Multifunctional safe constant temperature device

Abstract

The utility model discloses a multifunctional safe constant temperature device which comprises a lower body and an upper cover which are connected with each other, the upper cover adopts a yin-yang cover with refrigeration, heating and heat preservation functions, and the upper cover is composed of a lower cover and an upper cover which are connected with each other and can rotate relative to each other. Switching between a refrigeration mode and a heat preservation mode or between a heating mode and a heat preservation mode is achieved through rotation. The utility model can solve the problems that in the prior art, no heating function exists in a low-temperature environment, the cooling speed is low in a high-temperature environment, the utilization rate of space in a cup is low, two modes of covers need to be carried when people go out, the two types of covers need to be replaced under the two conditions of electric refrigeration and non-electric heat preservation, the temperature is too high after power failure, and the use cost is high. Therefore, medicine, food and the like lose efficacy and go bad and are not easy to find, and potential safety hazards of misuse exist, and the refrigerator is suitable for cold storage or constant-temperature storage and transportation of medicine, food, beverage and the like.

Description

Technical Field

[0001] This utility model relates to the fields of medicine and daily life technology for the constant temperature storage or transportation of solids and liquids, and more specifically, to a multifunctional safety constant temperature device that can be used as a multifunctional safety constant temperature bottle, safety constant temperature kettle, multifunctional safety constant temperature box, vehicle refrigerator or freezer, etc. Background Technology

[0002] Currently, portable coolers have good cooling capabilities, but their insulation is generally poor. They typically reach the same temperature as the outside environment within tens of minutes after a power outage. Therefore, these products cannot be used reliably during power outages. Furthermore, the open-door design for retrieving items results in significant energy loss. Another type is the thermos cup, which offers good insulation but lacks cooling functionality. Additionally, the existing "Secret Box," while claiming to combine cooling and insulation, is actually two separate devices: one for insulation and one for cooling. It lacks a heating function, and both devices share a single thermos cup body, demonstrating a lack of integration. The device requires replacing the lid in both electric cooling and non-electric heat preservation modes, necessitating the carrying of both sets of equipment when traveling. Furthermore, the cooling lid is connected to a long metal cylinder, occupying a significant amount of usable space inside the cup. When the ambient temperature is higher than the desired temperature, heat transfer is relatively slow, and the entire metal cylinder must be removed to retrieve items, wasting the cooling energy. Lacking a heating function, it cannot guarantee that medicines or other items inside will not freeze when the ambient temperature is lower than the desired temperature, or meet customer needs for heating, such as hot water. Additionally, the internal temperature is unknown during heat preservation, and over time, the temperature may exceed the permissible range for medicines, causing them to become ineffective and potentially leading to accidental ingestion and harm. In summary, existing portable coolers and thermos cups have functional deficiencies. Although the Secret Box has both cooling and heat preservation functions, it lacks a heating function, is inconvenient to carry when going out, has difficulty switching between the two modes, has low utilization of the effective space inside the cup, has a relatively slow heat transfer speed inside the cup, consumes a lot of energy when taking out items, and has the safety hazard of medicines being damaged without being detected. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a multi-functional safety constant temperature device that integrates cooling, heating, heat preservation, and over-temperature alarm. This device solves the technical problems of the existing technology, such as slow cooling speed, low utilization of internal space, lack of heating function in low-temperature environments, the need to carry two types of lids for different conditions when going out, the need to replace the two types of lids under cooling and heat preservation conditions, and the risk of the device becoming too hot or too cold after power failure, which may cause medicines, food, etc. to become ineffective or spoiled without being easily detected, and pose a safety hazard of misuse.

[0004] The objective of this utility model is achieved through the following technical solution.

[0005] This utility model is a multifunctional safety constant temperature device, which includes a lower body and an upper cover that are connected to each other. The upper cover is a yin-yang cover that has the functions of cooling, heating and heat preservation. It is composed of a lower cover and an upper cover that are connected to each other and can rotate relative to each other. The two modes of cooling and heat preservation or heating and heat preservation can be switched by the relative rotation between the upper cover and the lower cover.

[0006] Furthermore, the lower cover includes a lower cover shell connected to the lower body. The bottom of the lower cover shell is inlaid with a heat transfer metal block, a heat insulation ring, and a central connector in sequence from the outside to the inside. A heat insulation fan ring is inlaid at the top of the heat transfer metal block, forming a yin-yang surface at the top of the lower cover where the end face of the heat transfer metal block and the first heat insulation fan ring alternate on the plane.

[0007] Furthermore, the upper cover includes an upper cover shell, and the bottom of the upper cover shell is provided with an upper cover bottom yin-yang surface that is in close contact with the yin-yang surface of the lower cover top and has the same structure. The upper cover bottom yin-yang surface is composed of Peltier elements and second heat insulation fan rings arranged alternately, and each Peltier element is provided with a metal heat exchange fin at its top.

