CN212508829U - Cylinder assembly and rotary compressor - Google Patents

Abstract

The utility model relates to a compressor technical field provides a cylinder assembly and rotary compressor. The cylinder assembly includes: the inner periphery of the annular cylinder body is provided with a compression cavity; and the heat pipe assembly partially extends into the annular cylinder body and extends in the annular cylinder body to form an evaporation section which is embedded in the annular cylinder body and at least partially surrounds the compression cavity and a condensation section which extends out of the periphery of the annular cylinder body. The utility model discloses an evaporation zone buries underground in the annular cylinder body and at least partly surrounds the compression chamber, and the mode that the condensation zone stretches out in the periphery of annular cylinder body utilizes the super high heat conductivity of heat pipe subassembly in time to discharge the compression heat in the annular cylinder body, reduces the temperature of cylinder subassembly, promotes compressor instruction efficiency, can also reduce the heating of breathing in simultaneously, reduces the breathing in specific volume, improves the volumetric efficiency to improve the efficiency of compressor; the temperature of the air cylinder assembly can be further reduced due to the temperature reduction, the motor efficiency is improved, the temperature field of the whole machine can be improved, and the service life of parts is prolonged.

Description

Cylinder assembly and rotary compressor

Technical Field

The utility model relates to a compressor technical field, specifically speaking relates to a cylinder assembly and rotary compressor including this cylinder assembly.

Background

In the compressor with the existing structure, a clearance fit mode is adopted between the cylinder and the shell, a clearance is reserved between the air suction wall surface of the cylinder and the inner wall of the shell, and the clearance is filled with a high-temperature refrigerant and refrigerating machine oil in the actual operation process of the compressor.

Due to the high back pressure characteristic of the rotary compressor, the gap between the air suction wall surface of the cylinder and the inner wall of the shell is filled with the mixture of high-temperature refrigerant and refrigerating machine oil, which is not beneficial to the heat dissipation of the heat generated by the refrigerant compressed by the cylinder. Through the inside thermodynamic analysis discovery of compressor, the inside high temperature of cylinder can direct influence the consumption of compressor, and the wall temperature of breathing in of cylinder too high can direct influence the specific volume of breathing in, reduces the inspiratory capacity, and then leads to cold volume to reduce.

Therefore, in order to improve the cooling performance of the compressor, it is necessary to reduce the thermal resistance in the gap between the suction wall surface of the cylinder and the inner wall of the casing and to discharge the heat generated by the compression of the refrigerant by the cylinder.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present invention and therefore may include information that does not constitute prior art known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model provides a cylinder subassembly and rotary compressor including this cylinder subassembly can utilize the super high heat conductivility of heat pipe subassembly in time to discharge the compressor outside with the heat of compression in the annular cylinder body.

According to an aspect of the present invention, there is provided a cylinder assembly, comprising: the inner periphery of the annular cylinder body is provided with a compression cavity; a heat pipe assembly extending from an outer periphery of the annular cylinder partially into the annular cylinder and extending therein, forming an evaporation section embedded in the annular cylinder at least partially surrounding the compression chamber and a condensation section extending out of the outer periphery of the annular cylinder.

In some embodiments, the annular cylinder is provided with a radially through intake passage, and the evaporator end extends into the annular cylinder from a first side adjacent the intake passage and extends within the annular cylinder to a second side adjacent the intake passage.

In some embodiments, the evaporation section extends circumferentially in the annular cylinder, forming an arc shape that matches the shape of the annular cylinder.

In some embodiments, a first radial distance between the evaporator section and the inner wall of the annular cylinder and a second radial distance between the evaporator section and the outer wall of the annular cylinder are equal.

In some embodiments, the circumferential length C1 over which the evaporator section extends and the circumferential length C2 of the annular cylinder satisfy: 0.5 < C1/C2 < 1.

In some embodiments, a tube wall of the heat pipe assembly is provided with a wick, and a heat transfer medium in the heat pipe assembly transfers heat between the evaporation section and the condensation section under the action of the wick; or the heat pipe assembly is a gravity heat pipe, the condensing section extends out of the periphery of the annular cylinder body and then extends upwards along the direction vertical to the annular cylinder body, and heat transfer media in the heat pipe assembly transfer heat between the evaporation section and the condensing section under the action of gravity; or, the pipe wall of evaporation zone is equipped with the imbibition core, the condensation segment is the gravity heat pipe, the condensation segment stretches out behind the periphery of annular cylinder body along the perpendicular to the direction of annular cylinder body upwards extends.

