An energy-efficient screw air compressor and its usage method

Abstract

The present invention belongs to the technical field of screw air compressors, and specifically relates to an energy-efficient screw air compressor and its usage method; it includes a chassis and a body. The body is fixedly installed inside the chassis. A temperature controller is installed at the bottom of the inner cavity of the chassis. A U-shaped tube is embedded in the inner cavity of the temperature controller. Both ends of the U-shaped tube are bent. The two ends of the U-shaped tube are respectively communicated with an oil drain pipe and an oil inlet pipe. The oil drain pipe is located below the oil inlet pipe. On the side of the U-shaped tube away from the oil drain pipe, an oil circuit branch pipe one and an oil circuit branch pipe two are communicated in sequence from bottom to top; through the cooperation of multiple annular tubes one and the annular heat dissipation plate, the present invention can divide the flowing lubricating oil, so that the lubricating oil presents a thin layer when flowing in the annular heat dissipation plate. While increasing the contact area between the annular heat dissipation plate and the wind blown by the fan, it is convenient for the wind to take away the heat of the lubricating oil in the annular heat dissipation plate, achieving the effect of rapid cooling.

Description

Technical Field

[0001] The present invention belongs to the technical field of screw air compressors, in particular to a high-efficiency energy-saving screw air compressor and a method for using the same. Background Art

[0002] A screw compressor, also known as a rotary screw air compressor, is a type of air compressor that boosts gas pressure through the mechanical movement of a master and slave screw. The basic structure of a screw compressor consists of a pair of intermeshing helical rotors arranged in parallel within the compressor body. The rotor with convex teeth is called the male rotor or male screw, while the rotor with concave teeth within its pitch circle is called the female rotor or female screw. The male rotor is typically connected to the prime mover, driving the female rotor.

[0003] In the prior art, in order to maintain the normal operating temperature of the air compressor, the proportion of lubricating oil entering the radiator is generally adjusted through a temperature control valve to control the exhaust temperature of the machine head. However, the heat dissipation effect and function of the oil circuit radiator in the traditional air compressor are relatively simple. As a result, when the oil temperature is too high, even if the proportion of lubricating oil passing through the radiator can be adjusted, the oil temperature still cannot be cooled quickly, resulting in low cooling efficiency of the lubricating oil, which in turn causes the air compressor components to overheat, resulting in a reduction in the overall efficiency of the system. In severe cases, the air compressor may trip due to high temperature, which has a great impact on the normal operation of the system.

[0004] To this end, the present invention provides a high-efficiency energy-saving screw air compressor and a method of using the same. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the problem in the prior art that, in order to maintain the normal operating temperature of the air compressor, the proportion of lubricating oil entering the radiator is generally adjusted by a temperature control valve to control the exhaust temperature of the machine head. However, the heat dissipation effect and function of the oil circuit radiator in the traditional air compressor are relatively simple, resulting in that when the oil temperature is too high, even if the proportion of lubricating oil passing through the radiator can be adjusted, the oil temperature still cannot be cooled quickly, resulting in low cooling efficiency of the lubricating oil, which in turn causes the components of the air compressor to overheat, resulting in reduced overall efficiency of the system. In severe cases, the air compressor may trip due to high temperature, which greatly affects the normal operation of the system. The present invention proposes an efficient and energy-saving screw air compressor and a method for using the same.

[0006] The technical solution applicable to solving the technical problems of the present invention is as follows: An energy-efficient screw air compressor described in the present invention includes a chassis and a body. The body is fixedly installed inside the chassis. A temperature controller is installed at the bottom of the inner cavity of the chassis. A U-shaped tube is embedded in the inner cavity of the temperature controller. Both ends of the U-shaped tube are bent. An oil drain pipe and an oil inlet pipe are respectively connected to both ends of the U-shaped tube. The oil drain pipe is located below the oil inlet pipe. An oil circuit branch pipe 1 and an oil circuit branch pipe 2 are sequentially connected to the side of the U-shaped tube far from the oil drain pipe from bottom to top. An oil circuit heat dissipation component is provided in the inner cavity of the chassis. The oil circuit heat dissipation component is connected to both the oil circuit branch pipe 1 and the oil circuit branch pipe 2. A valve 1 is fixedly installed on the side of the U-shaped tube far from the oil drain pipe. The valve 1 is located between the oil circuit branch pipe 1 and the oil circuit branch pipe 2. A valve 2 is fixedly installed at one end of the oil circuit branch pipe 1 close to the temperature controller. A valve 3 is fixedly installed at one end of the oil circuit branch pipe 2 close to the temperature controller. A temperature sensor is fixedly installed at one end of the U-shaped tube close to the oil drain pipe.

