Air-conditioning management device and air-conditioning system using the same

Patent metadata

Field	Value
Publication number	US-10113766-B2
Application number	US-201515528126-A
Country	US
Kind code	B2
Filing date	Feb 23, 2015
Priority date	Feb 23, 2015
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

An air-conditioning management device includes: a power consumption obtaining unit that obtains both individual air-conditioned area and overall power consumption amounts in one day; an overall excess coefficient calculation unit that calculates an overall excess coefficient on a monthly basis; an individual excess coefficient calculation unit that calculates individual excess coefficients each indicating a degree of excess from the individual target value on a monthly basis; an excess determination unit that determines whether the overall excess coefficient is larger than a set threshold value; an energy saving control setting unit that sets energy saving control conditions for the respective air-conditioned areas to provide high energy saving effects in descending order of the individual excess coefficients when the overall excess coefficient is determined to be larger than the set threshold value; and an operation control unit that performs energy saving operation of the air-conditioning apparatuses based on the energy saving control conditions.

First claim

The invention claimed is:

1. An air-conditioning management device configured to manage power consumption amounts of one or a plurality of air-conditioning apparatuses performing air-conditioning in a plurality of air-conditioned areas, the air-conditioning management device comprising:
a power consumption obtaining unit configured to obtain an overall power consumption amount of the one or plurality of air-conditioning apparatuses in their entirety in one day and individual power consumption amounts of the respective plurality of air-conditioned areas;
an overall excess coefficient calculation unit configured to calculate an overall excess coefficient from the overall power consumption amount in one day obtained by the power consumption obtaining unit and an overall target value set on a monthly basis, the overall excess coefficient indicating a degree of excess from the overall target value on the monthly basis;
an individual excess coefficient calculation unit configured to calculate individual excess coefficients from the individual power consumption amounts in one day obtained by the power consumption obtaining unit and individual target values set on a monthly basis, the individual excess coefficients each indicating a degree of excess from the individual target value on the monthly basis;
an excess determination unit configured to determine whether or not the overall excess coefficient calculated in the overall excess coefficient calculation unit is larger than a set threshold value;
an energy saving control setting unit configured to set energy saving control conditions for the respective plurality of air-conditioned areas to provide increased energy saving effects in descending order of the individual excess coefficients calculated in the individual excess coefficient calculation unit when the overall excess coefficient is determined, in the excess determination unit, to be larger than the set threshold value; and
an operation control unit configured to perform energy saving operation of the air-conditioning apparatuses based on the energy saving control conditions set in the energy saving control setting unit.

2. The air-conditioning management device of claim 1 , wherein the overall excess coefficient calculation unit is configured to convert the overall target value set on the monthly basis into the overall target value on a daily basis, calculate the overall excess coefficient on a daily basis by dividing the overall power consumption amount in one day by the converted overall target value on the daily basis, cumulatively add the overall excess coefficient on the daily basis from beginning of a month to a current day, and calculate an average value of the cumulatively added overall excess coefficient as the overall excess coefficient on a monthly basis.

3. The air-conditioning management device of claim 2 , wherein the individual excess coefficient calculation unit is configured to store a power usage ratio of each of the plurality of air-conditioned areas, calculate the individual target value on a daily basis in each of the plurality of air-conditioned areas from the overall target value on the daily basis by use of the power usage ratio, calculate the individual excess coefficient on a daily basis by dividing the individual power consumption amount in one day by the individual target value on the daily basis, cumulatively add the individual excess coefficients on the daily basis from beginning of a month to a current day, and calculate an average value of the cumulatively added individual excess coefficients as the individual excess coefficient on a monthly basis.

4. The air-conditioning management device of claim 1 , wherein the energy saving control setting unit comprises:
an energy saving level setting unit configured to set energy saving levels each indicating a degree of energy saving control in accordance with magnitude of the overall excess coefficient;
a control setting table configured to store a content of the energy saving control and a priority ranking of the energy saving control associated with each other for each of the energy saving levels;
a ranking determination unit configured to determine a priority ranking to perform the energy saving control in descending order of values of the individual excess coefficients; and
a control condition setting unit configured to set conditions on the energy saving control for each of the air-conditioned areas from the control setting table based on the energy saving level set in the energy saving level setting unit and the priority ranking of each of the air-conditioned areas determined in the ranking determination unit.

5. An air-conditioning system comprising:
one or a plurality of air-conditioning apparatuses performing air-conditioning in a plurality of air-conditioned areas; and
the air-conditioning management device of claim 1 configured to manage power consumption amounts of the one or plurality of air-conditioning apparatuses.

Assignees

• Mitsubishi Electric Corp

Inventors

• Asada Satoshi

Classifications

• F24F2110/00

  Control inputs relating to air properties · CPC title

• F24F2140/60

  Energy consumption · CPC title

• F24F11/65

  for selecting an operating mode · CPC title

• F24F2140/50

  Load · CPC title

• F24F11/30

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