 13 illustrates a cross-sectional view of a stationary plate according to an embodiment of the present application;

FIG. 14 illustrates a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 15 shows a cross-sectional view of a throttle according to an embodiment of the present application;

FIG. 16 illustrates a cross-sectional view of a scroll compressor according to one embodiment of the present application.

Wherein, the correspondence between the reference numbers and the names of the components in fig. 1 to 16 is as follows:

1 increases enthalpy pressure pulsation damping device, 11 increases enthalpy outer tube, 12 throttle spare, 121 orifice, 1211 inflow section, 1212 throttle section, 1213 outflow section, 2 scroll compressor, 21 casing, 22 quiet dish, 23 move the vortex dish, 24 increase enthalpy passageway, 241 quiet dish inner tube, 242 increase enthalpy orifice, 25 compression chamber, 261 bent axle, 262 main support, 263 slip ring structure.

Detailed Description

In order that the above objects, features and advantages of the embodiments according to the present application may be more clearly understood, embodiments according to the present application will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments according to the present application, however, embodiments according to the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

An enthalpy-increasing pressure pulsation damping device, a scroll compressor, and an air conditioning system according to some embodiments of the present application are described below with reference to fig. 1 to 16.

Example one

The present embodiment provides an enthalpy-increasing pressure pulsation damping device 1, as shown in fig. 1 and 2, which may be used with a scroll compressor 2 having an enthalpy-increasing passage 24.

An enthalpy-increasing channel 24 is arranged in the static disc 22 of the scroll compressor 2 and comprises a static disc inner tube 241 and enthalpy-increasing spray holes 242, and the static disc inner tube 241 can be communicated with the compression cavity 25 of the scroll compressor 2 through the enthalpy-increasing spray holes 242.

The enthalpy-increasing pressure pulsation damping device 1 includes an enthalpy-increasing outer tube 11 and a throttle member 12. The throttling element 12 is communicated with the enthalpy-increasing outer pipe 11; the throttling element 12 is arranged in the static disc inner pipe 241, the throttling element 12 is provided with a through throttling hole 121, and two ends of the throttling hole 121 are respectively communicated with the enthalpy-increasing outer pipe 11 and the static disc inner pipe 241; the enthalpy-increasing outer pipe 11 is connected to one end of the inner pipe 241 of the stationary disc, which is far away from the enthalpy-increasing nozzle holes 242, and is used for connecting an external refrigerant pipeline. When the scroll compressor 2 is in operation, the enthalpy-increasing outer pipe 11 is used as an enthalpy-increasing inlet, and a gas refrigerant in an external refrigerant pipeline flows into the compression cavity 25 through the enthalpy-increasing channel 24 in the enthalpy-increasing outer pipe 11 and the static disc 22 so as to realize the effect of air supplement and enthalpy increase, effectively reduce the medium temperature in the compression cavity 25, improve the volume efficiency, greatly reduce the exhaust temperature of the scroll compressor 2 and improve the reliability of the scroll compressor 2. The orifice 121 is not limited to a straight hole, an inclined hole, or a bent hole, and the hole diameter of the orifice 121 may be constant or may vary in the axial direction of the orifice 121.

Wherein, at least part of the aperture of the throttle hole 121 is smaller than the pipe diameter of the inner pipe 241 of the static disc, so as to generate flow resistance through the change of the cross-sectional area of the throttle hole 121, and reduce the gas flow back to the enthalpy-increasing outer pipe 11 by using the throttling effect.

It will be appreciated that the refrigerant gas flow through the enthalpy-increasing passage 24 into the scroll compressor 2 is actually in a pulsating pattern due to the periodic opening and closing of the enthalpy-increasing nozzle holes 242 of the scroll compressor 2, and that when the enthalpy-increasing vapor pressure is higher than the pressure in the compression chamber 25, the enthalpy-increasing vapor flow is injected into the compression chamber 25, and when the enthalpy-increasing vapor pressure is lower than the pressure in the compression chamber 25, the vapor flow in the compression chamber 25 flows into the enthalpy-increasing tube, thereby causing a backflow phenomenon. Above tonifying qi process and backward flow process take place in turn, make refrigerant gas form periodic pulsation, cause enthalpy-increasing pipeline and choke valve etc. easily and produce periodic excitation force, when low order excitation force frequency and enthalpy-increasing pipeline and choke valve block low order frequency are close, can arouse strong vibration to produce great noise, can lead to enthalpy-increasing pipeline and choke valve block fracture even, make scroll compressor 2's reliability descend, seriously influence scroll compressor 2's life.

The enthalpy-increasing pressure pulsation attenuation device 1 in this embodiment can effectively weaken the transfer effect of the airflow pulsation in the compression cavity 25 of the scroll compressor 2 to the enthalpy-increasing outer tube 11, or make the backflow airflow generate a radially inward speed to attenuate the propagation of the airflow backflow in the compressor to the enthalpy-increasing outer tube 11, so that the pressure pulsation intensity of the enthalpy-increasing outer tube 11 is weakened. In addition, the mixing loss of the backflow and the jet flow of the air flow in the scroll compressor 2 can be reduced, and the energy efficiency is improved.

