Rotary compressor

Abstract

A rotary compressor comprises a shell, a motor and a compression pump, the motor is arranged in the shell, the compression pump is arranged in the shell, an oil storage area is formed between a second end face of a cylinder body of the compression pump and a bottom cover of the shell, refrigerating machine oil is stored in the oil storage area, the oil quantity of the refrigerating machine oil in the oil storage area is V, the inner diameter of a main shell is M, and the inner diameter of the main shell is M; when the distance between the bottommost surface in the bottom cover and the bottom surface of the cylinder of the compression pump is H and the circumference ratio is pi, 25% < = V / (pi (M / 2) 2H) < = 40% is satisfied. Therefore, the overall oil filling amount and the refrigerant amount can be effectively reduced, the energy efficiency is improved, and the problems in the prior art are effectively solved. In addition, the design accords with the hydrocarbon refrigerant trend, has the characteristic of simplifying the assembly process, and is beneficial for the refrigerant to play an optimal role in the system.

Description

Technical Field

[0001] The utility model relates to the field of compression mechanism structures, and particularly to a rotary compressor. Background Art

[0002] Existing rotary compressors mainly include the following components: exhaust pipe, housing, motor (stator, rotor), crankshaft, upper bearing, silencer cover, compression unit (cylinder block, ring, vane), lower bearing, bottom cover, outlet pipe, liquid receiver and inlet pipe. The basic working principle of the compressor is as follows: when the compressor is powered on, the stator generates a magnetic field, causing the rotor to rotate, driving the crankshaft, and making the ring perform an eccentric motion in the cylinder block, thereby compressing the low-temperature and low-pressure gas refrigerant medium into a high-temperature and high-pressure gas, which is discharged from the cylinder block through the silencer cover into the housing. Then, after passing through the cutting edge outside the stator and the gap between the rotors, it is discharged into the refrigeration cycle system through the outlet pipe.

[0003] In response to the issue of energy conservation and carbon reduction, hydrocarbon refrigerants are receiving extensive attention in the industry. When applying hydrocarbon refrigerants to refrigeration systems, there is an important technical challenge: hydrocarbon refrigerants are highly flammable, which requires strict restrictions on the filling amount of refrigerants in the refrigeration system. Therefore, it is necessary to significantly reduce the amount of refrigerant in the compressor housing, thereby reducing the filling amount of refrigerant in the entire refrigeration system. In traditional compressors, to ensure the reliability of compressor operation, sufficient lubricating oil needs to be filled to ensure the height of the oil level inside the compressor. However, due to the good compatibility between hydrocarbon refrigerants and lubricating oil, the lubricating oil will contain a relatively high proportion of refrigerant, which may result in insufficient refrigerant during the operation of the refrigeration system. Therefore, reducing the filling amount of lubricating oil inside the compressor and thereby reducing the refrigerant content inside the compressor is an effective method to solve this problem. This can not only reduce the filling amount of refrigerant in the entire refrigeration system but also ensure the safety and operating efficiency of the system.

[0004] However, current rotary compressors need to fill lubricating oil to maintain the height of the oil level inside the compressor to ensure the reliability of operation. Since the R290 refrigerant and lubricating oil have good compatibility, the more lubricating oil is injected into the compressor, the more R290 refrigerant will dissolve in the refrigeration oil, which will have a certain impact on the performance of the compressor and lead to a decrease in working efficiency. This remains a problem that developers and researchers in related industries such as compressors need to continuously overcome and solve. Summary of the Utility Model

[0005] Therefore, the main purpose of the present utility model is to provide a rotary compressor that reduces the oil filling amount of the compressor, reduces the amount of refrigerant dissolved in the oil, thereby effectively reducing the refrigerant filling amount, and improving the operating safety of a combustible refrigerant compressor to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above object, the present utility model provides a rotary compressor, comprising:

[0007] A housing, which is composed of a main housing, a top cover and a bottom cover;

[0008] A motor, which is disposed within the housing;

[0009] A compression pump, which is disposed within the housing and below the motor, and the compression pump includes:

