Liquid impact prevention structure of compressor
By designing an oil pool heating mechanism in the compressor and using a micro PTC heating core to heat the liquid refrigerant under extreme cold conditions, the problem of low-temperature and low-pressure liquid refrigerant caused by vortex disc strikes is solved, and the effect of avoiding vortex damage is achieved.
Patent Information
- Application Number
- CN202411768593.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-02-18
AI Technical Summary
When using a compressor in an extremely cold environment, the low-temperature and low-pressure liquid refrigerant cannot be compressed, resulting in a vortex disc hit, which will cause vortex damage to the long-term operation.
An oil pool heating mechanism is designed. When the compressor is started under extremely cold conditions, the micro PTC heating core will heat the oil pool located at the bottom of the intake port, so that the low-temperature and low-pressure liquid refrigerant passes through the intake port and passes through the oil. The pool generates a certain degree of superheat and vaporizes, thereby avoiding vortex hydraulic strikes.
By heating the liquid refrigerant, it is vaporized, and the liquid hit of the scroll is avoided and the service life of the compressor is extended.
Smart Images
Figure CN119467398A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of compressors, and more particularly to a compressor liquid impact prevention structure. Background Art
[0002] The compression chamber of the orbiting scroll compressor is mainly composed of two main parts: the orbiting scroll and the stationary scroll. Both of these disks are involute shaped and interlock with each other to form multiple crescent-shaped compression chambers. During the working process of suction, compression and exhaust, the stationary scroll is fixed on the frame, while the orbiting scroll is driven by the eccentric shaft and rotates in a plane with a small radius around the center of the stationary scroll base circle. This design allows the gas to be gradually compressed in the compression chamber formed by the interlocking of the orbiting and stationary scrolls, and then continuously discharged through the axial hole of the center component of the stationary scroll; When the compressor is used in an extremely cold environment, if the evaporator cannot control sufficient superheat, the refrigerant entering the compressor suction port is low-temperature and low-pressure liquid refrigerant. Since the liquid cannot be compressed, forced compression will cause liquid hammer on the scroll, and long-term operation will cause damage to the scroll. In order to solve the above-mentioned technical problems, the present application proposes an oil pool heating mechanism. When the compressor is started under extremely cold conditions, the micro PTC integrated inside the compressor will heat the oil pool located at the bottom of the air intake port. After the low-temperature and low-pressure liquid refrigerant passes through the air intake port, it will generate a certain degree of superheat when passing through the oil pool, causing the liquid refrigerant to vaporize, thereby avoiding vortex liquid hammer. Summary of the invention
[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a compressor liquid hammer prevention structure to solve the problems existing in the above-mentioned background technology.
[0004] The present invention provides the following technical solution: a compressor liquid impact prevention structure, including an electric scroll compressor, comprising: The air inlet is used for inputting low-temperature liquid refrigerant, and is installed on the side of the upper surface of the electric scroll compressor; A base, used for fixing the electric scroll compressor, wherein the base is installed at positions on both sides of the lower surface of the electric scroll compressor; The bottom oil storage tank is used to store the medium for heat transfer. The bottom oil storage tank is installed at the central position of the bottom of the electric scroll compressor, and the installation position of the bottom oil storage tank is located in the middle part of the two groups of bases, wherein the low-temperature liquid refrigerant enters the bottom oil storage tank through the air intake and the conveying mechanism for heating.
[0005] Furthermore, a sealing cover fastened by a bolt assembly is installed on the side of the bottom oil storage tank near the air intake port, wherein the sealing cover, when attached to the side of the bottom oil storage tank, can form an independent storage space with the bottom of the electric scroll compressor for storing the medium for heat transfer.
[0006] Furthermore, a PTC heating core is installed on the inner side of the bottom oil storage tank away from the sealing cover position, the PTC heating core is installed at the central position of the inner side of the bottom oil storage tank, and a PTC power supply core is installed at one end of the PTC heating core close to the bottom oil storage tank, wherein the PTC power supply core penetrates the inner wall of the bottom oil storage tank, and a power supply device is installed on the outer side of the bottom oil storage tank near the PTC power supply core, and the circuit system of the PTC heating core, the PTC heating core and the power supply device are in an electrically connected state.
