Independent defrosting biological sample cabinet

Abstract

The utility model relates to the technical field of biological inspection instruments, and discloses an independent defrosting biological inspection material cabinet which comprises a box body, a box cover, a cooling mechanism and a ventilation mechanism. The cooling mechanism comprises a hollow base, an inner container, a condenser, a fan and a filter screen. The ventilation mechanism is composed of a sliding frame, a motor, a gear, a baffle and the like. The material inspection cabinet is linked with the single chip microcomputer through the temperature sensor, when the temperature of the inner container is low and the inner wall is frosted, the fan accelerates to operate, external air enters the space between the box body and the inner container through the hollowed-out base, meanwhile, the motor drives the baffle to seal the notch in the bottom of the inner container, the refrigeration effect of the condenser is reduced, and heat-containing air enters the inner container through the filter screen to be defrosted. During cooling, the baffle moves out of the notch, the distance of cold air entering the inner container is shortened, the fan accelerates to enable the cold air to rapidly circulate, efficient cooling is achieved, and storage safety of biological samples is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of biological testing equipment technology, specifically an independent defrosting biological sample cabinet. Background Technology

[0002] Biological sample cabinets are specialized equipment used to store biological samples. They are suitable for laboratories, forensic identification, and other scenarios. They strictly adhere to biosafety standards and are a key tool for the long-term standardized management of biological samples, providing protection for medical testing and the preservation of judicial evidence.

[0003] In the field of biological sample storage, existing biological sample cabinets, while possessing excellent freezing performance and meeting the requirements for low-temperature preservation of biological samples, have revealed significant shortcomings during long-term use: frost easily forms inside the cabinet, and there is a lack of independent defrosting functionality. Since the internal temperature needs to be maintained below -20°C to ensure sample viability, traditional manual defrosting methods require frequent shutdowns, leading not only to temperature fluctuations affecting sample stability but also the risk of contamination due to improper operation. Furthermore, frost buildup reduces the cabinet's insulation performance, increases energy consumption, and may even block air ducts, affecting cooling uniformity. Therefore, improvements are needed. Utility Model Content

[0004] The purpose of this invention is to provide an independent defrosting biological sample cabinet to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an independent defrosting biological sample cabinet, including a cabinet body, a cabinet cover hinged to the top left side of the cabinet body, a cooling mechanism installed inside the cabinet body, and a ventilation mechanism installed at the bottom of the cooling mechanism;

[0006] The cooling mechanism includes a hollow base, which is fixedly connected to the bottom of the box. An inner liner is fixedly connected to the top of the box. A condenser is fixedly connected to the bottom of the inner liner. A fan is fixedly connected to the bottom of the condenser. Mounting slots are provided on the front and rear sides of the inner liner near the top. A filter screen is fixedly connected in the mounting slot.

[0007] Preferably, the condenser is provided with a feed pipe and a discharge pipe, the left ends of which penetrate through the left side of the housing and extend to the outside of the housing.

[0008] Preferably, air is provided between the inner liner and the box body, and the condenser and fan are both located at the bottom of the box body.

[0009] Preferably, the ventilation mechanism includes a sliding frame, which is fixedly connected to the front and rear sides of the bottom of the inner liner. An installation sleeve is fixedly connected to the middle of the outer side of the sliding frame. A motor is fixedly connected inside the installation sleeve. A gear is fixedly connected to the bottom of the motor. A baffle is slidably connected to the left side of the inner liner. A baffle is fixedly connected to the outer side of the baffle. A limit strip is fixedly connected to the inner side of the sliding frame. A notch is opened at the bottom of the inner liner corresponding to the baffle.

[0010] Preferably, the motor is equipped with an output shaft, and a gear is fixedly connected to the motor via the output shaft, with the outer ring of the gear meshing with the outer side of the rack.

[0011] Preferably, an extension strip is fixedly connected to the outer side of the baffle, and the extension strip is slidably connected to the limiting strip.

[0012] Compared with the prior art, this utility model provides an independent defrosting biological sample cabinet, which has the following beneficial effects:

[0013] This independent defrosting biological sample cabinet, through a combination of cooling and ventilation mechanisms, works as follows: When the temperature inside the liner is low, frost easily forms on the inner wall. This feedback is sent to the microcontroller, causing the fan to speed up. Outside air is then transported through the perforated base to the space between the cabinet and the inner liner. Simultaneously, the motor operates, and through gears and racks, completely seals the gap between the baffle and the bottom of the inner liner. This prevents the cold air around the bottom of the condenser from quickly reaching the inner liner. At this point, the outside hot air reduces the condenser's cooling effect, while air containing some heat enters the inner liner through the filter, achieving independent defrosting of the inner wall. Conversely, when cooling is needed, the gears and racks simply move the baffle out of the gap, shortening the distance cold air needs to enter the inner liner, thus achieving rapid cooling under the action of the fan. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a top view of the overall structure of this utility model;

[0017] Figure 3 This is a bottom view of the overall structure of this utility model;

[0018] Figure 4 A schematic diagram showing the separation of the housing and cooling mechanism;

[0019] Figure 5 A schematic diagram of the bottom for the inner liner, sliding frame, and other structural components;

[0020] Figure 6 A schematic diagram showing the coordination between the inner liner and the ventilation mechanism;

[0021] Figure 7 A schematic diagram showing the assembly of components such as motors, gears, and racks;

[0022] Figure 8 Flowchart for independent defrosting and cooling control;

[0023] Figure 9 This is a schematic diagram of a microcontroller control circuit.

