Rotary compressor, air conditioner

Abstract

This invention provides a rotary compressor and an air conditioner. The rotary compressor includes: a cylinder having a accommodating cavity and a vane groove communicating with the accommodating cavity; a roller located within the accommodating cavity; a vane slidably disposed within the vane groove, with the head end of the vane abutting against the outer peripheral wall of the roller; and an elastic compression cap disposed at the tail end of the vane. The elastic compression cap includes a force-applying head and has an extended state (extended to allow the force-applying head to contact the tail end) and a retracted state (retracted to disengage the force-applying head from the tail end). The elastic compression cap can switch from the extended state to the retracted state under the action of a pressure difference between its inner and outer sides, and can also switch from the retracted state to the extended state under the action of its own elasticity. During normal operation, the elastic compression cap of this invention disengages from the roller, resulting in no frictional or compression power consumption between them, and ensuring normal operation of the compressor during startup and during liquid intake.

Description

Technical Field

[0001] This invention belongs to the field of compressor design technology, specifically relating to a rotary compressor and an air conditioner. Background Technology

[0002] In a rotary compressor, the purpose of the spring is to apply force to the tail end of the vane to provide the vane with a force that fits against the roller, ensuring that the vane and the roller fit together, so that the sealed area of ​​the compressor cavity inside the compressor cylinder can be formed.

[0003] During the initial startup of the compressor, the back of the vane is stressed, ensuring that the vane and roller are in contact. Thus, after the compressor starts running, the vane, under the combined force of pressure difference and other forces, repeatedly moves against the roller. During this operation, the compressor can function normally without a spring. However, without the aforementioned spring, after the compressor stops or when liquid is carried in the suction, the force on the back of the vane (i.e., the tail end) is insufficient to keep the vane and roller in contact, leading to separation and compressor failure. Therefore, existing rotary compressors have springs at the tail end of the vane to ensure a tight fit between the vane and roller in all compressor states. As mentioned earlier, during normal compressor operation, the vane can objectively achieve a tight fit with the roller through its high tail pressure (i.e., back pressure). At this time, the spring still acts on the tail end of the vane, and the crankshaft needs to compress the spring during rotation, increasing the compressor's power consumption. Simultaneously, the roller's translational motion needs to overcome significant friction, further increasing power consumption. If the existing spring is removed, the compressor will fail after stopping or when liquid is carried in the suction. Summary of the Invention

[0004] Therefore, the present invention provides a rotary compressor and an air conditioner that can solve the technical problems in the prior art where the power consumption is large when a spring is set at the tail end of the vane in the rotary compressor during normal operation, and the compressor fails after the compressor stops or when liquid is carried in the suction when no spring is set.

[0005] To address the above problems, the present invention provides a rotary compressor, comprising:

[0006] A cylinder having a receiving cavity and a sliding vane groove communicating with the receiving cavity;

[0007] The roller is located within the accommodating cavity;

[0008] A sliding plate is slidably disposed in the sliding plate groove, and the head end of the sliding plate is in contact with the outer peripheral wall of the roller;

[0009] The rotary compressor also includes:

[0010] An elastic compression cap is disposed at the tail end of the slider. The elastic compression cap includes a force-applying head. The elastic compression cap has an extended state in which the force-applying head contacts the tail end and a retracted state in which the force-applying head disengages from the tail end. The elastic compression cap can switch from the extended state to the retracted state under the action of the pressure difference between its inner and outer sides. The elastic compression cap can also switch from the retracted state to the extended state under the action of its own elasticity.

[0011] In some implementations...

[0012] The space on the side of the elastic compression cap closest to the slide plate is connected to the exhaust passage of the compressor, and the space on the side of the elastic compression cap furthest from the slide plate is connected to the intake passage of the compressor.

[0013] In some implementations...

[0014] The exhaust passage includes the inner cavity of the compressor housing, and the vane groove communicates with the inner cavity of the housing; and / or,

[0015] The intake channel includes an intake channel constructed on the cylinder. A connecting flow channel is also constructed inside the cylinder. One end of the connecting flow channel is connected to the intake channel, and the other end of the connecting flow channel is connected to the side of the elastic compression cap away from the slide plate.

[0016] In some implementations...

[0017] The connecting channel extends in a straight line from the side of the air intake channel near the elastic compression cap to the side away from the elastic compression cap. A first opening is formed on the wall of the air intake channel on the side away from the elastic compression cap, and a first sealing element is installed in the first opening to seal it.