[0007] Furthermore, a slide groove is provided at a central position of the inner side surface of the bottom of the bottom oil storage tank along a specific direction, and the slide groove extends from an edge of one side close to the sealing cover to an edge of the opposite side thereof.
[0008] Furthermore, a slider adapted to the inner wall of the slide is provided inside the slide, and a transmission screw is connected to the internal thread in the middle position of the slider, and a servo motor is installed at one end of the transmission screw. The servo motor is installed inside the bottom oil storage tank, and the servo motor inputs a stable working current to drive the transmission screw in a rotating state, thereby driving the slider to move parallel in the slide.
[0009] Furthermore, a scratch plate is installed on the top of the slider, the scratch plate is attached to the inner wall of the bottom oil storage tank, and telescopic plates are vertically installed on both sides of the scratch plate close to the slider.
[0010] Furthermore, the telescopic plate is composed of a plurality of sets of auxiliary plates connected in a socketed manner, and can change its length accordingly with the movement of the scratch plate.
[0011] The specific workflow of the present invention is: The specific workflow of this application is as follows: Step 1: When the electric scroll compressor is started in extremely cold conditions, the PTC power supply core senses that the external ambient temperature is lower than the normal range. At this time, the power supply device provides a stable working current to the PTC heating core and the PTC heating core. The PTC heating core heats the medium inside the bottom oil storage tank. The low-temperature and low-pressure liquid refrigerant flows through the air intake and the conveying mechanism to the inside of the bottom oil storage tank, gasifying the liquid refrigerant, thereby avoiding vortex liquid hammer. Step 2. When the staff replaces the heat transfer medium inside the bottom oil storage tank, the servo motor inputs a stable working current to drive the transmission screw to rotate, thereby driving the slider to move parallel in the slide groove. The moving slider drives the scratch plate to move inside the bottom oil storage tank, and the impurities remaining on the bottom of the inner side of the bottom oil storage tank are scratched and cleaned. The dust after scratching is discharged from the body of the bottom oil storage tank after removing the sealing cover, ensuring that the impurities inside the bottom oil storage tank will not stay.
[0012] Technical effects and advantages of the present invention: 1. The present invention can sense that the external ambient temperature is lower than the normal range through the PTC power core. At this time, the power supply device provides a stable working current to the PTC heating core and the PTC heating core. The PTC heating core heats the medium inside the bottom oil storage tank. The low-temperature and low-pressure liquid refrigerant flows through the air intake and the conveying mechanism to the inside of the bottom oil storage tank, so that the liquid refrigerant is gasified, thereby avoiding vortex liquid hammer.
[0013] 2. The present invention can input a stable working current through the servo motor to drive the transmission screw to rotate, thereby driving the slider to move parallel in the slide slot. The slider in the moving state drives the scraping plate to move inside the bottom oil reservoir, scraping and cleaning the impurities remaining at the bottom of the inner side of the bottom oil reservoir. The dust after scraping is discharged from the body of the bottom oil reservoir after removing the sealing cover, ensuring that the impurities inside the bottom oil reservoir will not stay and ensuring that its heat transfer efficiency is in a normal state. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0015] Figure 2 for Figure 1 Schematic diagram of some structures.
[0016] Figure 3 for Figure 2 Schematic diagram of the internal structure of the mid-bottom oil storage tank.
[0017] Figure 4 for Figure 3 Schematic diagram of partial structural cross-section of the middle and bottom oil storage tank.
[0018] Figure 5 for Figure 3 Schematic diagram of the main cross-section of the mid-bottom oil storage tank.
[0019] The accompanying drawings are marked as: 1. electric scroll compressor; 2. air intake; 3. base; 4. bottom oil storage tank; 401. sealing cover; 4011. bolt assembly; 402. PTC heating core; 403. PTC power core; 404. power supply device; 5. scratch plate; 501. telescopic plate; 502. slider; 503. servo motor; 504. transmission screw. DETAILED DESCRIPTION
[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are only examples. The compressor anti-liquid hammer structure involved in the present invention is not limited to the various structures recorded in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.
