JP5974223B2 - Compound valve - Google Patents

Description

  The present invention relates to a composite valve and a lead-out valve, and more particularly to a composite valve and a lead-out valve suitable for a hot water storage type hot water supply apparatus.

  In recent years, hot water storage type hot water supply apparatuses are becoming widespread for reasons such as being environmentally friendly and keeping utility costs relatively low. This hot water storage type hot water supply device, for example, pumps heat in the atmosphere by a heat pump system using carbon dioxide, which is a natural refrigerant, and uses it as heat energy necessary for hot water supply. Configured.

  A water supply pipe is connected to the lower part of the hot water storage tank, and low temperature water is supplied from the water supply. This low-temperature water is sent to the heat pump unit for heat exchange and returned to the upper part of the hot water storage tank as hot water. As a result, in the hot water storage tank, a temperature stratification is formed in which high temperature hot water (high temperature water) is present in the upper portion, intermediate temperature hot water (medium temperature water) is present in the middle portion, and low temperature hot water (low temperature water) is present in the lower portion. A hot water supply pipe is connected to the high temperature layer of the hot water storage tank, and merges with the water supply pipe on the downstream side. A mixing valve is provided at the junction of the hot water supply pipe and the water supply pipe, and the temperature of the hot water flowing downstream is adjusted by adjusting the mixing ratio of the high temperature water flowing through the hot water supply pipe and the low temperature water flowing through the water supply pipe.

  By the way, such a hot water supply device needs to stop water so that hot water in the tank is not sent to the heat pump unit at the time of installation or maintenance of the hot water storage tank. Moreover, when the pressure in the hot water storage tank rises unexpectedly for some reason, the pressure must be released. Furthermore, it is preferable that the hot water in the hot water storage tank be taken out as necessary so that the hot water in the hot water storage tank can be used as domestic water when water is cut off due to a disaster or the like. From such a viewpoint, a composite valve that can function as a water stop valve, a relief valve, and a water intake valve has been proposed between the hot water storage tank and the heat pump unit (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2010-286181 (FIG. 4)

  This composite valve has a plurality of cylindrical valve elements arranged concentrically, and each valve element is relatively displaced by a screw mechanism to allow either the water stop valve or the water intake valve to function. It is configured. In addition, the valve body of the water stop valve constitutes the body of the water intake valve, reducing the number of parts and reducing the size. The inventor believes that by improving the valve structure of such a composite valve, the water stop valve and the intake valve can be further simplified, and can be applied to uses other than the hot water storage type hot water supply apparatus. I came up with it. Furthermore, they came up with the idea that the valve structure can be applied to a single outlet valve such as a water valve.

  The present invention has been made in view of such problems, and one of its purposes is to provide a composite valve that is suitable for a hot water storage type hot water supply apparatus and can be realized simply and at low cost. Another object of the present invention is to provide a derivation valve that can be implemented simply and at low cost.

  In order to solve the above-described problems, a composite valve according to an aspect of the present invention includes a fluid passage that connects an upstream side and a downstream side, a first valve seat that is provided in the fluid passage, and a downstream side of the first valve seat. A body having a connection passage continuously connected to the fluid passage on the side, a valve driver inserted from the distal end side so as to seal the connection passage, and an adjustment mechanism for moving the valve driver forward and backward in the connection passage And comprising. The connection passage is provided such that the diameter of the first sliding portion and the second sliding portion is increased stepwise from the connection portion with the fluid passage toward the opening end portion.

  The valve drive body includes a cylindrical main body provided with a discharge passage therein, a first valve body provided at a front end portion of the main body and capable of opening and closing a fluid passage by being attached to and detached from the first valve seat, and a discharge passage. The second valve seat provided in the main body is inserted into the main body, and is always seated on the second valve seat from the downstream side to close the discharge passage, and the differential pressure before and after becomes larger than the predetermined valve opening differential pressure. A second valve body that sometimes lifts from the second valve seat to open the discharge passage, and is provided on the rear side of the first valve body of the main body, and is inserted into and removed from the first sliding portion, thereby the first main body and the first valve body. A third valve body capable of opening and closing a gap passage formed between the sliding portion, a second valve seat of the main body, a communication hole provided on the rear side of the third valve body and communicating the inside and the outside, and the main body A plug that is provided on the rear side of the communication hole and closes a gap passage formed between the main body and the second sliding portion by being inserted into the second sliding portion. And, including the.

  With the first valve body seated on the first valve seat, the third valve body is inserted through the first sliding portion and the plug body is inserted through the second sliding portion, so that the first valve body is fully opened. The state in which the third valve body is inserted into the first sliding portion is maintained, and the state in which the plug body is inserted into the second sliding portion in a state in which the third valve body is retracted from the first sliding portion. The positional relationship between each valve body and each sliding part is set so as to be maintained.

  According to this aspect, the first valve body, the second valve body, the third valve body, and the plug body are integrally provided on the main body of the valve drive body. Then, a plurality of valves can be opened and closed sequentially by a simple operation of advancing and retracting one valve driver inserted in the connection passage. That is, by displacing the valve drive body to the innermost part of the connection passage, the first valve body can be closed and the fluid passage can be closed. By retreating the valve drive body from that state and adjusting the first valve body to the fully open position, the flow resistance to the working fluid flowing through the fluid passage can be almost eliminated, and the body is made a part of the pipeline. Can do. At this time, when the pressure of the working fluid flowing through the fluid passage exceeds a predetermined reference value, the second valve body opens to open the discharge passage. Thereby, an unexpected pressure increase of the working fluid can be prevented or suppressed. When the valve drive body is further retracted as necessary, the third valve body opens, so that the working fluid can be taken out. At that time, since the closed state of the plug can be maintained, the working fluid can be stably taken out from the rear end opening of the main body.

  Another aspect of the present invention is a derivation valve. The lead-out valve includes a fluid passage connecting the upstream side and the downstream side, a body having a connection passage connected to an intermediate portion of the fluid passage, and a valve inserted from the distal end side so as to seal the connection passage. A drive body, and an adjustment mechanism for moving the valve drive body forward and backward in the connection passage. The connection passage is provided such that the diameter of the first sliding portion and the second sliding portion is increased stepwise from the connection portion with the fluid passage toward the opening end portion.

  The valve drive body includes a bottomed cylindrical main body having a discharge passage provided therein, and a bottom portion forming a part of the fluid passage, and a seal member provided on a side portion of the main body. A valve body that can open and close a gap passage formed between the main body and the first sliding portion by being inserted and removed, and a communication hole that is provided on the side portion on the rear side of the valve body of the main body and communicates the inside and the outside And a gap member formed between the main body and the second sliding portion by being inserted into the second sliding portion. And a closing plug. The positional relationship among the valve body, the plug body, and each sliding portion is set so that the state in which the plug body is inserted into the second sliding portion while the valve body is retracted from the first sliding portion is maintained. Thus, the working fluid flowing through the fluid passage can be led out from the rear end opening of the main body.

  According to this aspect, the lead-out valve can be opened and closed by a simple operation of moving the valve drive body inserted into the connection passage back and forth. That is, the valve-driving valve can be maintained in the closed state by positioning the valve driver behind the connection passage. On the other hand, by retracting the valve drive body from that state, the valve body can be opened to function as a lead-out valve. In particular, since the outlet valve has a so-called shaft seal structure, there is an advantage that it is not necessary to strictly adjust the valve closing position, and the design is facilitated.

  ADVANTAGE OF THE INVENTION According to this invention, it is suitable also for a hot water storage type hot water supply apparatus, and can provide the composite valve and derivation | leading-out valve which can be implement | achieved simply and at low cost.

It is a system figure showing composition of a hot water storage type hot water supply device to which a compound valve of an embodiment is applied. It is sectional drawing showing the structure of a composite valve. It is sectional drawing which illustrates operation | movement of a composite valve. It is sectional drawing which illustrates operation | movement of a composite valve. It is a side view which shows a valve drive body periphery. It is sectional drawing showing the structure of the compound valve concerning a modification. It is sectional drawing showing the structure of the intake valve concerning a modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a system diagram showing a configuration of a hot water storage type hot water supply apparatus to which the composite valve of the embodiment is applied. The hot water supply apparatus of this embodiment includes a hot water storage unit 10 and a heat pump unit 12. The hot water storage unit 10 includes a hot water storage tank 14, piping for circulating or supplying hot water, a control valve for controlling the flow of hot water, a sensor for detecting the temperature and flow rate of the hot water, and the like.

  The low-temperature water supplied from the water supply is supplied to the hot water storage unit 10 through the water supply pipe 16. The water supply pipe 16 branches in the hot water storage unit 10, and a first water supply pipe 18, which is one of them, is connected to the lower part of the hot water storage tank 14. A boiling circulation circuit is formed between the hot water storage tank 14 and the heat pump unit 12. That is, the outlet pipe 20 connected to the lower part of the hot water storage tank 14 is connected to the heat pump unit 12, and the return pipe 22 connected to the heat pump unit 12 is connected to the upper part of the hot water storage tank 14.

  With such a configuration, the hot water storage tank 14 is formed with a temperature stratification in which high temperature water is present in the upper portion, intermediate temperature water is present in the middle portion, and low temperature water is present in the lower portion. The cold / hot water accumulated in the lower part of the hot water storage tank 14 is heat-exchanged by the heat pump unit 12 to be converted into high temperature water and returned to the hot water storage tank 14. The outlet pipe 20 is provided with a pump 24 for promoting circulation of hot water in such a boiling circulation circuit.

  On the other hand, a hot water supply pipe 26 for deriving high temperature water is connected to the upper part of the hot water storage tank 14. The second water supply pipe 28 and the hot water supply pipe 26, which are the other branched from the water supply pipe 16, are connected downstream, and high temperature water and cold / hot water are mixed at the junction. And the hot water which became suitable temperature by the mixing is supplied to a bathtub, a kitchen, or other hot water supply equipment via the piping 30. A control valve unit 32 is provided at a connection point between the hot water supply pipe 26 and the second water supply pipe 28.

  The control valve unit 32 is a composite valve in which a mixing valve 34, a first check valve 36, and a second check valve 38 are integrally assembled in a common body. The mixing valve 34 adjusts the mixing ratio between the high-temperature water supplied through the hot water supply pipe 26 and the low-temperature water supplied through the second water supply pipe 28, and derives hot water at an appropriate temperature into the pipe 30. The piping 30 is provided with a temperature sensor 40 and a flow rate sensor 42 from the upstream side. A control unit (not shown) acquires the temperature of the temperature sensor 40 and controls the opening degree of the mixing valve 34 so as to be a hot water supply temperature set by a user using a remote controller (not shown). On the other hand, the first check valve 36 prevents the hot water in the junction from flowing back into the second water supply pipe 28 when the hot water supply is stopped. The second check valve 38 prevents hot water from the junction from flowing back to the hot water supply pipe 26 when hot water supply is stopped.

  On the other hand, the heat pump unit 12 includes a refrigeration cycle that uses carbon dioxide as a refrigerant. This refrigeration cycle includes a refrigerant circulation circuit including a compressor, a heat exchanger, an expansion valve, and an evaporator. However, since the configuration and operation thereof are known, a detailed description thereof will be omitted. The low-temperature water flowing through the above-described boiling circulation circuit is boiled up into the high-temperature water when passing through the heat exchanger. In the present embodiment, a heat pump is employed as a heat source unit of the hot water supply apparatus, but a heat source such as an electric heater can also be employed.

  In the hot water supply apparatus of the present embodiment, a composite valve 46 having a plurality of valve functions is provided on the upstream side of the pump 24 in the outlet pipe 20. The composite valve 46 is a water stop valve capable of blocking the derivation of hot water from the hot water storage tank 14 to the heat pump unit 12, a relief valve for opening the hot water to the outside when the internal pressure of the hot water storage tank 14 exceeds a reference value, and the hot water storage tank. It is comprised so that it can function as a water intake valve for taking out the 14 hot water manually.

  That is, by making the composite valve 46 function as a water stop valve during the installation and maintenance of the hot water storage tank 14, it is possible to stop the hot water in the tank from being sent to the heat pump unit 12. When the pressure in the hot water storage tank 14 rises unexpectedly due to some factor, the composite valve 46 functions as a relief valve to release the pressure and prevent the hot water storage tank 14 and the like from being damaged. Furthermore, for example, by making the composite valve 46 function as a water valve in the event of a water outage due to a disaster or the like, the hot water in the hot water storage tank 14 can be used as domestic water.

Next, a specific configuration of the composite valve 46 will be described. In the following description, for the sake of convenience, the positional relationship of members may be expressed with reference to the illustrated state.
FIG. 2 is a cross-sectional view illustrating the configuration of the composite valve 46.
The composite valve 46 includes a body 50 obtained by integrally molding a resin material, and the valve drive body 52 is detachably assembled to the body 50. One end of the body 50 is provided with an introduction port 54 for introducing hot water from the upstream side, and the other end is provided with a lead-out port 56 for leading hot water to the downstream side. A valve hole 60 is provided in the middle of the fluid passage 58 connecting the inlet port 54 and the outlet port 56, and a tapered valve seat 62 (corresponding to the "first valve seat") is provided at the downstream opening end thereof. It has been.

  The fluid passage 58 is formed such that the upstream and downstream axes with the valve hole 60 as a boundary are shifted in parallel to each other. A connection passage 64 to which the valve driver 52 is connected is provided on the side of the body 50. The connection passage 64 is connected to the fluid passage 58 on the downstream side of the valve seat 62, and the first sliding portion 66 and the second sliding portion from the connection portion with the fluid passage 58 toward the opening end portion thereof. 68, the 3rd sliding part 70 has comprised the stepped cylindrical shape which diameter-expands in steps. The 1st sliding part 66, the 2nd sliding part 68, and the 3rd sliding part 70 support the valve drive body 52 so that sliding is possible. The third sliding portion 70 has a female screw portion formed on the inner peripheral surface thereof, and functions as an adjustment mechanism that moves the valve driving member 52 forward and backward in cooperation with the male screw portion formed on the valve driving member 52.

  The valve drive body 52 has a main body 80 obtained by integrally molding a resin material. The main body 80 has a stepped cylindrical shape whose diameter is gradually increased from the front end side toward the rear end side. A valve body 82 (corresponding to a “first valve body”) made of an O-ring is fitted to the outer peripheral surface of the distal end portion of the main body 80. The valve body 82 functions as a water stop valve that opens and closes the fluid passage 58 by being attached to and detached from the valve seat 62. In the present embodiment, the valve body 82 is constituted by an O-ring, but may be constituted by another flexible sealing member. An internal passage extending in the axial direction through the main body 80 serves as a discharge passage 84 for discharging hot water flowing through the fluid passage 58 to the outside.

  A small-diameter valve hole 86 is provided in the vicinity of the front end portion of the main body 80, that is, in the upstream portion of the discharge passage 84, and a valve seat 88 (corresponding to the “second valve seat”) is formed by the downstream opening end portion thereof. Is formed. A valve body 90 (corresponding to a “second valve body”) is slidably disposed on the downstream side of the valve hole 86 in the discharge passage 84. The valve body 90 is configured by supporting a flexible member 91 (rubber in this embodiment) by press-fitting or the like at the center of an end surface of a support body 89 made of a resin material, and the support body 89 is slidable on the main body 80. Interpolated. A plurality of communicating grooves 93 parallel to the axis are provided on the outer peripheral surface of the support 89, and a hot water passage is formed between the inner peripheral surface of the main body 80. The valve body 90 functions as a relief valve that opens and closes the discharge passage 84 by being attached to and detached from the valve seat 88.

  A cylindrical spring receiver 92 is fixed on the downstream side of the valve body 90. A spring 94 that biases the valve body 90 in the valve closing direction is interposed between the valve body 90 and the spring receiver 92. That is, the valve body 90 is always seated on the valve seat 88 by the urging force of the spring 94 and closes the discharge passage 84, and when the front-rear differential pressure becomes larger than the preset valve opening differential pressure, that is, the fluid passage. When the pressure of the hot water flowing through 58 becomes higher than the reference pressure set by the spring load of the spring 94, it lifts from the valve seat 88 and opens the discharge passage 84. In the present embodiment, an internal thread portion is formed on the inner peripheral surface of the main body 80, while an external thread portion is formed on the outer peripheral surface of the spring receiver 92, and a dedicated tool is inserted from the rear end opening of the main body 80. Thus, the spring load of the spring 94 can be adjusted by adjusting the screwing amount of the spring receiver 92.

  A valve body 96 made of an O-ring (corresponding to a “third valve body”) is fitted to the outer peripheral surface of the main body 80 on the rear side of the valve body 82, and further, an O-ring is made on the outer peripheral surface of the rear side. A plug 98 is fitted. On the other hand, a communication hole 100 is provided between the valve body 96 and the plug body 98 of the main body 80 to allow communication between the inside and the outside. The communication hole 100 is located behind the valve hole 86. The valve body 96 opens and closes a gap passage formed between the main body 80 and the first sliding portion 66 by being inserted into and removed from the first sliding portion 66. On the other hand, the plug body 98 is inserted into the second sliding portion 68 to close a gap passage formed between the main body 80 and the second sliding portion 68. In a normal use state of the composite valve 46 except when the valve driver 52 is removed from the connection passage 64, the plug 98 is kept inserted through the second sliding portion 68, so that the gap passage is closed. Maintain the state.

  However, since the distance between the valve body 96 and the plug body 98 is set to be smaller than the length of the second sliding portion 68, the valve body 96 moves backward from the first sliding portion 66 toward the second sliding portion 68. Even so, the plug 98 can be maintained in the state of being inserted through the second sliding portion 68. In such a state, the hot water that has passed through the gap passage between the main body 80 and the first sliding portion 66 flows into the main body 80 through the communication hole 100 and is discharged from the rear end opening. That is, the valve body 96 functions as a water intake valve for taking out hot water as needed.

  A flange portion 74 extending outward in the radial direction is provided on the rear side of the plug body 98 of the main body 80, and a male screw portion is formed on the outer peripheral surface thereof. The position of each valve body in the connection passage 64 can be adjusted by screwing the male screw portion into the female screw portion of the third sliding portion 70 and adjusting the screwing amount into the back of the main body 80. A pair of locking portions 102 project rearward from the flange portion 74. The body 50 is provided with a pair of through holes penetrating in the lateral direction, and a U-shaped locking pin 104 is detachably attached (see FIG. 5). And the latching pin 104 latches a pair of latching | locking part 102 or the flange part 74 from back, and the drop-off | omission from the connection channel | path 64 of the valve drive body 52 is prevented.

  FIGS. 3 and 4 are cross-sectional views illustrating the operation of the composite valve 46. FIG. 3 shows a state where the composite valve 46 functions as a water stop valve, and FIG. 4 shows a state where the composite valve 46 functions as a water valve. 2 that has already been described shows a normal state in which the composite valve 46 does not particularly function. FIG. 5 is a side view showing the periphery of the valve driver 52. 5A is a view in the direction of arrow A in FIG. 2, and FIG. 5B is a view in the direction of arrow A in FIG.

  In the normal state, as shown in FIG. 2, the valve body 82 is adjusted to the fully open position so that pressure loss due to the water stop valve does not substantially occur. In the present embodiment, as shown in FIG. 5A, the position where the locking portion 102 of the valve driver 52 is locked by the locking pin 104 is set to the fully open position of the water stop valve. At this time, the valve body 96 is positioned at the first sliding portion 66 and the intake valve is closed, and the plug body 98 is positioned at the second sliding portion 68 and the gap passage is closed. When the pressure in the hot water storage tank 14 rises above a reference value due to some factor during the operation of the hot water supply apparatus, the valve body 90 is detached from the valve seat 88 because the differential pressure across the relief valve exceeds the valve opening differential pressure. The relief valve is opened. As a result, it is possible to avoid a situation in which the hot water storage tank 14 is damaged due to a rapid pressure increase.

  On the other hand, when the composite valve 46 functions as a water stop valve, the valve driver 52 is manually screwed into the connection passage 64 from the state shown in FIG. As a result, as shown in FIG. 3, the valve element 82 is seated on the valve seat 62 and the water stop valve is closed. In this state, the valve body 96 is inserted through the first sliding portion 66 and the intake valve is closed, and the plug body 98 is inserted through the second sliding portion 68 and the gap passage is also closed.

  When the composite valve 46 is to function as a water valve, the valve driver 52 is manually rotated 90 degrees from the state shown in FIG. 2 to release the engaged state between the locking portion 102 and the locking pin 104 and move backward. Let Thereby, as shown in FIG. 4, the valve body 96 is detached from the first sliding portion 66, and the intake valve is opened. In the present embodiment, as shown in FIG. 5B, the position where the flange portion 74 of the valve driver 52 is locked by the locking pin 104 is set to the fully open position of the water valve. When opening the intake valve in this way, the tip of the hose may be connected in advance to the rear end opening of the valve driver 52. In this state, the intake valve is opened, but the state in which the plug 98 is positioned at the second sliding portion 68 and the rear gap passage is closed is maintained. As a result, the hot water flowing from the upstream side is guided to the inside of the main body 80 from the communication hole 100 and discharged from the rear end opening.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the specific embodiments, and various modifications can be made within the scope of the technical idea of the present invention. Nor.

  In the above embodiment, as shown in FIG. 5 and the like, the flange portion 74 or the locking portion 102 provided on the main body 80 is attached to the locking pin 104 on the rear side in order to position and prevent the valve drive body 52 from falling off. A locking structure was adopted. In the modification, a different structure may be adopted. FIG. 6 is a cross-sectional view illustrating a configuration of a composite valve according to a modification. In the figure, components that are substantially the same as those in the above embodiment are given the same reference numerals.

  In the composite valve 246 of this modification, the locking portion 102 is not provided behind the flange portion 74 of the valve driver 252. On the other hand, the third sliding portion 270 of the connection passage 264 is provided with a female screw portion longer than that in the above embodiment. In both the normal state and the water intake state, the displacement in the axial direction is restricted in a state where the male threaded portion of the flange portion 74 is screwed with the female threaded portion of the third sliding portion 270. In addition, a positioning pin 204 and a locking pin 104 for locking the flange portion 74 in the front-rear direction are detachably attached.

  In the normal state shown in FIG. 6, the positioning pin 204 is attached in front of the flange portion 74. Thereby, the valve driver 252 is manually screwed in, and when the flange portion 74 is locked to the positioning pin 204, it can be recognized that the water stop valve is in the fully open position, and the valve driver 252 is placed at that position. Can be fixed. On the other hand, at the time of water intake, the valve driver 252 is rotated while being retracted, and when the flange portion 74 is locked to the locking pin 104, it can be recognized that the water intake valve is in the fully open position, and the valve driver 252 is placed at that position. Can be fixed. In order to make the water stop valve function, the positioning pin 204 may be removed and the valve drive body 252 may be screwed in as far as possible.

  Although not described in the above embodiment, the water stop valve may have a shaft seal structure. That is, in the above embodiment, as shown in FIG. 3, the valve body 82 is attached to and detached from the valve seat 62 in the axial direction to open and close the water stop valve, but the valve body 82 is slid into the valve hole 60. It is good also as a structure which opens and closes a water stop valve by the structure inserted and extracted movably. However, in that case, it is preferable to ensure the length of the valve hole 60 sufficiently.

  In the said embodiment, the composite valve which has the function of a water stop valve, a relief valve, and a water intake valve was demonstrated. In a modification, you may comprise as a control valve specialized in the intake valve (it corresponds to a "derivative valve"). FIG. 7 is a cross-sectional view illustrating a configuration of a water intake valve according to a modification. In the figure, components that are substantially the same as those in the above embodiment are given the same reference numerals.

  The intake valve 346 of this modification has a configuration in which the water stop valve and the relief valve are removed from the composite valve 46 shown in FIG. That is, the main body 380 of the valve driver 352 has a bottomed stepped cylindrical shape, and is inserted into the connection passage 364 with the bottom portion as a tip. A valve body 96 made of an O-ring is fitted on the outer peripheral surface of the front end portion of the main body 380, and a plug body 98 made of an O-ring is fitted on the outer peripheral surface on the rear side. A communication hole 100 is provided between the valve body 96 and the plug body 98 of the main body 80 to allow communication between the inside and the outside. The valve body 96 opens and closes a gap passage formed between the main body 380 and the first sliding portion 66 by being inserted into and removed from the first sliding portion 66. On the other hand, the plug body 98 is inserted into the second sliding portion 68 to close a gap passage formed between the main body 380 and the second sliding portion 68.

  However, since the distance between the valve body 96 and the plug body 98 is set to be smaller than the length of the second sliding portion 68, the valve body 96 moves backward from the first sliding portion 66 toward the second sliding portion 68. Even so, it is possible to maintain the state in which the plug 98 is inserted through the second sliding portion 68. In such a state, the hot water passing through the gap passage between the main body 380 and the first sliding portion 66 flows into the main body 380 through the communication hole 100 and is discharged from the rear end opening.

  A flange portion 374 is provided on the rear side of the plug body 98 of the main body 380, and a pair of locking portions 102 project rearward from the flange portion 374. However, no screw mechanism is provided between the flange portion 374 and the third sliding portion 370. The flange portion 374 is slidably supported by the third sliding portion 370.

  In the normal state, as shown in FIG. 7, the valve closing position of the valve body 96 is set so that the pressure loss due to the valve drive body 352 does not substantially occur. In this modification, as shown in the figure, the position where the locking portion 102 of the valve drive body 352 is locked by the locking pin 104 is set to the valve closing position of the water valve 346. That is, at this time, the valve body 96 is positioned at the first sliding portion 66 and the intake valve 346 is closed, and the stopper 98 is positioned at the second sliding portion 68 and the gap passage is closed.

  On the other hand, when the intake valve 346 is caused to function, the valve driver 352 is manually rotated 90 degrees from the state shown in the figure to release the engaged state between the locking portion 102 and the locking pin 104 and retract. Thereby, the valve body 96 is detached from the first sliding portion 66, and the intake valve 346 is opened. In this modification, the position where the flange portion 374 of the valve drive body 352 is locked by the locking pin 104 is set to the fully open position of the water valve 346. In this state, the intake valve 346 is opened, but the state in which the plug 98 is positioned at the second sliding portion 68 and the rear gap passage is closed is maintained. As a result, the hot water flowing in from the upstream side is guided to the inside of the main body 380 from the communication hole 100 and discharged from the rear end opening. According to this modification, since the intake valve has a so-called shaft seal structure, there is an advantage that it is not necessary to strictly adjust the valve closing position and the design is facilitated.

  In the above embodiment and the modification, the composite valve and the outlet valve of the present invention are configured as a control valve that adjusts the flow of hot water using the working fluid and applied to a hot water storage type hot water supply device. You may apply to the necessary part. In addition, the working fluid other than hot water may be used as a working fluid, and the working fluid may be applied to a fluid circulation device that needs to be shut off, opened, or taken out.

  DESCRIPTION OF SYMBOLS 10 Hot water storage unit, 12 Heat pump unit, 14 Hot water storage tank, 32 Control valve unit, 34 Mixing valve, 36 1st check valve, 38 2nd check valve, 46 Compound valve, 50 Body, 52 Valve drive body, 58 Fluid passage 62 Valve seat, 64 Connection passage, 66 First sliding portion, 68 Second sliding portion, 70 Third sliding portion, 80 Main body, 82 Valve body, 84 Discharge passage, 86 Valve hole, 88 Valve seat, 90 96 valve body, 98 plug body, 100 communication hole, 246 compound valve, 252 valve drive body, 264 connection passage, 346 intake valve, 352 valve drive body, 364 connection passage, 370 third sliding portion, 374 flange portion, 380 body.

Claims (3)

A fluid passage connecting the upstream side and the downstream side; a first valve seat provided in the fluid passage; and a body having a connection passage connected to the fluid passage downstream of the first valve seat;
A valve driver inserted from the distal end side to seal the connection passage;
An adjustment mechanism for advancing and retracting the valve driver in the connection passage;
With
The connection passage is provided such that the diameter of the first sliding portion and the second sliding portion is gradually increased from the connection portion with the fluid passage toward the opening end portion,
The valve driver is
A cylindrical body provided with a discharge passage inside;
A first valve body provided at a distal end of the main body and capable of opening and closing the fluid passage by being attached to and detached from the first valve seat;
A second valve seat provided in the discharge passage;
The second valve seat is inserted into the main body, is always seated on the second valve seat from the downstream side, closes the discharge passage, and the differential pressure before and after becomes larger than a predetermined valve opening differential pressure. A second valve body that lifts from the opening and opens the discharge passage;
A gap passage formed between the main body and the first sliding portion can be opened and closed by being inserted into and removed from the first sliding portion. A third valve body;
A communication hole provided on the rear side of the second valve seat and the third valve body of the main body to communicate the inside and the outside;
A plug body that is provided on the rear side of the communication hole of the main body, and closes a gap passage formed between the main body and the second sliding portion by being inserted into the second sliding portion;
Including
In a state where the first valve body is seated on the first valve seat, the third valve body is inserted into the first sliding portion and the plug body is inserted into the second sliding portion, The state in which the third valve body is inserted into the first sliding portion is maintained in a fully opened state of the one valve body, and the plug body is in a state in which the third valve body is retracted from the first sliding portion. The composite valve is characterized in that the positional relationship between each valve body and each sliding portion is set so that the state of being inserted through the second sliding portion is maintained.   2. The composite valve according to claim 1, wherein the first valve body, the third valve body, and the plug body are made of a flexible seal member fitted to an outer peripheral surface of the main body. A water stop valve provided between the hot water storage tank and the heat source unit in the boiling circulation circuit of the hot water storage hot water supply device, and capable of shutting off the derivation of hot water from the hot water storage tank to the heat source unit, and the internal pressure of the hot water storage tank is a reference value Is configured to function as a relief valve that opens hot water to the outside when the pressure exceeds, and a water intake valve for taking out hot water from the hot water storage tank,
The water stop valve is constituted by the first valve body and the first valve seat,
The relief valve is constituted by the second valve body and the second valve seat,
The composite valve according to claim 1 or 2, wherein the intake valve is configured by the third valve body and the first sliding portion.

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