CN111735129A - Air treatment system - Google Patents

Abstract

An air treatment system having an improved control system. The control system may include a dynamic "dead-front" display that varies the display based on the mode of operation. The display may include a capacitive touch sensor and include an array of segments or lines of capacitive film integrated into the display. The control system may include a self-contained electronics module that may be tested and calibrated prior to installation in the ATS. The dust sensor assembly may be integrated into the electronics module. The front cover may be attached by a mechanical attachment at the top and a magnetic attachment at the bottom. The ATS may include a filter holder assembly with a rotating clasp configured to perform in a cam-like manner to securely hold the particulate filter and carbon filter in place.

Description

Air treatment system

Technical Field

The present invention relates to air treatment systems, and more particularly, to a portable room air filtration system. The application is a divisional application with a parent application number of 201580037028.5 and an application date of 2015, 05 and 05, and is named as an air treatment system.

Background

Air handling systems continue to grow in popularity as concerns over air quality continue to be a significant issue. This growth has led to an increase in the use of commercial and domestic air treatment systems. Conventional home air treatment systems are self-contained units that can be placed in a room where air is desired to be treated. Domestic air treatment systems are generally operated by: draw room air into them, treat the air with a technology(s), and release the treated air back into the room. The treated air contains a lower concentration of airborne (airbourne) contaminants than the air escaping from the room. The treated air mixes with the room air and, as a result, the concentration of pollutants in the room air is reduced.

Air handling systems with different kinds of control systems are available. The control system provides different methods for controlling the operation of the air handling system, and for allowing operator input. The design and construction of the control system can have a significant impact on the function and aesthetic appearance of the air treatment system.

Many conventional air treatment systems include a series of special filters that are tailored to address specific air quality issues. For example, home air treatment systems often include a pre-filter, a particulate filter, and an odor filter. The function of the pre-filter is typically to remove relatively large components from the air, such as hair and dust agglomerates. Particulate filters typically function to remove smaller airborne particles. Particulate filters are available in a variety of configurations. For example, the particulate filter may include a pleated material with non-woven fibers that trap particulates and may be as effective as a HEPA filter. Odor filters are also available in a variety of types and configurations. Many odor filters include activated carbon, which adsorbs a range of impurities including, but not limited to, many organic chemicals. Conventional particulate and carbon filters have a limited life and require frequent replacement. The structure of the air treatment system, as well as the structure of the mechanisms used to secure the filter within the air treatment system, can have a significant impact on the efficiency of the system, and can dramatically affect the complexity and effort required to replace the filter.

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

Disclosure of Invention

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 a clean and simple appearance to the ATS and that 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 underlying arrangement of a plurality of light sources (e.g., LEDs). To generate the desired pattern, the individual light sources may be covered by a screen (screen) having a shading layer and a diffusing layer. A translucent cover may be provided over the control system to hide the underlying structure and allow the graphic image to be seen 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 pipe assembly having a plurality of individual pipes coupled side-by-side to direct light from the light source to corresponding display elements.

In one embodiment, the touch sensor is a capacitive sensor. In such embodiments, a capacitive film (e.g., a transparent PET film coated with indium tin oxide) can be integrally incorporated into the structure overlying each light source. For example, each light source may be covered by a laminated screen, the screen including a shading layer and a diffusing layer, and the capacitive film may be implemented as an additional layer of the screen. As another example, the capacitive film may be separate from the screen and may be positioned above or below the screen where the capacitive film is able to sense the presence of an operator's finger. In alternative embodiments, conductive traces (trace) may be integrally incorporated into the structure overlying each light source to function as a capacitive sensor. For example, a printed circuit board ("PCB") may be positioned over the array of light pipes. The PCB may define openings in each individual light pipe and may include a line around each opening associated with the light pipe for input of the display element. The PCB may also include relatively large conductive traces that extend across a substantial portion of the face of the PCB to provide a capacitive sensor that is sensitive enough to function as a proximity sensor. The proximity sensor may be configured to sense the presence of an operator (e.g., an operator's hand) within two feet of the display.

In one embodiment, the ATS has a removable front cover that overlays the display, and the control system is configured to recognize touches differently based on whether the cover is installed or removed. This allows the user to control the system whether or not the shroud is in place. In one embodiment, the control system is configured to enable different sets of control options depending on whether the shroud is installed. For example, the control system may provide a reduced set of control options and/or provide additional control options when the cover is removed. The control system may use one or more capacitive touch sensors (e.g., proximity sensors) to recognize whether the cover is installed or removed.

In one embodiment, the control system includes a dust sensor integrated into the electronics module. The dust sensor may be arranged such that air is drawn into the dust sensor by means of a partial vacuum generated by the ATS fan. After passing through the dust sensor, the air passes through a filter and returns to the room in a treated state. Alternatively, the dust sensor may be arranged such that air is drawn into the dust sensor by virtue of the flow of treated air discharged by the ATS.

In another aspect, the present invention provides a front cover with magnetic interlocks that allow for easy installation and removal, and allows the control system to recognize whether the cover is installed. In one embodiment, the front cover includes one or more mechanical attachment points at the top and one or more magnetic attachment points at the bottom end. The mechanical attachment points may include lips configured to snap onto corresponding features in the ATS housing. For example, the lip may snap onto the electronic module to help ensure proper alignment between the front cover and the electronic module. The size, shape and configuration of the snap-in portion (catch) may vary. For example, it may extend substantially across the width of the front cover, or it may extend only across a 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 that is attached to the front cover after manufacture. The front cover may be made of translucent plastic configured to provide an opaque appearance while allowing light from the display to shine through. In one embodiment, the exposed face of the front cover may be covered with a film that is applied using an in-mold film (in-mold) process. In another embodiment, the exposed surface may be covered with a thin layer of lacquer using a spray process or a direct transfer process (i.e., screen or pad printing, or hot film transfer). Alternatively, the front cover may be substantially opaque and may include a window overlying the display. The window may be made of translucent plastic configured to provide an opaque appearance while allowing light from the display to shine through. In one embodiment, the exposed face of the window may be covered with a film, which is applied using an in-mold film process. In another embodiment, the exposed face of the window may be covered with a thin layer of lacquer using a spray process or a direct transfer process (i.e., screen or pad printing, or hot film transfer).

In another aspect, the present invention provides an ATS housing with a replaceable base. The number and type of bases may vary, but in one embodiment, the ATS may include multiple bases that provide different structures for receiving wires, and/or for supporting different feet of the ATS. With respect to the cord, the ATS may be capable of receiving a base with structure for manually winding the cord or a retractable cord assembly with an automatic take-up spool. With respect to the feet, the base may include a fixed foot, a caster, a wheel, and/or a single elongated roller. As an alternative to an interchangeable base, the base may be integrated into the ATS and may include feet and a single elongated roller. The ATS may include a handle at the top rear of the housing. In one embodiment, the handle may extend substantially the entire width of the ATS, thereby allowing the ATS to be gripped in the center by one hand, or toward the opposite side by both hands.

In another aspect, the present invention provides a filter holder (retainer) assembly that provides for easy and secure installation of a filter. In this embodiment, the ATS includes a particulate filter and an activated carbon filter. The activated carbon filter is first fitted into the filter housing and the 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 fasteners that interact with corresponding features in the ATS. One or more fasteners may be configured to perform in a cam-like manner to securely clamp the particulate filter and carbon filter in place. The ATS may also include a pre-filter that is snap-fit onto the particulate filter. The pre-filter may include a coarse filter media supported by a grid-like pre-filter holder.

The present invention provides an improved control system for an ATS. The use of self-contained electronics modules allows testing and calibration of the electronics prior to the mounting and assembly of the ATS. This may also facilitate replacement of the electronic module when necessary. For example, using an on-board dust sensor with integral bonding ducts eliminates the need to separately mount the dust sensor and wire the dust sensor to an electronics module. The control system includes a "dead front" display with an integral capacitive touch sensor. This allows a completely sealed electronic module without any moving parts, providing an improved reliability. The use of a "dead-front" display allows for a dynamic display that transitions between modes-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 the display element to be illuminated in different configurations depending on the use. Wireless connectivity allows for control and data exchange with remote devices (e.g., smartphones and tablets), including data logging and historical trend monitoring, without the need for visible or infrared transparent plastics. The RFID tag may provide improved filter life and product performance tracking, and may allow filter life to be reset without operator intervention. The dust sensor may not only be used to control fan speed, but also provide a more accurate filter life calculation. On the other hand, the ATS includes a front panel that can be easily removed and installed with one hand without needing to deep bend or kneel to access the attachment points. The front cover may cover the electronic module by a window that is at least partially translucent or has partial translucency to provide a "dead-front" display. Further, the side and center inlets allow air to freely enter the ATS. On the other hand, providing interchangeable bases allows the ATS to be easily customized for different applications and customers with different preferences. This provides greater flexibility and rapid exchange between modules with different features. For example, the variety of feet may vary, and the variety of wire management features may vary. The use of a one-piece handle that roughly extends the width of the ATS provides various advantages. Which allows the operator to manipulate the ATS with one or both hands at multiple wrist/palm angles. It may also be formed to provide structural reinforcement under the cantilever feature of the ATS. In one embodiment, the base may include casters or a central roller that allows the ATS to be easily moved with a single hand engaging the center of the handle. In another aspect, the present invention provides a simple and effective clamp arrangement for securing a particulate filter to an ATS. By positioning one or more clamps toward the top of the filter and snapping toward the bottom, the filter can be secured or released without needing to deep bend or kneel. The one or more clamps may provide an improved seal by automatically pulling the filters into tighter engagement with the sealing surface as they engage. It is also possible that one or more clamps work in only one direction, thereby ensuring that the filter is installed in a positive orientation.

These and other objects, advantages and features of the invention will be more fully understood and appreciated by reference to the detailed description of the current embodiment and the drawings.

Before the embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangements of components set forth in the following description or illustrated in the drawings. The invention is capable of implementation in various other embodiments or of being practiced or carried out with alternatives not specifically disclosed herein. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including" and "comprising" and variations thereof is meant to encompass the items listed thereafter and equivalents thereof as well as additional items and equivalents thereof. Further, numbering may be used in the description of the various embodiments. The numbers used should not be construed to limit the invention to any particular order or number of components unless explicitly stated otherwise. The use of numbering should not be read as excluding any additional steps or components from the scope of the invention that may be combined with or into the numbered steps or components. Any reference to an element as claimed as "at least one of X, Y and Z" is intended to include X, Y or either Z alone, and any combination of X, Y and Z, e.g., X, Y, Z; x, Y, respectively; x, Z, respectively; and Y, Z.

Drawings

Fig. 1A is a front perspective view of an ATS according to an embodiment of the present invention.

Fig. 1B is a rear perspective view of the ATS.

Fig. 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 of fig. 1.

Fig. 4 is a schematic display of an electronic module.

Fig. 5 is a front view of the electronic module.

Fig. 6 is a perspective view of the electronic module with the cover removed.

Fig. 7 is an exploded perspective view of the electronic module.

Fig. 8 is a perspective view of a portion of the ATS showing a "dead-front" display with no elements lit.

Fig. 9A is a front view of the display showing the outline of all display elements.

FIG. 9B is a front view of the display showing all display elements illuminated in the "on" state.

Fig. 10 is a perspective view of a portion of the ATS showing a "dead-front" display showing various elements illuminated in different states.

Fig. 11 is a front view of the display when the power is off.

Fig. 12 is a front view of the display in the night mode.

FIG. 13 is a schematic display diagram of a control architecture according to an embodiment of the present disclosure.

FIG. 14 is a schematic illustration of an alternative control architecture.

FIG. 15 is a schematic representation of a second alternative control architecture.

Fig. 16 is a front perspective view of the ATS showing the air inlet.

17A-B are diagrams illustrating alternative methods for removing the front cover.

Fig. 18 is a rear perspective view of the front cover.

19A-B are cross-sectional views illustrating the top attachment point between the front cover and the ATS.

20A-B are cross-sectional views illustrating the bottom attachment point between the front cover and the ATS.

Fig. 21 is a partially exploded front perspective view showing the ATS and three interchangeable bases.

Fig. 22 is a partially exploded rear perspective view showing the ATS and three interchangeable bases.

Fig. 23 is a bottom perspective view showing the base with the securing feet.

Fig. 24 is a bottom perspective view showing the base with casters.

Fig. 25 is a bottom perspective view showing the base with the fixed foot and the roller.

Fig. 26 is a perspective view of a handle and a portion of an ATS including the handle.

Fig. 27 is a perspective view of the ATS with the front cover and pre-filter removed.

28A-D are various diagrams illustrating various stages of particulate filter removal.

