Ambient lighting display case that can be temperature adjusted according to ambient light and method of use

Abstract

The embodiment of the application provides an ambient lighting showcase capable of adjusting temperature according to ambient light and a use method thereof, and belongs to the technical field of showcases. The showcase comprises an ambient light sensing module, a full-spectrum warm light lighting module, a transparent spectrum frequency division heat capturing module, an active heat pump heat and directional heat exhaust module, a display bin temperature control module and an intelligent collaborative control module. The full-spectrum warm light lighting module is directly arranged above the inside of the display bin and emits warm light containing near-infrared components. The transparent spectrum frequency division heat capturing module is located in the light path and intercepts near-infrared light by means of a spectrum frequency division film layer on a transparent heat conduction substrate. The cold end of a semiconductor refrigeration sheet of the active heat pump heat and directional heat exhaust module is thermally coupled with the edge of the transparent heat conduction substrate, and the intercepted heat is forcedly exhausted to the outside of the showcase. The intelligent collaborative control module synchronously and jointly adjusts the lighting color temperature and the heat exhaust power according to the color temperature and the illumination of the external ambient light.

Description

Technical Field

[0001] This invention relates to the field of display cabinet technology, and more specifically, to a display cabinet with temperature control function, particularly an ambient lighting display cabinet that can adjust the temperature according to ambient light and its usage method. Background Technology

[0002] In the high-end retail industry, for the display of temperature-sensitive exhibits such as fine chocolates, high-end cosmetics, and jewelry, display cases need to meet two core requirements: first, to create an atmosphere that attracts consumers through high-quality warm-toned lighting; and second, to maintain a precise temperature environment inside the display case to protect the quality of the exhibits.

[0003] However, these two requirements are physically contradictory. Warm-colored light, especially low-color-temperature (2200K-4000K) full-spectrum light that can give exhibits a realistic and attractive texture, is rich in near-infrared components. These near-infrared components act directly on the surface of exhibits in the form of thermal radiation, causing local temperature rises that are difficult to compensate for through overall space cooling. For extremely temperature-sensitive exhibits such as chocolate, temperature fluctuations exceeding 2°C may cause fat blooming, affecting their commercial value.

[0004] Therefore, the industry has long used the "physical isolation" method, which means that lighting fixtures must be used as internal heat sources and strictly physically isolated from the exhibit storage area by setting up independent lamp rooms, embedding foam layers, or using fiber optic light guides. Another method is "cold light preference", which means that when lighting must be set up near the exhibit area, high color temperature (above 5000K) cold light sources should be selected, and the use of warm color light sources that emit strong heat radiation should be strictly limited or even prohibited.

[0005] In the prior art, such as the Chinese patent document with publication number CN212300588U, a display cabinet with light heat insulation function is disclosed. It sets up a "heat insulation and light transmission plate" between the lamp chamber and the display space and combines it with a fan for circulating heat dissipation. This solution is essentially a passive physical heat insulation and does not perform spectral-level active processing on the inherent infrared radiation in warm light. The heat dissipation efficiency is limited by air convection, making it difficult to cope with the heat accumulated in high-efficiency lighting scenarios, and it cannot achieve active and synchronous heat compensation according to changes in ambient light.

[0006] This invention is an improvement made to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an ambient lighting display case that can adjust the temperature according to ambient light and its usage method. By implementing this invention, the aim is to solve the technical problem in the prior art that it is impossible to directly illuminate temperature-sensitive exhibits with full-spectrum warm light containing infrared components without generating additional heat load on the exhibits, and to synchronously adjust the atmosphere and thermal balance according to changes in ambient light.

[0008] To achieve the aforementioned objective, in a first aspect, embodiments of the present invention provide an ambient lighting display cabinet with adjustable temperature according to ambient light, the technical solution of which is: It includes an ambient light sensing module, a full-spectrum warm light illumination module, a transparent spectral frequency division heat capture module, an active heat pump heat and directional heat dissipation module, a display chamber temperature control module, and an intelligent collaborative control module.

[0009] The full-spectrum warm light illumination module is directly installed inside the upper part of the display chamber, emitting warm light with adjustable color temperature and containing visible and near-infrared components directly towards the exhibits.

[0010] The transparent spectral frequency division heat capture module is set in the optical path of the warm light and includes a transparent thermally conductive substrate and a spectral frequency division film. The spectral frequency division film has a higher transmittance for the visible light band than for the near-infrared band, thereby reflecting and intercepting the near-infrared component in the warm light into the transparent thermally conductive substrate, while allowing the visible light component to pass through to illuminate the exhibit.

