Refrigerator

Abstract

The utility model relates to the technical field of refrigeration equipment, and discloses a refrigerator which comprises a refrigerator body, a fan, a light curtain sensor and a main control board. A chamber and an air duct communicated with the chamber are arranged in the cabinet body; the fan is arranged in the air duct; the light curtain sensor is arranged in the chamber and used for measuring the use capacity of the chamber; the main control board is arranged on the cabinet body, electrically connected with the draught fan and the light curtain sensor and used for controlling the rotating speed of the draught fan according to the use capacity, measured by the light curtain sensor, of the chamber. According to the method and the device, the use capacity of articles in the chamber is measured, and the adjusting precision of the refrigerating capacity and the rotating speed of the fan is improved.

Description

Technical Field

[0001] This application relates to the technical field of refrigeration equipment, for example, to a freezer cabinet. Background Art

[0002] Currently, a freezer cabinet, also known as a freezing cabinet, is a refrigeration device specifically used for freezing food. Compared with a refrigerator, the freezer cabinet has a relatively single function and is mainly used for freezing and storing a large amount of food. After the compressor refrigerates, the air flow is accelerated by a fan to improve the heat exchange efficiency of the air inside the freezer cabinet compartment. The refrigerating capacity of the freezer cabinet and the rotational speed of the fan are mainly adjusted according to the temperature inside the freezer cabinet, so that the adjustment of the refrigerating capacity and the rotational speed of the fan is relatively rough and the energy consumption is high.

[0003] In the related art, there is a freezer cabinet with a weight sensor provided at the bottom of the refrigerating compartment. When an item is placed in the freezer cabinet, the weight of the item is obtained through the weight sensor, and then the quantity of the item is judged. The refrigerating capacity of the freezer cabinet and the rotational speed of the fan are adjusted according to the quantity of the item, improving the accuracy of the adjustment of the refrigerating capacity and the rotational speed of the fan and reducing the energy consumption of the freezer cabinet operation.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] The weight of the item cannot accurately reflect the actual usage capacity inside the freezer cabinet, and the accuracy of the adjustment of the refrigerating capacity and the rotational speed of the fan is still low.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide a freezer cabinet to measure the usage capacity of items in the compartment and improve the accuracy of the adjustment of the refrigerating capacity and the rotational speed of the fan.

[0009] In some embodiments, the freezer cabinet includes: a cabinet body, a fan, a light curtain sensor, and a main control board. A compartment and an air duct communicating with the compartment are provided inside the cabinet body; the fan is arranged in the air duct; the light curtain sensor is arranged in the compartment and is used to measure the usage capacity of the compartment; the main control board is arranged on the cabinet body and is electrically connected to the fan and the light curtain sensor, and is used to control the rotational speed of the fan according to the usage capacity of the compartment measured by the light curtain sensor.

[0010] Optionally, the light curtain sensor has a strip structure and is disposed on the side wall of the compartment, with both ends extending to opposite sides of the side wall of the compartment respectively.

[0011] Optionally, the light curtain sensor includes a transmitting end and a receiving end, and the two are oppositely disposed on two opposite side walls of the inner wall of the compartment.

[0012] Optionally, a plurality of light curtain sensors are provided and are evenly disposed on the side wall of the compartment.

[0013] Optionally, some of the plurality of light curtain sensors are vertically disposed on the side wall of the compartment, and the rest are horizontally disposed inside the side wall of the compartment, or all of the plurality of light curtain sensors are vertically disposed on the side wall of the compartment.

[0014] Optionally, a plurality of light curtain sensors are provided, and one or more of them are disposed at the mouth edge of the compartment for obtaining whether a user stores or retrieves items into or from the compartment.

[0015] Optionally, the side wall of the compartment is provided with air outlets communicating with the air duct, and a plurality of air outlets are provided. The plurality of air outlets are evenly disposed on one side wall of the compartment.

[0016] Optionally, a press machine compartment avoidance protrusion is provided near the first side wall inside the compartment. When the light curtain sensor is disposed on the first side wall, the light curtain sensor is segmented, with part disposed on the first side wall and the rest disposed on the side wall of the press machine compartment avoidance protrusion, and the projections of the two segments of the light curtain sensor on the first side wall are connected end to end.