Fig. 29A is a perspective view of the particulate filter.

Fig. 29B is a side elevational view of the particulate filter.

Fig. 30A-D are a series of diagrams illustrating actuation of a filter latch according to an embodiment of the invention.

Fig. 31A-D are a series of diagrams illustrating actuation of a filter latch according to an alternative embodiment.

Fig. 32A-D are a series of diagrams illustrating actuation of a filter latch according to a second alternative embodiment.

Fig. 33A is a front perspective view of an ATS according to an alternative embodiment of the present invention.

Fig. 33B is a rear perspective view of an alternative ATS.

Fig. 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 the alternative ATS taken along line 35-35 of fig. 33A.

Fig. 36 is a schematic presentation of an electronic module of an alternative ATS.

Fig. 37 is a perspective view of a display assembly of an alternative ATS.

Fig. 38 is a partially exploded perspective view of a display assembly of an alternative ATS.

Fig. 39 is an exploded perspective view of the electronic module.

FIG. 40 is a perspective view of an alternative ATS showing a "dead-front" display with no elements lit.

FIG. 41 is a perspective view of an alternative ATS showing a "dead-front" display with an input profile of all display elements.

FIG. 42 is a top perspective view of an alternative ATS showing a "dead-front" display with an outline of all display elements.

FIG. 43 is a schematic display diagram of a control architecture according to an alternative embodiment.

Fig. 44 is a front perspective view of an alternative ATS showing the air inlet.

45A-B are diagrams illustrating alternative methods for removing the front cover of an alternative ATS.

Fig. 46A is a rear perspective view of the front cover.

Fig. 46B is an exploded perspective view of the front cover.

Fig. 47 is a partial cross-sectional view of a bottom portion of an alternative ATS.

Fig. 48A is a perspective view of the attachment plate.

Fig. 48B is a top plan view of the attachment plate.

FIG. 49 is an exploded perspective view of a portion of the filter housing and a portion of the top housing.

Fig. 50 is a perspective view of the ATS with the front cover and pre-filter removed.

Fig. 51A is a perspective view of the particulate filter.

Fig. 51B is a front view of the particulate filter.

Fig. 51C is a side elevational view of the particulate filter.

Fig. 51D is a top plan view of the particulate filter.

Fig. 52A-D are various diagrams illustrating different stages of particulate filter removal.

Fig. 53A-D are a series of diagrams illustrating actuation of an alternative filter latch.

Detailed Description

A. Overview

An air handling system ("ATS") according to an embodiment of the present invention is shown in fig. 1. The ATS10 of the illustrated embodiment generally includes a pre-filter 100, a particulate filter 102, and an activated carbon filter 104. The ATS10 also includes a fan 56 for drawing air from the environment into the ATS10, moving the air through the filter, and returning the filtered air to the environment.

The ATS10 of the illustrated embodiment includes a control system 12, the control system 12 having an electronics module 14, the electronics module 14 providing a "dead front" display 16. The display 16 of this embodiment includes a plurality of display elements 18 that are selectively illuminated by the control system 12 to provide dynamic content. Some of the display elements 18 may include touch sensors 20 that allow operator input. In this embodiment, the electronic module 14 includes a plurality of light sources 22, such as LEDs, each uniquely assigned to the display element 18. Each light source 22 may be covered by a screen 24, the screen 24 having a mask layer 26 and a diffuser layer 28. Each touch sensor 20 may also include a capacitive film 30 positioned over the light source 22. In this embodiment, a "dead-front" appearance may be created by the translucent front cover 32, the translucent front cover 32 hiding underlying structures and allowing the display element 18 to be visible only when illuminated.

Front cover 32, on the other hand, is secured to ATS10 housing 34 using a combination of mechanical and magnetic attachment points. The mechanical attachment point of the illustrated embodiment includes a lip 36 at the top of the front cover 32, and a pair of magnets 90 at the bottom of the front cover 32. The lip 36 is configured to be captured on a corresponding configuration in the 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 yet another aspect, the ATS10 is capable of receiving one of a plurality of interchangeable bases 40. Different bases 40 may provide different structures for receiving the power cord 42 and/or different structures for supporting the ATS 10. In fig. 10, the ATS10 includes: a base 40 having a spool 44 for manually winding an electric wire 42; and a fixing foot 46. Alternative bases 40', 40 ″ may include a cord retraction assembly with an automatic take-up spool and/or wheels, casters, or rollers (see, e.g., fig. 25). The ATS10 may also include a one-piece handle 48 that extends substantially along the entire width of the ATS10 to allow the ATS10 to be gripped centrally by a single hand or toward opposite sides by both hands. In an alternative embodiment, the base 40 "includes a wire retraction assembly 45" and a single centrally located roller 47 ". With this alternative base, the ATS10 may be tilted forward on the roller 47 ″ and rolled from one position to another using the handle 48.

The ATS10, on the other hand, includes a filter holder assembly 50 that facilitates quick and secure installation and removal of the filter(s). The filter holder assembly 50 of the illustrated embodiment includes: a fastening portion 52; and a plurality of clasps 54, the plurality of clasps 54 disposed on the particulate filter and interacting with structures on the ATS housing 110 to secure the particulate filter in place in the filter housing 112. The buckle 54 may act in a cam-like manner to pull the particulate filter into the filter housing 112 to facilitate and seal air.

Directional terms (e.g., "vertical," "horizontal," "top," "bottom," "upper," "lower," "inner," "inward," "outer," "outward") are used to aid in describing the invention based on the orientation of the embodiments shown in the drawings. The use of directional terms should not be construed to limit the invention to any particular orientation or orientations.

B. General construction

As noted above, the present invention is described in the context of a room air treatment system that performs its general function by operating a fan 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 course screen (prefilter) 100 intended to remove large contaminants such as hair, lint fibers, and large dust agglomerates (e.g., "dust lumps"). The second stage of filtration is a particulate filter 102. Although the specifications of the particulate filter 102 may vary, the illustrated ATS10 includes pleated HEPA filter media that reduces airborne particles as small as 0.009 microns. The third stage of filtration is an activated carbon filter 104, which comprises a bed of granular activated carbon blocks (chips) that have been coated with various catalysts that absorb and convert molecular contaminants, such as formalin, dioxin, and ozone. Carbon filter 104 may be manufactured according to the teachings for "AIR TREATMENT FILTER AND RELATED METHOD" of U.S. patent 7,316,732 to Tayloer, jr. et al, on 8/1/2008, and this document is incorporated herein in its entirety.

In the illustrated embodiment, the various filters 100, 102, 104 fit into a filter housing 112. The filter housing 112 generally includes a carbon filter base and a particulate filter base. The two seats are generally rectangular cavities configured to receive the carbon filter and the particulate filter, respectively. The carbon filter base is slightly smaller in height and width than the particulate filter base. Thus, the filter housing 112 is stepped with a shoulder 114 that surrounds the carbon filter base. The carbon filter 104 is first fitted into the filter housing 112. The outer dimensions of carbon filter 104 are slightly smaller than the dimensions of the portion of filter housing 112 intended to receive carbon filter 104. Accordingly, there is a relatively tight fit between the carbon filter 104 and the filter housing 112, which tends to move air through the carbon filter 104 rather than bypassing the carbon filter 104. Particulate filter 102 is then fitted into filter housing 112. As noted above, filter housing 112 is stepped and includes shoulder 114 against which particulate filter 102 is mounted. Particulate filter 102 may include a face seal (not shown) that engages shoulder 114 to provide a leak-proof seal between particulate filter 102 and filter housing 112. This forces all of the air moving through the ATS10 to flow through the particulate filter 102 rather than bypassing the particulate filter 102. Finally, pre-filter 100 fits into filter housing 112 outside particulate filter 102. In this embodiment, the pre-filter 100 includes a frame 116 and a layer of filter media (not shown). The frame 116 is configured to snap directly onto the particulate filter 102. For example, the frame 116 may include fingers 117, the fingers 117 extending inward and configured to engage a particulate filter frame. Except to the extent described, the pre-filter 100, particulate filter 102, and carbon filter 104 are generally conventional and, therefore, will 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/treatment arrangement.

In this embodiment, the ATS10 includes: untreated air inlets 106a-c in the front section that allow air to enter the system; and an air outlet 108 in the rear portion to return treated air to the environment. The ATS10 includes a fan 56 housed in a lower rear portion of the housing, behind a pre-filter 100, a particulate filter 102, and a carbon filter 104. In operation, the blower 56 operates to draw untreated air from the environment into the ATS10 through the inlets 106a-c, move the air through the three filters 100, 102, and 104 in sequence to treat the air, and then release the treated air through the outlet 108 to return it to the environment. In addition, the size, shape and configuration of the inlet, outlet and internal flow paths are designed to provide a compact footprint for the ATS while still providing quiet and efficient operation. The size, shape and configuration of the inlet, outlet and internal flow paths may vary from application to application as desired.

The illustrated ATS10 is merely exemplary, and the size, shape, and configuration of the ATS may vary with the application.

C. Control system

As noted above, the present invention includes a control system 12 that controls the operation of the ATS10 and provides a user interface for displaying information and receiving input from an operator. The primary functions of the control system 12 are to control the speed at which the ATS10 operates to treat air based on sensed parameters or operator input, track filter usage, inform the operator of the mode, motor speed setting, and filter life, and accept operator commands. Generally, the control system 12 varies the rate of air filtration by adjusting the speed of the fan 56. More specifically, the control system 12 controls operation of the fan 56 based on an automatic or manual control scheme as described in more detail below. The control subsystem 60 may be configured to slowly transition between multiple fan speeds, as desired. For example, in the illustrated embodiment, the fan speed control is achieved by varying a duty cycle of the power supplied to the fan 56. To provide a slow transition between motor speeds, the control subsystem 60 may transition from one speed to another by slowly ramping up or down the duty cycle to move from the current speed to the desired speed. The timing, number and size of steps may vary from application to application depending on the desired effect.

In the illustrated embodiment, the user interface is embodied as a "dead-front" display 16, which is positioned toward the top of the front housing 32 and includes integrally incorporated contact sensors. In use, the display 16 presents information and receives operator inputs relating to the operation and maintenance of the system. For example, the control system 12 of the illustrated embodiment displays the current ambient dust level as well as information regarding 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 varies to provide information and to present available control options at any given time. In the illustrated embodiment, the display 16 includes: in addition to allowing user input, the input display element 18b may also provide information regarding the status of the ATS, such as operating mode and fan speed.

In the illustrated embodiment, the control system 12 includes an electronics module 14 that is self-contained in the sense that it includes all of the electronic components of the ATS10, except for a power supply component that converts AC wall power to DC power required to operate the ATS 10. In this embodiment, a power supply component (not shown) is located in the base 40 of the ATS housing 110. Referring now to the schematic presentation of FIG. 4, electronic 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 includes control circuitry and firmware configured to operate ATS10 and coordinate the collection of data from various other subsystems, including capacitive touch sensor array 64, dust sensor 66, RFID subsystem 68, and wireless communication subsystem 70. Various modes of operation of the system are described in more detail below. The control subsystem 60 also includes non-volatile memory for storing preprogrammed operational presets as well as historical operational data, such as the life of the filters 100, 102, and 104, time of use, counters, and other variables that may be used in association with the operation of the ATS 10.

