Energy-efficient building heating system

Abstract

The application relates to an energy-efficient building heating system, which comprises an air inlet pipe, a rough filter assembly, a waste heat box, a heating box, an air exhaust fan, an air outlet pipe, a fine filter disc and an air return pipe, the waste heat box is provided with a fresh air inlet and an exhaust air outlet, the heating box is provided with a heating inlet and a warm air outlet, the air inlet pipe is communicated with the fresh air inlet, the rough filter assembly is connected to the inner wall of the air inlet pipe, the exhaust air outlet is communicated with the heating inlet, the air inlet of the air exhaust fan is communicated with the warm air outlet, the air outlet of the air exhaust fan is communicated with one end of the air outlet pipe, the other end of the air outlet pipe is used for extending into a room, the fine filter disc is connected to the inner wall of the air outlet pipe, one end of the air return pipe extends into the room, the air return pipe is arranged on the outer wall of the heating box and penetrates through the waste heat box. The air return pipe reduces the temperature difference between the heating box and the external environment, reduces the heat loss of the heating box, the air return pipe exchanges heat with fresh air in the waste heat box, improves the heating efficiency of the fresh air, fully utilizes indoor air waste heat, and reduces energy waste.

Description

Technical Field

[0001] This application relates to the field of architecture, and in particular to a highly efficient and energy-saving building heating, ventilation, and air conditioning system. Background Technology

[0002] Heating, ventilation, and air conditioning (HVAC) is an integral part of building construction. It includes three aspects: heating, ventilation, and air conditioning. Heating is the general term for the technologies, equipment, and services that use artificial methods to supply heat to a room by consuming energy, maintaining the temperature required for living or working. A heating system consists of three main parts: heat medium preparation (heat source), heat medium transportation, and heat medium utilization (heat dissipation equipment). Ventilation improves the indoor air environment through air exchange. Air conditioning aims to create an air environment that meets the needs of human production, daily life, and scientific experiments.

[0003] Typically, buildings use heating and ventilation systems to supply heat to the interior to raise the indoor temperature. However, in order to ensure the health of people living in the building, ventilation is needed to allow for the exchange of indoor and outdoor air and thus ensure fresh indoor air. However, because the indoor temperature is high, the heat will be carried out of the room when exchanging with the outdoor air, resulting in energy waste. Therefore, there is room for improvement. Summary of the Invention

[0004] To reduce energy waste, this application provides a highly efficient and energy-saving building heating and ventilation system.

[0005] The high-efficiency energy-saving building heating and ventilation system provided in this application adopts the following technical solution:

[0006] A high-efficiency and energy-saving building HVAC system includes an air inlet duct, a coarse filter assembly, a waste heat box, a heating box, an exhaust fan, an air outlet duct, a fine filter disc, and a return air duct. The waste heat box is provided with a fresh air inlet and an exhaust air outlet, and the heating box is provided with a heating outlet and a warm air outlet. The air inlet duct is connected to the fresh air inlet, the coarse filter assembly is connected to the inner wall of the air inlet duct, the exhaust air outlet is connected to the heating outlet, the air inlet of the exhaust fan is connected to the warm air outlet, the air outlet of the exhaust fan is connected to one end of the air outlet duct, the other end of the air outlet duct is used to extend into the room, the fine filter disc is connected to the inner wall of the air outlet duct, one end of the return air duct extends into the room, and the return air duct is wrapped around the outer wall of the heating box and passes through the waste heat box.

[0007] By adopting the above technical solution, the return air duct extracts indoor air and is wrapped around the outer wall of the heating box, reducing the temperature difference between the heating box and the external environment and reducing heat loss from the heating box. The heat exchange between the return air duct and the heating box increases the air temperature inside the return air duct. Then, the return air duct passes through the waste heat box and exchanges heat with the fresh air entering the waste heat box, increasing the temperature of the fresh air and improving the heating efficiency of the fresh air entering the heating box. This fully utilizes the waste heat of the indoor air and reduces energy waste.

