A centrifugal compressor with high efficiency heat recovery

Abstract

The invention relates to the technical field of air compressors, and discloses a centrifugal compressor with efficient heat energy recovery. The compressor comprises a frame, a working mechanism arranged on the frame, and a heat energy recovery mechanism arranged on the frame. An air storage tank is fixedly installed on the frame, and an air compressor cylinder is fixedly installed on the air storage tank. The air compressor cylinder is used to compress air into the air storage tank. A heat exchange cylinder is arranged on the air compressor cylinder, and water in the heat exchange cylinder exchanges heat with lubricating oil in the air compressor cylinder. When the compressor is working, the heat generated in the air compressor cylinder is heat-exchanged to the water in the heat exchange cylinder. The water in the heat exchange cylinder is stirred as a whole. When the overall water temperature in the heat exchange cylinder exceeds a certain value, the heated water in the heat exchange cylinder is replaced, so that the heat exchange position between the water and the lubricating oil in the compressor, the compressed gas working position and the water maintains a relatively high temperature difference, thereby improving the efficiency of heat energy recovery, ensuring the efficient heat dissipation of the air compressor, and improving the stability of the operation of the air compressor.

Description

Technical Field

[0001] The invention relates to the technical field of air compressors, and in particular to a centrifugal compressor with high-efficiency heat energy recovery. Background Art

[0002] Air compressors are used in many industrial environments to provide compressed air. In the metal welding industry, air compressors are needed to provide compressed air as a welding gas source. When the air compressor is running, a large amount of heat is generated, most of which exists in the circulating lubricating oil. The heat in the circulating lubricating oil is usually absorbed and utilized by the air compressor heat recovery device.

[0003] In existing compressors, such as Chinese patent application CN116292195A, a heat exchange mechanism is optimized and arranged, including a wind energy heat recovery mechanism that uses wind power to take away heat and a water energy heat recovery mechanism that uses water flow to take away heat. The outer surface of the water energy heat recovery mechanism is wrapped with an outer frame that plays a protective role to avoid the risk of scalding when the surface temperature of the water energy heat recovery mechanism is high, thereby improving the safety of use. In addition, wind energy and water energy are used in two forms to respectively perform heat recovery treatment, and water energy is used to absorb the heat in the air compressor oil multiple times, so as to more effectively cool and recover the heat energy in the air compressor oil, and make the temperature in the air compressor oil uniform, so as to avoid the air compressor oil temperature on one side of the heat dissipation point being lower than the temperature at the center position, thereby ensuring the use effect of the air compressor oil.

[0004] However, there are still the following problems: during the heat recovery process of the compressor, the heat exchange time is short. If the heat generation rate of the compressor is greater than the speed of air cooling and water cooling, the temperature of the compressor will become higher and higher, which may easily cause compressor operation failure. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a centrifugal compressor with efficient heat energy recovery, which is equipped with water in a mixed heat exchange cylinder to keep the overall temperature of the water relatively the same, so that a relatively high temperature difference is maintained between the heat exchange position between the water and high-temperature positions such as the lubricating oil and compressed gas doing work in the compressor and the water, thereby avoiding a small temperature difference between the temperature of a local position in the heat exchange cylinder and the lubricating oil and compressed gas doing work in the compressor, which causes a decrease in heat exchange efficiency. This improves the efficiency of heat energy recovery, ensures efficient heat dissipation of the air compressor, and improves the stability of the operation of the air compressor. It solves the problem that during the heat energy recovery process of the compressor, the heat exchange time is short, and if the heat generation rate of the compressor is greater than the air cooling and water cooling rates, the temperature of the compressor becomes higher and higher, which easily causes compressor operation failures.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a centrifugal compressor with high-efficiency heat recovery, comprising a frame, a working mechanism arranged on the frame, and a heat recovery mechanism arranged on the frame, the working mechanism comprising an air storage tank and an air compressor, the frame is fixedly mounted with the air storage tank, the air compressor is fixedly mounted on the air storage tank, one side of the air compressor is an air inlet end, the other side of the air compressor is an air outlet end, the other side of the air compressor is connected with the air storage tank, and the air compressor is used to compress air into the air storage tank;

[0007] The heat energy recovery mechanism includes a heat exchange cylinder and a temperature control valve. The heat exchange cylinder is arranged on the air compressor cylinder. The water in the heat exchange cylinder exchanges heat with the lubricating oil in the air compressor cylinder. The temperature control valve is fixedly installed on the heat exchange cylinder. The temperature control valve is connected to the heat exchange cylinder. The temperature detection end of the temperature control valve extends into the heat exchange cylinder. The temperature control valve is used to open the passage of the temperature control valve when the water temperature in the heat exchange cylinder reaches a certain temperature.

