JP2013221709A - Metal fitting for heater attachment, and water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal fitting for heater attachment that when a heater is attached to various equipment constituting a water heater or a constituent member such as piping, enables efficient heat transfer between the heater and an object to be heated, and to provide the water heater in which the constituent member fitted with the heater with such metal fittings for heater attachment is built in.SOLUTION: Metal fittings 1 for heater attachment that can support a heater 7 while being fitted to a constituent member constituting a water heater are provided with a reflection plate 28 for reflecting radiant heat emitted from the heater. Then the heater 7 can be supported while the heater 7 and reflection plate 28 are separated from each other.

Description

  The present invention relates to a mounting bracket for mounting a heater to various components or pipes or other components constituting a hot water supply apparatus. Further, the present invention relates to a hot water supply apparatus incorporating a structural member to which a heater is attached with such a mounting bracket.

  2. Description of the Related Art Hot water supply devices that heat hot water supplied from an external water supply source and supply high-temperature hot water from hot water taps such as showers and currants are widely used. Such a hot water supply apparatus generally includes a combustion unit for burning fuel to generate combustion gas, a heat exchanger for raising the temperature of hot water by performing heat exchange between the combustion gas and hot water, A flowing water path from the water supply source to the hot water tap through the heat exchanger is provided. When there is a demand for hot water, such as when the currant is opened at the hot water tap, the hot water flows from the water supply source to the hot water tap through the water flow path, and is exchanged with the combustion gas when passing through the heat exchanger. Be warmed. As a result, the hot water is supplied from the hot water tap.

By the way, when this type of hot water supply device is operated in a cold region where the temperature of the outside air is low, there is a problem that the hot water remaining in the flowing water path is cooled by the outside air and freezes.
More specifically, in the hot water supply apparatus, when the hot water discharge operation is performed once and then the hot water discharge operation is stopped, the hot water remains in the flowing water path. That is, hot water remains in the hot water flow paths formed in various devices such as a heat exchanger and the pipes connecting them. In this state, when the remaining hot water is cooled by the outside air, the hot water is frozen inside the equipment and piping. And if the hot water remaining in the flowing water path freezes in this way, not only hot water can not be supplied from the hot water tap, but also causes damage to various devices and pipes constituting the hot water supply device.

  Then, the technique which prevents the freezing of the hot water in a flowing water path | route is known by attaching a heater to the various apparatuses which comprise a hot-water supply apparatus, or piping.

For example, Patent Document 1 discloses a method for enabling a heater to be attached to a water pressure responsive gas valve, which is a device constituting a hot water supply apparatus, and a pipe by the same method, and a heater mounting clip (metal fitting) used in the method. ) Is disclosed. Here, the clip (metal fitting) is composed of a grip portion having a substantially “U” cross-sectional shape and two bent end portions extending from the edge portion of the open end of the grip portion. The two bent end portions are arranged so as to be parallel to each other with a space therebetween, and both are bent inward. That is, the overall shape of the clip (metal fitting) also has a substantially “U” cross-sectional shape, and is in a state where the ends on the open end side are bent toward each other.
And in the clip (metal fitting) of patent document 1, when fixing a heater and a heating object, three surfaces among the side surfaces of a prismatic heater, and the inner surface of the holding part whose section is "U" shape, Is in a state where the heater is fitted into the gripping part so that they come into contact with each other. In this state, the heating target is sandwiched between the bent ends, so that the heater and the heating target are fixed while the remaining one of the side surfaces of the heater is in contact with the heating target.

  Patent Document 2 discloses a metal fitting for attaching a heater to a tubular portion of a heat exchanger. The heater mounting bracket described in Patent Literature 2 has a clip portion for holding the tubular portion and a holder portion for supporting the heater, and the tubular portion and the heater are arranged in parallel in the vertical direction. It is a metal fitting for fixing. Here, the holder portion is formed on the upper side of the clip portion, and the rectangular flat plate-like standing piece standing upright and the rectangular flat plate-like upper portion protruding in the horizontal direction from both ends of the vertical piece in the vertical direction. It is composed of a piece and a lower nail. The upright pieces, the upper pieces, and the lower claws are formed so that the cross-sectional shape is substantially “U” shape, and a prismatic heater is fitted and attached to the space formed by them. ing. That is, in the mounting bracket of Patent Document 2, the heater is supported by the bracket in a state in which most of one side surface of the heater and the standing piece of the bracket are in close contact, and most of the upper surface of the heater and the upper piece of the bracket are in close contact. The

  Furthermore, Patent Literature 3 discloses a mounting bracket formed by bending a wire. The mounting bracket disclosed in Patent Document 3 tightens and fixes the pipe and the heater by winding the wire (the mounting bracket itself) across the outer peripheral surfaces of the pipe and the heater in a state where the pipe and the heater are in close contact with each other. doing. Therefore, in the mounting bracket of Patent Document 3, the heater is fixed to the bracket in a state where most of the outer peripheral surface of the heater excluding the portion in contact with the pipe is exposed to the outside.

Japanese Patent Publication No. 4-23176 Japanese Utility Model Publication No. 63-150248 Registered Utility Model No. 3007956

  However, when the heater is attached to the object to be heated with the conventional heater mounting bracket, there is a problem that a large part of the heat generated from the heater is not transferred to the object to be heated, resulting in low heat transfer efficiency.

  For example, in the clip (metal fitting) disclosed in Patent Document 1, all three surfaces of the prismatic heater except for one surface that contacts the heating target are in contact with the clip (metal fitting). ing. In this case, most of the heat generated from one surface in contact with the object to be heated is transferred to the object to be heated, but the heat generated from the other three surfaces is a significant percentage of clips (metal fittings). The heat is radiated to the outside (in the air) via Therefore, much of the heat generated from the heater is radiated to the outside without being transferred to the object to be heated.

  Further, in the metal fitting disclosed in Patent Document 2, a pipe to be heated is located below the heater, and one of the heater upper surface and the heater side surface is in contact with the metal fitting. . In this case as well, most of the heat generated from the lower surface side of the heater is transferred to the piping to be heated, but the heat generated from one of the upper surface of the heater and the side surface of the heater. Most of the heat is radiated to the outside (in the air) through the metal fittings. For this reason, much of the heat generated from the heater is radiated to the outside without being transferred to the piping to be heated.

  In the metal fitting disclosed in Patent Document 3, a wire rod (mounting metal fitting itself) is wound and the pipe and the heater are fastened and fixed, and the outer peripheral surface of the heater is exposed to the outside except for a portion in contact with the pipe. ing. In this case, most of the heat generated from the portion of the outer peripheral surface of the heater that is in contact with the pipe is transferred to the pipe to be heated. Heat generated from a portion not in contact with the heat is radiated as it is into the air. For this reason, much of the heat generated from the heater is radiated to the outside without being transferred to the piping to be heated.

  As described above, when the heater is attached to the heating target with the conventional heater mounting bracket, most of the heat generated from the portion located on the heating target side in the outer peripheral surface of the heater is transferred to the heating target. However, most of the heat generated from the other part of the outer peripheral surface of the heater, that is, the part not facing the heating target side, is not transferred and there is a problem that the heat transfer efficiency is lowered.

  Therefore, in view of the above-described problems of the prior art, the present invention enables efficient heat transfer between the heater and the object to be heated when the heater is attached to components such as various devices or pipes constituting the hot water supply apparatus. It is an object of the present invention to provide a heater mounting bracket and a hot water supply apparatus incorporating a component to which a heater is mounted by such a heater mounting bracket.

