An indoor oxygen concentration rapid regulation device and its regulation method

Abstract

The present invention discloses an indoor oxygen concentration rapid regulation device and its regulation method. Under normal circumstances, it adopts the indoor air circulation and purification mode to complete the circulation and purification of indoor air; when the oxygen concentration in the room decreases due to the lack of fresh air entering for a long time, it enters the fresh air and air purification coupling mode, while purifying the indoor air, supplementing outdoor fresh air into the room, and gradually increasing the oxygen concentration in the room; if people gather indoors and quickly consume the indoor oxygen, resulting in a rapid decrease in the indoor oxygen concentration, and when the oxygen input by the fresh air and air purification coupling mode cannot maintain the indoor oxygen demand, it enters the outdoor fresh air purification mode, and a large amount of outdoor fresh air enters the room after purification, while a large amount of carbon dioxide in the indoor air is discharged outdoors, so as to rapidly increase the oxygen concentration of the indoor air; the present invention utilizes the existing fresh air coupling system to achieve rapid regulation of the indoor oxygen concentration without adding expensive equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of indoor air purification equipment, and relates to an indoor oxygen concentration rapid regulation device and a regulation method thereof. Background Art

[0002] For traditional air purifiers, when in use, doors and windows need to be closed and the room is in a sealed state. Although they can purify the indoor air, however, without fresh air entering, indoor personnel consume oxygen, and after long-term use, oxygen gradually decreases and the oxygen concentration in the room drops. The consequences are: in the light case, dizziness, listlessness; in the severe case, headache, nausea, retching; seriously, it can cause shock and even death.

[0003] Currently, a fresh air coupling system is usually adopted in the market to supplement oxygen to the room. It mainly inputs the outdoor air and the indoor air into the room after purification and coupling. It can not only remove indoor pollution and purify the indoor air, but also increase the oxygen content in the indoor air. However, for rooms with a high concentration of people, such as schools, kindergartens, nurseries, meeting rooms, shopping malls, etc., due to a large amount of oxygen consumption by people, the fresh air coupling system needs to increase the oxygen in the room by increasing the rotation speed of the fresh air fan and increasing the fresh air volume. However, this method is limited by the function of the fan and cannot quickly increase the oxygen concentration in the room. Summary of the Invention

[0004] The purpose of the present invention is to provide an indoor oxygen concentration rapid regulation device and a regulation method thereof, which utilize the existing fresh air coupling system to rapidly regulate the oxygen concentration in the room without adding expensive equipment.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] An indoor oxygen concentration rapid regulation device includes a first purification cavity and a second purification cavity. The air inlet end of the first purification cavity is connected to the air inlet channel of the total heat exchanger through a first air inlet pipe, and the air inlet channel of the total heat exchanger is connected to an external air inlet.

[0007] The middle part of the first air inlet pipe is connected with a second air inlet pipe, and the second air inlet pipe is connected to a first internal air inlet.

[0008] The air inlet end of the second purification cavity is connected with a third air inlet pipe, and the third air inlet pipe is connected to a second internal air inlet.

[0009] The air outlet end of the first purification cavity is connected to the first air inlet end of the Y-shaped coupling pipe through a first air outlet pipe, and the air outlet end of the second purification cavity is connected to the second air inlet end of the Y-shaped coupling pipe through a second air outlet pipe.

[0010] The middle part of the second air outlet pipe is connected to the air outlet channel of the total heat exchanger through a third air outlet pipe, and the air outlet channel of the total heat exchanger is connected to an external air outlet.

[0011] The air outlet end of the Y-shaped coupling pipe is connected to an internal air outlet arranged indoors.

[0012] Further, a first fan and a first air purifier are arranged inside the first purification cavity, and a second fan and a second air purifier are arranged inside the second purification cavity.

[0013] Further, a first solenoid valve is arranged between the first air inlet pipe and the total heat exchanger, a second solenoid valve is arranged between the second air inlet pipe and the first internal air inlet, a third solenoid valve is arranged between the second air outlet pipe and the Y-shaped coupling pipe, and a fourth solenoid valve is arranged between the second air outlet pipe and the third air outlet pipe.

[0014] Further, during operation, it includes three working modes: indoor air circulation purification mode, fresh air purification coupling mode, and outdoor fresh air purification mode, and is controlled by a control system.

