JPS6123264Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention controls the room temperature based on room temperature information sent from a wireless room temperature sensor, and when the room temperature reaches an abnormally high temperature, the combustion engine is guided to extinguish the fire. Concerning improvements to hot air heaters.

In conventional combustion-type hot air heaters, such as kerosene stoves, the room temperature sensor that detects the room temperature is connected to the control system of the heater body with a lead wire or cord, and is not attached directly to the heater body. , the cord was extended and fixed to a specific location in the room that was to be heated. However, in the case where the room temperature sensor is directly attached to the heater body, the combustion heat is transmitted through the case of the heater body and has a considerable influence on the room temperature sensor, so there is a drawback that accurate room temperature sensing cannot be performed. In this regard, a room temperature sensor that is connected to the combustion control system by a cord and fixed at a specific location has the advantage of not being directly affected by combustion heat, but requires a specialized worker to install the cord. Furthermore, because the area in which the cord can be installed is limited depending on the structure of the building, there is a risk that the cord may be installed in an inappropriate location as a room temperature sensing location. Assuming that these defects have been removed, a transmitter is attached to the room temperature sensor, and the transmitter sends room temperature information as radio waves to the main unit, which receives the radio waves and controls combustion based on the received information. Things are being thought of. According to the so-called wireless room temperature sensing system having the above configuration, the room temperature sensor can be installed at any location, so it can be installed at the most appropriate location for room temperature sensing. However, in the above-mentioned wireless room temperature sensing method, the sensor can be moved and installed at any time by the user of the heater. In fact, there is a possibility that the sensor may be moved to an unfavorable location for sensing room temperature. For example, a room temperature sensor may be installed in a location where it is directly exposed to hot air sent out from a heater. In such a case, the room temperature cannot be detected accurately, which naturally leads to inaccurate room temperature control, and the hot air heater is configured to automatically extinguish the fire in response to abnormal room temperature information from the room temperature sensor. average room temperature (temperature averaged from each point in the room)
Even though the level of combustion is low, the combustion will be stopped.

This idea was created taking these circumstances into consideration, and its purpose is to extinguish the combustion equipment only when the room temperature becomes truly abnormally high, regardless of where the wireless room temperature sensor is installed. It is an object of the present invention to provide a combustion type hot air heater in which the room temperature is stably controlled in accordance with the room temperature information from the sensor.

The details of this invention will be clarified below with reference to embodiments shown in the drawings. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of this invention, where A is a wireless room temperature sensor, and B is a combustion control section of the main body of a combustion type hot air heater.

The temperature sensing element 1 in the room temperature sensor A is an element that detects the indoor temperature and sends out the temperature information,
The transmitter 2 transmits the temperature information sent from the temperature sensing element 1 onto a carrier wave and radiates it as a radio wave from the antenna 3.

The receiver 5 in the combustion control section B has an antenna 4
The signal converter 6 detects and amplifies the radio waves received by the room temperature sensor A and extracts the temperature information sent from the room temperature sensor A, and the signal converter 6 converts the temperature information extracted by the receiver 5 into a predetermined temperature signal. It is something that converts.
The controller 7 has a built-in microcomputer, for example, and sends out a predetermined control signal in response to the temperature signal input from the converter 6 and an abnormal signal from an abnormal temperature detector 8, which will be described below. . The abnormal temperature detector 8 consists of a temperature-sensitive resistance element or a gas-filled temperature-sensitive element attached to the heater body, and sends an output signal when the room temperature reaches the abnormality detection temperature T ₁ (for example, 35°C). do. The response section 9 is a switch, relay, etc. for igniting, burning, extinguishing, blowing air, etc. of the combustion machine, and performs combustion control, blowing control, etc. in accordance with the control signal from the controller 7.

FIG. 2 is a diagram schematically showing an example of the internal configuration of the controller 7 and the response section 9. As shown in FIG. As is clear from FIG. 2, the controller 7 includes a room temperature control circuit 1 which operates in response to the temperature signal _S0 from the signal converter 6.
1. An upper limit level detector 12 that operates when the temperature signal S ₀ exceeds the upper limit level, a CFF control circuit 13 that responds to the abnormal signal S ₁ from the abnormal temperature detector 8, etc. are provided. On the other hand, in the response section 9,
A combustion air blow control circuit 14 that variably controls the opening degree of the fuel supply solenoid valve and the operating state of the hot air blower in response to the output signal from the room temperature control circuit 11 is activated by the output signal from the upper limit level detector 12. an alarm device 15 such as an alarm lamp or buzzer;
It is equipped with a safety circuit 16 etc. that operates in response to an output signal from the CFF control circuit 13 and guides the combustion machine to extinguish the fire.

Next, the operation of the heater of the present invention constructed as described above will be explained with reference to the waveform diagram shown in FIG. 3. First, the operation when the room temperature sensor A is installed at an appropriate position in the room to be heated will be explained. The room temperature information detected by the temperature sensing element 1 is
The signal is placed on a carrier wave by the transmitter 2 and radiated into the air via the antenna 3. The above radio waves are caught by an antenna 4, detected and amplified by a receiver 5, and become temperature information. This temperature information is converted into a predetermined signal by the signal converter 6 and inputted to the controller 7 as a temperature signal _S0 .

