CN112211819A

CN112211819A - Rotary compressor and method

Info

Publication number: CN112211819A
Application number: CN201910630511.4A
Authority: CN
Inventors: 潘瑾; 王艳珍; 刘春慧
Original assignee: Shanghai Highly Electrical Appliances Co Ltd
Current assignee: Shanghai Highly Electrical Appliances Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2021-01-12
Anticipated expiration: 2039-07-12
Also published as: CN112211819B

Abstract

The invention discloses a rotary compressor and a method, wherein the rotary compressor comprises: a housing; a first cylinder and a second cylinder; a first blade; a second blade; the invention relates to a compressor, which comprises a shell, a first cylinder, a pressure control chamber, a first air passage, a second air passage, a first air suction passage, a pressure control chamber, a second air passage, a second air suction passage, a low-pressure gas and a high-pressure gas, wherein the first cylinder is provided with the pressure control chamber, the second end of the first blade groove is communicated with the pressure control chamber, the pressure control chamber is connected with a first air suction passage through the first air passage, and only one air passage in the first air passage and the second air passage is in a conducting state at the same time.

Description

Rotary compressor and method

Technical Field

The invention relates to the technology in the field of air conditioner refrigeration, in particular to a rotary compressor and a method.

Background

In the modern society, the frequency of air conditioner use is more and more, and in order to improve quality of life, the air conditioner is also opened in transition seasons (spring, autumn), but indoor outer temperature difference is less after the air conditioner is used in the transition seasons, and the load of the air conditioner is less. In winter, the air conditioner is expected to blow hot air and can operate under an overlarge load. The air conditioner can give consideration to both quick heating in winter and extremely-small load operation in transition seasons, so that the compressor can give consideration to both, namely the capacity (volume flow) of the air conditioner compressor can be changed according to different loads. Fig. 1 is a schematic view of a conventional cylinder structure. The inner cavity of the cylinder 13 shown in fig. 1 is divided into an air suction cavity 137 ' and an air discharge cavity 138 ' by the vane 136 ' and the rotary piston 139 ', the air suction channel 131 ' is opened on the cylinder 13 ', when the crankshaft drives the rotary piston 139 ' to rotate, the refrigerant enters the air suction cavity 137 ' through the air suction channel 131 ' along the air suction direction Ps, and then is discharged from the air discharge cavity 138, and the discharged refrigerant is discharged along the air discharge direction Pd. The compressor having the cylinder shown in fig. 1 cannot realize that the capacity (volume flow rate) of the air conditioner compressor can be varied according to the load.

Disclosure of Invention

The invention aims to provide a rotary compressor and a method thereof, wherein a pressure control chamber is arranged in a cylinder, a blade groove of the cylinder is communicated with the pressure control chamber, the pressure control chamber is respectively communicated with low-pressure gas and high-pressure gas through two different control gas passages, so that the cylinder stops compressing a refrigerant when the low-pressure gas is introduced into the pressure control chamber, and the cylinder normally compresses the refrigerant when the low-pressure gas is introduced into the pressure control chamber, thereby realizing the switching of the capacity of the compressor and meeting the requirements of different loads in different seasons.

According to an aspect of the present invention, there is provided a rotary compressor including:

a housing;

the first cylinder and the second cylinder are arranged in the shell and are separated by a middle plate, the first cylinder is provided with a first air suction channel arranged along the radial direction of the first cylinder, and the second cylinder is provided with a second air suction channel arranged along the radial direction of the second cylinder;

the first blade is arranged in a first blade groove of the first cylinder, and the first end of the first blade groove is communicated with the inner cavity of the first cylinder;

the second blade is arranged in a second blade groove of the second cylinder, and the first end of the second blade groove is communicated with the inner cavity of the second cylinder;

the first cylinder is provided with a pressure control chamber, the second end of the first blade groove is communicated with the pressure control chamber, the pressure control chamber is connected with the first air suction channel through a first control air channel, and the pressure control chamber is connected with the inner space of the shell through a second control air channel;

one of the first control air passage and the second control air passage is communicated with the control chamber, and the other control air passage is closed;

the second end of the second vane slot is communicated with a mounting hole formed in the second air cylinder, a compression spring is arranged in the mounting hole, and the compression spring is abutted to the second vane.

Preferably, a sliding block is arranged in the cylinder wall of the first cylinder, and the sliding block slides between a first position and a second position;

when the sliding block is located at the first position, the sliding block blocks the first control air passage, and the second control air passage is communicated;

when the sliding block is located at the second position, the sliding block blocks the second control air passage, and the first control air passage is conducted.

Preferably, a sliding groove with the first position and the second position is arranged on the side, adjacent to the first air suction channel, of the pressure control chamber, the sliding block is arranged in the sliding groove, the first control air channel and the second control air channel are both communicated with the first side of the sliding groove, and the second side of the sliding groove is communicated with the control chamber.

Preferably, a first end of the first control air passage is communicated with a first side of the chute, and a second end of the first control air passage extends along a direction perpendicular to the first vane and is communicated with the first air suction passage;

the first end of the second control air passage is communicated with the first side of the sliding chute, and the second end of the second control air passage extends along the direction departing from the control chamber and is communicated with the inner space of the shell.

Preferably, the projection of the second control air passage to one end face of the first cylinder intersects with the projection of the first air suction passage to the end face.

Preferably, the diameter of the first control air passage is larger than the diameter of the second control air passage.

Preferably, a driving device for driving the sliding block is arranged in the shell.

Preferably, the sliding block is provided with a connecting air passage, and when the sliding block is located at the first position, the second control air passage is communicated with the control chamber through the connecting air passage;

when the sliding block is located at the second position, the first control air passage is communicated with the control chamber through the connecting air passage.

Preferably, a locking groove is formed in one side of the first vane groove, and when the first control air passage is communicated with the control chamber, the locking groove is communicated with an inner space of the housing to lock the first vane.

Preferably, when the second control air passage is communicated with the control chamber, the stop groove is communicated with the first air suction passage.

Preferably, a pneumatic lock column is arranged on one side of the first blade, and when the first control air passage is communicated with the control chamber, the free end of the pneumatic lock column is abutted against the side surface of the first blade to lock the first blade.

According to one aspect of the present invention, there is provided a refrigeration method for a compressor having a first cylinder and a second cylinder, comprising:

driving a sliding block positioned in the first air cylinder to slide to a first position so as to enable the second control air passage to be communicated with the control chamber and block the first control air passage connected with the control chamber;

the motor drives the first cylinder and the second cylinder to compress refrigerant;

sliding the sliding block to a second position, wherein the first control air passage is communicated with the control chamber and seals a second control air passage connected with the control chamber, so that the first air cylinder stops compressing the refrigerant;

and communicating a stopping groove arranged at one side of the first blade groove of the first cylinder with the inner space of the shell, so that the stopping groove is filled with a high-pressure refrigerant.

The beneficial effects of the above technical scheme are: the rotary compressor and the method of the invention have the advantages that the pressure control chamber is arranged in the air cylinder, the blade groove of the air cylinder is communicated with the pressure control chamber, the pressure control chamber is respectively communicated with low-pressure gas and high-pressure gas through two different control air passages, so that the air cylinder stops compressing the refrigerant when the low-pressure gas is introduced into the pressure control chamber, and the air cylinder normally compresses the refrigerant when the low-pressure gas is introduced into the pressure control chamber, thereby realizing the switching of the capacity of the compressor and meeting the requirements of different loads in different seasons.

Further features and advantages of the invention, as well as the structure and operation of various embodiments of the invention, are described in detail below with reference to the accompanying drawings. It should be noted that the present invention is not limited to the specific embodiments described herein. These examples are given herein for illustrative purposes only.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a schematic view of a prior art cylinder configuration;

fig. 2 is a schematic structural view of a rotary compressor 10;

FIG. 3 is a schematic sectional view of a first cylinder in embodiment 1;

FIG. 4 is a schematic view of the slider of FIG. 3 in a second position;

FIG. 5 is a schematic structural view of a first cylinder in embodiment 2;

FIG. 6 is a schematic view of the slider of FIG. 5 in a second position;

FIG. 7 is a schematic structural view of a first cylinder in embodiment 3;

fig. 8 is a schematic structural view of a first cylinder in embodiment 4.

Fig. 9 is a schematic flow diagram of a compressor refrigeration method.

List of reference numerals:

10 compressor

11 casing

12 upper cylinder cover

13 first cylinder

131 first air suction channel

132 control Chamber

133 first control air passage

134 second control air passage

1351 sliding block

1352 chute

1353 connecting airway

1354 stop groove

136 first blade

137 air suction cavity

138 exhaust chamber

139 first rotary piston

14 second cylinder

15 lower cylinder cover

16 crankshaft

17 middle plate

18 drive device

19 three-way valve

The features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Throughout the drawings, like reference numerals designate corresponding elements. In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

According to an aspect of the present invention, there is provided a rotary compressor.

Example 1

Fig. 2 is a schematic view of a structure of a rotary compressor 10. The compressor 10 shown in fig. 2 includes a housing 11, and two cylinders, i.e., a first cylinder 13 and a second cylinder 14, are disposed in the housing 11, the first suction cylinder is an upper cylinder, and the second cylinder 14 is a lower cylinder, and in some embodiments, the first cylinder 13 may be the lower cylinder and the second cylinder 14 may be the upper cylinder. The first cylinder 13 and the second cylinder 14 are partitioned by an intermediate plate 17. The first cylinder 13 is provided with a first rotary piston 139, and the second cylinder 14 is provided with a second rotary piston. The two ends of the first cylinder 13 are an upper cylinder cover 12 and a middle plate 17, and the two ends of the second cylinder 14 are a middle plate 17 and a lower cylinder cover 15 respectively. A crankshaft 16 is disposed in the housing 11, the crankshaft 16 has a long axis portion, a short axis portion and an eccentric portion, the first rotary piston 139 and the second rotary piston are respectively sleeved on the eccentric portion of the crankshaft 16, the long axis portion of the crankshaft 16 is connected to a motor, and a driving force of the motor is transmitted to the first rotary piston 139 and the second rotary piston to compress a refrigerant. Be equipped with the second blade groove in the second cylinder 14, the first end in second blade groove is linked together with the inner chamber of second cylinder 14, and the second end in second blade groove sets up in the mounting hole intercommunication of second cylinder 14 with one, is equipped with a compression spring in the mounting hole, and compression spring and second blade butt mutually.

Fig. 3 is a schematic sectional view of the first cylinder 13 of embodiment 1. The cylinder wall of the first cylinder 13 shown in fig. 1 is provided with a first vane 136 groove, the first vane 136 groove is arranged along the radial direction of the first cylinder 13, a first end of the first vane 136 groove is communicated with the inner cavity of the first cylinder 13, and a second end of the first vane 136 groove is communicated with a control chamber 132. The first vane 136 is disposed in the groove of the first vane 136, and a first end of the first vane 136 abuts against a first rotary piston 139 disposed in the first cylinder 13. The first vane 136 and the first rotary piston 139 divide an inner cavity of the first cylinder 13 into a suction chamber 137 and a discharge chamber 138. The cylinder wall of the first cylinder 13 is provided with a first air suction channel 131 arranged along the radial direction of the cylinder, the first air suction channel 131 is connected with the inner cavity of the first cylinder 13, and specifically, the first air suction channel 131 is connected with the air suction cavity 137. The pressure control chamber is connected to the first inhalation passage 131 through a first control air passage 133, and the pressure control chamber is connected to the space inside the housing 11 through a second control air passage 134. Only one of the first control air passage 133 and the second control air passage 134 is in a conducting state at the same time.

Referring again to fig. 3, a sliding groove 1352 having a first position and a second position is disposed on a side of the pressure control chamber adjacent to the first inhalation passage 131, the slider 1351 is disposed in the sliding groove 1352, the first control air passage 133 and the second control air passage 134 are both in communication with a first side of the sliding groove 1352, and a second side of the sliding groove 1352 is in communication with the control chamber 132. A sliding block 1351 is arranged in the sliding groove 1352, and the sliding block 1351 slides between a first position and a second position; when the sliding block 1351 is located at the first position, the sliding block 1351 seals the first control air passage 133, and the second control air passage 134 is conducted; when the slider 1351 is located at the second position, the slider 1351 seals the second control air passage 134, and the first control air passage 133 is conducted. A first end of the first control air passage 133 communicates with a first side of the chute 1352, and a second end of the first control air passage 133 extends in a direction perpendicular to the first vane 136 and communicates with the first suction passage 131. A first end of the second control air passage 134 communicates with a first side of the slide groove 1352, and a second end of the second control air passage 134 extends in a direction away from the control chamber 132 and communicates with the inner space of the housing 11. The second control air passage 134 intersects a projection of an end surface of the first cylinder 13 and a projection of the first air suction passage 131 on the end surface. The diameter of the first control air passage 133 may be larger than the diameter of the second control air passage 134. The sliding of the sliding block 1351 between the first position and the second position is performed by a driving device 18 disposed in the intermediate plate 17, and the slide is driven to slide between the first position and the second position by the driving device 18.

Slider 1351 is shown in a first position in fig. 3, where slider 1351 blocks first control port 133 and second control port 134 is in communication with control chamber 132. The crankshaft 16 is driven by the motor to rotate, the second cylinder 14 works normally, and the second cylinder 14 compresses the refrigerant and then discharges the high-pressure refrigerant, so that the housing 11 is filled with high-pressure gas. The high-pressure gas in the housing 11 enters the control chamber 132 through the second control air passage 134, and the first vane 136 and the first rotary piston 139 are abutted under the action of the high-pressure gas, so that the first rotary piston 139 of the first cylinder 13 sucks the low-pressure refrigerant from the first suction passage 131 to the suction chamber 137, and the low-pressure refrigerant is compressed and then discharged from the discharge chamber 138.

Fig. 4 is a schematic diagram of the slider 1351 of fig. 3 in a second position. The slider 1351 is shown in the second position in fig. 4, in which the slider 1351 blocks the second control air passage 134, the first control air passage 133 is communicated with the control chamber 132, and the low-pressure refrigerant in the first suction passage 131 enters the control chamber 132 through the first control air passage 133. The crankshaft 16 is driven by the motor to rotate, the second cylinder 14 works normally, and the second cylinder 14 compresses the refrigerant and then discharges the high-pressure refrigerant. Since the control chamber 132 is filled with the low-pressure refrigerant, the first vane 136 cannot effectively collide with the first rotary piston 139, so that the first cylinder 13 cannot compress the low-pressure refrigerant in the first suction passage 131, and only one cylinder, i.e., the second cylinder 14, compresses the refrigerant, thereby reducing the capacity (volume flow rate) of the compressor 10.

Example 2

Fig. 5 is a schematic structural view of the first cylinder 13 in embodiment 2. Fig. 6 is a schematic view of the slider 1351 of fig. 5 in a second position. Referring to fig. 5 and 6, the present embodiment is different from embodiment 1 in that: a connecting air channel 1353 is arranged in the slider 1351, when the slider 1351 is located at the first position, the second control air channel 134 is communicated with the control chamber 132 through the connecting air channel 1353, and when the slider 1351 is located at the second position, the first control air channel 133 is communicated with the control chamber 132 through the connecting air channel 1353. The first position of the sliding block 1351 is the lower end of the sliding groove 1352, and the second position of the sliding block 1351 is the upper end of the sliding groove 1352.

The slider 1351 is shown in fig. 5 in a first position, in which the slider 1351 blocks the first control air passage 133 and the second control air passage 134 communicates with the control chamber 132 via a connecting air passage 1353 in the slider 1351. The crankshaft 16 is driven by the motor to rotate, the second cylinder 14 works normally, and the second cylinder 14 compresses the refrigerant and then discharges the high-pressure refrigerant, so that the housing 11 is filled with high-pressure gas. The high-pressure gas in the housing 11 enters the control chamber 132 through the second control air passage 134, and the first vane 136 and the first rotary piston 139 are abutted under the action of the high-pressure gas, so that the first rotary piston 139 of the first cylinder 13 sucks the low-pressure refrigerant from the first suction passage 131 to the suction chamber 137, and the low-pressure refrigerant is compressed and then discharged from the discharge chamber 138.

The slider 1351 is shown in fig. 6 in the second position, in which the slider 1351 closes the second control air passage 134, the first control air passage 133 communicates with the control chamber 132 through the connecting air passage 1353 in the slider 1351, and the low-pressure refrigerant in the first suction passage 131 enters the control chamber 132 through the first control air passage 133. The crankshaft 16 is driven by the motor to rotate, the second cylinder 14 works normally, and the second cylinder 14 compresses the refrigerant and then discharges the high-pressure refrigerant. Since the control chamber 132 is filled with the low-pressure refrigerant, the first vane 136 cannot effectively collide with the first rotary piston 139, so that the first cylinder 13 cannot compress the low-pressure refrigerant in the first suction passage 131, and only one cylinder, i.e., the second cylinder 14, compresses the refrigerant, thereby reducing the capacity (volume flow rate) of the compressor 10.

Example 3

Fig. 7 is a schematic structural view of the first cylinder 13 in embodiment 3. Referring to fig. 7, the present embodiment is different from embodiment 2 in that: a stopping groove 1354 is formed at one side of the groove of the first vane 136, and when the slider 1351 is located at the second position, the stopping groove 1354 is communicated with the inner space of the housing 11 to lock the first vane 136. When the slider 1351 is positioned at the first position, the stopping groove 1354 communicates with the first inhalation passage 131. When the sliding block 1351 slides to the second position (the upper end of the sliding chute 1352), the stopping groove 1354 is filled with high-pressure gas, and the high-pressure gas presses the first blade 136, so that the first blade 136 is fixed in the groove of the first blade 136.

In some embodiments, a pneumatic lock cylinder is disposed on one side of the first blade 136, and when the slider 1351 is in the second position, the free end of the pneumatic lock cylinder abuts against the side of the first blade 136 to lock the first blade 136.

Example 4

Fig. 8 is a schematic structural view of the first cylinder 13 in embodiment 4. Referring to fig. 8, the first cylinder 13 in embodiment 4 differs from that in embodiment 1 in that: a three-way valve 19 is included to allow only one of the first and

second control ducts

133, 134 to be in a conducting state at the same time. A first end of the first control air passage 133 is communicated with a first port of the three-way valve 19, and a second end of the first control air passage 133 is communicated with the first inhalation passage 131; a first end of the second control air passage 134 communicates with a second port of the three-way valve 19, and a second end of the second control air passage 134 communicates with the inner space of the housing 11; the control chamber 132 communicates with the third port of the three-way valve 19. The control chamber 132 shown in fig. 8 communicates with a first control air passage 133 and a second control air passage 134 via a three-way valve 19.

According to one aspect of the invention, a compressor refrigeration method is provided.

Fig. 9 is a schematic flow diagram of a compressor refrigeration method. The method shown in fig. 9 includes: step S1, step S2, step S3, and step S4. In step S1, the slider located in the first cylinder is driven to slide to the first position, so that the second control air passage is communicated with the control chamber and the first control air passage connected with the control chamber is blocked. In step S2, the motor drives the first cylinder and the second cylinder to compress the refrigerant. In step S3, the slider is slid to the second position, and the first control air passage is communicated with the control chamber and closes the second control air passage connected to the control chamber, so that the first cylinder stops compressing the refrigerant. In step S4, the stopper groove provided on one side of the first vane groove of the first cylinder is communicated with the internal space of the housing such that the stopper groove is filled with the high-pressure refrigerant.

In summary, according to the rotary compressor and the method of the present invention, the pressure control chamber is disposed in the cylinder, the vane slot of the cylinder is communicated with the pressure control chamber, the pressure control chamber is respectively communicated with the low pressure gas and the high pressure gas through two different control gas passages, so that the cylinder stops compressing the refrigerant when the low pressure gas is introduced into the pressure control chamber, and the cylinder normally compresses the refrigerant when the low pressure gas is introduced into the pressure control chamber, thereby realizing the switching of the capacity of the compressor itself, and meeting the requirements of different loads in different seasons.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A rotary compressor, comprising:

a housing;

2. The rotary compressor of claim 1, wherein a sliding block is disposed in a cylinder wall of the first cylinder, and the sliding block slides between a first position and a second position;

3. The rotary compressor of claim 2, wherein a sliding groove having the first position and the second position is formed at a side of the pressure control chamber adjacent to the first suction passage, the sliding block is disposed in the sliding groove, the first control air passage and the second control air passage are both communicated with a first side of the sliding groove, and a second side of the sliding groove is communicated with the control chamber.

4. The rotary compressor of claim 3, wherein a first end of the first control air passage communicates with a first side of the chute, and a second end of the first control air passage communicates with the first suction passage;

5. The rotary compressor of claim 4, wherein the second control air passage intersects a projection of an end surface of the first cylinder and a projection of the first suction passage on the end surface.

6. The rotary compressor of claim 1, wherein a diameter of the first control air passage is greater than a diameter of the second control air passage.

7. The rotary compressor of claim 2, wherein a driving device for driving the sliding block is provided in the housing.

8. The rotary compressor of claim 1, wherein a sliding block is disposed in a wall of the first cylinder, the sliding block slides between a first position and a second position, the sliding block has a connecting air passage, and when the sliding block is located at the first position, the second control air passage is communicated with the control chamber through the connecting air passage;

9. The rotary compressor of claim 2 or 8, wherein a stopper groove is formed at one side of the first vane groove, and the stopper groove communicates with an inner space of the housing to lock the first vane when the first control gas passage communicates with the control chamber.

10. The rotary compressor of claim 9, wherein the stopper groove communicates with the first suction passage when the second control gas passage communicates with the control chamber.

11. The rotary compressor of claim 2 or 8, wherein a pneumatic lock is disposed on one side of the first vane, and when the first control air passage is communicated with the control chamber, a free end of the pneumatic lock is abutted against a side surface of the first vane to lock the first vane.

12. A method of refrigerating a compressor having a first cylinder and a second cylinder, comprising: