CN218376878U - Rotary compressor and refrigeration cycle device - Google Patents

Abstract

The utility model discloses a rotary compressor and refrigeration cycle device, rotary compressor includes: the compression mechanism comprises a first air cylinder, a middle partition plate and a second air cylinder which are arranged in a stacked mode, the first air cylinder is provided with a first compression cavity, the second air cylinder is provided with a second compression cavity, the middle partition plate is provided with a shunting hole, and the shunting hole is provided with an outflow port communicated with at least one of the first compression cavity and the second compression cavity; and the air suction pipe assembly comprises a first air suction pipe, a second air suction pipe and a third air suction pipe, the air inlet ends of the first air suction pipe, the second air suction pipe and the third air suction pipe are respectively used for connecting a liquid storage device, the air outlet end of the first air suction pipe is communicated with the first compression cavity, the air outlet end of the second air suction pipe is communicated with the second compression cavity, and the air outlet end of the third air suction pipe is communicated with the flow distribution hole. The technical scheme of the utility model can realize the effective promotion of the volumetric efficiency of rotary compressor when high-speed operation.

Description

Rotary compressor and refrigeration cycle device

Technical Field

The utility model relates to a compressor technical field, in particular to rotary compressor and refrigeration cycle device.

Background

The rotary compressor adopts two pairs of pistons to compress oppositely, has the advantages of large displacement, small vibration and the like, and has high performance and reliability even under the condition that the variable frequency motor runs at high speed, so the rotary compressor is widely applied to refrigeration cycle devices (such as air conditioners). In the related art, the increase rate of the volumetric efficiency of the rotary compressor is reduced in proportion to the rotation speed of the motor, and the volumetric efficiency cannot be effectively improved under the condition that the motor rotates at a high speed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rotary compressor aims at realizing the effective promotion of the volume efficiency of rotary compressor when high-speed operation.

To achieve the above object, the present invention provides a rotary compressor, including:

the compression mechanism comprises a first air cylinder, a middle partition plate and a second air cylinder which are sequentially stacked, wherein the first air cylinder is provided with a first compression cavity, the second air cylinder is provided with a second compression cavity, the middle partition plate is provided with a shunting hole, and the shunting hole is provided with an outflow port communicated with at least one of the first compression cavity and the second compression cavity; and

the air suction pipe assembly comprises a first air suction pipe, a second air suction pipe and a third air suction pipe, the air inlet ends of the first air suction pipe, the second air suction pipe and the third air suction pipe are respectively used for being connected with a liquid storage device, the air outlet end of the first air suction pipe is communicated with the first compression cavity, the air outlet end of the second air suction pipe is communicated with the second compression cavity, and the air outlet end of the third air suction pipe is communicated with the flow distribution hole.

In one embodiment, the diversion hole comprises a first diversion channel communicated with the first compression cavity and a second diversion channel communicated with the second compression cavity, the first diversion channel and the second diversion channel are arranged at an included angle, and the intersection of the first diversion channel and the second diversion channel is communicated with the exhaust end of the third suction pipe.

In one embodiment, the first cylinder is provided with a first jack communicated with the first air suction pipe, and the first jack is communicated with the first compression cavity;

and/or the second cylinder is provided with a second jack communicated with the second air suction pipe, and the second jack is communicated with the second compression cavity;

and/or the middle partition plate is provided with a third jack communicated with the third air suction pipe, and the third jack is communicated with the diversion hole.

In one embodiment, the compression mechanism further comprises:

the main bearing is connected to one side, away from the middle partition plate, of the first cylinder, and is provided with a main exhaust hole communicated with the first compression cavity;

the auxiliary bearing is connected to one side, away from the middle partition plate, of the second cylinder and is provided with an auxiliary exhaust hole communicated with the second compression cavity;

the compression mechanism is further provided with an exhaust channel which penetrates through the main bearing, the first air cylinder, the middle partition plate, the second air cylinder and the auxiliary bearing, the air inlet end of the exhaust channel is communicated with the air outlet end of the auxiliary exhaust hole, and the air outlet end of the exhaust channel and the air outlet end of the main exhaust hole both penetrate through one side of the main bearing, which deviates from the first air cylinder.

In one embodiment, the middle partition plate is further provided with a buffer cavity, a first exhaust hole and a second exhaust hole, the first exhaust hole is respectively communicated with the first compression cavity and the buffer cavity, the second exhaust hole is respectively communicated with the second compression cavity and the buffer cavity, and the buffer cavity is communicated with the exhaust channel.

In one embodiment, a first exhaust valve which is opened in one direction towards one side of the buffer cavity is arranged at the first exhaust hole;

and/or a second exhaust valve which is opened towards one side of the buffer cavity in a one-way mode is arranged at the second exhaust hole.

In one embodiment, the middle partition plate comprises a first partition plate and a second partition plate which are arranged in a stacked mode, the first partition plate is provided with a first cavity which is opened towards one side of the second partition plate, the second partition plate is provided with a second cavity which is opened towards one side of the first partition plate, the first cavity and the second cavity are combined to form the buffer cavity, the first partition plate is provided with the first exhaust hole, and the second partition plate is provided with the second exhaust hole.

In one embodiment, the middle partition plate is an integrally formed structure, and the buffer cavity is formed on the outer side surface of the middle partition plate through an end milling cutter machining process.

In one embodiment, a first silencer is arranged on one side of the main bearing, which faces away from the first cylinder, the first silencer is provided with a first silencing cavity and a silencing cavity exhaust hole communicated with the first silencing cavity, and an exhaust end of the main exhaust hole and an exhaust end of the exhaust channel are both communicated with the first silencing cavity;

and/or one side of the auxiliary bearing, which deviates from the second cylinder, is provided with a second silencer, the second silencer is provided with a second silencing cavity, and the exhaust end of the auxiliary exhaust hole and the air inlet end of the exhaust channel are communicated with the second silencing cavity.

The utility model discloses still provide a refrigeration cycle device, include as above rotary compressor.

The utility model discloses a rotary compressor is through the first compression chamber intercommunication with first breathing pipe and first cylinder, the second compression chamber intercommunication of second breathing pipe and second cylinder to be equipped with the reposition of redundant personnel hole at the median septum, with third breathing pipe and reposition of redundant personnel hole intercommunication, thereby can be respectively to first compression chamber, second compression chamber and reposition of redundant personnel hole transport low pressure refrigerant. And the flow dividing hole is provided with an outflow port communicated with at least one of the first compression cavity and the second compression cavity, so that the refrigerant in the flow dividing hole can be converged with the refrigerant in the first compression cavity and/or the second compression cavity, the amount of the refrigerant in the first compression cavity and/or the second compression cavity is increased, the volumetric efficiency of the double-cylinder rotary compressor can be effectively improved, the increase rate of the volumetric efficiency of the rotary compressor is increased in proportion to the rotating speed of the motor, and the effective improvement of the volumetric efficiency of the rotary compressor in high-speed operation can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view illustrating an embodiment of a rotary compressor according to the present invention;

fig. 2 is a schematic X-sectional view of the rotary compressor of fig. 1;

FIG. 3 is a schematic diagram of a comparison of volumetric efficiency of the rotary compressor of FIG. 1 and a rotary compressor of a prior art design;

fig. 4 is a schematic structural view of another embodiment of the rotary compressor of the present invention.

The reference numbers indicate:

100、101	rotary compressor	13D	Sliding vane
					2	Shell body	14	Middle partition board
3	Exhaust pipe	14A	Flow dividing hole
				4	Electric machine	14R	Buffer cavity
4a	Stator	14a	A first exhaust hole
				4b	Rotor
	14b	Second vent hole
			5A、5B	Compression mechanism		15	The second cylinder
8	Lubricating oil	15A						Second compression chamber
			10	Crankshaft	15a	Second jack
10A	Main shaft	15B					Second piston
			10B	First eccentric shaft	16	Secondary bearing
10C	Intermediate shaft	16a					Auxiliary exhaust hole
			10D	Second eccentric shaft	16M	Second muffler
10E	Auxiliary shaft	17					Exhaust passage
			12	Main bearing	6A	First air suction pipe
12a	Main exhaust hole	6B					Third air suction pipe
			12M	First muffler	6C	Second air suction pipe
13	First cylinder	30					Condenser
			13A	First compression chamber	31	Expansion device
13a	First jack	32					Evaporator with a heat exchanger
			13B	First piston	33	Liquid storage device

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if the present invention relates to a directional indication (such as up, down, left, right, front, back, 8230 \8230;, 8230;), the directional indication is only used to explain the relative position relationship between the components in a specific posture, the motion situation, etc., and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if the expression "and/or" and/or "is used throughout, the meaning includes three parallel schemes, for example," A and/or B ", including scheme A, or scheme B, or a scheme satisfying both schemes A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a rotary compressor 100.

Referring to fig. 1 and 2, in an embodiment of the present invention, the rotary compressor 100 includes a compressing mechanism 5A and a suction pipe assembly. The compression mechanism 5A comprises a first air cylinder 13, a middle partition plate 14 and a second air cylinder 15 which are sequentially stacked, wherein the first air cylinder 13 is provided with a first compression cavity 13A, a first piston 13B capable of eccentrically rotating is arranged in the first compression cavity 13A, the second air cylinder 15 is provided with a second compression cavity 15A, a second piston 15B capable of eccentrically rotating is arranged in the second compression cavity 15A, the middle partition plate 14 is provided with a diversion hole 14A, and the diversion hole 14A is provided with an outflow port communicated with at least one of the first compression cavity 13A and the second compression cavity 15A; the air suction pipe assembly comprises a first air suction pipe 6A, a second air suction pipe 6C and a third air suction pipe 6B, air inlet ends of the first air suction pipe 6A, the second air suction pipe 6C and the third air suction pipe 6B are respectively used for being connected with a liquid storage device 33, an air outlet end of the first air suction pipe 6A is communicated with the first compression cavity 13A, an air outlet end of the second air suction pipe 6C is communicated with the second compression cavity 15A, and an air outlet end of the third air suction pipe 6B is communicated with the diversion hole 14A.

Specifically, as shown in fig. 1, the rotary compressor 100 includes a casing 2, a motor 4, a compression mechanism 5A, a crankshaft 10, and a suction pipe assembly. Wherein, the motor 4 may specifically adopt a variable frequency motor. Casing 2 can be vertical or horizontal according to the design of in-service use demand to vertical casing is the example, and casing 2 is upright to be placed, and casing 2 is inside to be formed with the inclosed holding chamber of vertical extension, and motor 4 and compressing mechanism 5A all set up in casing 2's holding intracavity, and motor 4 is located compressing mechanism 5A's top, and casing 2 top corresponds the top of motor 4 and still is equipped with blast pipe 3. The bottom of the casing 2 also stores lubricating oil 8 so that the sliding parts of the compression mechanism 5A can be lubricated. The motor 4 specifically includes a rotor 4B and a stator 4a sleeved on the periphery of the rotor 4B, a crankshaft 10 penetrates through the center of the rotor 4B, the other end of the crankshaft 10 extends downward to connect with the compressing mechanism 5A, the crankshaft 10 is driven to rotate by the motor 4, then an eccentric shaft of the crankshaft 10 drives a first piston 13B and a second piston 15B to perform eccentric rotation movement in a first compression cavity 13A and a second compression cavity 15A respectively, and the first cylinder 13 and the second cylinder 15 are further provided with elastically telescopic sliding blades 13D respectively. Taking the first cylinder 13 as an example, one end of the sliding vane 13D extends into the first compression cavity 13A and abuts against the first piston 13B, the first compression cavity 13A can be divided into a low-pressure side and a high-pressure side by the sliding vane 13D, and along with the eccentric rotation motion of the first piston 13B, a low-pressure refrigerant can be sucked into the low-pressure side of the first compression cavity 13A, compressed into a high-pressure refrigerant, and then flows into the high-pressure side and is discharged, thereby compressing the refrigerant.

In the present embodiment, the compression mechanism 5A includes a first cylinder 13, a middle partition 14, and a second cylinder 15, which are stacked in this order in the axial direction of the crankshaft 10, and each of the first cylinder 13, the second cylinder 15, and the middle partition 14 may be provided in a disk shape. The crankshaft 10 may specifically include a first eccentric shaft 10B, an intermediate shaft 10C, and a second eccentric shaft 10D connected in sequence, a first piston 13B is connected to the first eccentric shaft 10B, a second piston 15B is connected to the second eccentric shaft 10D, and a middle partition 14 is provided with a through hole for the intermediate shaft 10C to movably penetrate through. The first cylinder 13 is provided with a first compression chamber 13A, the second cylinder 15 is provided with a second compression chamber 15A, the intermediate partition 14 is provided with a branch hole 14A, and the branch hole 14A has an outflow port communicating with at least one of the first compression chamber 13A and the second compression chamber 15A. For example, in the present embodiment, the branch flow hole 14A has two flow outlets, one of which communicates with the low pressure side of the first compression chamber 13A and the other of which communicates with the low pressure side of the second compression chamber 15A. Of course, in some embodiments, the branch 14A may also have only a single outlet port, which communicates with the low pressure side of the first compression chamber 13A or which communicates with the low pressure side of the second compression chamber 15A. The suction pipe assembly comprises a first suction pipe 6A, a second suction pipe 6C and a third suction pipe 6B, and when in use, the suction pipe assembly of the rotary compressor 100 is supplied with low pressure refrigerant, typically by an external accumulator 33.