[0008] Preferably, the working mechanism also includes an impeller, which is rotatably fitted in the air compressor cylinder and is adapted to the interior of the air compressor cylinder. One side of the air compressor cylinder is connected to the outside, and one side of the air compressor cylinder is an air inlet end. An air compression buffer box is fixedly installed on the top of the air compressor cylinder, and the air compression buffer box is connected to the air compressor cylinder. The top of the air compressor cylinder is an air outlet end. An air intake pipe is arranged between the air compression buffer box and the air storage tank, and one end of the air intake pipe is connected to the air compression buffer box, and the other end of the air intake pipe is connected to the air storage tank.

[0009] Preferably, a first motor is fixedly mounted on the air storage tank, a first pulley is fixedly mounted on the shaft of the first motor, a second pulley is rotatably mounted on the air compressor cylinder, the second pulley is dynamically connected to the impeller, a connection between the second pulley and the shaft of the impeller passes through the wall of the air compressor cylinder, a connection between the second pulley and the shaft of the impeller and the air compressor cylinder is sealed, and a belt is tensioned between the second pulley and the first pulley.

[0010] Preferably, a protection frame is fixedly mounted on the gas tank, the first pulley, the second pulley and the belt are located between the protection frame and the first motor, and the coverage area of ​​the protection frame is larger than the coverage area of ​​the first pulley, the second pulley and the belt as a whole.

[0011] Preferably, the heat energy recovery mechanism also includes a heat conductor, the heat conductor is fixedly mounted on the air compressor cylinder, heat exchange is maintained between the heat conductor and the lubricating oil in the air compressor cylinder, the heat exchange cylinder is fixedly mounted on the heat conductor, heat exchange is maintained between the heat conductor and the water in the heat exchange cylinder.

[0012] Preferably, a stirring blade is rotatably mounted in the heat exchange tube, the stirring blade is a three-blade fan-shaped structure, the length of the stirring blade is matched with the internal length of the heat exchange tube, a second motor is fixedly mounted on the protection frame, a first traction roller is fixedly mounted on the shaft of the second motor, a second traction roller is rotatably mounted on one end of the heat exchange tube, the second traction roller is dynamically connected to the stirring blade, the shaft connection between the second traction roller and the stirring blade passes through the wall of the heat exchange tube, the shaft connection between the second traction roller and the stirring blade is sealed with the heat exchange tube, and a toothed belt is tensioned between the second traction roller and the first traction roller.

[0013] Preferably, a water inlet pipe is fixedly installed at one end of the heat exchange cylinder, one end of the water inlet pipe is connected to the heat exchange cylinder, the connection between the water inlet pipe and the heat exchange cylinder is located at the upper part of the heat exchange cylinder, the other end of the water inlet pipe is connected to a water supply device, the other end of the heat exchange cylinder is fixedly provided with the temperature control valve, the temperature control valve is located at the lower part of the heat exchange cylinder, a water storage tank is provided next to the gas storage tank, a water supply pipe is provided between the water storage tank and the temperature control valve, one end of the water supply pipe is connected to the temperature control valve, and the other end of the water supply pipe is connected to the water storage tank.

[0014] Preferably, an air chamber is fixedly installed at one end of the air storage tank, and one end of the air storage tank is an air outlet end, which is connected to one end of the air chamber, and the other end of the air chamber is an exhaust end. The bottom end of the air chamber is an open end, and a closed door is slidably fitted in the air chamber. The size of the closed door is matched with the internal size of the air chamber, and the closed door passes through the bottom end of the air chamber. The cross-sectional area of ​​the closed door is larger than the size of the connection point between the air storage tank and the air chamber, and the cross-sectional area of ​​the closed door is larger than the size of the exhaust end of the air chamber, and the closed door is sealed from the bottom end of the air chamber.

