WO2019148785A1 - Dispositif de chauffage de liquide - Google Patents

Dispositif de chauffage de liquide Download PDF

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Publication number
WO2019148785A1
WO2019148785A1 PCT/CN2018/097171 CN2018097171W WO2019148785A1 WO 2019148785 A1 WO2019148785 A1 WO 2019148785A1 CN 2018097171 W CN2018097171 W CN 2018097171W WO 2019148785 A1 WO2019148785 A1 WO 2019148785A1
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WO
WIPO (PCT)
Prior art keywords
liquid
outer tube
heating
inner tube
temperature
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PCT/CN2018/097171
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English (en)
Chinese (zh)
Inventor
杜少玲
Original Assignee
佛山市海德精工电子科技有限公司
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Publication of WO2019148785A1 publication Critical patent/WO2019148785A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/121—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using electric energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/128—Preventing overheating
    • F24H15/132—Preventing the operation of water heaters with low water levels, e.g. dry-firing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/288—Accumulation of deposits, e.g. lime or scale
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • F24H15/34—Control of the speed of pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2028—Continuous-flow heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F24H1/162—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using electrical energy supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/281—Input from user
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/395—Information to users, e.g. alarms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/022—Heaters specially adapted for heating gaseous material

Definitions

  • the present invention relates to the technical field of liquid heaters, and more particularly to a liquid heating device.
  • the common continuous heating device for liquids includes an inner tube and an outer tube which are used together, wherein the outer tube is a thick-film heating element of a stainless steel tube, and the outer surface of the inner tube is provided with a wrapping glue with a threaded protrusion.
  • the flow path is formed between the wrapping glue and the inner surface of the outer tube, and the material of the wrapping glue is generally silica gel or rubber.
  • the silica gel will be infiltrated into the interior to cause bubbling and block the flow path; the rubber material is prone to odor, the food-grade rubber production process is complicated, the cost is high, and the rubber is in a high temperature and high pressure environment. When it meets water, it will produce odor and aging due to excessive temperature, which makes the rubber soft and sticky or even fall off, blocking the flow channel, resulting in a small or no water output;
  • a liquid heating apparatus which adopts a combination design of a spiral flow guiding structure fixed to the outer peripheral wall of the inner tube, an outer tube with a heating assembly, and a sealed end cap.
  • the manufacturing of the sealed connection structure can be reduced, the manufacturing cost is reduced, and the high temperature and high pressure resistance of the heating device is enhanced.
  • a liquid heating device comprising: an inner tube, a peripheral wall of the inner tube is provided with a spiral flow guiding structure; an outer tube, the outer tube is sleeved outside the spiral guiding structure; the outer tube a peripheral wall adapted to mount a heating assembly; a predetermined radial gap between the inner peripheral wall of the outer tube and the spiral flow guiding structure; a flow path formed between the inner tube and the outer tube At least one end opening of the flow channel is covered by a sealed end cap; the cavity wall of the flow channel is provided with a liquid inlet and a liquid outlet; the sealed end cover comprises: an annular end wall; and the annular end wall is disposed a first flange of the inner periphery; and a second flange disposed at an outer periphery of the annular end wall; the annular end wall is disposed on an end of the inner tube and the outer tube, and the A flange is welded to the inner peripheral wall of the inner tube, and the second flange is welded to the outer peripheral
  • the predetermined radial gap ranges from 0.05 mm to 0.5 mm.
  • spiral flow guiding structure is formed by a spiral wire sleeved on the inner tube.
  • the spiral wire is a stainless steel wire welded to the outer peripheral wall of the inner tube; and/or the axial cross-sectional shape of the spiral wire is triangular or trapezoidal or rectangular, and Or, both ends of the inner tube are flush with the two ends of the outer tube.
  • the inner tube and the outer tube are both stainless steel tubes
  • the sealed end cover is a stainless steel end cover.
  • the heating assembly includes: the heating assembly includes: an insulating dielectric layer disposed on an outer peripheral wall of the outer tube, and a heating circuit disposed on the insulating dielectric layer, the heating circuit including the heating circuit a plurality of heating resistors and electrodes on the insulating dielectric layer, wherein two ends of the heating resistor are electrically connected to the electrodes.
  • each of the heating resistors extends in a direction consistent with a length direction of the outer tube;
  • the liquid inlet is connected to a water pump;
  • the heating circuit further includes a first temperature sensor, and the first temperature sense a first controller electrically connected to the sensor;
  • the first temperature sensor is disposed at a position of the outer tube near the liquid outlet, and the first controller is configured to send according to the first temperature sensor
  • the temperature information controls the speed at which the water pump is charged and/or the heating power of the heat generating resistor.