[0017] Optionally, the light curtain sensor is embedded in the inner side wall of the compartment.

[0018] Optionally, the refrigerator further includes: a cabinet door and a unilateral light curtain sensor. The cabinet door is slidably connected to the cabinet body; the unilateral light curtain sensor is disposed on a side wall of the cabinet door facing the compartment and is electrically connected to the main control board.

[0019] The refrigerator provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] When storing items inside the compartment, the light curtain sensor emits an infrared beam and receives the infrared beam, and the stored items will block the infrared beam. The used capacity of the compartment measured by the light curtain sensor can more accurately reflect the actual used capacity inside the compartment. Then, the main control board controls the rotation speed of the blower according to the amount of the used capacity, improves the adjustment accuracy of the refrigerating capacity and the rotation speed of the blower, and reduces the energy consumption of the refrigerator during operation. For example, when the used capacity is relatively large, the refrigerator is adjusted to a working condition with a relatively large refrigerating capacity, and the blower is controlled to operate at a relatively high rotation speed. When the used capacity is relatively small, the refrigerator is adjusted to a working condition with a relatively small refrigerating capacity, and the blower is controlled to operate at a relatively low rotation speed.

[0021] The above general description and the following description are only exemplary and explanatory, and are not used to limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and among them:

[0023] Figure 1 is a schematic structural diagram of a freezer provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic internal structure diagram of a freezer provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic structural diagram of another freezer provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic structural diagram of another freezer provided by an embodiment of the present disclosure;

[0027] Figure 5 is a schematic structural diagram of another freezer provided by an embodiment of the present disclosure;

[0028] Figure 6 is a schematic structural diagram of another freezer provided by an embodiment of the present disclosure;

[0029] Figure 7 is an exploded schematic diagram of a schematic structural diagram of a freezer provided by an embodiment of the present disclosure;

[0030] Figure 8 is a schematic structural diagram of a cabinet door provided by an embodiment of the present disclosure.

[0031] REFERENCE SIGNS:

[0032] 100, cabinet body; 101, compartment; 102, air duct; 103, air outlet; 104, press compartment avoidance protrusion; 110, first side wall; 200, fan; 300, light curtain sensor; 310, transmitting end; 320, receiving end; 400, main control board; 510, cabinet door; 520, single-sided light curtain sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to more comprehensively understand the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and illustration only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0034] In the embodiments of the present disclosure, the terms "first", "second", etc. in the specification, claims and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data may be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0035] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their implementations, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation. Moreover, in addition to being able to represent an orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0036] In addition, the terms "arranged", "connected" and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0037] Unless otherwise specified, the term "plurality" means two or more.

[0038] It should be noted that, without conflict, the embodiments and the features in the embodiments of the present disclosure may be combined with each other.

[0039] Combined with Figure 1-2As shown in the figure, an embodiment of the present disclosure provides a freezer, including: a cabinet body 100, a fan 200, a light curtain sensor 300, and a main control board 400. Inside the cabinet body 100, there is a compartment 101 and an air duct 102 communicating with the compartment 101; the fan 200 is arranged in the air duct 102; the light curtain sensor 300 is arranged in the compartment 101 for measuring the usable capacity of the compartment 101; the main control board 400 is arranged on the cabinet body 100 and is electrically connected to the fan 200 and the light curtain sensor 300, and is used for controlling the rotation speed of the fan 200 according to the usable capacity of the compartment 101 measured by the light curtain sensor 300.