[0015] Further, the control system includes an oxygen detection sensor, a central processor, a human-computer interaction module, a mode selection module, and a control output module;

[0016] The oxygen detection sensor is used to collect real-time indoor oxygen concentration data and send it to the central processor;

[0017] The central processor receives the indoor oxygen concentration data output by the oxygen detection sensor, and according to a preset oxygen concentration threshold, sends a control signal to the mode selection module to select a working mode;

[0018] The human-computer interaction module is used to pre-enter the oxygen concentration thresholds of each working mode of the device for the central processor to call;

[0019] The mode selection module selects a working mode according to the control signal output by the central processor and outputs it to the control output module.

[0020] The control output module outputs control instructions for the corresponding mode according to the working mode selected by the mode selection module to control the operation of the device.

[0021] The regulation method of the indoor oxygen concentration rapid regulation device specifically includes the following steps:

[0022] Step S1: After the indoor oxygen concentration rapid regulation device is powered on, it defaults to enter the indoor air circulation and purification mode. The control system outputs control instructions to control the first fan and the first air purifier to power off, control the second fan and the second air purifier to power on and work. At the same time, close the first solenoid valve, the second solenoid valve and the fourth solenoid valve, and open the third solenoid valve. At this time, indoor air is sucked into the second purification cavity from the second internal air inlet under the action of the second fan, purified by the second air purifier, and then discharged into the room through the second air outlet pipe and the Y-shaped coupling pipe from the internal air outlet. During this process, steps S2 - S3 are synchronously executed;

[0023] Step S2: The oxygen detection sensor continuously collects the oxygen concentration data in the room and sends it to the central processor;

[0024] Step S3: The central processor analyzes the received oxygen concentration data. When the indoor oxygen concentration is higher than the preset first threshold, step S1 is executed. When the indoor oxygen concentration is lower than the preset first threshold and higher than the preset second threshold, step S4 is executed. When the indoor oxygen concentration is lower than the preset second threshold, step S5 is executed;

[0025] Step S4: Enter the fresh air and air purification coupling mode. The control system outputs control instructions to control the first fan and the first air purifier to power on and work, control the second fan and the second air purifier to power off. At the same time, open the first solenoid valve and the second solenoid valve, close the third solenoid valve and the fourth solenoid valve. At this time, under the action of the first fan, indoor air is sucked in from the first internal air inlet, enters the first purification cavity through the second air inlet pipe and the first air inlet pipe, and outdoor air is sucked in from the external air inlet and enters the first purification cavity through the first air inlet pipe. After being purified by the first air purifier, it is discharged into the room through the first air outlet pipe and the Y-shaped coupling pipe from the internal air outlet. During this process, steps S2 - S3 are synchronously executed;

[0026] Step S5: Enter the outdoor fresh air purification mode. The control system outputs control instructions to control the first fan, the second fan and the first air purifier to power on and work, control the second air purifier to power off. At the same time, open the first solenoid valve and the fourth solenoid valve, close the second solenoid valve and the third solenoid valve. At this time, under the action of the first fan, outdoor air is sucked in from the external air inlet, enters the first purification cavity through the first air inlet pipe, and after being purified by the first air purifier, it is discharged into the room through the first air outlet pipe and the Y-shaped coupling pipe from the internal air outlet. Indoor air is sucked into the second purification cavity from the second internal air inlet under the action of the second fan, and is discharged outdoors through the second air outlet pipe and the third air outlet pipe from the external air outlet. During this process, steps S2 - S3 are synchronously executed.

[0027] Advantages of the present invention: The indoor oxygen concentration rapid regulation device and its regulation method provided by the present invention adopt an indoor air circulation and purification mode under normal circumstances to complete the circulation and purification of indoor air; when the oxygen concentration in the room drops due to the lack of fresh air entering for a long time, it enters a fresh air and air purification coupling mode, while purifying the indoor air, supplementing outdoor fresh air into the room, and gradually increasing the oxygen concentration in the room; if people gather indoors and quickly consume the oxygen in the room, resulting in a rapid drop in the indoor oxygen concentration, and the oxygen input by the fresh air and air purification coupling mode cannot maintain the indoor oxygen demand, it enters an outdoor fresh air purification mode, and a large amount of outdoor fresh air enters the room after purification, while a large amount of carbon dioxide in the indoor air is discharged outdoors, thereby rapidly increasing the oxygen concentration of the indoor air; the present invention utilizes the existing fresh air coupling system to achieve rapid regulation of the indoor oxygen concentration without adding expensive equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Figure 1 is a schematic structural diagram of the present invention.

