KR102506162B1 - Air treatment system - Google Patents

Abstract

An air handling system having an improved control system is disclosed. The control system may include a dynamic "dead front" display that changes the display based on the operating mode. The display includes a capacitive touch sensor and may include an array of capacitive film segments or traces integrated within the display. The control system may include self-contained electronic modules that can be tested and calibrated prior to installation within the ATS. The dust sensor assembly may be integrated into the electronics module. The front cover may be attached by mechanical attachment at the top and magnetic attachment at the bottom. The ATS may include a filter retainer assembly having a rotating clip configured to perform in a cam-like manner to firmly clamp the particulate filter and the carbon filter in place.

Description

Air treatment system {AIR TREATMENT SYSTEM}

The present invention relates to air treatment systems, and more particularly to portable room air filtering systems.

Air treatment systems continue to grow in popularity as concerns about air quality remain a matter of considerable interest. This increase is driving an increase in the use of commercial and residential air treatment systems. Conventional home air treatment systems are self-contained units that can be placed in rooms in which it is desired to treat air. Home air treatment systems generally work by drawing room air into the system, treating the air with one (or more) techniques, and exhausting the treated air back into the room. The treated air contains lower concentrations of airborne contaminants than in the room as a whole. The treated air mixes with the room air, thus reducing the concentration of contaminants in the room air.

Air treatment systems are available with different types of control systems. The control system provides different methodologies for controlling the operation of the air handling system and for accepting operator input. The design and configuration of the control system can have a significant impact on the functionality and aesthetic appeal of an air handling system.

Many conventional air treatment systems include a series of specialized filters adapted to address specific air quality problems. For example, domestic air treatment systems often include prefilters, particulate filters and odor filters. The function of the pre-filter is typically to remove relatively large elements from the air such as hair and clumps of dust. Particulate filters typically function to remove smaller airborne particles. Particulate filters are available in a variety of configurations. For example, a particulate filter may include a pleated material with nonwoven fibers that trap particles and are effective as HEPA filters. Odor filters are also available in a variety of types and configurations. Many odor filters include activated carbon that adsorbs a wide range of impurities, including but not limited to a number of organic chemicals. Conventional particulate filters and carbon filters have a limited life and require frequent replacement. The structure of the air treatment system and the mechanism used to secure the filter within the air treatment system can have a significant impact on the effectiveness of the system and can significantly affect the amount and complexity of effort required to replace the filter.

There are other aspects that may affect the functionality and commercial success of an air treatment system. For example, convenience features such as power cord management, and mobility features such as feet and handles can affect the user experience.

The present invention provides an air treatment system having an improved control system. In one embodiment, the control system includes a “dead front” display that provides the ATS with a clean and simple look and facilitates an improved control experience. The display may include a plurality of information display elements and a plurality of touch sensors that are selectively illuminated by an array of underlying light sources, such as LEDs. To create the desired graphics, each light source may be covered by a screen with a shielding layer and a diffuser layer. A translucent cover may be placed over the control system to conceal underlying structures and make the graphic image visible only when illuminated. The translucent cover may be integrated into a removable front cover that closes the front of the ATS. In one embodiment, the electronic module includes a light duct assembly having a plurality of individual ducts connected side-by-side to guide light from a light source to a corresponding display element.

In one embodiment, the touch sensor is a capacitive sensor. In such an embodiment, a capacitive film such as a transparent PET film coated with indium tin oxide may be incorporated into the structure over each light source. For example, each light source may be covered by a laminated screen comprising a shielding layer and a diffusion layer, and a capacitive film may be implemented as an additional layer of the screen. As another example, the capacitive film may be separated from the screen, and may be placed on top or bottom of the screen, where it is possible to sense the presence of an operator's finger. In an alternative embodiment, conductive traces may be incorporated into the structure above each light source to function as capacitive sensors. For example, a printed circuit board ("PCB") may be placed over the light duct array. The PCB may form an opening over each individual light duct and may include traces around each opening associated with the light duct for the input display elements. The PCB may also include relatively large conductive traces that extend over a substantial portion of the surface of the PCB to provide a capacitive sensor sensitive enough to function as a proximity sensor. A proximity sensor may be configured to sense the presence of an operator (eg, operator's hand) within approximately two feet of the display.

In one embodiment, the ATS has a removable front cover over the display, and the control system is configured to recognize touch differently depending on whether the cover is installed or removed. This allows the user to control the system whether the cover is in place or not. In one embodiment, the control system is configured to enable a different set of control options depending on whether or not a cover is installed. For example, the control system may provide a reduced set of control options and/or additional control options when the cover is removed. The control system may recognize whether a cover is installed or removed using one or more of the capacitive touch sensors, such as a proximity sensor.

In one embodiment, the control system includes a dust sensor integrated into the electronics module. The dust sensor may be arranged so that air is drawn into the dust sensor by the partial vacuum created by the ATS blower. After passing through the dust sensor, the air is passed through a filter and returned to the room in a treated state. Alternatively, the dust sensor may be arranged so that air is drawn into the dust sensor by the flow of treated air expelled by the ATS.

In another aspect, the present invention provides a front cover with magnetic interlocks that allow for easy installation and removal, as well as allowing the control system to recognize whether the cover is installed. In one embodiment, the front cover includes one or more mechanical attachment points on the top and one or more magnetic attachment points on the bottom. The mechanical attachment point may include a lip configured to engage a mating structure within the ATS housing. For example, a lip may be hung on the electronic module to help ensure a true fit between the front cover and the electronic module. The size, shape and configuration of the hooking portion may vary. For example, the catch may generally extend across the width of the front cover or may extend only across the central portion of the front cover. As another example, the lip may be integrally formed with the front cover or may be a separate component attached to the front cover after manufacture. The front cover may be made from a translucent plastic configured to provide the appearance of opacity, while allowing light from the display to shine through. In one embodiment, the exposed surface of the front cover may be covered with a film applied using an in-mold film process. In other embodiments, the exposed surface may be covered with a thin layer of paint using a spray process or direct transfer process (ie, silk screen or pad printing, or thermal film transfer). Alternatively, the front cover may be generally opaque and may include a window overlying the display. The window may be made from translucent plastic configured to provide the appearance of opaqueness, while allowing light from the display to shine through. In one embodiment, the exposed surface of the window may be covered with a film applied using an in-mold film process. In other embodiments, the exposed surface of the window may be covered with a thin layer of paint using a spray process or direct transfer process (ie, silk screen or pad printing, or thermal film transfer).

In another aspect, the present invention provides an ATS housing having interchangeable bases. Although the number and style of bases may vary, in one embodiment the ATS may include multiple bases providing different structures for accommodating electrical cords and/or different feet for supporting the ATS. In the context of an electrical cord, an ATS may be capable of receiving a base having a structure for manually winding the electrical cord or a retractable cord assembly having an automatic take-up reel. Regarding the foot, the base may include a fixed foot, casters, wheels and/or a single elongated roller. As an alternative to an interchangeable base, the base may be integrated into the ATS and may include a foot and a single elongated roller. The ATS may include a handle on the upper back of the housing. In one embodiment, the handle may extend essentially the entire width of the ATS, thereby allowing the ATS to be gripped with one hand in the center or two hands toward the sides.

In another aspect, the present invention provides a filter retainer assembly that provides easy and secure installation of a filter. In this embodiment, the ATS includes a particulate filter and an activated carbon filter. An activated carbon filter is first fitted into the filter housing, and a particulate filter is fitted into the filter housing over the carbon filter. The particulate filter is secured to the ATS housing at its periphery by one or more clips that interact with corresponding structures within the ATS. The clip or clips may be configured to perform in a cam-like manner to firmly clamp the particulate filter and carbon filter in place. The ATS may also include a pre-filter snap-fit onto the particulate filter. The pre-filter may include coarse filter media supported by a grid-like pre-filter retainer.

The present invention provides an ATS with an improved control system. The use of self-contained electronic modules allows testing and calibration of the electronics prior to installation and assembly of the ATS. This also facilitates replacement of the electronic module, if necessary. For example, the use of an on-board dust sensor with integral ducting eliminates the need to separately install the dust sensor and wired the dust sensor to the electronics module. The control system includes a "dead front" display with an integral capacitive touch sensor. This allows a completely sealed electronic module with no moving parts, providing increased reliability. The use of a "dead front" display allows for a variety of dynamic displays per mode, not only providing improved aesthetics, but also simplifying the display to facilitate easy operation from one mode to another. The use of LEDs with multiple color or brightness options allows display elements to be illuminated in different configurations depending on use. Wireless connectivity allows control and data exchange with remote devices, such as smartphones and tablets, without the need for light of sight or infrared transmissive plastics, including data logging and monitoring of historical trends. RFID tags may provide improved tracking of filter life and product efficacy, and may allow filter life reset without operator intervention. A dust sensor not only controls blower speed, but can also be used to provide a more accurate filter life calculation. In another aspect, the ATS includes a front panel that can be easily removed and installed with one hand, without having to bend deeply or kneel to reach an attachment point. By having at least partially translucent or partially translucent windows, the front cover can cover the electronic module to provide a "dead front" display. Also, the side inlet and the central inlet allow air to freely enter the ATS. In another aspect, the provision of interchangeable bases allows the ATS to be easily tailored for different applications and for consumers with different preferences. This provides more flexibility and quick switching between models with different characteristics. For example, the types of feet can vary, and the types of code management features can vary. The use of a single-piece handle that extends approximately the width of the ATS provides several benefits. This allows the operator to operate the ATS with one or both hands at multiple wrist/hand angles. It can also be formed to provide structural reinforcement under the cantilevered features of the ATS. In one embodiment, the base may include a caster or center roller that allows the ATS to be moved easily with one hand engaged in the center of the handle. In another aspect, the present invention provides a simple and effective clip device for securing a particulate filter to an ATS. By positioning the clip or clips toward the top of the filter and the catch toward the bottom, the filter can be secured or released without deep bending or kneeling. The clip or clips may provide improved sealing by automatically pulling the filter into closer engagement with the sealing surface as they engage. The clip or clips also only work in one direction, thereby ensuring that the filter is installed in the correct orientation.

These and other objects, advantages, and features of the present invention may be more fully understood and appreciated by reference to the description of the present embodiments and drawings.

Before describing the embodiments of the present invention in detail, it should be understood that the present invention is not limited to the details of construction and arrangement of components or to the details of operation described in the following detailed description or shown in the drawings. The invention may be embodied in various other embodiments and may be practiced or carried out in alternative ways not expressly disclosed herein. Also, it should be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. Use of "comprising" and "comprising" and variations thereof is intended to include the hereinafter enumerated items and equivalents thereof as well as additional items and equivalents thereof. Enumerations may also be used to describe various embodiments. Unless expressly stated otherwise, the use of enumerations should not be construed as limiting the invention to any particular order or number of elements. Also, the use of a recitation should not be construed as excluding from the scope of the invention any additional steps or components that may be combined with or into the recited steps or components. Any reference to a claim element as "at least one of X, Y, and Z" refers to any one of X, Y, or Z individually, and any combination of X, Y, and Z, for example, X, Y, Z ; X, Y; X, Z; and Y, Z.

