Efficient cooling system and method of Freon refrigerator

Abstract

The invention discloses an efficient cooling system and method for a Freon refrigerating machine, and relates to the technical field of refrigerating machine cooling. The efficient cooling system comprises an evaporator, a semi-closed compressor is installed at one end of the evaporator, an oil separator is installed at one end of the semi-closed compressor, and an evaporative condenser is installed at one end of the oil separator; the spiral sheets are mounted in the gas inlet pipe, so that gas is forced to flow along a spiral path, strong centrifugal force is generated, and heavy oil drops in the gas are thrown to the inner wall of the gas inlet pipe, start to flow downwards under the action of gravity and are gradually gathered at the bottom of the separation tank; gas is injected into the oily absorption medium at the bottom of the separation tank through the gas inlet pipe and is fully mixed and contacted with the surrounding oily absorption medium, oil drops are captured and dissolved in the oily absorption medium, and compared with a traditional physical separation method, the method can more thoroughly remove the oil drops in the gas.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling the temperature of a refrigerator, and more particularly to a high-efficiency cooling system and method for a Freon refrigerator. Background Art

[0002] As a class of halogenated hydrocarbon compounds widely used in the field of refrigeration, Freon's excellent thermodynamic properties make it the core working medium in early refrigeration technology. The basic principle of Freon refrigerator is based on the vapor compression refrigeration cycle, which mainly includes four processes: compression, condensation, throttling and evaporation. In this cycle, Freon is compressed into a high-temperature and high-pressure gas by a compressor, and then enters the condenser to dissipate heat and liquefy; then it is reduced in pressure and temperature through a throttle valve, and finally enters the evaporator to absorb heat from the surrounding environment and vaporize, thereby achieving a cooling effect. Freon refrigerators have promoted the popularization and development of modern refrigeration technology in the past few decades, especially in the fields of air conditioning, refrigerators, cold chain logistics, etc. It has played an important role. Its efficient cooling mechanism is still worthy of in-depth research and optimized application.

[0003] The reason why Freon refrigerators can achieve efficient cooling is mainly due to their excellent heat conduction properties and controllable phase change process. During actual operation, Freon absorbs a large amount of heat when it changes from liquid to gas in the evaporator. This latent heat effect is the key factor for its efficient refrigeration. At the same time, the saturated vapor pressure of Freon at room temperature is moderate, which facilitates the work of the compressor and the overall design of the system, allowing the entire refrigeration cycle to operate under relatively ideal conditions, thereby improving energy utilization efficiency.

[0004] In actual use of the existing technology, when the refrigerant circulates in the refrigeration system, it is compressed by the compressor and mixed with the refrigerant through lubricating oil, which not only plays a lubricating role but also helps dissipate heat. If the lubricating oil enters the condenser and evaporator together with the refrigerant, an oil film will be formed on the heat exchange surface of these devices, significantly reducing the heat transfer efficiency. This not only affects the cooling effect, but also increases energy consumption. Therefore, in response to the above technical problems, it is necessary to provide an efficient cooling system and method for Freon refrigerators. Summary of the Invention

[0005] The object of the present invention is to provide a high-efficiency cooling system and method for a Freon refrigerator to solve the above-mentioned problems.

[0006] In order to achieve the above-mentioned objectives, the technical solution provided by the present invention is as follows: an efficient cooling system of a Freon refrigeration machine, comprising an evaporator, a semi-hermetic compressor is installed at one end of the semi-hermetic compressor, an oil separator is installed at one end of the oil separator, an evaporative condenser is installed at one end of the evaporative condenser, a siphon tank is installed at one end of the evaporative condenser, a liquid storage tank is installed at one end of the siphon tank, an electronic expansion valve is installed at the inlet of the evaporator, and a temperature sensor is installed at the outlet of the evaporator; the oil separator comprises a separation tank located between the semi-hermetic compressor and the evaporative condenser, an air inlet pipe is fixedly connected to the middle part of the inner cavity of the separation tank, an exhaust pipe is connected to the upper part of the outer surface of the separation tank, an oil drain pipe is connected to the lower part of the outer surface of the separation tank, a spiral sheet is fixedly connected to the inner cavity of the intake pipe, an air guide hood is fixedly connected to the lower part of the inner cavity of the separation tank, a rotating part is rotatably connected to the outer surface of the intake pipe, and an oil suction part is installed on the outer surface of the rotating part.

[0007] As a further improvement of the present invention, the output end of the evaporator is connected to the input end of the semi-hermetic compressor through a pipeline, and the output end of the semi-hermetic compressor is connected to the input end of the oil separator through a pipeline.

