Pump body assembly, rotary compressor and refrigeration device

Abstract

The utility model provides a kind of pump body assembly, rotary compressor and refrigeration equipment, it is related to compressor field.Pump body assembly includes cylinder body structure and sleeve, cylinder body structure includes cylinder body, cylinder body is provided with suction passage extending along first direction, one end of suction passage is communicated suction chamber inside cylinder body, other end is communicated outside of cylinder body;Sleeve is sleeved in suction passage, and sleeve is provided with communication hole;Wherein, at least one buffer groove is provided on the inner wall of suction passage, and buffer groove is communicated with the inside of sleeve by communication hole.The utility model is provided with buffer groove on the inner wall of suction passage, and the structure design of the inside of sleeve is communicated by sleeve communication hole, reduces the risk of easy leakage of traditional buffer groove.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, and in particular relates to a pump body assembly, a rotary compressor, and a refrigeration device. Background Technology

[0002] In the design of pump body components, in order to optimize the fluid stability of the intake process and mitigate the impact of pressure shock on the structure, a buffer groove is usually opened on the inner wall of the intake channel of the cylinder. The buffer groove achieves a balanced distribution of fluid pressure, reduces the damage of airflow pulsation or liquid flow impact to the sleeve and inner wall of the channel, and thus improves the smoothness of pump operation.

[0003] However, the existing buffer tanks, due to the lack of reasonable flow guidance and connection structures, have become new potential leakage hazards, increasing the risk of leakage. Utility Model Content

[0004] In view of this, the present invention provides a pump body assembly, a rotary compressor, and a refrigeration device, which aim to reduce the risk of leakage of the buffer tank.

[0005] The technical solution of this utility model is implemented as follows: This utility model embodiment provides a pump body assembly, which includes a cylinder structure and a sleeve. The cylinder structure includes a cylinder body, which is provided with an air intake channel extending in a first direction. One end of the air intake channel is connected to the air intake chamber inside the cylinder body, and the other end is connected to the outside of the cylinder body. The sleeve is sleeved inside the air intake channel, and the sleeve has a connecting hole. At least one buffer groove is provided on the inner wall of the air intake channel, and the buffer groove is connected to the inner side of the sleeve through the connecting hole.

[0006] In one embodiment, the width of the buffer groove is greater than the width of the connecting hole; and / or, the width of the buffer groove is greater than the depth of the buffer groove.

[0007] In one embodiment, the connecting hole extends through the sidewall of the sleeve along the depth direction of the buffer groove.

[0008] In one embodiment, the buffer groove is arranged in a ring shape.

[0009] In one embodiment, multiple connecting holes are provided and are spaced apart along the circumference of the sleeve.

[0010] In one embodiment, the air intake channel includes a proximal section close to the air intake chamber and a distal section away from the air intake chamber, wherein the cross-sectional area of ​​the proximal section is smaller than the cross-sectional area of ​​the distal section; wherein the buffer groove is disposed on the inner wall of the distal section.

[0011] In one embodiment, the sleeve includes an interlocking section and an extension section that communicate with each other, wherein the outer diameter of the interlocking section is smaller than the outer diameter of the extension section; wherein the interlocking section is sleeved on the distal cavity section, and the extension section extends outward from the cylinder body along the first direction.

[0012] In one embodiment, the cylinder structure further includes a first bearing and a second bearing disposed at opposite ends of the cylinder body in a second direction, the second direction being perpendicular to the first direction; wherein, in the first direction, the distal cavity section of the intake channel protrudes beyond the first bearing and the second bearing.

