JP2019167980A - Heat source device - Google Patents

Abstract

To provide a three-way valve capable of properly switching flow of a fluid such as water by switching a full close state and a partial close state by a valve with a simple constitution.SOLUTION: A flow channel branch passage 6 is connected to one end side of a first flow channel 1, a second flow channel 2 is extended from its one end side, a third flow channel 3 is extended from the other end side, and a flow channel opening/closing valve 7 is disposed in the flow channel branch passage 6. The flow channel opening/closing valve 7 is provided with a rod 79, first and second valve elements 81, 82, and a spring body 80, and the rod 79 is moved forward and backward along an extension direction of the flow channel branch passage 6 to switch a non-connection state for blocking liquid circulation among the flow channels by keeping both of the first and second valve elements 81, 82 on a valve close position, a first connection state for circulating the liquid only between the first and second flow channels 1, 2 by keeping only the second valve element 82 on the valve close position, and a second connection state for circulating the liquid only between the first and third flow channels 1, 3 by keeping only the first valve element 81 on the valve close position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a three-way valve having a function of switching a flow path and a heat source device including the three-way valve.

FIG. 11 is a schematic system configuration diagram showing a configuration example of the heat source device proposed by the present applicant. The heat source device 10 has a hot water supply function and a heating function. As shown in the figure, a combustion chamber 13 is provided in the appliance case 12, and a burner device 14 for hot water supply is provided in the combustion chamber 13. And a heating burner device 15 is provided. Fuel gas is supplied to these burner devices 14 and 15 through a gas supply passage 70. In FIG. 11, reference numerals 71 and 171 denote gas electromagnetic valves, and reference numeral 72 denotes a gas proportional valve. A combustion fan 11 for supplying and exhausting the burner device 5 is provided below the burner devices 14 and 15.

In the combustion chamber 13, hot water supply heat exchangers 16 and 17 that are heated by a hot water supply burner device 14 and heating heat exchangers 18 and 19 that are heated by a heating burner device 15 are provided. The hot water supply heat exchanger 16 and the heating heat exchanger 18 are main heat exchangers that recover sensible heat in the exhaust gas (combustion gas), and the hot water supply heat exchanger 17 and the heating heat exchanger 19 are It is a heat exchanger for recovering latent heat that recovers latent heat in exhaust gas. As is well known, the heat exchanger for recovering latent heat and the sensible heat in the exhaust gas are recovered. The heat exchangers 17 and 19 for recovering latent heat are respectively provided upstream of the main heat exchangers 16 and 18 in the flow of the heat medium passing through the heat exchanger.

  A water supply passage 21 is provided on the inlet side of the hot water supply heat exchanger 17, and the water supply passage 21 has a flow rate detection unit 26 that detects the amount of hot water flowing through the water supply passage 21, and detects the amount of hot water. A water amount servo 25 is provided to vary the hot water supply flow rate. In addition, although the incoming water temperature sensor which detects an incoming water temperature may be provided in the water supply channel | path 21, in this example, it has become the structure which detects an incoming water temperature by calculation without providing an incoming water temperature sensor.

  Further, a hot water supply passage 22 is provided on the outlet side of the hot water supply heat exchanger 16, and the front end side of the hot water supply passage 22 is led to an appropriate hot water supply destination. A bypass passage 23 that connects the hot water supply passage 22 and the water supply passage 21 without the hot water exchangers 16 and 17 is provided, and a bypass as a bypass flow valve is provided at a connection portion of the bypass passage 23 with the water supply passage 21. A servo 24 is provided. In the hot water supply passage 22, a heat exchange side temperature detection sensor 27 is provided on the outlet side of the hot water supply heat exchanger 16, and a hot water supply temperature detection sensor 28 is provided on the downstream side of the formation portion of the bypass passage 23.

  The heating heat exchangers 18 and 19 are provided in the liquid circulation passage 5. The liquid circulation passage 5 is provided with a cistern tank 31 and a liquid circulation pump 33 for circulating a liquid heat medium. The heating heat exchangers 18 and 19 have a function of heating the heat medium circulated by driving the liquid circulation pump 33. A part of the cistern tank 31 is open to the atmosphere. The cistern tank 31 is connected to an overflow passage (not shown) of liquid overflowing from the cistern tank 31 due to, for example, volume expansion of the liquid. The tip is led to the outside of the heat source device (such as a drain port). A water replenishment passage 58 is connected to the cistern tank 31 via a water replenishment adjustment valve 59 so that water can be replenished as necessary.

  The liquid circulation passage 5 is provided outside the appliance case 12 and a heating circuit having pipes 34, 36, 40, 41, 42, 43, 45, 46, 47, 143 provided in the appliance case 10. It has conduits 37, 38, 44, 48 for external passages. The pipe line 43 is provided on the outlet side of the heating heat exchanger 18, and the pipe line 43 is provided with a heating high temperature thermistor 62 that detects the temperature of the liquid led out through the heating heat exchanger 18. Yes. On the other hand, a heating low temperature thermistor 61 that detects the temperature of the liquid introduced into the heating heat exchanger 18 is provided at a connection portion between the inlet pipe 34 and the pipe 36 of the heating heat exchanger 18. Yes.

  The heat source device 10 is connected to a bathtub 102 via a recirculation circuit 103 having an outgoing pipe 52 and a return pipe 54, and this recirculation circuit 103 is connected to the liquid via a heat exchanger 104. It is thermally connected to the circulation passage 5. The heat exchanger 104 is a bath water reheating heat exchanger formed by a liquid-liquid heat exchanger between the recirculation circuit 103 and the pipe 46 of the liquid circulation path 5. The reheating circulation path 103 is provided with a bathtub hot water circulation pump 49 that circulates the bathtub hot water, and the heat exchanger 104 is operated by driving the bathtub hot water circulation pump 49 so that the hot water and the liquid circulation path 5 circulate in the reheating circulation path 103. The bath water is heated by heat exchange with the liquid passing through (circulating). Reference numeral 50 denotes a running water sensor.

