JPH10281450A - Forced air-feeding/discharging type hot water feeder and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forced air-supplying/discharging type hot water feeder in which its structure is simple, component parts of the forced air discharging type hot water feeder or an outdoor type hot water feeder can be applied in common from each other, a small-sized outer installation can be attained and a temperature of supplied air can be prevented from being increased. SOLUTION: A forced air-supplying/discharging type hot water feeder is comprised of a combustion chamber 3 installed in an outer frame 2; a blower 4 arranged below the combustion chamber 3; a heat exchanger 5 arranged above the combustion chamber 3; a discharging pipe 6 cooperatively arranged at the upper segment of the heat exchanger 5; a discharging opening 2a formed at the upper surface of the outer frame 2; an air feeding opening 2b formed below a rear surface of the outer frame 2; an air feeding duct 7 arranged at a rear surface of the outer frame 2 so as to be communicated with the air feeding opening 2b; and an air feeding chamber 8 having an air feeding pipe 9 at its upper surface and arranged above the outer frame 2 and the air feeding duct 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced water supply / exhaust water heater having a double supply / exhaust pipe and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, the following are disclosed as hot water supply / exhaust water heaters. a, a blower disclosed in Japanese Patent Application Laid-Open No. 1-142316 (hereinafter, referred to as "A") with a suction port directed to the rear surface of the exterior at the lower portion of the exterior, and a combustion section containing a burner above the blower; The heat exchange section and the exhaust section are arranged in this order, and the exhaust pipe connected to the exhaust section and the supply cylinder surrounding the exhaust pipe are extended outside the exterior, and the supply pipe connected to the supply cylinder and opened to the rear of the exterior. A forced water supply / exhaust water heater in which an air chamber is provided in an upper part of an exterior, and a suction port and a connection port are connected via a rectangular duct having a wide surface parallel to a rear surface of the exterior. b. An air supply passage is formed on the rear side of a combustion chamber in a rear case mounted on a wall surface and air is supplied above the combustion chamber, as disclosed in Japanese Utility Model Publication No. 3-45002 (hereinafter referred to as "B" publication). An air supply box communicating with the passage was formed, an exhaust elbow connected to the upper part of the combustion chamber was housed in the air supply box, and formed on the downstream open end of the exhaust elbow and a rear wall of the air supply box. The air supply opening corresponds to the arrangement of the exhaust pipe and the air supply pipe, the work opening is opened in the front part of the air supply box, and the work opening is removably closed by a cover plate, and the upstream end of the exhaust pipe is closed. A forced-supply / exhaust-type combustion device connected to the downstream open end and having the upstream flange portion of the air supply pipe attached to the periphery of the air supply opening. (c) Japanese Patent Publication No. 6-39233 (hereinafter referred to as "C" publication), the position of the duct facing the electric component is formed by an L-shaped bent plate, and a plurality of through holes are formed in the bent plate. At the same time, an air guide plate is provided in the duct between the connection port of the fan and the through hole to guide air sucked from the air supply pipe to the connection port without directly hitting the bent plate, and both ends of the air guide plate are provided. A forced-supply / exhaust-type combustion device provided with a gap that can serve as an air passage between the casing and the outer frame of the duct.

