JP6651384B2 - Heat source device and pouring method thereof - Google Patents

Description

The present invention relates to, for example, a technique of pouring water into a bathtub using a reheating pipe line for a heat source device that performs heating of feed water and reheating of bathtub water using a common heat source.

  As the heat source device, there is a so-called one-can-two-water system in which hot water supply heating and reheating are performed by a common heat source, and a so-called one-can-three water system that supplies heat to a heating load in addition to these functions. is there. In this heat source device, in order to pour the hot water heated by the heat exchange into the bathtub side, a part of the reheating line is used as a pouring flow path. The reheating line has a reheating heat exchanger that uses the same heat source as the hot water supply, and the hot water flowing in the reheating line is reheated when passing through the reheating heat exchanger. You. Therefore, in the stage of filling with hot water in the bathtub, the hot water may be poured while being heated to a temperature higher than the set temperature of the hot water.

  Regarding pouring using such a reheating pipe, by providing an electromagnetic valve in the filling channel and the pipe on the inlet side of the reheating heat exchanger, by closing this electromagnetic valve when filling, There is a type in which hot water is not allowed to flow to the additional heat exchanger side (for example, Patent Document 1).

JP-A-10-073312

  If the poured hot water is prevented from flowing into the additional heat exchanger side by opening and closing the solenoid valve installed in the additional heating line, the cost and installation costs of the heat source equipment increase, This will increase the installation space of the pipeline. Further, the heat source device has to perform opening / closing control of the solenoid valve every time a pouring request is generated, and there is a problem that processing such as operation control is complicated.

  In addition, in the pouring process, for example, there is a process in which heating is performed at a temperature lower than a set temperature of a pouring request, assuming that reheating is performed in advance. However, in the heat source device, the combustion amount of the heat source is assumed in consideration of, for example, the flow rate of feed water, the temperature at the time of feed water, the heat exchange efficiency at the time of reheating of pouring water, and the processing content becomes complicated. However, there is a problem that it is difficult to adjust the temperature to the set temperature of the molten metal.

  Furthermore, in the combustion device, when the amount of combustion, the amount of pouring water, and the like are controlled assuming reheating, there is a problem in that it is not possible to sufficiently cope with a hot water supply request that occurs simultaneously with pouring. 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 hot water heated for pouring flows to the hot water supply side, hot water having a temperature significantly different from the hot water supply required temperature will be supplied. If the pouring process is interrupted to give priority to the hot water supply request, there is also a problem that the time required for filling the bathtub increases and the convenience of the heat source device decreases.

  In view of the above problems, an object of the present invention is to stabilize a pouring temperature and to simplify a pouring function of a 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 for heating a tub water and a heat exchanger for heating a heat medium or feed water with a common heat source A hot-water supply pipe through which hot and cold water heated by the heat exchanger flows, and a hot-water supply pipe connected to a first pipe of the additional heating pipe, which is a pipe for returning bath water to the bath tub side. A pouring pipe line into which the hot water flows, and a backflow preventing means provided between the connecting portion of the pipe line and the additional heat exchanger to prevent a reverse flow of the hot water, and the pouring pipe line. Are separately provided and connected to the first pipe of the reheating pipe and a second pipe for flowing bathtub water to the reheating heat exchanger, and bypass the reheating pipe. A bypass passage connected to the second passage, and a flow direction of the hot water from the first passage to the second passage provided in the bypass passage. And a flow direction regulating means for regulating the, when heating the bath water, flows by bypassing the add焚熱exchanger from said second conduit bath water by the bypass passage to the first conduit from being blocked by the flow direction regulating means, the time of pouring the hot water, the hot water inlet blocked by the reverse current blocking means to said add焚熱exchanger side to the add焚管path from the pouring conduit Pouring the hot and cold water into the bath from both the first pipe and the second pipe of the reheating pipe, and preventing the circulation of the hot water from the bath to the reheating heat exchanger. do it.

In the above heat source device, further, installed in the second conduit provided with a water level detecting means for detecting a bathtub water level, an opening and closing means for opening and closing the conduit, and at the time of pouring, closing the opening and closing means, A control unit for controlling the amount of hot water poured into the bathtub based on the bathtub water level detected by the water level detection means.

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

  In the above heat source device, further, the control unit can select any one of a pouring set temperature and a hot water set temperature in response to a hot water supply request during pouring into the bathtub, and the heat source is controlled by the set temperature. The amount of combustion may be controlled.

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

In order to achieve the above object, according to one aspect of a pouring method of a heat source device of the present invention, a reheating unit for heating bath water and a heat exchanger for heating a heat medium or feed water are provided with a common heat source. A pouring method of a heat source device for heating at a step of flowing at least the hot water heated by the heat exchanger to a hot water supply pipe, and a pipe for returning the bathtub water to the bathtub side of the additional heating pipe . a step of pouring the hot water supply pipe or found before Symbol hot water to pouring conduit connected to the first conduit, the watch is a hot water pipe provided separately, the first tube of the add焚管path a step of being connected to the road and bath water and a second conduit for flowing the add焚熱exchanger side, pouring the hot water the bypass path connected to bypass the add焚熱exchanger, the pouring Backflow prevention means provided between the connection point of the pipeline and the additional heat exchanger prevents backflow of the hot water, When pouring the hot water the to add焚管path from conduit, wherein the reverse current blocking means prevents the said hot water is flowing into the add焚熱exchanger side, the first of the hot water the add焚管path Pouring water into the bathtub from both the pipeline and the second pipeline to prevent circulation of the hot water from the bathtub side to the reheating heat exchanger side; and, when heating the bathtub water, A flow direction regulating means provided in the passage prevents bathtub water from passing through the bypass passage and flowing from the second conduit to the first conduit by bypassing the reheating heat exchanger. Step may be included.

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

  (1) Regarding the function of pouring water into the bathtub using the reheating pipe, the reheating of the hot water by the reheating heat exchanger can be prevented, and the bath can be filled with the set temperature.

  (2) By using a backflow prevention means having a simple configuration, it is possible to prevent the hot and cold water flowing through the additional heating line from flowing into the additional heating heat exchanger, thereby reducing the cost of the heat source device and controlling the processing. Simplification can be achieved.

  (3) When a hot water supply request occurs during the pouring operation, pouring and hot water supply can be performed simultaneously at a temperature close to the required temperature, and the convenience of the heat source device is enhanced.

Other objects, features, and advantages of the present invention will become more apparent by referring to the accompanying drawings and embodiments.

It is a figure showing the heat source device concerning a 1st embodiment. It is a figure showing the heat source device concerning a 2nd embodiment. It is a figure which shows the pouring flow path of a heat source device. It is a figure showing an example of a control part. It is a flowchart which shows an example of fully automatic operation. It is a sub-flowchart including an initial operation of a pouring process. It is a sub-flowchart including a water level monitoring and a flow rate correction process of the pouring process. It is a figure which shows the Example of a pouring channel. It is a figure showing an example of another heat source device. It is a figure which shows an example of a pouring channel. It is a figure which shows the Example of another pouring flow path. It is a figure showing an example of another heat source device.

  [First Embodiment]

  FIG. 1 shows an example of a heat source device 2 according to the first embodiment. For example, a hot water supplied from a water supply heating function, a bath tub reheating function, and a water supply function side is poured into a bath tub. Equipped with hot water function.

  This heat source device 2 includes, for example, a reheater 6 and a heat exchanger 8 near a burner 4, as shown in FIG. The supplementary heat exchanger 6 and the heat exchanger 8 heat the bath water BW and the tap water W flowing therein by heat exchange with the high-temperature combustion exhaust gas discharged from the burner 4.

