Compressor having refrigerant flow regulating function

Abstract

The utility model belongs to compressor technical field discloses a kind of compressor with refrigerant flow regulating function, including back cover, static disc and solenoid valve.When compressor normal operation, the valve core of solenoid valve is blocked in low pressure through hole, at this time, exhaust cavity refrigerant pressure is greater than high pressure cavity refrigerant pressure is greater than low pressure cavity refrigerant pressure.When compressor needs ultra-low speed operating condition, compressor first reduces speed, when lowest speed cannot satisfy operating condition requirement, solenoid valve control valve core is withdrawn from low pressure through hole, low pressure through hole gradually communicates with reflux cavity, that is, with high pressure through hole communication, at this time, high pressure cavity has been compressed high pressure refrigerant through high pressure through hole, reflux cavity, low pressure through hole and returns to low pressure cavity, completes the short circuit of refrigerant to reduce refrigerant flow, realizes active refrigerant flow regulation, to reach the effect of refrigerant flow being further actively reduced under lowest speed, realizes the equivalent demand of vehicle-mounted refrigerator compressor ultra-low speed.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor with refrigerant flow regulation function. Background Technology

[0002] As in-vehicle systems become increasingly multifunctional, some vehicles are now equipped with in-vehicle refrigerator systems, providing users with convenient refrigeration during their travels. The compressors in these refrigerators need to operate at low speeds in specific scenarios to maintain low refrigerant flow, such as during light cooling or insulation. However, current ultra-low speed compressors on the market generally suffer from untimely refrigerant adjustment: when the speed drops to the ultra-low range, the dynamic response of the refrigerant flow lags, failing to quickly match subtle changes in cooling demand, easily leading to system pressure fluctuations and a sharp drop in cooling efficiency. This adjustment lag directly results in extremely unstable compressor operation under ultra-low speed conditions, not only affecting the stability of refrigeration performance but also exacerbating component wear due to frequent operating condition fluctuations, shortening equipment lifespan, and becoming a key bottleneck restricting the improvement of the in-vehicle refrigerator system experience.

[0003] Therefore, there is an urgent need to develop a compressor with refrigerant flow regulation function to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a compressor with refrigerant flow regulation function, which can further actively reduce the refrigerant flow at the lowest speed, thus achieving the equivalent requirement of ultra-low speed for vehicle refrigerator compressors.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A compressor with refrigerant flow regulation function for use in a vehicle refrigerator includes:

[0007] The rear cover has an opening inside, and the bottom wall of the opening has a reflux chamber and an exhaust chamber.

[0008] The stationary plate has its bottom outer surface abutting against the bottom wall of the opening. The stationary plate has high-pressure through holes and low-pressure through holes. The stationary plate has volute teeth inside, which are used to cooperate with the volute teeth of the moving plate to form a compression chamber. The compression chamber is divided into a high-pressure chamber and a low-pressure chamber. The high-pressure chamber is connected to the return chamber through the high-pressure through hole, and the low-pressure chamber is connected to the return chamber through the low-pressure through hole.

[0009] The solenoid valve consists of a valve and a valve core. The valve is fixedly connected to the bottom wall of the return chamber, and the valve core is movably inserted through the low-pressure through hole and can block the low-pressure through hole.

[0010] Preferably, the compressor with refrigerant flow regulation function also includes a sealing gasket, which is sandwiched between the bottom wall of the opening and the stationary plate.

[0011] Preferably, the sealing gasket has a first notch and a second notch, the shape of the first notch being the same as the shape of the reflux chamber opening, and the shape of the second notch being the same as the shape of the exhaust chamber opening.

[0012] Preferably, the compressor with refrigerant flow regulation function also includes an exhaust port, through which the exhaust chamber is connected to the outside.

[0013] Preferably, an exhaust port is provided on the bottom wall of the high-pressure chamber, and the exhaust port is located at the center of the high-pressure chamber, through which the high-pressure chamber communicates with the exhaust chamber.

[0014] Preferably, the number of high-pressure through holes is at least two, and the at least two high-pressure through holes are evenly distributed along the circumference of the exhaust hole.

[0015] Preferably, an air intake hole is provided on the side wall of the low-pressure chamber, through which the low-pressure chamber communicates with the outside.

[0016] Preferably, the distance between the low-pressure through hole and the suction hole is smaller than the distance between the high-pressure through hole and the suction hole.

[0017] Preferably, the depth direction of the exhaust chamber is the same as the depth direction of the return chamber, and the depth of the exhaust chamber is greater than the depth of the return chamber.

[0018] Preferably, the solenoid valve also includes a valve body, which is fixedly connected to the outer surface of the rear cover.

[0019] The beneficial effects of this utility model are:

[0020] This embodiment provides a compressor with refrigerant flow regulation function, including a rear cover, a stationary plate, and a solenoid valve. When the compressor is running normally, the valve core of the solenoid valve is sealed within the low-pressure through-hole, and the low-pressure chamber and high-pressure chamber are independent chambers. At this time, the refrigerant pressure in the exhaust chamber is greater than the refrigerant pressure in the high-pressure chamber, which is greater than the refrigerant pressure in the low-pressure chamber. When the compressor requires ultra-low speed operation, the compressor first reduces its speed. When the minimum speed cannot meet the operating requirements, the solenoid valve controls the valve core to retract from the low-pressure through-hole, and the low-pressure through-hole gradually connects with the return chamber, that is, with the high-pressure through-hole. At this time, the high-pressure refrigerant that has been compressed in the high-pressure chamber flows back to the low-pressure chamber through the high-pressure through-hole, the return chamber, and the low-pressure through-hole, completing the refrigerant short circuit to reduce the refrigerant flow and achieving active refrigerant flow regulation. This achieves the effect of further actively reducing the refrigerant flow at the minimum speed, realizing the equivalent requirement of ultra-low speed for the vehicle refrigerator compressor. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the compressor structure provided in this embodiment;

[0022] Figure 2 yes Figure 1A cross-sectional view along the AA direction;

[0023] Figure 3 This is a schematic diagram of the first structure of the back cover provided in this embodiment;

[0024] Figure 4 This is a schematic diagram of the second structure of the rear cover provided in this embodiment;

[0025] Figure 5 This is a schematic diagram of the static disk structure provided in this embodiment;

[0026] Figure 6 This is a schematic diagram of the sealing gasket structure provided in this embodiment.

[0027] In the picture:

[0028] 100. Rear cover; 110. Opening cavity; 120. Return cavity; 130. Exhaust cavity; 200. Static plate; 201. High pressure through hole; 202. Low pressure through hole; 210. Vortex tooth; 220. High pressure cavity; 221. Exhaust port; 230. Low pressure cavity; 231. Intake port; 300. Solenoid valve; 310. Valve core; 400. Sealing gasket; 410. First notch; 420. Second notch; 500. Exhaust port. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] This embodiment provides a compressor with refrigerant flow regulation function, which can further actively reduce the refrigerant flow at the lowest speed, thus achieving the equivalent requirement of ultra-low speed for vehicle refrigerator compressors.

[0034] Specifically, such as Figures 1 to 2As shown, a compressor with refrigerant flow regulation function is used in a vehicle refrigerator. It includes a rear cover 100, a stationary plate 200 and a solenoid valve 300. The rear cover 100 has an opening 110 inside, and the bottom wall of the opening 110 has a return cavity 120 and an exhaust cavity 130. The bottom outer surface of the stationary plate 200 abuts against the bottom wall of the opening 110. The stationary plate 200 is provided with a high-pressure through hole 201 and a low-pressure through hole 202. The stationary plate 200 is provided with a scroll tooth 210, which is used to cooperate with the scroll tooth of the moving plate to form a compression chamber. Since the pressure in the compression chamber gradually increases from the outside to the inside of the refrigerant pressure, the compression chamber is divided into a high-pressure chamber 220 and a low-pressure chamber 230. The high-pressure chamber 220 is connected to the return chamber 120 through the high-pressure through hole 201, and the low-pressure chamber 230 is connected to the return chamber 120 through the low-pressure through hole 202. The return chamber 120 allows the lubricating oil that is not completely separated to flow back to the compression chamber with the refrigerant to participate in lubrication again. The exhaust chamber 130 is used to temporarily store the separated high-pressure refrigerant and stabilize the exhaust pressure. The two work together to achieve oil circulation and exhaust pressure stabilization. The solenoid valve 300 includes a valve and a valve core 310. The valve is fixedly connected to the bottom wall of the return chamber 120, precisely controlling the timing and flow rate of the return of lubricating oil and refrigerant deposited at the bottom of the return chamber 120. This ensures proper lubrication and prevents excessive refrigerant from entering the compression chamber and affecting efficiency. The valve core 310 is movably inserted through the low-pressure through hole 202 and can block the low-pressure through hole 202, thereby adjusting the different gaps between the valve core 310 and the inner wall of the low-pressure through hole 202, as well as blocking the low-pressure through hole 202 by the valve core 310.

[0035] When the compressor is running normally, the valve core 310 of the solenoid valve 300 is sealed within the low-pressure through-hole 202. The low-pressure chamber 230 and the high-pressure chamber 220 are independent chambers. At this time, the refrigerant pressure in the exhaust chamber 130 is greater than the refrigerant pressure in the high-pressure chamber 220, which is greater than the refrigerant pressure in the low-pressure chamber 230. When the compressor requires ultra-low speed operation, the compressor first reduces its speed. When the minimum speed cannot meet the operating requirements, the solenoid valve 300 controls the valve core 310 to retract from the low-pressure through-hole 202. The low-pressure through-hole 202 gradually connects with the return chamber 120, which in turn connects with the high-pressure through-hole 201. At this time, the high-pressure refrigerant that has been compressed in the high-pressure chamber 220 flows back to the low-pressure chamber 230 through the high-pressure through-hole 201, the return chamber 120, and the low-pressure through-hole 202, completing the refrigerant short circuit to reduce the refrigerant flow and achieving active refrigerant flow regulation. This further actively reduces the refrigerant flow at the minimum speed, achieving the equivalent requirement of ultra-low speed for the vehicle refrigerator compressor. In addition, the solenoid valve 300 controls the position of the valve core 310 by controlling the opening degree, and controls the gap between the valve core 310 and the low-pressure through hole 202 to precisely adjust the refrigerant return flow rate and adapt to different operating conditions.

[0036] Furthermore, such as Figure 2As shown, in order to provide more sufficient temporary storage space for the high-pressure refrigerant to stabilize the exhaust pressure, and at the same time reserve sufficient buffer for oil-gas separation to ensure efficient discharge of the separated refrigerant, the depth direction of the exhaust chamber 130 is the same as the depth direction of the return chamber 120, and the depth of the exhaust chamber 130 is greater than the depth of the return chamber 120.

[0037] Optionally, such as Figures 3 to 4 As shown, the compressor with refrigerant flow regulation function also includes an exhaust port 500. The exhaust chamber 130 is connected to the outside through the exhaust port 500, and the high-pressure refrigerant temporarily stored in the exhaust chamber 130 is exported to the refrigeration system to realize the orderly discharge and circulation of the compressed refrigerant and ensure the continuity of the refrigeration process.

[0038] Furthermore, an exhaust port 221 is provided on the bottom wall of the high-pressure chamber 220. The high-pressure chamber 220 is connected to the exhaust chamber 130 through the exhaust port 221, allowing the high-pressure refrigerant accumulated in the high-pressure chamber 220 to be discharged to the exhaust chamber 130 in a timely manner. This prevents abnormal pressure increases within the high-pressure chamber 220 and ensures pressure balance and normal operation of the compressor. The exhaust port 221 is located at the center of the high-pressure chamber 220, which facilitates the uniform flow and discharge of the refrigerant from the center to the surrounding areas, reducing exhaust resistance and ensuring smooth exhaust and pressure balance within the high-pressure chamber 220.

[0039] Furthermore, the number of high-pressure through holes 201 is at least two, and the at least two high-pressure through holes 201 are evenly distributed circumferentially along the exhaust hole 221, which improves the smoothness of the flow of high-pressure refrigerant between the high-pressure chamber 220 and the return chamber 120, facilitates the rapid discharge of high-pressure refrigerant after compression from the high-pressure chamber 220 to the return chamber 120, reduces exhaust residue, and improves exhaust efficiency and compression performance. In this embodiment, the number of high-pressure through holes 201 is two. In other embodiments, the number of high-pressure through holes 201 can also be three, four, or five, etc.

[0040] Optionally, such as Figure 5 As shown, an air intake hole 231 is provided on the side wall of the low-pressure chamber 230. The low-pressure chamber 230 is connected to the outside through the air intake hole 231, so that the low-pressure refrigerant can enter the low-pressure chamber 230 from the outside through the air intake hole 231, avoiding the airflow directly hitting the internal components of the low-pressure chamber 230, while ensuring that the refrigerant is evenly filled into the low-pressure chamber 230, providing a stable air source for the compression process.

[0041] Furthermore, the distance between the low-pressure through-hole 202 and the suction port 231 is smaller than the distance between the high-pressure through-hole 201 and the suction port 231. That is, the low-pressure through-hole 202 is opened on the side closer to the suction port 231, which reduces the resistance of the low-pressure refrigerant entering the low-pressure chamber 230, and at the same time avoids the high-pressure refrigerant and the low-pressure refrigerant from mixing too early, thus ensuring effective separation and compression efficiency between the high-pressure chamber 220 and the low-pressure chamber 230.

[0042] Optionally, such as Figure 4 As shown, the solenoid valve 300 also includes a valve body, which is fixedly connected to the outer surface of the rear cover 100. By precisely controlling the opening and closing of the valve, the flow state of refrigerant or lubricating oil in the rear cover 100 is adjusted, thereby achieving effective control of key operating conditions such as compressor exhaust and oil return.

[0043] Optionally, such as Figure 2 and Figure 6 As shown, the compressor with refrigerant flow regulation function also includes a sealing gasket 400. The sealing gasket 400 is sandwiched between the bottom wall of the opening 110 and the stationary plate 200, so as to realize the independence between the return chamber 120 and the exhaust chamber 130, prevent the high-pressure refrigerant from flowing back with the lubricating oil and refrigerant, ensure the pressure of the return chamber 120 and the exhaust chamber 130 is stable and the fluid flows along the preset path, thereby improving the compressor's working efficiency and reliability.

[0044] Furthermore, the sealing gasket 400 has a first notch 410 and a second notch 420. The shape of the first notch 410 is the same as the shape of the opening of the return cavity 120, and the shape of the second notch 420 is the same as the shape of the opening of the exhaust cavity 130. This prevents the sealing gasket 400 from blocking the fluid channels of the return cavity 120 and the exhaust cavity 130, ensuring that the return and exhaust paths are unobstructed while achieving reliable sealing between the chambers.

[0045] The working process and principle of the compressor with refrigerant flow regulation function provided in this embodiment are as follows:

[0046] Low-pressure through hole 202 and high-pressure through hole 201 are respectively opened at the suction port 231 (low-pressure chamber 230) and the compression chamber (high-pressure chamber 220) near the static plate 200 of the compressor, and a recirculation chamber 120 and a solenoid valve 300 are provided at the corresponding positions on the rear cover 100 of the compressor. When the compressor is running normally, the valve core 310 of the solenoid valve 300 closes the low-pressure through hole 202. When the compressor requires low speed and low flow conditions, and the compressor speed is reduced to the minimum, it still cannot meet the operating requirements. Then, the opening of the valve core 310 is controlled by the solenoid valve 300, and the valve core 310 no longer blocks the low-pressure through hole 202, so that the low-pressure chamber 230 is connected to the high-pressure through hole 201. Under the action of pressure difference, the high-pressure refrigerant in the high-pressure chamber 220 flows back to the suction port 231 side of the stationary plate 200 through the low-pressure through hole 202 and the high-pressure through hole 201. The low-temperature and low-pressure refrigerant is drawn into the low-pressure chamber 230 inside the stationary plate 200 from the suction port. It is compressed from the outside to the center through the compression chamber formed by the cooperation of the scroll teeth 210 and the scroll teeth of the moving plate. The pressure gradually increases and becomes high-temperature and high-pressure refrigerant, which is discharged from the exhaust port 221 in the center of the stationary plate 200. This achieves the effect of further actively reducing the refrigerant flow at the minimum speed, and realizes the equivalent requirement of ultra-low speed of the vehicle refrigerator compressor.

[0047] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A compressor with refrigerant flow regulation function for use in a vehicle refrigerator, characterized in that, include: The rear cover (100) has an opening (110) inside, and the bottom wall of the opening (110) has a reflux chamber (120) and an exhaust chamber (130); A stationary disc (200) has its bottom outer surface abutting against the bottom wall of the opening (110). The stationary disc (200) has a high-pressure through hole (201) and a low-pressure through hole (202). The stationary disc (200) has a vortex tooth (210) inside. The vortex tooth (210) is used to cooperate with the vortex tooth of the moving disc to form a compression chamber. The compression chamber is divided into a high-pressure chamber (220) and a low-pressure chamber (230). The high-pressure chamber (220) is connected to the return chamber (120) through the high-pressure through hole (201), and the low-pressure chamber (230) is connected to the return chamber (120) through the low-pressure through hole (202). The solenoid valve (300) includes a valve and a valve core (310). The valve is fixedly connected to the bottom wall of the return chamber (120). The valve core (310) is movably inserted through the low-pressure through hole (202) and can block the low-pressure through hole (202).

2. The compressor with refrigerant flow regulation function according to claim 1, characterized in that, The compressor with refrigerant flow regulation function also includes a sealing gasket (400), which is sandwiched between the bottom wall of the opening (110) and the stationary plate (200).

3. The compressor with refrigerant flow regulation function according to claim 2, characterized in that, The sealing gasket (400) has a first notch (410) and a second notch (420). The shape of the first notch (410) is the same as the shape of the opening of the return cavity (120), and the shape of the second notch (420) is the same as the shape of the opening of the exhaust cavity (130).

4. The compressor with refrigerant flow regulation function according to claim 1, characterized in that, The compressor with refrigerant flow regulation function also includes an exhaust port (500), and the exhaust chamber (130) is connected to the outside through the exhaust port (500).

5. The compressor with refrigerant flow regulation function according to claim 4, characterized in that, The high-pressure chamber (220) has an exhaust hole (221) on its bottom wall. The exhaust hole (221) is located at the center of the high-pressure chamber (220). The high-pressure chamber (220) is connected to the exhaust chamber (130) through the exhaust hole (221).

6. The compressor with refrigerant flow regulation function according to claim 5, characterized in that, The number of high-pressure through holes (201) is at least two, and the at least two high-pressure through holes (201) are evenly distributed along the circumference of the exhaust hole (221).

7. The compressor with refrigerant flow regulation function according to claim 1, characterized in that, An air intake hole (231) is provided on the side wall of the low-pressure chamber (230), and the low-pressure chamber (230) is connected to the outside through the air intake hole (231).

8. The compressor with refrigerant flow regulation function according to claim 7, characterized in that, The distance between the low-pressure through hole (202) and the air intake hole (231) is less than the distance between the high-pressure through hole (201) and the air intake hole (231).

9. The compressor with refrigerant flow regulation function according to any one of claims 1-8, characterized in that, The depth direction of the exhaust chamber (130) is the same as the depth direction of the return chamber (120), and the depth of the exhaust chamber (130) is greater than the depth of the return chamber (120).

10. The compressor with refrigerant flow regulation function according to any one of claims 1-8, characterized in that, The solenoid valve (300) also includes a valve body, which is fixedly connected to the outer surface of the rear cover (100).

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