JP2010175015A - Mixing valve unit and hot water storage water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mixing valve unit with good assembling workability, which can reduce the quantity of hot water to be supplied to each faucet or a bathtub while reducing piping and connecting parts. <P>SOLUTION: The unit includes an inflow pipe having a first inflow port through which hot water inflows at one end and a second inflow port through which water inflows at the other end, and including a partition wall dividing the inside of the pipe into a first and second branch flow passages; a first outflow pipe having a first outflow port through which mixed hot water passed through an opening of a valve element outflows at one end, and including an actuator installed to the other end, the actuator rotating the opening of the valve element to adjust the mixing ratio of hot water and water, the first outlet pipe being joined to the inflow pipe in an integrated manner so as to communicate with the first branch flow passage of the inflow pipe; and a second outflow pipe having a second outflow port through which mixed hot water passed through the opening of the valve element outflows at one end, and including an actuator installed to the other end, the actuator rotating the opening of the valve element to adjust the mixing ratio of hot water and water, the second outflow pipe being joined to the inflow pipe in an integrated manner so as to communicate with the second branch flow passage of the inflow pipe. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mixing valve unit and a heat pump type hot water storage type water heater provided with the mixing valve unit.

  Conventionally, hot water mixing valves for general faucets, mixing valves for hot water supply for bathtubs, pressure reducing valves, solenoid valves, relief valves and a water heater having a valve unit that consolidates the pipes connecting them are disclosed (for example, Patent Document 1).

JP 2004-11929 A

  According to the above-described conventional technology, the valves constituting the hot water supply circuit are gathered close together. However, in order to connect the hot and cold water mixing valve, a branch flow path is necessary, and the number of parts for pipe connection increases in order to ensure the sealing performance of the connecting portion. Therefore, there has been a problem that the assembly workability is deteriorated and the cost is increased.

  Further, the branch channel has many bent portions, and the flow rate of hot water supplied to each faucet or bathtub is reduced due to the pressure loss generated in the branch channel. Therefore, there is a problem that the time required for hot water filling is long or the flow rate of each faucet cannot be secured sufficiently.

  The present invention has been made in view of the above, and can prevent a decrease in the amount of hot water supplied to each faucet or bathtub, can reduce piping and connecting parts, and has a good assembling workability. It is an object of the present invention to obtain a hot water storage type water heater provided with a unit and the mixing valve unit.

  In order to solve the above-described problems and achieve the object, the present invention has a first inflow port formed into a tubular shape into which hot water flows into one end, and water having a lower temperature than the hot water at the other end. A valve body is fitted with an inflow pipe body having a second inlet for inflow, a partition wall for partitioning the inside of the pipe into first and second branch flow paths, and an opening of the valve body is passed through one end. A first outlet port through which the hot water and the mixed water of the water flow out, and an actuator for adjusting the mixing ratio of the hot water and the water by rotating the opening of the valve body at the other end. A valve body is fitted with a first outflow pipe body that is connected to the first branch flow path of the pipe body and integrally joined so as to intersect the inflow pipe body, and an opening of the valve body is formed at one end. The second outlet has a second outlet through which the hot water and the mixed hot water flowed out, and the opening of the valve body is rotated at the other end to adjust the mixing ratio of the hot water and water. Yueta is mounted, characterized in that it comprises a second outlet pipe body joined together to communicate with the second branch flow path of the inlet tube intersecting the fluid pipe body.

  According to the present invention, there is no need to pipe a branch pipe connecting two hot and cold water mixing valves. In addition, since parts for pipe connection are not necessary, the assembly workability is improved and the cost increase can be suppressed. Furthermore, the pressure loss generated in the branch pipe is reduced, and there is an effect that the flow rate of hot water such as a faucet can be sufficiently secured.

FIG. 1 is a side view showing an embodiment of a mixing valve unit according to the present invention. FIG. 2 is a perspective view showing a valve body of the mixing valve unit of the embodiment. FIG. 3 is a perspective view showing a valve body of the mixing valve unit of the embodiment. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is a system configuration diagram of a hot water storage type hot water heater incorporating the mixing valve unit of the embodiment.

  Embodiments of a mixing valve unit and a hot water storage type water heater according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment FIG. 1 is a side view showing an embodiment of a mixing valve unit according to the present invention, FIG. 2 is a perspective view showing a valve body of the mixing valve unit of the embodiment, and FIG. It is a perspective view which shows the valve body of the mixing valve unit of embodiment, FIG. 4 is sectional drawing which follows the AA line of FIG. 1, FIG. 5 is sectional drawing which follows the BB line of FIG. It is.

  As shown in FIGS. 1 to 5, the mixing valve unit 90 includes one valve body 10, two valve bodies 20, an actuator 30 for rotating the valve body 20 and controlling the valve opening degree. It is equipped with. The valve body 10 and the valve body 20 are made of metal or resin.

  As shown in FIG. 2, the valve body 10 intersects the inflow pipe body 13 having a first inflow port 11 at one end and a second inflow pipe 12 at the other end, and the inflow pipe body 3 ( So that the intermediate portion is integrally joined to one side of the inflow tube 13 near the first inlet 11, the first outlet 14 is provided at one end, and the actuator mounting flange 15 is provided at the other end. The intermediate portion is integrally joined to the first outflow pipe body 16 to which the actuator 30 is mounted and the other side of the inflow pipe body 13 near the second inlet 12, and the second outlet 17 is connected to one end. And a second outflow pipe body 19 having an actuator mounting flange 18 at the other end to which the actuator 30 is mounted. The first outlet pipe 16 and the second outlet 17 are joined to the inlet pipe 13 so as to be parallel to each other, and the first outlet 14 and the second outlet 17 face in opposite directions. Yes.

  At the first inlet 11, the second inlet 12, the first outlet 14, and the second outlet 17, a flange 41 for connecting a pipe is formed. As shown in FIG. 5, a cylindrical valve body 20 is fitted to each of the first outflow pipe body 16 and the second outflow pipe body 19. The valve body 20 has a shaft 21.

  The shaft 21 protrudes outward from the actuator mounting flanges 15 and 18 and engages with an actuator 30 mounted on the actuator mounting flanges 15 and 18. The valve body 20 is rotated in the first outflow pipe body 16 and the second outflow pipe body 19 by the actuator 30.

  A short cylindrical spacer 22 is fitted between the shaft 21 and the shaft holes of the actuator mounting flanges 15 and 18. A packing 23a is mounted between the shaft hole of the spacer 22 and the shaft 21, and a packing 23b is mounted between the outer peripheral portion of the spacer 22 and the shaft holes of the actuator mounting flanges 15 and 18, Water is prevented from entering the actuator 30 side from the outflow pipe body 16 and the second outflow pipe body 19.

  The spacer 22 is prevented from coming off by a lid 25 attached to the end faces of the actuator mounting flanges 15 and 18 by screws 24. A sliding ring 26 is disposed between the axial end surface of the valve body 20 and the inner end surface of the spacer 22, and the flow of the outlet side end surface of the valve body 20 and the first and second outflow pipe bodies 16, 19. A sliding ring 27 is disposed between the inner end surface of the outlet side step portion 28. The sliding rings 26 and 27 are formed of a material having excellent slidability such as Teflon (registered trademark), polyacetal, fluorine resin, and the like, and the valve body 20 is smoothly rotated.

  As shown in FIG. 4, the flow path to the first outflow pipe body 16 and the flow path to the second outflow pipe body 19 are branched into the inner center of the inflow pipe body 13 as independent flow paths. A partition wall 13a is provided. The partition wall 13a divides the inside of the inflow pipe body 13 into a first branch flow path 13b and a second branch flow path 13c in the vicinity of the first and second outflow pipe bodies 16 and 19.

  From the first outlet 14, the fluid flowing in from the first and second inlets 11, 12 is divided by the partition wall 13 a, and is supplied to the first and second branch ports 11 b, 12 b and the valve body 20. It flows out by being mixed at a flow rate ratio according to the opening area formed by the provided opening 20a (see FIG. 3). Further, from the second outlet 17, the fluid flowing in from the first and second inlets 11 and 12 is divided by the partition wall 13 a, and the first and second branch ports 11 c and 12 c and the valve body are separated. The flow is mixed at a flow rate ratio corresponding to the opening area formed by the opening 20a provided in 20 and flows out. As shown in FIG. 4, the end of the partition wall 13a on the branch port side is preferably formed in a streamline shape in order to smooth the flow of fluid flowing into the branch port.

  The first and second outflow pipe bodies 16 and 19 are integrally joined to one side and the other side of the inflow pipe body 13 in a direction orthogonal to the axial direction of the inflow pipe body 13, respectively. The first and second branch channels 13b and 13c communicate with each other. It is preferable that the partition wall 13 a is also integrally joined to the inflow pipe body 13. The lengths of the inflow tube 13 and the partition wall 13a are determined by the component layout and the flow dividing characteristics of the water heater equipped with the mixing valve unit 90.

  The cylindrical valve body 20 is in contact with the inner peripheral surfaces of the first and second outflow pipe bodies 16 and 19 or has a slight gap, and is formed of metal or resin. The side of the valve body 20 faces the first branch ports 11b and 11c and the second branch ports 11b and 12c, and has a maximum width at the center in the circumferential direction as shown in FIG. A substantially elliptical opening 20a having a shape whose width decreases as it approaches the end is provided.

  By the rotation of the valve body 20, the ratio of the channel area formed by the first branch port 11b and the opening 20a and the channel area formed by the second branch port 12b and the opening 20a changes, If the flow rate ratio of the fluid flowing out from each branch port to the first outflow pipe body 16 through the opening 20a changes, and there is a difference in the temperature of the fluid flowing in from the first and second inflow ports 11 and 12, The temperature of the mixed fluid can be changed. Similarly, the temperature of the mixed fluid flowing out to the second outflow pipe body 19 can also be changed.

  The first outflow pipe body 16, the valve body 20 fitted to the first outflow pipe body 16, and the actuator 30 attached to the actuator mounting flange 15 of the first outflow pipe body 16, FIG. The mixing valve 52 for bathtubs to show is comprised. The second outflow pipe body 19, the valve body 20 fitted to the second outflow pipe body 19, and the actuator 30 attached to the actuator mounting flange 18 of the second outflow pipe body 19, The faucet mixing valve 53 shown in FIG.

  According to the mixing valve unit 90 of the embodiment, since the inflow pipe body 13 and the first and second outflow pipe bodies 16 and 19 are integrated, it is necessary to pipe a branch pipe connecting the two mixing valves. In addition, since there is no need to seal the connecting portion of the branch pipe, assembly workability is improved, and a low-cost mixing valve unit can be obtained. Also, the bent part of the branch pipe is reduced, and the flow of hot water supplied to each faucet or bathtub is reduced due to the pressure loss generated in the branch pipe, and the time required for hot water filling is increased or the flow from each faucet. The problem that there is little is solved.

  FIG. 6 is a system configuration diagram of a hot water storage type hot water heater incorporating the mixing valve unit of the embodiment. As shown in FIG. 6, the water from the water source is depressurized to a predetermined pressure by the pressure reducing valve 51 and supplied to the hot water storage tank 63. The water in the hot water storage tank 63 is heated to a high temperature by a heater 64 such as a heat pump and stored in the hot water storage tank 63.

  When a predetermined amount of hot water is supplied to the bathtub 68 from the kitchen remote controller 66 or the bathroom remote controller 67, the bathtub hot water solenoid valve 56 is opened by the controller 70, and the mixing valve unit 90 Water is supplied to the bathtub mixing valve 52 from the branch pipe 54 through the second inlet 12 (see FIG. 2), and from the branch pipe 55 to the hot water storage tank 63 through the first inlet 11 (see FIG. 2). Hot water is supplied. The mixing valve 52 for bathtub adjusts the mixing ratio of high temperature hot water and water so that the outflow hot water temperature becomes the commanded hot water temperature, the first outlet 14 (see FIG. 2), the bathtub hot water solenoid valve 56, and The bathtub 68 is filled with hot water through the bathtub hot water supply flow sensor 62a.

  At this time, the hot water supply temperature sensor 61 a detects the hot water supply temperature to the bathtub 68, the detected value is fed back to the control unit 70, and a mixing ratio adjustment command is sent from the control unit 70 to the bathtub mixing valve 52. When the bathtub hot water supply flow sensor 62a detects that the predetermined amount of hot water is filled, a detection signal is sent to the control unit 70, and the control unit 70 closes the bathtub hot water electromagnetic valve 56 and stops hot water filling.

  When the faucet hot water supply flow sensor (or flow switch) 62b detects that a general faucet 69 such as a kitchen / washroom / bathroom / shower is opened, the faucet mixing valve 53 of the mixing valve unit 90 The mixing ratio of hot water and water is adjusted so that the temperature becomes the commanded hot water temperature, and the general faucet 69 is passed through the second outlet 17 (see FIG. 2) and the faucet hot water supply flow sensor (or flow switch) 62b. Supply mixed hot water.

  At this time, the faucet hot water temperature sensor 61b detects the hot water temperature to the general faucet 69, the detected value is fed back to the control unit 70, and a mixing ratio adjustment command is sent from the control unit 70 to the faucet mixing valve 52. The general faucet 69 can supply low temperature hot water by mixing the supplied mixed hot water and water supplied from a water source.

  A relief valve 57 is connected to a pipe line connecting the hot water storage tank 63 and the mixing valve unit 90, and the steam or hot water in the hot water storage tank 63 expanded by heating by the heater 64 is discharged out of the system. Check valves 58 and 59 are connected between the branch pipes 54 and 55 and the mixing valve unit 90 to prevent back flow of fluid from the mixing valve unit 90 to the branch pipes 54 and 55. The check valves 58 and 59 may be incorporated in the inflow pipe 13 near the first and second inlets 11 and 12 (see FIG. 2) and integrated with the mixing valve unit 90.

  In the hot water storage type hot water supply apparatus of the embodiment, not only the valves constituting the hot water supply circuit of the hot water storage type hot water supply apparatus are integrated, but as shown in FIG. 6, the two mixing valves 52 and 53 and the peripheral piping are integrated. Therefore, the piping length between the valves constituting the hot water supply circuit of the hot water storage type hot water heater can be shortened. In the hot water storage type hot water heater of the embodiment, in particular, pressure loss generated in the pipe between the pressure reducing valve 51 and the mixing valve unit 90 can be reduced, and a larger flow rate can be flowed. Therefore, a hot water storage type hot water heater in which the flow rate of hot water supplied to each faucet 69 or bathtub 68 does not decrease is obtained.

  As described above, the mixing valve unit according to the present invention is useful as a mixing valve for a hot water storage type hot water supply device.

DESCRIPTION OF SYMBOLS 10 Valve body 11 1st inflow port 11b, 11c 1st branch port 12 2nd inflow port 12b, 12c 2nd branch port 13 Inflow tube 13a Partition wall 13b 1st branch flow path 13c 2nd branch Flow path 14 First outlet 15 Actuator mounting flange 16 First outlet pipe 17 Second outlet 18 Actuator mounting flange 19 Second outlet pipe 20 Valve body 20a Opening 21 Shaft 22 Spacers 23a, 23b Packing 24 Screw 25 Lid 26, 27 Sliding ring 28 Step part 30 Actuator 41 Flange 51 Pressure reducing valve 52 Bath mixing valve 53 Faucet mixing valve 54, 55 Branch pipe 56 Bath hot water solenoid valve 57 Relief valve 58, 59 Check valve 61a Bath Hot water temperature sensor 61b Faucet hot water temperature sensor 62a Bath hot water flow sensor 62b Faucet hot water flow sensor ( Flow switch)
63 Hot water storage tank 64 Heater 66 Kitchen remote controller 67 Bathroom remote controller 68 Bathtub 69 General faucet (faucet)
70 Control unit 90 Mixing valve unit

Claims (5)

The tube has a first inlet through which hot water flows in at one end, and a second inlet through which water having a temperature lower than that of the hot water flows into the other end. An inflow pipe having a partition wall that partitions the two branch flow paths;
The valve body is fitted, and has a first outflow port through which the hot water and mixed water of water passing through the opening of the valve body flows out at one end, and the opening of the valve body is rotated at the other end An actuator for adjusting the mixing ratio of hot water and water, and a first outflow pipe which is connected to the first branch flow path of the inflow pipe and is integrally joined so as to intersect with the inflow pipe; ,
The valve body is fitted, and one end has a second outlet from which the hot water and the mixed water of water passing through the opening of the valve body flows out, and the other end of the valve body is rotated to rotate the valve body. An actuator for adjusting the mixing ratio of hot water and water, and a second outflow pipe body that is connected to the second branch flow path of the inflow pipe body and is integrally joined so as to intersect the inflow pipe body; ,
A mixing valve unit comprising:   The mixing valve unit according to claim 1, wherein the first outlet and the second outlet face in opposite directions.   The mixing valve unit according to claim 1 or 2, wherein the valve body including the inflow pipe body, the first outflow pipe body, and the second outflow pipe body is a resin molded product.   4. The check valve according to claim 1, wherein a check valve that prevents backflow of fluid to the outside is incorporated in an inflow pipe in the vicinity of the first and second inflow ports. The mixing valve unit.   A mixing valve unit according to any one of claims 1 to 4, wherein hot water is supplied from a hot water storage tank to the first inlet of the mixing valve unit, and water from a water source is supplied to the second inlet. A hot water storage type water heater characterized by being configured to supply.

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