NL8500889A - Protection device for a stove, in particular a petroleum stove. - Google Patents

Protection device for a stove, in particular a petroleum stove. Download PDF

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Publication number
NL8500889A
NL8500889A NL8500889A NL8500889A NL8500889A NL 8500889 A NL8500889 A NL 8500889A NL 8500889 A NL8500889 A NL 8500889A NL 8500889 A NL8500889 A NL 8500889A NL 8500889 A NL8500889 A NL 8500889A
Authority
NL
Netherlands
Prior art keywords
sensor
security
actuator
height
burner
Prior art date
Application number
NL8500889A
Other languages
Dutch (nl)
Original Assignee
Johannes Martinus Minten En Hu
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johannes Martinus Minten En Hu filed Critical Johannes Martinus Minten En Hu
Priority to NL8500889A priority Critical patent/NL8500889A/en
Priority to NL8500889 priority
Publication of NL8500889A publication Critical patent/NL8500889A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24COTHER DOMESTIC STOVES OR RANGES; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C5/00Stoves and ranges for liquid fuels
    • F24C5/16Arrangement and mounting of control and safety devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23NREGULATING OR CONTROLLING COMBUSTION
    • F23N5/00Systems for controlling combustion
    • F23N5/003Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F23N5/006Systems for controlling combustion using detectors sensitive to combustion gas properties the detector being sensitive to oxygen

Description

-1- 24606 / JF / tv * <t

Short designation: Protection device for a stove, in particular a kerosene heater.

The invention relates to a safety device 5 for a stove of the type in which, during normal operation, the height of flames produced by the stove and / or from where a heating element becomes hot is outside a certain range, which characterizes an undesired operating condition.

In particular, the present invention relates to a petroleum heater.

In addition to the conventional types of petroleum stoves, several more modern types are now on the market, including a type with a first, incomplete combustion at, for example, 800 ° C and a second combustion at, for example, 1200 ° C, in which waste gases are burned.

In the latter type no measurable generation of carbon monoxide takes place. This type is therefore preferable for the environment and the safety of the user.

However, the stated advantages of this type of kerosene heater are only valid if the burner is correctly adjusted, including the setting height of the wick and the presence of oxygen. In most cases, the stocking is adjusted manually.

Both too low and too high a stocking results in an abnormal burning of the stove, resulting in the formation of soot and / or odor. In the first case, the burner does not heat up to the full height before the first combustion and in the second case, the flames developed in the burner for the second combustion are too large.

The above-mentioned drawbacks therefore occur if the stocking height is incorrectly adjusted.

An abnormal burning can also occur with a correctly set stocking, that is to say a burning with a smaller than minimum flame in the burner for the second combustion, also referred to as top burner. This can be the case if the stocking is set correctly, but there is not enough oxygen. Carbon monoxide could be generated in this abnormal burning. This can also be a disadvantage.

The invention contemplates one or more of the above-mentioned drawbacks

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., -2-24606 / JF / tv and / or other drawbacks of known heaters and provides for this purpose a protection device of the type mentioned in the preamble, characterized in that it comprises a sensor member for sensing said height (s) and its out-of-range range, providing a representative detection signal therefor and an actuator means for placing or decommissioning the heater in response to the detection signal in a desired operating condition.

The safety device according to the invention therefore advantageously comprises a sensor member with one or more sensors for detecting one or more of the following conditions in a petroleum stove with two-stage combustion: flames that are too low, flames that are too high, that heat is too low over a height. the burner for the first combustion. It should be noted here that the sensor for the latter condition will be placed relatively high relative to the lower burner. In a type 15 kerosene heater with a single burner corresponding to the lower burner just mentioned, the sensor will be positioned relatively low with respect to that burner.

According to the invention, the undesired operating state, ie the operation of the stove in the presence of too little oxygen and the operation of the stove in such a way that soot and / or odor is detected, is thus detected.

