JPH09269133A - Hot water floor heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accelerate a rise of a floor temperature as fast as possible upon start of operation and decrease the variation width of the floor temperature as narrow as possible during a temperature retaining treatment after a room temperature reaches a prescribed temperature, in a hot water floor heater. SOLUTION: A hot water floor heater comprises a radiator, a heat source machine 3 for generating hot water to be supplied to the radiator, a thermally moving valve for adjusting the amount of the hot water supplied to the radiator, a room temperature detector 23 for detecting a room temperature, and a control unit 34 for controlling the operation of the thermally moving valve based on the difference between the room temperature and a setting temperature. The heat source machine 3 is provided with two types of hot water circulating functions including a high temperature hot water circulation and a low temperature hot water circulation. The control unit sets the hot water circulating function to the high temperature hot water circulation during the start of a heating operation. Then, the control unit switches the hot water circulating function of the heat source machine 3 to the low temperature hot water circulation under either a condition where a prescribed time passes from the start of the heating operation or a condition where the room temperature reaches a range of prescribed temperature, and shifts to an operation for controlling the quantity of hot water circulation by the thermally moving valve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-water floor heating system in which warm water is circulated on a floor in a room for heating.

[0002]

2. Description of the Related Art Conventionally, a floor heating system using hot water has, for example, a floor heating panel as a radiator installed on a floor in a room and hot water supplied to the floor heating panel at an appropriate position. A heat source machine is installed, and between these heat source machines and the floor heating panel, a thermal valve for adjusting the amount of hot water supplied to this floor heating panel is arranged, and in the room,
A control unit for controlling the operation of the heat source device and the thermal valve is installed, and a control signal is sent from the control unit to the thermal valve based on the difference between the room temperature and the set temperature to turn it on / off. Is controlled to control the supply amount of hot water having a predetermined temperature generated in the heat source device, whereby the temperature of the room is maintained near the set temperature (for example, Japanese Patent Laid-Open No. H06-69242).
(See Japanese Patent Publication No. 147505).

[0003]

By the way, in such a conventional hot water floor heating system, the hot water temperature generated in the heat source unit is kept constant, but the rise of the floor temperature at the start of operation is accelerated. In order to achieve this, the hot water outlet temperature of the heat source unit is set high.

According to such a hot water circulation method, although the bed temperature rises quickly at the start of the operation, the above-mentioned method is performed based on the difference between the room temperature and the set temperature during the heat retention process after the set temperature is reached. The control signal is sent from the control unit to the thermal valve to turn it on.
Since the supply amount of hot water is controlled by controlling OFF, and the control condition is updated every predetermined cycle time, the floor surface temperature at the time of switching the thermal valve ON / OFF is controlled. The variability can be so great that comfort is compromised.

On the other hand, in order to avoid such inconvenience, if the hot water temperature from the heat source unit is set low, the fluctuation of the floor surface temperature during the heat retention treatment can be suppressed to a small level, but the floor temperature at the start of operation can be suppressed. There is a problem that the start up of is slow.

The present invention has been made in view of such conventional problems, and in the hot water floor heating apparatus, the rise of the floor temperature at the start of operation is made as fast as possible, and the room temperature after reaching the predetermined temperature is reached. The issue to be solved is to narrow the fluctuation range of the floor temperature as much as possible during the heat retention process.

[0007]

In order to solve the above-mentioned problems, the hot water floor heating apparatus according to the first aspect of the present invention includes:
A radiator installed on the floor of the room, a heat source device that generates hot water to be supplied to this radiator, and a heat source device that is provided between this heat source device and the radiator, and supplies the amount of hot water to the radiator. A thermal valve to adjust, a room temperature detector to detect the temperature in the room,
A control unit for controlling the operation of the thermal valve based on the difference between the room temperature and the set temperature; and
The heat source machine has two types of hot water circulation functions of high temperature hot water circulation and low temperature hot water circulation, and the control unit is
At the start of heating operation, high temperature hot water is circulated, and if either a predetermined time has elapsed from the start of heating operation, or if the room temperature has reached within a predetermined temperature range,
Switching the hot water circulation function of the heat source device to low temperature hot water circulation,
Further, it is characterized in that the operation is shifted to the operation by the thermal valve (that is, the hot water circulation amount control operation).

The hot water floor heating apparatus according to a second aspect of the present invention is the hot water floor heating apparatus according to the first aspect, wherein the control unit controls the amount of hot water supplied to the radiator every predetermined cycle time. Is performed while updating, and when the indoor temperature reaches a predetermined temperature at a time other than the update time of this control condition, the hot water circulation function of the heat source device is switched to low temperature hot water circulation, and, It is characterized in that the operation shifts to an operation by a thermal valve (that is, a hot water circulation amount control operation).

