Air compressor heat energy recovery device

Abstract

The utility model relates to air compressor technology field, concretely discloses a kind of air compressor heat recovery device, including the air compressor body with oil outlet and oil inlet, the right of air compressor body is provided with double-station heat recovery mechanism, double-station heat recovery mechanism includes first heat exchange tank and second heat exchange tank, the inside of first heat exchange tank and second heat exchange tank is separately provided with first spiral heat pipe and second spiral heat pipe, oil outlet is communicated with the inlet of first spiral heat pipe by the first connecting pipe with first solenoid valve;Let water be heated continuously in first heat exchange tank or first heat exchange tank and be stored and be stationary, solved the problem that medium stays short and heats insufficiently, realized the depth, efficient use of heat energy, entire switching process is completed by controller control, ensure that the high-temperature oil liquid of air compressor body always has unobstructed circulation cooling path, to realize continuous, stable waste heat recovery under the prerequisite of not interrupting air compressor body operation.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and specifically discloses an air compressor heat recovery device. Background Technology

[0002] Air compressors, widely used power equipment in industrial production, generate significant amounts of heat during air compression. The lubricating oil inside absorbs this heat, which is used for lubrication, sealing, and cooling. This heat rises rapidly to over 80°C, forming high-temperature oil. If this heat is directly released into the environment through the cooling system, it not only wastes a huge amount of energy but also exacerbates the urban heat island effect, contradicting the goals of energy conservation and emission reduction for businesses.

[0003] Currently, one approach in existing technology is to allow the cooling medium to flow continuously within the coil, while the high-temperature oil heats the coil from the outside. However, in this continuous flow mode, the residence time of the cooling medium within the coil is too short, resulting in insufficient contact with the heat source. The medium is often discharged before reaching the ideal operating temperature, thus failing to effectively utilize thermal energy. Another approach is to use a static heating mode, where a fixed amount of cooling medium is injected into a tank and stored statically. Through heat exchange with the high-temperature coil, the medium gradually heats up to the target temperature. While this method can obtain hot water at a relatively high temperature, the heat exchange system must be shut down during the process of draining the hot water and re-injecting cold water. This prevents the high-temperature oil generated by the air compressor from being cooled in time, severely impacting the continuous and safe operation of the air compressor itself and hindering continuous and stable waste heat recovery.

[0004] Therefore, an air compressor heat recovery device is needed to solve the above problems. Utility Model Content

[0005] This invention proposes an air compressor heat recovery device that can heat water to a target temperature and effectively utilize heat energy; at the same time, it can achieve continuous and stable waste heat recovery without interrupting the operation of the air compressor itself.

[0006] This utility model is implemented as follows: an air compressor heat energy recovery device includes an air compressor body with an oil outlet and an oil inlet, and a dual-station heat energy recovery mechanism is provided on the right side of the air compressor body.

[0007] The dual-station heat recovery mechanism includes a first heat exchange tank and a second heat exchange tank. The first heat exchange tank and the second heat exchange tank are respectively provided with a first spiral heat-conducting pipe and a second spiral heat-conducting pipe. The oil outlet is connected to the inlet of the first spiral heat-conducting pipe through a first connecting pipe with a first solenoid valve. The oil inlet is connected to the outlet of the second spiral heat-conducting pipe through a return oil pipe. The outlet of the first spiral heat-conducting pipe is connected to the return oil pipe through a second connecting pipe. The inlet of the second spiral heat-conducting pipe is connected to the first connecting pipe through a third connecting pipe with a second solenoid valve.

[0008] An automatic water replenishment and discharge mechanism is provided on the right side of the air compressor body.

