A kind of impellerless pump compressor
By using an impellerless pump structure and a differential pressure oil return system, the high cost and maintenance difficulties of impeller pump mechanisms are solved, achieving stable oil return and flexible layout, thus improving the efficiency and reliability of the vehicle refrigerator compressor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU ZHONGCHENG NEW ENERGY TECH CO LTD
- Filing Date
- 2025-06-16
- Publication Date
- 2026-07-14
AI Technical Summary
In existing vehicle refrigerator compressors, the impeller pump mechanism is costly, easily damaged, and difficult to maintain, making it difficult to meet diverse layout requirements, and the oil and refrigerant mixture is difficult to separate.
It adopts an impellerless pump structure, uses pressure difference to guide the oil in the separation mechanism into the return oil line, and achieves stable oil return through a flow controller. The motor is installed on the top outside of the cylinder block, eliminating the top impeller pump structure.
It achieves stable oil return lubrication, offers flexible and diverse layout options, reduces costs and simplifies maintenance, and improves the overall efficiency and reliability of the compressor.
Smart Images
Figure CN224496686U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a vehicle-mounted compressor, and more particularly to a compressor without an impeller pump. Background Technology
[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.
[0003] With the increasing variety of new energy vehicles, some models now offer in-vehicle refrigerators, which are powered by a motor to keep the compressor running.
[0004] In existing vehicle refrigerator compressors, oil is typically used to lubricate pistons and other components. However, this oil inevitably mixes with the refrigerant, necessitating an oil return system to separate the oil from the refrigerant and redirect it to the piston for lubrication. Current technology typically stores the separated oil in an oil chamber at the bottom of the compressor, and a top-mounted impeller pump lifts the oil from this chamber and redirects it back into the compressor block. However, this top-mounted impeller pump mechanism prevents the compressor motor from being positioned at the top, hindering diverse layout options. Furthermore, the impeller pump mechanism is costly, prone to damage, and difficult to maintain in a closed structure.
[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content
[0006] The purpose of this invention is to provide a compressor without an impeller pump, which can guide oil from the separation mechanism into the return oil pipeline by means of pressure difference, and achieve stable oil return by means of a flow controller.
[0007] To achieve the above objectives, this utility model discloses a non-impeller pump compressor, installed at the bottom of a motor, the motor including a motor main shaft, and the non-impeller pump compressor comprising:
[0008] A cylinder body, wherein a separation mechanism is provided on one side of the cylinder body, and a piston chamber is connected between the cylinder body and the separation mechanism;
[0009] The compressor main shaft passes through the top of the cylinder and is connected to the motor main shaft for transmission. A piston is connected to the output end of the compressor main shaft, and the piston is disposed in the piston chamber.
[0010] The oil return line has a first end and a second end that are arranged opposite to each other. The first end of the oil return line is connected to the separation mechanism, and the second end of the oil return line is connected to the cylinder block.
[0011] A flow controller is located between the first and second ends of the return oil pipeline.
[0012] As a further description of the above technical solution, the flow controller is configured as a throttling pipe, the throttling pipe is provided with a high-pressure side and a low-pressure side, the high-pressure side of the throttling pipe is provided on the side facing the separation mechanism, and the low-pressure side of the throttling pipe is provided on the side facing the cylinder body.
[0013] As a further description of the above technical solution, the first end of the return oil pipeline is located at the bottom of the separation mechanism.
[0014] As a further description of the above technical solution, the second end of the oil return pipeline is located on the side wall of the cylinder block.
[0015] As a further description of the above technical solution, the oil return pipeline includes a first section, a second section, a third section and a fourth section connected in sequence. The first section extends obliquely downward from the bottom of the separation mechanism, the second section is disposed at the bottom of the cylinder, the third section extends in a direction perpendicular to the cylinder, and the fourth section extends obliquely downward and is connected to the side wall of the cylinder.
[0016] As a further description of the above technical solution, the flow controller is located at the fourth section of the return oil pipeline.
[0017] As a further description of the above technical solution, the piston chamber extends in a horizontal direction, and the middle position of the separation mechanism is connected to the piston chamber.
[0018] As a further description of the above technical solution, the compressor main shaft passes through the cylinder body vertically from the top of the cylinder body.