[0011] The active thermoelectric pump heat dissipation and directional heat removal module includes a thermoelectric cooler (TEC), whose cold end is thermally coupled to at least one edge region of a transparent thermally conductive substrate, and whose hot end is connected to the outside of the cabinet through a heat dissipation channel to forcibly remove the heat intercepted by the transparent thermally conductive substrate. The intelligent collaborative control module is signal-connected to the ambient light sensing module, the full-spectrum warm light lighting module, the active thermoelectric pump heat dissipation and directional heat removal module, and the display compartment temperature control module. It is configured to synchronously adjust the color temperature output of the full-spectrum warm light lighting module and the pumping power of the active thermoelectric pump heat dissipation and directional heat removal module in response to the color temperature and illuminance of the ambient light outside the display compartment detected by the ambient light sensing module.

[0012] Optionally, the transparent thermally conductive substrate is sapphire glass or alumina ceramic glass, with a visible light transmittance of not less than 92% and a thermal conductivity of not less than 25 W / (m·K).

[0013] Optionally, a spectral frequency division film is deposited on the lower surface of a transparent thermally conductive substrate, with a transmittance of not less than 95% for light in the 400nm to 700nm wavelength band and a reflectance of not less than 90% for light with a wavelength above 700nm.

[0014] Optionally, a transparent heat distribution layer is also provided on the inner or upper surface of the transparent thermally conductive substrate. The transparent heat distribution layer includes a graphene film or an indium tin oxide (ITO) transparent conductive film, which is used to quickly conduct the heat generated by infrared reflection in the central area of ​​the transparent thermally conductive substrate to the edge area.

[0015] Optionally, the cold end of the semiconductor cooling chip is connected to the edge region of the transparent thermally conductive substrate via an indium foil or a thermally conductive silicone grease layer to achieve a soft thermal coupling with low thermal resistance.

[0016] Optionally, a micro-gap with a width of 0.5 mm to 2 mm is formed between the lower surface of the full-spectrum warm light illumination module and the upper surface of the transparent spectral frequency division heat capture module. This micro-gap constitutes an optical buffer and primary thermal barrier layer, ensuring the smooth flow of light and reducing the direct conduction of heat from the light source panel to the transparent spectral frequency division heat capture module.

[0017] Optionally, the intelligent collaborative control module has built-in anti-condensation control logic, which is configured to: acquire real-time temperature and humidity data inside and outside the display cabinet, calculate the real-time dew point temperature, and dynamically limit the cold end working temperature of the semiconductor cooling chip to maintain it within a preset range higher than the real-time dew point temperature, such as the range of 1°C to 2°C.

[0018] The above technical solution has produced at least the following beneficial technical effects: By coupling the cold end of the active thermoelectric pump heat and the directional heat dissipation module to the edge of the transparent thermally conductive substrate, instead of cooling the LED chip substrate or air in the traditional solution, this structural layout solves the technical problem of reflected heat accumulating in the top space of the enclosed display case and generating secondary radiation backflow. It can directly use full-spectrum warm light containing infrared components to shine directly on exhibits in the precision temperature-controlled display chamber, taking into account both high color rendering and high temperature constant accuracy.

[0019] On the other hand, a temperature control method for an ambient lighting display case that can adjust its temperature according to ambient light is also provided, applicable to any of the display cases described above. This temperature control method includes: The system acquires the color temperature and illuminance of the ambient light outside the display case; determines the target lighting color temperature value based at least on the color temperature and illuminance; determines the expected infrared heat generation power of the full-spectrum warm light lighting module under the target lighting color temperature value according to the target lighting color temperature value and a preset mapping relationship; simultaneously, it sends a first command to the full-spectrum warm light lighting module to adjust it to the target lighting color temperature value, and sends a second command to the active thermoelectric pump and directional heat dissipation module to preset it to the target pumping power that matches the infrared heat generation power; acquires the actual temperature inside the display case, calculates the deviation between the actual temperature and the target temperature, and performs feedback fine-tuning of the pumping power of the active thermoelectric pump and directional heat dissipation module based on the deviation value.

[0020] Optionally, the preset mapping relationship is a pre-calibrated lookup table (LUT), which stores the estimated infrared heat generation power values ​​corresponding to the full-spectrum warm light illumination module under different color temperature and brightness combinations.

[0021] Optionally, the target pump heat power P TEC_ff Calculate using the following formula:

[0022] in P IR_est For infrared heat generation power, α The heat capture efficiency coefficient and 0<α≤1，β The feedforward coefficient for the rate of change. This represents the time-varying rate of infrared heat generation power.

[0023] The above temperature control method has produced at least the following beneficial technical effects: By using feedforward prediction based on the color temperature and illuminance of the external ambient light, the infrared heat to be generated is predicted in advance and the heat dissipation power is preset simultaneously, reducing the thermal lag caused by the traditional temperature control system's reliance on detecting temperature deviations before making feedback adjustments; the thermal compensation is put in place simultaneously the instant the lighting atmosphere changes, which can suppress the temperature fluctuation of exhibits during the lighting change process to a small range.

