Disinfecting air duct

Abstract

The application discloses a disinfection and sterilization air duct. The disinfection and sterilization air duct comprises an air duct, which is used for being communicated with an air outlet of an air conditioner of a passenger car and is internally provided with a disinfection and sterilization device. The disinfection and sterilization device comprises a shell, a wind control switch, a time controller and an ultraviolet lamp arranged on the shell. The wind control switch and the time controller are respectively connected with the ultraviolet lamp and are used for controlling the ultraviolet lamp to disinfect and sterilize air of the air outlet of the air conditioner of the passenger car. The application solves the technical problem that in the related art, spraying disinfectant is used to disinfect and sterilize the inside of the passenger car, which is easy to cause water stains and chemical odor residues in the passenger car.

Description

Technical Field

[0001] This invention relates to the field of bus technology, and more specifically, to a disinfection and sterilization air duct. Background Technology

[0002] As mobile public transportation platforms, the safety of urban buses and highway buses is of paramount importance. How to prevent the spread of the virus through public transportation, ensure the safety of drivers and passengers, and provide a high-quality driving and riding environment has become an urgent issue that the public transportation industry needs to consider.

[0003] However, in the existing technology, the interior of the bus is usually disinfected by spraying disinfectant, which can easily cause water stains and chemical odors to remain inside the vehicle. Moreover, for bus operation, the traditional process of spraying disinfectant will undoubtedly increase labor costs.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This invention provides a disinfection and sterilization air duct to at least solve the technical problem in related technologies where spraying disinfectant to disinfect the interior of a bus easily causes water stains and chemical odor residue.

[0006] According to one aspect of the present invention, a disinfection and sterilization air duct is provided, comprising: an air duct for communicating with the air conditioning outlet of a bus, and a disinfection and sterilization device is provided inside the air duct, wherein the disinfection and sterilization device includes a housing and an air control switch, a timer, and an ultraviolet lamp disposed on the housing, the air control switch and the timer being respectively connected to the ultraviolet lamp for controlling the ultraviolet lamp to disinfect and sterilize the air at the air conditioning outlet of the bus.

[0007] Optionally, the contacts of the wind control switch are in a closed state when there is airflow at the air conditioning vents of the bus, and the ultraviolet lamp is connected to the power supply; or, the contacts of the wind control switch are in a closed state when there is no airflow at the air conditioning vents of the bus, and the ultraviolet lamp is disconnected from the power supply.

[0008] Optionally, the contacts of the timer are in a closed state when the timer is within a preset time range, and the ultraviolet lamp is connected to the power supply; or, the contacts of the timer are in a disconnected state when the timer is not within the preset time range, and the ultraviolet lamp is disconnected from the power supply; wherein, the preset time range is determined according to a first preset time and a second preset time, and the first preset time is less than the second preset time.

[0009] Optionally, the disinfection and sterilization device further includes a photocatalytic lamp cover, wherein the photocatalytic lamp cover is detachably mounted on the housing.

[0010] Optionally, the inner surface of the housing is provided with a mirror-reflective coating.

[0011] Optionally, the disinfection and sterilization device further includes: at least one light-transmitting area is provided on the air duct housing corresponding to the inner surface of the housing.

[0012] Optionally, a light-shielding plate, a two-way cylinder, and a limiting guide rail are provided between the inner surface of the housing and the at least one light-transmitting area.

[0013] Optionally, the disinfection and sterilization device further includes: a solenoid valve, which is disposed on the housing and is used to control the gas flow direction of the bidirectional cylinder to drive the light shield to slide on the limiting guide rail.

[0014] Optionally, the solenoid valve includes a first solenoid valve connected to the wind control switch, wherein the first solenoid valve is in an energized state when the ultraviolet lamp and power supply are on, or in an unenergized state when the ultraviolet lamp and power supply are off.

[0015] Optionally, the solenoid valve includes a second solenoid valve connected to the timer, wherein the second solenoid valve is in a de-energized state when the ultraviolet lamp and power supply are on, or in an energized state when the ultraviolet lamp and power supply are off.

