An electric heating air filter element and a low-energy consumption air high-temperature disinfection and sterilization device

Abstract

The present invention provides an electric heating air filter element and a low-energy consumption air high-temperature disinfection and sterilization device. The electric heating air filter element includes a high-temperature resistant primary filter cotton, a metal aluminum mesh, an insulating electric heating wire, and a high-temperature resistant high-efficiency air filter element; the metal aluminum mesh is installed at the air inlet of the high-temperature resistant high-efficiency air filter element and is attached to the aluminum foil partition of the filter element; the insulating electric heating wire is fixed on the metal aluminum mesh, and the primary high-temperature resistant filter cotton covers the surface of the metal aluminum mesh; both ends of the insulating electric heating wire are connected to the working power supply. The insulating electric heating wire in the electric heating air filter element of the present invention can simultaneously heat the primary filter cotton and the high-temperature resistant high-efficiency air filter element during the power-on stage, and perform high-temperature disinfection on the bacteria and viruses attached to both; the sterilization device of the present invention realizes the air disinfection, sterilization and purification effect with low energy consumption and high efficiency through the filtration and sterilization control in different time periods.

Description

Technical Field

[0001] The invention relates to the field of air purification, in particular to an electrically heated air filter element and a low-energy consumption high-temperature air disinfection and sterilization device using the filter element. Background Art

[0002] Traditional air purification equipment mostly uses filtering technologies such as activated carbon filters and HEPA (high-efficiency particulate air filters). Although they have good filtering capabilities for smoke, bacteria and dust, the air purification equipment does not have the function of actively disinfecting viruses adsorbed on the filter element, or although it has an active disinfecting function, it cannot be completely disinfected due to the dead corners of the pleated filter element. As a result, when the filter is replaced, the bacteria and viruses attached to the filter will spread again and cause secondary pollution, endangering people's health.

[0003] In terms of air disinfection, currently commonly used disinfection methods include ultraviolet disinfection and ozone disinfection. Both ultraviolet and ozone disinfection require a long air retention time to be thoroughly disinfected. In addition, ultraviolet and ozone are harmful to the human body and should not be used in open environments with people such as hospital clinics, wards, and operating rooms. Air disinfection and sterilization can also be achieved using disinfectants such as chlorine-containing preparations and peracetic acid, but they need to be achieved through manual spraying, and the duration is short, and the disinfection effect is limited.

[0004] High temperature is also an effective method of sterilization and disinfection. Its principle is mainly based on two aspects: 1) High temperature can cause irreversible denaturation of proteins that constitute living organisms, inactivate enzymes, and cause irreversible damage to the cell structure of living organisms; 2) Genetic material DNA will also decompose at high temperatures, causing the death of bacteria and viruses. At present, there are two main working modes of high-temperature air disinfection devices. One is to heat the air flow, such as the solution disclosed in publication number CN 2627394A. However, since it utilizes a large amount of environmental ventilation and the air flow retention time is very short, the power consumption required to instantly heat the air flow temperature to the virus disinfection temperature is relatively large. In addition, this type of method also needs to consider the cooling problem of the exhaust air at the same time, such as the solution disclosed in publication number CN107525170A, which solves the cooling problem but increases the complexity of the device; the other is to heat the filter element while the fan is ventilating, such as the solution disclosed in publication number CN 109556207A, which uses air to take away part of the heat of the filter element through convective heat transfer, but this method greatly increases the power required to maintain the filter element at the virus disinfection temperature, which lacks practicality. Summary of the invention

[0005] The object of the present invention is to provide an electrically heated air filter element and a low-energy air high-temperature disinfection and sterilization device using such a filter element, so as to achieve the functions of low-energy and high-efficiency air disinfection, sterilization and purification, while comprehensively killing bacteria and viruses attached to the filter element, and avoiding secondary pollution caused when replacing the filter element.