[0010] A cylinder block, which has a first end face and a second end face, and a compression chamber is provided at the center of the cylinder block. A vane groove, a spring hole and a suction hole are formed on the wall of the compression chamber. The spring hole communicates with the vane groove, and the suction hole is independent and non - communicating with the vane groove and the spring hole;

[0011] A ring, which is rotatably disposed within the compression chamber of the cylinder block;

[0012] A vane, which is reciprocally movably disposed within the vane groove of the cylinder block, and the front end of the vane abuts against the outer peripheral surface of the ring;

[0013] At least one spring, which is disposed within each spring hole of the vane, causing the front end of the vane to abut against the outer peripheral surface of the ring;

[0014] An upper support, which is disposed within the housing and above the cylinder block;

[0015] A lower support, which is disposed within the housing and below the cylinder block; and

[0016] A crankshaft, which is disposed within the housing, and the upper support, the motor, the ring and the lower support are sleeved on the crankshaft;

[0017] Wherein, an oil storage area is formed between the second end face of the cylinder block of the compression pump and the bottom cover of the housing, and the oil storage area is for storing refrigeration oil. The amount of the refrigeration oil in the oil storage area is V, the inner diameter of the main housing is M, the distance between the bottommost surface within the bottom cover and the bottom surface of the cylinder block of the compression pump is H, and when the pi is set as π, 25% ≤ V / (π(M / 2)2H) ≤ 40% is satisfied.

[0018] Preferably, the bottom cover has a joint portion corresponding to the inner edge wall of the main housing, and the joint portion is bent into a U - shaped structure; and a stepped portion, and the stepped portion is a hollow structure.

[0019] Preferably, a plurality of protrusions are provided on the outer ring of the joint portion of the bottom cover. When the joint portion of the bottom cover is disposed within the bottom end of the main housing, the bottom end of the main housing is connected to the protrusions.

[0020] Preferably, the number of the protrusions of the joint portion is three or more, and the protrusions are arranged at equal distances.

[0021] Preferably, it further includes a plurality of fixing members respectively disposed at the positions where the protrusions of the joint portion of the bottom cover connect to the bottom end of the main housing to fix the bottom cover to the main housing.

[0022] Preferably, the fixing member is a spot welding structure welded between the protrusions of the joint portion of the bottom cover and the bottom end of the main housing.

[0023] Preferably, the stepped portion of the bottom cover includes an annular area and a recessed area, and the recessed area is located in the annular area and extends downward.

[0024] Preferably, the recessed area is an annular structure and is disposed at the central position of the annular area. The radial end of the recessed area is connected to the radial outer end of the annular area, and the recessed area is a structure extending downward.

[0025] Preferably, the inner diameter of the annular area is M1, the inner diameter of the recessed area is M2, and 2 ≤ M1 / M2 ≤ 3 is satisfied.

[0026] From the above structure, the beneficial effects of the present utility model are as follows: An improved oil-reducing bottom cover design is proposed, which is applicable to the full series of rotary compressors. While maintaining the original performance, it can reduce the oil volume between the cylinder block and the bottom cover by 55%. A storage area is defined between the second end face of the cylinder block of the compression pump and the bottom cover of the housing, and the storage area is for storing refrigeration oil. The oil volume of the refrigeration oil in the storage area is V, the inner diameter of the main housing is M, the distance value between the bottommost surface in the bottom cover and the bottom surface of the cylinder block of the compression pump is H, and when the pi is set as π, 25% ≤ V / (π(M / 2)²H) ≤ 40% is satisfied. In this way, the overall filling oil volume and refrigerant volume can be effectively reduced, the energy efficiency can be improved, and the problems faced by the prior art can be effectively solved. In addition, this design conforms to the trend of hydrocarbon refrigerants and has the characteristics of simplifying the assembly process, which helps the refrigerant to play the best role in the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the rotary compressor of the present utility model.

[0028] Figure 2 For the present utility model Figure 1 Partial cross-sectional view.

[0029] Figure 3 It is a cross-sectional view of the compression pump of the rotary compressor of the present utility model.

[0030] Figure 4 It is a perspective view of the bottom cover of the rotary compressor of the present utility model.

[0031] Figure 5 It is a top view of the bottom cover of the rotary compressor of the present utility model.

