Air-conditioning system

Patent metadata

Field	Value
Publication number	US-2019063774-A1
Application number	US-201616074829-A
Country	US
Kind code	A1
Filing date	Nov 22, 2016
Priority date	Feb 25, 2016
Publication date	Feb 28, 2019
Grant date	—

Abstract

An air-conditioning system includes: a controller configured to: extract a lower limit load that occurs at a minimum, in a load that occurs in an air-conditioned space and that changes depending a time period; distribute a proportion at which the extracted lower limit load is to be processed, as a processing proportion stored in a memory; control each of air-conditioning apparatuses that are at a second place and subsequent places in apparatus rankings, such that the lower limit load is processed and distributed, and to control an air-conditioning apparatus that is at a first place in the apparatus rankings, such that a remaining load of the lower limit load and a fluctuating load that occurs over the lower limit load are processed.

First claim

1 : An air-conditioning system comprising:
a plurality of air-conditioning apparatuses configured to condition air in an air-conditioned space; a storage unit configured to store an apparatus rankings created for the plurality of air-conditioning apparatuses in order of a shorter time taken to reach a set temperature, and a processing proportion of a load to be processed by each of the air-conditioning apparatuses that are at a second place and subsequent places in the apparatus rankings; and a controller configured to control operation of the plurality of air-conditioning apparatuses, wherein the controller includes
an extraction unit configured to extract a lower limit load that occurs at a minimum, in a load that occurs in the air-conditioned space and that changes depending a time period,
a distribution unit configured to distribute a proportion at which the lower limit load extracted by the extraction unit is to be processed, as the processing proportion stored in the storage unit, and
an air-conditioning control unit configured to control each of the air-conditioning apparatuses that are at the second place and subsequent places in the apparatus rankings, such that the lower limit load is processed at the processing proportion distributed by the distribution unit, and to control the air-conditioning apparatus that is at a first place in the apparatus rankings, such that a remaining load of the lower limit load and a fluctuating load that occurs over the lower limit load are processed.

2 : The air-conditioning system of claim 1 , wherein the apparatus rankings stored in the storage unit are created with reference to a catalog indicating characteristics of each air-conditioning apparatus.

3 : The air-conditioning system of claim 1 , wherein the apparatus rankings stored in the storage unit are created with reference to operation data indicating an operation status of each air-conditioning apparatus.

4 : The air-conditioning system of claim 1 , further comprising an input unit configured to input a processing proportion of a load to be processed by each of the air-conditioning apparatuses that are at the second place and subsequent places in the apparatus rankings, wherein
the controller has a function to store the processing proportion input with the input unit, in the storage unit.

5 : The air-conditioning system of claim 4 , wherein the controller has a function to request re-input to the input unit when a processing proportion input with the input unit is less than a proportion lower limit threshold.

6 : The air-conditioning system of claim 1 , wherein the extraction unit includes an error calculation unit configured to calculate a lower limit of an error occurring in a load that occurs in the air-conditioned space, and calculate the lower limit load.

7 : The air-conditioning system of claim 1 , wherein the extraction unit further includes a load prediction unit configured to predict a load that will occur in the air-conditioned space, on the basis of operation data indicating an operation status of each air-conditioning apparatus and an air-conditioning situation that can occur in a control period.

8 : The air-conditioning system of claim 1 , wherein the extraction unit further includes a load estimation unit configured to estimate a load that will occur in the air-conditioned space, on the basis of a present operation status of each air-conditioning apparatus.

Assignees

• Mitsubishi Electric Corp

Inventors

• Nakajima Osamu
• Motodani Mio

Classifications

• F24F11/46 Primary

  Improving electric energy efficiency or saving · CPC title

• F24F11/64

  using pre-stored data · CPC title

• F24F11/65

  for selecting an operating mode · CPC title

• F24F11/89

  Arrangement or mounting of control or safety devices · CPC title

• G05B13/048

  using a predictor · CPC title