WO2019085727A1 - 冰箱内食品冻结判断方法、冰箱食品保鲜方法及保鲜冰箱 - Google Patents

冰箱内食品冻结判断方法、冰箱食品保鲜方法及保鲜冰箱 Download PDF

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WO2019085727A1
WO2019085727A1 PCT/CN2018/110110 CN2018110110W WO2019085727A1 WO 2019085727 A1 WO2019085727 A1 WO 2019085727A1 CN 2018110110 W CN2018110110 W CN 2018110110W WO 2019085727 A1 WO2019085727 A1 WO 2019085727A1
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Prior art keywords
food
temperature
refrigerator
enter
ice crystal
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PCT/CN2018/110110
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English (en)
French (fr)
Inventor
龚勤勤
史慧新
伍志刚
宁志芳
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合肥华凌股份有限公司
合肥美的电冰箱有限公司
美的集团股份有限公司
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Publication of WO2019085727A1 publication Critical patent/WO2019085727A1/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
    • 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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/005—Mounting of control 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
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

Definitions

  • the embodiments of the present invention relate to the technical field of refrigerators, and particularly to a food freezing determination method in a refrigerator, a refrigerator food preservation method, and a fresh-keeping refrigerator.
  • the temperature of the refrigerator compartment is generally set manually by the user, and the user puts it into different compartments according to the food storage requirement, and the food which is eaten in a short period of time and cannot be frozen needs to be put into the refrigerating compartment, and the meat needs to be compared.
  • Food stored for a long time and frozen can be placed in the freezer.
  • the prior art cannot effectively control the freezing process of food, and brings the most direct problems: high temperature storage is prone to spoilage, low temperature storage will freeze, food taste and nutrition are obviously lost after freezing, and it is difficult to thaw.
  • the embodiment of the present application is intended to address at least one of the technical problems existing in the related art or related art.
  • One of the objectives of the embodiments of the present application is to provide a food freezing determination method in a refrigerator to solve the problem in the prior art that it is impossible to judge whether the food starts to freeze or has been frozen, thereby adjusting the internal temperature of the refrigerator accordingly. Prevent storage temperatures from being too high or too low.
  • a method for judging food freezing in a refrigerator comprising:
  • the food temperature begins to enter or is in the largest ice crystal formation zone of the food, it is determined that the food begins to freeze or is already in the freezing process.
  • the food freezing determination method in the refrigerator of the embodiment of the present application determines whether the food starts to freeze or is already in the freezing process by determining whether the food temperature starts to enter or is in the maximum ice crystal formation of the food. Obviously, based on the judgment, it is convenient to effectively control the freezing process of the food, and appropriately adjust the internal temperature of the refrigerator, thereby preventing the storage temperature from being too high or too low.
  • the step of determining whether the temperature of the food begins to enter or is in the largest ice crystal formation zone of the food product comprises:
  • the set time is less than 100 minutes
  • the step of determining whether the temperature of the food remains stable within a set time comprises:
  • the step of determining whether the temperature of the food begins to enter or is in the largest ice crystal formation zone of the food product comprises:
  • the step of determining whether the food has passed the cold point comprises:
  • the embodiment of the present application further provides a refrigerator food preservation method, comprising:
  • the temperature of the refrigerator is controlled to the highest temperature setting value
  • the refrigerator When the temperature in the refrigerator is raised to the maximum temperature setting value, the refrigerator is controlled to cool down until the food temperature starts to enter again or is in the maximum ice crystal formation zone of the food.
  • the refrigerator when the food starts to enter or is in the largest ice crystal formation zone, it indicates that the food starts to freeze or is already in the frozen state, thereby indicating that the temperature in the refrigerator is already in a lower state, so by raising the refrigerator
  • the temperature can prevent food taste from getting worse, nutrient loss and poor thawing.
  • the temperature of the refrigerator rises to a maximum temperature setting, if the high temperature continues to reach a good fresh-keeping effect, it will easily lead to food spoilage. Therefore, once the temperature of the refrigerator is raised to the highest temperature setting value, the refrigerator is controlled to cool down until the food temperature is relocated in the maximum ice crystal formation zone, and then the temperature of the refrigerator is controlled to rise, so that the temperature of the refrigerator is always in the maximum ice crystal formation. In the vicinity of the belt, the temperature of the refrigerator can be prevented from being too high or too low, so that the food is always maintained in a suitable temperature range.
  • the foregoing method further includes:
  • the set time is less than 100 minutes, and when the fluctuation of the food temperature within the set time is less than 5 degrees Celsius, it is concluded that the food temperature remains stable for a set time.
  • the method further includes:
  • the step of determining whether the food has passed the cold point comprises:
  • the embodiment of the present application further provides a fresh-keeping refrigerator, including:
  • a first temperature sensor for measuring the temperature of the food
  • the determining module is connected to the first temperature controller for receiving the food temperature measured by the first temperature controller, and determining whether the food temperature starts to enter or is in the maximum ice crystal generation zone.
  • the judging module judges the state of the food by the measured value of the first temperature sensor, thereby facilitating adjustment of the internal temperature of the refrigerator to prevent the temperature of the refrigerator from being too high or too low.
  • the fresh-keeping refrigerator further includes:
  • a second temperature sensor for measuring the temperature of the refrigerator
  • the controller is connected to the judging module and the second temperature sensor to control the temperature rise of the refrigerator when the food temperature starts to enter or is in the maximum ice crystal generation zone, and controls the refrigerator to cool down until the food temperature rises to the highest temperature setting value. The temperature begins to enter again or is in the largest ice crystal formation zone.
  • the freshness keeping refrigerator further includes a heat conducting plate on which the food is placed, and the first temperature sensor obtains the food temperature by measuring the temperature of the heat conducting plate.
  • the first temperature sensor and/or the second temperature sensor are contact temperature sensors or non-contact temperature sensors.
  • the first temperature sensor and/or the second temperature sensor is an infrared thermal sensor, a microwave temperature measurement temperature sensor, a noise temperature measurement temperature sensor, or a light temperature sensor.
  • Figure 1 is a schematic diagram showing a temperature change curve of freezing of a food after it has passed a cold point
  • Figure 2 is a schematic diagram showing the temperature change curve of the food without direct cooling
  • FIG. 3 is a schematic flow chart of a method for preserving a food of a refrigerator according to an embodiment
  • FIG. 4 is a schematic diagram showing the temperature curve of the food in the refrigerator obtained by the method for preserving the food of the refrigerator according to the embodiment.
  • connection and “connected” should be understood broadly, and may be, for example, a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. Or connected in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • connection in one piece; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium.
  • specific meanings of the above terms in the embodiments of the present application can be understood in a specific case.
  • the food freezing judgment method in the refrigerator of the present application includes:
  • the food temperature begins to enter or is in the largest ice crystal formation zone of the food, the food begins to freeze or is already in the freezing process.
  • the food freezing determination method in the refrigerator determines whether the food starts to freeze or is already in the freezing process by judging whether the food temperature starts to enter or is in the maximum ice crystal formation of the food. Obviously, based on the judgment, it is convenient to effectively control the freezing process of the food, and appropriately adjust the internal temperature of the refrigerator, thereby preventing the storage temperature from being too high or too low.
  • the foregoing steps of determining whether the temperature of the food begins to enter or are in the largest ice crystal formation zone of the food may include:
  • the foregoing step of determining whether the food has passed the cold point may include:
  • ⁇ s/ ⁇ t The magnitude of ⁇ s/ ⁇ t is calculated. When ⁇ s/ ⁇ t is greater than the set temperature change value, it is judged that the food has passed the cold point. Otherwise, continue to measure the food temperature and calculate the change value ⁇ s of the food temperature within the set time ⁇ t.
  • the method for determining whether the food has passed the cold point is not limited by the above examples, and any method disclosed in the prior art for judging that the food is too cold may be included in the present application.
  • the other is a curve corresponding to the freezing process that directly freezes without overcooling, as shown in Figure 2.
  • the temperature of the food is affected by the surrounding low temperature environment, and the temperature is continuously lowered until the temperature reaches the freezing point D.
  • a frozen plateau E begins to appear, and finally the temperature is lowered again until it is in equilibrium with the ambient temperature.
  • the method of judging the food freezing is to use the plateau of the temperature mentioned in Fig. 1 and Fig. 2, regardless of whether there is excessive cooling during the cooling process of the food, and after experiencing freezing, it will experience a maximum ice crystal formation zone, and the temperature curve is expressed. What came out was a smooth section. Therefore, by detecting the temperature during the whole process of cooling the food, it is judged whether or not the food enters the plateau, and it can be judged whether the food starts to freeze.
  • the step of determining whether the temperature of the food begins to enter or is in the largest ice crystal formation zone of the food may include:
  • Judging the change of the food temperature within the set time if the food temperature remains stable within the set time, it indicates that the food temperature begins to enter or is in the largest ice crystal formation zone within the set time. Moreover, when the food begins to enter or is in the largest ice crystal formation zone, its temperature is located near a certain value, which is related to the type of the food. For example, the temperature at which fresh fish begins to enter or is in the largest ice crystal formation zone is about -2 ° C, and the temperature at which the cucumber begins to enter or is in the largest ice crystal formation zone is about -0.8 ° C.
  • the present application also provides an idea for judging whether the food is frozen and controlling the food preservation of the refrigerator.
  • First measure the temperature of the food in the refrigerator. On this basis, it is judged whether the food starts to enter or is in the largest ice crystal formation zone, that is, whether the food is stable within a certain range within the set time value. If the measured food temperature is in the largest ice crystal zone, a corresponding control measure is taken to control the temperature of the refrigerator according to the food temperature. Otherwise, continue to monitor food temperature.
  • the temperature of the refrigerator is controlled to the highest temperature setting value
  • the refrigerator When the temperature in the refrigerator is raised to the maximum temperature setting value, the refrigerator is controlled to cool down until the food temperature starts to enter again or is in the maximum ice crystal formation zone of the food.
  • the set time is less than 100 minutes, and when the fluctuation value of the food temperature in the set time is less than 5 degrees Celsius, it indicates that the food temperature remains stable within the set time.
  • the set time is 20 minutes (minutes), and when the temperature of the food is within the set time, the temperature is -3 ° C (degrees Celsius, the units in other parts of the application file are also degrees Celsius) ⁇ 0 ° C, and the fluctuation
  • the range is ⁇ 0.3 °C, it can be judged at this time that the food starts to freeze or is already in a frozen state, so that reasonable control measures can be made based on the judgment result.
  • the embodiment of the present application further provides a food preservation method for a refrigerator, comprising:
  • the temperature of the refrigerator is controlled to the highest temperature setting value
  • the refrigerator When the temperature in the refrigerator is raised to the maximum temperature setting value, the refrigerator is controlled to cool down until the food temperature starts to enter again or is in the maximum ice crystal formation zone of the food.
  • the food is cooled down until the food temperature is relocated to the maximum ice crystal formation zone of the food temperature.
  • the temperature of the food in the refrigerator is controlled to rise. This cycle prevents the refrigerator from being too hot or too low, so that the food is always maintained in a suitable temperature range.
  • the temperature in the refrigerator is controlled to be in a lower state.
  • the temperature of the refrigerator is gradually increased until the temperature of the refrigerator rises to a high temperature setting.
  • the temperature of the control refrigerator is gradually lowered from the highest temperature setting.
  • stage I the temperature of the refrigerator is gradually increased until the temperature of the refrigerator rises to a high temperature setting.
  • the above steps control the temperature rise of the refrigerator to the highest temperature setting value can be directly realized by monitoring the temperature of the refrigerator, or can be realized indirectly by monitoring the temperature of the food.
  • the embodiment of the present application further provides a fresh-keeping refrigerator, including:
  • a first temperature sensor for measuring the temperature of the food
  • the judging module is connected to the first temperature controller for receiving the food temperature measured by the first temperature controller, and determining whether the food temperature starts to enter or is in the maximum ice crystal generation zone.
  • the judging module judges the state of the food by the measured value of the first temperature sensor, thereby facilitating adjustment of the internal temperature of the refrigerator to prevent the temperature of the refrigerator from being too high or too low.
  • the judging module can judge whether the food temperature starts to enter or is in the largest ice crystal generation zone by judging whether the food has passed the cold point, or can judge whether the food temperature starts to enter or is in the largest ice crystal generation zone by judging whether the food temperature enters a stable state. .
  • the fresh-keeping refrigerator further includes:
  • a second temperature sensor for measuring the temperature of the refrigerator
  • the controller is connected to the judging module and the second temperature sensor to control the temperature rise of the refrigerator when the food temperature starts to enter or is in the maximum ice crystal generation zone, and controls the refrigerator to cool down until the food temperature rises to the highest temperature setting value. The temperature begins to enter again or is in the largest ice crystal formation zone.
  • first temperature sensor and the second temperature sensor in this embodiment are not limited as long as the measurement of the temperature of the food and the refrigerator can be separately implemented.
  • first temperature sensor and the second temperature sensor may each be a contact temperature sensor or a non-contact temperature sensor.
  • the first temperature sensor and/or the second temperature sensor are an infrared thermal sensor, a microwave temperature measuring temperature sensor, a noise temperature measuring temperature sensor or a light temperature sensor.
  • the freshness keeping refrigerator further includes a heat conducting plate on which the food is placed, and the first temperature sensor obtains the food temperature by measuring the temperature of the heat conducting plate.
  • the first temperature sensor measures the temperature of the food by measuring the temperature of the heat conducting plate, and the measurement is simple.
  • the refrigerator in the present application generally refers to a product for storing foods, such as a freezer, a freezer, a refrigerator, and the like.

Abstract

一种冰箱内食品冻结判断方法、冰箱食品保鲜方法及保鲜冰箱。一种冰箱内食品冻结判断方法，包括：测量冰箱内食品温度；判断食品温度是否开始进入或者处于食品的最大冰晶生成带：如果食品温度开始进入或者处于食品的最大冰晶生成带，则食品开始冻结或者已经位于冻结过程中。通过判断食品温度是否开始进入或者处于食品的最大冰晶生成带来判断食品是否开始冻结或者已经位于冻结过程中。基于该判断可以便于控制食品的冻结过程，调节冰箱的内部温度，从而防止存储温度过高或者过低。

Description

冰箱内食品冻结判断方法、冰箱食品保鲜方法及保鲜冰箱
交叉引用
本申请引用于2017年10月31日提交的专利名称为“冰箱内食品冻结判断方法、冰箱食品保鲜方法及保鲜冰箱”的第2017110509562号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请实施例涉及冰箱技术领域，尤其涉及一种冰箱内食品冻结判断方法、冰箱食品保鲜方法及保鲜冰箱。
背景技术
目前冰箱间室温度一般是由用户手动设定，用户根据食品储存需求放入不同的间室，比如果蔬这些短时间内食用的、且不能冻结的食品需要放入冷藏室，而肉类需要较长时间存储且能够冻结的食品会放入冷冻室。现有技术无法有效的控制食品的冻结过程，带来最直接的问题即：高温存储容易腐坏，低温储存会冻结，食品冻结后口感和营养明显流失，且面临解冻困难等问题。
发明内容
本申请实施例旨在至少解决现有技术或相关技术中存在的技术问题之一。
本申请实施例的其中一个目的是：提供一种冰箱内食品冻结判断方法，以解决现有技术中存在的无法判断食物是否开始冻结或已经在冻结的问题，从而相应地调节冰箱的内部温度，防止存储温度过高或者过低。
一种冰箱内食品冻结判断方法，包括：
测量冰箱内食品温度；
判断食品温度是否开始进入或处于食品的最大冰晶生成带：
如果食品温度开始进入或者处于食品的最大冰晶生成带，判定食品开始冻结或者已经位于冻结过程中。
本申请实施例的冰箱内食品冻结判断方法，其通过判断食品温度是否开始进入或者处于食品的最大冰晶生成带来判断食品是否开始冻结或者已经位于冻结过程中。显然，基于该判断可以便于有效的控制食品的冻结过程，合适的调节冰箱的内部温度，从而防止存储温度过高或者过低。
在一个实施例中，所述判断食品温度是否开始进入或者处于食品的最大冰晶生成带的步骤，包括：
判断食品温度在设定时间内是否保持稳定，
如果保持稳定，表明该设定时间内食品温度开始进入或者处于最大冰晶生成带。
在一个实施例中，所述设定时间小于100分钟，
所述判断食品温度在设定时间内是否保持稳定的步骤，包括：
判断食品温度在设定时间内的温度波动是都小于5摄氏度，
如果小于5摄氏度，表明所述食品温度在所述设定时间内保持稳定；
如果不小于5摄氏度，表明所述食品温度在所述设定时间内未保持稳定。
在一个实施例中，所述判断食品温度是否开始进入或者处于食品的最大冰晶生成带的步骤，包括：
判断食品是否经过过冷点，当食品温度经过过冷点，表明食品开始进入或者处于最大冰晶生成带。
在一个实施例中，所述判断食品是否经过过冷点的步骤，包括：
判断食品温度是否骤升，当食品温度发生温度骤升时，表明食品经过了过冷点。
本申请实施例还提供一种冰箱食品保鲜方法，包括：
测量冰箱内食品温度；
根据食品温度控制冰箱的温度：
当食品温度开始进入或者处于食品最大冰晶生成带时，控制冰箱升温至最高温度设定值；
当冰箱内温度升温至所述最高温度设定值时，控制冰箱降温，直到食品温度重新开始进入或者处于食品最大冰晶生成带。
该方法中，当食品开始进入或者处于最大冰晶生成带时，此时说明食 品开始冻结或者已经位于冻结状态中，从而说明此时冰箱内的温度已经处于较低的一个状态，因此通过升高冰箱温度可以防止食品口感变差、营养流失和不好解冻等。而一旦冰箱温度升到的一个最高温度设定值时，此时如果持续高温又将达不到好的保鲜效果，容易导致食品腐坏。因此，一旦冰箱温度升温至所述最高温度设定值时，控制冰箱降温，直到食品温度重新位于最大冰晶生成带，之后又控制冰箱的温度升高，如此循环，使得冰箱温度一直在最大冰晶生成带附近，可以防止冰箱温度过高或者过低，使得食品始终维持在一个合适的温度范围内。
在一个实施例中，上述方法中还包括：
分析食品温度在设定时间内的变化情况，当食品温度在设定时间内保持稳定时，得出该设定时间内食品温度开始进入或者处于最大冰晶生成带。
在一个实施例中，所述设定时间小于100分钟，且当食品温度在所述设定时间内的波动值小于5摄氏度时，得出食品温度在设定时间内保持稳定。
在一个实施例中，所述方法还包括：
判断食品是否经过过冷点，当食品温度经过过冷点，得出食品开始进入或者处于最大冰晶生成带。
在一个实施例中，所述判断食品是否经过过冷点的步骤，包括：
判断食品温度是否骤升，当食品温度发生温度骤升时，则得出食品经过了过冷点。
除此以外，本申请实施例还提供一种保鲜冰箱，包括：
第一温度传感器，用于测量食品温度；
判断模块，和所述第一温度控制器连接，用于接收所述第一温度控制器测量的所述食品温度，并判断食品温度是否开始进入或者处于最大冰晶生成带。
本申请实施例的保鲜冰箱，判断模块通过第一温度传感器的测量数值判断出食品的状态，从而便于调节冰箱内部温度，防止冰箱温度过高或者过低。
在一个实施例中，所述保鲜冰箱还包括：
第二温度传感器，用于测量冰箱的温度；
控制器，和所述判断模块以及第二温度传感器连接，当食品温度开始进入或者处于最大冰晶生成带时，控制冰箱升温，并在冰箱升温至最高温度设定值时，控制冰箱降温，直到食品温度再次开始进入或者处于最大冰晶生成带。
在一个实施例中，所述保鲜冰箱还包括导热板，食品放置在所述导热板上，所述第一温度传感器通过测量所述导热板的温度获取食品温度。
在一个实施例中，所述第一温度传感器和/或所述第二温度传感器为接触式温度传感器或者非接触式温度传感器。
在一个实施例中，第一温度传感器和/或所述第二温度传感器为红外热传感器、微波测温温度传感器、噪声测温温度传感器或者光线温度传感器。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是食品降温经过过冷点之后冻结的温度变化曲线示意图；
图2是食品无过冷直接冻结的温度变化曲线示意图；
图3是实施例的冰箱食品保鲜方法的流程示意图；
图4是基于实施例的冰箱食品保鲜方法得到的冰箱内食品温度曲线示意图。
具体实施方式
为了能够更清楚地理解本申请实施例的上述目的、特征和优点，下面结合附图和具体实施方式对本申请实施例进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在本申请实施例的描述中，需要说明的是，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、 “水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。
在本申请实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请实施例中的具体含义。
本申请的冰箱内食品冻结判断方法，包括：
测量冰箱内食品温度；
判断食品温度是否开始进入或者处于食品的最大冰晶生成带：
如果食品温度开始进入或者处于食品的最大冰晶生成带，则食品开始冻结或者已经位于冻结过程中。
该冰箱内食品冻结判断方法，其通过判断食品温度是否开始进入或者处于食品的最大冰晶生成带来判断食品是否开始冻结或者已经位于冻结过程中。显然，基于该判断可以便于有效的控制食品的冻结过程，合适的调节冰箱的内部温度，从而防止存储温度过高或者过低。
由于常温下的食品放入冰箱的任意低温间室内时，随着周围低温影响，食品温度会持续往下走低直至冻结。其中，食品在冰箱内降温过程曲线有两种：
一种是发生冻结之前食品温度出现过冷对应的曲线，请参见图1。其中，食品温度到达过冷点A之前，先会在过冷点A附近持续一段时间；当食品温度到达过冷点A(过冷点一般比食品的冻结点要低)后，食品温度在过冷点A会出现一个瞬间的抬温，抬升到食品的冻结温度B(肉类的冻结温度一般在-1℃左右，果蔬的冻结温度略高，一般在-0.5℃左右)，这时候食品开始冻结，进入食品最大冰晶生成带。其中，食品进入其最大冰晶生成带时，表现在温度曲线上是一段温度平稳段C。在经过最大冰晶 生成带之后，只要冰箱温度足够低，那么食品的会继续降温直至到达与周围环境温度平衡的水平。
对应该种有过冷的情况，前述判断食品温度是否开始进入或者处于食品最大冰晶生成带的步骤，可以包括：
判断食品是否经过过冷点，当食品温度经过过冷点，表明食品开始进入或者处于最大冰晶生成带。
通过判断食品是否过经过过冷点来判断食品是否开始进入或者处于最大冰晶生成带，显然是一种简单有效的判断方法。
其中，前述判断食品是否经过过冷点的步骤，可以包括：
判断食品温度是否骤升，当食品温度发生温度骤升时，则表明食品经过了过冷点。其中，可以通过分析图1中曲线的斜率来判断食品温度是否骤升，当图1中曲线的斜率大于某一固定值时，则得出温度发生骤升。例如，当食品温度的变化大于10摄氏度/分钟时，可以得出温度发生了骤变。当然需要说明的是，此处取值10摄氏度/分钟不构成对本申请保护范围的限制。
其中，前述步骤判断食品温度是否骤升可以通过以下办法来实现：
每间隔设定时间△t测量一次食品温度，记录该设定时间△t内食品温度的变化值△s；
计算△s/△t的大小，当△s/△t大于设定温度变化值，则判断食品经过过冷点。否则，继续测量食品温度并计算设定时间△t内食品温度的变化值△s。
当然需要说明的是，前述步骤判断食品是否经过过冷点的实现方法不受上述举例的限制，任意现有技术中已经公开的判断食品过冷的方法都可以包含在本申请中。
另外一种是降温过程直接发生冻结无过冷现象对应的曲线，如图2所示。食品温度受周围低温环境影响，不断降温，直至降温到冻结点D开始出现一段冻结平稳段E，最后再次降温直至与周围环境温度平衡。
该种情况下判断食品冻结方法就是利用图1和图2中所提到的温度的平稳段，无论食品降温过程中有无过冷现象，开始冻结后都会经历一个最大冰晶生成带，温度曲线表现出来的是一个平稳段。所以，在食品整个降 温过程中通过对温度的检测，判断是否进入平稳段，即可判断食品是否开始冻结。
该种情况下，前述判断食品温度是否开始进入或者处于食品的最大冰晶生成带的步骤，可以包括：
判断食品温度在设定时间内的变化情况，如果食品温度在设定时间内保持稳定，则表明该设定时间内食品温度开始进入或者处于最大冰晶生成带。并且，当食品开始进入或者处于最大冰晶生成带时，其温度是位于某一特定值附近的，该具体取值和食品的种类有关。例如，新鲜鱼肉开始进入或处于最大冰晶生成带的温度约为-2℃，而黄瓜开始进入或处于最大冰晶生成带的温度约为-0.8℃。
请参见图3，本申请还提供了一种判断食品是否冻结以及控制冰箱食品保鲜的思路。首先，测量冰箱内食品温度。在此基础上，判断食品是否开始进入或者处于最大冰晶生成带，也即判断食品在设定时间值内是否在特定范围内保持稳定。如果测得食品温度位于最大冰晶带，则做出相应控制措施，即根据食品温度控制冰箱的温度。否则，继续监测食品温度。
此处的“如果测得食品温度位于最大冰晶带，则做出相应控制措施”中的“相应控制措施”也即后文提到的：
当食品温度开始进入或者处于食品最大冰晶生成带时，控制冰箱升温至最高温度设定值；
当冰箱内温度升温至所述最高温度设定值时，控制冰箱降温，直到食品温度重新开始进入或者处于食品最大冰晶生成带。
本实施例中，所述设定时间小于100分钟，且当食品温度在所述设定时间内的波动值小于5摄氏度时，表明食品温度在设定时间内保持稳定。
例如，设定时间取20min(分钟)，并且当食品温度在所述设定时间内的温度为-3℃(摄氏度，申请文件中其它地方的单位也均为摄氏度)～0℃时，且波动范围在±0.3℃时，此时可以判断食品开始冻结或者已经位于冻结状态中，从而可以基于判断结果做出合理的控制措施。
需要说明的是，本申请中，前述步骤判断食品是否开始进入或者处于最大冰晶生成带的实现方法不受上述举例的限制。其它任何现有技术中公开的可用于判断食品和最大冰晶生成带关系的方法也应当包含在本申请 当中。
在上述基础上，本申请实施例还提供一种冰箱食品保鲜方法，包括：
测量冰箱内食品温度；
根据食品温度控制冰箱的温度：
当食品温度开始进入或者处于食品最大冰晶生成带时，控制冰箱升温至最高温度设定值；
当冰箱内温度升温至所述最高温度设定值时，控制冰箱降温，直到食品温度重新开始进入或者处于食品最大冰晶生成带。
基于该控制方法得到冰箱内食品温度曲线请参见图4。在F阶段内，食品温度逐渐降低，直至食品温度达到平稳段，也即最大冰晶生成带，此时说明食品开始冻结或者已经位于冻结状态中。因此在G阶段内，控制食品温度慢慢升高。值得一提的是，虽然G阶段食品温度具有逐渐升高的趋势，但是最高值不宜太高，否则会使得食品存在口感变差、营养流失或者不好解冻等问题。并且，G阶段持续时间也不宜过长，避免冰箱内的温度持续处于高温下导致食品保鲜效果不佳以及出现食品腐坏的情况。G阶段之后，对应H阶段，控制食品降温，直到食品温度重新位于食品温度最大冰晶生成带。对应I阶段，当食品开始进入或者处于最大冰晶生成带时，又控制冰箱内的食品温度升高。如此循环，可以防止冰箱温度过高或者过低，使得食品始终维持在一个合适的温度范围内。
而为了使得冰箱内的食品变化趋势如图4，则需要相应的控制冰箱的温度。其中，对应F阶段，控制冰箱内的温度处于较低的一个状态。对应G阶段，控制冰箱温度逐渐升高，直至冰箱温度升到高温度设定值。对应H阶段，控制冰箱温度由最高温度设定值逐渐降低。对应I阶段，控制冰箱温度逐渐升高，直至冰箱温度升到高温度设定值。如此循环往复。
需要说明的是，上述步骤控制冰箱升温至最高温度设定值既可以通过监测冰箱的温度直接实现，也可以通过监测食品温度间接实现。
除此以外，本申请实施例还提供一种保鲜冰箱，包括：
第一温度传感器，用于测量食品温度；
判断模块，和第一温度控制器连接，用于接收第一温度控制器测量的食品温度，并判断食品温度是否开始进入或者处于最大冰晶生成带。
本申请实施例的保鲜冰箱，判断模块通过第一温度传感器的测量数值判断出食品的状态，从而便于调节冰箱内部温度，防止冰箱温度过高或者过低。
其中，判断模块可以通过判断食品是否经过过冷点来判断食品温度是否开始进入或者处于最大冰晶生成带，也可以通过判断食品温度是否进入稳定带来判断食品温度是否开始进入或者处于最大冰晶生成带。
在一个实施例中，所述保鲜冰箱还包括：
第二温度传感器，用于测量冰箱的温度；
控制器，和所述判断模块以及第二温度传感器连接，当食品温度开始进入或者处于最大冰晶生成带时，控制冰箱升温，并在冰箱升温至最高温度设定值时，控制冰箱降温，直到食品温度再次开始进入或者处于最大冰晶生成带。
需要说明的是，本实施例中的第一温度传感器和第二温度传感器的类型不受限制，只要能够分别实现食品和冰箱温度的测量即可。例如，所述第一温度传感器和所述第二温度传感器均可以为接触式温度传感器或者非接触式温度传感器。其中，第一温度传感器和/或所述第二温度传感器为红外热传感器、微波测温温度传感器、噪声测温温度传感器或者光线温度传感器等。
在一个实施例中，所述保鲜冰箱还包括导热板，食品放置在所述导热板上，所述第一温度传感器通过测量所述导热板的温度获取食品温度。该种情况下，第一温度传感器通过测量导热板的温度来测量食品温度，其测量简单。
需要说明的是，本申请中的冰箱泛指冷柜、冰柜、冰箱等任意用于存储食品的产品。
以上实施方式仅用于说明本申请实施例，而非对本申请的限制。尽管参照实施例对本申请进行了详细说明，本领域的普通技术人员应当理解，对本申请实施例的技术方案进行各种组合、修改或者等同替换，都不脱离本申请实施例技术方案的精神和范围，均应涵盖在本申请的权利要求范围当中。

Claims (15)

  1. 一种冰箱内食品冻结判断方法，其特征在于，包括：
    测量冰箱内食品温度；
    判断食品温度是否开始进入或处于食品的最大冰晶生成带：
    如果食品温度开始进入或者处于食品的最大冰晶生成带，判定食品开始冻结或者已经位于冻结过程中。
  2. 根据权利要求1所述的方法，其特征在于，所述判断食品温度是否开始进入或者处于食品的最大冰晶生成带的步骤，包括：
    判断食品温度在设定时间内是否保持稳定，
    如果保持稳定，表明该设定时间内食品温度开始进入或者处于最大冰晶生成带。
  3. 根据权利要求2所述的方法，其特征在于，其中：
    所述设定时间小于100分钟，
    所述判断食品温度在设定时间内是否保持稳定的步骤，包括：
    判断食品温度在设定时间内的温度波动是都小于5摄氏度，
    如果小于5摄氏度，表明所述食品温度在所述设定时间内保持稳定；
    如果不小于5摄氏度，表明所述食品温度在所述设定时间内未保持稳定。
  4. 根据权利要求1所述的方法，其特征在于，所述判断食品温度是否开始进入或者处于食品的最大冰晶生成带的步骤，包括：
    判断食品是否经过过冷点，当食品温度经过过冷点，表明食品开始进入或者处于最大冰晶生成带。
  5. 根据权利要求4所述的方法，其特征在于，所述判断食品是否经过过冷点的步骤，包括：
    判断食品温度是否骤升，当食品温度发生温度骤升时，表明食品经过了过冷点。
  6. 一种冰箱食品保鲜方法，其特征在于，包括：
    测量冰箱内食品温度；
    根据食品温度控制冰箱的温度：
    当食品温度开始进入或者处于食品最大冰晶生成带时，控制冰箱升温 至最高温度设定值；
    当冰箱的温度升温至所述最高温度设定值时，控制冰箱降温，直到食品温度重新开始进入或者处于食品最大冰晶生成带。
  7. 根据权利要求6所述的方法，其特征在于，还包括：
    分析食品温度在设定时间内的变化情况，当食品温度在设定时间内保持稳定时，表明该设定时间内食品温度开始进入或者处于最大冰晶生成带。
  8. 根据权利要求7所述的方法，其特征在于，其中：
    所述设定时间小于100分钟，且当食品温度在所述设定时间内的波动值小于5摄氏度时，表明食品温度在设定时间内保持稳定。
  9. 根据权利要求6所述的方法，其特征在于，还包括：
    判断食品是否经过过冷点，当食品温度经过过冷点，表明食品开始进入或者处于最大冰晶生成带。
  10. 根据权利要求9所述的方法，其特征在于，所述判断食品是否经过过冷点的步骤，包括：
    判断食品温度是否骤升，当食品温度发生温度骤升时，则表明食品经过了过冷点。
  11. 一种保鲜冰箱，其特征在于，包括：
    第一温度传感器，用于测量食品温度；
    判断模块，和所述第一温度控制器连接，用于接收所述第一温度控制器测量的所述食品温度，并判断食品温度是否开始进入或者处于最大冰晶生成带。
  12. 根据权利要求11所述的冰箱，其特征在于，还包括：
    第二温度传感器，用于测量冰箱的温度；
    控制器，和所述判断模块以及第二温度传感器连接，当食品温度开始进入或者处于最大冰晶生成带时，控制冰箱升温，并在冰箱升温至最高温度设定值时，控制冰箱降温，直到食品温度再次开始进入或者处于最大冰晶生成带。
  13. 根据权利要求11所述的冰箱，其特征在于，所述保鲜冰箱还包括导热板，食品放置在所述导热板上，所述第一温度传感器通过测量所述 导热板的温度获取食品温度。
  14. 根据权利要求12所述的冰箱，其特征在于，所述第一温度传感器和/或所述第二温度传感器为接触式温度传感器或者非接触式温度传感器。
  15. 根据权利要求14所述的冰箱，其特征在于，第一温度传感器和/或所述第二温度传感器为红外热传感器、微波测温温度传感器、噪声测温温度传感器或者光线温度传感器。
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