[0009] As a preferred embodiment of the air compressor heat recovery device of this utility model, the automatic water replenishment and discharge mechanism includes a controller. The lower sides of the first heat exchange tank and the second heat exchange tank are both connected to a discharge pipe equipped with a first water pump. Each of the two discharge pipes is equipped with a third solenoid valve. The upper sides of the first heat exchange tank and the second heat exchange tank are both connected to a water inlet pipe equipped with a second water pump. Temperature sensors are provided on the outer walls of the first heat exchange tank and the second heat exchange tank. The two temperature sensors extend into the interior of the first heat exchange tank and the second heat exchange tank, respectively. The two temperature sensors, the two first water pumps, the two second water pumps, the first solenoid valve, the second solenoid valve, and the two third solenoid valves are all electrically connected to the controller.

[0010] As a preferred embodiment of the air compressor heat recovery device of this utility model, the oil return pipe is equipped with an oil return pump.

[0011] As a preferred embodiment of the air compressor heat recovery device of this utility model, both the top of the first heat exchange tank and the top of the second heat exchange tank are connected to a pressure relief valve.

[0012] As a preferred embodiment of the air compressor heat recovery device of this utility model, a vertical plate is fixedly installed on the upper end of the first heat exchange tank, and the controller is installed on the outer wall of the vertical plate.

[0013] As a preferred embodiment of the air compressor heat recovery device of this utility model, the tank bodies of the first heat exchange tank and the second heat exchange tank are both made of heat insulation material, and the first spiral heat conduction pipe and the second spiral heat conduction pipe are both made of high thermal conductivity metal material.

[0014] The beneficial effects of this utility model are:

[0015] 1. By allowing water to remain stationary and continuously heated in a first or second heat exchange tank, it has sufficient heat absorption time, thus ensuring it is fully heated to the preset target temperature. This method effectively solves the problem of insufficient heating caused by the short residence time of the medium in traditional flow heat exchange modes, achieving deep and efficient utilization of thermal energy.

[0016] 2. When the water temperature reaches the set value, the oil circuit is automatically switched to another standby heat exchange tank. At the same time, the already heated heat exchange tank is drained and replenished with water. The entire switching process is controlled by the controller, ensuring that the high-temperature oil in the air compressor body always has a smooth circulation and cooling path, thus achieving continuous and stable waste heat recovery without interrupting the operation of the air compressor body. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0018] Figure 1 This is a front sectional view of the overall structure of an air compressor heat recovery device according to this utility model;

[0019] Figure 2 This is a structural diagram of the first heat exchange tank of this utility model;

[0020] Figure 3 This is a structural diagram of the first spiral heat-conducting pipe and the first connecting pipe of this utility model.

[0021] The markings in the diagram are as follows: 1. Air compressor body; 2. Oil inlet; 3. Oil outlet; 4. First heat exchange tank; 5. Second heat exchange tank; 6. First spiral heat conduction pipe; 7. Second spiral heat conduction pipe; 8. First connecting pipe; 9. Second connecting pipe; 10. Oil return pipe; 11. Third connecting pipe; 12. Oil return pump; 13. First solenoid valve; 14. Second solenoid valve; 15. Discharge pipe; 16. First water pump; 17. Vertical plate; 18. Third solenoid valve; 19. Temperature sensor; 20. Pressure relief valve; 21. Controller; 22. Water inlet pipe; 23. Second water pump. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0023] Please see Figure 1-3 An air compressor heat recovery device includes an air compressor body 1 with an oil outlet 3 and an oil inlet 2, and a dual-station heat recovery mechanism is provided on the right side of the air compressor body 1.

[0024] The dual-station heat recovery mechanism includes a first heat exchange tank 4 and a second heat exchange tank 5. The first heat exchange tank 4 and the second heat exchange tank 5 are respectively provided with a first spiral heat conduction pipe 6 and a second spiral heat conduction pipe 7. The oil outlet 3 is connected to the inlet of the first spiral heat conduction pipe 6 through a first connecting pipe 8 with a first solenoid valve 13. The oil inlet 2 is connected to the outlet of the second spiral heat conduction pipe 7 through a return oil pipe 10. The outlet of the first spiral heat conduction pipe 6 is connected to the return oil pipe 10 through a second connecting pipe 9. The inlet of the second spiral heat conduction pipe 7 is connected to the first connecting pipe 8 through a third connecting pipe 11 with a second solenoid valve 14.