[0008] Preferably, the return air duct includes a guide duct, a heating coil, and an exhaust duct. The waste heat box is provided with a waste heat cavity. The upper end of the waste heat box is provided with an installation port, and the lower end of the waste heat box is provided with a connection port. The fresh air inlet, exhaust air inlet, installation port, and connection port are all connected to the waste heat cavity. One end of the heating coil is connected to the inner wall of the installation port, and the other end of the heating coil is connected to the inner wall of the connection port. One end of the guide duct extends into the room and is wound around the outer wall of the heating box. The other end of the guide duct is connected to one end of the heating coil, and the other end of the heating coil is connected to the exhaust duct. The heating coil is wound multiple times from top to bottom inside the waste heat cavity.

[0009] By adopting the above technical solutions, the heat coil increases the contact area with air, improves heat exchange efficiency, increases the utilization rate of waste heat, and reduces energy waste.

[0010] Preferably, an energy-efficient building HVAC system further includes a baffle, the return air duct further includes a branch pipe, the upper end of the exhaust duct is provided with a guide port, one end of the branch pipe is connected to the outer wall of the exhaust duct and covers the guide port, the other end of the branch pipe is connected to the inlet air duct, and the baffle is slidably connected to the inner wall of the exhaust duct, the baffle being used to block the guide port.

[0011] By adopting the above technical solution, the baffle slides to cover the guide port, so that all the air and cooling water in the exhaust pipe are discharged. When the baffle slides to open the guide port, the air in the exhaust pipe flows from the split pipe into the air inlet pipe for reuse. When the air temperature in the exhaust pipe is high, the guide port is opened; when the air temperature in the exhaust pipe is low, the guide port is closed, thereby improving the utilization rate of waste heat and reducing energy waste.

[0012] Preferably, an efficient and energy-saving building HVAC system further includes a fixed plate and a spring. The inner wall of the exhaust pipe is provided with a guide groove. The fixed plate is fixedly connected to the baffle and is slidably embedded in the guide groove. One end of the spring is fixedly connected to the fixed plate, and the other end of the spring is fixedly connected to the groove wall of the guide groove.

[0013] By adopting the above technical solution, the guide groove guides the sliding of the fixed plate, so that the fixed plate drives the baffle to slide. The baffle covers the guide port in the initial state. When the air temperature in the exhaust pipe is high, the baffle slides to open the guide port. When the air temperature in the exhaust pipe is low, the spring causes the baffle to reset. The operation is simple.

[0014] Preferably, an efficient and energy-saving building HVAC system further includes a sealing plate, a positioning plate, and a shape memory alloy. The sealing plate is fixedly connected to the inner wall of the exhaust duct and is located on the side of the guide port away from the waste heat box. The sealing plate has a through-hole. The positioning plate is located between the sealing plate and the guide port and is slidably connected to the inner wall of the exhaust duct to cover the through-hole. One end of the shape memory alloy is fixedly connected to the end of the positioning plate away from the sealing plate, and the other end of the shape memory alloy is fixedly connected to the end of the baffle away from the spring.

[0015] By adopting the above technical solution, when the air temperature in the exhaust duct is high, the shape memory alloy deforms due to heat, pushing the baffle to slide, thereby opening the guide port and allowing the air in the exhaust duct to enter the air inlet duct, thus improving energy utilization.

[0016] Preferably, the diversion pipe is located on the side of the coarse filter assembly away from the waste heat box, and the end of the diversion pipe away from the exhaust pipe faces the coarse filter assembly.

[0017] By adopting the above technical solution, the air in the exhaust pipe is filtered by the coarse filter component and then used, reducing impurities in the air. The orientation of the outlet of the diversion pipe makes it less likely for the air in the diversion pipe to obstruct the air entering the intake pipe.

[0018] Preferably, an efficient and energy-saving building HVAC system further includes a humidification box and a humidifier. The humidification box is provided with an air inlet, a humidification outlet and an air outlet. The air inlet is connected to a warm air outlet, the air outlet is connected to an air outlet pipe, the humidifier is connected to the outer wall of the humidification box, the atomizing nozzle of the humidifier is connected to the inner wall of the humidification outlet, and the humidifier is provided with a switch.

[0019] By adopting the above technical solution, the humidifier is used to replenish water to dry air, so that the humidity of the air entering the room is suitable and the user's comfort is improved.

