JPH02267427A - Method and device for raising hot water supply temperature in domestic hot water supply system - Google Patents

Abstract

PURPOSE:To eliminate the need for a circulation pump and prevent cold dead water from being produced in the hot water riser pipes by heating with a heater the hot water in the lower half of one of the two vertical lines including hot water riser pipe in the heating and circulating line so as to heat the hot water in the hot water riser pipe by convection. CONSTITUTION:The rooftop hot water reservoir 5 having a boiler 4 and a header 6 is installed on the rooftop of a multi-unit residential building. Hot water riser pipes 7 are extended from the header 6, and lateral hot water distribution pipes 8 are extended from the hot water riser pipes 7 for each floor. The heating and circulating line 11 comprises a hot water riser 7 and a small diameter bypass pipe 12 which are connected in a closed loop. The hot water riser pipe 7 has an intermediate floor band heater 13 in its middle and another band heater 14 in the lower end. The hot water riser pipe 7 and the bypass pipe 12 are covered with an insulating material 16 and a cover material 17. When the temperature of hot water in the hot water riser pipe 7 drops, a temperature sensor detects the drop and causes a voltage to be applied to the band heaters 13, 14. Then, a convection is generated in the heating and circulating line 11, and the hot water in the riser pipe 7 is heated up to and maintain a constant temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for increasing the temperature of hot water in a hot water supply residential piping facility, which is used as a countermeasure against heat loss from hot water supply piping.

[Prior Art] One of the issues with central hot water supply equipment for each residential building is how to counter heat loss from the residential building piping9. It can be said that the heat loss from the piping increases as the temperature of the hot water passing through the piping increases and the total length of the piping increases.

In the case of residential piping equipment for hot water supply, non-circulating types tend to create dead water in the pipes, and circulating types have the problem of greater heat loss from the piping than non-circulating types. Circulation type equipment is preferable, and therefore measures against heat loss are essential.

A hot water heating device has been proposed as a measure against heat loss, and its configuration consists of a heating heater spirally wrapped around each hot water vertical pipe extending from the header connected to the boiler in a spiral shape in the piping equipment of a hot water supply residential building. It is something that

When the temperature of the hot water in the hot water supply pipe drops, a heating heater is used to heat the hot water throughout the longitudinal direction of the hot water supply pipe, thereby maintaining the hot water at a constant temperature.

[Problem to be solved by the invention] However, in the conventional hot water heating method and device described above, the non-circulating type still tends to produce dead water, and as a result, a temperature difference occurs between the top and bottom of the vertical hot water pipe. It ends up. In order to cope with this problem, a circulation system must be used, which poses problems in that the equipment and operation costs for the circulation pump are high and noise is generated. Moreover, a large-capacity temperature-raising heater must be installed in the hot water supply vertical pipe, and there is no equipment cost for the temperature-raising heater. I! The problem was that it consumed energy and was expensive. Furthermore, the installation of the circulation pump and the spiral temperature-raising heater increases the size of the equipment, making it difficult to save space on the roof of the housing building.

The present invention has been made in view of the above-mentioned problems, and its purpose is to prevent the occurrence of dead water in vertical hot water pipes,
An object of the present invention is to provide a method and device for heating hot water in hot water supply piping equipment for a residential building, which eliminates the need for a circulation pump, reduces noise, downsizes the equipment, and saves space in the residential building ring.

[Means for Solving the Problems] The hot water temperature raising method of the hot water supply housing piping equipment of the present invention that achieves the above-mentioned object is a measure against heat loss from a hot water supply vertical pipe extending from a header connected to a boiler or an electric water heater. In a method for raising the temperature of hot water in a hot water supply building piping equipment, which raises the temperature of hot water in a vertical hot water pipe, the heating of hot water in the lower half of one of the two vertical passages of the temperature increasing circulation path including the vertical hot water pipe. 71i in the hot water supply vertical pipe by heating with a hot water heater and circulating the heat from the hot water heating heater through the temperature raising circulation path by convection! It is characterized by raising the temperature of hot water.

Further, the hot water heating device for hot water supply residential piping equipment of the present invention that achieves the above object includes a heating means for compensating for heat loss from a vertical hot water pipe extending from a header connected to a boiler or an electric water heater. In the hot water heating device for the hot water supply housing piping equipment, the heating means forms a heating circulation path including a hot water supply vertical pipe, and one of the two vertical paths of the heating circulation path is connected to the bottom of the heating circulation path. It is characterized by having a temperature increasing heater arranged in the half part.

According to a further preferred embodiment of the present invention, (1) the heating circulation path is formed by a hot water supply vertical pipe and a bypass pipe;
The heating circulation path is characterized by being formed by a hot water supply vertical pipe and another hot water supply vertical pipe.

[Function] When the temperature of the hot water in the hot water supply vertical pipe decreases due to heat loss, this is detected and the hot water in the lower half of one of the two vertical passages of the temperature increasing circulation path is heated by the temperature increasing heater. Convection occurs in the temperature raising circulation path, and heat from the temperature raising heater is circulated and transferred by this convection, so that the hot water in the hot water supply vertical pipe is heated to a constant temperature.

As a result, it is possible to prevent dead water from forming in the hot water supply vertical pipe, eliminate the need for a circulation pump, reduce noise, downsize the equipment, and save space on the roof of the residential building. Therefore, the above-mentioned problem can be eliminated.

[Example] Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 is a configuration diagram showing a hot water heating device for a hot water supply housing piping system according to a first embodiment of the present invention, and FIG. 2 is a diagram showing II of FIG.
-II line sectional view.

Before explaining the hot water heating device, the piping equipment for the hot water supply residence will be explained. A rooftop hot water storage tank 5 equipped with a heater or boiler 4 and a header 6 are provided on the roof of the residence. header 6
A hot water supply vertical pipe 7 extending in a drooping manner is provided, and a hot water supply horizontal branch pipe 8 is provided for each floor on this hot water supply vertical pipe 7. Valve 9 at the upper and lower ends of 7
are arranged respectively.

Such hot water supply residential building piping equipment is equipped with a hot water heating device which is the gist of the present invention. This hot water heating device has a heating circulation path 11 . This temperature increasing circulation path 11 is a closed circuit consisting of a hot water supply vertical pipe 7 and a small diameter bypass pipe 12 disposed along the vertical pipe 7. Further, the hot water supply vertical pipe 7 is provided with an intermediate floor band heater 13 at the center position, or a band heater 14 or a plug heater 5 at the lower end position. As shown in FIG. 2, the hot water supply vertical pipe 7 and the bypass pipe 12 are covered with a heat insulating material I6 such as rock wool.
The heat insulating material 16 is covered with a covering material 17.

Next, a method for raising the temperature of hot water using the hot water heating device having the above configuration will be explained.

When the temperature of the hot water in the vertical hot water pipe 7 drops, this is detected by a temperature sensor (not shown), and based on this detection signal, when a voltage is applied to the hunt heaters 13, 14 or the plug heater 15, the temperature of the hot water in the vertical hot water pipe 7 decreases. The hot water in the half is heated and its temperature increases and its specific gravity decreases. Therefore, convection occurs in the temperature increasing circulation path 11; as a result, the heat from the band heater 14 or the plug heater 15 is circulated and transferred in the temperature increasing circulation path 11 by convection, thereby causing the hot water supply in the hot water supply vertical pipe 7. is kept at a constant temperature.

FIG. 3 relates to a second embodiment of the present invention! t@ is a configuration diagram showing a hot water temperature raising device.

The hot water heating device according to the second embodiment has substantially the same configuration as the first embodiment, but the heating circulation paths 11a, l
lb, llc, lid to hot water supply vertical pipes 7 a, 7 b, 7
c.

It is distinctive in that 7d and 7c are formed together. That is, the first to fifth hot water supply vertical pipes 7a, 7b, 7c, 7d
, 7e, a pant heater 13, 14 or a plug heater 15 is arranged in the lower half of the first to fourth hot water supply vertical pipes 7a, 7b, 7c, and 7d, leaving the J-5th hot water supply vertical pipe 7e. It is set up. As a result, each of the first to fourth hot water supply vertical pipes 7a,
7b.

7c, 7d, the header 6, the collecting pipe 1, and the fifth hot water supply vertical pipe 7e to form first to fourth temperature increasing circulation paths 11a11b,
llc and lld are formed.

Since the operation of the second embodiment is substantially the same as that of the first embodiment, the explanation thereof will be omitted, but the existing first to fifth hot water supply vertical pipes 7 a, 7 b, 7 c, 7 d ,7 out of e.
Band heaters 1: ], 14 and plug heaters 15 are arranged in the lower halves of the first to fourth hot water supply vertical pipes 7a, 7b, 7c, 7d.
b, llc, and lld are formed, the equipment cost can be reduced.

Note that the present invention is not limited to the above embodiments.

For example, in the first and second embodiments.

Although the case has been described in which the hot water supply vertical pipe extends downward from the header, the present invention is not limited to this, and the present invention can also be applied to a case where the hot water supply vertical pipe extends from the header in a sawtooth shape. Further, the heater or boiler 4, hot water tank, and/or header 6 are not limited to the rooftop, but may be located above ground, etc., if the use of a pump is taken into consideration.

[Effects of the Invention] According to the present invention, the hot water is heated by the temperature rising heater in the lower half of one of the two vertical passages of the temperature rising circulation path including the hot water supply vertical pipe, and the heat from the temperature rising heater is heated. The structure is such that the temperature of the hot water in the hot water supply vertical pipe is increased by circulating and transmitting the water through the temperature increasing circulation path, so that the following effects can be obtained.

■Convection in the heating circulation path prevents the generation of cold, dead water, and provides instant hot water at the appropriate temperature.

■Since hot water circulation is not required or temperature can be guaranteed through intermittent circulation, equipment costs and operating costs for circulation pumps can be reduced.

■Noise can be reduced because the circulation pump does not need to be operated.

■There is no need for a circulation pump, and there is also less need for temperature-raising heaters, which leads to smaller equipment and space savings on the roofs of residential buildings, which is also desirable from an aesthetic point of view.

■Convection within the heating circulation path makes it possible to equalize the temperature rise over the entire length of the hot water supply vertical pipe.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing a hot water heating device for a hot water supply housing piping system according to a first embodiment of the present invention, and FIG. 2 is a diagram showing II of FIG.
-II line sectional view and FIG. 3 are configuration diagrams showing a hot water heating device for a hot water heating residential piping facility according to a second embodiment of the present invention. 6: Header 7: Hot water supply vertical pipe 11, temperature increase circulation path 12: bypass pipe 13, intermediate floor band heater 14: band heater 15: plaque heater Representative patent attorney Nobuaki Sakaguchi Diagram

Claims (1)

[Scope of Claims] 1. A hot water heating method for hot water supply housing piping equipment for heating hot water in a hot water supply vertical pipe as a measure against heat loss from a hot water supply vertical pipe extending downward from a header connected to a boiler, The hot water in the lower half of one of the two vertical passages of the heating circulation path including the hot water supply vertical pipe is heated by a heating heater, and the heat from the heating heater is circulated within the heating circulation path by convection. A method for raising the temperature of hot water in a hot water supply residence piping equipment, characterized by increasing the temperature of hot water in a vertical hot water supply pipe by transmitting the water to the hot water supply pipe. 2. In a hot water heating device for hot water supply housing piping equipment, which is equipped with a temperature raising means for compensating for heat loss from a hot water supply vertical pipe extending downward from a header connected to a boiler, the temperature raising means is provided with a hot water supply vertical pipe. A piping system for a hot water supply residence, characterized in that a heating circulation path including pipes is formed, and a heating heater is disposed in the lower half of one of the two vertical passages of the heating circulation path. hot water heating device. 3. The hot water heating device for hot water supply residential building piping equipment according to claim 2, wherein the temperature raising circulation path is formed by a vertical hot water pipe and a bypass pipe. 4. The hot water heating device for hot water supply residential building piping equipment according to claim 2, wherein the temperature raising circulation path is formed by a hot water supply vertical pipe and another hot water supply vertical pipe.