JP6817475B2 - Heat source device and its pouring method - Google Patents

Description

The present invention relates to, for example, a heat source device for heating water supply and reheating bathtub water with a common heat source, and relates to a technique for pouring hot water into a bathtub using a reheating pipeline.

Heat source devices include so-called one-can and two-water that perform hot water supply heating and reheating heating with a common heat source, and so-called one-can and three-water that supply heat to the heating load in addition to these functions. is there. In this heat source device, a part of the reheating pipeline is used as a hot water pouring flow path in order to pour hot water heated by heat exchange to the bathtub side. The reheating pipeline is equipped with a reheating heat exchanger that uses the same heat source as the hot water supply heating, and the hot water flowing into the reheating pipeline is reheated when passing through this reheating heat exchanger. To. Therefore, at the stage of filling the bathtub with hot water, hot water may be poured in a state of being heated to a temperature higher than the set temperature of the hot water filling.

Regarding hot water pouring using such a reheating pipeline, an electromagnetic valve is provided in the hot water filling passage and the conduit on the inlet side of the reheating heat exchanger, and when hot water is filled, this solenoid valve is closed. Some reheating heat exchangers do not allow hot water to flow (for example, Patent Document 1).

JP-A-10-073312

If the solenoid valve installed in the reheating pipeline is opened and closed to prevent the poured hot water from flowing into the reheating heat exchanger side, the parts cost and installation cost of the heat source device will increase, and the reheating will increase. This will lead to an expansion of the installation space for the pipeline. Further, the heat source device has to control the opening and closing of the solenoid valve every time a hot water pouring request is generated, which causes a problem that processing such as operation control becomes complicated.

Further, in the pouring treatment, for example, there is a method of heating at a temperature lower than the set temperature of the pouring request, assuming that it is reheated in advance. However, in the heat source device, the combustion amount of the heat source is estimated in consideration of, for example, the flow rate of the water supply, the temperature at the time of water supply, and the heat exchange efficiency at the time of reheating the pouring water, which complicates the processing contents. , There is a problem that it is difficult to match the set temperature of pouring.

Further, in the heat source device, when the combustion amount and the pouring amount are controlled assuming reheating, there is a problem that the hot water supply request generated at the same time as the pouring cannot be sufficiently met. In the pouring process assuming reheating, the temperature is set to be lower than the required pouring temperature in the first heat exchange. Therefore, if the hot water heated for pouring is flowed to the hot water supply side, hot water having a temperature significantly different from the required hot water supply temperature will be supplied. If the hot water pouring process is interrupted in order to prioritize the hot water supply request, there is also a problem that the convenience of the heat source device is lowered due to the increase in the time required for filling the bathtub with hot water.

Therefore, in view of the above problems, an object of the present invention is to stabilize the pouring temperature and to simplify the pouring function of the heat source device.

Another object of the present invention is to improve the convenience of the heat source device.

In order to achieve the above object, according to one aspect of the heat source device of the present invention, a heat source that heats a reheating heat exchanger that heats bath water and a heat exchanger that heats a heat medium or water supply with a common heat source. A reheating pipeline having a first pipeline which is a conduit for returning the tub water to the tub side, a second pipeline for flowing the tub water to the reheating heat exchanger side, and the above. The hot water supply pipe for flowing hot water heated by the heat exchanger, the hot water pouring pipe for pouring the hot water from the hot water supply pipe to the reheating pipe, and the second pipe are connected to the additional pipe. A bypass path for passing the hot water by bypassing the heat exchanger, and a flow direction regulating means provided in the bypass path to regulate the flow direction of the hot water from the first pipeline to the second pipeline side. When heating the tub water, the flow direction is restricted so that the tub water bypasses the reheating heat exchanger from the second pipeline and flows into the first pipeline by the bypass path. When the hot water is poured from the pouring pipeline into the reheating pipeline by blocking by means, the hot water from the pouring pipeline is allowed to flow into the first pipeline of the reheating pipeline, and the above. The hot water may be poured into the bathtub from both the first pipe line and the second pipe line by flowing the water through the second pipe line.

In the heat source device, an opening / closing means that is installed in the second pipeline provided with a water level detecting means for detecting the bathtub water level and opens / closes the pipeline, and the opening / closing means that closes the opening / closing means at the time of pouring. A control unit that controls the amount of hot water poured into the bathtub according to the bathtub water level detected by the water level detecting means may be provided.

In the heat source device, the control unit may further close the opening / closing means in response to a hot water supply request during hot water pouring into the bathtub, and may supply hot water from the hot water supply pipeline together with hot water pouring into the bathtub.

In the heat source device, the control unit can select either the hot water injection set temperature or the hot water supply set temperature in response to the hot water supply request during the hot water supply to the bathtub, and the heat source can be selected according to the set temperature. The amount of combustion may be controlled.

