CN107620705B - Scroll compressor and air conditioning system - Google Patents
Scroll compressor and air conditioning system Download PDFInfo
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- CN107620705B CN107620705B CN201710788797.XA CN201710788797A CN107620705B CN 107620705 B CN107620705 B CN 107620705B CN 201710788797 A CN201710788797 A CN 201710788797A CN 107620705 B CN107620705 B CN 107620705B
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Abstract
The invention provides a scroll compressor and an air conditioning system. The scroll compressor includes: a housing enclosing a mounting cavity; the compression mechanism comprises a fixed scroll and an movable scroll, the fixed scroll and the movable scroll are meshed with each other to form a compression cavity, the fixed scroll is provided with a mounting hole, and the bottom of the mounting hole is provided with an enthalpy increasing port communicated with the mounting hole and the compression cavity; increase enthalpy check subassembly, including check valve, elastic element and increase the enthalpy passageway, increase the enthalpy passageway and be connected with the mounting hole, the check valve is installed in the mounting hole, and elastic element supports and pushes up between the bottom of check valve and mounting hole, and the check valve is opened or is closed in order to increase the enthalpy passageway in the mounting hole reciprocating motion, and at least one side is provided with buffer structure in order to prevent check valve reciprocating motion's in-process impact to increase enthalpy passageway and quiet vortex dish in the opposite both sides of check valve. The invention can avoid the phenomenon that the impact end surface of the check valve is sunken or the stop reverse flow sealing end surface of the check valve is broken due to repeated reciprocating impact of the check valve.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a scroll compressor and an air conditioning system.
Background
With the recent years, the application range of heat pump air conditioner and heat pump water heater systems in the low-temperature or ultra-low-temperature fields is continuously widened. The heat pump system often needs to operate at a low ambient temperature of 0 ℃ or even below-15 ℃, and the exhaust temperature rises due to the increase of the suction-exhaust pressure ratio, so that the problems of insufficient heating quantity, overheating of a compressor and the like are caused. In recent years, the enthalpy increasing system of the quasi-two-stage scroll compressor has the advantages of effectively improving the heating capacity and energy efficiency of the system under the low-temperature or ultralow-temperature working condition, improving the reliability of the compressor and the like, and has gradually become an important development direction of a heat pump system.
The quasi-two-stage scroll compressor enthalpy-increasing system adopts an injection enthalpy-increasing scroll compressor, directly injects and supplements the refrigerant with the system economizer at the intermediate pressure into a scroll pump body compression cavity through an enthalpy-increasing channel, and performs mixed compression with the high-temperature refrigerant in the compression cavity, so that the exhaust specific enthalpy is reduced, the exhaust temperature of the compressor is reduced, and the reliability is improved. Meanwhile, the specific enthalpy of the inlet of the evaporator of the system is reduced, and the displacement of the compressor is increased, so that the heating capacity and the energy efficiency of the system are improved. However, the heat pump system only needs to start the air supplementing and enthalpy increasing to improve the heating capacity in a low-temperature or ultralow-temperature environment, and the air supplementing and enthalpy increasing are not needed in most working conditions all year round. Under the condition that the system is closed for supplementing air and increasing enthalpy, the refrigerant in the compression cavity can reversely flow into the enthalpy-increasing channel containing cavity to carry out thermal expansion, so that extra compression power consumption is increased, and the problem of energy efficiency reduction is caused. Therefore, it is necessary to provide a check valve for preventing reverse flow in the enthalpy increasing passage thereof; when the system is closed for supplementing air and increasing enthalpy, the compression cavity and the enthalpy increasing channel can be cut off in time, and the setting position of the check valve is close to the compression cavity as much as possible, so that repeated expansion and compression of the refrigerant in the containing cavity outside the compression cavity are reduced. Further, no matter the system is opened or closed for air supplementing and enthalpy increasing operation, the pressure in the compression cavity periodically fluctuates up and down at the middle air supplementing pressure along with the rotation of the crankshaft, so that the check valve is repeatedly opened and closed. The check valve body periodically reciprocates, and impacts the end face with limit function to the check valve body back and forth, so that deformation and depression at the limit end face or valve body fracture easily occur, and the plastic deformation can lead to the reduction and even blocking of the area of the enthalpy-increasing air supplementing port; the plastic deformation and impact adhesion of the limiting end surface or the breakage of the valve body can generate tiny impurities, and the tiny impurities enter the vortex pump body through the enthalpy-increasing air supplementing port to directly cause abnormal damage of the compressor. In addition, the reciprocating periodic impact of the check valve body can increase the noise and vibration of the compressor. Therefore, a buffer structure needs to be added on the one-way valve to solve the above problems.
