Air-conditioning control system and air-conditioning control method

Patent metadata

Field	Value
Publication number	US-9784464-B2
Application number	US-201414771685-A
Country	US
Kind code	B2
Filing date	Feb 6, 2014
Priority date	Apr 22, 2013
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

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

The invention claimed is:

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. An air-conditioning control method of controlling air-conditioning equipment installed in a building, the air-c

Assignees

• Mitsubishi Electric Corp

Inventors

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

Classifications

• F24F11/58

  using Internet communication · CPC title

• F24F11/57

  using telephone networks · CPC title

• F24F11/63

  Electronic processing · CPC title

• F24F11/46 Primary

  Improving electric energy efficiency or saving · CPC title

• G05B13/026

  using a predictor · CPC title