1A is a front perspective view of an ATS according to an embodiment of the present invention.
1B is a rear perspective view of the ATS.
2 is an exploded perspective view of the ATS showing the front cover and filter removed from the ATS.
FIG. 3 is a cross-sectional view of the ATS taken along line 3-3 in FIG. 1;
4 is a schematic diagram of an electronic module.
5 is a front view of the electronic module.
6 is a perspective view of the electronic module with the cover removed.
7 is an exploded perspective view of an electronic module.
8 is a perspective view of a portion of an ATS showing a “dead front” display with no elements illuminated.
9A is a front view of the display outlining all display elements.
9B is a front view of the display showing all display elements illuminated in an “on” state.
10 is a perspective view of a portion of an ATS showing a “dead front” display showing various elements illuminated in different states.
11 is a front view of the display when powered off.
12 is a front view of the display when in night mode.
13 is a schematic diagram of a control scheme according to an embodiment of the present invention;
14 is a schematic diagram of an alternative control scheme.
15 is a schematic diagram of a second alternative control scheme.
16 is a front perspective view of the ATS showing the air inlet.
17A and 17B are diagrams illustrating an alternative method for removing the front cover.
18 is a rear perspective view of the front cover;
19A and 19B are cross-sectional views showing an upper attachment point between a front cover and an ATS.
20A and 20B are cross-sectional views showing the lower attachment point between the front cover and the ATS.
21 is a partially exploded front perspective view showing an ATS and three interchangeable bases;
22 is a partially exploded rear perspective view showing the ATS and three interchangeable bases.
23 is a bottom perspective view showing a base with fixed feet;
24 is a bottom perspective view showing a base with casters;
25 is a bottom perspective view showing a base with fixed feet and rollers;
26 is a perspective view of a handle and a portion of the ATS that includes the handle.
27 is a perspective view of the ATS with the front cover and pre-filter removed.
28A-28D are various diagrams illustrating various stages of removal of a particulate filter.
29A is a perspective view of a particulate filter.
29B is a side elevational view of a particulate filter.
30A to 30D are a series of diagrams representing the operation of a filter latch according to an embodiment of the present invention.
31A-31D are a series of diagrams representing the operation of a filter latch according to an alternative embodiment.
32A-32D are a series of diagrams representing the operation of a filter latch according to a second alternative embodiment.
33A is a front perspective view of an ATS according to an alternative embodiment of the present invention.
33B is a rear perspective view of an alternative ATS.
34 is an exploded perspective view of an alternative ATS showing the front cover and filter removed.
FIG. 35 is a cross-sectional view of an alternative ATS taken along line 35-35 of FIG. 33A.
36 is a schematic diagram of an electronic module of an alternative ATS.
37 is a perspective view of an alternative ATS display assembly.
38 is a partially exploded perspective view of the display assembly of an alternative ATS.
39 is an exploded perspective view of the electronic module.
40 is a perspective view of an alternative ATS showing a “dead front” display with no elements illuminated.
41 is a perspective view of an alternative ATS showing a “dead front” display with all display elements outlined.
42 is a top perspective view of an alternative ATS showing a “dead front” display with all display elements outlined.
Fig. 43 is a schematic diagram of a control scheme according to an alternative embodiment;
44 is a front perspective view of an alternative ATS showing air inlets;
45A and 45B are diagrams illustrating an alternative method for removing the front cover of an alternative ATS.
46A is a rear perspective view of the front cover.
46B is an exploded perspective view of the front cover.
47 is a partial cross-sectional view of the lower portion of an alternative ATS.
48A is a perspective view of an attachment plate.
48B is a plan view of the attachment plate.
49 is an exploded perspective view of a portion of the filter housing and a portion of the upper housing;
50 is a perspective view of the ATS with the front cover and pre-filter removed.
51A is a perspective view of a particulate filter.
51B is a front view of a particulate filter.
51C is a side elevational view of a particulate filter.
51D is a plan view of a particulate filter.
52A-52D are various diagrams illustrating different stages of removal of a particulate filter.
53A-53D are a series of diagrams representing the operation of an alternative filter latch.

A. Overview

An air handling system (“ATS”) according to an embodiment of the present invention is shown in FIG. 1 . In the illustrated embodiment, the ATS 10 generally includes a prefilter 100, a particulate filter 102 and an activated carbon filter 104. The ATS 10 also includes a blower 56 for drawing air into the ATS 10 from the environment, moving the air through the filter and returning the filtered air to the environment.

The ATS 10 of the illustrated embodiment includes a control system 12 having an electronics module 14 providing a "dead front" display 16. The display 16 of this embodiment includes a plurality of display elements 18 that can be selectively illuminated by the control system 12 to provide dynamic content. Some of the display elements 18 may include a touch sensor 20 that accepts operator input. In this embodiment, the electronic module 14 includes a plurality of light sources 22, such as LEDs, each uniquely assigned to a display element 18. Each light source 22 may be covered by a screen 24 having a shielding layer 26 and a diffuser layer 28 . Each touch sensor 20 may also include a capacitive film 30 positioned over a light source 22 . In this embodiment, a "dead front" appearance may be created by the translucent front cover 32 which conceals the underlying structure and makes the display element 18 visible only when illuminated.

In another aspect, the front cover 32 is secured to the ATS 10 housing 34 using a combination of mechanical and magnetic attachment points. The mechanical attachment points of the illustrated embodiment include a lip 36 on top of the front cover 32 and a pair of magnets 90 on the bottom of the front cover 32 . Lip 36 is configured to latch onto a corresponding structure within ATS housing 110 . In use, the combination of mechanical and magnetic attachment points allows the front cover 32 to be easily removed and installed by an operator in a standing position.

In another aspect, the ATS 10 is capable of receiving one of a plurality of interchangeable bases 40 . Different bases 40 may provide different structures for receiving power cords 42 and/or different structures for supporting ATS 10 . In FIG. 10 , ATS 10 includes a base 40 having a bobbin 44 and fixed feet 46 for manually winding a power cord 42 . Alternative bases 40', 40" may also include a self-take-up reel and/or cord retrieval assembly with wheels, casters or rollers (see, eg, FIG. 25). The ATS 10 may include an ATS 10 ) may also include a one-piece handle 48 that extends essentially the entire width of the ATS 10 to allow it to be gripped with one hand in the center or with two hands toward the sides. ") includes a cord retrieval assembly 45" and a single centrally located roller 47". This alternative base allows the ATS 10 to tilt forward on rollers 47" and roll using handles 48 from one position to another.

In another aspect, the ATS 10 includes a filter retainer assembly 50 that facilitates quick and secure installation and removal of the filter(s). The filter retainer assembly 50 of the illustrated embodiment includes a plurality of catches 52 and a catch portion 52 disposed over the particulate filter and interacting with structures on the ATS housing 110 to secure the particulate filter in place within the filter housing 112. Includes clip 54. The clip 54 may function in a cam-like manner to draw the particulate filter into the filter housing 112 to facilitate an airtight seal.

Directional terms such as "vertical", "horizontal", "above", "below", "top", "lower", "inside", "inward", "outside" and "outward" refer to the embodiments shown in the drawings. It is used to help explain the invention on the basis of orientation. The use of the term orientation should not be construed to limit the invention to any particular orientation(s).

B. General configuration

As noted above, the present invention is described in the context of a room air treatment system that performs its general function by operating blower 56 to move air through a series of filters 100, 102, 104. The air treatment system 10 of the illustrated embodiment is configured to treat air in three filtration stages. The first stage is a coarse screen pre-filter 100 intended to remove large contaminants such as hair, lint fibers and large clumps of dust (eg "dust-bunnies"). The second filtration stage is a particulate filter 102 . Although particulate filter 102 specifications may vary, the illustrated ATS 10 includes a pleated HEPA filter media that reduces airborne particles on the order of 0.009 microns. The third filtration stage is an activated carbon filter 104 comprising a bed of particulate activated carbon chips coated with various catalysts that adsorb and convert molecular contaminants such as formaldehyde, dioxins and ozone. The carbon filter 104 is entitled "AIR TREATMENT FILTER AND RELATED METHOD" issued to Taylor, Jr., et al., on January 8, 2008 and incorporated herein by reference in its entirety. METHOD)" US Pat. No. 7,316,732.

In the illustrated embodiment, various filters 100 , 102 , 104 fit within filter housing 112 . Filter housing 112 generally includes a carbon filter seat and a particulate filter seat. The two pedestals are generally rectangular voids configured to receive a carbon filter and a particulate filter, respectively. The carbon filter seat is slightly smaller in height and width than the particulate filter seat. As a result, the filter housing 112 is stepped with a shoulder 114 surrounding the carbon filter seat. The carbon filter 104 is first fitted into the filter housing 112 . The outer dimensions of the carbon filter 104 are slightly smaller than the dimensions of the portion of the filter housing 112 intended to receive the carbon filter 104 . As a result, there is a relatively tight fit between the carbon filter 104 and the filter housing 112, which is intended to move air through the carbon filter 104 rather than around it. The particulate filter 102 is then fitted within the filter housing 112 . As described above, the filter housing 112 is stepped and includes a shoulder 114 on which the particulate filter 102 is mounted. The particulate filter 102 may include a face seal (not shown) that engages the shoulder 114 to provide a leaktight seal between the particulate filter 102 and the filter housing 112 . This forces any air moving through the ATS 10 to flow through the particulate filter 102 rather than around it. Finally, the pre-filter 100 fits into the filter housing 112 outside the particulate filter 102. In this embodiment, the pre-filter 100 includes a frame 116 and a layer of filter media (not shown). Frame 116 is configured to snap directly onto particulate filter 102 . For example, frame 116 may include fingers 117 that extend inwardly and are capable of engaging the particulate filter frame. Except to the extent described, prefilter 100, particulate filter 102 and carbon filter 104 are generally conventional and will therefore not be described in detail. Although the illustrated embodiment includes a three-stage filter arrangement, the present invention may be incorporated into an ATS with a different filtering/processing arrangement.

In this embodiment, the ATS 10 includes a front untreated air inlet 106a - 106c to allow air to enter the system and a rear air outlet 108 to return the treated air to the environment. The ATS 10 includes a blower 56 housed in the lower rear portion of the housing behind the pre-filter 100, the particulate filter 102 and the carbon filter 104. In operation, the blower 56 draws untreated air from the environment into the ATS 10 through inlets 106a - 106c and passes the air continuously through three filters 100, 102, 104 to treat the air. , and then discharges the treated air through outlet 108 to return it to the environment. The size, shape and configuration of the inlet, outlet and internal flow passages are designed, among other things, to give the ATS a compact footprint while still providing quiet and efficient operation. The size, shape, and configuration of the inlet, outlet, and internal flow path may vary from application to application as desired.

The illustrated ATS 10 is merely an example, and the size, shape, and configuration of the ATS may vary from application to application.

C. Control system

As described above, the present invention includes a control system 12 that controls the operation of the ATS 10 and provides a user interface for displaying information and receiving input from an operator. The primary functions of control system 12 are to control the rate at which ATS 10 operates to process air based on sensed parameters or operator input, track filter usage, set mode, motor speed, and filter life. to notify the operator and accept the operator's command. In general, control system 12 changes the rate at which air is filtered by adjusting the speed of blower 56 . More specifically, control system 12 controls the operation of blower 56 based on an automatic or manual control scheme, as described in more detail below. Control subsystem 60 may be configured to transition slowly between blower speeds, as desired. For example, in the illustrated embodiment, blower speed control is achieved by varying the duty cycle of the electrical power supplied to blower 56 . To provide slow transitions between motor speeds, control subsystem 60 may transition from one speed to another by slowly incrementing or decrementing the duty cycle to move from the current speed to the desired speed. . The timing, number and size of the steps may vary from application to application depending on the desired effect.

In the illustrated embodiment, the user interface is implemented as a “dead front” display 16 positioned towards the top of the front cover 32 and containing an integral touch sensor. In use, display 16 displays information and receives operator input related to operation and maintenance of the system. For example, the control system 12 of the illustrated embodiment displays information regarding the current environmental dust level and the remaining life of the various filters. It also provides touch sensitive buttons that allow the operator to control the system. The “dead front” display 16 includes a plurality of display elements 18 that are visible only when illuminated. Control system 12 is configured to selectively illuminate individual display elements 18 to provide a dynamic display that changes to provide information and present available control options at any given time. In the illustrated embodiment, the display 16 includes an information display element 18a that is illuminated to provide information regarding the status of the ATS or monitored characteristics such as environmental air quality and filter life, and allows the operator to control system 12. and an input display element 18b incorporating a touch sensor for providing input. In addition to accepting user input, input display element 18b may also provide information regarding the status of the ATS, such as operating mode and blower speed.

In the illustrated embodiment, control system 12 controls all electronic components of ATS 10, except for power supply components that convert AC wall power to DC power required to operate ATS 10. and an electronic module 14 that is self-contained in that it contains. In this embodiment, power supply components (not shown) are located within base 40 of ATS housing 110 . Referring now to the schematic diagram of FIG. 4 , the electronics module 14 generally includes a control subsystem 60, an LED array 62, a capacitive touch sensor array 64, a dust sensor assembly 66, an RFID subsystem ( 68) and a wireless communication subsystem 70. Control subsystem 60 coordinates the collection of data from various other subsystems, including capacitive touch sensor array 64, dust sensor 66, RFID subsystem 68, and radio communication subsystem 70. and control circuitry and firmware configured to operate the ATS 10. The various modes of operation of the system are described in more detail below. Control subsystem 60 controls pre-programmed operational defaults as well as historical behavior such as age of filters 100, 102, 104, hours of use, counters, and other variables that may be used in connection with the operation of ATS 10. It also includes non-volatile memory for storage of data.

The electronic module 14 of the illustrated embodiment is shown in FIGS. 5-7. As shown, electronics module 14 includes control subsystem 60, RFID subsystem 68 and wireless communication subsystem 70, as well as LED array 62, capacitive touch sensor array 64 and and a housing 148 housing the circuitry for the dust sensor assembly 66. Housing 148 generally includes base 150 and cover 152 . As described above, LED array 62 is configured to provide illumination of display element 18 . More specifically, one or more LEDs 62a are positioned behind each display element 18, including information display element 18a and input display element 18b. LED 62a may be selectively illuminated by control subsystem 60 when appropriate to either display information display element 18 or make input display element 18b available for input. Each LED 62a may include a single LED or multiple LEDs providing a variety of lighting options. For example, each LED 62a may include a plurality of LEDs of different brightness to allow the brightness of display element 18 to be varied. As another example, each LED 62 may include different color LEDs that can be illuminated individually or in combination to create different color lighting. In one embodiment, each LED 62 includes a red LED, a green LED, and a blue LED that can be illuminated in different combinations and at different levels of brightness to provide illumination of essentially any desired color. In another example, each LED 62a may include multiple LEDs of different brightness and different colors. Although the illustrated embodiment includes an LED array 62 for providing illumination to the display 16, the LED array 62 may be replaced or supplemented with other types of light sources, such as OLED, laser and EL light sources. .

