JP2019143860A - Hot water supply device - Google Patents

Abstract

To provide a hot water supply device that facilitates maintenance.SOLUTION: A hot water heating device comprises a housing 10 comprising one opened surface, a front lid covering an opening OP, a heat exchange unit 40 arranged in the housing 10, a controlled unit arranged in the housing 10, and a pipe 5a arranged in the housing 10 and connected to the heat exchange unit 40. The pipe 5a comprises a first pipe 5a1 fixed to the heat exchange unit 40, and a second pipe 5a2 detachably connected to the first pipe 5a1 and the controlled unit respectively. The second pipe is arranged so as to overlap with the controlled unit when the inside of the housing 10 is viewed from the opening OP.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a hot water supply apparatus.

  Conventionally, maintenance such as replacement of parts is performed in a water heater. For example, as an example of a hot water supply device, a narrow type (slim type) hot water supply device is described in Japanese Patent Application Laid-Open No. 2014-70801 (Patent Document 1). In the hot water supply apparatus described in this publication, the front opening is closed by the front cover after the combustion block assembly is inserted into the appliance case through the front opening of the appliance case.

JP 2014-70801 A

  In a conventional hot water supply apparatus, maintenance may be difficult because piping connected to the heat exchange unit may become an obstacle during maintenance. Moreover, in the narrow type hot water supply apparatus described in the above publication, since the width of the water heater is narrow, the pipe connected to the heat exchange unit is arranged in the depth direction of the hot water supply apparatus. Therefore, the pipe is particularly disturbed during maintenance. Therefore, maintenance is particularly difficult.

  This invention is made | formed in view of the said subject, The objective is to provide the hot water supply apparatus with which a maintenance is easy.

  One hot water supply apparatus of the present invention includes a housing having an open surface, a front lid covering the opening, a heat exchange unit disposed in the housing, a controlled unit disposed in the housing, and a housing. And a pipe connected to the heat exchange unit. The pipe includes a first pipe fixed to the heat exchange unit, and a second pipe detachably connected to the first pipe and the controlled unit. The second tube is disposed so as to overlap the controlled unit when the inside of the housing is viewed from the opening.

  According to one hot water supply apparatus of the present invention, the second pipe is detachably connected to the first pipe and the controlled unit, respectively, so that the second pipe overlaps the controlled unit when viewed from the opening. Has been placed. For this reason, the second pipe is not obstructed by the maintenance by removing the second pipe from the first pipe and the controlled unit during maintenance such as replacement of the controlled unit. Therefore, maintenance such as replacement of the controlled unit is facilitated.

  In the hot water supply apparatus according to one aspect of the present invention, the controlled unit is a water amount adjusting device that adjusts the amount of water flowing through the pipe. For this reason, the maintenance of the water amount adjusting device is facilitated.

  One hot water supply apparatus according to the present invention further includes a first quick fastener and a second quick fastener. The first quick fastener removably connects the second tube and the first tube, and the second quick fastener removably connects the second tube and the controlled unit. Therefore, the first quick fastener makes it easy to attach and detach the second tube and the first tube, and the second quick fastener makes it easy to attach and detach the second tube and the controlled unit.

  In the above-described hot water supply apparatus of the present invention, the second pipe is configured to be removable from the controlled unit from the inside of the housing toward the opening. For this reason, it becomes easy to remove the second pipe from the controlled unit.

  Another hot water supply apparatus of the present invention includes a housing having an open surface, a front lid covering the opening, a heat exchange unit disposed in the housing, a controlled unit disposed in the housing, and a housing. And a pipe connected to the heat exchange unit. The piping is arranged so as to overlap the heat exchange unit and not to overlap the controlled unit when the inside of the housing is viewed from the opening.

  According to the other hot water heater of the present invention, the piping is arranged so as not to overlap the controlled unit when the inside of the housing is viewed from the opening. For this reason, the piping does not interfere with maintenance during maintenance such as replacement of the controlled unit. Therefore, maintenance such as replacement of the controlled unit is facilitated.

  In the other hot water supply apparatus of the present invention, the controlled unit is a fan that blows air to the heat exchange unit. This facilitates fan maintenance.

  As described above, according to the present invention, it is possible to provide a hot water supply device that facilitates maintenance.