Furthermore, the safety device according to the present invention advantageously comprises an actuator member which, when the stove is in operation in the presence of too little oxygen, puts it out of operation by, for example, switching off the burner or in the operating state of the stove, whereby soot and / or odor, the stove is placed in a desired operating state, for example by automatically setting the stocking to a suitable height, including the maximum height, the minimum height or a middle in between. In addition, means can be provided for, if the safety device has already placed the stove one or more times in a desired operating state from a detected undesired operating state, it will still be put out of operation.

The invention will now be described in detail with reference to a possible embodiment shown in the single figure of the drawing, applied to the two-stage combustion type petroleum stove.

Although in the drawing, the invention as applied to a petro- $ 5. Ü A 0 \ ixt)% tS vy Va '1 *? O iv

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24606 / JF / tv leum stove of the two-stage combustion type, it will be clear that the invention can also be advantageously applied to a petroleum stove of the single-stage combustion type. Moreover, the invention is not only applicable to petroleum stoves, but as far as can now be seen, it does provide the most advantages in that application.

In general, the protection device, which will be electrical or electronic in nature, is applicable to stoves of the type, which during normal operation are outside a certain range, that is to say lower and / or higher, of the height by flames produced by the stove, or a single flame and / or from the height to which a heater, i.e. burner, becomes warm is indicative of an undesired operating condition of the stove, i.e. too little oxygen present, with the risk of generating carbon monoxide or the abnormal burning of the stove, causing soot and / or smell.

In the figure of the drawing, reference numeral 1 denotes a very schematic and simplified two-stage combustion type petroleum heater, while reference numeral 2 denotes the safety device according to the present invention, albeit in the form of a very simplified block -scheme. In this connection, it is noted that it will be readily apparent to a person skilled in the art from this highly simplified block diagram how to set up the protection device, in particular the electrical or electronic part thereof, with the aid of components according to the current state of the art, including a range of sensors, actuators, digital circuits and even microprocessors.

First, a brief description will be given of the kerosene heater 1. The kerosene heater 1 contains a tank 11 for kerosene or other suitable liquid fuel. Connected to the tank 11 is a wick regulator 12 with a wick member 13, in particular a stocking.

The wick regulator is provided with an adjustment means (not shown) for adjusting the height of the wick element, which of course communicates with the petroleum contained in the tank 11. By igniting the petroleum-soaked wick, combustion of the petroleum and its reaction with oxygen will cause combustion, 3 Γ \ Λ Λ. »Λ Λ J» J Ü ij «u -4- 24606 / JF / tv generating heat. This lighting can be done with, for example, matches, but in the embodiment of the petroleum stove 1 shown there is provided an ignition 14, which is electronic in this exemplary embodiment shown. Further connected to the wick control member is a safety mechanism 15 which, in this embodiment, cooperates with the aforementioned adjusting member, not shown, in the event of tilting or knocking over the kerosene heater 1 to lower the wick member so that the fire extinguishes. This is one of the ways of what is called turning off the burner.

Connected to the wick controller is a heating member or burner head, which consists of a lower burner 16 and an upper burner 17. In the case shown, the lower burner 16 contains an element in the form of substantially a perforated sleeve, while the upper burner 17 has an element in the essentially in the form of a closed sleeve. A plate 19 is placed on the top of the non-perforated sleeve of the top burner 17. The flame or flames 18 hereby develop substantially along the circumference of the non-perforated sleeve, as a result of the action of the circular plate 19 upwards deviating from this surface of the cylindrical non-perforated sleeve, so that a upward fanned out shape.

The safety mechanism can comprise a counterweight and a catch, the catch with the counterweight being prestressed when the wick height is adjusted by the wick regulator, which can be referred to as switching on the burner, whereby the counterweight when energized by, for example, striking the safety mechanism 15 is moved, the catch snaps back and the stocking height is adjusted minimally by the adjuster and the burner is switched off as mentioned earlier.

It is noted that there are known oil heaters with electric ignition, for which purpose the oil heater provides for the connection and inclusion of one or more batteries. In principle, therefore, a known source of electric power can be present in known petroleum heaters.

