Air conditioner system, air conditioner control device, air conditioner method, and program

Patent metadata

Field	Value
Publication number	US-2019242597-A1
Application number	US-201616327027-A
Country	US
Kind code	A1
Filing date	Oct 24, 2016
Priority date	Oct 24, 2016
Publication date	Aug 8, 2019
Grant date	—

Abstract

An air-conditioning system includes a heat source unit, an air conditioner connected via piping to the heat source unit and configured to perform heat exchange between water supplied by the heat source unit and indoor air, a water circulation device for circulating the water between the heat source unit and the air conditioner, and an air-conditioning control device. The air-conditioning control device controls the heat source unit to lower temperature of the water flowing into the air conditioner, in accordance with an increase in an indoor humidity, and controls the water circulation device to lower temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor temperature.

First claim

1 . (canceled)

2 . An air-conditioning system comprising:
a heat source unit configured to supply temperature-controlled water; an air conditioner configured to perform heat exchange between the water supplied by the heat source unit and air taken in from an indoor space; a water circulator configured to circulate the water between the heat source unit and the air conditioner; and a water temperature controller configured to control
the heat source unit to lower temperature of the water supplied by the heat source unit, in accordance with an increase in an indoor latent heat load of the indoor space, and
a discharge rate of the water circulator to lower the temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor sensible heat load of the indoor space.

3 . The air-conditioning system according to claim 2 , wherein the water temperature controller comprises a learner configured to learn
a correlation between the indoor latent heat load and an indoor humidity of the indoor space by repeating at regular time intervals a process of (i) calculating a latent heat capacity of the air conditioner and (ii) generating data that indicates association between the calculated latent heat capacity and the indoor humidity, and a correlation between the indoor sensible heat load and an indoor temperature of the indoor space by repeating at regular time intervals a process of (i) calculating a sensible heat capacity of the air conditioner and (ii) generating data that indicates association between the calculated sensible heat capacity and the indoor temperature.

4 . The air-conditioning system according to claim 3 , wherein the learner calculates the latent heat capacity of the air conditioner based on humidity of air taken in by the air conditioner, humidity of air blown from the air conditioner, and a flow rate of air blown from the air conditioner, and calculates the sensible heat capacity of the air conditioner based on temperature of the air taken in by the air conditioner, temperature of the air blown from the air conditioner, and the flow rate of the air blown from the air conditioner.

5 . The air-conditioning system according to claim 2 , wherein the water temperature controller further comprises
a latent heat load detector configured to detect the indoor latent heat load based on a number of persons present in the indoor space, the indoor humidity, an outdoor humidity, and a ventilation air flow rate of the indoor space, and a sensible heat load detector configured to detect the indoor sensible heat load based on the number of persons present in the indoor space, power consumed in the indoor space, the indoor temperature, an outdoor temperature, and the ventilation air flow rate.

6 . An air-conditioning control device for control of:
a heat source unit configured to supply temperature-controlled water; and a water circulator configured to circulate the water between the heat source unit and an air conditioner, wherein the air-conditioning control device controls the heat source unit to lower temperature of the water supplied by the heat source unit, in accordance with an increase in an indoor latent heat load of the indoor space, and controls a discharge rate of the water circulator to lower the temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor sensible heat load of the indoor space.

7 . An air-conditioning method, performed by an air-conditioning system including a heat source unit configured to supply temperature-controlled water, an air conditioner configured to perform heat exchange between the water supplied by the heat source unit and air taken in from an indoor space, and a water circulator configured to circulate the water between the heat source unit and the air conditioner, the air-conditioning method comprising:
controlling (i) the heat source unit to lower temperature of the water supplied by the heat source unit, in accordance with an increase in an indoor latent heat load of the indoor space, and (ii) a discharge rate of the water circulator to lower the temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor sensible heat load of the indoor space.

8 . A non-transitory computer-readable recording medium storing a program executable by a computer for controlling a heat source unit configured to supply temperature-controlled water and a water circulator configured to circulate the water between the heat source unit and an air conditioner, the program causing the computer to:
control (i) the heat source unit to lower temperature of the water supplied by the heat source unit, in accordance with an increase in an indoor latent heat load of the indoor space, and (ii) the water circulator to lower the temperature of the water flowing from the air conditioner back to the heat source unit, in accordance with an increase in an indoor sensible heat load of the indoor space.

9 . The air-conditioning system according to claim 2 , wherein an indoor humidity of the indoor space is regarded as the indoor latent heat load and an indoor temperature of the indoor space is regarded as the indoor sensible heat load.

Assignees

• Mitsubishi Electric Corp

Inventors

• Hamada Mamoru
• Toyoshima Masaki

Classifications

• F25B2700/02

  Humidity · CPC title

• F25B25/005

  using primary and secondary systems · CPC title

• F25B2700/21161

  of the fluid heated by the condenser · CPC title

• F25B2313/0294

  related to the outdoor fan, e.g. controlling speed · CPC title

• F25B2700/21171

  of the fluid cooled by the evaporator · CPC title