JPH04285848A - Liquid discriminating apparatus - Google Patents

Abstract

PURPOSE:To easily distinguish the quality and the kind of an inflammable liquid such as fuel of a warmer burner or the like. CONSTITUTION:A closed container has an air chamber 9 defined therein by a container 1 and a lid body 8, and a detecting means 11 for detecting the presence/absence of the ignition within the air chamber 9. An inflammable liquid sample 16 is put in the air chamber 9, and heated by a heater 3 which heats the sample 16 together with the container and the lid body. When the sample 16 reaches a predetermined temperature, a heat-sensitive element 4 arranged to have a thermal correlation with the sample is actuated. A predetermined current starts to flow in an ignition heater 14 inside the air chamber in response to the signal from the heat-sensitive element 4. The quality or the kind of the inflammable liquid sample is distinguished from the active or inactive state of means for inspecting the presence/absence of the ignition at the time.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for determining whether the flash temperature of a flammable liquid is high or low, and more particularly to a device for determining differences in flash point due to deterioration of kerosene.

0002

[Prior Art] Conventionally, kerosene stoves, kerosene fan heaters, etc. use kerosene as fuel, and the kerosene is generally transferred from a plastic tank used for delivery or storage at home to a main body tank or a cartridge tank. has been used. In general, no investigation is done on the alteration or deterioration of this kerosene. However, kerosene that has been stored in ordinary households for a long period of time, for example until the next season, cannot be said to have good storage conditions and often deteriorates and changes in quality. During combustion, smoke and strange odors were produced, soot and other substances adhered to the combustion part, causing combustion failures, and in some cases, defective combustion system parts needed to be replaced.

[0003] Furthermore, there is a need to prevent dangerous situations such as mistaking gasoline for kerosene and supplying it to a kerosene heater.

It is known that altered and degraded kerosene has a different flash point compared to normal kerosene. JIS K2 is a method for measuring the flash point of crude oil and petroleum products.
There are TAG sealed flash point testers, such as those shown in US Pat. FIG. 10 shows a partial sectional view thereof. The structure and measurement method will be explained according to FIG. 10. The lid 105
and a sample cup 101 sealed by a movable plate 106
A bath liquid tank 103 containing 50 ml of a flammable liquid sample 102 brought to a temperature at least 11° C. below its expected flash point.
It is gradually heated by a bath liquid 104, such as water or a mixture of equal parts of water and ethylene glycol. Sample 10
When the temperature of No.2 reaches 5℃ lower than the expected flash point, remove lid No.2.
Slide the movable plate 106 on the lid 105 and open the three holes 1 on the lid 105.
11A, 111B, and 111C, and tilt the test flame peeking mechanism 107 as shown in the dotted line to open the nozzle 1.
The test flame 109 at the tip of 08 is shown. If no ignition is observed, the temperature of the sample is raised via the bath liquid 104 using the heater 110, and the test flame 109 is exposed as described above. Repeat this operation and the temperature at which ignition is observed is considered the flash point.

When the flash point of a sample of kerosene was measured using this TAG sealed flash point tester, the following results were obtained. In addition, sample A in the table is new kerosene. Sample B is kerosene that has been used for about half a season. For convenience, the degree of deterioration of sample B will be referred to as [degree of deterioration 0.05] below. Sample C is kerosene that has been used for about one season, and its degree of deterioration is assumed to be 0.1 for convenience.

[0006]

[Table 1]

[0007] As described above, as the storage period becomes longer and the deterioration progresses, the flash point clearly increases.

[0008] Also, in order to avoid accidentally putting gasoline into equipment that should use kerosene, if we compare and determine the difference in their flash points, it is clear that gasoline with a lower flash point than kerosene should be used. It is possible to determine.

[0009]

[Problems to be Solved by the Invention] However, this test device has a complicated structure and is large in size, requires 50 ml of sample, and takes a very long time to obtain measurement results.
Furthermore, it is necessary to visually confirm the moment of ignition to confirm ignition, and it is also very expensive, which poses many problems for use in general households.

[0010] Furthermore, in general, it is not necessary for the device to be versatile enough to check the flash points of many types of flammable liquids like this device. Therefore, the flash point to be measured can be predicted by assuming the type of flammable liquid to be measured.

