Air conditioning unit with variable air purification capacity

Abstract

The utility model relates to the technical field of air conditioning units, and provides an air conditioning unit with variable air purification capacity, which comprises an air inlet section, a first filter section, an oxygen supply section, a fan section, a second filter section and an air supply section, a fresh air opening is formed in the air inlet section; the first filtering section and the second filtering section are both used for filtering air; a first air valve and a second air valve are respectively arranged at two ends of the second filter section, the first air valve is communicated with the fan section, and the second air valve is communicated with the air supply section; a bypass section is connected in parallel to two ends of the second filter section, a third air valve and a fourth air valve are respectively arranged at two ends of the bypass section, the third air valve is communicated with the fan section, and the fourth air valve is communicated with the air supply section; the oxygen supply section is communicated with the oxygen generator; an air feeder is arranged in the fan section; the air supply section is provided with an air supply outlet. The air conditioning unit can overcome the technical problems that an air conditioning unit in the prior art is fixed in air purification capacity, cannot adapt to violent fluctuation of outdoor pollutants, is too high in power consumption or insufficient in purification capacity and does not have an oxygen supply function.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning units, in particular to an air-conditioning unit with variable air purification capacity. Background Art

[0002] In order to prevent various pollutants such as suspended particulate matter, viruses and bacteria in the air from polluting the air in the indoor environment, existing air-conditioning units are generally equipped with air purification devices, such as filters and disinfection devices, to intercept and disinfect pollutants; filters and disinfection devices will increase the operating resistance of the air-conditioning unit, but the air purification capacity of existing air-conditioning units is often fixed. If an overly strong air purification device is installed, it will lead to increased operating resistance, energy consumption and operation and maintenance costs of the air-conditioning unit; but if the purification capacity of the air purification device is reduced to reduce the energy consumption of the air-conditioning unit, it will not be possible to ensure the cleanliness of the indoor air when the air pollution is serious, such as sudden smog and epidemics.

[0003] At the same time, existing air-conditioning units often do not include an oxygen supply function, requiring users to set up an oxygen supply system separately. The calculation of the oxygen flow required for oxygen supply is mostly based on the absence of outdoor fresh air. After long-term operation, problems such as increased indoor air pollutants, odor, and dry air will occur. However, if fresh air ventilation is added, the efficiency of the oxygen supply system in increasing oxygen concentration will be reduced, resulting in the indoor oxygen concentration failing to meet the required requirements. Therefore, there is an urgent need to develop an air-conditioning unit with variable air purification capacity to flexibly adapt to fluctuations in outdoor pollutant concentrations. Utility Model Content

[0004] The purpose of the present utility model is to overcome the technical problems in the prior art that the air purification capacity of the air-conditioning unit is fixed, cannot adapt to the drastic fluctuations of outdoor pollutants, either the power consumption is too high or the purification capacity is insufficient, and has no oxygen supply function, and to provide an air-conditioning unit with variable air purification capacity.

[0005] In a first aspect, the utility model provides an air conditioning unit with variable air purification capacity, comprising an air duct, the air duct comprising an air inlet section, a first filter section, an oxygen supply section, a fan section, a second filter section, and an air supply section connected in sequence;

[0006] The air inlet section is provided with a fresh air vent, which is used to connect with the outdoor environment;

[0007] The first filter section and the second filter section are both used to filter air; the second filter section is provided with a first air valve and a second air valve at both ends, the first air valve is connected to the fan section, and the second air valve is connected to the air supply section;

[0008] A bypass section is connected in parallel at both ends of the second filter section. The operating resistance of the bypass section is lower than that of the second filter section. A third air valve and a fourth air valve are respectively provided at both ends of the bypass section. The third air valve is connected to the fan section, and the fourth air valve is connected to the air supply section.

[0009] The oxygen supply section is connected to the oxygen output port of the oxygen concentrator, and the nitrogen output port of the oxygen concentrator is used to connect to the outdoor environment;

[0010] A blower is provided in the fan section;

[0011] The air supply section is provided with an air supply outlet, which is used to communicate with the indoor environment.

