JPH072851U - Combustion device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a combustion device capable of reducing wind noise caused by wind passing through a front cover. [Apparatus] A device provided with an exhaust pipe in the upper part, a heat exchanger for heating water, a burner for heating the heat exchanger, an intake fan, and a control device for controlling the operation of the device. A main body, a front cover for closing the front surface of the instrument main body, and a first air intake port at the lower part of the front cover,
A front duct for air circulation, which is provided inside the front cover and covers the first air intake port, has a length up to the lower part of the front cover, and has an opening at the upper part of the front duct from the first air intake port. A combustion device provided with a second inlet port having a small area.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a front cover for inhaling air and for covering an appliance body in a combustion device such as a bath with a gas water heater.

[0002]

[Prior art]

 Conventionally, as a structure of a front cover for covering an appliance main body of a combustion apparatus such as a bath heater with a gas water heater, there is an example disclosed in JP-A-61-105054. In this example, a front duct is attached to the front cover so that the front cover has a double structure to suppress the temperature rise of the electrical equipment box, prevent the temperature rise of the front cover, reduce the operating noise such as ignition noise, It was trying to prevent rain from entering the body.

[0003]

[Problems to be solved by the device]

 However, in the prior art example, by installing a front duct on the front cover and making the front cover double structure, although it is effective in reducing the instrument operating noise such as ignition noise, the wind from the outside is -It had a defect that the wind noise was loud when passing through the bar. That is, in the conventional example, since the opening area of the louver A is smaller than the opening areas of the upper and lower portions of the front duct 13, the resistance of the louver A when the outside air passes is the resistance when the front duct 13 passes. Therefore, there is a drawback that the outside air passage speed becomes larger when passing through the louver A than when outside air passes through the front duct 13, and the wind noise becomes louder.

The wind noise caused by the air supply is a new problem in this type of combustion device, and its solution is urgently needed. Therefore, an object of the present invention is to provide a combustion device that can reduce wind noise caused by wind passing through the front cover.

[0005]

Means for Solving the Problems In order to solve the above problems, in the present invention, an exhaust pipe is provided in the upper part, and a heat exchanger for heating water is provided in the lower part of the exhaust pipe to heat the heat exchanger. A burner, an intake fan, and a control unit that controls the operation of the instrument, the instrument main body, the front cover that closes the front of the instrument, and the first intake for the lower part of the front cover. A circulation port and a front duct for air circulation, which is provided inside the front cover and covers the first suction circulation port, has a length up to the lower portion of the front cover, and has a first duct at the upper part of the front duct. It is characterized in that a second intake circulation port having an opening area smaller than that of the first intake circulation port is provided.

[0006]

[Action]

 In the combustion apparatus of the present invention, a front duct is provided on the inner surface of the front cover so that the front cover has a double structure, and a lower portion of the front cover is provided with a first intake passage for sucking outside air. Since the second intake passage with a smaller opening area than the first intake passage was installed at the top of the duct, the passage speed of the wind noise near the second intake passage is close to that of the first intake passage. Since it is larger than that, it is possible to significantly reduce wind noise.

[0007]

【Example】

 An embodiment of the present invention will be specifically described below, for example, when it is applied to a bath kettle with a water heater. FIG. 1 is an external perspective view of a bath kettle with a water heater with the front cover opened. Reference numeral 1 denotes a bath kettle with a water heater. In a normal use state, a front cover-2 is provided on the front of the bath kettle 1 with a water heater. Reference numeral 3 denotes an exhaust pipe provided on the upper portion of the bath kettle with a water heater, and a bath heating heat exchanger 4 and a hot water supply heat exchanger 5 are provided on the lower portion of the exhaust pipe 3, respectively. A burner 6 and an intake fan 8 are provided below the bath-exchanging heat exchanger 4. A burner 7 and an intake fan 9 are provided below the heat exchanger 5 for hot water supply. The controller 10 controls the bath tub 1 with a water heater.

