Air compressor waste heat and solar energy combined water heating system suitable for pressurized building

Abstract

The application discloses a kind of air compressor waste heat and solar energy combined hot water system suitable for pressurized building, including No.1 water tank, No.2 water tank, No.3 water tank;Air compressor is connected with No.1 heat exchange equipment by oil pipe, the water outlet of No.1 water tank is connected with the backwater port of No.1 water tank by No.1 circulating pump and No.1 heat exchange equipment, the water outlet of No.1 water tank is connected with heating water supply pipe network by No.1 hot water pipe network pump, the backwater port of No.1 water tank is connected with heating water supply pipe network;Air compressor is connected with No.2 heat exchange equipment by air pipe, the water outlet of No.2 water tank is connected with the backwater port of No.2 water tank by No.2 circulating pump and No.2 heat exchange equipment, the water outlet of No.2 water tank is connected with domestic hot water supply pipe by No.3 circulating pump, No.3 water tank and No.2 hot water pipe network pump, No.3 water tank is connected with solar energy heating device.The application obtains more heat energy, has the ability to increase hot water production, and has higher heat recovery efficiency;Make hot water more stable.

Description

Technical Field

[0001] This invention specifically relates to a combined air compressor waste heat and solar energy hot water system suitable for pressurized buildings. Background Technology

[0002] Air compressors are a core component of pressurization systems in pressurized buildings. Approximately 30% of the electrical energy in an air compressor is used for compressed air, while about 70% is converted into heat energy. Utilizing waste heat from air compressors in pressurized buildings has significant energy-saving potential. However, air compressors in pressurized buildings do not operate continuously, but only under conditions such as building ventilation and air storage tank operation. The long operating intervals and short single-run times of air compressors in pressurized buildings determine that using waste heat from air compressors as a single heat source results in a small amount of hot water produced and unstable water temperature, which cannot simultaneously meet the needs of domestic hot water and heating. Existing technologies for waste heat recovery from air compressors specifically suffer from the following problems: low hot water volume, unstable water temperature, and insufficient utilization of waste heat. Summary of the Invention

[0003] The purpose of this invention is to provide a combined air compressor waste heat and solar energy hot water system suitable for pressurized buildings. This system recovers more heat energy, increases hot water production, and has higher heat recovery efficiency. This invention uses solar collectors to participate in hot water preparation, making the hot water more stable and the energy flow more rational.

[0004] The technical solution adopted in this invention is:

[0005] A combined air compressor waste heat and solar energy hot water system suitable for pressurized buildings includes an air compressor, a No. 1 water tank, a No. 2 water tank, a No. 3 water tank, and a solar heating device;

[0006] The air compressor is connected to heat exchange device No. 1 via an oil pipe. The heating outlet of water tank No. 1 is connected to the heating return outlet of water tank No. 1 via a pipeline through circulating pump No. 1 and heat exchange device No. 1. The water supply outlet of water tank No. 1 is connected to the water supply pipe. The heating outlet of water tank No. 1 is connected to the inlet of the heating water supply network via hot water network pump No. 1. The heating return outlet of water tank No. 1 is connected to the outlet of the heating water supply network.

[0007] The air compressor is connected to heat exchange device No. 2 via an air pipe. The heating outlet of water tank No. 2 is connected to the heating return outlet of water tank No. 2 via a pipe through circulating pump No. 2 and heat exchange device No. 2. The water supply outlet of water tank No. 2 is connected to the water supply pipe. The heating outlet of water tank No. 2 is connected to the domestic hot water supply pipe through a pipe through circulating pump No. 3, water tank No. 3 and hot water network pump No. 2. Water tank No. 3 is connected to a solar heating device.

[0008] Preferably, a temperature sensor T1 is installed in water tank No. 1, and the temperature sensor T1 is connected to circulating pump No. 1.

[0009] Preferably, a T3 temperature sensor is installed in water tank No. 2, and the T3 temperature sensor is connected to circulation pump No. 2 and circulation pump No. 3.

[0010] Preferably, a T4 temperature sensor is installed in water tank No. 3, and the T4 temperature sensor is connected to the solar energy installation device.

[0011] Preferably, the solar heating device includes a solar collector and a No. 4 circulating pump. The bottom outlet of the No. 3 water tank is connected to the inlet of the No. 3 water tank through a pipe via the No. 4 circulating pump and the solar collector. The No. 3 water tank is equipped with a T4 temperature sensor, which is connected to the No. 4 circulating pump.

[0012] Preferably, a T5 temperature sensor is installed between the output end of the solar collector and the inlet end of the No. 3 water tank, and the T5 temperature sensor is connected to the No. 4 circulating pump.

[0013] Preferably, a water level sensor is installed in water tank No. 3, and the water level sensor in water tank No. 3 is connected to circulating pump No. 3.

[0014] Preferably, a thermoelectric auxiliary heating device is connected between the No. 1 hot water pipeline pump and the inlet of the heating water supply pipeline.

[0015] Preferably, the thermoelectric auxiliary heating device includes a T2 temperature sensor, an electric auxiliary heating device, a first solenoid valve, and a second solenoid valve. The outlet end of the No. 1 hot water pipeline pump is connected to one end of the second solenoid valve and one end of the first solenoid valve through a pipe via the T2 temperature sensor. The other end of the second solenoid valve is connected to the heating water supply network through a pipe via the electric auxiliary heating device. The other end of the first solenoid valve is also connected to the heating water supply network. The T2 temperature sensor is connected to both the first and second solenoid valves.

[0016] Preferably, a water level sensor is installed in water tank No. 2, and a water supply solenoid valve is installed at the water inlet of water tank No. 2. The water supply solenoid valve is connected to the water level sensor in water tank No. 2.

[0017] The beneficial effects of this invention are:

[0018] This invention utilizes a heat recovery device to recover the waste heat from both the air compressor cooling oil and compressed air, resulting in greater heat energy recovery. The waste heat from the air compressor cooling oil is used to heat heating equipment, and the waste heat from the compressed air is used to heat domestic hot water, thus increasing the capacity for hot water production and achieving higher heat recovery efficiency. Furthermore, this invention incorporates a solar collector into hot water preparation, making the hot water more stable and the energy flow more rational. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a combined air compressor waste heat and solar energy hot water system applicable to pressurized buildings in an embodiment of the present invention.

[0020] In the diagram: 1-Air compressor; 2-Heat exchange device No. 1; 3-Heat exchange device No. 2; 4-Water tank No. 1; 5-Water tank No. 2; 6-Circulating pump No. 1; 7-Circulating pump No. 3; 8-Hot water network pump No. 1; 9-Water tank No. 3; 10-T1 temperature sensor; 11-T3 temperature sensor; 12-Electric auxiliary heating device; 13-Second solenoid valve; 14-First solenoid valve; 15-Hot water network pump No. 2; 16-Circulating pump No. 4; 17-Solar collector; 18-T5 temperature sensor; 19-Circulating pump No. 2; 20-T4 temperature sensor; 21-T2 temperature sensor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to 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 the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0024] Example 1

[0025] A combined air compressor waste heat and solar energy hot water system suitable for pressurized buildings, such as Figure 1 As shown, it includes an air compressor 1, a water tank 4 (No. 1), a water tank 5 (No. 2), a water tank 9 (No. 3), and a solar heating device;

[0026] Air compressor 1 is connected to heat exchange device 2 via oil pipe. The heating outlet of water tank 4 is connected to the heating return outlet of water tank 4 via a pipeline through circulating pump 6 and heat exchange device 2. The water supply outlet of water tank 4 is connected to the municipal water supply pipeline. The heating outlet of water tank 4 is connected to the inlet of the heating water supply network via hot water network pump 8. The heating return outlet of water tank 4 is connected to the outlet of the heating water supply network.

[0027] Air compressor 1 is connected to heat exchange device 3 (No. 2) via an air pipe. The heating outlet of water tank 5 (No. 2) is connected to the heating return outlet of water tank 5 (No. 2) via a pipe through circulating pump 19 (No. 2) and heat exchange device 3 (No. 2). The water supply outlet of water tank 5 (No. 2) is connected to the municipal water supply pipe. The heating outlet of water tank 5 (No. 2) is connected to the domestic hot water supply pipe through circulating pump 7 (No. 3), water tank 9 (No. 3), and hot water network pump 15 (No. 2). Water tank 9 (No. 3) is connected to a solar heating device.

[0028] Furthermore, a T1 temperature sensor 10 is installed in water tank 4, and the T1 temperature sensor 10 is connected to the No. 1 circulation pump 6. When the water temperature in water tank 4 is lower than the set temperature, the T1 temperature sensor 10 transmits a signal to the No. 1 circulation pump 6, the No. 1 circulation pump 6 starts, and heats water tank 4 through the No. 1 circulation pump 6 and the No. 1 heat exchange device 2 until the water in water tank 4 reaches the set temperature.

[0029] Furthermore, a T3 temperature sensor 11 is installed in water tank 5, which is connected to circulation pump 19 and circulation pump 7. When the water temperature in water tank 5 is lower than the set temperature, the T3 temperature sensor 11 transmits a signal to circulation pump 19 and circulation pump 7. Circulation pump 19 starts and circulation pump 7 stops, heating water tank 5 through circulation pump 19 and heat exchange device 3 until the water in water tank 5 reaches the set temperature.

[0030] Furthermore, a T4 temperature sensor 20 is installed in water tank 9, which is connected to the solar energy installation device. When the T4 temperature sensor 20 detects that the water temperature in water tank 9 is lower than the set temperature, the solar energy heating device heats the water in water tank 9. When the T4 temperature sensor 20 detects that the water temperature in water tank 9 is higher than the set temperature, the solar energy heating device stops heating.

[0031] Furthermore, the solar heating device includes a solar collector 17 and a No. 4 circulation pump 16. The bottom outlet of the No. 3 water tank 9 is connected to the inlet of the No. 3 water tank 9 via a pipe through the No. 4 circulation pump 16 and the solar collector 17. The No. 3 water tank 9 is equipped with a T4 temperature sensor 20, which is connected to the No. 4 circulation pump 16. When the T4 temperature sensor 20 detects that the water temperature in the No. 3 water tank 9 is lower than the set temperature, the No. 4 circulation pump 16 and the solar collector 17 start to heat the water in the No. 3 water tank 9. When the T4 temperature sensor 20 detects that the water temperature in the No. 3 water tank 9 is lower than the set temperature, the No. 4 circulation pump 16 and the solar collector 17 shut down to stop heating the water in the No. 3 water tank 9.

[0032] Furthermore, a T5 temperature sensor 18 is installed between the output end of the solar collector 17 and the inlet end of the No. 3 water tank 9, and the T5 temperature sensor 18 is connected to the No. 4 circulating pump 16.

[0033] Furthermore, a water level sensor is installed in water tank 3 9, and the water level sensor in water tank 3 9 is connected to circulating pump 3 7. When the water level sensor in water tank 3 9 detects that the water level in water tank 3 9 is lower than the set water level, circulating pump 3 7 starts and pumps water from water tank 2 5 into water tank 3 9. When the water level sensor in water tank 3 9 detects that the water level in water tank 3 9 is higher than the set water level, circulating pump 3 7 stops working.

[0034] Example 2

[0035] like Figure 1 As shown, based on Example 1, the addition of a thermoelectric auxiliary heating device enhances the performance of Example 2.

[0036] A thermoelectric auxiliary heating device is connected between the No. 1 hot water pipeline pump 8 and the inlet of the heating water supply pipeline.

[0037] Furthermore, the thermoelectric auxiliary heating device includes a T2 temperature sensor 21, an electric auxiliary heating device 12, a first solenoid valve 14, and a second solenoid valve 13. The outlet end of the No. 1 hot water pipeline pump 8 is connected to one end of the second solenoid valve 13 and one end of the first solenoid valve 14 via a pipeline through the T2 temperature sensor 21. The other end of the second solenoid valve 13 is connected to the heating water supply network via a pipeline through the electric auxiliary heating device 12. The other end of the first solenoid valve 14 is also connected to the heating water supply network. The T2 temperature sensor 21 is connected to both the first solenoid valve 14 and the second solenoid valve 13. When the T2 temperature sensor 21 detects that the water supply temperature in the pipeline is below 60 degrees Celsius, the first solenoid valve 14 closes and the second solenoid valve 13 opens. When the T2 temperature sensor 21 detects that the water supply temperature in the pipeline is above 60 degrees Celsius, the first solenoid valve 14 opens and the second solenoid valve 13 closes.

[0038] Furthermore, a water level sensor is installed inside water tank 5, and a water supply solenoid valve is installed at the water inlet of water tank 5. The water supply solenoid valve is connected to the water level sensor inside water tank 5.

[0039] The working principle of this invention is as follows: The system, consisting of an air compressor 1, a heat exchange device 2, and an electric auxiliary heater, has the following technical solution: When the air compressor 1 is running, the heat generated by its oil pipes can heat the water in water tank 4 through heat exchange device 2. Water tank 4 is replenished with water through the municipal water supply pipe. When the temperature sensor inside water tank 4 detects that the water temperature is below 60°C, it controls the start of circulation pump 6. The water in the tank is raised to the set temperature through the water heating circulation network between the oil pipe heat exchange device and the water tank. At this time, solenoid valve 1 is opened, and the hot water in water tank 4 can be transported to the internal heating machine of the pressurized building through hot water network pump 8. Meanwhile, an electric auxiliary heating device 12 is installed in the water distribution network system between water tank 4 and the building's internal heating system. The electric auxiliary heating device 12 is controlled by a temperature sensor in the water distribution network. Once the water distribution network between the water tank and the building's internal heating system is lower than the set temperature of 60°C, the normally closed solenoid valve 2 at the front end of the electric auxiliary heating device 12 opens and the solenoid valve 1 closes. Then, the electric auxiliary heating device 12 heats the water in the network to the set temperature. When the temperature reaches the set value, the water is delivered to the indoor heating system. The return water from the building's internal heating system can return to water tank 4 through the heating return water network.

[0040] The system, consisting of air compressor 1's air pipe heat exchanger and solar heating device, has the following technical solution: When air compressor 1 is running, the heat generated by its air pipe can be used to heat water tank 5. Water tank 5 is replenished with water through the municipal water supply pipe. When the temperature sensor installed inside water tank 5 senses that the water temperature is lower than the set temperature, it controls the start of circulation pump 19. Through the air pipe heat exchanger and the circulating water heating network between the water tanks, the water in the tanks is raised to the set temperature. Then, the hot water in water tank 5 can be transported to water tank 9 through circulation pump 7. Then, hot water network pump 15 can transport the hot water in water tank 9 to the domestic hot water point in the pressurized building. A temperature sensor is installed inside water tank 9. When the temperature sensor detects that the temperature inside the water tank is lower than the set temperature, it controls the start of circulation pump 16 4. The water in water tank 9 is heated by solar collector 17 to reach the set temperature. A circulating heating pipe network is set between solar collector 17 and water tank 9 3. When the temperature sensor in the pipe network detects that the temperature has reached the set temperature, circulation pump 16 4 stops running and solar collector 17 stops working.

[0041] In summary, air compressor 1 uses two separate heat recovery devices to recover waste heat from its cooling oil and compressed air. The cooling oil, after passing through the heat recovery device, uses the recovered heat for building heating. The operating temperature of water tank T1 is set at 55-60℃; when the temperature is below 50-60℃, the circulation pump operates. Compressed air, after passing through the heat recovery device, uses the recovered heat for domestic hot water. The summer set temperature for water tank T3 is 20-30℃, and the winter set temperature is 30-40℃. The compressed air heat recovery device is paired with a solar water heater for auxiliary heating; the compressed oil pipe heat recovery device is paired with electric auxiliary heating. Air compressor 1's oil and air pipes each use two separate heat recovery devices. Cooling oil returns to air compressor 1 after passing through heat exchange device 2 (No. 1), and the hot air formed after pressurization passes through heat recovery device 2 and connects to the booster system. The system has three water tanks. Water tank 4 (No. 1) recovers waste heat from the cooling oil of air compressor 1, and water tank 5 (No. 2) recovers waste heat from the compressed air. Water tank 9 (No. 3) is the water tank for the solar collector panels. Water tank 5 (No. 2) and water tank 9 (No. 3) are connected in series, and water flow from water tank 5 to water tank 9 is achieved through a water pump. Municipal water supply replenishes water tanks 4 (No. 1) and 5 (No. 2) through pipelines. A temperature-controlled solenoid valve 1 is installed between the No. 1 hot water network pump 8 at the rear end of water tank 4 and the booster building, and a temperature-controlled solenoid valve 2 is installed at the front end of the electric auxiliary heating device 12.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A combined air compressor waste heat and solar energy hot water system suitable for pressurized buildings, characterized in that: The system includes an air compressor, water tanks 1, 2, and 3, and a solar heating device. The air compressor is connected to heat exchange equipment 1 via an oil pipe. The heating outlet of water tank 1 is connected to the heating return outlet of water tank 1 via a pipeline through circulating pump 1 and heat exchange equipment 1. The water supply outlet of water tank 1 is connected to the water supply pipe. The heating outlet of water tank 1 is connected to the inlet of the heating water supply network via hot water network pump 1. The heating return outlet of water tank 1... The outlet is connected to the outlet of the heating water supply network; the air compressor is connected to the No. 2 heat exchange device through an air pipe; the heating outlet of the No. 2 water tank is connected to the heating return outlet of the No. 2 water tank through a pipe via the No. 2 circulating pump and the No. 2 heat exchange device; the water supply outlet of the No. 2 water tank is connected to the water supply pipe; the heating outlet of the No. 2 water tank is connected to the domestic hot water supply pipe through a pipe via the No. 3 circulating pump, the No. 3 water tank and the No. 2 hot water network pump; the No. 3 water tank is connected to a solar heating device.

2. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 1, characterized in that: A temperature sensor T1 is installed in water tank No. 1, and the temperature sensor T1 is connected to circulating pump No.

1.

3. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 1, characterized in that: The T3 temperature sensor is installed in water tank No. 2 and is connected to circulation pumps No. 2 and No.

3.

4. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 1, characterized in that: The No. 3 water tank is equipped with a T4 temperature sensor, which is connected to the solar panel installation device.

5. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 4, characterized in that: The solar heating device includes a solar collector and a No. 4 circulating pump. The bottom outlet of the No. 3 water tank is connected to the inlet of the No. 3 water tank through a pipe via the No. 4 circulating pump and the solar collector. The No. 3 water tank is equipped with a T4 temperature sensor, which is connected to the No. 4 circulating pump.

6. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 5, characterized in that: A T5 temperature sensor is installed between the output end of the solar collector and the inlet end of water tank No.

3. The T5 temperature sensor is connected to circulating pump No.

4.

7. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 1, characterized in that: Water level sensor is installed in water tank No. 3, and the water level sensor in water tank No. 3 is connected to circulating pump No.

3.

8. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in any one of claims 1 to 7, characterized in that: A thermoelectric auxiliary heating device is connected between the No. 1 hot water pipeline pump and the inlet of the heating water supply pipeline.

9. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 8, characterized in that: The thermoelectric auxiliary heating device includes a T2 temperature sensor, an electric auxiliary heating device, a first solenoid valve, and a second solenoid valve. The outlet end of the No. 1 hot water pipeline pump is connected to one end of the second solenoid valve and one end of the first solenoid valve through a pipeline via the T2 temperature sensor. The other end of the second solenoid valve is connected to the heating water supply network through a pipeline via the electric auxiliary heating device. The other end of the first solenoid valve is also connected to the heating water supply network. The T2 temperature sensor is connected to both the first and second solenoid valves.

10. The combined air compressor waste heat and solar energy hot water system for pressurized buildings as described in claim 1, characterized in that: Water tank No. 2 is equipped with a water level sensor, and the water inlet of water tank No. 2 is equipped with a water supply solenoid valve, which is connected to the water level sensor in water tank No. 2.

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