  Invention of Claim 1 for solving the said subject is a bracket for heater attachment for attaching a heater with respect to the structural member which comprises a hot-water supply apparatus, The holder part which can support the said heater, and self A heater mounting bracket capable of supporting the heater in a state of being attached to the component member, and for reflecting radiant heat generated from the heater. The heater mounting bracket is characterized in that, in a state where the heater is supported by the holder portion, the heater and the reflector plate portion are separated from each other.

  The heater mounting bracket of the present invention has a reflecting plate portion for reflecting radiant heat generated from the heater, and the reflecting plate portion is located at a position away from the heater in a state where the heater is supported. Therefore, the component which becomes the object to be heated by reflecting the heat emitted from the surface of the outer peripheral surface of the heater which does not face the heating target side, that is, the surface which does not face the component constituting the hot water supply device, to the outside. Can be emitted toward In other words, in the heater mounting bracket of the present invention, heat generated from the surface of the heater not facing the heating target side, in other words, heat that is dissipated into the air is heated by the conventional mounting bracket described above. Heat can be transferred to the target. Thus, more heat generated from the supporting heater can be transferred to the object to be heated, so that efficient heat transfer can be performed between the heater and the object to be heated.

  The invention according to claim 2 has a latching piece portion projecting outward, and the engagement mounting portion is formed so as to be able to sandwich a part of the component member. In a state in which the engagement mounting portion sandwiches a part of the constituent member, the latching piece portion is prevented from rotating in a predetermined direction by contacting the other portion of the constituent member. The heater mounting bracket according to claim 1.

The heater mounting bracket of the present invention is formed so that the engagement mounting portion can sandwich a part of the constituent members constituting the hot water supply device, and the engagement mounting portion sandwiches a part of the structural members. By doing so, it becomes a structure which can be attached with respect to a structural member. Such a configuration is preferable because a locking force for the component member can be secured with a relatively simple structure without performing processing for attachment to the component member.
Here, many components constituting the hot water supply apparatus have a rounded outer shape such as a cylindrical pipe. Therefore, when this rounded portion is clamped by the engagement mounting portion and the heater mounting bracket is mounted on the component member, the heater mounting bracket clamps the component member due to the weight of the heater mounting bracket or the like. There is a risk that it will rotate.
In view of this, the heater mounting bracket of the present invention has a latching piece portion that protrudes outward, and in a state where a part of the component member is sandwiched, the latch piece portion is the other member of the component member. It is configured to prevent rotation in a predetermined direction by contacting the part.
According to such a configuration, the posture of the heater mounting bracket in a state of being attached to the component member can be stabilized without strongly sandwiching the component member as in the case of tightening and fixing. In other words, even a simple attachment that does not require a strong clamping force enables a highly stable attachment.
In addition, if the mounting posture of the heater mounting bracket is stabilized in this way, an accident caused by the heater mounting bracket being removed unexpectedly, for example, the wiring of the internal base of the water heater and the heater are intended. There is an advantage that it is possible to prevent accidents such as making contact that does not occur. Furthermore, when the posture at the time of mounting the heater mounting bracket is stabilized, the positions of the heater, the object to be heated, and the reflection plate portion are also stabilized without being changed. Therefore, the distance between the heater or the reflector plate and the object to be heated is not unexpectedly separated, and when the object to be heated is heated by the heater, the above-described heating operation with efficient heat transfer can be stably continued. .

  A third aspect of the present invention is the heater mounting bracket according to the first or second aspect, wherein the reflector plate covers at least one side of the heater when the heater is supported.

  Such a configuration is preferable because more heat can be reflected and radiated toward the component to be heated.

  The heater mounting bracket of the present invention may include a heat transfer plate portion that contacts the component member and the heater.

  In the present invention, the constituent member is a heat exchanger that performs heat exchange between the heating gas and hot water, and includes a can body through which the heating gas flows and a flowing water pipe through which the hot water flows, The can body includes a can body main body that has a frame shape or a cylindrical shape, and a flange portion that protrudes in the horizontal direction from the vicinity of each end in the vertical direction of the can body main body, and the water pipe extends in a meandering manner. Piping is provided in a single stage, a part is located inside the can body, and the other part is exposed to the outside of the can body, and the engagement mounting portions are formed at a plurality of locations, It is preferable that the tube is attached in contact with a plurality of portions exposed to the outside of the can body.

  Moreover, in such a structure, it has a latching piece part which protrudes outward, and in the state attached to the said water flow pipe, the said latching piece part contacts the said flange part, and is predetermined. It is further preferable that it can be attached so as to be prevented from rotating in the direction of (1).

  The heater mounting bracket of the present invention can be particularly preferably used when a heater is mounted on an external pipe of a heat exchanger in which meandering pipes are provided in a single stage.

  The invention according to claim 7 is characterized in that the holder part, the engagement mounting part, and the hooking piece part have elasticity. This is a heater mounting bracket.

According to such a configuration, when the heater is attached to and detached from the heater mounting bracket, when the heater mounting bracket is attached to and detached from the component member, when the latching piece portion is arranged at a predetermined position, etc. The holder part, the engagement attaching part, and the latching piece part can be temporarily elastically deformed to perform these attaching / detaching operations and arranging operations.
Here, in the case of the hot water supply apparatus, various devices and pipes are often built in almost no gap, and there may be a case where a wide space cannot be secured around the heater mounting portion. However, according to the heater mounting bracket of the present invention, a predetermined portion can be appropriately elastically deformed, so that mounting and dismounting and arranging operations of the heater mounting bracket and the heater can be performed relatively easily even in such a narrow space. can do.

  The invention according to claim 8 is the heater mounting according to any one of claims 1 to 7, wherein a wiring holding part for holding the wiring extended from the heater is integrally formed. Metal fittings.

  According to such a configuration, the wiring extending from the heater is not entangled and does not come into contact with the heat generation portion of the heater, which is desirable. Moreover, it is desirable because the number of parts of the entire hot water supply apparatus can be reduced as compared with a configuration in which a member for stopping the wiring extending from the heater is separately provided.

  In the present invention, the outer shape of the heater is preferably a substantially cylindrical shape.

  A tenth aspect of the present invention is a hot water supply apparatus comprising a structural member to which a heater is attached via the heater mounting bracket according to any one of the first to ninth aspects.

  The hot water supply apparatus of the present invention has a built-in component to which the heater is attached by the heater mounting bracket according to any one of claims 1 to 9, so that the component can be efficiently heated. For this reason, the freeze prevention operation can be performed efficiently.

The heater mounting bracket of the present invention can reflect the heat generated from the surface of the heater not facing the heating target side by the reflecting plate portion and radiate it toward the heating target. For this reason, more heat generated from the heater can be transferred to the object to be heated, so that there is an effect that efficient heat transfer between the heater and the object to be heated becomes possible.
In addition, the hot water supply apparatus of the present invention that incorporates the structural member to which the heater is mounted by such a heater mounting bracket can efficiently heat the structural member, so that it is possible to increase the efficiency of the freeze prevention operation. .