[0013] This utility model also provides a rotary compressor, which includes a motor and a pump assembly. The motor includes a rotor and a stator. The pump assembly includes a cylinder structure, a sleeve, a crankshaft, rollers, and vanes. The cylinder structure includes a cylinder body, which has a suction channel extending in a first direction. One end of the suction channel connects to the suction chamber inside the cylinder body, and the other end connects to the outside of the cylinder body. The sleeve is fitted inside the suction channel, and the sleeve has a connecting hole. At least one buffer groove is provided on the inner wall of the intake passage, and the buffer groove is connected to the inner side of the sleeve through the connecting hole; the roller is sleeved on the eccentric part of the crankshaft, and the roller and the sliding vane are respectively disposed on the inner side of the cylinder body. The sliding vane divides the cavity between the inner side wall of the cylinder body and the outer side wall of the roller into the intake chamber and the exhaust chamber; the crankshaft of the pump assembly is drivenly connected to the rotor to reciprocate along the inner wall of the cylinder body, thereby changing the volume of the intake chamber and the exhaust chamber.

[0014] This utility model also provides a refrigeration device, which includes a rotary compressor. The rotary compressor includes a motor and a pump assembly. The motor includes a rotor and a stator. The pump assembly includes a cylinder structure, a sleeve, a crankshaft, rollers, and vanes. The cylinder structure includes a cylinder body, which has an intake channel extending in a first direction. One end of the intake channel connects to the intake chamber inside the cylinder body, and the other end connects to the outside of the cylinder body. The sleeve is fitted inside the intake channel, and the sleeve has a connecting... A through hole is provided; wherein, at least one buffer groove is provided on the inner wall of the intake channel, and the buffer groove is connected to the inner side of the sleeve through the connecting hole; the roller is sleeved on the eccentric part of the crankshaft, and the roller and the sliding vane are respectively disposed on the inner side of the cylinder body, and the sliding vane divides the cavity between the inner side wall of the cylinder body and the outer side wall of the roller into the intake chamber and the exhaust chamber; the crankshaft of the pump body assembly is drivenly connected to the rotor to reciprocate along the inner wall of the cylinder body, thereby changing the volume of the intake chamber and the exhaust chamber.

[0015] This invention reduces the risk of leakage associated with traditional buffer grooves by incorporating a buffer groove on the inner wall of the intake channel and connecting it to the inner side of the sleeve via a connecting hole. On one hand, the buffer groove can create pressure interaction with the main channel inside the sleeve through the connecting hole. When fluid flows through the main channel, some fluid can enter the buffer groove to absorb and buffer pressure fluctuations, thereby reducing the impact of fluid pulsation on the sleeve and the inner wall of the intake channel, and improving the smoothness and stability of pump operation. On the other hand, the sleeve confines the buffer groove within the closed space between the inner wall of the intake channel and the outer wall of the sleeve, allowing the buffer groove to connect to the main channel through the connecting hole. This prevents the buffer groove from directly contacting the external environment of the pump body, fundamentally cutting off the path of leakage from the buffer groove to the outside, significantly reducing the risk of leakage, and thus improving the overall sealing performance and operational reliability of the pump assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A vertical sectional view of the pump body assembly provided by this utility model; Figure 2 A schematic diagram showing the sleeve and cylinder body fitted together according to this utility model; Figure 3 for Figure 2 Enlarged view of point C in the middle; Figure 4 A cross-sectional view of the pump body assembly provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 100. Pump body assembly; 1. Cylinder block structure; 11. Cylinder body; 111. Intake passage; 1111. Buffer groove; 111A. Near cavity section; 111B. Far cavity section; 12. First bearing; 13. Second bearing; 2. Intake chamber; 3. Exhaust chamber; 4. Sleeve; 40. Main passage; 41. Connecting hole; 4A. Insertion section; 4B. Extension section; 5. Crankshaft; 6. Roller; 7. Sliding vane. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In the design of pump body components, to optimize fluid stability during the suction process and mitigate the impact of pressure shocks on the structure, buffer grooves are typically created on the inner wall of the suction channel of the cylinder. These buffer grooves achieve a balanced distribution of fluid pressure, reducing damage to the sleeve and inner wall of the channel caused by airflow pulsation or liquid flow impact, thereby improving the smoothness of pump operation. However, existing buffer grooves, lacking reasonable flow guidance and connection structures, become new potential leakage hazards themselves, increasing the risk of leakage. Therefore, this utility model embodiment provides a pump body component designed to reduce the leakage risk of the buffer groove.