In the illustrated embodiment, display 16 is a “dead front” display in which non-illuminated display elements 18 are not visible. In this embodiment, the area where the display 16 is located appears to be a simple continuation of the ATS housing 110, and when no display elements 16 are illuminated, the ATS 10 does not have a user interface. see. To create the desired graphical elements, each display element 16 includes a screen 74 that shields and diffuses the light produced by the underlying LEDs 62. In the illustrated embodiment, display 16 includes two screens 74a and 74b, each covering a plurality of LEDs and providing shielding and diffusing functions for a plurality of display elements 18. A screen 74a is provided in conjunction with an information display element 18a providing information relating to the life of the various filters 100, 102 and 104. Screen 74b includes an information display element 18a that provides information relating to environmental air quality (e.g., based on dust sensor readings) and an input display element 18b associated with power, mode, and blower speed inputs. ) is associated with In the illustrated embodiment, each screen 74 is a laminated structure that generally includes a diffusion layer and a shielding layer. The diffusion layer may be essentially any material capable of diffusing the light produced by the LED. For example, the diffusion layer may include a transparent substrate coated with a translucent film or other translucent coating. Alternatively, the diffusion layer may be a transparent material having a “roughed” or otherwise textured surface. In another alternative, the diffusion layer may be a sheet of translucent material. The shielding layer may be essentially any material capable of blocking light to create the desired graphics, including various opaque and translucent materials, such as inks, paints, films, and other adhesive layers. For example, the shielding layer may be a layer of opaque film that forms opening(s) in the shape of a desired graphic. It may also include combinations of different materials to provide different visual appearances. For example, the shielding layer may include an opaque region where no light transmission is desired, a first translucent material where background light transmission is desired, and a second translucent material where foreground light transmission is desired. The first and second translucent materials may create different looking regions through the use of translucent materials of different colors or translucent materials having different levels of transparency. The shielding layer may be applied to the diffusion layer by printing, thermal bonding, adhesive or other suitable means. In the illustrated embodiment, the shielding layer is disposed on the outer surface of the diffusion layer facing the LED or other light source, but may be located in other locations if desired. Although the diffusion layer and shielding layer are part of a single stacked construction in the illustrated embodiment, they may alternatively be separate components. For example, these layers may be fabricated separately and placed adjacent to each other during assembly of display 16 .

In the illustrated embodiment, the light duct array 72 has a plurality of individual ducts 72a connected side by side to receive light from a light source and direct it to corresponding display elements. Each light duct 72a provides a reflective duct that surrounds the light source and transmits light from the light source 62a to the appropriate portion of the screens 74a and 74b. For example, as shown in FIG. 3 , one end of each light duct 72a may be configured to fit snugly over an LED 62a, while the other end is coupled to and associated with a screen 74b. It may be dimensioned and shaped to follow the periphery of the display element 18 . The inner surface of each light duct 72a may be reflective, diffusive, or have other optical properties selected to provide a desired visual appearance to the corresponding display element 18 . In the illustrated embodiment, the electronic module 14 includes two light duct arrays 72 - one for filter life indication and the other for the remaining display elements. In this embodiment, each light duct array 72 is manufactured as a single integral unit, thereby facilitating manufacturing and assembly of the electronic module 14 . For example, each light duct array 72 may be injection molded, and the inner surface may be coated with a reflective or diffusive material depending on the desired appearance.

As discussed above, part of display element 18 is input display element 18b, which functions as a touch sensor that allows an operator to provide input to control subsystem 60. Input display element 18b may be implemented using essentially any touch sensor technology that can be incorporated into a “dead front” display. In the illustrated embodiment, input display element 18b is a capacitive touch sensor. In this embodiment, display 16 includes a capacitive touch sensor array 64 comprising a plurality of discrete segments of capacitive film 64 . Each segment of film is associated with a single touch sensor. For example, each segment of film may coexist with the display element 18b associated with its touch sensor. Capacitive film 64 may be integrated into screens 74a and 74b as a separate layer laminated to diffusion layer 76 and/or shielding layer 78, for example. Alternatively, the capacitive film 64 may be separated from the screens 74a and 74b. In the illustrated embodiment, each segment of capacitive film 64 includes a tab 65 or other feature for connection to electronic module 14, and the underlying substrate 67 provides a common ground plane. do. The monitoring, control and operation of a capacitive touch sensor may be generally conventional and thus will not be described in detail. Suffice it to say that the control subsystem 60 may recognize a touch by sequentially taking readings from individual segments of the capacitive film and determining that a touch has occurred when these current readings match predetermined values typical of a touch.

As noted above, the electronics module 14 of the illustrated embodiment includes a dust sensor assembly 66 that allows the control system 12 to determine the level of airborne contaminants. In this embodiment, dust sensor assembly 66 includes dust sensor 80 , sensor inlet 82 , sensor duct 84 , sensor outlet 86 and a pair of sensor gaskets 88 . In this embodiment, dust sensor assembly 66 uses a partial vacuum created by blower 56 to draw environmental air through dust sensor 80 . After passing through sensor 80, the air is treated and returned to the environment. As shown, the sensor outlet 86 communicates with the air flow path through the ATS 10 and is located upstream from the filters 100, 102, and 104. The sensor 80 is mounted on the electronics module 14 in proper alignment with the sensor outlet 86. The sensor inlet 82 is disposed within the cover 152 of the electronic module 14 to provide a passage for environmental air to enter the sensor duct 84. Sensor inlet 82 may also include a filter material (not shown) selected to prevent large particles such as hair, lint, and clumps of dirt from fouling dust sensor 80 . The filter material may be replaceable or washable. A sensor duct 84 is disposed between the sensor 80 and the sensor inlet 82 to provide a flow path to the sensor 80 . A sensor gasket (88) is positioned between the dust sensor (80) and the sensor outlet (86) and between the dust sensor (80) and the sensor duct (84). In operation, blower 56 draws air from the environment sequentially through sensor inlet 82, sensor duct 84, dust sensor 80, and sensor outlet 86. As the air passes through the dust sensor 80, the level of dust in the air is measured using known techniques and devices.

Although not shown, ATS 10 may also include a sensor capable of providing a reading indicating the presence or absence of front cover 32 . For example, in the illustrated embodiment, the ATS 10 includes a hall-effect sensor positioned towards the bottom of the ATS 10 near one of the magnetic attachment points. When the front cover 32 is removed, the absence of magnets will change the reading provided by the Hall effect sensor. Alternatively, individual interlocking magnets (not shown) may be incorporated within the front cover 32 at a location proximate the electronics module 14, such as a Hall effect sensor, reed switch, installed on the electronics module 14. ) or other magnetic field sensors can be used to determine the presence or absence of the front cover 32 . Information about the state of the front cover 32 can be used by the control subsystem 60 to affect the operation of the system. For example, in one embodiment, control subsystem 60 may automatically stop or otherwise change function of blower 56 when front cover 32 is removed. As another example, when front cover 32 is removed, control subsystem 60 may change a parameter used to determine whether a touch has occurred. This will allow the touch sensor to work equally well with and without the front cover 32 in place. As another example, control subsystem 60 may enter an alternate mode of operation when front cover 32 is removed. This may cause control subsystem 60 to change display elements 18, including available input display elements 18b.

Control system 12 also includes an RFID subsystem 68 configured to operate with a corresponding RFID tag within a replaceable filter within ATS 10 (e.g., particulate filter 102 and/or activated carbon filter 104). may also include The RFID subsystem 68 is generally conventional and will therefore not be described in detail. With the RFID subsystem 68, the control subsystem 60 determines filter life, usage time, elapsed time since installation, total effective consumption (e.g., motor speed multiplied by usage time), and other data may be collected, accumulated, and otherwise stored within the RFID tag. When a filter is installed, the RFID reader/writer can read any data pre-stored in the RFID tag, such as the filter life, the total time the filter has been installed in any system, and the total operational consumption of the filter life. In this way, the system is able to provide proper tracking even when the filter moves from one ATS to another. The RFID tag embedded in the filter may also contain a serial number that can be used to ensure the authenticity of the filter. For example, control system 12 may store a table of valid serial numbers against which serial numbers should be compared, or if it has a network capability, it may have the ability to compare serial numbers against a table of valid numbers stored on the Internet. may be Filter usage information may be used to provide an indication of remaining filter life and provide a prompt when filter replacement is required. The RFID subsystem 68 may also be used to determine when a filter has been removed. This information may be useful for controlling or maintaining statistics relating to the use of the ATS 10. For example, control subsystem 60 may be configured to stop the blower when particulate filter 102 and/or carbon filter 104 are removed. As another example, control subsystem 60 may enter service mode when one or both filters are removed. When in service mode, control subsystem 60 displays technical information and/or provides control options specific to that mode. To help ensure proper alignment between the RFID reader/writer in the ATS 10 and the RFID tag in the carbon filter 104, the carbon filter 104 and filter housing 112 are designed so that the carbon filter 104 is only aligned. A keyway may be installed so that it can be installed only in the orientation provided. For example, the bottom of the particulate filter 104 may include a keyway (not shown) and the filter housing 112 may include a corresponding key (not shown). When the RFID reader/writer is centered in the left-right direction, the key may be centered as it will not matter if the filter surface faces inward. It may be advantageous to provide an asymmetric key arrangement to ensure that the desired filter surface faces inward when the RFID reader/writer is not centered.

As described above, control system 12 is a wireless communication subsystem (which allows the control subsystem to communicate wirelessly with other electronic devices, such as smartphones, tablets, personal computers, local wireless routers, broadband wireless routers, and other communication devices). 70) may be included. In the illustrated embodiment, wireless communications subsystem 70 allows ATS 10 to exchange information with and receive commands from remote devices, such as smart phones or tablet devices running dedicated applications. For example, an application may be provided that allows an operator to input ATS commands on an electronic device that are wirelessly communicated to and performed by control subsystem 60 . As another example, information collected by the ATS 10 may be communicated to an electronic device for display within an application. In the illustrated embodiment, this information may include filter life information for each filter, operating mode information, motor speed information, and environmental air quality information derived using a dust sensor. Wireless communication subsystem 70 may utilize essentially any wireless communication technology and protocol. For example, in the illustrated embodiment, wireless communications subsystem 70 may have Bluetooth and/or Wi-Fi capabilities.

Control system 12 may be configured to implement a wide range of control schemes. In each case, the control system 12 is configured to provide a dynamic display 16 in which the display elements 18 are illuminated and the touch sensors are enabled based on changing variables such as the operating mode and values of monitored parameters. may be configured. In the illustrated embodiment, control system 12 has a “smart” mode (or automatic mode) in which control is automated based at least in part on dust sensor readings, a “manual” mode in which an operator controls blower speed, and a blower ( 56) implements the control scheme with four general modes of operation, including a "turbo" mode in which the display 16 is operated at high speed temporarily and a "night" mode in which the display 16 is operated differently to limit night vision illumination. Concerning this control scheme, the display 16 is capable of displaying various information display elements 18a and input display elements 18b (see Figs. 5 and 9a). In the illustrated embodiment, each display element 18 includes two LEDs of different colors and/or different intensities. One of the two LEDs is used to illuminate the display element in a “present” state (eg, a first color such as a dimmed LED or a more muted color). This lighting state is used to make display element 18 visible on display 16, providing a visual indication that it is not selected or active. Another LED is used to illuminate the display element in the “on” state (eg, a second color such as a brighter LED or a more vivid color). The "on" state is used to indicate that a display element is "on" or "active". The number, type, arrangement, configuration and operation of display elements 18 may vary from application to application, depending in large part on the control scheme implemented by control system 12 .

In the illustrated embodiment, the information display elements 18a include an information display element 200 representing pre-filter life, a set of information display elements 202 representing a specific filter life, and an information display element representing carbon filter life. 204 and a set of information display elements 206 representing environmental dust levels (see Fig. 9b). Input display element 18b generally includes power input display element 208, "smart" mode input display element 210, "turbo" mode input display element 212, "night" mode input display element 214, and A plurality of blower speed input display elements 216 (see FIG. 9B).

