JPH08178319A - Thermal storage type floor heating system - Google Patents

Abstract

PURPOSE: To provide a comfortable floor heating system all time to which a modification can simply be implemented by adding a time switch, in the case of installing a floor heating system, when the system is required to be changed to a system wherein daytime power can be supplied by switching the heating method to that of a time-zone contract, thereby enabling the system to track load for the reason that heating load of a finished building becomes greater than that estimated before implementation of construction. CONSTITUTION: A controller 4 for controlling temperature is provided with a control mode for midnight time-zone and a control mode for an ordinary time-zone covering time other than the midnight time-zone, and is provided with a power unit 3 for supplying electric power thereto. To utilize only midnight power service for operation, only the controller 4 is used to carry out the operation. To apply electric power during the ordinary time-zone on a time-zone contact, a time switch 2 is to be added. By means of a signal from the time switch 2 power source voltage of the controller 4 supplied by the power unit 3 is changed to switch control mode.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type floor heating apparatus for storing heat in a heat storage material by using inexpensive late-night power and radiating the heat during the daytime for heating.

[0002]

2. Description of the Related Art A floor heating system utilizing radiant heat uniformly heats a room and directly stimulates a warm point of a human body, so that a comfortable and efficient heating system can be constructed.

Further, a heat storage type floor heating system has come to be used in order to further reduce the maintenance cost while providing such comfort.

That is, this is a system in which the heat generated by using inexpensive late-night power is stored in a heat storage material and heating is performed by radiating heat from the heat storage material during the daytime. With such a method, an optimal heating environment can be obtained at a low maintenance cost.

FIG. 3 shows an example of the structure of a conventional heat storage type floor heating system.

In this structure, the heat storage material 12 is provided under the floor finishing material 11, and the heater 13 and the heat insulating material 14 for preventing heat radiation to the underfloor are provided under the floor finishing material 11, and the heater 13 supplied with power during the midnight power time zone. To heat the heat storage material 12 to store heat,
After the midnight power time period ends, heat is radiated from the heat storage material 12 to heat the room.

As a heat storage material used in such a heat storage type floor heating system, a sensible heat storage material such as concrete or a latent heat storage material such as sodium sulfate is used.
Further, a combination of these two has been put into practical use.

In such a heat storage type floor heating device, the heat storage amount of the heat storage material is set so that the floor temperature can be maintained even on the day of maximum load, assuming the heating load of the building when designing the system. If the load at the time of building completion is larger than expected, or if cold days continue, the amount of heat storage will be insufficient,
There were times when the floor temperature could not be maintained.

[0009] In order to eliminate this, there is a contract in which a time switch is provided as a time zone contract in which power can be supplied during the day, and the heater is also supplied during the day.

In this case, in the midnight hours, control is performed to make the heat storage amount of the heat storage material a necessary amount, and in the daytime hours, the floor temperature and room temperature are controlled to a comfortable temperature. The method is different between midnight and daytime.

For this reason, a time switch for distinguishing between nighttime and daytime is required, and a controller with a time switch is used in order to share the controller for the midnight power and the controller for the contract by time zone. It was

As a system without a time switch, two types of heaters are installed: a heater that is energized with midnight power and a heater that is energized with normal power, and when the floor temperature drops after the end of the midnight power time period. There was a heater that was energized with normal power. (See, for example, Japanese Patent Laid-Open No. 2-89927)

[0013]

In the conventional system such as the former, when the heating load is small and the power supply in the daytime is not required, or when it is desired to use the power supply only at midnight, the controller should have a temperature control function. Even though you don't need a feature, you'll be using a controller with this feature, which is expensive.

Further, in this case, in addition to the midnight power for energizing the heater to operate the timepiece, the wiring for the daytime power is also required.

The conventional system such as the latter has a problem that the number of heaters is increased, the cost is increased, and the construction is troublesome and the construction cost is high.

