WO2016206217A1

WO2016206217A1 - Method for sensing internal temperature of refrigerator and refrigerator compartment

Info

Publication number: WO2016206217A1
Application number: PCT/CN2015/090982
Authority: WO
Inventors: 李春阳; 周明顺; 王铭
Original assignee: 青岛海尔股份有限公司
Priority date: 2015-06-26
Filing date: 2015-09-28
Publication date: 2016-12-29
Also published as: CN105115239A; CN105115239B

Abstract

Provided is a method for sensing the internal temperature of a refrigerator and a refrigerator compartment. The sensing method comprises: obtaining a plurality of temperature values measured by an infrared sensor assembly (130), the infrared sensor assembly (130) comprising a plurality of infrared sensing devices used for measuring the temperature of items stored in a preset storage space (140) of a refrigerator compartment; calculating the difference between the largest and smallest values of the plurality of temperature values; determining according to the magnitude of the difference the maximum value weighting coefficient and minimum value weighting coefficient; taking the maximum value weighting coefficient and minimum value weighting coefficient to be the weighting coefficients of the maximum temperature value and the minimum temperature value, and weighting and calculating the maximum temperature value and the minimum temperature value; taking the weighted and calculated result to be the sensed temperature value of the storage space (140). By means of comprehensively calculating temperature data, a measured value is obtained which reflects the actual temperature of the storage space (140), thus the accuracy of measurement of the refrigerator compartment is improved.

Description

Method for sensing indoor temperature between refrigerator and refrigerator

Technical field

The invention relates to a refrigeration device, and in particular to a method for sensing the temperature of a room inside a refrigerator and a refrigerator.

Background technique

Existing refrigerators typically sense the temperature around their arrangement using a temperature sensor disposed inside the compartment, which is used as a basis for refrigeration control.

However, when the refrigerator control is performed using this control method, the refrigerator starts cooling when the temperature measured by the temperature sensor is higher than a preset value. In the case where the compartment is divided into a plurality of relatively independent storage spaces by the shelf partition, the temperature in the storage space just placed in the article may be higher than other storage spaces, and the existing refrigerator temperature control method is required. The entire room is cooled as a whole, resulting in wasted electric energy, especially in the case of a large volume of the compartment.

In addition, for a refrigerator compartment with a large volume, the temperature measured by the temperature sensor may not be uniform, and the temperature measured by the temperature sensor cannot reflect the actual temperature inside the compartment. With this temperature as the basis of the refrigeration control, some temperature unevenness may occur. Resulting in a decrease in storage effect.

Summary of the invention

A further object of the present invention is to improve the measurement accuracy of the internal temperature of the refrigerator, and to provide a method for sensing the temperature of the interior of the refrigerator and the refrigerator.

Another further object of the present invention is to improve the storage effect of the refrigerator on articles.

According to an aspect of the invention, a method of sensing a temperature inside a refrigerator compartment is provided. The sensing method includes: obtaining a plurality of temperature values measured by the infrared sensing component, and the infrared sensing component includes a plurality of infrared sensing devices for measuring a temperature of the stored items in the indoor preset storage space of the refrigerator; Calculating a difference between a maximum value and a minimum value among the plurality of temperature values; determining a maximum weight coefficient and a minimum weight coefficient according to the magnitude of the difference; using the maximum weight coefficient and the minimum weight coefficient as the temperature maximum and the temperature minimum The weight coefficient, the weighted sum calculation of the temperature maximum and the temperature minimum; and the result of the weighted sum calculation as the sensing temperature value of the storage space.

Optionally, the step of determining the maximum weight coefficient and the minimum weight coefficient according to the magnitude of the difference includes: querying, from the preset difference coefficient correspondence table, a maximum weight coefficient corresponding to the magnitude of the difference And the minimum weight coefficient, the difference coefficient corresponds to the maximum weight coefficient and the minimum weight coefficient corresponding to different numerical ranges in which the difference is set in the table.

Optionally, in the difference coefficient correspondence table, when the difference is smaller than the first threshold, the maximum weight coefficient and the minimum weight coefficient are both 0.5; when the difference is greater than or equal to the first threshold and less than the second threshold, the maximum The value weight coefficient and the minimum weight coefficient are preset values, and the sum of the two is 1; when the difference is greater than or equal to the second threshold, the maximum weight coefficient is 1 and the minimum weight coefficient is 0, wherein the first threshold Less than the second threshold.

Optionally, the step of acquiring the plurality of temperature values measured by the infrared sensing component comprises: respectively receiving and recording a continuous predetermined number of timing sample values sensed by each infrared sensing device; and calculating corresponding correspondences according to the timing sampling values The temperature value measured by the infrared sensing device.

