JPH0452571Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention heats a heat pipe by supplying hot water,
The present invention relates to a floor heating device that performs floor heating.

(Prior art) A commonly known floor heating system using a heat pipe is one in which hot water in a bathtub is circulated through a floor heating pipe, and the heat pipe attached to the floor heating pipe is heated. .

(Problem that this invention attempts to solve) However, if the floor heating system uses the hot water in the bathtub, if there is no hot water in the bathtub or if the hot water is cold, You will no longer be able to use your floor heating system.

Therefore, the object of this invention is to solve such conventional problems and provide a floor heating system that can always be in a usable state.

(Means for solving the problem) In order to solve this problem, the floor heating device according to this invention has a hot water supply pipe 3a that supplies hot water from the water heater 2 to the faucet 1, and a hot water supply pipe 3a that supplies hot water from the faucet 1 side. A return pipe 3b for returning hot water supplied to the machine 2 is connected in a loop to form a circulation pipe 3, and a floor heating pipe 4 is provided with a heat pipe 6 between the hot water supply pipe 3a and the return pipe 3b. At the same time, a temperature detection means 15 for detecting the temperature of the heat pipe 6 is provided, and the return pipe 3b is located upstream from the connection part 3c between the return pipe 3b and the floor heating pipe 4 and downstream from the faucet 1. A first on-off valve 8 is provided in the floor heating pipe 4, a second on-off valve 9 is provided in the floor heating pipe 4, and a connection part 3c between the return pipe 3b and the floor heating pipe 4 is provided.
A circulation pump 10 for circulating hot water is provided in the return pipe on the downstream side, and based on the output signals of the flow rate detection means 11 and the temperature detection means 15, when the faucet 1 is not in use, the heat pipe When the heating of the heat pipe 6 is not performed, the first on-off valve 8 is opened and the second on-off valve 9 is closed, and the circulation pump 10 is operated. When heating is not performed, the first on-off valve 8 and the second on-off valve 9 are closed, and the circulation pump 1 is closed.
0 is stopped, and when the faucet 1 is used and the heat pipe 6 is heated, the first on-off valve 8 is closed and the second on-off valve 9 is opened, and the circulation pump 10 is operated. , a controller 7 that opens the first on-off valve 8 and the second on-off valve 9 and operates the circulation pump 10 when the water faucet 1 is not in use and the heat pipe 6 is heated. It is characterized by

(Function) When the faucet 1 is not in use and the heat pipe 6 is not heated, the controller 7 controls at least one of the on-off valves 8 and 9 to be in an open state and the circulation pump 10 to be in an operating state. The hot water is circulated through the circulation pipe 3.

Therefore, when the faucet 1 is used, hot water at a desired temperature can be supplied.

Also, when using only faucet 1, controller 7
Since the first on-off valve 8 is controlled to be in the closed state, hot water can be efficiently discharged from the faucet 1.

Since the controller 7 stops the circulation pump 10 when only the faucet 1 is used, there is no negative pressure between the first on-off valve 8 and the circulation pump 10, and the circulation is maintained by the negative pressure. This prevents a load from being placed on the pump 10.

Further, when the faucet 1 is in use and the heat pipe 6 is heated, the controller 7 controls the first on-off valve 8.
is closed so that hot water can be efficiently discharged from the faucet 1, and the second on-off valve 9 is opened,
Since the circulation pump 10 is operated, hot water can be efficiently circulated through the floor heating pipe 4.

When the faucet 1 is not in use and the heat pipe 6 is heated, the controller 7 opens the on-off valves 8 and 9 and operates the circulation pump 10 to operate the circulation pipe 3 and the floor heating pipe. Since hot water is circulated through all of the water taps 1 and 4, not only can floor heating be performed, but also hot water at a desired temperature can be immediately supplied when the faucet 1 is used.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is an overall configuration diagram showing the floor heating system according to this invention, Fig. 2 is a flowchart, and Fig. 3 is a diagram showing a flowchart.
The figure shows another embodiment of this invention.

In FIG. 1, 1 is a faucet, 2 is a water heater, 3 is a circulation pipe, and 3a constitutes this circulation pipe,
A hot water pipe 3b guides hot water warmed by the water heater 2 to the faucet 1, a return pipe 3b returns hot water supplied by the hot water pipe 3a to the water heater 2, and 4 is connected between the hot water pipe 3a and the return pipe 3b. 5 is a heat exchanger attached to this floor heating pipe 4, 6 is a heat pipe arranged in parallel in a plane from this heat exchanger 5, and 7 is a microcomputer etc. that controls the entire device. It is a controller with a built-in.

There is a return pipe 3b between the water faucet 1 and the connection part 3c of the floor heating pipe 4 in the return pipe 3b.
A first on-off valve 8 made of an electromagnetic valve is provided to open and close the corresponding position, and a second on-off valve 9 also made of an electromagnetic valve is provided on the floor heating pipe 4 to open and close the pipe 4.

Between the connection part 3c of the floor heating pipe 4 and the water heater 2 in the return pipe 3b, a circulation pump 10, a flow rate detection means 11 consisting of a flow meter, etc., and a thermistor 12 are installed in order from the connection part 3c side. ,or,
A thermistor 13 and a flow control valve 14 are sequentially provided from the water heater 2 side between the connection portion 3d of the water heater 2 and the floor heating pipe 4 in the hot water pipe 3a.

The circulation pump 10 is a pump that circulates hot water along the circulation pipe 3, and the flow rate detection means 11 detects the flow rate of the hot water supply pipe 3a.Based on the output signal of this flow rate detection means 11, the controller 7
is configured to detect that the use of the faucet 1 has started when the flow rate at the relevant position becomes large, and to detect that the use of the faucet 1 has ended when the flow rate becomes small.

Each of the thermistors 12 and 13 is connected to the water heater 2, respectively.
Water temperature before and after (inlet water temperature and outlet temperature)
Each detection signal is supplied to the controller 7 via a signal line (not shown) and is used as a parameter for adjusting the thermal power.

The controller 7 controls the combustion amount by adjusting the opening degree of a fuel supply amount control valve (not shown), and also adjusts the opening degree of the flow rate control valve 14 as necessary to reduce the amount of hot water supplied. The water heater is controlled to supply hot water at a temperature of .

A temperature detection means 15 made of, for example, a thermistor is provided at the tip of the heat pipe 6, and its temperature detection output signal is supplied to the controller 7. Based on this temperature detection output signal, the controller 7 controls the floor heating. The structure is such that temperature control is performed.

The controller 7 also includes a setting device (not shown) including a switch and the like for setting whether or not to perform floor heating.

The controller 7 controls the on-off valves 8 and 9 and the circulation pump 10 based on the setting device and the signals described above.

Below, among the controls by this controller 7,
Control of the first and second on-off valves 8 and 9 and the circulation pump 10 will be explained.

In this embodiment, it is assumed that the hot water supply temperature by the water heater 2 and the set temperature for use of the floor heating (lower than the hot water supply temperature) are set constant in advance.

The control state of whether the first and second on-off valves 8 and 9 are opened or closed and whether the pump 10 is driven or stopped is determined based on the output signal of the flow rate detection means 11 when the faucet 1 is turned on or off. The setting device of the controller 7 determines whether or not the floor heating is in use, and when the floor heating is in use, the heat pipe 6 is controlled based on the output signal of the temperature detection means 15. Determined by whether or not heating is required. In this way, the control target is determined depending on whether or not the faucet 1 and floor heating are used. For example, if the first on-off valve 8 is opened when the faucet 1 is in use, the control target
If the first on-off valve 8 is closed and the pump 10 is left running, the second on-off valve 9 will be closed when the floor heating is not in use. Negative pressure is generated on the pump 10 side of the on-off valve 8, bubbles etc. are generated, and the pump 10
This is to eliminate problems such as an increase in the burden on users.

When conditions such as whether or not the water faucet 1 and floor heating are used are arranged based on the control purpose, the control state of the on-off valves 8 and 9 and the pump 10 is as follows.
Even when using floor heating using a setting device, when the heat pipe reaches the set temperature (for example, 40°C), the second on-off valve 9 is closed to stop heating the heat pipe, so this The case is the same as the case where the use of floor heating is not set by the setting device, and there are four types of control states in total. That is, when the faucet 1 is not in use and the heat pipe 6 is not heated (hereinafter referred to as the first state), when the faucet 1 is in use and the heat pipe 6 is not heated, the heat pipe 6 is not heated. 6 in which heating is not performed (hereinafter this state is referred to as the second state), and when the water faucet 1 is in use and the heat pipe 6 is heated (hereinafter this state is referred to as the third state). There are four states: when the faucet 1 is not in use and the heat pipe 6 is being heated (hereinafter referred to as the fourth state), and when the controller 7 detects each state, In the first state, the first on-off valve 8 is opened and the second on-off valve 9 is closed, and the circulation pump 10 is driven, and in the second state, the first on-off valve 8 and the second on-off valve 9 are opened. In the third state, the first on-off valve 8 is closed, the second on-off valve 9 is opened, and the circulation pump 10 is driven.
In this state, both the first on-off valve 8 and the second on-off valve 9 are opened, and the circulation pump 10 is driven.

FIG. 2 is a flowchart showing the above series of processes. This will be explained below.

First, when operation is started by a switch (not shown), the microcomputer first goes through step 1.
In the step (denoted as P1 in the figure; hereinafter step n will be denoted as Pn in the figure), parameters are initialized. Here, the parameters L and M indicate that the on-off valve is in the closed state when the parameter related to the opening and closing of the first and second on-off valves 8 and 9 is 0, and is in the open state when it is 1, respectively.
Further, the parameter N is a parameter related to driving or stopping the circulation pump, and when it is 0, the pump is in the stopped state, and when it is 1, it is shown that the pump is in the driving state. Then, in step 2, it is determined whether or not the floor heating switch is turned on in the setting device, that is, whether the floor heating is in use or not. 1 is in use. When the faucet is not in use, it is determined that it is in the first state, and when the first on-off valve 8 is in the open state in steps 4 to 6, the first on-off valve 8 remains open. When it is in the closed state, it is opened (hereinafter, such processing will be referred to as opening processing of the first on-off valve, and the reverse case will be referred to as closing processing). Then, in steps 7 and 8, the second on-off valve 9 is closed, and in steps 10 and 12, the circulation pump 10 is driven.

On the other hand, when it is determined in step 3 that the faucet 1 is in the use state, it is determined that the faucet 1 is in the second state, and in steps 13 to 15, the closing process of the first on-off valve is performed. step
In steps 16 to 18, the second on-off valve is closed, and in steps 19 to 21, the circulation pump 10 is stopped. On the other hand, if it is determined in step 2 that the floor heating is in use, the process proceeds to step 22, where it is determined whether or not the faucet 1 is in use. If the faucet 1 is in use, the process proceeds to step 23, where it is further determined whether the temperature of the heat pipe 6 is below the set temperature.
This determination is made based on the output signal of the thermistor 15. At this time, if the detected temperature of the heat pipe is not lower than the set temperature, it is determined that the second state is reached, and the process moves from step 13 to step 21 described above. On the other hand, in this step 23, if the detected temperature of the heat pipe is below the set temperature, it is necessary to heat the heat pipe, so the control state becomes the third state. Therefore, the first on-off valve is closed in steps 24 to 26, the second on-off valve is opened in steps 27 to 29, and the circulation pump is opened in steps 30 to 32. Driving processing will be performed.

Further, in step 22, if the water faucet 1 is not in use, the process proceeds to step 33, where it is determined whether the detected temperature of the heat pipe is below the set temperature or not, as in step 23. Ru. If the detected temperature of the heat pipe is not lower than the set temperature, it is determined that the object to be controlled is in the first state, and the above-described processing from step 4 onwards will be performed.

On the other hand, if the detected temperature of the heat pipe is lower than the set temperature, it is determined that the controlled object is in the fourth state, and thereafter, in steps 34 to 36, the opening process of the first on-off valve is performed in step 37. In steps 39 to 39, the second on-off valve is opened, and in steps 40 to 42, the circulation pump is driven. After the above-mentioned processing based on each controlled object has been carried out, it is determined in step 43 whether or not to continue operation based on signals from the operating switch, etc.
If it is determined to continue, go to step 2 again.
will return to.

In the above embodiments, control using a microcomputer has been described, but the above processing can be easily performed without using a microcomputer. For example, as shown in FIG. A detector 16 that outputs a high-level signal when in use, a switch detector 17 that outputs a high-level signal when the floor heating switch in the setting device is in the on state, and a heat pipe detection temperature and set temperature. A comparator 18 is provided which compares the detected temperature and outputs a high level signal when the detected temperature is lower than the set temperature. The circuit includes a drive coil 8a that opens the first on-off valve 8 when energized, a drive coil 9a that opens the second on-off valve 9 when energized, and a relay coil 1 that drives the circulation pump 10 when energized.
0a may be energized according to the output signal of this circuit.

(Effects of the invention) As is clear from the above explanation, according to this invention, hot water from the water heater, which is kept at a constant temperature, can be supplied to the floor heating piping, so it can be used at all times. It is possible to provide a floor heating system.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram showing the floor heating system according to this invention, Fig. 2 is a flowchart, and Fig. 3 is a diagram showing a flowchart.
The figure shows another embodiment of this invention. In the drawing, 1 is a faucet, 2 is a water heater, 3 is a circulation pipe, 3a is a hot water supply pipe, 3b is a return pipe, 4
is a floor heating pipe, 6 is a heat pipe, 7 is a controller, 8 is a first on-off valve, 9 is a second on-off valve, 10
11 is a circulation pump, 11 is a flow rate detection means, and 15 is a temperature detection means.

Claims (1)

[Scope of claim for utility model registration] Hot water piping that supplies hot water from a water heater to a faucet;
A return piping that returns the supplied hot water from the faucet side to the water heater is connected in a loop to form a circulation piping, and the circulation piping has a flow rate detection device for detecting whether or not the faucet is being used. providing a means for connecting a floor heating pipe having a heat pipe between the hot water supply pipe and the return pipe;
Temperature detection means for detecting the temperature of the heat pipe is provided, and a first return pipe is provided in the return pipe upstream of the connection part between the return pipe and the floor heating pipe and downstream of the water faucet.
an on-off valve is provided, a second on-off valve is provided on the floor heating pipe, and a circulation pump is provided for circulating hot water in the return pipe downstream of the connection between the return pipe and the floor heating pipe; Based on the output signals of the flow rate detection means and the temperature detection means, when the faucet is not in use and the heat pipe is not heated, the first on-off valve is opened and the second on-off valve is opened. and operating the circulation pump; when the water faucet is in use and the heat pipe is not being heated, the first on-off valve and the second on-off valve are closed; The circulation pump is stopped, and when the faucet is used and the heat pipe is heated, the first on-off valve is closed and the second on-off valve is opened, and the circulation pump is operated. and a controller that opens the first on-off valve and the second on-off valve and operates the circulation pump when the water faucet is not in use and the heat pipe is heated. A floor heating system featuring: