TW202014652A - Heat exchanger - Google Patents

Abstract

A heat exchanger is provided to solve the problem where the heat exchanging effect of the conventional heat exchanger is poor. The heat exchanger includes a hollow tube having an air inlet and an air outlet, and a heat guiding module mounted in the hollow tube and including a plurality of heat conductive plates and a plurality of wings. A liquid inlet and a liquid outlet are located between the air inlet and the air outlet. Each heat conductive plate includes a liquid channel intercommunicating with the liquid inlet and the liquid outlet. The wings are located between two adjacent heat conductive plates. Each wing includes a plurality of concave portions and a plurality of convex portions connected to the heat conductive plate. An outer surface of each wing is rough. An air channel forms between two adjacent wings and intercommunicates with the air inlet and the air outlet.

Description

Heat exchange device

The invention relates to a heat exchange device, especially a heat exchange device used for gas-liquid heat exchange.

General boilers, incinerators, etc. generate a large amount of high-temperature exhaust gas due to operation, and these high-temperature exhaust gas usually must be properly cooled to be discharged into the atmospheric environment, so as to meet the requirements of environmental protection. In the process of reducing the temperature of the high-temperature exhaust gas mentioned above, in order to fully reuse the high-temperature exhaust gas, some manufacturers will apply it to the facilities of the heat exchange device. The conventional heat exchange device has a hollow tube body and a plurality of heat conduction tubes located in the hollow tube body, the outer periphery of the heat conduction tube has a plurality of fins, and one end of the heat conduction tubes protrudes into a water storage tank According to this, when the high-temperature exhaust gas enters the hollow pipe body, its high-temperature thermal energy can be conducted to the water storage tank through the heat transfer tubes, in order to increase the temperature of the water in the water storage tank. An example of a heat exchange device similar to the conventional one has been disclosed in the patent case of the Republic of China Announcement No. 472864 "Thermal Energy Recovery Device for Waste Gas (2)".

In the above-mentioned conventional heat exchange device, most of the heat pipe is made of high heat transfer materials such as copper or aluminum, etc., and the outer surface of the heat pipe is relatively flat, so that the contact area of the high temperature exhaust gas and the heat pipe is relatively small. However, in order to improve the heat exchange effect, the high-temperature exhaust gas usually stays at the heat pipe for a longer period of time, so that the flow rate of the high-temperature exhaust gas in the hollow tube body will be slowed down, so that the high-temperature exhaust gas enters the hollow The tube body is easy to form a blockage, which leads to poor heat exchange effect.

In view of this, the conventional heat exchange device does still need to be improved.

In order to solve the above-mentioned problems, the object of the present invention is to provide a heat exchange device, which can prevent high-temperature exhaust gas from entering into the hollow pipe body to form a blocker.

The next object of the present invention is to provide a heat exchange device that can increase the structural strength of the heat exchange device.

Another object of the present invention is to provide a heat exchange device that can increase the smoothness of the flow guide.

Still another object of the present invention is to provide a heat exchange device which can avoid the mixing of cold water body and hot water body.

The following directivity or similar terms of the invention, such as "front", "rear", "left", "right", "upper (top)", "lower (bottom)", "inner", "outer" , "Side", etc., mainly refer to the directions of the attached drawings, and each directivity or its approximate terms are only used to help explain and understand the embodiments of the present invention, not to limit the present invention.

The heat exchange device of the present invention includes: a hollow tube body having an air inlet and an air outlet opposite to each other, a liquid inlet and a liquid outlet between the air inlet and the air outlet; and a heat conduction group , Located in the hollow tube body, the heat-conducting group has several heat medium plates and several fins, and each liquid flow path of each heat medium plate connects the liquid inlet and the liquid outlet, the number of The fins are located between the two adjacent heat medium plates, each of the fins respectively has a plurality of concave portions and a plurality of convex portions connected, and the outer surface of each fin has a roughness, the adjacent two A gas flow channel is formed between the fins, and the gas flow channels communicate with the gas inlet and the gas outlet.

Accordingly, the heat exchange device of the present invention utilizes the concave portions and the convex portions of each fin, and the outer surface of each fin has a roughness, which can increase the contact area of the high-temperature exhaust gas and make the high-temperature exhaust gas stop There is no need to stay in each of the gas flow channels for too long, which can improve the heat transfer performance, to avoid the formation of blockage when high-temperature exhaust gas enters the hollow tube body, thereby having the effect of improving the overall heat exchange efficiency.

Wherein, the hollow tube body has a first guide channel and a second guide channel, the first guide channel communicates with the liquid inlet, the second guide channel communicates with the liquid outlet, and the first The flow guiding channel and the second flow guiding channel are connected through the plurality of liquid flow channels. In this way, it has the effect of avoiding the mixing of cold water body and hot water body.

Wherein, the heat conduction group and the hollow tube body are made by integral molding. In this way, it has the effect of enhancing the structural strength of the heat exchange device.

Among them, the heat conduction group and the hollow tube system are made by 3D printing technology. In this way, it has the effect of reducing assembly costs.

Wherein, the outer surface of the heat medium plate and the inner surfaces of the liquid channels have roughness. In this way, it has the effect of increasing the contact area to improve the heat transfer performance.

Among them, the roughness Ra<50um. In this way, it has the effect of providing better heat transfer performance.

Wherein, each of the heat medium plates has two opposite diversion cutting parts, one of the two diversion cutting parts gradually extends from the inside of the hollow tube toward the direction of the air inlet, and the two diversion cutting parts One of the other tapers from the inside of the hollow tube toward the outlet. In this way, it has the effect of increasing the diversion effect and improving the smoothness of the air flow.

Wherein, each of the liquid flow channels and each of the gas flow channels are formed to cross. In this way, it has the effect of improving the overall efficiency of heat exchange.

Among them, each of the fins forms a wave shape. In this way, it has the effect of increasing the contact area of the air flow to improve the heat transfer performance.

Among them, the hollow tube body is made of multiple layers of heat storage materials. In this way, it has the effect of allowing the hollow tube body to absorb and store possible dissipated heat energy.

Wherein, the outer surfaces of the fins have a plurality of spaced apart attachment parts. In this way, it has the effect of increasing the contact area of the air flow to improve the heat transfer performance.

In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of preferred embodiments of the present invention, in conjunction with the attached drawings, as follows:

Please refer to FIG. 1, which is a preferred embodiment of the heat exchange device of the present invention, which includes a hollow tube body 1 and a heat conduction group 2. The heat conduction group 2 is located inside the hollow tube body 1.

The hollow tube body 1 may be a tube body of various shapes. In this embodiment, the hollow tube body 1 is a round tube. However, the hollow tube body 1 may also be a square tube or other various columns. The invention is not limited to this. The hollow tube body 1 has an air inlet 11 and an air outlet 12 opposite to each other. The air inlet 11 is for high temperature exhaust gas and the air outlet 12 is for low temperature exhaust gas.

In addition, the outer peripheral surface of the hollow tube body 1 has a liquid inlet 13 and a liquid outlet 14, the liquid inlet 13 and the liquid outlet 14 are located between the air inlet 11 and the air outlet 12, the liquid inlet The port 13 allows low-temperature liquid to enter, the liquid outlet 14 to discharge high-temperature liquid, and the liquid inlet 13 and the liquid outlet 14 communicate with the inside of the hollow tube 1.

Please refer to FIG. 2 and FIG. 3, in this embodiment, the hollow tube body 1 can optionally have a first flow guide channel 15 and a second flow guide channel 16, the first flow guide channel 15 communicates The liquid inlet 13 allows the liquid inlet 13 to communicate with the inside of the hollow tube body 1 through the first guide channel 15, and the second guide channel 16 communicates with the liquid outlet 14 to make the The liquid outlet 14 can communicate with the inside of the hollow tube 1 through the second flow guide channel 16. In particular, the hollow tube body 1 can be made of multiple layers of heat storage materials, such as glass fiber or alumina, so that the hollow tube body 1 can absorb and store thermal energy that may escape.

Please refer to FIG. 1 and FIG. 4, the heat conducting group 2 is located inside the hollow tube body 1, the heat conducting group 2 is connected to the inner wall surface of the hollow tube body 1, the heat conducting group 2 is compared with the hollow tube body 1 Preferably, it is made by integral molding, for example, it can be made by 3D printing technology, and the invention is not limited. The heat conduction group 2 has a plurality of heat medium plate members 2a and a plurality of fins 2b, the plurality of heat medium plate members 2a are respectively arranged in the axial direction, and are spaced apart from each other in the radial direction, the plurality of fins 2b It is located between the two adjacent heat medium plates 2a.

Please refer to FIG. 3 and FIG. 4, in detail, each of the heat medium plates 2a respectively has a plurality of liquid flow channels 21, and the plurality of liquid flow channels 21 may be arranged parallel to each other, and the plurality of liquid flow channels 21 One end communicates with the liquid inlet 13 so that the liquid inlet 13 can communicate with the plurality of liquid flow channels 21 through the first flow channel 15; the other end of the plurality of liquid flow channels 21 communicates with the liquid outlet 14 , So that the liquid outlet 14 can communicate with the plurality of liquid flow channels 21 through the second deflector channel 16, and the first deflector channel 15 and the second deflector channel 16 are preferably through the number The two liquid flow channels 21 are in communication. In particular, the outer surface of the heat medium plate 2a and the inner surfaces of the plurality of liquid flow channels 21 can be roughened. For example, acid etching can be used to make the inside of the plurality of liquid flow channels 21 The surface can be formed irregularly as shown in FIG. 6, and the invention is not limited thereto. Preferably, the roughness Ra of the outer surface of the heat medium plate 2a and the inner surfaces of the several liquid flow channels 21 is Ra<50um.

Please refer to FIG. 1 and FIG. 4, each of the heat medium plates 2 a may further have two opposite flow guiding cut parts 22, one of the two flow guiding cut parts 22 is directed from the inside of the hollow tube body 1 to the The direction of the air inlet 11 is tapered and extended, so that the high-temperature exhaust gas can enter the air inlet 11 smoothly, and the other one of the two deflectors 22 gradually goes from the inside of the hollow tube body 1 toward the direction of the air outlet 12 The contraction and extension makes the low-temperature exhaust gas smoother when discharged from the air outlet 12.

Please refer to Figures 2, 4, and 5, the plurality of fins 2b are located between the adjacent two heat medium plate members 2a, the plurality of fins 2b may be arranged parallel to each other, so that the adjacent A gas flow path 23 is formed between the two fins 2b. One end of the plurality of gas flow paths 23 communicates with the gas inlet 11, the other end of the plurality of gas flow paths 22 communicates with the gas outlet 12, and each of the liquid flow paths 21 is Each of the gas flow channels 23 is preferably formed in a cross configuration as shown in FIG. 2. In detail, each of the fins 2b has a plurality of concave portions 24 and a plurality of convex portions 25 connected to each of the fins 2b to form a non-straight shape, for example: each of the fins 2b can be selected The wave shape or the zigzag shape is formed. In this embodiment, each of the fins 2b is described as being formed in a wave shape. In another embodiment, the fin 2b may be selected as a "discontinuous surface".

Please refer to figures 4 and 5. In particular, the outer surface of the fins 2b can be roughened. For example, 3D printing can be used to make the outer surfaces of the fins 2b spaced apart as shown in FIG. 5 A plurality of attachment portions 26, the shape of the attachment portions 26 is based on the principle that the outer surfaces of the plurality of fins 2b can be formed with unevenness, the present invention is not limited, nor is the figure disclosed in this embodiment The formula is limited. Preferably, the roughness Ra of the outer surface of the fin 2b Ra<50um, so that when the airflow passes through each of the gas flow channels 23 between the two adjacent fins 2b, the contact area of the airflow can be increased, causing local acceleration of the gas velocity , And produce a significant local turbulence effect (increasing the disturbance of the air flow), so that the high-temperature gas entering the gas flow channel 23 can be more effectively conducted to the surface of the fin 2b, improving the heat transfer efficiency of the exhaust gas.

Please refer to Figures 3, 4, and 7, according to the foregoing structure, the heat exchange device of the present invention can be applied to the fields of food industry, pharmaceutical industry, cooling and heating air conditioning, petrochemical industry, etc. In this embodiment, it is To illustrate, a micro-turbine power generation device M in the electric power field can be provided on the side of the micro-turbine power generation device M. The high-temperature exhaust gas discharged from the micro-turbine power generation device M can be discharged from the hollow tube 1 Enters the gas inlet 11 and flows toward the gas outlet 12 through the gas channels 23 of the heat conduction group 2; in addition, the cold water to be heated can enter through the liquid inlet 13 and pass through the heat conduction group 2 Several liquid flow channels 21 flow toward the liquid outlet 14.

At this time, the cold water body and the high-temperature exhaust gas are respectively located in the liquid flow path 21 and the gas flow path 23, and the fins 2b can absorb the thermal energy of the high-temperature exhaust gas and transfer the thermal energy to the heat medium plates 2a, so that the cold water body flowing into the liquid passages 21 of the heat medium plate members 2a from the liquid inlet 13 is gradually heated into a hot water body, and flows out through the liquid outlet 14 and is stored in a The water storage tank H enables the hot water body in the water storage tank H to be used for other needs, for example, the toilet water for factory dormitories. After the water body in the water storage tank H is cooled, the water body can be pressurized by a pump P to flow into the liquid inlet 13 again, so that the water body can be circulated for heating, and the high-temperature exhaust gas is cooled to form a low-temperature exhaust gas. The low-temperature exhaust gas can be discharged through the air outlet 12.

In addition, since the outer surface of the heat medium plate 2a and the inner surfaces of the plurality of liquid flow channels 21 can be roughened to form irregular shapes, and each of the fins 2b is formed into a wave shape, and each The outer surface of the fin 2b is roughened to form an uneven surface, whereby the contact area of the air flow and the water body can be increased separately to improve the heat transfer performance, so that the high-temperature exhaust gas does not need to stay in each gas The time of the flow channel 23 is too long, in addition to preventing the high temperature exhaust gas from entering the hollow tube body 1 to form a blockage, the temperature of the water body after being heated can be further increased.

In summary, the heat exchange device of the present invention utilizes the concave portions and convex portions of each fin, and the outer surface of each fin has a roughness, which can increase the contact area of the high-temperature exhaust gas to make the high temperature The exhaust gas does not need to stay in each of the gas flow channels for too long, which can improve the heat transfer performance to avoid the formation of blockage when the high-temperature exhaust gas enters the hollow pipe body, thereby having the effect of improving the overall heat exchange efficiency.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this art without departing from the spirit and scope of the present invention still makes various changes and modifications to the above-mentioned embodiments. The technical scope of the invention is protected, so the scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

﹝this invention﹞ 1: Hollow tube 11: Air inlet 12: Outlet 13: Liquid inlet 14: Outlet 15: The first diversion channel 16: Second diversion channel 2: heat conduction group 2a: Heat medium plate 2b: fins 21: Liquid flow path 22: Diversion and cutting section 23: gas flow path 24: recess 25: convex part 26: Attachment H: water storage tank M: Microturbine power plant P: Pump

[Figure 1] A perspective view of a preferred embodiment of the present invention. [Figure 2] A cross-sectional view along line A-A in Figure 1. [Figure 3] Sectional view taken along line B-B of Figure 2. [Figure 4] A partial enlarged view of a heat conduction group according to a preferred embodiment of the present invention. [Figure 5] A partially enlarged view of C as shown in Figure 2. [Figure 6] A partially enlarged view of D as shown in Figure 3. [Figure 7] A flow chart of a preferred embodiment of the present invention in practical application.

1: Hollow tube

11: Air inlet

12: Outlet

13: Liquid inlet

14: Outlet

15: The first diversion channel

2: heat conduction group

2a: Heat medium plate

2b: fins

21: Liquid flow path

22: Diversion and cutting section

23: gas flow path

Claims (11)

A heat exchange device includes: a hollow tube body having an air inlet and an air outlet opposite to each other, a liquid inlet and a liquid outlet between the air inlet and the air outlet; and a heat conduction group, located in In the hollow tube body, the heat conduction group has a plurality of heat medium plates and a plurality of fins, and a plurality of liquid flow channels of each heat medium plate connect the liquid inlet and the liquid outlet, and the plurality of fins Located between the two adjacent heat medium plates, each of the fins has a plurality of concave portions and a plurality of convex portions connected to each other, and the outer surface of each of the fins has roughness, the adjacent two fins A gas flow channel is formed between the gas flow channels, and the gas flow channels communicate with the gas inlet and the gas outlet. The heat exchange device as described in item 1 of the patent application scope, wherein the hollow tube body has a first guide channel and a second guide channel, the first guide channel communicates with the liquid inlet, the first The two flow guiding channels communicate with the liquid outlet, and the first flow guiding channel and the second flow guiding channel communicate with each other through the plurality of liquid flow channels. The heat exchange device as described in item 1 of the patent application scope, wherein the heat conduction group and the hollow tube body are made by integral molding. The heat exchange device as described in item 3 of the patent application scope, wherein the heat conduction group and the hollow tube system are made by 3D printing technology. The heat exchange device as described in item 1 of the patent application scope, wherein the outer surface of the heat medium plate and the inner surfaces of the several liquid flow channels have roughness. The heat exchange device as described in item 1 or 5 of the patent application, wherein the roughness Ra<50um. The heat exchange device as described in item 1 of the patent application scope, wherein each of the heat medium plates has two opposite deflectors, one of the two deflectors goes from the inside of the hollow tube toward the The direction of the air inlet is gradually extended, and the other one of the two diversion and cutting parts is gradually extended from the inside of the hollow tube toward the direction of the air outlet. The heat exchange device as described in item 1 of the scope of the patent application, wherein each of the liquid flow paths and each of the gas flow paths form a cross. The heat exchange device as described in item 1 of the patent application, wherein each of the fins is formed into a wave shape. The heat exchange device as described in item 1 of the patent application scope, wherein the hollow tube body is made of multiple layers of heat storage materials. The heat exchange device as described in item 1 of the patent application range, wherein the outer surfaces of the fins have a plurality of spaced apart attachment portions.

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