CN115448391B - Heat-purifying all-in-one machine and heating control method thereof - Google Patents

Heat-purifying all-in-one machine and heating control method thereof Download PDF

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Publication number
CN115448391B
CN115448391B CN202211066430.4A CN202211066430A CN115448391B CN 115448391 B CN115448391 B CN 115448391B CN 202211066430 A CN202211066430 A CN 202211066430A CN 115448391 B CN115448391 B CN 115448391B
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heating body
booster pump
flow
heating
back pressure
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CN115448391A (en
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陈建华
邓愿
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Ningbo Fotile Kitchen Ware Co Ltd
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Ningbo Fotile Kitchen Ware Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/005—Valves
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Flow Control (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

The utility model relates to a heat-purifying all-in-one machine, which comprises: the water purification module comprises a first pipeline and a filter element assembly arranged on the first pipeline, wherein the filter element assembly comprises an input end and an output end, and the input end of the filter element assembly is provided with a booster pump; the heating module comprises a second pipeline and a heating body arranged in the second pipeline, the second pipeline is provided with a water inlet and a water outlet, the water inlet is communicated with the output end of the filter element assembly, and the heating body is arranged between the water inlet and the water outlet; the method is characterized in that: further comprises: the throttle valve is arranged on the second pipeline and is positioned between the water inlet of the second pipeline and the heating body. The heating control method of the heat-purifying all-in-one machine is also disclosed. The advantages are that: by using a throttle valve behind the filter element assembly to replace part of the waterway component, the secondary pollution problem caused by the existence of the water purifying tank is avoided; meanwhile, the volume part of the clean water tank is removed, so that the volume of the purification system can be greatly increased, and the flow can be greatly improved.

Description

Heat-purifying all-in-one machine and heating control method thereof
Technical Field
The utility model relates to the technical field of water purifying equipment, in particular to a heat purifying integrated machine and a heating control method thereof.
Background
The heat-purifying all-in-one is a novel water purifier integrating water purification and heating functions, and the current heat-purifying all-in-one mainly comprises the following working processes: the water of the raw water tank is pressurized by the booster pump, the pressurized water is sent to the filter element for filtering, the filtered water is stored in the clean water tank, when a user needs to use, the clean water is pumped out of the clean water tank by the water suction pump, then enters the heating body, and flows out after being heated by the heating body. The pure heat all-in-one machine heats the pure water flowing through the heating body in an instant heating mode, and in practical application, the pure water flow of the pure heat all-in-one machine is small, so that the requirement of a user cannot be met.
In order to solve the above technical problems, chinese utility model, for example, patent No. ZL202121434001.9 (grant publication No. CN 215161123U) discloses a desk type water purifier, which comprises: the water purification device comprises a water purification main body, wherein a filter element assembly is arranged in the water purification main body; a heating device connected to the water purifying body; and the water storage device is detachably arranged on the heating device, the heating device is used for heating the water storage device, and the water outlet of the filter element assembly is communicated with the water storage device when the water storage device is arranged on the heating device. In the water purifier, due to the existence of the water storage device, the flow of the filtering system of the front waterway can be properly reduced, and the cost and the volume of the filtering system are saved. Meanwhile, the water storage device occupies a relatively large space necessarily; in addition, the volume of the water purifying system is necessarily compressed, otherwise, the effects of large flow and small volume cannot be achieved. Therefore, further improvements to the existing net heat integrated machine are needed.
Disclosure of Invention
The first technical problem to be solved by the utility model is to provide a heat-purifying integrated machine which can reduce the volume and increase the water outlet flow rate at the same time aiming at the prior art.
The second technical problem to be solved by the present utility model is to provide a control method of the above-mentioned heat-purifying integrated machine for the above-mentioned prior art.
The technical scheme adopted by the utility model for solving the first technical problem is as follows: a net heat all-in-one machine, comprising:
the water purification module comprises a first pipeline and a filter element assembly arranged on the first pipeline, wherein the filter element assembly comprises an input end and an output end, and the input end of the filter element assembly is provided with a booster pump;
the heating module comprises a second pipeline and a heating body arranged in the second pipeline, the second pipeline is provided with a water inlet and a water outlet, the water inlet is communicated with the output end of the filter element assembly, and the heating body is positioned between the water inlet and the water outlet;
the method is characterized in that: further comprises:
the throttle valve is arranged on the second pipeline and is positioned between the water inlet of the second pipeline and the heating body.
