JP4884419B2 - Cooker - Google Patents

Description

The present invention relates to a heating cooker that can be used in accordance with the power environment to be installed.

  In general, in each dwelling unit, power supplied from an electric power company is branched and supplied to circuits in each room via a distribution board. The distribution board is provided with a circuit breaker that performs power restriction related to contract power with the main power company or the electric power company, and the unit can be used safely by being restricted by the circuit breaker.

  On the other hand, the heating cooker as one of the electrical equipment used in each dwelling unit has been widely spread due to its safety and convenience, but consumes a large amount of power when cooking with strong thermal power, Depending on the capacity of the circuit breaker, when other electric devices are used at the same time, the capacity of the circuit breaker may be exceeded and the circuit breaker may be turned off.

In addition, when the total power consumption used in the dwelling unit exceeds the maximum amount of power that can be used in the dwelling unit, a notice is given to each electric device to suppress the power consumption according to the preset priority, A power demand control system has been proposed that has a function of automatically returning when the capacity shortage is resolved (see, for example, Patent Document 1).
JP-A-5-164376

  In the technique of Patent Document 1, even when the shortage of capacity is resolved, for example, when the notification of the lack of capacity is not given to the electric device due to a failure that occurs in the system, the electric device uses the suppressed demand power. Driving will continue. If this electrical device is a heating cooker, there is a problem that cooking is continued in a state where cooking power is substantially impossible when the suppressed demand power is a particularly small value.

  In this way, in the electrical equipment demand control system, the situation where appropriate demand control according to the current power usage situation in the dwelling unit cannot be performed due to a failure occurring in the system should be avoided as much as possible. Is an important issue.

The present invention has been made in view of these circumstances, even when the electrical device demand control system fails, the cooking device without generating the problem of state power headroom is suppressed continues The purpose is to provide.

The heating cooker according to the present invention includes one or more heating means for heating an object to be heated and a rated power value that stores a rated power value as an upper limit value of the total power consumed by the entire heating cooker. Storage means, demand power receiving means for receiving a demand power value determined according to the power environment in which the heating cooker is used, from the demand control system; storing the received demand power value; When the demand power storage means that is updated each time the demand power value is received and the demand power storage means is updated, either or both of the power values stored in the demand power storage means and the rated power storage means are set. A control upper limit power determining means for determining a control upper limit power value based on the control upper limit power, and a control means for controlling the heating output of the heating means within the range of the determined control upper limit power. Means, while the demand power storage means is updated, among the demand power value and the rated power value, and determines the smaller as the control upper limit power value, interrupted reception demand power value from the demand control system demand When the power storage means is not updated for a predetermined time or more, the rated power value is determined as the control upper limit power value.

  According to the cooking device of the present invention, when the demand power storage means is not updated for a predetermined time or more, the rated power value is determined as the control upper limit power value, so that usable power (control upper limit power) is suppressed. Even if a failure occurs in the system when the system is in the active state, the suppression state can be prevented from continuing.

Embodiment 1 FIG.
FIG. 1 is a block diagram illustrating a configuration of an electrical equipment demand control system including a cooking device according to Embodiment 1 of the present invention.
The electric equipment demand control system 1 is disposed in each dwelling unit, for example, and includes a demand control device 10, communicates with various electric equipments 20 (20 a, 20 b, 20 c) via the communication medium 2, and It controls the amount of power used by the device. Among the electric devices 20, 20 a is a cooking device, and hereinafter referred to as a cooking device 20 a as distinguished from other electric devices 20 as necessary. The electrical equipment demand control system 1 further includes a measuring device 3 that measures the power consumption of the entire dwelling unit, and is connected to the demand control device 10 via the communication medium 2.

  The measuring device 3 is connected to a distribution board 30 to be described later by a measurement wiring 4, and a measuring means 3a for measuring the total power consumption of the entire dwelling unit at a short interval such as several hundred milliseconds, and the entire measuring device 3 And a control means 3b for controlling. The control means 3b includes a CPU, a RAM, and a ROM (all not shown) that stores various programs for operating the measuring device 3. Then, the measurement result measured by the measuring means 3a is notified to the demand control device 10 via the communication medium 2 at an appropriate timing by a control program written in advance in the ROM. The ROM stores a maximum amount of power input in advance from an input unit (not shown). The maximum amount of power is the maximum amount of power that can be used according to the power environment of the unit. Specifically, the maximum amount of power that can be used for the power system of the unit is the capacity of the current limiter or the power company. It is the maximum amount of power that can be used in the dwelling unit, determined based on the contract. In addition, the total electric power consumption of the whole dwelling unit is changing constantly by various electric equipments 20 operating.

  The demand control device 10 includes a demand control unit 11 that controls the entire demand control device 10 and a demand power transmission unit 12.

  The demand control means 11 is composed of, for example, a microcomputer, and includes a CPU, a RAM, and a ROM (all not shown) for storing various programs for operating the electrical equipment demand control system 1. The entire demand control system is controlled by a demand control program written in advance in the ROM. The ROM stores the maximum power amount (maximum usable power amount according to the power environment of the dwelling unit) previously input from an input unit (not shown), and the maximum power storage unit 13 functions. It is structured.

  Further, the demand control means 11 calculates the total power in the dwelling unit based on various information such as the total power consumption measured by the measuring device 3, the maximum power consumption for each dwelling unit, and the priority order given in advance to each electric device 20. The demand power of each electrical device 20 is determined so that the power consumption does not exceed the maximum power amount, and a process of notifying each electrical device 20 via the communication medium 2 from the demand power transmission unit 12 is performed. In the present invention, the method for determining the demand power to be distributed to each electrical device 20 may be determined so that at least the total power consumption does not exceed the maximum power amount. Is not particularly limited, and any method can be adopted.

  Each dwelling unit is supplied with electric power from an electric power company (from a single electric power system) through a light line 5, and a plurality of dwelling units in the dwelling unit are connected via a current limiting circuit breaker 31 provided in the distribution board 30. Electric power is supplied to the electric equipment 20 via the branched light wires 32a and 32b. Further, in the dwelling unit, when the total power consumption of the entire dwelling unit exceeds the maximum power consumption due to the simultaneous operation of the electric devices 20, the circuit breaker 31 is generally activated, Supply is cut off.

  However, in the electrical equipment demand control system 1 of this example, the total power consumption of the whole dwelling unit is measured by the measuring device 3, and the current total power consumption is compared with the maximum electric power that can be used in this dwelling unit. When the current total power consumption exceeds the maximum power amount as shown in FIG. 4, the demand control means 11 controls the capacity of the heating cooker 20a and the individual electric devices 20b and 20c installed in the dwelling unit (demand Control) to prevent the circuit breaker 31 from operating.

FIG. 2 is a block diagram showing an electrical configuration of the heating cooker 20a of FIG. FIG. 2 shows only main components, and the functions and means that are naturally provided in the heating cooker 20a such as the display unit and the power supply unit are omitted because they do not have special features in the present invention. Yes.
The cooking device 20a includes one or more heating means 40 for heating an object to be heated, an operation means 41 for receiving an operation from a user, a demand power receiving means 42, a demand power storage means 43, a rating The power storage means 44, the control upper limit power determination means 45, and a control means 46 that includes a microcomputer or the like and controls the entire cooking device 20a are provided.

  The demand power receiving unit 42 is a unit that receives a demand power value transmitted from the demand control device 10. The demand power storage means 43 is a means for storing the demand power value received by the demand power reception means 42. The demand power storage unit 43 is configured to be updated each time the demand power reception unit 42 receives a demand power value.

  The rated power storage means 44 is a means for storing the maximum amount of power (rated power value) that can be used by the cooking device 20a. Generally, the electric circuit to which the heating cooker 20a is connected is configured with 200V, 20A, and 30A, and an electric energy of 6000 W or less is set. It may be possible to select and set from a plurality of values so that it can be optimized according to the environment in which the cooking device 20a is used. However, once the value is set, the value is maintained.

  The control upper limit power determining means 45 is a means for determining a control upper limit power value based on one or both of the power values stored in the demand power storage means 43 and the rated power storage means 44 and notifying the control means 46 of the control upper limit power value. It is. Details of the method of determining the control upper limit power value in the control upper limit power determining means 45 will be described later.