[0019] As a further description of the above technical solution, the side of the compressor main shaft away from the cylinder body is connected to the motor main shaft.
[0020] As a further description of the above technical solution, a shaft seal is installed between the compressor main shaft and the motor main shaft.
[0021] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0022] This invention relates to a pumpless compressor that uses pressure differential to guide oil from the separation mechanism into the return oil line, and a flow controller to ensure stable oil return. Specifically, the separation mechanism, located at the end of the piston's working position, has a high pressure. Therefore, the pressure differential allows oil to be guided into the return oil line at the end of the separation mechanism, and the flow controller in the return oil line regulates the oil pressure, ensuring a stable and continuous return of oil to the cylinder block for continuous lubrication of the piston and other mechanisms. Furthermore, since this invention does not employ an impeller pump mechanism, the compressor main shaft can be positioned at the top of the cylinder block, and the motor can be mounted on the outer top of the cylinder block, allowing for flexible and diverse layout options.
[0023] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1-2 This is a partial cross-sectional schematic diagram of an impellerless pump compressor provided in the embodiments of this specification;
[0026] Figure 3 This is a three-dimensional schematic diagram of an impellerless pump compressor provided in the embodiments of this specification;
[0027] Figure 4 This is a cross-sectional schematic diagram of an impellerless pump compressor provided in the embodiments of this specification;
[0028] Figure 5 This is a schematic diagram of the separation mechanism of an impellerless pump compressor provided in the embodiments of this specification;
[0029] Figure 6 This is an exploded view of a multifunctional compression system provided in the embodiments of this specification;
[0030] In the picture:
[0031] 1. Refrigerator compressor; 11. Compressor main shaft; 12. Cylinder block; 13. Piston; 14. Separation mechanism; 15. Piston chamber; 16. Oil return line; 161. First stage; 162. Second stage; 163. Third stage; 164. Fourth stage; 165. Flow controller;
[0032] 2. Air compressor; 21. Air compressor spindle;
[0033] 3. Motor; 31. Motor spindle; 32. Motor base; 33. Air compressor bearing; 34. Bearing limit wave plate; 35. Shaft seal retaining ring; 36. Shaft seal; 37. Thrust bearing; 38. Overrunning clutch; 39. Counterweight; 310. Deep groove ball bearing; 311. Sleeve. Detailed Implementation
[0034] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.
[0035] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.
[0036] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.
[0037] Please see Figure 1-5 This embodiment describes a pumpless compressor, installed at the bottom of a motor 3. The motor 3 includes a motor shaft 31. The pumpless compressor includes:
[0038] A cylinder body 12, a separation mechanism 14 is provided on one side of the cylinder body 12, and a piston chamber 15 is connected between the cylinder body 12 and the separation mechanism 14.
[0039] The compressor main shaft 11 passes through the top of the cylinder 12 and is connected to the motor main shaft 31 for transmission. The output end of the compressor main shaft 11 is connected to a piston 13, which is disposed in the piston chamber 15.
[0040] The oil return line 16 has a first end and a second end that are arranged opposite to each other. The first end of the oil return line 16 is connected to the separation mechanism 14, and the second end of the oil return line 16 is connected to the cylinder block 12.
[0041] The flow controller 165 is located between the first and second ends of the return oil line 16.
[0042] Based on the above structure, please refer to the following during use: Figure 3 The motor 3 is located on one side of the top of the cylinder 12. When the motor 3 operates, it drives the motor main shaft 31 to rotate. The motor main shaft 31 drives the compressor main shaft 11 to rotate, causing the piston 13 at its end to reciprocate in the piston chamber 15, continuously compressing the refrigerant in the piston chamber 15. At the same time, the oil mixed with the compressed refrigerant is pushed to the separation mechanism 14 at the end of the piston 13. Since the refrigerant is in a gaseous state, it is absorbed and discharged by the corresponding mechanism, while the oil is in a high-density liquid state. After being sprayed onto the wall of the separation mechanism 14, it slides down and accumulates under the action of gravity.
