CN215901131U

CN215901131U - Gas filtering device

Info

Publication number: CN215901131U
Application number: CN202120788947.9U
Authority: CN
Inventors: 曹学明; 孔涛; 顾伟; 张秋实; 陈伟忠; D·P·凯利
Original assignee: Koninklijke Philips NV
Current assignee: Fansongni Holdings Ltd
Priority date: 2021-04-16
Filing date: 2021-04-16
Publication date: 2022-02-25
Anticipated expiration: 2031-04-16

Abstract

Embodiments of the present disclosure relate to gas filtration devices. The gas filtering device comprises: a housing having an air inlet and an air outlet; a fan disposed inside the housing and configured to cause gas to flow into the housing via the gas inlet and out of the housing via the gas outlet, wherein a rotational speed of the fan is controllable in accordance with an operating mode in which the gas filtering device is located; a filter screen disposed between the air inlet and the fan to filter air flowing in the housing; and a heating frame disposed between the air inlet and the filter net and fixing a heating wire which heats the air flowing in the housing in a state where the air filtering device is in a sterilization mode. By arranging the heating wire between the air inlet and the filter screen, the filter screen can be heated by heating the flowing gas, so that the filter screen is sterilized and disinfected.

Description

Gas filtering device

Technical Field

Embodiments of the present disclosure relate to appliances, and more particularly, to gas filtration devices.

Background

Air purifier devices are used to remove pollutants from air. A conventional air purifier includes a fan for generating an air flow and a screen for filtering the air flow, so that particles propagated through the air flow are adsorbed to the screen and purified air is discharged from the air purifier. After some time of use, the filter screen will become clogged with adsorbed particles and the filter capacity will also decrease. It is necessary to periodically replace the filter net in order to maintain the purification efficiency of the air purifier.

However, in addition to smoke, dust, harmful gases, etc., a large amount of bacteria and viruses may be accumulated in the filter. Users may be exposed to these bacteria and viruses when replacing the filter screens, resulting in secondary contamination. Therefore, a new solution is needed to kill bacteria and viruses in the screen.

SUMMERY OF THE UTILITY MODEL

Embodiments of the present disclosure provide a gas filtration device that addresses, at least in part, the above and other potential problems.

According to an embodiment of the present disclosure, a gas filtration device is provided. The gas filtering device comprises: a housing having an air inlet and an air outlet; a fan disposed inside the housing and configured to cause gas to flow into the housing via the gas inlet and out of the housing via the gas outlet, wherein a rotational speed of the fan is controllable in accordance with an operating mode in which the gas filtering device is located; a filter screen disposed between the air inlet and the fan to filter air flowing in the housing; and a heating frame disposed between the air inlet and the filter net and fixing a heating wire which heats the air flowing in the housing in a state where the air filtering device is in a sterilization mode.

According to the embodiment of the present disclosure, by providing the heating wire between the air inlet and the filter screen, the filter screen can be heated by heating the air flowing therethrough, thereby sterilizing the filter screen.

In some embodiments, the gas filtration device further comprises: a temperature sensor configured to measure a temperature of the screen, wherein at least one of a power and a heating time of the heating wire is adjustable based on the measured temperature. In this way, the temperature of the filter screen can be accurately adjusted, and therefore a better sterilization and disinfection effect is achieved.

In some embodiments, the heating rack has the same dimensions as the screen. In this way, the entire filter screen can be heated and the heating rack can be easily inserted into the gas filter device.

In some embodiments, the heating wires are uniformly distributed on the heating rack. In this way, the filter screen can be uniformly heated, so that the sterilization and disinfection effects are improved.

In some embodiments, the cross-sectional diameter of the heating wire is in the range of 3mm to 3 cm. In this way, the heating wire can be rapidly warmed in the sterilization mode without significantly affecting the flow of the air stream in the purification mode.

In some embodiments, the spacing between adjacent ones of the heating wires is in the range of 0.5 to 10 times the cross-sectional diameter of the heating wires. In this way, the proper distance between the heating wires can be selected according to actual needs, so that the heating efficiency in the sterilization and disinfection mode is improved, and the flow of the air flow is not obviously influenced in the purification mode.

In some embodiments, the gas filtration device further comprises an enclosure for housing the enclosure within the enclosure cavity when the gas filtration device is in the sterilization mode. In this way, volatile organic compounds released by the filter screen after heating can be prevented from being released into the environment to be purified.

