JP2015045456A - Bath device with water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bath device with a water heater capable of suppressing a pipeline being damaged by freezing with a simple configuration.SOLUTION: In a bath device with a water heater, a water heater 2 which is arranged at a place lower than a bathtub is connected to the bathtub via a pipeline 16, and in the middle of the pipeline, a horizontal extension part 34 which is extended in a substantially horizontal direction inside the water heater and a vertical extension part 32 which is provided continuously from the horizontal extension part, being bent downward from the horizontal extension part at a substantially right angle and which is extended so as to be exposed to the outside from the inside of the water heater are formed. On an extension upper end side of the vertical extension part, protrusion space 36 is provided which communicates with the inside of the vertical extension part and which protrudes further upward than the horizontal extension part.

Description

  The present invention connects a hot water heater disposed at a lower position than the bathtub through a pipe to the bathtub, and a horizontal extending portion extending substantially horizontally in the hot water heater in the middle of the pipe; The horizontal extension portion is connected to the horizontal extension portion and bent downward at a substantially right angle so as to be exposed from the inside of the water heater to the outside (below the bottom surface of the water heater). The present invention relates to a bath apparatus with a water heater in which a vertically extending portion is formed.

  For example, Patent Literature 1 discloses a bathroom provided on two or more floors.

JP-A-10-131347

  By the way, for example, as a bath device with a water heater connected to a bathtub provided on the second floor with a water heater arranged in a lower place (first floor) than the bathtub via a pipe, the inside of the water heater is approximately in the middle of the pipe. A horizontal extending portion extending in the horizontal direction and a vertical extending portion extending from the horizontal extending portion to the lower side so as to be exposed to the outside from the inside of the water heater were formed. There is something. In this bath apparatus with a water heater, hot water may be accumulated in the pipe by performing a water flow test or the like after installing the water heater in a cold district, for example. Therefore, in order to prevent freezing of hot water accumulated in the pipe, the hot water is discharged from the pipe by opening a water drainage path provided in the vertically extending portion.

  However, the pipe located between the bathtub and the vertical extension part is suspended in a U shape, and even if the hot water in the pipe is discharged from the drainage channel, In some cases, hot water remained in the U-shaped pipe connected to this. In addition to this, for example, in a water flow test, hot water may remain in a bath heat exchanger, for example. In such a case, after the water drainage channel is closed, when the so-called drooping of hot water dripping from the bath heat exchanger to the outgoing pipe connected to the bath heat exchanger increases, the horizontal extension part connected to the outgoing pipe is increased. The flowing hot water collects in the vertical extension. Furthermore, if the drooping continues, hot water may accumulate in the horizontal extension portion in addition to the vertical extension portion. In such a case, if the outside air temperature rises or falls below 0 ° C in a short cycle after the outside air temperature drops and the vertical extension portion and the horizontal extension portion freeze, When the temperature exceeds the above, ice melting in the vertical extending portion that is easily affected by the outside air temperature starts, and the ice melting portion in the vertical extending portion has a negative pressure than the frozen portion in the vertical extending portion. Then, the hot water remaining in the U-shaped pipe is sucked up by the de-icing part in the vertical extension part. When the temperature falls below 0 ° C., the vicinity of the lower end portion in the vertical extension portion is first frozen, and the defrosting portion excluding the vicinity of the lower end portion is divided into a frozen portion in the horizontal extension portion and a frozen portion in the vertical extension portion. It becomes a state sandwiched between. Thereafter, the de-icing part in the vertical extension part freezes and volume expansion occurs. In this case, since the volume expansion escape area is blocked by the frozen portion in the horizontal extension portion and the frozen portion in the vertical extension portion, pressure due to the volume expansion is directly applied to the vertical extension portion. It will be. When the outside air temperature rises or falls below 0 ° C repeatedly in a short cycle, the pipe is formed in the vicinity of the vertical extension due to repeated application of pressure due to the volume expansion to the vertical extension. There was a risk of damage.

  This invention is proposed in view of such a situation, Comprising: It aims at providing the bath apparatus with a hot water heater which can suppress that a piping is damaged by freezing with a simple structure.

  In order to achieve the above object, the invention described in claim 1 is such that a hot water heater arranged at a lower position than the bathtub is connected to the bathtub via the pipe, and is approximately in the middle of the pipe inside the hot water heater. A horizontal extending portion that extends in the horizontal direction, and is connected to the horizontal extending portion and bent downward at a substantially right angle from the horizontal extending portion so as to be exposed from the inside of the water heater. A hot water bath apparatus having a vertically extending portion, wherein the protruding portion projects upward from the horizontal extending portion in communication with the interior of the vertically extending portion at the upper end of the extending portion of the vertical extending portion. It is characterized by providing a space.