  The control means 46 performs the heating power control of the cooking device 20a within the range of the control upper limit power value determined by the control upper limit power determination means 45. That is, when realizing the operation content from the operation means 41, when the upper limit power value is exceeded, the control means 46 performs power control of the heating cooker 20a within the range of the upper limit power value.

Next, the operation of the electrical equipment demand control system 1 configured as described above will be described with reference to FIGS. Here, in particular, an example of demand control of the cooking device 20a will be described.
When the use of the heating cooker 20a is started by the user, the control means 46 of the heating cooker 20a first reads the rated power value from the rated power storage means 44 as the initial value at the start of operation, and this is the control upper limit. The heating means 40 is controlled as electric power. On the other hand, the measuring device 3 measures the total power consumption of the entire dwelling unit at short intervals such as several hundred milliseconds, and outputs the measurement result to the demand control device 10 at an appropriate timing.

  In the demand control device 10, the demand control means 11 exceeds the maximum power for the entire dwelling unit based on the total power consumption from the measuring device 3, the maximum power consumption for each dwelling unit, and the priority order given in advance to each electric device 20. The demand power of each electric device 20 is determined so as not to be transmitted, and is transmitted from the demand power transmission means 12 to the cooking device 20a via the communication medium 2. In the demand control device 10, the total power usage amount received by the demand control means 11 from the measuring device 3 changes depending on the usage status of the heating cooker 20 a, the power off of other devices, the change of the operation state, etc. The demand power determined by the demand control means 11 is a demand power according to the current total power consumption of the entire dwelling unit.

  The demand power value transmitted from the demand power transmission unit 12 of the demand control device 10 to the cooking device 20a is received by the demand power reception unit 42 of the cooking device 20a and stored in the demand power storage unit 43.

  Note that the demand power changes depending on the total power consumption in the dwelling unit as described above, and the demand power storage unit 43 is sequentially updated every minute, for example. And control upper limit electric power determination means 45 of cooking-by-heating machine 20a has determined control upper limit electric power using the updated new demand electric power value. Therefore, even if the demand power value is suppressed to a low value at a certain timing, there is a surplus in the amount of power used by turning off the power of other devices, and the demand power allocated to the cooking device 20a increases. Operation with the increased demand power becomes possible.

  Below, the detailed flow of the process of the control upper limit electric power determination means 45 which is one of the characteristic parts of this invention is demonstrated.

FIG. 3 is a flowchart showing the flow of processing of the control upper limit power determining means 45 of FIG. The processing of this flowchart shows processing that is called and performed at every calculation / determination timing of the control upper limit power.
The control upper limit power determining means 45 checks whether or not the demand power storage means 43 is updated (S1), and if it is updated, the demand power value stored in the demand power storage means 43 and the rated power storage means 44 are checked. The stored rated power value is compared (S2), and the lower one is determined as the control upper limit power (S3). For example, when the rated power value is 4000 W and the demand power value is 2000 W, the heating means 40 is controlled with a control upper limit power of 2000 W. At this time, when the designated heating power cannot be realized with the control upper limit power, the heating means 40 is controlled to a heating power limited to the indicated heating power.

  If it is determined in step S1 that the demand power storage means 43 has not been updated, it is checked whether or not a predetermined time has passed in the non-updated period (S4). If the predetermined time has not elapsed, the upper limit power value is determined by the same process as step S2. That is, while the demand power storage means 43 is not updated, the demand power value stored last in the demand power storage means 43 is used and the demand power value and the rated power value are calculated while the predetermined time has not elapsed. And the lower one is determined as the control upper limit power.

  However, when the non-update period continues for a predetermined time, the rated power value is determined as the control upper limit power value (S5). Here, the case where the non-update period continues for a predetermined time is a failure of the communication medium 2 (a radio wave failure in the case of wireless, a wire breakage in the case of wire, a noise failure, etc.), the measuring device 3 or the demand control means. In this case, no new demand power value is received and the demand power storage means 43 is not updated on the cooking device 20a side. At this time, the value of the demand power storage means 43 is not a demand power value based on the current total power usage, but is already a value before the predetermined time, and the current total power usage has changed. For this reason, the value of the demand power storage means 43 is not used, and the value of the rated power value is determined as the control upper limit power as it is.

  Thermal power restriction control is performed so that the total amount of power used by the heating means 40 is less than or equal to the control upper limit power determined as described above.

  When the failure of the electrical equipment demand control system 1 is resolved, the demand power is received again by the demand power receiving means 42, and the demand power storage means 43 is updated, the determination at step S2 is performed, and the control upper limit power To decide. Thereby, it becomes possible to perform power control with an optimum limit value corresponding to the current power state of the dwelling unit.

  Here, to explain with a specific example, when the above-mentioned failure or the like occurs after the cooking device 20a receives a demand power value of 2000 W, which is the power suppressed from normal (for example, 4000 W), the demand power is not used. If the value is kept at the control upper limit power, the cooking device 20a is used in a restricted state, which causes inconvenience. In addition, the fact that the demand power storage means 43 is not updated means that even if the total power consumption of the entire dwelling unit has already been reduced and it has changed to a state where it is not necessary to carry out thermal power restriction on the heating cooker 20a, Since it cannot be grasped on the heating cooker 20a side, the suppressed state continues.

  On the other hand, in the first embodiment, when the demand power storage means 43 is not updated for a predetermined time, for example, 10 minutes or more, the control upper limit power determination means 45 uses the demand power value in the above-described control. Without determining the rated power value as the control upper limit power value, the conventional inconvenience of continuing the operation with the suppressed demand power can be solved.

  In addition, when the demand power value is larger than the rated power value, priority is given to the value of the rated power value, so it becomes possible to use the heating cooker 20a within the set rated power range. Optimal capacity control is possible in the dwelling unit.

  By the way, in the first embodiment, when the demand power storage means 43 is not updated for a predetermined time, for example, 10 minutes or more, the rated power value is determined as the control upper limit power value, but it is determined by the following two algorithms. It may be.

(Algorithm 1)
Using the rated power value as a target value, the control upper limit power is raised stepwise from the demand power value currently stored in the demand power storage means 43 to the rated power value in a stepwise manner with a predetermined power width.
An example will be described in which a failure in which the demand power storage unit 43 is not updated occurs when the rated power value is 4000 W and the demand power value is 2000 W. When the predetermined power width and the predetermined duration are each determined to be 500 W for 15 minutes, the upper limit power is not suddenly returned from 2000 W to 4000 W, but the first 15 minutes is set to 2000 W, and then 2500 W is continuously applied for 15 minutes. Thereafter, similarly, the power is set to 3000 W, 3500 W every 15 minutes, and finally to the rated power of 4000 W.

  By performing such control, it is possible to reduce the possibility that the breaker 31 will operate because the total power usage of the entire dwelling unit exceeds the maximum power by immediately releasing the restriction and raising it to the rated power. It becomes.

(Algorithm 2)
A predetermined ratio of the rated power is set as the control upper limit power.
The predetermined ratio is, for example, a value such as 50% and is determined with reference to the maximum usable power amount of the dwelling unit. As a specific example, a case where a failure in which the demand power storage unit 43 is not updated occurs in the state where the rated power value is 4000 W and the demand power value is 2000 W, for example, as described above will be described. When the maximum usable power of this dwelling unit is 4000 W, when the rated power is released to 4000 W as described above, the maximum usable power may be easily exceeded when the other electric devices 20 b and 20 c are used. Therefore, in order to enable the use of the other electric devices 20b and 20c, 50% of 2000 W is set as the control upper limit power.

  By performing such control, it is possible to reduce the possibility that the total power consumption of the entire dwelling unit exceeds the maximum power and the circuit breaker 31 is activated by immediately releasing the restriction.

  Further, in each of the algorithm 1 and the algorithm 2, when the control upper limit power is set to a value other than the demand power, when the demand power storage unit 43 is newly updated, the newly updated demand power value is set to the control upper limit power. The power value. Thereby, it becomes possible to control with the optimal limit value corresponding to the present state of this dwelling unit.

  By the way, in each dwelling unit, the contract amperage value is determined with the electric power company. Therefore, for example, when the contract is 60A, by setting the maximum power amount corresponding to 40A in the demand control device 10, it is possible to realize a power environment in which the total power consumption is suppressed. By using the electric appliance demand control system 1 in such a usage form, it is possible to contribute to energy saving.