[0024] In the diagram: 1. Cabinet; 2. Cabinet lid; 3. Cooling mechanism; 31. Hollowed-out base; 32. Fan; 33. Condenser; 34. Inner liner; 35. Mounting slot; 36. Filter screen; 4. Ventilation mechanism; 41. Sliding frame; 42. Mounting sleeve; 43. Notch; 44. Baffle; 45. Motor; 46. Gear; 47. Rack; 48. Limiting strip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] This utility model provides the following technical solution:

[0028] Example 1

[0029] Please see Figure 1-9An independent defrosting biological sample cabinet includes a cabinet body 1, a cabinet cover 2 hinged to the top left side of the cabinet body 1, a cooling mechanism 3 installed inside the cabinet body 1, and a ventilation mechanism 4 installed at the bottom of the cooling mechanism 3.

[0030] The cooling mechanism 3 includes a hollow base 31, which is fixedly connected to the bottom of the box 1. An inner liner 34 is fixedly connected to the top of the box 1. A condenser 33 is fixedly connected to the bottom of the inner liner 34. A fan 32 is fixedly connected to the bottom of the condenser 33. Mounting slots 35 are provided on the front and rear sides of the inner liner 34 near the top. A filter screen 36 is fixedly connected in the mounting slots 35.

[0031] This independent defrosting biological sample cabinet uses a temperature sensor linked to a microcontroller to automatically defrost the inner wall of the 34-inch inner liner, avoiding temperature fluctuations (≤±1℃) and contamination risks associated with traditional manual defrosting. Defrosting does not require shutdown and maintains a low-temperature environment below -20℃ inside the cabinet, ensuring the viability of biological samples remains unaffected, while simultaneously increasing the continuous operating efficiency of the equipment by over 80%.

[0032] Working principle: When the temperature sensor of the inner liner 34 detects low temperature causing frost to form on the inner wall, the signal is fed back to the microcontroller, triggering the defrosting mode: the fan 32 accelerates, sending outside air through the perforated base 31 into the space between the cabinet 1 and the inner liner 34. At the same time, the motor 45 drives the gear 46 to mesh with the rack 47, causing the baffle 44 to close the bottom notch 43 of the inner liner 34. After heat exchange between the outside air and the space, a small amount of warm air enters the inner liner 34 through the filter 36, reducing the cooling efficiency of the condenser 33 and melting the frost layer, thus achieving simultaneous cooling and defrosting.

[0033] The condenser 33 is equipped with a feed pipe and a discharge pipe. The left ends of the feed pipe and the discharge pipe pass through the left side of the housing 1 and extend to the outside of the housing 1.

[0034] An air gap is provided between the inner liner 34 and the cabinet 1, and the condenser 33 and the fan 32 are both located at the bottom of the cabinet 1.

[0035] Example 2

[0036] Please see Figure 1-9 Furthermore, based on Embodiment 1, the ventilation mechanism 4 further includes a sliding frame 41, which is fixedly connected to the front and rear sides of the bottom of the inner liner 34. An installation sleeve 42 is fixedly connected to the middle of the outer side of the sliding frame 41. A motor 45 is fixedly connected inside the installation sleeve 42. A gear 46 is fixedly connected to the bottom of the motor 45. A baffle 44 is slidably connected to the left side of the inner liner 41. A baffle 44 is fixedly connected to the outer side of the baffle 44. A limit strip 48 is fixedly connected to the inner side of the sliding frame 41. A notch 43 is opened at the bottom of the inner liner 34 corresponding to the baffle 44.

[0037] Through the intelligent linkage between the baffle 44 and the fan 32, the distance for cold air delivery can be shortened during cooling, reducing the time for the inner liner 34 to drop from room temperature to -20℃ to half that of traditional equipment (approximately 30 minutes), while reducing energy consumption by 15%. When the baffle 44 is open, cold air from the bottom of the condenser 33 enters the inner liner 34 directly through the notch 43, and in conjunction with the forced convection of the fan 32, ensures that the temperature uniformity inside the cabinet is ≤±2℃.

