CN212055115U - Scroll compressor with adjustable internal compression ratio and air conditioner - Google Patents

Abstract

The utility model provides a scroll compressor, air conditioner with adjustable internal compression ratio, the compressor includes: the vortex disc comprises a fixed vortex disc and a movable vortex disc, wherein a first accommodating cavity is formed in the radial center of the fixed vortex disc, and a fixed disc sliding block is arranged in the first accommodating cavity; a second accommodating cavity is formed at the radial center of the movable scroll plate, and a movable disc sliding block is arranged in the second accommodating cavity; the static disc sliding block and the movable disc sliding block can move in the axial direction, so that a compression cavity formed by the static disc sliding block, the movable disc sliding block, the static vortex disc and the movable vortex disc can be switched between a two-dimensional compression space and a three-dimensional compression space. The utility model discloses can effectively realize that the internal compression ratio can be adjusted as required for can adjust the size that increases the internal compression ratio or reduce the internal compression ratio according to the skew design operating mode of operating condition, can effectively reduce the compression loss, solve under the extreme operating condition, the internal and external compression ratio differs the energy loss that too big leads to, improves scroll compressor's efficiency.

Description

Scroll compressor with adjustable internal compression ratio and air conditioner

Technical Field

The utility model relates to a compressor technical field, concretely relates to scroll compressor, air conditioner with adjustable internal compression ratio.

Background

The conventional scroll compressor is a positive displacement compressor with a fixed internal compression ratio (the ratio of the exhaust pressure to the suction pressure of a pump body), the internal compression ratio of the conventional scroll compressor is only related to structural parameters of the pump body, and the conventional scroll compressor is designed according to a certain specific operating condition; the external compression ratio (ratio of condensing pressure to evaporating pressure) of the compressor is changed along with the operation condition of the system, and is closely related to parameters such as indoor and outdoor environment temperature and the like.

When the actual operation condition deviates from the design condition, the inner compression ratio is inconsistent with the outer compression ratio, so-called under-compression and over-compression can occur in the compressor, and additional energy loss is generated in the two processes, so that the indicating efficiency of the scroll compressor is reduced.

The operation compression ratio of a typical multi-compressor scroll compressor in the current market needs to cover the range of 1.5-8.0. Generally speaking, the difference between the indoor and outdoor ambient temperatures of the refrigeration in summer is small, and the compression is small; the temperature difference between the indoor environment and the outdoor environment of the heating chamber in winter is large, and the compression ratio is large. Due to the structural limitations of the conventional scroll compressor, the efficiency can only be indicated to be the highest in the design working condition. The larger the deviation between the operating condition and the design condition is, the larger the compression loss is.

Patent CN1262762C, a scroll compressor having stepped portions for reducing fluid leakage, mentions a scroll in which a spiral wall and an end disk are stepped, respectively, that is, the wrap height thereof is higher at the outer side of the spiral and lower at the center side. Such a compression structure is called three-dimensional compression, and can provide a higher internal compression ratio without increasing the diameter of the scroll, but the internal compression ratio is still a fixed value.

Patent CN 204061180U-a scroll compressor with variable internal volume ratio, proposes to provide one or more auxiliary exhaust holes and relief valve devices on the fixed scroll, and through the automatic pressure relief of the above devices, reduces the pressure ratio in the compressor, prevents the over-compression in the scroll compressor. The device can only solve the problem of over-compression, and the pressure relief leads to the reduction of the actual operation compression ratio of the scroll compressor. In order to meet the requirement of the operation range of the compressor, the scroll plate has to be designed under the working condition of large compression ratio, so that the diameter of the obtained scroll plate is large, and the risks of abrasion and leakage are greatly increased. Because the compression ratio of the design working condition is large, more operation working condition relief valves are in an opening state, and the central vortex cavity is in an invalid no-load state.