Patent document CN204783642U discloses a scroll compressor injection check valve structure, although the problem of refrigerant backflow at the time of closing enthalpy increase can be solved. However, the system is opened or closed to perform the air supplementing and enthalpy increasing operation, and the check valve periodically and reciprocally impacts the fixed scroll and the back plate due to the fact that the pressure at the injection port communicated with the compression cavity periodically fluctuates up and down at the middle air supplementing pressure. This can cause the compressor to suffer from the above-described problems of compressor reliability and noise caused by the reciprocating impact of the check valve.
Disclosure of Invention
The invention mainly aims to provide a scroll compressor and an air conditioning system, which are used for solving the problem that a check valve of the scroll compressor in the prior art is easy to deform an end face or break a valve body due to repeated opening and closing.
In order to achieve the above object, according to one aspect of the present invention, there is provided a scroll compressor comprising: the shell is surrounded to form an installation cavity; the compression mechanism comprises a fixed scroll and an movable scroll, the fixed scroll and the movable scroll are meshed with each other to form a compression cavity, the fixed scroll is provided with a mounting hole, and the bottom of the mounting hole is provided with an enthalpy increasing port communicated with the mounting hole and the compression cavity; the enthalpy-increasing check assembly comprises a check valve, an elastic element and an enthalpy-increasing channel, the enthalpy-increasing channel is connected with the mounting hole, the check valve is mounted in the mounting hole, the elastic element abuts against the bottom of the check valve and the bottom of the mounting hole, and the check valve reciprocates in the mounting hole to open or close the enthalpy-increasing channel; at least one of the two opposite sides of the check valve is provided with a buffer structure to prevent impact of the check valve with the enthalpy increasing channel and the fixed scroll in the reciprocating motion process.
Further, the check valve includes: the check valve cuts off the reverse flow sealing end face; the diversion channel penetrates through the check valve; the flange is arranged on the periphery of the stop countercurrent sealing end face of the check valve in a surrounding mode, a first buffering containing cavity is formed in the periphery of the enthalpy increasing channel, and a groove matched with the flange is formed in the surrounding mode of the first buffering containing cavity and the inner wall of the mounting hole.
Further, the flange is an annular flange, and the first buffer volume is an annular buffer volume.
Further, the buffer structure comprises a first throttling hole, wherein the first throttling hole is arranged on the side wall of the enthalpy increasing channel and is used for communicating the first buffer containing cavity with the pipe hole of the enthalpy increasing channel.
Further, the bottom of mounting hole is provided with the second buffering and holds the chamber, and the check valve still includes the boss, and the boss setting is in the check valve and is stopped one side of keeping away from the flange of countercurrent seal terminal surface, boss and second buffering hold chamber looks adaptation.
Further, the cushioning structure further includes a second orifice that communicates the second cushioning volume with the compression chamber.
Further, the elastic element is a spring.
Further, the enthalpy increasing channel is sealed with the mounting hole through a sealing ring.
Further, the shell comprises a shell body and an end cover, wherein the end cover is arranged at the end part of the shell body, the end cover is positioned on the side face of the fixed scroll, and the enthalpy increasing channel and the end cover are integrally formed.
Further, the mounting hole extends along the axial direction of the fixed scroll, the axial direction of the end cover is provided with an enthalpy increasing channel, the radial direction of the end cover is provided with an enthalpy increasing pipe connecting port communicated with the enthalpy increasing channel, and the enthalpy increasing channel is connected with the mounting hole.
Further, the enthalpy-increasing check assembly is one, two or more than two, and the enthalpy-increasing check assembly is arranged along the circumference of the fixed scroll.
According to another aspect of the present invention, there is provided an air conditioning system including a scroll compressor, the scroll compressor being the above-described scroll compressor.
By the aid of the technical scheme, due to the fact that the buffer structure is arranged on the vortex compressor, impact between the check valve and the enthalpy increasing channel and between the check valve and the vortex fixed vortex disc can be effectively prevented in the process that the check valve reciprocates in the mounting hole under the action of the buffer structure, the check valve is further protected, and the phenomenon that the end face of the check valve is concave or the end face of the check valve is broken due to the fact that the enthalpy increasing channel is repeatedly opened or closed is prevented. Meanwhile, noise in the using process of the scroll compressor can be reduced, and reliability of the scroll compressor is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 schematically illustrates a cross-sectional view of a scroll compressor of the present invention;
FIG. 2 schematically illustrates an exploded view of a non-orbiting scroll and enthalpy increasing check assembly of the scroll compressor of the present invention;
fig. 3 schematically shows a first perspective view of the check valve of the present invention;
fig. 4 schematically shows a second perspective view of the check valve of the present invention;
FIG. 5 schematically illustrates a perspective view of an end cap of the present invention;
fig. 6 schematically shows an enlarged view of the M region in fig. 5;
FIG. 7 schematically illustrates an enlarged view of the enthalpy increasing check assembly of the present invention in a closed state;
FIG. 8 schematically illustrates an enlarged view of the cushioning effect of the closing process of the enthalpy increasing check assembly of the present invention;
FIG. 9 schematically illustrates an enlarged view of the enthalpy increasing check assembly of the present invention in an open state; and
fig. 10 schematically illustrates a diagram of the damping effect of the closing process of the enthalpy-increasing check assembly in the present invention.
