JPH0599470A - Hot-water supplier built-in type range hood - Google Patents

Abstract

PURPOSE:To abolish the troublesomeness of regulating the opening degree of a damper in accordance with the change of the amount of exhaust gas of a hot-water supplier and the condition of installation of an exhaust tube. CONSTITUTION:An exhaust duct 37 is connected to a hot-water supplier, accommodated in a range hood and a movable damper 36 is moved and regulated into the direction of an arrow in a diagram while an exhaust fan, whose suction port is opposed to the damper 36, is provided. A geared motor 51 is rotated in accordance with the amount of exhaust gas of the hot-water supplier and the exhaust fan while the area of the opening 36a of the suction port of the damper 36 is regulated by the operation of a pinion 52 and a rack 3 to drive the exhaust fan optimally. According to this method, the economical property of operation and the property of installation can be contrived in accordance with the amount of exhaust gas of the hot-water supplier automatically.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood having a built-in water heater and an exhaust fan which is installed on a kitchen cooking table to exhaust oily smoke produced during cooking.

[0002]

2. Description of the Related Art A range hood installed in a kitchen is constructed, for example, as shown in FIG. 5, and is located above a gas stove 2 of a gas appliance table 1, and a hood 3 is installed on a wall 4.
Then, the fan 5 provided inside the hood 3 sucks oily smoke generated during cooking using the gas stove 2 through the suction port 6 into the hood 3, and further through the exhaust unit 7, the fan 5 and the exhaust port 8. Is discharged. On the other hand, the hood 3 has a water heater 1 including a burner 9, a heat exchanger 10, and an operating mechanism 11.
2 is built in. This water heater 12 has an intake port 13 for combustion air opened on the front surface of the hood 3, and an exhaust port 14 for combustion exhaust gas is connected to an exhaust part 7 via a branch part 15.
The exhaust part 7 of the range hood is shared. Reference numeral 16 denotes a damper provided in the branch portion 15 for switching the exhaust between the exhaust port 14 on the water heater 12 side and the exhaust portion 7 on the range hood side. Then, the exhaust unit 7 was connected to the exhaust pipe 8 by installation work, and the oil smoke was discharged from the exhaust end 17 to the outside of the room.

[0003]

However, in the above-described conventional structure, the exhaust pipe 8 is different depending on the installation conditions, and the exhaust resistance due to the length of the exhaust pipe 8 and the number n of bends R is not uniform. Damper 1 according to the installation condition of the exhaust stack 8
It was cumbersome to adjust the opening degree of 6 to maintain the exhaust performance of the water heater 12. Further, when the water heater 12 is operated by the capacity proportional control that controls the fuel supplied to the burner 9 according to the hot water temperature, even if the heating capacity is small, the suction capacity of the exhaust fan 5 is constant, so that the water heater 12 is excessive. Another problem was the uneconomical operation of inhaling air to lower the heat exchange efficiency.

Therefore, the present invention solves the above-mentioned problems of the prior art, and copes with the changes in the exhaust resistance of the exhaust stack and the exhaust gas amount of the water heater to improve the installability and allow the hot water supply to be operated efficiently. Provide a vessel.

[0005]

In order to provide the above-mentioned efficient operation of the water heater, the first means of the range hood with a built-in water heater of the present invention is an exhaust port connected to the exhaust pipe of the installation construction member. , An intake port for outside air, an exhaust fan that connects to the exhaust port to discharge the inside air, a hood that closes the outside of the device airtight except for the intake port and the exhaust port, and an intake port for the exhaust fan. A movable duct that is open and has a variable opening area, a driver for the movable duct, a water heater that discharges exhaust gas by connecting to the other end of the movable duct that is different from the opening, and operation instruction input for the water heater and exhaust fan And a control device for reading the opening area of the movable duct corresponding to the exhaust gas amount of the water heater from the stored data by the input signal of the operating device and outputting the drive signal of the driver.

Further, in order to provide the above-mentioned improvement in installation, the second means of the range hood with a built-in water heater of the present invention is an exhaust port connected to the exhaust pipe of the installation construction member and an intake of outside air. Port, an exhaust fan that connects to the exhaust port to discharge the air inside the device, a hood that airtightly blocks the outside of the device except for the intake port and the exhaust port, and an opening area that can be opened at the intake port of the exhaust fan. A movable duct, a driver for the movable duct, a water heater connected to the other end different from the opening of the movable duct to discharge exhaust gas, a wind pressure sensor for detecting exhaust resistance of the exhaust pipe, and a detection by the wind pressure sensor. Upon receiving the signal, the opening area of the movable duct corresponding to the exhaust resistance of the exhaust stack is read from the stored data,
It is provided with a control device for outputting a drive signal of the driver.

[0007]

According to the first aspect of the present invention, when the heating capacity is controlled by the hot water supply operation condition of the water heater input to the operating device and the exhaust gas amount changes, the control device responds to the exhaust gas amount of the water heater. The opening area of the movable duct is read from the stored data of the opening area of the movable duct, and a drive signal is output. The driver that receives this drive signal operates the movable duct, and the exhaust fan appropriately sucks the exhaust gas of the water heater and discharges it to the exhaust stack. In this way, due to the suction action of the exhaust pipe corresponding to the heating capacity of the water heater, the water heater is free from the influence of the suction action of the combustion air by the exhaust fan, and the set value can be operated properly and economically.

According to the second means of the present invention, the range hood having a built-in water heater is installed and the exhaust pipe is constructed.
If the exhaust cylinder resistance changes when the installation specifications of the exhaust stack differ from the standard specifications assumed in advance, the wind pressure sensor detects the exhaust resistance during operation and sends detection data to the control device. Upon receipt of this detection data, the control device corrects and outputs the drive signal of the exhaust duct, which is stored in advance when the exhaust pipe work has standard specifications. The driver that receives the corrected drive signal controls the movable duct in accordance with the specifications of the exhaust stack construction of the exhaust stack. In this way, the opening area of the movable duct can be automatically adjusted to the specifications of the exhaust stack work, and the installation work can be improved by eliminating the need for adjustment work during installation.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a water heater built-in range hood according to the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of the present invention, in which a hood body 21 has an inverted L-shaped side surface, and an exhaust fan 24 having a suction port 23 is provided inside the hood body. In addition, an intake port 25 is provided on the front plate 21e of the hood body 21. The exhaust fan 24 exhausts the exhaust port 27.
Then, it is discharged to the outside by the exhaust pipe 28 as the installation work member. The water heater 29 is built in the hood body 21 in parallel with the exhaust fan 24. The water heater 29 includes a burner 31 installed in a case 30, a heat exchanger 32, a gas block 33,
It is composed of a water block 34. Combustion air is sucked into the case 30 from another intake port 35 on the side of the hood body 21, and the combustion exhaust gas of the burner 31 is exhausted as a movable duct 37 and a damper 3 provided at its end.
6 and flows toward the front side of the suction port 23 of the exhaust fan 24.
On the outlet side of the exhaust fan 24, the exhaust gas passing through the inside is the exhaust pipe 2.
An air pressure sensor 54 that detects the pressure difference between the pressure pushed out to the hood 8 and the internal pressure of the hood body 21 is airtightly provided.

FIG. 3 shows an exhaust duct 3 as a movable duct.
7, the exhaust duct 37 having one end connected to the water heater 29 has a damper 36 at the end opposite to the exhaust fan 24.
Is stored slidably in the left-right direction in the figure. Damper 3
A rack 53 is fixed to the pinion 6, and the rack 53 transmits the rotation of a geared motor 51 as a drive unit.
Driven by two. The damper 36 is in the shape of a bottomed cylinder having an opening 36a on the surface facing the suction port 23 of the exhaust fan 24, and the suction pressure of the exhaust fan 24 is effective.
It is configured to act on. The wind pressure sensor 54 and the like transmit and receive signals to and from the control device 41 as indicated by the broken line in the figure. When the controller 41 receives the operation instruction signal for the water heater 29 and the exhaust fan 24 from the operation device 42, the controller 41 outputs a drive signal to the water heater 29 and the exhaust fan 24.

Next, the operation of the exhaust fan 24 having the above-described structure will be described. The control device 41, which has received the operation instruction signal input by the operation device 42, determines the signal of the wind pressure sensor 54 and the hot water supply load of the hot water supply device 29. The drive signal of the geared motor 51 is searched based on the corresponding hot water supply instruction signal. The controller 41 stores in advance the opening degree data of the damper 36 shown in FIG. 4 corresponding to the differential pressure detected by the wind pressure sensor 54 in accordance with the exhaust resistance which varies depending on the installation condition of the exhaust pipe 28.
The exhaust fan 24 reduces the amount of exhaust when the positive pressure that pushes the exhaust out of the outside air increases. Therefore, the damper 36
Causes the exhaust fan 24 having a reduced suction capability to suck the same exhaust gas as when the exhaust resistance is small, and drives the damper 36 so as to enlarge the opening 36a, thereby increasing the damper opening.

On the other hand, the water heater 29 has a capacity proportional control function as a recent tendency, and the heating amount changes according to the hot water temperature and the hot water flow rate, and the exhaust gas amount also increases or decreases. When the amount of exhaust gas of the water heater 29 increases, the ventilation resistance (exhaust resistance) of the exhaust gas flowing in the exhaust pipe 28 increases. Therefore, the control device 41 also prepares beforehand the exhaust resistance corresponding to this exhaust gas amount as storage data, and the instruction signal of the damper opening degree corresponding to the operating state of the water heater 29 is combined with the installation condition of the exhaust pipe 28. Output in addition to the instruction signal. When the exhaust fan 24 is driven without operating the water heater 29, the damper 36 is
Since it becomes the resistance of the intake air of 8, the opening 36a overlaps with a part of the exhaust duct 37 by being driven to the exhaust duct 37 side, and the outlet portion 37a of the exhaust duct 37 is closed. Then, oil smoke or the like unnecessarily bypasses the water heater 29 via the intake port 35, and it is possible to prevent the oil content or the like contained in the oil smoke or the like from adhering to the intake port 35.

Thus, according to this embodiment, the exhaust pipe 28
When the exhaust resistance changes variously depending on the installation conditions, the control device 41 automatically drives the guard motor 51 based on the detection signal of the wind pressure sensor 54 to appropriately discharge the exhaust gas of the water heater 29. Further, the control device 41 can calculate the deviation from the set value of the exhaust resistance, correct the stored data of the damper opening in accordance with the installation conditions, and the feedback control of the damper 36 by the exhaust resistance detection signal is gradually unnecessary. Become. Further, it is possible to deal with the fluctuation of the exhaust gas amount for each use by the capacity proportional control of the water heater 29, etc., and the burner 31 due to the excessive suction action of the exhaust fan 24 when the heating amount is small.
It is also possible to prevent excess air from being supplied to the air conditioner, and to suppress uneconomical operation due to a decrease in heating efficiency. Furthermore, since the exhaust fan 24 is not connected to the exhaust duct 37 of the water heater 29, the work of disassembling the exhaust fan 24 and removing the adhesion of oil etc. is facilitated in addition to the ease of assembly. The effect of can be expected.

Even when the wind pressure sensor 54 is not provided, the water heater 29 can prevent intake of excess air when the heating capacity is small, and avoid uneconomical operation.

[0016]

As is apparent from the above description, the range hood with a built-in water heater of the present invention automatically responds to the exhaust gas amount of the water heater according to claim 1, and sucks excess air into the water heater. Can be suppressed to avoid driving uneconomical.

Further, according to the second aspect, it is possible to automatically cope with the exhaust gas amount of the exhaust stack and eliminate the adjustment of the equipment depending on the installation conditions, and it is possible to improve the installation property.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a range hood with a built-in water heater according to the present invention.

[FIG. 2] The same vertical sectional view

FIG. 3 is a perspective view of a main part of the exhaust duct.

FIG. 4 is a characteristic diagram of the damper opening.

FIG. 5 is a cross-sectional view of a conventional example.

[Explanation of symbols]

 21 Hood Main Body 24 Exhaust Fan 25, 35 Intake Port 27 Exhaust Port 28 Exhaust Cylinder 29 Water Heater 36 Damper 37 Exhaust Duct 41 Control Unit 42 Operator 51 Geared Motor 52 Pinion 53 Rack 54 Wind Pressure Sensor

Front page continuation (72) Inventor Akira Matsuda 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. An intake fan that has an exhaust port connected to an exhaust pipe of an installation work member and an intake port for outside air, and has an exhaust fan internally connected to the exhaust port to discharge the inside air, and the intake port. And a hood body that is airtightly closed to the outside of the device except the exhaust port, an opening communicating with the suction port of the exhaust fan, and a movable duct having a variable opening area, and a driver for the movable duct,
A water heater provided in the hood body, which is connected to the other end opening different from the opening of the movable duct, discharges exhaust gas through the movable duct, and an operation device for inputting operation instructions of the water heater and the exhaust fan. , A range hood with a built-in water heater equipped with a controller that reads the opening area of the variable duct corresponding to the exhaust gas amount of the water heater from the stored data by the input signal of the operation device and outputs the drive signal of the driver. 2. An exhaust fan, which has an exhaust port connected to an exhaust pipe of an installation work member and an intake port for outside air, and which is connected to the exhaust port and discharges internal air, and also has an intake port. Except for the exhaust port, there is a hood body that is airtightly closed to the outside of the device, a movable duct that has an opening that communicates with the suction port of the exhaust fan, and that has a variable opening area, a driver for this movable duct, and a movable duct. A water heater provided in the hood main body, which is connected to the other end opening different from the opening, exhausts exhaust gas through a movable duct, an operation device for inputting operation instructions of the water heater and the exhaust fan, and the exhaust stack A wind pressure sensor that detects the exhaust resistance of
A range hood with a built-in water heater equipped with a controller that receives the detection signal of the wind pressure sensor, reads the opening area of the movable duct corresponding to the exhaust resistance of the exhaust stack from the stored data, and outputs the drive signal of the driver.