Plasma spray apparatus for coating substrates, including at least a working chamber including a plasma torch and at least a substrate support, in which an inert gas or a mixture of inert gases is contained at a pressure which is close to the normal pressure, and at least a gas circuit, in communication with said working chamber, including recirculating means of the inert gases contained in said working chamber. The recirculating means include a closed loop, including a blower and a first heat exchanger communicating with said working chamber for extracting the inert gases and supplying a first fraction of the cooled inert gases back into a first portion of the working chamber, and at least a path, communicating with said closed loop and including a compressor and a second heat exchanger for supplying a second fraction of the cooled inert gases into a second portion of the working chamber.

The disclosed technology includes an air filter box for filtering particulates from air. The air filter box can include a filter media pack having a filter layer and a plurality of filter media supports configured to support the filter layer. The air filter box can also include a filter housing having an inlet, an outlet, and a plurality of support tabs configured to align and support the filter media pack inside of the filter housing. The filter media pack can be configured to be folded and placed inside of the housing for cooperative engagement with the support tabs. The filter box can be configured to channel a mixture of air and particulates from the inlet, through the filter media pack, and out the outlet to create filtered air.

The disclosed technology includes an air filter box for filtering particulates from air. The air filter box can include a filter media pack having a filter layer and a plurality of filter media supports configured to support the filter layer. The air filter box can also include a filter housing having an inlet, an outlet, and a plurality of support tabs configured to align and support the filter media pack inside of the filter housing. The filter media pack can be configured to be folded and placed inside of the housing for cooperative engagement with the support tabs. The filter box can be configured to channel a mixture of air and particulates from the inlet, through the filter media pack, and out the outlet to create filtered air.

A coating booth includes a coating chamber in which coating is performed on a coated object by a coating device, a supply air chamber placed above the coating chamber, and a recovery chamber placed below the coating chamber. The coating booth is configured such that: air directed from the supply air chamber toward the recovery chamber flows through a predetermined region inside the coating chamber, the predetermined region including a passage region for the coated object; and the air directed from the supply air chamber toward the recovery chamber does not flow through a predetermined-region outside region inside the coating chamber.

A coating booth includes a coating chamber in which coating is performed on a coated object by a coating device, a supply air chamber placed above the coating chamber, and a recovery chamber placed below the coating chamber. The coating booth is configured such that: air directed from the supply air chamber toward the recovery chamber flows through a predetermined region inside the coating chamber, the predetermined region including a passage region for the coated object; and the air directed from the supply air chamber toward the recovery chamber does not flow through a predetermined-region outside region inside the coating chamber.

A plurality of painting zones is connected in series by a plurality of air exhaust ducts so as to allow air to flow through the painting zones. A paint mist in air having passed through a painting chamber of each painting zone is removed by a dry filter. Feedback control is performed on the temperature and the humidity of air in a second painting zone other than a third painting zone to which conditioned air from an air conditioner is supplied. Thus, it is possible to appropriately adjust the temperature and the humidity of each painting zone and avoid degradation of painting quality in each painting zone, while achieving downsizing of the entire system by not providing a recycling air conditioner on the route of an air flow passage.

A plurality of painting zones is connected in series by a plurality of air exhaust ducts so as to allow air to flow through the painting zones. A paint mist in air having passed through a painting chamber of each painting zone is removed by a dry filter. Feedback control is performed on the temperature and the humidity of air in a second painting zone other than a third painting zone to which conditioned air from an air conditioner is supplied. Thus, it is possible to appropriately adjust the temperature and the humidity of each painting zone and avoid degradation of painting quality in each painting zone, while achieving downsizing of the entire system by not providing a recycling air conditioner on the route of an air flow passage.

A system includes a paint booth including a room, a ceiling, and a floor. The system also includes a ceiling filter communicatively coupled to a first opening and a base filter communicatively coupled to a second opening. A first pressure sensor is configured to output a first measurement signal indicative of a first pressure drop across the ceiling filter. A second pressure sensor is configured to output a second measurement signal indicative of a second pressure drop across the base filter. A controller is configured to receive the first measurement signal and the second measurement signal and generate a first alert when the first pressure drop across the ceiling filter is greater than a first threshold pressure drop and generate a second alert when the second pressure drop across the base filter is greater than a second threshold pressure drop.

A system includes a paint booth including a room, a ceiling, and a floor. The system also includes a ceiling filter communicatively coupled to a first opening and a base filter communicatively coupled to a second opening. A first pressure sensor is configured to output a first measurement signal indicative of a first pressure drop across the ceiling filter. A second pressure sensor is configured to output a second measurement signal indicative of a second pressure drop across the base filter. A controller is configured to receive the first measurement signal and the second measurement signal and generate a first alert when the first pressure drop across the ceiling filter is greater than a first threshold pressure drop and generate a second alert when the second pressure drop across the base filter is greater than a second threshold pressure drop.

A portable paint booth has a floor, roof and walls made of non-porous materials, at least one door, an air inlet adapted to receive air from a mechanical blower, and an exhaust tube that extends from the booth and comprises at least one orifice disposed at a terminal end of the tube, wherein the terminal end of the tube is disposed above a junction of a wall and the roof when the booth is pressurized. The exhaust tube may be supported by a pole to hold the tube upright and maintain a predetermined height. The terminal end of the tube may be propped open by a support element that extends around a perimeter of the exhaust tube.