[0015] Preferably, a connecting pipe is fixedly installed on the gas storage tank, one end of the connecting pipe is connected to the gas storage tank, the other end of the connecting pipe extends to the side of the air chamber, a sliding pipe is slidably fitted in the other end of the connecting pipe, the sliding pipe passes through the other end of the connecting pipe, the size of the sliding pipe is adapted to the connecting pipe, the sliding pipe is sealed with the connecting pipe, the bottom end of the sliding pipe is located outside the connecting pipe, and the bottom end of the sliding pipe is fixedly connected to the closed door.

[0016] Preferably, a fixed bottom plate is fixedly mounted on the gas storage tank, and the fixed bottom plate is located directly below the closed door. A plurality of telescopic rods are fixedly mounted on the fixed bottom plate, and the extension rods of the telescopic rods are all fixedly connected to the bottom end of the closed door. A spring is sleeved on the telescopic rods, and the top end of the spring is connected to the bottom end of the closed door, and the bottom end of the spring is connected to the fixed bottom plate.

[0017] Compared with the prior art, the present invention provides a centrifugal compressor with high efficiency heat recovery, which has the following beneficial effects:

[0018] 1. The centrifugal compressor with high-efficiency heat energy recovery starts the compressor, and the air compressor draws external air into the air compressor cylinder. The air compressor cylinder uses centrifugal compressed gas to press the air into the air storage tank. At the same time, when the compressor is working, the heat generated in the air compressor cylinder will be heat-exchanged to the water in the heat exchange cylinder. The water in the heat exchange cylinder is stirred as a whole, so that the overall temperature of the water in the heat exchange cylinder remains relatively the same. When the overall water temperature in the heat exchange cylinder exceeds a certain value, the temperature control valve opens to replace the heated water in the heat exchange cylinder, thereby mixing the water in the heat exchange cylinder to keep the overall temperature of the water relatively the same, so that the heat exchange position between the water and the high-temperature positions such as the lubricating oil and compressed gas in the compressor maintains a relatively high temperature difference with the water, so as to avoid the temperature difference between the local position in the heat exchange cylinder and the position such as the lubricating oil and compressed gas in the compressor that does work is small, resulting in a decrease in heat exchange efficiency, thereby improving the efficiency of heat energy recovery, ensuring efficient heat dissipation of the air compressor, and improving the stability of air compressor operation.

[0019] 2. The centrifugal compressor with high efficiency heat recovery can store water after heating by setting a water storage tank, so as to transport the hot water to other places where hot water is needed, so that the hot water can be utilized, the use cost of the compressor can be reduced, and the waste of water resources can be avoided.

[0020] 3. The centrifugal compressor with high-efficiency heat energy recovery, through the setting of the air chamber and the closed door, enables the air to enter the connecting pipe at the same time as the air is pressed into the air tank. The air in the connecting pipe presses the sliding pipe to move, and the sliding pipe drives the closed door to move in the air chamber, thereby opening the closed door to seal the two ends of the air chamber. At the same time, the closed door presses the telescopic rod to contract and the spring to contract, so that the air chamber will open the passage for compressed air to be used when the pressure in the air tank is greater than the overall elastic force of the spring. When the air pressure in the air tank is small and not greater than the elastic force of the spring, the closed door closes the air chamber, thereby ensuring that the air pressure in the air tank always remains stable for use, avoiding problems caused by low air pressure, causing other equipment to malfunction, and ensuring the stability and safety of compressed air supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic diagram of the structure distribution of the frame of the present invention;

[0022] Figure 2 It is a schematic diagram of the working mechanism structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure distribution of the air compressor cylinder of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure distribution of the protection frame of the present invention;

[0025] Figure 5 This is a schematic diagram of the heat recovery mechanism structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure distribution of the heat exchange tube of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure distribution of the second motor of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure distribution of the air chamber of the present invention.

[0029] In the figure: 1. frame; 2. working mechanism; 21. air storage tank; 22. air compressor cylinder; 23. impeller; 24. air compressor buffer box; 25. air inlet pipe; 26. first motor; 27. first pulley; 28. second pulley; 29. ​​belt; 210. protection frame; 3. heat recovery mechanism; 31. heat conducting member; 32. heat exchange cylinder; 33. stirring blade; 34. second motor; 35. first traction roller; 36. second traction roller; 37. toothed belt; 38. water inlet pipe; 39. temperature control valve; 310. water storage tank; 311. water supply pipe; 312. air chamber; 313. closed door; 314. connecting pipe; 315. sliding pipe; 316. fixed bottom plate; 317. telescopic rod; 318. spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a centrifugal compressor with high efficiency heat energy recovery.

