CN108954849B - Control method and control system for open type heat storage water tank of electronic toilet - Google Patents
Control method and control system for open type heat storage water tank of electronic toilet Download PDFInfo
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- CN108954849B CN108954849B CN201811077226.6A CN201811077226A CN108954849B CN 108954849 B CN108954849 B CN 108954849B CN 201811077226 A CN201811077226 A CN 201811077226A CN 108954849 B CN108954849 B CN 108954849B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 954
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005338 heat storage Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 120
- 239000007788 liquid Substances 0.000 claims abstract description 84
- 230000001502 supplementing effect Effects 0.000 claims abstract description 49
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 238000004891 communication Methods 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 239000008236 heating water Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Classifications
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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
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a control method and a control system of an open type heat storage water tank of an electronic toilet, wherein the control system comprises the following steps: the device comprises a water tank, a water inlet valve, a water suction pump, a liquid level sensor, a heating device and a main control board. The liquid level sensor is used for detecting the water level in the water tank, and the main control board is used for controlling the operation of the water inlet valve, the water suction pump and the heating device according to the detection result of the liquid level sensor; when the liquid level sensor detects that the water level in the water tank rises to the full water level L1, the main control board controls the water inlet valve to be closed so as to stop water injection into the water tank; when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank; when the liquid level sensor detects that the water level in the water tank drops to the water shortage level L3, the main control board controls the water suction pump to stop pumping water in the water tank. The invention can prolong the service life of the heating device, greatly reduce the fluctuation of the water temperature in the water tank and improve the use experience.
Description
Technical Field
The invention relates to a control method and a control system of an open type heat storage water tank of an electronic toilet.
Background
Nowadays, an electronic toilet is increasingly accepted by users, after tap water is heated, the electronic toilet washes human body parts, in the related art, the heating modes of the electronic toilet for flushing water are various, the electronic toilet mainly comprises an instant heating mode and a heat storage type heating mode, a heating device is usually arranged in a water tank, the water tank is basically closed, water inlet and water outlet of the water tank are communicated, and thus, the water outlet pressure is greatly affected by the change of the water inlet pressure, and the use experience of the users is affected.
In order to solve the problems, the prior art adopts an open water tank to isolate the water inlet from the water outlet of the water tank, and the heated water in the water tank is pumped out by a water suction pump to flush the human body part, so that the influence caused by the fluctuation of the water pressure of the water inlet is solved.
However, the problems with open tanks are: the water in the water tank cannot be timely replenished when the water in the water tank is insufficient, and the water in the water tank overflows when the water in the water tank is too much. The heating device in the water tank is often damaged, so that the service life of the heating device is short, the fluctuation of the water temperature is also aggravated, and the user experience is affected.
Disclosure of Invention
In view of the above, the invention provides a control method and a control system for an open type heat storage water tank of an electronic toilet, which can effectively control the water level in the open type heat storage water tank of the electronic toilet, thereby prolonging the service life of a heating device, greatly reducing the water temperature fluctuation in the water tank and improving the use experience of users.
According to an aspect of the present invention, there is provided a control method of an open-type heat storage water tank of an electronic toilet, which controls water inflow of the water tank using a water inflow valve, pumps water in the water tank using a water suction pump, detects a water level in the water tank using a level sensor, and heats the water in the water tank using a heating device;
when the liquid level sensor detects that the water level in the water tank rises to the full water level L1, the main control board controls the water inlet valve to be closed so as to stop filling water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water shortage level L3, the main control board controls the water pump to stop pumping water in the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the anhydrous water level L4, the main control board controls the heating device to stop heating;
the positions of the set full water level L1, the set water supplementing water level L2, the set water shortage level L3 and the set water absence level L4 on the water tank are sequentially from high to low.
Further, when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank, and the method further comprises the following steps:
s1, when the inflow q1 of the water tank is larger than the outflow q2 of the water tank, the water level of the water tank rises to the full water level L1, and the main control board controls the water inlet valve to be closed; when the water suction pump continuously pumps water to enable the water level of the water tank to drop to the water supplementing water level L2 or the water shortage water level L3, the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the water full level L1 again, circulation control is performed in this way, and the main control board controls the water suction pump to be closed until flushing is finished; after the water suction pump is closed, if the water level of the water tank is lower than the water supplementing water level L2, the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the full water level L1, and if the water level of the water tank is higher than or equal to the water supplementing water level L2, the main control board controls the water inlet valve to be closed;
s2, when the inflow q1 of the water tank is smaller than the outflow q2 of the water tank, the main control board controls the water suction pump to be closed when the water level of the water tank is reduced to the water shortage level L3 or below the water shortage level L3 until the water level of the water tank rises to the full water level L1, and controls the water inlet valve to be closed.
