1. The utility model provides a shell and tube heat exchanger, includes casing, many heat exchange tubes, first medium import and first medium export, the heat exchange tube is located in the casing, the both ends of heat exchange tube are followed wear out in the casing, just the heat exchange tube with casing sealing connection, its characterized in that: the heat exchange tube is characterized in that a flow equalizing plate is further arranged in the shell, a first cavity and a second cavity are separated from the flow equalizing plate in the shell, a plurality of through holes are formed in the flow equalizing plate, each heat exchange tube correspondingly penetrates through each through hole, a gap is formed between the inner wall of each through hole and the outer wall of each heat exchange tube, the first cavity is communicated with the second cavity through the gap, the first medium inlet is communicated with the first cavity, and the first medium outlet is communicated with the second cavity.

2. The shell and tube heat exchanger of claim 1 wherein: the first cavity or still be provided with many flow equalizing pipes in the second cavity, every flow equalizing pipe overlaps respectively and establishes every outside the heat exchange tube, the one end of flow equalizing pipe with flow equalizing plate fixed connection, the through-hole with flow equalizing pipe is linked together, and the other end is the free end, just the internal diameter of flow equalizing pipe is greater than the external diameter of heat exchange tube.

3. The shell and tube heat exchanger of claim 2 wherein: the distance between the inner wall of the flow equalizing pipe and the outer wall of the heat exchange pipe and/or the gap distance between the inner wall of the through hole and the outer wall of the heat exchange pipe is 0.5-2.0 MM.

4. The shell and tube heat exchanger of claim 3 wherein: the volume ratio of the first chamber to the second chamber is 1: 4-1: and 8, respectively.

5. The shell and tube heat exchanger of claim 4 wherein: the flow equalizing pipe is positioned in the second chamber, and the length ratio of the flow equalizing pipe to the second chamber is 0.2-0.5.

6. The shell and tube heat exchanger of claim 1 wherein: a first seal head and a second seal head are respectively arranged at two ends of the shell, a second medium inlet is arranged on the first seal head, and a second medium outlet is arranged on the second seal head;

the first end socket and the second end socket cover the two ends of the heat exchange tube respectively, and the first end socket and the second end socket are connected with the shell in a sealing mode.

7. The shell and tube heat exchanger according to any one of claims 1-6, wherein: fins are arranged on the outer wall of the heat exchange tube along the length direction of the heat exchange tube, the fins are fixedly connected with the heat exchange tube, and gaps are formed between the edges of the fins and the inner wall of the through hole and/or the flow equalizing tube.

8. The shell and tube heat exchanger according to any one of claims 1-6, wherein: the heat exchange tube is provided with a groove along the length direction.

9. The shell and tube heat exchanger of claim 8 wherein: a plurality of fins are arranged in the groove and fixedly connected with the heat exchange tube.

10. The shell and tube heat exchanger according to any one of claim 9, wherein: the edge of the fin is not higher than the chord surface of the heat exchange tube.

Background

A heat exchanger, also called a heat exchanger, is a device that transfers heat between two or more media at different temperatures. The heat exchanger plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, and can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like. Such as those known in the art, the evaporator and condenser of the indoor unit and the outdoor unit are one of the heat exchangers. For another example, the shell-and-tube heat exchanger is also called a shell-and-tube heat exchanger, because of its advantages of simple structure and high pressure bearing, it is widely used in central air conditioner, heat pump hot water unit, industrial water chiller, ground source or water source hot water unit. However, the heat exchanger in the prior art has the problem of low heat exchange efficiency in use, and particularly has the problem of more obvious heat exchange efficiency when being applied to the central air conditioner, the hot water unit and the cold water unit with high refrigerating capacity or high heating capacity. Particularly, because the speed that the refrigerant flowed into the outflow heat exchanger is comparatively fast, and the heat exchange tube in the heat exchanger has many, when the refrigerant flowed into in the heat exchanger, under factors such as gravity and velocity of flow, the heat exchange tube that is close to the heat exchanger entrance can be formed abundant parcel by the refrigerant and then with the medium in the heat exchange tube, if water forms abundant heat transfer, and the heat exchange tube of keeping away from the heat exchanger entrance then can not be formed abundant parcel by the refrigerant, and then reduced the heat exchange efficiency of heat exchanger.

