KR101609986B1 - Non-motorized water mat boiler improving compulsory circular and ceiling function - Google Patents

Abstract

The present invention relates to a non-motorized water mat boiler with enhanced hot water circulation and sealing performance. A water tank, which has an inlet and an outlet formed on a side of the body with a storage space filled with circulation water to draw the circulation water in the storage space in and out, has a circulation heating means fixed thereto with an extended bolt, thereby heating the circulation water to circulate the circulation water in heating pipes. According to the present invention, the non-motorized water mat boiler uses the extended boiler to easily fix and integrate the circulation heating means, which heats the circulation water as well as guiding and circulating the circulation water to the heating pipes, onto the water tank and maintain a reliable coupling therebetween in order to prevent leaks in the joint area.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boiler for a hot water mat which improves circulation and sealing performance of a non-

The present invention relates to a boiler apparatus for a hot water mat which improves the non-powered hot water circulation and sealing performance, and more particularly to a boiler apparatus for heating a circulating water by firmly fixing the circulating water heating means to a water tank, The present invention relates to a boiler for a hot water mat which improves the thermal efficiency during heating of the heater body and improves the circulation of the hot water and the sealing performance, will be.

Generally, in Korea, hot water mats using living mats or floors and electric mats or hot water boilers are used for effective heating in winter.

However, the demand for electric mats is lowered due to the generation of harmful electromagnetic waves due to the use of electric heating wires.

Such a conventional hot water boiler for a hot water mat has been proposed in Patent No. 10-0970905 and Japanese Patent Laid-Open No. 10-2008-0111913. However, such conventional hot water boilers have a structure in which hot water is circulated by using a pump, which causes noise and disturbs lifetime.

Recently, a boiler for a hot water mat having a non-powered hot water circulating function without a pump has been studied. For example, Korean Patent Laid-Open No. 10-2014-0072357 has been proposed. A water tank in which a water inlet is formed at an upper side and a water outlet is formed at a lower side; A heating unit installed in communication with the water outlet of the water tank and heating the water supplied from the water tank; A water passage communicating with a water outlet of the water tank is formed in the water tank, and a valve seat is formed at a periphery of a water outlet of the water tank, and the other end is communicated with the heating unit. And a valve disc provided inside the coupling portion and being moved by a pressure difference between the hot water and the cold water to close the water discharge port while the front edge portion is seated on the valve seat. And the other end is connected to the water tank so that the hot water heated by the heating unit flows into the water tank through the structure or article requiring the heating Circulation pipe; Wherein a plurality of counterflow grooves spaced apart in the circumferential direction are formed on the valve seat of the water discharge port which is in contact with the flow passage, extending along the inner surface of the water discharge port, Wherein the valve disc is made of an elastic material so that when a pressure greater than a predetermined value is applied to the central portion of the valve disc due to the air overheated in the heating portion, The front edge of the valve disc is spaced apart from the periphery of the water outlet of the water tank so that the backflow groove communicates with the flow path.

However, since the heating unit has a body coupled to the water outlet of the water tank and the heating unit is coupled to the body, the heating unit is difficult to be firmly coupled, and the risk of leakage of the connection or joint is large.

Further, since the heating unit is integrally insert-molded into the heater body, the heater body is made of a plastic material, the heat transfer efficiency is low when heating the heater body, and the heat is vulnerable to heat, so there is a high risk of deformation.

In addition, a disk-shaped valve disk is provided to open and close the water outlet to prevent the backflow of the hot water. It is difficult to completely close the backflow groove unless the valve disk moves by pressure and is correctly seated on the valve seat.

Accordingly, it is an object of the present invention to provide a circulating water heating device for heating a circulating water, which can firmly fix a circulating water heating means to a water tank to prevent leakage of a joint, And to provide a boiler apparatus for a hot water mat which improves the non-powered hot water circulation and sealing performance.

It is another object of the present invention to provide a boiler apparatus for a hot water mat which improves the non-powered hot water circulation and sealing performance, which is installed in a water tank to prevent reverse flow of circulating water, have.

In order to solve such a technical problem,

A water tank in which an outflow path and an inflow port through which the circulating water flows in and out of the accommodation space are formed at one side of a body in which the accommodation space filled with the circulation water is formed and a water tank connected between the outflow path of the water tank and one end of the heating pipe A circulation water heating means connected to the inlet port and connected to the other end of the heating pipe to guide the circulation water of the heating pipe to the accommodation space; 1. A boiler for a hot water mat having improved non-dynamic hot water circulation and sealing performance comprising an inlet pipe, the outlet passage being equipped with a first finishing aperture; Wherein the circulating water heating means includes a plurality of bolt support grooves through which long bolts pass through in the longitudinal and longitudinal direction of the body and a plurality of heater support grooves on which the heater modules are mounted, And a second finishing hole formed at the front end of the first finishing hole to closely contact the rear end of the first finishing hole and having a front end of the heating tubular body and an outlet portion through which the circulating water heated through the flow passage flows out; Wherein a through hole corresponding to the bolt support groove of the heating pipe body is formed on a surface of the first and second finishes, the long bolt penetrates through the second finishing hole, the heating pipe body and the first finishing hole, The present invention provides a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance.

At this time, the outflow passage is formed horizontally, and a through hole communicating with the accommodation space is formed at a rear end, and the outflow passage is provided with a reverse flow passage for opening and closing the through hole.

Particularly, the backflow prevention hole has a concave groove portion formed at a front end of a cylindrical body, and a dome-shaped protruding portion capable of opening and closing the through hole is formed at a rear end of the body.

A first waterproof ring is mounted between the rear surface of the first finishing sphere and the front end of the outflow path, a second waterproof ring is mounted between the first finishing hole and the rear end of the heating pipe, And a third leak-preventive ring is mounted between the second end portion and the second end portion.

The other end of the inflow pipe connected to one end of the inflow port of the water tank is connected to a rear end of the inflow unit. .

In addition, the heating pipe body is made of aluminum or copper material having a good thermal conductivity, and has a rectangular cross-section, and a flow path for circulating water in the longitudinal direction is formed at the center, and a long bolt A plurality of bolt support grooves are formed in the body and a heater support groove is formed on the left and right outer surfaces of the body so that the heater module is mounted on the body. .

The present invention also provides

A water tank in which an outflow path and an inflow port through which the circulating water flows in and out of the accommodation space are formed at one side of a body in which the accommodation space filled with the circulation water is formed and a water tank connected between the outflow path of the water tank and one end of the heating pipe A circulation water heating means connected to the inlet port and connected to the other end of the heating pipe to guide the circulation water of the heating pipe to the accommodation space; 1. A boiler for a hot water mat having improved non-powered hot water circulation and sealing performance comprising an inlet pipe, comprising: The circulating water heating means includes at least one heater holding groove in which a plurality of bolt supporting grooves and a heater module are mounted in the longitudinal direction of the body, on the outer surface of a body through which a flow path for circulating water flows in the center, And a second finishing means for finishing a front end of the heating pipe and having an outlet portion through which the circulating water heated through the channel flows out, the second finishing means being protruded from the first finishing hole; Wherein a fastening hole corresponding to the bolt support groove of the heating pipe body is formed on the surface of the first and second finishing holes so as to penetrate and fasten the first and second screw threads; And a fixing bolt is fastened to the water tank by forming a coupling hole corresponding to the support hole along an edge of an outflow path formed at a front end of the body of the water tank, And a boiler for a hot water mat having improved sealing performance.

The boiler apparatus for a hot water mat having improved non-powered hot water circulation and sealing performance according to the present invention is characterized in that a circulating water heating means for heating circulating water to a water tank and guided to circulate through the heating pipe is integrally fixed with a bolt, So that it is advantageous to prevent water leakage at the joint part.

In addition, it is possible to improve the backflow prevention effect by improving the structure of the backflow prevention zone which is provided in the outflow passage formed in the water tank to prevent the reverse flow of the circulating water, and the hitting pipe body is made of aluminum or copper material excellent in thermal conductivity, A heater module is provided to rapidly heat the circulating water, and the heater module and the temperature sensor can be easily mounted, thereby making it possible to easily manufacture the boiler device for the hot water mat as a whole, thereby improving the productivity.

1 is a perspective view illustrating a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention.
2 is an exploded perspective view of a boiler for a hot water mat with improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention.
3 is a side cross-sectional view of a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention.
4 is a front view of a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention.
5A is a view for explaining a normal circulation state of hot water in a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention.
FIG. 5B is a view for explaining a state of preventing the backflow of hot water in a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention.
6 is a perspective view illustrating a boiler for a hot water mat with improved non-powered hot water circulation and sealing performance according to another embodiment of the present invention.
7 is an exploded perspective view of a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to another embodiment of the present invention.
8 is a side cross-sectional view of a boiler for a hot water mat with improved non-powered hot water circulation and sealing performance according to another embodiment of the present invention.
9 is a front view of a boiler for a hot water mat with improved non-powered hot water circulation and sealing performance according to another embodiment of the present invention.
10 is a cross-sectional view illustrating an assembled state of a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in which a boiler for a hot water mat having improved non-powered hot water circulation and sealing performance is described.

While the present invention has been described in connection with certain exemplary embodiments, it is obvious to those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

1 to 5B, a boiler apparatus 100 for a hot water mat having improved non-powered hot water circulation and sealing performance according to an embodiment of the present invention includes a mat (1) in which a heating pipe (10) The outflow passage 113 and the inlet 114 through which the circulating water flows out and flow into one side of the body 111 where the accommodation space 112 filled with the circulating water W is formed, A water tank 110 formed in the water tank 110 and an outflow passage 113 of the water tank 110 and one end of the heating pipe 10 to heat the circulating water in the accommodation space 112, The circulation water heating means 120 is connected to the circulation water heating means 120 to be circulated to the heating pipe 10 and the circulation water heating means 120 connected between the inlet 114 of the water tank 110 and the other end of the heating pipe 10, And an inflow pipe (130) for guiding air to the accommodation space (112).

Hereinafter, the constitution of each part of the present invention will be described in detail.

The water tank 110 is formed with an outflow passage 113 and an inlet 114 through which the circulating water flows out and flows in front of the body 111 where the accommodation space 112 in which the circulation water is filled is formed.

The water tank 110 is integrally provided with a lid 115 having an opened upper part of the body 111. The water tank 110 has a circulation water inlet 115a are formed. At this time, an O-ring 117 for preventing water leakage is provided on the rim of the lid 115 to prevent the circulating water charged in the receiving space 112 of the body 111 from leaking when the lid 115 is fastened to the body 111 do.

Of course, the lid 115 and the body 111 are integrally coupled using a screw 116. For this purpose, the lid 115 and the body 111 are coupled to each other at the upper edge of the body 111 with screw holes 115b and 111a .

A water level sensor 140 for detecting the water level of the circulating water in the water tank 110 is provided to sense whether the circulating water is insufficient or overflowed by detecting the water level, and accordingly, a control panel (not shown) So that the user can recognize the warning data. In this case, the water level sensor 140 is formed with a fastening protrusion 141 protruding from the upper end thereof and is exposed through the fixing hole 115c of the lid 115 and is integrally fixed using screws 142.

Of course, the warning data can be output by LED blinking or a warning sound of the buzzer or the like, which is a well-known configuration, and thus a detailed description thereof will be omitted.

A through hole 119 through which the circulating water flows in the receiving space 112 is formed in the body 111 and an outflow passage 113 whose inner diameter is relatively expanded as compared with the through hole 119 is formed horizontally . That is, the outflow passage 113 is horizontally formed and formed to be stepped with the through hole 119.

The outflow channel 113 is provided with a counter flow chamber 150 that horizontally moves along the outflow channel 113 and opens and closes the through hole 119.

At this time, the backflow chamber 150 has a recessed groove 152 formed at the front end of the cylindrical body 151 and a dome-shaped protrusion 153 formed at the rear end of the body 151, When the earth 150 is retracted, the through hole 119 of the body 111 is closed to prevent the circulating water in the accommodation space 112 from flowing out to the outflow path 113.

Particularly, the backflow chamber 150 has a concave groove 152 formed at the front end of the cylindrical body 151, so that when the circulation water is heated by the circulation water heating means 120, So that the dome-shaped protrusion 153 is closed by the through hole 119 to prevent the circulating water from flowing backward into the receiving space 112 of the water tank 110.

At this time, the backflow chamber 150 may be made of plastic or rubber. Particularly, the protruding portion 153 of the backflow prevention chamber 150 is fitted with the urging member 119a along the edge of the through hole 119 in order to minimize leakage when the through hole 119 is closed.

On the other hand, circulation water heating means 120 for heating the circulation water flowing out from the accommodation space 112 is provided at the other end of the outflow path 113. In this case, a plate-shaped first finishing hole 160 is installed in the outflow passage 113, and in order to prevent the circulation water from leaking through the edge of the outflow passage 113, A first leakage preventing ring 162 is mounted between the front ends of the outflow paths 113.