[0007] Preferably, the oil circuit heat dissipation component includes a circular tube 1, a circular heat dissipation plate, and a fan. Two fans are fixedly installed on the top of the chassis. An air duct is fixedly connected to the inner wall of the chassis. The air duct is adapted to one of the fans. A plurality of circular heat dissipation plates are provided in the air duct. The diameters of the plurality of circular heat dissipation plates increase in sequence. Circular tubes 1 are provided above and below the plurality of circular heat dissipation plates. The circular tube 1 is connected to the inner cavity of the circular heat dissipation plate through a plurality of thin tubes 1. One end of the oil circuit branch pipe 1 far from the U-shaped tube is connected to the circular tube 1 below the plurality of circular heat dissipation plates. One end of the oil circuit branch pipe 2 far from the U-shaped tube is connected to the circular tubes 1 above the plurality of circular heat dissipation plates.

[0008] Preferably, circular cold water plates are fixedly connected to both sides of the circular heat dissipation plate. A cold water cavity is formed between the circular cold water plate and the circular heat dissipation plate. Circular tubes 2 are provided above and below the circular cold water plate. The circular tube 2 is connected to the cold water cavity through a thin tube 2. The circular tubes 2 below the circular cold water plate are all connected to a water outlet pipe. The circular tubes 2 above the circular cold water plate are all connected to a water inlet pipe. A water pipe radiator is installed on the outer wall of the air duct. The water pipe radiator is adapted to one of the fans. One end of the water outlet pipe far from the circular tube 2 is connected to a connecting pipe 1. A water pump is installed at the bottom of the inner cavity of the chassis. One end of the connecting pipe 1 far from the water outlet pipe is connected to the water pump. The water pipe radiator is connected to the water pump. One end of the water inlet pipe far from the circular tube 2 is fixedly connected to a connecting pipe 2. The connecting pipe 2 is connected to the water pipe radiator.

[0009] Preferably, the water pipe radiator is composed of a plurality of horizontal spiral tubes and a U-shaped connecting pipe. The water pump is fixedly connected to the lowest spiral tube inside the water pipe radiator. The connecting pipe 2 is fixedly connected to the highest spiral tube inside the water pipe radiator.

[0010] Preferably, annular heat dissipation fins are fixedly connected to the outer walls on both sides of the annular heat dissipation plate. The ends of the annular heat dissipation fins away from the annular heat dissipation plate extend to the outside of the annular cold water plate, and the fins on the annular heat dissipation fins are distributed in a staggered manner.

[0011] Preferably, a mounting plate is fixedly connected to the inner wall of the air duct. The mounting plate is located above the second oil path branch pipe. A motor is fixedly installed on the top of the mounting plate. The output end of the motor is fixedly connected to a rotating shaft. A first gear is fixedly connected to the rotating shaft. A second gear is meshed and connected to one side of the first gear. A rotating rod is fixedly connected to the second gear. The bottom end of the rotating rod extends below the mounting plate and is fixedly connected to two support rods. Spray plates are provided on the sides of the annular cold water plate away from the annular heat dissipation plate. The spray plate close to the rotating rod is fixedly connected to the support rod. The spray plates are fixedly connected by a connecting rod. The top end of the rotating rod is rotatably connected to a water supply pipe. The water supply pipe is communicated with the inner cavity of the rotating rod. The inner cavity of the rotating rod is communicated with the inner cavity of the support rod. The inner cavity of the support rod is communicated with the inner cavity of the spray plate close to the rotating rod. The inner cavities of the spray plates are communicated with the inner cavity of the connecting rod.

[0012] Preferably, the spray area of the spray plate increases sequentially from the center of the air duct to the outside.

[0013] Preferably, a funnel-shaped groove is provided at the bottom of the inner cavity of the machine case. The funnel-shaped groove is located directly below the air duct. The area of the funnel-shaped groove is larger than the area of the bottom of the air duct. A drain pipe is fixedly connected to the bottom of the funnel-shaped groove. The end of the drain pipe away from the funnel-shaped groove extends to the outside of the machine case.

[0014] Preferably, an electric heater is fixedly installed at the end of the U-shaped pipe close to the oil inlet pipe.

[0015] A usage method of an energy-efficient screw air compressor, which is applicable to the above-mentioned energy-efficient screw air compressor, and the usage method includes the following steps:

[0016] S1: When the temperature of the lubricating oil is higher than the set normal temperature, valve one, valve two and valve three are opened simultaneously. A part of the lubricating oil directly flows from the U-shaped pipe into the oil inlet pipe, and another part of the lubricating oil enters the first oil path branch pipe from the U-shaped pipe, and after being cooled by the oil path heat dissipation component, it returns to the U-shaped pipe through the second oil path branch pipe again, and finally enters the oil inlet pipe and returns to the machine body;

[0017] S2: When the temperature sensor senses that the overall oil temperature is always higher than the set normal temperature, valve one is closed, valve two and valve three are opened, and all the lubricating oil entering the U-shaped pipe enters the oil path heat dissipation component for cooling, and finally returns to the U-shaped pipe from the second oil path branch pipe;

[0018] S3: When the temperature of the lubricating oil is still higher than the set temperature after all of it has passed through the oil circuit heat dissipation component, start the motor and connect an external water supply device through the water supply pipe, so that water flows through the rotating rod, the support rod, and the connecting rod in sequence, and finally sprays out from the spray plate, achieving re-cooling of the annular cold water plate and the annular heat sink, and further reducing the temperature of the lubricating oil.

[0019] S4: When the external temperature is relatively low and the temperature of the lubricating oil is still lower than the set temperature after passing through the screw compression friction, the electric heater can heat and raise the temperature of the lubricating oil passing through the U-shaped pipe.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. For the high-efficiency and energy-saving screw air compressor and its usage method described in the present invention, through the cooperation of multiple annular pipes one and the annular heat dissipation plate, the lubricating oil passing through can be shunted, so that the lubricating oil presents a thin layer when flowing in the annular heat dissipation plate. While increasing the contact area between the annular heat dissipation plate and the wind blown by the fan, it is convenient for the wind to take away the heat of the lubricating oil in the annular heat dissipation plate, achieving the effect of rapid cooling.

[0022] 2. For the high-efficiency and energy-saving screw air compressor and its usage method described in the present invention, by arranging annular cold water plates on both sides of the annular heat dissipation plate, and through the cooperation of the water pump with the water outlet pipe, the water inlet pipe, the connecting pipe one, the connecting pipe two, and the water pipe radiator, cold water can flow in the cold water cavity formed between the annular cold water plate and the annular heat dissipation plate, quickly taking away the heat of the lubricating oil in the annular heat dissipation plate. Description of the Drawings

[0023] The present invention will be further described below with reference to the drawings.

[0024] Figure 1 is the three-dimensional view of the whole of the present invention;

[0025] Figure 2 is the side view of the machine case of the present invention;

[0026] Figure 3 is the cross-sectional view at the temperature controller of the present invention;

[0027] Figure 4 is the partial cross-sectional view at the air duct of the present invention;

[0028] Figure 5 is Figure 4 the partial enlarged view at A in

[0029] Figure 6 is the exploded view of the water pipe radiator of the present invention;

[0030] Figure 7 is the schematic view of the annular pipe one of the present invention;

[0031] Figure 8 It is a schematic diagram of the mounting plate of the present invention;

[0032] Figure 9 It is a schematic diagram of the annular heat dissipation plate of the present invention;

[0033] Figure 10 It is a cross-sectional view of the annular cold water plate of the present invention;

[0034] Figure 11 It is a schematic diagram of the annular heat sink of the present invention;

[0035] In the figure: 1, chassis; 2, body; 3, oil drain pipe; 4, oil inlet pipe; 5, temperature controller; 6, U-shaped pipe; 7, oil circuit branch one; 8, oil circuit branch two; 9, valve one; 10, valve two; 11, valve three; 12, electric heater; 13, annular pipe one; 14, annular heat dissipation plate; 15, annular cold water plate; 16, water outlet pipe; 17, water inlet pipe; 18, annular pipe two; 19, connecting pipe one; 20, water pump; 21, water pipe radiator; 22, connecting pipe two; 23, annular heat sink; 24, mounting plate; 25, motor; 26, rotating shaft; 27, gear one; 28, gear two; 29, rotating rod; 30, support rod; 31, spraying plate; 32, connecting rod; 33, water supply pipe; 34, fan; 35, air duct; 36, funnel groove; 37, drain pipe. Specific embodiments

[0036] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0037] As Figures 1-11As shown in the figure, an energy-efficient screw air compressor according to an embodiment of the present invention includes a machine case 1 and a machine body 2. The machine body 2 is fixedly installed inside the machine case 1. A temperature controller 5 is installed at the bottom of the inner cavity of the machine case 1. A U-shaped tube 6 is embedded in the inner cavity of the temperature controller 5. Both ends of the U-shaped tube 6 are bent. The two ends of the U-shaped tube 6 are respectively connected to an oil drain pipe 3 and an oil inlet pipe 4. The oil drain pipe 3 is located below the oil inlet pipe 4. One side of the U-shaped tube 6 away from the oil drain pipe 3 is sequentially connected with an oil circuit branch pipe one 7 and an oil circuit branch pipe two 8 from bottom to top. An oil circuit heat dissipation component is provided in the inner cavity of the machine case 1. The oil circuit heat dissipation component is connected to both the oil circuit branch pipe one 7 and the oil circuit branch pipe two 8. A valve one 9 is fixedly installed on one side of the U-shaped tube 6 away from the oil drain pipe 3. The valve one 9 is located between the oil circuit branch pipe one 7 and the oil circuit branch pipe two 8. A valve two 10 is fixedly installed at one end of the oil circuit branch pipe one 7 close to the temperature controller 5. A valve three 11 is fixedly installed at one end of the oil circuit branch pipe two 8 close to the temperature controller 5. A temperature sensor is fixedly installed at one end of the U-shaped tube 6 close to the oil drain pipe 3. During operation, the oil drain pipe 3 conveys the lubricating oil after being compressed by the screw into the U-shaped tube 6 in the temperature controller 5. The temperature sensor on the U-shaped tube 6 senses the temperature of the lubricating oil in real time. When the temperature of the lubricating oil is higher than the set normal temperature, the valve one 9, the valve two 10 and the valve three 11 are opened simultaneously. A part of the lubricating oil directly flows from the U-shaped tube 6 into the oil inlet pipe 4. Another part of the lubricating oil enters the oil circuit branch pipe one 7 from the U-shaped tube 6, and after being cooled by the oil circuit heat dissipation component, it returns to the U-shaped tube 6 again through the oil circuit branch pipe two 8, and finally enters the oil inlet pipe 4 and returns to the machine body 2. The overall oil temperature of the lubricating oil can be reduced by mixing a part of the cooled lubricating oil. When the temperature sensor senses that the overall oil temperature is always higher than the set normal temperature, the valve one 9 is closed, and the valve two 10 and the valve three 11 are opened. All the lubricating oil entering the U-shaped tube 6 enters the oil circuit heat dissipation component for cooling, and finally returns to the U-shaped tube 6 through the oil circuit branch pipe two 8. The overall oil temperature of the lubricating oil can be quickly reduced by the oil circuit heat dissipation component, solving the problem in the prior art that in order to maintain the normal operating temperature of the air compressor, generally, the proportion of the lubricating oil entering the radiator is adjusted through a temperature control valve to control the exhaust temperature of the air head. However, the heat dissipation effect and function of the oil circuit radiator in the traditional air compressor are relatively single. When the oil temperature is too high, even if the proportion of the lubricating oil passing through the radiator can be adjusted, the oil temperature still cannot be quickly cooled, resulting in a low cooling efficiency of the lubricating oil. Furthermore, it will cause the components of the air compressor to overheat, leading to a reduction in the overall efficiency of the system. Seriously, the air compressor will trip due to high temperature, which has a great impact on the normal operation of the system.

