WO2018095334A1 - 用于检测冰箱内是否放入温度异常物品的方法 - Google Patents

用于检测冰箱内是否放入温度异常物品的方法 Download PDF

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Publication number
WO2018095334A1
WO2018095334A1 PCT/CN2017/112386 CN2017112386W WO2018095334A1 WO 2018095334 A1 WO2018095334 A1 WO 2018095334A1 CN 2017112386 W CN2017112386 W CN 2017112386W WO 2018095334 A1 WO2018095334 A1 WO 2018095334A1
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WIPO (PCT)
Prior art keywords
temperature
value
abnormal
storage space
item
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Ceased
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PCT/CN2017/112386
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English (en)
French (fr)
Inventor
李春阳
王铭
苗建林
牟森
赵斌堂
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Qingdao Haier Co Ltd
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Qingdao Haier Co Ltd
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Publication of WO2018095334A1 publication Critical patent/WO2018095334A1/zh
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/003—Arrangement or mounting of control or safety devices for movable devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/06—Sensors detecting the presence of a product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/121—Sensors measuring the inside temperature of particular compartments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/123—Sensors measuring the inside temperature more than one sensor measuring the inside temperature in a compartment

Definitions

  • the present invention relates to a refrigerating and freezing apparatus, and more particularly to a method for detecting whether an abnormal temperature item is placed in a refrigerator.
  • Conventional refrigerators typically sense the temperature around their arrangement using a temperature sensor disposed inside the storage compartment, which is used as a basis for refrigeration control.
  • 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.
  • the storage compartment is divided into a plurality of relatively independent storage spaces by the shelf partition
  • the hot food Putting in the temperature that affects the storage space in which it is stored will allow the various bacteria that originally exist in the food inside the refrigerator to grow faster, which is not conducive to the healthy and safe preservation of food; on the other hand, if it is to the storage room Indiscriminate cooling as a whole can result in wasted energy and slow down the storage space in which hot food is placed.
  • the present invention has been made in order to overcome the above problems or at least partially solve the above problems.
  • Another further object of the invention is to improve the accuracy of the refrigeration control of the refrigerator.
  • the present invention provides a method for detecting whether or not a temperature abnormality item is placed in a refrigerator, wherein the refrigerator includes: a case that is internally divided into a plurality of storage spaces, and is disposed at a front portion of the case a door body, and a plurality of infrared sensors respectively sensing temperature of the plurality of storage spaces, and the method comprises:
  • obtaining a first temperature change value of the abnormal storage space before and after the temperature abnormality item may be placed, and performing heat between the external environment before and after the abnormal temperature item may be placed
  • the second temperature change value caused by the exchange
  • determining whether the abnormal storage space exists in the plurality of storage spaces comprises:
  • any one of the plurality of infrared sensors has a case where the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value, determining the plurality of The abnormal storage space exists in the storage space, and the storage space corresponding to the infrared sensor whose absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value is the abnormal storage. space;
  • the absolute value of the difference between the temperature values collected by each of the infrared sensors is less than or equal to the first preset value, it is determined that the plurality of storage spaces are not There is the abnormal storage space.
  • the step of obtaining the first temperature change value includes:
  • the first temperature value of the infrared sensor corresponding to the abnormal storage space when the absolute value of the difference between the temperature values of the adjacent two acquisitions is greater than the first preset value
  • the temperature value of the object space before it may be placed in an abnormal temperature item, where E ⁇ 3;
  • the temperature values of the consecutive M acquisitions satisfy the adjacent two times.
  • the second temperature value collected by the infrared sensor corresponding to the abnormal storage space at any time in the continuous M acquisition is recorded as the abnormal storage.
  • a temperature value of the object space after the temperature abnormality item may be placed, wherein M ⁇ 3 and the second preset value is less than or equal to the first preset value;
  • the temperature value of the first or last acquisition of the infrared sensor corresponding to the abnormal storage space in the continuous M acquisition is recorded as the abnormal storage space before the temperature abnormality item may be placed Temperature value.
  • the step of acquiring the second temperature change value includes:
  • the second temperature change value is equal to an average of a difference between the second normal temperature value collected by all the normal infrared sensors and the first normal temperature value. value.
  • the step of determining whether the abnormal temperature item is placed in the abnormal storage space according to the first temperature change value and the second temperature change value comprises:
  • the third preset value is greater than or equal to the first preset value.
  • the number of the infrared sensors is three or more.
  • controlling the plurality of infrared sensors to collect temperature values is performed after the door body is opened for a predetermined time.
  • the method further includes:
  • a visual and/or audible signal is sent to alert the user;
  • the method for detecting whether an abnormal temperature item is placed in a refrigerator first determining whether there is an abnormal storage space in a plurality of storage spaces that may be placed in an abnormal temperature item, and further passing the abnormal storage space at a possible temperature
  • the first temperature change value before and after the abnormal item and the second temperature change value caused by the heat exchange between the external environment before and after the abnormal temperature item are placed, and whether the abnormal temperature item is placed in the abnormal storage space is determined.
  • the principle of determining whether an abnormal temperature item is placed in the abnormal storage space of the present invention mainly utilizes the temperature change of the storage space caused by the hot food and the indoor and outdoor heat exchange during the opening of the refrigerator door, and the storage space inside and outside the refrigerator door opening period. The natural changes in temperature caused by heat exchange are compared to determine whether or not an overheated food is placed in a certain storage space.
  • the method of the present invention can more accurately determine whether an overheated food is placed in a certain storage space, and can alert the user when it is judged that the overheated food is placed in the storage space, so that the user is in an abnormal temperature condition.
  • the temperature tends to be normal before putting it in the refrigerator Vietnamese. To some extent, avoid or reduce the adverse effects on the refrigerator and its storage due to the presence of hot items in the refrigerator.
  • the present invention can more accurately distinguish the reason why the temperature of the storage space rises during the opening of the door is because the food is placed at a higher temperature or the heat exchange is caused only by the natural convection between the external environment and the storage space, thereby It is beneficial to the refrigerator to carry out more reasonable and appropriate cooling control for specific situations.
  • FIG. 1 is a schematic structural view of a refrigerator in accordance with one embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a method for detecting whether a temperature abnormality item is placed in a refrigerator according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a method of determining whether an abnormal storage space exists in a refrigerator according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a method of acquiring a first temperature change value, in accordance with one embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a method of acquiring a second temperature change value according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a method of determining whether an abnormal temperature food is placed in an abnormal storage space according to an embodiment of the present invention
  • Figure 7 is a detailed flow chart for detecting whether a temperature abnormality item is placed in a refrigerator in accordance with one embodiment of the present invention.
  • the refrigerator may generally include a case 110 and a plurality of infrared sensors 130.
  • the box body 110 may be surrounded by a top wall, a bottom wall, a rear wall and two left and right side walls.
  • a door body (not shown) is disposed in front of the box body 110, and the door body may be connected to the side wall by a pivot structure.
  • the interior of the tank 110 defines a storage compartment (eg, a refrigerating compartment).
  • the storage compartment may be partitioned into a plurality of storage spaces 140.
  • the storage compartment is separated into a plurality of storage spaces 140, for example, by a rack assembly 120.
  • the rack assembly 120 includes at least one horizontally disposed partition to divide the storage compartment into a plurality of storage spaces 140 in a vertical direction.
  • 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.
  • the number of partitions in the rack assembly 120 and the storage space 140 The number can be pre-configured according to the volume of the refrigerator and the use requirements.
  • a plurality of infrared sensors 130 are disposed inside the storage compartment for measuring the temperatures of the respective storage spaces 140, respectively.
  • the number of infrared sensors 130 is set according to the number of storage spaces 140, and each storage space 140 may be provided with an infrared sensor 130.
  • the inventors conducted a large number of tests on the installation position of the infrared sensor 130, and obtained the infrared sensor 130. Preferred installation location and its preferred configuration.
  • the infrared sensor 130 is at a height of one-half of the height of the storage space 140 in its storage space 140 (more preferably, it is higher than or two-thirds of the overall height of the storage space 140), infrared
  • the infrared receiving center line of the sensor 130 is set to a range of 70 degrees to 150 degrees with respect to the vertical direction (more preferably, the range is 76 degrees to 140 degrees); and the horizontal projection of the infrared receiving center line of the infrared sensor 130 and the side thereof
  • the angle of the wall is set to range from 30 degrees to 60 degrees (more preferably from 30 degrees to 45 degrees).
  • the infrared sensor 130 does not emit infrared rays, but passively receives infrared rays and background infrared rays emitted by the articles in the sensing range, directly senses the change region and temperature of the temperature of the articles in the storage space 140, and converts them into corresponding electrical signals.
  • the measurement results of two adjacent infrared sensors 130 can be calculated to obtain the temperature rise of each storage space 140, and then according to the temperature rise of the storage space 140. It is determined whether a certain storage space 140 is placed in an abnormal temperature item.
  • the temperature abnormality item herein is an item whose temperature is too high or too low.
  • the refrigerator is provided with more than three storage spaces 140, and correspondingly, the refrigerator is provided with three or more infrared sensors 130. Since the temperature abnormality items are placed at most in the two storage spaces 140 of the refrigerator at the same time, even if the two storage spaces 140 simultaneously place the temperature abnormal items, the other storage spaces 140 are not placed with the temperature abnormal items at the same time.
  • the method for detecting whether an abnormal temperature item is placed in the refrigerator may generally include:
  • Step S102 after the door body is opened, the plurality of infrared sensors 130 are controlled to collect the temperature value.
  • Step S104 judging whether there is an abnormal storage space in the plurality of storage spaces 140 that may be placed in the abnormal temperature item according to the temperature value of each of the infrared sensors 130 collected twice during the opening of the door body.
  • Step S106 if it is determined that there is an abnormal storage space, the first temperature change value of the abnormal storage space before and after the temperature abnormality item may be acquired and the heat exchange between the abnormal storage space and the external environment before and after the abnormal temperature item may be placed The resulting second temperature change value.
  • Step S108 determining whether the temperature is placed in the abnormal storage space according to the first temperature change value and the second temperature change value. Anomalous items.
  • the opening and closing state of the door body can be detected by the door opening detecting device of the refrigerator.
  • the door opening detecting device can detect by using a fan switch, a magnetic sensitive switch, a Hall switch, and the like, and generate different electrical signals when the door body is completely closed or opened to indicate the state of the door body.
  • the plurality of infrared sensors 130 may be controlled to collect temperature values after the door is opened for a predetermined time.
  • the preset time can be, for example, 2 to 3 seconds.
  • the infrared sensor 130 collects the temperature value just after the door body is opened, and delays for a predetermined time to avoid a sudden change in the temperature value collected by the infrared sensor 130 due to the airflow disturbance.
  • the infrared sensor 130 can perform an acquisition every 0.1 ms (this value can be flexibly adjusted). Multiple infrared sensors 130 can simultaneously acquire.
  • the process of determining whether there are abnormal storage spaces in the plurality of storage spaces 140 that may be placed in the temperature abnormality items in the step S104 includes a plurality of, and a preferred manner may be referred to the steps S1041 to S1043 shown in FIG.
  • Step S1041 determining whether there is any infrared sensor 130 during the door opening period where the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value; if yes, executing step S1042; if not, executing the step S1043.
  • step S1042 it is determined that there is an abnormal storage space in the plurality of storage spaces 140, and the storage space corresponding to the infrared sensor 130 whose absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value is greater than the first predetermined value. All are abnormal storage spaces.
  • step S1043 it is determined that there is no abnormal storage space in the plurality of storage spaces 140.
  • the flow of the step S104 preferably includes: if the infrared sensor 130 of any one of the plurality of infrared sensors 130 has a difference in the absolute value of the temperature values of the two adjacent acquisitions that is greater than the first preset during the opening of the door body In the case of a value (ie, a sudden change in the temperature value collected by any of the infrared sensors 130), it is determined that there is an abnormal storage space in the plurality of storage spaces 140, and the absolute difference of the temperature values of each of the two adjacent acquisitions is absolute.
  • the storage space 140 corresponding to the infrared sensor 130 whose value is greater than the first preset value is an abnormal storage space; during the opening of the door body, if the absolute value of the difference between the temperature values collected by each infrared sensor 130 is twice If the first preset value is less than or equal to the first preset value, it is determined that there is no abnormal storage space in the plurality of storage spaces 140.
  • the size of the first preset value can be obtained experimentally.
  • the difference between the temperature values detected by the infrared sensor 130 adjacent to the infrared sensor 130 caused by the heat exchange between the external environment during the opening of the storage space 140 (the difference may be recorded as the first difference) ) can be obtained by extensive testing of the refrigerator.
  • the difference in temperature values of the two adjacent detections of the infrared sensor 130 caused by the heat exchange between the storage space 140 and the external environment during the opening of the storage space (the difference) It can be recorded as the second difference) should be greater than the first difference described above.
  • a certain storage space 140 of the refrigerator is placed at a temperature of 60 ° C (or 50 ° C) during the opening of the door.
  • the first preset value can be set, for example, to 0.6 ° C or 0.7 ° C or the like.
  • an optional process of step S104 is: comparing the temperatures collected by the plurality of infrared sensors 130 at the same acquisition time or the same acquisition time, and the temperature is significantly higher than the infrared sensors 130 of the other infrared sensors 130.
  • the corresponding storage space 140 is an abnormal storage space.
  • an optional process of step S104 is to manually input, by the user, whether there is an abnormal storage space in the plurality of storage spaces 140, and which storage space 140 is an abnormal storage space.
  • step S104 if it is determined in step S104 that there is no abnormal storage space, it is determined that none of the plurality of storage spaces 140 are placed in the temperature abnormality during the opening of the door. That is to say, during the opening of the door, if all the infrared sensors 130 do not have the absolute value of the difference between the temperature values of the two adjacent acquisitions being greater than the first preset value, it is determined that there is no abnormal storage space, and further judgment is made. During the opening of the door body, none of the plurality of storage spaces 140 are placed in the temperature abnormality item.
  • step S106 the flow of acquiring the first temperature change value includes a plurality of, and a preferred manner may be referred to step S1061 to step S1064 shown in FIG.
  • Step S1061 recording the first temperature value of the most recent E-times collected by the infrared sensor 130 corresponding to the abnormal storage space when the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value, as the abnormal storage space.
  • the temperature value before the temperature abnormality item may be placed, where E ⁇ 3.
  • Step S1062 determining that the infrared sensor 130 corresponding to the abnormal storage space satisfies the adjacent two temperature values after the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value. The case where the absolute value of the difference between the temperature values acquired is less than the second predetermined value is obtained, and if yes, step S1063 is performed.
  • step S1063 the second temperature value collected by the infrared sensor 130 corresponding to the abnormal storage space at any time in the continuous M acquisition is recorded as the temperature value of the abnormal storage space after the temperature abnormality item may be placed.
  • Step S1064 calculating a difference between the second temperature value and the first temperature value as the first temperature change value.
  • M ⁇ 3 and the second preset value is less than or equal to the first preset value.
  • the size of the second preset value can be obtained experimentally. In the case of a refrigerator, after a temperature abnormality item is placed in a certain storage space 140, the temperature in the abnormal storage space first rises at a faster rate and then tends to be stable. When the temperature in the abnormal storage space tends to be stable, the temperature value of the corresponding infrared sensor 130 collected in any of the consecutive M acquisitions satisfies the difference between the temperature values of the adjacent two acquisitions is smaller than the second value. default value. At this time, the temperature value collected at any one of the continuous M acquisitions can be used as the temperature after the abnormal storage space is placed in the temperature abnormality item.
  • the second preset value can be set, for example, to 0.5 ° C or 0.4 ° C or the like.
  • the second temperature value is the infrared sensor 130 corresponding to the abnormal storage space for consecutive M times.
  • the temperature value of the first or last acquisition in the acquisition Therefore, in step S1063, the temperature value of the first or last acquisition of the infrared sensor 130 corresponding to the abnormal storage space in the continuous M acquisition is recorded as the temperature value of the abnormal storage space before the temperature abnormality item may be placed. .
  • step S106 the flow of acquiring the second temperature change value includes a plurality of, and a preferred manner may be referred to step S1065 to step S1067 shown in FIG. 5.
  • Step S1065 determining that the remaining values of the difference between the temperature values of the two adjacent acquisitions of the infrared sensor 130 corresponding to the abnormal storage space in the remaining infrared sensor 130 are greater than the first preset value, and appearing consecutively M times twice.
  • the absolute value of the difference between the collected temperature values is less than the second preset value, the normal infrared sensor in the case where the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value does not occur.
  • the infrared sensor 130 corresponding to the other storage space 140 is abrupt, and the infrared sensor 130 that has not abruptly changed is recorded as a normal infrared sensor.
  • the number of infrared sensors 130 is greater than or equal to three, such that even if two storage spaces 140 are simultaneously placed in the temperature abnormality item, the temperature values collected by the corresponding two infrared sensors 130 are abruptly changed. There may also be an infrared sensor 130 that has not mutated during the period before and after the abnormal storage space may be placed in the temperature abnormality item.
  • Step S1066 recording the normal infrared sensor (that is, when the absolute value of the difference between the temperature values of the two adjacent acquisitions of the infrared sensor 130 corresponding to the abnormal storage space is greater than the first preset value, the occurrence of consecutive M times is adjacent twice.
  • the absolute value of the difference between the collected temperature values is less than the second preset value
  • the infrared sensor 130 in the case where the absolute value of the difference between the temperature values of the adjacent two acquisitions is not greater than the first preset value is in the abnormal storage space.
  • the corresponding first temperature value and the second normal temperature value are collected when the corresponding infrared sensor 130 collects the first temperature value and the second temperature value.
  • step S1067 a difference between the second normal temperature value and the first normal temperature value is calculated as a second temperature change value.
  • the second temperature change value is equal to the difference between the second end temperature value collected by each normal infrared sensor and the first normal temperature value.
  • the second temperature change value may be equal to a difference between the second normal temperature value collected by any one of the normal infrared sensors and the first normal temperature value, preferably equal to the number of all normal infrared sensors. The average of the difference between the normal temperature value and the first normal temperature value.
  • step S1065 to step S1067 the temperature rise of the other storage space 140 due to heat exchange between the external environment and the abnormal environment before and after the abnormal storage space may be placed into the abnormal temperature space is approximated as an abnormal storage space during this period due to the external The temperature rise caused by the heat exchange between the environment and it.
  • the temperature change curve of the infrared sensor 130 measured by the specific refrigerator under different ambient temperatures and different internal temperatures of the refrigerator, after the door is opened, and before the door is closed can be obtained experimentally, thereby determining the abnormal storage space. Temperature rise due to heat exchange between the external environment and the environment before and after the abnormal temperature items may be placed.
  • Step S108 determining, according to the first temperature change value and the second temperature change value, whether the temperature abnormality object is placed in the abnormal storage space includes a plurality of processes, and a preferred manner may be referred to step S1081 to the step shown in FIG. S1083.
  • Step S1081 determining whether the difference between the first temperature change value and the second temperature change value is greater than a third preset value, and if yes, executing step S1082; if not, executing step S1083.
  • step S1082 it is determined that an abnormal temperature item is placed in the abnormal storage space.
  • step S1083 it is determined that the abnormal temperature item is not placed in the abnormal storage space.
  • the third preset value may be greater than or equal to the first preset value.
  • the size of the third preset value is related to the lowest temperature of the abnormal temperature item identified by the refrigerator. For example, if the refrigerator considers that the item having a temperature higher than 40 ° C is a temperature abnormal item, an item of 40 ° C may be placed in a certain storage space 140, and the size of the third preset value is determined experimentally.
  • a visual and/or audible signal may be issued to alert the user that the temperature of the item placed in the corresponding storage space 140 is abnormal.
  • a specific music or ringtone or voice prompt may be issued through a built-in sounding device in the refrigerator, and/or a text reminder may be issued through a display device provided on the door of the refrigerator, and/or a user may be alerted by lighting or flashing an indicator light.
  • the plurality of infrared sensors 130 may continue to acquire temperature values, and perform steps S104 to S108 again.
  • the abnormal storage may be determined. After the temperature abnormal food is placed in the object space, it is judged whether the storage space 140 corresponding to the other mutated infrared sensor 130 is placed in the temperature abnormal food. For the method of determining whether the storage space 140 corresponding to the infrared sensor 130 of another mutation is placed in the temperature abnormal food, refer to steps S106 to S108.
  • Figure 7 is a detailed flow chart for detecting whether a temperature abnormality item is placed in a refrigerator in accordance with one embodiment of the present invention.
  • the number of infrared sensors 130 is three.
  • step S201 it is determined whether the door body is open, and if so, step S202 is performed.
  • Step S202 after N seconds delay, the three infrared sensors 130 acquire the temperature value IR(1).
  • N is 2 to 3 seconds.
  • step S204 the three infrared sensors 130 continue to collect the temperature value IR(2).
  • step S206 the three infrared sensors 130 continue to collect the temperature value IR(n).
  • Step S208 determining whether the absolute value of the difference between the temperature value IR(n) currently collected by any of the infrared sensors 130 and the last collected temperature value IR(n-1) is greater than the first preset value A; if yes, determining that The temperature value collected by the infrared sensor 130 is abrupt, and step S210 is performed; if not, the temperature values collected by the three infrared sensors 130 are not found to have occurred. If it is changed, step S209 is performed. In the present invention, if it is determined that the temperature value collected by a certain infrared sensor 130 is abrupt, it means that the storage space 140 corresponding to the infrared sensor 130 is likely to be placed in an abnormal temperature item, resulting in the temperature of the storage space 140. A mutation has occurred.
  • step S209 it is determined whether the door body is open, and if so, the process returns to step S206; if not, step S211 is performed.
  • step S211 it is determined that each of the storage spaces 140 is not placed in the temperature abnormal item.
  • step S210 the temperature values IR(n-2) and the acquisition time t0 collected by the nth-2th time of the three infrared sensors 130 are recorded.
  • the infrared sensor 130 identified as a sudden change in the collected temperature value in step S208 is referred to as a first infrared sensor, and the other two infrared sensors 130 are recorded as a second infrared sensor and a third infrared sensor, and three infrared sensors are recorded. 130
  • the temperature value IR(n-2) collected twice before the temperature value acquired by the first infrared sensor is abrupt.
  • the temperature values of the first infrared sensor, the second infrared sensor, and the third infrared sensor may be represented by IR1(n-2), IR2(n-2), and IR3(n-2), respectively.
  • step S212 the three infrared sensors 130 continue to collect the temperature value IR(n+1).
  • Step S214 determining whether the infrared sensor 130 (ie, the first infrared sensor) in which the absolute value of the difference between the acquired value IR(n) and the collected value IR(n-1) is greater than the first preset value A occurs continuously M
  • the temperature values of the secondary acquisitions all satisfy the absolute value of the difference between the two adjacent times is less than the second preset value B, and if so, step S216 is performed.
  • Step S216 recording the first acquisition value IR(m) of the three infrared sensors 130 in the continuous M acquisitions and the last acquisition time t1 in the continuous M acquisitions; the available IR1(m), IR2(m), IR3 (m) respectively represent the temperature values first collected by the first infrared sensor, the second infrared sensor, and the third infrared sensor in the aforementioned consecutive M acquisitions.
  • Step S218, determining whether the absolute values of the difference between the two acquired values of the two other infrared sensors 130 during the period from t0 to t1 are greater than the first preset value A, that is, determining the second infrared sensor and the third infrared Whether the temperature values collected by the sensor during t0 ⁇ t1 are not abrupt. If yes, it is determined that the temperature values collected by the second infrared sensor and the third infrared sensor during t0 to t1 are not abrupt, and step S220 is performed; if not, it is determined that there is one of the second infrared sensor and the third infrared sensor. The temperature value acquired during t0 to t1 is abrupt, and step S219 is performed.
  • the present invention it is only possible to place temperature abnormal items in the two storage spaces 140 at the same time by default, that is, the temperature in a storage space 140 in which the temperature abnormality items are placed. Before stabilizing, it is only possible to have another storage space 140 placed in the temperature abnormality item, which means that at least one of the three infrared sensors 130 has not mutated the temperature value collected during t0 ⁇ t1.
  • step S219 it is assumed that the infrared sensor 130 whose temperature value acquired during t0 to t1 has not changed is a second infrared sensor. It is determined whether IR1(m)-IR1(n-2)-(IR2(m)-IR2(n-2)) is greater than a third preset value C, and if yes, step S222 is performed; if no, step S224 is performed. In step S219, the abnormal storage space collected by the first infrared sensor is used.
  • step S222 is performed to identify the abnormal storage space. If the difference between the two is less than or equal to the third preset value, step S224 is performed to determine that the abnormal temperature item is not placed in the abnormal storage space.
  • Step S220 determining whether IR1(m)-IR1(n-2)-(IR2(m)-IR2(n-2)+IR3(m)-IR3(n-2))/2 is greater than a third preset value C, if yes, execute step S222; if no, execute step S224.
  • the abnormal storage space collected by the first infrared sensor may be placed in the abnormal temperature item.
  • step S222 is performed to determine that the abnormal storage space is within the abnormal storage space. If the difference between the two is less than or equal to the third preset value, step S224 is performed to determine that the abnormal temperature item is not placed in the abnormal storage space.
  • Step S222 determining that the storage space 140 corresponding to the infrared sensor 130 (ie, the first infrared sensor) whose absolute value of the difference between the collected value IR(n) and the collected value IR(n-1) is greater than the first preset value A Put in abnormal temperature items.
  • Step S224 determining that the storage space 140 corresponding to the infrared sensor 130 (ie, the first infrared sensor) whose absolute value of the difference between the collected value IR(n) and the collected value IR(n-1) is greater than the first preset value A No abnormal temperature items were placed.
  • step S201 may be returned.
  • a reminder may be issued, such as lighting an indicator light corresponding to the abnormal storage space to remind the user to place a temperature abnormality item in the storage space 140.
  • the determination result of step S220 may be sent to the main control board of the refrigerator to participate in the control of the refrigeration system of the refrigerator.
  • the refrigeration system is caused to supply more cooling capacity to the storage space 140 to lower its temperature to a preset storage temperature as soon as possible.
  • step S2128 after determining that the temperature value collected by the third infrared sensor is abrupt in step S218, it may further determine whether a temperature abnormal item is placed in the storage space 140 corresponding to the third infrared sensor. For the specific process, refer to step S210 to step S222 or step S224.
  • the number n 3 of acquisitions in which the third infrared sensor is abruptly recorded, and the temperature values IR1 (n 3 -2) and IR2 (n 3 -2) collected by the three infrared sensors in n 3 - 2 times may be recorded.
  • IR3(n 3 -2) and the acquisition time t 3 0, and when the temperature values of the continuous M acquisitions of the third infrared sensor satisfy the absolute value of the difference between the adjacent two times is less than the second preset value B, Record the first acquisition value IR(m 3 ) of the three infrared sensors 130 in the continuous M acquisitions and the last acquisition time t 3 1 in the continuous M acquisitions; available IR1(m 3 ), IR2(m 3 ) IR3(m 3 ) respectively represents the temperature values first collected by the first infrared sensor, the second infrared sensor, and the third infrared sensor in successive M acquisitions.
  • the difference between the temperature at which the storage space tends to stabilize after being placed in an abnormal temperature item and the temperature before the temperature abnormality item may be placed (IR1(m 3 )-IR1(n 3 -2)), and does not occur
  • the mutated infrared sensor 130 compares the temperature rise of the storage space 140 collected during this period, and if the difference between the two is greater than the third preset value, it is determined that an abnormal temperature item is placed in the abnormal storage space; If the difference is less than or equal to the third preset value, it is determined that the abnormal temperature item is not placed in the abnormal storage space.
  • the number of infrared sensors 130 is three, respectively a first infrared sensor, a second infrared sensor, and a third infrared sensor; each storage space 140 has a temperature of 5 ° C.
  • the first preset value be 0.6 ° C
  • the second preset value be 0.4 ° C
  • the third preset value be 1.5 ° C
  • the three infrared sensors 130 start collecting temperature values after the second second.
  • the first infrared sensor has a temperature value of 5.1 ° C
  • the second temperature is 5.2 ° C
  • the third temperature is 5.4 ° C
  • the fourth temperature is 5.6 ° C.
  • the temperature value collected in the fifth time is 5.9 ° C
  • the temperature value collected in the sixth time is 6.2 ° C
  • the temperature value collected in the seventh time is 6.9 ° C
  • the temperature value collected in the eighth time is 7.6 ° C
  • the temperature collected in the ninth time is 7.6 ° C
  • the value is 8.2 ° C
  • the temperature value collected in the 10th time is 8.8 ° C
  • the temperature value collected in the 11th time is 9.3 ° C
  • the temperature value collected in the 12th time is 9.6 ° C
  • the temperature value collected in the 13th time is 9.9 ° C.
  • the temperature value of the 14 acquisitions was 10.2 ° C
  • the temperature value of the 15th collection was 10.4 ° C, .
  • the temperature of the second infrared sensor is 5.2 °C for the first time, 5.3 °C for the second time, 5.5 °C for the third time, and 5.7 °C for the fourth time.
  • the temperature value of the second acquisition is 5.9 °C
  • the temperature value of the sixth acquisition is 6.2 °C
  • the temperature value of the seventh collection is 6.4 °C
  • the temperature value of the eighth collection is 6.6 °C
  • the temperature value of the ninth acquisition is At 6.8 °C
  • the temperature value collected in the 10th time is 7.1 °C
  • the temperature value collected in the 11th time is 7.3 °C
  • the temperature value collected in the 12th time is 7.6 °C
  • the temperature value collected in the 13th time is 7.9 °C
  • the 14th time The collected temperature value was 8.2 ° C
  • the temperature value collected for the 15th time was 8.4 ° C, .
  • the third infrared sensor is collected at a temperature of 5.1 ° C for the first time, the second temperature is 5.3 ° C, the third temperature is 5.4 ° C, and the fourth temperature is 5.6 ° C.
  • the temperature value of the secondary acquisition is 5.9 ° C, the first The temperature value of the six acquisitions was 6.1 ° C, the temperature value of the seventh collection was 6.4 ° C, the temperature value of the eighth collection was 6.6 ° C, the temperature value of the ninth acquisition was 6.9 ° C, and the temperature value of the tenth acquisition.
  • the temperature is 7.4 ° C for the 11th time, the temperature is 7.4 ° C for the 12th time, the temperature is 7.7 ° C for the 12th time, the temperature is 7.9 ° C for the 13th time, and the temperature is 8.1 ° C for the 14th time.
  • the temperature value of the secondary acquisition is 8.3 ° C, ....
  • the first infrared sensor has a case where the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value at the seventh acquisition (ie,
  • the storage space 140 corresponding to the first infrared sensor is an abnormal storage space, that is, a storage space 140 that may be placed in an abnormal temperature item.
  • the temperature value collected for the fifth time (7-2 times) was recorded as the first temperature value.
  • the first infrared sensor satisfies the case where the absolute value of the difference between the temperature values of the two adjacent acquisitions is smaller than the second preset value from the 12th acquisition (the difference between the temperature value collected in the 12th time and the temperature value collected in the 11th time)
  • the absolute value of the difference is less than 0.4 ° C, that is,
  • the absolute value of the difference between the temperature values satisfying the four consecutive acquisitions of the second time is less than the second preset value.
  • the second infrared sensor and the third infrared sensor do not show that the absolute value of the difference between the temperature values of the two adjacent acquisitions is greater than the first preset value. Therefore, the temperature values collected by the second infrared sensor and the third infrared sensor at the 5th and 12th times are recorded as the first normal temperature value and the second normal temperature value of the second infrared sensor and the third infrared sensor, respectively.

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Abstract

一种用于检测冰箱内是否放入温度异常物品的方法，其中冰箱包括：内部划分为多个储物空间（140）的箱体（110）、设置在箱体（110）前部的门体、以及分别对多个储物空间（140）的温度进行感测的多个红外传感器（130），并且该方法包括：在门体开启后，控制多个红外传感器（130）采集温度值；判断多个储物空间（140）中是否存在可能放入温度异常物品的异常储物空间；若判断存在异常储物空间，则获取异常储物空间在可能放入温度异常物品前后的第一温度变化值和其在可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的第二温度变化值；以及根据第一温度变化值和第二温度变化值判断异常储物空间内是否放入温度异常物品。该方法能较为准确地判断某一储物空间（140）内是否放入过热食物。

Description

用于检测冰箱内是否放入温度异常物品的方法
本申请要求了申请日为2016年11月23日，申请号为201611047449.9，发明名称为“用于检测冰箱内是否放入温度异常物品的方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及冷藏冷冻设备，特别是涉及一种用于检测冰箱内是否放入温度异常物品的方法。
背景技术
传统冰箱通常利用布置于储物间室内部的温度传感器感测其布置位置周围的温度，将该温度作为制冷控制的依据。使用这种控制方式进行冰箱控制时，在温度传感器测量的温度高于预设值时，冰箱启动制冷。然而，在储物间室被搁物隔板分隔为多个相对独立的储物空间的情况下，如果用户把温度较高的热食物放进冰箱某一储物空间，一方面，热食物的放入会影响其所在储物空间的温度，从而会使原本存在于冰箱内部食物中的各种细菌得以较快的滋生，不利于食物健康安全的保存；另一方面，如果对储物间室整体进行无差别的制冷，则会造成电能浪费，同时会导致放入热食物的储物空间降温缓慢。
此外，在冰箱开门时，放入温度较高的热食物会引起储物空间温度变化，而未放入热食物的储物空间也会由于外部环境与储物间室之间自然对流导致的热交换引起温度变化，但是现有技术中始终没有适当的判别方法来区分上述两种情况，导致现有技术中冰箱的制冷控制不够准确。不过多地增加冰箱硬件成本，提供一种能够较为准确地区分上述两种情况的判别方法是冰箱技术领域一直渴望解决但始终未能解决的技术问题。
发明内容
鉴于上述问题，提出了本发明以便克服上述问题或者至少部分地解决上述问题。
本发明一个进一步的目的是要提供一种检测冰箱内是否放入温度异常物品的方法，以检测冰箱在开门期间是否放入过热食物。
本发明另一个进一步的目的是要提高冰箱的制冷控制的准确性。
特别地，本发明提供了一种用于检测冰箱内是否放入温度异常物品的方法，其中所述冰箱包括：内部划分为多个储物空间的箱体、设置在所述箱体前部的门体、以及分别对所述多个储物空间的温度进行感测的多个红外传感器，并且所述方法包括：
在所述门体开启后，控制所述多个红外传感器采集温度值；
判断所述多个储物空间中是否存在可能放入温度异常物品的异常储物空间；
若判断存在所述异常储物空间，则获取所述异常储物空间在可能放入温度异常物品前后的第一温度变化值和其在可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的第二温度变化值；以及
根据所述第一温度变化值和所述第二温度变化值判断所述异常储物空间内是否放入温度异常物品。
可选地，其中判断所述多个储物空间中是否存在所述异常储物空间，包括：
在所述门体开启期间，若所述多个红外传感器中的任一红外传感器出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况，则判断所述多个储物空间中存在所述异常储物空间，且每个出现相邻两次采集的温度值的差的绝对值大于第一预设值的红外传感器对应的储物空间均为所述异常储物空间；
在所述门体开启期间，若每个所述红外传感器相邻两次采集的温度值的差的绝对值均小于等于所述第一预设值，则判断所述多个储物空间中不存在所述异常储物空间。
可选地，其中获取所述第一温度变化值的步骤包括：
记录所述异常储物空间对应的红外传感器在出现相邻两次采集的温度值的差的绝对值大于所述第一预设值之前最近E次采集的第一温度值，作为所述异常储物空间在可能放入温度异常物品前的温度值，其中E≥3；
当所述异常储物空间对应的红外传感器在出现相邻两次采集的温度值的差的绝对值大于所述第一预设值之后、出现连续M次采集的温度值均满足相邻两次采集的温度值的差的绝对值小于第二预设值时，记录所述异常储物空间对应的红外传感器在所述连续M次采集中任意一次采集的第二温度值，作为所述异常储物空间在可能放入温度异常物品后的温度值，其中M≥3且所述第二预设值小于等于所述第一预设值；
计算所述第二温度值与所述第一温度值的差值，并作为所述第一温度变化值。
可选地，记录所述异常储物空间对应的红外传感器在所述连续M次采集中第一次或最后一次采集的温度值，作为所述异常储物空间在可能放入温度异常物品前的温度值。
可选地，其中获取所述第二温度变化值的步骤包括：
确定其余红外传感器中在所述异常储物空间对应的红外传感器出现相邻两次采集的温度值的差的绝对值大于所述第一预设值时起至出现所述连续M次相邻两次采集的温度值的差的绝对值小于所述第二预设值时，未出现相邻两次采集的温度值的差的绝对值大于所述第一预设值的正常红外传感器；且
记录所述正常红外传感器在所述异常储物空间对应的红外传感器采集第一温度值和第 二温度值时采集的第一正常温度值和第二正常温度值，计算所述第二正常温度值与所述第一正常温度值的差值，并作为所述第二温度变化值。
可选地，当确定所述正常红外传感器的数量为两个以上时，所述第二温度变化值等于所有所述正常红外传感器采集的第二正常温度值与第一正常温度值之差的平均值。
可选地，其中根据所述第一温度变化值和所述第二温度变化值判断所述异常储物空间内是否放入温度异常物品的步骤包括：
判断所述第一温度变化值与所述第二温度变化值的差值是否大于第三预设值，
若是，则判断所述异常储物空间内放入温度异常物品；
若否，则判断所述异常储物空间内未放入温度异常物品；
其中所述第三预设值大于等于所述第一预设值。
可选地，其中所述红外传感器的数量为三个以上。
可选地，其中控制所述多个红外传感器采集温度值是在所述门体开启一预设时间后进行的。
可选地，所述方法还包括：
若判断所述异常储物空间内放入温度异常物品，则发出视觉和/或听觉信号提醒用户；和/或
若判断不存在所述异常储物空间，则判断在所述门体开启期间所述多个储物空间均未放入温度异常物品。
本发明用于检测冰箱内是否放入温度异常物品的方法，先判断多个储物空间中是否存在可能放入温度异常物品的异常储物空间，并进一步通过异常储物空间在可能放入温度异常物品前后的第一温度变化值和其在可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的第二温度变化值，判断异常储物空间内是否放入温度异常物品。本发明的判断异常储物空间内是否放入温度异常物品的原理主要利用冰箱门开启期间放入热食物和室内外热交换引起储物空间的温度变化、与单纯由于冰箱门开启期储物空间内外热交换导致的温度自然变化作比较，以判断某一储物空间内是否放入过热食物。
目前，现有冰箱中尚未存在检测冰箱内是否放入温度异常物品的方法。对于普通用户而言，可能尚未意识到在冰箱内放入过热食物(如温度大于40℃上的食物)会对冰箱造成何种不利影响，有时也可能没有在意放入冰箱内的食物温度是否过高。针对这些问题，本发明的方法可较为准确地判断某一储物空间内是否放入过热食物，并可在判断储物空间内放入过热食物时对用户发出提醒，以便于用户在温度异常物品的温度趋于正常后再将其放入冰箱贮 藏。在一定程度上避免或减少由于冰箱内放入过热物品对冰箱及其内的储物造成不利影响。
进一步地，本发明可较为准确地区分储物空间在开门期间温度升高的原因是因为放入温度较高的食物或是仅由于外部环境与储物空间之间自然对流导致的热交换，从而有利于冰箱针对具体情况进行较为合理适当的制冷控制。
根据下文结合附图对本发明具体实施例的详细描述，本领域技术人员将会更加明了本发明的上述以及其他目的、优点和特征。
附图说明
后文将参照附图以示例性而非限制性的方式详细描述本发明的一些具体实施例。附图中相同的附图标记标示了相同或类似的部件或部分。本领域技术人员应该理解，这些附图未必是按比例绘制的。附图中：
图1是根据本发明一个实施例的冰箱的示意性结构图；
图2是根据本发明一个实施例的用于检测冰箱内是否放入温度异常物品的方法的示意图；
图3是根据本发明一个实施例的判断冰箱中是否存在异常储物空间的方法的示意图；
图4是根据本发明一个实施例的获取第一温度变化值的方法的示意图；
图5是根据本发明一个实施例的获取第二温度变化值的方法的示意图；
图6是根据本发明一个实施例的判断异常储物空间内是否放入温度异常食物的方法的示意图；
图7是根据本发明一个实施例的用于检测冰箱内是否放入温度异常物品的详细流程图。
具体实施方式
图1是根据本发明一个实施例的冰箱的示意性结构图。参见图1，该冰箱一般性地可以包括：箱体110和多个红外传感器130。箱体110可由顶壁、底壁、后壁以及左右两个侧壁围成，箱体110前方设置门体(图中未示出)，门体可以采用枢轴结构连接于侧壁上。箱体110内部限定有储物间室(例如冷藏室)。储物间室可被分隔为多个储物空间140。例如利用搁物架组件120将储物间室分隔为多个储物空间140。其中一种优选结构为：搁物架组件120包括至少一个水平设置的隔板，以将储物间室沿竖直方向分隔为多个储物空间140。在图1中，搁物架组件120包括第一隔板、第二隔板、第三隔板，其中第一隔板上方形成第一储物空间、第一隔板与第二隔板之间形成第二储物空间、第二隔板与第三隔板之间形成第三储物空间。在本发明的另一些实施例中，搁物架组件120中的隔板数量以及储物空间140 的数量，可以根据冰箱的容积以及使用要求预先进行配置。
多个红外传感器130，设置于储物间室内部，其分别用于测量各储物空间140的温度。红外传感器130的数量依据储物空间140的数量进行设定，每个储物空间140可以设置一个红外传感器130。
为了提高红外传感器130对储物空间140内部物品的温度感测精度，满足对储物空间140进行制冷的要求，发明人对红外传感器130的安装位置进行了大量的测试，并得出红外传感器130的优选安装位置及其优选的配置方式。红外传感器130在其所在储物空间140的高度高于储物空间140整体高度的二分之一处(更优的范围为高于或位于储物空间140整体高度的三分之二)，红外传感器130的红外接收中心线相对于竖直向上的角度范围设置为70度至150度(更优的范围为76度至140度)；以及红外传感器130的红外接收中心线的水平投影与其所在侧壁的夹角范围设置为30度至60度(更优的范围为30度至45度)。
红外传感器130不发射红外线，而是被动接收所感测范围内物品发射的红外线及背景红外线，直接感知储物空间140内物品温度的变化区域及温度，转换为相应的电信号。
在本发明实施例的冰箱中，可以对每个红外传感器130的相邻两次的测量结果进行计算，以得到每个储物空间140的温升情况，进而根据储物空间140的温升情况来判断某个储物空间140是否放入温度异常物品。本领域技术人员可以理解，此处的温度异常物品即为温度过高或过低的物品。
在本发明的一些实施例中，冰箱设置3个以上的储物空间140，相应地，冰箱设置3个以上的红外传感器130。由于同时最多在冰箱的两个储物空间140中放入温度异常物品，这样，即使两个储物空间140同时放置温度异常物品，仍有其他储物空间140未同时放置温度异常物品。
图2是根据本发明一个实施例的用于检测冰箱内是否放入温度异常物品的方法的示意图。该用于检测冰箱内是否放入温度异常物品的方法一般性地可以包括：
步骤S102，在门体开启后，控制多个红外传感器130采集温度值。
步骤S104，根据每个红外传感器130在门体开启期间相邻两次采集的温度值，判断多个储物空间140中是否存在可能放入温度异常物品的异常储物空间。
步骤S106，若判断存在异常储物空间，则获取异常储物空间在可能放入温度异常物品前后的第一温度变化值和其在可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的第二温度变化值。
步骤S108，根据第一温度变化值和第二温度变化值判断异常储物空间内是否放入温 度异常物品。
在步骤S102中，可利用冰箱的开门检测装置检测门体的开闭状态。开门检测装置可以利用扇形开关、磁敏开关、霍尔开关等多种方式进行检测，在门体完全闭合或者打开时分别产生不同的电信号，以指示门体的状态。可在门体开启一预设时间后，控制多个红外传感器130采集温度值。该预设时间例如可为2至3秒。相比在门体刚开启就使红外传感器130采集温度值，延迟一预设时间可以避免由于气流扰动导致红外传感器130采集的温度值发生突变。
红外传感器130可以每间隔0.1ms(该数值可以灵活调整)进行一次采集。多个红外传感器130可以同时进行采集。
步骤S104判断多个储物空间140中是否存在可能放入温度异常物品的异常储物空间的流程包括多种，其中一种优选的方式可参见图3中示出的步骤S1041至步骤S1043。
步骤S1041，判断在开门期间是否有任一红外传感器130出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况；若是，则执行步骤S1042；若否，则执行步骤S1043。
步骤S1042，判断多个储物空间140中存在异常储物空间，且每个出现相邻两次采集的温度值的差的绝对值大于第一预设值的红外传感器130对应的储物空间140均为异常储物空间。
步骤S1043，判断多个储物空间140中不存在异常储物空间。
也就是说，步骤S104的流程优选包括：在门体开启期间，若前述多个红外传感器130中的任一红外传感器130出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况(即任一红外传感器130采集的温度值发生突变)，则判断前述多个储物空间140中存在异常储物空间，且每个出现相邻两次采集的温度值的差的绝对值大于第一预设值的红外传感器130对应的储物空间140均为异常储物空间；在门体开启期间，若每个红外传感器130相邻两次采集的温度值的差的绝对值均小于等于第一预设值，则判断前述多个储物空间140中不存在异常储物空间。
在步骤S1041中，第一预设值的大小可根据实验获得。对于特定的冰箱而言，储物空间140在开门期间由于外部环境与其之间进行热交换引起的红外传感器130相邻两次检测的温度值的差值(该差值可记为第一差值)可以通过对该冰箱进行大量测试得出。本领域技术人员均可意识到的，储物空间140在开门期间由于放入温度异常物品以及外部环境与其进行热交换引起的红外传感器130相邻两次检测的温度值的差值(该差值可记为第二差值)应该大于上述第一差值。例如，冰箱的某个储物空间140在开门期间放入温度为60℃(或50℃ 等)的物品时红外传感器130相邻两次检测的温度值的差值的大小，可作为第一预设值的参考值。第一预设值例如可设置为0.6℃或0.7℃等。
在替代性实施例中，步骤S104的一种可选流程为：将多个红外传感器130在同一采集次数或者说相同采集时刻采集的温度进行比较，温度明显高于其他红外传感器130的红外传感器130对应的储物空间140为异常储物空间。在另一些替代性实施例中，步骤S104的一种可选流程为：由用户手动输入多个储物空间140中是否存在异常储物空间、以及哪个储物空间140为异常储物空间。
在一些实施例中，在步骤S104中，若判断不存在异常储物空间，则判断在门体开启期间前述多个储物空间140均未放入温度异常物品。也就是说，在开门期间，如果全部红外传感器130均未出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况，则判断不存在异常储物空间，并进一步判断在门体开启期间前述多个储物空间140均未放入温度异常物品。
在步骤S106中，获取第一温度变化值的流程包括多种，其中一种优选的方式可参见图4中示出的步骤S1061至步骤S1064。
步骤S1061，记录异常储物空间对应的红外传感器130在出现相邻两次采集的温度值的差的绝对值大于第一预设值之前最近E次采集的第一温度值，作为异常储物空间在可能放入温度异常物品前的温度值，其中E≥3。
步骤S1062，判断异常储物空间对应的红外传感器130在出现相邻两次采集的温度值的差的绝对值大于第一预设值之后、是否出现连续M次采集的温度值均满足相邻两次采集的温度值的差的绝对值小于第二预设值的情况，若是，则执行步骤S1063。
步骤S1063，记录异常储物空间对应的红外传感器130在连续M次采集中任意一次采集的第二温度值，作为异常储物空间在可能放入温度异常物品后的温度值。
步骤S1064，计算第二温度值与第一温度值的差值，并作为第一温度变化值。
在步骤S1063中，M≥3且第二预设值小于等于第一预设值。第二预设值的大小可根据实验获得。对于冰箱而言，将温度异常物品放入某一储物空间140后，该异常储物空间内的温度先会以较快地速率升温，之后趋于稳定。当该异常储物空间内的温度趋于稳定后，其对应的红外传感器130在连续M次采集中任意一次采集的温度值均满足相邻两次采集的温度值的差的绝对值小于第二预设值。此时，在连续M次采集中任意一次采集的温度值均可作为该异常储物空间放入温度异常物品后的温度。第二预设值例如可设置为0.5℃或0.4℃等。
在优选的实施例中，第二温度值为异常储物空间对应的红外传感器130在连续M次 采集中第一次或最后一次采集的温度值。因此，在步骤S1063中，记录异常储物空间对应的红外传感器130在连续M次采集中第一次或最后一次采集的温度值，作为异常储物空间在可能放入温度异常物品前的温度值。
在步骤S106中，获取第二温度变化值的流程包括多种，其中一种优选的方式可参见图5中示出的步骤S1065至步骤S1067。
步骤S1065，确定其余红外传感器130中在异常储物空间对应的红外传感器130出现相邻两次采集的温度值的差的绝对值大于第一预设值时起至出现连续M次相邻两次采集的温度值的差的绝对值小于第二预设值时，未出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况的正常红外传感器。也就是说，在异常储物空间可能放入温度异常物品的前后期间，确定其他储物空间140对应的红外传感器130的采集温度是否发生突变，未发生突变的红外传感器130记为正常红外传感器。
在优选的实施例中，红外传感器130的个数大于等于3个，这样，即使有两个储物空间140同时放入温度异常物品导致相应的两个红外传感器130采集的温度值发生突变，那么在异常储物空间可能放入温度异常物品的前后期间，也会存在未发生突变的红外传感器130。
步骤S1066，记录正常红外传感器(即在异常储物空间对应的红外传感器130出现相邻两次采集的温度值的差的绝对值大于第一预设值时起至出现连续M次相邻两次采集的温度值的差的绝对值小于第二预设值时，未出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况的红外传感器130)在异常储物空间对应的红外传感器130采集第一温度值和第二温度值时采集的第一正常温度值和第二正常温度值。
步骤S1067，计算第二正常温度值与第一正常温度值的差值，并作为第二温度变化值。
在上述步骤S1065至步骤S1067中，当确定正常红外传感器的数量为一个时，第二温度变化值等于每个正常红外传感器采集的第二结束温度值与第一正常温度值之差。当确定正常红外传感器的数量为两个以上时，第二温度变化值可等于任一个正常红外传感器采集的第二正常温度值与第一正常温度值之差，优选等于所有正常红外传感器采集的第二正常温度值与第一正常温度值之差的平均值。在步骤S1065至步骤S1067中，将其他储物空间140在异常储物空间可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的温升近似为异常储物空间在此期间由于外部环境与其之间进行热交换导致的温升。
在替代性实施例中，也可通过实验获取特定冰箱在不同环境温度和不同冰箱内部温度的情况下、冰箱开门后到关门之前红外传感器130测得的温度变化曲线，进而确定异常储物空间在可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的温升。
步骤S108根据第一温度变化值和第二温度变化值判断异常储物空间内是否放入温度异常物品的流程包括多种，其中一种优选的方式可参见图6中示出的步骤S1081至步骤S1083。
步骤S1081，判断第一温度变化值与第二温度变化值的差值是否大于第三预设值，若是，则执行步骤S1082；若否，则执行步骤S1083。
步骤S1082，判断异常储物空间内放入温度异常物品。
步骤S1083，判断异常储物空间内未放入温度异常物品。
在步骤S1081中，第三预设值可大于等于第一预设值。第三预设值的大小与冰箱认定的温度异常物品的最低温度相关。例如，如果冰箱认为温度高于40℃的物品即为温度异常物品，则可在某一储物空间140中放入40℃的物品，通过实验来确定第三预设值的大小。
在步骤S1082之后，可发出视觉和/或听觉信号提醒用户其在对应储物空间140中放入的物品温度异常。例如可以通过冰箱中内置的发音装置发出特定的音乐或铃声或语音提示，和/或通过冰箱门体上设置的显示装置发出文字提醒，和/或通过点亮或闪烁指示灯等方式提醒用户。
在步骤S1082或步骤S1083之后，多个红外传感器130可继续采集温度值，重新执行步骤S104至步骤S108。
此外，在一些实施例中，如果在异常储物空间可能放入温度异常物品的前后期间，其他某一储物空间140对应的红外传感器130的采集温度也发生突变，则可在判断该异常储物空间内是否放入温度异常食物之后，再判断另一发生突变的红外传感器130对应的储物空间140是否放入温度异常食物。判断另一发生突变的红外传感器130对应的储物空间140是否放入温度异常食物的方法可参见步骤S106至步骤S108。
图7是根据本发明一个实施例的用于检测冰箱内是否放入温度异常物品的详细流程图。其中红外传感器130的数量为三个。
步骤S201，判断门体是否开启，若是，执行步骤S202。
步骤S202，延迟N秒后，3个红外传感器130采集温度值IR(1)。N为2～3秒。
步骤S204，3个红外传感器130继续采集温度值IR(2)。
步骤S206，3个红外传感器130继续采集温度值IR(n)。
步骤S208，判断任一红外传感器130当前采集的温度值IR(n)与上次采集的温度值IR(n-1)之差的绝对值是否大于第一预设值A；若是，认定为该红外传感器130采集的温度值发生了突变，执行步骤S210；若否，认定为三个红外传感器130采集的温度值均未发生突 变，执行步骤S209。在本发明中，若认定某个红外传感器130采集的温度值发生了突变，则意味着该红外传感器130对应的储物空间140很可能放入了温度异常物品，导致该储物空间140的温度发生了突变。
步骤S209，判断门体是否开启，若是，返回步骤S206；若否，执行步骤S211。
步骤S211，判断每个储物空间140均未放入温度异常物品。
步骤S210，记录3个红外传感器130第n-2次采集的温度值IR(n-2)和采集时刻t0。在步骤S208中被认定为采集的温度值发生突变的红外传感器130被记为第一红外传感器，其他两个红外传感器130被记为第二红外传感器和第三红外传感器，则记录3个红外传感器130在第一红外传感器采集的温度值发生突变时前两次采集的温度值IR(n-2)。可用IR1(n-2)、IR2(n-2)、IR3(n-2)分别表示第一红外传感器、第二红外传感器、第三红外传感器第n-2次采集的温度值。
步骤S212，3个红外传感器130继续采集温度值IR(n+1)。
步骤S214，判断出现采集值IR(n)与采集值IR(n-1)之差的绝对值大于第一预设值A的情况的该红外传感器130(即第一红外传感器)是否出现连续M次采集的温度值均满足相邻两次的差的绝对值小于第二预设值B，若是，执行步骤S216。
步骤S216，记录3个红外传感器130在连续M次采集中第一次的采集值IR(m)以及连续M次采集中最后一次采集的时刻t1；可用IR1(m)、IR2(m)、IR3(m)分别表示第一红外传感器、第二红外传感器、第三红外传感器在前述连续M次采集中第一次采集的温度值。
步骤S218，判断其他两个红外传感器130在t0～t1期间是否均未出现相邻两次的采集值的差的绝对值大于第一预设值A，也就是判断第二红外传感器和第三红外传感器在t0～t1期间采集的温度值是否均未发生突变。若是，即认定为第二红外传感器和第三红外传感器在t0～t1期间采集的温度值均未发生突变，执行步骤S220；若否，即认定为第二红外传感器和第三红外传感器中有一个在t0～t1期间采集的温度值发生突变，执行步骤S219。本领域技术人员可意识到的，在本发明中，默认一次仅可能同时在两个储物空间140中放入温度异常物品，即，在一个放入温度异常物品的储物空间140内的温度趋于平稳之前，仅可能再有一个储物空间140放入温度异常物品，这就意味着三个红外传感器130中至少有一个红外传感器130在t0～t1期间采集的温度值未发生突变。
步骤S219，假设在t0～t1期间采集的温度值未发生突变的红外传感器130为第二红外传感器。判断IR1(m)-IR1(n-2)-(IR2(m)-IR2(n-2))是否大于第三预设值C，若是，则执行步骤S222；若否，则执行步骤S224。在步骤S219中，利用第一红外传感器采集的异常储物空间 在可能放入温度异常物品之后趋于稳定时的温度与在可能放入温度异常物品之前的温度的差值，与第二红外传感器在此期间(即异常储物空间在可能放入温度异常物品之前至可能放入温度异常物品之后趋于稳定期间)采集的储物空间140的温升进行比较，如果两者的差值大于第三预设值，则执行步骤S222，认定异常储物空间内放入温度异常物品；如果两者的差值小于等于第三预设值，则执行步骤S224，认定异常储物空间内并未放入温度异常物品。
步骤S220，判断IR1(m)-IR1(n-2)-(IR2(m)-IR2(n-2)+IR3(m)-IR3(n-2))/2是否大于第三预设值C，若是，则执行步骤S222；若否，则执行步骤S224。在步骤S220中，在第二红外传感器和第三红外传感器在t0～t1期间采集的温度值均未发生突变的情况下，利用第一红外传感器采集的异常储物空间在可能放入温度异常物品之后趋于稳定时的温度与在可能放入温度异常物品之前的温度的差值，与第二红外传感器和第三红外传感器在此期间(即异常储物空间在可能放入温度异常物品之前至可能放入温度异常物品之后趋于稳定期间)采集另外两个储物空间140的平均温升比较，如果两者的差值大于第三预设值，则执行步骤S222，认定异常储物空间内放入温度异常物品；如果两者的差值小于等于第三预设值，则执行步骤S224，认定异常储物空间内并未放入温度异常物品。
步骤S222，判断出现采集值IR(n)与采集值IR(n-1)之差的绝对值大于第一预设值A的该红外传感器130(即第一红外传感器)对应的储物空间140放入温度异常物品。
步骤S224，判断出现采集值IR(n)与采集值IR(n-1)之差的绝对值大于第一预设值A的该红外传感器130(即第一红外传感器)对应的储物空间140未放入温度异常物品。
在步骤S222和步骤S224之后，可返回执行步骤S201。
在一些实施例中，在步骤S222之后，可发出提醒，例如点亮对应该异常储物空间的指示灯，以提醒用户在该储物空间140内放入温度异常物品。
在另一些实施例中，可将步骤S220的判断结果发送至冰箱的主控板，参与冰箱制冷系统的控制。例如，当判断结果为某一储物空间140内放入温度异常物品，则使制冷系统向该储物空间140提供更多的冷量，以使其温度尽快降低至预设保存温度。利用采用本实施例的检测冰箱内是否放入温度异常物品的方法，可以及时有效地进行制冷控制，避免高温物体对周围储物空间140的影响，提高冰箱冷藏室的储藏效果，减少食物的营养流失，同时避免了对整个储物间室无区别制冷导致的电能浪费。
此外，在一些实施例中，在步骤S218中判断第三红外传感器采集的温度值发生突变后，可进一步判断第三红外传感器对应的储物空间140内是否放入温度异常物品。具体流程可参考步骤S210至步骤S222或步骤S224。
具体地，可在步骤S218之后记录第三红外传感器发生突变的采集次数n3，以及三个红外传感器在n3-2次采集的温度值IR1(n3-2)、IR2(n3-2)、IR3(n3-2)和采集时刻t30，并在第三红外传感器出现连续M次采集的温度值均满足相邻两次的差的绝对值小于第二预设值B时，记录3个红外传感器130在连续M次采集中第一次的采集值IR(m3)以及连续M次采集中最后一次采集的时刻t31；可用IR1(m3)、IR2(m3)、IR3(m3)分别表示第一红外传感器、第二红外传感器、第三红外传感器在连续M次采集中第一次采集的温度值。之后，判断其他两个红外传感器130在t30～t31期间是否均未出现相邻两次的采集值的差的绝对值大于第一预设值A，利用第三红外传感器采集的异常储物空间在可能放入温度异常物品之后趋于稳定时的温度与在可能放入温度异常物品之前的温度的差值(IR1(m3)-IR1(n3-2))，与未发生突变的红外传感器130在此期间采集的储物空间140的温升进行比较，如果两者的差值大于第三预设值，则认定异常储物空间内放入温度异常物品；如果两者的差值小于等于第三预设值，则认定异常储物空间内并未放入温度异常物品。
在一个说明性的具体实施例中，红外传感器130的数量为3个，分别为第一红外传感器、第二红外传感器、第三红外传感器；各储物空间140的温度均为5℃。令上述第一预设值为0.6℃，第二预设值为0.4℃，第三预设值为1.5℃，E＝2，M＝4。
开门后，第2秒后3个红外传感器130开始采集温度值。其中，第一红外传感器第1次采集的温度值为5.1℃、第2次采集的温度值为5.2℃、第3次采集的温度值为5.4℃、第4次采集的温度值为5.6℃、第5次采集的温度值为5.9℃、第6次采集的温度值为6.2℃、第7次采集的温度值为6.9℃、第8次采集的温度值为7.6℃、第9次采集的温度值为8.2℃、第10次采集的温度值为8.8℃、第11次采集的温度值为9.3℃、第12次采集的温度值为9.6℃、第13次采集的温度值为9.9℃、第14次采集的温度值为10.2℃、第15次采集的温度值为10.4℃、……。
第二红外传感器第1次采集的温度值为5.2℃、第2次采集的温度值为5.3℃、第3次采集的温度值为5.5℃、第4次采集的温度值为5.7℃、第5次采集的温度值为5.9℃、第6次采集的温度值为6.2℃、第7次采集的温度值为6.4℃、第8次采集的温度值为6.6℃、第9次采集的温度值为6.8℃、第10次采集的温度值为7.1℃、第11次采集的温度值为7.3℃、第12次采集的温度值为7.6℃、第13次采集的温度值为7.9℃、第14次采集的温度值为8.2℃、第15次采集的温度值为8.4℃、……。
第三红外传感器第1次采集的温度值为5.1℃、第2次采集的温度值为5.3℃、第3次采集的温度值为5.4℃、第4次采集的温度值为5.6℃、第5次采集的温度值为5.9℃、第 6次采集的温度值为6.1℃、第7次采集的温度值为6.4℃、第8次采集的温度值为6.6℃、第9次采集的温度值为6.9℃、第10次采集的温度值为7.1℃、第11次采集的温度值为7.4℃、第12次采集的温度值为7.7℃、第13次采集的温度值为7.9℃、第14次采集的温度值为8.1℃、第15次采集的温度值为8.3℃、……。
根据上述采集结果，可知第一红外传感器在第7次采集时出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况(即|6.9℃-6.2℃|>0.6℃)，第一红外传感器对应的储物空间140即为异常储物空间，即可能会放入温度异常物品的储物空间140。记录第5次(7-2次)采集的温度值作为第一温度值。第一红外传感器从第12次采集开始满足相邻两次采集的温度值的差的绝对值小于第二预设值的情况(第12次采集的温度值与第11次采集的温度值的差的绝对值小于0.4℃，即|9.6℃-9.3℃|<0.4℃)，且至第15次采集满足连续4次相邻两次采集的温度值的差的绝对值小于第二预设值的情况，则记录该第一红外传感器在连续4次采集中第一次采集(即第12次采集)的温度值作为第二温度值。相应地，第一温度变化值＝第二温度值-第一温度值＝9.6℃-5.9℃＝3.7℃。
第二红外传感器和第三红外传感器在第7次采集至第15次采集期间，均未出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况。故记录第二红外传感器和第三红外传感器在第5次和第12次采集的温度值，分别作为第二红外传感器和第三红外传感器的第一正常温度值和第二正常温度值。
相应地，第二温度变化值＝((7.6℃-5.9℃)+(7.7℃-5.9℃))/2＝1.75℃。第一温度变化值与第二温度变化值的差值＝3.7℃-1.75℃＝1.95℃，大于第三预设值1.5℃，因此判断异常储物空间内放入温度异常物品。
至此，本领域技术人员应认识到，虽然本文已详尽示出和描述了本发明的多个示例性实施例，但是，在不脱离本发明精神和范围的情况下，仍可根据本发明公开的内容直接确定或推导出符合本发明原理的许多其他变型或修改。因此，本发明的范围应被理解和认定为覆盖了所有这些其他变型或修改。

Claims (10)

  1. 一种用于检测冰箱内是否放入温度异常物品的方法，其中所述冰箱包括：内部划分为多个储物空间的箱体、设置在所述箱体前部的门体、以及分别对所述多个储物空间的温度进行感测的多个红外传感器，并且所述方法包括：
    在所述门体开启后，控制所述多个红外传感器采集温度值；
    判断所述多个储物空间中是否存在可能放入温度异常物品的异常储物空间；
    若判断存在所述异常储物空间，则获取所述异常储物空间在可能放入温度异常物品前后的第一温度变化值和其在可能放入温度异常物品前后由于外部环境与其之间进行热交换导致的第二温度变化值；以及
    根据所述第一温度变化值和所述第二温度变化值判断所述异常储物空间内是否放入温度异常物品。
  2. 根据权利要求1所述的方法，其中判断所述多个储物空间中是否存在所述异常储物空间，包括：
    在所述门体开启期间，若所述多个红外传感器中的任一红外传感器出现相邻两次采集的温度值的差的绝对值大于第一预设值的情况，则判断所述多个储物空间中存在所述异常储物空间，且每个出现相邻两次采集的温度值的差的绝对值大于第一预设值的红外传感器对应的储物空间均为所述异常储物空间；
    在所述门体开启期间，若每个所述红外传感器相邻两次采集的温度值的差的绝对值均小于等于所述第一预设值，则判断所述多个储物空间中不存在所述异常储物空间。
  3. 根据权利要求2所述的方法，其中获取所述第一温度变化值的步骤包括：
    记录所述异常储物空间对应的红外传感器在出现相邻两次采集的温度值的差的绝对值大于所述第一预设值之前最近E次采集的第一温度值，作为所述异常储物空间在可能放入温度异常物品前的温度值，其中E≥3；
    当所述异常储物空间对应的红外传感器在出现相邻两次采集的温度值的差的绝对值大于所述第一预设值之后、出现连续M次采集的温度值均满足相邻两次采集的温度值的差的绝对值小于第二预设值时，记录所述异常储物空间对应的红外传感器在所述连续M次采集中任意一次采集的第二温度值，作为所述异常储物空间在可能放入温度异常物品后的温度值，其中M≥3且所述第二预设值小于等于所述第一预设值；
    计算所述第二温度值与所述第一温度值的差值，并作为所述第一温度变化值。
  4. 根据权利要求3所述的方法，其中
    记录所述异常储物空间对应的红外传感器在所述连续M次采集中第一次或最后一次采集的温度值，作为所述异常储物空间在可能放入温度异常物品前的温度值。
  5. 根据权利要求3所述的方法，其中获取所述第二温度变化值的步骤包括：
    确定其余红外传感器中在所述异常储物空间对应的红外传感器出现相邻两次采集的温度值的差的绝对值大于所述第一预设值时起至出现所述连续M次相邻两次采集的温度值的差的绝对值小于所述第二预设值时，未出现相邻两次采集的温度值的差的绝对值大于所述第一预设值的正常红外传感器；且
    记录所述正常红外传感器在所述异常储物空间对应的红外传感器采集第一温度值和第二温度值时采集的第一正常温度值和第二正常温度值，计算所述第二正常温度值与所述第一正常温度值的差值，并作为所述第二温度变化值。
  6. 根据权利要求5所述的方法，其中
    当确定所述正常红外传感器的数量为两个以上时，所述第二温度变化值等于所有所述正常红外传感器采集的第二正常温度值与第一正常温度值之差的平均值。
  7. 根据权利要求1所述的方法，其中根据所述第一温度变化值和所述第二温度变化值判断所述异常储物空间内是否放入温度异常物品的步骤包括：
    判断所述第一温度变化值与所述第二温度变化值的差值是否大于第三预设值，
    若是，则判断所述异常储物空间内放入温度异常物品；
    若否，则判断所述异常储物空间内未放入温度异常物品；
    其中所述第三预设值大于等于所述第一预设值。
  8. 根据权利要求1所述的方法，其中所述红外传感器的数量为三个以上。
  9. 根据权利要求1所述的方法，其中控制所述多个红外传感器采集温度值是在所述门体开启一预设时间后进行的。
  10. 根据权利要求1所述的方法，还包括：
    若判断所述异常储物空间内放入温度异常物品，则发出视觉和/或听觉信号提醒用户；和/或
    若判断不存在所述异常储物空间，则判断在所述门体开启期间所述多个储物空间均未放入温度异常物品。
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