[0008] As a further improvement of the present invention, the output end of the evaporative condenser is connected to the input end of the siphon tank through a pipeline, and the output end of the siphon tank is connected to the input pipe of the liquid storage tank through a pipeline.

[0009] As a further improvement of the present invention, a safety valve is installed on the liquid storage tank, the output end of the liquid storage tank is connected to an economizer through a pipeline, and the output end of the economizer is connected to the input end of the evaporator through a pipeline to form a circulation.

[0010] As a further improvement of the present invention, the evaporator, semi-hermetic compressor, oil separator, evaporative condenser, siphon tank and liquid storage tank are electrically connected via wires.

[0011] As a further improvement of the present invention, one end of the air inlet pipe located outside the separation tank is connected to the output end of the semi-enclosed compressor, and the exhaust pipe is connected to the input end of the siphon tank.

[0012] As a further improvement of the present invention, the rotating member includes a rotating sleeve rotatably connected to the outer surface of the intake pipe, the outer surface of the upper end of the rotating sleeve is fixedly connected to a ring gear, and the outer surface of the ring gear is meshedly connected to a gear.

[0013] As a further improvement of the present invention, a motor is fixedly connected to the upper surface of the separation tank, and the output shaft end of the motor passes through the separation tank and is fixedly connected to the gear.

[0014] As a further improvement of the present invention, the oil suction part includes a disc fixedly connected to the outer surface of the rotating sleeve, a plurality of circular holes are evenly opened on the disc, an oil suction rod is installed in the inner cavity of the circular hole, the upper end of the oil suction rod is fixedly connected to a connecting plate, the connecting plate is fixedly connected to the outer surface of the rotating sleeve, two mounting plates are symmetrically fixedly connected to the upper surface of the disc, an electric push rod is fixedly connected to the lower surface of the mounting plate, and the lower end of the electric push rod is fixedly connected to the upper surface of the connecting plate.

[0015] A high-efficiency cooling method for a Freon refrigerator comprises the following steps: S1: liquid refrigerant enters an evaporator after being throttled by an electronic expansion valve, absorbs heat from natural gas in a pipeline and gradually evaporates into a gaseous state, the refrigerant gas exits the evaporator and enters a compressor for compression, the compressed high-temperature and high-pressure refrigerant gas carries a large amount of lubricating oil and enters an oil separator to separate oil droplets, the high-temperature and high-pressure gaseous refrigerant with the oil droplets removed enters an evaporative condenser for condensation, then flows into a siphon tank, further cools and stabilizes the temperature before flowing into a liquid storage tank for storage, then flows into an economizer for supercooling, and is throttled and depressurized by an electronic expansion valve to transform into a low-temperature and low-pressure two-phase state (liquid + gaseous mixture), and returns to the evaporator to complete the cycle.

[0016] S2: A spiral blade is installed inside the intake pipe. The gas flows along the spiral path, generating a strong centrifugal force, causing the heavier oil droplets to be thrown to the inner wall of the intake pipe. The gas is injected into the oily absorption medium at the bottom of the separation tank through the intake pipe and is quickly absorbed or dissolved. The oil suction rod effectively adsorbs and collects the oil droplets in the gas. The motor drives the gear to rotate, driving the ring gear and the rotating sleeve to rotate, driving multiple oil suction rods to rotate. The oil droplets attached to the surface of the oil suction rod are affected by the centrifugal force and are thrown to the inner wall of the separation tank. The annular memory alloy is heated and activated by the electric heating wire, causing it to deform and shrink to fit tightly against the outer surface of the oil suction rod. At this time, the electric push rod is started to drive the connecting plate and the oil suction rod to move upward, and the residual oil droplets accumulated on the oil suction rod are scraped off by the deformed annular memory alloy.

[0017] Compared with the prior art, the advantages of the present invention are as follows: (1) In this scheme, the liquid refrigerant enters the evaporator after being throttled by the electronic expansion valve, absorbs heat from the natural gas and gradually evaporates into gas. The electronic expansion valve accurately adjusts the amount of refrigerant entering the evaporator based on the temperature feedback of the sensor at the evaporator outlet, reduces superheat loss, and improves the overall efficiency of the system. After the refrigerant gas comes out of the evaporator, it enters the first compression section of the semi-enclosed compressor, is compressed to a certain pressure, and then passes through the intercooler to cool down, and then enters the second compression section to further increase the pressure. In this way, the compression ratio can be effectively reduced and energy consumption can be reduced. The high-temperature and high-pressure refrigerant gas after compression carries a large amount of lubricating oil through the air inlet pipe and enters the separation tank. The lubricating oil is removed. The high-temperature and high-pressure gaseous refrigerant after the oil droplets are removed enters the evaporative condenser for condensation. The condensed liquid refrigerant flows into the siphon tank, where it is further cooled to stabilize the temperature during the process, and then flows into the economizer for supercooling, and is throttled and reduced in pressure by the electronic expansion valve, converted into a low-temperature and low-pressure two-phase state, and returns to the evaporator to complete the cycle.

[0018] (2) This solution installs a spiral blade inside the intake pipe, so that the gas is forced to flow along a spiral path, generating a strong centrifugal force, causing the heavier oil droplets to be thrown to the inner wall of the intake pipe, and begin to flow downward due to gravity, and gradually gather at the bottom of the separation tank. The gas is injected into the oily absorption medium at the bottom of the separation tank through the intake pipe, and is fully mixed and contacted with the surrounding oily absorption medium. The oil droplets are captured and dissolved in the oily absorption medium. Compared with traditional physical separation methods, this method can more thoroughly remove oil droplets from the gas.

[0019] (3) This solution guides the direction of the air flow through a gradually shrinking conical air guide cover, so that the air flow flows upward along the middle position. The gas flows upward through the gap between the circular hole on the disc and the oil suction rod and is discharged through the exhaust pipe. Only gas can pass through the gap between the circular hole and the oil suction rod, while oil is prevented from passing through. When the gas passes through the gap, it must contact the outer surface of the oil suction rod, which can effectively absorb and collect oil droplets in the gas. The oil suction rod extends outside the disc, increasing the contact area with the gas and improving the efficiency of capturing tiny oil droplets. The rotation of the rotating sleeve drives multiple oil suction rods to rotate. During the rotation process, the oil droplets attached to the surface of the oil suction rod are affected by centrifugal force and are thrown to the inner wall of the separation tank, and finally It flows into the bottom of the separation tank and actively throws out the oil droplets adsorbed on the oil suction rod to avoid saturation and failure of the oil absorption material. The annular memory alloy is activated by heating with an electric heating wire, causing it to deform and shrink and fit tightly against the outer surface of the oil suction rod. At this time, the electric push rod is started to drive the connecting plate and the oil suction rod to move upward. The residual oil droplets accumulated on the oil suction rod are scraped off by the deformed annular memory alloy to achieve self-cleaning function, ensure complete separation of refrigerant gas and oil droplets, avoid accumulation of lubricating oil inside the evaporative condenser to form an oil film, reduce heat exchange loss caused by the oil film, and good oil separation can maintain the working parameters of each part of the system within a more stable range, which is conducive to long-term stable operation of the system and reduce the occurrence of failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic structural diagram of the oil separator of the present invention.

[0022] Figure 3 It is a half-section schematic diagram of the internal structure of the oil separator of the present invention.

[0023] Figure 4 It is a schematic diagram of the partial structure of the oil separator of the present invention.

[0024] Figure 5 It is a schematic diagram of the ring-shaped memory alloy structure of the present invention.

[0025] Explanation of the numbers in the figure: 1. Evaporator; 2. Semi-hermetic compressor; 3. Oil separator; 301. Separation tank; 302. Support leg; 303. Inlet pipe; 304. Exhaust pipe; 305. Spiral blade; 306. Air guide cover; 307. Oil drain pipe; 3071. Valve; 308. Rotating part; 3081. Rotating sleeve; 3082. Ring gear; 3083. Gear; 3084. Motor; 309. Oil suction part; 3091. Disc; 3092. Round hole; 3093. Oil suction rod; 3094. Connecting plate; 3095. Mounting plate; 3096. Electric push rod; 3097. Annular shape memory alloy; 3098. Electric heating wire; 4. Evaporative condenser; 5. Siphon tank; 6. Liquid storage tank. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work shall fall within the scope of protection of the present invention.

[0027] Example 1: Please refer to Figure 1-Figure 5 A high-efficiency cooling system for a Freon refrigerator includes an evaporator 1, a semi-hermetic compressor 2 is installed at one end of the evaporator 1, an oil separator 3 is installed at one end of the semi-hermetic compressor 2, an evaporative condenser 4 is installed at one end of the oil separator 3, a siphon tank 5 is installed at one end of the evaporative condenser 4, a liquid storage tank 6 is installed at one end of the siphon tank 5, an electronic expansion valve is installed at the inlet of the evaporator 1, and a temperature sensor is installed at the outlet of the evaporator 1.

[0028] Specifically, the output end of the evaporator 1 is connected to the input end of the semi-hermetic compressor 2 through a pipeline, the output end of the semi-hermetic compressor 2 is connected to the input end of the oil separator 3 through a pipeline, the output end of the evaporative condenser 4 is connected to the input end of the siphon tank 5 through a pipeline, the output end of the siphon tank 5 is connected to the input pipe of the liquid storage tank 6 through a pipeline, a safety valve is installed on the liquid storage tank 6, the output end of the liquid storage tank 6 is connected to the economizer through a pipeline, the output end of the economizer is connected to the input end of the evaporator 1 through a pipeline to form a circulation, and the evaporator 1, the semi-hermetic compressor 2, the oil separator 3, the evaporative condenser 4, the siphon tank 5 and the liquid storage tank 6 are electrically connected through wires.

[0029] Furthermore, the liquid refrigerant (R507a) enters the parallel pipes in the evaporator 1 after being throttled by the electronic expansion valve, and absorbs heat from the natural gas in the pipes and gradually evaporates into gas. A countercurrent heat exchange design is adopted, so that the temperature difference between the refrigerant and the natural gas remains at a high level throughout the heat exchange process, thereby improving the heat exchange efficiency. The electronic expansion valve accurately adjusts the amount of refrigerant entering the evaporator based on the temperature feedback from the sensor at the evaporator outlet, ensuring that the evaporation process is carried out under optimal conditions, reducing superheat loss, and improving the overall efficiency of the system. The evaporator 1 is usually composed of multiple parallel pipes. The refrigerant (R507a) flows inside these pipes, and the outside of these pipes exchanges heat with the natural gas. In order to improve the heat exchange efficiency, a fin design may also be used inside the evaporator to increase the contact area.

[0030] After exiting the evaporator 1, the refrigerant gas enters the first compression section of the semi-hermetic compressor 2. After being compressed to a certain pressure, it passes through an intercooler to cool down the temperature, and then enters the second compression section to further increase the pressure. In this way, the compression ratio can be effectively reduced, and energy consumption can be reduced. During the compression process, lubricating oil is mixed with the refrigerant to lubricate and help dissipate heat. (Compressor 2 is a semi-hermetic single-unit bipolar screw compressor with two compression stages, the first and second stages. An intercooler is provided between each stage to balance the interstage pressure, and a lubricating oil system is equipped to ensure the normal operation of the compressor).

[0031] The compressed high-temperature and high-pressure refrigerant gas carries a large amount of lubricating oil and enters the oil separator 3 for oil and gas separation. After the oil droplets are removed, the high-temperature and high-pressure gaseous refrigerant enters the evaporative condenser 4, and the cold water sprayed by the spray system contacts it to exchange heat. At the same time, the fan accelerates air circulation and promotes water evaporation, thereby effectively lowering the temperature of the refrigerant until it is completely condensed into a liquid state and enters the condensing coil. The evaporative condenser 4 includes a spray system, a packing layer, a fan assembly and other parts. It uses water evaporation to take away heat to cool the refrigerant. The evaporative condenser 4 is equipped with a water tank and a circulation pump to circulate the sprayed cold water.

[0032] The condensed liquid refrigerant flows into the siphon tank 5, where it is further cooled and stabilized during the process. The siphon tank 5 is a sealed container with a liquid level gauge inside to monitor the refrigerant level. After the liquid refrigerant temperature stabilizes, it flows into the liquid storage tank 6 for storage. The liquid storage tank 6 is used to store a sufficient amount of liquid refrigerant and is equipped with a safety valve to prevent overpressure. It not only serves as a storage function but also buffers pressure fluctuations when the system load changes, ensuring the stable operation of the entire refrigeration system. The condensed liquid refrigerant flows into the economizer for subcooling. This is a device specially designed to further cool the refrigerant. The economizer usually uses the low-temperature, low-pressure gas refrigerant coming out of the evaporator as the cooling medium to additionally cool the liquid refrigerant about to enter the evaporator, reducing its temperature to below the condensing temperature. This process is called "subcooling". The supercooled liquid refrigerant has a lower temperature, which means it can absorb heat more effectively in the evaporator 1, improving the refrigeration efficiency. It is throttled and reduced in pressure by the electronic expansion valve, converted into a low-temperature, low-pressure two-phase liquid + gas mixture, and returns to the evaporator 1 to complete the cycle.

[0033] After the system is powered on, the semi-hermetic compressor 2, the oil separator 3 motor, and the evaporative condenser 4 are started in sequence through the PLC system. The electronic expansion valve sets the initial opening according to the evaporation temperature. The temperature sensor provides real-time feedback on parameters such as the evaporator outlet temperature and the condensing pressure. The connecting pipes in the device are all made of high-pressure copper pipes to ensure sealing.

[0034] Example 2: Please refer to Figure 1-Figure 5 , an efficient cooling system and method for a Freon refrigerator, further comprising an oil separator 3, including a separation tank 301 located between a semi-hermetic compressor 2 and an evaporative condenser 4, an air inlet pipe 303 fixedly connected to the middle of an inner cavity of the separation tank 301, an exhaust pipe 304 communicated with an upper portion of an outer surface of the separation tank 301, an oil drain pipe 307 communicated with a lower portion of an outer surface of the separation tank 301, a spiral sheet 305 fixedly connected to an inner cavity of the air inlet pipe 303, an air guide cover 306 fixedly connected to the lower portion of the inner cavity of the separation tank 301, a rotating member 308 rotatably connected to an outer surface of the air inlet pipe 303, and an oil suction member 309 mounted on an outer surface of the rotating member 308.

[0035] Specifically, one end of the air inlet pipe 303 located outside the separation tank 301 is connected to the output end of the semi-enclosed compressor 2, and the exhaust pipe 304 is connected to the input end of the siphon tank 5. The rotating member 308 includes a rotating sleeve 3081 rotatably connected to the outer surface of the air inlet pipe 303, and the outer surface of the upper end of the rotating sleeve 3081 is fixedly connected to the outer surface of the gear ring 3082. The outer surface of the gear ring 3082 is meshed with a gear 3083. The upper surface of the separation tank 301 is fixedly connected to the motor 3084, and the output shaft end of the motor 3084 passes through the separation tank 301 and is fixedly connected to the gear 3083. The oil suction member 308 9 includes a disc 3091 fixedly connected to the outer surface of the rotating sleeve 3081, a plurality of circular holes 3092 are evenly opened on the disc 3091, an oil suction rod 3093 is installed in the inner cavity of the circular hole 3092, the upper end of the oil suction rod 3093 is fixedly connected to a connecting plate 3094, the connecting plate 3094 is fixedly connected to the outer surface of the rotating sleeve 3081, two mounting plates 3095 are symmetrically fixedly connected to the upper surface of the disc 3091, the lower surface of the mounting plate 3095 is fixedly connected to an electric push rod 3096, and the lower end of the electric push rod 3096 is fixedly connected to the upper surface of the connecting plate 3094.

[0036] Furthermore, the compressed high-temperature and high-pressure refrigerant gas carries a large amount of lubricating oil and enters the separation tank 301 through the air inlet pipe 303. A spiral blade 305 is installed inside the air inlet pipe 303. Due to the shape design of the spiral blade 305, the gas is forced to flow along a spiral path. This flow mode causes the gas to generate a strong centrifugal force, causing the heavier oil droplets to be thrown to the inner wall of the air inlet pipe 303. The oil droplets thrown to the inner wall begin to flow downward due to gravity, and gradually gather at the bottom of the separation tank 301, and mix with the oily absorption medium at the bottom of the separation tank 301.

[0037] The gas is injected into the oily absorption medium at the bottom of the separation tank 301 through the air inlet pipe 303. The oily absorption medium is usually made of an oleophilic material (such as mineral oil or other liquids that efficiently absorb oil products, which can effectively capture and dissolve oil droplets in the gas). The gas entering the oily absorption medium will move upward due to buoyancy, forming a large number of tiny bubbles. During the upward process, the gas will fully mix and contact with the surrounding oily absorption medium and will be quickly absorbed or dissolved by the oily absorption medium. Compared with traditional physical separation methods, this method can more thoroughly remove oil droplets in the gas.

[0038] The gas after the oil droplets are removed is guided by the gradually shrinking conical air guide 306 so that the gas flows upward along the middle position, flows upward through the gap between the circular hole 3092 on the disk 3091 and the oil suction rod 3093, and is discharged through the exhaust pipe 304. The gap between the circular hole 3092 and the oil suction rod 3093 allows only gas to pass through, while preventing oil from passing through. (It is recommended that the gap be between 10-50 microns. Liquids such as oil generally have a higher viscosity than gases, which means that they have a harder time passing through small holes or gaps. When liquids contact a solid boundary, they form a certain curvature radius, which is determined by surface tension. For smaller openings, liquids may not be able to pass through due to surface tension. For most mineral oils, when the pore size is less than about 10 microns, the liquid will have difficulty penetrating due to the effect of surface tension; for some lighter oils, this value may be higher than 50 microns. Slightly larger, but usually not more than 50 microns) When the gas passes through the gap, it must come into contact with the outer surface of the oil suction rod 3093. The oil suction rod 3093 is made of oleophilic material (such as polypropylene fiber, hydrophobic oleophilic resin coating, etc.), which can effectively absorb and collect oil droplets in the gas. The oil suction rod 3093 extends outside the disc 3091, which increases the contact area with the gas and improves the efficiency of capturing tiny oil droplets. At the same time, the motor 3084 drives the gear 3083 to rotate, driving the ring gear 3082 and the rotating sleeve 3081 to rotate and drive multiple oil suction rods 3093 to rotate. During the rotation process, the oil droplets attached to the surface of the oil suction rod 3093 are affected by centrifugal force and are thrown to the inner wall of the separation tank 301, and finally flow into the bottom of the separation tank 301, actively throwing out the oil droplets adsorbed on the oil suction rod 3093, avoiding saturation failure of the oil absorption material and improving long-term operation stability.

[0039] The oil absorption medium at the bottom is separated by the air guide hood 306. At this time, the gas flowing upward from the middle and the oil droplets falling downward from the surrounding form two flow paths to prevent the oil droplets flowing downward from remixing with the gas. When the oil layer accumulates on the surface of the oil suction rod 3093, the annular memory alloy 3097 is activated by the electric heating wire to deform and shrink and adhere to the outer surface of the oil suction rod 3093. At this time, the electric push rod 3096 is started to drive the connecting plate 3094 and the oil suction rod 3093 to move upward, and the residual oil droplets accumulated on the oil suction rod 3093 are scraped off by the deformed annular memory alloy 3097, realizing self-cleaning. The cleaning function ensures that the refrigerant gas and the oil droplets are completely separated, and the lubricating oil is prevented from accumulating inside the evaporative condenser 4 to form an oil film, thereby reducing the heat exchange loss caused by the oil film and improving the energy efficiency ratio. This means that a better cooling effect can be obtained under the same power consumption, or the energy consumption required to achieve the same cooling effect is lower. Good oil separation can maintain the working parameters of each part in the system within a more stable range, which helps the system to operate stably for a long time and reduce the occurrence of failures. The recovered oil droplets separated by the air guide cover 306 can be automatically discharged by opening the valve 3071 on the oil drain pipe 307.

[0040] Working principle: During the use of the device, the liquid refrigerant (R507a) enters the parallel pipe in the evaporator 1 after being throttled by the electronic expansion valve, and absorbs heat from the natural gas in the pipe and gradually evaporates into gas. The countercurrent heat exchange design is adopted, so that the temperature difference between the refrigerant and the natural gas is maintained at a high level during the entire heat exchange process, thereby improving the heat exchange efficiency. The electronic expansion valve accurately adjusts the amount of refrigerant entering the evaporator according to the temperature feedback of the sensor at the evaporator outlet to ensure that the evaporation process is carried out under optimal conditions. After the refrigerant gas comes out of the evaporator 1, it enters the first compression section of the semi-hermetic compressor 2, is compressed to a certain pressure, and then passes through the intercooler to cool down, and then enters the second compression section to further increase the pressure. In this way The compression ratio can be effectively reduced, and energy consumption can be reduced. During the compression process, the lubricating oil is mixed with the refrigerant, which plays a lubricating role and also helps to dissipate heat. The compressed high-temperature and high-pressure refrigerant gas carries a large amount of lubricating oil and enters the separation tank 301 through the intake pipe 303. A spiral blade 305 is installed inside the intake pipe 303. Due to the shape design of the spiral blade 305, the gas is forced to flow along a spiral path. This flow mode causes the gas to generate a strong centrifugal force, causing the heavier oil droplets to be thrown to the inner wall of the intake pipe 303. The oil droplets thrown to the inner wall begin to flow downward due to gravity and gradually gather at the bottom of the separation tank 301, and mix with the oily absorption medium at the bottom of the separation tank 301. The gas is injected into the separation tank 301 through the intake pipe 303. 01 In the oily absorption medium at the bottom, the oily absorption medium is usually made of oleophilic material, which can effectively capture and dissolve oil droplets in the gas. Compared with the traditional physical separation method, this method can more thoroughly remove oil droplets in the gas. The gas after the oil droplets are removed guides the airflow direction through the gradually shrinking conical air guide hood 306, so that the airflow flows upward along the middle position, and the gas flows upward through the gap between the circular hole 3092 on the disc 3091 and the oil suction rod 3093, and is discharged through the exhaust pipe 304. Only gas can pass through the gap between the circular hole 3092 and the oil suction rod 3093, and oil is prevented from passing through. When the gas passes through the gap, it must contact the outer surface of the oil suction rod 3093, which can effectively adsorb and collect the oil in the gas. The oil suction rod 3093 extends outside the disc 3091, which increases the area of contact with the gas and improves the efficiency of capturing tiny oil droplets. At the same time, the motor 3084 drives the gear 3083 to rotate, driving the gear ring 3082 and the rotating sleeve 3081 to rotate, driving multiple oil suction rods 3093 to rotate. During the rotation, the oil droplets attached to the surface of the oil suction rod 3093 are affected by the centrifugal force and are thrown to the inner wall of the separation tank 301, and finally flow into the bottom of the separation tank 301, actively throwing out the oil droplets adsorbed on the oil suction rod 3093, avoiding saturation failure of the oil absorption material and improving long-term operation stability. At this time, the gas flowing upward from the middle and the oil droplets thrown downward from the surroundings form two flow paths, avoiding the re-mixing of the downward-flowing oil droplets with the gas.When the oil layer accumulates on the surface of the oil suction rod 3093, the annular memory alloy 3097 is activated by heating with an electric heating wire, causing it to deform and shrink so as to fit tightly against the outer surface of the oil suction rod 3093. At this time, the electric push rod 3096 is started to drive the connecting plate 3094 and the oil suction rod 3093 to move upward, and the residual oil droplets accumulated on the oil suction rod 3093 are scraped off by the deformed annular memory alloy 3097, thereby realizing a self-cleaning function, ensuring that the refrigerant gas and the oil droplets are completely separated, and preventing the lubricating oil from accumulating inside the evaporative condenser 4 to form an oil film, thereby reducing the heat exchange loss caused by the oil film, and after the high-temperature and high-pressure gaseous refrigerant with the oil droplets removed enters the evaporative condenser 4, it is sprayed with The cold water sprayed down by the shower system contacts the refrigerant, creating a heat exchange. Meanwhile, the fan accelerates air circulation and promotes water evaporation, effectively lowering the refrigerant's temperature until it completely condenses into a liquid state. The condensed liquid refrigerant flows into the siphon tank 5, where it is further cooled and stabilized during this process. After the liquid refrigerant's temperature stabilizes, it flows into the liquid storage tank 6 for storage. The liquid storage tank 6 is used to store a sufficient amount of liquid refrigerant and is equipped with a safety valve to prevent overpressure. The condensed liquid refrigerant flows into the economizer for supercooling, improving refrigeration efficiency. It is then throttled and reduced in pressure by the electronic expansion valve, transforming into a low-temperature, low-pressure, two-phase liquid and gas mixture, which returns to the evaporator 1 to complete the cycle.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive.

[0042] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An efficient cooling system for a Freon refrigerator, characterized by: include: An evaporator (1), wherein a semi-hermetic compressor (2) is installed at one end of the evaporator (1), an oil separator (3) is installed at one end of the semi-hermetic compressor (2), an evaporative condenser (4) is installed at one end of the oil separator (3), a siphon tank (5) is installed at one end of the evaporative condenser (4), a liquid storage tank (6) is installed at one end of the siphon tank (5), an electronic expansion valve is installed at the inlet of the evaporator (1), and a temperature sensor is installed at the outlet of the evaporator (1); The oil separator (3) comprises a separation tank (301) located between the semi-hermetic compressor (2) and the evaporative condenser (4), wherein an air inlet pipe (303) is fixedly connected to the middle of the inner cavity of the separation tank (301), an exhaust pipe (304) is communicated with the upper portion of the outer surface of the separation tank (301), an oil drain pipe (307) is communicated with the lower portion of the outer surface of the separation tank (301), a spiral sheet (305) is fixedly connected to the inner cavity of the air inlet pipe (303), an air guide cover (306) is fixedly connected to the lower portion of the inner cavity of the separation tank (301), a rotating member (308) is rotatably connected to the outer surface of the air inlet pipe (303), and an oil suction member (309) is mounted on the outer surface of the rotating member (308).

2. The high-efficiency cooling system for a Freon refrigerator according to claim 1, characterized in that: The output end of the evaporator (1) is connected to the input end of the semi-hermetic compressor (2) through a pipeline, and the output end of the semi-hermetic compressor (2) is connected to the input end of the oil separator (3) through a pipeline.

3. The high-efficiency cooling system for a Freon refrigerator according to claim 1, characterized in that: The output end of the evaporative condenser (4) is connected to the input end of the siphon tank (5) via a pipeline, and the output end of the siphon tank (5) is connected to the input pipe of the liquid storage tank (6) via a pipeline.

4. The high-efficiency cooling system for a Freon refrigerator according to claim 1, characterized in that: A safety valve is installed on the liquid storage tank (6), and the output end of the liquid storage tank (6) is connected to an economizer through a pipeline. The output end of the economizer is connected to the input end of the evaporator (1) through a pipeline to form a circulation.

5. The high-efficiency cooling system for a Freon refrigerator according to claim 1, characterized in that: The evaporator (1), the semi-enclosed compressor (2), the oil separator (3), the evaporative condenser (4), the siphon tank (5) and the liquid storage tank (6) are electrically connected via wires.

6. The high-efficiency cooling system for a Freon refrigerator according to claim 1, characterized in that: One end of the air inlet pipe (303) located outside the separation tank (301) is connected to the output end of the semi-enclosed compressor (2), and the exhaust pipe (304) is connected to the input end of the siphon tank (5).

7. The high-efficiency cooling system for a Freon refrigerator according to claim 1, characterized in that: The rotating member (308) comprises a rotating sleeve (3081) rotatably connected to the outer surface of the air intake pipe (303); a gear ring (3082) is fixedly connected to the outer surface of the upper end of the rotating sleeve (3081); and a gear (3083) is meshedly connected to the outer surface of the gear ring (3082).

8. The high-efficiency cooling system for a Freon refrigerator according to claim 7, characterized in that: A motor (3084) is fixedly connected to the upper surface of the separation tank (301), and an output shaft end of the motor (3084) passes through the separation tank (301) and is fixedly connected to the gear (3083).

9. The high-efficiency cooling system for a Freon refrigerator according to claim 8, characterized in that: The oil suction member (309) comprises a disc (3091) fixedly connected to the outer surface of the rotating sleeve (3081), a plurality of circular holes (3092) are evenly opened on the disc (3091), an oil suction rod (3093) is installed in the inner cavity of the circular hole (3092), the upper end of the oil suction rod (3093) is fixedly connected to a connecting plate (3094), the connecting plate (3094) is fixedly connected to the outer surface of the rotating sleeve (3081), two mounting plates (3095) are symmetrically fixedly connected to the upper surface of the disc (3091), the lower surface of the mounting plate (3095) is fixedly connected to an electric push rod (3096), and the lower end of the electric push rod (3096) is fixedly connected to the upper surface of the connecting plate (3094).

10. A high-efficiency cooling method for a Freon refrigerator, comprising the high-efficiency cooling system for a Freon refrigerator according to any one of claims 1 to 9, characterized in that: The following steps are included: S1: Liquid refrigerant enters the evaporator (1) after being throttled by the electronic expansion valve, and absorbs heat from the natural gas in the pipeline and gradually evaporates into gas. After the refrigerant gas comes out of the evaporator (1), it enters the compressor (2) for compression. The compressed high-temperature and high-pressure refrigerant gas carries a large amount of lubricating oil and enters the oil separator (3) to separate the oil droplets. After the oil droplets are removed, the high-temperature and high-pressure gaseous refrigerant enters the evaporative condenser (4) for condensation, and then flows into the siphon tank (5). After further cooling and stabilizing the temperature, it flows into the liquid storage tank (6) for storage, and then flows into the economizer for supercooling. It is throttled and depressurized by the electronic expansion valve, and converted into a low-temperature and low-pressure two-phase state (liquid + gas mixture), and returns to the evaporator (1) to complete the cycle; S2: A spiral blade (305) is installed inside the air intake pipe (303). The gas flows along the spiral path, generating a strong centrifugal force, causing the heavier oil droplets therein to be thrown toward the inner wall of the air intake pipe (303). The gas is injected into the oily absorption medium at the bottom of the separation tank (301) through the air intake pipe (303) and is quickly absorbed or dissolved. The oil suction rod (3093) effectively absorbs and collects the oil droplets in the gas. The motor (3084) drives the gear (3093) to rotate the drive ring gear (3082) and the rotating sleeve (3081) to rotate the belt. The multiple oil suction rods (3093) are driven to rotate, and the oil droplets attached to the surface of the oil suction rods (3093) are subjected to the centrifugal force and are thrown toward the inner wall of the separation tank (301). The annular memory alloy (3097) is activated by heating with an electric heating wire, causing it to deform and shrink so as to adhere closely to the outer surface of the oil suction rods (3093). At this time, the electric push rod (3096) is started to drive the connecting plate (3094) and the oil suction rods (3093) to move upward, and the residual oil droplets accumulated on the oil suction rods (3093) are scraped off by the deformed annular memory alloy (3097).

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