阅读说明：本技术 冰箱除霜方法、装置、控制设备、冰箱和存储介质 (Refrigerator defrosting method and device, control equipment, refrigerator and storage medium ) 是由 田德强 李平 魏建 孙川川 戚悦 于 2021-08-04 设计创作，主要内容包括：本申请涉及一种冰箱除霜方法、装置、控制设备、冰箱和存储介质。所述方法包括：获取压电设备输出的当前电压信号,并检测冰箱的当前次制冷时长；若当前电压信号小于或等于预设电压值、且当前次制冷时长大于预设单次制冷时长,则启动冰箱的除霜设备,其中,压电设备用于监测冰箱的蒸发器上的霜层厚度而对应输出电压信号,实现实时监控蒸发器上的结霜状况,依据蒸发器上的结霜状况以及当前次制冷时长来判断是否启动除霜设备,改变了传统定时除霜的方式,保证能够根据结霜状况及时除霜,提升除霜效率,有利于冰箱节能,并提升冰箱的安全性能延长冰箱的使用寿命。(The application relates to a refrigerator defrosting method, a refrigerator defrosting device, a control device, a refrigerator and a storage medium. The method comprises the following steps: acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; if the current voltage signal is smaller than or equal to the preset voltage value and the current refrigeration time is longer than the preset single refrigeration time, the defrosting equipment of the refrigerator is started, wherein the piezoelectric equipment is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting the voltage signal correspondingly, the frosting condition on the evaporator is monitored in real time, whether the defrosting equipment is started or not is judged according to the frosting condition on the evaporator and the current refrigeration time, the traditional timing defrosting mode is changed, timely defrosting according to the frosting condition is guaranteed, defrosting efficiency is improved, energy saving of the refrigerator is facilitated, the safety performance of the refrigerator is improved, and the service life of the refrigerator is prolonged.)

1. A defrosting method for a refrigerator is characterized by comprising the following steps:

acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and if the current voltage signal is less than or equal to a preset voltage value and the current refrigeration time is greater than the preset single refrigeration time, starting the defrosting equipment of the refrigerator.

2. The defrosting method for a refrigerator according to claim 1, further comprising the steps of:

if the current voltage signal is greater than the preset voltage value and/or the current refrigerating time is less than or equal to the preset single refrigerating time, acquiring a current compartment temperature value output by compartment temperature measuring equipment of the refrigerator, and detecting the running time of the refrigerator;

and if the current compartment temperature value is less than or equal to a preset compartment temperature value and the operation time is longer than a preset operation time, starting the defrosting equipment of the refrigerator.

3. The defrosting method for a refrigerator according to claim 2, further comprising the steps of:

if the temperature value of the current compartment is greater than the temperature value of the preset compartment and/or the operation time length is less than or equal to the preset operation time length, executing the following steps: and acquiring the current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator.

4. The defrosting method for a refrigerator according to any one of claims 1 to 3, further comprising, before the step of obtaining the current voltage signal output by the piezoelectric device and detecting the current cooling time period of the refrigerator, the steps of:

acquiring the current ambient temperature of the ambient temperature measuring equipment of the refrigerator;

acquiring the current environment humidity of the environment humidity measuring equipment of the refrigerator;

calibrating the preset voltage value based on the current ambient temperature and the current ambient humidity.

5. A defrosting apparatus for a refrigerator, comprising:

the data acquisition module is used for acquiring a current voltage signal output by the piezoelectric equipment and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and the judgment control module is used for starting the defrosting equipment of the refrigerator if the current voltage signal is less than or equal to a preset voltage value and the current refrigeration time is greater than the preset single refrigeration time.

6. A control device comprising an analysis and judgment module and a controller, the analysis and judgment module and the controller together implementing the steps of the method of any one of claims 1 to 4.

7. A refrigerator comprising the control device of claim 6, further comprising a piezoelectric device;

the piezoelectric device is electrically connected with the control device; the piezoelectric device is arranged on an evaporator of the refrigerator;

the piezoelectric device is used for monitoring the thickness of a frost layer on the evaporator to output a voltage signal correspondingly, and transmitting the voltage signal to the control device.

8. The refrigerator according to claim 7, wherein the piezoelectric device includes a piezoelectric sensor and a conversion circuit;

the piezoelectric sensor is electrically connected with the control equipment through the conversion circuit.