[0024] Furthermore, the above summary does not enumerate all the features required for embodiments of the present invention, and other combinations of these feature groups may also constitute embodiments of the present invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings used in the embodiments of the present invention or the background art will be described below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an exploded view of the modular linkage architecture of an ambient lighting display cabinet that can adjust the temperature according to ambient light, as provided in one embodiment of this application. Figure 2 This is an enlarged schematic diagram of the layer structure of a transparent spectral frequency division heat capture module provided in an embodiment of this application; Figure 3 This is a schematic diagram of the feedforward and feedback dual-loop control principle of an intelligent collaborative control module provided in an embodiment of this application; Figure 4 This is a schematic flowchart of a temperature control method for an ambient lighting display cabinet that can adjust the temperature according to ambient light, provided in one embodiment of this application. Figure 5 This is a schematic diagram of the transmittance / reflectance-wavelength curve of a spectral frequency division film provided in an embodiment of this application.

[0027] In the attached diagram, 1-Ambient light sensing module; 2-Full-spectrum warm light illumination module; 3-Transparent spectral frequency division heat capture module; 31-Transparent thermally conductive substrate; 32-Spectral frequency division film layer; 33-Transparent heat distribution layer; 34-Micro air gap; 4-Active thermoelectric pump heat and directional heat dissipation module; 5-Exhibition chamber temperature control module; 6-Intelligent collaborative control module; 7-Exhibition chamber; 8-Cabinet. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of the embodiments of the present invention easier to understand, the embodiments of the present invention are further described below in conjunction with the figures and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the embodiments of the present invention and are not intended to limit the embodiments of the present invention.

[0029] In this embodiment, for ease of description, the side of the display case facing the external environment is defined as "outside," and the side facing the interior of the display compartment and the exhibits is defined as "inside" or "below." It is understood that these directional terms are only used to more clearly describe the structural relationships and do not constitute a limitation on the specific usage posture.

[0030] Example 1 This embodiment provides an ambient lighting display case with adjustable temperature according to ambient light. See [link / reference]. Figure 1 As shown, the display compartment 7 of the display case is used to store exhibits (not shown in the figure), and specifically includes: an ambient light sensing module 1, a full-spectrum warm light illumination module 2, a transparent spectral frequency division heat capture module 3, an active thermoelectric pump heat and directional heat dissipation module 4, a display compartment temperature control module 5, and an intelligent collaborative control module 6. The full-spectrum warm light illumination module 2 is directly installed on the top inside the display compartment 7, illuminating the exhibits below. The full-spectrum warm light illumination module 2 is a full-spectrum LED array with a color temperature that is continuously adjustable between 2200K and 4000K and a color rendering index (CRI) of not less than 95. The spectral output of this LED array is designed to retain near-infrared components with wavelengths above 700nm. In this embodiment, the maximum rated power of the full-spectrum warm light illumination module 2 is 60W.

[0031] The transparent spectral frequency division heat capture module 3 is positioned directly below the full-spectrum warm light illumination module 2 and directly above the exhibit, within the illumination path. (See also...) Figure 2As shown, the transparent spectral frequency division heat capture module 3 includes a transparent thermally conductive substrate 31 and a spectral frequency division film layer 32. A micro-gap 34 with a width D of 0.5 mm to 2 mm is maintained between the lower surface of the full-spectrum warm light illumination module 2 and the upper surface of the transparent spectral frequency division heat capture module 3. This micro-gap 34 forms an optical buffer layer in the optical path direction, reducing optical loss caused by direct contact between the full-spectrum warm light illumination module 2 and the transparent spectral frequency division heat capture module 3; and forms a primary thermal barrier layer in the thermal path direction, weakening the direct conduction of heat from the full-spectrum warm light illumination module 2 panel to the transparent spectral frequency division heat capture module 3.

[0032] The transparent thermally conductive substrate 31 needs to have both high light transmittance and high thermal conductivity. In this embodiment, the transparent thermally conductive substrate 31 is made of sapphire glass, which has a visible light transmittance of 92.5%, a thermal conductivity of approximately 35 W / (m·K), and a thickness of 2 mm.

[0033] It is understood that in some other feasible embodiments, the transparent thermally conductive substrate 31 may also be made of high-transmittance alumina ceramic glass, as long as its visible light transmittance is not less than 92% and its thermal conductivity is not less than 25 W / (m·K).

[0034] A spectral frequency division film 32 is deposited on the lower surface of the transparent thermally conductive substrate 31. (See also...) Figure 5 As shown, the optical properties of this film are as follows: it has high transmittance in the visible light band with wavelengths from 400nm to 700nm, and transmittance of not less than 95% in the deep red to far-red band (620nm to 700nm); it has high reflectance in the near-infrared band with wavelengths above 700nm, with a reflectance of not less than 90%. The cutoff wavelength for its spectral frequency division is controlled within the range of 700nm ± 10nm. Using this structure, the visible light component used to create atmosphere in warm-colored light penetrates the transparent spectral frequency division heat capture module 3 and illuminates the exhibit, while near-infrared thermal radiation is reflected back into the transparent thermally conductive substrate 31 and intercepted.

