Evaporator defrosting method, device and refrigerator

Abstract

The present application discloses an evaporator defrosting method, device and refrigerator. The evaporator defrosting method is applied to a refrigerator. A resistance stress sheet is arranged in the freezer compartment of the refrigerator. The evaporator defrosting method obtains the resistance value of the resistance stress sheet and obtains the corresponding frost weight in the freezer compartment according to the resistance value. When the frost weight is greater than the preset weight, the defrost heater in the refrigerator is controlled to start to defrost the evaporator. In the present application, the frost condition in the refrigerator can be directly obtained through the resistance stress sheet, so as to realize the defrosting control of the refrigerator according to the frost condition, thereby alleviating the influence of the excessively thick frost layer on the refrigeration effect and energy consumption of the refrigerator.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerators, and in particular to an evaporator defrosting method, device and refrigerator. Background Art

[0002] During the operation of the refrigerator, the air humidity in the freezer is relatively high, but the evaporator temperature of the refrigerator is relatively low. Therefore, when the water vapor in the freezer condenses on the inner wall of the refrigerator, it will slowly condense into ice, and finally the ice layer will become thicker and thicker.

[0003] Traditional refrigerators mainly use temperature sensors and refrigerator operating time to indirectly determine the frost condition of the refrigerator. However, this control method cannot understand the frost condition inside the refrigerator in real time, which can easily lead to excessive frost and affect the refrigeration effect and energy consumption. Summary of the invention

[0004] The present application provides an evaporator defrosting method, device and refrigerator, which can effectively alleviate the current problem of being unable to understand the frosting situation in real time, resulting in excessive frosting and affecting the refrigeration effect and energy consumption.

[0005] The present application provides an evaporator defrosting method, which is applied to a refrigerator, wherein a resistance stress sheet is arranged in the freezing chamber of the refrigerator; the evaporator defrosting method comprises:

[0006] Obtaining the resistance value of the resistance stress sheet, and obtaining the corresponding frost weight in the freezing chamber according to the resistance value;

[0007] When the frosting weight is greater than the preset weight, the defrost heater in the refrigerator is controlled to start to defrost the evaporator.

[0008] In some embodiments of the evaporator defrosting method, the steps of obtaining the resistance value of the resistance stress sheet and obtaining the corresponding frost weight in the freezing chamber according to the resistance value include:

[0009] Obtaining a resistance value at a first preset time interval, and obtaining a corresponding frosting weight according to the resistance value;

[0010] Get the number of acquisitions of the resistance value;

[0011] When the number of acquisitions is greater than the preset number and the resistance value acquired each time is greater than the preset weight, it is determined that the frosting weight is greater than the preset weight.

[0012] In some embodiments of the evaporator defrosting method, the steps of obtaining the resistance value of the resistance stress sheet and obtaining the corresponding frost weight in the freezing chamber according to the resistance value include:

[0013] Obtaining a resistance value at a first preset time interval, and obtaining a corresponding frosting weight according to the resistance value;

[0014] When a plurality of frosting weights acquired within the second preset time are all greater than the preset weight, it is determined that the frosting weight is greater than the preset weight; wherein the second preset time is greater than the first preset time.

[0015] In some embodiments, the evaporator defrosting method further includes:

[0016] When the frost weight is not greater than the preset weight, the defrost heater is kept in the off state.

[0017] In some embodiments, the evaporator defrosting method further comprises, after controlling the defrost heater to turn on:

[0018] Within the third preset time, obtaining the frosting weight corresponding to the resistance value every first preset time;

[0019] When the plurality of frost weights acquired within the third preset time gradually decreases, the defrost heater is controlled to stop working.

[0020] In some embodiments, the evaporator defrosting method further comprises, after controlling the defrost heater to turn on:

[0021] Get the working time of the defrost heater after it is started;

[0022] When the working time of the defrost heater is greater than the fourth preset time, an alarm prompt message is output; and the fourth preset time is greater than the third preset time.

[0023] The embodiment of the present application also provides an evaporator defrosting method, which is applied to a refrigerator, wherein a resistance stress sheet is arranged in the freezing chamber of the refrigerator; the evaporator defrosting method comprises:

[0024] Obtaining the electrical conductivity of the resistance stress sheet, and obtaining the corresponding frost thickness in the freezing chamber according to the electrical conductivity;

[0025] When the frost thickness is greater than a preset thickness, the defrost heater in the refrigerator is controlled to start to defrost the evaporator.

[0026] In some embodiments, the evaporator defrosting method further includes:

[0027] A preset mapping relationship between the electrical conductivity of the resistance stress sheet and the frost thickness is pre-stored.

[0028] The embodiment of the present application further provides an evaporator defrosting device, the evaporator defrosting device comprising:

[0029] A resistance stress sheet, the resistance stress sheet is arranged in the freezer compartment of the refrigerator;

[0030] Defrost heater, which is used to defrost the evaporator after startup;

[0031] The controller is electrically connected to the resistance stress sheet and the defrost heater. The controller is used to obtain the resistance value of the resistance stress sheet and obtain the corresponding frost weight in the freezer according to the resistance value. When the frost weight is greater than the preset weight, the defrost heater in the refrigerator is controlled to start to defrost the evaporator.

[0032] An embodiment of the present application also provides a refrigerator, which includes the above-mentioned evaporator defrosting device.

[0033] The present application provides an evaporator defrosting method, device and refrigerator. The evaporator defrosting method obtains the resistance value of a resistance stress sheet and obtains the corresponding frost weight in the freezer according to the resistance value. When the frost weight is greater than a preset weight, the defrost heater in the refrigerator is controlled to start to defrost the evaporator. In the present application, the frost condition in the refrigerator can be directly obtained through the resistance stress sheet, so as to realize defrosting control of the refrigerator according to the frost condition, thereby alleviating the influence of too thick frost layer on the refrigeration effect and energy consumption of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0035] Figure 1 This is a schematic flow chart of the first embodiment of the evaporator defrosting method provided in the embodiments of the present application.

[0036] Figure 2 This is a schematic flow chart of a first embodiment of step 100 in the evaporator defrosting method provided in an embodiment of the present application.

[0037] Figure 3 This is a schematic diagram of a second embodiment of step 100 in the evaporator defrosting method provided in an embodiment of the present application.

[0038] Figure 4 This is a schematic flow chart of the second embodiment of the evaporator defrosting method provided in the embodiment of the present application.

[0039] Figure 5 This is a schematic flow chart of the third embodiment of the evaporator defrosting method provided in the embodiment of the present application.

[0040] Figure 6 This is a schematic flow chart of a fourth embodiment of the evaporator defrosting method provided in an embodiment of the present application.

[0041] Figure 7 This is a structural block diagram of the first embodiment of the evaporator defrost device provided in the embodiments of the present application.

[0042] Figure 8This is a structural block diagram of the second embodiment of the evaporator defrost device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. The features specified as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0045] See also Figure 1 This embodiment provides an evaporator defrosting method, which is applied to a refrigerator; wherein a resistance stress sheet is provided in the freezer compartment of the refrigerator, and the resistance stress sheet is a sensor element used to measure the stress condition of an object, and the stress condition of the material is monitored and analyzed by converting the strain signal into a resistance change. The evaporator defrosting method in this embodiment includes:

[0046] 100. Obtaining a resistance value of the resistance stress sheet, and obtaining a corresponding frost weight in the freezing chamber according to the resistance value;

[0047] 200. When the frost weight is greater than the preset weight, the defrost heater in the refrigerator is controlled to start to defrost the evaporator.

[0048] In the present application, a resistance stress sheet is set in the freezer compartment of the refrigerator, and the resistance stress sheet is used to convert the frost weight into a resistance signal. Conversely, the corresponding frost weight in the freezer compartment can be obtained by obtaining the resistance value of the resistance stress sheet in real time, thereby directly detecting the frost condition in the refrigerator in real time. After obtaining the frost weight, it is determined whether the frost weight is greater than the preset weight. If the frost weight is less than or equal to the preset weight, the defrost heater is maintained in the off state; when the frost weight is greater than the preset weight, it indicates that the frost in the freezer compartment is too thick, so the defrost heater in the refrigerator is controlled to start to defrost the evaporator, thereby alleviating the influence of the thick frost layer on the refrigeration effect and energy consumption of the refrigerator.

[0049] See also Figure 2 In some embodiments, the steps of step 100 specifically include:

[0050] 110. Obtain a resistance value at a first preset time interval, and obtain a corresponding frosting weight according to the resistance value;

[0051] 120. Get the number of times the resistance value is collected;

[0052] 130. When the number of collection times is greater than the preset number and the resistance value obtained each time is greater than the preset weight, it is determined that the frosting weight is greater than the preset weight.

[0053] In this embodiment, when obtaining the resistance value of the resistance stress sheet, the resistance value is obtained every first preset time. For example, the first preset time can be 1 minute. Of course, other times can be set according to actual needs, and this embodiment is not limited to this. When the frosting weight obtained continuously according to the resistance value is greater than the preset weight, it is determined that the resistance value corresponding to the frosting weight is greater than the preset weight. In this embodiment, the frosting weight is obtained multiple times for comparison, so as to improve the accuracy of judging the frosting weight, thereby improving the accuracy of defrosting control.

[0054] See also Figure 3 In some other embodiments, step 100 specifically includes:

[0055] 101. Obtaining a resistance value at a first preset time interval, and obtaining a corresponding frosting weight according to the resistance value;

[0056] 102. When multiple frosting weights obtained within the second preset time are all greater than the preset weight, it is determined that the frosting weight is greater than the preset weight; wherein the second preset time is greater than the first preset time.

[0057] Compared with the counting method, in this embodiment, a plurality of frosting weights can also be obtained by timing. If the plurality of frosting weights obtained within a certain period of time are all greater than the preset weight, it is determined that the frosting load at this time is greater than the preset weight, and then the defrosting heater is subsequently controlled to start and defrost. In this embodiment, by obtaining a plurality of frosting weights within a continuous period of time for comparison, the accuracy of judging the frosting weight can be improved, thereby improving the accuracy of defrosting control.

[0058] See also Figure 4 In some embodiments, step 200 further includes:

[0059] 300. Within the third preset time, obtain the frosting weight corresponding to the resistance value every first preset time;

[0060] 400. When the plurality of frost weights obtained within the third preset time gradually decreases, the defrost heater is controlled to stop working.

[0061] That is, within the third preset time after the defrost heater is turned on, the resistance value of the resistance stress sheet will continue to be obtained. By comparing the frost weights corresponding to the multiple resistance values ​​obtained within the third preset time, the defrosting process of the evaporator after the defrost heater is turned on can be monitored. For example, if the multiple frost weights are gradually decreasing over time, it means that the ice layer on the inner wall of the freezer is gradually melting. At this time, the defrost heater can be controlled to stop working to avoid the continuous operation of the defrost heater and consume electricity, thereby improving the reliability of the refrigerator. After turning off the defrost heater, it is not necessary to start the compressor immediately to work, but the compressor can be turned on with a delay, waiting for the ice layer to melt and drip.

[0062] See also Figure 5 In some embodiments, step 300 further includes:

[0063] 500. Get the working time of the defrost heater after it is started;

[0064] 600. When the working time of the defrost heater is greater than the fourth preset time, an alarm prompt message is output; and the fourth preset time is greater than the third preset time.

[0065] In this embodiment, after the defrost heater is started, the working time of the defrost heater is also monitored; if the defrost heater continues to work for too long, it is possible that when the ice layer on the inner wall of the freezing layer has melted, the defrost heater is still working, that is, the fourth preset time in this embodiment is greater than the third preset time, for example, the fourth preset time is 90 minutes, which means that the continuous operation of the defrost heater is abnormal. Therefore, when the defrost heater is still not turned off after the fourth preset time, a corresponding alarm prompt message will be output to prompt the maintenance.

[0066] In some embodiments, the evaporator defrosting method further includes: pre-storing the mapping relationship between the frosting weight and the frosting thickness. In this embodiment, a mathematical model between the frosting weight and the frosting thickness can be established in advance according to the changing trend of the frosting weight. Then, when the refrigerator is used in the subsequent application, the frosting thickness value can be obtained according to the frosting weight, thereby realizing the monitoring of the frosting thickness. For example, the relationship between the frosting weight and the frosting thickness is such as y=0.01x+0.5, where x is the frosting thickness and y is the frosting weight. When it is detected that the frosting weight is greater than 300g, it is judged that the frosting is serious, and then the defrosting heater is controlled to turn on. If the data of the frosting thickness is needed, it can be obtained according to the pre-stored mapping relationship between the frosting weight and the frosting thickness, thereby directly understanding the frosting situation, which is beneficial to the subsequent defrosting control.

