JP2913584B2 - Air conditioner refrigerator demand control device with variable set temperature control - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application field] Electricity is supplied from a power company and the actual amount system under the electricity tariff system (the average of the amount of electric power every 30 minutes is recorded and the maximum value (hereinafter referred to as the demand value) is An electricity rate is collected by a system in which a basic electricity rate is calculated based on a demand value that is a maximum value of the electric power for 30 minutes, and the electricity rate can be used by an electricity consumer who operates an air conditioner or a refrigerator driven by an electric motor.

[0002]

[Prior art]

In an air conditioner, an administrator sets an absolute cooling control set temperature during cooling, and sets an absolute heating control set temperature during heating (hereinafter, both absolute control set temperatures are referred to as absolute set temperatures). When the temperature of the place falls below this absolute set temperature, part or all of the air conditioner is automatically stopped during cooling, and part or all of the air conditioner is automatically restarted during heating, and If the temperature of the air-conditioned location rises above this absolute set temperature, part or all of the air conditioner is automatically restarted during cooling, and part or all of the air conditioner is automatically stopped during heating The temperature of the place to be air-conditioned is maintained within a certain range so that the comfort of the person to be air-conditioned is maintained. However, when such an air conditioner is demand-controlled, it is forcibly shut off for a certain period of time when peak power is generated, and the above-mentioned absolute set temperature is ignored, and the absolute cooling control set temperature is exceeded during the air conditioner shut-off period during cooling. The temperature rise phenomenon and the temperature drop phenomenon when the temperature was below the absolute heating control set temperature occurred during heating, and the comfort of the air-conditioned person decreased.

[0004] The refrigerator sets an absolute refrigeration control set temperature by an administrator, and when the temperature of the place to be frozen falls below the absolute refrigeration control set temperature, automatically stops part or all of the refrigerator. When the temperature rises above the absolute refrigeration control set temperature, part or all of the refrigerator is automatically restarted, and the temperature of the place to be frozen and the temperature of the material to be frozen are kept within a certain range. I have. However, when such a refrigerator is demand-controlled, it is forcibly shut off for a certain period of time when peak power is generated, and the above-mentioned absolute refrigeration control set temperature is ignored and the temperature rise exceeding the absolute refrigeration control set temperature during the chiller shutdown period. Symptoms occur,
There is a high possibility that the temperature will exceed the freezing control temperature of the material to be frozen, and there have been concerns about quality control problems.

[0005]

[Problems to be solved by the invention]

When the air conditioner is shut off by the demand control, the time zone in which the air conditioner is shut off and the time zone in which the air conditioner is most needed generally tend to overlap, and by stopping the air conditioner in that time zone, cooling is performed. The temperature rise phenomenon that exceeds the absolute cooling control set temperature of the place to be air-conditioned at the time, and the temperature drop phenomenon that falls below the absolute heating control set temperature at the time of heating reduces the comfort level, which is the purpose for the air-conditioned person. However, since it is often avoided to select an air conditioner as a device to be controlled by the demand control, the temperature rise exceeding the absolute cooling control set temperature and the heating during the cooling even during the demand control is issued. It is an object of the present invention to try to avoid the temperature drop below the absolute heating control set temperature as much as possible.

When the refrigerator is shut down by demand control, the time zone in which the refrigerator is shut off and the time zone in which the operation of the refrigerator is most required generally tend to overlap, and by stopping the refrigerator in that time zone, Since the absolute refrigeration control set temperature of the place to be frozen or the refrigeration management temperature of the frozen object may be exceeded, it is therefore an object of the present invention to make demand control possible while reducing such defects as much as possible. This is the problem we are trying to solve.

[0008]

[Means for Solving the Problems]

When the demand control of the air conditioner is performed, the demand control issuance time and the issuance period are predicted by measuring and recording the demand control data up to the day before and the environmental data of the air-conditioned place and learning calculation,
Even if the air conditioner is stopped for the prediction time at the prediction time, the temperature of the air-conditioned place is adjusted so that it does not exceed the absolute cooling control set temperature during cooling and does not drop below the absolute heating control set temperature during heating. In order to calculate the amount of heat to be subtracted or added and to delete or add the amount of heat before issuing the demand control, substitute the cooling capacity or heating capacity of the air conditioner into the calculation formula, How long before the expected time (hereinafter the period during cooling is called the period required for supercooling, and the period during heating is called the period required for overheating) and the time before that period (hereinafter the period for cooling is Cooling start time The time during heating is called the overheating start time, and how much the cooling control set temperature should be set during cooling (this set temperature will be referred to as Calculate how high the heating control set temperature should be set at the time of heating (this set temperature is hereinafter referred to as superheating set temperature). At the time of cooling, set the cooling control set temperature at the supercooling start time. At the time of heating, the heating control set temperature is changed to the overheating set temperature at the time of the start of overheating. The problem can be solved by the above means.

[0010] In the case of demand control of a refrigerator, the demand control onset time and onset period are predicted by measuring and recording the demand control data up to the previous day and the environmental data of the place to be frozen and learning operation, and the prediction period at the predicted time To calculate the amount of heat to be subtracted to adjust the temperature of the place to be frozen so that it does not exceed the absolute refrigeration control set temperature even if the refrigerator stops, and to delete that amount of heat before issuing the demand control. Substitutes the refrigerating capacity of the refrigerator into the calculation formula, and how long before the demand control issuance expected time (hereinafter referred to as the period required for over-freezing) and the time before that period (hereinafter referred to as the over-freezing start time) ) To calculate how low the refrigeration control set temperature should be set (this set temperature is hereinafter referred to as the super refrigeration set temperature) , To change the refrigeration control preset temperature over the freezing set temperature At a over-freezing start time. The problem can be solved by the above means.

[0011]

[Action]

When demand control of an air conditioner is performed by the apparatus of the present invention, the demand control issuance time and the issuance period are predicted, and the supercooling set temperature, the required period of supercooling, and the supercooling start time are used for cooling, and the overheating is used for heating. The set temperature, the required period of overheating, and the overheating start time are calculated. During cooling, the cooling control set temperature is changed to the supercooling set temperature at the supercooling start time, and during heating, the heating control set temperature is changed at the overheating start time. The temperature is changed to the superheat set temperature, so that before the actual demand control issuance predicted time, the air conditioner gradually cools down from the supercooling start time during cooling and the actual demand control is issued after the time when the actual demand control is issued. Even if the temperature rise phenomenon starts due to the stop, the temperature of the cooling target place during the demand control and until the end time is the case where the present invention device does not operate It is a low temperature compared to that of the same time,
During heating, the temperature of the heated area is gradually overheated from the start time of the overheating, and the temperature of the heated area is maintained during the demand control and until the end time even if the temperature starts to decrease due to the stop of the air conditioner after the time when the actual demand control is issued. The temperature is higher than that at the same time when the device of the present invention does not operate, and in each case, even if the air conditioner is demand-controlled, the comfort of the air-conditioned person is improved as compared with the case where the device of the present invention does not operate.

[0013] In the case where the refrigerator is demand-controlled by the apparatus of the present invention, the demand control issuance time issuance period is predicted, the set temperature for overfreezing, the required period for overfreezing, and the overfreezing start time are calculated. The temperature is changed to the subcooling set temperature, so that before the actual demand control issuance predicted time, the temperature of the frozen place is gradually supercooled, and after the time when the actual demand control is issued, the temperature rise phenomenon occurs due to the stoppage of the refrigerator. Even if it starts, the temperature of the place to be frozen is lower than that at the same time when the apparatus of the present invention does not operate during the demand control and until the end time, and even if the refrigerator is demand controlled, it exceeds the freezing management temperature of the frozen object. And the quality control problem is less likely to occur.

[0014]

FIG. 1 shows an embodiment during cooling when demand control of an air conditioner is performed. The present invention device (air conditioner refrigerator demand control device by variable set temperature control)
Reference numeral 10 denotes a demand value measurement device 9 installed in the electric substation 8 which constantly measures and records a demand value via a demand value signal communication cable 13, and outputs outside air temperature data from the outside air temperature sensor 3 to a cooling location temperature sensor 4. The temperature data of the cooled place 1 is obtained from the temperature sensor 5 and the humidity data of the cooled place 1 is transmitted from the humidity sensor 5 of the cooled place.
Measurement and recording via the computer, learning calculation and forecasting of demand control onset time and onset period, subcooling set temperature,
The supercooling required period and the supercooling start time are calculated. Then, the device of the present invention (air conditioner refrigerator demand control device by variable set temperature control) 10 reads the temperature of the cooled place 1 from the cooled place temperature sensor 4 from the supercooling start time calculated in this way, and When the temperature falls below the subcooling set temperature, the air conditioner (outdoor unit) 7 is devised to be stopped via the air conditioner control cable 12, so that the temperature of the place 1 to be cooled is set to the subcooling set temperature. The air conditioner (outdoor unit) 7 is continuously operated until the temperature is reduced to less than the predetermined value, and the air conditioner (indoor unit) 6 is supercooled through the air conditioner (indoor unit) 6. However, in this case, the set temperature already set by the set temperature controller 14 provided in the air conditioner (indoor unit) 6 (hereinafter, referred to as a controller set temperature) is higher than the subcooling set temperature, and the controller The set temperature has priority and the air conditioner (outdoor unit) 7
Of the air-conditioned person 2, the manager sets the controller set temperature to the sub-cooling set temperature or lower by the set temperature adjuster 14 attached to the air conditioner (indoor unit) 6 or continuous operation. Set to. As a result, the place to be cooled 1 is supercooled gradually from the supercooling start time to the supercooling required period, and even when the actual demand control is issued and the air conditioner is stopped, there is no or short time during which the absolute cooling control set temperature is exceeded. Demand control can be practiced while maintaining the comfort of the air-conditioned person 2. In addition, the cooling control set temperature is returned to the absolute cooling control set temperature during periods other than the required period for supercooling.

[0015]

【The invention's effect】

When an air conditioner is selected as an electric load to be demand-controlled, the temperature of a place to be cooled during demand control is set to be lower than that in a case where the apparatus of the present invention is not used at the time of cooling. It is possible to perform demand control while maintaining the temperature of the place to be heated during the demand control is higher than that when the apparatus of the present invention is not used, thereby enabling the demand without reducing the comfort of the air-conditioned person. Control can be implemented, leading to energy savings and reduction of electricity rates.

In the case where a refrigerator is selected as a demand control target electric load, it is possible to perform demand control while keeping the temperature of the place to be frozen during demand control is lower than that when the apparatus of the present invention is not used, As a result, demand control can be performed while reducing the excess time of the cooling management temperature of the object to be frozen, leading to energy saving and reduction of the electricity rate.

[Brief description of the drawings]

FIG. 1 shows an embodiment during cooling when demand control of an air conditioner is performed.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Cooling place 2 Air conditioner 3 Outside air temperature sensor 4 Cooling place temperature sensor 5 Cooling place humidity sensor 6 Air conditioner (indoor unit) 7 Air conditioner (outdoor unit) 8 Electric substation equipment 9 Demand value measuring device 10 Invention device (air conditioner refrigerator demand control device by variable set temperature control) 11 Environmental data communication cable 12 Air conditioner control cable 13 Demand value signal communication cable 14 Set temperature controller

Claims (2)

(57) [Claims] When performing a control (hereinafter referred to as demand control) for suppressing a part of an electric load when a peak power equal to or more than a certain value is generated (hereinafter referred to as demand control), a demand control target electric load (an electric load to be cut off). When an air conditioner (hereinafter referred to as an air conditioner) is selected, at the time of cooling, the absolute cooling control set temperature due to a rise in the temperature of the cooled place due to its shutoff (setting of the air conditioner at the cooled place set in advance by the administrator) The temperature refers to the temperature at which the comfort level of the person to be cooled is reduced if this temperature is exceeded. Excessive time. At the time of heating, the absolute heating control set temperature due to the temperature drop due to the shutoff. The temperature at which the set temperature of the machine is reduced. If the temperature falls below this temperature, the comfort level of the person to be heated decreases.)
Data such as electric load fluctuation curve by day of the day (hereinafter referred to as daily load curve), demand control issuance time and issuance period (hereinafter referred to as demand control data), and the temperature of the place to be cooled or heated at that time Data such as humidity and outside air temperature (hereinafter referred to as environmental data) is measured and recorded, and learning calculation is performed to predict at what time the next day and for how long the demand control will be issued for a certain period of time (demand control data). The cooling control set temperature is automatically changed in advance (for example, 30 minutes before) and the temperature is set to a value lower than the cooling control set temperature during cooling. Set the heating control temperature during heating (the temperature at which the air conditioner operates automatically when the temperature falls below this temperature during heating) Highly fluctuate and adjust the sub-cooling location to super-cooling and the super-heating location in the period until demand control is actually issued. Absolute cooling by temperature rise during cooling after the air conditioner is shut off by demand control issuance. The set temperature is designed so that demand control can be performed while maintaining the comfort level of the air-conditioned person by extending the time to reach the control set temperature and the time to reach the absolute heating control set temperature due to temperature drop during heating. Air conditioner refrigerator demand control device with variable control. When a refrigerator is selected as an electric load to be controlled (interrupted electric load) at the time of performing the demand control, an absolute refrigeration control set temperature due to a temperature rise due to the interruption of the refrigeration location (preliminary administrator The temperature of the refrigerator at the place to be frozen, which is set by the above, means that if the temperature exceeds the control temperature of the frozen product, there will be a problem with the quality of the frozen product.) Demand control to eliminate or shorten the excess time Data and environmental data are measured and recorded, and learning calculation is performed. The next day and at what time and for how long the demand control is issued, and for a certain period of time from the predicted execution time (learning calculation based on demand control data and environmental data is determined. Refrigeration control set temperature automatically (for example, 30 minutes before) The temperature at which the refrigerator operates is changed to a low level, and the place to be frozen is adjusted to supercool until the demand control is actually issued. Air conditioner refrigerator demand control device with variable set temperature control designed to extend the time required to reach and to minimize the excess of the refrigeration control temperature of the frozen object while minimizing excess of the refrigeration temperature.