Invention relates to stratum ventilation systems with annular air inlet and air supply method

Abstract

The invention pertains to the field of ventilation, introducing a stratum ventilation system with annular air inlet and air supply method. This system includes a fresh air element, a return air element, and an air supply element, all coordinated by a center console. The air supply element comprises a fresh air, a return air and a supply air section. The annular structure of the air supply section consists of an inner and an outer annular air duct. The return air element includes a return air outlet and a return air handling unit, while the fresh air element encompasses a fresh air inlet and handling unit. This invention provides return air to envelop the fresh air's annular structure, effectively extending the fresh air jet's core area to the occupied zone, thereby minimizing draft risks and reducing air mixing and energy consumption.

Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims the priority of Chinese Patent Application No., entitled “The invention relates to a stratum ventilation system with annular air inlet and an air supply method”, filed on.BACKGROUND OF THE INVENTION1. Field of the Invention

[0002] The invention relates to the technical field of ventilation, and particularly to a stratum ventilation system with annular air inlet and an air supply method.2. Description of Related Art

[0003] As a non-uniform environment construction technology, stratum ventilation can ensure the air quality and thermal comfort of occupied zone with relatively low energy consumption. Stratum ventilation can be used in other public buildings such as offices and classrooms, but has some drawbacks for larger applications. Due to the phenomenon of cold air falling and hot air rising caused by thermal buoyancy, indoor air is easy to form environmental control stratification in occupied zones with the increase of range. Far away from the air outlet area, the indoor air temperature uneven increase, resulting in less air flow in the indoor occupied zone, resulting in a significant decline in air quality and human comfort. In the application of stratum ventilation in large space, the range of the jet core area can be extended by increasing the air supply speed, but it will increase a significant sense of draft risk in the area closer to the air supply inlet, resulting in a significant reduction of human comfort in the occupied zone and a consumption of energy.

[0004] In the prior art, with the increase of the supply range of the fresh air of the stratum ventilation system leads to entrainment, thereby reducing the air supply quality of the occupied zone.SUMMARY OF THE INVENTION

[0005] Accordingly, technical problem that the invention hopes to solve is that the existing stratum ventilation is affected by buoyancy and dynamic factors, and with the increase of range, the decrease of air quality and speed attenuation, and the increase of air supply speed lead to the increase of draft risk.

[0006] In order to solve the above technical problems, the invention provides a stratum ventilation system with annular air inlet and an air supply method. The system comprises a fresh air element, a return air element, an air supply element and a central control console. The fresh air element, the return air element and the supply air element are electrically connected with the central control console. The air supply element is installed in one wall of the room, comprising a fresh air section, a return air section and an air supply section. One end of the air supply section is connected with the room, and the other end is connected with the through the fresh air section. The air supply section is connected above the return air section, and the air supply section is connected with the return air element through the return air section.

[0007] In one embodiment, the air supply section is an annular structure formed by an inner annular air duct located in the center and an outer annular air duct located outside the inner annular air duct. The inner annular air duct is connected with the fresh air section, the outer annular air duct is connected with the return air section, and the inner annular air duct is closed between one end of the fresh air section and the outer annular air duct. The return air element is installed above the ceiling in the room, and is composed of a return air outlet, a second return air pipe, a return air handling unit and a first air pipe successively connected. The first primary air duct is connected with the return air section. The fresh air element is composed of a fresh air inlet, a fresh air handling unit and a fresh air pipe, and the fresh air pipe is connected with the fresh air section at one end away from the fresh air handling unit.

[0008] In an embodiment, the air supply section is an annular structure, and the air supply section is formed by an inner annular air duct located in the middle and an outer annular air duct located outside the inner annular air duct. The inner annular air duct is connected with the fresh air section, the outer annular air duct is connected with the return air section, and the inner annular air duct is a closed structure between one end of the fresh air section and the outer annular air duct. The return air element is installed above the ceiling in the room, and is composed of a return air outlet, a second return air pipe, a return air handling unit and a first air pipe successively connected. The first primary air duct is connected with the return air section. The fresh air element is composed of a fresh air inlet, a fresh air handling unit and a fresh air pipe successively connected, and the fresh air pipe is connected with the fresh air section at one end away from the fresh air treatment unit.