[0067] See also Figure 6 The embodiment of the present application also provides an evaporator defrosting method, the defrosting method comprising:

[0068] 10. Obtain the conductivity of the resistance stress sheet, and obtain the corresponding frost thickness in the freezing chamber according to the conductivity;

[0069] 20. When the frost thickness is greater than the preset thickness, the defrost heater in the refrigerator is controlled to start to defrost the evaporator.

[0070] In this application, the conductivity of the resistance stress sheet is obtained, and the frost thickness under the corresponding conductivity is obtained according to the mapping relationship between the conductivity and the frost thickness. After the frost thickness is obtained, it is determined whether the frost thickness is greater than the preset thickness. If the frost thickness is less than or equal to the preset thickness, the defrost heater is kept in the off state; if the frost thickness is greater than the preset thickness, such as the frost thickness is greater than 40mm, it indicates that the frost is serious at this time, and then the defrost heater is controlled to start, thereby alleviating the influence of the excessively thick frost layer on the refrigeration effect and energy consumption of the refrigerator.

[0071] In some embodiments, the evaporator defrosting method further includes: 30. Pre-storing a preset mapping relationship between the conductivity of the resistance stress sheet and the frost thickness. In this embodiment, a mathematical model between the conductivity and the frost thickness can be established in advance according to the change trend of the conductivity of the resistance stress sheet. Then, in the subsequent refrigerator application, the frost thickness value can be directly obtained according to the conductivity, thereby realizing the monitoring of the frost thickness. For example, the relationship between the conductivity and the frost thickness is y=0.005x+0.1, where x is the frost thickness and y is the conductivity. When the frost thickness is detected to be greater than 40mm, it is judged that the frost is serious, and then the defrost heater is controlled to turn on.

[0072] See also Figure 7 The embodiment of the present application also provides an evaporator defrost device, which includes a resistance stress sheet 11, a defrost heater 12 and a controller 13. The resistance stress sheet 11 is arranged in the freezer compartment of the refrigerator, and the controller 13 is electrically connected to the resistance stress sheet 11 and the defrost heater 12 respectively.

[0073] Among them, the defrost heater 12 is used to defrost the evaporator after startup, and the controller 13 is used to obtain the resistance value of the resistance stress sheet 11, and obtain the corresponding frost weight in the freezer according to the resistance value. When the frost weight is greater than the preset weight, the defrost heater 12 in the refrigerator is controlled to start to defrost the evaporator.

[0074] In the present application, a resistance stress sheet 11 is arranged in the freezer compartment of the refrigerator, and the resistance stress sheet 11 is used to convert the frost weight into a resistance signal. Conversely, the corresponding frost weight in the freezer compartment can be obtained by obtaining the resistance value of the resistance stress sheet 11 in real time, thereby directly detecting the frost condition in the refrigerator in real time. After obtaining the frost weight, it is determined whether the frost weight is greater than the preset weight. If the frost weight is less than or equal to the preset weight, the defrost heater 12 is maintained in the off state; when the frost weight is greater than the preset weight, it indicates that the frost in the freezer compartment is too thick, so the defrost heater 12 in the refrigerator is controlled to start to defrost the evaporator, thereby alleviating the influence of the thick frost layer on the refrigeration effect and energy consumption of the refrigerator.

[0075] See also Figure 8 In some embodiments, the evaporator defrost device also includes an alarm device 14, which is connected to the controller 13; the controller 13 is also used to obtain the working time of the defrost heater 12 after the defrost heater 12 is turned on, and when the working time of the defrost heater 12 is greater than the preset time, the alarm device 14 is controlled to output an alarm prompt message.

[0076] In this embodiment, after the defrost heater 12 is started, the working time of the defrost heater 12 is also monitored; if the defrost heater 12 continues to work for too long, it is possible that when the ice layer on the inner wall of the freezing layer is completely melted, the defrost heater 12 is still working, that is, the fourth preset time in this embodiment is greater than the third preset time, for example, the fourth preset time is 90 minutes, which means that the continuous operation of the defrost heater 12 is abnormal. Therefore, when the defrost heater 12 is still not turned off after being turned on for the fourth preset time, a corresponding alarm prompt message will be output to prompt the maintenance.

[0077] An embodiment of the present application further provides a refrigerator, which includes the above-mentioned evaporator defrost device. Since the evaporator defrost device is described in detail above, it will not be repeated here.

[0078] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0079] The evaporator defrosting method provided in the embodiments of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An evaporator defrosting method, characterized in that: The evaporator defrosting method is applied to a refrigerator, wherein a resistance stress sheet is arranged in the freezing chamber of the refrigerator; The evaporator defrosting method comprises: Obtaining a resistance value of the resistance stress sheet, and obtaining a corresponding frost weight in the freezing chamber according to the resistance value; When the frosting weight is greater than a preset weight, the defrosting heater in the refrigerator is controlled to start so as to defrost the evaporator.

2. The evaporator defrosting method according to claim 1, characterized in that: The step of obtaining the resistance value of the resistance stress sheet and obtaining the corresponding frost weight in the freezing chamber according to the resistance value comprises: Acquire the resistance value at a first preset time interval, and obtain the corresponding frosting weight according to the resistance value; Obtaining the number of acquisitions of the resistance value; When the number of acquisitions is greater than a preset number and the frosting weight acquired each time is greater than the preset weight, it is determined that the frosting weight is greater than the preset weight.

3. The evaporator defrosting method according to claim 1, characterized in that: The step of obtaining the resistance value of the resistance stress sheet and obtaining the corresponding frost weight in the freezing chamber according to the resistance value comprises: Acquire the resistance value at a first preset time interval, and obtain the corresponding frosting weight according to the resistance value; When the plurality of frosting weights acquired within the second preset time are all greater than the preset weight, it is determined that the frosting weight is greater than the preset weight; wherein the second preset time is greater than the first preset time.

4. The evaporator defrosting method according to claim 2 or 3, characterized in that: The evaporator defrosting method further comprises: When the frosting weight is not greater than the preset weight, the defrosting heater is maintained in an off state.

5. The evaporator defrosting method according to claim 2 or 3, characterized in that: After the controlling the defrost heater to be turned on, the method further includes: Within a third preset time, obtaining the frosting weight corresponding to the resistance value every the first preset time; When the plurality of frost weights obtained within the third preset time gradually decrease, the defrost heater is controlled to stop working.

6. The evaporator defrosting method according to claim 5, characterized in that: After the controlling the defrost heater to be turned on, the method further includes: Obtaining the working time of the defrost heater after it is started; When the working time of the defrost heater is greater than a fourth preset time, an alarm prompt message is output; and the fourth preset time is greater than the third preset time.

7. An evaporator defrosting method, characterized in that: The evaporator defrosting method is applied to a refrigerator, wherein a resistance stress sheet is arranged in the freezing chamber of the refrigerator; The evaporator defrosting method comprises: Obtaining the electrical conductivity of the resistance stress sheet, and obtaining the corresponding frost thickness in the freezing chamber according to the electrical conductivity; When the frost thickness is greater than a preset thickness, the defrost heater in the refrigerator is controlled to start so as to defrost the evaporator.

8. The evaporator defrosting method according to claim 7, characterized in that: The evaporator defrosting method further comprises: A preset mapping relationship between the electrical conductivity of the resistance stress sheet and the frost thickness is pre-stored.

9. An evaporator defrosting device, characterized in that: include: A resistance stress sheet, wherein the resistance stress sheet is arranged in the freezer compartment of the refrigerator; A defrost heater, the defrost heater is used to defrost the evaporator after startup; A controller is electrically connected to the resistance stress sheet and the defrost heater, and is used to obtain the resistance value of the resistance stress sheet, and obtain the corresponding frost weight in the freezer compartment according to the resistance value, and when the frost weight is greater than a preset weight, the defrost heater in the refrigerator is controlled to start so as to defrost the evaporator.

10. A refrigerator, characterized in that: The refrigerator includes the evaporator defrost device according to claim 9.

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