When the scroll compressor 2 equipped with the enthalpy-increasing pressure pulsation damping device 1 of the present embodiment is used in an air conditioning system, the pressure pulsation level of the enthalpy-increasing outer tube 11 can be effectively weakened, the vibration of the enthalpy-increasing outer tube 11 and the throttle valve sheet is suppressed, the possibility of breakage of the enthalpy-increasing tube and the throttle valve sheet is greatly reduced, and the reliability of the scroll compressor 2 is improved.

Example two

The embodiment provides an enthalpy-increasing pressure pulsation damping device 1, which is further improved on the basis of the first embodiment.

As shown in fig. 1 to 3, one end of the inner static disk tube 241 of the throttle element 12 close to the enthalpy-increasing outer tube 11, that is, the end far from the enthalpy-increasing nozzle holes 242, is located so that a certain distance is kept between the enthalpy-increasing nozzle holes 242 and the nozzle hole 121, so that the part of the inner static disk tube 241 close to the enthalpy-increasing nozzle holes 242 can have enough space to contain gas. When the enthalpy-increasing spray holes 242 and the compression cavity 25 are in a closed state, enough gas can be contained in the static disc inner tube 241, so that the backflow of the gas flow to the enthalpy-increasing outer tube 11 is reduced, and the vibration caused by pressure pulsation is further reduced.

Wherein, the lateral surface of orifice 12 offsets with the medial surface of quiet dish inner tube 241 to eliminate the clearance between orifice 12 and the quiet dish inner tube 241, make orifice 12 both ends only can communicate through orifice 121, thereby strengthen the throttle effect, be favorable to reducing the air current of quiet dish inner tube 241 to flow back in the enthalpy-increasing outer tube 11. The orifice member 12 may be attached to the stationary disk inner tube 241 by a threaded connection or an interference fit to hold the orifice member 12 stationary.

Further, the enthalpy-increasing outer pipe 11 is a U-shaped pipe, and the U-shaped pipe is recessed downward in the height direction of the scroll compressor 2.

EXAMPLE III

The embodiment provides an enthalpy-increasing pressure pulsation damping device 1, which is further improved on the basis of the second embodiment.

As shown in fig. 3, 4 and 5, the throttle hole 121 specifically includes an inflow section 1211 and a throttle section 1212. The inflow section 1211 is communicated with the throttling section 1212, and the inflow section 1211 is disposed at one end of the throttling element 12 communicated with the enthalpy-increasing outer tube 11, that is, the inflow section 1211 is located at one end of the throttling section 1212 close to the enthalpy-increasing outer tube 11. During enthalpy-increasing air-filling, the air flow flows through the inflow section 1211 and the throttling section 1212 in sequence, and flows into the stationary disk inner tube 241.

The aperture of the inflow section 1211 is larger than that of the throttling section 1212, so as to guide the airflow and promote the airflow to flow to the portion, close to the enthalpy-increasing nozzle hole 242, of the inner tube 241 of the stationary disc through the throttling section 1212. When the enthalpy-increasing spray holes 242 are in a conducting state, the flow rate of the forward air supplement can be increased through the guiding effect of the inflow section 1211, and when the enthalpy-increasing spray holes 242 are in a closed state, the flow rate of the air flowing back to the enthalpy-increasing outer pipe 11 can be reduced through the throttling effect of the throttling section 1212, so that the flow rate of the air flowing back through the throttling hole 121 is smaller than that of the forward air supplement, the enthalpy-increasing effect of the scroll compressor 2 is promoted, and the vibration effect caused by pressure pulsation is reduced.

Further, as shown in fig. 4 to 6, in the axial direction of the inflow section 1211, from the end near the enthalpy-increasing outer tube 11 to the end near the throttling section 1212, the aperture of the inflow section 1211 gradually decreases, so that the inflow section 1211 is overall contracted to further enhance the guiding effect on the gas flow. Specifically, the inflow section 1211 may have a tapered structure as shown in fig. 5, but the inflow section 1211 may also have a tapered structure, for example, the contour line of the inner side surface of the inflow section 1211 is an arc, and as shown in fig. 6, the entire inflow section 1211 gradually tapers from the end near the enthalpy-increasing outer tube 11 to the port of the throttling section 1212.

Example four

The embodiment provides an enthalpy-increasing pressure pulsation damping device 1, which is further improved on the basis of the third embodiment.

As shown in fig. 7, 8 and 9, the orifice 121 further includes an outflow section 1213. Specifically, the outflow section 1213 is further provided at an end of the throttling section 1212 remote from the inflow section 1211, and is in communication with the throttling section 1212. In the process of air supply and enthalpy increase, the airflow flows into the static inner tube 241 through the inflow section 1211, the throttling section 1212 and the outflow section 1213 in sequence, and flows into the compression cavity 25 when the enthalpy increase spray holes 242 are in a conducting state. The aperture of the outflow section 1213 is larger than that of the throttling section 1212, so as to increase the coverage area of the outflow airflow, reduce the impact force of the outflow airflow, facilitate the flow stability of the air-supply enthalpy-increasing airflow, and improve the air-supply enthalpy-increasing efficiency.