[0032] Example 1, a typical implementation of the present application, as Figure 1As shown, a centrifugal compressor with high efficiency heat energy recovery includes a frame 1, a working mechanism 2 arranged on the frame 1, and a heat energy recovery mechanism 3 arranged on the frame 1, wherein the working mechanism 2 includes an air storage tank 21 and an air compressor cylinder 22, the frame 1 is fixedly mounted with the air storage tank 21, the air compressor cylinder 22 is fixedly mounted on the air storage tank 21, one side of the air compressor cylinder 22 is an air inlet end, the other side of the air compressor cylinder 22 is an air outlet end, the other side of the air compressor cylinder 22 is connected with the air storage tank 21, and the air compressor cylinder 22 is used to compress air into the air storage tank 21;

[0033] The heat energy recovery mechanism 3 includes a heat exchange tube 32 and a temperature control valve 39. The heat exchange tube 32 is arranged on the air compressor tube 22. The water in the heat exchange tube 32 exchanges heat with the lubricating oil in the air compressor tube 22. The temperature control valve 39 is fixedly installed on the heat exchange tube 32. The temperature control valve 39 is connected to the heat exchange tube 32. The temperature detection end of the temperature control valve 39 extends into the heat exchange tube 32. The temperature control valve 39 is used to open the passage of the temperature control valve 39 when the water temperature in the heat exchange tube 32 reaches a certain temperature.

[0034] When using the present invention:

[0035] When the compressor is started, the air compressor cylinder 22 draws external air into the air compressor cylinder 22, and the air compressor cylinder 22 uses centrifugal compressed gas to press the air into the air storage tank 21. At the same time, when the compressor is working, the heat generated in the air compressor cylinder 22 will be heat-exchanged to the water in the heat exchange cylinder 32, and the water in the heat exchange cylinder 32 will be stirred as a whole, so that the overall temperature of the water in the heat exchange cylinder 32 remains relatively the same. When the overall water temperature in the heat exchange cylinder 32 exceeds a certain value, the temperature control valve 39 opens to replace the heated water in the heat exchange cylinder 32, thereby mixing the water in the heat exchange cylinder to keep the overall temperature of the water relatively the same, so that the heat exchange position between the water and the high-temperature positions such as the lubricating oil and compressed gas in the compressor maintains a relatively high temperature difference with the water, so as to avoid the temperature difference between the local position in the heat exchange cylinder and the position such as the lubricating oil and compressed gas in the compressor, which is small and causes the heat exchange efficiency to decrease, thereby improving the efficiency of heat energy recovery, ensuring efficient heat dissipation of the air compressor, and improving the stability of the operation of the air compressor.

[0036] Embodiment 2, as Figure 2-Figure 4 As shown, the difference from the above embodiment is that the working mechanism 2 also includes an impeller 23, and the impeller 23 is rotatably matched inside the air compressor cylinder 22, and the impeller 23 is adapted to the inside of the air compressor cylinder 22, and one side of the air compressor cylinder 22 is connected to the outside, and one side of the air compressor cylinder 22 is the air inlet end, and an air compression buffer box 24 is fixedly installed on the top of the air compressor cylinder 22, and the air compression buffer box 24 is connected to the air compressor cylinder 22, and the top of the air compressor cylinder 22 is the air outlet end, and an air intake pipe 25 is arranged between the air compression buffer box 24 and the air storage tank 21, and one end of the air intake pipe 25 is connected to the air compression buffer box 24, and the other end of the air intake pipe 25 is connected to the air storage tank 21.

[0037] Furthermore, a first motor 26 is fixedly mounted on the air storage tank 21, a first pulley 27 is fixedly mounted on the shaft of the first motor 26, a second pulley 28 is rotatably mounted on the air compressor cylinder 22, the second pulley 28 is dynamically connected to the impeller 23, the shaft connection between the second pulley 28 and the impeller 23 passes through the wall of the air compressor cylinder 22, the shaft connection between the second pulley 28 and the impeller 23 is sealed from the air compressor cylinder 22, and a belt 29 is tensioned between the second pulley 28 and the first pulley 27.

