JPH0546567B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for heating a floor in a regenerative floor heating system.

(Prior Art) A heat storage type floor heating system stores heat on the floor before a room is used, and when the room is used, the stored heat is released into the room to heat the room.

Since it takes time for heat storage type floor heating systems to store heat, it is usually necessary to predict how long it will take for the floor to reach a predetermined temperature (target temperature when heat storage is completed), and then calculate the temperature of the room. The power is turned on to the heater buried in the floor for the predicted time before the start of use, and the heating begins, thereby storing heat in the floor.

Heat-storage floor heating systems usually operate during late-night hours (usually 11 p.m. to 7 a.m.) when electricity costs are low.
8 hours) to complete heat storage by heating the floor,
When the room is in use, the stored heat is released to heat the room, making it impossible to control the temperature from day to night.

Therefore, the temperature of the room heated by the heat storage type floor heating system is determined by the floor temperature where the heat is stored, that is, the temperature at the time the heat storage is completed (heating is started). Therefore, the temperature at the start of heating is the highest, and thereafter, as the floor temperature in which heat has been stored falls, the room temperature gradually decreases.

Conventionally, the floor temperature when the heat storage is completed is set in advance, and a timer is used to turn on the power so that the set floor temperature is reached when the heat storage is completed.
It was turned off and power was being applied to the floor heater.

However, the heating period is generally a long period of 4 to 6 months or more, during which the climate changes from late autumn to early winter, and from severe winter to early spring. Therefore, in order to provide comfortable heating, it is necessary to readjust the set value of the floor temperature at the end of heat storage every month or once or twice a season depending on the climate. In this case, the floor temperature upon completion of heat storage is generally set based on standard thermal calculations or based on empirical values from heating operations over the past several years.

However, the climatic conditions during actual heating operation are usually different from past experience values, so in order to achieve comfortable heating, the temperature of the floor where heat is stored must be changed in a timely manner. However, it is generally difficult to adjust the floor temperature on a daily basis, so the stored heat floor temperature may be too high, causing overheating in the room, or the stored heat floor temperature may be too low, resulting in insufficient heating in the room. There were many.

In the case of overheating, the energy used to heat the floor during heat storage is wasted, which is uneconomical; in the case of underheating, there is no waste of energy during heat storage, but the room must endure the cold.

Conventionally, in order to avoid the trouble of changing the floor temperature setting every day and to prevent insufficient heating, the floor heating temperature is usually set at a high level. Therefore, the power consumption for heating the floor increased, which was uneconomical.

In addition, the temperature increase characteristics and temperature increase time of floor heating are affected by the outside temperature, so it is difficult to obtain comfortable thermal storage heating by controlling the floor heating temperature by measuring only the indoor temperature. Conventionally, it has been considered to measure the outside temperature instantaneously during heating and change the heating temperature of the floor based on the measurement results.

(Problems with conventional technology) However, with heat storage type floor heating systems, it takes time for the temperature to change (usually it takes about 1 hour to raise the temperature by 0.5 to 1.0 degrees Celsius), so every time the outside temperature changes, the floor heating system Even if the set value of the heating temperature is changed, the bed temperature does not completely follow the change, and there is a time delay before reaching the set temperature. This problem is more pronounced in underfloor heating systems with larger heat storage capacity.

(Objective of the Invention) The object of the present invention is to utilize data on the climate and outside air temperature before (past) heating, supplement that data with the outside air temperature the day before or a few days before the actual heat storage day. In addition to predicting the climate and outside temperature during indoor heating, it can also store heat in the floor so that optimal heating can be obtained every day even if the climate and outside temperature change during indoor heating, and there is no waste of energy used to store heat in the floor. An object of the present invention is to provide a method for heating a floor in a heat storage type floor heating system, which can reduce running costs by reducing energy consumption.

(Means for Solving the Problems) In order to achieve the above-mentioned object of the present invention, the following knowledge was obtained as a result of various studies on heat storage type floor heating systems.

It is desirable to determine the heat storage temperature (floor temperature = set value) upon completion of heat storage based on the outside temperature data most recent to the start of heat storage. In general, with thermal storage heating, the heat capacity of the entire room is very large, so the effect of sudden temperature changes (such as a cold morning on a single day) is not noticeable. For this reason, the idea that the heat radiated from the previous day is stored in the next night is almost valid. In this case, the amount of heat released on the previous day is approximately proportional to the temperature on the previous day, especially the temperature from the start of heat release (= time of completion of heat storage = morning) to the start of heat storage on that day. It is effective to use outside air temperature data up to the start of heat storage (a certain time period immediately before the start of energization).

Therefore, as described above, the present invention not only sets the set value of the floor temperature at the time of completion of heat storage based on the experience value of heating operation over the past several years, but also uses that experience value to set the floor temperature value at the time of completion of heat storage. This setting is supplemented by outside air temperature data for a recent time period.

That is, the floor heating method in the heat storage type floor heating system of the present invention was developed based on the above knowledge, and measures the outside air temperature at a certain time in the past at appropriate time intervals within a specific time, The outside temperature measured each time is divided into temperature categories for each predetermined temperature range (4th
The outside temperature data is classified into categories (as shown in the figure), the frequency of classification into each temperature category is counted for each category, and the relationship between this counted value and the outside temperature mode is classified into several ways,
Prepare floor temperature data that categorizes the relationship between each outside temperature mode and the optimal floor temperature into several ways, and use the past data to determine the outside temperature at a certain time before the start of electricity supply for heat storage in the floor heating system. Measure the outside air temperature under the same conditions as the outside temperature detection conditions, classify it into temperature categories, count the frequency of classification into each temperature category with a counter, and calculate the total value from the above-mentioned past outside temperature data. Determine the outside temperature mode when the value is a numerical value, determine the floor temperature at the end of heat storage in that outside temperature mode from the determined outside temperature mode and the above-mentioned past floor temperature data, and adjust the temperature according to the floor temperature. The floor heating device is energized to store heat.

(Operation of the Invention) The method for heating the floor in the regenerative floor heating system of the present invention before the start of indoor use is as follows.

The outside air temperature sensor 4 shown in FIG. Measure the outside temperature. The above measurement is performed every time a specific periodic signal from the timer circuit 12 is transmitted.

The measured outside air temperature is classified into temperature categories (outside temperature ranks) that are divided into predetermined temperature ranges (for example, every 5 degrees Celsius) as shown in Figure 4, and these are constantly output through the encoder 6 in Figure 3. The signals are inputted through the decoder 7 to the counters 3 ₁ to 3n. Each counter 3 ₁ to 3n counts the frequency of input to each temperature category (classification frequency) each time it is input.

When the measurement within the measurement time is completed, all outside air temperatures are read and the total count up to that point is counted for each temperature category. This count value is sent to the outside temperature mode determination circuit 8, and compared with past outside temperature data stored in the outside temperature memory 1, and the outside temperature mode corresponding to the count value is determined.

In this case, the determination is made by sequentially searching the counters 3 ₁ to 3n, and when the counted value satisfies the conditions for a certain outside temperature mode, it is determined that the outside temperature mode is selected. For example, as shown in Figure 5 A, the count value is in the range of -10℃ to -15℃ (rank 7) 5 times, in the range of -5℃ to -10℃ (rank 6) 16 times, and in the range of 0℃ to -5℃ When the temperature range (rank 5) is twice, it is an extremely cold day, and the outside temperature mode is determined to be E.

Also, if the count value is, for example, 0°C to 5°C as shown in Figure 5 D,
10 times in the ℃ range (rank 4), 10 times in the 5℃ to 10℃ range (rank 3), and 2 times in the 10℃ to 15℃ range (rank 2) in November or April. The climate is
The outside temperature mode is determined to be B.

The determined outside temperature mode is sent to the floor temperature determination circuit 10 through the encoder 9 as shown in FIG. (relationship with bed temperature) to determine the optimum bed temperature in that outside temperature mode, that is, the temperature at the time when heat storage in the bed is completed.

Based on this determined optimal bed temperature, the heat storage conditions of the bed temperature controller 11, such as the start time of energizing the heater for heat storage, the temperature of the floor when heat storage is completed (heat storage temperature), etc. are automatically set. The heating temperature of the bed is automatically controlled based on the setting, and the bed is heated to the set heat storage temperature when heat storage is completed.

