| 摘要 |
PURPOSE:To prevent the mode in a room from being set to an incorrect ventilating one even when a detected temp. becomes higher under the influence of an atmosphere by a method wherein an outdoor switching temp. for space cooling and heating is set to be lower than at indoor set temp. for space heating and even when the temp. of an indoor detector is higher than an indoor switching temp. for space cooling and heating, the indoor mode is controlled to be a space heating one if an outdoor detected temp. is lower than the outdoor switching temp. for space cooling and heating. CONSTITUTION:When an indoor temp. setting is set to 27 deg.C at the space cooling time and 21 deg.C at the space heating time respectively, an indoor switching temp. changing over a cooling mode and a heating one is 24 deg.C. When an indoor air temp. tRA is 25 deg.C and a relative humidity RHRA is 51%, a space cooling mode is achieved and similarly a space heating mode is achieved when an indoor temp. is 24 deg.C or lower. That is, on the basis of indoor air, a normal ventilating mode is achieved when the outdoor air temp. tOA, enthalpy iOA are both high, and a latent heat exchanging mode is achieved when an outdoor air temp. is lower than an indoor air temp. but an outdoor absolute humidity is higher than an indoor absolute humidity and a total heat exchanging mode is achieved when an outdoor enthalpy and absolute humidity are both lower than those of an indoor air.
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