[0009]

DETAILED DESCRIPTION OF THE INVENTION A first embodiment according to claim 1 of the present invention will be described below with reference to FIGS. FIG. 1 is a system configuration diagram showing a hot water circuit of a hot water floor heating apparatus according to the present embodiment. In FIG. 1, reference numeral 1 denotes a hot water floor heating apparatus according to the present embodiment. The hot water floor heating system 1 supplies a plurality of floor heating panels 2 (2a and 2b) as radiators installed in a room and heating water to the floor heating panels 2 and heats the heating water. The heat source unit 3 to be performed, the hot water pump 4 provided in the heat source unit 3 for pumping the heating water and each floor heating panel 2 are connected, and the heating water pumped by the hot water pump 4 is connected to each floor heating panel. 2 heating water supply pipe 5 (5a
5b), each floor heating panel 2 and the heat source unit 3 are connected to each other, and the heating water return pipe 6 for returning the heat-exchanged heating water discharged from each floor heating panel 2 to the heat source unit 3; A thermal valve 7 (7a · 7) provided in the middle of each heating water supply pipe 5 for adjusting the amount of heating water supplied to each floor heating panel 2
7b) and corresponding to each floor heating panel 2,
Remote controller 8 (8a for setting the floor temperature, etc.)
And 8b).

More specifically, as shown in FIG. 2, the heat source unit 3 includes a gas valve 9 for adjusting the amount of combustion gas supplied to a burner (not shown) for heating the heating water, and the burner. An igniter 10 for igniting is connected together with the plurality of thermal valves 7 (7a, 7b) and the hot water pump 4.

The heat source unit 3 has a high temperature hot water circulation for circulating hot water at a high temperature (for example, 80 ° C.) and a low temperature hot water circulation for circulating hot water at a low temperature (for example 60 ° C.).
Equipped with two hot water circulation modes.

Further, the heat source device 3 is provided with a combustion control circuit 11 for controlling the operation of the gas valve 9 and the igniter 10, and the heat operated valve 7 (7a, 7b) and the hot water pump 4 are provided. Is provided with a driver 12 for controlling the operation of the hot water floor heating system 1 and a microcomputer 13 for outputting a control signal to the combustion control circuit 11 and the driver 12. A trial run switch 14 for performing the operation and a communication circuit 15 for transmitting and receiving a signal to and from the remote controller 8 (8a, 8b) are connected.

As shown in FIG. 3, the remote controller 8 is provided with a display section 16 for performing various displays on its operation panel, and a time setting key 17,
A room temperature thermistor is provided with various operation keys such as a program time setting key 18, a temperature setting key 19, a run / stop key 20, a program setting key 21, a time setting key 22, and a room temperature detector for detecting the room temperature. 23
And a connector 25 to which a floor temperature thermistor 24 as a floor temperature detector described later is connected.

Further, the operation / stop key 20 and
At the position corresponding to each of the program setting keys 21, a driving display lamp 20a showing a driving state,
Also, a program operation display lamp 21a indicating the execution state of the program is provided, and further, a switch box 40 for setting various functions of the remote controller 8 is provided below the remote controller 8.

The floor temperature thermistor 24 has a signal line 27.
, And a plug 28 detachably attached to the connector 25 of the remote controller 8 is attached to the other end, whereby the floor temperature thermistor 24 is detachably connected to the remote controller 8. It is like this.

The display section 16 is composed of a current time display section 29 which is a 7-segment LCD, a program time display section 30, and a set temperature display section 31 which is a flat panel LCD.

On the other hand, inside the remote controller 8, as shown in FIG.
And a communication circuit 3 for transmitting and receiving signals to and from the heat source unit 3.
3 is incorporated, and the microcomputer 32
At the start of the heating operation, high temperature hot water circulation is performed, while the heat source device is conditioned on the condition that a predetermined time has elapsed from the start of the heating operation or that the room temperature has reached within a predetermined temperature range. A control circuit 34 is provided as a control unit for switching the hot water circulation function of 3 to the low temperature hot water circulation.

Further, the switch box 40 includes a plurality (three in the present embodiment) of DIP switches 40 provided corresponding to the function of the remote controller 8.
a. 40b and 40c, each of which has a supply temperature setting switch for manually setting the temperature of hot water supplied from the heat source device 3, a test switch for advancing the time quickly, and a high temperature operating time for setting a high temperature operating time. It is used as a setting switch.

