TWI723831B - Refrigerator storage capacity detection method and refrigerator implementing the method - Google Patents

Abstract

A method for detecting the storage capacity of a refrigerator is executed by a refrigerator and includes the following steps: (A) The control unit of the refrigerator causes the top side light-emitting unit to emit light, and at least one of the first side light-sensing unit and the second side light-sensing unit detects Light intensity, and the control unit stores a top side illuminance value; (B) The control unit makes the first side light-emitting unit emit light, the first side light-sensing unit detects the light intensity, and the control unit stores the first side illuminance value (C) The control unit makes one of the first side light-emitting unit and the second side light-emitting unit emit light, and one of the first side light-emitting unit and the second side light-emitting unit on the opposite side of the light-emitting side measures light Intensity, and the control unit stores a door back compensation illuminance value; (D) the control unit sets a change threshold according to the door back compensation illuminance value; (E) the control unit depends on at least one of the top side illuminance value and the first side illuminance value Compared with the change of the previous detection value, it is determined whether the change is greater than the change threshold.

Description

Refrigerator storage capacity detection method and refrigerator implementing the method

The invention relates to a detection method and a refrigerator, in particular to a detection method of the storage capacity of a refrigerator and a refrigerator for executing the method.

Refrigerators are an indispensable product in most people's lives today, and can provide food preservation effects through the low-temperature environment of the refrigerator and freezer. Since the refrigerating room and freezing room of the refrigerator must be kept at low temperature continuously, a large amount of electric energy will be consumed after long-term use, which belongs to household appliances with high power consumption. In the current trend of advocating energy saving and carbon reduction, most businesses will strengthen the energy-saving design of refrigerators for energy consumption. The energy-saving design of refrigerators is divided into many types based on different principles. One of them is to set the corresponding operation mode according to the food storage capacity in the refrigerator, in order to achieve the effect of both food preservation and energy saving. However, the existing refrigerator storage capacity detection method may still affect the accuracy of the detection result due to various factors, and there is room for improvement.

Therefore, one of the objectives of the present invention is to provide a refrigerator storage capacity detection method that can solve the aforementioned problems.

Therefore, the refrigerator storage capacity detection method of the present invention is executed by a refrigerator in some embodiments. The refrigerator includes a cabinet, a door, a control unit, and a storage capacity detection system. The cabinet defines a storage room. The storage capacity detection system is arranged in the storage room and adjacent to the door, and includes a top side light emitting unit arranged on the top side of the storage room, and a first side light emitting unit arranged on a first side of the storage room Unit, a first side light-sensing unit arranged on the first side and longitudinally spaced apart from the first side light-emitting unit, a second side light-emitting unit arranged on a second side of the storage room, and A second side light-sensing unit arranged on the second side and longitudinally spaced apart from the second side light-emitting unit, the storage amount detection method includes the following steps: (A) the control unit makes the top side light-emitting unit emit light, At least one of the first side light-sensing unit and the second side light-sensing unit detects light intensity while the top-side light-emitting unit is emitting light, and the control unit stores a corresponding top-side illuminance value; (B) The control unit makes the first side light-emitting unit emit light, and the first side light-sensing unit detects the light intensity during the light-emitting period of the first side light-emitting unit, and the control unit stores a corresponding first side illuminance Value; (C) the control unit makes one of the first side light-emitting unit and the second side light-emitting unit emit light, and the first side light-emitting unit and the second side light-emitting unit are positioned opposite to each other The one on the side detects the light intensity during the light-emitting period, and the control unit stores a corresponding door back compensation illuminance value; (D) the control unit sets a change threshold according to the door back compensation illuminance value; and (E) The control unit determines whether the change amount is greater than the change threshold value according to the change amount of at least one of the top side illuminance value and the first side illuminance value compared to the previous detection value.

In some implementation aspects, the first side and the second side are located on opposite sides; before the step (B) or the step (C), it further includes: step (F) the control unit makes the second side The light-emitting unit emits light, the second side light-sensing unit detects the light intensity during the light-emitting period of the second side light-emitting unit, and the control unit stores a corresponding second side illuminance value; in step (E), the control The unit determines whether the change is greater than the change threshold according to the change of at least one of the top side illuminance value, the first side illuminance value, and the second side illuminance value compared to the previous detection value.

In some embodiments, the refrigerator further includes a refrigeration unit for adjusting the temperature of the storage compartment; after step (E), it further includes: step (G), the control unit according to the judgment result of step (E) , Set the operation mode of the refrigeration unit.