9. The refrigerator according to claim 7, further comprising a compartment temperature measuring device;

the compartment temperature measuring equipment is electrically connected with the control equipment; the compartment temperature measuring equipment is arranged in a refrigerating compartment and a freezing compartment of the refrigerator;

the compartment temperature measuring equipment is used for measuring compartment temperature values in a refrigerating compartment and a freezing compartment of the refrigerator and transmitting the compartment temperature values to the control equipment.

10. The refrigerator according to any one of claims 7 to 9, further comprising an environment temperature measuring device and an environment humidity measuring device;

the environment temperature measuring equipment and the environment humidity measuring equipment are respectively and electrically connected with the control equipment;

the environment temperature measuring equipment and the environment humidity measuring equipment are arranged outside the refrigerator;

the environment temperature measuring equipment is used for measuring an environment temperature value of the refrigerator and transmitting the environment temperature value to the control equipment;

the environment humidity measuring equipment is used for measuring the environment humidity value of the refrigerator and transmitting the environment humidity value to the control equipment.

11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.

Technical Field

The application relates to the technical field of refrigeration preparation, in particular to a refrigerator defrosting method, a device, control equipment, a refrigerator and a storage medium.

Background

Along with the development of household appliance technology, the living standard and the living quality of people are further improved, and the demands on household appliances are more and more advanced and intelligent. In particular to a refrigerator closely connected with the daily life of people, a high-end, intelligent and large-capacity energy-saving fresh-keeping air-cooled refrigerator becomes a new favorite of people's modern life and a symbol of quality life. Although the air-cooled refrigerator has the advantages of uniform indoor temperature, high refrigeration speed, accurate temperature and humidity control, classified storage, high-end atmosphere and the like, in the use process of the air-cooled refrigerator, due to the fact that moisture in stored food is evaporated and a user frequently opens and closes a door, even the user puts too much food with higher temperature and higher humidity at one time, in summer with high temperature and high humidity, the user can take the food to open and close the door too many times or forget to close the door after taking the food, long-time working operation of the refrigerator in the environment with high temperature and high humidity can be caused, the evaporator surface is thickened, and the evaporator surface can form ice layers with different thicknesses through circulating frosting and defrosting. The thickness of the frost layer or the existence of the ice layer increases the heat exchange resistance on the surface of the evaporator and the circulation resistance of air on the surface of the evaporator, even blocks the air circulation on the surface of the evaporator, influences the performance of a refrigeration system, causes the reduction of the refrigeration efficiency of the system and increases the energy consumption. For example, when the thickness of the frost layer on the surface of the evaporator of the air-cooled refrigerator reaches 5mm (millimeter), the refrigerator consumes about 20% more energy, so timely defrosting is very critical.

At present, most of air-cooled refrigerators use preset defrosting control time and preset defrosting exit temperature, namely: the timer times defrosting. However, the frosting and icing state of the refrigerator is related to the using state of the refrigerator, the using habits of different consumers are different, the actual frosting or icing state of the surface of the evaporator cannot be detected by simply defrosting and deicing the surface of the evaporator according to time, the defrosting can be performed when the frosting amount does not affect the refrigerating efficiency, or the defrosting effect is not achieved when the frosting amount has reached the state that the refrigerating efficiency is seriously affected.

Disclosure of Invention

In view of the above, it is necessary to provide a refrigerator defrosting method, a device, a control apparatus, a refrigerator and a storage medium capable of improving a defrosting effect of the refrigerator.

A defrosting method for a refrigerator comprises the following steps:

acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and if the current voltage signal is less than or equal to the preset voltage value and the current refrigeration time is greater than the preset single refrigeration time, starting the defrosting equipment of the refrigerator.

In one embodiment, the method further comprises the following steps:

if the current voltage signal is greater than the preset voltage value and/or the current refrigerating time is less than or equal to the preset single refrigerating time, acquiring the current compartment temperature value output by compartment temperature measuring equipment of the refrigerator, and detecting the operation time of the refrigerator;

and if the current compartment temperature value is less than or equal to the preset compartment temperature value and the operation time is longer than the preset operation time, starting the defrosting equipment of the refrigerator.

In one embodiment, the method further comprises the following steps:

if the temperature value of the current compartment is greater than the preset compartment temperature value and/or the operation time length is less than or equal to the preset operation time length, executing the following steps: and acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator.

