JPH11108377A - Hot-water heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To circulate hot water at temperature in response to a temperature requirement characteristic even when a plurality of different radiators are connected by providing on a hot water circulation passage a plurality of hot water circuits where temperatures of hot waters suppllied to the respective radiators are different. SOLUTION: In a hot water heating system 1, hot water produced in a hot water boiler 2 is circulated in a hot water circulation passage 6 with a circulation pump 5. On the circulation passage 6 there is provided a radiator 8 composed of the radiators 7a to 7c such as a fan convector and a floor heating panel. These instruments require hot waters at different temperatures. In response to such a different temperature requirement characteristics of the radiators, a hot water passage of the hot water circulation passage 6 is divided into two forward passages 9a, 9b where the hot water forward passage 9a is connected with a floor heating panel 8 and the hot water forward passage 9b is connected with fan convectors 7a to 7c. A hot water return passage 10 to the hot water boiler 2 is constructed on a common return passage where the fan convectors and circuits from the floor heating panels are joined.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a hot water heating system in which hot water is generated by a hot water boiler and the hot water is circulated through a plurality of radiators such as a fan convector and a floor heating panel.

[0002]

2. Description of the Related Art As shown in FIG. 10, for example, hot water is generated by a hot water boiler 103 which heats water or antifreeze through a heat exchanger 102 by a combustion device 101 (for example, a burner), and the hot water is passed through a hot water circulation path. There is known a hot water heating system in which heating is performed by circulating heat to a plurality of radiators 105 connected in parallel to the heat radiator 104.

[0003] The plurality of radiators 105 include, for example, fan convectors 105b, 105c, and 105d and a floor heating panel 105a. Since the amount of heat radiation of the floor heating panel 105a is smaller than that of the fan convector, the floor heating circuit is provided with, for example, a valve 106 as shown in FIG. 10, thereby controlling the amount of heat radiation by reducing the amount of water. ing. The capacity of the fan convector is varied, for example, by controlling the rotation speed of a convection blower.

[0004]

In the conventional hot water heating system as described above, the fan convector 105
The temperature of the hot water generated by the hot water boiler 103 is increased to a relatively high temperature (for example, about 80 ° C.) in accordance with these fan convectors in order to secure the required heat radiation amount in b, 105c, and 105d.

[0005] However, the relatively high-temperature hot water is also circulated to the floor heating panel 105a having a lower temperature requirement (for example, 60 ° C) for the hot water.
05a surface temperature becomes too high or floor heating panel 1
There is a possibility that the temperature of the hot water pipe to 05a becomes too high.

An object of the present invention is to prevent such a problem from occurring even if a plurality of radiators having different temperature requirements for hot water are connected to one hot water boiler. The purpose of the present invention is to make it possible to circulate hot water at an optimum temperature according to the temperature required characteristics.

[0007]

Means for Solving the Problems In order to solve the above problems, a hot water heating system of the present invention differs from a hot water boiler for generating hot water in temperature demand characteristics for hot water circulated from the hot water boiler. A hot water heating system having a plurality of radiators connected to the hot water boiler, wherein a hot water circulation path to each of the radiators connected to the hot water boiler is provided in accordance with a temperature required characteristic of each of the radiators. A plurality of hot water circuits having different temperatures of hot water supplied to the radiator are provided.

[0008] More specifically, the hot water heating system according to the present invention can take the following aspects.

First, the hot water forward path of the hot water circulation path is branched into at least two forward paths, and, among the branched forward paths, the forward path connected to a radiator having a lower temperature requirement is formed by a bypass circuit. It is possible to adopt a configuration that communicates with the hot water return path of the hot water circulation path through the hot water circulation path.

It is preferable that the bypass circuit is provided with a control valve for controlling the amount of water flowing in the bypass circuit.

In the hot water heating system according to the present invention, the hot water forward path and the hot water return path of the hot water circulation path are branched into at least two circuit forward paths and return paths connected to radiators having different temperature requirements. Among the branched hot water circuits, the forward path and the return path of the hot water circuit connected to the radiator having the lower temperature required characteristic are the hot water passed through the forward path and the hot water passed through the return path. Can be adopted such that heat exchange is performed between them.

The branch to the at least two circuits may be provided in a branch unit and performed in the branch unit.

[0013] The connection between the forward path and the return path of the branched hot water circuit is performed, for example, as follows. That is,
The coupling of the forward path and the return path of the branched hot water circuit partially wraps the forward path pipe and the return path pipe with a high thermal conductive plate,
In addition, the structure performed by brazing and joining the two or the outgoing path and the returning path of the branched hot water circuit are partially formed of pipes with internal fins, and the pipe sections are connected by brazing. It is possible to adopt the structure which has been done.

Further, in the hot water heating system according to the present invention, the hot water circulation path includes a first hot water circuit including a hot water forward path and a hot water return path connected to a radiator having a higher temperature requirement. A hot water forward path branched from the return path of the first hot water circuit and connected to a radiator having a lower temperature requirement, and a hot water return path connected to the radiator and joining the return path of the first hot water circuit. And a second hot water circuit.

Further, in the hot water heating system according to the present invention, the hot water circulation path is different from each other in the amount of heat exchange in the one hot water boiler and can generate a plurality of independent hot water at different temperatures. It is also possible to adopt a configuration in which each of the hot water circuits is connected to a radiator having a different required temperature characteristic.

[0016] The hot water heating system according to the present invention comprises:
The plurality of radiators include a radiator that requires higher-temperature hot water, for example, a fan convector, and a radiator that requires lower-temperature hot water, for example, a floor heating panel.

In such a hot water heating system according to the present invention, hot water having different temperatures is supplied and circulated to a plurality of hot water circuits, respectively, so that a fan convector or the like that requires higher hot water is required. The hot water boiler can supply hot water at an optimum temperature to a radiator and a radiator such as a floor heating panel that requires lower temperature hot water. Therefore, even in a hot water heating system having only one hot water boiler, there is no problem that the surface temperature of the floor heating panel or the piping to the floor heating panel becomes too high, and each radiator has In each case, comfortable heating can be performed.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a hot water heating system 1 according to a first embodiment of the present invention. In FIG. 1, reference numeral 2 denotes a hot water boiler that generates hot water. The hot water boiler 2 includes a burner 3 as a combustion device,
A heat exchanger 4 for heating water (hot water) flowing through the interior by heat exchange. The generated hot water is circulated in the hot water circulation path 6 by the circulation pump 5.

In the present embodiment, a plurality of radiators 7a, 7b, 7c such as a fan convector are provided in the hot water circulation path 6,
A radiator 8 composed of a floor heating panel or the like is provided.
The fan control vectors 7a, 7b, 7c and the floor heating panel 8 require hot water of different temperatures. For example, fan convectors 7a, 7b, 7c have higher temperature requirements, require that hot water be supplied, floor heating panel 8 has lower temperature requirements,
Requires that colder hot water be supplied.

In accordance with the different temperature requirements of such a radiator, the hot water circulation path 6 has two forward water paths 9a,
9b, the hot water forward path 9a is connected to the floor heating panel 8, and the hot water forward path 9b is connected to the fan control vectors 7a, 7b,
7c. Hot water return route 1 to hot water boiler 2
0 is configured as one common return path where the circuits from the fan convectors 7a, 7b, 7c and the floor heating panel 8 join.

Among the branched hot water outgoing paths 9a and 9b, the hot water outgoing path 9a connected to the floor heating panel 8 having a lower temperature characteristic and the hot water returning path 10 are:
The communication is made via a bypass circuit 11. The bypass circuit 11 is provided with a control valve 12 capable of controlling the amount of water passing through the bypass circuit 11.

The hot water heating system 1 configured as described above
In the hot water return path 9, a part of the low-temperature hot water used for heat radiation, which has been bunched in the hot water return path 10, supplies the hot water to the floor heating panel 8 via the bypass circuit 11.
The hot water is merged (mixed) with the supplied hot water in (a), and the merged hot water is supplied to the floor heating panel 8. The hot water before merging is high-temperature hot water from the hot-water boiler 2, but when low-temperature hot water from the hot-water return path 10 is merged, hot water lower in temperature than the hot water from the hot-water boiler 2 is generated. It is supplied to the floor heating panel 8. For example, if the temperature of the hot water generated by the hot water boiler 2 is about 80 ° C., the floor heating panel 8
The temperature of the hot water supplied to is reduced to, for example, about 60 ° C. As a result, the hot water having an excessively high temperature is not supplied to the floor heating panel 8, and the occurrence of troubles due to this is eliminated.

On the other hand, fan control vectors 7a, 7b, 7c
, Hot water from the hot water boiler 2 is supplied as it is, and desired heat radiation performance is exhibited.

As described above, the radiators (the fan convectors 7a, 7b, 7c and the floor heating panel 8) having different required temperature characteristics are supplied with hot water having the optimum temperature according to the required characteristics. In each of the radiators, the desired good heat radiation performance is exhibited.

Further, if the throttle amount of the control valve 12 is adjusted in accordance with the temperature of the hot water required for the floor heating panel 8 and the like, it is possible to more accurately control the temperature of the supplied hot water.

In the embodiment shown in FIG. 1, the case where the radiator requesting lower temperature hot water is one floor heating panel 8 is shown, but a plurality of radiators or a plurality of stages of hot water temperature are required. The present invention can be applied to such cases.

For example, as shown in FIG. 2 as a modification of the first embodiment, as shown in FIG.
(Two in the illustrated example) are branched, and each hot water forward path 9a, 9
A configuration may be adopted in which bypass circuits 11a and 11b having control valves 12a and 12b are connected from the hot water return path 10 to c.

In such a configuration, each radiator 8
If the control valves 12a and 12b are independently adjusted, hot water having different temperatures according to the radiators 8a and 8b can be supplied. it can. Radiator 8a,
Even when there are three or more 8b, a similar configuration may be simply added.

FIG. 3 shows a hot water heating system 21 according to a second embodiment of the present invention. 3, reference numeral 22 denotes a hot water boiler, 23 denotes a burner, 24 denotes a heat exchanger, 25 denotes a circulation pump, and 26 denotes a hot water circulation path.

In this embodiment, the hot water circulation path 26
Has a fan convector 27 that requires hotter water.
And a floor heating panel 28 that requires lower-temperature hot water. The forward path from the hot water boiler 22 and the return path to the hot water boiler 22 in the hot water circulation path 26 are branched into two forward paths 29a and 30a and two return paths 29b and 30b. The branch is a branch unit 3 in this embodiment.
1, the branched outgoing path 29a and the returning path 29b are connected to the floor heating panel 28, and the outgoing path 30a and the returning path 30b
Are connected to the fan control vector 27. A control valve 32 capable of adjusting the amount of water flow is provided in the branched forward path 29a.

Of the branched hot water circuits, the outgoing path 29a and the return path 29b of the hot water circuit connected to the floor heating panel 28 having the lower temperature characteristic are formed by the hot water flowing through the outward path 29a and the hot water. The joints 33 (connecting parts) are connected to each other so that heat exchange is performed between the returning water 29b and the warm water flowing through the returning path 29b.

The connection between the forward path 29a and the return path 29b is as follows.
For example, this is performed as shown in FIGS. In the structure shown in FIG. 4, the pipe 34a for the forward path 29a and the pipe 34b for the return path 29b are partially wrapped by the high heat conductive plate 35, and both are brazed. Piping 34a, 34
b is made of, for example, a copper pipe, and the high thermal conductive plate 35 is
For example, it is made of a copper plate.

In the structure shown in FIG. 5, a pipe 36a for the forward path 29a and a pipe 36b for the return path 29b are partially formed in the pipe sections 37a, 37b with inner fins, respectively.
The pipe portions 37a and 37b with the inner fins are brazed to each other by a brazing portion 38.

The hot water heating system 2 configured as described above
In FIG. 1, the floor heating panel 28 that requires lower-temperature hot water is supplied with low-temperature hot water, and the fan convector 27 that requests higher-temperature hot water receives high-temperature hot water from the hot water boiler 22. Supplied as is. The decrease in the temperature of the hot water supplied to the floor heating panel 28
Done in

The operation of lowering the temperature of the hot water will be described with reference to FIGS. In FIG. 3, the position upstream of the connecting portion 33 of the branch forward path 29a is P ₁ , the position downstream thereof is P ₂ , the position upstream of the connecting portion 33 of the branch return path 29b is Q ₁ , and the position downstream thereof is Q _2. Then, the temperature of the hot water at each position exhibits a behavior as shown in FIG.

[0036] For example, the supply hot water 80 ° C. at P ₁ position of the hot water boiler 22, the bowling hot water from the floor heating panel 28 is assumed to be 40 ° C. by Q ₁ position, both hot water together in the section of the coupling portion 33 , The temperature of the hot water in the forward path 29a is reduced from 80 ° C. to about 60 ° C. On the contrary, the temperature of the hot water in the return path 29b is reduced from 40 ° C. to 60 ° C.
Enhanced to a degree. The low-temperature hot water (for example, hot water of 60 ° C.) is supplied to the floor heating panel 28.

Therefore, also in this embodiment, hot water having a reduced temperature and an optimum temperature is supplied in accordance with the required temperature characteristics of the floor heating panel 28.

In this embodiment, as in the first embodiment, a plurality of branch circuits as shown in FIG. 3 can be provided.

FIG. 7 shows a hot water heating system 41 according to a third embodiment of the present invention. 7, reference numeral 42 denotes a hot water boiler, 43 denotes a burner, 44 denotes a heat exchanger, 45 denotes a circulation pump, and 46 denotes a hot water circulation path.

In this embodiment, the hot water circulation path 46
Has a fan convector 47 that requires hotter water.
And a floor heating panel 48 for requesting lower-temperature hot water. The hot water circulation path 46 includes a hot water forward path 49 a and a hot water return path 49 connected to the fan control vector 47.
b, the first hot water circuit 49 and the first hot water circuit 4
9, a hot water return path 50a branched from the return heating panel 48 and connected to the floor heating panel 48, and a hot water return path 50b connected to the floor heating panel 48 and connected to the return path 49b of the first hot water circuit 49. Second hot water circuit 5 comprising
0 is provided. A control valve 51 capable of controlling the flow rate of hot water diverted to the outward path 50a is provided at a branch point from the return path 49b to the outward path 50a.

The hot water heating system 4 configured as described above
In 1, since relatively low-temperature hot water used for heat radiation in the fan convector 47 is supplied to the floor heating panel 48 via the hot water outward path 50 a, hot water having an excessively high temperature is supplied to the floor heating panel 48. There is no danger. Therefore, hot water having a preferable temperature is circulated to each of the fan convector 47 and the floor heating panel 48, and a desirable and comfortable heating state is obtained in each radiator.

Since the branch flow of the return path from the fan convector 47 is sent to the floor heating panel 48, it is not necessary to reduce the flow rate to the fan convector 4 at all, and the fan convector 47 requiring a higher heat radiation amount is not required. Is supplied with a sufficient amount of warm water, and a desired heat radiation amount of the fan convector 47 is secured.

FIG. 8 shows a hot water heating system 61 according to a fourth embodiment of the present invention. In FIG. 8, 62
Denotes a hot water boiler, and 63 denotes a burner. In the hot water boiler 62, two heat exchangers 64a and 64b are provided, and independent hot water circuits 65a and 65b are connected to the heat exchangers 64a and 64b. In each of the hot water circuits 65a and 65b, a hot water circulating pump 6 is provided.
6a and 66b are provided.

The heat exchangers 64a and 64b can generate hot water having different temperatures. The heat exchanger 64a generates lower-temperature hot water, and the heat exchanger 64b generates higher-temperature hot water. You. Hot water circuit 65a
Are connected to a floor heating panel 67 having lower temperature required characteristics, and the hot water circuit 65b is connected to a fan convector 68 having higher temperature required characteristics.

The hot water heating system 6 configured as described above
In 1, since one hot water boiler 62 is provided with independent hot water circuits 65 a and 65 b that circulate hot water having different heat exchange amounts in the hot water boiler 62 and different temperatures from each other, each hot water circuit 65 a , 65b can be independently connected to radiators having different hot water temperature requirements, that is, the floor heating panel 67 and the fan convector 68.
Therefore, the floor heating panel 67 and the fan control vector 68
In this case, hot water having a desired temperature is passed. In particular, by setting the temperature of the hot water to the floor heating panel 67 to be low, the problem of supplying the hot water having an excessively high temperature to the floor heating panel 67 can be easily solved.

In the embodiment shown in FIG. 8, the hot water boiler 6
Although the heat exchangers 64a and 64b having different heat exchange amounts are provided side by side in 2, the structure of this portion may be configured as shown in FIG. 9, for example.

In the embodiment shown in FIG.
The hot water in the can body 73 is heated by the burner 72 provided therein, and the heated hot water heats the hot water circulated in the heat exchanger 74 via the heat exchanger 74. I have. Therefore, hot water having a higher temperature is circulated in the hot water circuit 75 which is communicated into the can body 73, and the heat exchanger 74
In the hot water circuit 76 communicated with the hot water, hot water of lower temperature is circulated. This hot water circuit 75 is replaced with a hot water circuit 76 having a higher temperature requirement characteristic.
May be connected to a floor heating panel or the like having lower temperature required characteristics. Other functions and effects are similar to those of the embodiment shown in FIG.

[0048]

As described above, according to the hot water heating system of the present invention, hot water at an optimum temperature is supplied to a plurality of radiators having different hot water temperature required characteristics while being a single hot water boiler. It is possible to obtain a desired amount of heat radiation in each radiator and obtain a comfortable heating state.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water heating system according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a hot water heating system according to a modification of FIG.

FIG. 3 is a schematic configuration diagram of a hot water heating system according to a second embodiment of the present invention.

FIG. 4 is a partially enlarged schematic configuration diagram of the system of FIG. 3;

FIG. 5 is a cross-sectional view of a coupling portion according to a modification of FIG.

FIG. 6 is a diagram showing a temperature characteristic of hot water around a joint in the system of FIG. 3;

FIG. 7 is a schematic configuration diagram of a hot water heating system according to a third embodiment of the present invention.

FIG. 8 is a schematic configuration diagram of a hot water heating system according to a fourth embodiment of the present invention.

FIG. 9 is a schematic configuration diagram of a hot water boiler section according to a modification of FIG.

FIG. 10 is a schematic configuration diagram of a conventional hot water heating system.

[Explanation of symbols]

1, 21, 41, 61 Hot water heating system 2, 22, 42, 62, 71 Hot water boiler 3, 23, 43, 63, 73 Burner 4, 24, 44, 64a, 64b, 74 Heat exchanger 5, 25, 45 , 66a, 66b Circulation pump 6, 26, 46 Hot water circulation path 7a, 7b, 7c, 27, 47, 68 Fan con vector 8, 8a, 8b, 28, 48, 67 Floor heating panel 9a, 9c Outbound path for hot water lower than 9a, 9c 9b Outgoing path for hot water higher than 10 Hot water return path 11, 11a, 11b Bypass circuit 12, 12a, 12b, 32 Control valve 29a Hot water return path to floor heating panel 29b Hot water return path from floor heating panel 30a Hot water forward path to fan convector 30b Hot water return path from fan convector 31 Branch unit 33 Coupling section 34a, 36a Outgoing pipe 34b, 36 b Return path piping 35 High heat conductive plates 37a, 37b Internal finned piping section 38 Brazing section 49 First hot water circuit 49a Hot water forward path of first hot water circuit 49b Hot water return path of first hot water circuit 50 Second hot water circuit 50a Hot water forward path of the second hot water circuit 50b Hot water return path of the second hot water circuit 65a, 65b Independent hot water circuit 73 Can body 75 Hot water circuit connected to the inside of the can body 76 Hot water circuit connected to the heat exchanger 76

Claims (10)

[Claims] 1. A hot water heating system comprising: a hot water boiler for generating hot water; and a radiator connected to a plurality of hot water boilers having different temperature requirements for hot water circulated from the hot water boiler, The hot water circulation path to each radiator connected to the hot water boiler is provided with a plurality of hot water circuits in which the temperature of the hot water supplied to each radiator is different from each other according to the temperature required characteristics of each radiator. A hot water heating system characterized by the following. 2. The hot water circulation path of the hot water circulation path is branched into at least two outward paths, and, among the branched outward paths, the outward path connected to a radiator having a lower temperature requirement characteristic includes a bypass circuit. The hot water heating system according to claim 1, wherein the hot water heating system is connected to the hot water return path of the hot water circulation path via the hot water circulation path. 3. A control valve for controlling a flow rate of water in the bypass circuit is provided in the bypass circuit.
The hot water heating system according to claim 2. 4. The hot water circulation path and the hot water return path of the hot water circulation path are branched into at least two outgoing paths and return paths connected to radiators having different temperature requirement characteristics, and the lower temperature of the branched hot water circuit is selected. In the forward path and the return path of the hot water circuit connected to the radiator having the temperature required characteristic, the heat exchange is performed between the hot water passed through the forward path and the hot water passed through the return path. The hot water heating system of claim 1, wherein the system is coupled to each other. 5. The hot water heating system according to claim 4, wherein the branch to the at least two circuits is performed in a branch unit. 6. The connection between the forward path and the return path of the branched hot water circuit is performed by partially wrapping the forward path pipe and the return path pipe with a high thermal conductive plate and brazing the two together. The hot water heating system according to claim 4 or 5, wherein 7. The outgoing path and the return path of the branched hot water circuit are partially formed of pipes with internal fins, and the pipe sections are brazed and connected.
Hot water heating system. 8. A first hot water circuit comprising a hot water forward path and a hot water return path connected to a radiator having a higher temperature requirement, and a branch from the return path of the first hot water circuit. And a second hot water circuit comprising a hot water return path connected to the radiator and connected to the return path of the first hot water circuit and connected to the radiator having a lower temperature requirement. The hot water heating system of claim 1, wherein: 9. The hot water circulation path is composed of a plurality of independent hot water circuits that differ in the amount of heat exchange in the one hot water boiler and can generate hot water of different temperatures. The hot water heating system according to claim 1, wherein the hot water heating system is connected to radiators having different temperature requirements. 10. The hot water heating system according to claim 1, wherein the plurality of radiators include a fan convector that requests hotter hot water and a floor heating panel that requests lower hot water. .