In the present invention, when the flammable liquid sample whose flash point is to be measured is, for example, kerosene, the temperature at which the presence or absence of ignition should be determined can be determined by measuring the temperature rise characteristics of the sample in advance. By setting the device in advance and determining whether it will ignite at that temperature, it is possible to determine whether the flammable liquid is deteriorating or deteriorating, and by providing a mechanism that displays the determination results, it is possible to determine whether the flammable liquid is deteriorating or deteriorating. This is intended to make it easier to determine deterioration. In addition, in order to prevent people from accidentally replacing gasoline with kerosene, the temperature at which the presence or absence of flammability should be determined is set between the flash point of gasoline and the flash point of kerosene. It is something to do.

0012

[Means for Solving the Problems] The device of the present invention has a generally cylindrical shape in which a heat-sensitive element or a temperature sensing element that operates at a predetermined temperature that serves as a reference for determining alteration or deterioration of a sample is provided in a thermally conductive state. An ignition heater that injects a flammable liquid sample at a temperature lower than the flash point into a sample container with an opening at the top and a bottom at the bottom, and generates a predetermined amount of heat inside the sealed container. A lid provided with the sample is brought into contact with the opening of the container to form a closed container in which the sample is accommodated together with air. Next, a heating heater provided in thermal conduction with the container is energized to heat the flammable liquid sample. At this time, the temperatures of the heat-sensitive element or temperature measuring body and the flammable liquid sample increase in a related manner. When the sample reaches the temperature to be determined, the heat-sensitive element or temperature measuring element reaches a predetermined temperature derived from the above-mentioned relationship and operates, and the power to the heating heater is cut off. Electrify the ignition heater. By providing means for detecting the presence or absence of flammability at this time and providing means for displaying the determination, it is possible to easily determine the quality of the flammable liquid sample.

According to the present invention, it is possible to provide an inexpensive device that can easily determine the deterioration and deterioration of kerosene in general households. Furthermore, in the case where the heat-sensitive element has an operating point based on the flash point of gasoline, etc., it is possible to prevent the danger of accidentally using gasoline instead of kerosene.

[0014]

[Example] Next, in order to clarify the effects of this invention, a specific experiment using kerosene will be described. JI mentioned earlier
The S K2265 tag sealed flash point tester has a sample cup 101 with an inner diameter of 54 mm and a depth of approximately 55 m as shown in Figure 10.
m, and requires 50cc of sample. Next, we conducted an experiment to see how the flash point would be affected by making this smaller and reducing the amount of sample. The experiment was carried out by placing a sample cup 101 in a cylindrical container 12 with a bottom, the cross-sectional view of which is shown in FIG.
1 was provided, and the sample was placed in it. In the figure, a container 121 is made of aluminum to obtain good thermal conductivity, and 122 is an O-ring made of oil-resistant rubber or the like. Also, the outer diameter d0 of the container shown in the figure is 40 m.
m, depth h is 10 mm, and the inner diameter d is changed 4
The experimental results for the types are shown in the table below.

[0015]

[Table 2]

[0016] Through this experiment, it was found that even if the sample size was reduced by making the container smaller, the measured values would change slightly, but the difference between degraded samples and non-deteriorated samples could be clearly measured.

Next, in order to investigate the relationship between the flash point measurement using a test flame using gas and the flash point measurement using an electric heater wire, a diameter of 0.16 m was placed at the tip of the test flame nozzle 108.
The flash point was measured using a nichrome wire equipped with an electric heater for ignition. The results of an experiment conducted with the heat output of the heater set to 6 watts are shown below.

[0018]

[Table 3]

It has been found that if a heater constructed in this manner is selected, a difference in flash point will clearly appear. Furthermore, the overall measured value was slightly higher than when using a gas test flame, which is thought to be due to the difference in the mechanism of ignition of the gas by the heater and the test flame.

[0020] Furthermore, in order to investigate how much the rate of temperature rise of the sample affects the measurement of the flash point, we measured the flash point using the above-mentioned device while changing the rate of rise, and the following results were obtained. Ta.

[0021]

[Table 4]

[0022] Thus, it has been found that this rate of rise has almost no effect on the measurement of the flash point.

