Defrosting and draining device and vehicle-mounted refrigerator applying same

Abstract

The utility model discloses a defrosting and draining device and vehicle refrigerator applying it, and the defrosting and draining device comprises: a refrigerator inner container, the bottom wall in its inside is provided with water collecting structure, the water collecting structure is used for collecting the defrosting water formed by the frost layer of the refrigerator inner container, the refrigerator inner container is correspondingly provided with heating structure with water collecting structure, and the heating structure is used for heating the defrosting water in water collecting structure and forms water vapor, the channel of the communication of the refrigerator inner container and the outside world is sealed and is provided with valve structure, and the valve structure is used for discharging water vapor in the refrigerator inner container to the outside world. Thus the defrosting water in water collecting structure is heated to form water vapor through the heating structure, and then the water vapor is discharged to the outside world through the valve structure, thereby discharging the defrosting water in the refrigerator inner container to the outside world in time, thereby effectively avoiding that the refrigerator inner container breeds bacteria due to the residual defrosting water, ensuring food safety and user health, and guaranteeing normal use of the user next time.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a defrosting and drainage device and a vehicle refrigerator using the same. Background Technology

[0002] Most compressor-cooled car refrigerators on the market currently use a direct-cooling refrigeration structure, with their evaporator heat transfer tubes designed as a coiled structure, winding around the inner liner of the car refrigerator on the foam layer side. This structure has the advantages of a large heat transfer area and saving internal space. However, this technology has the following drawbacks:

[0003] During long-term use, slight frost may appear on the inner wall of the car refrigerator, affecting the user experience. Moreover, this frost layer cannot be automatically defrosted, causing it to gradually thicken. When the car refrigerator is not in use for an extended period after a power outage, the temperature inside the refrigerator rises rapidly, and the frost melts quickly, forming defrost water. If the defrost water cannot be drained in time, it will accumulate inside the refrigerator. The residual defrost water can easily breed bacteria, affecting normal use and potentially causing food safety and user health issues. Utility Model Content

[0004] This invention provides a defrosting drainage device and a vehicle refrigerator using the same, which solves the problem in the prior art that the inner liner of the refrigerator cannot drain defrost water, and the residual defrost water is prone to bacterial growth.

[0005] The technical solution of this utility model is a defrosting and drainage device, comprising:

[0006] The refrigerator liner has a water collection structure on its bottom wall, which is used to collect defrost water formed by the frost layer in the refrigerator liner.

[0007] The refrigerator liner is equipped with a heating structure corresponding to the water collection structure. The heating structure is used to heat the defrost water in the water collection structure to form water vapor.

[0008] A valve structure is sealed inside the channel connecting the refrigerator liner to the outside, and the valve structure is used to discharge water vapor inside the refrigerator liner to the outside.

[0009] Furthermore, the channel is located on the side wall or top of the refrigerator liner above the water collection structure.

[0010] Furthermore, the valve structure includes a first valve body, in which a first hollow shaft is disposed, and at least one valve core is matchedly disposed within the first hollow shaft; the two ends of the first hollow shaft are respectively connected to the refrigerator liner and the outside atmosphere.

[0011] Furthermore, a first insulation layer is provided around the first hollow shaft core of the first valve body, and the first insulation layer is used to prevent the cold air inside the refrigerator liner from escaping.

[0012] Furthermore, a micro fan is also integrated inside the first hollow shaft core, which is used to accelerate the gas flow inside the first hollow shaft core.

[0013] Furthermore, a temperature detection device and a humidity detection device are also provided inside the refrigerator liner. Both the temperature detection device and the humidity detection device are electrically connected to the controller. The controller is used to start and stop the heating structure or the compressor based on the detection data of the temperature detection device and the humidity detection device.

[0014] Furthermore, a first pressure detection device is provided inside the refrigerator liner, which is used to detect the pressure inside the refrigerator liner;

[0015] A second pressure detection device is installed outside the inner liner of the refrigerator, which is used to detect the external atmospheric pressure.

[0016] Both the first pressure detection device and the second pressure detection device are electrically connected to the controller. The controller is used to calculate the pressure difference between the first pressure detection device and the second pressure detection device in real time and dynamically monitor the air pressure changes inside the refrigerator liner.

[0017] Furthermore, the valve structure includes a second valve body, in which a second hollow shaft is disposed, and the two ends of the second hollow shaft are respectively connected to the refrigerator liner and the outside atmosphere;

[0018] At least one elastic valve core is matched and provided inside the second hollow shaft core. The elastic valve core is used to automatically seal when there is no airflow impact and to open under the action of airflow pressure to discharge water vapor in the refrigerator liner to the outside.

[0019] Furthermore, a second insulation layer is provided around the second hollow shaft core of the second valve body, and the second insulation layer is used to prevent the cold air inside the refrigerator from escaping.