It is a block diagram which shows the hot-water supply apparatus which incorporates the primary heat exchanger which attached the heater with the heater attachment metal fitting which concerns on embodiment of this invention, and shows the state which permeate | transmitted the outer wall from the back side. It is a perspective view which shows the state which looked at the primary heat exchanger of FIG. 1 from the back side, and abbreviate | omits and shows a fin. It is explanatory drawing which shows the flow of the hot water in the primary heat exchanger of FIG. 2, and abbreviate | omits and shows a fin. It is a right view of the primary heat exchanger of FIG. 2, and abbreviate | omits and shows a water inlet pipe part, a water outlet pipe part, and a fin. It is a perspective view which shows the state which supported the heater with the bracket for heater attachment of FIG. It is a perspective view which shows the bracket for heater attachment of FIG. It is a perspective view which shows the state which looked at the bracket for heater attachment of FIG. 5 from the back side. It is a perspective view which shows the heater of FIG. FIG. 6 is an explanatory diagram showing a state in which the heater mounting bracket and the heater are engaged when the heater is supported by the heater mounting bracket of FIG. 5. It is AA sectional drawing which shows the bracket for heater attachment of FIG. 5, and a heater. It is explanatory drawing which shows a mode that a heater attachment metal fitting and a primary heat exchanger are engaged in the state which supported the heater with the heater attachment metal fitting of FIG. FIG. 6 is an explanatory diagram illustrating a state in which a lead wire extending from the heater is held by a wiring locking piece of the heater mounting bracket in a state where the heater is supported by the heater mounting bracket of FIG. 5. It is BB sectional drawing which shows the bend pipe | tube part of the heater of FIG. 12, a heater attachment metal fitting, and a primary heat exchanger.

  Hereinafter, although embodiment of this invention is described in detail, this invention is not limited to these examples. In the following description, the positional relationship between front, rear, up, down, left and right will be described based on a normal installation state unless otherwise specified.

  As shown in FIG. 1, the heater mounting bracket 1 of the present embodiment has a heater 7 (in FIG. 1) with respect to a primary heat exchanger 5 (heat exchanger) built in the housing 3 of the hot water supply device 2. (Not shown).

  The hot water supply device 2 is configured by incorporating various devices or components such as pipes inside a housing 3, and a combustion unit 4 and a blower (not shown) that supplies air to the combustion unit 4. And a so-called latent heat recovery type hot water supply device 2 that includes a primary heat exchanger 5 that mainly recovers sensible heat and a secondary heat exchanger 6 that mainly recovers latent heat as main components. .

  The combustion unit 4 includes a burner that burns fuel such as gas and kerosene, and generates high-temperature combustion gas by burning the fuel.

  The primary heat exchanger 5 is a gas / liquid heat exchanger, and as shown in FIG. 2, a can body 10, a flowing water pipe 11 extending inside and outside the can body 10, and fins (not shown). These are integrally formed by brazing or the like.

  The can body 10 includes a can body main body 12 having a substantially rectangular tube shape, an upper flange portion 13 (flange portion) projecting outward from the upper end of the can body main body 12, and an outer end from the upper end of the can body main body 12. It is the standing frame body provided with the lower flange part 14 (flange part) which protrudes toward.

  The can body 12 includes four standing wall portions 15 provided in a state where each can stand up and down is formed in an annular shape, and is an internal hollow portion formed by being surrounded by the four standing wall portions 15. Is in a state in which the upper end and the lower end are opened.

  The upper flange portion 13 includes a flange main body 13a that is a plate body having a substantially “B” shape in plan view, and a peripheral wall portion 13b that hangs downward from the outer peripheral edge of the flange main body 13a. In other words, the upper flange portion 13 has a shape in which the outer peripheral edge portion of the flange main body 13a is bent substantially vertically downward. The flange main body 13a is provided so as to surround the upper end opening portion of the can body main body 12, and protrudes along the horizontal direction from the vicinity of the upper end of the outer peripheral surface of the can body main body 12 to the outside.

  The lower flange portion 14 includes a flange main body 14a that is a plate body having a substantially “B” -shaped outer shape, and a peripheral wall portion 14b that is suspended upward from the outer peripheral edge of the flange main body 14a. In other words, the lower flange portion 14 has a shape in which the outer peripheral edge portion of the flange body 14a is bent substantially vertically upward. The flange main body 14a is provided so as to surround the lower end opening portion of the can body main body 12, and protrudes along the horizontal direction from the vicinity of the lower end of the outer peripheral surface of the can body main body 12 toward the outside.

  As shown in FIG. 2, the flowing water pipe 11 is a pipe extending meandering in the horizontal direction. More specifically, the flowing water pipe 11 is bent at the outside of the can body 10, the inlet pipe section 18 that is a pipe into which hot water flows, the straight pipe section 19 that extends in the front-rear direction inside the can body 10, and the outside. Thus, the bend pipe part 20 extending and the water discharge pipe part 21 which is a pipe through which hot water flows out are connected to each other.

  The straight tube portion 19 extends through a plurality of fins (not shown) located inside the can body 10. In addition, this fin (not shown) is a thin plate-like (rectangular flat plate-like) member that extends along the left-right direction of the can body 10 in an upright posture. That is, the straight tube portion 19 is in a state of penetrating a plurality of fins (not shown) in the thickness direction. Moreover, the straight pipe part 19 penetrates the standing wall part 15 of the can body 10 at both ends in the extending direction (front-rear direction), respectively, and the pipes (the water inlet pipe part 18 and the bend pipe part 20 located outside the can body 10) Any one of the water discharge pipe sections 21).

  The bend pipe portion 20 is a portion that is bent so as to have a substantially “U” shape in plan view. Here, as for the bend pipe part 20, the both ends of the extension direction are all adjoining to the standing wall part 15 of the can body 10, and each end part is in the state where it paralleled at intervals. Each end portion in the extending direction of the bend pipe portion 20 is continuous with a different straight pipe portion 19. Further, the bend pipe part 20 is in a state of projecting in the horizontal direction from the standing wall part 15 toward the outside, and a U-shaped apex part is a projecting end.

  Here, as shown in FIG. 3, the flowing water pipe 11 is provided with a plurality of straight pipe parts 19 and a plurality of bend pipe parts 20 between the water inlet pipe part 18 and the water outlet pipe part 21. These are connected and formed. Specifically, in the flowing water pipe 11, from the upstream side in the flowing direction of hot water, the inlet pipe part 18a, the first straight pipe part 19a, the first bend pipe part 20a, the second straight pipe part 19b, 2 The sixth bend pipe portion 20b, the sixth straight pipe portion 19f, the sixth bend pipe portion 20f, the seventh straight pipe portion 19g, and the water discharge pipe portion 21a are successively connected. Yes.

  For this reason, the hot water that has flowed in from the water inlet pipe portion 18 alternately passes through the straight pipe portion 19 located inside the can body 10 and the bend pipe portion 20 located outside the can body 10. It becomes. Specifically, the hot water that has passed through the straight pipe portion 19 (19a) inside the can body 10 once flows to the outside of the can body 10 and is folded back by the bend pipe portion 20 (20a). 10 flows into the interior. And it passes along the straight pipe part 19 (19b) in the position adjacent to the straight pipe part 19 (19a) which passed before the return | turnback. By repeating this, the hot water flows into the straight pipe portion 19 (19g) located on the most downstream side in the hot water flow direction. And hot water reaches from the straight pipe part 19 (19g) to the water discharge pipe part 21 (21a), and flows out from the water discharge pipe part 21 (21a).

