KR200474920Y1 - Portable immersion heaters with a water level sensing function - Google Patents

Abstract

In the present invention, both ends of the body case are formed to be bent in parallel with each other. The body case is inserted into the coupling part of the body case. The body case is electrically connected to the external power source through the plug, A temperature control unit built in the body case for controlling power supply of the heating wire and adjusting a heating temperature; a water temperature sensor for outputting a signal for controlling the operation of the heating wire to the temperature control unit; A water temperature sensing tube having an upper end inserted into a coupling portion of the main body case and a lower end formed at a position higher than a lower end of the heating tube, And a second terminal piece for electrically connecting the upper end of the water temperature sensing tube to the temperature control section, Wherein the temperature control unit controls the supply of power to the heating element by sensing the level of the object to be heated contained in the container depending on whether current flows through the heating object between the heating tube and the water temperature sensing tube. A movable type submerged heater.

Description

[0001] The present invention relates to a portable water heater having a water level detection function,

The present invention relates to a moving type submerged heater, and more particularly, to a moving type submerged heater having a level detecting function capable of quickly and accurately detecting the level of a heating object such as water contained in a container or the like.

The movable type water heater is used to easily heat a heating object such as a large amount of water or liquid chemicals or an aqueous solution contained in a bucket such as a basin or a container or a water tank to a predetermined temperature and has a high thermal efficiency and does not cause pollution Is widely used for industrial and agricultural purposes.

Such a movable type submerged heater is generally provided with a so-called water level sensor for automatically shutting off the power when the object to be heated contained in the container reaches a certain level in order to prevent fire during use.

However, due to the nature of the underwater heater, most of the water level sensor is built in a separate pipe, so that it is difficult and troublesome to inspect and maintain when it is broken or malfunction, There is a structural limit to fall.

Korean Utility Model Registration No. 20-0441512 (2008.08.21) Korean Patent Registration No. 10-0967690 (Jul. 7, 2010) Korea Registered Utility Model Bulletin No. 0119560 (March 16, 1996) Korean Utility Model Registration No. 20-0237611 (Oct. 11, 2001) Korean Patent Publication No. 2003-0035721 (2003.05.09) Korean Utility Model Publication No. 20-2008-0000909 (2008.05.08) Korean Registered Utility Model No. 20-0313236 (2003.05.17) Japanese Patent Application Laid-Open No. 2009-272230 (2009.11.19)

Accordingly, the inventor of the present invention has focused on solving the above-mentioned problems and solving the problems, so that the structure is simple, but the safety level of preventing fire due to overheating is improved by sensing the level of the object to be heated in the container quickly and accurately, He made an effort to develop the heater and invented this design while completing research.

Accordingly, the technical problem and object of the present invention is to provide a mobile type submerged heater having a water level detection function for quickly and accurately detecting the water level of a heating object.

According to an aspect of the present invention, there is provided a portable terminal comprising: a main body case having a coupling portion formed on one side of a lower surface thereof; A temperature controller for controlling the supply of power to the heating wire and adjusting the temperature of the heating wire, the heating wire being installed in the main body case, A water temperature sensing tube having a water temperature sensor for outputting a signal for controlling operation of the heating wire to the control unit, an upper end inserted into the coupling part of the main body case and a lower end formed at a higher position than the lower end of the heating pipe, A first terminal piece for electrically connecting an upper end of the heating tube to the temperature control section, And a second terminal piece for electrically connecting the upper end and the temperature control part. The temperature control part senses the level of the object to be heated contained in the container depending on whether a current flows through the object to be heated between the heating tube and the water- And the power is supplied to or disconnected from the heating wire.

As a result, the present invention can detect the level of the object to be heated quickly and accurately, thereby effectively preventing fire during use.

In an embodiment of the present invention, the first terminal piece is connected to the heating tube and the temperature control part while being fixed to the main body case, and the second terminal piece is fixed to the main body case, And is connected to the branch pipe and the temperature control unit.

The present invention, which has the means and construction for solving the above technical problems, forms and arranges the heating tube and the water temperature sensing tube so that their contact positions with respect to the heating object are different from each other, The object to be heated can be detected quickly and accurately according to the presence or absence of the flow of electric current by wiring and wiring so that the electric current flows or is interrupted in the temperature control unit according to the predetermined water level of the object to be heated. It is possible to perform the opening / closing control for supplying or blocking the electric power to the heating wire, thereby making it possible to more effectively prevent the safety accident such as fire due to the low water level.

1 is a perspective view showing a movable type submerged heater according to an embodiment of the present invention.
2 is a side view showing a movable type submerged heater according to an embodiment of the present invention.
3 is a side cross-sectional view schematically showing a local part of the movable type water heater according to the embodiment of the present invention.
Fig. 4 is a plan sectional view showing a movable part of the movable water heater according to the embodiment of the present invention. Fig.

Hereinafter, embodiments according to the present invention will be described more specifically with reference to the accompanying drawings.

Prior to this, the following terms are defined in consideration of the function of the present invention, and it is to be interpreted as a concept conforming to the technical idea of the present invention and interpreted in a way that is commonly or commonly recognized in the technical field.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

1 to 3, the movable type submerged heater according to the embodiment of the present invention mainly includes a main body case 10, a heating pipe 20, a temperature control unit 30, a water temperature sensing pipe 40, And includes a terminal piece (50) and a second terminal piece (60).

The main body case 10 houses and protects the temperature control unit 30 in a state where the plug P and the power cord W are electrically connected to each other through a plug P for external power supply. An engaging portion 11 for inserting and passing both ends and the upper end of the water-sensing tube 40 is integrally protruded.

Here, the upper surface of the main body case 10 may be provided with a power lamp (not shown) for indicating that power is supplied to the heating wire 22 and is operating, and the external power supplied through the plug P may be directly It is needless to say that a power switch (not shown) for opening and closing may be provided.

The heating pipe 20 is formed by bending a metal pipe having a predetermined diameter and a length so that both ends thereof are parallel to each other at a predetermined interval, and either end of the heating pipe 20 is connected to a plug P, To prevent the occurrence of electric shock due to a short circuit, it may be grounded through a separate ground line from a plug P for connection with an external power source.

Both ends of the heating pipe 20 parallel to each other are inserted and fixed to the main body case 10 through the coupling portion 11 formed on the lower surface of the main body case 10 and the bending portion is electrically connected to the external power supply A heat conductive line 22 for converting the electric energy into heat energy by electric resistance when the power is applied is built in and a thermally conductive filler 27 in the form of powder is densely filled in the space between the hollow portion and the electric heating line 22, ).

Here, the heating tube 20 may be formed of a metal material such as titanium, tantalum, zirconium, or stainless steel that is light in weight and excellent in corrosion resistance, chemical resistance, and thermal conductivity, and its middle portion is U- And a helical shape, and the heating wire 22 may be formed of any one of various heating elements such as a nichrome wire, a carbon heating element, a ceramic heating element, and a tungsten wire.

As the filler 27, magnesium oxide (MgO), which has excellent thermal conductivity and insulation, is used to insulate the heating tube 20 from the heating wire 22 so that the thermal efficiency 22 resulting from conversion of the electrical energy of the heating wire 22 into thermal energy And it is possible to maintain a stable state without deformation even with external physical impact.

In order to prevent an electric shock such as electric shock, the plug P preferably employs a so-called grounding plug (a ground terminal and a connection terminal integrated type) which maintains the potential at zero.

The temperature control unit 30 is incorporated in the main body case 10 to control the heating temperature of the heating wire 22 to a user's desired temperature and to control the opening and closing of the power source, and a temperature control knob 35 are electrically connected to the temperature control unit 30 while being exposed on the upper surface of the main body case 10.

That is, the temperature control unit 30 is electrically connected to the plug P and the power cord W for supplying power in a state of being housed in the main body case 10, and is electrically connected to the heating wire 22, the temperature control knob 35 ), A water temperature sensor 42, and a power switch (not shown).

Accordingly, when the temperature is set to a reference value that meets the safety criterion by operating the temperature control knob 35, the temperature controller 30 compares the temperature sensed by the water temperature sensor 42 with the preset temperature so that the sensed temperature is lower than the set temperature The power is applied to the heating wire 22, and when the temperature is higher than the set temperature, the power supplied to the heating wire 22 is cut off.

Here, the temperature controller 30 always supplies a current of about 5 V to either the first terminal piece 50 or the second terminal piece 60.

The water sensing tube 40 has a metal tubular shape having a predetermined diameter and a length and its upper end in the longitudinal direction is inserted and fixed into the main body case 10 through a coupling portion 11 formed on a lower surface of the main body case 10 And a water temperature sensor 42 for sensing the external heat and outputting a signal for controlling the operation of the heating wire 22 to the temperature control unit 30 is installed in the lower part while being electrically connected to the temperature control unit 30. [

The lower end of the water temperature sensing tube (40) is formed and arranged so as to be positioned higher than the lower end of the heating tube (20).