In one embodiment, before the steps of acquiring the current voltage signal output by the piezoelectric device and detecting the current cooling time of the refrigerator, the method further comprises the steps of:

acquiring the current ambient temperature of ambient temperature measuring equipment of the refrigerator;

acquiring the current environment humidity of environment humidity measuring equipment of a refrigerator;

and calibrating the preset voltage value based on the current environment temperature and the current environment humidity.

A defrosting apparatus for a refrigerator, comprising:

the data acquisition module is used for acquiring a current voltage signal output by the piezoelectric equipment and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and the judgment control module is used for starting the defrosting equipment of the refrigerator if the current voltage signal is less than or equal to the preset voltage value and the current refrigeration time is greater than the preset single refrigeration time.

The control equipment is characterized by comprising an analysis and judgment module and a controller, wherein the analysis and judgment module and the controller realize the steps of the method together.

A refrigerator, including the above-mentioned control equipment, also include the piezo-electric apparatus;

the piezoelectric device is electrically connected with the control device; the piezoelectric device is arranged on an evaporator of the refrigerator;

the piezoelectric device is used for monitoring the thickness of a frost layer on the evaporator and outputting a voltage signal correspondingly, and the voltage signal is transmitted to the control device.

In one embodiment, a piezoelectric device includes a piezoelectric sensor and a conversion circuit;

the piezoelectric sensor is electrically connected with the control equipment through the conversion circuit.

In one embodiment, the device further comprises a compartment temperature measuring device;

the compartment temperature measuring equipment is electrically connected with the control equipment; the compartment temperature measuring equipment is arranged in a refrigerating chamber and a freezing chamber of the refrigerator;

the compartment temperature measuring equipment is used for measuring compartment temperature values in a refrigerating compartment and a freezing compartment of the refrigerator and transmitting the compartment temperature values to the control equipment.

In one embodiment, the system further comprises an environment temperature measuring device and an environment humidity measuring device;

the environment temperature measuring equipment and the environment humidity measuring equipment are respectively and electrically connected with the control equipment;

the environment temperature measuring equipment and the environment humidity measuring equipment are arranged outside the refrigerator;

the environment temperature measuring equipment is used for measuring the environment temperature value of the refrigerator and transmitting the environment temperature value to the control equipment;

the environment humidity measuring device is used for measuring the environment humidity value of the refrigerator and transmitting the environment humidity value to the control device.

A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method.

One of the above technical solutions has the following advantages and beneficial effects:

the defrosting method of the refrigerator provided by the embodiments of the application comprises the following steps: acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; if the current voltage signal is smaller than or equal to the preset voltage value and the current refrigeration time is longer than the preset single refrigeration time, the defrosting equipment of the refrigerator is started, wherein the piezoelectric equipment is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting the voltage signal correspondingly, the frosting condition on the evaporator is monitored in real time, whether the defrosting equipment is started or not is judged according to the frosting condition on the evaporator and the current refrigeration time, the traditional timing defrosting mode is changed, timely defrosting according to the frosting condition is guaranteed, defrosting efficiency is improved, energy saving of the refrigerator is facilitated, the safety performance of the refrigerator is improved, and the service life of the refrigerator is prolonged.

Drawings

Fig. 1 is a schematic flow chart of a defrosting method for a refrigerator provided in an embodiment of the present application.

Fig. 2 is another schematic flow chart of a defrosting method for a refrigerator provided in an embodiment of the present application.

Fig. 3 is a block diagram of a defrosting apparatus of a refrigerator provided in an embodiment of the present application.

Fig. 4 is an internal structural diagram of the control device provided in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of a refrigerator provided in an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In order to solve the technical problem of poor defrosting effect of the conventional refrigerator defrosting technology, in one embodiment, as shown in fig. 1 and 2, a defrosting method for a refrigerator is provided, which includes the following steps:

step S110, acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used to monitor the thickness of the frost layer on the evaporator of the refrigerator and to output a voltage signal.

It should be noted that the defrosting method for the refrigerator can be executed by the control device of the refrigerator.