In the illustrated embodiment, the various filter life displays 200, 202, 204 are positioned between the icon representation of the front cover 32 and the ATS housing 110 (see FIG. 9B). These icons may help identify which filter life display is associated with which filter. In the illustrated embodiment, the front cover and ATS housing icon are statically illuminated by white LEDs operating at 50% brightness.

In the illustrated embodiment, the filter life display 200 for a pre-filter is "present" when the pre-filter requires no maintenance and "on" when the pre-filter requires maintenance (such as cleaning or replacement). " an information display element 200 that can be illuminated in a state. The "Present" state may also be created by statically lighting a green LED. The “on” state may be provided by flashing a red LED.

In the illustrated embodiment, the filter life display 202 for the particulate filter 102 includes four information display elements 18a each representing a quarter of the filter life. When the filter life display is on, all four display elements 18a are illuminated. The number of elements 18a illuminated in the "on" state represents the remaining filter life. The remaining element 18a is illuminated in the "Present" state to provide a visual reminder that the filter life is represented by 1/4. The number of segments may vary from application to application as desired. For example, additional granularity may be provided by increasing the number of information display elements 18a associated with the filter life display 202 . In the illustrated embodiment, the filter life display 202 for the particulate filter includes a color LED to assist in representing the filter life as follows:

75 to 100% lifetime - all 4 segments illuminated green at 100% brightness

50 to 75% lifetime - lower 3 segments green at 100% brightness, upper segments white at 50% brightness

25 to 50% lifetime - bottom segment amber at 100% brightness, top 3 segments white at 50% brightness

1 to 10% lifetime - lower segment red at 100% brightness, upper 3 segments white at 50% brightness

0% lifetime - lower segments blink red at 100% brightness, upper 3 segments white at 50% brightness

In the illustrated embodiment, the filter life display 204 for the carbon filter 104 includes four display elements 18a that may be illuminated to a “present” or “on” state using essentially the same methodology described above. is essentially the same as the filter life display 202 for the particulate filter 102.

In the illustrated embodiment, dust level display 206 includes a plurality of individual information display elements 18a that can be illuminated in a “present” or “on” state. When the dust level display 206 is displayed, the number of information display elements 18a illuminated in the “on” state represents the measured dust level, and other information display elements 18a are illuminated in the “present” state. . This allows the operator to better understand dust levels by comparing the ratio of “on” segments to the total number of segments. In the illustrated embodiment, the dust level segments are grouped into three sets, and a single set of LEDs are associated with each set of three segments. As a result, the dust level display 206 of the illustrated embodiment is 15 segments, but only 6 different settings (i.e., 0 segments, 3 segments, 6 segments, 9 segments, 12 segments or 15 segments). ) has In the illustrated embodiment, the dust level display 206 includes color LEDs to assist in recognizing:

Level 1 - 1st segment illuminated in green at 100% brightness, remaining segments illuminated in white at 50% brightness

Level 2 - First 2 segments illuminated in amber at 100% brightness, remaining segments illuminated in white at 50% brightness

Level 3 - first 3 segments illuminated in amber at 100% brightness, remaining segments illuminated in white at 50% brightness

Level 4 - First 4 segments illuminated in red at 100% brightness, remaining segments illuminated in white at 50% brightness

Level 5 - All 5 segments illuminated in red at 100% brightness

In this embodiment, the blower speed display element 18b performs the dual function of receiving a touch sensor input to display the current blower speed and allowing the operator to manually set the blower speed. Like the dust level display, the blower speed display includes a plurality of separate display elements 18 with two LEDs that can be selectively illuminated to represent a "present" state or an "on" state. Unlike the dust level display, the blower speed display is also a touch sensor array that can be used by the operator to manually select the blower speed. When blower speed is displayed, the number of blower speed input display elements that are illuminated in the “on” state are selected to represent the blower speed, and other blower speed input display elements are illuminated in the “present” state so that the operator can view the available blower speed options. and compare the ratio of "on" segments to "present" segments to understand the current blower speed. In the illustrated embodiment, the "presence" state may be created by statically lighting a white LED at 50% brightness. The "on" state may be provided by statically lighting a blue LED at 100% brightness. To provide a touch sensor, each blower speed display element 18b includes an associated segment of capacitive film. As discussed above, control subsystem 60 monitors the capacitive film segment to determine when a touch has occurred. When a touch occurs, control subsystem 60 may adjust the blower speed to match the selected setting.

In the illustrated embodiment, the power input display element 208 is illuminated red at 100% brightness when in the “present” state and white at 100% brightness when in the “on” state. The “smart” mode input display element 210 is illuminated white at 50% brightness when in the “present” state and illuminated blue at 100% brightness when in the “on” state. The “turbo” mode input display element 212 is illuminated white at 50% brightness when in the “present” state and illuminated blue at 100% brightness when in the “on” state. The “night” mode input display element 214 is illuminated white at 50% brightness when in the “present” state and illuminated red at 50% brightness when in the “on” state.

As discussed above, the control system 12 of the illustrated embodiment provides control schemes with four different modes of operation: “smart” mode (or automatic mode), “manual” mode, “turbo” mode, and “night” mode. implement This control scheme will be explained with reference to FIG. 13 . During a “smart” mode of operation, control subsystem 60 evaluates dust sensor readings and determines blower speed based on these readings. This allows the ATS 10 to adapt to changing levels of airborne dust in the environment. In this mode, the operator has the option to enter turbo mode, night mode, manual mode or power off the ATS. Thus, the turbo mode input display elements, night mode input display elements, various blower speed input display elements and power input display elements are illuminated. The turbo mode input display element and the night mode input display element are illuminated in the "Present" state. The smart mode input display element and power input display element are illuminated in the "on" state. If the smart mode input display element is touched while the system is already operating in smart mode, the system will transition to manual operation mode. The blower speed input display element is illuminated to indicate the current blower speed and available manual adjustment options according to the lighting methodology described above. Additionally, in smart mode, the dust level information display element is illuminated to indicate the real-time dust level according to the lighting methodology described above. In smart mode, the filter life display is illuminated for a specified period of time whenever the user interacts with the ATS 10. For example, control subsystem 60 may illuminate the filter life display for a period of 15 seconds whenever an operator interacts with a touch sensor in display 16 . Additionally, the filter life display may be illuminated whenever a filter requires attention and for as long as it requires attention (eg, any one of the filters needs to be cleaned or replaced).

The control subsystem enters manual mode (or direct mode) when the operator touches the blower speed input display element 18b. Once in manual mode, control subsystem 60 operates blower 56 at a speed selected by the operator. In this mode, the operator has the option to enter turbo mode, night mode, smart mode, adjust the blower speed or power off the ATS. Thus, the turbo mode input display elements, night mode input display elements, smart mode input display elements, various blower speed input display elements, and power input display elements are illuminated. The smart mode input display element, the turbo mode input display element and the night mode input display element are illuminated in a "presence" state. The power input display element is illuminated in the "on" state. The blower speed input display element is illuminated to indicate the current blower speed and available manual adjustment options according to the lighting methodology described above. Additionally, the dust level information display element is illuminated to indicate the real-time dust level according to the lighting methodology described above. In this mode, the filter life display is illuminated for a specified period of time whenever the user interacts with the ATS 10. For example, control subsystem 60 may illuminate the filter life display for a period of 15 seconds whenever an operator interacts with a touch sensor in display 16 . Additionally, the filter life display may be illuminated whenever a filter requires attention and for as long as it requires attention (eg, any one of the filters needs to be cleaned or replaced).

Turbo mode is entered when the operator touches the turbo mode input display element. Once in turbo mode, control subsystem 60 operates blower 56 at the highest speed setting (or some other predetermined speed setting) for a preset period of time (eg, 30 minutes), then Automatically return to operating mode. Turbo mode may be interrupted by a touch of a button, in which case the system may transition out of turbo mode prior to expiration of a preset time period. In this mode, the operator touches the smart mode input display element to enter smart mode, touches the blower speed input display element to adjust the blower speed and enters manual mode, or touches the power input display element to power off the ATS. have options Additionally, the operator has the option of touching the turbo mode input display element to cause the system to immediately return to the previous settings. As such, the turbo mode input display elements, smart mode input display elements, various blower speed input display elements, and power input display elements are illuminated. The turbo mode input display element and power input display element are illuminated in the "on" state, while the smart mode input display element is illuminated in the "present" state. The blower speed input display element is illuminated to indicate the current blower speed and available manual adjustment options according to the lighting methodology described above. Additionally, the dust level information display element is illuminated to indicate the real-time dust level according to the lighting methodology described above. In this mode, the filter life display is illuminated for a specified period of time whenever the user interacts with the ATS 10. For example, control subsystem 60 may illuminate the filter life display for a period of 15 seconds whenever an operator interacts with a touch sensor in display 16 . Additionally, the filter life display may be illuminated whenever and as long as the filter requires attention.

Night mode is entered when the operator touches the night mode input display element. Once in night mode, control subsystem 60 continues to operate ATS 10 in the same mode, but the content of the display is reduced to minimize light emission. In this mode, the operator has the option of either disabling the night mode by touching the night mode input display element (i.e., re-enabling the display depending on the current operating mode) or powering off the ATS by touching the power input display element. . In night mode, only the night mode input display element and the power input display element are illuminated, both of which are illuminated in the "on" state. In an alternative embodiment, control subsystem 60 may be configured to re-enable display 16 (in whole or in part) when an operator comes very close to display 16 . For example, control subsystem 60 uses capacitive touch sensor array 64 to sense the proximity of an operator and as a trigger to illuminate all input display elements 18b so that the operator has a full set of controls. You can also use this. If the operator does not enter a command within a specified period of time (eg, 15 seconds) after display 16 is re-enabled, control subsystem 60 may return display 16 to a night mode.

When the ATS 10 is plugged in but not powered on, the control subsystem 60 illuminates the power input display elements in a "Present" state. This allows the operator to see the power control elements. Once the power button is touched, the control subsystem 60 may start the system either in smart mode or in manual mode. When started in smart mode, the control subsystem 60 takes the dust sensor reading, determines the appropriate blower speed based on the dust sensor reading, and then engages the blower at the determined speed. All these steps are taken automatically without the need for operator input. When started in the manual mode, the control subsystem 60 controls the blower 56 until instructed to do so by operator input, for example, operator touch of one of the blower speed input display elements 18b. ) does not start.

The control schemes described above are merely examples. Control system 12 may implement various alternative control schemes. For example, one alternative control scheme is shown in FIG. 14 . This alternative control scheme is essentially identical to the control scheme described above, except as described herein. To implement this control scheme, the display may include an additional mode control button associated with a "manual" mode (labeled "user" in Fig. 14). In this control scheme, the operator is required to use a mode control button to transition between different operating modes. For example, an operator is required to touch a "user" mode input display element to enter manual operation mode (instead of simply touching a blower speed input display element). Once in manual mode, the operator can control the blower speed by touching the desired blower speed input display element. As another example of this control scheme, the operator can simply leave the turbo mode off by touching the turbo mode input display element or letting a preset time elapse. Similarly, the operator can simply dismiss the night mode by touching the night mode input display element.

Another alternative control scheme is shown in FIG. 15 . In this embodiment, the control scheme is essentially the same as the first control scheme described above, except as described herein. To implement this control scheme, the display may include an additional mode control button associated with an "option" mode (labeled "option" in FIG. 15). When the system is powered on, it starts in “smart” mode, and blower speed is automatically set based on input from the dust sensor. To provide additional control options, the “options” mode button must be touched. In "smart" mode, the power input display elements are illuminated in the "on" state, the smart mode input display elements are illuminated in the "on" state, the optional mode input display elements are illuminated in the "present" state, and the dust level display is illuminated The turbo mode input display element, night mode input display element and blower speed display are off. In smart mode, the operator can touch the power input display element to power off the system or the option mode input display element to transition to option mode.

Once in “option” mode, power input display elements are illuminated in “on” state, smart mode input display elements are illuminated in “on” state, option mode input display elements are illuminated in “on” state, dust level The display is illuminated, and the blower speed display is illuminated. Additionally, the turbo mode input display element and the night mode input display element are illuminated in a "present" state. In option mode, the operator can touch the power input display element to power off the system, touch the smart mode input display element to return to smart mode, and touch the option mode input display element to return to smart mode. touch the turbo mode input display element to enter the turbo mode, touch the night mode input display element to enter the night mode, or touch the blower speed input display element to select the blower speed and select the manual mode can enter If no buttons are touched within a specified period of time (eg, 60 seconds), the system may automatically return to smart mode.

Once in "manual" mode, the power input display elements are illuminated in the "on" state, the option mode input display elements are illuminated in the "present" state, the dust level display is illuminated, and the blower speed display is illuminated. Additionally, the smart mode input display element, turbo mode input display element and night mode input display element are turned off. In manual mode, the operator can power off the system by touching the power input display element, touch the option mode input display element to enter "manual option" mode, or touch the blower speed input display element to blower speed. can choose While the system remains in manual mode, it will continue to run the blower at the speed selected by the operator.