The upper end portion of the water warming sensing tube 40 inserted into the main body case 10 safely guides the current leaking from the conductor 21 and the heating wire 22 to the ground through the plug P, It can be grounded via a separate ground line from a plug (P) for connection with an external power source to prevent a safety accident.

The first terminal piece 50 is disposed so as to be connected to the heating pipe 20 and the temperature control unit 30 so as to electrically connect the upper end of the heating pipe 20 and the temperature control unit 30. [

4, the first terminal piece 50 is in contact with the top surface of the heating tube 20 so as not to cause contact interference with the conductor 21 embedded in the heating tube 20 It is preferably formed in a curved or arcuate shape.

The second terminal piece 60 is disposed so as to be connected to the water temperature sensing tube 40 and the temperature control unit 30 in order to electrically connect the upper end of the water temperature sensing tube 40 and the temperature control unit 30. [

It is preferable that the second terminal piece 60 is formed so as not to cause contact interference with the water temperature sensor 42 built in the water temperature sensing tube 40, like the first terminal piece 50.

The first terminal piece 50 and the second terminal piece 60 are formed of an electrically conductive material and fixed to the main body case 10 with screws or the like, respectively, so that a more simple and stable connection state can be maintained.

In the movable type submerged heater according to the embodiment of the present invention, the water level of the object to be heated contained in the container is kept within a predetermined range due to the difference in height between the heating tube 20 and the water- For example, when the water level of the container is lower than the lower end of the water sensing tube 40, the heating object (water), which is an intermediary for transferring electric current between the heating tube 20 and the water sensing tube 40, The current always supplied from the temperature control unit 30 flows only to the heating pipe 20 through the first terminal piece 50 and is not transmitted to the water temperature sensing pipe 40. [
The current does not flow to the temperature control unit 30 through the water temperature sensing tube 40 and the second terminal unit 60 so that the temperature control unit 30 quickly and accurately detects the low temperature state and supplies power to the heating wire 22 The heating function of the heating wire 22 is automatically stopped, so that a fire or a safety accident due to overheating can be prevented.

That is, the temperature control unit 30 senses the level of the object to be heated contained in the container, and supplies power to the heating wire 22 depending on whether a current flows through the object to be heated between the heating tube 20 and the water temperature sensing tube 40 It is possible to maximize the safety to prevent a fire accident due to the low water level by keeping the detection state more quickly, accurately and in good condition.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments and the accompanying drawings, and various changes and modifications may be made without departing from the scope of the invention. It will be apparent to those skilled in the art that modifications may be made to the embodiments.

Therefore, the contents related to the modification and application of the feature of the present invention should be interpreted as being included within the scope of the present invention.

10: main body case 11:
20: heating tube 21: conductor
22: heating wire 30: temperature control unit
40: water temperature sensor 42: water temperature sensor
50: first terminal piece 60: second terminal piece

Claims (2)

(10) having a coupling part (11) at one side thereof;
Both ends of which are formed by bending so as to be parallel to each other are inserted into the engaging portion 11 of the main body case and are electrically connected to the external power source through the plug 12, the power cord 13 and the conductor 21, A heating pipe 20 in which a heating wire 22 is embedded;
A temperature controller 30 built in the main body case 10 to control power supply to the heating wire 22 and adjust a heating temperature;
A water temperature sensor 42 for outputting a signal for controlling the operation of the heating wire 22 is installed in the temperature control unit 30 and an upper end of the water temperature sensor is inserted into the coupling unit 11 of the main body case 10, A water-sensing tube (40) formed at a position higher than the lower end of the heating tube (20);
The temperature controller 30 senses the level of the object to be heated contained in the container according to whether a current flows through the object to be heated between the heating tube 20 and the water temperature sensing tube 40, (50) for electrically connecting the upper end of the heating pipe (20) to the temperature control unit (30) and supplying the current supplied from the temperature control unit (30) to the heating pipe ); A second terminal piece 60 electrically connecting the upper end of the water temperature sensing tube 40 and the temperature control part 30 to transmit a current flowing in the water-sensing tube 40 to the temperature control part 30;
And a heater for heating the movable heater. delete

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