Further, in the axial direction of the outflow section 1213, from the end close to the throttling section 1212 to the end far from the throttling section 1212, the aperture of the outflow section 1213 gradually increases to guide the outflow air flow, so that the outflow air flow can flow relatively gently from the throttling hole 121 into the stationary disk inner pipe 241. The outflow section 1213 may have a tapered structure as shown in fig. 8, or may have other expanding structures, for example, the contour line of the inner side surface of the outflow section 1213 is an arc, and as shown in fig. 9, the outflow section 1213 is gradually expanded from the port of the throttling section 1212 to the direction close to the enthalpy-increasing nozzle hole 242.

EXAMPLE five

As shown in fig. 10 and 11, the orifice 121 is entirely contracted, and the aperture of the orifice 121 in the axial direction gradually decreases from one end close to the enthalpy-increasing outer tube 11 to one end away from the enthalpy-increasing outer tube 11, for example, a tapered hole as shown in fig. 11, so as to increase the flow rate of the forward make-up air flow, decrease the flow rate of the return air flow, further enhance the enthalpy-increasing effect of the scroll compressor 2, weaken the transmission action of the pressure pulsation, and further alleviate the vibration caused by the pressure pulsation. The orifice 121 is not limited to a tapered hole, and may be another hole having a constricted shape.

EXAMPLE six

As shown in fig. 1, 2 and 12, at least a portion of the orifice 121 is a straight hole structure, for example, the orifice 121 may be a straight hole structure as a whole, as shown in fig. 12, so that when the airflow flows in the straight hole structure, the flow direction can be kept relatively stable, and at the same time, the blocking effect of the hole wall on the airflow is reduced, and the pressure loss of the airflow during the flow process is reduced. Of course, the orifice 121 may also be partially straight hole structure. The straight hole structure is convenient to process and beneficial to reducing the processing cost.

EXAMPLE seven

As shown in fig. 13, 14 and 15, at least a portion of the orifice hole 121 is in an inclined hole configuration. For example, the throttle hole 121 is of an inclined hole structure as a whole, and from one end close to the enthalpy-increasing outer tube 11 to one end far from the enthalpy-increasing outer tube 11, the throttle hole 121 is gradually inclined toward the top of the throttle member 12, as shown in fig. 14, wherein the central axis of the inclined hole structure and the central axis of the stationary disc inner tube 241 form a first angle a. Of course, the throttle hole 121 may have a slant hole structure only in part, and as shown in fig. 15, the throttle hole 121 is formed by a taper hole structure and a slant hole structure which are communicated with each other, wherein a central axis of the slant hole structure and a central axis of the stationary disc inner pipe 241 form a first angle b.

When the air flow flows in the inclined hole structure, the flow direction is consistent with the axial direction of the inclined hole and is kept relatively stable, so that the blocking effect of the hole wall on the air flow is reduced, and the pressure loss of the air flow in the flow process is further reduced.

The inclined direction of the inclined hole structure is not limited to the inclined direction toward the top of the orifice 12 in the present embodiment, and may be inclined in other directions.

Example eight

In one implementation of this embodiment, the orifice 121 may be a smooth hole to facilitate machining and also to help reduce pressure loss during the flow of the gas stream.

In another implementation of the present embodiment, the throttle hole 121 may be a threaded hole. The screwed joint can play certain guide effect to the air current, is favorable to the air current diffusion, and the screw hole can also be used for connecting simultaneously, for example orifice 121 can be through threaded connection with enthalpy-increasing outer tube 11, is favorable to improving sealing performance.

Example nine

As shown in fig. 1 to 3, the size of a portion of the orifice 121 is specifically limited in this embodiment to promote the vapor-filling enthalpy-increasing effect, and at the same time, to reduce the backflow of the gas flow in the inner tube 241 of the static disc into the enthalpy-increasing outer tube 11.

Specifically, in one implementation manner of the present embodiment, the area of the minimum cross section of the throttle hole 121 is 10% to 70% of the cross section area of the enthalpy-increasing throttle hole 242, the cross section area of the enthalpy-increasing throttle hole 242 may be made larger than the minimum cross section area of the throttle hole 121, and the flow rate of the enthalpy-increasing throttle hole 242 is larger than the flow rate of the throttle hole 121, so that after the airflow flows into the inner dead pan tube 241 through the throttle hole 121, the airflow can quickly flow into the compression cavity 25 through the enthalpy-increasing throttle hole 242, so as to reduce the backflow of the airflow in the inner dead pan tube 241 to the enthalpy-increasing outer tube 11. Wherein, the area of the minimum cross section of the orifice 121 may be 30%, 40%, 50% of the cross section area of the enthalpy-increasing orifice 242.