[0035] In one feasible embodiment, the active thermoelectric pump heat dissipation and directional heat removal module 4 includes a thermoelectric cooler, a heat dissipation channel, and an external heat dissipation fin assembly. The cold end of the thermoelectric cooler is thermally coupled to at least one edge region of the transparent thermally conductive substrate 31 of the transparent spectral frequency division heat capture module 3. To mitigate the thermal stress problem of the transparent thermally conductive substrate 31 that may be caused by radial temperature gradients, see [reference needed]. Figure 2 A transparent thermal uniform distribution layer 33 is added to the upper surface (i.e., the uncoated side) of the transparent thermally conductive substrate 31. This transparent thermal uniform distribution layer 33 can be a graphene film or an indium tin oxide (ITO) transparent conductive film. The transparent thermal uniform distribution layer 33 utilizes its in-plane thermal conductivity to laterally conduct the heat accumulated in the central region of the transparent thermally conductive substrate 31 due to infrared reflection to the edge region coupled with the cold end of the semiconductor cooling chip, thereby reducing the thermal gradient.

[0036] In one feasible implementation, the cold end of the thermoelectric cooler is mechanically and thermally coupled to the edge of the transparent thermally conductive substrate 31 via indium foil or high thermal conductivity silicone grease. The hot end of the thermoelectric cooler pumps the intercepted heat to a heat dissipation fin assembly mounted on the outside of the cabinet 8 via a heat dissipation channel. The entire path constitutes a forced heat transport direction: from the space above the exhibit → transparent thermally conductive substrate 31 → thermoelectric cooler pump → external environment of the cabinet 8, which directs heat outward and physically reduces the backflow of external heat and internal heat accumulation into the exhibit area through secondary radiation.

[0037] The display compartment temperature control module 5 is used to maintain the basic set temperature inside the display compartment 7. In this embodiment, the display compartment temperature control module 5 is a semiconductor refrigeration module, which is responsible for handling the steady-state basic heat load caused by heat transfer from the wall of the cabinet 8 and heat exchange from opening the door. Its target temperature adjustable range is 10°C to 25°C.

[0038] The intelligent collaborative control module 6 is a microprocessor that is connected to the ambient light sensing module 1, the full-spectrum warm light lighting module 2, the active heat pump heat and directional heat dissipation module 4, and the display chamber temperature control module 5.

[0039] See Figure 3 As shown in the schematic diagram of the feedforward and feedback dual-loop control principle provided in Embodiment 1 of this application, its control architecture is divided into two loops: The first loop is a feedforward loop, responsible for zero-latency thermal prediction and preset tasks. When the intelligent collaborative control module 6 detects a change in the color temperature and illuminance of the external ambient light through the ambient light sensing module 1 (e.g., a multi-channel spectral sensor), the intelligent collaborative control module 6 first determines the target atmosphere scene to be entered based on the built-in scene mapping algorithm, and then determines the target lighting color temperature value required to be output by the full-spectrum warm light illumination module 2. T c and brightness value L Subsequently, the intelligent collaborative control module 6 calls a "color temperature-brightness-infrared heat generation power" lookup table (LUT) that has been experimentally calibrated and stored in memory, directly retrieving the full-spectrum warm light illumination module 2's value. T c and L Expected infrared heat generation power under operating conditions P IR_est .

[0040] The LUT (Local Temperature Detector) setup process is as follows: In a constant temperature environment, the color temperature (in 100K increments, covering the 2200K-4000K range) and luminance (in 5% increments, covering the 10%-100% range) of the full-spectrum warm light illumination module 2 are set one by one. After each operating point reaches thermal steady state, the portion of the total heat generation power of the full-spectrum warm light illumination module 2 attributable to near-infrared radiation is measured using a calorimeter or power analyzer, and this power value is recorded and written into the LUT. For example, when the target color temperature is set to 2700K and the luminance is set to 40%, the estimated infrared heat generation power recorded in the LUT is 18W.

[0041] Next, the intelligent collaborative control module 6 calculates the preset heat pumping power required by the semiconductor cooling chip in advance according to formula (1). P TEC_ff : (1) in, α The heat capture efficiency coefficient is 0. <α≤ 1. In this example, the value is 0.9; β The rate of change feedforward coefficient is specifically used to compensate for the transient temperature difference caused by the heat capacity of the air inside the display case 7, and can be determined by identifying the thermodynamic parameters of the system. To estimate the time-varying rate of infrared heat generation power.

[0042] The second loop is the feedback loop, responsible only for residual fine-tuning. After the intelligent collaborative control module 6 synchronously sends adjustment commands to the full-spectrum warm light illumination module 2 and the active heat pump heat and directional heat dissipation module 4, the intelligent collaborative control module 6 then obtains the actual temperature of the exhibit area through the temperature sensor in the display compartment 7. T real Calculate its relationship with the target temperature T target deviation e ( t The feedback correction amount Δ is calculated using a PID algorithm. P TEC_fb This is to compensate for modeling errors and external disturbances.