In some implementations, the first side light-emitting unit and the second side light-sensing unit are located at different longitudinal heights relative to the door, and the second side light-emitting unit and the first side light-sensing unit are opposite to each other. The door body is located at different longitudinal heights.

Another object of the present invention is to provide a refrigerator capable of implementing the aforementioned problems.

Therefore, in some embodiments, the refrigerator of the present invention includes: a box body defining a storage room; a door body that can be opened and closed on the box body; a control unit provided on the box body; a uniform cooling unit, Installed in the box and controlled by the control unit to adjust the temperature of the storage room; and a storage capacity detection system, including a top-side light-emitting unit installed on the top side of the storage room, and one installed in the storage room A first side light-emitting unit on the first side, a first side light-sensing unit arranged on the first side and longitudinally spaced from the first side light-emitting unit, and a first side light-emitting unit arranged on the storage room Two side second side light-emitting units, and a second side light-sensing unit arranged on the second side and longitudinally spaced apart from the second side light-emitting unit. Wherein, the control unit can make the top side light-emitting unit emit light, and at least one of the first side light-emitting unit and the second side light-emitting unit detects the light intensity during the light-emitting period of the top side light-emitting unit, and the The control unit stores a corresponding top-side illuminance value; the control unit can make the first side light-emitting unit emit light, and the first side light-sensing unit detects the light intensity during the light-emitting period of the first side light-emitting unit, and The control unit stores a corresponding first side illuminance value; the control unit can cause one of the first side light-emitting unit and the second side light-emitting unit to emit light, and the first side light-sensing unit and the The one on the opposite side of the second side photosensitive unit detects the light intensity during the light-emitting period, and the control unit stores a corresponding door back compensation illuminance value; the control unit can set according to the door back compensation illuminance value A change threshold; the control unit can determine whether the change is greater than the change threshold according to the change of at least one of the top side illuminance value and the first side illuminance value compared to the previous detection value.

In some embodiments, the control unit can also cause the second side light-emitting unit to emit light, and the second side light-sensing unit detects the light intensity during the period when the second side light-emitting unit emits light, and the control unit A corresponding second side illuminance value is stored; the control unit also determines whether the change amount is greater than the change threshold value according to the second side illuminance value.

In some embodiments, the first side light-emitting unit and the second side light-emitting unit are located in the upper half of the storage room, and the first side light-sensing unit and the two side light-emitting units are located in the upper half of the storage room. The bottom half.

In some implementations, the first side light-emitting unit and the second side light-sensing unit are located at different longitudinal heights relative to the door, and the second side light-emitting unit and the first side light-sensing unit are opposite to each other. The door body is located at different longitudinal heights.

In some embodiments, the refrigerator further includes a shelf structure including at least one storage room shelf arranged in the storage room and at least one door back shelf arranged in the door body; the top side The light-emitting unit has at least one top-side light-emitting diode located on the storage room shelf and the door-back shelf, and the first side light-emitting unit has a top-side light-emitting diode located on the storage room shelf and the door-back shelf The first side light-emitting diode, the second side light-emitting unit has a second side light-emitting diode on the storage room shelf and the door back shelf; the first side light-sensing unit And the second side photosensitive unit is located under the storage room shelf and the door back shelf.

The present invention has at least the following effects: through the setting of the storage quantity detection system, the multiple execution steps of the storage quantity detection method cooperate with each other, which can reduce the detection result error caused by factors such as food placement position, and thus can effectively improve the detection result The accuracy of the refrigerator allows the refrigerator to execute an appropriate operation mode according to the judgment result of the storage capacity, thereby improving the energy utilization efficiency and avoiding unnecessary energy consumption.

1 to 3, which are an embodiment of a refrigerator storage capacity detection method of the present invention and a refrigerator 100 for implementing the method. In the figure, the refrigerator 100 is an example of a multi-door refrigerator. However, in practical applications, the refrigerator 100 may be any type of refrigerator, and is not limited to a multi-door refrigerator.

The refrigerator 100 includes a cabinet 1, a plurality of doors 2, a shelf structure 3, a control unit 4, a uniform cooling unit 5, a door sensing unit 6, a lighting unit 7 and a storage capacity detection system 8.