Now, as shown in FIG. 3, if the room temperature at time t ₀ is below the set temperature T ₀ , the corresponding temperature signal S ₀ is input to the controller 7, so the temperature control circuit 11
Strong combustion and strong airflow control commands are sent from the Therefore, the combustion air blowing control circuit 14 of the response section 9 is activated.
The combustion machine is brought into a strong combustion state, and the amount of hot air blown is set to a strong amount. When the room temperature exceeds the set temperature at time _t1 , the corresponding temperature signal _S0 is input to the controller 7, so the room temperature adjustment circuit 11 sends out weak combustion and weak air blow control commands, and the combustion air blow control circuit 14 Combustion is controlled by switching to a weak air flow rate.

In this way, the room temperature is controlled within a predetermined temperature range around the set temperature T ₀ based on the temperature information from the room temperature sensor A.

Now, suppose that the room temperature rises abnormally at time _t4 and exceeds the upper limit level _T1 , which is the abnormality detection temperature. Then, a signal is sent from the upper limit level detector 12 of the controller 7, the alarm 15 is activated, the abnormal temperature detector 8 is activated, and an abnormal signal _S1 is given to the OFF control circuit 13 of the controller 7. Therefore, the OFF control circuit 13 is activated and a fire extinguishing command is sent to the safety circuit 16 of the response section 9. Therefore, the safety circuit 16 shifts the combustor to the extinguished state.

Next, the operation when the room temperature sensor A is installed in a place where it is directly exposed to hot air will be explained.
In such a case, the room temperature sensor A will send out temperature information indicating that the room temperature is at a high temperature level, even though the average room temperature is relatively low. Therefore, the operation of the combustion control section B based on the temperature information from the room temperature sensor A is basically the same as the operation described above, but
In terms of the response level, the operation occurs when the set level T ₀ and the upper limit level T ₁ are apparently lowered by a certain level, as shown by symbols T ₀ ' and T ₁ ' in FIG. Therefore, at time _t3 , the temperature signal _S0 becomes a signal when the room temperature exceeds the upper limit level _T1 '. Therefore, the upper limit level detector 12 will send out an output signal. Therefore, it becomes clear that the alarm 15 is activated and the room temperature sensor A is detecting a high temperature.

However, the abnormal temperature detector 8 attached to the heater body sends out an output when the room temperature exceeds the upper limit level _T1 , and the room temperature level at this time is
At T ₁ ′, the abnormal signal S ₁ is not sent. Therefore, the OFF control circuit 13 does not operate. Therefore, the safety circuit 16
is inactive and the burners are not directed to extinguish the fire.

In this way, if the combustion operation continues normally despite the alarm 15 being activated, this indicates that only the room temperature sensor A is placed at a high temperature. In other words, it can be said that the installation location of the room temperature sensor A is inappropriate. Therefore, in such a case, it is desirable to change the installation location of the room temperature sensor A to an appropriate location.

However, the present invention is not limited to the above-mentioned embodiment. For example, in the above-mentioned embodiment, the room temperature abnormality detector 8 is operated independently of the temperature information from the room temperature sensor A.
The abnormality signal _S1 from the controller 7
The case where the OFF control circuit 13 is operated to operate the safety circuit is shown, but the output signal of the upper limit level detector 12 is turned on by the abnormality signal _S1 from the room temperature abnormality detector 8 via a switch that closes the safety circuit 1.
6, the fire extinguishing operation may be performed by AND outputting the temperature information of the room temperature sensor A that exceeds the upper limit level and the signal _S1 from the room temperature abnormality detector 8. Of course, various other modifications can be made without departing from the spirit and scope of this invention.

As explained above, according to the present invention, the room temperature abnormality detector is provided in the heater body separately from the wireless room temperature sensor, and the combustion stop operation is not performed based on the room temperature information from the wireless room temperature sensor, and the room temperature abnormality is detected. Since the combustion equipment is configured to stop combustion based on an abnormal signal from the combustion equipment, the combustion equipment will not be extinguished even if the wireless room temperature detector is installed near the hot air outlet. Therefore, unless the room temperature becomes truly abnormally high and the abnormal temperature detector sends out an abnormal signal, the fire will not be easily extinguished, the operation will be stable, and safety will be ensured. As described above, according to the present invention, it is possible to provide a combustion type hot air heater that has special advantages not found in the past.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, Fig. 2 is a diagram showing a specific example of the controller and response section of the embodiment, and Fig. 3 is for explaining the operation of the embodiment. FIG. A... Room temperature sensor, B... Combustion control circuit of the heater body, 1... Temperature sensing element, 2... Transmitter, 3...
Transmitting antenna, 4... Receiving antenna, 6... Signal converter, 7... Controller, 8... Room temperature abnormality detector,
9...Response department.

Claims (1)

[Scope of utility model registration request] A heater body, a room temperature abnormality detector provided on the body, a wireless room temperature sensor installed at a predetermined location in the room heated by the heater body and transmitting room temperature information to the body via radio waves, and a wireless room temperature sensor that transmits room temperature information to the body by radio waves. A temperature signal forming section is provided in the heater body to receive the radio waves coming from the sensor and obtain a temperature signal, and the combustion amount and air blowing amount of the combustor are determined based on the temperature signal formed by this temperature signal forming section. a controller that sends out a command to change the temperature, etc., and also sends out a fire extinguishing command to stop combustion in the combustor based on an abnormal signal from the abnormal temperature detector, and the amount of combustion from this controller. , a combustion system characterized by comprising a response unit that controls changes in the combustion amount, air flow, etc. of the combustor in response to a command to change the air blown amount, etc., and also controls extinguishing of the combustor in response to the extinguishing command. Hot air heater.