LED fresh-keeping special area with heat dissipation function, control method and refrigerator

Abstract

The invention provides an LED fresh-keeping special area with a heat dissipation function, a control method and a refrigerator. The LED fresh-keeping special area comprises a drawer, a sealing cover plate, an LED light source, a vent hole, a fan, a temperature sensor and a controller. The sealing cover plate is arranged at the top of the drawer, and a sealed fresh-keeping space is defined by the sealing cover plate and the drawer; the LED light source is arranged on the side, facing the drawer, of the sealing cover plate. The vent holes are formed in the sealing cover plate and are arranged around the LED light source; the fan is arranged on the side, back to the drawer, of the sealing cover plate, and the air outlet direction of the fan faces the sealing cover plate. The temperature sensor is arranged on the side, facing the drawer, of the sealing cover plate. The controller is in communication connection with the LED light source, the draught fan and the temperature sensor. The controller receives the temperature data detected by the temperature sensor and controls the on-off state of the LED light source and the start and stop of the fan based on the temperature data, so that the problem that the temperature in the LED fresh-keeping special area is unstable is solved.

Description

Technical Field

[0001] This application relates to the field of refrigerator technology, and in particular to an LED preservation zone with heat dissipation function, a control method, and a refrigerator. Background Technology

[0002] In both home and commercial settings, refrigerators are used to store and extend the shelf life of fresh food. Utilizing light technology to promote photosynthesis in fruits and vegetables can effectively slow down their spoilage process and improve the preservation quality and nutritional value of the ingredients. Therefore, providing a dedicated area with light-based preservation technology within the refrigerator can meet the higher demands for fruit and vegetable preservation.

[0003] In related technologies, refrigerators use LED light sources to provide illumination of specific wavelengths to achieve light-based preservation. These light sources are typically placed within the preservation zone, and the heat generated by the LEDs during operation is transferred to the surrounding air through natural heat dissipation. For example, in a sealed drawer structure, the LED light source is in direct contact with the air, and heat is dissipated with the help of heat-conducting elements.

[0004] However, in the aforementioned structure, due to poor air circulation within the preservation zone, the heat generated by the LED light source is difficult to dissipate quickly, leading to localized overheating and significant temperature fluctuations within the zone. This is particularly problematic for leafy vegetables, where temperature fluctuations can cause moisture loss and wilting, affecting preservation effectiveness. Therefore, effectively controlling temperature stability within the preservation zone without compromising the light-based preservation function is a key technical challenge that needs to be addressed. Summary of the Invention

[0005] This application provides an LED preservation zone with heat dissipation function, a control method, and a refrigerator to solve the problem of unstable temperature in the LED preservation zone.

[0006] The first aspect of this application provides an LED food preservation zone with heat dissipation function, including: a drawer, a sealing cover, an LED light source, a vent, a fan, a temperature sensor, and a controller; The sealing cover is located at the top of the drawer and together with the drawer, forms a sealed preservation space. The LED light source is located on the side of the sealing cover facing the drawer; The vent is formed on the sealing cover plate and arranged around the LED light source; The fan is located on the side of the sealing cover facing away from the drawer, and the air outlet direction of the fan is towards the sealing cover. The temperature sensor is located on the side of the sealing cover facing the drawer and is used to detect the temperature of the preservation space; The controller is communicatively connected to the LED light source, the fan, and the temperature sensor, respectively. The controller is configured to receive temperature data detected by the temperature sensor and control the on / off state of the LED light source and the start / stop of the fan based on the temperature data.

[0007] By installing LED light sources and fans in the preservation space and linking them with temperature sensors and controllers, the system can adjust the on / off state of the light sources and the start / stop of the fans based on real-time temperature data. This helps improve the heat dissipation effect in the preservation space, alleviate the problem of excessively high local temperatures, reduce temperature fluctuations, and improve the uniformity and stability of the internal temperature, thereby optimizing the storage environment for food.

[0008] Optionally, the controller is further configured to: Calculate the rate of temperature change based on the temperature data; Based on the temperature change rate and the current temperature value, a control command is generated to adjust the operating power of the fan, thereby adjusting the heat dissipation rate of the preservation space.

[0009] The controller calculates the rate of temperature change based on temperature data and generates control commands to adjust the operating power of the fan in conjunction with the current temperature value. This achieves automatic adaptation of heat dissipation speed, which helps to dynamically adjust the heat dissipation intensity according to the actual temperature rise trend of the preservation space, improves the response speed and precision of temperature control, and thus promotes the stability of the internal thermal environment of the preservation space.