[0038] Among them, the first motor 26 is started, the first motor 26 drives the first pulley 27 to rotate, the first pulley 27 drives the belt 29 to rotate, the belt 29 drives the second pulley 28 to rotate, and the second pulley 28 drives the impeller 23 to rotate, so that the impeller 23 is used to perform centrifugal air delivery in the air compressor cylinder 22 to deliver air into the air compressor buffer box 24, and then the air is pressed into the air storage tank 21 along the air intake pipe 25.

[0039] Furthermore, a protection frame 210 is fixedly installed on the gas storage tank 21, and the first pulley 27, the second pulley 28, and the belt 29 are located between the protection frame 210 and the first motor 26. The coverage area of ​​the protection frame 210 is larger than the overall coverage area of ​​the first pulley 27, the second pulley 28, and the belt 29.

[0040] Embodiment 3, as Figure 5-Figure 8 As shown, the difference from the above embodiment is that the heat energy recovery mechanism 3 also includes a heat conductor 31, the heat conductor 31 is fixedly mounted on the air compressor cylinder 22, and heat exchange is maintained between the heat conductor 31 and the lubricating oil in the air compressor cylinder 22, and a heat exchange cylinder 32 is fixedly mounted on the heat conductor 31, and heat exchange is maintained between the heat conductor 31 and the water in the heat exchange cylinder 32.

[0041] Furthermore, a stirring blade 33 is rotatably mounted in the heat exchange tube 32. The stirring blade 33 is a three-blade fan-shaped structure. The length of the stirring blade 33 is adapted to the internal length of the heat exchange tube 32. A second motor 34 is fixedly mounted on the protection frame 210. A first traction roller 35 is fixedly mounted on the shaft of the second motor 34. A second traction roller 36 is rotatably mounted on one end of the heat exchange tube 32. The second traction roller 36 is dynamically connected to the stirring blade 33. The shaft connection between the second traction roller 36 and the stirring blade 33 passes through the wall of the heat exchange tube 32. The shaft connection between the second traction roller 36 and the stirring blade 33 is sealed from the heat exchange tube 32. A toothed belt 37 is tensioned between the second traction roller 36 and the first traction roller 35.

[0042] Furthermore, a water inlet pipe 38 is fixedly installed at one end of the heat exchange cylinder 32, one end of the water inlet pipe 38 is connected to the heat exchange cylinder 32, the connection point between the water inlet pipe 38 and the heat exchange cylinder 32 is located at the upper part of the heat exchange cylinder 32, the other end of the water inlet pipe 38 is connected to the water supply equipment, and a temperature control valve 39 is fixedly provided at the other end of the heat exchange cylinder 32, the temperature control valve 39 is located at the lower part of the heat exchange cylinder 32, a water storage tank 310 is provided next to the gas storage tank 21, a water supply pipe 311 is provided between the water storage tank 310 and the temperature control valve 39, one end of the water supply pipe 311 is connected to the temperature control valve 39, and the other end of the water supply pipe 311 is connected to the water storage tank 310.

[0043] In which, water is first sent from the water inlet pipe 38 into the heat exchange cylinder 32 to fill it up. At this time, the temperature control valve 39 is in a closed state, and the second motor 34 is started. The second motor 34 drives the first traction roller 35 to rotate, the first traction roller 35 drives the toothed belt 37 to rotate, the toothed belt 37 drives the second traction roller 36 to rotate, and the second traction roller 36 drives the stirring blade 33 to rotate, so that the stirring blade 33 mixes and stirs the water in the heat exchange cylinder 32, so that the whole water in the heat exchange cylinder 32 is evenly heat-exchanged with the lubricating oil in the air compressor cylinder 22 by the heat conductive member 31, and then the temperature control valve 39 is turned on. When the valve 39 detects that the water in the heat exchange cylinder 32 reaches a certain temperature, that is, when the temperature difference between the water temperature in the heat exchange cylinder 32 and the lubricating oil temperature in the air compressor cylinder 22 becomes smaller and smaller, resulting in a serious reduction in heat exchange efficiency, the temperature control valve 39 opens to discharge the hot water in the heat exchange cylinder 32, and the hot water flows into the water storage tank 310 along the water supply pipe 311. The hot water in the water storage tank 310 is used in other places where hot water is used. At the same time, the water inlet pipe 38 simultaneously flows new cold water into the heat exchange cylinder 32 to replace and cool the water in the heat exchange cylinder 32.