In the second implementation manner of the present embodiment, the area of the minimum cross section of the throttle hole 121 is 10% to 50% of the cross section area of the inner tube 241 of the stationary disk, and may be, for example, 20%, 30%, or 40%, so that the inner tube 241 of the stationary disk has enough space to accommodate a sufficient amount of airflow when the enthalpy-increasing nozzle holes 242 are in the closed state, so as to reduce the backflow of the airflow to the enthalpy-increasing outer tube 11.

In a third implementation manner of the present embodiment, the length of the throttle hole 121 is 20% to 60%, for example, 30%, 40%, 50%, of the length of the static disc inner tube 241, so that the static disc inner tube 241 and the throttle hole 121 maintain a proper length ratio, and enough space is left for the static disc inner tube 241 to accommodate the airflow, and the backflow of the airflow to the enthalpy-increasing outer tube 11 is reduced.

In the fourth implementation manner of the present embodiment, the length of the hole section corresponding to the minimum cross section of the throttle hole 121 is 5% to 100% of the total length of the throttle hole 121, so that the hole section corresponding to the minimum cross section of the throttle hole 121 has a certain length to facilitate throttling of the air flow, and the throttled air flow can relatively stably flow into the dead disc inner pipe 241, and meanwhile, the strength of the hole section can be sufficient to prevent damage when the air flow pressure is too high.

Among other things, the orifice 121 in the present embodiment meets at least one of the above-mentioned dimensional requirements to further enhance the enthalpy-increasing effect of the scroll compressor 2 while further attenuating the vibration caused by the pressure pulsation.

A specific embodiment of the enthalpy-increasing pressure pulsation damping device 1 described above is provided below:

The enthalpy-increasing pressure pulsation damping device 1 includes an enthalpy-increasing outer tube 11 and a throttle member 12. The throttling element 12 is communicated with the enthalpy-increasing outer pipe 11; the throttling element 12 is arranged in the static disc inner pipe 241, the throttling element 12 is provided with a through throttling hole 121, and two ends of the throttling hole 121 are respectively communicated with the enthalpy-increasing outer pipe 11 and the static disc inner pipe 241; the enthalpy-increasing outer pipe 11 is connected to one end of the inner pipe 241 of the stationary disc, which is far away from the enthalpy-increasing nozzle holes 242, and is used for connecting an external refrigerant pipeline. The enthalpy-increasing outer pipe 11 is a U-shaped pipe, and the U-shaped pipe is recessed downward in the height direction of the scroll compressor 2.

When the scroll compressor 2 is in operation, the enthalpy-increasing outer pipe 11 is used as an enthalpy-increasing inlet, and a gas refrigerant in an external refrigerant pipeline flows into the compression cavity 25 through the enthalpy-increasing channel 24 in the enthalpy-increasing outer pipe 11 and the static disc 22 so as to realize the effect of air supplement and enthalpy increase, effectively reduce the medium temperature in the compression cavity 25, improve the volume efficiency, greatly reduce the exhaust temperature of the scroll compressor 2 and improve the reliability of the scroll compressor 2. The orifice 121 is not limited to a straight hole, an inclined hole, or a bent hole, and the hole diameter of the orifice 121 may be constant or may vary in the axial direction of the orifice 121. Wherein, at least part of the aperture of the throttle hole 121 is smaller than the pipe diameter of the inner pipe 241 of the static disc, so as to generate flow resistance through the change of the cross-sectional area of the throttle hole 121, and reduce the gas flow back to the enthalpy-increasing outer pipe 11 by using the throttling effect.

Wherein, the lateral surface of orifice 12 offsets with the medial surface of quiet dish inner tube 241 to eliminate the clearance between orifice 12 and the quiet dish inner tube 241, make orifice 12 both ends only can communicate through orifice 121, thereby strengthen the throttle effect, be favorable to reducing the air current of quiet dish inner tube 241 to flow back in the enthalpy-increasing outer tube 11. The orifice member 12 may be attached to the stationary disk inner tube 241 by a threaded connection or an interference fit to hold the orifice member 12 stationary. The orifice 121 may be a smooth hole or a threaded hole.

The specific shape of the orifice 121 may be implemented in a number of different ways.

As shown in fig. 3, 4 and 5, the throttle hole 121 specifically includes an inflow section 1211 and a throttle section 1212. The inflow section 1211 is communicated with the throttling section 1212, and the inflow section 1211 is disposed at one end of the throttling element 12 communicated with the enthalpy-increasing outer tube 11, that is, the inflow section 1211 is located at one end of the throttling section 1212 close to the enthalpy-increasing outer tube 11. During enthalpy-increasing air-filling, the air flow flows through the inflow section 1211 and the throttling section 1212 in sequence, and flows into the stationary disk inner tube 241. The aperture of the inflow section 1211 is larger than that of the throttling section 1212, so as to guide the airflow and promote the airflow to flow to the portion, close to the enthalpy-increasing nozzle hole 242, of the inner tube 241 of the stationary disc through the throttling section 1212. When the enthalpy-increasing spray holes 242 are in a conducting state, the flow rate of the forward air supplement can be increased through the guiding effect of the inflow section 1211, and when the enthalpy-increasing spray holes 242 are in a closed state, the flow rate of the air flowing back to the enthalpy-increasing outer pipe 11 can be reduced through the throttling effect of the throttling section 1212, so that the flow rate of the air flowing back through the throttling hole 121 is smaller than that of the forward air supplement, the enthalpy-increasing effect of the scroll compressor 2 is promoted, and the vibration effect caused by pressure pulsation is reduced.

