JPH10185217A - Floor heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To variably set the duty ratio of on/off of a hot water valve by providing a memory means for storing the valve opening rate in a heat source machine and rewriting the valve opening rate. SOLUTION: On/off control values of a hot water valve optimum to respective terminal devices are stored in a non-volatile memory 16 such as an EEPROM provided in a heat source machine 10, connected to a control part 12, rewritten and referred to. A repair support terminal device 40 writes data in a RAM area which can be used for changing data to the non-volatile memory 16, so that the control part 12 can write the set value of duty ratio to the non-volatile memory 16. Accordingly, the control part 12 performs a desired combustion operation or individually drives and monitors a detected value from a sensor 15 or a tester at that time, so that it can support the repair.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor heating system in which a plurality of floor heating terminals are connected to a heat source unit, and to a floor heating system capable of adjusting a valve opening rate of a hot water valve used for temperature control of the terminals. About the system.

[0002]

2. Description of the Related Art In a floor heating system which has been widely used, a plurality of floor heating terminals are connected to a heat source device such as a water heater through a hot water pipe, and a heat operated valve inserted into each of the hot water pipes. By controlling on / off of the hot water valve, a predetermined amount of heat is supplied to the floor heating terminal. That is, the valve opening rate (duty ratio) of the hot water valve is controlled.

In the most common control method, a remote control of each floor heating terminal is provided with a volume switch for setting a floor heating capacity, and the hot water valve is turned on in accordance with a preset valve opening rate for each scale.・ Off control is performed.

[0004] The floor heating itself does not require rapid temperature control. Therefore, a valve having a slow response characteristic such as a thermal valve is used as a hot water valve. One cycle of on / off control is performed per minute. By doing so, it is possible to realize a floor heating system capable of setting the temperature for each terminal while suppressing costs.

[0005]

However, in the floor heating system, when the hot water flow path in each room tends to be closed,
When a plurality of terminals are used at the same time, a terminal having a closed hot water channel may be insufficient in capacity. Although various causes of the blockage are conceivable, the main cause is, for example, a secular change such as generation of algae in the hot water flow path.

Also, depending on the installation environment of the floor heating system, sufficient heat may not be sent to a certain terminal, and the terminal may have insufficient capacity. For example, there is a case where terminals are installed on the first floor and the second floor of a house and the amount of hot water supplied by a common circulation pump differs. When only the circulation of hot water is simply confirmed at the time of installation, the optimum valve opening rate cannot be known unless used for a while after installation.

Accordingly, an object of the present invention is to provide a floor heating system capable of variably setting the on / off duty ratio of a hot water valve.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat source unit having at least a control unit for performing combustion control and generating hot water, which is connected to the heat source unit via respective hot water pipes. In a floor heating system having a plurality of floor heating terminals and a hot water valve inserted into each of the hot water pipes and controlled to be turned on and off by a control unit of the heat source device, the heat source device has an opening rate of the hot water valve. This is achieved by a floor heating system characterized by having a memory means for storing the valve opening rate and making the valve opening rate rewritable.

According to another aspect of the present invention, a heat source unit having at least a control unit for performing combustion control and generating hot water, a plurality of floor heating terminals connected to the heat source unit via respective hot water pipes, In a floor heating system having a hot water valve inserted in each of the hot water pipes and controlled to be turned on and off by the control unit of the heat source unit, the floor heating terminal side has a memory means for storing an opening ratio of the hot water valve. And a floor heating system characterized in that the valve opening ratio is rewritable.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. However, the technical scope of the present invention is not limited to the embodiment.