[0040] When using the freezer provided by the embodiment of the present disclosure, when there are items stored inside the compartment 101, the light curtain sensor 300 emits an infrared beam and receives the infrared beam, and the stored items will block the infrared beam. The usable capacity of the compartment 101 measured by the light curtain sensor 300 can more accurately reflect the actual usable capacity inside the compartment 101. Then, the main control board 400 controls the rotation speed of the fan 200 according to the amount of the usable capacity, improves the adjustment accuracy of the refrigerating capacity and the rotation speed of the fan 200, and reduces the energy consumption of the freezer operation. For example, when the usable capacity is relatively large, the freezer is adjusted to a working condition with a relatively large refrigerating capacity, and the fan 200 is controlled to operate at a relatively high rotation speed. When the usable capacity is relatively small, the freezer is adjusted to a working condition with a relatively small refrigerating capacity, and the fan 200 is controlled to operate at a relatively low rotation speed.

[0041] Optionally, the light curtain sensor 300 is in a strip structure and is arranged on the side wall of the compartment 101, and both ends extend to the opposite sides of the side wall of the compartment 101 respectively. In this way, the light curtain sensor 300 is arranged relatively long, increasing the measurable range of the light curtain sensor 300 and improving the measurement accuracy.

[0042] Optionally, the light curtain sensor 300 is arranged vertically. In this way, since the items stored in the compartment 101 are stacked gradually upward from the bottom of the compartment 101, when the number of stored items increases, the stacking height of the items also increases. And the vertically arranged light curtain sensor 300 can better detect the height of the placed items to judge the usable capacity of the compartment 101.

[0043] Combined with Figure 3 and Figure 4As shown, optionally, the light curtain sensor 300 includes a transmitting end 310 and a receiving end 320, and the two are oppositely arranged on two opposite side walls of the inner wall of the compartment 101. In this way, the transmitting end 310 emits an infrared light beam towards the receiving end 320. When there is no item stored inside the compartment 101, the receiving end 320 can receive all the infrared light beams. When there is an item stored inside the compartment 101, the usable capacity inside the compartment 101 is determined according to the number of infrared light beams received by the receiving end 320. The transmitting end 310 and the receiving end 320 are oppositely arranged on two opposite side walls of the inner wall of the compartment 101, and the measurement range covers between the two side walls of the compartment 101, with a larger measurement range.

[0044] Optionally, a plurality of light curtain sensors 300 are provided and evenly arranged on the side wall of the compartment 101. In this way, by providing a plurality of light curtain sensors 300, the usable capacity of more areas inside the compartment 101 can be measured, with higher measurement accuracy, thereby improving the adjustment accuracy of the cooling capacity and the rotational speed of the fan 200.

[0045] Optionally, when a plurality of light curtain sensors 300 are provided, a light curtain sensor 300 is provided on each vertical side wall of the compartment 101. In this way, a light curtain sensor 300 is provided on each vertical side wall of the compartment 101, enabling the light curtain sensor 300 to measure the usable capacity inside the compartment 101 from more directions, with higher measurement accuracy, thereby improving the adjustment accuracy of the cooling capacity and the rotational speed of the fan 200.

[0046] Optionally, two light curtain sensors 300 are provided. The transmitting end 310 and the receiving end 320 of one light curtain sensor 300 are arranged on two opposite side walls of the inner wall of the compartment 101, and the transmitting end 310 and the receiving end 320 of the other light curtain sensor 300 are arranged on two other opposite side walls of the inner wall of the compartment 101. In this way, the usable capacity inside the compartment 101 is measured from two different directions by the two light curtain sensors 300, with relatively high measurement accuracy, thereby improving the adjustment accuracy of the cooling capacity and the rotational speed of the fan 200.

[0047] Combined with Figure 5As shown, optionally, some of the multiple light curtain sensors 300 are vertically arranged on the side wall of the compartment 101, and the rest are horizontally arranged inside the side wall of the compartment 101, or all of the multiple light curtain sensors 300 are vertically arranged on the side wall of the compartment 101. In this way, when some of the multiple light curtain sensors 300 are vertically arranged on the side wall of the compartment 101 and the rest are horizontally arranged inside the side wall of the compartment 101, the vertically arranged light curtain sensors 300 can better detect the height at which the items are placed, while the horizontally arranged light curtain sensors 300 have a larger detection range in the horizontal direction, reducing the detection dead angle and improving the detection accuracy. When all of the multiple light curtain sensors 300 are vertically arranged on the side wall of the compartment 101, the usable capacity of more areas inside the compartment 101 can be measured, and the measurement accuracy is higher, thereby improving the adjustment accuracy of the cooling capacity and the rotation speed of the blower 200.

