JPH0443647B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a pot, and particularly to a pot having a liquid temperature display function.

<Prior art> For example, a thermos flask, a pot, etc., that was able to display the temperature inside the container was developed in 1983.
It is disclosed in Publication No. 42732 and Japanese Utility Model Application Publication No. 54-18768.

The one described in the former publication uses a curved thermometer to measure and display the temperature inside the heat insulating container.

On the other hand, the one described in the latter publication uses a spiral spring made of bimetal to display the temperature of the liquid passing through the spout.

<Problems to be Solved by the Invention> In the case of a thermos flask equipped with a thermometer described in the former publication, there is a drawback that the thermometer extending inside the heat-insulating container is easily bent or broken. In addition, since the curved part of the thermometer is placed between the outer cover and the heat-insulating container, a special space must be provided between the outer cover and the heat-insulating container, and the outer case is larger than the capacity of the heat-insulating container. It also has the disadvantage of being larger.

Furthermore, in the thermometer-equipped thermos flask described in the latter publication, it is not possible to measure the temperature of the liquid itself contained in the inner container. As the liquid passes through the spout pipe, the temperature of the liquid is detected by a spiral spring. Therefore, in order to know the temperature of the liquid inside the thermos, there was a drawback that the liquid had to be poured out from the spout into a pot or the like.

This invention was made in view of such conventional technology, and is capable of detecting and displaying the temperature of the liquid in the inner container, and moreover, the temperature display section makes effective use of the existing space and is easy to read. The purpose is to provide pots that are installed in position.

<Means for Solving the Problems> In the present invention, the liquid in the inner container housed in the outer case is guided to the upper part of the inner container through a spouting pipe, and the liquid is directed diagonally downward from the upper part of the inner container and from the inner container. The pot is configured to discharge water to the outside through a discharge pipe arranged to be inclined in a direction of separation, and includes a temperature sensor for detecting the temperature of the liquid disposed in the inner container, and a discharge pipe provided in the outer case. a water injection cover whose front surface is an inclined surface along the discharge pipe; and an indicator provided in a space formed between the inclined surface of the water injection cover and the discharge pipe; The display is electrically connected to the temperature sensor by a lead wire provided inside the outer case, and displays the temperature detected by the temperature sensor, and the temperature display surface of this display is It is characterized in that it is viewed through a display window formed on the inclined surface of the water injection cover. Further, the present invention relates to the pot having a liquid temperature display function, and is characterized in that a temperature sensor is attached to the water injection pipe.

Furthermore, the present invention relates to the pot having a liquid temperature display function, characterized in that the pot also has a liquid volume display function.

<Function> According to the present invention, the water injection cover is provided for mounting and protecting the discharge pipe, and is attached to the exterior case. The display for displaying the liquid temperature is
It is installed using this water injection cover.

That is, a display window is formed on the front inclined surface of the water injection cover, and the display is attached so that the temperature display surface faces through the display window. The water injection cover is
As mentioned above, it is for installing and protecting the discharge pipe, and originally there is a space between the discharge pipe and the water injection cover.
There is empty space. In the present invention, this empty space is effectively utilized to mount the display as described above. Therefore, the outer case does not become particularly large due to the attachment of the display.

In addition, since the front surface of the water fill cover is slanted diagonally downward from above and away from the inner container, the display surface of the indicator installed there is slanted in the same way as the sloping surface. The angle makes it very easy to see from above.

Furthermore, the temperature sensor is placed in the inner container housed in the outer case, and the indicator is installed in the water injection cover provided in the outer case, making it easy to electrically connect the two. It is. In other words, if the display is installed on the lid unit side, the lid unit opens and closes with respect to the outer case, so when electrically connecting between the temperature sensor and the display, the connection lead must be You have to be careful about line placement. On the other hand, if both the temperature sensor and the display are provided on the exterior case side as in the present invention, it is easy to electrically connect the two.

<Examples> Hereinafter, examples will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 shows a cross section of an airpot according to an embodiment of the present invention, in which 1 is an exterior case, 2 is a lid unit that is connected to the exterior case 1 at a hinge part 3 and can be opened and closed, and 4 is a lid unit that is housed in the exterior case 1. The inner container is made of a double-glazed glass bottle, and 5 is a stopper that is inserted into and removed from the upper opening of the inner container 4.

Inside the stopper 5, there is a stainless steel spouting pipe 6 that is formed to hang down on the lower surface of the stopper and guides the liquid at the bottom of the inner container 4 upward, and a communication section 8 that communicates with a water injection pipe that projects forward. is provided. A water stop valve 9 is housed in the communication portion 8 to prevent water from leaking when the product falls.

Further, inside the plug body 5, an exhaust port 10' of a bellows type air pump 10 housed in the lid unit 2,
A ventilation path 12 is formed that communicates the inside of the inner container 4.

A hook valve 11 is provided on the upper surface of the bellows type air pump 10.
1 is urged upward by the force of the spring 14 and comes into contact with the upper push plate 13. When no external force is applied to the push plate 13, the bellows type air pump 10 communicates with the inside and outside of the bellows type air pump 10. The mold air pump 10 is expanded and the push plate 13 is pushed upward.

Therefore, by pushing the push plate 13 in a known manner, the hook valve 11 is closed and the bellows type air pump 10 is compressed, so that the air from the bellows type air pump 10 flows into the ventilation passage 12.
The air pot of this embodiment is designed so that the liquid in the inner container 4 is discharged from the outlet of the water injection pipe 7 by this pressure and guided to the outside through the discharge pipe 15. It is configured.

The discharge pipe 15 is arranged obliquely downward from the outlet of the water injection pipe 7 in a direction away from the inner container 4. This discharge pipe 15 is attached to a water injection cover 17, and is surrounded and protected by the water injection cover 17. The water injection cover 17 is attached to the outer case 1.
The front surface of the water injection cover 17 is an inclined surface 17a along the inclination of the discharge pipe 15.

A display window 17b is formed on the inclined surface 17a of the water injection cover 17.

Between the water injection cover 17 and the discharge pipe 15,
When hot water passes through the discharge pipe 15, the water injection cover 1
A certain space is formed to prevent the user from withdrawing his/her hand due to heat when the user touches the area 7 with his or her hand. Display 16 is placed within this existing space. And display 1
6, the display surface 16a is the water injection cover inclined surface 17
It is arranged so as to face from the display window 17b of a.

Therefore, no special mounting space is provided for the display 16, and the display 16 is mounted by effectively utilizing the existing space.

As shown in FIG. 2, the display 16 is a liquid crystal display having a liquid temperature display 31 that displays the liquid temperature in four stages, and a battery display section 32 that indicates whether the battery is normal.

In addition, in FIG. 1, 18 is a battery storage section formed on the lower side of the hinge section 3.

The circuit configuration of this display device measures the resistance value of a temperature sensor Th consisting of a thermistor or the like attached to the lower side of the pouring pipe 6 to detect the liquid temperature, as will be described later. A waterproofed lead wire 19 runs along the inner or outer surface of the pouring pipe 6.
is growing. The lead wire 19 is connected to a metal member 20 provided around the stopper 5. A portion of this metal member 20 is adapted to come into contact with a connecting piece 22 provided at the opening of the inner container 4. The connection piece 22 is electrically connected to the display 16 by a lead wire (not shown) or the like.

The connection between the temperature sensor Th and the display 16 is relatively easy because both the temperature sensor Th and the display 16 are provided inside the exterior case 1 or inside the water injection cover 17 attached to the exterior case 1. It is. In other words, if the display 16 is disposed in the lid unit 2, the lid unit 2 can be opened and closed with respect to the outer case 1, making it difficult to wire the connection lead wires. On the other hand, if the temperature sensor Th and the display 16 are provided on the exterior case 1 side as in this embodiment, their connection is relatively easy.

Next, the display device will be explained based on FIG. 2 and subsequent figures.

Reference numeral 23 denotes an oscillation circuit for generating clock pulses consisting of a crystal oscillator, ceramic oscillator, etc., and 24 denotes a synchronous pulse generation circuit for generating pulses such as driving pulses for liquid crystal display, charging pulses, etc. from the clock pulses, and is composed of a flip-flop.

25 and 26 are both analog switches that close when the signal voltage is at a high level, and 27 is a clock input terminal.
“1” every time a high level signal voltage is input to CL
28 is a latch circuit that takes in the input signal voltage of the data terminal and maintains the output when a high-level signal voltage is input to the gate terminal G, 29 is a comparator composed of an operational amplifier, and 30 is an RS flip-flop. , 33 is a comparison circuit that compares the contents of the counter 27 with the contents of the latch circuit 28, and _G20 is an RS flip-flop 30.
It is a cage that is opened and closed by. Note that these circuits are preferably constructed of C-MOS elements in order to save power consumption.

Next, the operation of this circuit will be explained.

Liquid level detection using this circuit repeats the same operation, but if we start the explanation from a state where no charge is stored in the capacitor Cx connected in parallel with the temperature sensor Th, in this state, the synchronous pulse generation circuit 24
A reset signal as shown in FIG. 3(a) is output from. This reset signal is input to the reset terminal R of the flip-flop circuit 30 and the reset terminal R of the counter 27, and resets both.

That is, the output of each bit of the counter 27 is all initialized by this signal and becomes a low level output, and a low level signal is output from the output terminal Q of the flip-flop 30 as shown in FIG. 3C. and turn off the analog switch 26,
Disconnect both terminals of capacitor Cx from a short-circuited state to a non-shorted state.

Furthermore, when a high level signal is being output from the other output terminal, gate G ₂₀ is open.
The same voltage as the charging pulse signal generated by the synchronization pulse generation circuit 24 is generated on the output line.

The synchronizing pulse generating circuit 24 sends a charging pulse onto the charging pulse signal line following the reset signal as shown in FIG. 3B. This charging pulse is input to an analog switch 25 and a gate _G20 , and each time a charging pulse occurs, the analog switch 25 closes, and the capacitor Cx is connected to a high potential via a resistor _R2 , and is charged little by little. The voltage between the terminals of capacitor Cx gradually increases. By repeating charging, the capacitor
The voltage across the terminals of Cx is determined by resistor R ₁ and temperature sensor Th
When the comparator 29 reaches the reference voltage Vs determined by , it outputs a high level signal to set the flip-flop 30. Therefore, as shown in FIG. 3C, a low level signal is output from the output terminal Q of this flip-flop 30 and the gate G ₂₀
is closed to prevent the charging pulse from passing through this gate _G20 , and a high level signal from the output terminal Q turns on the analog switch 26 to discharge the charge stored in the capacitor Cx.

In this way, the charging pulse from the start of charging of the capacitor Cx until the voltage across the terminals of the capacitor Cx reaches the reference voltage Vs passes through the gate _G20 and is input to the counter 27, and the counter 27 counts the number of charging times. Ru.

Further, when the above operation is performed, the synchronous pulse generation circuit 24 inputs the first measurement pulse and the second measurement pulse to the comparison circuit 31, and the comparison circuit 31 that receives these pulses calculates the contents of the counter 27. and the contents of the latch circuit 28, and when they become equal, a high level signal is input to the gate terminal of the latch circuit 28, and after the counter 27 stops counting, the contents of the counter 27 are input through the latch circuit 28. The output signal is output to the display 16 side. That is, as the temperature of the liquid in the inner container 4 increases, the resistance value of the temperature sensor Th increases and the reference voltage Vs rises, and the number of times of charging required to charge until the voltage between the terminals of the capacitor Cx reaches the reference voltage Vs increases. The liquid temperature is measured by the number of charging cycles.

Also, when the power supply voltage decreases, the voltage applied to capacitor Cx decreases, but resistor _R1 and temperature sensor
Reference voltage Vs of comparator 29 divided by Th
also decreases in proportion to the power supply voltage, so the capacitor Cx
The number of pulses required for charging does not change, therefore, accurate liquid temperature detection is possible by counting the number of pulses.

Note that as the liquid temperature increases, the latch circuit 28 changes the output line from the first stage output line corresponding to the first stage at the bottom stage of the liquid temperature display section 31 of the display 16 to the fourth stage at the top stage.
High level signals are gradually output to many output lines up to the fourth stage output line corresponding to the fourth stage. For example, when the liquid temperature is close to room temperature, a low level signal is output to all output lines, and when it is close to the boiling point, a high level signal is output to all output lines, and furthermore, a display proportional to the liquid temperature is displayed. The width of the charging pulse and the number of digits of the counter 27 are set as follows.

In addition, the display 16 is a display using a liquid crystal, and only the cement that is given a potential different from the potential input to its common terminal lights up. However, in order to protect the liquid crystal, the common terminal is connected to the periodic pulse. A liquid crystal driving pulse of several tens of hertz, as shown in FIG. 4A, generated by the generating circuit 24 is input.

Therefore, a segment to which a pulse whose phase is inverted as shown in FIG. 3B is input is lit, and a segment to which a pulse having the same phase as the liquid crystal driving pulse as shown in FIG. 1B is not lit.

FIG. 5 is an electrical circuit diagram of a pot equipped with not only a liquid temperature display function but also a liquid volume display function.The difference from the above embodiment is that the spout pipe 6 itself is made of a conductive material such as stainless steel. In addition, the inner container 4
A tape 39 made of a conductive material such as aluminum is attached to the outer periphery of the capacitor Cy to form a capacitor Cy whose capacitance changes depending on the amount of liquid. A liquid crystal for displaying the liquid quantity is arranged in parallel, a latch circuit 34 and a comparison circuit 35 are provided for displaying the liquid quantity, and selectors 36 and 37 that selectively perform the liquid temperature display operation and the liquid quantity display operation are provided. ,3
It is only the point where 8 is provided.

Therefore, when the liquid temperature display operation is selected by the select pulse output from the synchronous pulse generation circuit 24, the capacitor Cy does not operate.
Further, since the output of the counter 27 is inputted only to the latch circuit 28 for liquid temperature display and the comparison circuit 33, the liquid temperature can be detected and displayed in the same manner as in the above embodiment.

On the other hand, when liquid volume display operation is selected, capacitor Cy operates instead of capacitor Cx,
The reference voltage Vs is obtained by a fixed resistor _R3 instead of the temperature sensor Th, and the output of the counter 27 is input only to the latch circuit 34 for liquid level display and the comparison circuit 35, so the reference voltage Vs is a constant value. As the capacitance of the capacitor Cy increases, the capacitance of the capacitor Cy increases
It changes depending on the amount of liquid inside. Then, if the capacitance of capacitor Cy changes, the capacitor
Since the required number of charging pulses until the voltage between the terminals of Cy reaches the reference voltage Vs will change, this required number of charging pulses is counted and input to the display 16 through the latch circuit 34 for displaying the liquid amount. By doing so, the liquid amount can be displayed in several stages (seven stages in the case of the figure).

In this embodiment, since the liquid temperature display and the liquid volume display are repeated alternately, the user can be easily notified of the liquid temperature and the liquid volume, making it even more convenient to use.

It should be noted that the present invention is not limited to the above-described embodiments; for example, a negative characteristic thermistor can be used as a temperature sensor, and it is possible to display whether the temperature is higher or lower than the temperature at which the resistance of the negative characteristic thermistor suddenly changes. Various design changes can be made without changing the gist of the invention.

<Effects of the Invention> According to the present invention, the temperature inside the pot can be easily checked from the front. Moreover, since the installation of the temperature display is done by making effective use of the existing space,
No special installation space is required for installing the temperature indicator, and the appearance of the pot does not become larger due to the installation of the temperature indicator.

Further, both the temperature sensor and the temperature display are attached to the exterior case side, and it is relatively easy to arrange lead wires for electrically connecting the two.

In particular, since the sloped surface on the front of the water filling cover is sloped from above to the outside and away from the exterior case, the display surface provided along the sloped surface is useful for the user when pouring water. This is an angle that allows for very good visibility.

Therefore, in this invention, before pouring out the liquid in the inner container, the user can check the temperature of the liquid in the inner container and refrain from pouring water if the liquid temperature is lukewarm. It can be made into a practical pot that is easy to use and does not cause any inconvenience.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of the pot, FIG. 2 is an electric circuit diagram of the same as above, FIGS. 3 and 4 are pulse time charts, and FIG. 5 is an electric circuit diagram showing another embodiment. 1... Exterior case, 4... Inner container, 6... Output pipe, 16... Display, Th... Temperature sensor.

Claims (1)

[Claims] 1. The liquid in the inner container housed in the outer case,
A pot that is guided above the inner container by a dispensing pipe and discharged to the outside by a discharge pipe arranged diagonally downward from above the inner container in a direction away from the inner container, which has the above contents. a temperature sensor for detecting liquid temperature disposed in the container; a water injection cover provided on the exterior case to cover the discharge pipe and whose front surface is an inclined surface along the discharge pipe; and an inclined surface of the water injection cover. and the discharge pipe, the display being electrically connected to the temperature sensor by a lead wire provided in the outer case. , which displays the temperature detected by the temperature sensor, and has a liquid temperature display function characterized in that the temperature display surface of the display is faced through a display window formed on the inclined surface of the water injection cover. A pot to have. 2. A pot having a liquid temperature display function according to claim 1, wherein the temperature sensor is attached to the water injection pipe. 3. A pot having a liquid temperature display function according to claim 1, wherein the pot also has a liquid volume display function.