JP5603159B2 - Water supply equipment - Google Patents

Description

  The present invention relates to a water supply apparatus that relieves a feeling of cooling until warm water is discharged.

  Conventionally, there has been a time lag between the operation of a lever, a switch, etc., when hot water is discharged, when water is discharged, such as in a sink or a bathroom vanity. This is because the hot water outlet of the faucet fitting is located far away from the hot water supply / water supply source and the length of the hot water supply pipe connecting the hot water supply / water supply source is long. This is because the water is discharged first. Moreover, if there is a water discharge interval, the hot water remaining in the hot water supply pipe is cooled and the temperature is lowered. As a result, the cold water is discharged after the operation.

  For this reason, there is an inconvenience that it takes time for hot water heated to the preset temperature to be discharged at the start of operations such as hand washing and dishwashing. Throw out room temperature or cold water until hot water comes out. There was a waste of being.

  In order to solve such problems of inconvenience and waste, a hot water supply apparatus as described in Patent Document 1 has been proposed. When the water stored in the container is reduced to a predetermined amount, the hot water supply apparatus supplies tap water to the container, energizes the heater, and maintains the water in the container at a predetermined temperature of about 40 ° C. Is.

  In the hot water supply apparatus, hot water warmed to the set temperature at the time of water discharge discharges water, and the time lag between the operation of the lever and the switch and the water discharge of hot water is eliminated. Therefore, it is expected that the hot water supply apparatus is excellent in convenience and can eliminate waste of wasted water.

  On the other hand, Patent Document 2 described below describes a water inlet auxiliary device that supplies hot water to a dual structure shower head that injects hot water from a nozzle in the center and discharges cold water from an outer peripheral hole at the same time as injection of high temperature water. ing. In this water supply auxiliary device, high-temperature water is allowed to flow through a thin pipe inside, and cold water is allowed to flow outside the thin pipe to be separately sent to the shower head without mixing the high-temperature water and the cold water.

JP 2002-195654 A Utility model registration No. 3138995

  However, the hot water supply apparatus described in Patent Document 1 includes various devices such as a pump, a temperature sensor, and a water amount sensor in order to realize the functions as described above, and it can be said that the apparatus configuration is not necessarily simple. This is reflected in the price of the water heater. In addition, it is necessary to keep the water stored in the container at a high temperature at all times, and there is also a problem that an electricity bill is required for heat insulation.

  The above problem is similarly pointed out with respect to the water inlet auxiliary device described in Patent Document 2. Patent Document 2 describes that a hot water supply / water supply source installed in a normal bathtub is used, and in order to instantaneously inject high temperature water from the nozzle at the center of the double structure shower head, This is because it is necessary to keep hot water in a tank and keep it warm.

  The present invention has been made in view of the circumstances as described above, alleviates the cooling sensation caused by room temperature water discharged after operation of a lever, switch, etc., suppresses waste of waste water, and also discharges hot water. It is an object of the present invention to provide a water supply apparatus that can reduce the waiting time and reduce the cost by realizing these with a simplified configuration.

 In order to solve the above problems, the water supply device of the present invention is provided with a branch water channel branched from the water supply channel in the middle of the water supply channel communicating with the hot water supply / water supply source, and a heater is installed in the middle of the branch water channel. The heating section provided is provided, and the downstream end of the water supply channel and the downstream end of the branch water channel are connected to the water discharge unit. In this water discharge unit, the hot water generated by heating the room temperature water flowing into the inside of the heating unit with a heater is generated. A water supply device in which a hot water outlet for discharging water and a normal temperature water outlet for discharging normal temperature water supplied through a water supply channel are formed on the bottom surface, and when water is discharged from the water discharge portion, the hot water generated in the heating portion Immediately after generation, the hot water is supplied from the heating unit to the water discharge unit and discharged from the hot water discharge port, and the warm water and normal temperature water discharged from the normal temperature water discharge port are not mixed with each other at the same time and separately. Pay below Characterized in that it adapted to be supplied to a position where the object is proffered.

  In this water supply apparatus, a tank provided with a heater is provided as a heating unit, and it is preferable that hot water is not stored in this tank.

  In this water supply apparatus, a power supply box for supplying power to the heater and a control means for controlling the power supply to the heater by the power supply box are provided, and the temperature of the water flowing through the branch waterway is controlled. A water temperature detecting means for detecting is provided, and this water temperature detecting means is electrically connected to the power supply box and the control means, and when the water temperature detecting means detects the temperature of the hot water, the detection signal is input to the control means and controlled. Preferably, the means transmits a command to stop the power supply to the heater to the power supply box based on the detection of the hot water temperature, and the power supply box stops the power supply to the heater in accordance with this command.

  Further, in this water supply apparatus, an electric three-way valve is provided at a branch portion where the branch water channel branches from the water supply channel, the three-way valve is electrically connected to the power supply box and the control means, A command for controlling opening and closing of the valve can also be transmitted, and it is preferable that the opening degree of the three-way valve is adjusted according to this command, and the amount of hot water generated in the heating unit can be adjusted.

  According to the water supply apparatus of the present invention, at the start of operations such as hand washing and dishwashing, hot water is supplied simultaneously and separately to the water supply target such as a person's hand that is presented below the water discharge unit at the same time as water discharge. Therefore, the cooling sensation due to the room temperature water can be alleviated by the hot water. For this reason, waste water can be prevented from being wasted, and the waiting time until hot water is discharged can be shortened, so that operations such as hand washing and dish washing can be performed immediately. In addition, various devices such as a pump can be omitted, the configuration is simplified, and the cost can be reduced.

It is the block diagram which showed roughly one Embodiment of the water supply apparatus of this invention. (A) and (b) are the bottom views and sectional views which showed one form of the water discharging part shown in Drawing 1, respectively. It is the bottom view which showed another form of the water discharging part shown in FIG. It is the graph which showed the result of the sensory evaluation which the water discharge in the monitor test of the water supply apparatus of this invention provided with the water discharging part shown in FIG. (A) is the result when cold water and hot water are applied to the palm after the start of water discharge, (b) is the case where hand washing is performed immediately after the start of water discharge, (c) is the result when water is stored and the hand is immersed It is. It is the graph which showed collectively the result of five-step sensory evaluation in a monitor test.

  As above-mentioned, FIG. 1 is the block diagram which showed roughly one Embodiment of the water supply apparatus of this invention.

  In the water supply apparatus 1, a water supply path 3 communicating with a hot water supply / water supply source 2 such as a water heater is provided. A lever 4 such as a faucet fitting is provided in the middle of the water supply channel 3, and supply of hot water at about 40 ° C. or room temperature water of about 20-25 ° C. or stop thereof through the water supply channel 3 by manual operation of the lever 4. It is possible. A downstream end 3 a of the water supply channel 3 in the flowing direction is connected to the water discharge unit 5, and the water discharge unit 5 communicates with the water supply channel 3. The water discharge part 5 can be provided in the downstream end of a water discharge direction in a faucet metal fitting, for example.

  The lever 4 can be replaced with a switch or the like as in the case of a conventional faucet fitting. The switch in this case can be, for example, a switch incorporating a human body detection sensor.

  Further, the water supply channel 3 is branched on the downstream side of the lever 4 with respect to the flowing water direction, and a branched water channel 6 is provided. An electric three-way valve 8 equipped with a motor 7 is provided at a branching portion 6 a where the branch water channel 6 branches from the water supply channel 3. The branch water channel 6 communicates with the water supply channel 3 and also communicates with the hot water supply / water supply source 2.

  A small tank 9 having a relatively small capacity is provided in the middle of the branch water channel 6 as a component of the heating unit. The tank 9 is hollow, and the inside thereof communicates with the branch water channel 6. The tank 9 also includes an electrothermal heater 10 and a thermostat 11 inside. In the tank 9, room temperature water supplied to the inside through the branch water channel 6 can be heated to a desired temperature set by the heater 10 and the thermostat 11. In the water supply apparatus 1, a heating unit is configured by a tank 9 provided with a heater 10. A heat insulating material 12 such as styrene foam is provided outside the tank 9, and the tank 9 is surrounded by the heat insulating material 12 inside. The heat insulating material 12 prevents heat from escaping to the outside, and the heat generated by the heater 10 by energization is efficiently used for heating room temperature water.

  In the water supply apparatus of the present invention, the heating unit does not necessarily include the tank 9, for example, by providing the heater 10 in a small capacity part such as a straight pipe part of the pipe forming the branch water channel 6. It can also be configured.

  The downstream end 6 b of the branch water channel 6 in the flowing water direction is connected to the water discharge unit 5 to which the downstream end 3 a of the water supply channel 3 is connected. Further, in the branch channel 6, a thermistor 14 is provided as a water temperature detection means 13 for detecting the temperature of water such as normal temperature water and hot water flowing in the branch channel 6 on the upstream side of the tank 9 in the flowing direction.

  In the water supply apparatus 1, a power supply box 15 that supplies power to the heater 10 and a control unit 16 that controls supply of power to the heater 10 by the power supply box 15 are provided. The power supply box 15 can be connected to a household power supply, and can supply, for example, AC 100V. The heater 10 is electrically connected to the power supply box 15 and the control means 16. Similarly, the thermostat 11 and the thermistor 14 are also electrically connected to the power supply box 15 and the control means 16.

  An electric signal relating to the temperature of the water in the tank 9 detected by the thermostat 11 is input to the power supply box 15, and the power supply box 15 energizes the heater 10 based on the temperature of the hot water preset in the power supply box 15. Control and stop energization. The room-temperature water in the tank 9 is heated to a set temperature by the heat generated by the heater 10, and hot water having a constant temperature is generated. Since the tank 9 is small and has a relatively small capacity, hot water is generated in a short time. In general, the set temperature of hot water is approximately 30 ° C. higher than room temperature water. The temperature setting of the hot water can be changed by the control means 16. The temperature of the hot water set in the power supply box 15 is changed according to the command transmitted from the control means 16. For example, the set temperature can be changed by changing the power supplied to the power supply box 15 or the like. Such a control means 16 can be configured, for example, as an electric circuit or a microcomputer programmed in advance in the power supply box 15.

  The temperature of the water flowing through the branch water channel 6 detected by the thermistor 14 is input to the power supply box 15 as needed as an electrical signal. When the thermistor 14 detects that the temperature of the water supplied from the hot water supply / water supply source 2 is equal to or higher than a predetermined temperature, the detection signal is input to the control means 16, and the control means 16 is based on the detection of the hot water temperature. Then, a command for stopping the supply of power to the heater 10 is transmitted to the power supply box 15. In accordance with this command, the power supply box 15 stops supplying power to the heater 10. Thereafter, no warm water is generated in the tank 9.

  The water discharge part 5 discharges the normal temperature water spout 18 which discharges the normal temperature water 17 supplied through the water supply path 3 to the bottom face part 5a, and the warm water 19 which produced | generated the normal temperature water in the tank 9 by heating with the heater 10. A warm water spout 20 is formed. Inside the water discharge section 5, the water passage for the normal temperature water 17 and the water passage for the hot water 19 are separated from each other and independent, and the normal temperature water 17 and the hot water 19 do not mix inside the water discharge section 5. The normal temperature water 17 is discharged from the normal temperature water outlet 18, and the warm water 19 is discharged from the hot water outlet 20. At this time, the normal temperature water 17 and the hot water 19 are discharged simultaneously.

  Further, the room temperature water 17 and the hot water 19 are separately supplied to the water supply target such as a person's hand h to be provided below the water discharge unit 5 when they are subjected to operations such as hand washing and dish washing. In operations such as hand washing and dishwashing, a distance d from the bottom surface of the water discharge unit 5 to a position where a water supply target such as a human hand h is provided below the water discharge unit 5 is generally about 50 mm. Up to the distance d of about 50 mm, the normal temperature water 17 and the hot water 19 are supplied simultaneously to water supply objects such as human hands h without being mixed with each other.

  The amount of water of the hot water 19 supplied to a water supply target such as a human hand h can be adjusted. This adjustment is performed by the control means 16, and a command related to the opening degree of the three-way valve 8 is transmitted to the motor 7 provided in the three-way valve 8. The motor 7 rotates according to this command, and the opening degree of the three-way valve 8 is changed. Generally, the amount of hot water 19 can be 1.2 times or more that of normal temperature water 17 as a guide.

  In such a water supply device 1, when the lever 4 is operated during hand washing, dishwashing, etc., and the supply of room temperature water from the hot water supply / water supply source 2 to the water discharge unit 5 is started, the room temperature water 17 is supplied from the hot water supply / water supply source 2. Supplied into the path 3. The three-way valve 8 has both the water supply channel 3 and the branch water channel 6 open, and the room temperature water 17 flows through the water supply channel 3 toward the downstream end 3a, while part of the water flows in the branch water channel 6. It flows into the tank 9. The thermistor 14 detects the temperature of the normal temperature water 17 flowing through the branch water channel 6, and a detection signal is output to the power supply box 15. The power supply box 15 is in the ON state, supplies power to the heater 10 according to the water temperature detection, the heater 10 generates heat, and the normal temperature water 17 flowing into the tank 9 is heated by the heater 10. At this time, the thermostat 11 monitors the water temperature in the tank 9 and outputs an electrical signal related to the temperature of the water in the tank 9 to the power supply box 15. And the normal temperature water 17 in the tank 9 is heated to preset temperature, and the hot water 19 of fixed temperature produces | generates. Since the capacity of the tank 9 is relatively small, the hot water 19 is generated in a short time. And the produced | generated warm water 19 is toward the downstream end 6b from the tank 9 immediately after production | generation according to that the tank 9 is small and according to the flow velocity, water pressure, etc. of the normal temperature water 17 which flows through the branch water channel 6. leak.

  Thus, the normal temperature water 17 is supplied to the water discharger 5 through the water supply channel 3, and simultaneously, the warm water 19 is supplied to the water discharger 5 through the branch waterway 6. A room temperature water 17 is discharged from the room temperature water discharge port 18 of the water discharge unit 5, and a hot water 19 is discharged from the hot water discharge port 20, and a person's hand h or the like which is presented at a distance d below the water discharge unit 5. The normal temperature water 17 and the hot water 19 are separately supplied to the water supply target without being mixed with each other.

  As described above, since the normal temperature water 17 and the hot water 19 are discharged from the water discharge unit 5 at the same time and separately without mixing the normal temperature water 17 and the hot water 19 to the position where the water supply target is provided. 1 can make the warm water 19 feel at the same time when the room temperature water 17 hits a human hand h. For this reason, the cooling sensation when the normal temperature water 17 hits the person's hand h can be relieved by the warmth of the hot water 19, and an illusion can be made to make the person feel that only the hot water 19 is spitting out. . A person can feel as if the hot water 19 discharged water without any time lag from the operation of the lever 4, and the waiting time can be shortened. Without feeling the cold feeling of the room temperature water 17, after the operation of the lever 4, operations such as hand washing and dish washing can be performed immediately. Wasted water is prevented and water is saved. In particular, when the temperature of the hot water 19 is about 30 ° C. higher than the temperature of the normal temperature water 17, the amount of the warm water 19 is 1.2 times or more than the amount of the normal temperature water 17, or both, Effective by mitigation. Further, the amount of hot water 19 supplied at the start of water discharge can be made sufficiently small as compared with the hot water supply device described in Patent Document 1. Therefore, even if a heater 10 with low power consumption is used, the warm water 19 can be generated by heating the room temperature water 17 to the set temperature in a short time, and the power consumption can be reduced.

  Thereafter, hot water generated by heating to a set temperature from the hot water supply / water supply source 2 is supplied to the water supply channel 3, and when a part thereof flows through the branch water channel 6, the temperature of the normal temperature water 17 flowing through the branch water channel 6 is monitored. The thermistor 14 is detecting that the temperature of the water is equal to or higher than a predetermined temperature. This detection signal is also input to the control means 16, and at this time, the control means 16 transmits a command for stopping the supply of power to the heater 10 to the power supply box 15 based on the detection of the hot water temperature. In accordance with this command, the power supply box 15 stops supplying power to the heater 10. The hot water flowing into the tank 9 flows out to the water discharge unit 5 without being reheated by the heater 10. Hot water is discharged from both the normal temperature water outlet 18 and the hot water outlet 20 of the water discharger 5 and supplied to a water supply target such as a human hand h.

  Thus, in the water supply apparatus 1, the hot water 19 is not stored in the tank 9, and it is not necessary to keep the hot water in the tank 9. Therefore, in the water supply apparatus 1, various devices such as a pump provided in the hot water supply apparatus described in Patent Document 1 are omitted, the configuration is simplified, and cost reduction is achieved. Moreover, the power consumption at the time of water supply standby | waiting can also be reduced, and the water supply apparatus 1 is excellent also in cost performance.

  In the water supply apparatus of the present invention, the hot water supply / water supply source does not necessarily have to be a water heater, and may include a case where only a water pipe is used. In this case, since hot water is not supplied from the hot water supply / water supply source, the control means does not transmit a command for stopping the supply of power to the heater to the power supply box based on the detection of the hot water temperature.

  2A and 2B are a bottom view and a cross-sectional view, respectively, showing an embodiment of the water discharger shown in FIG.

  The water discharger 21 applied to the water discharger 5 shown in FIG. 1 includes a substantially cylindrical outer tube 22 and a substantially cylindrical inner tube 23 having a diameter smaller than that of the outer tube 22. The outer cylinder 22 has an outer shape that is substantially circular, the outer shape is also substantially circular, and a bottom plate 25 that forms the bottom surface portion 5a, and is thicker than the upper plate 24 and the bottom plate 25. It is formed from a cylindrical body portion 26. In the outer cylinder 22, the upper plate 24 and the bottom plate 25 are arranged to face each other, and at their outer peripheral edge portions, they are fixed to the barrel portion 26 at four locations in the diametrical direction by screws 27, and between the barrel portion 26 and O The water tightness is maintained by interposing the ring 28. Further, in the outer cylinder 22, a substantially cylindrical water inlet portion 29 is projected substantially vertically upward at a substantially central portion of the upper plate 24, and a similar water inlet portion 30 is projected outward of the trunk portion 26. Yes. The water inlet 29 provided on the upper plate 24 is a portion to which the downstream end 6 b of the branch water channel 6 shown in FIG. 1 is connected, and the water inlet 30 provided on the trunk portion 26 is the downstream end of the water supply channel 3. 3a is a connected part. In the outer cylinder 22, the bottom plate 25 penetrates the front and back, and a plurality of circular normal temperature water spouts 18 are formed, and the part corresponding to the hot water spout 20 also penetrates the front and back to form a circular shape. A plurality of insertion openings 31 are formed. The diameter of the insertion port 31 is made larger than the diameter of the hot water spout 20. The room temperature water spouting port 18 and the insertion port 31 are arranged on the same circumference, and the bottom plate 25 has four rows of opening rows 32, 33, 34, and 35 formed substantially at the center thereof. In each opening row 32, 33, 34, 35, the room temperature water outlet 18 and the insertion port 31 are alternately arranged at equal intervals, and between the adjacent opening rows 32, 33, 34, 35, the room temperature water outlet 18 The insertion ports 31 are alternately arranged at equal intervals.

  The inner cylinder 23 is divided into two parts, that is, an upper half part 36 and a lower half part 37, and the lower end part of the upper half part 36 is formed integrally with the upper end part of the lower half part 37. A substantially cylindrical joint portion 39 protrudes upward from the center portion of the upper plate 38 of the upper half portion 36 in a substantially disc shape. The outer diameter of the upper end portion of the joint portion 39 substantially coincides with the inner diameter of the water inlet portion 29 of the hot water 19 projecting from the upper plate 24 of the outer cylinder 22. In the lower half portion 37, a plurality of round bar-like protrusions 41 protrude from the bottom surface of the substantially disk-like bottom plate 40. The protrusion 41 is provided at a position corresponding to the insertion port 31 formed in the bottom plate 25 of the outer cylinder 22, and the outer diameter thereof substantially coincides with the diameter of the insertion port 31. In addition, a circular hot water outlet 20 penetrating from the upper end to the lower end is formed at the center of the protrusion 41.

  The inner cylinder 23 inserts one protrusion 41 into each insertion port 31 formed in the bottom plate 25 until the bottom surface of the protrusion 41 is disposed on the same plane as the bottom surface of the bottom plate 25, and the upper end portion of the joint portion 39. Is fitted into the inside of the water inlet 29 via the O-ring 42 and is attached and fixed inside the outer cylinder 22. In the fixed state, a water passage 43 is formed between the bottom surface of the lower half portion 37 of the inner cylinder 23 and the upper surface of the bottom plate 25 of the outer cylinder 22.

  In such a water discharge portion 21, the room temperature water discharge port 18 and the warm water discharge port 20 are arranged on the same circumference in the bottom plate 25 of the outer cylinder 22, and four rows of the room temperature water discharge port 18 and the hot water discharge port 20 are arranged. The opening rows 32, 33, 34, and 35 are formed concentrically at substantially the center of the bottom plate 25. In each opening row 32, 33, 34, 35, the room temperature water discharge port 18 and the hot water discharge port 20 are alternately arranged at equal intervals, and the room temperature water discharge is also performed between the adjacent opening rows 32, 33, 34, 35. The water ports 18 and the hot water outlets 20 are alternately arranged at equal intervals.

  The normal temperature water 17 supplied from the downstream end 3 a of the water supply channel 3 shown in FIG. 1 to the water discharger 21 through the water inlet 30 flows into the outside of the inner cylinder 23 inside the outer cylinder 22 and passes through the water passage 43. Then, water is discharged downward from the room temperature water outlet 18. The hot water 19 supplied from the downstream end 6 b of the branch water channel 6 to the water discharger 21 through the water intake 29 flows into the inner cylinder 23, and downward from the hot water discharger 20 formed on the protrusion 41 provided on the bottom plate 40. Water is discharged. As described above, in the water discharge unit 21, the water flow path of the normal temperature water 17 and the water flow path of the hot water 19 are separated from each other and independent, and the normal temperature water 17 and the hot water 19 are mixed with each other inside the water discharge unit 21. Instead, water is discharged separately from the room temperature water outlet 18 and the hot water outlet 20 toward the water supply target in a shower shape.

  FIG. 3 is a bottom view showing another form of the water discharger shown in FIG.

  The water discharger 44 is also applicable to the water discharger 5 shown in FIG. 1, and parts common to the water discharger 21 shown in FIGS. 2A and 2B are denoted by the same reference numerals in FIG. In the following, description thereof is omitted.

  In the water discharge portion 44, the opening rows 32 and 34 formed in the bottom plate 25 forming the bottom surface portion 5a are rows in which only the room temperature water discharge ports 18 are arranged at equal intervals on the circumference. However, only the hot water outlets 20 are arranged at equal intervals on the circumference. On the other hand, between the adjacent opening rows 32, 33, 34, 35, the room temperature water outlet 18 and the hot water outlet 20 are alternately arranged at equal intervals. These four opening rows 32, 33, 34, and 35 are arranged concentrically at substantially the center of the bottom plate 25, similarly to the opening rows 32, 33, 34, and 35 shown in FIGS. Has been.

  Also in such a water discharge part 44, the passage of normal temperature water 17 and the passage of hot water 19 are separated and independent from each other, and the normal temperature water 17 and the hot water 19 are not mixed with each other, Water is discharged from the water discharge port 18 and the hot water discharge port 20 separately in a shower shape toward the water supply target.

  Using the water supply device 1 provided with the water discharge unit 44 shown in FIG. 3, the lever 4 is operated to supply cold water (water temperature 5 ° C.) and hot water (water temperature 30, 40, 50 ° C.) from the water discharge unit 44. A monitor test was conducted when water was discharged from 2 until hot water was supplied. As described above, in the water discharge section 44, the opening rows 32 and 34 in which only the normal temperature water discharge ports 18 are arranged on the circumference at equal intervals, and the openings in which only the hot water discharge ports 20 are arranged at equal intervals on the circumference. The rows 33 and 35 are formed concentrically at substantially the center of the bottom plate 25. On the other hand, the room temperature water outlet 18 and the hot water outlet 20 are alternately arranged at equal intervals between the adjacent opening rows 32, 33, 34, 35. A human hand h was inserted as a water supply target at a position 50 mm downward from the bottom surface of the bottom plate 25 of the water discharger 44, and cold water and hot water were supplied simultaneously and separately from the water discharger 21.

  The test environment was a room temperature of 20 ° C., and the flow rates of cold water and hot water were both 2 L / min.

  In the water discharge part 44, the diameters of the normal temperature water discharge port 18 and the warm water discharge port 20 formed on the bottom plate 25 are both 0.5 mm, and the normal temperature water discharge port is formed in any of the opening rows 32, 33, 34, and 35. The number of 18 and the warm water spout 20 was arrange | positioned at equal intervals on the circumference as 12 equal numbers. The diameter of the innermost opening row 32 is φ16.8 mm, the diameter of the nearest outer opening row 33 is φ21.2 mm, and the diameter of the nearest outer opening row 34 is φ25.6 mm. Further, the diameter of the outermost opening row 35 was set to φ30 mm.

  4A shows a case where cold water and hot water are applied to the palm after the start of water discharge, FIG. 4B shows a case where hand washing is performed immediately after the start of water discharge, and FIG. It is the result of the monitor test when dipping. There were 6 subjects, and in the monitor test, a sensory test was conducted in which water discharge was acceptable and unacceptable. In addition, sensory evaluation in 5 stages was performed. Cold is 1, cold is 2, cold is 3, warm is 4, warm is 5. The graph of FIG. 5 shows the result. In FIGS. 4 (a), (b), (c) and FIG. 5, the horizontal axis indicates the temperature of hot water. Further, the vertical axis of FIG. 5 takes 1-5 of 5-step evaluation, and the average value of 5-step evaluation is plotted in FIG.

  It is found that even if 5 ° C. cold water is discharged, if the temperature of the hot water is 40 ° C. or higher, the cold feeling of the cold water can be substantially alleviated. Even if hot water is not supplied immediately after water discharge, it is confirmed that room temperature water and hot water can be supplied simultaneously and separately without mixing each other, and work such as hand washing and dishwashing can be performed immediately after the start of water discharge. .

  Of course, the present invention is not limited to the above embodiments and examples. It goes without saying that various modes are possible for details such as the configuration and shape of the water discharger, the configuration of the power supply box and the control means, the amount of room temperature water and hot water, and the temperature of hot water.

DESCRIPTION OF SYMBOLS 1 Water supply apparatus 2 Hot water supply / water supply source 3 Water supply path 3a Downstream end 5 Water discharge part 5a Bottom face part 6 Branch water path 6a Branch part 6b Downstream end 8 Three-way valve 9 Tank 10 Heater 13 Water temperature detection means 15 Power supply box 16 Control means 17 Normal temperature water 18 Normal temperature water outlet 19 Hot water 20 Hot water outlet h Human hand as a water supply target

Claims (4)

A branch water channel branched from the water supply channel is provided in the middle of the water supply channel communicating with the hot water supply / water supply source, and a heating unit provided with a heater is provided in the middle of the branch water channel, and the downstream end of the water supply channel and the A downstream end of the branch water channel is connected to a water discharge unit. The water discharge unit is supplied through a water supply channel and a hot water water discharge port for discharging hot water generated by heating the room temperature water flowing into the heating unit with the heater. A water supply device in which a room temperature water outlet for discharging room temperature water is formed on the bottom surface,
When water is discharged from the water discharge unit, the hot water generated in the heating unit is supplied from the heating unit to the water discharge unit immediately after generation and is discharged from the hot water discharge port, and is discharged from the warm water and the normal temperature water discharge port. The water supply apparatus is characterized in that the room temperature water is supplied to the position where the water supply target is provided below the water discharge unit simultaneously and separately without being mixed with each other.   The water supply apparatus according to claim 1, wherein a tank including a heater is provided as the heating unit, and hot water is not stored in the tank.   A power supply box for supplying power to the heater and a control means for controlling the supply of power to the heater by the power supply box are provided, and a water temperature detection means for detecting the temperature of the water flowing through the branch waterway. The water temperature detection means is electrically connected to the power supply box and the control means, and when the water temperature detection means detects the temperature of hot water, the detection signal is input to the control means, 3. A command for stopping the supply of electric power to the heater is transmitted to the power supply box based on the detection of the hot water temperature, and the power supply box stops the supply of electric power to the heater according to the command. The water supply apparatus as described in.   An electric three-way valve is provided at a branch portion where the branch water channel branches from the water supply channel, and the three-way valve is electrically connected to the power supply box and the control unit, and the control unit opens and closes the three-way valve. A command for controlling the temperature can be transmitted, the opening of the three-way valve is adjusted according to the command, and the amount of hot water generated in the heating unit is adjustable. Water supply device.

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