阅读说明：本技术 一种恒温间室的模糊控制方法 (Fuzzy control method for constant-temperature chamber ) 是由 刘宏宇 程琳 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种恒温间室的模糊控制方法,涉及冰箱技术领域。本发明包括步骤一：记录冷藏门打开时恒温间室温度T0；步骤二：冷藏门关闭时,对恒温间室进行制冷；当室温度小于等于T0或制冷时间达到time1时,停止制冷,并记录温度为T1；步骤三：停止制冷time2后,记录温度T2,并计算T2-T1差值；步骤四：设定温度参数Ta和Tb,且Ta＜Tb；开停机点温度值△T3和△T4；制冷运行时间time3和time4；并比较T2-T1差值与Ta、Tb的大小；步骤五：步骤四运行结束后,恒温间室恢复,并以原开停机点温度运行。本发明通过检测恒温间室内温度的变化量,快速判断放入的物品温度,提高了恒温间室温度控制的响应速度,有效的缩短了放入的物品达到目标恒温温度的时间。(The invention discloses a fuzzy control method for a constant-temperature chamber, and relates to the technical field of refrigerators. The invention comprises the following steps: recording the constant temperature compartment temperature T0 when the refrigeration door is opened; step two: when the refrigerating door is closed, refrigerating the constant-temperature chamber; when the room temperature is less than or equal to T0 or the refrigerating time reaches time1, stopping refrigerating and recording the temperature as T1; step three: after the refrigeration time2 is stopped, recording the temperature T2 and calculating the difference value between T2 and T1; step four: setting temperature parameters Ta and Tb, wherein Ta is less than Tb; start-stop point temperature values Δ T3 and Δ T4; refrigeration run times time3 and time 4; and comparing the difference between T2 and T1 with the magnitude of Ta and Tb; step five: and after the operation of the step four is finished, the constant-temperature chamber is recovered and is operated at the temperature of the original starting and stopping point. According to the invention, the temperature of the put article is rapidly judged by detecting the variable quantity of the temperature in the thermostatic chamber, so that the response speed of temperature control of the thermostatic chamber is improved, and the time for the put article to reach the target thermostatic temperature is effectively shortened.)

1. A fuzzy control method for a constant-temperature chamber is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: when the system recognizes that the refrigeration door is opened, recording the temperature T0 of the constant-temperature chamber when the refrigeration door is opened, and closing a damper of the constant-temperature chamber; if the air door of the constant-temperature chamber is in a closed state, the closed state is maintained;

step two: when the system recognizes that the refrigerating door is closed, the freezing fan and the air door of the constant-temperature chamber are opened to refrigerate the constant-temperature chamber;

when the temperature of the constant-temperature chamber is less than or equal to T0 or the refrigerating time reaches time1, closing the air door of the constant-temperature chamber to stop refrigerating the constant-temperature chamber, and recording the temperature of the constant-temperature chamber at the moment as T1;

step three: recording the temperature T2 of the constant-temperature chamber at the moment after the refrigeration time2 of the constant-temperature chamber is stopped, and recording and calculating the temperature variation between T2 and T1, namely T2-T1;

step four: setting temperature parameters Ta and Tb, wherein Ta is less than Tb; setting startup and shutdown point temperature deviation values delta T3 and delta T4; setting the refrigerating running time3 and time 4;

if T2-T1 is less than Ta, adjusting the temperature of the start-stop point to delta T3, and refrigerating for 3 time;

if Ta is less than or equal to T2-T1 is less than or equal to Tb, keeping the original startup and shutdown point temperature operation;

if Tb is less than T2-T1, adjusting the temperature of the start-stop point to be delta T4, and refrigerating for 4 time;

step five: and after the operation of the step four is finished, the constant-temperature chamber is recovered and is operated at the temperature of the original starting and stopping point.

2. The fuzzy control method of the constant-temperature chamber as claimed in claim 1, wherein the time1 is 1-5 min.

3. The fuzzy control method for the thermostatic chamber according to claim 1 or 2, wherein if the system is in a defrosting state before the second step is performed, the fuzzy control method waits for the defrosting to be finished and then is performed.

4. The fuzzy control method of the constant-temperature chamber as claimed in claim 1, wherein the time2 is 1-10 min.

5. The fuzzy control method for the thermostatic chamber according to claim 1, wherein if the system recognizes that the refrigerating door is opened during the execution of the fourth step, the fuzzy control method returns to and executes the first step again.

6. The fuzzy control method of a constant-temperature chamber according to claim 1 or 5, wherein Ta takes a value of 0-3 ℃ and Tb takes a value of 1-10 ℃.

7. The fuzzy control method for the thermostatic chamber according to claim 1 or 5, wherein the values of Δ T3 and Δ T4 are both 2-5 ℃.

8. The fuzzy control method of a constant temperature chamber as claimed in claim 1 or 5, wherein the time3 and the time4 are 60-240 min.

Technical Field

The invention belongs to the technical field of refrigerators, and particularly relates to a fuzzy control method for a constant-temperature chamber.

Background

With the development of the times, the storage function of the refrigerator is increasingly improved, and the smaller the fluctuation of the temperature of the bright room is, the more beneficial the storage of the food is. More and more new refrigerators come to carry constant temperature compartments.

In a single-system refrigerator, the temperature range of the constant-temperature chamber exceeds the temperature control range of the refrigerating chamber, so that the temperature of most constant-temperature chambers is controlled by using the cold energy of a freezing evaporator, and particularly, the refrigeration of the constant-temperature chamber is realized by using the freezing evaporator, a freezing fan and a constant-temperature chamber air door. Because the cold volume demand of the constant temperature chamber is smaller, when the constant temperature chamber is refrigerated, the compressor is not required to be started, the freezing fan and the air door of the constant temperature chamber are opened, and the refrigeration in a short time can be realized by utilizing the residual cold volume of the freezing evaporator.

However, since the temperature adjustment of the constant temperature chamber is realized by the temperature sensor, the constant temperature chamber does not have a quick response function after hot articles or cold articles are put in, in short, the constant temperature chamber can be quickly frozen after hot articles are put in, the constant temperature chamber can automatically adjust the starting and stopping points after cold articles are put in, and articles can quickly enter a constant temperature range through the intelligent temperature adjustment.

However, the temperature of the existing constant-temperature chamber is controlled by a constant-temperature chamber sensor, and the temperature of an article placed in the constant-temperature chamber after a user opens the door cannot be sensed immediately, so that the temperature of the chamber cannot be adjusted immediately, and the article can rapidly enter a constant-temperature target temperature.

Meanwhile, after the door of the existing constant-temperature chamber is opened, the refrigeration is usually started due to the temperature rise of the chamber because of the hot air, and if the articles put into the chamber by the user are cold articles, a more optimal temperature control method is to adjust the temperature of the constant-temperature chamber upwards so that the cold articles are quickly heated to the constant-temperature target temperature. For example, if a user places frozen meat in a thermostatic chamber, the rule of up-regulating the temperature of the thermostatic chamber may shorten the time for the frozen meat to reach a constant target temperature, compared to the original refrigeration control rule.

Therefore, there are many disadvantages in controlling the temperature of the thermostatic chamber by means of the thermostatic chamber sensor, and the response of the temperature adjustment is not flexible and rapid.

Disclosure of Invention

The invention aims to provide a fuzzy control method of a constant-temperature chamber, which can quickly judge the temperature type of an article placed in the chamber by detecting the variation of the temperature in the chamber, thereby improving the response speed of temperature control and adjustment of the chamber; the problem of current constant temperature room temperature regulation response speed slow, can not reach constant temperature fast is solved.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a fuzzy control method of a constant-temperature chamber, which comprises the following steps:

the method comprises the following steps: when the system recognizes that the refrigeration door is opened, recording the temperature T0 of the constant-temperature chamber when the refrigeration door is opened, and closing a damper of the constant-temperature chamber; if the air door of the constant-temperature chamber is in a closed state, the closed state is maintained;

step two: when the system recognizes that the refrigerating door is closed, the freezing fan and the air door of the constant-temperature chamber are opened to refrigerate the constant-temperature chamber;

when the temperature of the constant-temperature chamber is less than or equal to T0 or the refrigerating time reaches time1, closing the air door of the constant-temperature chamber to stop refrigerating the constant-temperature chamber, and recording the temperature of the constant-temperature chamber at the moment as T1;

step three: recording the temperature T2 of the constant-temperature chamber at the moment after the refrigeration time2 of the constant-temperature chamber is stopped, and recording and calculating the temperature variation between T2 and T1, namely T2-T1;

step four: setting temperature parameters Ta and Tb, wherein Ta is less than Tb; setting startup and shutdown point temperature deviation values delta T3 and delta T4; setting the refrigerating running time3 and time 4;

if T2-T1 is less than Ta, adjusting the temperature of the start-stop point to delta T3, and refrigerating for 3 time;

if Ta is less than or equal to T2-T1 is less than or equal to Tb, keeping the original startup and shutdown point temperature operation;

if Tb is less than T2-T1, adjusting the temperature of the start-stop point to be delta T4, and refrigerating for 4 time;

step five: and after the operation of the step four is finished, the constant-temperature chamber is recovered and is operated at the temperature of the original starting and stopping point.

Further, the value of the time1 is 1-5 min.

Further, if the system is in the evaporator defrosting state before the second step is executed, the defrosting is waited to be finished and then executed.

Further, the value of the time2 is 1-10 min.

Further, if the system recognizes that the refrigeration door is opened in the execution process of the step four, the step one is returned and executed again.

Further, the Ta value is 0-3 ℃, and the Tb value is 1-10 ℃.

Furthermore, the values of the delta T3 and the delta T4 are both 2-5 ℃.

Further, the values of the time3 and the time4 are 60-240 min.

The invention has the following beneficial effects:

according to the invention, the temperature change amount of the opened and closed door of the constant-temperature chamber is detected and calculated, the temperature type of the placed article is rapidly judged, the rapid adjustment of the temperature control of the constant-temperature chamber is realized, the response speed and the accuracy of the temperature adjustment of the constant-temperature chamber are improved, and the time for the placed article to reach the target constant-temperature is effectively shortened.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flow chart of a fuzzy control method for a constant temperature chamber according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.