  In other words, the plurality of straight pipe portions 19 are arranged in parallel in the left-right direction of the can 10, and each bend pipe portion 20 is connected to two straight pipe portions 19 adjacent in the left-right direction. Yes. The bend pipe part 20 is provided on each of the front side and the rear side of the can body 10, and the first straight pipe part 19a and the second straight pipe part 19b are located on the rear side. 20a is connected, and the second straight tube portion 19b and the third straight tube portion 19c are connected to the front bend tube portion 20b, and so on. In the tubular tube portion 19, the rear bend tube portions 20 (20a, 20c,...) And the front bend tube portions 20 (20b, 20d,...) Are alternately connected. Therefore, a plurality of bend pipe sections 20 are arranged in parallel in the left-right direction at the front side and the rear side of the can body 10.

  Further, as shown in FIG. 2, the straight pipe portion 19 and the plurality of bend pipe portions 20 located between the water inlet pipe portion 18 and the water outlet pipe portion 21 are substantially the same in the vertical height direction. It has become. That is, the flowing water pipe 11 is provided in a single stage (one stage) and is a pipe extending in a meandering manner in the horizontal direction.

  Here, in the primary heat exchanger 5, since the flowing water pipe 11 is provided in a single stage (one stage), the height is lower than that provided in a plurality of stages (the length in the vertical direction is short). It has become. For this reason, the height of the can body 10 that houses a part of the water flow pipe 11 therein is also relatively low, and the upper flange portion 13 and the lower flange portion 14 of the can body 10 are relatively close to each other. In position. Therefore, the bend pipe part 20 and the upper flange part 13 positioned between the upper flange part 13 and the lower flange part 14 or the bend pipe part 20 and the lower flange part 14 are both relatively close to each other. is there.

  Specifically, as shown in FIG. 4, in the vicinity of the rear end side of the primary heat exchanger 5, each of the upper flange portion 13 and the lower flange portion 14 protrudes from the can body body 12 toward the rear side. ing. The bend pipe portion 20 also protrudes from the can body main body 12 toward the rear side. Here, the bend pipe part 20 is between the upper flange part 13 and the lower flange part 14, and protrudes slightly from the position of the lower flange part 14 from the center in the vertical direction of the can body 12. Further, the protruding length of the upper flange portion 13 is longer than the protruding length of the bend tube portion 20, and the protruding length of the bend tube portion 20 is longer than the protruding length of the lower flange portion 14. Therefore, the upper flange portion 13 is provided so as to cover the bend pipe portion 20 at a position away from the bend pipe portion 20 like a ridge. In other words, the upper flange portion 13 is in a state of being put on the bend pipe portion 20 like an umbrella.

  Further, in the vicinity of the front end side of the primary heat exchanger 5, each of the upper flange portion 13 and the lower flange portion 14 protrudes from the can body main body 12 toward the front side. The bend pipe portion 20 also protrudes from the can body main body 12 toward the front side. The bend pipe portion 20 is located between the upper flange portion 13 and the lower flange portion 14 in the vicinity of the front end side of the primary heat exchanger 5 as well as the vicinity of the rear end side. The protruding length is increased in the order of the pipe part 20 and the upper flange part 13.

  The secondary heat exchanger 6 is a known gas / liquid heat exchanger, and is a part that recovers the thermal energy of the combustion gas that could not be recovered by the primary heat exchanger 5. This secondary heat exchanger 6 is formed by incorporating a pipe (not shown) through which hot water flows inside the box-like body, and stainless steel or the like having high corrosion resistance is adopted as a raw material of this pipe. By doing so, it has a structure superior in corrosion resistance as compared with the primary heat exchanger 5.

  As shown in FIG. 1, in the hot water supply device 2, the primary heat exchanger 5 is positioned downstream of the combustion unit 4 in the flow direction of the combustion gas, and further downstream of the primary heat exchanger 5 in the flow direction of the combustion gas. The secondary heat exchanger 6 is located in The primary heat exchanger 5 and the secondary heat exchanger 6 are connected in series. From the inside of the combustion section 4, a space communicating with the inside of the primary heat exchanger 5, the secondary heat exchanger 6, the exhaust collecting pipe 8, and the exhaust pipe (not shown) is formed, and is generated in the combustion section 4. Combustion gas can flow.

  Therefore, when the hot water supply device 2 is operated, the combustion gas generated in the combustion unit 4 flows through the primary heat exchanger 5, the secondary heat exchanger 6, and the exhaust collecting pipe 8, and reaches the exhaust pipe. And it discharge | releases outside from the exhaust port formed above the exhaust pipe. On the other hand, hot water supplied from an external water supply source or a circulating heat medium is preheated by the secondary heat exchanger 6 and then flows into the water pipe 11 of the primary heat exchanger 5. And the hot water and heat medium which flow through the flowing water pipe 11 are heat-exchanged with the combustion gas which flows through the inside of the primary heat exchanger 5 (can body 10), and are heated. By heating the hot water and heat medium in this way, a general hot water supply operation for supplying hot water to a hot water supply destination such as a currant or a bathtub, an automatic bathing operation for supplying hot water to the bathtub, and supplying heat to the heater Various operations such as a heating operation for heating the heat medium and a bath operation for heating by circulating hot water in the bath are possible.

  Here, as described above, when various operations are performed in the hot water supply device 2, the hot water and the heat medium flow through the water flow pipe 11 of the primary heat exchanger 5. Therefore, if the operation is stopped after various operations are performed by the hot water supply device 2, hot water or the like remains in the flowing water pipe 11. For this reason, when the hot water supply apparatus 2 is operated in a cold region, hot water or the like remaining in the flowing water pipe 11 may be cooled by the low temperature outside air and frozen. Therefore, in the present embodiment, in order to prevent such freezing of hot water or the like remaining inside the flowing water pipe 11, the heater 7 is attached to the flowing water pipe 11 via the heater mounting bracket 1 (FIG. 1, FIG. 1). 2, see FIG.

  The heater mounting bracket 1 of the present embodiment will be described in detail below.

  The heater mounting bracket 1 is a bracket formed by punching a metal plate material and then bending it. As shown in FIG. 5, the component of the water heater 2 to which the heater 7 is mounted (this embodiment) Then, the tube holding part 26 (engagement attaching part) for fixing the heater mounting bracket 1 itself to the bend pipe part 20) of the primary heat exchanger 5, the holder part 27 for supporting the heater 7, and the holder A reflection plate portion 28 located on one side of the upper portion and the side portion of the portion 27, and a latching piece portion 29 formed near the upper end of the heater mounting bracket 1 and projecting upward on the upper side.

  As shown in FIGS. 5 and 6, the tube clamping unit 26 is configured by two leg portions 32 and a heat transfer plate portion 33.

  As shown in FIGS. 6 and 7, the leg portions 32 are formed one by one at portions located slightly inside from the left and right ends of the heater mounting bracket 1. The leg portion 32 includes a substantially rectangular flat plate-shaped bottom plate portion 35 and a standing frame portion 36 that protrudes substantially vertically upward from the rear end of the bottom plate portion 35 and extends in the vertical direction, and has a side surface shape of substantially L. It is formed in a letter shape. Further, the leg portion 32 is formed so as to be elastically deformable.

  The bottom plate portion 35 projects forward from the lower end of the standing frame portion 36 and is supported in a cantilevered manner at the lower end portion of the standing frame portion 36. Here, in the vicinity of the front end of the bottom plate portion 35, a locking projection portion 37 formed by bending the bottom plate portion 35 so as to protrude upward is provided. That is, the locking projection 37 is a portion whose height in the vertical direction is higher than that of other portions located in the periphery, and is a projection protruding upward.

