JPH07113458B2 - Hot water heating system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating device that heats hot water or heats a bath.

2. Description of the Related Art A conventional hot water heating system has a system as shown in FIG. 2, for example. A first load 1 such as a fan convector for heating a room or a bath heater for reheating a bath, and a heat exchanger 2 as a heat source device for heating hot water
Are connected via the first header 4 by the outward path 3. Further, the tank 5 and the first load 1 are connected by the return pipe 6 via the second header 7. Tank 5
A circulation pump 8 is provided between the heat exchanger 2 and the heat exchanger 2.
Further, a hot water detecting sensor 9 is attached to the outward conduit 3 near the discharge port of the heat exchanger 2. Reference numeral 10 is a control device, and the temperature detecting sensor 9 and a proportional valve 12 for controlling the amount of gas burned by the burner 11 are connected by a signal line.

The second load 13 such as floor heating is connected to the heat source device 14 via the first header 4 and the second header 7. It is possible to provide several of these loads in parallel via the header. A valve 15 is attached to the first load and a valve 16 is attached to the second load.

In the above, switch on the heat source device 14 (not shown),
When the valve 15 of the first load 1 is further opened, the hot water heated by the heat exchanger 2 is fed by the circulation pump 8,
It is sent to the first load 1 via the outgoing line 3 and the first header 4. Here, the heat of the hot water is released, further passes through the second header 7 and the return pipe 6, returns to the tank 5, and is heated again by the heat exchanger 2. Here, the heat exchanger 2
The amount of gas burned by the burner 11 detects the temperature of the circulating hot water by the temperature detection sensor 9 provided at the discharge port of the device and sends a signal to the control device 10 so that the temperature of the hot water becomes about 80 ° C. Controls the proportional valve 12 which changes. Further, when the valve 16 of the second load 13 such as floor heating is opened, the heat source device 14
Hot water is sent to the second load. The temperature of the hot water sent from the heat source device 14 to the first load 1 and the second load 13 is about 80 ° C.
Controlled by.

FIG. 3 shows another conventional example. The first load 1 and the second load 13 and the control device 10 in the heat source device 14 are connected by a signal line. The same parts as those in FIG. 2 are designated by the same reference numerals, detailed description thereof will be omitted, and different parts will be mainly described. In the above, when the switch (not shown) of the first load 1 such as the fan convector or the bath heater is turned on, the valve 15 is opened and a signal is sent to the control device 10 so that the temperature of the hot water becomes about 80 ° C. Control the amount of gas burned at 11. Next, when the first load 1 is stopped and the switch (not shown) for the second load 13 for floor heating is turned on, the valve
16 is opened, a signal is sent to the control device 10, the temperature of the hot water is about
The temperature is controlled to 60 ° C, and the second load 13 is fed. Further, when the first load 1 and the second load 13 are used at the same time, the temperature is either 60 ° C. or 80 ° C., and hot water of the same temperature is supplied to each load.

According to the configuration shown in FIG. 2, hot water having the same temperature of about 80 ° C. is supplied to the first load 1 and the second load 13 provided in parallel. The fan convector, which is the first load, heats the supplied hot water by changing the heat of the supplied hot water with a fan, and the bath heater exchanges the heat of the supplied hot water with the bath water. They are rehabilitated, neither of which touches humans directly, and the higher the temperature of the hot water, the greater the effect. However, since the floor load, which is the second load 13 that heats the floor by circulating hot water, is in direct contact with the human body, in the case of floor heating, circulating high-temperature water of about 80 ° C is too hot. There was a drawback.

According to the configuration shown in FIG. 3, the floor heating can be performed at an appropriate temperature by setting the temperature of the hot water to a low temperature of about 60 ° C. only when the floor heating is used, but when used together with the first load 1 such as the fan convector, Hot water of the same temperature will be supplied to each load. Sending hot water at 80 ° C has the drawback of being too hot when using floor heating, and sending hot water at 60 ° C feels a feeling of cool air when using a fan convector, and has a small capacity when using a bath heater. It takes a while to boil.

The present invention solves the above-mentioned problems of the conventional technology.When the loads are used simultaneously, or when they are used individually, hot water having a temperature corresponding to each load is fed to obtain an appropriate temperature. Provided is a hot water heating device capable of heating or hot water heating.

Means for Solving the Problems In order to solve the above problems, the present invention provides a heat exchanger for heating hot water, a circulation pump for feeding the hot water, a tank for supplying the hot water, the heat exchanger and the tank. To the first forward line and the return line. A first load that requires high-temperature water, a first temperature detection sensor provided in the first outward path near the discharge port of the heat exchanger, a water inlet of the heat storage heat exchanger, and the circulation pump. A second load connected to the heat exchanger and the tank 7 through a second forward line and a return line branched from the connection part of the second load requiring low-temperature water, the first forward line and the first load. A bypass line connecting the two forward lines, and a check valve that flows the hot water only from the first forward line to the second forward line provided in the bypass line,
A second temperature detection sensor provided on the second load side of the bypass line in the middle of the second outward line; and a branch point between the heat exchanger and the second temperature detection sensor in the middle of the second outward line. A water amount control valve provided between a branch point of the bypass pipe line, a first signal line for transmitting a signal for driving the heat source device from the first load, and a heat source device for driving the heat source device from the second load Of the first load and the second load to control the heating source of the heat exchanger and the water amount control valve, and the high temperature water for the first load and the low temperature water for the second load. Is configured to have a device for controlling so as to send.

Action In the above configuration, by installing the water flow control valve and the bypass pipe, the place where floor heating is used has low temperature water (about 60
℃), and when using fan convectors, etc., supply high temperature water (approx. 80 ° C), and even if floor heating and other high temperature water are used at the same time as the required load, two temperatures of high temperature water and low temperature water Can be sent at the same time. Therefore, the floor heating, which had been disadvantageous in that hot water was circulated until now, was too hot, or the two hot water could not be obtained at the same time when the fan convector and the floor heating were used at the same time, It is possible to supply both of them simultaneously.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. The same parts as those of the conventional example are designated by the same reference numerals, detailed description thereof will be omitted, and different parts will be mainly described. A second outward line 17 branched from the connection between the water inlet of the heat exchanger 2 and the circulation pump 8 and a second load 13 such as floor heating requiring low-temperature water via the return line 6 There is.

In addition, a check valve 19 that causes hot water to flow only from the first outward passage 3 to the second outward passage 17 is provided in the bypass passage 18 that connects the first outward passage 3 and the second outward passage 17. ing. Also, the second outgoing line 17
In the middle of the process, the branch point of the heat exchanger 2 and the bypass line 18
A stop valve 20 for controlling the flow of hot water is provided between the branch points of and. Further, the controller 21 provided in the second load 13 is connected to the control device 10 of the heat source machine by the second signal line 22. Further, the first load 1 requiring high temperature water is
It is connected to the heat source device 14 via the outward pipeline 3 and the return pipeline 6. A start / stop switch provided in the first load 1
23 is connected to the control device 10 of the heat source machine and the first signal line 24. In addition, in the second outgoing line 17, the second temperature detection sensor 25
Is provided on the second load 13 side from the branch point of the bypass conduit 18.

The operation of the above configuration will be described below. When the switch 23 of the first load 1 is turned on, a signal is sent to the control device 10 by the first signal line 24, the valve 15 is further opened, and the heat source device 14
More heated hot water is supplied. At this time, a signal is sent that the first load 1 that requires high-temperature water is being used, so that the hot water heated to about 80 ° C. from the heat exchanger 2 flows through the first outward path 3. It is delivered to the first load 1 via the. At this time, the water amount control valve provided in the second outward line 17
Since 20 is closed and the valve 16 attached to the second load 13 is closed, high temperature water does not flow to the second load 13. That is, the high temperature water is supplied only to the first load 1. The first loads 1 that require hot water can be mounted in parallel.

Next, when the first load 1 and the second load 13 such as floor heating are used at the same time, the controller 21 is turned on to open the valve 16 of the second load 13 and use the second load 13. A signal indicating that the signal is being transmitted is sent to the control device 10 via the second signal line 22. Second load because valve 16 opens
Although hot water is also sent to 13, the water flow control valve 20 is opened, so the second load 13 does not pass through the heat exchanger 2
The hot water flowing through 17 and the hot water flowing through the bypass pipe 18 are mixed and sent. At this time, since the signal that the first load 1 is being used is input, the temperature of the discharge port of the heat exchanger 2 is controlled to a high temperature (about 80 ° C), and the second load 1
The temperature of the hot water sent to 13 is heated to 80 ° C. by the heat exchanger 2 and the hot water returned from the first load 1 and the second load 13 not passing through the heat exchanger 2, and the bypass pipe 18 It becomes the mixed temperature of the hot water that came through.

The temperature of the hot water sent to the second load is detected by the second temperature detection sensor 25, and when it is lower than 60 ° C, the water flow control valve
By gradually closing 20 to reduce the flow rate of the hot water flowing into the second outgoing line 17 without passing through the heat exchanger 2, an appropriate amount of hot water of about 80 ° C. from the bypass line 18 is made to flow, Raises the temperature of the hot water sent to the load 13, and about 60
Control to ℃. That is, when the temperature of the hot water sent to the second load 13 is lower than 60 ° C., the hot water sent from the tank 5 is controlled by controlling the water amount control valve 20 and gradually closing the heat exchanger 2. Adjust the flow rate of to maintain the temperature of hot water at 60 ° C. Also,
When the temperature is higher than 60 ° C., the water amount control valve 20 is fully opened to increase the flow rate of the warm water flowing from the tank 5 to the second outward pipeline 17. At this time, the second outward pipeline 17 is passed through the bypass pipeline 18.
The temperature of the hot water that flows into the second load 13 does not rise because the resistance of the conduit is large, and the temperature of the hot water that flows into the second load 13 does not rise. From the above, the temperature sent to the second load 13 is maintained at 60 ° C and never falls below 60 ° C.

Further, in the first load, hot water of 80 ° C. is obtained via the first outward path 3 as described above. By the check valve 19 provided in the bypass pipe line 18, stable high temperature water is supplied without flowing into the first outward pipe line 3 from the second outward pipe line 17. That is,
Hot water of two temperatures can be obtained with one heat source machine.

Next, when the switch 23 of the first load 1 is turned off, the valve 15 is closed,
The supply of hot water to the first load 1 is stopped and only the second load 13 is supplied. In this case, a signal indicating that only the second load 13 is used is transmitted to the control device 10 via the second signal line 22. Then, the water amount control valve 20 is closed and the combustion is controlled so that the temperature of the hot water at the discharge port of the heat exchanger 2 becomes about 60 ° C. Therefore, the hot water sent to the second load 13 passes from the tank 5 through the heat exchanger 2, and then to the first outward conduit 3,
Hot water controlled at 60 ° C. is fed through the bypass line 18.

Further, when the first load 1 is used while the second load 13 is being used, the temperature of the hot water is raised from 60 ° C to 80 ° C and the water amount control valve 20 is opened to simultaneously cool the low temperature water and the high temperature water. Water can be delivered.

The above is the heat source device 14 using the first signal line 24 from the first load 1.
However, the first load 1 may not be provided with the switch for starting and stopping and the first signal line. In such a case, there is an additional remote controller (not shown), and when the switch is turned on, it is determined that the first load 1 is being used.

EFFECTS OF THE INVENTION As described above, according to the present invention, both high temperature water and low temperature water can be sent at the same time, so that hot water according to the load can be obtained. Therefore, until now, there was a drawback that it was too hot because high-temperature water was circulated when floor heating was used, but this is solved, and floor heating at an appropriate temperature becomes possible, and comfort is improved. Furthermore, even when both floor heating and fan convectors are used at the same time, both high-temperature water and low-temperature water can be obtained, which makes it possible to provide comfortable hot water heating compared to the conventional method. By sending it, heat dissipation loss is also reduced, leading to energy saving.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a hot water heating system according to an embodiment of the present invention, and FIGS. 2 and 3 are overall configuration diagrams of conventional hot water heating systems. 1 ... First load, 2 ... Heat exchanger, 3 ... First outward line,
5 ... Tank, 6 ... Return line, 8 ... Circulation pump, 9
...... First temperature detection sensor, 10 ...... Control device, 13 ...... Second load, 17 ...... Second forward line, 18 ...... Bypass line, 19 ...
… Check valve, 20… Water control valve, 22 …… Second signal line, 24…
… First signal line, 25 …… Second temperature detection sensor.

Claims (1)

[Claims] 1. A heat exchanger that heats hot water, a circulation pump that feeds the hot water, a tank that replenishes the hot water, and a first forward line and a return line to the heat exchanger and the tank. A first load that requires high-temperature water that is connected through the first heat exchanger and a first load that is provided in the first outward path near the discharge port of the heat exchanger.
A low temperature water is required by connecting to the heat exchanger and the tank via a second outward conduit and a return conduit branched from the connection between the temperature detecting sensor, the water inlet of the heat exchanger and the circulation pump. And a second load, the first forward path and the second
A bypass line connecting the outward lines, a check valve for flowing the hot water only from the first line provided in the bypass line to the second outward line, and the middle of the second outward line A second temperature detection sensor provided on the second load side with respect to the bypass pipe, and a branch point between the heat exchanger and the bypass pipe in the middle of the second outward pipe. A water amount control valve provided between the points, a first signal line for sending a signal for driving the heat source device from the first load, and a second signal line for sending a signal for driving the heat source device from the second load A signal line and signals of the first load and the second load control the heating source of the heat exchanger and the water amount control valve, and control to send high-temperature water to the first load and low-temperature water to the second load. Hot water heating system equipped with a device to operate.