[0010] Optionally, the number of vents is multiple, and the multiple vents are distributed in a ring array with the LED light source as the center.

[0011] By arranging multiple vents in a ring array around the LED light source, a uniform airflow channel is formed around the light source, promoting the uniform distribution of heat dissipation airflow on the surface of the sealing cover. This improves the consistency of heat dissipation, reduces the possibility of local heat accumulation, and enhances the uniformity of temperature field distribution within the preservation space.

[0012] Optionally, the air outlet of the fan corresponds to the vent hole on the sealing cover, so that the airflow generated by the fan can enter the preservation space through the vent hole and flow along the inner surface of the sealing cover.

[0013] By aligning the air outlet of the fan with the vent on the sealing cover, the airflow generated by the fan can be directed through the vent into the preservation space and flow along the inner surface of the sealing cover. This helps to enhance the contact between the airflow and the heating area of ​​the cover, improve heat exchange efficiency, thereby improving heat dissipation and promoting the removal of heat from the inside of the preservation space.

[0014] Optionally, the fan is a centrifugal fan or a vortex fan.

[0015] By using centrifugal fans or vortex fans as the heat dissipation airflow source, it is helpful to generate a stable airflow with a certain air pressure, thereby improving the efficiency of airflow through the vent holes of the sealed cover and flowing along its surface, optimizing the circulation effect of the heat dissipation airflow in the relatively closed preservation space, and playing a positive role in improving heat dissipation capacity and temperature uniformity.

[0016] Optionally, a sealing ring is also included; the sealing ring is disposed at the connection of the drawer to enhance the sealing of the preservation space.

[0017] By installing sealing rings at the drawer joints, the airtightness of the preservation space can be enhanced, reducing the exchange of air between the inside and outside, thereby slowing down the loss of humidity in the preservation space, improving the stability of the internal humidity environment, and playing a positive role in alleviating the drying phenomenon that food may cause due to humidity fluctuations.

[0018] A second aspect of this application provides a refrigerator, comprising: a cabinet and a storage device; the storage device is disposed inside the cabinet; the storage device includes at least one LED preservation zone with heat dissipation function as described in the first aspect.

[0019] By setting up the aforementioned LED preservation zone with heat dissipation function in the refrigerator storage unit, the refrigerator can provide a specific preservation space with active heat dissipation regulation and stable temperature control, thereby helping to alleviate the problem of local temperature rise caused by LED heat generation during light preservation and improving the overall stability and uniformity of the food storage environment.

[0020] A third aspect of this application provides a control method for an LED preservation zone with heat dissipation function, applied to the LED preservation zone with heat dissipation function described in the first aspect, the method comprising: Control the LED light source to turn on for light-based food preservation; Real-time acquisition of temperature data detected by temperature sensors; When the temperature rise in the temperature data exceeds the preset start threshold, the fan is controlled to start to dissipate heat. After the LED light source completes a preset working time, the LED light source is controlled to turn off. When the temperature value in the temperature data drops to a preset shutdown threshold, the fan is controlled to shut down.

[0021] By controlling the fan to start for heat dissipation based on the comparison between the temperature rise amplitude monitored in real time by the temperature sensor and the preset start threshold, and controlling the fan to shut down based on the temperature drop to the preset shut-off threshold after the light source is turned off, the linkage and matching between heat dissipation operation and light-induced heating process are realized. This helps to slow down the temperature rise rate in the preservation space when the LED light source is working, reduce heat dissipation lag, and thus improve the amplitude and frequency of temperature fluctuations inside the preservation space.

[0022] Optionally, after controlling the fan to start for heat dissipation, the method further includes: Calculate the rate of temperature change based on the temperature data; Based on the temperature change rate and the current temperature value, a control command is generated to adjust the operating power of the fan, thereby adjusting the heat dissipation rate of the preservation space.

[0023] By dynamically adjusting the fan operating power based on the rate of temperature change and the current temperature value, the matching and adjustment of heat dissipation speed and real-time heat load are achieved, which helps to improve the responsiveness and control accuracy of the heat dissipation process, thereby improving the uniformity of temperature field distribution in the preservation space and reducing instability caused by excessively fast or slow heat dissipation.

[0024] Optionally, the step of generating control commands for adjusting the operating power of the fan based on the temperature change rate and the current temperature value, so as to adjust the heat dissipation rate of the preservation space, includes: When the temperature rise detected by the temperature sensor reaches a first preset threshold, the fan is controlled to operate at a first power. When the temperature rise detected by the temperature sensor reaches a second preset threshold, the fan is controlled to operate at a second power greater than the first power. When the temperature rise detected by the temperature sensor reaches a third preset threshold, the fan is controlled to operate at a third power greater than the second power.

[0025] By setting a correspondence between multiple temperature rise thresholds and fan power, the heat dissipation intensity can be adjusted in stages, allowing the fan power to be adjusted adaptively according to the actual temperature rise. This helps to improve the precision of heat dissipation control, mitigate the problem of temperature regulation lag or overcooling that may be caused by a single heat dissipation intensity, and thus improve the stability of temperature changes in the preservation space.

[0026] As can be seen from the above technical solutions, this application provides an LED preservation zone with heat dissipation function, a control method, and a refrigerator. The LED preservation zone includes: a drawer, a sealing cover, an LED light source, vents, a fan, a temperature sensor, and a controller. The sealing cover is located on the top of the drawer and together with the drawer, forms a sealed preservation space. The LED light source is located on the side of the sealing cover facing the drawer. The vents are located on the sealing cover and arranged around the LED light source. The fan is located on the side of the sealing cover away from the drawer, and the fan's air outlet direction is towards the sealing cover. The temperature sensor is located on the side of the sealing cover facing the drawer. The controller is communicatively connected to the LED light source, the fan, and the temperature sensor. The controller receives temperature data detected by the temperature sensor and controls the on / off state of the LED light source and the start / stop of the fan based on the temperature data. This solves the problem of unstable temperature within the LED preservation zone. Attached Figure Description

[0027] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the refrigerator structure provided in an embodiment of this application; Figure 2 This is a schematic diagram of the storage device structure in a refrigerator provided in an embodiment of this application; Figure 3 A cross-sectional view (AA) of the storage device in a refrigerator with the drawer closed, provided in an embodiment of this application; Figure 4 A schematic diagram of the top structure of the sealing cover of the LED food preservation area with heat dissipation function provided in the embodiments of this application; Figure 5 A schematic diagram of the bottom structure of the sealing cover plate of the LED food preservation area with heat dissipation function provided in the embodiment of this application.

[0029] Illustration: Among them, 10-box body, 20-storage device, 21-fresh preservation area, 211-drawer, 212-sealing cover, 213-LED light source, 214-ventilation hole, 215-fan, 216-temperature sensor, 217-sealing ring. Detailed Implementation

[0030] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.

[0031] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0032] The terms "first," "second," "third," etc., used in this application specification and the aforementioned drawings are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0033] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0034] In this embodiment of the application, the refrigerator is generally provided with a refrigerator compartment and a freezer compartment.

[0035] The primary function of the refrigerator compartment is preservation. It is typically located in the upper part of the refrigerator and is designed to maintain a temperature above 0 degrees Celsius, usually between 2 and 8 degrees Celsius. This temperature range is sufficient to slow the growth of bacteria in food, thereby extending its shelf life while preserving its freshness and taste. Various perishable foods, such as vegetables, fruits, dairy products, cooked meats, and leftovers, can be stored in the refrigerator compartment.

[0036] The primary function of the freezer compartment is to freeze and store food for extended periods. It is typically located in the lower half of the refrigerator and is designed to operate at temperatures well below 0 degrees Celsius, generally below -18 degrees Celsius. At this extremely low temperature, the moisture in food freezes rapidly, effectively preventing bacterial growth and allowing food to be preserved for a long time without spoiling. Meat, fish, ice cream, and frozen foods can be stored in the freezer compartment for extended periods.

[0037] Refrigerators are used to store and extend the shelf life of fresh food. Utilizing light technology to promote photosynthesis in fruits and vegetables can effectively slow down their spoilage process and improve the preservation quality and nutritional value of the ingredients. Therefore, a dedicated zone with light-based preservation function is provided within the refrigerator to meet higher demands for fruit and vegetable preservation. In related embodiments, the refrigerator uses LED light sources to provide specific wavelengths of light to achieve the light-based preservation function. These light sources are typically arranged within the preservation zone, and the heat generated by the LEDs during operation is transferred to the surrounding air through natural heat dissipation. For example, in a sealed drawer structure, the LED light source is in direct contact with the air, and heat is dissipated with the help of heat-conducting elements. However, in the above structure, due to the poor air circulation within the preservation zone, the heat generated by the LED light source is difficult to dissipate quickly, leading to problems such as localized overheating and large temperature fluctuations within the zone. Especially for leafy vegetables, temperature fluctuations can easily cause moisture loss and wilting, affecting the preservation effect. Therefore, how to effectively control the temperature stability within the zone without affecting the light-based preservation function has become a technical problem that needs to be solved.