  The standing frame portion 36 includes a frame body 38 having a substantially “B” shape when viewed from the front, and a wiring locking piece 39 (which is formed so as to protrude upward from the lower end of the inner peripheral surface of the frame body 38. Wiring holding part). In other words, the standing frame portion 36 is formed by providing a through hole 40 penetrating the flat plate portion in the thickness direction (front-rear direction) with respect to the flat plate portion rising in the vertical direction. It is. And the through-hole 40 formed in the center part of the standing frame part 36 becomes the substantially "concave" character shape where the opening shape seen from the front turned upside down.

  The frame body 38 is a frame that is formed by hollowing out most of the center side with the upper and lower ends and the left and right ends of the flat plate-like portion standing up and down.

The wiring locking piece 39 is provided at the lower end portion of the inner peripheral surface of the frame main body 38 and in the vicinity of the center in the left-right direction, and is formed by bending a substantially rectangular flat plate portion standing up and down. It is a protruding piece.
Here, the portion in the vicinity of the center in the vertical direction of the wiring locking piece 39 is formed to be bent in a mountain shape so as to protrude rearward. And the part which became convex in this back is the state which protruded back from the rear-end surface of the frame main body 38. As shown in FIG. Further, the vicinity of the upper end of the wiring locking piece 39 is also bent so as to protrude toward the rear upper side. This portion is also in a state of protruding rearward from the rear end surface of the frame body 38.
That is, the wiring locking piece 39 is a portion formed by bending a rectangular flat plate standing up and down so that the side view has a sawtooth waveform, and protrudes backward located near the center in the vertical direction. And a flat plate portion inclined with respect to the front-rear direction of the upper end are continuously in the vertical direction.

  Further, the length of the wiring locking piece 39 in the left-right direction is shorter than the length of the adjacent through-hole 40 in the left-right direction. The wiring locking piece 39 is also formed so as to be elastically deformable.

Here, paying attention to the vicinity of the upper end of the frame main body 38, as shown in FIG. 7, a substantially rectangular flat plate-like shape is formed between the frame main body 38 and the side reflector 53 (described later in detail). A leg connecting plate 42 is provided.
The leg connecting plate 42 projects forward from the upper end of the frame body 38 and faces the bottom plate 35. In other words, the leg connecting plate 42 and the bottom plate portion 35 are spaced apart in the vertical direction so as to be parallel to each other. The protruding length (length in the front-rear direction) of the leg connecting plate 42 is shorter than the protruding length (length in the front-rear direction) of the bottom plate portion 35. Further, the front end portion of the leg connecting plate 42 and the lower end of the side reflecting plate portion 53 (described in detail later) are in a continuous state.
As a result, the rear end portion of the leg portion 32 is positioned behind the rear end portion of the side reflector portion 53 (described in detail later).

  As shown in FIG. 6, the heat transfer plate portion 33 is a rectangular flat plate portion that protrudes forward from the lower end of the side reflector plate portion 53 (described in detail later). The heat transfer plate portion 33 is located between the two leg portions 32, and extends from the vicinity of the inner end portion of one leg portion 32 to the vicinity of the inner end portion of the other leg portion 32. The heat transfer plate portion 33 is provided at substantially the same height as the upper end of the leg portion 32.

The holder part 27 is constituted by a heat transfer plate part 33 and two upper support pieces 45.
Here, as described above, the tube sandwiching portion 26 includes the two leg portions 32 and the heat transfer plate portion 33. That is, as shown in FIG. 6, the tube sandwiching portion 26 and the holder portion 27 are formed so as to be parallel in the vertical direction with the heat transfer plate portion 33 as a boundary. It is formed so as to be a part of the holding part 26 and also a part of the holder part 27. In other words, the heat transfer plate part 33 is a part for supporting the heater 7 and also a part for sandwiching the bend pipe part 20 of the primary heat exchanger 5.

As shown in FIGS. 6 and 7, the upper support piece 45 is formed by notching a part of the upper reflecting plate portion 54 (detailed later) and the side reflecting plate portion 53 (detailed later). Is formed. A portion where the upper support piece 45 is formed is located slightly inside the leg portion 32 in the left-right direction of the heater mounting bracket 1. More specifically, one of the two upper support pieces 45 is provided at a position slightly inside the one leg 32 of the two legs 32, and the other of the two legs 32. The other of the two upper support pieces 45 is provided at a position slightly inside the leg portion 32.
The upper support pieces 45 are both elastically deformable.

  The upper support piece 45 includes a curved portion 46 that is a rounded and curved plate so as to protrude upward, and a rectangular flat plate-like projecting claw portion 47 that projects from the front end of the curved portion 46 toward the upper front side. And provided above the heat transfer plate portion 33. Therefore, the lower surface of the curved portion 46 and the heat transfer plate portion 33 are in a state of facing each other.

Here, paying attention to the rear end portion of the curved portion 46, as shown in FIG. 7, the side view is substantially “L” between the curved portion 46 and the side reflector portion 53 (described in detail later). A support piece connecting plate 49 having a letter shape is provided.
The support piece connecting plate 49 includes a rectangular plate-like standing plate portion 49a erected in the vertical direction and a protruding plate portion 49b formed by bending the upper end of the standing plate portion 49a forward.
The upright plate portion 49a is formed at a lower end portion of a cutout portion 51 (described later in detail) of the side reflecting plate portion 53, and protrudes upward from the lower end portion.
The protruding plate portion 49b protrudes forward from the upper end of the standing plate portion 49a, and the front end portion thereof and the rear end portion of the bending portion 46 are in a continuous state.
Thus, by providing the support piece connecting plate 49, the upper support piece 45 and the side reflecting plate portion 53 (described later in detail) are in a state of being separated in the front-rear direction.

  The reflecting plate portion 28 is configured by a substantially rectangular flat plate-like side reflecting plate portion 53 standing up and down, and an upper reflecting plate portion 54 formed by bending the upper end of the side reflecting plate portion 53 forward. ing. The side reflecting plate portion 53 and the upper reflecting plate portion 54 intersect substantially perpendicularly, and the reflecting plate portion 28 has a substantially “L” shape in a side view.

As shown in FIG. 7, the side reflecting plate portion 53 is located above the leg portion 32, and the length of the side reflecting plate portion 53 in the vertical direction is the leg portion 32 (standing frame portion). 36) which is shorter than the vertical length. In other words, the side reflecting plate portion 53 is a standing wall-like portion formed at a position above the center of the heater mounting bracket 1 in the vertical direction, and extends over the entire horizontal direction of the heater mounting bracket 1. Exist.
Further, the side reflector 53 is provided at a portion that is slightly closer to the center than the legs 32 from the ends of the left and right sides of the side reflector 53 and that is located further to the center in the left-right direction than the legs 32. A notch 51 is formed by notching downward from the upper end.

  As shown in FIG. 7, the upper reflecting plate portion 54 is positioned at the upper end of the heater mounting bracket 1 excluding the latching piece portion 29, and includes four pieces arranged in parallel in the left-right direction of the heater mounting bracket 1. The first upper reflection plate 54a, the second upper reflection plate 54b, the third upper reflection plate 54c, and the fourth upper reflection plate 54d, which are small rectangular plate portions, are formed. That is, the upper reflecting plate portion 54 has a large substantially rectangular plate-shaped portion extending over the entire left and right direction of the heater mounting bracket 1 and has three cutouts (two side cutout portions 55 and a center side cutout portion described later). 56) and divided into four small rectangular plate portions.