[0016] In this embodiment of the invention, an air duct is used to connect with the air conditioning vents of a bus, and a disinfection and sterilization device is installed inside the air duct. The disinfection and sterilization device includes a housing and an air control switch, a timer, and an ultraviolet lamp installed on the housing. The air control switch and the timer are respectively connected to the ultraviolet lamp to control the ultraviolet lamp to disinfect and sterilize the air at the air conditioning vents of the bus. The disinfection and sterilization air duct provided by this embodiment of the invention can combine the air control switch and the timer to control the ultraviolet lamp to disinfect and sterilize the air at the air conditioning vents of the bus, achieving the purpose of automated ultraviolet disinfection and sterilization. This reduces labor costs and effectively avoids water stains and chemical odor residues caused by spraying disinfectant inside the vehicle. It also solves the technical problem in related technologies where spraying disinfectant to disinfect the interior of a bus easily causes water stains and chemical odor residues inside the vehicle. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of a disinfection and sterilization air duct according to an embodiment of the present invention;

[0019] Figure 2 This is a circuit diagram of a disinfection and sterilization air duct according to an optional embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a disinfection and sterilization air duct according to an optional embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the air circuit of the solenoid valve and the bidirectional cylinder according to an optional embodiment of the present invention.

[0022] The above figures include the following reference numerals:

[0023] 10. Air duct; 11. Air conditioning outlet; 12. Disinfection and sterilization device; 120. Housing; 121. Air control switch; 122. Timer; 123. Ultraviolet lamp; 124. Solenoid valve; 125. Photocatalytic lamp cover; 126. Mirror reflective coating; 127. Light-transmitting area; 128. Limiting guide rail; 129. Light shield; 130. Two-way cylinder. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] According to one aspect of the present invention, a disinfection and sterilization air duct is provided. Figure 1 This is a schematic diagram of a disinfection and sterilization air duct according to an embodiment of the present invention, such as... Figure 1 As shown, the disinfection and sterilization air duct includes: an air duct 10 for connecting to the air conditioning outlet 11 of the bus, and a disinfection and sterilization device 12 is provided inside the air duct 10. The disinfection and sterilization device 12 includes a housing 120 and an air control switch 121, a timer 122, and an ultraviolet lamp 123 provided on the housing 120. The air control switch 121 and the timer 122 are respectively connected to the ultraviolet lamp 123 for controlling the ultraviolet lamp 123 to disinfect and sterilize the air at the air conditioning outlet 11 of the bus.

[0027] As an optional embodiment, one or more ultraviolet lamps 123 are installed inside the housing 120 of the above-mentioned disinfection and sterilization device 12, and the ultraviolet lamps 123 are capable of emitting C-band ultraviolet light.

[0028] As an optional embodiment, the ultraviolet lamp 123 can be controlled by the wind control switch 121 to disinfect and sterilize the air in the air conditioning vent 11 of the bus; the ultraviolet lamp 123 can be controlled by the timer 122 to disinfect and sterilize the air in the air conditioning vent 11 of the bus; or the two methods can be combined to jointly control the ultraviolet lamp 123 to disinfect and sterilize the air in the air conditioning vent 11 of the bus.

[0029] The aforementioned air duct 10 is provided with a sliding groove, and the disinfection and sterilization device 12 is connected to the sliding groove in the air duct 10 by bolts to facilitate the adjustment and maintenance of the disinfection and sterilization device 12.

[0030] In this embodiment of the invention, an air duct 10 is used to connect with the air conditioning vent 11 of the bus. A disinfection and sterilization device 12 is installed inside the air duct 10. The disinfection and sterilization device 12 includes a housing 120 and an air control switch 121, a timer 122, and an ultraviolet lamp 123 installed on the housing 120. The air control switch 121 and the timer 122 are respectively connected to the ultraviolet lamp 123 to control the ultraviolet lamp 123 to disinfect and sterilize the air in the air conditioning vent 11 of the bus. The disinfection and sterilization air duct provided in this embodiment of the invention can combine the air control switch 121 and the timer 122 to control the ultraviolet lamp 123 to disinfect and sterilize the air in the air conditioning vent 11 of the bus, achieving the purpose of automated ultraviolet disinfection and sterilization. This reduces labor costs and effectively avoids water stains and chemical odor residues caused by spraying disinfectant inside the vehicle. It also solves the technical problem in related technologies where spraying disinfectant to disinfect the interior of the bus easily causes water stains and chemical odor residues inside the vehicle.