[0012] The air conditioning unit with variable air purification capacity of this solution is equipped with an air intake section, a first filter section and an air supply section in series in the air duct, and a second filter section and a bypass section are connected in parallel between the first filter section and the air supply section. Corresponding air valves are provided at both ends of the second filter section and the bypass section. By opening and closing the corresponding air valves, the air can have different flow paths, thereby obtaining different filtering effects and operating resistances to adapt to different working conditions, for example:

[0013] 1. When the first and second air valves are open and the third and fourth air valves are closed, the air entering from the air inlet section will flow through the first and second filter sections in sequence, and then be sent into the room through the air supply port of the air supply section. In this working state, both the first and second filter sections participate in filtering the air, achieving the best filtering effect. This is suitable for occasions where outdoor air pollution is severe.

[0014] 2. When the first and second air valves are closed and the third and fourth air valves are opened, the air entering from the air inlet section will flow through the first filter section and the bypass section in sequence, and then be sent into the room through the air supply port of the air supply section. In this working state, the air will not flow through the second filter section, and has a smaller operating resistance. It is suitable for occasions where the outdoor air pollution level is low and energy saving and emission reduction are required.

[0015] At the same time, this solution also integrates an oxygen supply section connected to the oxygen generator in the air duct, which can provide fresh oxygen to the room and avoid the situation where the indoor oxygen concentration cannot meet the usage requirements.

[0016] As mentioned above, this solution is achieved by providing a second filter section and a bypass section with an air valve in parallel after the first filter section, and integrating an oxygen supply section in the air duct. On the one hand, the air flow path can be changed by switching the corresponding air valve, thereby adjusting the filtering effect and power consumption of this solution to adapt to different usage environments. It can not only improve the filtering effect to ensure the quality of indoor air when the air pollution level is serious, but also reduce power consumption when the air pollution level is low; on the other hand, it can also provide oxygen to the room through the oxygen concentrator to avoid the situation where the indoor oxygen concentration cannot meet the usage requirements.

[0017] Preferably, the filtration grade of the second filtration section is higher than that of the first filtration section.

[0018] Since the first filter segment is on the necessary path for air, and the second filter segment is on one of the optional paths, this solution recommends that the filtration level of the first filter segment be lower than that of the second filter segment, that is, the first filter segment is used to block pollutants with larger diameters and has smaller operating resistance, thereby enabling this solution to have lower minimum power consumption.

[0019] Preferably, the first filter section includes at least one of a coarse-efficiency filter and a medium-efficiency filter; the second filter section includes at least one of a sub-high-efficiency filter, a disinfection device, and a pathogen adsorption device.

[0020] This solution recommends specific filtering and disinfection equipment that should be included in the first filtration section and the second filtration section respectively.

[0021] Preferably, the air inlet section is further provided with a return air outlet, which is used to communicate with the indoor environment.

[0022] This solution allows indoor air to enter the air inlet section, mix with the air from outside, and then be sent back to the room after being processed through the first filter section, or the first filter section and the second filter section. This can effectively refresh the indoor air and avoid the problems of increased pollutant concentration, odor, and dry air caused by the lack of indoor air renewal for a long time.

[0023] Preferably, a fifth air valve is provided at the fresh air inlet, and a sixth air valve is provided at the return air inlet.

[0024] In traditional solutions to indoor oxygen concentration and temperature, the oxygen supply system and the heating / air-conditioning system are separated. The calculation of the oxygen flow required for oxygen supply is mostly based on the absence of outdoor fresh air. After working for a long time, problems such as increased indoor air pollutants and odors will occur. However, if fresh air ventilation is added, the efficiency of the oxygen supply system in increasing oxygen concentration will be reduced, resulting in the indoor oxygen concentration not meeting the required requirements.

[0025] Therefore, this solution sets air valves at both the fresh air inlet and the return air inlet, and can change the mixing ratio of fresh air and return air by adjusting the opening and closing of the air valves to adapt to different working requirements; for example, closing the fifth air valve and opening the sixth air valve makes this solution work in a state of full return air without fresh air, which is conducive to the oxygen concentrator to quickly increase the indoor oxygen concentration to the target value; and when the oxygen concentration reaches the target value, reopening the fifth air valve can introduce fresh air into the indoor environment, realize ventilation of the indoor environment, and avoid odor.

[0026] Preferably, the openings of the first air valve, the second air valve, the third air valve and the fourth air valve are adjustable.

[0027] This solution can not only realize the switching of the second filter section and the bypass section separately, but also adjust the air flow through the second filter section and the bypass section separately by changing the opening of each air valve, so as to more flexibly combine different air filtration effects and operating resistances to adapt to different working environments.

[0028] Preferably, a heating and humidifying section is further provided between the first filter section and the fan section. The heating and humidifying section comprises a heating device and a humidifying device. The heating device is used to adjust the temperature of the air, and the humidifying device is used to adjust the humidity of the air.

[0029] This solution increases the ability to regulate air temperature and humidity, and can better adapt to environments with severe temperature and humidity conditions.

[0030] Preferably, the humidifying device includes at least one of an electric heating humidifier, an electrode humidifier, a mist humidifier, and a wet film humidifier.

[0031] This proposal recommends four specific humidification device structures.

[0032] Preferably, the heating device includes a heat exchange coil, a throttle valve, an evaporator and a compressor connected in sequence to form a heat pump cycle; the heat exchange coil is used to exchange heat with the heating and humidifying section; the evaporator is used to exchange heat with the outdoor environment; and an evaporator fan is connected to the evaporator.

[0033] This proposal recommends a specific form of heating device that can transfer outdoor heat to indoors through a heat pump cycle.

[0034] Preferably, the air supply fan includes at least one of an EC fan and a variable frequency fan.

[0035] This proposal recommends two specific blower structures.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The utility model provides an air-conditioning unit with a variable air purification capacity. By arranging a second filter section and a bypass section with an air valve in parallel after a first filter section and integrating an oxygen supply section in an air duct, on the one hand, the air flow path can be changed by switching the corresponding air valve, so that the filtering effect and power consumption of this solution can be adjusted to adapt to different usage environments. When the air pollution level is serious, the filtering effect can be improved to ensure the quality of indoor air, and when the air pollution level is low, the power consumption can be reduced. On the other hand, oxygen can be provided to the room through an oxygen concentrator to avoid the situation where the indoor oxygen concentration cannot meet the usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1This is a schematic diagram of the planar layout structure of an air conditioning unit with variable air purification capacity according to the present invention;

[0039] Figure 2 This is a schematic diagram of the partial planar layout structure of an air conditioning unit with variable air purification capacity according to the present invention;

[0040] Figure 3 This is a schematic diagram of the partial planar layout structure of an air conditioning unit with variable air purification capacity according to the present invention;

[0041] Figure 4 This is a schematic diagram of the partial planar layout structure of an air conditioning unit with variable air purification capacity of the utility model;

[0042] Icons: 1-air inlet section; 2-first filter section; 3-heating and humidification section; 4-oxygen supply section; 5-fan section; 6-second filter section; 7-bypass section; 8-air supply section; 9-oxygen production section; 10-ventilation grid; 11-oxygen generator; 12-fan; 13-evaporator fan;

[0043] 21-coarse-effect filter; 22-medium-effect filter; 31-heating section; 311-throttle valve; 312-evaporator; 313-compressor; 314-four-way reversing valve; 32-humidification section; 61-sub-high-efficiency filter; 62-bacteria adsorption device; 63-disinfection device;

[0044] 201-Fresh air inlet; 202-Return air inlet; 203-Supply air inlet;

[0045] 301-first air valve; 302-second air valve; 303-third air valve; 304-fourth air valve; 305-fifth air valve; 306-sixth air valve. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be understood as limiting the scope of the present invention to the following embodiments, and all technologies implemented based on the present invention fall within the scope of the present invention.

[0047] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating orientation or positional relationships such as "upper," "lower," "left," "right," "center," "inside," and "outside" are based on the orientation or positional relationships shown in the accompanying drawings, or are the orientation or positional relationships in which the inventive product / device / apparatus is typically placed when in use. These terms indicating orientation or positional relationships are merely for the purpose of facilitating the description of the present invention or simplifying the description of the specific embodiments to facilitate a quick understanding of the solutions by technicians. They do not indicate or imply that a particular device / component / element must have a specific orientation or be constructed and operated in a specific positional relationship, and therefore should not be construed as limiting the present invention.

[0048] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present invention.

[0049] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0050] In addition, in the description of the embodiments of the present invention, "several," "plurality," and "a number" represent at least two. It can also be any number such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0051] Furthermore, in the description of the technical solution of the present invention, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welded, riveted, bolted, threaded, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communicative; they may be direct, indirect via an intermediate medium, or internally connected between two components.