Once in "manual option" mode, the power input display element and option mode input display element are illuminated in the "on" state, and the dust level display and blower speed display are illuminated. Additionally, the smart mode input display element, turbo mode input display element, and night mode input display element are illuminated in a "presence" state. In manual option mode, the operator can power off the system by touching the power input display element, return to smart mode by touching the smart mode input display element, and return to manual mode by touching the option mode input display element. touch the turbo mode input display element to enter turbo mode, touch the night mode input display element to enter night mode, or touch the blower speed input display element to select the blower speed and manually You can return to the mode. If no buttons are touched within a specified period of time (eg, 60 seconds), the system may automatically return to smart mode. If no buttons are touched within a specified period of time (eg, 60 seconds), the system may automatically return to manual mode.

Once in "turbo" mode, the control subsystem operates the blower at the highest speed setting (or some other predetermined speed setting) for a preset period of time (eg, 30 minutes), then automatically returns to the previous operating mode. return to Turbo mode may also be interrupted by a touch of a button, in which case the system may transition out of turbo mode prior to expiration of a preset time period. The turbo mode input display element and power input display element are illuminated in the "on" state. The blower speed display and dust level display are also illuminated. Additionally, the smart mode input display element, option mode input display element and night mode input display element are turned off. In this mode, the operator has the option of touching the turbo mode input display element to return to the previous mode or touch the power input display element to power off the ATS.

Once in "night" mode, the control subsystem continues to operate the ATS in the same mode of operation, but the content of the display is reduced to minimize light emission. In the night mode, the night mode input display elements are illuminated in the “present” state and the power input display elements are illuminated in the “on” state. The rest of the display elements are off. In this mode, the operator has the option of either disabling the night mode by touching the night mode input display element (i.e., re-enabling the display depending on the current operating mode) or powering off the ATS by touching the power input display element. .

D. Front cover

As described above, the ATS 10 includes a removable front cover 32 that closes the front of the ATS 10 covering the filters 100, 102, 104, as well as the electronic module 14 and blower 56. includes The front cover 32 of the illustrated embodiment defines a central inlet 106a and is offset from the ATS housing 110 such that they cooperatively form side inlets 106b and 106c. An inlet trim piece 98 may fit within the central inlet 106a. In the illustrated embodiment, the front cover 32 is convex to create a relatively large head space between the rear surface of the front cover 32 and the installed filter. This may allow air to enter more freely into the ATS 10 through the central inlet 106a.

In this embodiment, the front cover 32 also forms the interface surface of the "dead front" display 16. As such, the front cover 32 of this embodiment is translucent at least in the area of the LED array 62, the light duct array 72 and the electronics module 14 over the screens 74a and 74b (e.g., not completely transparent or not completely opaque to visible light). The front cover 32 may be made from a translucent polymer (eg, a molded thermoplastic) with a paint coating or film coating that provides the desired translucency. In one embodiment, the front cover 32 is covered by an in-mold film process. It may be necessary to carefully control the paint or film coating applied to the front cover 32 to facilitate the proper appearance of the "dead front" display. Alternatively, the front cover 32 may be made from a translucent material, such as a molded translucent thermoplastic.

In the illustrated embodiment, the front cover 32 is configured to allow one-handed removal and installation. The front cover 32 includes mechanical attachment points on the top and a pair of magnetic attachment points on the bottom. In the illustrated embodiment, the mechanical attachment points mate on the electronic module 14 . This helps ensure proper alignment between the front cover 32 and the underlying components of the display 16, which may help ensure proper appearance and operation of the “dead front” display. The mechanical attachment points mate to the electronics module 14 in the illustrated embodiment, but may mate to other structures in alternative embodiments.

Referring now to FIGS. 19A and 19B , the mechanical attachment point of the illustrated embodiment includes a lip 36 extending from the front cover 32 and configured to latch onto the electronic module 14 . In the illustrated embodiment, the lip 36 extends approximately the full width of the electronic module 14, except that it may also include a gap 37 (see FIG. 2) aligned with the dust sensor inlet 82. do. The lip 36 in this embodiment is oriented at an angle such that the lip 36 catches on the electronic module 14 as the front cover 32 is lowered into place. This causes the front cover 32 to disengage from the ATS housing 110 by sliding it upward relative to the ATS housing 110 . This upward sliding motion not only disengages lip 36 from electronics module 14, but may also simultaneously disengage magnet 90 from attachment plate 92 within ATS housing 110 (as described below). as), thereby facilitating removal. The size, shape and configuration of lip 36 may vary from application to application. In alternative embodiments, the lip may be replaced by essentially any other male or female structure capable of engaging the electronic module 14 .

In this embodiment, the front cover 32 includes two magnetic attachment point locations facing opposite sides of the bottom of the front cover 32 . Each magnetic attachment point includes a magnet 90 supported by the front cover 32 and a magnetic attraction plate 92 mounted to the ATS housing 110 (see Figs. 20A and 20B). The magnet 90 may be a disc-shaped rare earth magnet mounted in a corresponding socket 94 protruding from the rear of the front cover 32. The plate 92 is dimensioned such that the magnet 90 substantially disengages from the plate 92 when the front cover 32 slides upwards a sufficient distance relative to the lip 36 to remove the electronics module 14. It may be set and molded. The number, size, shape and configuration of magnets and plates may vary from application to application as desired. For example, stronger magnets or more magnetic attachment points may be used to increase the force required to remove the front cover 32.

In use, the front cover 32 may be removed and installed in a variety of ways. One option for removing the front cover 32 is shown in FIG. 17A. With this option, the front cover 32 is slid upward relative to the ATS housing 110 a distance sufficient for the lip 36 to remove the electronics module 14, then the top of the front cover 32 is It is tilted away from the ATS housing 110 to overcome any residual magnetic attraction at the magnetic attachment point. The front cover may be installed using essentially the reverse process. Another option for removing the filter is shown in FIG. 17B. With this option, the operator pulls the lower portion of the front cover 32 away from the ATS housing 110 until it reaches the bottom and the magnet 90 disengages from the plate 92. The operator then lifts the front cover 32 a distance sufficient for the lip 36 to remove the electronics module 14. The front cover 32 drapes the top of the front cover 32 over the electronics module 14 and then the bottom of the front cover 32 towards the ATS housing 110 until the magnet 90 engages the plate 92. It can also be installed by swinging.

The front cover 32 may also include interlocking magnets (not shown) that allow the control subsystem 60 to recognize when the front cover 32 is installed and when it is removed. An interlocking magnet may be positioned toward the top of the front cover 32 where it may be sensed by a Hall effect or other magnetic field sensor incorporated within the electronics module 14. As an alternative to using separate interlocking magnets, the ATS 10 may base the presence or absence of a front cover 32 on one of the magnets 90 used to attach the front cover 32 to the ATS housing 110. may include a Hall effect sensor (or other magnetic field sensor) positioned to detect

If desired, the electronics module 14 may include LEDs or other light sources that may be coupled to provide illumination visible through the central entry opening 106a and/or at the side of the front cover 32 . This lighting may serve as accent lighting or may have a functional purpose. For example, control system 12 may provide blue lighting or no lighting when ATS 10 is functioning properly and requires no maintenance, and red lighting when operator intervention is required. may also provide. This may occur when the filter needs to be replaced or cleaned, or when there has been a system error. The red light may flash when certain urgent issues exist.

As noted above, the front cover 32 has an appropriate level of translucency to create a "dead front" display 16. Alternatively, a "dead front" display may be created by a translucent component disposed under front cover 32, such as a separate panel disposed over electronics module 14. In this embodiment, the front cover 32 may be transparent or sufficiently translucent to allow the underlying "dead front" display to be seen through the front cover 32 .

E. Mobility Features

In the illustrated embodiment, ATS 10 may be configured to interface with one of a plurality of interchangeable bases 40 . In the illustrated embodiment, bases 40, 40', 40" are secured to ATS housing 110 using screws or other fasteners. The number and location of fasteners may vary from application to application. Alternative fasteners As or in addition, the ATS housing 110 and bases 40, 40', 40" may have snap features that allow the desired base to snap fit to the ATS 10.

Different bases 40 may provide different structures for receiving power cords 42 and/or different structures for supporting ATS 10 . An ATS 10 having three alternative bases 40, 40', 40" is shown in Figures 21 and 22. Generally, base 40 is provided for manually winding power cord 42. has a bobbin 44 and a plurality of fixed feet 46; base 40' has a bobbin 44' and a plurality of casters 46' for manually winding the power cord 42'; Base 40" includes a cord retrieval assembly 45 with an automatic take-up reel (not shown) and a combination of fixed feet 46" and rollers 47". While the drawings show an embodiment of a bobbin that extends laterally across a portion of the ATS housing 110, the term "bobbin" refers to any individual piece provided as a structure around which power cord 42 may be wound. It is intended to include a feature or combination of features.

In the illustrated embodiment, the ATS 10 also includes a handle 48 disposed on the upper rear portion of the ATS housing 110. The handle 48 in this embodiment extends essentially the entire width of the ATS 10 to allow the ATS 10 to be gripped with one hand from the center or two hands from both sides. In this embodiment, handle 48 has a relatively deep central pocket deep enough to receive an operator's fingers up to approximately two knuckles and a relatively shallow side pocket deep enough to receive an operator's fingers up to approximately first knuckles. May contain pockets. Handle 48 may be a one-piece component secured to ATS housing 110 by fasteners, for example, or it may be integrally formed with other portions of ATS housing 110.

With respect to base 40, handle 48 may be used to lift ATS 10 as it moves from one position to another. With respect to base 40', handles may be used to grip the ATS when rolling it from position to position on casters 46'. With respect to base 40", handle 48" can be used to tilt the ATS 10 forward on rollers 47" and roll the ATS 10 from one position to another.

F. Filter retainer assembly

As described above, the ATS 10 includes a pre-filter 100, a particulate filter 102 and a carbon filter 104 that are removably fitted within a filter housing 112. The system includes a filter retainer assembly 50 that facilitates quick and secure installation and removal of the filter. In the illustrated embodiment, the filter retainer assembly 50 includes a hook 52 and a pair of clips 54 integrated into the frame of the particulate filter 102, as well as a locking protrusion integrated into the ATS housing 110 ( 126). Since the prefilter is secured to the particulate filter 102 and the particulate filter 102 covers the carbon filter 104, the filter retainer assembly 50 effectively secures all three filters 100, 102, 104. In the illustrated embodiment, clip 54 is configured to tightly draw particulate filter 102 into filter housing 112 as it is closed. This helps press the face seal 118 on the particulate filter 102 against the shoulder 114 to facilitate a hermetic seal.

Referring now to FIG. 29B, the hooking portion 52 is disposed at the lower center of the frame of the particulate filter 102. The hooking portion 52 in this embodiment is molded integrally with the frame of the particulate filter 102, but may alternatively be formed separately and attached to the frame. The hook 52 of the illustrated embodiment has a quarter-round cross section that may facilitate installation and removal from a corresponding cavity 120 in the filter housing 112 . The number, size, shape and configuration of catches 52 and cavities 120 may vary from application to application as desired. For example, the positions of catch 52 and cavity 120 may be reversed such that the catch extends from filter housing 112 and a cavity is formed within particulate filter 102 .

As perhaps best shown in FIGS. 29A and 29B , clips 54 are rotatably mounted on opposite sides of the frame of particulate filter 102 . Each clip 54 may include a handle 122 and a hook 124 . Handle 122 is configured to provide structure that can be used by an operator to rotate clip 54 . The hook 124 is configured to engage the locking protrusion 126 as the clip 54 is rotated to the closed position. The hook 124 and locking protrusion 126 are configured so that there is interference between the two for a short distance as the clip 54 approaches the closed position. This creates a snap fit that helps secure the clip 54 in the closed position. Further movement towards the closed position causes hook 124 to flex, creating resistance to further movement towards the closed position. As the clip 54 continues toward the closed position, the hook 124 clears the area of interference and begins to return to its original, unbent state. This urges the clip 54 into a closed position in the rest of the way. In the illustrated embodiment, the location and configuration of the hook 124 relative to the pivot position provides a cam-like function in which the clip 54 pulls the particulate filter 102 into the filter housing 112 as the clip 54 closes. selected to provide The operation of clip 54 is shown in FIGS. 30A-30D. In FIG. 30A, clip 54 is shown in an open position. In this position, the hook 124 is disengaged from the locking protrusion 126 . 30B shows the clip 54 in a partially closed position. As can be seen, the hook 124 is moved into engagement with the locking protrusion 126 . In this position, the particulate filter 102 is drawn partially into the filter housing 112 as can be seen by comparison with reference line R. 30C shows the clip 54 moved farther towards the closed position. In this view, the hook 124 is engaged with the locking lug 126 and begins to bend outward away from the locking lug 126 due to interference between the two. As can be seen, the particulate filter 102 is drawn farther into the filter housing 112 . In FIG. 30D, clip 54 is in the closed position. In this position, the hook 124 has moved past the interference area and is fully engaged with the locking protrusion 126 . The particulate filter 102 is drawn completely into the filter housing 112 .

