JP5961815B2 - Water heater - Google Patents

Description

  The present invention relates to a hot water supply apparatus provided with a mixing valve.

  Conventionally, this type of hot water supply apparatus is generally as described below.

  As shown in FIG. 7, this hot water supply apparatus includes a hot water storage tank 1 and a heat pump heat source 2, and water supplied from the water supply source passes through the water supply pipe 3, and the lower part of the hot water storage tank 1 and the hot water supply mixing valve 4. The water branched from the bath mixing valve 5 and entering from the lower part of the hot water tank 1 is stored in the hot water tank 1.

  The lower part of the hot water tank 1 and the heat pump heat source 2 are connected to each other by a heat pump outgoing pipe 7 via a boiling pump 6. A compressor 8 is built in the heat pump heat source 2, the hot water entering the heat pump heat source 2 is subjected to heat exchange, the temperature is raised, the heat pump is returned to the upper part of the hot water tank 1 through the heat pump return pipe 9. Yes.

  Hot water stored in the upper part of the hot water tank 1 and water branched from the water supply pipe 3 are mixed by the bath mixing valve 5, passed through the pouring valve 10 and the flow rate adjusting valve 12, and discharged from the bath adapter 11 to the bathtub 13. .

  By opening and closing the pouring valve 10, the hot water to the bathtub 13 can be opened and closed, and the flow rate of the hot water to the bathtub 13 can be controlled by the flow rate adjusting valve 12.

  The hot water stored in the upper part of the hot water tank 1 and the water branched from the water supply pipe 3 are mixed by the hot water supply mixing valve 4 and discharged from the faucet 15 through the hot water flow rate sensor 15. The mixing ratio of the hot water mixing valve 4 and the bath mixing valve 5 can be controlled by the control device 16 (see, for example, Patent Document 1).

  Next, a conventional bath mixing valve is shown in FIG. As shown in FIG. 8, the drive shaft of the valve body 18 is installed so as to protrude from a hole formed in the body 17, and two sliding O-rings 19 are incorporated in the drive shaft of the valve body 18. The hot water in the body 17 is sealed so as not to flow out.

  The movement of the valve body 18 in the vertical direction is restricted by the socket 20. The socket 20 and the body 17 are sealed with a fixed O-ring 21. The body 17 has a water side opening 22 and a hot water side opening 23, and hot water flowing in from the water 17 is mixed through the valve body opening 24 and then discharged from the hot water outlet 25.

  A motor unit 26 is installed on the body 17, and a pinion 28 is connected to the rotating shaft of the motor 27 in the motor unit 26. The torque of the motor 27 is transmitted to the output gear 29 and connected to the output gear 29. The valve body 18 can be rotated.

  A magnet 30 is embedded in the output gear 29, and the rotation position of the output gear can be detected by the Hall IC 31. The signal of the Hall IC 31 and the power of the motor 27 pass through the lead wire 32 and are connected to the terminal 33. The terminal 33 is connected to the control device 16 of FIG.

JP 2009-115395 A

  However, in the configuration of the conventional hot water supply device, when mixing hot water and water from the hot water storage tank and adjusting the hot water flow rate to supply to the bathtub, mixing to mix hot water and water from the hot water storage tank Since a valve, a flow rate adjusting valve for adjusting the discharged water flow rate of the mixed hot water, and two valves are required, there is a problem that the cost is increased.

  An object of the present invention is to solve the above-mentioned conventional problems, and to provide a hot water supply device provided with a mixing valve having both functions of mixing hot water and water from a hot water storage tank and adjusting a hot water flow rate. To do.

In order to solve the conventional problems, a hot water supply apparatus of the present invention is provided with a hot water storage tank for storing high-temperature hot water, a mixing valve for mixing water and hot water from the hot water storage tank, and a downstream side of the mixing valve. The mixing valve has a plurality of openings in the valve body, and when the valve body is driven from the water side, a flow rate variable region in which the flow rate of water only varies is constant. After the section exists, there is a mixed section where hot water and water are mixed , and in the flow rate variable section, there is a section where the flow area formed by the plurality of openings is substantially constant, The opening / closing means is configured to open and close in a section where the flow path area is substantially constant .

  As a result, by mixing the hot water from the hot water storage tank and adjusting the discharge flow rate with a single mixing valve, it becomes a compact hot water supply device, power consumption is reduced, and control is performed to reduce the number of drive devices. The system can also be simplified.

  ADVANTAGE OF THE INVENTION According to this invention, the hot water supply apparatus provided with the mixing valve which has both the function of mixing of the hot water and water from a hot water storage tank, and adjustment of a hot water flow rate can be provided.

Configuration diagram of hot water supply apparatus according to Embodiment 1 of the present invention Configuration diagram of the bath mixing valve The figure which shows the relationship between the rotation angle of the valve body of the bath mixing valve, the mixing ratio, and the flow path area (opening area) The figure which shows the relationship between the rotation angle of the valve body of the conventional bath mixing valve, the mixing ratio, and the relationship of a flow-path area (opening area). Configuration diagram of other bath mixing valves The figure which shows the relationship between the rotation angle of the valve body of the other bath mixing valve, the mixing ratio, and the flow path area (opening area) Configuration diagram of conventional hot water supply equipment Configuration of conventional bath mixing valve

1st invention is provided with the hot water storage tank which stores high temperature hot water, the mixing valve which mixes water and the hot water from the said hot water storage tank, the opening-closing means arrange | positioned in the downstream of the said mixing valve, and a control apparatus. The mixing valve has a plurality of openings in the valve body, and when the valve body is driven from the water side, there is a flow variable region in which the flow rate of water only varies, and then hot water and water are mixed. In the section in which the mixing area exists and the flow area formed by the plurality of openings is substantially constant in the variable flow area, and the flow area is substantially constant. The hot water supply apparatus is characterized in that the opening / closing means is opened and closed .

  As a result, by mixing the hot water from the hot water storage tank and adjusting the discharge flow rate with a single mixing valve, it becomes a compact hot water supply device, power consumption is reduced, and control is performed to reduce the number of drive devices. The system can also be simplified.

Further, by providing the flow rate variable region at a location where the valve body is further driven in the same direction from the water side fully open region, hot water can be prevented from being discharged, and the usability of the hot water supply apparatus can be improved .

Thereby, the pouring flow rate can be accurately regulated, and the determination of the flow sensor for detecting the pouring flow rate can be performed correctly .

The front Symbol provided an area flow area part becomes constant flow rate variable regions, by the flow area to open and close the closing means in the region to be a constant, stable opening and closing to the opening and closing means It becomes possible to prevent water hammer.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a configuration diagram of a hot water supply apparatus according to Embodiment 1 of the present invention.

  As shown in FIG. 1, the hot water supply apparatus includes a hot water tank 1 and a heat pump heat source 2, and water supplied from the water source passes through the water supply pipe 3, the lower part of the hot water tank 1, the hot water mixing valve 4, and the bath. The water branched from the mixing valve 5 and introduced from the lower part of the hot water tank 1 is stored in the hot water tank 1.

  The lower part of the hot water tank 1 and the heat pump heat source 2 are connected to each other by a heat pump outgoing pipe 7 via a boiling pump 6.

  A compressor 8 is installed in the heat pump heat source 2, and the temperature of the hot water entering the heat pump heat source 2 is increased by exchanging heat to return to the upper part of the hot water tank 1 through the heat pump return pipe 9. ing.

  The hot water stored in the upper part of the hot water tank 1 and the water branched from the water supply pipe 3 are mixed by the bath mixing valve 5, passed through the pouring valve 10 and the flow rate sensor 34, and discharged from the bath adapter 11 to the bathtub 13. By opening and closing the pouring valve 10, the hot water to the bathtub 13 can be opened and closed.

  The hot water stored in the upper part of the hot water tank 1 and the water branched from the water supply pipe 3 are mixed by the hot water supply mixing valve 4 and discharged from the faucet 15 through the hot water flow rate sensor 17. The mixing ratio of the hot water mixing valve 4 and the bath mixing valve 5 can be controlled by the control device 16.

  Next, the block diagram of the bath mixing valve used in the hot water supply apparatus according to Embodiment 1 of the present invention is shown in FIG.

  As shown in FIG. 2, it is installed so that the drive shaft of the valve body 18 protrudes from a hole formed in the body 17, and two sliding O-rings 19 are incorporated in the drive shaft of the valve body 18. The hot water in the body 17 is sealed so as not to flow out.

  The movement of the valve body 18 in the vertical direction is restricted by the socket 20. The socket 20 and the body 17 are sealed with a fixed O-ring 21. The body 17 has a water-side opening 22 and a hot-water side opening 23, and the hot water flowing in from the body 17 is mixed through the valve-body water-side opening 35 and the valve-body water-side opening 36, and then discharged. It is discharged from the gate 25.

  A motor unit 26 is installed on the body 17, and a pinion 28 is connected when the rotation axis of the motor 27 in the motor unit 26 is connected. The torque of the motor 27 is transmitted to the output gear 29 and connected to the output gear 29. The valve body 18 can be rotationally driven.

  A magnet 30 is embedded in the output gear 29, and the rotation position of the output gear can be detected by the Hall IC 31. The signal of the Hall IC 31 and the power of the motor 27 pass through the lead wire 32 and are connected to the terminal 33. The terminal 33 is connected to the control device 16 of FIG.

  Next, the operation and action will be described. When the pouring valve 10 is opened, the hot water mixed by the bath mixing valve 5 can be poured out into the bathtub 13, and when the pouring valve 10 is closed, the pouring out into the bathtub 13 can be shut off.

Here, when the pouring valve 10 is opened and closed, a rapid pressure change occurs, so that a water hammer is generated and the pipes vibrate and a loud noise is generated. At the same time, the pipes are loosened and used for many years. Then, problems such as water leakage may occur.

  Therefore, in the conventional technique, the flow rate adjusting valve 12 is arranged downstream of the pouring valve 10 and the flow rate is reduced when the pouring valve 10 is opened and closed, thereby preventing the water hammer from being generated. The valve body of the bath mixing valve 5 is provided with two or more openings, and has two regions, a mixing region and a flow rate variable region, and two types of bath mixing valve 5 and flow rate adjustment valve 12 of the prior art. The valve functions as a single valve.

  In FIG. 3, the relationship between the rotation angle of the valve body of the bath mixing valve 5 of Embodiment 1 of this invention, a mixing ratio, and a flow-path area is shown.

  By rotating the valve body 18 of the bath mixing valve 5, the mixing ratio remains 0% (only water), and the flow is an overlap area of the valve body water side opening 36 and the water side opening 22 of the body 17. The road area gradually increases, but the mixing ratio remains 0% (water only).

  When the valve body 18 is further rotated, the flow rate of water becomes maximum (water side full open) while the mixing ratio remains 0% (water only).

  Further, when the valve body 18 is rotated, the valve body hot water side opening 35 and the hot water side opening 23 of the body 17 overlap, the hot water from the hot water tank 1 is mixed, and the mixing ratio is increased. It will increase.

  When the valve body 18 is further rotated, the overlap between the valve body water side opening 36 and the water side opening 22 of the body 17 disappears, and the valve body hot water side opening 35 and the hot water side opening 23 of the body 17 are not overlapped. The overlap area is maximized, and the mixing ratio is 100% (fully opened on the hot water side). The flow path area from the water side full open to the hot water side full open is substantially constant.

  FIG. 4 shows the relationship between the rotation angle of the valve body of the prior art bath mixing valve, the mixing ratio, and the flow path area.

  As can be seen from FIG. 4, the mixing ratio can be controlled from 0% (water side fully open) to 100% (hot water side fully open) in the entire drive region of the valve body, but the flow passage area (outflow rate) is constant.

  Therefore, when controlling the outgoing hot water flow rate, a flow rate control mechanism different from the bath mixing valve is required, such as the flow rate adjusting valve 12, but if the bath mixing valve 5 of the present invention is used, the flow rate adjustment is performed as described above. Since the mixing of water and hot water can be controlled with a single valve, there is no need for a separate flow rate control mechanism like the conventional technology, and it is possible to save power and simplify the control system, which is compact and inexpensive. It is possible to provide a water heater.

  As can be seen from the relationship between the rotation angle of the valve body of the bath mixing valve 5 in FIG. 3, the mixing ratio, and the flow path area, the flow rate variable region is moved from the water side fully open region to the location where the valve body is further driven in the same direction. Provided.

  If the flow rate variable region is provided at a location further driven in the same direction from the hot water side full open region, hot water at the upper part of the hot water storage tank 1 may be discharged if it is controlled in the variable flow rate region.

  For this reason, the bath mixing valve 5 of the present invention is provided with a flow rate variable region at a location where the valve body 18 is further driven in the same direction from the water side full open region, so that hot water is not discharged. Usability can be improved and controlled.

  FIG. 5 shows a configuration diagram of another bath mixing valve 5. As shown in FIG. 5, a flow rate regulating hole 37 is disposed between the valve body hot water side opening 35 and the valve body water side opening 36.

  The operation and action will be described. The distance between the flow restriction hole 37 and the valve body hot water side opening 35 and the valve body water side opening 36 is larger than the opening width of the water side opening 22 and the hot water side opening 23. As a result, even if the valve body 18 is rotated, a region where a constant flow path area is always open can be secured.

  FIG. 6 shows the relationship between the rotation angle of the valve body of the bath mixing valve 5, the mixing ratio, and the flow path area. As can be seen from FIG. 6, there is a region 38 with a constant flow path area, and when the valve body rotation angle is increased beyond that region, the flow path area (bath flow rate) increases, and when the valve body rotation angle is further increased. It becomes a mixed area.

  By providing a region in which the flow passage area is constant in this way, the amount of discharged hot water is known in advance, so that the flow rate sensor 34 is operating normally in light of the detection data of the flow rate sensor 34 in FIG. It becomes possible to judge.

  On the other hand, when the region where the flow path area is constant is not provided, the flow path area is increased or decreased due to the stop variation of the valve body 18 and the flow rate is fluctuated, and the flow rate sensor 34 can detect the accurate flow rate. This is impossible, and the flow sensor 34 cannot be accurately verified.

  Therefore, by providing a region 38 having a constant flow area in a part of the flow rate variable region and opening and closing the pouring valve 10 of FIG. 1 in the region, the pouring valve 10 can be opened and closed at a constant flow rate. Become.

  Many of the commonly used bath pouring valves 10 are of a pilot type, and the pilot type pouring valve 10 has a feature that it is difficult to open at low water pressure.

  Further, at a high water pressure, a water hammer is generated when the pouring valve 10 is opened and closed, and pipe vibration and noise are generated. When the pouring valve 10 is opened and closed, if an orifice or the like having a constant flow path area is provided upstream, the on-off valve of the pouring valve 10 can be stabilized and water hammer can be prevented.

  Therefore, by providing the region 38 having a constant flow path area in a part of the flow rate variable region and opening and closing the pouring valve 10 in the region, the pouring valve 10 can be stably opened and closed to prevent water hammer. Is possible.

  As described above, the hot water supply apparatus according to the present invention can provide a hot water supply apparatus having a mixing valve having both functions of mixing hot water and water from a hot water tank and adjusting the hot water flow rate. And can be applied to heat pump water heaters.

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 3 Water supply pipe 4 Hot water supply mixing valve 5 Bath mixing valve 10 Pouring valve (opening / closing means)
DESCRIPTION OF SYMBOLS 16 Control apparatus 22 Water side opening part 23 Hot water side opening part 24 Valve body opening part 25 Outlet opening 26 Motor unit 27 Motor 34 Flow sensor 35 Valve body hot water side opening part 36 Valve body water side opening part 37 Flow rate control hole 38 Flow path Area with constant area

Claims (1)

A hot water storage tank for storing high-temperature hot water, a mixing valve for mixing water and hot water from the hot water storage tank , opening / closing means disposed on the downstream side of the mixing valve, and a control device, the mixing valve being a valve When the valve body is driven from the water side when the valve body is driven from the water side, there is a constant flow rate variable region in which the flow rate of water only varies, and then the mixed region where hot water and water are mixed is a constant interval. In the variable flow rate region, there is a section in which the flow area formed by the plurality of openings is substantially constant, and the opening / closing means is opened and closed in the section in which the flow area is substantially constant. A hot water supply apparatus characterized by having a configuration to be made.