Further, in step S1,
when the difference delta q between the inflow water flow q1 of the water tank and the outflow water flow q2 of the water tank is larger than a preset value, the water suction pump continuously pumps water so that the water level of the water tank drops to the water shortage level L3, and the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the full water level L1;
when the difference delta q between the inflow water flow q1 of the water tank and the outflow water flow q2 of the water tank is smaller than a preset value, the water pump continuously pumps water so that the water level of the water tank drops to the water supplementing water level L2, and the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the full water level L1.
Further, in step S2, after the water pump is turned off, if the water level of the water tank does not change significantly within the time period Δt1, an abnormality alarm is sent.
Further, the main control board obtains the time delta t2 for the water level of the water tank to drop from the full water level L1 to the water supplementing level L2 according to the detection result of the liquid level sensor;
q2=（V1-V2）/△t2
wherein V1 is the volume of water when the water tank is at full water level L1;
v2 is the volume of water when the water tank is at the water supplementing level L2;
in step S1, the main control board obtains the time delta t3 for the water level of the water tank to rise from the water supplementing level L2 to the full water level L1 according to the detection result of the liquid level sensor;
q1=（V1-V2）/△t3+ q2；
in step S2, the main control board obtains the time delta t4 for the water level of the water tank to drop from the water supplementing level L2 to the water shortage level L3 according to the detection result of the liquid level sensor;
q1= q2-（V2-V3）/△t4
wherein V2 is the volume of water when the water tank is at the water supplementing water level L2;
v3 is the volume of water when the tank is at the water shortage level L3.
Further, in the initial state, the water level of the water tank is above the water supplementing water level L2, the water suction pump is not started, the heating device controls the water in the water tank to be in a heat preservation state under the preset power, and the water temperature in the water tank is the heat preservation temperature T1;
when the water suction pump is started, the heating device is started to heat the water temperature in the water tank from T1 to a target temperature T2, and the main control board adjusts the heating power of the heating device according to the preset power and the water outlet flow q 2;
when the liquid level sensor detects that the water level in the water tank is reduced, the main control board correspondingly reduces the heating power of the heating device according to the obtained reduction of the water quantity in the water tank;
when the outlet water temperature of the water tank reaches a preset upper limit value, the main control board controls the inlet valve to be opened.
Further, the inner cavity of the water tank is divided into a mixing cavity and a heating cavity which are communicated, the heating device is placed in the heating cavity, water of the water inlet valve is added into the mixing cavity, water flow enters the heating cavity through a communication port between the mixing cavity and the heating cavity, and water flowing into the water tank from the water inlet valve falls into the water tank above the full water level L1.
Further, the liquid level sensor adopts a capacitive liquid level sensor or a reflective ultrasonic liquid level sensor.
According to another aspect of the present invention, there is provided a control system of an open type heat storage water tank of an electronic toilet, comprising:
a water tank for storing water;
the water inlet valve is used for controlling water inlet of the water tank;
the water suction pump is used for pumping water in the water tank to clean the parts of the human body;
the liquid level sensor is used for detecting whether the water level in the water tank is at a set full water level L1, a water supplementing water level L2, a water shortage water level L3 or an anhydrous water level L4, and the positions of the full water level L1, the water supplementing water level L2, the water shortage water level L3 and the anhydrous water level L4 on the water tank are set from high to low in sequence;
the heating device is arranged in the water tank and is used for heating water in the water tank;
the main control board is used for controlling the operation of the water inlet valve, the water suction pump and the heating device according to the detection result of the liquid level sensor;
when the liquid level sensor detects that the water level in the water tank rises to the full water level L1, the main control board controls the water inlet valve to be closed so as to stop filling water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water shortage level L3, the main control board controls the water suction pump to stop pumping water in the water tank.
