Pump body assembly, rotor compressor and air conditioner

Abstract

The utility model provides a pump body assembly, a rotor compressor and an air conditioner, the pump body assembly comprises an upper air cylinder, a partition plate and a lower air cylinder which are sequentially arranged from top to bottom, an upper cavity is formed in the upper air cylinder, and a rotatable upper roller is arranged in the upper cavity; a lower cavity is formed in the lower air cylinder, and a rotatable lower roller is arranged in the lower cavity; the total displacement of the pump body assembly is V, the inner diameters of the upper air cylinder and the lower air cylinder are Dc, the heights of the upper air cylinder and the lower air cylinder are Hc, the outer diameters of the upper roller and the lower roller are Dp, a certain relation exists among V, Dc, Hc and Dp, the total displacement of the pump body assembly and the heights of the air cylinders are within corresponding value ranges, vibration of the compressor is reduced, and the compressor is prevented from being started and stopped frequently. The displacement of the compressor is improved, the energy efficiency of the compressor is optimized, the application range of the compressor is expanded, and the problems that in the prior art, a single-cylinder rotor compressor is large in vibration and unstable in low-frequency operation, consequently, the compressor is started and stopped frequently, and a double-cylinder rotor compressor is small in displacement and poor in energy efficiency are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field especially relates to a pump body subassembly, rotor compressor and air conditioner. BACKGROUND

[0002] Rotor compressor is widely applied in air treatment equipment field because of its simple structure and low cost, the existing single cylinder rotor compressor is big, low frequency operation is unstable, leading to low frequency operation frequency is shielded and compressor start -stop frequently, the existing double cylinder rotor compressor displacement is small, and energy efficiency is poor, leading to application is limited. INVENTION CONTENTS

[0003] In view of this, the utility model provides a pump body subassembly, rotor compressor and air conditioner to solve the existing single cylinder rotor compressor is big, low frequency operation is unstable, leading to compressor start -stop frequently, and the existing double cylinder rotor compressor displacement is small, and energy efficiency is poor, leading to application is limited and so on.

[0004] The utility model provides a pump body subassembly for rotor compressor, the pump body subassembly includes two cylinders, each cylinder forms cavity, the cavity is provided with rotatable roller, the total displacement of pump body subassembly is V, the inner diameter of cylinder is D c , the height of cylinder is H c , the outer diameter of roller is D p , V, D c , H c And D p Satisfy:

[0005]

[0006] 7.8mm≤H c ≤12.2mm.

[0007] Further optionally, 9.6cc≤V≤10.5cc, 9.8mm≤H c ≤11.2mm.

[0008] Further optionally, D c And H c Satisfy:

[0009]

[0010] Further optionally, two cylinders are upper cylinder and lower cylinder respectively, the upper cylinder forms upper cavity and upper cylinder suction port communicated with upper cavity, the lower cylinder forms lower cavity and lower cylinder suction port communicated with lower cavity, and the upper cylinder and lower cylinder are equipped with partition plate between them.

[0011] The inner part of the partition plate is formed with a gas storage cavity, and the side wall of the partition plate is formed with a partition plate air suction hole, a partition plate upper air outlet hole and a partition plate lower air outlet hole which are communicated with the gas storage cavity; the partition plate upper air outlet hole, the upper air cylinder air suction hole and the upper cavity are communicated, and the partition plate lower air outlet hole, the lower air cylinder air suction hole and the lower cavity are communicated in sequence; the inner diameters of the partition plate air suction holes are D g , and the D g satisfy: 8mm≤D g ≤13mm.

[0012] The pump body assembly further comprises an upper flange and a lower flange, the upper flange is arranged on the side of the upper air cylinder away from the partition plate, and the lower flange is arranged on the side of the lower air cylinder away from the partition plate; the upper flange is formed with an upper flange air suction hole, the upper flange air suction hole, the upper air cylinder air suction hole and the upper cavity are communicated in sequence; the lower flange is formed with a lower flange air suction hole, the lower flange air suction hole, the lower air cylinder air suction hole and the lower cavity are communicated in sequence; the inner diameter of the upper flange air suction hole is D f1 , the inner diameter of the lower flange air suction hole is D f2 , and the D f1 s and D f2 s satisfy: 8mm≤D f1 ≤13mm and 8mm≤D f2 ≤13mm.