[0023] The pump body assembly can be a component of a rotary compressor, or it can be a component of other types of compressors (such as scroll compressors, reciprocating compressors, etc.) or pump equipment (such as hydraulic pumps, pneumatic pumps, etc.).

[0024] Please see Figure 1 and Figure 4The pump assembly 100 includes a cylinder structure 1. The cylinder structure 1 includes a cylinder body 11, and the inner side of the cylinder body 11 has a variable volume intake chamber 2 and an exhaust chamber 3. An intake passage 111 is disposed inside the cylinder body 11, while the exhaust passage can be disposed at any position in the cylinder structure 1, as long as it does not interfere with the intake chamber 2 and the intake passage 111, and can discharge the fluid in the exhaust chamber 3.

[0025] The intake channel 111 is disposed inside the cylinder body 11 along a first direction (the first direction is indicated by the dashed line a in the figure). One end of the channel is connected to the intake chamber 2 inside the cylinder body 11, and the other end extends to the outside of the cylinder body 11 to introduce external fluid into the intake chamber 2.

[0026] To better introduce external fluid into the suction chamber 2, the pump assembly 100 also includes a sleeve 4. One end of the sleeve 4 is fitted inside the suction channel 111, and the inner side of the sleeve 4 forms a main channel 40 for fluid flow. The other end can be connected to an external fluid delivery pipeline to guide the external fluid to enter the suction channel 111 stably.

[0027] Please combine Figure 2 The inner wall of the suction channel 111 is provided with at least one buffer groove 1111, and a connecting hole 41 is provided on the sleeve 4. The buffer groove 1111 is connected to the inner side of the sleeve 4 through the connecting hole 41. This arrangement allows some fluid to enter the buffer groove 1111 through the connecting hole 41 when the fluid flows through the main channel 40 inside the sleeve 4. The cavity of the buffer groove 1111 absorbs and buffers the pressure fluctuations of the fluid, effectively reducing the pulsating impact of the airflow or liquid flow, and preventing the sleeve 4 and the inner wall of the suction channel 111 from being directly subjected to high-frequency impacts, thus avoiding wear or vibration noise.

[0028] The principle of the buffer tank 1111 in absorbing and buffering fluid pressure fluctuations is as follows: When the fluid flows at high speed in the main channel 40 inside the sleeve 4, pressure fluctuations and pulsations are inevitable. When these pulsating fluids flow through the connecting hole 41, some of the energy drives some of the fluid to enter the buffer tank 1111 through the connecting hole 41. Since the buffer tank 1111 has a certain volume, a relatively stable pressure region can be formed inside it. When the fluid pressure in the main channel 40 increases, the excess fluid is "squeezed" into the buffer tank 1111, and the pressure in the buffer tank 1111 rises accordingly, thereby absorbing the pressure peak in the main channel 40; when the fluid pressure in the main channel 40 decreases, the high-pressure fluid stored in the buffer tank 1111 flows back to the main channel 40 through the connecting hole 41, replenishing the pressure in the main channel 40, thereby suppressing the pressure trough in the main channel 40. Through this dynamic "energy absorption-energy release" process, the buffer tank 1111 can smooth out the pressure pulsation of the fluid in the main channel 40, making the fluid entering the intake chamber 2 more stable, reducing fatigue damage to components such as the cylinder body 11 and sleeve 4 caused by drastic pressure fluctuations, and also reducing vibration and noise caused by fluid impact.

[0029] Furthermore, since the buffer groove 1111 is only connected to the inside of the sleeve 4 through the connecting hole 41 and is not connected to the external environment of the cylinder body 11, this structurally avoids the problem of fluid leakage from the buffer groove 1111 to the outside of the cylinder body 11 that may occur in traditional designs. Specifically, a radial sealing mating surface is formed between the sleeve 4 and the inner wall of the intake channel 111 (the seal can be further strengthened by interference fit, sealing ring, etc.). The buffer groove 1111 is enclosed between the outer periphery of the sleeve 4 and the inner wall of the intake channel 111. The fluid inside it exchanges with the main channel 40 inside the sleeve 4 through the connecting hole 41, and it is difficult to bypass the sleeve 4 and leak to the outside of the cylinder body 11, thereby significantly reducing the leakage risk caused by the buffer groove 1111 itself.

