JP6616926B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type water heater.

  Conventionally, in this type of hot water storage type hot water heater, the hot water in the hot water storage tank is heated to a high temperature by the heating means, and the hot water discharged from the hot water storage tank through the hot water discharge pipe and the water supplied through the hot water supply pipe are used. Was mixed with a hot water supply mixing valve to supply hot water. Therefore, in order to prevent heat dissipation from the hot water storage tank and the hot water discharge pipe, the hot water storage tank and the hot water discharge pipe are covered with a heat insulating material having a heat insulating effect.

  For example, FIG. 4 shows an upper part of a hot water storage tank and a hot water discharge pipe, and the hot water storage type hot water heater includes a hot water storage tank 101 for storing hot water, and a hot water discharge pipe 102 composed of an L-shaped copper pipe. And an upper heat insulating material 103 that covers the upper portion of the hot water storage tank so as not to dissipate the heat in the hot water storage tank 101 to the outside, and a pipe heat insulating material 104 wound around the hot water discharge pipe 102 on the downstream side. By storing inside 103, heat dissipation from the piping was prevented. Further, when the pipe heat insulating material 104 is wound, the pipe diameter is increased by the amount of the pipe heat insulating material 104, and therefore the thickness of the heat insulating material 103 is changed in the portion where the pipe heat insulating material 104 is wound.

  Conventionally, in this type of hot water storage type hot water heater, the hot water flowing through the tapping pipe is hot water, and it is necessary to consider the corrosion of the pipes. Corrosion prevention was performed (Patent Document 1).

JP 2010-210157 A

  However, since the stainless steel pipe has higher strength than the copper pipe, it is necessary to take a large amount of grip when bending, and as a result, the distance from the bending center of the pipe to the hot water storage tank becomes long. As a result, in order to maintain the height of the conventional housing, the heat insulation capacity is reduced, but the upper heat insulation material is uniformly shaved by the extension of the distance or the back of the conventional housing is removed. There was a problem that it was necessary to secure a space for extension as it became higher.

Since the present invention is to solve the above problems, a hot water storage tank for hot water storage hot water, a heating means for heating the hot water of the hot water storage tank, a water supply pipe for supplying water to the hot water storage tank, the hot water of the hot water storage tank A hot water discharge pipe formed of stainless steel for hot water coming out from the top of the hot water storage tank, a water supply bypass pipe branched from the water supply pipe, a hot water supply mixing valve for mixing hot water from the hot water supply pipe and water from the water supply bypass pipe And an upper heat insulating material that covers at least a part of the hot water storage tank and at least a part of the hot water discharge pipe to prevent heat dissipation, and the hot water discharge pipe has an upstream hot water discharge pipe extending vertically upward from the hot water storage tank and is bent. And a downstream hot-water pipe connected from the bent part to the hot-water supply mixing valve, the hot-water pipe having the upstream hot-water pipe, the bent portion, and the downstream hot-water pipe integrally formed. Hot water storage water heater Oite said to have a substantially horizontal portion on the lower surface of the upper heat insulating material, wherein the tapping tube, along with longer than gripping allowance to a predetermined length required when bending at least the tapping tube, the substantially horizontal wherein an upstream hot water pipe connected to said hot water storage tank below the parts, the bending portion and a said downstream tapping tube Ru extending inclined downward from the horizontal direction by, the downstream tapping pipe , comprising a pipe insulation material to prevent heat dissipation of the downstream tapping pipe, the downstream tapping tube, the thickness of the pipe insulation material between the substantially between the substantially horizontal portion than the horizontal section and the downstream tapping pipe The pipe heat insulating material was wound from the predetermined value lower side to the downstream side where the above gap was formed .

  Thus, according to the first aspect of the present invention, the hot water discharge pipe is made of a stainless steel material, so that corrosion of the pipe due to hot water is prevented and the length of the upstream hot water discharge pipe is longer than a predetermined length. Taking the bend angle of the hot water discharge pipe at the top of the hot water storage tank, tilting the downstream hot water discharge pipe downward from the horizontal, and making the lower surface of the upper heat insulating material a horizontal part, the heat insulating effect is maintained and the heat insulating effect is maintained. It is possible to store a downstream side hot water pipe with a pipe heat insulating material wound inside.

Schematic explanatory diagram of an embodiment of the present invention Sectional drawing of the hot water storage tank vicinity of the Example of this invention Sectional drawing of the principal part of the Example of this invention Conventional cross-sectional view

A first embodiment of a water heater according to the present invention will be described with reference to FIGS.
1 is a hot water storage tank for storing hot water, 2 is a water supply pipe connected to the lower part of the hot water storage tank 1, 3 is a hot water supply pipe made of stainless steel connected vertically upward from the upper part of the hot water storage tank 1, and 4 is a hot water storage tank 1 Heat pump heating means 5 for heating the hot water in the hot water tank 5 connects the lower part of the hot water tank 1, the heat pump type heating means 4 and the upper part of the hot water tank 1 so that hot water in the hot water tank 1 can be circulated. Although not shown, hot water in the hot water storage tank 1 and the heat pump heating means 4 is circulated by a heat pump circulation pump provided in the middle of the heat pump circulation circuit 5.

  6 is a water supply bypass pipe that branches in the middle of the water supply pipe 2, and 7 is a hot water supply that mixes hot water flowing through the hot water discharge pipe 3 and city water flowing through the water supply bypass pipe 6 at an appropriate ratio to adjust the hot water supply set temperature or bath set temperature. A mixing valve, 8 is a hot water supply pipe through which the mixed water mixed in the hot water supply mixing valve 7 flows, 9 is a hot water tap for supplying mixed water from the hot water supply pipe 8, and 10 is a flow rate of hot water provided in the middle of the hot water supply pipe 8 A flow sensor 11, a hot water temperature sensor 11 for detecting the temperature of the mixed water mixed by the hot water mixing valve 7, and a flow rate adjusting valve 12 for adjusting the hot water flow rate of the mixed water mixed by the hot water mixing valve 7.

  13 is a bath heat exchanger for exchanging heat with hot water in the upper part of the hot water storage tank 1, 14 is a bathtub, 15 is a bath circulation circuit for connecting the bath heat exchanger 13 and the bathtub 14 so that hot water can circulate, and 16 is a bath circulation circuit. 15 is a bath circulation pump provided in the middle of 15.

  The control device 17 responsible for the operation control of the hot water supply operation and the bath operation arbitrarily determines the valve opening degree of the flow rate adjusting valve 12 so that the arbitrarily determined hot water supply set flow rate and the detected value detected by the flow sensor 10 are equal. The opening degree of the hot water supply mixing valve 7 is controlled so that the detected hot water temperature and the detected value detected by the hot water temperature sensor 11 are equal.

  Moreover, the hot water storage tank 1 prevents heat dissipation from the hot water storage tank 1 by covering the upper part with the upper heat insulating material 18, the lower part with the lower heat insulating material 19, and the side surfaces with the left side heat insulating material 20 and the right side heat insulating material 21. . The upper heat insulating material 18 is composed of a circumferential portion 18a opened at a position corresponding to the tap water pipe 3, and a lid portion 18b covering the opening. Further, the lid portion 18b of the upper heat insulating material 18 has a horizontal portion 22 on the tank side surface in which a concave recess portion is substantially horizontal.

Next, the hot water supply operation will be described.
Next, when the hot water tap 9 is opened and hot water is supplied, the pressure on the hot water supply pipe 8 side is reduced, and the water supplied from the water supply pipe 2 is supplied from the lower part of the hot water storage tank 1. Is pushed out to the hot water pipe 3. On the other hand, the water supply from the water supply pipe 2 is mixed with the hot water from the hot water discharge pipe 3 by the hot water supply mixing valve 7 through the water supply bypass pipe 6 and supplied to the hot water tap 9 through the hot water supply pipe 8.

Next, the outlet pipe 3 of the water heater will be described with reference to FIG.
The hot water discharge pipe 3 is composed of an upstream hot water supply pipe 23 that extends substantially vertically upward from the top of the hot water storage tank 1, a bent part 24 that is bent, and a downstream hot water supply pipe 25 that connects the bent part 24 and the hot water supply mixing valve 7. Has been. Further, a pipe heat insulating material 26 is wound around the downstream hot water discharge pipe 20 to prevent heat dissipation of the hot water discharge pipe 3, and the pipe heat insulating material 26 is piped from below at least about the width of the pipe heat insulating material 26 than the horizontal portion 22. Begin to wind the insulation 26.

  The hot water discharge pipe 3 is made of a stainless steel material having a high strength, and when the bending process is performed, a sufficient holding allowance is required as compared with the case of the copper pipe. It is configured to be longer than a predetermined length.

  Thus, by securing the upstream side hot water discharge pipe 23 longer than the length of the gripping allowance, it is possible to easily perform the bending process even with the pipe made of stainless steel.

  Further, the upstream side hot water discharge pipe 23 extending vertically upward from the upper part of the hot water storage tank 1 is bent downward at an angle smaller than the horizontal by the bending portion 24 so that the bending angle is an acute angle (88 ° in this case). The tube 23 is configured to be inclined downward.

  Then, since the holding margin is secured, the upstream side hot water discharge pipe 23 becomes longer than the copper pipe, and the portion of the hot water discharge pipe 3 which is at the highest position comes into contact with the lid portion 18b of the conventional upper heat insulating material 18. Therefore, since it cannot be assembled well, a copper pipe is provided at the portion where the outlet pipe 3 and the lid portion 18b of the upper heat insulating material 18 are in contact with each other to ensure the length of the holding portion of the lid portion 18b of the upper heat insulating material 18 Further, the recessed portion is constituted by the lid portion 18b of the upper heat insulating material 18 which is deeper than the extended portion.

  Thus, by using the lid portion 18b of the upper heat insulating material 18 having a deep recessed portion, the lid portion 18b of the upper heat insulating material 18 can be easily obtained even if the upstream side hot water discharge pipe 23 becomes long in order to secure the gripping allowance. Can be stored inside.

  Further, the tank-side surface of the lid portion 18b of the upper heat insulating material 18 has a horizontal portion 22 that is substantially horizontal, and the downstream side that extends obliquely downward with the horizontal portion 22 of the lid portion 18b of the upper heat insulating material 18. As for the tap hot water pipe 25, since the space | interval of the horizontal part 22 and the downstream hot water hot water pipe 25 gradually leaves | separates, compared with the case where the bending part 24 is made into L shape like FIG. The thickness of the lid portion 18b of the heat insulating material 18 is not changed to reduce the heat insulating effect, and a gap is created because the gap is separated, and the pipe heat insulating material 26 is wound around the inside of the heat insulating material so that the pipe diameter is reduced. Even if it becomes large, the downstream side hot water discharge pipe 25 can be easily accommodated.

  The present invention is not limited to the embodiment and does not prevent modification without changing the gist. For example, in the present invention, the lid portion 18b of the upper heat insulating material 18 is molded and used. However, the surface on the tank side of the heat insulating material 103 as shown in FIG. 4 is cut so that the recessed portion is substantially horizontal and the recessed portion is deepened, so that the lid portion 18b of the current upper heat insulating material 18 is formed. Can be used as

  In the present invention, the hot water discharge pipe 3 is made of stainless steel, but a pipe through which high temperature hot water flows, such as the hot water supply pipe 8 and the heat pump circulation circuit 5, can be made of stainless steel.

  Further, in the present invention, the pipe heat insulating material 26 starts to be wound from the lower side of the width of the pipe heat insulating material 26 than the horizontal portion 22, but the lid portion 18 b of the upper heat insulating material 18 is assembled to the hot water storage tank 1. In order to prevent the cover 18b of the upper heat insulating material 18 from floating at the thickness of the pipe heat insulating material 26 from time to time, the heat insulating effect due to sealing cannot be exhibited. If not disturbing, the predetermined value from the horizontal portion 22 may be determined appropriately.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply pipe 3 Hot water discharge pipe 4 Heat pump type heating means 7 Hot water supply mixing valve 8 Hot water supply pipe 9 Hot water tap 18 Upper heat insulating material 18a Circumferential part 18b Lid part 22 Horizontal part 23 Upstream side hot water discharge pipe 24 Bending part 25 Downstream side hot water supply Pipe 26 Pipe insulation

Claims (1)

A hot water storage tank for hot water storage hot water, the heating means for heating the hot water of the hot water storage tank, the hot water storage and water supply pipe for supplying water to the tank, stainless for tapping hot water in the hot water storage tank from the hot water storage tank substantially top A hot water supply pipe formed from the above, a water supply bypass pipe branched from the water supply pipe, a hot water supply mixing valve for mixing hot water from the hot water supply pipe and water from the water supply bypass pipe, an upper part of the hot water storage tank, and the hot water supply An upper heat insulating material that covers at least a part of the pipe and prevents heat radiation is provided, and the hot water discharge pipe includes an upstream hot water discharge pipe that extends vertically upward from the hot water storage tank, a bent portion that is bent, and the bent portion. A hot-water storage hot water supply apparatus having a hot water outlet pipe connected to the hot water supply mixing valve from the downstream side, and having a hot water outlet pipe integrally formed with the upstream hot water outlet pipe, the bent portion, and the downstream hot water outlet pipe. On the underside of Have a substantially horizontal portion, said tapping tube, along with longer than gripping allowance predetermined length necessary when bending at least the tapping tube, connected to the hot water storage tank below the substantially horizontal portion and the upstream tapping pipe, the bent portion and a said downstream tapping tube Ru extending inclined downward from the horizontal direction by, the downstream tapping pipe, in order to prevent the heat dissipation of the downstream tapping pipe comprising a pipe insulation, the downstream tapping pipe, downstream from the predetermined value below which it is the pipe insulation or thickness of the gap between the substantially horizontal portion the substantially horizontal portion and the downstream tapping pipe than A hot water storage type hot water supply machine, wherein the pipe heat insulating material is wound toward the side .

Images