[0052] Example 1

[0053] like Figures 1 to 4 As shown, an air conditioning unit with variable air purification capacity includes an air duct, which includes an air inlet section 1, a first filter section 2, a heating and humidification section 3, an oxygen supply section 4, a fan section 5, a second filter section 6 and an air supply section 8 connected in sequence;

[0054] The air inlet 201 and the return air inlet 202 are provided on the air inlet section 1. The fresh air inlet 201 is used to communicate with the outdoor environment, and the return air inlet 202 is used to communicate with the indoor environment. The fresh air inlet 201 and the return air inlet 202 are respectively provided with a fifth air valve 305 and a sixth air valve 306;

[0055] The first filter section 2 and the second filter section 6 are both used to filter air; a first air valve 301 and a second air valve 302 are respectively provided at both ends of the second filter section 6, and the first air valve 301 and the second air valve 302 are opened and closed in conjunction with each other, thereby closing or opening the second filter section 6; the first air valve 301 is connected to the fan section 5, and the second air valve 302 is connected to the air supply section 8;

[0056] A bypass section 7 is connected in parallel at both ends of the second filter section 6. The operating resistance of the bypass section 7 is lower than that of the second filter section 6. A third air valve 303 and a fourth air valve 304 are respectively provided at both ends of the bypass section 7. The third air valve 303 and the fourth air valve 304 are opened and closed in conjunction with each other to close or open the bypass section 7. The third air valve 303 is connected to the fan section 5, and the fourth air valve 304 is connected to the air supply section 8.

[0057] The heating and humidifying section 3 includes a heating section 31 and a humidifying section 32, wherein the heating section 31 is arranged close to the air inlet section 1 and is provided with a heating device for adjusting the air temperature; the humidifying section 32 is arranged close to the oxygen supply section 4 and is provided with a humidifying device for adjusting the air humidity;

[0058] The oxygen supply section 4 is connected to the oxygen output port of the oxygen concentrator 11 and can receive the oxygen produced by the oxygen concentrator 11; the oxygen concentrator is arranged inside the oxygen concentrator section 9, and the nitrogen output port of the oxygen concentrator is used to communicate with the outdoor environment. The sides and bottom of the oxygen concentrator section 9 are also provided with ventilation grilles to meet the air intake, nitrogen discharge and heat dissipation requirements of the oxygen concentrator 11, so that the oxygen concentrator 11 can maintain normal operation; the setting location of the oxygen concentrator section 9 includes but is not limited to the side or bottom of the fan section 5, as long as it can be used to fix the oxygen concentrator 11;

[0059] A blower 12 is provided in the fan section 5; an air outlet 203 is provided on the air supply section 8, and the air outlet 203 is used to communicate with the indoor environment; turning on the blower 12 can drive the gas in the air duct to move toward the air supply section 8 and enter the indoor environment from the air outlet 203.

[0060] exist Figures 1 to 4middle, Figure 1 This is a schematic diagram of the overall planar layout structure of the air conditioning unit with variable air purification capacity in this embodiment. Figure 2 and Figure 3 This is a schematic diagram of the planar layout structure with some heating devices hidden. Figure 4 yes Figure 2 and Figure 3 Schematic diagram of the separate planar layout structure of the heating device not shown in the figure.

[0061] In the above embodiment, the operating resistance of the bypass section 7 is lower than that of the second filter section 6 , which can be achieved by, for example, not providing a filter inside the bypass section 7 , adjusting the cross-sectional shape and area of ​​the bypass section 7 , etc.

[0062] In the above embodiment, the number of oxygen generators 11 can be one or more, and its specific parameters are determined according to the required oxygen flow rate in the room; the oxygen generator 11 can inhale air through the ventilation grille, and produce oxygen to be transported to the oxygen supply section 4, while the by-product nitrogen is discharged to the outdoor environment through the ventilation grille.

[0063] In an optional embodiment, the filtration grade of the second filter segment 6 is higher than that of the first filter segment 2 , that is, the maximum pore size of particles that can pass through the second filter segment 6 is smaller than the maximum pore size of particles that can pass through the first filter segment 2 .

[0064] In an optional embodiment, the first filter section 2 includes at least one of a coarse filter 21 and a medium filter 22; the second filter section 6 includes at least one of a sub-high efficiency filter 61, a disinfection device 63, and a bacteria adsorption device 62. Figures 1 to 2 As shown, the first filter section 2 includes a coarse filter 21 and a medium filter 22, and the coarse filter 21 is close to the air inlet section 1, and the medium filter 22 is close to the heating section 31; the second filter section 6 is provided with a disinfection device 63, a sub-high efficiency filter 61 and a pathogen adsorption device 62 in sequence along the air supply direction of the air duct.

[0065] In an optional embodiment, the disinfection device 63 includes at least one of an ultraviolet disinfector, a plasma air disinfector, and a micro-electrostatic disinfector.

[0066] In an optional embodiment, the bacteria adsorption device 62 includes at least one of an activated carbon adsorption layer, an electrostatic adsorption layer, and a silver-plated filter.

[0067] In an optional embodiment, the openings of the first air valve 301, the second air valve 302, the third air valve 303, the fourth air valve 304, the fifth air valve 305 and the sixth air valve 306 are adjustable, so that not only can the working mode be changed by switching the corresponding air valves, but the specific working parameters under each working mode can also be more flexibly adjusted by adjusting the openings of the air valves, such as the mixing ratio of fresh air and return air, and the ratio of air through the bypass section 7 and the second filter section 6, so as to better meet the performance requirements of the corresponding usage environment.

[0068] In the above embodiment, at least one of the first air valve 301, the second air valve 302, the third air valve 303, the fourth air valve 304, the fifth air valve 305 and the sixth air valve 306 is an electrically adjustable air valve, which can automatically adjust the opening size to change the working mode.

[0069] In an optional embodiment, the humidifying device includes at least one of an electric humidifier, an electrode humidifier, a mist humidifier, and a wet film humidifier, and if used in severe cold and cold areas, the humidifying device must consider anti-freezing measures.

[0070] In an optional embodiment, the heating device includes a heat exchange coil for exchanging heat with the heating section 31, and the heat exchange coil is provided with a working fluid inlet, a working fluid outlet and a condensate interface; the working fluid inlet and the working fluid outlet are connected to the throttle valve 311, the evaporator 312, the compressor 313 and the four-way reversing valve 314 in sequence to form a heat pump cycle; the evaporator 312 is used to exchange heat with the outdoor environment; the evaporator 312 is connected to the evaporator fan 13; Figure 4 As shown, the four-way reversing valve 314 has four connection ends a, b, c, and d. When there is a demand for heating, the a end of the four-way reversing valve 314 is connected to the b end, and the c end is connected to the d end. The low-temperature and low-pressure working medium is compressed into a high-temperature and high-pressure working medium by the compressor 313, and enters the heat exchange coil of the heating section 31 through the ab channel of the four-way reversing valve 314 to release heat to the air. The condensed working medium liquid then enters the throttle valve 311 for throttling and pressure reduction, and then enters the evaporator 312 to exchange heat with the air and evaporate. Finally, it is sucked into the compressor 313 again through the cd channel of the four-way reversing valve 314 to continue the next cycle. When the thermal mode reaches the defrost condition, the a end of the four-way reversing valve 314 is connected to the c end, and the b end is connected to the d end, the evaporator fan 13 is turned off, and the blower 12 of the fan section 5 operates at a low frequency. The low-temperature and low-pressure working medium is compressed into a high-temperature and high-pressure state by the compressor 313, and enters the evaporator 312 through the ac channel of the four-way reversing valve 314 to provide heat for defrosting. The cooled working medium enters the throttle valve 311 for throttling and pressure reduction, and then enters the heat exchange coil of the heating section 31 to absorb heat in the air. The evaporated working medium enters the compressor 313 through the bd channel of the four-way reversing valve 314, completing a defrost cycle.

[0071] In an optional embodiment, the air blower 12 includes at least one of an EC fan and a variable frequency fan.

[0072] The heat recovery indoor environment heat, oxygen and humidity control unit in this embodiment has the following different working modes to meet different usage requirements:

[0073] Working mode 1: Oxygen supply + new return air heating + humidification mode. In this mode, the fifth air valve 305 and the sixth air valve 306 are partially opened, the third air valve 303 and the fourth air valve 304 are fully opened, the first air valve 301 and the second air valve 302 are closed, the disinfection device 63 is turned off, and the compressor 313 and the humidification device are turned on.

[0074] Working mode 2: oxygen supply + full return air heating + humidification mode. In this mode, the fifth air valve 305 is closed, the sixth air valve 306 is fully open, the third air valve 303 and the fourth air valve 304 are fully open, the first air valve 301 and the second air valve 302 are closed, the disinfection device 63 is turned off, and the compressor 313 and the humidification device are turned on.

[0075] Working mode three: oxygen supply + fresh air ventilation mode. In this mode, the fifth air valve 305 is fully open, the sixth air valve 306 is closed, the third air valve 303 and the fourth air valve 304 are fully open, the first air valve 301 and the second air valve 302 are closed, the disinfection device 63 is turned off, and the compressor 313 and the humidification device are turned off.

[0076] Working mode 4: oxygen supply + new return air ventilation mode. In this mode, the fifth air valve 305 and the sixth air valve 306 are partially opened, the third air valve 303 and the fourth air valve 304 are fully opened, the first air valve 301 and the second air valve 302 are closed, the disinfection device 63 is turned off, and the compressor 313 and the humidification device are turned off.

[0077] Working mode five: oxygen supply + full return air ventilation mode. In this mode, the fifth air valve 305 is closed, the sixth air valve 306 is fully open, the third air valve 303 and the fourth air valve 304 are fully open, the first air valve 301 and the second air valve 302 are closed, the disinfection device 63 is turned off, and the compressor 313 and the humidification device are turned off.

[0078] Working mode six: oxygen supply + new return air heating + moderate haze + humidification mode. In this mode, the fifth air valve 305 and the sixth air valve 306 are partially opened, the third air valve 303 and the fourth air valve 304 are partially opened, the first air valve 301 and the second air valve 302 are partially opened, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned on.

[0079] Working mode seven: oxygen supply + full return air heating + moderate haze + humidification mode. In this mode, the fifth air valve 305 is closed, the sixth air valve 306 is fully open, the third air valve 303 and the fourth air valve 304 are partially opened, the first air valve 301 and the second air valve 302 are partially opened, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned on.

[0080] Working mode eight: oxygen supply + fresh air ventilation + moderate haze mode. In this mode, the fifth air valve 305 is fully open, the sixth air valve 306 is closed, the third air valve 303 and the fourth air valve 304 are partially open, the first air valve 301 and the second air valve 302 are partially open, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned off.

[0081] Working mode nine: oxygen supply + new return air ventilation + moderate haze mode. In this mode, the fifth air valve 305 and the sixth air valve 306 are partially opened, the third air valve 303 and the fourth air valve 304 are partially opened, the first air valve 301 and the second air valve 302 are partially opened, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned off.

[0082] Working mode ten: oxygen supply + full return air ventilation + moderate haze mode. In this mode, the fifth air valve 305 is closed, the sixth air valve 306 is fully open, the third air valve 303 and the fourth air valve 304 are partially opened, the first air valve 301 and the second air valve 302 are partially opened, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned off.

[0083] Working mode 11: oxygen supply + new return air heating + severe haze / epidemic + humidification mode. In this mode, the fifth air valve 305 and the sixth air valve 306 are partially opened, the third air valve 303 and the fourth air valve 304 are closed, the first air valve 301 and the second air valve 302 are fully opened, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned on.

[0084] Working mode 12: oxygen supply + full return air heating + severe haze / epidemic + humidification mode. In this mode, the fifth air valve 305 is closed, the sixth air valve 306 is fully open, the third air valve 303 and the fourth air valve 304 are closed, the first air valve 301 and the second air valve 302 are fully open, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned on.

[0085] Working mode thirteen: oxygen supply + fresh air ventilation + severe haze / epidemic mode. In this mode, the fifth air valve 305 is fully open, the sixth air valve 306 is closed, the third air valve 303 and the fourth air valve 304 are closed, the first air valve 301 and the second air valve 302 are fully open, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned off.

[0086] Working mode 14: oxygen supply + new return air ventilation + severe haze / epidemic mode. In this mode, the fifth air valve 305 and the sixth air valve 306 are partially opened, the third air valve 303 and the fourth air valve 304 are closed, the first air valve 301 and the second air valve 302 are fully opened, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned off.

