JPH06269354A - Electric jar - Google Patents

Abstract

PURPOSE:To provide an electric jar which can heat cold water and retain the temperature as hot water, and at the same time, has a cooling function to cool the hot water to a specified temperature quickly. CONSTITUTION:The electric jar is equipped with a heating means 8 which heats water in a container 6, temperature sensor 9 which measures the temperature of the water, temperature selecting button 2 which switches a temperature to be retained of the water, radiating fin which has a base surface at both ends, first heat-exchanger 15 which is attached on the base surface on one side through a Peltier element, second heat-exchanger 16 which is attached to be in contact with the other base surface, cooling fan 17 which blows air to the radiating fin, electric pump 14 which circulates water to the first and second heat-exchangers, and a control unit 32 which controls the electric pump and heating means by receiving the information of the temperature sensor and temperature selecting button.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric jar pot capable of heating a liquid to retain it as hot water and having a cooling function for cooling the hot water to a predetermined temperature.

[0002]

2. Description of the Related Art Conventionally, when making a beverage such as infant milk, sencha, gyokuro, etc. using an electric jar pot, take out hot water that has been kept warm in the boiling state and leave it until it reaches an appropriate temperature. The natural cooling method is adopted. In addition, when drinking cold water, the liquid taken out from the jar pot is placed in a kettle, cooled once with tap water to an appropriate temperature, and then cooled in a refrigerator.

[0003]

However, according to the conventional method, it takes about 3 hours to cool 3 liters of boiling water to 70 ° C. by natural cooling, and 30- It takes 6 to 7 hours to cool 40 ° C. water to 10 ° C. in a refrigerator.

The present invention solves the above-mentioned conventional problems, and can heat a liquid to keep it hot water.
A first object is to provide an electric jar pot that also has a cooling function capable of quickly cooling this hot water to a predetermined temperature. A second object is to provide an electric jar pot that can perform effective cooling according to the temperature setting.

[0005]

The first means of the present invention for achieving the first object is a heating means for heating a liquid in a container, a sensor for detecting the temperature of the liquid, and a keeping temperature of the liquid. Temperature selection button, a heat radiation fin having base surfaces at both ends, a first heat exchanger provided on the one base surface via a Peltier element, and a first heat exchanger provided in contact with the other base surface. A second heat exchanger, a cooling fan that blows air to the radiating fins, an electric pump that circulates liquid through the first and second heat exchangers, a temperature detection sensor, and a temperature selection button information The electric jar pot is provided with a control device for controlling the electric pump / heating means.

The second means of the present invention for achieving the second object is, in addition to the first means, the control device is such that while the temperature detected by the temperature detecting sensor is higher than the reference temperature, This is an electric jar pot in which the liquid is circulated in the heat exchanger and when the temperature detected by the temperature detecting sensor becomes lower than the reference temperature, the Peltier element is energized to circulate the liquid in the first heat exchanger.

[0007]

The first means of the present invention is to provide two heat exchangers, a first heat exchanger and a second heat exchanger, on the base surface provided at both ends of the radiation fin.
It serves as an electric jar pot having a cooling function capable of quickly cooling the boiling water in the container to the intended liquid temperature by miniaturizing the heat exchange section.

The second means of the present invention uses the second heat exchanger while the liquid temperature is higher than the reference temperature and uses the Peltier element when the liquid temperature is lower than the reference temperature while using the Peltier element. It uses a vessel to provide effective cooling.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. The main body 1 has a temperature selection button 2 selected by the user at the front, an intake port 3 at the bottom, an exhaust port 4 at the rear, and a container 6 for storing a liquid 5 such as water inside. ing. Reference numeral 7 denotes an upper lid that closes the opening of the container 6 when closed, and is provided on the main body 1 so as to be openable and closable. On the bottom surface of the lower portion of the container 6, a heating means 8 including a heater for heating the liquid 5 stored in the container 6 is provided. A temperature detecting sensor 9 for detecting the temperature of the liquid 5 is attached to the lower side surface of the container 6. A first electric pump 10 and a second electric pump 14 are provided between the main body 1 and the container 6. The first electric pump 10 pumps the liquid stored in the container 6 from the bottom of the container 6 through the pumping pipe 12 to the spout 13 by the user rotating or pushing the operating knob 11. The second electric pump 14 is
When cooling the high temperature liquid stored in the container 6, this liquid is circulated between the container 6 and the first heat exchanger 15 or the second heat exchanger 16. Reference numeral 17 denotes a cooling fan, which blows air to the radiating fins 18 to which the first heat exchanger 15 and the second heat exchanger 16 are attached for cooling. The radiating fin 18 has base surfaces 28 and 31 on both sides, and the first heat exchanger 15 is provided on one base surface 28 and the other base surface 3 is provided.
The second heat exchanger 16 is attached to the No. 1. Reference numeral 19 is a drive motor for the cooling fan 17.

