An air dust removal system (101) includes a dust removal system inlet, a dust removal system outlet, and an electric field device (1014). The electric field device (1014) has an electric field device inlet (1011), an electric field device outlet, a dust removal electric field cathode (10142), and a dust removal electric field anode (10141). The dust removal electric field cathode (10142) and the dust removal electric field anode (10141) generates an ionizing dust removal electric field. The dust removal electric field anode (10141) has a first anode portion (101412) and a second anode portion (101411). The first anode portion (101412) is close to the inlet of the electric field device (1014), and the second anode portion (101411) is close to the outlet of the electric field device (1014). At least one insulating mechanism (1015) is provided between the first anode portion (101412) and the second anode portion (101411).

A system for removing dust from air (101) includes a dust removal system inlet (1011), a dust removal system outlet, and an electric field apparatus (1014). The electric field apparatus (1014) has an electric field apparatus inlet (3085), an electric field apparatus outlet (3088), a dust removal electric field cathode (3081) and a dust removal electric field anode (3082). The dust removal electric field cathode (3081) and the dust removal electric field anode (3082) are used to generate an ionization dust removal electric field. By means of the present system for removing dust from air (101), particulate matter can be effectively removed from air.

Examples are disclosed that relate to cooking systems with internal ventilation systems. One example provides a cooking system comprising a cooking appliance, a ventilation duct comprising an inlet aperture configured to receive cooking exhaust, a fan disposed within the ventilation duct, the fan being configured to pull the cooking exhaust through the inlet aperture and the ventilation duct, a particulate removal system positioned within the ventilation duct between the inlet aperture and the fan, and a grease containment pan disposed beneath the particulate removal system and comprising a mount for supporting the particulate removal system, the grease containment pan being removable from the ventilation duct by a user for cleaning.

Examples are disclosed that relate to cooking systems with internal ventilation systems. One example provides a cooking system comprising a cooking appliance, a ventilation duct comprising an inlet aperture configured to receive cooking exhaust, a fan disposed within the ventilation duct, the fan being configured to pull the cooking exhaust through the inlet aperture and the ventilation duct, a particulate removal system positioned within the ventilation duct between the inlet aperture and the fan, and a grease containment pan disposed beneath the particulate removal system and comprising a mount for supporting the particulate removal system, the grease containment pan being removable from the ventilation duct by a user for cleaning.

The invention addresses the problem of air filtration and decontamination as required immediately for the COVID-19 pandemic but also will be useful in a variety of applications. Air (1) to the apparatus (100) enters and passes through an optional pre-filter (2) and through a one-way air “check” valve (3). The incoming air (1) then enters the counter-flow heat exchange path (4) and proceeds towards the heating chamber (6). As air enters the heating chamber (6), it immediately encounters heating elements (7). Upon encountering the heating chamber (6), the incoming air, which has been pre-heated by the exiting air, is heated to the desired temperature and exits via the return path (5). Upon completing the path through the exit path for the air, the air is now cooled to the desired exit temperature, for example within a few degrees of the incoming air, and is at a temperature suitable to exit (11) and be delivered to a user. This air may not have the virus removed from it, but the virus will be rendered harmless at this point. The invention is applicable in other contexts. For example, the operation of these systems can generally be reversed to decontaminate air including air exhaled by a user. This may be used in conjunction with a mask worn by a patient or an isolation chamber at least partially enclosing a patient, e.g., a patient room(s) or a tent erected over a patient gurney or bed.

An air dust removal system (101) and method, comprising a dust removal system inlet, a dust removal system outlet, and an electric field device. The electric field device comprises an electric field device inlet (1011), an electric field device outlet (1012), a dust removal electric field cathode (10142), and a dust removal electric field anode (10141). The dust removal electric field cathode (10142) and the dust removal electric field anode (10141) are used to generate an ionizing dust removal electric field. The present air dust removal system (101) and method may effectively remove particulate matter from the air.

An exhaust gas dust removal system, comprising a dust removal system inlet, a dust removal system outlet and an electric field apparatus, the electric field apparatus comprising an electric field apparatus inlet, an electric field apparatus outlet, a dust removal electric field cathode and a dust removal electric field anode, the dust removal electric field cathode and the dust removal electric field anode being used for producing an ionising dust removal electric field. A dust collection area of the dust removal electric field anode is larger than a discharge area of the dust removal electric field cathode, so that an asymmetric electrode attraction force is produced between the electrodes, to reduce electric field couplings.

Abstract: An air dust removal system (101), comprising a dust removal system inlet, a dust removal system outlet, and an electric field device (1014). The electric field device (1014) comprises an electric field device inlet (1011), an electric field device outlet, a dust removal electric field cathode (10142) and a dust removal electric field anode (10141), the dust removal electric field cathode (10142) and the dust removal electric field anode (10141) being used for generating an ionizing dust removal electric field. The dust removal electric field anode (10141) comprises a first anode portion (101412) and a second anode portion (101411), the first anode portion (101412) being close to the electric field device inlet (1011), the second anode portion (101411) being close to the electric field device outlet, and at least one cathode support plate (10143) being provided between the first anode portion (101412) and the second anode portion (101411). The air dust removal system (101) is able to effectively remove particulate matters in the air.

Abstract: An air dust removal system (101), comprising a dust removal system inlet, a dust removal system outlet, and an electric field device (1014). The electric field device (1014) comprises an electric field device inlet (1011), an electric field device outlet, a dust removal electric field cathode (10142) and a dust removal electric field anode (10141), the dust removal electric field cathode (10142) and the dust removal electric field anode (10141) being used for generating an ionizing dust removal electric field. The dust removal electric field anode (10141) comprises a first anode portion (101412) and a second anode portion (101411), the first anode portion (101412) being close to the electric field device inlet (1011), the second anode portion (101411) being close to the electric field device outlet, and at least one cathode support plate (10143) being provided between the first anode portion (101412) and the second anode portion (101411). The air dust removal system (101) is able to effectively remove particulate matters in the air.

An air dust removing method, comprising the follow steps: providing an electret element (205) in a position without dust in an electric field when an ionization dust removing electric field has a power-on driving voltage; when the ionization dust removing electric field has no power-on driving voltage, using the electret element (205) to absorb particulate matters in the air.