Blood card incubation temperature control system

Abstract

The embodiment of the invention provides a blood card incubation temperature control system. The system comprises a heating film, an incubation plate, a heat preservation box, a control panel, a first temperature sensor and a second temperature sensor, wherein the incubation plate and the heat preservation box form a cavity; the heating film is used for heating the incubation plate, so that the incubation plate heats air in the cavity through heat radiation; the first temperature sensor is used for detecting the cavity air temperature corresponding to the cavity; the second temperature sensor is used for detecting the temperature of incubation metal corresponding to the incubation plate; the control panel is used for controlling the heating power of the heating film based on the temperature difference between the cavity air temperature and the preset air temperature so as to adjust the incubation metal temperature, so that the incubation plate adjusts the cavity air temperature to the preset air temperature based on the thermal radiation. The system can improve the stability of incubation temperature control.

Description

Technical Field

[0001] This application relates to the field of computer technology, and in particular to a blood card incubation temperature control system. Background Technology

[0002] Blood cards are mainly based on the principle of antigen-antibody reaction. Taking microcolumn gel cards as an example, known antibodies, such as anti-A, anti-B, and anti-D monoclonal antibodies, are added to the microcolumn gel tube of the microcolumn gel card. Then, the blood to be tested is added to the microcolumn gel tube, and the blood can be detected based on the reaction results.

[0003] Antigen-antibody reactions are highly specific, and their efficiency and specificity are significantly affected by temperature. By controlling the incubation temperature, conditions similar to human body temperature can be simulated, which is close to the internal environment and is conducive to antigen-antibody binding, thereby improving the sensitivity and accuracy of the reaction.

[0004] Currently, incubator temperature control relies on real-time monitoring of the chamber temperature. Heating occurs when the temperature falls below the set temperature, and heating stops when the temperature reaches or exceeds the set temperature. This simplistic temperature control logic leads to issues like temperature overshoot during heating, resulting in poor stability of the incubation temperature control. Summary of the Invention

[0005] The main objective of this application is to propose a blood card incubation temperature control system to improve the stability of incubation temperature control.

[0006] To achieve the above objectives, this application proposes a blood card incubation temperature control system, comprising: a heating film, an incubation plate, a heat preservation box, a control board, a first temperature sensor, and a second temperature sensor, wherein the incubation plate and the heat preservation box constitute a cavity; The heating film is used to heat the incubation plate, so that the incubation plate heats the air inside the cavity through thermal radiation; The first temperature sensor is used to detect the cavity air temperature corresponding to the cavity. The second temperature sensor is used to detect the temperature of the incubation metal corresponding to the incubation plate; The control board is used to control the heating power of the heating film based on the temperature difference between the cavity air temperature and the preset air temperature, so as to adjust the temperature of the incubated metal, and the incubation board adjusts the cavity air temperature to the preset air temperature based on thermal radiation.

[0007] Optionally, in one embodiment, when the temperature difference between the cavity air temperature and the preset air temperature is greater than a preset threshold, the control board controls the heating power of the heating film to adjust the incubation metal temperature so that the incubation metal temperature reaches the preset metal temperature. When the temperature difference between the cavity air temperature and the preset air temperature is less than the preset threshold, the control board calls the closed-loop feedback control algorithm to control the heating power of the heating film based on the temperature difference between the cavity air temperature and the preset air temperature, until the cavity air temperature reaches the preset air temperature.

[0008] Optionally, in one embodiment, the system further includes an ambient temperature compensation module, which collects the ambient temperature in real time, and the control board is also used to adjust the parameters of the closed-loop feedback control algorithm according to the temperature difference between the ambient temperature and the preset ambient reference value.

[0009] Optionally, in one embodiment, the control board is further configured to invoke a closed-loop feedback control algorithm when an abnormal situation is detected, and control the heating power of the heating film based on the temperature difference feedback between the cavity air temperature and the preset air temperature until the cavity air temperature reaches the preset air temperature. The abnormal situation includes at least one of abnormal detection of the incubation metal temperature or abnormal setting of the preset metal temperature.

[0010] Optionally, in one embodiment, the incubation plate includes an upper incubation plate and a lower incubation plate, with heating films attached to the upper and lower incubation plates respectively, and a second temperature sensor disposed on the upper incubation plate or the lower incubation plate.

[0011] Optionally, in one embodiment, shallow groove structures are provided on the opposite surfaces of the upper and lower incubation plates, and the shallow groove structures are used to position the heating film.

[0012] Alternatively, in one embodiment, the upper incubation plate, the heating film, and the lower incubation plate are detachably connected.

[0013] Optionally, in one embodiment, the interior of the insulated box is filled with expanding foam; or, the interior of the insulated box is filled with expanding foam, and the expanding foam is surrounded by an aluminum foil reflective layer.

[0014] Alternatively, in one embodiment, the cavity formed by the insulated box and the incubation plate is open on one side.

[0015] Optionally, in one embodiment, a repositionable windshield ring is provided on the open side of the cavity.

[0016] As can be seen from the above technical solutions, the embodiments of this application have the following advantages: This method controls the heating power of the heating film by adjusting the temperature difference between the cavity consisting of the incubation plate and the insulation box, which is detected by a first temperature sensor, and the preset air temperature. This allows the incubation plate to adjust the cavity air temperature to the preset air temperature based on thermal radiation. As a metal with a large heat capacity, the incubation plate can even out the local heat of the heating film and smooth out the output fluctuations of the heating film based on its thermal conductivity. This timely adjustment of the incubation metal temperature can improve the stability of the incubation temperature control. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the blood card incubation temperature control system provided in the embodiments of this application; Figure 2 This is a schematic flowchart of the PID control provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of an incubator provided in an embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of an incubator provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0019] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0020] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0021] In the embodiments of this application, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0022] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0024] Blood cards, also known as microcolumn gel cards, are primarily based on the principle of antigen-antibody reactions and are used for the detection of surface antigens on red blood cells. Antigen-antibody reactions are highly specific, and their efficiency and specificity are significantly affected by temperature. Controlling the incubation temperature can simulate the body's temperature conditions, closely approximating the internal environment, which is beneficial for antigen-antibody binding and improves the sensitivity and accuracy of the reaction. Currently, incubators use heat sinks for heating, with cooling fins dissipating heat to heat the air inside the incubator. However, this heating method suffers from significant heat loss, high power consumption, long temperature conduction paths, and large temperature fluctuations during temperature control. Furthermore, the current temperature control process in incubators involves real-time monitoring of the chamber temperature; if the temperature falls below the set temperature, the heat sink is activated to heat; if the temperature reaches or exceeds the set temperature, heating is stopped. When heating stops, the heat sink temperature has already far exceeded the chamber temperature, and even after heating stops, the chamber temperature continues to rise and then slowly decreases, resulting in an excessively long temperature stabilization time.

[0025] Based on this, embodiments of this application provide a blood card incubation temperature control system, which can solve the above problems.

[0026] Please see Figure 1 ,like Figure 1 The diagram shown is a structural schematic of a blood card incubation temperature control system provided in an embodiment of this application. The system includes: a heating film 1, an incubation plate 2, a heat preservation box 3, a control board 4, a first temperature sensor 5, and a second temperature sensor 6. The incubation plate 2 and the heat preservation box 3 form a cavity. The heating film 1 is used to heat the incubation plate 2, so that the incubation plate 2 heats the air inside the cavity through thermal radiation; The first temperature sensor 5 is used to detect the cavity air temperature corresponding to the cavity. The second temperature sensor 6 is used to detect the temperature of the incubation metal corresponding to the incubation plate 2; The control board 4 is used to control the heating power of the heating film 1 based on the temperature difference between the cavity air temperature and the preset air temperature, so as to adjust the temperature of the incubated metal, and so that the incubation board 2 adjusts the cavity air temperature to the preset air temperature based on thermal radiation.