It is a figure which shows typically the structure of the hot water supply apparatus which concerns on Embodiment 1, 2 of this invention. It is a perspective view which shows roughly the structure of the hot water supply apparatus which concerns on Embodiment 1, 2 of this invention. It is a front view which shows roughly the structure of the housing | casing of the hot water supply apparatus which concerns on Embodiment 1, 2 of this invention, a heat exchange unit, a to-be-controlled unit, and piping. It is a perspective view which shows schematically the structure of the heat exchange unit and hot water supply circuit of the hot water supply apparatus which concern on Embodiment 1, 2 of this invention. It is an enlarged view of the V section of FIG. It is a perspective view which shows the state which the quick fastener of the hot-water supply apparatus which concerns on Embodiment 1, 2 of this invention has connected the 1st pipe | tube and the 2nd pipe | tube. It is a front view which shows the state from which the 2nd pipe | tube of the hot water supply apparatus which concerns on Embodiment 1 of this invention was removed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A hot water heating apparatus will be described as an example of a hot water supply apparatus according to an embodiment of the present invention.

(Embodiment 1)
With reference to FIG. 1, the structure of the hot water heating apparatus which concerns on Embodiment 1 of this invention is demonstrated. As shown in FIG. 1, the hot water heater according to the present embodiment includes a cistern 1, a water replenishment circuit 2, a circulation circuit 3, a combustion unit 4, a hot water supply circuit 5, a pipe 6 (overflow pipe), A fan 7 and a water amount adjusting device 8 are provided. In the present embodiment, the controlled unit is the water amount adjusting device 8.

  The water replenishment circuit 2 has a pipe 2a. The circulation circuit 3 includes a pipe 3a, a pipe 3b, a pipe 3c, a pipe 3d, a pipe 3e, a pipe 3f, and a pump 3g. The combustion unit 4 includes a primary heat exchanger 4a, a secondary heat exchanger 4b, a primary heat exchanger 4c, a secondary heat exchanger 4d, and a burner 4e. The hot water supply circuit 5 includes a pipe 5a, a pipe 5b, a pipe 5c, and a pipe 5d.

  One end of the pipe 2 a is connected to the cistern 1. The other end of the pipe 2a is connected to the water supply. The pipe 6 is connected to the cistern 1 at one end and is connected to the outside of the hot water heater at the other end.

  One end of the pipe 3 a is connected to the cistern 1. The other end of the pipe 3a is connected to a portion where one end of the pipe 3b and one end of the pipe 3c are connected. The other end of the pipe 3b is connected to the low temperature heating terminal 6a. The other end of the pipe 3c is connected to the primary heat exchanger 4a. One end of the pipe 3d is connected to the primary heat exchanger 4a. The other end of the pipe 3d is connected to the high temperature heating terminal 6b.

  The pipe 3e is branched at one end. One of the pipes 3e branched at one end is connected to the low temperature heating terminal 6a. The other of the pipes 3e branched at one end is connected to the high temperature heating terminal 6b. The other end of the pipe 3e is connected to the secondary heat exchanger 4b. One end of the pipe 3f is connected to the secondary heat exchanger 4b. The other end of the pipe 3 f is connected to the cistern 1. The pump 3g is arrange | positioned on the path | route of the piping 3a. The pump 3g circulates the water stored in the cistern 1 along the circulation circuit 3 (see the direction of the arrow in FIG. 1).

  One end of the pipe 5a is connected to the water supply. The other end of the pipe 5a is connected to the secondary heat exchanger 4d. The secondary heat exchanger 4d is connected to the primary heat exchanger 4c via a pipe 5d. One end of the pipe 5b is connected to the secondary heat exchanger 4d. The other end of the pipe 5b is connected to a currant or the like. The pipe 5c is connected to the pipe 5a and the pipe 5b.

  The burner 4e generates combustion gas. The burner 4e is disposed in the vicinity of the primary heat exchanger 4a and the primary heat exchanger 4c. The primary heat exchanger 4a and the primary heat exchanger 4c exchange heat with the burner 4e. The secondary heat exchanger 4b and the secondary heat exchanger 4d exchange heat between the primary heat exchanger 4a and the primary heat exchanger 4c and the residual heat of the burner 4e after heat exchange. The primary heat exchanger 4a, the secondary heat exchanger 4b, the primary heat exchanger 4c, and the secondary heat exchanger 4d are, for example, fin-and-tube heat exchangers. In the present embodiment, the burner 4e is disposed below the combustion unit 4. That is, the burner 4e is a positive combustion system.