[0006] Specifically, the present invention provides an electrically heated air filter element, which includes a high-temperature resistant primary filter cotton, a metal aluminum mesh, an insulating electric heating wire, and a high-temperature resistant high-efficiency air filter element installed in sequence. The high-temperature resistant high-efficiency air filter element is assembled by using high-temperature resistant filter paper, aluminum foil partition board, stainless steel outer frame, and special high-temperature resistant sealant; the two sides of the high-temperature resistant filter paper are folded 180° to form a wedge-shaped pleated layer; the corrugated aluminum foil partition board is inserted between adjacent high-temperature resistant filter papers, the bottom end of the aluminum foil partition board is attached to the bottom of the high-temperature resistant filter paper pleated layer, and the side of the aluminum foil partition board is attached to the adjacent high-temperature resistant filter papers on both sides; the metal aluminum mesh is installed on one side of the air inlet of the high-temperature resistant high-efficiency air filter element and is attached to the aluminum foil partition board of the high-temperature resistant high-efficiency air filter element; the insulating electric heating wire is fixed on the metal aluminum mesh, and the high-temperature resistant primary filter cotton covers the surface of the metal aluminum mesh; both ends of the insulating electric heating wire are connected to the working power supply, and after being energized, the high-temperature resistant high-efficiency air filter element and the high-temperature resistant primary filter cotton are heated simultaneously to perform high-temperature disinfection on the bacteria and viruses attached thereto.

[0007] In an embodiment of the present invention, the filter material of the high-temperature resistant filter paper is glass fiber, and the filter material of the high-temperature resistant primary filter cotton is glass fiber.

[0008] In an embodiment of the present invention, the insulating electric heating wire is specifically a silicone electric heating wire or a polytetrafluoroethylene electric heating wire.

[0009] In an embodiment of the present invention, the fixing method of the insulating electric heating wire to the metal aluminum mesh is: the insulating electric heating wire is wound around the metal aluminum mesh by means of the mesh holes of the metal aluminum mesh, or the insulating electric heating wire is pasted on the surface of the metal aluminum mesh by using a high-temperature resistant sealant.

[0010] In an embodiment of the present invention, the metal aluminum meshes are respectively installed at the air inlet and outlet of the high-temperature resistant high-efficiency air filter element.

[0011] In an embodiment of the present invention, a low-energy air high-temperature disinfection and sterilization device using the aforementioned electrically heated air filter element is provided, which includes a hollow housing, an air inlet and an air outlet provided at opposite ends of the housing, and the electrically heated air filter element and a fan installed in the housing and located between the air inlet and the air outlet. A control board is installed on the outer wall of the housing, and the control board is electrically connected to the fan and the insulating electric heating wire in the electrically heated air filter element through cables respectively to control the fan and the insulating electric heating wire to work in different time periods.

[0012] In one embodiment of the present invention, the working process of the control board in different time periods is as follows:

[0013] The control board first controls the fan located in the housing to work. The high-temperature resistant primary filter cotton and the high-efficiency air filter in the electrically heated air filter intercept bacteria and viruses in the air flow entering the housing from the air inlet. The purified air is discharged from the air outlet. During this process, the insulating electric heating wire is not powered for heating.

[0014] When entering the disinfection period, the control board controls the fan to stop working, powers on the insulating electric heating wire, and uses high temperature to heat both the high-temperature resistant primary filter cotton and the high-temperature resistant high-efficiency air filter simultaneously, performing high-temperature disinfection on the bacteria and viruses attached to the electrically heated air filter.

[0015] After the disinfection is completed, the control board stops powering on the insulating electric heating wire, starts the fan to continue working, and repeats the above process until the predetermined goal is achieved.

[0016] In one embodiment of the present invention, a temperature measuring thermocouple is installed inside the high-temperature resistant high-efficiency air filter for temperature monitoring and feedback to the control board to achieve temperature control heating of the high-temperature resistant high-efficiency air filter.

[0017] In one embodiment of the present invention, the heating temperature of the insulating electric heating wire is 120 - 150 °C.

[0018] The electrically heated air filter provided by the present invention and the low-energy consumption air high-temperature disinfection and sterilization device using this filter have the following advantages: By controlling the insulating electric heating wire and the fan to work in different time periods, when the fan works, the primary filter cotton of the electrically heated filter and the high-temperature resistant high-efficiency air filter effectively intercept bacteria and viruses in the air. When the fan stops working, the insulating electric heating wire heats the primary filter cotton and the high-temperature resistant high-efficiency air filter simultaneously, performing high-temperature disinfection on the bacteria and viruses attached to the air filter. Adopting this working method in different time periods can greatly reduce power consumption and improve the economic practical value of this air high-temperature disinfection and sterilization device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an electrically heated air filter according to an embodiment of the present invention;

[0020] Figure 2 is a schematic structural diagram of a low-energy consumption air high-temperature disinfection and sterilization device according to an embodiment of the present invention;

[0021] Figure 3 is a schematic structural diagram of a high-temperature resistant air filter according to an embodiment of the present invention;