[0016] Furthermore, at first, I intend to use it at midnight power, and since the heating load is larger than the design, even if I try to make it a system that can energize during the daytime even in the middle, it is impossible to additionally install a heater ( There is a problem that it will not be possible to deal with it.

[0017]

In order to solve the above problems, the present invention provides a controller for temperature control with a control mode in the midnight time zone and a control mode in the other normal time zones. A power supply unit that supplies power to the power supply is installed, and when operating with only midnight power, it can be used only by the controller. Thus, the control mode is switched to operate by changing the power supply voltage of the controller supplied from the power supply unit.

Furthermore, when the power supply voltage is changed, it is changed with a time constant.

[0019]

In the present invention, with the above-described configuration, it is not necessary to use a controller having a function that is not necessary when using only night power, and the heating load assumed before the construction is completed when the building is completed. Even if you are getting bigger and want to change the heating method to a contract by time zone so that you can turn on electricity even during the day, you can easily do it by adding a time switch, and you can always get a comfortable heating system.

Furthermore, when the power supply voltage is changed, the time constant is provided so that the power supply voltage is changed, so that there is no possibility of malfunctioning at the time of switching.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of a heat storage type floor heating system of the present invention.

FIG. 1 shows a schematic structure of the present invention. A power source 1 is connected to a heating element 6 for heating a heat storage material 12 via a relay 5 to store the heat.

The controller 4 controls the energization of the heating element 6 by operating the relay 5 in response to signals from the temperature sensor 7 for detecting the temperature of the heating element 6 or the heat storage material 12 and the temperature sensor 8 for detecting the room temperature. Is.

The power for operating the controller 4 is supplied from the power supply unit 3 connected to the power supply 1.

The time switch 2 is also connected to the power source 1 so as to input the midnight time zone or the normal time zone to the controller 4 via the power source unit 3.

FIG. 2 is a block circuit diagram showing the main part. The power switch 1 is connected to the time switch 2 and the power supply unit 3 described above.

The time switch 2 has a contact 21 that opens and closes at a set time, and since it is a known unit, its detailed description will be omitted.

In the power supply unit 3, a DC voltage is generated by the rectifying / smoothing circuit 31 connected to the power supply 1, and this voltage is converted into a signal from the time switch 2 by using the stabilizing unit 32 capable of varying the output voltage. A DC power supply having a voltage set accordingly is created and supplied to the controller 4.

The stabilizing unit 32 comprises a stabilized power supply IC 33 of variable output voltage (hereinafter referred to as variable power supply IC), resistors 34, 35 and 36 for setting output voltage, and a capacitor 37 for time constant. ing.

The variable power supply IC 33 operates to stabilize the input voltage to an output voltage determined by the voltage between its output terminal 38 and the setting terminal 39.

In the present embodiment, the output voltage is divided by the resistors 34 and 35, or the resistors 34 and 3 are used.
The voltage is divided by the parallel resistance value of 7 and the resistance 35.

Since the resistor 37 is connected in parallel to the resistor 34 via the contact 21 of the time switch 2, the power source voltage output from the power supply unit 3 by the operation of the time switch 2 is changed. It is changing.

Since the capacitor 37 is connected in parallel to the resistor 35, it does not change immediately when the power supply voltage changes due to the operation of the contact 21, and the resistors 35 and 36 do not change.
With a time constant determined by the capacitor 37, it gradually changes.

The controller 4 is adapted to operate by being supplied with its power from the power supply unit 3, and a microcomputer 47 for operating the relay 5 for judging the temperature and controlling the energization of the heater 6, and the microcomputer 47. It is composed of a three-terminal power supply IC 43 for making a power supply for the microcomputer 47, a determination circuit 50 for determining the power supply voltage from the power supply unit 3, and the like.

The microcomputer 47 includes a heating element 6
Alternatively, a temperature sensor 7 for detecting the temperature of the heat storage material 12 and a temperature sensor 8 for detecting the room temperature are connected, and the temperature of each part is determined by the signals of these sensors so that the temperature becomes a preset temperature. The relay 5 is operated to control the energization of the heater 6.

Here, the transistor 49 is for driving the relay 5, and a drive signal from the microcomputer 47 is applied via the bias resistor 48 to operate the transistor 49 to operate the relay 5.

In the decision circuit 50, the Zener diode 4
5 and a reference voltage created by a bias resistor 44 that causes a current to flow therethrough, and a voltage obtained by dividing the voltage from the power supply unit 3 by the resistors 41 and 42 are input to the comparator 46, and the output of the comparator 46 is input to the microcomputer 47. It is designed to be entered.

When installing such a floor heating system,
Controller 4 is installed on the wall of the room where floor heating is installed,
The power supply unit 3 and the time switch 2 are installed next to the distribution board or the like.

Although the controller 4 needs a temperature setting circuit, a display circuit for the setting state, and the like, these are well known and can be omitted.

In the same manner as the conventional operation mode, the controller 4 has a control mode (hereinafter, referred to as a midnight mode) for adjusting the heat storage amount of the heat storage material to a necessary amount in the midnight time zone for storing heat, and a daytime time zone. Has two types of modes (hereinafter referred to as daytime modes) for controlling the floor temperature and room temperature to a comfortable temperature.

Then, in order to correspond to this mode, the contact 21 of the time switch 4 is closed and the resistor 36 is connected in parallel with the resistor 34 in the midnight time zone, and the power supply voltage to the controller 4 becomes low. It is detected by the determination circuit 50 and input to the microcomputer 47 to operate in the midnight mode.

In the daytime after the midnight time is over,
The contact 21 is opened and the resistor 36 is disconnected to increase the power supply voltage to the controller 4, which is detected by the determination circuit 50 and input to the microcomputer 47 to operate in the daytime mode.

Next, the operation of the above configuration will be described.

First, a description will be given of the case where the heating load is not so large and heating can be performed in the daytime only with the stored heat amount, and when only the midnight power is used.

At this time, since the time switch for controlling the energizing time zone of the late-night power is installed by the electric power company, the time switch 2 described so far is not necessary and therefore not installed.
(The state without the time switch 2 in FIG. 1) Then, the resistor 36 of the power supply unit 3 is wired at the time of construction so as to be connected in parallel to the resistor 34. In this state, the controller 4 operates in the midnight mode.

In this case, the midnight time (usually 23: 0
From 0 to 7:00 the next morning (8 hours), the time switch (not shown) installed by the electric power company operates and the power supply 1
The electric power is supplied from the electric power source, and the controller 4 operates to operate the relay 5 to energize the heating element 6 to generate heat and heat the heat storage material 12 to store heat.

During this time, the temperature of the heat storage material 12 is monitored by the temperature sensor 7 and the energization of the heating element 6 is controlled so that the temperature of the heat storage material 12 reaches the set value, and at the end time of the midnight time zone. Gives the required amount of heat storage. After that, the heat accumulated in the heat storage material 12 is radiated to heat the daytime.

Next, a case will be described in which the load at the time of completion of the building is larger than expected and the system is changed to a system in which electricity can be energized during the daytime as a time zone contract.

According to the contract for each time zone, the user is required to install a time switch for distinguishing the time switch from the late-night time zone when the electricity charge is low.

In this case, the time switch 2 is added,
The resistor 36 of the power supply unit 3 is the contact 2 of the time switch 2.
Wiring is made in parallel with the resistor 34 through 1.
(State of FIG. 1) Then, the time switch 2 operates so as to close the contact 21 in the midnight time zone and open the contact 21 in the other daytime hours.

Since this is done, the power supply unit 3
The resistor 36 is parallel to the resistor 35 during the midnight time, the power supply voltage becomes low, and the determination circuit 50 determines this and inputs it to the microcomputer 47, so that the controller 4 operates in the late night mode.

