Self-cooling structure for rotor type compressor and rotor type compressor

Abstract

The utility model discloses a self-cooling structure for a rotor type compressor and the rotor type compressor, which belong to the technical field of rotor type compressors and comprise a high-pressure shell, a low-pressure shell, a bottom cover, an air suction pipe, an air suction connecting pipe and an exhaust pipe, the high-pressure shell sleeves the outer side of the low-pressure shell, and the high-pressure shell and the low-pressure shell are both connected with the bottom cover; an air suction cavity is formed between the inner wall of the high-pressure shell and the outer wall of the low-pressure shell; an accommodating space is formed between the low-pressure shell and the bottom cover and is used for arranging the rotor type compressor; the air suction pipe is arranged at the top end of the high-pressure shell; a spiral guide plate is arranged on the surface of the inner wall of the high-pressure shell and used for enabling the low-temperature refrigerant entering the air suction cavity to flow in the preset spiral direction. The air suction connecting pipe penetrates through the low-pressure shell, and the exhaust pipe is arranged at the top end of the low-pressure shell and penetrates to the outer side of the high-pressure shell. The spiral guide plate is used for guiding the low-temperature refrigerant, the temperature of the compressor shell and the temperature of the motor are effectively reduced, and the self-cooling effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to rotor compressor technical field, especially relate to a kind of self-cooling structure for rotor compressor and rotor compressor. BACKGROUND

[0002] Rotor compressor, also known as rolling rotor compressor or rolling piston compressor, its working principle is based on the rotation of eccentric rotor in cylinder, with less parts, simple structure, reliable operation, small clearance volume, high gas transmission coefficient and the advantages of small size, light weight and balanced operation under the same refrigeration capacity, widely used in household appliances, industrial refrigeration and other fields, especially used in household refrigerator and air conditioner.

[0003] With the development of rotor compressor technology, its application environment is expanding, often need to face some special application environment, for example, high temperature, high humidity, etc.;Among them, the internal components of rotor compressor may expand when working in high temperature environment, resulting in smaller fitting clearance, and thus increasing friction and wear, affecting the performance and life of compressor. In addition, high temperature may accelerate the oxidation and metamorphism of lubricating oil, reduce its lubricating performance, further aggravate the wear of components. Secondly, in high temperature environment, the exhaust temperature of rotor compressor may be too high, not only increasing the energy consumption of system, but also causing damage to condenser and other system components.

[0004] At present, traditional cooling system, such as radiator, fan, etc. is usually installed on compressor system to help compressor dissipate heat. However, the heat dissipation effect of traditional cooling system is affected by many factors, such as environmental temperature, humidity, quality of cooling medium, etc. In extreme conditions, cooling system may not fully meet the heat dissipation demand of compressor. UTILITY MODEL CONTENTS

[0005] In view of the technical problems existing in the prior art, the utility model provides a self-cooling structure for rotor compressor and rotor compressor to solve the technical problem that the heat dissipation effect of traditional cooling system is affected by many factors, and may not fully meet the heat dissipation demand of compressor in extreme conditions.

[0006] To achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a kind of self-cooling structure for rotor compressor, including high pressure shell, low pressure shell, bottom cover, suction pipe, suction connecting pipe and exhaust pipe;

[0008] The high-pressure shell is sleeved outside the low-pressure shell, and the high-pressure shell and the low-pressure shell are connected with the bottom cover; wherein, an air suction cavity is formed between the inner wall of the high-pressure shell and the outer wall of the low-pressure shell; an accommodating space is formed between the low-pressure shell and the bottom cover, and the accommodating space is used for arranging a rotary compressor;

[0009] The air suction pipe is arranged at the top end of the high-pressure shell, and is used for sucking low-temperature refrigerant into the air suction cavity; the inner wall surface of the high-pressure shell is provided with a spiral guide plate, and the spiral guide plate is used for making the low-temperature refrigerant flowing into the air suction cavity flow along a preset spiral direction.