FIG. 1 is an overall configuration diagram of a floor heating system according to an embodiment of the present invention. In this example, a plurality of floor heating terminals A and B are connected to the heat source device 10 having a hot water supply function. Reference numeral 20 denotes an outgoing header, 29 denotes a return header, and hot water is supplied to the floor heating terminal A from the heat source device 10 through an outgoing hot water pipe 23 and a return hot water pipe 24. The supply amount is
It is adjusted by changing the on / off duty ratio of the hot water valve 22 which is a thermal valve provided at the going header 20. Similarly, hot water is supplied to the floor heating terminal B from the heat source device 10 through the outgoing hot water pipe 27 and the return hot water pipe 28, and the amount of the hot water supplied is the hot water valve constituted by the heat operated valve provided at the outgoing header 20. It is adjusted by changing the on / off duty ratio of 26.

In the heat source unit 10, a control unit 12 comprising a microcomputer for controlling the combustion and the like is provided. The control unit 12 drives various actuators 14 in the heat source device in accordance with the combustion control program, and acquires a detection value from the sensor 15. Further, the control unit 12
Are remote controllers 31 and 32 of each terminal via a communication line 33.
And receives operation control signals from the respective remote controllers to perform on / off control of the hot water valves 22 and 24. Also,
Reference numeral 13 denotes a circulating pump, which circulates hot water to a floor heating terminal corresponding to the remote controller to which an operation command has been issued when one of the terminals is in an operating state.

Further, a characteristic part of the present invention is that the heat source unit 1
Non-volatile memory 1 such as an EEPROM provided in
6 is that an on / off control value of a hot water valve that is optimal for each terminal device is recorded. The nonvolatile memory 16 is connected to the control unit 12 and is rewritten and referred to by the control unit 12.

Reference numeral 40 denotes a repair support terminal device,
For example, it is configured by a portable personal computer or the like, and is communicably connected to the control unit 12 via a communication medium 42. Further, a power measuring terminal 43, a gas pressure measuring tube 44, and a tester terminal for measuring voltage and current are provided.

The basic function of the repair support terminal device 40 is to freely write and read data to and from the RAM area in the control unit 12, and to use the RAM area that can be used to change data in the nonvolatile memory 16. By writing data to the non-volatile memory 16, the control unit 12 can cause the control unit 12 to write the set value of the duty ratio.

The repair support terminal device 40 performs a combustion operation by writing a predetermined flag in a RAM area of the heat source device 10 as described in Japanese Patent Application No. 8-189000 filed by the present applicant, for example. Also, it has a function of operating the actuators individually and acquiring sensor values by reading data in the RAM area. Further, the physical quantities that cannot be detected by the sensors can be acquired by 43, 44, and 45.
Therefore, the control unit 12 executes a desired combustion operation or individually drives the actuator, and monitors the detection value from the sensor 15 or the tester at that time to support the repair.

Further, a characteristic part of the present invention is that the heat source unit 1
The point is that the flow meter 35 is inserted into the pipe between the zero and the outgoing header 20. The flowmeter 35 does not need to be provided in the floor heating system from the beginning, and may be mounted only when the duty ratio of the hot water valve is readjusted as the object of the present invention. This flow meter is not located between the heat source device 10 and the outgoing header 20, but is connected to the hot water pipe 23,
24, it may be provided as 35A and 35B as shown by broken lines in the figure.

FIG. 2 shows an example of a signal for controlling the hot water valves 22 and 26 of the terminals A and B. This control signal has a duty ratio (t2 / t) by changing the length of a period t2 during which the hot water valve is turned on within a cycle t1 of, for example, 20 minutes.
1) can be changed.

FIG. 3 is an example of a duty ratio control value recorded in the nonvolatile memory 16. A and B indicated by solid lines are initial values stored as normal values at the time of installation, or theoretical normal values in design at the time of factory shipment. Remote control 3
Usually, a volume switch for heating capacity setting is attached to 1 and 32. Therefore, the duty ratio (valve opening rate) corresponding to the maximum value and the minimum value and the capacity value between them.
Is shown by a solid line in FIG.