Optionally, the step of calculating the temperature value measured by the corresponding infrared sensing device according to the timed sampling value comprises: screening the maximum sampled value and the minimum sampled value in the timed sampling value; calculating the screening of the maximum sampled value and the minimum sampled value The average value of the samples is timed and the average value is taken as the temperature value measured by the corresponding infrared sensing device.

Optionally, after the step of receiving the timing sample value, the method further includes: confirming that the timing sample value belongs to a preset normal value interval, and recording the sample value that belongs to the normal value interval, and setting the sample value that exceeds the normal value interval to be invalid. Data; and if a predetermined predetermined number of sample values are invalid data, a temperature measurement abnormality prompt signal is generated.

Optionally, the refrigerator compartment is divided into a plurality of storage spaces, and each storage space is respectively provided with an infrared sensing component for measuring the temperature of the stored articles therein, and the method further comprises: separately calculating The sensed temperature values of the plurality of storage spaces are used as a basis for temperature control of the storage space.

Optionally, the refrigerator is provided with a split air supply device, and the split air supply device is configured to distribute the cooling air flow from the cold source to the plurality of storage spaces, and respectively calculate the sensing temperatures of the plurality of storage spaces. The step of value further comprises: respectively comparing the sensed temperature value of each storage space with a preset regional cooling open temperature threshold of each storage space; and storing the sensed temperature value greater than the regional cooling open temperature threshold The cooling state identifier corresponding to the object space is set to be activated; and the driving of the bypass air blowing device is operated to provide a state of cooling airflow to the storage space indicated by the cooling state as being activated.

According to another aspect of the present invention, a refrigerator is also provided. The refrigerator comprises: a box body internally defining a compartment; an infrared sensing component disposed inside the compartment, comprising a plurality of infrared sensing devices for measuring the temperature of the stored items in the preset storage space in the compartment And temperature sensing group And the infrared sensing component is connected, and configured to calculate a difference between a maximum value and a minimum value of the temperature values measured by the plurality of infrared sensing devices, and determine a maximum weight coefficient and a minimum weight coefficient according to the magnitude of the difference, The maximum weight coefficient and the minimum weight coefficient are weight coefficients of the temperature maximum value and the temperature minimum value, and the temperature maximum value and the temperature minimum value are weighted and calculated, and the weighted sum calculation result is used as the sensing temperature value of the storage space. .

Optionally, the compartment is divided into a plurality of storage spaces, each of which is provided with an infrared sensing component for measuring the temperature of the stored articles therein; and the temperature sensing component, and the plurality of The infrared sensing components are respectively connected and configured to respectively calculate the sensing temperature values of the plurality of storage spaces as a basis for separately controlling the temperature of the plurality of storage spaces.

Optionally, the refrigerator further includes: a split air supply device configured to distribute the cooling airflow from the cold source to the plurality of storage spaces; and a refrigeration control component configured to respectively sense the temperature of each storage space The value is compared with a preset regional cooling on temperature threshold value of each storage space, and the cooling state identifier corresponding to the storage space whose sensed temperature value is greater than the regional cooling open temperature threshold is set to start, and the split bypass air supply device is driven It is operated to provide a state of cooling airflow to the storage space identified as being activated by the cooling state.

The method for sensing the temperature of the interior of the refrigerator compartment of the present invention acquires the measurement results of a plurality of infrared sensing devices that sense the temperature of the same storage space, and obtains the actual temperature of the storage space by comprehensively calculating and merging the data. The measured value improves the detection accuracy of the temperature in the refrigerator compartment.

Further, the refrigerator of the present invention uses the above calculated temperature value as a basis for temperature control, and can accurately determine the position and temperature of the indoor heat source between the refrigerators, and is convenient to control according to the condition of the heat source, and is the food in the refrigerator. Provide the best storage environment and reduce the nutrient loss of food.

The above as well as other objects, advantages and features of the present invention will become apparent to those skilled in the <

DRAWINGS

Some specific embodiments of the present invention are described in detail below by way of example, and not limitation. The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the figure:

1 is a schematic structural view of a refrigerator in accordance with one embodiment of the present invention;

2 is a schematic block diagram of a control unit of a refrigerator in accordance with one embodiment of the present invention;

3 is a schematic diagram of a refrigeration system of a refrigerator in accordance with one embodiment of the present invention;

4 is a schematic structural view of a refrigeration system of a refrigerator according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a sensing method of a temperature inside a refrigerator compartment according to an embodiment of the present invention; FIG.

6 is a flow chart of collecting data of an infrared sensing device in a sensing method of a temperature inside a refrigerator compartment according to an embodiment of the present invention;

Figure 7 is a flow diagram of a compartment for compartmentalized cooling in accordance with one embodiment of the present invention.

detailed description

1 is a schematic structural view of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a schematic block diagram of a control unit of the refrigerator according to an embodiment of the present invention. The refrigerator may generally include: a casing 110, an infrared sensing component 130, and a temperature sensing component 160. The casing 110 includes a top wall, a bottom wall, a rear wall, and two left and right side walls, and the front of the casing 110 is disposed. The door body (not shown) may be connected to the side wall by a pivot structure. The interior of the tank 110 defines an compartment (eg, a refrigerating compartment). The compartment can be divided into a plurality of storage spaces 140.