[0043] It is worth noting that, because the refrigerant in the separation mechanism 14 is compressed, the pressure in the separation mechanism 14 increases, creating a pressure difference with the external oil return line 16. This causes the accumulated oil to be forced into the oil return line 16 under the influence of the pressure difference. The high-pressure oil in the oil return line 16 accumulates and flows downstream of the oil return line 16. After flowing to the flow controller 165 in the oil return line 16, the pressure is reduced, so the oil is sprayed back into the cylinder 12 at a more stable and uniform pressure, and participates in the subsequent lubrication of the piston 13.
[0044] In the above embodiments, oil in the separation mechanism 14 can be introduced into the return oil line 16 by means of pressure difference, and stable oil return can be achieved by means of flow controller. Specifically, since the separation mechanism 14 is located at the end of the working position of the piston 15, it has a high pressure. Therefore, oil can be introduced into the return oil line 16 at the end of the separation mechanism by means of pressure difference, and the oil pressure can be regulated by means of flow controller 165 in the return oil line 16, so as to stably and continuously transport the oil back to the cylinder 12, thereby achieving continuous lubrication of the piston 13 and other mechanisms.
[0045] Meanwhile, since no impeller pump mechanism is used in this utility model, the compressor main shaft 11 can be set at the top of the cylinder 12, and the motor 3 can be installed on the outer side of the top of the cylinder 12, thus realizing a flexible and diverse layout.
[0046] The following description uses an embodiment in which one of the motors 3 is mounted on top as an example.
[0047] Please see Figure 3 , 4 An air compressor bearing 33, a bearing limiting wave plate 34, a shaft seal retaining ring 35, a shaft seal 36, and a thrust bearing 37 are sequentially fitted between the first end of the motor main shaft 31 and the compressor main shaft 11 along the direction from the second end to the first end, and are limited within the cylinder 12 of the refrigerator compressor. Among them, the air compressor bearing 33 mainly serves to directly connect with the motor main shaft 31 and mainly bears the radial load perpendicular to the shaft axis, keeping the rotor radially concentric and reducing friction to ensure smooth rotation. Similarly, the thrust bearing 37 is located on the side closest to the compressor main shaft 11 and is mainly used to bear the axial thrust in the direction parallel to the shaft axis, preventing the rotor from overshooting due to the axial force generated by the pressure difference. The bearing limiting wave plate 34 has axial elasticity and is used to apply a constant axial preload, eliminate bearing clearance, suppress vibration and improve stiffness. Through the elastic deformation of its own wave spring, it applies an initial force to both ends in the axial direction to keep them in stable contact.
[0048] In this embodiment, the refrigerator and air compressor are actually driven by both ends of the motor spindle 31 of the same motor 3. Therefore, the motor 3 can only be installed at the top of the cylinder 12 in this embodiment. The shaft seal retaining ring 35 and shaft seal 36 structure in this embodiment are the most distinctive features compared to existing connection structures. Since the refrigerator compressor 1, air compressor and motor 3 in this embodiment may actually be connected, and the refrigerator compressor 1 side is mainly used for refrigerant processing, while the air compressor side is mainly used for air processing, and the refrigerant and air cannot come into contact with each other, it is necessary to set the shaft seal retaining ring 35 and shaft seal 36 to effectively block the compressor 1 and air compressor 2 and prevent the refrigerant and air from contacting each other. Specifically, the outer wall of the shaft seal 36 is fitted with the inner wall of the cylinder 12 of the refrigerator compressor 1, so that the first end side and the second end side of the shaft seal 36 are completely isolated by the shaft seal 36.
[0049] In existing refrigerator compressors with impeller pumps, the top of the cylinder 12 requires a closed impeller pump structure. This impeller pump structure, typically designed for sealing and integration, is a separate, enclosed housing covering the top of the cylinder 12. Therefore, it's difficult to synchronously position the motor 3 at the top of the cylinder 12 under these conditions. However, in this embodiment, the oil return line 16 uses a differential pressure and flow controller 165 to control the oil return, avoiding the need for the top impeller pump structure to cover the cylinder. This allows for a structural design where the top of the cylinder 12 has free space for the connection and sealing of the compressor main shaft 11 and the motor main shaft 31. In this embodiment, a single motor 3 can drive both the air conditioning unit and the air compressor, saving space and cost, and providing excellent sealing.
