A three-in-one plate heat exchanger for cold and dry machine

Abstract

The present invention provides a three-in-one plate heat exchanger for a cold dryer, belonging to the technical field of heat exchangers. It solves the problem of the complex structure of the existing heat exchanger for drying. The three-in-one plate heat exchanger for a cold dryer includes a precooling heat exchanger, an intermediate separator and a cooling heat exchanger. The intermediate separator is sandwiched between the precooling heat exchanger and the cooling heat exchanger, and the intermediate separator includes a connecting chamber and a separating chamber that are independent of each other. The connecting chamber is connected to the hot and humid air outlet and the hot and humid air cooling inlet, and the separating chamber is connected to the cold and humid air outlet and the cold and dry air inlet. A plurality of partitions are arranged in the separating chamber, and a filter mesh block is arranged between at least two partitions. The precooling heat exchanger, the intermediate separator and the cooling heat exchanger are stacked in sequence by brazing to form an integrated structure, which has a more compact structure and a good drying effect.

Description

Technical Field

[0001] The invention belongs to the technical field of heat exchangers and relates to a plate heat exchanger, in particular to a three-in-one plate heat exchanger for a cold and dry machine. Background Art

[0002] Before using compressed air, it must be dried and purified. Usually, drying can be achieved by cooling, so that the water vapor in the air reaches the dew point temperature and condenses into water droplets. At the same time, other condensable pollutants in the air are removed together. After that, the low-temperature air needs to be heated again to avoid condensation on the outside of the air pipeline during transportation, and ice due to instantaneous expansion and rapid temperature drop during use. Therefore, it is very necessary to dehumidify and purify the compressed air. Existing air drying heat exchangers such as Figure 1 As shown, after the high-pressure air comes out of the cooling port, an air-water separator is externally connected to separate water and condensable pollutants, which causes space waste and cumbersome installation and construction, and also leads to increased costs. Summary of the invention

[0003] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a three-in-one plate heat exchanger for a cold dryer. The technical problem it aims to solve is how to dry the hot and humid air while making the structure of the heat exchanger more compact to avoid space waste.

[0004] The object of the present invention can be achieved through the following technical solutions: a three-in-one plate heat exchanger for a cold and dry machine, comprising a pre-cooling heat exchanger, an intermediate separator and a cooling heat exchanger, characterized in that the pre-cooling heat exchanger is provided with a hot and humid air inlet, a hot and humid air outlet, a hot and humid air flow channel, a cold and dry air inlet, a dry air outlet and a dry air flow channel, the hot and humid air inlet and the hot and humid air outlet are connected through the hot and humid air flow channel, the cold and dry air inlet and the dry air outlet are connected through the dry air flow channel, and heat exchange is carried out between the hot and humid air flow channel and the dry air flow channel, the cooling heat exchanger is provided with a hot and humid air cooling inlet, a cold ... An air outlet, a refrigerant inlet and a refrigerant outlet, the refrigerant inlet and the refrigerant outlet are connected via a refrigerant channel, the hot and humid air cooling inlet and the cold and humid air outlet are connected via a refrigeration channel, and there is heat exchange between the refrigerant channel and the refrigeration channel, the intermediate separator is sandwiched between the pre-cooling heat exchanger and the cooling heat exchanger, and the intermediate separator includes a connecting chamber and a separation chamber that are independent of each other, the connecting chamber is connected to the hot and humid air outlet and the hot and humid air cooling inlet, the separation chamber is connected to the cold and humid air outlet and the cold and dry air inlet, a plurality of partitions are arranged in the separation chamber, and a filter mesh block is arranged between at least two partitions.

[0005] In the above-mentioned three-in-one plate heat exchanger of the cold and dry machine, the pre-cooling heat exchanger includes a front wall one and a rear wall one, the hot and humid air inlet and the dry air outlet are arranged on the front wall one, the hot and humid air outlet and the cold and dry air inlet are arranged on the rear wall one, and the hot and humid air outlet is located above the hot and humid air inlet, and the cold and dry air inlet is located above the dry air outlet, the cooling heat exchanger includes a front wall two and a rear wall two, the hot and humid air cooling inlet and the cold and humid air outlet are arranged on the front wall two, the refrigerant inlet and the refrigerant outlet are arranged on the rear wall two, the intermediate separator includes a frame-shaped separator frame shell, a partition for separating the connecting chamber and the separation chamber is arranged in the separator frame shell, the front end of the separator frame shell abuts against the rear wall one, the rear end of the separator frame shell abuts against the front wall two, the front end of the partition abuts against the rear wall one, and the rear end of the partition abuts against the front wall two.