Next, based on FIG. 3, the first heat exchanger 15
The cooling unit formed by the second heat exchanger 16 will be described. The pumped water from the second electric pump 20 enters the first heat exchanger 15 or the second heat exchanger 16 from the bottom of the container 6 through the switching valve 20. The two heat exchangers have the following configurations. Reference numeral 21 denotes a heat exchange container that constitutes the housing, and in this embodiment, resin, stainless steel or the like is used. In the heat exchange container 21, the second electric pump 1
An inflow pipe 22 for taking in the circulating water from No. 4 and an outflow pipe 23 as an outlet of the circulating water are provided. Further, the heat exchange container 21 is fixed to the heat exchange plate 25 and the screw 26 with the packing 24 interposed therebetween, whereby the heat exchange plate 25 and the heat exchange container 21 are connected to the inflow pipe 22 and the outflow pipe 23. The circulation channel 27 that communicates is formed. Heat exchange plate 25
For this purpose, it is necessary to use a metal having a functionally high thermal conductivity, for example, a metal such as aluminum or copper, and in this embodiment, the surface that comes into contact with the liquid is subjected to surface treatment with high corrosion resistance. That is, when the material is aluminum, the surface is subjected to an alumite treatment or a treatment for coating the surface with a tetrafluoroethylene resin. In the case of copper, the surface is chrome-plated. When no surface treatment is applied to the heat exchange plate, a clad plate of aluminum and stainless steel, a clad plate of copper and stainless steel, or the like is used.

In the first heat exchanger 15, a screw 30 is formed by interposing a Peltier element 29 on the base surface 28 of the heat radiation fin 18.
Tighten it tightly. That is, the action of the Peltier element 29 is also used to cool the circulating water. The second heat exchanger 16 is directly tightened and tightly attached to the other base surface 31 of the heat radiation fin 18 with a screw 30. In this way, heat is exchanged between the high-temperature circulating water and the air to cool it.

The heat exchange plate 25 may be omitted from the second heat exchanger 16 by subjecting the base surface 31 of the radiation fin 18 to the surface treatment as described above.

Next, the operation of this embodiment will be described. When used as a normal electric jar pot, it is operated by the user putting the liquid in the container 6 and closing the upper lid 7 to energize. That is, the heating means 8 is turned on to heat the liquid to a boiling state and keep the temperature in this state. When hot water is required in this state, the user operates the operation knob 11
When rotating or pushing, the first electric pump 1
0 can be operated to pump hot liquid from the bottom of the container 6 to the spout 13 to supply hot water to the outside.

Next, the case where it is desired to use low temperature hot water will be described. The user operates the temperature selection button 2 and the temperature is about 40 ° C.
When the temperature is set higher than the above, the control device 32 immediately activates the second electric pump 14 and the drive motor 19 when the liquid in the boiling state is already kept warm. That is, high temperature water is circulated between the container 6 and the cooling unit until the temperature detecting sensor 9 detects the set temperature.
At this time, in this embodiment, the switching valve 20 is controlled so that the second heat exchanger 16 side serves as a circulation path. The water thus flowing into the second heat exchanger 16 is heat-exchanged by the cooling fan 17 while circulating in the second heat exchanger 16. That is, the conduction heat from the high temperature liquid is transferred to the heat exchange plate 25 and the base surface 31 of the heat dissipation fin 18,
The base surface 31 of the heat radiation fin 18 is cooled by the cooling fan 17. The liquid thus heat-exchanged to have a low temperature is discharged from the outflow pipe 23 and returns to the inside of the container 6. When this circulation is repeated and the temperature of the liquid in the container 6 is cooled to the set temperature, the control device 32 instructs the circulation to be stopped.

When the temperature selection button 2 is first operated to set a temperature higher than about 40 ° C., the liquid is boiled once and then the temperature detecting sensor 9 is activated to be cooled to a predetermined temperature. .

