Method and device for maintaining constant temperature

Specific embodiment one

[0037] This embodiment discloses a more preferred embodiment of the method for maintaining a constant temperature, including the steps:

[0038] S10: Keep the dry ice in a thermos;

[0039] S20: Detect the external ambient temperature of the insulation barrel;

[0040] S30: When the external environment temperature of the insulation barrel exceeds the preset temperature range, the insulation barrel is opened, and the low-temperature carbon dioxide gas obtained by sublimation of the dry ice in the insulation barrel is transported to a heat collection structure, and the low temperature carbon dioxide gas is absorbed by the heat collection structure Heat in the external environment;

[0041] S40: After the preset time after opening the insulation barrel, detect the external ambient temperature of the insulation barrel again;

[0042] S50: When the external environment temperature of the insulation barrel is still beyond the preset temperature range, open the quick exhaust port connecting the insulation barrel with the external environment, and the low-temperature carbon dioxide gas obtained by sublimation of the dry ice in the insulation barrel is directly discharged to the outside through the quick exhaust port In the environment, the direct emission here means that the low-temperature carbon dioxide gas in the insulation barrel does not pass through the heat collection structure, but is directly discharged from the insulation barrel to its external environment;

[0043] S60: Detect the air pressure in the insulation barrel, and when it is detected that the air pressure in the insulation barrel is greater than the first preset air pressure range, open the gas discharge port of the insulation barrel to discharge the gas in the insulation barrel into the atmosphere;

[0044] S70: Detect the air pressure in the insulation barrel, and when it is detected that the air pressure in the insulation barrel is less than the second preset air pressure range, inject outside air into the insulation barrel until the air pressure in the insulation barrel reaches the second preset air pressure range.

[0045] It should be noted that, in this application, the external environment of the insulation barrel refers to the ambient temperature to be adjusted by this method, and the temperature of the environment in which the atmosphere is located is not the temperature that needs to be adjusted by this method. For example, if the insulation barrel is placed in a box, the external environment of the insulation barrel refers to the environment inside and outside the insulation barrel, and the atmospheric environment refers to the external environment of the box.

[0046] The invention inputs the low-temperature carbon dioxide in the heat preservation barrel into the heat collection structure, so that the low-temperature carbon dioxide exchanges heat with the external environment through the heat collection structure. This arrangement can realize the temperature adjustment of the external environment within a certain range, and the heat collection structure can achieve Buffering effect. Through step S50, the temperature in the external environment can be quickly reduced, thereby improving the regulation efficiency. Through step S60, the danger caused by excessive air pressure in the insulation barrel can be avoided, and the gas in the insulation barrel can be discharged into the atmosphere instead of being discharged to the external environment. It can effectively prevent the temperature of the external environment from falling below the preset temperature range, and step S70 can prevent the low-temperature carbon dioxide gas from being discharged due to the low air pressure in the insulating barrel.

[0047] The method of maintaining a constant temperature in this embodiment has simple steps and is easy to operate. The amount of dry ice released can be controlled by controlling the connection relationship between the dry ice bucket and the heat collection structure and the external environment, so that the external environment outside the dry ice bucket can be maintained at a preset value. Within the temperature range, the method can effectively prolong the release of dry ice and realize constant temperature control under low energy consumption.

Specific embodiment two

[0048] The second embodiment discloses another embodiment of the method of maintaining a constant temperature. The steps are basically the same as those in the first embodiment, except that the low-temperature carbon dioxide gas obtained by sublimation of dry ice in the heat preservation barrel in step S50 The discharge method is different. In step S50 of this embodiment, the low-temperature carbon dioxide gas obtained by the absorption and sublimation of the dry ice in the insulation barrel first passes through the heat collection structure, and then is discharged into the external environment through the quick discharge port, that is to say In this embodiment, the quick exhaust port is connected to the insulation barrel through the heat collection structure. Of course, the quick exhaust port can also be regarded as an exhaust port of the heat collection structure.

Specific embodiment three

[0049] The third embodiment discloses another embodiment of the method for maintaining a constant temperature. The steps are basically the same as those of the first embodiment. The only difference is that the method for maintaining a constant temperature in this embodiment further includes steps before step S30: S80: When the external environment temperature exceeds the preset temperature range and the exceeded temperature value is greater than the preset exceeded range, open the insulation barrel, and the low-temperature carbon dioxide gas obtained by sublimation of the dry ice in the insulation barrel is directly discharged into the external environment of the insulation barrel. That is to say, when it is detected that the external environment temperature is too high, the low-temperature carbon dioxide gas does not absorb external heat through the heat collection structure, but is directly discharged into the external environment to absorb heat, thereby achieving rapid cooling of the external environment. The method for maintaining a constant temperature in this embodiment further includes step S90: when the external environment temperature exceeds the preset temperature range and the exceeded temperature value is less than the preset exceeded range, step S30 is executed. That is to say, when the external environment temperature is higher than the preset temperature range, but not too high, the low-temperature carbon dioxide gas in the insulation barrel is input to the heat collection structure, and the heat collection structure exchanges heat with the external environment. That is to say, only a small range of temperature adjustment is performed at the heat collection structure, so that the temperature control effect is better when setting, and the temperature adjustment efficiency is high.