[0044] Furthermore, an air chamber 312 is fixedly installed at one end of the air storage tank 21, and one end of the air storage tank 21 is an air outlet end, and the air outlet end of the air storage tank 21 is connected to one end of the air chamber 312, and the other end of the air chamber 312 is an exhaust end. The bottom end of the air chamber 312 is an open end, and a closed door 313 is slidably fitted in the air chamber 312. The size of the closed door 313 is adapted to the internal size of the air chamber 312, and the closed door 313 passes through the bottom end of the air chamber 312. The cross-sectional area of ​​the closed door 313 is larger than the size of the connection point between the air storage tank 21 and the air chamber 312, and the cross-sectional area of ​​the closed door 313 is larger than the size of the exhaust end of the air chamber 312, and the closed door 313 is sealed from the bottom end of the air chamber 312.

[0045] Furthermore, a connecting pipe 314 is fixedly installed on the gas tank 21, one end of the connecting pipe 314 is connected to the gas tank 21, the other end of the connecting pipe 314 extends to the side of the air chamber 312, and a sliding pipe 315 is slidably fitted in the other end of the connecting pipe 314, the sliding pipe 315 passes through the other end of the connecting pipe 314, the size of the sliding pipe 315 is adapted to the connecting pipe 314, the sliding pipe 315 and the connecting pipe 314 are sealed, the bottom end of the sliding pipe 315 is located outside the connecting pipe 314, and the bottom end of the sliding pipe 315 is fixedly connected to the closed door 313.

[0046] Furthermore, a fixed bottom plate 316 is fixedly installed on the gas storage tank 21, and the fixed bottom plate 316 is located directly below the closed door 313. A plurality of telescopic rods 317 are fixedly installed on the fixed bottom plate 316, and the extension rods of the telescopic rods 317 are all fixedly connected to the bottom end of the closed door 313. A spring 318 is sleeved on the telescopic rods 317, and the top end of the spring 318 is connected to the bottom end of the closed door 313, and the bottom end of the spring 318 is connected to the fixed bottom plate 316.

[0047] Among them, as the air is compressed into the gas storage tank 21, the air enters the connecting pipe 314 at the same time. The air in the connecting pipe 314 presses the sliding pipe 315 to move, and the sliding pipe 315 drives the closing door 313 to move in the air chamber 312, so as to open the closing door 313 on both ends of the air chamber 312. At the same time, the closing door 313 presses the telescopic rod 317 to contract, and presses the spring 318 to contract, so that the air chamber 312 will open the passage for compressed air to be used when the pressure in the gas storage tank 21 is greater than the overall elastic force of the spring 318. When the air pressure in the gas storage tank 21 is small and not greater than the elastic force of the spring 318, the closing door 313 closes the air chamber 312.

[0048] The overall working principle of the compressor:

[0049] Start the compressor, the air compressor cylinder 22 draws external air into the air compressor cylinder 22, and the air compressor cylinder 22 uses centrifugal compressed gas to press the air into the air storage tank 21. At the same time, when the compressor is working, the heat generated in the air compressor cylinder 22 will be heat-exchanged to the water in the heat exchange cylinder 32, and the water in the heat exchange cylinder 32 will be stirred as a whole, so that the overall temperature of the water in the heat exchange cylinder 32 remains relatively the same. When the overall water temperature in the heat exchange cylinder 32 exceeds a certain value, the temperature control valve 39 opens to replace the heated water in the heat exchange cylinder 32, thereby mixing the water in the heat exchange cylinder to keep the overall temperature of the water relatively the same, so that the heat exchange position between the water and the high-temperature positions such as the lubricating oil and compressed gas in the compressor maintains a relatively high temperature difference with the water, so as to avoid the temperature difference between the local position in the heat exchange cylinder and the position such as the lubricating oil and compressed gas in the compressor, which is small and causes the heat exchange efficiency to decrease, thereby improving the efficiency of heat energy recovery, ensuring efficient heat dissipation of the air compressor, and improving the stability of the operation of the air compressor;

