JPH0233566A - Hot air heater - Google Patents

Abstract

PURPOSE:To enable sharp quickening of the rise of a room temperature by a method wherein when, during the starting of operation, a room temperature is below a given value, a proportional value current increasing means is energized only for a given time, and the value of a current flowing through a proportional valve is increased by a given value from a rated output value. CONSTITUTION:During the starting of operation, a room temperature is below a given temperature T programmed by a microcomputer 1 or temperature TA set arbitrarily by a user, a proportional valve current increasing means 14 is energized by means of a timer means 22, a current flowing through a gas proportional valve 13 is increased to increase the feed of fuel to a burner, and operation is performed by means of a heating output Kalpha. Meanwhile, when a room temperature exceeds the given temperature T or the temperature TA, temperature is controlled so that temperature is adjusted to a set temperature TS by means of an output in a rated output range. After operation is started by means of the output Kalpha, after elapse of a given time talpha, the action of the proportional current increase means 14 is stopped by means of a timer means 22, and temperature is controlled in an ordinary rated output range.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a room temperature control device for a hot air heater.

BACKGROUND OF THE INVENTION Conventionally, the heating output of a hot air heater equipped with a gas proportional valve was controlled by changing between a rated maximum output and a rated minimum output depending on the heating load.

Therefore, at the beginning of operation, since the room temperature is lower than the set temperature, the heating output starts at the rated maximum output, and when the room temperature reaches the set temperature, the heating output starts at the rated minimum output.

General problems that the invention aims to solve (In the conventional hot air heaters mentioned above, the speed at which the room temperature rises is determined by the rated maximum output of the appliance, and it is difficult to warm up the room quickly on a cold morning, in the bitter cold, or when returning home from outside) However, it took some time and was inconvenient in terms of usability.

In view of the above-mentioned problem, the present invention has been developed to significantly reduce the rise in room temperature by operating the appliance beyond its rated output value only for a predetermined period of time at the start of operation, such as on a cold morning, during severe cold weather, or when returning home after going out. This allows the user to determine the room temperature at the start of operation by setting the desired temperature.

Means for Solving the Problems In order to achieve the second object, the hot air heater of the present invention includes a room temperature detection means for detecting the indoor temperature, a room temperature setting means for setting the indoor temperature, and the above-mentioned room temperature setting means. A combustion amount calculation means that outputs a voltage signal corresponding to the required combustion output according to the room temperature set in and a signal from the room temperature detected by the room temperature detection means, and a proportional valve that outputs a voltage signal from the combustion amount calculation means. A voltage-current conversion means converts the current flowing through the coil into a current flowing through the coil (a proportional valve that controls the amount of fuel supplied to the burner accordingly), and determines whether the room temperature is below a predetermined temperature at the start of operation. a room temperature determination means at the start of operation; a room temperature determination correction means for arbitrarily sending an input signal to the room temperature determination means at the start of operation;
correction temperature storage means for reading and storing the signal inputted by the room temperature determination correction means; and a signal from the room temperature determination means at the start of operation; and a proportional valve current that increases the current flowing through the proportional valve by a predetermined value from the rated output. This configuration includes an increasing means and a timer means for operating the proportional valve current increasing means for a predetermined period of time.

According to the above-described configuration, the present invention operates the proportional valve current increasing means for a predetermined time using the timer means when the room temperature is below a predetermined temperature at the start of operation on a cold morning or when returning home from going out. The current value flowing through the proportional valve f is increased by a predetermined value from the rated output value, and as a result, the output of the hot air heater is increased by a predetermined value from the rated maximum output, and the rise in room temperature is significantly increased. Here, at the start of operation, the room temperature setting for operating the proportional valve current increasing means is set by the manufacturer based on many materials, but it may vary depending on regional differences and differences between practitioners. However, it is not possible to satisfy the needs of all users.Here, the user can use the room temperature judgment correction means to set the temperature according to his/her own preferences, and then manually memorize and operate the temperature. Become.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

In Fig. 1, 1 is a microcomputer, and a CPU
It is a so-called one-chip microcomputer having , ROM, RAM, and an input/output section, and the operation sequence of the warm air heater is programmed and built-in. Reference numeral 2 denotes a room temperature detection means consisting of an electronic circuit including a thermistor, and 3 a room temperature setting means, the output signal of which is inputted together with the signal output from the room temperature detection means 2 (this is input to the gas amount calculation means 4f in the microcomputer 1). Gas amount calculation means 4: Calculates the amount of gas required for the set room temperature and room temperature signals and outputs a voltage signal. 5 is a voltage-current conversion means as described above.
It converts the voltage signal from the gas amount calculating means 4 into a light signal that flows through the gas proportional valve 131.

To explain its internal configuration, reference numeral 6 constitutes a voltage follower by an operational amplifier, and a non-inverting input terminal of an operational amplifier 7 is connected to the voltage follower. 8 is a resistor that limits the output current of the operational amplifier 7 to protect the output terminal, 9 is a bias resistor for the transistor 11, and 10 is a resistor that controls the gas proportional valve 1.
31 generates a voltage proportional to the current flowing through the resistor 12
It is connected to the inverting input terminal of the operational amplifier 7 through the inverting input terminal of the operational amplifier 7. Therefore, the operational amplifier 7 operates as a positive phase amplifier,
The voltage at the output terminal increases until the voltage at the non-inverting input terminal and the voltage at the inverting input terminal become equal, and as a result, the pace current of the transistor 11 is increased and the current flowing through the proportional valve 13i is increased. The proportional valve 13 is connected to the burner 1 (not shown).
This controls the amount of gas supplied. The burner also heats the heat exchanger, warms the air sent by the convection fan, and blows it out from the outlet. Then, when the voltage generated across the resistor 10 enters the inverting input terminal via the resistor 12 and becomes equal to the voltage at the non-inverting input terminal (this is when the voltage at the output terminal stops rising and this state is maintained). 14 is a proportional valve current increasing means, which is connected to the signal from the microcomputer 1 through plow resistors 15 and 16 of the transistor 18.

A resistor 17 is connected in parallel to the series circuit of the resistors 10 and 12 of the voltage-current converting means 5 when the transistor 18 is turned ON. As a result, the voltage at the inverting input terminal of the operational amplifier 7 decreases, and the current flowing through the gas proportional valve 13 further increases. Reference numeral 19 denotes room temperature determination means at the start of operation, which determines whether the room temperature detected by the room temperature detection means 2 at the start of operation is below a predetermined temperature, and if it is below, operates the proportional valve current increase means 14. let However, this temperature is set by the manufacturer, and the user can use the room temperature determination correction means 20 to set and input a temperature that suits his or her preference. The signal inputted by the room temperature determination correction means 20 is stored in the corrected temperature storage means 21 and becomes a priority signal. Reference numeral 22 denotes a timer means that operates the proportional valve current increasing means 14 for a predetermined period of time.

FIG. 2 shows the operation flow of an embodiment of the present invention, and FIG. 3 shows changes in output and temperature over time.

At the start of operation, if the room temperature is lower than the predetermined temperature T programmed into the microcomputer 1 or the temperature TA arbitrarily set by the user, as shown in FIGS.
The proportional valve current increasing means 14 is controlled by the timer means 22 shown in FIG.
is operated to increase the current flowing through the gas proportional valve 13 to increase the fuel supply to the burner, and the heating output is operated at α as shown by curve B in FIGS. 3a and 3b. On the other hand, if the room temperature is higher than the predetermined temperature T or TA, temperature control is performed so that the set temperature Tsi is reached at an output within the rated output range, as shown by curve A in FIG. 3a. After starting operation at the output α, the timer means 22 stops the operation of the proportional valve current increasing means 14 after a predetermined time tα, and the temperature is controlled within the normal rated output range.

According to the configuration of the above embodiment, at the start of operation, if the room temperature is below a predetermined temperature, the proportional valve current increasing means 14 is operated by the timer means 22+ for a predetermined time tα to increase the heating output from the rated maximum output Km to α. As a result, the room temperature rises at time t1. in Fig. 4 a and b. For every t1' (rise of the room temperature corresponding to FIG. 3), it is possible to make the time t8, tB' earlier than the conventional time t2, t2'.

In addition to the effects of the invention, as is clear from the examples, the present invention operates the proportional valve current increasing means for a predetermined period of time to increase the current value flowing through the proportional valve if the room temperature is below a predetermined temperature at the start of operation. Since the output is increased by a predetermined value from the rated output value, it is possible to increase the output of the hot air heater by a predetermined value from the rated maximum output, thereby significantly speeding up the temperature rise of the room temperature.

Therefore, it is possible to quickly warm up the room on a cold morning, when it is extremely cold, or when returning home after going out. This makes it possible to realize a warm air heater.

[Brief explanation of the drawing]

Fig. 1 is a circuit configuration diagram showing an embodiment of the present invention, Fig. 2 is an operation flow diagram showing an embodiment of the invention, and Figs. 3 and 4 explain temporal changes in heating output and temperature. Show the graph. 1...Microcomputer, 2...
Room temperature detection means, 3...Room temperature setting means, 4...
gas amount calculating means, 5... Voltage-current converting means, 13... Gas proportional valve, 14... Proportional valve current increasing means, 19... Room temperature determination means at the start of operation, 20...Room temperature determination correction means, 21...
. . . Correction temperature storage means, 22 . . . Timer means. Name of agent: Patent attorney Shigetaka Awano (1 person)

Claims (1)

[Claims] a hot air generating means for exchanging combustion heat of the burner and blowing out hot air by a convection fan; a room temperature detecting means for detecting the indoor temperature; a room temperature setting means for setting the indoor temperature; and a room temperature setting means for setting the indoor temperature. combustion amount calculation means for outputting a voltage signal corresponding to the required combustion output based on the room temperature and the signal from the room temperature detected by the room temperature detection means; Voltage to convert -
a current conversion means, a proportional valve that controls the amount of fuel supplied to the burner according to the current value flowing through the coil, a room temperature determination means at the start of operation that determines whether the room temperature is below a predetermined temperature at the start of operation; room temperature determination correction means for arbitrarily sending an input signal to the room temperature determination means at the start of operation; correction temperature storage means for reading and storing the signal input by the room temperature determination correction means; and a signal from the room temperature determination means at the start of operation. A hot air heater comprising: proportional valve current increasing means for increasing the current flowing through the proportional valve by a predetermined value from the rated output; and timer means for operating the proportional valve current increasing means for a predetermined period of time.