It is now assumed that a decrease in the capability of the terminal A has been detected. The reason is, for example, that the closing ratio of the pipe to the terminal A has increased. In this case, when the terminal A and the terminal B are operated at the same time, the amount of hot water supplied to the terminal A having a high blocking rate is reduced. Therefore, as shown in FIG. 1, the water meters 35 are inserted, the terminals A and B are independently operated, and the respective flow rates are measured at a predetermined duty ratio. When the decrease in the flow rate on the terminal A side is detected, the control unit 12 sets the control value A in the nonvolatile memory 16 from the repair support terminal device 40 to a higher value as shown by the broken line A1 in FIG. To instruct.

Alternatively, in some cases, the duty ratio of the hot water valve on the terminal side where the blocking rate has not deteriorated can be set low. That is, the amount of hot water circulating to the terminal B may increase because the closing rate of the terminal A increases.

The data stored in the nonvolatile memory 16 is
It may be a relation curve between the input value from the remote controller and the duty ratio shown in FIG. 3, or a constant for calculating the duty ratio.

Then, once tuning of the duty ratio is completed and new data is stored in the nonvolatile memory, the flow meter 35 is removed.

Instead of the flow meter 35, the same tuning may be performed by attaching a floor temperature thermistor for measuring the temperature of the floor surface to the room of each terminal.

FIG. 4 is a configuration diagram of another embodiment of the present invention. In this figure, the configuration of the hot water piping and header is shown in FIG.
It is the same as and omitted. In this example, the microcomputer 36 in the remote controllers 31 and 32 on the terminal side connected to the control unit 12 of the heat source device 10 via the communication line 33.
A and 36B respectively have nonvolatile memories 37A and 37B.
Is connected. Then, a control value relating to the valve opening rate of the hot water valve of each floor heating terminal or its operation constant is stored in the non-volatile memories 37A and 37B.

The repair support device 40 requests the microcomputer 12 of the heat source device 10 to write a control value relating to the valve opening rate of the hot water valve to the memories 37A and 37B of the remote control of each terminal device. As a result, the microcomputers 26A and 26B in each remote controller are connected to the memories 37A and 37B from the microcomputer 12 via the communication line 33.
Write to.

During normal operation, the microcomputers 36A and 36B of the remote controller of each terminal device request the microcomputer 12 in the heat source device 10 to turn on and off the hot water valves 22 and 26. At this time, the remote controller detects the valve opening rate of the hot water valve from the control values in the memories 37A and 37B, and issues an on / off request to the heat source device 10 accordingly.

[0028]

As described above, according to the present invention, in a floor heating system having a plurality of terminals, it is possible to adjust the valve opening rate of the hot water valve again in response to a problem such as a decrease in capacity. In addition, the life expectancy of the floor heating system can be easily taken.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a floor heating system according to an embodiment of the present invention.

FIG. 2 shows an example of signals for controlling hot water valves 22 and 26 of terminals A and B.

FIG. 3 is an example of a control value of a duty ratio.

FIG. 4 is a configuration diagram of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Heat source unit 12 Control part 16 Non-volatile memory 22, 24 Hot water valve A, B Floor heating terminal 23, 24, 27, 28 Hot water piping

Claims (3)

[Claims] 1. A heat source unit having at least a control unit for performing combustion control and generating hot water, a plurality of floor heating terminals connected to the heat source unit via respective hot water pipes, and A floor heating system having a hot water valve inserted and controlled to be turned on and off by a control unit of the heat source device, wherein the heat source device has memory means for storing an opening rate of the hot water valve; Floor heating system characterized in that it is rewritable. 2. A heat source unit having at least a control unit for performing combustion control and generating hot water, a plurality of floor heating terminals connected to the heat source unit via respective hot water pipes, and A floor heating system having a hot water valve inserted and controlled to be turned on and off by a control unit of the heat source device, further comprising: a memory means for storing an opening ratio of the hot water valve on the floor heating terminal side; Floor heating system characterized by rewritable valve rate. 3. The floor heating system according to claim 1, wherein a flow meter can be attached to the hot water pipe, and the memory means has a valve opening rate at which an output of the flow meter becomes a predetermined flow value. It is characterized by being rewritten.