[0048] Optionally, there are multiple light curtain sensors 300, and one or more of them are arranged at the rim of the compartment 101 for obtaining whether the user stores or retrieves items from the compartment 101. In this way, when the user stores or retrieves items in the compartment 101, the light beam of the light curtain sensor 300 at the rim of the compartment 101 will be blocked, thereby sensing the user's putting and taking actions. Through sensing, the putting and taking times can be obtained and counted, and the passenger flow can be monitored. After sensing the putting and taking actions, the data can also be sent to the main control board 400, and the main control board 400 controls the light curtain sensors 300 inside the compartment 101 to re-detect the usable capacity inside the compartment 101, timely adjusting the cooling capacity and the rotation speed of the blower 200, ensuring the storage effect of the refrigerator while reducing the operating energy consumption of the refrigerator.

[0049] Optionally, there are air outlets 103 communicated with the air duct 102 on the side wall of the compartment 101, and there are multiple air outlets 103 which are evenly arranged on one side wall of the compartment 101. In this way, by arranging multiple air outlets 103, the cooled air after heat exchange is blown to different areas in the refrigerator, reducing the temperature difference between different areas inside the compartment 101 and making the temperature more uniform. When there are fewer items stored, there are items in some areas inside the compartment 101 and no items in some other areas. The air outlets 103 corresponding to the areas with items send air into the compartment 101, ensuring the storage effect of the refrigerator while reducing the operating energy consumption of the refrigerator.

[0050] Optionally, when two light curtain sensors 300 are provided, two air outlets 103 are provided, and the two air outlets 103 are respectively arranged on both sides of one of the transmitting ends 310 or the receiving ends 320. In this way, the two air outlets 103 are arranged on both sides of one of the transmitting ends 310 or the receiving ends 320. When the items in the compartment 101 are concentrated on one side of one of the air outlets 103, only the corresponding one air outlet 103 needs to supply air into the compartment 101, ensuring the storage effect of the freezer while reducing the operating energy consumption of the freezer.

[0051] Optionally, when the compartment 101 is a cuboid cavity structure and two light curtain sensors 300 are provided, two air outlets 103 are provided and arranged on the inner side walls of the long sides of the compartment 101, and the two air outlets 103 are arranged on both sides of the transmitting end 310 or the receiving end 320. In this way, the length of the air outlets 103 can be set relatively long, and the air supply area is relatively large, reducing the temperature difference in different areas inside the compartment 101 and making the temperature more uniform.

[0052] Optionally, a press compartment avoidance protrusion 104 is provided near the first side wall 110 inside the compartment 101. When the light curtain sensor 300 is arranged on the first side wall 110, the light curtain sensor 300 is arranged in sections, part of it is arranged on the first side wall 110, and the rest is arranged on the side wall of the press compartment avoidance protrusion 104, and the projections of the two sections of the light curtain sensor 300 on the first side wall 110 are connected end to end. In this way, since the press compartment avoidance protrusion 104 protrudes from the first side wall 110 of the compartment 101, the light curtain sensor 300 is arranged in sections, which can be adapted to the press compartment avoidance protrusion 104. One section of the light curtain sensor 300 is arranged on the first side wall 110, and the other section of the light curtain sensor 300 is arranged on the side wall of the press compartment avoidance protrusion 104, ensuring the measurement effect of the light curtain sensor 300.

[0053] Specifically, the light curtain sensor 300 being arranged in sections means that its transmitting end 310 or receiving end 320 is arranged in sections, part of it is arranged on the first side wall 110, and the rest is arranged on the side wall of the press compartment avoidance protrusion 104.

[0054] Optionally, the light curtain sensor 300 is embedded in the inner side wall of the compartment 101. In this way, the risk of the light curtain sensor 300 protruding from the inner side wall of the compartment 101 is reduced, the risk of the light curtain sensor 300 rubbing against the items stored in the compartment 101 is reduced, and the risk of the light curtain sensor 300 shifting is reduced. It also reduces the occupation of the space inside the compartment 101 by the light curtain sensor 300.