The heat source device is further provided with a backflow preventing means, which is installed in the first pipeline and prevents the hot water from the pouring pipeline from flowing back to the reheating heat exchanger side. When the hot water is poured from the hot water injection pipe into the reheating pipe, the backflow blocking means may be used to prevent the hot water from flowing into the reheating heat exchanger side.

In the heat source device, a check valve or a two-way valve for blocking backflow may be used as the check valve or the flow direction regulating means.

In order to achieve the above object, according to one aspect of the hot water pouring method of the heat source device of the present invention, a reheating heat exchanger that heats the bath water and a heat exchanger that heats the heat medium or the water supply are common heat sources. It is a method of pouring hot water of a heat source device heated by, at least a step of flowing hot water heated by the heat exchanger to a hot water supply pipe, and a first pipe and a bathtub which are pipes for returning bath water to the bath side. A step of pouring the hot water from the hot water supply pipe into the reheating pipe having a second pipe for flowing water to the reheating heat exchanger side, and the reheating pipe from the pouring pipe. When the hot water is poured into the water, the hot water from the pouring pipeline is allowed to flow into the first pipeline of the reheating pipeline, and is connected to the second pipeline to connect the reheating heat exchanger. The step of pouring hot water into the bathtub from both the first pipeline and the second pipeline by flowing the water into the second pipeline by the bypass path to be bypassed, and when heating the bath water, the bypass path. The flow direction regulating means provided in the above prevents the bath water from passing through the bypass path, bypassing the reheating heat exchanger from the second line, and flowing into the first line. It may include the process.

According to the present invention, any of the following effects can be obtained.

(1) Regarding the hot water pouring function to the bathtub side using the reheating pipeline, it is possible to prevent the hot water from being reheated by the reheating heat exchanger, and the bathtub can be filled with hot water at the set temperature.

(2) It is possible to prevent the hot water passing through the reheating pipeline from flowing into the reheating heat exchanger side by using the backflow blocking means having a simple structure, and the cost of the heat source device can be reduced and the control process can be performed. It can be simplified.

(3) If a hot water supply request occurs during hot water pouring, hot water pouring and hot water supply can be performed at the same time at a temperature close to the required temperature, which enhances the convenience of the heat source device.

(4) In the reheating process, the circulation amount of bathtub water in the reheating pipeline can be increased, and the efficiency during the reheating operation can be improved.

And other objects, features and advantages of the present invention will be further clarified by reference to the accompanying drawings and each embodiment.

It is a figure which shows the heat source apparatus which concerns on 1st Embodiment. It is a figure which shows the heat source apparatus which concerns on 2nd Embodiment. It is a figure which shows the pouring flow path of a heat source apparatus. It is a figure which shows an example of the control part. It is a flowchart which shows an example of fully automatic operation. It is a sub-flow chart including the initial operation of the pouring process. It is a sub-flow chart including water level monitoring and flow rate correction processing of pouring processing. It is a figure which shows the Example of the pouring flow path. It is a figure which shows an example of another heat source apparatus. It is a figure which shows an example of a pouring flow path. It is a figure which shows the Example of another pouring flow path. It is a figure which shows an example of another heat source apparatus.

[First Embodiment]

FIG. 1 shows an example of the heat source device 2 according to the first embodiment, for example, pouring hot water supplied from the water supply heating function, the bathtub reheating function, and the water supply function side into the bathtub. It has a hot water function.

As shown in FIG. 1, for example, the heat source device 2 includes a reheating heat exchanger 6 and a heat exchanger 8 in the vicinity of the burner 4. The reheating heat exchanger 6 and the heat exchanger 8 heat the bathtub water BW and the clean water W flowing inside by exchanging heat with the high-temperature combustion exhaust gas discharged from the burner 4.

The burner 4 is an example of the heat source of the present disclosure, and burns the fuel gas G supplied through a fuel flow path, a fuel valve, or the like (not shown) to generate combustion exhaust.

The bath water BW flows into the reheating heat exchanger 6 through the reheating pipe line 14. The bath water BW is heated when passing through the reheating heat exchanger 6.

The heat exchanger 8 exchanges heat with the combustion exhaust for the clean water W that has flowed in through the water supply pipeline. A water supply line and a hot water supply line 10 are connected to the heat exchanger 8. The water supply line is connected to, for example, a water supply. In addition to being connected to the hot water supply means of the heat source device 2, the hot water supply pipe 10 is connected to a hot water pouring pipe 12 which is partially branched and pours hot water toward the bathtub. The heated hot water HW is flowed through the hot water supply pipe 10 to the hot water supply pipe 12 side in response to the hot water supply load such as the hot water supply port and the shower and the hot water pouring request of the bathtub. The hot water pouring pipeline 12 is connected to the pipeline 14-1 side for returning the bathtub water BW heated by the reheating heat exchanger 6 to the bathtub side.

The reheating heat exchanger 6 and the heat exchanger 8 may be arranged in a common combustion chamber through which the combustion exhaust of the burner 4 flows. Further, the reheating heat exchanger 6 and the heat exchanger 8 may be provided with, for example, endothermic fins on their surfaces.

Backflow prevention means 18 is installed in the pipeline 14-1. The check valve 18 is an example of a means for preventing hot water flowing through the pipeline 14-1 from flowing back to the reheating heat exchanger 6, and a check valve, a two-way valve, or the like is used. The backflow blocking means 18 is installed in the backflow blocking area 16 between the connecting portion P1 where the pouring pipe line 12 joins the pipe line 14-1 and the reheating heat exchanger 6. Further, the installation position of the backflow blocking means 18 is preferably a position close to the connecting portion P1 in the backflow blocking area 16. As a result, the influence of the heat from the reheating heat exchanger 6 on the hot water HW poured into the pipeline 14-1 side can be reduced.

Further, the pipeline 14-1 is provided with a bypass passage 20 connected to the pipeline 14-2 through which the bath water BW flows toward the reheating heat exchanger 6 side. The bypass path 20 is a pipeline branched between the connecting portion P1 of the pipeline 14-1 and the bathtub. This bypass path 20 is an example of means for flowing the bathtub water BW and the hot water HW by bypassing the reheating heat exchanger 6, and a part of the hot water HW flowing through the pipeline 14-1 is directed to the pipeline 14-2 side. Branch and flow. On the bypass path 20, for example, a flow direction regulating means 22 for regulating the flow of hot water HW and bathtub water BW is provided. The flow direction regulating means 22 regulates the flow of hot water HW from the pipeline 14-1 to the pipeline 14-2 through the bypass path 20. Further, the flow direction regulating means 22 prevents the bath water BW from flowing from the pipe line 14-2 to the pipe line 14-1 through the bypass path 20.

The bypass passage 20 may be formed with a pipe diameter equivalent to that of the pipe line 14-1, for example, or may be formed with a different pipe diameter depending on the amount of hot water to be poured. That is, if the pipe diameter of the bypass path 20 is set smaller than that of the pipeline 14-1, the poured hot water can flow more toward the pipeline 14-1 than the bypass passage 20, and vice versa. It holds.

As a result, the heat source device 2 serves as a flow path for pouring the hot water HW into the bathtub as a first flow path in which a part or all of the hot water HW is flowed to the pipeline 14-1 side after passing through the connection portion P1. , A second flow path is provided in which part or all of the hot water HW is flowed into the pipeline 14-2 through the bypass path 20. When the hot water HW is flowed using the second flow path, the pipe line 14-2 is backflowed with respect to the flow direction in which the bathtub water BW is flowed at the time of reheating.

Hot water poured into only one or both of the first flow path and the second flow path may be discharged to the bathtub side.

<Effect of the first embodiment>

(1) The hot water pouring pipeline 12 is connected to the pipeline 14-1, and the reheating heat exchanger 6 is provided with a backflow preventing means 18 between the connecting portion P1 and the reheating heat exchanger 6. Reheating of hot water can be prevented.

(2) By not passing the hot water poured into the reheating heat exchanger 6 side, the bathtub can be filled with hot water at the set temperature.

(3) In the hot water injection process, it is possible to prevent hot water from flowing to the reheating heat exchanger 6 side without opening and closing the solenoid valve, and the cost of the heat source device can be reduced. Since it is not necessary to control the opening and closing of the valve, the processing can be simplified and the speed can be improved.

[Second Embodiment]

FIG. 2 shows an example of the heat source device according to the second embodiment. In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals.

The heat source device 30 includes a combustion chamber 32 provided with a burner 4. A reheating heat exchanger 34 and a heat exchanger 36 are installed in the combustion chamber 32 to exchange heat with the combustion exhaust of a common burner 4. The reheating heat exchanger 34 and the heat exchanger 36 may be integrally formed in, for example, the combustion chamber 32.

The heat exchanger 36 is an example of means for heat exchange of the inflowing clean water W. A water supply line 38 for flowing clean water W is connected to the heat exchanger 36 on the inflow side. The water supply line 38 is connected to, for example, a water supply, and allows the clean water W to flow to the heat exchanger 36 side. A temperature sensor 40 and a water amount sensor 42 are installed in the water supply line 38. The temperature sensor 40 is an example of a means for detecting the temperature of the clean water W that has flowed into the water supply line 38. The water amount sensor 42 is an example of a means for monitoring the start of water supply and the amount of flowing water.

A hot water supply pipe line 10 is connected to the outlet side of the heat exchanger 36. A temperature sensor 44, a water supply bypass path 46, a switching valve 48, and a temperature sensor 50 are installed in the hot water supply line 10, and a hot water pouring line 12 is connected to the hot water supply line 10. The temperature sensor 44 is an example of means for detecting the temperature of the hot water HW after heat exchange. The water supply bypass path 46 is an example of a pipeline that is connected to the water supply pipeline 38, bypasses the heat exchanger 36, and allows the clean water W before heating to flow into the hot water supply pipeline 10 side. The switching valve 48 is installed at a connection position between the hot water supply pipe line 10 and the water supply bypass path 46, and is an example of means for adjusting the mixing amount of the heated hot water water HW and the clean water W. The temperature sensor 50 is an example of a means for detecting the temperature of the hot water HW mixed with cold water, and is used for monitoring, for example, whether or not the hot water supply required temperature or the hot water pouring temperature.

The hot water pouring pipe 12 connected to the hot water supply pipe 10 is provided with an on-off valve 52 and a hot water pouring amount sensor 54. The on-off valve 52 is an example of a means for adjusting the amount of hot water poured. The hot water injection amount sensor 54 is an example of means for detecting the flow rate of the hot water HW flowing through the hot water injection pipe line 12. In addition, the pouring pipe 12 may be provided with a backflow preventing means (not shown).

The heat source device 30 includes a reheating pipeline 60 for circulating bath water BW between the reheating heat exchanger 34 and the bathtub. The reheating pipe line 60 includes an outgoing pipe 60-1 and a return pipe 60-2. The outgoing pipe 60-1 is a pipe for flowing the bath water BW from the reheating heat exchanger 34 to the bathtub. The return pipe 60-2 is a pipe for flowing the bath water BW to the reheating heat exchanger 34 side.

The pouring pipe line 12 is connected to the outgoing pipe 60-1. A check valve 62 and a temperature sensor 64 are installed in the going pipe 60-1. The check valve 62 is an example of the backflow preventing means of the present disclosure, and is installed between the connection portion P1 and the reheating heat exchanger 34 to limit the flow direction of the hot water HW. That is, the flow direction of the hot water HW coincides with the direction of returning the bathtub water BW to the bathtub side. As a result, the poured hot water HW is prevented from flowing to the reheating heat exchanger 34 side.

The forward pipe 60-1 and the return pipe 60-2 are connected by a bypass path 20 installed on the bathtub side of the connection portion P1, and a check valve 74 is installed in the bypass path 20. .. The check valve 74 is an example of the flow direction regulating means of the present disclosure, and prevents the bath water BW flowing through the return pipe 60-2 from flowing into the bypass path 20 in the reheating process, and is a reheating heat exchanger. It prevents bypassing 34.

The return pipe 60-2 is provided with a water level sensor 66, an on-off valve 68, a temperature sensor 70, a pump 72, and the like from the bathtub side toward the reheating heat exchanger 34. The water level sensor 66 is an example of a means for detecting the water level in the bathtub by, for example, the water pressure from the bathtub side. The on-off valve 68 is an example of means for switching the flow of bath water BW or hot water HW through the return pipe 60-2 side by opening and closing. That is, when the on-off valve 68 is opened in the reheating process, the bathtub water BW flows from the bathtub side toward the reheating heat exchanger 34 side in the return pipe 60-2. Further, when the on-off valve 68 is opened in the hot water pouring process, the hot water HW is flowed to the return pipe 60-2 through the bypass path 20.

In addition, the heat source device 30 includes a control unit 80. The control unit 80 may be connected to, for example, a remote control device or a display device (not shown), which performs control processing including combustion control, switching of hot water injection processing, opening / closing of the on-off valve 68, and the like. , Temperature setting and other control-related setting processing may be enabled.

<About the pouring flow path>

FIG. 3 shows an example of a pouring route using a reheating pipeline.

When a request for pouring hot water into the bathtub occurs, the heat source device 30 starts combustion of the burner 4 to heat the hot water supply, and opens the on-off valve 52 to open the hot water pouring pipe line 12. As shown in A of FIG. 3, the heat source device 30 is a one-sided transport in which hot water HW is poured from the hot water pouring pipe line 12 to the bathtub side only through the outgoing pipe 60-1 when the on-off valve 68 is in the closed state. At this time, the heat source device 30 can detect the water level in the bathtub by the water level sensor 66 while pouring hot water. Further, in the heat source device 30, as shown in B of FIG. 3, when the on-off valve 68 is in the open state, hot water HW is also flowed to the return pipe 60-2 side to pour hot water into the bathtub. By performing double transport in this way, the amount of hot water poured increases and the hot water filling time can be shortened.

For example, in the hot water pouring process, the control unit 80 may set in advance whether to set the single transfer or the double transfer. Further, the control unit 80 may set single transport or double transport based on conditions such as the elapsed time of hot water pouring process execution, the amount of hot water pouring, and whether or not a hot water supply request is generated at the same time.

The control unit 80 may perform combustion control according to the change in the amount of water supply due to switching between single transfer and double transfer for the hot water injection process.

<About the configuration of the control unit>

FIG. 4 shows an example of the control unit of the heat source device. The configuration shown in FIG. 4 is an example, and the present invention is not limited to such contents.

The control unit 80 is composed of a computer, and performs information processing related to combustion control of the burner 4, hot water supply heating, arithmetic processing related to reheating heating, hot water pouring control, and the like. The control unit 80 includes, for example, a processor 82, a memory unit 84, and an I / O (Input Output) 86.

The processor 82 calculates the program recorded in the memory unit 84 to control the operation of the heat source device 30 and perform information processing. The memory unit 84 stores, for example, a ROM (Read-Only Memory) that stores an operation control program including combustion control, pouring control, reheating control, and other operation controls of the heat source device 30, and a processor 82 for these programs. It is equipped with a RAM (Random Access Memory) that functions as a work area for the user to execute. In addition, the control unit 80 may be provided with, for example, a communication function with an external network (not shown), a short-range communication function for transmitting / receiving data to / from a mobile terminal device owned by the user, and the like.

The I / O 86 is an example of an interface for exchanging data with each functional unit installed in the heat source device 30 and detection means such as a sensor. The control unit 80 responds to a hot water supply request, a hot water pouring request, or a reheating request from each of the temperature sensors 40, 44, 50, 64, 70 via the I / O 86 to the clean water temperature, hot water supply temperature, hot water pouring temperature, and bathtub. In addition to acquiring the water temperature and the like, it controls the opening and closing of the on-off valves 52 and 68, takes in the detection information of the water amount sensor 42, the hot water injection amount sensor 54 and the water level sensor 66, gives an operation instruction of the pump 72, and gives a combustion instruction to the burner 4.

<About hot water filling operation control>

FIGS. 5 to 7 show a processing example of fully automatic operation. The processing contents, processing procedures, and the like shown in FIGS. 5 to 7 are examples, and the present invention is not limited to such contents.

This fully automatic operation process is an example of the hot water pouring method or the hot water pouring program of the heat source device of the present disclosure, and shows the hot water pouring function of the heat source device 30 to the bathtub side.

The heat source device 30 confirms the presence or absence of remaining hot water in the bathtub when an automatic hot water filling request is issued to the bathtub by, for example, remote control operation (S11). The control unit 80 may read, for example, the detected value of the water level sensor 66 and determine whether or not there is hot water in the bathtub. When there is no remaining hot water in the bathtub (YES in S12), the control unit 80 starts the hot water pouring process and gives an instruction to pour hot water so that the hot water is stored up to a predetermined water level in the bathtub (S13).

In this pouring process, for example, as shown in FIG. 6, pouring of a predetermined amount X1 may be started at a set temperature (S21), and pouring may be performed until the predetermined amount X1 flows (YES in S22). The predetermined amount X1 may be set to a flow rate that reaches the water level of the circulation port of the bathtub to which the reheating pipe line 60 is connected by pouring hot water into the bathtub in a state where there is no remaining hot water, for example. At this time, the heat source device 30 may control the on-off valve 68 in the open state to perform double transfer.

When the pouring up to the predetermined water level (S13) is completed, the control unit 80 starts the water level detection and the pouring amount correction process (S14). In this process, the amount of hot water in the current bathtub is grasped, and the amount of hot water required to reach the set water level is calculated.

Therefore, as shown in FIG. 7, for example, the control unit 80 closes the on-off valve 68 (S31), sets the pouring to one-sided transport, and sets the pouring amount to a predetermined amount X2 (S32). For this predetermined amount X2, for example, when pouring is started from a state where the bathtub is empty, the remaining pouring amount required for filling the water to the set water level may be set.

The heat source device 30 grasps the water level in the bathtub from the detection result of the water level sensor 66 (S33), and determines whether or not it matches the assumed water level (S34). For this assumed water level, for example, a predetermined water level set in the hot water injection treatment of S13 may be used. When the detected water level matches the assumed water level (YES in S34), the control unit 80 maintains the remaining pouring amount at X2 (S35). If the detected water level does not match the set water level (NO in S34), the corrected pouring amount X3 is set based on the difference in the water level (S36).

In the water level detection and the correction process of the pouring amount, the heat source device 30 may continue pouring hot water by one-sided transportation only on the outgoing pipe 60-1 side, and detect the water level in the bathtub by the returning pipe 60-2. ..

When the setting of the pouring amount is completed, the heat source device 30 pours the remaining pouring amount by double transport (S15). When the set pouring amount is reached, the pouring pipe line 12 is closed, and reheating heating is performed until the hot water in the bathtub reaches the set temperature (S16).

Further, when the heat source device 30 determines that hot water remains in the bathtub in the determination of the presence or absence of the remaining hot water at the start of pouring (NO in S12), the heat source device 30 calculates the remaining hot water amount based on the current water level. Double transport may be performed (S15).

<About hot water supply processing>

Next, an example of processing when a hot water supply request occurs is shown.

When a hot water supply load such as a shower occurs during the execution of the hot water pouring process, the heat source device 30 may simultaneously perform the hot water pouring process to the bathtub and the hot water supply to the hot water supply load. In this case, the hot water supply temperature may be set to the hot water pouring temperature. The control unit 80 determines whether or not the hot water pouring flow rate and the requested hot water supply flow rate exceed the hot water supply capacity of the heat source device 30. When the hot water supply capacity is exceeded, the control unit 80 may limit the total water flow rate by using a water control valve (not shown) provided in the water supply line 38, or may limit the hot water injection flow rate.

To limit the flow rate of pouring water, for example, the on-off valve 68 may be closed to switch from double transfer to single transfer.

Further, the heat source device 30 may perform combustion control according to the required hot water supply temperature, for example, when pouring hot water and supplying hot water at the same time. By performing combustion control in this way, when the hot water supply request is completed in a short time, hot water can be supplied at the temperature required by the user, and the convenience of the heat source device 30 is enhanced. Further, since the amount of hot water poured is reduced by one-sided transportation, even if hot water having a temperature higher than the set temperature of the bathtub is poured, the influence on the temperature in the bathtub can be suppressed.

When hot water is poured at the required hot water supply temperature, the temperature inside the bathtub may be adjusted in the reheating process.

<Effect of the second embodiment>

(1) By performing the hot water pouring process using both the forward pipe 60-1 and the return pipe 60-2, it is possible to quickly fill the bathtub with hot water, and the convenience of the heat source device can be achieved.

(2) Cost reduction and processing of heat source equipment by realizing a means to prevent backflow to the reheating pipeline with a simple configuration and eliminating the need for control such as opening and closing and switching in the pouring process and the reheating process. Can be simplified.

(3) By connecting the pouring pipe line 12 to the outgoing pipe 60-1 side and closing the on-off valve 68 on the return pipe 60-2 side, the water level sensor 66 installed on the return pipe 60-2 is used. Since the hot water pouring process can be continued by one-sided transportation while detecting the water level in the bathtub, the hot water filling process of the bathtub can be speeded up.

(4) Even when the hot water injection treatment and the hot water supply treatment are performed at the same time, hot water close to the required temperature can be supplied, and the convenience of the heat source device 30 is enhanced.

(5) Even if a hot water supply request occurs during the hot water pouring process, the hot water filling process is not interrupted, so that the situation where the hot water filling is not completed can be avoided.

[Example 1]

FIG. 8 shows an example of a pouring flow path. The configuration shown in FIG. 8 is an example, and the present invention is not limited to such a configuration.

As shown in FIG. 8, for example, the pouring pipe 12 is arranged in a vertical direction or a direction close to it, and the upper end of the pouring pipe 12 is connected to a hot water supply pipe (not shown). .. Further, the lower end side of the pouring pipeline 12 is connected to, for example, a pipeline 92 installed in the horizontal direction. The hot water injection line 12 is provided with an on-off valve 52 that blocks the inflow of hot water from the hot water supply line, a hot water injection amount sensor 54, and a check valve 90 that prevents the backflow to the hot water supply line.

The pipeline 92 is a pipeline in which the hot water HW poured from the pouring pipeline 12 is poured into the reheating pipeline side. For example, the outgoing pipe 94 from the reheating heat exchanger 34 and the return pipe 98 to the reheating heat exchanger 34 are connected to the pipeline 92 in parallel with the pouring pipeline 12. Further, in the pipeline 92, the outgoing pipe 96 is connected between the outgoing pipe 94 and the return pipe 98 in the downward direction in the vertical direction. This pipeline 92 is an example of a part of the above-mentioned pouring pipeline 12 and a bypass passage 20, and a check valve 74 is installed between the outgoing pipe 96 and the return pipe 98.

The going pipe 94 is, for example, a part of the going pipe 60-1 described above, and is a pipe line between the connecting portion P1 and the reheating heat exchanger 34. The outbound pipe 94 is provided with a check valve 62 which is a backflow prevention means. The outgoing pipe 96 is a part of the outgoing pipe 60-1, and is a pipe line from the connecting portion P1 to the bathtub side. The outgoing pipe 96 causes the hot water poured into the pipe line 92 to flow to the bathtub side.

The upper side of the return pipe 98 is connected to the above-mentioned reheating heat exchanger 34, and the return pipe 98 is a pipe for flowing bath water to the reheating heat exchanger 34 side. The bathtub water sucked by the lift of the pump 72 flows into the return pipe 98.

In addition, the return pipe 100 and the return pipe 104 are connected to the pipeline 92 via, for example, a pump 72. The return pipes 100 and 104 are examples of pipes going from the bypass road 20 to the bathtub side.

The pipeline forming the pouring flow path in this way is arranged so that, for example, in the pouring treatment, the conduit through which the hot water flows is horizontal or at an angle close to it, or downward in the vertical direction. Further, the supplied hot water HW passes through the pipe line 92 and flows into the bathtub side through the going pipe 96 and the returning pipes 100 and 104. That is, in this heat source device, the check valve 62 is provided in the outgoing pipe 94 connected to the reheating heat exchanger 34 side, and the outgoing pipe 94 and the return pipe 98 are vertically connected to the pipeline 92 through which the hot water HW flows. By connecting in the upward direction, it is difficult for the poured hot water to flow into the outgoing pipe 94 and the return pipe 98.

In addition, the return pipe 98 may be provided with an orifice at a portion 102 close to the connection portion with the pipe line 92 to make it difficult for the hot water HW to flow in.

According to such a configuration, the poured hot water can be poured into the bathtub side without being stagnant in the pouring flow path. In addition, the simple configuration of the check valves 62 and 74 and the direction of the piping can prevent the hot water to be poured from flowing to the reheating heat exchanger 34 side, reducing the cost of the heat source device and simplifying the processing. You can plan.

[Example 2]

FIG. 9 shows another embodiment of the heat source device. In this heat source device 30-2, a bypass path 20 is installed on the outgoing pipe 60-1 between the connecting portion P1 of the pouring pipe line 12 and the reheating heat exchanger 34. The hot water HW poured through the hot water injection pipe 12 is branched at the connection portion P1 on the outgoing pipe 60-1, one flows to the bathtub side, and the other has a predetermined length toward the reheating heat exchanger 34. It passes through the hot water pouring area 110 and is flushed to the bypass path 20 side.

A check valve 62 is installed in the going pipe 60-1, for example, between the connection portion P1 and the reheating heat exchanger 34, and on the reheating heat exchanger 34 side of the connection position of the bypass path 20. To.

As a result, as shown in FIG. 10A, the heat source device 30-2 is formed with a one-sided transport flow path using only the outgoing pipe 60-1 by closing the on-off valve 68. Further, in the heat source device 30-2, as shown in B of FIG. 10, by opening the on-off valve 68, the flow path using the outgoing pipe 60-1 and the pouring area of the outgoing pipe 60-1 are provided. A flow path is formed in which the bypass path 20 is passed from 110 and flows into the bathtub through the return pipe 60-2.

Further, as shown in FIG. 11, for example, the heat source device 30-2 is provided from the hot water pouring pipe line 12 and the reheating heat exchanger 34 in the vertical direction upward with respect to the pipe line 92 arranged horizontally or close to it. The outgoing pipe 94 and the return pipe 98 to the reheating heat exchanger 34 are arranged in parallel. Further, in the pipe line 92, a going pipe 96 to the bathtub side is arranged vertically downward between the pouring pipe line 12 and the going pipe 94. The direction, function, and effect of each pipeline are the same as those in FIG. 8, and the description thereof will be omitted.

[Other Embodiments]

In the above embodiment, as the heat source device, a so-called one-can two-water heat source device in which the reheating heat exchanger and the heat exchanger for heating the hot water to be supplied are heated by a common heat source is shown, but the present invention is limited to this. Absent. As long as it is a heat source device having a hot water pouring function for flowing heated hot water to the bathtub side, it may be a so-called one-can three-water heat source device having a heating function or the like.

As shown in FIG. 12, for example, the heat source device 30-2 includes a reheating heat exchanger 34 and a heat medium heat exchanger 120 for heating the heat medium in a combustion chamber 32 provided with a burner 4 which is a heat source. A heat medium circulation path 122 is connected to the heat medium heat exchanger 120, and a heat medium such as water or alcohol circulates inside. The heat medium circulation path 122 includes, for example, a hot water supply heat exchanger 124 in which the clean water W flows from the water supply pipe line 38, and the clean water W is heated by the heat of the heat medium. The hot water HW heated by the hot water supply heat exchanger 124 passes from the hot water supply pipe line 10 through the hot water supply pipe line 12, and is poured into the bathtub side through the reheating pipe line 60. The pouring flow path using the pouring pipe 12 and the reheating pipe 60 has the configuration shown in the above embodiment.

In addition, a tank 126 for storing the heat medium, a circulation pump 128, a mixing valve 130, a distribution valve 132, and 134 are installed in the heat medium circulation path 122, and a high temperature load for flowing the heat medium to a high temperature terminal which is a heating load. The flow path 136, the low temperature load flow path 138 flowing through the low temperature load, and the return line 140 through which the heat medium flows from the heating load side to the tank 126 may be provided.

As described above, the most preferable embodiment of the heat source device has been described. The present invention is not limited to the above description. Various modifications and modifications can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the form for carrying out the invention. Needless to say, such modifications and modifications are included in the scope of the present invention.

In the heat source device of the present invention and the method of pouring water thereof, backflow prevention having a simple configuration is performed between the connection portion where the hot water pouring pipe is connected to the pipe for flowing bathtub water to the bathtub side and the reheating heat exchanger. By providing the means, it is possible to prevent the hot water to be poured from being reheated, and it is possible to stabilize the pouring temperature and simplify the heat source device, which is useful.

2, 30, 30-2 Heat source device 4 Burner 6, 34 Reheating heat exchanger 8, 36 Heat exchanger 10 Hot water supply pipe 12 Hot water injection pipe 14,60 Reheating pipe 14-1, 14-2, 92 Pipe line 18 Backflow prevention means 20, 46 Bypass path 22 Flow direction control means 32 Combustion chamber 38 Water supply line 40, 44, 50, 64, 70 Temperature sensor 42 Water amount sensor 48 Switching valve 52, 68 On-off valve 54 Pouring amount sensor 60 -1,94 Outgoing pipe 60-2, 96, 98, 100, 104 Return pipe 62, 74, 90 Check valve 66 Water level sensor 72 Pump 80 Control unit 82 Processor 84 Memory unit 86 I / O
102 Orchid 110 Hot water pouring area 120 Heat medium heat exchanger 122 Heat medium circulation path 124 Hot water supply heat exchanger 126 Tank 128 Circulation pump 130 Mixing valve 132, 134 Distribution valve 136 High temperature load flow path 138 Low temperature load flow path 140 Return pipe

Claims (7)

A heat source device that heats a reheating heat exchanger that heats bathtub water and a heat exchanger that heats a heat medium or water supply with a common heat source.
A reheating pipeline having a first pipeline for returning the bathtub water to the bathtub side and a second pipeline for flowing the bathtub water to the reheating heat exchanger side.
A hot water supply pipeline through which hot water heated by the heat exchanger flows, and
A hot water pouring pipe for pouring hot water from the hot water supply pipe into the reheating pipe, and
A bypass path that connects to the second pipeline and bypasses the reheating heat exchanger to allow the hot water to flow.
A flow direction regulating means provided in the bypass path to regulate the flow direction of the hot water from the first pipeline to the second pipeline side.
When the bath water is heated, the flow direction regulating means means that the bath water bypasses the reheating heat exchanger from the second pipe and flows into the first pipe by the bypass line. When pouring the hot water from the pouring pipe into the reheating pipe, the hot water from the pouring pipe flows into the first pipe of the reheating pipe and the bypass is used. A heat source device characterized in that hot water is poured into a bathtub from both the first pipe line and the second pipe line by flowing the water through the second pipe line. Further, an opening / closing means installed in the second pipeline provided with a water level detecting means for detecting the bathtub water level and opening / closing the pipeline.
At the time of pouring, a control unit that closes the opening / closing means and controls the amount of pouring into the bathtub according to the bathtub water level detected by the water level detecting means.
The heat source device according to claim 1, further comprising. The second aspect of the present invention, wherein the control unit closes the opening / closing means and supplies hot water from the hot water supply pipe together with the hot water pouring into the bathtub in response to a hot water supply request during hot water pouring into the bathtub. Heat source device. Further, the control unit makes it possible to select either a hot water injection set temperature or a hot water supply set temperature in response to a hot water supply request during hot water pouring into the bathtub, and controls the combustion amount of the heat source according to the set temperature. The heat source device according to claim 2 or 3, characterized in that. Further, it is provided with a backflow blocking means which is installed in the first pipeline and prevents the hot water from the pouring pipeline from flowing back to the reheating heat exchanger side, and is provided from the pouring pipeline. The claim according to any one of claims 2 to 4, wherein when the hot water is poured into the reheating pipeline, the backflow blocking means blocks the inflow of the hot water to the reheating heat exchanger side. The heat source device described in. The heat source device according to claim 5, wherein a check valve or a two-way valve for blocking backflow is used as the backflow blocking means or the flow direction regulating means. It is a method of pouring a heat source device that heats a reheating heat exchanger that heats bathtub water and a heat exchanger that heats a heat medium or water supply with a common heat source.
At least the process of flowing hot water heated by the heat exchanger into the hot water supply pipeline,
From the hot water supply pipeline, with respect to the reheating pipeline having a first pipeline which is a pipeline for returning the bathtub water to the bathtub side and a second pipeline for flowing the bathtub water to the reheating heat exchanger side. The process of pouring hot water and
When the hot water is poured from the pouring pipe into the reheating pipe, the hot water from the pouring pipe is made to flow into the first pipe of the reheating pipe and the second pipe. A step of pouring hot water into the bathtub from both the first pipe line and the second pipe line by flowing the water through the second pipe line by connecting with and bypassing the reheating heat exchanger. ,
When the bathtub water is heated, the bathtub water passes through the bypass path and bypasses the reheating heat exchanger from the second pipeline by the flow direction regulating means provided in the bypass path, and the first And the process of preventing it from flowing into the pipeline
A method of pouring a heat source device, which comprises.

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