Disclosure of Invention

In view of this, the present invention aims to provide a shell-and-tube heat exchanger with reasonable structure and high heat exchange efficiency.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a shell-and-tube heat exchanger comprises a shell, a plurality of heat exchange tubes, a first medium inlet and a first medium outlet, the heat exchange tube is positioned in the shell, two ends of the heat exchange tube penetrate out of the shell, the heat exchange tube is hermetically connected with the shell, a flow equalizing plate is also arranged in the shell, the edge of the flow equalizing plate is tightly contacted or hermetically connected with the inner wall of the shell, the flow equalizing plate is divided into a first chamber and a second chamber in the shell, a plurality of through holes are formed in the flow equalizing plate, each heat exchange tube penetrates through each through hole, a gap is formed between the inner wall of the through hole and the outer wall of the heat exchange tube, the first chamber and the second chamber are communicated through the gap, the first medium inlet communicates with the first chamber and the first medium outlet communicates with the second chamber.

As a further improvement of the shell-and-tube heat exchanger, a plurality of flow equalizing pipes are further arranged in the first cavity or the second cavity, each flow equalizing pipe is sleeved outside each heat exchange pipe, one end of each flow equalizing pipe is fixedly connected with the flow equalizing plate, the through hole is communicated with the flow equalizing pipe, the other end of each flow equalizing pipe is a free end, and the inner diameter of each flow equalizing pipe is larger than the outer diameter of each heat exchange pipe.

As a further improvement of the shell-and-tube heat exchanger, the distance between the inner wall of the flow equalizing pipe and the outer wall of the heat exchange pipe and/or the gap distance between the inner wall of the through hole and the outer wall of the heat exchange pipe is 0.5-2.0 MM.

As a further improvement to the shell and tube heat exchanger, the first and second chambers have a volume ratio of 1: 4-1: and 8, respectively.

As a further improvement of the shell-and-tube heat exchanger, the flow equalizing pipe is positioned in the second cavity, and the length ratio of the flow equalizing pipe to the second cavity is 0.2-0.5.

As a further improvement of the shell-and-tube heat exchanger, a first end enclosure and a second end enclosure are respectively arranged at two ends of the shell, a second medium inlet is arranged on the first end enclosure, and a second medium outlet is arranged on the second end enclosure;

the first end socket and the second end socket cover the two ends of the heat exchange tube respectively, and the first end socket and the second end socket are connected with the shell in a sealing mode.

As a further improvement of the shell-and-tube heat exchanger, fins are arranged on the outer wall of the heat exchange tube along the length direction of the heat exchange tube, the fins are fixedly connected with the heat exchange tube, and gaps are formed between the edges of the fins and the inner walls of the through holes and/or the flow equalizing tubes.

As a further improvement of the shell and tube heat exchanger, the heat exchange tube is provided with a groove along the length direction thereof.

As a further improvement of the shell-and-tube heat exchanger, a plurality of fins are arranged in the groove and fixedly connected with the heat exchange tube.

As a further improvement of the shell-and-tube heat exchanger, the edges of the fins are not higher than the chord surface of the heat exchange tube.

The technical effects generated by the invention are mainly reflected in that: through set up the flow equalizing plate in the casing, set up the through-hole of mutually supporting with the heat exchange tube on the flow equalizing plate, and be formed with the clearance between the outer wall of through-hole and heat exchange tube, thereby make the first medium (refrigerant) that flows into in the first cavity, can flow into in the second cavity along the clearance, promptly, the flow equalizing plate shunts the first medium that gets into the second cavity by first cavity, receive the restriction in clearance between through-hole and the heat exchange tube, can be so that flow through the even parcel heat exchange tube of first medium, and then make the second medium (water) that flows through the heat exchange tube can carry out abundant heat transfer with first medium, further heat exchange efficiency who has just also improved the heat exchanger.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic view of the overall structure of a shell-and-tube heat exchanger according to the present invention;

FIG. 2 is an exploded view of a shell and tube heat exchanger according to the present invention;

FIG. 3 is a schematic structural view of a shell-and-tube heat exchanger according to the present invention with the shell removed;

FIG. 4 is a schematic view of a connection structure of a flow equalizing plate and a flow equalizing pipe of a shell-and-tube heat exchanger according to the present invention;

fig. 5 is a schematic top view of a flow equalizing plate of a shell-and-tube heat exchanger according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and specific examples so that those skilled in the art can better understand the present invention and can implement the present invention, but the examples are not intended to limit the present invention, and in the present examples, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like as used herein are for illustrative purposes only.

As shown in fig. 1 to 5, an embodiment of the present invention provides a shell-and-tube heat exchanger, including a shell 1, a plurality of heat exchange tubes 2, a first medium inlet 11 and a first medium outlet 12, where the heat exchange tubes 2 are located in the shell 1, two ends of each heat exchange tube 2 respectively penetrate through the shell 1 from two ends in the shell 1, the heat exchange tubes 2 and the shell 1 are welded to form a seal, the shell 1 is further provided with a flow equalizing plate 3, an edge of the flow equalizing plate 3 is in close contact with an inner wall of the shell 1 or an edge of the flow equalizing plate 3 and the shell 1 are welded to form a seal, the flow equalizing plate 3 separates a first chamber 13 and a second chamber 14 in the shell 1, the flow equalizing plate 3 is provided with a plurality of through holes 31, the number of the through holes 31 is the same as that of the heat exchange tubes 2, and each heat exchange tube 2 respectively corresponds to and penetrates through each through hole 31; a gap 4 or a flow channel is formed between the inner wall of the through hole 31 and the outer wall of the heat exchange tube 2, so that the first chamber 13 and the second chamber 14 are communicated through the gap 4; further, the first medium inlet 11 communicates with the first chamber 13, and the first medium outlet 12 communicates with the second chamber 14. When the heat exchanger is used, a first medium enters the first chamber 13 through the first medium inlet 11, and the first medium in the first chamber 13 is blocked by the flow equalizing plate 3, so that only the first medium can flow into the second chamber 14 only along the gap 4 between the through hole 31 and the heat exchange tube 2 or what is called a flow channel, that is, the flow equalizing plate 3 limits and/or shunts the first medium entering the second chamber 14 from the first chamber 13, and is limited by the gap 4 between the through hole 31 and the heat exchange tube 2, so that the heat exchange tube 2 can be uniformly wrapped by the first medium, and further, a second medium (water) flowing through the heat exchange tube 2 can fully exchange heat with the first medium, and the heat exchange efficiency of the heat exchanger is further improved.

As shown in fig. 1 to 5, in a preferred embodiment, a plurality of flow equalizing pipes 5 are further disposed in the first chamber 13 or the second chamber 14, the flow equalizing pipes 5 in this embodiment are disposed in the second chamber 14, each flow equalizing pipe 5 is correspondingly sleeved outside each heat exchanging pipe 2, one end of each flow equalizing pipe 5 is welded and fixed to the flow equalizing plate 3, the other end of each flow equalizing pipe is a free end, the inner diameter of each flow equalizing pipe 5 is larger than the outer diameter of the heat exchanging pipe 2, and the through holes 31 are communicated with the flow equalizing pipes 5. The first medium flowing through the through hole 31 can be further constrained by the flow equalizing pipe 5, so that the heat exchange pipe 2 can be wrapped by the first medium flowing through the flow equalizing pipe 5 more uniformly, and the first medium can form sufficient heat exchange with the second medium in the heat exchange pipe 2. Further, the distance between the inner wall of the flow equalizing pipe 5 and the outer wall of the heat exchange pipe 2 and/or the distance between the inner wall of the through hole 31 and the outer wall of the heat exchange pipe 2 is 0.5 MM to 2.0MM, for example, 0.6 MM, 0.7 MM, 0.8 MM, 0.9 MM, 1.0 MM, 1.2 MM, 1.5 MM, 1.7 MM, and in a corresponding range of values, the distance between the inner wall of the flow equalizing pipe 5 and the outer wall of the heat exchange pipe 2 and/or the distance between the inner wall of the through hole 31 and the outer wall of the heat exchange pipe 2 can be flexibly selected according to heat exchangers with different heat exchange amounts or manufacturing amounts or different use requirements. Further, the volume ratio of the first chamber 13 to the second chamber 14 is 1: 4-1: 8, or more; similarly, the volume ratio of the first chamber 13 and the second chamber 14 can be flexibly selected according to the heat exchangers with different heat exchange amounts or command amounts or different use requirements. The flow equalizing pipe 5 is positioned in the second chamber 14, and the length ratio of the flow equalizing pipe 5 to the second chamber 14 is 0.2-0.5, such as 0.3 and 0.4, the length ratio of the flow equalizing pipe 5 to the second chamber 14 can be flexibly selected according to heat exchangers with different heat exchange amounts or different manufacturing amounts or different use requirements, and specifically, when the shell 1 of the heat exchanger is in a vertical state, the first chamber 13 is positioned above the second chamber 14, and when a first medium (refrigerant) enters the shell 1 under the driving of a compressor, the first medium (refrigerant) exists in a gas-liquid mixed state, namely, the liquid refrigerant is gathered at the bottom of the second chamber 13 under the action of gravity, and the liquid refrigerant uniformly wraps the contact part of the liquid refrigerant and the heat exchange tube 2, therefore, the part of the heat exchange tube 2 does not need to use the flow equalizing tube 5, thereby achieving the purposes of saving materials and manufacturing cost; the flow equalizing pipe 5 is used for restraining gaseous refrigerants, so that the heat exchange pipe 2 can be uniformly wrapped when the gaseous refrigerants pass through the flow equalizing pipe 5, and then the refrigerant and the heat exchange pipe 2 can be subjected to sufficient heat exchange.

As shown in fig. 1-2, in a preferred embodiment, a first sealing head 6 and a second sealing head 7 are further respectively disposed at two ends of the housing 1, the first sealing head 6 is provided with a second medium inlet 61, and the second sealing head 7 is provided with a second medium outlet 71; the first end socket 6 and the second end socket 7 are respectively covered at two ends of the heat exchange tube 2, the first end socket 6 and the second end socket 7 are in sealing connection with the shell 1 through welding or bolts, a second medium is divided when entering the first end socket, and flows together when entering the second end socket 7 through the heat exchange tube 2, and finally flows out from the second medium outlet 71.

In a preferred embodiment, fins (not shown) are arranged on the outer wall of the heat exchange tube 2 along the length direction of the heat exchange tube, the fins are fixedly connected with the heat exchange tube 2, and gaps 4 or flow channels are formed between the edges of the fins and the inner wall of the through hole 31 and/or the flow equalizing tube 5; further, in another embodiment, the heat exchange tube 2 is provided with a groove (not shown) along the length direction thereof, and the groove may be a spiral groove or a linear groove, and similarly, the surface area of the heat exchange tube 2 can be increased by the groove; further, in another embodiment, the heat exchange tube 2 is provided with a groove (not shown) along the length direction thereof, and a plurality of fins (not shown) are arranged in the groove, and the fins are fixedly connected with the heat exchange tube 2, and the edges of the fins are not higher than the chord surface of the heat exchange tube 2. The grooves and the fins are arranged, and the grooves and the fins are matched with each other, so that the surface area of the heat exchange tube 2 can be effectively increased, the contact area with a first medium (refrigerant) is increased, and the heat exchange efficiency of the heat exchanger is further increased.

The technical effects generated by the invention are mainly reflected in that: through set up the flow equalizing plate in the casing, set up the through-hole of mutually supporting with the heat exchange tube on the flow equalizing plate, and be formed with the clearance between the outer wall of through-hole and heat exchange tube, thereby make the first medium (refrigerant) that flows into in the first cavity, can flow into in the second cavity along the clearance, promptly, the flow equalizing plate shunts the first medium that gets into the second cavity by first cavity, receive the restriction in clearance between through-hole and the heat exchange tube, can be so that flow through the even parcel heat exchange tube of first medium, and then make the second medium (water) that flows through the heat exchange tube can carry out abundant heat transfer with first medium, further heat exchange efficiency who has just also improved the heat exchanger.

In this specification, unless explicitly stated or limited otherwise, a first feature may be "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, reference to the description of the term "preferred embodiment," "another embodiment," "other embodiments," or "specific examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.