JP6237115B2 - Heat source machine - Google Patents

Description

  The present invention relates to a heat source machine, and more particularly to a heat source machine capable of recovering the latent heat of combustion gas.

  As an example of a heat source device, in order to improve thermal efficiency, a heat exchanger that has a heat exchanger that recovers sensible heat and latent heat of combustion exhaust gas (latent heat held by water vapor in the combustion exhaust gas) has been put into practical use. . When this heat exchanger capable of recovering latent heat is used, the water vapor in the combustion exhaust gas is condensed and condensed due to the removal of latent heat, so a large amount of drain (condensation water) is generated in the heat exchanger. Since the combustion exhaust gas contains nitrogen oxides, etc., it dissolves in the drain and the drain becomes acidic. A neutralizing agent is used to neutralize this acidic drain. A neutralizing device filled with this neutralizing agent is described in, for example, Japanese Patent Laid-Open No. 2013-71114 (Patent Document 1).

  Further, in a heat source device such as a water heater that uses fuel gas as a heat source, an igniter (ignition transformer) is generally used as an ignition source for igniting an air-fuel mixture of fuel gas and air. A spark plug is connected to the igniter via a conducting wire. The spark plug is connected to a burner that burns fuel gas.

JP 2013-71114 A

  In the above heat source machine, there is a problem that the voltage of the conductive line leaks to the burner when the conductive line comes into contact with the casing of the burner.

  This invention is made | formed in view of said subject, The objective is to provide the heat-source equipment which can suppress that the voltage of an energization line leaks to a burner.

  The heat source apparatus of the present invention can recover the latent heat of the combustion gas. The heat source machine includes a burner, a heat exchanger, a storage member, and a power line. The burner is for supplying combustion gas. The heat exchanger is for recovering the latent heat of the combustion gas supplied by the burner. The storage member is formed of a material having electrical insulating properties, and is for storing drainage generated by recovering the latent heat of the combustion gas with a heat exchanger. The energization line can energize electricity. The storage member has a portion disposed so as to cover the burner, and the portion is located between the burner and the conducting wire.

  According to the heat source apparatus of the present invention, the storage member formed of a material having electrical insulation has a portion arranged so as to cover the burner. Since this portion is located between the burner and the conducting wire, the insulation between the burner and the conducting wire is ensured by this portion. Thereby, it can suppress that the voltage of an energization line leaks to a burner.

  In said heat source machine, the storage member contains the support part which can support an electricity wire. Thereby, the storage member can support an energization line in a support part.

  In said heat source machine, the support part is provided in the outer wall of the storage member, and is comprised so that an energization line can be latched. Thereby, at the time of a maintenance, it becomes easy to operate | work so that an electricity supply line and a storage member do not interfere mutually.

  In the above heat source machine, the support portion is a groove formed in the outer wall of the storage member. For this reason, an energization line can be fixed to a groove.

  In the heat source device, at least one of one end and the other end in the extending direction of the groove is open. For this reason, it becomes easy to attach and detach the conducting wire to the groove.

  In the above heat source machine, the groove has a bottom portion, first and second side portions connected to both ends of the bottom portion in the width direction of the groove, and each bottom portion of the first and second side portions. And a retaining member provided on at least one of the end portions located on the opposite side. The support portion is configured to fix the energization wire by sandwiching the energization wire between the retaining member and the bottom portion. For this reason, it is possible to make it difficult to drop the conductive wire from the groove by the retaining member.

  The heat source device further includes an ignition nozzle for igniting the burner, and a high voltage generating member for applying a voltage to the ignition nozzle to ignite the ignition nozzle. The energization line is a high-voltage cord that electrically connects the ignition nozzle and the high-voltage generating member. For this reason, it can suppress that the voltage of the high voltage cord to which the high voltage was applied from the high voltage generation member leaks.

  As described above, according to the present invention, it is possible to suppress the leakage of the voltage of the conducting wire to the burner.