[0031] Optionally, the contacts of the aforementioned wind control switch 121 are in a closed state when there is airflow at the air conditioning vent 11 of the bus, and the ultraviolet lamp 123 is connected to the power supply; or, the contacts of the wind control switch 121 are in a disconnected state when there is no airflow at the air conditioning vent 11 of the bus, and the ultraviolet lamp 123 is disconnected from the power supply.

[0032] The aforementioned air control switch 121 can be installed at any position on the outside of the housing 120 of the disinfection and sterilization device 12. Generally, its installation position is near the air conditioning vent 11 of the bus. The air control switch 121 can detect whether there is airflow from the air conditioning vent 11 of the bus, thereby adjusting the working state of the contacts of the air control switch 121. It should be noted that one end of the air control switch 121 is connected to the power supply, and the other end is connected to the ultraviolet lamp 123, thus forming an air control circuit. In this air control circuit, the contacts of the air control switch 121 control the connection between the power supply and the ultraviolet lamp 123.

[0033] As an optional embodiment, if the air conditioning vent 11 of the bus is ventilated, the contacts of the air control switch 121 are closed, so that the ultraviolet lamp 123 is connected to the power supply, and the ultraviolet lamp 123 can disinfect and sterilize the air in the air conditioning vent 11 of the bus; if the air conditioning vent 11 of the bus is not ventilated, the contacts of the air control switch 121 are open, so that the ultraviolet lamp 123 is disconnected from the power supply, and the ultraviolet lamp 123 will stop disinfecting and sterilizing the air in the air conditioning vent 11 of the bus.

[0034] Optionally, the contacts of the timer 122 are in a closed state when the timer 122 is within a preset time range, and the ultraviolet lamp 123 is connected to the power supply; or, the contacts of the timer 122 are in a disconnected state when the timer 122 is not within the preset time range, and the ultraviolet lamp 123 is disconnected from the power supply; wherein, the preset time range is determined according to a first preset time and a second preset time, and the first preset time is less than the second preset time.

[0035] The aforementioned timer 122 can be installed at any position on the outside of the housing 120 of the disinfection and sterilization device 12. It should be noted that one end of the timer 122 is connected to the power supply, and the other end is connected to the ultraviolet lamp 123, thereby forming a time control circuit. In this time control circuit, the connection between the power supply and the ultraviolet lamp 123 is controlled by the contacts of the timer 122.

[0036] In specific implementation, the working time of the timer 122 can be set. For example, a preset time range of the timer 122 can be set so that the timer 122 can adjust the working state of the contacts of the timer 122 within the preset time range. It should be noted that the preset time range includes at least a first preset time and a second preset time, and the first preset time is less than the second preset time. Optionally, the contacts of the timer 122 are closed at the first preset time and the contacts of the timer 122 are separated at the second preset time.

[0037] As an optional embodiment, if the timer 122 is within a preset time range, the contacts of the timer 122 are in a closed state, so that the ultraviolet lamp 123 is connected to the power supply, and the ultraviolet lamp 123 can disinfect and sterilize the air in the air conditioning vent 11 of the bus; if the timer 122 is not within the preset time range, the contacts of the timer 122 are in a closed state, so that the ultraviolet lamp 123 is disconnected from the power supply, and the ultraviolet lamp 123 will stop disinfecting and sterilizing the air in the air conditioning vent 11 of the bus.

[0038] As an optional embodiment, the aforementioned time controller 122 is an Internet of Things (IoT) time controller. This IoT time controller possesses multiple communication capabilities, including various communication components such as 4G, 5G, Wi-Fi, and NFC components. These components enable communication connections with external devices. In practice, a mobile terminal can establish a communication connection with the IoT time controller, allowing for remote intelligent control. It should be noted that the mobile terminal includes, but is not limited to, smartphones, smart wearable devices, tablets, and laptops.

[0039] Optionally, the above-mentioned disinfection and sterilization device 12 also includes a photocatalytic lamp cover, wherein the photocatalytic lamp cover is detachably mounted on the housing 120.

