阅读说明：本技术 智能即热式直饮机自适应加热方法 (Self-adaptive heating method of intelligent instant heating type direct drinking machine ) 是由 向阳 于 2019-10-25 设计创作，主要内容包括：本发明提出一种智能即热式直饮机自适应加热方法,属于即热式饮水机领域。为解决因来自输入加热参数的误差,导致出水温度不准确的问题,本发明包括：首先,预加热处理；其次,计算加热参数；然后,确定有效加热参数,判断系统内是否已经存在有效的加热参数,并且判断是否匹配；然后,控制加热出水,监控出水温度；最后,当出水温度在目标温度的容差范围内,记录并建立当前实际加热参数表。本发明可有效克服加热参数的误差,减少加热过程中的反复震荡,快速、准确控制出水温度。(The invention provides a self-adaptive heating method of an intelligent instant heating type direct drinking machine, and belongs to the field of instant heating type drinking machines. In order to solve the problem of inaccurate outlet water temperature caused by errors of input heating parameters, the invention comprises the following steps: firstly, preheating treatment; secondly, calculating heating parameters; then, determining effective heating parameters, judging whether the effective heating parameters exist in the system and judging whether the effective heating parameters are matched; then, controlling the heating water outlet and monitoring the water outlet temperature; and finally, recording and establishing a current actual heating parameter table when the outlet water temperature is within the tolerance range of the target temperature. The invention can effectively overcome the error of heating parameters, reduce the repeated oscillation in the heating process and quickly and accurately control the outlet water temperature.)

1. The self-adaptive heating method of the intelligent instant heating type direct drinking machine is characterized by comprising the following steps:

step 1, preheating;

step 2, calculating heating parameters;

step 3, determining effective heating parameters, judging whether the effective heating parameters exist in the system and judging whether the effective heating parameters are matched;

step 4, controlling the heating effluent and monitoring the effluent temperature;

and 5, recording and establishing a current actual heating parameter table when the outlet water temperature is within the tolerance range of the target temperature.

2. The self-adaptive heating method of the intelligent instant heating type drinking fountain according to claim 1, wherein in step 1, the preheating treatment is: if the machine is electrified to take hot water for the first time, the hot water is discharged after 3 seconds of normal-temperature water is discharged through preheating treatment.

3. The self-adaptive heating method of the intelligent instant heating type direct drinking machine according to claim 1, wherein in the step 2, in the process of calculating the heating parameters, an actual heating percentage coefficient n is determined according to a formula C V (t _ out-t _ in) ═ U/R n/100K, that is, an outlet water speed is obtained, and finally, control parameters of the outlet water valve are converted, wherein t _ out is an outlet water temperature, t _ in is an inlet water temperature, C is a specific volume constant 4.2, V is a heating outlet water speed, U is a voltage, R is a resistance, K is an effective electric energy to heat energy conversion coefficient, and K < 1.

4. The adaptive heating method of an intelligent instant heating type drinking fountain according to claim 3, wherein V is M/T, where T is heating time and M is water quality.

5. The self-adaptive heating method of the intelligent instant heating type drinking fountain according to claim 1, wherein in the step 3, when the effective heating coefficient is determined, the method specifically comprises the following steps:

a. firstly, judging whether effective heating parameters exist in the system or not, if so, further judging whether the current parameters are matched with the effective heating parameters or not, if so, directly calling the effective heating parameters of the last time, and if not, entering the next step;

b. calculating heating parameters according to the acquired data;

c. the heating pulse of the heating circuit and the parameters of the water outlet valve are controlled to realize instant heating of the water outlet.

6. The self-adaptive heating method of the intelligent instant heating type instant drinking machine according to claim 1, characterized in that in step 4, corresponding software feedback control needs to be added in the process of heating the outlet water during the process of monitoring the outlet water temperature, the software compares the collected actual outlet water temperature with a reference value, and then the difference value of the comparison is used for calculating new heating parameters, and the new heating parameters enable the outlet water temperature data of the system to reach or keep within the error range of the reference value.

7. The self-adaptive heating method of the intelligent instant heating type instant drinking machine according to claim 1, characterized in that in step 5, when the outlet water temperature is within the tolerance range of the target temperature, the current actual heating parameters (V1, T1, H2, P2) are recorded, the relationship f (V1, T1, α) ═ H2, P2 is established, and a corresponding parameter table is established, wherein V1 represents the current ac voltage, T1 represents the theoretical temperature difference, i.e., the target outlet water temperature-inlet water temperature, α represents the tolerance range, H2 represents the actual number of heating pulses, and P2 represents the actual outlet valve parameters.

Technical Field

The invention relates to the field of instant heating type drinking machines, in particular to an intelligent instant heating type drinking machine self-adaptive heating method.