[0013] Further optionally, the two air cylinders are an upper air cylinder and a lower air cylinder, and the upper air cylinder and the lower air cylinder are provided with a partition plate therebetween; the distance between the upper end face of the upper air cylinder and the lower end face of the lower air cylinder is L, and the L satisfies:

[0014] 32mm≤L≤38mm.

[0015] Further optionally, the two air cylinders are an upper air cylinder and a lower air cylinder, the upper air cylinder is formed with an upper cavity, the lower air cylinder is formed with a lower cavity, and the upper air cylinder and the lower air cylinder are provided with a partition plate therebetween; the partition plate is formed with a partition plate shaft hole; the pump body assembly further comprises an upper flange, a lower flange and a crankshaft; the upper flange is arranged on the side of the upper air cylinder away from the partition plate, and the upper flange is formed with an upper flange shaft hole; the lower flange is arranged on the side of the lower air cylinder away from the partition plate, and the lower flange is formed with a lower flange shaft hole;

[0016] The crankshaft comprises a long shaft, an upper eccentric shaft, an intermediate shaft, a lower eccentric shaft and a short shaft which are arranged in sequence from top to bottom; the long shaft and the upper flange shaft hole are rotatably matched through a main bearing, and the short shaft and the lower flange shaft hole are rotatably matched through a secondary bearing; the upper eccentric shaft is rotatably arranged in the upper cavity, the lower eccentric shaft is rotatably arranged in the lower cavity, and the intermediate shaft is rotatably arranged in the partition plate shaft hole.

[0017] The height of the main bearing is H m , the height of the auxiliary bearing is H n , H m and H n satisfy:

[0018] 35mm≤H m ≤43mm, 14mm≤H n ≤22mm.

[0019] Further optionally, the inner diameter of the main bearing is D m , the inner diameter of the auxiliary bearing is D n , D m and D n satisfy:

[0020] 11.9mm≤D m ≤14.2mm, 9.8mm≤D n ≤12.2mm.

[0021] Further optionally, 12.5mm≤D m ≤13.2mm, 10.5mm≤D n ≤11.2mm.

[0022] Further optionally, the radial thickness of the roller is t, and t satisfies: 5mm≤t≤8mm.

[0023] The utility model also provides a rotor compressor, the rotor compressor includes the shell and above any one pump body subassembly described, the inner diameter of the shell is D s , D s satisfy: 87mm≤D s ≤115mm, the shell forms the installation cavity, and the installation cavity is provided with the pump body subassembly.

[0024] The utility model also provides a kind of air conditioner, and the air conditioner is new national standard air conditioner, and the air conditioner includes the rotor compressor described above.

[0025] Compared with prior art, the utility model has the beneficial effects mainly in:

[0026] The pump body subassembly of rotor compressor includes upper cylinder, baffle and lower cylinder, upper cylinder forms upper cavity, and upper cavity is provided with upper roller;Lower cylinder forms lower cavity, and lower cavity is provided with lower roller;There is a certain relationship between the total displacement of pump body subassembly, the inner diameter of cylinder, the height of cylinder and the outer diameter of roller, and the total displacement of pump body subassembly and the height of cylinder are in corresponding value range, reduce the vibration of compressor, guarantee the stability of low frequency operation, prevent compressor frequent start-stop;Increase the displacement of compressor, optimize the energy efficiency of compressor, expand the application range of compressor. Attached Figure Description

[0027] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0028] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0029] Figure 1 and Figure 2 A schematic diagram of the structure of an embodiment of the rotary compressor provided by this utility model;

[0030] Figure 3 A schematic diagram of an embodiment of the pump body assembly provided by this utility model, wherein the upper flange has an upper flange suction hole and the lower flange has a lower flange suction hole;

[0031] In the picture:

[0032] 11-Housing; 111-Mounting cavity; 12-Motor; 13-Upper cover; 14-Lower cover; 15-Base; 16-Gas-liquid separator; 17-Intake pipe; 18-Exhaust pipe;

