Air-conditioning device, control device, air-conditioning method, and program

Abstract

In an air-conditioning device, an air-conditioning unit for air-conditioning a target space includes a compressor to compress a refrigerant and circulates the refrigerant through a refrigerant pipe, a heat exchanger to cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe, and a blower to feed air in the target space to the heat exchanger. An acquirer acquires a temperature and a humidity in the target space. An air-conditioning controller switches an operation mode in accordance with the temperature and the humidity acquired by the acquirer between a cooling mode in which the air-conditioning unit cools the target space, a dehumidification mode in which the air-conditioning unit dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing.

1 . An air-conditioning device, comprising:
 an air-conditioning unit to air-condition a target space, the air-conditioning unit including
 a compressor o compress a refrigerant and circulate the refrigerant through a refrigerant pipe, 
 a heat exchanger to cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe, and 
 a blower to feed air in the target space to the heat exchanger; 
   an acquirer to acquire a temperature and a. humidity in the target space; and   an air-conditioning controller to switch an operation mode, in accordance with the temperature and the humidity acquired by the acquirer, between a cooling mode in which the air-conditioning unit cools the target space, a dehumidification mode in which the air-conditioning unit dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing,   wherein in a case in which a humidity difference between the humidity acquired by the acquirer and a set humidity in the target space is greater than a first humidity threshold, the air-conditioning controller switches the operation mode to the dehumidification mode when a temperature difference between the temperature acquired by the acquirer and a set temperature of the target space decreases below a first temperature threshold during air-conditioning of the target space performed by the air-conditioning unit in the cooling mode.   
     
     
         2 . (canceled) 
     
     
         3 . The air-conditioning device according to  claim 1 ,
 in the case in which the humidity difference is greater than the first humidity threshold, the air-conditioning controller switches the operation mode to a second dehumidification mode in which a sensible heat capacity is smaller than in the dehumidification mode when the temperature difference decreases below a second temperature threshold smaller than the first temperature threshold during air-conditioning of the target space performed by the air-conditioning unit in the dehumidification mode.   
     
     
         4 . The air-conditioning device according to  claim 3 , wherein
 in the case in which the humidity difference is greater than the first humidity threshold, the air-conditioning controller stops the compressor when the temperature difference decreases below a third temperature threshold smaller than the second temperature threshold during air-conditioning of the target space performed by the air-conditioning unit in the second dehumidification mode.   
     
     
         5 . The air-conditioning device according to  claim 1 , wherein
 in a case in which a humidity difference between the humidity acquired by the acquirer and a set humidity in the target space is smaller than a second humidity threshold, the air-conditioning controller switches the operation node to the air-blowing mode when a temperature difference between the temperature acquired by the acquirer and a set temperature of the target space decreases below a fourth temperature threshold during air-conditioning of the target space performed by the air-conditioning unit in the cooling mode.   
     
     
         6 . The air-conditioning device according to  claim 5 , wherein
 in a case in which the temperature difference is smaller than the fourth temperature threshold, the air-conditioning controller switches the operation mode to the dehumidification mode when the humidity difference exceeds a first humidity threshold during air-conditioning of the target space performed by the air-conditioning unit in the air-blowing mode.   
     
     
         7 . The air-conditioning device according to  claim 1 , wherein
 the acquirer further acquires a temperature in an external space external to the target space, and   the air-conditioning controller switches the operation mode between the cooling mode and the dehumidification mode in accordance with a temperature difference between the temperature in the target space acquired by the acquirer and a set temperature of the target space, and a sensible heat load of the target space defined by the temperature in the external space acquired by the acquirer.   
     
     
         8 . The air-conditioning device according to  claim 1 , wherein
 the acquirer further acquires a humidity in an external space external to the target space, and   the air-conditioning controller switches the operation mode between the dehumidification mode and the air-blowing mode in accordance with a humidity difference between the humidity in the target space acquired by the acquirer and a set humidity in the target space, and a latent heat load of the target space defined by the humidity in the external space acquired by the acquirer.   
     
     
         9 . A control device for controlling an air-conditioning device to air-condition a target space, the air-conditioning device including a compressor to compress a refrigerant and circulate the refrigerant through a refrigerant pipe, a heat exchanger to cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe. and a blower to feed air in the target space to the heat exchanger, the control device comprising:
 an acquirer to acquire a temperature and a humidity in the target space; and   an air-conditioning controller to switch an operation mode, in accordance with the temperature and the humidity acquired by the acquirer, between a cooling mode in which the air-conditioning device cools the target space, a dehumidification mode in which the air-conditioning device dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing,   wherein in a case in which a humidity difference between the humidity acquired by the acquirer and a set humidity in the target space is greater than a first humidity threshold, the air-conditioning controller switches the operation mode to the dehumidification mode when a temperature difference between the temperature acquired by the acquirer and a set temperature of the target space decreases below a first temperature threshold during air-conditioning of the target space performed by the air-conditioning device in the cooling mode.   
     
     
         10 . An air-conditioning method for air-conditioning a target space with a compressor to compress a refrigerant and circulate the refrigerant through a refrigerant pipe, a heat exchanger o cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe, and a blower to feed air in the target space to the heat exchanger, the method comprising:
 acquiring a temperature and a humidity in the target space; and   switching an operation mode in accordance with the acquired temperature and the acquired humidity between a cooling mode for cooling the target space, a dehumidification mode for dehumidifying the target space, and an air-blowing mode for stopping the compressor without stopping air blowing of the blower,   wherein in a case in which a humidity difference between the humidity and a set humidity in the target space is greater than a first humidity threshold, the operation mode is switched to the dehumidification mode when a temperature difference between the temperature and a set temperature of the target space decreases below a first temperature threshold during air-conditioning of the target space in the cooling mode.   
     
     
         11 . A non-transitory computer-readable recording medium storing a program causing a computer to function as an acquirer and an air-conditioning controller, the computer being to control an air-conditioning device to air-condition a target space, the air-conditioning device including a compressor to compress a refrigerant and circulate the refrigerant through a refrigerant pipe, a heat exchanger to cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe, and a blower to feed air in the target space to the heat exchanger, wherein
 the acquirer acquires a temperature and a humidity in the target space, and   the air-conditioning controller switches an operation mode in accordance with the temperature and the humidity acquired by the acquirer between a cooling mode in which the air-conditioning device cools the target space, a dehumidification mode in which the air-conditioning device dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing,   wherein in a case in which a humidity difference between the humidity acquired by the acquirer and a set humidity in the target space is greater than a first humidity threshold, the air-conditioning controller switches the operation mode to the dehumidification mode when a temperature difference between the temperature acquired by the acquirer and a set temperature of the target space decreases below a first temperature threshold during air-conditioning of the target space performed by the air-conditioning device in the cooling mode.   
     
     
         12 . An air-conditioning device, comprising:
 an air-conditioning unit to air-condition a target space, the air-conditioning unit including
 a compressor to compress a refrigerant and circulate the refrigerant through a refrigerant pipe, 
 a heat exchanger to cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe, and 
 a blower to feed air in the target space to the heat exchanger; 
   an acquirer to acquire a temperature and a humidity in the target space; and   an air-conditioning controller to switch an operation mode, in accordance with the temperature and the humidity acquired by the acquirer, between a cooling mode in which the air-conditioning unit cools the target space, a dehumidification mode in which the air-conditioning unit dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing,   wherein   in a case in which a humidity difference between the humidity acquired by the acquirer and a set humidity in the target space is smaller than a second humidity threshold, the air-conditioning controller switches the operation mode to the air-blowing mode when a temperature difference between the temperature acquired by the acquirer and a set temperature of the target space decreases below a fourth temperature threshold during air-conditioning of the target space performed by the air-conditioning unit in the cooling mode.   
     
     
         13 . An air-conditioning device, comprising:
 an air-conditioning unit to air-condition a target space, the air-conditioning unit including
 a compressor to compress a refrigerant and circulate the refrigerant through a refrigerant pipe, 
 a heat exchanger to cause heat exchange between air in the target space and the refrigerant circulating through the refrigerant pipe, and 
 a blower to teed air in the target space to the heat exchanger; 
   an acquirer to acquire a temperature and a humidity in the target space and a temperature in an external space external to the target space; and   an air-conditioning controller to switch an operation mode, in accordance with the temperature and the humidity acquired by the acquirer, between a cooling mode in which the air-conditioning unit cools the target space, a dehumidification mode in which the air-conditioning unit dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing,   wherein the air-conditioning controller switches the operation mode between the cooling mode and the dehumidification mode in accordance with a temperature difference between the temperature in the target space acquired by the acquirer and a set temperature of the target space, and a sensible heat load of the target space defined by the temperature in the external space acquired by the acquirer.   
     
     
         14 . An air-conditioning device, comprising:
 an air-conditioning unit to air-condition a target space, the air-conditioning unit including
 a compressor to compress a refrigerant and circulate the refrigerant through a refrigerant pipe, 
 a heat exchanger to cause heat exchange between air in the target space and the refrigerant, circulating through the refrigerant pipe, and 
 a blower to feed air in the target space to the heat exchanger; 
   an acquirer to acquire a temperature and a humidity in the target space and a humidity in an external space external to the target space; and   an air-conditioning controller to switch an operation mode, in accordance with the temperature and the humidity acquired by the acquirer, between a cooling mode in which the air-conditioning unit cools the target space, a dehumidification mode in which the air-conditioning unit dehumidifies the target space, and an air-blowing mode in which the compressor is stopped without the blower stopping air blowing,   wherein the air-conditioning controller switches the operation mode between the dehumidification mode and the air-blowing mode in accordance with a humidity difference between the humidity in the target space acquired by the acquirer and a set humidity in the target space, and a latent heat load of the target space defined by the humidity in the external space acquired by the acquirer.