CN220956038U - Scroll compressor and air conditioner - Google Patents

Abstract

The utility model provides a scroll compressor, which comprises a movable disc, a static disc and a back pressure cavity, wherein a compression cavity is formed between the movable disc and the static disc, the end surface of the movable disc, which faces the static disc, is a first end surface, the end surface of the static disc, which faces the movable disc, is a second end surface, the first end surface and the second end surface are abutted against each other, the compression cavity is communicated with the back pressure cavity through a pressure regulating hole, a first groove is formed in the first end surface or the second end surface, the pressure regulating hole penetrates through the first groove, and a rotating block is arranged in the first groove; in one rotation period of the movable disc, the rotating block can rotate positively along with the temperature rise so as to gradually reduce the minimum communication area of the pressure regulating hole or gradually reduce the communication duration of the pressure regulating hole; in a rotation period of the movable disc, the rotating block can reversely rotate along with the reduction of temperature to increase the minimum communication area of the pressure regulating hole or the communication duration of the pressure regulating hole, so that the technical problem that in the prior art, the pressure of a back pressure cavity is overlarge when the vortex compressor is in a low-frequency light working condition and the pressure in the back pressure cavity is overlarge when the vortex compressor is in a high-frequency heavy working condition is solved.

Description

Scroll compressor and air conditioner

Technical Field

The utility model belongs to the technical field of compressors, and particularly relates to a scroll compressor and an air conditioner.

Background

In the operation process of the scroll compressor, in order to prevent the overturning phenomenon of the movable plate, a back pressure cavity is generally arranged, and the pressure in the back pressure cavity enables the end face of the movable plate to be attached to the end face of the fixed plate so as to avoid the overturning phenomenon of the movable plate. The back pressure is too small, so that axial clearance leakage is easy to occur; the excessive back pressure tends to increase the frictional wear of the end face.

In order to solve the above problem, in the existing back pressure design, the pressure in the middle of the static disc is usually transmitted to the back of the dynamic disc (namely, the back pressure cavity) through the dynamic disc through hole, or the pressure in the middle of the dynamic disc is transmitted to the back of the dynamic disc through the static disc end surface drainage groove, and the two modes are to form a pressure on the back of the dynamic disc and balance the axial gas force of the pump body, so that the end surface of the dynamic disc is always attached to the end surface of the static disc in the actual operation of the compressor. But both of these approaches cannot avoid a common drawback: the pressure increase ratio of the medium pressure introduction in the existing back pressure design is unchanged, the pressure increase ratio is a fixed value, and the back pressure requirements under different working conditions cannot be accurately met. The sealing between the movable disc and the static disc is good under light load, the pressure is proper, but under heavy load, the pressure in the back pressure cavity is overlarge, the friction force between the movable disc and the static disc is overlarge, so that the operation process is high in temperature, further adhesive wear occurs, the long-term operation leads the abrasion between the movable disc and the static disc to be faster, the sealing is reduced, and the service life is reduced.

How to ensure that the axial pressure between the movable disc and the static disc is in a proper range when the scroll compressor is under heavy load and light load, not only ensuring sealing, but also avoiding overlarge pressure is the problem to be solved at present.

Disclosure of utility model

Therefore, the utility model provides the scroll compressor and the air conditioner, which can solve the technical problems that in the prior art, the pressure of a back pressure cavity of the scroll compressor is too small under a low-frequency light working condition, and the pressure in the back pressure cavity is too large under a high-frequency heavy working condition.

The utility model provides a scroll compressor, which comprises a movable disc, a static disc and a back pressure cavity, wherein a compression cavity is formed between the movable disc and the static disc, and the back pressure cavity and the compression cavity are positioned at two axial sides of the movable disc; the end face of the movable disc, which faces the fixed disc, is a first end face, the end face of the fixed disc, which faces the movable disc, is a second end face, the first end face and the second end face are abutted against each other, the compression cavity is communicated with the back pressure cavity through a pressure regulating hole, a first groove is formed in the first end face or the second end face, the pressure regulating hole conducts the first groove, and a rotating block is arranged in the first groove;

In one rotation period of the movable disc, the rotating block can rotate positively along with the rise of temperature so as to gradually reduce the minimum communication area of the pressure regulating hole or gradually reduce the communication duration of the pressure regulating hole; in one rotation period of the movable disc, the rotating block can reversely rotate along with the reduction of temperature so as to increase the minimum communication area of the pressure regulating hole or increase the communication duration of the pressure regulating hole.

In some embodiments, the pressure regulating hole comprises a first hole and a second hole, the second hole is arranged on the movable disk when the first hole is arranged on the static disk, and the first groove is arranged on the first end surface; when the first hole is arranged on the movable disc, the second hole is arranged on the static disc, the first groove is arranged on the second end face, and an inlet of the second hole is an air inlet;

the rotary block is provided with an adjusting hole, an inlet of the adjusting hole is always communicated with the first hole, and an outlet of the adjusting hole is positioned on the end face, close to the second hole, of the rotary block;

and in the projection of the axial direction of the static disc and in one rotation period of the movable disc, the minimum superposition area of the outlet of the regulating hole and the air inlet can be adjusted by rotating the rotating block, or the time length of disconnection of the outlet of the regulating hole and the air inlet can be adjusted by rotating the rotating block.

In some embodiments, on the projection of the axial direction of the static disc, the outlet end of the adjusting hole is a waist-shaped hole, and the center of the waist-shaped hole coincides with the rotation center of the rotating block; the maximum radius of the motion track of the air inlet is R1, the length of the short side of the waist-shaped hole is H1, and the length of the long side of the waist-shaped hole is H2;

The distance L1 between the center of the motion track of the air inlet and the center of the waist-shaped hole is more than or equal to R1+0.5H1 and less than R1+0.5H2.