[0050] In this embodiment, the flow controller 165 is configured as a throttle tube, which has a high-pressure side and a low-pressure side. The high-pressure side of the throttle tube is located on the side facing the separation mechanism 14, and the low-pressure side is located on the side facing the cylinder 12. Therefore, the high-pressure oil transmitted from the separation mechanism 14 is transformed into an acceptable low-pressure, stable oil that is injected back into the cylinder 12 after being processed by the throttle tube, thus achieving a stable lubrication effect.
[0051] Please see Figure 1 , 2 The aforementioned return oil line 16 includes a first section 161, a second section 162, a third section 163, and a fourth section 164 connected in sequence. The first section 161 extends obliquely downward from the bottom of the separation mechanism 14. The second section 162 is located at the bottom of the cylinder body 12. The third section 163 extends in a direction perpendicular to the cylinder body 12. The fourth section 164 extends obliquely downward and connects to the side wall of the cylinder body 12. For details, please refer to... Figure 5 The first end of the return oil pipeline 16 is located at the bottom of the separation mechanism 14. In this embodiment, the first section 161 of the return oil pipeline 16 connects to the bottom of the separation mechanism 14, allowing for better reception of oil accumulated by gravity and smoother transport of the oil to the second section 162 via a slanted flow. The third section 163, under high oil pressure, rapidly and vertically pulls the oil to the fourth section 164. A throttle, acting as a flow controller 165, is located at the final section 164, quickly reducing the oil pressure and stably transporting the oil back to the cylinder 12 in a downward slant. This structural layout does not occupy excessive space in the cylinder 12 and maintains stable and rapid oil transport. It is worth noting that, to meet structural clearance requirements, additional sections of different directions and lengths can be added to the return oil pipeline 16 as needed.
[0052] It is worth noting that, see also Figure 1In this embodiment, the fourth section 164, used for installing the throttle, is directly connected to the outside and sealed by a bolt, which makes it easier to maintain and install the throttle.
[0053] Of course, in other embodiments, the return oil line 16 can be arranged in other ways according to the shape of the cylinder block 12, as long as it can be kept smooth and unobstructed.
[0054] Please see Figure 4 In this embodiment, the compressor main shaft 11 passes through the cylinder 12 vertically from the top of the cylinder 12. Therefore, the motor 3 is directly and stably installed at the top center of the cylinder 12, which has good connection strength and can keep the operating center of gravity of the compressor main shaft 11 stable.
[0055] In this embodiment, the compressor main shaft 11 is vertically connected to the piston 13. The rotation of the compressor main shaft 11 drives the piston 13 along... Figure 1 The piston moves in the left and right directions.
[0056] Please refer to the above. Figure 6 This is a complete multi-functional compression system, which includes:
[0057] Refrigerator compressor 1, which includes compressor main shaft 11;
[0058] Air compressor 2, which includes an air compressor main shaft 21;
[0059] Motor 3, motor 3 includes a through motor spindle 31, motor spindle 31 has a first end and a second end that are disposed opposite to each other;
[0060] The first end of the motor main shaft 31 is connected to the compressor main shaft 11 for transmission, so that when the motor 3 rotates forward, the first end of the motor main shaft 31 can drive the compressor main shaft 11 to rotate in the first direction, and when the motor 3 rotates backward, the first end of the motor main shaft 31 can drive the compressor main shaft 11 to rotate in the second direction.
[0061] The second end of the motor main shaft 31 is connected to the air compressor main shaft 21 via an overrunning clutch 38 for unidirectional rotation, so that when the motor 3 rotates forward, the second end of the motor main shaft 31 can drive the air compressor main shaft 21 to rotate in the third direction. When the motor 3 rotates backward, the second end of the motor main shaft 31 rotates freely, and the air compressor main shaft 21 remains stationary.
[0062] With the above structure, during use, the operator can input commands through an external vehicle-mounted computer host. The vehicle-mounted computer host is used to control the operation of motor 3, including starting, stopping, forward rotation, reverse rotation, or controlling the speed of motor 3.
