Patent Description:
In the related art, through disposing a check valve on the stationary scroll plate of a scroll compressor, a discharged refrigerant is prevented from flowing back, and the scroll plate is prevented from generating abrasion and abnormal sounds due to its high speed rotation.

However, when the compressor is shut down, as the check valve completely isolates the intermediate pressure chamber and the discharge space of the scroll compressor, a relatively large starting torque is then required when the compressor is started again, and then this makes the starting of the scroll compressor difficult and further affects the normal operation of the compressor.

The invention disclosed in <CIT> is a load-regulating device for scroll type compressors that utilizes pressure variation in air chambers to control the motion of a gliding block, enabling efficient pressure build-up when the compressor activates and load relief when compression ratios are high, thereby improving compressor performance and reliability.

<CIT> depicts a scroll compressor with an improved bypass structure, featuring a discharge guide and a middle-pressure chamber to optimize efficiency at low loads, and a back-pressure cover to ensure sealing and reduce noise and vibration during refrigerant discharge.

<CIT> describes a counterflow prevention apparatus for scroll compressors, featuring a hinged safety check valve that rapidly opens and closes refrigerant passages to prevent backflow, improve compressor efficiency, reduce collision noise, and minimize vibrations, enhancing overall performance and reducing noise.

The present disclosure aims to solve at least one of the technical problems that exist in the prior art.

To this end, some embodiments of the present disclosure propose a scroll compressor.

In view of this, according to some embodiments of the present disclosure, the present disclosure proposes a scroll compressor, including: a housing; a partition plate, which is provided in the interior of the housing and which divides the interior of the housing into a suction space and a discharge space, and which is provided with a first through hole to communicate the suction space with the discharge space; a rack, which is located in the suction space in the interior of the housing, the rack and the partition plate being spaced apart; a movable scroll plate, which is movably provided on the rack; a stationary scroll plate, which is provided on the rack and which cooperates with the movable scroll plate, and which is provided with a second through hole, and the second through hole communicating with the discharge space; and a pressure relief low-speed rotation structure, which is provided on the stationary scroll plate, and communicates the second through hole with the discharge space.

With regard to the scroll compressor proposed by the present disclosure, the partition plate divides the housing into a suction space and a discharge space, and the partition plate is provided with a first through hole to communicate the suction space with the discharge space; in addition, under the compressing operation of the movable scroll plate and the stationary scroll plate, the refrigerant in the suction space is compressed and discharged into the discharge space.

Furthermore, the stationary scroll plate is further provided with a pressure relief low-speed rotation structure, and the pressure relief low-speed rotation structure can communicate the second through hole with the discharge space. That is, when the scroll compressor is shut down, after the second through hole discharges the refrigerant to the discharge space, as the refrigerant in the discharge space is a compressed refrigerant, the pressure in the discharge space is generally greater than that between the movable scroll plate and the stationary scroll plate, and then the remaining refrigerant of the pressure in the discharge space can return to the place between the movable scroll plate and the stationary scroll plate through the second through hole under the action of the pressure; or, even if the pressure of the discharge space is less than that between the movable scroll plate and the stationary scroll plate, the remaining refrigerant of the pressure between the movable scroll plate and the stationary scroll plate can also enter the discharge space through the second through hole under the action of the pressure, and then the movable scroll plate rotates at a low speed, and then the movable scroll plate is prevented from generating abrasion and abnormal sounds due to its high speed rotation, and then the pressure difference between the movable scroll plate and the stationary scroll plate and the discharge space is balanced, i.e., the pressure difference between the discharge space and the suction space is balanced, and then when the scroll compressor is started at this moment, the resistance to the discharging of the refrigerant is reduced, and the start-up performance of the scroll compressor is improved.

According to the present invention, the pressure relief low-speed rotation structure comprises: a first slideway, provided in the stationary scroll plate and located between the stationary scroll plate and the partition plate; a pressure relief low-speed rotation plate, which is slidably arranged in the first slideway and can abut on the stationary scroll plate, and a passing area between the discharge space and the second through hole can be reduced when the pressure relief low-speed rotation plate abuts on the stationary scroll plate.

In the design, the pressure relief low-speed rotation structure comprises the first slideway and the pressure relief low-speed rotation plate. The pressure relief low-speed rotation plate can slide in the first slideway and can abut on the stationary scroll plate, and when the pressure relief low-speed rotation plate abuts on the stationary scroll plate, the passing area between the discharge space and the second through hole is reduced, and then the refrigerant volume discharged from the discharge space to the second through hole is restrained, and then the low-speed rotation effect of the movable scroll plate is ensured, abnormal sounds and abrasion are reduced, and the checking effect of the pressure relief low-speed rotation structure is ensured when the compressor operates normally, and the normal operation of the compressor is ensured.

In some embodiments, when the movable scroll plate and the stationary scroll plate discharge the refrigerant, as the pressure of the compressed refrigerant between the movable scroll plate and the stationary scroll plate is higher than that in the discharge space, the pressure relief low-speed rotation plate bears force and does not abut on the stationary scroll plate. At this moment, a relatively large passing area is kept between the discharge space and the second through hole, and this further helps the discharge of the compressed refrigerant.

After the movable scroll plate and the stationary scroll plate discharge the refrigerant, as the pressure between the movable scroll plate and the stationary scroll plate is reduced, the pressure in the discharge space will be higher than that between the movable scroll plate and the stationary scroll plate, and then the pressure relief low-speed rotation plate will abut on the stationary scroll plate. At this moment, a relatively small passing area is kept between the discharge space and the second through hole, a small part of the refrigerant in the discharge space will flow back to the place between the movable scroll plate and the stationary scroll plate, and this further ensures the suction volume of the refrigerant between the movable scroll plate and the stationary scroll plate to ensure the normal operation of the scroll compressor.