[0010] The air suction connecting pipe is arranged through the low-pressure shell, and is used for sucking the refrigerant in the air suction cavity into the inside of the rotary compressor; the exhaust pipe is arranged at the top end of the low-pressure shell and penetrates to the outside of the high-pressure shell; the exhaust pipe is used for discharging the high-temperature exhaust generated by the rotary compressor in the accommodating space to the outside of the high-pressure shell.

[0011] Further, the flow direction of the low-temperature refrigerant in the air suction cavity flowing along the preset spiral direction is opposite to the flow direction of the high-temperature exhaust in the low-pressure shell.

[0012] Further, the bottom end of the air suction pipe extends into the inside of the high-pressure shell; wherein, the extension length of the bottom end of the air suction pipe is 1-3mm.

[0013] Further, the top end of the high-pressure shell is further provided with an exhaust hole; the exhaust hole is arranged away from the side of the air suction pipe, and the exhaust pipe extends to the outside of the high-pressure shell through the exhaust hole.

[0014] Further, the hole diameter of the exhaust hole is greater than the outer diameter of the exhaust pipe, and the exhaust pipe and the exhaust hole are welded and fixed.

[0015] Further, the fixed side of the spiral guide plate is fixed with the inner wall of the high-pressure shell, and the guide side of the spiral guide plate faces the side of the outer wall of the low-pressure shell; wherein, the upper surface of the spiral guide plate is inclined downward to the center of the high-pressure shell.

[0016] Further, the bottom cover comprises a bottom cover body and an annular plate; the bottom cover body is a cylindrical structure with an open top end, the annular plate is fixedly sleeved outside the top end of the bottom cover body; the bottom end of the high-pressure shell and the bottom end of the low-pressure shell are welded and fixed on the upper surface of the annular plate.

[0017] Further, the upper surface of the annular plate is provided with a first annular step and a second annular step; the outer side of the top end of the first annular step is in close contact with the inner wall of the bottom end of the high-pressure shell, and the outer side of the top end of the second annular step is in close contact with the inner wall of the bottom end of the low-pressure shell.

[0018] Further, the top end of the high-pressure shell is also provided with a self-plug socket; the self-plug socket is used to be connected with the motor terminal connector of the rotary compressor.

[0019] The utility model also provides a rotary compressor, including compressor body and the self cooling structure for rotary compressor of the, wherein, the compressor body is arranged in the containing space formed between the low pressure shell and bottom cover of the self cooling structure for rotary compressor.

[0020] Compared with the prior art, the utility model has the advantages of:

[0021] The self cooling structure for rotary compressor provided by the utility model sets the high-pressure shell outside the low-pressure shell to form a double-shell design, and sets a spiral guide plate inside the high-pressure shell, so that the spiral guide plate guides the low-temperature refrigerant, the refrigerant can generate rotation or vortex effect when passing through the spiral guide plate, the temperature of the compressor shell and the motor is more effectively reduced, the self cooling effect is realized, the gas dynamics performance of the refrigerant is optimized by the spiral guide plate, the resistance and energy consumption of the refrigerant gas in the flow process are reduced, the harmful overheating generated in the suction process can be fully utilized by exhaust heat exchange, and the heat exchange efficiency is improved, the double-shell design sets the high-pressure shell outside the low-pressure shell, the cavity formed between the double shells can be used as a large-volume sound attenuation cavity, sound waves repeatedly reflect, refract and interfere when passing through the guide plate inside the shell, so that the propagation of noise is weakened, and the noise can be significantly reduced, meanwhile, the cavity formed between the double shells can fully exchange heat, and the energy efficiency of the compressor is effectively improved.