[0043] Finally, the intelligent collaborative control module 6 adjusts the operating power of the thermoelectric cooler to... P TEC_final = P TEC_ff +Δ P TEC_fb In the actual test conditions of this embodiment (target color temperature switched from 5000K to 2700K, brightness 40%), the feedforward loop handled approximately 92% of the heat cancellation, and the feedback loop processed approximately 8% of the residual. At the instant the lighting atmosphere changed, the heat dissipation power was simultaneously activated, and the surface temperature fluctuation of the exhibit remained within ±0.15℃.

[0044] In addition, to overcome the engineering bottlenecks that this solution may encounter in actual commercial applications, the intelligent collaborative control module 6 incorporates several safeguard logics: For example, to address transient changes in the ambient light sensing module 1 signal caused by pedestrian obstruction or flashlights in a shopping mall, the intelligent collaborative control module 6 incorporates a moving average filtering algorithm to smooth data from multiple consecutive sampling periods. When the detected rate of change in illuminance exceeds a preset threshold, the intelligent collaborative control module 6 determines the change as transient interference and does not trigger a scene switching command, preventing the semiconductor cooling chip from frequently starting and stopping due to induced current surges. In another embodiment, a hysteresis interval control algorithm can also be used, setting upper and lower threshold switching values ​​for illuminance and color temperature respectively. A hysteresis interval is formed between the two thresholds, and switching is triggered only when the detected value continuously exceeds the corresponding threshold and remains at a preset duration.

[0045] For example, to address the potential condensation issue at the cold end of the active heat pump heat and directional heat dissipation module 4 in high humidity environments, the intelligent collaborative control module 6 incorporates anti-condensation control logic. Specifically, the intelligent collaborative control module 6 acquires real-time temperature and humidity data from inside and outside the display case (this data can be provided by an additional sensor in the ambient light sensing module 1 or an independent sensor), calculates the real-time dew point temperature, and dynamically sets a limit command to consistently keep the minimum operating temperature of the cold end of the semiconductor cooling chip within a preset safe range of 1°C to 2°C above the real-time dew point temperature, thus avoiding the risk of short circuits or obstructed vision caused by condensation at the cold end.

[0046] In this embodiment, the transparent spectral frequency division heat capture module 3 performs spectral-level heat interception in the optical path, and then actively and directionally forces heat dissipation from the edge of the transparent thermally conductive substrate 31 by the active thermoelectric pump heat and directional heat dissipation module 4. Finally, under the feedforward and feedback dual-loop synchronous linkage control of the intelligent collaborative control module 6, the decoupling of "visual warmth" and "physical heat" is achieved.

[0047] Example 2 This embodiment provides a method for using an ambient lighting display case with adjustable temperature according to ambient light. This method is applied to the display case described in Embodiment 1. See also... Figure 4 As shown in the schematic diagram of the usage method provided in Embodiment 2 of this application, the method specifically includes the following steps: Step S401: Obtain the color temperature and illuminance of the ambient light outside the display case.

[0048] Specifically, this step can be completed by the ambient light sensing module 1 (such as a multi-channel spectral sensor) continuously collecting data and sending it to the intelligent collaborative control module 6.

[0049] Step S402: Determine a target illumination color temperature value based at least on the aforementioned color temperature and illuminance.

[0050] Specifically, the intelligent collaborative control module 6 determines the target atmosphere scene that the display cabinet should enter based on the received external light environment parameters and its built-in scene mapping algorithm, and determines the target lighting color temperature and brightness values ​​to be output by the full-spectrum warm light lighting module 2 accordingly.

[0051] Step S403: Based on the aforementioned target illumination color temperature value and a preset mapping relationship, determine the infrared heat generation power expected to be generated by the full-spectrum warm light illumination module 2 under the target illumination color temperature value.

[0052] Specifically, the preset mapping relationship is a "color temperature-brightness-infrared heat generation power" lookup table (LUT) established in advance through experimental calibration of the full-spectrum warm light illumination module 2. The intelligent collaborative control module 6 calls this LUT, using the color temperature and brightness determined in step S402 as input, and looks up the corresponding estimated infrared heat generation power value.

[0053] Step S404: Simultaneously, a first command is sent to the full-spectrum warm light illumination module 2 to adjust it to the target illumination color temperature value, and a second command is sent to the active thermoelectric pump and directional heat dissipation module 4 to preset it to a target heat pump power that matches the aforementioned infrared heat generation power.

[0054] Specifically, to achieve "zero-delay" thermal compensation, the intelligent collaborative control module 6 detects temperature fluctuations in the unequal chamber temperature sensor and simultaneously sends the "dimming" and "heat setting" commands. The calculation of the target pump heat power adopts the formula (1) with a differential term as described in Example 1.