Wherein the above figures include the following reference numerals:
2. a compression mechanism; 3. a motor assembly; 4. a driving mechanism; 5. a housing; 6. enthalpy-increasing check assembly; 10. a suction side region; 11. a compression chamber; 12. an exhaust side region; 13. a medium pressure back pressure chamber; 201. a fixed scroll; 201a, a fixed scroll exhaust port; 201b, enthalpy increasing port; 201c, a second buffer accommodating cavity; 201d, a second orifice; 201e, mounting holes; 202. an orbiting scroll; 202a, introducing a medium pressure channel into the back pressure chamber; 203. a drive bearing; 204. anti-rotation wear-resistant steel ring; 205. a medium pressure chamber seal ring; 206. High-low pressure separation sealing rings; 301. a motor stator; 302. a motor rotor; 303. a main balance block; 304. an auxiliary balance block; 305. A first rotor cover plate; 306. a second rotor cover plate; 401. a mounting bracket; 402. a crankshaft; 403. a crank pin; 404. an eccentric sleeve; 405. a main bearing; 406. anti-rotation positioning pins; 407. a positioning pin; 501. a housing; 501a, an air suction port; 502. an end cap; 502a, compressor discharge; 502b, enthalpy-increasing pipe connection ports; 502c, enthalpy increasing channel 502c;502d, a first buffer accommodating cavity; 502e, a first orifice; 502f, enthalpy-increasing seal ring groove; 502g, check sealing end face; 503. a sub-bearing; 504. a fastening bolt; 601. a check valve; 601a, a diversion channel; 601b, flanges; 601c, a boss; 601d, a check valve is used for stopping the countercurrent sealing end surface; 602. an elastic element; 603. a seal ring; 701. clamping springs; 702. and a shaft seal.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1, according to an embodiment of the present invention, there is provided a scroll compressor, which mainly includes a compression mechanism 2, a motor assembly 3, a transmission driving mechanism 4, a housing 5, and an enthalpy-increasing check assembly 6.
Wherein, the housing 5 encloses a mounting cavity, and the motor stator 301 and the auxiliary bearing 503 are fixedly mounted in the mounting cavity of the housing 501 in an interference manner. The motor rotor 302 is connected with the main balance block 303, the auxiliary balance block 304, the first rotor cover plate 305 and the second rotor cover plate 306 through rivets; crank pin 403 is interference fit with crankshaft 402, and crank pin 403 is integrally interference connected with crankshaft 402 via motor rotor 302 with crankshaft 402. The inner ring and the outer ring of the main bearing 405 are respectively connected with the crankshaft 402 and the bracket 401 in an interference manner, and the bracket 401 is fixed in a mounting cavity formed by the enclosure of the shell 5; since the crankshaft 402 is connected to the inner ring of the sub-bearing 503 by interference fit, the crankshaft 402 cannot move axially and can only rotate. The shell 501 is fixedly connected with the end cover 502 through a fastening bolt 504, the fixed scroll 201 and the bracket 401 are pressed and fixed in the mounting cavity through the end cover 502, and the end cover 502 and the fixed scroll 201 are sealed through a high-low pressure separation sealing ring 206.
The compression mechanism 2 in the present embodiment includes a fixed scroll 201 and an orbiting scroll 202, the orbiting scroll 202 is provided between the fixed scroll 201 and a bracket 401, is connected to an eccentric sleeve 404 through a drive bearing 203, and a crank pin 403 is inserted into an eccentric hole of the eccentric sleeve 404, thereby driving the orbiting scroll 202. On the other hand, an anti-rotation mechanism consisting of 6 groups of anti-rotation wear-resistant steel rings 204 and anti-rotation positioning pins 406 is arranged on the movable vortex plate 202, wherein the anti-rotation wear-resistant steel rings 204 are arranged on hole sites on the movable vortex plate 202, and the anti-rotation positioning pins 406 are pressed into the bracket 401 in an interference manner and rigidly connected; and the difference between the inner diameter of the anti-rotation wear-resistant steel ring 204 and the diameter of the anti-rotation positioning pin 407 is 2 times of the turning radius R. The anti-rotation mechanism corresponds to a parallel four-bar mechanism in which the orbiting scroll 202 corresponds to a bar, and thus the orbiting scroll 202 performs an orbital translation without rotation.
Under the constraint of the anti-rotation mechanism, the movable scroll 202 revolves around the center of the fixed scroll 201, and makes revolution and translation without rotation with the radius of revolution as R. The fixed scroll 201 and the movable scroll 202 are provided with spiral teeth, the two spiral teeth are formed by conjugate molded lines and can be meshed with each other to form a crescent compression cavity 11, the compression cavity 11 continuously moves towards the center under the action of the transmission driving mechanism 4 and the anti-rotation mechanism, the volume is continuously reduced, the pressure in the compression cavity 11 is continuously compressed, and the vortex pump body continuously sucks air, compresses and discharges air.
