A compact hydrogen-oxygen generator

Patent metadata

Field	Value
Publication number	US-2022298654-A1
Application number	US-202017639066-A
Country	US
Kind code	A1
Filing date	Oct 15, 2020
Priority date	Dec 31, 2019
Publication date	Sep 22, 2022
Grant date	—

Abstract

The present invention discloses a compact vehicle-mounted hydrogen-oxygen generator. In the fluid path, the water circulation outlet of the water tank is in communication via one of the two one-way throttle valves with the water pump, which is in communication with the electrolytic tank of the hydrogen-oxygen generator, which is in communication with the water circulation inlet of the water tank through the other one-way throttle valve, and the gas outlet of the water tank is in communication with an engine air-inlet via the steam-water separator and the dry flame arrester in turn. In the circuit, the water pump and the electrolytic tank of the hydrogen-oxygen generator are connected in parallel to the ends of the positive and negative electrodes of the vehicle power supply, respectively; the switch, the fuse and the electrolytic tank of the hydrogen-oxygen generator are connected in series to the vehicle power supply. The present invention realizes high-efficiency electrolysis through a porous electrode rod with high specific surface area, high catalytic activity, high electrical conductivity and high surface energy (being hydrophilic and air-repellent), as well as the compact design of tightly nested stainless steel sleeves; on the premise of meeting the gas production requirements, the present invention reduces the volume and weight of the electrolytic tank; the present invention realizes the single electrolytic chamber assembly of the vehicle-mounted hydrogen-oxygen generator, and allows direct connection to a single sealed electrolytic chamber in the circuit and the fluid path, effectively avoiding the problem with the serial connection of multiple electrolytic chambers.

First claim

1 . A compact vehicle-mounted hydrogen-oxygen generator, comprising a box, a water tank, an electrolytic tank of the hydrogen-oxygen generator, a water pump, a working characteristic detection module, a fuse, a switch, a steam-water separator, a dry flame arrester and two one-way throttle valves, characterized in that:
the water tank is provided on the top with a liquid injection port, and on the side with a water circulation outlet, a water circulation inlet and a gas outlet; in the fluid path, the water circulation outlet of the water tank is in communication via one of the two one-way throttle valves with the water pump, which is in communication with the electrolytic tank of the hydrogen-oxygen generator, which is in communication with the water circulation inlet of the water tank through the other one-way throttle valve, and the gas outlet of the water tank is in communication with an engine air-inlet via the steam-water separator and the dry flame arrester in turn; in the circuit, the water pump and the electrolytic tank of the hydrogen-oxygen generator are connected in parallel to the ends of the positive and negative electrodes of the vehicle power supply, respectively; the switch, the fuse and the electrolytic tank of the hydrogen-oxygen generator are connected in series to the vehicle power supply; with the working characteristic detection module having five terminals in total, the first terminal is connected to the negative electrode of the electrolytic tank of the hydrogen-oxygen generator, the second terminal is connected to the negative electrode of the power supply, the third terminal is connected to the positive electrode of the electrolytic tank of the hydrogen-oxygen generator, the fourth terminal is suspended and not connected, and the fifth terminal is connected to the positive electrode of the power supply; in the electrolytic tank of the hydrogen-oxygen generator, a sealed electrolytic chamber is formed by an upper cover plate, a stainless steel sleeve and a lower cover plate, and is provided inside with a stainless steel tube as a cathode and a porous electrode rod as an anode; the porous electrode rod passes through the upper cover plate to serve as a positive electrode terminal, and the limit bolt connected to the stainless steel tube passes through the lower cover plate to serve as a negative electrode terminal; the upper cover plate and the lower cover plate are respectively provided with a water inlet and a water outlet to connect to the sealed electrolytic chamber; the porous electrode rod is prepared through the following steps: 1) dissolving FeCl 3 .6H 2 O and Na 2 S 2 O 8 in deionized water, and stirring to obtain solution A; 2) selecting iron-based alloy (containing 40% to 60% by mass of nickel, less than 0.03% by mass of S, and less than 0.03% by mass of P, with iron for the balance), and fully polishing its surface to remove the surface oxide scale; 3) adding the polished iron-based alloy obtained in step 2) to solution A, and reacting while stirring; and 4) taking out the iron-based alloy after the reaction, and washing and drying it.

2 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: the diameter of the anode porous electrode rod is 8-11.5 mm.

3 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: the stainless steel tube is a 304 stainless steel tube with an inner diameter of 12-14 mm and an outer diameter of 14-16 mm.

4 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: in step 1), the mass ratio of Na 2 S 2 O 8 , FeCl 3 .6H 2 O and water is (2 to 4):(5 to 7):25, and the stirring is done magnetically at a rotating speed of 50-150 rpm for 5-10 min.

5 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: 180-360 mesh SiC sandpaper is used for polishing in step 2), with the polishing time of 5-15 min.

6 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: the stirring in step 3) is done magnetically at a rotating speed of 50-150 rpm for 2-12 h; and
in step 4), the washing is done by washing with water and ethanol for 3-5 times, respectively, and the drying is done by drying in an oven for 0.5-2 h at the temperature of 40° C. to 80° C.

7 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: the upper cover plate is provided at the center of the lower surface with an upper circular groove, and the lower cover plate is provided at the center of the upper surface with a lower circular groove, with a stainless steel sleeve embedded between the upper circular groove and the lower circular groove; the porous electrode rod has its top threaded through the threaded through hole of the upper cover plate, and its bottom embedded in the small groove of the lower cover plate, so as to get fastened; the stainless steel tube is respectively embedded into the upper large groove of the upper cover plate and the lower large groove of the lower cover plate, so as to get fastened.

8 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: the upper cover plate is provided in the upper circular groove with an upper large groove, which is provided inside with a threaded through hole; a water inlet is arranged between the upper circular groove and the upper large groove; the lower cover plate is provided in the lower circular groove with a lower large groove, which is provided inside with a small groove, with a water outlet and a threaded through hole arranged between the lower circular groove and the lower large groove; the porous electrode rod has its top threaded through the threaded through hole of the upper cover plate, and its bottom embedded in the small groove of the lower cover plate, so as to get fastened; the stainless steel tube is respectively embedded into the upper large groove of the upper cover plate and the lower large groove of the lower cover plate, so as to get fastened; a limit bolt passes through a conductive plate in connection with the stainless steel tube of the cathode material, and then passes through the threaded through hole of the lower cover plate to fit with a nut to serve as the negative electrode terminal of the electrolytic tank; a water inlet pipe joint is embedded in the water inlet of the upper cover plate, and a water outlet pipe joint is embedded in the water outlet of the lower cover plate.

9 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: an electrolyte (0.03-0.5 M caustic potassium solution) flows into the compact sealed electrolytic chamber through the water inlet, and the generated hydrogen-oxygen mixture gas quickly flows out of the water outlet together with the electrolyte.

10 . The compact vehicle-mounted hydrogen-oxygen generator according to claim 1 , characterized in that: the upper cover plate and the lower cover plate are fastened through four limit bolts.

Assignees

• Univ South China Tech

Inventors

• Yuan Bin
• Peng Weiliang
• Li Hao
• Hu Renzong
• Gao Yan
• Zhu Min

Classifications

• C25B11/031

  Porous electrodes · CPC title

• C25B1/044 Primary

  producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO] · CPC title

• C25B9/17 Primary

  Cells comprising dimensionally-stable non-movable electrodes; Assemblies of constructional parts thereof · CPC title

• C25B15/023

  Measuring, analysing or testing during electrolytic production · CPC title

• F02B43/10

  Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen · CPC title