In some embodiments, the gas filtering device further comprises a volatile organic compound filter, and the volatile organic compound filter is arranged between the fan and the gas outlet or on one side of the gas outlet far away from the fan and is used for adsorbing volatile organic compounds in the gas. In this way, volatile organic compounds released by the filter screen after heating can be prevented from being released into the environment to be purified.

In some embodiments, the gas filtration device further comprises an indicator configured to present an indication that the gas filtration device is in the sterilization and disinfection mode. In this way, the operating state of the gas filtering device can be conveniently indicated to the user for the convenience of the user.

In some embodiments, the gas filtering apparatus further comprises a short-circuit protection element for preventing the heating wire from being short-circuited. In this way, it is possible to prevent the gas filtering apparatus from malfunctioning, thereby improving the safety of the gas filtering apparatus and accordingly reducing the maintenance cost of the gas filtering apparatus.

In some embodiments, the screen is a high efficiency air filter. In this way, an efficient gas purification capability can be provided.

In some embodiments, the gas filtering device further comprises a pre-filter screen disposed between the heating rack and the gas inlet. In this way, the service time of the filter screen can be extended and the housing of the gas filtering device can be kept below a safe temperature.

According to the embodiment of the present disclosure, through set up the heater strip between air inlet and filter screen, under the disinfection state that disinfects, the heater strip can heat the gas that flows through to utilize the gas through the heating to heat the filter screen, reach the certain time through heating the filter screen with the uniform temperature, can kill bacterium and virus that exist on the filter screen high-efficiently.

It should be understood that this summary is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other objects, features and advantages of the embodiments of the present disclosure will become more readily understood through the following detailed description with reference to the accompanying drawings. Various embodiments of the present disclosure will be described by way of example and not limitation in the accompanying drawings, in which:

fig. 1 shows a schematic block diagram of a gas filtering device according to a first embodiment of the present disclosure;

FIG. 2 shows a schematic view of a heating rack of the gas filtration device of FIG. 1;

fig. 3 shows a schematic block diagram of a gas filtering device according to a second embodiment of the present disclosure;

fig. 4 shows a schematic block diagram of a gas filtering apparatus according to a third embodiment of the present disclosure; and

fig. 5 shows a schematic structural block diagram of a gas filtering apparatus according to a fourth embodiment of the present disclosure.

Detailed Description

The concepts of the present disclosure will now be described with reference to various exemplary embodiments shown in the drawings. It should be understood that these examples are described merely to enable those skilled in the art to better understand and further practice the present disclosure, and are not intended to limit the scope of the present disclosure in any way. It should be noted that where feasible, similar or identical reference numerals may be used in the figures and similar or identical reference numerals may denote similar or identical elements. It will be appreciated by those skilled in the art from the following description that alternative embodiments of the structures and/or methods illustrated herein may be employed without departing from the principles and concepts of the disclosure as described.

In the context of the present disclosure, the term "comprising" and its various variants can be understood as open-ended terms, which mean "including but not limited to"; the term "based on" may be understood as "based at least in part on"; the term "one embodiment" may be understood as "at least one embodiment"; the term "another embodiment" may be understood as "at least one other embodiment". Other terms that may be present but are not mentioned herein should not be construed or limited in a manner that would contradict the concept upon which the embodiments of the disclosure are based unless explicitly stated.

As described above, a large amount of bacteria and viruses may be accumulated in the filter net, resulting in a user's easy secondary contamination when replacing the filter net.

According to an example embodiment of the present disclosure, a gas filtration device is provided. The gas filtering device comprises: a housing having an air inlet and an air outlet; a fan disposed inside the housing and configured to cause gas to flow into the housing via the gas inlet and out of the housing via the gas outlet, wherein a rotational speed of the fan is controllable in accordance with an operating mode in which the gas filtering device is located; a filter screen disposed between the air inlet and the fan to filter air flowing in the housing; and a heating frame disposed between the air inlet and the filter net and fixing a heating wire which heats the air flowing in the housing in a state where the air filtering device is in a sterilization mode. By arranging the heating wire between the air inlet and the filter screen, the filter screen can be heated by heating the flowing gas, so that the filter screen is sterilized and disinfected.