[0038] The oil circuit heat dissipation component includes the first annular pipe 13, the annular heat dissipation plate 14 and the fan 34. Two fans 34 are fixedly installed on the top of the chassis 1. A wind tube 35 is fixedly connected to the inner wall of the chassis 1. The wind tube 35 is adapted to one of the fans 34. A plurality of annular heat dissipation plates 14 are provided in the wind tube 35. The diameters of the plurality of annular heat dissipation plates 14 increase in sequence. The first annular pipes 13 are provided above and below the plurality of annular heat dissipation plates 14. The first annular pipes 13 are connected to the inner cavities of the annular heat dissipation plates 14 through a plurality of first thin pipes. One end of the first oil circuit branch pipe 7 far from the U-shaped pipe 6 is connected to the first annular pipe 13 below the plurality of annular heat dissipation plates 14. One end of the second oil circuit branch pipe 8 far from the U-shaped pipe 6 is connected to the first annular pipes 13 above the plurality of annular heat dissipation plates 14. During operation, when the lubricating oil enters the first oil circuit branch pipe 7, the lubricating oil will enter the first annular pipes 13 below through the first oil circuit branch pipe 7, and enter the inner cavities of the annular heat dissipation plates 14 from the first annular pipes 13. Finally, it converges into the second oil circuit branch pipe 8 from the first annular pipes 13 above and returns to the U-shaped pipe 6 again. Through the cooperation of the plurality of first annular pipes 13 and the annular heat dissipation plates 14, the passing lubricating oil can be shunted, so that the lubricating oil flows in a thin layer in the annular heat dissipation plates 14. While increasing the contact area between the annular heat dissipation plates 14 and the wind blown by the fan 34, it is convenient for the wind to take away the heat of the lubricating oil in the annular heat dissipation plates 14, achieving the effect of rapid cooling.

[0039] On both sides of the annular heat dissipation plate 14, annular cold water plates 15 are fixedly connected. A cold water cavity is formed between the annular cold water plate 15 and the annular heat dissipation plate 14. Above and below the annular cold water plate 15, annular pipes II 18 are provided. The annular pipes II 18 are connected to the cold water cavity through thin pipes II. The annular pipes II 18 below the annular cold water plate 15 are all connected to the water outlet pipe 16, and the annular pipes II 18 above the annular cold water plate 15 are all connected to the water inlet pipe 17. On the outer wall of the air cylinder 35, a water pipe radiator 21 is installed. The water pipe radiator 21 is adapted to one of the fans 34. One end of the water outlet pipe 16 far from the annular pipe II 18 is connected to a connecting pipe I 19. At the bottom of the inner cavity of the chassis 1, a water pump 20 is installed. One end of the connecting pipe I 19 far from the water outlet pipe 16 is connected to the water pump 20. The water pipe radiator 21 is connected to the water pump 20. One end of the water inlet pipe 17 far from the annular pipe II 18 is fixedly connected to a connecting pipe II 22. The connecting pipe II 22 is connected to the water pipe radiator 21. During operation, by arranging the annular cold water plates 15 on both sides of the annular heat dissipation plate 14 and through the cooperation of the water pump 20 with the water outlet pipe 16, the water inlet pipe 17, the connecting pipe I 19, the connecting pipe II 22 and the water pipe radiator 21, cold water can flow in the cold water cavity formed between the annular cold water plate 15 and the annular heat dissipation plate 14, quickly taking away the heat of the lubricating oil in the annular heat dissipation plate 14. In addition, since the lubricating oil in the annular heat dissipation plate 14 is in a state of flowing from bottom to top, while the water in the cold water cavity is in a state of flowing from top to bottom, the relative flow directions of the cold water and the lubricating oil are opposite, which is beneficial to more efficient heat exchange and further improves the cooling efficiency of the lubricating oil.