Next, the operation of the hot water floor heating system 1 according to this embodiment will be described.

In this hot water floor heating system 1, the operation / stop switch 20 provided in the remote controller 8 is turned on.
When the temperature is set to N, the operation is started, and when the operation is started, the thermal valve 7 is turned on based on the difference between the set temperature set in the remote controller 8 and the room temperature detected by the room temperature thermistor 23. The OFF time is 20 minutes as one cycle, and the ON time is 3 minutes to 20 minutes.
By varying between minutes (in this case, continuous operation), the supply amount of hot water supplied to the floor heating panel 2 via the thermal valve 7 is adjusted to adjust the room temperature.

Next, these details will be explained based on the processing flow shown in FIG. 6. First, step S1.
In step S2, the presence or absence of the operation ON signal is confirmed. If there is no operation ON signal, the operation stop signal is sent to the heat source device 3 and the stop signal is output to the thermal valve 7 in step S2, and the floor heating is performed. After the circulation of the hot water to the panel 2 is stopped, the process returns to the step S1 to enter the standby state for inputting the operation ON signal.

If it is determined in step S1 that there is an operation ON signal, the process proceeds to step S3,
When it is determined whether or not there is an operation ON signal in the previous process, and the process proceeds to the next step S4 on condition that the operation ON signal is received for the first time, and there is the operation ON signal in the previous process ( That is, after the second time), the process proceeds to step S5.

In step S4, the remote controller 8 transmits an operation ON signal to the heat source device 3, and the room temperature information obtained from the room temperature thermistor 23 and the set temperature (set by the temperature setting key 19). (Room temperature) information, the ON / OFF time of the thermal valve 7 is calculated, the thermal valve ON signal is transmitted to the heat source device 3, and at the same time, the thermal valve ON timer is set, and the high temperature operation timer is further set. Is set,
After the drive signal for circulating the high temperature hot water is sent to the heat source device 3,
Control goes to step S5.

Here, the high temperature operation timer is the high temperature operation time setting switch 40c of the remote controller 8.
The time (T1) set in is set.

In step S5, it is determined whether or not the high temperature operation timer has expired. If it is determined that the high temperature operation timer has not expired, the process proceeds to the next step S6 and the room temperature is (Set temperature-2) It is determined whether or not the temperature has reached a temperature of not less than ° C.

When it is determined in step S6 that the room temperature is (set temperature-2) ° C. or less, the process proceeds to the next step S7, and it is determined whether or not the thermal valve is ON. , ON, the process proceeds to the next step S8, and it is determined whether or not the thermal valve ON timer set in step S4 has expired.
On condition that the process is completed, the process proceeds to the next step S9.

In step S9, the thermal valve OF is opened.
After the F signal is sent to the heat source device 3 and the thermal valve 7 is closed, the supply of hot water to the floor heating panel 2 is stopped, and after the thermal valve OFF timer is set, The processing after step S1 is repeated. The thermal valve OFF timer is the time calculated in step S4.

In step S8, the thermal valve O
If it is determined that the N timer has not expired, the process returns to step S1 and the processing from step S1 onward is repeated until the thermal valve ON timer expires.

By the processes of steps S1 to S9, the room temperature exceeds (set temperature-2) ° C. until a predetermined time (the time set by the high temperature operation timer) elapses after the start of the heating operation. Up to this point, by supplying high-temperature hot water from the heat source device 3 to the floor heating panel 2, the rise of the temperature of the floor heating panel 2 is accelerated.

On the other hand, if it is determined in step S5 that the high temperature operation timer has expired, and if it is determined in step S6 that the room temperature has reached (set temperature-2) ° C., then the process proceeds to step S10. Then the thermal valve 7
ON / OFF time of is calculated and thermal valve is ON
After the signal is sent to the heat source device 3, the thermal valve ON timer is set, and further, the driving signal for the low temperature hot water circulation is sent to the heat source device 3, and then the processing of step S1 and thereafter is repeated.

By the processing of steps S5 and S10, it is possible to prevent the hot water of high temperature from being supplied after the start of the operation for the set time T1 and to prevent the floor F from being overheated.

Further, after the room temperature rises to a predetermined temperature by the processing of steps S6 and S10, the hot water circulation from the heat source device 3 is a low temperature hot water circulation, so that the floor temperature is kept warm during the heat retention treatment. ON of the thermal valve 7
-The temperature change of the floor surface due to turning OFF is suppressed to a small level, and when the room temperature rises to a predetermined temperature even when the control conditions are not rewritten, low temperature hot water circulation is immediately performed.