[0055] Optionally, both the transmitting end 310 and the receiving end 320 are embedded in the inner side wall of the compartment 101. In this way, the risk of the transmitting end 310 and the receiving end 320 protruding from the inner side wall of the compartment 101 is reduced, the risk of scratching the items stored in the compartment 101 by the transmitting end 310 and the receiving end 320 is reduced, and the risk of deviation of the transmitting end 310 and the receiving end 320 is reduced. It also reduces the occupation of the space in the compartment 101 by the transmitting end 310 and the receiving end 320.

[0056] Combined Figure 6 、 Figure 7 and Figure 8 As shown, optionally, the refrigerator further includes: a cabinet door 510 and a unilateral light curtain sensor 520. The cabinet door 510 is slidably connected to the cabinet body 100; the unilateral light curtain sensor 520 is disposed on a side wall of the cabinet door 510 facing the compartment 101 and is electrically connected to the main control board 400. In this way, since the cabinet door 510 slides relative to the cabinet body 100 during the opening process, the unilateral light curtain sensor 520 follows the movement of the cabinet door 510, performs a moving measurement on the items in the compartment 101, has a larger measurement range, and a better measurement effect.

[0057] It can be understood that the unilateral light curtain sensor 520 is different from the traditional opposed light curtain sensor 300 and does not require independent transmitting and receiving ends. The light emitting unit and the receiving unit of the unilateral light curtain sensor 520 are integrated on the same side and emit light through the light emitting unit. When the light irradiates the detected object, the object diffusely reflects the light to the receiving unit.

[0058] Optionally, there are multiple cabinet doors 510, each cabinet door 510 is slidably connected to the cabinet body 100, and part or all of the multiple cabinet doors 510 are provided with unilateral light curtain sensors 520. In this way, when each cabinet door 510 slides relative to the cabinet body 100, it drives the corresponding unilateral light curtain sensor 520 to move accordingly, performs a moving measurement on the items in the compartment 101, has a larger measurement range, and a better measurement effect.

[0059] Optionally, when there are two cabinet doors 510, the two cabinet doors 510 are arranged vertically; the lower cabinet door 510 is provided with a unilateral light curtain sensor 520. In this way, when the upper cabinet door 510 slides relative to the cabinet body 100 and opens, the lower cabinet door 510 will block the upper cabinet door 510. Therefore, the lower cabinet door 510 is provided with a unilateral light curtain sensor 520 to avoid the situation where the unilateral light curtain sensor 520 is blocked.

[0060] Optionally, when there are two cabinet doors 510, a single-sided light curtain sensor 520 is provided at one end of the lower cabinet door 510 facing away from the cabinet body 100. In this way, when the lower cabinet door 510 closes the cabinet body 100, the single-sided light curtain sensor 520 is located at the middle position of the compartment 101. The lower cabinet door 510 slides open on the cabinet body 100, and the single-sided light curtain sensor 520 can slide with the cabinet door 510 to the edge position of the compartment 101, with a larger measurement range.

[0061] Optionally, when there are two cabinet doors 510, single-sided light curtain sensors 520 are provided at both ends of the lower cabinet door 510. In this way, when the lower cabinet door 510 closes the cabinet body 100, one of the single-sided light curtain sensors 520 is located at the middle position of the compartment 101, and the other single-sided light curtain sensor 520 is located at the edge position of the compartment 101. The lower cabinet door 510 slides open on the cabinet body 100. The middle single-sided light curtain sensor 520 can slide with the cabinet door 510 to the edge position of the compartment 101, and the edge single-sided light curtain sensor 520 can slide with the cabinet door 510 to the middle position of the compartment 101, realizing a large-range measurement inside the compartment 101 with higher measurement accuracy.