[0040] As an optional embodiment, since the ultraviolet lamp 123 is installed at a predetermined position in the housing 120 of the disinfection and sterilization device 12, in order to further improve the air treatment effect on the air conditioning vent 11 of the bus, a photocatalytic lamp cover can be installed around the ultraviolet lamp 123, and the photocatalytic lamp cover can be detachably installed on the housing 120 for easy disassembly or replacement.

[0041] Optionally, the inner surface of the housing 120 is provided with a mirror-reflective coating.

[0042] The aforementioned mirror-reflective coatings include, but are not limited to, nano-paint high diffuse reflection coatings. These mirror-reflective coatings can improve the luminous efficiency of ultraviolet lamps, eliminate glare spots, and thus improve disinfection and sterilization efficiency.

[0043] Optionally, the above-mentioned disinfection and sterilization device 12 further includes: at least one light-transmitting area is provided on the air duct 10 housing corresponding to the inner surface of the housing 120.

[0044] In the specific implementation process, one or more light-transmitting areas can be set on the inner surface of the housing 120 corresponding to the air duct 10 housing. The light-transmitting areas allow the ultraviolet lamp of the disinfection and sterilization device to irradiate the interior space, seats, handrails, interior parts and other surfaces of the bus with ultraviolet light to achieve disinfection and sterilization.

[0045] Optionally, a light shield, a two-way cylinder, and a limiting guide rail are provided between the inner surface of the housing 120 and at least one light-transmitting area.

[0046] The aforementioned light-shielding plate can block light-transmitting areas. In practice, a limiting guide rail and a two-way cylinder can be installed in or near the light-transmitting area, and the light-shielding plate is mounted on the limiting guide rail. The two-way cylinder drives the light-shielding plate to slide on the limiting guide rail. The direction of sliding can be set according to the application scenario. It should be noted that there is no limitation on the number of light-shielding plates, two-way cylinders, and limiting guide rails.

[0047] Optionally, the above-mentioned disinfection and sterilization device 12 further includes: a solenoid valve, which is disposed on the housing and is used to control the gas flow direction of the bidirectional cylinder to drive the light shield to slide on the limiting guide rail.

[0048] The aforementioned solenoid valves include at least a first solenoid valve and a second solenoid valve. The solenoid valves operate in energized and de-energized states (the de-energized state is also known as the normal state). In specific implementation, the first solenoid valve is connected to the air control switch 121, and the second solenoid valve is connected to the timer 122. The air control switch 121 or the timer 122 can change the operating state of the corresponding solenoid valve. The bidirectional cylinder has two air inlets, which correspond to the first and second solenoid valves respectively. By adjusting the operating state of the solenoid valves, the gas flow direction in the two air inlets of the bidirectional cylinder is automatically adjusted, thereby driving the light-shielding plate to slide on the limit guide rail, thus achieving both light-shielding and light-transmitting operation.

[0049] Optionally, the above-mentioned solenoid valves include, but are not limited to, two-position five-way single-electro-controlled solenoid valves.

[0050] Optionally, the solenoid valve includes a first solenoid valve connected to the air control switch 121. When the ultraviolet lamp 123 is connected to the power supply, the first solenoid valve is in an energized state; or when the ultraviolet lamp 123 is disconnected from the power supply, the first solenoid valve is in a de-energized state.

[0051] As an optional embodiment, if the air conditioning vent 11 of the bus is ventilated, the contacts of the air control switch 121 are closed, so that the ultraviolet lamp 123 is connected to the power supply, and the first solenoid valve is in an energized state; if the air conditioning vent 11 of the bus is not ventilated, the contacts of the air control switch 121 are open, so that the ultraviolet lamp 123 is disconnected from the power supply, and the first solenoid valve is in an unenergized state.

[0052] It should be noted that the first solenoid valve is in the left working position when it is in the energized state; the first solenoid valve is in the right working position when it is in the de-energized state.

[0053] Optionally, the solenoid valve includes a second solenoid valve connected to the timer 122. When the ultraviolet lamp 123 is connected to the power supply, the second solenoid valve is in a de-energized state; or when the ultraviolet lamp 123 is disconnected from the power supply, the second solenoid valve is in an energized state.