  The fan 7 supplies a mixed gas in which fuel and air are mixed to the burner 4e. In the present embodiment, as indicated by the white arrow in FIG. 1, the fan 7 supplies the mixed gas upward with respect to the burner 4e.

  The water amount adjusting device 8 adjusts the amount of water flowing through the pipe. The water amount adjusting device 8 includes a bypass flow rate adjusting valve 8a that adjusts the flow rate that passes through the pipe 5c, and a water flow rate adjusting valve 8b that adjusts the hot water flow rate.

Next, the operation of the hot water heater according to the present embodiment will be described.
First, the heating operation by the hot water heater according to the present embodiment will be described. From the water supply, water is supplied to the cistern 1 through the pipe 2a. When the amount of water stored in the cistern 1 becomes excessive, the water stored in the cistern 1 is discharged to the outside through the pipe 6.

  The water stored in the cistern 1 is supplied to the primary heat exchanger 4a via the pipe 3a and the pipe 3c. The temperature of the water supplied to the primary heat exchanger 4a is raised. The water heated in the primary heat exchanger 4a is supplied to the high temperature heating terminal 6b via the pipe 3d.

  The high temperature heating terminal 6b performs a heating operation with water supplied through the pipe 3d. The water which performed the heating operation in the high temperature heating terminal 6b is supplied to the secondary heat exchanger 4b through the pipe 3e. The water supplied to the secondary heat exchanger 4b is heated. The water whose temperature has been raised in the secondary heat exchanger 4b is returned to the system 1 through the pipe 3f.

  The water stored in the cistern 1 is supplied to the low temperature heating terminal 6a via the pipe 3a and the pipe 3b. The low temperature heating terminal 6a performs a heating operation with water supplied through the pipe 3a and the pipe 3b. The water that has been heated in the low-temperature heating terminal 6a is supplied to the secondary heat exchanger 4b through the pipe 3e. The water supplied to the secondary heat exchanger 4b is heated. The water whose temperature has been raised in the secondary heat exchanger 4b is returned to the systern 1 again through the pipe 3f.

  Then, the hot water supply operation | movement by the hot water heating apparatus which concerns on embodiment is demonstrated. Water is supplied from the water supply to the primary heat exchanger 4c and the secondary heat exchanger 4d via the pipe 5a. The water supplied to the primary heat exchanger 4c and the secondary heat exchanger 4d is heated. The water whose temperature has been raised in the primary heat exchanger 4c and the secondary heat exchanger 4d is supplied to the curan or the like through the pipe 5b.

  Next, with reference to FIGS. 2-7, the structure of each component of the hot water heating apparatus which concerns on this Embodiment is demonstrated. FIG. 2 shows a state where the front lid 11 is attached to the casing 10 of the hot water heating apparatus according to the present embodiment. The hot water heating apparatus according to the present embodiment is a narrow type hot water heating apparatus.

  As shown in FIG. 2, the hot water heating apparatus according to the present embodiment has a housing 10 and a front lid 11. The housing 10 has an open surface. The front lid 11 covers the opening OP (see FIG. 3). The housing 10 includes a top plate 10a, a bottom plate 10b, a side plate 10c, a side plate 10d, and a back plate 10e. The ends of the top plate 10a, the bottom plate 10b, the side plate 10c, and the side plate 10d opposite to the back plate 10e constitute an opening OP. The top plate 10a faces the bottom plate 10b. The side plate 10c, the side plate 10d, and the back plate 10e are connected to the top plate 10a and the bottom plate 10b. The side plate 10c is opposed to the side plate 10d. The back plate 10 e faces the front lid 11.

  The front lid 11 is configured to be removable from the housing 10. The housing 10 is opened on the front lid 11 side by removing the front lid 11. From another point of view, the inside of the housing 10 can be accessed by removing the front cover 11. The front lid 11 is provided with an exhaust port 11a.

  The direction from the front lid 11 toward the back plate 10e is along the first direction DR1. The second direction DR2 is orthogonal to the first direction DR1. The second direction DR2 is along the direction from the side plate 10d toward the side plate 10c. The third direction DR3 is orthogonal to each of the first direction DR1 and the second direction DR2. The third direction DR3 is along the direction from the bottom plate 10b to the top plate 10a.

  The housing 10 has a width (depth) W1 and a width W2. The width W1 is the width of the housing 10 in the first direction DR1. The width W2 is the width of the housing 10 in the second direction DR2. From another point of view, the width W1 is the distance between the front lid 11 and the back plate 10e, and the width W2 is the distance between the side plate 10c and the side plate 10d. The width W1 is larger than the width W2. Therefore, the hot water heating apparatus according to the present embodiment is installed so that front cover 11 is orthogonal to the outer wall of the house (installed so that side plate 10c and side plate 10d face the outer wall of the house).

  FIG. 3 is a view showing the casing 10 of the hot water heating apparatus according to the present embodiment from the opening OP side. FIG. 3 shows the combustion unit 4, the hot water supply circuit 5, the fan 7, and the water amount adjusting device 8 among the components for convenience of explanation, and other components are not shown. FIG. 4 shows the hot water supply circuit 5 and the heat exchange unit 40.

  As shown in FIGS. 3 and 4, the combustion unit 4 has a heat exchange unit 40. The heat exchange unit 40 is disposed in the housing 10. The heat exchange unit 40 includes a primary heat exchange unit 41 and a secondary heat exchange unit 42. The primary heat exchange unit 41 includes a primary heat exchanger 4a and a primary heat exchanger 4c.

  As shown in FIGS. 2 and 4, the primary heat exchanger 4a is disposed on the back plate 10e side. The primary heat exchanger 4c is disposed on the front lid 11 side. The secondary heat exchange unit 42 includes a secondary heat exchanger 4b and a secondary heat exchanger 4d. The secondary heat exchanger 4b is disposed on the back plate 10e side. The secondary heat exchanger 4d is disposed on the front lid 11 side.

  As shown in FIGS. 3 and 4, the burner 4 e is arranged in the housing 10. The primary heat exchange part 41 is arrange | positioned above the burner 4e. The secondary heat exchange unit 42 is disposed above the primary heat exchange unit 41.

  The fan 7 is disposed in the housing 10. The fan 7 is disposed below the burner 4e. The water amount adjusting device 8 is disposed in the housing 10. The water amount adjusting device 8 is disposed below the fan 7.

  The pipe 5a, the pipe 5b, the pipe 5c, and the pipe 5d are arranged in the housing 10. The pipe 5 a, the pipe 5 b, and the pipe 5 c are connected to the heat exchange unit 40 and the water amount adjusting device 8. The pipe 5a is connected to the secondary heat exchanger 4d of the secondary heat exchange unit 42 and the bypass flow rate adjustment valve 8a. The pipe 5a has a first pipe 5a1 and a second pipe 5a2. The first pipe 5a1 is fixed to the heat exchange unit 40. Specifically, the first pipe 5 a 1 is fixed to the secondary heat exchanger 4 d of the secondary heat exchange unit 42. The second pipe 5a2 is detachably connected to the first pipe 5a1 and the bypass flow rate adjustment valve 8a.

  The second pipe 5a2 has a portion disposed between the opening OP and the bypass flow rate adjustment valve 8a along the first direction DR1. The second pipe 5a2 is disposed so as to overlap the bypass flow rate adjustment valve 8a when the inside of the housing 10 is viewed from the opening OP. That is, the second pipe 5a2 is arranged so as to overlap the bypass flow rate adjustment valve 8a between the opening OP and the bypass flow rate adjustment valve 8a when the inside of the housing 10 is viewed from the opening OP.

  The pipe 5b is connected to the primary heat exchanger 4c and the water flow rate adjustment valve 8b of the primary heat exchange unit 41. The pipe 5b has a first pipe 5b1 and a second pipe 5b2. The first pipe 5b1 is fixed to the heat exchange unit 40. Specifically, the first pipe 5b1 is fixed to the primary heat exchanger 4c of the primary heat exchange unit 41. The second pipe 5b2 is detachably connected to the first pipe 5b1 and the water flow rate adjustment valve 8b, respectively.

  The second pipe 5b2 has a portion disposed between the opening OP and the water flow rate adjustment valve 8b along the first direction DR1. The second pipe 5b2 is disposed so as to overlap the water flow rate adjustment valve 8b when the inside of the housing 10 is viewed from the opening OP. That is, the second pipe 5b2 is disposed so as to overlap the water flow rate adjustment valve 8b between the opening OP and the water flow rate adjustment valve 8b when the inside of the housing 10 is viewed from the opening OP.

  The pipe 5c is connected to the pipe 5b and the bypass flow rate adjustment valve 8a. The pipe 5c is connected to the primary heat exchanger 4c of the primary heat exchange unit 41 via the pipe 5b. The pipe 5c has a first pipe 5c1 and a second pipe 5c2. The first pipe 5c1 is fixed to the heat exchange unit 40 via the first pipe 5b1 of the pipe 5b. Specifically, the first pipe 5c1 is fixed to the first pipe 5b1 of the pipe 5b. The second pipe 5c2 is detachably connected to the first pipe 5c1 and the bypass flow rate adjustment valve 8a.

  The second pipe 5c2 has a portion disposed between the opening OP and the bypass flow rate adjustment valve 8a along the first direction DR1. The 2nd pipe | tube 5c2 is arrange | positioned so that it may overlap with the bypass flow regulating valve 8a when the inside of the housing | casing 10 is seen from opening OP. That is, the second pipe 5c2 is disposed so as to overlap the bypass flow rate adjustment valve 8a between the opening OP and the bypass flow rate adjustment valve 8a when the inside of the housing 10 is viewed from the opening OP.

  The pipe 5 d is connected to the primary heat exchanger 4 c of the primary heat exchange unit 41 and the secondary heat exchanger 4 d of the secondary heat exchange unit 42.

  The end of the second pipe 5a2 of the pipe 5a on the connection side with the first pipe 5a1 extends along the second direction DR2. The end of the second pipe 5a2 of the pipe 5a on the connection side with the bypass flow rate adjustment valve 8a extends along the first direction DR1 with respect to the bypass flow rate adjustment valve 8a. Therefore, the second pipe 5a2 is configured to be removable from the bypass flow rate adjustment valve 8a from the inside of the housing 10 toward the opening OP.

  The end of the second pipe 5b2 of the pipe 5b on the connection side with the first pipe 5b1 extends along the second direction DR2. The end of the second pipe 5b2 of the pipe 5b on the connection side with the water flow rate adjustment valve 8b extends along the first direction DR1 with respect to the water flow rate adjustment valve 8b. Therefore, the second pipe 5b2 is configured to be removable from the water flow rate adjustment valve 8b from the inside of the housing 10 toward the opening OP.

  The end of the second pipe 5c2 of the pipe 5c on the connection side with the first pipe 5c1 extends along the second direction DR2. The end of the second pipe 5c2 of the pipe 5c on the connection side with the bypass flow rate adjustment valve 8a extends along the first direction DR1 with respect to the bypass flow rate adjustment valve 8a. Therefore, the second pipe 5c2 is configured to be removable from the bypass flow rate adjustment valve 8a from the inside of the housing 10 toward the opening OP.

  The hot water heater according to the embodiment includes a quick fastener CF. The quick fastener CF includes a first quick fastener CF1 and a second quick fastener CF2. The first quick fastener CF1 removably connects the second pipe 5a2 and the first pipe 5a1 of the pipe 5a. The second quick fastener CF2 removably connects the second pipe 5a2 of the pipe 5a and the bypass flow rate adjustment valve 8a.

  The first quick fastener CF1 removably connects the second pipe 5b2 and the first pipe 5b1 of the pipe 5b. The second quick fastener CF2 detachably connects the second pipe 5b2 of the pipe 5b and the water flow rate adjustment valve 8b.

  The first quick fastener CF1 removably connects the second pipe 5c2 and the first pipe 5c1 of the pipe 5c. The second quick fastener CF2 removably connects the second pipe 5c2 of the pipe 5c and the bypass flow rate adjustment valve 8a.

  The configuration of the quick fastener CF will be described with reference to FIGS. 5 and 6. Here, a case where the first pipe 5c1 and the second pipe 5c2 of the pipe 5c are detachably connected by the first quick fastener CF1 will be described. As for the pipe 5a and the pipe 5b, similarly to the pipe 5c, the first pipes 5a1, 5b1 and the second pipes 5a2, 5b2 are detachably connected by the quick fasteners CF, respectively. In addition, each of the pipes 5a, 5b, and 5c is detachably connected to the water amount adjusting device 8 by the quick fastener CF.