The infrared sensing component 130 is disposed inside the compartment, and includes a plurality of infrared sensing devices for measuring the temperature of the stored articles in the indoor preset storage space. The number of infrared sensing components 130 is set according to the number of storage spaces 140. In general, an infrared sensing component 130 can be provided for each storage space. Another way of configuring the infrared sensing component 130 is to use the transmission (screw drive, timing belt drive, etc.) to drive the infrared sensing component 130 to move in a plurality of storage spaces to respectively correspond to the plurality of storage spaces 140. The temperature is measured.

In order to improve the temperature sensing accuracy of the infrared sensing component 130 to the contents of the storage space 140, and satisfy the requirement of cooling the refrigerator compartment, the inventor has conducted a large number of tests on the installation position of the infrared sensing device, and the infrared transmission is obtained. The preferred mounting location of the sensing assembly 130 and its preferred configuration. Each of the infrared sensing components 130 has a height at the storage space 140 that is greater than one-half of the overall height of the storage space 140 (more preferably a range higher than or located in the storage space 140 as a whole) Two-thirds of the height), the infrared receiving center line of each infrared sensing device is set to a range of 70 degrees to 150 degrees with respect to the vertical direction (better range is 76 degrees to 140 degrees); and each The horizontal projection of the infrared receiving center line of the infrared sensing device is set at an angle ranging from 30 degrees to 60 degrees (more preferably from 30 degrees to 45 degrees).

The infrared sensing devices in the infrared sensing component 130 do not emit infrared rays, but passive receiving devices. The infrared rays and the background infrared rays emitted by the articles within the sensing range directly sense the change region and temperature of the indoor articles in the refrigerator, and are converted into corresponding electrical signals. Compared to the infrared sensors of the prior art, the infrared sensing device can detect the infrared rays of the entire storage space 140 instead of merely detecting the heat source point position. Moreover, the infrared sensing device can be an infrared receiver having a rectangular field of view. The infrared receiving device can limit the above rectangular rectangular field by setting the infrared guiding member, and improve the detection precision by limiting the detecting orientation to accurately detect the storage space 140.

Since the sensing field of view of a single infrared sensing device is limited, in the case where the storage space 140 has a large volume, for example, when the width or depth is large, an infrared sensing device may not be able to fully sense the storage space. The overall situation of 140. The infrared sensing component 130 can be combined with a plurality of infrared sensing devices to collectively sense the storage space 140.

For example, when the width of the refrigerator compartment is large, an infrared sensing device can be arranged on each of the two side walls of the storage space (in FIG. 1, because of being blocked by the side wall, only the infrared light provided on one side wall is shown). Sensing device), the infrared sensing device on the opposite side wall is arranged, and a part of the storage space can be sensed separately. If the front and rear depths of the refrigerator compartment are large, it is also possible to arrange a plurality of infrared sensing devices on one side wall.

The number of infrared sensing devices provided in each infrared sensing component 130 can be configured according to the sensing range of the infrared sensing device and the size of the storage space. The refrigerator of the embodiment is not limited to each infrared sensing component 130. Two infrared sensing devices may be composed of three or more infrared sensing devices, which may be arranged on the inner side of different sides of the box, for example, oppositely disposed on the two side walls, or may be arranged behind On the wall. The number of infrared sensing devices of the infrared sensing component 130 configured by different storage spaces 140 may be the same or different.

The compartment of the refrigerator of the present invention can be divided into a plurality of storage spaces. For example, the rack assembly 120 separates the compartment into a plurality of storage spaces 140. One preferred configuration is that the shelf assembly 120 includes at least one horizontally disposed partition to divide the compartment into a plurality of storage spaces 140 in a vertical direction. In FIG. 1, the rack assembly 120 includes a first partition, a second partition, and a third partition, wherein a first storage space is formed above the first partition, and between the first partition and the second partition A second storage space is formed, and a third storage space is formed between the second partition and the third partition. In other embodiments of the invention, the number of partitions in the rack assembly 120 and the number of storage spaces 140 may be pre-configured according to the volume of the refrigerator and the requirements for use. Each of the storage spaces 140 is provided with an infrared sensing component 130 for measuring the temperature of the items stored therein. The number and arrangement positions of the plurality of infrared sensing devices in the infrared sensing component 130 can be determined based on the condition of the storage space.