The electronic module 14 of the illustrated embodiment is shown in fig. 5-7. As shown, the electronic module 14 includes a housing 148 containing circuitry for the control subsystem 60, the RFID subsystem 68, and the wireless communication subsystem 70, as well as the LED array 62, the capacitive touch sensor array 64, and the dust sensor assembly 66. The housing 148 generally includes a base 150 and a cover 152. As noted above, LED array 62 is configured to provide illumination of display elements 18. More specifically, one or more LEDs 62a are positioned behind each display element 18, including an information display element 18a and an input display element 18 b. The LEDs 62a may be selectively illuminated by the control subsystem 60 when appropriate for presenting the information display element 18 or to make the input display element 18b available for input. Each LED 62a may comprise a single LED or a plurality of LEDs that provide various lighting options. For example, each LED 62a may include multiple LEDs of different brightness to allow for variations in the brightness of display element 18. As another example, the individual LEDs 62 may include different color LEDs that may be illuminated separately or in combination to produce different color illumination. In one embodiment, the individual LEDs 62 include red LEDs, green LEDs, and blue LEDs that may be lit in different combinations or at different brightness levels to provide lighting of substantially any desired color. In another example, each LED 62a may comprise a plurality of LEDs of different brightness and different colors. Although the illustrated embodiment includes an LED array 62 to provide illumination of the display 16, the LED array 62 may be replaced or supplemented by 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 unlit 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 element 16 is illuminated, the ATS10 appears to have no user interface. To generate the desired graphic elements, each display element 16 includes a screen 74 that masks and scatters light produced by the underlying LED 62. In the illustrated embodiment, display 16 includes two screens 74a and 74b that each cover a plurality of LEDs and provide shading and light dispersing functionality for a plurality of display elements 18. The screen 74a is associated with an information display element 18a, the information display element 18a providing information regarding the life of the various filters 100, 102 and 104. The screen 74b is associated with an information display element 18a and an input display element 18b, the information display element 18a providing information associated with ambient air quality (e.g., based on dust sensor readings), and the input display element 18b being associated with power, mode, and fan speed inputs. In the illustrated embodiment, each screen 74 is a laminated construction that generally includes a diffuser layer and a shield layer. The diffuser layer can be essentially any material that is capable of dispersing the light generated by the LED. For example, the diffusion layer may comprise a transparent substrate covered with a translucent film or other translucent coating. Alternatively, the diffusion layer may be a transparent material having a "rough" or textured surface. In another alternative, the diffusion layer may be a sheet of translucent material. The obscuring layer can be essentially any material that is capable of obscuring light to produce the desired graphic, including various opaque and translucent materials such as inks, lacquers, films, and other adhesive layers. For example, the masking layer may be a layer of opaque film defining opening(s) in the shape of a desired pattern. It may also comprise a combination of different materials to provide different visual appearances. For example, the masking layer may include: opaque regions 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. By using different colored translucent materials or translucent materials with different levels of transparency, the first and second translucent materials may create regions that appear different. The masking layer may be applied to the diffusion layer by printing, thermal bonding, adhesive or other suitable means. In the illustrated embodiment, the obscuring layer is disposed on the outer surface of the diffuser layer opposite the LEDs or other light sources, but may be disposed elsewhere if desired. Although in the illustrated embodiment the diffuser layer and the masking layer are part of a single laminate construction, they may alternatively be separate components. For example, they may be manufactured separately and placed adjacent to each other during assembly of display 16.

In the illustrated embodiment, the light pipe array 72 has a plurality of individual pipes 72a that are joined side-by-side to contain and direct light from the light source to the corresponding display elements. Each light pipe 72a surrounds the light source and provides a reflective conduit that transmits light from the light source 62a to the appropriate portion of the screen 74a, 74 b. For example, as shown in FIG. 3, one end of each light pipe 72a may be configured to fit closely over the LED 62a, and the other end may engage the screen 74b, and be sized and shaped to follow the perimeter of the associated display element 18. The inner surface of each light pipe 72a may be reflective, diffusive, or have other optical characteristics selected to provide a desired visual appearance to the corresponding display element 18. In the illustrated embodiment, the electronic module 14 includes two light pipe arrays 72 — one for the filter life display and the other for the remaining display elements. In this embodiment, each light pipe array 72 is fabricated as a single, integrally joined unit, thereby facilitating the fabrication and assembly of the electronic module 14. For example, each light pipe array 72 may be injection molded, and the interior surfaces may be coated with a reflective or scattering material depending on the desired appearance.

As noted above, some of the display elements 18 are input display elements 18b, which function as touch sensors to allow an operator to provide inputs to the control subsystem 60. The input display element 18b can be implemented using essentially any touch sensor technology that can be incorporated into a "dead-front" display. In the illustrated embodiment, the input display element 18b is a capacitive touch sensor. In this embodiment, the display 16 includes a capacitive touch sensor array 64 that includes a plurality of individual segments of capacitive film 64. Each membrane segment is associated with a single touch sensor. For example, a segment of each film may be coextensive with the display element 18b associated with the touch sensor. For example, the capacitive film 64 may be integrated into the screens 74a, 74b, e.g., as a separate layer laminated to the diffuser layer 76 and/or the shield layer 78. Alternatively, the capacitive film 64 may be separate from the screens 74a, 74 b. In the illustrated embodiment, each section of capacitive membrane 64 includes a tab 65 or other feature for connecting to the electronic module 14, and the underlying substrate 67 provides a common ground plane. The monitoring, control and operation of the capacitive touch sensor may be generally conventional and will therefore not be described in detail. It is simply noted that the control subsystem 60 may recognize a contact by sequentially reading values from separate capacitive membrane segments and determine that a contact has occurred when those current readings match predetermined values for a typical contact.

As noted above, the electronic 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 a dust sensor 80, a sensor inlet 82, a sensor conduit 81, a sensor outlet 86, and a pair of sensor pads 88. In this embodiment, the dust sensor assembly 66 utilizes a partial vacuum generated by the fan 56 to pull ambient air across the dust sensor 80. After passing through the sensor 80, the air is treated and returned to the environment. As shown, sensor outlet 86 is in communication with the air flow path through ATS10 and is disposed upstream of filters 100, 102, and 104. Sensor 80 is mounted to electronics module 14 in proper alignment with sensor outlet 86. The sensor inlet 82 is placed in the housing 152 of the electronic module 14 to provide a passage for ambient air to enter the sensor conduit 84. The sensor inlet 82 may include a filter material (not shown) selected to avoid large particles (e.g., hair, lint, and dust agglomerates) from fouling the dust sensor 80. The filter material may be replaceable or cleanable. Sensor conduit 84 is disposed between sensor 80 and sensor inlet 82 to provide a flow path to sensor 80. A sensor gasket 88 is located between the dust sensor 80 and the sensor outlet 86, and between the dust sensor 80 and the sensor conduit 84. In operation, the fan 56 pulls air from the environment, sequentially through the sensor inlet 82, the sensor conduit 84, the dust sensor 80, and the sensor outlet 86. The level of dust in the air is measured as it passes through the dust sensor 80 using known techniques and apparatus.

Although not shown, the ATS10 may also include a sensor capable of providing a reading as an indication of the presence or absence of the front cover 32. For example, in the illustrated embodiment, the ATS10 includes a hall effect sensor positioned proximate to one of the magnetic sensors toward the bottom of the ATS 10. The absence of the magnet will change the reading provided by the hall effect sensor when the front cover 32 is removed. Alternatively, a separate interlocking magnet (not shown) may be incorporated into the front cover 32, located proximate to the electronic module 14, such that a hall effect sensor, reed switch, or other magnetic field sensor mounted on the electronic module 14 may be used to determine whether the front cover 32 is present or absent. Information regarding the status of the front cowling 32 can be used by the control subsystem 60 to affect the operation of the system. For example, in one embodiment, the control subsystem 60 may automatically shut down the fan 56 or change functions when the front cover 32 is removed. As another example, when the front cover 32 is removed, the control subsystem 60 may change the parameters used in determining whether a touch has occurred. This will allow the touch sensor to function equally well regardless of whether the front cover 32 is in place. As yet another example, when the front cover 32 is removed, the control subsystem 60 may enter an alternate mode of operation. This may cause control subsystem 60 to change display elements 18, including available input display elements 18 b.

The control system 12 may also include an RFID subsystem 68 configured to work with corresponding RFID tags in replaceable filters (e.g., particulate filter 102 and/or carbon filter 104) in the ATS 10. The RFID subsystem 68 is generally conventional and therefore will not be described in detail. It is simply noted that the control subsystem 60 may collect, accumulate, or store filter life, usage time, elapsed time after installation, total active consumption (i.e., motor speed multiplied by usage time), and other data in the RFID tag via the RFID subsystem 68. When the filter is installed, the RFID reader/writer can read any data that has been stored within the RFID tag, such as the filter lifetime, the amount of time the filter has been installed in any system, and the total effective consumption of filter lifetime. In this way, the system is able to provide adequate tracking even as filters move from one ATS to another. The RFID tag embedded in the filter may also include a serial number, which may be used to ensure the authenticity of the filter. For example, the control system 12 may store a table of valid serial numbers from which to compare the serial numbers, or if it has network capabilities, it has the capability to compare the serial numbers to a table of valid serial numbers stored on the internet. The filter usage information may be used to provide a display of remaining filter life and provide a prompt when the filter needs to be replaced. The RFID subsystem 68 may also be used to determine that the filter has been removed. This information may help control or maintain statistics related to the usage of the ATS 10. For example, the control subsystem 60 may be configured to turn off the blower when the particulate filter 102 and/or the carbon filter 104 are removed. As another example, the control subsystem 60 may enter a service mode when one or both of the filters are removed. While in the service mode, the control subsystem 60 displays information technology information and/or provides control options specific to that mode. To assist in ensuring proper alignment between the RFID reader/writer in the ATS10 and the RFID tag in the carbon filter 104, the carbon filter 104 and the filter housing 112 may be keyed so that the carbon filter 104 can only be mounted in an orientation that provides alignment. 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 system is centered in the left/right direction, the key can be centrally located, as this will be independent of which filter surface is facing inward. When the RFID reader/writer is not centrally located, it may be helpful to provide an asymmetric key arrangement to ensure that the desired filter surface is facing inward.

As noted above, the control system 12 may include a wireless communication subsystem 70 that allows the control subsystem to wirelessly communicate with other electronic devices, such as smartphones, tablets, personal computers, local area wireless routers, broadband wireless routers, and other communication devices. In the illustrated embodiment, wireless communications subsystem 70 allows ATS10 to exchange information with and receive instructions from a remote device, such as a smart phone or tablet device running a proprietary application process. For example, an application may be provided that allows an operator to enter an ATS command on the electronic device, which communicates wirelessly to the control subsystem 60 and is executed by the control subsystem 60. As another example, information collected by the ATS10 may be communicated to the electronic device for display within the application. With respect to the illustrated embodiment, this may include filter life information for each filter, operating mode information, motor speed information, and ambient air quality information using a dust sensor. The wireless communication subsystem 70 may employ substantially any wireless communication technology and protocol. For example, in the illustrated embodiment, the wireless communication subsystem 70 may have Bluetooth and/or WiFi capabilities.

Control system 12 may be configured to implement a variety of control schemes. In each case, the control system 12 may be 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 operating mode and values of monitored parameters). In the illustrated embodiment, the control system 12 implements a control scheme having four general modes of operation, including: a "smart" mode (or automatic mode) in which the control system is automated based at least in part on dust sensor readings; a "manual" mode, in which the operator controls the fan speed; a "turbo" mode, in which the fan 56 is temporarily operated at high speed; and a "night" mode, in which display 16 operates differently to limit night lighting. In connection with this control scheme, the display 16 is capable of displaying various information display elements 18a as well as input display elements 18b (see fig. 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 (e.g., a darker LED or a first color, such as a softer color) in a "show" state. This illuminated state is used to make the display elements 18 on the display 16 visible while providing a visual indication that they have not been selected or are inactive. The other LED is used to illuminate the display element in the "on" state (e.g., a brighter LED or a second color, such as a more vivid color). The "on" state is used to indicate that the display element is "on" or "active". The number, type, construction, 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 element 18a includes: an information display element 200 that exhibits pre-filter life; a set of information display elements 202 that exhibit particulate filter life; a set of information display elements 204 that exhibit carbon filter life; and a set of information display elements 206 that exhibit ambient dust levels (see fig. 9B). The input display elements 18B generally include a power input display element 208, a "smart" mode input display element 210, a "turbine" mode input display element 212, a "night" mode input display element 214, and a plurality of fan speed input display elements 216 (see FIG. 9B).

In the illustrated embodiment, various filter life displays 200, 202, and 204 are interposed between the front cover 32 and the iconic representation of the ATS housing 110 (see fig. 9B). These icons may help identify which filter life displays are associated with which filters. In the illustrated embodiment, the front cover and ATS enclosure icons are statically lit by a white LED operating at 50% brightness.

In the illustrated embodiment, the filter life display 200 for the prefilter includes an information display element 200, the information display element 200 being illuminated in a "show" state when the prefilter requires no maintenance, and the information display element 200 being illuminated in an "on" state when the prefilter requires maintenance (e.g., cleaning or replacement). The "show" state may be generated by statically lighting the 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 one-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. In the "show" state, the remaining elements 18a are illuminated to provide a visual reminder of the filter life in quarters. 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 incorporates colored LEDs to help demonstrate filter life as follows:

75-100% life-all four segments lit at 100% brightness as green

50-75% life-the bottom three segments lit at 100% brightness as green and the top segment lit at 50% brightness as white

25-50% Life-bottom segment lit at 100% brightness as amber and top three segments lit at 50% brightness as white

1-10% Life-bottom segment lit at 100% brightness as red and top three segments lit at 50% brightness as white

0% Life-bottom segment flashing red at 100% brightness, top three segments lit white at 50% brightness

In the illustrated embodiment, filter life display 204 for carbon filter 104 is substantially the same as filter life display 202 for particulate filter 120, including four display elements 18a that may be illuminated to an "on" or "on" state using the same methods described above.

