JP5287528B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water heater having a hot water storage tank, and more particularly to a can body protection valve that releases internal pressure to prevent the hot water storage tank from being damaged when the internal pressure of the hot water storage tank abnormally increases.

  Conventionally, this type of hot water storage type hot water heater has been provided with a can body protection valve in a boiling circuit that supplies hot water from the lower part of the hot water storage tank to the upper part of the hot water storage tank through the heat exchange part of the heat source unit. Separately, it is common to separately provide a stop cock for closing the water channel when the heat source unit is repaired and replaced (see, for example, Patent Document 1).

  In the invention described in Patent Document 1, a can body protection valve that is opened when the pressure of the hot water storage tank exceeds a predetermined pressure is provided in the heat pump return pipe. It becomes the structure to provide.

JP 2007-139258 A

  However, in the boiling circuit of the conventional hot water storage type hot water heater, the hot water storage type hot water heater is only provided with a can body protection valve, and a work that adds a stop cock separately when installing the hot water storage type hot water heater. Is necessary, and the number of man-hours for installation work increases.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a hot water storage type hot water heater having improved installation workability that does not require a separate stop cock during installation work.

In order to solve the above-described conventional problems, a hot water storage type water heater of the present invention includes a hot water storage tank for storing hot water, a heat source unit for generating high-temperature water, and a circulation for supplying hot water from the lower part of the hot water storage tank to the heat source unit. A pump, a boiling circuit that returns from the lower part of the hot water storage tank to the upper part of the hot water storage tank via the circulation pump and the heat source unit, a relief valve that drains the expanded water in the hot water storage tank, and the boiling circuit A pressure receiving mechanism that is disposed and releases the pressure in the boiling circuit at an operating pressure higher than that of the relief valve; and a water stop mechanism that is disposed in the boiling circuit and opens and closes the boiling circuit ; The pressure receiving mechanism is disposed inside the water stopping mechanism, and the pressure receiving mechanism receives the pressure of the entire boiling circuit when the water stopping mechanism is in an open state, and the water stopping device There By in the case of the closed state of receiving the pressure of the boiling circuit upstream of the pressure receiving mechanism, will be constructed and the can body protection and water-stop functions in one component, separately installation work Occasionally, a work for installing a water faucet becomes unnecessary, so that workability is improved, and the number of parts can be reduced and the work can be simplified.

  INDUSTRIAL APPLICABILITY The present invention can provide a hot water storage type hot water heater with improved installation workability that does not require a separate water faucet during installation work.

The block diagram of the hot water storage type hot water heater in Embodiment 1 of this invention Sectional (open state) figure of the can body protection member in Embodiment 1 Sectional view (closed state) of the can protecting member in the first embodiment Sectional drawing of the can body protection member in Embodiment 2 of this invention Sectional drawing of the can body protection member in Embodiment 2 Sectional drawing of the can body protection member in Embodiment 2

A hot water storage type water heater of a first invention includes a hot water storage tank for storing hot water, a heat source unit for generating high temperature water, a circulation pump for supplying hot water from the lower part of the hot water storage tank to the heat source unit, and a lower part of the hot water storage tank. A heating circuit that returns to the upper part of the hot water storage tank via the circulation pump and the heat source unit, a relief valve that drains the expanded water in the hot water storage tank, and a heating circuit that is disposed in the boiling circuit, from the relief valve A pressure receiving mechanism for releasing the pressure in the boiling circuit at a high operating pressure; and a water stopping mechanism disposed in the boiling circuit for opening and closing the boiling circuit , wherein the pressure receiving mechanism includes the water stopping mechanism. The pressure receiving mechanism is disposed inside the mechanism, and receives the pressure of the entire boiling circuit when the water stop mechanism is in an open state, and receives the pressure when the water stop mechanism is in a closed state. By receiving the pressure of the boiling circuit upstream of the structure, it will be constructed and the can body protection and water-stop functions in one component, placing the stop cock when additional installation work construction Therefore, workability is improved, the number of parts can be reduced, and construction can be simplified.

Also, during normal operation with the water stop mechanism open, the internal pressure can be released even if the pressure in the boiling circuit rises abnormally, and when the water stop mechanism is closed and the heat source unit is repaired and replaced, Even if the pressure in the raising circuit rises abnormally, the internal pressure can be released.

The hot water storage type water heater according to the second aspect of the invention is characterized in that, in the first aspect of the invention , a water intake mechanism capable of discharging hot water in the hot water storage tank is provided between the water stop mechanism and the pressure receiving mechanism. The hot water in the hot water storage tank can be used as domestic water when there is a water outage in the event of a disaster or emergency, so the usability can be improved.

Hot-water storage type water heater of the third invention is the second invention, in either case the waterproofing mechanism is in the open state or the closed state, by operating the intake mechanism capable of discharging the hot water in the hot water storage tank With this configuration, the hot water in the hot water storage tank can be used as domestic water regardless of whether the boiling circuit is in the open state or the closed state, and thus the convenience can be further improved.

Hot-water storage type water heater of the fourth invention, particularly in the first invention, the water stop mechanism includes a Tomesuiben disposed at the distal end of the can body protection valve body and the can body protection valve body, the The pressure receiving mechanism is
Is arranged inside of the can body protection valve body, wherein the center of the can body protection valve body and the center of the Tomesuiben disposed substantially coaxially, the opening and closing of the circuit boiling the by the water stopping mechanism, the by can body protection valve body is carried out by operating in the axial direction, it can be provided with both functions of waterproofing function and can body protection with a simple structure, reduce the number of parts, and the parts themselves small Can be realized.

The hot water storage type water heater according to a fifth aspect of the invention is particularly the second or third aspect of the invention , wherein the water stop mechanism has a water intake body and a water stop valve disposed at the tip of the water intake body, and the water stop mechanism. between said pressure receiving mechanism is provided with a can body protection valve body having a water intake valve at the tip is disposed substantially coaxially with the center of the center and the intake body of the can body protection valve body, by the intake mechanism the discharge of the hot water in the external in the hot water tank, the can body protection valve body is made through the boiling circuit by operating in the axial direction, opening and closing of the water heating circuit by the water stopping mechanism, the by water intake body is carried out by operating in the axial direction, it can be provided with 3 functions intake function and the water stop function and a can body protection with a simple structure, reduce the number of parts, and the parts themselves small Can be realized

  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)
FIG. 1 is a configuration diagram of a hot water storage type water heater in an embodiment of the present invention. First, the configuration of the hot water storage type water heater of the present embodiment will be described with reference to FIG. In addition, this invention is not limited to the structure of the hot water storage type water heater shown in FIG. 1, For example, even if it is a hot water storage type water heater which has a hot water filling function and a heating function, there is no problem.

  In FIG. 1, the hot water storage type hot water heater of the present embodiment is constituted by a heat source unit 18 that generates high-temperature water and a hot water storage tank unit 17 that has a hot water storage tank inside. In the present embodiment, a heat pump is used for the heat source unit 18, but the heat source unit 18 is not limited to this, and there is no problem even if it is a heat source such as an electric heater.

  Next, the configuration of the heat source unit 18 will be described. The heat source unit 18 is configured by sequentially connecting the water-refrigerant heat exchanger 20, the compressor 40, the evaporator 19, and the expansion valve 41 in an annular manner through a refrigerant pipe, and uses carbon dioxide as the refrigerant. Since the high pressure side exceeds the critical pressure, the water flowing through the water / refrigerant heat exchanger 20 does not condense even if the temperature drops and the temperature decreases, and the water / refrigerant heat exchanger does not condense. A difference is easily formed, high-temperature hot water can be obtained, and heat exchange efficiency can be increased.

  In addition, since carbon dioxide, which is relatively inexpensive and stable, is used as the refrigerant, the product cost can be reduced and the reliability can be improved. In addition, carbon dioxide has an ozone depletion coefficient of zero and a global warming coefficient of about 1/700 of the alternative refrigerant HFC-407C, which is very small.

  Further, in the heat source unit 18, the refrigerant is compressed by the compressor 40, the refrigerant discharged from the compressor 40 radiates heat by the water refrigerant heat exchanger 20, is decompressed by the expansion valve 41, and then is discharged from the air by the evaporator 19. The heat is absorbed and sucked into the compressor 40 again in a gas state. In the capacity control of the compressor 40 and the opening degree control of the expansion valve 41, the temperature of the discharge refrigerant detected by a thermistor (not shown) provided on the discharge side of the compressor 40 is maintained at a preset temperature. To be controlled.

Next, the configuration of the hot water storage tank unit 17 will be described. Inside the hot water storage tank unit 17, the hot water storage tank 11, a water supply pipe 21 for supplying tap water from the lower part of the hot water storage tank 11, and the lower part of the hot water storage tank 11 through the water refrigerant heat exchanger 20 to the upper part of the hot water storage tank 11. A boiling circuit 23 provided with a circulation pump 22 for supplying heated hot water, a can body protection member 12 for releasing the internal pressure and preventing the hot water storage tank 11 from being damaged when the internal pressure of the hot water storage tank 11 rises abnormally; have.

  Further, a hot water discharge pipe 24 for taking out hot water from the upper part of the hot water storage tank 11, a relief valve 13 for draining the expanded water being heated, a conduit 14 for draining the expanded water at the outlet of the relief valve 13, and a predetermined temperature. And a hot water mixing valve 26 for supplying hot water to the faucet 25.

  In the hot water storage type water heater configured as described above, the configuration of the can protection member 112 that is a feature of the present invention will be described. 2 and 3 are cross-sectional views of the can body protecting member of the hot water storage type hot water heater in the embodiment of the present invention.

  As shown in FIG. 2, the can body protecting member 112 according to the present embodiment has a body 100 as a casing, and a first circulating water channel 101 that constitutes a part of a boiling circuit inside the body. And a second circulation water channel 102. The first circulating water channel 101 and the second circulating water channel 102 are connected by an opening 103, and the heating circuit is opened and closed by opening and closing the opening 103 with a water stop mechanism. Further, the opening 103 has a tapered shape with a gradient so as to open from the first circulating water channel 101 toward the second circulating water channel 102.

  In addition, the body 100 is provided with a connection port 104 for connecting a can body protection valve 12 that releases the pressure to the outside when the pressure inside the hot water storage tank 11 abnormally increases. A groove 105 is formed. The can body protection valve 12 includes a vertically long can body protection valve body 106 constituting a casing, and has a pressure receiving port 6 at one end of the can body protection valve body 106 and a drain port 7 at the other end. The path from the pressure receiving port 6 to the drain port 7 forms a substantially cylindrical shape. A valve rubber 4 for sealing the pressure receiving port 6 from the inside is provided, and the valve rubber 4 is pressed and supported by a spring 5 from the side opposite to the pressure receiving port 6.

  A screw portion 3 is provided along the outer periphery of the can body protection valve body 106 and is screwed to the screw groove 105. The can body protection valve body 106 is rotated to screw the screw portion 3 into the screw groove 105. Fix it. In addition, a seal packing 2 is provided at a substantially central portion of the can body protection valve body 106, and a gap formed between the body 100 and the can body protection valve body 106 is reliably filled.

  And in this Embodiment, the water stop valve 1 formed with the elastic member of the O-ring (O-ring) shape is used as a water stop mechanism, and the water stop valve 1 covers the outer periphery of the pressure receiving port 6. It is arranged. And the water stop valve 1 is arrange | positioned so that the center of the water stop valve 1 and the center of the can body protection valve 12 may be located on substantially coaxial.

  The operation and effect of the can body protecting member configured as described above will be described.

  First, when boiling the hot water in the hot water storage tank 11, when the boiling operation is started by the operation unit 31 constituted by a remote control device or the like installed in the kitchen or the like, the circulation pump 22 is driven, and the water in the lower part of the hot water storage tank 11 is driven. Flows into the water-refrigerant heat exchanger 20, where heat is exchanged from the refrigerant to the water, and the water becomes hot water and is supplied to the hot water storage tank 11. At this time, when the internal pressure of the hot water storage tank 11 rises and becomes equal to or higher than the operating pressure of the relief valve 13, the expansion water is drained from the relief valve 13 and drained out of the appliance through the conduit 14.

However, if a situation occurs in which the relief valve 13 is stuck during the boiling operation, the internal pressure of the hot water storage tank 11 continues to rise and the hot water storage tank 11 is damaged. Therefore, to protect the pressure resistance of the hot water storage tank 11, the can body protection member 112 having an operating pressure higher than the operating pressure of the relief valve 13 is provided in the boiling circuit 23, and the internal pressure of the hot water storage tank 11 is increased due to the malfunction of the relief valve 13. If it rises abnormally, it drains out of the appliance from the can body protection member 112 to release the pressure and prevent the hot water storage tank 11 from being damaged.

  Next, the operation principle of the can body protection valve 12 will be described with reference to FIGS. FIG. 2 shows a normal operation state in which the water stop valve 1 is open and the opening 103 is open. FIG. 3 shows the water stop valve 1 in which the can body protection valve 12 is rotated forward via the screw 3. In the closed state, the opening 103 is closed. The closed state as shown in FIG. 3 is used when stopping the intrusion of water into the boiling circuit when the heat source unit 18 is repaired or replaced.

  First, when the internal pressure of the hot water storage tank 11, that is, the internal pressure of the boiling circuit 23 rises abnormally due to the malfunction of the relief valve 13, the pressure received by the valve rubber 4 that has closed the pressure receiving port 6 due to the load of the spring 5 increases. The pressure receiving port 6 is opened, the pressure in the boiling circuit 23 is released, and water is drained from the drain port 7.

  In this embodiment, since the pressure receiving port 6 communicates with the boiling circuit 23 in any case, the valve rubber 4 receives the internal pressure of the boiling circuit 23 and the can body protection valve 12 is operable. It has become. That is, when the opening 103 is closed by the water stop valve 1, the pressure receiving port 6 is arranged toward the first circulation water channel 101 side (the direction in which hot water flows), and the opening 103 is in the open state. In either the closed state or the closed state, an abnormal pressure increase in the hot water storage tank 11 can be detected by the pressure receiving port 6.

  Next, the case of repair and replacement of the heat source unit 18 will be described. In the case of repair and replacement of the heat source unit 18 in FIG. 1, after closing the stop cock provided in the water supply pipe 21, the heat source unit 18 and the boiling circuit 23 are disconnected and replaced. Since a large amount of water leaks and the replacement work cannot be performed, the boiling circuit 23 on the hot water storage tank 11 side needs a water stop function.

  Therefore, in the present invention, as shown in FIG. 3, the water stop valve 1 is provided at the tip of the can body protection valve 12, and the can body protection valve 12 is rotated forward through the screw 3. It is possible to contact the taper of the opening 103 to close the flow path of the opening 103, prevent water leakage from the hot water storage unit 11, and replace the heat source unit 18.

  As described above, the function of the can body protection valve 12 for releasing the pressure in the hot water storage tank 11 and the water stop function for closing the flow path of the heating circuit 23 at the time of repair and replacement of the heat source unit 18 are configured as one component. In addition, it is not necessary to add a new stop cock or to stop the plumbing work for piping work, so that parts can be reduced and the work can be simplified.

  Further, in any case of opening and closing of the boiling circuit 23, the pressure receiving port 6 communicates with the boiling circuit 23 (first circulation water channel 101), so that the valve rubber 4 of the can body protection valve 12 is heated to the boiling circuit. The internal pressure of 23 can be received and the abnormal pressure can be released, and the hot water storage tank 11 can be prevented from being damaged.

  Further, the center of the can body protection valve 12 and the water stop valve 1 are arranged substantially coaxially, and the water stop valve 1 for opening and closing the opening 103 is provided at the tip of the can body protection valve 12. Since the boiling circuit 23 can be opened and closed by the forward and backward movement of the can body protection valve 12, the function of the can body protection valve 12 that releases the pressure in the hot water storage tank 11 and the water channel when the heat source unit 18 is repaired and replaced. While having two functions of a water stop function for closing, it is possible to configure with one part, and it is possible to reduce the number of parts and downsize parts.

(Embodiment 2)
In the second embodiment, the same parts as those in the configuration of the hot water storage type hot water heater and the configuration of the can body protection member shown in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and description thereof is omitted. In the second embodiment, the configuration of the can body protecting member is different from that of the first embodiment.

  Next, the structure of the can body protection member 112 in Embodiment 2 is demonstrated. 4 to 6 are cross-sectional configuration diagrams of the can body protecting member 112 according to the second embodiment. As shown in FIGS. 4 to 6, the can body protection member 112 according to the second embodiment includes a water intake mechanism in addition to the water stop mechanism.

  The can body protection member 112 according to the present embodiment has a body 100 as a housing, and the body 100 includes a first circulation water channel 101 constituting a part of a boiling circuit, and a second circulation. And a water channel 102. The first circulating water channel 101 and the second circulating water channel 102 are connected by an opening 103, and the heating circuit is opened and closed by opening and closing the opening 103 with a water stop mechanism. Further, the opening 103 has a tapered shape with a gradient so as to open from the first circulating water channel 101 toward the second circulating water channel 102.

  Further, the body 100 is provided with a connection port 104 for connecting a water intake mechanism for draining hot water in the hot water storage tank to the outside, and a screw groove 105 is formed in the inner periphery of the connection port 104. In this embodiment, the water intake mechanism is composed of a water intake valve 10 and a water intake valve body 15, and an insertion port 107 for inserting the communication port 9 at one end of the water intake valve body 15 and the can body protection valve 12 at the other end. And have. The path from the communication port 9 to the insertion port 107 forms a substantially cylindrical shape, and a thread groove 109 is formed on the inner peripheral wall of the path from the communication port 9 to the insertion port 107.

  Further, a screw portion 108 screwed with the screw groove 105 is provided along the outer periphery of the intake valve body 15, and the screw portion 108 is screwed and fixed to the screw groove 105 by rotating the intake valve body 15. Further, a seal packing 16 is provided at a substantially central portion of the intake valve body 15 so as to reliably fill a gap formed between the body 100 and the intake valve body 15. Furthermore, the tip inner wall of the intake valve body 15 on the side of the communication port 9 is tapered.

  The can body protection valve 12 includes a vertically long can body protection valve body 106 that constitutes a housing, and has a pressure receiving port 6 at one end of the can body protection valve body 106 and a drain port 7 at the other end. The path from the pressure receiving port 6 to the drain port 7 forms a substantially cylindrical shape. A valve rubber 4 for sealing the pressure receiving port 6 from the inside is provided, and the valve rubber 4 is pressed and supported by a spring 5 from the side opposite to the pressure receiving port 6. In addition, a water intake 8 that communicates the outside and inside of the can body protection valve body 106 is provided on the side wall of the can body protection valve body 106, and the flow of water from the outside passes through the water intake 8, Drained from the drain port 7 to the outside.

  A screw part 3 is provided along the outer periphery of the can body protection valve body 106 and is screwed into the screw groove 109. The can body protection valve body 106 is rotated to screw the screw part 3 into the screw groove 109. Fix it. Further, a seal packing 2 is provided at a substantially central portion of the can body protection valve body 106, and a gap formed between the intake valve body 15 and the can body protection valve body 106 is reliably filled.

  Further, the water stop mechanism of the second embodiment uses a water stop valve 1 formed of an O-ring (O-ring) -shaped elastic member as in the first embodiment, and the water stop valve 1 is in communication. It is arrange | positioned so that the outer periphery of the opening | mouth 9 may be covered.

Further, the water intake valve 10 of the second embodiment is formed of an O-ring (O-ring) -shaped elastic member as with the water stop valve 1, and the water intake valve 10 covers the outer periphery of the pressure receiving port 6. It is arranged. Further, a stopper 18 is provided for preventing the intake valve body 15 from coming off. The water stop valve 1, the water intake valve 10, and the can body protection valve 12 are disposed so that the center of the water stop valve 1, the center of the water intake valve 10, and the center of the can body protection valve 12 are positioned on substantially the same axis. Has been.

  The operation and effect of the can body protecting member configured as described above will be described.

  First, when boiling the hot water in the hot water storage tank 11, when the boiling operation is started by the operation unit 31 constituted by a remote control device or the like installed in the kitchen or the like, the circulation pump 22 is driven, and the water in the lower part of the hot water storage tank 11 is driven. Flows into the water-refrigerant heat exchanger 20, where heat is exchanged from the refrigerant to the water, and the water becomes hot water and is supplied to the hot water storage tank 11. At this time, when the internal pressure of the hot water storage tank 11 rises and becomes equal to or higher than the operating pressure of the relief valve 13, the expansion water is drained from the relief valve 13 and drained out of the appliance through the conduit 14.

  However, if a situation occurs in which the relief valve 13 is stuck during the boiling operation, the internal pressure of the hot water storage tank 11 continues to rise and the hot water storage tank 11 is damaged. Therefore, to protect the pressure resistance of the hot water storage tank 11, the can body protection member 112 having an operating pressure higher than the operating pressure of the relief valve 13 is provided in the boiling circuit 23, and the internal pressure of the hot water storage tank 11 is increased due to the malfunction of the relief valve 13. If it rises abnormally, it drains out of the appliance from the can body protection member 112 to release the pressure and prevent the hot water storage tank 11 from being damaged.

  Next, the operating principle of the can body protection valve 12 will be described with reference to FIGS. 4 shows a view in which the water intake valve 1 is open and the water intake valve 10 is in a closed state, and FIG. 5 shows a view in which the water intake valve 1 is in an open state and the water intake valve 10 is in an open state. These figures show a view in which the water stop valve 1 is closed and the water intake valve 10 is open.

  First, when the internal pressure of the hot water storage tank 11, that is, the internal pressure of the boiling circuit 23 rises abnormally due to the malfunction of the relief valve 13, the pressure received by the valve rubber 4 that has closed the pressure receiving port 6 due to the load of the spring 5 increases. The pressure receiving port 6 is opened, the pressure in the boiling circuit 23 is released, and water is drained from the drain port 7.

  In this embodiment, since the pressure receiving port 6 communicates with the boiling circuit 23 in any case, the valve rubber 4 receives the internal pressure of the boiling circuit 23 and the can body protection valve 12 is operable. It has become. That is, when the opening 103 is closed by the water stop valve 1, the pressure receiving port 6 is arranged toward the first circulation water channel 101 side (the direction in which hot water flows), and the opening 103 is in the open state. In either the closed state or the closed state, an abnormal pressure increase in the hot water storage tank 11 can be detected by the pressure receiving port 6.

  Next, the case of repair and replacement of the heat source unit 18 will be described. In the case of repair and replacement of the heat source unit 18 in FIG. 1, after closing the stop cock provided in the water supply pipe 21, the heat source unit 18 and the boiling circuit 23 are disconnected and replaced. Since a large amount of water leaks and the replacement work cannot be performed, the boiling circuit 23 on the hot water storage tank 11 side needs a water stop function.

  Therefore, in the present invention, as shown in FIG. 3, the water stop valve 1 is opened by providing the water stop valve 1 at the tip of the water intake valve body 15 and rotating the water intake valve body 15 forward through the screw portion 108. The flow path of the opening 103 is closed by abutting against the taper of the section 103, water leakage from the hot water storage unit 11 can be prevented, and the heat source unit 18 can be replaced.

  Next, a water intake function for using hot water in the hot water storage tank 11 as domestic water in an emergency such as when water is cut off will be described.

  4 and 5 show a state in which the water stop valve 1 is opened, and FIG. 6 shows a state in which the water stop valve 1 is closed during repair. In the normal state, as shown in FIG. 4, the intake valve 10 disposed at the tip of the can body protection valve 12 is used in a closed state in contact with the inner wall of the tip of the intake valve body 15. . And since the location which the water intake valve 10 contact | abuts in the front-end | tip inner wall of the water intake valve body 15 becomes a taper shape, the water intake valve body 15 and the water intake valve 10 contact easily.

  Then, when it is desired to take out hot water from the hot water storage tank 11 in an emergency, as shown in FIG. 5, the can body protection valve 12 is rotated and retracted. As a result, the intake valve 10 comes into contact with the inner wall at the front end of the intake valve body 15. From the normal state, the distance between the intake valve 10 and the inner wall of the tip of the intake valve body 15 gradually opens.

  Then, the hot water passing through the boiling circuit 23 from the bottom of the hot water storage tank 11 passes through the opening 103, further through the communication port 9, passes through the water intake 8 from the outer periphery of the can body protection valve body 106, and then enters the drain 7 Water can be taken from. On the other hand, since the position of the intake valve body 15 is fixed by the stopper 18 when the can body protection valve 12 is rotated backward, only the can body protection valve 12 is retracted.

  Further, as shown in FIG. 6, even when the opening 103 is closed by the water stop valve 1, the can body protection valve 12 is rotated and retracted to pass through the communication port 9 and the water intake port 8. Water can be taken from the drain port 7 of the body protection valve body 106.

  Furthermore, the can body protection valve 12, the intake valve 10, and the center of the water stop valve 1 are arranged substantially coaxially, and a water intake valve 10 capable of taking water in the hot water storage tank 11 is provided at the tip of the can body protection valve 12. Since the water stop valve 1 for opening and closing the boiling circuit 23 is provided outside the water intake valve 10, the water intake valve 10 is opened and closed by the forward and backward movement of the can body protection valve 12. The boiling circuit 23 can be opened and closed by the forward and backward movement of the water stop valve 1 provided on the outside. The can body protection function, the water intake function, and the water stop function are provided as a single part with a simple configuration. The number of components can be reduced and the size of the components can be reduced.

  Further, in any case of opening and closing of the boiling circuit 23, the pressure receiving port 6 communicates with the boiling circuit 23 (first circulation water channel 101), so that the valve rubber 4 of the can body protection valve 12 is heated to the boiling circuit. The internal pressure of 23 can be received and the abnormal pressure can be released, and the hot water storage tank 11 can be prevented from being damaged.

  As described above, the hot water storage type hot water supply apparatus according to the present invention includes an integrated heat pump type hot water supply apparatus in which a heat pump cycle and a hot water supply cycle are configured integrally, a separate heat pump type hot water supply apparatus configured separately, and heat exchange for hot water supply. The present invention can be applied to various heat pump water heaters such as a direct hot water heat pump type hot water heater that can discharge hot water heated by a heater as it is, and further to an electric water heater having a boiling pump using an electric heater as a heat source.

DESCRIPTION OF SYMBOLS 1 Water stop valve 2 Seal packing 3 Screw 4 Valve rubber 5 Spring 6 Pressure receiving port 7 Drain port 8 Water intake 9 Communication port 10 Water intake valve 11 Hot water storage tank 12 Can body protection valve 13 Relief valve 15 Water intake valve body 18 Stopper 23 Boiling circuit DESCRIPTION OF SYMBOLS 100 Body 101 1st circulation water channel 102 2nd circulation water channel 103 Opening part 104 Connection port 105 Screw groove 106 Can body protection valve body

Claims (5)

A hot water storage tank for storing hot water,
A heat source unit that generates hot water;
A circulation pump for supplying hot water from the lower part of the hot water storage tank to the heat source unit;
A boiling circuit for returning from the lower part of the hot water storage tank to the upper part of the hot water storage tank via the circulation pump and the heat source unit;
A relief valve for draining the expanded water in the hot water storage tank;
Disposed in the boiling circuit, a pressure receiving mechanism for releasing the pressure in the circuit boiling said at higher operating pressures than the relief valve,
A water stop mechanism disposed in the boiling circuit and configured to open and close the boiling circuit ;
The pressure receiving mechanism is disposed inside the water stop mechanism,
The pressure receiving mechanism receives the pressure of the whole boiling circuit when the water stop mechanism is open, and the boiling circuit upstream of the pressure receiving mechanism when the water stop mechanism is closed. Hot water storage type water heater characterized by receiving the pressure of . The hot water storage type hot water supply apparatus according to claim 1 , wherein a water intake mechanism capable of discharging hot water in the hot water storage tank is provided between the water stop mechanism and the pressure receiving mechanism . In either case the water stopping mechanism is in the open state or the closed state, the hot-water storage type hot water supply apparatus according to claim 2, characterized in that by operating the intake mechanism and discharged configured to be able to hot water in the hot water storage tank . The waterproofing mechanism includes a Tomesuiben disposed at the distal end of the can body protection valve body and the can body protection valve body,
The pressure receiving mechanism is disposed inside the can body protection valve body,
Wherein disposed substantially coaxially with the center of the can body protection valve body and the center of the Tomesuiben,
Opening and closing of the water heating circuit by the water stopping mechanism, the hot-water storage type hot water supply apparatus according to claim 1, wherein the can body protection valve body is carried out by operating in the axial direction. The water stop mechanism has a water intake body and a water stop valve disposed at a tip of the water intake body ,
Between the water stop mechanism and the pressure receiving mechanism is provided with a can body protection valve body having a water intake valve at the tip is disposed substantially coaxially with the center of the center and the intake body of the can body protection valve body,
The discharge of the hot water in the external in the hot water storage tank by intake mechanism, the can body protection valve body is made through the boiling circuit by operating in the axial direction,
Opening and closing of the water heating circuit by the water stopping mechanism, the hot-water storage type hot water supply apparatus according to claim 2 or 3, characterized in that said water intake body is carried out by operating in the axial direction.