JPH039384B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion type heating device that heats a room by burning fuel such as gas or kerosene.

[Prior Art] When installing this type of heating device, the heating device is selected and installed in consideration of the size of the room in which it will be used and the rated combustion amount.

However, when the room is cold during the winter, even if the room is heated with the rated combustion amount, the room temperature rises slowly and it takes a long time to warm up the room.

Therefore, there is a demand for a combustion-type heating system that can heat the room more rapidly than conventional combustion-type heating systems by increasing the amount of combustion in the burner than the rated combustion amount only during a predetermined period of time at the initial stage of ignition. be.

[Problems to be solved by the invention] However, if a room is rapidly heated for a predetermined period of time with a combustion amount larger than the rated combustion amount, the temperature inside the room may rise too much and cause discomfort to the user. be.

Therefore, it is conceivable to set a stop condition for stopping the rapid heating operation, and to stop the rapid heating operation in response to a rise in room temperature or an operation by the user.

However, some users operate the rapid heating setting switch, etc. during the rapid heating operation to change the setting state of the rapid heating, or stop the rapid heating operation. After that, the rapid heating may be set again.

On the other hand, in a combustion type heating device, the combustion state is not stable for a certain period of time immediately after ignition.

For this reason, if rapid heating is repeatedly switched in the initial stage of ignition, the combustion state immediately after ignition will not be stable, resulting in incomplete combustion.

The present invention was made in view of the above circumstances, and
The purpose is to provide a combustion type heating device that has a function to stop the rapid heating operation when a rapid operation stop condition is established during the rapid heating operation at the initial stage of ignition, and is capable of stabilizing the combustion state immediately after ignition in a short period of time. It is in.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a combustion type comprising a burner that burns fuel and a combustion amount control device that controls the amount of fuel burned in the burner. In the heating device, the combustion amount control device starts a rapid heating operation in which the combustion amount in the burner is made larger than the rated combustion amount when a rapid heating start condition is established within a predetermined time period at the initial stage of ignition. , when the rapid heating stop condition is satisfied during the rapid heating operation, the rapid heating operation is stopped, and even if the rapid heating start condition is satisfied within the predetermined time after the rapid heating operation is stopped, The technical means is not to perform the rapid heating operation.

[Operation and Effects of the Invention] The present invention having the above configuration performs a rapid heating operation in which the combustion amount in the burner is made larger than the rated combustion amount when a predetermined rapid heating start condition is established. to rapidly heat the room.
Then, during this rapid heating operation, when a preset arbitrarily set rapid heating stop condition is satisfied, the rapid heating operation is stopped. Thereafter, even if the rapid heating start condition is met again within a predetermined period of time, the combustion amount control device does not perform the rapid heating operation.

As a result, the rapid heating operation is stopped due to a rise in the room temperature during the rapid heating operation or a rapid heating stop condition such as a user's operation, so the user does not feel uncomfortable due to the rise in the room temperature. The rapid heating operation can be stopped according to the user's will.

In addition, even if the rapid heating operation stop condition is met within a predetermined period of time at the initial stage of ignition after rapid heating operation is stopped, rapid heating operation will not be performed, so the combustion state immediately after ignition can be stabilized in a short time. .

[Example] Next, a combustion type heating device of the present invention will be described based on an example shown in the drawings.

FIG. 1 shows a schematic configuration diagram of a gas combustion hot air heating device to which the present invention is applied.

The gas combustion hot air heating device of this embodiment is an indoor open type (generally called a gas fan heater) that burns air sucked in from the room and blows out the combustion gas indoors again.

This gas combustion hot air heating device includes a combustion air circulation path 10 that introduces indoor air, combusts the introduced air, and blows combustion gas back into the room, and a combustion air circulation path 10 that supplies gas to the combustion air circulation path 10. A combustion amount control device 30 controls the combustion air circulation path 10 and the gas supply path 20 to control the amount of gas burned.

The above-mentioned combustion air circulation path 10 includes an indoor air intake port 12 equipped with an air filter 11 that introduces air from inside the room, and an indoor air intake port 12 that sucks air from the indoor air intake port 12, and the air and combustion gas in the combustion air circulation path 10. a blower 13 for causing a flow of gas; a gas mixing chamber 14 for mixing air and gas; and a gas mixing chamber 14 for mixing air and gas.
a gas burner 15 that burns gas above the
a mixing chamber 16 for mixing the combustion gas combusted by the gas burner 15 and indoor air;
The hot air outlet 17 blows out the heated air as hot air.

The gas supply path 20 includes a gas jet nozzle 21 that jets gas into the gas mixing chamber 14 of the combustion air circulation path 10, a gas supply pipe 22 that guides the gas to the gas jet nozzle 21, and an upstream side of the gas supply pipe 22. A main valve 23 is provided on the side and is opened and closed by energization and de-energization, a safety valve 24 is provided downstream of this main valve 23 and is opened and closed by energization control like the main valve 23, and a safety valve 24 is provided downstream of this safety valve 24. , a governor valve 25 that regulates the gas pressure; a proportional control valve 26 that is provided downstream of the governor valve 25 and whose opening degree varies depending on the amount of electricity supplied; and a proportional control valve 26 that performs proportional control regardless of whether the proportional control valve 26 is opened or closed. Gas jet nozzle 2 from upstream of valve 26
A flow rate adjustment screw 27a that allows a certain amount of gas to flow out to 1.
a first gas bypass 27 having , a rapid heating valve 29 that is opened and closed by energization control, and when the proportional control valve 26 is fully opened, the amount of gas burned in the gas burner 15 becomes the rated combustion amount, and the proportional control valve 26 is fully opened. When the rapid heating valve 29 is opened, the combustion amount of gas in the gas burner 15 is set to be larger than the rated combustion amount by, for example, ten or more percent.