[0025] An automatic water replenishment and discharge mechanism is provided on the right side of the air compressor body 1.

[0026] In this embodiment: Initially, the first heat exchange tank 4 is filled with cold water, and the second heat exchange tank 5 is also filled with cold water for future use. The first solenoid valve 13 is open, and the second solenoid valve 14 is closed. During operation, the return oil pump 12 is activated. At this time, the high-temperature oil from the oil outlet 3 of the air compressor body 1 flows through the first connecting pipe 8 and enters the first spiral heat-conducting pipe 6 inside the first heat exchange tank 4. The heat of the oil is transferred through the wall of the first spiral heat-conducting pipe 6 to the stagnant cold water in the first heat exchange tank 4, continuously heating the cold water. Subsequently, the oil flows out from the outlet of the first spiral heat-conducting pipe 6, flows through the second connecting pipe 9 into the return oil pipe 10, and finally returns to the oil inlet 2 of the air compressor body 1 under the drive of the return oil pump 12. In this operating mode, the water is stagnantly stored and continuously heated in the first heat exchange tank 4, allowing sufficient heat absorption time, thus enabling it to be fully heated to the preset target temperature. This effectively solves the problem of insufficient heating caused by the short residence time of the medium in traditional flow heat exchange modes, achieving deep and efficient utilization of thermal energy. It should be noted that the target temperature of the water in the tank is set at a balance point that maximizes the recovery of thermal energy while ensuring that the oil is sufficiently cooled, so that the temperature of the produced hot water reaches a usable high value, while meeting the heat dissipation requirements of the air compressor body 1.

[0027] When the temperature sensor 19 on the first heat exchange tank 4 detects that the water temperature has reached the target value, the station switching program is immediately executed. The controller 21 closes the first solenoid valve 13 and opens the second solenoid valve 14 at the same time to complete the oil circuit switching. At this time, the high-temperature oil flows out from the oil outlet 3 and enters the second spiral heat conduction pipe 7 in the second heat exchange tank 5 through the first connecting pipe 8 and the third connecting pipe 11. The oil that has released heat flows out from the outlet of the second spiral heat conduction pipe 7 and enters the return oil pipe 10 to return to the air compressor body 1.

[0028] While switching the oil circuit, the automatic water replenishment and discharge mechanism delivers the heated hot water in the first heat exchange tank 4 to the water point. After the water in the first heat exchange tank 4 is drained, cold water is injected into the first heat exchange tank 4 to prepare for the next heating cycle.

[0029] The entire process of switching the oil circuit, draining and replenishing water is automatically and quickly completed by the controller 21. The high-temperature oil in the air compressor body 1 always has a smooth circulation and cooling path, which ensures that continuous and stable waste heat recovery can be achieved without interrupting the operation of the air compressor body 1.

[0030] Once the water in the second heat exchange tank 5 is heated to the target temperature, the switching process is executed again, causing the first heat exchange tank 4 to reconnect to the oil circuit for heating, and performing drainage and water replenishment operations for the second heat exchange tank 5.

[0031] As a technical optimization of this utility model, the automatic water replenishment and discharge mechanism includes a controller 21. The lower sides of the first heat exchange tank 4 and the second heat exchange tank 5 are connected to discharge pipes 15 equipped with first water pumps 16. Each of the two discharge pipes 15 is equipped with a third solenoid valve 18. The upper sides of the first heat exchange tank 4 and the second heat exchange tank 5 are connected to water inlet pipes 22 equipped with second water pumps 23. Temperature sensors 19 are provided on the outer walls of the first heat exchange tank 4 and the second heat exchange tank 5. The two temperature sensors 19 extend into the interior of the first heat exchange tank 4 and the second heat exchange tank 5, respectively. The two temperature sensors 19, the two first water pumps 16, the two second water pumps 23, the first solenoid valve 13, the second solenoid valve 14, and the two third solenoid valves 18 are all electrically connected to the controller 21.

[0032] In this embodiment: when the water temperature in the first heat exchange tank 4 or the second heat exchange tank 5 reaches the preset target value, the controller 21 will switch the oil circuit and control the first water pump 16 and the third solenoid valve 18 corresponding to the tank to start, so as to send hot water to the water point through the discharge pipe 15; after the hot water is drained, the controller will control the second water pump 23 corresponding to the tank to start, so as to inject new cold water through the water filling pipe 22. The whole process realizes the automatic production of hot water and the automatic replenishment of cold water.

[0033] As a technical optimization of this utility model, a return oil pump 12 is provided on the return oil pipe 10.

[0034] In this embodiment, the return oil pump 12 is installed on the return oil pipe 10 to provide the power required for the cooled lubricating oil flowing out from the second spiral heat pipe 7 to return to the air compressor body 1.

[0035] As a technical optimization of this utility model, the top of both the first heat exchange tank 4 and the second heat exchange tank 5 are connected to a pressure relief valve 20.

[0036] In this embodiment, pressure relief valves 20 are installed on the top of the first heat exchange tank 4 and the second heat exchange tank 5 respectively. When the water in the first heat exchange tank 4 or the second heat exchange tank 5 generates excessive steam pressure due to continuous heating, the corresponding pressure relief valve 20 will automatically open when the internal pressure exceeds its set safety threshold to discharge excess steam and quickly restore the pressure inside the tank to normal.

[0037] As a technical optimization of this utility model, a vertical plate 17 is fixedly installed on the upper end of the first heat exchange tank 4, and the controller 21 is installed on the outer wall of the vertical plate 17.

[0038] In this embodiment, the controller 21 is fixed by setting the upright plate 17.

[0039] As a technical optimization of this utility model, the tank bodies of the first heat exchange tank 4 and the second heat exchange tank 5 are both made of heat insulation material, and the first spiral heat conduction pipe 6 and the second spiral heat conduction pipe 7 are both made of high thermal conductivity metal material.

[0040] In this embodiment, the first spiral heat pipe 6 and the second spiral heat pipe 7, made of high thermal conductivity metal material, can realize the efficient transfer of heat from the oil inside the pipe to the water outside the pipe; while the tank bodies of the first heat exchange tank 4 and the second heat exchange tank 5, made of heat insulation material, minimize the heat loss of hot water to the environment during the static heating process.

[0041] The working principle and usage process of this utility model are as follows: In the initial state, the first heat exchange tank 4 is filled with cold water, and the second heat exchange tank 5 is also filled with cold water for future use. The first solenoid valve 13 is in the open state, and the second solenoid valve 14 is in the closed state. During operation, the return oil pump 12 is started. At this time, the high-temperature oil from the oil outlet 3 of the air compressor body 1 flows through the first connecting pipe 8 and enters the first spiral heat-conducting pipe 6 inside the first heat exchange tank 4. The heat of the oil is transferred to the stagnant cold water in the first heat exchange tank 4 through the wall of the first spiral heat-conducting pipe 6, continuously heating the cold water. Subsequently, the oil flows out from the outlet of the first spiral heat-conducting pipe 6, flows through the second connecting pipe 9 into the return oil pipe 10, and finally returns to the oil inlet 2 of the air compressor body 1 under the drive of the return oil pump 12. In this working mode, the water is stagnantly stored and continuously heated in the first heat exchange tank 4, with sufficient heat absorption time, thus being fully heated to the preset target temperature. It effectively solves the problem of insufficient heating due to short medium residence time in traditional flow heat exchange mode, and realizes deep and efficient utilization of thermal energy.

[0042] When the temperature sensor 19 on the first heat exchange tank 4 detects that the water temperature has reached the target value, the station switching program is immediately executed. The controller 21 closes the first solenoid valve 13 and opens the second solenoid valve 14 at the same time to complete the oil circuit switching. At this time, the high-temperature oil flows out from the oil outlet 3 and enters the second spiral heat conduction pipe 7 in the second heat exchange tank 5 through the first connecting pipe 8 and the third connecting pipe 11. The oil that has released heat flows out from the outlet of the second spiral heat conduction pipe 7 and enters the return oil pipe 10 to return to the air compressor body 1.

[0043] While switching the oil circuit, the controller 21 controls the opening of the first water pump 16 and the third solenoid valve 18 corresponding to the first heat exchange tank 4, so that the preheated hot water in the tank is delivered to the point of use through the discharge pipe 15. After the water in the first heat exchange tank 4 is drained, the controller 21 controls the start of the second water pump 23 corresponding to the first heat exchange tank 4, so that cold water is injected into the tank through the water filling pipe 22, in preparation for the next heating cycle.

[0044] The entire process of switching the oil circuit, draining and replenishing water is automatically and quickly completed by the controller 21. The high-temperature oil in the air compressor body 1 always has a smooth circulation and cooling path, which ensures that continuous and stable waste heat recovery can be achieved without interrupting the operation of the air compressor body 1.

[0045] Once the water in the second heat exchange tank 5 is heated to the target temperature, the switching process is executed again, causing the first heat exchange tank 4 to reconnect to the oil circuit for heating, and performing drainage and water replenishment operations for the second heat exchange tank 5.

[0046] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. An air compressor heat recovery device, comprising an air compressor body (1) with an oil outlet (3) and an oil inlet (2), characterized in that: A dual-station heat recovery mechanism is provided on the right side of the air compressor body (1); The dual-station heat recovery mechanism includes a first heat exchange tank (4) and a second heat exchange tank (5). The first heat exchange tank (4) and the second heat exchange tank (5) are respectively provided with a first spiral heat-conducting pipe (6) and a second spiral heat-conducting pipe (7). The oil outlet (3) is connected to the inlet of the first spiral heat-conducting pipe (6) through a first connecting pipe (8) with a first solenoid valve (13). The oil inlet (2) is connected to the outlet of the second spiral heat-conducting pipe (7) through a return oil pipe (10). The outlet of the first spiral heat-conducting pipe (6) is connected to the return oil pipe (10) through a second connecting pipe (9). The inlet of the second spiral heat-conducting pipe (7) is connected to the first connecting pipe (8) through a third connecting pipe (11) with a second solenoid valve (14). An automatic water replenishment and discharge mechanism is provided on the right side of the air compressor body (1).

2. The air compressor heat recovery device according to claim 1, characterized in that: The automatic water replenishment and discharge mechanism includes a controller (21). The lower sides of the first heat exchange tank (4) and the second heat exchange tank (5) are connected to discharge pipes (15) with first water pumps (16). Each of the two discharge pipes (15) is equipped with a third solenoid valve (18). The upper sides of the first heat exchange tank (4) and the second heat exchange tank (5) are connected to water supply pipes (22) with second water pumps (23). Temperature sensors (19) are provided on the outer walls of the first heat exchange tank (4) and the second heat exchange tank (5). The two temperature sensors (19) extend into the interior of the first heat exchange tank (4) and the second heat exchange tank (5), respectively. The two temperature sensors (19), the two first water pumps (16), the two second water pumps (23), the first solenoid valve (13), the second solenoid valve (14), and the two third solenoid valves (18) are all electrically connected to the controller (21).

3. The air compressor heat recovery device according to claim 1, characterized in that: The return oil pipe (10) is equipped with a return oil pump (12).

4. The air compressor heat recovery device according to claim 1, characterized in that: The top of both the first heat exchange tank (4) and the second heat exchange tank (5) is connected to a pressure relief valve (20).

5. The air compressor heat recovery device according to claim 2, characterized in that: A vertical plate (17) is fixedly installed on the upper end of the first heat exchange tank (4), and the controller (21) is installed on the outer wall of the vertical plate (17).

6. The air compressor heat recovery device according to claim 1, characterized in that: The bodies of the first heat exchange tank (4) and the second heat exchange tank (5) are both made of heat-insulating material, and the first spiral heat-conducting pipe (6) and the second spiral heat-conducting pipe (7) are both made of high thermal conductivity metal material.

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