Based on the above findings, embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which a container 1 is made of metal such as aluminum and has a generally cylindrical shape, and in this embodiment, the inner diameter thereof is 12.8 mm. A heating heater 3 is wrapped around the outer periphery of the container 1 in a thermally conductive manner via an insulating coating 2 made of heat-resistant resin or the like. A heat-sensitive element 4, such as a closed type temperature switch, using a bimetal plate, which is adjusted in advance to operate at a predetermined temperature, is inserted and fixed at the lower end of the container 1, which also serves as the bottom of the container. In addition, if a sufficient heat exchange relationship can be obtained between the sample and the heat-sensitive element 4, a partition 1B may be provided as shown in FIG. 8, and a temperature switch may be placed under this partition 1B. A semiconductor temperature sensor or a temperature-responsive element made of a thermosensitive magnetic material may be provided. Lead wires 5A and 5B for detection are electrically conductively connected to terminals 4A and 4B of the heat-sensitive element 4, respectively, by a method such as spot welding. The container 1 is inserted into a resin outer case 6 together with these members, and the bottom opening 6A side of the outer case 6 is filled with an adhesive 7 and fixed. Furthermore, heater screw terminals 3A and 3B are provided penetrating the external case 6, and both ends of the heating heater 3 are connected to these terminals.

A lid 8 made of metal such as aluminum is placed in contact with the upper end opening 1A of the container 1, forming a closed air chamber 9 surrounded by the container 1 and the lid 8. Further, the lid body 8 is inserted into a resin cover 10. The lid body 8 and the cover 10 have upper openings 8A and 10A, respectively,
The air chamber 9 can be opened to the outside air. A pressure receiving piston 11 is inserted through the upper openings 8A and 10A so as to be movable in the vertical direction. A magnet 11A is attached to the upper part of the pressure-receiving piston 11 as a means for detecting the presence or absence of ignition, and a resin support rod 11B slides on the upper part of the magnet 11A through a receiving plate 13 made of a magnetic material, which will be described later. Possibly installed. A receiving plate 13 made of an iron plate or the like is fixed to the upper part of the cover 10 via a spacer 12. Further, in the air chamber 9 described above, an ignition heater 14 made of a resistance material such as a nichrome wire is insulated from and penetrates the lid 8 and connected to ignition heater terminals 14A and 14B fixed to the cover 10 with screws or the like. Further, in this embodiment, a determination plate 15 is provided to facilitate determination confirmation. On the left side of the judgment board 15, there is a display of non-defective products at the top and a display of defective products at the bottom, and the arrow 11C of the indicator bar 11B points to this display section.

Next, the method of operating this device will be explained. When the lid 8 is removed from the container 1, the sample 16 of a flammable liquid, such as kerosene, which has been brought to a temperature lower than at least its expected flash point, is also brought to a temperature lower than the expected flash point of the sample 16 to be measured. An appropriate amount, in this example, 0.5 cc, is injected into the container 1 that has been prepared. Then, the opening of the lid 8 is brought into contact with the opening of the container 1 to form a closed container in which the atmosphere is injected into the air chamber 9 and the sample 16 is injected into the container 1. At this time, the pressure receiving piston 11 is pushed down as shown in FIG.

Next, electricity is applied to the heating heater 3 to heat the container 1 and the inside of the air chamber 9 through it. The electric current to the heating heater 3 is adjusted so that the temperature inside the air chamber 9 containing the vapor of the sample 16 can be made almost uniform by this heating near the expected flash point of the sample to be measured. If the rising speed at this time is fast, it will be difficult to control the temperature near the measurement temperature, so for example, in the case of kerosene, it takes 5 to 50 minutes to raise the temperature from 5℃ to 45℃.
It is preferable to select a process that takes about 10 minutes. At this time, the temperature of the heat-sensitive element also rises in a predetermined thermal relationship with the temperature within the air chamber. When the temperature inside the air chamber 9 eventually reaches the expected flash point, the operating temperature is measured in advance.The temperature is set in relation to the expected flash point temperature of the sample, for example, 44° C.
The heat sensitive element 4, which is set to switch from on to off at 45° C., operates. As a result of this operation, the power supply to the heating heater 3 is cut off, and at the same time, current is supplied to the ignition heater 14 for a predetermined period of time to provide the energy required for ignition when the sample is normal. As a result, if the sample 16 is normal, the vapor of the sample in the air chamber 9 is ignited. At this time, the pressure inside the air chamber 9 increases rapidly, and the lid body 8
The pressure receiving piston 11, which is vertically movably inserted into the upper opening 8A, is pushed up as shown in FIG. In this way, the gas inside the air chamber 9 is discharged to the outside through the gap between the pressure receiving piston 11, the lid body 8, and the cover 10. Further, when the pressure receiving piston 11 is pushed up, it comes into contact with a receiving plate 13 provided at the upper part. At this time, since the magnet 11A is attached to the upper surface of the pressure receiving piston 11, the pressure receiving piston 11 is held in the same position, and the position of the arrow 11C on the support rod 11B naturally points to the non-defective display on the judgment plate 15. . This facilitates confirmation of ignition at any time after the lapse of time. In addition, if the ignition heater 14 does not catch fire even after being energized for a predetermined period of time,
Since the energization is terminated and the pressure receiving piston 11 remains in the state shown in FIG. 1, the sample is determined to be a defective product that has changed in quality and deteriorated.