[0038] To address the issue of unstable temperature within the LED preservation area, see [link / reference]. Figures 1-5 This application provides an LED food preservation zone with heat dissipation function, including: drawer 211, sealing cover 212, LED light source 213, vent 214, fan 215, temperature sensor 216 and controller.

[0039] A sealing cover 212 is provided on the top of drawer 211 and together with drawer 211 forms a sealed preservation space.

[0040] It should be understood that a sealed preservation space does not mean a completely absolute seal, but rather that when the drawer is normally closed, a relatively enclosed environment is formed by the cooperation between the sealing cover 212 and the edge of the drawer 211, such as by setting a sealing strip, so as to reduce the influence of the external environment on the temperature and humidity inside the preservation space, while providing a relatively independent space for the lighting of the LED light source 213 and the heat dissipation airflow circulation of the fan 215.

[0041] LED light source 213 is located on the side of sealing cover 212 facing drawer 211; vent 214 is opened on sealing cover 212 and arranged around LED light source 213.

[0042] Specifically, the number, diameter, and distribution of the vents 214 can be designed according to the power and heat generation of the LED light source 213 and the size of the sealing cover 212. For example, multiple circular or strip-shaped vents 214 can be evenly opened on both sides or around the LED light source 213, so that the airflow generated by the fan 215 can be effectively blown onto the surface of the LED light source 213 and its surrounding area through these vents 214, thereby carrying away the heat generated by the LED light source 213 during operation in a timely manner and forming a certain airflow circulation in the preservation space to avoid heat accumulation in local areas.

[0043] The fan 215 is located on the side of the sealing cover 212 facing away from the drawer 211, and the air outlet direction of the fan 215 is towards the sealing cover 212.

[0044] Specifically, the air outlet of the fan 215 can be directly facing the area where the vent 214 is located on the sealing cover 212, or the air can be guided to the vicinity of the vent 214 through an air guide structure, ensuring that most of the airflow generated by the fan 215 can enter the interior of the preservation space through the vent 214 and directly act on the LED light source 213 for heat dissipation. The installation position of the fan 215 should facilitate the intake of air from other areas of the refrigerator, such as the refrigerator compartment or a dedicated air intake channel, and after being pressurized by the fan 215, blown towards the sealing cover 212.

[0045] Temperature sensor 216 is located on the side of sealing cover 212 facing drawer 211 and is used to detect the temperature of the preservation space. The controller is communicatively connected to LED light source 213, fan 215 and temperature sensor 216 respectively. The controller is configured to receive temperature data detected by temperature sensor 216 and control the on / off state of LED light source 213 and the start / stop of fan 215 based on temperature data.

[0046] By setting up an LED light source 213 in the preservation space and cooperating with a fan 215, and achieving linkage control with a controller through a temperature sensor 216, the light source and fan can be adjusted according to real-time temperature data. This helps to improve the heat dissipation effect in the preservation space, alleviate the problem of excessively high local temperature, reduce temperature fluctuations, and improve the internal temperature uniformity and stability, thereby optimizing the food storage environment.

[0047] In some embodiments, the controller is also configured to calculate the rate of temperature change based on temperature data.

[0048] It should be understood that the rate of temperature change specifically refers to how quickly the temperature in the preservation space rises or falls within a preset time interval. The controller continuously receives temperature data from the temperature sensor 216, for example, setting a sampling period of 10 seconds or 30 seconds, and records the temperature value for each period. Then, the controller calculates the amount of temperature change per unit time by dividing the temperature difference between two or more adjacent sampling periods by the corresponding time interval; this is the rate of temperature change. For example, if the temperature rises from 5℃ to 5.5℃ in 10 seconds, the rate of temperature change is (5.5℃ - 5℃) / 10 seconds = 0.05℃ / second. By calculating this rate of temperature change, the controller can more accurately predict the temperature trend within the preservation space, rather than simply controlling it based on the current static temperature value, thereby achieving a more refined and forward-looking adjustment strategy for the LED light source 213 and the fan 215.