During the daytime, the resistor 36 is separated from the resistor 35 to increase the power supply voltage, and similarly the controller 4 operates in the daytime mode.

That is, in the midnight time zone, the energization of the heating element 6 is controlled in the same manner as described above to obtain the required heat storage amount at the end time of the midnight time zone. Then, when the time switch 2 is operated to detect that the power supply voltage has increased during the daytime, the microcomputer 47 operates in the daytime mode, and the room temperature detected by the temperature sensor 8 and the heat storage detected by the temperature sensor 7 are detected. While monitoring the floor temperature estimated from the temperature of the body 12, the power supply to the heater 6 is controlled so that the heating is always in a comfortable state.

In this way, the required heat storage amount is obtained during the midnight time, and during the other daytime hours, heat is radiated from the heat storage material 12 and the heating load is large and the heat storage amount is insufficient. The heater 6 is energized to supplement the amount of heat, so that comfortable heating can always be obtained.

Further, even when the contact 21 operates and the power supply voltage to the controller 4 changes, the power supply voltage gradually changes because the time constant is provided by the capacitor 37, and the microcomputer of the controller 4 is changed. Since the response of the three-terminal power supply IC 43 that makes up the power supply of 47 can be sufficiently followed, the power supply voltage of the microcomputer 47 does not change, and there is no risk of malfunction due to fluctuations in the power supply voltage.

In the present embodiment, an example in which the heating system is changed after floor heating has been shown, but when it is known that the heating load is large at the time of designing the system, it is installed as a system that can be energized from the beginning even in the daytime. do it.

[0058]

As described above, according to the heat storage type floor heating system of the present invention, the following effects can be obtained.

(1) Even if the heating load assumed before construction is large at the time of building completion, and it is desired to change the heating method to a contract by time zone and change to a system that can energize during the day and follow the load, It can be done simply by adding a time switch, and you can always get a comfortable heating system.

(2) Since the controller is only the temperature control section, it can be made compact and inexpensive.

(3) Since the controller does not have a time switch function and only controls temperature, it can be used without problems even with a power supply that is not energized during the daytime, such as midnight power. There is no need for extra wiring dedicated to the controller.

In other words, the system can be constructed at low cost when used with late-night power.

(4) Since the time switch only needs to have a contact output, a general-purpose one can be used instead of a dedicated controller, so a cheap one can be used.

In addition, when a system is newly developed, only the controller needs to be developed, so that the development period and cost can be reduced.

(5) Even when only the controller is installed for the power supply at midnight at the beginning, even if the system is changed to a system that energizes in the daytime by a contract according to the time of the day, the power is added by adding the time switch. Just connect it to the unit.

Therefore, it is not necessary to add new wiring between the power supply unit and the controller.

(6) When the operation mode of the controller is switched, since the power supply voltage is changed with a time constant, there is no malfunction due to fluctuations in the power supply voltage when the mode is switched.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a heat storage type floor heating device showing an embodiment of the present invention.

FIG. 2 is a block circuit diagram showing a main part of a heat storage type floor heating system showing an embodiment of the present invention.

FIG. 3 is a cross-sectional configuration diagram of a heat storage type floor heating device showing a conventional example.

[Explanation of symbols]

 2 Time switch 3 Power supply unit 4 Controller 6 Heating element 32 Stabilizer 36 Resistor 37 Capacitor 50 Judgment circuit

Claims (2)

[Claims] 1. A controller (4) for controlling energization of a heating element (6) is provided with a control mode in a midnight time zone and a control mode in a normal time zone other than that, and the controller (4) is powered by electricity. A power supply unit (3) for supplying power is further provided, and a time switch (2) for switching the control mode is further provided, and the power is supplied from the power supply unit (3) when the time zone is reached by the signal of the time switch (2). A heat storage type floor heating system characterized in that the power supply voltage to the controller (4) is changed. 2. The heat storage type floor heating system according to claim 1, wherein the power supply voltage to the controller (4) is changed with a time constant.