An energy-saving and low-carbon system for heating, ventilation and air conditioning based on composite heat recovery and intelligent regulation

Abstract

The utility model relates to a kind of based on composite heat recovery and intelligent regulation and control's heating ventilation air conditioning energy-saving low-carbon system, including exhaust heat recovery unit, condensing heat recovery unit and air energy heat pump unit, exhaust heat recovery unit includes total heat exchanger and fresh air filtering mechanism, condensing heat recovery unit includes plate heat exchanger and heat preservation water tank, total heat exchanger one input end between with fresh air filtering mechanism output end is provided with input pipe, total heat exchanger one output end between with air energy heat pump unit input end is provided with delivery pipe, plate heat exchanger one output end between with heat preservation water tank input end is provided with water delivery pipe.The utility model is through exhaust heat recovery unit and condensing heat recovery unit, adopt multistage series structure, latent heat in exhaust air, refrigerating unit condensing heat and low-temperature waste water heat are recovered in turn, air energy heat pump unit can promote low-grade heat energy temperature, to significantly reduce the energy consumption of heating ventilation air conditioning system.

Description

Technical Field

[0001] This utility model relates to the field of HVAC technology, and in particular to an energy-saving and low-carbon HVAC system based on composite heat recovery and intelligent control. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) refers to the systems or equipment responsible for heating, ventilation, and air conditioning in indoor or vehicle interiors. The design of HVAC systems applies thermodynamics, fluid mechanics, and fluid machinery, and is an important branch of mechanical engineering. Its purpose is to create an indoor artificial environment beneficial to human survival.

[0003] With the improvement of people's living standards, my country's total building energy consumption has been rising year by year, accounting for as much as 65% of total energy consumption. Among this, heating and air conditioning (HVAC) energy consumption accounts for about 99% of building energy consumption and 20% of total energy consumption. A large number of buildings are constructed in my country every year. It is predicted that by 2015, half of the total number of residential buildings will have been constructed after 2000. However, my country's building energy waste is severe, 3.8 times that of Europe, especially in HVAC systems. The energy consumption of office buildings and industrial manufacturing in China is equivalent to twice the energy consumption of rural residents.

[0004] Existing HVAC systems have the following defects in actual use:

[0005] Most existing HVAC systems use only one heat recovery technology (such as only recovering exhaust heat), which means that the air conditioning system does not fully recover waste heat resources such as exhaust and condensation heat, making it difficult to cover the needs of multiple scenarios, thus resulting in low energy utilization. Utility Model Content

[0006] In view of the fact that most existing HVAC systems use only single heat recovery technology (such as only recovering exhaust heat), the air conditioning system does not fully recover waste heat resources such as exhaust and condensation heat, making it difficult to cover the needs of multiple scenarios and thus resulting in low energy utilization. This utility model provides an energy-saving and low-carbon HVAC system based on composite heat recovery and intelligent control.

[0007] The technical solution adopted by this utility model is: an energy-saving and low-carbon HVAC system based on composite heat recovery and intelligent control, including an exhaust heat recovery unit, a condensation heat recovery unit, and an air source heat pump unit. The exhaust heat recovery unit includes a total heat exchanger and a fresh air filtration mechanism. The condensation heat recovery unit includes a plate heat exchanger and an insulated water tank. An input pipe is provided between one input end of the total heat exchanger and the output end of the fresh air filtration mechanism. A delivery pipe is provided between one output end of the total heat exchanger and the input end of the air source heat pump unit. A water supply pipe is provided between one output end of the plate heat exchanger and the input end of the insulated water tank.

[0008] Furthermore, the fresh air filtration mechanism includes a filter box, a filter screen, an air outlet, and an air inlet. The filter screen is disposed inside the filter box, and the air outlet and the air inlet are respectively disposed on both sides of the filter box.

[0009] Furthermore, the air outlet and the air inlet correspond to each other, and the air outlet and the air inlet are respectively corresponding to the two sides of the filter plate, and one end of the input pipe is connected to the air outlet.

[0010] Furthermore, a cleaning mechanism is provided inside the filter box. The cleaning mechanism is located on one side of the filter screen and includes a fixed bracket, a threaded rod, a drive motor, and a cleaning brush.