  As shown in FIG. 5 and FIG. 6, the first quick fastener CF1 includes a central portion CP, a first end E1 connected to one end side of the central portion CP, and the other end side of the central portion CP. And a second end E2 connected thereto.

  The first end E1 is configured to be away from the second end E2 toward the tip opposite to the central portion CP. The first end E1 has a curved portion C1 provided between the central portion CP and the tip. A through hole H1 is provided in the first end E1. The through hole H1 extends along the longitudinal direction of the first end E1.

  The second end E2 is configured to be separated from the first end E1 toward the tip opposite to the central portion CP. The second end E2 has a curved portion C2 provided between the central portion CP and the tip. A through hole H2 is provided in the second end E2. The through hole H2 extends along the longitudinal direction of the second end E2.

  The first quick fastener CF1 is elastically deformed so that the distance between the first end E1 and the second end E2 varies. The first tube 5c1 and the second tube are interposed between the bending portion C1 and the bending portion C2 in a state in which the enlarged diameter portions of the first tube 5c1 and the second tube 5c2 of the piping 5c are inserted into the through hole H1 and the through hole H2. Each of 5c2 is sandwiched. Accordingly, the first quick fastener CF1 attaches the first pipe 5c1 and the second pipe 5c2 of the pipe 5c to each other. Moreover, the quick fastener CF is removed from the first tube 5c1 and the second tube 5c2 by increasing the distance between the first end E1 and the second end E2. In this way, the quick fastener CF removably connects the first pipe 5c1 and the second pipe 5c2.

  As shown in FIGS. 3 and 7, the second pipe 5a2 of the pipe 5a is removed from the first pipe 5a1 and removed from the bypass flow rate adjusting valve 8a. Thereby, the bypass flow rate adjusting valve 8a is not covered by the second pipe 5a2. Therefore, the second pipe 5a2 does not prevent the bypass flow rate adjusting valve 8a from being attached or detached. The second pipe 5b2 of the pipe 5b is removed from the first pipe 5b1 and is removed from the water flow rate adjustment valve 8b. Thereby, the water flow rate adjusting valve 8b is not covered by the second pipe 5b2. Therefore, the 2nd pipe | tube 5b2 does not prevent attachment or detachment of the water flow regulating valve 8b. The second pipe 5c2 of the pipe 5c is removed from the first pipe 5c1 and removed from the bypass flow rate adjustment valve 8a. Thereby, the bypass flow rate adjusting valve 8a is not covered by the second pipe 5c2. That is, the second pipe 5c2 does not prevent the bypass flow rate adjusting valve 8a from being attached or detached.

Next, the effect of the hot water heating apparatus according to the present embodiment will be described.
According to the hot water heating apparatus according to the present embodiment, the second pipe 5a2 of the pipe 5a is detachably connected to the first pipe 5a1 and the bypass flow rate adjustment valve 8a, and the interior of the housing 10 is opened from the opening OP. It is arranged so as to overlap with the bypass flow rate adjusting valve 8a when viewed. For this reason, the second pipe 5a2 does not interfere with the maintenance by removing the second pipe 5a2 from the first pipe 5a1 and the bypass flow regulating valve 8a of the pipe 5a during maintenance such as replacement of the bypass flow regulating valve 8a. Therefore, maintenance such as replacement of the bypass flow rate adjusting valve 8a is facilitated. That is, since the second pipe 5a2 is only removed compared to the case where the entire pipe 5a fixed to the heat exchange unit 40 is removed, maintenance is facilitated. Further, since the second pipe 5a2 is detachable as compared with the case where the entire pipe 5a is fixed to the heat exchange unit 40 by brazing or the like, maintenance is facilitated. Furthermore, since the 2nd pipe | tube 5a2 is removed, malfunctions, such as the pipe 5a being bent at the time of a maintenance, can be suppressed.

  The second pipe 5b2 of the pipe 5b is detachably connected to the first pipe 5b1 and the water flow rate adjustment valve 8b, respectively. When the interior of the housing 10 is viewed from the opening OP, the water flow rate adjustment valve 8b and They are arranged so as to overlap. For this reason, the second pipe 5a2 does not interfere with the maintenance by removing the second pipe 5a2 from the first pipe 5b1 and the water flow rate adjusting valve 8b of the pipe 5b during maintenance such as replacement of the water flow rate adjusting valve 8b. Therefore, maintenance such as replacement of the water flow rate adjustment valve 8b is facilitated.

  Further, the second pipe 5c2 of the pipe 5c is detachably connected to the first pipe 5c1 and the bypass flow rate adjustment valve 8a, respectively. When the inside of the housing 10 is viewed from the opening OP, the second flow rate adjustment valve 8a They are arranged so as to overlap. For this reason, when the second pipe 5c2 is removed from the first pipe 5c1 and the bypass flow regulating valve 8a of the pipe 5c during maintenance such as replacement of the bypass flow regulating valve 8a, the second pipe 5c2 does not interfere with the maintenance. Therefore, maintenance such as replacement of the bypass flow rate adjusting valve 8a is facilitated.

  In a general narrow-type hot water heater, the pipe connected to the heat exchange unit is arranged in the depth direction of the hot water heater, so that the pipe is particularly disturbed during maintenance. On the other hand, according to the hot water heating device according to the present embodiment, the second pipes 5a2, 5b2, 5c2 are removed from the water amount adjusting device 8, so even if it is a narrow type hot water heating device, The pipes 5a2, 5b2, and 5c2 do not interfere with maintenance such as replacement of the water amount adjusting device 8. Therefore, the hot water heating apparatus according to the present embodiment is particularly suitable for a narrow type hot water heating apparatus.

  In the hot water heater according to the present embodiment, the controlled unit is a water amount adjusting device 8. For this reason, the maintenance of the water amount adjusting device 8 becomes easy.

  In the hot water heater according to the present embodiment, the first quick fastener CF1 removably connects the second pipe 5a2 and the first pipe 5a1 of the pipe 5a, and the second quick fastener CF2 is the second pipe 5a2. And the bypass flow rate adjusting valve 8a are detachably connected. Therefore, the first quick fastener CF1 makes it easy to attach and detach the second pipe 5a2 and the first pipe 5a1, and the second quick fastener CF2 makes it easy to attach and detach the second pipe 5a2 and the bypass flow rate adjustment valve 8a. . Also, the quick fastener CF can be connected and detached without using a tool such as a screwdriver, so it is easy to attach and detach.

  Further, the first quick fastener CF1 removably connects the second pipe 5b2 and the first pipe 5b1 of the pipe 5b, and the second quick fastener CF2 connects the second pipe 5b2 and the water flow rate adjusting valve 8b. Removably connected. Therefore, the first quick fastener CF1 makes it easy to attach and detach the second pipe 5b2 and the first pipe 5b1, and the second quick fastener CF2 makes it easy to attach and detach the second pipe 5b2 and the water flow rate adjusting valve 8b. .

  The first quick fastener CF1 removably connects the second pipe 5c2 and the first pipe 5c1 of the pipe 5c to each other, and the second quick fastener CF2 includes each of the second pipe 5c2 and the bypass flow rate adjustment valve 8a. And are detachably connected. Therefore, the first quick fastener CF1 makes it easy to attach and detach the second pipe 5c2 and the first pipe 5c1, and the second quick fastener CF2 makes it easy to attach and detach the second pipe 5c2 and the bypass flow rate adjustment valve 8a. .

  In the hot water heater according to the present embodiment, the second pipe 5a2 of the pipe 5a is configured to be removable from the bypass flow rate adjustment valve 8a from the inside of the housing 10 toward the opening OP. For this reason, it becomes easy to remove the 2nd pipe | tube 5a2 from the bypass flow regulating valve 8a.

  The second pipe 5b2 of the pipe 5b is configured to be removable from the water flow rate adjustment valve 8b from the inside of the housing 10 toward the opening OP. For this reason, it becomes easy to remove the 2nd pipe | tube 5b2 from the water flow regulating valve 8b.

  The second pipe 5c2 of the pipe 5c is configured to be removable from the bypass flow rate adjustment valve 8a from the inside of the housing 10 toward the opening OP. For this reason, it becomes easy to remove the 2nd pipe | tube 5c2 from the bypass flow regulating valve 8a.

(Embodiment 2)
In the second embodiment of the present invention, the same components as those of the first embodiment of the present invention described above are provided unless otherwise described. Therefore, the same reference numerals are given to the same elements, and the description thereof is not repeated. .

  Referring to FIG. 3 again, the configuration of the hot water heating apparatus according to the present embodiment will be described. As shown in FIG. 3, the controlled unit is a fan 7. The fan 7 blows air to the heat exchange unit 40. In addition, each of the pipes 5a, 5b, and 5c is arranged so as to overlap the heat exchange unit 40 and not to overlap the fan 7 when the inside of the housing 10 is viewed from the opening OP. Accordingly, the pipes 5a, 5b, and 5c are not arranged on the projection surface of the fan 7 in the attaching / detaching direction when the fan 7 is attached / detached along the first direction DR1.

  Specifically, each of the pipes 5a, 5b, and 5c has a portion disposed between the opening OP and the heat exchange unit 40 along the first direction DR1. Each of the pipes 5a, 5b, and 5c is arranged so as not to overlap the fan 7 along the first direction DR1. Each of the pipes 5a, 5b, and 5c is disposed with a gap from the fan 7 along each of the second direction DR2 and the third direction DR3 when the inside of the housing 10 is viewed from the opening OP.

Next, the effect of the hot water heating apparatus according to the present embodiment will be described.
According to the hot water heating apparatus according to the present embodiment, the pipes 5a, 5b, and 5c are arranged so as not to overlap the fan 7 when the inside of the housing 10 is viewed from the opening OP. For this reason, at the time of maintenance such as replacement of the fan 7, the pipes 5a, 5b, and 5c do not interfere with the maintenance. Therefore, maintenance such as replacement of the fan 7 becomes easy.

  In the hot water heater according to the present embodiment, the controlled unit is the fan 7. For this reason, the maintenance of the fan 7 becomes easy.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Systurn, 2 Replenishment circuit, 2a, 3a, 3b, 3c, 3d, 3e, 3f, 5a, 5b, 5c, 5d, 6 Piping, 3 Circulation circuit, 4 Combustion unit, 4a, 4c Primary heat exchanger, 4b, 4d secondary heat exchanger, 4e burner, 5 hot water supply circuit, 5a1, 5b1, 5c1 first pipe, 5a2, 5b2, 5c2 second pipe, 6a low temperature heating terminal, 6b high temperature heating terminal, 7 fan, 8 water amount adjustment device, 8a Bypass flow adjustment valve, 8b Water flow adjustment valve, 10 housing, 11 front cover, 40 heat exchange unit, 41 primary heat exchange part, 42 secondary heat exchange part, CF quick fastener, OP opening.

Claims (6)

A housing having an open side;
A front lid covering the opening;
A heat exchange unit disposed in the housing;
A controlled unit disposed in the housing;
A pipe disposed in the housing and connected to the heat exchange unit;
The pipe includes a first pipe fixed to the heat exchange unit, and a second pipe detachably connected to the first pipe and the controlled unit, respectively.
The said 2nd pipe | tube is a hot water supply apparatus arrange | positioned so that it may overlap with the said to-be-controlled unit when the inside of the said housing | casing is seen from the said opening.   The hot water supply device according to claim 1, wherein the controlled unit is a water amount adjusting device that adjusts an amount of water flowing through the pipe. A first quick fastener and a second quick fastener;
The first quick fastener detachably connects the second tube and the first tube,
The hot water supply apparatus according to claim 1 or 2, wherein the second quick fastener detachably connects the second pipe and the controlled unit.   The hot water supply apparatus according to any one of claims 1 to 3, wherein the second pipe is configured to be removable from the controlled unit from the inside of the housing toward the opening. A housing having an open side;
A front lid covering the opening;
A heat exchange unit disposed in the housing;
A controlled unit disposed in the housing;
A pipe disposed in the housing and connected to the heat exchange unit;
The hot water supply apparatus, wherein the pipe is arranged so as to overlap the heat exchange unit and not to overlap the controlled unit when the inside of the casing is viewed from the opening. The hot water supply apparatus according to claim 5, wherein the controlled unit is a fan that blows air to the heat exchange unit.