The means for detecting the presence or absence of ignition is not limited to this method, but the signal may be detected by a reed switch 17 as shown in FIG. A variety of methods are available, including a light-emitting display. In the figure, the symbol 18 holding the magnet 11A is a pressure receiving piston, the reed switch 17 is supported by a support 19, and other symbols are the same as those shown in the first diagram.

[0028] The above-mentioned device can be automatically energized using an electric circuit as shown in FIG. To explain the operation of this circuit, the power source E is a commercial power source, which is a household 100 V AC power source, and is stepped down to about 5 V DC using a transformer. Of course, a DC power source such as a dry battery may be used. First, when you turn on the power switch SW, transistors Q1 and Q2
is turned on and the power indicator LED lights up. At this time, current flows through the heat sensitive element 4 to the heating heater 3 and heats the sample. Eventually, the temperatures of the sample and the heat-sensitive element rise in a thermal relationship, and when a predetermined temperature is reached, the contact point of the heat-sensitive element 4 opens, and the current supply to the heating heater 3 is stopped. At the same time, transistors Q3 and Q4 are turned on, and the ignition heater 14 is energized. The ignition heater current is controlled by the variable resistor VR to control the transistors Q6 and Q3, and is kept almost constant even if the voltage of the power source E changes from 6V to 4.5V, for example. This is very convenient when the power source E is a dry battery.

When the heat-sensitive element 4 is turned off, the capacitor Ct is charged by the resistor Rt, and the voltage turns on the transistor Q5, for example, after about 3 seconds. Therefore, transistors Q1 and Q2 are turned off due to the conduction of transistor Q5, and the power indicator LED is turned off. At the same time, transistor Q4 is turned off and power supply to the ignition heater 14 is stopped. If a pressure rise due to ignition in the air chamber occurs within the time period until the electricity supply to the ignition heater 14 is stopped, it is judged that the sample is normal, and if there is no pressure rise, it is judged that the sample has deteriorated. Further, unless the power switch SW is once turned off, the transistors Q1 and Q2 are maintained in the off state, so unless the power switch is turned off and turned on again, the device will not be restarted and no unnecessary current will flow through each heater. Note that the diodes D1 and D2 are used to provide a necessary voltage drop, and their number is appropriately selected.

In each of the embodiments described above, the temperature of the sample is measured by a thermometer such as a thermocouple (not shown) instead of the heat-sensitive element 4, and the temperature reaches a temperature set in advance in the control circuit. At times, it is also possible to determine whether there is a ignition by energizing the ignition heater. Furthermore, by providing a means to change the set temperature, it is possible to discriminate between liquids based on multiple conditions using a single liquid discrimination device, such as distinguishing between kerosene and gasoline, and between new kerosene and altered or deteriorated kerosene. becomes. In addition, by setting multiple temperature settings and determining the presence or absence of ignition at each temperature, a single liquid discriminator can distinguish liquids based on multiple conditions, such as distinguishing between kerosene and gasoline, and distinguishing between new kerosene and degraded kerosene. - It is also possible to identify degraded kerosene.

By using a small power source such as a dry battery as the power source E of each of the liquid discriminating devices described above, the device can be made smaller and lighter, and the liquid discriminating device can be made very convenient as a portable device. can.

Furthermore, it is also possible to output to an external device, for example, based on the determination result of the flammable liquid sample from the above circuit, that is, the presence or absence of ignition. For example, various methods can be considered, such as warning by a buzzer or synthetic voice, displaying the judgment result on a display panel, and automatically starting or stopping refueling by combining it with an electric pump for refueling.

[0033] Furthermore, the operating temperature of the heat-sensitive element of this liquid discriminating device is set to switch from on to off at a temperature higher than the flash point of gasoline and lower than the flash point of kerosene, for example, 35°C to 39°C. By doing so, it becomes possible to distinguish between kerosene and gasoline based on the presence or absence of ignition when electricity is applied to the ignition heater.