[0030] Figure 2 is a schematic diagram of the control system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0033] As Figure 1 shown, the present invention provides an indoor oxygen concentration rapid regulation device, including a first purification cavity 1 and a second purification cavity 2 arranged indoors. Among them, a first fan 101 and a first air purifier 102 are arranged inside the first purification cavity 1, and a second fan 201 and a second air purifier 202 are arranged inside the second purification cavity 2.

[0034] The intake end of the first purification chamber 1 is connected to the intake channel of the total heat exchanger 4 through the first intake pipe 3, and the other end of the intake channel of the total heat exchanger 4 is connected to the external intake port 5 arranged outdoors.

[0035] The middle of the first intake pipe 3 is connected with a second intake pipe 6, and the second intake pipe 6 is connected to the first internal intake port 7 arranged indoors.

[0036] The intake end of the second purification chamber 2 is connected with a third intake pipe 8, and the third intake pipe 8 is connected to the second internal intake port 9 arranged indoors.

[0037] The outlet end of the first purification chamber 1 is connected to the first intake end of the Y-shaped coupling pipe 11 through the first outlet pipe 10, and the outlet end of the second purification chamber 2 is connected to the second intake end of the Y-shaped coupling pipe 11 through the second outlet pipe 12.

[0038] The middle of the second outlet pipe 12 is connected to the outlet channel of the total heat exchanger 4 through a third outlet pipe 13, and the other end of the outlet channel of the total heat exchanger 4 is connected to the external outlet port 14 arranged outdoors.

[0039] The outlet end of the Y-shaped coupling pipe 11 is connected to the internal outlet port 15 arranged indoors.

[0040] Wherein, a first electromagnetic valve 16 is arranged between the first intake pipe 3 and the total heat exchanger 4, a second electromagnetic valve 17 is arranged between the second intake pipe 6 and the first internal intake port 7, a third electromagnetic valve 18 is arranged between the second outlet pipe 12 and the Y-shaped coupling pipe 11, and a fourth electromagnetic valve 19 is arranged between the second outlet pipe 12 and the third outlet pipe 13.

[0041] When the indoor oxygen concentration rapid regulation device provided by the present invention works, it includes three working modes, namely the indoor air circulation purification mode, the fresh air purification coupling mode, and the outdoor fresh air purification mode, and is controlled by its control system.

[0042] As Figure 2 shown, a control system of an indoor oxygen concentration rapid regulation device includes an oxygen detection sensor, a central processor, a human-computer interaction module, a mode selection module, and a control output module.

[0043] Wherein, the oxygen detection sensor is installed indoors and is used to collect the indoor oxygen concentration data in real time and send it to the central processor.

[0044] The central processor receives the indoor oxygen concentration data output by the oxygen detection sensor, and according to the preset oxygen concentration threshold, sends a control signal to the mode selection module to select the corresponding working mode.

[0045] The human-computer interaction module is used to pre-enter the oxygen concentration thresholds for each working mode of the device for the central processor to call.

[0046] The mode selection module selects the corresponding working mode according to the control signal output by the central processor and outputs it to the control output module. Among them, the working modes include the indoor air circulation purification mode, the fresh air and air purification coupling mode, and the outdoor fresh air purification mode.

[0047] The control output module outputs the control instructions for the corresponding mode according to the working mode selected by the mode selection module to control the operation of the device.

[0048] Specifically, when the oxygen detection sensor detects that the indoor oxygen concentration is higher than the preset first threshold, the system selects to enter the indoor air circulation purification mode, outputs control instructions to control the first fan 101 and the first air purifier 102 to cut off the power supply, controls the second fan 201 and the second air purifier 202 to be powered on and work, and at the same time closes the first solenoid valve 16, the second solenoid valve 17 and the fourth solenoid valve 19, and opens the third solenoid valve 18. At this time, the indoor air is sucked into the second purification cavity 2 from the second internal air inlet 9 under the action of the second fan 201, purified by the second air purifier 202, and then discharged into the room from the internal air outlet 15 through the second air outlet pipe 12 and the Y-shaped coupling pipe 11, completing the circulation purification of the indoor air, ensuring the stability of the indoor temperature and humidity environment, and reducing the energy consumption of equipment such as air conditioners.