[0022] Figure 4It is a schematic structural diagram of a metal aluminum mesh wound with an insulating electric heating wire according to an embodiment of the present invention. Specific Embodiment

[0023] In the following, the specific embodiments of the present invention will be further described in detail with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0024] As Figure 1 shown, in an embodiment of the present invention, an electric heating air filter element is disclosed, which includes: a high-temperature resistant primary filter cotton 1, a metal aluminum mesh 2, an insulating electric heating wire 3, and a high-temperature resistant high-efficiency air filter element 4. Among them, the high-temperature resistant high-efficiency air filter element 4 is assembled by a high-temperature resistant filter paper 5 made of glass fiber or ultra-fine glass fiber, an aluminum foil separator 6, a stainless steel outer frame, and a special high-temperature resistant sealant. The two sides of the high-temperature resistant filter paper 5 are folded 180° to form a wedge-shaped pleated layer. The aluminum foil separator 6 is a corrugated paper formed by aluminum foil, which is inserted between the high-temperature resistant filter papers 5 of adjacent wedge-shaped pleated layers. The bottom end of the aluminum foil separator 6 is attached to the bottom of the pleated layer of the high-temperature resistant filter paper 5, and the side surface of the aluminum foil separator 6 is completely attached to the high-temperature resistant filter papers 5 on both adjacent sides, thereby playing a supporting role to prevent the high-temperature resistant filter paper 5 from being damaged.

[0025] The filtration efficiency of the high-temperature resistant high-efficiency air filter element 4 has specifications such as H10 - H14. Among them, the commonly used H13 specification for household purifiers has a filtration efficiency of 99.95% for particles above 0.3 microns, and can effectively filter microbial aerosol carriers (usually 1 - 5 μm) attached with bacteria and viruses, as well as PM2.5, pollen, etc. A metal aluminum mesh 2 is installed at the air inlet of the high-temperature resistant high-efficiency air filter element 4, and the metal aluminum mesh 2 can also be installed at the air outlet of the high-temperature resistant high-efficiency air filter element 4 at the same time. The lower surface of the metal aluminum mesh 2 is attached to the aluminum foil separator 6. The mesh holes of the metal aluminum mesh 2 can adopt rectangular mesh holes of 4mm × 8mm or 3mm × 6mm. The insulating electric heating wire 3 can adopt a silicone electric heating cable or a polytetrafluoroethylene electric heating cable. The insulating electric heating wire 3 is fixed on the metal aluminum mesh 2, and the fixing method can be to wind it around the metal aluminum mesh 2 by means of the mesh holes of the metal aluminum mesh 2, or to paste the insulating electric heating wire 3 on the surface of the metal aluminum mesh 2 with a high-temperature resistant sealant. In order to ensure uniform heating, the insulating electric heating wire 3 should be evenly distributed on the surface of the metal aluminum mesh 2. The material of the high-temperature resistant primary filter cotton 1 is also glass fiber. It is attached to the side of the metal aluminum mesh 2 fixed with the insulating electric heating wire away from the aluminum foil separator 6, that is, the side that first contacts the air. The size of the high-temperature resistant primary filter cotton 1 is the same as that of the metal aluminum mesh 2, and can perform primary filtration on particles above 5 μm in the air.

[0026] After the insulating electric heating wire 3 is energized, part of the heat is transferred to the surface of the high-temperature resistant and highly efficient air filter element 4 by means of heat radiation. Part of this heat directly reaches the surface of the high-temperature resistant filter paper 5 and is absorbed by the high-temperature resistant filter paper 5, while the other part reaches the surface of the aluminum foil partition 6 between the high-temperature resistant filter papers 5 of adjacent pleats. Since the reflectivity of the aluminum foil partition 6 to heat radiation is over 90%, it is an excellent heat-reflecting material. Therefore, the radiant heat reaching the surface of the aluminum foil partition 6 will be finally absorbed by the aluminum foil partition 6 and the high-temperature resistant filter paper 5 after multiple reflections in the cavity formed by the aluminum foil partition 6 and the adjacent high-temperature resistant filter paper 5. Another part of the heat generated by the insulating electric heating wire 3 heats the metal aluminum mesh 2 in contact with it by means of heat conduction. The metal aluminum mesh 2 made of pure aluminum has a thermal conductivity as high as 237Wm -1 K -1 , so it has a very high heat conduction efficiency. After the metal aluminum mesh 2 is rapidly heated up, it further heats the high-temperature resistant primary filter cotton 1 covering its surface. Since the heat conduction performance of the glass fiber material is very poor and its thermal conductivity is only 0.031Wm -1 K -1 , it is very difficult for the heat of the metal aluminum mesh 2 to exchange heat with the surrounding environment through the glass fiber. Therefore, the high-temperature resistant primary filter cotton 1 made of glass fiber plays a very good heat preservation and insulation role for the entire electric heating air filter element. Furthermore, it can realize the efficient heating of both the high-temperature resistant and highly efficient air filter element 4 and the high-temperature resistant primary filter cotton 1 at the same time, effectively kill the bacteria and viruses intercepted on the surfaces of the high-temperature resistant and highly efficient air filter element 4 and the high-temperature resistant primary filter cotton 1, achieve the self-purification function, and avoid causing secondary pollution.