[0027] Specifically, the heating film 1, as the heat provider of the system, can be a flexible electric heating sheet that is closely attached to the surface of the incubation plate 2. The resistance wire inside it heats up evenly after being energized, converting electrical energy into heat energy, and quickly transferring the heat to the incubation plate 2 through surface contact. It is thin and has a small heat capacity, so the response is extremely fast with almost no lag.

[0028] The incubation plate 2 can be a metal plate, and the incubation box 3 encloses the incubation plate 2, together forming a cavity. The incubation box 3 can keep the heat of the incubation plate 2 warm, reducing energy loss, while the incubation plate 2 can continuously release heat to the air inside the cavity. The incubation plate 2 can be milled with grooves that match the size of the blood card, and it can be anodized metal plate. The anodized film has low surface energy and a porous honeycomb structure, which can seal the pores to reduce surface roughness, thereby reducing the amount of blood protein adsorbed on the surface of the metal plate and making it easier to clean.

[0029] The first temperature sensor 5 can be a temperature sensor that is far away from the surface of the incubation plate 2, and senses the temperature of the air in the cavity, that is, senses the actual environment in which the blood card is located.

[0030] The second temperature sensor 6 can be a temperature sensor solidified on the surface of the incubation plate 2, which can sense the temperature of the incubation metal on the incubation plate 2, that is, sense the intensity of the heat source.

[0031] The control board 4 reads the temperature values ​​collected by the first temperature sensor 5 and the second temperature sensor 6, compares the measured values ​​with the preset values ​​to calculate the control quantity, and then adjusts the average power of the heating film 1 through the control quantity, ultimately keeping the air temperature inside the cavity stable at the set value. Specifically, the difference between the cavity air temperature provided by the first temperature sensor 5 and the preset air temperature reflects the degree to which the current cavity air temperature deviates from the target temperature. The larger the difference, the higher the system's heat flux requirement. The larger the difference between the incubation metal temperature provided by the second temperature sensor 6 and the preset metal temperature, the larger the heat flux margin that the system can release. The control board 4 determines the basic power command based on the air temperature difference, and simultaneously adjusts the heating power of the command based on the incubation metal temperature, so that the instantaneous power of the heating film 1 is always within the range that can meet the air heating requirement without causing the metal temperature to exceed the limit. This ensures that the cavity air temperature has a relatively fast heating rate at the beginning of the heating process, and can reduce the heating power in advance when it is close to the preset air temperature to slow down the heating rate and prevent temperature overshoot. The incubation plate 2 rapidly diffuses heat from the metal side across the entire plate surface and continuously transfers it to the air inside the cavity. The control plate 4 can adjust the heating power of the heating film 1 by using the difference between the cavity air temperature and the preset air temperature to regulate the incubation metal temperature, and continue to adjust based on the new air temperature difference obtained in the next control cycle, repeating the cycle until the air temperature difference approaches zero and the metal temperature difference remains within a safe window.

[0032] As a metal body with high heat capacity, the incubation plate can uniformly distribute the local heat of the heating film. Based on its excellent thermal conductivity, it can smooth the output fluctuations of the heating film and adjust the temperature of the incubation metal in a timely manner, thereby improving the stability of the incubation temperature control.

[0033] In one embodiment, when the temperature difference between the cavity air temperature and the preset air temperature is greater than a preset threshold, the control board 4 controls the heating power of the heating film to adjust the incubation metal temperature so that the incubation metal temperature reaches the preset metal temperature. When the temperature difference between the cavity air temperature and the preset air temperature is less than the preset threshold, the control board 4 calls the closed-loop feedback control algorithm to control the heating power of the heating film based on the temperature difference between the cavity air temperature and the preset air temperature, until the cavity air temperature reaches the preset air temperature.