Further, when it is determined in step S7 that the thermal valve 7 is not in the ON state, step S
11, the process determines whether or not the thermal valve OFF timer has expired. If it is determined that the thermal valve OFF timer has not expired, the process from step S1 onward ends the thermal valve OFF timer. Is repeated until.

If it is determined in step S11 that the thermal valve OFF timer has expired, the process proceeds to step S10 and subsequent steps.

FIG. 7 shows the relationship between the elapsed time of the process and the room temperature and the hot water temperature in the hot water supply control.

As described above, according to the hot water floor heating system 1 of the present embodiment, the hot water of high temperature is supplied to the floor heating panel 2 at the start of operation, whereby the floor F is rapidly heated. , The room temperature is quickly raised,
After reaching the predetermined room temperature, the hot water circulation from the heat source unit 3 is switched to the low temperature hot water circulation, whereby the change in the bed temperature due to the intermittent hot water circulation is suppressed to a small level, and a comfortable heat retention process is performed.

Even during the heat retention process or immediately after the start of the operation, when the room temperature reaches the predetermined temperature, the low temperature hot water circulation is switched to prevent overheating in the entire operation area.

[0038]

As described above, according to the first aspect of the present invention.
According to the hot water floor heating apparatus according to the item (1), by the control unit, if a predetermined time has elapsed from the start of heating operation, or if the room temperature has reached within a predetermined temperature range, the hot water of the heat source device is set. Since the circulation function is switched from the high temperature hot water circulation to the low temperature warm water circulation, the following excellent effects are achieved.

At the start of operation, hot hot water is supplied to the radiator to rapidly heat the floor, whereby
The room temperature can be raised quickly, and after reaching the predetermined room temperature, the hot water circulation from the heat source device is switched to the low temperature hot water circulation, and the change in the bed temperature due to the intermittent hot water circulation is suppressed to a small level, As a result, a comfortable heat retention process can be performed.

According to the hot water floor heating apparatus of the second aspect of the present invention, the amount of hot water supplied to the radiator is controlled while the control condition is updated every predetermined cycle time, and this control is performed. When the indoor temperature reaches the predetermined temperature at a time other than the condition update time, the hot water circulation function of the heat source device is switched to the low temperature hot water circulation, so that the room temperature is set at a predetermined time other than the control condition update time. It is possible to prevent the temperature from being raised above the temperature.

[Brief description of drawings]

FIG. 1 is an overall system configuration diagram of a hot water floor heating apparatus of the present invention.

FIG. 2 is a block diagram showing a control system of the hot water floor heating apparatus according to the first embodiment of the present invention.

FIG. 3 is an external perspective view showing a remote controller of the hot water floor heating apparatus of the present invention.

FIG. 4 is a front view of a switch box provided with a high temperature operation time setting switch provided in the hot water floor heating apparatus of the present invention.

FIG. 5 is a schematic diagram showing a positional relationship between a remote controller and a radiator of the hot water floor heating apparatus of the present invention.

FIG. 6 is a processing flow diagram during operation of the hot water floor heating apparatus of the present invention.

FIG. 7 is a diagram showing a relationship between an elapsed time of hot water supply control processing and an indoor temperature and a hot water temperature according to the embodiment of the present invention.

[Explanation of symbols]

 1 Hot Water Heating Device 2 Floor Heating Panel (Radiator) 7 Thermal Valve 8 Remote Controller 23 Room Temperature Thermistor (Room Temperature Detector) 34 Control Circuit (Control Unit) 40c High Temperature Operating Time Setting Switch

Claims (2)

[Claims] 1. A radiator installed on a floor in a room, a heat source device for generating hot water to be supplied to the radiator, and a heat source device provided between the heat source device and the radiator, The system includes a thermal valve that adjusts the amount of hot water supplied, a room temperature detector that detects the temperature in the room, and a control unit that controls the operation of the thermal valve based on the difference between the room temperature and the set temperature. And, the heat source device has two types of hot water circulation function of high temperature hot water circulation and low temperature hot water circulation, and the control unit performs high temperature hot water circulation at the time of heating operation start and a predetermined time has elapsed from the start of heating operation. Or if the room temperature reaches a predetermined temperature range, the hot water circulation function of the heat source device is switched to a low temperature hot water circulation, and the operation by a heat valve is performed. Floor heating system . 2. The control unit is configured to control the amount of hot water supplied to the radiator while updating the control condition at every predetermined cycle time, and to control other than the update time of the control condition. The hot water floor heating according to claim 1, wherein when the room temperature reaches a predetermined temperature, the hot water circulation function of the heat source device is switched to a low temperature hot water circulation, and the operation is performed by a heat valve. apparatus.