Air conditioning apparatus and air conditioning control method

Patent metadata

Field	Value
Publication number	US-2019293311-A1
Application number	US-201916354765-A
Country	US
Kind code	A1
Filing date	Mar 15, 2019
Priority date	Mar 20, 2018
Publication date	Sep 26, 2019
Grant date	—

Abstract

An air conditioning apparatus includes: an absolute humidity set value calculation section that acquires a first absolute humidity determined from a first temperature and a first relative humidity, the first temperature and the first relative humidity being previously set; a dew-point temperature calculation section that acquires a dew-point temperature determined from the first temperature and the first relative humidity; an absolute humidity calculation section that acquires a second absolute humidity determined from a second temperature indicating a temperature inside the room and a second relative humidity indicating a relative humidity inside the room; and a heat exchanger temperature comparison and determination section and an indoor unit fan/blow-off port control section that control a dehumidification operation that stops air-blowing of an indoor unit fan, closes an blow-off port, and cools an indoor heat exchanger at the dew-point temperature when the second absolute humidity is higher than the first absolute humidity.

First claim

1 . An air conditioning apparatus comprising:
a first acquisition section that acquires a first absolute humidity indicating a target absolute humidity determined from a first temperature indicating a previously set temperature and a first relative humidity indicating a previously set relative humidity; a second acquisition section that acquires a dew-point temperature determined from the first temperature and the first relative humidity; a third acquisition section that acquires a second absolute humidity indicating an absolute humidity inside a room, the absolute humidity being determined from a second temperature indicating a temperature inside the room and a second relative humidity indicating a relative humidity inside the room; a heat exchanger that exchanges heat between air inside the room and a refrigerant; an air blower that blows air cooled by the heat exchanger; an air outlet for blowing air blown by the air blower into the room; and a control section that controls a dehumidification operation that stops air-blowing of the air blower, closes the air outlet, and cools the heat exchanger at the dew-point temperature when the second absolute humidity is higher than the first absolute humidity.

2 . The air conditioning apparatus according to claim 1 , wherein
the first acquisition section includes a first calculation section that acquires the first temperature and the first relative humidity and calculates the first absolute humidity from the first temperature and the first relative humidity, the second acquisition section includes a second calculation section that acquires the first temperature and the first relative humidity and calculates the dew-point temperature from the first temperature and the first relative humidity, and the third acquisition section includes a third calculation section that acquires the second temperature and the second relative humidity and calculates the second absolute humidity from the second temperature and the second relative humidity.

3 . The air conditioning apparatus according to claim 1 , wherein
the control section continues cooling of the heat exchanger while the second absolute humidity is higher than the first absolute humidity.

4 . The air conditioning apparatus according to claim 1 , wherein
the control section continues cooling of the heat exchanger while a temperature of the heat exchanger is not lower than the dew-point temperature.

5 . The air conditioning apparatus according to claim 1 , further comprising a fourth acquisition section that acquires a third temperature indicating a temperature outside the room,
wherein the control section starts the dehumidification operation when the first temperature or the second temperature is higher than the third temperature.

6 . The air conditioning apparatus according to claim 1 , wherein
the control section cools the heat exchanger so that a temperature of the heat exchanger falls within a predetermined range including the dew-point temperature after the second absolute humidity reaches the first absolute humidity in the dehumidification operation.

7 . An air conditioning control method for controlling an air conditioning apparatus using a processor, the air conditioning apparatus including a heat exchanger that exchanges heat between air inside a room and a refrigerant, an air blower that blows air cooled by the heat exchanger, and an air outlet for blowing air blown by the air blower into the room, the air conditioning control method comprising:
acquiring a first absolute humidity indicating a target absolute humidity determined from a first temperature indicating a previously set temperature and a first relative humidity indicating a previously set relative humidity; acquiring a dew-point temperature determined from the first temperature and the first relative humidity; acquiring a second absolute humidity indicating an absolute humidity inside the room, the absolute humidity being determined from a second temperature indicating a temperature inside the room and a second relative humidity indicating a relative humidity inside the room; and controlling a dehumidification operation that stops air-blowing of the air blower, closes the air outlet, and cools the heat exchanger at the dew-point temperature when the second absolute humidity is higher than the first absolute humidity.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kohashi Yasuo
• Sugimoto Hiroko

Classifications

• F24F3/14

  by humidification; by dehumidification · CPC title

• F24F2110/10

  Temperature · CPC title

• F24F2003/1446

  by condensing · CPC title

• F24F11/30 Primary

  for purposes related to the operation of the system, e.g. for safety or monitoring · CPC title

• F24F11/74

  for controlling air flow rate or air velocity · CPC title