# US 9,433,951 B1 · Infrared burner for pressure washers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,433,951 B1 - Document ID: US9433951B1 - Status: Granted - Kind: B1 - Application number: 14/946,260 - Filed: 2015-11-19 - Granted: 2016-09-06 - Earliest claimed: 2015-11-19 - Applicants: Rick Arnold; Dan Formanek - Inventors: Rick Arnold; Dan Formanek - Web page: https://patentgrep.com/patent/US9433951B1 ## CPC - B05B 1/24: incorporating means for heating the liquid or other fluent material, e.g. electrically - B05B 9/002: {incorporating means for heating or cooling, e.g. the material to be sprayed} - B08B 3/026: {Cleaning by making use of hand-held spray guns; Fluid preparations therefor} - F23D 14/02: Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone - F23D 14/145: {combustion being stabilised at a screen or a perforated plate} - F24H 1/165: {using fluid fuel} - B08B 2203/007: Heating the liquid - F28D 7/024: {the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration} - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) - B08B: CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL - F23D: BURNERS - F24H: FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL (steam generation F22) - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) ## Abstract A pressure washer with an infrared burner for generating hot water is provided. The washer comprises of: an upright cylindrical shell having a flue on the top and being open at the bottom, and having furnace type insulations as lining on its inner and outer walls; a coil type heat exchanged fitted inside said shell, said heat exchanger having a cold liquid input and a hot liquid output; an upright porous-cylinder inserted into said heat exchanger, said porous-cylinder having a closed top, an open bottom, an inner surface area, an outer surface area, and a cylinder volume being the volume inside said cylinder; a perforated sleeve tightly fitted into said porous cylinder covering all the inner surface area of said porous-cylinder; an air-fuel mixing chamber to generate an air-fuel mixture; an injection system to inject said air-fuel mixture into said cylinder volume; a perforated plate at the bottom of the cylinder to distribute the air-fuel mixture into the volume; an ignition means located close to the outer surface of said porous cylinder; whereby a uniform infrared radiating flame is form all over the porous cylinder, thereby uniformly heating the liquid flowing through said coil. ## Claims ### Claim 1 A pressure washer with an infrared burner for generating hot water comprising: a. a shell having a closed top with a vent, an open bottom, and side walls with inner and outer surfaces; b. a heat exchanger fitted inside said shell, said heat exchanger having a cold liquid inlet port and a hot liquid outlet port, and wherein said heat exchanger has an open inner space; c. a perforated rigid frame inserted into said open inner space of said heat exchanger, said perforated rigid frame is designed to provide a uniform flow of a gas through all its perforated surface, said perforated rigid frame having an open bottom, an inner surface area, an outer surface area, and an inner volume; d. a porous burner being a porous cover wrapped around said perforated rigid frame, wherein the outer surfaces of said porous burner are at a predefined distance with said heat exchanger, whereby said distance is determined by the BTU size of said infrared burner, size of said heat exchanger and experimental trials to obtain the lowest combustion emissions; e. a bottom plate sealably attached to the bottom of said perforated rigid frame, thereby forming a closed volume inside said porous burner, said bottom plate being large enough to also receive said bottom of said shell; f. an air-fuel supply system attached to said bottom plate to supply an air-fuel mixture into said inner volume; g. an ignitor located close to the outer surface of said porous burner to ignite said gas that permeate through the porous burner forming an infrared radiating flame all over the porous burner, thereby uniformly heating the liquid flowing through said heat exchanger, and whereby said pressure washer produces hot water with a high heat exchanger efficiency and low combustion emissions and pollution by both infrared radiation and by having hot air go through said heat exchanger coil. ### Claim 2 (depends on 1) The pressure washer of claim 1, wherein said shell and said porous burner are cylindrical. ### Claim 3 (depends on 1) The pressure washer of claim 1, further having insulation material as lining on the outer walls of said shell. ### Claim 4 (depends on 1) The pressure washer of claim 1, wherein said heat exchanger is a coil type heat exchanger. ### Claim 5 (depends on 1) The pressure washer of claim 1, wherein said predefined distance is between 2-6 inches and preferably about 4 inches. ### Claim 6 (depends on 1) The pressure washer of claim 1, wherein said porous burner is made of any one of stainless steel woven mesh or ceramic. ### Claim 7 (depends on 1) The pressure washer of claim 1, wherein said pressure washer has a liquid trap to collect any condensate and prevent it from entering into the porous burner. ### Claim 8 (depends on 1) The pressure washer of claim 1, wherein said ignitor is any one of spark ignitor or glow plug. ### Claim 9 (depends on 1) The pressure washer of claim 1, wherein said ignitor is inserted through an opening at the bottom plate to locate the ignitor close to the lower parts of the porous burner. ### Claim 10 (depends on 1) The pressure washer of claim 1, wherein said vent is a B vent rated for emission temperatures of less than 470° F. ### Claim 11 (depends on 1) The pressure washer of claim 1, wherein said vent is a L vent rated for emission temperatures of less than 570° F. ### Claim 12 (depends on 1) The pressure washer of claim 1, wherein said fuel being any one of natural gas or propane. ### Claim 13 (depends on 1) The pressure washer of claim 1, wherein said ignitor has means to provide a flame as a flame safeguard circuit. ### Claim 14 (depends on 1) The pressure washer of claim 1, further having a perforated plate attached to the bottom plate to uniformly distribute the air-fuel mixture into said inner volume. ### Claim 15 (depends on 1) The pressure washer of claim 1, wherein said air-fuel supply system comprises a fan attached to a cylindrical mixing chamber having a cylindrical body, wherein said cylindrical mixing chamber has an air inlet port on an axial plane and a fuel inlet port on said cylindrical body, whereby said fan sucks air from the ambient while mixing it with radially introduced fuel to provide good mixing between air and fuel before injection into said porous burner.