In some embodiments, the non-large planar area of the annular cylinder is coated with an insulating material comprising a silicone rubber sheet.

The manufacturing process of the cylinder assembly according to any of the above embodiments includes: embedding the prepared evaporation section in a cylinder mould for casting the annular cylinder body; and casting a cylinder material in the cylinder mould to form the annular cylinder body embedded with the evaporation section, wherein the evaporation section at least partially surrounds the compression cavity.

According to another aspect of the present invention, there is provided a rotary compressor, comprising: the pump body assembly comprises the cylinder assembly and a crankshaft, wherein the lower end part of the crankshaft is arranged in the compression cavity in a penetrating mode; the motor assembly is sleeved at the upper end part of the crankshaft and comprises a rotor which transmits the rotating force to the compression cavity through the crankshaft and a stator which is sleeved outside the rotor and is in clearance fit with the rotor; and the pump body assembly and the motor assembly are contained in the shell, and the condensation section extends out of the shell.

The manufacturing process of the rotary compressor according to the above embodiment includes: embedding the prepared evaporation section in a cylinder mould for casting the annular cylinder body; casting a cylinder material in the cylinder mold to form the annular cylinder body embedded with the evaporation section, wherein the evaporation section at least partially surrounds the compression cavity; the crankshaft penetrates through the compression cavity, the rotor is sleeved outside the crankshaft in a cold pressing mode, the stator is sleeved on the inner wall of the shell in a hot mode, the pump body assembly is welded with the shell, and the pump body assembly and the motor assembly are contained in the shell; sealing the interface of the evaporation section on the peripheral surface of the annular cylinder body through a protective sleeve, and carrying out electrophoresis coating on the whole machine; and welding and communicating the condensation section and the evaporation section to form the rotary compressor with the heat pipe assembly.

Compared with the prior art, the utility model beneficial effect include at least:

by embedding the evaporation section of the heat pipe assembly in the annular cylinder body and at least partially surrounding the compression cavity, and extending the condensation section out of the periphery of the annular cylinder body, the ultrahigh heat conduction capacity of the heat pipe assembly is utilized to discharge the compression heat in the annular cylinder body out of the compressor in time, so that the temperature of the air cylinder assembly is reduced, the indication efficiency of the compressor is improved, meanwhile, the suction heating can be reduced, the suction specific volume is reduced, the volumetric efficiency is improved, and the energy efficiency of the compressor is improved; the temperature of the motor can be further reduced due to the temperature reduction of the air cylinder assembly, and the motor efficiency is improved;

meanwhile, the temperature of the cylinder assembly is reduced, so that the temperature of the pump body is improved, the temperature field of the whole machine is improved, and the service life of parts is prolonged.

In addition, compared with a fan-shaped cylinder body structure, the rigidity of the fan-shaped surface is equivalently increased, the deformation of the blade groove of the air cylinder assembly can be reduced, the leakage amount is further reduced, and the volumetric efficiency of the compressor is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 shows a schematic perspective view of a cylinder assembly in an embodiment of the invention;

figure 2 shows a schematic cross-sectional view of a cylinder assembly in an embodiment of the invention;

figure 3 shows a perspective schematic view of a heat pipe assembly in an embodiment of the invention;

FIG. 4 shows a schematic cross-sectional view of an evaporator section of a heat pipe assembly in an embodiment of the invention; and

fig. 5 shows a schematic cross-sectional view of a condenser section of a heat pipe assembly according to an embodiment of the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

Fig. 1 shows a perspective structure of a cylinder assembly in the embodiment, fig. 2 shows a sectional structure of the cylinder assembly, and fig. 3 shows a perspective structure of a heat pipe assembly. As shown in fig. 1 to 3, the cylinder assembly of the present embodiment mainly includes: the annular cylinder body 1, the inner periphery of the annular cylinder body 1 is provided with a compression cavity 10; the heat pipe assembly 2 partially extends into the annular cylinder 1 from the outer periphery of the annular cylinder 1 and extends in the annular cylinder 1, and forms an evaporation section 21 which is embedded in the annular cylinder 1 and at least partially surrounds the compression chamber 10 and a condensation section 22 which extends out of the outer periphery of the annular cylinder 1.

The heat pipe assembly 2 is filled with a heat transfer medium, and the heat pipe assembly 2 utilizes the phase change process of the heat transfer medium after being evaporated in the evaporation section 21 and then being condensed in the condensation section 22 to quickly transfer heat. The evaporation section 21 is embedded in the annular cylinder body 1 and at least partially surrounds the compression cavity 10, and when the air cylinder assembly works, the compression cavity 10 compresses a refrigerant to generate heat, so that the evaporation section 21 embedded in the annular cylinder body 1 is heated, and a heat transfer medium in the evaporation section 21 is rapidly vaporized to absorb the heat of the annular cylinder body 1. The vaporized heat transfer medium flows to the condensing section 22, heat is released from the condensing section 22, and the liquid heat transfer medium flows back to the evaporating section 21, so that the heat of the annular cylinder 1 is continuously conducted in a circulating mode.

Therefore, the cylinder assembly of the embodiment buries the evaporation section 21 of the heat pipe assembly 2 in the annular cylinder body 1 and surrounds the compression cavity 10 at least partially, and the condensation section 22 stretches out of the periphery of the annular cylinder body 1, the compression heat in the annular cylinder body 1 is discharged out of the compressor in time by utilizing the ultrahigh heat conduction capacity of the heat pipe assembly 2, the temperature of the cylinder assembly is favorably reduced, the indication efficiency of the compressor is improved, meanwhile, the suction heating can be reduced, the suction specific volume is reduced, the volumetric efficiency is improved, and the overall energy efficiency of the compressor is improved. The temperature of the air cylinder assembly can be further reduced due to the temperature reduction, the motor efficiency is improved, the temperature field of the whole machine can be improved, and the service life of parts is prolonged. In addition, the cylinder assembly of this embodiment adopts annular cylinder block 1, and annular cylinder block structure compares with the fan-shaped cylinder block structure of tradition, has increased the rigidity of sector department equivalently, can reduce the deformation of the blade groove department of cylinder assembly, and then reduces and lets out the volume efficiency of leakage, improvement compressor.

As shown in fig. 2, the annular cylinder 1 is provided with an intake passage 11 penetrating in the radial direction. In some embodiments, the evaporator section 21 extends into the annular cylinder 1 from the first side 11a near the intake passage 11 and extends in the annular cylinder 1 to the second side 11b near the intake passage 11. A vane groove 12 is also provided in the vicinity of the intake passage 11, and a vane is provided in the vane groove 12 for abutting against a piston (the piston and the vane are not shown in detail in fig. 2) located in the compression chamber 10 to divide a working chamber between the compression chamber 10 and the piston into two parts, a suction chamber and a discharge chamber. During the operation of the cylinder assembly, a refrigerant is sucked into the compression chamber 10 through the intake passage 11, and the piston eccentrically rotates in the compression chamber 10 to compress the refrigerant in the compression chamber 10. The evaporation section 21 extends from the first side 11a close to the air inlet channel 11 to the second side 11b close to the air inlet channel 11, the extension path of the evaporation section surrounds most of the area of the compression cavity 10, and the evaporation section 21 achieves good heat conduction effect on heat generated by the compression cavity 10 from the beginning of air suction of the cylinder assembly to the whole process of compressing the refrigerant.

The first side 11a and the second side 11b of the intake passage 11 are not limited to the positions shown in fig. 2, and the first side 11a and the second side 11b may be interchanged as long as it is achieved that the evaporation section 21 extends from one side of the intake passage 11 into the annular cylinder 1 and extends around the compression chamber 10 in the annular cylinder 1 to the other side of the intake passage 11 to surround most of the compression chamber 10 and conduct the heat generated by the compression chamber 10.

In some embodiments, referring to fig. 2, the evaporation section 21 extends circumferentially in the annular cylinder 1, forming an arc shape adapted to the shape of the annular cylinder 1. Therefore, the evaporation section 21 can surround the compression cavity 10 on one hand and conduct the compression heat of the annular cylinder body 1; on the other hand, the annular cylinder body 1 can be stably matched with the annular cylinder body 1, and the structure of the annular cylinder body 1 cannot be unbalanced due to deviation arrangement; on the other hand, the heat transfer medium can smoothly flow in the evaporation section 21, and the heat of the annular cylinder body 1 can be quickly taken away.