In some embodiments, the outlet of the adjusting hole is a circular hole, the distance between the outlet of the adjusting hole and the rotation center of the rotating block is L2, the distance between the air inlet and the rotation center of the rotating block is L3, the radius of the outlet of the adjusting hole is R2, and the radius of the motion track of the air inlet is R3 on the projection of the axial direction of the static disc;

Then 0 < L2-L3 < R2+R3, or 0 < L3-L2 < R2+R3, L2 and L3 are both greater than 0.

In some embodiments, a mounting groove is formed in the side wall of the first groove, a strip-shaped heat-sensitive element is arranged in the mounting groove, a first end of the heat-sensitive element is fixedly connected in the mounting groove, a second end of the heat-sensitive element is connected to the rotating block, and a distance between an extension line of the heat-sensitive element in the length direction of the heat-sensitive element and a rotation axis of the rotating block is greater than 0.

In some embodiments, the second end of the thermal element is provided with a connector, the side wall of the rotating block is concavely provided with a second groove, a sliding rail is arranged between two opposite side walls of the second groove, and the connector is in sliding connection with the sliding rail.

In some embodiments, a sliding rod is arranged between two opposite side walls of the second groove, a T-shaped groove is arranged on the sliding rod, and the connector is arranged in the T-shaped groove;

And/or the distance between two opposite side walls of the second groove is W, and the maximum length extension or shortening amount of the thermosensitive element is L, wherein W is more than or equal to 2.3L.

In some embodiments, the bottom surface of the groove is a first sealing surface, and the rotating block is provided with a second sealing surface opposite to the first sealing surface;

The pressure regulating hole comprises a sealing hole leading to the first sealing surface, the second sealing surface is provided with a connecting pipe, the regulating hole comprises an inner hole of the connecting pipe, the axis of the connecting pipe coincides with the axis of the rotating block, and the connecting pipe can be inserted into the sealing hole and rotate in the sealing hole.

In some embodiments, a first baffle is disposed within the seal bore, the first baffle closing a portion of the seal bore; the end face of one end, far away from the rotating block, of the connecting pipe is provided with a second baffle, and the second baffle seals an inner hole of part of the connecting pipe;

the first baffle faces towards the plate surface of the second baffle and the second baffle faces towards the plate surface of the first baffle to be sealed and abutted.

In some embodiments, the end faces of the vortex teeth of the movable disk and the vortex teeth of the static disk are provided with oil grooves.

The utility model also provides an air conditioner comprising the vortex compressor.

According to the utility model, the rotating block is arranged, the rotating block rotates according to the temperature, when the temperature rises (the temperature rises due to the high-frequency heavy working condition), the rotating block rotates forward to reduce the communication area of the pressure regulating hole or reduce the communication duration of the movable disc in one rotation period, so that the excessive pressure rise in the back pressure cavity leads to the excessive axial friction force between the actuating disc and the static disc; when the temperature is reduced (the temperature of a low-frequency light working condition is reduced), the rotating block reversely rotates to increase the communication area of the pressure regulating hole or increase the communication duration of the movable disc in one rotation period, so that the phenomenon that the pressure in the back pressure cavity is reduced too much, the pressure of the actuating disc is led to be insufficient to generate overturning or the axial sealing of the movable disc and the static disc is caused to be insufficient is avoided; and finally, stable operation of the scroll compressor is realized, and the reliability of the scroll compressor is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. The drawings in the following description are merely exemplary and other implementations drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

FIG. 1 is a schematic bottom view of a stationary and movable platen assembly according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1 in accordance with an embodiment of the present utility model;

FIG. 3 is an enlarged view of the portion C in FIG. 2 according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the waist-shaped hole according to the embodiment of the present utility model covering the movement track of the air inlet;

FIG. 5 is a schematic view of a waist-shaped hole covering a majority of the movement trace of an air inlet according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a waist-shaped hole covering a small portion of the movement track of an air inlet according to an embodiment of the present utility model;

FIG. 7 is a schematic diagram of the separation of the motion trajectories of the waist-shaped hole and the air inlet according to the embodiment of the present utility model;

FIG. 8 is a schematic view of the rotary block according to the embodiment of the present utility model when the outlet is a circular hole and covers the movement track of the air inlet;

FIG. 9 is a schematic view of the rotary block according to the embodiment of the present utility model, in which the outlet is a circular hole and covers most of the movement track of the air inlet;

FIG. 10 is a schematic view of the rotary block according to the embodiment of the present utility model, in which the outlet is a circular hole and covers a small portion of the movement track of the air inlet;

FIG. 11 is a schematic view of the rotary block according to the embodiment of the present utility model when the outlet is a circular hole and separated from the motion track of the air inlet;

FIG. 12 is a schematic view of the waist-shaped hole according to the embodiment of the present utility model when the short side dimension is smaller than the inner diameter of the movement track of the air inlet;

FIG. 13 is a first schematic view of a rotating block structure according to an embodiment of the present utility model;

FIG. 14 is a second schematic view of a rotating block structure according to an embodiment of the present utility model;

FIG. 15 is a third schematic view of a rotating block structure according to an embodiment of the present utility model;

FIG. 16 is a schematic cross-sectional view of a slide bar with a heat sensitive element according to an embodiment of the present utility model being mated thereto;

FIG. 17 is a schematic view of a thermal element according to an embodiment of the present utility model;

FIG. 18 is a schematic diagram of an end face of a slide bar according to an embodiment of the present utility model;

FIG. 19 is a schematic view of the rotational position of the rotor block for light low frequency light load of the scroll compressor according to the embodiment of the present utility model;

FIG. 20 is an enlarged view of portion B of FIG. 19 according to an embodiment of the present utility model;

FIG. 21 is an enlarged view of a portion of a schematic view of the rotational position of a rotor block in a scroll compressor with light high frequency and heavy load in accordance with an embodiment of the present utility model;

FIG. 22 is a schematic end view of a seal bore with a first baffle plate according to an embodiment of the present utility model;

FIG. 23 is an end view of a connecting tube with a second baffle according to an embodiment of the present utility model;

FIG. 24 is an axial schematic view of a connecting tube inserted into a seal bore according to an embodiment of the present utility model;

fig. 25 is a schematic diagram of back pressure chamber pressure variation in the prior art and the present application.

The reference numerals are expressed as:

1. A movable plate; 2. a static disc; 201. a first groove; 202. a first hole; 3. a back pressure chamber; 301. an air inlet; 302. a second hole; 3021. sealing the hole; 4. a compression chamber; 5. a pressure regulating hole; 6. a rotating block; 601. a second groove; 602. a slide bar; 603. a T-shaped groove; 604. a connecting pipe; 605. a waist-shaped hole; 7. a thermosensitive element; 701. a connector; 801. a first baffle; 802. a second baffle; 901. a first passage; 902. and a second passage.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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 exemplary embodiments according to 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 understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. It should be understood, however, that the construction, proportion, and size of the drawings, in which the present utility model is practiced, are all intended to be illustrative only, and not to limit the scope of the present utility model, which should be defined by the appended claims. Any structural modification, proportional change or size adjustment should still fall within the scope of the disclosure without affecting the efficacy and achievement of the present utility model. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "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 "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.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

Referring to fig. 1-25, the scroll compressor provided by the utility model comprises a movable disc 1, a static disc 2 and a back pressure cavity 3, wherein a compression cavity 4 is formed between the movable disc 1 and the static disc 2, and the back pressure cavity 3 and the compression cavity 4 are positioned at two axial sides of the movable disc 1; the end face of the movable disc 1, which faces the fixed disc 2, is a first end face, the end face of the fixed disc 2, which faces the movable disc 1, is a second end face, the first end face and the second end face are abutted against each other, the compression cavity 4 is communicated with the back pressure cavity 3 through a pressure regulating hole 5, a first groove 201 is formed in the first end face or the second end face, the pressure regulating hole 5 conducts the first groove 201, and a rotating block 6 is arranged in the first groove 201;

In one rotation period of the movable disc 1, the rotating block 6 can rotate positively along with the rise of temperature so as to gradually reduce the minimum communication area of the pressure regulating hole 5 or gradually reduce the communication duration of the pressure regulating hole 5; in one rotation period of the movable disc 1, the rotation block 6 can reversely rotate along with the reduction of temperature so as to increase the minimum communication area of the pressure regulating hole 5 or increase the communication duration of the pressure regulating hole 5.

The temperature of the scroll compressor is related to the working frequency and the external working condition, and the heavier the external working condition is, the higher the working frequency is, the higher the temperature of the scroll compressor is; when the external working condition is lighter and the working frequency is lower, the stability of the scroll compressor is lower, friction heat is added, adhesion phenomenon is easy to occur on the friction surface, and the pressure in the back pressure cavity 3 is regulated according to the temperature, so that the excessive or insufficient pressure in the back pressure cavity 3 can be avoided, and the overturning of the movable plate 1 is avoided; the phenomenon that the axial friction surface between the movable disc 1 and the static disc 2 is stuck and burnt out can be effectively avoided, and the high-frequency heavy-load working condition power consumption of the scroll compressor is particularly reduced, and the APF energy efficiency of the whole machine is improved.

When the scroll compressor is increased from a low-frequency light working condition to a high-frequency heavy working condition, the rotation speed of the movable disc 1 is increased, the internal temperature is increased, the rotating block 6 rotates positively (the positive direction and the reverse direction are only different in description in the application) to reduce the communication area of the pressure regulating hole 5, the gas resistance is increased, the pressure increasing ratio of the back pressure cavity 3 is reduced, the gas volume (and/or the gas pressure) transmitted by the gas of the compression cavity 4 into the back pressure cavity 3 is less increased, the leakage of the back pressure cavity 3 is considered, and the pressure increase of the back pressure cavity 3 is also less; the higher the operating frequency (and/or the heavier the working condition) of the scroll compressor, the higher the temperature of the scroll compressor, the larger the rotation angle between the rotating block 6 and the forward rotation, the smaller the communication area between the pressure regulating hole 5, the more the pressure increase ratio is reduced, the less the air quantity transferred from the compression cavity 4 to the back pressure cavity 3 is increased (namely, the higher the temperature is, the more the air quantity transferred to the back pressure cavity 3 is increased, but the air quantity is increased according to a fixed speed, but the smaller and smaller speed is increased), so that the pressure of the back pressure cavity 3 is increased, the phenomenon that the movable disc 1 is overturned is ensured not to be generated stably, the too high pressure of the back pressure cavity 3 is avoided, the axial friction force between the movable disc 1 and the static disc 2 under high-frequency heavy load is further reduced, and the operating reliability of the scroll compressor is improved. As the working frequency of the scroll compressor increases (and/or the working condition increases), the temperature of the compressor is higher, the rotating block 6 continuously rotates forward until the minimum communication area of the pressure regulating holes 5 is reduced to 0, at this time, the pressure regulating holes 5 are not continuously communicated any more, but are communicated in part of the time in one period of rotation of the movable plate 1, that is, the communication duration of the pressure regulating holes 5 is reduced; and the communication duration of the pressure regulating hole 5 gradually decreases with further increase of the temperature. The reason why the pressure rising speed of the back pressure cavity 3 can be reduced by reducing the communication duration of the pressure regulating hole 5 is that when the pressure regulating hole 5 is communicated, more air volume (and/or larger pressure of air) is conveyed to the back pressure cavity 3 by the compression cavity 4, meanwhile, the air in the back pressure cavity 3 continuously leaks outwards, at the moment, the air volume entering the back pressure cavity 3 is instantaneously higher, when the pressure in the back pressure cavity 3 is still rising (not rising too much) due to the high-frequency rotation of the movable disc 1, the pressure regulating hole 5 is disconnected due to the rotation of the movable disc 1, at the moment, the compression cavity 4 does not convey air to the back pressure cavity 3 any more, the air in the back pressure cavity 3 is reduced due to the fact that the air in the back pressure cavity 3 continuously leaks outwards, the pressure in the back pressure cavity 3 is reduced, and the pressure in the back pressure cavity 3 does not fluctuate greatly in one rotation period of the movable disc 1 due to the high-frequency rotation of the movable disc 1; this prevents the pressure of the back pressure chamber 3 from rising excessively.

Similarly, when the scroll compressor gradually decreases from the high-frequency heavy working condition to the low-frequency light working condition, the internal temperature decreases, and in one rotation period of the movable disc 1, the rotation block 6 reversely rotates to reduce the disconnection time of the pressure regulating hole 5 (increase the connection time of the pressure regulating hole 5), and the connection time of the pressure regulating hole 5 gradually increases along with the further decrease of the temperature (the decrease of the working frequency and the decrease of the working condition load). The reason why raising the communication duration of the pressure regulating hole 5 can reduce the speed of pressure reduction of the back pressure chamber 3 is that when the pressure regulating hole 5 is communicated, the compression chamber 4 delivers less air volume (and/or lower air pressure) to the back pressure chamber 3, and at the same time, the air in the back pressure chamber 3 continuously leaks outwards, and at the same time, the air volume entering the back pressure chamber 3 is less (and/or the air pressure is lower), so that the pressure of the back pressure chamber 3 is reduced, the working frequency of the scroll compressor is gradually reduced (working condition load is reduced), the communication duration of the pressure regulating hole 5 is increased, and although the speed of the air volume entering the back pressure chamber 3 is reduced, the delivery duration is increased, so that the speed of pressure reduction in the back pressure chamber 3 is not too fast; as the working frequency of the scroll compressor is further reduced, the time length of the pressure regulating hole 5 which is disconnected is gradually reduced to 0, and the compression cavity 4 continuously transmits gas to the back pressure cavity 3, so that the pressure of the back pressure cavity 3 is prevented from being too low; the rotating block 6 continuously rotates reversely, the minimum communication area of the pressure regulating hole 5 is gradually increased, and the damping is reduced although the speed of the entering gas is reduced, so that the pressure of the back pressure cavity 3 is not reduced too much, the axial sealing between the movable disc 1 and the static disc 2 is ensured, and the phenomenon that the movable disc 1 overturns is avoided.

The forward rotation and the reverse rotation are relative rotation directions, and no primary and secondary parts exist.

According to the application, the pressure of the back pressure cavity 3 is not too low in the low-frequency light working condition, and the pressure of the back pressure cavity 3 is not too high in the high-frequency heavy working condition, so that the axial sealing between the movable disc 1 and the static disc 2 is good, the overturning phenomenon of the movable disc 1 is avoided, the axial friction between the movable disc 1 and the static disc 2 is avoided, the friction and the adhesive wear are generated, and the working performance and the service life of the scroll compressor are finally improved.

The compression chamber 4 comprises a plurality of crescent chambers with cyclically-changed volumes, and the crescent chambers can be divided into a high-pressure area, a medium-pressure area and a low-pressure area from the center of the static disc 2 to the edge direction of the static disc 2. One end of the pressure regulating bore 5 preferably communicates with a crescent cavity (compression cavity 4) located in the intermediate pressure zone. The pressure in the low pressure area is too low, which easily causes insufficient back pressure, and the pressure in the high pressure area is too high, which easily causes too high back pressure.

As shown in fig. 25, the ordinate is the back pressure cavity pressure gradually increasing from bottom to top, the abscissa is the working condition gradually increasing from left to right (the pressure of the compression cavity gradually increasing), and the abscissa may be the rotation frequency of the movable disc, which is only exemplified by the change of the working condition.

As is clear from fig. 25, as the operating conditions increase, the pressure of the compression chamber output increases, and the pressure of the back pressure chamber in the operating conditions of the prior art (non-adjustable intermediate pressure) compressor is significantly higher in the intermediate refrigeration, nominal refrigeration and standard conditions than in the operating conditions of the present application.

Preferably, as shown in fig. 2-3, the pressure regulating hole 5 includes a first hole 202 and a second hole 302, when the first hole 202 is disposed on the fixed disk 2, the second hole 302 is disposed on the movable disk 1, and the first groove 201 is disposed on the first end surface; when the first hole 202 is arranged on the movable disc 1, the second hole 302 is arranged on the static disc 2, the first groove 201 is arranged on the second end surface, and the inlet of the second hole 302 is an air inlet 301;

The rotating block 6 is provided with an adjusting hole, an inlet of the adjusting hole is always communicated with the first hole 202, and an outlet of the adjusting hole is positioned on the end face of the rotating block 6 close to the second hole 302;

On the projection of the axial direction of the static disc 2 and in one rotation period of the movable disc 1, the minimum overlapping area of the outlet of the adjusting hole and the air inlet 301 can be adjusted by rotating the rotating block 6, or the time length of disconnection of the outlet of the adjusting hole and the air inlet 301 can be adjusted by rotating the rotating block 6.

The first hole 202 is arranged on the static disc 2, and the first groove 201 is also arranged on the static disc 2, so that the rotating block 6 is convenient to rotate because the static disc 2 is static, and the rotating block 6 is stable to rotate; scheme II: the first hole 202 is formed in the movable disk 1, and the first groove 201 is also formed in the movable disk 1, so that the movable disk 1 is disposed below the stationary disk 2, the second end faces upward, and the opening of the first groove 201 is also upward, thereby facilitating the installation of the rotating block 6.

The outlet of the adjusting hole is positioned on the end face of the rotating block 6 close to the second hole 302, the connection relation between the outlet of the adjusting hole and the air inlet 301 can be periodically changed by rotating the movable plate 1, the rotating block 6 is controlled to rotate by the aid of the periodic change, and accordingly the fact that the pressure of the back pressure cavity 3 is not excessively increased under high-frequency working conditions and the pressure of the back pressure cavity 3 is not excessively reduced under low-frequency working conditions is achieved. Therefore, the control structure for the minimum communication area and the communication duration of the pressure regulating hole 5 is simple and convenient, and the production, the installation and the later maintenance are convenient.

Preferably, as shown in fig. 4-7, on the projection of the axial direction of the static disc 2, the outlet end of the adjusting hole is a waist-shaped hole 605, and the center of the waist-shaped hole 605 coincides with the rotation center of the rotating block 6; the maximum radius of the motion track of the air inlet 301 is R1, the length of the short side of the waist-shaped hole 605 is H1, and the length of the long side of the waist-shaped hole 605 is H2;

the distance L1 between the center of the motion track of the air inlet 301 and the center of the waist-shaped hole 605 is greater than or equal to r1+0.5H1 and less than r1+0.5h2.

The outlet end of the adjusting hole is a waist-shaped hole 605 which is convenient for the communication between the inlet and the outlet of the adjusting hole and is convenient for processing.

The relative positional relationship of the movement of the waist-shaped hole 605 or the movement of the second hole 302 is constant, and the positional relationship between the air inlet 301 and the waist-shaped hole 605 is changed.

Through the fact that L1 is greater than or equal to R1+0.5H1, the air inlet 301 is prevented from being communicated with the waist-shaped hole 605 all the time in one rotation period of the movable disc 1; by L1 being smaller than R1+0.5H2, the waist-shaped hole 605 and the air inlet 301 can not be communicated all the time in one rotation period of the movable disc 1.

Through L1 more than or equal to R1+0.5H1 less than R1+0.5H2, the rotation of the rotating block 6 can change the communication area between the waist-shaped hole 605 and the air inlet 301 and the communication duration between the waist-shaped hole 605 and the air inlet 301 in one period of the movable disc 1, so that the gas pressure in the back pressure cavity 3 is ensured not to be too high or too low. Taking the example that the second hole 302 is arranged on the movable disc 1, the movement track of the air inlet 301 is annular (the dotted line annular shape in fig. 3-6 is the movement track of the air inlet 301), and the movement track of the air inlet 301 is completely covered by the waist-shaped hole 605 in the low-frequency light working condition (shown in fig. 4-7), in fig. 3, the communication area between the air inlet 301 and the waist-shaped hole 605 is the largest, and the temperature of the pump body (comprising the movable disc 1 and the fixed disc 2) is increased along with the increase of the working condition of the scroll compressor (the increase of the rotation frequency of the movable disc 1), and the rotation block 6 is rotated positively (rotated clockwise in fig. 3-6); when the rotating block 6 rotates to the position shown in fig. 5, the rotating disc 1 rotates to periodically change the communication area between the air inlet 301 and the waist-shaped hole 605 (the air inlet 301 and the waist-shaped hole 605 can be communicated all the time), so that the minimum communication area between the air inlet 301 and the waist-shaped hole 605 is reduced in one rotating period of the rotating disc 1; when the working condition of the scroll compressor continues to rise to the heavy working condition (the rotation frequency of the movable disc 1 increases), the pump body temperature also rises, the rotating block 6 continues to rotate positively, and when the rotating block 6 rotates to the position shown in fig. 6, the air inlet 301 is only partially communicated with the waist-shaped hole 605 (namely, is partially disconnected) in one rotation period of the movable disc 1; in the process of rotating the rotating block 6 from fig. 6 to fig. 7, the communication duration between the air inlet 301 and the waist-shaped hole 605 is gradually shortened in one rotation period of the movable disc 1; when the temperature of the pump body is higher,

The rotating block 6 continues to rotate forward, as shown in fig. 7, so that the movement track of the air inlet 301 is completely separated from the waist-shaped hole 605, and at this time, the pressure regulating hole 5 is completely disconnected. Accordingly, when the operating frequency of the scroll compressor gradually decreases, the movement locus of the intake port 301 in the reverse rotation (counterclockwise rotation in fig. 4 to 7) of the rotating block 6 is opposite to the communication condition of the waist-shaped hole 605 and the forward rotation of the rotating block 6.

When the second hole 302 is stationary and the first hole 202 rotates, the positional relationship between the air inlet 301 and the waist-shaped hole 605 is uniform, and will not be described.

As shown in fig. 12, when the short side length of the kidney-shaped hole 605 is smaller than the outer circle diameter of the movement locus of the air inlet 301, the rotary block 6 rotates, so that the air inlet 301 can be communicated with the kidney-shaped hole 605 twice and disconnected twice in one rotation period of the movable disk 1; the gas pressure in the back pressure cavity 3 can be more stable, so that the axial friction force between the movable disc 1 and the static disc 2 is more stable, the friction is reduced, and the service life of the scroll compressor is prolonged; meanwhile, the output power of the motor for driving the movable disk 1 to rotate is more stable (the phenomenon that the output of the motor fluctuates greatly is reduced or avoided), and the working performance and the service life of the motor are improved.

Preferably, as shown in fig. 8-11, the outlet of the adjusting hole is a circular hole, the distance between the outlet of the adjusting hole and the rotation center of the rotating block 6 is L2, the distance between the air inlet 301 and the rotation center of the rotating block 6 is L3, the radius of the outlet of the adjusting hole is R2, and the radius of the motion track of the air inlet 301 is R3 on the projection of the axial direction of the static disc 2;

Then 0 < L2-L3 < R2+R3, or 0 < L3-L2 < R2+R3, L2 and L3 are both greater than 0.

By making 0 < L2-L3 < R2+R3, or 0 < L3-L2 < R2+R3, L2 and L3 are all larger than 0, when the rotating block 6 rotates to a preset range, the motion track of the air inlet 301 can always coincide with the outlet part of the regulating hole; also, within a preset range, the positional relationship between the air inlet 301 and the outlet of the adjustment hole varies with the rotation of the rotating block 6.

For example, referring to fig. 8-11, the movement track of the air inlet 301 is annular (the dashed annular shape in fig. 8-11 is the movement track of the air inlet 301), and explaining (referring to fig. 8-11), in fig. 8, the air outlet of the adjusting hole completely covers the movement track of the air inlet 301 in the low-frequency light working condition, at this time, the communication area between the air inlet 301 and the air outlet of the adjusting hole is the largest, and as the working condition of the scroll compressor increases (the rotation frequency of the movable disc 1 increases), the temperature of the pump body (including the movable disc 1 and the stationary disc 2) increases, the heat sensitive element 7 (not shown in fig. 8-11) is heated to elongate and push the rotation block 6 to rotate forward (clockwise in fig. 8-11); when the rotating block 6 rotates to the position shown in fig. 9, the movable disk 1 rotates to periodically change the communication area between the air inlet 301 and the air outlet of the adjusting hole (the air inlet 301 and the air outlet of the adjusting hole can be always communicated), so that the minimum communication area between the air inlet 301 and the air outlet of the adjusting hole is reduced in one rotation period of the movable disk 1; when the working condition of the scroll compressor continues to rise to the heavy working condition (the rotation frequency of the movable disc 1 rises), the temperature of the pump body also rises, the heat-sensitive element 7 stretches to enable the rotary block 6 to continue to rotate positively, and when the rotary block 6 rotates to the position shown in fig. 10, in one rotation period of the movable disc 1, only part of the air inlet 301 is communicated with the air outlet of the adjusting hole (namely, part of the air inlet is disconnected); in the process of rotating the rotating block 6 from fig. 10 to fig. 11, in one rotation period of the movable disc 1, the communication duration between the air inlet 301 and the air outlet of the adjusting hole is gradually shortened; when the temperature of the pump body is higher, the thermosensitive element 7 pushes the rotating block 6 to continuously rotate forward, so that the motion track of the air inlet 301 is completely separated from the air outlet of the regulating hole, and the pressure regulating hole 5 is completely disconnected. Accordingly, when the operating frequency of the scroll compressor gradually decreases, the movement locus of the intake port 301 of the rotating block 6 is reversed (counterclockwise in fig. 8 to 11) against the communication condition of the air outlet port of the adjustment hole and the forward rotation of the rotating block 6.

Preferably, as shown in fig. 19-21, a mounting groove is formed in a side wall of the first groove 201, a strip-shaped heat sensitive element 7 is disposed in the mounting groove, a first end of the heat sensitive element 7 is fixedly connected in the mounting groove, a second end of the heat sensitive element 7 is connected to the rotating block 6, and a distance between an extension line of the heat sensitive element 7 in a length direction thereof and a rotation axis of the rotating block 6 is greater than 0.

The thermosensitive element 7 can be elongated with an increase in temperature and shortened with a decrease in temperature. The thermosensitive element 7 is made of a thermosensitive material having the property of expanding with heat and contracting with cold. The distance between the extension line of the thermal element 7 in the length direction thereof and the rotation axis of the rotation block 6 is greater than 0, so that the acting force when the thermal element 7 is extended or shortened does not pass through the axis of the rotation block 6, and the rotation block 6 can be pushed to rotate.

The heat-sensitive element 7 stretches to drive the rotating block 6 to rotate forward, and the heat-sensitive element 7 shortens to drive the rotating block 6 to rotate reversely; the rotating block 6 is rotated by the thermosensitive element 7, and the rotating block 6 is rotated to adjust the on-off or off-time length (communication time length) of the pressure regulating hole 5; through setting up the rotation angle size and the rotation direction of direct adjustment pivoted piece 6 of temperature-sensitive element 7, effectual the intercommunication area or the disconnection duration of adjusting pressure hole 5 have further the pressure of effective timely adjustment backpressure chamber 3, are favorable and guarantee the steady operation of compressor.

Preferably, as shown in fig. 14-17, the second end of the thermal element 7 is provided with a connector 701, the side wall of the rotating block 6 is concavely provided with a second groove 601, a sliding rail is arranged between two opposite side walls of the second groove 601, and the connector 701 is slidably connected with the sliding rail.

Through setting up second recess 601, thermistor 7 passes through the slide rail sliding connection in connector 701 and the second recess 601 for thermistor 7 and the partial being located of turning block 6 complex second recess 601, this makes the outer periphery of turning block 6 can laminate the slip with the interior circular side of first recess 201, has guaranteed the leakproofness between turning block 6 and the first recess 201, has avoided leaking by compression chamber 4 exhaust gas from between turning block 6 and the first recess 201, has not only guaranteed the pressure in the back pressure chamber 3, can also reduce the loss of the internal tolerance of compression chamber 4, is favorable to improving scroll compressor's compression efficiency.

Preferably, as shown in fig. 16-18, a sliding rod 602 is disposed between two opposite side walls of the second groove 601, a T-shaped groove 603 is disposed on the sliding rod 602, and the connector 701 is disposed in the T-shaped groove 603;

And/or, the distance between two opposite side walls of the second groove 601 is W, the maximum length extension or shortening amount of the heat sensitive element 7 is L, and W is more than or equal to 2.3L.

Through setting up slide bar 602, set up T type groove 603 on slide bar 602, connector 701 sets up in T type groove 603 for thermal element 7 can with rotating block 6 sliding connection, so, make thermal element 7 can more stable drive rotating block 6 corotation and reversal, be favorable to improving the regulation stability and the agility to back pressure chamber 3 internal pressure.

Mounting holes may be provided on two opposite side walls of the second groove 601, into which the slide bar 602 is inserted, the T-shaped groove 603 facing the heat sensitive element 7.

The position of the thermo-sensitive element 7 is shown in fig. 20 when the scroll compressor is lightly loaded at low frequency, and the position of the thermo-sensitive element 7 is shown in fig. 21 when the scroll compressor is heavily loaded at high frequency, and the thermo-sensitive element 7 pushes the turning block 6 to turn counterclockwise (here, counterclockwise is limited to the orientations shown in fig. 19, 20 and 21) by a certain angle.

Through computer simulation, by enabling W to be more than or equal to 2.3L, the thermosensitive element 7 can drive the rotating block 6 to rotate by a required angle when being heated and stretched, and interference of the side wall of the second groove 601 on the thermosensitive element 7 is avoided.

Preferably, as shown in fig. 2-3, the bottom surface of the groove is a first sealing surface, and the rotating block 6 is provided with a second sealing surface opposite to the first sealing surface;

The pressure regulating hole 5 comprises a sealing hole 3021 leading to the first sealing surface, the second sealing surface is provided with a connecting pipe 604, the regulating hole comprises an inner hole of the connecting pipe 604, the axis of the connecting pipe 604 coincides with the axis of the rotating block 6, and the connecting pipe 604 can be inserted into the sealing hole 3021 and rotate in the sealing hole 3021.

The tightness between the turning block 6 and the first groove 201 is improved by the first sealing surface and the second sealing surface.

The connecting pipe 604 is inserted into the sealing hole 3021, and when the rotating block 6 rotates, the connecting pipe 604 radially limits the performance of the rotating block 6, so that the tightness between the outer circumferential surface of the rotating block 6 and the inner circumferential surface of the first groove 201 is ensured; meanwhile, the phenomenon that the rotating block 6 deflects along the radial direction in the rotating process is avoided, and the rotating stability of the rotating block 6 is improved.

Preferably, as shown in fig. 22-24, a first baffle 801 is disposed in the sealing hole 3021, and the first baffle 801 seals part of the sealing hole 3021; the end face of the connecting pipe 604 far away from one end of the rotating block 6 is provided with a second baffle 802, and the second baffle 802 seals part of the inner hole of the connecting pipe 604;

The plate surface of the first baffle 801 facing the second baffle 802 is in sealing contact with the plate surface of the second baffle 802 facing the first baffle 801.

The first baffle 801 encloses a portion of the seal bore 3021, i.e., the seal bore 3021 leaves a portion of the gas passage that is the first passage 901; the second baffle 802 encloses a portion of the inner bore of the connecting tube 604, i.e., the inner bore of the connecting tube 604 leaves a portion of the gas passage that is the second passage 902.

The sealing abutment between the first barrier 801 and the second barrier 802 allows gas to enter the second passage 902 mainly from the first passage 901; on the projection of the axial direction of the rotating block 6, when the first passage 901 and the second passage 902 are partially overlapped, the gas can circulate; the rotation of the rotating block 6 can adjust the communication area of the first passage 901 and the second passage 902, so that the flow area of the pressure regulating hole 5 is changed, the damping size in the pressure regulating hole 5 is changed, and the pressure size in the back pressure cavity 3 is adjusted.

The rotation block 6 rotates positively to reduce the overlapping area of the first passage 901 and the second passage 902, and correspondingly, the rotation block 6 rotates reversely to increase the overlapping area of the first passage 901 and the second passage 902; the flow area of the pressure regulating hole 5 is doubly controlled by matching the position relation between the outlet of the regulating hole and the air inlet 301, so that the pressure of the back pressure cavity 3 is regulated more stably.

Preferably, the end surfaces of the vortex teeth of the movable disc 1 and the vortex teeth of the static disc 2 are provided with oil grooves.

The lubricating oil in the compression cavity 4 or the lubricating oil in the high-pressure cavity is introduced into the oil groove, so that the axial lubricity between the movable disc 1 and the static disc 2 is improved, the thermal deformation is reduced, and the friction and abrasion of the end face of the well bottom are reduced.

The utility model also provides an air conditioner comprising the vortex compressor.

The air conditioner has the advantages of low noise, low vibration and long service life.

Those skilled in the art will readily appreciate that the advantageous features of the various aspects described above may be freely combined and stacked without conflict.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model. The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (11)

1. The scroll compressor comprises a movable disc (1), a static disc (2) and a back pressure cavity (3), wherein a compression cavity (4) is formed between the movable disc (1) and the static disc (2), and the back pressure cavity (3) and the compression cavity (4) are positioned on two axial sides of the movable disc (1); the end face of the movable disc (1) facing the fixed disc (2) is a first end face, the end face of the fixed disc (2) facing the movable disc (1) is a second end face, and the first end face and the second end face are abutted against each other, and the novel rotary compressor is characterized in that the compression cavity (4) is communicated with the back pressure cavity (3) through a pressure regulating hole (5), a first groove (201) is formed in the first end face or the second end face, the pressure regulating hole (5) is communicated with the first groove (201), and a rotary block (6) is arranged in the first groove (201);

In one rotation period of the movable disc (1), the rotating block (6) can rotate positively along with the rise of temperature so as to gradually reduce the minimum communication area of the pressure regulating hole (5) or gradually reduce the communication duration of the pressure regulating hole (5); in one rotation period of the movable disc (1), the rotating block (6) can reversely rotate along with the reduction of temperature so as to increase the minimum communication area of the pressure regulating hole (5) or increase the communication duration of the pressure regulating hole (5).

2. The scroll compressor according to claim 1, wherein the pressure regulating hole (5) comprises a first hole (202) and a second hole (302), the second hole (302) being provided on the movable disc (1) and the first recess (201) being provided on the first end face when the first hole (202) is provided on the stationary disc (2); when the first hole (202) is arranged on the movable disc (1), the second hole (302) is arranged on the fixed disc (2), the first groove (201) is arranged on the second end surface, and an inlet of the second hole (302) is an air inlet (301);

an adjusting hole is formed in the rotating block (6), an inlet of the adjusting hole is always communicated with the first hole (202), and an outlet of the adjusting hole is positioned on the end face, close to the second hole (302), of the rotating block (6);

And on the projection of the axial direction of the static disc (2) and in one rotation period of the movable disc (1), the minimum overlapping area of the outlet of the regulating hole and the air inlet (301) can be adjusted by rotating the rotating block (6), or the time length of disconnection of the outlet of the regulating hole and the air inlet (301) can be adjusted by rotating the rotating block (6).

3. A scroll compressor according to claim 2, wherein the outlet end of the adjustment hole is a kidney-shaped hole (605) on the projection of the static disc (2) in the axial direction, the center of the kidney-shaped hole (605) coinciding with the rotation center of the rotating block (6); the maximum radius of the motion track of the air inlet (301) is R1, the length of the short side of the waist-shaped hole (605) is H1, and the length of the long side of the waist-shaped hole (605) is H2;

The distance L1 between the center of the motion track of the air inlet (301) and the center of the waist-shaped hole (605) is more than or equal to R1+0.5H1 and less than R1+0.5H2.

4. The scroll compressor according to claim 2, wherein the outlet of the adjustment hole is a circular hole, the distance between the outlet of the adjustment hole and the rotation center of the rotation block (6) is L2, the distance between the intake port (301) and the rotation center of the rotation block (6) is L3, the outlet radius of the adjustment hole is R2, and the radius of the movement locus of the intake port (301) is R3 on the projection of the axial direction of the stationary plate (2);

Then 0 < L2-L3 < R2+R3, or 0 < L3-L2 < R2+R3, L2 and L3 are both greater than 0.

5. The scroll compressor according to claim 1, wherein a mounting groove is provided on a side wall of the first groove (201), a strip-shaped heat sensitive element (7) is provided in the mounting groove, a first end of the heat sensitive element (7) is fixedly connected in the mounting groove, a second end of the heat sensitive element (7) is connected to the rotating block (6), and a distance between an extension line of the heat sensitive element (7) in a length direction thereof and a rotation axis of the rotating block (6) is greater than 0.

6. The scroll compressor according to claim 5, wherein the second end of the heat sensitive element (7) is provided with a connector (701), the side wall of the rotating block (6) is concavely provided with a second groove (601), a sliding rail is provided between two opposite side walls of the second groove (601), and the connector (701) is slidably connected with the sliding rail.

7. The scroll compressor according to claim 6, wherein a slide bar (602) is provided between two opposite side walls of the second groove (601), a T-shaped groove (603) is provided on the slide bar (602), and the connector (701) is provided in the T-shaped groove (603);

And/or the distance between two opposite side walls of the second groove (601) is W, and the maximum length extension or shortening amount of the thermosensitive element (7) is L, wherein W is more than or equal to 2.3L.

8. A scroll compressor according to claim 3, wherein the bottom surface of the recess is a first sealing surface, and the turning block (6) is provided with a second sealing surface opposite to the first sealing surface;

The pressure regulating hole (5) comprises a sealing hole (3021) which is communicated with the first sealing surface, the second sealing surface is provided with a connecting pipe (604), the regulating hole comprises an inner hole of the connecting pipe (604), the axis of the connecting pipe (604) coincides with the axis of the rotating block (6), and the connecting pipe (604) can be inserted into the sealing hole (3021) and rotate in the sealing hole (3021).

9. The scroll compressor of claim 8, wherein a first baffle (801) is disposed within the seal bore (3021), the first baffle (801) closing a portion of the seal bore (3021); the end face of one end, far away from the rotating block (6), of the connecting pipe (604) is provided with a second baffle (802), and the second baffle (802) seals an inner hole of part of the connecting pipe (604);

The plate surface of the first baffle plate (801) facing the second baffle plate (802) is in sealing contact with the plate surface of the second baffle plate (802) facing the first baffle plate (801).

10. A scroll compressor according to any one of claims 1-9, wherein the end faces of the scroll teeth of the movable disc (1) and the scroll teeth of the stationary disc (2) are provided with oil grooves.

11. An air conditioner comprising the scroll compressor according to any one of claims 1 to 10.