[0009] In an embodiment, the fresh air handling unit and the return air handling unit are equipped with a temperature and humidity control mechanism. A sensor group is arranged on one side of the fresh air inlet and the return air outlet. The temperature and humidity control mechanism and the sensor group are electrically connected with the central control console. Optionally, the temperature and humidity control mechanism comprise a filter section, a cooling coil, an electrical heater, a humidifying section and a fan. Between the air inlet and outlet of the fresh air handling unit and the return air handling unit, a filter section, a cooling coil, an electrical heater, a humidifying section and a fan are arranged in turn. Electric valves are installed on the cooling coil, electrical heater and humidifying section, and each electric valve is electrically connected with the center console. Optionally, the ceiling is provided with a hole, and the hole is used as a return air outlet to connect the room and the second return air pipe. The second return air pipe comprises three pipes connected by three-way pipe, of which the first pipe is connected with the exhaust outlet, the second pipe is connected with the return air outlet, and the third pipe is connected with the return air handling unit. The exhaust outlet is connected with the outside. Optionally, the second return air duct, the first primary air duct and the fresh air duct are equipped with a regulating valve, and the regulating valve in each tube is electrically connected with the central control console.

[0010] In an embodiment, the sensor group comprises a temperature sensor, a humidity sensor and a speed sensor. The temperature sensor, the humidity sensor and the speed sensor are electrically connected with the central console. One end of the air supply section away from the fresh air section is arranged with a louver tuyere, and the air supply section is connected with the interior through the louver tuyere. Optionally, the inner annular air duct and the outer annular air duct are equipped with a ventilation equalizing plate.

[0011] On the other hand, to achieve the above purpose, the invention still further provides an air supply method of a stratum ventilation system with annular air inlet. Firstly, the stratum ventilation system with annular air inlet is deployed. The outdoor fresh air enters the air supply section of the air supply element through the fresh air element, and the indoor return air enters the air supply section of the air supply element through the return air element. The air supply section makes the indoor return air wrap the outdoor fresh air into the room. According to the climate environment, the fresh air unit, return air element and supply air element in the stratum ventilation system are controlled to realize the adjustment of indoor air environment.

[0012] In an embodiment, when the climate environment is summer or winter, the fresh air element, return air element and supply air element are controlled by the center console to open, so that the outdoor fresh air enters the room through the fresh air element and the supply air element in turn. By adjusting the regulating valve, part of the indoor return air enters the room through the return air element and the air supply element in turn, and the other part is discharged to the outside through the outdoor exhaust outlet. When the indoor return air and outdoor fresh air pass through the fresh air element and the return air element, the sensor group obtains the indoor temperature and humidity data and sends it to the central console. The central console adjusts control mechanism according to the indoor temperature and humidity data, and completes the filtration and heat and humidity handling of the fresh air and return air.

[0013] In an embodiment, when the climate environment is not summer or winter, the outdoor air enthalpy value and the indoor air enthalpy value are compared. When the outdoor air enthalpy value is greater than the indoor air enthalpy value, the temperature and humidity control mechanism is started by the control console, and the opening of the fresh air pipe and the return air pipe is reduced and adjusted. Reduce the air supply volume of the air supply element.

[0014] In an embodiment, when the outdoor air enthalpy value is less than the indoor air enthalpy value, the s cooling coil, electrical heater and humidifying section in the temperature and humidity control mechanism controlled by the center console are closed. The fresh air volume is increased by increasing the opening of the fresh air pipe, and the return air volume is reduced by decreasing the opening of the return air pipe.

[0015] Efficacy can be achieved by the invention is as follows: fresh and return air is sent into the room through the ventilation equalization plate of the fresh air section, the return air section and the supply air section, and the double air grille at the outlet of the supply air section. The advantage is that the return air wraps the fresh air, so that the core area of the fresh air jet is extended around the occupied zone. The stratum ventilation system with annular air inlet solves the technical problems caused byl buoyance force in the stratum ventilation system, such as temperature stratification in the occupied zone, poor air supply quality, inability of fresh air to reach the far occupied zone effectively, and increase the draft risk by increasing the wind speed to extend the range. Moreover, by adding the control mode, the fresh and return air volume of the system can be adjusted according to the climate change, which can improve the adaptability in different temperature and humidity environments and realize energy-saving operation.BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate technical solutions of embodiments of the invention or the prior art, drawings will be used in the description of embodiments or the prior art will be given a brief description below. Apparently, the drawings in the following description only are some of embodiments of the invention, the ordinary skill in the art can obtain other drawings according to these illustrated drawings without creative effort. The drawings that form part of this application are used to provide further understanding of this application, and schematic embodiments of this application and their descriptions are used to interpret this application and do not constitute undue qualification of this application. In the accompanying picture:

[0017] FIG. 1 is a schematic diagram of the stratum ventilation system with annular air inlet provided by the first embodiment of the invention.

[0018] FIG. 2 is a schematic diagram of the air supply element provided by the first embodiment of the invention.

[0019] FIG. 3 is the structural diagram of the fresh air handling unit of the stratum ventilation system provided by the first embodiment of the invention.

[0020] FIG. 4 is the structural diagram of the stratum ventilation system return air handling unit provided by the first embodiment of the invention.

[0021] FIG. 5 is the installation diagram of the double air grille of the stratum ventilation system provided by the first embodiment of the invention.

[0022] FIG. 6 is a schematic diagram of air flow organization of the annular air inlet of the stratum ventilation system provided by the first embodiment of the invention

[0023] Label description: 1—fresh air inlet, 2—temperature sensor, 3—humidity sensor, 4—fresh air duct, 5—filter section, 6—cooling coil, 7—electrical heater, 8—humidifying section, 9—fan, 10—electric valve, 11—regulating valve, 12—fresh air duct, 13—fresh air section, 14—return air section, 15—supply air section, 16—first air duct, 17—speed sensor, 13—fresh air section. 18—movable double air grille, 19—exhaust outlet, 20—return air outlet, 21—second return air duct, 22—data line, 23—center console, 24—inner annular air duct, 25—outer annular air duct, 26—ventilation equalizing plate, 27—fresh air handling unit, 28—return air handling unit, 29—ceiling.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] In the following, with reference to accompanying drawings of embodiments of the invention, technical solutions in the embodiments of the invention will be clearly and completely described. Apparently, the embodiments of the invention described below only are a part of embodiments of the invention, but not all embodiments. Based on the described embodiments of the invention, all other embodiments obtained by ordinary skill in the art without creative effort belong to the scope of protection of the invention.

[0025] In order to facilitate the understanding of the invention, a more comprehensive description of the invention is given below with reference to the relevant attached drawings. However, the invention can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the invention more thorough and comprehensive.

[0026] It should be noted that when a component is said to be “anchored” to another component, it may be directly on another component or it may exist in the middle, when a component is said to be “connected” to another component, it may be directly connected to another component or it may also exist in the middle. The terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only. The words “contain”, “include”, “have”, “contain” and so on used in this article are all open terms, that is, they mean include but are not limited to.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by a person skilled in the technical field belonging to the invention, and the terms used herein in the specification of the invention are only intended to describe specific embodiments and are not intended to limit the invention. The term “and / or” as used herein includes any and all combinations of one or more related listed items.

[0028] It should be noted that the embodiments in this application and the features in the embodiments may be combined with each other, provided that there is no conflict. This application is described in detail below with reference to the attached drawings and in conjunction with embodiments.