Embodiment 2. FIG.
The second embodiment relates to the update timing of the control upper limit power value.

  Since the structure of the heating cooker 20a of Embodiment 2 and the electric equipment demand control system 1 including this heating cooker 20a is the same as that of FIG.1 and FIG.2, illustration is abbreviate | omitted. In the following, only the parts of the second embodiment that are different from those of the first embodiment will be described, and description of other overlapping parts will be omitted.

When the demand power value (<rated power value) is frequently updated and the control upper limit power value is also frequently updated, there are the following problems.
In general, the heating power setting of the heating cooker 20a is a stepwise setting every several hundred W, and in such a configuration, when the power amount of the whole dwelling unit is reduced by 50 W, the demand power and the control upper limit follow this. Even if the power is corrected, the available firepower does not change. Moreover, if the fluctuation | variation of about 200W frequently arises in the control upper limit electric power with respect to the cooking-by-heating machine 20a, the level of usable thermal power will go up or down, and it cannot secure sustainable thermal power more than fixed time, On the contrary, it is inconvenient for the user. Thus, it may not be preferable to frequently update the control upper limit power.

  In order to cope with such a problem, the control upper limit power determining means 45 of the heating cooker 20a of the second embodiment is such that the updated demand power value of the demand power storage means 43 is not less than a predetermined power value such as 500 W, for example. The control upper limit power value is updated to a new demand power value only when there is a change (in this case, an increase) and the thermal power can be maintained continuously.

FIG. 4 is a flowchart showing a flow of processing of the control upper limit power determining unit 45 in the electric equipment demand control system 1 of the second embodiment. In FIG. 4, the same processing parts as those in FIG.
As shown in FIG. 4, when the demand power storage unit 43 is updated (S1), the control upper limit power determination unit 45 of the second embodiment has the demand power value stored in the demand power storage unit 43 and the rated power. The rated power value stored in the storage means 44 is compared (S2). If the demand power value is less than or equal to the rated power value, then it is checked whether the updated demand power value has changed by a predetermined amount or more from the previous demand power value (S2a). And when changing more than predetermined electric energy, the demand power value after the update is determined to be a control upper limit electric power value. On the other hand, when the amount of change in the demand power value from the previous time is less than the predetermined power amount, the control upper limit power value is not determined. In this case, since the control upper limit power value is not updated, the control means 46 of the heating cooker 20a performs the heating power control of the heating means 40 by continuously using the control upper limit power value so far.

  Thus, according to the second embodiment, the amount of change in the demand power value is checked, and the control upper limit power value is updated to the new demand power value only when the amount of change is greater than or equal to the predetermined power amount. Unnecessary thermal power fluctuations can be suppressed, and stable cooking becomes possible.

Embodiment 3 FIG.
The third embodiment is a method for determining a demand power value when the total power consumption of the entire dwelling unit is not properly input to the demand control means 11.

FIG. 5 is a block diagram illustrating a configuration of the electric appliance demand control system 1 including the heating cooker 20a according to the third embodiment. In FIG. 5, the same parts as those in FIG.
In the electrical equipment demand control system 1 according to the third embodiment, the electrical equipment 20d is not connected to the communication medium 2 unlike the electrical equipments 20a to 20c, and cannot be controlled by the demand control device 10. . However, it is assumed that the rated power value of the electric device 20d is input in advance from an input unit (not shown) and stored in the maximum power storage unit 13 of the demand control unit 11. In the following description, only the differences between the third embodiment and the first embodiment will be described, and the description of other overlapping parts will be omitted.

Next, the operation will be described.
When a failure occurs in the electrical equipment demand control system 1, it is conceivable that the measurement result of the measurement device 3, that is, the total power consumption of the entire dwelling unit is not properly input to the demand control device 10. The failure that occurs in the electrical equipment demand control system 1 specifically includes, for example, a failure in the communication medium 2 (such as a radio wave failure in the case of wireless, a disconnection in the case of wire, or a noise failure) or measurement. The case where a failure occurs in the measuring means 3a of the device 3 is applicable.

  Thus, when an appropriate measurement result is not input from the measurement device 3 to the demand control device 10 due to a failure in the electrical equipment demand control system 1, the demand control device 10 cannot calculate an appropriate demand power value. If the demand power value calculated here is extremely small power, the cooking device 20a may not be able to cook at all, and there is a possibility that restrictions that make life extremely inconvenient may continue. Conversely, if the demand power value calculated by the demand control device 10 is extremely large, the circuit breaker 31 may be activated. Therefore, in such a case, the demand control device 10 of this example determines the demand power so as to distribute the maximum power amount of the dwelling unit according to the characteristics of the heating cooker 20a and each of the electric appliances 20b to 20d. Is notified to the heating cooker 20a via the communication medium 2. The detection that the total power consumption is not properly input to the demand control means 11 can be performed by any method. For example, the measurement result is not input from the measuring device 3 within a certain period or received. What is necessary is just to detect that a measurement result is outside the preset range.

In the following, there are several methods of distribution.
(Distribution method 1)
It distributes in proportion to the rated power of each of the heating cooker 20a and the electric devices 20b to 20d connected to the electric light wires 32a and 32b.
(Distribution method 2)
Of the heating cooker 20a and the electric appliances 20b to 20d connected to the electric power lines 32a and 32b, the degree of influence on life is taken into consideration, and distribution is performed according to each rated power. For example, a power value sufficient for the operation is distributed to the cooking device 20a for preparing meals, the air conditioner for heating, and the like.
(Distribution method 3)
Depending on the rated capacity of the heating cooker 20a and each of the electric devices 20b to 20c, which reserves a certain percentage of the rated power of the electric device 20d that cannot control the capacity as an allocation to the electric device 20d, and the remaining electric energy can be controlled. Distribute. For example, the power consumption of essential equipment such as a refrigerator that does not perform capacity control is ensured.

It is also possible to combine one or more of the above methods.
By performing such distribution, the demand control device 10 can comfortably use each electric device 20 including the heating cooker 20a even when the current total power consumption cannot be properly acquired from the measurement device 3. It becomes. Moreover, it becomes possible to reduce possibility that the circuit breaker 31 will operate | move and the resident of the said dwelling unit will be able to use electricity more conveniently.

Embodiment 4 FIG.
The fourth embodiment relates to a notification timing at which the measurement result is notified from the measurement device 3 to the demand control device 10.

  Since the structure of the heating cooker 20a of Embodiment 4 and the electric equipment demand control system 1 containing this heating cooker 20a is the same as that of FIG.1 and FIG.2, it abbreviate | omits illustration.

  In the first embodiment, the measurement device 3 measures the measurement results at short intervals such as several hundred milliseconds by the measurement unit 3a and notifies the demand control device 10 of the measurement results at an appropriate timing. Notifying the control device 10 imposes a great network communication load on the communication medium 2. Therefore, when this network is used in common with other application functions (such as security) of the home system, there is a possibility that the execution of other applications may be disturbed.

  Therefore, in the measurement apparatus 3 according to the fourth embodiment, when the measurement result is notified to the demand control apparatus 10, the notification is performed with consideration given so as not to hinder the execution of other applications. This control of the notification timing is realized by the control means 3b of the measuring device 3. A specific example of the notification timing control method will be described below.

(Notification timing control method 1)
The measurement device 3 notifies the demand control device 10 of the measurement result when the power value changes by a predetermined power value or more than the previous measurement result.
For example, even if the total power consumption of the entire dwelling unit changes within a range of 100 W or less, it cannot be effectively used. That is, the change in the total power consumption within the range of 100 W or less has a small change width of the demand power value, so that it is not sufficient to start using a new device, and the air conditioner that performs the capacity control Even the household electric appliances that use large electric power such as the cooking device 20a and the heating cooker 20a are not affected so as to change the driving ability. Therefore, for example, no notification is given when there is no change over a predetermined power value, such as no notification when there is no change of 500 W or more.

(Notification timing control method 2)
The total power consumption of the entire dwelling unit is compared with a predetermined value (<maximum power consumption), and the notification frequency is adjusted according to the comparison result.
For example, when the current total power consumption is significantly smaller than a predetermined value and there is a large margin, detailed demand control is not necessary, so the frequency is notified low. Further, the notification frequency is lowered as the margin increases. Thereby, unnecessary communication can be suppressed and the load on the communication medium 2 can be reduced. On the other hand, if the specified value is exceeded, or if the excess exceeds 10%, 20%, etc., the total power usage of the entire dwelling unit will exceed the maximum power consumption and the possibility of turning off the circuit breaker 31 will increase. Therefore, the frequency is notified high according to the degree of excess, and the optimal demand power is notified to each electric device 20 in a shorter time. Thereby, fine demand control becomes possible so that the circuit breaker 31 is not turned off.

  By controlling the notification frequency of the measurement result notified from the measurement device 3 to the demand control device 10 by the method as described above, it is possible to prevent the network load of the communication medium 2 from increasing more than necessary. Further, the demand control device 10 may calculate and notify the demand power at the minimum necessary timing, and similarly, it is possible to provide the electrical equipment demand control system 1 that does not increase the network load more than necessary. Become.

  The cooking device and the electric appliance demand control system according to the present invention can be applied to a service that supports the use of an electric appliance that is comfortable for a user using a home network.

It is a block diagram which shows the structure of the electric equipment demand control system provided with the heating cooker in Embodiment 1 of this invention. It is a block diagram which shows the electric constitution of the heating cooker of FIG. It is a flowchart which shows the flow of a process of the control upper limit electric power determination means of FIG. 6 is a flowchart showing a flow of processing of control upper limit power determining means in the electric equipment demand control system of the second embodiment. It is a block diagram which shows the structure of the electric equipment demand control system containing the heating cooker of Embodiment 3. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Electrical equipment demand control system, 2 Communication medium, 3 Measurement apparatus, 3a Measurement means, 3b Control means, 4 Measurement wiring, 5 Electric light line, 10 Demand control apparatus, 11 Demand control means, 12 Demand power transmission means, 20 Electrical equipment , 20a Heating cooker, 20b to 20d Electric equipment, 30 Distribution board, 31 Circuit breaker, 32a, 32b Power line, 40 Heating means, 41 Operating means, 42 Demand power receiving means, 43 Demand power storage means, 44 Rated power Storage means, 45 control upper limit power determination means, 46 control means.

Claims (6)

One or more heating means for heating the article to be heated;
Rated power storage means for storing a rated power value as an upper limit value of the total amount of power consumed in the entire heating cooker,
Demand power receiving means for receiving, from the demand control system, a demand power value determined according to the power environment in which the heating cooker is used;
Demand power storage means for storing the received demand power value and updated each time the demand power reception means receives the demand power value;
When the demand power storage unit is updated, a control upper limit power determination unit that determines a control upper limit power value based on one or both of the power values stored in the demand power storage unit and the rated power storage unit When,
Control means for controlling the heating output of the heating means within the range of the determined control upper limit power,
The control upper limit power determining means determines the smaller one of the demand power value and the rated power value as the control upper limit power value while the demand power storage means is being updated, and from the demand control system When the demand power value is not received and the demand power storage unit is not updated for a predetermined time or more, the rated power value is determined as a control upper limit power value. The control upper power determining means, when said demand power storage unit is not updated for a predetermined time or more, before Symbol stepwise from demand power value currently stored in the demand power storage means at predetermined continuous time intervals in a predetermined power width The cooking device according to claim 1, wherein the demand power value is increased to the rated power value, and the demand power value is sequentially determined as a control upper limit power value .   When the demand power storage means is newly updated before the demand power value reaches the final value, the control upper limit power determining means determines the newly updated demand power value as the control upper limit power value. The cooking device according to claim 2, wherein the cooking device is determined as follows. The control upper limit power determining means includes
Instead of determining the rated power value as a control upper limit power value when the demand power storage means is not updated for a predetermined time or more,
The cooking device according to claim 1 , wherein the predetermined ratio of the rated power value is determined as a control upper limit power value when the demand power storage means is not updated for a predetermined time or more .   When the demand power storage unit is newly updated when the predetermined ratio of the rated power value is set as the control upper limit power, the control upper limit power determining unit sets the newly updated demand power value. The cooking device according to claim 4, wherein the cooking device is determined as a control upper limit power value.   The control upper limit power determining means continues the previous demand power value as it is when the received demand power value is smaller than the rated power value and does not change more than a predetermined amount of power from the previous demand power value. The heating cooker according to claim 1, wherein the control upper limit electric power value is determined.

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