# US 2014/0150733 A1 · Water heater > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150733 A1 - Document ID: US20140150733A1 - Status: Published application - Kind: A1 - Application number: 13/776,976 - Filed: 2013-02-26 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: Grand Mate Co., Ltd. - Applicants: Grand Mate Co., Ltd. - Inventors: CHUNG-CHIN HUANG; CHIN-YING HUANG; HSIN-MING HUANG; HSING-HSIUNG HUANG; KUAN-CHOU LIN; YEN-JEN YEH - Web page: https://patentgrep.com/patent/US20140150733A1 ## CPC - F24H 1/145: {using fluid fuel} - F28D 1/00: Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators (F28D5/00 takes precedence) - F28D 1/0477: {the conduits being bent in a serpentine or zig-zag} - F28F 2215/12: with U-shaped slots for laterally inserting conduits - 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) - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) ## Abstract A water heater includes a water pipe form by bending a pipe. The entire water pipe leans related to a vertical plane to expose all the section to a burner thereunder. All the sections of the water pipe lean downwards related to a horizontal plane. It will make the water in the water in the water pipe flows backwards when no water is supplied to the water heater. Therefore, there will never be water remaining in the water pipe to get rid of the jam problem. ## Claims ### Claim 1 A water heater, comprising: a housing having a room therein; a burner received in the room of the housing; a water pipe received in the room of the housing and above the burner, wherein the water pipe is formed by bending a pipe into a continuous S-shape to have a plurality of straight sections and U sections, and the U sections are connected to ends of the neighboring straight sections respectively; and a plurality of heat exchange plates engaging the water pipe. ### Claim 2 (depends on 1) The water heater as defined in claim 1, wherein the housing has a first side and a second side, which is opposite to the first side, and a top end of the water pipe is adjacent to the first side and a bottom end of the water pipe is adjacent to the second side so that the water pipe leans related to a vertical plane. ### Claim 3 (depends on 1) The water heater as defined in claim 1, wherein the straight sections includes a plurality of first straight sections and a plurality of second straight sections in alternate connection; the first straight sections are not parallel to the second straight sections; and the first straight sections and second straight sections lean downwards related to a horizontal plane. ### Claim 4 (depends on 3) The water heater as defined in claim 3, wherein angles between the first straight sections and the horizontal plane are in a range between 3 degrees and 10 degrees. ### Claim 5 (depends on 3) The water heater as defined in claim 3, wherein angles between the second straight sections and the horizontal plane are in a range between 3 degrees and 10 degrees. ### Claim 6 (depends on 1) The water heater as defined in claim 1, wherein each of the heat exchange plates has a plurality of slots to engage the straight sections of the water pipe. ### Claim 7 (depends on 6) The water heater as defined in claim 6, wherein the heat exchange plates has a plurality of first heat exchange plates and a plurality of second heat exchange plates; the first heat exchange plates and the second heat exchange plates respectively engage the water pipe via opposite sides of the water pipe to have the water pipe received in the slots respectively. ### Claim 8 (depends on 7) The water heater as defined in claim 7, wherein the first heat exchange plates and the second heat exchange plates are in an alternate arrangement. ### Claim 9 (depends on 6) The water heater as defined in claim 6, wherein each of the heat exchange plates has a flange around the slot to be in contact with the water pipe. ### Claim 10 (depends on 9) The water heater as defined in claim 9, wherein each of the heat exchange plates has a recess on an edge of the slot, and a thermal conductor is received in the recess to contact the water pipe.