The box 1 can provide heat insulation and define a plurality of storage compartments 11 for storing food. This embodiment uses the storage compartment 11 on the top side as an illustration. The doors 2 are installed on the box 1 in an openable and closable manner to close the fetching openings of the storage compartments 11. In FIG. 1, two doors 2 that are split on the left and right are shown as an example. The scaffold structure 3 includes at least one storage room scaffold 31 arranged in the storage room 11 and at least one door back scaffold 32 arranged at the door body 2. In this embodiment, each of the two uses multiple examples. . The control unit 4 is arranged at the cabinet 1 and is the operation control center of the refrigerator 100, which can be realized by various microcontrollers, control chips, and control circuits. The refrigeration unit 5 is arranged at the box body, and contains components such as compressors, condensers, evaporators, capillaries, fan blades, etc. not shown in the figure, and the storage chambers 11 can be adjusted under the control of the control unit 4 The ambient temperature in the The door sensing unit 6 is arranged at the doors 2 of the box 1 and can be controlled by the control unit 4 to detect the opening and closing states of the doors 2. The lighting unit 7 is arranged in the storage room 11 and has one or more light sources, which will correspondingly start to emit light after the doors 2 are opened, and will automatically close after the doors 2 are closed, To provide users with the light needed to view food.

The storage capacity detection system 8 includes a top side light-emitting unit 81 arranged on the top side of the storage room 11, a first side light-emitting unit 82 arranged on a first side of the storage room 11, and a first side light-emitting unit 82 arranged on the top side of the storage room 11. A first side light-sensing unit 83 on the first side and longitudinally spaced apart from the first side light-emitting unit 82, a second side light-emitting unit 84 arranged on a second side of the storage compartment 11, and a set The second side light-sensing unit 85 is located on the second side and longitudinally spaced from the second side light-emitting unit 84. In the example of FIG. 1, the first side and the second side are respectively located on the left and right sides of the storage compartment 11, that is, they are located on opposite sides, but the implementation is not limited to this aspect.

According to the implementation aspect of this embodiment, the first side light-emitting unit 82 and the second side light-emitting unit 84 are located in the upper half of the storage compartment 11, the first side light-sensing unit 83 and the second side light-emitting unit 83 The light-sensing unit 85 is located in the lower half of the storage compartment 11; the first side light-emitting unit 82 and the second side-detecting light-sensing unit 85 are located at different longitudinal heights relative to the door body 2, and the second side light-emitting unit 84 and the first side photosensitive unit 83 are located at different longitudinal heights relative to the door 2.

More specifically, in this embodiment, the top-side light-emitting unit 81 has two shelves located on the storage room shelf 31 and the door-back shelf 32 and correspond to the first side and the second side respectively. The top side light emitting diode 811, the first side light emitting unit 82 has a first side light emitting diode 821 on the storage room shelf 31 and the door back shelf 32, the first side light emitting diode 821 The two side light-emitting units 84 have a second side light-emitting diode 841 located on the storage room shelves 31 and the door-back shelves 32, and the first side light-sensing unit 83 has a second side light-emitting diode 841 located on the storage room shelves 31 and the door-back shelves 32. The storage room shelf 31 and the first side light sensor 831 under the door back shelf 32, the second side photosensitive unit 85 has a storage room shelf 31 and the door back shelf The second side light sensor 851 under the frame 32. The top side light emitting diodes 811, the first side light emitting diode 821, and the second side light emitting diode 841 are, for example, white light emitting diodes. The first side light sensor 831, The second side light sensor 851 is, for example, a photodiode, and can detect the top side light-emitting diodes 811, the first side light-emitting diode 821, and the second side light-emitting diode The direct light emitted by 841 or the reflected light in the storage room 11. Through the configuration of the above-mentioned components, it can be used to realize the storage capacity detection method of the present invention, which is described as follows.

Referring to the flowchart of FIG. 3, the following describes the detection method and related operation methods of the refrigerator 100 for automatically detecting the storage capacity.

First, the control unit 4 judges the opening and closing states of the doors 2 according to the detection result of the door sensing unit 6. When the doors 2 are opened by the user and subsequently closed, the lighting unit 7 will be closed, and then the storage amount detection system 8 will be in a dark environment in the storage room 11, according to the control unit 4 The instruction to start the storage volume detection program.

In step S1, the control unit 4 causes the top-side light-emitting unit 81 to start emitting light, and at least one of the first side-side light-sensing unit 83 and the second side-side light-sensing unit 85 detects the light intensity during the light-emitting period, and is determined by The control unit 4 stores a corresponding top side illuminance value. In an implementation aspect, the two top-side light-emitting diodes 811 of the top-side light-emitting unit 81 emit light at the same time within a certain period of time according to a preset light intensity, and the first side-side light-sensing unit 83 and the second side light-emitting unit 83 and the second side light-emitting diode 811 emit light at the same time. The two side photosensitive units 85 simultaneously generate corresponding top-side illuminance values based on the light intensity detection results and send them back to the control unit 4, and the control unit 4 stores the aforementioned top-side illuminance values. According to actual needs, the above process can also be performed by only one of the first side photosensitive unit 83 and the second side photosensitive unit 85 for light intensity detection, or by the first side photosensitive unit 83 and the second side photosensitive unit 85. The second side photosensitive unit 85 performs light intensity detection in stages. In addition, when the number of the top-side light-emitting diodes 811 is one or more than two, the detection of the top-side illuminance value can also be performed in a similar manner as described above.

When there is no food in the storage room 11, most of the light emitted by the top-side light-emitting diodes 811 penetrates the storage room shelf 31 and the door-back shelf 32, and in the storage room The interior of the chamber 11 is constantly reflecting, and will not be blocked, absorbed or reflected by the stored food. Therefore, the direct light detected by the first side photosensitive unit 83 and the second side photosensitive unit 85 when no food is stored The light intensity of light or reflected light is the strongest. When the storage volume of food in the storage compartment 11 increases, the light will be blocked or absorbed by the food, so the light intensity detected by the first side photosensitive unit 83 and the second side photosensitive unit 85 will follow. Decrease, and reflect on the top side illuminance value. Therefore, according to the top side illuminance value measured in step S1, the amount of food stored in the refrigerator 100 can be roughly determined. However, when the light source (the top-side light-emitting diodes 811) is fixed in position, placing the same food in different positions in the storage compartment 11 will cause the illumination state in the storage compartment 11 to be different. Differences affect the judgment results. Therefore, it is better to detect the storage capacity through different light sources to improve the accuracy of the detection results.

In step S2, the control unit 4 causes the first side light-emitting diode 821 of the first side light-emitting unit 82 to emit light. During the light-emitting period of the first side light-emitting diode 821, only the first side light-emitting diode 821 emits light. The side photosensitive unit 83 detects the light intensity (that is, the second side photosensitive unit 85 is turned off or the detection result is not included in the calculation), and the control unit 4 stores a corresponding first side illuminance value. Since the light-emitting diode is a light-emitting element with higher light intensity in the optical axis direction (the direction toward the second side for the first side light-emitting diode 821), the first side light-emitting unit 82 In the state of being on the same side as the first side photosensitive unit 83, the optical axis of the first side light emitting diode 821 is not aligned with the first side photosensitive unit 83, so the first side photosensitive unit Most of the light received by 83 is reflected light. Similar to step S1, the first side illuminance value is roughly inversely proportional to the storage capacity, that is, the lower the first side illuminance value, the higher the food storage capacity. Since the relative positions of the light source (the first side light emitting diode 821) and the light sensor (the first side photosensitive unit 83) in the storage chamber 11 in this step are different from the configuration of step S1, The first side illuminance value measured in step S2 can compensate possible errors in the detection procedure of step S1 to a certain extent.

After step S2 is completed, step S3 is executed. The control unit 4 causes the second side light emitting diode 841 of the second side light emitting unit 84 to emit light, and the second side light emitting diode 841 of the second side light emitting unit 85 emits light. The side light sensor 851 detects the light intensity during the period when the second side light emitting unit 84 emits light, and the control unit 4 stores a corresponding second side illuminance value. Similar to step S2, since the second side light-emitting unit 84 and the second side light-sensing unit 85 are located on the same side (the second side), the second side light sensor 851 receives more light. It is reflected light, and the storage capacity of the refrigerator can be judged according to the received light intensity. In addition, due to the installation position of the light source (the second side light-emitting diode 841) used in this step S3 and the light source of step S1 (the top side light-emitting diode 811), the light source of step S2 (the first side light-emitting diode) The side light-emitting diodes 821) are all different, and the three are located in different positions in the storage chamber 11, so the detection errors that may exist in the foregoing steps can be further compensated. For example, when the food is placed closer to the top side light-emitting diode 811 or the first side light-emitting diode 821, a greater shading effect will be caused in steps S1 and S2, so that the first side light The light intensity received by the sensor 831 and/or the second side light sensor 851 is lower than that of the same food. Placed away from the top side light-emitting diode 811 or the first side light-emitting diode 821 Therefore, the food storage capacity is overestimated in steps S1 and S2. However, in this step S3, the cooperation of the second side light emitting diode 841 and the second side light sensor 851 can effectively solve the above-mentioned problem and estimate the storage capacity more accurately.

Furthermore, in this embodiment, the top-side light-emitting diodes 811, the first side-side light-emitting diodes 821, and the second side-side light-emitting diodes 841 are arranged in the upper half of the storage compartment 11. , And located on the storage room scaffolds 31 and the door back scaffolds 32. On the other hand, the first side light sensor 831 and the second side light sensor 851 are arranged in the lower half of the storage room 11, and are located on the storage room shelves 31 and the door backs. Under the scaffold 32. In terms of the light travel route, most of the light received by the first side light sensor 831 and the second side light sensor 851 are from the top side light-emitting diodes 811 and the first side light sensor. After the side light emitting diode 821 and the second side light emitting diode 841 are emitted, they penetrate downwardly through the storage room shelf 31 and the door back shelf 32 area. In this way, compared to the embodiment in which the first side light sensor 831 and the second side light sensor 851 are changed to be disposed in the upper half of the storage compartment 11, or the top side light-emitting two The pole body 811, the first side light-emitting diode 821, and the second side light-emitting diode 841 are changed to an embodiment in which they are arranged in the lower half of the storage compartment 11. In this embodiment, the light source and the light sensor The devices are respectively arranged in the upper half and the lower half of the storage room 11, which can be more accurate according to the influence of the food placed on the storage room shelf 31 and the door back shelf 32 on the light intensity. Determine the current reserves.

In addition, although this embodiment uses the sequential execution of steps S1~S3 as an example to illustrate the execution sequence of the three, steps S1~S3 are in principle independent detection procedures, so in fact, any Steps S1 to S3 are executed sequentially, and are not limited to the foregoing disclosure. In addition, according to actual needs, the steps S2 and S3 can also be executed one by one, and it is not limited to execute all three.

After completing the aforementioned steps S1 to S3, then step S4 can be executed. The control unit 4 causes one of the first side light-emitting unit 82 and the second side light-emitting unit 84 to emit light, and the first side light-emitting unit 84 One of the light-sensing unit 83 and the second side light-sensing unit 85 located on the opposite side of the light-emitting period detects the light intensity during the light-emitting period, and the control unit 4 stores a corresponding door back compensation illuminance value. For example, in step S4, the first side light-emitting diode 821 of the first side light-emitting unit 82 can emit light, and the light-emitting period is sensed by the second side light of the second side light-emitting unit 85. The detector 851 detects the light intensity in the storage room 11 to generate the compensation illuminance value of the door back. Since the first side light emitting diode 821 and the second side light sensor 851 are arranged adjacent to the door back scaffolds 32 of the door body, and they are compared with the door body 2, the The back shelf 32 of the waiting door is arranged diagonally, so compared to the detection method of step S2, a higher proportion of the light received by the second side light sensor 851 is that of the first side light emitting diode. The light that directly penetrates the area of the door-back scaffolds 32 after being emitted by the polar body 821 is different from step S2 in that it receives reflected light and is therefore suitable for detecting the storage capacity of the door-back scaffolds 32 area. In addition to performing step S4 by the cooperation of the first side light emitting diode 821 and the second side light sensor 851, this step S4 may also be performed by the second side light emitting diode 841 and the second side light sensor 851. The side light sensor 831 cooperates with the implementation, or is used in conjunction with the above two detection methods, both of which can achieve the effect of obtaining the compensation illuminance value of the door back.

After completing step S4, in step S5, the control unit 4 will set a change threshold according to the door back compensation illuminance value. The change threshold can be selected through preset judgment conditions. For example, when the control unit 4 judges that the storage capacity of the door back scaffolds 32 is less than a certain degree according to the door back compensation illuminance value, the change threshold is set to 6% , And when the storage capacity is large, the change threshold is set to 3%. This setting method is derived from the detection process of step S4, and the detection results of the door back scaffolds 32 areas are further compensated for steps S1~S3 The detection result.

In steps S6 and S7, the control unit 4 determines the amount of change in at least one of the top side illuminance value, the first side illuminance value, and the second side illuminance value compared to the previous detection value Whether the change amount is greater than the change threshold value, and the operation mode of the refrigeration unit 5 is set according to the judgment result. For example, in step S6, the control unit 4 will be based on the top side illuminance value, the first side illuminance value, the second side illuminance value, etc. individually and the previous detection value (that is, the user opened and closed the previous time). The value detected after the door 2 and stored in the control unit 4) is compared to obtain the amount of change between the current detection result and the previous detection result. The amount of change is, for example, calculated as a percentage corresponding to the change threshold. In addition, it can also be calculated by means of difference. Assuming that the change threshold value in step S5 is 6%, it means that the storage capacity in the refrigerator 100 is low. At this time, the refrigeration unit 5 is set to operate in an energy-saving mode. If the top side illuminance value is calculated in step S6 , The variation of the first side illuminance value and the second side illuminance value is less than 6%, which means that the user did not put in or take out too much food before and after the doors 2 were opened and closed. , Resulting in little change in the storage capacity of the refrigerator 100, so the refrigeration unit 5 can continue to be maintained in an energy-saving state; if the change in any of the three is greater than 6% and is a positive value, it represents the increase in the storage capacity of the refrigerator 100 When reaching a certain level, the control unit 4 will cause the refrigeration unit 5 to operate at a higher power to maintain the low temperature environment in the storage room 11. Accordingly, the control and switching of the operation mode can be realized based on the calculation of the change amount. Of course, according to actual needs, the calculation of the amount of change can also be implemented in different ways, as long as it can be obtained on the basis of the top side illuminance value, the first side illuminance value, and the second side illuminance value. Have a certain degree of reliability.

Based on the above description, the present invention, through the arrangement of the storage quantity detection system 8, cooperates with the multiple execution steps of the storage quantity detection method, reduces the detection result error caused by factors such as the food placement position, and can effectively improve the accuracy of the detection result. Therefore, the refrigerator 100 can execute an appropriate operation mode according to the judgment result of the storage capacity to realize the effect of effective use of energy, so it can indeed achieve the purpose of the invention.

100: refrigerator 1: cabinet 11: Storage room 2: door body 3: Scaffolding structure 31: Storage room scaffolding 32: door back scaffolding 4: control unit 5: Refrigeration unit 6: Door body sensing unit 7: Lighting unit 8: Storage volume detection system 81: Top side light-emitting unit 811: Top side light-emitting diode 82: The first side light-emitting unit 821: first side light emitting diode 83: The first side photosensitive unit 831: The first side light sensor 84: second side light-emitting unit 841: second side light emitting diode 85: second side photosensitive unit 851: second side light sensor S1~S7: Process steps

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a schematic diagram illustrating an embodiment of the refrigerator of the present invention; Figure 2 is a system block diagram of this embodiment; and Fig. 3 is a flowchart illustrating an embodiment of the refrigerator storage capacity detection method of the present invention.

S1~S7: Process steps

Claims (9)