[0020] Preferably, an efficient and energy-saving building HVAC system further includes a transmission component and a stop block. The baffle passes through the exhaust pipe, the stop block is slidably connected to the outer wall of the humidification box, and the stop block is used to stop a switch to control the start of the humidifier. The transmission component is connected to the baffle and the stop block.

[0021] By adopting the above technical solution, the sliding of the baffle causes the sliding of the abutment block, which turns on the switch, starts the humidifier, and the hot air recirculation makes the air relatively dry. Turning on the humidifier replenishes the air with water.

[0022] Preferably, an efficient and energy-saving building heating and ventilation system further includes a heater and a water tank. The heater is provided with a heating chamber, and both the heater and the water tank are located inside the heating chamber. The heater is connected to the water tank to heat the water tank, and the water supply pipe of the humidifier is connected to the water tank.

[0023] By adopting the above technical solution, the humidifier starts by drawing water from the water tank and atomizing it, reducing heat loss from the air in this process and improving energy efficiency.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The return air duct draws indoor air out and is wrapped around the outer wall of the heating box, reducing the temperature difference between the heating box and the external environment and reducing heat loss from the heating box. The heat exchange between the return air duct and the heating box increases the air temperature inside the return air duct. Then, the return air duct passes through the waste heat box and exchanges heat with the fresh air entering the waste heat box, increasing the temperature of the fresh air and improving the heating efficiency of the fresh air entering the heating box. This fully utilizes the waste heat of the indoor air and reduces energy waste.

[0026] 2. The baffle slides to cover the guide port, allowing all the air and cooling water in the exhaust pipe to be discharged. When the baffle slides to open the guide port, the air in the exhaust pipe flows from the split pipe into the air inlet pipe for reuse. When the air temperature in the exhaust pipe is high, the guide port is opened; when the air temperature in the exhaust pipe is low, the guide port is closed, improving the utilization rate of waste heat and reducing energy waste.

[0027] 3. The sliding of the baffle causes the abutment block to slide, which turns on the switch and starts the humidifier. The hot air recirculation makes the air drier, and the humidifier replenishes the air with moisture. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency and energy-saving building heating, ventilation, and air conditioning system.

[0029] Figure 2 This is a schematic diagram of the internal structure of a highly efficient and energy-saving building HVAC system after it has been cut open.

[0030] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0031] Figure 4 This is a cross-sectional view of a highly efficient and energy-saving building heating, ventilation, and air conditioning system.

[0032] Figure 5 This is a schematic diagram of the internal structure of a highly efficient and energy-saving building HVAC system after it has been cut open. It is mainly used to show the control components, transmission components and abutment blocks.

[0033] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0034] Explanation of reference numerals in the attached drawings: 1. Air inlet pipe; 11. First connecting pipe; 111. First annular groove; 12. Second connecting pipe; 121. Second annular groove; 13. Third connecting pipe; 2. Coarse filter assembly; 21. Coarse filter disc; 22. Middle filter disc; 3. Waste heat box; 31. Waste heat chamber; 32. Fresh air inlet; 33. Exhaust outlet; 34. Mounting port; 35. Connection port; 4. Heating assembly; 41. Heating box; 411. Heating chamber; 412. Heating port; 413. Warm air outlet; 414. Through port; 415. Placement port; 42. Cover; 43. Heater; 44. Water tank; 5. Humidification assembly; 51. Humidification box; 511. Humidification chamber; 512. Air inlet; 513. Humidification port; 514. Air outlet; 52. Humidifier; 521. Switch; 61. Exhaust fan; 62. Air outlet pipe 621. Fourth connecting pipe; 622. Fourth annular groove; 623. Fifth connecting pipe; 63. Fine filter disc; 71. Return air duct; 711. Air guide duct; 712. Heat coil; 713. Exhaust duct; 7131. Flow guide port; 7132. Guide groove; 7133. Positioning groove; 714. Diverter pipe; 72. Exhaust fan; 8. Control component; 81. Fixing plate; 82. Baffle; 83. Spring; 84. Sealing plate; 841. Through hole; 85. Positioning plate; 86. Memory alloy; 9. Transmission component; 91. Bracket; 921. First gear; 922. First rack; 93. Fixing column; 94. First synchronous pulley; 95. Mounting bracket; 961. Second gear; 962. Second rack; 97. Rotating column; 98. Second synchronous pulley; 99. Synchronous belt; 10. Abutment block. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0036] This application discloses a high-efficiency energy-saving building heating, ventilation, and air conditioning system. (Refer to...) Figure 1 and Figure 2 A high-efficiency and energy-saving building heating and ventilation system includes an air inlet duct 1, a coarse filter assembly 2, a waste heat box 3, a heating assembly 4, and a humidification assembly 5.