[0087] Working mode 15: oxygen supply + full return air ventilation + severe haze / epidemic mode. In this mode, the fifth air valve 305 is closed, the sixth air valve 306 is fully open, the third air valve 303 and the fourth air valve 304 are closed, the first air valve 301 and the second air valve 302 are fully open, the disinfection device 63 is turned on, and the compressor 313 and the humidification device are turned off.

[0088] Among the above working modes, from the perspective of air pollution, working modes 1 to 5 are normal working conditions, working modes 6 to 10 are moderate haze working conditions, and working modes 11 to 15 are severe haze / epidemic working conditions; from the perspective of heating, working modes 1, 2, 6, 7, 11 and 12 are used during the winter heating season, and working modes 3, 4, 5, 8, 9, 10, 13, 14 and 15 are used during the non-heating season. The working principles of the units under different working conditions are as follows:

[0089] Normal heating conditions: During winter heating, in order to quickly increase the oxygen concentration to the target value, the fresh air is not turned on, and working mode two is used for heating, humidification and oxygen supply. After the indoor oxygen concentration reaches the standard, the fresh air return air ratio is adjusted for operation. For example, when using working mode one, the fresh air and return air are mixed in the air inlet section 1, and then pass through the coarse filter 21, the medium efficiency filter 22, the heating section 31, the humidification section 32, and the oxygen supply section 4 for filtration, heating, humidification and oxygenation in turn, and are then transported from the air outlet 203 to the served room by the blower 1 of the fan section 5 through the bypass section 7 and the air supply section 8.

[0090] Normal non-heating operating conditions: During the non-heating season, first operate in working mode 5. After the oxygen concentration rises to the target value, adjust the proportion of new return air and adopt working mode 3 or working mode 4. The new return air or fresh air is filtered by the coarse-effect filter 21 and the medium-efficiency filter 22, and then mixed with the oxygen from the oxygen supply section 4. It is then delivered to the service room from the air supply port 203 by the blower 1 of the fan section 5 through the bypass section 7 and the air supply section 8.

[0091] Heating moderate haze condition: During winter heating, the fresh air is not turned on in the initial stage, and working mode seven is used for heating, humidification and oxygen supply. After the indoor oxygen concentration reaches the standard, the fresh air return air ratio is adjusted for operation. For example, using working mode six, the fresh air and return air are mixed in the air inlet section 1, and then pass through the coarse-effect filter 21, the medium-efficiency filter 22, the heating section 31, the humidification section 32, and the oxygen supply section 4 for filtration, heating, humidification and oxygenation, and then are transported by the blower 1 of the fan section 5. One part is transported to the air supply section 8 through the bypass section 7, and the other part passes through the second filter section 6 and is sterilized by the disinfection device 63, filtered by the sub-high-efficiency filter 61 and adsorbed by the pathogen adsorption device 62 before being transported to the air supply section 8. The two parts of air are mixed and transported to the service room from the air supply port 203.

[0092] Non-heating moderate haze working condition: During the non-heating season, first operate in working mode 10. After the oxygen concentration rises to the target value, adjust the proportion of new return air and adopt working mode 8 or working mode 9. The new return air or fresh air is filtered by the coarse-effect filter 21 and the medium-efficiency filter 22, and then mixed with the oxygen in the oxygen supply section 4. It is then transported by the blower 1 of the fan section 5. One part is transported to the air supply section 8 through the bypass section 7, and the other part passes through the second filter section 6 and is sterilized by the disinfection device 63, filtered by the sub-high-efficiency filter 61 and adsorbed by the pathogen adsorption device 62 before being transported to the air supply section 8. The two parts of air are mixed and transported to the serviced room from the air supply port 203.

[0093] Heating severe haze / epidemic conditions: During winter heating, the fresh air is not turned on in the initial stage, and the heating, humidification and oxygen supply are provided in working mode 12. After the indoor oxygen concentration reaches the standard, the fresh air return air ratio is adjusted to operate. For example, using working mode 11, the fresh air and return air are mixed in the air inlet section 1, and then pass through the coarse filter 21, the medium efficiency filter 22, the heating section 31, the humidification section 32, and the oxygen supply section 4 in sequence for filtration, heating, humidification and oxygenation, and then pass through the second filter section 6, and undergo disinfection by the disinfection device 63, filtration by the sub-high efficiency filter 61 and adsorption by the pathogen adsorption device 62, and then are transported to the air supply section 8, and then transported to the service room from the air supply port 203.

[0094] Non-heating severe haze / epidemic conditions: During the non-heating season, first operate in working mode 15. After the oxygen concentration rises to the target value, adjust the new return air ratio and adopt working mode 13 or working mode 14. The new return air or fresh air is filtered by the coarse-effect filter 21 and the medium-efficiency filter 22, and then mixed with the oxygen in the oxygen supply section 4. It is transported to the second filter section 6 by the blower 1 of the fan section 5, passes through the second filter section 6, and undergoes disinfection by the disinfection device 63, filtration by the sub-high-efficiency filter 61 and adsorption by the pathogen adsorption device 62, and then is transported to the air supply section 8, and then transported to the service room from the air supply port 203.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An air conditioning unit with variable air purification capacity, comprising an air duct, characterized in that: The air duct comprises an air inlet section (1), a first filter section (2), an oxygen supply section (4), a fan section (5), a second filter section (6) and an air supply section (8) which are connected in sequence; The air inlet section (1) is provided with a fresh air inlet (201), and the fresh air inlet (201) is used to communicate with the outdoor environment; The first filter section (2) and the second filter section (6) are both used for filtering air; a first air valve (301) and a second air valve (302) are respectively provided at both ends of the second filter section (6); the first air valve (301) is connected to the fan section (5), and the second air valve (302) is connected to the air supply section (8); A bypass section (7) is connected in parallel to both ends of the second filter section (6). The operating resistance of the bypass section (7) is lower than that of the second filter section (6). A third air valve (303) and a fourth air valve (304) are respectively provided at both ends of the bypass section (7). The third air valve (303) is connected to the fan section (5), and the fourth air valve (304) is connected to the air supply section (8). The oxygen supply section (4) is connected to the oxygen output port of the oxygen concentrator (11), and the nitrogen output port of the oxygen concentrator (11) is used to communicate with the outdoor environment; The fan section (5) is provided with a blower (12); The air supply section (8) is provided with an air supply port (203), and the air supply port (203) is used to communicate with the indoor environment.

2. The air conditioning unit with variable air purification capacity according to claim 1, characterized in that: The second filter section (6) has a higher filtration level than the first filter section (2).

3. The air conditioning unit with variable air purification capacity according to claim 2, characterized in that: The first filter section (2) includes at least one of a coarse-effect filter (21) and a medium-effect filter (22); the second filter section (6) includes at least one of a sub-high-efficiency filter (61), a disinfection device (63), and a pathogen adsorption device (62).

4. The air conditioning unit with variable air purification capacity according to claim 1, characterized in that: The air inlet section (1) is also provided with an air return port (202), and the air return port (202) is used to communicate with the indoor environment.

5. The air conditioning unit with variable air purification capacity according to claim 4, characterized in that: A fifth air valve (305) is provided at the fresh air inlet (201), and a sixth air valve (306) is provided at the return air inlet (202).

6. An air conditioning unit with variable air purification capacity according to any one of claims 1 to 5, characterized in that: The openings of the first air valve (301), the second air valve (302), the third air valve (303) and the fourth air valve (304) are adjustable.

7. An air conditioning unit with variable air purification capacity according to any one of claims 1 to 5, characterized in that: A heating and humidifying section (3) is further provided between the first filtering section (2) and the fan section (5), and the heating and humidifying section (3) comprises a heating device and a humidifying device, wherein the heating device is used to adjust the temperature of the air, and the humidifying device is used to adjust the humidity of the air.

8. The air conditioning unit with variable air purification capacity according to claim 7, characterized in that: The humidifying device includes at least one of an electric heating humidifier, an electrode humidifier, a mist humidifier, and a wet film humidifier.

9. The air conditioning unit with variable air purification capacity according to claim 7, characterized in that: The heating device comprises a heat exchange coil, a throttle valve (311), an evaporator (312) and a compressor (313) which are sequentially connected to form a heat pump cycle; the heat exchange coil is used to exchange heat with the heating and humidifying section (3); the evaporator (312) is used to exchange heat with the outdoor environment; and the evaporator (312) is connected to an evaporator fan (13).

10. An air conditioning unit with variable air purification capacity according to any one of claims 1 to 5, characterized in that: The air blower (12) includes at least one of an EC blower and a variable frequency blower.

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