[0008] Furthermore, by rotating the upper cover, the bottom yin-yang surfaces of the upper cover and the top yin-yang surfaces of the lower cover are rotated relative to each other, thereby achieving the switching between cooling and heat preservation modes or heating and heat preservation modes. Specifically, the upper end face of the heat transfer metal block is in contact with the lower end face of the Peltier element, and the upper end face of the first heat insulation fan ring is covered and connected with the lower end face of the second heat insulation fan ring. At this time, if the lower end face of the Peltier element is cooling and the upper end face is heating, it is the cooling mode; if the lower end face of the Peltier element is heating and the upper end face is cooling, it is the heating mode. The upper end face of the heat transfer metal block is in contact with the lower end face of the second heat insulation fan ring, and the upper end face of the first heat insulation fan ring is covered and connected with the lower end face of the Peltier element, which is the heat preservation mode.

[0009] Furthermore, the upper port of the lower body is provided with a No. 1 thread for connection with the lower cover, the outer shell of the lower cover is provided with a No. 2 thread matching the No. 1 thread, and the inner shell of the lower cover is provided with a sealing ring corresponding to the upper port of the lower body; the lower body includes a body shell, an intermediate layer, and an inner liner arranged sequentially from the outside to the inside, the intermediate layer of the lower body is at least one layer, the sealed space between the body shell and the intermediate layer is a vacuum insulation layer, the inner liner is detachable, or the inner liner and the intermediate layer form a heat pipe.

[0010] Furthermore, when the inner liner is detachable, the upper sidewall of the inner liner is provided with a through hole, and the lower sidewall of the inner liner is provided with a through hole or the bottom is provided with a through hole, or there is no cup bottom at the lower end; when the inner liner and the intermediate layer form a heat pipe, the sealed space between the inner liner and the intermediate layer is set as a low-pressure layer filled with a flowing medium, and the outer wall of the inner liner is provided with a number of V-shaped grooves with a radial cross section of V along the circumferential direction; when the inner liner and the intermediate layer form a heat pipe, the top of the intermediate layer and the inner liner are connected by a heat transfer metal sheet, and the heat transfer metal sheet is provided with a metal plane that contacts the heat transfer metal block.

[0011] Furthermore, the outer side of the upper end of the lower cover shell is provided with a limiting groove for rotation, and the inside of the upper cover shell is provided with a buckle for corresponding and matching the limiting groove. The number of buckles on the upper cover shell is the same as the number of limiting grooves on the lower cover shell, and they correspond one-to-one.

[0012] Furthermore, a reset spring plate is provided at the top inner end of the upper cover shell, and a spring connector is connected between the reset spring plate and the top inner end of the upper cover shell. The bottom of the reset spring plate is fixedly connected to the top of the lower cover shell, the top of the reset spring plate is connected to the lower part of the spring connector, and the upper part of the spring connector is connected to the center of the top inner end of the upper cover shell. The relative rotation between the upper cover shell and the reset spring plate is realized through the spring connector. The upper cover shell is provided with ventilation holes.

[0013] Furthermore, the first heat-insulating fan ring is configured as a fan ring and is evenly embedded at the top of the heat transfer metal block at equal intervals; the Peltier element and the second heat-insulating fan ring are both configured as fan rings, are evenly spaced and alternately arranged, and are both located outside the heat-insulating ring; the number and size of the second heat-insulating fan ring are the same as the first heat-insulating fan ring, and the first heat-insulating fan ring and the upper surface of the heat transfer metal block form a lower cover top surface with a uniformly spaced alternating metal heat transfer area and non-metal heat insulation area, and the area of ​​the heat insulation area is larger than the area of ​​the heat transfer area.

[0014] Furthermore, a rechargeable battery is installed inside the upper cover shell. The rechargeable battery is electrically connected to a charging port, a digital thermometer, a buzzer, a Peltier element with a synchronous switch, and a miniature electric fan. The charging port is located on the upper cover shell, while the miniature electric fan and buzzer are both located inside the upper cover shell. The temperature display of the digital thermometer is located on the top of the upper cover shell, and the temperature probe of the digital thermometer is embedded in the bottom of the central connector. Two temperature control switches are embedded in the bottom of the heat insulation ring. The first temperature control switch is electrically connected between the rechargeable battery and the buzzer, and the second temperature control switch is connected at one end to the rechargeable battery and at the other end to the Peltier element and the miniature electric fan, respectively, to control the synchronous switching of the Peltier element and the miniature electric fan. A power positive and negative reversal switch and a manual switch are also provided on the outside of the upper cover. The power positive and negative reversal switch is electrically connected between the Peltier element and its corresponding temperature control switch, and the manual switch is electrically connected between the rechargeable battery and all electrical appliances.

[0015] Compared with the prior art, the beneficial effects of the technical solution of this utility model are:

[0016] This utility model consists of a multi-layered insulated lower body and a double-layered yin-yang cover integrating cooling, heating, insulation, and alarm functions. During use, by rotating the upper and lower yin-yang covers relative to each other, when the upper surface of the heat transfer metal block aligns with the lower surface of the Peltier element, and the first and second heat insulation fan rings overlap and align, the device is in cooling or heating mode. The current direction of the Peltier element can be changed by a power polarity switch, allowing for reverse cooling and heating operation on the upper and lower surfaces of the Peltier element. The upper and lower covers facilitate convenient switching between cooling and heating in this alignment mode. If the internal temperature of the device exceeds the set temperature range (e.g., 2~8℃), the current direction of the Peltier element is controlled by the power positive and negative reversing switch. When the lower end of the Peltier element is cooled and the upper end is heated, it is the cooling mode for cooling the inside of the device. If the internal temperature of the device is lower than the set temperature, the current direction of the Peltier element is changed by the power positive and negative reversing switch, so that the upper end is cooled and the lower end is heated, which is the heating mode for heating the inside of the device. When the internal temperature of the device rises or falls to the required set temperature range, the temperature control switch cuts off the power to the Peltier element and the miniature electric fan to stop them from working. By rotating the upper cover of the yin-yang cover, the upper end of the heat transfer metal block is connected to the lower end of the second heat insulation fan ring, and the upper end of the first heat insulation fan ring is connected to the lower end of the Peltier element. This mode blocks the heat transfer between the inside and outside of the device, which is the heat preservation mode, easily realizing multiple uses of one device.

[0017] The lower body of this invention adopts a heat pipe heat transfer method, and the male and female covers can also adopt a heat pipe heat transfer method depending on their geometric size. Therefore, the heat energy is transferred rapidly within the body. The lower body uses a heat pipe-like effect instead of a heat transfer metal cylinder, which greatly increases the effective space of the lower body.

[0018] This invention also includes a rechargeable battery, primarily to power the digital temperature display and the buzzer alarm, allowing users to monitor the temperature at any time. Furthermore, it features an automatic alarm function when the internal temperature is too high or too low, preventing the accidental ingestion or misuse of stored medicines or food that have become expired or spoiled. This invention is multi-functional, portable, and safe to use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the multifunctional safety constant temperature device of this utility model;

[0020] Figure 2 This is a cross-sectional view of the lower part of the main body of this utility model;

[0021] Figure 3 This is a partially enlarged schematic diagram of the outer wall of the lower part of the main body of this utility model;

[0022] Figure 4a This is a cross-sectional view of the yin-yang cover in the present invention in either cooling or heating mode;

[0023] Figure 4b This is a cross-sectional view of the yin-yang cover in the heat preservation mode of this utility model;

[0024] Figure 5 This is a bottom view of the lower cover of this utility model;

[0025] Figure 6 This is a top view of the lower cover of this utility model;

[0026] Figure 7 This is a bottom view of the upper cover in this utility model;

[0027] Figure 8 This is a front view of the yin-yang cover in this utility model;

[0028] Figure 9 This is a schematic diagram of the reset spring sheet in this utility model;

[0029] Among them, (a) is the top view and (b) is the side view.

[0030] Reference numerals: 1-Lower body, 2-Lower cover, 3-Upper cover; 101-Main body shell, 102-Middle layer, 103-Inner liner, 1031-V-shaped groove, 104-Heat transfer metal sheet, 105-Thread No. 1; 201-Lower cover shell, 202-Thread No. 2, 203-Sealing ring, 204-Heat transfer metal block, 205-Central connector, 206-Temperature probe, 207-Insulation ring, 208-Insulation fan ring No. 1, 209-Limiting slot, 210-Temperature control switch; 211-Power positive / negative pole conversion switch; 212-Manual switch; 301-Peltier element, 302-Metal heat exchange plate, 303 - Miniature electric fan, 304- Temperature display, 305- Rechargeable battery, 306- Buzzer, 307- Charging port, 308- Reset spring plate, 309- Ventilation hole, 310- Buckle, 311- Spring connector, 312- No. 2 heat insulation fan ring, 313- Upper cover shell. Detailed Implementation

[0031] The present invention will now be further described with reference to the accompanying drawings.

[0032] like Figure 1 As shown, this utility model is a multifunctional safety constant temperature device, including a lower body 1 and an upper cover connected to each other, which can be connected by threads. The upper cover is a two-layered male-female cover, integrating cooling, heating, temperature control, and heat preservation functions. When there is electricity, it can realize automatic cooling or heating temperature control. When the temperature inside the device meets the requirements, it can be manually switched to heat preservation mode. The different modes of cooling, heating, and heat preservation can be switched by rotation. The upper cover is composed of a lower cover 2 and an upper cover 3 that are connected to each other and can rotate relative to each other. The lower cover 2 and the upper cover 3 can be connected by a central connecting member 205 embedded in their center. The relative rotation between the upper cover 2 and the lower cover 3 realizes the switching between cooling and heat preservation modes or heating and heat preservation modes.

[0033] like Figure 2 As shown, the lower body 1 can be composed of three or more layers of stainless steel material, including a body shell 101, a middle layer 102, and an inner liner 103. The upper port of the lower body 1 is provided with a No. 1 thread 105 for connection with the lower cover 2. The body shell 101 can be painted with different colors or patterns for aesthetic purposes. The sealed space between the body shell 101 and the middle layer 102 is set as a vacuum insulation layer, mainly for heat preservation, the same purpose as conventional vacuum insulation; the lower body 1 has at least one middle layer 102, and when there is more than one, the sealed space between adjacent middle layers 102 is also set as a vacuum insulation layer.

[0034] In the aforementioned lower body 1, the inner liner 103 can take different forms depending on actual needs. For example, the inner liner 103 can be detachable, making it convenient to remove or install the inner liner 103 from the lower body 1; or the inner liner 103 and the intermediate layer 102 can form a heat pipe. When the inner liner 103 is detachable, a through hole can be provided on the upper side wall of the inner liner 103, and a through hole can be provided on the lower side wall or bottom of the inner liner 103, or there may be no bottom at the bottom. This can enhance air circulation and improve heat transfer. When the inner liner 103 and the intermediate layer 102 form a heat pipe, specifically, the sealed space between the inner liner 103 and the intermediate layer 102 is configured as a low-pressure layer (e.g., 0.005-0.01 atmospheres) filled with a small amount of a fluid medium (such as distilled water or alcohol) that can be easily vaporized and liquefied under normal temperature and low pressure conditions. This low-pressure layer has the function of rapid heat transfer in a heat pipe. The inner wall of the inner liner 103 is a smooth inner wall, and the outer wall of the inner liner 103 is uniformly etched with several V-shaped grooves 1031 along the circumferential direction. Figure 3 As shown, the radial cross-section of each V-shaped groove 1031 is V-shaped, and the axial length of each V-shaped groove 1031 is almost equal to the longitudinal height of the inner liner 103. This is to provide driving pressure (capillary force) for the liquefied flowing medium, which facilitates rapid circulation and heat transfer, enabling rapid temperature equilibrium within the lower body 1. When the inner liner 103 and the intermediate layer 102 form a heat pipe, the tops of the intermediate layer 102 and the inner liner 103 are connected to a heat-transferring metal sheet 104 with good thermal conductivity. The heat-transferring metal sheet 104 is designed to be appropriately wide and in contact with the metal plane at the bottom of the heat-transferring metal block 204, which increases the contact area between the heat-transferring metal block 204 and the low-pressure layer, facilitating rapid heat transfer.

[0035] like Figure 4a , Figure 4b , Figure 5 , Figure 6 As shown, the lower cover 2 includes a lower cover shell 201 connected to the lower body 1. The bottom of the lower cover shell 201 is sequentially embedded with a heat transfer metal block 204, a heat insulation ring 207, and a central connector 205 from the outside to the inside. A first heat insulation fan ring 208 is embedded at the top of the heat transfer metal block 204, forming a yin-yang surface at the top of the lower cover where the end face of the heat transfer metal block 204 and the first heat insulation fan ring 208 alternate on the plane.

[0036] In the aforementioned lower cover 2, the lower cover shell 201 may be made of rubber. The lower cover shell 201 is provided with a second thread 202 that connects to the lower body 1. The second thread 202 matches the first thread 105 of the lower body 1. The lower cover shell 201 is provided with a good elastic sealing ring 203 that contacts the upper port of the lower body 1 to ensure the sealing and heat preservation effect between the lower body 1 and the lower cover 2.

[0037] In the aforementioned lower cover 2, the outer side of the upper end of the lower cover shell 201 of the lower cover 2 may be provided with a limiting groove 209 for rotation. A heat transfer metal block 204 is embedded in the bottom of the lower cover shell 201. A central connecting piece 205 coaxial with the heat transfer metal block 204 is provided in the center of the heat transfer metal block 204. The heat transfer metal block 204 may be composed of heat-conducting metal sheets (such as copper, stainless steel, etc.). The top end may be provided with a first heat-insulating fan ring 208 (such as ceramic, rubber, etc.) that is semi-embedded and evenly distributed in multiple sets of identical fan rings. On the plane, the upper end surface of the heat transfer metal block 204 and the first heat-insulating fan ring 208 are alternately formed as the yin and yang surfaces of the lower cover. At least two, preferably three, heat insulation fan rings 208 are evenly spaced. The heat insulation fan rings 208 and the heat transfer metal block 204 form the yin-yang surface of the top of the lower cover with alternating metal heat transfer zone and non-metal heat insulation zone. To enhance the heat preservation effect, the area of ​​the heat insulation zone is larger than the area of ​​the heat transfer zone. That is, in the heat preservation mode, the heat insulation material should completely cover the heat transfer metal and leave room.

[0038] like Figure 7 As shown, the upper cover 3 includes an upper cover shell 313. The bottom of the upper cover shell 313 is provided with an upper cover bottom yin-yang surface that is in close contact with the yin-yang surface of the lower cover top inside the lower cover shell 201 and has the same structure. The upper cover bottom yin-yang surface is composed of Peltier elements 301 and second heat insulation fan rings 312 (such as ceramic, rubber, etc.) that are evenly and alternately arranged.

[0039] In the aforementioned upper cover 3, the number and size of the second heat-insulating fan ring 312 are the same as those of the first heat-insulating fan ring 208. Both the Peltier element 301 and the second heat-insulating fan ring 312 can be configured as fan-shaped rings, flush with the bottom of the upper cover 3. The Peltier element 301 and the second heat-insulating fan ring 312 are evenly spaced and interleaved along the outer circumference of the heat-insulating ring 207. Rotating the upper cover 3 allows for two modes: contact between the heat transfer metal block and the Peltier element, or docking between the heat transfer metal block and the heat-insulating fan ring. Each Peltier element 301 has a metal heat exchange fin 302 at its top to enhance heat diffusion. The heat transfer metal sections of the upper cover 3 and the lower cover 2 can also be manufactured in the form of heat pipes to ensure rapid heat transfer.

[0040] In the aforementioned upper cover 3, the outer shell 313 of the upper cover can be made of rubber. To limit the rotation angle, the inner shell 313 of the upper cover can be provided with buckles 310 that correspond to and match the limiting slots 209. The number of buckles 310 of the upper cover shell 313 can be the same as the number of limiting slots 209 of the lower cover shell 201 (two or more), corresponding one-to-one. The arc length of the limiting slot 209 corresponds to the rotation angle (such as 45° or 60°). The upper cover 3 and the lower cover 2 can rotate around the central connector 205 within the limiting range of the limiting slots 209, such as 45° or 60°. To facilitate viewing the mode, a scale mark indicating the mode, such as 45° or 60°, can also be set on the outer shell 313 of the upper cover. The relative rotation of the bottom yin-yang surface of the upper cover and the top yin-yang surface of the lower cover is achieved by rotating the upper cover 3 clockwise (or counterclockwise).

[0041] During use, the upper cover 3 and the lower cover 2 are rotated relative to each other, so that the upper surface of the heat transfer metal block 204 is completely aligned with the lower surface of the Peltier element 301, and the upper surface of the first heat insulation fan ring 208 is completely aligned with the lower surface of the second heat insulation fan ring 312, putting the device in either cooling or heating mode. The current direction of the Peltier element can be changed by the power positive / negative reversal switch 211, allowing the upper and lower surfaces of the Peltier element 301 to reverse between cooling and heating. In this alignment mode, the upper and lower covers can be easily switched between cooling and heating modes. If the internal temperature of the device is higher than the set temperature (e.g., higher than 8°C), the current direction of the Peltier element 301 is controlled by the power supply polarity switch 211, causing the lower end face (the end face in contact with the heat transfer metal block 204) of the Peltier element 301 to cool while the upper end face heats up; this is the cooling mode for cooling the internal temperature of the device. If the internal temperature of the device is lower than the set temperature, the current direction of the Peltier element 301 is changed by reversing the power supply polarity, causing the lower end face (the end face in contact with the heat transfer metal block 204) of the Peltier element 301 to heat up. The heating mode involves heating the device from the outside to the inside, while the cooling mode involves cooling the top surface. When the temperature inside the device reaches the desired set range, the temperature control switch 210 cuts off the power to the Peltier element 301 and the miniature electric fan 303, stopping their operation. By rotating the upper and lower covers relative to each other, the upper surface of the heat transfer metal block 204 aligns with the lower surface of the second heat insulation fan ring 312, and the upper surface of the first heat insulation fan ring 208 aligns with the lower surface of the Peltier element 301. This mode blocks heat transfer between the inside and outside of the device, serving as the insulation mode. This allows for convenient switching between cooling, heating, and insulation modes. In addition, when the device is in heating mode, the device can be inverted. At this time, the heating surface of the Peltier element 301 is located at the bottom of the lower body 1. Bottom heating is conducive to the convection of air inside the lower body 1, which is conducive to the efficient operation of the heat pipe (or the chimney that forms the interlayer) formed by the inner liner 103 and the middle layer 102, so as to achieve rapid heat transfer in the lower body 1 to achieve uniform overall temperature.

[0042] In the aforementioned upper cover 3, the outer shell 313 of the upper cover is provided with a plurality of ventilation holes 309 to facilitate heat dissipation, such as... Figure 8 As shown. A reset spring plate 308 may be provided at the top inner end of the upper cover shell 313, such as... Figure 9 As shown, a spring connector 311 can be connected between the reset spring plate 308 and the inner top of the upper cover shell 313. The bottom of the reset spring plate 308 is fixedly connected to the top of the lower cover shell 201, the top of the reset spring plate 308 is connected to the lower part of the spring connector 311, and the upper part of the spring connector 311 is connected to the inner top center of the upper cover shell 313. The relative rotation between the upper cover shell 313 and the reset spring plate 308 is achieved through the spring connector 311. For example, any rotating connector and a fixed connector can be set among the reset spring plate 308, the spring connector 311, and the upper cover shell 313. This allows the reset spring plate 308 to remain stationary while the upper cover shell 313 rotates, and the spring connector 311 can rotate with the upper cover shell 313 or remain stationary with the reset spring plate 308. The reset spring plate 308 can be configured in an octopus-like shape, with at least two lower spring claws. The lower spring claws of the reset spring plate 308 can be connected to the top of the lower cover shell 201 at equal intervals. Slightly pulling the upper cover 3 vertically outward and rotating it (e.g., 45° or 60°) will switch between cooling (or heating) and heat preservation modes. Without pulling vertically outward, the reset spring plate 308 will insert the buckle 310 of the upper cover 3 into the limiting groove 209 of the lower cover 2. At this time, rotation will normally open or tighten the upper cover.

[0043] In the aforementioned upper cover 3, a rechargeable battery 305 can be installed inside the outer shell 313 of the upper cover. The rechargeable battery 305 is electrically connected to a charging port 307, a digital thermometer, a buzzer 306, a Peltier element 301, and a miniature electric fan 303. This power supply ensures that it can provide digital power to the digital thermometer in all modes, and also provides alarm power to the buzzer 306 when the temperature exceeds the limit. A switch can also be added to provide or disconnect power for emergency cooling (heating) to ensure the safe use of refrigerated medicines and food. The charging port 307 is located on the outer shell 313 of the upper cover and is used to connect to an external power source. When an external power source is available, it can charge the rechargeable battery 305 and provide power to the electrical appliances inside the device. When no external power source is available, temperature monitoring and alarms are powered by the rechargeable battery 305. The miniature electric fan 303 is located inside the outer shell 313 of the upper cover and is used to accelerate the airflow above the metal heat exchange fins 302 covering the upper surface of the Peltier element 301, thereby improving the heat exchange speed. The miniature electric fan 303 operates under the same conditions as the Peltier element 301 and is completely synchronized with the switching of the Peltier element 301. The buzzer 306 is located inside the upper cover shell 313 and is used for over-temperature alarm. The temperature display 304 of the digital thermometer can be located on the exterior of the device or on the top of the upper cover shell 313 for easy observation. The temperature probe 206 of the digital thermometer is embedded in the middle of the bottom of the central connector 205 and can measure the temperature inside the lower body 1 at any time.

[0044] At least two temperature control switches 210 are embedded at the bottom of the heat insulation ring 207. The first temperature control switch 210 is electrically connected between the rechargeable battery 305 and the buzzer 306. When the temperature inside the device exceeds the set temperature (e.g., above 8°C or below 2°C), it automatically closes, and the buzzer 306 is powered on to sound an alarm, in order to prevent the medicine from being misused and causing harm due to failure or deterioration caused by exceeding the harsh storage temperature conditions. When the temperature inside the device is within the set temperature range (e.g., 2-8°C), the temperature control switch 210 automatically disconnects the power supply, and the buzzer 306 is de-energized and stops working. The second temperature control switch 210 is connected to the rechargeable battery 305 at one end and to the Peltier element 301 and the mini electric fan 303 at the other end, controlling the synchronous switching of the Peltier element 301 and the mini electric fan 303. When the internal temperature of the lower body 1 is within the set temperature range (e.g., 2~8℃), the temperature control switch 210 automatically cuts off the power, and the Peltier element 301 and the mini electric fan 303 stop working. Within this temperature range, it can also rotate to the heat preservation mode for energy saving. When the internal temperature of the lower body 1 exceeds the set temperature (e.g., higher than 8℃ or lower than 2℃), the temperature control switch 210 automatically closes, and the Peltier element 301 and the mini electric fan 303 are synchronously powered on and work, with the Peltier element 301 cooling or heating the lower body 1. To facilitate switching between cooling and heating, a power polarity interchange switch 211 (such as a double-pole double-throw switch) can be added to the surface of the upper cover. The power polarity interchange switch 211 is electrically connected between the Peltier element 301 and its corresponding temperature control switch 210, and is only used to control the current direction of the Peltier element 301 to realize the switching between cooling and heating modes.

[0045] In addition, to facilitate disconnecting all electrical appliances within the device from the rechargeable battery 305 when the device is not in use, a manual switch 212 can be added to the surface of the upper cover. The manual switch 212 is electrically connected between the rechargeable battery 305 and all electrical appliances (such as the digital thermometer, buzzer 306, Peltier element 301, mini electric fan 303, etc.), allowing the temperature display and buzzer to be manually turned off when not in use, avoiding disturbance and saving energy.

[0046] This invention features a double-layered yin-yang cover that integrates multiple modes of cooling, heating, and insulation. The upper cover also includes a digital temperature display and a safety alarm. Depending on whether the internal temperature is higher or lower than the desired set temperature, the direction of the current flowing through the Peltier element 301 is selected to control the cooling or heating mode of the lower end of the Peltier element 301, ensuring the internal temperature remains within the required range. The cooling (or heating) and insulation modes are switched by rotating the upper cover. It achieves rapid cooling or heating with precise temperature control when powered; when the set temperature is reached, the yin-yang cover can be rotated to maintain the temperature. It can be used for low-temperature (constant-temperature) storage of liquids and solids such as medicines, food, or beverages. The device has high space utilization, is easy to carry, and ensures the safety and reliability of stored items. The device has an ingenious structure and is flexible and convenient to use.

[0047] This utility model's multifunctional safety thermostatic device can be used as an insulated refrigerator, car refrigerator, or other small thermostatic storage equipment. When this utility model's multifunctional safety thermostatic device is used as an insulated refrigerator, the lower body 1 can serve as the cup body, the lower cover 2 can serve as the lower cup cover, the upper cover 3 can serve as the upper cup cover, the outer shell 101 of the body can serve as the outer shell of the cup body, the outer shell 201 of the lower cover can serve as the outer shell of the lower cup cover, and the outer shell 313 of the upper cover can serve as the outer shell of the upper cup cover.

[0048] Although the function and working process of this utility model have been described above in conjunction with the accompanying drawings, this utility model is not limited to the above description. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this utility model without departing from the spirit and scope of the claims, and all of these are within the protection scope of this utility model.

Claims

1. A multifunctional safety thermostatic device, comprising a lower body (1) and an upper cover connected to each other, characterized in that, The upper cover is a yin-yang cover with cooling, heating and heat preservation functions. It consists of a lower cover (2) and an upper cover (3) that are connected to each other and can rotate relative to each other. The switching between cooling and heat preservation mode or heating and heat preservation mode is achieved by the relative rotation between the lower cover (2) and the upper cover (3). The lower cover (2) includes a lower cover shell (201) connected to the lower body (1). The bottom of the lower cover shell (201) is inlaid with a heat transfer metal block (204), a heat insulation ring (207), and a central connector (205) from the outside to the inside. A heat insulation fan ring (208) is inlaid at the top of the heat transfer metal block (204), forming a yin-yang surface at the top of the lower cover where the upper surface of the heat transfer metal block (204) and the first heat insulation fan ring (208) alternate. The upper cover (3) includes an upper cover shell (313). The bottom of the upper cover shell (313) is provided with an upper cover bottom yin-yang surface that is in close contact with the yin-yang surface of the lower cover top and has the same structure. The upper cover bottom yin-yang surface is composed of Peltier elements (301) and second heat insulation fan rings (312) alternately arranged. Each Peltier element (301) is provided with a metal heat exchange plate (302) at its top.

2. The multifunctional safety constant temperature device according to claim 1, characterized in that, The relative rotation of the bottom yin-yang surface of the upper cover and the top yin-yang surface of the lower cover is achieved by rotation, thereby realizing the switching between cooling and heat preservation modes or heating and heat preservation modes. Among them, the upper end face of the heat transfer metal block (204) is connected to the lower end face of the Peltier element (301), and the first heat insulation fan ring (208) and the second heat insulation fan ring (312) are connected and covered. At this time, if the lower end face of the Peltier element (301) is cooling and the upper end face is heating, it is the cooling mode. If the lower end face of the Peltier element (301) is heating and the upper end face is cooling, it is the heating mode. The upper end face of the heat transfer metal block (204) is connected to the lower end face of the second heat insulation fan ring (312), and the upper end face of the first heat insulation fan ring (208) is connected and covered. It is the heat preservation mode.

3. The multifunctional safety constant temperature device according to claim 1, characterized in that, The upper port of the lower body (1) is provided with a first thread (105) for connection with the lower cover (2), and the lower cover shell (201) is provided with a second thread (202) that matches the first thread (105). The lower cover shell (201) is provided with a sealing ring (203) corresponding to the upper port of the lower body (1). The lower body (1) includes a body shell (101), an intermediate layer (102), and an inner liner (103) arranged sequentially from the outside to the inside. The intermediate layer (102) of the lower body (1) is at least one layer. The sealed space between the body shell (101) and the intermediate layer (102) is a vacuum insulation layer. The inner liner (103) is detachable, or the inner liner (103) and the intermediate layer (102) form a heat pipe.

4. The multifunctional safety constant temperature device according to claim 3, characterized in that, When the inner liner (103) is detachable, the upper side wall of the inner liner (103) is provided with a through hole, and the lower side wall of the inner liner (103) is provided with a through hole or the bottom is provided with a through hole or there is no cup bottom at the bottom; when the inner liner (103) and the intermediate layer (102) form a heat pipe, the sealed space between the inner liner (103) and the intermediate layer (102) is set as a low-pressure layer filled with a flowing medium, and the outer wall of the inner liner (103) is provided with a number of V-shaped grooves (1031) with a radial cross section of V along the circumferential direction; when the inner liner (103) and the intermediate layer (102) form a heat pipe, the top of the intermediate layer (102) and the inner liner (103) are connected by a heat transfer metal sheet (104), and the heat transfer metal sheet (104) is provided with a metal plane that contacts the heat transfer metal block (204).

5. The multifunctional safety constant temperature device according to claim 1, characterized in that, The lower cover shell (201) is provided with a limiting groove (209) for rotation on the outer side of its upper end. The upper cover shell (313) is provided with buckles (310) for matching the limiting groove (209) inside. The number of buckles (310) on the upper cover shell (313) is the same as the number of limiting grooves (209) on the lower cover shell (201), and they correspond one-to-one.

6. The multifunctional safety constant temperature device according to claim 1, characterized in that, A reset spring plate (308) is provided at the top inner end of the upper cover shell (313). A spring connector (311) is connected between the reset spring plate (308) and the top inner end of the upper cover shell (313). The bottom of the reset spring plate (308) is fixedly connected to the top of the lower cover shell (201). The top of the reset spring plate (308) is connected to the lower part of the spring connector (311). The upper part of the spring connector (311) is connected to the center of the top inner end of the upper cover shell (313). The relative rotation between the upper cover shell (313) and the reset spring plate (308) is realized through the spring connector (311). The upper cover shell (313) is provided with ventilation holes (309).

7. The multifunctional safety constant temperature device according to claim 1, characterized in that, The first heat insulation fan ring (208) is configured as a fan ring and is evenly embedded at the top of the heat transfer metal block (204) at equal intervals; the Peltier element (301) and the second heat insulation fan ring (312) are both configured as fan rings, are evenly spaced and alternately arranged, and are both located outside the heat insulation ring (207); the number and size of the second heat insulation fan ring (312) are the same as the first heat insulation fan ring (208), and the first heat insulation fan ring (208) and the upper surface of the heat transfer metal block (204) form a lower cover top yin-yang surface with uniformly spaced metal heat transfer area and non-metal heat insulation area, and the area of ​​the heat insulation area is larger than the area of ​​the heat transfer area.

8. The multifunctional safety constant temperature device according to claim 1, characterized in that, A rechargeable battery (305) is installed inside the upper cover shell (313). The rechargeable battery (305) is electrically connected to a charging port (307), a digital thermometer, a buzzer (306), a Peltier element (301) for a synchronous switch, and a miniature electric fan (303). The charging port (307) is located on the upper cover shell (313). The miniature electric fan (303) and the buzzer (306) are both located inside the upper cover shell (313). The temperature display (304) of the digital thermometer is located on the top of the upper cover shell (313). The temperature probe (206) of the digital thermometer is embedded in the bottom of the central connector (205). At least two temperature control switches are embedded in the bottom of the heat insulation ring (207). The first temperature control switch (210) is electrically connected between the rechargeable battery (305) and the buzzer (306). The second temperature control switch (210) is connected at one end to the rechargeable battery (305) and at the other end to the Peltier element (301) and the miniature electric fan (303) respectively, controlling the synchronous switching of the Peltier element (301) and the miniature electric fan (303). The upper cover is also provided with a power positive and negative pole interchange switch (211) and a manual switch (212). The power positive and negative pole interchange switch (211) is electrically connected between the Peltier element (301) and its corresponding temperature control switch (210). The manual switch (212) is electrically connected between the rechargeable battery (305) and all electrical appliances.

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