CN222418676U - Dual circuit heat exchanger - Google Patents

Abstract

The utility model belongs to the technical field of exchangers, and specifically relates to a dual-circuit heat exchanger, including a plurality of circulation pipes, each of which is provided with a liquid inlet at both ends of the lower side of the circulation pipe, each of which is provided with a liquid outlet at both ends of the upper side of the circulation pipe, and a protective enclosure is provided on the periphery of the circulation pipe, and an air supply channel for air circulation is provided in the protective enclosure, and the air supply channel passes through the plurality of the circulation pipes. Each liquid-passing pipe in the protective enclosure is matched with a liquid-passing pipe opposite thereto, and the direction of the oil in the two pipelines is arranged completely symmetrically, so that the lower temperature far end of one pipeline is close to the proximal end of the other pipeline, and the low temperature zone and high temperature zone of the two pipelines can balance and complement each other, so that the temperature of each area in the protective enclosure remains relatively balanced, avoiding temperature difference at the hot flow outlet.

Description

Double-loop heat exchanger

Technical Field

The utility model belongs to the technical field of exchangers, and particularly relates to a double-loop heat exchanger.

Background

Heat exchangers, also known as heat exchangers or heat exchange devices, are devices used to transfer heat from a hot fluid to a cold fluid to meet specified process requirements, and are an industrial application of convective heat transfer and thermal conduction.

The utility model discloses a gas heater in patent CN211060396U, including wind channel cover, flaming subassembly, heat exchange subassembly, heat conduction subassembly, fan subassembly, air supply and heat exchange subassembly are connected respectively at flaming subassembly both ends, heat exchange subassembly both ends are located the wind channel cover outside respectively, and the mid portion is located the wind channel cover, heat exchange subassembly is located the air inlet one end of fan subassembly in the wind channel cover, heat conduction subassembly is fixed in the heat exchange subassembly outside, the air current flows to air-out one end from air inlet one end in fan subassembly during operation, adopts the gas to heat, and calorific capacity is big, sets up the heat exchange subassembly in the outside of flaming subassembly, can make flame directly spout the heat exchange subassembly to improve thermal utilization effect, set up in the heat exchange subassembly and fall vortex subassembly, under the same circumstances of calorific capacity, can reduce the length of heat exchange subassembly, and then reduce the volume of whole system heater.

In the above scheme, the heat exchange tube extends from one side of the air duct cover to the other side of the box body, and a U-shaped bent structure is shown in the air duct cover to improve the heat exchange effect, but the heat source substance in the heat exchange tube only flows from one end to the other end of the pipeline, and the heat source substance gradually loses heat as the heat source substance flows in the tube, so that a larger temperature difference exists between the heat available at the rear end and the front end of the heat exchange tube, which leads to uneven temperature of air flow discharged from the air duct cover, and particularly, uneven texture of a workpiece is caused in the coating process for heating after gluing, so that the product quality is seriously affected.

Disclosure of utility model

The present utility model aims to solve the above problems, and provides a dual-circuit heat exchanger which can solve the above technical problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The double-loop heat exchanger is characterized by comprising a heat exchanger body formed by combining two snakelike circulating pipelines, wherein a liquid inlet and a liquid outlet of one circulating pipeline are positioned on one side of the heat exchanger body and extend out from the radial direction of a protection enclosure, a liquid inlet and a liquid outlet of the other circulating pipeline are positioned on the other side of the heat exchanger body and extend out from the radial direction of the protection enclosure, one side of the heat exchanger body and the other side of the heat exchanger body are in opposite distribution, and the two circulating pipelines exchange heat with each other.

In the double-loop heat exchanger, the circulating pipeline comprises a plurality of straight pipes and bent pipes, and the bent pipes are used for communicating two adjacent straight pipes to form a serpentine pipeline channel which rotates reciprocally between the liquid inlet and the liquid outlet.

In the double-loop heat exchanger, heat radiating fins are sleeved on the straight pipes, and the upper straight pipes and the lower straight pipes are mutually overlapped by the heat radiating fins.

In the double-circuit heat exchanger, the bent pipes are in a semicircular shape with a 180-degree bent angle, and the straight pipes are parallel to each other and keep the same distance.

In the dual-loop heat exchanger, the protection enclosure comprises a filter screen and a partition plate, the partition plate is arranged at two sides of the liquid inlet and the liquid outlet, and the filter screen is used for connecting the two partition plates together in an annular mode.

In the double-loop heat exchanger, the filter screen and the partition plate are surrounded to form the air supply channel, and the circulating pipelines are horizontally and uniformly arranged in the air supply channel.

In the double-loop heat exchanger, a transition cavity is arranged at the joint of the circulating pipeline and the liquid inlet and the liquid outlet, and the transition cavity is provided with an inner diameter larger than that of the circulating pipeline.

In the double-loop heat exchanger, the pipeline ports of the circulating pipelines in the same direction are connected to the same transition cavity, and the transition cavity is also provided with an oil seepage flange.

The utility model has the advantages that:

Each liquid passing pipeline in the protection enclosure is matched with the corresponding liquid passing pipeline, the directions of oil in the two pipelines are completely symmetrically arranged, the far end of one pipeline with lower temperature is close to the near end of the other pipeline, the low-temperature area and the high-temperature area of the two pipelines can be balanced and complemented with each other, the temperature of each area in the protection enclosure is kept relatively balanced, and the temperature difference of a heat flow air outlet is avoided.

Each pipeline is set to be in a liquid inlet mode of an upper outlet of a lower inlet, so that heat of a lower high-temperature section is contacted with an upper low-temperature section in the rising process, the defect of the temperature of an upper end is overcome, and heat waste caused by liquid inlet of the upper section is avoided. Meanwhile, a transition cavity is arranged at the liquid inlet and is used for summarizing and connecting all the oil liquid pipes, so that heat quantity difference in all the oil liquid pipes is avoided.

Drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a top view of the present utility model.

Fig. 3 is a side view of the present utility model.

FIG. 4 is a schematic view of the circulation pipeline structure of the present utility model.

In the illustration, a liquid inlet 1, a liquid outlet 2, a protection fence 3, a filter screen 31, a partition plate 32, an air supply channel 4, a circulating pipeline 5, a straight pipe 51, a bent pipe 52 and a transition cavity 6.

Detailed Description

The following are specific embodiments of the utility model and the technical solutions of the utility model will be further described with reference to the accompanying drawings, but the utility model is not limited to these embodiments.

Example 1

As shown in fig. 1 to 4, the dual-circuit heat exchanger is characterized by comprising a heat exchanger body formed by combining two serpentine circulation pipes 5, wherein a liquid inlet 1 and a liquid outlet 2 of one circulation pipe 5 are positioned on one side of the heat exchanger body and extend out of a protection fence 3 in the radial direction, a liquid inlet 1 and a liquid outlet 2 of the other circulation pipe 5 are positioned on the other side of the heat exchanger body and extend out of the protection fence 3 in the radial direction, one side and the other side are distributed relatively, and the two circulation pipes 5 exchange heat with each other.

That is, each liquid passing pipeline in the protection enclosure is matched with the corresponding liquid passing pipeline, the trend of the oil in the two pipelines is completely symmetrically arranged, so that the far end of one pipeline with lower temperature is close to the near end of the other pipeline, the low-temperature area and the high-temperature area of the two pipelines can be balanced and complemented with each other, the temperature of each area in the protection enclosure is kept relatively balanced, and the temperature difference of the hot flow air outlet is avoided.

The liquid inlet 1 and the liquid outlet 2 of the circulating pipeline 5 are arranged on the same side, and the two circulating pipelines 5 are respectively connected with a set of circulating heating system, so that the circulating heating system of oil can be arranged on one side of the protection fence 3, and the ineffective loss of heat is avoided by reducing the pipeline length outside the protection fence 3.

Preferably, the circulating pipeline 5 comprises a plurality of straight pipes and bent pipes, and the bent pipes are used for communicating two adjacent straight pipes to form a serpentine pipeline channel which rotates reciprocally between the liquid inlet 1 and the liquid outlet 2, so that the contact area between the serpentine pipeline channel and air is increased, and the heat exchange efficiency is greatly improved under the condition of not increasing the occupied space.

Preferably, the straight pipes are sleeved with radiating fins, and the radiating fins are used for mutually overlapping the upper straight pipe and the lower straight pipe.

The heat dissipation fins can additionally increase the contact area between the pipeline and the air, and strengthen the temperature exchange between different sections of the pipeline, so that the heat in each section of pipeline is more uniform.

Preferably, the bent pipe is in a semicircular shape with a 180-degree bent angle, and the straight pipes are parallel to each other and keep the same distance.

Maintaining the same spacing between the straight tubes can control the amount of heat accumulated at various locations within the protective enclosure 3 to remain within a stable value.

In this embodiment, the protection enclosure 3 includes a filter screen 31 and a partition plate 32, the partition plate 32 is set up on two sides of the liquid inlet 1 and the liquid outlet 2, and the filter screen 31 connects the two partition plates 32 together in a ring shape.

The fan for blowing heat flow is operated towards the filter screen 31 to send heat to the workpiece, the filter screen 31 can filter sundries carried in the air flow to enter the protection enclosure 3 so as to protect the heating pipeline, the partition plate 32 isolates the air flow from the oil liquid pipeline outside the protection enclosure 3, and the oil liquid pipeline is prevented from contacting the air flow to lead heat to be lost in advance.

Preferably, the filter screen 31 and the partition plate 32 are surrounded to form the air supply channel 4, and the plurality of circulation pipes 5 are horizontally and uniformly arranged in the air supply channel 4.

In this embodiment, a transition chamber 6 is provided at the junction of the circulation pipe 5 with the liquid inlet 1 and the liquid outlet 2, and the transition chamber 6 has an inner diameter larger than that of the circulation pipe 5.

The oil in the pipeline enters the transition cavity 6 with larger volume, and is converged into a certain amount in the transition cavity 6 and then is introduced into the protective enclosure 3, so that air possibly carried in the oil in the process can be blocked in the transition cavity 6, and the heat exchange rate of the heat exchanger is improved.

Preferably, the pipeline ports of the circulating pipelines 5 in the same direction are connected to the same transition cavity 6, and the transition cavity 6 is also provided with an oil seepage flange.

The oil liquid in the pipelines is converged into the same transition cavity 6, so that the temperature difference of the oil liquid in each pipeline can be synthesized, the temperature difference of the oil liquid in each pipeline which then enters the protective enclosure 3 is reduced, and the balanced temperature of each position in the protective enclosure 3 is ensured.

Example 2

On the basis of the embodiment 1, the arrangement mode of the circulating pipeline 5 is changed, the circulating pipeline 5 comprises two circulating pipelines 5 which are symmetrically stacked together, one end of each circulating pipeline 5 is communicated with the liquid inlet 1, and the other end of each circulating pipeline 5 is communicated with the liquid outlet 2 on the opposite side.

The two sides of the protection fence 3 are respectively connected with a set of circulating heating system, and only the outflow opening of one pipeline is led into the inflow opening of the other pipeline after being heated by the system, so that the self-circulation mode of the pipeline is changed, and oil can pass through the two sets of circulating heating systems, thereby balancing the difference of the two sets of circulating heating systems again.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims (8)

1. The double-loop heat exchanger is characterized by comprising a heat exchanger body formed by combining two serpentine circulating pipelines (5), wherein a liquid inlet (1) and a liquid outlet (2) of one circulating pipeline (5) are positioned on one side of the heat exchanger body and extend out of a protection enclosure (3) in the radial direction, the liquid inlet (1) and the liquid outlet (2) of the other circulating pipeline (5) are positioned on the other side of the heat exchanger body and extend out of the protection enclosure (3) in the radial direction, one side of the circulating pipeline and the other side of the circulating pipeline are distributed relatively, and the two circulating pipelines (5) perform mutual heat exchange.

2. The dual-circuit heat exchanger according to claim 1, wherein the circulating pipeline (5) comprises a plurality of straight pipes and bent pipes, and the bent pipes are used for communicating two adjacent straight pipes so as to form a serpentine pipeline channel which rotates reciprocally between the liquid inlet (1) and the liquid outlet (2).

3. The dual circuit heat exchanger as claimed in claim 2, wherein said straight tubes are provided with heat radiating fins, said heat radiating fins overlapping each of said straight tubes.

4. The dual circuit heat exchanger of claim 2 wherein said bent tube is in the form of a semicircle having a 180 ° bend, each of said straight tubes being parallel to each other and maintaining the same spacing.

5. The dual-circuit heat exchanger according to claim 1, wherein the protective enclosure (3) comprises a filter screen (31) and a partition plate (32), the partition plate (32) is arranged at two sides of the liquid inlet (1) and the liquid outlet (2), and the filter screen (31) is used for connecting the two partition plates (32) together in a ring shape.

6. The dual-circuit heat exchanger according to claim 5, wherein the filter screen (31) and the partition plate (32) are surrounded to form the air supply passage (4), and the plurality of circulation pipes (5) are horizontally and uniformly arranged in the air supply passage (4).

7. Double circuit heat exchanger according to claim 1, characterized in that the connection of the circulation pipe (5) with the inlet (1) and outlet (2) is provided with a transition chamber (6), the transition chamber (6) having an inner diameter larger than the circulation pipe (5).

8. The double circuit heat exchanger according to claim 7, wherein the same orientation of the pipe ports of each circulation pipe (5) is connected to the same transition chamber (6), and the transition chamber (6) is further provided with an oil-permeable flange.