KR101800711B1 - Apparatus for promoting hot-water circulator without power - Google Patents

Abstract

The present invention relates to a non-powered hot water circulation promoting apparatus for enhancing the efficiency of heating by smoothly circulating hot water by a non-dynamic force in a situation where a hot water mat and a boiler are placed on the same ground as a non-powered heating boiler used for outdoor camping A hot water transfer water reservoir in which water is contained to form a water surface, and a nose inlet and a hot water discharge hole are formed on the bottom surface; Directional switching elbow for switching the direction of movement of the rising nose discharged from the boiler to a horizontal direction and a part of the nose discharged from the nose-direction switching elbow connected to the nose-direction switching elbow and the nose- Bubbles included in the water discharged from the right side connection port of the first nursery branch point tee, which is connected to the first nursery branch tee and the hot water descending port, flows into the hot water relay tank And a second radiant water pipe for discharging the hot water contained in the radewater discharged from the right connection port of the first nadir branching tee to the heating pipe together with the hot water discharged from the hot water relay tank do.

Description

[0001] APPARATUS FOR PROMOTING HOT-WATER CIRCULATOR WITHOUT POWER [0002]

The present invention relates to a non-powered hot water circulation promoting device, and more particularly, to a non-powered heating boiler for outdoor camping, in which a hot water mat and a boiler are placed on the same surface, And to a non-powered hot water circulation promoting device for raising the temperature.

1 is a view showing a hot water circulation structure of a conventional non-powered hot water heating briquetting boiler. 1, the bubbles discharged from the hot water outlet 11 of the boiler 10 and the hot water (hereinafter referred to as 'base water') are connected to the first connection pipe L1 And flows into the water distribution pipe 20 through the pipe (not shown). The radii introduced into the water distribution pipe 20 pass through the radial direction switching elbow 21 and receive the horizontal thrusting force and move to the radial tie point tee 22 and the hot water descending elbow 23. In this process, The bubbles rise along the second connection pipe (L2) and flow into the makeup water reservoir (30). The hot water moved to the hot water descending elbow 23 is supplied to the heating pipe 40 through the third connecting pipe L3 and circulated through the heating pipe 40 and then circulated through the fourth connecting pipe L4, 50, and the fifth connecting pipe L5 to the boiler 10 through the hot water inlet 12.

Such a hot water circulation structure is formed by the driving force resulting from the reaction of the horizontal propulsion force due to the radial direction change in the water distribution pipe 20 and the resistance force against the rising velocity of the bubbles flowing into the makeup water reservoir 30, In order to circulate the hot water smoothly in this manner, the heating pipe 40 should be positioned higher than the hot water outlet 11 of the boiler.

Therefore, when the hot water circulation structure of the conventional non-powered hot water heating boiler is used for general outdoor camping where the hot water mat 60 and the boiler 10 are placed on the same ground surface, I can not.

The present invention provides a non-motorized hot water circulation promoting device for enhancing the circulation power of hot water of a non-powered hot water heating boiler so that proper heating can be realized even when a non-powered hot water heating boiler is located on the same ground as a hot water mat and a boiler. .

The non-powered hot water circulation promoting apparatus according to an embodiment of the present invention includes a hot water relay water reservoir having a water surface in which water is contained to form a water surface, and a nose inlet and a hot water sink are formed on a bottom surface; Directional switching elbow for switching the direction of movement of the rising nose discharged from the boiler to a horizontal direction and a part of the nose discharged from the nose-direction switching elbow connected to the nose-direction switching elbow and the nose- Bubbles included in the water discharged from the right side connection port of the first nursery branch point tee, which is connected to the first nursery branch tee and the hot water descending port, flows into the hot water relay tank And a second radiant water pipe for discharging the hot water contained in the radewater discharged from the right connection port of the first nadir branching tee to the heating pipe together with the hot water discharged from the hot water relay tank .

The nose inflow resistance pipe is connected to the upper part of the nose inflow port and the nose inflow resistance pipe is connected to the water surface via the air layer over the water surface, So that the nadir entering the nadir inflow port can flow through the nadir inflow resistance pipe and flow into the hot water relay reservoir.

