Aluminum plate fin type refrigeration dryer heat exchanger

Abstract

The utility model discloses an aluminum plate fin type refrigeration dryer heat exchanger which comprises a compressed gas inlet, a compressed gas outlet, a heat exchange core body and a separation core body. The heat exchange core body comprises a plurality of inner core body units and a plurality of outer core body units, the inner core body units and the outer core body units are alternately arranged in the thickness direction, a plurality of first flow channels which are evenly distributed and third flow channels which are located at the bottoms of the first flow channels and spaced from the first flow channels are arranged in the inner core body units, and the first flow channels are communicated with the third flow channels. One end of the first flow channel is connected with the compressed gas inlet and is used for inputting compressed gas, a plurality of second flow channels which are uniformly distributed are arranged in the outer core body unit, one end of each second flow channel is connected with a plurality of separation units arranged on the separation core body, and the separation core body is communicated with the first flow channel and the second flow channels; high-pressure gas input along the first flow channel is cooled by a coolant in the second flow channel, liquid is separated in the separation unit, and then the high-pressure gas is output from the compressed gas outlet through the second flow channel.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to an aluminum plate-fin type cold dryer heat exchanger. Background Art

[0002] The principle of the cold dryer is to exchange heat between compressed air and Freon refrigerant, reduce the temperature of the compressed air while keeping the pressure constant, separate the liquid water in the gas-liquid separator to obtain dry compressed air, and then raise the temperature of the compressed air to a temperature close to that when it enters the cold dryer.

[0003] At present, the more common method is to use a plate heat exchanger or a plate and shell heat exchanger in combination with a gas-liquid separator, which has a complex structure, occupies a large space, and the heat exchange efficiency has always been at a low level.

[0004] Therefore, there is still a need for an aluminum plate-fin cold dryer heat exchanger to solve the above problems. Utility Model Content

[0005] The utility model provides an aluminum plate-fin type cold and dry machine heat exchanger which solves the above problems.

[0006] The purpose of the utility model is achieved by the following technical solutions:

[0007] An aluminum plate-fin type cold dryer heat exchanger, comprising:

[0008] Compressed gas inlet, compressed gas outlet;

[0009] A heat exchange core, the heat exchange core comprising a plurality of inner core units and a plurality of outer core units, the inner core units and the outer core units are alternately arranged in the thickness direction, the inner core units are provided with a plurality of evenly distributed first flow channels and a third flow channel located at the bottom of the first flow channel and spaced from the first flow channel, one end of the first flow channel is connected to the compressed gas inlet for inputting the compressed gas, the outer core units are provided with a plurality of evenly distributed second flow channels, one end of the second flow channel is connected;

[0010] A separation core is provided with a plurality of separation units, the separation core is connected with a first flow channel and a second flow channel, the high-pressure gas input along the first flow channel is cooled by the coolant in the second flow channel, the liquid is separated in the separation unit, and then output from the compressed gas outlet through the second flow channel.

[0011] In one embodiment, the inner core unit is divided into a refrigeration zone and a heat recovery zone, a partition bar is provided between the refrigeration zone and the heat recovery zone, the flow channel is located in the heat recovery zone, and the third flow channel is located in the refrigeration zone.

[0012] In one embodiment, on an adjacent inner core unit and an outer core unit, the flow direction of the high-pressure gas on at least part of the first flow channel is opposite to the flow direction of the high-pressure gas on the second flow channel, and the adjacent inner core units and outer core units are welded.

[0013] In one embodiment, the separation unit is provided with a plurality of separation parts evenly spaced apart.

[0014] In one embodiment, the separation unit is a metal plate, the separation part is integrally formed on the metal plate, and a plurality of the separation units are stacked and arranged.

[0015] In one embodiment, the plurality of separation parts are divided into a plurality of first arrangement groups and second arrangement groups which are alternately arranged on the separation unit, and the gap between the separation parts in the first arrangement group and the separation parts in the second arrangement group is 0.6 mm.

[0016] In one embodiment, a drain port is provided at the bottom of the separation core.