[0049] Based on the rate of temperature change and the current temperature value, control commands are generated to adjust the operating power of the fan 215 in order to regulate the heat dissipation rate of the preservation space.

[0050] The controller calculates the rate of temperature change based on temperature data and generates control commands to adjust the operating power of the fan 215 in conjunction with the current temperature value. This achieves automatic adaptation of heat dissipation speed, which helps to dynamically adjust the heat dissipation intensity according to the actual temperature rise trend of the preservation space, improves the response speed and precision of temperature control, and thus promotes the stability of the internal thermal environment of the preservation space.

[0051] In some embodiments, there are multiple vent holes 214, which are arranged in a ring array around the LED light source 213.

[0052] By arranging multiple vents 214 in a ring array around the LED light source 213, it helps to form a uniform airflow channel around the light source, promotes the uniform distribution of heat dissipation airflow on the surface of the sealing cover 212, thereby improving the consistency of heat dissipation effect, reducing the possibility of local heat accumulation, and enhancing the uniformity of temperature field distribution in the preservation space.

[0053] In some embodiments, the air outlet of the fan 215 corresponds to the vent 214 on the sealing cover 212, so that the airflow generated by the fan 215 can enter the preservation space through the vent 214 and flow along the inner surface of the sealing cover 212.

[0054] By aligning the air outlet of the fan 215 with the vent 214 on the sealing cover 212, the airflow generated by the fan 215 can be directed through the vent 214 into the preservation space and flow along the inner surface of the sealing cover 212. This helps to enhance the contact between the airflow and the heating area of ​​the cover, improve the heat exchange efficiency, thereby improving the heat dissipation effect and promoting the removal of heat from the inside of the preservation space.

[0055] In some embodiments, the fan 215 is a centrifugal fan or a vortex fan.

[0056] It should be understood that centrifugal fans and vortex fans are both types of fans with high static pressure and low flow rate. This characteristic enables them to effectively overcome the resistance encountered by the airflow in the flow path through directional airflow in the relatively enclosed environment of the preservation space, ensuring that sufficient air volume enters the preservation space through the vent 214 and flows along the inner surface of the sealing cover 212, thereby achieving efficient heat exchange and heat dissipation.

[0057] By using centrifugal fans or vortex fans as the heat dissipation airflow source, it is helpful to generate a stable airflow with a certain air pressure, thereby improving the efficiency of airflow through the vent 214 of the sealing cover plate 212 and flowing along its surface, optimizing the circulation effect of the heat dissipation airflow in the relatively closed preservation space, and playing a positive role in improving heat dissipation capacity and temperature uniformity.

[0058] In some embodiments, a sealing ring 217 is also included; the sealing ring 217 is disposed at the connection of the drawer 211 to enhance the sealing of the preservation space.

[0059] By setting a sealing ring 217 at the connection of drawer 211, the airtightness of the preservation space is enhanced, the exchange of air between the inside and outside is reduced, thereby slowing down the loss of humidity in the preservation space, improving the stability of the internal humidity environment, and playing a positive role in alleviating the drying phenomenon that food may be caused by humidity fluctuations.

[0060] This application also provides a refrigerator in some embodiments, including: a cabinet 10 and a storage device 20; the storage device 20 is disposed inside the cabinet 10; the storage device 20 includes at least one LED preservation zone 21 with heat dissipation function as described in the above embodiments.

[0061] By setting the aforementioned LED preservation zone 21 with heat dissipation function in the refrigerator storage unit 20, the refrigerator can provide a specific preservation space with active heat dissipation regulation and temperature stability control, thereby helping to alleviate the problem of local temperature rise caused by LED heat generation during light preservation and improving the overall stability and uniformity of the food storage environment.

[0062] This application also provides a control method for an LED preservation zone with heat dissipation function in some embodiments, applied to the LED preservation zone with heat dissipation function described in the above embodiments, the method including: S100: Controls the LED light source 213 to turn on for light-based preservation.

