Ventilation control device, ventilation system, and program

Abstract

In a ventilation control device, a ventilation-path setting unit is configured to set a ventilation path based on environmental information acquired by an information acquisition unit. A ventilation-quantity setting unit is configured to set a ventilation quantity based on the environmental information and the ventilation path. The ventilation-path setting unit sets a plurality of candidate paths having priorities in descending order of expected ventilation effects. In the case where a first candidate path having the highest priority is identical with a previously set ventilation path, the ventilation-path setting unit sets the first candidate path as the ventilation path, when a difference value between a room temperature previously acquired and a room temperature presently acquired is equal to or more than a threshold. The ventilation-path setting unit sets, as the ventilation path, a second candidate path having the second highest priority, when the difference value is less than the threshold.

1 . A ventilation control device configured, at predetermined intervals, to switch to a ventilation path in a building and to set a ventilation quantity of air passing through the ventilation path, the ventilation control device comprising:
 an information acquisition unit configured to acquire environmental information, the environmental information comprising: weather information comprising wind pertinent information about wind flowing outside the building, and air temperature and air humidity outside the building; and indoor environmental information comprising room temperature and room humidity in the building, the air temperature outside the building being an outside air temperature, the air humidity outside the building being an outside air humidity;   a ventilation-path setting unit configured to set the ventilation path based on the environmental information acquired by the information acquisition unit;   a ventilation-quantity setting unit configured to set the ventilation quantity based on the environmental information acquired by the information acquisition unit and the ventilation path that is set by the ventilation-path setting unit; and   an output unit configured to output the ventilation path that is set by the ventilation-path setting unit and the ventilation quantity that is set by the ventilation-quantity setting unit,   wherein the ventilation-path setting unit is configured:   to set a plurality of candidate paths based on the environmental information, the plurality of candidate paths having priorities in descending order of expected ventilation effects; and   in a case where a first candidate path having a highest priority of the plurality of candidate paths is identical with a previously set ventilation path, to set the first candidate path as the ventilation path, when a difference value between a room temperature previously acquired by the information acquisition unit and a room temperature presently acquired by the information acquisition unit is equal to or more than a predetermined threshold, and to set, as the ventilation path, a second candidate path having a second highest priority of the plurality of candidate paths, when the difference value is less than the predetermined threshold.   
     
     
         2 . The ventilation control device according to  claim 1 , wherein the ventilation-path setting unit is configured to always set the second candidate path as the ventilation path after the difference value in the first candidate path is less than the predetermined threshold predetermined times. 
     
     
         3 . The ventilation control device according to  claim 1 , further comprising an opening control unit configured to control an opening control device configured to control opening/closing of an opening formed in the building, based on the ventilation path and the ventilation quantity that are output from the output unit. 
     
     
         4 . The ventilation control device according to  claim 3 , further comprising:
 a state determining unit configured to determine a state of a ventilation auxiliary device configured to assist ventilation through the ventilation path according to the ventilation path and the ventilation quantity that are output from the output unit; and   an auxiliary-control unit configured to control the ventilation auxiliary device so that the ventilation auxiliary device is in the state determined by the state determining unit.   
     
     
         5 . The ventilation control device according to  claim 1 , further comprising:
 a first determining unit configured to determine whether or not a first absolute difference, which indicates an absolute difference between the room temperature and the outside air temperature that are acquired by the information acquisition unit, is less than a first specified value;   a second determining unit configured, when the first absolute difference is less than the first specified value, to determine whether or not a second absolute difference, which indicates an absolute difference between the room temperature acquired by the information acquisition unit and a preset temperature in the ventilation path, is less than a second specified value;   a third determining unit configured, when the second absolute difference is less than the second specified value, to determine whether or not a third absolute difference, which indicates an absolute difference between the room temperature presently acquired by the information acquisition unit and the room temperature previously acquired by the information acquisition unit, is less than a third specified value; and   a switching-interval setting unit configured:
 to set each of the predetermined intervals to a first time period, when the first absolute difference is equal to or more than the first specified value, when the second absolute difference is equal to or more than the second specified value, or when the third absolute difference is equal to or more than the third specified value; and 
 to set each of the predetermined intervals to a second time period longer than the first time period when the third absolute difference is less than the third specified value. 
   
     
     
         6 . A ventilation system comprising:
 the ventilation control device according to  claim 1 ; and   an opening control device configured to control opening/closing of an opening of the building by control of the ventilation control device.   
     
     
         7 . A computer-readable recording medium recording a program for, at predetermined intervals, switching to a ventilation path in a building and setting a ventilation quantity of air passing through the ventilation path, the program causing a computer to function as:
 a ventilation-path setting unit configured to set the ventilation path based on environmental information acquired by an information acquisition unit, the environmental information comprising: weather information comprising wind pertinent information about wind flowing outside the building, and air temperature and air humidity outside the building; and indoor environmental information comprising room temperature and room humidity in the building, the air temperature outside the building being an outside air temperature, the air humidity outside the building being an outside air humidity;   a ventilation-quantity setting unit configured to set the ventilation quantity based on the environmental information acquired by the information acquisition unit and the ventilation path that is set by the ventilation-path setting unit; and   an output unit configured to output the ventilation path that is set by the ventilation-path setting unit and the ventilation quantity that is set by the ventilation-quantity setting unit,   wherein the program causes the computer, as the ventilation-path setting unit:   to set a plurality of candidate paths based on the environmental information, the plurality of candidate paths having priorities in descending order of expected ventilation effects; and   to set, in a case where a first candidate path having a highest priority of the plurality of candidate paths is identical with a previously set ventilation path, the first candidate path as the ventilation path, when a difference value between a room temperature previously acquired by the information acquisition unit and a room temperature presently acquired by the information acquisition unit is equal to or more than a predetermined threshold, and to set, as the ventilation path, a second candidate path having a second highest priority of the plurality of candidate paths, when the difference value is less than the predetermined threshold.   
     
     
         8 . The ventilation control device according to  claim 2 , further comprising an opening control unit configured to control an opening control device configured to control opening/closing of an opening formed in the building, based on the ventilation path and the ventilation quantity that are output from the output unit. 
     
     
         9 . The ventilation control device according to  claim 8 , further comprising:
 a state determining unit configured to determine a state of a ventilation auxiliary device configured to assist ventilation through the ventilation path according to the ventilation path and the ventilation quantity that are output from the output unit; and   an auxiliary-control unit configured to control the ventilation auxiliary device so that the ventilation auxiliary device is in the state determined by the state determining unit.   
     
     
         10 . The ventilation control device according to  claim 2 , further comprising:
 a first determining unit configured to determine whether or not a first absolute difference, which indicates an absolute difference between the room temperature and the outside air temperature that are acquired by the information acquisition unit, is less than a first specified value;   a second determining unit configured, when the first absolute difference is less than the first specified value, to determine whether or not a second absolute difference, which indicates an absolute difference between the room temperature acquired by the information acquisition unit and a preset temperature in the ventilation path, is less than a second specified value;   a third determining unit configured, when the second absolute difference is less than the second specified value, to determine whether or not a third absolute difference, which indicates an absolute difference between the room temperature presently acquired by the information acquisition unit and the room temperature previously acquired by the information acquisition unit, is less than a third specified value; and   a switching-interval setting unit configured:
 to set each of the predetermined intervals to a first time period, when the first absolute difference is equal to or more than the first specified value, when the second absolute difference is equal to or more than the second specified value, or when the third absolute difference is equal to or more than the third specified value; and 
 to set each of the predetermined intervals to a second time period longer than the first time period when the third absolute difference is less than the third specified value. 
   
     
     
         11 . The ventilation control device according to  claim 3 , further comprising:
 a first determining unit configured to determine whether or not a first absolute difference, which indicates an absolute difference between the room temperature and the outside air temperature that are acquired by the information acquisition unit, is less than a first specified value;   a second determining unit configured, when the first absolute difference is less than the first specified value, to determine whether or not a second absolute difference, which indicates an absolute difference between the room temperature acquired by the information acquisition unit and a preset temperature in the ventilation path, is less than a second specified value;   a third determining unit configured, when the second absolute difference is less than the second specified value, to determine whether or not a third absolute difference, which indicates an absolute difference between the room temperature presently acquired by the information acquisition unit and the room temperature previously acquired by the information acquisition unit, is less than a third specified value; and   a switching-interval setting unit configured:
 to set each of the predetermined intervals to a first time period, when the first absolute difference is equal to or more than the first specified value, when the second absolute difference is equal to or more than the second specified value, or when the third absolute difference is equal to or more than the third specified value; and 
 to set each of the predetermined intervals to a second time period longer than the first time period when the third absolute difference is less than the third specified value. 
   
     
     
         12 . The ventilation control device according to  claim 4 , further comprising:
 a first determining unit configured to determine whether or not a first absolute difference, which indicates an absolute difference between the room temperature and the outside air temperature that are acquired by the information acquisition unit, is less than a first specified value;   a second determining unit configured, when the first absolute difference is less than the first specified value, to determine whether or not a second absolute difference, which indicates an absolute difference between the room temperature acquired by the information acquisition unit and a preset temperature in the ventilation path, is less than a second specified value;   a third determining unit configured, when the second absolute difference is less than the second specified value, to determine whether or not a third absolute difference, which indicates an absolute difference between the room temperature presently acquired by the information acquisition unit and the room temperature previously acquired by the information acquisition unit, is less than a third specified value; and   a switching-interval setting unit configured:
 to set each of the predetermined intervals to a first time period, when the first absolute difference is equal to or more than the first specified value, when the second absolute difference is equal to or more than the second specified value, or when the third absolute difference is equal to or more than the third specified value; and 
 to set each of the predetermined intervals to a second time period longer than the first time period when the third absolute difference is less than the third specified value. 
   
     
     
         13 . The ventilation control device according to  claim 8 , further comprising:
 a first determining unit configured to determine whether or not a first absolute difference, which indicates an absolute difference between the room temperature and the outside air temperature that are acquired by the information acquisition unit, is less than a first specified value;   a second determining unit configured, when the first absolute difference is less than the first specified value, to determine whether or not a second absolute difference, which indicates an absolute difference between the room temperature acquired by the information acquisition unit and a preset temperature in the ventilation path, is less than a second specified value;   a third determining unit configured, when the second absolute difference is less than the second specified value, to determine whether or not a third absolute difference, which indicates an absolute difference between the room temperature presently acquired by the information acquisition unit and the room temperature previously acquired by the information acquisition unit, is less than a third specified value; and   a switching-interval setting unit configured:
 to set each of the predetermined intervals to a first time period, when the first absolute difference is equal to or more than the first specified value, when the second absolute difference is equal to or more than the second specified value, or when the third absolute difference is equal to or more than the third specified value; and 
 to set each of the predetermined intervals to a second time period longer than the first time period when the third absolute difference is less than the third specified value. 
   
     
     
         14 . The ventilation control device according to  claim 9 , further comprising:
 a first determining unit configured to determine whether or not a first absolute difference, which indicates an absolute difference between the room temperature and the outside air temperature that are acquired by the information acquisition unit, is less than a first specified value;   a second determining unit configured, when the first absolute difference is less than the first specified value, to determine whether or not a second absolute difference, which indicates an absolute difference between the room temperature acquired by the information acquisition unit and a preset temperature in the ventilation path, is less than a second specified value;   a third determining unit configured, when the second absolute difference is less than the second specified value, to determine whether or not a third absolute difference, which indicates an absolute difference between the room temperature presently acquired by the information acquisition unit and the room temperature previously acquired by the information acquisition unit, is less than a third specified value; and   a switching-interval setting unit configured:
 to set each of the predetermined intervals to a first time period, when the first absolute difference is equal to or more than the first specified value, when the second absolute difference is equal to or more than the second specified value, or when the third absolute difference is equal to or more than the third specified value; and 
 to set each of the predetermined intervals to a second time period longer than the first time period when the third absolute difference is less than the third specified value. 
   
     
     
         15 . A ventilation system comprising:
 the ventilation control device according to  claim 2 ; and   an opening control device configured to control opening/closing of an opening of the building by control of the ventilation control device.   
     
     
         16 . A ventilation system comprising:
 the ventilation control device according to  claim 3 ; and   the opening control device configured to control opening/closing of the opening of the building by control of the ventilation control device.   
     
     
         17 . A ventilation system comprising:
 the ventilation control device according to  claim 4 ; and   the opening control device configured to control opening/closing of the opening of the building by control of the ventilation control device.   
     
     
         18 . A ventilation system comprising:
 the ventilation control device according to  claim 5 ; and   an opening control device configured to control opening/closing of an opening of the building by control of the ventilation control device.   
     
     
         19 . A ventilation system comprising:
 the ventilation control device according to  claim 8 ; and   an opening control device configured to control opening/closing of an opening of the building by control of the ventilation control device.   
     
     
         20 . A ventilation system comprising:
 the ventilation control device according to  claim 9 ; and   an opening control device configured to control opening/closing of an opening of the building by control of the ventilation control device.