Under the suction action of the compression mechanism 2, refrigerant enters the suction side region 10 of the scroll compressor from the suction port 501a connected to the evaporator outlet of the air conditioning system, passes through and cools the motor assembly 3, and is then sucked into the suction chamber formed by the orbiting scroll 202 and the fixed scroll 201 in the wrap engagement, while a portion of the refrigerant oil present on the suction side is also sucked into the compression chamber and lubricates, seals and cools the compression mechanism 2. As the crankshaft 402 rotates, the suction chamber is closed and begins to compress into the compression chamber 11, and the compression chamber 11 gas continues to be compressed to a certain pressure, is discharged through the central exhaust hole 201a of the fixed scroll 201, enters the discharge side area 12, is discharged from the exhaust port 502a, and then enters the system condenser. On the other hand, the mixture of the refrigerant and the refrigerant oil at the intermediate pressure in the compression chamber 11 is introduced into the intermediate pressure back pressure chamber 13 through the back pressure chamber guide intermediate pressure passage 202a, and enters the closed area formed by the bracket 401, the shaft seal 702, the orbiting scroll 202, and the intermediate pressure chamber seal 205. The refrigerant and the refrigerating oil mixture with the intermediate pressure in the intermediate pressure back pressure cavity 13 generate back pressure on the one hand on the movable scroll 202 and push the back pressure to and cling to the fixed scroll 201 so as to realize axial sealing of the scroll pump body; on the other hand, the refrigeration oil lubricates and cools each friction pair in the medium-pressure back pressure cavity.
As shown in fig. 1 to 10, the fixed scroll 201 in the present embodiment is provided with a mounting hole 201e, and the bottom of the mounting hole 201e is provided with an enthalpy increasing port 201b communicating the mounting hole 201e with the compression chamber 11; the enthalpy increasing check assembly 6 comprises a check valve 601, an elastic element 602 and an enthalpy increasing channel 502c, wherein the enthalpy increasing channel 502c is connected with the mounting hole 201e during mounting, the check valve 601 is mounted in the mounting hole 201e, the elastic element 602 abuts against the bottom of the check valve 601 and the bottom of the mounting hole 201e, and the check valve 601 reciprocates in the mounting hole 201e to open or close the enthalpy increasing channel 502 c.
Preferably, the scroll compressor in this embodiment further includes a buffering structure provided at least one of opposite sides of the check valve 601 to prevent the check valve 601 from striking the enthalpy increasing passage 502c and the fixed scroll 201 during the reciprocating movement.
Because the scroll compressor in this embodiment is provided with buffer structure, through this buffer structure's effect, when check valve 601 reciprocating motion's in mounting hole 201e in-process, can effectively prevent to take place to strike between check valve 601 and enthalpy increasing passageway 502c and the vortex quiet vortex dish 201, and then protect check valve 601, prevent that check valve 601 from appearing the terminal surface sunken or check valve from stopping the cracked phenomenon of countercurrent seal terminal surface because of repeatedly opening or closing enthalpy increasing passageway 502 c. Meanwhile, noise in the using process of the scroll compressor can be reduced, and reliability of the scroll compressor is improved.
The check valve 601 in the present embodiment includes a check valve cutoff reverse flow sealing end face 601d, a diversion passage 601a, and a flange 601b, the diversion passage 601a penetrating the check valve 601; the flange 601b is surrounded on the outer periphery of the check valve stop reverse flow sealing end face 601d, a first buffer containing cavity 502d is arranged on the outer periphery of the enthalpy increasing channel 502c, and a groove matched with the flange 601b is formed on the inner wall of the first buffer containing cavity 502d and the inner wall of the mounting hole 201 e.
When the check valve 601 in this embodiment closes the enthalpy increasing channel 502c, the central portion of the check valve cut-off countercurrent sealing end face 601d just seals the outlet of the enthalpy increasing channel 502c, and then closes the enthalpy increasing channel 502c, when the check valve 601 opens the enthalpy increasing channel 502c, the check valve cut-off countercurrent sealing end face 601d moves towards the direction away from the enthalpy increasing channel 502c, and then opens the enthalpy increasing channel 502c, at this time, the refrigerant entering the mounting hole 201e from the enthalpy increasing channel 502c can pass through the diversion channel 601a, and then enters the compression cavity 11 from the enthalpy increasing port 201b, so as to realize air supplementing and enthalpy increasing operation.
Preferably, the flange 601b in this embodiment is an annular flange, and correspondingly, the first buffer cavity at the outer periphery of the enthalpy-increasing air supplementing pipe is an annular buffer cavity.