[0033] 21-Upper flange; 211-Upper flange suction port; 212-Upper flange shaft hole; 22-Upper cylinder; 221-Upper cavity; 222-Upper cylinder suction port; 23-Partition plate; 231-Air storage cavity; 232-Partition plate shaft hole; 24-Lower cylinder; 241-Lower cavity; 242-Lower cylinder suction port; 25-Lower flange; 251-Lower flange suction port; 252-Lower flange shaft hole; 26-Upper roller; 27-Lower roller;

[0034] 31 - Long axis; 32 - Upper eccentric axis; 33 - Middle axis; 34 - Lower eccentric axis; 35 - Short axis. Detailed Implementation

[0035] The following embodiments of the present application are described in detail by specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the contents disclosed in the specification. Obviously, the described embodiments are only some of the embodiments of the present application, but not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. "Multiple" generally includes at least two, but does not exclude the case of including at least one.

[0037] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0038] It should be further pointed out that the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the goods or systems including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such goods or systems. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of another identical element in the goods or system including the element.

[0039] The existing single-cylinder rotary compressor has large vibration, unstable low-frequency operation, resulting in frequency shielding during low-frequency operation and frequent start-stop of the compressor; the existing double-cylinder rotary compressor has small displacement and poor energy efficiency, resulting in limited application;

[0040] The utility model creatively provides a kind of pump body assembly, for rotary compressor;Pump body assembly includes upper cylinder, baffle and lower cylinder, upper cylinder is formed with upper cavity, and upper cavity is provided with upper roller;Lower cylinder is formed with lower cavity, and lower cavity is provided with lower roller;There is a certain relationship between the total displacement of pump body assembly, the inner diameter of cylinder, the height of cylinder and the outer diameter of roller, and the total displacement of pump body assembly and the height of cylinder are in corresponding value range, reduce the vibration of compressor, guarantee the stability of low-frequency operation;Increase the displacement of compressor, optimize the energy efficiency of compressor.

[0041] Example 1

[0042] As Figure 1 and Figure 2 shown, the embodiment provides a pump body assembly for a rotary compressor; the pump body assembly comprises two cylinders, each of which is formed with a cavity in which a rotatable roller is arranged; the total displacement of the pump body assembly is V, the inner diameter of the cylinder is D c , the height of the cylinder is H c , the outer diameter of the roller is D p , V, D c , H c and D p satisfy:

[0043]

[0044] 7.8mm≤H c ≤12.2mm.

[0045] In particular, the two cylinders are an upper cylinder and a lower cylinder, and a partition plate is arranged between the upper cylinder and the lower cylinder; the pump body assembly further comprises an upper flange and a lower flange, and the upper flange 21, the upper cylinder 22, the partition plate 23, the lower cylinder 24 and the lower flange 25 are arranged in sequence from top to bottom; the upper cylinder 22 is formed with an upper cavity 221 and an upper chute in communication with the upper cavity 221, and the upper cavity 221 is arranged with a rotatable upper roller 26, and the upper chute is arranged with a slidable upper slide; one end of the upper slide abuts against the upper roller 26, and the other end of the upper slide and the side wall of the upper chute are arranged with an upper elastic member; when the upper roller 26 rotates, the upper slide can slide in the upper chute under the action of the upper roller 26 and the upper elastic member, and then the upper cavity 221 realizes gas suction and exhaust; the lower cylinder 24 is formed with a lower cavity 241 and a lower chute in communication with the lower cavity 241, and the lower cavity 241 is arranged with a rotatable lower roller 27, and the lower chute is arranged with a slidable lower slide; one end of the lower slide abuts against the lower roller 27, and the other end of the lower slide and the side wall of the lower chute are arranged with a lower elastic member; when the lower roller 27 rotates, the lower slide can slide in the lower chute under the action of the lower roller 27 and the lower elastic member, and then the lower cavity 241 realizes gas suction and exhaust.

[0046] The inner diameters of the upper cylinder 22 and the lower cylinder 24 are both D c , the heights of the upper cylinder 22 and the lower cylinder 24 are both H c , and the outer diameters of the upper roller 26 and the lower roller 27 are both D p .

[0047] Preferably, 9.6cc≤V≤10.5cc, 9.8mm≤H c ≤11.2mm;

[0048] H cThe larger the value of H, the greater the leakage between the outer circumference of the roller and the inner circumference of the corresponding cylinder, affecting the compressor's energy efficiency; however, if H... c If the value is too small, it will cause the compressor's eccentricity to be too large, resulting in increased leakage at the vane end face; therefore, H... c Limiting the leakage to between 7.8mm and 12.2mm ensures that both types of leakage are within a suitable range, thus achieving a high-efficiency design for the compressor.

[0049] D c and H c Factors affecting compressor energy efficiency are discussed below, specifically regarding D. c and H c The limitation further clarifies that D c and H c satisfy:

[0050]

[0051] D c The larger the value of D, the larger the heat transfer area of ​​the pump body components, which reduces the insulation efficiency and affects the compressor's energy efficiency; if D... c If the value is too small, it will lead to a reduction in the thickness of the rollers and an increase in leakage at the roller end face, which will also affect the energy efficiency of the compressor. Therefore, δ is limited to between 0.21 and 0.29 to ensure that the compressor achieves the best balance among various parameters and fully utilizes the compressor's energy efficiency.

[0052] The location and size of the suction port of the pump body assembly affect the suction resistance and the power consumption of the compressor. The following is a further explanation of the location and size of the suction port. The upper cylinder 22 has an upper cylinder suction port 222, and the lower cylinder 24 has a lower cylinder suction port 242.

[0053] The partition 23 has an internal air storage chamber 231. The side wall of the partition 23 has an air intake hole, an upper air outlet hole, and a lower air outlet hole that communicate with the air storage chamber 231. The upper air outlet hole, the upper cylinder intake port 222, and the upper cavity 221 are connected. The lower air outlet hole, the lower cylinder intake port 242, and the lower cavity 241 are connected in sequence. Gas can enter the air storage chamber 231 through the partition air intake hole. A part of the gas in the air storage chamber 231 enters the upper cavity 221 through the upper air outlet hole and the upper cylinder intake port 222. Another part of the gas in the air storage chamber 231 enters the lower cavity 241 through the lower air outlet hole and the lower cylinder intake port 242.

[0054] The inner diameter of the air intake hole in the partition is D. g D g satisfy:

[0055] 8mm≤D g ≤13mm;

[0056] With the decrease of H c , the suction hole size of the compressor is very limited, when the suction hole is designed small, the suction resistance increases, which affects the power consumption of the compressor, and when the suction hole is small to a certain extent, it even seriously affects the capacity of the compressor; at the same time, increasing the height of the upper flange 21, the lower flange 25 or the partition plate 23 has little effect on the energy efficiency of the compressor; therefore, by setting the suction hole on the partition plate 23, the size of the suction hole of the compressor can be ensured under the condition of lower H c .

[0057] The distance between the upper cylinder 22 and the lower cylinder 24 affects the reliability of the compressor, and the distance between the upper end face of the upper cylinder 22 and the lower end face of the lower cylinder 24 is L, which satisfies:

[0058] 32mm≤L≤38mm;

[0059] The larger L is, the greater the support length of the pump body assembly, which leads to poor reliability of the compressor, and the decrease of H c is beneficial to reduce the span of the compressor, but the partition plate 23 also needs to ensure a certain thickness, especially when the suction hole is arranged on the partition plate 23, the thickness of the partition plate 23 needs to be ensured to ensure the size of the suction hole of the compressor; therefore, L is limited to between 32mm and 38mm.

[0060] Compared with the original single-cylinder compressor, the small displacement double-cylinder compressor runs more smoothly, which can improve the reliability of the compressor, but increasing L is not conducive to the reliability of the compressor; therefore, the design of the main bearing and the auxiliary bearing is particularly critical, and the size of the main bearing and the auxiliary bearing is further explained as follows; the partition plate 23 is formed with a partition plate shaft hole 232; the upper flange 21 is formed with an upper flange shaft hole 212, and the lower flange 25 is formed with a lower flange shaft hole 252;

[0061] The pump body assembly further comprises a crankshaft, the crankshaft comprises a long shaft 31, an upper eccentric shaft 32, an intermediate shaft 33, a lower eccentric shaft 34 and a short shaft 35 arranged in sequence from top to bottom; the long shaft 31 and the upper flange shaft hole 212 are rotatably connected through the main bearing, and the short shaft 35 and the lower flange shaft hole 252 are rotatably connected through the auxiliary bearing; the upper eccentric shaft 32 is rotatably arranged in the upper cavity 221, and the upper eccentric shaft 32 is provided with an upper roller 26; the lower eccentric shaft 34 is rotatably arranged in the lower cavity 241, and the lower eccentric shaft 34 is provided with a lower roller 27; the intermediate shaft 33 is rotatably arranged in the partition plate shaft hole 232; when the crankshaft is controlled to rotate, the upper eccentric shaft 32 rotates with the upper roller 26 in the upper cavity 221, and then the upper cavity 221 realizes suction and exhaust, and the lower eccentric shaft 34 rotates with the lower roller 27 in the lower cavity 241, and then the lower cavity 241 realizes suction and exhaust;

[0062] The height of the main bearing is H m , the height of the secondary bearing is H n , H m and H n satisfy:

[0063] 35mm≤H m ≤43mm, 14mm≤H n ≤22mm;

[0064] If the height of the main bearing and the secondary bearing is too low, the radial force that can be borne is reduced, and the reliability of the compressor is reduced; if the height of the main bearing and the secondary bearing is too high, the friction pair area is increased, which increases the friction power consumption; therefore, the height of the main bearing is limited to between 35mm and 43mm, and the height of the secondary bearing is limited to between 14mm and 22mm.

[0065] Further, the inner diameter of the main bearing is D m , the inner diameter of the secondary bearing is D n , D m and D n satisfy:

[0066] 11.9mm≤D m ≤14.2mm, 9.8mm≤D n ≤12.2mm;

[0067] Preferably, 12.5mm≤D m ≤13.2mm, 10.5mm≤D n ≤11.2mm;

[0068] The larger the inner diameter of the main bearing is, the larger the radial pressure that can be borne is, but the larger the inner diameter of the main bearing is, the larger the linear velocity between the crankshaft and the main bearing is, and the increased viscous resistance of the oil film is; therefore, the inner diameter of the main bearing is limited to between 11.9mm and 14.2mm.

[0069] The radial thickness of the roller affects the energy efficiency of the compressor, and the radial thickness of the roller is further described below, the radial thickness of the roller is t, that is, the difference between the outer diameter and the inner diameter of the roller is the radial thickness of the roller; t satisfies: 5mm≤t≤8mm;

[0070] Preferably, the radial thickness of the upper roller 26 and the radial thickness of the lower roller 27 are both t;

[0071] When t is too small, it will cause the leakage of the end surface of the roller to increase, which affects the energy efficiency of the compressor; when t is too large, the weight of the roller increases, which will cause the mechanical friction to increase; when H c is between 7.8mm and 12.2mm, t is kept between 5mm and 8mm, and the energy efficiency of the compressor is relatively high;

[0072] Dc and H c are all related to t; under the condition of fixed displacement, the larger D c , the larger H c , the larger t.

[0073] The embodiment also provides a rotor compressor, which comprises a shell 11, a motor 12 and the pump body assembly according to any one of the above embodiments; the inner diameter of the shell 11 is D s , and D s satisfies 87mm≤D s ≤115mm; the shell 11 is formed with a mounting cavity 111, the motor 12 and the pump body assembly are arranged in the mounting cavity 111, and the motor 12 is located above the pump body assembly.

[0074] The motor 12 comprises a rotor and a stator, and the rotor is drivingly connected with the long shaft 31; the stator comprises a stator core and a stator winding, the stator core is arranged on the side wall of the mounting cavity 111, and the stator winding is wound on the stator core; the rotor is rotatably arranged in the mounting cavity 111; the stator winding is connected with alternating current, so that the rotor rotates.

[0075] The rotor compressor further comprises an upper cover 13 and a lower cover 14, the upper cover 13 is arranged at the axial upper end of the shell 11, the lower cover 14 is arranged at the axial lower end of the shell 11, and the upper cover 13, the shell 11 and the lower cover 14 surround to form the closed mounting cavity 111; the lower end of the shell 11 is provided with a base 15, and the rotor compressor is fixedly arranged through the base 15; the upper cover 13 is provided with an exhaust pipe 18, and the exhaust pipe 18 is communicated with the mounting cavity 111.