Removal of the particulate filter 102 is described with respect to FIGS. 28A-28D. In the first view, the front cover 32 and prefilter 100 have been removed to provide access to the particulate filter 102 (see FIG. 28A). In the illustrated embodiment, it is not necessary to remove the prefilter 100 from the particulate filter 102. In the following figure, each clip 54 has been rotated from a closed position to an open position (see FIG. 28B). This disengages the hook 124 from the locking protrusion 126 in the filter housing 112 . The following figure shows the top of the particulate filter 102 angled away from the filter housing 112 (see FIG. 28C). The last view shows the filter 102 lifted from the filter housing 112 to disengage the catch 52 from the cavity 120 (see FIG. 28D). The particulate filter 102 can be installed using essentially the reverse process.

The design and construction of the clip may vary from application to application. Alternative clips 54' and 54" are shown in Figures 31A-31D and 32A-32D. In all of these alternative embodiments, the filter retainer assembly has clips 54', 54" in the closed position. It further includes locking pins 128' and 128" that secure. The locking pins 128' and 128" project from the particulate filter 102, but may alternatively project from the filter housing 112 if desired. An alternative clip 54' includes teeth 130' protruding from the outer edge of the clip 54'. The teeth 130' are configured to engage a corresponding recess 132' in the locking pin 128' when the clip 54' is in the closed position. Together, the teeth 130' and locking pin 128' snap-lock the clip 54' to the closed position. The operation of the clip 54' is shown with reference to Figs. 31A-31D. In Fig. 31A, the clip 54' is shown in an open position. In this position, the hook 124' is disengaged from the locking lug 126'. 31B shows the clip 54' in a partially closed position. As can be seen, the hook 124' is moved into engagement with the locking protrusion 126'. In this position, the particulate filter 102 is drawn partially into the filter housing 112 as can be seen by comparison with reference line R. 31C shows the clip 54' moved farther towards the closed position. In this view, the hook 124' is also engaged in the locked position 126' and draws the filter 102 further into the filter housing 112. In FIG. 31D, the clip 54' is in the closed position. In this position, the teeth 130' are seated within the recesses 132' and the particulate filter 102 is drawn completely into the filter housing 112. The correlation between the teeth 130' and the lock pin 128' helps secure the clip 54' in the closed position.

An alternative clip 54" is similar to clip 54'. In this embodiment, clip 54" interacts with locking pin 128" to control the movement and feel of clip 54". Contains a series of outlines. More specifically, the clip 54" includes a stop 134" and a pedestal 136" configured to engage the locking pin 128" when the clip 54" is in an open or closed position. Portion 134" is configured to engage locking pin 128" when clip 54" is in the fully open position. The stop 134" helps limit the range of motion of the clip 54". The pedestal 136" is configured to interlock with the locking pin 128" when the clip 54" is in the fully closed position. The leading edge of the pedestal 136" locks when the clip 54" is closed or opened. The operation of the clip 54" will now be described with reference to Figures 32A-32D. 32A, clip 54" is shown in an open position. In this position, hook 124" is disengaged from locking lug 126", and stop 134" is disengaged from locking pin 128". ) and Fig. 32b shows the clip 54" in a partially closed position. The hook 124" moves in engagement with the locking protrusion 126". In this position, the particulate filter 102 is drawn partially into the filter housing 112 as can be seen by comparison with reference line R. 32C shows the clip 54" moved further towards the closed position. In this view, the hook 124" is also engaged in the locked position 126" and further into the filter housing 112. Pull filter 102. Also, the leading edge of pedestal 136" begins to engage locking pin 128". In Fig. 32D, clip 54" is in the closed position. In this position, the locking pin 128" and pedestal 136" are fully engaged, and the particulate filter 102 is drawn completely into the filter housing 112. The relationship between the locking pin 128" and the pedestal 136" helps secure the clip 54' in the closed position.

G. Alternative Embodiments

The invention can be implemented in a wide variety of alternative embodiments. For example, an alternative embodiment is shown in FIGS. 33A-53D. Except to the extent described below or shown in the accompanying drawings, this alternative embodiment is generally the same as the embodiment disclosed above in FIGS. 1A-20B. For ease of disclosure, this alternative embodiment will be described with the same reference numerals as used in connection with the ATS 10, except as preceded by the number "4". For example, an alternative ATS is indicated by reference numeral 410 (similar to ATS 10), and an ATS housing of an alternative ATS is indicated by reference numeral 4110 (similar to ATS housing 110). ].

Referring now to FIGS. 33A, 33B, and 34 , ATS 410 generally includes control system 412, blower 456, prefilter 4100, particulate filter 4102, and activated carbon filter 4104. It includes a housing assembly for accommodating it. The ATS 410 includes front raw air inlets 4106a - 4106c through which untreated air is drawn into the system and a rear air outlet 4108 through which treated air can be returned to the environment (FIG. 44 reference). In operation, control system 412 operates blower 456 to draw untreated air into ATS 410 through inlets 4106a-c, and feeds untreated air through three filters 4100, 4102, 4104. and the treated air is then discharged through outlet 4108. The size, shape, and configuration of the inlet, outlet, and internal flow path may vary from application to application as desired.

Referring again to FIG. 34 , the housing assembly generally includes a main housing 4110 , a filter housing 4112 and an upper housing 4113 . The main housing 4110 mainly forms the rear, side and bottom of the ATS 410. Like the ATS 10, the filter housing 4112 is attached to the main housing 4110 to close the front of the ATS 410 and provides a pedestal for the particulate filter 4102 and the carbon filter 4104. As perhaps best shown in FIG. 49 , upper housing 4113 is attached to the back of filter housing 4112 by, for example, screws (not shown). Upper housing 4113 includes integral handle 448 . In this embodiment, handle 448 includes a center section that can be held with one hand and a pair of side sections that can be held with both hands. In the illustrated embodiment, main housing 4110 includes a cord take-up 444 (or bobbin) for manually winding a power cord (not shown) (see FIG. 33B). In this embodiment, the cord take-up 444 includes a pair of fingers 445 spaced apart on opposite sides of the power cord input port 447 . The size, shape, and configuration of the fingers 445 may vary depending on, for example, characteristics of a power cord. As shown, the cord take-up 444 may be positioned within a recess in the main housing 4110 so as not to protrude and thus not increase the profile of the ATS 410 .

ATS 410 includes a removable front cover 432 that closes the front of ATS 410 covering display 416 and filters 4100 , 4102 , 4104 . As can be seen in various views such as FIGS. 33A, 44 and 46, the front cover 432 forms a central inlet 4106a, and the front cover 432 and filter housing 4112 form a side inlet 410b. to 410c) are spaced apart from the filter housing 4112 to cooperatively form. The illustrated front cover 432 is made from an opaque plastic material, for example by injection molding. Front cover 432 may alternatively be made from a wide variety of alternative materials. In this embodiment, the front cover 432 includes a window 433 covering the display 416 . Window 433 fits within a corresponding opening 435 formed in front cover 432 . To hide unilluminated display elements, window 433 in this embodiment is translucent at least in the area or areas above display element 418 . Window 433 may be made from a translucent polymer (eg, a molded thermoplastic) with a paint coating or film coating that provides the desired translucency. In one embodiment, window 433 is covered by an in-mold film process. It may be necessary to carefully control the paint or film coating applied to window 433 to facilitate the proper appearance of a "dead front" display. Alternatively, window 433 may be made from a translucent material, such as a molded translucent thermoplastic.

In the illustrated embodiment, front cover 432 is configured to allow for one-handed removal and installation. The front cover 432 includes mechanical attachment points on the top and a pair of magnetic attachment points on the bottom. Referring now to FIGS. 45A , 45B and 46 , the mechanical attachment points of the illustrated embodiment extend from the front cover 432 and are structured within the pedestal 437 within the electronics module 414 or surrounding the electronics module 414 . and a catch 436 (or lip) configured to fit within. The hooking portion 436 may be manufactured separately and attached to the front cover 432 (see FIG. 46) or integrally formed with the front cover 432 (not shown). The catch portion 436 in this embodiment is oriented at an angle such that the catch portion 436 is retained within the pedestal 437 as the front cover 32 is closed. This causes the front cover 432 to disengage from the ATS housing 4110 by sliding it upward relative to the ATS housing 4110. This upward sliding motion not only disengages the locking portion 436 from the pedestal 437, but also simultaneously disengages the magnet 490 from the attachment plate 492 in the ATS housing 4110 (as described below). as), thereby facilitating removal. The size, shape, and configuration of the catch portion 436 may vary from application to application. In an alternative embodiment, hook 436 may be replaced by essentially any other male or female structure capable of engaging with pedestal 437 or other similar structure in or around electronic module 414 .

The front cover 432 of this embodiment includes two magnetic attachment point locations facing opposite sides of the bottom of the front cover 432 . Each magnetic attachment point includes a magnet 490 supported by the front cover 432 and a magnetic attraction plate 492 mounted to the ATS housing 4110 (see FIG. 48). The magnet 490 may be a disc-shaped rare earth magnet mounted in a corresponding socket 494 protruding from the rear of the front cover 432. In this embodiment, plate 492 is configured to perform two functions - (i) provide a magnetic attraction structure for magnet 490 and (ii) rotatably support roller 447 . In this embodiment, each plate 492 is generally L-shaped with a first leg 493 positioned to receive a magnet 490 and a second leg 495 rotatably supporting a roller 447. am. The first leg 493 and the second leg 495 are generally planar, but may include ribs or other features to enhance strength or interfit with adjacent components of the ATS 410 . First leg 493 extends rearwardly and includes a pair of mounting tabs 491 that allow plate 492 to be attached to housing 4110 by, for example, screws (not shown). Second leg 495 defines a circular opening 497 configured to rotatably receive an axle (or shaft) of roller 447 . In use, two plates 492 capture opposite ends of the shaft or axle of roller 447 . In this embodiment, the plate 492 is stamped from sheet stock and is configured to be ambidextrous so that the same plate 492 can be used on opposite sides of the ATS 410 by simply flipping the plate 180 degrees. For example, mounting tabs 491 may be centered vertically, and each tab 491 may be spaced the same distance from a corresponding end of first leg 493 . Also, the circular opening 497 may be perpendicular to the second leg 495 .

In this embodiment, the control system 412 includes a capacitive sensor that allows the system to recognize when the front cover 432 is installed and when it is removed (described in more detail below). This eliminates the need for any interlocking magnets or magnetic field sensors used to determine the presence of a front cover as described above with respect to the ATS 10.

As described above, the ATS 410 includes a prefilter 4100, a particulate filter 4102 and a carbon filter 4104. As with ATS 10, the filters are secured within ATS 410 by filter retainer assembly 450 incorporated into particulate filter 4102. More specifically, the filters fit the carbon filter 4104 into the carbon filter seat in the filter housing 4112, the particulate filter 4102 fits over the carbon filter 4104 and into the particulate filter seat in the filter housing 4112, It is installed by securing the particulate filter 4102 using the filter retainer assembly 450 and attaching the prefilter 4100 to the particulate filter 4102. In this embodiment, filter retainer assembly 450 differs somewhat from filter retainer assembly 50 described above with respect to ATS 10 . In this embodiment, the bottom of the particulate filter 4102 is held by a hook 452 that fits within a cavity 4120 in the filter housing 4112, and the top is held by a locking protrusion 4126 extending from the filter housing 4112. ) and interlocking clips 454 (or latches). 52A-52D illustrate the process of removing the particulate filter 4102 from the ATS 410. 52A shows the particulate filter 4102 installed with the clip 454 in the closed position. 52B shows the particulate filter 4102 installed with the clip 454 rotated to the open position. 52C shows the top of the particulate filter 4102 tilted away from the ATS 410. Tilt movement of filter 4102 also disengages (and nearly disengages) catch 452 from cavity 4120 . 52D shows the particulate filter 4102 removed from the ATS 410. In the illustrated embodiment, clip 454 is configured to hermetically draw particulate filter 4102 into filter housing 4112 as it is closed. This helps press a cotton seal (not shown) on the particulate filter 4102 against the shoulder 4114 to facilitate a gastight seal.