[0050] The first motor 26 is started, the first motor 26 drives the first pulley 27 to rotate, the first pulley 27 drives the belt 29 to rotate, the belt 29 drives the second pulley 28 to rotate, the second pulley 28 drives the impeller 23 to rotate, so that the air compressor cylinder 22 uses the impeller 23 to centrifugally send air to the air compressor buffer box 24, and then the air is pressed into the air storage tank 21 along the air inlet pipe 25;

[0051] In addition, water is first fed into the heat exchange cylinder 32 from the water inlet pipe 38 to fill it. At this time, the temperature control valve 39 is in a closed state, and the second motor 34 is started. The second motor 34 drives the first traction roller 35 to rotate, the first traction roller 35 drives the toothed belt 37 to rotate, the toothed belt 37 drives the second traction roller 36 to rotate, and the second traction roller 36 drives the stirring blade 33 to rotate, so that the stirring blade 33 mixes and stirs the water in the heat exchange cylinder 32, so that the whole water in the heat exchange cylinder 32 is evenly heat-exchanged with the lubricating oil in the air compressor cylinder 22 by the heat conducting member 31, and then the temperature control valve 39 is turned on. When the valve 39 detects that the water in the heat exchange cylinder 32 reaches a certain temperature, that is, when the temperature difference between the water temperature in the heat exchange cylinder 32 and the lubricating oil temperature in the air compressor cylinder 22 becomes smaller and smaller, resulting in a serious reduction in heat exchange efficiency, the temperature control valve 39 opens to discharge the hot water in the heat exchange cylinder 32, and the hot water flows into the water storage tank 310 along the water delivery pipe 311. The hot water in the water storage tank 310 is used in other places where hot water is used. At the same time, the water inlet pipe 38 simultaneously flows new cold water into the heat exchange cylinder 32 to replace and cool the water in the heat exchange cylinder 32;