35 It is further noted that there are known or conceivable petrol stoves with, in addition to a source of electrical energy, an electronic device for controlling the switching on and off of the burner and the burner. setting the height of the wick member, for example in conjunction with a possible electronic timer and a thermostat. Most of the timer can contain part of said integrated circuit (timing part). The same 5 can apply to the thermostat.

It is therefore noted in advance that the protection device can be built into existing petroleum heaters simply by arranging a sensor member and an actuator member therein and providing an electronic circuit or modifying the existing electronic device, which in practice may amount to replacement. from one chip to another.

In the following, the security device of the present invention will now be discussed more specifically.

The security device 2, which in the embodiment shown is of an electronic nature, comprises an electronic circuit 24, a sensor member 21a, 21b, 22a, 22b, an actuator member 29 and a power supply member 23, which last member can be formed by the batteries present in the stove. In addition, the shown security device according to the invention comprises a delay member 27 and 20, a response delay member 28, the operation of which will be explained in detail later, as well as a timer 25 and a thermostat 26, which may be formed by the aforementioned timer and thermostat or can include.

Although, as mentioned, the security device 25 shown is of an electronic nature, this is not necessary, for instance if the sensor member comprises a bimetal, this bimetal can directly actuate the actuator member 29.

The security device 2 thus comprises a sensor member 21a-b, 22a-b, which comprises at least one sensor. The sensor member senses whether it detects whether the height of the flame or flames is outside a certain range, ie whether the flame is too low and / or too high. In particular, in the shown embodiment, the sensor member comprises a first flame sensor 21a and a second flame sensor 21b, the first flame sensor 21a being placed at a relatively great height and the flame sensor 21b at a relatively small height with respect to the top burner 17 . Thus, the first flame sensor 21a detects too high flames and the second scanning sensor 21b detects too low flames. In other words, the first flame sensor SS r: G 1 3 3 o -6- 24606 / JF / tv * 21a detects an abnormal operating condition, causing soot and / or odor, while flame sensor 21b detects an abnormal operating condition, where there is too little oxygen and there is a risk that carbon monoxide could be generated. Particularly when a timer 25 is provided, the flame sensor 21a is important because the soot and / or smell generation may not be detected by a person. At all times, the flame sensor 21b is of great importance, because it can thus be detected, as it were, that there is too little oxygen for safe operation of the kerosene heater.

The flame sensor 21a, 21b can be, for example, a thermocouple, bimetal, a visible light sensor, an invisible light sensor or an ionization sensor. How a useful detection signal can be obtained from these sensors is clear to any person skilled in the art. The same applies with regard to its placement relative to the top burner.

In addition to, as in the shown embodiment, or instead of the flame sensor 21a and / or 21b, the two-stage paraffin heater may include a heat or radiation sensor 22a located at a relatively great height relative to the first burner 16. This heat or radiation sensor 22a has a function which is similar to that of the flame sensor 21a, although the operating state related to sensor 22a occurs when the wick member 13 is set too low.

Although a second heat or radiation sensor 22b is shown in the embodiment, it is specific to the case of a petroleum-25 heater with a single burner head 16. In that case, the sensor 22b is at a relatively small height relative to the burner 16 positioned to have an operation analogous to that of sensor 21b, namely too little oxygen for good combustion with the associated potential danger of carbon monoxide development.

In the case of a single-stage paraffin heater, two heat or radiation sensors 22a, 22b may also be provided, in which sensor 22a corresponds to too high a stocking position and sensor 22b may be (partly) representative of a wick element 13 set too low.

The heat or radiation sensors 22a, 22b can be, for example, a thermocouple, a bimetal or an infrared sensor.

The signals from the sensors 21a-b, 22a-b are supplied to the electronic circuit.