[0017] Compared with the prior art, the beneficial effects of the present invention include at least:

[0018] The heat exchange core is provided with a plurality of inner cores and outer cores arranged alternately in the thickness direction, and a separation core connecting the outer core and the inner core. The integrated design does not require pipelines to connect the separate heat exchange core and the separation core, thereby simplifying the structure and occupying space. The pressurized high-temperature and high-pressure gas enters the heat exchange core through the first flow channel and cools down after heat exchange with the coolant on the third flow channel, and then separates the liquid on the separation core. Then, the low-temperature gas after liquefaction separation flows out from the second channel of the interval. The high-temperature gas that enters through the first flow channel again is first cooled by the low-temperature gas in the second flow channel of the interval for preliminary cooling. Then, the high-temperature and high-pressure gas in the first flow channel after the preliminary cooling flows to the bottom and cools down again by heat exchange with the third flow channel below, and the liquid is separated in the separation core to achieve a drying effect. Then, the dried low-temperature and high-pressure gas flows back through the second channel and exchanges heat with the high-temperature and high-pressure gas in the first channel to increase the temperature of the separated gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a cold and dry machine heat exchanger according to an embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of a heat exchange core of a cold dryer heat exchanger according to an embodiment of the utility model from a side perspective;

[0021] Figure 3 This is a schematic structural diagram of the heat exchange core of the cold and dry machine heat exchanger according to an embodiment of the utility model from another side;

[0022] Figure 4 It is a structural schematic diagram of the heat exchange core of the cold dryer heat exchanger of the embodiment of the utility model without the separation core shell;

[0023] Figure 5 It is a structural schematic diagram of a separation unit of an embodiment of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the outer core unit of an embodiment of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the inner core unit of an embodiment of the utility model.

[0026] In the figure: 1. compressed gas inlet; 2. compressed gas outlet; 3. heat exchange core; 31. inner core unit; 311. first flow channel; 312. third flow channel; 32. outer core unit; 321. second flow channel; 4. separation core; 41. separation unit; 411. separation part; 5. drain port; 6. separator. DETAILED DESCRIPTION

[0027] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete and to fully convey the concepts of example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0028] The words expressing positions and directions described in the present utility model are all explained by taking the drawings as examples, but they can be changed as needed, and all the changes are included in the protection scope of the present utility model.

[0029] Reference Figure 1-7 The utility model provides an aluminum plate-fin type cold dryer heat exchanger, comprising: a compressed gas inlet 1, a compressed gas outlet 2, a heat exchange core 3 and a separation core 4.

[0030] The heat exchange core 3 includes a plurality of inner core units 31 and a plurality of outer core units 32, and the inner core units 31 and the outer core units 32 are alternately arranged in the thickness direction. The inner core unit 31 is provided with a plurality of evenly distributed first flow channels 311 and a third flow channel 312 located at the bottom of the first flow channel 311 and spaced from the first flow channel 311. One end of the first flow channel 311 is connected to the compressed gas inlet 1 for inputting compressed gas. The outer core unit 32 is provided with a plurality of evenly distributed second flow channels 321, and one end of the second flow channel 321 is connected.

[0031] Reference Figure 5 and Figure 6 After being pressurized, the high-temperature and high-pressure gas enters the heat exchange core 3 through the first flow channel 311 and cools down after heat exchange with the coolant on the third flow channel 312, and then separates the liquid on the separation core 4. Then, the low-temperature gas after liquefaction separation flows out from the second channel of the interval. The high-temperature gas that enters through the first flow channel 311 again is first cooled by the low-temperature gas in the interval second flow channel 321. After the high-temperature and high-pressure gas in the first flow channel 311 after the initial cooling, it flows to the bottom and cools down again through heat exchange with the third flow channel 312 below, and separates the liquid in the separation core 4 to achieve the drying effect. Then, the low-temperature and high-pressure gas after drying flows back through the second channel and exchanges heat with the high-temperature and high-pressure gas in the first channel to increase the temperature of the separated gas.

[0032] The gas flows in the first flow channel 311 and the second flow channel 321 in opposite directions. The heat exchange core 3 composed of multiple inner core and outer core units 32 exchanges heat in a countercurrent manner, which has a high heat exchange efficiency. The connection at the edge of each layer of flow channel is brazed to connect the cores together.

[0033] A plurality of separation units 41 are arranged on the separation core 4, and the separation core 4 connects the first flow channel 311 and the second flow channel 321. The high-pressure gas input along the first flow channel 311 is cooled by the coolant in the second flow channel 321, and the liquid is separated in the separation unit 41, and then output from the compressed gas outlet 2 through the second flow channel 321.

[0034] In one embodiment, referring to Figure 6 As shown, the inner core unit 31 is divided into a refrigeration zone and a heat recovery zone, a dividing strip 6 is provided between the refrigeration zone and the heat recovery zone, the flow channel is located in the heat recovery zone, and the third flow channel 312 is located in the refrigeration zone. A plurality of third flow channels 312 are formed in the refrigeration zone, wherein the third flow channel 312 is, for example, a C-shaped flow channel, and the gas in the third flow channel 312 first moves horizontally from one end to the other end, then moves in the vertical direction, and finally moves horizontally from one end to the other end. The first flow channel 311 is, for example, a Z-shaped flow channel, and the second flow channel 321 is, for example, an L-shaped flow channel. The gas flow direction of the gas in the first flow channel 311 and the second flow channel 321 refers to the flow direction of the third flow channel 312.