The buffer structure includes a first orifice 502e, where the first orifice 502e is disposed on a side wall of the enthalpy increasing channel 502c and communicates the first buffer cavity with a tube hole of the enthalpy increasing channel 502 c. When the enthalpy-increasing and air-supplementing pressure Pm is less than or equal to the pressure Pi of the compression cavity 11, under the action of the elastic element 602, the check valve 601 moves towards the direction close to the enthalpy-increasing and air-supplementing pipe, so that the check valve is closed to close the enthalpy-increasing and air-supplementing pipe, and the check valve 601 achieves the purpose of preventing backflow by sealing. Therefore, the clearance volume of the air-filling compression cavity can be reduced, the refrigerant in the compression cavity 11 can be prevented from flowing back into the enthalpy-increasing passage containing cavity for thermal expansion, and the problems of increased power consumption, reduced energy efficiency and the like of the scroll compressor are avoided.
In the process of the check valve 601 moving towards the enthalpy increasing channel 502c, as the first throttling hole 502e is arranged on the side wall of the enthalpy increasing channel 502c and is communicated with the first buffering cavity and the pipe hole of the enthalpy increasing channel 502c, the first buffering cavity and the flange 601b arranged on the check valve 601 can form a compression cavity, the first throttling hole 502e is communicated with the pipe hole of the enthalpy increasing channel 502c, the check valve 601 can play a buffering role in the process of moving towards the enthalpy increasing channel 502c, the check valve 601 is prevented from moving towards the enthalpy increasing channel 502c rapidly to impact the enthalpy increasing channel 502c, the service life of the check valve 601 is prolonged, and noise of the scroll compressor is reduced.
Preferably, the bottom of the mounting hole 201e in the present embodiment is provided with a second buffer accommodating cavity 201c, the check valve 601 further includes a boss 601c, the boss 601c is disposed on a side of the check valve stop reverse flow sealing end face 601d away from the flange 601b, and the boss 601c extends to the second buffer accommodating cavity 201c; the buffer structure further includes a second orifice 201d, and the second orifice 201d communicates the second buffer volume 201c with the compression chamber 11. When the enthalpy-increasing and air-supplementing pressure Pm is greater than the pressure Pi in the compression chamber 11, under the action of the pressure difference at two sides of the check valve 601, the check valve 601 is pushed to move towards the fixed scroll 201 side against the resistance (including the acting force of the elastic element 602, the acting force generated by the second buffer containing chamber 201c and the friction force), the enthalpy-increasing channel 502c is opened, and the refrigerant enters the channel formed between the mounting hole 201e, the flow guiding channel 601a, the boss 601c and the elastic element 602 through the end cover enthalpy-increasing channel 502c and is injected into the compression chamber 11 through the enthalpy-increasing port 201b on the fixed scroll 201, so as to complete the injection enthalpy-increasing and air-supplementing.
In the process of opening the enthalpy increasing channel 502c, through the action of the second buffer containing cavity 201c and the second structural hole 201d, a buffer effect can be achieved in the process of moving the check valve 601 to the movable scroll 202, the check valve 601 is prevented from rapidly moving towards the bottom of the mounting hole 201 to impact the fixed scroll 201, the service life of the check valve 601 is prolonged, and noise of the scroll compressor is reduced.
The enthalpy increasing channel 502c and the mounting hole 201e in this embodiment are sealed by a sealing ring 603, and when in actual mounting, an enthalpy increasing sealing ring groove 502f is formed in the periphery of the enthalpy increasing channel 502c, and when in mounting, the sealing ring 603 is mounted in the enthalpy increasing sealing ring groove 502f, and then the enthalpy increasing channel 502c is mounted in the mounting hole 201 e.
Preferably, the casing 5 in this embodiment includes a casing 501 and an end cover 502 covered at the end of the casing 501, where the end cover 502 is located at the side of the fixed scroll 201, and the enthalpy increasing channel 502c and the end cover 502 are integrally formed, so that the structure is compact and the stability is high.
Of course, in other embodiments of the present invention, the enthalpy increasing channel 502c may be provided as a single pipe or be provided together with the fixed scroll 201, and any other modification forms under the concept of the present invention are within the scope of the present invention.
When specifically designing, mounting hole 201e in this embodiment extends along the axial of quiet vortex dish 201, and the axial of end cover 502 is provided with increases enthalpy channel 502c, and the radial of end cover 502 is provided with increases enthalpy pipe connection mouth 502b with increasing enthalpy channel 502c intercommunication, increases enthalpy channel 502c and is connected with mounting hole 201e, simple structure, the equipment of being convenient for and processing.
Preferably, the enthalpy increasing check assembly 6 is one, two or more, and the enthalpy increasing check assembly 6 is arranged along the circumferential direction of the fixed scroll 201.
Preferably, the elastic element 602 in the present embodiment is a spring, however, in other embodiments of the present invention, the elastic element 602 may be provided as an elastic structure such as a rubber pad or a rubber ring, and other modifications are within the scope of the present invention.