It is an operation principle figure showing roughly composition of a heat source machine in one embodiment of the present invention. It is a perspective view which shows roughly the external appearance of the heat-source equipment in one embodiment of this invention. It is a front view which shows roughly the internal structure of the heat-source equipment in one embodiment of this invention. It is an enlarged view of the P1 part of FIG. It is a front view which shows roughly the structure of the storage member in one embodiment of this invention. It is a side view which shows roughly the structure of the storage member in one embodiment of this invention. It is a side view which expands and shows the P2 part of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the structure of the heat source machine of one embodiment of the present invention will be described.

  With reference to FIG. 1, the schematic structure of the heat source machine (hot-water heater) 1 of this Embodiment is demonstrated. The heat source unit 1 of the present embodiment has two independent combustion systems, specifically, a hot water supply side combustion system on the right side, a bath / heating side combustion system on the left side, and a control device that controls operations related to combustion. 2

  In the hot water supply side combustion system, a hot water supply side combustion unit 7 that burns fuel to generate combustion gas, a known blower 9 that blows combustion air to the hot water supply side combustion unit 7, and hot water or a heat medium are circulated. The hot water supply side heat exchange unit 11 heated by the combustion gas and the hot water running water system 20 are provided. Similarly, the bath / heating side combustion system includes a bath / heating side combustion unit 8 and the bath / heating side combustion unit. 8 is provided with a blower 9 for blowing air, a bath / heating-side heat exchanging unit 12, a heating running water system 21, and a reheating running water system 22. The heat source machine 1 has a drain discharge system 13 that receives drains from both the bath / heating combustion system and the hot water supply combustion system.

  Each combustion unit 7, 8 is provided with a plurality of burners 40 for burning fuel gas, and a fuel pipe 41 for connecting the fuel gas to the burner 40 is connected. The fuel pipe 41 is provided with an original gas solenoid valve (fuel valve) 42, a proportional valve (fuel valve) 43 and a solenoid valve (fuel valve) 44 that regulate the flow of fuel gas to each burner 40. ing. That is, in each of the combustion sections 7 and 8, the opening and closing of the fuel valves 42, 43 and 44 are controlled, and the fuel gas supplied through the fuel pipe 41 is burned by the burner 40 to generate combustion gas. The

  The hot water supply water system 20 is partly formed by the hot water supply side heat exchange unit 11, and the hot water supplied from the water supply source flows to the hot water supply side heat exchange unit 11, and the hot water supply side heat exchange unit 11 performs a curan or the like. And a hot water supply side bypass flow path 25 that bypasses the hot water supply side heat exchange section 11. In the hot water supply water system 20, the hot water supply side bypass flow rate adjustment valve (liquid valve) 26 that adjusts the flow rate passing through the hot water supply side bypass passage 25, or the hot water flow rate is reduced when the hot water temperature is lower than a predetermined value. A hot water flow rate adjusting valve (liquid valve) 27 and the like are provided.

  Further, the hot water supply water system 20 is provided with a bath dropping channel 28 branched from the hot water flow channel adjusting valve 27 and leading the hot water to the bath tub. The bath dropping flow path 28 is provided with a pouring electromagnetic valve (liquid valve) 30 for restricting the water flow to the bathtub, a backflow prevention mechanism 31 for preventing the backflow of the water flow from the bathtub side, and the like. .

  The hot water supply side heat exchanger 11 includes a primary heat exchanger 11a that mainly recovers sensible heat of the combustion gas, and a secondary heat exchanger 11b (heat exchanger HE) that mainly recovers latent heat of the combustion gas. It is configured.

  The heating / flowing water system (terminal circulation path) 21 is formed by the bath / heating-side heat exchange unit 12, and hot water is a high-temperature side terminal such as the bath / heating-side heat exchange unit 12 and a bathroom heater. A high-temperature terminal path that circulates between (not shown), a low-temperature terminal path that circulates between the bath / heating-side heat exchange unit 12 and a low-temperature side terminal (not shown) such as floor heating, and a high-temperature terminal path The heating side bypass flow path connecting the low temperature terminal path and the bath heating path for heating the hot water flowing through the reheating water system 22 are circulated.