[0055] Step S405: Obtain an actual temperature inside the display chamber 7, calculate a deviation value between the actual temperature and a target temperature, and perform feedback fine-tuning of the heat pumping power of the active thermoelectric pump and directional heat dissipation module 4 based on the deviation value.

[0056] Specifically, the intelligent collaborative control module 6 uses a PID algorithm to compensate for temperature deviations in order to correct the estimation errors of the feedforward model and external environmental disturbances.

[0057] Example 3 This embodiment uses a specific application scenario, combined with... Figures 1 to 5 This fully demonstrates the dynamic working process of the technical solution of this invention throughout a day.

[0058] In this embodiment, the display case is placed in a street-facing store of a high-end chocolate brand. The external ambient light changes naturally over time. The display compartment 7 contains fine chocolates for sale, and its ideal storage temperature is 16℃±0.5℃. The target temperature of the display compartment 7 is set at 16℃.

[0059] 10:00 AM – Opening hours, high color temperature mode At this time, the ambient light is natural morning light, with a color temperature of approximately 5500K and an illuminance of approximately 800 lux. The ambient light sensing module 1 continuously detects the external light and sends the color temperature and illuminance data to the intelligent collaborative control module 6. Based on its built-in scene mapping algorithm, the intelligent collaborative control module 6 determines that the current scene should be a "fresh and bright" atmosphere and sets the target lighting color temperature accordingly. T c =4500K, brightness L=80%. Subsequently, the intelligent collaborative control module 6 calls the LUT to find the estimated infrared heat generation power of the full-spectrum warm light illumination module 2 under this operating condition. P IR_est =8W, and calculate the preset pump heat power according to formula (1). P TEC_ff The intelligent collaborative control module 6 synchronously sends a first command (color temperature 4500K, brightness 80%) to the full-spectrum warm light illumination module 2, a second command (preset heat pump power) to the active thermoelectric pump and directional heat dissipation module 4, and a target temperature of 16℃ to the display chamber temperature control module 5. The light emitted by the full-spectrum warm light illumination module 2 passes through the micro-air gap 34 and enters the transparent spectral frequency division heat capture module 3. The spectral frequency division film layer 32 efficiently transmits the visible light component and illuminates the exhibit, while reflecting the near-infrared component back into the transparent thermal conductive substrate 31. The infrared heat in the central area of ​​the transparent thermal conductive substrate 31 is rapidly conducted laterally to the edge through the heat distribution layer 33, and the cold end of the semiconductor cooling chip forces the heat to the outside of the cabinet 8 through the indium foil. The display chamber temperature control module 5 is responsible for maintaining a steady-state base temperature of 16℃. The temperature sensor inside the display chamber 7 monitors the temperature of the exhibit area in real time and feeds it back to the intelligent collaborative control module 6 for PID fine-tuning, ensuring that the surface temperature of the exhibit remains stable at 16℃ ± 0.1℃.

[0060] Switch to warm color atmosphere mode from 6:00 PM to evening. At this time, the ambient light is warm evening light, with the color temperature dropping to approximately 3200K and the illuminance dropping to approximately 300 lux. The ambient light sensing module 1 sends this change to the intelligent collaborative control module 6 in real time. The intelligent collaborative control module 6 determines that it should switch to the "warm evening light" atmosphere scene and determines the target lighting color temperature. T c =2700K, brightness L =40%. The estimated infrared heat generation power under this operating condition was obtained using LUT. P IR_est=18W. When the temperature fluctuates within the display chamber 7 due to temperature changes, the intelligent collaborative control module 6 simultaneously sends a command to the full-spectrum warm light lighting module 2 to switch to 2700K / 40%, and sends a command to the active thermoelectric pump and directional heat dissipation module 4 to synchronously adjust the pumping power to a preset value matching 18W. At the instant of color temperature switching, the heat dissipation power is simultaneously adjusted, ensuring that no excess near-infrared heat radiation penetrates the transparent spectral frequency division heat capture module 3 and reaches the exhibit. Data from the temperature sensor shows that during the entire lighting atmosphere switching process, the maximum fluctuation in the exhibit's surface temperature was only 0.12℃.

[0061] This embodiment demonstrates the dynamic process from environmental perception, scene judgment, feedforward prediction, synchronous execution to feedback fine-tuning. This embodiment enables the system to achieve zero-delay thermal compensation capability when switching between different lighting modes.

[0062] Example 4 In a specific application scenario, set the following comparison ratio.

[0063]

[0064] The specific experimental procedure of Comparative Example 1: The same display cabinet as in the embodiment of this invention was used, but the full-spectrum warm light illumination module 2 was replaced with a 5000K cool color temperature LED, the coating of the transparent spectral frequency division heat capture module 3 was removed so that it only served as a regular transparent partition, the active heat pump heat and directional heat dissipation module 4 was removed and replaced with ordinary air cooling, and the control logic of the intelligent collaborative control module 6 was changed to pure feedback PID control, while keeping all other conditions the same. The target temperature of the display chamber was set at 16℃ in the experiment.

[0065] In its initial state, Comparative Example 1 used a 5000K cold light source, maintaining the temperature inside the display chamber at 16℃±1.5℃. Under this lighting, the exhibits exhibited a cool color tone, resulting in poor visual effects. After forcibly switching the light source to a 2700K warm LED, without spectral frequency division and active heat dissipation, visible light and near-infrared radiation penetrated the ordinary transparent partition and directly shone on the exhibits. Actual measurement data showed that the surface temperature of the exhibits increased by 1.5℃ within 1 minute and by 2.8℃ within 3 minutes, continuing to climb and exceeding the 2℃ temperature rise safety threshold for chocolate exhibits. This resulted in a decrease in the surface gloss of the exhibits, indicating a quality change.

[0066] Comparison conclusion: The comparative experiment in Comparative Example 1 shows that without the three key features of the transparent spectral frequency division heat capture module 3, the active thermoelectric pump heat and directional heat dissipation module 4, and the feedforward control logic of the intelligent collaborative control module 6, it is impossible to achieve compatibility between warm ambient light and precise temperature control.

[0067] Example 5 In a specific application scenario, such as in a commercial application, the display case is operating normally in 2700K warm light mode. Suddenly, a strong external flash (such as when a customer takes a photo) shines on the ambient light sensing module 1, causing the illuminance value detected by it to jump from 300 lux to 1500 lux in 0.1 seconds, and the color temperature also changes drastically.

[0068] In this situation, a traditional feedback control system would immediately respond to this false change in ambient light, switching the lighting color temperature to an incompatible high color temperature mode, while drastically adjusting the heat dissipation power and target temperature setpoint, causing system oscillations and exhibit temperature fluctuations.

[0069] In this embodiment of the invention, the moving average filtering algorithm built into the intelligent collaborative control module 6 smooths the data from 10 consecutive sampling periods, effectively filtering out the transient spike signal. The intelligent collaborative control module 6 determines that the illuminance change is a transient disturbance rather than a change in actual ambient light, and does not trigger a scene switching command. The full-spectrum warm light illumination module 2, the active thermoelectric pump heat and directional heat dissipation module 4, and the display chamber temperature control module 5 all maintain their original operating states, and the exhibit temperature is unaffected. Throughout the process, the intelligent collaborative control module 6 also records the timestamp and signal characteristics of the abnormal event, providing data accumulation for subsequent algorithm optimization.

[0070] By employing this embodiment, the present invention gains anti-interference capabilities in complex business environments.

[0071] In another abnormal scenario, when the display case is in a high-humidity environment in summer (relative humidity above 85%), the anti-condensation control logic of the intelligent collaborative control module 6 obtains data from real-time temperature and humidity sensors to calculate the real-time dew point temperature. When the operating temperature of the cold end of the thermoelectric cooler approaches the dew point temperature, it actively limits the power of the cold end, ensuring that its operating temperature is always about 1.5°C higher than the dew point temperature, reducing the risk of condensation at the cold end. When entering a dry winter environment (relative humidity below 30%), the dew point temperature is much lower than the normal operating temperature of the cold end, so the power limitation is not triggered, ensuring heat dissipation efficiency.

[0072] The above is a description of some embodiments of this application. Based on the above scheme, various reasonable modifications and extensions can be made.

[0073] In other implementations, this solution can be applied to multi-temperature zone display cases. Multiple independent temperature-controlled sub-zones can be set up within a single display compartment 7. Each sub-zone corresponds to a set of modules including a full-spectrum warm light illumination module 2, a transparent spectral frequency division heat capture module 3, and an active heat pump heat and directional heat dissipation module 4. The intelligent collaborative control module 6 performs differentiated linkage control based on the independent objectives and required atmosphere of each zone, so as to better display different temperature-sensitive exhibits simultaneously.

[0074] In some other implementations, to optimize overall energy efficiency, the display compartment temperature control module 5 handles the steady-state basic heat load, while the active heat pump heat and directional heat dissipation module 4 is coordinated and intervened by the intelligent collaborative control module 6 when the lighting mode changes or dynamic compensation is required. This collaborative division of labor improves the overall energy efficiency ratio of the system while ensuring temperature control accuracy.

[0075] It should be understood that the terms "one embodiment," "an embodiment," "a feasible implementation," or "some implementations" used throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "one embodiment," "an embodiment," "a feasible implementation," or "some implementations" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to the embodiments of the present invention.

[0076] The above description is merely a specific embodiment of the present invention, but the protection scope of the embodiments of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention. Therefore, the protection scope of the embodiments of the present invention should be determined by the protection scope of the claims.