[0029] As shown in FIG. 1-6, the present embodiment provides a stratum ventilation system with annular air inlet, comprising a fresh air handling unit, a return air handling unit, a supply air element and a center console 23. The fresh air handling unit, the return air handling unit and the supply air element are electrically connected with the central console 23. The air supply element is installed in one wall of the room and comprises a fresh air section 13, a return air section 14 and a supply air section 15. One end of the air supply section 15 is connected with the room, and the other end is connected with the fresh air handling unit through the fresh air section 13. The air supply section 15 is connected with the return air section 14 above the air supply section 15, and the air supply section 15 is connected with the return air handling unit through the return air section 14. The air supply section 15 has an annular structure, and the air supply section 15 is formed by an inner annular air duct 24 located in the middle and an outer annular air duct 25 located outside the inner annular air duct 24. The inner annular air duct 24 is connected with the fresh air section 13, the outer annular air duct 25 is connected with the return air section 14, and the inner annular air duct 24 is a closed structure between one end of the fresh air section 13 and the outer annular air duct 25. The return air handling unit is installed above the ceiling 29 in the room, and is composed of a return air outlet 20, a second return air pipe 21, a return air handling unit 28 and a first air pipe 16. The first primary air duct 16 is connected with the return air section 14. The fresh air handling unit is composed of a fresh air inlet 1, a fresh air handling unit 27 and a fresh air pipe 2, and one end of the fresh air pipe 2 away from the fresh air handling unit 27 is connected with the fresh air section 13. The fresh air handling unit 27 and the return air handling unit 28 are installed in the temperature and humidity control mechanism. A sensor group is arranged on one side of the fresh air inlet 1 and the return air outlet 20. The temperature and humidity control mechanism and the sensor group are electrically connected with the center console 23.

[0030] Refer to FIG. 1, the fresh air element comprises a fresh air pipe 4 and a fresh air handling unit 27. One end of the fresh air pipe 4 is connected with an outdoor fresh air inlet 1 for introducing fresh air, and the other end is connected with the air inlet of the fresh air handling unit 27. The fresh air handling unit 27 is provided with a primary and middle effect filter section 5, a cooling coil 6, an electrical heater 7, a humidifying section 8, a fan 9 and an electric valve 10. The return air element comprises a return air pipe and a return air handling unit 28. One end of the return air pipe 21 is the return air outlet 20 connected to the room through the ceiling 2, the other end of the return air pipe 21 is connected with the air inlet of the return air handling unit 28. The return air handling unit 28 is provided with a primary and middle effect filter section 5, a cooling coil 6, an electrical heater 7, a humidifying section 8, a fan 9 and an electric valve 10.

[0031] Refer to FIG. 2, the air supply element comprises a supply air section 15, a fresh air section 13, a return air section 14, an outer annular air duct 25 and an inner annular air duct 24. One end of the air supply section 15 is connected with the room, and the other end is closed. The air supply section 15 presents an annular structure, the outer annular air duct 25 and the inner annular air duct 24 are set as integration, and the section shapes of both the outer annular air duct 25 and the inner annular air duct 24 are identical and both are square. The diameter of the outer annular air duct 25 is greater than the diameter of the inner annular air duct 24, the outer annular air duct and the inner annular air duct are equal in length and the axis is consistent. That is, the outer annular air duct 25 wraps the inner annular air duct 24 in an annular structure, and the air supply section 15 inner and outer annular air ducts 24 and 25 are provided with a ventilation equalization plate 26 for uniform air supply. One end of the air supply section 15 is connected with the interior, the outer annular air duct of the other end of the annular structure is closed, and the inner annular air duct is connected with the fresh air section 13. The air supply section 15 is laid horizontally on the side wall of the room. The fresh air and return air at the outlet of the supply air section have the same speed. The axis of the return air section 14 is vertical, and one end is connected with the return air handling unit 28 through the return air pipe 16. The other end of the return air section 14 is connected to the air inlet of the inner annular air pipe of the supply air section 15. The axis of the fresh air section 13 is horizontal, and one end is connected with the fresh air handling unit through the fresh air pipe 12. The other end of fresh air section 13 is connected to the air inlet of the inner annular air duct 24 of supply air section 15. The horizontal inner annular air duct 24 is framed inside the outer annular air duct 25 by the closed end of the air supply section 15.

