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恒温恒湿设备恒温箱气体与湿热互换基本原理

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恒温恒湿设备恒温箱气体与湿热互换基本原理

时间:2019-09-29 文章来源:威尼斯城官网--http://www.fendermendersfredonia.com 作者:创日新仪器 浏览次数:

vnsc威尼斯城官方网站压缩机是制冷系统心脏,它吸入低温低压气体,变成高温高压气体,通过冷凝成液体放出热量,通过风机带走热量,所以vnsc威尼斯城官方网站下面是热风原因,然后通过节流到为低压液体,其次通过蒸发器成为低温低压气体最后回到压缩机;制冷剂在蒸发器中吸收热量完成气化过程重而吸收热量,达到制冷目的,完成vnsc威尼斯城官方网站降温过程。

The compressor of constant temperature and humidity incubator is the heart of refrigeration system. It inhales low temperature and low pressure gas and becomes high temperature and high pressure gas. It releases heat through condensation into liquid and takes heat away through fan. Therefore, under the incubator of constant temperature and humidity incubator is the cause of hot air. Then it throttles to low pressure liquid, and then becomes low temperature through evaporator. The low pressure gas finally returns to the compressor; the refrigerant absorbs heat in the evaporator to complete the gasification process and absorbs heat, so as to achieve the purpose of refrigeration and complete the cooling process of the incubator with constant temperature and humidity.

在恒温恒湿设备恒温箱超低温高低温状况下,因为添加的蒸气与气体未充足混和,或与箱壁触碰而出現部分冷疑,则不但使添加的蒸气量少,并且还释放发热量使箱里潮湿空气溫度升高;加上前述的ε′>ε,所以并非等温的加湿过程,箱内温度会有所升高。蒸汽加湿如用电热加湿,分开启式和密闭式。开式响应性较慢,常有滞后现象,故湿度波动较大,但结构简单可靠。关闭式蒸气工作压力超过大气压力,在0.1~0.3MPa中间,无落后,但需装有调压阀、继电器、排水管等,构造繁琐,多用以大中型人工气候室中。开式多用于中小型vnsc威尼斯城官方网站中。四达试验仪器厂过去生产的vnsc威尼斯城官方网站用的是开式电加热蒸汽加湿。

Under the condition of ultra-low temperature and high temperature of constant temperature and humidity equipment constant temperature box, because the added vapor and gas are not sufficiently mixed or touch with the wall of the box, some cold suspicion appears, which not only reduces the amount of added vapor, but also releases heat to raise the temperature of humid air in the box; with the above-mentioned epsilon'> epsilon, it is not isothermal heating. During the wet process, the temperature in the box will rise. Steam humidification, such as electrothermal humidification, separated open and closed. Open-type response is slow, often lagging phenomenon, so the humidity fluctuation is large, but the structure is simple and reliable. The working pressure of closed steam exceeds atmospheric pressure, which is between 0.1 MPa and 0.3 MPa. There is no lagging behind, but it needs to be equipped with pressure regulating valves, relays, drainage pipes and so on. The structure is tedious and most of them are used in large and medium-sized artificial climate chambers.  Open multi-purpose for medium and small constant temperature and humidity incubator. In the past, the constant temperature and humidity incubator manufactured by Sida Experimental Instrument Factory used open electric heating steam humidification.

恒温恒湿设备恒温箱气体与河面立即触碰时,在接近河面上,因为氧分子作不规律健身运动的結果,产生了1个溫度相当于河面溫度的饱和状态气体边界层,且其水蒸气分子结构的浓度值或水蒸气分工作压力在于边界层的饱和状态气体溫度。当空气经过敞开的水面时,与水表面发生热湿交换。按其水温不同,可能仅发生显热交换;也可能既有显热交换,又能湿交换,同时还有潜热交换。显热交换是空气与水之间存在温差,因导热、对流和辐射作用而换热,而潜热交换是空气中的水蒸汽蒸发而吸收汽化潜热的结果。总热交换量为显热交换量与潜热交换量的代数和。

When the gas in the thermostat of constant temperature and humidity equipment touches the river surface immediately, when it approaches the river surface, a saturated gas boundary layer corresponding to the temperature of the river surface is produced as a result of irregular exercise of oxygen molecules. The concentration value of the molecular structure of water vapor or the working pressure of water vapor are in the saturated state of the boundary layer. Temperature of gaseous state. When air passes through open water surface, it exchanges heat and moisture with water surface. According to the water temperature, there may be only sensible heat exchange, sensible heat exchange, wet heat exchange and latent heat exchange. Sensible heat exchange is the difference of temperature between air and water, which is heat exchanged by conduction, convection and radiation. Latent heat exchange is the result of vaporization latent heat absorbed by vapor evaporation in air. The total heat exchange is the algebraic sum of sensible heat exchange and latent heat exchange.

如边界层的溫度高过其上气体的溫度,则由边界层向气体热传导;相反则由气体向边界层热传导。如边界层内水蒸气分子结构浓度值超过其上气体的水蒸气分子结构浓度值,则气体中的水蒸气分子结构数将提升;反之则将减少。前者称为“蒸发",后者称为“冷凝"。在蒸发过程中,边界层中减少了的水汽分子由水面跃出的水分子补充;在冷凝过程中,边界层中过多的水汽分子将回到水面。由此可见,空气与水之间的显热交换取决于边界层与其上方空气之间的温差,而湿交换及由此而引起的潜热交换取决于二者之间水蒸汽分子的浓度差或分压力差。湿基本原理根据电加热器水,使不锈钢水槽内造成蒸气,蒸气根据喷雾器管进到恒温恒湿设备恒温箱,对箱里气体开展增湿器。从蒸汽锅炉内出来的高于大气压的蒸汽进行减压后喷入vnsc威尼斯城官方网站中进行加湿。

If the temperature of the boundary layer is higher than that of the gas above it, the heat conduction from the boundary layer to the gas is carried out; on the contrary, the heat conduction from the gas to the boundary layer is carried out. If the molecular structure concentration of water vapor in the boundary layer exceeds the molecular structure concentration of water vapor in the gas above, the number of molecular structure of water vapor in the gas will increase; otherwise, it will decrease. The former is called "evaporation" and the latter is called "condensation". In the evaporation process, the reduced water vapor molecules in the boundary layer are supplemented by the water molecules leaping from the water surface; in the condensation process, excessive water vapor molecules in the boundary layer will return to the water surface. Thus, the sensible heat exchange between air and water depends on the temperature difference between the boundary layer and the air above it, while the moisture exchange and the latent heat exchange caused by it depend on the concentration difference or partial pressure difference of water vapor molecules between them. The wet principle is based on the electric heater water, which causes vapor in the stainless steel water tank. The steam enters the constant temperature and humidity equipment thermostat according to the spray tube, and carries out the humidifier for the gas in the box. The steam from the steam boiler which is higher than atmospheric pressure is decompressed and injected into the incubator of constant temperature and humidity for humidification.

恒温恒湿设备恒温箱中气旋根据箱里的浅水盘表层,此溫度相当于河面溫度的饱和状态气体界限区开展寒湿互换。当界限居民区蒸气分子结构浓度值超过穿过的气旋的水蒸气分子结构浓度值,则为增湿器,相反则为降湿。

The cyclone in the thermostat is exchanged between cold and humidity according to the surface layer of the shallow water plate in the thermostat, which corresponds to the saturated gas boundary area of the river surface temperature. When the molecule structure concentration of vapor in the boundary residential area exceeds the molecule structure concentration of water vapor passing through the cyclone, it is humidifier, on the contrary, it is dehumidifier.

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