The piezoelectric device is disposed relative to an evaporator of the refrigerator, for example, on evaporator fins. Under the condition that the refrigerator is not frosted, the voltage signal output by the piezoelectric device is the largest, and the output voltage signal of the piezoelectric device is reduced along with the increase of the thickness of a frosted frost layer of the refrigerator and the more serious the piezoelectric device is extruded by the thickness of the frost layer, so that the frosting condition can be monitored by observing the change of the output voltage signal of the piezoelectric device. The piezoelectric device is electrically connected with the control device, the piezoelectric device detects that the voltage signal is transmitted to the control device, and in order to detect the current frosting condition of the refrigerator, the control device acquires the current voltage signal transmitted by the piezoelectric device. In one example, the piezoelectric device includes a piezoelectric sensor.

The refrigerator adopts a circulating refrigeration mode, under the normal condition, the refrigerator refrigerates according to the preset single refrigeration time (the preset single refrigeration time is the time of a single refrigeration cycle), because the refrigerator frosts, the heat exchange thermal resistance and the air flow resistance are increased, and the convection air flowing through the surface of the evaporator is reduced, the heat exchange coefficient of the surface air side of the evaporator, namely the heat transfer coefficient of the evaporator is reduced, therefore, along with the frosting of the refrigerator, in order to ensure the refrigeration effect of the refrigerator, the refrigeration time can be prolonged by the refrigerator, and the refrigeration time is prolonged along with the thicker frosting, and in order to ensure the energy consumption and the operation safety of the refrigerator, the refrigeration time is taken as one of the factors for judging the defrosting, thereby being beneficial to ensuring the energy consumption, the operation safety and the service life of the refrigerator. The control device detects the current refrigerating time of the refrigerator.

Step S120, if the current voltage signal is less than or equal to the preset voltage value and the current refrigeration time is greater than the preset single refrigeration time, then step S130 is executed: a defrosting apparatus of the refrigerator is started.

It should be noted that the preset voltage value is set according to a safety boundary of the refrigeration efficiency of the refrigerator, that is, the frosting thickness corresponding to the preset voltage value is a boundary of the refrigerator where the refrigeration efficiency is safe, and the frosting thickness is in an abnormal state when the refrigerator is thickened. In the power consumption experiment of the refrigerator, when the power consumption amplitude caused by the thickness state of the frost layer in an idle state is not more than about 10%, the safety boundary is determined.

In one example, the preset voltage value is a safe and fixed voltage value set according to a correspondence between a large number of measured frost thicknesses and the cooling efficiency.

In another example, as shown in fig. 2, before the step of acquiring the current voltage signal output by the piezoelectric device and detecting the current cooling time period of the refrigerator, the method further comprises the steps of:

step S160, acquiring the current ambient temperature of the ambient temperature measuring equipment of the refrigerator; acquiring the current environment humidity of environment humidity measuring equipment of a refrigerator;

step S170, calibrating a preset voltage value based on the current ambient temperature and the current ambient humidity.

It should be noted that, because the ambient temperature and the ambient humidity affect the working load of the refrigerator, the greater the ambient temperature and the ambient humidity is, the greater the working load of the refrigerator is, the faster the frosting speed of the refrigerator is, and the greater the frosting thickness is. According to the method and the device, the current environment temperature measured by the environment temperature measuring equipment of the refrigerator is acquired through the control equipment, the current environment humidity measured by the environment humidity measuring equipment of the refrigerator is acquired, and the preset voltage value is calibrated according to the current environment temperature and the current environment humidity. In one example, the calibration process may calculate a corresponding relationship between the current ambient temperature and the current ambient humidity and the frosting thickness in advance through a large number of tests, and then calibrate the preset voltage value in combination with the corresponding relationship between the frosting thickness and the refrigeration efficiency.

The preset time of single refrigeration is that the refrigerator is factory preset, the frost thickness on the surface of the evaporator increases along with the increase of the frost thickness, the heat exchange resistance and the air flow resistance are increased, the convection air flowing through the surface of the evaporator is reduced, and then the cold quantity conveyed by the circulating refrigeration fan is reduced, so that the actual refrigeration time is longer and longer, the refrigeration efficiency is lower and lower to prevent the refrigeration from losing efficacy, therefore, in order to ensure the operation safety of the refrigerator, the application monitors the current refrigeration time as one of the factors for judging and starting the defrosting equipment.

In one determination result, as shown in fig. 1 and 2, in step S120, when it is monitored that the current voltage signal is less than or equal to the preset voltage value and the current cooling time period is greater than the preset single cooling time period, step S130 is executed: a defrosting apparatus of the refrigerator is started.

In another determination result, as shown in fig. 1 and fig. 2, in step S120, if the current voltage signal is greater than the preset voltage value, and/or the current cooling time length is less than or equal to the preset single cooling time length, step S140 is executed: acquiring a current compartment temperature value output by compartment temperature measuring equipment of the refrigerator, and detecting the operation time of the refrigerator;

step S150, if the current compartment temperature value is less than or equal to the preset compartment temperature value and the operation duration is greater than the preset operation duration, then step S130 is executed: a defrosting apparatus of the refrigerator is started.

It should be noted that, in order to further ensure effective defrosting, another defrosting determination logic is provided when the conditions that the current voltage signal is monitored to be less than or equal to the preset voltage value and the current refrigeration time is not greater than the preset single refrigeration time are not met, that is, the current voltage signal is greater than the preset voltage value and/or the current refrigeration time is less than or equal to the preset single refrigeration time, the current compartment temperature value and the operation time are obtained, wherein the current compartment temperature value is the temperature in the refrigerating compartment or the freezing compartment, and the operation time is the time from the last defrosting.

The preset compartment temperature value is set to ensure the freezing and refrigerating quality of the refrigerator, namely to ensure that the temperature does not rise too high during defrosting, for example, the preset compartment temperature value of the freezing compartment is-18 ℃. The preset operation time is the shortest time when the frost thickness reaches a critical value, namely, a container filled with water is placed in the refrigerator for measurement.

In one determination result, as shown in fig. 1 and fig. 2, in step S150, when the current compartment temperature value is less than or equal to the preset compartment temperature value and the operation duration is greater than the preset operation duration, step S130 is executed: a defrosting apparatus of the refrigerator is started.

In another judgment result, as shown in fig. 1 and fig. 2, in step S150, if the current compartment temperature value is greater than the preset compartment temperature value and/or the operation duration is less than or equal to the preset operation duration, step S110 is executed: and acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator. Namely, the logic for circularly judging the current voltage signal and the current refrigerating time.

In each embodiment of the refrigerator defrosting method, a current voltage signal output by a piezoelectric device is obtained, and the current refrigerating time of the refrigerator is detected; if the current voltage signal is smaller than or equal to the preset voltage value and the current refrigeration time is longer than the preset single refrigeration time, the defrosting equipment of the refrigerator is started, wherein the piezoelectric equipment is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting the voltage signal correspondingly, the frosting condition on the evaporator is monitored in real time, whether the defrosting equipment is started or not is judged according to the frosting condition on the evaporator and the current refrigeration time, the traditional timing defrosting mode is changed, timely defrosting according to the frosting condition is guaranteed, defrosting efficiency is improved, energy saving of the refrigerator is facilitated, the safety performance of the refrigerator is improved, and the service life of the refrigerator is prolonged.

It should be understood that although the various steps in the flow charts of fig. 1-2 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-2 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.

In one embodiment, as shown in fig. 3, there is provided a defrosting apparatus for a refrigerator, including:

the data acquisition module 31 is configured to acquire a current voltage signal output by the piezoelectric device, and detect a current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and the judgment control module 33 is configured to start the defrosting device of the refrigerator if the current voltage signal is less than or equal to the preset voltage value and the current refrigeration time is greater than the preset single refrigeration time.

In one embodiment, further comprising:

the data acquisition module is also used for acquiring the current compartment temperature value output by the compartment temperature measuring equipment of the refrigerator and detecting the operation time of the refrigerator if the current voltage signal is greater than the preset voltage value and/or the current refrigeration time is less than or equal to the preset single refrigeration time;

and the judgment control module is also used for starting the defrosting equipment of the refrigerator if the current compartment temperature value is less than or equal to the preset compartment temperature value and the operation time is longer than the preset operation time.

In one embodiment, further comprising:

the circulation module is used for executing the steps if the temperature value of the current compartment is greater than the preset compartment temperature value and/or the operation time length is less than or equal to the preset operation time length: and acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator.

In one embodiment, further comprising:

the data acquisition module is also used for acquiring the current ambient temperature of the ambient temperature measuring equipment of the refrigerator;

the data acquisition module is also used for acquiring the current environment humidity of the environment humidity measuring equipment of the refrigerator;

and the calibration module is used for calibrating the preset voltage value based on the current environment temperature and the current environment humidity.