Because the conventional scroll compressor in the prior art designs the internal compression ratio according to a single working condition, the working conditions of large compression ratio and small compression ratio cannot be considered, the actual operation working condition deviates from the design working condition and generates larger compression loss, and the complicated and changeable working condition of the air conditioner has clear requirements; the scroll compressor with the pressure relief valve for regulation needs to be designed according to the working condition of high pressure ratio, and the size of the compressor is large; scroll compressor with pressure relief valve is adjusted, when the pressure relief valve was opened, the central vortex chamber did not carry out effective compression, and the friction and wear area is big, technical problem such as leakage risk height, consequently the utility model discloses research design a scroll compressor, air conditioner with adjustable internal compression ratio.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the scroll compressor among the prior art and compressing the ratio in the design according to single operating mode, when leading to the skew design operating mode of actual operation operating mode, produce the defect of great compression loss to provide a scroll compressor, air conditioner with adjustable internal compression ratio.

In order to solve the above problem, the utility model provides an interior compression ratio adjustable scroll compressor, it includes:

the fixed scroll comprises a fixed scroll and a movable scroll, wherein a first accommodating cavity is formed in the radial center of the fixed scroll, a fixed disc sliding block is arranged in the first accommodating cavity, the fixed disc sliding block is also provided with a wrap tooth, and the wrap tooth of the fixed disc sliding block is engaged with the wrap tooth of the fixed scroll so that the wrap tooth of the fixed disc sliding block is spirally extended in the radial direction of the wrap tooth of the fixed scroll;

a second accommodating cavity is formed in the radial center of the movable scroll plate, a movable disc sliding block is arranged in the second accommodating cavity, the movable disc sliding block is also provided with a scroll tooth, and the scroll tooth of the movable disc sliding block is engaged with the scroll tooth of the movable scroll plate so that the scroll tooth of the movable disc sliding block is spirally extended in the radial direction;

the first accommodating cavity is communicated with the second accommodating cavity in the axial direction of the compressor, the static disc sliding block is connected with the movable disc sliding block in the axial direction, and the static disc sliding block and the movable disc sliding block can move in the axial direction, so that a compression cavity formed by the static disc sliding block, the movable disc sliding block, the static scroll disc and the movable scroll disc can be switched between a two-dimensional compression space and a three-dimensional compression space.

Preferably, when the static disk slide block and the movable disk slide block integrally move to the uppermost top dead center along the axial direction, the compression cavity forms the two-dimensional compression space; when the static disc sliding block and the movable disc sliding block integrally move to the bottom dead center at the lowest end along the axial direction, the compression cavity forms the three-dimensional compression space.

Preferably, a fixed disk cover plate is further arranged on the end face, far away from the movable scroll, of the fixed scroll, so that a closed cavity is formed between the fixed disk cover plate and the fixed scroll, the first accommodating cavity is communicated with the closed cavity, so that the end face, facing the fixed disk cover plate, of the fixed disk slider can bear the pressure of gas in the closed cavity, and exhaust gas or suction gas of the scroll compressor can be introduced into the closed cavity.

Preferably, when the suction gas is introduced into the closed cavity, the static disc sliding block and the movable disc sliding block are pushed by pressure to integrally move towards the static disc cover plate, so as to form the two-dimensional compression space; when the closed cavity is filled with the exhaust gas, the static disc sliding block and the movable disc sliding block are pushed by the pressure of the exhaust gas to integrally move towards the direction of the movable scroll plate so as to form the three-dimensional compression space.

Preferably, the scroll compressor further comprises a first pipeline, one end of the first pipeline is communicated to the closed cavity, the other end of the first pipeline is communicated with gas at the exhaust end of the scroll compressor, and a first control valve is arranged on the first pipeline; the scroll compressor further comprises a second pipeline, one end of the second pipeline is communicated to the closed cavity, the other end of the second pipeline is communicated with gas at the air suction end of the scroll compressor, and a second control valve is arranged on the second pipeline.

Preferably, a first connecting port and a second connecting port are arranged on the static disc cover plate, the first connecting port can communicate the first pipeline with the closed cavity, and the second connecting port can communicate the second pipeline with the closed cavity; and/or an exhaust port is further arranged on the fixed scroll cover plate and communicated with an exhaust channel on the fixed scroll.

Preferably, an end face of the movable disk slider on a side away from the stationary disk slider is subjected to an intermediate pressure, wherein the intermediate pressure is a pressure generated by gas inside a housing of the scroll compressor, and the magnitude of the intermediate pressure > a suction pressure of the scroll compressor, and the magnitude of the intermediate pressure < a discharge pressure of the scroll compressor.

