Air-conditioning control system and air-conditioning control method

Patent metadata

Field	Value
Publication number	US-2016018124-A1
Application number	US-201414771685-A
Country	US
Kind code	A1
Filing date	Feb 6, 2014
Priority date	Apr 22, 2013
Publication date	Jan 21, 2016
Grant date	—

Abstract

A heat load predictor predicts a change over time of a heat amount to be processed by air-conditioning equipment, an operation plan creator previously creates an operation plan of the air-conditioning equipment to reduce an evaluation index under a first restrictive condition that a total process heat load be maintained at a same level or within a range of a predetermined amount of difference and a room temperature be maintained within a predetermined comfortable temperature range, and an operation plan corrector corrects the operation plan during controlling the air-conditioning equipment based on the operation plan. If an actually measured temperature differs from a predicted temperature predicted by the operation plan creator at the time of creating the operation plan, the operation plan creator predicts a change over time of the temperature in the room, and corrects the operation plan to minimize the evaluation index under the first restrictive condition.

First claim

1 . An air-conditioning control system configured to control air-conditioning equipment installed in a building, the air-conditioning control system comprising:
a heat load prediction unit configured to predict a change over time of a heat amount to be processed by the air-conditioning equipment based on provided heat load prediction data; an operation plan creation unit configured to previously create an operation plan of the air-conditioning equipment in an air-conditioning operation plan application period to reduce one of a power consumption amount and a running cost of the air-conditioning equipment serving as an evaluation index under a first restrictive condition that a total process heat load be maintained at one of a same level and within a range of a predetermined amount of difference and that a temperature in a room be maintained within a predetermined comfortable temperature range; an operation plan correction unit configured to correct the operation plan in a predetermined cycle during execution of control of the air-conditioning equipment in accordance with the operation plan; and a temperature sensor configured to measure the temperature in the room, wherein the operation plan creation unit and the operation plan correction unit include a temperature prediction block configured to predict a change over time of the temperature in the room based on provided temperature prediction data, wherein when an actually measured temperature measured by the temperature sensor is different from a predicted temperature predicted by the operation plan creation unit at a time of creation of the operation plan, the operation plan correction unit predicts a change over time of the temperature in the room in a correction application period in the plan application period, in which correction is performed, and corrects the operation plan to minimize the evaluation index under the first restrictive condition, with a second restrictive condition set as that an error between a predicted temperature predicted by the operation plan correction unit and the predicted temperature predicted by the operation plan creation unit be maintained within a predetermined allowable fluctuation range at one time or a plurality of times in the correction application period.

2 . The air-conditioning control system of claim 1 , wherein the first restrictive condition is combined with a restriction that a time rate of change of the temperature in the room in the plan application period be maintained within a preset temperature change rate.

3 . The air-conditioning control system of claim 1 , wherein when an operation pattern of the air-conditioning equipment does not satisfy the first restrictive condition, the operation plan creation unit redefines the evaluation index as a sum of the evaluation index and a weighted deviation amount from the first restrictive condition, and creates the operation plan based on the redefined evaluation index.

4 . The air-conditioning control system of claim 1 , wherein when an operation pattern of the air-conditioning equipment does not satisfy the first restrictive condition and the second restrictive condition, the operation plan correction unit redefines the evaluation index as a sum of the evaluation index and weighted deviation amounts from the first restrictive condition and the second restrictive condition, and corrects the operation plan based on the redefined evaluation index.

5 . The air-conditioning control system of claim 1 , wherein the operation plan creation unit combines the first restrictive condition with a restriction that power consumption corresponding to a first period included in the plan application period be maintained up to first target power, that power consumption in a period in the plan application period excluding the first period be maintained up to second target power, and that a comfortable temperature range corresponding to a second period preceding the first period be set to a range different from a comfortable temperature range corresponding to the first period.

6 . The air-conditioning control system of claim 1 , wherein the operation plan creation unit combines the first restrictive condition with a restriction that power consumption corresponding to a first period included in the plan application period be maintained up to first target power, that power consumption in a period in the plan application period excluding the first period be maintained up to second target power, and that a set temperature corresponding to a second period included in the plan application period and preceding the first period be set in a range different from a range of a set temperature corresponding to the first period.

7 . The air-conditioning control system of claim 5 , wherein the operation plan creation unit repeats setting of reducing in steps a comfortable temperature range corresponding to one of the second period and a set temperature corresponding to the second period and setting of extending the second period in steps until a comfortable temperature corresponding to the first period satisfies the first restrictive condition.

8 . The air-conditioning control system of claim 1 , further comprising at least one or more of:
a first pair including a humidity sensor configured to measure humidity in the room as an air-conditioned space of the air-conditioning equipment and a humidity prediction unit configured to predict a change over time of the humidity in the room based on provided humidity prediction data; and a second pair including a CO 2 sensor configured to measure a CO 2 concentration in the room as the air-conditioned space of the air-conditioning equipment and a CO 2 concentration prediction unit configured to predict a change over time of the CO 2 concentration in the room based on provided CO 2 concentration prediction data.

9 . The air-conditioning control system of claim 8 , wherein the evaluation index is combined with one or more of a degree of deviation of the temperature from a set temperature of the air-conditioning equipment, a time rate of change of the temperature in the room, a degree of deviation of the humidity from set humidity in the room, a time rate of change of the humidity in the room, a degree of deviation of the CO 2 concentration from a set CO 2 concentration in the room, and a time rate of change of the CO 2 concentration in the room in the plan application period.

10 . The air-conditioning control system of claim 9 , wherein the first restrictive condition is combined with one or more of a first condition that the time rate of change of the temperature in the room in the plan application period be maintained within a preset temperature change rate, a second condition that the humidity in the room in the plan application period be maintained within a preset comfortable humidity range, a third condition that the time rate of change of the humidity in the room in the plan application period be maintained within a preset humidity change rate, a fourth condition that temperature-humidity comfort, which is determined based on both the temperature in the room and the humidity in the room, in the plan application period be maintained within a preset comfortable temperature-humidity range, a fifth condition that the CO 2 concentration in the room in the plan application period be maintained within a preset comfortable CO 2 concentration range, and a sixth condition that the time rate of change of the CO 2 concentration in the room in the plan application period be maintained within a preset CO 2 concentration change rate.

11 - 12 . (canceled)

13 . An air-conditioning control method of controlling air-conditioning equipment

Assignees

• Mitsubishi Electric Corp

Inventors

• Yamamoto Takaya
• Uno Yoshitaka
• Motodani Mio
• Maitani Hiroshi
• Nakajima Osamu

Classifications

• F24F11/57

  using telephone networks · CPC title

• F24F11/46 Primary

  Improving electric energy efficiency or saving · CPC title

• F24F11/63

  Electronic processing · CPC title

• F24F11/58

  using Internet communication · CPC title

• G05B13/026

  using a predictor · CPC title