Next, another embodiment using this device will be described. FIG. 5 is a schematic diagram of an embodiment in which the liquid discriminating device described above is incorporated into a cartridge tank type oil fan heater or the like. As is well known, in such a cartridge tank type fuel supply mechanism, the cartridge tank 24 has a cap at one end of which is provided with a closing valve biased by a spring or the like so as to close the opening. It is used. This cartridge tank 24 is the auxiliary tank 3
It is installed on the oil pan part 23 on the top of the oil pan 23. At this time, the stop valve of the cap comes into contact with the pin disposed inside the oil pan, and the opening is opened against the biasing force of the spring due to the weight of the cartridge tank 24, and the kerosene inside is assisted from the oil pan 23. The oil is supplied to a combustor 33 via a tank 31 and an oil feed pipe 32. To explain further, the heat generated by burning kerosene in the combustor 33 heats the air in the heat exchanger 34, and is sent into the room by a fan (not shown). Further, symbol 30 indicates a printed circuit board having a control circuit for the fan heater, and symbol 35 indicates a display section of the fan heater that can display the remaining amount of kerosene, temperature, timer settings, etc.

The symbol 20 in the figure is the liquid discriminating device described above. In this embodiment, the liquid discriminating device 20 uses its power source as a fan heater, and its operation control circuit is provided on a printed circuit board 30 on which the fan heater control circuit is located.

When it is desired to discriminate between liquids, the sample liquid is transferred to the liquid discriminating device 2 using any method such as a dropper.
0, and the determination can be made using the method described above. Further, by sending the determination result to the control circuit of the printed circuit board 30, the operation of the fan heater can be automatically stopped when the kerosene is altered or deteriorated.

Next, FIG. 6 is a schematic diagram of an embodiment in which the operation of the liquid discriminating device incorporated in the aforementioned fan heater is automated. The cartridge tank 24 has a cap 26 at one end, which is provided with a shutoff valve 27 biased by a spring or the like so as to close the opening 26A. As is well known, when installing this cartridge tank in a combustor or the like, the cartridge tank 24 should be placed with the base 26 facing down.
It is installed on the oil tray part 23. At this time, the stop valve 27 comes into contact with the pin 28 disposed in the oil pan, and the opening 26A is opened by the weight of the cartridge tank 24 against the biasing force of the spring. As a result, the kerosene 25 inside the cartridge tank 24 flows from the oil receiving tray 23 into the auxiliary tank 31 and fills it.
The oil is supplied to the combustor 33 through the oil feed pipe 32.

The symbol 21 corresponds to the liquid determining device described above, and an air chamber 21A inside the liquid determining device 21 is connected to one end of a pipe 22 for supplying and discharging kerosene, which will be described later. The other end is connected to the oil pan 23. At this time, the bottom 21B of the air chamber 21A is set at a higher position than the bottom 23A of the oil pan 23.

If kerosene is burned even after the cartridge tank 24 is empty and requires refueling, the oil level will be below the bottom 23A of the oil pan 23, and since the pipe 22 is slanted, Air chamber 21 of liquid discrimination device 21
The kerosene 25 in A passes through the pipe 22, enters the auxiliary tank 31 from the oil drain hole 23B of the oil pan 23, and flows through the supply pipe 32 to the combustor 33. Next, kerosene 25% inside
When the cartridge tank 24 containing the cartridge tank 24 is installed in a predetermined position, the stop valve 27 of the base 26 provided at the bottom of the cartridge tank 24 is pushed up by the pin 28, and the kerosene 25 is poured into the oil pan 2.
Flows into 3. At this time, the oil drain hole 23B provided in the oil pan 23 is configured so that the amount of kerosene flowing through it is smaller than the amount of kerosene flowing out from the cartridge tank 24, so that the kerosene first flows into the oil pan 23. The oil accumulates and flows into the pipe 22 connected to the oil pan 23. Eventually, the kerosene reaches the outflow hole 23C provided on the side surface of the oil pan 23, and the kerosene flows into the auxiliary tank 31, filling the auxiliary tank. As is well known, the outflow of the kerosene 25 takes place at the same time as the inflow of air into the cartridge tank 24, so the kerosene 25 filling the auxiliary tank 31 and the oil pan 23 reaches the tip of the ferrule 26 and enters the opening 26A. The outflow stops when the oil level fills up the area, that is, when the oil level reaches the level A indicated by the broken line in the figure. At the same time, the kerosene 25 that has passed through the pipe 22 flows into the air chamber 21A and stops when it reaches the same level as level A. At this time,
By setting the height at which the liquid determining device 21 is installed at a predetermined position, the oil level of the inflowing kerosene can be determined. In other words, the amount of the measurement sample in the air chamber 21A can be kept constant.

Furthermore, when the aforementioned cartridge tank 24 is mounted, the fact is transmitted to the control circuit of the printed circuit board 30 of the fan heater by tank weight detection means 29 such as a microswitch or a load sensor. After receiving this signal, the control circuit starts energizing the heater 21C of the liquid discriminating device 21 to heat the sample after a preset time has elapsed. The time from when the cartridge tank is installed to when the heating of the sample is started is determined at least from when the cartridge tank 24 is installed when the kerosene in the internal tank of the fan heater is empty until the oil level reaches the nozzle 26 and the kerosene flows out. By making the time longer than the time it takes for the heater to stop, a predetermined amount of sample, ie, kerosene, can always be present in the air chamber 21A when the heater 21C is energized.

When the heated sample reaches a predetermined temperature, the heat sensitive element 21D transmits the signal to the control circuit of the printed circuit board 30, and the control circuit starts energizing the ignition heater 21E. At this time, if kerosene ignites, for example, the pressure receiving piston 21F equipped with a magnet and the reed switch 21G
A signal indicating that there has been an ignition is transmitted from a detection device such as a kerosene to the control circuit, and the control circuit determines that this kerosene is normal and stops energizing the liquid discrimination device 21, and the fan heater continues to operate normally. Continue driving. Further, the energization to the ignition heater 21E is for example 3 seconds, and if no ignition is detected during this time, the control circuit determines that the kerosene is abnormal, and terminates the energization to the liquid discriminating device 21. Stop operating the fan heater. At the same time, a display on the display of the fan heater indicates that the kerosene supplied is degraded kerosene to warn the user, and the use of degraded kerosene without realizing it may interfere with the combustion system of the heater. This makes it possible to prevent this from happening. Of course, it is easily understood that this warning may be given by a buzzer, a voice synthesizer, or the like.

[0042] When a warning of deterioration or deterioration of kerosene is issued,
Users can easily prevent malfunctions in the heater's combustion system by simply replacing the kerosene in the cartridge tank with new, unaltered and undegraded kerosene. Also,
At this time, when the cartridge tank is installed, some degraded kerosene will be sent into the combustor, but when about 2 cartridge tanks or about 10 liters of kerosene with a degradation level of 0.1 are used, the heating Judging from the experimental results that show that it causes problems with the aircraft's combustion system, there is virtually no problem if you replace the kerosene in the cartridge tank.

Another embodiment in which the liquid discriminating device shown in FIG. 1 is automatically incorporated into a cartridge tank type kerosene fan heater or the like will be described with reference to FIG. 7. In FIG. 7, numeral 41 is similar to the liquid discrimination device described above. In this embodiment, the air chamber inside the liquid discriminator 41 contains kerosene 2.
A pipe 42 for supplying and discharging kerosene 5 is connected, one end of the supply side is connected to the oil receiving pan 23 that receives kerosene from the cartridge tank, one end of the discharge side is connected to the auxiliary tank 50, and A fuel supply pipe 51 that supplies kerosene to a combustor (not shown) is connected to the auxiliary tank 50. Also, the liquid discrimination device 4 on the pipe 42
A fuel supply valve 43A and a discharge valve 43B are disposed before and after the pipe 1, respectively, and the pipe 42 can be shut off by these valves. Note that in FIG. 7, the same symbols are used for parts having the same function as those shown in FIG. 6.

In this device, when the cartridge tank 24 containing kerosene 25 is installed in a predetermined position, the stop valve 27 of the base 26 provided at the bottom of the cartridge tank 24 is pushed up by the pin 28, and the oil-receiving tray 23 is opened. Kerosene 25 leaks out. At this time, a detection mechanism 29 such as a microswitch or a load sensor for detecting that the cartridge tank has been installed simultaneously transmits this information to the control circuit of the fan heater and liquid discriminating device on the printed circuit board 30. At this time, the fuel supply valve 43A is closed and the discharge valve 43A is closed.
B is released. Therefore, the flow of the kerosene 25 that has flowed out from the cartridge tank 24 is stopped by the supply valve 43A, and once it fills the oil receiving tray 23, when the oil level reaches the opening of the nozzle 26, it no longer flows out from the cartridge tank. Stop.

An oil amount detection device 54 such as a float switch or a load sensor is incorporated in the auxiliary tank 50 to detect the amount of kerosene inside the auxiliary tank. When the amount of kerosene in the auxiliary tank 50 is a predetermined amount, for example, in the oil pan 23
All the kerosene in the tank flows into the auxiliary tank and the liquid discrimination device 4
When the amount of kerosene in the cartridge tank falls below the amount that can be filled with newly supplied kerosene in the cartridge tank, the oil amount detection device 54 notifies the control circuit of this. In response, the control circuit opens the fuel supply valve 43A and introduces the kerosene 25 into the auxiliary tank 50 through the liquid discrimination device 41. After a preset time has elapsed, the fuel supply valve 43A and the discharge valve 43B are closed, and electricity is started to be applied to the heater of the liquid discriminating device 41, thereby starting to raise the temperature of the kerosene. By setting the time from the opening of this fuel supply valve to the closing of both valves to be at least longer than the time until the flow of kerosene into the air chamber is completed, the air chamber is always filled with electricity when the heating heater is energized. A predetermined amount of sample, ie kerosene, can be present. Thereafter, the kerosene is determined through the same process as in the embodiment described above, and if the kerosene is determined to be good, both the fuel supply valve 43A and the discharge valve 43B are opened and the kerosene is supplied to the combustor side. In addition, if it is determined that the kerosene has changed or deteriorated, the fan heater will stop operating, and the fan heater display panel will notify the user that the kerosene has deteriorated. Warning.

According to this embodiment, since the valve is provided in the liquid supply path, even if the kerosene has deteriorated, the amount of kerosene sent to the combustor can be kept to a minimum. In addition, even if kerosene is not immediately supplied from a new cartridge to the liquid discriminator because the cartridge tank is refueled before it is completely empty, only the kerosene in the auxiliary tank is burned first. By supplying kerosene into the liquid discriminating device as soon as it becomes possible to introduce kerosene newly supplied from the cartridge tank into the liquid discriminating device, it is possible to more reliably detect kerosene. It becomes possible to judge alteration and deterioration. Furthermore, since the kerosene in the liquid discriminator is always replaced with newly supplied one, by providing a separate startup switch for the liquid discriminator, the kerosene can be reliably determined at any time other than when cartridges are replaced.

In each of the embodiments described above, one liquid can be discriminated by using a heat-sensitive element that operates at a plurality of temperatures, and by energizing the ignition heater at each temperature to discriminate whether or not there is ignition. The device can identify liquids based on multiple conditions,
For example, it is possible to distinguish between kerosene and gasoline, and between new kerosene and altered or deteriorated kerosene.

[0048]

As described above, the liquid discriminating device of the present invention can be used to inspect flammable liquids such as kerosene for deterioration or deterioration, or to discriminate between liquids with different flash points such as kerosene and gasoline. It is an inexpensive mechanism that can be easily performed anywhere.

Furthermore, in a device in which the liquid discrimination device of the present invention is incorporated into a fan heater or the like, it becomes possible to very easily discriminate the deterioration of the kerosene used as fuel, thereby preventing failures of combustion system parts, etc. Furthermore, in the case of automated operation, accidents caused by deterioration of kerosene can be reliably prevented. Furthermore, by setting the operating temperature of the heat-sensitive element so that it is possible to distinguish between kerosene and gasoline, it is possible to prevent the danger of accidentally using gasoline as a fuel instead of kerosene.

[Brief explanation of the drawing]

FIG. 1: A vertical cross-sectional view of a first embodiment of the present invention.

[Figure 2] Figure 1
A partial vertical cross-sectional view showing the ignition detection state of the embodiment of

[Fig. 3] Longitudinal cross-sectional view of another embodiment of the present invention

[Figure 4] An example of an electric circuit used in the present invention

FIG. 5: Example of a liquid discrimination device incorporated in the combustion device of the present invention

FIG. 6 is a schematic diagram of the operating mechanism of another embodiment of the liquid discriminating device incorporated in the combustion device of the present invention.

FIG. 7 is a schematic diagram of the operating mechanism of another embodiment of the liquid discriminating device incorporated in the combustion device of the present invention.

FIG. 8 is a partial longitudinal sectional view of another embodiment of the present invention.

[Figure 9] Vertical cross-sectional view of parts used for operation confirmation test

[Fig. 10] Partial vertical cross-sectional view of a conventional flash point measuring device for flammable liquids.

[Explanation of symbols]

1: Container 3, 21C: Heating heater 4, 21D: Thermal element 7: Adhesive 8: Lid 9, 21A: Air chamber 11, 18, 21F: Pressure receiving piston (device for detecting the presence or absence of ignition) 11A: Magnet (Device for detecting the presence or absence of ignition) 11B: Support rod (device for detecting the presence or absence of ignition) 14, 21E: Ignition heater 16: Samples 17, 21G: Reed switches 20, 21, 41: Liquid discrimination device 23: Oil pan Part 24: Cartridge tank 25: Kerosene 29: Tank detection means 30: Printed circuit board 31, 50: Auxiliary tank 32: Supply pipe 33: Combustor 35: Display 43A: Fuel supply valve 43B: Discharge valve 54: Oil amount detection device

Claims (8)

[Claims] Claim 1: A container containing a sample, the upper end of which is an opening and the lower end of which is a bottom, a heat-sensitive element that operates at a predetermined temperature and that is in thermal conduction with the container, and a heating device that is in thermal conduction with the container. a heater for heating, a lid that contacts the opening of the container and constitutes a closed container; an ignition heater that generates a predetermined amount of heat is disposed on the inside of the lid, and When a predetermined amount of a flammable liquid sample is injected and a predetermined current is applied to the heating heater, the temperature of the sample and the heat-sensitive element are increased in a related manner, and the heat-sensitive element is heated by the operation of the heat-sensitive element. The quality or type of the flammable liquid sample is determined based on the activated or non-activated state of the means for detecting the presence or absence of ignition, at the same time as electricity is turned off to the ignition heater. liquid discrimination device. 2. The liquid discriminating device according to claim 1, comprising an electronic circuit for automatically controlling energization to the heating heater and the ignition heater. 3. A container in which a sample is placed, the upper end being an opening and the lower end being a bottom, a temperature measuring element provided in thermal conduction with the container, and a heating heater provided in thermal conduction with the container.
a lid that contacts the opening of the container and forms a closed container;
An ignition heater that generates a predetermined amount of heat is installed inside the container of the lid body, and an electronic circuit is provided to automatically control the electricity supply to the heating heater and the ignition heater. means for setting a plurality of expected operating temperatures for the sample, or means for changing the expected operating temperature settings for the sample, and a predetermined amount of the flammable liquid sample as the sample is placed inside the container. When the sample and the thermometer are injected and a predetermined current is applied to the heating heater, the temperature of the sample and the thermometer increase in a related manner, and the temperature measured by the thermometer reaches the set temperature. The power supply to the heating heater is cut off and the ignition heater is supplied with power, and the quality or type of the flammable liquid sample can be determined based on the activation or non-operation state of the means for detecting the presence or absence of ignition at that time. Characteristic liquid discrimination device. 4. A liquid discriminating device according to claim 1, which has a built-in battery as a power source and is portable. 5. The liquid discriminating device according to claim 1, wherein the liquid discriminating device is capable of outputting and controlling an external device based on a signal indicating the presence or absence of ignition. 6. The liquid discriminating device according to claim 1, wherein the operating temperature of the heat sensitive element is selected to enable discrimination between kerosene and gasoline. 7. The liquid discriminating device according to claim 1, which is installed in a combustion device comprising a cartridge tank for storing a flammable liquid and an auxiliary liquid tank for liquid level adjustment serving as a receptacle for the cartridge tank. 8. A cartridge tank for storing a flammable liquid, an auxiliary liquid tank for liquid level adjustment that serves as a receptacle for the cartridge, a detection means for detecting whether or not the cartridge tank is attached, and a display capable of displaying various information about the device. In a liquid discrimination device installed in a combustion device that is equipped with a printed circuit board that has a control circuit for monitoring and controlling the status of the device, the combustion device automatically supplies a sample of flammable liquid to the liquid discrimination device. - A mechanism for discharging the liquid and a mechanism for displaying the discrimination result of the liquid discrimination device and controlling the operating state, the control circuit being shared on the printed circuit board of the combustion device, and the power source being shared with the combustion device. liquid discrimination device.