CN112460808A - Control method of heating device, heating device and intelligent closestool - Google Patents
Control method of heating device, heating device and intelligent closestool Download PDFInfo
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- CN112460808A CN112460808A CN201910845071.4A CN201910845071A CN112460808A CN 112460808 A CN112460808 A CN 112460808A CN 201910845071 A CN201910845071 A CN 201910845071A CN 112460808 A CN112460808 A CN 112460808A
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- temperature
- heating
- heating device
- flow
- control method
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D11/00—Other component parts of water-closets, e.g. noise-reducing means in the flushing system, flushing pipes mounted in the bowl, seals for the bowl outlet, devices preventing overflow of the bowl contents; devices forming a water seal in the bowl after flushing, devices eliminating obstructions in the bowl outlet or preventing backflow of water and excrements from the waterpipe
- E03D11/02—Water-closet bowls ; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03D—WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR
- E03D9/00—Sanitary or other accessories for lavatories ; Devices for cleaning or disinfecting the toilet room or the toilet bowl; Devices for eliminating smells
-
- 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
- F24H1/101—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 using electric energy supply
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
A control method of a heating device, the heating device and an intelligent closestool are provided, wherein the heating device comprises a heating pipe, an outlet water temperature sensor and a flow metering part, the flow metering part comprises an impeller, and the outlet water temperature sensor can measure the temperature of water flow at an outlet of a heater and form a detection temperature; the control method comprises the steps that the flow metering part is communicated with the heating pipe, the control method comprises the steps that whether the rotating speed of the impeller reaches a preset rotating speed or not is judged, if yes, a normal heating stage is started, if not, a trial heating stage is started, current pulses with preset duration are conducted on the heating pipe in the trial heating stage, whether the detected temperature is larger than a preset temperature or not is judged, and the preset temperature is larger than or equal to the environmental temperature of the environment where the heating device is located; if not, judging that the heating device is dry-burned, and controlling the heating device to enter water shortage treatment; reduce the dry combustion, improve the technical scheme of the life-span of the heating device.
Description
Technical Field
The invention relates to a household device, in particular to a control method of a heating device, the heating device and an intelligent closestool using the heating device.
Background
The heating device needs to heat flowing water, in order to prevent the long-time dry burning of the heating device from reducing the service life of the heating device, whether water flows through the heating device or not needs to be confirmed before heating and in the heating process, and the prior art judges through the rotating speed of the impeller, but the impeller often cannot rotate due to other reasons, so that the judgment is wrong; therefore, how to reduce dry burning and prolong the service life of the heating device is a technical problem.
Disclosure of Invention
The invention aims to provide a technical scheme for reducing dry burning and prolonging the service life of a heating device.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of a heating device comprises a heating pipe, an outlet water temperature sensor and a flow metering part, wherein the flow metering part comprises an impeller, and the outlet water temperature sensor can measure the temperature of water flow at the outlet of the heating pipe and form a detection temperature; the flow metering part is communicated with the heating pipe, the control method comprises the steps of judging whether the rotating speed of the impeller reaches a preset rotating speed or not, if so, entering a normal heating stage, if not, entering a trial heating stage, and in the trial heating stage, introducing a current pulse with a preset time length into the heating pipe to judge whether the detected temperature is higher than a preset temperature or not; if not, judging that the heating device is dry-burned, and controlling the heating device to enter water shortage treatment; and the preset temperature is more than or equal to the detection temperature before trial heating of the heating device.
A heating device further comprises a circuit control board, wherein the circuit control board is integrated with a control unit, and the control unit is provided with the control method of the heating device.
An intelligent closestool comprises the heating device.
The invention relates to a heating device, an intelligent closestool and a control method of the heating device.A trial heating stage is set before a normal heating stage, and a heating pipe is introduced with a current pulse with set duration; if the detected temperature of the water temperature sensor is judged to be not higher than the preset temperature, the heating device is judged to be dry-burned, and the heating device is controlled to enter water shortage treatment; the dry burning judgment is carried out by combining the impeller and the trial heating stage, so that the dry burning is reduced, and the service life of the heating device is prolonged; and meanwhile, the judgment error is reduced.