A method for detecting the storage capacity of a refrigerator is executed by a refrigerator. The refrigerator includes a cabinet, a door, a control unit, and a storage capacity detection system. The cabinet defines a storage room, and the storage capacity detection system is arranged in the storage room. And is adjacent to the door, and includes a top side light emitting unit arranged on the top side of the storage room, a first side light emitting unit arranged on a first side of the storage room, and a first side light emitting unit arranged on the first side A first side light-sensing unit laterally and longitudinally spaced apart from the first side light-emitting unit, a second side light-emitting unit disposed on a second side of the storage room, and a second side light-emitting unit disposed on the second side and The second side light-sensing unit longitudinally spaced apart from the second side light-emitting unit, the storage amount detection method includes the following steps: (A) The control unit makes the top side light-emitting unit emit light, and at least one of the first side light-emitting unit and the second side light-emitting unit detects the light intensity during the light-emitting period of the top side light-emitting unit, and the The control unit stores a corresponding top side illuminance value; (B) The control unit makes the first side light-emitting unit emit light, the first side light-sensing unit detects the light intensity during the period when the first side light-emitting unit emits light, and the control unit stores a corresponding first Side illuminance value; (C) The control unit makes one of the first side light-emitting unit and the second side light-emitting unit emit light, and the light-emitting side of the first side light-emitting unit and the second side light-emitting unit is located on the opposite side One detects the light intensity during the light-emitting period, and the control unit stores a corresponding door back compensation illuminance value; (D) The control unit sets a change threshold according to the compensation illuminance value of the door back; and (E) The control unit determines whether the change is greater than the change threshold according to the change of at least one of the top side illuminance value and the first side illuminance value compared to the previous detection value. The method for detecting storage capacity of a refrigerator according to claim 1, wherein the first side and the second side are located on opposite sides; before step (B) or step (C), the method further includes: step (F): The control unit makes the second side light-emitting unit emit light, the second side light-sensing unit detects the light intensity during the period when the second side light-emitting unit emits light, and the control unit stores a corresponding second side illuminance value ; In step (E), the control unit determines the amount of change in at least one of the top side illuminance value, the first side illuminance value, and the second side illuminance value compared to the previous detection value Whether the amount of change is greater than the change threshold. The refrigerator storage capacity detection method according to claim 1, wherein the refrigerator further includes a refrigeration unit for adjusting the temperature of the storage room; after step (E), it further includes: step (G) the control unit is based on The judgment result of this step (E) sets the operation mode of the refrigeration unit. The refrigerator storage capacity detection method according to any one of claims 1 to 3, wherein the first side light-emitting unit and the second side-detecting photosensitive unit are located at different longitudinal heights relative to the door body, and the first The two side light-emitting units and the first side light-sensing unit are located at different longitudinal heights relative to the door. A refrigerator containing: A box, defining a storage room; A door, which can be opened and closed on the box; A control unit arranged in the box; The uniform cooling unit is arranged in the box and controlled by the control unit to adjust the temperature of the storage room; and A storage quantity detection system includes a top side light emitting unit arranged on the top side of the storage room, a first side light emitting unit arranged on a first side of the storage room, and a first side light emitting unit arranged on the first side And longitudinally spaced apart from the first side light-emitting unit of the first side light-emitting unit, a second side light-emitting unit arranged on a second side of the storage room, and a longitudinally arranged on the second side A second side light-sensing unit spaced apart from the second side light-emitting unit, Wherein, the control unit can make the top side light-emitting unit emit light, and at least one of the first side light-emitting unit and the second side light-emitting unit detects the light intensity during the light-emitting period of the top side light-emitting unit, and the light intensity is detected by the top side light-emitting unit. The control unit stores a corresponding top-side illuminance value; the control unit can make the first side light-emitting unit emit light, and the first side light-sensing unit detects the light intensity during the light-emitting period of the first side light-emitting unit, and The control unit stores a corresponding first side illuminance value; the control unit can cause one of the first side light-emitting unit and the second side light-emitting unit to emit light, and the first side light-sensing unit and the The one on the opposite side of the second side photosensitive unit detects the light intensity during the light-emitting period, and the control unit stores a corresponding door back compensation illuminance value; the control unit can set according to the door back compensation illuminance value A change threshold; the control unit can determine whether the change is greater than the change threshold according to the change of at least one of the top side illuminance value and the first side illuminance value compared to the previous detection value. The refrigerator according to claim 5, wherein the control unit can further cause the second side light-emitting unit to emit light, and the second side light-sensing unit detects the light intensity during the period when the second side light-emitting unit emits light, and The control unit stores a corresponding second side illuminance value; the control unit also determines whether the change amount is greater than the change threshold value according to the second side illuminance value. The refrigerator according to claim 5, wherein the first side light-emitting unit and the second side light-emitting unit are located in the upper half of the storage compartment, and the first side light-sensing unit and the two side light-sensing units are located The bottom half of the storage room. The refrigerator according to claim 6, wherein the first side light-emitting unit and the second side light-sensing unit are located at different longitudinal heights relative to the door, and the second side light-emitting unit and the first side light-emitting unit The side photosensitive unit is located at a different longitudinal height relative to the door. The refrigerator according to claim 5, further comprising a shelf structure including at least one storage room shelf arranged in the storage room and at least one door back shelf arranged in the door; the top side The light-emitting unit has at least one top-side light-emitting diode located on the storage room shelf and the door-back shelf, and the first side light-emitting unit has a top-side light-emitting diode located on the storage room shelf and the door-back shelf The first side light-emitting diode, the second side light-emitting unit has a second side light-emitting diode on the storage room shelf and the door back shelf; the first side light-sensing unit And the second side photosensitive unit is located under the storage room shelf and the door back shelf.

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