The configuration of the gas filtering device 10 according to an exemplary embodiment of the present disclosure will be described in detail below with reference to fig. 1. In describing the respective embodiments or examples in connection with the drawings, the directional terms referred to are intended to facilitate an understanding of the description of the embodiments of the disclosure, such as "upper", "lower", "vertical", "horizontal", "longitudinal", "top", "bottom", etc., based on either the orientation presented by the reader when viewing the view or the normal direction of use of the product itself, and do not impose undesirable limitations on the scope of the disclosure.

Fig. 1 shows a schematic structural block diagram of a gas filtering device 10 according to a first embodiment of the present disclosure. As shown, the gas filtering device 10 may include a housing 14, a fan 12, a screen 18, and a heating rack 20. As shown, the air inlet 16 and the air outlet 22 may be disposed on opposite sides of the housing 14 from the housing 14. However, the configuration of the air inlet 16 and the air outlet 22 is not limited thereto. For example, in one embodiment, the air inlet 16 and the air outlet 22 may be located on the same surface of the housing 14. In another embodiment, the air inlet 16 and the air outlet 22 may be located on any two different surfaces of the housing 14, respectively.

The fan 12 may be disposed inside the enclosure 14 and configured to flow gas into the enclosure 14 via the gas inlet 16 and out of the enclosure 14 via the gas outlet 22. The arrows in fig. 1 indicate the direction of flow of the gas under the drive of the fan 12. The speed of the fan 12 may be controlled depending on the mode of operation of the gas filtration device 10. Additionally, the gas filtration device 10 may also include a controller 26. The controller 26 may be configured to control the rotational speed of the fan 12 depending on the mode of operation in which the gas filtration device 10 is operated. In one embodiment, gas filtration device 10 may be operated in either a sterilization mode or a purification mode. The rotation speed of the fan 12 in the sterilization/disinfection mode may be controlled to be equal to or lower than the minimum rotation speed of the fan 12 in the purification mode (e.g., the rotation speed of the fan 12 in the sleep mode), thereby improving the heat transfer efficiency.

A screen 18 may be disposed between the air inlet 16 and the fan 12 for filtering air flowing within the housing 14. A heating rack 20 may be disposed between the air inlet 16 and the screen 18. To more intuitively illustrate the structure of the heating rack, fig. 2 shows a schematic view of the heating rack 20 of the gas filtering device 10 shown in fig. 1. As shown in fig. 2, the heating rack 20 may be configured to secure the heating wire 28. Returning to fig. 1, when the gas filtering device 10 is in the sterilization mode, the heater wire 28 on the heater rack 20 may heat the gas flowing within the housing 14. In the sterilization mode, the heated gas can heat the filter screen when flowing through the filter screen, thereby sterilizing the filter screen.

In one embodiment, the gas filtration device 10 may include a temperature sensor 24. The temperature sensor 24 is configured to measure a temperature of the sieve 18, wherein at least one of the power and the heating time of the heating wire 28 can be adjusted based on the measured temperature. In one embodiment, the controller 26 may be electrically connected to the temperature sensor 24 and to the

leads

30 and 32 of the heating wire 28. The controller 26 may adjust at least one of the power and the heating time of the heating wire 28 based on the temperature measurement signal received from the temperature sensor 24. In one embodiment, the screen 18 may be heated to a specific temperature in the range of 40 ℃ to 130 ℃. The heating time of the screen 18 may be set in the range of 30 minutes to two hours. In one embodiment, the controller 26 may control the power and heating time of the heating wire 28 to maintain the sieve 18 at a corresponding predetermined temperature for a predetermined time, depending on the type of bacteria or viruses selected by the user to be killed. In another embodiment, the controller 26 may control the power and heating time of the heating wire 28 based on a desired heating temperature and heating time of the screen 18 as selected by a user. By maintaining the screen at the desired temperature for a period of time, bacteria and viruses present on the screen can be killed.

In one embodiment, the gas filtration device 10 may further include an indicator (not shown). The indicator may be configured to present an indication that the gas filtration device 10 is in the sterilization and disinfection mode. For example, the indicator may be an audible indication and/or a visual indication. In one embodiment, the indicator may be an LED light that may flash when the gas filtration device 10 is in the sterilization mode. In this manner, the operational status of the gas filtering apparatus can be conveniently indicated to the user for further operations by the user, such as timely switching the gas filtering apparatus 10 to a cleaning mode or timely replacing the filter screen 18 after the sterilization mode is terminated.

In one embodiment, the gas filtering device 10 may further include a short-circuit protection element for preventing the heating wire 28 from being short-circuited.