[0030] In summary, the pump assembly 100 provided in this embodiment of the present invention includes a cylinder structure 1 and a sleeve 4. The cylinder structure 1 includes a cylinder body 11, which is provided with an air intake channel 111 extending in a first direction. One end of the air intake channel 111 is connected to the air intake chamber 2 inside the cylinder body 11, and the other end is connected to the outside of the cylinder body 11. The sleeve 4 is sleeved inside the air intake channel 111, and the sleeve 4 has a connecting hole 41. At least one buffer groove 1111 is provided on the inner wall of the air intake channel 111, and the buffer groove 1111 is connected to the inner side of the sleeve 4 through the connecting hole 41.

[0031] This utility model embodiment reduces the risk of leakage of the traditional buffer groove 1111 by setting a buffer groove 1111 on the inner wall of the air intake channel 111 and communicating with the inner side of the sleeve 4 through the connecting hole 41 on the sleeve 4. On the one hand, the buffer groove 1111 can form a pressure interaction with the main channel 40 inside the sleeve 4 through the connecting hole 41. When the fluid flows through the main channel 40, some of the fluid can enter the buffer groove 1111 to absorb and buffer the pressure fluctuations, thereby weakening the impact of fluid pulsation on the sleeve 4 and the inner wall of the suction channel 111, and improving the smoothness and stability of the pump body operation. On the other hand, the sleeve 4 confines the buffer groove 1111 in the closed space between the inner wall of the suction channel 111 and the outer wall of the sleeve 4, so that the buffer groove 1111 is connected to the main channel 40 through the connecting hole 41, avoiding the buffer groove 1111 from directly contacting the external environment of the cylinder body 11, fundamentally cutting off the path of leakage from the buffer groove 1111 to the outside, significantly reducing the risk of leakage, and thus improving the overall sealing performance and operational reliability of the pump body assembly 100.

[0032] In some embodiments, please refer to Figure 2 and Figure 3 The width of the buffer groove 1111 is greater than the width of the connecting hole 41; and / or, the width of the buffer groove 1111 is greater than the depth of the buffer groove 1111. The width of the buffer groove 1111 refers to the width of the buffer groove 1111 in the first direction, denoted by L1 in the figure; the width of the connecting hole 41 refers to the width of the connecting hole 41 in the first direction, denoted by L2 in the figure; the depth of the buffer groove 1111 refers to the distance from the opening of the buffer groove 1111 to the bottom wall of the buffer groove 1111 in the radial direction of the suction channel 111, denoted by L3 in the figure.

[0033] When the width of the buffer groove 1111 is greater than the width of the connecting hole 41, the connecting hole 41 forms a structure similar to a "flow restrictor" in the width direction of the buffer groove 1111. This allows the fluid to flow more smoothly into and out of the buffer groove 1111, preventing excessively drastic fluid exchange between the fluid in the buffer groove 1111 and the fluid in the main channel 40 due to an excessively wide connecting hole 41, which would affect the buffering effect. Simultaneously, a wider buffer groove 1111 provides a larger cavity space, enhancing the absorption capacity for pressure fluctuations. When the width of the buffer groove 1111 is greater than its depth, it ensures that the buffer groove 1111 has sufficient buffering volume, preventing the structural strength of the cylinder body 11 at the intake channel 111 from being weakened by excessive depth. This ensures that the cylinder body 11 can withstand the pressure load during the intake process, extending the service life of the pump assembly 100. For example, if the width of the buffer groove 1111 is set to 5 mm, the width of the connecting hole 41 can be set to 2 mm, and the depth of the buffer groove 1111 can be set to 3 mm. Such a size ratio can effectively play the buffering role, while also taking into account structural strength and sealing performance.

