JP3121393U - Water supply device for regenerative electric boiler - Google Patents

Abstract

A water supply apparatus for a regenerative electric boiler that uses midnight electricity to prevent heat loss from a hot water supply pipe 21 and facilitate a common heat insulation work between the hot water supply pipe 21 and the return pipe 23. To plan.
A hot water supply pipe 21 for supplying hot water from an electric boiler 9 is led to the lower part of a water tank 20, and is then taken out from there and then connected to a heating pipe 23 to reduce heat loss. Then, since the hot water supply pipe 21 and the return pipe 25 are connected at the lower part of the electric boiler 9, both the heat insulation work can be performed and the heat insulation work can be facilitated.
[Selection] Figure 1

Description

  The present invention relates to a water supply device for a boiler for using heating or hot water using midnight electricity supplied at a low cost.

Late night electric boilers that use cheap electricity are used at midnight, and not only fuel costs are reduced by about 50% compared to boilers that use fuel oil and city gas, but late-night electricity charges are about one-fourth of general electricity charges. Its use is increasing due to its benefits that are only standard. For this purpose, it is desirable to minimize heat loss because the boiler used for this purpose has an effective heat exchange property. For example, Patent Document 1 can be shown as a heat storage and heating system.
JP-A-10-288398

  A conventional electric boiler water supply apparatus is shown in FIG. 4, and the structure of the electric boiler 9 includes a water tank 20 that can mainly store a certain amount of water, and at the same time, the water stored inside An electric heater 10 for heating is provided, and on one side thereof, a hot water supply pipe 21 that supplies hot water heated in the water tank 20 to the heating pipe 23 and heating water heat-exchanged from the heating pipe 23 are supplied to the water tank 20. A return pipe 25 is provided.

  Such a heat storage type electric boiler heats water at midnight and stores heat, so the water tank 20 must be as large as possible. Due to the increase in the size of the water tank, the hot water supply pipe 21 is attached to the upper part of the boiler, and the return pipe 25 is attached to the lower part of the boiler. In addition, there is a drawback that a large installation space is required for the heat insulating material.

  In addition, when the installation area of an electric boiler that uses midnight electricity is mainly in a rural area, the installation place is narrow and easily surrounded by a plate outside the house, and the hot water supply pipe is connected to the upper part of the electric boiler as described above. However, there is a problem that the exposed portion is large and heat loss due to the outside air is large. In addition, after installing the electric boiler, it is difficult to heat-insulate the hot water supply pipe at the high position, and the return pipe is also heat-insulated separately, so it is difficult to install if the place where the boiler is installed is small. It was.

  Therefore, the present invention has been devised to improve the above-described problems, and aims to improve heat insulation work between the hot water supply pipe and the return pipe while minimizing heat loss. .

  A water supply device for a regenerative electric boiler according to the present invention includes an electric boiler 9 that heats water by placing an electric heater 10 in a water tank 20 insulated by a heat insulating material 11, and a hot water supply pipe 21 from the electric boiler 9. The hot water supply pipe 21 includes a heating pipe 23, and a water supply device for a regenerative electric boiler provided with a heating pipe 23, and warm water from the heating pipe 23 and a return pipe 25 that returns to the electric boiler 9. The one end enters from the lower part of the water tank 20 and extends upward in the water tank 20, and has a suction hole 30 at the tip, and the return pipe 25 has one end at the lower part of the water tank 20. And having an injection hole at the tip (claim 1).

  From this configuration, the heated water in the upper layer (warm water) is sucked into the warm water supply pipe from the tip, and guided to the lower part through the warm water supply pipe in the water tank, and then goes out of the water tank. Heat loss due to outside air can be suppressed as compared with the conventional example passing outside the water tank.

  It is preferable that the suction hole of the hot water supply pipe is constituted by a plurality of small holes (Claim 2). Hot water can be sucked from a wider range than many small holes, and a temperature drop due to rapid discharge of hot water can be prevented. In addition, the injection hole of the return pipe is preferably composed of a large number of small holes (Claim 3), and since warm water cooled from the small holes is injected in a small amount, the temperature is quickly exchanged with the hot water in the water tank ( It is possible to increase the heat storage effect by preventing rapid heat exchange.

  According to the invention of claim 1, the heated hot water moves from the upper part of the water tank to the lower part, and then goes out and is connected to the heating pipe. There is no heat loss. That is, since the hot water supply pipe exposed to the outside is minimized, heat loss can be reduced. Further, the return pipe and the hot water supply pipe are close to each other, and both can be insulated and the heat insulation work becomes easy.

  According to the second aspect of the present invention, since the suction hole is composed of a plurality of small holes, the suction hole can be sucked from a wide range, so that a decrease in temperature due to discharge of hot water can be prevented. Furthermore, according to the invention of claim 3, since warm water having a low temperature flows into the water tank little by little from the small hole of the return hole of the return pipe, heat exchange with the warm water is accelerated, and a rapid temperature change accompanying the heat exchange occurs. Can be prevented. Furthermore, according to the invention of claim 4, since both the hot water supply pipe and the return pipe are covered with the heat insulating material, the heat insulating work can be facilitated and simplified.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1 thru | or FIG. 3, the electric boiler 9 is enclosed with the heat insulating material 11, and the water tank 20 is distribute | arranged inside. The replenishment water pipe 12 and the safety valve 13 are connected to the top of the water tank 20, and the electric heater 10 is disposed relatively downward in the interior thereof.

  Further, one end of the hot water supply pipe 21 enters the water tank 20 from the bottom, and then extends upward along the water tank 20, and a suction hole 30 including a plurality of small holes is provided at the tip. Furthermore, the other end goes out of the water tank and is connected to the forward side of each heating pipe 23 via the distributor 22. The return side of the heating pipe 23 is connected to the return pipe 25 via the collector 24. A pump 26 is provided in the return pipe 25.

  The return pipe 25 enters the water tank 20 from the lower part, and an injection hole 31 is formed at the tip thereof. The injection hole 31 is composed of a large number of small holes, and the returned warm water is injected from the small holes in a small amount. This prevents a decrease in thermal efficiency due to sudden heat exchange accompanying heat exchange. Then, since the hot water supply pipe 21 and the return pipe 25 are both in the lower part and are close to each other, it is easy to perform heat insulation work and can be installed in a small area.

Action

  The electric boiler 9 heats the water in the water tank 20 by the heater 10 by midnight electricity. When heating is performed using the electric boiler 9, the water in the heating pipe 23 is sent into the water tank 20 when the pump 29 is moved when the power is turned on, while the heated hot water in the water tank 20 is supplied to the hot water supply pipe 21. It is sucked from the suction hole 30.

  The sucked warm water descends the warm water supply pipe 21 in the water tank 20, minimizes heat loss of the warm water, and flows to the heating pipe 23 via the distributor 22. The hot water after heat exchange for heating is returned to the water tank 20 from the return pipe 25 via the collector 24.

  As described above, introducing hot water heated from the suction hole 30 formed in the hot water supply pipe 21 little by little prevents the problem that the hot water is cooled by a sudden outflow and prevents the hot water in the water tank 20 from being cooled. Temperature can be maintained. Moreover, the return pipe 25 which enters from the lower part of the water tank 20 injects hot water little by little from the many injection holes 31, accelerates heat exchange, prevents sudden heat exchange loss due to heat exchange, and has a heat exchange effect. Can be increased. This is because hot water is easily mixed by a downward jetting and a small amount of jetting, and heat is exchanged while rising by a slowly circulating convection phenomenon.

1 is an overall schematic explanatory view showing an embodiment of the present invention. It is an expanded sectional view of the suction hole part of the front-end | tip part of a warm water supply pipe same as the above. It is an enlarged view of A part shown in FIG. It is a schematic explanatory drawing of the water supply apparatus using the conventional electric boiler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 Electric boiler 10 Electric heater 11 Heat insulating material 20 Water tank 21 Hot water supply pipe 23 Heating piping 25 Return pipe 30 Suction hole 31 Injection hole

Claims (4)

An electric boiler 9 that heats water by placing an electric heater 10 in a water tank 20 insulated by a heat insulating material 11, a heating pipe 23 to which hot water is supplied from the electric boiler 9 via a hot water supply pipe 21, In a water supply device for a regenerative electric boiler, comprising a return pipe 25 for returning hot water from the heating pipe 23 to the electric boiler 9,
One end of the hot water supply pipe 21 enters from the lower part of the water tank 20 and extends upward in the water tank 20, and has a suction hole 30 at the tip part.
One end of the return pipe 25 enters from the lower part of the water tank 20 and has an injection hole 31 at the tip, and a water supply device for a regenerative electric boiler.   The water supply device for a regenerative electric boiler according to claim 1, wherein the suction hole (30) of the hot water supply pipe (21) comprises a plurality of small holes.   The water supply device for a regenerative electric boiler according to claim 1, wherein the injection hole (31) of the return pipe (25) comprises a plurality of small holes.   The water supply device for a regenerative electric boiler according to claim 1, wherein the warm water supply pipe and the return pipe are both covered with a heat insulating material.

Images