When the liquid level sensor detects that the water level in the water tank drops to the anhydrous water level L4, the main control board controls the heating device to stop heating.
Further, the main control board obtains the water outlet flow and the water inlet flow of the water tank according to the water level change detected by the liquid level sensor, and combines the obtained temperature of the water in the water tank and the water quantity in the water tank to control the heating power of the heating device.
Further, the inner cavity of the water tank is divided into a mixing cavity and a heating cavity which are communicated, the heating device is placed in the heating cavity, water of the water inlet valve is added into the mixing cavity, and water flow enters the heating cavity through a communication port between the mixing cavity and the heating cavity; the water inlet position of the water inlet valve is above the full water level L1; the liquid level sensor adopts a capacitive liquid level sensor or a reflective ultrasonic liquid level sensor.
The beneficial effects of the invention are as follows: according to the invention, the water level in the water tank is detected by the liquid level sensor, and when the liquid level sensor detects that the water level in the water tank rises to the full water level L1, the main control board controls the water inlet valve to be closed so as to stop water filling into the water tank; when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank; when the liquid level sensor detects that the water level in the water tank drops to the water shortage level L3, the main control board controls the water pump to stop pumping water in the water tank; when the liquid level sensor detects that the water level in the water tank drops to the anhydrous water level L4, the main control board controls the heating device to stop heating; therefore, the water tank cannot overflow due to too much water, the heating device cannot be damaged due to too little water, the service life of the heating device is prolonged, the water temperature fluctuation in the water tank is greatly reduced, and the use experience of a user is improved.
The invention also calculates and obtains the flow values of the water inlet and the water outlet through the time of the water level change, and switches the heating algorithm according to the water inlet and the water outlet, and adjusts the heating power, thereby further reducing the fluctuation of the water outlet temperature.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a flowchart of a control method of an open type heat storage water tank of an electronic toilet according to the present invention;
fig. 2 is a schematic structural view of a control system of an open type heat storage water tank of an electronic toilet according to the present invention.
In the figure:
10-a water tank; 11-a mixing chamber; 12-a heating chamber; 13-overflow port; 14-a communication port; 20-a water inlet valve; 21-a water inlet pipe; 22-water inlet position; 30-a water suction pump; 40-a liquid level sensor; 50-heating device.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
All terms (including technical or scientific terms) used in this disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
Referring to fig. 1, fig. 1 shows a control system of an open type hot water storage tank of an electronic toilet according to an embodiment of the present invention, which includes a water tank 10, a water inlet valve 20, a water pump 30, a liquid level sensor 40, a heating device 50, and a main control board (not shown).
The water tank 10 is an open type water tank for storing water, and herein, the open type water tank refers to a water tank in which a water inlet and a water outlet of the water tank 10 are not directly communicated, and water flowing into the water tank 10 is not directly discharged from the water outlet, but is drawn out by a water pump 30 or the like. The upper part of the side wall of the water tank 10 is provided with an overflow port 13, and if the water in the water tank is full of the overflow port 13, the water flows to the outside from the overflow port 13.
The water inlet valve 20 is used for controlling water inlet of the water tank 10, and is preferably an electromagnetic valve, the water inlet valve 20 is communicated with the water tank 10 through the water inlet pipe 21, the water outlet of the water inlet pipe 21 is positioned at the top of the water tank 10, and the water inlet pipe 21 is also provided with a water inlet temperature sensor for detecting the water inlet temperature of the water tank 10.
The suction pump 30 is used to pump water from the water tank 10 to wash parts of the human body.
The liquid level sensor 40 is used for detecting whether the water level in the water tank is at a set full water level L1, a water supplementing level L2, a water shortage level L3 or an anhydrous level L4, and the positions of the full water level L1, the water supplementing level L2, the water shortage level L3 and the anhydrous level L4 on the water tank 10 are set from high to low in sequence.
The liquid level sensor 40 may be a capacitive liquid level sensor or a reflective ultrasonic liquid level sensor, etc., and the liquid level sensor 40 of different types may be installed on the side of the water tank 10 (as shown in fig. 1) according to different implementation methods, where the capacitive liquid level sensor 40 is installed on the side of the water tank 10, and the reflective distance-detecting liquid level sensor 40 may be selectively installed on the top of the water tank, where the water level of the water tank is detected by detecting the distance between the liquid level of water in the water tank and the liquid level sensor 40. The present embodiment specifically employs a capacitive level sensor.
