阅读说明：本技术 衣物护理机智能温控方法及系统 (Intelligent temperature control method and system for clothes care machine ) 是由 王永伟 于 2020-04-01 设计创作，主要内容包括：本发明揭示了一种衣物护理机智能温控方法及系统,包括如下步骤,以衣物材质所能接收的目标温度为基础值,叠加温度补偿值,从而确定PTC发热元件目标温度;所述第一温度补偿值是根据PTC发热元件实际温度与护理腔内温度的温差计算得到;所述第二温度补偿值是根据与所述PTC发热元件相配的风机风速计算得到;以所述PTC发热元件目标温度为给定量,以PTC发热元件实际温度作为反馈量,以PTC发热元件作为执行机构,控制将PTC发热元件的PWM占空比进行分阶段提升温度。本发明技术方案的优点主要体现在：根据衣物材质智能控制PTC发热元件的温度输出,保证节能性和安全性。(The invention discloses an intelligent temperature control method and system for a clothes care machine, which comprises the following steps of determining the target temperature of a PTC heating element by superposing a temperature compensation value on the basis of the target temperature which can be received by clothes materials, calculating the temperature difference between the actual temperature of the PTC heating element and the temperature in a care cavity, calculating the second temperature compensation value according to the wind speed of a fan which is matched with the PTC heating element, taking the target temperature of the PTC heating element as a given quantity, taking the actual temperature of the PTC heating element as a feedback quantity, taking the PTC heating element as an execution mechanism, and controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages. The technical scheme of the invention has the advantages that: the temperature output of the PTC heating element is intelligently controlled according to the material quality of clothes, and the energy saving performance and the safety are ensured.)

1. The intelligent temperature control method of the clothes care machine is characterized by comprising the following steps: comprises the following steps of (a) carrying out,

s1, a PTC heating element target temperature determining step, namely overlapping a temperature compensation value by taking a target temperature which can be received by clothes materials as a basic value to determine the PTC heating element target temperature, wherein the first temperature compensation value is calculated according to the temperature difference between the actual temperature of the PTC heating element and the temperature in the nursing cavity;

and S2, controlling the PTC heating element, namely controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages by taking the target temperature of the PTC heating element as a given value, taking the actual temperature of the PTC heating element as a feedback value and taking the PTC heating element as an actuating mechanism.

2. The intelligent temperature control method of a clothes care machine according to claim 1, characterized in that: in step S1, the method specifically includes the step of automatically distinguishing the material of the clothes,

s11, configuring a group of ultrasonic generators and an ultrasonic receiver, wherein ultrasonic probes of the ultrasonic generators are uniformly distributed in a nursing cavity of the clothes nursing machine from top to bottom;

s12, starting an ultrasonic generator, and analyzing ultrasonic attenuation data received by the ultrasonic receiver;

and S13, determining the clothes material matched with the ultrasonic attenuation data according to the ultrasonic attenuation data.

3. The intelligent temperature control method of a clothes care machine according to claim 2, characterized in that: in step S12, specifically, the method includes amplifying the ultrasonic wave; and comparing the received ultrasonic reflection wave with the amplitude of the ultrasonic wave sent by the ultrasonic generator to obtain the ultrasonic wave attenuation data.

4. A method for intelligent temperature control of a laundry care machine according to claim 3, characterized in that: in step S13, the method specifically includes the steps of searching for an absorption capacity value of the ultrasonic wave absorbed by the clothes matching the current ultrasonic wave attenuation data; and determining the clothes material matched with the ultrasonic wave according to the absorption capacity value of the ultrasonic wave.

5. The intelligent temperature control method of a clothes care machine according to claim 1, characterized in that: the step S2 includes the steps of transmitting the real-time temperature of the PTC heating element to the temperature controller by the temperature detector, extracting a first temperature critical value T1 and a second temperature critical value T2 from the threshold temperature storage module, wherein T1 is greater than T2, comparing the real-time temperature with a temperature value T1 and a temperature value T2, and controlling the PTC heating element to gradually increase in temperature under the power-on condition when the real-time temperature is less than the temperature value T2, so that the real-time temperature reaches the target temperature of the PTC heating element.

6. The intelligent temperature control method of a clothes care machine according to claim 2, characterized in that: in step S2, the step of raising the temperature includes setting the PWM output mode to increase the PWM duty cycle by one percent every 1 second.

7. Clothing nursing machine intelligence temperature control system, its characterized in that: comprises that

The device comprises a PTC heating element target temperature determining unit, a first temperature compensation value and a second temperature compensation value, wherein the PTC heating element target temperature determining unit is used for determining the target temperature of the PTC heating element by superposing the temperature compensation value on the basis of the target temperature which can be received by the material of clothes;

and the PTC heating element control unit is used for controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages by taking the target temperature of the PTC heating element as a given amount, taking the actual temperature of the PTC heating element as a feedback amount and taking the PTC heating element as an actuating mechanism.

Technical Field

The invention belongs to the technical field of clothes nursing machines, and particularly relates to an intelligent temperature control method and system for a clothes nursing machine.

Background

A laundry care machine is a device for treating laundry placed in a laundry space provided in a cabinet by supplying steam or hot air to the laundry, removing odor, wrinkles or moisture from the laundry to satisfy a user wearing the laundry.

Generally, the clothes nursing machine adopts the PTC heating element to control the temperature of the nursing cavity, because the PTC heating element has higher heating efficiency, and the positive temperature coefficient characteristic of the PTC heating element is far superior to the safety performance of the electric heating tube for thermostatic control and electric auxiliary heating. However, the direct connection of the high-power PTC heating element causes a very high inrush current when the PTC heating element is connected and started, which causes a very high impact on the circuit, easily damages the electrical element, and reduces the lifetime of the device. Moreover, due to the particularity of the laundry care machine, the temperature of the care cavity needs to be controlled to adapt to the clothes made of different materials, otherwise, once the temperature and the humidity are too high, the clothes are deformed.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides an intelligent temperature control method and system for a clothes care machine.

The purpose of the invention is realized by the following technical scheme:

an intelligent temperature control method of a clothes nursing machine comprises the following steps,

s1, a PTC heating element target temperature determining step, namely overlapping a temperature compensation value by taking a target temperature which can be received by clothes materials as a basic value to determine the PTC heating element target temperature, wherein the first temperature compensation value is calculated according to the temperature difference between the actual temperature of the PTC heating element and the temperature in the nursing cavity;

and S2, controlling the PTC heating element, namely controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages by taking the target temperature of the PTC heating element as a given value, taking the actual temperature of the PTC heating element as a feedback value and taking the PTC heating element as an actuating mechanism.

Preferably, the step S1 specifically includes the step of automatically distinguishing the material of the clothes,

s11, configuring a group of ultrasonic generators and an ultrasonic receiver, wherein ultrasonic probes of the ultrasonic generators are uniformly distributed in a nursing cavity of the clothes nursing machine from top to bottom;

s12, starting an ultrasonic generator, and analyzing ultrasonic attenuation data received by the ultrasonic receiver;

and S13, determining the clothes material matched with the ultrasonic attenuation data according to the ultrasonic attenuation data.

Preferably, the step S12 specifically includes amplifying the ultrasonic wave; and comparing the received ultrasonic reflection wave with the amplitude of the ultrasonic wave sent by the ultrasonic generator to obtain the ultrasonic wave attenuation data.

Preferably, the step S13 specifically includes the step of searching, according to the current ultrasonic attenuation data, an absorption capacity value of the clothes, which is matched with the current ultrasonic attenuation data, for absorbing the ultrasonic waves; and determining the clothes material matched with the ultrasonic wave according to the absorption capacity value of the ultrasonic wave.

Preferably, the step S2 specifically includes the steps of transmitting the real-time temperature of the PTC heating element to the temperature controller by the temperature detector, extracting a first temperature critical value T1 and a second temperature critical value T2 from the threshold temperature storage module, wherein T1 is greater than T2, comparing the real-time temperature with a temperature value T1 and a temperature value T2, and controlling the PTC heating element to gradually increase in temperature to reach the target temperature of the PTC heating element when the real-time temperature is less than the temperature value T2.

Preferably, in step S2, the step of raising the temperature includes setting the PWM output mode to increase the PWM duty cycle by one percent every 1 second.

An intelligent temperature control system of a clothes nursing machine comprises:

the device comprises a PTC heating element target temperature determining unit, a first temperature compensation value and a second temperature compensation value, wherein the PTC heating element target temperature determining unit is used for determining the target temperature of the PTC heating element by superposing the temperature compensation value on the basis of the target temperature which can be received by the material of clothes;

and the PTC heating element control unit is used for controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages by taking the target temperature of the PTC heating element as a given amount, taking the actual temperature of the PTC heating element as a feedback amount and taking the PTC heating element as an actuating mechanism.

The technical scheme of the invention has the advantages that: the temperature output of the PTC heating element is intelligently controlled according to the material quality of clothes, and the energy saving performance and the safety are ensured.

Drawings

FIG. 1: the invention relates to a flow schematic block diagram of an intelligent temperature control method of a clothes care machine.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

As shown in FIG. 1, the invention discloses an intelligent temperature control method for a clothes care machine, comprising the following steps,

s1, a PTC heating element target temperature determining step, namely, overlapping temperature compensation values by taking the target temperature which can be received by the material of clothes as a basic value, thereby determining the target temperature of the PTC heating element, wherein the temperature can be lost, and the temperature in the nursing cavity and the actual temperature of the PTC heating element can be attenuated, so the first temperature compensation value is calculated according to the temperature difference between the actual temperature of the PTC heating element and the temperature in the nursing cavity;

and S2, a PTC heating element control step, namely, taking the target temperature of the PTC heating element as a given quantity, taking the actual temperature of the PTC heating element as a feedback quantity, taking the PTC heating element as an actuating mechanism, forming a closed loop control system, and controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages.

In step S1, the method specifically includes the step of automatically distinguishing the material of the clothes,

s11, configuring a group of ultrasonic generators and an ultrasonic receiver, wherein ultrasonic probes of the ultrasonic generators are uniformly distributed in a nursing cavity of the clothes nursing machine from top to bottom;

s12, starting an ultrasonic generator, and analyzing ultrasonic attenuation data received by the ultrasonic receiver;

and S13, determining the clothes material matched with the ultrasonic attenuation data according to the ultrasonic attenuation data.

In step S12, specifically, the method includes amplifying the ultrasonic wave; and comparing the received ultrasonic reflection wave with the amplitude of the ultrasonic wave sent by the ultrasonic generator to obtain the ultrasonic wave attenuation data.

In step S13, the method specifically includes the steps of searching for an absorption capacity value of the ultrasonic wave absorbed by the clothes matching the current ultrasonic wave attenuation data; and determining the clothes material matched with the ultrasonic wave according to the absorption capacity value of the ultrasonic wave.

The PTC heating element has the characteristic of constant temperature heating, the heating principle is that after the constant temperature heating element is electrified, the resistance value is heated by self-heating to enter a jump zone, the surface temperature of the PTC heating element keeps a constant value, the temperature is only related to the Curie temperature and the applied voltage of the PTC heating element and is basically unrelated to the environmental temperature, the PTC heating element has the advantages that the traditional heating element can generate heat at constant temperature, no open fire exists, the heat conversion rate is high, the influence of the power supply voltage is small, the natural service life is long and the like, but after the traditional PTC heating element generates heat for a period of time, the surface temperature of the PTC heating element can be reduced, the temperature of the PTC heating element can not keep constant, and the using effect of the PTC heating element is influenced. In view of this, the step S2 specifically includes the steps of the temperature detector transmitting the real-time temperature of the PTC heating element to the temperature controller, extracting a first temperature threshold T1 and a second temperature threshold T2 from the threshold temperature storage module, wherein T1 is greater than T2, comparing the real-time temperature with a temperature value T1 and a temperature value T2, and controlling the PTC heating element to gradually increase in temperature to reach the target temperature of the PTC heating element when the real-time temperature is less than the temperature value T2.

When the temperature of the PTC heating element is within the range of the first temperature critical value T1 and the second temperature critical value T2, the PTC heating element stops heating, when the temperature of the PTC heating element is less than T1, the PTC heating element is controlled to continue heating, so that the temperature of the PTC heating element returns to the range of T1 and T2, and the whole process can be automatically controlled, so that the temperature of the PTC heating element is kept constant, and the using effect of the PTC heating element is not influenced.

The step-by-step temperature increase of the invention specifically comprises setting the output mode of the PWM to increase the PWM duty cycle by one percent every 1 second. Because the PTC heating element is powered by high-voltage electricity, the PWM duty ratio can be increased rapidly and surge current and abrupt current are caused to the high-voltage bus, and the high-voltage bus is effectively protected by setting PWM output in stages.

The invention also discloses an intelligent temperature control system of the clothes nursing machine, which comprises:

the device comprises a PTC heating element target temperature determining unit, a first temperature compensation value and a second temperature compensation value, wherein the PTC heating element target temperature determining unit is used for determining the target temperature of the PTC heating element by superposing the temperature compensation value on the basis of the target temperature which can be received by the material of clothes;

and the PTC heating element control unit is used for controlling the PWM duty ratio of the PTC heating element to increase the temperature in stages by taking the target temperature of the PTC heating element as a given amount, taking the actual temperature of the PTC heating element as a feedback amount and taking the PTC heating element as an actuating mechanism.

The invention has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the invention.