JPH09318083A - Hot water circulating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent hot water from a hot water mixing device from making a short pass at the time of starting operation and improve and stabilize temperature raising characteristics and hot water flow of a low temperature side radiator. SOLUTION: This hot water circulating apparatus comprises a first hot water return pipe 34 and a first hot water supply pipe 33 for circulating hot water from a heating boiler 21 to high temperature side radiators 22, 23 and a hot water circulating device 27 for supplying the hot water to low temperature side radiators 24-26. A second hot water supply pipe 48 connecting the first hot water supply pipe and the low temperature side radiator with each other, a second hot water return pipe 49 connected between the low temperature side radiator and the first hot water return pipe, a circulating pump 50 provided in the second hot water supply pipe or the second hot water return pipe for supplying the hot water to the low temperature side radiator, a communicating pipe 51 for allowing the second hot water supply pipe and the second hot water return pipe to communicate with each other, a hot water mixing device 52 provided between the second hot water supply pipe and the communicating pipe 51 for mixing the hot water which has radiated heat in the low temperature side radiator with high temperature hot water from the first hot water supply pipe to supply the mixed hot water to the low temperature side radiator and a check valve (X) for allowing to flow from the second hot water supply pipe only to the hot water mixing device are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water circulating device for circulating appropriate temperature water to a radiator on a low temperature side such as a floor heating panel.

[0002]

2. Description of the Related Art Conventionally, a hot water circulating apparatus for circulating high temperature water supplied from a hot water supply source to a temperature suitable for a radiator on a low temperature side such as a floor heating panel is disclosed in Japanese Utility Model No. 7-
It is disclosed in Japanese Patent No. 31045.

As shown in FIG. 4, the conventional structure described above has a first hot water storage can 1 as a hot water supply source, and a first hot water storage can 1 and a high temperature side radiator 2 such as a fan convector. Between the 1 warm water going pipe 3 and the 1st warm water returning pipe 4, the 1st circulation pump 5 which is interposed in the 1st warm water going pipe 3, the hot water storage can 1 and the low temperature side radiator 6 such as floor heating panel A second hot water going pipe 7 and a second hot water return pipe 8 connected to each other; a connecting pipe 9 for connecting the second hot water going pipe 7 and the second hot water return pipe 8;
A hot water mixing device 10 such as a mixing valve provided at a connection portion between the hot water outflow pipe 7 and the communication pipe 9, and a second hot water outflow pipe 7
The second circulation pump 11 installed in the housing was housed in the exterior case 12 of the heating boiler. Then, the high temperature water (about 80 ° C.) from the hot water storage can 1 is circulated and supplied to the high temperature water side radiator 2 by the first circulation pump 5, while the high temperature water from the hot water storage can 1 and the low temperature side radiator 6 are radiated. Facility water (about 30
℃) is mixed with the hot water mixing device 10 to obtain low temperature water (about 60
C.) and circulating this low-temperature water to the low-temperature radiator 6 by the second circulation pump 11, it is possible to circulate hot water at two temperatures suitable for the high-temperature radiator 2 and the low-temperature radiator 6, respectively. .

[0004]

By the way, in the above-mentioned conventional structure, the pressure balance between the second warm water outflow pipe 7 and the second warm water return pipe cannot be maintained for a predetermined time when the operation of the second circulation pump is started. Therefore, a part of the high-temperature water flowing through the second hot water outflow pipe 7 flows from the hot water mixing device 10 to the communication pipe 9 side, and
Since the hot water return pipe 8 is short-passed and the circulation amount of the hot water flowing to the low temperature side radiator 6 side cannot be sufficiently secured, the low temperature side radiator 6
Has a problem that it takes a long time to rise to a predetermined temperature and that the circulation flow rate to the low temperature side radiator 6 becomes unstable.

The present invention has been made in view of the above-mentioned circumstances, prevents short-path of high-temperature water from the hot-water mixing device at the time of starting operation, and improves the temperature rise characteristic of the low-temperature radiator, and The purpose is to always stabilize the flow rate of hot water supplied to the low temperature side radiator.

[0006]

According to the present invention as set forth in claim 1, high temperature water from a heating boiler is connected to a first hot water going pipe and a first hot water return pipe for circulating high temperature water to a high temperature side radiator, and low temperature A hot water circulating device for circulating hot water for heating to the side radiator, the second hot water outlet pipe being connected between the first hot water outlet pipe and the low temperature side radiator, the low temperature side radiator and the first A second warm water return pipe connected to the warm water return pipe, a circulation pump provided in the second warm water return pipe for feeding warm water to the low temperature side radiator, a second warm water return pipe and a second warm water return pipe. The hot water radiated by the low temperature side radiator is mixed with the hot water from the first hot water outgoing pipe, which is provided at the connecting part of the connecting hot pipe and the second hot water outgoing pipe and the hot pipe. The hot water mixing device for flowing and the hot water from the second hot water return pipe, which is provided in the middle of the connecting pipe, A configuration in which a check valve to flow only to the side.

According to the second aspect of the present invention, the low temperature side radiator is connected to the first hot water going pipe and the first hot water return pipe for circulating the high temperature water from the heating boiler to the high temperature side radiator for heating. A hot water circulating device that circulates the hot water, and a second hot water outgoing pipe connected between the first hot water outgoing pipe and the low temperature side radiator, and between the low temperature side radiator and the first hot water return pipe. A second hot water return pipe connected to the second hot water return pipe, a circulation pump that is provided in the second hot water return pipe and sends hot water to the low temperature side radiator, and a communication pipe that connects the second hot water return pipe and the second hot water return pipe, A hot water mixing device which is provided at a connection portion between the second hot water outgoing pipe and the communication pipe, and mixes hot water radiated by the low temperature side radiator with the high temperature water from the first hot water outgoing pipe and supplies the hot water to the low temperature radiator. Reverse installed in the middle of the connecting pipe to flow hot water from the second hot water return pipe only to the hot water mixing device side And a valve, the said hot water mixing device is configured to thermo mixing valve is used.

In the hot water circulation system according to the first aspect, at the start of operation of the circulation pump, the high temperature water from the heating boiler that has flowed into the second hot water outflow pipe is supplied to the check valve of the check valve provided in the middle of the connecting pipe. By the function, all is supplied to the low temperature side radiator without flowing from the warm water mixing device to the connecting pipe side and short-circuiting to the second warm water return pipe, so that the temperature rising characteristic of the low temperature side radiator becomes good and It is possible to constantly stabilize the flow rate of hot water supplied to the low temperature side radiator.

In the hot water circulation device according to the second aspect of the present invention, since the thermomixing valve is used in the hot water mixing device, depending on the temperature of the hot water flowing toward the radiator on the low temperature side, the boiler for heating is heated. It is possible to automatically change the mixing ratio of the hot water sent and the hot water after heat dissipation in the low temperature radiator, regardless of the load on the low temperature radiator increasing or decreasing. Can be kept substantially constant with high accuracy.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall configuration diagram of a hot water heating system using a hot water circulating device according to the present invention. The hot water heating system 20 includes a high temperature water supply type heating boiler 21 installed outdoors and indoors. A fan convector (high-temperature side radiator) 22 that is installed to perform warm air heating, a panel radiator (high-temperature side radiator) 23 that is installed in front of a wall in the room to perform radiant heating, and a plurality of floors inside the room, respectively. Floor heating panels (low temperature side radiators) 24, 25, 26 that are laid and perform radiant heating
And a hot water circulation device 27. The heating boiler 21 circulates and supplies a burner 28 for burning petroleum fuel, a hot water storage can 29 that generates high temperature water (about 80 ° C.) by the combustion heat of the burner 28, and high temperature water generated in the hot water storage can 29. It has a first circulation pump 30 and the like, which are incorporated in an outer case 31.

In the hot water storage can 29 of the heating boiler 21,
A first hot water outflow pipe 33 having a plurality of first outlet headers 32, and a first having a plurality of first return headers 34
The warm water return pipes 35 are respectively connected. In addition, the first forward header 32 and the first return header 34,
First return piping 36, 37, 38 and first return piping 39,
The fan convector 22, the panel radiator 23, and the hot water circulating device 27 are connected in parallel via 40 and 41, respectively. Reference numeral 42 is a manual on-off valve provided in the first forward pipe 38 near the first forward header 32.

Next, the hot water circulating device 27 of the present invention will be described in detail. As shown in FIGS. 2 and 3, the hot water circulation device 27 is a main body formed in a box shape with a bottom plate 43, a peripheral side plate 44, a top plate 45, and a removable front plate 46 that covers one open surface. It has a case 47. The hot water circulation device 27 is connected to the first hot water going pipe 33 through the first going pipe 38 and the first going header 32.
The hot water return pipe 48, a second hot water return pipe 49 connected to the first hot water return pipe 35 via the first return pipe 41 and the first return header 34, and the second hot water return pipe 48 are provided. Second circulation pump 50 and the second hot water outflow pipe 48
A communication pipe 51 for connecting the second hot water return pipe 49 to the second hot water return pipe 49;
Approximately 30 ° C after being radiated by the floor heating panels 24, 25, 26 provided at the connection between the hot water outflow pipe 48 and the communication pipe 51
Of the low temperature water of about 80 ° C. sent from the first hot water outflow pipe 33 and flowing to the floor heating panels 24, 25, 26 such as a wax mixing thermomixing valve (hot water mixing device) 52, It is built in the main body case 47 to form a unit.

A plurality of second forward headers 53 are attached to the downstream end of the second hot water return pipe 48, while an upstream end of the second hot water return pipe 49 is provided. ,
A plurality of second return headers 54 with flow rate adjusting valves are attached. As shown in FIG. 2, one end of each of the second forward header 53 and the second return header 54 is attached to the inner surface of the peripheral side plate 44 of the main body case 47 and has a substantially L-shaped cross section. Supported at 55, and
The other end is supported by the peripheral side plate 44 of the main body case 47. Further, the connection ports 56, 56, 57, 57 of the second forward header 53 and the second return header 54 are respectively shown in FIG.
As shown in FIG. 5, the peripheral side plate 44 of the main body case 47 is exposed to the outside. 48A is an inlet connection portion of the second hot water return pipe 48, and 49A is an outlet connection portion of the second hot water return pipe 49.

The thermomixing valve 52 has a first
It has an inflow port 52A, a second inflow port 52B, and an outflow port 52C. The second inflow port 52B is connected to the second hot water outflow pipe 48 on the side of the inlet connection part 48A to the first inflow port 52A. The communication pipe 51 is connected, and the second hot water outflow pipe 48 on the second circulation pump 50 side is connected to the outlet 52C. Then, the thermomixing valve 52 changes the valve opening degree of the first inflow port 52A and the second inflow port 52B according to the temperature of the hot water flowing through the outflow port 52C by the action of the wax that expands and contracts according to the temperature, By automatically adjusting the mixing ratio of the hot water of about 80 ° C. entering from the first inlet 52A and the hot water of about 30 ° C. entering from the second inlet 52B after heat dissipation,
The temperature of the hot water flowing out from the outlet 52C is kept at about 60 ° C. Further, a check valve X is provided at an appropriate position on the way of the communication pipe 51 so that the hot water from the second hot water return pipe 49 is allowed to flow only to the second inlet 52B of the thermomixing valve 52.

Reference numerals 61, 62 and 63 denote second forward pipes connected between the second forward header 53 and the floor heating panels 24, 25 and 26, and 64, 65 and 66 denote the floor heating panel 2.
Second return pipes 67, 68 connected between the fourth return header 54 and the second return header 54 are water drain plugs provided in the second forward header 53 and the second return header 54, respectively.

The hot water circulation device 27 according to the present invention is constructed as described above, and the installation work of the hot water circulation device 27 will be described below. The hot water circulation device 27 is usually installed near the heating boiler 21. And
When the hot water circulation device 27 is installed near the heating boiler 21, one of the connection ports of the first forward header 32 and the inlet connection portion 48A of the second hot water forward pipe 48 are connected to the first forward pipe 38.
, And one of the connection ports of the first return header 34 and the outlet connection part 49A of the second hot water return pipe 49 are connected to the first return pipe 41.
Connect with the second forward header 53 and the second return header 5
The connection ports 56, 56, 57, 57 of No. 4 and the floor heating panels 24, 25, 26 laid in a plurality of rooms, respectively, the second outgoing pipes 61, 62, 63 and the second return pipe 6
Piping work is completed by connecting with 4, 65, 66.

Next, the overall operation of the hot water heating system 20 will be described. When the entire hot water heating system 20 is in operation, the manual on-off valve 42 is opened, and when the first circulation pump 30 of the heating boiler 21 starts operating in that state, it is generated in the hot water storage can 29 by the combustion of the burner 28. The generated high-temperature water of about 80 ° C. is supplied to the fan convector 22 and the panel radiator 23, and heating by convection or radiation is performed. Further, when the second circulation pump 50 of the hot water circulation device 27 starts operating, the high-temperature water that has flowed into the second hot water outgoing pipe 48 via the first hot water outgoing pipe 33 and the first outgoing pipe 38 becomes the floor heating panel 24. , 25, and 26, and mixed with warm water (for example, warm water of about 30 ° C.) after radiating that has flowed through the second warm water return pipe 49 and the communication pipe 51 by the thermomixing valve (warm water mixing device) 52, The warm water of 60 ° C. passes through the second circulation pump 50, the second forward header 53, and the second forward pipes 61, 62, 63, and the floor heating panel 2
It is supplied to 4, 25, and 26, and floor heating is performed.

According to this embodiment, the heating boiler 21
To the fan convector 22 and the panel radiator 23 (both high temperature side radiators) for circulating the high temperature water of about 80 ° C. from the first hot water return pipe 36 and the first hot water return pipe 33 to the first forward pipe 38 and the first return pipe. A hot water circulation device 27 that is connected through a pipe 41 and circulates hot water for heating to the floor heating panels 24, 25, 26 (low temperature side radiators). The hot water circulation device 27 is a first hot water outflow pipe. 36 and floor heating panel 2
Second hot water outflow pipe 48 connected between 4, 25 and 26
And the floor heating panels 24, 25, 26 and the first hot water return pipe 3
Second hot water return pipe 49 connected to 5 and second hot water forward pipe 48, and second circulation pump 50 for sending hot water to floor heating panels 24, 25, 26, and second hot water forward pipe. A connecting pipe 51 connecting the 48 and the second warm water return pipe 49;
The hot water (for example, about 30 ° C.) after being radiated by the floor heating panels 24, 25, and 26 provided at the connection portion between the second hot water outgoing pipe 48 and the communication pipe 51 is fed from the first hot water outgoing pipe 33 to the first hot water outgoing pipe 33.
A thermomixing valve 52 that mixes with high temperature water of about 80 ° C. that has flowed to the upstream side of the second warm water upstream pipe through the upstream pipe 38 and that flows to the floor heating panels 24, 25, 26 as low temperature water of approximately 60 ° C. It is provided at a proper place on the connecting pipe 51,
Since the check valve X that causes the hot water from the second warm water return pipe 49 to flow only to the second inlet port 52B of the thermomixing valve 52 is interposed, when the operation of the second circulation pump 50 is started, The high-temperature water of about 80 ° C. from the heating boiler 21 that has flowed into the hot water outflow pipe 48 is supplied to the second side of the thermomixing valve 52 by the check valve X provided in the middle of the communication pipe 51.
All the floor heating panels 2 do not flow from the inflow port 52B to the connecting pipe 51 side and short pass to the second warm water return pipe 49.
4, 25, 26 (heat radiator on the low temperature side), the floor heating panels 24, 25, 26 can have good temperature rising characteristics, and the floor heating panels 24, 25, 26 can be operated while the second circulation pump 50 is in operation. The flow rate of hot water supplied to the heating panels 24, 25, 26 can be constantly stabilized.

Since the thermomixing valve 52 is used as the hot water mixing device, the floor heating panel 24,
In accordance with the temperature of the hot water flowing through the outlet 52C toward 25, 26, the mixing ratio of the hot water sent from the heating boiler 21 and the hot water after heat radiation in the floor heating panels 24, 25, 26 is automatically adjusted. Can be changed, floor heating panel 24, 2
The floor heating panel 24, regardless of the load increase or decrease of 5, 26,
It is possible to maintain the temperature of the hot water flowing toward 25 and 26 at an appropriate temperature of about 60 ° C. with high accuracy.

In the embodiment described above, after the hot water circulation device 27 is installed near the heating boiler 21, the inlet connection portion 48A of the second hot water outgoing pipe 48 is connected to the first outgoing header 32. Connect to one of the ports via the first outflow pipe 38, and connect the outlet connection portion 49A of the second warm water return pipe 49 to
The first outgoing pipe 4 is connected to one of the connection ports of the first return header 34.
The hot water circulating device 27 is connected to the high temperature water supplying type heating boiler 21 having no hot water function by connecting the hot water circulating device 27.
By connecting the two hot water functions, the two hot water function can be easily provided, and the two hot water function can be selectively obtained according to the customer's need.

Further, the second warm water outflow pipe 48, the second warm water return pipe 49, the connecting pipe 51, the thermomixing valve 52, and the second circulation pump 50 as the two warm water function imparting parts are connected to each other to form one main body case. Since it is built into 47 and unitized, installation work, piping work, etc. can be performed easily.

A plurality of second forward headers 53 are attached to the downstream end of the second hot water outlet pipe 48 contained in the main body case 47, while a second hot water return pipe 49 is provided.
Since a plurality of ports of the second return header 54 with a flow rate adjusting valve are attached to the upstream end of the floor heating panel 24 of a plurality of sets (for example, 3 to 4 sets) laid in a plurality of rooms,
Not only can it easily handle 25 and 26, it is also excellent in piping workability, and the piping length can be shortened as much as possible, and heat dissipation loss can be suppressed.

[0023]

As described above, according to the hot water circulation device of the present invention, the hot water from the heating boiler is connected to the first hot water outflow pipe and the first hot water return pipe for circulating the high temperature water to the high temperature side radiator, A hot water circulating device for circulating hot water for heating to a low temperature side radiator, comprising: a second hot water going pipe connected between the first hot water going pipe and the low temperature side radiator; 1
A second warm water return pipe connected to the warm water return pipe, a circulation pump provided in the second warm water return pipe for feeding warm water to the low temperature side radiator, a second warm water return pipe and a second warm water return pipe. The hot water radiated by the low temperature side radiator is mixed with the hot water from the first hot water outgoing pipe, which is provided at the connecting part of the connecting hot pipe and the second hot water outgoing pipe and the hot pipe. The hot water mixing device at the start of the operation has a configuration including a flowing hot water mixing device and a check valve which is provided in the middle of the communication pipe and flows the hot water from the second hot water return pipe only to the hot water mixing device side. It is possible to prevent the short path of the high temperature water from the above, to improve the temperature rise characteristic of the low temperature side radiator, and to always stabilize the flow rate of the hot water supplied to the low temperature side radiator.

In the hot water circulation device according to the second aspect of the present invention, since the thermomixing valve is used in the hot water mixing device, depending on the temperature of the hot water flowing toward the radiator on the low temperature side, the heating boiler is operated. It is possible to automatically change the mixing ratio of the hot water sent and the hot water after heat dissipation in the low temperature radiator, regardless of the load on the low temperature radiator increasing or decreasing. Can be kept substantially constant with high accuracy.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a hot water heating system using a hot water circulating device according to the present invention.

FIG. 2 is a vertical cross-sectional view of a hot water circulation device according to an embodiment of the present invention.

FIG. 3 is an external perspective view of the hot water circulation device.

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

 21 heating boiler 22 fan convector (high temperature side radiator) 23 panel radiator (high temperature side radiator) 24 floor heating panel (low temperature side radiator) 25 floor heating panel (low temperature side radiator) 26 floor heating panel (low temperature side heat radiation) 27) Hot water circulation device 33 First hot water return pipe 35 First hot water return pipe 48 Second hot water return pipe 49 Second hot water return pipe 50 Second circulation pump (circulation pump) 51 Communication pipe 52 Thermo mixing valve (hot water mixing device) ) X check valve

Claims (2)

[Claims] 1. Hot water circulation, which is connected to a first hot water outflow pipe and a first hot water return pipe that circulate high temperature water from a heating boiler to a high temperature side radiator, and circulates hot water for heating to a low temperature side radiator. A device, comprising: a second hot water outgoing pipe connected between the first hot water outgoing pipe and the low temperature side radiator; and a second hot water return pipe connected between the low temperature side radiator and the first hot water return pipe. And the second
A circulation pump provided in the hot water outflow pipe for sending hot water to the radiator on the low temperature side, a connection pipe for connecting the second hot water outflow pipe and the second hot water return pipe, and a connection portion between the second hot water outflow pipe and the connection pipe And a hot water mixing device that mixes the hot water radiated by the low temperature side radiator with the high temperature water from the first hot water outflow pipe to flow to the low temperature side radiator, and the second hot water provided in the middle of the communication pipe. A hot water circulating device, comprising: a check valve that allows hot water from a return pipe to flow only to the hot water mixing device side. 2. Hot water circulation, which is connected to a first hot water outflow pipe and a first hot water return pipe that circulate high temperature water from a heating boiler to a high temperature side radiator, and circulates hot water for heating to a low temperature side radiator. A device, comprising: a second hot water outgoing pipe connected between the first hot water outgoing pipe and the low temperature side radiator; and a second hot water return pipe connected between the low temperature side radiator and the first hot water return pipe. And the second
A circulation pump provided in the hot water outflow pipe for sending hot water to the radiator on the low temperature side, a connection pipe for connecting the second hot water outflow pipe and the second hot water return pipe, and a connection portion between the second hot water outflow pipe and the connection pipe And a hot water mixing device that mixes the hot water radiated by the low temperature side radiator with the high temperature water from the first hot water outflow pipe to flow to the low temperature side radiator, and the second hot water provided in the middle of the communication pipe. A hot water circulating device, comprising: a check valve for flowing hot water from a return pipe only to the hot water mixing device side, wherein a thermomixing valve is used in the hot water mixing device.