[0054] As an optional embodiment, if the timer 122 is within a preset time range, the contacts of the timer 122 are closed, so that the ultraviolet lamp 123 is connected to the power supply, and the second solenoid valve is in a de-energized state; if the timer 122 is not within the preset time range, the contacts of the timer 122 are open, so that the ultraviolet lamp 123 is disconnected from the power supply, and the second solenoid valve is in an energized state.

[0055] It should be noted that the second solenoid valve is in the right working position when it is energized; the first solenoid valve is in the left working position when it is de-energized.

[0056] The following is a detailed description of an optional embodiment of the present invention.

[0057] The optional disinfection and sterilization air duct of this invention intelligently controls the coordinated operation of relevant modules through a wind control switch and a timer. Utilizing the disinfection and sterilization capabilities of C-band ultraviolet light and photocatalytic air purification, it achieves real-time disinfection and purification of the air inside the vehicle through the air conditioning circulation system. Simultaneously, it disinfects and sterilizes the seats, armrests, and trim components after the vehicle is stopped, ensuring a healthy and safe in-vehicle environment. Furthermore, the use of ultraviolet disinfection avoids the water stains and chemical odor residues caused by spraying traditional disinfectants.

[0058] Figure 2 This is a circuit diagram of a disinfection and sterilization air duct according to an optional embodiment of the present invention, such as... Figure 2 As shown, the circuit of the disinfection and sterilization air duct includes at least: air control switch 121, timer 122, ultraviolet lamp 123, and solenoid valve 124.

[0059] Among them, the wind control switch 121 can be used to detect whether there is airflow at the air conditioner outlet. If there is airflow, the contacts close to connect the circuit; if there is no airflow, the contacts separate to disconnect the circuit.

[0060] The timer 122 allows manual setting of the start and end times for contact closure. Within the preset working time range, the contacts close, connecting the circuit; outside the time range, the contacts separate, disconnecting the circuit. In practical implementation, since vehicle interior disinfection needs to be activated late at night when no one is around, the preset time is set to 0:00-1:00 AM, with continuous disinfection for 1 hour. If the timer 122 is replaced with an IoT timer, it can be remotely controlled via a mobile app through a 4G network, enabling intelligent remote control.

[0061] Figure 3 This is a schematic diagram of a disinfection and sterilization air duct according to an optional embodiment of the present invention, such as... Figure 3 As shown, the disinfection and sterilization air duct includes at least: an air duct 10 and a disinfection and sterilization device 12. The disinfection and sterilization device 12 may include at least: a housing 120, a wind control switch 121, a timer 122, an ultraviolet lamp 123, a solenoid valve 124, a photocatalytic lamp cover 125, a mirror reflective coating 126, a light-transmitting area 127, a limiting guide rail 128, a light-shielding plate 129, a two-way cylinder 130, and other accessories. The inner surface of the housing is coated with a mirror reflective coating 126, which can effectively reflect ultraviolet rays and improve the disinfection and sterilization efficiency. The light-shielding plate 129 can slide freely up and down under the action of the two-way cylinder 130 and the limitation of the limiting guide rail 128 to achieve both light-shielding and light-transmitting conditions. The disinfection and sterilization device 12 is also bolted to the sliding groove inside the bus air duct for easy adjustment and maintenance.

[0062] In practical implementation, the ultraviolet lamps 123 inside the air duct 10 are linked to the air conditioning system. During operation, the ultraviolet lamps 123 inside the air duct 10 are activated simultaneously with the air conditioning. Using C-band ultraviolet light, they irradiate the air exhausted from the air conditioning vent 11, utilizing the bactericidal ability of C-band ultraviolet light to destroy the DNA and RNA of bacteria and viruses in the air, rendering them ineffective and unable to reproduce. The photocatalytic mesh, acting as a lampshade, generates a strong catalytic degradation function under ultraviolet irradiation, effectively killing various bacteria and decomposing and neutralizing toxins released by bacteria or fungi. It also has functions such as formaldehyde removal, TVOC removal, and deodorization, ensuring that the air exhausted from the air conditioning vent 11 into the air duct is clean and harmless before entering the passenger compartment. Because the ultraviolet lamps 123 are installed inside the air duct 10, the ultraviolet light will not be emitted during passenger operation, thus meeting the disinfection and sterilization needs during travel.

[0063] When the bus is parked in the parking lot for maintenance, the time controller 122 is preset to be turned on from 0:00 to 1:00 at night. When the preset time of the time controller 122 is reached, the ultraviolet lamp 123 is turned on and the sunshade 129 is opened. It continues to work according to the duration set by the time controller 122, allowing the bus to automatically irradiate the interior space, seats, handrails, interior parts and other surfaces with ultraviolet light when no one is on board. This effectively kills the residual bacteria that adhere to the interior and other items after a day of operation, ensuring cleanliness and safety when the bus is put back into operation and avoiding multiple contaminations.

[0064] Because it uses automatic ultraviolet disinfection, the traditional process of spraying disinfectant has been eliminated. This reduces the operating company's labor costs and effectively avoids water stains and chemical odors left inside the vehicle due to spraying disinfectant, thus preventing inconvenience to drivers and passengers.

[0065] Figure 4 This is a schematic diagram of the air circuit of the solenoid valve and the double-acting cylinder according to an optional embodiment of the present invention, as shown below. Figure 4 As shown, the first solenoid valve is denoted as D1, the second solenoid valve is denoted as D2, and the two-way cylinder includes cylinder A and cylinder B.

[0066] The UV lamp power input control switch (which detects whether air is coming out of the air conditioning vent) can independently control the UV lamp power input, controlling the first solenoid valve. When there is airflow, the UV lamp power input control switch circuit is connected, and the first solenoid valve is energized (left working position). When there is no airflow, the UV lamp power input control switch circuit is disconnected, and the first solenoid valve is de-energized (right working position). The timer can independently control the UV lamp power input, controlling the second solenoid valve. Before the preset time point, the UV timer circuit is disconnected, and the second solenoid valve is de-energized (left working position). When the preset time range is reached, the UV timer circuit is connected, and the second solenoid valve is energized (right working position). It should be noted that when the bidirectional cylinder moves upward, the light shield closes; when the bidirectional cylinder moves downward, the light shield opens.

[0067] As an optional embodiment, when the air conditioner has no airflow and the preset time of the timer has not yet arrived (when the vehicle is parked and not in operation and the air conditioner is not used while driving): the air control circuit and the timer circuit are both disconnected, and the ultraviolet lamp is turned off; the first solenoid valve is de-energized (right working position), the second solenoid valve is de-energized (left working position), and the gas flow direction is: 1 (D1) → 4 (D1) → 1 (D2) → 2 (D2) → B intake; A → 4 (D2) → 5 (D2) exhaust, cylinder B intake and A exhaust, maintaining the upward push state, and the sunshade is closed.

[0068] As an optional embodiment, when the air conditioner is blowing air and it is not yet the preset time point of the time controller (the state of using the air conditioner while driving): the air control circuit is connected and the ultraviolet lamp is turned on; the first solenoid valve is energized (left working position), the second solenoid valve is de-energized (left working position), the gas flow direction is: 1 (D1) → 2 (D1) → 3 (D2) no air intake; A → 4 (D2) → 5 (D2) exhaust; B → 2 (D2) → 1 (D2) → 4 (D1) → 5 (D1) exhaust, both cylinders A and B exhaust, there is no pressure difference, the cylinders remain in the upward pushing state under the action of damping, and the sunshade is closed.

[0069] It should be noted that in this state, the air outlet of the duct is guaranteed to be treated by ultraviolet light and photocatalysis, ensuring that the indoor air is disinfected, sterilized, and purified; at the same time, closing the sunshade can prevent ultraviolet light from leaking out during the journey and causing harm to passengers.

[0070] As an optional embodiment, when the air conditioner is blowing air and the timer presets the time (a special case where the air conditioner needs to be used for nighttime driving): the air control circuit and the timer circuit are both connected, and the ultraviolet lamp is turned on; the first solenoid valve is energized (left working position), the second solenoid valve is energized (right working position), and the gas flow direction is: 1 (D1) → 2 (D1) → 3 (D2) → 2 (D2) → B intake; A → 4 (D2) → 1 (D2) → 4 (D1) → 5 (D1) exhaust, cylinder B intakes air and A exhausts air, maintaining the upward push state, and the sunshade is closed.