[0035] In a specific embodiment, on an adjacent inner core unit 31 and an outer core unit 32, the flow direction of the high-pressure gas on at least part of the first flow channel 311 is opposite to the flow direction of the high-pressure gas on the second flow channel 321, and the adjacent inner core units 31 and outer core units 32 are welded. The airflow directions in the first flow channel 311 and the second flow channel 321 are opposite, which can improve the heat exchange efficiency of the gas.

[0036] More specifically, the separation unit 41 is provided with a plurality of evenly spaced separation parts 411. After the gas is rapidly cooled, small droplets will be condensed in the airflow, and the liquid can be quickly precipitated out under the blocking of the separation parts 411, and the separation parts 411 can evenly distribute the input airflow, so that the liquid in the airflow can be fully precipitated, thereby achieving the purpose of drying.

[0037] In one embodiment, referring to Figure 4 As shown, the separation unit 41 is a metal plate, the separation portion 411 is integrally formed on the metal plate, and a plurality of the separation units 41 are stacked and arranged. During processing, for example, a plurality of separation portions 411 are formed by stamping on the metal plate. The integrated design simplifies the structure and assembly steps of the separation unit 41 and improves reliability.

[0038] In another embodiment, the plurality of separation parts 411 are divided into a plurality of first arrangement groups and second arrangement groups that are alternately arranged on the separation unit 41, and the gap between the separation parts 411 in the first arrangement group and the separation parts 411 in the second arrangement group is at least 0.6 mm. According to experimental verification, the gap of the separation parts 411 within this size range can reduce the pressure drop while ensuring the stable precipitation of the liquid.

[0039] Reference Figure 2 As shown, a drain port 5 is provided at the bottom of the separation core 4. The drain port 5 can effectively separate the precipitated liquid and collect and process it uniformly.

[0040] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the utility model. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the utility model without departing from the principles and purpose of the utility model. All of these changes should fall within the scope of protection of the claims of the utility model.

Claims

1. An aluminum plate-fin type cold dryer heat exchanger, characterized in that: include: Compressed gas inlet, compressed gas outlet; A heat exchange core, the heat exchange core comprising a plurality of inner core units and a plurality of outer core units, the inner core units and the outer core units are alternately arranged in the thickness direction, the inner core units are provided with a plurality of evenly distributed first flow channels, and a third flow channel located at the bottom of the first flow channel and spaced from the first flow channel, one end of the first flow channel is connected to the compressed gas inlet for inputting the compressed gas, the outer core units are provided with a plurality of evenly distributed second flow channels, one end of the second flow channel is connected; A separation core is provided with a plurality of separation units, the separation core is connected with a first flow channel and a second flow channel, the high-pressure gas input along the first flow channel is cooled by the coolant in the second flow channel, the liquid is separated in the separation unit, and then output from the compressed gas outlet through the second flow channel.

2. The heat exchanger for a cold dryer according to claim 1, characterized in that: The inner core unit is divided into a refrigeration zone and a heat recovery zone, a dividing strip is provided between the refrigeration zone and the heat recovery zone, the flow channel is located in the heat recovery zone, the third flow channel is located in the refrigeration zone, and the first flow channel is located in the heat recovery zone.

3. The heat exchanger for a cold dryer according to claim 2, characterized in that: On an adjacent inner core unit and an outer core unit, the flow direction of the high-pressure gas on at least part of the first flow channel is opposite to the flow direction of the high-pressure gas on the second flow channel, and the adjacent inner core units and outer core units are welded.

4. The heat exchanger for a cold dryer according to claim 1, characterized in that: The separation unit is provided with a plurality of separation parts which are evenly spaced.

5. The heat exchanger for a cold dryer according to claim 4, characterized in that: The separation unit is a metal plate, the separation part is integrally formed on the metal plate, and a plurality of the separation units are stacked and arranged.

6. The heat exchanger for a cold dryer according to claim 5, characterized in that: The plurality of separation parts are divided into a plurality of first arrangement groups and second arrangement groups which are alternately arranged on the separation unit, and the gap between the separation parts in the first arrangement group and the separation parts in the second arrangement group is at least 0.6 mm.

7. The heat exchanger for a cold dryer according to claim 1, characterized in that: The bottom of the separation core is provided with a drain port.

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