  The recirculation circuit 103 is provided with a bath temperature sensor 63 for detecting the temperature of the hot water in the bathtub and a temperature sensor 64 for detecting the temperature of the hot water heated through the heat exchanger 104. A water level sensor (not shown) for detecting the water level is provided as appropriate. One end side of the return pipe 54 is connected to the suction port side of the bathtub hot water circulation pump 49, and the other end side of the return pipe 54 is connected to the bathtub 102 through the circulation fitting 106. One end side of the forward pipe 52 is connected to the discharge port side of the bathtub hot water circulation pump 49, and the other end side of the forward pipe 52 is connected to the bathtub 102 via the circulation fitting 105. The circulation fittings 105 and 106 are not necessarily separately installed as shown in the figure, and the forward pipe 52 and the return pipe 54 may be connected to one circulation fitting.

  A pouring water unit 57 is connected to the hot water supply passage 22 via a pipe 107 on the downstream side of the formation portion of the branch passage 23 and the arrangement portion of the hot water temperature detection sensor 28. Is provided with a check valve 56. One end side of the bath pouring introduction passage 55 is connected to the pouring water unit 57, and the other end side of the bath pouring introduction passage 55 is connected to the return pipe 54. The hot water supply heat exchangers 16 and 17 pass through the hot water supply passage 22 and the pipe 105, the pouring water unit 57, the hot water pouring introduction passage 55, and the recirculation circulation passage 103 in order to reach the bathtub 102. A hot water filling water passage for performing water filling and water filling is formed.

  The recirculation circulation passage 103 is provided with three-way valves 8 and 9, a pipe 154 is connected to the three-way valve 9, and a drain drainage passage 68 is connected to the three-way valve 8 through the pipe 108. Yes. Since drain is generated in the latent heat recovery heat exchanger, a drain recovery means (drain receiver) 65 is provided below the heat exchangers 17 and 19, and the drain recovered by the drain recovery means 65 is: After being introduced into the drain neutralizers 66 and 67 through the drain discharge passage 69 and neutralized, the drain outside the heat source device 10 through the drain discharge passage 68 (such as a drain outlet to which the tip of the drain discharge passage 68 is connected) ).

  In the heat source device shown in FIG. 11, the drain that has passed through the drain discharge passage 68 can be introduced into the recirculation circulation passage 103 via the three-way valve 8, and is introduced into the recirculation circulation passage 103. The drained water can be led out into the bathtub 102 or can be introduced into the pipe line 154 through the three-way valve 9 and discharged from the pipe line 154 to the bathroom.

  In the heat source device 10 as shown in FIG. 11, when the operation of the remote control (remote control device) 74 that is signal-connected to the control unit 73 of the heat source device 10 is on, for example, by the user of the heat source device 10 When a hot water tap (not shown) provided at the front end side of 22 is opened, water introduced from the water supply passage 21 is introduced into the hot water supply passage 22 through the hot water supply heat exchangers 17 and 18 to detect the flow rate. When the detected flow rate detected by the means 26 reaches a predetermined hot water supply operating flow rate, a control device (not shown) provided in the heat source device 10 performs combustion control of the hot water supply burner device 14, rotation control of the combustion fan 11, and the like. The hot water at the hot water supply set temperature set in advance in the remote controller 74 is formed and supplied to the hot water supply destination.

  When an automatic switch provided on the remote controller 74 is turned on, hot water having a preset hot water temperature set in the remote controller 74 is formed in the same manner as in the hot water supply operation. The hot water is filled by being guided to the bathtub 102 through the hot water passage. At this time, the three-way valves 8 and 9 perform hot water filling by appropriately setting the passage direction of hot water introduced into the bathtub 102 through the recirculation circulation passage 103.

  Furthermore, in the heat source device 10 shown in FIG. 11, the liquid heat medium (for example, hot water) in the liquid circulation passage 5 is circulated by driving the liquid circulation pump 33 as necessary, and is supplied to the liquid circulation passage 5. It is supplied to one or more of the connected heating devices. The heating medium circulating in the heating device is appropriately heated by the combustion control of the heating burner device 15 and the rotation control of the combustion fan 11 by the control device, and the drive control of the liquid circulation pump 33 is also performed by the control device. Is done by.

  Although an appropriate heating device is connected to the liquid circulation passage 5 as necessary, in FIG. 11, a high temperature heating device 109 such as a bathroom heater and a hot water mat 110 are connected to the liquid circulation passage 5. The hot water mat 110 is connected to the discharge-side passage 36 of the liquid circulation pump 33 through a thermal valve 74 provided in the liquid branching means 35.

  The high temperature heating device 109 is provided with a thermal valve 73. When this thermal valve 73 is opened in response to an operation of turning on the remote control device connected to the high temperature heating device 109, for example, FIG. 11, the heat medium (for example, 80 ° C. hot water) heated by the heating heat exchanger 18 is supplied through the pipes 43, 143, and 48 in order, and the supplied heat medium. Passes through the internal passage of the high-temperature heating device 109 and is introduced into the connecting means 39 through the pipe 44. Thereafter, as shown by an arrow B, it is introduced into the heat exchanger 19 for heating through the conduit 41 and heated, and passes through the cistern 31, the conduit 32, the heating liquid circulation pump 33, and the conduit 34. Return to the heat exchanger 18 for heating.

  In this state, when the reheating operation of the bathtub hot water is performed, the liquid (heat medium) that has passed through the pipe 43 is also switched to the pipe 45 side as indicated by the arrow A ′ by switching the three-way valve 30. While passing through the heat exchanger 104, the bathtub hot water circulation pump 49 is driven to circulate hot water in the recirculation circulation path 103, and between the liquid passing through the conduit 46 and the hot water passing through the recirculation circulation path 103. Heat exchange is performed, and the bath water is rerun until the temperature of the hot water in the bathtub 102 (detected temperature of the bath temperature sensor 63) reaches the bath set temperature.

  On the other hand, when only the reheating operation of the bathtub hot water is performed without performing the heating operation of the high temperature heating device 109, the high temperature heated by the heating heat exchanger 18 is closed because the thermal valve of the high temperature heating device 109 is closed. After a liquid having a set temperature (for example, a liquid at 80 ° C.) is passed through the pipe line 43, it is not passed through the pipe line 143 but is passed through the pipe line 45 as shown by an arrow A ′ in the drawing. In the same manner as described above, this liquid and the hot water in the bathtub are exchanged through the liquid-liquid heat exchanger 104 to perform a reheating operation of the hot water in the bathtub 102.

  In the hot water mat 110, the heat medium heated by the heating heat exchanger 18 is passed through the pipe line 40 as shown by the arrow C by switching the three-way valve 30, and then passed through the cistern 31 to the arrow D in the figure. As shown in FIG. 4, the liquid is discharged from the liquid circulation pump 33 through the pipe 32 and supplied through the pipes 36 and 37 in order.

  The supply of the heat medium to the hot water mat 110 is performed by the thermal valve 74 corresponding to the hot water mat 110 that operates (operates) among the thermal valves 74 provided in the liquid branching means 35 in the instrument case 12. Is performed, for example, by opening the remote control device connected to the hot water mat 110 in response to an operation on operation. In addition, when heating the hot water mat 110 without heating the high-temperature heating device 109 or reheating the bathtub hot water, the hot water mat 110 is supplied, for example, during a hot dash operation performed before the inside of the pipe is heated. The temperature of the liquid is, for example, 80 ° C., and the other temperature is, for example, 60 ° C.

  The passage on the discharge side of the liquid circulation pump 6 is branched and connected to the pipe 34 leading to the heating heat exchanger 18 side in addition to the pipe 36 supplying the heat medium to the hot water mat 110 side as described above. The heat medium that has passed through the pipe line 34 is introduced to the heating heat exchanger 18 side as indicated by an arrow F in the figure. Further, the heat medium (liquid) supplied to the hot water mat 110 as described above passes through the internal passage of the hot water mat 110, is introduced into the connection means 39 through the conduit 44, and passes through the high temperature heating device 109. Similar to the later liquid, it returns to the heating heat exchanger 17 side through the conduit 41.

JP 2006-336701 A

  By the way, the three-way valve 8 needs to be able to switch the connection between the recirculation circulation passage 103 and the conduit 108 as appropriate, and the three-way valve 9 needs to be able to switch the connection between the recirculation circulation passage 103 and the conduit 154 as appropriate. Yes, the three-way valve 30 needs to be able to switch the connection between the pipes 40 and 45 as appropriate. The three-way valve used in applications such as these is required to reliably perform a fully-closed function and a partially-closed function, and in the three-way valves 8 and 9, a recirculation circulation passage through which bath water is passed. Therefore, it is required that these functions have high long-term reliability without being affected by dirt substances and foreign substances in the bath water.

  However, the butterfly valve type and ball valve type three-way valves used in the past have not been able to satisfy such requirements. In other words, the butterfly valve type valve cannot realize the fully closing function, and it is impossible to realize the advanced closing function even with the partially closing function. In addition, the ball valve type valve slides on a spherical surface and has a large area, so it is easily affected by sebum, scale, scale, etc. contained in the bath water. When sandwiched between the seal portions, the seal portions are damaged and the closing function may be deteriorated.

  In addition, since the hair etc. are mixed in bath water, it is preferable that the three-way valves 8 and 9 have a structure in which the hair etc. do not get entangled with the valve or the operating part of the valve.

  The present invention has been made in order to solve the above-mentioned problems. The object of the present invention is to appropriately control the flow of a liquid such as water by having a liquid flow fully closing function and a partially closing function by a valve. The second is to provide a three-way valve that can be switched to the second, and secondly, even if the fluid that switches the flow in the three-way valve is dirty or foreign matter is mixed into the fluid, An object of the present invention is to provide a three-way valve capable of appropriately switching the flow, and to provide a heat source device capable of appropriately switching, for example, a bath water flow path by having such a three-way valve.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, in the three-way valve of the first invention, a flow path branching passage extending in a direction intersecting with the first flow path is connected to one end side of the first flow path for liquid circulation, A second flow path for liquid circulation extends from one end side of the path for branching and a third flow path for liquid circulation extends from the other end side of the flow path for branching. The flow path branching passage is provided with a flow path opening / closing valve, and the flow path opening / closing valve is extended in the extension direction of the flow path branching passage and moved along the extension direction of the flow path branching passage. A rod provided freely, a first valve body provided on one end side of the rod, and a second valve body provided on the other end side of the rod, and the first and second Each of the valve bodies is slidably provided in the extending direction of the rod in a state in which the rod is prevented from coming off, and one end side of the rod is connected to the first valve body. A spring body that is held and supported at the other end side by the second valve body is provided so as to be extendable and contractible in the extending direction of the rod, and the flow path opening and closing valve is configured to connect the rod to the flow path branching path. By moving forward and backward along the extending direction, the first valve body is set as the valve closed position of the first valve body, and the second valve body is set as the valve closed position of the second valve body. A non-connected state in which the liquid flow between the second flow path, the second flow path, and the third flow path is interrupted, and the second valve body as the valve closed position of the second valve body. The liquid is circulated only between the first flow path and the second flow path by moving the valve body in conjunction with the rod in a direction away from the valve closing position of the first valve body. The first connection state, the first valve body as the valve closed position of the first valve body, and the second valve body from the valve closed position of the second valve body The second connection state in which the liquid is allowed to flow only between the first flow path and the third flow path can be switched by moving in conjunction with the rod in a moving direction. It is a means to solve the problem.

  In addition to the configuration of the first invention, the three-way valve of the second invention has the first or second valve on the tip side of at least one of the first valve body and the second valve body. In the corresponding connection state, when the corresponding valve body is separated from the valve closing position of the valve body, the liquid flows only to the connection side of the fluid branching passage with the first flow path, and the flow path on / off valve A flow restricting means for preventing the spring body from flowing is provided.

  Furthermore, in the three-way valve of the third invention, in addition to the configuration of the second invention, the flow restricting means has a notch formed only on the connection side of the fluid branch passage with the first flow path. Thus, the structure is characterized in that a blocking portion for blocking the flow of the liquid is formed in a portion excluding the notch formation region.

  Further, the three-way valve according to a fourth aspect of the present invention is the valve body when the valve body provided with the flow restricting means slides in the extending direction of the rod in addition to the configuration of the second or third aspect of the invention. The valve body orientation maintaining means is provided to prevent the direction of the crossing direction of the rod from changing.

  Furthermore, the three-way valve according to a fifth aspect of the present invention has a shape in which the valve body is reduced in diameter intermittently or continuously toward the distal end side in addition to the configuration of the invention according to any one of the first to fourth aspects. It is characterized by having.

  Further, a three-way valve according to a sixth aspect of the invention includes, in addition to the configuration of any one of the first to fifth aspects, at least one base end side of the first valve body and the second valve body. A cover member is provided to cover the region where the spring body of the flow path on / off valve is disposed when the flow path on / off valve is in the first connection state and the second connection state; It is characterized by.

  Furthermore, the heat source device of the seventh invention has a recirculation circulation passage connected to the bathtub, and the recirculation circulation passage is provided with the three-way valve of any one of the first to sixth inventions. It is characterized by that.

  According to the three-way valve of the present invention, a flow path branching passage extending in a direction intersecting with the first flow path is connected and formed at one end side of the first flow path for liquid circulation. A second flow path for liquid circulation extends from one end side of the path for branching and a third flow path for liquid circulation extends from the other end side of the flow path for branching. However, a flow path opening / closing valve is provided in the flow path branching passage, and the flow path opening / closing valve is configured as follows, and switching of the flow path is appropriately performed by switching the flow path opening / closing valve. It can be carried out.

  That is, the flow path opening / closing valve is provided in a rod that is extended in the extension direction of the flow path branching passage and is movable along the extension direction of the flow path branching passage, and provided on one end side of the rod. A first valve body and a second valve body provided on the other end side of the rod, and the first and second valve bodies are respectively secured to the rod in a state where the rod is not detached. A spring body provided slidably in the extending direction and having one end side supported by the first valve body and the other end side supported by the second valve body is provided on the outer peripheral side of the rod. It is provided in a retractable manner.

  The flow path opening / closing valve moves the rod forward and backward along the extending direction of the flow path branching passage, thereby setting the first valve body to a valve closed position of the first valve body, When the second valve body is set to the valve closed position of the second valve body, both the first valve body and the second valve body are provided with spring bodies supported by the first and second valve bodies. Not connected to the first valve, the second channel, and the third channel, both of which are pressed against each valve closed position by the force and closed tightly to cut off the liquid flow between the first channel, the second channel, and the third channel. The state can be formed into an appropriate state.

  In the three-way valve of the present invention, it is not necessary to make the seal portion slide on a spherical surface unlike the ball valve type valve, and it is not necessary to increase the area of the seal portion. That is, the three-way valve of the present invention can prevent the hair from being entangled with the valve body by forming the valve body into an appropriate shape. For example, the valve body is intermittently directed toward the distal end. It can be set as the structure which has a shape which shrinks continuously, and it can prevent reliably that hair etc. get entangled in a valve body.

  Further, the second valve body is moved to the valve closed position of the second valve body, and the first valve body is moved in conjunction with the rod in a direction away from the valve closed position of the first valve body. Thus, although the liquid can be circulated on the first valve body side, the second valve body side can be closed tightly by the urging force of the spring body in the same manner as described above. The 1st connection state which distribute | circulates a liquid only between 2nd flow paths can be made into an appropriate connection state (partially closed state).

  On the other hand, the first valve body is moved to the valve closed position of the first valve body, and the second valve body is moved in conjunction with the rod in a direction away from the valve closed position of the second valve body. Thus, the second valve body side can allow liquid to flow, and the first valve body side can be closed tightly by the urging force of the spring body in the same manner as described above, so that the first flow path and the third valve body can be closed. The second connection state in which the liquid is allowed to flow only between the flow paths can be an appropriate connection state (partially closed state).

  The three-way valve of the present invention is configured so that these three connection states (the non-connection state, the first connection state, and the second connection state) are arranged along the extending direction of the flow path branching passage. By moving forward and backward, an excellent three-way valve that can be easily switched can be obtained.

  In the three-way valve of the present invention, a corresponding valve body in the first or second corresponding connection state is closed on the distal end side of at least one of the first valve body and the second valve body. Flow restricting means for preventing the liquid from flowing only to the connection side of the fluid branch passage with the first flow path and not to the area where the spring body of the flow path opening / closing valve is disposed when leaving the valve position. In the configuration in which the hair is provided, even if the hair is mixed in the liquid, the hair can be prevented from being entangled with the spring body.

  Further, the flow restricting means is a blockage in which a notch is formed only on the side of the fluid branching passage connected to the first flow path, and the liquid flow is blocked at a portion excluding the notch forming region. By adopting a configuration in which the portion is formed, the flow restricting means can be formed with a simple configuration, and the excellent effects as described above can be achieved.

  Further, in the three-way valve having the structure in which the flow restricting means is provided, the orientation of the valve element in the direction intersecting with the rod of the valve element does not change when the valve element provided with the flow restricting means slides in the extending direction of the rod. In the configuration in which the valve body orientation maintaining means is provided, the valve body corresponding to the first or second corresponding connection state is obtained by preventing the direction of the valve body from intersecting with the rod. When the valve body moves away from the valve closing position, the liquid flows only to the connection side of the fluid branch passage with the first flow path and does not flow to the area where the flow path opening / closing valve spring body is disposed. In addition, the flow of liquid can be regulated more reliably.

  Furthermore, in the three-way valve of the present invention, at least one base end side of the first valve body and the second valve body is in the second connection state when the flow path opening / closing valve is in the first connection state. In a configuration in which a cover member that covers the region where the spring body of the flow path opening / closing valve is provided is provided, the spring body is covered with the cover member by covering the region where the spring body of the flow path opening / closing valve is covered. It can prevent more reliably that the hair etc. get entangled.

  Further, according to the heat source device of the present invention, the excellent three-way valve of the present invention as described above is provided in the recirculation circulation passage connected to the bathtub, so that the liquid flowing in the recirculation circulation passage by the three-way valve (hot water) ) Is appropriately switched, and even if hot water is dirty or foreign matter such as hair is mixed, an excellent heat source device that can operate satisfactorily without being affected by the influence is provided. it can.

It is typical sectional explanatory drawing for demonstrating 1st Example of the three-way valve which concerns on this invention. It is a typical perspective explanatory view for explaining the three-way valve of the first embodiment. It is typical sectional explanatory drawing for demonstrating the example of a state different from FIG. 1 of the three-way valve of 1st Example. It is typical sectional explanatory drawing for demonstrating the flow of the hot water in the state example shown in FIG. 1 in the three-way valve of 1st Example. It is a typical system block diagram for demonstrating the example of the heat-source apparatus to which the three-way valve of 1st Example is applied. It is a typical section explanatory view for explaining the 2nd example of the three-way valve concerning the present invention. It is typical perspective explanatory drawing for demonstrating the three-way valve of 2nd Example. It is typical perspective explanatory drawing for demonstrating the structure of the cover member in the three-way valve of 2nd Example. It is a typical section explanatory view for explaining the 3rd example of the three-way valve concerning the present invention. It is typical perspective explanatory drawing for demonstrating the three-way valve of 3rd Example. It is a typical system block diagram for demonstrating the example of the heat-source apparatus under development.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in the description of the present embodiment, the same reference numerals are given to the same name portions as those described so far, and the duplicate description is omitted or simplified.

  FIG. 1 is a schematic sectional view showing one state diagram of the first embodiment of the three-way valve according to the present invention, and FIG. 2 is a perspective view thereof. FIG. 3 is a schematic cross-sectional view showing a state of the three-way valve of the present embodiment in a state different from that in FIG.

  As shown in these drawings, the three-way valve of the present embodiment has a first flow channel 1 for liquid circulation extended in the vertical direction of the drawing, and one end side of the first flow channel 1 A flow path branching passage 6 extending in a direction intersecting with the first flow path 1 (here, a direction substantially orthogonal to the right and left and right in the drawing) is connected. From the one end side of the flow path branching passage 6, a second flow path 2 for flowing liquid is formed to extend in the vertical direction in the figure, and from the other end side of the flow path branching path 6, a second flow path for liquid flow is formed. The three flow paths 3 are extended and formed in the vertical direction in the figure to form a three-way valve main body. In the example shown in FIGS. 1 to 3, the first flow path 1 is formed by branching a fourth flow path 4 from the side of the first flow path 1.

  A flow path opening / closing valve 7 is provided in the flow path branching path 6, and the flow path opening / closing valve 7 has a rod 79 extended in the extending direction of the flow path branching path 6 (left-right direction in the figure). The rod 79 is movably provided along the extending direction of the flow path branching passage 6. The rod 79 is connected (integrated) to the drive shaft 91 of the stepping motor 90, and moves forward and backward in the extending direction of the flow path branching passage 6 (left and right direction in FIG. 1) as the stepping motor 90 is driven. It is made. 1 and 3, a part of the stepping motor 90 is shown by a side view rather than a sectional view.

  A first valve body 81 is provided on one end side of the rod 79, and a second valve body 82 is provided on the other end side of the rod 79. These first and second valve bodies 81, 82 are provided on the rod 79 so as to be slidable in the extending direction of the rod 79 while being prevented from coming off. Note that the first valve body 81 is engaged with the engaging portion 92 to prevent the rod 79 from coming off. For example, the engaging portion 92 may be formed of a snap ring, an E ring, or the like, or may be formed of another hook-shaped member. Further, the second valve body 82 is prevented from being detached from the rod 79 by a shoulder-shaped stepped portion 93 between the drive shaft 91 of the stepping motor 90 and the rod 79 integrated with the rod 79.

  A spring body 80 is provided on the outer peripheral side of the rod 79, one end side of the spring body 80 is supported by the first valve body 81, and the other end side is supported by the second valve body 82. 79 is provided so as to be extendable in the extending direction. Further, in the present embodiment, the first and second valve bodies 81 and 82 have a shape that decreases substantially continuously toward the distal end side, and the first and second valve bodies 81 and 82 When hot water passes through the region in the vicinity of the distal end, the hair is not entangled with the valve bodies 81 and 82 even if the hair is mixed in the hot water. The first valve body 81 and the second valve body 82 may be formed so as to continuously reduce the diameter toward the distal end side, or may be formed so as to intermittently reduce the diameter. Good.

  The flow path opening / closing valve 7 moves the rod 79 forward and backward along the extending direction of the flow path branching passage 6 to perform the following valve opening / closing operation, and the first, second, and third flow paths. The flow path connection state between 1, 2, and 3 is switched. That is, the flow path opening / closing valve 7 switches between the non-connected state shown in FIG. 3A, the first connected state shown in FIG. 1, and the second connected state shown in FIG. Details are described below.

  For example, as shown in FIG. 3A, when the rod 79 advances and retreats, the first valve body 81 is set to the valve closed position of the first valve body 81, and the second valve body 82 is set to the second valve body 82. By setting the valve body 82 to the valve closed position, the liquid flow between the first flow path 1, the second flow path 2, and the third flow path 3 is cut off and the connection state is cut off. At this time, the spring body 80 is stretched compared to the state of FIG. 1, but is not fully stretched. The first valve body 81 and the second valve body 82 are attached to the respective valve closed positions. It is pressed by power.

  Further, the rod 79 is moved to the left side with respect to the state of FIG. 3A by the forward and backward movement of the rod 79, and the second valve body 82 is moved to the valve of the second valve body 82 as shown in FIG. As the closed position, the first valve body 81 and the second flow path 2 are moved by moving the first valve body 81 in conjunction with the rod 79 in a direction away from the valve closed position of the first valve body 81. The first connection state in which the liquid is circulated only between

  Furthermore, the rod 79 is moved to the right side of the state of FIGS. 1 and 3 (a) by the forward / backward movement of the rod 79, and as shown in FIG. 3 (b), the first valve body 81 is moved to the first valve body 81. As the valve closed position of the valve body 81, the second valve body 82 is moved in conjunction with the rod 79 in a direction away from the valve closed position of the second valve body 82. A second connection state in which the liquid flows only between the third flow path 3 is set.

  In the present embodiment, the first valve body 81 has a liquid branching fluid on the distal end side when the first valve body 81 leaves the closed position of the first valve 81 in the first connected state. Flow restricting means is provided to flow only on the side of the passage 7 connected to the first flow path 1 and not flow into the region where the spring body 80 of the flow path opening / closing valve 7 is disposed. In this embodiment, the flow restricting means has a notch 84 formed only on the connection side of the fluid branching passage 7 with the first flow path 1, and liquid is not applied to the portion excluding the formation region of the notch 84. A closing portion 85 that closes the flow is formed.

  Further, in this embodiment, when the valve body (first valve body) 81 provided with the flow restricting means slides in the extending direction of the rod 79, the direction of the valve body 81 in the direction intersecting with the rod 79 is changed. Valve body orientation maintaining means is provided so as not to change. In this embodiment, the valve body orientation maintaining means has a rail 87 formed on the inner wall of the liquid branch passage 7 and a rail upper moving portion formed on the first valve body 81. Further, on the proximal end side of the first valve body 81, when the flow path opening / closing valve 7 is in the first connection state and in the second connection state, the spring body 80 of the flow path opening / closing valve 7 is provided. A cover member 86 is provided to cover the arrangement area.

  The three-way valve of the present embodiment is configured as described above. When the three-way valve is not connected, the first and second valve bodies 81 and 82 are both springs, as shown in FIG. Since the valve 80 is pressed against the valve closed position by the urging force of the body 80, the first flow path 1, the second flow path 2, and the third flow path 3 are accurately disconnected from each other, and the flow path closed state is reliably ensured. Can keep.

  In the first or second connection state, the first and second valve bodies 81 and 82 are pressed against the valve closed position by the urging force of the spring body 80, so that the first flow path 1 and the third flow path A partially closed state in which the connection with the flow path 3 is broken and only the first flow path 1 and the second flow path 2 are connected, and the first flow path 1 and the second flow path It is possible to appropriately and reliably maintain the partially closed state in which the connection with the first flow path 1 and the third flow path 3 is only connected between the first flow path 1 and the third flow path 3 is disconnected.

  In addition, since the spring body 80 is contracted more in the partially closed state than in the non-connected state, a stronger force is applied to the first and second valve bodies 81 and 82 than in the non-connected state. It will be. Therefore, for example, in the first connection state, when the first valve body 81 is separated from the valve closing position, the liquid passes through the vicinity of the first valve body 81 so that the first valve body 81 is passed. Even when a force from the liquid is applied to the first valve body 81, the first valve body 81 can be prevented from wobbling due to the force. Similarly, in the second connection state, even if a force from the liquid is applied to the second valve body 82 by the liquid passing through the vicinity of the second valve body 82, the second valve body is caused by the force. It is possible to suppress the wobbling 82 very accurately.

  Further, in FIG. 4A, the flow of hot water in the first connection state is schematically shown by arrows, but in the present embodiment, for example, the first valve body 81 is in the first connection state. When the valve body 81 moves away from the valve closing position, the liquid flows only to the connection side of the fluid branch passage with the first flow path 1 and flows into the region where the spring body 80 of the flow path opening / closing valve 7 is disposed. For example, when bath water flows from the second flow path 2 side to the first flow path 1 side, hair or the like is mixed in the hot water. However, the hair or the like can be prevented from being entangled with the spring body 80. FIG. 4 (b) schematically shows the flow of hot water in a very simple manner.

  Further, in the three-way valve of the present embodiment, the spring body 80 is provided on the proximal end side of the first valve body 81 when the flow path opening / closing valve 7 is in the first connection state and in the second connection state. Since the cover member 86 is provided to cover the arrangement area of the flow path opening / closing valve 7, the cover member 86 covers the arrangement area of the spring body 80, so that the spring body 80 is more reliably entangled with hair. Can be prevented.

  FIG. 5 shows an example in which a three-way valve having a flow path opening / closing valve 7 similar to the three-way valve of the present embodiment is applied as the three-way valves 8 and 9 in the heat source device under development shown in FIG. Yes. In the heat source device 10 shown in FIG. 5, since the three-way valves 8 and 9 are provided in the recirculation circulation passage 103, the first flow path 1 and the second flow path 2 are connected to each other. Bath water flows between the first and second flow paths 1 and 2.

  Then, in the three-way valve 8, a flow as indicated by the arrow in FIG. 4A occurs, and the hot water does not flow to the spring body 80 side but flows into the first flow path 1. In the valve 9, a flow in the direction opposite to the arrow in FIG. 4A is generated. In any case, even if hair is mixed in the hot water, the hair is the spring body 80. It is possible to prevent the hair from being entangled with the spring body 80 by covering the region where the spring body 80 is disposed with the cover member 86. The three-way valve shown in FIG. 4 (a) is depicted in a horizontally reversed state with respect to the three-way valve 8 in FIG. 5, and the three-way valve of this embodiment is applied to the three-way valve 9 in FIG. In this case, the fourth flow path 4 is omitted, but the same effect can be obtained by the same operation as the application example as the three-way valve 8.

  Further, when a three-way valve provided with a flow path opening / closing valve 7 similar to the three-way valve of the present embodiment is applied as the three-way valves 8 and 9 as shown in FIG. 5, the closed state shown in FIG. The operation of shifting from the (non-connected state) to the valve-opened state (first connected state) shown in FIG. 4A is performed in a state where the hot water supply unit 57 or the bath hot water circulation pump 49 is stopped or stopped. Thus, it is preferable that the hot water flow in the recirculation circulation passage 103 is temporarily stopped.

  This is because when the connection state switching operation of the three-way valve is performed in a state where there is a flow of hot water in the recirculation circulation passage 103, the three-way valve is changed from the closed state (non-connected state) to the open state (first connected state). ), A high-speed flow (for example, 2 m / sec) is generated in a narrow gap at the start of valve opening in the three-way valve, and in particular, drift is likely to occur in the notch 84 portion. Vibration is not preferable. Therefore, it is effective to stop the flow in the recirculation passage 103 and stop the flow in the flow path in the three-way valve at the time of transition from the closed state to the open state of the three-way valve so that no drift vibration occurs. is there. The flow of hot water in the recirculation circulation passage 103 can be stopped not only in the transition state from the closed state to the open state of the three-way valve but also in the transition state from the open state to the closed state. preferable.

  For this reason, the heat source device is preferably provided with a control configuration that stops at least one of the hot water unit 57 and the bath hot water circulation pump 49 when the connection state of the three-way valve is switched.

  By the way, even if the bathtub hot water circulation pump 49 is stopped, the flow of hot water in the recirculation circulation passage 103 may be difficult to stop due to inertia (the state transition of the three-way valve may be performed before the flow stops). Therefore, bronze that is strong against erosion and corrosion caused by drift in the notch 84, or syndiotactic polystyrene resin (SPS), polyphenylene sulfide (PPS), or polyphenylene ether (PPE) that does not cause erosion / corrosion is applied. Then, it is preferable to form the valve body 81 and the main body side (the pipe wall forming the flow path branching passage 6 and the second flow path 2) facing the valve body 81.

  Furthermore, even if the flow of hot water in the recirculation circulation passage 103 is weakened, the valve bodies 81 and 82 of the flow path opening / closing valve 7 and the main body side (flow path wall) of the flow path on / off valve 7 may repeatedly collide due to drift vibration. In order to prevent the adverse effects due to this collision, the valve bodies 81 and 82 of the flow path opening / closing valve 7 are made of EPDM (rubber), which is a material that absorbs vibration, in a portion 94 that is in contact with the flow path inner wall of the three-way valve body in the closed position. ), Silicon, fluorine rubber or the like.

  Next, a second embodiment of the three-way valve according to the present invention will be described. In the description of the second embodiment, the same reference numerals are assigned to the same name portions as those in the first embodiment, and the duplicate description is omitted or simplified. FIG. 6 is a schematic cross-sectional view showing one state diagram of the three-way valve of the second embodiment, and FIG. 7 is a schematic perspective view thereof.

  The second embodiment is configured in substantially the same way as the first embodiment, and the second embodiment is different from the first embodiment in that the cover member 86 is the base end of the first valve body 81. And a cover member 86a provided on the base end side of the first valve body 81 and a base end side of the second valve body 82, respectively. The cover member 86b is configured to cover the outer peripheral side of the spring body 80 in such a manner that the cover member 86b is merged vertically as shown in FIG.

  The three-way valve of the second embodiment is configured as described above, and the same effect can be achieved by the same operation as that of the first embodiment.

  Next, a third embodiment of the three-way valve according to the present invention will be described. In the description of the third embodiment, parts having the same names as those in the first and second embodiments are denoted by the same reference numerals, and redundant description thereof is omitted or simplified. In FIG. 9, one state diagram of the three-way valve of the third embodiment is shown by a schematic cross-sectional configuration diagram, and an example of hot water flow in that state is schematically shown by arrows. 10 shows a perspective view of the three-way valve of the third embodiment.

  The third embodiment has many components similar to those of the first and second embodiments, but in the third embodiment, the shape of the first valve body 81 is the first and second shapes. The protrusion 97 is provided as a shape different from the shape in the embodiment, and the cover member 86 is not provided.

  That is, in the third embodiment, the flow restricting means and the cover member 86 as provided in the first and second embodiments are not provided, and water in which hair such as bath water is mixed. Although not suitable as a three-way valve for switching the flow of the three-way valve of the third embodiment, the three-way valve of the third embodiment is also similar to the first and second embodiments between the first, second and third flow paths 1, 2, 3. The flow path connection state can be switched. That is, the first, second, and third flow paths 1, 2, and 3 are not connected, or only the first flow path 1 and the second flow path are connected. Or the second connection state in which only the first flow path 1 and the third flow path 3 are connected can be accurately performed as in the first and second embodiments. For example, it can be applied as the three-way valve 30 of FIG.

  Even when the three-way valve of the present invention is provided at an appropriate location in the liquid circulation passage 5, such as when the three-way valve of the third embodiment is applied to the three-way valve 30 of FIG. As in the case where the three-way valve of the example is applied as the three-way valves 8 and 9 in FIG. 5, in the transition state from the closed state to the open state of the three-way valve or in the transition state from the open state to the closed state, three-way It is preferable that a flow of a heat medium (for example, hot water) does not occur in the valve. For this reason, the heat source device is preferably provided with a control configuration that stops the liquid circulation pump 33 (and thereby stops the flow of the liquid circulation passage 5) when the connection state of the three-way valve is switched.

  Further, the three-way valve of the first and second embodiments can also be applied as the three-way valve 30 in FIG. 5, and in that case, the heat source device has a three-way valve connection state switching as described above. It is preferable to provide a control configuration for stopping the liquid circulation pump 33.

  In addition, this invention is not limited to the said Example, A various aspect can be taken in the range which does not deviate from the technical scope of this invention. For example, in the three-way valve of the first embodiment and the second embodiment, the flow restricting means is provided in the first valve body 81. The shape of the flow restricting means is the first in the first and second embodiments. The shape of the valve body 81 is not necessarily the same as that of the valve body 81, but the same effect can be obtained by forming the first valve body 81 by providing the flow regulating means having the same function even in other shapes. .

  Further, in the three-way valve of the first and second embodiments, the flow restricting means is provided in the first valve body 81, but such a flow restricting means may be provided only in the second valve body 82, You may provide in both the 1st and 2nd valve body 81,82. That is, for example, the flow restricting means may be provided in any of the first and second valve bodies 81 and 82 according to the liquid passing through the passage in which the three-way valve is provided, or may not be provided as in the third embodiment. The details such as the shape and size of the first and second valve bodies 81 and 82 are set as appropriate, including how to provide the flow regulating means.

  Further, the cover member 86 is provided on the first valve body 81 in the three-way valve of the first embodiment and the first and second valve bodies 81 and 82 in the three-way valve of the second embodiment. The member 86 can be omitted. That is, if the flow of liquid such as hot water can be restricted by the flow restricting means, foreign matter can be prevented from flowing to the spring body 80 side, so it is often considered that there is no problem even if the cover member 86 is not provided. It is done. However, when a three-way valve is provided in the passage through which bath water flows like the three-way valve of the first and second embodiments, a cover member 86 is provided to prevent hair from getting entangled with the spring body 80 more reliably. Is preferred.

  Further, details such as the shape and size of the spring body 80 and the shape and size of the rod 79 in the flow path opening / closing valve 7 are appropriately set, and the three-way valve of the present invention includes, for example, the first to third embodiments. As in the example, according to the forward / backward movement of the rod 79, the connection of the first, second, and third flow paths 1, 2, and 3 is set to a disconnected state, a first connected state, or a second connected state. It is formed so that it can be in a state.

  Further, in each of the above embodiments, the rod 79 is connected to the drive shaft 91 of the stepping motor 90 and the stepping motor 90 is driven to move the rod 79 forward and backward. However, the configuration for moving the rod 79 is a stepping motor. It is not limited to the motor 90, but is set as appropriate.

  Furthermore, the three-way valve of the present invention is not necessarily provided in the heat source device 10 as shown in FIG. 5 as in the above embodiments, but can be provided in an appropriate heat source device. Moreover, the three-way valve of the present invention can be applied to an appropriate device that requires a liquid flow fully closing function and a partially closing function by a valve, even if it is not a heat source device.

  Further, the heat source device of the present invention is formed by providing, for example, the three-way valve of the present invention having any one of the first to third embodiments in an appropriate passage including the recirculation circulation passage 103, for example. Is.

  Since the three-way valve of the present invention has a simple configuration and has a fully-closed function and a partially-closed function of the liquid flow by the valve, the flow of fluid such as water can be appropriately switched. In particular, in a three-way valve that can appropriately switch the flow of fluid without being affected by, for example, when the fluid is dirty or foreign matter is mixed in the fluid. A three-way valve can be provided in the recirculation circulation passage, which is a passage through which bathtub hot water flows, so that the flow passage can be switched appropriately. Therefore, a three-way valve that is not easily affected by fluid contamination and a heat source device that includes the three-way valve can be applied to, for example, a household heat source device that has a function of reheating bath water.

DESCRIPTION OF SYMBOLS 1 1st flow path 2 2nd flow path 3 3rd flow path 5 Liquid circulation path 6 Flow path branching path 7 Flow path on-off valve 8, 9, 30 Three-way valve 10 Heat source device 79 Rod 80 Spring body 81 First 1 valve body 82 2nd valve body 84 Notch 85 Closure part 86, 86a, 86b Cover member 90 Stepping motor 91 Drive shaft 103 Reheating circulation passage

Claims (7)

  A flow path branching passage extending in a direction intersecting the first flow path is connected to one end side of the first flow path for liquid flow, and the liquid flow from one end side of the flow path branching path. A second flow path for the liquid flow is formed to extend from the other end side of the flow path branching passage, and a third flow path for liquid circulation is formed to extend to the flow path branching path. An on-off valve is provided, the flow path on-off valve is extended in the extending direction of the flow path branching passage and is movably provided along the extending direction of the flow path branching path; A first valve body provided on one end side and a second valve body provided on the other end side of the rod, and the first and second valve bodies are respectively retained on the rod. The rod is slidable in the extending direction of the rod, one end side is supported by the first valve body on the outer peripheral side of the rod, and the other end side is the second valve body. A supported spring body is provided so as to be extendable and contractible in the extending direction of the rod, and the flow path opening / closing valve moves the rod forward and backward along the extending direction of the flow path branching passage. With the first valve body as the valve closed position of the first valve body and the second valve body as the valve closed position of the second valve body, the first flow path, the second flow path, and the second flow path A non-connected state in which the liquid flow to and from the three flow paths is interrupted, and the second valve body as the valve closed position of the second valve body and the first valve body as the valve closed position of the first valve body. A first connection state in which a liquid flows only between the first flow path and the second flow path by moving in conjunction with the rod in a direction away from the position; and the first valve body To the valve closing position of the first valve body, and the second valve body is interlocked with the rod in a direction away from the valve closing position of the second valve body. Three-way valve, characterized in that forms freely switch between a second connection state for circulating the liquid only between the third flow path and the first flow path by causing moved.   When at least one of the first valve body and the second valve body has a corresponding valve body separated from the valve closing position of the valve body in the first or second corresponding connection state. And a flow restricting means for preventing the liquid from flowing only to the side of the fluid branching passage connected to the first flow path and from flowing to the spring body of the flow path opening / closing valve. The three-way valve according to claim 1, wherein the three-way valve is provided.   The flow restricting means has a notch that is formed only on a side of the fluid branch passage that is connected to the first flow path, and has a blocking portion that blocks the flow of liquid at a portion other than the notch forming region. The three-way valve according to claim 2, wherein the three-way valve has a formed configuration.   There is provided valve body orientation maintaining means for preventing the direction of the valve body from intersecting with the rod from changing when the valve body provided with the flow regulating means slides in the extending direction of the rod. The three-way valve according to claim 2 or claim 3, wherein   The three-way valve according to any one of claims 1 to 4, wherein the valve body has a shape that decreases intermittently or continuously toward the distal end side.   The base end side of at least one of the first valve body and the second valve body has the above-mentioned when the flow path opening / closing valve is in the first connection state and the second connection state. The three-way valve according to any one of claims 1 to 5, further comprising a cover member that covers a region where the spring body of the flow path opening / closing valve is disposed.   A heat source device comprising a recirculation circulation passage connected to a bathtub, wherein the recirculation circulation passage is provided with the three-way valve according to any one of claims 1 to 6.

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