The circumferential length C1 over which the evaporation section 21 extends and the circumferential length C2 of the annular cylinder 1 can satisfy: 0.5 < C1/C2 < 1. For example, C1/C2 equals 0.6, C1/C2 equals 0.7, C1/C2 equals 0.8, and so on. That is, the area through which the evaporation section 21 extends in the annular cylinder 1 at least exceeds half the area of the body of the compression chamber 10, so that the evaporation section 21 surrounds a large area of the compression chamber 10, achieving a good heat transfer effect for the annular cylinder 1. In the preferred embodiment, the circumferential length C1 over which the evaporator section 21 extends in the annular cylinder 1 is as large as possible without influencing the intake process and the compression process, i.e. without the evaporator section 21 contacting the intake channel 11 and the vane grooves 12, in order to achieve a good heat transfer effect to the annular cylinder 1. Certainly, during actual production, the extension length of the evaporation section 21 needs to be determined according to the profile size of the large plane of the cylinder, so that the evaporation section 21 is ensured not to influence the normal operation of the cylinder, and a good heat conduction effect on the annular cylinder body 1 can be realized.

Further, with continued reference to fig. 2, the first radial distance H1 between the evaporation stage 21 and the inner wall of the annular cylinder 1 and the second radial distance H2 between the evaporation stage 21 and the outer wall of the annular cylinder 1 are equal to maintain the most stable state of the structure of the annular cylinder 1 in which the evaporation stage 21 is embedded. Of course, during actual production and use, the first radial distance H1 between the evaporation section 21 and the inner wall of the annular cylinder 1 and the second radial distance H2 between the evaporation section 21 and the outer wall of the annular cylinder 1 are not limited to be strictly equal, and can be maintained within a certain proportion range as long as the structure of the annular cylinder 1 is stable. For example, in some embodiments, first radial distance H1 and second radial distance H2 may satisfy the proportional relationship: H1/H2 is more than 0.8 and less than 1.3. Specifically, the ratio of the first radial distance H1 and the second radial distance H2 may be: 0.85, 0.92, 1, 1.15, 1.25, etc.

The heat pipe assembly 2 in each of the above embodiments may be a common heat pipe, and a wick disposed on a pipe wall is used to drive a heat transfer medium to flow; or a gravity heat pipe, and the heat transfer medium flows by utilizing the gravity action. Fig. 4 shows a sectional structure of the evaporation section 21 in the embodiment, fig. 5 shows a sectional structure of the condensation section 22, and in combination with fig. 1, 3 to 5, in some embodiments, the pipe wall 210 of the evaporation section 21 and the pipe wall 220 of the condensation section 22 of the heat pipe assembly 2 are provided with wicks (the wicks are not shown in detail), and the heat transfer medium in the heat pipe assembly 2 transfers heat between the evaporation section 21 and the condensation section 22 under the action of the wicks. Specifically, the liquid absorbing core is made of capillary porous material, when the evaporation section 21 of the heat pipe assembly 2 is heated, liquid is evaporated and vaporized, vapor flows to the condensation section 22 under a slight pressure difference, heat is released and condensed into liquid, the liquid flows back to the evaporation section 21 along the porous material under the action of capillary force, and therefore circulation is achieved, and heat of the annular cylinder body 1 is conducted to the condensation section 22 from the evaporation section 21.

In some embodiments, the heat pipe assembly 2 may be a gravity heat pipe, and the condensing section 22 extends upward in a direction perpendicular to the annular cylinder 1 after extending out of the periphery of the annular cylinder 1, so that the heat transfer medium in the heat pipe assembly 2 transfers heat between the evaporation section 21 and the condensing section 22 under the action of gravity. Specifically, as shown in fig. 1 and 3, when the evaporation section 21 embedded in the annular cylinder 1 is located at the lower side, the condensation section 22 extending out of the outer periphery of the annular cylinder 1 is located at the upper side, and the heat pipe assembly 2 is vertically placed, the backflow of the heat transfer medium can be satisfied by gravity without using a wick of a capillary structure.

In some embodiments, the heat pipe assembly 2 may also be in the form of a gravity heat pipe in combination with a wick. Specifically, the pipe wall of evaporation zone 21 is equipped with the wick, and condensation zone 22 is the gravity heat pipe, and condensation zone 22 stretches out behind the periphery of annular cylinder 1 along the direction of perpendicular to annular cylinder 1 upwards extending. Therefore, the heat transfer medium can flow back from the condensation section 22 to the evaporation section 21 by gravity, and the heat is conducted in the evaporation section 21 by the wick.