In addition, only when the scroll compressor is shut down, as the movable scroll plate and the stationary scroll plate do not suck air for a long time, most of the refrigerant in the discharge space will flow into the suction space to balance the pressure difference, and then the compressor is subjected to less resistance when it is started again; in addition, when the compressor operates, the refrigerant in the discharge space will not flow back massively, and this ensures the checking effect of the pressure relief low-speed rotation structure, and improves the start-up performance of the scroll compressor.

According to the present invention, furthermore, the pressure relief low-speed rotation plate is provided with third through holes and fourth through holes; when the pressure relief low-speed rotation plate abuts on the stationary scroll plate, the stationary scroll plate blocks the third through holes, and the fourth through holes communicate the second through hole with the discharge space.

In the design, the pressure relief low-speed rotation plate is provided with the third through holes and the fourth through holes; when the pressure relief low-speed rotation plate abuts on the stationary scroll plate, the stationary scroll plate blocks the third through holes, and then the control over the change of the passing area is achieved, and the structure is simple and the effect is stable.

In addition, the scroll compressor proposed by present disclosure may further comprise the following additional technical features:.

In a possible design, furthermore, the number of the third through holes and/or the fourth through holes can be multiple, and the third through holes are arranged at the peripheral side of the fourth through holes.

In the design, the third through holes are arranged at the peripheral side of the fourth through holes, and when the second through hole, as the discharge channel of the refrigerant, abuts on the pressure relief low-speed rotation plate, the portion of the stationary scroll plate at the peripheral side of the second through hole will block the third through holes, and thus this achieves reducing the passing area between the second through hole and the discharge space.

In addition, disposing the third through holes can ensure sufficient passing area when the second through hole discharges the refrigerant to the discharge space so as to help discharge the refrigerant, and thus there is considerably small passing area when the refrigerant in the discharge space flows back to lower the influence on sucking the refrigerant by the movable scroll plate and the stationary scroll plate, and ensure the normal operation of the scroll compressor.

In a possible design, furthermore, a first limiting part is provided at an end of the first slideway that faces away from the stationary scroll plate, the first limiting part can abut on the pressure relief low-speed rotation plate, and when the first limiting part abuts on the pressure relief low-speed rotation plate, the third through holes and the fourth through holes communicate the second through hole with the discharge space.

In the design, the first limiting part is provided at an end of the first slideway that faces away from the stationary scroll plate, and then the pressure relief low-speed rotation plate is limited when the movable scroll plate and the stationary scroll plate discharge the refrigerant. In addition, when the first limiting part abuts on the pressure relief low-speed rotation plate, the third through holes and the fourth through holes communicate the second through hole with the discharge space at the same time, and thus, a relatively large passing area is ensured between the second through hole and the discharge space when the movable scroll plate and the stationary scroll plate discharge the refrigerant.

In a possible design, furthermore, it further comprises: a back pressure plate, provided on the stationary scroll plate, and the first slideway is disposed in the back pressure plate; a floating plate, movably connected with the back pressure plate, and the stationary scroll plate, the back pressure plate and the floating plate form a cavity, the stationary scroll plate is provided with a fifth through hole, and the opening of the fifth through hole is positioned in the cavity.

In the design, the scroll compressor is further provided with the back pressure plate and the floating plate; the stationary scroll plate, the back pressure plate and the floating plate form the cavity, and the cavity is in communication with the intermediate pressure chamber between the movable scroll plate and the stationary scroll plate through the fifth through hole.

When the movable scroll plate and the stationary scroll plate compress the refrigerant, the refrigerant will apply a pressure to the cavity to make the floating plate act; while the floating plate is restrained by the partition plate, and then the stationary scroll plate is forced to press on the movable scroll plate, and then the tightness between the movable scroll plate and the stationary scroll plate is enhanced, the effect of compressing the refrigerant by the movable scroll plate and the stationary scroll plate is improved, and the efficiency of the scroll compressor is enhanced.

In a possible design, furthermore, it further comprises: a discharge pipe, connected with the housing, and the discharge pipe is in communication with the discharge space; and a check device, arranged in the discharge pipe.

In the design, the scroll compressor further comprises the discharge pipe, the discharge pipe is in communication with the discharge space, and then the refrigerant in the discharge space is discharged by the discharge pipe after the movable scroll plate and the stationary scroll plate discharge the refrigerant to the discharge space. In addition, the discharge pipe is provided with the check device, and after the refrigerant in the discharge space is discharged out through the discharge pipe, the backflow of the refrigerant is prevented; and then when the scroll compressor is shut down, the discharge space is not in communication with downstream equipment, and this further ensures a fixed refrigerant volume in the discharge space, and then the balancing effect of the pressure difference between the discharge space and the movable scroll plate and the stationary scroll plate is improved.

Ina possible design, furthermore, the check device comprises: a second slideway, disposed in the discharge pipe; a first check plate, fixed at an end of the second slideway; a second limiting part, disposed at an other end of the second slideway; a second check plate, slidably disposed in the second slideway, and the first check plate and the second check plate open or block the discharge pipe.

In the design, the check device comprises the second slideway, the first check plate and the second check plate. And the first check plate is fixed at an end of the second slideway, an other end of the second slideway is provided with the second limiting part, and the second check plate can move between the first check plate and the second check plate.

In some embodiments, when the discharge space discharges the refrigerant to the discharge pipe, the second check plate bears force and abuts on the second limiting part; and at this moment, the discharge space is in communication with the discharge pipe, to help the discharge space discharge the refrigerant to the discharge pipe. When the discharge space accomplishes discharging the refrigerant or the scroll compressor is shut down, the second check plate bears a force outside the discharge pipe and can abut on the first check plate, and then, the discharge space and the discharge pipe are blocked therebetween, to prevent the backflow of the refrigerant from the downstream equipment, and the relative independence of the discharge space is maintained to help balance the pressure difference between the discharge space and the movable scroll plate and the stationary scroll plate, i.e., to help balance the pressure difference between the discharge space and the suction space.

In a possible design, furthermore, the first check plate is provided with a sixth through hole, the second check plate is provided with a seventh through hole; when the first check plate and the second check plate block the discharge pipe, the first check plate blocks the seventh through hole, and the second check plate blocks the sixth through hole.

In the design, the first check plate is provided with the sixth through hole, the second check plate is provided with the seventh through hole; when the second check plate bears force and abuts on the first check plate, the first check plate blocks the seventh through hole in the second check plate, the second check plate blocks the sixth through hole, and then the blocking between the discharge space and the discharge pipe is achieved, and the structure is simple, and the reliability is fine.

In a possible design, furthermore, the discharge pipe comprises: a first pipe, disposed in the housing, and the first check plate is fixed in the first pipe; a second pipe, and a portion of the second pipe is disposed inside the first pipe, the second limiting part is disposed in the second pipe, and the second check plate is disposed between the first check plate and the second pipe.

In the design, the discharge pipe forms a sleeve structure, the first pipe is sleeved on the outer side of a portion of the second pipe, and this further helps the installation and maintenance of the check device.

The additional aspects and advantages of the present disclosure will become apparent in the following description, or will be understood by the practice of the present disclosure.

The above and/or additional aspects and advantages of the present disclosure will be obvious and understood easily from the following description of the embodiments in combination with the accompanying drawings.

The corresponding relationships between the reference signs and the component names in <FIG> are as follows:
<NUM>: scroll compressor, <NUM>: housing,<NUM>: partition plate, <NUM>: first through hole, <NUM>: rack, <NUM>: first rack, <NUM>: second rack, <NUM>: movable scroll plate, <NUM>: stationary scroll plate,<NUM>: second through hole, <NUM>: fifth through hole, <NUM>: pressure relief low-speed rotation structure, <NUM>: first slideway, <NUM>: pressure relief low-speed rotation plate, <NUM>: third through hole, <NUM>: fourth through hole, <NUM>: first limiting part, <NUM>: back pressure plate, <NUM>: floating plate, <NUM>: discharge pipe, <NUM>: first pipe, <NUM>: second pipe, <NUM>: check device, <NUM>: second slideway, <NUM>: first check plate, <NUM>: sixth through hole, <NUM>: second limiting part, <NUM>: second check plate, <NUM>: seventh through hole, <NUM>: suction space, <NUM>: discharge space; <NUM>: motor structure, <NUM>: rotating shaft, <NUM>: suction pipe, <NUM>: suction chamber, <NUM>: intermediate pressure chamber, <NUM>: discharge chamber, and <NUM>: cavity.

In order to understand the above-mentioned objectives, features and advantages of the present disclosure more clearly, a further detailed description of the present disclosure will be given below in combination with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other if there is no conflict.

However, the present disclosure can also be implemented in other manners than those described herein. Therefore, the protection scope of the present disclosure is not limited to the specific embodiments disclosed below.

A scroll compressor <NUM> according to some embodiments of the present disclosure are described below with reference to <FIG>.

As shown in <FIG>, according to some embodiments of the present disclosure, an embodiment of the present disclosure proposes a scroll compressor <NUM>, and the scroll compressor <NUM> comprises: a housing <NUM>, a partition plate <NUM>, a rack <NUM>, a movable scroll plate <NUM> and a stationary scroll plate <NUM>.

The housing <NUM> defines the interior space of the scroll compressor <NUM>; a partition plate <NUM> is provided in the interior of the housing <NUM>; the partition plate <NUM> is used to divide the interior space of the scroll compressor <NUM> into a suction space <NUM> and a discharge space <NUM>. The suction space <NUM> is used to accommodate uncompressed refrigerant, and the discharge space <NUM> is used to accommodate compressed refrigerant.

The movable scroll plate <NUM> and the stationary scroll plate <NUM> are cooperatively arranged in the suction space <NUM>. The movable scroll plate <NUM> and the stationary scroll plate <NUM> can cooperate with each other and form a suction chamber <NUM>, an intermediate pressure chamber <NUM> and a discharge chamber <NUM>.

In some embodiments, the movable scroll plate <NUM> is in a movable state, the stationary scroll plate <NUM> is in a stationary state; the movable scroll plate <NUM> sucks the refrigerant through the suction chamber <NUM> when moving about the rotating shaft <NUM>, then the refrigerant is compressed through the intermediate pressure chamber <NUM>, finally the compressed refrigerant is discharged to the discharge chamber <NUM> to discharge the refrigerant, and then a compressing operation is accomplished.

In addition, the partition plate <NUM> is provided with a first through hole <NUM>, to communicate the suction space <NUM> with the discharge space <NUM>; the stationary scroll plate <NUM> is provided with a second through hole <NUM>, the second through hole <NUM> is in communication with the discharge chamber <NUM>, and then the refrigerant compressed by the movable scroll plate <NUM> and the stationary scroll plate <NUM> can be discharged to the first through hole <NUM> via the second through hole <NUM> and then discharged to the discharge space through the first through hole <NUM>, and thus the discharging of the refrigerant is accomplished.

With regard to the scroll compressor <NUM> proposed by the present disclosure, a pressure relief low-speed rotation structure <NUM> is further arranged between the second through hole <NUM> of the stationary scroll plate <NUM> and the first through hole <NUM> of the partition plate <NUM>, and the pressure relief low-speed rotation structure <NUM> always communicates the second through hole <NUM> with the discharge space <NUM>. When the scroll compressor <NUM> is shut down, as the movable scroll plate <NUM> and the stationary scroll plate <NUM> do not move anymore, the pressure in the discharge chamber <NUM> will be in balance with that in the suction space <NUM>, and then the pressure in the discharge chamber <NUM> is lowered, and therefore, the pressure in the discharge space <NUM> will be higher than that between the movable scroll plate <NUM> and the stationary scroll plate <NUM>, and then the refrigerant in the discharge space <NUM> will flow back to the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM> through the pressure relief low-speed rotation structure <NUM>, and in some embodiments the refrigerant flows to the discharge chamber <NUM> and then flows back to the suction space <NUM> via the discharge chamber <NUM>, and then the movable scroll plate <NUM> rotates at a low speed, and then the movable scroll plate 142is prevented from generating abrasion and abnormal sounds due to its high speed rotation, and the pressure difference between the discharge space 220and the movable scroll plate <NUM> and the stationary scroll plate <NUM> is balanced, in some embodiments, the pressure difference between the discharge space <NUM> and the suction space <NUM>. Therefore, when the movable scroll plate <NUM> and the stationary scroll plate <NUM> execute the compressing operation next time, the resistance to the discharging of the refrigerant will be reduced, and then the refrigerant can enter the discharge space <NUM> more easily, i.e., this helps discharge the refrigerant better, and thus the start-up performance of the scroll compressor is improved.