Claims

1. An ambient lighting display cabinet with adjustable temperature according to ambient light, characterized in that, include: An ambient light sensing module is used to detect the color temperature and illuminance of the ambient light outside the display case; A full-spectrum warm light illumination module is directly installed above the interior of a display compartment of the display case, configured to emit a warm light with adjustable color temperature toward the exhibits, the warm light containing visible light and near-infrared components; A transparent spectral frequency division heat capture module is disposed in the optical path between the full-spectrum warm light illumination module and the exhibit; the transparent spectral frequency division heat capture module includes a transparent thermally conductive substrate and a spectral frequency division film layer, wherein the spectral frequency division film layer has a higher transmittance for the visible light band than its transmittance for the near-infrared band, so as to reflect and intercept the near-infrared component in the warm light within the transparent thermally conductive substrate. An active thermoelectric pump heat and directional heat dissipation module includes at least one thermoelectric cooler, the cold end of the thermoelectric cooler is thermally coupled to at least one edge region of the transparent thermally conductive substrate, and the hot end of the thermoelectric cooler is connected to the outside of the display case through a heat dissipation channel. A display chamber temperature control module is used to maintain a basic set temperature inside the display chamber; An intelligent collaborative control module is connected to the ambient light sensing module, the full-spectrum warm light lighting module, the active heat pump heat and directional heat dissipation module, and the display chamber temperature control module via signal connection. The intelligent collaborative control module is configured to synchronously adjust the color temperature output of the full-spectrum warm light illumination module and the heat pumping power of the active thermoelectric pump and directional heat dissipation module in response to the color temperature and illuminance detected by the ambient light sensing module.

2. The ambient lighting display cabinet according to claim 1, characterized in that, The transparent thermally conductive substrate is made of sapphire glass or alumina ceramic glass, with a visible light transmittance of not less than 92% and a thermal conductivity of not less than 25 W / (m·K).

3. The ambient lighting display cabinet according to claim 1 or 2, characterized in that, The spectral frequency division film is deposited on the lower surface of the transparent thermally conductive substrate. The spectral frequency division film has a transmittance of not less than 95% for light in the 400nm to 700nm wavelength band and a reflectance of not less than 90% for light with a wavelength above 700nm.

4. The ambient lighting display cabinet according to claim 1, characterized in that, The transparent thermally conductive substrate has a transparent heat distribution layer disposed inside or on one of its upper surfaces. The transparent heat distribution layer includes a graphene film or an indium tin oxide transparent conductive film, which is used to conduct heat from the central region of the transparent thermally conductive substrate laterally to the edge region.

5. The ambient lighting display cabinet according to claim 1, characterized in that, The cold end of the semiconductor cooling chip is thermally coupled to the edge region of the transparent thermally conductive substrate through an indium foil or a thermally conductive silicone grease layer.

6. The ambient lighting display cabinet according to claim 1, characterized in that, A micro-air gap with a width of 0.5 mm to 2 mm is formed between a lower surface of the full-spectrum warm light illumination module and an upper surface of the transparent spectral frequency division heat capture module.

7. The ambient lighting display cabinet according to claim 1, characterized in that, The intelligent collaborative control module has a built-in anti-condensation control logic, which is configured to: acquire real-time temperature and humidity data inside and outside the display cabinet, calculate a real-time dew point temperature, and dynamically limit the cold end working temperature of the semiconductor cooling chip to maintain it within a preset range higher than the real-time dew point temperature.

8. A method of using an ambient lighting display case with adjustable temperature according to ambient light, applied to the display case as described in any one of claims 1 to 7, characterized in that, The method of use includes: Obtain the color temperature and illuminance of the ambient light outside the display case; A target illumination color temperature value is determined based at least on the color temperature and the illuminance; Based on the target illumination color temperature value and a preset mapping relationship, determine the infrared heat generation power expected to be generated by the full-spectrum warm light illumination module under the target illumination color temperature value; Simultaneously, a first instruction is sent to the full-spectrum warm light illumination module to adjust it to the target illumination color temperature value, and a second instruction is sent to the active thermoelectric pump heat and directional heat dissipation module to preset it to a target heat pump power that matches the infrared heat generation power; The actual temperature inside the display chamber is obtained, the deviation between the actual temperature and a target temperature is calculated, and the pumping power of the active thermoelectric pump and directional heat dissipation module is finely adjusted based on the deviation.

9. The method of use according to claim 8, characterized in that, The preset mapping relationship is a pre-calibrated lookup table, which stores the estimated infrared heat generation power values ​​corresponding to the full-spectrum warm light illumination module under different color temperature and brightness combinations.

10. The method of use according to claim 8, characterized in that, The target pump thermal power P TEC_ff Calculate using the following formula: ； in, P IR_est The infrared heat generation power, α Let be a heat capture efficiency coefficient, and 0 < 1. α ≤1, β It is a rate-of-change feedforward coefficient. The time-varying rate of change of the infrared heat generation power is denoted as .

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