[0032] Figure 6 This is a sectional view of the bottom cover of the rotary compressor of the present utility model.

[0033] Symbol description:

[0034]

[0035] Specific implementation manners

[0036] In order to understand the features, contents, advantages and achievable effects of the present utility model, the present utility model will be described in detail below in conjunction with the drawings and in the form of embodiments. The drawings used herein are only for the purpose of illustration and assisting the description, and are not necessarily the true proportions and precise configurations after the implementation of the present utility model. Therefore, the scope of rights in actual implementation of the present utility model should not be interpreted or limited by the proportional and configurational relationships of the attached drawings.

[0037] The advantages, features and achieved technical methods of the present utility model will be described in more detail with reference to the exemplary embodiments and the accompanying drawings and will be more easily understood. Moreover, the present utility model may be implemented in different forms. Therefore, it should not be understood as being limited only to the embodiments described herein. On the contrary, for those with ordinary knowledge in the technical field, the provided embodiments will make this disclosure more thorough, comprehensive and completely convey the scope of the present utility model, and the present utility model will only be defined by the appended claims.

[0038] First, please refer to Figures 1 to 6 , which is the rotary compressor of the present utility model. The rotary compressor 1 includes: a housing 11, a motor 12 and a compression pump 13. The rotary compressor 1 of the present utility model is presented in the form of a vertical compressor.

[0039] The housing 11 is an overall hollow body. The housing 11 is composed of a main housing 111, a top cover 112 and a bottom cover 113. The housing 11 is used to accommodate components such as the motor 12 and the compression pump 13. An outlet pipe 1121 is provided on the housing 11. The outlet pipe 1121 is provided at any one of the top cover 112 or the main housing 111. In this figure, the outlet pipe 1121 is shown to be provided on the top cover 112. Among them, the housing 11 can be of various existing structural forms on the market, and its structural form is not limited.

[0040] As described above, the structure of the bottom cover 113 will be further described. The bottom cover 113 has a joint portion 1131 corresponding to the inner edge wall of the main housing 111, and the joint portion 1131 is bent into an inverted U-shaped structure; and a stepped portion 1132 connected to the joint portion 1131, and the stepped portion 1132 is a hollow structure. In addition, a plurality of protrusions 11311 are provided on the outer ring of the joint portion 1131 of the bottom cover 113. When the joint portion 1131 of the bottom cover 113 is disposed inside the bottom end of the main housing 111, the bottom end of the main housing 111 is connected to the protrusions 11311. The shape of each protrusion 11311 of the joint portion 1131 is not limited, and the number of protrusions 11311 of the joint portion 1131 is three or more, and these protrusions 11311 are arranged at equal intervals. If the number of protrusions 11311 of the joint portion 1131 is three, they are arranged in an equilateral triangle; and the joint portion 1131 and the stepped portion 1132 are integrally formed.

[0041] As described above, it further includes a plurality of fixing members 114, and these fixing members 114 are respectively disposed at the positions where each protrusion 11311 of the joint portion 1131 of the bottom cover 113 is connected to the bottom end of the main housing 111, so as to fix the bottom cover 113 to the main housing 111. Furthermore, the fixing member 114 is a spot welding structure and is welded between each protrusion 11311 of the joint portion 1131 of the bottom cover 113 and the bottom end of the main housing 111.

[0042] As described above, the stepped portion 1132 of the bottom cover 113 includes an annular region 11321 and a concave region 11322, and the concave region 11322 is located in the annular region 11321 and extends downward. Furthermore, the concave region 11322 is an annular structure, the concave region 11322 is disposed at the central position of the annular region 11321, the radial end of the concave region 11322 is connected to the radial outer end of the annular region 11321, and the concave region 11322 is a structure extending downward. The inner diameter of the annular region 11321 is M1, the inner diameter of the concave region 11322 is M2, and 2 ≤ M1 / M2 ≤ 3; and the annular region 11321 and the concave region 11322 are integrally formed.

[0043] The motor 12 is disposed inside the housing 11. The motor 12 includes a stator 121 fixed to the inner wall of the main housing 111 of the housing 11; and a rotor 122 rotatably disposed inside the stator 121. Among them, the motor 12 can be various existing structural forms on the market, and its structural form is not limited.