In the illustrated embodiment, the dust level display 206 includes a plurality of individual information display elements 18a that may be illuminated in either a "show" or "on" state. When the dust level display 206 is displayed, the number of information display elements 18a that are lit in the "on" state represents the measured dust level, and the other information display elements 18a are lit in the "show" state. This allows the operator to better understand the dust level by comparing the ratio of "on" segments to the total number of segments. In the illustrated embodiment, the dust horizontal segments are grouped into three groups, with a single group of LEDs associated with each group of three segments. Thus, the dust concentration display 206 of the illustrated embodiment has 15 segments, but only six different settings (i.e., 0, 3, 6, 9, 12, and 15 segments). In the illustrated embodiment, the dust concentration display 206 incorporates colored LEDs to assist in identifying the following:

horizontal 1-first segment lit at 100% brightness as green and remaining segments lit at 50% brightness as white

Horizontal 2-first two segments lit at 100% brightness as amber and the remaining segments lit at 50% brightness as white

The horizontal 3-first three segments are lit at 100% brightness as amber and the remaining segments are lit at 50% brightness as white

Horizontal 4-first four segments lit at 100% brightness as red, the remaining segments lit at 50% brightness as white

Horizontal 5-all five segments light up to red at 100% brightness

In this embodiment, the fan speed display element 18b performs the dual function of displaying the current fan speed and receiving touch sensor input to allow an operator to manually set the fan speed. As with the dust level display, the fan speed display includes a plurality of individual display elements 18 having two LEDs that are selectively illuminated to indicate a "show" state or an "on" state. Unlike the dust level display, the fan speed display is also a touch sensor array that can be used by an operator to manually select the fan speed. When displaying the fan speed, the number of fan speed input display elements that are illuminated in the "on" state is selected to represent the fan speed, and the other fan speed input display elements are illuminated in the "show" state so that the operator can see the available fan speed options and compare the ratio of the "on" segment to the "show" segment for the current fan speed. In the illustrated embodiment, the "show" state may be provided by statically lighting a white LED at 50% brightness. The "on" state may be provided by statically lighting the blue LED at 100% brightness. To provide a touch sensor, each fan speed display element 18b includes a segment of an associated capacitive film. As noted above, the control subsystem 60 monitors the capacitive membrane segments to determine when a touch has occurred. When a touch occurs, the control subsystem 60 may adjust the fan speed to conform to the selected setting.

In the illustrated embodiment, power input display element 208 is illuminated red at 100% brightness when in the "show" state and white at 100% brightness when in the "on" state. When in the "show" state, the "smart" mode input display element 210 is illuminated at 50% brightness as white, and when in the "on" state, is illuminated at 100% brightness as blue. When in the "show" state, the "turbo" (turbo) mode input display element 212 is lit at 50% brightness as white, and when in the "on" state, is lit at 100% brightness as blue. The "night" (night) mode input display element 214 is lit at 50% brightness as white when in the "show" state and is lit at 50% brightness as red when in the "on" state.

As noted above, the control system 12 of the illustrated embodiment implements a control scheme with four different modes of operation: "smart" mode (or automatic mode), "manual" mode, "turbo" mode, and "night" mode. This control scheme will be described with reference to fig. 13. During the "smart" mode of operation, the control subsystem 60 evaluates the dust sensor readings and determines the fan speed based on these readings. This allows the ATS10 to adapt to the level of airborne dust in a fluctuating environment. In this mode, the operator has the option of entering turbine mode, night mode, manual mode, or turning off the ATS power supply. Thus, the turbine mode input display element, the night mode input display element, the various fan speed input display elements, and the power input display element are illuminated. The turbine mode input display element and the night mode input display element are illuminated as a "show" state. The smart mode input display element and the power input display element are illuminated to an "on" state. When the system is already operating in the smart mode, if the smart mode input display element is touched, the system will switch to the manual operation mode. The fan speed input display element is illuminated according to the illumination method set forth above to show the current fan speed and the available manual adjustment options. Further, in the smart mode, the dust level information display element is lit according to the lighting method set forth above to show the real-time dust level. In the smart mode, the filter life display lights up for a particular time each time the user interacts with the ATS 10. For example, each time the operator interacts with a touch sensor in display 16, control subsystem 60 may illuminate the filter life display for a 15 second period. Further, the filter life display may be illuminated whenever and whenever a filter requires attention (e.g., any one filter needs to be cleaned or replaced).

When the operator touches the fan speed input display element 18b, the control subsystem enters a manual mode (or direct mode). Once in the manual mode, the control subsystem 60 operates the fan 56 at the speed selected by the operator. In this mode, the operator has the following options: entering a turbine mode, a night mode, an intelligent mode, adjusting fan speed, or turning off ATS power. Thus, the turbine mode input display element, the night mode input display element, the smart mode input display element, the various fan speed input display elements, and the power input display element 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 "show" state. The power input display element is illuminated in an "on" state. The fan speed input display element is illuminated to display the current fan speed and available manual adjustment options according to the illumination method set forth above. Further, the dust level information display element is lit to display the real-time dust level according to the lighting method set forth above. In this mode, each time a user interacts with the ATS10, the filter life display lights up for a particular time. For example, each time the operator interacts with a touch sensor in display 16, control subsystem 60 may illuminate the filter life display for a period of 15 seconds. Further, the filter life display may be illuminated whenever and whenever a filter requires attention (e.g., any one filter needs to be cleaned or replaced).

When the operator touches the turbo mode input display element, turbo mode is entered. Once in the turbo mode, the control subsystem 60 operates the fan 56 at the highest speed setting (or some other predetermined speed setting) for a preset time (e.g., 30 minutes), and then automatically returns to the previous mode of operation. The turbo mode may be interrupted by a key touch, wherein the system may transition out of the turbo mode before the default time expires. In this mode, the operator has the following options: touching the smart mode input display element to enter a smart mode, touching the fan speed input display element to adjust the fan speed, and entering a manual mode or touching the power input display element to turn off the ATS power. Further, the operator has the following options: touching the turbo mode input display element causes the system to immediately return to the previous setting. Thus, the turbo mode input display element, the smart mode input display element, the various fan speed input display elements, and the power input display element are illuminated. The turbine mode input display element and the power input display element are illuminated in an "on" state, while the smart mode input display element is illuminated in an "show" state. The fan speed input display element is illuminated according to the illumination method described above to display the current fan speed and the available manual adjustment options. Further, the dust level information display element is lit according to the lighting method described above to display the real-time dust level. In this mode, each time a user interacts with the ATS10, the filter life display is illuminated for a particular time. For example, each time the operator interacts with a touch sensor in display 16, control subsystem 60 may cause the filter life display to light up for a period of 15 seconds. Further, the filter life display may be illuminated whenever and as long as the filter requires attention.

When the operator touches the night mode input display element, the night mode is entered. Once in the night mode, the control subsystem 60 continues to operate the ATS10 in the same mode, but with the display reduced to minimize light emission. In this mode, the operator has the following options: the ATS is turned off by touching the night mode input display element to cancel the night mode (i.e., re-enable the display appropriate for the current mode of operation), or by touching the power input display element. In the night mode, only the night mode input display element and the power input display element are illuminated, and both are illuminated in an "on" state. In alternative embodiments, control subsystem 60 may be configured to: when the operator approaches close proximity to the display 16, the display 16 is reactivated (in whole or in part). For example, the control subsystem 60 may use the capacitive touch sensor array 64 to sense the approach of the operator and use it as a trigger to illuminate all of the input display elements 18b so that the operator has complete control. If the operator does not enter a command within a specified time (e.g., 15 seconds) after display 16 has been re-enabled, control subsystem 60 may return display 16 to the night mode.

When the ATS10 is plugged in but not powered on, the control subsystem 60 causes the power input display element to light up in the "show" state. This allows the operator to see the power control elements. Once the power button is touched, the control subsystem 60 may cause the system to start in either the smart mode or the manual mode. When started in the manual mode, the control subsystem 60 takes dust sensor readings, determines an appropriate fan speed based on the dust sensor readings, and then loads the fan at the determined speed. All of these steps are performed automatically, without operator input. When activated in the manual mode, the control subsystem 60 does not activate the fan 56 until instructed to do so by an operator input (e.g., by the operator touching one of the fan speed input display elements 18 b).

The control schemes described above are merely exemplary. Control system 12 may implement a variety of alternative control schemes. For example, one alternative control scheme is shown in FIG. 14. This alternative control scheme is substantially the same as the control scheme discussed above, except as described herein. To implement this control scheme, the display may include additional mode control buttons (labeled "user" in FIG. 14) associated with a "manual" mode. With this control scheme, the operator needs to use the mode control buttons to switch between different operating modes. For example, the operator needs to touch the "user" mode input display element to enter the manual mode of operation (rather than simply touching the fan speed input display element). Once in the manual mode, the operator may control the fan speed by touching a desired fan speed input display element. As another example of this control scheme, the operator may leave the turbo mode simply by touching the turbo mode input display element or allowing a preset time to elapse. Similarly, the operator may leave the night mode by simply touching the night mode input display element.

Another alternative control scheme is shown in fig. 15. In this embodiment, the control scheme is substantially the same as the first control scheme described above, except as described herein. To implement this control scheme, the display includes an additional mode control button (labeled "options" in FIG. 15) associated with an "options" mode. When the system is powered on, it is in an active "smart" mode and the fan speed is automatically set based on input from the dust sensor. To provide additional control options, the "options" mode button must be touched. In the "smart" mode, the power input display element is illuminated in an "on" state, the smart mode input display element is illuminated in an "on" state, the option mode input display element is illuminated in a "show" state, and the dust level display is illuminated. The turbine mode input display element, the night mode input display element, and the fan speed display are off. In the smart mode, the operator may touch the power input display element to turn off the system power supply or touch the option mode input display element to transition into the option mode.

Once in the "smart" mode, the power input display element is illuminated in an "on" state, the smart mode input display element is illuminated in an "on" state, the option mode input display element is illuminated in an "on" state, and the dust level display and the fan speed display are illuminated. In addition, the turbine mode input display element and the night mode input display element are illuminated in a "show" state. In the option mode, the operator may touch the power input display element to turn off system power, touch the smart mode input display element to return to the smart mode, touch the option mode input display element to return to the smart mode, touch the turbine mode input display element to enter the turbine mode, touch the night mode input display element to enter the night mode, or touch the fan speed input display element to select fan speed and enter the manual mode. If no button is touched within a certain time (e.g., 60 seconds), the system may automatically revert to the smart mode.

Once in the "manual" mode, the power input display element is illuminated in the "on" state, the option mode input display element is illuminated in the "show" state, the dust level display is illuminated and the fan speed display is illuminated. In addition, the smart mode input display element, the turbo mode input display element, and the night mode input display element are turned off. In the manual mode, the operator may touch the power input display element to turn off the system power, touch the option mode input display element to enter a "manual option" mode, or touch the fan speed input display element to select the fan speed. While the system remains in manual mode, it will continue to operate the fan at the speed selected by the operator.

Once in the "manual option" mode, the power input display element and option mode input display element are illuminated in an "on" state, and the dust level display and fan speed display are illuminated. In addition, the smart mode input display element, the turbo mode input display element, and the night mode input display element are illuminated in a "show" state. In the manual mode, the operator may touch the power input display element to turn off the system power, touch the smart mode input display element to return to the smart mode, touch the option mode input display element to return to the manual mode, touch the turbine mode input display element to enter the turbine mode, touch the night mode input display element to enter the night mode, or touch the fan speed input display element to select the fan speed and return to the manual mode. If no button is touched within a certain time (e.g., 60 seconds), the system may automatically revert to the smart mode. If no button is touched within a certain time (e.g., 60 seconds), the system may automatically revert to manual mode.

Once in the "turbo" mode, the control subsystem operates the fan at the highest speed setting (or some other predetermined speed setting) for a predetermined time (e.g., 30 seconds), and then automatically returns to the previous mode of operation. The turbo mode may also be interrupted by a key touch, in which case the system may transition out of turbo mode before the default time expires. The turbine mode input display element and the power input display element are illuminated in an "on" state. The fan speed display and the dust level display are also illuminated. In addition, the smart mode input display element, the option mode input display element, and the night mode input display element are off. In this mode, the operator has the following options: touching the turbine mode input display element to return to a previous mode of operation, or touching the power input display element to turn off the ATS power supply.

Once in the "night" mode, the control subsystem continues to operate the ATS in the same operating mode, but with reduced display to minimize light emission. In the night mode, the night mode input display element is illuminated in a "show" state and the power input display element is illuminated in an "on" state. The remaining display elements are turned off. In this mode, the operator has the following options: the night mode is deactivated (i.e., display according to the current operation mode is re-enabled) by touching the night mode input display element or the ATS is turned off by touching the power input display element.

D. Front cover

As described above, the ATS10 includes a removable front cover 32, the front cover 32 closing the front of the ATS10, encasing the filters 100, 102, and 104 as well as the electronic module 14 and the fan 56. The front cowl 32 of the illustrated embodiment defines a central inlet 106a and is offset from the ATS housing 110 such that they cooperatively define side inlets 106 b-c. The inlet corrector 98 may fit into the central inlet 106 a. In the illustrated embodiment, the front cover 32 is convex, creating a relatively large head space between the rear surface of the front cover 32 and the installed filter. This may allow air to enter the ATS10 more freely through the central inlet 106 a.

In this embodiment, the front cover 32 also forms an interface surface for the "dead-front" display 16. In this manner, the front cover 32 of this embodiment is translucent (e.g., not completely transparent or not completely transparent with respect to visible light) at least in the area of the electronic module 14 covering the LED array 62, the light pipe array 72, and the screens 74a and 74 b. The front cover 32 may be made of a translucent polymer (e.g., molded thermoplastic) having a paint or film coating that provides the desired opacity. In one embodiment, the front cover 32 is wrapped by an in-mold film process. To promote a proper appearance of a "dead-front" display, careful control of the paint or film coating applied to the front cover 32 may be required. Alternatively, the front cover 32 may be made of 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 a mechanical attachment point at its top, and a pair of magnetic attachment points at its bottom. In the illustrated embodiment, the mechanical attachment points are registered (registers) on the electronic module 14. This helps ensure proper alignment between the front cover 32 and the components of the underlying display 16, which can help ensure proper appearance and operation of a "dead-front" display. Although the mechanical attachment point is not registered with the electronic module 14 in the illustrated embodiment, it may be misaligned with other structures in alternative embodiments.

Referring now to fig. 19A and 19B, the mechanical attachment point of the illustrated embodiment includes a lip 36 extending from the front case 32 and configured to snap onto the electronic module 14. In the illustrated embodiment, the lip 36 extends substantially the entire width of the electronic module 14, except that it may include a gap 37 (see FIG. 2) that is aligned with the dust sensor inlet 82. The lip 36 of this embodiment is oriented at an angle that allows the lip 36 to snap onto the electronic module 14 when the front cover 32 is put into place. This allows the front cowling 32 to be disengaged from the ATS housing 110 by sliding the front cowling 32 upward relative to the ATS housing 110. This sliding up action not only disengages the lip 36 from the electronic module 14, but also simultaneously disengages the magnet 90 from the attachment plate 92 in the ATS housing 110 (as discussed below), thus facilitating removal. The size, shape, and configuration of the lip 36 may vary with the application. In alternative embodiments, the lip may be substantially replaced by any other male or female structure capable of engaging with the electronic module 14.

In this embodiment, the front cover 32 includes two magnetic attachment point locations toward opposite sides of the bottom of the front cover 32. Each magnetic attachment point includes a magnet 90 carried by the front cover 32 and a magnetically attractive plate 92 to which the ATS housing 110 is mounted (see fig. 20A and 20B). The magnets 90 may be disk-shaped rare earth magnets that fit into corresponding receptacles 94 that project from the rear of the front cover 32. The plate 92 may be sized and shaped such that: when the front cover 32 is slid upward a sufficient distance to clear the lip 36 from the electronic module 14, the magnets 90 are generally disengaged from the plate 92. 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 sufficient distance to clear the lip 36 from the electronic module 14, and then the top of the front cover 32 is tilted away from the ATS housing 110 to overcome any remaining magnetic attraction at the magnetic attachment point. The front cover may be installed using a substantially reverse process. Another option for removing the filter is shown in fig. 17B. With this option, the operator extends down and pulls the bottom of the front cowling 32 away from the ATS housing 110 until the magnet 90 disengages from the plate 92. The operator then lifts the front cover 32a sufficient distance to clear the lip 36 from the electronic module 14. The front cover 32 may be mounted by: the top of the front cover 32 is draped over the electronic module 14 and then the bottom of the front cover 32 is swung out toward the ATS housing 110 until the magnet 90 engages the plate 92.

The front cover 32 may include interlocking magnets (not shown) that allow the control subsystem 60 to be identified when the front cover 32 is installed and when its front cover 32 is removed. The interlock magnet may be placed toward the top of the front case 32 where it may be sensed by a hall effect or other magnetic field sensor incorporated into the electronics module 14. As an alternative to using separate interlocking magnets, the ATS10 may include a hall effect sensor (or other magnetic field sensor) positioned to allow it to identify the presence or absence of the front cover based on the magnet 90 used to attach the front cover 32 to the ATS housing 110.

If desired, the electronic module 14 may include LEDs or other light sources that may be engaged to provide illumination that is visible through the central inlet aperture 106a and/or at the sides of the front cover 32. This illumination may be provided as accent lighting (accent lighting), or may have a functional purpose. For example, when ATS10 is functioning properly and requires no maintenance, control system 12 may provide blue illumination or no illumination, and when operator intervention is required, it may provide red illumination. This can occur when the filter needs to be replaced or cleaned or there is a system error. The red illumination may flash when there is a particular emergency event.

As noted above, the front cover 32 incorporates an appropriate level of opacity to create a "dead-front" display 16. Alternatively, a "dead-front" display may be created by a transparent component (e.g., a separate panel disposed on the electronic module 14) disposed below the front cover 32. In such embodiments, the front cover 32 may be transparent or sufficiently translucent to allow an underlying "dead-front" display to be visible through the front cover 32.

E. Mobility features

In the illustrated embodiment, the ATS10 may be configured to interface with one of a plurality of interchangeable bases 40. In the illustrated embodiment, the bases 40, 40', and 40 "are secured to the ATS housing 110 using bolts or other fasteners. The number and location of fasteners may vary depending on the application. Alternatively or in addition to fasteners, the ATS housing 110 and the bases 40, 40', and 40 ″ may be provided with snap features that allow the desired base to be snap fit onto the ATS 10.

Different pedestals 40 may provide different configurations for receiving the power line 42 and/or different configurations for supporting the ATS 10. The ATS10 with three alternative pedestals 40, 40' and 40 "is shown in fig. 21 and 22. Generally, the base 40 has a winding reel 44 for manually winding the electric wire 42', and a plurality of fixing feet 46; the base 40 'has a reel 44' for manually winding the power line 42', and a plurality of casters 46'; and base 40 "includes wire recovery assembly 45 with an automatic take-up reel (not shown) and a combination of fixed feet 46" and rollers 47 ". Although the figures show embodiments of the spool extending laterally across a portion of the ATS housing 110, the term "spool" is intended to include any individual feature or combination of features provided as a structure onto which the power cord 42 may be wound.

In the illustrated embodiment, the ATS10 may also include a handle 48 disposed at the top rear of the ATS housing 110. The handle 48 of this embodiment extends substantially along the entire width of the ATS10 to allow the ATS10 to be gripped in the center by one hand or toward the opposite side by both hands. In this embodiment, the handle 48 may include: a relatively deep central pocket portion of sufficient depth to receive up to about two knuckles of an operator's finger; and a relatively shallow side pocket deep enough to receive an operator's finger up to about the first knuckle. The handle 48 may be a one-piece member that is secured to the ATS housing 110, such as by fasteners, or it may be integrally formed with other portions of the ATS housing 110.

With respect to the base 40, the handle 48 may be used to lift the ATS10 as the ATS10 is moved from place to place. With respect to the base 40', the handle may be used to grasp the ATS when the ATS is to be slid from place to place with casters 46'. With respect to the base 40', the handle 48' may be used to tilt the ATS10 forward onto the roller 47' and slide the ATS10 from one location to another.

F. Filter retainer assembly

As described above, ATS10 includes pre-filter 100, particulate filter 102, and carbon filter 104 removably fitted into filter housing 112. The system includes a filter holder assembly 50 that facilitates quick and robust filter installation and removal. In the illustrated embodiment, the filter holder assembly 50 includes a clasp 52 and a pair of clasps 54 integrally incorporated into the frame of the particulate filter 102, and a locking tab 126 integrally incorporated into the ATS housing 110. Because the pre-filter is secured to the particulate filter 102 and the particulate filter 102 covers the carbon filter 104, the filter holder assembly 50 effectively holds all three filters 100, 102, and 104. In the illustrated embodiment, buckle 54 is configured such that: when they are closed, they draw particulate filter 102 tightly into filter housing 112. This helps to compress face seal 118 on particulate filter 102 against shoulder 114 to facilitate an air-tight seal.

Referring now to fig. 29B, the clasp 52 is disposed at the bottom center of the frame of the particulate filter 102. The clasp 52 of this embodiment is molded integrally with the frame of the particulate filter 102, but alternatively it may be separately formed and attached to the frame. The snap-fit portions 52 of the illustrated embodiment have a quarter-circle cross-section, which may facilitate installation and removal from corresponding voids 120 in the filter housing 112. The number, size, shape, and configuration of the snaps 52 and voids 120 may vary from application to application as desired. For example, the locations of the catches 52 and voids 120 may be reversed, with the catches extending from the filter housing 122 and the voids being defined in the particulate filter 102.

As perhaps best shown in fig. 29A and 29B, the clasps 54 are rotatably mounted to opposite sides of the frame of the particulate filter 102. Each of the clasps 54 may include a handle 122 and a hook 124. Handle 122 is configured to provide a structure that can be used by an operator to rotate buckle 54. Hook 124 is configured to engage locking projection 126 when clasp 54 is rotated into the closed position. The hook 124 and the locking projection 126 are configured such that: when the buckle 54 approaches the closed position, there is a short distance (intersection) between the two. This creates a snap fit that helps ensure that the buckle 54 is secured in the closed position. Further movement toward the closed position causes the hook 124 to flex, creating resistance to further movement toward the closed position. As clasp 54 continues toward the closed position, hook 124 leaves the intersection area and begins to return to its original unbent state. This pushes buckle 54 the remainder of the way into the closed position. In the illustrated embodiment, the location and configuration of the hook 124 relative to the pivot location is selected such that the clasp 54 provides a cam-like function that draws the particulate filter 102 into the filter housing 112 when the clasp 54 is closed. The operation of buckle 54 is shown in fig. 30A-D. In fig. 30A, buckle 54 is shown in an open position. In this position, the hook 124 is disengaged from the locking tab 126. Fig. 30B shows buckle 54 in a partially closed position. As can be seen, the hook 124 has moved into engagement with the locking tab 126. In this position, particulate filter 102 has been partially drawn into filter housing 112, as can be seen by comparison to reference line R. Fig. 30C shows buckle 54 moved further toward the closed position. In this view, the hook 124 has engaged the locking tab 126 and has begun to flex outwardly away from the locking tab 126 due to the intersection therebetween. As can be seen, particulate filter 102 has been pulled further into filter housing 112. In fig. 30D, clasp 54 is in the closed position. In this position, the hook 124 has moved beyond the intersection zone and fully engaged the locking tab 126. Particulate filter 102 has been fully drawn into filter housing 112.

The removal of the particulate filter 102 is described in connection with fig. 28A-D. In the first illustration, the front cover 32 and pre-filter 100 are removed to provide access to the particulate filter 102 (see fig. 28A). In the illustrated embodiment, the pre-filter 100 does not need to be removed from the particulate filter 102. In the next illustration, each clasp 54 has been rotated from a closed position to an open position (see fig. 28B). This disengages the hook 124 from the locking tab 126 in the filter housing 112. The next illustration shows the top of the particulate filter 102 tilted away from the filter housing 112 (see fig. 28C). The final illustration shows the filter 102 lifted from the filter housing 112 to disengage the catch 52 from the void 120 (see fig. 28D). The particulate filter 102 may be installed using a substantially reverse process.

The design and construction of the buckle may vary depending on the application. Alternative fasteners 54' and 54 "are shown in fig. 31A-D and 32A-D. In these alternative embodiments, the filter holder assembly further includes locking pins 128', 128 "that secure the clasps 54', 54" in the closed position. The locking pins 128', 128 "project from the particulate filter 102, but may alternatively project from the filter housing 112 if desired. Alternative buckle 54' includes teeth 130' that project from an outer edge of buckle 54 '. Teeth 130 'are configured to engage corresponding recesses 132' in locking pin 128 'when buckle 54' is in the closed position. Teeth 130' and locking pin 128' together snap lock buckle 54' in the closed position. Operation of buckle 54' is illustrated with reference to fig. 31A-D. In fig. 31A, buckle 54' is shown in the open position. In this position, the hook 124 'is disengaged from the locking tab 126'. Fig. 31B shows buckle 54 in a partially closed position. As can be seen, the hook 124 'has moved into engagement with the locking tab 126'. In this position, particulate filter 102 has been partially drawn into filter housing 112, as can be seen by comparing to reference line R. Fig. 31C shows clip 54' moved further toward the closed position. In this view, hook 124 'has further engaged locking tab 126' and pulled filter 102 further into filter housing 112. In fig. 31D, clasp 54' is in the closed position. In this position, teeth 130 'have become seated in recesses 132', and particulate filter 102 has been fully drawn into filter housing 112. The interaction between teeth 130' and locking pin 128' helps secure buckle 54' in the closed position.

Alternative buckle 54 'is similar to buckle 54'. In this embodiment, buckle 54 "includes a series of contours that interact with locking pin 128 'to control the movement and feel of buckle 54'. More specifically, buckle 54 "includes a stop 134" and a seat 136 "configured to engage locking pin 128" when buckle 54 "is in the open or closed position. The stop 134 "is configured to engage the locking pin 128" when the buckle 54 "is in the fully open position. The stop 134 "helps to limit the range of motion of the buckle 54". The seat 136 "is configured to interlock with the locking pin 128" when the buckle 54 "is in the fully closed position. The front edge of seat 136 "may be raised to create a snap-fit interaction when buckle 54" is closed or opened. The operation of buckle 54 "will now be described with reference to fig. 32A-D. In fig. 32A, buckle 54 "is shown in the open position. In this position, the hook 124 "is disengaged from the locking projection 126" and the stop 134 "is disengaged from the locking pin 128". Fig. 32B shows buckle 54 "in a partially closed position. Hook 124 "has been moved into engagement with locking tab 126". In this position, particulate filter 102 has been partially drawn into filter housing 112, as can be seen by comparison to reference line R. Fig. 32C shows clip 54 "moved further toward the closed position. In this view, hook 124 "has further engaged locking tab 126" and pulls filter 102 further into filter housing 112. In addition, the leading edge of the seat 136 "has begun to engage the locking pin 128". In fig. 32D, clasp 54 "is in the closed position. In this position, locking pin 128 "and seat 136" are fully engaged and particulate filter 102 has been fully drawn into filter housing 112. The relationship between locking pin 128 "and seat 136" helps secure buckle 54' in the closed position.

G. Alternative embodiments

The invention is capable of many alternative embodiments and of being practiced or being carried out in various ways. For example, an alternative embodiment is shown in FIGS. 33A-53D. This alternative embodiment is substantially the same as the embodiment shown above in fig. 1A-20B, except as described below or shown in the drawings. For ease of disclosure, this alternative embodiment will be described with the same reference numerals as those used in association with ATS10, except that the numeral "4" is added to the top. For example, the alternative ATS is designated with reference numeral 410 (similar to ATS 10), and the ATS housing of the alternative ATS is designated with reference numeral 4110 (similar to ATS housing 110).

Referring now to fig. 33A, 33B, and 34, ATS410 generally includes a housing assembly that houses a control system 412, a fan 456, a pre-filter 4100, a particulate filter 4102, and an activated carbon filter 4104. The ATS410 includes: at the front untreated air inlets 4106a-c, untreated air is drawn into the system through the untreated air inlets 4106 a-c; and an air outlet 4108 at the rear end through which 4108 the treated air is returned to the environment (see fig. 44). In operation, the control system 412 operates the blower 456 to draw untreated air into the ATS410 through the inlets 4106a-c, move the untreated air sequentially through the three filters 4100, 4102, and 4104, and then discharge the treated air through the outlet 4108. The size, shape and configuration of the inlet, outlet and internal flow paths 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 a top housing 4113. The main housing 4110 mainly forms the rear, sides, and bottom of the ATS 410. As with the ATS10, a filter housing 4112 is attached to the main housing 4110 to enclose the front of the ATS410 and provide a seat for the particulate filter 4102 and the carbon filter 4104. Or as best shown in fig. 49, the top housing 4113 is attached to the rear side of the filter housing 4112, e.g., by bolts (not shown). The top housing 4113 includes an integral handle 448. In this embodiment, the handle 448 includes: a central section that can be grasped by a single hand; and a pair of side sections that can be grasped together with both hands. In the illustrated embodiment, the main housing 4110 includes a cord reel 444 (or spool) for manually winding a power cord (not shown) (see fig. 33B). In this embodiment, the cord reel 444 includes a pair of fingers 445 spaced on opposite sides of the power cord input port 447. The size, shape, and configuration of the fingers 445 may vary, for example, depending on the characteristics of the power cord. As shown, the cord reel 444 may be placed in a recess in the main housing 4110 so that it does not bulge out and thus does not increase the profile of the ATS 410.

The ATS410 includes a removable front cover 432 that closes the front of the ATS410, covering the display 416 and filters 4100, 4102, and 4104. As can be seen in the various figures (e.g., fig. 33a, 44, and 46), the front housing 432 defines a central inlet 4106a and is spaced apart from the filter housing 4112 such that the front housing 432 and the filter housing 4112 cooperatively define side inlets 410 b-c. The illustrated front cover 432 is made of an opaque plastic material, for example, by injection molding. Alternatively, front housing 432 may be fabricated from a wide range of alternative materials. In this embodiment, the front housing 432 includes a window 433, the window 433 covering the display 416. The windows 433 fit into corresponding openings 435 defined in the front cover 432. To hide unlit display elements, the window 433 of this embodiment is translucent at least in one or more areas overlying the display element 418. The window 433 can be made of a translucent polymer (e.g., molded thermoplastic) having a paint or film coating that provides the desired opacity. In one embodiment, the window 433 is covered by an in-mold film process. To promote a proper appearance of a "dead-front" display, careful control of the paint or film coating applied to the window 433 may be required. Alternatively, window 433 may be made of a translucent material, such as a molded translucent thermoplastic.

In the illustrated embodiment, the front cover 432 is configured to allow one-handed removal and installation. Front housing 432 includes a mechanical attachment point at the top and a pair of magnetic attachment points at the bottom. Referring now to fig. 45A, 45B, and 46, the mechanical attachment points of the illustrated embodiment include a catch 436 (or lip) that extends from the front cover 432 and is configured to fit in a seat 437 in the electronic module 414, or in a configuration around the electronic module 414. The catch 436 may be separately manufactured and attached to the front cover 432 (see fig. 46), or it may be integrally formed with the front cover 432 (not shown). The catch 436 of this embodiment is oriented at an angle that allows the catch 436 to remain in the seat 437 when the front cover 32 is closed. This allows the front shroud 432 to disengage from the ATS housing 4110 by sliding upward relative to the ATS housing 4110. This upward sliding action not only disengages the catch 436 from the seat 437, but may also simultaneously disengage the magnet 490 from the attachment plate 492 in the ATS housing 4110 (as discussed below), thereby facilitating removal. The size, shape, and configuration of the catch 436 may vary from application to application. In alternative embodiments, the catch 436 may be replaced by substantially any male or female configuration capable of engaging the socket 437 or other similar configurations within or around the electronics module 414.

The front cover 432 of this embodiment includes two magnetic attachment point locations toward opposite sides of the bottom of the front cover 432. Each magnetic attachment point includes a magnet 490 carried by the front housing 432 and an attraction plate 492 (see fig. 48) mounting the ATS housing 4110. The magnet 490 may be a disk-shaped rare earth magnet that is mounted in a corresponding receptacle 494 that projects from the rear of the front cover 432. In this embodiment, the plate 492 is configured to perform two functions — that is, (i) to provide a magnetically attractive structure for the magnet 490 and (ii) to rotatably support the drum 447. In this embodiment, each plate 492 is generally L-shaped having a first leg 493 positioned to receive a magnet 490 and a second leg 495 that rotatably supports the roller 447. The first leg 493 and the second leg 495 are substantially planar, but may include ridges or other contours to improve strength or to interfit with adjacent components of the ATS 410. The first leg 493 includes a pair of mounting tabs 491 that extend rearwardly and allow the plate 492 to be attached to the housing 4110, for example, by bolts (not shown). The second leg 495 defines a circular opening 497 configured to rotatably receive a shaft (or axle) of the drum 447. In use, the two plates 492 catch (trap) opposite ends of the shaft or spindle of the drum 447. In this embodiment, the plate 492 is stamped from sheet material and configured to facilitate left or right handed operation, such that the same plate 492 may be used on opposite sides of the ATS410 by simply turning the plate 180 degrees. For example, the mounting tabs 491 may be vertically centered, and each tab 491 may be equidistantly spaced from a corresponding end of the first leg 493. Further, a circular opening 497 may be vertically located on 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 (discussed in more detail below). This eliminates the need for any interlocking magnets or magnetic field sensors (as discussed above in connection with ATS 10) to determine the presence of the front cover.

As described above, the ATS10 includes the pre-filter 4100, the particulate filter 4102, and the carbon filter 4104. Similar to ATS10, the filter is secured within ATS410 by a filter holder assembly 450 incorporated into the particulate filter 4102. More specifically, the filter is installed by: fitting the carbon filter 4104 into a filter holder in the filter housing 4112, fitting the particulate filter 4102 into a filter holder in the filter housing 4112, securing the particulate filter 4102 using the filter holder assembly 450 over the carbon filter 4104, and attaching the pre-filter 4100 to the particulate filter 4102. In this embodiment, the filter holder assembly 450 is somewhat different from the filter holder assembly 50 discussed above in connection with the ATS 10. In this embodiment, the particulate filter 4102 is held at the bottom by catches 452, the catches 452 fit into voids 4120 in the filter housing 4112, and the top is held by buckles 454 (or latches) that interlock with locking tabs 4126 extending from the filter housing 4112. Fig. 52A-D illustrate the process of removing the particulate filter 4102 from the ATS 410. Fig. 52A shows the particulate filter 4102 installed with the buckle 454 in the closed position. Fig. 52B shows the installed particulate filter 4102 with the buckle 454 rotated into an open position. Fig. 52C shows the top of the particulate filter 4102 tilted away from the ATS 410. The tilting action of the filter 4102 also disengages (or mostly disengages) the catch 452 from the gap 4120. Fig. 52D shows the particulate filter 4102 removed from the ATS 410. In the illustrated embodiment, the buckle 454 is configured to draw the particulate filter 4102 tightly into the filter housing 4112 when it is closed. This facilitates a face seal (not shown) that compresses the particulate filter 4102 against the shoulder 4114 to facilitate a hermetic seal.

Referring now to fig. 51A-C, the clasp 452 is disposed at the bottom center of the frame of the particulate filter 102. The clasp portion 452 of this embodiment is integrally molded with the frame of the particulate filter 4102, but it may alternatively be formed separately and attached to the frame. The snap portions 452 of the illustrated embodiment have a quarter-circular cross-section that can facilitate installation and removal from corresponding voids 4120 in the filter housing 4112. The number, size, shape, and configuration of the catches 452 and voids 4120 may vary from application to application as desired.

In this embodiment, the buckle 454 is rotatably mounted near the top center of the frame of the particulate filter 4102. Buckle 454 includes a handle 4122, a tooth 4130, and a hook 4124. The teeth 4130 are configured to engage the locking pin 4128 as the catch 454 is rotated into the closed position. More specifically, the engagement between teeth 4130 and locking pin 4128 causes buckle 454 to snap lock into the closed position. Further, the hook 4124 is configured to engage the locking projection 4126 when the catch 454 is rotated into the closed position. In the illustrated embodiment, the location and configuration of the hooks 4124 and locking tabs 4126 are selected such that the buckle 454 provides a cam-like function that draws the particulate filter 4102 into the filter housing 4112 when the buckle 454 is closed. The operation of buckle 454 is shown in fig. 53A-D. In fig. 53A, buckle 454 is shown in an open position with hooks 4124 disengaged from locking tabs 4126. Fig. 53B shows buckle 454 rotated clockwise into a partially closed position. Fig. 53C shows buckle 454 rotated further clockwise into a position in which tooth 4130 is about to engage locking pin 4128. Finally, fig. 53D shows buckle 454 in the closed position. As can be seen, tooth 4130 has moved beyond locking pin 4128 and now resists movement of buckle 454 out of the closed/locked position. In addition, the hooks 4124 have moved into engagement with the locking protrusions 4126. The engagement between the hooks 4124 and the locking tabs 4126 draws 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 pre-filter frame 4116 includes a pair of tabs 4304 at the bottom and a pair of slotted tabs 4306 at the top. As shown in fig. 51A-C, the particulate filter 4102 includes a pair of slotted feet 4300 at the bottom and a pair of fingers 4302 at the top. The finger 4302 may be configured to snap lock into engagement with the slotted tab 4306. For example, the fingers 4302 may be angled upward from the particulate filter frame. In use, the pre-filter 4100 is secured to the particulate filter 4102 by: the tabs 4304 on the bottom of the pre-filter frame are first inserted into slots in the feet 4300 on the bottom of the particulate filter 4102, and then the top of the pre-filter 4100 is tilted inward toward the top of the particulate filter 4102 to snap fit the slotted tabs 4306 over the fingers 4302 on the top of the particulate filter 4102.

