JP2003042564A - Warm air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a fault of a water supply pump due to an operation in a state in which water in a water receiving water tank received from a water supply tank is frozen. SOLUTION: A warm air heater comprises an indoor temperature sensor 61, and a microcomputer 10 for controlling to inhibit an operation of a motor operated water supply pump 48 when the sensor 61 once detects, for example, 0 deg.C or lower. The microcomputer 10 controls to maintain the inhibiting state until 10 deg.C or higher is, for example, detected even if an indoor temperature is raised.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot air heater such as an FF oil hot air heater or a FF gas hot air heater having a humidifying function.

[0002]

2. Description of the Related Art Heretofore, as a hot air heater of this type (hereinafter referred to as a heater), an air flow passage connecting an air inlet and an air outlet is formed in a main body case, and combustion is performed in the air flow passage. A heat exchanger to which combustion hot air is supplied from the section is provided, and the air from the air suction port is applied to the heat exchanger by a blower to supply hot air after heat exchange to the room through the outlet. In addition, a humidifying plate is provided in the air flow passage on the leeward side of the heat exchanger, the water in the water receiving tank received from the water supply tank is supplied by a water supply pump, and the warm air blows the inside of the humidifying plate. It is known that the humidifying water is vaporized and supplied together with the warm air into the room. Further, generally, the main body case is provided with an insertion / removal opening that is opened and closed by a lid for inserting and removing the humidification tray, and the humidification tray is humidified by removing the humidification tray from the insertion / removal opening. It supplies water for cleaning and cleans the humidifying tray.

[0003]

However, when the temperature is lowered and the water in the water receiving tank received from the water supplying tank for supplying water to the humidifying tray is frozen, the water supplying pump is operated. The pump will break down. Further, even if the water supply pump operates in the frozen state, water cannot be supplied to the humidifying tray, resulting in a failure error of the water supply pump.

Therefore, in order to solve the above problems, the present invention prevents the water supply pump from malfunctioning by operating in a state where the water in the water receiving tank received from the water supplying tank is frozen. With the goal.

[0005]

Therefore, the first invention is
An air flow passage that connects the air suction port and the air outlet is formed in the main body case, and a heat exchanger to which combustion hot air is supplied from the combustion unit is provided in the air flow passage, and the air suction port is provided by the blower. The air from the heat exchanger is applied to the heat exchanger to supply warm air after heat exchange into the room through the outlet, and the water in the water supply tank is in the air flow passage on the lee side of the heat exchanger. A warm air heater is provided in which a humidifying plate to be supplied by a water supply pump is arranged, and the humidifying water in the humidifying plate is evaporated by the warm air and supplied to the room together with the warm air. And a control device for controlling, when the temperature sensor detects a temperature equal to or lower than a first predetermined temperature, prohibiting the operation of the water supply pump until a temperature higher than a second predetermined temperature is detected. It is characterized by that.

[0006] According to a second aspect of the present invention, a blower flow passage is formed in the main body case to connect the air suction port and the blowout port, and a heat exchanger to which combustion hot air is supplied from the combustion unit is arranged in the blower flow passage. The air blower blows air from the air inlet to the heat exchanger to supply hot air after heat exchange to the room through the outlet, and to send air on the leeward side of the heat exchanger. A humidifying tray is provided in the air flow passage to which the water in the water receiving tank received from the water supplying tank is supplied by a water supply pump, and the humidifying water in the humidifying tray is evaporated by the warm air to enter the room together with the warm air. In the hot-air heater configured to supply, a temperature sensor that detects the temperature of the water receiving water tank or the water in the water tank, and if the temperature sensor detects a temperature equal to or lower than a first predetermined temperature, Operation of the water supply pump until the temperature above 2 is detected. Characterized in that a control device for controlling to prohibit.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an oil warm air heater. In FIG. 1, a petroleum warm air heater (hereinafter referred to as a heater) 1 includes a box-shaped main body case 4 having a case main body 2 and a front panel 3 detachably attached to the case main body 2. At the bottom of the panel 3, a horizontally elongated warm air blowing grill (warm air outlet) 5 having a plurality of horizontal guide vanes is exposed. Also, on the upper part of the front panel 3,
An operating switch 6 for operating the heater 1, an operating unit 8 having a set temperature switch 7 for setting a desired room temperature, etc., and a display unit 9 for displaying the operating mode, set temperature, etc. of the heater are provided. It is connected to a microcomputer (hereinafter, referred to as a microcomputer) 10 which is a control device described later.

In FIG. 2, an air suction port 20 equipped with a removable filter (not shown) is provided on the upper portion of the back plate of the case body 2. Reference numeral 11 denotes a back guard attached to the rear portion of the case main body 2. The back guard 11 is composed of a top plate and left and right side plates, and is above and to the left and right of the rear space between the case main body 2 and the chamber wall. It covers one.

An air flow passage 12 is formed in the case body 2 so as to extend from the air suction port 20 to the warm air blowing grill 5. In the air flow passage 12, a petroleum burner 13 that vaporizes and burns petroleum fuel such as kerosene, a combustion cylinder 14 connected to the petroleum burner 13, a connection box 15 connected to the combustion cylinder 14, A heat exchanger 18 having a heat exchange pipe 16 and an exhaust collection box 17, and an exhaust pipe 19 connected to the exhaust collection box 17 for discharging the combustion exhaust gas after heat exchange to the outside of the room are provided.

An oil leveler (not shown) for accumulating petroleum fuel sent from an oil supply pipe (not shown) is accommodated in the lower part of one side of the case body 2, and the fuel in the oil leveler is Fuel pump 22 and fuel supply pipe 21
It is supplied to the oil burner 13 via the.

Reference numeral 25 denotes an air supply blower equipped with a burner motor 26 for supplying combustion air to the oil burner 13,
An air supply pipe 27 is connected to one end surface of the air supply blower 25, and the other end portion is connected to the oil burner 13.

A blower 31 for warm air is provided in the upper part of the case body 2 so as to face the air inlet 20, and the blower 31 for warm air has a fan motor 33 and a plurality of sirocco fans 34 (convection). Fan) and a plurality of fan cases 35, and the room air sucked into the case body 2 from the air suction port 20 is blown toward the heat exchanger 18.

A humidifying tray 40 for storing humidifying water vaporized by warm air is detachably accommodated in the air flow passage 12 on the leeward side of the heat exchanger 18, that is, in the lower portion of the case body 2. A dish receiver 36 is provided. The humidifying tray 40 can be taken out of the case body 2 through an insertion / removal opening formed by removing the warm air blowing grill 5.

The plate receiving member 36 is made of a material having thermal conductivity, and a detection sensor 44 for detecting the temperature of the humidifying plate 40 is provided on the lower surface side of the bottom plate 43 of the plate receiving member 36 which is in contact with the humidifying plate 40. Is attached.

The humidifying dish 40 is provided with an evaporation accelerating body 38 made of ceramic fiber as a base material and having air permeability and water absorption. The evaporation accelerating body 38 sucks the water in the humidifying tray 40 and is kept in a moist state, and the moisture vaporized by the contact of the hot air with the evaporation accelerating body 38 is supplied to the room through the warm air blowing grill 5. Be humidified.

The water supply device 45 provided on the right side of the plate receiver 36 is a cartridge type water supply tank 47 which is removable by opening a lid 52 on the top surface of the main body case 4, and humidifying water from the water supply tank 47. Receiving water Receiving water tank 46
And an electric water supply pump 48 for pumping the humidifying water in the water receiving water tank 46, and the humidifying tray 4 connected to the pump 48.
It is composed of a water supply pipe 51 for supplying water to 0.

The water receiving water tank 46 is detachably fixed in the case main body 2 so that a substantially constant amount of water can be maintained therein. That is, a cap with a valve is provided at the bottom of the water supply tank 47, and the water receiving water tank 4 has a substantially constant amount.
6 is supplied with water for humidification.

The electric water supply pump 48 has its suction port located below the water surface in the water receiving water tank 46, and the water supply pipe 51 is connected to its discharge port, and the tip discharge port of this water supply pipe 51 is connected to the humidifying tray 40. It faces directly above. The electric water pump 48 is
It is composed of a magnet pump or an electromagnetic pump and operates in the humidification operation mode. The electric water supply pump 48 is variable so that the pumping amount increases or decreases according to the increase or decrease in the rotation speed of the sirocco fan 34 (the rotation speed of the fan motor 33) during its operation, but the pumping amount is substantially constant. May be.

Next, the control block diagram of FIG. 3 will be described. On the input side of the microcomputer 10, the operation switch 6 and the set temperature switch 7, which are provided on the operation unit 8,
The detection sensor 44, a frame rod 60 for detecting the presence or absence of a flame formed in the burner head of the oil burner 13, an indoor temperature sensor (room thermistor) 61 for detecting the indoor temperature, and a temperature for detecting the temperature of the burner body. A sensor (burner thermistor) 62 or the like is connected, and a heater 65 for heating the burner body, an ignition transformer 66 as an ignition device, the fuel pump 22, the burner motor 26 of the air supply blower 25, the fan motor 33 are connected to the output side. The display unit 9, the water supply pump 48, etc. are connected.

With the above configuration, when the operation switch 6 is operated to start the operation of the oil warm air heater 1, the heater 6
When the temperature of the burner body of the oil burner 13 reaches a temperature suitable for the ignition operation, the temperature sensor 6
When 2 is detected, the burner motor 26 starts to rotate, the combustion air is supplied, the petroleum fuel is supplied from the fuel supply pipe 21 by the operation of the fuel pump 22, and the petroleum burner 13 starts the combustion. When the number of rotations of the burner motor 26 reaches a predetermined number or more, the ignition transformer 66 performs the ignition operation, and it is detected that the flame current is detected by the flame rod 60.

When the combustion of the oil burner 13 is started, the combustion gas is discharged to the outside from the exhaust pipe 19 through the heat exchanger 18.

Here, when the temperature of the heat exchanger 20 becomes higher than a predetermined temperature, the blower 31 for warm air is driven, and the indoor air purified by the filter is sucked into the main body case 4 from the air suction port 20. , This air is accelerated by the sirocco fan 34 of the blower 31 for warm air, and is blown toward the heat exchanger 18, and heat-exchanges with the heat exchanger 18 to become warm air. It is discharged toward the front of the main body case 4 to heat the room.

At this time, warm air comes into contact with the humidifying dish 40 and the evaporation promoting body 38 provided on the downstream side of the heat exchanger 18, and the hot air heats the water stored in the humidifying dish 40. As the water is evaporated, the water sucked up by the evaporation promoting body 38 is evaporated and vaporized, and the vaporized water is discharged from the warm air blowing grill 5 together with the warm air, and the room is heated and warmed at the same time. .

The hot air is heated as described above,
The combustion amount of the oil burner 13 is controlled by the microcomputer 10 based on the temperature detected by the indoor temperature sensor 61 so that the temperature is set by the set temperature switch 7.

Next, referring to the flowchart of FIG. 4, once the indoor temperature sensor 61 detects that the temperature is 0 ° C. or lower, the microcomputer 10 controls the operation of the electric water supply pump 48 to be prohibited. That is, the detection sensor 44 detects that the temperature of the humidifying dish 40 is equal to or higher than a predetermined temperature.
When the indoor temperature sensor 61 detects 0 ° C. or less, the electric water supply pump 48 is normally operated to supply the water in the water receiving water tank 46 to the humidifying tray 40. Do not drive.

Since there is a possibility that the water in the water receiving water tank 46 is frozen, if the electric water supply pump 48 operates in this frozen state, the pump 48 will break down. This is to prevent this.

Even if the room temperature rises, the prohibition state is maintained until the room temperature sensor 61 detects, for example, 10 ° C. or higher. In other words,
After that, when the indoor temperature becomes, for example, 10 ° C. or higher, the microcomputer 10 controls so as to permit the operation of the electric water supply pump 48.

In place of the indoor temperature sensor 61, a temperature sensor for detecting the temperature of the water receiving water tank 46 or the water in the water tank is provided, and once the temperature sensor detects, for example, 0 ° C. or lower. , For example, the microcomputer 1 so as to prohibit the operation of the electric water supply pump 48 until it becomes 9 ° C. or higher
0 may be controlled. Also according to this embodiment, it is possible to prevent the electric water supply pump 48 from malfunctioning.

Further, in the present embodiment, the heater using the oil burner 13 has been described, but a heater using a gas burner may be used.

Further, although the embodiments of the present invention have been described above, various alternatives, modifications or variations can be made by those skilled in the art based on the above description, and the above-mentioned embodiments are within the scope not departing from the spirit of the present invention. It is intended to cover various alternatives, modifications or variations.

[0031]

As described above, according to the present invention, it is possible to prevent the water supply pump from malfunctioning due to the operation in a state where the water in the water receiving tank received from the water supplying tank is frozen.

[Brief description of drawings]

FIG. 1 is an external perspective view of an oil warm air heater according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the oil warm air heater.

FIG. 3 is a diagram showing a control block diagram.

FIG. 4 is a diagram showing a flowchart.

[Explanation of symbols]

1 oil warm air heater 10 Microcomputer 12 air flow path 18 heat exchanger 31 Hot air blower 40 Humidification dish 46 Water receiving tank 47 Water tank 48 Electric Water Pump

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Fumiaki Sato             1 Otsuki-cho, Ashikaga City, Tochigi Prefecture Sanyo Electric Air Conditioning             Within the corporation F-term (reference) 3L055 AA03 BC10 CA06 DA01

Claims (2)

[Claims] 1. A blower in which a blower flow passage that connects an air inlet and an outlet is formed in a main body case, and a heat exchanger to which combustion hot air is supplied from a combustion unit is arranged in the blower flow passage. By applying the air from the air suction port to the heat exchanger to supply hot air after heat exchange into the room through the outlet, water is supplied into the air flow passage on the leeward side of the heat exchanger. In a warm air heater in which a humidifying tray is provided in which water in a tank is supplied by a water supply pump, and the humidifying water in the humidifying tray is evaporated by the warm air and supplied to the room together with the warm air. A temperature sensor for detecting the temperature in the room, and when the temperature sensor detects a temperature equal to or lower than a first predetermined temperature, control is performed to prohibit operation of the water supply pump until a temperature higher than a second predetermined temperature is detected. A warm air heater characterized by being provided with a control device for controlling. 2. A blower in which a blower flow passage that connects an air inlet and a blower outlet is formed in a main body case, and a heat exchanger to which combustion hot air is supplied from a combustion unit is provided in the blower flow passage. By applying the air from the air suction port to the heat exchanger to supply hot air after heat exchange into the room through the outlet, water is supplied into the air flow passage on the leeward side of the heat exchanger. A humidifying tray is provided in which the water in the water receiving tank received from the tank is supplied by a water supply pump, and the humidifying water in the humidifying tray is evaporated by the warm air and supplied to the room together with the warm air. In a hot air heater, a temperature sensor for detecting the temperature of the water receiving water tank or the water in the water tank, and a second predetermined temperature higher than a first predetermined temperature when the temperature sensor detects a temperature lower than a first predetermined temperature. The operation of the water supply pump is prohibited until it is detected. A warm-air heater equipped with a control device for controlling.