A heating device 50 is provided in the water tank 10 for heating water in the water tank 10.
The main control board is used for controlling the operation of the water inlet valve 20, the water pump 30 and the heating device 50 according to the detection result of the liquid level sensor 40.
Wherein, when the level sensor 40 detects that the water level in the water tank 10 rises to the full water level L1, the main control board controls the water inlet valve 20 to be closed to stop filling water into the water tank 10;
when the liquid level sensor 40 detects that the water level in the water tank 10 drops to the water supplementing water level L2, the main control board controls the water inlet valve 20 to be opened so as to fill water into the water tank 10;
when the liquid level sensor 40 detects that the water level in the water tank 10 drops to the water shortage level L3, the main control board controls the water suction pump 30 to stop pumping water in the water tank 10;
when the level sensor 40 detects that the water level in the water tank 10 drops to the water-free level L4, the main control board controls the heating device 50 to stop heating.
In this embodiment, the inner cavity of the water tank 10 is divided into a mixing cavity 11 and a heating cavity 12 which are communicated, the heating device 50 is placed in the heating cavity 12, water of the water inlet valve 20 is added into the mixing cavity 11, and water flows into the heating cavity 12 through a communication port 14 between the mixing cavity 11 and the heating cavity 12.
The water inlet position 22 of the water inlet valve 20 is above the full water level L1, that is, the water flowing into the water tank 10 from the water inlet valve 20 falls into the water tank 10 above the full water level L1, so that the water in the water tank 10 does not flow back to the water inlet valve 20 and then flows back to the water supply pipe, and the requirement of anti-siphon in industry can be met without additional anti-siphon devices.
In this embodiment, the main control board obtains the outlet water flow q2 and the inlet water flow q1 of the water tank 10 according to the water level change detected by the liquid level sensor 40, and combines the obtained temperature of the water in the water tank and the water quantity in the water tank to control the heating power of the heating device 50.
Wherein, the water outlet flow q2 can be obtained by the following way:
the main control board obtains the time delta t2 for the water level of the water tank to drop from the full water level L1 to the water supplementing level L2 according to the detection result of the liquid level sensor 40;
q2=（V1-V2）/△t2
wherein V1 is the volume of water when the water tank is at full water level L1;
v2 is the volume of water when the water tank is at the water supplementing level L2;
the water inflow q1 can be obtained as follows:
when the inflow q1 is greater than the outflow q2, the main control board obtains the time Deltat 3 for the water level of the water tank to rise from the water supplementing level L2 to the full water level L1 according to the detection result of the liquid level sensor 40;
q1=（V1-V2）/△t3+ q2；
when the inflow q1 is smaller than the outflow q2, the main control board obtains the time Deltat 4 for the water level of the water tank to drop from the water supplementing level L2 to the water shortage level L3 according to the detection result of the liquid level sensor 40;
q1= q2-（V2-V3）/△t4
wherein V2 is the volume of water when the water tank is at the water supplementing water level L2;
v3 is the volume of water when the tank is at the water shortage level L3.
Meanwhile, the invention also provides a control method of the control system of the open type heat storage water tank based on the electronic toilet, which comprises the steps of controlling water inflow of the water tank 10 by utilizing the water inflow valve 20, pumping water in the water tank 10 by utilizing the water suction pump 30, detecting the water level in the water tank 10 by utilizing the liquid level sensor 40, and heating the water in the water tank 10 by utilizing the heating device 50;
when the liquid level sensor 40 detects that the water level in the water tank 10 rises to the full water level L1, the main control board controls the water inlet valve 20 to be closed to stop filling water into the water tank 10;
when the liquid level sensor 40 detects that the water level in the water tank 10 drops to the water supplementing water level L2, the main control board controls the water inlet valve 20 to be opened so as to fill water into the water tank 10;
when the liquid level sensor 40 detects that the water level in the water tank 10 drops to the water shortage level L3, the main control board controls the water pump 30 to stop pumping water in the water tank 10;
when the liquid level sensor 40 detects that the water level in the water tank 10 drops to the anhydrous water level L4, the main control board controls the heating device 50 to stop heating;
the positions of the set full water level L1, the water supplementing level L2, the water shortage level L3 and the water absence level L4 on the water tank 10 are sequentially from high to low.
Further, when the level sensor 40 detects that the water level in the water tank 10 drops to the water replenishment level L2, the main control board controls the water inlet valve 20 to be opened to fill water into the water tank 10, and then the method further comprises the following steps:
s1, when the inflow q1 of the water tank 10 is larger than the outflow q2 of the water tank 10, the water level of the water tank 10 rises to the full water level L1, and the main control board controls the water inlet valve 20 to be closed; when the water pump 30 continuously pumps water so that the water level of the water tank 10 drops to the water supplementing water level L2 or the water shortage water level L3, the main control board controls the water inlet valve 20 to be opened until the water level of the water tank rises to the water full level L1 again, the circulation control is performed in this way, and the main control board controls the water pump 30 to be closed until the flushing is finished; after the water suction pump 30 is turned off, if the water tank water level is lower than the water replenishing water level L2, the main control board controls the water inlet valve 20 to be opened until the water tank water level rises to the full water level L1, and if the water tank water level is higher than or equal to the water replenishing water level L2, the main control board controls the water inlet valve 20 to be turned off;
s2, when the inflow q1 of the water tank 10 is smaller than the outflow q2 of the water tank 10, the main control board controls the water pump 30 to be turned off when the water level of the water tank drops to the water shortage level L3 or below the water shortage level L3 until the water level of the water tank rises to the full water level L1, and controls the water inlet valve 20 to be turned off.
Further, in step S1,
when the difference delta q between the inflow q1 of the water tank 10 and the outflow q2 of the water tank 10 is larger than a preset value, the water pump 30 continuously pumps water so that the water level of the water tank drops to the water shortage level L3, and the main control board controls the water inlet valve 20 to be opened until the water level of the water tank rises to the full water level L1;
when the difference deltaq between the inflow q1 of the water tank 10 and the outflow q2 of the water tank 10 is smaller than a preset value, the water pump 30 continuously pumps water so that the water level of the water tank drops to the water replenishing level L2, and the main control board controls the water inlet valve 20 to open until the water level of the water tank rises to the full water level L1.
That is, when the difference Δq between the water inflow q1 and the water outflow q2 is greater than the preset value, it indicates that the water inflow of the water tank 10 is faster, and at this time, the water inlet valve 20 is opened when the water level of the water tank is selected to drop to the water shortage level L3, so that the water level in the water tank 10 is prevented from rising to the full water level L1 quickly, and the water inlet valve 20 is closed again, thereby causing frequent opening and closing of the water inlet valve 20 and being unfavorable for the service life of the water inlet valve 20. When the difference Δq between the inflow q1 and the outflow q2 is smaller than the preset value, it indicates that the inflow of the water tank 10 is slow, and at this time, the water inlet valve 20 is opened when the water level of the water tank is selected to drop to the water replenishing level L2, so as to avoid damaging the heating device 50 due to the fact that the water level in the water tank is pumped down due to too fast outflow.
In this embodiment, in step S2, after the water pump 30 is turned off, if the water level of the water tank does not change significantly in the time period Δt1, an abnormal alarm is sent out, and the abnormal alarm may be implemented by flashing a light or sending out a prompt sound.
Based on the above method, in the flowchart of fig. 2, a control flowchart of the main control board according to the detection result of the liquid level sensor 40 on the water level of the water tank is shown.
In the initial state, the water level of the water tank 10 is above the water supplementing water level L2, the water pump 30 is not started, the heating device 50 controls the water in the water tank 10 to be in a heat preservation state under the preset power, and at the moment, the water temperature in the water tank 10 is the heat preservation temperature T1;
when the water suction pump 30 is started, the heating device 50 is started to heat the water temperature in the water tank 10 from T1 to a target temperature T2, and the main control board adjusts the heating power of the heating device 50 according to the preset power and the water outlet flow q 2;
wherein, the water outlet flow q2 can be obtained by the following way:
the main control board obtains the time delta t2 for the water level of the water tank to drop from the full water level L1 to the water supplementing level L2 according to the detection result of the liquid level sensor 40;
water flow rate q2= (V1-V2)/[ delta ] t2
Wherein V1 is the volume of water when the water tank is at full water level L1;
v2 is the volume of water when the water tank is at the water supplementing level L2;
the water inflow q1 can be obtained as follows:
in step S1, the main control board obtains the time Δt3 for the water tank level to rise from the water replenishment level L2 to the full water level L1 according to the detection result of the liquid level sensor 40;
q1=（V1-V2）/△t3+ q2；
in step S2, the main control board obtains the time Δt4 for the water tank level to drop from the water replenishment level L2 to the water shortage level L3 according to the detection result of the liquid level sensor 40;
q1= q2-（V2-V3）/△t4
wherein V2 is the volume of water when the water tank is at the water supplementing water level L2;
v3 is the volume of water when the tank is at the water shortage level L3.