[0020] This utility model also proposes a vehicle-mounted refrigerator, which includes the defrosting and drainage device described above.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] This invention uses a heating structure to heat the defrost water in the water collection structure into steam, which is then discharged to the outside through a valve structure. This effectively removes the defrost water from the refrigerator's inner liner, preventing bacteria growth due to residual defrost water, ensuring food safety and user health, and guaranteeing normal use next time. Attached Figure Description

[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 invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects and not to describe a particular order.

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art 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.

[0025] Figure 1 This is a schematic diagram of the structure of the vehicle-mounted refrigerator proposed in this utility model;

[0026] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0027] Figure 3 for Figure 1 Cross-sectional view along the BB direction;

[0028] Figure 4 This is a cross-sectional view of the first valve structure proposed in this utility model;

[0029] Figure 5 This is a cross-sectional view of the second valve structure proposed in this utility model;

[0030] Figure 6 This is a cross-sectional view of the third valve structure proposed in this utility model;

[0031] Figure 7 This is a schematic diagram of the logic for handling defrost water in a vehicle refrigerator according to the present invention.

[0032] Figure label:

[0033] 10. Refrigerator liner;

[0034] 101. Temperature detection device; 102. Humidity detection device; 103. First pressure detection device; 104. Second pressure detection device;

[0035] 20. Water collection structure;

[0036] 30. Heating structure;

[0037] 40. Valve structure;

[0038] 401. First valve body; 402. First hollow shaft core; 403. Valve core; 404. First insulation layer; 405. Miniature fan; 406. Second valve body; 407. Second hollow shaft core; 408. Elastic valve core; 409. Second insulation layer;

[0039] 50. Box body;

[0040] 60. Box door;

[0041] 70. Compressor;

[0042] 80. Foamed layer;

[0043] 90. Evaporator heat transfer tubes. Detailed Implementation

[0044] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present utility model, and does not imply that every embodiment of the present utility model must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0045] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0046] Most compressor-cooled car refrigerators on the market currently use a direct-cooling refrigeration structure, with their evaporator heat transfer tubes designed as a coiled structure, winding around the inner liner of the car refrigerator on the foam layer side. This structure has the advantages of a large heat transfer area and saving internal space. However, this technology has the following drawbacks:

[0047] During long-term use, slight frost may appear on the inner wall of the car refrigerator, affecting the user experience. Moreover, this frost layer cannot be automatically defrosted, causing it to gradually thicken. When the car refrigerator is not in use for an extended period after a power outage, the temperature inside the refrigerator rises rapidly, and the frost melts quickly, forming defrost water. If the defrost water cannot be drained in time, it will accumulate inside the refrigerator. The residual defrost water can easily breed bacteria, affecting normal use and potentially causing food safety and user health issues.

[0048] Therefore, in some embodiments, such as Figure 1 and Figure 2 As shown, this utility model proposes a defrosting drainage device that can heat the defrosting water formed by the frost layer inside the refrigerator liner into water vapor and discharge it to the outside, comprising:

[0049] The refrigerator liner 10 has a water collection structure 20 on its bottom wall, which is used to collect defrost water formed by the frost layer of the refrigerator liner 10.

[0050] The refrigerator inner liner 10 is equipped with a heating structure 30 corresponding to the water collection structure 20. The heating structure 30 is used to heat the defrosting water in the water collection structure 20 to form water vapor.

[0051] A valve structure 40 is sealed in the channel connecting the refrigerator liner 10 and the outside. The valve structure 40 is used to discharge water vapor inside the refrigerator liner 10 to the outside.

[0052] It should be noted that the heating structure 30 proposed in this embodiment is preferably a heating film made of low-power flexible electric heating film material. This achieves rapid heating, precise temperature control, and energy saving through the efficient heat conduction and uniform heating characteristics of the flexible electric heating film. Of course, the heating structure 30 can also be infrared heating or PTC heating, which is not limited here. Furthermore, the defrosting and drainage device proposed in this embodiment is applied to small refrigerators (such as car refrigerators and portable refrigerators). This small refrigerator includes a cabinet 50, inside which is a refrigerator liner 10 for storing and refrigerating items. The cabinet 50 is also fitted with an openable door 60. The water collection structure 20 can also be used to collect liquids spilled from items (such as beverage bottles) placed inside the refrigerator liner 10.

[0053] Furthermore, the heating structure 30 proposed in this embodiment is preferably attached to the outer bottom wall of the refrigerator inner liner 10 or below the evaporator, so as to better heat the defrosting water in the water collection structure 20.

[0054] In this embodiment, the small refrigerator or defrosting drainage device is equipped with a controller that is electrically connected to the heating structure 30 and the valve structure 40 respectively.