[0034] In some embodiments, please continue reading Figure 2 and Figure 3 The connecting hole 41 penetrates the side wall of the sleeve 4 along the depth direction of the buffer groove 1111.

[0035] This configuration allows for a smooth fluid flow path between the connecting hole 41 and the buffer groove 1111, reducing the risk of increased local flow resistance or dead volume caused by the misalignment of the opening direction of the connecting hole 41 with the depth direction of the buffer groove 1111. Specifically, when the connecting hole 41 penetrates the side wall of the sleeve 4 along the depth direction of the buffer groove 1111, the centerline of the connecting hole 41 is parallel to or coincides with the depth direction of the buffer groove 1111. During the process of fluid entering the buffer groove 1111 from the main channel 40 inside the sleeve 4, or flowing back from the buffer groove 1111 to the main channel 40, the change in flow direction is minimal, and the flow resistance is correspondingly reduced. This improves the response speed and buffering efficiency of the buffer groove 1111 to pressure pulsations. For example, if the depth direction of the buffer groove 1111 is perpendicular to the inner wall surface of the air intake channel 111 (i.e., along the radial direction of the air intake channel 111), then the connecting hole 41 is also opened along the radial direction of the air intake channel 111 and penetrates the side wall of the sleeve 4, so that the fluid can directly enter and exit the buffer groove 1111 in the radial direction, reducing the energy loss and eddies caused by the bend in the flow path and improving the stability of the buffering effect.

[0036] In some embodiments, please refer to Figure 1 The buffer groove 1111 is arranged in a ring.

[0037] The annular buffer groove 1111 can buffer the fluid pressure in a comprehensive and uniform manner along the circumference of the suction channel 111. When the fluid flows in the main channel 40 inside the sleeve 4, its pressure pulsation may vary at different circumferential positions. The annular buffer groove 1111 can be connected to the main channel 40 through multiple connecting holes 41 (distributed circumferentially) on the sleeve 4, so that the fluid at all circumferential positions can enter the buffer groove 1111, thereby reducing the risk of uneven buffering due to excessively high or low local pressure. For example, a continuous annular buffer groove 1111 is opened on the inner wall of the suction channel 111, and four connecting holes 41 are opened on the sleeve 4, which are evenly distributed circumferentially. Each connecting hole 41 is connected to the annular buffer groove 1111. In this way, no matter where the fluid in the main channel 40 experiences pressure fluctuations in the circumferential direction, it can quickly enter the annular buffer groove 1111 through the nearest connecting hole 41, achieving uniform circumferential pressure absorption and release, and further improving the smoothness of pump operation. In addition, the annular buffer groove 1111 is easy to turn during machining, reducing machining costs.

[0038] Furthermore, multiple connecting holes 41 are spaced apart along the circumference of the sleeve, forming multi-point communication with the annular buffer groove 1111. This allows fluid to smoothly enter and exit the buffer groove 1111 at different circumferential positions, preventing a decrease in buffering effect due to blockage or insufficient flow capacity of a single connecting hole 41. Moreover, this multi-point communication structure design reduces the generation of local eddies compared to a single connecting hole 41.

[0039] In some embodiments, please refer to Figure 1 and Figure 2 To facilitate the processing of the buffer groove 1111, the buffer groove 1111 is disposed on the inner wall of the distal cavity section 111B of the air intake channel 111; wherein, the air intake channel 111 includes a proximal cavity section 111A close to the air intake chamber 2 and a distal cavity section 111B far from the air intake chamber 2, and the cross-sectional area of ​​the proximal cavity section 111A is smaller than the cross-sectional area of ​​the distal cavity section 111B.

[0040] When machining the buffer groove 1111, the cutting tool can directly extend into the intake channel 111 from the outside of the cylinder body 11 along the first direction. In contrast, if the buffer groove 1111 is located in the near cavity section 111A with a smaller cross-sectional area, the cutting tool must first extend into the inner cavity of the cylinder body 11 and then turn to extend into the intake channel 111. This machining method not only makes it difficult for the cutting tool to extend, but may also reduce the machining accuracy of the buffer groove 1111 due to interference from the inner wall of the cavity, thereby affecting its alignment with the connecting hole 41. In this embodiment, the buffer groove 1111 is located on the inner wall of the far cavity section 111B, which is close to the outside of the cylinder body 11. The cutting tool can directly enter the far cavity section 111B from the intake channel 111 port on the outside of the cylinder body 11 and feed stably along the first direction or a preset angle, thereby successfully machining the buffer groove 1111.