[0062] Optionally, the main control board 400 is used to control the rotation speed of the blower 200 according to the usage capacity of the compartment 101 measured by the light curtain sensor 300, including: the main control board 400 obtains the number of induction light beams received by the light curtain sensor 300, and controls the rotation speed of the blower 200 according to the magnitude relationship between the number of induction light beams and the number of no-load light beams. In this way, the number of induction light beams can reflect the usage capacity of the items inside the compartment 101, and then adjust the cooling capacity of the refrigerator according to the usage capacity of the items, improving the adjustment accuracy of the cooling capacity and the rotation speed of the blower 200.

[0063] It can be understood that the no-load light beam refers to the number of induction light beams when there are no items stored inside the compartment 101.

[0064] Optionally, the main control board 400 obtains the number of sensing light beams received by the light curtain sensor 300, and controls the rotation speed of the blower 200 according to the magnitude relationship between the number of sensing light beams and the number of no-load light beams, including: when the number of sensing light beams is equal to the number of no-load light beams, controlling the blower 200 to operate at the minimum rotation speed; when the number of sensing light beams is equal to 0, controlling the blower 200 to operate at the maximum rotation speed; when the number of sensing light beams is greater than 0 and less than or equal to the number of no-load light beams, controlling the rotation speed of the blower 200 according to the magnitude relationship between the number of sensing light beams and the number of half-load light beams. In this way, when the number of sensing light beams is equal to the number of no-load light beams, it indicates that there are no items stored in the compartment 101, and the blower 200 operates at the minimum rotation speed to reduce the operating energy consumption. When the number of sensing light beams is equal to 0, it indicates that the compartment 101 is full of items and the freezer is in the full-load state, and the blower 200 is controlled to operate at the maximum rotation speed to ensure the storage effect of the items. When the number of sensing light beams is greater than 0 and less than or equal to the number of no-load light beams, it indicates that there are items stored in the compartment 101 and it is not full. At this time, judge the magnitude relationship between the number of sensing light beams and the number of half-load light beams. If the number of sensing light beams is larger or equal to the number of half-load light beams, the stored items are less than or equal to half of the volume of the compartment 101, and the blower 200 is controlled to operate at a lower rotation speed to ensure the storage effect of the freezer and reduce the operating energy consumption. If the number of sensing light beams is smaller, the stored items are greater than half of the volume of the compartment 101, and the blower 200 is controlled to operate at a higher rotation speed to ensure the storage effect of the freezer.

[0065] It can be understood that the number of half-load light beams refers to the number of sensing light beams when half of the internal volume of the compartment 101 is used.

[0066] Optionally, the main control board 400 controls the rotation speed of the blower 200 according to the magnitude relationship between the number of sensing light beams and the number of half-load light beams, including: when the number of sensing light beams is greater than or equal to the number of half-load light beams and greater than the number of no-load light beams, controlling the blower 200 to operate at the first rotation speed; when the number of sensing light beams is greater than 0 and less than the number of half-load light beams, controlling the rotation speed of the blower 200 to operate at the second rotation speed; where the second rotation speed is greater than the first rotation speed. In this way, when the number of sensing light beams is larger or equal to the number of half-load light beams, the stored items are less than or equal to half of the volume of the compartment 101, and the blower 200 is controlled to operate at the lower first rotation speed to ensure the storage effect of the freezer and reduce the operating energy consumption. If the number of sensing light beams is smaller, the stored items are greater than half of the volume of the compartment 101, and the blower 200 is controlled to operate at the higher second rotation speed to ensure the storage effect of the freezer.

[0067] Optionally, the first rotation speed = N max / N×V min ; where N max is the number of no-load light beams, N is the number of sensing light beams, V minis the minimum speed of the blower 200, and the minimum speed of the blower 200 is greater than 0. In this way, according to the ratio of the number of no-load light beams to the number of induction light beams, when there are more items, the value of the number of induction light beams is smaller, and the speed of the blower 200 is higher, ensuring the storage effect of the freezer. When there are fewer items, the value of the number of induction light beams is larger, and the speed of the blower 200 is lower, ensuring the storage effect and reducing the operating power consumption.

[0068] Optionally, the second speed = V max -(N / N max ×V max )); where N max is the number of no-load light beams, N is the number of induction light beams, and V max is the maximum speed of the blower 200. In this way, according to the ratio of the number of induction light beams to the number of no-load light beams, when there are more items, the value of the number of induction light beams is smaller, and the speed of the blower 200 is higher, ensuring the storage effect of the freezer. When there are fewer items, the value of the number of induction light beams is larger, and the speed of the blower 200 is lower, ensuring the storage effect and reducing the operating power consumption.

[0069] Optionally, when the freezer includes a cabinet door 510 and a unilateral light curtain sensor 520, after the main control board 400 controls the speed of the blower 200 according to the usage capacity of the compartment 101 measured by the light curtain sensor 300, it further includes: the unilateral light curtain sensor 520 obtains the storage area of the items during the sliding process of the cabinet door 510, and controls the air outlet 103 to blow air according to the storage area of the items. In this way, by measuring and obtaining the storage area of the items through the unilateral light curtain sensor 520, when the items are concentrated on one side of the air outlet 103, the corresponding air outlet 103 on that side is opened to supply air, and the remaining air outlets 103 are closed to reduce the operating power consumption of the freezer.

[0070] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments only represent possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations can vary. Some parts and features of some embodiments can be included in or replaced by those of other embodiments. The embodiments of the present disclosure are not limited to the structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A refrigerator, characterized in that: include: The cabinet (100) is provided with a chamber (101) and an air duct (102) communicating with the chamber (101); A fan (200) is disposed in the air duct (102); A light curtain sensor (300) is disposed in the compartment (101) and is used to measure the usage capacity of the compartment (101); The main control board (400) is arranged on the cabinet (100) and is electrically connected to the fan (200) and the light curtain sensor (300), and is used to control the rotation speed of the fan (200) according to the usage capacity of the compartment (101) measured by the light curtain sensor (300).

2. The refrigerator according to claim 1, characterized in that: The light curtain sensor (300) is a strip-shaped structure, and is disposed on the side wall of the compartment (101), with two ends extending to opposite sides of the side wall of the compartment (101).

3. The refrigerator according to claim 1, characterized in that: The light curtain sensor (300) comprises a transmitting end (310) and a receiving end (320), and the two are arranged oppositely on two opposite side walls of the inner wall of the compartment (101).

4. The refrigerator according to claim 1, characterized in that: A plurality of light curtain sensors (300) are provided and are evenly arranged on the side wall of the chamber (101).

5. The refrigerator according to claim 4, characterized in that: Some of the multiple light curtain sensors (300) are vertically arranged on the side wall of the compartment (101) and the rest are horizontally arranged inside the side wall of the compartment (101), or all of the multiple light curtain sensors (300) are vertically arranged on the side wall of the compartment (101).

6. The refrigerator according to claim 4, characterized in that: A plurality of light curtain sensors (300) are provided, one or more of which are arranged at the edge of the compartment (101) to detect whether a user is taking items into or out of the compartment (101).

7. The refrigerator according to claim 1, characterized in that: An air outlet (103) communicating with the air duct (102) is provided on the side wall of the compartment (101), and a plurality of air outlets (103) are provided, and the plurality of air outlets (103) are evenly arranged on one side wall of the compartment (101).

8. The refrigerator according to any one of claims 1 to 7, characterized in that: A press chamber avoidance protrusion (104) is provided in the chamber (101) near the first side wall (110). When the light curtain sensor (300) is arranged on the first side wall (110), the light curtain sensor (300) is arranged in sections, with a portion arranged on the first side wall (110) and the remaining portion arranged on the side wall of the press chamber avoidance protrusion (104), and the projections of the two sections of the light curtain sensor (300) on the first side wall (110) are connected end to end.

9. The refrigerator according to any one of claims 1 to 7, characterized in that: The light curtain sensor (300) is embedded on the inner wall of the chamber (101).

10. The refrigerator according to any one of claims 1 to 7, characterized in that: Also includes: A cabinet door (510) is slidably connected to the cabinet body (100); The single-side light curtain sensor (520) is arranged on a side wall of the cabinet door (510) facing the compartment (101) and is electrically connected to the main control board (400).

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