Preferably, the throttle valve is a back pressure valve.
In order to realize the detection of the water inlet temperature and the water outlet temperature of the heating body, the device further comprises a first temperature detection module for detecting the water inlet temperature of the heating body and a second temperature detection module for detecting the water outlet temperature of the heating body.
The device also comprises a flowmeter for detecting the water inflow of the heating body.
In order to realize the water outlet temperature and flow control of the heat-purifying integrated machine, a first preferable mode in the utility model is as follows: the valve opening of the back pressure valve is fixed, and the power supply voltage of the booster pump is adjustable.
In order to realize the water outlet temperature and flow control of the heat-purifying integrated machine, a second mode which is preferable in the utility model is as follows: the valve opening of the back pressure valve is adjustable, and the power supply voltage of the booster pump is fixed.
In order to realize the water outlet temperature and flow control of the heat-purifying integrated machine, a third preferred mode in the utility model is as follows: the valve opening of the back pressure valve is adjustable, and the power supply voltage of the booster pump is adjustable.
The utility model solves the second technical problem by adopting the technical proposal that: the heating control method of the heat-purifying integrated machine is characterized by comprising the following steps of:
step 1, acquiring the water inlet temperature of a heating body and the power of the heating body, and calculating to obtain the initial heating flow F of the heating body according to the water inlet temperature of the heating body, the preset water outlet temperature of the heating body and the power of the heating body 0 ；
Step 2, setting the flow F expected to be intercepted by the back pressure valve Pre-preparation According to the trapped flow F Pre-preparation Calculating to obtain the maximum valve opening value of the back pressure valve;
step 3, according to the initial heating flow F of the heating body 0 And the flow rate F expected to be intercepted by the back pressure valve Pre-preparation Calculating to obtain the quantitative flow F of the booster pump 1 According to the relation between the flow rate of the booster pump and the power supply voltage of the booster pump, acquiring the quantitative flow rate F of the booster pump 1 The corresponding booster pump supply voltage;
step 4, firstly opening the valve opening of the back pressure valve to the maximum value in the step 2, then using the booster pump voltage in the step 3 to supply power to the booster pump, and detecting the data of the flowmeter in real time after the booster pump is powered;
step 5, judging whether the flowmeter has data, if so, starting a heating body, and turning to step 6; if not, continuing to detect the flowmeter, and continuing to perform the step 5;
step 6, adjusting the power of the heating body through a PID algorithm;
step 7, detecting the water outlet temperature of the heating body in real time, judging whether the water outlet temperature of the heating body reaches the preset water outlet temperature of the heating body in the step 1 after the water outlet temperature of the heating body is stable, and if so, switching to the step 8; if not, go to step 10;
step 8, the current valve opening of the back pressure valve is increased, and then the power supply voltage of the booster pump is adjusted through a PID algorithm;
step 9, judging whether the current valve opening of the back pressure valve reaches the maximum value, if so, recording the current power of the heating body, the valve opening of the back pressure valve and the corresponding value of the power supply voltage of the booster pump as the reference parameter of the next time of the heat-purifying integrated machine; if not, turning to step 6;
and 10, adjusting the valve opening of the back pressure valve through a PID algorithm, and switching to the step 6.
In order to solve the problem that enough flow allowance is left after the booster pump passes through the filter element assembly, the booster pump in the step 3 quantifies the flow F 1 The calculation formula of (2) is as follows:
F 1 ＝(F pre-preparation +F 0 )*N；
Wherein N is a preset coefficient, and N is more than 1.
In order to obtain the relationship between the flow rate of the booster pump and the booster pump supply voltage, in the step 3, the valve opening of the back pressure valve is opened to the maximum in advance, and the booster pump flow rates under different values are obtained by recording the booster pump supply voltage, so as to obtain the relationship between the flow rate of the booster pump and the booster pump supply voltage.
Compared with the prior art, the utility model has the advantages that: by using a throttle valve behind the filter element assembly to replace part of the waterway component, the secondary pollution problem caused by the existence of the water purifying tank is avoided; meanwhile, the volume part of the water purifying tank is removed, so that the volume of the purifying system can be greatly increased, and the flow rate can be greatly improved; and the water purifying tank is directly heated or discharged after being directly removed by the purifying system, so that the limit of a water tank is avoided, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of a heat-purifying and integrating machine according to an embodiment of the present utility model;
fig. 2 is a flow chart of heating control of the heat-purifying and integrating machine according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the embodiments of the drawings.
As shown in fig. 1, the net heat integrated machine in the present embodiment includes a water purification module 1 and a heating module 2. The water purifying module 1 comprises a first pipeline 11 and a filter element assembly 12 arranged on the first pipeline 11, wherein the filter element assembly 12 is a composite filter element commonly used in the prior art, and a repeated description is not needed to be unfolded again; the filter element assembly 12 comprises an input end and an output end, and the input end of the filter element assembly 12 is provided with a booster pump 13; the heating module 2 comprises a second pipeline 21 and a heating body 22 arranged in the second pipeline 21, the second pipeline 21 is provided with a water inlet and a water outlet, the water inlet is communicated with the output end of the filter element assembly 12, and the heating body 22 is positioned between the water inlet and the water outlet; a throttle valve 23 is also mounted on the second line 21, the throttle valve 23 being located between the water inlet of the second line 21 and the heating body 22. In this embodiment, the throttle valve 23 is a back pressure valve.
Of course, the water purifying module 1 also comprises a water storage tank 14, a flushing electromagnetic valve 15 and a first one-way valve 16; in order to realize heating control of the heat-purifying all-in-one machine, the heat-purifying all-in-one machine further comprises a first temperature detection module 24 for detecting the water inlet temperature of the heating body, a second temperature detection module 25 for detecting the water outlet temperature of the heating body and a flowmeter 26 for detecting the water inlet flow rate of the heating body. In this embodiment, the first temperature detecting module 24 and the second temperature detecting module 25 are conventional temperature sensors. Of course, the second conduit 21 is also fitted with a water-vapor separation module 26 and a second one-way valve 27 adjacent the water outlet.
Above-mentioned integral water route workflow flow of net heat all-in-one: (1) the flushing solenoid valve 15 is opened, the back pressure valve is closed, the booster pump 13 is opened to flush the filter element assembly 12, and the flushing device is mainly used in the scenes of initial power-on, water outlet use, regular period and the like; (2) opening a back pressure valve, closing a flushing electromagnetic valve 15, opening a booster pump 13, and directly discharging cold water; (3) the flushing solenoid valve 15 is closed, the valve opening of the back pressure valve is adjusted, the voltage of the booster pump 13 is adjusted, the heating body 22 is opened, the temperature and the flow rate are respectively fed back through the first temperature detection module 24, the second temperature detection module 25 and the flow meter 26, and the hot water is obtained through a control algorithm.
The heating flow of the net heat integrated machine has the following schemes:
the valve opening of the back pressure valve is fixed, and the power supply voltage of the booster pump is adjustable;
the valve opening of the back pressure valve is adjustable, and the power supply voltage of the booster pump is fixed;
and in the third scheme, the valve opening of the back pressure valve is adjustable, and the power supply voltage of the booster pump is adjustable.
In the first scheme and the second scheme, only the power supply voltage of the single booster pump and the valve opening of the back pressure valve are used for adjusting the water outlet flow, and in the third scheme, the power supply voltage of the booster pump and the valve opening of the back pressure valve are both adjustable so as to finally adjust the water outlet flow, so that the effect of the third scheme is better than that of the first scheme and the second scheme.
As shown in fig. 2, the heating control method of the net heat integrated machine with the third aspect includes the following steps:
step 1, acquiring the water inlet temperature of a heating body and the power of the heating body, and calculating to obtain the initial heating flow F of the heating body according to the water inlet temperature of the heating body, the preset water outlet temperature of the heating body and the power of the heating body 0 ；
The method comprises the following steps:
through the temperature difference DeltaT=Tset-NTC 1 before and after the heating body, tset is the preset water outlet temperature, NTC1 is the water inlet temperature, the power of the heating body is Pmax, and the initial heating flow is calculated through the specific heat capacity formula of water:
pmax×t=c×m×Δt (formula 1);
c is the specific heat capacity of water, and is generally set to be 4.2X10-3; m is the mass of water, or the flow F times the time t;
step 2, setting the flow F expected to be intercepted by the back pressure valve Pre-preparation According to the trapped flow F Pre-preparation Calculating to obtain the maximum valve opening value of the back pressure valve;
step 3, according to the initial heating flow F of the heating body 0 And the flow rate F expected to be intercepted by the back pressure valve Pre-preparation Calculating to obtain the quantitative flow F of the booster pump 1 According to the relation between the flow rate of the booster pump and the power supply voltage of the booster pump, acquiring the quantitative flow rate F of the booster pump 1 The corresponding booster pump supply voltage;
quantitative flow F of booster pump in step 3 1 The calculation formula of (2) is as follows:
F 1 ＝(F pre-preparation +F 0 )*N；
Wherein N is a preset coefficient, and N is more than 1; n=1.5 in this embodiment;
opening the valve opening of the back pressure valve to the maximum in advance, and taking the booster pump flow under different values by recording the booster pump power supply voltage so as to acquire the relation between the booster pump flow and the booster pump power supply voltage;
step 4, firstly opening the valve opening of the back pressure valve to the maximum value in the step 2, then using the booster pump voltage in the step 3 to supply power to the booster pump, and detecting the data of the flowmeter in real time after the booster pump is powered;
step 5, judging whether the flowmeter has data, if so, starting a heating body, and turning to step 6; if not, continuing to detect the flowmeter, and continuing to perform the step 5;
step 6, adjusting the power of the heating body through a PID algorithm;
the PID algorithm herein, i.e. Proportion Integral Differential algorithm, also known as proportional-integral-derivative control algorithm, belongs to a mature prior art in the control field, and is not described in detail herein; the corresponding heating body power can be obtained according to the outlet water temperature through a PID algorithm;
step 7, detecting the water outlet temperature of the heating body in real time, judging whether the water outlet temperature of the heating body reaches the preset water outlet temperature of the heating body in the step 1 after the water outlet temperature of the heating body is stable, and if so, switching to the step 8; if not, go to step 10;
step 8, the current valve opening of the back pressure valve is increased, and then the power supply voltage of the booster pump is adjusted through a PID algorithm;
in this step, the current valve opening of the back pressure valve is adjusted to be larger according to a certain proportion each time, for example: the scaling-up ratio may be 1%;
step 9, judging whether the current valve opening of the back pressure valve reaches the maximum value, if so, recording the current power of the heating body, the valve opening of the back pressure valve and the corresponding value of the power supply voltage of the booster pump as the reference parameter of the next time of the heat-purifying integrated machine; if not, turning to step 6;
and 10, adjusting the valve opening of the back pressure valve through a PID algorithm, and switching to the step 6.
In this embodiment, the flow calibration of the booster pump at the maximum opening of the back pressure valve, that is, the flow value of the filtered water obtained at different supply voltages, is performed in advance, and the approximate relationship between the supply voltage increase and decrease and the booster pump flow in a certain range may be obtained.
In order to facilitate understanding of the heating control method of the present utility model, in this embodiment, the heating flow of the heating body may be calculated approximately according to the maximum temperature of the effluent; such as: according to the water outlet temperature of 100 ℃, the maximum power of 2200W and the water inlet temperature of 25 ℃, the heating flow of the heating body is calculated by using the formula 1, and the calculation formula is as follows:
2200w.60s=4200.f (heating flow) (100 ℃ -25 ℃); the heating flow F=0.419L/min is calculated, the flow is approximately 400ml/min at the moment, a certain flow (set to 200 ml/min) is required to be intercepted by a back pressure valve, the flow (400+200) of a booster pump is taken as a quantitative filtration output flow as a standard, the power supply voltage of the booster pump is set, the valve opening of the back pressure valve is regulated at the moment, the valve opening of the back pressure valve is made through data of a flowmeter, and the change data of the heating flow under different valve openings of the back pressure valve, namely the relation between the valve opening of the back pressure valve and the heating flow increase and decrease can be obtained. When the outlet water temperature is highest, the flow is minimum, and the accuracy requirement on the flow is highest.
When heating control is executed, firstly, the flow rate of the booster pump is (400+200) 1.5=900 ml/min as a quantitative filtering output flow rate as a standard, and the power supply voltage of the booster pump is set to meet the requirement of initial flow rate during heating, and at the moment, the back pressure valve is opened to the maximum value; after the booster pump is started, the flow output is realized, the valve opening of the back pressure valve is the maximum value, at the moment, the flowmeter can detect a signal to indicate that the flow is started, and at the same time, the flow detection is started; starting the heating body after the flowmeter detects the signal, and heating water after the heating body is started; then adjusting the power of the heating body through the PID, after the temperature is stable, determining whether the flow is required to be reduced or not according to whether the temperature reaches the standard, and under the condition that the temperature does not reach the standard, judging that the power adjusted through the PID is necessarily full power, wherein the condition that the flow is too large and the flow is required to be reduced is indicated; when the temperature reaches the set value, the flow is small enough, the power is completely used up, if the power is not used much (for example, the idle is more than 5 percent, the heating PID is adjusted to be the power), the flow is necessarily small, and the flow needs to be increased.
The valve opening of the back pressure valve is preferentially adjusted when the flow is adjusted, so that the speed is high; and adjusting the valve opening of the back pressure valve according to the relation between the valve opening of the back pressure valve calibrated before and the flow so as to meet the flow. The incremental formula is Δu1 (t) =kp1×e (t) -e (t-1)) +ki1×e (t) +kd1×e (t) -2*e (t-1) +e (t-2)). Wherein U1 (t) is the flow to be regulated, e (t) is the current temperature deviation, e (t-1) is the last temperature deviation, e (t-2) is the last temperature deviation, kp1, ki1 and Kd1 are respectively coefficients of PID, mainly the temperature is related to the flow, and the numerical values of Kp, ki and Kd coefficients can be confirmed according to experience and actual regulation effects. And calculating delta U (t) as a flow variation value, and adjusting the valve opening of the back pressure valve according to the relation between the valve opening and the flow by using the data calibrated by the back pressure valve.
The method meets the power and flow composite requirement, namely, under the maximum power, the temperature is stable, the flow is stable, and the method is also the maximum flow under the composite requirement. At the moment, whether the booster pump has redundant filtering flow is considered, and the optimal state is that the filtering flow of the booster pump is minimum and the valve opening of the back pressure valve is maximum from the aspect of flow; because the output filtering flow in front of the booster pump is larger, the back pressure valve is throttled, so that the flow which is excessive in the booster pump originally flows out of the wastewater.
The power supply voltage increment formula of the booster pump is as follows:
△U2(t)＝Kp2*(e(t)-e(t-1))+Ki2*e(t)+Kd2*(e(t)–2*e(t-1)+e(t-2))；
wherein U2 (t) is the flow to be regulated, e (t) is the current flow deviation, namely the calibration flow of the booster pump under the current power supply voltage and the actual flow of the flowmeter, and the reason for the deviation is the throttling of the back pressure valve; e (t-1) is the last flow deviation, e (t-2) is the last flow deviation, kp2, ki2, kd2 are the coefficients of PID, respectively. After U2 (t) is calculated, the flow rate is adjusted by adjusting the voltage of the booster pump.
Under the condition of ensuring that the outlet water temperature reaches the standard and the full power, the power and the heating flow of the heating body are required to be adjusted, so that the valve opening of the back pressure valve is adjusted first. When the outlet water temperature, power and heating flow of the heating body are met, secondary adjustment is carried out, the filtering flow of the booster pump is adjusted, and the output flow of the back pressure valve has an influence after the booster pump is adjusted, so that the valve opening of the back pressure valve is adjusted again, and finally, the minimum voltage of the booster pump, namely the filtering flow, the maximum back pressure valve opening and the maximum back pressure valve opening are sequentially adjusted, the 2 guarantees the flow optimization, and the heating flow, the full power and the outlet water temperature are optimized, and are the optimal states of the purifying and heating system, and the data are recorded at the moment and serve as default setting parameters under the same condition next time, so that the current state can be quickly reached during the next heating, the iterative optimization can be continued, and the rapid adjustment can be carried out when the parameter inconsistency and the environment change of batches are avoided.

Claims (3)

1. A heating control method of a heat-purifying all-in-one machine, the heat-purifying all-in-one machine comprising:
the water purification module comprises a first pipeline and a filter element assembly arranged on the first pipeline, wherein the filter element assembly comprises an input end and an output end, and the input end of the filter element assembly is provided with a booster pump;
the heating module comprises a second pipeline and a heating body arranged in the second pipeline, the second pipeline is provided with a water inlet and a water outlet, the water inlet is communicated with the output end of the filter element assembly, and the heating body is positioned between the water inlet and the water outlet;
the method is characterized in that: further comprises:
the throttle valve is arranged on the second pipeline and is positioned between the water inlet of the second pipeline and the heating body;
the throttle valve is a back pressure valve;
the heating control method of the heat-purifying integrated machine comprises the following steps:
step 1, acquiring the water inlet temperature of a heating body and the power of the heating body, and calculating to obtain the initial heating flow F of the heating body according to the water inlet temperature of the heating body, the preset water outlet temperature of the heating body and the power of the heating body 0 ；
Step 2, setting the flow F expected to be intercepted by the back pressure valve Pre-preparation According to the trapped flow F Pre-preparation Calculating to obtain the maximum valve opening value of the back pressure valve;
step 3, according to the initial heating flow F of the heating body 0 And the flow rate F expected to be intercepted by the back pressure valve Pre-preparation Calculating to obtain the quantitative flow F of the booster pump 1 According to the relation between the flow rate of the booster pump and the power supply voltage of the booster pump, acquiring the quantitative flow rate F of the booster pump 1 The corresponding booster pump supply voltage;
wherein, the booster pump quantifies the flow F 1 The calculation formula of (2) is as follows:
F 1 =(F pre-preparation +F 0 )*N；
Wherein N is a preset coefficient, and N is more than 1;
opening the valve opening of the back pressure valve to the maximum in advance, and taking the booster pump flow under different values by recording the booster pump power supply voltage so as to acquire the relation between the booster pump flow and the booster pump power supply voltage;
step 4, firstly opening the valve opening of the back pressure valve to the maximum value in the step 2, then using the booster pump voltage in the step 3 to supply power to the booster pump, and detecting the data of the flowmeter in real time after the booster pump is powered;
step 5, judging whether the flowmeter has data, if so, starting a heating body, and turning to step 6; if not, continuing to detect the flowmeter, and continuing to perform the step 5;
step 6, adjusting the power of the heating body through a PID algorithm;
step 7, detecting the water outlet temperature of the heating body in real time, judging whether the water outlet temperature of the heating body reaches the preset water outlet temperature of the heating body in the step 1 after the water outlet temperature of the heating body is stable, and if so, switching to the step 8; if not, go to step 10;
step 8, the current valve opening of the back pressure valve is increased, and then the power supply voltage of the booster pump is adjusted through a PID algorithm;
step 9, judging whether the current valve opening of the back pressure valve reaches the maximum value, if so, recording the current power of the heating body, the valve opening of the back pressure valve and the corresponding value of the power supply voltage of the booster pump as the reference parameter of the next time of the heat-purifying integrated machine; if not, turning to step 6;
and 10, adjusting the valve opening of the back pressure valve through a PID algorithm, and switching to the step 6.
2. The heating control method according to claim 1, characterized in that: the heating body water inlet temperature detection device further comprises a first temperature detection module for detecting the heating body water inlet temperature and a second temperature detection module for detecting the heating body water outlet temperature.
3. The heating control method according to claim 2, characterized in that: the device also comprises a flowmeter for detecting the water inflow of the heating body.
CN202211066430.4A 2022-08-31 2022-08-31 Heat-purifying all-in-one machine and heating control method thereof Active CN115448391B (en)

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CN115448391B true CN115448391B (en) 2023-10-20

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