Further, as shown in fig. 7, 8, and 9, the orifice 121 further includes an outflow section 1213. Specifically, the outflow section 1213 is further provided at an end of the throttling section 1212 remote from the inflow section 1211, and is in communication with the throttling section 1212. In the process of air supply and enthalpy increase, the airflow flows into the static inner tube 241 through the inflow section 1211, the throttling section 1212 and the outflow section 1213 in sequence, and flows into the compression cavity 25 when the enthalpy increase spray holes 242 are in a conducting state. The aperture of the outflow section 1213 is larger than that of the throttling section 1212, so as to increase the coverage area of the outflow airflow, reduce the impact force of the outflow airflow, facilitate the flow stability of the air-supply enthalpy-increasing airflow, and improve the air-supply enthalpy-increasing efficiency.

As shown in fig. 10 and 11, the orifice 121 may be entirely contracted, and the aperture of the orifice 121 in the axial direction gradually decreases from one end close to the enthalpy-increasing outer tube 11 to one end away from the enthalpy-increasing outer tube 11, for example, the taper hole structure shown in fig. 11, so as to increase the flow rate of the forward make-up air flow, decrease the flow rate of the return air flow, further enhance the enthalpy-increasing effect of the scroll compressor 2, weaken the transmission effect of the pressure pulsation, and further alleviate the vibration caused by the pressure pulsation.

As shown in fig. 12, the orifice 121 may have a straight hole structure as a whole, so that when the airflow flows through the straight hole structure, the flow direction can be kept relatively stable, the blocking effect of the hole wall on the airflow is reduced, and the pressure loss of the airflow during the flow process is reduced. Of course, the orifice 121 may also be partially straight hole structure. The straight hole structure is convenient to process and beneficial to reducing the processing cost.

As shown in fig. 14, the throttle hole 121 is also of an inclined hole structure as a whole, and the throttle hole 121 gradually inclines toward the top of the throttle member 12 from the end close to the enthalpy-increasing outer tube 11 to the end far from the enthalpy-increasing outer tube 11, wherein the central axis of the inclined hole structure and the central axis of the stationary disk inner tube 241 form a first angle a. Of course, the throttle hole 121 may have a slant hole structure only in part, and as shown in fig. 15, the throttle hole 121 is formed by a taper hole structure and a slant hole structure which are communicated with each other, wherein a central axis of the slant hole structure and a central axis of the stationary disc inner pipe 241 form a first angle b.

In addition, the orifice 121 of the orifice 12 in this embodiment also meets the following dimensional requirements:

the area of the minimum cross-section of the orifice 121 is 10% to 70% of the cross-sectional area of the enthalpy-increasing orifice 242, and specifically, the area of the minimum cross-section of the orifice 121 may be 30%, 40%, 50% of the cross-sectional area of the enthalpy-increasing orifice 242;

the area of the minimum cross section of the orifice 121 is 10% to 50% of the cross section area of the stationary disc inner pipe 241, and may be, for example, 20%, 30%, 40%;

the length of the orifice 121 is 20% to 60% of the length of the stationary disk inner pipe 241, and may be, for example, 30%, 40%, 50%;

the length of the hole section corresponding to the minimum cross section of the throttle hole 121 is 5% to 100% of the total length of the throttle hole 121.

Table 1: pressure pulsation average amplitude reduction effect under ARI30 Hz-ARI 120Hz working conditions

Technical scheme	ARI30Hz, ARI60Hz, ARI90Hz and ARI120Hz pressure pulsation amplitude average/Kpa under operating conditions
		The existing technical scheme	142.39
Using the scheme of FIG. 15	82.37(-42.2％)
		Using the scheme of FIG. 8	96.71(-32.1％)

For example, table 1 shows the results of the test of the average amplitude of the pressure pulsation in the standard operating conditions ARI30Hz to ARI120Hz (ARI, American Air-Conditioning and regeneration Institute for short) of the scroll compressor 2 using the enthalpy-increasing pressure pulsation damping device 1 of the solution of fig. 15 and 8. It can be seen that under the four standard working conditions of 30Hz, 60Hz, 90Hz and 120Hz, the average value of the pressure pulsation amplitude of the prior art is 142.39Kpa, the average value of the pressure pulsation amplitude of the scheme adopting fig. 15 is 82.37Kpa, which is reduced by 42.2% compared with the prior art, and the average value of the pressure pulsation amplitude of the scheme adopting fig. 8 is 96.71Kpa, which is reduced by 32.1% compared with the prior art. It can be seen that the enthalpy-increasing pressure pulsation damping device 1 of the present embodiment can effectively reduce the pressure pulsation amplitude of the scroll compressor 2.

