A direct-heating waste heat recovery device
By using a direct-heating waste heat recovery device, heat exchange plates and filter systems are used to achieve heat exchange and multiple recycling of hot air from the air compressor and cold water, solving the problem of unrecovered heat in existing technologies and improving energy utilization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI FEISTO IND CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-06-30
AI Technical Summary
Existing waste heat recovery devices for air compressors fail to effectively recover heat from hot air, resulting in energy waste. Furthermore, direct discharge of hot air requires further conversion and utilization through external equipment, which greatly limits their application.
Design a direct-heating waste heat recovery device that exchanges heat between hot air discharged from an air compressor and cold water through a connecting pipe, recovers heat using a heat exchange plate, and achieves multiple cycles of hot air and water through a filter and a return system. Combined with a temperature sensor and an electronically controlled valve, the device controls the heating and discharge of hot water.
It achieves efficient heat recovery from hot air and water, reduces energy waste, improves the heat reuse rate, and simplifies the heat utilization process.
Smart Images
Figure CN224435147U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial energy-saving technology, and in particular to a direct-heating waste heat recovery device. Background Technology
[0002] During operation, air compressors convert about 80% of electrical energy into heat energy. This heat energy is carried away by hot air and discharged directly into the environment through a cooling system (air-cooled or water-cooled), resulting in energy waste.
[0003] An investigation revealed that patent CN209385309U discloses an air compressor waste heat recovery device, comprising an air compressor, a motor fixedly connected to the upper left side of the air compressor, a cable interface fixedly connected to the upper left side of the air compressor, and casters movably connected to the lower end of the air compressor. The waste heat recovery box includes a sound insulation layer and a heat insulation layer, a support leg fixedly connected to the lower end of the waste heat recovery box, and an air outlet fixedly connected to the right side of the waste heat recovery box. This air compressor waste heat recovery device, with its waste heat recovery box design, adds the function of waste heat recovery to the air compressor, thereby collecting excess waste heat. Furthermore, the filter box design filters the waste heat, allowing the purified hot air to be reused for domestic heating, media preheating, drying, and other applications, effectively protecting the environment and making it more environmentally friendly. Simultaneously, the sound insulation and heat insulation layers effectively reduce noise pollution while keeping the hot air warm.
[0004] The device filters the hot air released by the air compressor directly during use, removing impurities from the hot air. However, the device does not recover the heat from the hot air, but directly discharges the hot air. The discharged hot air is not convenient to use directly and needs to be further converted by external equipment, which has certain limitations in use. Therefore, a direct-heating waste heat recovery device is needed to meet the usage requirements. Utility Model Content
[0005] The purpose of this invention is to provide a direct-heating waste heat recovery device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a direct-heating waste heat recovery device, comprising an air compressor body and a heat exchanger, wherein a connecting air pipe is installed at the air outlet end of the air compressor body, a heat exchange plate is installed inside the heat exchanger, the connecting air pipe is installed on the heat exchange plate, a water inlet pipe is installed on the heat exchanger and the heat exchange plate, a water collection tank is installed inside the heat exchanger, a temperature sensor is installed on the water collection tank, and a temperature display panel and a microcontroller are installed on one side of the heat exchanger.
[0007] Preferably, a support plate is installed on one side of the heat exchanger, a filter is installed on the support plate, a filter layer is installed inside the filter, and the end of the connecting air pipe is installed inside the filter.
[0008] Preferably, the filter is equipped with a return air pipe, the connecting air pipe is equipped with a first connector, and the tail end of the return air pipe is installed on the first connector.
[0009] Preferably, a second connector is installed on the return gas pipe, an exhaust pipe is installed on the second connector, a first electrically controlled valve is installed on the exhaust pipe, and a second electrically controlled check valve is installed on the return gas pipe.
[0010] Preferably, a return pump is installed on one side of the heat exchanger. The inlet and outlet ends of the return pump are respectively equipped with a pumping pipe and a return water pipe. A No. 3 connector is installed on the inlet pipe. The tail end of the return water pipe is installed on the No. 3 connector. A drain pipe is installed on the No. 3 connector.
[0011] Preferably, the inlet pipe is equipped with a No. 3 electrically controlled valve, the drain pipe is equipped with a No. 4 electrically controlled valve, and the return water pipe is equipped with a No. 5 electrically controlled valve.
[0012] The beneficial effects of this utility model are:
[0013] In this invention, the hot air discharged from the air compressor body enters the filter through the connecting air pipe and is filtered. The external water source is introduced through the water inlet pipe, and the hot air and cold water will convect through the connecting air pipe and the water inlet pipe respectively, and exchange heat through the heat exchange plate. The heat exchanged will heat the water, thereby achieving the effect of heat recovery and reducing energy waste.