[0040] The water pipe radiator 21 is composed of a plurality of horizontal spiral pipes and U-shaped connecting pipes. The water pump 20 is fixedly connected to the spiral pipe at the bottommost part inside the water pipe radiator 21. The connecting pipe II 22 is fixedly connected to the spiral pipe at the uppermost part inside the water pipe radiator 21. During operation, when the cold water in the cold water cavity that has absorbed the heat of the lubricating oil enters the water pipe radiator 21 under the suction of the water pump 20, it will flow layer by layer from the bottommost spiral pipe upwards. During this process, the upper fan 34 blows downward and takes away the heat of the cold water in the spiral pipe, facilitating the cold water to flow back to the cold water cavity again to cool the lubricating oil in the annular heat dissipation plate 14.

[0041] On both outer walls of the annular heat dissipation plate 14, annular heat dissipation fins 23 are fixedly connected. One end of the annular heat dissipation fins 23 far from the annular heat dissipation plate 14 extends to the outside of the annular cold water plate 15, and the fins on the annular heat dissipation fins 23 are distributed in a staggered manner; during operation, by arranging the annular heat dissipation fins 23 outside the annular heat dissipation plate 14, it is convenient to quickly export the heat of the lubricating oil to the cold water cavity, and then it is convenient for the cold water to absorb the heat of the lubricating oil. And by designing the fins on the annular heat dissipation fins 23 to be in a staggered distribution, when the water flow flows from top to bottom, it can fully contact the fins, preventing a part of the water flow from directly flowing away through the gaps. In addition, one end of the annular heat dissipation fins 23 extends to the outside of the annular cold water plate 15, which is convenient to cooperate with the fan 34 above to cool it.

[0042] On the inner wall of the air duct 35, a mounting plate 24 is fixedly connected. The mounting plate 24 is located above the second oil circuit branch pipe 8. On the top of the mounting plate 24, a motor 25 is fixedly installed. The output end of the motor 25 is fixedly connected with a rotating shaft 26. A first gear 27 is fixedly connected to the rotating shaft 26. On one side of the first gear 27, a second gear 28 is meshed and connected. A rotating rod 29 is fixedly connected to the second gear 28. The bottom end of the rotating rod 29 extends below the mounting plate 24 and is fixedly connected with two support rods 30. On one side of the annular cold water plate 15 far from the annular heat dissipation plate 14, spray plates 31 are provided. The spray plate 31 close to one side of the rotating rod 29 is fixedly connected with the support rod 30. The spray plates 31 are fixedly connected through a connecting rod 32. The top end of the rotating rod 29 is rotatably connected with a water supply pipe 33. The water supply pipe 33 is communicated with the inner cavity of the rotating rod 29. The inner cavity of the rotating rod 29 is communicated with the inner cavity of the support rod 30. The inner cavity of the support rod 30 is communicated with the inner cavity of the spray plate 31 close to one side of the rotating rod 29. The inner cavities of the spray plates 31 are communicated with the inner cavity of the connecting rod 32; during operation, when the temperature of the lubricating oil is still higher than the set temperature after all the lubricating oil passes through the oil circuit heat dissipation component, through the water supply pipe 33, an external water supply device is connected, so that the water flow flows through the rotating rod 29, the support rod 30 and the connecting rod 32 in sequence, and finally sprays out from the spray plate 31. And the first gear 27 on the rotating shaft 26 is rotated by the motor 25, so that the second gear 28 drives the rotating rod 29 to rotate, and the spray plate 31 rotates accordingly, realizing the secondary cooling of the annular cold water plate 15 and the annular heat dissipation fins 23, which is convenient to further improve the cooling effect on the lubricating oil. The motor 25 controls the rotating rod 29 to drive the spray plate 31 to swing and rotate reciprocally, but not to contact the first oil circuit branch pipe 7 and the second oil circuit branch pipe 8. In addition, when the annular heat dissipation fins 23 are used for a long time, the spray plate 31 can be used to wash the annular heat dissipation fins 23 exposed outside, preventing dust from accumulating on the fins of the annular heat dissipation fins 23 and reducing the heat dissipation effect.

[0043] The spray area of the spray plate 31 increases sequentially from the center of the air duct 35 to the outside; during operation, through the design of the area of the spray plate 31, the spray plate 31 can correspond to the diameters of the annular cold water plate 15 and the annular heat dissipation fins 23, which is convenient to better achieve the cooling effect.

[0044] At the bottom of the inner cavity of the chassis 1, there is a funnel groove 36. The funnel groove 36 is directly below the air duct 35. The area of the funnel groove 36 is larger than the area of the bottom of the air duct 35. A drain pipe 37 is fixedly connected to the bottom of the funnel groove 36. One end of the drain pipe 37 away from the funnel groove 36 extends to the outside of the chassis 1. During operation, by arranging the funnel groove 36 and the drain pipe 37 below the air duct 35, it is convenient to directly discharge the wastewater after spray washing, avoiding the accumulation of wastewater in the chassis 1 and damaging the electrical components.