[0055] In this way, when the mini-refrigerator is in normal cooling cycle, the heating structure 30 and valve structure 40 do not start, and the compressor 70 in the refrigeration system will start and stop according to the temperature inside the refrigerator liner 10 to ensure that the temperature inside the refrigerator liner 10 is maintained at the preset refrigeration temperature to meet the cooling needs of the refrigerator liner 10.

[0056] When the vehicle refrigerator experiences a prolonged power outage for some reason (the heating structure 30, valve structure 40, and controller can maintain operation for a period of time through an independent backup power supply), the temperature inside the refrigerator liner 10 will continuously rise, causing the frost layer inside the refrigerator liner 10 to melt and form defrost water that accumulates in the water collection structure 20 below. Then, when a set time is reached or the controller receives a control signal (such as when the environmental parameters inside the refrigerator liner 10 exceed a set threshold), the controller will activate the heating structure 30 and valve structure 40, thereby heating and evaporating the defrost water in the water collection structure 20 to form water vapor. The water vapor is then discharged to the outside through the valve structure 40, thus discharging the defrost water from the refrigerator liner 10 to the outside.

[0057] Therefore, this utility model heats the defrost water in the water collection structure 20 to form water vapor through the heating structure 30, and then the water vapor is discharged to the outside through the valve structure 40, thereby timely discharging the defrost water in the refrigerator liner 10 to the outside, thus effectively preventing bacteria from growing in the refrigerator liner 10 due to residual defrost water, ensuring food safety and user health, and guaranteeing normal use by the user next time.

[0058] In some embodiments, the channel is disposed on the side wall or top of the refrigerator liner 10 above the water collection structure 20.

[0059] It should be noted that the valve structure 40 forms an interference fit with the inner wall of the channel to ensure sealing and prevent cold air from escaping.

[0060] This design prevents defrosting water from flowing into the channel and affecting the normal use of the valve structure 40; and the channel is located on the side wall or top of the refrigerator inner liner 10, which is higher than the water collection structure 20, indicating that the valve structure 40 is higher than the water collection structure 20, which facilitates water vapor to be better discharged from the refrigerator inner liner 10 to the outside through the valve structure 40.

[0061] In some embodiments, such as Figure 4 As shown, this embodiment proposes a first valve structure 40, including: a first valve body 401, a first hollow shaft core 402 is provided inside the first valve body 401, and at least one valve core 403 is matchedly provided inside the first hollow shaft core 402; the two ends of the first hollow shaft core 402 are respectively connected to the refrigerator inner liner 10 and the outside atmosphere.

[0062] It should be noted that this embodiment proposes to provide two valve cores 403, that is, a double-layer valve core 403 is provided inside the first hollow shaft core 402; and both valve cores 403 are electrically connected to the controller so that the controller can control the opening or closing of the valve cores 403.

[0063] When the car refrigerator experiences a prolonged power outage for any reason, the temperature inside the refrigerator liner 10 will continuously rise, causing the frost layer inside the liner 10 to melt and form defrost water that accumulates in the water collection structure 20 below. Then, at a set time or when the controller receives a control signal, the controller will activate the heating structure 30 and the valve core 403, thereby heating the defrost water in the water collection structure 20 into steam. The steam is then discharged to the outside through the first hollow shaft core 402, thus promptly removing the defrost water from the refrigerator liner 10. This effectively prevents bacteria from growing in the refrigerator liner 10 due to residual defrost water, ensuring food safety and user health, and guaranteeing normal use for the next time.

[0064] Specifically, the first valve body 401 is provided with a first insulation layer 404 around the first hollow shaft core 402, and the first insulation layer 404 is used to prevent the cold air inside the refrigerator liner 10 from escaping.

[0065] In this way, the first insulation layer 404 can prevent the cold air inside the refrigerator liner 10 from escaping to the outside through the valve structure 40, effectively blocking the heat exchange between the refrigerator liner 10 and the external environment, reducing the loss of cold air, maintaining the low temperature stability inside the refrigerator liner 10, helping to reduce temperature fluctuations inside the refrigerator liner 10, and ensuring a more uniform refrigeration effect; and by reducing the loss of cold air, the compressor 70 does not need to start refrigeration frequently, which can significantly reduce energy consumption.

[0066] In other embodiments, such as Figure 5 As shown, a micro fan 405 is also integrated inside the first hollow shaft core 402, and the micro fan 405 is used to accelerate the gas flow inside the first hollow shaft core 402.

[0067] It should be noted that the micro fan 405 proposed in this embodiment is independently installed in the first hollow shaft core 402 or integrated on the valve core 403; of course, this embodiment is illustrated by the example that the micro fan 405 can be independently installed in the first hollow shaft core 402.

[0068] When the heating structure 30 heats the defrost water in the water collection structure 20 to form steam, the controller opens the valve core 403 and starts the micro fan 405 to expedite the timely removal of steam from the refrigerator liner 10 to the outside. Furthermore, the micro fan 405 has multi-speed adjustment capabilities, dynamically adjusting its speed based on the pressure difference between the inside and outside of the refrigerator liner 10 to achieve precise control of gas flow.

[0069] In other embodiments, such as Figure 6 As shown, this embodiment proposes a second valve structure 40, including: a second valve body 406, a second hollow shaft core 407 is provided inside the second valve body 406, and the two ends of the second hollow shaft core 407 are respectively connected to the refrigerator inner liner 10 and the outside atmosphere;

[0070] At least one elastic valve core 408 is matched and provided inside the second hollow shaft core 407. The elastic valve core 408 is used to automatically seal when there is no airflow impact and to open under the action of airflow pressure to discharge water vapor in the refrigerator liner 10 to the outside.

[0071] It should be noted that the elastic valve core 408 is presented as an example in this embodiment; and the elastic valve core 408 does not need to be connected to the controller. That is, the valve structure 40 proposed in this embodiment is a passive one-way valve (the one-way valve only allows water vapor in the refrigerator liner 10 to be discharged to the outside, and does not allow airflow to flow in the opposite direction). Its working principle is purely mechanical, and its opening and closing depends entirely on the airflow pressure difference, without requiring or relying on external electrical signals or controllers.

[0072] In this way, when the cabinet door 60 is closed, the refrigeration system is operating normally, and there is no airflow impacting the second hollow shaft core 407, the elastic valve core 408 will adhere tightly to the second hollow shaft core 407 due to its own elastic force or gravity, forming a sealing barrier that completely blocks the airflow.

[0073] When the heating structure 30 heats the defrost water in the water collection structure 20 to form steam, the pressure inside the refrigerator liner 10 continuously increases. At this time, airflow pressure is generated inside the second hollow shaft core 407. This airflow pressure pushes the elastic valve core 408 to overcome its own elastic force or gravity, causing it to open and move away from the second hollow shaft core 407, thus allowing the second hollow shaft core 407 to be unobstructed and allowing the steam inside the refrigerator liner 10 to be discharged to the outside through the second hollow shaft core 407. Of course, once the airflow disappears or the pressure decreases, the elastic valve core 408 will quickly rebound and reseal, preventing backflow of gas.

[0074] Specifically, the second valve body 406 is provided with a second insulation layer 409 around the second hollow shaft core 407, and the second insulation layer 409 is used to prevent the cold air inside the refrigerator liner 10 from escaping.

[0075] In this way, the second insulation layer 409 can prevent the cold air inside the refrigerator liner 10 from escaping to the outside through the valve structure 40, effectively blocking the heat exchange between the refrigerator liner 10 and the external environment, reducing the loss of cold air, maintaining the low temperature stability inside the refrigerator liner 10, helping to reduce temperature fluctuations inside the refrigerator liner 10, and ensuring a more uniform refrigeration effect; and by reducing the loss of cold air, the compressor 70 does not need to start refrigeration frequently, which can significantly reduce energy consumption.

[0076] In some embodiments, such as Figure 2 As shown, a temperature detection device 101 and a humidity detection device 102 are also provided inside the refrigerator liner 10. Both the temperature detection device 101 and the humidity detection device 102 are electrically connected to the controller. The controller is used to start and stop the heating structure 30 or the compressor 70 according to the detection data of the temperature detection device 101 and the humidity detection device 102.

[0077] It should be noted that, in this embodiment, the temperature detection device 101 is located in the middle of the refrigerator liner 10, and the humidity detection device 102 is located on the inner wall of the refrigerator liner 10 adjacent to the water collection structure 20 or within the water collection structure 20, thus enabling faster and more timely acquisition of real-time temperature and humidity. Of course, the temperature detection device 101 and the humidity detection device 102 can also be located in other positions within the refrigerator liner 10 according to actual needs, and this is not limited here.

[0078] Thus, as Figure 7 As shown, after the timer in the controller meets the temperature acquisition cycle t1, the temperature detection device 101 will collect the temperature T1 inside the refrigerator liner 10 in real time and upload it to the controller. Then the controller will determine whether the temperature T1 is less than or equal to the first set temperature threshold Ta. If the temperature T1 is greater than the first set temperature threshold Ta, the timer will be reset to zero and the current operating state will be maintained. If the temperature T1 is less than or equal to the first set temperature threshold Ta, the vehicle refrigerator will enter the heat preservation mode. At this time, the compressor 70 will stop running and maintain the existing temperature inside the refrigerator liner 10.

[0079] If the vehicle refrigerator loses power, it will switch to defrost water treatment mode. The timer in the controller will start timing the power outage duration t3. The controller will then determine whether the power outage duration t3 is greater than or equal to the first set power outage time threshold t3h. If the power outage duration t3 ≥ the first set power outage time threshold t3h, the controller will execute the immediate defrost water treatment mode. Then, the temperature detection device 101 will collect the temperature T2 inside the refrigerator liner 10 in real time after the power outage, and the humidity detection device 102 will collect the humidity Ts inside the refrigerator liner 10 in real time after the power outage. If the power outage duration t3 < the first set power outage time threshold t3h, the controller will execute the delayed defrost water treatment mode. At this time, the timer in the controller will continue timing the power outage duration t3, and the power outage duration t3h will be determined. 3. Does the second set power outage time threshold t3h' ≤ power outage duration t3 < first set power outage time threshold t3h satisfy the condition? If the power outage duration t3 satisfies the condition that the second set power outage time threshold t3h' ≤ power outage duration t3 < first set power outage time threshold t3h, then the temperature detection device 101 collects the temperature T2 inside the refrigerator liner 10 in real time after the power outage, and the humidity detection device 102 collects the humidity Ts inside the refrigerator liner 10 in real time after the power outage. If the power outage duration t3 does not satisfy the condition that the second set power outage time threshold t3h' ≤ power outage duration t3 < first set power outage time threshold t3h, then the controller will re-determine whether the power outage duration t3 is greater than or equal to the first set power outage time threshold t3h and make subsequent judgments.

[0080] Then the controller determines whether the temperature T2 is greater than or equal to the second set temperature threshold Tb and whether the humidity Ts is greater than or equal to the set humidity threshold Tsh. If the temperature T2 is less than the second set temperature threshold Tb and the humidity Ts is less than the set humidity threshold Tsh, the controller will restart the timer for the power outage duration t3 and make subsequent judgments. If the temperature T2 is greater than or equal to the second set temperature threshold Tb and the humidity Ts is greater than or equal to the set humidity threshold Tsh, it indicates that defrost water has begun to form inside the refrigerator liner 10 and has accumulated in the water collection structure 20 below. At this time, the controller triggers the heating structure 30 to work, thereby heating the water collection structure 20 and causing the defrost water to evaporate and form water vapor.

[0081] Therefore, after the vehicle refrigerator is powered off, the controller will first wait for the set power outage time threshold t3h. The temperature detection device 101 and humidity detection device 102 will then collect the temperature and humidity and upload them to the controller to avoid the heating structure 30 being accidentally triggered due to a brief power outage or environmental fluctuations. Then, the controller will work together to determine whether defrost water has formed based on the collected temperature and humidity, and trigger the start of the heating structure 30 to heat and evaporate the defrost water in the water collection structure 20 in a timely manner to form water vapor.

[0082] In some embodiments, such as Figure 2As shown, a first pressure detection device 103 is provided inside the refrigerator liner 10, which is used to detect the pressure inside the refrigerator liner 10;

[0083] A second pressure detection device 104 is provided outside the refrigerator inner liner 10, which is used to detect the external atmospheric pressure.

[0084] Both the first pressure detection device 103 and the second pressure detection device 104 are electrically connected to the controller. The controller is used to calculate the pressure difference between the first pressure detection device 103 and the second pressure detection device 104 in real time and dynamically monitor the air pressure changes inside the refrigerator liner 10.

[0085] It should be noted that in this embodiment, the first pressure detection device 103 is installed in the upper part of the refrigerator inner liner 10, and the second pressure detection device 104 is installed above the valve structure 40 on the outside of the cabinet 50, without obstructing the gas flow within the valve structure 40. In this case, the measurement range of the first pressure detection device 103 and the second pressure detection device 104 covers the working air pressure environment of the vehicle refrigerator. Of course, the first pressure detection device 103 can also be installed in other positions inside the refrigerator inner liner 10, and the second pressure detection device 104 can also be installed in other positions on the outside of the cabinet 50, depending on actual needs; this is not limited here.

[0086] Thus, as Figure 7 As shown, when the vehicle refrigerator enters the heat preservation mode, the controller then determines whether the vehicle refrigerator is powered off. If the vehicle refrigerator is powered off, the timer in the controller meets the heat preservation timing cycle t2. At this time, the inner liner 10 of the refrigerator is under negative pressure, i.e., ΔL = L1 - L2 < the set pressure difference threshold ΔLs. The valve structure 40 or valve core 403 remains closed; there is no obvious defrost water in the water collection structure 20, and no treatment is required. Moreover, unless the pressure detection device malfunctions, the internal temperature of the vehicle refrigerator is lower than the external temperature during normal cooling, and the situation of pressure difference ΔL ≥ the set pressure difference threshold ΔLs will not occur.

[0087] If the vehicle refrigerator loses power, and the heating structure 30 has already heated the water collection structure 20, causing the defrost water to evaporate into steam, the pressure inside the refrigerator will gradually increase as the evaporation process proceeds. At this time, the first pressure detection device 103 collects the pressure L1 inside the refrigerator liner 10 in real time after the power failure, and the second pressure detection device 104 collects the atmospheric pressure L2 outside the refrigerator body 50 in real time after the power failure. Then the controller calculates the pressure difference ΔL = L1 - L2 and determines whether the pressure difference ΔL is greater than or equal to the set pressure difference threshold ΔLs. If the pressure difference ΔL < the set threshold... The pressure difference threshold ΔLs indicates that the pressure inside the refrigerator liner 10 is normal. The heating structure 30 continues to heat the water collection structure 20, and the first pressure detection device 103 and the second pressure detection device 104 continue to collect the corresponding pressure values. If the pressure difference ΔL ≥ the set pressure difference threshold ΔLs, it means that the pressure inside the refrigerator liner 10 is higher than the pressure outside the cabinet 50. Then the controller will open the valve structure 40 or the valve core 403 to allow the water vapor inside the refrigerator liner 10 to be automatically discharged outside the cabinet 50, thereby preventing water vapor condensation and backflow and bacterial growth.

[0088] Then, the controller's timer acquires the heating duration t4 of the heating structure 30 and determines whether the heating duration t4 is greater than the set heating time threshold t4h. If the heating duration t4 ≤ the set heating time threshold t4h, the heating structure 30 continues to work, and the first pressure detection device 103 and the second pressure detection device 104 continue to collect the corresponding pressure values. If the heating duration t4 > the set heating time threshold t4h, the controller then determines whether the pressure difference ΔL is less than the safety threshold ΔLq. If the pressure difference ΔL ≥ the safety threshold ΔLq, the controller automatically extends the working time of the heating structure 30, and the first pressure detection device 103 and the second pressure detection device 104 continue to collect the corresponding pressure values. If the pressure difference ΔL < the safety threshold ΔLq, the controller will close the valve structure 40 or the valve core 403, indicating that the defrost water in the refrigerator liner 10 has completely evaporated, and the water vapor formed by evaporation has been discharged to the outside in time, further improving the stability and adaptability of the vehicle refrigerator, thereby effectively preventing bacteria from growing in the refrigerator liner 10 due to residual defrost water, ensuring food safety and user health, and guaranteeing normal use by the user next time.

[0089] This embodiment uses a combination design of "heating structure 30 + pressure detection device + differential pressure ΔL control valve structure 40" to achieve logical linkage between the detection device and the execution components (heating structure 30 and valve structure 40), forming a closed-loop control system. This enables automatic treatment and discharge of defrost water, thus solving the problem of defrost water accumulation and bacterial growth after a power outage in a vehicle refrigerator. It features a simple structure, controllable cost, strong practicality, and easy integration into existing vehicle refrigerator systems, achieving automatic, intelligent, and low-energy-consumption defrost water treatment, and has good market application prospects.

[0090] Furthermore, the controller in this invention is preferably an embedded microcontroller with multiple input / output interfaces. It can receive signals from the detection device and drive the actuator to move. It has certain logic judgment and delay control functions, and can flexibly add or adjust functions according to needs to adapt to different application scenarios and performance requirements, thus possessing expandability. Of course, the controller can also be a microcontroller or a PLC (programmable logic controller), which is not limited here.

[0091] When the vehicle-mounted refrigerator loses power, the backup power supply first supplies power to the controller so that the timer in the controller can calculate the power outage duration t3. When the power outage duration t3 ≥ the first set time threshold t3h, the backup power supply then supplies power to the temperature detection device 101 and the humidity detection device 102 to collect the temperature T2 and humidity Ts inside the refrigerator liner 10. When the temperature T2 ≥ the second set temperature threshold Tb and the humidity Ts ≥ the set humidity threshold Tsh, the backup power supply then supplies power to the heating structure 30 (and at this time, the power supply to the temperature detection device 101 and the humidity detection device 102 can be stopped to save energy) so that the heating structure 30 can collect water. The defrost water inside structure 20 is heated and evaporated to form water vapor. Then, the backup power supply supplies power to the first pressure detection device 103 and the second pressure detection device 104 so that the controller can calculate the pressure difference ΔL. When the pressure difference ΔL ≥ the set pressure difference threshold ΔLs, the backup power supply supplies power to the valve structure 40 or the valve core 403 so that the valve structure 40 or the valve core 403 opens to automatically discharge the water vapor inside the refrigerator liner 10. When the pressure difference ΔL < the safety threshold ΔLq, it indicates that the defrost water inside the refrigerator liner 10 has been discharged to the outside in time, and the power supply to the valve structure 40 or the valve core 403 is stopped. At this time, the backup power supply is in a completely de-energized state and does not supply power to any device.