Referring again to fig. 1 to 10, the specific process of the injection enthalpy-increasing check flow-preventing method of the present invention is as follows: the enthalpy-increasing check assembly 6 is disposed in a mounting hole 201e formed in the fixed scroll 201, and includes a check valve 601, an elastic element 602, an enthalpy-increasing channel 502c, a sealing ring 603, and the like. The enthalpy-increasing channel 502c is integrally arranged with the end cover 502, and comprises an enthalpy-increasing pipe connection port 502b and the enthalpy-increasing channel 502c, wherein the enthalpy-increasing pipe connection port 502b is connected with an economizer or a flash tank outlet of the air conditioning system through a connecting pipe; the enthalpy increasing channel 502c is inserted into a mounting hole 201e formed in the fixed scroll 201, and is isolated from the high-pressure gas in the exhaust side area 12 by a sealing ring 603, so that the enthalpy increasing channel is sealed. The check valve 601 includes a diversion channel 601a, a flange 601b, a boss 601c, and a check valve shut-off reverse flow sealing end face 601d.
As shown in fig. 9, when the enthalpy-increasing pressure Pm is greater than the compression chamber pressure Pi, under the action of the pressure difference at both sides of the check valve 601, the check valve 601 is pushed to move toward the fixed scroll 201 side against the resistance (including the acting force of the elastic element 602, the acting force of the second buffer chamber 201c and the friction force), the check valve is opened, and the refrigerant enters the mounting hole 201e, the flow guide channel 601a, the channel formed between the boss 601c and the elastic element 602 through the enthalpy-increasing channel 502c, and is injected into the compression chamber 11 through the enthalpy-increasing port 201b, so as to complete the injection enthalpy-increasing air supplement.
As shown in fig. 10, when the enthalpy-increasing pressure Pm is less than or equal to the pressure Pi of the compression chamber 11, under the action of the elastic element 602, the check valve 601 is pushed to move toward the end cover 501, so that the check valve cut-off countercurrent sealing end face 601d is attached to the check sealing end face 502g provided on the enthalpy-increasing channel 502c, and the enthalpy-increasing channel 502c is in a completely closed state, so as to achieve the purpose of sealing to prevent backflow. Therefore, the clearance volume of the air-filling compression cavity can be reduced, and the refrigerant in the compression cavity 11 can be prevented from flowing back into the enthalpy-increasing passage containing cavity for thermal expansion, so that the problems of increased power consumption, reduced energy efficiency and the like of the compressor are avoided.
Again with reference to fig. 1 to 10, the present invention provides for the realization of the damping action of the injection enthalpy-increasing check valve. The second buffer chamber 201c and the second orifice 201d are provided in the mounting hole 201e of the fixed scroll 201. The second buffer volume 201c and the boss 601c provided on the check valve 601 may form a compression volume, and the second orifice 201d communicates the second buffer volume 201c with the compression chamber 11. Similarly, a first buffer chamber and a first orifice 502e are formed at the end cap 502 and the connection port of the fixed scroll 201. The first buffer capacity and the flange 601b provided on the check valve 601 may form a compression capacity, and the first orifice 502e communicates the first buffer capacity with the enthalpy increasing passage 502 c.
When the system is opened to supplement air and increase enthalpy, the enthalpy-increasing check assembly 6 enters an opening process from a fully closed state (as shown in fig. 9) and then enters a fully opened state (as shown in fig. 7) under the action of pressure difference (Pm & gt Pi) on both sides of the check valve 601. The check valve 601 rapidly moves toward the fixed scroll 201 side, and simultaneously the volume of the first buffer volume increases rapidly, the volume of the internal gas expands and the gas in the enthalpy increasing channel 502c cannot be timely supplemented into the first buffer volume due to the throttling and pressure limiting effects of the first throttling 502e, so the pressure of the gas in the first buffer volume 502d decreases rapidly. As the gas pressure in the first buffer volume drops rapidly, the resultant force acting on the check valve 601 to move toward the fixed scroll 201 side is reduced, so that the movement speed of the check valve 601 is slowed down.
When the check valve 601 moves to close the second buffer volume 201c, the check valve 601 continues to move toward the fixed scroll 201 side rapidly, and the boss 601c compresses the second buffer volume 201c, and the gas in the second buffer volume 201c is not discharged in time due to the action of the second orifice 201d, so that the gas pressure in the second buffer volume 201c rises rapidly. Similarly, since the gas pressure in the second buffer volume 201c increases rapidly, the resultant force acting on the check valve 601 to move toward the fixed scroll 201 side is reduced to slow down the movement speed of the check valve 601. Therefore, under the action of the first buffer volume, the second buffer volume 201c or both, the air pressure in the area where the flange 601b and the boss 601c of the check valve 601 are located is reduced or increased due to the suction or compression action of the check valve 601 on the first buffer volume and the second buffer volume 201c, so as to generate a buffer action on the check valve 601; and the magnitude of the buffering action is directly related to the moving speed of the check valve 601, that is, the faster the impact speed of the check valve 601 moves, the more remarkable the buffering action is; when the impact velocity of the movement of the check valve 601 is small, the cushioning effect is also small. Thus, the check valve 601 is ensured to reliably and timely finish the opening or closing action of the enthalpy increasing channel 502c, and the problems of deformation and depression of the limiting end surface or fracture of the check valve stop countercurrent sealing end surface, the reliability and noise of the scroll compressor induced by the check valve 601 are avoided.