[0037] Reference Figure 3 The air inlet pipe 1 includes a first connecting pipe 11, a second connecting pipe 12, and a third connecting pipe 13. The first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 13 are coaxially fixedly connected in sequence by flanges. The end of the first connecting pipe 11 facing the second connecting pipe 12 is provided with a first annular groove 111, and the end of the second connecting pipe 12 facing the third connecting pipe 13 is provided with a second annular groove 121. The inner diameters of the first connecting pipe 11, the second connecting pipe 12, and the third connecting pipe 13 are all equal. The diameter of the first annular groove 111 and the diameter of the second annular groove 121 are larger than the diameter of the first connecting pipe 11.

[0038] Reference Figure 2and Figure 3 The coarse filter assembly 2 includes a coarse filter disc 21 and a medium filter disc 22. The coarse filter disc 21 is embedded in the first annular groove 111, and the thickness of the coarse filter disc 21 is equal to the depth of the first annular groove 111. The medium filter disc 22 is embedded in the second annular groove 121, and the thickness of the medium filter disc 22 is equal to the depth of the second annular groove 121.

[0039] The waste heat box 3 is provided with a waste heat chamber 31. The side wall of the waste heat box 3 is provided with a fresh air inlet 32 ​​and an exhaust air outlet 33. The fresh air inlet 32 ​​and the exhaust air outlet 33 are located at both ends of the waste heat box 3. The height of the fresh air inlet 32 ​​is lower than the height of the exhaust air outlet 33. The fresh air inlet 32 ​​faces the air inlet pipe 1. The upper end of the waste heat box 3 is provided with an installation port 34. The lower end of the waste heat box 3 is provided with a connection port 35. The fresh air inlet 32, the exhaust air outlet 33, the installation port 34 and the connection port 35 are all connected to the waste heat chamber 31. The end of the third connecting pipe 13 that is away from the second connecting pipe 12 is connected to the fresh air inlet 32.

[0040] Reference Figure 2 The heating assembly 4 includes a heating box 41, a cover 42, a heater 43, and a water tank 44. The heating box 41 has a heating chamber 411. The side wall of the heating box 41 has a heating port 412, a warm air inlet 413, and a passage 414. The heating port 412 and the warm air inlet 413 are located at both ends of the heating box 41. The heating port 412 faces the waste heat box 3, and the height of the heating port 412 is lower than the height of the warm air inlet 413. The heating port 412, the warm air inlet 413, and the passage 414 are all connected to the heating chamber 411. The exhaust port 33 is connected to the heating port 412 through a pipe. The upper end of the heating box 41 is provided with a placement opening 415, which is connected to the heating chamber 411. The cover 42 is fixedly connected to the upper end of the heating box 41 by screws and covers the placement opening 415. The heater 43 and the water tank 44 are both located inside the heating chamber 411. The heater 43 is fixedly connected to the bottom wall of the heating chamber 411, and the water tank 44 is fixedly connected to the upper end of the heater 43.

[0041] The humidification assembly 5 includes a humidification box 51 and a humidifier 52. The humidification box 51 is provided with a humidification chamber 511. The side wall of the humidification box 51 is provided with an air inlet 512, a humidification port 513 and an air outlet 514. The air inlet 512 and the air outlet 514 are located at both ends of the humidification box 51. The humidification port 513 and the air inlet 512 face the heating box 41. The height of the air inlet 512 is less than the height of the air outlet 514. The air inlet 512, the humidification port 513 and the air outlet 514 are all connected to the humidification chamber 511. The warm air outlet 413 and the air inlet 512 are connected by a pipe. The humidifier 52 is fixedly connected to the outer wall of the humidification box 51 facing the heating box 41. The atomizing nozzle of the humidifier 52 is fixedly connected to the inner wall of the humidification port 513. The water supply pipe of the humidifier 52 passes through the port 414 and connects to the water tank 44. A switch 521 is provided at the lower end of the humidifier 52.