Referring now to FIGS. 51A-51C , the hooking portion 452 is disposed at the lower center of the frame of the particulate filter 4102 . The hooking portion 452 in this embodiment is molded integrally with the frame of the particulate filter 4102, but may alternatively be formed separately and attached to the frame. The hook 452 of the illustrated embodiment has a quarter round cross section that may facilitate installation and removal from a corresponding cavity 4120 in the filter housing 4112. The number, size, shape and configuration of catches 452 and cavities 4120 may vary from application to application as desired.

In this embodiment, the clip 454 is rotatably mounted near the upper center of the frame of the particulate filter 4102. Clip 454 includes handle 4122 , teeth 4130 and hook 4124 . Teeth 4130 are configured to engage locking pin 4128 as clip 454 is rotated to a closed position. More specifically, interference between teeth 4130 and locking pin 4128 causes clip 454 to snap into a closed position. Further, the hook 4124 is configured to engage the locking protrusion 4126 as the clip 454 is rotated to the closed position. In the illustrated embodiment, the location and configuration of the hook 4124 and locking protrusion 4126 is such that as the clip 454 is closed, the clip 454 pulls the particulate filter 4102 into the filter housing 4112 as a cam. selected to provide a function. Operation of the clip 454 is shown in FIGS. 53A-53D. In FIG. 53A , clip 454 is shown in an open position with hook 4124 disengaged from locking lug 4126 . 53B shows clip 454 rotated clockwise to a partially closed position. 53C shows clip 454 rotated further clockwise into position where teeth 4130 are about to engage locking pin 4128. Finally, FIG. 53D shows clip 454 in the closed position. As can be seen, teeth 4130 have moved past locking pin 4128 and are now resisting movement of clip 454 out of the closed/locked position. Also, the hook 4124 is moved to engage with the locking protrusion 4126. The interaction between the hook 4124 and the locking protrusion 4126 pulls the particulate filter 4102 fully into the filter housing 4112.

In this embodiment, the pre-filter 4100 is secured to the particulate filter 4102 using a somewhat different configuration than that incorporated into the ATS 10. As shown in FIG. 34 , the prefilter frame 4116 includes a pair of tabs 4304 on the bottom and a pair of slotted tabs 4306 on the top. 51A-51C, the particulate filter 4102 includes a pair of slotted feet 4300 at the bottom and a pair of fingers 4302 at the top. Finger 4302 may be configured to snap lock into engagement with slotted tab 4306 . For example, fingers 4302 may be angled upwardly from the particulate filter frame. In use, the prefilter 4100 first inserts the tabs 4304 on the bottom of the prefilter frame 4116 into slots in the foot 4300 on the bottom of the particulate filter 4102, then the top of the particulate filter 4102. It is secured to the particulate filter 4102 by sloping the top of the pre-filter 4100 inward toward the top of the particulate filter 4102 to snap-fit the slotted tab 4306 over the fingers 4302 of the particulate filter 4102.

control system

The ATS 410 includes a control system 412 that controls the operation of the ATS 410 and provides a user interface for displaying information and receiving input from an operator. The primary functions of control system 412 are to control the rate at which ATS 410 operates to treat air based on sensed parameters or operator input, track filter usage, set mode, motor speed, and filter life. to notify the operator and accept the operator's command. The control system 412 includes a user interface that is embodied as a "dead front" display 416 that displays information and receives operator input related to operation and maintenance of the system. The display 416 includes a plurality of display elements 418 that are visible only when illuminated to provide a dynamic display that provides information and changes to present the control options available at any given time ( FIGS. 40 and 41 ). comparison). Like the display 16 described above, the display 416 of the ATS 410 includes an illuminated information display element 418a to provide information regarding the status or monitored characteristics of the ATS, and an operator to the control system 412. and an input display element 418b having a touch sensor to allow input to be provided (see FIG. 41 ). In addition to accepting user input, input display element 418b may also provide information regarding the status of the ATS, such as operating mode and blower speed. Display 416 indicates that display 416 includes one additional display element to indicate when display element 418 is positioned differently and display 416 uses an integrated WiFi transceiver to communicate with an external network. Other than that, it includes display elements 418 that are essentially the same as display 16 described above.

Control subsystem 460 coordinates the collection of data from various other subsystems, including capacitive touch sensor array 464, dust sensor 480, RFID subsystem 468, and radio communication subsystem 470. and control circuitry and firmware configured to operate the ATS 410. The various modes of operation of the system are described in more detail below. Referring now to the schematic diagram of FIG. 36 , the electronics module 414 generally has distributed control with a primary application controller 510 , a touch detection controller 512 , an LED driver controller 514 and an RFID controller 516 include the device Primary controller 510 includes dust sensor 480, RFID subsystem 468 (RFID controller 516 and RFID antenna 518), wireless communication subsystem 470 (Bluetooth module 520 and Wi-Fi module ( 522] and electrical components constituting display 416 (including LED driver controller 514 and touch detection controller 512). Primary controller 510 is also coupled to blower motor power supply 530 to allow primary controller 510 to control blower speed and in some applications to receive feedback from blower motor power supply 530 . The primary application controller 510 includes a buzzer 524 to provide audible output, a UART head 526 for diagnostics, and pre-programmed operating default values, as well as filter lifetime, usage time, counters, and ATS 410. Also coupled to non-volatile memory such as EEPROM 528 for storage of historical operational data, such as other variables that may be used in connection with the operation of. The touch detection controller 512 is electrically connected to the capacitive touch key formed by the plurality of capacitive traces 532 and to the ambient light sensor 534 . In use, touch detection controller 512 may monitor capacitive traces and ambient light sensor 534 and provide touch/proximity information and ambient light information to primary application controller 510 . LED driver controller 514 is coupled to LED array 462 . In operation, the LED driver controller 514 may illuminate individual LEDs within the LED array 462 according to commands received from the primary application controller 510 .

Control system 412 is incorporated within self-contained electronic module 414 . Referring now to Figs. In this embodiment, the base 4150 is mounted to the filter housing 4112 and provides a structure upon which the various components of the electronic module 414 are mounted. Base 4150 includes an electronics assembly pedestal (not shown) that allows electronics assembly 550 to be mounted to the underside of base 4150 by, for example, screws (not shown) extending through mounting tabs 552. do. Base 4150 also includes a dust sensor compartment 560 that seats dust sensor 480 and provides a flow path for directing air over dust sensor 480 . The flow path generally includes a sensor inlet 482 , a sensor tunnel 484 and a sensor outlet 486 . Sensor inlet 482 may be closed by dust sensor screen 562 to prevent large particles from contaminating dust sensor 480 . The dust sensor 480 is enclosed within a pair of rubber shell halves 488a, 488b that create an airtight seal around the dust sensor 480. The dust sensor cover 4152 may define a plurality of air flow holes 564 that allow air to flow out of the external sensor compartment 560 to a location upstream from the particulate filter 4102 . It should be noted that the dust sensor flow path is described for a system in which a partial vacuum created by the blower 456 draws air into the ATS 410 along the dust sensor flow path. Alternatively, the air sensor exhausted by the ATS 410 through the air outlet 4108 creates a partial vacuum greater than the blower creates at the air flow hole 564 in the dust sensor cover 4152. If created at the inlet 482, it may flow back through the dust sensor flow path.

The electronics assembly 550 for the ATS 410 generally includes a bottom PCB 566, a light guide 472 and a top PCB 568 (see FIG. 39). Bottom PCB 566 may support the bulk of circuitry and circuit components, including various controllers and LED arrays 462 . The LED array may also include a plurality of individual LEDs 462a that can be selectively illuminated when appropriate. Each LED 462a may include a single LED or multiple LEDs providing a variety of lighting options. In this embodiment, each LED associated with the filter life display element may include a red LED and a green LED, and each LED associated with the ATS display element, power display element, and line display element may include a white LED. Alternatively, each LED associated with the blower speed display element, turbo mode display element, WiFi display element and dust sensor cloud sensor element may include a blue LED and a white LED, wherein the LED associated with the first dust level display is may include a red LED, a green LED and a yellow LED, each LED associated with the second and third dust levels may include a red LED and a yellow LED, respectively associated with the fourth and fifth dust levels The LEDs in may include a red LED, and each LED associated with a night mode display element may include a red LED and a white LED. As with ATS 10, LED array 462 may be replaced or supplemented with other types of light sources such as OLED, laser and EL light sources.

Light guide 472 provides a mounting structure for PCBs 566 and 568 and provides an array of LEDs on lower PCB 566 through openings in upper PCB 568 to illuminate display elements 418 on screen 474. 462 includes a plurality of light ducts 472a that transmit light. Light duct 472a is configured to create a light path from LED 462a to corresponding display element 418 . The light ducts 472a may be isolated from each other to prevent leakage of light from one LED 462a to an adjacent display element 418 . The surface of the light duct 472a may be coated or textured to create diffuse light.

An upper PCB 568 is mounted atop the light guide 472 . The top PCB 568 defines a plurality of optical apertures 570 and a plurality of traces 532 that function as capacitive touch sensors. In this embodiment, top PCB 568 includes a separate light aperture 570 for each display element 418 (see FIGS. 38 and 39 ). The size, shape and configuration of light aperture 570 may vary from application to application depending on, for example, the desired lighting effect. As discussed above, control system 410 includes a plurality of capacitive touch sensors 464 . The design and construction of capacitive touch sensors may vary from application to application. For example, each capacitive touch sensor may include a pair of electrodes, and a touch may be recognized by monitoring the mutual capacitance between the electrode pairs. As another example, each capacitive touch sensor may include a single electrode, and a touch may be recognized by monitoring the electrode's own capacitance. Referring now to FIG. 39 , a trace 532 (or pair of traces) extends around each optical aperture 570 associated with an input display element 418b. More specifically, a copper conductive element conductive trace 532 (or pair of traces) is provided around the periphery of each optical aperture 570 associated with an input display element 418b. The size, shape, degree and other aspects of the configuration of each conductive trace 532 may vary from application to application to provide desired touch sensor characteristics. Additionally, top PCB 568 may include additional conductive traces 532b intended to sense the proximity of a user. As shown in FIG. 39 , proximity sensor trace 532b may be a relatively large trace extending along a substantial portion of top PCB 568 . In use, touch detection controller 512 may monitor various conductive traces 532 to determine when a touch or proximity event occurs.

In this embodiment, control system 412 includes a single screen 474 covering all display elements 418 . The screen 474 is a laminated structure that generally includes a diffusion layer and a shielding layer. The diffusion layer diffuses the light generated by the LED. Shielding layers include various opaque and translucent materials, such as inks, paints, films, and other adhesive layers to block light to create the desired graphics. In the illustrated embodiment, the shielding layer is disposed on the outer surface of the diffusion layer facing the LED or other light source, but may be located in other locations if desired. Although the diffusion and shielding layers are part of a single stacked construction in the illustrated embodiment, they may alternatively be separate components. For example, these layers may be fabricated separately and placed adjacent to each other during assembly of the display 416 .

Operation of the ATS 410 will now be described with reference to FIGS. 42 and 43 . 42 is a diagram of display 416 outlining all display elements 418, including information display element 418a and input display element 418b. 43 shows a series of views of displays 416a through 416m in different modes of operation. In the illustrated embodiment, display 416 can be in three different states when powered off. When ATS 410 is unplugged or otherwise not receiving power, the display is completely blank as shown by display 416a. When ATS 410 is plugged in, but not powered and no user is in proximity, display elements 618a - 618c are configured to display a line across display 416, as shown by display 416b. illuminated When ATS 410 is plugged in, but not powered and a user is in proximity, display elements 618a - 618c, 608 are illuminated to show a line and power icon, as shown by display 416c.

Control system 412 may determine that a user is in proximity by monitoring capacitive trace 532b. Control system 412 and proximity trace 532b may be configured to determine when a user is in proximity using a variety of alternative approaches. In the illustrated embodiment, the control system 412 and the proximity trace 532b are generated by the user waving the user's hand over the display 416 within about 12 inches of the window 433, for example, to trace the trace 532b. ) is configured to determine that the user is in proximity when coming within approximately 12 inches of The size, shape and configuration of trace 532b and/or the sensitivity of control system 412 to changes detected within trace 532b increases how close the user must be to the system to conclude that the user is in proximity. It can be changed to increase or decrease it. Control system 412 may determine that a user is not in proximity based on the lapse of time after display 416 receives user input. For example, control system 412 may reset the countdown timer whenever a user input event occurs. A user input event may occur whenever the user touches touchkey trace 532 or whenever the user comes within sufficient proximity of proximity trace 532b. When the countdown timer reaches zero, the control system 412 will conclude that no user is nearby and will adjust the display 416 accordingly. Control system 412 may then begin continuously monitoring proximity trace 532b to determine when the user comes within sufficient proximity to display 416 again. Additionally, control system 412 may also conclude that a user is proximate if touchkey trace 532 is touched by the user.