  • the liquid heating device further includes a second temperature sensor, and a second controller electrically connected to the second temperature sensor; a second temperature sensor disposed on the outer tube and disposed adjacent to the heat generating resistor for detecting an outer tube temperature at a position thereof; the second controller is configured to receive the second temperature sensor The tube temperature, and when the outer tube temperature is higher than the first preset temperature threshold in the first predetermined heating period, the heating circuit is controlled to be disconnected and/or the airing reminding information is issued.
  • the second temperature sensor is further disposed near the liquid outlet, and a power density of the heat generating resistor close to the second temperature sensor is greater than a heat generating resistor circumferentially away from the second temperature sensor.
  • the second controller is further configured to control the heating circuit to be disconnected and/or when the received outer tube temperature is higher than a second preset temperature threshold for a second predetermined heating period A reminder message that the scale limit protection is issued.
  • liquid inlet and the liquid outlet are both disposed on the inner tube, and the inner tube is provided with a liquid inlet conduit corresponding to the liquid inlet, and the inner tube corresponds to the liquid outlet
  • the position of the mouth is provided with a liquid outlet conduit, at least the inlet conduit being arranged obliquely with respect to the centerline of the inner tube.
  • the present invention has the beneficial effects of sealingly connecting the inner tube and the end portion of the outer tube forming the flow passage by sealing the end cover, and specifically passing the end of the inner and outer tubes through the sealed end cover and then passing through the sealing end cover.
  • the first flange and the second flange are welded to the inner and outer tubes, and the sealing joint structure is processed separately, which is convenient for manufacturing, avoids the complicated process of the outer tube outer flange, and is easy to realize mass production and reduce the manufacturing cost.
  • the sealing effect is better, and the stability performance of the heating device for long-term exposure to high temperature and high pressure environment is improved.
  • FIG. 1 is a schematic exploded view of a liquid heating device according to an embodiment of the present invention.
  • Figure 2 is a perspective view of the three-dimensional structure of Figure 1;
  • Figure 3 is a top plan view of Figure 2;
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 3;
  • installation In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or connected, for example, unless otherwise specifically defined and defined. Or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components.
  • installation can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or an internal connection between two components.
  • the liquid heating apparatus includes an inner tube 1, an outer tube 21, and a heating assembly mounted on an outer peripheral wall of the outer tube 21.
  • the outer peripheral wall of the inner tube 1 is provided with a spiral flow guiding structure 11, and the outer tube 21 is sleeved outside the spiral flow guiding structure 11, and the spiral guiding structure 11 and the outer peripheral wall and the outer tube of the inner tube 1
  • the inner peripheral wall of 21 collectively encloses a spiral flow path 14 through which the heated liquid passes.
  • the inner peripheral wall of the outer tube 21 and the spiral flow guiding structure 11 are separated by a predetermined radial gap, and the radial gap is arranged to facilitate the inner tube 1 provided with the spiral flow guiding structure 11 to be inserted into the outer tube 21, Conducive to the flow of liquid in the flow channel 14, to facilitate the full heating of the flowing liquid.
  • the inner tube 1 is substantially centrally located inside the outer tube 21, and the radial gap corresponds to a difference between the inner circumference diameter of the outer tube 21 and the outer diameter D of the spiral flow guiding structure 11 One.
  • a flow path 14 is formed between the inner tube 1 and the outer tube 21, which are provided with the spiral flow guiding structure 11, and at least one end opening of the flow path 14 is covered by the sealing end cover 3 (two of the flow paths 14 in this embodiment) The end openings are all covered by a sealed end cap 3). Further, a liquid inlet 12 and a liquid outlet 13 are provided in the wall of the flow passage.
  • the sealing end cap 3 includes an annular end wall, a first flange 31 disposed at an inner periphery of the annular end wall, and a second flange 32 disposed at an outer periphery of the annular end wall, the annular end wall being disposed on the inner tube 1
  • the first flange 31 is welded to the inner peripheral wall of the inner tube 1
  • the second flange 32 is welded to the outer peripheral wall of the outer tube 21, that is, the sealed end cap 3 is passed.
  • the inner flange 1 and the outer tube 21 are welded together by the first flange 31 and the second flange 32, thereby achieving a sealed connection.
  • the method of separately processing the sealed connection structure is convenient for manufacturing, easy to mass-produce, can reduce the manufacturing cost, and has good sealing effect, and improves the stability performance of the heating device for a long time to withstand high temperature and high pressure environment.
  • the liquid to be heated flows along the flow path 14.
  • the heating assembly 20 mounted on the outer peripheral wall of the outer tube 21 heats the flowing liquid, and the heat generated by the heating assembly 20 passes through the outer tube 21 to exchange heat with the liquid in the flow path 14 to realize the liquid.
