Heat exchanger with long and short inner pipes attached and communicated through bent pipes

Abstract

A heat exchanger with long and short inner pipes attached and communicated through bent pipes is characterized in that a plurality of outer pipes are communicated only through large communicating pipes, end sockets of the outer pipes are provided with warm air inlet and outlet threaded head seats and comprise deflation valves, the pipe walls of the outer pipes are provided with tap water inlet and outlet threaded head seats communicated with the inner pipes, and a plurality of inner pipes are arranged in the outer pipes and are tightly attached. The inner pipes are welded to be communicated with the welded junctions firstly, and then the inner pipe end sockets at the two ends of the inner pipes are welded, and is characterized in that the inner pipes in the outer pipes are tightly attached, connected in series and arranged in a penetrating mode, the inner pipes are two long inner pipes, the two long inner pipes are communicated with the inner pipes in the other outer pipes through bent communicating pipes, and the bent communicating pipes are communicated with the inner pipes in the other outer pipes. When the outer pipes are horizontally arranged, the tap water threaded head seat arranged on the outer pipe at the uppermost end is welded and communicated through the small communication pipe, the efficient heat exchange effect is achieved in the heating mode that the multiple inner pipes are attached to one another and huddled, and hot water continuously flows out.

Description

Technical Field

[0001] The invention belongs to the technical field of civil heating, and in particular relates to a heat exchanger. Background Art

[0002] When plumbers reserve the installation position of the floor heating manifold, they often leave space for the heat exchanger by digging a hole in the wall. The conventional wall is 24 cm thick and the hole is 12 cm deep. The height is 800 × the width is 800, which is exactly the size of a floor tile as a door cover. The door cover is a prerequisite for beautiful decoration. In the prior art, the heat exchanger closely connected to the manifold adopts a brazed plate heat exchanger. The biggest advantage of this heat exchanger is its small size. It can exchange hot water without wasting a lot of space. However, this heat exchanger has requirements for water pressure and water quality. Brazed plate heat exchangers cannot be installed in areas with poor water quality and a lot of scale. This is because the plates of the brazed plate heat exchanger are sealed with rubber pads and the waterway space is small, which causes a lot of scale accumulation and blockage, and thus the heat exchanger is abandoned. Summary of the invention

[0003] The purpose of the present invention is to provide a new type of tube-row heat exchanger to better meet the user's requirements in view of the problems existing in the above-mentioned prior art.

[0004] A heat exchanger in which inner tubes are fitted with different lengths and connected with bent tubes, several outer tubes are connected through a large connecting tube, a heating inlet and outlet thread head is arranged on the outer tube cover and includes an air release valve, a tap water inlet and outlet thread head connected with the inner tube is arranged on the tube wall of the outer tube, several inner tubes are arranged in close contact with each other in the outer tube, several inner tubes are welded to the inner tube connecting welds first, and then the inner tube covers at both ends of the inner tubes are welded, characterized in that: the several inner tubes in the several outer tubes are closely fitted and arranged in series, the several inner tubes are arranged with two longer inner tubes, and the two longer inner tubes are connected with the inner tubes in the other outer tubes by a bent connecting tube, and when the outer tubes are arranged in a horizontal row, the tap water thread head arranged on the uppermost outer tube is connected by welding with a small connecting tube.

[0005] The inner tube length of the two inner tube lengths, one close to the middle one, is arranged with a welding port facing upwards, and the welding port is vertically connected to the tap water thread head seat arranged on the uppermost outer tube, and is welded and connected by a small connecting pipe. The other inner tube length is arranged at the edge of the inner tubes, and the inner tube length is arranged with a welding port facing downwards, and the welding port of the inner tube length is welded downwards to the bent connecting pipe, and the other end of the bent connecting pipe is inserted and welded with the welding port of one of the inner tube lengths among the inner tubes within the outer tubes, and the bent connecting pipe is welded and connected to the tap water thread head seat of the outer tube at the lowermost end when the outer tubes are placed horizontally.

[0006] The curved connecting pipe is parallel and vertical near the two end surfaces, and the middle part is a curved line.