[0027] As Figure 2 shown, in an embodiment of the present invention, a low-energy consumption high-temperature air disinfection and sterilization device using an electric heating air filter element is disclosed, which includes a housing 7, an air inlet 8, an electric heating air filter element 15, a fan 9, an air outlet 10, and a control board 11. Among them, the electric heating air filter element 15 is placed inside the housing 7, the air inlet 8 and the air outlet 10 are arranged on the surface of the housing 7, the control board 11 is installed on the housing 7, and is electrically connected to the fan 9 and the insulating electric heating wire 3 in the electric heating air filter element 15 in the housing 7 through cables 13 and 12. A temperature measuring thermocouple 14 is placed inside the high-temperature resistant and highly efficient air filter element 4 to monitor its temperature and feed it back to the control board 11 to realize temperature control heating of the high-temperature resistant and highly efficient air filter element 4 at 120 - 150°C.

[0028] In existing high-temperature air disinfection devices, whether heating the air or heating the filter element simultaneously during the air exchange process of the fan, the required power consumption is quite considerable. In this embodiment, however, the control board 11 is used to control the air exchange of the fan 9 and the insulated heating wire 3 to work in different time periods. For example, for every hour of air exchange by the fan 9, the insulated heating wire 3 is heated for 5 - 10 minutes, and this cycle continues. The power-on circuits of the fan 9 and the insulated heating wire 3 are respectively connected to the timing relay controller on the control board 11. By setting parameters for the timing relay controller, the power-on circuits of the fan 9 and the insulated heating wire 3 are controlled to be periodically turned on and off alternately, so as to realize the air exchange of the fan 9 and the electric heating of the filter element 15 to work in different time periods.

[0029] When the relay of the power-on circuit of the fan 9 is turned on, the relay of the power-on circuit of the insulated heating wire 3 is turned off. The high-temperature primary filter cotton 1 and the high-temperature high-efficiency air filter element 4 intercept bacteria and viruses in the air flow entering the housing 7 from the air inlet 8, and the purified air is discharged from the air outlet 10. When the relay of the power-on circuit of the fan 9 is turned off, the fan 9 stops working. At this time, the relay of the power-on circuit of the insulated heating wire 3 is turned on, and the high-temperature primary filter cotton 1 and the high-temperature high-efficiency air filter element 4 are heated simultaneously to perform high-temperature disinfection on the bacteria and viruses intercepted on the surfaces of the high-temperature high-efficiency air filter element 4 and the high-temperature primary filter cotton 1. In this way, the power consumed during the high-temperature disinfection of the virus is only the power of the electric heating of the air filter element 15 when it is energized. Due to the absence of the influence of air convection heat transfer, the energy consumption is greatly reduced.

[0030] To further illustrate, the above three heating modes are calculated and compared through simple examples.

[0031] For the first case, when the air flows through the high-temperature disinfection and sterilization device, the air flow temperature is instantaneously heated to the virus disinfection temperature. Assume that the air flow rate through the high-temperature disinfection and sterilization device is 0.054 kg / s, and the corresponding air exchange rate is 150 m 3 / h. If the traditional air heating method is used for disinfection and sterilization, and it is set to heat the normal-temperature air at 20 °C to 150 °C, that is, from the normal temperature ΔT = 130 °C. Since the residence time of the air flow in the device is very short and the air temperature needs to be instantaneously heated to the target temperature, according to the specific heat capacity of air c = 1×10 3 J / (kg×°C), the power required to instantaneously heat the air can be calculated (assuming a heating efficiency of 100%) as follows:

[0032]

[0033] For the second case, while the fan is exchanging air, the filter element is heated to 150 °C, and the air exchange rate is 150 m 3 / h, corresponding to the flow rate is 0.054 kg / s, and the ambient air temperature is 20°C. For an air change rate of 150 m 3 / h, a H13 high-efficiency air filter used in ordinary household purifiers is adopted (length 400 mm, width 220 mm, height 30 mm, the number of filter paper pleats is 140, and the assumed pleat spacing is 2.5 mm). Then the surface area after the filter paper is unfolded is

[0034] S = 0.22 m × 0.03 m × 140 × 2 = 1.848 m 2

[0035] Air passes through the filter paper through the fiber gaps on the filter paper. Let the average pore diameter d = 3 μm and the filter paper thickness t = 0.3 mm. The heat exchange between the air and the filter element through the pores is a convective heat transfer process in a tube flow. Assuming that the pores are approximately circular tubes, and since the air is laminar flow, for a fluid with constant properties, the Nusselt number Nu = 3.66. Looking up the table, the thermal conductivity of air k = 0.0243 W / (m / K), then there is a convective heat transfer coefficient

[0036]

[0037] It should be noted that due to the very small pore diameter, the heat transfer in the circular tubes inside the pores is a strong convective heat transfer process. According to

[0038] P = hA(T w -T a )

[0039] where the convective heat transfer area A is the sum of the inner areas of all the pores. Assuming the total number of pores on the filter paper is n

[0040]

[0041] That is, when a given heating power P is provided, the temperature difference (T w -T a ) between the filter element and the air approaches zero. Furthermore, it can be inferred that if the temperature of the filter element is maintained at T w = 150°C, the temperature of the air flow will also be heated to T a = 150°C, the same as in the above case 1. Therefore, a power of 7.02 kW is also required. At the same time, the cooling problem of the exhausted air needs to be considered in both case 1 and case 2, increasing the complexity of the device.

[0042] For the time-sharing control scheme proposed in this embodiment, the air exchange of the fan 9 and the energization of the insulating heating wire 3 to heat the filter element 15 work in a time-sharing manner. Since the heat insulation effect of this embodiment is good and the heat conversion efficiency is high, the power required to heat the high-temperature resistant high-efficiency air filter 4 and the high-temperature resistant primary filter cotton 1 to 150°C is only the power of the insulating heating wire. Assuming the same air change rate of 150 m 3 / h, the size of the high-temperature resistant and efficient air filter 4 remains 400 mm in length, 220 mm in width, and 30 mm in height. The thickness and width of the high-temperature resistant filter paper 5 and the aluminum foil partition 6 are both 5 mm. There are 40 pairs of high-temperature resistant filter paper 5 and aluminum foil partitions 6 along the length direction of the filter element. Let the insulating heating wire 3 be wound around the metal aluminum mesh 2 along each layer of aluminum foil partition 6. Then, a total of 40 insulating heating wires 3 with a length of 220 mm are required. Let every 20 wires be connected in series to form 2 insulating heating wires 3 with a length of 4.4 m. These 2 wires are connected in parallel and both ends are electrically connected to the controller 11, with a loaded voltage U = 220V. The resistance of the insulating heating wire is 120Ω / m, so the total resistance R of the insulating heating wire 3 can be calculated to be 264Ω, and then the heating power of the insulating heating wire can be calculated as

[0043]

[0044] If the fan 9 is set to ventilate for 50 minutes and perform high-temperature disinfection and sterilization for 10 minutes per hour in a time-sharing operation, then the actual average power per hour in this embodiment is only one-sixth of the above power, that is Generally, for the actual size of the high-temperature resistant and efficient air filter 4, the resistance, length, and series and parallel connection methods of the insulating heating wire 3 can be further optimized to obtain an optimal energy-saving solution.

[0045] Thus, it can be seen that for an air high-temperature disinfection and sterilization device provided by the present invention, due to the time-sharing operation of high-temperature disinfection and sterilization and ventilation and air change, compared with the methods of directly heating air or heating the filter element while ventilating and air changing, the power consumption is lower, and there is no need to consider the problem of cooling the discharged air, making the device structure simpler.

[0046] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and determined to cover all these other variations or modifications.

Claims

1. An electric heating air filter element, comprising a high-temperature resistant primary filter cotton (1), a metal aluminum mesh (2), an insulating electric heating wire (3), and a high-temperature resistant high-efficiency air filter element (4) installed in sequence, characterized in that, the high-temperature resistant high-efficiency air filter element (4) is assembled by using a high-temperature resistant filter paper (5), an aluminum foil partition (6), a stainless steel outer frame, and a special high-temperature resistant sealant; the two sides of the high-temperature resistant filter paper (5) are folded 180° to form a wedge-shaped pleated layer; the corrugated aluminum foil partition (6) is inserted between adjacent high-temperature resistant filter papers (5), the bottom end of the aluminum foil partition (6) is attached to the bottom of the pleated layer of the high-temperature resistant filter paper (5), and the side surface of the aluminum foil partition (6) is attached to the adjacent high-temperature resistant filter papers (5) on both sides; the metal aluminum mesh (2) is installed on the air inlet side of the high-temperature resistant high-efficiency air filter element (4) and is attached to the aluminum foil partition (6) of the high-temperature resistant high-efficiency air filter element (4); the insulating electric heating wire (3) is fixed on the metal aluminum mesh (2), and the high-temperature resistant primary filter cotton (1) covers the surface of the metal aluminum mesh (2); both ends of the insulating electric heating wire (3) are connected to the working power supply, and after being energized, the high-temperature resistant high-efficiency air filter element (4) and the high-temperature resistant primary filter cotton (1) are heated simultaneously to perform high-temperature disinfection and sterilization on the bacteria and viruses attached thereto; the filter material of the high-temperature resistant filter paper (5) is glass fiber, and the filter material of the high-temperature resistant primary filter cotton (1) is glass fiber.

2. The electric heating air filter element according to claim 1, characterized in that, the insulating electric heating wire (3) is specifically a silicone electric heating wire or a polytetrafluoroethylene electric heating wire.

3. The electric heating air filter element according to claim 1, characterized in that, the fixing method of the insulating electric heating wire (3) to the metal aluminum mesh (2) is: the insulating electric heating wire (3) is wound around the metal aluminum mesh (2) by means of the mesh holes of the metal aluminum mesh (2), or the insulating electric heating wire (3) is pasted on the surface of the metal aluminum mesh (2) by using a high-temperature resistant sealant.

4. The electric heating air filter element according to claim 1, characterized in that, the metal aluminum meshes (2) are respectively installed at the air inlet and outlet of the high-temperature resistant high-efficiency air filter element (4).

5. A low-energy consumption air high-temperature disinfection and sterilization device using the electric heating air filter element according to any one of claims 1-4, characterized in that, it includes a hollow housing (7), an air inlet (8) and an air outlet (10) provided at opposite ends of the housing (7), and the electric heating air filter element (15) and a fan (9) installed in the housing (7) and located between the air inlet (8) and the air outlet (10). A control board (11) is installed on the outer wall of the housing (7), and the control board (11) is electrically connected to the fan (9) and the insulating electric heating wire (3) in the electric heating air filter element (15) respectively through cables to control the fan (9) and the insulating electric heating wire (3) to work in different time periods.

6. The low-energy consumption air high-temperature disinfection and sterilization device according to claim 5, characterized in that, the process of working in different time periods of the control board (11) is: The control board (11) first controls the operation of the blower (9) located within the housing (7). The high-temperature resistant primary filter cotton (1) and the high-efficiency air filter element (4) within the electrically heated air filter element (15) intercept bacteria and viruses in the airflow entering the housing (7) from the air inlet (8). The purified air is discharged from the air outlet (10). During this process, the insulating electric heating wire (3) is not energized for heating. When entering the disinfection period, the control board (11) controls the blower (9) to stop operating, energizes the insulating electric heating wire (3), and uses high temperature to heat both the high-temperature resistant primary filter cotton (1) and the high-temperature resistant high-efficiency air filter element (4) simultaneously, performing high-temperature disinfection on the bacteria and viruses adhering to the electrically heated air filter element (15). After the disinfection is completed, the control board (11) stops energizing the insulating electric heating wire (3), starts the blower (9) to continue operating, and repeats the above process until the predetermined goal is achieved.

7. The low-energy consumption high-temperature air disinfection and sterilization device according to claim 5, characterized in that, a temperature measuring thermocouple (14) is installed inside the high-temperature resistant high-efficiency air filter element (4) to monitor the temperature and feedback it to the control board (11), realizing temperature control heating of the high-temperature resistant high-efficiency air filter element (4).

8. The low-energy consumption high-temperature air disinfection and sterilization device according to claim 5, characterized in that, the heating temperature of the insulating electric heating wire (3) is 120 - 150 °C.

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