JPH06347042A - Semi-closed type kerosene stove - Google Patents

Abstract

PURPOSE:To enable a sure sensing of a reverse flow of discharged gas by a less-expensive and reliable discharged sensing means and further to stop combustion at a kerosene stove only in the case that there occurs a possibility that a room may be actually contaminated with the discharged gas. CONSTITUTION:A semi-closed type kerosene stove is comprised of a burner 1 for igniting fuel, a combustion chamber 2, a combustion blower 12 for inputting indoor air as its combustion, a heat exchanger 3 connected to the combustion chamber 2, and a chimney 5 connected to the heat exchanger 3. A releasing part 6 is arranged near a connection part between the heat exchanger 3 and the chimney 5. The releasing part 6 is provided with a discharged gas sensing sensor 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention takes in indoor air,
The present invention relates to a so-called semi-closed petroleum stove that discharges combustion gas to the outside.

[0002]

2. Description of the Related Art Conventionally, a burner for burning fuel,
As a semi-enclosed petroleum stove having a combustion chamber, which takes in indoor air as combustion air and discharges exhaust gas from combustion to the outside, one shown in FIG. 5 is known. In the figure, 41 has shown the burner which burns fuel. A combustion chamber 42 is connected to the upper portion of the burner 41, and a heat exchanger 43 that exchanges heat with the indoor air is connected to the combustion chamber 42. Heat exchanger 43
A chimney 45 is connected to the through a chimney connection port 44. The chimneys 45 are connected to each other via chimney joints 48 and are extended to the outside. Reference numeral 46 denotes a combustion blower that takes in indoor air as combustion air, and the taken-in indoor air is pressure-fed in the blower duct 47 and supplied to the burner 41.

In such an apparatus, during combustion, indoor air for combustion is taken in by a blower for combustion 46, is pressure-fed in a blower duct 47, is supplied to a burner 41, and is used for combustion. The combustion gas generated by the combustion in the combustion chamber 42 is sent to the heat exchanger 43. The combustion gas is heat-exchanged with the indoor air by the heat exchanger 43, and is discharged as exhaust gas to the outside by the ventilation force (draft) of the chimney 45.

[0004]

However, the chimney 4
A draft of 5 is normally -0.5 near the chimney connection port 44.
There is only a weak pressure of about 1.0 mmH ₂ O. Therefore, when a back wind from the outdoors is applied to the tip of the chimney 45,
Or when the chamber by use of a ventilation fan or the like has become outdoor relatively negative pressure (-5mmH ₂ O about) against (outdoor), the exhaust gas flows back through the chimney 45 as shown by the white arrows. For this reason, as shown by the solid arrow, the chimney joint 4
8 and the chimney connection port 44 may leak into the room.

In order to deal with such a problem, a carbon monoxide sensor is provided in the room to detect the carbon monoxide concentration in the room,
Although a method of stopping the operation of the device can be considered, generally, the carbon monoxide sensor is expensive and there is a problem in that its reliability is insufficient.

The present invention focuses on such a problem, and in a so-called semi-sealed type oil stove which takes in indoor air and discharges exhaust gas to the outside (outdoors), when exhaust gas flows backward, it is cheap and reliable. This is a semi-sealed oil stove that can detect the exhaust gas immediately by high exhaust gas detection means and stop combustion only when there is a risk that the room will be contaminated by the exhaust gas. The purpose is to provide.

[0007]

The semi-enclosed petroleum stove according to the present invention has a burner for burning fuel and a burner for burning fuel.
A semi-enclosed petroleum stove comprising a combustion chamber, a blower for taking in indoor air as combustion air, a heat exchanger connected to the combustion chamber, and a chimney connected to the heat exchanger, An open part is provided in the vicinity of the connection part between the heat exchanger and the chimney, and an exhaust gas detecting means is provided in the open part.

Another semi-enclosed petroleum stove according to the present invention comprises a burner for burning fuel, a combustion chamber,
In a semi-hermetic oil stove including a combustion blower that takes in indoor air as combustion air, a heat exchanger connected to the combustion chamber, and a chimney connected to the heat exchanger, the heat exchanger An open part is provided in the vicinity of the connection part with the chimney, an exhaust gas detection means is provided in the open part, the output of the exhaust gas detection means is input to the control device, and exhaust gas detection by the exhaust gas detection means is predetermined for a predetermined time. It consists of those which, when continued, stop the combustion of the stove.

[0009]

In such a semi-enclosed petroleum stove, an opening portion to the inside of the room is provided in the vicinity of the connecting portion between the heat exchanger and the chimney, and the exhaust gas detecting means is provided in the opening portion. When exhaust gas flows backward in the chimney when the back wind is applied from the tip of the chimney, that is, when the air is applied to the outside (outdoors) relative to the outside (outdoors) by using a ventilation fan etc. It is detected by the exhaust gas detection means provided in the section.

The exhaust gas detecting means is composed of, for example, a sensor for detecting the temperature. When the exhaust gas flows into the room through the opening, the temperature of the opening rapidly rises. Backflow of exhaust gas is detected quickly and accurately.

Further, in the semi-enclosed petroleum stove according to the present invention, the signal from the exhaust gas detecting means is inputted to the control device so that the combustion is stopped when the exhaust gas is continued for a predetermined time. The operation of the device will not be frequently stopped due to intermittent short-term back wind.

As described above, when the exhaust gas is continuously detected for a predetermined period of time, it is possible to give an alarm by an alarm means such as a buzzer and a display means. Therefore, the user can be made aware that the exhaust gas is in a state where it may leak into the room.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a semi-enclosed petroleum stove according to an embodiment of the present invention. In the figure, 1 indicates a burner for burning fuel. A combustion chamber 2 is connected to the upper portion of the burner 1. The upper part of the combustion chamber 2 is connected to the lower part of one end of a heat exchanger 3 extending in the left-right direction in the figure. At the upper end of the other end of the heat exchanger 3, the chimney connection port 4
And a chimney 5 is connected to the chimney connection port 4.

At the lower end of the other end of the heat exchanger 3, an opening 6 having an opening 6a at the tip is provided. The open portion 6 is provided with an exhaust gas detection sensor 7 as exhaust gas detection means. The open portion 6 is formed of, for example, a flexible tube.

As the exhaust gas detecting sensor 7, it is possible to use temperature detecting means such as a thermistor, a thermocouple, and a temperature switch, and basically any sensor capable of detecting an increase in temperature may be used.

The exhaust gas detection sensor 7 is connected to the control device 8. A display 9 and a buzzer 10 as alarm means are connected to the control device 8. Further, the display of the display 9 can be performed by using a digital display, a light emitting element display, or the like.

At the bottom of the burner 1, there is a combustion air supply port 11
Is provided. A blower duct 13 communicates with the combustion air supply port 11, and the indoor air sucked from the suction port 12a of the combustion blower 12 is pressure-fed in the blower duct 13 to burn from the combustion air supply port 11. Is supplied to the burner 1. Also, 12b
Shows the casing of the blower 12 for combustion.

In the above apparatus, during normal combustion, room air is taken in through the suction port 12a of the combustion blower 12, is pressure-fed in the blower duct 13, and is burned through the combustion air supply port 11 for combustion. Sent to and used for combustion. The combustion gas generated in the combustion chamber 2 is sent to the heat exchanger 3 to exchange heat with the indoor air, and is exhausted as exhaust gas to the outside by the ventilation force (draft) of the chimney 5.

However, the draft generally has a pressure of about -0.5 to 1.0 mmH ₂ O near the chimney connection port 4. Therefore, when a back wind is applied from the tip of the chimney 5, that is, from the outdoors, or when the indoor has a negative pressure relative to the outdoors (outdoors) due to the use of a ventilation fan or the like, the exhaust gas of FIG. As indicated by the solid arrow, there is a risk of backflow in the chimney 5.

The exhaust gas that has flowed back flows into the opening 6 from the chimney 5, or a part of the heat exchanger 3 opens 6.
However, since the exhaust gas detection sensor 7 is provided in the opening portion 6, the backflow of the exhaust gas is immediately detected as follows.

When the exhaust gas flows back to the opening portion 6, the temperature of the portion instantly rises. Therefore, the backflow of the exhaust gas can be detected through the detection of the rising temperature of the open portion 6. Since the temperature detection is sufficient, it is possible to use an inexpensive and highly reliable temperature detection sensor such as a thermistor thermocouple and a temperature switch as the exhaust gas detection sensor 7. The exhaust gas detection sensor 7 is not limited to the above sensor as long as it can detect a temperature rise.

Although a backflow from the outdoors is applied to the tip of the chimney 5 and exhaust gas temporarily flows backward, it is a rare phenomenon that the exhaust gas is polluted indoors for a long time. That is. In the device of the present embodiment, the exhaust gas detection sensor 7 detects the exhaust gas continuously for a predetermined time, that is, only when the interior of the room may be contaminated by the exhaust gas flowing back, the control device 8 is used. Generates a signal and the combustion is stopped.

When the exhaust gas detection sensor 7 detects the exhaust gas continuously for a predetermined period of time, a signal from the control device 8 outputs an alarm from a display 9 as a warning means and a buzzer 10. It Therefore, the user can be made aware that the interior of the room can be contaminated by the backflow of the exhaust gas.

In this embodiment, the display 9 and the buzzer 1
Although 0 is provided as an alarm means and these are used together, it is also possible to selectively use them. Further, either one of the display 9 and the buzzer 10 may be provided.