[0063] Specifically, controlling the LED light source 213 to perform light-based preservation refers to activating the LED light source 213 within the LED preservation zone 21 according to a preset preservation strategy or user instructions. This allows the LED light source 213 to irradiate the food within the zone according to specific light parameters, such as light intensity, light cycle, and spectral combination. This utilizes photobiological effects to promote photosynthesis, regulate physiological metabolism, or inhibit the growth of pathogens, thereby extending the shelf life and maintaining the quality of the food. For example, for leafy vegetables, a specific combination of blue and red light can be selected and intermittently irradiated under suitable light intensity to maintain their chlorophyll content and nutritional components.

[0064] S200: Real-time acquisition of temperature data detected by temperature sensor 216.

[0065] It should be understood that real-time acquisition of temperature data detected by temperature sensor 216 means that throughout the entire process of LED light source 213 being turned on for light-based preservation, the temperature sensor 216, located inside the LED preservation zone 21 (usually near the LED light source 213 or the food storage area) to accurately reflect the impact of light source heat on the local ambient temperature, continuously monitors the real-time temperature of that area and converts the detected temperature signal into an electrical or digital signal, transmitting it to the controller in real time. The controller collects and processes this continuous temperature data as a direct basis for determining whether heat dissipation needs to be activated. Here, "real-time" typically requires a sufficiently high temperature data sampling frequency to ensure that temperature change trends are captured promptly, avoiding missing abnormal temperature rises due to excessively long sampling intervals.

[0066] S300: When the temperature rise in the temperature data exceeds the preset start threshold, control the fan 215 to start for heat dissipation.

[0067] It should be understood that the temperature rise refers to the increase in real-time temperature detected after the LED light source 213 is turned on compared to the initial ambient temperature before the LED light source 213 was turned on, or a certain set reference temperature. The preset start-up threshold is a temperature difference critical value pre-set by the system. The setting of this threshold takes into account factors such as the heating characteristics of the LED light source 213, the temperature sensitivity of the food, and the heat preservation performance of the special zone. For example, if the start-up threshold is set to 2℃, when the temperature sensor 216 detects that the temperature in the special zone has risen by 2℃ or more compared to before the LED was turned on, the controller determines that the heating of the LED light source 213 has adversely affected the preservation environment, and then issues a control command to start the cooling fan 215 set in the special zone. After the fan 215 is started, by accelerating the air circulation inside and outside the special zone, or by promoting the air circulation in the special zone through the heat dissipation components, the heat generated by the LED light source 213 is discharged or carried away in a timely manner, thereby reducing the ambient temperature in the special zone.

[0068] S400: After the LED light source 213 completes the preset working time, control the LED light source 213 to turn off.

[0069] It should be understood that the preset working time is a time parameter pre-set based on the optimal light preservation requirements of different ingredients and the recommended working duration of the LED light source 213. This working time can be a fixed duration, such as 8 hours, or a variable duration that is dynamically adjusted according to the type of ingredients, their initial state, or environmental conditions. When the LED light source 213 has been working continuously according to the preset light parameters for the preset working time, the controller issues a shutdown command to cut off the power supply to the LED light source 213, thus stopping its illumination. This step ensures that the ingredients are not exposed to excessive light, while also saving energy and reducing unnecessary heat generation.

[0070] S500: When the temperature value in the temperature data drops to the preset shutdown threshold, control the fan 215 to shut down.

[0071] It should be understood that the preset shutdown threshold is another pre-set temperature critical value, which is usually close to or slightly higher than the initial ambient temperature before the LED light source 213 is turned on, or set to a value within the suitable storage temperature range for the food. After the fan 215 starts to dissipate heat, the temperature in the designated area will gradually decrease. When the controller detects through the temperature sensor 216 that the real-time temperature has dropped to this preset shutdown threshold, it indicates that the temperature in the designated area has returned to a safe level, the extra heat generated by the LED light source 213 has been effectively dissipated, and it is unnecessary to continue running the fan 215. Therefore, the controller then issues a command to control the fan 215 to shut down, in order to avoid energy consumption and unnecessary noise caused by the ineffective operation of the fan 215. For example, if the shutdown threshold is set to 6°C, then the fan 215 will shut down when the temperature drops to 6°C.

[0072] By comparing the temperature rise amplitude monitored in real time by temperature sensor 216 with the preset start threshold, the fan 215 is controlled to start heat dissipation. After the light source is turned off, the fan 215 is controlled to turn off based on the temperature dropping to the preset shut-off threshold. This achieves linkage matching between heat dissipation operation and light-induced heating process, which helps to alleviate the temperature rise rate in the preservation space when the LED light source 213 is working, reduce heat dissipation lag, and thus improve the amplitude and frequency of temperature fluctuations inside the preservation space.