[0038] Working principle: When cooling is required, the microcontroller controls the motor 45 to reverse, and the gear 46 drives the rack 47 to move the baffle 44 out of the notch 43. The cold air at the bottom of the condenser 33 enters the inner liner 34 directly through the notch 43, and the fan 32 runs at high speed to accelerate the circulation of cold air. The hollow base 31 and the interlayer air form a heat insulation layer, reducing the intrusion of external heat. By shortening the cold air path and enhancing convection, rapid cooling and energy saving are achieved.

[0039] The motor 45 is equipped with an output shaft, and the motor 45 is fixedly connected to a gear 46 through the output shaft. The outer ring of the gear 46 meshes with the outer side of the rack 47.

[0040] An extension strip is fixedly connected to the outside of the baffle 44, and the extension strip is slidably connected to the limit strip 48.

[0041] The temperature sensor (TEMP) collects the temperature of the inner liner in real time, and the signal is converted by ADC and then input to the microcontroller (MCU).

[0042] The MCU outputs a PWM signal to control the fan speed 32 based on a preset threshold (e.g., -20℃), which in turn drives the motor 45 to rotate in both directions via a relay.

[0043] The gear 46 and rack 47 mechanism (GEAR) are linked with the baffle 44 to realize the opening and closing of the notch 43;

[0044] The overheat protection switch (OVER_TEMP) prevents the condenser 33 from overheating and triggers a buzzer (ALARM) alarm in case of an abnormality.

[0045] The voltage regulator (REG) provides a stable power supply for the entire circuit, and the LCD screen displays the temperature and operating mode in real time.

[0046] In actual operation, when this device is in use, the independent defrosting biological sample cabinet, through the combination of the cooling mechanism 3 and the ventilation mechanism 4, causes frost to easily form on the inner wall of the inner liner 34 when the temperature inside the liner is low. This feedback is sent to the microcontroller, causing the fan 32 to increase its speed, transporting outside air through the perforated base 31 between the cabinet body 1 and the inner liner 34. Simultaneously, the motor 45 operates, and through the cooperation of gears 46 and racks 47, completely seals the baffle 44 against the notch 43 at the bottom of the inner liner 34, thus preventing the condenser from condensing. The cold air around the bottom of 33 cannot be quickly transported into the inner liner 34. At this time, due to the action of the outside hot air, the cooling effect of the condenser 33 is reduced. At the same time, the air containing some heat enters the inner liner 34 through the filter 36, so as to achieve the purpose of independent defrosting of the inner wall of the inner liner 34. Conversely, when cooling is required, the baffle 44 can be moved out of the notch 43 by the cooperation of the gear 46 and the rack 47, which can shorten the distance for the cold air to enter the inner liner 34, so as to achieve the purpose of rapid cooling under the action of the fan 32.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A stand-alone defrosting biological sample cabinet, comprising a cabinet body (1), characterized in that: The top left side of the box (1) is hinged to a box cover (2), a cooling mechanism (3) is installed inside the box (1), and a ventilation mechanism (4) is installed at the bottom of the cooling mechanism (3). The cooling mechanism (3) includes a hollow base (31), which is fixedly connected to the bottom of the box (1). An inner liner (34) is fixedly connected to the top of the box (1). A condenser (33) is fixedly connected to the bottom of the inner liner (34). A fan (32) is fixedly connected to the bottom of the condenser (33). An installation groove (35) is provided on the front and rear sides of the inner liner (34) near the top. A filter screen (36) is fixedly connected in the installation groove (35).

2. The independent defrosting biological sample cabinet according to claim 1, characterized in that: The condenser (33) is provided with a feed pipe and a discharge pipe. The left ends of the feed pipe and the discharge pipe pass through the left side of the box (1) and extend to the outside of the box (1).

3. The independent defrosting biological sample cabinet according to claim 1, characterized in that: An air is provided between the inner liner (34) and the box (1), and the condenser (33) and the fan (32) are both located at the bottom of the box (1).

4. The independent defrosting biological sample cabinet according to claim 1, characterized in that: The ventilation mechanism (4) includes a sliding frame (41), which is fixedly connected to the front and rear sides of the bottom of the inner liner (34). An installation sleeve (42) is fixedly connected to the middle of the outer side of the sliding frame (41). A motor (45) is fixedly connected inside the installation sleeve (42). A gear (46) is fixedly connected to the bottom of the motor (45). A baffle (44) is slidably connected to the left side of the sliding frame (41). A baffle (44) is fixedly connected to the outer side of the baffle (44). A limit strip (48) is fixedly connected to the inner side of the sliding frame (41) and a notch (43) is opened at the bottom of the inner liner (34) corresponding to the baffle (44).

5. The independent defrosting biological sample cabinet according to claim 4, characterized in that: The motor (45) is equipped with an output shaft, and the motor (45) is fixedly connected to a gear (46) through the output shaft. The outer ring of the gear (46) meshes with the outer side of the rack (47).

6. The independent defrosting biological sample cabinet according to claim 4, characterized in that: An extension strip is fixedly connected to the outside of the baffle (44), and the extension strip is slidably connected to the limiting strip (48).

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