Example ten

The scroll compressor 2 provided in the present embodiment includes a housing 21, a stationary disk 22, a movable scroll 23, and the enthalpy-increasing pressure pulsation damping device 1 in any of the above embodiments.

As shown in fig. 1 and 2, the fixed scroll 22 and the movable scroll 23 are correspondingly arranged in the housing 21, and a compression chamber 25 is formed between the movable scroll 23 and the fixed scroll 22; an enthalpy-increasing channel 24 comprising a static disc inner tube 241 and enthalpy-increasing jet holes 242 is arranged in the static disc 22, and the enthalpy-increasing jet holes 242 communicate the static disc inner tube 241 with the compression cavity 25. When the scroll compressor 2 is in operation, the movable scroll 23 rotates relative to the stationary scroll 22, and the enthalpy-increasing nozzle holes 242 are periodically opened or closed. As shown in fig. 2, the number of enthalpy-increasing injection holes 242 may be two, and the two enthalpy-increasing injection holes are respectively close to two opposite sides of the static plate inner tube 241.

The throttling element 12 of the enthalpy-increasing pressure pulsation damping device 1 is arranged in the inner pipe 241 of the static disc, and the enthalpy-increasing outer pipe 11 is communicated with the throttling hole 121 of the throttling element 12 and extends outwards through the shell 21 so as to be connected with an external refrigerant pipeline. The external refrigerant flows into the stationary plate inner tube 241 through the enthalpy-increasing outer tube 11 and the orifice 121, and further flows into the compression chamber 25 when the enthalpy-increasing nozzle holes 242 are opened. Through the medium pressure cavity part that introduces refrigerant gas into compression chamber 25 through enthalpy-increasing channel 24, can effectively reduce the temperature of refrigerant in compression chamber 25, improve the volumetric efficiency to reduce scroll compressor 2's exhaust temperature and heating capacity by a wide margin, can improve scroll compressor 2's reliability simultaneously.

When the enthalpy-increasing spray holes 242 are closed, the throttling effect of the throttle holes 121 reduces the backflow of the airflow in the inner tube 241 of the static disc to the enthalpy-increasing outer tube 11, so as to weaken the vibration caused by the periodic pressure pulsation of the backflow airflow, thus being beneficial to reducing the possibility of damage of the enthalpy-increasing outer tube 11, improving the reliability of the scroll compressor 2 and prolonging the service life.

Further, as shown in FIG. 16, the scroll compressor 2 further includes a crankshaft 261, a main bracket 262, and a slip ring structure 263, all disposed within the housing 21. The crankshaft 261 is disposed below the movable scroll 23 and connected to the bottom of the movable scroll 23, so that the crankshaft 261 is utilized to drive the movable scroll 23 to move, and further, the enthalpy-increasing injection holes 242 are periodically opened or closed. The crankshaft 261 is sleeved with a main support 262, and the main support 262 is connected with the movable scroll 23 to fix the movable scroll 23. A slip ring structure 263, such as a cross slip ring, is provided between the orbiting scroll 23 and the main support 262 to play a role of preventing self-rotation.

In addition, the scroll compressor 2 in this embodiment has all the beneficial effects of the enthalpy-increasing pressure pulsation damping device 1 in any of the above embodiments, and the details are not repeated herein.

EXAMPLE eleven

An air conditioning system is provided in this embodiment and comprises a condenser, an evaporator, a flash evaporator and a scroll compressor 2 as in any of the embodiments described above. The condenser, the evaporator, the flash evaporator and the scroll compressor 2 are connected through pipelines to form a loop, so that the air conditioning effect is realized through the heat exchange of a refrigerant.

Further, the outlet of the flash evaporator is connected with the enthalpy-increasing outer tube 11 of the scroll compressor 2 through a pipeline, so that the refrigerant passing through the flash evaporator is supplied to the enthalpy-increasing pressure pulsation damping device 1 of the scroll compressor 2 and flows into the compression cavity 25 of the scroll compressor 2, and the backflow of the refrigerant gas is reduced through the throttling function of the enthalpy-increasing pressure pulsation damping device 1. Of course, the air conditioning system of the present embodiment may be configured such that the refrigerant flowing out of the condenser or the evaporator is supplied into the scroll compressor 2.

In addition, the air conditioning system in this embodiment also has all the beneficial effects of the scroll compressor 2 in any of the above embodiments, and will not be described herein again.

The following is a specific example of the present application:

the embodiment provides an enthalpy-increasing pulsation attenuation device for a scroll compressor, an enthalpy-increasing static disc inner straight pipe is pressed into an enthalpy-increasing static scroll inner throttling pipe, the shape of an inner hole of the enthalpy-increasing static disc is a combination of a straight hole and a tapered hole, the tapered hole is favorable for enthalpy-increasing hole gas jet inflow (reduction of flow resistance), the cross section of the straight hole is smaller than the cross section area of the enthalpy-increasing static disc inner straight pipe, meanwhile, the throttling effect caused by area change is realized for 10% -70% of the enthalpy-increasing jet hole cross section area, and transmission of pressure pulsation in a compression cavity to the enthalpy-increasing pipe is weakened. Meanwhile, the steps (hole cross-sectional area change) formed by the straight pipe inside the static disc and the throttling pipe inside the enthalpy-increasing static vortex from left to right generate flow resistance to the backflow of air flow in the compression cavity to the enthalpy-increasing pipe through the enthalpy-increasing spray holes, the backflow can be effectively prevented, the pulsation effect generated by alternative action of jet flow and backflow is further reduced, the technical effect of reducing the pressure pulsation level in the enthalpy-increasing pipe is achieved, and the problems that in the prior art, the refrigerant in the enthalpy-increasing pipe generates pulsation to cause the fracture of the connecting part of the enthalpy-increasing pipe and the shell of the compressor and the fracture of a valve plate are solved. Meanwhile, the weakening of the reflux strength reduces the mixing loss generated by reflux, and is beneficial to improving the energy efficiency.

The embodiment provides another enthalpy-increasing pulsation attenuation device for a scroll compressor, and the mechanism and the technical effect are similar to those of the enthalpy-increasing pulsation attenuation device, wherein an inner hole of a throttling pipe in an enthalpy-increasing static scroll is changed into an inclined hole, and the technical effect of reducing the pressure pulsation level in the enthalpy-increasing pipe can be realized.

The embodiment provides another enthalpy-increasing pulsation attenuation device for a scroll compressor, an inner hole of an inner throttling pipe of an enthalpy-increasing static scroll is a tapered hole (with a certain taper), the minimum cross-sectional area of the inner hole is smaller than the cross-sectional area of an inner straight pipe of a static disc, meanwhile, the inner throttling pipe is 10% -70% of the cross-sectional area of an enthalpy-increasing spraying hole, the tapered hole on the right side of the inner throttling pipe of the enthalpy-increasing static scroll is beneficial to the injection and inflow (reduction of flow resistance) of gas of the enthalpy-increasing pipe, the left side of the inner throttling pipe of the enthalpy-increasing static scroll and the inner straight pipe of the static disc form a step to cause the change of the cross-sectional area, flow resistance is generated for the backflow of air flow in a compression cavity to the enthalpy-increasing pipe through the enthalpy-increasing spraying hole, the pulsation effect generated by the alternate action of jet flow and backflow is further reduced, and the technical effect of reducing the pressure pulsation level in the enthalpy-increasing pipe is achieved.

The embodiment provides another enthalpy-increasing pulsation attenuation device for a scroll compressor, wherein the shape of the throttling pipe inside an enthalpy-increasing static scroll is formed by combining two conical holes and a straight hole, a stronger blocking effect can be generated on backflow, and the pulsation effect generated by the alternating action of jet flow and backflow is further reduced.

The embodiment also provides air conditioning equipment, generally, an air conditioning system comprises a condenser, an evaporator, a flash evaporator and a compressor which are connected through pipelines, wherein the compressor in the air conditioning system is a scroll compressor comprising an enthalpy-increasing pulsation attenuation device.

Further, in the air conditioning system, a pipeline connected with an outlet of the flash evaporator is connected to an air inlet of the enthalpy-increasing pulsation damping device of the scroll compressor, so that the refrigerant passing through the flash evaporator is supplied into the enthalpy-increasing pulsation damping device of the compressor and then enters a compression cavity of the compressor. Of course, the refrigerant from the condenser or the evaporator may be supplied to the compressor.

The technical scheme according to some embodiments of the present application is described in detail with reference to the accompanying drawings, so that the transfer effect of the air flow pulsation in the compression cavity of the scroll compressor to the enthalpy-increasing outer tube can be effectively weakened, the propagation of the air flow backflow in the compressor to the enthalpy-increasing outer tube is attenuated, the pressure pulsation strength of the enthalpy-increasing outer tube is weakened, the vibration of the enthalpy-increasing outer tube and the throttle valve plate is suppressed, the possibility of breakage of the enthalpy-increasing pipeline and the throttle valve plate is greatly reduced, and the reliability of the scroll compressor is improved. In addition, the mixing loss of the backflow and the jet flow of the air flow in the scroll compressor 2 can be reduced, and the energy efficiency is improved.

In embodiments according to the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. Specific meanings of the above terms in the embodiments according to the present application can be understood by those of ordinary skill in the art as the case may be.

In the description of the embodiments according to the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the technical aspects of the present application.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means 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 in accordance with the application. In this specification, the schematic representations of the terms used above do not necessarily 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.

The above description is only for the purpose of illustrating preferred embodiments of the present application and is not intended to limit the technical solutions of the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the technical solutions of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the technical scheme of the application shall be included in the protection scope of the application.