Wherein the diameter of the hot water descending opening may be smaller than the diameter of the water inlet opening and a radial inlet resistance cap is coupled to an upper portion of the hot water descending opening and a diameter smaller than an inner diameter of the radial inlet resistance tube The hot water contained in the hot water transit water tank is discharged through the resistance hole to the second nadir off point till and the bubbles rising from the second nadir tide point till can be introduced into the hot water relay water trough.

A non-powered hot water circulation promoting apparatus according to another embodiment of the present invention includes: a hot water relay water reservoir formed with a water surface in which water is contained, a water inlet is formed on a side surface of the water surface, and a hot water drainage hole is formed on a bottom surface; Directional switching elbow for switching the direction of movement of the rising nose discharged from the boiler to a horizontal direction and a part of the nose discharged from the nose-direction switching elbow connected to the nose-direction switching elbow and the nose- Bubbles included in the water discharged from the right side connection port of the first nursery branch point tee, which is connected to the first nursery branch tee and the hot water descending port, flows into the hot water relay tank And a second radiant water pipe for discharging the hot water contained in the radewater discharged from the right connection port of the first nadir branching tee to the heating pipe together with the hot water discharged from the hot water relay tank .

According to the non-powered hot water circulation promoting apparatus according to the embodiment of the present invention, even when the boiler is placed on the floor such as the floor of the heating, circulation heating of the non-powered hot water can be realized.

In addition, only the water is supplied to the hot water relay water tank, and the air of the heating pipe is automatically discharged during the operation of the boiler, so that the effect of heating is displayed rapidly. Even if the thermal power of the boiler is excessively supplied, the water is not boiled, only the hot water circulation power is strengthened, It is possible to circulate the hot water, thereby increasing the thermal efficiency.

In addition, when applied to a briquette boiler or an oil boiler, the self circulation force is strong, so that the load of the circulation pump can be reduced and circulation heating of the non-dynamic hot water can be performed at a temperature below a certain heating area without circulating pump.

1 is a view showing a hot water circulation structure of a conventional non-powered hot water heating briquetting boiler.
2 is a view for explaining a principle of generating a spontaneous hot water circulation force of a non-powered hot water heating boiler in the process of developing the non-powered hot water circulation promoting device of FIG. 4 according to an embodiment of the present invention.
3 is a view illustrating a hot water circulation promoting device in an intermediate process of developing the non-powered hot water circulation promoting device of FIG. 4 according to an embodiment of the present invention from the non-powered hot water heating boiler of FIG. 2. FIG.
4 is a view illustrating a non-powered hot water circulation promoting apparatus according to an embodiment of the present invention.
5 is a view illustrating a non-powered hot water circulation promoting apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto.

2 is a view for explaining a principle of generating a spontaneous hot water circulation force of a non-powered hot water heating boiler in the process of developing the non-powered hot water circulation promoting device of FIG. 4 according to an embodiment of the present invention.

2, the hot water relaying receptacle 300 is filled with water to form an appropriate water surface S. The hot water receptacle 300 is provided at its bottom with two hot water ducts 310, And an air inlet 330 is formed on a side surface above the water surface S, as shown in FIG.

The nose inlet 310 is connected to the hot water outlet 110 of the boiler 100 through the nose riser R1 and the hot water descender 320 is connected to the one end of the heating pipe 250 through the hot water descending pipe R2, Lt; / RTI >

The heating pipe 250 is installed in the hot water mat 200 placed on the same surface as the boiler 10 and the other end of the heating pipe 250 is connected to the first connection pipe R4, 2 connection pipe R5 to the hot water inlet 120 of the boiler 100. [ The air inlet 330 is connected to the air outlet 155 of the air discharge tee 150 through the air discharge pipe R3.

2, the hot water discharged from the boiler 100 flows into the hot water relay tank 300 along the nose riser pipe R1, and the hot water heated in the hot water relay tank 300 flows into the hot water descending pipe R2. ≪ / RTI > The hot water circulated through the heating pipe 250 flows back to the hot water inlet 120 of the boiler 100 through the first connection pipe R4, the air discharge tee 150 and the second connection pipe R5.

That is, the boiler structure shown in FIG. 2 has a convection phenomenon caused by the temperature difference of the hot water and a natural circulation power due to the density lowering period in the hot water pipeline from the boiler 100 to the hot water relay tank 300 through the elevated pipeline R1 So that the hot water is circulated without a separate power unit.

However, when the length of the heating pipe 250 is increased on the ground, the hot circulation is not smoothly performed only by the natural circulation power as described above, so that the efficiency of heating is lowered. Therefore, a hot water circulation promoting device for increasing the circulation power of hot water in the hot water circulation structure of Fig. 2 is required.

Thus, by introducing the hot water circulation structure of FIG. 1 into FIG. 1, it is possible to place the heating pipe lower than the hot water outlet of the boiler, that is, to allow the hot water mat and the boiler to be placed on the same ground, A new hot water circulation structure enhancing the hot water circulation promotion function by using a twin water pipe is shown in FIG. 3 and described in more detail below.

3 is a view illustrating a hot water circulation promoting device in an intermediate process of developing the non-powered hot water circulation promoting device of FIG. 4 according to an embodiment of the present invention from the non-powered hot water heating boiler of FIG. 2. FIG.

In Fig. 3, the hot water mat 200 and the boiler 100 are placed on the same ground as in Fig. That is, the heating pipe 250 is positioned lower than the hot water outlet 110. In the boiler structure of FIG. 3, components having the same functions as those of FIG. 2 are denoted by the same reference numerals, and a repetitive description will be omitted.

The hot water circulation promoting apparatus according to the embodiment of FIG. 3 may include a hot water relay tank 300 and a twin water pipe 400. That is, in the boiler structure of FIG. 2, a twin water pipe 400 for connecting the hot water relay 300 to the boiler 100 and the hot water mat 200 is added.

The twin water pipe 400 may be formed by connecting the radial direction conversion elbow 410, the first water base divergence tee 420, and the second water base divergence tee 430 to each other.

One end of the elbow 410 is connected to the nose riser pipe R1 and the other end of the elbow 410 is connected to the first nose branching tee 420.

The first nose diverging tee 420 is formed with right and left through holes provided with a central soot hole and the left and right through holes are connected to the odd diverting elbow 410 and the second nose diverting tee 430 respectively, Is connected to the nose inlet 310 of the hot water relay tank 300 through the first relay pipe P1.

The second nadir bifurcation tee 430 is connected to the first nadir bifurcation tee 420 through the left throat hole and the upper through hole connects the second relay pipe P2 And is connected to the hot water descending pipe 320 of the hot water relaying receptacle 300 and the lower through hole is connected to the hot water descending pipe R2.

As a result of the performance test of the actual hot water circulation in the boiler structure of FIG. 3, it can be seen that the hot water circulation is promoted more than the boiler structure of FIG. 2, and the heating effect is also shown. However, since the hot water circulation rate was slow, the effect of heating was too late, and the thermal power used was also strong, which was not satisfactory in terms of thermal efficiency. This result is caused by the fact that the hot water circulation rate is still slow because the air bubbles flow through the first relay pipe P1 and the second relay pipe P2 in the twin water pipe 400 too quickly, This is because the water is easily introduced into the hot water transfer water tank 300 and the horizontal thrust force of the nose can not be applied to the twin water pipe 400. Therefore, the hot water circulation structure capable of further promoting the hot water circulation by improving the structure of the hot water tank water tank 300 in addition to the twin water pipe 400 is shown in FIG. 4 and will be described in more detail below.

4 is a view illustrating a non-powered hot water circulation promoting apparatus according to an embodiment of the present invention. 4, in the hot water circulation promoting apparatus according to the present invention, the hot water heated in the boiler 100 is supplied to the heating pipe 250 inside the hot water mat 200 and is returned to the boiler 100, The hot water circulating water tank 300A and the twin water pipe 400 can be constructed.

A water inlet surface 310 and a water temperature lowering hole 320 are formed on the bottom surface of the hot water relay water container 300A and an air inlet 330 and an air hole 340 are formed.

The nose inflow resistance pipe 315 is coupled to the upper part of the nose inlet 310 through the ring nipple 316 and the nose inflow resistance cap 325 is coupled to the upper part of the hot water dropping mouth 320.

The nose inflow resistance pipe 315 can be immersed in water by passing through an air layer above the appropriate water surface S or by touching the appropriate water surface S in the form of inverted U-shaped pipe. One end of the nose inflow resistance pipe 315 is lowered into the water, and is held so as to be submerged in the water while staying at a predetermined height from the bottom of the hot water relay bottle 300A. Accordingly, when the nose is introduced into the nose inflow resistance pipe 315 through the nose inflow port 310, resistance to inflow speed of the nose is provided.

The resistance hole 326 is formed on the upper surface of the nose inflow resistance cap 325. Since the water heated in the hot water relay tank 300A is very large in specific gravity compared with the rising air bubble, And the bubbles can be introduced into the hot water relay tank 300A. At this time, resistive force is generated in a direction opposite to the inflow direction of the bubbles as the bubbles flow.

The nose inflow resistance cap 325 is provided to provide convenience in adjusting the diameter of the hot water dropping hole 320. It is essential if the hot water dropping hole 320 is formed to have a proper diameter when the hot water transferring container 300A is manufactured And may be replaced with various configurations capable of adjusting the diameters of the other hot water supplying holes 320.

The air inlet 330 is connected to the air outlet 155 of the air discharge tee 150 through the air discharge pipe R3. The air in the heating pipe 250 flows into the hot water relay tank 300A through the air inlet 330. Thus, the expansion of hot water and the expansion pressure due to bubble generation can be controlled in the hot water circulation process.

The twin water pipe 400 may be configured to include a radial diverting elbow 410, a first nose diverging tee 420, and a second nose diverting tee 430.

The nose rotation diverting elbow 410 is bent at a predetermined angle to form a vertical inlet 411 and a horizontal outlet 412 in order to convert the vertical upward force of the nose into a horizontal thrust. The bent angle is preferably 90 degrees, but not limited thereto, and may be formed by bending at a modified acute angle or an obtuse angle.

The vertical inlet 411 is connected to the hot water outlet 110 of the boiler 100 through the nose riser R1 and the horizontal outlet 412 is connected to the left junction 421 of the first nose diverging tee 420 .

The first nose diverging tee 420 includes a nose riser 422 for allowing the nose received through the left connector 421 to rise in the vertical direction and a right connector 423 for moving the incoming nose in the horizontal direction, .

The nose riser 422 is connected to the nose inlet 310 of the hot water relay tank 300A through the first relay pipe P1 while the right connector 423 is connected to the left connector 431).

The second nadir bifurcation tee 430 is provided with a bubble rising port 432 for raising the bubbles contained in the nursery water flowing through the left connection port 431 and allowing the hot water of the hot water relay tank 300A to flow, And a lower connector 433 for lowering the removed hot water is provided.

The bubble rising port 432 is connected to the hot water descending hole 320 of the hot water relaying receptacle 300A through the second relay pipe P2 and the lower connecting port 433 is connected to the hot piping 250).

Hereinafter, the hot water circulation process according to the non-powered hot water circulation promoting device of FIG. 4 will be described in detail.

The nose discharged through the hot water outlet 110 heated by the boiler 100 flows into the radial direction switching elbow 410 of the twin water pipe 400 along the nose riser pipe R1 by the vertical upward force. The vertical upward force acting on the incoming nose passes through the radial direction switching elbow 410 and is converted to the horizontal thrust, and the nose is moved to the first nose diverging tee 420 by the horizontal thrust.

A part of the nose moved to the first nadir branching tee 420 flows into the nadir inlet 310 along the first relay pipe P1 by the convection phenomenon and the remaining nadir flows into the second nadir branching tee 420 do.

The nose that has flowed into the nose inlet 310 is contained in the hot water relay vessel 300A through the nose inlet resistance pipe 315. In this process, the nose receives the resistance of the water pressure to push the water from the appropriate water surface S to the water depth H1 at which the one end 317 of the nose inflow resistance pipe 315 stays, The circulation of the hot water is promoted by being added to the horizontal thrust for moving the nose which has flowed into the first nose branching tee 420.

The hot water in the nadir moved to the second nadir's diverging tee 430 descends through the lower connecting port 433 together with hot water descending from the hot water relay tank 300A along the second relay pipe P2, . In this process, the bubbles included in the nose moved to the second nose branching tee 430 rises along the second relay pipe P2 and flows through the resistance hole 326 formed on the upper surface of the nose inflow resistance cap 325, The reaction force of the resistance caused by the inflow speed of the bubbles is added to the horizontal driving force of the hot water to accelerate the downward circulation of the hot water again.

The hot water circulated through the heating pipe 250 flows through the first connecting pipe R4, the air discharging tee 150 and the second connecting pipe R5 to the outside of the boiler 100, And flows into the hot water inlet 120, thereby generating a non-motor-generated hot water circulation.

The height of the appropriate water surface S is determined in the following description, and the nose inflow resistance pipe 315 is caused to vortex through the air layer or in contact with the appropriate water surface in the water, and the one end 317 of the nose inflow resistance pipe 315, The distance from the bottom of the hot water relay bottle 300A and the size of the resistance hole 326 of the radiant inlet resistance cap 325 are determined will be described.

First, for convenience of description, specifications and materials of the construction used in the actual fabrication of the non-powered hot water circulation promoting device of FIG. 4 will be described, but it is needless to say that the embodiments of the present invention are not limited to the standards and materials described.

The hot water relay water container 300A was a heat resistant transparent square container (135 mm long × 90 mm high × 185 mm high), the radial direction conversion elbow 410 of the twin water pipe 400 used a new 8 A speed elbow, The nose divergent tee 420 and the second nose divergence tee 430 were using new stock 8A sperm. The first relay pipe P1 and the second relay pipe P2 connecting the hot water relay water container 300A and the twin water pipe 400 are made of a translucent heat resistant silicone hose having an inner diameter of 6 mm and an outer diameter of 9 mm, So that the inflow speed of the bubbles can be visually confirmed. The nose inflow resistance pipe 315 used a copper pipe having an inner diameter of 8 mm and the nose inflow resistance cap 325 formed a hole having a diameter of about 2.6 mm on the upper surface using a new 8 A gap. The heating water storage tank of the boiler 100 was a quartz bed (length 2 m * width 1 m 50 cm) used for the performance of the hot water circulation promoting device. The inner heating water storage tank of the boiler 100 had a coil 15 mm in inner diameter, Of the outer diameter of about 10 cm was wound around 5.5 wheels, and the heating appliance was a portable gas stove.

The distance between the one end 317 of the nose inflow resistance pipe 315 and the bottom of the hot water relaying receptacle 300A is maintained to be about 5 cm in the first embodiment. This is because when the heating power is excessively high at the time of operating the boiler, the hot water of the hot water relay water container 300A is evaporated and the water surface S may fall below the first depth H1, So that the water in the hot water relay water container 300A is reserved so as not to float, and warns that the water is low.

The second depth H2, which is the distance from the water surface S to one end of the nose inflow resistance pipe 315, is as important as determining the resistance to the rate of nose inflow. When the height of the hot water relay tank 300A is 18.5 cm and the nose inflow resistance pipe 315 is a 5/16 inch copper pipe (inner diameter diameter 8 mm), the experimentally optimum second depth H2 is about 7.5 cm. In the case of using the camping boiler in the case of dividing the firepower of the portable gas stove into 10 stages, the amount of air bubbles flowing into the hot water descending steel bar (320) among all the air bubbles flowing into the hot water relay tank (300A) It is approximate when it is about 20% ~ 30%. For reference, it is preferable that the amount of air bubbles flowing into the hot water ballast 320 is 5% to 10% when the firepower is a firepower suitable for the use of the camping boiler. If the amount of the bubbles flowing into the hot water dropping hole 320 is too large, the speed of the hot water falling becomes slow.

The appropriate water surface S is the amount of water required for operating the boiler for 8 hours, and in this embodiment, it is about 12.5 cm plus the first depth H1 and the second depth H. On the other hand, in order to accelerate the hot water circulation speed at a constant firepower, the actual use water surface can be made higher than the appropriate water surface (S). For this purpose, the nose inflow resistance pipe 315 can be made to pass through the air layer above the appropriate water surface S (S). In addition, the function is well expressed in the situation where the nose inflow resistance pipe 315 turns on the water below the water surface used.

The resistance hole 326 of the nose inflow resistance cap 325 is configured to reduce the inner diameter of the hot water dropping hole 320 and is about one third of the inner diameter of the nude water inflow resistance pipe 315 experimentally. This is because when the amount of bubbles flowing into the hot water dropping hole 320 exceeds about 30%, the descending rate of the hot water is significantly slowed, so that only about 20% to 30% As shown in FIG.

5 is a view illustrating a hot water circulation promoting apparatus according to another embodiment of the present invention. In the embodiment of FIG. 5, the same reference numerals are used for the same components as those of the non-powered hot water circulation promoter of FIG. 4, and a detailed description thereof will be omitted.

Referring to FIG. 5, the non-powered hot water circulation promoting device includes a hot water relay tank 300B and a twin water pipe 400. Unlike the embodiment of FIG. 4, the nose inlet 310B is formed on the upper side of the appropriate water surface S of the hot water relay tank 300B and is coupled to the nose inflow resistance pipe 315B through the ring nipple 316. FIG.

The nose inflow resistance pipe 315B is installed so as to be submerged in the water at a certain distance from the bottom of the hot water relay water container 300B at one end via the air layer in the form of an "A" self- The first nadir branching ti 420 of the twin water pipe 400 is moved to an appropriate position according to the change of the position of the nadir inlet 310B and is connected to the nadir inlet 310B through the first relay pipe P1.

That is, the embodiment of FIG. 5 shows that the non-powered hot water circulation promoting device of FIG. 4 can be variously modified according to the installation environment when it is applied to the non-powered hot water heating boiler. It will be understood that various modifications and equivalent embodiments are possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: boiler 110: hot water outlet
120: Hot water inlet 150: Air discharge tee
155: Air outlet 200: Hot water mat
250: Heating piping 300: Hot water circulation bucket
300A: hot water relay water tank 300B: hot water relay water tank
310: Nose inlet 315: Nose inlet resistance tube
315B: Nose inflow resistance pipe 317B: Nose inflow resistance pipe end
320: hot water ball 325: nose inflow resistance cap
330: air inlet 400: twin water pipe
410: Nose diverting elbow 411: Vertical inlet
412: Horizontal outflow port 420: 1st nose branching tee
421: Left connector 422:
423: Right side connector 430: 2nd nose wedge tee
431: Left connector 432: Bubble rising port
433: Lower connection port R1: Nose riser pipe
R2: hot water descent pipe R3: air discharge pipe
R4: first connection pipe R5: second connection pipe
P1: first relay tube P2: second relay tube
316: ring nipple
317: End of nose inflow resistance tube
326: nose inflow resistance hole

Claims (5)

A hot water transit water tank in which water is contained in the water tank to form a water surface,
Directional switching elbow for switching the direction of movement of the rising nose discharged from the boiler to a horizontal direction and a part of the nose discharged from the nose-direction switching elbow connected to the nose-direction switching elbow and the nose- Bubbles included in the water discharged from the right side connection port of the first nursery branch point tee, which is connected to the first nursery branch tee and the hot water descending port, flows into the hot water relay tank And a second radiant water pipe for discharging the hot water contained in the radewater discharged from the right connection port of the first nadir branching tee to the heating pipe together with the hot water discharged from the hot water relay tank Wherein the circulation pump is connected to the circulation pump. The method according to claim 1,
The nose inflow resistance pipe is connected to the upper part of the nose inflow port and the nose inflow resistance pipe is connected to the water surface by passing through the air layer over the water surface, Wherein the water supply unit is installed so as to be submerged in the water at a certain distance so that the nipple introduced into the nipple inlet port flows into the hot water water circulation passage through the nipple inlet resistance pipe. The method according to claim 1,
Wherein the diameter of the hot water descending opening is smaller than the diameter of the nose water inlet. 3. The method of claim 2,
Wherein the water inlet inflow resistance cap is provided with a resistance hole having a diameter smaller than the inner diameter of the nose inflow resistance pipe and the hot water contained in the hot water relay water canister And the bubbles rising from the second nadir breeze tee are allowed to flow into the hot water transit water canister. A hot water transit water tank in which water is contained to form a water surface, a water inlet is formed on the water surface above the water surface, and a hot water ball is formed on the bottom surface;
Directional switching elbow for switching the direction of movement of the rising nose discharged from the boiler to a horizontal direction and a part of the nose discharged from the nose-direction switching elbow connected to the nose-direction switching elbow and the nose- Bubbles included in the water discharged from the right side connection port of the first nursery branch point tee, which is connected to the first nursery branch tee and the hot water descending port, flows into the hot water relay tank And a second radiant water pipe for discharging the hot water contained in the radewater discharged from the right connection port of the first nadir branching tee to the heating pipe together with the hot water discharged from the hot water relay tank Wherein the circulation pump is connected to the circulation pump.

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