JPH029335Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hot water boiler that uses a circulating pump to discharge hot water from the can body from the hot water outlet to the heating load side and returns it from the hot water return port. This is what we are trying to provide.

Conventionally, in this type of hot water boiler, as shown in FIG. Heat exchange pipes 222, 212 of fan convector 21
etc. are connected. By the way, floor heating panel 2
The optimum temperature of the heat exchange pipe 222 of the fan convector 2 is in a relatively low temperature range (36°C to 38°C).
Since it is desired that the first heat exchange pipe 212 has a relatively high temperature (80° C.), valves 211 and 221 are provided on the outlet side of the hot water outlet 81 to control the heating load temperature.

Therefore, if the temperature of the hot water flowing into the heat exchange pipe 212 of the fan convector 21 is set to a relatively high temperature, for example, the upper limit temperature is set to 80°C as shown in FIG. It becomes necessary to frequently operate the valve 221 installed in the valve 221. For example, if the temperature is controlled by controlling the valve 221 on/off or opening with a solenoid, the fluctuations in the temperature of the inflowing water will be affected by the fluctuations shown in Fig. 3. This causes problems in terms of comfort.
Of course, even if the valve opening is controlled by a motor, the fluctuations in hot water temperature will not be reduced so much.

The present invention has been developed in view of the above points, and its purpose is to circulate hot water of different temperatures so that the temperatures of different types of heating loads do not fluctuate too much.

Embodiments of the present invention will be described below in Figures 4 to 9.
This will be explained with reference to the figures.

First, the main structure will be explained using FIG. 4, which is a schematic cross-sectional view of a basic embodiment. 1 is a hollow can housing hot water in a hot water storage section 13 between inner and outer cylinders 11 and 12. A burner 3 is attached to the upper opening 2 of the can body 1, and the tip of the burner 3 faces a combustion chamber 4 which is a hollow part of the can body 1. Further, an exhaust pipe 5 is provided in parallel with the burner 3 provided at the upper part of the can body 1, so that exhaust gas from the combustion chamber 4 can be discharged to the outside. Note that an exhaust gas guide plate 6 is vertically installed in the combustion chamber 4, and guides the exhaust gas in a U-shape to reach the exhaust stack 5. In addition, a tank 7 is provided at the bottom of the can body 1, and the inner and outer cylinders 11, 12 of the can body 1 are provided with a tank 7.
The tank 7 communicates with a hot water storage section 13 between the two, and the flexibility of the built-in bellows 71 serves to absorb volumetric expansion caused by boiling of hot water or the like.

Furthermore, the can body 1 is provided with two branched hot water discharge ports 81 and 82 at the upper side, and a hot water return port 9 is provided at the lower side, and these hot water discharge ports 8
1 , 82 and the hot water return port 9 communicate with the hot water storage section 13 of the can body 1 .

Further, a bypass pipe 10 is connected between the hot water return port 9 and one of the hot water discharge ports 82 , and the hot water discharge port 82 side of the bypass pipe 10 is connected to the hot water discharge port 82 .
It protrudes to the inside of the. Therefore, at the hot water outlet 82 to which the bypass pipe 10 is connected, the hot water flowing through the outlet 82 and the hot water flowing through the bypass pipe 10 are mixed to produce mixed water.

On the other hand, the bypass pipe 1 at the hot water return port 9
A circulation pump 14 is provided in front of the inlet of the hot water outlet 82, and a heat exchange pipe 222 of the floor heating panel 22, which requires relatively low-temperature hot water, is provided at one hot water outlet 82.
One end is connected to the distributor 17 via the distributor 17, and the other end of the heat exchange pipe 212 built into the fan convector 21, which requires relatively high temperature hot water, is connected to the distributor 16. connected via. And the floor heating panel 22 and the fan convector 21
The other ends of the heat exchange pipes 222 and 212 are connected to the header 1.
8 to a hot water return port 9. Therefore, when the circulation pump 14 is operated, the hot water contained in the can body 1 is discharged from the hot water discharge ports 81 and 82 to the fan convector 21 as a heating load and the heat exchange pipes 212 and 222 of the floor heating panel 22, and the hot water is The hot water storage section 1 of the can body 1 is returned from the return port 9.
Return to 3. Since the fan convector 21 has a built-in blower 213, the blower 21
By controlling the speed in step 3, appropriate hot air heating can be performed.

Further, a temperature sensor 15 for controlling the hot water temperature is inserted into the upper part of the hot water storage section 13 of the can body 1, but in the embodiment, the temperature sensor 15 is inserted into the fan convector 2.
Burner 3 is controlled to burn so that the upper limit of the temperature of hot water flowing into heat exchange pipe 212 of No. 1 is 80°C.

By the way, valves 211 and 221 are installed at the inlet of the heat exchange pipe 212 of the fan convector 21 and the inlet of the heat exchange pipe 222 of the floor heating panel 22, respectively.
is provided to start and stop the inflow of hot water and to control the flow rate of hot water, but in the following explanation, the valve 21
1, 221 is assumed to be open with a constant opening degree.

In the embodiment configured as described above, when the burner 3 is operated, hot water at a predetermined temperature is stored in the hot water storage portion 13 of the can body 1 by the action of the temperature detector 15. When the circulation pump 14 is operated at this time, high-temperature hot water flows into the heat exchange pipe 212 of the fan convector 21 from one hot water outlet 81, and the temperature of the inflow water is equal to the temperature of the hot water in the hot water storage section 13 of the can body 1. For example, as shown in Figure 8, the upper limit temperature is 80°C and the lower limit temperature is 70°C.

On the other hand, at the hot water outlet 82 connected to the bypass pipe 10, the hot water flowing through the outlet 82 and the low temperature water flowing through the bypass pipe 10 are mixed to produce mixed water, which is discharged from the hot water outlet 82. The hot water is at a lower temperature than the hot water discharged from the other hot water discharge port 81.

Therefore, the heat exchange pipe 2 of the floor heating panel 22
As shown in Fig. 9, the temperature of the hot water flowing into the hot water tank 22 has an upper limit of 50°C and a lower limit of 40°C, allowing comfortable floor heating.

By the way, in the embodiment described above, the bypass pipe line 10
If the temperature or flow rate of the return hot water flowing into the hot water outlet fluctuates, or if the temperature of the mixed water fluctuates due to outside air temperature, etc., the temperature of the hot water discharged from the hot water outlet 82 will become unstable. As shown, a flow rate control valve 19 is provided in the bypass pipe 10, and the opening degree of the flow rate control valve 19 is controlled by a control circuit 20 including a temperature sensor 201 inserted into the discharge side of the hot water discharge port 82. Since the temperature of the mixed water is constantly feedback-controlled, hot water at a stable temperature can be supplied from the hot water outlet 82 to the heat exchange pipe 222 of the floor heating panel 22.

Furthermore, as shown in FIG.
If the heating load, that is, the opening degree of the heat exchange pipe 222 of the floor heating panel 22 is controlled by the control circuit 23 including the temperature detector 231 installed in the heat exchange pipe 222 of the floor heating panel 22, at the start of heating, Since the temperature is low and the flow control valve 19 is closed, the temperature of the floor heating panel 22 can be quickly raised to a predetermined temperature. Of course, if the heat exchange pipe 222 of the floor heating panel 22 reaches a predetermined temperature or higher, the flow rate control valve 19 will open according to the temperature.
The returned hot water is discharged to the hot water outlet 82 through the bypass pipe line 10. Therefore, the floor heating panel 22 is maintained at a substantially constant temperature.

Finally, as shown in Figure 7, the floor heating panel 22
If the opening of the flow control valve 19 is controlled by the control circuit 24 including the temperature sensor 241 installed in the atmosphere of Therefore, the atmosphere of the floor heating panel 22 can be quickly heated to a predetermined temperature. Of course, if the atmosphere reaches a predetermined temperature or higher, the flow rate control valve 19
has an opening degree according to the temperature, and discharges the return hot water to the hot water outlet 82 through the bypass pipe line 10.
Therefore, the atmosphere of the floor heating panel 22 is maintained at a comfortable temperature.

Furthermore, since the circulation pump 14 is disposed in front of the inlet of the bypass pipe 10 at the hot water return port 9, it is possible to discharge hot water to both the bypass pipe 10 and the hot water discharge ports 81 and 82 with one pump. be.

As described above, the present invention provides a hot water boiler in which the circulating pump 14 discharges hot water contained in the can body 1 from the hot water outlet to the heating loads 21, 22... side, and returns it from the hot water return port 9 to the can body 1. A plurality of hot water discharge ports 81, 82... are provided, and each discharge port 81, 82...
Heating loads 21, 22, . The hot water flowing through the outlet 82 and the hot water flowing through the bypass pipe 10 are mixed to generate mixed water, and the mixed water is discharged at a lower temperature than the hot water at the hot water outlet to which the bypass pipe 10 is not connected. This hot water boiler has excellent practical effects, such as significantly reducing temperature fluctuations of different types of heating loads.

[Brief explanation of the drawing]

Figure 1 is a schematic sectional view showing a conventional hot water boiler.
Figure 2 is a temperature characteristic diagram showing the control status of the temperature of hot water flowing into the heat exchange pipe of the fan convector in a conventional boiler, and Figure 3 is the temperature of hot water flowing into the heat exchange pipe of the floor heating panel in a conventional boiler. FIG. 4 is a schematic cross-sectional view showing one embodiment of the hot water boiler of the present invention, FIG. 5 is a schematic cross-sectional view of main parts showing another embodiment of the present invention, and FIG. Similarly, FIG. 7 is a schematic cross-sectional view of the main parts showing still another embodiment of the present invention, and FIG. 8 is a schematic cross-sectional view of the main parts showing still another embodiment of the present invention. FIG. 9 is a temperature characteristic diagram showing the control state of the temperature of hot water flowing into the heat exchange pipe. FIG. 9 is a temperature characteristic diagram showing the control state of the temperature of hot water flowing into the heat exchange pipe of the floor heating panel in the hot water boiler of the present invention. 1...Can body, 11...Inner cylinder, 12...Outer cylinder, 1
3...Hot water storage section, 2...Top opening, 3...Burner, 4...Combustion chamber, 5...Exhaust pipe, 6...Guide plate, 7...Tank, 71...Bellows, 81...
Hot water outlet, 82...Hot water outlet, 9...Hot water return port, 10...Bypass pipe, 14...Circulation pump, 15...Temperature detector, 16...Distributor, 17...Distributor Utah, 18...
Header, 19...Flow rate control valve, 20...Control circuit, 201...Temperature detector, 21...Fan convector, 211...Valve, 212...Heat exchange pipe, 213...Blower, 22...Floor Heating panel, 221... Valve, 222... Heat exchange pipe, 23... Control circuit, 231... Temperature detector, 24... Control circuit, 241... Temperature detector.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a hot water boiler in which hot water contained in a can body is discharged from a hot water discharge port to a heating load side by a circulation pump and returned from a hot water return port, a plurality of hot water pipes are provided in the can body. A discharge port is provided, a heating load is connected to each discharge port, and a bypass pipe is connected between the hot water return port and at least one hot water discharge port, and the hot water discharge port to which the bypass pipe is connected is connected to a heating load. The hot water flowing through the outlet and the hot water flowing through the bypass pipe are mixed to produce mixed water, and the mixed water is discharged at a lower temperature than the hot water at the hot water outlet to which the bypass pipe is not connected. Characteristic hot water boiler. (2) The hot water boiler according to claim 1, wherein the circulation pump is disposed in front of the inlet of the bypass pipe at the hot water return port. (3) The hot water boiler according to claim 1 or 2, wherein a flow control valve is provided in the bypass pipe. (4) The hot water boiler according to claim 3, wherein the flow rate control valve detects the temperature of the mixed water and controls the flow rate. (5) The hot water boiler according to claim 3, wherein the flow rate control valve controls the flow rate by detecting the hot water temperature of the heating load through which the mixed water flows. (6) The hot water boiler according to claim 3, wherein the flow rate control valve controls the flow rate by detecting the ambient temperature of the heating load through which the mixed water flows.