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

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

  The heat exchanger 8 exchanges heat of the clean water W flowing through the water supply pipe with the combustion exhaust gas. A water supply pipe and a hot water supply pipe 10 are connected to the heat exchanger 8. The water supply line is connected to, for example, water supply. The hot water supply pipe 10 is connected to a hot water supply means of the heat source device 2, and is also connected to a hot water supply pipe 12 for branching and pouring a part of the hot water toward the bathtub. The heated hot water HW flows through the hot water supply pipe 10 toward the hot water supply pipe 12 according to a hot water supply load such as a hot water supply port or a shower, or a request for pouring a bathtub. The pouring line 12 is connected to the side of the line 14-1 for returning the bath water BW heated by the additional heat exchanger 6 to the bath tub side.

  The additional heat exchanger 6 and the heat exchanger 8 may be arranged in a common combustion chamber through which the combustion exhaust gas of the burner 4 flows. The additional heat exchanger 6 and the heat exchanger 8 may be provided with, for example, heat absorbing fins on the surface.

  A backflow prevention means 18 is provided in the conduit 14-1. The backflow prevention means 18 is an example of a means for preventing hot water flowing in the pipeline 14-1 from flowing back to the additional heat exchanger 6, and a check valve, a two-way valve, or the like is used. The backflow prevention means 18 is installed in the backflow prevention area 16 between the connection portion P1 where the pouring line 12 joins the line 14-1 and the reheating heat exchanger 6. The installation position of the backflow prevention means 18 is preferably a position in the backflow prevention area 16 that is close to the connection portion P1. This can reduce the influence of the heat from the additional heat exchanger 6 on the hot water HW poured into the pipe 14-1.

  Further, the pipe 14-1 is provided with a bypass 20 connected to a pipe 14-2 in which the bathtub water BW flows toward the reheating heat exchanger 6 side. The bypass 20 is a pipe that branches between the connection part P1 of the pipe 14-1 and the bathtub. The bypass passage 20 is an example of a unit for flowing the bathtub water BW and the hot water HW by bypassing the additional heat exchanger 6, and a part of the hot water HW flowing to the pipe 14-1 is supplied to the pipe 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 or bath water BW is provided. The flow direction regulating means 22 regulates the hot and cold water HW to flow from the pipeline 14-1 to the pipeline 14-2 through the bypass passage 20. The flow direction regulating means 22 prevents the bathtub water BW from flowing from the pipe 14-2 to the pipe 14-1 through the bypass 20.

  The bypass 20 may be formed, for example, with a pipe diameter equivalent to the pipe 14-1, 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 passage 20 is set smaller than that of the pipe line 14-1, the poured hot water can flow more toward the pipe line 14-1 than the bypass passage 20, and vice versa. Holds.

  Thereby, heat source device 2 serves as a flow path for pouring hot water HW into the bathtub, and a first flow path through which part or all of hot water HW flows to pipe 14-1 side after passing through connection portion P1. And a second flow path through which part or all of the hot and cold water HW flows through the bypass path 20 into the pipe 14-2. When hot water HW is made to flow using the second flow path, the pipeline 14-2 has a reverse flow to the flow direction in which the bathtub water BW flows at the time of additional firing.

  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.

  <Effects of First Embodiment>

  (1) The pouring line 12 is connected to the line 14-1, and the backflow preventing means 18 is provided between the connecting portion P <b> 1 and the additional heat exchanger 6. Reheating of hot water can be prevented.

  (2) By not allowing hot water poured into the additional heat exchanger 6 to pass, hot water can be applied to the bathtub at the set temperature.

  (3) In the pouring process, it is possible to prevent hot water from flowing to the additional heat exchanger 6 without performing a process such as opening and closing of an electromagnetic valve, thereby reducing the cost of the heat source device. Since there is no need 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. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals.

  The combustion device 30 includes a combustion chamber 32 having a burner 4. The combustion chamber 32 is provided with a post-heating heat exchanger 34 and a heat exchanger 36, which exchange heat with the combustion exhaust gas of the common burner 4. The additional heat exchanger 34 and the heat exchanger 36 may be integrally formed in the combustion chamber 32, for example.

  The heat exchanger 36 is an example of a unit that exchanges heat with the inflowing clean water W. The heat exchanger 36 is connected to a water supply pipe 38 for flowing the clean water W to the inflow side. The water supply pipe 38 is connected to, for example, a water supply, and flows the tap water W 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 unit that detects the temperature of the clean water W flowing into the water supply conduit 38. The water amount sensor is an example of a unit that monitors the start of water supply and the amount of flowing water.

  A hot water supply pipe 10 is connected to the outlet side of the heat exchanger 36. The hot water supply pipe 10 is provided with a temperature sensor 44, a water supply bypass path 46, a switching valve 48, a temperature sensor 50, and the pouring water pipe 12 is connected thereto. The temperature sensor 44 is an example of a unit that detects the temperature of the hot and cold water HW after the heat exchange. The water supply bypass channel 46 is an example of a pipeline that is connected to the water supply pipeline 38 and that allows the clean water W before heating to flow into the hot water pipeline 10 by bypassing the heat exchanger 36. The switching valve 48 is provided at a connection position between the hot water supply pipe 10 and the water supply bypass passage 46, and is an example of a unit that adjusts a mixing amount of the heated hot water HW and the clean water W. The temperature sensor 50 is an example of a unit that detects the temperature of the hot and cold water HW mixed with cold water, and is used, for example, to monitor whether the temperature is a required hot water supply temperature or a pouring temperature.

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

  The heat source device 30 includes a reheating line 60 that circulates bath water BW between the reheating heat exchanger 34 and the bath. The reheating 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 bathtub water BW from the reheating heat exchanger 34 to the bathtub. The return pipe 60-2 is a pipe for flowing the bathtub water BW to the additional heat exchanger 34 side.

  Pouring line 12 is connected to going pipe 60-1. A check valve 62 and a temperature sensor 64 are installed on the going pipe 60-1. The check valve 62 is an example of a backflow prevention unit according to the present disclosure, and is installed between the connection portion P1 and the additional heat exchanger 34, and restricts the flow direction of the hot and cold water HW. That is, the flow direction of the hot water HW matches the direction in which the bath water BW is returned to the bath tub side. This prevents the poured hot water HW from flowing to the additional heat exchanger 34 side.

  The going pipe 60-1 and the return pipe 60-2 are connected to each other by a bypass 20 provided on the bathtub side with respect to the connecting portion P1, and a check valve 74 is provided in the bypass 20. . The check valve 74 is an example of a flow direction regulating unit according to the present disclosure, and prevents the bath water BW flowing through the return pipe 60-2 from flowing to the bypass passage 20 in the reheating process, and the reheating heat exchanger. 34 is prevented from being bypassed.

  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 unit that detects a water level in the bathtub based on a water pressure from the bathtub side, for example. The on-off valve 68 is an example of a unit that switches the flow of the bathtub 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 in the reheating process, the bathtub water BW flows from the bathtub side to the reheating heat exchanger 34 side. When the on-off valve 68 is opened in the hot water pouring process, the hot water HW flows through the return pipe 60-2 through the bypass 20.

  In addition, the heat source device 30 includes a control unit 80. The control unit 80 that performs control processing including, for example, switching between combustion control and pouring processing, opening and closing the on-off valve 68, and the like, may be connected to, for example, a remote control device or a display device (not shown). It is only necessary to enable a setting process for temperature setting and other controls.

  <About the pouring channel>

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

  When a request for pouring water into the bathtub occurs, the heat source device 30 starts burning the burner 4 to perform hot water supply heating, and opens the on-off valve 52 to open the pouring line 12. As shown in FIG. 3A, when the on-off valve 68 is in the closed state, the heat source device 30 performs a one-sided conveyance in which the hot water HW flows from the pouring line 12 to the bathtub side only through the going pipe 60-1. At this time, in the heat source device 30, the water level in the bathtub can be detected by the water level sensor 66 while pouring the molten metal. Further, in the heat source device 30, as shown in FIG. 3B, when the on-off valve 68 is in the open state, the hot water HW is caused to flow also on the return pipe 60-2 side and the hot water is poured into the bathtub. By performing the double transfer in this manner, the pouring amount is increased and the filling time can be reduced.

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

  In addition, when the water supply amount is changed by switching between the single conveyance and the double conveyance in the pouring process, the control unit 80 may perform the combustion control according to the change.

  <About the configuration of the control unit>

  FIG. 4 illustrates an example of a 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 a content.

  The control unit 80 is configured by a computer, and performs information processing relating to combustion control of the burner 4, arithmetic processing relating to hot water supply heating, additional heating, 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 performs operation control, information processing, and the like of the heat source device 30 by calculating a program recorded in the memory unit 84. The memory unit 84 includes, for example, a ROM (Read-Only Memory) that stores an operation control program including, for example, combustion control, pouring control, additional heating control, and other operation control of the heat source device 30, and a processor 82 that stores these programs. And a RAM (Random Access Memory) functioning as a work area for executing the program. In addition, the control unit 80 may include, for example, a communication function with an external network (not shown), a short-range communication function of transmitting and receiving data to and from a portable terminal device owned by the user, and the like.

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

  <Reservoir operation control>

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

  This fully automatic operation process is an example of a method of pouring a heat source device or a program for pouring the heat source device according to the present disclosure, and illustrates a function of pouring a heat source device 30 into a bathtub.

  When an automatic hot water filling request is issued to the bathtub by, for example, a remote control operation, the heat source device 30 checks whether there is remaining hot water in the bathtub (S11). The control unit 80 may read a detection value of the water level sensor 66, for example, 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), control unit 80 starts the pouring process and gives a pouring instruction so that hot water is stored 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 at a set temperature is started (S21), and pouring may be performed until the predetermined amount X1 flows (YES in S22). The predetermined amount X1 may be set, for example, by pouring water into a bath tub having no remaining hot water to reach a water level at a circulation port of the bath tub to which the additional heating pipe 60 is connected. At this time, the heat source device 30 may perform the double conveyance by controlling the on-off valve 68 to the open state.

  When pouring to the predetermined water level (S13) is completed, the control unit 80 starts water level detection and correction processing of the pouring amount (S14). In this process, the current amount of hot water in the bathtub is grasped, and the required amount of hot water until the set water level is reached 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 conveyance, and sets the pouring amount to the predetermined amount X2 (S32). As the predetermined amount X2, for example, when pouring is started from an empty bath tub, the remaining pouring amount required to fill the bath to the set water level may be set.

  The heat source device 30 grasps the water level in the bathtub based on the detection result of the water level sensor 66 (S33), and determines whether the water level matches the expected water level (S34). As the assumed water level, for example, a predetermined water level set in the pouring process in S13 may be used. When the detected water level matches the assumed water level (YES in S34), 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), a pouring amount X3 corrected based on the difference in the water level is set (S36).

  In addition, in this water level detection and pouring amount correction processing, if the heat source device 30 continues pouring by single conveyance only on the side of the outgoing pipe 60-1 and detects the water level in the bathtub by the return pipe 60-2. Good.

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

  In addition, when determining that there is remaining hot water in the bath at the start of pouring, heat source device 30 determines the remaining pouring amount calculated based on the current water level, when it is determined that hot water remains in the bathtub (NO in S12). What is necessary is just to carry out double conveyance (S15).

  <About hot water supply processing>

  Next, a processing example when a hot water supply request is generated will be described.

  When a hot water supply load such as a shower occurs during the execution of the hot water supply process, the heat source device 30 may simultaneously perform the hot water supply 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 pouring temperature. Control unit 80 determines whether or not the pouring flow rate and the requested hot water supply flow rate exceed the hot water supply capacity of heat source device 30. When the hot water supply capacity is exceeded, the control unit 80 may use a water control valve (not shown) provided in the water supply pipe line 38 to limit the entire flow rate of water, or may limit the flow rate of pouring water.

  The pouring flow rate may be limited, for example, by closing the on-off valve 68 and switching from double conveyance to single conveyance.

