JP4217092B2 - Air conditioner demand control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a demand control device for an air conditioner that restricts the power consumption when the total power consumption of a plurality of air conditioners installed in the same building exceeds a preset reference value. The present invention relates to a demand control device for an air conditioner that limits the amount of electric power used by the air conditioner without giving any air pressure.
[0002]
[Prior art]
Conventionally, when the total power consumption of multiple air conditioners exceeds a preset reference value, demand control such as stopping the air conditioner according to a preset priority order or limiting the capacity of the air conditioner is performed. (For example, refer to Patent Document 1 and Patent Document 2).
[0003]
[Patent Document 1]
JP 2002-139238 A [Patent Document 2]
JP-A-5-164376
[Problems to be solved by the invention]
However, conventional demand control devices for air conditioners perform demand control only on the basis of preset priorities, so temperature differences due to temperature changes or malfunctions caused by sunlight or the like caused by air conditioners not operating. In some cases, there has been a problem of increasing the temperature change or temperature difference.
[0005]
For example, considering that the temperature on the south side of the building rises during the daytime due to radiant heat from sunshine, the priority on the south side is the lowest in demand control during cooling, but the sun moves as time passes, The temperature rise range also changes. Even if the temperature on the west side of the building rises in the evening, if the air conditioner on the west side with high priority of demand control is stopped or the capacity is reduced in the same way as in the daytime, the temperature difference between the west side and the south side of the building There was a problem that increased.
[0006]
In addition, when there is an air conditioner that cannot be operated due to a failure or the like, the temperature may not increase during heating and may not decrease during cooling around the air conditioner. At this time, since a plurality of air conditioners are installed, they cannot be heated or cooled, and are supplemented by other operating air conditioners installed in the same area. However, if demand control is performed only in accordance with the priority order set in advance, the air conditioner that complements the air conditioner that cannot be operated will be stopped or its capacity will be reduced, and the temperature will decrease during heating, and the temperature will decrease during cooling. There was a problem of rising.
[0007]
The present invention is for solving the above-described problems, and it is possible to reduce the temperature change or temperature difference during demand control and limit the power consumption of the air conditioner without causing discomfort. An object is to provide a control device.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, a demand control device for an air conditioner according to the present invention includes:
In a demand control device for an air conditioner that limits power consumption when the total power consumption of a plurality of air conditioners installed in the same building exceeds a preset reference value, the total of the plurality of air conditioners is A power meter that detects the amount of power used, an air conditioner failure detection means that detects a failure of the plurality of air conditioners, and a case where the total power used detected by the power meter exceeds a preset reference value Priority order determining means for determining the priority order of the air conditioners to be demand-controlled so as to lower the priority order of the air conditioners adjacent to the failed air conditioner based on the information detected by the air conditioner failure detecting means; And air conditioner control means for performing stop control or capacity reduction control of the air conditioner according to the priority order information from the priority order determining means.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings showing embodiments thereof.
Embodiment 1 FIG.
1 is a configuration diagram of a demand control device for an air conditioner according to Embodiment 1 of the present invention. The demand control device for an air conditioner according to the present invention includes a power meter 5 that detects the total power consumption of the air conditioners 2a to 2c, 3a to 3c, and 4a to 4c installed in a building 1, and a sun that detects the position of the sun. When the total power used detected by the position detector 7 and the wattmeter 5 exceeds a preset reference value, the air conditioner to be demand controlled based on the information detected by the solar position detector 7 Priority order determining means 6 for determining the priority order, and air conditioner control means 8 for performing stop control of the air conditioner or reduction control of the capacity according to the priority order information from the priority order determining means 6.
[0012]
In the above-described configuration, the priority of the sun position and the demand control of the air conditioner will be described. FIG. 2 shows the building 1 and air conditioners 2a to 2c, 3a to 3c, 4a to 4c, solar positions 9a to 9c, and sunshine directions 10a to 10b. In FIG. 2, when the sun is in the direction of the solar position 9a, the sunlight from the sun is in the direction of sunlight 10a, and the temperature rise due to the sunlight in the building 1 is higher toward the solar position 9a side. Accordingly, the priority order of demand control such as stop control of the air conditioner or reduction control of the capacity is the highest in the air conditioners 2c, 3c, 4c, and then the air conditioners 2b, 3b, 4b are higher during heating, The air conditioners 2a, 3a, 4a are set to the lowest. On the contrary, at the time of cooling, the priority order of the air conditioners 2a, 3a, 4a is the highest, then the air conditioners 2b, 3b, 4b are made higher, and the air conditioners 2c, 3c, 4c are made the lowest.
[0013]
Next, when the sun is in the direction of the sun position 9b, the sunlight from the sun is in the direction of sunlight 10b, and the temperature rise due to the sunlight in the building 1 becomes higher toward the position of the sun 9b. Accordingly, the priority order of demand control such as stop control of the air conditioner or reduction control of the capacity is the highest in the air conditioners 4a, 4b, and 4c, and then the air conditioners 3a, 3b, and 3c are increased during heating, The air conditioners 2a, 2b, and 2c are set to the lowest. On the contrary, at the time of cooling, the priority order of the air conditioners 2a, 2b and 2c is the highest, then the air conditioners 3a, 3b and 3c are made higher, and the air conditioners 4a, 4b and 4c are made the lowest.
[0014]
Next, when the sun is in the direction of the sun position 9c, the sunlight from the sun is in the direction of sunlight 10c, and the temperature rise due to the sunlight in the building 1 is higher toward the position of the sun 9c. Accordingly, the priority order of demand control such as stop control of the air conditioner or reduction control of the capacity is the highest in the air conditioners 2a, 3a, 4a, and then the air conditioners 2b, 3b, 4b are high during heating, The air conditioners 2c, 3c, 4c are set to the lowest. On the contrary, at the time of cooling, the priority order of the air conditioners 2c, 3c, and 4c is the highest, then the air conditioners 2b, 3b, and 4b are made higher, and the air conditioners 2a, 3a, and 4a are made the lowest.
[0015]
Therefore, according to the first embodiment, the temperature position difference or temperature in the building due to demand control and sunshine is determined in order to determine the demand priority in consideration of the rise and change of the temperature in the building due to sunshine by detecting the position of the sun. Change can be reduced.
[0016]
Embodiment 2. FIG.
FIG. 3 is a configuration diagram of a demand control device for an air conditioner according to Embodiment 2 of the present invention. The air conditioner demand control apparatus according to the second embodiment shown in FIG. 3 differs from the air conditioner demand control apparatus according to the first embodiment shown in FIG. Outer wall surface temperature detecting means 11a to 11c for detecting the wall surface temperature are provided, and the priority order determining means 6 is configured to detect the outer wall surface temperature when the total electric power detected by the wattmeter 5 exceeds a preset reference value. Based on the information detected by the detection means 11a to 11c, the priority order of the air conditioners to be demand controlled is determined.
[0017]
In the configuration as described above, the outer wall temperature of the building 1 and the priority order of demand control of the air conditioner will be described. FIG. 4 shows the building 1, air conditioners 2a to 2c, 3a to 3c, 4a to 4c, sunshine directions 10a to 10b, and outer wall surface temperature detecting means 11a to 11c. In FIG. 4, when the sunlight from the sun is in the direction 10a of sunlight, the temperature rise due to sunlight of the outer wall temperature of the building 1 becomes higher toward the direction of sunlight 10a. Therefore, when the temperature detected by the outer wall surface temperature detecting means 11a is higher than the temperature detected by the outer wall surface temperature detecting means 11b, 11c attached to the other wall surface of the building 1, the air conditioner is controlled to stop or The priority of demand control such as lowering the capacity is the highest in the air conditioners 2c, 3c, 4c, the highest in the air conditioners 2b, 3b, 4b, and the highest in the air conditioners 2a, 3a, 4a. make low. On the contrary, at the time of cooling, the priority order of the air conditioners 2a, 3a, 4a is the highest, then the air conditioners 2b, 3b, 4b are made higher, and the air conditioners 2c, 3c, 4c are made the lowest.
[0018]
Next, when the sunshine from the sun is in the sunshine direction 10b, the temperature rise due to the sunshine of the outer wall temperature of the building 1 becomes higher toward the sunshine direction 10b side. Therefore, when the temperature detected by the outer wall surface temperature detecting means 11b is higher than the temperature detected by the outer wall surface temperature detecting means 11a, 11c attached to the other wall surface of the building 1, the air conditioner is controlled to stop or The priority of demand control such as lowering the capability is the highest in the air conditioners 4a, 4b and 4c, and then the highest in the air conditioners 3a, 3b and 3c, and the highest in the air conditioners 2a, 2b and 2c. make low. On the contrary, at the time of cooling, the priority order of the air conditioners 2a, 2b and 2c is the highest, then the air conditioners 3a, 3b and 3c are made higher, and the air conditioners 4a, 4b and 4c are made the lowest.
[0019]
Next, when the sunshine from the sun is in the sunshine direction 10c, the temperature rise due to the sunshine of the outer wall temperature of the building 1 becomes higher toward the sunshine direction 10c side. Therefore, when the temperature detected by the outer wall surface temperature detecting means 11c is higher than the temperature detected by the outer wall surface temperature detecting means 11a, 11b attached to the other wall surface of the building 1, the air conditioner is controlled to stop or The priority of demand control such as lowering the capability is the highest in the air conditioners 2a, 3a, 4a, then the highest in the air conditioners 2b, 3b, 4b, and the highest in the air conditioners 2c, 3c, 4c. make low. On the contrary, at the time of cooling, the priority order of the air conditioners 2c, 3c, and 4c is the highest, then the air conditioners 2b, 3b, and 4b are made higher, and the air conditioners 2a, 3a, and 4a are made the lowest.
[0020]
Therefore, according to the second embodiment, the temperature of the outer wall of the building is detected, and the priority order of demand considering the rise and change of the temperature in the building due to sunshine is determined. Temperature change can be reduced.
[0021]
Embodiment 3 FIG.
FIG. 5 is a configuration diagram of a demand control device for an air conditioner according to Embodiment 3 of the present invention. The air conditioner demand control apparatus according to the third embodiment shown in FIG. 5 differs from the air conditioner demand control apparatus according to the first embodiment shown in FIG. 2c, 3a-3c, 4a-4c are provided with air conditioner failure detection means 12 for detecting failure, and priority order determination means 6 has a total power consumption detected by wattmeter 5 exceeding a preset reference value. In this case, the priority order of the air conditioners to be demand controlled is determined based on the information detected by the air conditioner failure detecting means 12.
[0022]
In the above configuration, the priority order of demand control when there is an air conditioner that cannot be operated due to a failure or the like will be described. FIG. 6 shows the building 1 and the air conditioners 2a to 2c, 3a to 3c, 4b and 4c, the air conditioner failure detection means 12, and the failed air conditioner 13. In FIG. 6, when the air conditioner failure detecting means 12 detects that the failed air conditioner 13 cannot be operated, the priority order of demand control such as stop control of the air conditioner or control of lowering the capacity is given to the failed air conditioner. The air conditioners 3a, 3b, 4b adjacent to 13 are made the lowest.
[0023]
Therefore, according to the third embodiment, an air conditioner that cannot be operated due to a failure or the like is detected, and the other air conditioner that is installed in the same area as the air conditioner and supplements the air conditioner is stopped or the ability is reduced. Since the priority order of demand is determined so as not to occur, the temperature difference or temperature change in the building due to demand control and stoppage of the air conditioner due to failure or the like can be reduced.
[0024]
【The invention's effect】
As described above, according to the present invention, it is possible to limit the power consumption of the air conditioner without causing discomfort by reducing the temperature change or temperature difference during demand control.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a demand control device for an air conditioner according to Embodiment 1 of the present invention.
FIG. 2 is a diagram for explaining a demand control priority order according to the position of the sun.
FIG. 3 is a configuration diagram of a demand control device for an air conditioner according to Embodiment 2 of the present invention.
FIG. 4 is a diagram for explaining the priority order of demand control by the outer wall surface temperature detecting means.
FIG. 5 is a configuration diagram of a demand control device for an air conditioner according to Embodiment 3 of the present invention.
FIG. 6 is a diagram for explaining the priority order of demand control when there is an air conditioner that cannot be operated due to a failure or the like.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Building, 2a-2c Air conditioner, 3a-3c Air conditioner, 4a-4c Air conditioner, 5 Wattmeter, 6 Priority determination means, 7 Solar position detection means, 8 Air conditioner control means, 9a-9c Sun position, 10a to 10c Direction of sunshine, 11a to 11c Outer wall surface temperature detecting means, 12 Air conditioner failure detecting means, 13 Air conditioner having failed.

Claims (1)

In an air conditioner demand control device that limits power consumption when the total power consumption of multiple air conditioners installed in the same building exceeds a preset reference value,
A power meter for detecting the total power consumption of the plurality of air conditioners;
Air conditioner failure detection means for detecting failure of the plurality of air conditioners;
When the total electric power detected by the power meter exceeds a preset reference value , the lowest priority order of the air conditioners adjacent to the failed air conditioner is based on the information detected by the air conditioner failure detection means. and priority determining means for determining the priority of the demand control subject to the air conditioner so that,
An air conditioner demand control device comprising: air conditioner control means for performing stop control or capacity reduction control of the air conditioner according to priority order information from the priority order determining means.

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