[0022] Further, the flow direction of the low-temperature refrigerant in the suction cavity along the preset spiral direction is opposite to the flow direction of the high-temperature exhaust gas in the low-pressure shell, which can ensure sufficient heat exchange between the refrigerant and the exhaust gas, effectively reduce the temperature of the exhaust gas, make the system condenser more efficiently exchange heat, optimize the heat management performance of the system, and ensure the stability and energy efficiency of the system under high-load operating conditions.

[0023] Further, the bottom end of the suction pipe extends into the interior of the high-pressure shell, which can ensure air tightness while reducing gas flow resistance. BRIEF DESCRIPTION OF DRAWINGS

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the self-cooling structure for a rotary compressor provided in Example 1, showing its usage status.

[0026] Figure 2 This is a schematic diagram of the high-pressure casing in Example 1;

[0027] Figure 3 This is a schematic diagram of the bottom cover structure in Example 1;

[0028] Figure 4 This is a schematic diagram of the overall structure of the rotary compressor provided in Example 2.

[0029] Among them, 1 is a high-pressure shell, 2 is a low-pressure shell, 3 is a bottom cover, 4 is an intake pipe, 5 is an intake connection pipe, 6 is an exhaust pipe, 7 is a pump body assembly, and 8 is a motor assembly; 101 is a spiral guide plate, 102 is an exhaust hole, 103 is a self-inserting terminal block; 301 is the bottom cover body, 302 is an annular plate, 303 is a first annular step, and 304 is a second annular step. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Example 1

[0032] As attached Figures 1-3 As shown, this embodiment 1 provides a self-cooling structure for a rotary compressor, including a high-pressure housing 1, a low-pressure housing 2, a bottom cover 3, a suction pipe 4, a suction connecting pipe 5, and a discharge pipe 6.

[0033] The high-pressure shell 1 is sleeved outside the low-pressure shell 2; specifically, the high-pressure shell 1 and the low-pressure shell 2 are both hollow cylinder structures with open lower ends, and the inner diameter of the high-pressure shell 1 is greater than the outer diameter of the low-pressure shell 2; the high-pressure shell 1 is coaxially sleeved outside the low-pressure shell 2, and an air suction cavity is formed between the inner wall of the high-pressure shell 1 and the outer wall of the low-pressure shell 2; wherein the air suction cavity serves as a flow space for low-temperature refrigerant.

[0034] The high-pressure shell 1 and the low-pressure shell 2 are both connected with the bottom cover 3; specifically, the bottom end of the high-pressure shell 1 is fixedly welded with the bottom cover 3, and the bottom end of the low-pressure shell 2 is fixedly welded with the bottom cover 3; wherein a containing space is formed between the low-pressure shell 2 and the bottom cover 3, and the containing space is used to arrange a rotary compressor.

[0035] It should be noted that the air suction cavity is a sealed cavity enclosed by the inner wall of the high-pressure shell 1, the outer wall of the low-pressure shell 2 and the bottom cover 3; and the containing space is a sealed space enclosed by the inner wall of the low-pressure shell 2 and the bottom cover 3.

[0036] A spiral flow guide plate 101 is arranged on the inner wall surface of the high-pressure shell 1, and the spiral flow guide plate 101 is used to make the low-temperature refrigerant entering the air suction cavity flow in a preset spiral direction; wherein the fixed side of the spiral flow guide plate 101 is fixed with the inner wall of the high-pressure shell 1, the flow guide side of the spiral flow guide plate 101 faces the outer wall side of the low-pressure shell 2, and the upper surface of the spiral flow guide plate 101 is inclined downward to the center of the high-pressure shell 1, so that the flow direction of the low-temperature refrigerant in the air suction cavity is opposite to the flow direction of the high-temperature exhaust gas in the low-pressure shell 2 when the low-temperature refrigerant flows in the preset spiral direction; preferably, the width of the spiral flow guide plate 101 is 3-5mm, that is, the distance between the fixed side and the flow guide side of the spiral flow guide plate 101 is 3-5mm.