[0014] In this invention, the filtered gas flows back into the connecting pipe through the return gas pipe, allowing for repeated heat recovery from the gas, resulting in good heat recovery efficiency. The system can open the No. 5 electric control valve and close the No. 4 and No. 3 electric control valves. At this time, the return pump will pump water from the collection tank to the return water pipe through the extraction pipe, and then return the water to the inlet pipe, repeatedly heating the water collected in the collection tank to the desired temperature. Attached Figure Description
[0015] Figure 1 This is a front view structural diagram of a direct-heating waste heat recovery device proposed in this utility model;
[0016] Figure 2 This is a schematic diagram of the connecting gas pipe, heat exchange plate, water inlet pipe, etc. of a direct-heating waste heat recovery device proposed in this utility model.
[0017] Figure 3This is a schematic diagram of the structure of the collection tank, drain pipe, etc. of a direct-heating waste heat recovery device proposed in this utility model.
[0018] Figure 4 This is a schematic diagram of the exhaust pipe, return gas pipe, and other structures of a direct-heating waste heat recovery device proposed in this utility model.
[0019] In the diagram: 1. Air compressor body; 2. Heat exchanger; 3. Connecting air pipe; 4. Heat exchange plate; 5. Water inlet pipe; 6. Water collection tank; 7. Temperature sensor; 8. Temperature display panel; 9. Microcontroller; 10. Support plate; 11. Filter; 12. Filter layer; 13. Return air pipe; 14. Connector No. 1; 15. Connector No. 2; 16. Exhaust pipe; 17. Solenoid valve No. 1; 18. Solenoid check valve No. 2; 19. Return pump; 20. Extraction pipe; 21. Connector No. 3; 22. Return water pipe; 23. Drain pipe; 24. Solenoid valve No. 3; 25. Solenoid valve No. 4; 26. Solenoid valve No. 5. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0021] Example:
[0022] like Figure 1-4 As shown, this embodiment provides a direct-heating waste heat recovery device, including an air compressor body 1 and a heat exchanger 2. A connecting air pipe 3 is installed at the air outlet end of the air compressor body 1. A heat exchange plate 4 is installed inside the heat exchanger 2. The connecting air pipe 3 is installed on the heat exchange plate 4. A water inlet pipe 5 is installed on the heat exchanger 2 and the heat exchange plate 4. A water collection tank 6 is installed inside the heat exchanger 2. A temperature sensor 7 is installed on the water collection tank 6. A temperature display panel 8 and a microcontroller 9 are installed on one side of the heat exchanger 2. The hot air discharged from the air compressor body 1 enters the connecting air pipe 3. The water inlet pipe 5 is pre-connected to an external water source. The external water source introduces corresponding cold water through the water inlet pipe 5. The hot air and cold water will convect through the connecting air pipe 3 and the water inlet pipe 5 respectively, and exchange heat through the heat exchange plate 4. The heat after exchange will heat the water, thereby achieving the effect of heat recovery and reducing energy waste.
[0023] On the other hand, the heated water will enter the collection tank 6 for collection. The temperature sensor 7 can monitor the water temperature and display it through the temperature display panel 8. When it is necessary to raise the water temperature, the water collected in the collection tank 6 can be returned to the inlet pipe 5. The water collected in the collection tank 6 can be repeatedly heated to the required temperature.
[0024] To filter the gas and improve the efficiency of gas heat recovery, a support plate 10 is installed on one side of the heat exchanger 2. A filter 11 is installed on the support plate 10, and a filter layer 12 is installed inside the filter 11. The end of the connecting gas pipe 3 is installed inside the filter 11. A return gas pipe 13 is installed on the filter 11. A first connector 14 is installed on the connecting gas pipe 3. The tail end of the return gas pipe 13 is installed on the first connector 14. A second connector 15 is installed on the return gas pipe 13. An exhaust pipe 16 is installed on the second connector 15. A first electrically controlled valve 17 is installed on the exhaust pipe 16. A second electrically controlled check valve 18 is installed on the return gas pipe 13.
[0025] The hot air entering the filter 11 will be filtered through the filter layer 12. The first electric control valve 17 is closed and the second electric control check valve 18 is opened. The filtered gas will flow back to the connecting gas pipe 3 through the return gas pipe 13. The heat in the gas can be recovered repeatedly, and the heat recovery effect of the gas is good.
[0026] To repeatedly heat the water collected in the collection tank 6 to a suitable temperature and then discharge the heated water for use, a return pump 19 is installed on one side of the heat exchanger 2. The inlet and outlet ends of the return pump 19 are respectively equipped with a pumping pipe 20 and a return water pipe 22. A third connector 21 is installed on the inlet pipe 5, and the end of the return water pipe 22 is installed on the third connector 21. A drain pipe 23 is installed on the third connector 21. A third electric control valve 24 is installed on the inlet pipe 5, a fourth electric control valve 25 is installed on the drain pipe 23, and a fifth electric control valve 26 is installed on the return water pipe 22.
[0027] Open the fifth solenoid valve 26 and close the fourth solenoid valve 25 and the third solenoid valve 24. At this time, the return pump 19 will pump the water in the collection tank 6 to the return water pipe 22 through the pumping pipe 20, and then return it to the inlet pipe 5 through the return water pipe 22. This can repeatedly heat the water collected in the collection tank 6 to the required temperature. When the hot water in the collection tank 6 needs to be used, close the third solenoid valve 24 and open the fourth solenoid valve 25 and the fifth solenoid valve 26. At this time, the heat in the return water pipe 22 will be discharged through the drain pipe 23 for use.
[0028] Working Principle: During operation, the hot air discharged from the air compressor body 1 enters the filter 11 through the connecting air pipe 3 for filtration. The water inlet pipe 5 is pre-connected to an external water source, through which cold water is supplied. The hot air and cold water convect through the connecting air pipe 3 and the water inlet pipe 5 respectively, and exchange heat through the heat exchange plate 4. The exchanged heat heats the incoming water, thus recovering heat and reducing energy waste. The hot air entering the filter 11 is filtered through the filter layer 12. To improve the heat recovery effect, the first electrically controlled valve 17 is closed and the second electrically controlled check valve 18 is opened. The filtered gas flows back to the connecting air pipe 3 through the return air pipe 13, allowing for repeated heat recovery from the gas, resulting in good heat recovery efficiency. On the other hand, the heated water enters the collection tank 6 for collection. The temperature sensor 7 monitors the water temperature and displays it on the temperature display panel 8. When the water temperature needs to be increased, the No. 5 electric control valve 26 can be opened, and the No. 4 electric control valve 25 and the No. 3 electric control valve 24 can be closed. At this time, the return pump 19 will pump the water in the collection tank 6 to the return water pipe 22 through the pumping pipe 20, and then return it to the inlet pipe 5 through the return water pipe 22, which can repeatedly heat the water collected in the collection tank 6 to the required temperature. When the hot water in the collection tank 6 needs to be used, the No. 3 electric control valve 24 can be closed, and the No. 4 electric control valve 25 and the No. 5 electric control valve 26 can be opened. At this time, the heat in the return water pipe 22 will be discharged through the drain pipe 23, which facilitates the collection and use of hot water. The valve body and electrical equipment in this utility model are controlled to close or open by the microcontroller 9.
[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A direct-fired heat recovery device comprising an air compressor body (1) and a heat exchanger (2), characterized in that: The air compressor body (1) is equipped with a connecting air pipe (3) at the air outlet end. The heat exchanger (2) is equipped with a heat exchange plate (4). The connecting air pipe (3) is installed on the heat exchange plate (4). The heat exchanger (2) and the heat exchange plate (4) are equipped with water inlet pipes (5). The heat exchanger (2) is equipped with a water collection tank (6). The water collection tank (6) is equipped with a temperature sensor (7). The heat exchanger (2) is equipped with a temperature display panel (8) and a microcontroller (9) on one side.
2. A direct-fired heat recovery unit as set forth in claim 1 wherein: A support plate (10) is installed on one side of the heat exchanger (2), a filter (11) is installed on the support plate (10), a filter layer (12) is installed inside the filter (11), and the end of the connecting air pipe (3) is installed inside the filter (11).
3. A direct-fired heat recovery unit as set forth in claim 2 wherein: The filter (11) is equipped with a return air pipe (13), and the connecting air pipe (3) is equipped with a first connector (14). The tail end of the return air pipe (13) is installed on the first connector (14).
4. A direct-fired heat recovery unit as set forth in claim 3 wherein: A second connector (15) is installed on the return gas pipe (13), an exhaust pipe (16) is installed on the second connector (15), a first electrically controlled valve (17) is installed on the exhaust pipe (16), and a second electrically controlled check valve (18) is installed on the return gas pipe (13).
5. A direct-fired heat recovery unit as set forth in claim 1 wherein: A return pump (19) is installed on one side of the heat exchanger (2). The inlet and outlet ends of the return pump (19) are respectively equipped with a pumping pipe (20) and a return water pipe (22). A third connector (21) is installed on the inlet pipe (5). The tail end of the return water pipe (22) is installed on the third connector (21). A drain pipe (23) is installed on the third connector (21).
6. A direct-heating waste heat recovery device according to claim 5, characterized in that: The inlet pipe (5) is equipped with a No. 3 electric control valve (24), the drain pipe (23) is equipped with a No. 4 electric control valve (25), and the return water pipe (22) is equipped with a No. 5 electric control valve (26).