The combustion amount control device 30 includes an operation switch 31 that is operated by the user and sets the start and stop of the gas combustion hot air heating device, and a room temperature setting means (for example, a temperature control volume) 32 that is set by the user. , a room temperature detection means (for example, a thermistor) 33 that detects the indoor temperature, and a thermocouple 3 that detects the combustion state of the flame above the gas burner 15.
4. Display means for inputting signals from the operating switch 35, etc., which are operated by the user to set and cancel rapid heating, and displaying the setting state of the operation switch 31, the setting state of the operating switch 35, etc. to the user. 3
6, an ignition electrode 37 that causes sparks to fly on the combustion surface of the gas burner 15, the blower 13, the main valve 23,
It controls energization of the safety valve 24, the proportional control valve 26, the rapid heating valve 29, etc. Note that the combustion amount control device 30 of this embodiment is an electronic control device using a microcomputer, and when the device is plugged into a commercial power source (not shown), It receives electricity without any need for electricity.

Next, the main control portion by the combustion amount control device 30 according to the present invention will be explained based on the flowchart of FIG. 2.

When the operation switch 31 is turned on and heating operation is started, in step S1, the output of the thermocouple is 12 mV or more (ignition detected), and the indoor temperature detected by the room temperature detection means 33 is set by the room temperature setting means 32. the first set temperature (for example, 5°C) lower than the set temperature set,
Furthermore, it is determined whether all conditions for starting rapid heating, such as rapid heating being selected by the operation switch 35, are satisfied.

If the judgment result is NO, in step S2, normal heating operation is performed without performing rapid heating operation, and then in step S3, whether or not the heating operation is within a predetermined time (for example, within 15 minutes) after the start of heating operation is performed. make that judgment. If the judgment result is NO, the process returns to step S1, and if the judgment result is YES, normal heating operation is performed in step S4.

Also, if the judgment result in step S1 is YES,
In step S5, it is determined whether it is within a predetermined time (for example, within 15 minutes) after the start of the heating operation. If this judgment result is NO, step S4
If the judgment result is YES, in step S6, the proportional control valve 26 is fully opened, and
The rapid heating valve 29 is opened and the blower 13 is operated at Maxim to perform rapid heating operation.

Subsequently, in step S7, the indoor temperature detected by the room temperature detection means 33, which is a rapid heating stop condition, is set to a second set temperature (for example, 2° C.) lower than the set temperature set by the room temperature setting means 32. higher than the specified temperature, or the operation switch 3
5, it is determined whether the rapid heating is canceled or not. If the judgment result is NO, the process returns to step S5, and if YES, the process proceeds to step S4.

As shown in the above embodiment, at the start of operation or within a predetermined period of time immediately after the start of operation, rapid indoor heating operation is performed depending on the indoor conditions and the user's intention, so that the user's intention can be accommodated. It can quickly heat a cold room.

In addition, since the rapid heating operation is stopped when the room temperature rises during the rapid heating operation or by the user's operation, the user does not feel uncomfortable due to the rise in the room temperature, and it is possible to do so according to the user's will. Rapid heating operation can be stopped.

Furthermore, even if the rapid heating operation stop conditions are met within a predetermined period of time immediately after the start of the operation after the rapid heating operation is stopped,
Since rapid heating operation is not performed, the combustion state immediately after ignition can be stabilized in a short period of time, and incomplete combustion etc. can be prevented from occurring.

It goes without saying that the rapid heating operation will be started if the rapid operation stop conditions are met when the heating operation is restarted after the heating operation is stopped.

As a means to increase the combustion amount of the burner beyond the rated combustion amount, we used a bypass that bypasses the proportional control valve and a valve that opens and closes this bypass. This may be done by other means.

Although an example is shown in which a computer is used as the combustion amount control device, an analog electric circuit using a transistor, an operational amplifier, etc. may be used.

In addition, in this embodiment, an indoor open-type combustion heating device is shown, which burns the air sucked in from the room and blows the combustion gas back into the room. It may be applied to a FF combustion heating device that releases gas outdoors or a combustion heating device that incorporates a refrigeration cycle.

Further, although an example in which gas is used as the fuel has been shown, the present invention may also be applied to a heating device that burns other fuels such as kerosene.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a gas combustion hot air heating device, and FIG. 2 is a flowchart showing the main parts of the present invention programmed into the combustion amount control device. In the figure, 15...burner, 30... combustion amount control device, 32... room temperature setting means, 33... room temperature detection means, 35... operation switch.

Claims (1)

[Scope of Claims] 1. A combustion heating device comprising a burner that burns fuel and a combustion amount control device that controls the amount of fuel burned in the burner, wherein the combustion amount control device is configured to When a rapid heating start condition is satisfied within a predetermined time, a rapid heating operation is started in which the combustion amount in the burner is made larger than the rated combustion amount, and during the rapid heating, a rapid heating stop condition is satisfied. Sometimes, the rapid heating operation is stopped, and within the predetermined time after the rapid heating operation is stopped,
A combustion type heating device characterized in that the rapid heating operation is not performed even if the rapid heating start condition is satisfied.