[0044] The compression pump 13 is disposed within the main housing 111 of the housing 11. The compression pump 13 is located below the motor 12. The compression pump 13 includes a cylinder block 131. The cylinder block 131 is disposed within the main housing 111 of the housing 11 and is located below the motor 12. The cylinder block 131 has a first end face 1311 and a second end face 1312. A compression chamber 1313 penetrating through the upper and lower ends is provided at the center of the cylinder block 131. A vane groove 1314, a spring hole 1315, and a suction port 1316 are formed on the wall of the compression chamber 1313. The spring hole 1315 does not completely penetrate the wall of the compression chamber 1313. The spring hole 1315 communicates with the vane groove 1314. The suction port 1316 is independent and non - communicating with the vane groove 1314 and the spring hole 1315. A ring 132 is rotatably disposed within the compression chamber 1313 of the cylinder block 131. A vane 133 is reciprocally movably disposed within the vane groove 1314 of the cylinder block 131. The front end of the vane 133 abuts against the outer peripheral surface of the ring 132, dividing the compression chamber 1313 into a suction chamber and a compression chamber. At least one spring 134 is disposed within each spring hole 1315, and the spring 134 is located at the rear end of the vane 133, causing the front end of the vane 133 to abut against the outer peripheral surface of the ring 132, while the rear end of the spring 134 abuts against the inner wall of the main housing 111 of the housing 11. By the telescopic movement of the spring 134 within the spring hole 1315, the front end of the vane 133 abuts against the ring 132 eccentrically rotating within the compression chamber 1313 and performs reciprocating motion. An upper support 135 is disposed within the housing 11 and is located above the cylinder block 131. A lower support 136 is disposed within the housing 11 and is located below the cylinder block 131. A crankshaft 137 is formed by extending longitudinally for an appropriate length. The crankshaft 137 is disposed within the housing 11. The crankshaft 137 has at least one eccentric portion 1371, and the eccentric portion 1371 is located at an appropriate distance from the lower end of the crankshaft 137, defining an upper shaft section 1372 and a lower shaft section 1373 of the crankshaft 137. The upper shaft section 1372 is sleeved by the upper support 135 and the rotor 122 of the motor 12. The lower shaft section 1373 is sleeved by the lower support 136, and each eccentric portion 1371 is sleeved by the ring 132 of each cylinder block 131. Among them, the compression pump 13 can be of various existing structural forms on the market, and its structural form is not limited.

[0045] In particular, the number of the cylinder block 131 and the ring 132 is not limited; that is, the compression pump 13 can be of single-cylinder, double-cylinder or more than three-cylinder types, etc. The cylinder block 131 and the ring 132 can be correspondingly arranged as one, two or more than three. The number of the rings 132 is determined according to the type of the cylinder block 131 and is rotatably arranged in the compression chamber 1313 of the cylinder block 131. In this figure, the compression pump 13 is of single-cylinder type.

[0046] Furthermore, an oil storage area 110 is formed between the second end face 1312 of the cylinder block 131 of the compression pump 13 and the bottom cover 113 of the housing 11. The oil storage area 110 is for storing refrigeration oil. The amount of the refrigeration oil in the oil storage area 110 is V, the inner diameter of the main housing 111 is M, the distance between the bottommost surface in the bottom cover 113 and the bottom surface of the cylinder block 131 of the compression pump 13 is H, and when the pi is set as π, and 25% ≤ V / (π(M / 2)²H) ≤ 40% is satisfied, the overall filling amount of oil and the amount of refrigerant of the rotary compressor 1 are reduced.

[0047] With the above structure described, it is further described as follows:

[0048] In this embodiment, the rotary compressor 1 further includes a filter bottle 14 made of metal material. The filter bottle 14 is formed by extending a proper length longitudinally, and an accommodation space 140 is defined inside it. An inlet pipe 141 is provided at the top of the filter bottle 14, and at least one inner pipe 142 of the filter bottle is arranged inside the filter bottle 14. The inner pipe 142 of the filter bottle extends outside the filter bottle 14 and extends into the housing 11 and is connected to the suction port 1316 of the cylinder block 131 of the compression pump 13, so that the filter bottle 14 is located on one side of the housing 11. The low-pressure gas (refrigerant) in the filter bottle 14 is transmitted to the suction port 1316 of the cylinder block 131 of the compression pump 13 through the inner pipe 142 of the filter bottle, and then transmitted into the compression chamber 1313 to be continuously compressed to a certain pressure and then output to the space inside the housing 11.

[0049] Furthermore, the inner pipe 142 of the filter bottle 14 and the cylinder block 131 of the compression pump 13 are in a connected state. A refrigeration cycle system is connected between the inlet pipe 141 of the filter bottle 14 and the outlet pipe 1121 of the housing 11 of the rotary compressor 1. The number of the inner pipes 142 of the filter bottle 14 is not limited, that is, it is determined according to the compression pump 13 of single-cylinder, double-cylinder or more than three-cylinder types, etc.; among them, the filter bottle 14 can be of various existing structural forms on the market, and its structural form is not limited.

[0050] In this embodiment, the rotary compressor 1 further includes an electrical connector assembly 15. The electrical connector assembly 15 is disposed on the main housing 111 or the top cover 112. As shown in this figure, the electrical connector assembly 15 is disposed on the top cover 112 and is coupled to the motor 12 for electrical connection. Among them, the electrical connector assembly 15 can be various existing structural forms on the market, and its structural form is not limited.

[0051] In this structure, when the rotor 122 of the motor 12 rotates, it drives the crankshaft 137 to rotate eccentrically, so that the eccentric part 1371 of the crankshaft 137 can drive the ring 132 to rotate in the compression chamber 1313 of the cylinder block 131. The upper shaft section 1372 and the lower shaft section 1373 of the crankshaft 137 are used to support the upper support 135 and the lower support 136 and make them operate at high speed, causing the entire compression pump 13 to be in an operating state. The gaseous refrigerant is sucked into the compression chamber 1313 inside the cylinder block 131 of the compression pump 13 and is continuously compressed to a certain pressure, and then the compressed refrigerant is discharged. However, in order to reduce the filling amount of the lubricating oil (refrigeration oil) of the rotary compressor 1 and further reduce the refrigerant content inside the rotary compressor 1. Therefore, an improved oil sump cover design is proposed, which is applicable to the full series of rotary compressors 1 and can reduce the oil amount between the cylinder block 131 and the bottom cover 113 by 55% while maintaining the original performance (for example: if the structure of the present utility model is used, assuming that the refrigerant in the housing 11 is R290 and the original filling amount of the oil is 140 CC, it can be reduced to a filling amount of 60 CC). It defines a storage area 10 is formed between the second end face 1312 of the cylinder block 131 of the compression pump 13 and the bottom cover 113 of the housing 11. The storage area 10 is for storing refrigeration oil, and the oil amount of the refrigeration oil in the storage area 10 is V, the inner diameter of the main housing 111 of the housing 11 is M, and the distance value between the bottommost surface in the bottom cover 113 and the bottom surface of the cylinder block 131 of the compression pump 13 is H. Further explanation, the bottommost surface in the bottom cover 113 is the inner bottom surface of the recessed area 11322 of the stepped portion 1132 of the bottom cover 113, and the bottom surface of the cylinder block 131 of the compression pump 13 is the second end face 1312 of the cylinder block 131 of the compression pump 13, that is, the distance between the second end face 1312 of the cylinder block 131 of the compression pump 13 and the inner bottom surface of the recessed area 11322 of the bottom cover 113; and when the pi is set to π, and 25% ≤ V / (π(M / 2)2H) ≤ 40% is satisfied. Under this condition limit, the space of the storage area 110 will be reduced, but the liquid level height of the refrigeration oil can still be maintained, the refrigerant mixing into the refrigeration oil can be reduced, the limited refrigerant amount can be exerted, the maximum cooling capacity can be generated, the overall filling oil amount and refrigerant amount can be effectively reduced, the energy efficiency can be improved, and there is no need to add foreign objects (such as: mass blocks, pads, etc.) in the bottom cover 113, and the problems faced by the prior art can be effectively solved. In addition, this design conforms to the trend of hydrocarbon refrigerants and has the characteristics of simplifying the assembly process, which helps the refrigerant to play the best role in the system.

[0052] It should be noted that the structure of the rotary compressor 1 of the present utility model is not only applicable to the rotary compressor 1 using R290 refrigerant, but also applicable to the rotary compressor 1 using other environmentally friendly refrigerants.

[0053] In view of the above, the present utility model provides a rotary compressor 1, so as to reduce the oil filling amount of the compressor, reduce the amount of refrigerant dissolved in the oil, thereby effectively reducing the refrigerant filling amount, improving the safety of the operation of the combustible refrigerant compressor, and achieving the purpose of enhancing the efficiency of the rotary compressor 1.

[0054] The above are only embodiments of the present utility model, and the scope of implementation of the present utility model cannot be limited thereby. All simple equivalent changes and modifications made according to the claims of the present utility model and the content of the patent specification still fall within the scope covered by the patent of the present utility model.

Claims

1. A rotary compressor, characterized in that: include: A housing, consisting of a main shell, a top cover and a bottom cover; an electric motor disposed in the housing; A compression pump is disposed in the housing and below the motor, the compression pump comprising: A cylinder body is formed with a first end face and a second end face, a compression chamber is provided at the center of the cylinder body, a vane groove, a spring hole and a suction hole are provided on the cavity wall of the compression chamber, the spring hole is communicated with the vane groove, and the suction hole is independent of the vane groove and the spring hole and is not communicated with each other; a ring rotatably disposed in the compression chamber of the cylinder; a blade, reciprocatably disposed in the blade groove of the cylinder body, the front end of the blade abutting against the outer peripheral surface of the ring; At least one spring is disposed in each of the spring holes of the blade, so that the front end of the blade abuts against the outer peripheral surface of the ring; An upper support is disposed in the housing and located above the cylinder body; a lower support disposed in the housing and located below the cylinder; and A crankshaft is disposed in the housing, and the upper support, the motor, the ring and the lower support are sleeved on the crankshaft; Among them, an oil storage area is formed between the second end surface of the cylinder body of the compression pump and the bottom cover of the shell, and the oil storage area is for storing refrigeration oil. The amount of refrigeration oil in the oil storage area is V, the inner diameter of the main shell is M, the distance between the bottommost surface inside the bottom cover and the bottom surface of the cylinder body of the compression pump is H, and when pi is set to π, it satisfies 25%≤V / (π(M / 2)2H)≤40%.

2. The rotary compressor according to claim 1, characterized in that: The bottom cover has a joint portion corresponding to the inner edge wall of the main shell, the joint portion is bent into a U-shaped structure; and a step portion, the step portion is a hollow structure.

3. The rotary compressor according to claim 2, characterized in that: The outer ring of the joint part of the bottom cover is provided with a plurality of protrusions. When the joint part of the bottom cover is arranged in the bottom end of the main shell, the bottom end of the main shell is connected with the protrusions.

4. The rotary compressor according to claim 3, characterized in that: The number of the protrusions on the joint portion is three or more, and the protrusions are arranged at equal distances.

5. The rotary compressor according to claim 4, characterized in that: It further includes a plurality of fixing members, which are respectively arranged at the positions where the protrusions of the joint portion of the bottom cover and the bottom end of the main shell are connected, so as to fix the bottom cover to the main shell.

6. The rotary compressor according to claim 5, characterized in that: The fixing piece is a spot welding structure so as to be welded between each protrusion of the joint portion of the bottom cover and the bottom end of the main shell.

7. The rotary compressor according to claim 2, wherein: The step portion of the bottom cover consists of an annular area and a recessed area, wherein the recessed area is located in the annular area and extends downward.

8. The rotary compressor according to claim 7, characterized in that: The recessed area is an annular structure and is arranged at the center of the annular area. The radial end of the recessed area is connected to the radial outer end of the annular area. The recessed area is a structure extending downward.

9. The rotary compressor according to claim 7, wherein: The inner diameter of the annular area is M1, the inner diameter of the recessed area is M2, and 2≤M1 / M2≤3 is satisfied.

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