8500833 is -7- 24606 / JF / TV

Preferably, the electronic circuit 24 includes a discriminator for determining whether the detection signal from the sensors is representative in the case of the presence of too little oxygen or in the case of soot and / or smoke. In the first case, the electronic circuit 24 will actuate the actuator member 29 to turn off the burner 16, 17, while in the second case, the electronic circuit may actuate the actuator member to adjust the wick regulator 12 to set the wick at a given position, as stated previously, possibly a minimum, middle or maximum 10 position. In addition, the electronic circuit may include a counter to keep track of how many times the actuator has actuated the adjuster to assume a good position from too high or a low position and a detector to count a certain number after the counter has been counted turn the burner off.

The detection signals can thus simulate the operation of the timer 25 and / or the thermostat 26.

For both switching off the burner and adjusting the wick member, the actuator member 29 may be connected to the wick regulator adjusting member.

The actuator member can also be connected to the safety mechanism to simulate, as it were, a tilt or knock.

In view of the above directly, the actuator member may comprise an electric motor for separately controlling the adjustment height of the wick member 13, i.e. independently of the wick controller, which allows the wick height to be adjusted manually, preferably immediately the protection mechanism 15 is set to "sharp". The actuator member can also be of the electromagnetic type for circumferential switching of the switch pawl of the protection mechanism 15 when energized, thus simulating the tipping over or tilting. to be.

The reason for providing the delay member 27 and the response delay member 28 will now be discussed in more detail.

The delay member 27 has the function of blocking the controllability of the actuator member 35 for a certain period of time. Namely, a certain time elapses between the (ability to) switch on the stove and the development of flames in the example shown, i.e. normal operation. In order to avoid a false indication of flame 35:? 39 _____ -8- 24606 / JF / tv, the detection will have to wait as long as necessary for the stove to come into normal operation after switching on. Accordingly, the delay time of the delay member 27 is set. This delay member 27 may be a timer and be part of an integrated circuit or be provided in the form of a separate (smaller) integrated circuit.

The response delay member 28 is also provided to prevent false actuation of the actuator member on the basis of detection signals from the sensor member, for example in the case of the flame flaring, wherein the flame may have too small a height for a short period of time. This contact delaying device can also be realized in a timing IC or included in a larger integrated circuit. It will be clear that the delay time of the delay member 27 will be longer than that of the response delay member 28.

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Claims (17)

1. Protection device for a stove of the type in which during normal operation the out-of-range range of the height of flames produced by the stove and / or from to which a heating element becomes hot is characteristic of an undesired operating condition, with the characterized in that it comprises a sensor member for sensing said height (s) and outputting a therefor representative detection signal 10 outside its respective range and an actuator member for placing it in a desired operating state in response to the detection signal operating the stove.
Security device according to claim 1, characterized in that an electrical or electronic circuit is connected between the sensor member and the actuator member for transmitting a control signal to the actuator member in response to the detection signal from the sensor member.
Protection device according to claim 1 or 2 for a kerosene heater with a burner head, comprising the heating member 20 in the form of substantially a perforated sleeve, characterized in that the sensor member has at least one heat placed at a certain height relative to the sleeve - or radiation sensor.
A safety device according to any one of the preceding claims for a kerosene heater with a burner head, comprising an upper burner, in particular with substantially a non-perforated sleeve, along the outer surface of which flames develop during operation, characterized in that the sensor member comprises at least one flame sensor positioned at a certain height relative to the sleeve.
Security device according to claim 3, characterized in that the sensor member comprises two heat or radiation sensors, one of which is placed at a relatively high height and the other at a relatively small height.
Security device according to claims 3 and 4, characterized in that the sensor member comprises one heat or radiation sensor placed at a relatively great height.
Security device according to claim 4 or 6, characterized in that the sensor member comprises two flame sensors, one of which is at a relatively high height and the other at a relatively small height of 850 ° 389 -10-24606 / JF / tv height. placed.
Security device according to any one of claims 3, 5 or 6, characterized in that the or a heat or radiation sensor is a thermocouple, a bimetal or an infrared sensor. 5
Device according to one of claims 4, 6 or 7> characterized in that the or a flame sensor is a thermocouple, a bimetal, an (in) visible light sensor or an ionization sensor.
Safety device for a kerosene heater with a wick regulator, comprising a wick member holder, and an adjusting member 10 for adjusting the wick member height, characterized in that the actuator member is connected to the adjusting member.
Security device according to claim 10, characterized in that the actuator member comprises an electric motor.
A safety device according to any one of the preceding claims for a kerosene heater with a safety mechanism, which, for example, automatically switches it off when the heater is knocked over, for example by switching off the burner of the heater, characterized in that the actuator member, if activated, sets the security mechanism in motion.
Security device according to claim 10 or 11 and 12, characterized in that the security mechanism forms part of the adjusting member.
Security device according to claim 12 or 13, wherein the security mechanism is provided with a switch pawl, characterized in that the actuator is of an electromechanical type and is arranged in co-action with the switch pawl.
Security device according to one of the preceding claims, characterized in that it comprises a detection device for detecting the production or start-up of the stove, and a delay device initiated by the detection device for blocking the fire for a certain period of time. controllability of the actuator member.
A security device according to any one of the preceding claims, characterized in that it comprises a response delay means for blocking the actuability of the actuator member for a certain period of time after receiving the detection signal and only releasing the actuability of the actuator member when after the specified time has elapsed, the detection signal is maintained. 8500889 * -11- 24606 / JF / TV *
Protection device for a kerosene heater with a timer and / or a thermostat and an electronic device in the form of, for example, an integrated circuit for switching the burner on and off in response to signals from the timer and / or thermostat, respectively. the heat to be delivered by the burner, characterized in that the electronic device comprises the electronic circuit and / or the delay member and / or the response delay member and, on the basis of the possibly delayed detection signal, switching off the timer and / or a 10 simulates control of the thermostat member. Eindhoven, March 1985850 01-19
NL8500889A 1985-03-27 1985-03-27 Protection device for a stove, in particular a petroleum stove. NL8500889A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
NL8500889A NL8500889A (en) 1985-03-27 1985-03-27 Protection device for a stove, in particular a petroleum stove.
NL8500889 1985-03-27

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL8500889A NL8500889A (en) 1985-03-27 1985-03-27 Protection device for a stove, in particular a petroleum stove.
EP19860902523 EP0217909A1 (en) 1985-03-27 1986-03-27 Safety device for a stove, in particular a paraffin stove
PCT/NL1986/000010 WO1986005860A1 (en) 1985-03-27 1986-03-27 Safety device for a stove, in particular a paraffin stove

Publications (1)

Publication Number Publication Date
NL8500889A true NL8500889A (en) 1986-10-16

Family

ID=19845743

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8500889A NL8500889A (en) 1985-03-27 1985-03-27 Protection device for a stove, in particular a petroleum stove.

Country Status (3)

Country Link
EP (1) EP0217909A1 (en)
NL (1) NL8500889A (en)
WO (1) WO1986005860A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5165883A (en) * 1989-10-26 1992-11-24 Toyotomi Co. Ltd. Apparatus and method for safe operation of kerosene heaters
DE8912773U1 (en) * 1989-10-26 1990-03-22 Toyotomi Kogyo Co., Ltd., Nagoya, Aichi, Jp
GB2254945A (en) * 1991-04-19 1992-10-21 British Gas Plc Thermoelectric sensor for a gas burner
FR2751400B1 (en) * 1996-07-16 1998-08-21 Dtn Fr Sa Radiant convector with oil with wick associated with a thermostat
NL2002762C2 (en) * 2009-04-17 2010-10-19 D & J Holding B V Atmosphere, furnished for the burning of liquid fuel, in particular bio-ethanol.

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1212453A (en) * 1958-10-16 1960-03-24 A safety device for gas apparatus
JPS5630520A (en) * 1979-08-20 1981-03-27 Matsushita Electric Ind Co Ltd Safety device for combusting apparatus

Also Published As

Publication number Publication date
EP0217909A1 (en) 1987-04-15
WO1986005860A1 (en) 1986-10-09

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