[0063] Specifically, in the default state, motor 3 is in reverse rotation. In reverse rotation, the motor shaft 31 of motor 3 rotates, and the first end of the motor shaft 31 drives the compressor shaft 11 to rotate in the second direction, which in this embodiment is the reverse direction. This causes the compressor shaft 11 to drive the piston inside the refrigerator compressor 1 to move, compressing the refrigerant and keeping the vehicle refrigerator cooling. At the same time, since the second end of the motor shaft 31 is connected to an overrunning clutch 38, specifically, the overrunning clutch 38 is a one-way bearing that locks in forward rotation and rotates freely in reverse rotation, the two ends of the overrunning clutch 38 cannot be rotated together in reverse rotation. This prevents the motor shaft 31 from driving the air compressor shaft 21 to rotate synchronously. Therefore, the air compressor shaft 21 is not controlled by the motor shaft 21, and only the refrigerator compressor 1 drives the vehicle refrigerator to operate.
[0064] In special circumstances, when the operator wants to adjust the height of the air suspension, a command is input through the vehicle's computer host, causing the onboard computer to control the motor 3 to rotate forward. During this forward rotation, the motor shaft 31 of the motor 3 rotates, and the first end of the motor shaft 31 drives the compressor shaft 11 to rotate in a first direction (in this embodiment, forward rotation). This causes the compressor shaft 11 to drive the piston inside the refrigerator compressor 1, compressing the refrigerant and keeping the vehicle refrigerator cooling. Simultaneously, the overrunning clutch 38 locks during forward rotation, thus achieving a rotational connection between the two ends of the overrunning clutch 38. This causes the motor shaft 31 to drive the air compressor shaft 21 to rotate in a third direction (in this embodiment, forward rotation). Therefore, the air compressor shaft 21 drives the corresponding piston on one side of the air compressor to move, achieving adjustment of the air suspension's stiffness and height to meet the operator's needs. Furthermore, the refrigerator compressor 1 continues to operate the vehicle refrigerator for cooling.
[0065] Of course, the "upright" and "inverted" mentioned above are two relative directions that can be substituted and are not limiting.
[0066] Once the operator has adjusted the air suspension to the correct position, they input a command through the vehicle's computer host to control the motor 3 to reverse. At this time, the transmission connection between the second end of the motor main shaft 31 and the main shaft 21 of the air compressor is eliminated, the air suspension is maintained, and the vehicle's air conditioning continues to operate.
[0067] The overrunning clutch 38 can be a conventional multi-ring one-way bearing, similar to a ratchet structure. The overrunning clutch 38 can rotate freely in one direction (in this embodiment, the direction of reverse rotation of motor 3) and lock in the other direction (in this embodiment, the direction of forward rotation of motor 3). The metal housing of the overrunning clutch 38 contains many rollers, needle rollers or balls, and the shape of its rolling seat (cavity) makes it only able to roll in one direction, while generating great resistance in the other direction. Under the condition of generating resistance, the rotational connection between the two ends of the overrunning clutch 38 can be realized, so that the motor main shaft 31 drives the air compressor main shaft 21 to rotate.
[0068] Of course, in other embodiments, other types of clutches can also be used, as long as they can lock the motor spindle 31 in the forward rotation and disengage it in the reverse rotation.
[0069] The refrigerator compressor also includes a cylinder 12, which is connected to the motor 3 via a motor base 32. In this embodiment, the motor 3 is as follows... Figure 6 As shown, the first end is set as a cone with a radially reduced size. The motor base 32 fits perfectly on the cone structure. The contact surface between the motor base 32 and the motor 3 is large to achieve a connection with better sealing.
[0070] In the above embodiments, the shaft seal 36 can take the form of, for example... Figure 6 The ring shown has a groove along the axial direction. It abuts against the inner wall of the cylinder 12 on the outer periphery, effectively preventing gas and liquid from passing through it. The shaft seal retaining ring 35 is set as an elastic or C-type spring retaining ring installed in the shaft groove, used for axial positioning and as a fixing seal for the shaft seal 36. Its retaining ring is locked in the groove, and when the shaft seal 36 is pressed against the shaft seal retaining ring 35, it is precisely limited.
[0071] Please continue reading Figure 6 A counterweight 39 and a deep groove ball bearing 310 are sequentially fitted between the second end of the motor main shaft 21 and the air compressor main shaft 11 along the direction from the first end to the second end. The counterweight 39 is fitted outside the overrunning clutch 38. The main function of the counterweight 39 is to work in conjunction with the crank structure on one side of the air compressor main shaft 21 to balance the unbalanced components of the reciprocating inertial force of the piston and the rotational inertial force of the crank, preventing excessive vibration and thus effectively maintaining the stable rotation of the air compressor main shaft 21. In this embodiment, the overrunning clutch 38 is installed inside the counterweight 39, which saves axial space and prevents the overrunning clutch 38 from disengaging, providing a certain limiting effect. The deep groove ball bearing 310 is used to simultaneously bear large radial loads and bidirectional axial loads, forming a stable support effect between the motor main shaft 31 and the air compressor main shaft 21 structure.
[0072] In this embodiment, the motor 3 has a motor main shaft 31 that can synchronously output to two corresponding structures from both ends. Since the second end of the motor 1 has a sleeved overrunning clutch 38 device, it has different effects in forward and reverse rotation. In forward rotation, it can provide a stable transmission connection to the structure at the second end, while in reverse rotation, it disconnects the transmission connection to the air compressor main shaft 21 and other structures.
[0073] Meanwhile, in this embodiment, the first end of the motor 3 is equipped with a motor base 32, and a sleeve 311 covering the outer wall of the motor 3 is also provided. The first end of the sleeve 311 is installed with the motor 3, and the second end of the sleeve 311 is connected to the structure of the air compressor 2. The inner wall of the sleeve 311 is attached with a permanent magnet, which acts as the stator of the motor 3.
[0074] In this embodiment, the compressor main shaft 11 is connected to the piston 13 away from the motor main shaft 31, so that no matter whether the compressor main shaft 11 rotates forward or backward under the drive of the motor main shaft 31, the piston 13 can perform a regular compression stroke of the refrigerant to keep the refrigerator running continuously.
[0075] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.
[0076] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0077] Although this application has been described by way of examples, those skilled in the art will know that this application has many modifications and variations without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.
Claims
1. A pump-free compressor, mounted at the bottom of a motor, the motor including a motor shaft, characterized in that, The impellerless pump compressor includes: A cylinder body, wherein a separation mechanism is provided on one side of the cylinder body, and a piston chamber is connected between the cylinder body and the separation mechanism; The compressor main shaft passes through the top of the cylinder and is connected to the motor main shaft for transmission. A piston is connected to the output end of the compressor main shaft, and the piston is disposed in the piston chamber. The oil return line has a first end and a second end that are arranged opposite to each other. The first end of the oil return line is connected to the separation mechanism, and the second end of the oil return line is connected to the cylinder block. A flow controller is located between the first and second ends of the return oil pipeline.
2. The impellerless pump compressor according to claim 1, characterized in that: The flow controller is configured as a throttle tube, which has a high-pressure side and a low-pressure side. The high-pressure side of the throttle tube is located on the side facing the separation mechanism, and the low-pressure side of the throttle tube is located on the side facing the cylinder.
3. The impellerless pump compressor according to claim 1, characterized in that: The first end of the return oil pipeline is located at the bottom of the separation mechanism.
4. The impellerless pump compressor according to claim 1, characterized in that: The second end of the return oil line is located on the side wall of the cylinder block.
5. The impellerless pump compressor according to claim 1, characterized in that: The return oil pipeline includes a first section, a second section, a third section, and a fourth section connected in sequence. The first section extends obliquely downward from the bottom of the separation mechanism, the second section is located at the bottom of the cylinder, the third section extends in a direction perpendicular to the cylinder, and the fourth section extends obliquely downward and connects to the side wall of the cylinder.
6. The impellerless pump compressor according to claim 5, characterized in that: The flow controller is located at the fourth section of the return oil pipeline.
7. The impellerless pump compressor according to claim 6, characterized in that: The piston chamber extends horizontally, and the middle position of the separation mechanism is connected to the piston chamber.
8. The impellerless pump compressor according to claim 1, characterized in that: The compressor main shaft extends vertically through the cylinder body from the top of the cylinder body.
9. The impellerless pump compressor according to claim 8, characterized in that: The compressor main shaft is connected to the motor main shaft on the side opposite to the cylinder body.
10. The impellerless pump compressor according to claim 1, characterized in that: A shaft seal is installed between the compressor main shaft and the motor main shaft.