According to the first aspect of the present invention, the hot water remaining in the pipe connected between the bathtub and the vertically extending portion is added to the inside of the vertically extending portion that has become negative pressure by defrosting after freezing. Thus, even when the residual water inside the vertically extending portion is frozen, the volume expansion when the residual water becomes ice can be absorbed by causing the frozen ice of the residual water to enter the protruding space. Therefore, it is possible to suppress damage to the piping due to the volume expansion with a simple structure in which a protruding space is provided on the extended upper end side of the vertical extending portion.
Furthermore, if a protruding space is provided on the upper end side of the vertical extending portion that is easily affected by a decrease in the outside air temperature by being exposed to the outside of the water heater, the residual inside the vertical extending portion is left in this protruding space. By allowing ice frozen by water to enter, the volume expansion can be absorbed relatively quickly after the vertical extension portion is frozen. Therefore, breakage of the vertically extending portion due to the volume expansion can be effectively suppressed.

It is a schematic block diagram of the bath apparatus with a water heater of embodiment of this invention. It is a principal part longitudinal cross-sectional view which shows the connection state of the piping joint part attached to the bottom face of a bath water heater, and the outgoing pipe connected to a bath heat exchanger.

  An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a schematic configuration of a bath apparatus 1 with a hot water heater according to an embodiment of the present invention. The bath device 1 with a water heater includes a bath water heater 2 and a bathtub 3. In this embodiment, the bath water heater 2 is installed on the first floor of the house, and the bathtub 3 is installed on the second floor of the house. As shown in FIG. 1, the hot water supply combustion block 5 in the bath water heater 2 is provided with a hot water supply heat exchanger 8 to which a water supply pipe 6 and a hot water discharge pipe 7 are connected. Further, the hot water supply combustion block 5 is provided with a first burner 10 for heating the hot water supply heat exchanger 8. A bypass pipe 11 that bypasses the hot water supply heat exchanger 8 is connected between the water supply pipe 6 and the hot water discharge pipe 7. The bypass pipe 11 is provided with a bypass electromagnetic valve 12 that can open and close the bypass pipe 11.

  On the other hand, a bath heat exchanger 18 to which a forward pipe 16 and a return pipe 17 are connected is disposed in the bath combustion block 15 in the bath water heater 2. The forward pipe 16 and the return pipe 17 are connected to the bathtub 3. The return pipe 17 is provided with a bath circulation pump 19 and a branch pipe 20 branched from the hot water pipe 7. The branch pipe 20 is provided with a pouring electromagnetic valve 21 for pouring the return pipe 17 by opening the branch pipe 20. Further, the bath combustion block 15 is provided with a second burner 22 for heating the bath heat exchanger 18. In addition, a control device 23 is disposed in the bath water heater 2, and the control device 23 is connected to both burners 10, 22, the bypass solenoid valve 12 and the pouring solenoid valve 21. The forward pipe 16 and the return pipe 17 are examples of piping connected to the bathtub of the present invention.

  As shown in FIG. 2, a substantially tubular tubular joint 31 is attached to the bottom surface 30 in the bath water heater 2 and is made of resin and extends in the vertical direction of the bath water heater 2 (vertical direction in FIG. 2). The upper side of the pipe joint 31 is accommodated in the bath water heater 2, and the lower side of the pipe joint 31 is exposed from the bottom surface 30 to the outside of the bath water heater 2. A vertical portion 32 is formed inside the pipe joint portion 31 and extends in the vertical direction of the pipe joint portion 31 and penetrates the lower end of the pipe joint portion 31 as a part of the outgoing pipe 16. . The forward pipe 16 connected to the bathtub 3 is connected to the lower end of the vertical portion 32. In addition to this, inside the pipe joint portion 31, it becomes a part of the forward pipe 16 and extends substantially at right angles to the vertical portion 32, and one end side communicates with the upper side of the vertical portion 32 and the other end side is A horizontal portion 33 penetrating the pipe joint portion 31 is formed. The forward pipe 16 connected to the bath heat exchanger 18 is connected to the other end side of the horizontal portion 33. The forward pipe 16 extends horizontally at the bottom of the bath water heater 2 and then extends toward the top of the bath water heater 2. Hereinafter, a portion of the forward pipe 16 that extends horizontally is referred to as a horizontal extending portion 34. In the present embodiment, as shown in FIG. 2, in the middle of the outgoing pipe 16, the outgoing pipe 16 extends from the horizontal extending portion 34 toward the lower end of the vertical portion 32 positioned below the horizontal extending portion 34. It bends at a substantially right angle. The horizontal extending portion 34 is an example of the horizontal extending portion of the present invention, and the vertical portion 32 of the pipe joint portion 31 is an example of the vertical extending portion of the present invention.

  Further, as shown in FIG. 2, the pipe joint portion 31 is formed with a protruding space 36 that is arranged coaxially with the center of the vertical portion 32 and protrudes upward from the extension line of the upper surface of the horizontal extending portion 34. . The protruding space 36 is formed so as to communicate with the upper end of the vertical portion 32. Here, the protruding height upward from the extension line was set to about 8 mm. In addition, a drainage channel 37 is provided inside the pipe joint 31 exposed to the outside from the bath water heater 2. The drainage channel 37 is formed obliquely downward with respect to the extending direction of the vertical portion 32 (up and down direction in FIG. 2). The rear end of the drainage channel 37 communicates with the vertical portion 32, and the front end of the drainage channel 37 opens to the outer surface of the pipe joint portion 31. The upper end of the vertical portion 32 is an example of the extending upper end side of the vertical extending portion of the present invention.

  In the bath apparatus 1 with a water heater configured as described above, a flow rate sensor (not shown) provided in the water supply pipe 6 by opening a faucet (not shown) connected to the hot water pipe 7. When detecting a predetermined amount of water, the control device 23 ignites the first burner 10 and heats the hot water supply heat exchanger 8. Thereby, hot water can be supplied from the hot water discharge pipe 7. At this time, the control device 23 controls the amount of water in the bypass pipe 11 by the bypass solenoid valve 12 so as to adjust the hot water temperature to a predetermined temperature.

  When the hot water switch provided on the remote controller in the bathroom where the bath water heater 2 or the bathtub 3 is disposed is turned on, the control device 23 ignites the first burner 10 and opens the hot water solenoid valve 21. By doing so, hot water is poured from the hot water supply heat exchanger 8 to the return pipe 17 via the branch pipe 20. Therefore, hot water heated by the first burner 10 is poured into the bathtub 3. On the other hand, when bathing, the bath circulation pump 19 is operated to circulate hot water in the bathtub 3. At this time, the control device 23 ignites the second burner 22. Thereby, the hot water circulated by the bath circulation pump 19 is heated to the set temperature. When the hot water temperature reaches the set temperature, the control device 23 stops the second burner 22 and stops the bath circulation pump 19.

  Further, in the present embodiment, as described below, the projecting space 36 is formed in the pipe joint portion 31, which causes a trailing sag from the forward pipe 16 connected to the bath heat exchanger 18 by performing a water flow test or the like. Thus, the pipe joint portion 31 (vertical portion 32) can be prevented from being damaged. In this embodiment, after starting the operation of causing hot water accumulated in the forward pipe 16 to flow down the drainage path 37 (see FIG. 2) and discharging it to the outside of the forward pipe 16, the drainage path 37 is opened after a predetermined time has elapsed. The closing operation is performed. When the bathtub 3 is installed on the second floor of the house as in the present embodiment, the forward pipe 16 connected to the bathtub 3 connected to the lower end of the vertical portion 32 is suspended in a U shape, and the vertical portion 32 is provided. There was a case where hot water from a water flow test or the like remained in a part of the inside or the U-shaped forward pipe 16 connected thereto. In this state, hot water may accumulate in the vertical portion 32 or the horizontal extending portion 34 when a trailing sag from the forward pipe 16 connected to the bath heat exchanger 18 occurs. In the present embodiment, since the air pool is formed in the protruding space 36 communicating with the upper end of the vertical portion 32, it is possible to prevent hot water from being stored in the protruding space 36 even when the trailing sag occurs. . And after outside temperature falls and the inside of the vertical part 32 and the horizontal extension part 34 freezes, for example, when outside temperature falls below 0 degreeC or exceeds it in a short period, the bath water heater 2 of Freezing and de-icing occur in a short cycle in the vertical portion 32 of the pipe joint portion 31 that is susceptible to the outside air temperature by exposing the lower side to the outside. At this time, when the outside air temperature has shifted from a state below 0 ° C. to a state above it, the ice is contained in the bottom of the bath water heater 2 even if the ice melting in the vertical part 32 that is easily affected by the outside air temperature starts. The horizontal extending portion 34 may remain frozen. In this state, when the de-icing part in the vertical part 32 has a negative pressure than the frozen part in the vertical part 32, the water remaining in the forward pipe 16 connected to the lower end of the vertical part 32 is in the vertical part 32. When the outside air temperature falls below 0 ° C. after that, the residual water in the vertical part 32 to which this water is added freezes. In the process in which the outside air temperature falls below 0 ° C., in the vertical part 32, the upper side in the vertical part 32 accommodated in the bath water heater 2 may start to freeze later than the lower side. At that time, since the lower side in the vertical portion 32 and the horizontal extending portion 34 are blocked by freezing, the freezing of the residual water in the upper side in the vertical portion 32 is directed to the protruding space 36. become. And since the ice which the said residual water frozen can enter the protrusion space 36, the volume expansion at the time of the said residual water becoming ice can be absorbed. In particular, when the protruding space 36 is formed so as to communicate with the upper end of the vertical portion 32 that is easily affected by the outside air temperature, the ice is allowed to enter the protruding space 36, so that the ice in the vertical portion 32 can be relatively quickly released. The volume expansion can be absorbed. Thereby, the damage of the pipe joint part 31 (vertical part 32) by the said volume expansion can be suppressed. In this embodiment, it is assumed that the freezing length of the residual water to which the water remaining in the forward pipe 16 is added once will be about 2.5 mm, even if the freezing occurs three times. In order to prevent the pipe joint 31 from being damaged, the protruding height of the protruding space 36 from the extension line to the upper side was set to about 8 mm.

<Effect of this embodiment>
In the bath device 1 with a water heater of the present embodiment, when the protruding space 36 is formed at the upper end of the vertical portion 32 of the pipe joint portion 31 that is easily exposed to the outside air temperature by being exposed to the outside of the bath water heater 2, the vertical By allowing the frozen water remaining in the vertical portion 32 to which water remaining in the forward pipe 16 connected to the lower end of the portion 32 is frozen to enter the protruding space 36, it is relatively early from freezing in the vertical portion 32. In time, it becomes possible to absorb the volume expansion as the residual water becomes ice. Therefore, damage to the pipe joint portion 31 due to the volume expansion can be effectively suppressed with a simple structure in which the protruding space 36 is formed at the upper end of the vertical portion 32.

  The present invention is not limited to the above-described embodiment, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. In the above-described embodiment, the example in which the protruding space 36 is formed so as to communicate with the upper end of the vertical portion 32 has been described. For example, unlike the embodiment described above, the protruding space may be formed so as to communicate with the horizontal extending portion 34 shown in FIG. 2 and protrude upward from the upper surface of the horizontal extending portion 34. In such a case, for example, when a situation occurs in which the horizontal extension portion 34 is partially thawed and blocked, ice frozen by residual water in the vertical portion 32 is horizontally extended from the vertical portion 32. It is possible to enter the protruding space communicating with the installation portion 34. Thereby, the volume expansion at the time of the said residual water becoming ice can be absorbed.

  Further, in addition to forming the protruding space 36 so as to communicate with the upper end of the vertical portion 32 as in the above-described embodiment, the protruding space 36 is communicated with the horizontal extending portion 34 so as to be higher than the upper surface of the horizontal extending portion 34. A protruding space may be formed so as to protrude upward. Further, unlike the above-described embodiment, the protruding height of the protruding space 36 from above the extension line to the upper side is not limited to 8 mm, and may be set to an appropriate value other than 8 mm. In addition, the return pipe 17 connected to the bathtub 3 is connected to the vertical portion 32 of the pipe joint portion 31 and the return pipe 17 connected to the bath heat exchanger 18 is connected to the horizontal portion 33 without being limited to the example of the embodiment described above. You may connect. Also in this case, similarly to the above-described embodiment, it is possible to suppress damage to the pipe joint portion 31.

  1 .... Bath equipment with water heater, 2 .... Bath water heater, 3 .... Bathtub, 16 .... Outward pipe, 17 .... Return pipe, 31 ... Pipe joint, 32 ... Vertical part, 34 ... Horizontal Extension part, 36 ... projecting space.

Claims (1)

A hot water heater disposed at a lower position than the bathtub is connected to the bathtub via a pipe, and a horizontal extending portion extending in a substantially horizontal direction inside the water heater in the middle of the pipe, A water heater that is provided with a vertically extending portion that is connected to a horizontally extending portion and bent downward at a substantially right angle from the horizontally extending portion so as to be exposed from the inside of the water heater. A bath device with a bath
A bath apparatus with a hot water heater, wherein a protruding space that communicates with the inside of the vertical extending portion and protrudes upward from the horizontal extending portion is provided on the extending upper end side of the vertical extending portion.

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