Further, considering that the heat source of the cylinder assembly (secondary heating of the annular cylinder 1 by the refrigerating machine oil and heat transfer of the high-temperature refrigerant) continuously exists, in some embodiments, the annular cylinder 1 may be subjected to heat insulation treatment, and a heat insulation material is coated on a non-large plane area of the annular cylinder 1 to eliminate the secondary heating influence of the high-temperature refrigerant and the refrigerating machine oil on the annular cylinder 1. The non-large plane area of the annular cylinder body 1 specifically refers to the lower end face and the outer peripheral face of the annular cylinder body 1, and the heat insulation material can be a silica gel rubber plate. Of course, the heat insulating material is not limited to the silicone rubber sheet, and in other embodiments, other materials capable of achieving heat insulation may be selected as the heat insulating material. Through the heat insulation treatment of the non-large plane area of the annular cylinder body 1, the secondary heating of the annular cylinder body 1 by high-temperature refrigerants and refrigerating machine oil can be obviously reduced, the heat transfer from the heat inside a compressor cylinder to an air suction cavity is reduced, the temperature of the air suction cavity under the same working condition is reduced, the air suction specific volume is favorably improved, the volumetric efficiency of the compressor is improved, and the energy efficiency of the compressor is further improved.

In summary, in the cylinder assembly of each embodiment, the ultrahigh heat conduction capability of the heat pipe assembly 2 is utilized to discharge the compression heat in the annular cylinder body 1 to the outside of the compressor in time, and meanwhile, the temperature of the cylinder assembly is further reduced through the heat insulation treatment of the annular cylinder body 1, so that the energy efficiency of the whole machine is improved.

The embodiment of the utility model provides a still provide a rotary compressor, rotary compressor includes: and the pump body assembly comprises the cylinder assembly described in any embodiment, and a crankshaft with the lower end part penetrating through the compression cavity of the annular cylinder body. Specifically, the lower end of the crankshaft is inserted into a piston located in the compression chamber. The pump body assembly further comprises an upper cylinder cover and a lower cylinder cover, the upper cylinder cover covers the upper end face of the annular cylinder body, the lower cylinder cover covers the lower end face of the annular cylinder body, the upper cylinder cover and the lower cylinder cover support the crankshaft on one hand, and a compression space of the annular cylinder body is limited on the other hand. The upper end of bent axle is located to the motor element, and motor element includes and locates the outer stator with rotor clearance fit of rotor with the cover through bent axle with the rotor of revolving force transmission to compression chamber with the cover. And the pump body assembly and the motor assembly are contained in the shell, and the condensation section extends out of the shell. Of course, the rotary compressor also includes some other conventional components, such as an accumulator, a muffler, an upper casing cover, a lower casing cover, etc., which will not be described in detail herein.

The rotary compressor of the embodiment can be suitable for refrigeration air conditioners such as air conditioners, refrigerators and the like, and heat of the pump body assembly is discharged out of the compressor by utilizing a heat pipe technology, so that the energy efficiency of the whole machine is improved.

The manufacturing process of the cylinder assembly in the above embodiment includes: embedding the prepared evaporation section in a cylinder mould for casting the annular cylinder body; wherein, the evaporation section is made of stainless steel. And casting a cylinder material in the cylinder mould to form an annular cylinder body in which an evaporation section is embedded, wherein the evaporation section at least partially surrounds the compression cavity. That is, when the cylinder assembly is manufactured, the manufactured evaporation section is embedded in the cylinder mold of the annular cylinder body casting, then the annular cylinder body with the evaporation section embedded therein can be obtained in the process of forming the annular cylinder body by casting, the manufacturing flow is simple, and the manufactured annular cylinder body with the evaporation section is stable in structure.

The condensation section of the heat pipe assembly is assembled in the pump body assembly at the air cylinder assembly, and is connected to the evaporation section after the whole machine is assembled.

Specifically, the manufacturing process of the rotary compressor in the above embodiment includes: firstly, embedding a manufactured evaporation section in a cylinder mould for casting an annular cylinder body; and secondly, casting a cylinder material in the cylinder mould to form an annular cylinder body with an embedded evaporation section, wherein the evaporation section at least partially surrounds the compression cavity. And thirdly, penetrating a crankshaft in the compression cavity, sleeving the motor rotor outside the crankshaft in a cold pressing manner, sleeving the stator on the inner wall of the shell in a hot manner, and welding the pump body assembly and the shell to form the pump body assembly and the motor assembly which are accommodated in the shell.