  • the continuous heating, and the sealed end cap 3, respectively, closes the flow passage 14 formed by the inner tube 1 and the outer tube 21 by welding, so that the liquid heating device can withstand the environment of high temperature and high pressure.
  • the heated liquid flows out from the liquid outlet 13.
  • a water pump is disposed at the inlet port 12 to continuously deliver pressurized liquid into the spiral flow path 14.
  • the predetermined radial gap between the inner peripheral wall of the outer tube 21 and the spiral flow guiding structure 11 is set to be 0.05 mm - 0.5 mm, in order to facilitate the inner tube in which the spiral flow guiding structure 11 is disposed. 1 While easily inserting into the outer tube 21, it is also avoided that the liquid directly flows through the radial gap along the longitudinal direction of the inner tube 1 to the liquid outlet 13 due to the excessive radial clearance, without passing through the inner tube 1
  • the spiral flow guiding structure 11 on the outer peripheral wall conducts a flow, which does not sufficiently heat the liquid; or because the radial clearance is too small, the liquid stagnates in the spiral flow guiding structure 11 and receives continuous heating of the heating assembly 20.
  • the embodiment provided by the present invention has been proved by a large number of experiments that when the radial gap is set in the range of 0.05 mm to 0.5 mm, sufficient heating of the liquid can be achieved, the heating effect is good, and the liquid overheating can be avoided while ensuring The liquid flows smoothly, avoiding the generation of large bubbles.
  • the spiral flow guiding structure 11 is formed by a spiral wire sheathed on the inner tube 1, and the spiral metal wire is directly exposed to contact with the liquid.
  • the spiral metal wire should be selected to be rust-free and harmless to the human body.
  • Metal material such as silica gel is prevented from bubbling due to heat aging, blocking the flow path, improving the service life of the heating device, and also improving food safety.
  • the spiral wire is configured as a stainless steel wire which is welded to the outer peripheral wall of the inner tube 1 to avoid noise generated by shaking in the flow path.
  • the axial shape of the spiral wire is triangular or trapezoidal or rectangular, and the bottom edge of the triangle or the trapezoid is welded to the outer peripheral wall of the inner tube 1, so that the flow path formed is simple, convenient for production, and diversion. The performance is more stable.
  • the two ends of the inner tube 1 and the outer tube 21 are flush, respectively, so that the first flange 31 and the second flange 32 of the sealing end cap 3 are welded to the inner peripheral wall of the inner tube 1 and the outer peripheral wall of the outer tube 21, respectively.
  • the inner tube 1 and the outer tube 21 are both provided as stainless steel tubes, and the sealed end cover 3 is provided as a stainless steel end cap.
  • the heating unit 20 includes an insulating medium layer 211 disposed on the outer peripheral wall of the outer tube 21, and a heat generating circuit 22 disposed on the insulating medium layer 211.
  • the insulating medium is printed on the outer peripheral wall of the outer tube 21.
  • the layer 211, the heat generated by the heating circuit 22 is used for heat exchange of the liquid flowing in the spiral flow path 14.
  • the outer tube 21 has a wall thickness ranging from 0.5 mm to 1 mm
  • the inner tube 1 has a wall thickness ranging from 0.3 mm to 1 mm.
  • the heating circuit 22 includes a plurality of heating resistors 221 and electrodes 222 fixed on the insulating dielectric layer 211.
  • the two ends of the heating resistor 221 are electrically connected to the electrodes 222, respectively, so that the power is connected to the electrodes 222 for supply.
  • the heating resistor 221 generates heat.
  • each of the heat generating resistors 221 extends in the same direction as the longitudinal direction of the outer tube 21, and the water inlet port 12 is connected to a water pump (not shown).
  • the liquid heating device further includes a first temperature sensor 223, and a first controller electrically connected to the first temperature sensor 223 (for example, PCB board control in this embodiment), the first temperature sensor 223 is disposed outside
  • the position of the tube near the liquid outlet 13 is. As can be seen from the figure, in the present embodiment, the liquid outlet 13 is opened on the inner tube 1.
  • the first temperature sensor 223 is as close as possible to the liquid outlet 13 and can be disposed closest to the outlet 13 of the outer tube 21. Radial position.
  • the first temperature sensor 223 can detect the liquid temperature of the liquid port 13 by detecting the temperature of the wall of the outer tube 21 near the liquid outlet 13, and the PCB is controlled according to the temperature information sent by the first temperature sensor 223.
  • the first temperature sensor 223 is disposed at a position close to the liquid outlet 13 and is as far as possible axially away from the heat generating resistor 221 in order to accurately detect the temperature of the liquid of the liquid outlet 13. In this way, the first temperature sensor 223 is configured to detect the temperature of the liquid and feed back to the PCB board.
  • the PCB board is compared with the temperature required by the user to set the liquid according to the measured liquid temperature data to automatically adjust the heating resistor 221 The heating power, or by controlling the water pump to regulate the flow rate of the liquid entering the flow passage 14, thereby achieving accurate control of the discharge temperature.
  • the liquid heating device further includes a second temperature sensor 224 and a second controller electrically connected to the second temperature sensor 224 (the second controller is also controlled by the PCB board described above in the embodiment).