Control system

The ATS410 includes a control system 412 that controls the operation of the ATS410 and provides a user interface for displaying information and receiving input from an operator. The main functions of the control system 412 are: control the speed at which the ATS410 operates to treat the air based on the measured parameters or operator input, track filter usage, inform the operator of the mode, motor speed setting, and filter life, and accept operator commands. The control system 412 includes a user interface embodied as a "dead front" display 416, the display 416 displaying information and receiving operator inputs related to operation and maintenance of the system. The display 416 includes a plurality of display elements 418 that are only visible when illuminated to provide a dynamic display of information that changes and presents the control options available at any given time (compare fig. 40 and 41). As with the display 16 discussed above, the display 416 of the ATS410 includes: an information display element 418a that is illuminated to provide information about the status of the ATS or monitored characteristics; and an input display element 418b that incorporates a touch sensor to allow an operator to provide input to the control system 412 (see fig. 41). In addition to allowing user input, the input display element 418b may also provide information regarding the status of the ATS, such as operating mode and fan speed. Display 416 includes substantially the same display elements 418 as display 16 described above, except that display elements 418 are differently arranged, and display 416 includes additional display elements to show when display 416 uses an integrated WiFi transceiver to communicate with an external network.

Control subsystem 460 includes control circuitry and firmware configured to operate ATS410 and coordinate data collection from various other subsystems, including capacitive touch sensor array 464, dust sensor 480, RFID subsystem 468, and wireless communication subsystem 470. Various modes of operation of the system will be described in more detail below. Referring now to the schematic presentation of FIG. 36, the electronics module 414 generally comprises a distributed control architecture with a master application controller 510, a touch monitor controller 512, an LED driver controller 514, and an RFID controller 516. The master controller 510 is connected to a dust sensor 480, an RFID subsystem 468 (including RFID controller 516 and RFID antenna 518), a wireless communication subsystem 470 (including bluetooth module 520 and WiFi module 522), and the electronic components (including LED driver controller 514 and touch monitor controller 512) that make up the display 416. The main controller 510 is also coupled to a fan motor power supply 530 to allow the main controller 510 to control fan speed and in some applications to receive feedback from the fan motor power supply 530. The master application controller 510 is also coupled to: a UART connector 526 for providing an audible output buzzer 524, for diagnostics, and a non-volatile memory (e.g., EEPROM 528) for storing pre-programmed operational presets and historical operational data, such as filter life, age, counters, and other variables that may be used in connection with the operation of the ATS 410. Touch monitor controller 512 is electrically connected to capacitive touch keys defined by a plurality of capacitive lines 532 and to ambient light sensor 534. In use, the touch monitor controller 512 may monitor the capacitive traces and the ambient light sensor 534 and provide touch/proximity information and ambient light information to the master application controller 510. LED driver controller 514 is coupled to LED array 462. In operation, the LED driver controller 514 may illuminate individual LEDs in the LED array 462 according to instructions received from the master application controller 510.

The control system 412 is incorporated into a self-contained electronics module 414. Referring now to fig. 37-39, the electronics module 414 for the ATS410 generally includes a base 4150, a dust sensor housing 4152, electronics assembly 550, and a screen 474. In this embodiment, the base 4150 is mounted to the filter housing 4112 and provides the structure to which the various components of the electronic module 414 are mounted. The base 4150 includes an electronic component seat (not shown) that allows the electronic component 550 to be mounted to the bottom surface of the base 4150, for example, by bolts (not shown) extending through the mounting tabs 552. The base 4150 also includes a dust sensor compartment 560, the dust sensor compartment 560 housing the dust sensor 480 and providing a flow path to direct air over the dust sensor 480. The flow path generally includes a sensor inlet 482, a sensor passage 484, and a sensor outlet 486. The sensor inlet 482 may be closed by a dust screen 562 to avoid large particles from fouling the dust sensor 480. The dust sensor 480 may be enclosed within a pair of rubber housing halves 488a and 488b, the pair of rubber housing halves 488a and 488b creating a leak-free seal around the dust sensor 480. The dust sensor housing 4152 may define a plurality of air flow openings 564 that allow air to flow out of the dust sensor compartment 560 to a location upstream of the particulate filter 4102. It has to be noted that the dust sensor flow path is described for the following system: in this system, the partial vacuum created by the fan 456 draws air into the ATS410 along the dust sensor flow path. Alternatively, if the air released by the ATS410 through the air outlet 4108 creates a greater partial vacuum at the sensor inlet 482 than the fan creates at the aperture airflow opening 564 in the dust sensor housing 4152, the air may flow in the opposite direction through the dust sensor flow path.

The electronic assembly 550 for the ATS410 generally includes a bottom PCB 566, an optical conductor 472, and a top PCB568 (see fig. 39). The bottom PCB 566 may support the entirety of the circuitry and circuit components, including the various controllers and the LED array 462. The LED array may include a plurality of individual LEDs 462a that may be selectively illuminated as appropriate. Each LED 462a may comprise a single LED or multiple LEDs providing various lighting options. In this embodiment, the individual LEDs associated with the filter life display element may include a red LED and a green LED; the individual LEDs associated with the ATS display element, the power display element, and the line display assembly may comprise white LEDs; the LEDs associated with the fan speed display element, the turbine mode display element, the WiFi display element, and the dust sensor cloud sensor element may each include a blue LED and a white LED; the LEDs associated with the first dust level display may include red LEDs, green LEDs, and yellow LEDs; each LED associated with the second and third dust levels may include a red LED and a yellow LED; each LED associated with the fourth and fifth dust levels may comprise a red LED, and each LED associated with the night mode display element may comprise a red LED and a white LED. As with the ATS10, the LED array 462 may be replaced or supplemented by other types of light sources, such as OLED, laser, and EL light sources.

The light conductor 472 provides a mounting structure for the PCBs 566 and 568 and includes a plurality of light pipes 472a that transmit light from the LED array 462 on the bottom PCB 566 through openings in the top PCB568 to illuminate the display elements 418 on the screen 474. Light pipe 472a is configured to create a light flow path from LED 462a to the corresponding display element 418. The light pipes 472a may be isolated from each other to avoid light leakage from one LED 462a to an adjacent display element 418. The surface of light pipe 472a may be coated or textured to generate dispersed light.

Top PCB568 is mounted atop optical conductor 472. The top PCB568 defines a plurality of light openings 570 and a plurality of traces 532 that function as capacitive touch sensors. In this embodiment, the top PCB568 includes a separate light opening 570 (see FIGS. 38 and 39) for each display element 418. The size, shape, and configuration of the light opening 570 may vary from application to application, depending, for example, on the desired lighting effect. As described above, the control system 410 includes a plurality of capacitive touch sensors 464. The design and construction of capacitive touch sensors may vary depending on the application. For example, each capacitive touch sensor may include a pair of electrodes and a touch may be identified by monitoring the mutual capacitance between the pair of electrodes. As another example, each capacitive touch sensor may include a single electrode, and a touch may be recognized by monitoring the self-capacitance of the electrode. Referring now to FIG. 39, a line 523 (or pair of lines) extends around each light opening 570 associated with an input display element 418 b. More specifically, conductive traces 532 (or pairs of traces), such as copper conductive elements, are provided around the perimeter of the respective light openings 570 associated with the input display elements 418 b. The size, shape, span, and other aspects of the configuration of the individual conductive traces 532 can vary from application to provide desired touch sensor characteristics. In addition, the top PCB568 may include additional conductive traces 532b intended to sense operator proximity. As shown in fig. 39, the proximity sensor trace 532b may be a relatively large trace that extends along a significant portion of the top PCB 568. In use, touch monitor controller 512 may monitor various conductive traces 532 to determine when a touch or proximity event occurs.

In this embodiment, the control system 412 includes a single screen 474 that covers all of the display elements 418. The screen 474 is a laminated construction that basically comprises a diffusing layer and a masking layer. The diffusion layer disperses light generated by the LED. The masking layer masks light to produce the desired pattern, including various opaque and translucent materials such as inks, lacquers, films, and other adhesive layers. In the illustrated embodiment, the obscuring layer is disposed on the outer surface of the diffusion layer relative to the LED or other light source, but it may be located elsewhere if desired. Although the obscuring layer and the diffusion layer are part of a single laminate construction in the illustrated embodiment, they may alternatively be separate components. For example, they may be manufactured separately and placed adjacent to each other during assembly of the display 416.

The operation of the ATS410 will now be described with reference to fig. 42 and 43. Fig. 42 is an illustration of the display 416, showing the outline of all display elements 418, including an information display element 418a and an input display element 418 b. FIG. 43 shows a series of illustrations of the displays 416a-m in different modes of operation. In the illustrated embodiment, the display 416 may be in three different states when the power is off. When the ATS410 is unplugged or not receiving power, the display is completely blank, as shown by display 416 a. When the ATS410 is plugged in, but not powered on and no user is approaching, the display elements 618a-c are illuminated to display a line across the display 416, as shown by display 416 b. When the ATS410 is plugged in, but not powered on and is accessed by a user, the display elements 618a-c and 608 are illuminated to display lines and power icons, as shown by display 416 c.

The control system 412 may determine operator proximity by monitoring the capacitive line 532 b. The control system 412 and the access line 532b may be configured to use various alternative approaches to determine when the operator is approaching. In the illustrated embodiment, the control system 412 and the access line 532b are configured to determine that the operator is approaching when the operator comes within about twelve inches of the line 532b, for example, by waving the operator's hand over the display 416 within about twelve inches of the window 433. The size, shape, and configuration of the line 532b and/or the sensitivity of the control system 412 to changes sensed in the line 532b may be varied to increase or decrease how close the operator must be in order for the system to conclude that a user is approaching. The control system 412 may determine that the user is not in proximity based on the time elapsed after the display 416 has received the user input. For example, the control system 412 may reset a countdown timer each time a user input event occurs. A user input event may occur each time the user touches the touch key line 532 or each time the user comes within a sufficiently close distance of the proximity line 532 b. If the countdown timer reaches zero, the control system 412 will conclude that there is no operator present and adjust the display 416 accordingly. The control system 412 may then begin to continue monitoring the proximity line 532b to determine when the user is back close enough to within the display 416. In addition, if the touch key 532 is touched by the user, the control system 412 may also conclude that the user is in proximity.

Once powered on, the display 416 can operate in various alternative states. When the ATS410 is in manual mode and the user is approaching, all display elements are moderately lit, as shown by display 416 d. Display elements 618a-c are illuminated to display the lines. The display element 608 is illuminated to display the power icon. The display element 614 is illuminated to display the night mode icon. Because the ATS410 is not in the night mode, the display element 614 lights up as white. The display element 606 (including the dust icon 606a and the appropriate dust level indicator 606b) is illuminated. Because the ATS410 is not in the automatic mode, the dust icon lights up in white. Further, since the dust level is sufficiently low, only a single dust level indicator 606b is illuminated, and it is illuminated green. The display element 616 (including the fan icon 616a and the appropriate fan speed indicator 616b) is illuminated. Because ATS410 is in manual mode, fan icon 616a is illuminated blue. All of the fan speed indicators 616b are illuminated, with the indicator representing the actual fan speed illuminated in blue and the indicator representing the available higher fan speed illuminated in white. The display element 612 is illuminated white to indicate that the ATS410 is not in the turbo mode. The filter life display elements 600, 602, 604 (including the ATS icon 605) are illuminated. In this example, all filters have remaining life and are therefore lit green. The ATS icon 605 is lit white. Finally, the display element 620 is illuminated to display the WiFi icon. In this example, no WiFi transmission is made, so the WiFi icon is lit white. When the operator is no longer in proximity, the display 416 transitions to an off state, showing significantly fewer display elements. Referring now to display 416e, display element 618b is illuminated to display the central portion of the line. The display element 606 (including the dust icon 606a and the appropriate dust level indicator 606b) is illuminated. The display element 616 (including the fan icon 616a and the appropriate fan speed indicator 616b) is illuminated. In this state, only the fan speed indicator representing the actual fan speed is illuminated blue. The available higher fan speed is not illuminated. If any of the filters are expired, the display will also show filter life display elements 600, 602, 604, including an ATS icon 605. In the example shown in display 416f, pre-filter icon 600 is illuminated green to indicate that it has remaining life, particulate filter icon 602 and carbon filter icon 604 are illuminated red to indicate that they are expired, and ATS icon is illuminated white.

The operator may place the ATS410 into the automatic mode by touching the dust sensor icon 606 a. When the ATS410 is in automatic mode and the user is approaching, all display elements are moderately lit, as shown by display 416 g. Display elements 618a-c are illuminated to display the lines. The display element 608 is illuminated to display the power icon. The display element 614 is lit white to display the night mode icon. The display element 606 (including the dust icon 606a and the appropriate dust level icon 606b) is illuminated. Because the ATS410 is in the automatic mode, the dust icon 606a is lit blue. Further, since the dust level is located at the highest display level, all the dust level indicators 606b are lit red. The display element 616 (including the fan icon 616a and the appropriate fan speed indicator 616b) is illuminated. Because the ATS410 is in the automatic mode, the fan icon 616a is lit white. The fan speed indicator 616b, which represents the actual fan speed, is illuminated blue. In this example, the fan is operating at maximum speed, so all indicators are illuminated blue. The display element 612 is illuminated white to indicate that the ATS410 is not in the turbo mode. The filter life display elements 600, 602, 604 (including the ATS icon) are illuminated. In this example, all filters have a remaining life and are therefore lit green. The ATS icon is lit white. Finally, the display element 620 is illuminated to display the WiFi icon. In this example, no WiFi transmission occurs, so the WiFi icon is lit white. When the operator is no longer proximate, the display 416 transitions to a light-off state, showing significantly fewer display elements. Referring now to display 416b, display element 618b is illuminated to display a central portion of the line. The display element 606, including the dust icon 606a (blue) and appropriate dust level indicator 606b (red), is illuminated. A display element 616, including a fan icon 616a (white) and an appropriate fan speed indicator 616b (blue), is illuminated. If any of the filters are expired, the display 416 will also show filter life display elements 600, 602, 604 (including the ATS icon 605) (see, e.g., FIG. 416 f).

The operator may activate the turbo mode by touching the turbo icon. When the ATS10 is in turbo mode and the user is approaching, all display elements are moderately lit, as shown by display 416 i. Display elements 618a-c are illuminated to display the lines. The display element 608 is lit to white to display the power icon. The display element 614 is lit to white to display the night mode icon. The display element 606, including a dust icon 606a (white) and an appropriate dust level indicator 606b, is illuminated. Since the dust level is medium, the three dust level indicators are lit yellow. A display element 616, including a fan icon 616a (white) and an appropriate fan speed indicator 616b, is illuminated. Because the ATS410 is in the turbo mode, the fan is operating at maximum speed and all indicators 616b are illuminated blue. The display element 612 is illuminated blue to indicate that the ATS410 is in the turbo mode. The filter life display elements 600, 602, 604 (including the ATS icon 605) are illuminated. In this example, all filters have remaining life and are therefore lit green. The ATS icon is lit white. Finally, the display element 620 is illuminated to display the WiFi icon. In this example, no WiFi transmission occurs, so the WiFi icon is lit white. When the operator is no longer proximate, the display 416 transitions to a light-off state, showing significantly fewer display elements. Referring now to display 416j, display elements 618a and 618b are illuminated to display the left and middle portions of the lines. The display element 606, including a dust icon 606a (white) and an appropriate dust level indicator 606b (yellow), is illuminated. A display element 616, including a fan icon 616a (white) and an appropriate fan speed indicator 616b (blue), is illuminated. The display element 612 is illuminated blue to indicate that the ATS410 is in the turbo mode. If any of the filters are expired, the display 416 will also display filter life display elements 600, 602, and 604, including an ATS icon 605 (see, e.g., display 416 f).

The ATS410 may be placed in the night mode by touching the night mode icon. When in the night mode, the display 416 only displays the night icon 614, which lights up in red, as illustrated in display 416 k. When in the night mode, the control system 412 limits the maximum speed of the fans 456 and slows the rate at which the fans 456 transition from one speed to another. When in the night mode, the control system 412 may be configured to implement other features. In this embodiment, the control system 412 may operate in a manual or automatic mode when in the night mode. For example, when the control system 412 is in the manual mode or the automatic mode, the user may touch the night mode icon 614 and the control system 412 will transition to the night mode, otherwise continue to operate the air mover 456 according to the existing mode. When transitioning from manual mode to night mode, the control system 412 will operate the fan 456 at a manually specified speed unless the manually set speed is above the maximum speed threshold. If so, the control system 412 reduces the fan speed to meet the maximum speed threshold for the night mode. When transitioning from the automatic mode to the night mode, the control system 412 allows the automatic speed control algorithm to control the fan speed, except that the control system 412 does not allow the fan speed to exceed the maximum speed threshold and changes from one fan speed to another fan speed at a slower transition rate.

ATS410 may also have the capability to connect to external applications using WiFi or other wireless communication systems. To enter the wireless communication mode, the operator may touch the WiFi icon (display element 620). When the ATS410 attempts to establish a wireless connection, the display element 620 may be illuminated blue in a blinking pattern, as shown by display 416 l. Once the connection is established and while the ATS410 remains in wireless communication mode, the flashing may cease and the display element 620 may be illuminated blue, as shown by display 416 m. In this embodiment, wireless communication may be employed during any mode of operation, and the control system 412 may continue to operate the display 416 according to the existing mode of operation. Wireless communication may be used to transmit to a remote location operations associated with the ATS410, such as filter life data for various filters, speed and operating time of the fan motor, and dust sensor readings over a period of time. Wireless communication may also be used to transmit diagnostic information, including data that may allow an individual to obtain the operation of the ATS410 at a remote location to determine if maintenance or repair is required. Further, the wireless communication may be used to update firmware and/or any other programs or data contained within the control system 412.

The foregoing is a description of the present embodiments of the invention. Various modifications and changes may be made without departing from the spirit and broader aspects of the invention as defined in the appended claims, which are to be interpreted in accordance with the principles of patent law including the doctrine of equivalents. The present disclosure is presented for illustrative purposes and should not be construed as an exhaustive description of all embodiments of the invention or to limit the scope of the claims to the particular embodiments illustrated or described in connection with such embodiments. For example and not by way of limitation, any individual element(s) of the described invention may be replaced by alternative elements that provide substantially similar functionality or provide suitable operation. This includes, for example, presently known alternative elements, such as may be presently known to those skilled in the art, as well as alternative elements that may be developed in the future, such as those that will be recognized as alternatives once developed by those skilled in the art. Further, the disclosed embodiments include multiple features that are described together and that together may provide a range of benefits. The present invention is not limited to embodiments that include all of these features or embodiments that include all of the benefits set forth, unless expressly stated otherwise in the claims as filed. Reference to any claim element in the singular (e.g., using "a," "an," or "the") should not be construed as limiting the element to the singular.

Claims (31)

1. An air treatment system, comprising:

a flow path including an inlet, a filter housing, and an outlet;

a plurality of filters disposed in the filter housing along the flow path;

a fan for moving air through the flow path and the plurality of filters; and

a self-contained electronics module including control circuitry, a user interface, and a dust sensor, the self-contained electronics module being a complete unit capable of being tested and calibrated prior to installation within the air handling system.

2. The air treatment system of claim 1, wherein the user interface includes a dead-front display having a plurality of light sources, a screen defining a plurality of display icons, and an array of light pipes directing light from the light sources to the display icons.

3. The air treatment system of claim 2, further comprising a front cover covering the filter.

4. The air treatment system of claim 3, further comprising a translucent portion allowing viewing of the display, wherein the translucent portion is a translucent window.

5. The air treatment system of claim 2, wherein the display includes a plurality of display elements, the control circuit configured to provide a dynamic display by selectively illuminating different sets of the display elements depending on an operating mode of the air treatment system.

6. The air handling system of claim 2, wherein the dead-side display includes a plurality of touch sensors.

7. The air treatment system of claim 6, wherein each of the touch sensors is a capacitive touch sensor.

8. The air treatment system of claim 7, wherein each of the touch sensors comprises a transparent capacitive film.

9. The air treatment system of claim 6, wherein each of the touch sensors includes traces disposed on a circuit board.

10. The air treatment system of claim 3, wherein the electronics module includes a housing supporting the screen, the front cover being engaged with the housing, the engagement between the front cover and the housing providing registration between the translucent portion and the screen.

11. The air handling system of claim 1, wherein the dust sensor includes an inlet in communication with the flow path, the inlet being disposed upstream of the filter within the flow path, whereby air is drawn through the dust sensor by the fan and treated prior to being discharged through the outlet.

12. The air handling system of claim 11, wherein the electronics module includes a housing supporting the screen, and the dust sensor includes a dust sensor inlet mounted in the housing and exposed to the environment.

13. The air handling system of claim 2, wherein the display includes a filter life display, a fan speed display, and a dust level display.

14. The air treatment system of claim 3, wherein each of the display elements includes a light source, a light pipe, and a screen including a obscuring layer and a diffusing layer, the light source being sufficiently bright to illuminate the translucent portion when illuminated, the translucent portion exhibiting an opaque appearance when the light source is not illuminated.

15. The air treatment system of claim 4, wherein each of the display elements includes a light source, a light pipe, and a screen, the screen including a obscuring layer and a diffusing layer, the light source being sufficiently illuminated to illuminate the translucent window when illuminated, the screen being concealed by the translucent window when the light source is not illuminated.

16. The air treatment system of claim 14, wherein at least one of the display elements comprises a segment of a capacitive film, the control circuitry being capable of confirming a touch based on measurements taken from the segment of the capacitive film.

17. The air treatment system of claim 16, wherein the capacitive membrane is housed within the electronics module.

18. The air handling system of claim 14, wherein at least one of the display elements includes a line extending at least partially around the light pipe for the display element, the control circuit being capable of confirming a touch based on measurements taken from the line.

19. The air treatment system of claim 16, wherein the control circuit includes an interlock for determining when the front cover has been removed, the control circuit recognizing a touch based on a comparison of a threshold value to measurements taken from sections of the capacitive film, the control circuit operating based on a first threshold value when the front cover is present, the control circuit operating based on a second threshold value different from the first threshold value when the front cover is removed.

20. The air treatment system of claim 19, wherein the interlock includes a hall effect sensor within the electronic module; and is

Wherein the front cover includes a magnet positioned to affect the Hall effect sensor when the front cover is installed.

21. The air treatment system of claim 18, wherein the control circuit includes a capacitive sensor for determining when the front cover has been removed, the control circuit recognizing a touch based on measurements taken by the wires, the control circuit operating based on a first threshold when the front cover is present, the control circuit operating based on a second threshold different from the first threshold when the front cover is removed.

22. The air treatment system of claim 1, further comprising an RFID reader/writer positioned proximate to the filter housing, the control circuitry configured to operate the RFID reader/writer to maintain filter life data on an RFID tag included in at least one of the filters.

23. The air treatment system of claim 22, wherein the control circuitry is configured to operate the RFID reader/writer to retrieve a serial number from an RFID tag included in at least one of the filters.

24. An air treatment system according to claim 14, wherein the light source comprises at least two light emitting elements, whereby each of the display elements is capable of being illuminated in at least two different states.

25. The air treatment system of claim 1, wherein the electronic module includes a wireless transceiver, the control circuit being capable of receiving operator input from a remote electronic device through the wireless receiver.

26. The air treatment system of claim 1, wherein the electronic module includes a wireless transceiver, the control circuit being capable of receiving operator input from a remote electronic device via the wireless receiver, the control circuit being capable of communicating information about the air treatment system to the remote electronic device.

27. The air handling system of claim 1, wherein a sensor conduit passes a flow of air through the self-contained electronics module from an air inlet to the self-contained electronics module to the dust sensor located within the self-contained electronics module.

28. The air treatment system of claim 1, wherein the self-contained electronics module is a replaceable unit.

29. The air handling system of claim 1, wherein the self-contained electronics module is configured to be tested and calibrated prior to installation within the air handling system.

30. The air treatment system of claim 1, wherein the self-contained electronics module includes all of the electronic components of the air treatment system, except for a power supply component.

31. The air handling system of claim 30, wherein the self-contained electronics module is calibratable and testable prior to installation and assembly of the air handling system.

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