Moisture holding ca pacity apparatus of coal

The utility model discloses moisture holding ca pacity apparatus of coal, including heat preservation warehouse, be equipped with the constant temperature ageing bin in the heat preservation warehouse, the external confined water pipe of heat preservation warehouse, water piping connection water pump and switch, through adjusting water pump and switch, water gets into the heat preservation warehouse inner loop and flows to submergence constant temperature ageing bin, constant temperature ageing bin underfill potassium sulphide saturated solution, the inside sample frame that is provided with of constant temperature ageing bin, when surveing when experimental, heat preservation warehouse all seals with the constant temperature ageing bin. During the constant temperature ageing bin was in the thermostatted water medium, the constancy of temperature was not and receive external environment's influence in the messenger storehouse, and the bulkhead is heated evenly, and cang gai adopts the silica gel sealing washer, the locking of four point locations, and the seal is high, water drive turbine drives the fan, in the real -time surge bunker atmosphere with equilibrium of forces presses, guarantee the homogeneity of humidity, adopt semiconductor refrigeration heating device, avoided indoor ambient temperature's the influence that the change brought, adopt automatic temperature compensating formula temperature controller, improved the temperature -controlled precision.