  • the second temperature sensor 224 is disposed on the outer tube 21 and disposed adjacent to the heating resistor for detecting the temperature of the outer tube at the position of the second temperature sensor 224, and the second controller (PCB board) is configured to receive the second temperature sensor.
  • the temperature of the outer tube is issued, and when the temperature of the outer tube is higher than the first preset temperature threshold in the first predetermined heating period, the heating circuit 22 is controlled to be disconnected and/or the airing reminding information is issued. This is because when there is no liquid in the flow channel 14, the heat generated by the heating resistor 221 cannot be transferred to the liquid through the outer tube wall to dissipate heat, so that the outer tube wall is rapidly heated in a short time (ie, within the first preset heating period).
  • the PCB board can control the open circuit of the heating circuit according to the temperature information of the outer tube sent by the second temperature sensor 224, and/or issue an airing reminding message, thereby achieving dry burning protection and avoiding The heating assembly 20 is not burned.
  • the first temperature sensor 223 and the second temperature sensor 224 are arranged along the longitudinal direction of the outer tube 21 to facilitate the burn-in and laser trimming processes.
  • the second temperature sensor 224 can be disposed closer to the liquid outlet 13 with respect to the liquid inlet 12, preferably, the first temperature.
  • the sensor 223 is disposed closer to the liquid outlet 13 than the second temperature sensor 224.
  • the power density of the heating resistor 221 near the second temperature sensor 224 may be greater than the power density of the heating resistor circumferentially away from the second temperature sensor 224, in the case of non-dry burning, second
  • the controller (PCB board) is further configured to receive the temperature of the outer tube emitted by the second temperature sensor 224, and control when the temperature of the received outer tube is higher than the second preset temperature threshold in the second preset heating period
  • the heating circuit is open and/or a reminder message that the scale limit protection is issued.
  • the specific scale detection principle is as follows: the operating temperature (related to the power density) of the heat generating resistor 221 near the second temperature sensor 224 is higher than the heat generating resistor 221 of the other region, so that the scale is first at the second temperature. The periphery of the sensor 224 starts to gather, and the scale of the scale is more than the scale of the other areas. When the scale builds up to a certain extent, the heat resistance of the scale is large, that is, the thermal conductivity is small, and the heating resistor 221 continues to flow.
  • the heat generated by the heating resistor 221 at the scale collection due to the presence of the scale cannot be transferred longitudinally to the liquid through the stainless steel outer tube 21, thereby causing the temperature of the barrel wall of the outer tube 21 there.
  • the second temperature sensor 224 detects the temperature of the outer tube at this time and feeds back to the PCB board, sends out a message to remind the user that the scale needs to be cleaned, and controls the heating circuit to open the circuit to stop the heating, effectively preventing the scale buildup.
  • the heating resistor 221 is partially overheated, causing the risk of burning, and the scale is concentrated near the liquid outlet 13 to facilitate the user to clean the water. . As shown in FIG.
  • the line width of the heating resistor around the second temperature sensor 224 can be reduced.
  • the second temperature sensor 224 has the function of integrated detection, and can realize the functions of anti-dry protection and scale detection reminding, and optimizes the function of the liquid heating device.
  • the method of scale detection limit protection is as follows:
  • the second temperature sensor starts to detect the temperature of the outer tube, and the temperature of the outer tube is matched with the second controller (for example, the above PCB board is used in the embodiment)
  • the preset second preset temperature threshold is compared to generate an execution command when the outer tube temperature reaches the second preset temperature threshold.
  • the temperature detected by the second temperature sensor 224 is 55 to 91 ° C, and as the heating time increases, the scale of the second temperature sensor 224 starts to collect.
  • the scale increases, when the scale is concentrated to a certain extent, the temperature of the heating resistor increases, and the heat generated is transmitted laterally to the second temperature sensor 224, and the temperature of the outer tube is detected and fed back to the PCB board, and the PCB board.
  • the PCB board control disconnects the power supply and prompts the scale limit protection, reminding the user to clean the scale.
  • the liquid inlet 12 and the liquid outlet 13 are both disposed on the inner tube 1, and the inner tube 1 is disposed with a liquid inlet conduit 121 corresponding to the liquid inlet 12, and the inner tube 1 corresponds to the liquid outlet
  • the position of 13 is provided with a liquid discharge conduit 131 at least at least obliquely arranged with respect to the center line of the inner tube 1, so that the liquid is facilitated to flow.
  • the inlet conduit 121 and the outlet conduit 131 are mounted in a cavity formed in the center of the inner tube 1.
  • the liquid heating device provided by the embodiment of the invention has the advantages of simple structure, low manufacturing cost, low performance and high service life under high temperature and high pressure environment, high safety factor of stainless steel spiral flow passage, stable water outlet temperature, and increased scale detection. It improves the life of the heating element and has a high application and promotion value.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Resistance Heating (AREA)