Drawings
FIG. 1 is a time-series graph of flow, heating and sensed temperature during a water-free flow;
FIG. 2 is a time-series diagram of flow, heating and temperature measurements during normal water flow;
FIG. 3 is a time series diagram of flow, heating and sensed temperature during a sudden water shut down;
FIG. 4 is a control flow diagram of a first embodiment of a control method;
FIG. 5 is a control flow diagram of a second embodiment of the control method;
FIG. 6 is a control flow diagram of a third embodiment of the control method;
FIG. 7 is a control flow diagram of a fourth embodiment of a control method;
FIG. 8 is a control flow diagram of the control method during a sudden water cut;
fig. 9 is a schematic structural view of an embodiment of the heating apparatus.
Detailed Description
The invention will be further described with reference to the following figures and specific examples:
referring to fig. 8, the heating apparatus 100 includes a heating pipe 101, an outlet water temperature sensor 102, a circuit control board 103, a flow rate measuring part 104, an inlet pipe 107 and an outlet pipe 108; the flow rate measuring part 104 comprises an impeller, when water flows through the flow rate measuring part, the impeller can rotate, water flows into the heating pipe 101 through the water inlet pipe 107, the water flows through the heating pipe pass through the water outlet temperature sensor 102, and the water flows through the water outlet temperature sensor leave the heating device through the water outlet pipe 108; the circuit control board 103 may be an MCU control board. The circuit control board 103 includes a power control unit for controlling the power of the heating pipe 101 and an outlet water temperature control unit for controlling the outlet water temperature sensor 104. In addition, the circuit control board 103 further includes a serial communication port for receiving an external command, a control unit for controlling a thyristor or an IGBT device having a large power, and the like.
In order to prevent the heating device from being dried for a long time and prolong the service life of the heating device, the invention provides a control method of the heating device, and the control method is combined with and shown in fig. 1 and fig. 4, the control method comprises a trial heating stage and a normal heating stage, the trial heating stage is positioned before the normal heating stage, and the control method comprises the following steps in the trial heating stage:
starting; the heating device enters a working state for preparation, and comprises a circuit control board 103 for receiving electric signals and control signals and an outlet water temperature sensor for electric connection;
judging whether the rotating speed of the impeller reaches a preset rotating speed or not, if so, entering a normal heating stage, and if not, entering a trial heating stage; the trial heating phase comprises the following steps:
introducing a current pulse with a preset time length, and introducing the current pulse with the preset time length into the heating pipe by the power control unit, wherein in the embodiment, the preset time length of the introduced current pulse is defined as t 1;
detecting the temperature of the outlet of the heating pipe, measuring the temperature of the outlet of the heating pipe by using the water outlet temperature sensor to form a detection temperature, judging whether the detection temperature is increased to a preset temperature, if not, judging that the heating device is dry-burned, and controlling the heating device to enter water shortage treatment; before the normal heating stage, a short-time current pulse is introduced into the heating pipe, if water flows in the heating pipe, the water temperature is increased, and the detection temperature is increased to a preset temperature, so that the detection temperature forms a temperature pulse; the preset temperature is more than or equal to the detection temperature before trial heating of the heating device; if the detected temperature curve has no temperature pulse and the amplitude of the temperature pulse signal does not reach the preset temperature, the temperature rise of the heating pipe may affect the air temperature around the outlet water temperature sensor when the outlet water temperature sensor has a relatively close heating pipe outlet, so that the detected temperature has a small rise; when the outlet water temperature sensor is far away from the heating pipe, the temperature rise of the heating pipe exceeds the temperature of the air around the outlet water temperature sensor and cannot influence the temperature of the air, the heating device can be judged to be dry-burned without temperature pulse, and the preset temperature is equal to the detection temperature before the heating device tries to heat. The water shortage treatment comprises the steps of detecting whether a water path is connected or not, performing power failure treatment on the heating device, detecting whether the heating pipe works normally or not, giving an alarm and the like.
According to the technical scheme, the water shortage state is detected by using the water outlet temperature sensor of the heating device, other parts are not added, the service life of the heating device is prolonged, and meanwhile, the cost is low; if the heating pipe is lack of water, the heating pipe cannot be damaged due to short trial heating time.
