JP2013068412A - Hot water cascading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the water of a high temperature from falling when a high hot water supply temperature is accidentally set, in a hot water cascading device including a hot water cascading nozzle 41 for allowing the hot water heated by a heat exchanger 51 for supplying hot water of a heat source machine 5 to fall into a bathtub.SOLUTION: This hot water cascading device includes a hot water cascading solenoid valve 46 disposed in a hot water cascading pathway 42 for supplying hot water to the hot water cascading nozzle 41, a draining pathway 47 branched from the hot water cascading pathway 42 at an upstream side with respect to the hot water cascading solenoid valve 46, a draining solenoid valve 48 disposed in the draining pathway 47, and a temperature sensor 45 detecting a temperature of the hot water at a part of the hot water cascading pathway 42 at the upstream side with respect to a branch of the draining pathway 47. When the detection temperature of the temperature sensor 45 becomes equal to or higher than a prescribed upper limit temperature, hot water cascading stop processing for closing the hot water cascading solenoid valve 46 and opening the draining solenoid valve 48 when a manual operation for instructing the draining is executed is performed.

Description

  The present invention relates to a tapping hot water apparatus including a tapping hot water nozzle that drops hot water heated by a heat exchanger for hot water supply of a heat source machine into a bathtub.

  The conventional hot water hot water supply device supplies hot water in the bathtub to the hot water nozzle through the hot water channel that is branched from the bath chase circuit that circulates the hot water in the bathtub with the heat source machine. (For example, refer patent document 1).

  However, it is not preferable for hygiene to drop hot water in the bathtub and drop it from the hot water nozzle. Therefore, it is desired that hot water heated by a heat exchanger for hot water supply of a heat source machine is applied and dropped from a hot water nozzle.

  Here, the hot water supply temperature can be variably set up to 60 ° C. with the hot water remote controller. And when hot water heated by a heat exchanger for hot water supply is supplied to the hot water nozzle, if the hot water temperature is set to a high temperature by mistake, there is a possibility that the hot water will fall to the bather. It is necessary to take safety measures.

JP 2001-41474 A

  In view of the above, the present invention provides a hot water hot water device that can prevent the hot water from falling in the hot water heated by the heat exchanger for hot water supply of the heat source device to be supplied to the hot water nozzle. The task is to do.

  In order to solve the above-mentioned problems, the present invention provides a hot water hot water supply device including a hot water nozzle that drops hot water heated by a heat exchanger for hot water supply of a heat source machine into a bathtub, and supplies hot water to the hot water nozzle. A basin hot water solenoid valve interposed in the basin hot water channel supplying hot water from the heat exchanger, a drainage channel branched from the portion of the basin hot water channel upstream of the basin hot water solenoid valve, and a drainage channel The drainage solenoid valve installed in the basin, the simmering hot water temperature sensor that detects the temperature of hot water at the basin hot water channel upstream from the branch point of the drainage channel, and the opening and closing control of the basin hot water solenoid valve and drainage solenoid valve And a control means for opening the simmering hot water solenoid valve and causing the hot water operation to drop the hot water from the simmering hot water nozzle so that the detected temperature of the simmering hot water temperature sensor is equal to or higher than a predetermined upper limit temperature. When it becomes, the tapping water solenoid valve is closed and the drainage Run hot water stop processing was struck to open the valve, the temperature detected by the hit was hot water temperature sensor when below the upper limit temperature, characterized in that it is configured so as to close the drainage solenoid valve.

  According to the present invention, when the temperature of hot water from the hot water supply heat exchanger becomes equal to or higher than the upper limit temperature, the hot water solenoid valve is closed and the supply of hot water to the hot water nozzle is shut off. Therefore, even if the hot water supply temperature is mistakenly set to a high temperature, the hot hot water does not fall from the hot water nozzle. However, simply closing the tapping hot water solenoid valve will stop the tapping hot water after the tapping hot water is stopped, and when the user resets the hot water supply temperature again and resumes tapping hot water operation. There is a possibility that hot hot water remaining in the water drops from the hot water nozzle. On the other hand, in the present invention, when the temperature of the hot water from the hot water supply heat exchanger becomes equal to or higher than the upper limit temperature, not only the hot water solenoid valve is closed, but also the detected temperature of the hot water temperature sensor has the upper temperature limit. Since the drainage electromagnetic valve is opened until it falls below, the hot residual water in the tapped hot water channel is drained through the drainage channel. Accordingly, it is possible to prevent the hot residual water from dropping from the hot water nozzle when the hot water operation is resumed, which is safe.