[0076] One side of the rotor compressor is provided with a gas-liquid separator 16, and the gas-liquid separator 16 is formed with a gas-liquid separator outlet; the partition plate suction hole and the gas-liquid separator outlet are communicated through a suction pipe 17.

[0077] When the upper cylinder 22 and the lower cylinder 24 suck gas, the gas in the gas-liquid separator 16 enters the gas storage cavity 231 through the suction pipe 17 and the partition plate suction hole; part of the gas in the gas storage cavity 231 enters the upper cavity 221 through the partition plate upper gas outlet hole and the upper cylinder suction port 222, and another part of the gas in the gas storage cavity 231 enters the lower cavity 241 through the partition plate lower gas outlet hole and the lower cylinder suction port 242; when the rotor rotates with the crankshaft, the upper eccentric shaft rotates with the upper roller, and the gas in the upper cavity 221 is discharged to the mounting cavity 111; the lower eccentric shaft rotates with the lower roller, and the gas in the lower cavity 241 is discharged to the mounting cavity 111; the gas in the mounting cavity 111 is discharged through the exhaust pipe 18.

[0078] The embodiment also provides an air conditioner, which comprises the rotor compressor according to the above embodiment.

[0079] The air conditioner is a new national standard air conditioner, that is, the air conditioner using the compressor executes GB21455 standard "Energy Efficiency Limiting Value and Energy Efficiency Grade of Room Air Conditioner" or the standard after the standard; after the implementation of the new national standard, the energy efficiency of the air conditioner is upgraded, and the evaporator and condenser of the air conditioner are also upgraded and improved, so that the actual operation condition and operation frequency of the compressor are greatly different from those of the old national standard; when H c When limited to 7.8mm to 12.2mm, the compressor efficiency can play a very big advantage.

[0080] Embodiment 2

[0081] Different from embodiment 1, as shown in Figure 3 , the upper flange 21 is formed with an upper flange suction hole 211, the upper flange suction hole 211, the upper cylinder suction port 222 and the upper cavity 221 are sequentially communicated; the gas can enter the upper cavity 221 through the upper flange suction hole 211 and the upper cylinder suction port 222; the lower flange 25 is formed with a lower flange suction hole 251, the lower flange suction hole 251, the lower cylinder suction port 242 and the lower cavity 241 are sequentially communicated; the gas can enter the lower cavity 241 through the lower flange suction hole 251 and the lower cylinder suction port 242;

[0082] The inner diameter of the upper flange suction hole 211 is D f1 , the inner diameter of the lower flange suction hole 251 is D f2 , D f1 and D f2 satisfy:

[0083] 8mm≤D f1 ≤13mm, 8mm≤D f2 ≤13mm;

[0084] With the decrease of H c , the size of the suction hole of the compressor is very limited, when the suction hole is designed to be small, the suction resistance increases, which affects the power consumption of the compressor, and when the suction hole is small to a certain extent, it even seriously affects the capacity of the compressor; at the same time, increasing the height of the upper flange 21, the lower flange 25 or the partition plate 23 has little effect on the energy efficiency of the compressor; therefore, by setting the suction hole on the upper flange 21 and the lower flange 25, the size of the suction hole of the compressor can be ensured under the condition of low H c .

[0085] The above specifically shows and describes the exemplary embodiments of the present disclosure. It should be understood that the present disclosure is not limited to the detailed structure, arrangement or implementation method described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent arrangements within the spirit and scope of the appended claims.

Claims

1. A pump body assembly for a rotary compressor; characterized by, The pump body assembly comprises two cylinders, each of which is formed with a cavity in which a rotatable roller is arranged; the total displacement of the pump body assembly is V, the inner diameter of the cylinder is D c , the height of the cylinder is H c , the outer diameter of the roller is D p , and the V, D c , H c and D p satisfy: ， 7.8 mm < H c ≤ 12.2 mm.

2. The pump body assembly of claim 1, wherein, 9.6 < V < 10.5 cc, 9.8 mm < H c ≤ 11.2 mm.

3. The pump body assembly of claim 1, wherein, The D c and H c satisfies: 。 4. The pump body assembly of claim 1, wherein The two cylinders are an upper cylinder and a lower cylinder, the upper cylinder is formed with an upper cavity and an upper cylinder suction port in communication with the upper cavity, the lower cylinder is formed with a lower cavity and a lower cylinder suction port in communication with the lower cavity, and a partition plate is arranged between the upper cylinder and the lower cylinder. The inside of the partition plate is formed with a gas storage cavity, and the side wall of the partition plate is formed with a partition plate air suction hole, a partition plate upper air outlet hole and a partition plate lower air outlet hole which are communicated with the gas storage cavity; the partition plate upper air outlet hole, the upper air cylinder air suction hole and the upper cavity are communicated, and the partition plate lower air outlet hole, the lower air cylinder air suction hole and the lower cavity are communicated in sequence; the inner diameter of the partition plate air suction hole is D g , and the D g satisfies: 8mm≤D g ≤13mm; or, The pump body assembly further comprises an upper flange and a lower flange, the upper flange is arranged on the side of the upper cylinder away from the partition plate, and the lower flange is arranged on the side of the lower cylinder away from the partition plate; the upper flange is formed with an upper flange air suction hole, the upper flange air suction hole, the upper cylinder air suction port and the upper cavity are sequentially communicated; the lower flange is formed with a lower flange air suction hole, the lower flange air suction hole, the lower cylinder air suction port and the lower cavity are sequentially communicated; the inner diameter of the upper flange air suction hole is D f1 , the inner diameter of the lower flange air suction hole is D f2 , and D f1 and D f2 satisfy: 8mm≤D f1 ≤13mm, 8mm≤D f2 ≤13mm.

5. The pump body assembly of claim 1, wherein, The two cylinders are an upper cylinder and a lower cylinder, and a partition plate is arranged between the upper cylinder and the lower cylinder, the distance between the upper end surface of the upper cylinder and the lower end surface of the lower cylinder is L, and the L satisfies: 32mm≤L≤38mm.

6. The pump body assembly of claim 1, wherein, The two cylinders are an upper cylinder and a lower cylinder, the upper cylinder is formed with an upper cavity, the lower cylinder is formed with a lower cavity, and a partition plate is arranged between the upper cylinder and the lower cylinder, the partition plate is formed with a partition plate shaft hole, the pump body assembly further comprises an upper flange, a lower flange and a crankshaft, the upper flange is arranged on the side of the upper cylinder away from the partition plate, the upper flange is formed with an upper flange shaft hole, the lower flange is arranged on the side of the lower cylinder away from the partition plate, and the lower flange is formed with a lower flange shaft hole. The crankshaft comprises a long shaft, an upper eccentric shaft, an intermediate shaft, a lower eccentric shaft and a short shaft arranged in sequence from top to bottom, the long shaft and the upper flange shaft hole are rotatably connected through a main bearing, the short shaft and the lower flange shaft hole are rotatably connected through a secondary bearing, the upper eccentric shaft is rotatably arranged in the upper cavity, the lower eccentric shaft is rotatably arranged in the lower cavity, and the intermediate shaft is rotatably arranged in the partition plate shaft hole. The height of the main bearing is H m , the height of the sub-bearing is H n , H m and H n satisfy: 35 mm < H m ≤ 43 mm, 14 mm < H n ≤ 22 mm.

7. The pump body assembly of claim 6, wherein, The inner diameter of the main bearing is D m The inner diameter of the secondary bearing is D n D m and D n satisfy: 11.9 mm < D m ≤ 14.2 mm, 9.8 mm < D n ≤ 12.2 mm.

8. The pump body assembly of claim 7, wherein, 12.5 mm < D m ≤ 13.2 mm, 10.5 mm < D n ≤ 11.2 mm.

9. The pump body assembly of claim 1, wherein, The radial thickness of the roller is t, and the t satisfies: 5mm≤t≤8mm.

10. A rotary compressor characterized by comprising: The rotor compressor comprises a shell and the pump body assembly according to any one of claims 1 to 9; an inner diameter of the shell is D s , and the D s satisfies: 87mm≤D s ≤115mm; the shell is formed with a mounting cavity, and the pump body assembly is arranged in the mounting cavity.

11. An air conditioner characterized by comprising: The air conditioner is a new national standard air conditioner, and the air conditioner comprises the rotor compressor of claim 10.

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