[0032] In the schematic diagram of the stratum ventilation system in FIG. 1, the ventilation system is provided with a control module, including a sensitive element and a regulating air valve. The regulating air valve mainly comprises an electric valve 10 and a regulating valve 11, the regulating valve 11 is used to regulate the air volume, and the electric valve 10 is used to control the start and stop of the cooling coil 6, the electrical heater 7 and the humidifying section 8. The electric valve 10 and the regulating valve 11 are connected with the center console 23, and accept the opening of the fresh and return air pipeline regulated by the center console 23, and then adjust the fresh and return air volume. The sensitive element comprises a temperature sensor 2 and a humidity sensor 3 arranged at a fresh air inlet 1, a temperature sensor 2 and a speed sensor 17 are arranged at an active double air grille, and a temperature sensor 2 and a humidity sensor 3 are arranged at a return air outlet 18. The center console 23 is electrically connected with the temperature sensor 2, humidity sensor 3, speed sensor 17, cooling coil 6, electrical heater 7 and humidifying section 8 through the data line 22, and the environmental conditions are collected through the sensitive elements to change the working mode of the air conditioning control system.

[0033] An air supply method for a stratum ventilation system with annular air inlet is proposed according to the present embodiment, including the following three situations:

[0034] The outdoor fresh air enters the inner annular air duct (24) of the air supply section (15) of the air supply element through the fresh air handling unit, the indoor return air enters the air supply section (15) of the air supply element through the return air handling unit into the outer annular air duct (25), and the air supply section (15) uses a annular structure to make the indoor return air wrap the outdoor fresh air into the room. According to the climate environment, the fresh air handling unit, return air handling unit and supply air element in the stratum ventilation system are controlled to realize the adjustment of indoor air environment.

[0035] The first case: when the climate environment is summer or winter, the fresh air element, the return air element and the air supply element are opened through the center console 23, so that the outdoor fresh air enters the room through the fresh air handling unit and the air supply element in turn. By adjusting the regulating valve 11, part of the indoor return air enters the room through the return air element and the air supply element in turn, and the other part is discharged to the outside through the outdoor exhaust outlet 19. When the indoor return air and the outdoor fresh air pass through the fresh air element and the return air element, the indoor temperature and humidity data are obtained through the sensor group and sent to the center console 23, the center console 23 adjusts the temperature and humidity control mechanism according to the indoor temperature and humidity data, and completes the filtration treatment and heat and humidity treatment of the indoor return air and the outdoor fresh air.

[0036] The second scenario: When the climate environment is not summer or winter, the outdoor air enthalpy value and the indoor air enthalpy value are compared. When the outdoor air enthalpy value is greater than the indoor air enthalpy value, the temperature and humidity control mechanism is started by the center console 23. And reduce the opening of fresh air duct 4 and return air duct 16 to reduce the air supply element.

[0037] The third case: when the outdoor air enthalpy value is less than the indoor air enthalpy value, the cooling coil 6, electrical heater 7 and humidifying section 8 in the temperature and humidity control mechanism are closed through the center console 23, and the fresh air volume is increased by increasing the opening of the fresh air pipe 4, and the opening of the return air pipe 16 is reduced by reducing the return air volume.

[0038] The working principle and workflow of this embodiment 1 are as follows: When a stratum ventilation system with annular air inlet is in operation, outdoor fresh air enters the fresh air duct 2 through the fresh air inlet 1 through the fan 9, and then enters the room through the cooling coil 6, electrical heater 7 and humidifying section 8, and the fresh air section 13 of the air supply element, the inner annular air duct 24, and the double air grille 18. The indoor return air enters the air return pipe 21 through the air return port 20 of the fan 9, and then enters the air return pipe 21 through the cooling coil 6, electrical heater 7, humidifying section 8, return air section 14, outer annular air pipe 25, and double air grille 18. The air supply section 15 has an annular structure, which integrates the outer annular air duct 25 and the inner annular air duct 24. The inner annular air duct 24 is framed inside the outer annular air duct 25 through the closed end of the air supply section 15, showing the form of return air wrapping fresh air, so that the core area of the fresh air jet is extended around the occupied zone. The ventilation system is equipped with a control module, in which the central console 23 is electrically connected with temperature sensor 2, humidity sensor 3, speed sensor 17, cooling coil 6, electrical heater 7 and humidifying section 8 through data line 22, and collects environmental conditions through sensitive components, changes the working mode of the air conditioning control system, controls and adjusts the air valve to regulate the opening of fresh and return air pipes. Then adjust the fresh and return air volume. In order to improve the adaptability of air conditioning control system in different temperature and humidity environment, to achieve energy saving operation. By installing the tuyere on the side wall at a height of 0.8 m˜1.4 m, fresh air is directly transported to the occupied zone. Each outlet of the stratum ventilation system is responsible for a different area of the room, ensuring the air flow of the occupied zone load with low energy consumption of the air conditioning system. Compared with displacement ventilation and mixed ventilation, the thermal neutral temperature of stratum ventilation is increased by 2.5° C. and 2.0° C. respectively, providing a local thermal comfortable environment in the occupied zone at a thermal neutral temperature of 27° C., reducing the risk of cross contamination in the occupied zone and reducing energy consumption.

[0039] The cooling coil 6, electrical heater 7 and humidifying section 8 of the fresh and return air handling units of the stratum ventilation system with annular vents in this temperature sensor 2 are provided with an electric valve 10. In different operating modes of the air conditioning control system, the valve opening of the cooling coil 6 is controlled, the chilled water volume is adjusted, and the electrical heater 7 and humidifying section 8 are controlled to achieve energy-saving operation of the equipment. When the summer and winter conditions, control the electric valve to open the cooling coil 6, electrical heater 7 and humidifying section 8. Outdoor fresh air from the fresh air inlet 1 into the fresh air pipe 2, through the cooling coil 6, electrical heater 7 and humidifying section 8, after filtration and heat and humidity treatment, the fresh air section 13, inner annular air duct 24 and movable double air grille 18 of the air supply element are sent into the indoor by the fan 9. The indoor return air enters the return air duct 21 through the indoor return air outlet 20, and passes through the cooling coil 6, electrical heater 7 and humidifying section 8 through the regulating valve 11. After filtration and heat and humidity treatment, the return air section 14, outer annular air duct 25 and movable double air grille 18 of the air supply element are sent into the indoor by the fan. Another part of the indoor return air is discharged to the atmospheric environment through the outdoor exhaust outlet 19.

[0040] When the transition season, and the outdoor air enthalpy value is greater than the indoor air enthalpy value, the same as the summer and winter conditions, control the electric valve 10 to open the cooling coil 6, electrical heater 7 and humidifying section 8, the fresh and return air after filtration and heat and humidity treatment, control the regulating valve 11 to adjust the fresh air pipe 4, return air pipe 16 opening, appropriately reduce the air volume, The fresh air section 13 and return air section 14 of the supply air element are fed through fan 9. In the transition season, and the outdoor air enthalpy value is less than the indoor air enthalpy value, control the electric valve to close the cooling coil 6, electrical heater 7 and humidifying section 8, control the regulating valve 11 to adjust the fresh air pipe 4, return air pipe 16 opening, increase the fresh air volume, reduce the return air volume. The filtered fresh air and return air are directly sent to the fresh air section 13 and return air section 14 of the air supply element through fan 9 without heat and humidity treatment. In this case, the fresh air eliminates the indoor waste heat.

[0041] While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.

Claims

1. The utility model relates to a stratum ventilation system with annular air inlet, characterized by comprising a fresh air element, a return air element, a supply air element and a central console, where fresh air element, return air element, and supply air element are electrically connected to central control console; the air supply element is installed in one wall of the room and comprises a fresh air section, a return air section and a supply air section, with one end of supply air section connected to room and the other end is connected with the fresh air element through the fresh air section, supply air section being connected to return air section above supply air section and to return air element through return air section, supply air section having annular structure formed by inner annular air duct in the middle and outer annular air duct outside inner annular air duct, inner annular air duct connected to fresh air section, outer annular air duct connected to return air section, inner annular air duct being closed structure between one end of fresh air section and outer annular air duct; return air element is installed above ceiling and consists of return air outlet, second return air pipe, return air handling unit, and first primary air pipe successively connected, with first primary air pipe connected to return air section; fresh air element consists of fresh air inlet, fresh air handling unit, and fresh air pipe connected successively, with fresh air pipe connected to fresh air section at end away from fresh air handling unit; fresh air handling unit and return air handling unit are equipped with temperature and humidity control mechanism, and sensor group is arranged on one side of fresh air inlet and return air outlet, with temperature and humidity control mechanism and sensor group electrically connected to central console.

2. A stratum ventilation system with annular air inlet described in claim 1 is characterized in that the temperature and humidity control mechanism comprise a filter section, a cooling coil, an electrical heater, a humidifying section and a fan. Between the air inlet end and the air outlet end of the fresh air handling unit and the return air handling unit, the filter section, the cooling coil, the electrical heater, the humidifying section and the fan are successively arranged; electric valves are installed on the cooling coil, electrical heater and humidifying section, and each electric valve is electrically connected with the center console.

3. According to claim 1, a stratum ventilation system with annular air inlet is characterized in that a through hole is provided on the ceiling, and the through hole is used as a return air outlet to connect the room with the second return air pipe.

4. According to claim 3, the stratum ventilation system with annular air inlet is characterized in that the second return air pipe comprises three pipes connected by a tee pipe, the first pipe is connected with the exhaust pipe, the second pipe is connected with the return air outlet, and the third pipe is connected with the return air handling unit, The exhaust outlet is connected with the outside.

5. According to claim 1, a stratum ventilation system with annular air inlet is characterized in that the second return air duct, the first primary air duct and the fresh air duct are installed with regulating valves, and the regulating valves in each tube are electrically connected with the central control console.

6. A stratum ventilation system with annular air inlet described in claim 1 is characterized in that sensor group includes temperature sensor, humidity sensor, and speed sensor, with all sensors electrically connected to central console.

7. The stratum ventilation system with annular air inlet described in claim 1 is characterized in that a movable double air grille is installed at one end of the air supply section away from the fresh air section, and the air supply section is connected with the interior through the movable double air grille.

8. The stratum ventilation system with annular air inlet described in claim 1 is characterized by ventilation equalizing plate installed inside both the inner and outer annular ducts.

9. The air supply method of a stratum ventilation system with an annular air inlet is characterized in that: the outdoor fresh air enters the air supply section of the air supply element through the fresh air element, the indoor return air enters the air supply section of the air supply element through the return air element, and the air supply section makes the indoor return air wrap the outdoor fresh air into the room. and supply air element in stratum ventilation system being controlled according to climate environment to achieve adjustment of indoor air environment.

10. According to the air supply method of a stratum ventilation system with annular air inlet described in claim 9, it is characterized in that the fresh air element, return air element and supply air element in the stratum ventilation system are controlled according to the climate environment, including:When the climate environment is summer or winter, the fresh air element, return air element, and air supply element are opened through the central console, allowing outdoor fresh air to enter the room sequentially through the fresh air element and air supply element, while adjusting the regulating valve so that part of the indoor return air enters the room through the return air element and air supply element, and the remaining air is discharged outside through the outdoor exhaust outlet; as the indoor return air and outdoor fresh air pass through the fresh air and return air elements, indoor temperature and humidity data are collected by the sensor group and sent to the central control console, which then adjusts the temperature and humidity control mechanism based on this data to complete the filtration and heat and humidity treatment of both the indoor return air and the outdoor fresh air;when the climate environment is not summer or winter, the outdoor air enthalpy value and indoor air enthalpy value are obtained, the outdoor air enthalpy value and the indoor air enthalpy value are compared, when the outdoor air enthalpy value is greater than the indoor air enthalpy value, the temperature and humidity control mechanism is started by the control console, and the opening of the fresh air pipe and the return air pipe is reduced and adjusted, Reduce the air supply volume of the air supply element;When the outdoor air enthalpy value is less than the indoor air enthalpy value, the cooling coil, electrical heater and humidifying section in the temperature and humidity control mechanism are closed through the center console, and the fresh air volume is increased by increasing the opening of the fresh air pipe, and the opening of the return air pipe is reduced by reducing the return air volume.

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