[0034] In this embodiment, the control board 4 first uses whether the difference between the cavity air temperature and the preset air temperature exceeds a preset threshold as the working mode switching condition. When the difference is greater than the threshold, the system is in the heating stage. At this time, the control board directly controls the heating film 1 to heat up rapidly, and the metal temperature of the incubation plate 2 rises accordingly until it reaches the preset metal temperature, thereby providing a sufficient heat source for the air and allowing the cavity air temperature to rise rapidly.

[0035] When the air temperature difference shrinks below the preset threshold, the system can enter the fine control stage. Control board 4 calls the closed-loop feedback control algorithm to continuously compare the real-time air temperature with the preset air temperature, and outputs a corresponding power adjustment signal to the heating film 1. By fine-tuning the average heating power of the heating film 1, heat is transferred from the metal to the air at a suitable rate, and the cavity air temperature can be slowly increased to avoid overshoot, ultimately stabilizing the cavity air temperature at the preset air temperature. The closed-loop feedback control algorithm is a continuously self-correcting control method. Its working process involves first detecting the temperature of the controlled object, comparing this value with the desired target temperature to obtain the error, and then calculating the control quantity to be applied based on the magnitude and trend of the error. This control quantity is then applied to the controlled object through the actuator. Subsequently, the temperature of the controlled object is detected again, forming a new error, and the above process is repeated, causing the temperature of the controlled object to continuously approach the target value. Thus, even under external disturbances or changes in object characteristics, the system can still maintain stable and accurate operation. For example, this closed-loop feedback control algorithm can be a proportional-integral-derivative (PID) algorithm.

[0036] When the difference is large, the heating film is driven at full power to quickly raise the metal temperature to the set point and shorten the waiting time after startup. When the difference enters a small range, the closed-loop feedback control algorithm corrects the heating power of the heating film in real time to prevent the cavity air temperature from overheating and finally stabilizes the air temperature to the preset value, thereby improving the stability of the incubation temperature control.

[0037] In one example, the incubation plate acts as an emitter of heat radiation, and its thermal conductivity directly determines the efficiency and uniformity of heat transfer. When using metals with high thermal conductivity, such as copper and aluminum, heat can be quickly and evenly distributed on the surface of the incubation plate, transferring heat faster, reducing heat loss, and improving overall heat transfer efficiency. Therefore, a lower heating power, such as 100W, is suitable, achieving a faster heating rate and more stable temperature maintenance, saving energy. However, when using metals with low thermal conductivity, such as stainless steel and cast iron, the heat transfer speed is slow. Therefore, the maximum power can be limited to a higher heating power, such as 200W, to increase the heating rate inside the incubator. After reducing the heating power, temperature overshoot is not significant under low thermal conductivity.

[0038] In one example, the embodiment of this application can also use thermal conductivity as a correction factor for power adjustment, and combine it with the real-time temperature difference to calculate the optimal heating power. Specifically, the control board can pre-store the correction factors corresponding to the thermal conductivity of different metal materials. When the system is running, the metal material of the incubation plate is first confirmed (or the thermal conductivity parameters of the selected material are pre-entered), and then the real-time temperature difference between the cavity air temperature detected by the first temperature sensor and the preset temperature is combined with the algorithm to calculate the current required heating power.

[0039] Alternatively, the proportional, integral, and derivative weights of the closed-loop feedback control algorithm can be adjusted in advance based on the metal material of the incubation board, so that the algorithm gain matches the actual thermal diffusion capacity of the metal material.

[0040] In one embodiment, the system further includes an ambient temperature compensation module, which collects the ambient temperature in real time. The control board 4 is also used to adjust the parameters of the closed-loop feedback control algorithm according to the temperature difference between the ambient temperature and the preset ambient reference value.

