JP3558197B2 - Floor heating system - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention performs floor heating of a plurality of systems using one heat source unit, and determines the length of circulation time of hot water per fixed time based on a difference between a set room temperature and a current room temperature during room temperature control. And a floor heating apparatus that performs intermittent operation periodically.
[0002]
[Prior art]
FIG. 3 shows an example of a case where hot water generated by one heat source device is circulated to a plurality of systems of floor heating in a floor heating device. In FIG. 3, 1 is a heat source unit, 2 is an outgoing header, 3 is a return header, 4, 5, and 6 are hot water mats (floor heating), 4a, 5a, and 6a are outgoing headers 2, return headers 3, and each hot water mat. Hot water circulation pipes (pair tubes) connecting 4, 5, and 6; 7, 8, and 9 floor heating controllers; 7a, 8a, and 9a room temperature sensors; 10, 11, and 12 signal lines; (Electrical board).
[0003]
In the above floor heating device, hot water is generated by the heat source unit 1 and circulated from the header 2 through the hot water circulation pipes 4a, 5a, and 6a into the respective hot water mats 4, 5, and 6 to perform floor heating. Is what you do.
[0004]
The room temperature control is performed when the difference (load) between the set room temperature input to the floor heating controllers 7, 8, and 9 and the current room temperature detected by the room temperature sensors 7a, 8a, and 9a is equal to or more than a certain value. An operation of continuously circulating hot water in the hot water mats 4, 5, and 6 is performed, and when the temperature difference falls below a certain temperature, the operation is switched to an operation of intermittently circulating hot water.
[0005]
Further, the intermittent operation further determines stepwise the time during which the hot water circulates for a predetermined time, for example, 20 minutes, depending on the load. When the load is large, the time is long, for example, when the hot water circulates for 18 minutes. When the load is small, the operation of circulating hot water for 3 minutes and stopping for 17 minutes is repeated to control the room temperature.
[0006]
[Problems to be solved by the invention]
As described above, since the intermittent operation is combined with the room temperature control in the conventional floor heating device, when there are a plurality of floor heating systems, each system independently performs the intermittent operation. This example will be described with reference to FIG.
[0007]
In case of room A (hot water mat 4), intermittent operation for 3 minutes, stop for 17 minutes, in room B (hot water mat 5), intermittent operation for 8 minutes, stop for 12 minutes, in case of room C (hot water mat 6) The intermittent operation for 5 minutes and the intermittent operation for 15 minutes are independently performed. At this time, when the intermittent operation of each system is, for example, two systems overlap, the heat source unit 1 operates at medium output in three-stage control only during the overlap, and when the three systems overlap, The operation is performed at a high output only during the overlap, and the operation is performed at a low output when only one system is used. However, since the load in each room is different, the period of operation at high or medium output is short, and the period of operation at low output (low load) is much longer.
For this reason, since the heat source unit 1 is designed with emphasis on a high load, there is a problem that the system efficiency is poor in the case of a low load operation.
[0008]
An object of the present invention is to always synchronize the intermittent operation start timing (warm water circulation start timing) while a plurality of systems are performing intermittent operation at the same time, so that the overlapping operation time is always established for a certain time from the start of the intermittent operation. In order to improve the operation efficiency of the apparatus, the control is performed so that the low-load operation time is relatively reduced.
[0009]
[Means for Solving the Problems]
The configuration of the present invention proposed to achieve the above object is as follows.
[0010]
In the invention as set forth in claim 1, in the floor heating device, hot water is circulated through a plurality of floor heating hot water mats using a single heat source device whose output can be controlled stepwise or proportionally according to load. In the case of room temperature control, in a floor heating device that determines the circulation time of hot water based on the difference between the set room temperature and the current room temperature and performs intermittent operation, when multiple systems of hot water mats perform intermittent operation simultaneously And a synchronous operation control circuit for synchronizing the hot water circulation start timing of the intermittent operation of all the systems.
[0011]
According to a second aspect of the present invention, in the first aspect of the present invention, the intermittent operation is performed by controlling the room temperature by the length of the circulation time of the hot water per a fixed time.
[0012]
According to a third aspect of the present invention, in the first or second aspect of the present invention, an outgoing header is attached to the tapping side of the heat source unit, and an on / off control valve is provided for each system in the outgoing header. Control for synchronizing the circulation start timing of hot water.
[0013]
[Action]
The hot water generated by the heat source unit is branched into respective systems at the outgoing header, circulates through the respective floor heating hot water mats, and returns to the return header. The circulation of the hot water continuously circulates when the load is large (when the difference between the set room temperature and the current room temperature is large), and shifts to the intermittent operation when the load reaches a predetermined size. In the intermittent operation, the operation time per a fixed time is determined according to the load, and so-called fine control is performed stepwise. When the intermittent operation is simultaneously performed in a plurality of systems, the synchronous operation control circuit synchronizes the intermittent circulation start timing of the hot water. As a result, for example, if two systems start intermittent operation at the same time, one is controlled to intermittent operation for 5 minutes within 20 minutes, and if the other is 13 minutes, the overlapping 5 minutes A load operation is performed, and then a low load operation is performed for 8 minutes. As a result, the relatively low load operation time is relatively reduced.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
The floor heating device is a system in which hot water generated by one heat source device is circulated to a plurality of systems of floor heating. The heat source unit is a floor heating unit or a unit that combines a hot water supply function and a heating function with this unit, or a unit that combines a hot water supply and heating with a reheating function of a bath. It is assumed that the output can be controlled to be large, medium, small, or proportional depending on the output.
Further, the floor heating device to which the present invention is applied is based on the premise that a system that controls room temperature by intermittent operation is adopted.
[0015]
The control of the intermittent operation may be performed by installing a control valve for each system in an outgoing header provided on the tapping side of the heat source unit and performing ON / OFF of this valve, or on the side of the floor heating hot water mat. A valve having a similar function may be attached.
[0016]
The intermittent operation is determined by how many minutes hot water is circulated in the floor heating for a certain period of time, for example, between 15 minutes and 20 minutes, and this certain period is basically the same for all systems in one system. Is set to
The intermittent operation time changes stepwise according to the magnitude of the difference between the set room temperature input to the floor heating controller and the current room temperature.
[0017]
Synchronous operation control circuit, when a signal indicating that the transition from a plurality of floor heating to intermittent operation is input, performs an operation to synchronize the start timing of the intermittent operation, based on this operation, for example, provided in the going header Match the timing when the control valve opens. However, the timing at which the control valve closes is, of course, performed for each system.
[0018]
【Example】
An embodiment of the present invention will be described in detail with reference to FIG.
1 is a heat source unit whose output can be changed to large, medium and small, 2 is a forward header provided with control valves 2a, 2b, 2c for ON / OFF control for each system, 3 is a return header, 5 and 6 are hot water mats, 4a, 5a and 6a are hot water circulation pipes connecting the outgoing header 2, return header 3 and hot water mats 4, 5 and 6, respectively, and 7, 8 and 9 are floors provided for each room. Heating controllers, 7a, 8a, 9a are room temperature sensors, 10, 11, 12 are signal lines.
[0019]
Reference numeral 13 denotes a control circuit of a system including a synchronous operation control circuit 13a provided in the heat source unit 1, which is detected by the set room temperature input by the floor heating controllers 7, 8, and 9 and the room temperature sensors 7a, 8a, 9a. The room temperature is input to the control circuit 13 via the signal lines 10, 11, and 12.
[0020]
FIG. 2 is an explanatory diagram showing an example of synchronizing the hot water circulation start timing according to the present invention and a change in the output of the heat source device 1. The hot water mat 4 (A room) and the hot water mat 5 (B room) shown in FIG. 3) is a control example of the synchronous operation control circuit 13a performed when the hot water mat 6 (room C) enters the intermittent operation.
[0021]
Now, assuming that the intermittent operation in the room A is intermittently operated in the cycle of hot water circulation for 3 minutes and the stoppage for 17 minutes while the intermittent operation in the room B is started in the cycle of hot water circulation for 8 minutes and the stoppage for 12 minutes, the synchronous operation control circuit 13a Prior to the timing of the start of the circulation of the hot water in the room A, the control valve 2b in the system leading to the room B is closed and the control valve 2b in the room B is opened at the same time as the control valve 2a in the room A is opened. open. By this synchronous control, while the floor heating of the room A and the room B is performing the intermittent operation at the same time, the heat source unit 1 is operated with the medium output for 3 minutes, and is operated with the small output for 5 minutes, and this is repeated.
[0022]
Next, assuming that the room C enters the intermittent operation on the way, the control valve 2c is closed and the intermittent operation is temporarily interrupted, and then the room A (the room B) starts the intermittent operation as in the case of the room B. Then, the control valve 2c is opened for 5 minutes at the same time, and the intermittent operation is performed with a cycle of closing for 15 minutes. By this synchronous control, the heat source device 1 performs the operation of high output for 3 minutes, output for 2 minutes, output for 3 minutes, and stops for 12 minutes.
[0023]
【The invention's effect】
As described above, while the floor heating of a plurality of systems simultaneously performs the intermittent operation as described above, the heat source unit is operated at an efficient large / medium output in order to synchronize all the hot water circulation start timings. It is possible to make the operation time longer and the operation time at a small output shorter than in the conventional control method. As a result, the efficiency of the system is improved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a floor heating device embodying the present invention.
FIG. 2 is an explanatory diagram showing a control example and a change in the output of a heat source unit at the time of a multiple-system same-time intermittent operation.
FIG. 3 is an explanatory diagram of a conventional floor heating device.
FIG. 4 is an explanatory diagram showing a control example and a change in the output of a heat source unit when a plurality of systems are operated at the same time during an intermittent operation in a conventional floor heating apparatus.
[Explanation of symbols]
1 Heat source unit 2 Outgoing headers 2a, 2b, 2c Control valve 3 Return headers 4, 5, 6 Hot water mats 4a, 5a, 6a Hot water circulation pipes 7, 8, 9 Floor heating controllers 7a, 8a, 9a Room temperature sensors 10, 11, 12 signal line 13 control circuit 13a synchronous operation control circuit

Claims (3)

Using a single heat source unit whose output can be controlled stepwise or proportionally according to the load, circulate hot water through multiple sets of floor heating hot water mats, and when controlling room temperature, the difference between the set room temperature and the current room temperature In a floor heating device that determines the circulation time of hot water based on the difference and performs intermittent operation, when the hot water mats of a plurality of systems start intermittent operation at the same time, synchronization for synchronizing the hot water circulation start timing of intermittent operation of all systems A floor heating device provided with an operation control circuit. The floor heating device according to claim 1, wherein the intermittent operation controls the room temperature by the length of the circulation time of the hot water per a fixed time. 3. The floor heating according to claim 1, wherein an outgoing header is attached to the tapping side of the heat source unit, and an on / off control valve is provided in each of the outgoing headers for each system so that the control valve synchronizes the circulation start timing of the hot water. apparatus.

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