The circulation water heating means 120 is integrally mounted on the front surface of the first finishing 160. The circulating water heating means 120 includes a body 122a through which a flow path 122d through which a circulating water flows, a plurality of bolt support grooves 122a through which the elongated bolts 170 can pass, A heating pipe 122 in which a plurality of heater supporting grooves 122c to which the heater module 122 and the heater module 172 can be mounted is formed and a front end of the heating pipe 122 is heated and heated through the oil passage 122d And a second finishing opening 124 in which the outflow portion 124a through which the circulating water flows out is protruded.

A second waterproofing ring 165 is installed between the first finishing hole 160 and the rear end of the heating pipe 122. The second waterproofing ring 165 is installed between the front end of the heating pipe 122 and the second finishing hole 124 A third waterproof ring 125 is mounted to prevent the circulation water at the front and rear ends of the heating tube 122 from leaking.

Through holes 160a and 124b are formed on the surfaces of the first and second finishing openings 160 and 124 corresponding to the bolt support grooves 122b of the heating tube 122 and the body 111 of the water tank 110 A plurality of coupling grooves 111b are formed at the front end thereof, and the long bolt 170 is engaged. That is, the long bolt 170 is inserted into the through hole 124b of the second finishing hole 124, the bolt support groove 122b of the heating tube 122, and the through hole (not shown) of the first finishing hole 160 The hitting tube 122 and the first and second closing tools 160 and 124 are firmly fixed to the water tank 110 by being coupled to the coupling groove 111b of the water tank 110 through the through holes 160a and 160a. Therefore, assembly of the heating tube 122 and the first and second finishing openings 160 and 124 is also simple.

One end of the heating pipe 10 is connected to the outlet 124a formed in the second finishing hole 124 and the circulating water filled in the receiving space 112 of the water tank 110 is connected to the heating pipe 122, The heat is circulated to the heating pipe 10 of the mat 1. [

The inflow part 124c is integrally formed at one side of the outflow part 124a of the second finishing opening 124 and the other end of the heating pipe 10 is connected to recover the circulating water that has been heated. At this time, the other end of the inflow pipe 130, one end of which is connected to the inflow port 114 of the water tank 110, is connected to the rear end of the inflow portion 124c. At this time, since the inlet 114 of the water tank 110 and the inlet 124c of the second finishing hole 124 maintain a predetermined distance, both ends of the inlet pipe 130 can be connected by press fitting. Of course, the inflow pipe 130 may be made of plastic or a metal material, and the inflow port 114 of the water tank 110 and the inflow portion 124c of the second finishing port 124 may be connected to each other, Lt; / RTI >

The body 122a may be made of aluminum or copper having a high thermal conductivity. The body 122a may have a rectangular cross-section, a channel 122d may be formed at the center thereof in the longitudinal direction, A plurality of bolt support grooves 122b through which the elongated bolts 170 can penetrate in the longitudinal direction along the corners are formed and heater support grooves 122c are formed on the left and right outer surfaces so that the plate heater module 172 Respectively. That is, the heating tube 122 includes a heater module 172 on the left and right outer surfaces of the body 122a to rapidly heat the circulating water as the circulating water is heated, and the heater module 172 Can be easily installed in the heater support groove 122c, thus simplifying the installation work.

The heating tube 122 is provided with a temperature sensor 174 on the upper or lower outer surface of the body 122a to measure the temperature when the circulating water is heated by driving the heater module 172, The heater module 172 is cut off from the control panel in order to prevent overheating or fire of the circulating water. To this end, the heating tube 122 may further include a sensor support groove 122e formed on the upper or lower outer surface of the body 122a to easily mount the temperature sensor 174 thereto.

Hereinafter, a driving example of a boiler for a hot water mat with improved non-powered hot water circulation and sealing performance according to the present invention will be described with reference to FIGS. 1 to 5B.

First, when the user turns on the control panel to use the hot water mat, the detection signals of the water level sensor 140 and the temperature sensor 174 are inputted and the current state is checked.

Then, when the user sets the temperature by operating the control panel, power is supplied to the heater module 172 to heat the circulating water staying in the flow path 122d of the heating tube 122.