[0041] In this embodiment, the control board 4, based on the original temperature difference control, can also introduce the deviation between the external ambient temperature and the preset environmental reference value. That is, when the external temperature is lower than the reference, the system's heat dissipation accelerates. At this time, the control board 4 can increase the proportion and integral weight of the closed-loop feedback control algorithm according to the deviation magnitude, increase the average power of the heating film 1 in advance, and suppress the cooling trend caused by additional heat dissipation. When the external temperature is higher than the reference, heat dissipation decreases, and the control board 4 reduces the corresponding weight and tightens the proportion and integral weight of the closed-loop feedback control algorithm to prevent overshoot. By compensating for the impact of ambient temperature changes on the cavity's heat dissipation conditions in real time, the algorithm gain is always matched with the external heat load, so that the cavity air temperature remains at the same set value under conditions such as seasonal changes, air conditioning start-up and shutdown, or parallel heat dissipation of equipment, further reducing the overall steady-state error and fluctuation range.

[0042] In one implementation, Figure 1Based on this, the incubation plate 2 includes an upper incubation plate and a lower incubation plate, with heating film 1 attached to the upper and lower incubation plates respectively, and a second temperature sensor 6 disposed on the upper incubation plate or the lower incubation plate.

[0043] In this embodiment, the incubation plate 2 can adopt a structure in which the heating film 1 is sandwiched between the upper and lower incubation plates: the heating film 1 is tightly sandwiched in the middle, and both sides are in contact with the metal at the same time. The heat does not need to be conducted to one side first and then diffused, but directly enters the plate from the upper and lower directions, so that the heat flow is evenly distributed in the thickness direction. This can increase the overall heating rate of the metal plate, reduce the transverse temperature difference, and improve the surface temperature uniformity.

[0044] In one embodiment, shallow groove structures are provided on the opposite surfaces of the upper and lower incubation plates, and the shallow groove structures are used to position the heating film 1.

[0045] In this embodiment, shallow grooves related to the thickness of the heating film 1 are milled on the opposite surfaces of the upper and lower incubation plates. After being assembled, they form a closed cavity with the same height as the thickness of the heating film 1. This allows the heating film 1 to be embedded in the cavity and then limited by the surrounding steps, ensuring that the surface of the heating film 1 always maintains full-area surface contact with the metal, eliminating local thermal resistance caused by gaps, and maintaining uniform heat flow and consistent temperature distribution.

[0046] In one embodiment, the upper incubation plate, the heating film 1, and the lower incubation plate are detachably connected.

[0047] In this embodiment, the upper incubation plate, heating film 1, and lower incubation plate can be detachably connected. For example, a detachable sandwich structure can be formed by through holes and screws evenly distributed around the perimeter. The upper plate can be removed and the heating film 1 replaced in sequence by loosening the screws. Then, the positioning pin can be pressed to reset and lock. There is no need to disassemble the whole machine or damage the heat conduction interface. The film can be replaced in time during maintenance, reducing downtime.

[0048] In one embodiment, the interior of the heat preservation box 3 is filled with expanding foam, or the interior of the heat preservation box 3 is filled with expanding foam, and the expanding foam is surrounded by an aluminum foil reflective layer.

[0049] In this embodiment, the insulation material of the insulation box 3 can be expanded polyurethane foam, which is a two-component polyurethane material that expands and solidifies rapidly after mixing to form closed-cell foam. It has low thermal conductivity and light weight, which can block thermal bridges and reduce heat dissipation.

[0050] Inside the interlayer of the insulation box 3, an aluminum foil reflective layer can be continuously bonded to the periphery of the foam. The surface emissivity of the aluminum foil reflective layer is less than 0.05, which can reflect the long-wave heat radiated outward back into the cavity, reduce radiative heat loss, prevent the foam from absorbing moisture and aging, and block gas permeation, so that the insulation performance of the insulation box 3 remains stable for a long time.

[0051] In one embodiment, the cavity formed by the insulated box 3 and the incubation plate 2 is open on one side.

[0052] In this embodiment, the cavity formed by the insulated box 3 and the incubation plate 2 is always open on one side, and the area and position of the opening are fixed and do not change with the removal or placement of blood cards. Compared with the traditional closed incubation with a lid, the open incubator used in this embodiment eliminates the need for a robotic arm (or manual operation) to open the lid, thus improving work efficiency. At the same time, the air convection pattern inside the incubator remains constant throughout the entire experiment, and the heat loss rate of the cavity remains basically unchanged under windless conditions. The closed-loop feedback control algorithm can maintain the temperature by only compensating for a fixed heat dissipation power, without the need for significant adjustments due to frequent opening and closing of the incubator lid.

[0053] In one embodiment, a repositionable windshield ring is provided on the open side of the cavity.

[0054] In this embodiment, an elastic windproof ring can also be fixed to the open side edge of the cavity. Its inner diameter is slightly smaller than the shape of the blood card. When the blood card is inserted, the windproof ring is stretched open and close to the card. After being pulled out, it returns to its original position by its own elasticity, always blocking the gap between the opening and the card, reducing the air exchange area, keeping the convection and heat dissipation rate inside the cavity stable, and reducing the impact of ambient temperature fluctuations on the closed-loop feedback control algorithm.

[0055] In one example, the implementation logic of the closed-loop feedback control algorithm could be: Preset the preset air temperature T tar Preset metal temperature T htar T htar >T tar The proportional coefficient P, integral coefficient I, and derivative coefficient D of the closed-loop feedback control algorithm.

[0056] The cavity air temperature T0 and the incubation metal temperature T are read at regular intervals. h .

[0057] When the incubator is working, when T0 < (T tar -0.5), using T htar The target temperature T is calculated by PID control. h The temperature is calculated using PID control, and the incubation plate is kept at a constant temperature of T. htar The displayed temperature is T0. At this time, temperature T0 is less than T. tar The temperature of the incubation plate is higher than that of the cavity, radiating heat, causing the temperature inside the cavity to rise slowly.

[0058] When T tar ≥T0≥(T tar -0.5), using T tarT0 is the target temperature calculated by the PID controller. Through PID control, the incubator chamber is kept at a constant temperature of T0. tar .

[0059] Where E(n) = target temperature - measured temperature; / / current error SumE(n)=E(0)+E(1)+E(2)+…. E(n-1)+E(n); / / Cumulative error The maximum value of SumE(n) is 100; values ​​exceeding this are calculated as 100. Output value=P* E(n)+I* SumE(n)+D*( E(n)- E(n-1)).

[0060] In one embodiment, the control board is also used to control the heating power of the heating film based on the temperature difference feedback between the cavity air temperature and the preset air temperature, according to the closed-loop feedback control algorithm after adjusting the parameters, when an abnormal situation is detected, until the cavity air temperature reaches the preset air temperature. The abnormal situation includes at least one of abnormal detection of incubation metal temperature or abnormal setting of preset metal temperature.

[0061] In this embodiment, when the control board detects an abnormal situation, it can promptly cancel the temperature adjustment strategy based on the temperature of the incubating metal. The temperature difference feedback between the cavity air temperature and the preset air temperature is used as the only controlled variable. The closed-loop feedback control algorithm modulates the pulse width of the heating film based on the temperature difference feedback to form a negative feedback closed loop until the temperature difference feedback converges to zero.

[0062] The abnormal situations include at least one of the following: abnormal detection of the incubation metal temperature or abnormal setting of the preset metal temperature. Abnormal detection of the incubation metal temperature can be a situation where the system cannot obtain a reliable current value of the metal temperature, such as the absence of a second temperature sensor in the structure or a damaged second temperature sensor.

[0063] An abnormal preset metal temperature setting can occur when the target metal temperature setting exceeds the range allowed by the control board firmware or violates established logic criteria. For example, if the user has not set it, the system defaults to 0, or the user has set it incorrectly, resulting in the preset metal temperature being lower than the preset air temperature.

[0064] In one example, a flowchart of PID control can be found here. Figure 2 As shown: First, obtain the temperature of the incubation metal and the temperature of the cavity air. Determine if the incubation metal temperature detection is abnormal. If so, it indicates that a second temperature sensor is missing or damaged. In this case, a single-sensor control algorithm can be used, where the preset air temperature is used as the PID target temperature, and the cavity air temperature is used as the PID calculated temperature, causing the cavity air temperature to rise rapidly and then slowly approach the target temperature. If not, determine if the preset metal temperature setting is abnormal. An abnormal setting may be due to the user not setting a target temperature for the incubation board or the preset metal temperature being lower than the preset air temperature. To continue temperature control, a single-sensor control algorithm can be used, where the preset air temperature is used as the PID target temperature, and the cavity air temperature is used as the PID calculated temperature for PID control. If the setting is normal, determine if the difference between the cavity air temperature and the preset air temperature is greater than a preset threshold. If the difference is greater than the preset threshold, use the preset metal temperature as the PID target temperature and the incubation metal temperature as the PID calculated temperature to rapidly heat the incubation board. If the difference is less than a preset threshold, the preset air temperature is used as the target temperature for the PID controller, and the cavity air temperature is used as the calculated temperature for the PID controller. This cools the incubation plate while slowly warming the air inside the cavity, preventing temperature overshoot. It can be understood that the incubation metal temperature and the cavity air temperature are real-time acquired temperatures, and the PID controller continuously updates the control process based on the changing temperatures.

[0065] In one example, an incubator structure can be referenced. Figure 3 As shown, the incubator includes a decorative panel 8, an upper incubation plate 21, a heating film 1, a lower incubation plate 22, an incubation base 9, an insulation box 3, a pressure strip 10, a fixing seat 11, a control board 4, a control box 12, a front panel 13, a bracket 14, a first temperature sensor 5, a second temperature sensor 6, and a temperature control switch 7.

[0066] The mounting base 11 and the insulation box 3 are fixed together. The insulation box 3 is made of sheet metal welded together and filled with foaming agent. It has heat insulation function. The control board 4 is fixed to the bottom of the insulation box 3. The control box 12 protects the control board 4 and is also fixed to the bottom of the insulation box 3. The bracket 14 is fixed to the side of the insulation box 3 and is used to fix the front panel 13. The front panel 13 can be used as an appearance decoration. The incubation base 9 is fixed inside the insulation box 3. The first temperature sensor 5 is fixed on the incubation base 9. The incubation base 9 can be made of plastic. The first temperature sensor 5 is designed to avoid contact with other metals and is used to detect the air temperature in the compartment. The lower incubation plate 22 and the upper incubation plate 21 are respectively attached to the upper and lower surfaces of the heating film 1. Both are made of metal materials with good thermal conductivity. The second temperature sensor 6 is fixed on the lower incubation plate 22 and is in direct contact with it to detect the temperature of the lower incubation plate 22. The temperature control switch 7 is also fixed on the lower incubation plate 22 and controls the power supply based on the temperature of the lower incubation plate. That is, it can provide overheat and overcurrent protection. If the temperature or current exceeds the preset limit, it can disconnect the heating to prevent accidents such as fires. The upper incubation plate 21, the lower incubation plate 22, and the heating film 1 are fixed together on the incubation base 9. The decorative plate 8 is fixed to the upper incubation plate 21 and is held down by the pressure strip 10 to prevent it from warping. When the heating film 1 is powered on, it generates heat and conducts it to the upper incubator plate 21 and the lower incubator plate 22. The heat is then conducted to the incubator cavity through the upper incubator plate 21 and the lower incubator plate 22. The other five sides are kept warm by the heat preservation box 3. Only the side that is open to the top (the side where the blood card is placed) has a temperature loss. The open side retains some of the temperature through the decorative plate 8.

[0067] Accordingly, a cross-sectional schematic diagram of the incubator can be found by referring to Figure 4 As shown in the longitudinal cross-section, the incubator's layered structure is illustrated. The insulation box 3, filled with foaming agent, serves as both a heat insulation barrier and the overall frame of the unit, and is secured by the mounting base 11. An incubation base 9 is placed at the bottom of the inner cavity of the insulation box 3, utilizing its low thermal conductivity to thermally insulate the heating zone from the outer shell. From bottom to top, the lower incubation plate 22, the heating film 1, and the upper incubation plate 21 are stacked sequentially in the center of the base. These three metal plates are tightly bonded together with thermally conductive adhesive to form a homogenizing body, allowing for bidirectional heat transfer when the heating film is energized. The lower incubation plate 22 carries a temperature control switch 7, which controls the on / off state of the heating film 1. A control board 4 is installed at the bottom of the insulation box 3 and is enclosed by a control box 12.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] The preferred embodiments of the present application have been described above with reference to the accompanying drawings, but this does not limit the scope of the claims of the present application. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and substance of the embodiments of the present application shall be within the scope of the claims of the present application.

Claims

1. A blood card incubation temperature control system, characterized in that, It includes a heating film, an incubation plate, a heat preservation box, a control board, a first temperature sensor, and a second temperature sensor, wherein the incubation plate and the heat preservation box constitute a cavity; The heating film is used to heat the incubation plate, so that the incubation plate heats the air inside the cavity through thermal radiation; The first temperature sensor is used to detect the cavity air temperature corresponding to the cavity; The second temperature sensor is used to detect the temperature of the incubation metal corresponding to the incubation plate; The control board is used to control the heating power of the heating film based on the temperature difference between the cavity air temperature and the preset air temperature, so as to adjust the temperature of the incubation metal, and the incubation board adjusts the cavity air temperature to the preset air temperature based on thermal radiation.

2. The system according to claim 1, characterized in that, When the temperature difference between the cavity air temperature and the preset air temperature is greater than a preset threshold, the control board controls the heating power of the heating film to adjust the temperature of the incubated metal so that the temperature of the incubated metal reaches the preset metal temperature. When the temperature difference between the cavity air temperature and the preset air temperature is less than the preset threshold, the control board calls a closed-loop feedback control algorithm to control the heating power of the heating film based on the temperature difference between the cavity air temperature and the preset air temperature, until the cavity air temperature reaches the preset air temperature.

3. The system according to claim 2, characterized in that, The system also includes an ambient temperature compensation module, which collects the ambient temperature in real time. The control board is also used to adjust the parameters of the closed-loop feedback control algorithm according to the difference between the ambient temperature and the preset ambient reference value.

4. The system according to claim 2, characterized in that, The control board is also used to invoke the closed-loop feedback control algorithm when an abnormal situation is detected, and control the heating power of the heating film according to the temperature difference feedback between the cavity air temperature and the preset air temperature until the cavity air temperature reaches the preset air temperature. The abnormal situation includes at least one of the abnormal detection of the incubation metal temperature or the abnormal setting of the preset metal temperature.

5. The system according to claim 1, characterized in that, The incubation plate includes an upper incubation plate and a lower incubation plate, with the heating film attached to the upper and lower incubation plates respectively, and the second temperature sensor is disposed on the upper incubation plate or the lower incubation plate.

6. The system according to claim 5, characterized in that, The upper and lower incubation plates are provided with shallow groove structures on their opposite surfaces, which are used to position the heating film.

7. The system according to claim 5, characterized in that, The upper incubation plate, the heating film, and the lower incubation plate are detachably connected.

8. The system according to claim 1, characterized in that, The interior of the insulated box is filled with expanding foam. Alternatively, the interior of the insulated box is filled with expanding foam, and the expanding foam is surrounded by an aluminum foil reflective layer.

9. The system according to claim 1, characterized in that, The cavity formed by the insulated box and the incubation plate is open on one side.

10. The system according to claim 9, characterized in that, The open side of the cavity is provided with a repositionable windproof ring.

Images