When the suction pump 30 is turned on and the water intake valve 20 is turned off:
Q heating device = c*k*q2*（T2-T1）=Q Effluent water
Wherein Q is Heating device Lifting the heating device 50Heat supplied;
c is the specific heat capacity constant of water;
q2 is the water outlet flow;
k is the proportionality coefficient of the mass and the flow of water;
t2 is the target temperature;
t1 is the heat preservation temperature;
at this time, the energy Q provided by the heating device Heating device One part of the supplied water absorbs heat and the other part of the supplied water in the water tank 10 gradually increases the temperature of the remaining water in the water tank 10. Heat quantity Q absorbed by effluent Effluent water Reducing the heat Q provided by the heating device Heating device The water tank 10 is correspondingly reduced, and the heat transfer of the heating device is lagged, so that the heating needs to be stopped in advance to prevent the surplus water temperature in the water tank 10 from being ultrahigh;
when the suction pump 30 is turned on, the water intake valve 20 is also turned on:
Q heating device =c* k*q2*（T2-T3）+ c* k* q1*（T2-T4）=Q Effluent water +Q Inflow of water
Wherein Q is Heating device Heat provided to the heating device 50;
c is the specific heat capacity constant of water;
q2 is the water outlet flow;
k is the proportionality coefficient of the mass and the flow of water;
t2 is the target temperature;
t3 is the outlet water temperature;
t4 is the current water temperature of the water tank.
At this time, the energy Q provided by the heating device Heating device It is also necessary to raise the temperature of the incoming water to the current temperature T4 of the tank 10 so that the temperature of the water in the tank 10 remains substantially unchanged, if the heating means provides less heat than the amount of heat required to be absorbed by the incoming water (Q Heating device < Q Inflow of water ) The temperature of the water tank 10 can not reach the current water temperature T4 after the water is fed to absorb the heat of the heating device, the temperature in the water tank 10 is reduced, the T2 value is reduced under the condition that the heating power of the heating device is unchanged, and the water temperature in the water tank is reduced by the water feedingThe difference between the heat required by the water and the heat absorbed is obtained.
According to the algorithm, the main control board can adjust the heating power of the heating device 50 on the basis of the preset power of the heating device 50, so that the outlet water temperature of the water tank 10 is more stable and reliable.
When the liquid level sensor 40 detects the water level drop in the water tank 10, the main control board correspondingly reduces the heating power of the heating device 50 according to the obtained reduction amount of the water amount in the water tank 10.
When the water outlet temperature of the water tank 10 reaches the preset upper limit value, the main control board controls the water inlet valve 20 to be opened, so that the water outlet temperature is reduced, the water outlet temperature is ensured to be within the preset range, and the human body is prevented from being scalded. The water outlet temperature is obtained by detecting a water outlet temperature sensor arranged in the water tank, and the water outlet temperature sensor sends the detected water temperature value to the main control board.
Optionally, in step S2, when the water level of the water tank drops to the anhydrous water level L4 below the water shortage level L3, the main control board controls the water pump 30 to be turned off, and controls the heating device 50 to be turned off.
In order to reduce the temperature variation of water in the water tank, the inner cavity of the water tank 10 is divided into a mixing cavity 11 and a heating cavity 12 which are communicated, the heating device 50 is placed in the heating cavity 12, water of the water inlet valve 20 is added into the mixing cavity 11, and water flows into the heating cavity 12 through a communication port 14 between the mixing cavity 11 and the heating cavity 12, so that the water entering the water tank 10 and the water in the water tank 10 are fully mixed, and the water temperature is more stable.
