Air-conditioning system

Abstract

An air-conditioning system according to the present disclosure comprises an indoor unit; a temperature measurement device; and a controller. The controller is configured to detect, in a case where a room has a plurality of ceilings having different heights, a high ceiling space being disposed at a position higher than a ceiling having a lowest height of the plurality of ceilings; detect the floor; calculate a temperature difference between the temperature of the high ceiling space detected by the temperature measurement device and the surface temperature of the floor detected by the temperature measurement device; and generate a first air flow according to a predetermined operating condition in a case where the temperature difference calculated is less than a first threshold, and generate a second air flow in a case where the temperature difference is equal to or more than the first threshold.

1 . An air-conditioning system comprising:
 an indoor unit;   a temperature measurement device; and   a controller;   the controller is configured to   detect, in a case where a room has a plurality of ceilings having different heights, a high ceiling space, the high ceiling space being disposed at a position higher than a ceiling having a lowest height of the plurality of ceilings;   detect the floor   calculate a temperature difference between the temperature of the high ceiling space detected by the temperature measurement device and the surface temperature of the floor detected by the temperature measurement device; and   generate a first air flow according to a predetermined operating condition in a case where the temperature difference calculated is less than a first threshold, and generate a second air flow in a case where the temperature difference is equal to or more than the first threshold, the second air flow being different from the first air flow in temperature, air flow direction or wind velocity.   
     
     
         2 . The air-conditioning system of  claim 1 , wherein
 the controller is configured to measure the temperature difference at least at two or more different clock times, and to calculate a change over time in the temperature difference from the temperature difference measured at least at the two or more different clock times, and   is configured to perform control of generating a third air flow in a case where the change over time in the temperature difference is equal to or more than a second threshold different from the first threshold, the third air flow being different from the second air flow in temperature, air flow direction or wind velocity.   
     
     
         3 . The air-conditioning system of  claim 2 , wherein
 the controller is configured to generate the second air flow in a case where the change over time in the temperature difference is less than the second threshold and, of the temperature difference measured at least at the two or more different clock times, the temperature difference measured last is equal to or more than the first threshold.   
     
     
         4 . The air-conditioning system of  claim 2 , comprising:
 a sucked air temperature measurement sensor configured to measure a temperature of indoor air sucked into the indoor unit, wherein   the controller is configured to acquire information on a target temperature set by a user, and generate a fourth air flow having a higher temperature than the first air flow in a case where either one of the second air flow or the third air flow is generated and the temperature of the indoor air measured by the sucked air temperature measurement sensor is lower than the target temperature.   
     
     
         5 . The air-conditioning system of  claim 2 , wherein
 the controller is configured to change a direction of the second air flow and a direction of the third air flow in a vertical direction according to a distance between the indoor unit and the high ceiling space.   
     
     
         6 . The air-conditioning system of  claim 2 , wherein
 the temperature measurement device is configured to measure a surface temperature of an object present in a space between the floor and the high ceiling space,   the controller is configured to detect presence of a person in a room from the surface temperature of the object measured by the temperature measurement device, and to further detect a direction in which the person is present as viewed from the indoor unit, and   is configured to, in a case where the person is present in the room, control the direction of the second air flow or the direction of the third air flow in a lateral direction to a direction other than the direction in which the detected person is present.   
     
     
         7 . The air-conditioning system of  claim 1 , wherein the controller is configured to detect a position of a person outside the room, to predict entry of the person into the room from a change over time in the position of the person outside the room,
 and to generate a fifth air flow in a case where the controller predicts entry of the person into the room and the temperature difference calculated is greater than the first threshold, the fifth air flow performing only sending of air without performing temperature adjustment.   
     
     
         8 . The air-conditioning system of  claim 1 , further comprising a distance measurement device configured to measure a distance from the indoor unit to the plurality of ceilings, wherein the controller is configured to detect a high ceiling space based on the distance from the indoor unit to the plurality of ceilings measured by the distance measurement device. 
     
     
         9 . The air-conditioning system of  claim 1 , further comprising a distance measurement device configured to measure a distance from the indoor unit to the floor and a distance from the indoor unit to a wall, wherein the floor detection unit is configured to detect the floor based on the distance from the indoor unit to the floor measured by the distance measurement device and a distance from the indoor unit to the wall measured by the distance measurement device. 
     
     
         10 . The air-conditioning system of  claim 1 , wherein the second air flow has a lower temperature than the first air flow or has a larger velocity component in a vertical direction than the first air flow. 
     
     
         11 . The air-conditioning system of  claim 2 , wherein the third air flow has a lower temperature than the second air flow or has a larger velocity component in a vertical direction than the second air flow.