See fig. 2 and 5 in combination; if the detected temperature is increased to the preset temperature, and the time length t of the temperature pulse with the detected temperature higher than the preset temperature is less than or equal to the preset time length and is greater than 0, judging that the water flow of the heating device is normal, and controlling the heating device to enter a normal heating stage; a short-time current pulse is introduced into the heating pipe, if water flows in the heating pipe, the water temperature is increased, and the detection temperature is increased to a preset temperature, so that the detection temperature forms a temperature pulse; the preset temperature is more than or equal to the detection temperature of the heating device before trial heating, and the detection temperature before trial heating is the detection temperature of the heating device before working; therefore, the time interval between the time point when the current pulse ends and the time point when the current pulse normally heats is t2, and t2 is more than t, so that the detection temperature returns to the detection temperature before the test heating after the test heating stage is ended, and the detection precision is higher; t1< t, the heating test time is shorter, which is beneficial to reducing the damage to the heating pipe. In order to further reduce damage to the heating tube, the temperature corresponding to the apex of the temperature pulse is less than the temperature detected during normal heating.
Referring to fig. 2 and fig. 6, in this embodiment, the magnitude of the flow rate Q may also be calculated, and there is a certain corresponding relationship between the flow rate Q and the time length t of the temperature pulse, because the corresponding relationship may be different due to system differences, for a given system, the corresponding relationship may be obtained through actual calibration, and the following functional relationship is obtained: (t), said flow rate increasing with decreasing duration of said temperature pulse; the corresponding relationship can be determined by the calibration data, and certainly, the relationship between the flow rate Q and the time length t of the temperature pulse can also be determined by the data table. When the impeller breaks down, the flow of the heating device is determined through the time length t of the temperature pulse, so that the problem that the flow cannot be measured due to the failure of the impeller is avoided.
With reference to fig. 2 and 7, compared with fig. 5, the method further includes calculating the flow Q between the steps of controlling the heating device to enter the normal heating stage, and when the flow is greater than or equal to the preset flow, entering the normal heating stage, that is, under the conditions that the detected temperature is increased to the preset temperature, the time t of the temperature pulse when the detected temperature is higher than the detected temperature before the test heating is less than or equal to the preset time and greater than 0, and the flow is greater than or equal to the preset flow, controlling the heating device to enter the normal heating stage, so that the water flow in the heating tube is ensured, and meanwhile, the water flow is ensured to reach a certain flow requirement, the control precision of the heating device is further improved, the heating temperature is prevented from being too high, and the use comfort of a user is improved.
Referring to fig. 3 and 8 in combination, when the water supply system suddenly stops supplying water, the flow rate is suddenly reduced and approaches to zero, the water temperature is increased because the power of the heating pipe is not changed, the detected temperature corresponding to the power input to the heating pipe is defined as the normal temperature, and when the detected temperature is higher than the preset range of the normal temperature, the water supply system is determined to be in the water stop state, the heating pipe is controlled to be powered off, and the damage to the heating device is reduced; meanwhile, an alarm can be given; the influence of abnormal temperature on the comfort of the user is prevented. The change of the flow is obtained by monitoring the detection temperature through the water outlet temperature sensor, so that sudden water cut-off is found, the service life of the heating device is prolonged, and the use comfort of a user is improved.
In addition, the water supply cut-off state can be judged by suddenly reducing the rotating speed of the impeller to a preset range, the heating pipe is controlled to be powered off, and the damage to the heating device is reduced; meanwhile, an alarm can be given; the influence of abnormal temperature on the comfort of the user is prevented.
The heating device can be applied to the intelligent closestool and is used for heating water circulation of the intelligent closestool.
It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.
Claims (10)
1. A control method of a heating device comprises a heating pipe, an outlet water temperature sensor and a flow metering part, wherein the flow metering part comprises an impeller, and the outlet water temperature sensor can measure the temperature of water flow at the outlet of the heating pipe and form a detection temperature; the flow metering part is communicated with the heating pipe, the control method comprises the steps of judging whether the rotating speed of the impeller reaches a preset rotating speed or not, if so, entering a normal heating stage, if not, entering a trial heating stage, and in the trial heating stage, introducing a current pulse with a preset time length into the heating pipe to judge whether the detected temperature is higher than a preset temperature or not; if not, judging that the heating device is dry-burned, and controlling the heating device to enter water shortage treatment; and the preset temperature is more than or equal to the detection temperature before trial heating of the heating device.
2. The control method according to claim 1, characterized in that: and if the detected temperature is judged to be increased to the preset temperature, and the time length of the temperature pulse when the detected temperature is higher than the preset temperature is detected to be less than or equal to a preset time length and greater than 0, judging that the water flow of the heating device is normal, and controlling the heating device to enter a normal heating stage.