[0052] As the air is compressed into the gas storage tank 21, the air enters the connecting pipe 314 at the same time. The air in the connecting pipe 314 presses the sliding pipe 315 to move, and the sliding pipe 315 drives the closing door 313 to move in the air chamber 312, thereby opening the closing door 313 on both ends of the air chamber 312. At the same time, the closing door 313 presses the telescopic rod 317 to contract, and presses the spring 318 to contract, so that the air chamber 312 will open the passage for compressed air to be used when the pressure in the gas storage tank 21 is greater than the overall elastic force of the spring 318. When the air pressure in the gas storage tank 21 is small and not greater than the elastic force of the spring 318, the closing door 313 closes the air chamber 312.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A centrifugal compressor with high efficiency heat recovery, comprising a frame, a working mechanism arranged on the frame, and a heat recovery mechanism arranged on the frame, characterized in that: The working mechanism includes an air storage tank and an air compressor cylinder. The air storage tank is fixedly mounted on the frame, and the air compressor cylinder is fixedly mounted on the air storage tank. One side of the air compressor cylinder is an air inlet end, and the other side of the air compressor cylinder is an air outlet end. The other side of the air compressor cylinder is connected to the air storage tank, and the air compressor cylinder is used to compress air into the air storage tank. The heat energy recovery mechanism includes a heat exchange cylinder and a temperature control valve. The heat exchange cylinder is provided on the air compressor cylinder. The water in the heat exchange cylinder exchanges heat with the lubricating oil in the air compressor cylinder. The temperature control valve is fixedly installed on the heat exchange cylinder. The temperature control valve is connected to the heat exchange cylinder. The temperature detection end of the temperature control valve extends into the heat exchange cylinder. The temperature control valve is used to open the passage of the temperature control valve when the water temperature in the heat exchange cylinder reaches a certain temperature. The working mechanism also includes an impeller, the impeller is rotatably matched in the air compression cylinder, the impeller is adapted to the inside of the air compression cylinder, one side of the air compression cylinder is connected to the outside, one side of the air compression cylinder is an air inlet end, an air compression buffer box is fixedly installed on the top of the air compression cylinder, the air compression buffer box is connected to the air compression cylinder, the top of the air compression cylinder is an air outlet end, an air intake pipe is arranged between the air compression buffer box and the air storage tank, one end of the air intake pipe is connected to the air compression buffer box, and the other end of the air intake pipe is connected to the air storage tank; A first motor is fixedly mounted on the gas storage tank, a first pulley is fixedly mounted on the shaft of the first motor, a second pulley is rotatably mounted on the air compressor cylinder, the second pulley is dynamically connected to the impeller, a connection between the second pulley and the impeller shaft passes through the wall of the air compressor cylinder, a connection between the second pulley and the impeller shaft and the air compressor cylinder is sealed, and a belt is tensioned between the second pulley and the first pulley; A protection frame is fixedly mounted on the gas storage tank, the first pulley, the second pulley, and the belt are located between the protection frame and the first motor, and the coverage area of ​​the protection frame is larger than the coverage area of ​​the first pulley, the second pulley, and the belt as a whole; The heat recovery mechanism further comprises a heat conducting member, the heat conducting member is fixedly mounted on the air compressor cylinder, the heat conducting member maintains heat exchange with the lubricating oil in the air compressor cylinder, the heat exchange cylinder is fixedly mounted on the heat conducting member, the heat conducting member maintains heat exchange with the water in the heat exchange cylinder; The heat exchange cylinder is rotatably equipped with a stirring blade, the stirring blade is a three-blade fan-shaped structure, the length of the stirring blade is adapted to the internal length of the heat exchange cylinder, a second motor is fixedly mounted on the protection frame, a first traction roller is fixedly mounted on the shaft of the second motor, a second traction roller is rotatably equipped on one end of the heat exchange cylinder, the second traction roller is dynamically connected to the stirring blade, the shaft connection of the second traction roller and the stirring blade passes through the wall of the heat exchange cylinder, the shaft connection of the second traction roller and the stirring blade is sealed with the heat exchange cylinder, and a toothed belt is tensioned between the second traction roller and the first traction roller; A water inlet pipe is fixedly installed at one end of the heat exchange cylinder, one end of the water inlet pipe is connected to the heat exchange cylinder, the connection between the water inlet pipe and the heat exchange cylinder is located at the upper part of the heat exchange cylinder, the other end of the water inlet pipe is connected to the water supply equipment, the other end of the heat exchange cylinder is fixedly provided with the temperature control valve, the temperature control valve is located at the lower part of the heat exchange cylinder, a water storage tank is provided next to the gas storage tank, a water delivery pipe is provided between the water storage tank and the temperature control valve, one end of the water delivery pipe is connected to the temperature control valve, and the other end of the water delivery pipe is connected to the water storage tank; An air chamber is fixedly mounted at one end of the air storage tank, one end of the air storage tank is an air outlet end, the air outlet end of the air storage tank is connected with one end of the air chamber, the other end of the air chamber is an exhaust end, the bottom end of the air chamber is an open end, a closed door is slidably fitted in the air chamber, the size of the closed door is adapted to the inner size of the air chamber, the closed door passes through the bottom end of the air chamber, the cross-sectional area of ​​the closed door is larger than the size of the connection between the air storage tank and the air chamber, the cross-sectional area of ​​the closed door is larger than the size of the exhaust end of the air chamber, and the closed door is sealed with the bottom end of the air chamber; A connecting pipe is fixedly installed on the gas storage tank, one end of the connecting pipe is connected with the gas storage tank, the other end of the connecting pipe extends to the side of the air chamber, a sliding pipe is slidably fitted in the other end of the connecting pipe, the sliding pipe passes through the other end of the connecting pipe, the size of the sliding pipe is adapted to the connecting pipe, the sliding pipe and the connecting pipe are sealed, the bottom end of the sliding pipe is located outside the connecting pipe, and the bottom end of the sliding pipe is fixedly connected to the closed door.

2. A centrifugal compressor with high efficiency heat recovery according to claim 1, characterized in that: A fixed bottom plate is fixedly installed on the gas storage tank, and the fixed bottom plate is located directly below the closed door. A plurality of telescopic rods are fixedly installed on the fixed bottom plate, and the extension rods of the telescopic rods are all fixedly connected to the bottom end of the closed door. A spring is sleeved on the telescopic rods, and the top end of the spring is connected to the bottom end of the closed door, and the bottom end of the spring is connected to the fixed bottom plate.

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