[0071] It should be noted that in this state, the air outlet of the duct is guaranteed to be treated by ultraviolet light and photocatalysis, ensuring that the indoor air is disinfected, sterilized, and purified; at the same time, closing the sunshade can prevent ultraviolet light from leaking out during the journey and causing harm to passengers.

[0072] As an optional embodiment, when the air conditioner has no airflow and the preset time point of the timer is reached (nighttime parking, reaching the preset sterilization time point): the timer circuit is connected, the ultraviolet lamp is turned on; the first solenoid valve is in the de-energized state (right working position), the second solenoid valve is in the energized state (right working position), the gas flow direction is: 1 (D1) → 4 (D1) → 1 (D2) → 4 (D2) → A intake; B → 2 (D2) → 3 (D2) → 2 (D1) → 3 (D1) exhaust, cylinder A intakes air and B exhausts air, maintaining the downward push state, the light shield is opened.

[0073] It should be noted that in this state, the sun visor is open, the ultraviolet lamp is on, and ultraviolet light irradiates the interior space, seats, armrests, and interior surfaces through the air duct's light-transmitting area, achieving disinfection and sterilization. When the preset sterilization time ends, the timer disconnects, the ultraviolet lamp turns off, and the second solenoid valve changes to the de-energized state. At this time, the gas flow direction is: first solenoid valve de-energized (right working position), second solenoid valve de-energized (left working position), gas flow direction: 1 (D1) → 4 (D1) → 1 (D2) → 2 (D2) → B intake; A → 4 (D2) → 5 (D2) exhaust, cylinder B intake and A exhaust, maintaining the upward push state, the sun visor closes. Automatic nighttime interior sterilization is completed.

[0074] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0075] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0076] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0077] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0078] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0079] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0080] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A disinfection and sterilization air duct, characterized in that, include: The air duct is used to connect to the air conditioning vents of the bus, and a disinfection and sterilization device is installed inside the air duct. The disinfection and sterilization device includes a housing and a wind control switch, a timer, and an ultraviolet lamp mounted on the housing. The wind control switch and the timer are respectively connected to the ultraviolet lamp to control the ultraviolet lamp to disinfect and sterilize the air from the air conditioning vents of the bus. The disinfection and sterilization device further includes at least one light-transmitting area on the inner surface of the housing corresponding to the air duct housing. A light-shielding plate, a two-way cylinder, and a limiting guide rail are provided between the inner surface of the housing and the at least one light-transmitting area. The disinfection and sterilization device further includes: a solenoid valve, which is disposed on the housing and is used to control the gas flow direction of the bidirectional cylinder to drive the light-shielding plate to slide on the limiting guide rail. The solenoid valve includes a first solenoid valve, which is connected to the wind control switch. When the ultraviolet lamp and the power supply are connected, the first solenoid valve is in an energized state, and when the ultraviolet lamp and the power supply are disconnected, the first solenoid valve is in a de-energized state. The solenoid valve includes a second solenoid valve, which is connected to the timer. When the ultraviolet lamp and power supply are on, the second solenoid valve is in a de-energized state, and when the ultraviolet lamp and power supply are off, the second solenoid valve is in an energized state. When there is airflow from the air conditioning vents of the bus, the contacts of the wind control switch are in a closed state, and the ultraviolet lamp is connected to the power supply; when there is no airflow from the air conditioning vents of the bus, the contacts of the wind control switch are in a closed state, and the ultraviolet lamp is disconnected from the power supply. When the timer is within a preset time range, the contacts of the timer are in a closed state, and the ultraviolet lamp is connected to the power supply; when the timer is not within the preset time range, the contacts of the timer are in a disconnected state, and the ultraviolet lamp is disconnected from the power supply; wherein, the preset time range is determined according to a first preset time and a second preset time, and the first preset time is less than the second preset time.

2. The air duct according to claim 1, characterized in that, The disinfection and sterilization device also includes a photocatalytic lamp cover, wherein the photocatalytic lamp cover is detachably mounted on the housing.

3. The air duct according to claim 1, characterized in that, The inner surface of the housing is provided with a mirror-reflective coating.

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