JP2010230203A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of preventing damage to a coiled tube in a hot water storage tank without requiring special parts or work. <P>SOLUTION: The hot water storage type water heater is equipped with the hot water storage tank 1 storing hot and cold water, the coiled tube 17 used as an indirect heat exchanger disposed in the hot water storage tank 1, an upper part connection port 114 and a lower part connection port 115 connecting the coiled tube 17 and external piping, and a supporting means 116 for supporting the coiled tube 17 by abutting on a piping lower part face. By forming a triangle of straight lines connecting installed portions of the upper part connection port 114, the lower part connection port 115, and the supporting means 116 being fulcrums of the coiled tube 17, since a fulcrum where shaking becomes maximum is distributed to the three points and a load applied to the coiled tube 17 is reduced, damage caused by the vibration of the coiled tube 17 can be prevented without providing additional parts. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water heater that performs reheating, heat insulation, floor heating, and the like of bathtub water by exchanging heat with hot water in a hot water storage tank for storing hot water.

Conventionally, in this type of hot water storage type hot water heater, there has been one as shown in FIG.
Here, 210 is a hot water storage tank for storing hot water, 220 is a heating means for heating hot water in the hot water storage tank 210, 230 is a hot water supply circuit for supplying hot water in the hot water storage tank 210, 240 is a bathtub, and 250 is in the hot water storage tank 210. A snake pipe 260 as an indirect heat exchanger is connected to the bathtub 240 and the snake pipe 250 so as to be circulated.

  By taking such a configuration, the remaining hot water in the bathtub 240 is circulated through the bath circulation circuit 260 and circulated through the serpentine tube 250 installed in the hot water storage tank 210, so that the hot water in the bathtub 240 can be chased or Some were able to keep warm.

  Here, the configuration of the hot water storage tank 210 will be described in detail with reference to the cross-sectional view of FIG. 5. The hot water storage tank 210 includes a cover-like upper end plate 211, a cylindrical body 212, and a bowl-like lower end plate 213. The upper connection port 214 and the lower connection port 215 are provided on the outer wall of the hot water storage tank 210 and connected to the straight line drawn in the height direction by connecting the serpentine tube 250 and the external piping.

  Further, although not shown or described in detail about the support of the conventional serpentine tube 250, the upper connection port 214 and the lower connection port 215 are opposed to each other in the hot water storage tank 210 from the longitudinal sectional view of FIG. 6. There was a supporting means 216 provided on the surface to be in contact with one end surface of the lower part of the pipe constituting the serpentine tube 250. (For example, see Patent Document 1)

JP 2004-144370 A

  However, in this conventional type, for example, when a vibration due to vibration occurs when the product is transported, the width of the serpentine tube is large due to the position and shape of the installation, and even if there is a support means, There was a risk of being damaged without being fully impacted.

  In order to solve the above-mentioned problems, in claim 1 of the present invention, a hot water storage tank for storing hot water and an indirect heat exchanger that is located inside the hot water storage tank and obtains heat using hot water in the hot water storage tank are provided. A serpentine tube, and an upper connection port and a lower connection port on the outer wall portion of the hot water storage tank that connect the serpentine tube and external piping, and support means provided inside the hot water storage tank to support the serpentine tube. The upper connection port and the lower connection port are arranged at positions separated from each other on the left and right sides so that a straight line connecting to the support means forms a triangle.

  According to the present invention, the supporting means that maximizes the shaking of the serpentine tube and the upper connection port and the lower connection port of the serpentine tube are arranged so as to form a triangle, so that the fulcrum that maximizes the swing is dispersed at three points. By reducing the load on the hot water storage tank, it is possible to prevent damage to the snake tube even when an excessive impact is applied to it, and new parts can be added by changing the installation location of the snake tube connection port It is easy to configure and can be provided at low cost.

Schematic configuration diagram of a hot water storage type water heater representing an embodiment of the present invention Cross-sectional view of the hot water storage tank of the present invention Longitudinal sectional view of the hot water storage tank of the present invention Schematic configuration diagram of a conventional hot water storage type water heater Cross-sectional view of a conventional hot water storage tank Vertical section of a conventional hot water storage tank

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention. 1 is a hot water storage tank for storing hot water, 2 is a heat pump unit as means for heating the hot water, and 3 is a bathtub.

  A heating circulation circuit 4 connects the hot water storage tank 1 and the heat pump unit 2 so as to be circulated. The heating circulation circuit 5 has a heating circulation pump 5 and is connected to the lower part of the hot water storage tank 1 and a heat pump connected to the upper part of the hot water storage tank 1. It is composed of a return pipe 4b, and the low temperature water at the bottom of the hot water storage tank 1 is heated by the heat pump unit 2 through the heat pump forward pipe 4a, and the heated high temperature water is returned from the heat pump return pipe 4b to the top of the hot water storage tank 1 into Hot water is stored by heating. The hot water storage tank 1 has a plurality of temperature thermistors 6a, 6b, 6c, 6d in the vertical direction, and the temperature thermistor detects the amount of hot water stored when it detects a predetermined temperature or more. .

  7 is a water supply pipe for supplying water to the hot water storage tank 1, 8 is a hot water discharge pipe for discharging hot water in the hot water storage tank 1, and 9 is a set temperature of low temperature water from the water supply pipe 7 and high temperature water from the hot water discharge pipe 8. A mixing valve 10 for mixing with the hot water 10 is a hot water supply pipe for supplying hot water having a mixed set temperature, and 11 is a hot water tap provided at the end of the hot water supply pipe 10. 12 is a hot water supply temperature sensor provided downstream of the mixing valve 9, and 13 is a hot water supply flow rate sensor for counting the amount of hot water supply. In addition, 14 is a pressure reducing valve for reducing tap water to a predetermined pressure, and 15 is a pressure relief valve for releasing overpressure caused by heating.

  Reference numeral 16 denotes a bath circulation circuit, which connects the spiral serpentine tube 17 constituting the indirect heat exchanger provided in the hot water storage tank 1 and the bathtub 3 so as to be circulated by a bath outlet tube 16a and a bath return tube 16b. is there. 18 is a bath circulation pump provided in the bath circulation circuit 16, 19 is a running water sensor that detects the presence or absence of running water, 20 is a bath temperature sensor that detects the temperature of bath water flowing through the bath circulation circuit 16, and 21 is the water pressure of bath water. It is a water level sensor which detects the water level in bathtub 3 from.

  Reference numeral 22 denotes a bypass pipe that bypasses the snake pipe 17 and connects the bath outlet pipe 16a and the bath return pipe 16b. The flow path switching means 23 is a three-way valve that is placed at an intermediate position and communicates with all three sides. It is provided at the connection portion of the return pipe 16b, and it can be selected whether hot water flowing through the bath circulation circuit 16 is caused to flow through the snake pipe 17.

  A hot water filling pipe 24 is branched from the middle of the hot water supply pipe 10 and connected to the bath circulation circuit 16 to fill the bathtub 3 with water. A hot water filling valve 26 for stopping is a bath flow sensor for counting the amount of hot water filling the bathtub 3. In addition, 27 is a two-way valve provided between the hot water filling pipe 24 and the water level sensor 21. When the hot water is filled, the valve is temporarily opened to perform air purge of the piping from the hot water filling pipe 24 of the bath return pipe 16b to the bathtub 3. Thereafter, the valve is closed so that the water level can be filled while monitoring the accurate water level with the water level sensor 21.

  Reference numeral 28 denotes a heating control unit that controls the heating of the heat pump unit 2, and reference numeral 29 denotes a hot water bath control unit that controls hot water and bath.

Next, the characteristic operation of this hot water storage type water heater will be described below.
When bath rebirth is instructed by a remote controller (not shown) connected to the hot water bath control unit 29, the bath hot water control unit 29 switches the flow path switching means 23 to the side of the serpentine tube 17 and bath circulation pump 18 The bathtub water in the bathtub 3 is circulated through the hot water in the hot water in the hot water storage tank 1 and the hot water stored in the hot water tank 1 is used to heat the hot water in the hot water. . Since the hot water in the hot water storage tank 1 can be used to chase or keep warm water in the bathtub 3, an electric heater dedicated to chasing or keeping warm is not required, and cost and power consumption can be reduced.

  Next, the hot water storage tank 1 will be described with reference to the cross-sectional view shown in FIG. 2. A cover-shaped upper end plate 111 formed of a stainless steel plate by deep drawing and a body 112 formed of a stainless steel plate in a cylindrical shape. And a bowl-shaped lower end plate 113 formed by deep drawing a stainless steel plate.

  The hot water storage tank 1 is provided with a serpentine tube 17 in which a stainless steel tube is wound in a coil shape as an indirect heat exchanger, and its end is located on the outer wall of the hot water storage tank 1 and is shifted from a straight line in the height direction. The upper connection port 114 and the lower connection port 115 can be connected to an external pipe, and the support means 116 is provided so as to contact one end surface of the lower part of the pipe constituting the serpentine pipe 17.

Here, the detail regarding support of the serpentine tube 17 in the hot water storage tank 1 is demonstrated using the longitudinal cross-sectional view shown in FIG.
The upper connection port 114 and the lower connection port 115 serving as the fulcrum of the snake tube 17 form a triangle by connecting the support means 116, which is also the fulcrum, and the installation location with straight lines.

  Therefore, by making the upper connection port 114, the lower connection port 115, and the support means 116, which are fulcrums of the serpentine tube 17 where vibrations are maximized, at three points shifted from the same straight line, the serpentine tube 17 is set in the vertical direction. Since it can be supported in the lateral direction, it is possible to reduce the possibility of the snake tube 17 being damaged even when subjected to excessive shaking.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 114 Upper connection port 115 Lower connection port 116 Support means 17 Serpentine tube

Claims (1)

  A hot water storage tank for storing hot water, a serpentine tube as an indirect heat exchanger inside the hot water storage tank for obtaining heat using the hot water in the hot water storage tank, and the serpentine tube and an external pipe on the outer wall of the hot water storage tank. What is provided with an upper connection port and a lower connection port to be connected, and support means provided inside the hot water storage tank so as to support the serpentine tube, the upper connection port and the lower connection port are left and right A hot water storage type hot water heater, characterized in that a straight line connected to the support means is formed in a triangle at a spaced position.

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