[0018] In some implementations...

[0019] The sliding vane groove has a mounting hole at one end away from the roller. The elastic compression cap is assembled in the mounting hole. The mounting hole has a second opening on the outer peripheral wall of the cylinder. A second sealing element is installed in the second opening to seal it.

[0020] In some implementations...

[0021] The elastic compression cap also has a connecting cylinder, and there is a foldable thin-walled body between the connecting cylinder and the force-applying head. The hollow area formed by the thin-walled body and the connecting cylinder is connected to the connecting channel. The elastic compression cap is connected to the inner wall of the mounting hole via the connecting cylinder.

[0022] In some implementations...

[0023] The connecting cylinder is interference-fitted with the inner wall of the mounting hole.

[0024] In some implementations...

[0025] The area on the side of the elastic compression cap away from the slider can form a negative pressure under the action of the airflow in the air intake channel.

[0026] In some implementations...

[0027] The position where the force-applying head contacts the tail end of the slide is at the middle position of the slide in the axial direction of the roller.

[0028] The present invention also provides an air conditioner including the above-described rotary compressor.

[0029] The rotary compressor and air conditioner provided by this invention have the following beneficial effects:

[0030] The invention replaces the helical spring in the existing rotary compressor with an elastic compression cap. The elastic compression cap has an extended state where the force-applying head contacts the tail end, and a retracted state where the force-applying head disengages from the tail end. During normal operation, the elastic compression cap is in the retracted state, meaning it is out of contact with the rollers, resulting in no frictional or compression power consumption, thus reducing the power consumption of the rotary compressor. It is understood that the tail end of the vane is under higher pressure (i.e., the pressure outside the elastic compression cap). When the rotary compressor starts after shutdown or during operation and liquid is carried in during suction, the elastic compression cap is in the extended state, applying force to the tail end of the vane to make it adhere to the outer peripheral wall of the rollers. This ensures a relative seal between the suction chamber and the compression chamber within the compressor, thereby guaranteeing normal operation and making the compressor more reliable.

[0031] The outer side of the elastic compression cap is connected to the compressor's exhaust passage, while the inner side is connected to the intake passage. During normal operation of the compressor, the exhaust passage is a high-pressure gas source, while the intake passage is a low-pressure gas source. In this way, the pressure difference between the inner and outer sides of the elastic compression cap can be achieved by utilizing the compressor's own operating rules during operation, without the need to separately configure corresponding high-pressure and low-pressure gas sources, or separately set up corresponding switching components. This simplifies the structural design, reduces control difficulty, and lowers manufacturing costs.

[0032] The area on the side of the elastic compression cap away from the slider can form a negative pressure under the action of the airflow in the air intake channel, which can increase the pressure difference between the inner and outer sides of the elastic compression cap and improve the flexibility of the elastic compression cap in switching states. Attached Figure Description

[0033] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0034] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0035] Figure 1 This is a schematic diagram of the internal structure of a compressor according to an embodiment of the present invention. The elastic compression cap in the diagram is in the extended state (when the compressor is started after being stopped or when it is sucking in liquid during operation).

[0036] Figure 2 This is a schematic diagram of the internal structure of a compressor according to an embodiment of the present invention. The elastic compression cap in the figure is either in an extended state, or in a retracted state where the sliding vane applies force to the elastic compression cap when the compressor is started after being stopped, or in a retracted state caused by pressure difference fluctuations due to liquid carryover during compressor operation.

[0037] Figure 3 This is a schematic diagram of the internal structure of a compressor according to an embodiment of the present invention. In the diagram, the elastic compression cap is in a retracted state, and the compressor is in a normal operating state in this state.

[0038] Figure 4 This is a cross-sectional view of the elastic compression cap in an embodiment of the present invention;

[0039] Figure 5 for Figure 4 Top view of a medium-elasticity compression cap;

[0040] Figure 6 for Figure 4 A three-dimensional structural diagram of a medium-elasticity compression cap.

[0041] The reference numerals in the attached figures are as follows:

[0042] 1. Cylinder; 11. Receiving cavity; 12. Sliding vane groove; 13. Intake passage; 14. Connecting flow channel; 15. First sealing element; 16. Second sealing element; 17. Exhaust port;

[0043] 2. Roller;

[0044] 3. Slider;

[0045] 4. Elastic compression cap; 41. Force-applying head; 42. Connecting cylinder; 43. Thin-walled body. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0048] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0053] See also Figure 1 and Figure 6 As shown, according to an embodiment of the present invention, a rotary compressor is provided, comprising:

[0054] Cylinder 1, wherein the cylinder 1 is configured with a receiving cavity 11 and a sliding groove 12 communicating with the receiving cavity 11;

[0055] Roller 2 is located within the receiving cavity 11 and is driven to operate by a rotating crankshaft (not shown in the figure);

[0056] The slide plate 3 is slidably disposed in the slide plate groove 12, that is, the slide plate 3 is located in the slide plate groove 12 and can be driven to reciprocate linearly in the guiding direction of the slide plate groove 12. The head end of the slide plate 3 is in contact with the outer peripheral wall of the roller 2 to divide the aforementioned accommodating cavity 11 into a relatively independent air intake cavity and a compression cavity.

[0057] Unlike existing rotary compressors, the rotary compressor of this invention further includes an elastic compression cap 4, which is disposed at the tail end of the vane 3. The elastic compression cap 4 includes a force-applying head 41. The elastic compression cap 4 has an extended state in which the force-applying head 41 contacts the tail end and applies force, and a retracted state in which the force-applying head 41 disengages from the tail end. The elastic compression cap 4 can switch from the extended state to the retracted state under the action of its internal and external pressure difference. The elastic compression cap 4 can also switch from the retracted state to the extended state under the action of its own elastic force (also known as elastic restoring force). The aforementioned internal and external pressure difference refers to the inner side of the body of the elastic compression cap 4 and the outer side of the body. Figure 1 As shown for reference, the inner side of the body is the side furthest from roller 2, and the outer side is the side closest to roller 2. It should be noted that when the aforementioned elastic compression cap 4 is in the extended state, it does not mean that the elastic compression cap 4 does not bear the pressure difference between its inner and outer sides. Rather, it is because the magnitude of the pressure difference between the inner and outer sides is less than the magnitude of the elastic force of the elastic compression cap 4 itself. That is, the pressure difference between the inner and outer sides in this state may be zero (e.g., when the compressor has just started and no pressure difference has been established), or it may be a small pressure difference (e.g., due to liquid carryover during compressor operation). Similarly, when the aforementioned elastic compression cap 4 is in the retracted state, it does not mean that the elastic compression cap 4 does not bear its own elastic force. Rather, it is because this elastic force is much smaller than the pressure difference between its inner and outer sides, for example, when the compressor is in normal operating condition.

[0058] In this technical solution, an elastic compression cap 4 is used to replace the helical spring in the existing rotary compressor. Because the elastic compression cap 4 in this invention has an extended state where the force-applying head 41 contacts the tail end and a retracted state where the force-applying head 41 disengages from the tail end, the elastic compression cap 4 is in the retracted state during normal operation of the rotary compressor, meaning it is out of contact with the roller 2. There is no frictional or compression power consumption between them, thus reducing the power consumption of the rotary compressor. It can be understood that the tail end of the vane 3 is under higher pressure (i.e., the pressure outside the elastic compression cap 4). When the rotary compressor is started after shutdown or during operation and suction liquid is carried in, the elastic compression cap 4 is in the extended state, thus applying force to the tail end of the vane 3 to make it fit against the outer peripheral wall of the roller 2. This ensures a relative seal between the suction chamber and the compression chamber inside the compressor, thereby ensuring normal operation of the compressor and making its performance more reliable.

[0059] It is understandable that the aforementioned pressure difference can be formed in various ways. For example, it can be achieved by using an appropriate external high-pressure gas source and an external low-pressure gas source to controllably connect to the outer and inner sides of the elastic compression cap 4, thereby enabling controllable switching of its state.

[0060] In a preferred embodiment, the space on the side of the elastic compression cap 4 closest to the slide plate 3 is connected to the exhaust passage of the compressor, and the space on the side of the elastic compression cap 4 furthest from the slide plate 3 is connected to the intake passage of the compressor. It is understood that the exhaust passage is connected to the exhaust port 17, while the intake passage is connected to the corresponding intake port.

[0061] In this technical solution, the outer side of the elastic compression cap 4 is connected to the compressor's exhaust channel, while the inner side is connected to the suction channel. During normal compressor operation, the exhaust channel is a high-pressure gas source, while the suction channel is a low-pressure gas source. Thus, during compressor operation, the pressure difference between the inner and outer sides of the elastic compression cap 4 can be achieved using the compressor's own operating characteristics, without the need for separate high-pressure and low-pressure gas sources or separate switching components. This simplifies the structural design, reduces control difficulty, and lowers manufacturing costs. Specifically, during normal compressor operation, the pressure difference between the exhaust and suction pressures is sufficiently large, causing the elastic compression cap 4 to retract and disengage from the roller 2. However, when liquid is carried in during compressor operation, the liquid cannot be compressed, resulting in a lower exhaust pressure and a smaller pressure difference between the exhaust and suction pressures. The exhaust pressure is insufficient to apply force to the sliding vane 3 at its tail end, preventing it from reliably adhering to the roller 2. This causes the suction chamber and compression chamber to connect, preventing the compressor from operating normally. At this time, the elastic compression cap... The cap 4 can switch to the extended state under its own elastic force. The extended elastic compression cap 4 applies force to the tail end of the vane 3, so that the vane 3 can fit against the roller 2, and the compressor can operate normally. Similarly, when the compressor stops and restarts, the difference between the discharge pressure and the suction pressure is very small or even zero. The elastic compression cap 4 can switch to the extended state under its own elastic force. The extended elastic compression cap 4 applies force to the tail end of the vane 3, so that the vane 3 can fit against the roller 2, which is conducive to the normal operation of the compressor.

[0062] In one specific embodiment, the exhaust passage includes the inner cavity of the compressor housing, and the vane groove 12 communicates with the inner cavity of the housing. In this technical solution, an exhaust pipe connected to an external system is formed on the compressor housing, and the inner cavity of the housing is a transition cavity between the exhaust pipe and the exhaust port 17 of the compressor pump body assembly. By communicating the end of the vane groove 12 away from the roller 2 with the inner cavity of the housing, the high pressure of the high-pressure exhaust can be directly utilized, resulting in a simple structure.

[0063] See details Figure 1 As shown, the intake channel includes an intake channel 13 constructed on the cylinder 1. A connecting channel 14 is also constructed inside the cylinder 1. One end of the connecting channel 14 is connected to the intake channel 13, and the other end of the connecting channel 14 is connected to the side of the elastic compression cap 4 away from the slide plate 3.

[0064] In this technical solution, the arrangement of the connecting flow channel 14 allows for more flexible placement of the intake channel 13 and the sliding vane groove 12 on the cylinder 1. It is understood that by designing the flow area of ​​the connecting flow channel 14 to be smaller than that of the intake channel 13, a negative pressure zone can be formed inside the elastic compression cap 4 using the high-speed intake airflow within the intake channel 13. This increases the pressure difference between the inner and outer sides of the elastic compression cap 4, thereby improving the flexibility of the elastic compression cap 4 in switching states. In other words, the area of ​​the elastic compression cap 4 away from the sliding vane 3 can form a negative pressure under the action of the intake airflow in the intake channel 13, increasing the pressure difference between the inner and outer sides of the elastic compression cap 4 and improving the flexibility of the elastic compression cap 4 in switching states.

[0065] In a preferred embodiment, the connecting channel 14 extends in a straight line from the side of the air intake channel 13 near the elastic compression cap 4 to the side away from the elastic compression cap 4, and the connecting channel 14 has a first opening formed on the wall of the air intake channel 13 on the side away from the elastic compression cap 4. A first sealing member 15 is installed in the first opening to seal it. The first sealing member 15 may be, for example, a rubber stopper.

[0066] In this technical solution, the connecting channel 14 extends in a straight line, and its cross-section is preferably circular, so that it can be formed by drilling on the outer peripheral wall of the cylinder 1, simplifying the processing technology.

[0067] In some embodiments, the end of the slide groove 12 away from the roller 2 is formed with a mounting hole (not indicated in the figure), the elastic compression cap 4 is assembled in the mounting hole, the mounting hole has a second opening on the outer peripheral wall of the cylinder 1, and a second sealing member 16 is installed in the second opening to seal it, specifically a rubber plug.

[0068] The aforementioned mounting hole is located at the tail end of the sliding vane groove 12. The elastic compression cap 4 is assembled in the mounting hole. The mounting hole is formed by drilling on the outer peripheral wall of the cylinder 1, which simplifies the processing technology.