[0037] In this embodiment 1, by arranging the spiral flow guide plate 101 on the inner wall surface of the high-pressure shell 1, and making the low-temperature refrigerant entering the air suction cavity flow in the spiral direction of the spiral flow guide plate 101, and the flow direction of the low-temperature refrigerant along the spiral flow guide plate 101 is opposite to the flow direction of the high-temperature exhaust gas in the low-pressure shell 2, so that the refrigerant can produce rotation or vortex effect when flowing along the spiral flow guide plate, thereby effectively reducing the temperature of the motor assembly in the low-pressure shell 2 and the rotary compressor, achieving the effect of self-cooling; secondly, by arranging the spiral flow guide plate 101, the gas dynamics performance of the refrigerant can be optimized, the resistance and energy consumption of the refrigerant gas in the flow process can be reduced, the harmful overheating generated in the suction process can be fully utilized through exhaust heat exchange, the heat exchange efficiency can be improved, and the exhaust temperature can be effectively reduced.

[0038] The top end of the high-pressure shell 1 is also provided with an exhaust hole 102, which is arranged away from one side of the air suction pipe 4; preferably, the exhaust hole 102 and the air suction pipe 4 are respectively located on both sides of the center of the top end of the high-pressure shell 1; the exhaust hole 102 serves as a channel for the exhaust pipe 6 to penetrate through the high-pressure shell 1; the top end of the high-pressure shell 1 is also provided with a self-plug socket 103, which is used to connect with the motor terminal connector of the rotary compressor.

[0039] The bottom cover 3 comprises a bottom cover body 301 and an annular plate 302, the bottom cover body 301 is a cylindrical structure with an open top end, and the annular plate 302 is fixedly sleeved outside the top end of the bottom cover body 301; wherein the bottom cover body 301 and the annular plate 302 are welded and fixed or the bottom cover body 301 and the annular plate 302 are an integral structure.

[0040] The bottom ends of the high-pressure shell 1 and the low-pressure shell 2 are perpendicular to and welded with the upper surface of the annular plate 302, so as to form a sealed cavity between the high-pressure shell 1, the low-pressure shell 2 and the annular plate 302, and form a containing space between the low-pressure shell 2 and the bottom cover body 301; preferably, the high-pressure shell 1 and the annular plate 302 are fixed by ring welding, and the low-pressure shell 2 and the annular plate 302 are fixed by ring welding.

[0041] The upper surface of the annular plate 302 is provided with a first annular step 303 and a second annular step 304, the outer diameter of the first annular step 303 matches the inner diameter of the high-pressure shell 1, the outer diameter of the second annular step 304 matches the inner diameter of the low-pressure shell 2, and the inner diameter of the second annular step 304 matches the inner diameter of the bottom cover body 301.

[0042] Specifically, the bottom end of the first annular step 303 is fixed with the upper surface of the annular plate 302, the top end of the first annular step 303 extends to the inside of the bottom end of the high-pressure shell 1, and the outer side of the top end of the first annular step 303 is in close contact with the inner wall of the bottom end of the high-pressure shell 1; by arranging the first annular step 303, the limiting and fixing effect of the high-pressure shell 1 is achieved, which facilitates the installation and limiting of the high-pressure shell 1 and the bottom cover 3.

[0043] The bottom end of the first annular step 303 is fixed with the upper surface of the annular plate 302, the top end of the second annular step 304 extends to the inside of the bottom end of the low-pressure shell 2, and the outside of the top end of the second annular step 304 is in close contact with the inner wall of the bottom end of the low-pressure shell 2; wherein the second annular step 304 is located above the top end of the bottom body 301; by setting the second annular step 304, the low-pressure shell 2 is limited and fixed, which is convenient for the installation and limiting between the low-pressure shell 2 and the bottom cover 3.

[0044] Preferably, the height of the first annular step 303 and the second annular step 304 is 1-3mm.