Similarly, as shown in fig. 10, when the system is closed to supply air and increase enthalpy, under the action of the pressure difference (Pi > Pm) on both sides of the check valve 601, the check valve 601 moves rapidly toward the end cover 502 side, the second buffer chamber 201c increases its gas pressure to decrease, the first buffer chamber is compressed to increase its gas pressure, and the gas pressure in the area where the flange 601b and the boss 601c of the check valve 601 are located increases or decreases, so as to generate the same buffer effect on the check valve 601 as described above.
On the other hand, regardless of whether the air extraction system is on or off, since the pressure Pi in the compression chamber 11 rotates with the crankshaft 402, the pressure Pi will be at Pi/u min ～Pi_ max The pressure range varies periodically and typically Pm is between Pi/u min And Pi/u max Between them. Accordingly, the direction and magnitude of the pressure difference across the check valve 601 are periodically changed such that the check valve 601 periodically reciprocates. At this time, under the action of the above-mentioned buffer structure, the impact speed between the check valve 601 and the enthalpy increasing channel 502c can be effectively reduced, and even the impact between them can be completely avoided, so that the problems of deformation and depression of the limiting end surface or breakage of the valve body, and the reliability and noise of the compressor induced by the valve body are avoided.
According to another aspect of the present invention, there is provided an air conditioning system including a scroll compressor, which is the scroll compressor in the above-described embodiment.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
according to the scroll compressor, the enthalpy-increasing check component with the buffer function is arranged in the enthalpy-increasing channel, so that the check function is realized, and the problems of reliability and noise of the compressor caused by reciprocating impact of the check valve are avoided. On the one hand, the check valve refrigerant circulation channel is disconnected and located its transverse plane intermediate position, and is close to the fixed scroll side and set up the flange and keep away to let the fixed scroll increase the enthalpy air supplement pipe to form the passageway and increase the enthalpy air supplement pipe intercommunication, and realize one-way non return and prevent against the flow. On the other hand, the flange on the check valve is used for forming a compression cavity with the fixed scroll and the first buffer cavity, and the flange corresponds to the second throttling hole to play roles of throttling, pressure limiting and delay balance pressure. Therefore, in the process of the quick reciprocating motion of the check valve, when the flange and the fixed scroll or the first buffer containing cavity form a seal, the suction or compression effect can be generated on the internal gas, and at the moment, the pressure of the gas in the first buffer containing cavity is reduced or increased due to the effect of the throttling and the pressure limiting of the first throttling hole, so that the check valve is buffered; and the buffer effect can be adaptively changed along with the impact speed of the check valve, and the faster the impact speed of the check valve is, the more obvious the buffer effect is.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A scroll compressor comprising:
the shell (5), the said shell (5) encloses and forms the installation cavity;
the compression mechanism (2), the compression mechanism (2) comprises a fixed scroll (201) and an movable scroll (202), the fixed scroll (201) and the movable scroll (202) are meshed with each other to form a compression cavity (11), a mounting hole (201 e) is formed in the fixed scroll (201), and an enthalpy increasing port (201 b) which is communicated with the mounting hole (201 e) and the compression cavity (11) is formed in the bottom of the mounting hole (201 e);
enthalpy increasing check assembly (6), enthalpy increasing check assembly (6) includes check valve (601), elastic element (602) and increases enthalpy channel (502 c), increase enthalpy channel (502 c) with mounting hole (201 e) are connected, check valve (601) are installed in mounting hole (201 e), elastic element (602) is abutted between the bottom of check valve (601) and mounting hole (201 e), check valve (601) are in reciprocating motion in order to increase enthalpy channel (502 c) open or close in mounting hole (201 e). Characterized in that the scroll compressor further comprises:
at least one of two opposite sides of the check valve (601) is provided with a buffer structure to prevent the check valve (601) from impacting the enthalpy increasing channel (502 c) and the fixed scroll (201) in the process of reciprocating movement;
a first buffer containing cavity (502 d) is arranged on the periphery of the enthalpy increasing channel (502 c);
the buffering structure comprises a first throttling hole (502 e), wherein the first throttling hole (502 e) is arranged on the side wall of the enthalpy increasing channel (502 c) and is communicated with the first buffering containing cavity and the pipe hole of the enthalpy increasing channel (502 c).
2. The scroll compressor of claim 1, wherein the check valve (601) comprises:
a check valve cut-off reverse flow sealing end face (601 d);
-a diversion channel (601 a), the diversion channel (601 a) extending through the check valve (601);
the flange (601 b), the flange (601 b) encloses and is established check valve stop reverse flow sealing end face (601 d) outer periphery, first buffering appearance chamber (502 d) with the inner wall of mounting hole (201 e) encloses and establishes the recess that forms with flange (601 b) looks adaptation.
3. The scroll compressor of claim 2, wherein the flange (601 b) is an annular flange (601 b) and the first buffer volume is an annular buffer volume.
4. The scroll compressor according to claim 2, wherein a second buffer chamber (201 c) is provided at the bottom of the mounting hole (201 e), the check valve (601) further comprises a boss (601 c), the boss (601 c) is provided at a side of the check valve cut-off reverse flow sealing end surface (601 d) away from the flange (601 b), and the boss (601 c) is adapted to the second buffer chamber (201 c).
5. The scroll compressor of claim 4, wherein the cushioning structure further comprises a second orifice (201 d), the second orifice (201 d) communicating the second cushioning volume (201 c) with the compression volume (11).
6. The scroll compressor of claim 1, wherein the resilient element (602) is a spring.
7. The scroll compressor according to any one of claims 1 to 6, wherein the enthalpy increasing channel (502 c) is sealed with the mounting hole (201 e) by a sealing ring (603).
8. The scroll compressor according to any one of claims 1 to 6, wherein the housing (5) comprises a shell (501) and an end cover (502) covering an end of the shell (501), the end cover (502) is located at a side surface of the fixed scroll (201), and the enthalpy increasing channel (502 c) is integrally formed with the end cover (502).
9. The scroll compressor according to claim 8, wherein the mounting hole (201 e) extends along an axial direction of the fixed scroll (201), the end cover (502) is axially provided with the enthalpy increasing channel (502 c), the end cover (502) is radially provided with an enthalpy increasing pipe connection port (502 b) communicated with the enthalpy increasing channel (502 c), and the enthalpy increasing channel (502 c) is connected with the mounting hole (201 e).
10. The scroll compressor according to any one of claims 1 to 5, wherein the enthalpy increasing check assembly (6) is one, two or more than two; when the enthalpy-increasing check assembly (6) is two or more, the enthalpy-increasing check assembly (6) is arranged at intervals along the fixed scroll (201).
11. An air conditioning system comprising a scroll compressor, wherein the scroll compressor is the scroll compressor of any one of claims 1 to 10.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710788797.XA CN107620705B (en) | 2017-09-04 | 2017-09-04 | Scroll compressor and air conditioning system |
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| CN201710788797.XA CN107620705B (en) | 2017-09-04 | 2017-09-04 | Scroll compressor and air conditioning system |
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| CN107620705B true CN107620705B (en) | 2023-07-14 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018201581A1 (en) * | 2018-02-01 | 2019-08-01 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Electromotive refrigerant compressor |
| CN109253088A (en) * | 2018-11-09 | 2019-01-22 | 珠海凌达压缩机有限公司 | A kind of air-supplying enthalpy-adding device and screw compressor |
| CN109372753B (en) * | 2018-12-10 | 2023-10-03 | 珠海格力节能环保制冷技术研究中心有限公司 | Check valve assembly, compressor and air conditioner |
| WO2020118581A1 (en) * | 2018-12-12 | 2020-06-18 | 安徽省大富智能空调技术有限公司 | Compressor and air-conditioning system and automobile applying same |
| CN111852852A (en) * | 2019-04-26 | 2020-10-30 | 艾默生环境优化技术(苏州)有限公司 | Scroll compressor |
| CN110131171B (en) * | 2019-06-12 | 2024-03-15 | 安徽省锦瑞汽车部件有限公司 | Air supplementing enthalpy increasing component and scroll compressor for new energy automobile |
| CN111365872A (en) * | 2020-04-13 | 2020-07-03 | 浙江工业大学 | Scroll compressor and refrigeration/heat pump system adopting same |
| CN112576501B (en) * | 2020-12-03 | 2023-01-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner |
| CN114962260B (en) * | 2022-05-30 | 2024-04-09 | 珠海凌达压缩机有限公司 | Compressor and compressor air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100353103C (en) * | 2004-11-18 | 2007-12-05 | 中国核动力研究设计院 | Full flow buffer check valve |
| JP2009162123A (en) * | 2008-01-08 | 2009-07-23 | Panasonic Corp | Refrigerating cycle device and fluid machine used for the same |
| JP5393188B2 (en) * | 2009-02-12 | 2014-01-22 | 三菱重工業株式会社 | Refrigeration system and scroll compressor |
| CN106704178B (en) * | 2015-08-18 | 2018-11-30 | 珠海格力节能环保制冷技术研究中心有限公司 | Screw compressor and its pressure release flow guiding structure |
| CN107061292B (en) * | 2017-06-16 | 2019-12-24 | 珠海格力电器股份有限公司 | Check valve and scroll compressor with same |
| CN207195177U (en) * | 2017-09-04 | 2018-04-06 | 珠海格力电器股份有限公司 | Screw compressor and air-conditioning system |
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