FIG. 2 shows a semi-enclosed petroleum stove according to another embodiment of the present invention. In this device, the opening 6a of the opening 6 is provided in the vicinity of the suction opening 12a of the combustion blower 12 that takes in indoor air.
When the exhaust gas flows backward in the chimney 5 due to the above reasons, the exhaust gas flows into the opening portion 6 and flows out from the opening port 6a. However, the backflowed exhaust gas is taken in together with the indoor air from the suction port 12a of the combustion blower 12, and is again sent to the burner 1 via the blower duct 13. Therefore, the exhaust gas that flows back is effectively used as combustion air, and the indoor pollution is more reliably prevented.

FIG. 3 shows a semi-enclosed petroleum stove according to still another embodiment of the present invention. In this device, the opening 6 is the casing 12b of the combustion blower 12.
And an opening 6a is provided in the casing 12b. With such a configuration, the same operation and effect as above can be obtained.

FIG. 4 shows a semi-enclosed petroleum stove according to yet another embodiment of the present invention. In this device, the opening 6 is connected to the backflow duct 13 and the opening 6a is provided in the blower duct 13. Blower duct 13
Since the indoor air is constantly pumped by the combustion blower 12 during operation, the positive pressure is about several mmH ₂ O as compared with the room. For this reason, the exhaust gas does not flow backwards when there is some headwind or when a small ventilation fan is used.

However, when a large back wind occurs or when a large ventilation fan is used in a highly airtight house, the pressure before and after the burner 1 is reversed (the upper side of the burner 1 becomes more positive than the lower side). There is a fear. In such a state, the exhaust gas may flow back to the suction port 12a of the combustion blower 12. However, the exhaust gas detection sensor 7 detects this and takes appropriate measures such as stopping the combustion of the stove via the control device 8. Therefore, the above situation is also avoided.

[0029]

As described above, in the case of the semi-enclosed petroleum stove of the present invention, the open portion is provided in the vicinity of the connecting portion between the heat exchanger and the chimney, and the exhaust gas detecting means is provided in the open portion. The backflow of exhaust gas can be reliably detected by the inexpensive and highly reliable temperature detecting means.

Further, since the combustion of the stove is stopped only when the exhaust gas is continuously detected by the exhaust gas detecting means for a certain period of time, only when there is a possibility that the room is actually polluted with the exhaust gas. Appropriate measures can be taken and backflow of exhaust gas into the room can be prevented.

Further, by outputting an alarm by the alarm means, it is possible to surely let the user recognize that the interior of the room is contaminated by the exhaust gas.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a semi-enclosed petroleum stove according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a semi-enclosed petroleum stove according to another embodiment of the present invention.

FIG. 3 is a schematic configuration diagram of a semi-enclosed petroleum stove according to still another embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a semi-enclosed petroleum stove according to still another embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a conventional semi-enclosed petroleum stove.

[Explanation of symbols]

 1 Burner 2 Combustion chamber 3 Heat exchanger 4 Chimney connection port 5 Chimney stack 6 Opening part 6a Opening port 7 Exhaust gas detection sensor 8 Control device 9 Indicator 10 Buzzer 11 Combustion air supply port 12 Combustion blower 12a Suction port 12b Casing

Claims (9)

[Claims] 1. A burner for burning fuel, a combustion chamber,
In a semi-hermetic oil stove including a combustion blower that takes in indoor air as combustion air, a heat exchanger connected to the combustion chamber, and a chimney connected to the heat exchanger, the heat exchanger A semi-enclosed petroleum stove characterized in that an open portion is provided in the vicinity of the connection portion with the chimney, and an exhaust gas detection means is provided in the open portion. 2. The semi-enclosed petroleum stove according to claim 1, wherein the exhaust gas detecting means comprises a temperature detecting means selected from a thermistor, a thermocouple, and a temperature switch. 3. The semi-enclosed petroleum stove according to claim 1, wherein the opening portion is opened near a suction port of a combustion blower. 4. The opening portion is connected to a casing of a blower for combustion and is opened inside the casing.
Or 2 semi-closed petroleum stoves. 5. The semi-enclosed petroleum stove according to claim 1, wherein the opening portion is connected to a blower duct for blowing combustion air from the combustion blower to the combustion portion of the stove and is opened in the duct. 6. A burner for burning fuel, a combustion chamber,
In a semi-hermetic oil stove including a combustion blower that takes in indoor air as combustion air, a heat exchanger connected to the combustion chamber, and a chimney connected to the heat exchanger, the heat exchanger An open part is provided in the vicinity of the connection part with the chimney, an exhaust gas detection means is provided in the open part, the output of the exhaust gas detection means is input to the control device, and exhaust gas detection by the exhaust gas detection means is predetermined for a predetermined time. A semi-enclosed petroleum stove characterized by stopping combustion of the stove when continued. 7. An alarm means is provided for outputting an alarm when the exhaust gas detection is continued for a certain period of time.
Semi-sealed oil stove. 8. The semi-enclosed petroleum stove according to claim 7, wherein the alarm means comprises a display means. 9. The alarm means comprises a buzzer.
Semi-sealed oil stove.