3. The control method according to claim 2, characterized in that: the duration of the current pulse is less than the duration of the temperature pulse, and the duration of the temperature pulse is less than the ending time point of the current pulse to the starting point of the normal heating stage.
4. The control method according to claim 2 or 3, characterized in that: the preset temperature value is less than or equal to the detection temperature value corresponding to the normal heating stage.
5. The control method according to claim 4, characterized in that: the control method further includes a flow rate detection step of the heating device, the flow rate detection step being located after the "determining that the detected temperature is increased to the preset temperature" before the heating device is controlled to enter a normal heating phase "and detecting that a time period of a temperature pulse in which the detected temperature is higher than the preset temperature is less than or equal to a predetermined time period and greater than 0", the flow rate detection including calculating a flow rate through the heating pipe, the flow rate decreasing and increasing as the time period of the temperature pulse increases; when the flow is judged to be larger than or equal to the preset flow, controlling the heating device to enter a normal heating stage; and when the flow is judged to be smaller than the preset flow, controlling the heating device to enter water shortage treatment.
6. The control method according to claim 1, characterized in that: the control method further comprises a flow detection step of the heating device, the flow detection comprising calculating a flow through the heating tube, the flow decreasing with increasing duration of the temperature pulse.
7. The control method according to claim 5 or 6, characterized in that: the flow of the heating device and the duration of the temperature pulse have a certain corresponding relation; the correspondence may be different because of system differences, and for a given system, the correspondence may be obtained through actual calibration.
8. The control method according to any one of claims 1 to 7, characterized in that: in the operation process, the detection temperature corresponding to the power input to the heating pipe is defined as a normal temperature, and when the detection temperature acquired by the water outlet temperature sensor is higher than a normal temperature preset range, the heating device is judged to stop water supply, and the heating device is controlled to stop heating.
9. A heating device comprising an electric control board integrated with a control unit having a control method of the heating device of any one of claims 1-8.
10. An intelligent toilet comprising the heating device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910845071.4A CN112460808B (en) | 2019-09-07 | 2019-09-07 | Control method of heating device, heating device and intelligent closestool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910845071.4A CN112460808B (en) | 2019-09-07 | 2019-09-07 | Control method of heating device, heating device and intelligent closestool |
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| Publication Number | Publication Date |
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| CN112460808A true CN112460808A (en) | 2021-03-09 |
| CN112460808B CN112460808B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910845071.4A Active CN112460808B (en) | 2019-09-07 | 2019-09-07 | Control method of heating device, heating device and intelligent closestool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126592A (en) * | 2021-03-12 | 2021-07-16 | 浙江喜尔康智能家居股份有限公司 | Fault detection system for intelligent closestool heating loop |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932217Y (en) * | 2006-07-12 | 2007-08-08 | 陈振圳 | Dry combusting preventing electric water heater capable of controlling flow |
| JP2009145007A (en) * | 2007-12-17 | 2009-07-02 | Mitsubishi Electric Corp | Heat pump water heater |
| CN102589142A (en) * | 2012-03-14 | 2012-07-18 | 美的集团有限公司 | Dry burning prevention device of liquid pipeline electromagnetic induction heating device and control method thereof |
| CN103994583A (en) * | 2014-06-17 | 2014-08-20 | 山东润泰智能电气有限公司 | Quick-heating type electric water heater and heating method thereof |
-
2019
- 2019-09-07 CN CN201910845071.4A patent/CN112460808B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2932217Y (en) * | 2006-07-12 | 2007-08-08 | 陈振圳 | Dry combusting preventing electric water heater capable of controlling flow |
| JP2009145007A (en) * | 2007-12-17 | 2009-07-02 | Mitsubishi Electric Corp | Heat pump water heater |
| CN102589142A (en) * | 2012-03-14 | 2012-07-18 | 美的集团有限公司 | Dry burning prevention device of liquid pipeline electromagnetic induction heating device and control method thereof |
| CN103994583A (en) * | 2014-06-17 | 2014-08-20 | 山东润泰智能电气有限公司 | Quick-heating type electric water heater and heating method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126592A (en) * | 2021-03-12 | 2021-07-16 | 浙江喜尔康智能家居股份有限公司 | Fault detection system for intelligent closestool heating loop |
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| CN112460808B (en) | 2023-08-22 |
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