RU214800U1 - ELEVATOR CAR EXTERNAL RECIRCULATION - Google Patents

Abstract

The utility model relates to electrical devices for air disinfection in an elevator car. The external recirculator for lift cabins contains a rectangular case with an inlet and outlet, a filter installed inside the case, a power supply unit, a fan electrically connected to the power supply unit, and ultraviolet LEDs. Additionally includes a second power supply for UV LEDs. These power supplies are installed in a box, and UV LEDs are installed on a substrate along the case, the case is made with a thickness of no more than 35 mm, the filter is installed in a replaceable cassette. The design provides effective air purification in the elevator cabins while increasing the service life of the recirculator installed on the outside of the elevator cabin. 2 w.p. f-ly.

Description

The utility model relates to electrical devices for air disinfection in an elevator cabin, where it is necessary to recirculate the air during a short stay of people in it.

The spread of viruses dictates new requirements for the epidemiological safety of the population in cities. Considering the mechanisms of transmission of infections, one of the directions for interrupting the transmission of viruses is air purification in common areas, for example, in elevator cabins. Since elevator cabins are public facilities and have a limited volume, transport a large number of people, they are highly likely to spread viruses.

From the prior art, an ultraviolet bactericidal air recirculator is known, containing a housing with a fan located inside it, a source of UV radiation in the spectral range of 205-315 nm. In this case, the upper part of the body is made removable with a central and beveled end sections made with perforation, and the base of the body is provided with fasteners for fastening to the support. The recirculator is equipped with a removable mounting module, which consists of three adjacent pockets mounted on a box-shaped base with the possibility of installation in the central pocket of the fan, and in two side pockets - a source of UV radiation. All sections of the removable upper part, except for the location of the fan, have perforations in the form of holes evenly spaced in rows, the total area of which in each section of the removable upper part of the housing is 25% of its area. Each bevelled edge section makes an angle of 30° with the base of the body. The housing base is equipped with a divider installed under the fan, made in the form of a gable roof of two identical inclined planes separated by a rib directed along the axis of symmetry of the recirculator, while the angle between the inclined planes is 150° (RU 209286 U1, pub. 03/22/2021, A61L 9 /twenty).

Known device ultraviolet sterilization used for air circulation in the elevator car. The device includes a housing, on the inner lower end of which there is a filter mesh, an ultraviolet sterilization lamp located on the upper side of the filter mesh, an air collection cover. The circulation fan is located in the middle part of the cover. The air outlet is located on the circulation fan housing. The upper end of the air collector cover is equipped with a control board connected to the power outputs of the ultraviolet lamp and the circulation fan with conductive wires (CN 107648656 A, pub. 02.02.2018, A61L 9/20).

The closest analogue of the claimed device is a bactericidal air recirculator for an elevator cabin, containing a housing with air inlet and outlet channels, a board with UV LEDs and two fans are installed inside the housing. One of the fans is installed on the inner surface of the housing near the air inlet, and the second one is installed on the inner surface of the housing near the air outlet. The body is fixed to the bracket, which can be fixed to the wall of the compartment of the elevator cabin. A recirculator closed state control switch, a control board, a photodiode for controlling the UV radiation power, an LED indicator, a casing, a radiator containing a thermistor and a board with UV LEDs, a power board (RU 203102 U1, pub. 03/22/2021, A61L 9) are fixed to the case. /twenty).

The disadvantage of the above devices is the impossibility of installing them on the outer surface of the body of the elevator car due to the design. The recirculator installed inside the cabin affects the useful volume of the cabin, is not resistant to external influences, because it does not have a vandal-resistant housing.

The case of recirculators has significant dimensions. The effective radius of UV LEDs is 20 mm, which is shown in the technical specifications of these components. Accordingly, the entire volume of air that passes at a greater distance from radiation is less susceptible to the disinfecting properties of ultraviolet radiation.

Ultraviolet light, in addition to disinfection, adversely affects electronic components that are located in the direct line of sight of radiation. In most cases, the design of recirculators does not provide protection against it, so the fan, wires and power supply cases dry out, become brittle, which can lead to failure of the entire product.

The task to be solved by the claimed utility model is to ensure the possibility of installing a recirculator on the outer surface of the elevator car body with uniform irradiation of the air passing through the recirculator with ultraviolet LEDs, as well as the implementation of a quick filter change.

The technical result of the claimed utility model is to increase the efficiency of air purification in elevator cabins while increasing the service life of the recirculator.

The claimed technical result is achieved by the fact that the recirculator for elevator cabins contains a rectangular housing with an inlet and outlet, a filter installed inside the housing, a power supply, a fan electrically connected to the power supply, and ultraviolet LEDs, according to the utility model, the recirculator additionally includes a second ultraviolet power supply LEDs. In this case, said power supplies are installed in a box, and said ultraviolet LEDs are mounted on a substrate along the case. The body is made with a thickness of not more than 35 mm, the filter is installed in a replaceable cassette.

In particular cases of the utility model, a bushing is installed on the housing, and the ratio of the width of the housing to the length is more than 1:8.

The utility model is illustrated by graphic images, where:

- figure 1 shows a General view of the recirculator;

- figure 2 - diagram of the installation of the recirculator on the elevator car.

On the drawings:

1 - recirculator body;

2 - fan;

3 - ultraviolet LEDs;

4 - substrate;

5 - power supply for LEDs;

6 - power supply for the fan;

7 - replaceable filter cassette;

8 - filter;

9 - protective box for power supplies;

10 - bushing;

11 - elevator car

12 - ventilation openings of the elevator cabin.

The claimed recirculator for elevator cabins is arranged as follows. It contains a rectangular case 1 (see figure 1) with input and output (not shown in the figures), installed inside the case 1 filter 8, power supply 6, fan 2, electrically connected to the power source 6, and ultraviolet LEDs 3. Second power supply 5 for UV LEDs 3. Fan power supply 6 and power supply 5 for UV LEDs 3 are installed in box 9. UV LEDs 3 are installed on substrate 4 along housing 1. Housing 1 is made with a thickness of no more than 35 mm. Filter 8 is installed in cartridge 7.

In particular cases of the utility model, a bushing 10 is installed on the body 1, which protects the wire from wear, and the ratio of the width of the body 1 to the length is more than 1:8.

The operation of the claimed device is as follows.

The air recirculator is installed on the body of the elevator car 11 and attached to the wall outside the elevator car, so that the inlet and outlet coincide with the ventilation holes 12 of the elevator car (figure 2). Why the recirculator contains fasteners (not shown in the drawing), which is fixed on the wall of the elevator cabin using, for example, bolts and screws.

The power supply of the recirculator can be connected to both the free terminals of the elevator car and the lighting of the car, which provides the advantage of a quick connection of the device and its installation without the need for refurbishment of the car or an extended shutdown of the elevator. When the power supply of the recirculator is connected to the cabin lighting, the recirculator operates only when the light is on, i.e. when the elevator is in operation, which extends the life of the UV LEDs and ensures energy efficiency.

The directional air flow inside the recirculator is created by a fan, which makes it possible to uniformly irradiate the entire air flow passing inside the rectangular body of the recirculator.

UV LEDs are not subject to dynamic loads, like lamps. In the case of using them in elevator cabins, they will not break and break in the event of an emergency. Previously used for a similar purpose, UV lamps contain mercury, which can poison the human body. UV LEDs eliminate this possibility.

The LEDs have an individual power source, and the fan has its own, which allows you to individually control the on and off of these elements if necessary. Also, in the event of an output and failure of the LED power supply, the fan will continue to work and clean the air from dust through a filter. In case of failure of the fan power supply, the air will be disinfected inside the recirculator and the cabin due to natural air convection. Performance will drop. To protect against ultraviolet light, which adversely affects the components of the recirculator, which are located in direct visibility of ultraviolet radiation, power sources 6.5 are installed in box 9.

The design of the recirculator contains a replaceable filter cassette, which, taking into account the installation in the cassette, can be quickly replaced if necessary, which contributes to the efficiency of air purification. A thin body no more than 35 mm thick allows you to install it from the shaft to the cabin body and at the same time not modify the existing cabin. The fan creates a vacuum inside the recirculator and the air is drawn into the filter, filtering out large debris. The air, passing through the irradiation zone, preferably 550 mm long, has time to clear itself and exits the recirculator back into the cabin.

The claimed utility model can be manufactured in industrial production using standard equipment.

Claims (3)

1. A recirculator for elevator cabins, containing a rectangular case with an inlet and outlet, a filter installed inside the case, a power supply, a fan electrically connected to the power supply, and ultraviolet LEDs, characterized in that it includes an additional power supply for powering ultraviolet LEDs, while These power supplies are installed in a box, UV LEDs are installed on a substrate along the body, the body is made with a thickness of no more than 35 mm, the filter is installed in a replaceable cassette. 2. The recirculator according to claim 1, characterized in that a bushing is installed on the body. 3. The recirculator according to claim 1, characterized in that the ratio of the body width to length is more than 1:8.

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