阅读说明：本技术 压缩机变容结构、控制方法、压缩机及空调器 (Compressor variable-capacity structure, control method, compressor and air conditioner ) 是由 李自好 樊峰刚 赵旭敏 彭慧明 张洪玮 于 2019-10-24 设计创作，主要内容包括：本发明提供一种压缩机变容结构、控制方法、压缩机及空调器,压缩机变容结构包括：第一气缸,第一气缸内安装有第一滚子；驱动轴,驱动轴上设有联轴装置,联轴装置具有两个工作状态,第一状态下,联轴装置将第一滚子与驱动轴联接,第一滚子在驱动轴驱动下偏心转动,第一滚子在第一气缸内进行压缩作业,第二状态下,联轴装置将第一滚子与驱动轴脱开,驱动轴空转。本发明压缩机变容结构相较于现有技术,变容逻辑简单,控制方式简单,能够有效降低成本,直接使气缸停止运转,降低了能量损耗,节省了滚子与气缸的无效磨损,变容方式安全高效。(The invention provides a compressor variable volume structure, a control method, a compressor and an air conditioner, wherein the compressor variable volume structure comprises the following components: the first roller is installed in the first cylinder; the driving shaft is provided with a coupling device, the coupling device has two working states, in the first state, the coupling device connects a first roller with the driving shaft, the first roller eccentrically rotates under the driving of the driving shaft, the first roller performs compression operation in a first cylinder, in the second state, the coupling device separates the first roller from the driving shaft, and the driving shaft idles. Compared with the prior art, the variable-capacitance structure of the compressor has the advantages of simple variable-capacitance logic and simple control mode, can effectively reduce the cost, directly stops the operation of the cylinder, reduces the energy loss, saves the ineffective abrasion of the roller and the cylinder, and is safe and efficient in variable-capacitance mode.)

1. A compressor displacement structure, comprising:

the device comprises a first cylinder (1), wherein a first roller (2) is installed in the first cylinder (1);

the driving shaft (3), be equipped with coupling device (4) on driving shaft (3), coupling device (4) have two operating condition, under the first state, coupling device (4) will first roller (2) with driving shaft (3) hookup, first roller (2) are in eccentric rotation under driving shaft (3) drive, first roller (2) are in carry out the compression operation in first cylinder (1), under the second state, coupling device (4) will first roller (2) with driving shaft (3) break away from, driving shaft (3) idle running.

2. Compressor varactor structure according to claim 1, characterized in that the coupling device (4) comprises a thrust piece (5), at least one separation structure (6), the thrust piece (5) being movable along the drive shaft (3), the at least one separation structure (6) coupling or uncoupling the first roller (2) with the drive shaft (3) following the movement of the thrust piece (5).

3. Compressor varactor structure according to claim 1, characterized in that the coupling device (4) comprises an eccentric sleeve (7), a thrust piece (5), at least one disengaging structure (6), the eccentric sleeve (7) being coaxially mounted inside the first roller (2), the drive shaft (3) being mounted in the eccentric drive bore, the thrust piece (5) being movable along the drive shaft (3), the at least one disengaging structure (6) coupling or uncoupling the eccentric sleeve (7) to or from the drive shaft (3) following the movement of the thrust piece (5).

4. Compressor varactor structure according to claim 3, characterized in that a shaft hole (8) is provided in the drive shaft (3), and the thrust piece (5) is mounted in the shaft hole (8), the thrust piece (5) moving along the shaft hole (8).

5. The compressor variable volume structure according to claim 4, wherein a clutch chamber (9) is provided on the driving shaft (3), the clutch chamber (9) communicates the shaft hole (8) with the outer wall of the driving shaft (3), a coupling groove (10) is correspondingly provided on the inner wall of the eccentric sleeve (7), the separator (6) can move radially in the clutch chamber (9), the separator (6) moves radially outward, the separator (6) is engaged with the coupling groove (10), the eccentric sleeve (7) is coupled with the driving shaft (3), the separator (6) moves radially inward, the separator (6) is disengaged from the coupling groove (10), and the eccentric sleeve (7) is disengaged from the driving shaft (3).

6. Compressor varactor structure according to claim 4, characterized in that the thrust piece (5) is provided with a recess (11) and a protrusion (12) arranged along the axial direction, the separation structure (6) changes its position along the radial direction of the drive shaft (3) with the axial movement of the thrust piece (5), the separation structure (6) is at the distal radial end when the separation structure (6) contacts the protrusion (12), the coupling device (4) is in the first operating state, the separation structure (6) is at the proximal radial end when the separation structure (6) is released from the recess (11), and the coupling device (4) is in the second operating state.

7. Compressor displacement-changing structure according to any of claims 3-6, wherein the separation structure (6) is any of a ball, a sliding pin, a slider.

8. Compressor varactor structure according to claim 7, characterized in that the thrust piece (5) further comprises hook elements (13), the hook elements (13) corresponding one-to-one to the separation structures (6), the hook elements (13) being arranged radially along the thrust piece (5), the hook elements (13) being configured to hook back the separation structures (6) at a radially distal end to a radially proximal end upon axial movement of the thrust piece (5).

9. Compressor displacement-changing structure according to claim 8, wherein the separation structure (6) is a ball, and wherein the hook (13) comprises a support section (14), a working section (15), the working section (15) ending in a curve towards the separation structure (6), the working section (15) being able to guide the movement of the separation structure (6) by means of a curved arc.

10. Compressor displacement-changing structure according to claim 9, characterized in that the drive shaft (3) is provided with a slide groove (16) for accommodating the hook member (13) for axial movement.

11. Compressor displacement-volume structure according to claim 9, characterized in that the separation structure (6) has two, the hook-shaped elements (13) have two, the two separation structures (6) are radially symmetrically arranged, and the two hook-shaped elements (13) are radially symmetrically arranged.

12. Compressor displacement volume according to claim 11, wherein the eccentric sleeve (7) has an inner diameter D3, the drive shaft (3) has an outer diameter D1, D1 < D3, and the drive shaft (3) is clearance-fitted to the eccentric sleeve (7); the radial distance of the recesses (11) is D5, the radial distance of the protrusions (12) is D4, the radial distance of the separation structure (6) is Φ, wherein D5+2 Φ < D3, and D4+2 Φ > D3.

13. Compressor capacity-changing structure according to claim 11, characterized in that the distance between the ends of the working sections (15) of the two hooks (13) is D2, the outer diameter of the drive shaft (3) is D1, D2 ≦ D1.

14. Compressor displacement-changing structure according to any of claims 8-13, wherein the hook-shaped element (13) is of sheet metal construction, and the width of the support section (14) decreases in the radial direction of the drive shaft (3).

15. Compressor varactor structure according to claim 14, characterized in that it further comprises a control structure for driving the thrust piece (5) in translation along the axial hole (8).

16. Compressor varactor structure according to claim 15, characterized in that the control structure comprises an electromagnetic generator (17) mounted on the compressor housing, and further comprises an electromagnetic absorption part (18) mounted at the axial end of the thrust piece (5), the electromagnetic generator (17) and the electromagnetic absorption part (18) repel or attract each other to control the axial movement of the thrust piece (5).

17. Compressor varactor structure according to claim 16, characterized in that the electromagnetic attraction (18) is a permanent magnet, the polarity of which is distributed axially along the thrust piece (5).

18. Compressor varactor structure according to claim 15, characterized in that the control structure comprises a push cylinder (19) mounted on the compressor housing, a push rod (20) of the push cylinder (19) is connected to the thrust piece (5), the push cylinder (19) is in communication with the compressor high-pressure line, the push cylinder (19) is externally connected with a controller, and the controller controls the direction of the air flow to realize the push-out or pull-back of the push rod (20).

19. A compressor displacement varying structure according to any one of claims 15 to 18, further comprising a sensor capable of detecting system output cooling capacity, and/or compressor speed, and/or room temperature, to determine whether or not displacement is to be performed.

20. A method of controlling a variable capacity structure of a compressor according to claim 16, comprising: when the capacity is changed, current is introduced into the electromagnetic generator (17), the electromagnetic generator (17) and the electromagnetic adsorption part (18) repel each other, the thrust piece (5) is far away from the electromagnetic generator (17) along the axial direction, the separation structure (6) is in contact with the convex part (12), the separation structure (6) extends out of the clutch cavity (9), the tail end of the separation structure (6) is matched with the connecting groove (10), the eccentric shaft sleeve (7) is connected with the driving shaft (3), and the first roller (2) moves to perform compression operation;

when the capacity is not changed, reverse current is introduced into the electromagnetic generator (17), the electromagnetic generator (17) and the electromagnetic adsorption part (18) are attracted, the thrust piece (5) is close to the electromagnetic generator (17) along the axial direction, the separation structure (6) is contacted with the concave part (11), the separation structure (6) retracts into the clutch cavity (9), the eccentric shaft sleeve (7) is separated from the driving shaft (3), and the driving shaft (3) idles.

21. A method of controlling a variable capacity structure of a compressor according to claim 18, comprising: when the capacity is changed, the controller controls the flow direction of air flow, the push rod (20) drives the thrust piece (5) to be far away from the electromagnetic generator (17) along the axial direction, the separation structure (6) is in contact with the convex part (12), the separation structure (6) extends out of the clutch cavity (9), the tail end of the separation structure (6) is matched with the connecting groove (10), the eccentric shaft sleeve (7) is connected with the driving shaft (3), and the first roller (2) moves to perform compression operation;

when the variable capacity is not changed, the controller controls the air flow to change direction, the thrust piece (5) is close to the electromagnetic generator (17) along the axial direction, the separation structure (6) is in contact with the concave part (11), the separation structure (6) retracts into the clutch cavity (9), the eccentric shaft sleeve (7) is separated from the driving shaft (3), and the driving shaft (3) idles.

22. A compressor comprising a compressor variable capacity structure as claimed in any one of claims 1 to 19 or a control method as claimed in claims 20 and 21.

23. Compressor according to claim 22, characterized in that it further comprises a second cylinder (21), a second roller (22), said second roller (22) being mounted on said driving shaft (3), said second roller (22) moving inside said second cylinder (21) for the compression work.

24. An air conditioner characterized by comprising the compressor variable capacity structure of any one of claims 1 to 19 or the control method of claims 20 and 21.

Technical Field

The invention belongs to the technical field of compressors, and particularly relates to a variable volume structure of a compressor, a control method, the compressor and an air conditioner.

Background

The variable capacity compressor operates in double cylinders when large cooling capacity is needed, and operates in single cylinder when small cooling capacity is needed. However, the control modes of the variable capacity are different, some adopt a one-way valve to control whether the air suction of one air cylinder is used for controlling whether the air cylinder works, and some adopt a mode of a pin clamping a sliding sheet to control the following performance of the sliding sheet so as to achieve the purpose of variable capacity. However, both of these approaches require significant changes from the system piping and control logic, resulting in increased overall costs.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is that the control structure of the variable-capacity compressor in the prior art is complex, so that the variable-capacity structure of the compressor, the control method, the compressor and the air conditioner are provided.

In order to solve the above problems, the present invention provides a variable capacity structure of a compressor, including:

the first roller is installed in the first cylinder;

the driving shaft is provided with a coupling device, the coupling device has two working states, in the first state, the coupling device connects a first roller with the driving shaft, the first roller eccentrically rotates under the driving of the driving shaft, the first roller performs compression operation in a first cylinder, in the second state, the coupling device separates the first roller from the driving shaft, and the driving shaft idles.

The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.

Preferably, the coupling arrangement includes a thrust member, the thrust member being movable along the drive shaft, and at least one decoupling structure which couples or decouples the first roller to or from the drive shaft in response to movement of the thrust member.

Preferably, the coupling device includes an eccentric sleeve coaxially installed in the first roller, a drive shaft installed in the eccentric drive hole, a thrust member movable along the drive shaft, and at least one separating structure for coupling or decoupling the eccentric sleeve with or from the drive shaft in accordance with movement of the thrust member.