[0092] In some embodiments, the present invention also provides a vehicle refrigerator, which includes the defrosting and drainage device described above.

[0093] It should be noted that, as Figure 3 As shown, the refrigerator body 50 contains a refrigerator liner 10 for storing and refrigerating items, and the top of the body 50 is fitted with an openable door 60, i.e., a valve structure 40 is installed on the door 60. A foam layer 80 is provided between the refrigerator liner 10 and the body 50, and the evaporator heat transfer pipe 90 is designed as a coiled pipe structure, which is coiled around the outer circumference of the refrigerator liner 10 within the foam layer 80. At least one storage shelf is provided inside the refrigerator liner 10 above the water collection structure 20. The shelf has a perforated design to allow defrost water to flow down into the water collection structure 20, thus preventing the items on the shelf from being soaked by defrost water.

[0094] Therefore, this utility model collects temperature and humidity data through a temperature detection device 101 and a humidity detection device 102 to collaboratively determine whether defrost water has formed. Once defrost water forms, the controller triggers the heating structure 30 to start, thereby promptly heating and evaporating the defrost water in the water collection structure 20 to form water vapor. Then, through the combined design of a "pressure detection device + differential pressure ΔL control valve structure 40", the water vapor is discharged to the outside through the valve structure 40, thereby promptly discharging the defrost water in the refrigerator liner 10 to the outside, realizing the automatic treatment and discharge of defrost water. This solves the problem of defrost water accumulation and bacterial growth after a power outage in a vehicle refrigerator. It features a simple structure, controllable cost, strong practicality, and easy integration into existing vehicle refrigerator systems, achieving automatic, intelligent, and low-energy-consumption defrost water treatment, and has good market application prospects.

[0095] Among them, such as Figure 7 As shown in the figure, this embodiment also presents a logic diagram for the automatic handling and discharge of defrost water in a vehicle-mounted refrigerator:

[0096] S1: When the vehicle refrigerator is in normal cooling mode, after the timer in the controller meets the temperature acquisition cycle t1, the temperature detection device 101 will collect the temperature T1 inside the refrigerator liner 10 in real time.

[0097] S2: The controller determines whether the temperature T1 is less than or equal to the first set temperature threshold Ta;

[0098] If the temperature T1 is greater than the first set temperature threshold Ta, then the timer is reset to zero and the process returns to step S1.

[0099] If the temperature T1 is less than or equal to the first set temperature threshold Ta, the vehicle refrigerator enters the heat preservation mode. At this time, the compressor 70 stops running to maintain the existing temperature inside the refrigerator liner 10.

[0100] S3: Determine if the car refrigerator is powered off;

[0101] If the vehicle refrigerator loses power, it switches to defrost water treatment mode and the timer starts counting the power outage duration t3.

[0102] If the vehicle refrigerator is not powered off, and the timer meets the insulation timing period t2, the refrigerator liner 10 is under negative pressure, i.e., △L=L1-L2<set pressure difference threshold △Ls, and the valve structure 40 or valve core 403 remains closed; there is no obvious defrost water in the water collection structure 20, and no treatment is required.

[0103] S4: Determine whether the power outage duration t3 is greater than or equal to the first set power outage time threshold t3h;

[0104] If the power outage duration t3 is greater than or equal to the first set power outage time threshold t3h, the controller will execute the defrost water immediate processing mode and enter step S5.

[0105] If the power outage duration t3 < the first set power outage time threshold t3h, the controller executes the defrosting water delay processing mode, and then determines whether the power outage duration t3 satisfies the condition that the second set power outage time threshold t3h' ≤ power outage duration t3 < the first set power outage time threshold t3h.

[0106] If this condition is met, proceed to step S5;

[0107] If this condition is not met, proceed to step S3.

[0108] S5: Temperature detection device 101 collects the temperature T2 inside the refrigerator liner 10 in real time after power failure, and humidity detection device 102 collects the humidity Ts inside the refrigerator liner 10 in real time after power failure.

[0109] S6: Determine whether the temperature T2 is greater than or equal to the second set temperature threshold Tb, and whether the humidity Ts is greater than or equal to the set humidity threshold Tsh;

[0110] If temperature T2 < second set temperature threshold Tb, and humidity Ts < set humidity threshold Tsh, then proceed to step S4;

[0111] If temperature T2 ≥ second set temperature threshold Tb and humidity Ts ≥ set humidity threshold Tsh, it indicates that defrost water has begun to form inside the refrigerator liner 10 and accumulates in the water collection structure 20 below. At this time, the controller triggers the heating structure 30 to work, thereby heating the water collection structure 20 and causing the defrost water to evaporate and form water vapor.

[0112] S7: The first pressure detection device 103 collects the pressure L1 inside the refrigerator liner 10 in real time after the power is cut off, and the second pressure detection device 104 collects the atmospheric pressure L2 outside the refrigerator body 50 in real time after the power is cut off. Then the controller calculates the pressure difference ΔL=L1-L2.

[0113] S8: Determine whether the pressure difference ΔL is greater than or equal to the set pressure difference threshold ΔLs;

[0114] If the pressure difference ΔL < the set pressure difference threshold ΔLs, then proceed to step S6;

[0115] If the pressure difference ΔL ≥ the set pressure difference threshold ΔLs, then the controller will open the valve structure 40 or the valve core 403 to allow the water vapor in the refrigerator liner 10 to be automatically discharged outside the cabinet 50.

[0116] S9: Obtain the heating duration t4 of the heating structure 30, and determine whether the heating duration t4 is greater than the set heating time threshold t4h;

[0117] If the heating time t4 ≤ the set heating time threshold t4h, then proceed to step S6;

[0118] If the heating time t4 is greater than the set heating time threshold t4h, then it is determined whether the pressure difference ΔL is less than the safety threshold ΔLq.

[0119] If the pressure difference ΔL ≥ the safety threshold ΔLq, then proceed to step S6;

[0120] If the pressure difference ΔL < the safety threshold ΔLq, the controller will close the valve structure 40 or the valve core 403, indicating that the defrosting water in the refrigerator liner 10 has been completely evaporated and the water vapor formed by evaporation has been discharged to the outside in time.

[0121] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A defrosting and drainage device, characterized in that, include: The refrigerator liner (10) has a water collection structure (20) on its bottom wall. The water collection structure (20) is used to collect the defrosting water formed by the frost layer of the refrigerator liner (10). The refrigerator liner (10) is equipped with a heating structure (30) corresponding to the water collection structure (20). The heating structure (30) is used to heat the defrosting water in the water collection structure (20) to form water vapor. A valve structure (40) is sealed in the channel connecting the refrigerator liner (10) and the outside. The valve structure (40) is used to discharge water vapor inside the refrigerator liner (10) to the outside.

2. The defrosting and drainage device according to claim 1, characterized in that, The channel is located on the side wall or top of the refrigerator liner (10) above the water collection structure (20).

3. The defrosting and drainage device according to claim 1, characterized in that, The valve structure (40) includes a first valve body (401), a first hollow shaft core (402) is provided inside the first valve body (401), and at least one valve core (403) is matched and provided inside the first hollow shaft core (402); the two ends of the first hollow shaft core (402) are respectively connected to the refrigerator liner (10) and the outside atmosphere.

4. The defrosting and drainage device according to claim 3, characterized in that, The first valve body (401) is provided with a first insulation layer (404) around the first hollow shaft core (402), and the first insulation layer (404) is used to prevent the cold air inside the refrigerator liner (10) from escaping.

5. The defrosting and drainage device according to claim 4, characterized in that, The first hollow shaft core (402) also integrates a micro fan (405), which is used to accelerate the gas flow in the first hollow shaft core (402).

6. The defrosting and drainage device according to claim 1, characterized in that, The refrigerator liner (10) is also equipped with a temperature detection device (101) and a humidity detection device (102). The temperature detection device (101) and the humidity detection device (102) are both electrically connected to the controller. The controller is used to start and stop the heating structure (30) or the compressor (70) according to the detection data of the temperature detection device (101) and the humidity detection device (102).

7. The defrosting and drainage device according to claim 1, characterized in that, A first pressure detection device (103) is provided inside the refrigerator liner (10) for detecting the pressure inside the refrigerator liner (10); A second pressure detection device (104) is provided outside the refrigerator liner (10) for detecting the external atmospheric pressure; Both the first pressure detection device (103) and the second pressure detection device (104) are electrically connected to the controller. The controller is used to calculate the pressure difference between the first pressure detection device (103) and the second pressure detection device (104) in real time and dynamically monitor the air pressure changes inside the refrigerator liner (10).

8. The defrosting and drainage device according to claim 1, characterized in that, The valve structure (40) includes a second valve body (406), and a second hollow shaft core (407) is provided inside the second valve body (406). The two ends of the second hollow shaft core (407) are respectively connected to the refrigerator liner (10) and the outside atmosphere. At least one elastic valve core (408) is matched and provided inside the second hollow shaft core (407). The elastic valve core (408) is used to automatically seal when there is no airflow impact and open under the action of airflow pressure to discharge the water vapor in the refrigerator liner (10) to the outside.

9. The defrosting and drainage device according to claim 8, characterized in that, The second valve body (406) is provided with a second insulation layer (409) around the second hollow shaft core (407), and the second insulation layer (409) is used to prevent the cold air inside the refrigerator liner (10) from escaping.

10. A vehicle-mounted refrigerator, characterized in that, The vehicle-mounted refrigerator includes the defrosting and drainage device as described in any one of claims 1 to 9.

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