Claims

1. An enthalpy-increasing pressure pulsation damping device for a scroll compressor having an enthalpy-increasing pipe including a stationary disc inner pipe and enthalpy-increasing injection holes, the enthalpy-increasing pressure pulsation damping device comprising:

the enthalpy-increasing outer pipe is connected to one end, far away from the enthalpy-increasing spray holes, of the static disc inner pipe and is used for being connected with an external refrigerant pipeline;

the throttling element is arranged in a static disc inner pipe of the scroll compressor, a throttling hole is arranged in the throttling element, two ends of the throttling hole are respectively communicated with the enthalpy-increasing outer pipe and the static disc inner pipe, and at least part of the aperture of the throttling hole is smaller than the pipe diameter of the static disc inner pipe.

2. Enthalpy-increasing pressure pulsation damping device according to claim 1,

the throttling element is arranged at one end, close to the enthalpy-increasing outer pipe, of the static disc inner pipe, and the outer side face of the throttling element is abutted to the inner side face of the static disc inner pipe.

3. The enthalpy-increasing pressure pulsation damping device according to claim 2, wherein the orifice hole includes:

the inflow section is arranged at one end of the throttling element communicated with the enthalpy-increasing outer pipe;

the throttling section is communicated with one end of the inflow section, which is far away from the enthalpy-increasing outer pipe;

wherein the aperture of the inflow section is larger than the aperture of the throttling section.

4. Enthalpy-increasing pressure pulsation damping device according to claim 3,

the aperture of the inflow section is gradually reduced from one end close to the enthalpy-increasing outer pipe to one end close to the throttling section.

5. The enthalpy-increasing pressure pulsation damping device according to claim 3, wherein the orifice further includes:

the outflow section is arranged at one end, far away from the inflow section, of the throttling section and communicated with the throttling section, and the aperture of the outflow section is larger than that of the throttling section.

6. Enthalpy-increasing pressure pulsation damping device according to claim 5,

the outflow section is close to one end of the throttling section to one end far away from the throttling section, and the aperture of the outflow section is gradually increased.

7. Enthalpy-increasing pressure pulsation damping device according to claim 3,

the orifice hole is gradually reduced from one end close to the enthalpy-increasing outer pipe to one end far away from the enthalpy-increasing outer pipe.

8. Enthalpy-increasing pressure pulsation damping device according to claim 2,

at least part of the throttling holes are in straight hole structures and extend along the axial direction of the static disc inner pipe.

9. Enthalpy-increasing pressure pulsation damping device according to claim 2,

at least part of the throttling holes are of inclined hole structures, and a first angle is formed between the central axis of each inclined hole structure and the central axis of the inner pipe of the static disc.

10. Enthalpy-increasing pressure pulsation damping device according to any one of claims 2 to 9,

the area of the minimum cross section of the throttling hole is 10-70% of the cross section area of the enthalpy-increasing spraying hole; and/or

The area of the minimum cross section of the throttling hole is 10-50% of the cross section area of the inner pipe of the static disc; and/or

The length of the throttling hole is 20% to 60% of the length of the static disc inner pipe; and/or

The length of the hole section corresponding to the minimum cross section of the throttle hole is 5% to 100% of the total length of the throttle hole.

11. Enthalpy-increasing pressure pulsation damping device according to any one of claims 1 to 9,

the throttling hole is a unthreaded hole or a threaded hole.

12. A scroll compressor, comprising:

a housing;

the fixed disc is arranged in the shell, an enthalpy-increasing pipeline is arranged in the fixed disc, and the enthalpy-increasing pipeline comprises a fixed disc inner pipe and at least one enthalpy-increasing spray hole;

the movable scroll is arranged in the shell, the movable scroll and the static disc surround to form a compression cavity, and the movable scroll can rotate relative to the static disc so as to enable the compression cavity to be communicated with the enthalpy-increasing spray holes;

the enthalpy-increasing pressure pulsation damping device according to any one of claims 1 to 11, a throttle member of the enthalpy-increasing pressure pulsation damping device being provided in the inner tube of the stationary disk, an enthalpy-increasing outer tube of the enthalpy-increasing pressure pulsation damping device projecting outwardly through the housing.

13. The scroll compressor of claim 12, further comprising:

the crankshaft is arranged below the movable scroll plate, is connected with the bottom of the movable scroll plate and is used for driving the movable scroll plate to move relative to the static plate;

the main bracket is sleeved on the crankshaft and is connected with the movable scroll plate;

and the slip ring structure is arranged between the movable scroll and the main bracket.

14. An air conditioning system, comprising:

a condenser, an evaporator and a flash evaporator;

a scroll compressor as claimed in claim 12 or 13, connected in circuit with said condenser, said evaporator and said flash evaporator by conduits.

15. The air conditioning system of claim 14,

and the outlet of the flash evaporator is connected with the enthalpy-increasing outer pipe of the scroll compressor through a pipeline.