JP5148640B2 - Water heater - Google Patents

Description

  The present invention relates to a water heater capable of discharging water to a bathtub.

  A water heater is a device that heats water supplied to a water heater using a heating means such as a burner or an electric heater, and supplies hot water at a desired temperature to a bathtub or the like. Some hot water heaters having a reservation automatic hot water supply function are configured to automatically start hot water supply to the bathtub at a certain time calculated backward from the reservation time set by the user (Patent Document 1). Such).

JP 2002-162103 A

By the way, in recent years, from the viewpoint of global warming countermeasures and rising fuel costs, there is a demand for reducing the energy consumption of water heaters having a reservation automatic hot water supply function.
In view of the above points, an object of the present invention is to reduce energy required for hot water supply to a bathtub.

In order to solve the above problems, a first configuration (Claim 1) is a water heater capable of heating supplied water and discharging hot water to a bathtub, and passes the supplied water to a hot water outlet for the bathtub. and water channel, a reservation setting means for setting a reservation time and reservation temperatures in response to the operation of the user, until the reservation time set by the reservation setting means, the water of the preset-recording temperature to the bathtub hot water Reserved operation means for carrying out reserved operation to be stored, and after the reservation time and the reservation temperature are set by the reservation setting means, before the start of hot water by the reserved operation means , to the bathtub through the water passage Water supply control means for supplying water without heating.

  If it is a water heater configured in this way, before the reservation time in the reservation operation arrives, water supply to the bathtub is performed without heating, so if the outside air temperature is higher than the temperature of the water flowing through the water passage, As a result of the water stored in the bathtub absorbing heat from the outside air, the temperature of the stored water can be increased until the start of the hot water supply to the bathtub by the reserved operation. Thereby, the energy required to boil the hot water in the bathtub can be reduced by the amount of heat (energy) absorbed from the outside air.

  The water supply control means in this configuration may supply water by controlling the opening of the water supply valve when, for example, a water supply valve that opens or closes the water passage is provided.

  Further, the water supply control means in this configuration is not limited to other specific conditions as long as the reservation time and the reservation temperature are set. For example, the water supply control means supplies water at a time when the outside air temperature is raised to some extent. It is conceivable that the specific conditions are as follows.

For this purpose, the above-described configuration is preferably made as a second configuration (claim 2) described below.
The second configuration includes outside air temperature specifying means for specifying the outside air temperature. And the said water supply control means supplies water to the said bathtub on the condition that the outside temperature specified by the said outside temperature specification means is more than predetermined | prescribed reference temperature.

  With this configuration, water supply is performed on the condition that the outside air temperature is equal to or higher than the reference temperature, so by setting this reference temperature higher, the water temperature in the bathtub can be further increased when the conditions are met. Can be high.

  The “reference temperature” in this configuration may be a fixed value within a predetermined range that is determined in advance, and is a variable value (eg, peak temperature) determined based on information such as the season and time zone. There may be.

  The outside air temperature specified by the outside air temperature specifying means may be a value obtained by directly detecting the temperature around the bathtub by a sensor, or a value estimated from the temperature detected by the sensor inside or outside the water heater. May be.

  Moreover, it is desirable that the above-described water supply control means set the specific condition of the water supply that the outside air temperature is higher than the incoming water temperature. For this purpose, each of the above-described configurations is a third configuration ( It is good to do as in claim 3).

  In a 3rd structure, the incoming water temperature detection means which detects the incoming water temperature which is the temperature of the water which distribute | circulates the said water flow path is provided. The water supply control means supplies water to the bathtub on the condition that the outside air temperature specified by the outside air temperature specifying means is higher than the incoming water temperature detected by the incoming water temperature detecting means.

  With this configuration, water supply is performed on the condition that the outside air temperature is higher than the incoming water temperature, so that the water supply to the bathtub can be performed only when the temperature of the water thus supplied rises due to heat absorption from the outside air. it can.

  In addition, the water supply control means described above may be a specific condition of water supply that a predetermined time is reached. For this purpose, the above-described respective configurations are described in a fourth configuration (claim). Item 4) should be used.

4th structure WHEREIN: The said water supply control means supplies water to the said bathtub on the condition that it is a predetermined time.
With this configuration, water supply is performed on the condition that it is a predetermined time, so that the condition is satisfied by setting a time zone in which the outside air temperature can be peaked as that time. In this case, the water temperature in the bathtub can be increased efficiently.

  The “predetermined time” in this configuration may be a fixed value within a predetermined range, and may be a variable value (for example, a peak time) determined based on information such as the season. There may be.

Moreover, in each said structure, it is good to make it like the 5th structure (Claim 5) shown below.
5th structure WHEREIN: The said reservation driving | operation means stores the water of the said reserved temperature in the said bathtub by the said reservation time by making the bathtub with hot water whose temperature is higher than the said reserved temperature.

In this configuration, in the reserved operation, water having a temperature higher than the reserved temperature is discharged.
In each of the above configurations, although the temperature of the water stored in the bathtub rises due to endothermic heat from the outside air, it is unlikely that it will normally rise to a temperature that can be set as the reserved temperature. The temperature of the water stored in the bathtub should be low.

In this case, even if the reserved temperature water continues to be discharged in the reserved operation, this water is mixed with water having a temperature lower than the reserved temperature, so that the reserved temperature may not be reached.
However, in this configuration, since water having a temperature higher than the reserved temperature is discharged, it is possible to prevent the temperature of the water stored in the bathtub from reaching the reserved temperature.

Moreover, in each said structure, it is desirable to make it like the 6th structure (Claim 6) shown below.
A sixth configuration is a circulation path that is connected to a bathtub and is capable of circulating water between the bathtub and a circulation that circulates water stored in the bathtub between the bathtub and the circulation path. A circulation control means for circulating the water stored in the bathtub between the bathtub and the circulation path by operating the circulation pump after water supply by the pump and the water supply control means; It has.

If it is this structure, it can stir by circulating the water stored by the bathtub to the circulation path.
Only the layer near the water surface that is in contact with the outside air is likely to receive heat from the outside air, and the water stored below that layer has a low endotherm and tends to remain at a low temperature. There is a high possibility that the temperature rise in the entire water will not be sufficiently realized.

  However, in the above configuration, as the stored water is agitated, the replacement of the layer near the water surface is promoted, so the water stored below from the layer near the water surface is shifted to the vicinity of the water surface. It is possible to prevent the temperature from being kept low, and as a result, it is possible to realize a sufficient temperature rise for the entire stored water.

Further, in this configuration, the seventh configuration (Claim 7) described below is preferably used.
The seventh configuration includes a heat exchanger that performs heat exchange between outside air and water flowing through the circulation path, and a blowing unit that blows air toward the heat exchanger.

If it is this structure, the heat absorption from the external air with respect to the water in this circulation path can be accelerated | stimulated by ventilating to the heat exchanger provided in the circulation path.
Moreover, in each said structure, it is good to make it like the 8th structure (Claim 8) shown below.

The eighth configuration includes a heat path that allows hot water heated by the solar light heater to flow through the water flow path.
If it is this structure, since this water temperature can be raised more by storing the water heated with the solar water heater in the bathtub, further energy reduction is realizable.

The figure which shows the whole structure of a water heater Flow chart showing manual hot water supply operation Flow chart showing bath hot water operation Flow chart showing reserved operation

Embodiments of the present invention will be described below with reference to the drawings.
(1) Overall configuration As shown in FIG. 1, the hot water heater has a hot water supply unit 1 that heats and supplies hot water, a heat retaining unit 3 that retains water stored in the bathtub 100, and the operation of each unit. And a control unit 5 for controlling.

  The hot water supply unit 1 includes a water passage 11 through which water supplied from the outside to the hot water outlet, a hot water supply side heat exchanger 13 inserted in the middle of the water passage 11, and a hot water supply side heat exchanger 13 in the water passage 11. The gas burner 15 etc. which heat the provided path | route is comprised. In addition, in this embodiment, the bathtub 100 and the hot water tap 200 just below are hot water outlet locations.

  Among these, the water passage 11 is provided with an incoming water temperature detection sensor 17 for detecting the temperature of water supplied from the outside (incoming water temperature) upstream of the hot water supply side heat exchanger 13, and downstream of the same path. Heating temperature detection sensors 19 for detecting the temperature of the water heated through this path are provided at two locations.

  Further, in the water passage 11, in order from the upstream side (water supply side), a strainer 21 that filters the supplied water, a water amount sensor 23 that detects the amount of water supplied, and a water amount control that controls the amount of water in the water passage 11. A valve 25 is provided.

  In addition, on the downstream side of the water passage 11 (on the side of the hot water location), a bath passage 27 leading to the bathtub 100 is branched, and the bath passage 27 is opened and closed. A dropped water amount sensor 29 is provided for detecting the amount of water (total amount) supplied to the bathtub 100 through the water passage valve 28 for controlling water flow and the passage 27 for the bath.

  In addition, not only a normal water supply source (water pipe) but also a heat path 310 for receiving water supplied from the solar heater 300 can be connected to the water passage 11. You may comprise so that water supply can be received.

  The heat retaining unit 3 is a circulation path 31 connected to the bathtub 100 as a path capable of circulating water between the bathtub 100 and a circulation pump that circulates the water stored in the bathtub 100 between the bathtub 100 and the circulation path 31. 33, a heat retaining side heat exchanger 35 provided on the outer periphery of a partial path in the circulation path 31, a gas burner 37 for heating the path in which the heat retaining side heat exchanger 35 is provided in the circulation path 31, and a partial path in the circulation path 31 The blower-side heat exchanger 41 provided on the outer periphery of the fan, the blower 43 that blows air toward the path where the blower-side heat exchanger 41 is provided in the circulation path 31, and the like.

Among these, the circulation pump 33 is provided on the upstream side of the path through which water circulates in the circulation path 31, specifically, between the heat retaining side heat exchanger 35 and the bathtub 100.
The circulation path 31 is provided with a bathtub temperature detection sensor 45 for detecting the temperature of the water stored in the bathtub 100 on the upstream side of the path through which water circulates. A heating temperature detection sensor 47 that detects the temperature of the water heated through the path provided with the exchanger 35 is provided.

  The circulation path 31 is connected to the upstream side of the path through which water circulates, specifically, between the bathtub 100 and the circulation pump 33, and is supplied from the bath-bound path 27. The water to be discharged is dropped into the bathtub 100 through the circulation path 31 from this connection portion.

Further, the blower side heat exchanger 41 is provided on the upstream side of the path through which water circulates in the circulation path 31, specifically, on the upstream side of the path on which the heat retaining side heat exchanger 35 is provided.
The control unit 5 includes a controller 51 that controls the operation of each unit using a built-in microcomputer, a main remote controller 53 that receives user operations outside the bathroom, a sub-remote controller 55 that receives user operations inside the bathroom, and the like. Among these, the sub remote controller 55 is provided with an outside air temperature detection sensor 57 that detects the outside air temperature around the bathtub 100.
(2) Operation of Water Heater The above-described water heater performs various operations described below by the controller 51 controlling the operation of each unit when receiving a user operation. The following operation is performed under the condition that the standby state (power on) is set.
(2-1) Manual Hot Water Supply Operation First, the procedure of the manual hot water supply operation started when the hot water tap 200 is opened will be described with reference to FIG.

First, the controller 51 monitors the amount of water in the water passage 11 detected by the water amount sensor 23 and enters a standby state until the amount of water reaches a certain level (s130: NO).
When the amount of water detected by the water amount sensor 23 becomes equal to or greater than a certain level (s130: YES), the controller 51 starts heating the water passage 11 by the gas burner 15 (s140). The heating at this time is controlled so that the temperature detected by the heating temperature detection sensor 19 is maintained near a preset temperature.

  Thereafter, the controller 51 continues heating the water passage 11 by the gas burner 15 while the amount of water detected by the water amount sensor 23 is not less than a certain amount (s150: NO), and when the amount of water becomes less than a certain amount (s150: YES), the heating is stopped (s160).

The operation so far is repeated while the water heater is in the standby state.
When the standby state of the water heater is canceled (power off), the heating of the water passage 11 by the gas burner 15 is stopped and the manual hot water supply operation is immediately terminated.
(2-2) Bath Hot Water Supply Operation Subsequently, the user starts the hot water supply to the main remote controller 53 or the sub-remote controller 55 by performing an operation (for example, a specific switch operation) for supplying hot water to the bathtub 100. The operation procedure will be described with reference to FIG.

First, the controller 51 forms a path from the water flow path 11 to the bathtub 100 by opening the flow path 27 for the bath to the water flow valve 28 (s210).
Next, the controller 51 operates the water amount control valve 25 to start entering water with a constant amount of water into the water passage 11 (s220).

  Thus, when the water flow into the water passage 11 is started, the controller 51 is in a standby state until the water amount detected by the water amount sensor 23 becomes equal to or higher than a certain level (s230: NO). YES), the controller 51 starts heating the water passage 11 by the gas burner 15 (s240). The heating at this time is controlled so as to be maintained near the set temperature as described above.

As a result, the hot water is discharged from the water passage 11 to the bathtub 100 via the bath-bound flow passage 27 and a part of the circulation passage 31.
Thereafter, the controller 51 continues heating the water passage 11 by the gas burner 15 until the total amount of water detected by the dropped water amount sensor 29 reaches a preset water amount (s250: NO). When the total amount of water reaches the set water amount (s250: YES), the heating is stopped (s260).

Next, the controller 51 stops the water entry into the water passage 11 by operating the water amount control valve 25 (s270).
Next, the controller 51 closes the route from the water passage 11 to the bathtub 100 by causing the water passage valve 28 to close the passage 27 for the bath (s280).
As described above, after the water entering the water passage 11 is stopped (s270), the route from the water passage 11 to the bathtub 100 is closed (s280), and the heating of the water passage 11 by the gas burner 15 is stopped, The bath water supply operation ends.

  Next, the controller 51 checks whether or not it is set to a “heat keeping mode” for keeping the water stored in the bathtub 100 (s310). This heat retention mode is an operation mode in which the water stored in the bathtub 100 is kept warm, and is set or canceled by a specific operation on the main remote controller 53 or the sub remote controller 55.

If the “heat retention mode” is not set (s310: NO), the bath hot water supply operation is terminated.
On the other hand, when the “heat retention mode” is set (s310: YES), the controller 51 starts the circulation of the water stored in the bathtub 100 by operating the circulation pump 33 (s320).

  Thus, after the circulation of the water stored in the bathtub 100 is started, the controller 51 monitors the temperature detected by the bathtub temperature detection sensor 45, and the standby state is maintained while the temperature is equal to or higher than the set temperature. (S330: YES, s340: NO). If the “warming mode” is canceled in this standby state (s340: YES), the circulation of water is stopped by stopping the circulation pump 33 (s390), and then the bath hot water supply operation ends.

  On the other hand, when the temperature detected by the bathtub temperature detection sensor 45 becomes lower than the set temperature (s330: NO), the controller 51 starts heating the circulation path 31 by the gas burner 37 (s350). The heating at this time is controlled so that the temperature detected by the heating temperature detection sensor 47 is maintained near the set temperature.

  Thus, while the temperature detected by the heating temperature detection sensor 47 is lower than the set temperature (s360: YES, s370: NO), the controller 51 continues heating the circulation path 31 by the gas burner 37. If the “warming mode” is canceled while the heating is continued (s370: YES), the circulation of water is stopped by stopping the circulation pump 33 (s390), and then the bath hot water supply operation ends.

  If the temperature detected by the heating temperature detection sensor 47 becomes equal to or higher than the set temperature during the heating of the circulation path 31 by the gas burner 37 (s360: NO), the heating of the circulation path 31 by the gas burner 37 is stopped (s380). ).

The heating start and stop of the circulation path 31 performed so far are repeated until the “warming mode” is canceled (s330 to s380).
In addition, when the standby state of the water heater is canceled during the circulation of water and the heating of the circulation path 31, the circulation of water by the circulation pump 33 and the heating of the circulation path 31 by the gas burner 37 are stopped. Immediately, the bath water supply operation ends.
(2-3) Reserved Driving Operation Next, a procedure of a reserved driving operation that is started when an operation for instructing a reserved driving is performed on the main remote controller 53 or the sub-remote controller 55 will be described with reference to FIG. This “operation for instructing a reservation operation” is an operation for arbitrarily designating a reservation time and a reservation temperature and instructing that the reserved temperature water should be stored in the bathtub 100 at the reservation time.

  First, the controller 51 sets (stores in the built-in memory) the designated reservation time and reserved temperature as parameters (set time and set temperature) for reserved operation (s400). Hereinafter, the reservation time and the reservation temperature set in this way are referred to as “set time” and “set temperature”.

  Next, the controller 51 checks the remaining time until the set time (s410), and if the remaining time is not equal to or greater than the predetermined threshold value (s410: NO), the same hot water supply operation as described above is performed. After performing (s500), a reservation driving | operation operation | movement is complete | finished.

  This “threshold value” is a value determined as the time required to store the set amount of water in the bathtub 100. Specifically, the water at the set temperature is stored by the set time in the bath hot water operation. It is the time required to do.

  On the other hand, if the remaining time until the set time is equal to or greater than the threshold value (s410: YES), the controller 51 checks whether or not a predetermined water supply condition is satisfied (s420), and the water supply condition is satisfied. If not (s420: NO), the process returns to the remaining time check described above (s420 → s410).

  Here, as the water supply condition, for example, it is conceivable that the outside air temperature around the bathtub 100 is equal to or higher than a predetermined reference temperature. In this case, is the outside air temperature detected by the outside air temperature detection sensor 57 equal to or higher than the reference temperature? It may be checked whether or not (s420). This “reference temperature” is a peak temperature that can be reached according to the season and time at that time, and may be a fixed value within a certain range determined in advance, or based on information on the season and time It may be a variable value that changes.

  In addition, as a water supply condition, it may be possible to adopt that the current time is a predetermined reference time which is a time zone in which the outside air temperature can reach a peak. In this case, the current time becomes the reference time. It may be checked whether or not there is (s420). The “reference time” is a time zone in which a peak temperature according to the season or the like can be reached, and is a variable value that changes based on information such as the season.

  In addition, it may be considered that the outside water temperature is higher than the incoming water temperature as the water supply condition. In this case, the outside air temperature detected by the outside air temperature detection sensor 57 is the incoming water temperature detected by the incoming water temperature detection sensor 17. It may be checked whether or not it is higher (s420).

  On the other hand, after the water supply conditions are satisfied (s420: YES), the controller 51 opens the flow path 27 for the bath to the water flow valve 28, thereby forming the path from the water flow path 11 to the bathtub 100. (S430) By operating the water amount control valve 25, the water flow into the water passage 11 is executed for a predetermined time (s440).

  Here, the operation amount of the water amount control valve 25 is adjusted so that the water entering the water passage 11 does not exceed the water amount at which the heating of the water passage 11 by the gas burner 15 is started. In this way, a certain amount of non-heated water is supplied from the water passage 11 to the bath 100 through a part of the bath passage 27 and the circulation passage 31.

  Here, non-heating water supply is realized by suppressing the control amount of the water amount control valve 25. However, non-heating water supply may be realized with another configuration. For example, it is conceivable that the threshold of the amount of water at which heating of the water passage 11 is started is made larger than usual only during a period in which water supply is performed without heating.

  Next, the controller 51 starts the circulation of the water stored in the bathtub 100 by operating the circulation pump 33 (s450), and also starts the blowing by the blower 39 (s460). In this way, the heat absorption from the outside air of the water flowing through the circulation path 31 is promoted by the blower 39.

  Next, the controller 51 enters a standby state while the remaining time is equal to or greater than the threshold value (s470: YES). After that, when the remaining time is less than the threshold value (s470: NO), the circulation pump 33. Is stopped, the circulation of the water stored in the bathtub 100 is stopped (s480), and the air blowing by the blower 39 is stopped (s490).

  And after performing the hot-water supply operation similar to what was mentioned above (s500), a reservation driving | operation operation | movement is complete | finished. In the bath water supply operation performed in this case, when the water passage 11 is heated by the gas burner 15 (s240), control is performed so as to be maintained near a temperature (set temperature + α) higher than the set temperature.

  This is because the temperature of the water supplied to the bathtub 100 in advance is usually lower than the set temperature. In this case, the temperature of the water finally stored in the bathtub 100 may be lower than the set temperature. For this reason, heating is performed so as to be maintained near a temperature higher than the set temperature.

In addition, about "+ (alpha)" in this case, the big value according to the total amount of the water supplied to the bathtub 100 in advance is set.
(3) Action and Effect With the water heater configured as described above, in the reserved operation, water is supplied to the bathtub 100 without heating before the reserved time (set time) arrives (s410 in FIG. 4). ~ S440), if the outside air temperature is higher than the temperature of the water flowing through the water passage 11, as a result of the water stored in the bathtub 100 absorbing heat from the outside air, the temperature of the stored water is reduced to the start of the hot water supply to the bathtub 100 by the reserved operation. It can be raised by a certain temperature. Thereby, the energy required to boil the hot water in the bathtub 100 can be reduced by the amount of heat (energy) absorbed from the outside air. That is, the energy required for hot water supply to the bathtub 100 is reduced by the amount of heat that warms the hot water with air.

  In the above embodiment, when the water supply condition is “the outside air temperature is equal to or higher than the reference temperature”, water supply is performed on the condition that the outside air temperature is equal to or higher than the reference temperature (see FIG. 4 s420 “YES”), by setting the threshold value high, the water temperature in the bathtub 100 can be efficiently increased when the condition is satisfied.

  In the above embodiment, when the water supply condition is “the current time is the reference time”, the water supply is performed on the condition that the predetermined reference time is set. By setting a time zone during which the outside air temperature can reach a peak, the water temperature in the bathtub can be efficiently increased when the conditions are satisfied.

  In the above embodiment, when the water supply condition is “the outside air temperature is higher than the incoming water temperature”, the water supply is performed on the condition that the outside air temperature is higher than the incoming water temperature. Water can be supplied to the bathtub 100 only when the temperature rises due to heat absorption from the outside air.

In the above embodiment, in the reserved operation, water having a temperature higher than the reserved temperature (set temperature) is discharged.
In the above embodiment, although the temperature of the water stored in the bathtub 100 rises due to heat absorption from the outside air, it is unlikely that the temperature normally rises to a temperature that can be set as the reserved temperature. The temperature of the water stored in the bathtub 100 should be lower.

In this case, even if the reserved temperature water continues to be discharged in the reserved operation, this water is mixed with water having a temperature lower than the reserved temperature, so that the reserved temperature may not be reached.
However, in this configuration, since water having a temperature higher than the reserved temperature is discharged, it is possible to prevent the temperature of the water stored in the bathtub 100 from reaching the reserved temperature.

  Moreover, in the said embodiment, since this water temperature can be raised more by making the bathtub 100 store the water heated with the solar water heater 300, further energy reduction is realizable.

Moreover, in the said embodiment, it can stir by circulating the water stored by the bathtub 100 to the circulation path 31 (s320-s380 of FIG. 3).
The water stored in the bathtub 100 is susceptible to heat absorption from the outside air only in the vicinity of the water surface that is in contact with the outside air, and the water stored below that layer tends to have a low endotherm and remain at a low temperature. There is a high possibility that the temperature rise in the entire stored water is not sufficiently realized.

  However, in the above embodiment, as the stored water is agitated, the replacement of the layer near the water surface is promoted, so that the water stored below from the layer near the water surface is shifted to the vicinity of the water surface. Therefore, it is possible to prevent the temperature from being kept low, and as a result, it is possible to realize a sufficient temperature rise for the entire stored water.

Moreover, in the said embodiment, the heat absorption from the external air in the water in this circulation path 31 can be accelerated | stimulated by ventilating to the heat retention side heat exchanger 35 provided in the circulation path 31. FIG.
(4) Modifications The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and can take various forms as long as they belong to the technical scope of the present invention. Needless to say.

  For example, in the embodiment described above, the outside air temperature around the bathtub 100 is directly detected by the outside air temperature detection sensor 57. However, the outside air temperature around the bathtub 100 may be estimated based on detection values of the bathtub temperature detection sensor 45, the heating temperature detection sensor 19, and the like, that is, may be detected indirectly.

  In the embodiment described above, the outside air temperature detection sensor 57 is provided in the sub-remote controller 55. However, the outside air temperature detection sensor 57 may be provided in components other than the sub-remote controller 55 or in the bathroom.

  Moreover, in the said embodiment, after performing water supply to the bathtub 100 in advance (s440 of FIG. 4), while circulating the water stored in this way between the circulation paths 31, and to a part of the circulation path 31 After performing ventilation, it is comprised so that it may transfer to bath hot-water supply operation | movement. However, you may comprise so that it may transfer to bath hot water supply operation | movement immediately after water supply, without performing such water circulation and ventilation.

Further, in the above-described embodiment, in the reserved operation, the remaining time is equal to or greater than the threshold value, and only when the water supply condition is satisfied (s410 and s420 in FIG. 4), the preliminary water supply is performed (s440 in the figure). ) Is configured as follows. However, when the remaining time is equal to or greater than the threshold value, the water supply may be performed in advance without confirming whether the water supply condition is satisfactory.
(5) Correspondence with the present invention In the embodiment described above, FIG. 4 s110 is the reservation setting means in the present invention, s410 to s500 in FIG. 4 are the reserved operation means in the present invention, and s430 and s440 in FIG. It is the water supply control means in the invention, the outside air temperature detection sensor 57 is the outside air temperature specifying means in the invention, the incoming water temperature detection sensor 17 is the incoming water temperature detection means in the invention, and the blower 43 is the air blowing means in the invention. .

  DESCRIPTION OF SYMBOLS 1 ... Hot water supply part, 3 ... Thermal insulation part, 5 ... Control part, 11 ... Water flow path, 13 ... Hot water supply side heat exchanger, 15 ... Gas burner, 17 ... Incoming water temperature detection sensor, 19 ... Heating temperature detection sensor, 21 ... Strainer, DESCRIPTION OF SYMBOLS 23 ... Water quantity sensor, 25 ... Water quantity control valve, 27 ... Flow path to bath, 28 ... Water flow valve, 29 ... Inflow water quantity sensor, 31 ... Circulation path, 33 ... Circulation pump, 35 ... Thermal insulation side heat exchanger, 37 ... Gas burner, 39 ... Blower, 41 ... Blower side heat exchanger, 43 ... Blower, 45 ... Bath temperature detection sensor, 47 ... Heating temperature detection sensor, 51 ... Controller, 53 ... Main remote control, 55 ... Sub remote control, 57 ... Outside temperature Detection sensor, 100 ... tub, 200 ... hot water tap, 300 ... solar heater, 310 ... heat path.

Claims (8)

A water heater capable of heating the supplied water and discharging it to the bathtub,
A water passage for passing the supplied water to the hot water outlet for the bathtub;
Reservation setting means for setting a reservation time and a reservation temperature in response to a user operation,
Reservation operation means for carrying out a reservation operation in which the water at the set reservation temperature is discharged into the bathtub and stored by the reservation time set by the reservation setting means;
After the reservation time and the reservation temperature are set by the reservation setting means, before the start of the hot water by the reservation operation means, water supply control means for supplying water without heating to the bathtub through the water passage, A water heater characterized by having.
An outside air temperature specifying means for specifying the outside air temperature,
The said water supply control means performs water supply to the said bathtub on the condition that the outside temperature specified by the said outside temperature specification means is more than predetermined | prescribed reference temperature. Water heater. An incoming water temperature detecting means for detecting an incoming water temperature that is a temperature of water flowing through the water passage,
The water supply control means performs water supply to the bathtub on the condition that an outside air temperature specified by the outside air temperature specifying means is higher than an incoming water temperature detected by the incoming water temperature detecting means. Item 3. A water heater according to item 2. The hot water heater according to any one of claims 1 to 3, wherein the water supply control means supplies water to the bathtub on the condition that a predetermined time is reached. The reserved operation means stores water at the reserved temperature in the bathtub by the reserved time by letting the bathtub with hot water having a temperature higher than the reserved temperature. The water heater as described in any one of. A circulation path that is connected to the bathtub and is capable of circulating water between the bathtub and
A circulation pump for circulating water stored in the bathtub between the bathtub and the circulation path;
A circulation control means for circulating the water stored in the bathtub between the bathtub and the circulation path by operating the circulation pump after the water supply by the water supply control means is performed. The water heater according to any one of claims 1 to 5, wherein: A heat exchanger for exchanging heat between outside air and water flowing through the circulation path;
The water heater according to claim 6, further comprising a blowing unit that blows air toward the heat exchanger. The hot water heater according to any one of claims 1 to 7, further comprising: a heat path that allows hot water heated by the solar water heater to flow through the water path.

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