[0011] Furthermore, the fixed bracket is fixedly installed on one side of the inner wall of the filter box, and a limiting groove is opened on one side of the fixed bracket. The threaded rod is rotatably installed in the limiting groove, and a limiting slide plate is threadedly installed on the periphery of the threaded rod. The drive motor is fixedly installed on one side of the inner wall of the fixed bracket, and the output end of the drive motor is fixedly connected to one end of the threaded rod. One end of the cleaning brush is fixedly connected to the limiting slide plate.

[0012] Furthermore, a guide bracket is fixedly installed on the other side of the inner wall of the filter box. A guide groove is provided on one side of the guide bracket, and a guide slider is slidably installed in the guide groove. The guide slider is fixedly connected to the other end of the cleaning brush, and the cleaning brush is in contact with the filter screen.

[0013] Furthermore, a pull-out plate is slidably provided on one side of the filter box, and a collection groove is provided on the upper side of the pull-out plate, which corresponds to one side of the cleaning brush and the filter screen.

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

[0015] 1. This utility model adopts a multi-stage series structure through an exhaust heat recovery unit and a condensation heat recovery unit to sequentially recover sensible / latent heat, condensation heat of the refrigeration unit and low-temperature wastewater heat in the exhaust air. The air source heat pump unit can increase the temperature of low-grade heat energy, thereby significantly reducing the energy consumption of the HVAC system.

[0016] 2. Secondly, through the fresh air filtration mechanism, the exhaust heat recovery unit can filter the incoming outside air when it is drawing in outside air for heat exchange, thus preventing impurities in the outside air from entering the total heat exchanger, thereby improving the practicality of the exhaust heat recovery unit.

[0017] 3. This utility model also includes a cleaning mechanism that cleans the impurities intercepted on the filter screen after the fresh air filtration mechanism filters the incoming outside air, preventing the impurities from clogging the filter screen and affecting the air intake effect of the exhaust heat recovery unit, thereby improving the practicality of the fresh air filtration mechanism. Attached Figure Description

[0018] Figure 1 This is a three-dimensional view of the entire utility model;

[0019] Figure 2 This is a three-dimensional view of the exhaust heat recovery unit and air source heat pump unit of this utility model;

[0020] Figure 3 This is a cross-sectional view of the fresh air filtration mechanism of this utility model;

[0021] Figure 4 This is a cross-sectional view of the cleaning mechanism of this utility model.

[0022] The following are labeled in the diagram: 1. Exhaust heat recovery unit; 2. Condensation heat recovery unit; 3. Air source heat pump unit; 4. Total heat exchanger; 5. Fresh air filtration mechanism; 6. Inlet pipe; 7. Delivery pipe; 8. Plate heat exchanger; 9. Insulated water tank; 10. Water supply pipe; 11. Filter box; 12. Filter screen; 13. Air outlet; 14. Air inlet; 15. Cleaning mechanism; 16. Pull-out plate; 17. Collection trough; 18. Fixed bracket; 19. Limiting slide; 20. Threaded rod; 21. Drive motor; 22. Cleaning brush; 23. Limiting slide plate; 24. Guide bracket; 25. Guide slide; 26. Guide slider. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", 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.

[0024] In the description of this utility model, 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following is in conjunction with the appendix Figures 1-4 The present invention will be further described below.

[0026] To address the problems existing in the background technology, this application proposes the following technical solution: an energy-saving and low-carbon HVAC system based on composite heat recovery and intelligent control.

[0027] The specific technical solution includes an exhaust heat recovery unit 1, a condensation heat recovery unit 2, and an air source heat pump unit 3. The exhaust heat recovery unit 1 includes a total heat exchanger 4 and a fresh air filtration mechanism 5. The condensation heat recovery unit 2 includes a plate heat exchanger 8 and an insulated water tank 9. An input pipe 6 is provided between one input end of the total heat exchanger 4 and the output end of the fresh air filtration mechanism 5. A delivery pipe 7 is provided between one output end of the total heat exchanger 4 and the input end of the air source heat pump unit 3. A water delivery pipe 10 is provided between one output end of the plate heat exchanger 8 and the input end of the insulated water tank 9. By connecting the exhaust heat recovery unit 1, the condensation heat recovery unit 2, and the air source heat pump unit 3 to a solar power supply system, solar power can be used preferentially during the day, further reducing energy costs.

[0028] Reference Figure 3As shown, the fresh air filtration mechanism 5 includes a filter box 11, a filter screen 12, an air outlet 13, and an air inlet 14. The filter screen 12 is installed inside the filter box 11. The air outlet 13 and the air inlet 14 are respectively installed on both sides of the filter box 11, with the air outlet 13 and the air inlet 14 corresponding to each other. The air outlet 13 and the air inlet 14 are respectively located on both sides of the filter screen 12. One end of the input pipe 6 is connected to the air outlet 13. When the total heat exchanger 4 draws in external air, the air first enters the filter box 11 through the air inlet 14, and then is filtered by the filter screen 12 inside the filter box 11 before passing through the air outlet 13 and the input pipe 6 to enter the total heat exchanger 4, thereby filtering the drawn-in external air.

[0029] Reference Figure 3 and Figure 4 As shown, a cleaning mechanism 15 is provided inside the filter box 11. The cleaning mechanism 15 is located on one side of the filter screen 12. The cleaning mechanism 15 includes a fixed bracket 18, a threaded rod 20, a drive motor 21, and a cleaning brush 22. The fixed bracket 18 is fixedly installed on one side of the inner wall of the filter box 11. A limit groove 19 is opened on one side of the fixed bracket 18. The threaded rod 20 is rotatably installed in the limit groove 19. A limit slide plate 23 is threadedly installed on the periphery of the threaded rod 20. The drive motor 21 is fixedly installed on one side of the inner wall of the fixed bracket 18. The output end of the drive motor 21 is fixedly connected to one end of the threaded rod 20. One end of the cleaning brush 22 is fixedly connected to the limit slide plate 23. A guide bracket 24 is fixedly installed on the other side of the inner wall of the filter box 11. A guide groove 25 is opened on one side of the guide bracket 24. A guide slider 26 is slidably installed in the guide groove 25. The slider 26 is fixedly connected to the other end of the cleaning brush 22. The cleaning brush 22 is in contact with the filter screen 12. A pull-out plate 16 is slidably provided on one side of the filter box 11. A collection groove 17 is provided on the upper side of the pull-out plate 16. The collection groove 17 corresponds to one side of the cleaning brush 22 and the filter screen 12. By starting the drive motor 21, the threaded rod 20 is driven to rotate. The rotation of the threaded rod 20 can drive the limiting slide plate 23 to move along the limiting slide groove 19. The movement of the limiting slide plate 23 can drive the cleaning brush 22 to move. The movement of the cleaning brush 22 can clean the filter screen 12. The cleaned impurities can fall into the collection groove 17 on the upper side of the pull-out plate 16. The operator can collect and process the impurities by pulling the pull-out plate 16. The guide slider 26 and the guide slide groove 25 can improve the smoothness and stability of the cleaning brush 22 when it moves.

[0030] To ensure that those skilled in the art can fully understand the technical solution, this application provides the following overall overview:

[0031] In operation, the system comprises an exhaust heat recovery unit 1, a condensation heat recovery unit 2, and an air source heat pump unit 3. The exhaust heat recovery unit 1 includes a total heat exchanger 4 and a fresh air filter 5. The condensation heat recovery unit 2 includes a plate heat exchanger 8 and an insulated water tank 9. An inlet pipe 6 connects the fresh air inlet of the total heat exchanger 4 to the fresh air filter 5. A delivery pipe 7 connects the fresh air outlet of the total heat exchanger 4 to the inlet of the air source heat pump unit 3. A water delivery pipe 10 connects the refrigerant outlet of the plate heat exchanger 8 to the inlet of the insulated water tank 9. By connecting the exhaust vent of the air conditioning system to the hot air inlet of the total heat exchanger 4 via a pipe, the hot air exhausted by the air conditioning system can enter the total heat exchanger 4 through the pipe. The total heat exchanger 4 can also draw in outside air through its fresh air inlet. The hot air and fresh air flow in a positive cross-flow pattern through the core of the total heat exchanger 4. A counter-current or cross-flow heat exchange path is formed to heat the fresh air, thereby recovering the sensible / latent heat in the exhaust air. The heated fresh air is then delivered to the air source heat pump unit 3 through the fresh air output end and the delivery pipe 7. The air source heat pump unit 3 increases the temperature of the fresh air to assist the underfloor heating system or other systems for heating, achieving energy-saving effects. During the cooling process of the air conditioning system, the condensation heat generated by the condenser enters the plate heat exchanger 8 through the heat medium input end. At the same time, external refrigerant (such as tap water) is sent into the plate heat exchanger 8 through the refrigerant input end. This allows the heat medium and refrigerant to exchange heat in the plate heat exchanger 8. The heated refrigerant is then delivered to the insulated water tank 9 through the refrigerant output end and the water delivery pipe 10, realizing the recovery of condensation heat for domestic hot water, reducing the energy consumption of the electric heater, and improving the energy-saving effect.

[0032] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A low-carbon, energy-saving HVAC system based on composite heat recovery and intelligent control, characterized in that, The system includes an exhaust heat recovery unit (1), a condensation heat recovery unit (2), and an air source heat pump unit (3). The exhaust heat recovery unit (1) includes a total heat exchanger (4) and a fresh air filtration mechanism (5). The condensation heat recovery unit (2) includes a plate heat exchanger (8) and an insulated water tank (9). An input pipe (6) is provided between one input end of the total heat exchanger (4) and the output end of the fresh air filtration mechanism (5). A delivery pipe (7) is provided between one output end of the total heat exchanger (4) and the input end of the air source heat pump unit (3). A water supply pipe (10) is provided between one output end of the plate heat exchanger (8) and the input end of the insulated water tank (9).

2. The HVAC energy-saving and low-carbon system based on composite heat recovery and intelligent control according to claim 1, characterized in that, The fresh air filtration mechanism (5) includes a filter box (11), a filter screen (12), an air outlet (13) and an air inlet (14). The filter screen (12) is disposed inside the filter box (11), and the air outlet (13) and the air inlet (14) are respectively disposed on both sides of the filter box (11).

3. The HVAC energy-saving and low-carbon system based on composite heat recovery and intelligent control according to claim 2, characterized in that, The air outlet (13) and the air inlet (14) correspond to each other, and the air outlet (13) and the air inlet (14) correspond to the two sides of the filter plate (12) respectively. One end of the input pipe (6) is connected to the air outlet (13).

4. The HVAC energy-saving and low-carbon system based on composite heat recovery and intelligent control according to claim 3, characterized in that, The filter box (11) is provided with a cleaning mechanism (15), which is located on one side of the filter screen (12). The cleaning mechanism (15) includes a fixed bracket (18), a threaded rod (20), a drive motor (21), and a cleaning brush (22).

5. The HVAC energy-saving and low-carbon system based on composite heat recovery and intelligent control according to claim 4, characterized in that, The fixed bracket (18) is fixedly installed on one side of the inner wall of the filter box (11). A limiting groove (19) is opened on one side of the fixed bracket (18). The threaded rod (20) is rotatably installed in the limiting groove (19). A limiting slide plate (23) is threaded on the periphery of the threaded rod (20). The drive motor (21) is fixedly installed on one side of the inner wall of the fixed bracket (18). The output end of the drive motor (21) is fixedly connected to one end of the threaded rod (20). One end of the cleaning brush (22) is fixedly connected to the limiting slide plate (23).

6. The HVAC energy-saving and low-carbon system based on composite heat recovery and intelligent control according to claim 5, characterized in that, A guide bracket (24) is fixedly installed on the other side of the inner wall of the filter box (11). A guide groove (25) is provided on one side of the guide bracket (24). A guide slider (26) is slidably installed in the guide groove (25). The guide slider (26) is fixedly connected to the other end of the cleaning brush (22). The cleaning brush (22) is in contact with the filter screen (12).

7. The HVAC energy-saving and low-carbon system based on composite heat recovery and intelligent control according to claim 6, characterized in that, A pull-out plate (16) is slidably provided on one side of the filter box (11), and a collection groove (17) is provided on the upper side of the pull-out plate (16). The collection groove (17) corresponds to one side of the cleaning brush (22) and the filter screen (12).

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