[0021] Reference Figure 1 to Figure 2 As shown, the present invention provides a compressor liquid hammer prevention structure, including an electric scroll compressor 1; The air inlet 2 is used for inputting low-temperature liquid refrigerant, and is installed at the side of the upper surface of the electric scroll compressor 1; A base 3, used for fixing the electric scroll compressor 1, wherein the base 3 is installed at positions on both sides of the lower surface of the electric scroll compressor 1; The bottom oil storage tank 4 is used to store the medium for heat transfer. The bottom oil storage tank 4 is installed at the central position of the bottom of the electric scroll compressor 1, and the installation position of the bottom oil storage tank 4 is located in the middle part of the two groups of bases 3, wherein the low-temperature liquid refrigerant enters the bottom oil storage tank 4 through the air intake port 2 and the conveying mechanism for heating.
[0022] Reference Figures 2 to 4 As shown, the present invention provides a compressor anti-liquid hammer structure, wherein the bottom oil reservoir 4 is provided with a sealing cover 401 fastened by a bolt assembly 4011 on the side near the air inlet 2, wherein the sealing cover 401, when attached to the side of the bottom oil reservoir 4, can form an independent storage space with the bottom of the electric scroll compressor 1 for storing a medium for heat transfer; A PTC heating core 402 is installed on the inner side of the bottom oil reservoir 4 away from the sealing cover 401, the PTC heating core 402 is installed at the central position of the inner side of the bottom oil reservoir 4, and a PTC power supply core 403 is installed at one end of the PTC heating core 402 close to the bottom oil reservoir 4, wherein the PTC power supply core 403 penetrates the inner wall of the bottom oil reservoir 4, and a power supply device 404 is installed on the outer side of the bottom oil reservoir 4 near the PTC power supply core 403, the PTC heating core 402, and the circuit system of the PTC heating core 402 and the power supply device 404 are in an electrically connected state.
[0023] In the embodiment of the present application, the specific working process of this part of the application embodiment is: when the electric scroll compressor 1 is started under extremely cold conditions, the PTC power core 403 senses that the external ambient temperature is lower than the normal range. At this time, the power supply device 404 provides a stable working current to the PTC heating core 402 and the PTC heating core 402. The PTC heating core 402 heats the medium inside the bottom oil storage tank 4, and the low-temperature and low-pressure liquid refrigerant flows through the interior of the bottom oil storage tank 4 through the air intake 2 and the conveying mechanism, so that the liquid refrigerant is vaporized, thereby avoiding vortex liquid hammer.
[0024] Reference Figure 3 to Figure 4 As shown, the present invention provides a compressor anti-liquid impact structure, wherein a slide groove is provided at the central position of the inner side surface of the bottom of the bottom oil storage tank 4 along a specific direction, and the slide groove extends from the edge of one side close to the sealing cover 401 to the edge of the opposite side thereof; The interior of the slide groove is provided with a slider 502 adapted to the inner wall thereof, and the internal thread in the middle position of the slider 502 is connected with a transmission screw 504, and a servo motor 503 is installed at one end of the transmission screw 504, and the servo motor 503 is installed inside the bottom oil storage tank 4. The servo motor 503 inputs a stable working current to drive the transmission screw 504 to rotate, thereby driving the slider 502 to move parallel in the slide groove; A scratch plate 5 is installed on the top of the slider 502, the scratch plate 5 is attached to the inner wall of the bottom oil storage tank 4, and telescopic plates 501 are vertically installed on both sides of the scratch plate 5 close to the slider 502; The telescopic plate 501 is composed of a plurality of sets of auxiliary plates connected in a socket manner, and can change its length accordingly as the scratch plate 5 moves.
[0025] In the embodiment of the present application, the specific working process of this part of the application embodiment is: when the staff replaces the heat transfer medium inside the bottom oil storage tank 4, the servo motor 503 inputs a stable working current to drive the transmission screw 504 in a rotating state, thereby driving the slider 502 to move parallel in the slide groove, and the slider 502 in the moving state drives the scratch plate 5 to move inside the bottom oil storage tank 4, and the impurities remaining on the bottom of the inner side of the bottom oil storage tank 4 are scratched and cleaned. The dust after scratching is discharged from the body of the bottom oil storage tank 4 after removing the sealing cover 401, ensuring that the impurities inside the bottom oil storage tank 4 will not stay.
[0026] The specific workflow of this application is as follows: Step 1: When the electric scroll compressor 1 is started under extremely cold conditions, the PTC power supply core 403 senses that the external ambient temperature is lower than the normal range. At this time, the power supply device 404 provides a stable working current to the PTC heating core 402 and the PTC heating core 402. The PTC heating core 402 heats the medium inside the bottom oil storage tank 4. The low-temperature and low-pressure liquid refrigerant flows through the inside of the bottom oil storage tank 4 through the air intake 2 and the conveying mechanism, so that the liquid refrigerant is gasified, thereby avoiding vortex liquid hammer; Step 2. When the staff replaces the heat transfer medium inside the bottom oil storage tank 4, the servo motor 503 inputs a stable working current to drive the transmission screw 504 in a rotating state, thereby driving the slider 502 to move parallel in the slide groove. The slider 502 in the moving state drives the scratch plate 5 to move inside the bottom oil storage tank 4, and the impurities remaining on the bottom of the inner side of the bottom oil storage tank 4 are scratched and cleaned. The dust after scratching is discharged from the body of the bottom oil storage tank 4 after removing the sealing cover 401, ensuring that the impurities inside the bottom oil storage tank 4 will not stay.
[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change; Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other; Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A compressor anti-liquid hammer structure, comprising an electric scroll compressor (1), characterized in that: include: An air intake port (2) is used for inputting low-temperature liquid refrigerant, and is installed at a side edge of the upper surface of the electric scroll compressor (1); A base (3) for fixing the electric scroll compressor (1), wherein the base is installed at positions on both sides of the lower surface of the electric scroll compressor (1); The bottom oil storage tank (4) is used to store a medium for heat transfer. The bottom oil storage tank (4) is installed at the central position of the bottom of the electric scroll compressor (1), and the installation position of the bottom oil storage tank (4) is located in the middle part of the two groups of bases (3). The low-temperature liquid refrigerant enters the bottom oil storage tank (4) through the air intake port (2) and the conveying mechanism to perform heating operations.
2. A compressor liquid impact prevention structure according to claim 1, characterized in that: The bottom oil reservoir (4) is provided with a sealing cover (401) fastened by a bolt assembly (4011) on the side surface close to the air inlet (2), wherein the sealing cover (401) can form an independent storage space with the bottom of the electric scroll compressor (1) when it is attached to the side surface of the bottom oil reservoir (4) for storing a heat transfer medium.
3. A compressor liquid impact prevention structure according to claim 2, characterized in that: A PTC heating core (402) is installed on the inner side surface of the bottom oil reservoir (4) away from the sealing cover (401), the PTC heating core (402) is installed at the central position of the inner side surface of the bottom oil reservoir (4), and a PTC power supply core (403) is installed at one end of the PTC heating core (402) close to the bottom oil reservoir (4), wherein the PTC power supply core (403) penetrates the inner wall of the bottom oil reservoir (4), and a power supply device (404) is installed on the outer side surface of the bottom oil reservoir (4) at a position close to the PTC power supply core (403), and the PTC heating core (402) and the circuit system of the PTC heating core (402) and the power supply device (404) are in an electrically connected state.
4. A compressor liquid impact prevention structure according to claim 2, characterized in that: A slide groove is provided at the central position of the inner side surface of the bottom of the bottom oil storage tank (4) along a specific direction, and the slide groove extends from an edge on one side close to the sealing cover (401) to an edge on the opposite side.
5. A compressor liquid impact prevention structure according to claim 4, characterized in that: The interior of the slide groove is provided with a slider (502) adapted to the inner wall thereof, the middle position of the slider (502) is internally threadedly connected to a transmission screw (504), one end of the transmission screw (504) is mounted with a servo motor (503), the servo motor (503) is mounted inside the bottom oil storage tank (4), the servo motor (503) inputs a stable working current to drive the transmission screw (504) to be in a rotating state, thereby driving the slider (502) to move parallel in the slide groove.
6. A compressor liquid-surge prevention structure according to claim 5, characterized in that: A scratch plate (5) is installed on the top of the slider (502), the scratch plate (5) is attached to the inner wall of the bottom oil storage tank (4), and telescopic plates (501) are vertically installed on both sides of the scratch plate (5) near the slider (502).
7. A compressor liquid impact prevention structure according to claim 6, characterized in that: The telescopic plate (501) is composed of a plurality of sets of auxiliary plates connected in a sleeve manner, and can change its length accordingly with the movement of the scratch plate (5).