[0045] The suction pipe 4 is arranged at the top end of the high-pressure shell 1, for sucking the low-temperature refrigerant into the suction cavity; wherein the bottom end of the suction pipe 4 extends into the inside of the high-pressure shell 1, and the top end of the suction pipe 4 is connected to the evaporator; preferably, the bottom end of the suction pipe 4 extends into the inside of the high-pressure shell 1 by 1-3mm, that is, the distance between the bottom end of the suction pipe 4 and the inner wall of the top end of the high-pressure shell 1 is 1-3mm; by extending the bottom end of the suction pipe 4 into the inside of the high-pressure shell 1, the air tightness can be ensured while reducing the flow resistance of the refrigerant gas.

[0046] The suction connecting pipe 5 penetrates through the bottom end of the low-pressure shell 2, for sucking the refrigerant in the suction cavity into the inside of the rotary compressor; specifically, the suction connecting pipe 5 penetrates through the bottom end of the low-pressure shell 2 and is arranged close to the side of the bottom cover 3; one end of the suction connecting pipe 5 is in communication with the suction cavity, and the other end of the suction connecting pipe 5 extends to the inside of the low-pressure shell 2 and is connected with the suction port of the pump body assembly in the rotary compressor; by arranging the suction connecting pipe 5, the refrigerant flowing along the spiral flow guide plate 101 and exchanged with the high-temperature exhaust gas in the low-pressure shell 2 is sucked into the inside of the pump body assembly of the rotary compressor.

[0047] The exhaust pipe 6 is arranged at the top end of the low-pressure shell 2 and penetrates through the exhaust hole 102 to the outside of the high-pressure shell 1; wherein the exhaust pipe 6 is used for discharging the high-temperature exhaust gas generated by the rotary compressor in the containing space to the outside of the high-pressure shell 1; specifically, one end of the exhaust pipe 6 is fixed with the top end of the low-pressure shell 2, and the other end of the exhaust pipe 6 penetrates through the exhaust hole 102 and extends to the outside of the high-pressure shell 1 and is connected with the condenser; preferably, the diameter of the exhaust hole 102 is larger than the outer diameter of the exhaust pipe 6, and the diameter of the exhaust hole 102 is larger than the outer diameter of the exhaust pipe 6 by 0.1-0.3mm, which is convenient for the exhaust pipe to extend out of the high-pressure shell during later assembly; the exhaust pipe 6 and the exhaust hole 102 are welded and fixed to ensure the air tightness.

[0048] Assembly and working principle:

[0049] The self-cooling structure described in Embodiment 1 is assembled as follows: first, the rotor compressor is installed into the low-pressure shell 2; then, the bottom cover 3 is assembled with the low-pressure shell 2 and fixed by ring welding; next, the high-pressure shell 1 is sleeved outside the low-pressure shell 2, and the high-pressure shell 1 is fixed with the bottom cover 3 by ring welding; finally, the exhaust pipe 6 is welded with the exhaust hole 102.

[0050] When the self-cooling structure described in Embodiment 1 is running, the low-temperature refrigerant enters the suction cavity through the suction pipe 4 and flows downward along the spiral direction of the spiral flow guide plate 101 in the high-pressure shell 1; wherein, the low-temperature refrigerant flows along the spiral flow guide plate 101 and exchanges heat with the high-temperature exhaust in the low-pressure shell 1 in the opposite direction to reduce the temperature of the compressor shell and the motor assembly; then, the refrigerant that has flowed along the spiral flow guide plate 101 in the high-pressure shell 1 and exchanged heat with the high-temperature exhaust is sucked into the pump body assembly of the rotor compressor through the suction connecting pipe 5; the high-temperature exhaust flows upward in the low-pressure shell 2 and is discharged to the outside of the high-pressure shell 1 through the exhaust pipe 6.