For specific limitations of the defrosting apparatus of the refrigerator, reference may be made to the above limitations of the defrosting method of the refrigerator, and no further description is given here. All or part of the modules in the defrosting device of the refrigerator can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a control device is provided, which may be a single chip microcomputer, and the internal structure diagram of the control device may be as shown in fig. 4. The device comprises an analysis and judgment module and a controller. The analysis and judgment module of the control device is used for acquiring a current voltage signal output by the piezoelectric device, detecting the current refrigeration time of the refrigerator, judging whether the current voltage signal is less than or equal to a preset voltage value or not, and judging whether the current refrigeration time is greater than the preset single refrigeration time or not. The controller of the control device controls and starts the defrosting device of the refrigerator, and sets a preset voltage value and a preset single refrigeration time.

It will be appreciated by those skilled in the art that the configuration shown in fig. 4 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation on the control device to which the present application is applied, and a particular control device may include more or less components than those shown in the drawings, or combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:

acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and if the current voltage signal is less than or equal to the preset voltage value and the current refrigeration time is greater than the preset single refrigeration time, starting the defrosting equipment of the refrigerator.

In one embodiment, the processor, when executing the computer program, further performs the steps of:

if the current voltage signal is greater than the preset voltage value and/or the current refrigerating time is less than or equal to the preset single refrigerating time, acquiring the current compartment temperature value output by compartment temperature measuring equipment of the refrigerator, and detecting the operation time of the refrigerator;

and if the current compartment temperature value is less than or equal to the preset compartment temperature value and the operation time is longer than the preset operation time, starting the defrosting equipment of the refrigerator.

In one embodiment, the processor, when executing the computer program, further performs the steps of:

if the temperature value of the current compartment is greater than the preset compartment temperature value and/or the operation time length is less than or equal to the preset operation time length, executing the following steps: and acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator.

In one embodiment, the processor, when executing the computer program, further performs the steps of: before the steps of obtaining the current voltage signal output by the piezoelectric device and detecting the current refrigerating time of the refrigerator, the method further comprises the following steps:

acquiring the current ambient temperature of ambient temperature measuring equipment of the refrigerator;

acquiring the current environment humidity of environment humidity measuring equipment of a refrigerator;

and calibrating the preset voltage value based on the current environment temperature and the current environment humidity.

In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:

acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator; the piezoelectric device is used for monitoring the thickness of a frost layer on an evaporator of the refrigerator and outputting a voltage signal correspondingly;

and if the current voltage signal is less than or equal to the preset voltage value and the current refrigeration time is greater than the preset single refrigeration time, starting the defrosting equipment of the refrigerator.

In one embodiment, the computer program when executed by the processor further performs the steps of:

if the current voltage signal is greater than the preset voltage value and/or the current refrigerating time is less than or equal to the preset single refrigerating time, acquiring the current compartment temperature value output by compartment temperature measuring equipment of the refrigerator, and detecting the operation time of the refrigerator;

and if the current compartment temperature value is less than or equal to the preset compartment temperature value and the operation time is longer than the preset operation time, starting the defrosting equipment of the refrigerator.

In one embodiment, the computer program when executed by the processor further performs the steps of:

if the temperature value of the current compartment is greater than the preset compartment temperature value and/or the operation time length is less than or equal to the preset operation time length, executing the following steps: and acquiring a current voltage signal output by the piezoelectric device, and detecting the current refrigerating time of the refrigerator.

In one embodiment, the computer program when executed by the processor further performs the steps of: before the step of obtaining the current voltage signal output by the piezoelectric device and detecting the current refrigerating time of the refrigerator, the method further comprises the following steps:

acquiring the current ambient temperature of ambient temperature measuring equipment of the refrigerator;

acquiring the current environment humidity of environment humidity measuring equipment of a refrigerator;

and calibrating the preset voltage value based on the current environment temperature and the current environment humidity.

In one embodiment, as shown in fig. 5, there is also provided a refrigerator 50 comprising the above-mentioned control device (not shown in fig. 5), further comprising a piezoelectric device 501;

the piezoelectric device 501 is electrically connected to the control device; the piezoelectric device 501 is provided on the evaporator 503 of the refrigerator 50;

the piezoelectric device 501 is used for monitoring the thickness of the frost layer on the evaporator 503 and outputting a voltage signal, and the voltage signal is transmitted to the control device.

It should be noted that, for details, please refer to the description of each embodiment of the refrigerator defrosting method, and details are not repeated herein.

The piezoelectric device is used for sensing the thickness of frost layers on fins of the evaporator, and the thicker the frost layers are, the more the piezoelectric device is squeezed, the smaller the voltage output by the piezoelectric device is. In one example, a piezoelectric device includes a piezoelectric sensor and a conversion circuit; the piezoelectric sensor is electrically connected with the control equipment through the conversion circuit. The piezoelectric sensor is manufactured by utilizing the piezoelectric effect generated after the surface of a piezoelectric material (such as polycrystalline piezoelectric ceramic) is subjected to the pressure of the thickness of a frost layer.

The piezoelectric sensor is selected according to actual requirements, in one example, the piezoelectric sensor is a dual piezoelectric effect piezoelectric sensor, and comprises a driving piezoelectric sheet and an induction piezoelectric sheet with positive and negative piezoelectric effects, wherein the driving piezoelectric sheet is subjected to the frost thickness pressure on the surface of the evaporator and is converted into corresponding stress strain to drive the main structure to vibrate and transmit the stress strain to the induction piezoelectric sheet at the other end, and the induction piezoelectric sheet converts the strain or deformation into an electric signal according to the positive piezoelectric effect of the piezoelectric material to output. Under the condition of the same frost layer thickness on the surface of the evaporator, the larger the distance between the induction piezoelectric sheet and the driving piezoelectric sheet is, the lower the voltage peak value output by the surface of the induction piezoelectric sheet is. The piezoelectric effect refers to a phenomenon that when a piezoelectric material is deformed (including bending and stretching deformation) under the action of an external force in a certain direction of the thickness of a frost layer formed on the surface of an evaporator, polarization is generated inside the piezoelectric material, and electric charges are generated on the surface of the piezoelectric material.

The piezoelectric sensor transmits a voltage signal generated by the thickness of the frost layer to the control device.

In one embodiment, the device further comprises a compartment thermometry device;

the compartment temperature measuring equipment is electrically connected with the control equipment; the compartment temperature measuring equipment is arranged in a refrigerating chamber and a freezing chamber of the refrigerator;

the compartment temperature measuring equipment is used for measuring compartment temperature values in a refrigerating compartment and a freezing compartment of the refrigerator and transmitting the compartment temperature values to the control equipment.

It should be noted that, compartment temperature measuring devices are respectively arranged in the refrigerating compartment and the freezing compartment of the refrigerator, the temperatures in the refrigerating compartment and the freezing compartment are respectively monitored, and the refrigerating compartment and the freezing compartment are respectively defrosted according to the measured compartment temperature values. In one example, the compartment thermometry apparatus includes a temperature sensor and processing circuitry, the temperature sensor being electrically connected to the controller through the processing circuitry.

In one embodiment, the device further comprises an environment temperature measuring device and an environment humidity measuring device;

the environment temperature measuring equipment and the environment humidity measuring equipment are respectively and electrically connected with the control equipment;

the environment temperature measuring equipment and the environment humidity measuring equipment are arranged outside the refrigerator;

the environment temperature measuring equipment is used for measuring the environment temperature value of the refrigerator and transmitting the environment temperature value to the control equipment;

the environment humidity measuring device is used for measuring the environment humidity value of the refrigerator and transmitting the environment humidity value to the control device.

It should be noted that, in order to better monitor the operation load of the refrigerator, the environment temperature measuring device and the environment humidity measuring device are disposed outside the frost to measure the environment temperature value and the environment humidity value respectively, and transmit the environment temperature value and the environment humidity value to the control device respectively, so that the control device calibrates the preset voltage value according to the environment temperature value and the environment humidity value. In one example, an ambient temperature measurement device includes a temperature sensor and ambient temperature processing circuitry, the temperature sensor being electrically connected to a controller through the processing circuitry. In one example, the environmental hygrometric device includes a humidity sensor and a humidity processing circuit, the humidity sensor being electrically connected to the controller through the humidity processing circuit.

In the embodiments of the refrigerator, the piezoelectric device for monitoring the thickness of the frost layer in real time is arranged in the refrigerator, so that defrosting can be timely realized, the energy consumption of the refrigerator is reduced, the safety performance of the refrigerator is improved, and the service life is prolonged.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.