JP2007064493A - Hot water storage tank unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure capable of easily carrying out connection work of a drain pipe arrangement in a narrow exterior package case. <P>SOLUTION: Bottoms of hot water storage tanks 3, 4 are communicated with each other via a three way valve 24 to form a common drain passage, and opening and closing operation of the three way valve 24 is carried out manually by an operation handle 25 extended from an opening and closing shaft of the three way valve 24. The operation handle 25 is arranged with a predetermined gap in a pipe arrangement connection space of a casing front face. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hot water storage tank unit, and more particularly to a drainage configuration of two tanks.

  Conventionally, as shown in Patent Document 1, this type of hot water storage tank unit is configured to cover a large capacity hot water storage tank with an exterior case and to provide a connection portion with an external pipe below the front surface portion. Since it is a hot water storage tank, the outer diameter of the tank is large, and the width of the outer case that accommodates the tank is wide. For this reason, the piping in the main body can also be arranged in a horizontal row on the front surface, and can be easily connected to the external piping (for example, see Patent Document 1).

However, in recent years, there has been an increasing demand for installation in confined areas such as installation in apartment houses, and a hot water storage tank unit having a small width of the outer case has become necessary. In terms of function, not only the conventional hot water supply but also a built-in bath reheating circuit or heating circuit is required. With the addition of this function, the number of pipes in the main body has also increased, and in addition to the conventional water supply pipe and hot water supply pipe, it has increased three times, such as a recirculation forward pipe, a return pipe, a heating forward pipe, and a return pipe. Furthermore, if a plurality of tanks are used to realize a hot water storage tank unit with a small width of the outer case, the number of pipes for draining the water increases.
JP 2004-144437 A

  However, in the above conventional configuration, the main body pipes are arranged in a horizontal row on the front surface of the wide exterior case. Therefore, if the number of main body pipes increases, it is necessary to reduce the distance between them and connect with external pipes. The work was difficult.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a connection configuration that can easily connect to external piping by reducing the number of main body piping as much as possible in a narrow exterior case. .

  In order to achieve the above object, a hot water storage tank unit according to the present invention is a hot water storage tank unit having a narrow casing structure in which two hot water storage tanks for storing hot water are arranged in the front-rear direction, and a three-way valve is provided at the bottom of each hot water storage tank. The three-way valve is opened and closed manually by an operation handle connected to and extending from the opening and closing shaft of the three-way valve. The pipe connection space is provided with a predetermined gap.

  According to the above invention, in order to correspond to installation in a confined area such as an apartment house, a two-piece hot water storage tank having a small tank outer diameter is connected in series to ensure a necessary capacity, In a narrow casing configuration, the drainage from two hot water storage tanks can be integrated into one, and only the operation handle is desired on the front of the casing, so that the increased gap in the main body piping can be effectively utilized. The drainage piping work can be done easily.

The hot water storage tank unit of the present invention has a narrow casing structure that secures the required capacity by connecting two hot water storage tanks having a small tank outer diameter in series, so that it can be installed in confined areas such as apartment buildings. In this narrow casing configuration, the drainage from the two hot water storage tanks is consolidated into one, and only the operation handle is desired on the front of the casing, thereby increasing the gap in the main body piping. Can be used effectively, and drainage piping work can be easily performed.

  A first aspect of the present invention is a hot water storage tank unit in which two hot water storage tanks for storing hot water are arranged in the front-rear direction to have a narrow casing structure, and the bottom of each hot water storage tank is communicated via a three-way valve. A path is formed, and the opening / closing operation of the three-way valve is manually performed by an operation handle connected to and extending from the opening / closing shaft of the three-way valve, and the operation handle is placed in a pipe connection space on the front surface of the housing with a predetermined gap. It is characterized by having arranged.

  Then, two hot water storage tanks having a small tank outer diameter are connected in series to form a narrow casing structure that secures the required capacity. In this narrow casing structure, the drainage from the two hot water storage tanks is 1 By gathering them individually and making only the operation handle desired on the front surface of the housing, the increased gaps in the main body piping can be used effectively, and drainage piping work can be performed easily.

  According to a second aspect of the present invention, a pressure relief valve connected to a hot water storage tank and an edge cutting device are provided, and a drain pipe connected to the pressure relief valve and the edge cutting device is disposed in a gap formed between the operation handle and the front surface of the casing, and a drainage path. The drainage pipe connected to the pressure relief valve and the edge-cutting device is drained in the gap formed by the operation handle and the front of the housing, thereby effectively utilizing the dead space. This makes it possible to effectively use the narrow piping space. Further, the drainage pipe connected to the drainage path of the hot water storage tank, the pressure relief valve and the edge cutting device can be located in the vicinity, and drainage piping work by external work can be easily performed.

  According to a third aspect of the present invention, the drain pipes of the two hot water storage tanks are connected horizontally to the opening / closing axis of the three-way valve, and a common drainage path is provided vertically below the opening / closing axis of the three-way valve. It is a feature.

  By doing so, the drainage path of the hot water storage tank, the pressure relief valve, and the drainage pipe connected to the edge cutting device can be located in the vicinity, and drainage piping work by external work can be easily performed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is an overall configuration diagram of a hot water storage tank unit according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the hot water storage tank unit, FIG. 3 (a) is a front view of the hot water storage tank unit, and FIG. FIG. 4 is a front sectional view of the hot water storage tank unit, FIG. 5 is a detailed view of the vicinity of the drain valve of the hot water storage tank unit, (a) is a top view, and (b). (C) is a side view, FIG. 6 is a detailed sectional view of a drain valve, (a) is a top view, (b) is a front view, and (c) is a side view.

In the figure, 1 is a hot water storage tank unit of a heat pump water heater, and 2 is a heat pump unit which is a heat source machine. 3 is a cylindrical first hot water storage tank, and 4 is a second hot water storage tank. 5 is a water pipe, 6 is a pressure reducing valve for reducing the water supply pressure, 7 is a water supply pipe, 8 is a heating pump for supplying water in the hot water storage tanks 3 and 4 to the heat pump unit 2, and 9 is a heating to the heat pump unit 2 The forward piping connection port 10 is a heating return piping connection port from the heat pump unit 2. An electric mixing valve 11 is connected to a hot water supply pipe 12 and a water supply pipe 7 connected to the second hot water storage tank 4 by piping, and opens a valve body (not shown) built in according to a set temperature. It is set as the structure which obtains mixed water of desired temperature by controlling a degree ratio. Reference numeral 13 denotes a hot water outlet pipe connected to a currant 14 which is a hot water supply port. Reference numeral 15 denotes a bath pouring open / close valve with an edge cutting device function connected to a bath pipe 16 piped to the hot water storage tank 4. Reference numeral 17 denotes a bathtub, which is connected to the hot water storage unit 1 and includes a bathtub circulation port W for performing hot water filling and chasing to the bathtub 17. Reference numeral 18 is a bath outlet pipe connection port, and 19 is a bath return pipe connection port.

  A pipe connection part for connecting the external pipe 20 and the main body internal pipe 21 is provided on the front side of the hot water storage tank unit 1, and a pipe connection space is provided below the pipe connection part.

  24 is a three-way valve drain valve, and 25 is an operation handle. The operation handle 25 is connected to the rotary shaft 26 of the drainage valve 24 via a housing, and is disposed below the pipe connection space. A drain pipe 27 from the first hot water storage tank 3 and a drain pipe 28 from the second hot water storage tank 4 are connected in the horizontal direction of the drain valve 24. In addition, a drain outlet 29 which is a common drain path is provided vertically below.

  30 is a relief valve for discharging the expanded water at the time of boiling, and 31 is a relief valve pipe for discharging the expanded water out of the housing. Reference numeral 32 denotes an edge cutting valve pipe for draining backflow water from the bathtub 17 to the outside of the casing by the bath pouring on / off valve 15 with an edge cutting device function.

  The tip portions of the relief valve pipe 31 and the edge cut valve pipe 32 are arranged in the gap between the operation handle 25 and the casing outer case.

  Next, the operation will be briefly described with reference to the drawings.

  The water introduced from the water pipe 5 is reduced to a predetermined pressure by the pressure reducing valve 6 and stored in the hot water storage tanks 3 and 4. The stored water is guided to the heat pump unit 2 by the boiling pump 8 through the boiling forward piping connection port 9. The guided water is heat-exchanged with the heat collected from the outside air in the heat pump unit 2 to become hot water, and is stored in the hot water storage tanks 3 and 4 through the boiling return pipe connection port 10. At that time, the expanded water expanded by boiling is drained from the relief valve 30 to the outside through the relief valve pipe. The stored hot water is adjusted to a predetermined temperature by an electric mixing valve 11 and discharged from a currant 14 through a hot water discharge pipe 13. Further, by opening the bath pouring on / off valve 15 with a rim cutting function, the hot water in the bathtub 17 is filled in the bathtub from the bath circulation port W provided in the bathtub 17 through the bath outlet pipe connection port 18. When cooled, the bath circulation pump 22 is operated to store the water in the bathtub 17 in the hot water storage tanks 3 and 4 by the heat exchanger 23 provided in the hot water storage tank unit 1 through the bath return pipe connection port 19. The water is exchanged with the hot water and is returned to the bathtub 17 through the bath outlet pipe connection port 18 at a predetermined hot water temperature.

  In addition, when a check valve (not shown) built in the bath pouring on / off valve 15 with the edge cutting function fails, the edge cutting valve pipe 32 prevents the sewage in the bathtub 17 from flowing back into the hot water storage tanks 3 and 4. The water is drained to the outside.

  Further, by operating the operation handle 25, the water stored in the hot water storage tanks 3 and 4 is drained to the outside through the drain port 29.

  As described above, the hot water storage tank unit of the present invention has been increased by consolidating the drainage water from the two hot water storage tanks into one in a narrow outer case, and by requiring only the operation handle on the front surface of the housing. The gap between the main pipes can be used effectively, and drainage piping work can be easily performed.

The whole block diagram of the hot water storage tank unit in the 1st Embodiment of this invention Cross section of the hot water storage tank unit (A) (b) Detailed piping connection of the hot water storage tank unit Front sectional view of the hot water storage tank unit (A) (b) (c) Detailed view of the vicinity of the drain valve of the hot water storage tank unit (A) (b) (c) Detailed cross-sectional view of the drain valve of the hot water storage tank unit

Explanation of symbols

1 Hot water storage tank unit 2 Heat pump unit 3 Hot water storage tank 4 Hot water storage tank 24 Drain valve (three-way valve)
25 Operation handle 29 Drain port 31 Relief valve pipe 32 Edge cutting pipe

Claims (3)

In the hot water storage tank unit which has two hot water storage tanks for storing hot water in the front-rear direction and has a narrow casing structure, the bottom of each hot water storage tank is connected via a three-way valve to form a common drainage path, The opening / closing operation of the three-way valve is manually performed by an operation handle connected to and extending from the opening / closing shaft of the three-way valve, and the operation handle is disposed in a pipe connection space on the front surface of the housing with a predetermined gap. Hot water storage tank unit. A pressure relief valve connected to the hot water storage tank and an edge cutting device are provided, and a drain pipe connected to the pressure relief valve and the edge cutting device is disposed in a gap formed between the operation handle and the front surface of the housing and guided to the drainage path. Item 2. A hot water tank unit according to item 1. 2. The hot water storage tank unit according to claim 1, wherein drain pipes of two hot water storage tanks are connected horizontally to the opening / closing axis of the three-way valve, and a common drainage path is provided vertically below the opening / closing axis of the three-way valve. .

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