When the temperature set by the user is lower than about 40.degree. C., the controller 32 executes the cooling operation of circulating the second heat exchanger 16 up to about 40.degree. After that, the switching valve 20 is switched to the first heat exchanger 15 side while the Peltier element 29 is energized to operate the Peltier element 29. The liquid of about 40 ° C. flowing into the first heat exchanger 15 is deprived of heat by the Peltier element 29, and the conduction heat conducted to the base surface 28 is cooled by the cooling fan 17 to reach a predetermined temperature. It is a thing.

In this embodiment, as described above, the second heat exchanger 16 is used when the set temperature is about 40 ° C. or higher, where the liquid temperature is higher than the temperature near the ambient temperature.
This is because the heat absorption effect of the Peltier element 29 greatly differs with this ambient temperature as a boundary. That is, when the liquid temperature is about 40 ° C. or higher, which is higher than the temperature near the ambient temperature, the cooling effect is higher when the heat is directly transferred from the heat exchange plate 25 to the heat radiation fins 18. When the liquid temperature is lower than around the ambient temperature, the amount of heat absorbed by the Peltier element 29 is larger than the amount of heat that is directly transferred from the heat exchange plate 25 to the heat radiation fins 18, and therefore, in this case, the first heat exchanger. 15 is used.

At this time, the air that is heat-exchanged with the high temperature liquid is taken in through the intake port 3 provided at the bottom of the main body 1,
It is discharged from an exhaust port 4 provided at the rear of the main body 1. Further, in this embodiment, as the heat exchange container 21, a plastic such as polycarbonate / polypropylene or the like, which is not corroded by a liquid, or stainless is used.
Further, the heat exchange plate 25 has a surface contacting with the circulating hot water,
Surface treatment with high corrosion resistance is applied. Therefore, there is no possibility that metal ions or the like will be dissolved in the circulating water.

In practice, there is no problem even if both the first heat exchanger 15 and the second heat exchanger 16 are used when the liquid temperature is higher than about 40.degree. is there.

[0020]

The first means of the present invention has a heating means for heating the liquid in the container, a sensor for detecting the temperature of the liquid, a temperature selection button for switching the heat retention temperature of the liquid, and a base surface at both ends. A radiating fin, a first heat exchanger provided on the one base surface through a Peltier element, a second heat exchanger provided in contact with the other base surface, and air blown to the radiating fin A cooling fan, an electric pump that circulates a liquid through the first and second heat exchangers, and a control device that receives information from the temperature detection sensor and a temperature selection button to control the electric pump / heating means With such a configuration, an electric jar pot having a cooling function capable of downsizing the heat exchange portion and rapidly lowering the boiling liquid in the container to the liquid temperature for the purpose of use is realized.

According to a second means of the present invention, the controller circulates the liquid in the second heat exchanger while the temperature detected by the temperature detecting sensor is higher than the reference temperature, and the temperature detecting sensor detects the liquid. When the temperature becomes lower than the reference temperature, the Peltier element is energized to circulate the liquid in the first heat exchanger, which effectively utilizes the Peltier element and realizes an electric jar pot that can perform effective cooling. is there.

[Brief description of drawings]

FIG. 1 is a sectional view of an electric jar pot according to an embodiment of the present invention.

FIG. 2A is a plan view showing a heat exchanger portion of the electric jar pot, FIG. 2B is a side view showing the same portion in a broken manner, and FIG. 2C is a sectional view taken along line AA of FIG. 2B.

FIG. 3A is a side view showing a main part of the heat exchanger, and FIG. 3B is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 2 Temperature Selection Button 6 Container 8 Heating Means 9 Temperature Detection Sensor 10 First Electric Pump 14 Second Electric Pump 15 First Heat Exchanger 16 Second Heat Exchanger 17 Cooling Fan 18 Radiating Fin 20 Switching Valve 29 Peltier element 32 control device

Claims (2)

[Claims] 1. A heating means for heating a liquid in a container, a liquid temperature detecting sensor, a temperature selection button for switching a heat retention temperature of the liquid, a radiating fin having base surfaces at both ends, and the one base surface. A first heat exchanger provided via a Peltier element, a second heat exchanger provided in contact with the other base surface, a cooling fan that blows air to the radiation fins, and the first and second heat exchangers. An electric jar pot equipped with an electric pump that circulates a liquid through a second heat exchanger, and a control device that receives information from the temperature detection sensor and a temperature selection button to control the electric pump / heating means. 2. The controller circulates the liquid in the second heat exchanger while the temperature detected by the temperature detecting sensor is higher than the reference temperature, and when the temperature detected by the temperature detecting sensor becomes lower than the reference temperature. The electric jar pot according to claim 1, wherein the Peltier element is energized to circulate the liquid in the first heat exchanger.