[0003] The structure and manufacturing method of the forced supply / exhaust water heater disclosed in Japanese Patent Application Laid-Open Publication No. H08-27205 will be described below with reference to the drawings. FIG.
FIG. 2 is a sectional view of a main part of a conventional forced supply / exhaust water heater. In the drawing, reference numeral 11 denotes a conventional forced supply / exhaust water heater, 12 denotes an exterior of the forced supply / exhaust type water heater 11, 13 denotes a combustion part disposed in the exterior 12, and 14 denotes a lower part of the combustion part 13. Blower,
Reference numeral 15 denotes a heat exchange unit disposed above the combustion unit 13, 16 denotes an exhaust unit connected to an upper part of the heat exchange unit 15, 16 a denotes an exhaust tube connected to the exhaust unit 16, and 17 denotes a suction of the blower 14. A duct arranged on the back side of the combustion chamber 13 inside the exterior 12 in communication with the mouth, an air supply chamber 18 communicated with the duct 17 and arranged above the exhaust portion 16 inside the exterior 12, 18a is an upper plate of the air supply chamber 18, 18b is a lower plate of the air supply chamber 18 having an insertion hole of the exhaust pipe 16, 18c is a cover plate disposed around the insertion hole of the lower plate 18b, and 18d is a supply plate. Air chamber 18 and duct 1
A connection port 19 communicating with 7 is an air supply cylinder disposed on the upper plate 18 a and communicating with the air supply chamber 18. Hereinafter, a method of manufacturing the conventional forced supply / exhaust water heater configured as described above will be described. In the duct forming step, the duct 17 is formed by an edge cutting step, a drilling step, and seven bending steps of the duct 17, and then the lower plate 18b formed by the edge cutting step, the drilling step, and the seven bending steps And the duct 17 are attached by spot welding (9 places in total). Next, in the air supply chamber forming step, the upper plate 18a is formed by the bending step after the drilling step and the burring step, and then the air supply cylinder 19 is attached to the holed part of the upper plate 18a by four spot weldings. Next, the upper plate 18a is attached to the lower plate 18b attached to the duct 17 in the duct forming step by spot welding 11 times, and the air supply chamber 18 is formed. Next, in a step of installing the duct and the air supply chamber in the step of assembling into the exterior, the duct 17, the air supply chamber 18, and the air supply cylinder 19 formed in the duct formation step and the air supply chamber formation step are used for the exterior 1
2 are attached with approximately 12 screws. Thereafter, the suction port of the blower 14 and the duct 17 are connected to mount the blower 14 inside the exterior 12, and further, the combustion unit 13 and the heat exchange unit 1
5. The heat exchanger assembly in which the exhaust portion 16 and the exhaust tube 16a are integrally assembled is fixed in the exterior 12 with approximately four screws. Also, the two-part cover plate 18c having the outer shape removed and perforated is fixed to the insertion portion of the lower plate 18b of the air supply chamber 18 through the exhaust tube 16a with approximately four screws.

[0004]

However, the above-mentioned conventional forced supply / exhaust water heater has the following problems.
In the forced supply / exhaust water heater described in Japanese Patent Publication No. A, since the duct is formed in a rectangular shape and provided inside the exterior in parallel with the rear surface of the exterior, the production and installation of the duct require many steps, and thus the production is required. Lack of sex. Further, since the duct is connected to the connection port of the air supply chamber and the suction port of the blower and is disposed inside the exterior, the workability of mounting the duct is lacking. Furthermore, since the duct and the air supply chamber are located inside the exterior, the duct and the air supply chamber lack heat dissipation, and heat is easily trapped inside the exterior, causing malfunctions of the controller and gas mechanism parts. easy. In the forced supply / exhaust-type combustion device described in Japanese Patent Application Publication No. H10-27139, a flange portion of an air supply pipe is attached to a periphery of an air supply opening, a cover plate is attached to a working opening, and a front case is attached to a rear case. Therefore, the structure is complicated, the number of assembling steps is increased, and productivity is lacking.
Further, since the box body having the air supply passage is arranged in the rear case, and furthermore, the air supply box is arranged so as to protrude toward the front case side,
Since the rear case and the front case are large, the size of the forced supply / exhaust type combustion apparatus is large, and the air supply passage is formed in a box, so that the structure is complicated, the number of manufacturing steps is increased, and productivity is lacking. In the forced supply / exhaust type combustion appliance described in the publication No. C,
Since the duct is connected to the air supply cylinder and fan air supply cylinder and arranged inside the equipment exterior, and multiple air guide plates are arranged inside the duct, the structure of the duct is complicated, requiring assembly man-hours and lacking productivity . In addition, there are three types of gas water heaters: semi-closed type, closed type, and outdoor type. The closed type forced supply / exhaust type water heater is the same as the semi-closed type forced exhaust type water heater and the outdoor type water heater. If the air supply duct is installed inside the exterior using a burner, heat exchanger, etc., the structure inside the exterior of the forced supply / exhaust water heater will be complicated, and the exterior will become large, and at the same time, the forced exhaust hot water supply will be performed. It is difficult to use common parts such as water heaters and outdoor water heaters and exterior parts, and it requires production facilities and production lines dedicated to forced water supply / exhaust water heaters, and lacks productivity. Further, the forced supply / exhaust water heater represented by Japanese Patent Publication No. A requires 68 man-hours as shown in the above-mentioned manufacturing method, and lacks manufacturing workability and productivity.

The present invention solves the above-mentioned conventional problems, and has a simple structure, enables common use of exterior parts and the like with a forced exhaust water heater or an outdoor water heater, and can reduce the size of the exterior. The provision of a forced water supply / exhaust water heater that can prevent a rise in supply air temperature and prevent the occurrence of functional failure due to heat in the control section, etc. It is an object of the present invention to provide a method of manufacturing a forced water supply / exhaust water heater that is excellent in performance and mass productivity.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a forced supply / exhaust water heater according to the present invention is provided with a combustion chamber disposed inside an exterior and a lower part of the combustion chamber. A blower, a heat exchanger disposed above the combustion chamber,
A forced water supply / exhaust water heater having an exhaust pipe connected to an upper part of the heat exchanger, wherein an exhaust opening formed in an upper surface of the exterior and a lower part of a rear side of the exterior are formed. An air supply opening, an air supply duct arranged on the back side of the exterior so as to communicate with the air supply opening, and an air supply pipe on an upper surface, the exterior and the air supply duct And an air supply chamber disposed above. With this configuration, the air supply duct is arranged outside the back side of the exterior, so there is no need for space for installing the air supply duct inside the exterior,
It has the effect that the exterior can be reduced in size and shared with the exterior such as a forced exhaust water heater or an outdoor water heater, and the exterior can be standardized. In addition, since the air supply chamber is located outside the exterior above the exterior and the air supply duct, heat can be radiated at the highest air supply temperature in the upper part of the exterior, and the air supply temperature and the temperature inside the exterior rise. This has the effect of preventing the occurrence of functional failure of the control unit and gas components due to heat. Also,
The method for manufacturing a forced supply / exhaust water heater according to the present invention includes a combustion chamber disposed inside an exterior, a blower disposed below the combustion chamber, and a heat exchange disposed above the combustion chamber. A forced air supply / discharge type water heater having a water heater and an exhaust pipe connected to an upper part of the heat exchanger, wherein the air supply duct forming step, the air supply chamber forming step, and the exterior And an assembling step including a step of attaching the air supply chamber to the outside of the vehicle. Thereby, in the process of forming the air supply duct, the air supply duct can be attached to the outside of the exterior, and in the installation process, the air supply pipe is fitted over the exhaust pipe, and the air supply chamber is provided above the exterior and the air supply duct. By simply attaching it, you can form a passage for air supply,
This has the effect of reducing the number of steps in the assembling process and significantly reducing the number of steps required for manufacturing the forced supply / exhaust water heater.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A forced supply / exhaust water heater according to a first aspect of the present invention includes a combustion chamber disposed inside an exterior, a blower disposed below the combustion chamber, and the combustion chamber. A forced water supply / exhaust water heater having a heat exchanger disposed above a chamber and an exhaust pipe connected to an upper part of the heat exchanger, the exhaust water being formed on an upper surface of the exterior. An opening, an air supply opening formed below the rear side of the exterior, an air supply duct arranged on the rear side of the exterior so as to communicate with the air supply opening, and an upper surface. An air supply pipe; and an air supply chamber disposed above the exterior and the air supply duct. As a result, an air supply duct can be formed by the air supply duct disposed on the rear side of the exterior and the air supply chamber disposed above the exterior and the air supply duct, and the air supply duct and the air supply duct can be formed outside the exterior. Since the air chamber is provided, it has an effect that the exterior can be reduced in size. In addition, since the air supply chamber is located outside the upper part of the exterior, the air supply chamber touches the outside air to prevent the temperature of the air supply from rising, and it is possible to prevent the temperature inside the exterior from rising. It has the effect of preventing the occurrence of functional failures of gas and gas components.

According to a second aspect of the present invention, in the forced water supply / exhaust water heater according to the first aspect, the air supply duct includes a rear plate, and a bottom plate connected to the rear plate. And a side plate connected to the rear plate and the bottom plate. This has the effect that the duct can be formed by the rear surface of the exterior and the rear plate, bottom plate, and side plate of the air supply duct only by disposing the air supply duct on the rear surface of the exterior. In addition, since the front side of the air supply duct that is in contact with the rear side of the exterior is open, the air supply duct can be connected to the air supply opening simply by disposing the air supply duct on the rear side of the exterior.

According to a third aspect of the present invention, there is provided a method for manufacturing a forced-supply / exhaust water heater, comprising: a combustion chamber disposed inside an exterior; a blower disposed below the combustion chamber; A method of manufacturing a forced-supply / exhaust water heater having a heat exchanger disposed above and an exhaust pipe connected to an upper portion of the heat exchanger, the method comprising: forming the air supply duct; , An air supply chamber forming step, and an assembling step including a step of attaching the air supply chamber to the outside of the exterior. This allows
In each forming step, an air supply duct and an air supply chamber are formed, and in the assembly step, an air supply passage can be formed simply by attaching the air supply chamber to the outside of the exterior. It has the effect of being able to improve and significantly reduce the number of manufacturing steps.

(Embodiment) Hereinafter, an embodiment of a forced supply / exhaust water heater according to the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a main part of a forced supply / exhaust water heater according to the embodiment. In the figure, reference numeral 1 denotes a forced water supply / exhaust water heater in the embodiment, 2 denotes an exterior of the forced water supply / exhaust water heater 1,
2a is an exhaust opening formed on the upper surface of the exterior 2, 2b is an air supply opening formed on the lower side of the back of the exterior 2, and 3 is disposed inside the exterior 2. Combustion chamber, 4
Is disposed below the combustion chamber 3, and the suction port is provided with the air supply opening 2.
b, a heat exchanger 5 disposed above the combustion chamber 3, a heat exchanger 6 connected to an upper part of the heat exchanger 5,
An exhaust pipe fitted into the exhaust opening 2a of the first embodiment, 7 is an air supply duct connected to the air supply opening 2b and disposed on the back side of the exterior 2, and 8 is an exhaust duct of the air supply duct 7 and the exterior 2 An upper air supply chamber, 8a is a cover plate disposed around the exhaust opening 2a, and 9 is an upper surface of the air supply chamber 8 which communicates with the air supply chamber 8 and has an exhaust pipe. Reference numeral 6 denotes an air supply pipe fitted externally, and 9a denotes an air supply section formed by the air supply pipe 9 and the exhaust pipe 6. The arrows in FIG. 1 indicate the flow of outside air sucked from the air supply unit 9a by the blower 4 when the forced supply / exhaust water heater 1 is operated.

A method for manufacturing the forced water supply / exhaust water heater constructed as described above will be described below with reference to the drawings. FIG. 2 is an exploded perspective view of the forced supply / exhaust water heater according to the embodiment. In the figure, 7a is a rear plate of the air supply duct 7, 7b is a bottom plate connected to the rear plate 7a of the air supply duct 7, 7c is a rear plate 7a and a bottom plate 7b of the air supply duct 7
The side plates 10 are fixed screws. In the process of forming the air supply duct, the air supply duct 7 including the rear plate 7a, the bottom plate 7b, and the side plate 7c is formed by a drilling process and five bending processes. It is arranged on the back side and fixed with eight fixing screws 10 from the inner side. In the process of forming the air supply chamber, the air supply chamber 8 is formed by a drawing process, a total punching process, a drilling process, and a bending process.
Next, the air supply pipe 9 is attached to the perforated portion of the air supply chamber 8 by four spot welding. In the process of assembling into the exterior, as shown in FIG. 1, the suction port of the blower 4 is connected to the air supply opening 2b.
And a blower 4 is disposed inside the exterior 2, and the heat exchanger assembly in which the combustion chamber 3, the heat exchanger 5, and the exhaust pipe 6 are integrally assembled is installed inside the exterior 2 with four screws. Fix it. Next, the cover plate 8a is attached around the exhaust opening 2a with four screws. Next, in the air supply chamber mounting step, the air supply chamber 8 formed in the air supply chamber forming step is fixed above the exterior 2 and the air supply duct 7 with six fixing screws 10.

As described above, the forced supply / exhaust water heater in the embodiment is constructed and manufactured, and thus has the following operation. Since the air supply duct and air supply chamber are located outside the exterior, the exterior can be reduced in size and the exterior can be used with the same dimensions as the exterior of conventional forced exhaust water heaters and outdoor water heaters. This has the effect that the formation of the exterior can be automated and standardized. Further, since the exhaust opening and the air supply opening can be simply formed on the exterior of the semi-closed forced exhaust type water heater or the outdoor type water heater, it can be used as the exterior of the forced supply / exhaust type water heater. In addition, there is no need to separately manufacture an exterior for a forced water supply / exhaust water heater from the beginning, so that the production line can be significantly shortened and the number of working steps can be significantly reduced. In addition, the air supply duct is provided outside the exterior, and the air supply chamber located at the highest temperature of the air supply in the upper part of the exterior is provided outside the exterior. The duct and the air supply chamber can radiate heat, and have an effect of preventing an increase in the supply air temperature and the temperature inside the exterior. Since the air supply duct is formed of a rear plate, a bottom plate, and a side plate, simply fixing the air supply duct to the outside back of the exterior, the rear of the exterior, the rear plate, the bottom plate, and the side of the air supply duct. The face plate has an effect that a duct communicating with the air supply opening can be formed. In addition, in the process of installing the air supply chamber in the process of assembling to the exterior, the air supply duct is arranged on the back of the exterior of the exterior, and the air supply chamber is arranged above the exterior and the air supply duct. The air supply passage including the air supply duct and the air supply chamber can be formed on the outside of the device, so that the number of work steps in the assembling process can be reduced and the assembling workability can be improved. In addition, since the air supply duct and air supply chamber are arranged outside the exterior, the workability of installing the air supply duct and the air supply chamber can be improved, and the number of manufacturing steps can be reduced. It has the function of easily installing and removing a chamber, a blower, a heat exchanger, etc., and has excellent maintainability. Further, the number of manufacturing steps of the forced supply / exhaust water heater can be significantly reduced from about 68 steps of the conventional manufacturing steps to about 37 steps,
It can be manufactured with about 55% of the man-hours of the conventional manufacturing man-hour, and has an effect that productivity can be remarkably improved.

[0013]

As described above, according to the forced supply / exhaust water heater and the method of manufacturing the same according to the present invention, the following excellent effects can be realized. a, According to the first aspect of the present invention, since the air supply duct and the air supply chamber are provided outside the exterior, the exterior can be downsized compared to the exterior of the conventional forced supply / exhaust water heater. The air supply duct is arranged outside the exterior, and furthermore, the air supply chamber at the top of the exterior where the air supply temperature is highest during the operation of the forced air supply / discharge type water heater is arranged outside the exterior, It can dissipate heat by touching the outside air, improve the heat dissipation of the air supply duct and air supply chamber, prevent the air supply temperature and the temperature inside the exterior from rising, and prevent the functional parts of the control unit and gas components from being damaged by heat. And the durability of each device is excellent. Since the air supply duct and air supply chamber are located outside the exterior, the combustion chamber, blower,
It is easy to install and remove heat exchangers, etc., and it is excellent in maintainability when each device breaks down. b, according to the invention of claim 2, in addition to the effect of claim 1,
By forming the air supply duct with a rear plate, a bottom plate, and a side plate, the air supply duct can be easily formed, the man-hour for manufacturing the air supply duct can be reduced, and the front portion of the air supply duct that contacts the rear surface of the exterior. Is open, so simply fixing the front side of the air supply duct to the back of the exterior, the duct connected to the air supply opening by the back of the exterior, the rear plate, the bottom plate, and the side plate of the air supply duct It can be easily formed, the number of work steps required for the conventional air supply duct mounting process can be reduced, the productivity is excellent, and the cost can be reduced. c, According to the invention of claim 3, in the step of assembling to the exterior,
By simply arranging the air supply chamber on the exterior and the upper surface of the air supply duct, an air supply passage communicating with the air supply duct can be formed, reducing the number of work steps in the installation process and placing the air supply duct outside the exterior. Because it is fixed, it is easy to install the combustion chamber, blower, heat exchanger, etc. inside the exterior, and the man-hour required for the installation process to the exterior can be reduced to almost half of the conventional process. Excellent. It can be used as the exterior of the forced supply / exhaust water heater only by forming the exhaust opening and the air supply opening on the exterior of the semi-closed forced exhaust water heater or the outdoor water heater. Parts can be standardized and standardized.Production can be performed using production equipment and production lines for conventional semi-enclosed forced exhaust water heaters and outdoor water heaters. 45% reduction and excellent productivity.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a forced water supply / exhaust water heater according to an embodiment.

FIG. 2 is an exploded perspective view of a forced supply / exhaust water heater according to the embodiment.

FIG. 3 is a sectional view of a main part of a conventional forced supply / exhaust water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forced supply / exhaust water heater 2 Exterior 2a Exhaust opening 2b Air supply opening 3 Combustion chamber 4 Blower 5 Heat exchanger 6 Exhaust pipe 7 Air supply duct 7a Rear plate 7b Bottom plate 7c Side plate 8 Air supply room 8a Cover plate 9 Air supply pipe 9a Air supply unit 10 Fixing screw 11 Conventional forced supply / exhaust water heater 12 Exterior 13 Burning unit 14 Blower 15 Heat exchange unit 16 Exhaust unit 16a Exhaust tube 17 Duct 18 Air supply chamber 18a Upper plate 18b Lower plate 18c Cover plate 18d Connection port 19 Air supply cylinder

Claims (3)

[Claims] 1. A combustion chamber disposed in an exterior, a blower disposed below the combustion chamber, a heat exchanger disposed above the combustion chamber, and an upper part of the heat exchanger A forced air supply / exhaust water heater having an exhaust pipe connected to the exterior, wherein an exhaust opening formed on an upper surface of the exterior and an air supply opening formed below a rear side of the exterior. Part, an air supply duct disposed on the back side of the exterior so as to communicate with the air supply opening, and an air supply pipe on the upper surface, and disposed above the exterior and the air supply duct. A forced air supply / exhaust water heater, comprising: 2. The air supply duct includes a rear plate, a bottom plate connected to the rear plate, and a side plate connected to the rear plate and the bottom plate. The forced water supply / exhaust water heater according to claim 1. 3. A combustion chamber disposed in an exterior, a blower disposed below the combustion chamber, a heat exchanger disposed above the combustion chamber, and an upper part of the heat exchanger. A method for producing a forced air supply / exhaust type water heater having an exhaust pipe connected to the outside, wherein a step of forming the air supply duct, a step of forming the air supply chamber, and the step of supplying the air to the outside of the exterior. A method for manufacturing a forced-supply / exhaust water heater, comprising: an assembling step having an air chamber attaching step.