Preferably, a shaft hole is provided in the drive shaft, and the thrust member is mounted in the shaft hole and moves along the shaft hole.

Preferably, the driving shaft is provided with a clutch cavity, the clutch cavity is communicated with the shaft hole and the outer wall of the driving shaft, the inner wall of the eccentric shaft sleeve is correspondingly provided with a connecting groove, the separating structure can move in the clutch cavity along the radial direction, the separating structure moves outwards along the radial direction, the separating structure is matched with the connecting groove, the eccentric shaft sleeve is connected with the driving shaft, the separating structure moves inwards along the radial direction, the separating structure is separated from the connecting groove, and the eccentric shaft sleeve is separated from the driving shaft.

Preferably, the thrust member is provided with a concave portion and a convex portion which are arranged along the axial direction, the separation structure changes the position along the radial direction of the driving shaft along with the axial movement of the thrust member, when the separation structure is contacted with the convex portion, the separation structure is at the radial far end, the coupling device is in the first working state, when the separation structure is released from the concave portion, the separation structure is at the radial near end, and the coupling device is in the second working state.

Preferably, the separating structure is a ball.

Preferably, the thrust piece further comprises hook-shaped pieces, the hook-shaped pieces correspond to the separation structures in a one-to-one mode, the hook-shaped pieces are arranged along the radial direction of the thrust piece, and the hook-shaped pieces are used for hooking the separation structures at the radial far end back to the radial near end when the thrust piece moves axially.

Preferably, the separating structure is a ball, and the hook member comprises a support section and a working section, the tail end of the working section is bent towards the separating structure, and the working section can guide the separating structure to move by means of a bent arc surface.

Preferably, the drive shaft is provided with a slide groove for accommodating the hook member to move in the axial direction.

Preferably, there are two separating structures and two hook elements, the two separating structures are symmetrically arranged along the radial direction, and the two hook elements are symmetrically arranged along the radial direction.

Preferably, the inner diameter of the eccentric shaft sleeve is D3, the outer diameter of the driving shaft is D1, D1 is less than D3, and the driving shaft is in clearance fit with the eccentric shaft sleeve; the radial distance of the valleys is D5, the radial distance of the peaks is D4, the radial distance of the separation structure is Φ, wherein D5+2 Φ < D3, and D4+2 Φ > D3.

Preferably, the distance between the ends of the working sections of the two hook-shaped elements is D2, the outer diameter of the driving shaft is D1, and D2 is not more than D1.

Preferably, the hook is of a sheet metal structure, and the width of the support section decreases outwards along the radial direction of the driving shaft.

Preferably, the compressor positive displacement structure further comprises a control structure for driving the thrust member to move along the shaft hole.

Preferably, the control structure comprises an electromagnetic generator mounted on the compressor shell and an electromagnetic adsorption part mounted at the shaft end of the thrust piece, and the electromagnetic generator and the electromagnetic adsorption part repel or attract each other to control the axial movement of the thrust piece.

Preferably, the electromagnetic adsorption part is a permanent magnet, and the polarity of the permanent magnet is distributed along the axial direction of the thrust piece.

Preferably, the control structure comprises a push cylinder arranged on a shell of the compressor, a push rod of the push cylinder is connected with the thrust piece, the push cylinder is communicated with a high-pressure pipeline of the compressor, the push cylinder is externally connected with a controller, and the controller controls the direction of air flow to realize pushing or pulling back of the push rod.

Preferably, the compressor variable-capacity structure further comprises a sensor, and the sensor can detect the output cold quantity of the system and determine whether to perform variable capacity.

The control method of the variable volume structure of the compressor comprises the following steps: when the capacity is changed, current is introduced into the electromagnetic generator, the electromagnetic generator and the electromagnetic adsorption part repel each other, the thrust piece is far away from the electromagnetic generator along the axial direction, the separation structure is in contact with the convex part, the separation structure extends out of the clutch cavity, the tail end of the separation structure is matched with the connecting groove, the eccentric shaft sleeve is connected with the driving shaft, and the first roller moves to perform compression operation;

when the capacity is not changed, the electromagnetic generator is introduced with reverse current to enable the electromagnetic generator and the electromagnetic adsorption part to attract each other, the thrust piece is close to the electromagnetic generator along the axial direction, the separation structure is contacted with the concave part and retracts into the clutch cavity, the eccentric shaft sleeve is separated from the driving shaft, and the driving shaft idles.

The control method of the variable volume structure of the compressor comprises the following steps: when the capacity is changed, the controller controls the flow direction of air flow, so that the push rod drives the thrust piece to be far away from the electromagnetic generator along the axial direction, the separation structure is contacted with the convex part, the separation structure extends out of the clutch cavity, the tail end of the separation structure is matched with the connecting groove, the eccentric shaft sleeve is connected with the driving shaft, and the first roller moves to perform compression operation;

when the variable capacity is not changed, the controller controls the air flow to change direction, so that the thrust piece is close to the electromagnetic generator along the axial direction, the separation structure is contacted with the concave part, the separation structure retracts into the clutch cavity, the eccentric shaft sleeve is separated from the driving shaft, and the driving shaft idles.

A compressor comprises the compressor variable-capacity structure or the control method.

Preferably, the compressor further comprises a second cylinder, a second roller mounted on the driving shaft, the second roller moving in the second cylinder for compression work.

An air conditioner comprises the compressor variable-capacity structure or the control method.

The compressor variable volume structure, the control method, the compressor and the air conditioner provided by the invention at least have the following beneficial effects:

compared with the prior art, the variable-capacitance structure of the compressor has the advantages of simple variable-capacitance logic and simple control mode, can effectively reduce the cost, directly stops the operation of the cylinder, reduces the energy loss, saves the ineffective abrasion of the roller and the cylinder, and is safe and efficient in variable-capacitance mode.

Drawings

Fig. 1 is a schematic structural diagram of a variable capacitance structure of a compressor according to an embodiment of the present invention;

FIG. 2 is a view illustrating a state where an eccentric sleeve is coupled to a driving shaft according to an embodiment of the present invention;

FIG. 3 is a view illustrating a state where the eccentric sleeve is separated from the driving shaft according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a thrust member according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a control structure according to a first embodiment of the present invention;

fig. 6 is a schematic control structure diagram according to a second embodiment of the present invention.

The reference numerals are represented as:

1. a first cylinder; 2. a first roller; 3. a drive shaft; 4. a coupling device; 5. a thrust member; 6. a separation structure; 7. an eccentric shaft sleeve; 8. a shaft hole; 9. a clutch cavity; 10. a coupling groove; 11. a recess; 12. a convex portion; 13. a hook member; 14. a support section; 15. a working section; 16. a chute; 17. an electromagnetic generator; 18. an electromagnetic adsorption part; 19. pushing the cylinder; 20. a push rod; 21. a second cylinder; 22. a second roller.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 4, a variable capacity structure of a compressor according to an embodiment of the present invention includes: the device comprises a first cylinder 1, wherein a first roller 2 is arranged in the first cylinder 1; the driving shaft 3 is provided with a coupling device 4 on the driving shaft 3, the coupling device 4 has two working states, in the first state, the coupling device 4 couples the first roller 2 with the driving shaft 3, the first roller 2 eccentrically rotates under the driving of the driving shaft 3, the first roller 2 performs compression operation in the first cylinder 1, in the second state, the coupling device 4 separates the first roller 2 from the driving shaft 3, and the driving shaft 3 idles.

Compared with the prior art, the variable volume structure of the compressor provided by the embodiment of the invention has the advantages that the variable volume logic is simple, the control mode is simple, the cost can be effectively reduced, the cylinder can be directly stopped, the energy loss is reduced, the ineffective abrasion of the roller and the cylinder is saved, and the variable volume mode is safe and efficient.

In this embodiment, the coupling device 4 includes a thrust member 5, at least one separating structure 6, the thrust member 5 being movable along the drive shaft 3, the at least one separating structure 6 coupling or decoupling the first roller 2 to or from the drive shaft 3 in response to movement of the thrust member 5.

In this embodiment, the coupling device 4 includes an eccentric sleeve 7, a thrust member 5, and at least one separating structure 6, the eccentric sleeve 7 is coaxially installed in the first roller 2, the driving shaft 3 is installed in the eccentric driving hole, the thrust member 5 is movable along the driving shaft 3, and the at least one separating structure 6 couples or decouples the eccentric sleeve 7 with or from the driving shaft 3 in accordance with the movement of the thrust member 5. The eccentric shaft sleeve 7 and the driving shaft 3 of the first cylinder 1 are divided into two bodies, the eccentric shaft sleeve 7 is separated from the driving shaft 3 when the capacity is not changed, and the first roller 2 can be guaranteed to stop.

In this embodiment, a shaft hole 8 is formed in the driving shaft 3, the thrust member 5 is installed in the shaft hole 8, and the thrust member 5 moves along the shaft hole 8. The driving shaft 3 is provided with a clutch cavity 9, the clutch cavity 9 is communicated with the shaft hole 8 and the outer wall of the driving shaft 3, the inner wall of the eccentric shaft sleeve 7 is correspondingly provided with a connecting groove 10, the separating structure 6 can move along the radial direction in the clutch cavity 9, the separating structure 6 moves along the radial direction outwards, the separating structure 6 is matched with the connecting groove 10, the eccentric shaft sleeve 7 is connected with the driving shaft 3, the separating structure 6 moves along the radial direction inwards, the separating structure 6 is separated from the connecting groove 10, and the eccentric shaft sleeve 7 is separated from the driving shaft 3.

In this embodiment, the thrust member 5 is provided with a concave portion 11 and a convex portion 12 which are arranged along the axial direction, the separating structure 6 changes the position along the radial direction of the driving shaft 3 along with the axial movement of the thrust member 5, when the separating structure 6 contacts the convex portion 12, the separating structure 6 is at the distal end in the radial direction, and the coupling device 4 is in the first working state, and when the separating structure 6 is released from the concave portion 11, the separating structure 6 is at the proximal end in the radial direction, and the coupling device 4 is in the second working state.

In the present embodiment, the separation structure 6 is any one of a ball, a slide pin, and a slider. In the present embodiment, balls are preferably used as the separation structure 6.

In this embodiment, the thrust piece 5 further includes hook pieces 13, the hook pieces 13 correspond to the separation structures 6 one by one, the hook pieces 13 are arranged along the radial direction of the thrust piece 5, and the hook pieces 13 are used for hooking the separation structures 6 at the radial far end back to the radial near end when the thrust piece 5 moves axially. The hook element 13 comprises a support section 14 and a working section 15, the end of the working section 15 is bent towards the separating structure 6, and the working section 15 can guide the separating structure 6 to move by means of the bent arc surface.

In this embodiment, a sliding groove 16 for accommodating the hook-shaped member 13 to move along the axial direction is formed in the driving shaft 3, the sliding groove 16 is formed in one surface of the driving shaft 3, which is provided with the clutch cavity 9, the hook-shaped member 13 can be welded to the top end of the thrust member 5, the hook-shaped member 13 moves up and down along with the thrust member 5, and the working section 14 of the hook-shaped member 13 slides up and down in the sliding groove 16.

In this embodiment, there are two separating structures 6 and two hook members 13, and the two separating structures 6 and the two hook members 13 are symmetrically arranged in the radial direction. The number of separating structures 6 can be determined according to the type of compressor, and two separating structures 6 are sufficient when the compressor is small.

In the embodiment, the inner diameter of the eccentric shaft sleeve 7 is D3, the outer diameter of the driving shaft 3 is D1, D1 is smaller than D3, and the driving shaft 3 is in clearance fit with the eccentric shaft sleeve 7; the radial distance of the recess 11 is D5, the radial distance of the protrusion 12 is D4, the radial distance of the separating structure 6 is Φ, wherein D5+2 Φ < D3, and D4+2 Φ > D3, thereby enabling the separating structure 6 to achieve coupling or decoupling of the eccentric bushing 7 with the drive shaft 3. The depth of the coupling slot 10 on the eccentric sleeve 7 is preferably phi/4, so as to ensure that the ball in the free state is not clamped between the driving shaft 3 and the eccentric sleeve 7, and meanwhile, the working section 15 of the hook piece 13 can effectively restrict the movement of the ball in the variable-volume state, thereby ensuring the normal operation of the first cylinder 1.

In the present embodiment, the distance between the ends of the working sections 15 of the two hook members 13 is D2, the outer diameter of the driving shaft 3 is D1, and D1 is not less than D2. It is ensured that the hook member 13 does not interfere with the inside of the eccentric sleeve 7 when sliding up and down.

In this embodiment, the hook 13 is a sheet metal structure, and the width of the support section 14 decreases gradually along the radial direction of the driving shaft 3, so as to increase the structural strength of the hook 13.

The normal operation and the variable capacity state are used for controlling the operation and the stop of the cylinder body, the invention controls the operation and the stop of the first cylinder 1, firstly, the thrust piece 5 is controlled to move back and forth along the axial direction from the initial position and the pushing position, the initial position is the state shown in figure 3, and the pushing position is the state shown in figure 2. When the thrust piece 5 is in the original position, the balls are in a free state, the eccentric sleeve 7 and the driving shaft 3 are separated from each other, the driving shaft 3 keeps in a moving state because the driving shaft 3 is driven by the motor, the eccentric sleeve 7 is driven by the driving shaft 3, all the time, the eccentric sleeve 7 is in a stop state, and therefore the first cylinder 1 is also in a stop moving state, and one cylinder moves and belongs to a variable volume state. When the thrust piece 5 advances forward, the balls are pushed into the connecting groove 10 of the eccentric shaft sleeve 7 by the thrust piece 5 at the moment, the balls are clamped between the eccentric shaft sleeve 7 and the driving shaft 3, the eccentric shaft sleeve 7 and the driving shaft 3 belong to a linkage state at the moment, the first cylinder 1 and the second cylinder 21 run simultaneously, and the compressor belongs to a normal double-cylinder compressor at the moment.

Fig. 1 and 2 show the normal double-cylinder operation of the compressor, when the thrust piece 5 is in the thrust position, the balls enter the connecting slot 10 of the eccentric sleeve 7 to connect the upper eccentric sleeve 7 and the driving shaft 3, and at this time, the upper and lower cylinders start to work simultaneously.

Fig. 3 shows the working state of the compressor in the capacity-variable state, at this time, the thrust piece 5 is at the initial position, the balls are not allowed to enter the connecting groove 10 of the eccentric sleeve 7, the eccentric sleeve 7 does not move, the first roller 2 cannot work, the first cylinder 1 stops working at the same time, and at this time, only the second cylinder 21 runs, so as to achieve the capacity-variable purpose.

In this embodiment, in order to realize the automation and the intellectuality of compressor variable volume, compressor variable volume structure still includes control structure, and control structure is used for driving thrust piece 5 and removes along shaft hole 8.

As shown in fig. 5, in the control structure of the variable capacitance structure of the compressor according to the first embodiment of the present invention, the electromagnet can change the N pole and the S pole at the two ends of the magnet according to the direction of the changed current by using the property of the electromagnet and the physical property of magnetism, the control structure includes an electromagnetic generator 17 mounted on the compressor housing, and further includes an electromagnetic absorption portion 18 mounted at the shaft end of the thrust piece 5, and the electromagnetic generator 17 and the electromagnetic absorption portion 18 repel each other or attract each other to control the axial movement of the thrust piece 5. The electromagnetic adsorption part 18 is a permanent magnet, and the polarity of the permanent magnet is distributed along the axial direction of the thrust piece 5. The compressor varactor structure still includes the sensor, and the sensor detects the content and for compressor rotational speed and indoor temperature, reaches the change current direction in the certain limit and realizes the varactor when rotational speed and temperature, for example the temperature is close to preset temperature, and the rotational speed is low excessively simultaneously, needs to carry out the varactor this moment.

The electromagnetic generator 17 is fixed on the lower cover of the compressor in a welding mode, and in order to ensure the working reliability, the outside of the electromagnetic generator 17 needs to be sealed, and epoxy resin can be used. The tail end of the thrust piece 5 needs to be fixed with a permanent magnet, and attention needs to be paid to the fact that the distance between the permanent magnet and the upper end of the electromagnetic generator 17 is the distance for pulling up the thrust piece 5 when the capacity is changed. Both the power supply and the sensor of the electromagnetic generator 17 can be provided at the outer end of the compressor.

The method for controlling the variable-capacity structure of the compressor in the first embodiment comprises the following steps:

when the capacity is changed, current is introduced into the electromagnetic generator 17, so that the electromagnetic generator 17 and the electromagnetic adsorption part 18 repel each other, the thrust piece 5 is far away from the electromagnetic generator 17 along the axial direction, the separation structure 6 is in contact with the convex part 12, the separation structure 6 extends out of the clutch cavity 9, the tail end of the separation structure 6 is matched with the connecting groove 10, the eccentric shaft sleeve 7 is connected with the driving shaft 3, and the first roller 2 moves to perform compression operation;

when the capacity is not changed, reverse current is introduced into the electromagnetic generator 17, so that the electromagnetic generator 17 and the electromagnetic adsorption part 18 are attracted, the thrust piece 5 is close to the electromagnetic generator 17 along the axial direction, the separation structure 6 is contacted with the concave part 11, the separation structure 6 retracts into the clutch cavity 9, the eccentric shaft sleeve 7 is separated from the driving shaft 3, and the driving shaft 3 idles.

In this embodiment, the sensor detects content for compressor rotational speed and indoor temperature, reaches the change current direction in certain extent when rotational speed and temperature and realizes the varactor, for example the temperature is close to preset temperature, and the rotational speed is low excessively simultaneously, can realize the varactor this moment.

As shown in fig. 6, in the control structure of the variable volume structure of the compressor provided in the second embodiment, the high-pressure gas in the compressor is used for providing power, the control structure includes a push cylinder 19 installed on a shell of the compressor, a push rod 20 of the push cylinder 19 is connected with the thrust piece 5, the push cylinder 19 is communicated with a high-pressure pipeline of the compressor, the push cylinder 19 is externally connected with a controller, and the controller controls an air flow direction to realize pushing or pulling back of the push rod 20.

The push cylinder 19 is fixed at the lower end of the lower cover of the compressor, and in order to ensure the sealing performance of the compressor, the end face of the push cylinder 19 needs to be matched with the lower cover surface and is connected with the lower cover surface in a sealing mode through welding. Because the push cylinder 19 utilizes high-pressure gas inside the compressor, the air inlet of the push cylinder 19 can be led into the upper end of the motor of the compressor through an internally placed pipeline or an externally connected pipeline.

The method for controlling the variable capacity structure of the compressor in the second embodiment comprises the following steps: when the capacity is changed, the controller controls the flow direction of air flow, so that the push rod 20 drives the thrust piece 5 to be far away from the electromagnetic generator 17 along the axial direction, the separation structure 6 is contacted with the convex part 12, the separation structure 6 extends out of the clutch cavity 9, the tail end of the separation structure 6 is matched with the connecting groove 10, the eccentric shaft sleeve 7 is connected with the driving shaft 3, and the first roller 2 moves to perform compression operation;

when the capacity is not changed, the controller controls the air flow to change direction, so that the thrust piece 5 is close to the electromagnetic generator 17 along the axial direction, the separation structure 6 is contacted with the concave part 11, the separation structure 6 retracts into the clutch cavity 9, the eccentric shaft sleeve 7 is separated from the driving shaft 3, and the driving shaft 3 idles.

A compressor comprises the compressor variable-capacity structure or the control method.

In this embodiment, the compressor further includes a second cylinder 21, and a second roller 22, the second roller 22 is mounted on the driving shaft 3, and the second roller 22 moves in the second cylinder 21 to perform the compression operation.

An air conditioner comprises the compressor variable-capacity structure or the control method.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.