Further, as described above, the outside temperature mode is determined based on the total count value of the input frequency (classification frequency) of the outside air temperature input to each counter ₃₁ to 3n, and furthermore, the outside temperature mode corresponding to this latest outside temperature mode is determined. Optimum bed temperature (optimum heat storage temperature) based on bed temperature data
is determined. Therefore, heating of the floor is performed based on the most recent outside temperature data before the start of electricity supply to the floor heating device for heat storage.

Note that each block in FIGS. 1 and 2 is activated by instructions from the timer circuit 12.

(Embodiment of the Invention) FIG. 1 shows an embodiment of a method for heating a floor in a regenerative floor heating system of the present invention. 13 in Figure 1
An outside temperature detection section is composed of an outside temperature sensor 4 such as a thermistor or a platinum thermometer, and a temperature measurement circuit 5.

The outside temperature detection unit 13 detects the temperature within a specific time (for example, 8.00 to 24.00) before the start of heat storage by the outside temperature sensor 4.
Appropriately, the outside air temperature is detected at time intervals (for example, once every 30 minutes) and measured by the temperature measuring circuit 5 to measure the outside air temperature. The above measurement is performed every time a specific periodic signal from the timer circuit 12 is transmitted.

31 _to 3n in Fig. 1 are counters, which are classified into outside temperature ranks (temperature ranges) of 1 to 7 as shown in Fig. 3, and each rank is divided into 5°C increments (outside temperature ranks). classified).

The outside air temperature measured by the outside air temperature detection unit 13 is classified into temperature categories (outside temperature ranks) divided into predetermined temperature ranges (for example, every 5 degrees Celsius) as shown in FIG. is constantly outputted through the encoder 6 in FIG. 3, and inputted through the decoder 7 into the outdoor temperature ranks of the corresponding temperatures of the counters 3 ₁ to 3n.

Further, each of the counters 3 ₁ to 3n is configured to count the input frequency (classification frequency) to each temperature category each time the outside temperature data is input to the respective outside temperature ranks 1 to 7. For example, the counter 3 ₂ counts the input of the outside temperature rank 2 in Fig. 4, and the counter 3 ₃
counts the input of outside temperature rank 3 in Figure 4.

1 in Figure 1 is the outside temperature memory, which measures the outside temperature at a certain time in the past at appropriate time intervals within a specific time, classifies the measured outside temperature into each temperature category, and classifies the outside temperature. The frequency of classification is counted for each category, and several relationships between the counted value and the corresponding outside temperature mode are stored.

9 in Figure 1 is a floor temperature memory, which contains several relationships (for example, the pattern in Figure 2) between the outside temperature mode and the optimal bed temperature (optimum bed heat storage temperature) in that outside temperature mode. classified and stored.

Reference numeral 8 in FIG. 1 is an outside temperature mode determination circuit, which determines the outside temperature mode based on the counted values of the counters 3 ₁ to 3n and the outside temperature data stored in the outside temperature memory 1.
This is to determine the outside temperature mode when the count value is reached. This criterion is determined, for example, as follows (see FIG. 5).

a If the outside temperature is -10°C or lower for 5 or more times...Outside temperature mode E.

b The outside temperature is -5-10℃ more than 10 times or -5-0℃
10 times or more and outside temperature mode is not E...Outside temperature mode D.

c If the outside temperature is 10℃ or more and is counted 8 times or more...
...Outside temperature mode A.

d The outside temperature is 0~5℃ more than 10 times or 5~10℃ 10 times
If the outside temperature mode is not C after counting more times...
...Outside temperature mode B.

e Other than the above a to d...Outside temperature mode C Therefore, the total value is -10℃ to -15 as shown in Figure 5 A
It is an extremely cold day if the range of ℃ (rank 7) is 5 times, the range of -5℃ to -10℃ (rank 6) is 16 times, and the range of 0℃ to -5℃ (rank 5) is 2 times. Therefore, it is determined that the outside temperature mode is E.

Also, if the aggregate value is 0°C to 5°C, for example, as shown in Figure 5 D,
10 times in the ℃ range (rank 4), 10 times in the 5℃ to 10℃ range (rank 3), and 2 times in the 10℃ to 15℃ range (rank 2) in November or April. The climate is
The outside temperature mode is determined to be B.

Reference numeral 10 in FIG. 1 is a floor temperature determination circuit, which compares and determines the outside temperature mode input from the outside temperature mode determination circuit 8 with the floor temperature data stored in the floor temperature memory 9. This is to determine the optimal bed temperature (optimum heat storage temperature of the bed) at the time of the test.

Reference numeral 11 in FIG. 1 is a floor temperature controller, which automatically adjusts the heat storage start time, heat storage temperature at the end of heat storage (floor temperature immediately before use), etc. based on the data output from the floor temperature determination circuit 10. The heating temperature of the bed is automatically controlled based on this setting, and the bed is heated to the set heating temperature when heat storage is completed.

The timer circuit 12 issues commands to each block in a timely manner, and has a command program incorporated therein.

(Experimental Example) FIGS. 6 and 7 are explanations of the case where the floor heating in the heat storage type floor heating system of the present invention is performed using late-night electricity.

Figure 6 is an example of an experiment in January, where the outside temperature remains extremely low.

Figure 6 shows the floor temperature set value (optimum floor heating temperature) determined based on the results of measuring the outside air temperature.
The figure shows the change in bed temperature when the machine is operated at
The room temperature is the change when the floor temperature is reached.

Figure 7 shows an example of the experiment in March. 6 and 7, the room temperature during the hours of use of the room is almost the same, but there is a difference in the changes in floor temperature. That is, by selecting the optimal heating value for the floor temperature, stable indoor conditions can be maintained during different periods of climate.

(Effects of the Invention) The floor heating method in the heat storage type floor heating system of the present invention has the following effects.

(1) Using data such as past climate conditions and outside air temperature, and also taking into account the most recent climate and outside air temperature before the start of heat storage, the temperature at the end of floor heating (floor temperature before the start of room heating) Since the system determines the temperature and stores heat in the floor based on the determination, fully automatic heating is possible in response to external dynamics such as the climate and outside temperature during the heating period. This reduces overheating and underheating, making it possible to provide comfortable floor heating.

(2) Fully automatic floor heating that adapts to the climate and outside temperature dynamics during the heating period is possible, so there is almost no wastage of energy (electricity) used for heat storage.
This contributes to energy conservation and significantly reduces running costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the bed temperature control method of the present invention.
The figure is an explanatory diagram showing the relationship between the outside temperature mode and the optimum bed temperature, Figure 3 is a detailed explanatory diagram of Figure 1, Figure 4 is an explanatory diagram showing the relationship between the total value by the counter and the temperature classification, and Figure 5 The figure is an explanatory diagram showing the relationship between the outside temperature distribution and the outside temperature mode, and FIGS. 6 and 7 are explanatory diagrams of different experimental examples of the present invention. 1 is outside temperature memory, 2 is floor temperature memory, 3 ₁ ~
3n is a counter.

Claims (1)

[Claims] 1 Measure the outside air temperature at a certain time in the past at appropriate time intervals within a specific time, classify the measured outside air temperature into temperature categories for each predetermined temperature range, and calculate the frequency of classification into each temperature category. Count each category,
Prepare outside temperature data in which the relationship between this count value and the outside temperature mode is classified into several ways, and floor temperature data in which the relationship between each outside temperature mode and the optimal floor temperature is classified into several ways. The outside air temperature during a certain time period before the start of energization for heat storage of the heating device is measured under the same conditions as the past outside air temperature detection conditions described above, and is classified into temperature categories, and the frequency of classification into each temperature category is determined for each category. The outside temperature mode at the time of the counted value is determined from the total value and the past outside temperature data described above, and the outside temperature mode at the time of the counted value is determined from the determined outside temperature mode and the past floor temperature data described above. Floor heating in a heat storage type floor heating system characterized by determining the floor temperature at the end of heat storage in the temperature mode and energizing the floor heating device for heat storage in accordance with the determined floor temperature. Method.