[0051] The self-cooling structure for the rotor compressor described in Embodiment 1 forms a suction cavity between the high-pressure shell 1 and the low-pressure shell 2 through the double-shell structure of the high-pressure shell 1 and the low-pressure shell 2, and sets the spiral flow guide plate 101 on the inner wall of the high-pressure shell 1, so that the flow direction of the low-temperature refrigerant in the suction cavity is opposite to the flow direction of the high-temperature exhaust in the low-pressure shell 2, achieving sufficient exchange of heat between the refrigerant and the exhaust, which not only improves the energy efficiency of the system, but also makes full use of the harmful overheating generated in the traditional suction process through exhaust heat exchange.

[0052] In Embodiment 1, the high-pressure shell is sleeved outside the low-pressure shell to form a double-shell design, and the cavity formed between the double shells can serve as a large-volume sound-absorbing cavity. When sound waves pass through the flow guide plate inside the shell, they will repeatedly reflect, refract, and interfere, thereby weakening the propagation of noise and significantly reducing noise. This design eliminates the need for the traditional compressor sound-absorbing cotton structure, further simplifies the system structure, reduces manufacturing costs, and achieves double optimization of system overall performance and cost. In terms of gas treatment, the exhaust temperature is successfully reduced through effective cooling, enabling the system condenser to more efficiently exchange heat, thereby optimizing the system's thermal management performance and ensuring the stability and energy efficiency of the system under high-load operating conditions.

[0053] Embodiment 2

[0054] As shown in the accompanying Figure 4As shown, the embodiment 2 provides a rotor compressor, a compressor body and the self-cooling structure for the rotor compressor as described in the embodiment 1; wherein the compressor body is arranged in the accommodating space formed between the low-pressure shell 2 and the bottom cover 3 of the self-cooling structure for the rotor compressor.

[0055] Specifically, the rotor compressor comprises a pump body assembly 7 and a motor assembly 8, both of which are assembled in the low-pressure shell 2, and the pump body assembly 7 is close to the bottom cover 3, and the motor assembly 8 is arranged close to the top end side of the low-pressure shell 2.

[0056] In the embodiment 2, the pump body assembly comprises a main bearing, a secondary bearing, a rotor piston, a crankshaft and a cylinder; the main bearing and the secondary bearing are arranged on both sides of the cylinder respectively; the rotor piston is arranged in the cylinder; the secondary bearing is matched with the short shaft diameter of the crankshaft, the main bearing is matched with the long shaft diameter of the crankshaft, and the rotor piston is matched with the eccentric shaft diameter of the crankshaft; the motor assembly is connected with the crankshaft in the pump body assembly.

[0057] It should be noted that the assembly principle and process between the main bearing, the secondary bearing, the rotor piston, the crankshaft and the cylinder in the pump body assembly and between the crankshaft and the motor assembly are similar to those of the existing compressor pump body, which will not be described here.

[0058] The self-cooling mechanism and the rotor compressor, by introducing the double-shell design structure of the high-pressure shell and the low-pressure shell, and arranging the spiral guide plate in the high-pressure shell, the flow direction of the refrigerant in the high-pressure shell is opposite to the exhaust direction in the low-pressure shell, the noise is significantly reduced, and the heat is fully exchanged, the system energy efficiency is improved, and the harmful overheating generated in the suction process can be fully utilized through the exhaust heat exchange; the self-cooling structure and the compressor are not only suitable for the application fields of R32, RCO2 and other high-temperature manufacturing refrigerants, but also have wide application potential in the super-low temperature field caused by high pressure ratio.

[0059] The above embodiment is only one of the implementation manners capable of realizing the technical scheme of the utility model, the scope of the utility model claimed by the utility model is not limited by the embodiment, and any changes, substitutions and other implementation manners easily thought by those skilled in the art within the technical range disclosed by the utility model are also included.