FIG. 2 is a detailed view of the front cover-2, and FIG. 2- (a) is a front view of the front cover-2. Reference numeral 21 is an exhaust port through which the exhaust pipe 3 is inserted. Front cover-2 front The lower part of the front cover-2 is provided with a first intake circulation port 24 for taking in outside air, and the back of the front cover-2 is provided with a front duct 25 shown in FIG. It has a double structure. A water passage 22 and a second air intake port 23 are provided in the upper portion of the front duct 25. FIG. 2- (b) is a perspective view showing details of the portion surrounded by the alternate long and short dash line in FIG. 2- (a). The upper part of the front duct 25 provided on the rear surface of the front cover-2 is provided with the inclined portion 12 which is inclined toward the lower part of the front cover-2, and the lower portion of the inclined portion 12 is provided with the water passage 22 and the second inlet port 23 for intake. Therefore, the water that has passed through the gap 11 in FIG. 3 is transmitted through the inclined portion 12 and the water passage 22 and is sent to the lower portion of the front duct 25. The water passage 22 is separated and independent from the second intake circulation port 23, so that the water passing through the water passage 22 does not flow to the second intake circulation port 23. The reason for this will be described with reference to FIG.

FIG. 2C is a top plan view showing the vicinity of the inclined portion 12. The hatched portion is the lower end of the inclined portion 12 and represents the portion sandwiched between the water passage 22 and the front cover-2, and is covered with a metal plate or the like. Further, as is clear from FIG. 2- (b), the water passage 22 is provided to a position lower than the lowermost portion of the second intake circulation port 23. Therefore, the water transmitted through the inclined portion 12 passes only through the water passage 22 and does not flow to the second intake circulation port 23.

In the present invention, the outside air passing through the first intake circulation port 24 passes through the space between the front duct 25 and the front cover-2, passes through the second intake circulation port 23, and enters the device body. Is guided. Further, the opening area of the second intake circulation port 23 is set to be smaller than the opening area of the first intake circulation port 24, and the resistance of the second intake circulation port 23 when the outside air passes is determined by the resistance of the first intake circulation port 24 to the outside air passage. Greater than the resistance of time.

Next, the flow of water passing through the front cover-2 due to the outside air and rain will be described with reference to FIGS. 4 and 5. FIG. 3 is a vertical cross-sectional view of the bath pot 1 with a water heater with the front cover-2 attached. The symbols described are omitted because they have already been described in FIGS. 1 and 2.

FIG. 4 is a diagram showing a flow of outside air passing through the first intake air circulation port 24. The outside air that has passed through the first intake circulation port 24 is sent to the upper portion of the front duct 25 along the front duct 25, and the outside air is divided into the second intake circulation port 23 and the water passage 22 at the upper part of the front duct 25. . Here, since the water passage 22 and the second intake circulation port 23 are separated and independent from each other, the outside air passing through the water passage 22 is used for cooling the exhaust stack 3, and the outside air passing through the second intake circulation port 23 is used. Is used for cooling the bath heating heat exchanger 4 and the hot water supply heat exchanger 5. In addition, in the present invention, since the opening area of the second intake circulation port 23 is smaller than the opening area of the first intake circulation port 24, the opening area of the second intake circulation port 23 is smaller than the resistance of the outside air passing through the first intake circulation port 24. The resistance of passing through the second intake circulation port 23 is large. Therefore, the speed of passing through the second intake circulation port 23 is higher than the speed of passing through the first intake circulation port 24. Therefore, the wind noise of the outside air is louder in the vicinity of the second intake circulation port 24 than in the vicinity of the first intake circulation port 24.

However, in the structure of the embodiment of the present invention, the front cover-2 has a double structure with the front duct 25 including the second intake circulation port 23, and the two circulation ports are arranged at the height position. Since they are different from each other, the wind noise generated at the second intake air circulation port 23 is blocked with almost no leakage to the outside when the front cover-2 is attached. Therefore, the wind noise of the outside air is determined by the wind noise at the first intake circulation port 24, which is lower than the wind noise at the second intake circulation port 23. That is, in the conventional example of the present invention, the wind noise passing through the louver in front of the front cover was louder than the wind noise passing through the front duct. By making the area of the first intake flow passage opening larger than the area of the second intake flow inlet opening of the front duct, the first intake flow passage passage speed can be made smaller than that of the conventional example, and It was possible to significantly reduce wind noise.

FIG. 5 is a diagram showing the flow of rainwater and the like that enters through the gap 11 when the front cover-2 is attached. Rainwater or the like that has entered through the gap 11 travels through the inclined portion 12 provided in the front duct 25, passes through the water passage 22, and is stored in the lower portion of the front duct 25. Since the inclined portion 12 is provided at an angle inclined toward the lower part of the front cover as shown in the figure, rainwater or the like does not enter the instrument body side. Further, the water passage 22 is completely separated and independent from the second intake circulation port 23, and rainwater in the water passage does not enter the instrument body side through the second intake circulation port 23. In other words, the present invention is intended to prevent the temperature rise of the equipment main body such as the exhaust stack and the heat exchanger, prevent the rainwater and the like from entering the equipment main body, and reduce the wind noise when the front cover passes through the outside air. Is.

[0015]

[Effect of device]

 In the present invention, the front cover attached to the combustion device is provided with a front duct so as to have a double structure. The front cover has a first intake passage through which outside air is inserted and a front duct has a first intake port. Since the second intake air inlet having a smaller opening area than the air intake outlet is provided, it is possible to reduce the wind speed when passing through the first intake air inlet, reducing wind noise when passing through the outside air, and It is possible to prevent temperature rise and prevent rainwater and the like from entering the equipment body.

[Brief description of drawings]

FIG. 1 is an external perspective view of a bath kettle with a water heater with a front cover opened.

FIG. 2-a is a front view of a front cover.

FIG. 2-b is a perspective view showing details of a portion surrounded by an alternate long and short dash line in FIG.

FIG. 2-c is an upper plan view showing the vicinity of the inclined portion 12.

FIG. 3 is a vertical cross-sectional view of the bath kettle with a water heater with a front cover attached.

FIG. 4 is a diagram showing a flow of outside air passing through a first intake air circulation port.

FIG. 5 is a diagram showing a flow of rainwater and the like that enters through a gap when the front cover is attached.

[Explanation of symbols]

 1 Bath Kettle with Water Heater 2 Front Cover 3 Exhaust Cylinder 4 Heat Exchanger for Bath Reheating 5 Heat Exchanger for Hot Water Supply 6 Burner 7 Burner 8 Intake Fan 9 Intake Fan 10 Control Unit 23 Second Intake Distribution port 24 First intake distribution port 25 Front duct

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[Procedure amendment]

[Submission date] February 18, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is an external perspective view of a bath heater with a water heater with a front cover opened.

FIG. 2 is a front view of a front cover.

FIG. 3 is a perspective view showing details of a portion surrounded by an alternate long and short dash line in FIG.

FIG. 4 is a top plan view showing the vicinity of the inclined portion 12;

FIG. 5 is a vertical cross-sectional view of the bath kettle with a water heater with a front cover attached.

FIG. 6 is a diagram showing a flow of outside air passing through a first intake air circulation port.

FIG. 7 is a diagram showing a flow of rainwater and the like that enters through a gap when the front cover is attached.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 5]

[Figure 3]

[Figure 4]

[Figure 6]

[Figure 7]

Claims (1)

[Scope of utility model registration request] 1. An exhaust pipe is provided in an upper part, and a heat exchanger for heating water is provided in a lower part of the exhaust pipe, and a burner for heating the heat exchanger, an intake fan, and operation of appliances are controlled. An instrument main body having a control device incorporated therein, a front cover for closing the front surface of the instrument main body, a first air intake port at a lower portion of the front cover, and an inside of the front cover, 1. A front duct for air circulation that covers the lower portion of the front cover by covering the first intake circulation port, and a second intake circulation port having an opening area smaller than the first intake circulation port at the upper part of the front duct. And a combustion device.