恒溫恒濕培養(yǎng)箱壓縮機(jī)是制冷系統(tǒng)心臟，它吸入低溫低壓氣體，變成高溫高壓氣體，通過冷凝成液體放出熱量，通過風(fēng)機(jī)帶走熱量，所以恒溫恒濕培養(yǎng)箱下面是熱風(fēng)原因，然后通過節(jié)流到為低壓液體，其次通過蒸發(fā)器成為低溫低壓氣體最后回到壓縮機(jī)；制冷劑在蒸發(fā)器中吸收熱量完成氣化過程重而吸收熱量，達(dá)到制冷目的，完成恒溫恒濕培養(yǎng)箱降溫過程。

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.

在恒溫恒濕設(shè)備恒溫箱超低溫高低溫狀況下，因?yàn)樘砑拥恼魵馀c氣體未充足混和，或與箱壁觸碰而出現(xiàn)部分冷疑，則不但使添加的蒸氣量少，并且還釋放發(fā)熱量使箱里潮濕空氣溫度升高；加上前述的ε′＞ε，所以并非等溫的加濕過程，箱內(nèi)溫度會有所升高。蒸汽加濕如用電熱加濕，分開啟式和密閉式。開式響應(yīng)性較慢，常有滯后現(xiàn)象，故濕度波動較大，但結(jié)構(gòu)簡單可靠。關(guān)閉式蒸氣工作壓力超過大氣壓力，在0.1～0.3MPa中間，無落后，但需裝有調(diào)壓閥、繼電器、排水管等，構(gòu)造繁瑣，多用以大中型人工氣候室中。開式多用于中小型恒溫恒濕培養(yǎng)箱中。四達(dá)試驗(yàn)儀器廠過去生產(chǎn)的恒溫恒濕培養(yǎng)箱用的是開式電加熱蒸汽加濕。

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.

恒溫恒濕設(shè)備恒溫箱氣體與河面立即觸碰時，在接近河面上，因?yàn)檠醴肿幼鞑灰?guī)律健身運(yùn)動的結(jié)果，產(chǎn)生了1個溫度相當(dāng)于河面溫度的飽和狀態(tài)氣體邊界層，且其水蒸氣分子結(jié)構(gòu)的濃度值或水蒸氣分工作壓力在于邊界層的飽和狀態(tài)氣體溫度。當(dāng)空氣經(jīng)過敞開的水面時，與水表面發(fā)生熱濕交換。按其水溫不同，可能僅發(fā)生顯熱交換；也可能既有顯熱交換，又能濕交換，同時還有潛熱交換。顯熱交換是空氣與水之間存在溫差，因?qū)?、對流和輻射作用而換熱，而潛熱交換是空氣中的水蒸汽蒸發(fā)而吸收汽化潛熱的結(jié)果?？偀峤粨Q量為顯熱交換量與潛熱交換量的代數(shù)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.

如邊界層的溫度高過其上氣體的溫度，則由邊界層向氣體熱傳導(dǎo)；相反則由氣體向邊界層熱傳導(dǎo)。如邊界層內(nèi)水蒸氣分子結(jié)構(gòu)濃度值超過其上氣體的水蒸氣分子結(jié)構(gòu)濃度值，則氣體中的水蒸氣分子結(jié)構(gòu)數(shù)將提升；反之則將減少。前者稱為“蒸發(fā)"，后者稱為“冷凝"。在蒸發(fā)過程中，邊界層中減少了的水汽分子由水面躍出的水分子補(bǔ)充；在冷凝過程中，邊界層中過多的水汽分子將回到水面。由此可見，空氣與水之間的顯熱交換取決于邊界層與其上方空氣之間的溫差，而濕交換及由此而引起的潛熱交換取決于二者之間水蒸汽分子的濃度差或分壓力差。濕基本原理根據(jù)電加熱器水，使不銹鋼水槽內(nèi)造成蒸氣，蒸氣根據(jù)噴霧器管進(jìn)到恒溫恒濕設(shè)備恒溫箱，對箱里氣體開展增濕器。從蒸汽鍋爐內(nèi)出來的高于大氣壓的蒸汽進(jìn)行減壓后噴入恒溫恒濕培養(yǎng)箱中進(jìn)行加濕。

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.

恒溫恒濕設(shè)備恒溫箱中氣旋根據(jù)箱里的淺水盤表層，此溫度相當(dāng)于河面溫度的飽和狀態(tài)氣體界限區(qū)開展寒濕互換。當(dāng)界限居民區(qū)蒸氣分子結(jié)構(gòu)濃度值超過穿過的氣旋的水蒸氣分子結(jié)構(gòu)濃度值，則為增濕器，相反則為降濕。

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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