US 2008/0184991 A1 · Heated replacement air system for commercial applications

Abstract

Apparatus and a method for providing heated replacement air to a paint spray booth or other commercial process which requires heated make-up air to replace exhausted air. A blower draws outside air through a filter and an injection chamber prior to delivering the air to the process. Hot gases from a burner are injected into the injection chamber and mixed with the replacement air to adjust the temperature of the replacement air. The burner uses combustion air which is separate from the replacement air. The flow rate of the exhaust air and the replacement air can be adjusted to meet changing needs of the process. The BTU output from the burner is adjusted to maintain a desired replacement air temperature.

Claims14

Dependent claims

An apparatus for supplying heated replacement air to a process in which air is exhausted, the apparatus comprising:

an air intake connected to an injection chamber from which an adjustable volume of replacement air flows to the process,
a source of BTU energy positioned outside and connected to the injection chamber and configured to inject heated gas into the injection chamber, wherein the adjustable volume of air through the injection chamber can change without affecting the air-to-fuel ratio of said source of BTU energy;
and,
at least one process fan configured to:
i) draw the replacement air through the air intake and into the injection chamber based upon the variable requirements of the process, and
ii) deliver a predetermined and adjustable volume of the heated replacement air to the process

3 more elements

An apparatus for supplying heated replacement air to a process in which air is exhausted, the apparatus comprising:

an air intake connected to an injection chamber for supplying a desired volume of replacement air to the process;
a source of BTU energy positioned outside and connected to said injection chamber and configured to inject heated gas into said injection chamber;
at least one delivery fan configured to:
i) draw replacement air through the air intake and into said injection chamber,
ii) mix the heated gas with the replacement air to form the heated replacement air, and,
iii) deliver a predetermined adjustable volume of the heated replacement air to the process,
wherein the volume of the heated replacement air is substantially the same volume as the exhaust air from the process, and wherein the volume of the replacement air does not affect the air-to-fuel ratio of the BTU energy that is injected into said injection chamber.

4 more elements

A method for providing heated replacement air to a process in which air is exhausted comprising the steps of:

a) drawing an adjustable volume of replacement air through an air intake and an injection chamber;
b) injecting a flow of hot gas from a BTU source located outside the injection chamber into the replacement air as it is drawn through said injection chamber to heat the replacement air to the desired temperature where the injected hot gas is produced with an optimum air-to-fuel ratio not affected by changes in the replacement air volume, and,
c) mixing the replacement air and the injected hot gas to provide a substantially uniform temperature to the heated replacement air.

Dependencies are inferred from the claim text.

Heated replacement air system for commercial applications

Life of this patent

Heated replacement air system for commercial applications

Life of this patent

Abstract

Claims14