JP6043317B2 - Hot spring water supply system - Google Patents

Description

  The present invention relates to a hot spring hot water supply system that supplies hot spring water having an optimum hot water temperature to a plurality of bathtubs by so-called flowing water.

  Conventionally, as this kind of hot spring hot water supply system, a hot spring pouring fully automatic device described in Patent Document 1 is known.

  The fully automatic hot water pouring device of Patent Document 1 uses hot spring water having a high water temperature of 55 to 60 ° C., and includes a bathtub and a valve for hot spring water provided in a hot water supply pipe for supplying hot spring water to the bathtub. A cold water valve provided in a cold water pipe for supplying cold water to the water, a drain valve provided in a drain pipe connected to the bottom of the bathtub, and a water level sensor for detecting a low water level and a high water level in the bathtub A temperature sensor for detecting the hot water set value and the low temperature set value of the hot water in the bathtub, a remote control that has a temperature adjustment switch and a hot water switch operated by the bather during bathing, and sends a command signal to the control panel; And a control panel (control unit) that controls opening and closing of three valves, a source water valve, a cold water valve, and a drain valve, by inputting a signal from the sensor or a signal from a sensor and performing feedback control. .

  The above-mentioned full-automatic hot-spring apparatus has a control panel that uses a source water valve and a chilled water for each bathtub based on signals from a plurality of sensors attached to each bathtub and signals from a plurality of switches on the remote control. By controlling the opening and closing of the three valves, the valve and the drainage valve, so that the required valve opening degree is reached, the hot water having an appropriate temperature and an appropriate temperature is automatically supplied by pouring the source into the bathtub.

JP 2008-100018 A

  However, the hot spring pouring fully automatic device described in Patent Document 1 does not touch on the amount of hot spring water, uses hot spring water with a high water temperature of 55 to 60 ° C., and is applicable only to one bathtub. It cannot be applied to a plurality of bathtubs in which the required hot water supply flow rate and the required heat amount change.

  In addition, in this fully automatic hot-spring device, the control panel controls the source water valve, the cold water valve, and the drain valve based on the signals of the sensors attached to the bathtub and the signals of the switches of the remote control. The three valves must be controlled to open and close to the required valve opening, and since one of the valves is constantly controlled, there is no power saving, so the management costs for hot water supply are high, There is a problem that it is difficult to control with a control panel corresponding to a disturbance affecting the temperature of the bathtub.

  In addition, this fully automatic hot water pouring apparatus is not a pouring hot spring with 100% source water because the hot spring water and cold water are mixed and filled with hot water.

  In addition, this hot spring pouring fully automatic device can be operated with the temperature adjustment switch of the remote control so that the hot water filling temperature and the hot water pouring temperature become the appropriate temperature, and it cannot be adjusted to increase the flow rate and shorten the hot water filling time. .

  Therefore, the present invention has been made to solve the above-described problems, and can be applied not only to a single bathtub, but also to a plurality of bathtubs in which the required hot water supply flow rate and the required heat amount are changed, and is 100% hot spring. A hot spring hot water supply system that can perform hot water filling at a suitable temperature in a short period of time, with a minimum of necessary valve opening / closing control and less influence of disturbances that affect the temperature of the bathtub. The purpose is to do.

  In order to solve the above problems, the hot spring water supply system according to the present invention includes (1) a source tank that stores the source water, a constant pressure water pump that pumps the source water stored in the source tank and supplies the source water at a constant pressure, The source water supplied by the constant pressure feed water pump is passed through the secondary side heat exchange element, and the heat medium liquid is passed through the primary side heat exchange element, thereby giving the source water hot or cold to an appropriate temperature. It has a heat exchanger as hot spring water, a heat medium liquid generating means and a circulation pump driven by an inverter motor, and heat medium liquid is introduced into the primary heat exchange element of the heat exchanger by the circulation pump. Introduce heat medium liquid generation and circulation equipment that supplies hot or cold heat to the source water that is circulated and circulated to the secondary heat exchange element, and the appropriate temperature hot spring water that flows out from the heat exchanger. Pressure From a header for proper temperature hot spring water to be determined, a plurality of bathtubs, a flow adjustment valve for hot water filling provided in a hot water supply pipe supplying hot water to each bathtub from the header for optimum temperature hot spring water, and a drain outlet at the bottom of each bathtub A drainage flow rate adjusting valve for draining hot water to the outside, a disinfecting water supply facility for storing a bactericidal agent and supplying a disinfecting water containing the bactericidal agent, the inverter motor, and a flow rate adjusting valve for hot water filling, A control unit for controlling the drainage flow regulating valve, and when the hot water is filled in the bathtub, the control unit uses the frequency of the inverter motor, the required hot water supply flow rate and the required heat amount of the bathtub to be used. By performing variable control at a predetermined frequency corresponding to the above, the heat exchange amount of the heat exchanger is controlled to increase / decrease, and the drainage flow adjustment valve is fully closed or close to being fully closed at the start of filling the bathtub Closed to state and before The degree of opening of the hot water flow adjustment valve is controlled to increase, and when the hot water reaches a predetermined liquid level, the hot water flow rate is lowered until the hot water flow rate becomes a required hot water amount that does not lower the hot water temperature. The degree of opening of the flow rate adjusting valve for water is reduced, and the degree of opening of the flow rate adjusting valve for drainage is increased so that the drainage flow rate is maintained without being lowered. After the completion, the liquid supply means of the disinfecting water supply facility is controlled so as to supply disinfecting water from the disinfecting water supply facility to the source tank, and after disinfection, the first mixing flow adjustment valve and the second It is the structure which controls so that the flow regulating valve for mixing may be opened.

  With the above configuration, the hot spring hot water supply system of the present invention passes the hot spring water stored in the hot spring tank through the heat exchanger to make the hot spring water at the proper temperature, and then introduces it into the header for the hot spring water at the proper temperature to further balance the pressure. Can be hot-watered in multiple bathtubs and bathed in a 100% source water.

  Moreover, the hot spring hot water supply system of this invention by the said structure changes the number of the bathtubs to be used input and set to a control part, when the hot water supply system of this invention is filled with a bathtub, The secondary side heat exchange element of a heat exchanger is changed. Even if the flow rate of the source water flowing through is changed, the control unit variably controls the inverter motor to a predetermined frequency corresponding to the number of bathtubs, and the heat transfer fluid that flows through the primary heat exchange element of the heat exchanger Therefore, the heat exchange amount of the heat exchanger is controlled to increase or decrease, so that the required hot water supply flow rate and the required heat amount corresponding to the number of bathtubs to be used can be exchanged. In addition, the hot spring hot water supply system of the present invention increases or decreases the amount of heat exchange of the heat exchanger even if the target temperature of the hot water input and set in the control unit is changed. The inverter motor can be variably controlled to a predetermined frequency to perform heat exchange corresponding to the hot water temperature. Therefore, even if the number of bathtubs to be used changes, hot water can be supplied to a plurality of bathtubs as appropriate temperature hot spring water suitable for bathing.

  In addition, with the above-described configuration, the hot spring water supply system of the present invention is configured so that the control unit fully closes or fully closes the drainage flow rate adjustment valve from the start of hot water filling to the bathtub until the hot water reaches a predetermined liquid level. Therefore, the hot water filling flow rate adjusting valve is controlled to increase the degree of opening, so that hot water can be supplied to a liquid level that allows bathing in a short hot water filling time.

Further, in the hot spring hot water supply system of the present invention, when the hot water reaches a predetermined liquid level, the control unit reduces the degree of opening of the hot water flow regulating valve and opens the drain flow regulating valve. Since the control is performed to increase the valve degree, the hot water supply flow rate can be lowered to a required hot water amount that does not lower the hot water temperature, and the drainage flow rate can be maintained without being lowered to maintain the pouring state. Bathing is possible with 100% source flow at bathing temperature.
Furthermore, the hot spring hot water supply system according to the present invention can supply the disinfecting water supplied from the disinfecting water supply facility to the entire piping system after the last bathing of the day, and supply it to the bathtub. Bacteria control (suppresses the growth of various bacteria) can be performed, and the next day's operation can be prepared.

  The hot spring hot water supply system according to the present invention is the hot spring hot water supply system according to (1), wherein (2) the control unit fills the bathtub with the target liquid temperature at the predetermined liquid level. As the bath target temperature is set, the loss temperature that is the difference between the bath target temperature and the temperature of the hot water when the bath is filled with the predetermined liquid level is set. The frequency of the inverter motor is set so that the hot water supply outlet temperature of the heat exchanger matches the hot water supply target temperature as the hot water supply target temperature that is the temperature obtained by adding the bathtub target temperature and the loss temperature. It is good also as a structure which controls.

  Here, the input of the bath target temperature and the loss temperature to the control unit may be configured to input numerical values based on data obtained in advance through a hot water filling experiment, or the temperature, humidity, solar radiation, wind speed, and black bulb temperature may be input. It is good also as a structure which is equipped with the various sensors to detect and a control part inputs these sensor signals, and calculates bathtub target temperature and loss temperature with a predetermined | prescribed heat calculation formula.

  With this configuration, in the hot spring hot water supply system according to the present invention, when the bathtub target temperature and the loss temperature are set in the control unit, the outlet temperature of the appropriate hot spring water of the heat exchanger is a temperature obtained by adding the bathtub target temperature and the loss temperature. Since the frequency of the inverter motor is controlled so as to coincide with the target temperature, the hot water becomes the bath target temperature at the same time as the hot water filling is completed, so that bathing can be performed under optimum temperature conditions.

  In addition, with this configuration, the hot spring hot water supply system according to the present invention can be bathed at an optimum temperature simultaneously with the completion of the filling, and eliminates overshoot of the bath temperature and temperature control failure, waits for the temperature adjustment time, By eliminating the correction, the rotation rate of the equipment can be improved and energy saving control can be realized.

  The hot spring hot water supply system according to the present invention is the hot spring hot water supply system according to (1) or (2), wherein (3) the control unit completes the hot water filling in the same target hot water filling time for all the bathtubs. As described above, the opening degree of the hot water flow adjustment valve for each bathtub is stored in advance in the storage unit, and when there is a request for use of any of the bathtubs, It is good also as a structure which controls so that the valve opening degree of the said flow rate adjustment valve for hot water filling of the said bathtub may correspond with the said valve opening degree memorize | stored in the said memory | storage part.

  With this configuration, in the hot spring hot water supply system according to the present invention, the hot water filling is completed in the same target hot water filling time regardless of the size of the bathtub. Thereby, if the target hot water filling time is set to 40 minutes in the control unit, for example, both of the one bathtub having a capacity of 1 cubic meter and the other bathtub having a capacity of 2 cubic meters are filled with 40 minutes. Hot water filling is completed at the time when the time has elapsed, and the same bath target temperature is obtained in any of the baths, so that the time management of the bathing timing can be made the same.

  The hot spring hot water supply system according to the present invention is the hot spring hot water supply system according to any one of the above (1) to (3), wherein (4) a pressure is introduced by introducing a part of the source water supplied by the constant pressure water supply pump. A header for the source water to be stabilized, and a first flow rate adjusting valve for mixing provided in the hot water supply pipe leading the appropriate temperature hot spring water flowing out from the header for the appropriate temperature hot spring water to the flow rate adjusting valve for hot water filling, A merging conduit for joining the source water flowing out from the source water header to the hot water pipe guiding the appropriate temperature hot spring water flowing out from the first mixing flow rate adjusting valve to the hot water flow rate adjusting valve; And a second mixing flow regulating valve provided in the merge pipe, wherein the control unit requires a small amount of heat for the bathtub to be used, and drives the inverter motor at 1/10 of the rated frequency. Even if the heat exchanger is In the condition where heat exchange exceeding the required heat quantity of the tank is performed, the opening degree of the first mixing flow rate adjustment valve and the opening of the second mixing flow rate adjustment valve are set so that the mixed water has an appropriate temperature. The degree of correlation may be controlled.

  With this configuration, the hot spring hot water supply system according to the present invention uses only one bathtub and has a small capacity, so even if it is driven at 1/10 of the rated frequency as the minimum frequency at which the inverter motor can be driven, If the flow rate of the heat transfer fluid is too high in the primary heat exchange element of the heat exchanger, the heat transfer amount of the heat exchanger becomes excessive, and the hot spring water temperature at the outlet deviates from the appropriate bathing temperature, the control unit The first mixing flow rate adjustment valve and the second mixing flow rate adjustment valve are each controlled to have a predetermined valve opening degree. As a result, the hot spring water that has been transferred by the heat exchanger and the source water that passes through the header water source without passing through the heat exchanger are mixed in a predetermined ratio, but is 100% source water, Hot water filling can be performed at a temperature suitable for bathing.

  In addition, with this configuration, the hot spring hot water supply system according to the present invention operates the inverter so that the heat exchanger is used at the maximum efficiency point when the amount of hot water supply is large, while the flow rate of the hot water supply decreases and the load of the heat exchanger is reduced. When it becomes lighter and the secondary outlet temperature of the heat exchanger reaches a predetermined high temperature, the hot / cold water mixing control system automatically mixes cold water to maintain the hot water supply target temperature and becomes hot at light load It compensates for the shortcomings of the heat medium liquid circulation inverter control of the heat exchanger and has both energy saving and safety.

  The hot spring hot water supply system according to the present invention may be configured such that in the hot spring hot water supply system according to any one of the above (1) to (6), (7) the heating medium liquid generating means is a hot water boiler.

  In the hot spring hot water supply system according to the present invention in this configuration, the temperature of the source water is lower than a suitable temperature for bathing, for example, 42 ° C., and the source water is required to heat the source water before filling the bathtub. It is applied to hot spring facilities using no source water. In this hot spring hot water supply system, hot water heated by a hot water boiler is passed through the primary heat exchange element of the heat exchanger, and the temperature of the hot spring water at the outlet of the secondary heat exchange element of the heat exchanger is, for example, When the hot water filling is completed by exchanging heat so that the temperature becomes 44 ° C., the hot water can be filled to be, for example, 42 ° C. suitable for bathing.

  The hot spring hot water supply system according to the present invention may be configured such that in the hot spring hot water supply system according to any one of the above (1) to (6), (8) the heating medium liquid generating means is a cold water generating device. As this cold water generating device, for example, cooling water that is cooled by passing it through a cooling tower or a coil laid in the river is passed through the primary coil, and cold water is passed through the secondary coil so that The cooling water may be circulated through the primary coil of the heat exchanger, and a pump for circulating the cooling water may be driven by an inverter motor to vary the circulation amount of the cooling water.

  The hot spring hot water supply system according to the present invention in the case of this configuration uses the source water of the source well where the temperature of the source water is, for example, 50 to 60 ° C. and the source water needs to be cooled before filling the bathtub. Applicable to hot spring facilities. In this hot spring hot water supply system, the temperature of the hot spring water at the outlet of the secondary heat exchange element of the heat exchanger is made to flow through the primary heat exchange element of the heat exchanger through the cold water cooled by the cold water generator, for example. When the hot water filling is completed by exchanging heat so that the temperature becomes 44 ° C., the hot water can be filled to be, for example, 42 ° C. suitable for bathing.

  According to the present invention, not only can it be applied to a single bathtub, but it can also be applied to a plurality of bathtubs in which the required hot water supply flow rate and required heat amount are changed, 100% hot spring pouring is performed, and valve opening / closing control is performed with the minimum necessary. The influence of disturbance affecting the temperature of the bathtub is less than that of conventional ones, and it is possible to perform hot water filling at a suitable temperature in a short time, and disinfection supplied from the disinfecting water supply facility after the last bathing of the day To provide a hot spring hot water supply system that can supply water to the bathtub by allowing water to flow through the entire piping system, control bacteria in the bathtub, etc. (suppress the growth of germs), and prepare for operation the next day be able to.

It is a schematic block diagram of the hot spring hot water supply system which concerns on 1st Embodiment. It is an expanded block diagram of the heat-medium liquid production | generation circulation equipment of the heat exchanger of the hot spring hot water supply system which concerns on 1st Embodiment. It is an operation | movement flowchart which shows the operation | movement at the time of the "operation start" of the control part of the hot spring hot water supply system which concerns on embodiment of this invention. It is an operation | movement flowchart which shows the operation | movement at the time of the "inverter control driving | operation" of the control part of the hot spring hot water supply system which concerns on embodiment of this invention. It is an operation | movement flowchart which shows the operation | movement at the time of the "mixed valve control driving | operation" of the control part of the hot spring hot water supply system which concerns on embodiment of this invention. It is an operation | movement flowchart which shows the operation | movement at the time of the "disinfection water driving | operation" of the control part of the hot spring hot water supply system which concerns on embodiment of this invention.

  Hereinafter, an embodiment of a hot spring hot water supply system according to the present invention will be described with reference to the drawings.

(First embodiment)
First, the configuration of the hot spring hot water supply system 1 according to the first embodiment will be described. As shown in FIG. 1, the hot spring hot water supply system 1 in this embodiment is a hot spring hot water supply system that can perform both “inverter control operation” and “mixed valve control operation”.

  The hot spring hot water supply system 1 is roughly a facility necessary for the “inverter control operation”, and is roughly divided into a source tank 11, a constant pressure water supply pump 12, a first flow meter 13, a heat exchanger 14, and a heat transfer fluid generation. There are a plurality of (four in the figure) a circulation facility 15, a header 16 for appropriate temperature hot spring water, and hot water filling flow control valves 18 A, 18 B, 18 C, 18 D provided in the hot water supply pipes 17 A, 17 B, 17 C, 17 D, respectively. Bathtubs 19A, 19B, 19C, and 19D having different capacities, drainage flow regulating valves 21A, 21B, 21C, and 21D provided in the drain pipes 20A, 20B, 20C, and 20D, and a controller 22 are provided. Yes.

  The hot spring hot water supply system 1 includes a second flow meter 23 and a source water source header as a necessary equipment for the “mixing valve control operation” in addition to the above equipment required for the “inverter control operation”. 24, the first mixing flow control valves 25A, 25B, 25C, 25D provided in the hot water supply pipes 17A, 17B, 17C, 17D and the merging pipes 26A, 26B, 26C, 26D, respectively. And second mixing flow regulating valves 27A, 27B, 27C, and 27D.

  Here, the “inverter control operation” is a state in which the first mixing flow rate adjustment valves 25A, 25B, 25C, and 25D are fully opened and the second mixing flow rate adjustment valves 27A, 27B, 27C, and 27D are fully closed. In this operation, the whole amount of the source water pumped from the source tank 11 by the constant pressure water supply pump 12 is passed through the heat exchanger 14 and the temperature of the source water of the heat exchanger 14 is adjusted to the hot water supply target temperature.

  More specifically, in the “inverter control operation”, the control unit 22 variably controls the frequency applied to the inverter motor 15 d, whereby the flow rate of the heat transfer fluid flowing through the primary heat exchange element 14 a of the heat exchanger 14. Is changed so as to correspond to a change in the flow rate of the source water flowing through the secondary side heat exchange element 14b of the heat exchanger 14, and thereby the appropriate temperature hot spring water flowing out from the outlet of the secondary side heat exchange element 14b. In this operation, hot water is supplied to the bathtubs 19A, 19B, 19C, and 19D as a hot water supply target temperature that is a temperature obtained by adding the bath target temperature and the loss temperature.

  That is, the “inverter control operation” is an operation in which hot water is supplied to the bathtubs 19A, 19B, 19C, and 19D as an appropriate temperature hot spring water of 100% source water only by heat exchange in the heat exchanger 14. As a specific example of the “inverter control operation”, among the four bathtubs 19A, 19B, 19C, and 19D shown in FIG. 1, an operation other than the operation in the case of using only the minimum-capacity bathtub 19C described later for bathing is performed.

  The “mixing valve control operation” means that the first mixing flow rate adjustment valves 25A, 25B, 25C, and 25D are opened to a required valve opening, and the second mixing flow rate adjustment valves 27A, 27B, 27C, 27D is opened to the required valve opening, and a part of the source water pumped from the source tank 11 by the constant pressure feed water pump 12 is passed through the heat exchanger 14 and the appropriate temperature hot spring water header 16, and the remaining source water is sourced. It is made to flow through the water header 24, and further on the downstream side corresponding to each of the first mixing flow control valves 25A, 25B, 25C, 25D and the second mixing flow control valves 27A, 27B, 27C, 27D. This is an operation in which hot spring water is supplied to the bathtubs 19A, 19B, 19C, and 19D as appropriate temperature hot spring water by merging the source water flowing through different systems. The “mixing valve control operation” is a state where the frequency in the “inverter control operation” is fixed to, for example, one tenth of the rated frequency, and the first mixing flow control valves 25A, 25B, 25C, and 25D are fully opened. The second mixing flow rate adjusting valves 27A, 27B, 27C, 27D are adjusted to adjust the temperature while maintaining the same, or the first mixing flow rate adjusting valves 25A, 25B, 25C, 25D and the second This is a control operation for adjusting the temperature by adjusting the opening degree of the mixing flow regulating valves 27A, 27B, 27C, and 27D.

  In the present embodiment, “mixing valve control operation” is an operation when only one of the bathtubs 19A, 19B, 19C, and 19D is used. In the case of using only one bathtub, the flow rate of the heat transfer fluid flowing through the primary side heat exchange element 14a of the heat exchanger 14 is reduced so that the heat exchange amount in the heat exchanger 14 is reduced. To drive.

  The rotational speed of the circulation pump 15c driven by the inverter motor 15d is proportional to the amount of liquid fed by the circulation pump 15c. Since the rotation speed of the circulation pump 15c and the discharge pressure are in a square relationship, the inverter motor 15d is an inductive load. Therefore, if the voltage is constant, the current increases as the frequency decreases. When the rotational speed of the circulation pump 15c is lowered in order to reduce the liquid feeding amount of the circulation pump 15c, the inverter motor 15d is limited so as not to fall below 10% of the rated frequency so that the inverter motor 15d does not burn out due to overcurrent. . This minimizes the amount of heat exchange in the heat exchanger 14. Therefore, inevitably, from the viewpoint of the flow rate control, it cannot be reduced to 10% or less of the maximum flow rate.

  Here, the rated frequency and about one-tenth of the rated frequency are west of Fujikawa, where power is supplied at 60 Hz, the rated frequency is 60 Hz, the tenth frequency is 6 Hz, and power is at 50 Hz. In the east of Fujikawa, where the frequency is supplied, the rated frequency is 50 Hz and the tenth frequency is 5 Hz.

  However, when only one bathtub is used, the heat exchange amount in the heat exchanger 14 is too larger than the necessary heat exchange amount, and the temperature of the hot spring water in the secondary heat exchange element 14b is set as the hot water supply target temperature. You may not be able to. When a hot water boiler is used for the heat transfer fluid generation and circulation facility 15, the temperature of the hot spring water in the secondary heat exchange element 14b is higher than the target hot water supply temperature, and the heat transfer fluid generation and circulation facility 15 has a cold water generator. Is used, the temperature of the hot spring water in the secondary heat exchange element 14b is lower than the target hot water supply temperature. Therefore, “mixing valve control operation” is performed.

  A specific example of the “mixing valve control operation” is, for example, a case where only the minimum capacity bath 19C in FIG. 1 is used. In addition, since the "inverter control operation" can be applied when the capacity is large even if only one bathtub is used, for the bathtub, the first mixing flow control valve, the merging pipeline, and the second No mixing flow control valve is required. Each of the four bathtubs 19A, 19B, 19C, and 19D shown in FIG. 1 has a small capacity when only one is used, and is configured so that “mixed valve control operation” can be applied. If the flow rate of the secondary hot water in the heat exchanger decreases in the “inverter control operation” state where the flow rate of the primary heat transfer water in the heat exchanger is 10%, the hot water supply temperature may rise to 50 ° C. or higher. Also at this time, switching from “inverter control operation” to “mixing valve control operation” is performed.

  The details will be described below.

  The source tank 11 stores the source water pumped up by a pump 30 installed in the source well 29. In the case where a large amount of source water springs out from the source well 29, the source water may be introduced into the source tank 11.

  The constant pressure feed water pump 12 pumps the source water stored in the source tank 11 through the pipe 32 and feeds it through the pipe 33 at a predetermined constant pressure. The feed direction end of the pipe 33 is connected to the inlet of the secondary heat exchange element 14 b of the heat exchanger 14. The pipe 34 is branched from the middle of the pipe 33, and the feed direction end of the pipe 34 is connected to the inlet 24 a of the source water header 24.

  Accordingly, the constant pressure feed water pump 12 is configured to supply the source water through the pipe 33 to the heat exchanger 14 during the “inverter control operation” and during the “mixing valve control operation”. The source water is supplied to the heat exchanger 14 through the pipe 33 and is supplied to the source water header 24 through the pipe 34.

  The supply pressure of the constant-pressure feed water pump 12 supplies hot water to the four bathtubs 19A, 19B, 19C, and 19D at the maximum flow rates, respectively, with the valve openings of the hot water filling flow rate adjustment valves 18A, 18B, 18C, and 18D being maximized. Even in such a case, the flow rate is set (designed) so that the hot water can be supplied with sufficient momentum. If the number of installed bathtubs is many times greater, a constant pressure feed water pump 12 having a corresponding feed pressure is installed.

  As shown in FIG. 2, the heat exchanger 14 causes the source water supplied by the constant pressure feed water pump 12 to flow through the secondary heat exchange element 14b and the heat medium liquid generation circulation through the primary heat exchange element 14a. The heat medium liquid generated in the facility 15 is allowed to flow, and the temperature of the source water is adjusted to be a suitable temperature hot spring water by the heat exchange action between the source water and the heat medium liquid.

  As shown in FIG. 2, the heat medium liquid generation / circulation facility 15 generates a heat medium liquid to be passed through the primary heat exchange element 14 a of the heat exchanger 14. When the temperature of the source water stored in the source tank 11 is as low as 30 to 40 ° C. and the source water is required to be heated to 42 ° C., for example, at a suitable temperature hot spring water, A boiler is adopted, and the hot water generated in the hot water boiler is circulated between the heat exchanger 14 and the temperature of the source water stored in the source tank 11 is as high as 50 to 55 ° C., for example. When it is necessary to cool the water to an appropriate temperature hot spring water of, for example, 42 ° C., a cold water generating device is adopted, and the cold water generated by the cold water generating device is configured to circulate between the heat exchanger 14.

  As described above, the heat medium liquid generation / circulation facility 15 includes the heat medium liquid generation means 15a, which is one of the hot water boiler and the cold water generation apparatus for generating the heat medium liquid, and the heat medium liquid circulation line 15b. And a circulation pump 15c, and circulates the generated heat transfer fluid between the primary side heat exchange element 14a of the heat exchanger 14 and flows through the secondary side heat exchange element 14b of the heat exchanger 14. The hot spring water is heated or cooled by heat transfer. In the heat transfer medium generating and circulating facility 15, which one of the hot water boiler and the cold water generating device is used as the heat transfer medium generating unit 15 a is uniquely determined depending on the temperature of the source water in the source well 29. The chilled water generator has a heat exchange unit having a chilled water coil and a chilled water coil. The chilled water circulating through the heat medium liquid circulation pipe 15b is passed through the chilled water coil, and the circulated cooling water is radiated and cooled by the cooling tower. The structure which cools cold water with a cold water coil by letting it pass through a water coil is employ | adopted. The primary side heat exchange element 14a and the secondary side heat exchange element 14b may be either a coil type or a plate type.

  In addition, the heat medium liquid generation and circulation facility 15 rotates the circulation pump 15c that allows the heat medium liquid to flow through the primary heat exchange element 14a of the heat exchanger 14 regardless of whether a hot water boiler or a cold water generation device is employed. As a drive source, an inverter motor 15d whose rotation speed is variable depending on the frequency is used, and this frequency is controlled by the control unit 22. As a result, the flow rate of the heat transfer fluid flowing through the primary side heat exchange element 14a of the heat exchanger 14 can be made variable in accordance with the change in the flow rate of the source water flowing through the secondary side heat exchange element 14b. Therefore, the amount of heat exchange of the hot spring water flowing through the outlet of the secondary side heat exchange element 14b of the heat exchanger 14 can be made variable so as to be stabilized at, for example, 42 ° C. regardless of the flow rate. The control is such that there is no need to constantly change the degree of opening of the tension flow regulating valves 18A, 18B, 18C, 18D.

  The heat medium liquid generating and circulating equipment 15 is configured to change the flow rate of the heat medium liquid flowing through the secondary heat exchange element 14b of the heat exchanger 14 by driving the circulation pump 15c with the inverter motor 15d so that the rotation speed is variable. The temperature of the source water at the outlet of the primary side heat exchange element 14a of the heat exchanger 14 is flexibly adapted to the flow rate of the source water flowing through the primary side heat exchange element 14a. It functions so that it becomes the hot water supply target temperature which is the temperature which added the loss temperature.

  Here, the bath target temperature is a temperature suitable for bathing, and is specifically 42 ° C., for example. In addition, the loss temperature is the heat dissipation as steam from the start of hot water filling until the appropriate temperature hot spring water reaches a predetermined liquid level, preferably until the time required for the hot water filling to overflow from the edge of the bathtub. It is the temperature that drops due to heat transfer from the bathtub wall to the outside.

  The appropriate temperature hot spring water header 16 has a predetermined capacity and one inlet 16a and four outlets 16b. The optimum temperature hot spring water header 16 receives the optimum temperature hot spring water flowing out from the outlet of the secondary side heat exchange element 14b of the heat exchanger 14 from the inlet 16a to stabilize the pressure, and the optimum temperature hot spring water having the stable pressure is supplied to the four outlets. 16b has a function of distributing and flowing out to the hot water supply pipes 17A, 17B, 17C, and 17D.

  If the number of installed bathtubs is many times larger, the constant-pressure feed water pump 12, the heat exchanger 14, the heat medium liquid generating / circulating facility 15 and the like are installed so as to have a capacity corresponding to that.

  In the illustrated example, four bathtubs 19A, 19B, 19C, and 19D are provided and have different capacities. However, the present invention is not limited to this.

  The hot water supply pipes 17A, 17B, 17C, and 17D are provided so as to guide the appropriate temperature hot spring water from the appropriate temperature hot water header 16 to the bathtubs 19A, 19B, 19C, and 19D to supply hot water. In the middle of each hot water supply pipe 17A, 17B, 17C, 17D, hot water filling flow rate adjusting valves 18A, 18B, 18C, 18D are provided.

  The drain pipes 20A, 20B, 20C, and 20D are connected at one end to drain outlets provided at the bottoms of the bathtubs 19A, 19B, 19C, and 19D, and the other end (not shown) extends to an external discharge part. The used hot water is drained. In addition, an overflow pipe (not shown) that joins the hot water overflowing from the bathtub to the drain pipes 20A, 20B, 20C, and 20D is provided. The drainage flow regulating valves 21A, 21B, 21C, and 21D are provided on the upstream side of the junction with the overflow pipe (not shown) of the drain pipes 20A, 20B, 20C, and 20D.

  The source water header 24 has a predetermined capacity and has one inlet 24a and four outlets 24b in the same manner as the appropriate temperature hot spring water header 16. The source water header 24 receives the source water supplied from the constant pressure water supply pump 12 from the inlet 24a, stabilizes the pressure, and supplies the appropriate temperature hot spring water with stable pressure from the four outlets 24b to the merging pipes 26A, 26B, 26C. , 26D.

  The junction pipes 26A, 26B, 26C, and 26D are connected to the hot water supply pipes 17A, 17B, 17C, and 17D corresponding to the lower ends thereof at positions upstream of the hot water flow control valves 18A, 18B, 18C, and 18D, respectively. The source water flowing out from the source water header 24 is merged with the source water flowing through the hot water supply pipes 17A, 17B, 17C, 17D.

  The first mixing flow control valves 25A, 25B, 25C, and 25D are positioned upstream of the portions of the corresponding hot water supply pipes 17A, 17B, 17C, and 17D that merge with the merge pipes 26A, 26B, 26C, and 26D. Is provided. The second mixing flow regulating valves 27A, 27B, 27C, and 27D are positioned upstream of the portions that merge with the hot water supply pipes 17A, 17B, 17C, and 17D in the corresponding merge pipes 26A, 26B, 26C, and 26D, respectively. Is provided.

  Flow rate adjusting valves for hot water filling 18A, 18B, 18C, 18D, flow rate adjusting valves for drainage 21A, 21B, 21C, 21D, first mixing flow rate adjusting valves 25A, 25B, 25C, 25D, and second mixing The flow rate adjusting valves 27A, 27B, 27C, and 27D are all electric ball valves, and are controlled by the control unit 22 so that the valve opening degree is a plurality of stages or continuously.

  The hot spring water supply system 1 includes a disinfecting water supply facility 31 for disinfecting the entire system. The disinfecting water supply facility 31 includes a drug tank 31a for storing a bactericidal agent that suppresses the growth of various germs, a drug supply flow rate adjustment valve 31b that is provided on the water pipe and is controlled to be opened and closed by the control unit 22, and a drug tank 31a. And a medicine outlet pipe 31c that guides the antibacterial agent to an ejector (not shown) downstream of the medicine supply flow rate adjustment valve 31b.

  When the flow rate adjusting valve 31b for supplying medicine is controlled to be opened by the control unit 22, the disinfecting water supply facility 31 mixes antibacterial agent stored in the medicine tank 31a through the medicine outlet pipe 31c into tap water from the ejector. The disinfecting water, which is a mixture of tap water and antibacterial agent, is supplied to the source tank 11.

  The control unit 22 is a central unit that operates the entire hot spring water supply system 1 and includes a CPU, a ROM, a RAM, an input unit (input panel), a display unit (display panel), and table data (not shown). . The ROM stores a control program for operating the system.

  The table data is preferably created including the following data obtained by experiments in advance. Table data 1: The ratio of the opened state to the fully opened state of each of the drainage flow regulating valves 21A, 21B, 21C, and 21D is set to, for example, one tenth opened state, and the bathtubs 19A, 19B, 19C, As a condition that each of the 19Ds can be fully filled in 30 minutes, 35 minutes, and 40 minutes, the valve-opening state with respect to the full-open state of each of the water filling flow regulating valves 18A, 18B, 18C, 18D. Percentage. Table data 2: Flow rate of primary temperature hot water and primary side heat exchange when the appropriate temperature hot spring water at the outlet of the secondary side heat exchange element 14b is 42 ° C, 43 ° C, 44 ° C, and 45 ° C, respectively. The correlation value with the flow volume and temperature of the heat transfer fluid which flows through the element 14a. Table data 3: Correlation value between the magnitude of the frequency applied to the inverter motor 15d and the flow rate of the heat transfer fluid flowing through the primary side heat exchange element 14a. In addition, it can also obtain | require with a formula, without being based on table data.

  The CPU reads the control program from the ROM, acquires information from the various sensors, flowmeters, input unit, and table data 1, 2, and 3 according to the control program, and calculates the magnitude of the frequency and loss temperature given to the inverter motor 15d. Thus, the control of the inverter motor 15d and the controlled elements of the flow rate adjustment valve is executed. The control program includes a frequency determination step for determining the magnitude of the frequency applied to the inverter motor 15d.

  The control unit 22 inputs the bathtub target temperature, the loss temperature, and the hot water supply target temperature from the input unit, stores them in another nonvolatile memory, determines the magnitude of the frequency to be given to the inverter motor 15d, and opens the flow rate adjustment valve. It can be used for degree control. The bathtub target temperature is input and set to 42 ° C., for example. The controller 22 determines the loss temperature in the range of, for example, 1 to 4 ° C. in consideration of the season and weather, and is input and set from the input unit. For example, the loss temperature is set to 2 ° C. when the outdoor temperature in summer is high, 4 ° C. when the outdoor temperature is low in winter, and 3 ° C. in spring and autumn.

  Further, the controller 22 automatically sets the loss temperature separately from the input from the input unit. More specifically, the control unit 22 performs heat calculation related to heat dissipation from the heat radiation from the piping system, evaporation as steam in the bathtub, and others, and calculates the loss temperature, and the loss temperature is automatically stored in the storage unit. It is supposed to be set. Therefore, in the present embodiment, as shown in FIG. 1, the information output from the outside air temperature sensor 35, the outside air humidity sensor 36, the black bulb temperature sensor 37, the wind speed sensor 38, and the solar radiation amount sensor 39 that are externally installed is captured. Thermal calculation is performed in a predetermined manner for calculating the loss temperature. Thus, the control unit 22 can switch between the artificial input setting and the automatic setting for the loss temperature.

  During the “inverter control operation”, the control unit 22 opens and closes the filling flow adjustment valve and the drainage flow adjustment valve corresponding to a plurality of bathtubs to be used among the bathtubs 19A, 19B, 19C, and 19D. The opening degree is controlled.

  Moreover, the control part 22 inputs the flow volume supplied to the bathtub 19A, 19B, 19C, 19D measured by the 1st flow meter 13 as information in the case of "inverter control driving". The frequency given to the inverter motor 15d corresponding to the bathtub target temperature is determined according to the flow rate information.

  In the “mixing valve control operation”, the control unit 22 performs the filling flow adjustment valve, the drainage flow adjustment valve, the first one corresponding to one of the bathtubs 19A, 19B, 19C, and 19D to be used. The mixing flow regulating valve and the second mixing flow regulating valve are opened and closed and the valve opening degree is controlled.

  In addition, during the “mixing valve control operation”, the control unit 22 inputs the flow rate of hot water supplied to the bathtubs 19A, 19B, 19C, and 19D measured by the first flow meter 13 as information, and the second The flow rate of hot water supplied to the bathtubs 19A, 19B, 19C, and 19D measured by the flow meter 23 is input as information.

  In addition, the control unit 22 detects the temperature sensor 40 that detects the temperature of the source water in the source tank 11 and the temperature of the appropriate temperature hot spring water that flows through the outlet of the secondary side heat exchange element 14b of the heat exchanger 14. The temperature sensor 41, the temperature sensors 42A, 42B, 42C, 42D for detecting the temperature of the appropriate hot spring water flowing through the hot water supply pipes 17A, 17B, 17C, 17D, and the drain pipes 20A, 20B, 20C, 20D are passed. Temperature information is input from each of the temperature sensors 43A, 43B, 43C, and 43D that detect the drainage temperature of the hot water.

  Next, an example of operation control by the control unit (CPU) 22 will be described with reference to operation flows shown in FIGS.

  First, the operation of the program part for selecting one of “inverter control operation” and “mixing valve control operation” will be described with reference to the operation flow shown in FIG.

  The control unit 22 starts program execution by turning on an operation button (not shown) provided in the control unit, and first waits until information on a bathtub to be used is input from the input unit (step S1). When the information on the bathtub to be used is input, the control unit 22 next determines whether the number of bathtubs to be used is one (step S2). When the number of bathtubs to be used is two or more (determination of NO in step S2), the control unit 22 performs “inverter control operation” (step S3), and when the number of bathtubs to be used is one ("Yes" in step S2), "mixing valve control operation" is performed (step S4). After performing “inverter control operation” or “mixing valve control operation”, “disinfection operation” is performed (step S5).

  Next, the operation of the “inverter control operation” by the control unit 22 will be described with reference to the operation flow shown in FIG.

  First, the control part 22 memorize | stores the bathtub to be used in memory (step S11). Next, the control unit 22 calculates a loss temperature (step S12). Next, the control part 22 calculates the frequency given to the inverter motor 15d for a loss temperature (step S13).

  Next, the control unit 22 includes a filling flow adjustment valve 18A, 18B, 18C, 18D and a filling flow adjustment valve 21A, 21B, 21C, 21D corresponding to a bathtub to be used, The drainage flow regulating valve is opened at each predetermined valve opening (step S14).

  In this case, the control unit 22 sets the opening degree of the drainage flow rate adjustment valve to a state where the opening degree is, for example, one-tenth when fully opened, and drains from the bathtub, and the filling time until the bathtub is full. For example, the hot water filling flow rate adjustment valve is controlled so as to have a valve opening stored in advance so as to be 40 minutes. The first mixing flow rate adjustment valve is fully open, and the second mixing flow rate adjustment valve is fully closed.

  Next, the control part 22 operates the constant pressure feed water pump 12 (step S15). Thereby, the constant pressure feed water pump 12 feeds the source water to the heat exchanger 14.

  Next, the control unit 22 acquires the flow rate flowing through the secondary heat exchange element 14b of the heat exchanger 14 as flow rate information from the first flow meter 13, and based on this flow rate information, the inverter motor 15d. Further, the frequency given to the inverter motor 15d corresponding to the loss temperature is added, the frequency of the added value is given to the inverter motor 15d, and the heat medium liquid generation / circulation equipment 15 is operated (step S16). Here, the control unit 22 calculates the temperature difference between the temperature information of the source water input from the temperature sensor 40 and the hot water supply target temperature (the temperature obtained by adding the bath target temperature (42 ° C.) and the loss temperature). The frequency applied to the inverter motor 15d is controlled according to the temperature difference and the flow rate information from the first flow meter 13. In addition, when there is a difference between the hot water supply target temperature and the actual temperature information input from the temperature sensor 41, the control unit 22 causes the actual temperature information to match the bathtub target temperature (42 ° C.). The frequency applied to the inverter motor 15d is controlled.

  As a result, the flow rate of the heat transfer fluid flowing through the primary side heat exchange element 14a of the heat exchanger 14 is a predetermined ratio to the flow rate of the source water flowing through the secondary side heat exchange element 14b of the heat exchanger 14. As a result, the temperature of the appropriate hot spring water flowing through the outlet of the secondary side heat exchange element 14b is the temperature obtained by adding the bath target temperature (42 ° C) and the loss temperature (1-4 ° C). The hot water supply target temperature is reached. Therefore, hot water filling starts at the hot water supply target temperature in the bathtub. When 40 minutes have elapsed from the start of hot water filling, all the bathtubs are filled almost simultaneously and hot water filling is completed, and the temperature of the hot water becomes the bathtub target temperature (42 ° C.) obtained by subtracting the loss temperature from the hot water supply target temperature. Therefore, bathing is possible at the same time as the hot water filling is completed.

  Next, the control part 22 controls so that it may be in a source flowing state (step S17). Here, the control unit 22 controls the flow rate adjusting valve for hot water filling so as to have a preset valve opening smaller than the valve opening at the time of hot water filling. When there is a difference between the bath target temperature 42 ° C. and the waste water temperature information input from the temperature sensors 43A, 43B, 43C, 43D, the control unit 22 determines that the waste water temperature information is the bath target temperature. The frequency given to the inverter motor 15d is controlled so as to coincide with (42 ° C.). As a result, the temperature of the hot water is not lowered from the bath tub target temperature (42 ° C.), and the valve opening degree is changed so that the hot water flow adjustment valve is in the hot water pouring state. Correspondingly, the flow rate through which the secondary heat exchange element 14b of the heat exchanger 14 flows is smaller than the flow rate during filling.

  Next, the control unit 22 newly acquires the changed flow rate flowing through the secondary side heat exchange element 14b of the heat exchanger 14 as flow rate information from the first flow meter 13, and the flow rate information and the table are obtained. Based on the data, a frequency to be given to the inverter motor 15d is calculated, and this frequency is given to the inverter motor 15d (step S18). Thereby, even if the flow rate flowing through the secondary side heat exchange element 14b of the heat exchanger 14 changes, the primary side heat exchange element 14a flows through the heat exchanger 14 so as to correspond to the changed flow rate. The temperature of the appropriate hot spring water flowing out from the outlet of the secondary side heat exchange element 14b of the heat exchanger 14 after the flow rate change is lower than the hot water supply target temperature and the bath target temperature (42 ° C. ) Is slightly higher than Therefore, the hot water temperature of the bathtub in the state where the hot spring is poured after completion of the hot water filling is kept at the bathtub target temperature (42 ° C.).

  Next, the operation of the “mixing valve control operation” by the control unit 22 will be described with reference to the operation flow shown in FIG.

  First, the control part 22 memorize | stores the bathtub to be used in memory (step S21). Next, the control unit 22 calculates a loss temperature (step S22). Next, the control part 22 calculates the frequency given to the inverter motor 15d for the loss temperature (step S23).

  Next, the control unit 22 includes a filling flow adjustment valve 18A, 18B, 18C, 18D and a filling flow adjustment valve 21A, 21B, 21C, 21D corresponding to a bathtub to be used, The drainage flow rate adjustment valve is opened at each predetermined valve opening set in advance, and the first mixing flow rate adjustment valve is opened, and the valve opening degree and the second mixing flow rate adjustment valve are opened. By opening the valve and setting the valve opening to a predetermined ratio obtained in advance by experiment and stored in the table data, the temperature of the mixed water is controlled to become the hot water supply target temperature (step S24).

  In this case, when there is a difference between the hot water supply target temperature and the temperature information of the mixed water input from the temperature sensors 42A, 42B, 42C, and 42D, the temperature information of the mixed water matches the hot water supply target temperature. In this way, the valve opening degree of the second mixing flow regulating valves 27A, 27B, 27C, 27D is controlled. In addition, the control unit 22 sets the opening degree of the drainage flow rate adjustment valve to a state where the opening degree is, for example, one-tenth when fully opened and drains from the bathtub, and the filling time until the bathtub is full is, for example, The hot water flow adjustment valve is controlled so as to have a valve opening stored in advance so as to be 40 minutes.

  The subsequent operations in steps S25 to S28 shown in FIG. 4 correspond to the same steps S15 to S18 in the operation flow of “inverter control operation”, and thus the description thereof is omitted.

  Next, the operation of the disinfection operation by the control unit 22 will be described with reference to the operation flow shown in FIG.

  The control unit 22 outputs a signal for stopping the pumping pump 30 installed in the source well 29 and a signal for opening the medicine supply flow rate adjusting valve 31b after the last bathing of the day is completed. (Step S31). As a result, disinfecting water is supplied to the source tank 11 instead of the source water.

  Next, the control unit 22 controls the drainage flow rate adjustment valves 21A, 21B, 21C, and 21D to be, for example, 30% open, and controls the other flow rate adjustment valves to be fully open, so that the constant pressure feed water pump 12 is controlled to start driving, and this control state is maintained for a predetermined time (step S32). Thereby, disinfecting water flows through all the piping systems, and the baths 19A, 19B, 19C, and 19D are in a state where the disinfecting water is filled with disinfecting water instead of the source water.

  Next, the control unit 22 controls the medicine supply flow rate adjustment valve 31b and the drainage flow rate adjustment valves 21A, 21B, 21C, and 21D to be closed, and controls the constant pressure feed water pump 12 to stop driving (step). S33). Thereby, supply of the disinfecting water to the source tank 11 is stopped and hot water supply to the bathtub is stopped. By supplying the disinfecting water, the entire piping system and the bathtub are kept in a state of being disinfected with the disinfecting water.

  Next, the control unit 22 controls the drainage flow rate adjustment valves 21A, 21B, 21C, and 21D to be opened in a half-open state as an operation at the time of preparation before bathing. Control is performed so that all other flow rate adjustment valves other than the flow rate adjustment valve 31b are fully opened, and the constant pressure feed water pump 12 is started to be driven (step S34). As a result, the source water flows through the entire piping system in place of the disinfecting water, and the baths 19A, 19B, 19C, and 19D are in a state where the source water is filled with the source water instead of the disinfecting water. Thereby, the smell of disinfection does not remain in the bathtub.

  Next, the controller 22 fills the hot water flow regulating valves 18A, 18B, 18C, 18D, the first mixing flow regulating valves 25A, 25B, 25C, 25D, and the second mixing flow regulating valves 27A, 27B. , 27C and 27D are controlled to be closed, and the constant pressure feed water pump 12 is controlled to stop driving (step S35). As a result, the bath water 19A, 19B, 19C and 19D has no hot spring water from the source water, and preparation is completed so that the hot water can be filled for bathing.

  The hot spring hot water supply system 1 according to the present embodiment has the above-described configuration, and balances the pressure by introducing the hot spring water stored in the hot spring tank 11 through the heat exchanger 14 into the hot spring water at the proper temperature and then into the header 16 for the hot spring water at the proper temperature. In addition, hot spring water of appropriate temperature can be supplied to a plurality of baths 19A, 19B, 19C, and 19D, and bathing can be performed by pouring 100% source water.

  Moreover, the hot spring hot water supply system 1 which concerns on this Embodiment is the number of bathtub 19A, 19B, 19C, 19D to be used input to the control part 22, when filling in bathtub 19A, 19B, 19C, 19D. Even if the flow rate of the source water flowing through the secondary side heat exchange element 14b of the heat exchanger 14 changes due to the change of the control unit 22, the control unit 22 corresponds to the number of bathtubs 19A, 19B, 19C, 19D. Since the motor 15d is variably controlled to a predetermined frequency, the flow rate of the heat transfer fluid flowing through the primary side heat exchange element 14a of the heat exchanger 14 is made to correspond, and the heat exchange amount of the heat exchanger 14 is increased or decreased. The heat exchange of the required hot water supply flow rate and the required heat amount corresponding to the number of bathtubs 19A, 19B, 19C, 19D to be used can be performed.

  Moreover, although the hot spring hot water supply system 1 which concerns on this Embodiment changes the target temperature of the hot water input set to the control part 22, it will increase / decrease the heat exchange amount of the heat exchanger 14, but at this time In addition, the control unit 22 can variably control the inverter motor 15d to a predetermined frequency to perform heat exchange corresponding to the hot water temperature. Therefore, even if the number of bathtubs 19A, 19B, 19C, and 19D to be used changes, hot water can be supplied to the plurality of bathtubs 19A, 19B, 19C, and 19D as appropriate temperature hot spring water suitable for bathing.

  Furthermore, in the hot spring hot water supply system 1 according to the present embodiment, the control unit 22 performs drainage from the start of hot water filling to the bathtubs 19A, 19B, 19C, 19D until the hot water reaches a predetermined liquid level. The flow rate adjusting valve 21 is closed in a fully closed state or close to a fully closed state, and the degree of opening of the hot water flow rate adjusting valve 17 is controlled to be increased, so that hot water can be supplied to a liquid level that allows bathing in a short hot water filling time. can do. Furthermore, in the hot spring hot water supply system 1 according to the present embodiment, when the hot water reaches a predetermined liquid level, the control unit 22 reduces the degree of opening of the hot water flow adjustment valve 17 and drains the water. The flow rate adjustment valve 21 is controlled to increase the degree of opening, so that the hot water flow rate is lowered until the required hot water volume is maintained so that the hot water temperature does not drop, and the drainage flow rate is maintained without being lowered. Therefore, it is possible to bathe at a suitable bathing temperature with 100% source flow.

  In hot spring hot water supply system 1 according to the present embodiment, when the bath target temperature and the loss temperature are set in control unit 22, the outlet temperature of the appropriate hot spring water of heat exchanger 14 is the temperature obtained by adding the bath target temperature and the loss temperature. Since the frequency of the inverter motor 15d is controlled so as to coincide with the hot water supply target temperature, the hot water becomes the bath target temperature at the same time as the hot water filling is completed, so that bathing can be performed under optimum temperature conditions.

  Moreover, the hot spring hot water supply system 1 according to the present embodiment can be bathed at the optimum temperature simultaneously with the completion of the hot water filling throughout the four seasons, eliminates the overshoot of the bathtubs 19A, 19B, 19C, and 19D and the failure of the temperature control, and adjusts the temperature. By eliminating the waiting time and refilling failure of the hot water filling, it is possible to improve the rotation rate of the equipment and realize energy saving control.

  In the hot spring hot water supply system 1 according to the present embodiment, the hot water filling is completed in the same target hot water filling time regardless of the size of the bathtubs 19A, 19B, 19C, 19D. Accordingly, if the target hot water filling time is set to 40 minutes in the control unit 22, for example, one bathtub 19A, 19B, 19C, 19D having a capacity of 1 cubic meter and the other bathtub 19A having a capacity of 2 cubic meters. , 19B, 19C, and 19D, when the filling time of 40 minutes has elapsed, the filling is completed, and all the bathtubs 19A, 19B, 19C, and 19D have the same target bath temperature and can be bathed The time management can be made the same.

  Since the hot spring hot water supply system 1 according to the present embodiment uses only one bathtub 19A, 19B, 19C, 19D and has a small capacity, the minimum frequency that can drive the inverter motor 15d is 10 minutes of the rated frequency. Even if it is driven at 1, the flow rate of the heat transfer fluid is too large in the primary side heat exchange element 14a of the heat exchanger 14, the heat transfer amount of the heat exchanger 14 becomes excessive, and the hot spring water temperature at the outlet changes from the appropriate bathing temperature. In the case of deviation, the control unit 22 causes the first mixing flow rate adjustment valves 25A, 25B, 25C, and 25D and the second mixing flow rate adjustment valves 27A, 27B, 27C, and 27D to have predetermined valve openings, respectively. Control to be. Thereby, the hot spring water transferred by the heat exchanger 14 and the source water passing through the source water header 24 without passing through the heat exchanger 14 are mixed at a predetermined ratio. It can be filled with hot water at a temperature suitable for bathing.

  Moreover, in the hot spring hot water supply system 1 according to the present embodiment, when the amount of hot water supply is large, the inverter works so as to use the heat exchanger 14 at the maximum efficiency point, while the flow rate of hot water supply decreases and the heat exchanger 14 When the load becomes light and the secondary outlet temperature of the heat exchanger 14 reaches a predetermined high temperature, the hot / cold water mixing control system automatically mixes cold water to maintain the hot water supply target temperature. It compensates for the shortcomings of the heat medium liquid circulation inverter control of the heat exchanger 14 that becomes high temperature, and has both energy saving and safety.

  The hot spring hot water supply system 1 according to the present embodiment supplies the disinfecting water to the source tank 11 after the last bathing of the day, thereby supplying the disinfecting water to the heat exchanger 14, the header 16 for the appropriate temperature hot water, and the bathtub 19A. , 19B, 19C, 19D and the piping system that connects them, sterilization of these facilities (suppression of proliferation of various bacteria) can be performed, and preparation for the next day can be prepared. A control part is good also as a structure controlled so that the 1st flow adjustment valve for mixing and the 2nd flow adjustment valve for mixing may be opened after the end of disinfection. As a result, the hot spring hot water supply system according to the present invention can supply disinfecting water supplied from the disinfecting water supply facility to the entire piping system and supply it to the bathtub after the last bathing of the day. Can be controlled (suppressing the growth of various bacteria) and can be prepared for the next day's operation.

  According to the present invention, not only can it be applied to a single bathtub, but it can also be applied to a plurality of bathtubs in which the required hot water supply flow rate and required heat amount are changed, 100% hot spring pouring is performed, and valve opening / closing control is performed with the minimum necessary. Therefore, it is possible to provide a hot spring hot water supply system capable of performing hot water filling at a suitable temperature in a short period of time with less influence of disturbance affecting the temperature of the bathtub.

  In the hot spring hot water supply system 1, when there are two or more bathtubs 19 </ b> A, 19 </ b> B, 19 </ b> C, 19 </ b> D to be used, or when one has a large capacity, the heat exchange amount of the heat exchanger 14 can be changed correspondingly. With these facilities, hot water can be filled in the bathtubs 19A, 19B, 19C, and 19D at a temperature suitable for bathing, and 100% hot spring water can be poured.

  The hot spring hot water supply system of the present invention includes an embodiment in which both a hot water boiler and a cold water generator are installed. In the hot spring hot water supply system 1 according to the above-described embodiment, either the hot water boiler or the cold water generator is employed as the heat medium liquid generation circulation facility 15. However, when the temperature of the source water in the source tank 11 is, for example, 43 to 45 ° C., it is not necessary to heat the source water through the heat exchanger 14 due to the season, weather, or the like. When the source water is passed through the primary side heat exchange element 14a of the heat exchanger 14 and the bathing temperature is 42 ° C, and when the source water is heated through the heat exchanger 14 and the bathing temperature is 42 ° C. When the source water is cooled through the heat exchanger 14, the bathing temperature may be 42 ° C. For this reason, when the temperature of the source water in the source tank 11 is 43-45 degreeC, for example, it is necessary to provide the hot-medium liquid production | generation circulation installation 15 with a small capacity | capacitance hot water boiler and cold water production | generation apparatus.

  The hot spring hot water supply system of the present invention has been described as applying the “mixed valve control operation” when using only one bathtub shown in FIG. 1 in the hot spring hot water supply system 1 according to the present embodiment described above. However, the capacity of one bathtub is large, the flow rate of the heat transfer fluid flowing through the primary side heat exchange element 14a of the heat exchanger 14 is minimized, and the source water flowing through the secondary side heat exchange element 14b If the temperature of the appropriate temperature hot spring water flowing through the outlet of the secondary side heat exchange element 14b becomes the hot water supply target temperature (the temperature obtained by adding the bath target temperature and the loss temperature) , "Mixed valve control operation" equipment is not applied.

  The phrase “based on this flow rate information and table data” in step S14 of FIG. 4 and step S24 of FIG. 5 is replaced with the phrase “based on this flow rate information and a value calculated by numerical analysis”. Another step may be used. Here, the calculated value by numerical analysis is a value obtained by a series of predetermined thermal calculation formulas by a computer.

  In the hot spring hot water supply system 1 according to the present embodiment described above, the water pressure of the water supply facility and the opening / closing of the flow rate adjusting valve 31b for supplying medicine are used as the liquid feeding means of the disinfecting water supply facility. Tap water and antibacterial agent may be supplied at a required ratio to make disinfecting water, and the disinfecting water in the chemical tank 31a may be supplied to the source tank 11 by a pump. Further, the disinfecting water supply facility is configured such that the tap water is filled in the source tank 11 and the constant pressure feed water pump 12 is operated, while the chlorine pump (not shown) is operated in front of the bag filter (not shown), Alternatively, the chlorine concentration may be calculated from the injected amount of the water to produce high-concentration chlorine water, and this high-concentration chlorine water may be filled in all the piping systems and allowed to stand overnight.

  As described above, the hot spring hot water supply system according to the present invention can be applied not only to a single bathtub, but also to a plurality of bathtubs in which the required hot water flow rate and the required heat amount are changed, and is 100% hot spring pouring, The opening and closing control is performed with the minimum necessary, and the influence of disturbance affecting the temperature of the bathtub is less than before, and it has the effect of being able to perform hot water filling at an appropriate temperature in a short time. Useful as a hot spring water supply system.

DESCRIPTION OF SYMBOLS 1 Hot spring hot water supply system 11 Source tank 12 Constant pressure water supply pump 14 Heat exchanger 14a Primary side heat exchange element 14b Secondary side heat exchange element 15 Heat transfer liquid production | generation equipment 15a Heat transfer liquid production | generation means 15c Circulation pump 15d Inverter motor 16 Optimal temperature hot spring Water headers 17A, 17B, 17C, 17D Hot water supply pipes 18A, 18B, 18C, 18D Hot water flow control valves 19A, 19B, 19C, 19D Bathtubs 21A, 21B, 21C, 21D Waste water flow control valves 22 Control unit 24 Source Water header 25A, 25B, 25C, 25D First mixing flow adjustment valve 26A, 26B, 26C, 26D Merge pipe 27A, 27B, 27C, 27D Second mixing flow adjustment valve 31 Disinfection water supply equipment

Claims (6)

A source tank for storing the source water,
A constant pressure feed water pump for pumping the source water stored in the source tank and feeding it at a constant pressure;
The source water supplied by the constant pressure feed water pump is passed through the secondary side heat exchange element, and the heat medium liquid is passed through the primary side heat exchange element, thereby giving the source water hot or cold to an appropriate temperature. A heat exchanger for hot spring water,
A heat pump and a circulation pump driven by an inverter motor. The circulation pump causes the heat medium liquid to flow through and circulate in the primary heat exchange element of the heat exchanger to provide a secondary side. A heat transfer medium generating and circulating facility that gives hot or cold heat to the source water flowing through the heat exchange element;
A header for optimum temperature hot spring water that stabilizes the pressure of the optimum temperature hot spring water by introducing the optimum temperature hot spring water flowing out from the heat exchanger;
Multiple bathtubs,
A flow rate adjustment valve for hot water filling provided in a hot water supply pipe for supplying hot water to each bathtub from the appropriate temperature hot spring water header,
A drainage flow rate adjustment valve for draining hot water from the drain outlet at the bottom of each bathtub, and
Disinfecting water supply equipment for storing a bactericidal agent and supplying disinfecting water containing the bactericidal agent;
A control unit for controlling the inverter motor, the filling flow adjustment valve, and the drain flow adjustment valve;
When the hot water is filled in the bathtub, the control unit variably controls the frequency of the inverter motor at a predetermined frequency corresponding to the required hot water flow rate and required heat amount of the bathtub to be used. The amount of heat exchange is controlled to increase or decrease, and at the start of filling of the hot water to the bathtub, the drainage flow adjustment valve is closed in a fully closed state or nearly fully closed, and the degree of opening of the hot water flow adjustment valve is adjusted. When the hot water reaches a predetermined liquid level, the degree of opening of the hot water flow rate adjustment valve is reduced so that the hot water flow rate is reduced to a required hot water amount that does not lower the hot water temperature. In addition, the degree of opening of the drainage flow rate adjustment valve is increased so that the drainage flow rate is maintained without flowing down and the drainage flow rate is maintained. The liquid supply means of the disinfecting water supply facility is controlled so as to supply disinfecting water to the tank, and after the disinfection, the first mixing flow adjustment valve and the second mixing flow adjustment valve are opened. A hot spring hot water supply system that is controlled by   The control unit sets a bath target temperature as the target temperature of the hot water at the time when the bath is filled with the predetermined liquid level, and the bath target temperature and the bath are set to the predetermined temperature. A loss temperature that is the difference between the temperature of the hot water when the hot water is filled up to the liquid level is set, and the hot water supply target temperature that is the temperature that is the sum of the bath target temperature and the loss temperature 2. The hot spring hot water supply system according to claim 1, wherein the frequency of the inverter motor is controlled so that an outlet temperature of the appropriate temperature hot spring water of the heat exchanger matches the hot water supply target temperature.   The control unit stores in advance in the storage unit the valve opening of the filling flow adjustment valve for each of the bathtubs so that filling of all the bathtubs is completed in the same target filling time. And when there is a request for use of any of the bathtubs and the hot water filling is started, the valve opening degree of the flow adjustment valve for the hot water filling of the bathtub that has been requested to be used is stored in the storage unit. It controls so that it may correspond with a valve opening, The hot spring hot-water supply system of Claim 1 or 2 characterized by the above-mentioned. A source water header that stabilizes the pressure by introducing a part of the source water fed by the constant pressure feed water pump;
A first mixing flow adjustment valve provided in the hot water supply pipe leading the appropriate temperature hot spring water flowing out from the header for the appropriate temperature hot spring water to the flow adjustment valve for hot water filling;
A merging conduit for joining the source water flowing out from the source water header to the hot water pipe guiding the appropriate temperature hot spring water flowing out from the first mixing flow rate adjusting valve to the hot water flow rate adjusting valve;
A second mixing flow control valve provided in the merge pipe, and
The controller has a small amount of heat required for the bathtub to be used, and even if the inverter motor is driven at 1/10 of the rated frequency, the heat exchanger performs heat exchange exceeding the amount of heat required for the bathtub. The valve opening degree of the first mixing flow rate adjustment valve and the valve opening degree of the second mixing flow rate adjustment valve are subjected to correlation control so that the mixed water has an appropriate temperature under such conditions. The hot spring water supply system according to 1 or 2.   The hot-spring hot-water supply system according to any one of claims 1 to 4, wherein the heat medium liquid generating means is a hot water boiler.   The hot-spring hot-water supply system according to any one of claims 1 to 4, wherein the heat medium liquid generating means is a cold water generating device.

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