[0042] Reference Figure 2 and Figure 4 A high-efficiency energy-saving building heating and ventilation system includes an exhaust fan 61, an air outlet duct 62, a fine filter disc 63, a return air duct 71, an exhaust fan 72, a control component 8, a transmission component 9, and an abutment block 10.

[0043] The air inlet of the exhaust fan 61 is connected to the air outlet 514. The air outlet duct 62 includes a fourth connecting pipe 621 and a fifth connecting pipe 623, which are coaxially fixedly connected by a flange. The end of the fourth connecting pipe 621 facing the fifth connecting pipe 623 has a fourth annular groove 622. The air outlet of the exhaust fan 61 is connected to one end of the fourth connecting pipe 621, and the other end of the fourth connecting pipe 621 extends into the room. A fine filter disc 63 is embedded in the fourth annular groove 622, and the thickness of the fine filter disc 63 is equal to the depth of the fourth annular groove 622.

[0044] The return air duct 71 includes a guide duct 711, a heating coil 712, an exhaust duct 713, and a branch duct 714. The air inlet of the exhaust fan 72 is connected to the room, and the air outlet of the exhaust fan 72 is connected to one end of the guide duct 711. The guide duct 711 is wound multiple times from bottom to top around the outer wall of the heating box 41. One end of the heating coil 712 is fixedly connected to the inner wall of the mounting port 34, and the other end of the heating coil 712 is fixedly connected to the inner wall of the connection port 35. The heating coil 712 is wound multiple times from top to bottom within the waste heat chamber 31. The end of the guide duct 711 furthest from the room is connected to the heating coil. One end of the exhaust pipe 712 and one end of the exhaust pipe 713 are connected to the other end of the heat coil 712. The height of the exhaust pipe 713 is lower than the height of the air inlet pipe 1. The upper end of the exhaust pipe 713 is provided with a guide port 7131. One end of the diversion pipe 714 is connected to the outer wall of the exhaust pipe 713 and covers the guide port 7131. The other end of the diversion pipe 714 extends into the first connecting pipe 11. The pipe opening of the diversion pipe 714 away from the exhaust pipe 713 faces the coarse filter plate 21.

[0045] Reference Figure 5 The control component 8 includes a fixed plate 81, a baffle 82, a spring 83, a sealing plate 84, a positioning plate 85, and a shape memory alloy 86.

[0046] Reference Figure 5 and Figure 6 The inner wall of the exhaust pipe 713 is provided with guide grooves 7132. There are two guide grooves 7132, which are located on both sides of the guide port 7131. The length direction of the guide grooves 7132 is parallel to the length direction of the exhaust pipe 713. The fixing plate 81 is slidably embedded in the guide grooves 7132. The sliding direction of the fixing plate 81 is parallel to the length direction of the guide grooves 7132. The fixing plate 81 is fixedly connected to the baffle 82. The upper surface of the baffle 82 is used to cover the guide port 7131. One end of the spring 83 is fixedly connected to the guide groove 7132 away from the groove wall of the waste heat box 3, and the other end of the spring 83 is fixedly connected to the fixing plate 81.

[0047] The sealing plate 84 is fixedly connected to the inner wall of the exhaust pipe 713. The sealing plate 84 is located on the side of the guide port 7131 away from the waste heat box 3. The sealing plate 84 has a through hole 841. The inner wall of the exhaust pipe 713 has a positioning groove 7133. The positioning groove 7133 is located between the sealing plate 84 and the guide port 7131. There are two positioning grooves 7133. The two positioning grooves 7133 are evenly spaced around the axis of the exhaust pipe 713. The two ends of the positioning plate 85 are slidably embedded in the positioning groove 7133. The sliding direction of the positioning plate 85 is parallel to the length direction of the exhaust pipe 713. The positioning plate 85 is used to cover the through hole 841. One end of the shape memory alloy 86 is fixedly connected to the positioning plate 85, and the other end of the shape memory alloy 86 is fixedly connected to the baffle 82.

[0048] Reference Figure 5 The transmission assembly 9 includes a bracket 91, a first gear 921, a first rack 922, a fixed column 93, a first synchronous pulley 94, a mounting bracket 95, a second gear 961, a second rack 962, a rotating column 97, a second synchronous pulley 98, and a synchronous belt 99.

[0049] The baffle 82 extends from the end opposite to the sealing plate 84 to the drain pipe. The bracket 91 is fixedly connected to the lower end of the waste heat box 3. The first gear 921 is rotatably connected to the bracket 91. The rotation axis of the first gear 921 is horizontal. The first rack 922 is fixedly connected to the end of the baffle 82 opposite to the sealing plate 84. The first rack 922 meshes with the first gear 921. One end of the fixing column 93 is coaxially fixedly connected to the first gear 921. The other end of the fixing column 93 is coaxially fixedly connected to the first synchronous pulley 94.

[0050] Mounting bracket 95 is fixedly connected to the outer wall of humidifying box 51 facing heating box 41. Second gear 961 is rotatably connected to mounting bracket 95. The rotation axis of second gear 961 is parallel to the rotation axis of first gear 921. One end of second rack 962 meshes with second gear 961. The other end of second rack 962 is slidably connected to the outer wall of humidifying box 51. The lower end of abutment block 10 is fixedly connected to the upper end of second rack 962. The upper end of abutment block 10 is used to abut switch 521. One end of rotating column 97 is coaxially fixedly connected to second gear 961. The other end of rotating column 97 is fixedly connected to second synchronous pulley 98. Synchronous belt 99 is sleeved on the outer periphery of first synchronous pulley 94 and second synchronous pulley 98.

[0051] The implementation principle of a high-efficiency energy-saving building HVAC system according to an embodiment of this application is as follows: the exhaust fan 61 draws outside air into the HVAC system, filters it through the coarse filter component 2, completes preliminary heat exchange in the waste heat box 3, and completes further heating in the heating box 41. After being filtered by the fine filter disc 63, the air is introduced into the room. The exhaust fan 72 exhausts the indoor air. The exhaust air passes through the outer wall of the heating box 41 and then enters the heating coil 712, so that the waste heat is fully utilized. If the air temperature is higher than the set value, the shape memory alloy 86 deforms to seal the through-hole 841 and open the guide port 7131. The air flows back from the diversion pipe 714 to the air inlet pipe 1 and mixes with the outside fresh air for reuse. At this time, the air is relatively dry. While the shape memory alloy 86 deforms, it pushes the baffle 82 to slide. The transmission component 9 controls the abutment block 10 to open and close the humidifier 52 to humidify the air.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high efficiency, energy saving building heating, ventilation and air conditioning system, characterized by: The air inlet pipe (1), the rough filter assembly (2), the waste heat box (3), the heating box (41), the air extractor (61), the air outlet pipe (62), the fine filter disc (63) and the air return pipe (71) are connected, the waste heat box (3) is provided with the fresh air inlet (32) and the exhaust air outlet (33), the heating box (41) is provided with the heating inlet (412) and the warm air outlet (413), the air inlet pipe (1) is communicated with the fresh air inlet (32), the rough filter assembly (2) is connected to the inner wall of the air inlet pipe (1), the exhaust air outlet (33) is communicated with the heating inlet (412), the air inlet of the air extractor (61) is communicated with the warm air outlet (413), the air outlet of the air extractor (61) is communicated with one end of the air outlet pipe (62), the other end of the air outlet pipe (62) is used for extending into a room, the fine filter disc (63) is connected to the inner wall of the air outlet pipe (62), one end of the air return pipe (71) extends into the room, and the air return pipe (71) is arranged on the outer wall of the heating box (41) and penetrates the waste heat box (3); The air return pipe (71) comprises the air guide pipe (711), the heat coil (712) and the exhaust air pipe (713), the waste heat box (3) is provided with the waste heat cavity (31), the upper end of the waste heat box (3) is provided with the mounting port (34), the lower end of the waste heat box (3) is provided with the connecting port (35), the fresh air inlet (32), the exhaust air outlet (33), the mounting port (34) and the connecting port (35) are all communicated with the waste heat cavity (31), one end of the heat coil (712) is connected to the inner wall of the mounting port (34), the other end of the heat coil (712) is connected to the inner wall of the connecting port (35), one end of the air guide pipe (711) extends into the room, the air guide pipe (711) is arranged on the outer wall of the heating box (41), the other end of the air guide pipe (711) is communicated with one end of the heat coil (712), the other end of the heat coil (712) is communicated with the exhaust air pipe (713), and the heat coil (712) is arranged in the waste heat cavity (31) in multiple turns from top to bottom; The baffle (82) is further arranged, the air return pipe (71) further comprises the shunt pipe (714), the upper end of the exhaust air pipe (713) is provided with the air guide port (7131), one end of the shunt pipe (714) is connected to the outer wall of the exhaust air pipe (713) and covers the air guide port (7131), the other end of the shunt pipe (714) is communicated with the air inlet pipe (1), and the baffle (82) is slidingly connected to the inner wall of the exhaust air pipe (713); the baffle (82) is used for blocking the air guide port (7131); The fixed plate (81) and the spring (83) are further arranged, the inner wall of the exhaust air pipe (713) is provided with the guide groove (7132), the fixed plate (81) is fixedly connected to the baffle (82), the fixed plate (81) is slidingly embedded in the guide groove (7132), one end of the spring (83) is fixedly connected to the fixed plate (81), and the other end of the spring (83) is fixedly connected to the groove wall of the guide groove (7132). Further include sealing plate (84), positioning plate (85) and memory alloy (86), the sealing plate (84) is fixedly connected to the inner wall of the exhaust pipe (713), the sealing plate (84) is located at the side of the flow guide port (7131) away from the waste heat box (3), the sealing plate (84) is provided with a through hole (841), the positioning plate (85) is located between the sealing plate (84) and the flow guide port (7131), the positioning plate (85) is slidingly connected to the inner wall of the exhaust pipe (713) for covering the through hole (841), one end of the memory alloy (86) is fixedly connected to the end of the positioning plate (85) away from the sealing plate (84), the other end of the memory alloy (86) is fixedly connected to the end of the baffle (82) away from the spring (83).

2. A high efficiency, energy saving, building heating, ventilating and air conditioning system according to claim 1, wherein: The shunt pipe (714) is located at the side of the rough filter assembly (2) away from the waste heat box (3), and the pipe opening of the shunt pipe (714) away from the exhaust pipe (713) is directed towards the rough filter assembly (2).

3. A high efficiency, energy saving, building heating, ventilating and air conditioning system according to claim 1 wherein: An efficient and energy-saving building heating system further comprises a humidifying box (51) and a humidifier (52), the humidifying box (51) is provided with an air inlet (512), a humidifying port (513) and an air outlet (514), the air inlet (512) is communicated with the warm air outlet (413), the air outlet (514) is communicated with the air outlet pipe (62), the humidifier (52) is connected to the outer wall of the humidifying box (51), the atomizing nozzle of the humidifier (52) is connected to the inner wall of the humidifying port (513), and the humidifier (52) is provided with a switch (521).

4. A high efficiency, energy saving, building heating, ventilating and air conditioning system according to claim 3 wherein: An efficient and energy-saving building heating system further comprises a transmission assembly (9) and an abutting block (10), the baffle (82) penetrates the exhaust pipe (713), the abutting block (10) is slidingly connected to the outer wall of the humidifying box (51), the abutting block (10) is used for abutting the switch (521), so as to control the start of the humidifier (52), and the transmission assembly (9) is connected to the baffle (82) and the abutting block (10).

5. A high efficiency, energy saving, building heating and ventilation system according to claim 4 wherein: An efficient and energy-saving building heating system further comprises a heater (43) and a water tank (44), the heating tank (41) is provided with a heating cavity (411), the heater (43) and the water tank (44) are arranged in the heating cavity (411), the heater (43) is connected to the water tank (44) to heat the water tank (44), and the water supply pipe of the humidifier (52) is communicated with the water tank (44).

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