At this time, the pressure rises due to the temperature rise of the circulating water heated by the heater module 172, so that the backflow prevention part 150 is instantaneously retreated to close the through hole 119 of the water tank body 111, Thereby preventing the circulating water from flowing back into the circulation pipe 112.

Thereafter, the heated circulation water moves along the heating pipe 10, the counterflow chamber 150 advances, the through hole 119 of the water tank 110 is opened, and the circulating water charged in the accommodation space 112 is discharged to the heating pipe 122, and is heated to move along the heating pipe 10 to perform heating.

The circulating water traveling along the heating pipe 10 is collected into the receiving space 112 of the water tank 110 through the inlet pipe 130 connected to the other end of the heating pipe 10.

The circulated water thus recovered is circulated and heated to perform heating, and then passes through the oil passage 122d of the heating tube 122 to be heated and circulated. In this case, the temperature sensor 174 continuously measures the temperature of the circulating water, and the control panel compares the measured temperature with the set temperature. If the temperature exceeds the set temperature, the controller 172 stops driving the heater module 172 do. Of course, it is also possible to control the heater module 172 to drive the heater module 172 when the temperature reaches the set temperature and the heater module is stopped for a predetermined period of time or under the allowable minimum temperature. And the heating function can be set.

6 to 10 are views showing a boiler apparatus 100 for a hot water mat having improved non-powered hot water circulation and sealing performance according to another embodiment of the present invention. The water tank 110 and the circulating water heating means 120).

The first end stop 160 is mounted on the outflow path 113 of the water tank 110 and the rear end of the heating tubular body 122 is fixed to the front surface of the first end stop 160, A second finishing hole 124 is fixed to the front end of the heating pipe 122.

In this case, fastening holes 161 and 124d are formed on the surfaces of the first and second finishing holes 160 and 124 corresponding to the bolt support grooves 122b of the heating tube 122 to form the first and second screw threads 163, 124e are fastened.

More specifically, the first end stop 160 is brought into close contact with the rear end of the heating tube 122, and the first screw 163 is screwed into the fastening hole 161 of the first end stop 160, And the second finishing hole 124 is brought into close contact with the front end of the heating pipe 122. The second finishing hole 124 is in close contact with the second end of the heating pipe 122, The screw thread 124e passes through the fastening hole 124d of the second finishing hole 124 and then is screwed into the bolt support groove 122b at the front end of the hitting tube 122 to be engaged with the heating tube 122 ) Before the end of the last.

A second waterproofing ring 165 is installed between the first finishing hole 160 and the rear end of the heating pipe 122. The second waterproofing ring 165 is installed between the front end of the heating pipe 122 and the second finishing hole 124 The third waterproof ring 125 is installed to prevent the circulating water from leaking from the front and rear ends of the heating tube 122.

In order to integrally fix the heating tube 122 closed with the first and second finishing openings 160 and 124 to the water tank 110 as described above, And an engagement hole 111c corresponding to the support hole 169 is formed along the edge of the outflow path 113 formed at the front end of the body 111 of the water tank 110, (167).

That is, the fixing bolt 167 is passed through the support hole 169 in the state where the rear surface of the first finishing hole 160 is in close contact with the front end of the body 111 of the water tank 110, And fix it integrally.

Therefore, the heating tube 122 and the first and second finishing openings 160 and 124 are integrally assembled to the front end of the body 111 of the water tank 110 and can be easily fixed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary,

1: Mat 10: Heating piping
100: boiler device 110: water tank
113: Outflow path 114: Inlet port
120: circulation water heating means 122: heating tube
124: second dead center 130: inlet pipe
150: Reverse flow region 160: 1st deadline
170: long bolt 172: heater module
174: Temperature sensor

Claims (7)

An outlet passage 113 through which the circulating water flows in and out of the accommodation space 112 and a water inlet 114 through which the inlet 114 is formed are formed at one side of the body 111 where the accommodation space 112 filled with the circulating water W is formed, The circulation water in the receiving space 112 is connected between the tank 110 and the outflow path 113 of the water tank 110 and one end of the heating pipe 10 to heat the circulation water to the heating pipe 10 Circulating water heating means 120 guided to be circulated and connected between the inlet 114 and the other end of the heating pipe 10 to circulate the circulating water of the heating pipe 10 into the accommodation space 112 And a guiding inflow pipe (130), wherein the non-powered hot water circulation and the sealing performance are improved,
A first finishing hole 160 is mounted on the outflow path 113;
The circulating water heating means 120 includes a body 122a through which a flow path 122d through which a circulating water flows, a plurality of bolt support grooves 122a through which the elongated bolts 170 are passed in the longitudinal direction of the body, A heating tube 122 having one or more heater supporting grooves 122c to which the heater module 122 and the heater module 172 are mounted and having a rear end close to the front surface of the first finishing unit 160, And a second finishing opening 124 through which an outlet 124a through which the circulating water heated through the passage 122d flows out is formed;
Through holes 160a and 124b corresponding to the bolt support grooves 122b of the heating tube 122 are formed on the surfaces of the first and second finishing holes 160 and 124, And is coupled to the plurality of coupling grooves 111b formed at the front end of the body 111 of the water tank 110 through the second finishing hole 124, the heating pipe 122, and the first finishing hole 160 Wherein the hot water circulation and the sealing performance are improved.
The method according to claim 1,
The outflow passage 113 is formed horizontally and a through hole 119 communicating with the accommodation space 112 is formed at a rear end of the outflow passage 113. The outflow passage 113 is provided with a through- (150) is provided on the upper surface of the main body (110).
3. The method of claim 2,
The backflow prevention part 150 has a concave groove 152 formed at the front end of the cylindrical body 151 and a dome shaped protrusion 153 formed at the rear end of the body 151 for opening and closing the through hole 119 Wherein the hot water circulation and the sealing performance are improved.
The method according to claim 1,
A first leakage preventing ring 162 is mounted between the rear surface of the first finishing hole 160 and the front end of the outflow path 113 and between the first finishing hole 160 and the rear end of the heating pipe 122 And a third waterproof ring 125 is mounted between the front end of the heating tube 122 and the second finishing opening 124. [ And a boiler for hot water mat with improved sealing performance.
The method according to claim 1,
An inlet 124c is integrally formed at one side of the outlet 124a of the second finishing opening 124 to connect the other end of the heating pipe 10,
And the other end of the inflow pipe 130 connected to the inflow port 114 of the water tank 110 is connected to the inflow end of the inflow pipe 124c. Boiler equipment for hot water mats.
The method according to claim 1,
The body 122a of the heating body 122 is made of aluminum or copper having a high thermal conductivity, and has a rectangular cross section. A channel 122d is formed at the center to move circulation water in the longitudinal direction. A plurality of bolt support grooves 122b through which the elongated bolts 170 can penetrate in the longitudinal direction and heater support grooves 122c on which the heater modules 172 are mounted are formed on the left and right outer surfaces of the body 122a And a sensor support groove (122e) for fixing the temperature sensor (174) is formed on the upper or lower outer surface of the body (122a).
An outlet passage 113 through which the circulating water flows in and out of the accommodation space 112 and a water inlet 114 through which the inlet 114 is formed are formed at one side of the body 111 where the accommodation space 112 filled with the circulating water W is formed, The circulation water in the receiving space 112 is connected between the tank 110 and the outflow path 113 of the water tank 110 and one end of the heating pipe 10 to heat the circulation water to the heating pipe 10 Circulating water heating means 120 guided to be circulated and connected between the inlet 114 and the other end of the heating pipe 10 to circulate the circulating water of the heating pipe 10 into the accommodation space 112 And a guiding inflow pipe (130), wherein the non-powered hot water circulation and the sealing performance are improved,
The circulating water heating means 120 has a plurality of bolt support grooves 122b and a plurality of heater modules 172 in the longitudinal direction of the body on the outer surface of a body 122a through which a flow path 122d through which a circulating water flows, A heating tube 122 having a rear end attached to a front surface of a first finishing hole 160 to which the at least one heater supporting groove 122c is mounted and mounted to the outflow path 113; And a second finishing opening 124 through which an outlet 124a through which the circulating water heated through the passage 122d flows out is formed;
Fastening holes 161 and 124d corresponding to the bolt supporting grooves 122b of the heating tube 122 are formed on the surfaces of the first and second finishing holes 160 and 124 so that the first and second screw threads 163, 124e) are inserted and fastened;
A support hole 169 is further formed on the surface of the first finishing hole 160 and the support hole 169 is formed along the edge of the outflow path 113 formed at the front end of the body 111 of the water tank 110. [ And a fastening bolt (167) is fastened to the fastening bolt (167).

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