Preferably, a side end surface of the movable disc slider, which is far away from the stationary disc slider, bears suction pressure, where the suction pressure is pressure generated by sucking gas from a suction end of the scroll compressor, and a side end surface of the movable disc slider, which is far away from the stationary disc slider, is further connected and provided with an elastic structure, and the elastic structure can apply an elastic force to the movable disc slider in a direction towards the stationary disc slider.

Preferably, when both top dead center and bottom dead center are included: the upper end of the static disk sliding block is abutted against the static disk cover plate, and the position is the upper stop point; move on the vortex dish, and be located the second holds and still is provided with the structure of stopping in the chamber, it can be right to stop the structure stop the lower terminal surface of driving disk slider, just the lower extreme of driving disk slider with position when stopping the structure butt does bottom dead center.

The utility model also provides an air conditioner, it includes preceding arbitrary the scroll compressor with adjustable internal compression ratio.

The utility model provides a pair of scroll compressor, air conditioner with adjustable internal compression ratio have following beneficial effect:

the utility model discloses a set up first chamber and set up the quiet set of slider in quiet vortex dish wherein, the vortex of quiet set of slider is rolled up the tooth and is met and extend with the scroll tooth of quiet vortex dish, can make quiet set of slider and quiet vortex dish cooperate together and form and move the spiral tooth and carry out the complex tooth structure with moving the spiral tooth, set up the second chamber and set up the driving disk slider in moving the vortex dish wherein, the vortex of driving disk slider is rolled up the tooth and is met and extend for the spiral tooth of moving the vortex dish, can make driving disk slider and moving the vortex dish cooperate together and form and carry out the complex tooth structure with quiet spiral tooth, and quiet set of slider and driving disk slider can move along axial direction, thereby make quiet set of slider, driving disk slider, quiet vortex dish and the compression chamber that moves the vortex dish encloses change to can switch over between two-dimensional compression space and three-dimensional compression space, effectively realize that the internal compression ratio can be adjusted as required for can adjust the size that increases the internal compression ratio or reduce the internal compression ratio according to the skew design operating mode of operating condition, can effectively reduce the compression loss, solve under the extreme operating condition, the energy loss that the difference is too big to lead to inside and outside compression ratio improves scroll compressor's efficiency. Because three-dimensional compression is selected for use when high compression ratio, can realize bigger internal compression ratio under less shell footpath to effectively guarantee that the central vortex chamber carries out effective compression, pump body friction area is little, the leakage risk is low.

Drawings

FIG. 1 is an exploded view of a scroll compressor with adjustable internal compression ratio according to the present invention;

FIG. 2 is a schematic diagram of a two-dimensional compression mode of the scroll compressor with adjustable internal compression ratio according to the present invention;

FIG. 3 is a schematic diagram of the three-dimensional compression mode of the scroll compressor with adjustable internal compression ratio according to the present invention;

FIG. 4 is a schematic diagram of the control structure of the main embodiment of the scroll compressor with adjustable internal compression ratio of the present invention;

fig. 5 is a schematic control structure diagram of an alternative embodiment of the scroll compressor with adjustable internal compression ratio according to the present invention.

The reference numerals are represented as:

1. a stationary disc cover plate; 2. a stationary disc slider; 3. a fixed scroll; 30. a first accommodating chamber; 4. a movable disc sliding block; 5. a movable scroll; 50. a second accommodating chamber; 101. a first connection port; 102. an exhaust port; 103. a second connection port; 110. a first pipeline; 120. a second pipeline; 301. an air suction port; 501. a movable disc bearing; 6. sealing the cavity; 71. a first control valve; 72. a second control valve; 8. and (3) an elastic structure.

Detailed Description

As shown in fig. 1 to 5, the present invention provides a scroll compressor with adjustable internal compression ratio, which comprises:

a fixed scroll 3 and a movable scroll 5, wherein a first accommodating cavity 30 is formed at a radial center position of the fixed scroll 3, a fixed disc slider 2 is arranged in the first accommodating cavity 30, the fixed disc slider 2 also has a wrap tooth, and the wrap tooth of the fixed disc slider 2 is engaged with the wrap tooth of the fixed scroll 3 so that the wrap tooth of the fixed disc slider 2 is a spiral extension of the wrap tooth of the fixed scroll 3 in a radial direction;

a second accommodating cavity 50 is formed at the radial center position of the movable scroll 5, a movable disc slider 4 is arranged in the second accommodating cavity 50, the movable disc slider 4 also has a scroll tooth, and the scroll tooth of the movable disc slider 4 is engaged with the scroll tooth of the movable scroll 5, so that the scroll tooth of the movable disc slider 4 is a spiral extension of the scroll tooth of the movable scroll 5 in the radial direction;

the first accommodating cavity 30 and the second accommodating cavity 50 are communicated in the axial direction of the compressor, the static disc sliding block 2 is connected with the movable disc sliding block 4 in the axial direction, and the static disc sliding block 2 and the movable disc sliding block 4 can move in the axial direction, so that a compression cavity defined by the static disc sliding block 2, the movable disc sliding block 4, the static scroll 3 and the movable scroll 5 can be switched between a two-dimensional compression space and a three-dimensional compression space.

The utility model discloses a set up first chamber and set up the quiet set of slider in quiet vortex dish wherein, the vortex of quiet set of slider is rolled up the tooth and is met and extend with the scroll tooth of quiet vortex dish, can make quiet set of slider and quiet vortex dish cooperate together and form and move the spiral tooth and carry out the complex tooth structure with moving the spiral tooth, set up the second chamber and set up the driving disk slider in moving the vortex dish wherein, the vortex of driving disk slider is rolled up the tooth and is met and extend for the spiral tooth of moving the vortex dish, can make driving disk slider and moving the vortex dish cooperate together and form and carry out the complex tooth structure with quiet spiral tooth, and quiet set of slider and driving disk slider can move along axial direction, thereby make quiet set of slider, driving disk slider, quiet vortex dish and the compression chamber that moves the vortex dish encloses change to can switch over between two-dimensional compression space and three-dimensional compression space, effectively realize that the internal compression ratio can be adjusted as required for can adjust the size that increases the internal compression ratio or reduce the internal compression ratio according to the skew design operating mode of operating condition, can effectively reduce the compression loss, solve under the extreme operating condition, the energy loss that the difference is too big to lead to inside and outside compression ratio improves scroll compressor's efficiency. Because three-dimensional compression is selected for use when high compression ratio, can realize bigger internal compression ratio under less shell footpath to effectively guarantee that the central vortex chamber carries out effective compression, pump body friction area is little, the leakage risk is low.

The utility model provides a novel scroll compressor structure has two kinds of mode of operation, is the two-dimensional compression mode (figure 2) to the little compression ratio operating mode and the three-dimensional compression mode (figure 3) to the big compression ratio operating mode respectively. According to the set working condition, the required operation compression ratio is solved, and a more proper operation mode is automatically selected manually or by a control program.

In order to realize the design that the compression cavity has two compression ratio modes, the utility model is a pump body structure (figure 1), a movable disc and a static disc are respectively divided into a slide block structure of a central cavity and a fixed structure at the outer side, and the movable disc and the static disc jointly form a finished molded line and the compression cavity; the shape characteristics of the two sliding blocks respectively correspond to the tooth top and the tooth bottom of the vortex tooth, and the two sliding blocks can be matched with each other and cannot interfere in a three-dimensional compression mode; after the two sliding blocks are installed, the two sliding blocks are axially in series connection, and the sliding blocks can axially move relative to the scroll and have the same movement stroke.

The utility model discloses a slider structural feature is according to dynamic disk addendum, quiet set tooth bottom for the example, and the two shape characteristic also can trade.

Preferably, as shown in fig. 2, when the fixed disk slider 2 and the movable disk slider 4 integrally move in the axial direction to the uppermost top dead center, the compression cavity is formed as the two-dimensional compression space; as shown in fig. 3, when the stationary disk slider 2 and the movable disk slider 4 integrally move in the axial direction to the bottom dead center at the lowermost end, the compression cavity forms the three-dimensional compression space. This is the further preferred structural style of the utility model, as shown in fig. 2, when the static disk slider and the movable disk slider move to the top, the lower end face of the static disk slider is flush with the upper end face of the inner cavity of the static scroll, that is, the axial height of the compression cavity part formed by the static disk slider, the movable disk slider, the static scroll and the movable scroll and located at the radial center part is equal to the axial height of the compression cavity at the radial outer side, so the formed compression cavity is a two-dimensional compression space with equal height, at this time, because the internal compression ratio of the two-dimensional compression is smaller than the three-dimensional compression, the two-dimensional compression space is suitable for the working condition that the internal compression ratio is smaller than the three-dimensional compression working; as shown in fig. 3, when the static disk slider and the movable disk slider move integrally to the lowest end, the lower end surface of the static disk slider is not flush with the upper end surface of the inner cavity of the static scroll, that is, the axial height of the compression cavity part located at the radial center part formed by the static disk slider, the movable disk slider, the static scroll and the movable scroll is smaller than the axial height of the compression cavity located at the radial outer side, so that the formed compression cavity is a three-dimensional compression space with a high radial outer side height and a low radial inner side height, and the three-dimensional compression space is suitable for the working condition of designing a larger internal compression ratio because the internal compression ratio is smaller than the two-dimensional compression ratio.

Preferably, a fixed disk cover plate 1 is further arranged on the end face of one side of the fixed scroll 3, which is far away from the movable scroll 5, so that a closed cavity 6 is formed between the fixed disk cover plate 1 and the fixed scroll 3, the first accommodating cavity 30 is communicated with the closed cavity 6, so that the end face, facing the fixed disk cover plate 1, of the fixed disk slider 2 can bear the pressure of the gas in the closed cavity 6, and the exhaust gas or the suction gas of the scroll compressor can be introduced into the closed cavity 6. This is the utility model discloses a further preferred structural style, through the quiet dish apron that sets up in quiet vortex dish upper end, can form inclosed appearance chamber between quiet dish apron and quiet vortex dish up end effectively to can let in the gas of different pressure according to operating condition through this airtight appearance chamber, thereby realize the motion control to quiet dish slider and driving disk slider, realize the effective switching between two-dimensional compression space and the three-dimensional compression space.

Preferably, when the suction gas is introduced into the closed cavity 6, the static disk slide block 2 and the movable disk slide block 4 are pushed by pressure to integrally move towards the static disk cover plate 1, so as to form the two-dimensional compression space; when the exhaust gas is introduced into the closed cavity 6, the static disk sliding block 2 and the movable disk sliding block 4 are pushed by the pressure of the exhaust gas to integrally move towards the movable scroll 5, so that the three-dimensional compression space is formed. The utility model discloses a sealed appearance chamber lets in the preferred structural style of different pressure gas, when needs realize less internal compression ratio, then lets in the less inspiration gas of pressure to sealed appearance chamber, and then makes quiet dish slider and driving disk slider upwards promoted by the pressure of lower extreme (lower extreme pressure is greater than upper end pressure and forms the pressure differential), and then forms two-dimentional compression space, realizes the compression of less internal pressure ratio; when a large internal compression ratio needs to be realized, exhaust gas with large pressure is introduced into the closed containing cavity, so that the static disc sliding block and the dynamic disc sliding block are pushed downwards by the pressure at the upper end (the pressure at the upper end is larger than the pressure at the lower end to form a pressure difference), a two-dimensional compression space is formed, and the compression with the large internal compression ratio is realized.

Preferably, the scroll compressor further comprises a first pipeline 110, one end of the first pipeline 110 is communicated to the closed cavity 6, and the other end of the first pipeline 110 is communicated with the gas at the exhaust end of the scroll compressor, and a first control valve 71 is arranged on the first pipeline 110; the scroll compressor further comprises a second pipeline 120, one end of the second pipeline 120 is communicated to the closed cavity 6, the other end of the second pipeline 120 is communicated with the gas at the suction end of the scroll compressor, and a second control valve 72 is arranged on the second pipeline 120. This is the utility model discloses a further intelligent control's structural style, through the setting of two different pipelines and through the different modes of inserting the gas of breathing in or exhaust gas realize letting in different pressure's gas in airtight appearance chamber to the realization is to the driving action of quiet set slider and driving disk slider, realizes the switching action of different internal compression ratios.

Preferably, a first connection port 101 and a second connection port 103 are arranged on the stationary cover plate 1, the first connection port 101 can communicate the first pipeline 110 with the closed cavity 6, and the second connection port 103 can communicate the second pipeline 120 with the closed cavity 6; and/or an exhaust port 102 is further arranged on the fixed scroll cover plate 1, and the exhaust port 102 is communicated with an exhaust channel on the fixed scroll 3. The gas that can realize the different pressure of intercommunication gets into airtight appearance intracavity through two different connectors on the quiet dish apron, and the gas vent is used for the high-pressure exhaust discharge in with the compression intracavity.

As shown in fig. 4, preferably, an end surface of the movable disk slider 4 on a side away from the stationary disk slider 2 receives an intermediate pressure, wherein the intermediate pressure is a pressure generated by gas inside a housing of the scroll compressor, and the magnitude of the intermediate pressure > a suction pressure of the scroll compressor, and the magnitude of the intermediate pressure < a discharge pressure of the scroll compressor. The utility model is a structural style of the main implementation mode when the structure is controlled, namely, the upper end of the static disk slide block is introduced with suction pressure or exhaust pressure, and the lower end of the dynamic disk slide block is introduced with intermediate pressure to realize the purpose of controlling the static disk slide block and the dynamic disk slide block to move up and down; if the air suction pressure is introduced into the closed cavity, the static disc sliding block and the dynamic disc sliding block are driven by the pressure difference to move upwards to form a two-dimensional compression mode because the air suction pressure is smaller than the intermediate pressure at the lower end, and the switching of the internal compression ratio is effectively realized.

As shown in fig. 5, preferably, a side end surface of the movable disc slider 4 away from the stationary disc slider 2 is subjected to a suction pressure, where the suction pressure is a pressure generated by sucking a gas from a suction end of the scroll compressor, and an elastic structure 8 is further connected to a side end surface of the movable disc slider 4 away from the stationary disc slider 2, where the elastic structure 8 can apply an elastic force to the movable disc slider 4 in a direction toward the stationary disc slider 2. This is the structural style of the alternative embodiment of the present invention, the lower end is the suction pressure, therefore, the elastic force is generated by increasing the elastic structure, so that the sum of the elastic force and the suction pressure is located between the suction pressure and the exhaust pressure, the elastic structure is preferably a spring, i.e. the upper end of the static disk slider is connected with the suction pressure or the exhaust pressure, the lower end of the dynamic disk slider is connected with the suction pressure and the elastic force to control the static disk slider and the dynamic disk slider to move up and down, for example, if the suction pressure is connected to the closed cavity, the exhaust pressure is greater than the suction pressure and the elastic force at the lower end, so the static disk slider and the dynamic disk slider are driven by the pressure difference to; if the suction pressure is introduced into the closed cavity, the static disc sliding block and the dynamic disc sliding block are driven by the pressure difference to move upwards to form a two-dimensional compression mode because the suction pressure is smaller than the suction pressure plus the elastic force at the lower end, and the switching of the internal compression ratio is effectively realized.

Preferably, when both top dead center and bottom dead center are included: the upper end of the static disk sliding block 2 is abutted against the static disk cover plate 1, and the position is the upper stop point; the movable scroll 5 is preferably located in the second accommodating cavity 50, and a locking structure (not shown) is further provided, the locking structure can lock the lower end surface of the movable disc slider 4, and the position of the lower end of the movable disc slider 4 when abutting against the locking structure is the lower dead point. This is the utility model discloses an effective realization structural style of top dead center and bottom dead center, top dead center realize, effectively realize spacing to quiet dish slider motion upper limit position through quiet dish apron, and bottom dead center realizes, effectively realizes spacing to quiet dish slider motion lower limit position through the structure that ends.

The utility model also provides an air conditioner, it includes preceding arbitrary the scroll compressor with adjustable internal compression ratio.

The utility model also provides a be applicable to preceding any one scroll compressor's with adjustable internal compression ratio control method, wherein:

when further comprising the first line 110, the first control valve 71, the second line 120 and the second control valve 72: when the first internal compression ratio compression is required, controlling the first control valve 71 to close and simultaneously controlling the second control valve 72 to open; when a second internal compression ratio compression is required, the first control valve 71 is controlled to open while the second control valve 72 is controlled to close, wherein the first internal compression ratio < the second internal compression ratio.