Once powered on, display 416 is capable of operating in a variety of alternate states. When ATS 410 is in manual mode and a user is in proximity, all display elements are properly illuminated, as shown by display 416d. Display elements 618a - 618c are illuminated to show lines. Display element 608 is illuminated to show the power icon. Display element 614 is illuminated to show the night mode icon. Since ATS 410 is not in night mode, display element 614 is illuminated white. A display element 606 including a dust icon 606a and an appropriate dust level indicator 606b is illuminated. Since the ATS 410 is not in automatic mode, the dust icon 606a is illuminated white. Also, since the dust level is sufficiently low, only a single dust level indicator 606b is illuminated, which is illuminated green. Display element 616 is illuminated, including blower icon 616a and appropriate blower speed indicator 616b. Since the ATS 410 is in manual mode, the blower icon 616a is illuminated blue. All blower speed indicators 616b are illuminated with the actual blower speed illuminated blue and the indicator representing the available higher blower speed illuminated white. Display element 612 is illuminated white to indicate that ATS 410 is not in turbo mode. Filter life display elements 600, 602, 604 are illuminated, including ATS icon 605. In this example, all filters have a remaining life and are therefore illuminated green. The ATS icon 605 is illuminated in white. Finally, display element 620 is illuminated to display the WiFi icon. In this example, no WiFi transmission is taking place and therefore the WiFi icon is illuminated white. When the operator is no longer proximate, the display 416 transitions to a reduced state, showing significantly fewer display elements. Referring now to display 416e, display element 618b is illuminated to show the center of the line. Display element 606 is illuminated, including dust icon 606a and appropriate dust level indicator 606b. Display elements 616 are illuminated, including blower icon 616a and appropriate blower speed indicator 616b. In this state, only the blower speed indicator representing the actual blower speed is illuminated in blue. Higher blower speeds available are not illuminated. When any filter expires, the display will also show filter life display elements 600, 602, 604, including ATS icon 605 as well. In the example shown in display 416f, prefilter icon 600 is illuminated green to indicate that it has a remaining life, and particulate filter icon 602 and carbon filter icon 604 are illuminated red to indicate that they have expired. indicated, the ATS icon is illuminated in white.

An operator can place the ATS 410 in automatic mode by touching the dust sensor icon 606a. When ATS 410 is in automatic mode and a user is in proximity, all display elements are properly illuminated, as shown by display 416g. Display elements 618a - 618c are illuminated to show lines. Display element 608 is illuminated to show the power icon. Display element 614 is illuminated white to indicate the night mode icon. Display element 606 is illuminated, including dust icon 606a and appropriate dust level indicator 606b. Since the ATS 410 is in automatic mode, the dust icon 606a is illuminated blue. Also, since the dust level is at the highest display level, all dust level indicators 606b are illuminated red. Display elements 616 are illuminated, including blower icon 616a and appropriate blower speed indicator 616b. Since the ATS 410 is in automatic mode, the blower icon 616a is illuminated white. The blower speed indicator 616b representing the actual blower speed is illuminated in blue. In this example, the blower is running at full speed, so all indicators are illuminated blue. Display element 612 is illuminated white to indicate that ATS 410 is not in turbo mode. Filter life display elements 600, 602, 604 are illuminated, including the ATS icon. In this example, all filters have a remaining life and are therefore illuminated green. The ATS icon is illuminated in white. Finally, display element 620 is illuminated to display the WiFi icon. In this example, no WiFi transmission is taking place and therefore the WiFi icon is illuminated white. When the operator is no longer proximate, the display 416 transitions to a reduced state, showing significantly fewer display elements. Referring now to display 416h, display element 618b is illuminated to show the center of the line. Display element 606 is illuminated, including dust icon 606a (blue) and appropriate dust level indicator 606b (red). Display element 616 is illuminated, including blower icon 616a (white) and appropriate blower speed indicator 616b (blue). When any filter expires, display 416 will also show filter life display elements 600, 602, 604, including ATS icon 605 (eg, see display 416f).

The operator can activate the turbo mode by touching the turbo icon. When ATS 410 is in turbo mode and the user is in proximity, all display elements are properly illuminated, as shown by display 416L. Display elements 618a - 618c are illuminated to show lines. Display element 608 is illuminated white to indicate the power icon. Display element 614 is illuminated white to indicate the night mode icon. Display element 606 is illuminated, including dust icon 606a (white) and appropriate dust level indicator 606b. Since the dust level is moderate, the three dust level indicators are illuminated yellow. Display element 616 is illuminated, including blower icon 616a (white) and appropriate blower speed indicator 616b. Since the ATS 410 is in turbo mode, the blowers run at full speed and all indicators 616b are illuminated blue. Display element 612 is illuminated blue to indicate that ATS 410 is in turbo mode. Filter life display elements 600, 602, 604 are illuminated, including ATS icon 605. In this example, all filters have a remaining life and are therefore illuminated green. The ATS icon is illuminated in white. Finally, display element 620 is illuminated to display the WiFi icon. In this example, no WiFi transmission is taking place and therefore the WiFi icon is illuminated white. When the operator is no longer proximate, the display 416 transitions to a reduced state, showing significantly fewer display elements. Referring now to display 416j, display elements 618a and 618b are illuminated to show the left and center portions of the line. Display element 606 is illuminated, including dust icon 606a (white) and appropriate dust level indicator 606b (yellow). Display element 616 is illuminated, including blower icon 616a (white) and appropriate blower speed indicator 616b (blue). Display element 612 is illuminated blue to indicate that ATS 410 is not in turbo mode. When any filter expires, display 416 will also show filter life display elements 600, 602, 604, including ATS icon 605 (eg, see display 416f).

ATS 410 can be placed in night mode by touching the night mode icon. When in night mode, display 416 only displays night icon 614 illuminated in red as illuminated in display 416k. When in night mode, control system 412 limits the maximum speed of blower 456 and slows the speed at which blower 456 transitions from one speed to another. Control system 412 may be configured to implement other features when in night mode. In this embodiment, control system 412 may operate in a manual or automatic mode when in night mode. For example, the user may touch the night mode icon 614 while the control system 412 is in manual or automatic mode, and the control system 412 may otherwise turn the blower 456 on according to the existing mode. It will transition to night mode while continuing to operate. When transitioning from manual mode to night mode, control system 412 will continue to operate blower 456 at the manually specified speed unless the manually set speed exceeds the maximum speed threshold. If so, control system 412 reduces the blower speed to match the maximum speed threshold for night mode. When transitioning from night mode to automatic mode, the control system 412 ensures that the blower speed does not exceed a maximum speed threshold and the change from one blower speed to another is a slower transition rate. , but let the automatic speed control algorithm control the blower speed.

ATS 410 may also have the ability to connect to external applications using Wi-Fi or other wireless communication systems. To enter wireless communication mode, the operator may touch the WiFi icon (display element 620). While ATS 410 is attempting to establish a wireless connection, display element 620 may be illuminated blue in a blinking pattern, as shown by display 416l. Once a connection is established and while ATS 410 remains in wireless communication mode, blinking may cease and display element 620 may illuminate blue, as shown by display 416m. In this embodiment, wireless communication may be employed during any mode of operation, and control system 412 may continue to operate display 416 according to the existing mode of operation. Wireless communication may also be used to communicate things about the operation of the ATS 410 to a remote location, such as filter life data for the various filters, speed and time of operation of the blower motor and dust sensor readings over time. Wireless communication may also be used to transmit diagnostic information, including data that may allow an individual to evaluate the operation of the ATS 410 from a remote location to determine if maintenance or restoration is required. Wireless communication may also be used to update firmware and/or any other programming or data contained within control system 412 .

The above description is a description of the present embodiment of the present invention. Various changes and changes may be made without departing from the spirit and broader aspects of the present invention as defined in the appended claims, which are to be construed according to the principles of patent law, including the doctrine of equivalents. This disclosure is presented for purposes of illustration and should not be construed as an exhaustive description of all embodiments of the invention, or as limiting the scope of the claims to the specific elements illustrated or described in connection with these embodiments. For example, and without limitation, any individual element(s) of the described invention may be replaced by alternative elements that provide substantially similar functionality or otherwise provide suitable operation. This includes, for example, currently known alternative elements, such as those currently known to a person skilled in the art, and alternatives that may be developed in the future, such as those that a person skilled in the art may recognize as an alternative, at the time of development. contains negative elements. Further, the disclosed embodiments include a plurality of features that are described in unison and that may cooperatively provide a set of benefits. The present invention is not intended to be limited to only these embodiments which include all these features or provide all the mentioned benefits, except to the extent otherwise expressly set out in the appended claims. Any recitation of a claim element in the singular form, eg, using the singular expression “the” or “the”, should not be construed as limiting the element to the singular.

Embodiments of the invention in which exclusive features or privileges are claimed are defined as follows.

Claims (21)

an air handling system;
a filter housing;
a filter fitted within the filter housing;
The filter has a frame and a clip rotatably mounted to the frame, the clip being manually movable between an open position and a closed position, the clip moving when the clip is moved from the open position to the closed position. configured to interact with the filter housing to draw the filter into the filter housing and secure the filter to the filter housing when in a closed position;
The clip is disposed toward one end of the filter,
The frame of the filter includes a hooking part disposed toward an opposite end of the filter, the hooking part is configured to protrude from the frame of the filter and engage with the filter housing, whereby the hooking part is inserted into the filter housing. wherein the filter is secured within the filter housing by aligning and moving the clip from the open position to the closed position. 2. The air treatment system of claim 1, wherein the filter housing includes a locking protrusion, and wherein the clip includes a hook configured to engage the locking protrusion when in the closed position. 3. The method of claim 2, wherein the clip and the locking protrusion allow the hook to enter an initial engaged state with the locking protrusion through a partial movement between the open position and the closed position and to move toward the closed position after initial engagement. wherein continuous movement of a clip is configured to retract the filter into the filter housing. 4. The method of claim 3 wherein said filter housing includes a shoulder, said filter comprising a face seal coupled with said shoulder, whereby pulling of said filter into said filter housing compresses said face seal against said shoulder. , an air handling system. 5. The method of claim 4, wherein the hook and the locking protrusion are configured such that the hook deforms relative to the clip when the clip is moved from the open position to the closed position, the deformation being the inward or outward movement of the clip into or out of the closed position. An air handling system that creates a snap fit that resists movement of the clip. 5. The filter of claim 4, wherein the filter includes a locking pin disposed adjacent to the clip, the clip interfitting with the locking pin when the clip is in the closed position to move the clip into and out of the closed position. and an exterior surface configured to create a snap fit that resists movement of the air handling system. 7. The air handling system of claim 6, wherein said outer surface includes teeth, said teeth cooperating with said locking pin to secure said clip in said closed position. 7. The air handling system of claim 6, wherein the outer surface defines a pedestal, and wherein the locking pin and the pedestal are interfitted when the clip is in the closed position. 9. The air treatment system of claim 8, wherein the outer surface includes a stop, the stop configured to engage the locking pin to limit the range of travel of the clip. 2. The air handling system of claim 1, wherein the filter includes two clips arranged on opposite sides of the frame, the filter including a hook projecting from the frame and spaced apart from the clips. 2. The air treatment system of claim 1, wherein the filter includes a clip located near the top center of the filter. A filter for an air handling system,
a frame having a top, a bottom, and a pair of opposite sides;
a filter medium supported by the frame;
A hooking portion protruding from the frame;
a retaining clip rotatably mounted to the frame;
The clip is manually movable between open and closed positions, and the clip is configured to interact with the filter housing to draw the filter into the filter housing and secure the filter to the filter housing when in the closed position. is composed of
The filter of claim 1 , wherein the hooking portion is disposed at the lower portion of the frame and the clip is disposed toward the upper portion of the frame. 13. The filter of claim 12, wherein the clip includes a hook configured to engage the filter housing when in the closed position. 14. The snap fit of claim 13, wherein the hook is configured such that the hook deforms when the clip is moved from the open position to the closed position, the deformation resisting movement of the clip into and out of the closed position. A filter that creates wealth. 14. The device of claim 13, further comprising a locking pin disposed adjacent to the clip, the clip interacting with the locking pin when the clip is in the closed position to prevent movement of the clip into and out of the closed position. A filter comprising an exterior surface configured to create a resisting snap fit. 16. A filter according to claim 15, wherein said outer surface includes teeth, said locking pin defining a recess, said teeth and said recess interfitting when said clip is in said closed position. 16. The filter of claim 15, wherein the outer surface forms a pedestal, and wherein the locking pin and the pedestal are interfitted when the clip is in the closed position. 18. The filter of claim 17, wherein the outer surface includes a stop, the stop configured to engage the locking pin to limit the range of motion of the clip. 2. The air treatment system of claim 1 wherein said clip is integrally formed with said frame of said filter. 2. The air treatment system of claim 1 wherein said clip is attached to said frame of said filter. delete

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