[0049] When the oxygen detection sensor detects that the indoor oxygen concentration is lower than the preset first threshold and higher than the preset second threshold, the system selects to enter the fresh air and air purification coupling mode, outputs control instructions to control the first fan 101 and the first air purifier 102 to be powered on and work, controls the second fan 201 and the second air purifier 202 to cut off the power supply, and at the same time opens the first solenoid valve 16 and the second solenoid valve 17, closes the third solenoid valve 18 and the fourth solenoid valve 19. At this time, under the action of the first fan 101, the indoor air is sucked into the first purification cavity 1 from the first internal air inlet 7, passes through the second air inlet pipe 6 and the first air inlet pipe 3, and the outdoor air is sucked into the first purification cavity 1 from the external air inlet 5, passes through the first air inlet pipe 3, purified by the first air purifier 102, and then discharged into the room from the internal air outlet 15 through the first air outlet pipe 10 and the Y-shaped coupling pipe 11. While purifying the indoor air, outdoor fresh air is supplemented into the room to increase the oxygen concentration in the room. Since there is outdoor fresh air sent into the room but no fan to extract the indoor air outdoors, the slightly positive pressure generated indoors will slowly discharge the indoor air from the original pores in the room space outdoors, and at the same time will also block the entry of outdoor polluted air into the room, and the air blown out from the internal air outlet 15 combines the purified outdoor fresh air and the indoor air, and its temperature and humidity change little.

[0050] When the oxygen detection sensor detects that the indoor oxygen concentration is lower than the preset second threshold, the system selects to enter the outdoor fresh air purification mode, outputs a control instruction to control the first fan 101, the second fan 201 and the first air purifier 102 to be powered on for operation, controls the second air purifier 202 to be powered off, and at the same time opens the first solenoid valve 16 and the fourth solenoid valve 19, and closes the second solenoid valve 17 and the third solenoid valve 18. At this time, under the action of the first fan 101, outdoor air is inhaled from the external air inlet 5, enters the first purification cavity 1 through the first air inlet pipe 3, is purified by the first air purifier 102, and then is discharged into the room through the first air outlet pipe 10 and the Y-shaped coupling pipe 11 from the internal air outlet 15. Indoor air is inhaled into the second purification cavity 2 from the second internal air inlet 9 under the action of the second fan 201, and is discharged outdoors through the second air outlet pipe 12 and the third air outlet pipe 13 from the external air outlet 14. At this time, a large amount of outdoor fresh air enters the room after purification, and a large amount of carbon dioxide in the indoor air is discharged outdoors, so that the oxygen concentration of the indoor air is rapidly increased, realizing rapid regulation. At the same time, the outdoor fresh air entering the room and the indoor air discharged outdoors complete the temperature and humidity exchange in the total heat exchanger 4, and the temperature and humidity of the indoor air are kept stable as much as possible.

[0051] A control method for a device for rapidly regulating indoor oxygen concentration specifically includes the following steps:

[0052] Step S1, after the device for rapidly regulating indoor oxygen concentration is powered on, it defaults to enter the indoor air circulation purification mode. The control system outputs a control instruction to control the first fan 101 and the first air purifier 102 to be powered off, controls the second fan 201 and the second air purifier 202 to be powered on for operation, and at the same time closes the first solenoid valve 16, the second solenoid valve 17 and the fourth solenoid valve 19, and opens the third solenoid valve 18. At this time, indoor air is inhaled into the second purification cavity 2 from the second internal air inlet 9 under the action of the second fan 201, is purified by the second air purifier 202, and is discharged into the room through the second air outlet pipe 12 and the Y-shaped coupling pipe 11 from the internal air outlet 15. During this process, steps S2 - S3 are synchronously executed.

[0053] Step S2, the oxygen detection sensor continuously collects the oxygen concentration data in the room and sends it to the central processor.

[0054] Step S3, the central processor analyzes the received oxygen concentration data. When the indoor oxygen concentration is higher than the preset first threshold, step S1 is executed. When the indoor oxygen concentration is lower than the preset first threshold and higher than the preset second threshold, step S4 is executed. When the indoor oxygen concentration is lower than the preset second threshold, step S5 is executed.

[0055] Step S4, enter the fresh air and air purification coupling mode. The control system outputs control instructions to control the first fan 101 and the first air purifier 102 to be powered on and work, control the second fan 201 and the second air purifier 202 to be powered off, and at the same time open the first solenoid valve 16 and the second solenoid valve 17, and close the third solenoid valve 18 and the fourth solenoid valve 19. At this time, under the action of the first fan 101, indoor air is inhaled from the first internal air inlet 7, enters the first purification cavity 1 through the second air inlet pipe 6 and the first air inlet pipe 3, outdoor air is inhaled from the external air inlet 5, enters the first purification cavity 1 through the first air inlet pipe 3, and after being purified by the first air purifier 102, it is discharged into the room through the first air outlet pipe 10 and the Y-shaped coupling pipe 11 from the internal air outlet 15. During this process, steps S2 - S3 are synchronously executed.

[0056] Step S5, enter the outdoor fresh air purification mode. The control system outputs control instructions to control the first fan 101, the second fan 201 and the first air purifier 102 to be powered on and work, control the second air purifier 202 to be powered off, and at the same time open the first solenoid valve 16 and the fourth solenoid valve 19, and close the second solenoid valve 17 and the third solenoid valve 18. At this time, under the action of the first fan 101, outdoor air is inhaled from the external air inlet 5, enters the first purification cavity 1 through the first air inlet pipe 3, and after being purified by the first air purifier 102, it is discharged into the room through the first air outlet pipe 10 and the Y-shaped coupling pipe 11 from the internal air outlet 15. Indoor air is inhaled from the second internal air inlet 9 into the second purification cavity 2 under the action of the second fan 201, and is discharged to the outside through the second air outlet pipe 12 and the third air outlet pipe 13 from the external air outlet 14. During this process, steps S2 - S3 are synchronously executed.

[0057] The indoor oxygen concentration rapid regulation device and its regulation method provided by the present invention usually adopt the indoor air circulation and purification mode to complete the circulation and purification of indoor air; when the oxygen concentration in the room drops due to the lack of fresh air entering for a long time, enter the fresh air and air purification coupling mode, while purifying the indoor air, supplement outdoor fresh air to the room, and gradually increase the oxygen concentration in the room; if people gather indoors and quickly consume the oxygen in the room, resulting in a rapid drop in the indoor oxygen concentration, and when the oxygen input by the fresh air and air purification coupling mode cannot maintain the indoor oxygen demand, enter the outdoor fresh air purification mode, a large amount of outdoor fresh air enters the room after being purified, and a large amount of carbon dioxide in the indoor air is discharged to the outside, so as to rapidly increase the oxygen concentration of the indoor air; the present invention utilizes the existing fresh air coupling system to achieve rapid regulation of the indoor oxygen concentration without adding expensive equipment.

[0058] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0059] The above content is only an example and illustration of the structure of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. An indoor oxygen concentration rapid regulation device, characterized in that, It includes a first purification cavity (1) and a second purification cavity (2). The air inlet end of the first purification cavity (1) is connected to the air inlet channel of a total heat exchanger (4) through a first air inlet pipe (3), and the air inlet channel of the total heat exchanger (4) is connected to an external air inlet (5); The middle part of the first air inlet pipe (3) is connected with a second air inlet pipe (6), and the second air inlet pipe (6) is connected to a first internal air inlet (7); The air inlet end of the second purification cavity (2) is connected with a third air inlet pipe (8), and the third air inlet pipe (8) is connected to a second internal air inlet (9); The air outlet end of the first purification cavity (1) is connected to the first air inlet end of a Y-shaped coupling pipe (11) through a first air outlet pipe (10), and the air outlet end of the second purification cavity (2) is connected to the second air inlet end of the Y-shaped coupling pipe (11) through a second air outlet pipe (12); The middle part of the second air outlet pipe (12) is connected to the air outlet channel of the total heat exchanger (4) through a third air outlet pipe (13), and the air outlet channel of the total heat exchanger (4) is connected to an external air outlet (14); The air outlet end of the Y-shaped coupling pipe (11) is connected to an internal air outlet (15) arranged indoors; A first fan (101) and a first air purifier (102) are arranged inside the first purification cavity (1), and a second fan (201) and a second air purifier (202) are arranged inside the second purification cavity (2); A first solenoid valve (16) is arranged between the first air inlet pipe (3) and the total heat exchanger (4), a second solenoid valve (17) is arranged between the second air inlet pipe (6) and the first internal air inlet (7), a third solenoid valve (18) is arranged between the second air outlet pipe (12) and the Y-shaped coupling pipe (11), and a fourth solenoid valve (19) is arranged between the second air outlet pipe (12) and the third air outlet pipe (13); When it works, it includes three working modes: an indoor air circulation purification mode, a fresh air purification coupling mode, and an outdoor fresh air purification mode, and is controlled by a control system; The control method includes the following steps: Step S1, after the indoor oxygen concentration rapid regulation device is powered on, it defaults to enter the indoor air circulation purification mode. The control system outputs a control instruction to control the first fan (101) and the first air purifier (102) to be powered off, control the second fan (201) and the second air purifier (202) to be powered on and work, and at the same time close the first solenoid valve (16), the second solenoid valve (17), and the fourth solenoid valve (19), and open the third solenoid valve (18). At this time, indoor air is inhaled into the second purification cavity (2) from the second internal air inlet (9) under the action of the second fan (201), purified by the second air purifier (202), and then discharged into the room from the internal air outlet (15) through the second air outlet pipe (12) and the Y-shaped coupling pipe (11). During this process, steps S2 - S3 are synchronously executed; Step S2, the oxygen detection sensor continuously collects the oxygen concentration data in the room and sends it to the central processor; Step S3: The central processor analyzes the received oxygen concentration data. When the indoor oxygen concentration is higher than the preset first threshold, step S1 is executed; when the indoor oxygen concentration is lower than the preset first threshold and higher than the preset second threshold, step S4 is executed; when the indoor oxygen concentration is lower than the preset second threshold, step S5 is executed. Step S4: Enter the fresh air and air purification coupling mode. The control system outputs a control instruction to control the first fan (101) and the first air purifier (102) to be powered on and work, control the second fan (201) and the second air purifier (202) to be powered off, and at the same time open the first solenoid valve (16) and the second solenoid valve (17), and close the third solenoid valve (18) and the fourth solenoid valve (19). At this time, under the action of the first fan (101), indoor air is inhaled from the first internal air inlet (7), enters the first purification cavity (1) through the second air inlet pipe (6) and the first air inlet pipe (3), outdoor air is inhaled from the external air inlet (5), enters the first purification cavity (1) through the first air inlet pipe (3), and after being purified by the first air purifier (102), is discharged into the room through the first air outlet pipe (10) and the Y-shaped coupling pipe (11) from the internal air outlet (15). During this process, steps S2 - S3 are executed synchronously. Step S5: Enter the outdoor fresh air purification mode. The control system outputs a control instruction to control the first fan (101), the second fan (201) and the first air purifier (102) to be powered on and work, control the second air purifier (202) to be powered off, and at the same time open the first solenoid valve (16) and the fourth solenoid valve (19), and close the second solenoid valve (17) and the third solenoid valve (18). At this time, under the action of the first fan (101), outdoor air is inhaled from the external air inlet (5), enters the first purification cavity (1) through the first air inlet pipe (3), and after being purified by the first air purifier (102), is discharged into the room through the first air outlet pipe (10) and the Y-shaped coupling pipe (11) from the internal air outlet (15). Indoor air is inhaled into the second purification cavity (2) from the second internal air inlet (9) under the action of the second fan (201), and is discharged to the outside of the room through the second air outlet pipe (12) and the third air outlet pipe (13) from the external air outlet (14). During this process, steps S2 - S3 are executed synchronously.

2. The rapid indoor oxygen concentration regulation device according to claim 1, characterized in that The control system includes an oxygen detection sensor, a central processor, a human - machine interaction module, a mode selection module, and a control output module. The oxygen detection sensor is used to collect the indoor oxygen concentration data in real - time and send it to the central processor. The central processor receives the indoor oxygen concentration data output by the oxygen detection sensor and sends a control signal to the mode selection module to select the working mode according to the preset oxygen concentration threshold. The human - machine interaction module is used to pre - input the oxygen concentration thresholds of each working mode of the device for the central processor to call. The mode selection module selects the working mode according to the control signal output by the central processor and outputs it to the control output module. The control output module outputs control instructions for the corresponding mode according to the working mode selected by the mode selection module to control the operation of the device.

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