Abstract

L'invention concerne un dispositif de chauffage de liquide qui comporte un tube interne (1), un tube externe (21) et une calotte d'étanchéité d'extrémité (3) , une paroi périphérique externe du tube interne (1) étant munie d'une structure de guidage de liquide en spirale (11) ; le tube externe (21) est disposé à l'extérieur de la structure de guidage de liquide en spirale (11) ; une paroi périphérique externe du tube externe (21) est conçue de sorte à avoir un ensemble de chauffage (20) monté sur ladite paroi ; une paroi périphérique interne du tube externe (21) et la structure de guidage de liquide en spirale (11) sont espacées par un vide radial prédéterminé ; un passage d'écoulement (14) est formé entre le tube interne (1) et le tube externe (21), et au moins une ouverture d'extrémité du passage d'écoulement (14) est recouverte par une calotte d'étanchéité d'extrémité (3) ; une entrée de liquide (12) et une sortie de liquide (13) sont agencées sur une paroi de chambre du passage d'écoulement (14) ; la calotte d'étanchéité d'extrémité (3) comprend une paroi d'extrémité annulaire, un premier rebord (31) agencé sur une périphérie interne de la paroi d'extrémité annulaire et un second rebord (32) agencé sur une périphérie externe de la paroi d'extrémité annulaire. Le dispositif de chauffage de liquide peut améliorer l'innocuité alimentaire d'un liquide chauffé, la structure d'étanchéité est facile à fabriquer afin de réduire le coût, et la résistance à une haute pression du dispositif de chauffage est améliorée.
PCT/CN2018/097171 2018-02-05 2018-07-26 Dispositif de chauffage de liquide WO2019148785A1 (fr)

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CN201810113460.3A CN108458474A (zh) 2018-02-05 2018-02-05 一种液体加热装置
CN201810113460.3 2018-02-05

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021170758A1 (fr) * 2020-02-25 2021-09-02 Jt International Sa Ensemble de chauffage
WO2022026477A1 (fr) * 2020-07-29 2022-02-03 Tom Richards, Inc. Élément chauffant en ligne
CN118669621A (zh) * 2024-08-23 2024-09-20 山东省煤田地质局第一勘探队 一种深层地热水传输管
CN118777539A (zh) * 2024-08-20 2024-10-15 防灾科技学院 一种水中甲烷亨利常数测定的智能恒温装置

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109458729A (zh) * 2018-11-01 2019-03-12 佛山市海德精工电子科技有限公司 管式厚膜加热器保护装置及管式厚膜加热器
CN109788589B (zh) * 2019-01-24 2021-10-29 广西桂仪科技有限公司 一种圆管厚膜加热器及制备工艺
CN110645700A (zh) * 2019-10-23 2020-01-03 中国科学院宁波材料技术与工程研究所 管道用电加热装置
CN111102735A (zh) * 2019-12-26 2020-05-05 佛山市海德精工电子科技有限公司 用于液体加热装置的内管及液体加热装置、制造方法
WO2024108352A1 (fr) * 2022-11-21 2024-05-30 深圳市虎一科技有限公司 Dispositif de chauffage à film épais, dispositif de chauffage et unité de chauffage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200986331Y (zh) * 2006-11-29 2007-12-05 汪本启 翼片式太阳能真空管
CN102967043A (zh) * 2011-08-30 2013-03-13 佛山市顺德昀陶设计有限公司 液体加热装置
CN206879125U (zh) * 2017-05-04 2018-01-12 常熟黑石电热科技有限公司 氧化镁绝缘加热管

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2588225Y2 (ja) * 1993-04-05 1999-01-06 東洋ラジエーター株式会社 アルミニューム製オイルクーラ
CN105546805B (zh) * 2016-02-05 2018-10-16 广西桂仪科技有限公司 一种液体加热装置
CN205481685U (zh) * 2016-02-05 2016-08-17 赵伟 一种液体加热装置
CN207975829U (zh) * 2018-02-05 2018-10-16 佛山市海德精工电子科技有限公司 一种液体加热装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200986331Y (zh) * 2006-11-29 2007-12-05 汪本启 翼片式太阳能真空管
CN102967043A (zh) * 2011-08-30 2013-03-13 佛山市顺德昀陶设计有限公司 液体加热装置
CN206879125U (zh) * 2017-05-04 2018-01-12 常熟黑石电热科技有限公司 氧化镁绝缘加热管

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021170758A1 (fr) * 2020-02-25 2021-09-02 Jt International Sa Ensemble de chauffage
WO2022026477A1 (fr) * 2020-07-29 2022-02-03 Tom Richards, Inc. Élément chauffant en ligne
US11988411B2 (en) 2020-07-29 2024-05-21 Tom Richards, Inc. Inline heater
CN118777539A (zh) * 2024-08-20 2024-10-15 防灾科技学院 一种水中甲烷亨利常数测定的智能恒温装置
CN118669621A (zh) * 2024-08-23 2024-09-20 山东省煤田地质局第一勘探队 一种深层地热水传输管

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