[0007] The inner tube inside the outer tube fits tightly and is arranged through-through. There are two long inner tubes among the several inner tubes. The two long inner tubes are connected by punching, flanging and stretching circular steps near the inner tube port. The other inner tube is also connected by punching, flanging and stretching circular steps near the inner tube port. The outer diameter of one of the two circular steps is inserted into the inner diameter of the other circular step to fit tightly to form an inner tube connecting weld. The welding gun is inserted into the inner tube connecting weld of the inner tube circular step, welded and sealed, and then the inner tube head is welded. The inner tubes are welded in this way to form several connected inner tubes.

[0008] When the outer tube is placed horizontally, the heating inlet and outlet arranged on the uppermost and lowermost heads of the outer tube can be directly connected to the water distributor. The setting of the heating inlet and outlet deviating from the center position of the head is to reserve installation channels for the two rows of pipes on the water distributor.

[0009] When the outer tubes are placed horizontally, the uppermost and lowermost ends of the outer tubes are provided with water inlet and outlet water thread seats, and the other end of the uppermost end of the outer tubes is provided with an air release valve of the heating water thread seat, and the other side of the lowermost outer tubes is provided with a spare thread seat for the heating thread seat.

[0010] The sealing head is arranged in a U-shaped bend shape, wherein a circular flat surface at one end of the U-shaped bend shape is tightly inserted into the inner diameter of the outer tube, and the end face of the U-shaped bend shape is a convex flat end face with steps.

[0011] The plurality of inner tubes within the plurality of outer tubes are tightly fitted and arranged in parallel, preferably in series.

[0012] Beneficial Effects In an outer tube, a number of inner tubes are closely fitted and arranged in two layers, with three inner tubes on the top and three on the bottom. Figure 3 As shown, one end of the right inner tube of the upper three inner tubes enters, and the other end exits vertically and enters the right inner tube of the lower three inner tubes, the right end of the lower three inner tubes exits horizontally and enters the middle inner tube of the lower three inner tubes, the other end of the middle inner tube of the lower three inner tubes exits horizontally and enters the left inner tube of the lower three inner tubes, the left inner tube of the lower three inner tubes enters vertically into the left inner tube of the upper three inner tubes, the other end of the left inner tube of the upper three inner tubes enters horizontally into the middle tube of the upper three inner tubes, and the upper three inner tubes This end of the middle inner tube is connected to the tap water hot water outlet on the outer tube or the inner tube inside the previous appearance through a vertically bent inner tube. In an outer tube, the inner tubes are arranged in parallel up and down, and each inner tube is connected without a gap. There are both vertical and horizontal connections. The difference is that the two inner tubes on the right side of the top three tubes are longer than the other four tubes. The two extended inner tubes are connecting channels to the inner tubes in the upper and lower outer tubes, and also serve as channels connecting the tap water inlet and outlet.

[0013] It is like fingers that are not aligned, but each has its own use. There are two longer inner tubes among the inner tubes, and three inner tubes are arranged in an upper and lower arrangement. The length of two of the upper three tubes exceeds the length of the other four tubes, which solves the problem of several inner tubes being closely fitted to form a series connection for convenient welding. If two extra-long tubes are not arranged, the series connection between the outer tube and the inner tube cannot be completed. The most critical thing is to achieve the heat exchange between the inner tubes, and creatively realize the formation of tubes sticking to tubes in the inner tubes for heating, which is more convenient for series welding. Assuming that six inner tubes are arranged in a circular fit, the best effect of heat transfer between single tubes in series cannot be achieved, and the heat of the heat rise principle cannot be effectively absorbed, just like the effect of good thermal efficiency when people sleep with their shirts down. If six inner tubes are arranged in a circular fit, the biggest defect is that the single tube circular arrangement does not meet the welding process requirements, and a connecting tube must be used to form a large and small angle, and the inner tube is not straight and leaks after welding.

[0014] The curved connecting pipe arranged in the outer pipe plays a connecting role between the upper and lower parts. The conventional setting mostly adopts U-shaped bends, and the U-shaped bends are fixed on the outside of the heads at both ends of the outer pipe, and then U-shaped buckle cap heads are added to seal the U-shaped bends inside, which is usually called a connecting box structure. With this setting, heat is not effectively utilized and thermal energy is lost. The most critical thing is the internal pressure expansion, and the connecting box structure is too large and deviates from the circular structure and leaks.

[0015] The inner tube is extended in several strip directions, and the two long ones are connected with the curved connecting tube, which effectively avoids the defect that the inner tubes in the upper and lower outer tubes cannot be connected when the inner tubes are adjacent to each other. Assuming that the inner tubes are connected in parallel, there will be no efficient countercurrent heat exchange effect. Because the installation space of the heat exchanger is limited, the shape of the heat exchanger cannot be large. This is a prerequisite of the present invention. In the prior art, copper tubes and stainless steel thin tubes are held in a U-bend in a single string, and a length of 30 meters and 40 meters is used. Faced with the low-temperature water inlet of the floor heating, the effect after heat exchange is poor and cannot be used for taking a shower. The ultimate reason is that the tubes cannot fit together, and the thermal efficiency of the heat energy cannot be effectively utilized. It is also impossible to achieve the connection between the adjacent outer tubes by only relying on the two extended inner tubes. Only by connecting the curved connecting tubes in the outer tube of the present invention can not only ensure the effective utilization of heat energy, but the most important thing is to comply with the welding process, and to achieve stable product quality is the hard truth. The shape of the curved connecting pipe is similar to an S-shaped movement. It can pass through the large connecting pipe between the outer pipes, and also take into account the connecting welding of the inner pipes in several branches of the outer pipes. The curved connecting pipe is set in the warm water area. It can not only connect tap water, but also has a good heat exchange effect.

[0016] The bent connecting pipe is set up to connect the upper and lower welding points which are not on a straight line so as to achieve convenient welding when the welding points are on a straight line. For example, if two 90-degree bends are adopted, the first is that the bending radius is small and the pipe wall is deformed. The second is that the resistance is increased and the flow rate is affected. The third is that a bent connecting pipe is set up in a narrow outer pipe, which is not a conventional setting. The inner pipe is set up with long and short lengths to connect the upper and lower bending connecting pipes. The bending radius is too large and the inner diameter space of the outer pipe cannot be placed. Only the two long inner pipes can be matched with the bent connecting pipes. When the outer pipes are placed horizontally, the tap water thread head seat set on the uppermost outer pipe and the inner pipe near the middle of the longest inner pipe are set with the welding port facing upwards, and they are connected by vertical welding up and down through a small connecting pipe; The two long inner tubes, one of which is close to the middle one, are provided with a welding port facing upwards, which is welded to a small connecting tube, and the other end of the small connecting tube is connected to a water thread head seat of an outer tube, so that the heating method of a plurality of inner tubes set in the present invention can be realized, and there will be an efficient heat exchange effect, with hot water flowing out continuously.

[0017] The importance of this invention in the current market is self-evident. Due to the small position of the brazing plate heat exchanger next to the matching floor heating manifold, there are indeed a large number of leakage, blockage and damage in the market operation for more than 10 years. The leakage is because the brazing plates are sealed with rubber pads. When the air pressure expands, the sealing rubber pads cannot play a role and leak; the blockage is because the narrow waterway between the brazing plates is blocked by scale and cannot be repaired and scrapped. This requires alternative products, that is, the patented technology of this invention is particularly important.

[0018] In summary, the heat exchanger of the present invention has a compact structure, beautiful appearance, reliable performance, further improved heat exchange effect, expanded continuous use of hot water, is very convenient to manufacture, install and use, and has a large market demand.

[0019] Description of the drawings.

[0020] Figure 1 It is a front structural cross-sectional schematic diagram of the present invention.

[0021] Figure 2 yes Figure 1 Schematic side cross-sectional view of .

[0022] Figure 3 yes Figure 1 A partial schematic diagram of water flow in the inner tube. The single arrow indicates water entering from the other end, and the double arrow indicates water entering from this end.

[0023] Figure 4 yes Figure 1 Schematic side cross-sectional view of .

[0024] Figure 5 It is a schematic diagram of a curved connecting pipe.

[0025] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown: a heat exchanger in which inner tubes are fitted with different lengths and connected with bent tubes, several outer tubes 1 are connected through a large connecting tube 6, a heating inlet and outlet thread head seat 3 is arranged on the sealing head 2 of the outer tube 1 and includes an air release valve 13, a tap water inlet and outlet thread head seat 5 connected with the inner tube 4 is arranged on the tube wall of the outer tube 1, several inner tubes 4 are arranged in close contact with each other in the outer tube 1, several inner tubes 4 are first welded with inner tube connecting welds 11, and then the inner tube sealing heads 12 at both ends of the inner tube 4 are welded, characterized in that: several inner tubes 4 in the several outer tubes 1 are closely fitted and arranged in series, two inner tubes 4 with a length of 4-1 are arranged in the several inner tubes 4, and the two inner tubes with a length of 4-1 are connected with the inner tube 4 in another outer tube 1 by a bent connecting tube 7, and when the outer tubes 1 are placed in a horizontal row, the tap water thread head seat 5 arranged on the uppermost outer tube 1 is connected by welding with a small connecting tube 8.

[0027] The inner tube length 4-1 of the two inner tubes 4-1 close to the middle is set with a welding port 9 upward, and the welding port 9 is vertically connected to the tap water thread head seat 5 set on the uppermost outer tube 1, and is connected by a small connecting pipe 8 welding up and down. The other inner tube length 4-1 is set on the edge of several inner tubes 4, and the inner tube length 4-1 is set with a welding port 10 downward. The welding port 10 of the inner tube length 4-1 is welded to the bent connecting pipe 7 downward, and the other end of the bent connecting pipe 7 is inserted into and welded with the welding port 9 of one of the inner tube length 4-1 of several inner tubes 4 in the outer tubes 1. The bending connecting pipe 7 is welded and connected to the tap water thread head seat 5 of the lowermost outer tube 1 when the outer tube 1 is placed horizontally.

[0028] The curved connecting pipe 7 is parallel and vertical near the two end surfaces, and the middle part is a curved line.

[0029] The inner tube 4 in the outer tube 1 fits tightly and is arranged through. Among the several inner tubes 4, there are two with an inner tube length of 4-1. The two inner tubes with a length of 4-1 are connected by punching, flanging and stretching a circular step near the end of the inner tube 4. The other inner tube 4 is also punched, flanging and stretching a circular step near the end of the inner tube 4. The outer diameter of one of the two circular steps is inserted into the inner diameter of the other circular step to fit tightly to form an inner tube connecting weld 11. The welding gun is inserted into the inner tube connecting weld 1 of the circular step of the inner tube 4, and then welded to seal it, and then welded to the inner tube head 12. The inner tube 4 is welded in this way to form several connected inner tubes 4.

[0030] When the outer tube 1 is placed horizontally, the heating inlet and outlet 3 arranged on the uppermost and lowermost ends of the outer tube 1 can be directly connected to the water distributor. The setting of the heating inlet and outlet 3 deviating from the center of the end cap 2 is to reserve installation channels for the two rows of pipes on the water distributor.

[0031] When the outer tube 1 is placed horizontally, the uppermost and lowermost ends of the outer tube 1 are provided with tap water inlet and outlet water thread head seats 5, and the other end of the uppermost end of the outer tube 1 is provided with an air release valve 13 of the heating water thread head seat 3, and a spare thread head seat for the heating thread head seat 3 is provided on the other side of the lowermost outer tube 1.

[0032] The sealing head 2 is provided with a U-shaped bend 14, wherein a circular flat surface at one end of the U-shaped bend 14 is tightly inserted into the inner diameter of the outer tube, and the end face of the U-shaped bend 14 is a convex flat end face with steps.

[0033] The plurality of inner tubes 4 within the plurality of outer tubes 1 are tightly fitted and arranged in parallel, preferably in series.

[0034] In embodiment 1, the heating inlet and outlet are arranged on the head and are offset from the center point of the head. The heating inlet of the head of the uppermost outer tube is arranged inward from the center point, and the heating inlet and outlet of the head of the lowermost outer tube is arranged outward from the center point.

[0035] In the second embodiment, heating inlets and outlets are arranged at the center points of the sealing heads of the uppermost outer tube and the lowermost outer tube.

[0036] The present invention is not limited to the above-mentioned specific implementation modes. Professionals and technicians in this field can make other various forms of specific changes under the guidance of the present invention without departing from the protection scope of the claims of the present invention, including the replacement of simple materials, which all fall within the protection scope of the present invention.

Claims

1. A heat exchanger in which inner tubes are fitted with different lengths and connected with bent tubes, a plurality of outer tubes (1) are connected with each other through a large connecting tube (6), a heating inlet and outlet thread head seat (3) and a vent valve (13) are arranged on the end cap (2) of the outer tube (1), a tap water inlet and outlet thread head seat (5) connected with the inner tube (4) is arranged on the tube wall of the outer tube (1), a plurality of inner tubes (4) are arranged in close contact with each other in the outer tube (1), a plurality of inner tubes (4) are welded with inner tube connecting welds (11) first, and then the inner tube ends (12) at both ends of the inner tube (4) are welded, characterized in that: The plurality of inner tubes (4) in the plurality of outer tubes (1) are tightly fitted and arranged in series. The plurality of inner tubes (4) are provided with two inner tubes of the same length (4-1). The two inner tubes of the same length (4-1) are connected to the inner tubes (4) in the other outer tubes (1) by a bent connecting tube (7). When the outer tubes (1) are arranged in a horizontal row, the tap water thread head seat (5) provided on the uppermost outer tube (1) is connected by welding through a small connecting tube (8).

2. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: The inner tube length (4-1) of the two inner tube lengths (4-1) close to the middle is arranged with a welding port facing upward (9), and the welding port facing upward (9) is vertically connected to a tap water thread head seat (5) arranged on the uppermost outer tube (1), and is connected by welding up and down through a small connecting tube (8). The other inner tube length (4-1) is arranged at the edge of a plurality of inner tubes (4), and the inner tube length (4-1) is arranged with a welding port facing downward (10). The welding port of the inner tube length (4-1) is welded downward (10) to a bent connecting tube (7), and the other end of the bent connecting tube (7) is inserted and welded to an inner tube length (4-1) of a plurality of inner tubes (4) in the plurality of outer tubes (1) with a welding port facing upward (9). The bent connecting tube (7) is welded to the tap water thread head seat (5) of the lowermost outer tube (1) when the outer tube (1) is placed horizontally.

3. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: The curved connecting pipe (7) is parallel and vertical near the two end surfaces, and has a curved line in the middle.

4. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: The inner tube (4) in the outer tube (1) is tightly fitted and arranged through. Among the plurality of inner tubes (4), there are two inner tubes of the same length (4-1). The two inner tubes of the same length (4-1) are connected by punching, flanging and stretching annular steps near the end of the inner tube (4). The other inner tube (4) is also punched, flanging and stretching annular steps near the end of the inner tube (4). The outer diameter of one of the two annular steps is inserted into the inner diameter of the other annular step to fit tightly, forming an inner tube connecting weld (11). The welding gun is inserted into the inner tube connecting weld (1) of the annular step of the inner tube (4), welded and sealed, and then the inner tube head (12) is welded. The inner tubes (4) are welded in this way to form a plurality of connected inner tubes (4).

5. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: When the outer tube (1) is placed horizontally, the heating inlet and outlet (3) provided on the uppermost and lowermost ends of the end cap (2) of the outer tube (1) can be directly connected to the water distributor. The arrangement of the heating inlet and outlet (3) deviating from the center of the end cap (2) is to provide installation channels reserved for the two rows of pipes on the water distributor.

6. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: When the outer tubes (1) are arranged in a horizontal row, the uppermost and lowermost ends of the outer tubes (1) are provided with water inlet and outlet water thread heads (5), and an air release valve (13) of the heating water thread head head (3) is provided at the other end of the uppermost end of the outer tubes (1), and a spare thread head head for the heating thread head head (3) is provided on the other side of the lowermost outer tubes (1).

7. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: The sealing head (2) is provided with a U-shaped bend (14), wherein a circular flat surface at one end of the U-shaped bend (14) is tightly inserted into the inner diameter of the outer tube, and the end surface of the U-shaped bend (14) is a protruding flat end surface with a step.

8. The heat exchanger with inner tubes of different lengths and connected by bent tubes according to claim 1, characterized in that: The plurality of inner tubes (4) within the plurality of outer tubes (1) are tightly fitted and arranged in parallel, preferably in series.

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