In one embodiment, the screen 18 may be a HEPA high efficiency air filter. Alternatively, the screen 18 may be another filter having an air cleaning function.

In one embodiment, the heating rack 20 may have the same shape and size as the screen 18. In this way, the entire screen may be heated. Furthermore, the heating rack can be easily embedded in the gas filtering device.

In one embodiment, the heating wires 28 may be evenly distributed on the heating rack 20 to achieve uniform heating of the screen. As shown in fig. 2, the heating wires 28 are evenly distributed on the heating rack 20 in the transverse direction, however, the arrangement of the heating wires 28 is not limited to this, and for example, the heating wires 28 may be evenly distributed at a certain inclination angle.

In one embodiment, the cross-sectional diameter of the heating wire 28 may be in the range of 3mm to 3 cm. The spacing between adjacent ones of the heater wires 28 may be in the range of 0.5 to 10 times the cross-sectional diameter of the heater wires 28. In this way, the proper distance and diameter of the heating wire can be selected according to actual needs, so that the heating wire can be rapidly heated in a sterilization and disinfection mode, and the flow of air flow can not be obviously influenced in a purification mode.

The filter screen can adsorb Volatile Organic Compounds (VOC) harmful to human bodies in a purification mode. However, when the filter is heated, the VOC adsorbed in the filter may be released and escape the outlet 22 along with the air flow and enter the environment to be purified. Therefore, it is desirable to avoid the release of VOCs in the germicidal mode of sterilization.

Fig. 3 shows a schematic structural block diagram of a gas filtering device 10 according to a second embodiment of the present disclosure. The same structural components in fig. 3 and 1 will not be described again, and only the differences therebetween will be described here.

As shown in fig. 3, the gas filtering device 10 may further include a containment box 36. Enclosure 36 is configured to enclose housing 14 within the enclosed cavity formed by enclosure 36 when gas filtration device 10 is in the sterilization mode. In this manner, VOC released by the heating of the screen 18 is confined within the enclosed cavity. When the sterilization mode is finished and the heating of the filter net 18 is stopped, the temperature of the filter net 18 is lowered, so that the VOC in the closed chamber can be adsorbed again. In one embodiment, VOC released during heating can be absorbed within 1 hour.

In one embodiment, containment box 36 may be a separate component from housing 14, such as a sealed enclosure. In the purge mode, the enclosure 14 and its internal components are located outside the enclosure 36 for purging gases from the environment. In the sterilization mode, the enclosure 14 and its internal components are positioned within the containment box 36 (e.g., the enclosure 14 is covered with a sealed enclosure) to prevent VOC from escaping into the environment to be decontaminated.

In another embodiment, the containment box 36 may be a non-separable component from the housing 14 and, for example, have openings aligned with the air inlet 16 and the air outlet 22. In the purge mode, these openings in enclosure 36 are opened to ensure that the ambient gas flows through gas filtration device 10. In the sterilization mode, these openings of enclosure 36 are sealed so that enclosure 14 is within the enclosed cavity formed by enclosure 36, thereby preventing VOC from escaping into the environment to be decontaminated.

In an alternative embodiment, the housing 14 includes an air inlet 16 on opposite sides and an air outlet 20 on an upper surface. However, those skilled in the art will appreciate that the number and location of the air inlets and outlets on the housing are not limited by the embodiments of the present disclosure, but may be varied according to the actual application.

Fig. 4 shows a schematic structural block diagram of a gas filtering device 10 according to a third embodiment of the present disclosure. The same structural components in fig. 4 and 3 will not be described again, and only the differences therebetween will be described here.

As shown in fig. 4, the gas filtration device 10 may also include a VOC filter 38. As shown in fig. 4, a VOC filter 38 may be disposed between the blower 12 and the air outlet 22 for adsorbing VOCs in the gas. Alternatively, the VOC filter 38 may also be disposed on a side of the air outlet 22 away from the fan 12, for example, above the air outlet 22 and near the air outlet 22 of fig. 4. In this way, VOC released by heating of the screen can be prevented from escaping into the environment to be purified.

Fig. 5 shows a schematic structural block diagram of a gas filtering device 10 according to a fourth embodiment of the present disclosure. The same structural components in fig. 5 and 4 will not be described again, and only the differences therebetween will be described here.

As shown in fig. 5, the gas filtering device 10 may further include a pre-strainer 34, and the pre-strainer 34 may be disposed between the heating rack 20 and the gas inlet 16. In one embodiment, the pre-strainer 34 may be used to adsorb large sized particles. In one embodiment, pre-strainer 34 may be water washable. By using a low cost pre-strainer 34, the service life of the strainer 18 can be extended, thereby reducing the cost of use of the gas filtering device 10. By providing a pre-strainer 34 between the heating rack 20 and the air inlet 16, the housing of the air filtration device can be maintained below a safe temperature, preventing a user from being burned by the hot housing.

Through the embodiments of the present disclosure, the filter screen of the gas filtering apparatus can be easily sterilized and disinfected. In one embodiment, the sterilization process of the filter screen is not limited to before the filter screen is replaced, but may also be during the use of the filter screen. After the filter screen is heated for sterilization, the filter screen still has good purifying capacity in the service life.

It will be understood by those skilled in the art that the "heating wire" of the present disclosure is not intended to limit the geometry of the heating component to a wire, but that other geometries of heating elements are possible, such as, but not limited to, heating rods, heating strips, and the like.

Various embodiments and modifications have been described. Those skilled in the art will appreciate that certain features of these embodiments may be combined, and that other variations will readily occur to those skilled in the art. It is to be understood that the above detailed embodiments of the disclosure are merely illustrative of or explaining the principles of the disclosure and are not limiting of the disclosure. Therefore, any modification, equivalent replacement, and improvement, etc. should be included in the protection scope of the present invention without departing from the spirit and scope of the present invention. Also, it is intended that the appended claims cover all such changes and modifications that fall within the scope and range of equivalents of the claims.

Claims

1. A gas filtering device (10), characterized in that the gas filtering device (10) comprises:

a housing (14) having an air inlet (16) and an air outlet (22) disposed thereon;

a fan (12) disposed inside the housing (14) and configured to cause gas to flow into the housing (14) via the gas inlet (16) and out of the housing (14) via the gas outlet (22), wherein the rotational speed of the fan (12) is controllable in dependence on the operating mode in which the gas filtration device (10) is in use;

a screen (18) disposed between the air inlet (16) and the fan (12) to filter air flowing within the housing (14); and

a heating rack (20) disposed between the air inlet (16) and the filter screen (18) and fixing a heating wire (28), the heating wire (28) heating the gas flowing within the housing (14) in a state in which the gas filtering device (10) is in a sterilization mode.

2. The gas filtration device (10) according to claim 1, wherein the gas filtration device (10) further comprises:

a temperature sensor (24) configured to measure a temperature of the sieve (18), wherein at least one of a power and a heating time of the heating wire (28) is adjustable based on the measured temperature.

3. The gas filtering device (10) according to claim 1, characterized in that said heating rack (20) has the same dimensions as said filtering screen (18).

4. The gas filtering device (10) according to claim 1, characterized in that the heating wires (28) are evenly distributed on the heating rack (20).

5. The gas filtering device (10) according to claim 4, wherein the cross-sectional diameter of the heating wire (28) is in the range of 3mm to 3 cm.

6. The gas filtering device (10) according to claim 4, wherein a spacing between adjacent ones of the heating wires (28) is in a range of 0.5 to 10 times a cross-sectional diameter of the heating wires (28).

7. The gas filtration device (10) of claim 1, wherein the gas filtration device (10) further comprises a containment box (36) for containing the housing (14) within a containment chamber when the gas filtration device (10) is in the sterilization mode.

8. The gas filtration device (10) according to claim 1, wherein the gas filtration device (10) further comprises a volatile organic compound filter (38), the volatile organic compound filter (38) being arranged between the fan (12) and the air outlet (22) or on a side of the air outlet (22) remote from the fan (12) for adsorbing volatile organic compounds in the gas.

9. The gas filtration device (10) of claim 1, wherein the gas filtration device (10) further comprises an indicator configured to present an indication that the gas filtration device (10) is in the sterilization and disinfection mode.

10. The gas filtering device (10) according to claim 1, wherein the gas filtering device (10) further comprises a short-circuit protection element for preventing the heating wire (28) from being short-circuited.

11. The gas filtering device (10) according to claim 1, wherein the screen (18) is a high efficiency air filter.

12. The gas filtering device (10) according to claim 11, wherein the gas filtering device (10) further comprises a pre-strainer (34), the pre-strainer (34) being disposed between the heating rack (20) and the air inlet (16).