[0041] In some embodiments, please continue reading Figure 1 and Figure 2 In order to improve the sealing reliability between the sleeve 4 and the intake channel 111, the insertion section 4A of the sleeve 4 is sleeved on the distal cavity section 111B; wherein, the sleeve 4 includes the insertion section 4A and the extension section 4B that are interconnected, the outer diameter of the insertion section 4A is smaller than the outer diameter of the extension section 4B; the extension section 4B extends outward along the first direction towards the cylinder body 11.

[0042] The outer peripheral wall of the insertion section 4A is tightly fitted to the inner wall of the distal cavity section 111B, achieving radial sealing through interference fit or sealing rings (such as O-rings, lip seals, etc.). The outer diameter of the extension section 4B is larger than that of the insertion section 4A, so that when the insertion section 4A of the sleeve 4 is fully inserted into the distal cavity section 111B, the end of the extension section 4B can abut against the outer wall of the cylinder body 11, forming an axial limit and preventing the sleeve 4 from moving excessively towards the intake chamber 2 under fluid pressure.

[0043] In some embodiments, please refer to Figure 1 , Figure 2 and Figure 3 In order to optimize the assembly space of the sleeve 4 and improve the structural stress balance of the cylinder body 11, the cylinder body structure 1 also includes a first bearing 12 and a second bearing 13 respectively disposed at opposite ends of the cylinder body 11 in a second direction. The second direction is perpendicular to the first direction and is represented by the dashed line b in the figure. In the first direction, the distal cavity section 111B of the intake channel 111 protrudes from the first bearing 12 and the second bearing 13.

[0044] Since the distal cavity section 111B protrudes beyond the bearing, the main sealing areas of the buffer groove 1111 and the sleeve 4 can be positioned far from the bearing support structure. This reduces the impact of bearing assembly stress or vibration during operation on the sealing performance between the buffer groove 1111 and the sleeve 4. As a result, when the cylinder body 11 is under stress, its structural stress is mainly concentrated in the bearing support area, while the distal cavity section 111B of the intake channel 111 and the connection structure of the buffer groove 1111 and the sleeve 4 are in a relatively independent stress environment, thereby improving the stress balance and operational stability of the overall structure.

[0045] This utility model embodiment also provides a rotary compressor.

[0046] Please see Figure 1 and Figure 4 The rotary compressor includes a motor and a pump assembly 100 as described in any of the above embodiments. The pump assembly 100 also includes a crankshaft 5, a vane 7, and rollers 6. One end of the crankshaft 5 is connected to the output shaft of the motor, and the other end passes through the central hole of the cylinder body 11 and is eccentrically fitted with the rollers 6. Driven by the crankshaft 5, the rollers 6 roll along the inner wall of the cylinder body 11, thereby causing periodic changes in the volume of the intake chamber 2 and the exhaust chamber 3. The vane 7 is disposed in a vane 7 groove in the cylinder body 11, with one end always abutting against the outer peripheral wall of the rollers 6 to separate the intake chamber 2 and the exhaust chamber 3, ensuring the independence of the intake and exhaust processes. When the motor drives the crankshaft 5 to rotate, the roller 6 rotates eccentrically with the crankshaft 5, and the volume of the intake chamber 2 gradually increases, forming a negative pressure. External fluid is drawn into the intake chamber 2 through the main channel 40 of the sleeve 4 and the intake channel 111. Subsequently, as the roller 6 continues to rotate, the volume of the intake chamber 2 gradually decreases, and the fluid is compressed. When the pressure reaches the exhaust pressure, the volume of the exhaust chamber 3 increases, and the compressed fluid is discharged from the cylinder body 11 through the exhaust channel, thus completing a complete intake-compression-exhaust cycle. Because this rotary compressor uses the aforementioned pump assembly 100, it also has the advantages of reducing the risk of leakage in the buffer tank 1111, enhancing operational stability and reliability, and thus improving the efficiency and extending the service life of the rotary compressor.

[0047] This utility model embodiment also provides a refrigeration device.

[0048] Please continue reading. Figure 1 and Figure 4 The refrigeration equipment includes the aforementioned rotary compressor, as well as components such as a condenser, throttling device, and evaporator connected to the rotary compressor, which together constitute a refrigeration cycle system. As the core power component of the refrigeration equipment, the performance of the rotary compressor directly affects the refrigeration efficiency, operating noise, and reliability of the equipment. By adopting the rotary compressor provided in this embodiment, the risk of leakage in the pump assembly 100 is reduced, resulting in more stable operation. This allows the refrigeration equipment to maintain high refrigeration performance during long-term use, reducing the problem of decreased cooling capacity or increased energy consumption due to leakage, while also reducing operating noise and improving the user experience. This refrigeration equipment can be used for air conditioners, refrigerators, freezers, heat pump water heaters, and other devices that require cooling or heating via a compressor.

[0049] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A pump body assembly, characterized in that, include: A cylinder structure includes a cylinder body, the cylinder body having an intake channel extending along a first direction, one end of the intake channel connecting to an intake chamber inside the cylinder body, and the other end connecting to an outside of the cylinder body; and, A sleeve is fitted inside the air intake channel, and the sleeve has a connecting hole; The air intake channel has at least one buffer groove on its inner wall, and the buffer groove is connected to the inner side of the sleeve through the connecting hole.

2. The pump body assembly according to claim 1, characterized in that, The width of the buffer groove is greater than the width of the connecting hole; and / or, The width of the buffer groove is greater than the depth of the buffer groove.

3. The pump body assembly according to claim 1, characterized in that, The connecting hole extends through the side wall of the sleeve along the depth direction of the buffer groove.

4. The pump body assembly according to any one of claims 1 to 3, characterized in that, The buffer groove is arranged in a ring.

5. The pump body assembly according to claim 4, characterized in that, The connecting holes are provided in multiple locations and are distributed at intervals along the circumference of the sleeve.

6. The pump body assembly according to claim 1, characterized in that, The air intake channel includes a proximal cavity section close to the air intake chamber and a distal cavity section away from the air intake chamber, wherein the cross-sectional area of ​​the proximal cavity section is smaller than the cross-sectional area of ​​the distal cavity section. The buffer groove is disposed on the inner wall of the distal cavity section.

7. The pump body assembly according to claim 6, characterized in that, The sleeve includes an interlocking section and an extension section that are interconnected, wherein the outer diameter of the interlocking section is smaller than the outer diameter of the extension section; The insertion section is sleeved on the distal cavity section, and the extension section extends outward from the cylinder body along the first direction.

8. The pump body assembly according to claim 6, characterized in that, The cylinder structure also includes a first bearing and a second bearing disposed at opposite ends of the cylinder body in a second direction, the second direction being perpendicular to the first direction; In the first direction, the distal cavity of the intake channel protrudes beyond the first bearing and the second bearing.

9. A rotary compressor, characterized in that, include: An electric motor, including a rotor and a stator; and, The pump body assembly according to any one of claims 1 to 8, further comprising a crankshaft, rollers, and vanes, wherein the rollers are sleeved on the eccentric portion of the crankshaft, and the rollers and the vanes are respectively disposed on the inner side of the cylinder body, and the vanes divide the cavity between the inner wall of the cylinder body and the outer wall of the rollers into the intake chamber and the exhaust chamber; the crankshaft of the pump body assembly is drivenly connected to the rotor to reciprocate along the inner wall of the cylinder body, thereby changing the volume of the intake chamber and the exhaust chamber.

10. A refrigeration device, characterized in that, Including the rotary compressor as described in claim 9.

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