[0045] An electric heater 12 is fixedly installed at one end of the U-shaped pipe 6 close to the oil inlet pipe 4. During operation, when the external temperature is relatively low and the temperature of the lubricating oil is still lower than the set temperature after being compressed and rubbed by the screw, the electric heater 12 can heat up the lubricating oil passing through the U-shaped pipe 6, avoiding the phenomenon of emulsification due to too low temperature of the lubricating oil, and ensuring the performance and service life of the lubricating oil.

[0046] A usage method of an energy-efficient screw air compressor, which is applicable to the above-mentioned energy-efficient screw air compressor. The usage method includes the following steps:

[0047] S1: When the temperature of the lubricating oil is higher than the set normal temperature, the first valve 9, the second valve 10 and the third valve 11 are opened simultaneously. A part of the lubricating oil directly flows from the U-shaped pipe 6 into the oil inlet pipe 4, and another part of the lubricating oil enters the first oil circuit branch pipe 7 from the U-shaped pipe 6, and after being cooled by the oil circuit heat dissipation component, it returns to the U-shaped pipe 6 again through the second oil circuit branch pipe 8, and finally enters the oil inlet pipe 4 and returns to the body 2.

[0048] S2: When the temperature sensor senses that the overall oil temperature is always higher than the set normal temperature, the first valve 9 is closed, and the second valve 10 and the third valve 11 are opened. All the lubricating oil entering the U-shaped pipe 6 enters the oil circuit heat dissipation component for cooling, and finally returns to the U-shaped pipe 6 through the second oil circuit branch pipe 8.

[0049] S3: When the lubricating oil is still higher than the set temperature after passing through the oil circuit heat dissipation component, start the motor 25, connect an external water supply device through the water supply pipe 33, so that the water flows through the rotating rod 29, the support rod 30 and the connecting rod 32 in sequence, and finally sprays out from the spray plate 31, realizing the secondary cooling of the annular cold water plate 15 and the annular heat dissipation fins 23, and further reducing the temperature of the lubricating oil.

[0050] S4: When the external temperature is relatively low and the temperature of the lubricating oil is still lower than the set temperature after being compressed and rubbed by the screw, the electric heater 12 can heat up the lubricating oil passing through the U-shaped pipe 6.

[0051] Working principle: The drain pipe 3 transports the lubricating oil after screw compression to the U-shaped pipe 6 in the temperature controller 5. The temperature sensor on the U-shaped pipe 6 senses the temperature of the lubricating oil in real time. When the temperature of the lubricating oil is higher than the set normal temperature, valve one 9, valve two 10 and valve three 11 are opened simultaneously. A part of the lubricating oil directly flows from the U-shaped pipe 6 into the inlet pipe 4, and another part of the lubricating oil enters the first oil circuit branch pipe 7 from the U-shaped pipe 6, and after being cooled by the oil circuit heat dissipation component, it returns to the U-shaped pipe 6 again through the second oil circuit branch pipe 8, and finally enters the inlet pipe 4 and returns to the body 2. By mixing a part of the cooled lubricating oil, the overall oil temperature of the lubricating oil can be reduced. When the temperature sensor senses that the overall oil temperature is always higher than the set normal temperature, valve one 9 is closed, and valve two 10 and valve three 11 are opened. All the lubricating oil entering the U-shaped pipe 6 enters the oil circuit heat dissipation component through the first oil circuit branch pipe 7 for cooling, and finally returns to the U-shaped pipe 6 through the second oil circuit branch pipe 8. The oil circuit heat dissipation component can quickly reduce the overall oil temperature of the lubricating oil. When the lubricating oil enters the first oil circuit branch pipe 7, it will enter a plurality of lower annular pipes one 13 through the first oil circuit branch pipe 7. The lubricating oil enters the inner cavity of the annular heat dissipation plate 14 from the annular pipe one 13, and finally converges from the upper annular pipe one 13 into the second oil circuit branch pipe 8 and returns to the U-shaped pipe 6 again. The cooperation of the plurality of annular pipes one 13 and the annular heat dissipation plate 14 can divide the passing lubricating oil, so that the lubricating oil presents a thin layer when flowing in the annular heat dissipation plate 14. While increasing the contact area between the annular heat dissipation plate 14 and the wind blown by the fan 34, it is convenient for the wind to take away the heat of the lubricating oil in the annular heat dissipation plate 14, achieving the effect of rapid cooling. By arranging annular cold water plates 15 on both sides of the annular heat dissipation plate 14, and through the cooperation of the water pump 20 with the outlet pipe 16, the inlet pipe 17, the first connecting pipe 19, the second connecting pipe 22 and the water pipe radiator 21, cold water can flow in the cold water cavity formed between the annular cold water plate 15 and the annular heat dissipation plate 14, quickly taking away the heat of the lubricating oil in the annular heat dissipation plate 14. In addition, since the lubricating oil is in a state of flowing from bottom to top in the annular heat dissipation plate 14, and the water in the cold water cavity is in a state of flowing from top to bottom, the relative flow direction between the cold water and the lubricating oil is opposite, which is beneficial to more efficient heat exchange and further improves the cooling efficiency of the lubricating oil. When the cold water that has absorbed the heat of the lubricating oil enters the water pipe radiator 21 under the suction of the water pump 20, it will flow layer by layer from the lowest spiral pipe upwards. During this process, the upper fan 34 blows downward, taking away the heat of the cold water in the spiral pipe, which is convenient for the cold water to flow back to the cold water cavity again to cool the lubricating oil in the annular heat dissipation plate 14. By arranging annular heat dissipation fins 23 on the outer side of the annular heat dissipation plate 14, it is convenient to quickly export the heat of the lubricating oil to the cold water cavity, and then it is convenient for the cold water to absorb the heat of the lubricating oil. And by designing the fins on the annular heat dissipation fins 23 to be staggered, when the water flows from top to bottom, it can fully contact with the fins.Prevent a part of the water flow from directly flowing away through the gap, and one end of the annular heat sink 23 extends to the outside of the annular cold water plate 15, facilitating cooling by the upper fan 34. When the temperature of the lubricating oil is still higher than the set temperature after passing through the oil circuit heat dissipation component, a water supply device is externally connected through the water supply pipe 33, so that the water flow successively passes through the rotating rod 29, the support rod 30 and the connecting rod 32, and finally sprays out from the spray plate 31. Also, the motor 25 drives the gear one 27 on the rotating shaft 26 to rotate, making the gear two 28 drive the rotating rod 29 to rotate, and the spray plate 31 rotates accordingly, realizing the secondary cooling of the annular cold water plate 15 and the annular heat sink 23, facilitating further improving the cooling effect on the lubricating oil. The motor 25 controls the rotating rod 29 to drive the spray plate 31 to reciprocally swing and rotate, but not to contact the oil circuit branch one 7 and the oil circuit branch two 8. Additionally, when the annular heat sink 23 is used for a long time, the spray plate 31 can be used to wash the annular heat sink 23 exposed on the outside, preventing dust from accumulating on the fins of the annular heat sink 23 and reducing the heat dissipation effect. By arranging the funnel groove 36 and the drain pipe 37 below the air duct 35, it is convenient to directly discharge the waste water after spray washing, preventing the waste water from accumulating in the chassis 1 and damaging the electrical components. When the external temperature is relatively low and the temperature of the lubricating oil is still lower than the set temperature after passing through the screw compression and friction, the electric heater 12 can heat and raise the temperature of the lubricating oil passing through the U-shaped pipe 6, preventing the phenomenon of emulsification due to too low temperature of the lubricating oil, and ensuring the performance and service life of the lubricating oil.

[0052] The above front, back, left, right, up, and down are all based on the Figure 1 description in the attached drawings of the specification. Taking the perspective of the observer as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0053] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency and energy-saving screw air compressor, characterized by: The invention comprises a chassis and a body, wherein the body is fixedly installed in the chassis, and a temperature controller is installed at the bottom of the inner cavity of the chassis, and a U-shaped tube is inlaid in the inner cavity of the temperature controller, and both ends of the U-shaped tube are bent, and the two ends of the U-shaped tube are respectively connected with an oil drain pipe and an oil inlet pipe, and the oil drain pipe is located below the oil inlet pipe, and the side of the U-shaped tube away from the oil drain pipe is connected with an oil branch pipe 1 and an oil branch pipe 2 in sequence from bottom to top, and an oil heat dissipation component is provided in the inner cavity of the chassis, and the oil heat dissipation component is connected with both the oil branch pipe 1 and the oil branch pipe 2, and a valve 1 is fixedly installed on the side of the U-shaped tube away from the oil drain pipe, and the valve 1 is located between the oil branch pipe 1 and the oil branch pipe 2, and a valve 2 is fixedly installed on the end of the oil branch pipe 1 close to the temperature controller, and a valve 3 is fixedly installed on the end of the oil branch pipe 2 close to the temperature controller, and a temperature sensor is fixedly installed on the end of the U-shaped tube close to the oil drain pipe; The oil circuit heat dissipation assembly includes an annular tube 1, an annular heat dissipation plate and a fan. Two fans are fixedly installed on the top of the chassis. A wind tube is fixedly connected to the inner wall of the chassis. The wind tube is adapted to one fan. A plurality of annular heat dissipation plates are arranged in the wind tube. The diameters of the plurality of annular heat dissipation plates increase successively. An annular tube 1 is provided above and below the plurality of annular heat dissipation plates. The annular tube 1 is communicated with the inner cavity of the annular heat dissipation plate through a plurality of thin tubes 1. The end of the oil circuit branch pipe 1 away from the U-shaped tube is communicated with the annular tube 1 below the plurality of annular heat dissipation plates. The end of the oil circuit branch pipe 2 away from the U-shaped tube is communicated with the annular tube 1 above the plurality of annular heat dissipation plates. Both sides of the annular heat sink are fixedly connected with annular cold water plates, and a cold water cavity is formed between the annular cold water plate and the annular heat sink. An annular pipe 2 is provided above and below the annular cold water plate. The annular pipe 2 is connected to the cold water cavity through a thin pipe 2. The annular pipe 2 below the annular cold water plate is connected to the water outlet pipe, and the annular pipe 2 above the annular cold water plate is connected to the water inlet pipe. A water pipe radiator is installed on the outer wall of the wind tube, and the water pipe radiator is adapted to one of the fans. The water outlet pipe is away from the annular pipe 2. One end of the heat dissipation pipe is connected to a connecting pipe 1, a water pump is installed at the bottom of the inner cavity of the chassis, the end of the connecting pipe 1 away from the water outlet pipe is connected to the water pump, the water pipe radiator is connected to the water pump, the end of the water inlet pipe away from the annular pipe 2 is fixedly connected to the connecting pipe 2, and the connecting pipe 2 is connected to the water pipe radiator; annular heat sinks are fixedly connected to the outer walls of both sides of the annular heat plate, the end of the annular heat sink away from the annular heat plate extends to the outside of the annular cold water plate, and a spray plate is provided on the side of the annular cold water plate away from the annular heat plate.

2. The high-efficiency energy-saving screw air compressor according to claim 1, characterized in that: The water tube radiator is composed of a plurality of horizontal vortex tubes and a U-shaped connecting pipe. The water pump is fixedly connected to the lowest vortex tube in the water tube radiator, and the second connecting pipe is fixedly connected to the uppermost vortex tube in the water tube radiator.

3. The high-efficiency energy-saving screw air compressor according to claim 2, characterized in that: The fins on the annular heat sink are all distributed in a staggered manner.

4. The high-efficiency energy-saving screw air compressor according to claim 3, characterized in that: A mounting plate is fixedly connected to the inner wall of the air cylinder, and the mounting plate is located above the oil branch pipe 2. A motor is fixedly installed on the top of the mounting plate, and a rotating shaft is fixedly connected to the output end of the motor, and a gear 1 is fixedly connected to the rotating shaft, and one side of the gear 1 is meshedly connected to the gear 2, and a rotating rod is fixedly connected to the gear 2, and the bottom end of the rotating rod extends to the bottom of the mounting plate and is fixedly connected to two support rods, and the spray plate close to the side of the rotating rod is fixedly connected to the support rod, and the spray plates are fixedly connected by a connecting rod, and the top end of the rotating rod is rotatably connected to a water supply pipe, and the water supply pipe is communicated with the inner cavity of the rotating rod, and the inner cavity of the rotating rod is communicated with the inner cavity of the support rod, and the inner cavity of the support rod is communicated with the inner cavity of the spray plate close to the side of the rotating rod, and the inner cavity of the spray plate is communicated with the inner cavity of the connecting rod.

5. The high-efficiency energy-saving screw air compressor according to claim 4, characterized in that: The spraying area of the spray plate increases from the center of the air duct to the outside.

6. The high-efficiency energy-saving screw air compressor according to claim 5, characterized in that: A funnel groove is provided at the bottom of the inner cavity of the chassis, and the funnel groove is located directly below the air duct. The area of the funnel groove is larger than the area of the bottom of the air duct. A drainage pipe is fixed to the bottom of the funnel groove, and the drainage pipe extends to the outside of the chassis away from one end of the funnel groove.

7. The high-efficiency energy-saving screw air compressor according to claim 6, characterized in that: An electric heater is fixedly installed on one end of the U-shaped tube close to the oil inlet pipe.

8. A method for using a high-efficiency energy-saving screw air compressor, characterized by: The method of use is applicable to a high-efficiency energy-saving screw air compressor according to any one of claims 1 to 7, and the method of use comprises the following steps: S1: When the temperature of the lubricating oil is higher than the set normal temperature, valves 1, 2, and 3 are opened simultaneously. Part of the lubricating oil flows directly from the U-shaped tube to the oil inlet pipe, while the other part of the lubricating oil flows from the U-shaped tube into the oil branch pipe 1, is cooled by the oil heat dissipation component, and then returns to the U-shaped tube through the oil branch pipe 2, and finally enters the oil inlet pipe and returns to the engine body; S2: When the temperature sensor detects that the overall oil temperature is consistently higher than the set normal temperature, valve 1 closes, valves 2 and 3 open, and all the lubricating oil entering the U-shaped tube passes through oil branch pipe 1 and enters the oil cooling assembly for cooling, and finally returns to the U-shaped tube through oil branch pipe 2. S3: When the lubricating oil is still higher than the set temperature after passing through the oil circuit heat dissipation component, the motor is started and the water supply device is connected to the water supply pipe, so that the water flows through the rotating rod, the support rod and the connecting rod in sequence, and finally sprays out from the spray plate, thereby further cooling the annular cold water plate and the annular heat sink, and further reducing the temperature of the lubricating oil; S4: When the outside temperature is low and the temperature of the lubricating oil is still lower than the set temperature after the screw compression friction, the lubricating oil passing through the U-tube can be heated by an electric heater.

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