  And in the heating running water system 21, the heating side pump 36 which forms the circulating flow of hot water, the expansion tank 37 which suppresses the pressure rise accompanying the expansion of the volume resulting from the temperature change of hot water, or the pressure drop accompanying shrinkage, A heating-side bypass thermal valve (liquid valve) 39 provided on the heating-side bypass flow path, a bath-side thermal valve (liquid valve) 45 that regulates water flow to the bath heating path, and a reheating water system A liquid / liquid heat exchanger 46 that performs heat exchange with the hot and cold water flowing through 22 is provided.

  The bath / heating-side heat exchange unit 12 includes a primary heat exchanger 12a that mainly collects sensible heat of the combustion gas, and a secondary heat exchanger 12b (heat exchanger HE) that mainly collects latent heat of the combustion gas. It consists of and.

  In the reheating water system 22, the liquid / liquid heat exchanger 46 forms a part thereof, and hot water in the bathtub is provided between the liquid / liquid heat exchanger 46 and a bath tub (not shown). A circulation channel 47 that circulates is provided. The reheating channel 47 is provided with a retreating side pump 48 that forms a circulating flow of hot water. Note that the above-described bath dropping channel 28 is connected to the reheating channel 47.

  The drain discharge system 13 is a flow path that drains the drain generated when recovering the latent heat of the combustion gas with a neutralizer (storage member) 14 and then drains it to the outside. That is, as shown in FIG. 5, the drain discharge system 13 includes a neutralizer introduction flow path 15, a neutralizer 14, and a neutralizer 14 from the secondary heat exchangers 11 b and 12 b to the neutralizer 14. It is comprised with the external discharge flow path 16 of the downstream side.

Then, the specific structure of the heat source machine (hot-water heater) 1 of this Embodiment is demonstrated.
Referring to FIG. 2, the heat source device 1 includes a housing HP having a front surface FS, an upper surface US, a lower surface (bottom surface) LS, a side surface SS, and a rear surface (back surface) (not shown). The front surface FS is provided with an exhaust port EP for exhausting combustion gas. The heat source machine 1 has a substantially rectangular parallelepiped shape, and is formed so that the dimension in the width (left and right) direction (X direction in the figure) is smaller than the dimension in the height (up and down) direction (arrow Y direction in the figure). The size in the depth (front and rear) direction (Z direction in the figure) is smaller than the dimension in the width (left and right) direction (X direction in the figure).

  Referring to FIG. 3, the heat source device 1 is a latent heat recovery type heat source device capable of recovering the latent heat of the combustion gas. A hot water supply side heat exchange unit 11 and a bath / heating side heat exchange unit 12 are disposed above the burner 40 for supplying combustion gas. Specifically, a primary heat exchanger 11a for recovering sensible heat of the combustion gas supplied by the burner 40 and a primary heat exchanger 12a for the bath / heating-side heat exchange unit 12 are provided above the burner 40. Has been placed. Furthermore, above each primary heat exchanger 11a, 11b, a secondary heat exchanger 11b (heat exchanger HE) of the hot water supply side heat exchanger 11 for recovering the latent heat of the combustion gas supplied by the burner 40, The secondary heat exchanger 12b (heat exchanger HE) of the bath / heating-side heat exchange unit 12 is disposed.

  The burner 40 has a facing surface DP that faces the front surface FS of the housing HP. The neutralizer 14 is disposed in a substantially L shape on the front surface FS side of the housing HP from the opposing surface DP and on the lower surface (bottom surface) LS side of the burner 40. The neutralizer 14 is for storing the drain generated by collecting the latent heat of the combustion gas in each of the secondary heat exchangers 11b and 12b. The neutralizer 14 is filled with a neutralizing agent, and the neutralizing agent can neutralize the drain. The neutralizer 14 is made of a material having electrical insulation. As a material for the neutralizer 14, for example, polypropylene can be used.

  Referring to FIGS. 3 and 4, neutralizer 14 has a portion arranged to cover burner 40. This portion is disposed at a position where the nozzle of the burner 40 is disposed on the lower side of the burner 40. For this reason, the neutralizer 14 is arranged avoiding the high temperature portion on the upper side of the burner 40. The part arrange | positioned so that the burner 40 of the neutralizer 14 may be covered is located between the burner 40 and the electricity supply line 50 which can supply electricity. That is, the burner 40 and the conducting wire 50 sandwich at least a part of the neutralizer 14.

  The neutralizer 14 has a support portion SP that can support the conductive wire 50. The support portion SP is provided on the outer wall OP of the neutralizer 14 and is configured to be able to lock the energizing wire 50. In the present embodiment, the support portion SP is a groove TP formed in the outer wall OP of the neutralizer 14.

  An ignition nozzle 51 for igniting the burner 40 is connected to the facing surface DP of the burner 40. Further, a high voltage generating member 52 for applying a voltage to the ignition nozzle 51 to ignite the ignition nozzle 51 is disposed on the side surface of the burner 40. For example, an igniter can be used as the high voltage generating member 52. The energization line 50 is a high voltage cord that electrically connects the ignition nozzle 51 and the high voltage generating member 52.

  5 and 6, the neutralizer 14 has a horizontally long portion 14a and a vertically long portion 14b. When viewed from the front surface FS side of the housing HP, the horizontally long portion 14a and the vertically long portion 14b are connected so as to have a substantially L shape. When viewed from the side surface SS side of the housing HP, the horizontally long portion 14a and the vertically long portion 14b are arranged so as to be shifted in the depth (front-rear) direction. When viewed from the front surface FS of the housing HP, the horizontally long portion 14a is formed in a horizontally long shape, and the vertically long portion 14b is formed in a vertically long shape. That is, mainly referring to FIG. 3 and FIG. 5, the horizontally long portion 14 a has a portion located in a region overlapping with the opposing surface DP of the burner 40 when viewed from the front surface FS side of the housing HP, and the horizontal direction It extends to. The horizontally long portion 14 a is disposed along the facing surface DP so as to face the facing surface DP of the burner 40. Further, in the depth (front-rear) direction of the heat source device 1, the horizontally long portion 14a is disposed between the facing surface DP of the burner 40 and the front surface FS of the housing HP. Further, the vertically long portion 14b extends downward from one end side of the horizontally long portion 14a when viewed from the front surface FS side of the housing HP.

  Moreover, as shown by the arrow in the figure, the neutralizer 14 is configured such that drain enters from the upper end UE, and is discharged from the lower end LE through the horizontally long portion 14a and the vertically long portion 14b. The horizontally long portion 14a is configured to have a drain draft surface L1, and the vertically long portion 14b is configured to have a drain draft surface L2. Further, the vertically long portion 14b has a first passage H1 extending downward from the horizontally long portion 14a and a second passage H2 extending upward from the first passage H1. The first passage H1 and the second passage H2 constitute a water seal structure WS. The vertically long portion 14b has a first connection port C1 connectable to the bath circuit and a second connection port C2 connectable to the heating circuit.

  Further, a drainage member 60 capable of circulating drain and a drain plug 61 of the neutralizer 14 are attached in the vicinity of the lower end LE of the neutralizer 14. A controller fixing bracket 62 is attached to the center of the horizontally long portion 14a. Near the upper end UE of the neutralizer 14, neutralizer electrodes 63 and 64 for detecting the drain capacity are attached. Further, a neutralizer cap 65 and a packing 66 capable of sealing the inlet of the neutralizer are attached to the horizontally long portion 14a.

  The shape of the groove TP will be described in more detail with reference to FIG. The groove TP is open at both ends in the extending direction. The groove TP only needs to open at least one of one end and the other end in the extending direction. The groove TP is formed continuously from one end to the other end in the extending direction. In the present embodiment, the groove TP includes a bottom BP, first and second side surfaces S1, S2, and a retaining member PP.

  The first and second side surface portions S1 and S2 are respectively connected to both ends of the bottom portion BP in the width direction of the groove TP. The retaining member PP is provided at the end located on the opposite side of the bottom BP of each of the first and second side surfaces S1, S2. Specifically, the retaining member PP is formed so as to protrude from the first and second side surface portions S1 and S2. Note that the retaining member PP may be provided on at least one of the end portions located on the opposite sides of the bottom portions BP of the first and second side surface portions S1 and S2. And the support part SP is comprised so that the energization line 50 may be inserted | pinched between the retaining member PP and the bottom part BP, and the energization line 50 may be fixed.

Subsequently, a basic operation of the heat source apparatus 1 of the present embodiment will be described.
The basic operation of the heat source device 1 includes a hot water supply operation, a heating operation, a bath drop-in operation, and a chasing operation, all of which are the same as known ones.

  In the hot water supply operation, if a calorie or the like is operated and there is a hot water discharge request, the hot water supply side heat exchange unit 11 is heated by the combustion gas generated in the hot water supply side combustion unit 7 and hot water at a desired temperature is discharged from the curan or the like. The Heating operation is based on the high temperature heating operation that circulates hot water in the bathroom heating of the bath (high temperature side terminal) and the temperature of the low temperature hot water (hot water that circulates in the high temperature side terminal). There is also a low-temperature heating operation that circulates low temperature). That is, in the high-temperature heating operation, the bath / heating-side heat exchange unit 12 is heated by the combustion gas generated in the bath / heating-side combustion unit 8, and high-temperature hot water is circulated to the high-temperature side terminal via the high-temperature terminal path. In the low-temperature heating operation, the bath / heating-side heat exchange unit 12 is heated by the combustion gas generated in the bath / heating-side combustion unit 8, and low-temperature hot water is circulated to the low-temperature side terminal via the low-temperature terminal path. .

  In the reheating operation, if the temperature of the hot water in the bathtub is lower than a predetermined temperature or if there is a request for reheating operation by a remote controller or the like, the hot water in the bathtub is set to the set temperature via the liquid / liquid heat exchanger 46. Heat until. More specifically, in the reheating operation of the present embodiment, the bath / heating-side heat exchange unit 12 is heated by the combustion gas generated in the bath / heating-side combustion unit 8, and the heat flows through the heating / running water system 21. Indirectly, the water is transmitted to the reheating channel 47 to heat the hot water in the bathtub. The bath drop-in operation is different only in the method of requesting hot water (request through a remote controller or the like), and an operation substantially similar to the hot water supply operation is performed, and thus description thereof is omitted.

Next, the effect of the heat source machine of this Embodiment is demonstrated.
According to the heat source device 1 of the present embodiment, the neutralizer 14 formed of a material having electrical insulation has a portion arranged so as to cover the burner 40. Since this portion is located between the burner 40 and the conducting wire 50, the insulation between the burner 40 and the conducting wire 50 is secured by this portion. Thereby, it is possible to prevent the voltage of the conducting wire 50 from leaking to the burner 40. Moreover, since this part is located between the burner 40 and the energization line 50, it can prevent that the energization line 50 contacts the burner 40 and the covering of the energization line 50 is melted. Furthermore, it is possible to suppress the energization line 50 from approaching the burner 40 and picking up spark noise.

  In the heat source device 1 of the present embodiment, the neutralizer 14 has a support portion SP that can support the energization wire 50. Thereby, the neutralizer 14 can support the conducting wire 50 on the support part SP.

  In the heat source apparatus 1 of the present embodiment, the support portion SP is provided on the outer wall of the neutralizer 14 and is configured to be able to lock the energization line 50. Thereby, at the time of a maintenance, it becomes easy to carry out the operation | work which the electric wire 50 and the neutralizer 14 do not interfere mutually.

  In the heat source device 1 of the present embodiment, the support portion SP is a groove TP formed on the outer wall of the neutralizer 14. For this reason, the conducting wire 50 can be fixed to the groove TP. Moreover, since the conducting wire 50 can be covered with the groove TP, leakage of the voltage of the conducting wire 50 can be effectively suppressed.

  In the heat source device 1 of the present embodiment, the groove TP is open at least one of the one end and the other end in the extending direction. For this reason, it becomes easy to attach and detach the conductive wire 50 to the groove TP.

  In the heat source apparatus 1 of the present embodiment, the support portion SP is configured to fix the conduction wire 50 by sandwiching the conduction wire 50 between the retaining member PP and the bottom portion BP. For this reason, it is possible to make it difficult to drop the conductive wire 50 from the groove TP by the retaining member PP.

  In the heat source device 1 of the present embodiment, the energization line 50 is a high-voltage cord that electrically connects the ignition nozzle 51 and the high-voltage generating member 52. For this reason, it can suppress that the voltage of the high voltage cord to which the high voltage was applied from the high voltage generation member 52 leaks.

  In addition, although the case where the storage member was the neutralizer 14 was demonstrated above, it is not limited to this, A drain tank may be sufficient. Moreover, although the above demonstrated the case where the electricity supply line 50 was a high voltage | pressure cord, it is not limited to this, The electricity supply line 50 does not need to apply a high voltage | pressure. Furthermore, although the case where the support part SP is the groove | channel TP was demonstrated above, it is not limited to this, You may be formed by the weir which the conduction wire 50 cannot get over, and it is formed like a clip. Also good.

  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 Heat source machine, 2 Control apparatus, 7 Hot water supply side combustion part, 8 Heating side combustion part, 9 Blower, 11 Hot water supply side heat exchange part, 11a, 12a Primary heat exchanger, 11b, 12b Secondary heat exchanger, 12 Heating side Heat exchanger, 13 Drain discharge system, 14 Neutralizer, 14a Horizontal section, 14b Vertical section, 15 Neutralizer introduction flow path, 16 External discharge flow path, 20 Hot water flow system, 21 Heating flow system, 22 System, 23 Hot water supply main flow path, 25 Hot water supply side bypass flow path, 27 Hot water flow path adjustment valve, 28 Bath drop-in flow path, 36 Heating side pump, 37 Expansion tank, 40 Burner, 41 Fuel piping, 42 Fuel valve, 46 Liquid・ Liquid heat exchanger, 47 reheating channel, 50 conducting wire, 51 ignition nozzle, 52 high voltage generating member, 60 drainage member, 61 drainage plug, 63, 64 neutralizer electrode, 65 neutralizer Cap, 66 packing, BP bottom, C1 first connection port, C2 second connection port, DP facing surface, EP exhaust port, FS front surface, H1 first passage, H2 second passage, HE heat exchanger, HP housing, L1, L2 draft surface, LE lower end, OP outer wall, PP stop member, S1 first side surface portion, S2 second side surface portion, SP support portion, SS side surface, TP groove, UE upper end, US upper surface, WS Water seal structure.

Claims (7)

A heat source machine capable of recovering the latent heat of combustion gas,
A burner for supplying the combustion gas;
A heat exchanger for recovering the latent heat of the combustion gas supplied by the burner;
A storage member that is formed of a material having electrical insulation and that stores drain generated by collecting latent heat of the combustion gas in the heat exchanger;
With a conducting wire capable of conducting electricity,
The storage member has a portion arranged to cover the burner,
The said part is a heat-source machine located between the said burner and the said electricity supply line.   The heat storage device according to claim 1, wherein the storage member includes a support portion capable of supporting the conduction wire.   The heat source device according to claim 2, wherein the support portion is provided on an outer wall of the storage member and is configured to be able to lock the energization line.   The heat source device according to claim 2 or 3, wherein the support portion is a groove formed in the outer wall of the storage member.   The heat source device according to claim 4, wherein at least one of one end and the other end in the extending direction of the groove is open. The groove is
The bottom,
First and second side surfaces respectively connected to both ends of the bottom in the width direction of the groove;
A retaining member provided on at least one of the end portions located on the opposite sides of the bottom portions of the first and second side surface portions,
The heat source device according to claim 4 or 5, wherein the support portion is configured to fix the energization wire by sandwiching the energization wire between the retaining member and the bottom portion. An ignition nozzle for igniting the burner;
A high voltage generating member for igniting the ignition nozzle by applying a voltage to the ignition nozzle;
The heat source machine according to any one of claims 1 to 6, wherein the energization line is a high-voltage cord that electrically connects the ignition nozzle and the high-voltage generating member.