In the refrigerator in this embodiment, the measurement results of the plurality of infrared sensing devices of one infrared sensing component 130 can be comprehensively calculated to obtain a measurement result that can reflect the actual temperature of the storage space 140. In the embodiment shown in FIG. 2, each of the infrared sensor assemblies 130 includes a first infrared sensing device 131 and a second infrared sensing device 132, respectively, for temperature sensing of a storage space 140. The temperature sensing component 160 is respectively connected to the plurality of infrared sensing devices of each of the infrared sensing components 130, and configured to calculate the infrared according to the sensing results of the plurality of infrared sensing devices of the infrared sensing component 130. The temperature of the storage space 140 in which the sensing assembly 130 is located.

A calculation flow of the temperature sensing component 160 is to calculate a difference between a maximum value and a minimum value among temperature values measured by the plurality of infrared sensing devices, and determine a maximum weight coefficient and a minimum weight coefficient according to the magnitude of the difference, which will be the maximum The value weight coefficient and the minimum weight coefficient are weighted coefficients of the temperature maximum value and the temperature minimum value, and the temperature maximum value and the temperature minimum value are weighted and calculated, and the result of the weighted sum calculation is used as the sensing temperature value of the storage space.

The temperature sensing component 160 calculates the sensing temperatures of the plurality of storage spaces 140 by calculating the plurality of infrared sensing components 130, respectively.

The refrigerator of this embodiment may be an air-cooled refrigerator, and the cooling airflow from the cold source may be selectively distributed to the plurality of storage spaces 140 according to the sensed temperature of the storage space 140. The refrigeration control assembly 170 can be configured to compare the sensed temperature value of each of the storage spaces 140 with a respective regional refrigeration on temperature threshold for each of the storage spaces 140, the sensed temperature value being greater than the regional refrigeration on temperature threshold. The refrigeration state identifier corresponding to the storage space 140 is set to be activated, and the drive split air supply device is operated to a state in which the cooling airflow is provided to the storage space in which the cooling state is identified as being activated.

3 is a schematic view of a refrigeration system of a refrigerator according to an embodiment of the present invention, and FIG. 4 is a schematic structural view of a refrigeration system of a refrigerator according to an embodiment of the present invention. The refrigeration system includes: a duct assembly, a compressor, a refrigerating damper 250, a fan 230, and the like. The refrigerator can form a refrigeration cycle via a refrigerant pipe by means of an evaporator, a compressor, a condenser, a throttle element, and the like, and after the compressor is started, the evaporator releases the cooling amount.

The evaporator can be placed in the evaporator chamber. The air cooled by the evaporator is sent to the storage chamber via the fan 230. For example, the interior of the storage compartment of the refrigerator can be divided into a greenhouse, a refrigerating compartment and a freezing compartment, wherein the uppermost layer of the storage compartment is a refrigerating compartment, the lower compartment of the refrigerating compartment is a greenhouse, and the lower compartment of the greenhouse is a freezing compartment, and the evaporator compartment can be set. At the back of the freezer. The fan 230 is disposed at an outlet above the evaporator chamber. Correspondingly, the supply air path of the air cooled by the evaporator includes a temperature-changing supply air path connected to the variable greenhouse for supplying air to the greenhouse, and a frozen supply air for connecting the freezer to the freezer compartment. A road, and a refrigerating supply air path connected to the refrigerating compartment for supplying air to the refrigerating compartment.

In this embodiment, the air duct assembly is a wind path system that supplies air to the refrigerating chamber, and the air duct assembly includes: a duct bottom plate 210, a shunt air blowing device 220, and a fan 230. The air duct floor 210 defines a plurality of air passages 214 respectively leading to the plurality of storage spaces 140, and each of the air ducts 214 leads to a different storage space 140, for example, in the embodiment shown in FIG. There is a first air supply opening 211 leading to the first storage space, a second air supply opening 212 leading to the second storage space, and a third air supply opening 213 leading to the third storage space.

The branch air supply device 220 is disposed in the refrigerating supply air path, and the refrigerating supply air path is formed on the back surface of the refrigerating chamber, and the shunt air supply device 220 includes an air inlet 221 connected to a cold source (for example, an evaporator chamber) and respectively A plurality of distribution ports 222 connected by the air path 214. The dispensing ports 222 are connected to different air paths 214, respectively. The shunting device 220 can control the cold air from the cold source generated by the fan 230 to be distributed to different dispensing ports 222 through the air inlet 221, thereby entering different storage spaces of the refrigerating chamber through different air paths 214. 140.

The shunting air supply device 220 can centrally distribute the refrigerating airflow from the cold source instead of separately providing different air ducts for the different storage spaces 140, thereby improving the cooling efficiency. The shunting device 220 may include a housing 221, an adjusting member 224, and a cover plate 225. The casing 221 is formed with an air inlet 221 and a distribution port 222, and the cover plate 225 is assembled with the casing 221 to form a branch air supply chamber. The adjusting member 224 is disposed in the shunt air supply chamber. The adjusting member 224 has at least one shielding portion 226. The shielding portion 226 is movably disposed in the housing 221 and configured to control the plurality of dispensing openings 222 to adjust the respective air outlet areas of the plurality of dispensing openings 222. .

The air supply of the fan 230 is distributed to the different storage spaces 140 through the adjustment member 224. In the embodiment shown in FIG. 4, the split air supply device 220 can realize up to seven air supply states, for example, The utility model comprises: a distribution port 222 for opening to the first air supply port 211, and a separate opening for the distribution port 222 of the second air supply port 212 for separately opening to the distribution port 222 of the third air supply port 213 for supplying to the first air supply port 211 and the distribution port 222 of the second air supply port 212 are simultaneously opened, and the distribution ports 222 to the first air supply port 211 and the third air supply port 213 are simultaneously opened for the distribution ports to the second air supply port 212 and the third air supply port 213. The opening 222 is simultaneously opened and supplied to the first air supply port 211, and the distribution ports 222 for the second air supply port 212 and the third air supply port 213 are simultaneously opened. When the refrigerator of the present embodiment separates two storage spaces by one partition, the branch air supply device 220 may be provided with two distribution ports, and at the same time, three air supply states may be provided. When the split air supply is performed, the adjusting member 224 rotates, and the angle of rotation is determined according to the required air volume, and the guiding port formed between the shielding portions 226 is aligned with the corresponding points. Port 222.

The housing 221 is provided with a motor 227, two stop posts 228, and a positioning seat recess 243 in the shunt air supply chamber. The function of the stop post 228 is that the movement of the adjusting member 224 is more accurate during the operation of the motor 227. And each time the power is applied or after a period of time, the adjustment member 224 is moved to the starting stop post 228, and is rotated to the designated rotational position. The function of the positioning seat recess 243 is to ensure that the adjustment member 224 is positioned at an angular position of every 30 degrees of rotation. The adjusting member 224 is provided with a coil spring 229 (this coil spring 229 can also be replaced by a torsion spring), a weight 241 and a positioning pin 245. A section of the disc spring piece 229 is fixed to the cover plate 225, and the other end is biased to apply a reverse force as the adjusting member 224 is operated, and a certain biasing force is always applied to the adjusting member 224, thereby suppressing the stepping by the direct current. The problem of sloshing caused by the backlash of the motor 227 transmission mechanism. The pivot portion has a weight portion extending in a direction radially opposite to the body of the adjusting member 224, and a weight 241 is disposed at a distal end of the weight portion to eliminate the bias torque. The positioning pin 245 is movable up and down (by a compression spring) to the adjustment member 224. The housing 221 is provided with a positioning seat recess 243 that cooperates with it.

It should be noted that the refrigerator of the embodiment is described by taking an compartment having three storage spaces 140 as an example. In actual use, the infrared sensing component 130, the airway 214, and the distribution may be allocated according to specific usage requirements. The number of ports 222 and air supply ports are set to meet the requirements of different refrigerators. For example, according to the above description, it is easy to obtain an air supply system of a refrigerating compartment having two storage spaces.

The embodiment of the invention further provides a method for sensing the temperature of the interior of the refrigerator compartment. The method of sensing the temperature inside the refrigerator compartment may be performed by the temperature sensing component 160 in the refrigerator of the above embodiment to calculate the sensing temperature of the storage space 140 using the measured temperature values of the plurality of infrared sensing devices. The value is provided by the refrigeration control assembly 170 for zone cooling of the storage compartment. FIG. 5 is a schematic diagram of a sensing method of a temperature inside a refrigerator compartment according to an embodiment of the present invention. The sensing method of the temperature inside the refrigerator compartment may generally include:

Step S502, obtaining a plurality of temperature values measured by the infrared sensing component;

Step S504, calculating a difference between the maximum value and the minimum value among the plurality of temperature values;

Step S506, determining a maximum weight coefficient and a minimum weight coefficient according to the magnitude of the difference;

Step S508, using the maximum weight coefficient and the minimum weight coefficient as weight coefficients of the maximum value of the temperature and the minimum value of the temperature, and weighting and calculating the maximum value of the temperature and the minimum value of the temperature;

The result of the weighting sum calculation in step S508 can be used as the sensed temperature value of the storage space.

Step S506 includes a plurality of processes for determining the maximum weight coefficient and the minimum weight coefficient, wherein a preferred manner is to query the preset difference coefficient correspondence table to correspond to the size of the difference. The maximum weight coefficient and the minimum weight coefficient, and the difference coefficient corresponds to a maximum weight coefficient and a minimum weight coefficient corresponding to different numerical ranges in which the difference is set in the table.

In the difference coefficient correspondence table, when the difference is smaller than the first threshold, the maximum weight coefficient and the minimum weight coefficient are both 0.5; when the difference is greater than or equal to the first threshold and less than the second threshold, the maximum weight coefficient and The minimum weight coefficient is a preset value, and the sum of the two is 1; when the difference is greater than or equal to the second threshold, the maximum weight coefficient is 1 and the minimum weight coefficient is 0, wherein the first threshold is less than the second threshold .

For example, in the case where the infrared sensing component 130 includes N (N is an integer greater than 1) infrared sensing device, step S502 acquires N temperature values, which are respectively recorded as IR1, IR2, ..., IRN. Among the N temperature values, the maximum value is denoted by max (IR1, IR2, ..., IRN), and the minimum value is denoted by min (IR1, IR2, ..., IRN).

The difference Δ = max (IR1, IR2, ..., IRN) -max (IR1, IR2, ..., IRN) calculated in step S504. Assuming that the maximum weight coefficient is k and the minimum weight coefficient is m, the temperature value IR=max*k+min*m is sensed. Δ reflects the difference in measurement results of different infrared sensing devices in the same storage space, which may be caused by the temperature of articles at different locations in the storage space. Therefore, it is necessary to determine the values of k and m according to the value of Δ, above k and m. The value needs to satisfy the condition of k+m=1.

Table 1 shows an alternative calculation formula for sensing temperature values using a difference coefficient correspondence table:

Table 1

ΔΔ	Δ<1Δ<1	1≤Δ<21≤Δ<2	2≤Δ2≤Δ
IRIR	(max+min)/2(max+min)/2	maxk+minmMaxk+minm	maxMax

It can be concluded from the table that when Δ<1, k=0.5, m=0.5; when 1≤Δ<2, k and m take preset values, and the specific values can be summarized by a large number of tests in the refrigerator, for example k=0.75, and m=0.25; when 2≤Δ, it means that the difference of different infrared sensing devices is large, there are high temperature articles, so k=1, m=0, so max is used as the sensing temperature of the storage space. value.

In order to avoid an increase in the error caused by the fluctuation of the measurement result of the infrared sensing device, in the method of the embodiment, an optional process of step S502 is: separately receiving and recording the continuous reservation sensed by each infrared sensing device. a quantity of timing samples; and calculating a temperature value corresponding to the infrared sensing device based on the timed sample values. For example, when the infrared sensing sensor device performs sensing, the sampling value of the infrared sensing sensing device can be collected once every 0.1 ms (the value can be flexibly adjusted). Preferably, the plurality of infrared sensing sensing devices of each infrared sensing component 130 can simultaneously sample. In According to the timing sample value, the maximum sample value and the minimum sample value can be filtered out from the timing sample value when calculating the temperature value corresponding to the infrared sensor device; and the average of the timed sample values after filtering the maximum sample value and the minimum sample value is calculated. The value is used as the temperature value measured by the corresponding infrared sensing device.

In order to avoid abnormality of the measurement result of the infrared sensing device, after the step of receiving the timing sample value, it is also confirmed that the timing sample value belongs to a preset normal value interval, and records the sample value belonging to the normal value interval, which will exceed the normal value interval. The sample value within is set to invalid data; and if a predetermined number of sample values are all invalid data, a temperature measurement abnormality prompt signal is generated. The above normal value interval can be set according to the temperature of the refrigerator compartment, for example, set to -40 to 60 degrees Celsius. The temperature of the refrigerator compartment generally does not exceed this value range. When the sampling value exceeds this range, it can be considered that the measurement or acquisition process of the infrared sensor device is abnormal. Such abnormal data needs to be screened to avoid normal data. Interference.

6 is a flow chart of collecting data of an infrared sensing device in a sensing method of a temperature inside a refrigerator compartment according to an embodiment of the present invention. An example of data acquisition for a particular infrared sensing device is described below. The process includes:

In step S602, the acquisition starts and the parameters are initialized. The initialization includes: initializing the collected value storage queue, for example, clearing a storage queue of length S, S is the predetermined number, generally can be set to 10 or other preset values; initializing the queue sequence identifier, s= 0; alarm prompt flag initialization, Err=0.

Step S604, obtaining the value sensed by the infrared sensing device, and obtaining the sampled value T1;

Step S606, it is determined whether T1 belongs to the normal value interval, that is, whether it meets -40<T1<60, if yes, it is determined as normal data, step S608 is performed, if the denial is determined as abnormal data, step S618 is performed;

Step S608, Err is cleared, Err=0;

In step S610, it is determined whether the quantity collected meets the requirement, that is, whether s>S is satisfied; if yes, the acquisition is completed, step S612 is performed, and if the next acquisition is performed, step S616 is performed;

Step S612, sorting the storage queue, that is, IR(0)=IR(1), IR(1)=IR(2), ...IR(S-1)=IR(S), IR(S)=T1 Forming a circular storage queue, that is, overwriting the initial value;

Step S614, sorting IR(0), IR(1)...IR(S), screening the minimum value and the maximum value, and taking the remaining S-2 values to take the average value IR, and the calculation formula is IR=(IR(0) ) +IR(1)+...+IR(S)-max-min)/(S-2);

Step S616, enter the next value collection, IR (s) = T1, s = s + 1, return to execution S604;

Step S618, the alarm prompt identifier is accumulated, Err=Err+1;

Step S620, it is determined whether a continuous predetermined number of sample values are invalid data, that is, it is determined whether Err>S occurs, if step S622 is performed, if not, return to step S604;

In step S622, an abnormality prompt is output, and the measurement is stopped.

Through the above steps, the measurement error can be effectively reduced, and the measurement fluctuation of the infrared sensing device is prevented from affecting the final sensed temperature value.

After calculating the sensing temperature value of the infrared sensing device, the above-mentioned steps S502 to S508 can be performed to obtain the sensing temperature value IR of the storage space as a basis for the cooling control of the storage space.

Figure 7 is a flow diagram of a compartment for compartmentalized cooling in accordance with one embodiment of the present invention. When cooling compartments, you can perform the following steps in sequence:

Step S702, determining that the compartment enters a cooling state;

Step S704, acquiring a sensing temperature value of the storage space sensed by the plurality of infrared sensing components, where the sensing temperature value directly reflects the temperature of the stored item in the storage space;

Step S706, respectively comparing the sensed temperature value of each storage space with a preset regional cooling open temperature threshold of each storage space;

Step S708, setting a cooling state identifier corresponding to the storage space whose sensing temperature value is greater than the regional cooling on temperature threshold to be activated;

Step S710, driving the bypass air blowing device to operate to provide a state of cooling airflow to the storage space indicated as being activated by the cooling state.

The step of determining that the refrigerating compartment enters the cooling state in the above step S702 further comprises: obtaining an average temperature of the indoor environment; determining whether the average temperature of the indoor environment is greater than or equal to a preset overall cooling opening temperature threshold; if so, turning on the cold source and the split air supply A refrigerating damper is provided between the devices to bring the compartment into a cooling state.

Wherein, in a case where the average indoor temperature is less than a preset overall cooling on temperature threshold, it is determined whether the refrigerating damper is in an open state; if yes, determining an average temperature of the indoor environment and/or a sensing temperature of each storage space Whether the value satisfies the preset refrigerating compartment cooling stop condition; when the inter-chamber cooling stop condition is satisfied, the refrigerating damper is closed.

The above compartment refrigeration stop condition may include: the sensed temperature value of each storage space is smaller than a preset regional cooling off temperature threshold of each storage space, wherein the area of each storage space is The cold shutdown temperature threshold is less than the regional refrigeration on temperature threshold; or the indoor ambient average temperature is less than the preset overall refrigeration shutdown temperature threshold.

Another optional compartment refrigeration stop condition includes: when the indoor ambient average temperature is less than a preset overall refrigeration shutdown temperature threshold, the sensed temperature value of each storage space is less than each storage space a preset area cooling on temperature threshold, wherein the area cooling off temperature threshold of each storage space is smaller than the area cooling on temperature threshold, or the difference between the overall cooling off temperature threshold minus the indoor indoor average temperature is greater than a preset margin value.

After step S706, the temperature of the items stored in each storage space may also be compared with a preset regional cooling shutdown temperature threshold of each storage space, wherein the regional cooling off temperature threshold of each storage space is smaller than the regional cooling The temperature threshold is turned on; and the cooling state identifier corresponding to the storage space where the item temperature is less than the regional cooling off temperature threshold is set to off.

By using the flow of the above steps S702 to S710, the cooling temperature is controlled by the sensing temperature of the storage space obtained by the sensing method of the indoor temperature of the refrigerator compartment of the embodiment, and the temperature measurement accuracy is improved, and the temperature measurement accuracy can be performed in time and effectively. The refrigeration control avoids the influence of high temperature objects on the surrounding storage space, improves the storage effect of the refrigerator freezer, reduces the nutrient loss of food, and avoids the waste of electric energy caused by the entire compartment refrigeration.

In this regard, it will be appreciated by those skilled in the <RTIgt;the</RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Therefore, the scope of the invention should be understood and construed as covering all such other modifications or modifications.

Claims

A method for sensing a temperature inside a refrigerator compartment, comprising:

Acquiring a plurality of temperature values measured by the infrared sensing component, the infrared sensing component comprising a plurality of infrared sensing devices for measuring a temperature of the stored items in the indoor preset storage space of the refrigerator;

Calculating a difference between a maximum value and a minimum value of the plurality of temperature values;

Determining a maximum weight coefficient and a minimum weight coefficient according to the magnitude of the difference;

Using the maximum weight coefficient and the minimum weight coefficient as weight coefficients of a temperature maximum value and a temperature minimum value, and weighting and calculating the temperature maximum value and the temperature minimum value;

The result of the weighted sum calculation is taken as the sensed temperature value of the storage space.
The method of claim 1, wherein the determining the maximum weight coefficient and the minimum weight coefficient according to the magnitude of the difference comprises:

Querying, from the preset difference coefficient correspondence table, a maximum weight coefficient and a minimum weight coefficient corresponding to the magnitude of the difference, where the difference coefficient correspondence table corresponds to a different numerical range in which the difference is set Maximum weight coefficient and minimum weight coefficient.
The method according to claim 2, wherein in said difference coefficient correspondence table,

When the difference is less than the first threshold, the maximum weight coefficient and the minimum weight coefficient are both 0.5;

When the difference is greater than or equal to the first threshold and less than the second threshold, the maximum weight coefficient and the minimum weight coefficient are both preset values, and the sum of the two is 1;

When the difference is greater than or equal to the second threshold, the maximum weight coefficient is 1 and the minimum weight coefficient is 0, wherein the first threshold is less than the second threshold.
The method of claim 1 wherein the step of obtaining a plurality of temperature values measured by the infrared sensing component comprises:

Receiving and recording, respectively, a consecutive predetermined number of timing sample values sensed by each of the infrared sensing devices;

Calculating the temperature value measured by the corresponding infrared sensing device according to the timing sample value.
The method of claim 4, wherein the step of calculating the temperature value measured by the corresponding infrared sensing device based on the timing sample value comprises:

The maximum sampled value and the minimum sampled value are screened out in the timing sample value;

An average value of the timing sample values after the maximum sample value and the minimum sample value are screened is calculated, and the average value is used as the temperature value measured corresponding to the infrared sensor device.
The method of claim 4, wherein after the step of receiving the timing sample value further comprises:

Confirming that the timing sample value belongs to a preset normal value interval, and recording a sample value belonging to the normal value interval, and setting a sample value exceeding the normal value interval as invalid data;

If the predetermined number of sample values are all invalid data continuously, a temperature measurement abnormality prompt signal is generated.
The method according to any one of claims 1 to 6, wherein the refrigerator compartment is partitioned into a plurality of said storage spaces, one for each of said storage spaces for measuring internal storage thereof The infrared sensing component of the temperature of the article, and the method further comprising:

The sensing temperature values of the plurality of storage spaces are respectively calculated as a basis for temperature control of the storage space.
The method according to claim 7, wherein said refrigerator is provided with a bypass air supply device, said split air supply device being configured to distribute a refrigerant air flow from a cold source to a plurality of said storage spaces, and in separate The step of calculating the sensed temperature values of the plurality of storage spaces further includes:

Comparing the sensed temperature values of each of the storage spaces with respective predetermined regional cooling on temperature thresholds of each of the storage spaces;

Setting a cooling state identifier corresponding to the storage space whose sensing temperature value is greater than the regional cooling on temperature threshold to be activated;

Driving the shunt blower to operate to provide the state of the refrigerating airflow to the storage space identified as being activated by the refrigerating state.
A refrigerator comprising:

a cabinet having an interior compartment defined therein;

An infrared sensing component disposed inside the compartment, comprising a plurality of infrared sensing devices for measuring a temperature of an item stored in the preset storage space in the compartment;

a temperature sensing component, coupled to the infrared sensing component, and configured to calculate a difference between a maximum value and a minimum value of the temperature values measured by the plurality of infrared sensing devices, and determine a maximum value according to the magnitude of the difference a weight coefficient and a minimum weight coefficient, wherein the maximum weight coefficient and the minimum weight coefficient are weight coefficients of a temperature maximum value and a temperature minimum value, and weighting and calculating the temperature maximum value and the temperature minimum value And using the result of the weighted sum calculation as the sensed temperature value of the storage space.
A refrigerator according to claim 9, wherein

The compartment is partitioned into a plurality of the storage spaces, each of the storage spaces being provided with an infrared sensing component for measuring a temperature of an item stored therein;

The temperature sensing component is respectively connected to the plurality of infrared sensing components, and configured to: respectively calculate a sensing temperature value of the plurality of storage spaces, as a plurality of the storage spaces The basis for temperature control is separately performed.
The refrigerator according to claim 10, further comprising:

a split air supply device configured to distribute a cooling air flow from the cold source to the plurality of storage spaces;

a refrigeration control assembly configured to compare a sensed temperature value of each of the storage spaces with a respective regional cooling on temperature threshold of each of the storage spaces, the sensed temperature value being greater than the A cooling state identifier corresponding to the storage space of the regional cooling on temperature threshold is set to be activated, and the bypass air supply device is driven to operate to provide the cooling airflow to the storage space identified as being activated by the cooling state.