As shown in <FIG>, on the basis of Embodiment <NUM>, furthermore, the pressure relief low-speed rotation structure <NUM> comprises: a first slideway <NUM> and a pressure relief low-speed rotation plate <NUM> that can slide in the first slideway <NUM>.

In some embodiments, when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant, the pressure relief low-speed rotation plate <NUM> is pushed by the refrigerant and then is away from the stationary scroll plate <NUM>. Then, a relatively large passing area is kept between the second through hole <NUM> and third through holes <NUM>, and then the refrigerant can enter the discharge space <NUM> quickly in a large amount from the second through hole <NUM> via the third through holes <NUM>.

After the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant, as the pressure in the discharge space <NUM> is greater than that between the movable scroll plate <NUM> and the stationary scroll plate <NUM>, and in some embodiments, the pressure in the discharge space <NUM> is greater than that in the discharge chamber <NUM>. Then, the pressure relief low-speed rotation plate <NUM> bears force and abuts on the stationary scroll plate <NUM>, and then the passing area between the second through hole <NUM> and the second through hole <NUM> is reduced, i.e., the volume of the refrigerant that can pass through the discharge space <NUM> and the second through hole <NUM> is reduced, and this further ensures a low-speed rotation effect of the movable scroll plate <NUM>, lowers the abnormal sounds and abrasion, and prevents a large amount of refrigerant backflow in the discharge space <NUM> from affecting the effect of sucking the refrigerant by the movable scroll plate <NUM> and the stationary scroll plate <NUM> and then prevents generating abnormal sounds and abrasion caused by the high-speed rotation of the movable scroll plate <NUM>, and further ensures the normal operation of the scroll compressor <NUM>.

Therefore, in the embodiment, the resistance to the movable scroll plate <NUM> and the stationary scroll plate <NUM> when they discharge the refrigerant is reduced when the scroll compressor <NUM> is started, and then this enables the movable scroll plate <NUM> and the stationary scroll plate <NUM> to suck the refrigerant smoothly when the scroll compressor <NUM> is operating, and then the normal operation of the scroll compressor <NUM> is ensured, and the abnormal sounds and abrasion caused by the high-speed rotation of the movable scroll plate <NUM> is prevented.

In some embodiments, the shape of the pressure relief low-speed rotation plate <NUM> can be disposed arbitrarily according to actual situations, in some embodiments, a circular shape, an elliptic shape, a polygon shape and etc..

In addition, the abnormal sounds and abrasion caused by the fast reverse rotation of the movable scroll plate <NUM> and the stationary scroll plate <NUM> can be prevented.

As shown in <FIG>, on the basis of Embodiment <NUM> or Embodiment <NUM>, furthermore, the pressure relief low-speed rotation plate <NUM> is provided with a plurality of channels. When the pressure relief low-speed rotation plate <NUM> abuts on the stationary scroll plate <NUM>, a portion of the channels can be blocked.

According to the invention, holes are opened in the pressure relief low-speed rotation plate <NUM>, and the holes comprise third through holes <NUM> and fourth through holes <NUM>; when the pressure relief low-speed rotation plate <NUM> abuts on the stationary scroll plate <NUM>, the stationary scroll plate <NUM> can block the third through holes <NUM>, and only the fourth through holes communicate the second through hole <NUM> with the third through holes <NUM>.

Furthermore, the area of the cross section of the pressure relief low-speed rotation plate <NUM> is larger than that of the cross section of the second through hole <NUM>. That is, the pressure relief low-speed rotation plate <NUM> can be erected at the edge of the second through holes <NUM>, while the third through holes <NUM> are arranged at the positions which are shielded by the edge of the second through hole <NUM>.

Therefore, when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant, the pressure relief low-speed rotation plate 154bears the pressure inside the movable scroll plate <NUM> and the stationary scroll plate <NUM> and is pushed away from the stationary scroll plate <NUM>. At this moment, both the third through holes <NUM> and the fourth through holes <NUM> are used as the flowing channels of the refrigerant, and then a relatively large passing area is provided for the refrigerant, and this further helps the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant rapidly.

In addition, after the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant, the pressure relief low-speed rotation plate <NUM> bears the pressure from the discharge space <NUM> and is pushed to and abuts on the stationary scroll plate <NUM>. At this moment, the third through holes <NUM> are blocked by the portion of the stationary scroll plate <NUM> located on the edge of the second through hole <NUM>, only the fourth through holes <NUM> are used as the flowing channels of the refrigerant, and then one or multiple relatively small passing areas are provided for the backflow of the refrigerant, and then this prevents a large amount of refrigerant from flowing back to the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM> from the discharge space <NUM>, further ensures the amount of the refrigerant sucked by the movable scroll plate <NUM> and the stationary scroll plate <NUM>, prevents generating the abnormal sounds and abrasion caused by the high-speed rotation of the movable scroll plate <NUM>, and then ensures the normal operation of the scroll compressor <NUM> while the start-up performance of the scroll compressor <NUM> is improved.

In the embodiment, a plurality of channels are used when the refrigerant flows back and part of the passing is blocked to reduce the passing area of the refrigerant, and this is simple, effective and reliable.

As shown in <FIG>, on the basis of Embodiment <NUM>, furthermore, the fourth through holes <NUM> in the pressure relief low-speed rotation plate <NUM> can be arranged at the central position of the pressure relief low-speed rotation plate <NUM>, and the third through holes <NUM> are arranged at the peripheral side of the fourth through hole <NUM>. The number of the third through holes <NUM> and the fourth through holes <NUM> can be one or multiple.

Disposing the third through holes <NUM> at the peripheral side of the fourth through holes <NUM> better helps the stationary scroll plate <NUM> block the third through holes <NUM>.

In some embodiments, the specific number of the third through holes <NUM> can be arranged according to the discharge capacity of the scroll compressor <NUM>, in some embodiments, two, three, four, five, six and etc..

The shape of the third through holes <NUM> can also be arranged arbitrarily according to the actual situations, in some embodiments: a circular shape, an elliptic shape, a square shape, a polygon shape, a kidney ellipsoid shape and etc..

The specific number of the fourth through holes 1544can also be arranged arbitrarily according to the actual situations, in some embodiments, one, two, three and etc..

The shape of the fourth through holes <NUM> can also be arranged arbitrarily according to the actual situations, in some embodiments: a circular shape, an elliptic shape, a square shape, a polygon shape, a kidney ellipsoid shape and etc..

In some embodiments, it can be that a plurality of third through holes <NUM> are arranged around one fourth through hole <NUM>, or a plurality of third through holes <NUM> are arranged around a plurality of the fourth through holes <NUM>, or one third through hole <NUM> is arranged at the peripheral side of a plurality of fourth through holes <NUM>, or one third through hole <NUM> is arranged at the peripheral side of one fourth through hole <NUM>.

A circular pressure relief low-speed rotation plate 154is taken as an embodiment for description, the fourth through holes <NUM> and the pressure relief low-speed rotation plate <NUM> are concentrically arranged, and four third through holes <NUM> are arranged at the peripheral side of the fourth through holes. The outline of the third through holes <NUM> is a multi-segment curve shape, in some embodiments, there can be four segments of curves, the first segment of curve and the third segment of curve are opposite to each, and the second segment of curve and the fourth segment of curve are opposite to each. The first segment of curve faces the fourth through hole <NUM>, then the first segment of curve and the third segment of curve are arranged concentrically with the periphery of the pressure relief low-speed rotation plate <NUM>, the second segment of curve and the fourth segment of curve are arcs of the diameter of the radius difference between the first segment of curve and the third segment of curve, and the concave faces of the second segment of curve and the fourth segment of curve are opposite to each other. Therefore, the area of the third through holes <NUM> is increased, the passing area when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant is improved, and the passing area of the refrigerant flowing back to the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM> from the discharge space <NUM> is reduced, and then the normal operation of the scroll compressor <NUM> is ensured while the start-up performance of the scroll plate <NUM> is improved and the abnormal sounds and abrasion caused by the high-speed rotation of the movable scroll plate <NUM> are prevented.

As shown in <FIG> and <FIG>, on the basis of Embodiment <NUM> or Embodiment <NUM>, furthermore, the pressure relief low-speed rotation plate <NUM> further comprises a first limiting part <NUM>, and the first limiting part <NUM> is arranged on the first slideway <NUM> and located at an end of the first slideway <NUM> that faces away from the stationary scroll plate <NUM>.

Furthermore, when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant to the discharge space <NUM>, the pressure relief low-speed rotation plate <NUM> abuts on the first limiting part <NUM>, and thus this limits a travel for the pressure relief low-speed rotation plate <NUM>, and further ensures that the pressure relief low-speed rotation plate <NUM> can act correspondingly and rapidly, reduces the occurrence of the time delay of the pressure relief low-speed rotation plate <NUM> in the case of state switching, improves the checking effect of the pressure relief low-speed rotation plate <NUM>, and ensures the normal operation of the scroll compressor <NUM>.

In some embodiments, the first limiting part <NUM> abuts on the peripheral side of the third through holes <NUM> in the pressure relief low-speed rotation plate <NUM>, and this further ensures that the first limiting part <NUM> will not block the third through holes <NUM>, and further ensures the passing area of the pressure relief low-speed rotation plate <NUM> when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant.

As shown in <FIG>, <FIG> and <FIG>, on the basis of any one of Embodiment <NUM> to Embodiment <NUM>, furthermore, the scroll compressor <NUM> further comprises: a back pressure plate <NUM> and a floating plate <NUM> that is provided on the back pressure plate <NUM>. The stationary scroll plate <NUM>, the back pressure plate <NUM> and the floating plate <NUM> form a cavity <NUM>, and the cavity <NUM> is in communication with the intermediate pressure chamber <NUM> through the fifth through hole <NUM> provided in the stationary scroll plate <NUM>.

When the movable scroll plate <NUM> and the stationary scroll plate <NUM> conduct a compressing operation, the refrigerant in the intermediate pressure chamber <NUM> bears pressure and is introduced to the cavity <NUM> through the fifth through hole <NUM>, and thus urges the floating plate <NUM> to float up.

On the above basis, the partition plate <NUM> restrains the moving of the floating plate <NUM>, and thus, the pressure in the cavity <NUM> will act on the stationary scroll plate <NUM> and then press the stationary scroll plate <NUM> towards the movable scroll plate <NUM>, and then the tight connection between the movable scroll plate <NUM> and the stationary scroll plate <NUM> is ensured, i.e., the independence of the suction chamber <NUM>, the intermediate pressure chamber <NUM> and the discharge chamber <NUM> is ensured, and further the compressing effect and the compressing efficiency of the scroll compressor <NUM> are improved.

In some embodiments, the first slideway <NUM> is provided in the back pressure plate <NUM> and located in the intermediate channel of the back pressure plate <NUM>.

As shown in <FIG> and <FIG>, on the basis of Embodiment <NUM>, furthermore, a groove is arranged at an end of the stationary scroll plate <NUM> that faces away from the movable scroll plate <NUM>, and the back pressure plate <NUM> is provided in the groove; in addition, there is a gap between the back pressure plate <NUM> and the sidewall of the groove and the floating plate <NUM> is arranged to cover the gap.

In the embodiment, the groove is arranged at an end of the stationary scroll plate <NUM> that faces away from the movable scroll plate <NUM>; the inner sidewall of the groove is a first wall, and the back pressure plate <NUM> is arranged in the groove; the outer sidewall of the back pressure plate <NUM> is a second wall, the first wall and the second wall are opposite to each other and have a gap therebetween, the two sides of the floating plate <NUM> are respectively movably connected with the first wall and the second wall, and then the stationary scroll plate <NUM>, the back pressure plate <NUM> and the floating plate <NUM> enclose and form the cavity <NUM>.

Therefore, as the back pressure plate <NUM> is provided in the groove of the stationary scroll plate <NUM>, the outer wall of the entire stationary scroll plate <NUM> is integrally formed, and this further increases the tightness between the discharge chamber <NUM> and the suction chamber <NUM>, and further improves the compressing efficiency.

Furthermore, a first sealing member is provided between the floating plate <NUM> and the stationary scroll plate <NUM>, and a second sealing member is provided between the floating plate <NUM> and the back pressure plate <NUM>.

Through disposing the first sealing member between the floating plate <NUM> and the stationary scroll plate <NUM> and disposing the second sealing member between the floating plate <NUM> and the back pressure plate <NUM>, the impermeability is ensured at the connection position between the floating plate <NUM> and the stationary scroll plate <NUM> and at the connection position between the floating plate <NUM> and the back pressure plate <NUM>, leakage from the intermediate pressure chamber <NUM> between the movable scroll plate <NUM> and the stationary scroll plate <NUM> is prevented, and the compressing performance of the movable scroll plate <NUM> and the stationary scroll plate <NUM> is ensured.

In addition, the back pressure plate <NUM> is mounted on the stationary scroll plate <NUM> through screws, and a third sealing member is provided between the stationary scroll plate <NUM> and the back pressure plate <NUM>.

As shown in <FIG>, <FIG>, <FIG>, on the basis of any one of Embodiment <NUM> to Embodiment <NUM>, furthermore, the scroll compressor <NUM> further comprises: a discharge pipe <NUM> and a check device <NUM> that is provided in the discharge pipe <NUM>.

In some embodiments, the check device <NUM> is provided in the discharge pipe <NUM>, when the discharge space <NUM> discharges the refrigerant to downstream equipment, the check device <NUM> communicates and opens the discharge pipe <NUM>, and then the refrigerant can enter the downstream equipment smoothly through the discharge pipe <NUM>. After the discharge space <NUM> discharges the refrigerant, or the scroll compressor <NUM> is shut down, as the pressure in the discharge space <NUM> is reduced, the pressure in the downstream equipment will be larger than that in the discharge space <NUM>, and then, the check device <NUM> blocks the discharge pipe <NUM>, to prevent the backflow of the refrigerant of the downstream equipment.

That is, when the scroll compressor <NUM> is shut down, as the movable scroll plate <NUM> and the stationary scroll plate <NUM> do not conduct the compressing operation anymore, the pressure in the discharge space <NUM> is reduced, and then under the pressure in the downstream equipment, the check device <NUM> will block the discharge pipe <NUM>, and this further ensures that the pressure in the discharge space <NUM> will not increase, and better helps balance the pressure in the discharge space <NUM> and the pressure in the suction space <NUM>, prevents the abnormal sounds and abrasion caused by the high-speed rotation of the movable scroll plate <NUM>, and further improves the start-up performance of the scroll compressor <NUM>.

As shown in <FIG>, on the basis of Embodiment <NUM>, furthermore, the check device <NUM> comprises: a second slideway <NUM>, a first check plate <NUM>, a second limiting part <NUM> and a second check plate <NUM>.

In some embodiments, the second slideway <NUM> is provided in the discharge pipe <NUM>, the first check plate <NUM> is fixed in the second slideway <NUM> and located at an end of the second slideway <NUM> that faces the discharge space <NUM>, and the second limiting part <NUM> is provided at the other end of the second slideway <NUM>.

The second check plate <NUM> can slide between the first check plate <NUM> and the second check plate 196in the second slideway <NUM>.

When the second check plate <NUM> abuts on the first check plate <NUM>, the discharge pipe <NUM> is blocked. When the second check plate <NUM> is separated from the first check plate <NUM>, the discharge pipe <NUM> is opened.

That is, as shown in <FIG>, when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant, the refrigerant enters the discharge space <NUM> through the pressure relief low-speed rotation structure <NUM> and enters the discharge pipe <NUM> from the discharge space <NUM> through the check device <NUM>, and thus the refrigerant is discharged to the downstream equipment. In this situation, the pressure relief low-speed rotation plate <NUM> abuts on the first limiting part <NUM>, the third through holes <NUM> and the fourth through holes <NUM> let the refrigerant pass through at the same time, the second check plate <NUM> abuts on the second limiting part <NUM>, and the refrigerant can be discharged out through the discharge pipe <NUM> via the check device <NUM>, and thus the discharging of the refrigerant is accomplished.

As shown in <FIG>, after the scroll compressor <NUM> is shut down, or after the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant and the discharge space <NUM> discharges the refrigerant to the discharge pipe <NUM>, the refrigerant in the downstream equipment will push the second check plate <NUM> to the first check plate <NUM>, and then the second check plate <NUM> abuts on the first check plate <NUM> and thus the discharge pipe <NUM> is blocked, then the pressure in the discharge space <NUM> can only enter the second through hole <NUM> through the fourth through holes <NUM> in the pressure relief low-speed rotation plate <NUM> and enter the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM>, and thus the start-up performance of the scroll compressor <NUM> is further improved.

In some embodiments, the shape of the first check plate <NUM> can be arranged arbitrarily according to the actual situations, in some embodiments, a circular shape, an elliptic shape, a polygon shape and etc..

The shape of the second check plate <NUM> can be arranged arbitrarily according to the actual situations, in some embodiments, a circular shape, an elliptic shape, a polygon shape and etc..

As shown in <FIG>, on the basis of Embodiment <NUM>, furthermore, the first check plate <NUM> is opened with a sixth through hole <NUM>, and the second check plate <NUM> is opened with a seventh through hole <NUM>.

In some embodiments, as shown in <FIG>, when the first check plate <NUM> abuts on the second check plate <NUM>, the sixth through hole <NUM> and the seventh through hole <NUM> are dislocated from each other and do not intersect. Furthermore, the first check plate <NUM> abuts on the second check plate <NUM>, and then the first check plate <NUM> and the second check plate <NUM> can form an enclosed structure, and this ensures that the refrigerant cannot pass through. As shown in <FIG>, after the first check plate <NUM> is separated from the second check plate <NUM>, the sixth through hole <NUM> and the seventh through hole <NUM> can let the refrigerant pass through.

In some embodiments, the specific number of the sixth through hole <NUM> can be arranged according to the discharge capacity of the scroll compressor <NUM>, in some embodiments, two, three, four, five, six and etc..

The shape of the seventh through hole <NUM> can also be arranged according to the discharge capacity of the scroll compressor, in some embodiments: a circular shape, an elliptic shape, a square shape, a polygon shape, a kidney ellipsoid shape and etc..

The specific number of the sixth through hole <NUM> can be arranged according to the discharge capacity of the scroll compressor <NUM>, in some embodiments, one, two, three and etc..

The shape of the seventh through hole <NUM> can also be arranged arbitrarily according to the actual situations, in some embodiments: a circular shape, an elliptic shape, a square shape, a polygon shape, a kidney ellipsoid shape and etc..

In some embodiments, the sixth through hole <NUM> can be provided at a position of the first check plate <NUM> that faces away from the central position, and the seventh through hole <NUM> can be provided at the central position of the second check plate <NUM>.

A circular first check plate <NUM> and a circular second check plate <NUM> are taken as embodiments for description, a plurality of the sixth through holes <NUM> are provided at the position around the outer side of the center point of the first check plate <NUM>, and one seventh through hole <NUM> is provided at the central position of the second check plate <NUM>.

Furthermore, the outline of the sixth through holes <NUM> is a multi-segment curve shape, and in some embodiments, it can be four segments of curves, the first segment of curve and the third segment of curve are opposite to each, and the second segment of curve and the fourth segment of curve are opposite to each. The first segment of curve faces the fourth through hole <NUM>, then the first segment of curve and the third segment of curve are arranged concentrically with the periphery of the first check plate <NUM>, the second segment of curve and the fourth segment of curve are arcs of the diameter of the radius difference between the first segment of curve and the third segment of curve, and the concave faces of the second segment of curve and the fourth segment of curve are opposite to each other.

That is, when the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant, the refrigerant enters the discharge space <NUM> through the pressure relief low-speed rotation structure <NUM>, and enters the discharge pipe <NUM> from the discharge space <NUM> through the check device <NUM>, and thus the refrigerant is discharged to the downstream equipment. In this situation, the pressure relief low-speed rotation plate <NUM> abuts on the first limiting part <NUM>, the third through holes <NUM> and the fourth through holes <NUM> let the refrigerant pass through at the same time, the second check plate <NUM> abuts on the second limiting part <NUM>, and the refrigerant can be discharged out through the discharge pipe <NUM> via the sixth through hole <NUM> in the first check plate <NUM> and the seventh through hole <NUM> in the second check plate <NUM>, and thus the discharging of the refrigerant is accomplished.

After the scroll compressor <NUM> is shut down, or after the movable scroll plate <NUM> and the stationary scroll plate <NUM> discharge the refrigerant and the discharge space <NUM> discharges the refrigerant to the discharge pipe <NUM>, the refrigerant in the downstream equipment will push the second check plate <NUM> to the first check plate <NUM>, and then the second check plate <NUM> abuts on the first check plate <NUM>, and then the sixth through holes <NUM> and the seventh through hole <NUM> are blocked and then the discharge pipe <NUM> is further blocked, and then the pressure in the discharge space <NUM> can only enter the second through hole <NUM> through the fourth through holes <NUM> in the pressure relief low-speed rotation plate <NUM> and enter the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM>, and this further improves the effect of balancing the pressure between the discharge space <NUM> and the suction space <NUM>, and further improves the start-up performance of the scroll compressor <NUM>.

As shown in <FIG>, on the basis of any one of Embodiment <NUM> to Embodiment <NUM>, furthermore, the discharge pipe <NUM> comprises a first pipe <NUM> and a second pipe <NUM>, and a portion of the second pipe 184is arranged going through the first pipe.

In some embodiments, the first pipe <NUM> is connected with the housing <NUM>, and the second pipe <NUM> is connected with the first pipe <NUM>.

On the above basis, the end of the second pipe <NUM> that is located inside the first pipe <NUM> can be used as a second limiting part <NUM>, and then the manufacturing difficulty is lowered.

A second slideway <NUM> is formed on the interior portion of the first pipe <NUM>, the first check plate <NUM> is provided at a side of the first pipe <NUM> that is away from the second pipe <NUM>, and the second check plate <NUM> is located in the first pipe <NUM> and can slide in the first pipe <NUM>.

As shown in <FIG>, on the basis of any one of Embodiment <NUM> to Embodiment11, furthermore, the scroll compressor <NUM> further comprises a motor structure <NUM>, and the motor structure <NUM> comprises a rotating shaft <NUM>. The rotating shaft <NUM> is connected with the movable scroll plate <NUM> to drive the movable scroll plate <NUM> to move.

In addition, a rack <NUM> comprises a first rack <NUM> and a second rack <NUM>, the movable scroll plate <NUM> and the stationary scroll plate <NUM> are provided on the first rack <NUM>, and the motor structure <NUM> is provided on the second rack <NUM>.

In the embodiment, through the rotating of the rotating shaft <NUM> in the motor structure <NUM>, the movable scroll plate <NUM> is driven to move about the rotating shaft <NUM>, and then the compressing operation of the scroll compressor <NUM> is achieved.

As shown in <FIG>, on the basis of any one of Embodiment <NUM> to Embodiment <NUM>, furthermore, the scroll compressor <NUM> further comprises a suction pipe <NUM>, and the suction pipe <NUM> is in communication with the suction space <NUM>.

In the embodiment, through connecting the suction pipe <NUM> with upstream equipment, sucking the refrigerant into the compressor is achieved.

As shown in <FIG>, the present disclosure proposes a scroll compressor <NUM> which comprises a housing <NUM>, a first rack <NUM> and a second rack <NUM>; a motor structure <NUM> is disposed inside the housing <NUM>; the movable scroll plate <NUM> and the stationary scroll plate <NUM> are disposed above the first rack; the partition plate <NUM> divides the interior of the housing <NUM> into a suction space <NUM> and a discharge space <NUM>; the motor structure <NUM> drives the movable scroll plate <NUM> to rotate through the rotating shaft <NUM>, which is in some embodiments a crankshaft; the movable scroll plate <NUM> constitutes the suction chamber <NUM>, the intermediate pressure chamber <NUM> and the discharge chamber <NUM> along a set trajectory together with the stationary scroll plate <NUM>; the stationary scroll plate <NUM> is opened with a second through hole <NUM> that communicates the intermediate pressure chamber <NUM>; the stationary scroll plate <NUM>, the back pressure plate <NUM> and the floating plate <NUM> constitute the cavity <NUM>; the refrigerant is sucked from the outer side of the stationary scroll plate <NUM>, then compressed in the intermediate pressure chamber <NUM>, discharged to the discharge space <NUM> in the scroll compressor <NUM> from the second through hole <NUM> of the stationary scroll plate <NUM>, and then discharged out of the scroll compressor <NUM> through the discharge pipe <NUM>.

In addition, a pressure relief low-speed rotation plate <NUM> is provided at the discharge outlet of the stationary scroll plate <NUM>, and this effectively prevents that the pressure difference makes the refrigerant flow back to the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM> from the stationary scroll plate <NUM> when the scroll compressor <NUM> stops, and this causes the fast reverse rotation of the movable scroll plate <NUM> and the stationary scroll plate <NUM> and then renders abnormal sounds and abrasion. In addition, the pressure relief low-speed rotation plate <NUM> further communicates the discharge space <NUM> with the place between the movable scroll plate <NUM> and the stationary scroll plate <NUM>, and can further balance the pressure difference between the discharge space <NUM> and the movable scroll plate <NUM> and the stationary scroll plate <NUM> to be able to reduce the resistance to discharge the pressure of the movable scroll plate <NUM> and the stationary scroll plate <NUM> when the scroll compressor <NUM> is started again, and then to improve the start-up performance of the scroll compressor <NUM>. In addition, the pressure relief low-speed rotation plate <NUM> has the advantages of a simple structure and low manufacturing costs.

In the present disclosure, the terms "first", "second" and "third" are used for the purpose of description only, and cannot be understood as indicating or implying relative importance, and the term of "multiple" indicates two or more, unless otherwise explicitly specified or defined. The terms "mounting", "connected with", "connection", "fixing" and the like should be understood in a broad sense, in some embodiments, the term "connection" may be a fixed connection, and may also be a removable connection, or an integral connection; and the term "connected with" may be a direct connection and may also be an indirect connection through an intermediary. A person of ordinary skills in the art could understand the specific meanings of the terms in the present disclosure according to specific situations.

In the description of the present disclosure, it needs to be understood that the orientation or position relations indicated by the terms of "upper", "lower", "left", "right", "front", "rear" and the like are based on the orientation or position relations shown in the accompanying drawings, and they are just intended to conveniently describe the present disclosure and simplify the description, and are not intended to indicate or imply that the devices or units as indicated should have specific orientations or should be configured or operated in specific orientations, and then should not be construed as limitations to the present application.

Claim 1:
A scroll compressor (<NUM>), comprising:
a housing (<NUM>);
a partition plate (<NUM>), which is provided in the interior of the housing (<NUM>) and which divides the interior of the housing (<NUM>) into a suction space (<NUM>) and a discharge space (<NUM>), and which is provided with a first through hole (<NUM>) to communicate the suction space (<NUM>) with the discharge space (<NUM>);
a rack (<NUM>), which is located in the suction space (<NUM>) in the interior of the housing (<NUM>), and wherein the rack (<NUM>) and the partition plate (<NUM>) being spaced apart;
a movable scroll plate (<NUM>), which is movably provided on the rack (<NUM>);
a stationary scroll plate (<NUM>), which is provided on the rack (<NUM>) and which cooperates with the movable scroll plate (<NUM>), and which is provided with a second through hole (<NUM>), and wherein the second through hole (<NUM>) communicating with the discharge space (<NUM>); and
a pressure relief low-speed rotation structure (<NUM>), which is provided on the stationary scroll plate (<NUM>), and communicates the second through hole (<NUM>) with the discharge space (<NUM>); wherein the pressure relief low-speed rotation structure (<NUM>) comprises:
a first slideway (<NUM>), provided in the stationary scroll plate (<NUM>) and located between the stationary scroll plate (<NUM>) and the partition plate (<NUM>); and
a pressure relief low-speed rotation plate (<NUM>), which is slidably arranged in the first slideway (<NUM>) and can abut on the stationary scroll plate (<NUM>), and a passing area between the discharge space (<NUM>) and the second through hole (<NUM>) is reduced when the pressure relief low-speed rotation plate (<NUM>) abuts on the stationary scroll plate (<NUM>); characterized in that
the pressure relief low-speed rotation plate (<NUM>) is provided with third through holes (<NUM>) and fourth through holes (<NUM>); when the pressure relief low-speed rotation plate (<NUM>) abuts on the stationary scroll plate (<NUM>), the stationary scroll plate (<NUM>) blocks the third through holes (<NUM>), and the fourth through holes (<NUM>) communicate the second through hole (<NUM>) with the discharge space (<NUM>).