[0069] See details Figure 6As shown, in one specific implementation of the elastic compression cap 4, the elastic compression cap 4 further includes a connecting cylinder 42. A foldable thin-walled body 43 is located between the connecting cylinder 42 and the force-applying head 41. The hollow area formed by the thin-walled body 43 and the connecting cylinder 42 communicates with the connecting flow channel 14. The elastic compression cap 4 is connected to the inner wall of the mounting hole via the connecting cylinder 42. In a specific embodiment, any axial section of the aforementioned elastic compression cap 4 is circular. The wall thickness of the aforementioned thin-walled body 43 can be selected adaptively based on the pressure difference and its own elastic force requirements under the corresponding operating conditions, while the wall thickness of the connecting cylinder 42 is designed to be relatively larger, with the fundamental principle of ensuring reliable connection between it and the mounting hole. In a preferred embodiment, the elastic compression cap 4 can be made of rubber with high rigidity and high wear resistance.

[0070] In this technical solution, the foldable thin-walled body 43 is in a folded state, which corresponds to the retracted state of the elastic compression cap 4. The foldable thin-walled body 43 is in an extended state, which corresponds to the extended state of the elastic compression cap 4. That is, the deformation of the thin-walled body 43 realizes the switching between the aforementioned retracted state and extended state. The structure is simple and easy to implement.

[0071] The connecting cylinder 42 is interference-fitted with the inner wall of the mounting hole to ensure a reliable connection between the connecting cylinder 42 and the inner wall of the mounting hole. Specifically, in some embodiments, the outer peripheral wall of the connecting cylinder 42 is provided with a corresponding anti-detachment structure, which may be, for example, a textured pattern arranged on the outer peripheral wall of the connecting cylinder 42.

[0072] The elastic compression cap 4 can be made by one-piece injection molding of rubber, for example.

[0073] To ensure balanced force application of the elastic compression cap 4 to the slide 3, the contact position between the force-applying head 41 and the tail end of the slide 3 is located at the midpoint of the slide 3 along the axial direction of the roller 2. Specifically, the aforementioned midpoint refers to an equidistant range on both sides of the intersection of the center line of the axial length and the center line of the circumferential width of the slide 3. In actual assembly, the center of the force-applying head 41 coincides with the aforementioned intersection point.

[0074] Figure 1 H1 in the figure shows the overall length of the elastic compression cap 4 when it is in the extended state. Figure 2 H2 in the figure shows the total length of the elastic compression cap 4 when it is in the retracted state, while Figure 3 H3 in the figure shows the maximum formation of the sliding vane 3 during normal operation of the compressor, where H3 = H1 - H2.

[0075] The operating principle of the rotary compressor of the present invention is further explained below:

[0076] This invention utilizes the elasticity of the elastic compression cap 4 itself and the pressure difference after the compressor is running to apply force to the tail end of the slide plate 3 or the force disappears (i.e., the force is released).

[0077] When the compressor is running normally, the pressure difference between the suction port and the tail end of the vane groove 12 is large. The suction port is connected to the negative pressure zone (i.e., the inner side of the elastic compression cap 4, hereinafter the same) through the connecting flow channel 14. At this time, the negative pressure zone is also low pressure. The tail end of the elastic compression cap 4 is connected to the negative pressure zone, while other parts of the elastic compression cap 4 (i.e., the outer side) belong to the high pressure zone. At this time, the elastic compression cap 4 is evacuated and contracted through the tail end, achieving... Figure 2 State; When the compressor is running normally, the vane 3 can continue to contact the roller 2 due to the back pressure. At this time, the elastic compression cap 4 cannot provide the force at the tail end of the vane, which can reduce the pressure of the vane 3 on the roller, reduce wear and reduce power consumption. At the same time, it removes the force required by the elastic compression cap 4 in the early stage of operation, which also reduces power consumption.

[0078] When the compressor stops, the pressure difference between the low-pressure area at the suction port and the high-pressure area inside the compressor gradually decreases, and the pressure difference between the negative pressure area at the tail end of the elastic compression cap 4 and the outer periphery of the elastic compression cap 4 gradually balances. At this time, the elastic compression cap 4 gradually expands (i.e. extends) under its own rebound force. The elastic compression cap 4 then provides force to the tail end of the vane again, keeping the vane head in contact with the roller 2 so that the compressor can operate normally the next time it is started.

[0079] When the compressor encounters liquid conditions during operation, the vane 3 and roller 2 may separate due to the liquid in the suction. At this time, the back pressure is insufficient to maintain the force for the vane 3 and roller 2 to re-contact. The vane 3 separates from the roller 2, and the compressor cannot operate normally. There is no gas compression in the compressor cavity, which causes the pressure difference between the suction port and the high-pressure zone inside the compressor to gradually decrease. The pressure difference between the negative pressure zone at the tail end of the elastic compression cap 4 and the periphery of the elastic compression cap 4 also decreases, and the elastic compression cap 4 expands. At this time, the rollers in the compressor cavity are still expanding. When the rollers move towards the vane end, when the compression amount of the elastic compression cap 4 H1-H2=H3 (vane stroke), the elastic compression cap 4 can provide force to the tail end of the vane, and the vane 3 and roller 2 re-contact. The compressor resumes normal operation. After the compressor operates normally, the pressure difference is re-established, the elastic compression cap 4 contracts, and the vane 3 is only kept in contact with the roller 2 by the back pressure, and the compressor power consumption is reduced.

[0080] According to an embodiment of the present invention, an air conditioner is also provided, including the rotary compressor described above.

[0081] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A rotary compressor, comprising: The cylinder (1) is constructed with a receiving cavity (11) and a sliding groove (12) communicating with the receiving cavity (11); Roller (2) is located inside the accommodating cavity (11); The slide (3) is slidably disposed in the slide groove (12), and the head end of the slide (3) is in contact with the outer peripheral wall of the roller (2); The rotary compressor is characterized in that it further includes: An elastic compression cap (4) is disposed at the tail end of the slide (3). The elastic compression cap (4) includes a force-applying head (41). The elastic compression cap (4) has an extended state in which the force-applying head (41) contacts the tail end and a retracted state in which the force-applying head (41) disengages from the tail end. The elastic compression cap (4) can switch from the extended state to the retracted state under the action of the pressure difference between its inner and outer sides. The elastic compression cap (4) can also switch from the retracted state to the extended state under the action of its own elasticity.

2. The rotary compressor according to claim 1, characterized in that, The space on the side of the elastic compression cap (4) closest to the slide plate (3) is connected to the exhaust passage of the compressor, and the space on the side of the elastic compression cap (4) furthest from the slide plate (3) is connected to the intake passage of the compressor.

3. The rotary compressor according to claim 2, characterized in that, The exhaust passage includes the inner cavity of the compressor housing, and the vane groove (12) communicates with the inner cavity of the housing; and / or, The intake channel includes an intake channel (13) constructed on the cylinder (1). A connecting channel (14) is also constructed inside the cylinder (1). One end of the connecting channel (14) is connected to the intake channel (13), and the other end of the connecting channel (14) is connected to the side of the elastic compression cap (4) away from the slide plate (3).

4. The rotary compressor according to claim 3, characterized in that, The connecting channel (14) extends in a straight line from the side of the air intake channel (13) near the elastic compression cap (4) to the side away from the elastic compression cap (4). A first opening is formed on the wall of the air intake channel (13) on the side away from the elastic compression cap (4), and a first sealing member (15) is installed in the first opening to seal it.

5. The rotary compressor according to claim 3, characterized in that, The sliding groove (12) has a mounting hole at one end away from the roller (2), and the elastic compression cap (4) is assembled in the mounting hole. The mounting hole has a second opening on the outer peripheral wall of the cylinder (1), and a second sealing member (16) is installed in the second opening to seal it.

6. The rotary compressor according to claim 5, characterized in that, The elastic compression cap (4) also has a connecting cylinder (42), and there is a foldable thin-walled body (43) between the connecting cylinder (42) and the force-applying head (41). The hollow area formed by the thin-walled body (43) and the connecting cylinder (42) is connected to the connecting channel (14). The elastic compression cap (4) is connected to the inner wall of the mounting hole via the connecting cylinder (42).

7. The rotary compressor according to claim 6, characterized in that, The connecting cylinder (42) is interference-fitted with the inner wall of the mounting hole.

8. The rotary compressor according to claim 3, characterized in that, The area on the side of the elastic compression cap (4) away from the slide (3) can form a negative pressure under the action of the airflow in the air intake channel (13).

9. The rotary compressor according to claim 1, characterized in that, The position where the force-applying head (41) contacts the tail end of the slide (3) is at the middle position of the slide (3) in the axial direction of the roller (2).

10. An air conditioner, characterized in that, The rotary compressor includes any one of claims 1 to 9.

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