  In addition, for example, when pouring and hot water supply are performed simultaneously, the heat source device 30 may perform combustion control in accordance with the required hot water supply temperature. By performing the combustion control in this manner, when the hot water supply request is completed in a short time, hot water can be supplied at a temperature required by the user, and the convenience of the heat source device 30 is improved. Also, since the amount of pouring is reduced by one-sided conveyance, 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 the hot water is supplied at the required hot water supply temperature, the temperature in the bathtub may be adjusted in the additional heating process.

  <Effect of Second Embodiment>

  (1) By performing the pouring process using both the outgoing pipeline 60-1 and the return pipeline 60-2, the bathtub can be quickly filled with water, and the convenience of the heat source device can be improved.

  (2) Means to prevent backflow to the supplementary heating pipeline with a simple configuration, and by eliminating the need for control such as opening and closing and switching between the pouring process and the supplementary heating process, cost reduction and processing of the heat source device Can be simplified.

  (3) By connecting the pouring line 12 to the outgoing pipe 60-1 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 pouring process can be continued by one-sided conveyance while detecting the water level in the bathtub, the bath filling process of the bathtub can be speeded up.

  (4) Even when the pouring process and the hot water supply process are performed simultaneously, hot water close to the required temperature can be supplied, and the convenience of the heat source device 30 is improved.

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

  [Example 1]

  FIG. 8 shows an embodiment of the pouring channel. The configuration illustrated in FIG. 8 is an example, and the present invention is not limited to such a configuration.

  For example, as shown in FIG. 8, the pouring line 12 is arranged in a state of being set up in a vertical direction or a direction close thereto, and the upper end of the pouring line 12 is connected to a hot water supply line (not shown). . Further, the lower end side of the pouring line 12 is connected to a line 92 installed, for example, in a horizontal direction. The pouring line 12 is provided with an on-off valve 52 for shutting off the flow of hot water from the hot water supply line, a pouring amount sensor 54, and a check valve 90 for preventing backflow to the hot water line.

  The conduit 92 is a conduit for flowing the hot and cold water HW poured from the pouring conduit 12 into the additional firing conduit side. The pipe 92 is connected to, for example, an outgoing pipe 94 from the additional heat exchanger 34 and a return pipe 98 to the additional heating heat exchanger 34 in parallel with the pouring pipe 12. In addition, the pipe 92 is connected between the going pipe 94 and the return pipe 98 so as to go down in the vertical direction. The pipe 92 is an example of a part of the pouring pipe 12 and the bypass 20 described above. A check valve 74 is provided between the going pipe 96 and the returning pipe 98.

  The going pipe 94 is, for example, a part of the above-mentioned going pipe 60-1, and is a pipe line from the connection portion P <b> 1 to the reheating heat exchanger 34. The outgoing pipe 94 is provided with a check valve 62 which is a check means. The outgoing pipe 96 is a part of the outgoing pipe 60-1, and is a pipe from the connection portion P1 to the bathtub side. The going pipe 96 allows the hot and cold water flowing into the pipe 92 to flow toward the bathtub.

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

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

  The pipe line forming the pouring channel in this way is arranged, for example, such that the pipe line in which the hot water flows in the pouring process is horizontal or at an angle close thereto or vertically downward. Also, the supplied hot water HW passes through the pipe 92 and flows into the bathtub side through the going pipe 96 and the return 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 additional heating heat exchanger 34 side, and the outgoing pipe 94 and the return pipe 98 are connected to the pipe 92 through which the hot and cold water HW flows. By connecting vertically upward, the poured hot water is less likely to flow into the going pipe 94 and the return pipe 98.

  In addition, the return pipe 98 may be provided with an orifice, for example, at a portion 102 close to a connection portion with the pipe line 92, so that the hot and cold water HW can be made difficult to flow.

  According to such a configuration, the poured hot water can be poured into the bathtub without being blocked in the pouring channel. In addition, the simple configuration based on the check valves 62 and 74 and the direction of the pipes can prevent the hot and cold water from flowing to the additional heat exchanger 34 side, thereby reducing the cost of the heat source device and simplifying the processing. I can do it.

  [Example 2]

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

  A check valve 62 is installed in the going pipe 60-1, for example, between the connection portion P <b> 1 and the additional heat exchanger 34 and closer to the additional heat exchanger 34 than the connection position of the bypass 20. You.

  As a result, in the heat source device 30-2, as shown in FIG. 10A, by closing the on-off valve 68, a single-conveying flow path using only the going pipe 60-1 is formed. In addition, as shown in FIG. 10B, the on-off valve 68 is opened in the heat source device 30-2 to provide a flow path using the going pipe 60-1 and a pouring area of the going pipe 60-1. A flow path from 110 to the bypass path 20 and flowing to the bathtub through the return pipe 60-2 is formed.

  In addition, as shown in FIG. 11, for example, the heat source device 30-2 extends vertically from the pouring line 12 to the pipe 92 and the refilling heat exchanger 34 with respect to the pipe 92 arranged in a state close to the horizontal. The outgoing pipe 94 and the return pipe 98 to the additional heat exchanger 34 are arranged in parallel. Further, in the pipe 92, a going pipe 96 to the bathtub side is disposed vertically downward between the pouring pipe 12 and the going pipe 94. The directions, functions, and effects of each conduit are the same as those in FIG. 8, and a description thereof will be omitted.

  [Other embodiments]

  In the above-described embodiment, the so-called one-tank two-water heat source device in which the additional heat exchanger and the heat exchanger that heats hot and cold water are heated by a common heat source is shown as the heat source device, but is not limited thereto. Absent. As long as it is a heat source device having a pouring function of flowing heated hot water to the bathtub side, a so-called one-can-three-water heat source device having a heating function or the like may be used.

  As shown in FIG. 12, for example, the heat source device 30-2 includes a supplementary heat exchanger 34 and a heat medium heat exchanger 120 for heating a heat medium in a combustion chamber 32 having a burner 4 as 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 is circulated therein. The heat medium circulation path 122 includes, for example, a hot water supply heat exchanger 124 through which the clean water W flows from the water supply pipe 38, and the clean water W is heated by the heat of the heat medium. Hot water HW heated by hot water supply heat exchanger 124 passes from hot water supply line 10 through pouring line 12, and is poured into the bathtub through reheating line 60. The pouring flow channel using the pouring line 12 and the reheating line 60 has the configuration described in the above embodiment.

  In addition, the heating medium circulation path 122 is provided with a tank 126 for storing the heating medium, a circulation pump 128, a mixing valve 130, distribution valves 132 and 134, and a high-temperature load for flowing the heating medium to a high-temperature terminal serving as a heating load. A flow path 136, a low-temperature load flow path 138 for flowing a low-temperature load, and a return pipe 140 for flowing a heat medium from the heating load side to the tank 126 may be provided.

As described above, the most preferred embodiment of the heat source device and the like have been described. The present invention is not limited to the above description. Various modifications and changes can be made by those skilled in the art based on the gist of the invention described in the claims or disclosed in the detailed description. It goes without saying that such modifications and changes are included in the scope of the present invention.

In the heat source device and the pouring method according to the present invention, the backflow prevention with a simple configuration is provided between the connecting portion where the pouring line is connected to the line through which the bathtub water flows to the bathtub side and the reheating heat exchanger. By providing the means, it is possible to prevent the pouring water from being reheated, to stabilize the pouring temperature and to simplify the heat source device, which is useful.

2,30 Heat source device 4 Burner 6,34 Reheating heat exchanger 8,36 Heat exchanger 10 Hot water supply line 12 Pouring line 14,60 Reheating line 14-1,14-2,92 Pipe 18 Backflow Inhibiting means 20, 46 Bypass path 22 Flow direction regulating means 32 Combustion chamber 38 Water supply line 40, 44, 50, 64, 70 Temperature sensor 42 Water quantity sensor 48 Switching valve 52, 68 Opening / closing valve 54 Pouring quantity sensor 60-1, 94 Outgoing pipe 60-2, 96, 98, 100, 104 Return pipe 62, 74, 90 Check valve 66 Water level sensor 80 Control unit 102 Orifice 110 Pouring area 120 Heat medium heat exchanger 122 Heat medium circulation path 124 Hot water supply heat exchange vessel

Claims (6)

A re-heating heat exchanger for heating bath water, and a heat source device for heating a heat exchanger for heating a heat medium or feed water with a common heat source,
A hot water supply pipe for flowing hot and cold water heated by the heat exchanger,
A pouring pipeline that is connected to a first pipeline that is a pipeline that returns bathtub water to the bathtub side of the additional heating pipeline and that pours the hot water from the hot water pipeline;
Backflow prevention means installed between the connection part of the pipeline and the additional heating heat exchanger to prevent the backflow of the hot water,
The refilling pipe is provided separately from the pouring pipe, and is connected to the first pipe of the reheating pipe and a second pipe for flowing bathtub water to the reheating heat exchanger. A bypass path connected by bypassing the heat exchanger;
A flow direction regulating means provided in the bypass passage, for regulating a flow direction of the hot water from the first conduit to the second conduit side;
Wherein when the bathtub water is heated, the flow direction regulating means prevents the bathtub water from flowing from the second conduit to the first conduit by bypassing the reheater from the second conduit. was blocked by the Note the more hot water pipe when pouring the hot water to add焚管path, the said hot water flows into the add焚熱exchanger side blocked by the reverse current blocking means, said hot water said add焚管 A heat source device for pouring hot water into the bath from both the first pipe and the second pipe of the path, and preventing circulation of the hot water from the bath to the reheating heat exchanger. . Further, an opening / closing unit that is installed in the second pipeline including a water level detection unit that detects a bathtub water level, and that opens and closes the pipeline,
At the time of the pouring, a control unit that closes the opening / closing means and controls a pouring amount to the bathtub by the bathtub water level detected by the water level detecting means,
The heat source device according to claim 1, further comprising: Further, the control unit, with respect to hot water demand during the pouring into the bathtub, closes said opening and closing means, characterized in that hot water from the hot water supply conduit with the pouring of the tub, according to claim 2 Heat source device. Further, the control unit can select any one of a pouring set temperature and a hot water set temperature in response to a hot water supply request during pouring into the bathtub, and controls the combustion amount of the heat source according to the set temperature. wherein the heat source apparatus according to claim 2 or 3. The heat source device according to any one of claims 1 to 4 , wherein a check valve or a two-way valve for preventing backflow is used as the backflow prevention unit or the flow direction regulating unit. A supplementary heat exchanger for heating bath water, and a heat exchanger for heating a heat medium or feed water, and a pouring method of a heat source device for heating with a common heat source,
Flowing at least the hot water heated by the heat exchanger through a hot water supply pipe,
A step of pouring a first conduit connected to the note the hot water supply pipe or found before Symbol hot water in the hot water conduit is a conduit for returning the bath water in the bathtub side of add焚管path,
The refilling pipe is provided separately from the pouring pipe, and is connected to the first pipe of the reheating pipe and a second pipe for flowing bathtub water to the reheating heat exchanger. A step of pouring the hot water into a bypass connected to bypass the heat exchanger;
Backflow preventing means installed between the connection point of the pouring line and the reheating heat exchanger prevents backflow of the hot water, and the hot water is supplied from the pouring line to the reheating line. At the time of pouring, the backflow preventing means prevents the hot water from flowing into the additional heating heat exchanger side, and the hot water is supplied to both the first and second pipelines of the additional heating pipeline. And pouring the hot water into the bathtub, and preventing the circulation of the hot water from the bathtub side to the additional heating heat exchanger side ,
When the bathtub water is heated, by the flow direction regulating means provided in the bypass passage, the bathtub water passes through the bypass passage and bypasses the reheating heat exchanger from the second conduit to the first heat exchanger. Blocking flow into the pipeline of the
A method for pouring a heat source device, comprising: