JPH11148870A - Temperature detecting device for heat reserving container and heat reserving container housing body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the temperature of the content in a heat reserving container detectable without receiving any influence from the surface level, etc., of the content. SOLUTION: A temperature detecting device for a heat reserving container is provided with a temperature detector A which detects the temperature of the content in a heat reserving container 11 containing warm water, chilled water, etc., and is positioned to the opening of the container 11 so that the detector A may detect the temperature of the steam from the content or infrared rays radiated from the content. The detecting device accurately detects the temperature of the content by detecting the temperature of the steam from the content when the temperature of the content is higher than the ambient temperature or detecting the infrared rays radiated from the content when the temperature of the content is lower than the ambient temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature detecting device for a heat insulating container and a heat insulating container housing provided with the temperature detecting device. More specifically, the present invention relates to a vacuum container made of glass such as a thermos or a vacuum double made of metal such as stainless steel. The present invention relates to a temperature detecting device used for a vacuum heat insulating container such as a bottle, an electric rice cooker with an electronic jar, and the like, and relates to a heat retaining container housing equipped with the temperature detecting device.

[0002]

2. Description of the Related Art As is well known, there is a thermos as a container for keeping warm and cool, and as an aggressive keeping container, there is an electric pot or the like which maintains the temperature by heating the temperature of the contents with a heater. The rice cooker is also provided with an electronic jar function. Containers such as electric pots are usually made of metal such as stainless steel. In such a container, the temperature of the contents in the container can be detected by detecting the temperature of the container wall with the temperature sensor attached to the container wall in the water temperature detection in the container. However, in measuring the temperature of the contents of a glass vacuum vessel such as a thermos bottle, it is impossible to insert a temperature sensor from the side wall of the vacuum vessel. Such a function is not added to the thermos. In a rice cooker with an electronic jar, a heater for keeping heat is provided on a side surface, and a temperature sensor for measuring the temperature is provided on a side wall portion.

[0003]

When the thermal insulation container is made of metal such as stainless steel, the temperature of the water in the container is detected by attaching a temperature sensor to the container wall and detecting the temperature of the container wall. The temperature of the contents can be easily detected. However, in a container such as a thermos made of glass, etc.,
Because of the double structure and the structure in which the space between the container walls is evacuated, it is impossible to attach a temperature sensor to the outer wall of the container to detect the temperature inside the container.

Therefore, when detecting the temperature of hot water or the like in a thermos, a method is generally used in which a temperature sensor is inserted directly into the contents to detect the temperature. However, this method has hygienic problems and is not installed in ordinary thermos bottles. If the temperature of the contents of the thermos is measured by inserting the temperature sensor into the contents, do not arrange the temperature sensor so that it reaches the bottom of the container, considering the amount of the contents in the container. As long as the temperature of the contents cannot be measured accurately, there is a disadvantage. Furthermore, when a solid substance such as ice is put in the container, when the temperature sensor takes in and out the contents,
There are various problems such as an obstacle to the temperature sensor or processing of a lead wire of the temperature sensor in the container, which is not practical.

On the other hand, in a heat-insulating metal container, the temperature of the contents is detected by installing a temperature sensor on the side of the container. However, the temperature sensor is installed at a fixed position. Depending on the installation position, the temperature of the contents cannot be accurately detected. That is, when the water level in the container fluctuates and the water level is lower than the installation position of the temperature sensor, there is a disadvantage that the temperature of the contents cannot be accurately detected. Therefore, these devices having a metal inner pot or container such as a rice cooker or an electric pot, and having a temperature sensor installed on the inner pot or the outer wall of the container, can accurately detect when the water level of the contents in the container fluctuates. There is a disadvantage that the temperature cannot be detected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has a heat insulation container capable of detecting the temperature of the contents without depending on the water level of the contents in the container. It is an object of the present invention to provide a temperature detecting device for use and a heat retaining container housing.

[0007]

Means for Solving the Problems The present invention has been made to achieve the above object, and the invention of claim 1 has the following features.
As a temperature detector that detects the temperature of the contents of the heat retaining container containing the contents such as hot water and cold water, the temperature detector can detect the vapor temperature of the contents or infrared rays emitted from the contents,
A temperature detecting device for a heat insulating container, wherein the temperature detecting device is disposed at an opening of the heat insulating container. According to the present invention, when the temperature of the contents in the container is higher than the ambient temperature, the steam temperature in the container is detected, and when the temperature of the contents in the container is lower than the ambient temperature, the contents in the container are mainly detected. The temperature of the contents is detected by detecting the infrared rays emitted from.

Further, the invention according to claim 2 is characterized in that the temperature detector comprises a case, a resin film provided on one surface of the case, and a heat detecting element for detecting a vapor temperature provided on the back side of the resin film. 2. The temperature detecting device for a heat retaining container according to claim 1, further comprising a temperature compensating thermosensitive element for compensating a temperature detected by said steam temperature detecting thermosensitive element. According to the present invention, the thermosensitive element for detecting a vapor temperature is fixedly adhered to the resin film, and the resin film is made of a material that easily absorbs heat. Even if the number is small, the temperature of the contents can be accurately detected.

According to a third aspect of the present invention, the thermosensitive element for temperature compensation is provided inside the temperature detector or outside the temperature detector. It is a temperature detector for heat retention containers of the above. According to the present invention, a position at which the ambient temperature can be detected more accurately is selected, and the temperature of the thermosensitive element for steam temperature detection is corrected based on the output of the thermosensitive element for temperature compensation to accurately detect the temperature of the content. be able to.

A fourth aspect of the present invention provides a temperature display for displaying the temperature of the contents from the temperature detector and the temperature detector on a cover member of a storage body for storing the heat insulation container such as the vacuum heat insulating container. And a container is arranged.
4. A temperature detecting device for a heat retaining container according to 2 or 3. According to the present invention, the temperature of the contents is displayed on the temperature display provided on the cover member of the storage body, so that the external lead wire of the temperature detector can be easily processed.

According to a fifth aspect of the present invention, the heat insulating container is a vacuum heat insulating container of a thermos bottle, a pot of an electric rice cooker with an electronic jar, or a container of an electric pot. 4. A temperature detecting device for a heat retaining container according to item 3. According to the present invention, there is provided a temperature detecting device for a heat retaining container having a function of accurately measuring the temperature of the contents in these containers.

A sixth aspect of the present invention provides a vacuum heat insulating container for a thermos bottle, a pot of an electric rice cooker with an electronic jar, or a lid member of a storage body for storing an electric pot container. And a temperature detector including a temperature indicator for displaying the temperature of the contents from an output signal from the container. According to the present invention, there is provided a heat retaining container housing having a function of accurately measuring and displaying the temperature of contents in these containers.

As described above, in the temperature detecting device for a heat insulating container of the present invention, the temperature detector is disposed so as to be in close contact with the opening (gate) of a vacuum heat insulating container such as a thermos, and the temperature detecting surface is vacuum. It is arranged so as to face inside the heat insulating container.
Specifically, it is installed on the back side of the upper lid of the housing body of the vacuum heat insulating container, and the temperature detection surface of the temperature detector is arranged at a position where it does not block infrared rays from the contents. Therefore, infrared light radiated from the contents lower than the ambient temperature reaches the detection surface of the temperature detector, and the temperature in the container can be accurately detected. If the temperature is higher than the temperature, the temperature of the content can be detected by detecting the temperature of the steam generated from the content. Moreover, it is a heat insulation container housing provided with such a heat insulation container temperature detecting device. Furthermore, the temperature detector of the temperature detector for a heat retaining container of the present invention detects the ambient temperature by providing the temperature compensation thermosensitive element inside the temperature detector or outside the temperature detector, thereby detecting the contents. Even when the temperature is lower than the ambient temperature, the temperature of the contents can be accurately detected.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a temperature detecting device for a heat retaining container and a temperature detecting device for a heat retaining container according to the present invention. First, a temperature detector of a temperature detecting device for a heat retaining container of the present invention is shown in FIG.
This will be described with reference to FIG. FIG. 1A is a perspective view of FIG.
(B) is a cross-sectional view along the XY line. In the temperature detector A shown in FIG. 1, a resin film 2 is disposed at an open end of a case 1 made of a resin or the like, and a thermosensitive element 3 for detecting a vapor temperature by a thermistor or the like is provided on the inner surface side of the case 1 of the resin film 2 with an adhesive or the like. It is fixed in close contact. Lead wire 4 of thermal element 3
Are connected to an external lead wire 6 via a relay board 5. Reference numeral 7 denotes a lid member for closing the other open end of the case 1. The resin film 2 is a resin such as polyester, for example, and is preferably made of a material having good heat absorption. Also,
The lid member 7 or the resin film 2 may be formed integrally with the case 1.

Subsequently, referring to FIGS. 2 (a) to 2 (c),
Another embodiment of the temperature detector A will be described. In the embodiment of FIG. 2, the same parts as those of FIG. 1 are denoted by the same reference numerals. In the temperature detector A shown in FIG. 1A, a thermosensitive element 3 for detecting a vapor temperature is fixed to a resin film 2 provided at one open end of a case 1 with an adhesive or the like inside the case. . A temperature-compensating thermosensitive element 3 ′ is closely fixed to the inside of the case 1 with an adhesive or the like on the lid member 7 at the other open end of the case 1. The thermal element 3 and the thermal compensation element 3 ′ for temperature compensation are provided in the cavity 8 in the case 1, and the thermal insulation is maintained by the air layer of the cavity 8.

The temperature detector A shown in FIG. 1B is an embodiment in which the thermal insulation between the steam temperature detecting thermosensitive element 3 and the temperature compensating thermosensitive element 3 ′ is held by the foamable resin layer 9. . Also,
In the temperature detector A shown in FIG. 3C, a thermosensitive element 3 for detecting a vapor temperature is fixed to the resin film 2 by an adhesive or the like, the thermosensitive element 3 is adhered to the resin film 2, and the resin film 2 is thermally insulated. The thermal element 3 is sandwiched between the film 10 and the resin substrate 7 ′.
The temperature-compensating thermosensitive element 3 'is adhered to the heat-insulating film 10 and the heat-insulating film 10 and the resin substrate 7' are adhered and fixed so as to sandwich the temperature-compensating thermosensitive element 3 '. The thermal element 3 may be arranged at a fixed position in the center, and the thermal element 3 'for temperature compensation may be arranged at a peripheral position.

FIG. 3 shows another embodiment of the temperature detector of the temperature detecting device for a heat retaining container according to the present invention. FIG. 1A is a perspective view of a temperature detector, and FIG. 1B is a cross-sectional view thereof. The temperature detector A shown in FIG. 1 is provided with, for example, a resin film 2 to which a thermosensitive element 3 for detecting steam temperature is adhered and fixed at one open end of a cylindrical case 1. A substrate 7a to which the temperature-compensating thermosensitive element 3 'is adhered and fixed is provided on the way. Of course,
Case 1 may be rectangular. And the thermal element 3
And the lead wire 4 of the temperature-compensating thermosensitive element 3 ′ are connected to the external lead wire 6, respectively. When the temperature-compensating thermosensitive element 3 'is provided outside the temperature detector A, it is not necessary to house it inside the temperature detector A. The diameter of the cylindrical case 1 is about 5 to 10φ.

FIGS. 4 (a) and 4 (b) are cross-sectional views showing an example of the use of the above embodiment, and show the main parts of a thermos bottle. In FIG. 4A, a storage body 12 is provided in a heat insulation container 11 which is a vacuum heat insulating container for maintaining the temperature of hot water, cold water or the like, and a female screw is formed in a lid member 18 which seals the storage body 12. By screwing the threaded case 13 to the female screw, the threaded case 13 is fixed to the lid member 18 by the packing 14, and the heat retaining container 11 is closed by the lid member 18, so that the contents in the container do not leak. Structure. The threaded case 13 is sealed with a sealing member 15. The temperature detector A of FIG. 2 is fixed to the outer bottom surface in the case 13 with a screw. Further, the temperature detector A of FIG. 4B is provided with the temperature detector A of FIG. The sealing structure of the container is as described above. The temperature detector A of FIG. 2 is housed in the case 13 with a thread, and the external lead wire 6 is connected to the case 13 with the thread.
It is inserted inside and pulled out. The resin film 2 serving as a detection surface is in close contact with the bottom surface of the case 13. Case 1
It is desirable that the thickness of the resin on the bottom surface of 3 is as thin as possible. The temperature detector may be formed by using the existing lid of the thermos as a case.

FIGS. 5A and 5B show another embodiment of the temperature detector according to the present invention, in which a temperature detector is formed on a lid of a storage container such as a thermos bottle. FIG. 5 shows a heat insulating container 11, which is a vacuum heat insulating container for maintaining the temperature of hot water, cold water or the like, provided in the housing body 12, and a lid member 18 for sealing the housing body 12.
The threaded case 13 provided with the packing 14 is screwed into the female screw formed in the above. The heat insulating container 11 is sealed by the lid member 18. FIG.
The threaded case 13 is made of resin, and the threaded case 1
Numeral 3 is sealed with a sealing member 15, and the thermosensitive element 3 for detecting a vapor temperature is tightly fixed to the resin film on the inner bottom surface of the threaded case 13 with an adhesive. The lead wire 4 is connected to an external lead wire 6 via a relay board 5 provided on the sealing member 15. FIG. 2B shows a thermosensitive element 3 for vapor temperature detection bonded to a resin film on the inner bottom surface of the threaded case 13 with an adhesive, and a thermosensitive element for temperature compensation attached to a sealing member 15 for sealing the threaded case 13. The element 3 'is adhered. These lead wires 4 are connected to an external lead wire 6 via a relay board 5 provided on the lid member 15. It is desirable that the thickness of the resin on the bottom surface of the case 13 be as thin as possible.

FIG. 6 shows a thermos as a heat-insulating container housing to which the temperature detecting device according to the present invention is attached. In this thermos, a heat insulating container 11 of a vacuum heat insulating container is provided in a storage body 12, a pumping pipe 17 is inserted into the heat insulating container 11 which is a vacuum heat insulating container, and a pressing portion 20 is provided on a lid member 18. ing. By compressing the bellows 19 by the pressing portion 20, the water surface is pressed and water can be taken out from a pipe communicating with the pumping pipe 17 inserted into the heat retaining container 11. A temperature detector A is mounted on the bottom of the lid member 18. The external lead 6 is connected to the lid member 18.
Is connected to a display 16 provided on the outer surface of. The display 16 has a circuit section for converting a temperature into a numerical value for dynamic display. In the case where the temperature detector A used in the heat-insulating container housing is shown in FIG. 2, the temperature detector A of FIG. 1 which includes a temperature compensation thermal element but does not include the temperature compensation thermal element is used. In such a case, by disposing a temperature-compensating thermosensitive element near the display 16,
The temperature of the contents from low to high can be detected. Although FIG. 6 is an embodiment of a thermos, it is clear that the present invention can be applied to an electric pot and an electric rice cooker with an electronic jar, and a detailed description thereof will be omitted.

As described above, in the temperature detecting device of the present invention, when the content of the vacuum insulated container is higher than the ambient temperature, the temperature of the vapor in the sealed space of the container is detected, and the content is detected as lower than the ambient temperature. In the case where the resin film is also low, it is most preferable to use a material having a good infrared absorptivity for the resin film because the structure detects infrared rays emitted from the contents. Further, as the resin film, polyester having a thickness of about 0.2 mm was used. Of course, in the case of a threaded case, it is necessary to have a thickness that maintains the mechanical strength of the lid.As a result, if there is a decrease in the temperature detection sensitivity, this decrease is predicted in advance and corrected by the circuit unit. Then, the temperature of the contents may be measured. In addition, the absorption of infrared light is almost 100%.
Thus, a resin film in which carbon black or an inorganic pigment is dispersed in a polyester as a base material may be used.

FIG. 7 illustrates the result of measuring the temperature of the contents of the thermos shown in FIG. FIG. 7 (a) shows the contents (boiled water) placed in a thermos, and the opening (gate) of the thermos.
FIG. 7 (b) shows the result of measuring the temperature of the content with a thermosensitive element for detecting a vapor temperature by attaching the temperature detecting device of the present invention to the lid portion in which is sealed. The result of measuring the temperature of the contents lower than the temperature is shown, and the detected temperature difference between the steam temperature detecting thermosensitive element and the temperature compensating thermosensitive element is shown.

Hot water is poured into the thermos of FIG. 6, and the space sealed with the screw case is filled with steam. The thermo-sensitive element for detecting the vapor temperature of the temperature detector A installed at the opening of the thermos is:
Detects the temperature of the space filled with steam. That is, FIG.
As is clear from the characteristic curve (a) of (a), in the region where the ambient temperature is about 25 ° C. or more, the temperature of the contents and the temperature detected by the steam temperature detecting thermosensitive element of the temperature detecting device of the present invention are different. The temperature is substantially linear, and by detecting the temperature of the steam in the sealed space in the container, it is clear that the temperature of the steam is almost the temperature of the contents.

However, in a region where the temperature of the contents is lower than the ambient temperature, the temperature detected by the steam temperature detecting thermal element hardly changes regardless of the temperature of the contents. That is, if the temperature of the contents is lower than the ambient temperature,
The method of detecting the vapor temperature of the sealed space in the container cannot detect the temperature of the contents. From the above, it is clear that the measurement of the temperature of the contents in the vacuum insulated container can detect the temperature of the contents using the vapor-temperature detection thermosensitive element when the temperature of the contents is higher than the ambient temperature. Become.

On the other hand, when the temperature of the contents is lower than the ambient temperature, the temperature of the contents cannot be measured only by the thermal element for detecting the steam temperature, but is measured by providing the thermal element for temperature compensation. be able to. For example, by putting cold water into a thermos, the temperature of the contents becomes lower than the ambient temperature. In this case, as shown in FIG. 7B, a temperature difference appears between the thermal element for detecting the steam temperature and the thermal element for temperature compensation. That is, the vapor temperature detecting thermosensitive element detects the radiation temperature of infrared rays radiated from the contents. The temperature difference between these two thermosensitive elements is shown in FIG.
In this case, when the temperature of the contents is 0 ° C., the temperature is about 4 ° C., and a temperature difference occurs in proportion to the temperature of the contents. Therefore, in a region where the temperature of the content is lower than the ambient temperature, the temperature of the content can be detected in a non-contact manner by detecting this temperature difference.

FIG. 8 is a schematic diagram of a detecting circuit of the above-described temperature detecting device of the present invention. When the temperature Ts detected by the temperature sensor A for detecting the steam temperature of the temperature detector A is higher than the ambient temperature Tc (Ts ≧ Tc), the display converts the temperature Ts into a digital signal as the temperature of the contents and displays the liquid crystal. It is displayed on the display 16 such as a container. Also, the temperature Ts detected by the steam temperature detecting thermosensitive element is equal to the ambient temperature T measured by the temperature compensating thermosensitive element.
If it is lower than c (Ts <Tc), the temperatures of Ts and Tc are calculated by the arithmetic circuit 21 and the result is displayed. The arithmetic circuit 21 includes a comparator for comparing the outputs of the thermosensitive element for detecting the steam temperature and the thermosensitive element for compensating for the temperature. According to the output from the comparator, the output of the thermosensitive element for detecting the steam temperature, Alternatively, the output difference (temperature difference) between the steam temperature detecting thermosensitive element and the temperature compensating thermosensitive element is determined and displayed as the temperature of the contents. In the case of a temperature difference, a value obtained by subtracting the temperature difference from the output of the thermal element for detecting steam temperature is used as the temperature of the content.

In the above-described embodiment, the temperature detecting device having a structure in which the temperature-compensating thermosensitive element is integrated in the case and the structure provided near the display device are disclosed. However, the temperature-compensating thermosensitive element may be located at any place as long as it can detect the outside air temperature of the heat-insulating container housing such as a thermos, and is not limited to the embodiment.

[0028]

As described above, according to the present invention, the temperature of the contents in a container such as a vacuum heat insulating container can be easily measured from a low temperature to a high temperature by a non-contact method. This has the advantage that, especially when the temperature of the contents of the container is lower than the ambient temperature, the contents in the insulated container can be detected by its vapor temperature and the infrared light emitted by the contents. is there.

Further, according to the present invention, since the temperature detector is not immersed in the contents, there is an advantage that it is hygienic and there is an advantage that there is no problem in taking in and out the contents.
Further, according to the present invention, as shown in FIG. 9, there is an advantage that the temperature can be measured irrespective of the amount (water amount) of the contents in the container.

Further, according to the present invention, the temperature of the contents can be accurately detected irrespective of the amount of the contents of the vacuum insulated container of the thermos, the pot of the electric rice cooker with the electronic jar, or the container of the electric pot. It is possible to provide a temperature detecting device capable of providing such a temperature detecting device, and to provide a heat retaining container provided with such a temperature detecting device.

[Brief description of the drawings]

FIG. 1 (a) is a partially exploded perspective view showing an embodiment of a temperature detector of a temperature detecting device for a heat retaining container according to the present invention,
(B) is a sectional view thereof.

FIGS. 2A to 2C are cross-sectional views of another embodiment of the temperature detector of the temperature detecting device for a heat retaining container according to the present invention.

FIG. 3A is a perspective view showing another embodiment of the temperature detector of the temperature detecting device for a heat retaining container according to the present invention, and FIG.
Is a sectional view of the same.

FIGS. 4A and 4B are cross-sectional views showing a temperature detector installed in the heat-insulating container housing of the present invention.

5 (a) and 5 (b) are cross-sectional views showing one embodiment of a temperature detector of the heat retaining container housing of the present invention.

FIG. 6 is a cross-sectional view showing one embodiment of a temperature detecting device for a heat retaining container according to the present invention.

FIGS. 7A and 7B are diagrams for explaining an embodiment of the present invention.

FIG. 8 is a block diagram schematically showing a circuit of the temperature detecting device according to the present invention.

FIG. 9 is a diagram showing the relationship between the amount of water in the container and the detection ability according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Resin film 3 Thermal element for vapor temperature detection 3 'Thermal element for temperature compensation 4 Lead wire 5 Relay board 6 External lead wire 7 Lid member 7' Resin substrate 8 Hollow part 9 Foaming resin 10 Thermal insulating film 11 Insulation container 12 Storage body 13 Threaded case 14 Packing 15 Sealing member 16 Temperature indicator 17 Pumping pipe 18 Lid member 19 Bellows 20 Pressing member

Claims (6)

[Claims] 1. A temperature detector for detecting the temperature of the contents of an insulated container containing contents such as hot water and cold water so as to detect a vapor temperature of the contents or infrared rays radiated from the contents. A temperature detecting device for a heat insulating container, wherein the temperature detecting device is disposed at an opening of the heat insulating container. 2. The temperature detector, wherein the temperature detector comprises a case, a resin film provided on one surface of the case, a steam temperature detecting thermosensitive element provided on a back surface side of the resin film, and the steam temperature detecting thermosensitive device. 2. A temperature compensation thermosensitive element for compensating a temperature detected by the element.
4. The temperature detecting device for a heat retaining container according to claim 1. 3. The temperature detector according to claim 2, wherein the temperature-compensating thermosensitive element is provided inside the temperature detector or outside the temperature detector. apparatus. 4. The method according to claim 1, wherein the temperature detector and a temperature indicator for displaying the temperature of the contents from the temperature detector are arranged on a cover member of a storage body for storing the heat insulating container such as the vacuum heat insulating container. The temperature detecting device for an insulated container according to claim 1, 2, or 3. 5. The heat insulating container according to claim 1, wherein the heat insulating container is a vacuum heat insulating container of a thermos bottle, a kettle of an electric rice cooker with an electronic jar, or a container of an electric pot. Temperature sensing device. 6. A temperature sensor and an output signal from the temperature sensor are provided on a lid member of a vacuum heat insulating container of a thermos bottle, a pot of an electric rice cooker with an electronic jar, or a storage body for storing a container of an electric pot. A heat-insulating container housing, comprising a temperature detecting device provided with a temperature indicator for displaying the temperature of an object.