Claims

1. A self-cooling structure for a rotary compressor, characterized in that, It includes a high-pressure housing (1), a low-pressure housing (2), a bottom cover (3), an intake pipe (4), an intake connection pipe (5), and an exhaust pipe (6); The high-pressure housing (1) is sleeved on the outside of the low-pressure housing (2), and both the high-pressure housing (1) and the low-pressure housing (2) are connected to the bottom cover (3); wherein, an air intake cavity is formed between the inner wall of the high-pressure housing (1) and the outer wall of the low-pressure housing (2); an accommodating space is formed between the low-pressure housing (2) and the bottom cover (3), and the accommodating space is used to install a rotary compressor; The suction pipe (4) is located at the top of the high-pressure housing (1) and is used to draw low-temperature refrigerant into the suction cavity; a spiral guide plate (101) is provided on the inner wall surface of the high-pressure housing (1) and is used to make the low-temperature refrigerant entering the suction cavity flow in a preset spiral direction. The suction connection pipe (5) is installed through the low-pressure housing (2) and is used to draw the refrigerant in the suction cavity into the interior of the rotary compressor; the exhaust pipe (6) is installed at the top of the low-pressure housing (2) and extends to the outside of the high-pressure housing (1); the exhaust pipe (6) is used to discharge the high-temperature exhaust generated by the rotary compressor in the housing space to the outside of the high-pressure housing (1).

2. The self-cooling structure for a rotary compressor according to claim 1, characterized in that, The flow direction of the low-temperature refrigerant in the intake cavity along the preset spiral direction is opposite to the flow direction of the high-temperature exhaust in the low-pressure shell (2).

3. The self-cooling structure for a rotary compressor according to claim 1, characterized in that, The bottom end of the suction pipe (4) extends into the interior of the high-pressure housing (1); wherein the length of the bottom end of the suction pipe (4) extending into the housing is 1-3 mm.

4. The self-cooling structure for a rotary compressor according to claim 1, characterized in that, The top of the high-pressure housing (1) is also provided with an exhaust port (102); the exhaust port (102) is located away from the intake pipe (4), and the exhaust pipe (6) extends to the outside of the high-pressure housing (1) through the exhaust port (102).

5. A self-cooling structure for a rotary compressor according to claim 4, characterized in that, The diameter of the exhaust hole (102) is larger than the outer diameter of the exhaust pipe (6), and the exhaust pipe (6) is welded and fixed to the exhaust hole (102).

6. A self-cooling structure for a rotary compressor according to claim 1, characterized in that, The fixed side of the spiral guide plate (101) is fixed to the inner wall of the high-pressure housing (1), and the guide side of the spiral guide plate (101) faces the outer wall of the low-pressure housing (2); wherein, the upper surface of the spiral guide plate (101) is inclined downward towards the center of the high-pressure housing (1).

7. A self-cooling structure for a rotary compressor according to claim 1, characterized in that, The bottom cover (3) includes a bottom cover body (301) and an annular plate (302); the bottom cover body (301) is a cylindrical structure with an open top, and the annular plate (302) is fixedly sleeved on the outer side of the top of the bottom cover body (301); the bottom end of the high pressure shell (1) and the bottom end of the low pressure shell (2) are both welded and fixed to the upper surface of the annular plate (302).

8. A self-cooling structure for a rotary compressor according to claim 7, characterized in that, The upper surface of the annular plate (302) is provided with a first annular step (303) and a second annular step (304); the outer top of the first annular step (302) is in close contact with the inner bottom wall of the high-pressure housing (1), and the outer top of the second annular step (304) is in close contact with the inner bottom wall of the low-pressure housing (2).

9. A self-cooling structure for a rotary compressor according to claim 1, characterized in that, The top of the high-pressure housing (1) is also provided with a self-connecting terminal block (103); the self-connecting terminal block (103) is used to connect to the motor terminal connector of the rotary compressor.

10. A rotary compressor, characterized in that, It includes a compressor body and a self-cooling structure for a rotary compressor as described in any one of claims 1-9; wherein the compressor body is disposed in the receiving space formed between the low-pressure housing (2) and the bottom cover (3) in the self-cooling structure for a rotary compressor.

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