More specifically, the upper reflecting plate portion 54 is located at a position slightly closer to the center than the legs 32 from the respective ends in the left-right direction of the heater mounting bracket 1, A side cutout portion 55 extending from the front end to the rear end of the upper reflecting plate portion 54 is formed. The rear end portion of the side cutout 55 is continuous with the upper end portion of the cutout 51 of the side reflector 53 described above.
Further, the upper reflecting plate portion 54 is formed with a center side cutout portion 56 constituted by two cutout grooves in the vicinity of the center in the left-right direction of the heater mounting bracket 1. The two cutout grooves constituting the center cutout portion 56 are cutouts adjacent to both left and right end portions of the latching piece portion 29 (details will be described later), from the front end of the upper reflecting plate portion 54. It extends to the rear end.

  Here, as shown in FIG. 6, of the first upper reflector 54a, the second upper reflector 54b, the third upper reflector 54c, and the fourth upper reflector 54d, the heater mounting bracket 1 in the left-right direction is shown. The first upper reflection plate 54a and the fourth upper reflection plate 54d located at both ends are in a state of being opposed to the bottom plate portion 35 of the leg portion 32 in the vertical direction. That is, the first upper reflection plate 54a and the fourth upper reflection plate 54d are parallel to the different bottom plate portions 35, respectively.

  Further, the second upper reflection plate 54b and the third upper reflection plate 54c, which are located on the center side in the left-right direction of the heater mounting bracket 1, are both in a state of being opposed to the heat transfer plate portion 33 in the vertical direction. Yes. More specifically, the protruding length (length in the front-rear direction) of the upper reflector 54 is substantially the same as the protruding length (front-rear direction) of the heat transfer plate 33, and the second upper reflector 54 b and the entire lower surface of the third upper reflecting plate 54 c are in a state of facing the upper surface of the heat transfer plate portion 33. The second upper reflection plate 54b and the third upper reflection plate 54c are both parallel to the heat transfer plate portion 33. For this reason, the second upper reflecting plate 54b, the side reflecting plate portion 53, and the heat transfer plate portion 33 are continuous so that the vertical cross-sectional shape is substantially “U” shape. Similarly, the third upper reflection plate 54c, the side reflection plate portion 53, and the heat transfer plate portion 33 are also continuous so that the vertical cross-sectional shape is substantially “U” shape.

  As shown in FIGS. 6 and 7, the latching piece portion 29 is formed by folding the free end of a substantially rectangular flat plate portion supported in a cantilever shape toward the upper rear side, and the upper reflection plate portion 54. Is a protruding piece that protrudes further upward from the portion where is located, and is elastically deformable. The hooking piece 29 has a substantially “U” shape when viewed from the side. The front end portion of the latching piece portion 29 is located slightly behind the front end of the upper reflecting plate portion 54.

  The latching piece portion 29 has a substantially rectangular flat plate-like horizontal plate portion 58 protruding forward from the upper end of the side reflecting plate portion 53 and a curved portion 59 that is rounded and curved so as to protrude forward. And a substantially rectangular flat plate-shaped retaining plate portion 60 that is inclined with respect to the horizontal direction so that the rear end side becomes higher.

The front end portion of the horizontal plate portion 58 is continuous with the lower end portion of the bending portion 59, and the upper end portion of the bending portion 59 is continuous with the lower end portion of the retaining plate portion 60. Therefore, the latch plate 60 is in a state protruding from the upper end of the curved portion 59 to the upper rear side.
Here, the horizontal plate portion 58 is in a state of being opposed to the heat transfer plate portion 33 in the vertical direction. For this reason, the horizontal plate portion 58, the side reflector plate portion 53, and the heat transfer plate portion 33 are continuous so that the vertical cross-sectional shape is substantially “U” shape. Further, the protruding length (length in the front-rear direction) of the horizontal plate portion 58 is slightly shorter than the protruding length (front-rear direction) of the heat transfer plate portion 33.

  Then, the attachment structure at the time of attaching the heater 7 to the flowing water pipe 11 of the primary heat exchanger 5 is demonstrated.

  First, the heater 7 attached to the flowing water pipe 11 by the heater mounting bracket 1 will be described in detail.

As shown in FIG. 8, the heater 7 attached to the flowing water pipe 11 is a so-called quartz glass pipe heater, and its outer shape is substantially cylindrical.
More specifically, the heater 7 has a cylindrical glass tube 64, a resistance wire 65, two cap portions 66 formed of silicone rubber or the like, and two lead wires 67 (wiring). doing.
The lead wire 67 is connected to both end portions of the resistance wire 65 in a state where the resistance wire 65 is disposed inside the glass tube 64. In addition, the open portions located at both ends of the glass tube 64 are closed by the cap portions 66, and the two lead wires 67 extend through the other cap portions 66 to the outside.

  Here, as shown in FIG. 8, the resistance wire 65 is located near the center of the glass tube 64 in the cross-sectional radial direction. Therefore, the outer surface of the resistance wire 65 and the inner peripheral surface of the glass tube 64 are in a separated state. In other words, the glass tube 64 surrounds the resistance wire 65 at a position away from the resistance wire 65 to the outside.

  Such a heater 7 is inserted into the holder portion 27 of the heater mounting bracket 1 as shown in FIG. Then, as shown in FIG. 5, the heater 7 is sandwiched and fixed between the two upper support pieces 45 and the heat transfer plate portion 33.

  Specifically, the heater 7 is inserted between the upper support piece 45 and the heat transfer plate 33 in a state where the upper support piece 45 is primarily elastically deformed by applying an upward force or the like. . Thereafter, the force applied to the upper support piece 45 is released. As a result, the upper support piece 45 is deformed so as to return to its original shape. Therefore, as shown in FIG. 10, the lower surface of the curved portion 46 that is a part of the upper support piece 45 is the glass tube 64 of the heater 7. It will be in the state which contacted the outer peripheral surface. That is, the curved portion 46 of the upper support piece 45 presses the outer peripheral surface of the glass tube 64 of the heater 7 from above, and the heater 7 is sandwiched between the upper support piece 45 and the heat transfer plate portion 33. As a result, the heater 7 is fixed to the heater mounting bracket 1. In other words, the heater 7 is supported by the heater mounting bracket 1.

Here, as described above, the support piece connecting plate 49 (projecting plate portion 49 b) is provided between the curved portion 46 and the side reflecting plate portion 53. Therefore, the heater 7 and the side reflecting plate portion 53 are separated from each other in the front-rear direction.
In addition, the upper end portion of the upper support piece 45 (curved portion 46) is located below the upper end of the upper reflecting plate portion 54. For this reason, the heater 7 and the upper reflecting plate part 54 are in a state of being separated in the vertical direction.
That is, the upper surface of the heater 7 and the lower surface of the upper support piece 45 (curved portion 46) are in a state of being opposed to each other in the vertical direction, so that the rear surface (outer surface) of the heater 7 and the side reflector 53 Is in a state of being opposed to and spaced apart from the front surface.

  This will be described in detail. When the heater 7 is supported by the heater mounting bracket 1, as shown in FIG. 5, most of the upper portion of the heater 7 is engaged with the upper reflector 54. It is in the state covered with the horizontal plate part 58 of the one part 29. More specifically, the upper reflecting plate portion 54 and the horizontal plate portion 58 are positioned above substantially all of the upper portion of the heater 7 except for the portion in contact with the upper support piece 45. ing. In other words, the upper reflection plate portion 54 and the horizontal plate portion 58 are located over the entire longitudinal direction (left-right direction) of the heater 7 at a position away from the upper surface of the heater 7. As a result, the upper reflection plate portion 54 and the horizontal plate portion 58 are in a state of covering the heater 7 like a bowl. In other words, the upper reflecting plate portion 54 and the horizontal plate portion 58 are put on the heater 7 like an umbrella.

Further, in the state where the heater 7 is supported by the heater mounting bracket 1, as shown in FIG. 5, the side reflector 53 is erected at a position away from the rear portion of the heater 7. Yes. The side reflector 53 extends along the longitudinal direction (left-right direction) of the heater 7,
The length in the left-right direction of the side reflecting plate portion 53 and the length in the longitudinal direction (left-right direction) of the heater 7 are substantially the same. More specifically, the length in the left-right direction of the side reflector 53 that is substantially the same as the length in the left-right direction of the entire heater mounting bracket 1, and the length in the left-right direction of the glass tube 64 that serves as a heat generating portion of the heater 7. Are almost identical. For this reason, the substantially entire surface of the rear portion of the heater 7 is in a state of facing the front surface of the side reflecting plate portion 53.

  Thus, in a state where the heater 7 is supported by the heater mounting bracket 1, the heater mounting bracket 1 is attached to the bend pipe portion 20 located on the rear side of the primary heat exchanger 5 as shown in FIGS. 11 and 12. Is in an engaged state.

  Specifically, as shown in FIG. 12, when the heater mounting bracket 1 is attached to the primary heat exchanger 5, the bend pipe parts 20 (bend pipe part 20a, bend pipe part 20c, bend pipe part 20e) arranged in parallel are arranged. Of these, the two leg portions 32 of the heater mounting bracket 1 are in contact with the two bend pipe portions 20 (bend pipe portion 20a and bend pipe portion 20e) which are one jump (every other). And In other words, two bend pipe sections 20 (bend pipe sections 20a, 20a, 20b) located at both ends among the three bend pipe sections 20 (bend pipe section 20a, bend pipe section 20c, bend pipe section 20e) arranged in parallel in the left-right direction. The two leg portions 32 of the heater mounting bracket 1 are brought into contact with the bend pipe portion 20e), respectively.

  More specifically, as shown in FIG. 12, each bend pipe part 20 (bend pipe part 20 a, bend pipe part 20 e) is a protruding end of each bend pipe part 20, that is, the outermost position among the bend pipe parts 20. It is assumed that the vicinity of the portion that becomes the apex of the bent portion (the U-shaped apex portion and the bent apex) and the leg portion 32 are in contact with each other.

That is, the protruding end of the bend pipe part 20 is positioned above the bottom plate part 35 in a state where the leg part 32 is primarily elastically deformed by applying a downward force or the like. And the force added to the leg part 32 after that is cancelled | released. As a result, the leg portion 32 is deformed so as to return to its original shape. Therefore, as shown in FIG. 13, the lower portion of the bend pipe portion 20 is located behind the locking projection portion 37 and the bottom plate. It will be in the state which contacted the upper surface of the part 35. FIG.
Further, in this state, as shown in FIG. 13, the heat transfer plate portion 33 comes into contact from the upper side of the bend pipe portion 20. That is, the heat transfer plate portion 33 is in contact with a portion separated in the left-right direction from the protruding end of the bend pipe portion 20 (a portion separated in the depth direction in FIG. 13). That is, the bend pipe part 20 is in contact with the bottom plate part 35 of the leg part 32 from the lower side of the part serving as the projecting end, and heat is transferred from the upper part of the part separated in the left-right direction from the part with which the bottom plate part 35 contacts. It will be in the state which the board part 33 contacted. In other words, the bend pipe part 20 is sandwiched between the bottom plate part 35 and the heat transfer plate part 33 in the vertical direction. In this way, by sandwiching the bend pipe portion 20 between the bottom plate portion 35 and the heat transfer plate portion 33, the heater mounting bracket 1 is fixed to the primary heat exchanger 5 as shown in FIG. It becomes a state.

  Here, as described above, the heat transfer plate portion 33 is located between the two leg portions 32, and from the vicinity of the inner end portion of the one leg portion 32 to the vicinity of the inner end portion of the other leg portion 32. (See FIG. 6). Therefore, in a state where the heater mounting bracket 1 is attached to the primary heat exchanger 5, the heat transfer plate portion 33 has three bend pipe parts 20 (bend pipe part 20a, bend pipe part 20c, bend pipe part 20e) arranged in parallel. ) From above (see FIG. 1).

Further, in the state where the heater mounting bracket 1 is attached to the primary heat exchanger 5, as shown in FIG. 13, the latching piece portion 29 contacts the upper flange portion 13 of the primary heat exchanger 5 from below. It will be in the state. More specifically, the upper end of the latching plate portion 60 that is a part of the latching piece portion 29 and protrudes rearward and upward is in contact with the lower surface of the flange body 13 a of the upper flange portion 13.
More specifically, the latching piece 29 is also in a state where it is positioned below the upper flange portion 13 in a state where it is primarily elastically deformed by applying a force downward or the like. The force applied to is released. Then, since the latching piece 29 is deformed to return to the original shape, the latching piece 29 is in a state of constantly urging the upper flange portion 13 upward.

Thus, when the latching piece portion 29 is in contact with the upper flange portion 13, unintentional rotation of the heater mounting bracket 1 can be prevented.
More specifically, assuming that the heater mounting bracket 1 is attached to the primary heat exchanger 5, the heater is mounted around the sandwiched bend pipe portion 20 due to an unexpected force applied to the heater mounting bracket 1. It is assumed that the metal fitting 1 tries to rotate so as to fall down toward the outside of the primary heat exchanger 5 (an attempt to rotate clockwise in FIG. 13). However, even if the heater mounting bracket 1 tries to rotate as described above, the heater mounting bracket 1 cannot rotate because the latching piece portion 29 is caught by the upper flange portion 13. Therefore, according to the heater mounting bracket 1 of the present embodiment, it is possible to completely prevent unintentional rotation that falls down to the outside (rear side) of the primary heat exchanger 5 of the heater mounting bracket 1.

Furthermore, in the state where the heater mounting bracket 1 that supports the heater 7 is attached to the primary heat exchanger 5, the lead wire 67 extending from the heater 7 is formed integrally with the leg portion 32 as shown in FIG. The state is held by the wiring locking piece 39. As a result, the lead wire 67 is extended at a predetermined position, so that the lead wire 67 extending from the heater 7 does not get entangled or twisted with other members built in the hot water supply device 2.
Specifically, as shown in FIG. 12, the lead wire 67 is positioned in front of a portion bent so as to protrude rearward of the wiring locking piece 39. And in the position which left | separated to the left-right direction of the wiring latching piece 39, it is set as the state which the lead wire 67 was located in the rear side of the rear-end surface of the frame main body 38, respectively. As a result, the lead wire 67 is sandwiched between the wiring locking piece 39 and the frame body 38 in the front-rear direction, and the lead wire 67 is held (clamped) by the leg portion 32. As a result, the lead wire 67 is in a state in which a portion near the lower end of the heater mounting bracket 1 extends linearly along the left-right direction (the longitudinal direction of the heater mounting bracket 1).
That is, in the heater mounting bracket 1 of the present embodiment, a portion for mounting the heater mounting bracket 1 itself to the bend pipe portion 20 and a portion for holding the lead wire 67 are integrally formed. The structure can prevent the wire 67 from being entangled or twisted.

  Then, as shown in FIG. 13, when the heater 7 is operated in a state where the heater mounting bracket 1 that supports the heater 7 is fixed to the primary heat exchanger 5, the heater 7 generates heat, whereby the primary heat exchanger. The five bend pipe sections 20 are heated.

  Here, as described above, most of the upper portion of the heater 7 is covered with the upper reflecting plate portion 54 and the horizontal plate portion 58 (not shown in FIG. 13) of the latching piece portion 29. A side reflector 53 is erected at a position away from the rear portion of the heater 7 in the rearward direction. As a result, the heat radiated in the direction away from the bend pipe section 20 (flow water pipe 11) can be reflected, so that hot water inside the bend pipe section 20 (flow water pipe 11) can be efficiently heated. Yes.

More specifically, heat generated from the lower side of the heater 7 is transferred to the bend pipe part 20 directly or via the heat transfer plate part 33, and is transferred to the hot water inside the bend pipe 20 (flow water pipe 11). Will be transmitted.
Further, the heat generated from the upper side of the bend pipe portion 20 is radiated toward the upper reflecting plate portion 54 or the horizontal plate portion 58 (not shown in FIG. 13), and then the upper reflecting plate portion 54 or the horizontal plate portion. It is reflected by 58 (not shown in FIG. 13) and radiated toward the bend pipe section 20 side. Thereby, the reflected heat is transferred to the bend pipe part 20 directly or via the heat transfer plate part 33, and is transmitted to the hot water inside the bend pipe 20 (flow water pipe 11).
In addition, after the heat emitted from the rear side of the bend pipe portion 20, that is, the heat emitted toward the outside of the primary heat exchanger 5 is radiated toward the side reflector 53, the side reflector is obtained. The light is reflected by the portion 53 and radiated in a direction approaching the can body 12 of the primary heat exchanger 5. As a result, the reflected heat is transferred from the can body 12 to the flowing water pipe 11 and transferred to the hot water in the flowing water pipe 11.
In the present embodiment, since the heat radiated in the direction away from the bend pipe portion 20 can be used for heating the hot water in the flowing water pipe 11, the hot water in the flowing water pipe 11 can be efficiently heated. ing.

In the above-described embodiment, the reflecting plate (upper reflecting plate portion 54, side reflecting plate portion) is separated into a position spaced upward from the heater 7 and a position spaced rearward from the heater 7 (outward direction of the primary heat exchanger 5). 53), that is, an example in which the reflecting plate is provided at positions separated from each other in two directions with respect to the heater 7, the present invention is not limited to this.
For example, the reflector may be provided only at one of a position spaced upward from the heater and a position spaced rearward from the heater. That is, the reflector may be provided at a position separated in one direction with respect to the heater, or the reflector may be provided at a position separated in a plurality of directions.
However, from the viewpoint of facilitating attachment / detachment of the heater to / from the heater mounting bracket, a configuration in which no reflector is provided in either direction is desirable. That is, it is desirable to arrange the reflecting plate at a position that does not hinder the attachment / detachment of the heater.
Moreover, the structure which covered the outer peripheral surface of the heater from several directions by one reflecting plate by providing the reflecting plate curved in circular arc shape etc. may be sufficient.

  In the above-described embodiment, an example in which the heater mounting bracket 1 is engaged with the primary heat exchanger 5 while the heater 7 is supported, that is, an example in which the heater 7 is attached to the primary heat exchanger 5 is shown. The constituent member of the hot water supply apparatus for attaching the heater 7 with the heater mounting bracket 1 of the present invention is not limited to the primary heat exchanger. For example, it may be attached to other equipment such as a secondary heat exchanger, or an appropriate member such as a water inlet pipe for supplying hot water from an external water supply source to the inside of the hot water supply apparatus, piping for connecting each equipment, etc. You may attach to.

  In the above-described embodiment, an example in which the heater mounting bracket 1 is attached by sandwiching the pipe (bend pipe portion 20) between the leg portion 32 and the heat transfer plate portion 33 constituting the tube sandwiching portion 26 (engagement attachment portion). However, the structure for fixing the heater mounting bracket 1 of the present invention to the constituent members of the hot water supply apparatus is not limited to this. For example, the engagement mounting portion may be formed like a C-shaped clip in side view.

  In the above-described embodiment, an example in which the heat transfer plate portion 33 is formed so as to be a part of the tube sandwiching portion 26 (engagement attachment portion) and a part of the holder portion 27 has been described. The heater mounting bracket 1 is not limited to this. The heat transfer plate portion may be a part of either the engagement mounting portion or the holder portion. Moreover, the structure which provides a heat-transfer board part separately from an engagement attachment part and a holder part may be sufficient.

1 Heater mounting bracket 2 Water heater 5 Primary heat exchanger (heat exchanger)
7 Heater 10 Can body 11 Flowing water pipe 12 Can body body 13 Upper flange part (flange part)
14 Lower flange (flange)
26 Tube clamping part (engagement attachment part)
27 Holder portion 28 Reflecting plate portion 29 Hanging piece portion 33 Heat transfer plate portion 39 Wiring locking piece (wiring holding portion)

Claims (10)

It is a heater mounting bracket for mounting a heater to the constituent members constituting the hot water supply device,
A heater mounting bracket that includes a holder portion capable of supporting the heater and an engagement mounting portion for mounting the holder portion on the component member, and is capable of supporting the heater in a state of being attached to the component member. And
Having a reflector for reflecting radiant heat emitted from the heater;
The heater mounting bracket, wherein the heater and the reflection plate are separated in a state where the heater is supported by the holder. Having a latching piece projecting outward,
The engagement mounting portion is formed so as to be able to sandwich a part of the component member,
In a state in which the engagement mounting portion sandwiches a part of the constituent member, the latching piece portion is prevented from rotating in a predetermined direction by contacting the other portion of the constituent member. The heater mounting bracket according to claim 1.   3. The heater mounting bracket according to claim 1, wherein the reflector plate covers at least one side of the heater when the heater is supported. 4.   The heater mounting bracket according to any one of claims 1 to 3, further comprising a heat transfer plate portion in contact with the component member and the heater. The component member is a heat exchanger that performs heat exchange between a heating gas and hot water,
It has a can body through which heating gas flows and a flowing water pipe through which hot water flows,
The can body includes a can body main body that is frame-shaped or cylindrical, and a flange portion that protrudes in the horizontal direction from the vicinity of each end in the vertical direction of the can body main body,
The flowing water pipe is provided in a single stage with a meanderingly extending pipe, a part of which is located inside the can body, and the other part is exposed to the outside of the can body,
5. The engagement attachment portion is formed at a plurality of locations, and is attached in contact with a plurality of locations exposed to the outside of the can body of the flowing water pipe. The heater mounting bracket described in the above. It has a latching piece that protrudes outward,
6. The mounting according to claim 5, wherein in the state of being attached to the water flow pipe, the hooking piece can be attached so as to be prevented from rotating in a predetermined direction by contacting the flange. The heater mounting bracket described.   The heater mounting bracket according to any one of claims 2 to 6, wherein the holder portion, the engagement mounting portion, and the hooking piece portion have elasticity.   The heater mounting bracket according to any one of claims 1 to 7, wherein a wiring holding portion for holding a wiring extended from the heater is integrally formed.   The heater mounting bracket according to any one of claims 1 to 8, wherein an outer shape of the heater is a substantially cylindrical shape.   A hot water supply apparatus comprising a structural member to which a heater is attached via the heater mounting bracket according to any one of claims 1 to 9.

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