Background

Instant heating type directly drinks machine is one kind and can heats flowing water through electron heating components and parts fast, turns into heat energy through the electric energy, and heat energy is the heat transfer aquatic again, utilizes powerful heat can heat water rapidly. The instant water dispenser can be drunk immediately after being opened, compared with the traditional water dispenser, the simplicity is greatly improved, and the energy and the electricity are saved because the required heating time is short. The quick-heating type water dispenser controller is popular among people and mainly comprises a water temperature detection circuit, a heating element, a water temperature control circuit, a water outlet valve and the like. During the period of water outlet, water flows pass through the heating film, the heating film heats the water flows, the water temperature of the water outlet is monitored through the temperature sensor, the water temperature is controlled through simple regulation and feedback, the stable control effect of the control system on the water temperature is improved to some extent compared with an open-loop control system, and the water temperature still has large errors under the environment with large temperature difference.

And (3) analyzing error causes:

the heating theory is that electric energy is converted into heat energy:

the formula of heat Q ═ Cm Δ T ═ C × M (T _ out-T _ in), C is the specific volume constant 4.2, M is the mass of water, T _ out is the leaving water temperature, T _ in is the entering water temperature, the electric energy W ═ U/R ═ T, U is the voltage, R is the resistance, T is the heating time, C × M (T _ out-T _ in) ═ U/R ═ T, C ═ V ═ T _ out-T _ in ═ U/R, V ═ M/T is the heating leaving water rate. In consideration of the conversion loss, a heating coefficient K is required to be increased, and in order to control the heating power more accurately, pulse waveforms with fixed output frequency are adopted, and the heating power is controlled by controlling the number of the pulse waveforms per unit time. The final calculation formula is C V (t _ out-t _ in) ═ U/R n/100K, K is the coefficient of effective electric energy to heat energy K <1, n is equivalent to the number of heating pulses per unit time, or is considered as the actual heating percentage coefficient.

For heating, the temperature difference can be determined, the current alternating voltage can also be measured, and the conversion rate of effective electric energy to heat energy can also be determined. Therefore, the system controls the output electric power by controlling the heating pulse, and controls the water outlet speed by adjusting the motor of the water outlet valve, thereby ensuring that the water outlet temperature meets the requirement.

The heating is thus related to the following parameters:

1. v is the heating water outlet speed, and the water outlet speed is controlled by adjusting the parameters of a water outlet valve motor. For cost, the scheme does not use a special flowmeter to test the water speed in real time. Causing some error in the different machines and more thermal error if the heated temperature is higher.

When the alternating voltage is normal or higher, the output electric energy is higher, and more heat energy can be converted. When the alternating voltage is lower, the converted heat energy is less. Under the condition of stable voltage, the higher the water outlet temperature is, the lower the water outlet speed is required to be. The lower the water outlet temperature is, the water outlet speed can be properly increased.

2. U is alternating voltage, in the practical scheme, an alternating current mutual inductance circuit is adopted to provide a sine wave for the system, software samples to the maximum value in a sine wave period, and real-time voltage is calculated.

Also, due to differences in devices, there are some differences in real-time voltages monitored by different machines.

Due to the error, errors of the calculated heating control parameters and the parameters of the water outlet valve are inevitably caused, and the water outlet temperature cannot reach the target value. Although the post-correction can be performed, when the error is large, the adjustment time is also long, and the outlet water temperature may fluctuate above and below the target temperature. The water outlet time of the scheme is short, about 10 seconds to 30 seconds, and the water outlet temperature is required to be rapidly stabilized to a target value in the post-heating water outlet period, so that an intelligent instant heating type direct drinking machine self-adaptive method is required to overcome the errors.

Disclosure of Invention

The invention aims to provide an intelligent instant heating type direct drinking machine self-adaptive heating method, which solves the problem of inaccurate outlet water temperature caused by errors of input heating parameters.

The invention solves the technical problem, and adopts the technical scheme that: the self-adaptive heating method of the intelligent instant heating type direct drinking machine comprises the following steps:

step 1, preheating;

step 2, calculating heating parameters;

step 3, determining effective heating parameters, judging whether the effective heating parameters exist in the system and judging whether the effective heating parameters are matched;

step 4, controlling the heating effluent and monitoring the effluent temperature;

and 5, recording and establishing a current actual heating parameter table when the outlet water temperature is within the tolerance range of the target temperature.

Specifically, in step 1, the preheating treatment refers to: if the machine is electrified to take hot water for the first time, the hot water is discharged after 3 seconds of normal-temperature water is discharged through preheating treatment.

Further, in step 2, in the process of calculating the heating parameters, according to a formula C V (t _ out-t _ in) ═ U/R n/100K, an actual heating percentage coefficient n is determined, that is, a water outlet speed is obtained, and finally, control parameters of the water outlet valve are converted, wherein t _ out is a water outlet temperature, t _ in is a water inlet temperature, C is a specific volume constant 4.2, V is a heating water outlet speed, U is a voltage, R is a resistance, K is an effective electric energy to heat energy coefficient, and K is less than 1.

Specifically, V ═ M/T, where T is the heating time and M is the mass of water.

Further, in step 3, when determining the effective heating coefficient, the method specifically includes the following steps:

a. firstly, judging whether effective heating parameters exist in the system or not, if so, further judging whether the current parameters are matched with the effective heating parameters or not, if so, directly calling the effective heating parameters of the last time, and if not, entering the next step;

b. calculating heating parameters according to the acquired data;

c. the heating pulse of the heating circuit and the parameters of the water outlet valve are controlled to realize instant heating of the water outlet.

Specifically, in the step 4, in the process of monitoring the effluent temperature, corresponding software feedback control needs to be added in the process of heating the effluent, the software compares the collected actual effluent temperature with a reference value, then the compared difference value is used for calculating a new heating parameter, and the new heating parameter enables the effluent temperature data of the system to reach or keep within the error range of the reference value.

Further, in step 5, when the outlet water temperature is within the tolerance range of the target temperature, the current actual heating parameters (V1, T1, H2, P2) are recorded, a relationship f (V1, T1, α) ═ H2, P2 is established, and a corresponding parameter table is established, wherein V1 represents the current alternating voltage, T1 represents the theoretical temperature difference, i.e., the target outlet water temperature — inlet water temperature, α represents the tolerance range, H2 represents the actual number of heating pulses, and P2 represents the actual outlet water valve parameters.

The invention has the advantages of effectively overcoming the error of the heating parameter, reducing the repeated oscillation in the heating process and quickly and accurately controlling the outlet water temperature.

Drawings

FIG. 1 is a flow chart of the self-adaptive heating method of the intelligent instant heating type drinking fountain of the present invention.

Detailed Description

The technical scheme of the invention is described in detail in the following with reference to the accompanying drawings.

The invention relates to a self-adaptive heating method of an intelligent instant heating type direct drinking machine, and a flow chart of the self-adaptive heating method is shown in figure 1, wherein the method comprises the following steps:

step 1, preheating treatment.

When the machine takes hot water, the machine has a preheating stage to ensure that the temperature of the hot water meets the requirement. If the machine is powered on to take hot water for the first time, the hot water is discharged after the water is discharged for 3 seconds at normal temperature.

And 2, calculating heating parameters.

In the process of calculating the heating parameters, determining an actual heating percentage coefficient n according to a formula C V (t _ out-t _ in) ═ U/R n/100K, namely obtaining the water outlet speed, and finally converting control parameters of the water outlet valve, wherein t _ out is the water outlet temperature, t _ in is the water inlet temperature, C is a specific volume constant 4.2, V is the heating water outlet speed, U is voltage, R is resistance, K is an effective electric energy to heat energy coefficient, and K is less than 1. And V is M/T, wherein T is heating time and M is water quality.

And 3, determining effective heating parameters, judging whether the effective heating parameters exist in the system or not, and judging whether the effective heating parameters are matched or not.

The method specifically comprises the following steps when the effective heating coefficient is determined:

a. firstly, judging whether effective heating parameters exist in the system or not, if so, further judging whether the current parameters are matched with the effective heating parameters or not, if so, directly calling the effective heating parameters of the last time, and if not, entering the next step;

b. calculating heating parameters according to the acquired data;

c. the heating pulse of the heating circuit and the parameters of the water outlet valve are controlled to realize instant heating of the water outlet.

And 4, controlling the heating water outlet and monitoring the water outlet temperature.

In the water heating process, various errors exist, in order to reduce and eliminate the errors, corresponding software feedback control needs to be added in the water heating process, the software compares the collected actual outlet water temperature with a reference value, and then the compared difference value is used for calculating a new heating parameter, and the purpose of the new heating parameter is to enable the outlet water temperature data of the system to reach or be kept within the error range of the reference value.

And 5, recording and establishing a current actual heating parameter table when the outlet water temperature is within the tolerance range of the target temperature.

When the outlet water temperature is within the tolerance range of the target temperature, the current actual heating parameters (V1, T1, H2 and P2) are recorded, a relation f (V1, T1 and alpha) is established as (H2 and P2), and a corresponding parameter table is established, wherein V1 represents the current alternating voltage, T1 represents the theoretical temperature difference, namely the target outlet water temperature-inlet water temperature, alpha represents the tolerance range, H2 represents the actual number of heating pulses, and P2 represents the actual outlet water valve parameters.

In the invention, because of errors, an accurate mathematical model cannot be obtained, and although a satisfactory effect can be obtained by adopting an approximation method for calculation, the compatibility problem still exists. Sometimes, when the error is large, the adjustment time is also long, so the heating method needs to be optimized. Therefore, the invention not only can overcome the error of the heating parameter, but also can reduce the repeated oscillation in the heating process.

In the present invention, errors in the actual heating parameters may occur due to differences in the hardware states of the different machines. In practical use, for a certain machine with an error, the error is relatively stable and fluctuates within a certain range. The corresponding effective parameter mapping table can be dynamically established by adopting self-adaption in a plurality of heating processes. In the later heating process, if the corresponding parameters exist, the effective parameters are directly called and confirmed, so that the influence caused by device errors is reduced and eliminated, and the water outlet temperature is quickly and accurately controlled.