  By the way, in an apartment house, since the water cannot be discharged from the drainage channel to the outside, the water from the drainage channel is drained to one corner of the bathroom washroom. In this case, if high-temperature water is drained carelessly from the drainage channel, there is a risk of making the bather feel hot.

  In order to eliminate such inconvenience, in the present invention, it is desirable that the control means is configured to open the drainage electromagnetic valve when manual operation for instructing drainage is performed during the pouring hot water stop processing. According to this, unless a bather performs manual operation, it is not drained and high temperature water is carelessly drained from a drainage channel, and it can prevent having a hot thought. Furthermore, it is advantageous that the notifying means for notifying that drainage is performed is activated when the drainage electromagnetic valve is opened, so that the bather can be further alerted.

  Further, in the present invention, the control means is configured to execute a hot water hot water stop process when a predetermined waiting time has elapsed when the temperature detected by the hot water temperature sensor becomes equal to or higher than the upper limit temperature. It is desirable that the time be set shorter as the detected temperature of the hot water temperature sensor becomes higher. According to this, it is possible to achieve both prevention of useless interruption of hot water and ensuring safety at high temperatures when the temperature of hot water from a hot water supply heat exchanger changes temporarily from an appropriate temperature.

Explanatory drawing which shows the installation state of the bathroom heater which comprises the tap hot water apparatus of embodiment of this invention. FIG. 2 is a cut side view of the bathroom heater of FIG. FIG. 2 is a circuit diagram showing a piping structure of the bathroom heater of FIG. The flowchart which shows the content of the hot water control of embodiment.

  With reference to FIG. 1, BR has shown the bathroom. In the bathroom BR, a bathtub BT is installed on one side (right side) of the washing place BRa. Moreover, the bathroom heater 1 is installed in the ceiling part of bathroom BR so that it may be located above bathtub BT.

  Referring to FIGS. 2 and 3, bathroom heater 1 includes heating device 2, mist device 3, and hot water device 4. Further, as shown in FIG. 3, hot water and a heat medium (water, antifreeze liquid, etc.) are supplied to each of the devices 2, 3, and 4 from a heat source unit 5 for hot water supply and heating. The heat source unit 5 includes a hot water supply heat exchanger 51 heated by the hot water supply burner 51a and a heating heat exchanger 52 heated by the heating burner 52a.

  The heating device 2 communicates with the inlet 21 with the fixed louver 21a and the outlet 22 with the variable louver 22a formed in the lower surface cover 1b of the heater main body 1a in the heater main body 1a of the bathroom heater 1. Are provided with a ventilation path 23, a circulation fan 24 that circulates air in the bathroom BR via the ventilation path 23, and a radiator 25 that heats the air flowing through the ventilation path 23. A main heat medium circulation path 26 connected to the heating heat exchanger 52 of the heat source unit 5 is connected to the radiator 25. The main heat medium circulation path 26 is provided with a circulation pump 26a, a heating heat medium valve 26b, and a cistern 26c. For heating by operating the circulation pump 26a and opening the heating medium valve 26b. A heat medium circulates between the heat exchanger 52 and the radiator 25. The heat medium is heated by the heating heat exchanger 52 and radiated by the radiator 25. Then, the air in the bathroom BR sucked into the ventilation path 23 from the suction port 21 by the operation of the circulation fan 24 is heated by the radiator 25 and is blown into the bathroom BR from the blowout port 22 as warm air.

  A filter 27 is mounted on the upper side of the suction port 21. Then, an inlet / outlet port 27b in which the handle 27a at the side end of the filter 27 is accommodated is formed in a portion between the suction port 21 and the outlet port 22 of the lower surface cover 1b, and the filter 27 can be inserted and removed through the inlet / outlet port 27b. Yes.

  The mist device 3 includes a mist nozzle 31 disposed at a portion adjacent to the other side in the lateral direction of the outlet port 22 of the lower surface cover 1b, and a mist water channel 32 for supplying tap water to the mist nozzle 31. A water filter 33, a water supply source electromagnetic valve 34, a check valve 35, a liquid heat exchanger 36, a mist temperature sensor 37, and a mist electromagnetic valve 38 are interposed in the mist water channel 32 in order from the upstream side. A sub-heat medium circulation path 36 a branched from the main heat medium circulation path 26 is connected to the liquid heat exchanger 36. A flow rate adjusting valve 36b is interposed in the auxiliary heat medium circulation path 36a. Then, the heat medium is supplied to the liquid-liquid heat exchanger 36 by opening the flow rate adjusting valve 36b, and the water flowing in the mist water channel 32 is heated by the heat of the heat medium and supplied to the mist nozzle 31 as hot water. The hot water mist sprayed from the mist nozzle 31 is supplied into the bathroom BR on the warm air blown from the outlet 22. Further, the supply flow rate of the heat medium to the liquid heat exchanger 36 is controlled by the flow rate adjusting valve 36b so that the temperature detected by the mist temperature sensor 37 becomes a predetermined set temperature.

  The pouring hot water device 4 includes a pouring hot water nozzle 41 disposed facing a through hole 21 c formed in a closing plate portion 21 b that closes a part of the suction port 21, and a hot water supply heat exchanger 51 of the heat source unit 5. A hot water supply channel 42 branched from a hot water supply channel 51b connected to the outlet of the hot water supply heat exchanger 51 for supplying hot water heated in step S to the hot water nozzle 41 is provided. Then, hot water is applied to the bathtub BT as shown in FIG. Note that a blindfold plate 41a is connected to the hammered hot water nozzle 41 to prevent the inside of the heater main body 1a from being seen through the through hole 21c. Further, a hot-water tap (not shown) disposed in the home is connected to the downstream end of the hot water outlet 51b.

  A water filter 43, a water amount adjusting valve 44, a hot water temperature sensor 45, and a hot water solenoid valve 46 are provided in the hot water channel 42 in order from the upstream side. The tapping hot water device 4 further includes a drainage channel 47 branched from a portion of the tapping hot water channel 42 between the tapping hot water temperature sensor 45 and the tapping hot water solenoid valve 46. A drain electromagnetic valve 48 is interposed. The water from the drainage channel 47 is drained to one corner of the washing place BRa of the bathroom BR.

  Further, a portion of the mist water channel 32 between the mist temperature sensor 37 and the mist electromagnetic valve 38 is connected to a branch portion of the drainage channel 47 of the tapping hot water channel 42 through a communication channel 39. When the mist operation for spraying warm water from the mist nozzle 31 is stopped, the drain electromagnetic valve 48 is opened so that the residual water in the mist water channel 32 is drained through the drain channel 47.

  The circulation fan 24, the heating medium valve 26b, the water supply source solenoid valve 34, the flow rate adjustment valve 36b, the mist solenoid valve 38, the water amount adjustment valve 44, the simmering hot water solenoid valve 46 and the drainage solenoid valve 48 are shown in FIG. As shown, the controller 6 is controlled by a controller 6 provided in the bathroom heater 1. A remote controller 7 for a bathroom heater is connected to the controller 6. The remote controller 7 includes a heating switch 71, a mist switch 72, a hot water switch 73, a stop switch 74, an up / down switch 75 that variably sets the heating temperature, the amount of hot water, and the like, a high temperature drain switch 76, a drainage display 77a, etc. A display 77 and a speaker 78 having various displays and a liquid crystal display unit 77b for selecting and displaying time, heating set temperature, amount of set hot water, and the like are provided.

  When the heating switch 71 is turned on, an operation command is sent from the controller 6 to the heat source unit 5, the circulation pump 26a and the heating burner 52a are operated, and the heating medium valve 26b is opened, and the radiator The heating medium heated by the heating heat exchanger 25 is supplied to 25, and the circulation fan 24 is operated to perform a heating operation in which warm air is blown into the bathroom BR.

  When the mist switch 72 is turned on, the same control as in the heating operation described above is performed and the flow rate adjustment valve 36b is opened so that the heat medium heated by the heating heat exchanger 25 is supplied to the liquid heat exchanger 36. Further, the water supply source electromagnetic valve 34 and the mist electromagnetic valve 38 are opened, and a mist operation is performed in which hot water heated by the liquid-liquid heat exchanger 36 is sprayed from the mist nozzle 31.

  When the tapping hot water switch 73 is turned on, the tapping hot water solenoid valve 46 is opened, and a tapping hot water operation is performed in which hot water heated by the hot water supply heat exchanger 51 is dropped from the hot water nozzle 41. Here, the hot water temperature can be variably set up to a maximum of 60 ° C. with a hot water remote controller (not shown). And when hot water supply temperature is accidentally set to high temperature, hot hot water may fall to a bather. Therefore, in this embodiment, the hot water control shown in FIG. 4 is performed by the controller 6.

  In the hot water control, first, it is determined whether or not the hot water switch 73 is turned on in STEP1, and when it is turned on, the drain electromagnetic valve 48 is opened in STEP2 to prevent cold water from falling. The initial drainage is performed. Then, it is determined whether or not the detected temperature T of the hot water temperature sensor 45 applied in STEP 3 is equal to or lower than a predetermined lower limit temperature (for example, 30 ° C.) YTL. If T ≦ YTL, this state is maintained in STEP 4 for a predetermined time. It is determined whether or not (for example, 3 minutes) has continued. When the state of T ≦ YTL continues for a predetermined time, it is determined that there is an abnormality in the heat source unit 5, the drainage electromagnetic valve 48 is closed in STEP 5, and this is notified by the speaker 77.

  If T> YTL within a predetermined time, the process proceeds to STEP 6 and it is determined whether or not the detected temperature T of the hot water temperature sensor 45 is lower than a predetermined upper limit temperature YTH (for example, 47 ° C.). When T <YTH, the start of the hot water poured from the speaker 77 is notified at STEP 7 and then the hot water electromagnetic valve 46 is opened at STEP 8 and the drainage electromagnetic valve 48 is closed. As a result, hot water having an appropriate temperature heated by the hot water supply heat exchanger 51 falls from the hot water nozzle 41 while being adjusted to the set water amount by the water amount adjusting valve 44.

  Next, in STEP 9, it is determined whether or not the stop switch 74 is turned on. Until it is turned on, the process returns to STEP 6 and the above-described processing is repeated. Although not shown, in this case, notification in STEP 7 is not performed. When the stop switch 74 is turned on, the hot water solenoid valve 46 is closed in STEP 10 to finish the hot water operation, and then the process returns to STEP 1.

  If it is determined in STEP 6 that T ≧ YTH, the process proceeds to STEP 11 and whether the detected temperature T of the hot water temperature sensor 45 is lower than a predetermined dangerous temperature YTK (for example, 52 ° C.) set higher than the upper limit temperature YTH. Determine whether or not. When YTH ≦ T <YTK, it is determined in STEP 12 whether or not this state has continued for a predetermined first waiting time tm1 (for example, 10 seconds). If T ≧ YHK, the process proceeds to STEP13. It is determined whether or not this state has continued for a predetermined second waiting time tm2 (for example, 2 seconds) set shorter than the first waiting time tm1.

  When the state of YTH ≦ T <YTK continues for the first waiting time tm1, or when the state of T ≧ YTK continues for the second waiting time tm2, the tapping hot water solenoid valve 46 is closed at STEP 14 Stop hot water operation. Next, in STEP 15, the drainage display 77 a of the display 77 is blinked to prompt the bather to operate the high temperature drainage switch 76. Then, it is determined whether or not the high temperature drain switch 76 is turned on in STEP 16, and when it is turned on, a warning sound for notifying that the high temperature drain is performed by the speaker 78 is generated in STEP 17, and the drain solenoid valve 48 is set. Open the valve. As a result, high-temperature residual water in the tapped hot water channel 42 is drained through the drain channel 47.

  Next, in STEP 18, it is determined whether or not YTL ≦ T <YTH. If YTL ≦ T <YTH, it is determined in STEP 19 whether or not this state has continued for a predetermined time (for example, 5 seconds). To do. Then, when the state of YTL ≦ T <YTH continues for a predetermined time, the drain electromagnetic valve 48 is closed at STEP 20 and the generation of the warning sound is stopped, and then the process returns to STEP 1.

  According to the hot water control of the present embodiment, when the temperature of the hot water from the hot water supply heat exchanger 51 becomes equal to or higher than the upper limit temperature YTH, the hot water solenoid valve 46 is closed and the hot water nozzle 41 is supplied to the hot water nozzle 41. Hot water supply is shut off. Therefore, even if the hot water supply temperature is mistakenly set to a high temperature, the hot hot water does not fall from the hot water nozzle 41. However, simply closing the hammered hot water solenoid valve 41, after the hammered hot water is stopped, when the user resets the hot water supply temperature again and restarts the hammered hot water operation, the hammered hot water channel. There is a possibility that hot hot water remaining in 42 will fall from the hot water nozzle 41. On the other hand, in this embodiment, when the temperature of the hot water from the hot water supply heat exchanger 41 becomes equal to or higher than the upper limit temperature YTH, the hot water solenoid valve 46 is closed in the hot water stop processing from STEP 14 to STEP 20. In addition, since the drainage electromagnetic valve 48 is opened until the temperature detected by the tapping hot water temperature sensor 45 falls below the upper limit temperature YTH, the hot residual water in the tapping hot water channel 42 is drained through the drainage channel 47. The Therefore, it is possible to prevent the hot residual water from dropping from the hot water nozzle 41 when restarting the hot water operation, which is safe. Since the process does not return to STEP 1 until the drainage is completed after proceeding to STEP 20, even if the tapping hot water switch 73 is turned on during the drainage, the tapping hot water operation is not resumed.

  By the way, if the water from the drainage channel 47 is drained to the washing place BRa of the bathroom BR, if the high-temperature water is drained carelessly from the drainage channel 47, there is a risk that the bather may feel hot. On the other hand, in the present embodiment, the drain electromagnetic valve 48 is not opened unless the bather performs a manual operation for instructing drainage, that is, an on operation of the high temperature drain switch 76. Therefore, it is possible to prevent hot water from being inadvertently drained from the drainage channel 47 to be hot. Further, when the drain electromagnetic valve 48 is opened, a warning sound for notifying that high temperature drainage is performed is generated by the speaker 78 serving as a notification means, so that the bather can be further alerted.

  Further, in the present embodiment, when the predetermined waiting time elapses when the detected temperature T of the hot water temperature sensor 45 becomes equal to or higher than the upper limit temperature YTH, the hot water hot water stop processing of STEP14 or lower is executed. This waiting time is set to a relatively long first waiting time tm1 when the detected temperature T is equal to or higher than the upper limit temperature YTH and lower than the dangerous temperature YTK, and when the detected temperature T becomes equal to or higher than the dangerous temperature YTK, A relatively short second waiting time tm2 is set. Thus, since the waiting time is set shorter as the detected temperature T becomes higher, it is possible to prevent unnecessary interruption of the hot water when the temperature of the hot water from the hot water supply heat exchanger 51 temporarily changes from the appropriate temperature, In addition, when the hot water temperature is significantly increased, the hot water can be quickly stopped to ensure safety.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to this. For example, in the above-described embodiment, the waiting time until the pouring hot water stop processing when the detected temperature T of the pouring hot water temperature sensor 45 is equal to or higher than the upper limit temperature YTH is the first waiting time tm1 and the second waiting time tm2. Although it is variably set in two steps, the waiting time is variably set in three or more steps according to the rise in the detected temperature T, or infinitely so that it becomes shorter in inverse proportion to the rise in the detected temperature T. It may be variably set.

  In the above embodiment, after the hot water stop process is completed and the drain electromagnetic valve 48 is closed in STEP 20, the process returns to STEP 1, and the hot water operation is resumed when the hot water switch 73 is turned on again. However, it is also possible to return to STEP 7 from STEP 20 and automatically restart the hot water operation. Moreover, although the said embodiment applies this invention to the tapping hot water apparatus 4 attached to the bathroom heater 1, this invention is similarly applied to the tapping hot water apparatus provided separately from the bathroom heater 1. The invention can be applied.

  BT ... Bath, 4 ... Take hot water device, 41 ... Take hot water nozzle, 42 ... Take hot water channel, 45 ... Take hot water temperature sensor, 46 ... Take hot water solenoid valve, 47 ... Drain channel, 48 ... Drain electromagnetic Valves, 5 ... Heat source machine, 51 ... Heat exchanger for hot water supply, 6 ... Controller (control means), 7 ... Remote control for bathroom heater, 73 ... Hot water switch, 76 ... High temperature drain switch, 78 ... Speaker (notification means) ).

Claims (2)

A hot water hot water device provided with a hot water nozzle that drops hot water heated by a heat exchanger for hot water supply of a heat source machine into a bathtub,
A basin hot water solenoid valve interposed in the basin hot water channel for supplying hot water from a heat exchanger for hot water supply to the basin hot water nozzle;
A drainage channel branched from a portion of the tapping hot water channel upstream of the tapping hot water solenoid valve,
A drain solenoid valve interposed in the drainage channel;
A tapping hot water temperature sensor that detects the temperature of hot water at a portion of the tapping hot water channel upstream of the branch point of the drainage channel;
Control means for controlling the opening and closing of the hammered solenoid valve and the drain solenoid valve,
The control means opens the simmering hot water solenoid valve and drops the hot water from the simmering hot water nozzle, and when the temperature detected by the simmering hot water temperature sensor exceeds a predetermined upper limit temperature, Stops the hot water solenoid valve and closes the hot water solenoid valve to open the drainage solenoid valve. When the detected temperature of the hot water temperature sensor falls below the upper limit temperature, the drain electromagnetic valve is closed. Composed of
Furthermore, the control means is configured to open the drain electromagnetic valve when a manual operation for instructing drainage is performed in the hot water stop processing.   2. The hot water hot water device according to claim 1, wherein the control means is configured to operate a notifying means for notifying that drainage is performed when the drain electromagnetic valve is opened.

Images