The operation of the rotary compressor 100 will be described with reference to fig. 1 to 2, and in this embodiment, the branch hole 14A has two outflow ports respectively communicating with the first compression chamber 13A and the second compression chamber 15A. When the rotary compressor 100 is applied to a refrigerant cycle device (e.g., an air conditioner), the air inlet ends of the first, second, and third suction pipes 6A, 6C, and 6B are respectively communicated with the accumulator 33, and the accumulator 33 is used to store a low-pressure refrigerant. In operation of the rotary compressor 100, the first piston 13B and the second piston 15B eccentrically rotate in the first compression chamber 13A and the second compression chamber 15A, respectively, and the first piston 13B and the second piston 15B relatively rotate at a phase angle of 180 °. The low-pressure refrigerant in the accumulator 33 may be delivered to the first compression chamber 13A, the second compression chamber 15A, and the branch hole 14A through the first suction pipe 6A, the second suction pipe 6C, and the third suction pipe 6B, respectively. The low-pressure refrigerant flowing into the branch hole 14A may flow into the first compression chamber 13A through one of the outlet ports, and join the low-pressure refrigerant sent from the first suction pipe 6A to the first compression chamber 13A, thereby increasing the amount of the refrigerant sucked into the first compression chamber 13A. The low-pressure refrigerant flowing into the branch hole 14A may flow into the second compression chamber 15A through the other outlet port, and join the low-pressure refrigerant sent to the second compression chamber 15A by the second suction pipe 6C, thereby increasing the amount of refrigerant in the second compression chamber 15A.

As shown in fig. 3, the volumetric efficiency of the rotary compressor 100 of the present design is compared with that of the prior art. In fig. 3, the horizontal axis represents the rotation speed (rps) of the inverter motor 4, and the vertical axis represents the volumetric efficiency (%) of the rotary compressor 100. Curve a (dashed line) shows a graph of a relationship between volumetric efficiency and motor rotation speed of the rotary compressor in the conventional design in which the first and second intake pipes 6A and 6C are provided in the first and second cylinders 13 and 15, respectively, but the intermediate partition plate 14 does not include the branch hole 14A and the third intake pipe 6B. Curve B (solid line) represents a graph of the volumetric efficiency versus the motor rotation speed of the rotary compressor 100 according to the present design, and differs from the conventional design in that the branch hole 14A and the third intake pipe 6B are added to the intermediate partition plate 14.

As can be seen by comparing the curve a and the curve B in fig. 3, there is no difference in the volumetric efficiency when the motor is rotated at a low speed of 20rps, but the difference is about 2% when the difference in the volumetric efficiency increases to 60rps in proportion to the rotation speed, and the volumetric efficiency of the present design is excellent. Further, when the rotation speed is increased to 70 to 90rps, the difference in volumetric efficiency is enlarged to about 3 to 5%. The difference increases to 8% when the rotational speed exceeds 100rps, and at 120rps the difference is about 14%. As can be seen, the increase rate of the volumetric efficiency of the rotary compressor in the conventional design is decreased in proportion to the rotational speed of the motor, while the increase rate of the volumetric efficiency of the rotary compressor 100 in the present design is increased in proportion to the rotational speed of the motor by the difference between the amount (cc)/rotational speed (rps) of the refrigerant sucked into the first compression chamber 13A and the second compression chamber 15A, which is the effect achieved by adding the branch hole 14A and the third suction pipe 6B to the intermediate partition plate in the rotary compressor 100 in the present design. In this way, the rotational speed of the electric motor 4 can be freely adjusted over a wide range (for example 10 to 120 rps).

The utility model discloses a rotary compressor 100 is through the first compression chamber 13A intercommunication with first breathing pipe 6A and first cylinder 13, second breathing pipe 6C and the second compression chamber 15A intercommunication of second cylinder 15 to be equipped with reposition of redundant personnel hole 14A at median septum 14, with third breathing pipe 6B and reposition of redundant personnel hole 14A intercommunication, thereby can carry the low pressure refrigerant to first compression chamber 13A, second compression chamber 15A and reposition of redundant personnel hole 14A respectively. In addition, the branch hole 14A has an outflow port communicated with at least one of the first compression chamber 13A and the second compression chamber 15A, so that the refrigerant in the branch hole 14A can be merged with the refrigerant in the first compression chamber 13A and/or the second compression chamber 15A, thereby increasing the amount of the refrigerant in the first compression chamber 13A and/or the second compression chamber 15A, and further effectively improving the volumetric efficiency of the rotary compressor 100, and the increase rate of the volumetric efficiency of the rotary compressor 100 is increased in proportion to the rotation speed of the motor 4, so that the volumetric efficiency of the rotary compressor 100 can be effectively improved when the rotary compressor is operated at a high speed.

As shown in fig. 1, in an embodiment, the diversion hole 14A includes a first diversion channel communicating with the first compression chamber 13A, and a second diversion channel communicating with the second compression chamber 15A, the first diversion channel and the second diversion channel are arranged at an included angle, and a junction of the first diversion channel and the second diversion channel communicates with a discharge end of the third suction pipe 6B.

In this embodiment, the first branch flow channel and the second branch flow channel are arranged at an included angle, and the specific angle of the included angle can be set according to actual needs, so that the branch flow hole 14A generally presents a "V" shaped structure. One end of the first branch flow passage and one end of the second branch flow passage are crossed to form an air inlet communicated with the third air suction pipe 6B, the other end of the first branch flow passage forms a first flow outlet communicated with the low pressure side of the first compression cavity 13A, and the other end of the second branch flow passage forms a second flow outlet communicated with the low pressure side of the second compression cavity 15A. After the low-pressure refrigerant in the accumulator 33 is conveyed to the diversion hole 14A through the third suction pipe 6B, the low-pressure refrigerant can be conveyed to the first compression cavity 13A and the second compression cavity 15A through the first outflow port and the second outflow port, respectively, so that the refrigerant amount in the first compression cavity 13A and the second compression cavity 15A can be effectively increased, and the volumetric efficiency of the rotary compressor 100 in high-speed operation can be further improved.

To facilitate the installation of the first suction pipe 6A, as shown in fig. 1, in one embodiment, the first cylinder 13 is provided with a first insertion hole 13A communicating with the first suction pipe 6A, and the first insertion hole 13A communicates with the first compression chamber 13A. Specifically, the air discharge end of the first air suction pipe 6A may be inserted into the first insertion hole 13a to be connected with the first cylinder 13, and the air intake end of the first air suction pipe 6A may be inserted out of the housing 2 to be connected with the liquid reservoir 33.

In order to facilitate the installation of the second suction pipe 6C, in one embodiment, the second cylinder 15 is provided with a second insertion hole 15A communicating with the second suction pipe 6C, and the second insertion hole 15A communicates with the second compression chamber 15A. Specifically, the discharge end of the second suction pipe 6C may be inserted into the second insertion hole 15a to be connected to the second cylinder 15, and the intake end of the second suction pipe 6C may be extended out of the housing 2 to be connected to the reservoir 33.

In order to facilitate the installation of the third suction pipe 6B, in one embodiment, the middle partition 14 is provided with a third insertion hole inserted into the third suction pipe 6B, and the third insertion hole is communicated with the branch hole 14A. Specifically, the exhaust end of the third suction pipe 6B may be inserted into the third insertion hole to be connected with the middle partition 14, and the intake end of the third suction pipe 6B may be inserted out of the casing 2 to be connected with the reservoir 33.

In one embodiment, the compression mechanism 5A further comprises a main bearing 12 and a secondary bearing 16, the main bearing 12 is connected to a side of the first cylinder 13 facing away from the middle partition 14, and the main bearing 12 is provided with a main exhaust hole 12a communicating with the first compression chamber 13A; the auxiliary bearing 16 is connected to one side of the second cylinder 15, which is far away from the middle partition plate 14, and the auxiliary bearing 16 is provided with an auxiliary exhaust hole 16a communicated with the second compression cavity 15A; the compression mechanism 5A is further provided with an exhaust passage 17 penetrating through the main bearing 12, the first cylinder 13, the middle partition plate 14, the second cylinder 15 and the auxiliary bearing 16, an air inlet end of the exhaust passage 17 is communicated with an air outlet end of the auxiliary exhaust hole 16a, and the air outlet end of the exhaust passage 17 and the air outlet end of the main exhaust hole 12a both penetrate through one side of the main bearing 12 departing from the first cylinder 13.

In the present embodiment, the crankshaft 10 further includes a main shaft 10A and a secondary shaft 10E, the main shaft 10A, the first eccentric shaft 10B, the intermediate shaft 10C, the second eccentric shaft 10D, and the secondary shaft 10E are sequentially connected in the axial direction of the crankshaft 10, and one end of the main shaft 10A away from the first eccentric shaft 10B is connected to the rotor 4B of the motor 4. The main bearing 12 is sleeved on the periphery of the main shaft 10A, and the auxiliary bearing 16 is sleeved on the periphery of the auxiliary shaft 10E. When the rotary compressor 100 operates, a high-pressure refrigerant compressed in the first compression cavity 13A may be discharged through the main discharge hole 12a of the main bearing 12 toward a side away from the first cylinder 13; the high-pressure refrigerant compressed in the second compression cavity 15A may enter the exhaust passage 17 after being discharged through the auxiliary exhaust hole 16a of the auxiliary bearing 16, and then be discharged toward the side away from the first cylinder 13 through the exhaust end of the exhaust passage 17, so as to merge with the high-pressure refrigerant discharged from the main exhaust hole 12a, and further may continue to flow upward through the motor 4, and then be discharged from the exhaust pipe 3 located above the motor 4. In this way, the high-pressure refrigerants discharged from the first cylinder 13 and the second cylinder 15 can finally merge and be discharged through the same discharge pipe 3.

As shown in fig. 4, a rotary compressor 101 according to another embodiment is provided, where the rotary compressor 101 has the same main structure as the rotary compressor 100 according to the previous embodiment, and also includes a housing 2, a motor 4 disposed in the housing 2, a crankshaft 10, and a compression mechanism 5B, and the main difference is that an intermediate partition plate 14 of the compression mechanism 5B according to this embodiment is further improved on the basis of the intermediate partition plate 14 of the compression mechanism 5A, and other structures can refer to the description of the previous embodiment, and are not repeated herein. In this embodiment, the middle partition plate 14 is further provided with a buffer cavity 14R, a first exhaust hole 14a and a second exhaust hole 14b, an air inlet end and an air outlet end of the first exhaust hole 14a are respectively communicated with the first compression cavity 13A and the buffer cavity 14R, an air inlet end and an air outlet end of the second exhaust hole 14b are respectively communicated with the second compression cavity 15A and the buffer cavity 14R, and the buffer cavity 14R is communicated with the exhaust passage 17.

In the present embodiment, by providing the first discharge hole 14a, the second discharge hole 14b, and the buffer chamber 14R in the intermediate partition plate 14, a part of the high-pressure refrigerant in the first compression chamber 13A is discharged from the main discharge hole 12a, and another part of the high-pressure refrigerant may enter the buffer chamber 14R through the first discharge hole 14a, and then enter the discharge passage 17 through the buffer chamber 14R and be discharged, so that the first cylinder 13 has two discharge holes, and the discharge amount of the first cylinder 13 can be increased; and the main exhaust hole 12a and the first exhaust hole 14a are respectively located at the upper and lower sides of the first cylinder 13, so that the high-pressure refrigerant in the first compression cavity 13A can be discharged through the exhaust holes at the upper and lower sides, respectively, and the air pressure distribution in the first compression cavity 13A is more balanced. Similarly, a part of the high-pressure refrigerant in the second compression cavity 15A is discharged from the auxiliary exhaust hole 16a, and the other part of the high-pressure refrigerant enters the buffer cavity 14R through the second exhaust hole 14b and then enters the exhaust channel 17 through the buffer cavity 14R to be discharged, so that the second cylinder 15 is provided with two exhaust holes, and the exhaust amount of the second cylinder 15 can be increased; and the auxiliary exhaust hole 16a and the second exhaust hole 14b are respectively located at the upper and lower sides of the second cylinder 15, so that the high-pressure refrigerant in the second compression cavity 15A can be discharged through the exhaust holes at the upper and lower sides, respectively, and the air pressure distribution in the first compression cavity 13A is more balanced. In addition, compared with the first exhaust hole 14a and the second exhaust hole 14b, the volume of the buffer chamber 14R is larger, and the buffer chamber can perform a good buffer function on the discharged high-pressure refrigerant.

To prevent the discharged high-pressure refrigerant from flowing back into the first compression chamber 13A and/or the second compression chamber 15A. As shown in fig. 4, in one embodiment, a first exhaust valve which opens in one direction towards the buffer chamber 14R is provided at the first exhaust hole 14 a; and/or a second exhaust valve which is opened towards one side of the buffer cavity 14R in a one-way mode is arranged at the second exhaust hole 14b. For example, in the present embodiment, the first exhaust valve is disposed at the first exhaust hole 14a, and the high-pressure refrigerant in the first compression chamber 13A can blow the first exhaust valve open to exhaust the high-pressure refrigerant to the buffer chamber 14R. When the high-pressure refrigerant in the buffer chamber 14R flows back, the first discharge valve is closed, and thus the high-pressure refrigerant is prevented from flowing back into the first compression chamber 13A. A second exhaust valve is arranged at the second exhaust hole 14b, and the high-pressure refrigerant in the second compression cavity 15A can open the second exhaust valve, so as to exhaust the gas to the buffer cavity 14R. When the high-pressure refrigerant in the buffer chamber 14R flows back, the second discharge valve is in a closed state, so that the high-pressure refrigerant is prevented from flowing back into the second compression chamber 15A.

In addition, in order to avoid the high-pressure refrigerant from flowing back into the first compression chamber 13A from the main exhaust hole 12a, optionally, a main exhaust valve which is opened in one direction towards the side departing from the first compression chamber 13A is arranged at the main exhaust hole 12 a. In order to avoid the high-pressure refrigerant from flowing back to the second compression cavity 15A from the auxiliary exhaust hole 16a, optionally, an auxiliary exhaust valve opened in a one-way direction toward the side departing from the second compression cavity 15A is disposed at the auxiliary exhaust hole 16 a.

In the above embodiment, since the buffer cavity 14R needs to be opened inside the middle partition 14, in order to facilitate the production and manufacture, as shown in fig. 4, in one embodiment, the middle partition 14 includes a first partition and a second partition which are stacked, the first partition is provided with a first cavity which is opened toward one side of the second partition, the second partition is provided with a second cavity which is opened toward one side of the first partition, the first cavity and the second cavity are spliced to form the buffer cavity 14R, the first partition is provided with the first vent hole 14a, and the second partition is provided with the second vent hole 14b.

In this embodiment, the middle partition plate 14 is formed by splicing a first partition plate and a second partition plate, that is, the middle partition plate 14 is divided into two parts along the horizontal direction, so that during production and manufacture, only a first cavity needs to be processed on one surface of the first partition plate, a first exhaust hole 14a is processed on the other surface of the first partition plate, a second cavity is processed on one surface of the second partition plate, and a second exhaust hole 14b is processed on the other surface of the second partition plate; and then the first partition plate and the second partition plate are overlapped, so that the complete buffer cavity 14R can be obtained by butting the opening side of the first cavity with the opening side of the second cavity, the manufacturing difficulty of directly processing the buffer cavity 14R on the middle partition plate 14 can be reduced, and the production efficiency can be improved.

Of course, in other embodiments, the middle partition 14 may also be an integrally formed structure, and the outer side surface of the middle partition 14 forms the buffer cavity 14R through an end milling process.

Referring to fig. 1 and 4, in some embodiments, a first muffler 12M is disposed on a side of the main bearing 12 away from the first cylinder 13, the first muffler 12M is provided with a first muffling cavity and a muffling cavity exhaust hole communicated with the first muffling cavity, and an exhaust end of the main exhaust hole 12a and an exhaust end of the exhaust channel 17 are both communicated with the first muffling cavity. In this way, the high-pressure refrigerant discharged from the main exhaust hole 12a and the high-pressure refrigerant discharged from the exhaust passage 17 can enter the first muffling chamber, join each other, and then be discharged through the muffling chamber exhaust hole. The provision of the first muffler 12M can achieve the effect of reducing exhaust noise.

Referring to fig. 1 and 4, in some embodiments, a second muffler 16M is disposed on a side of the auxiliary bearing 16 facing away from the second cylinder 15, the second muffler 16M is provided with a second muffling cavity, and both an exhaust end of the auxiliary exhaust hole 16a and an intake end of the exhaust channel 17 are communicated with the second muffling cavity. Thus, the high-pressure refrigerant discharged from the auxiliary exhaust hole 16a can enter the second muffling chamber, then enter the exhaust channel 17 through the second muffling chamber, and finally be discharged from the exhaust channel 17. The provision of the second muffler 16M can achieve the effect of reducing exhaust noise.

As shown in fig. 1 and fig. 4, the present invention further provides a refrigeration cycle apparatus, which includes a condenser 30, an expansion device 31, an evaporator 32, a liquid storage device 33, and a rotary compressor 100 (or a rotary compressor 101), wherein the rotary compressor 100 (or the rotary compressor 101), the condenser 30, the expansion device 31, the evaporator 32, and the liquid storage device 33 are sequentially connected end to form a refrigerant circulation loop. The specific structure of the rotary compressor 100 (or the rotary compressor 101) refers to the above embodiments, and since the refrigeration cycle apparatus adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.

In this embodiment, the refrigeration cycle device may be specifically an air conditioner or other refrigeration equipment. The condenser 30, the expansion device 31, the evaporator 32 and the reservoir 33 are sequentially connected in series, the exhaust pipe 3 of the rotary compressor 100 (or the rotary compressor 101) is communicated with the input end of the condenser 30, and the air inlet ends of the first air suction pipe 6A, the second air suction pipe 6C and the third air suction pipe 6B are respectively communicated with the output end of the reservoir 33, so that a refrigerant circulation loop is formed. Because the volume efficiency of the rotary compressor 100 (or the rotary compressor 101) is effectively improved, the cooling capacity can be effectively improved, the refrigerating capacity of the refrigeration cycle device can be improved, the COP (coefficient of performance)/power consumption can be improved, and the APF (energy efficiency grade) can be improved.

The above only is the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all under the inventive concept of the present invention, the equivalent structure transformation made by the contents of the specification and the drawings is utilized, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (10)

1. A rotary compressor, comprising:

the compression mechanism comprises a first air cylinder, a middle partition plate and a second air cylinder which are sequentially stacked, wherein the first air cylinder is provided with a first compression cavity, the second air cylinder is provided with a second compression cavity, the middle partition plate is provided with a shunting hole, and the shunting hole is provided with an outflow port communicated with at least one of the first compression cavity and the second compression cavity; and

the air suction pipe assembly comprises a first air suction pipe, a second air suction pipe and a third air suction pipe, the air inlet ends of the first air suction pipe, the second air suction pipe and the third air suction pipe are respectively used for being connected with a liquid storage device, the air outlet end of the first air suction pipe is communicated with the first compression cavity, the air outlet end of the second air suction pipe is communicated with the second compression cavity, and the air outlet end of the third air suction pipe is communicated with the flow distribution hole.

2. The rotary compressor of claim 1, wherein the branch hole comprises a first branch flow passage communicating with the first compression chamber and a second branch flow passage communicating with the second compression chamber, the first branch flow passage and the second branch flow passage are disposed at an included angle, and a junction of the first branch flow passage and the second branch flow passage communicates with a discharge end of the third suction pipe.

3. The rotary compressor of claim 1, wherein the first cylinder is provided with a first insertion hole communicating with the first suction pipe, the first insertion hole communicating with the first compression chamber;

and/or the second cylinder is provided with a second jack communicated with the second air suction pipe, and the second jack is communicated with the second compression cavity;

and/or the middle partition plate is provided with a third jack communicated with the third air suction pipe, and the third jack is communicated with the diversion hole.

4. The rotary compressor of any one of claims 1 to 3, wherein the compression mechanism further comprises:

the main bearing is connected to one side, away from the middle partition plate, of the first cylinder and is provided with a main exhaust hole communicated with the first compression cavity;

the auxiliary bearing is connected to one side, away from the middle partition plate, of the second cylinder and is provided with an auxiliary exhaust hole communicated with the second compression cavity;

compressing mechanism still is equipped with and runs through the base bearing, first cylinder the median septum, the second cylinder reaches the exhaust passage of supplementary bearing, the inlet end of exhaust passage with the end intercommunication of giving vent to anger in the auxiliary exhaust hole, the end of giving vent to anger of exhaust passage with the end of giving vent to anger in the main exhaust hole all run through in the base bearing deviates from one side of first cylinder.

5. The rotary compressor of claim 4, wherein the middle separator is further provided with a buffer chamber, a first discharge hole and a second discharge hole, the first discharge hole being in communication with the first compression chamber and the buffer chamber, respectively, the second discharge hole being in communication with the second compression chamber and the buffer chamber, respectively, the buffer chamber being in communication with the discharge passage.

6. The rotary compressor of claim 5, wherein the first exhaust hole is provided with a first exhaust valve opened in one direction toward one side of the buffer chamber;

and/or a second exhaust valve which is opened towards one side of the buffer cavity in a one-way is arranged at the second exhaust hole.

7. The rotary compressor of claim 5, wherein the middle separation plate comprises a first separation plate and a second separation plate which are stacked, the first separation plate is provided with a first cavity opened toward one side of the second separation plate, the second separation plate is provided with a second cavity opened toward one side of the first separation plate, the first cavity and the second cavity are combined to form the buffer chamber, the first separation plate is provided with the first discharge hole, and the second separation plate is provided with the second discharge hole.

8. The rotary compressor of claim 5, wherein the intermediate partition is a unitary structure, and the buffer chamber is formed on an outer side surface of the intermediate partition by an end mill machining process.

9. The rotary compressor of claim 4, wherein a side of the main bearing facing away from the first cylinder is provided with a first muffler, the first muffler is provided with a first muffling chamber and a muffling chamber exhaust hole communicated with the first muffling chamber, and an exhaust end of the main exhaust hole and an exhaust end of the exhaust channel are communicated with the first muffling chamber;

and/or one side of the auxiliary bearing, which deviates from the second cylinder, is provided with a second silencer, the second silencer is provided with a second silencing cavity, and the exhaust end of the auxiliary exhaust hole and the air inlet end of the exhaust channel are communicated with the second silencing cavity.

10. A refrigerating cycle apparatus comprising the rotary compressor of any one of claims 1 to 9.

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