JP5974270B2 - 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. 6, 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 a water supply pipe 3, and a lower part of the hot water storage tank 1 and a 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. 7, 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 Two valves, a flow rate adjusting valve that adjusts the discharged hot water flow rate of the mixed hot water, and two position detecting means for detecting the position of the valve body are required, resulting in an increase in cost.

The present invention solves the above-described conventional problems, and improves the accuracy of valve body position control in a mixing valve having both functions of mixing hot water and water from a hot water storage tank and adjusting the hot water flow rate. An object is to provide a hot water supply apparatus.

In order to solve the conventional problems, a hot water supply apparatus of the present invention includes a hot water storage tank for storing high-temperature hot water, a bath mixing valve for mixing water and hot water from the hot water storage tank, and a downstream side of the bath mixing valve. The bath mixing valve has a plurality of openings in the valve body, and when the valve body is driven from the water side, the flow rate at which only the flow rate of water fluctuates is provided. After the variable region exists in a certain section, the mixed region where hot water and water are mixed exists in a certain section, and the origin position of the valve body position detecting means is the water flow side of the valve body in the variable flow region. The flow rate from is set to a substantially minimum position.

  As a result, hot water can be prevented from being discharged, and the origin of the valve body position detection means is provided at a position where the flow rate in the flow rate variable region is substantially minimized. Even if a hot water pouring valve is broken, by setting the opening of the bath mixing valve to the position where the flow rate is at the minimum, wasteful outflow of water into the bathtub can be minimized, and the reliability of the hot water supply device Can be improved.

The hot water supply apparatus of the present invention includes a hot water storage tank for storing high-temperature hot water, a bath mixing valve for mixing water and hot water from the hot water storage tank, and a control device, the control device including a trial operation mode, The bath mixing valve has a plurality of openings in the valve body, and when the valve body is driven from the water side, hot water and water are mixed after the flow variable region in which the flow rate of only water fluctuates exists for a certain period. The mixed region is configured to exist in a certain section, and the origin position of the position detection means of the valve body is a position where the flow rate from the water side of the valve body is substantially maximum.

  This makes it possible to detect the maximum water-side position of the valve body with high accuracy, and in the trial run, water can be poured into the bathtub in the shortest time without using hot water in the hot water tank, resulting in less waste and shorter time. It becomes possible to perform a trial run in time.

  ADVANTAGE OF THE INVENTION According to this invention, the hot_water | molten_metal supply apparatus which improved the precision of the valve body position control can be provided in the mixing valve which has both the function of mixing the hot water and water from a hot water storage tank, and adjustment of a tapping flow rate.

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, the flow path area (opening area) and the origin detection position 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). The figure which shows the relationship between the rotation angle of the valve body of the bath mixing valve of the hot water supply apparatus of Embodiment 1 of this invention, a mixing ratio, a flow-path area (opening area), and another origin detection position. Configuration diagram of conventional hot water supply equipment Configuration of conventional bath mixing valve

A first invention includes a hot water storage tank for storing hot water, a bath mixing valve for mixing water and hot water from the hot water storage tank, a pouring valve disposed on the downstream side of the bath mixing valve, and a control device The bath 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 alone fluctuates exists for a certain period, The mixing area where water is mixed is configured to exist in a certain section, and the origin position of the valve body position detection means is the position where the flow rate from the water side of the valve body is substantially minimum in the flow rate variable area. It is a hot water supply device characterized by this.

  As a result, hot water can be prevented from being discharged, and the origin of the valve body position detection means is provided at a position where the flow rate in the flow rate variable region is substantially minimized. Even if a hot water pouring valve is broken, by setting the opening of the bath mixing valve to the position where the flow rate is at the minimum, wasteful outflow of water into the bathtub can be minimized, and the reliability of the hot water supply device Can be improved.

2nd invention is equipped with the hot water storage tank which stores high temperature hot water, the bath mixing valve which mixes water and the hot water from the said hot water storage tank, and a control apparatus, The said control apparatus contains trial run mode, The said bath 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 where the flow rate of water only varies, and then there is a mixing region where hot water and water mix. The hot water supply apparatus is characterized in that a constant section exists, and the origin position of the valve body position detecting means is a position where the flow rate from the water side of the valve body is substantially maximum.

  This makes it possible to detect the maximum water-side position of the valve body with high accuracy, and in the trial run, water can be poured into the bathtub in the shortest time without using hot water in the hot water tank, resulting in less waste and shorter time. It becomes possible to perform a trial run in time.

  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 indicating the origin position of the valve body 18 is embedded in the output gear 29, and the rotational position of the valve body 18 can be detected by the Hall IC 31 through the output gear 29.

  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.

  FIG. 3 is a diagram showing the relationship between the rotation angle of the valve body of the bath mixing valve 5 of Embodiment 1 of the present invention, the mixing ratio, the flow path area, and the origin position of the valve body position detecting means.

  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).

  A flow restriction hole 37 having an opening area smaller than the valve body water side opening 35 and the valve body water side opening 36 is provided, and the flow restriction hole 37, the valve body water side opening 35, and the valve body water side opening 36 are provided. Is longer than the opening width of the water-side opening 22 and the hot water-side opening 23, so that even if the valve body 18 is rotated, the flow path area is initially constant only by the flow restriction hole 37. In addition, a region where the water flow rate is at a minimum constant is secured.

  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 valve body water side opening 36 and the water side opening 2 of the body 17 are rotated.
2 overlap, the overlap area of the valve body hot water side opening 35 and the hot water side opening 23 of the body 17 is maximized, and the mixing ratio is 100% (hot water side fully open). The flow path area from the water side full open to the hot water side full open is substantially constant.

  Further, the origin position (magnet 30) of the valve body position detection means is set to the position of the flow rate variable region having the minimum flow path area at the mixing ratio of 0% (water only) (position in the figure = the minimum range of the water side flow rate). Since the rotation angle of the valve body is always determined from the number of motor drive pulses from this origin, this origin position detected by the Hall IC 31 is the most accurate position.

  This origin position is the farthest position from the 100% mixing ratio (hot water side fully open) state where hot water with the highest temperature is produced as the control state of the bath mixing valve.

  Here, assuming a case where the hot water pouring valve 10 has an “open” failure, the flow rate of the valve body 18 of the bath mixing valve 5 is minimized in order to minimize the water pouring into the bathtub at a safe low temperature. What is necessary is just to drive to a valve body origin position (position of illustration 38). It should be noted that the above effect can be exhibited if the origin position of the valve body position detecting means is in the vicinity of the minimum flow path area.

  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, in order to control the hot water flow rate, a flow rate control mechanism different from the bath mixing valve, such as the flow rate adjustment valve 12, is required. In the case of the above-described pouring valve “open” failure, the flow rate adjustment valve is set to the minimum flow rate. In addition, since it is necessary to adjust the bath mixing valve to the water side fully open, it is necessary to adjust the two control amounts of the bath mixing valve and the flow rate adjusting valve 12 for detecting the position of the valve body. 5 can be used to control the flow rate adjustment and mixing of hot and cold water with a single valve as described above, eliminating the need for a separate flow rate control mechanism as in the prior art, saving power and simplifying the control system. It is possible to provide a compact and inexpensive hot water supply apparatus.

  FIG. 5 is a diagram showing the relationship between the rotation angle of the valve body of the bath mixing valve 5, the mixing ratio and the flow path area, and the origin position of other valve body position detecting means.

  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.

  The origin position (magnet 30) of the valve element position detection means is a mixture ratio of 0% (water only), and the flow path area where the overlap area between the valve element water side opening 36 and the water side opening 22 is the largest. The position of the variable flow area (position 39 in the figure = maximum water-side flow rate position, water-side fully open position) is always determined by the number of motor drive pulses from this origin. This origin position detected by the IC 31 is the most accurate position.

  Here, when the operation at the time of trial operation is assumed, in order to fill the bathtub 12 in a short time without wasting hot water in the hot water tank 1, the valve body 18 of the bath mixing valve 5 is the maximum on the water side. What is necessary is just to drive to a valve body origin position (position of illustration 39). In addition, if the origin position of this valve body position detection means is near the water-side maximum flow rate position, the above effect can be exhibited.

  In this way, it is possible to control the two control amounts of the water amount and the mixing ratio with a single valve body position detection means, eliminating the need for another flow rate control mechanism like the conventional technology, saving power and simplifying the control system. It is possible to provide a compact and inexpensive hot water supply apparatus.

  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 rate sensor 35 Valve body hot water side opening part 36 Valve body water side opening part 37 Flow control hole 38 Water side Minimum flow position 39 Maximum water side flow position

Claims (2)

Comprising a hot water tank to store hot water, the bath mixing valve for mixing the hot water from the water hot water tank, and notes hot valve disposed on the downstream side of the bath mixing valve, and a control device, wherein the bath The mixing valve has a plurality of openings in the valve body, and when the valve body is driven from the water side, a mixture in which hot water and water are mixed after there is a constant flow rate variable region in which the flow rate of only water varies. The hot water supply apparatus is characterized in that a region exists in a certain section, and the origin position of the valve body position detecting means is a position where the flow rate from the water side of the valve body is substantially minimum in the flow rate variable region. . A hot water storage tank for storing high-temperature hot water, a bath mixing valve for mixing water and hot water from the hot water storage tank, and a control device, the control device including a test operation mode, wherein the bath mixing valve has a plurality of valve bodies. When there is an opening and the valve body is driven from the water side, there is a constant flow rate variable region where the flow rate of only the water fluctuates, followed by a mixed region where hot water and water are mixed. The hot water supply apparatus is characterized in that the origin position of the position detection means of the valve body is a position where the flow rate from the water side of the valve body is substantially maximum.