This is the utility model discloses a preferred control method that internal compression ratio switches, let in the exhaust pressure promptly and promote static slider and driving disk slider downwards, realize three-dimensional compression space's compression mode, let in suction pressure and promote static slider and driving disk slider upwards, realize two-dimensional compression space's compression mode.

The utility model discloses the method (fig. 4) that uses gas pressure differential to switch of main embodiment, the control mode is as follows:

the pressure of the back of the movable disc is always intermediate pressure, the back of the static disc is provided with a variable pressure cavity structure by the cover plate of the static disc, and the pressure cavity is communicated with one of air suction or air exhaust according to requirements. The static disc cover plate is provided with an upper limiting surface structure, and the movable disc crank portion is provided with a lower limiting surface structure.

As shown, when SV1 (first control valve 71) is closed and SV2 (second control valve 72) is open, the pressure chamber at the back of the static disc is communicated with the suction gas, the two axially-connected center chamber sliders move toward the static disc side under the action of pressure difference, and when the axial upper limit surface is reached, the compressor is in the two-dimensional compression mode; when SV1 is opened and SV2 is closed, a pressure cavity at the back of the static disc is communicated with exhaust gas, two central cavity sliding blocks which are axially connected in series move towards the side of the dynamic disc under the action of pressure difference, and when the pressure reaches an axial lower limiting surface, the compressor is in a three-dimensional compression mode.

Therefore, the pressure state of the pressure chamber at the back of the static disc can be controlled to switch different operation modes.

The utility model discloses the control method of alternative embodiment, even with the method (fig. 5) that gas pressure differential and spring combination switch, the control mode is as follows:

compared with the main embodiment, the pressure of the back of the movable disc is formed by suction pressure, a spring structure is arranged between the sliding block of the movable disc and the lower limiting surface, and the pressure cavity of the back of the static disc is arranged in the same way as the main embodiment.

As shown in the figure, when SV1 (first control valve 71) is closed, SV2 (second control valve 72) is opened, a pressure cavity at the back of a static disc is communicated with a suction gas, the pressure difference acting force at two sides of two axially-connected central cavity sliders in series is smaller than the acting force of a spring, the spring bounces, the sliders move towards the side of the static disc, and when an axially-upper limiting surface is reached, the compressor is in a two-dimensional compression mode; when SV1 is opened and SV2 is closed, a pressure cavity at the back of the static disc is communicated with exhaust gas, the pressure difference between two sides of two axially-connected center cavity sliding blocks is greater than the acting force of a spring, the spring is compressed, the sliding blocks move towards the side of the dynamic disc, and when the sliding blocks reach an axially-downward limiting surface, the compressor is in a three-dimensional compression mode.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A scroll compressor with adjustable internal compression ratio, comprising: the method comprises the following steps:

the scroll compressor comprises a fixed scroll (3) and a movable scroll (5), wherein a first accommodating cavity (30) is formed in the radial center position of the fixed scroll (3), a fixed disc sliding block (2) is arranged in the first accommodating cavity (30), the fixed disc sliding block (2) is also provided with a scroll wrap, and the scroll wrap of the fixed disc sliding block (2) is engaged with the scroll wrap of the fixed scroll (3) so that the scroll wrap of the fixed disc sliding block (2) is spirally extended in the radial direction of the scroll wrap of the fixed scroll (3);

a second accommodating cavity (50) is formed in the radial center of the movable scroll (5), a movable scroll slider (4) is arranged in the second accommodating cavity (50), the movable scroll slider (4) is also provided with a scroll tooth, and the scroll tooth of the movable scroll slider (4) is engaged with the scroll tooth of the movable scroll (5) so that the scroll tooth of the movable scroll slider (4) is spirally extended in the radial direction of the scroll tooth of the movable scroll (5);

the first containing cavity (30) is communicated with the second containing cavity (50) in the axial direction of the compressor, the static disc sliding block (2) is connected with the movable disc sliding block (4) in the axial direction, and the static disc sliding block (2) and the movable disc sliding block (4) can move in the axial direction, so that a compression cavity defined by the static disc sliding block (2), the movable disc sliding block (4), the static vortex disc (3) and the movable vortex disc (5) can be switched between a two-dimensional compression space and a three-dimensional compression space.

2. The internal compression ratio adjustable scroll compressor according to claim 1, wherein:

when the static disc sliding block (2) and the movable disc sliding block (4) integrally move to the uppermost top dead center along the axial direction, the compression cavity forms the two-dimensional compression space; when the static disc sliding block (2) and the movable disc sliding block (4) integrally move to the bottom dead center at the lowest end along the axial direction, the compression cavity forms the three-dimensional compression space.

3. The internal compression ratio-adjustable scroll compressor according to claim 1 or 2, wherein:

the vortex compressor is characterized in that a static disc cover plate (1) is further arranged on the end face of one side, far away from the movable vortex disc (5), of the static vortex disc (3), so that a sealed containing cavity (6) is formed between the static disc cover plate (1) and the static vortex disc (3), the first containing cavity (30) is communicated with the sealed containing cavity (6) to enable the end face, facing the static disc cover plate (1), of the static disc sliding block (2) to bear the pressure of gas in the sealed containing cavity (6), and exhaust gas or suction gas of the vortex compressor can be introduced into the sealed containing cavity (6).

4. The internal compression ratio adjustable scroll compressor according to claim 3, wherein:

when the air suction gas is introduced into the closed cavity (6), the static disc sliding block (2) and the movable disc sliding block (4) are pushed by pressure to integrally move towards the static disc cover plate (1) so as to form the two-dimensional compression space; when the closed cavity (6) is filled with the exhaust gas, the static disc sliding block (2) and the movable disc sliding block (4) are pushed by the pressure of the exhaust gas to integrally move towards the movable scroll (5) so as to form the three-dimensional compression space.

5. The internal compression ratio adjustable scroll compressor according to claim 3, wherein:

the gas compressor further comprises a first pipeline (110), one end of the first pipeline (110) is communicated to the closed cavity (6), the other end of the first pipeline (110) is communicated with gas at the exhaust end of the scroll compressor, and a first control valve (71) is arranged on the first pipeline (110); the scroll compressor further comprises a second pipeline (120), one end of the second pipeline (120) is communicated to the closed cavity (6), the other end of the second pipeline is communicated with gas at the suction end of the scroll compressor, and a second control valve (72) is arranged on the second pipeline (120).

6. The internal compression ratio adjustable scroll compressor according to claim 5, wherein:

a first connecting port (101) and a second connecting port (103) are arranged on the static disc cover plate (1), the first connecting port (101) can communicate the first pipeline (110) with the closed cavity (6), and the second connecting port (103) can communicate the second pipeline (120) with the closed cavity (6); and/or an exhaust port (102) is further arranged on the fixed disc cover plate (1), and the exhaust port (102) is communicated with an exhaust channel on the fixed scroll (3).

7. The internal compression ratio adjustable scroll compressor according to claim 3, wherein:

one side end face, far away from the static disc sliding block (2), of the movable disc sliding block (4) bears intermediate pressure, wherein the intermediate pressure is pressure generated by gas inside a shell of the scroll compressor, and the size of the intermediate pressure is larger than suction pressure of the scroll compressor, and the size of the intermediate pressure is smaller than exhaust pressure of the scroll compressor.

8. The internal compression ratio adjustable scroll compressor according to claim 3, wherein:

keep away from on the moving disk slider (4) one side terminal surface department of quiet dish slider (2) bears suction pressure, wherein suction pressure is by scroll compressor's suction end inhales the pressure that gas and produce, just keep away from on the moving disk slider (4) one side terminal surface of quiet dish slider (2) still is connected and is provided with elastic construction (8), elastic construction (8) can be right moving disk slider (4) are exerted the orientation the elastic force of quiet dish slider (2) direction.

9. The internal compression ratio adjustable scroll compressor according to claim 3, wherein:

when both top dead center and bottom dead center are included: the upper end of the static disc sliding block (2) is abutted against the static disc cover plate (1) at the upper dead point; move on vortex dish (5), and be located still be provided with in the second holds chamber (50) and stop the structure, it can be right to stop the structure the lower terminal surface of driving disk slider (4) stops, just the lower extreme of driving disk slider (4) with position when stopping the structure butt does bottom dead center.

10. An air conditioner, characterized in that: a scroll compressor with adjustable internal compression ratio comprising any one of claims 1 to 9.

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