Thus, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concepts of the invention, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
While the foregoing description illustrates and describes the preferred embodiments of the present invention, as noted above, it is to be understood that the invention is not limited to the forms disclosed herein but is not to be construed as excluding other embodiments, and that various other combinations, modifications and environments are possible and may be made within the scope of the inventive concepts described herein, either by way of the foregoing teachings or by those of skill or knowledge of the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (7)
1. A control method of an open type heat storage water tank of an electronic toilet is characterized by comprising the following steps:
controlling water inlet of the water tank by utilizing a water inlet valve, pumping water in the water tank by utilizing a water pump, detecting the water level in the water tank by utilizing a liquid level sensor, and heating the water in the water tank by utilizing a heating device;
when the liquid level sensor detects that the water level in the water tank rises to the full water level L1, the main control board controls the water inlet valve to be closed so as to stop filling water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water shortage level L3, the main control board controls the water pump to stop pumping water in the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the anhydrous water level L4, the main control board controls the heating device to stop heating; the set full water level L1, the set water supplementing water level L2, the set water shortage level L3 and the set water absence level L4 are sequentially arranged from high to low on the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank, and the method further comprises the following steps:
s1, when the inflow q1 of the water tank is larger than the outflow q2 of the water tank, the water level of the water tank rises to the full water level L1, and the main control board controls the water inlet valve to be closed; when the water suction pump continuously pumps water to enable the water level of the water tank to drop to the water supplementing water level L2 or the water shortage water level L3, the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the water full level L1 again, circulation control is performed in this way, and the main control board controls the water suction pump to be closed until flushing is finished; after the water suction pump is closed, if the water level of the water tank is lower than the water supplementing water level L2, the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the full water level L1, and if the water level of the water tank is higher than or equal to the water supplementing water level L2, the main control board controls the water inlet valve to be closed;
s2, when the inflow q1 of the water tank is smaller than the outflow q2 of the water tank, the main control board controls the water suction pump to be closed when the water level of the water tank is reduced to the water shortage level L3 or below the water shortage level L3 until the water level of the water tank rises to the full water level L1, and controls the water inlet valve to be closed;
in the step S1 of the process,
when the difference delta q between the inflow water flow q1 of the water tank and the outflow water flow q2 of the water tank is larger than a preset value, the water suction pump continuously pumps water so that the water level of the water tank drops to the water shortage level L3, and the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the full water level L1;
when the difference delta q between the inflow water flow q1 of the water tank and the outflow water flow q2 of the water tank is smaller than a preset value, the water pump continuously pumps water so that the water level of the water tank drops to the water supplementing water level L2, and the main control board controls the water inlet valve to be opened until the water level of the water tank rises to the full water level L1;
in the initial state, the water level of the water tank is above the water supplementing water level L2, the water suction pump is not started, the heating device controls the water in the water tank to be in a heat preservation state under the preset power, and the water temperature in the water tank is the heat preservation temperature T1 at the moment;
when the water suction pump is started, the heating device is started to heat the water temperature in the water tank from T1 to a target temperature T2, and the main control board adjusts the heating power of the heating device according to the preset power and the water outlet flow q 2;
when the liquid level sensor detects that the water level in the water tank is reduced, the main control board correspondingly reduces the heating power of the heating device according to the obtained reduction of the water quantity in the water tank;
when the outlet water temperature of the water tank reaches a preset upper limit value, the main control board controls the inlet valve to be opened.
2. The control method of the open type heat storage water tank of the electronic toilet according to claim 1, wherein: in the step S2, after the water pump is turned off, the water level of the water tank does not change obviously within the time period delta t1, and an abnormal alarm is sent out.
3. The control method of the open type heat storage water tank of the electronic toilet according to claim 1, wherein: the main control board obtains the time delta t2 for the water level of the water tank to drop from the full water level L1 to the water supplementing level L2 according to the detection result of the liquid level sensor; q2= (V1-V2)/. DELTA.t2
Wherein V1 is the volume of water when the water tank is at full water level L1;
v2 is the volume of water when the water tank is at the water supplementing level L2;
in step S1, the main control board obtains the time delta t3 for the water level of the water tank to rise from the water supplementing level L2 to the full water level L1 according to the detection result of the liquid level sensor;
q1＝(V1-V2)/△t3+q2；
in step S2, the main control board obtains the time delta t4 for the water level of the water tank to drop from the water supplementing level L2 to the water shortage level L3 according to the detection result of the liquid level sensor;
q1＝q2-(V2-V3)/△t4
wherein V2 is the volume of water when the water tank is at the water supplementing water level L2;
v3 is the volume of water when the tank is at the water shortage level L3.
4. The control method of the open type heat storage water tank of the electronic toilet according to claim 1, wherein: the inner cavity of the water tank is divided into a mixing cavity and a heating cavity which are communicated, the heating device is placed in the heating cavity, water of the water inlet valve is added into the mixing cavity, water flow enters the heating cavity through a communication port between the mixing cavity and the heating cavity, and water flowing into the water tank from the water inlet valve falls into the water tank above the full water level L1.
5. The control method of the open type heat storage water tank of the electronic toilet according to claim 1, wherein: the liquid level sensor adopts a capacitive liquid level sensor or a reflective ultrasonic liquid level sensor.
6. A control system of an open type heat storage water tank of an electronic toilet is characterized in that: comprising the following steps:
a water tank for storing water;
the water inlet valve is used for controlling water inlet of the water tank;
the water suction pump is used for pumping water in the water tank to clean the parts of the human body;
the liquid level sensor is used for detecting whether the water level in the water tank is at a set full water level L1, a water supplementing water level L2, a water shortage water level L3 or an anhydrous water level L4, and the positions of the full water level L1, the water supplementing water level L2, the water shortage water level L3 and the anhydrous water level L4 on the water tank are set from high to low in sequence;
the heating device is arranged in the water tank and is used for heating water in the water tank;
the main control board is used for controlling the operation of the water inlet valve, the water suction pump and the heating device according to the detection result of the liquid level sensor; when the liquid level sensor detects that the water level in the water tank rises to the full water level L1, the main control board controls the water inlet valve to be closed so as to stop filling water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water supplementing water level L2, the main control board controls the water inlet valve to be opened so as to fill water into the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the water shortage level L3, the main control board controls the water suction pump to stop pumping water in the water tank;
when the liquid level sensor detects that the water level in the water tank drops to the anhydrous water level L4, the main control board controls the heating device to stop heating;
the control system of the open type heat storage water tank of the electronic toilet adopts the control method of the open type heat storage water tank of the electronic toilet according to any one of claims 1 to 5.
7. The control system of the open type heat storage water tank of the electronic toilet according to claim 6, wherein: the inner cavity of the water tank is divided into a mixing cavity and a heating cavity which are communicated, the heating device is placed in the heating cavity, water of the water inlet valve is added into the mixing cavity, and the water enters the heating cavity through a communication port between the mixing cavity and the heating cavity;
the main control board obtains the water outlet flow and the water inlet flow of the water tank according to the water level change detected by the liquid level sensor, and combines the obtained temperature of the water in the water tank and the water quantity in the water tank to control the heating power of the heating device;
the water inlet position of the water inlet valve is above the full water level L1;
the liquid level sensor adopts a capacitive liquid level sensor or a reflective ultrasonic liquid level sensor.
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| CN110332715A (en) * | 2019-06-04 | 2019-10-15 | 广州咖宇智能科技有限公司 | The method for heating and controlling of mixing beverage-making apparatus hot-water heating system |
| JP7457796B2 (en) * | 2019-09-27 | 2024-03-28 | 厦門科牧智能技術有限公司 | Heating equipment, sanitary water supply equipment and sanitary washing equipment |
| CN110593372A (en) * | 2019-09-27 | 2019-12-20 | 厦门科牧智能技术有限公司 | Self-checking method and working method of sanitary cleaning device |
| JP7455194B2 (en) | 2019-09-27 | 2024-03-25 | 厦門科牧智能技術有限公司 | Water storage devices, sanitary water supply devices, and sanitary cleaning devices that prevent siphon action |
| CN112998523B (en) * | 2019-12-19 | 2022-12-06 | 九阳股份有限公司 | Water inlet detection method of food processor and food processor |
| CN111896282B (en) | 2020-06-28 | 2022-08-12 | 厦门科牧智能技术有限公司 | Waterway self-checking method and device |
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