[0073] In some embodiments, after controlling the fan 215 to start for heat dissipation, the method further includes: Calculate the rate of temperature change based on the temperature data.

[0074] Based on the rate of temperature change and the current temperature value, control commands are generated to adjust the operating power of the fan 215 in order to regulate the heat dissipation rate of the preservation space.

[0075] By dynamically adjusting the operating power of the fan 215 based on the rate of temperature change and the current temperature value, the matching and adjustment of the heat dissipation speed and the real-time heat load are achieved, which helps to improve the responsiveness and control accuracy of the heat dissipation process, thereby improving the uniformity of the temperature field distribution in the preservation space and reducing instability caused by excessively fast or slow heat dissipation.

[0076] In some embodiments, the step of generating control commands for adjusting the operating power of the fan 215 based on the rate of temperature change and the current temperature value to adjust the heat dissipation rate of the preservation space includes: When the temperature rise detected by the temperature sensor 216 reaches the first preset threshold, the fan 215 is controlled to run at the first power. When the temperature rise detected by the temperature sensor 216 reaches the second preset threshold, the fan 215 is controlled to run at a second power greater than the first power. When the temperature rise detected by the temperature sensor 216 reaches the third preset threshold, the fan 215 is controlled to operate at a third power greater than the second power.

[0077] It should be understood that the temperature rise specifically refers to the increase in the real-time temperature of the inner surface of the sealing cover 212 detected by the temperature sensor 216 after the LED light source 213 is activated, relative to the initial temperature of the inner surface before the LED light source 213 is activated. The first preset threshold can be selected as 2℃; the second preset threshold can be selected as 3℃; and the third preset threshold can be selected as 5℃. The specific values ​​of the first power, second power, and third power depend on the motor parameters and design characteristics of the fan 215. Generally, the power of the fan is positively correlated with its rotational speed. Within a certain speed range, its power calculation formula can be approximately expressed as P=K×n. 3Where P is power, n is rotational speed, and K is a constant related to factors such as the fan impeller and wind resistance. In this embodiment, when the fan 215 rotates at a first speed of 1000 rpm, the corresponding first power, after testing and calculation, is, for example, 15W. When the speed increases to a second speed of 1500 rpm, due to the increased speed, the motor output torque and power consumption increase accordingly, and the second power becomes, for example, 33.75W. This value is calculated based on the above approximate formula and the assumed K value. In actual applications, it needs to be determined according to the specific fan model and performance parameters. When the speed reaches a third speed of 2000 rpm, the third power further increases, for example, to 48W, which is also an example calculation result based on the assumed K value. These specific power values ​​are obtained during the fan selection and system commissioning phases by measuring the fan input current and voltage at different speeds, and combining the P=UI formula, neglecting the influence of the power factor, through simplified calculations or more precise power meter measurements, to ensure that the fan 215 operates stably and efficiently at each speed level, meeting the heat dissipation requirements under different temperature rise conditions.

[0078] By setting a correspondence between multiple temperature rise thresholds and fan power, the heat dissipation intensity can be adjusted in stages, allowing the fan power to be adjusted adaptively according to the actual temperature rise. This helps to improve the precision of heat dissipation control, mitigate the problem of temperature regulation lag or overcooling that may be caused by a single heat dissipation intensity, and thus improve the stability of temperature changes in the preservation space.

[0079] As can be seen from the above technical solutions, the embodiments of this application provide an LED preservation zone with heat dissipation function, a control method, and a refrigerator. The LED preservation zone includes: a drawer 211, a sealing cover 212, an LED light source 213, a vent 214, a fan 215, a temperature sensor 216, and a controller; the sealing cover 212 is disposed on the top of the drawer 211 and together with the drawer 211 forms a sealed preservation space; the LED light source 213 is disposed on the side of the sealing cover 212 facing the drawer 211; the vent 214 is opened on the sealing cover 211. 2. An LED light source 213 is arranged around the sealing cover 212; a fan 215 is located on the side of the sealing cover 212 facing away from the drawer 211, and the air outlet direction of the fan 215 is towards the sealing cover 212; a temperature sensor 216 is located on the side of the sealing cover 212 facing the drawer 211; a controller is communicatively connected to the LED light source 213, the fan 215, and the temperature sensor 216 respectively; the controller receives temperature data detected by the temperature sensor 216 and controls the on / off state of the LED light source 213 and the start / stop of the fan 215 based on the temperature data. This solves the problem of unstable temperature in the LED preservation zone. Similar parts between the embodiments provided in this application can be referred to mutually. The specific embodiments provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other embodiments extended from the solution of this application without creative effort are within the protection scope of this application.

Claims

1. An LED food preservation zone with heat dissipation function, characterized in that, include: Drawer (211), sealing cover (212), LED light source (213), vent (214), fan (215), temperature sensor (216) and controller; The sealing cover (212) is located on the top of the drawer (211) and together with the drawer (211) forms a sealed preservation space; The LED light source (213) is located on the side of the sealing cover (212) facing the drawer (211); The vent (214) is formed on the sealing cover (212) and arranged around the LED light source (213); The fan (215) is located on the side of the sealing cover (212) facing away from the drawer (211), and the air outlet direction of the fan (215) is towards the sealing cover (212). The temperature sensor (216) is disposed on the side of the sealing cover (212) facing the drawer (211) for detecting the temperature of the preservation space; The controller is communicatively connected to the LED light source (213), the fan (215), and the temperature sensor (216); The controller is configured to receive temperature data detected by the temperature sensor (216) and control the on / off state of the LED light source (213) and the start / stop of the fan (215) based on the temperature data.

2. The LED food preservation zone with heat dissipation function according to claim 1, characterized in that, The controller is also configured to: Calculate the rate of temperature change based on the temperature data; Based on the temperature change rate and the current temperature value, a control command is generated to adjust the operating power of the fan (215) to regulate the heat dissipation rate of the preservation space.

3. The LED food preservation zone with heat dissipation function according to claim 1, characterized in that, The number of ventilation holes (214) is multiple, and the multiple ventilation holes (214) are distributed in a ring array with the LED light source (213) as the center.

4. The LED food preservation zone with heat dissipation function according to claim 1, characterized in that, The air outlet of the fan (215) corresponds to the vent (214) on the sealing cover (212) so that the airflow generated by the fan (215) can enter the preservation space through the vent (214) and flow along the inner surface of the sealing cover (212).

5. The LED food preservation zone with heat dissipation function according to claim 1, characterized in that, The fan (215) is a centrifugal fan or a vortex fan.

6. The LED food preservation zone with heat dissipation function according to claim 1, characterized in that, It also includes a sealing ring (217); The sealing ring (217) is disposed at the connection between the drawer (211) and the sealing cover (212) to enhance the sealing of the preservation space.

7. A control method for an LED food preservation zone with heat dissipation function, characterized in that, The method, applied to the LED food preservation zone with heat dissipation function as described in any one of claims 1 to 6, comprises: Control the LED light source (213) to turn on for light-based preservation; Real-time acquisition of temperature data detected by temperature sensor (216); When the temperature rise in the temperature data exceeds the preset start threshold, the fan (215) is started to dissipate heat. After the LED light source (213) completes the preset working time, the LED light source (213) is controlled to be turned off; When the temperature value in the temperature data drops to a preset shutdown threshold, the fan (215) is controlled to shut down.

8. The control method for the LED preservation zone with heat dissipation function according to claim 7, characterized in that, After the control fan (215) is started for heat dissipation, the method further includes: Calculate the rate of temperature change based on the temperature data; Based on the temperature change rate and the current temperature value, a control command is generated to adjust the operating power of the fan (215) to regulate the heat dissipation rate of the preservation space.

9. The control method for the LED preservation zone with heat dissipation function according to claim 8, characterized in that, The step of generating control commands for adjusting the operating power of the fan (215) based on the temperature change rate and the current temperature value to adjust the heat dissipation rate of the preservation space includes: When the temperature rise detected by the temperature sensor (216) reaches a first preset threshold, the fan (215) is controlled to operate at a first power. When the temperature rise detected by the temperature sensor (216) reaches the second preset threshold, the fan (215) is controlled to operate at a second power greater than the first power. When the temperature rise detected by the temperature sensor (216) reaches the third preset threshold, the fan (215) is controlled to operate at a third power greater than the second power.

10. A refrigerator, characterized in that, include: Box (10) and storage device (20); The storage device (20) is disposed inside the box (10); The storage device (20) includes at least one LED preservation zone (21) with heat dissipation function as described in any one of claims 1 to 6.

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