WO2019085726A1

WO2019085726A1 - Freeze determining method for food in refrigerator, preservation method for food in refrigerator, and preservation refrigerator

Info

Publication number: WO2019085726A1
Application number: PCT/CN2018/110107
Authority: WO
Inventors: 龚勤勤; 史慧新; 伍志刚; 宁志芳
Original assignee: 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
Priority date: 2017-10-31
Filing date: 2018-10-12
Publication date: 2019-05-09
Also published as: CN107631549A

Abstract

A freeze determining method for food in a refrigerator, a preservation method for food in the refrigerator, and a preservation refrigerator. The freeze determining method for food in a refrigerator comprises: measure the temperature of food in the refrigerator; determining whether the temperature of the food exceeds a supercooling point; and if the temperature of the food exceeds the supercooling point, the food starts to freeze or is in a freezing process. The freezing process of food can be effectively controlled based on the determination, and the inner temperature of the refrigerator is regulated, thereby preventing an excessively-high or excessively-low storage temperature.

Description

Food freezing judgment method in refrigerator, refrigerator food preservation method and fresh-keeping refrigerator

cross reference

The present application is hereby incorporated by reference in its entirety in its entirety in its entirety in its entirety in the the the the the the the the the the the the the the the the the the the

Technical field

The embodiments of the present disclosure relate to the technical field of refrigerators, and in particular, to a food freezing determination method in a refrigerator, a refrigerator food preservation method, and a fresh-keeping refrigerator.

Background technique

At present, 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.

Summary of the invention

The embodiments of the present disclosure are 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 disclosure is to provide a method for judging food freezing in a refrigerator, which solves 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 food storage temperatures from being too high or too low.

The food freezing determination method in the refrigerator of the embodiment of the present disclosure includes:

Measuring the temperature of the food in the refrigerator;

Determine if the food temperature has passed the cold point:

If the food passes the cold spot, the food begins to freeze or is already in the process of freezing.

The food freezing determination method in the refrigerator of the embodiment of the present disclosure determines whether the food starts to freeze or is already in the freezing process by determining whether the food temperature has passed the cold point. 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.

In one embodiment, the step of determining whether the temperature of the food has passed the cold point comprises:

Judging whether the temperature of the food has risen sharply, when the temperature of the food temperature rises sharply, it is concluded that the food has passed the cold point.

In one embodiment, the step of determining whether the temperature of the food is swelled comprises:

The food temperature is measured once every interval setting time Δt, the change value Δs of the food temperature in the set time Δt is recorded, and the magnitude of Δs/Δt is calculated, and when Δs/Δt is greater than the set temperature change value , to determine that the food has passed the cold point.

The embodiment of the present disclosure further provides a refrigerator food preservation method, comprising:

Measuring the temperature of the food in the refrigerator;

Controlling the temperature of the refrigerator according to the food temperature:

When the food passes the cold point, control the temperature of the refrigerator to the highest temperature setting;

When the temperature of the refrigerator is raised to the maximum temperature setting value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again.

In the method, when the food passes the cold point, 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 that the food taste can be prevented by raising the temperature of the refrigerator. Deterioration, loss of nutrients and poor thawing. Once 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 maximum temperature set value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again, and then the temperature of 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.

Judging whether the temperature of the food has risen sharply, when the temperature of the food temperature rises sharply, it indicates that the food has passed the cold point.

The embodiment of the present disclosure further provides a fresh-keeping refrigerator, comprising:

a first temperature sensor for measuring the temperature of the food;

The determining module is connected to the first temperature controller for receiving the temperature of the food sent by the first temperature sensor, and determining whether the food has passed the cold point according to the temperature of the food. In the fresh-keeping refrigerator of the embodiment of the present disclosure, 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.

In one embodiment, the fresh-keeping refrigerator further includes:

a second temperature sensor for measuring the temperature of the refrigerator;

The controller is connected with the judging module and the second temperature sensor. When the food passes the cold point, the temperature of the refrigerator is controlled, and when the refrigerator is heated to the highest temperature setting value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again. .

In one embodiment, 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.

In one embodiment, the first temperature sensor and/or the second temperature sensor are contact temperature sensors or non-contact temperature sensors.

In one embodiment, 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.

DRAWINGS

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present disclosure, and other drawings may be obtained from those skilled in the art without any inventive effort.

Figure 1 is a schematic diagram showing a temperature change curve of freezing of a food after it has passed a cold point;

2 is a schematic flow chart of a method for preserving a food of a refrigerator according to an embodiment;

3 is a schematic view showing a temperature curve of a food in a refrigerator obtained by the method for preserving the food of the refrigerator according to the embodiment.

Detailed ways

The embodiments of the present disclosure will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In the description of the embodiments of the present disclosure, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right" are used. Orientation or positional relationship of "vertical", "horizontal", "top", "bottom", "inner", "outside", etc., is based on the orientation or positional relationship shown in the drawings, only for the convenience of description. The disclosure and the simplification of the description of the embodiments of the present disclosure are not intended to be construed as a limitation or limitation. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present disclosure, it should be noted that the terms “connected” and “connected” should be understood broadly, and may be 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. The specific meanings of the above terms in the embodiments of the present disclosure can be understood in the specific circumstances for those skilled in the art.

The food freezing determination method in the refrigerator of the embodiment includes:

Measuring the temperature of the food in the refrigerator;

Determine if the food temperature has passed the cold point:

The curve for the food temperature to appear too cold before freezing occurs, see Figure 1. Among them, before the temperature of the food reaches the cold point A, it will continue for a period of time near the cold point A; when the food temperature reaches the cold point A (the cold point is generally lower than the freezing point of the food), the food temperature is over. Cold point A will appear an instantaneous temperature rise, raised to the freezing temperature of the food B (meat freezing temperature is generally around -1 ° C, the freezing temperature of fruits and vegetables is slightly higher, generally around -0.5 ° C), when the food begins freeze.

In one embodiment, the step of determining whether the temperature of the food has passed the cold point may include:

Among them, the steps of "determining whether the temperature of the food is swelling" are shown in Figure 2, including:

Measuring the food temperature once every interval set time Δt, recording the change value Δs of the food temperature within the set time Δt;

Calculate the magnitude of △s/△t. When △s/△t is greater than the set temperature change value, it is judged that the food has passed the cold point and corresponding control measures are taken. Otherwise, continue to measure the food temperature and calculate the change value Δs of the food temperature within the set time Δt.

"Calculate the magnitude of △s / Δt, when △ s / Δt is greater than the set temperature change value, then judge the food through the cold point, make the corresponding control measures" "control measures" is also mentioned later :

When the temperature in the refrigerator rises to the maximum temperature setting value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again.

This method determines whether the temperature of the food is swelled, and the essence is to judge the slope of the curve in FIG. It is found from Figure 1 that the slope of the food suddenly becomes very large as it passes through the cold spot. Here, the set temperature change value can be taken at 10 degrees Celsius/minute, that is, when Δs/Δt is greater than 10 degrees Celsius/minute, the conclusion that the food passes the cold point is obtained. It should be noted that the range of values for setting the temperature change value is not limited by the examples herein, and any other suitable value may be adopted.

The present disclosure also provides a refrigerator food preservation method, comprising:

Measuring the temperature of the food in the refrigerator;

Control the temperature of the refrigerator according to the temperature of the food:

The above steps are repeated to further maintain the temperature of the food in the refrigerator within an appropriate range.

As shown in FIG. 3, in the food preservation method of the refrigerator, the temperature of the refrigerator is controlled such that the temperature of the food in the refrigerator changes as shown by the curve in FIG. Among them, in the C stage, the temperature of the food gradually decreases until it reaches the point of too cold. After that, the temperature of the food gradually rises, corresponding to the D stage. It is worth mentioning that although the temperature of food in stage D has a gradually increasing trend, the highest value should not be too high, otherwise it will cause problems such as poor taste of the food, loss of nutrients or poor thawing. Moreover, the duration of the D phase should not be too long, and the temperature in the refrigerator is kept at a high temperature, resulting in poor food preservation effect and food spoilage. After the D stage, the food temperature gradually began to decrease, corresponding to the E stage.

In order to make the food change trend in the refrigerator as shown in Figure 3, it is necessary to control the temperature of the refrigerator accordingly. Wherein, corresponding to the C stage, the temperature in the refrigerator is controlled to be in a lower state. Corresponding to the D stage, since the temperature of the food is gradually increased at this stage, the temperature of the refrigerator is controlled so that the temperature of the refrigerator rises until the highest temperature setting is reached. Among them, the maximum temperature setting value can be determined through experiments. The maximum temperature setting values may be different for different refrigerators, different application areas and corresponding different foods. The corresponding maximum temperature setting can be tested before leaving the factory and stored in the storage unit of the refrigerator. Corresponding to the E stage, the temperature of the food gradually decreases, so the temperature of the refrigerator is controlled so that the temperature of the refrigerator gradually decreases until the temperature of the food reaches the too cold point again, and the temperature of the refrigerator is stopped. Corresponding to the F stage, the temperature of the food gradually starts to rise. In order to achieve this kind of change trend of the food, the temperature of the refrigerator is controlled to rise until the temperature of the refrigerator reaches the highest temperature setting value, so that the temperature in the refrigerator is controlled reciprocally.

In Fig. 3, in order to achieve freshness preservation of the food in the refrigerator, the temperature of the food is repeatedly raised and lowered. This cycle prevents the refrigerator from being too hot or too low, so that the food is always maintained in a suitable temperature range. Correspondingly, the temperature in the refrigerator is controlled to change repeatedly, so that the food temperature change of the refrigerator conforms to the curve in FIG.

In the refrigerator food preservation method of the embodiment, the step of determining whether the temperature of the food has passed the cold point may include:

In one embodiment, the foregoing step of determining whether the temperature of the food is swelled may include:

The food temperature is measured once every interval set time Δt, and the change value Δs of the food temperature in the set time Δt is calculated, and when the change value Δs is greater than the set temperature change value, it is judged that the food has passed the cold point.

The present disclosure also provides a fresh-keeping refrigerator comprising:

a first temperature sensor for measuring the temperature of the food;

The judging module is connected to the first temperature controller for receiving the temperature of the food, and determining whether the food has passed the cold point according to the temperature of the food.

In the fresh-keeping refrigerator of the embodiment of the present disclosure, 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.

In one embodiment, the fresh-keeping refrigerator further includes:

a second temperature sensor for measuring the temperature of the refrigerator;

The controller is connected with the judging module and the second temperature sensor. When the food passes the cold point, the temperature of the refrigerator is controlled, and when the refrigerator is heated to the highest temperature setting value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again.

It should be noted that the types of the 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. For example, the 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.

In one embodiment, 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. In this case, the first temperature sensor measures the temperature of the food by measuring the temperature of the heat conducting plate, and the measurement is simple.

It should be noted that 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.

The above embodiments are only used to illustrate the embodiments of the present disclosure, and are not intended to limit the embodiments of the present disclosure. While the embodiments of the present disclosure have been described in detail with reference to the embodiments of the embodiments of the embodiments of the invention And the scope should be covered by the scope of the claims of the present disclosure.

Claims

A method for judging food freezing in a refrigerator, comprising:

Measuring the temperature of the food in the refrigerator;

Determine if the food temperature has passed the cold point:

If the food passes the cold spot, the food begins to freeze or is already in the process of freezing.
The method according to claim 1, wherein the step of determining whether the temperature of the food has passed the cold point comprises:

Judging whether the temperature of the food has risen sharply, when the temperature of the food rises sharply, it indicates that the food has passed the cold point.
The method according to claim 2, wherein the step of determining whether the temperature of the food is swelled comprises:

The food temperature is measured once every interval setting time Δt, the change value Δs of the food temperature in the set time Δt is recorded, and the magnitude of Δs/Δt is calculated, and when Δs/Δt is greater than the set temperature change value , to determine that the food has passed the cold point.
A refrigerator food preservation method, characterized in that it comprises:

Measuring the temperature of the food in the refrigerator;

Controlling the temperature of the refrigerator according to the food temperature:

When the food passes the cold point, control the temperature of the refrigerator to the highest temperature setting;

When the temperature of the refrigerator is raised to the maximum temperature setting value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again.
The method according to claim 4, wherein the step of determining whether the temperature of the food has passed the cold point comprises:

Judging whether the temperature of the food has risen sharply, when the temperature of the food temperature rises sharply, it indicates that the food has passed the cold point.
A fresh-keeping refrigerator characterized by comprising:

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 sent by the first temperature sensor, and determining whether the food has passed the cold point according to the food temperature.
The refrigerator according to claim 6, further comprising:

a second temperature sensor for measuring the temperature of the refrigerator;

The controller is connected with the judging module and the second temperature sensor. When the food passes the cold point, the temperature of the refrigerator is controlled, and when the refrigerator is heated to the highest temperature setting value, the refrigerator is controlled to cool down until the food temperature reaches the supercooling point again. .
The refrigerator according to claim 6, wherein the fresh-keeping refrigerator further comprises a heat-conducting plate on which the food is placed, and the first temperature sensor acquires a food temperature by measuring a temperature of the heat-conducting plate.
The refrigerator according to claim 7, wherein the first temperature sensor and/or the second temperature sensor is a contact temperature sensor or a non-contact temperature sensor.
The refrigerator according to claim 9, wherein 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.