JP2016217570A - Valve device and hot water storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve device capable of effectively using hot water stored in a tank at the time of fire accident.SOLUTION: A valve device includes: a valve storage part 39 that has a flow passage 39a capable of being connected to a pipeline 25 in which fluid fluidizes; a first valve body 40 that is provided in the valve storage part 39 so as to be able to move to a valve closing of closing one side and the other side of the flow passage 39a, and a valve opening position of communicating between the one side and other side of the flow passage 39a, and that has a cavity part 43 communicating between the one side of the flow passage 39a and the outside of the valve storage part 39; and a second valve body 41 that inhibits or allows fluidization of fluid through the cavity part 43.SELECTED DRAWING: Figure 5

Description

  Embodiments described herein relate generally to a valve device and a hot water storage type hot water supply device including the valve device.

  In recent years, hot water storage type hot water supply devices that store tap water in a tank and boil the tap water have become widespread. As a valve device for discharging hot water (hot water or water) in a tank in such a hot water storage type hot water supply device to the outside of the tank, for example, one described in Patent Document 1 below is known. In the valve device described in Patent Document 1, an opening / closing valve such as a ball valve is provided in a water channel of hot water discharged from a tank, and further, expansion water from the tank is supplied to a valve housing that accommodates the opening / closing valve. A drain pipe for draining, a drain pipe for draining bath water, a drain pipe for preventing overpressure, and the like are connected. Hot water drained into the valve housing through various drain pipes is drained to the drain groove side regardless of the open / close state of the on-off valve.

JP 2010-2061 A

  However, with the valve device described in Patent Document 1, hot water in the tank cannot be effectively used as drinking water or the like in the event of a disaster such as an earthquake or flood.

  The objective of embodiment of this invention is related with the hot water storage type hot water supply apparatus provided with the valve apparatus which can utilize the hot water stored in the tank effectively at the time of disaster occurrence, etc.

  The valve device according to the embodiment includes a valve housing portion having a flow path connectable to a pipe through which a fluid flows, a valve closing position for closing one side and the other side of the flow path in the valve housing portion, and one of the flow paths. A first valve body movably provided at a valve opening position that communicates the side and the other side, and the first valve body has a hollow portion that communicates with one side of the flow path and the outside of the valve housing portion, And a second valve body for preventing or allowing fluid to flow through the cavity.

It is a system diagram of a hot water storage type hot water supply apparatus. It is a disassembled perspective view which shows the structure of a 2nd valve apparatus. It is sectional drawing in case a 1st valve main body is located in a valve closing position, and a 2nd valve main body is located in a valve closing position. It is sectional drawing in case a 1st valve main body is located in a valve opening position, and a 2nd valve main body is located in a valve closing position. It is sectional drawing in case a 1st valve main body is located in a valve closing position, and a 2nd valve main body is located in a valve opening position. It is a perspective view which shows the state in which the 2nd valve apparatus is accommodated in the tank case which covers a tank.

  Hereinafter, an embodiment will be described based on the drawings. FIG. 1 is a system diagram of a heat pump type hot water storage type hot water supply apparatus 1, and the hot water storage type hot water supply apparatus 1 includes a heat pump unit 2, a tank unit 3, and a control unit 4. This hot water storage type hot water supply apparatus 1 is connected to a bathtub 5 as one of hot water and hot water supply parts to which hot water (hot water and water) is supplied, and in the bathroom 6 where the bathtub 5 is installed, the hot water supply conditions for the bathtub 5 are provided. A remote controller 7 is provided for setting and the like. The control unit 4 includes a CPU, a ROM, a RAM, and the like, and controls each component of the hot water storage type hot water supply device 1. For example, on / off control of the operation of the heat pump unit 2 is provided in the tank unit 3. On / off control of a circulation pump described later, switching control of a switching valve described later provided in the tank unit 3 and the like are performed.

  The heat pump unit 2 includes a compressor 8 that compresses the refrigerant, a heat exchanger 9 on the heat radiation side that condenses the compressed refrigerant, an expansion valve 10 that expands the condensed liquid refrigerant, and vaporizes the expanded refrigerant. And a heat exchanger 11 on the heat absorption side. In the heat exchanger 9 on the heat radiation side, a refrigerant pipe 12 through which refrigerant flows is provided, and a hot water pipe 13 through which hot water flows is provided.

  The tank unit 3 includes a tank 14 for storing hot water, a water supply pipe 16 connected between the water pipe 15 and the lower part of the tank 14 for supplying tap water into the tank 14, an upper part of the tank 14 and a hot water use part. (For example, a supply pipe 17 connected between the bathtub 5, a washroom, a kitchen, etc.), a first pipe 18 connected between the lower part of the tank 14 and the inlet side of the heat exchanger 9, and heat The second pipe 19 connected between the outlet side of the exchanger 9 and the upper part of the tank 14, the bathtub supply pipe 20 branched from the middle of the supply pipe 17 and connected to the bathtub 5, and the middle of the supply pipe 17 The reheating tank side pipe 22 connected to the vertical center of the tank 14 after passing through the reheating heat exchanger 21 and connected to the bathtub 5 with one end connected to the bathtub 5. After passing through 21, the other end is the bathtub supply pipe 20. And a tub side pipe 23 for connected reheating. A plurality of temperature sensors 24 that detect the temperature of hot water in the tank 14 are attached to the tank 14 along the vertical direction of the tank 14. These temperature sensors 24 are connected to the control unit 4 and transmit the detected temperature to the control unit 4.

  In the lower part of the tank 14, as described above, a water supply pipe 16 for supplying tap water into the tank 14 and a first pipe 18 for supplying hot water in the tank 14 to the heat exchanger 9 of the heat pump unit 2. And are connected. Further, a discharge pipe 25 that is a pipe for discharging hot water in the tank 14 to the outside of the tank 14 is connected to the lower portion of the tank 14. An expansion water discharge pipe 26 for discharging expansion water is connected to the upper portion of the tank 14. A first valve device 27 for preventing negative pressure breakage and high pressure breakage of the tank 14 is provided on the lower side of the tank 14 in the middle of the water supply pipe 16. A second valve device for draining hot water discharged from the tank 14 toward the drainage groove and taking hot water in the tank 14 as drinking water or the like is provided below the discharge pipe 25 and the expansion water discharge pipe 26. 28 is provided.

  In the middle of the supply pipe 17, a supply mixing valve 29 for adjusting the temperature by mixing hot water taken out from the upper part of the tank 14 and tap water supplied through the water supply pipe 16 is provided. Hot water adjusted in temperature by a supply mixing valve 29 is supplied to a hot water use section (for example, a washroom or a kitchen). The supply mixing valve 29 is connected to the control unit 4 so that the opening degree is adjusted by an instruction from the control unit 4.

  A first temperature sensor 30 that detects the temperature of hot water entering the heat exchanger 9 is provided in the middle of the first pipe 18. A second temperature sensor 31 that detects the temperature of hot water passing through the heat exchanger 9 and exiting the heat exchanger 9 is provided in the middle of the second pipe 19. The first and second temperature sensors 30 and 31 are connected to the control unit 4 so as to transmit the detected temperature to the control unit 4.

  Further, a circulation pump 32 is provided in the middle of the first pipe 18. The circulation pump 32 takes out hot water in the tank 14 from the lower side of the tank 14, and passes the taken hot water through the first pipe 18, the hot water pipe 13 of the heat exchanger 9, and the second pipe 19. The water is then returned to the upper part of the tank 14.

  Between the 2nd piping 19 and the 1st piping 18, the return piping 33 which returns the hot water which flows through the inside of the 2nd piping 19 to the 1st piping 18 is provided. In addition, a switching valve 34 is provided in the middle of the second pipe 19 to switch whether hot water flowing in the second pipe 19 is led to the upper part of the tank 14 or to the return pipe 33. The switching valve 34 is connected to the control unit 4 so that switching control is performed according to an instruction from the control unit 4.

  A bathtub mixing valve 35 and a solenoid valve 36 are provided in the middle of the bathtub supply pipe 20 to adjust the temperature by mixing hot water taken out from the upper part of the tank 14 and tap water supplied through the water supply pipe 16. It has been. The bathtub 5 is supplied with hot water adjusted in temperature by the bathtub mixing valve 35. This bathtub mixing valve 35 is connected to the control unit 4, and the opening degree is adjusted by an instruction from the control unit 4. The electromagnetic valve 36 is connected to the control unit 4 and is opened when a supply instruction to the bathtub 5 is given.

  In the middle of the reheating tank side pipe 22, a reheating tank side pump 37 is provided. The reheating tank side pump 37 takes out hot water from the upper part of the tank 14 and returns the taken hot water into the tank 14 via the reheating heat exchanger 21.

  In the middle of the reheating tub side piping 23, a reheating tub side pump 38 is provided. The reheating tub side pump 38 takes out hot water in the bathtub 5 and returns the taken hot water to the bathtub 5 through the reheating heat exchanger 21.

  FIG. 2 is an exploded perspective view showing the second valve device 28. The second valve device 28 includes a valve housing part 39 provided in the middle of the discharge pipe 25 for discharging hot water in the tank 14 to the outside of the tank 14, and a first valve body housed in the valve housing part 39. 40 and a second valve body 41 that is partly housed in the first valve body 40 and partly protrudes outside the first valve body 40.

  As shown in FIG. 3, a flow path 39a is provided in the valve accommodating portion 39. The discharge pipe 25 is connected to the flow path 39a, and an expansion water discharge pipe 42 through which expansion water from the tank 14 flows is provided. It is connected.

  The first valve body 40 is formed in a sleeve shape having a hollow portion 43 therein, and is provided so as to be rotatable around a center line. The first valve body 40 is moved to a valve closing position for closing the hot water flow from the tank 14 and a valve opening position for allowing the hot water flow from the tank 14 by being rotated around the center line. It is supposed to be.

  A handle lever 44 is provided on the outer peripheral portion of the first valve body 40 for performing an operation when the first valve body 40 is moved between the valve closing position and the valve opening position. In addition, a D-shaped cut portion 45 having an outer peripheral shape of the first valve main body 40 as a D shape is formed on the outer peripheral portion of the first valve main body 40. Further, a pair of O-rings 46 are attached to the outer peripheral portion of the first valve body 40. A small-diameter portion 47 having a reduced external dimension is formed in a portion between the pair of O-rings 46 on the outer peripheral portion of the first valve body 40.

  The second valve body 41 is formed in a sleeve shape having a hollow portion 48 therein, and is provided so as to be rotatable around a center line. The second valve main body 41 is rotated around the center line to prevent the hot water from flowing through the cavity 43 of the first valve main body 40 and the hot water flows through the cavity 43. It moves to the permissible valve opening position. A hot water intake port 49 is formed at the distal end of the second valve body 41 to take in hot water flowing through the cavity 43 of the first valve body 41 and the cavity 48 of the second valve body 41. A gear-like operation screw 50 is provided on the outer peripheral portion of the second valve main body 41 for performing an operation when the second valve main body 41 is moved between the valve closing position and the valve opening position. An O-ring 51 that closes the flow of hot water from the cavity 43 to the cavity 48 is attached to one end of the second valve body 41 when the second valve body 41 is in the valve closing position.

  FIG. 3 is a cross-sectional view when the first valve body 40 is located at the valve closing position and the second valve body 41 is located at the valve closing position. When the first valve body 40 is positioned at the valve closing position, one side (tank 14 side) and the other side (drainage groove side) of the flow path 39a are closed, and hot water in the tank 14 passes through the discharge pipe 25. It is blocked from flowing through the drainage channel. On the other hand, the expansion water from the tank 14 is allowed to flow in the expansion water discharge pipe 42, and the expansion water passes through the outer peripheral portion of the small-diameter portion 47 of the first valve body 40 and is shown in the drainage groove as indicated by the arrow. It is designed to flow to the side. Further, since the second valve main body 41 is located at the valve closing position, the cavity 43 of the first valve main body 40 and the cavity 48 of the second valve main body 41 are closed by the O-ring 51, Inflow of hot water from the portion 43 to the cavity 48 is prevented.

  FIG. 4 is a cross-sectional view when the first valve body 40 is located at the valve opening position and the second valve body 41 is located at the valve closing position. When the first valve body 40 is located at the valve open position, the hot water in the tank 14 is allowed to flow through the discharge pipe 25 to the drainage groove side as indicated by the arrow.

  FIG. 5 is a cross-sectional view when the first valve body 40 is located at the valve closing position and the second valve body 41 is located at the valve opening position. When the second valve main body 41 is located at the valve open position, the flow of hot water by the O-ring 51 is released, and the cavity 48 of the second valve main body 41 passes through the cavity 43 of the first valve main body 40. It communicates with one side of the flow path 39a. Thereby, the hot water in the tank 14 flows into the cavity 48 of the second valve body 41 from the cavity 43 of the first valve body 40 as indicated by an arrow, and water can be taken from the hot water intake 49. .

  FIG. 6 is a perspective view showing a state in which the second valve device 28 is housed in the tank case 52 that covers the tank 14. The operation screw 50 and the hot water intake port 49 of the second valve body 41 extend to the outside of the tank case 52. An inspection window for inspecting the first valve device 28 is formed in the tank case 52, and an inspection door 53 that can be opened and closed is attached to the inspection window. When the inspection door 53 is closed, one side of the lower end side of the inspection door 53 is in contact with the D-shaped cut portion 45 of the first valve body 40. Further, the first valve body 40 is disposed so that the end of the first valve body 40 abuts against the inner peripheral surface of the tank case 52 when the first valve body 40 moves from the valve closing position to the valve opening position.

  In such a configuration, in the hot water storage type hot water supply apparatus 1, the first valve body 40 is positioned at the closed position and the second valve body 41 is closed at the normal use as shown in FIG. 3. Is located. Thereby, the hot water in the tank 14 is prevented from being discharged to the drain groove side through the discharge pipe 25, and the hot water in the tank 14 is prevented from being discharged (taken in water) from the hot water intake 49. ing.

  When discharging the hot water in the tank 14 to the drainage groove side, as shown in FIG. 4, the first valve body 40 is moved to the valve opening position while the second valve body 41 is maintained at the valve closing position. This movement is performed by opening the inspection door 53 (see FIG. 6) and turning the handle lever 44. When the first valve main body 40 moves to the valve open position, the discharge pipe 25 closed by the first valve main body 40 enters a communication state, and hot water in the tank 14 passes through the discharge pipe 25 and drains as indicated by an arrow. Released to the groove side.

  The first valve body 40 moves in the lateral direction when the first valve body 40 moves from the valve closing position to the valve opening position. However, when the first valve body 40 moves in the lateral direction, the end of the first valve body 40 becomes a tank. It arrange | positions so that the inner peripheral surface of case 52 may contact | abut. Therefore, when the handle lever 44 is turned to move the first valve body 40 to the valve open position, the second valve device 28 is prevented from being damaged by turning the handle lever 44 too much or turning the handle lever 44 too much. Can do.

  In the event of a disaster such as an earthquake or flood, when taking hot water in the tank 14 as drinking water or the like, as shown in FIG. 5, the first valve body 40 is positioned at the valve closing position and the second valve The main body 41 is moved to the valve opening position. During normal use, since the first valve body 40 is located at the valve closing position, an operation for moving the second valve body 41 to the valve opening position may be performed. This operation can be performed by turning the operation screw 50 from the outside of the tank case 52 without opening the inspection door 53.

  When the second valve main body 41 is moved to the valve open position, the cavity 43 of the first valve main body 40 and the cavity 48 of the second valve main body 41 closed by the O-ring 51 are communicated with each other. Hot water flows through the cavity 43 and the cavity 48. Therefore, by placing a container such as a bucket under the hot water intake port 49 or connecting a hose having a required length to the hot water connection port 49, the hot water in the tank 14 is supplied to the hot water via the discharge pipe 25. Water can be taken from the water intake 49. Since the discharge pipe 25 is connected to the lower part of the tank 14, all the hot water in the tank 14 can be effectively taken as drinking water or the like. Further, water can be taken from the tank 14 using the discharge pipe 25 without providing a dedicated piping structure for taking hot water in the tank 14.

  Since the operation screw 50 can be turned from the outside of the tank case 52, the opening and closing operation of the second valve body 41 can be easily performed as necessary, and the hot water in the tank 14 can be efficiently and effortlessly taken. Can take water.

  Since one side of the lower end side of the inspection door 53 is in contact with the D-shaped cut portion 45 of the first valve body 40, the first screw body 41 is moved to the valve opening position by turning the operation screw 50. The valve main body 40 can be prevented from being rotated, and the first valve main body 40 can be rotated and moved to the valve opening position to prevent water intake from the hot water intake 49 from being stopped.

  In the hot water storage hot water supply apparatus 1 described above, the discharge pipe 25 and the expansion water discharge pipe 42 are connected to the second valve device 28. However, only the discharge pipe 25 is connected and the expansion water discharge pipe 42 is connected. The road may be closed and used.

  As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 2 ... Heat pump unit, 14 ... Tank, 17 ... Supply pipe, 25 ... Release pipe (pipe), 28 ... Valve apparatus, 39 ... Valve accommodating part, 39a ... Flow path, 40 ... 1st valve main body, 41 ... 2nd valve Main body 42 ... Expansion water discharge pipe 43 ... Cavity part 45 ... D cut part 49 ... Hot water outlet 52 ... Tank case 53 ... Inspection door

Claims (7)

A valve housing portion having a flow path connectable to piping through which fluid flows;
A first valve body movably provided in the valve housing portion between a valve closing position for closing one side and the other side of the flow path and a valve opening position for communicating one side and the other side of the flow path. When,
The first valve body has a hollow portion communicating with one side of the flow path and the outside of the valve housing portion,
A second valve body that prevents or allows fluid to flow through the cavity;
A valve device characterized by comprising: A valve housing part connected to a tank and provided in the middle of a discharge pipe through which hot water stored in the tank flows;
In the valve housing portion, a valve closing position for closing the hot water in the tank to the drainage groove side and a valve opening position for allowing the hot water in the tank to flow to the drainage groove side are provided movably. A first valve body in which a cavity communicating with the discharge pipe is formed;
At least a portion is accommodated in the cavity of the first valve body, and is movable to a valve closing position for preventing hot water from flowing through the cavity and a valve opening position for allowing hot water to flow through the cavity. A second valve body having a hot water intake port for taking hot water flowing through the hollow portion at the tip portion,
A valve device characterized by comprising: A tank case covering the tank is provided;
The valve device according to claim 2, wherein the hot water intake port of the second valve body extends to the outside of the tank case. The first valve body is provided movably between a valve closing position and a valve opening position by rotating the first valve body about a center line.
The second valve body is provided movably between a valve closing position and a valve opening position by rotating the second valve body in the same direction as the first valve body.
A D-shaped cut portion is provided on the outer periphery of the first valve body,
The tank case is provided with an inspection window for the second valve body and an inspection door for opening and closing the inspection window,
The valve device according to claim 3, wherein one side of the inspection door that is closed is in contact with the D-shaped cut portion.   The first valve body is arranged so that an end of the first valve body abuts on an inner peripheral surface of the tank case when the first valve body moves from the valve closing position to the valve opening position. The valve device according to claim 4, wherein:   The valve device according to any one of claims 2 to 5, wherein an expansion water discharge pipe for supplying expansion water from the tank is provided in the valve housing portion. A tank for storing hot water,
A heat pump unit connected to the tank for heating hot water in the tank;
A valve device according to any one of claims 1 to 6;
A supply pipe for supplying hot water in the tank toward the hot water use section;
A hot water storage type hot water supply apparatus comprising:

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