JP5818585B2 - Memorial device - Google Patents

Description

  The present invention relates to a chasing device provided with a chasing circulation path for circulating hot water in a bathtub and a chasing heating section for heating the hot water at an intermediate position of the chasing circulation path.

  For example, when a user has a request for memorialization by turning on a memorial switch or the like, the operation control unit activates the memorial circulation pump and the memorial circuit for memorialization is performed. The hot water in the bathtub is circulated, and the hot water circulated is heated by a burner combustion-type reheating heater, and the reheating operation for supplying the heated hot water to the bathtub is performed ( For example, see Patent Document 1.)

JP 2008-8588 A

  Recently, highly insulated bathtubs (“Highly insulated bathtubs” as defined in JIS A5532) have been certified as the target of residential eco-points, and it is expected that the spread of highly insulated bathtubs will be promoted in the future. Is done. In this highly heat-insulated tub, heat dissipation from the tub is suppressed, so the amount of heat released from the remedy circulation path connecting the tub and the heating unit for remedy may be larger than that from the tub. In particular, when a device equipped with a heating unit for remembrance is installed outdoors, a circulatory circuit for remembrance is installed outdoors to connect the device installed outdoors and a bathtub installed in the bathroom. Therefore, the heat radiation amount in the memorial circuit is significantly larger than that of the bathtub. Therefore, the hot water remaining in the memorial circuit may be cooler than the hot water in the bathtub. In such a case, as in the device described in Patent Document 1, when the operation control unit performs a memorial operation for operating the memorial circulation pump and circulating hot water in the bathtub in the memorial circulation path, Low-temperature hot water remaining in the memorial circuit at the beginning of the memorial operation is supplied to the bathtub, which gives the user bathing in the bathtub an unpleasant feeling of cold water.

  Further, as a memorial device, for example, when it is detected that the temperature detected by a temperature sensor disposed in the middle part of the memorial circuit has risen to a temperature higher than the set temperature from the start of memorial operation. There is a device that terminates the memorial operation. However, as described above, when the hot water remaining in the memorial circuit is lower in temperature than the hot water in the bathtub, the hot water that is detected by the temperature sensor is added during the memorial operation. It changes from the low temperature hot water remaining in the hot water of the bathtub. Therefore, there is a case in which the temperature detected by the temperature sensor rises to a temperature higher than the set temperature from the start of the memorial operation by changing the hot water to be detected by the temperature sensor. In such a case, the memorial operation is erroneously ended despite the midway of the memorial operation. As a result, only the memorial circuit is kept warm, which adversely affects the energy saving performance of the device.

  The present invention has been made paying attention to such a point, and its purpose is to appropriately perform hot water replenishment in a bathtub without causing discomfort to the user when using a highly insulated bathtub. It is in providing a memorial device that can perform the above.

In order to achieve this object, the characteristic configuration of the remedy device according to the present invention includes a remedy circulation path for circulating hot water in a bathtub and a remedy for heating the hot water at an intermediate portion of the circulation circuit for the remedy. In the chasing device provided with the heating section for heating, the chasing circulation path includes a bathtub return path to which hot water of the bathtub is supplied, and a bathtub outgoing path for supplying hot water to the bathtub, As a memorial operation for memorializing the hot water of the bathtub, a drainage part for draining the hot water of the memorial circuit to the outside of the bathtub at the front of the bathtub in front of the bathtub of the bathtub outward path , First, hot water in the bathtub is supplied to the recirculation circuit, and the drainage unit performs drainage treatment to drain hot water remaining in the recirculation circuit, and then the hot water in the bathtub is added to the retreat circuit. A circulating heating process in which the hot water is circulated in the recirculation circuit and heated in the reheating heating section. Includes a driving control unit that performs, the comprises a temperature sensor for detecting the hot water temperature in the middle part of the add焚用circulation path, the operation control unit may detect the temperature rise at the temperature sensor from the start of the waste water treatment The duration for wastewater treatment is set on the basis of the elapsed time until the wastewater treatment is completed, and when the duration of the wastewater treatment reaches the duration for wastewater treatment, the wastewater treatment is terminated and the circulation heating treatment is started. in that it is configured to.

According to this characteristic configuration, the operation control unit first performs drainage processing for draining hot water remaining in the circulation circuit in the drainage unit as a memorial operation, so a highly insulated bathtub is used as the bathtub. Thus, even when the hot water remaining in the memorial circuit is cooler than the hot water in the bathtub, the low-temperature hot water can be drained outside the bathtub without being supplied to the bathtub. . Since the operation control unit performs the circulation heating process after the drainage treatment, the hot water in the bathtub is circulated in the memorial circuit while the hot water remaining in the memorial circuit is drained. The hot water heated in the heating part for firewood can be supplied to the bathtub, and the hot water in the bathtub can be retraced. Therefore, when using a highly insulated bathtub as a bathtub, it is possible to appropriately perform hot water replenishment in the bathtub without supplying the user with the unpleasant feeling of cold water without supplying low-temperature hot water to the bathtub. it can.
Then, when the operation control unit performs the wastewater treatment, the hot water in the bathtub is supplied to the memorial circuit, the hot water remaining in the memorial circuit is drained, and the low-temperature hot water remaining in the memorial circuit is discharged. The hot water in the bathtub is replaced with hot water. Then, when it is detected that the temperature detected by the temperature sensor provided in the midway part of the memorial circuit has risen, the part from the bathtub to the place where the temperature sensor is installed in the memorial circuit is the remaining low-temperature hot water. It can be determined that the hot water has been replaced with hot water. Therefore, according to this characteristic configuration, the operation control unit sets the location of the temperature sensor from the bathtub in the circulation circuit based on the elapsed time from the start of the wastewater treatment until the temperature sensor detects the temperature rise. The drainage treatment duration required to drain the entire amount of hot water remaining in the memorial circuit at the beginning of the wastewater treatment can be set using a pipe length other than the above-described parts. Then, when the duration of the wastewater treatment reaches the set wastewater treatment duration, the operation control unit terminates the wastewater treatment and starts the circulation heating treatment, so that the total amount of hot water remaining in the memory circulation path In a state where the water is appropriately drained, the transition from the waste water treatment to the circulating heat treatment can be performed accurately. Moreover, since a temperature sensor is usually provided in the middle of the circulation circuit for determining the end of the circulation heating process, this temperature sensor can be used for waste water treatment, and a new temperature sensor is provided. In addition, the entire amount of hot water remaining in the memorial circuit can be appropriately drained while simplifying the configuration.

According to a further characteristic configuration of the tracking device according to the present invention, the operation control unit is configured such that a low-temperature condition in which the hot water remaining in the tracking circuit is lower than the hot water in the bathtub is satisfied. Is configured such that when the chasing operation is performed and the low temperature condition is not satisfied, only the circulation heating process is performed without performing the drainage process.

When the hot water remaining in the bathtub is remedied, the hot water remaining in the remedy circuit is supplied to the tub when the temperature of the hot water remaining in the circulator circuit is lower than that of the bathtub. there is a possibility. Therefore, according to this feature configuration, the operation control unit performs the memorial operation only when the low temperature condition is satisfied, and when the low temperature condition is not satisfied, only the circulation heating process is performed without performing the drainage process. Like to do. Thereby, it is possible to appropriately prevent the low-temperature hot water from being supplied to the bathtub without wastefully draining the hot water remaining in the memorial circuit.

Another characteristic configuration of the chasing device according to the present invention includes a chasing circulation path for circulating hot water in the bathtub and a chasing heating section for heating the hot water at a midpoint of the chasing circulation path. In the remedy apparatus, the remedy circulation path includes a bathtub return path to which hot water of the bathtub is supplied, and a bathtub return path for supplying hot water to the bathtub. As a memorial operation for memorializing the hot water in the bathtub, a drainage part for draining hot water of the memorial circuit to the outside of the bathtub is provided in a front part of the bathtub in front of the bathtub. Is supplied to the memorial circuit, and the drainage unit drains hot water remaining in the memorial circuit, and then the hot water in the bathtub is treated in the memorial circuit. An operation control unit is provided that performs a circulating heating process in which the hot water is circulated and heated in the heating unit for remedy. The operation control unit performs the chasing operation when the low temperature condition in which the hot water remaining in the chasing circulation path is lower than the hot water of the bathtub is satisfied, and the low temperature When the condition is not satisfied, only the circulating heat treatment is performed without performing the waste water treatment .

According to this characteristic configuration, the operation control unit first performs drainage processing for draining hot water remaining in the circulation circuit in the drainage unit as a memorial operation, so a highly insulated bathtub is used as the bathtub. Thus, even when the hot water remaining in the memorial circuit is cooler than the hot water in the bathtub, the low-temperature hot water can be drained outside the bathtub without being supplied to the bathtub. . Since the operation control unit performs the circulation heating process after the drainage treatment, the hot water in the bathtub is circulated in the memorial circuit while the hot water remaining in the memorial circuit is drained. The hot water heated in the heating part for firewood can be supplied to the bathtub, and the hot water in the bathtub can be retraced. Therefore, when using a highly insulated bathtub as a bathtub, it is possible to appropriately perform hot water replenishment in the bathtub without supplying the user with the unpleasant feeling of cold water without supplying low-temperature hot water to the bathtub. it can.
In addition, when the hot water remaining in the bathtub is refrigerated, the low-temperature hot water remaining in the hot water circulation path is supplied to the bathtub when the hot water remaining in the hot water circulation circuit is cooler than the hot water in the bathtub. There is a possibility that. Therefore, according to this feature configuration, the operation control unit performs the memorial operation only when the low temperature condition is satisfied, and when the low temperature condition is not satisfied, only the circulation heating process is performed without performing the drainage process. Like to do. Thereby, it is possible to appropriately prevent the low-temperature hot water from being supplied to the bathtub without wastefully draining the hot water remaining in the memorial circuit.

A further characteristic configuration of the memory device according to the present invention includes a hot water supply unit that supplies hot water heated by the heating unit for hot water supply to the bathtub, and the operation control unit performs the circulation heating process, There exists in the point comprised so that the pouring process which supplies the hot water heated in the said hot-water supply heating part in the said hot-water supply part to the said bathtub may be performed.

As described above, since the hot water remaining in the circulation circuit is drained by performing the drainage treatment, the amount of hot water in the bathtub is reduced by the amount of drainage. Therefore, according to the present feature configuration, the operation control unit performs the hot water treatment by supplying the hot water or the hot water heated by the heating unit for hot water supply to the bathtub after performing the circulating heat treatment, thereby performing the waste water treatment. The amount of water corresponding to the amount of drained water can be supplemented with water or hot water heated by the hot water supply heating section. Therefore, the amount of hot water at the start of the memorial operation can be maintained as the amount of hot water in the bathtub, and the amount of hot water in the bathtub can be prevented from decreasing.

  According to a further characteristic configuration of the tracking device according to the present invention, the heating unit for tracking is configured to include a latent heat recovery type heat exchanger, and the drain generated by the latent heat recovery type heat exchanger is stored. A drain tank that drains the drain stored in the drain tank to an intermediate portion of the recirculation circuit, and the operation control unit includes a drain discharge unit configured to discharge the drain tank at the drain discharge unit. The drain is drained to the tracking circuit, and the drainage operation is performed to drain the drain discharged to the tracking circuit at the drain.

  According to this characteristic configuration, the remedy heating section is configured to include a latent heat recovery type heat exchanger, so that latent heat can also be used to heat hot water in the bathtub, thereby saving energy. be able to. Since drain is generated by exchanging heat with a latent heat recovery type heat exchanger, it is necessary to drain the drain stored in the drain tank somewhere. Then, an operation control part performs drain drain operation which drains the drain of a drain tank in a circulation circuit for draining in a drain discharge part, and drains the drain discharged in the circulation circuit for tracking in a drainage part. Accordingly, the drain stored in the drain tank can be removed from the outside of the bathtub while simplifying the configuration by using the drain circuit for draining the hot water remaining in the memorial circuit and the memorial circuit. Can be drained.

The figure which shows schematic structure of a memorial device Flow chart showing operation in memorial operation

An embodiment of a memorial device according to the present invention will be described with reference to the drawings.
This remedy device connects a heat source device D installed outside the bathroom Y and having a remedy heating unit B, and a remedy heating unit B in the heat source device D and the bathtub 5 installed in the bathroom Y. And a memorial circuit 4 for circulating hot water in the bathtub 5. And about the bathtub 5, it is comprised by the highly insulated bathtub ("highly insulated bathtub" prescribed | regulated by JISA5532).

  The heat source unit D includes a hot water supply unit C that supplies hot water heated by the hot water supply heating unit A to the bathtub 5, and a reheating heating unit B that heats the hot water in the middle of the recirculation circuit 4. I have. The hot water supply heating section A includes a gas combustion burner g1, a main heat exchanger N1 arranged in two stages, and a latent heat recovery heat exchanger N2 as a latent heat recovery type heat exchanger. The hot water supply heating unit A is configured to heat water from the water supply channel 1 and supply the heated hot water to the bathtub 5, the hot water tap 2 or the like. As with the hot water supply heating section A, the reheating heating section B also has a gas combustion burner g2, a main heat exchanger N1 arranged in two stages, and a latent heat recovery heat exchange as a latent heat recovery heat exchanger. And a container N2. The remedy heating section B is configured to heat hot water in the remedy circulation path 4 and supply the heated hot water to the bathtub 5. The combustion exhaust gas after the heat exchange in the latent heat recovery heat exchanger N2 in the hot water supply heating part A and the reheating heating part B is configured to be discharged to the outside through the exhaust passage 7.

  The latent heat recovery heat exchanger N2 produces drainage, which is acidic condensate, which is combustion product water, and this drain is collected by the drain pan 8 and neutralized by the neutralizer 9, and then into the drain tank DT. It is configured to store. Although not described in detail, the neutralizer 9 is loaded with a neutralizing agent (for example, calcium carbonate) that neutralizes condensed water.

  A gas supply path G for supplying general household fuel gas to each of the burners g1 and g2 is connected to the hot water heater A and the reheating heater B, and an electromagnetic gas proportional to adjust the fuel gas supply amount. A valve 10 and an intermittent valve 11 for intermittently supplying fuel gas are provided. Combustion fans 12 for supplying combustion air to the burners g1 and g2 are also provided. Although not shown, the ignition igniter for performing an ignition operation on the burner g1 is ignited near the burner g1. A frame rod or the like for detecting this is provided.

  The hot water supply heating section A is connected to the hot water supply path 1 and the hot water supply path 3 for discharging hot water after heating after passing through the main heat exchanger N1 and the latent heat recovery heat exchanger N2, and is supplied through the hot water supply path 1. The water is heated to a desired temperature by the heat exchangers N1 and N2, and hot water at the desired temperature is supplied through the hot water supply passage 3.

  The water supply channel 1 is provided with a water supply thermistor 13 for detecting the water supply temperature and a water amount sensor 14 for detecting the water supply amount. The water supply thermistor 13 and the water supply channel 3 downstream of the water amount sensor 14 are heated. It connects via the water supply bypass 15 so that the exchangers N1 and N2 may be bypassed.

  In the hot water supply path 3, the hot water thermistor 16 that detects the temperature of the hot water from the hot water supply heating part A, and the mixing ratio of the amount of hot water from the hot water supply heating part A and the amount of water from the water supply bypass path 15 in order from the upstream side. A mixing valve 17 to be adjusted, a hot water thermistor 18 that detects the temperature of hot water after mixing by the mixing valve 17, a water proportional valve 19 that adjusts the amount of hot water, and an interrupt water amount sensor 20 that detects an interruption of general hot water supply And are provided.

  A hot water supply passage 22 for supplying hot water from the hot water supply passage 3 to the bathtub 5 is branched and connected to the hot water supply passage 3 between the water proportional valve 19 and the interrupt water amount sensor 20. A bath return path 23 from the bathtub 5 and a bathtub outbound path 24 are connected to the heating section B for the commemoration, and a circulation circuit 4 for commemoration is configured from the bathtub return path 23 and the bathtub outbound path 24. ing.

  In the bathtub return path 23, in order from the upstream side, a water level sensor 27 that detects the water level of the bathtub 5 by detecting pressure, a return thermistor 28 that detects the temperature of the hot water in the bathtub 5, and the bathtub return path 23. An electromagnetic bath two-way valve 29 that opens and closes, a circulation pump 26 for remedy, and a water flow switch 30 are provided, and a forward thermistor 31 is provided in the bathtub outward path 24.

  The hot water filling path 22 is connected to a bathtub return path 23 between the remedy circulation pump 26 and the water flow switch 30. The hot water filling passage 22 is provided with a hot water filling solenoid valve 32 for opening and closing the hot water filling passage 22 from the upstream side, and a hot water filling check valve 33. An air layer forming hopper 34 communicating with the hot water filling path 22 is interposed in the hot water filling path 22 between the hot water solenoid valve 32 and the hot water check valve 33. The air layer forming hopper 34 includes a hopper drainage channel 35 for draining hot water and an electromagnetic hopper drainage valve 36 for opening and closing the hopper drainage channel 35, and an end of the hopper drainage channel 35. The section is connected to a bathtub return path 23 between the bath two-way valve 29 and the memorial circulation pump 26.

  The bathtub outbound path 24 is provided with a drain valve 37 (corresponding to a drainage section) that drains hot water from the memorial circuit 4 to the outside of the bathtub 5 from an intermediate portion thereof. The drain valve 37 is constituted by a three-way valve, and is configured to supply hot water from the bathtub outbound path 24 to the bathtub 5 and to an outlet provided in the drain pan 40 of the bathtub outbound hot water 24 from the bathtub outbound path 24. It is configured to be switchable to a state of draining to 38. The drainage valve 37 is provided in the front part of the bathtub in front of the bathtub 5 in the bathtub outgoing path 24, and does not supply substantially the entire amount of hot water in the circulation circuit 4 to the outlet 5 without supplying it to the bathtub 5. It is configured to allow drainage.

  The drain tank DT is connected to a portion upstream of the water level sensor 27 of the bathtub return passage 23 by a tank connection passage 39, and a drain discharge valve 21 is provided at the connection portion. This drain discharge valve 21 is constituted by a three-way valve, and the state where the hot water in the bathtub return path 23 is allowed to flow through the bathtub return path 23 and the drain from the tank connection path 39 are returned to the bathtub return path 23. It is configured to be switchable to a state to be supplied to the vehicle. Thus, the drain discharge portion that discharges the drain stored in the drain tank DT to the midway portion of the tracking circulation path 4 includes the tank connection path 39 and the drain discharge valve 21.

  An operation control unit H1 for controlling the operation of the heat source device D is provided, and the operation control unit H1 is configured by a program control type controller including a microcomputer. The operation control unit H1 is configured to be able to communicate with a remote control device R1 installed on a wall surface in the bathroom Y. Although illustration is omitted, the remote control device R1 includes an operation switch for instructing start and stop of operation, an automatic switch for instructing automatic bath operation, a memorial switch for instructing memorial operation, and the like.

(General hot water operation)
The operation control unit H1 is in a controllable state when the operation switch of the remote control device R1 is turned on, and performs a general hot water supply operation of supplying hot water from the hot water tap 2 when the hot water tap 2 is opened. In this general hot water supply operation, when the hot water tap 2 is opened and the amount of water detected by the water amount sensor 14 exceeds a predetermined amount, after the combustion fan 12 in the hot water supply heating section A is driven, the intermittent valve 11 is opened, and the gas proportional The opening of the valve 10 is adjusted and the burner g1 is ignited by the igniter, and the hot water detected by the hot water thermistor 18 based on the detected water temperature by the hot water thermistor 13, the hot water temperature by the hot water thermistor 16, the detected water volume by the water sensor 14, etc. The opening degree of the gas proportional valve 10 and the opening degree of the mixing valve 17 are controlled so that the temperature becomes the set temperature set by the remote control device R1. Then, when water flow is no longer detected by the water amount sensor 14, the operation control unit H1 closes the gas proportional valve 10 and the intermittent valve 11 to stop the combustion of the burner g1, and the combustion fan 12 also stops. End the general hot water supply operation.

(Bath automatic operation)
When the automatic switch of the remote control device R1 is turned on, the operation control unit H1 performs bath automatic operation. In this bath automatic operation, first, automatic hot water filling processing is executed. In this automatic hot water filling process, the operation control unit H1 opens the hot water solenoid valve 32 and controls the heating by the hot water supply heating unit A in the same manner as in the general hot water supply operation. The bathtub return path 23 and the bathtub return path 24 are supplied to the bathtub 5 and the bathtub return path 23 and the bathtub return path 24 are supplied to the bathtub 5. Then, when the detected water level of the water level sensor 27 becomes equal to or higher than the set water level by the remote controller R1, the operation control unit H1 closes the hot water solenoid valve 32, stops the heating by the hot water supply heating unit A, and moves to the bathtub 5. The automatic hot water filling process is terminated. Thus, when the automatic filling process to the bathtub 5 is completed, the operation control unit H1 drives the remedy circulation pump 26 when the detection temperature of the return thermistor 28 is lower than the set temperature. The hot water of the tub 5 is circulated by the remedy circuit 4 of the return path 23 for tub and the forward path 24 for tub, and the heating unit for remedy until the temperature detected by the return thermistor 28 reaches the set temperature by the remote control device R1. A circulation heating process for heating the hot water in the memory circuit 4 is performed by B. When the temperature detected by the return thermistor 28 reaches the temperature set by the remote control device R1, the operation control unit H1 stops the circulation pump 26 and ends the circulation heating process.

(Memorial operation)
If the automatic switch is turned on after the bath automatic operation described above is performed, the operation control unit H1 operates the recirculation circulation pump 26 every time the set time elapses, and returns the thermistor 28. When it is determined that the detected temperature is lower than the temperature set by the remote control device R1, the hot water in the bathtub 5 is tracked. Here, since the bathtub 5 is composed of a highly heat-insulated bathtub, the amount of heat released from the hot water is larger in the memorial circuit 4 than in the bathtub 5, and the elapsed time since the memorial was performed. Is longer, the hot water in the memorial circuit 4 may be cooler than the hot water in the bathtub 5. Therefore, in the tracking device according to the present invention, the elapsed time since the operation control unit H1 performed the previous tracking can be changed according to the drainage elapsed time (for example, 1 hour). When the temperature reaches the value, as a reheating operation for heating the hot water in the bathtub 5, first, the waste water treatment is performed, then the circulation heating treatment is performed, and finally, the pouring treatment is performed.

The operation of the chasing operation will be described based on the flowchart of FIG.
First, the operation control unit H1 performs drainage processing for supplying hot water in the bathtub 5 to the remedy circulation path 4 and draining hot water in the remedy circulation path 4 using the drain valve 37 (step # 1). In this wastewater treatment, the operation control unit H1 operates the recirculation circulation pump 26 and switches the drainage valve 37 to a state in which the hot water in the bathtub outward passage 24 is drained to the discharge port 38, whereby the hot water in the bathtub 5 is discharged. The hot water remaining in the memorial circuit 4 is pushed out by supplying the hot water and the hot water remaining in the memorial circuit 4 is drained from the drain valve 37 to the discharge port 38. I am doing so.

  Then, the operation control unit H1 increases the temperature of the return thermistor 28 from the start of the waste water treatment based on the detection information of the return thermistor 28 (corresponding to the temperature sensor) provided in the middle part of the memorial circuit 4. The duration for wastewater treatment is set based on the elapsed time until detection of the wastewater treatment, and when the duration of wastewater treatment reaches the duration for wastewater treatment, the wastewater treatment is terminated and the circulation heating treatment is started. (In the case of Yes in step # 2, step # 3).

An explanation will be given on the setting of the duration for wastewater treatment.
In the wastewater treatment, the hot water remaining in the remedy circulation path 4 is drained by supplying hot water from the bathtub 5, so that the hot water remaining in the remedy circulation path 4 is sequentially added from the bathtub 5 side at the start of the drainage treatment. It is replaced with hot water. Here, since the bathtub 5 is composed of a highly heat-insulated bathtub, the amount of heat radiation from the hot water circulation circuit 4 is larger than that of the bathtub 5, and the hot water of the hot water circulation circuit 4 is larger. Is cooler than the hot water in the bathtub 5. Therefore, when the detection target of the return thermistor 28 changes from the remaining hot water to the hot water of the bathtub 5, the detection temperature of the return thermistor 28 rises. Therefore, the operation control unit H1 detects that the detected temperature of the return thermistor 28 has risen, so that the portion from the bathtub 5 to the installation location of the return thermistor 28 in the memorial circuit 4 remains in the low temperature hot water. It can be determined that the hot water of the bathtub 5 has been replaced. Therefore, the operation control unit H1 measures the elapsed time from the start of the waste water treatment (the start of operation of the recirculation circulation pump 26) until it is detected that the detection temperature of the return thermistor 28 has increased. The duration for wastewater treatment is set based on the elapsed time. For example, since the heat source device D and the bathtub 5 are connected by the bathtub return path 23 and the bathtub outbound path 24 having the same length, the return thermistor 28 is installed in the circuit circulation path 4. Assuming that the location is substantially in the center, a time obtained by doubling the above-described elapsed time is set as the duration time for wastewater treatment. Alternatively, in consideration of the length of the pipe in the heat source unit D, the time required for draining the hot water remaining in the pipe in the heat source unit D is added to the time obtained by doubling the above-mentioned elapsed time, and the waste water treatment. You can also set the duration for use.

  In this way, when the operation control unit H1 sets the duration for wastewater treatment, when the duration for wastewater treatment elapses from the start point of the wastewater treatment (the start point of operation of the recirculation circulation pump 26), the wastewater treatment is performed. And the circulating heating process is started. In this circulation heating process, the operation control unit H1 continues the operation of the recirculation circulation pump 26 to circulate hot water in the bathtub 5 through the recirculation circulation path 4, and the detected temperature of the return thermistor 28 is controlled by the remote control device. The hot water of the remedy circulation path 4 is heated by the remedy heating section B until the temperature reaches the set temperature by R1.

  When the temperature detected by the return thermistor 28 reaches the temperature set by the remote control device R1 and the circulation heating process ends, the operation control unit H1 supplies the hot water heated by the hot water supply heating unit A to the bathtub 5 in the hot water supply unit C. A pouring process is performed (step # 4). In this pouring process, as in the automatic hot water filling process, the operation control unit H1 opens the hot water filling solenoid valve 32 and controls the heating by the hot water heating unit A in the same manner as in the general hot water supply operation. Is supplied to the bathtub return path 23 and the bathtub return path 24 via the hot water filling path 22, and is supplied to the bathtub 5 from both the bathtub return path 23 and the bathtub return path 24. Here, as the pouring process, instead of the hot water heated in the hot water supply heating part A, water that is not heated in the hot water supply heating part A in the hot water supply part C may be supplied to the bathtub 5. In this case, the operation control unit H1 opens the hot water filling solenoid valve 32 and does not heat the hot water supply heating unit A, but the hot water filling route 22, the bathtub return passage 23, and the bathtub outgoing route 24. Add water to the bathtub 5 through the water operation.

  Then, the operation control unit H1 supplies hot water to the bathtub 5 at the hot water supply unit C by an amount corresponding to the amount of water discharged by the drain valve 37 in the waste water treatment. For example, by continuing the hot water pouring process until the water level detected by the water level sensor 27 reaches the water level at the start of the waste water treatment, hot water is supplied to the bathtub 5 by an amount corresponding to the amount of water drained by the drain valve 37 in the waste water treatment. be able to. In addition, for example, the flow rate when supplying hot water to the bathtub 5 at the hot water supply portion C (for example, the flow rate detected by the water amount sensor provided in the hot water supply passage 22 is omitted) by the hot water supply portion C. By continuing the pouring process until the value multiplied by the elapsed time from the start of the supply of hot water to the bathtub 5 reaches the pre-determined amount of retained water in the recirculation circuit 4 as a whole, The hot water can be supplied to the bathtub 5 by the amount of water corresponding to the amount of water discharged by the drain valve 37. By the way, the amount of water retained in the recirculation circuit 4 as a whole can be obtained from the pipe length of the recirculation circuit 4 in the state where the heat source device D is installed, the pipe diameter thereof, and the like.

  The above-described chasing operation is not limited to the case where the elapsed time since the last chasing has reached the elapsed time for drainage with the automatic switch turned on, and the chasing switch of the remote control device R1 is turned on. In this case, the operation control unit H1 performs the above-described chasing operation. In this way, when the elapsed time since the last tracking is performed with the automatic switch turned on reaches the elapsed time for drainage, or when the tracking switch of the remote control device R1 is turned on. The operation control unit H1 performs the chasing operation on the assumption that the low temperature condition that the hot water remaining in the chasing circulation path 4 is lower than the hot water of the bathtub 5 is satisfied. Thereby, only when there is a possibility that the hot water of the memorial circuit 4 is lower in temperature than the hot water of the bathtub 5 and the hot water of the cold water is supplied to the bathtub 5, the waste water treatment, the circulation heating treatment, It is possible to perform a chasing operation that sequentially performs the pouring process. Therefore, the hot water of the tub 5 is appropriately drained without wastefully draining the water in the tub 5 and without giving the user bathing in the tub 5 unpleasant feeling such as cold water. be able to.

  In addition, the operation control unit H1 determines that the low temperature condition is not satisfied, such as when the elapsed time since the last tracking was performed with the automatic switch being turned on reaches the elapsed time for drainage. Only the circulation heating process is performed without performing the process and the pouring process.

(Drain drainage operation)
When the drain discharge condition is satisfied, the operation control unit H1 discharges the drain of the drain tank DT to the remedy circulation path 4, and drains the drain discharged to the remedy circulation path 4 by the drain valve 37. The drainage operation is performed. Here, regarding drain drainage conditions, for example, when the drain storage amount of the drain tank DT becomes full, it can be assumed that the drain drainage conditions are satisfied. Even when the automatic switch is turned ON, the drain drainage operation can be performed prior to the bath automatic operation, assuming that the drain drainage condition is satisfied. In this drain discharge operation, the operation control unit H1 switches the drain discharge valve 21 to a state in which the circulation pump 26 for remedy is operated and the drain from the tank connection path 39 is supplied to the return path 23 for the bathtub. By switching the drain valve 37 so that the hot water in the outgoing path 24 is drained to the discharge port 38, the drain of the drain tank DT is discharged to the remedy circulation path 4 through the tank connection path 39. The discharged drain is drained to the discharge port 38.

  In this way, the drain valve 37 and the recirculation pump 26 are not only used for draining hot water in the recirculation circuit 4 in the waste water treatment in the retreat operation, but also in the drain tank DT in the drain drain operation. Therefore, drainage of hot water and drainage of the memorial circuit 4 can be appropriately performed while simplifying the configuration.

[Another embodiment]
(1) In the said embodiment, it can change suitably about how wastewater treatment continuation time is set. For example, since the piping length of the memorial circuit 4 can be grasped at the time of installation of the heat source device D, the pipe length and the pressure loss of the memorial circuit 4 when the memorial circulation pump 26 is operated. For example, the time required for draining the retained water amount of the entire memorial circuit 4 can be obtained in advance, and the obtained time can be set as the drainage treatment duration time.

(2) In the above embodiment, the water level sensor 27 detects the water level of the bathtub 5 so as to grasp the amount of hot water supplied to the bathtub 5. It is also possible to provide a water amount sensor upstream of 32 and to grasp the hot water supply amount to the bathtub 5 based on the detected flow rate of the water amount sensor. In this case, in the pouring process, a value obtained by multiplying the detected flow rate of the water amount sensor by the elapsed time from the start of the supply of hot water to the bathtub 5 by the hot water supply unit C is obtained in advance. By continuing the pouring process until the amount of water retained by the entire 4 is reached, hot water can be supplied to the bathtub 5 by an amount corresponding to the amount of water discharged by the drain valve 37 in the waste water treatment.

  The present invention is provided with a recirculation circuit for circulating hot water in a bathtub and a reheating heater for heating hot water at a midway portion of the recirculation circuit, and a highly insulated bathtub is used. In addition, the present invention can be applied to various types of chasing devices that can appropriately perform chasing of hot and cold water in a bathtub without causing discomfort to the user.

4 Remembrance circuit 5 Bath 21 Drain discharge valve (drain discharge part)
28 Return thermistor (temperature sensor)
37 Drain valve (drainage part)
39 Tank connection (drain discharge part)
A Heating unit for hot water supply B Heating unit for reheating C Hot water supply unit DT Drain tank H1 Operation control unit N2 Latent heat recovery heat exchanger (latent heat recovery type heat exchanger)

Claims (5)

A remedy device provided with a circulation circuit for circulating hot water in a bathtub and a remedy heating unit for heating hot water at a midway portion of the circulation circuit,
The memorial circulation path includes a bathtub return path to which hot water in the bathtub is supplied, and a bathtub outward path for supplying hot water to the bathtub,
A drainage part for draining hot water of the memorial circuit to the outside of the bathtub , in a bathtub front part of the bathtub forward path before the bathtub ,
The hot water before Symbol tub as add-fired operation to add fired, first, draining hot water remaining in the add焚用circulation hot water of the bathtub in the supplies to add焚用circulation path the drainage unit draining An operation control unit that performs a circulation heating process of circulating the hot water in the bathtub in the circulation circuit and heating the hot water in the heating unit ,
A temperature sensor for detecting the temperature of hot water is provided in the middle of the circulation path for the memorial circuit, and the operation control unit is based on an elapsed time from the start of the waste water treatment until a temperature increase is detected by the temperature sensor. The wastewater treatment duration is set, and when the duration of the wastewater treatment reaches the duration of the wastewater treatment, the wastewater treatment is terminated and the circulation heating treatment is started. apparatus. The operation control unit performs the chasing operation when the low temperature condition in which the hot water remaining in the chasing circulation path is lower than the hot water of the bathtub is satisfied, and the low temperature condition The remnant device according to claim 1 , which is configured to perform only the circulating heat treatment without performing the wastewater treatment when the condition is not satisfied. A remedy device provided with a circulation circuit for circulating hot water in a bathtub and a remedy heating unit for heating hot water at a midway portion of the circulation circuit,
The memorial circulation path includes a bathtub return path to which hot water in the bathtub is supplied, and a bathtub outward path for supplying hot water to the bathtub,
A drainage part for draining hot water of the memorial circuit to the outside of the bathtub, in a bathtub front part of the bathtub forward path before the bathtub,
As a memorial operation for chasing hot water in the bathtub, first, drainage treatment for supplying hot water in the bathtub to the memorial circuit and draining hot water remaining in the memorial circuit in the drainage section. Next, an operation control unit is provided that performs a circulating heating process in which hot water in the bathtub is circulated in the remedy circulation path and the hot water is heated in the remedy heating unit,
The operation control unit performs the chasing operation when the low temperature condition in which the hot water remaining in the chasing circulation path is lower than the hot water of the bathtub is satisfied, and the low temperature condition If the condition is not satisfied, the apparatus is configured to perform only the circulating heat treatment without performing the waste water treatment. A hot water supply unit that supplies hot water heated by a hot water supply heating unit to the bathtub is provided, and the operation control unit performs heating in the hot water supply heating unit in water or the hot water supply unit after performing the circulation heating process. The remedy apparatus of any one of Claims 1-3 comprised so that the pouring process which supplies the performed hot water to the said bathtub may be performed.   The remedy heating unit includes a latent heat recovery type heat exchanger, and includes a drain tank for storing drain generated in the latent heat recovery type heat exchanger, and a drain stored in the drain tank. And a drain discharge part that discharges the drain tank to the middle part of the recirculation circuit, and the operation control part causes the drain discharge part to discharge the drain of the drain tank to the recirculation circuit. The remedy device according to any one of claims 1 to 4, wherein the remedy device is configured to perform a drainage operation for draining the drain discharged to the remedy circulation path at a section.

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