In the third step, after the crankshaft is arranged in the compression cavity of the annular cylinder body in a penetrating mode, components such as an upper cylinder cover and a lower cylinder cover are assembled, and the pump body assembly with the annular cylinder body is formed. The pump body assembly here is not yet equipped with a condensation section. In consideration of the fact that the weight and cost of the annular cylinder body are increased compared with those of the traditional fan-shaped cylinder body, the upper cylinder cover can be designed to be partially light, and therefore the energy efficiency is improved on the basis that the weight and cost of the whole machine are not increased. In addition, the non-compression cavity surface of the annular cylinder body can be subjected to heat insulation treatment, so that the secondary heating influence of high-temperature working medium on the annular cylinder body is eliminated, and the energy efficiency of the compressor is improved. And then, a rotor is sleeved outside the crankshaft in a cold pressing mode, the stator is sleeved on the inner wall of the shell in a hot mode, then the stator is sleeved outside the rotor in a clearance mode, the motor assembly is assembled, and the motor assembly and the pump body assembly are contained in the shell together. And then, welding the annular cylinder body and the shell, and simultaneously welding the upper shell cover and the lower shell cover and welding the liquid storage device outside the shell in a three-spot welding mode. At this time, other parts of the rotary compressor are basically assembled except the condensation section of the heat pipe assembly.

And continuing the fourth step, sealing the interface of the evaporation section positioned on the peripheral surface of the annular cylinder body through the protective sleeve, and then carrying out electrophoresis coating on the whole machine. And step five, welding and communicating the condensation section and the evaporation section to form the rotary compressor with the heat pipe assembly. The condensing section of the heat pipe assembly extends out of the shell, so that heat generated by the annular cylinder body can be discharged out of the compressor, and the overall energy efficiency of the compressor is improved. The temperature reduction of the annular cylinder body is also beneficial to improving the temperature of the pump body, so that the temperature field of the whole machine is improved, and the service life of parts is prolonged.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (8)

1. A cylinder assembly, comprising:

the inner periphery of the annular cylinder body is provided with a compression cavity;

a heat pipe assembly extending from an outer periphery of the annular cylinder partially into the annular cylinder and extending therein, forming an evaporation section embedded in the annular cylinder at least partially surrounding the compression chamber and a condensation section extending out of the outer periphery of the annular cylinder.

2. The cylinder assembly as claimed in claim 1, wherein said annular cylinder block is provided with an intake passage extending radially therethrough, said evaporator end extending into said annular cylinder block from a first side adjacent said intake passage and extending within said annular cylinder block to a second side adjacent said intake passage.

3. The cylinder assembly as claimed in claim 2, wherein said evaporator end extends circumferentially within said annular cylinder block to form an arcuate shape conforming to the shape of said annular cylinder block.

4. The cylinder assembly of claim 3, wherein a first radial distance between the evaporator end and the inner wall of the annular cylinder block and a second radial distance between the evaporator end and the outer wall of the annular cylinder block are equal.

5. The cylinder assembly as claimed in claim 3, wherein a circumferential length C1 over which said evaporator section extends and a circumferential length C2 of said annular cylinder block satisfy: 0.5 < C1/C2 < 1.

6. The cylinder assembly of claim 1, wherein a tube wall of said heat pipe assembly is provided with a wick, and a heat transfer medium within said heat pipe assembly transfers heat between said evaporation section and said condensation section under the action of said wick; or

The heat pipe assembly is a gravity heat pipe, the condensing section extends out of the periphery of the annular cylinder body and then extends upwards along the direction vertical to the annular cylinder body, and heat transfer media in the heat pipe assembly transfer heat between the evaporation section and the condensing section under the action of gravity; or

The pipe wall of evaporation zone is equipped with the imbibition core, the condensation segment is the gravity heat pipe, the condensation segment stretches out behind the periphery of annular cylinder body along the perpendicular to the direction of annular cylinder body upwards extends.

7. The cylinder assembly as claimed in claim 1, wherein the non-large planar area of the annular cylinder block is coated with an insulating material comprising a silicone rubber sheet.

8. A rotary compressor, comprising:

a pump body assembly comprising a cylinder assembly according to any one of claims 1 to 7 and a crankshaft having a lower end portion disposed through the compression chamber;

the motor assembly is sleeved at the upper end part of the crankshaft and comprises a rotor which transmits the rotating force to the compression cavity through the crankshaft and a stator which is sleeved outside the rotor and is in clearance fit with the rotor; and

the pump body assembly and the motor assembly are contained in the shell, and the condensation section extends out of the shell.

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