[0006] In the above-mentioned three-in-one plate heat exchanger of the cold dryer, the partition includes a plurality of transverse partitions which are arranged horizontally in sequence from top to bottom, the left end of the transverse partition is connected to the left inner wall of the separator frame shell, and the right end of the transverse partition is connected to the right inner wall of the separator frame shell, and each of the transverse partitions is provided with a plurality of through holes.

[0007] In the above-mentioned three-in-one plate heat exchanger for the cold dryer, the edge of the transverse partition has a plurality of penetrating notches.

[0008] In the above-mentioned three-in-one plate heat exchanger of the cold dryer, the partition includes a plurality of left partitions and right partitions which are arranged alternately from top to bottom, and the left partitions and the right partitions are arranged horizontally. Each of the left partitions is connected to the left inner wall of the separator frame shell and extends toward the right side of the separator frame shell, and there is a gap between the outer edge of the left partition and the right inner wall of the separator frame shell. Each of the right partitions is connected to the right inner wall of the separator frame shell and extends toward the left side of the separator frame shell, and there is a gap between the outer edge of the right partition and the left inner wall of the separator frame shell.

[0009] In the above-mentioned cold and dryer three-in-one plate heat exchanger, the outer sides of the left partition plate and the right partition plate both have downwardly folded retaining edges.

[0010] In the above-mentioned three-in-one plate heat exchanger of the cold dryer, the partition includes a left longitudinal partition and a right longitudinal partition arranged vertically at intervals, the top end of the left longitudinal partition is connected to the top inner wall of the separator frame shell and there is a gap between the bottom end of the left longitudinal partition and the bottom inner wall of the separator frame shell, the bottom end of the right longitudinal partition is connected to the bottom inner wall of the separator frame shell and there is a gap between the bottom end of the right longitudinal partition and the top inner wall of the separator frame shell, and the filter mesh block is clamped between the left longitudinal partition and the right longitudinal partition.

[0011] In the above-mentioned three-in-one plate heat exchanger of the cold dryer, the partition includes a baffle bar 1 and a baffle bar 2 which are symmetrically arranged in pairs. The baffle bar 1 is fixedly connected to the inner wall on the left side of the separator frame shell and extends toward the right side of the separator frame shell. The baffle bar 2 is fixedly connected to the inner wall on the right side of the separator frame shell and extends toward the left side of the separator frame shell. There is a gap between the outer edge of the baffle bar 1 and the outer edge of the baffle bar 2.

[0012] In the above-mentioned cold and dryer three-in-one plate heat exchanger, the front end surface of the partition plate abuts against the rear wall 1, and the rear end surface of the partition plate abuts against the front wall 2.

[0013] In the above-mentioned cold dryer three-in-one plate heat exchanger, the cross-sectional size of the connecting cavity is greater than or equal to the size of the hot and humid air outlet, thereby maximizing the flow area.

[0014] In the above-mentioned three-in-one plate heat exchanger for the cold and dry machine, the pre-cooling heat exchanger, the intermediate separator and the cooling heat exchanger are brazed into an integrated structure.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The present invention stacks the precooling heat exchanger, the intermediate separator and the cooling heat exchanger in sequence by brazing to form an integrated structure, which is more compact;

[0017] 2. The intermediate separator of the present invention is provided with a partition, and the front and rear ends of the partition are respectively connected to the rear wall of the precooling heat exchanger and the front wall of the cooling heat exchanger, which can effectively improve the pressure resistance of the three-in-one heat exchanger. At the same time, the filter mesh block is provided to improve the water separation efficiency and the drying effect is good;

[0018] 3. The present invention integrates the traditional steam-water separator into the plate heat exchanger, which has a compact structure, avoids the cumbersome installation at a later stage and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the prior art.

[0020] Figure 2 It is an exploded view of the first embodiment of the present invention.

[0021] Figure 3 It is an exploded view of the first embodiment of the present invention from another angle.

[0022] Figure 4 It is a schematic structural diagram of the transverse partition in the second embodiment of the present invention.

[0023] Figure 5 It is an exploded view of embodiment 3 of the present invention.

[0024] Figure 6It is an exploded view of embodiment 4 of the present invention.

[0025] Figure 7 It is an exploded view of embodiment 5 of the present invention.

[0026] Figure 8 It is a flow chart of the intermediate separator of embodiment 5 of the present invention.

[0027] Fig. 9 It is an exploded view of embodiment 6 of the present invention.

[0028] Fig.10 It is a schematic structural diagram of a gas intermediate separator according to an embodiment of the present invention.

[0029] In the figure, 1, pre-cooling heat exchanger; 2, intermediate separator; 3, cooling heat exchanger; 4, hot and humid air inlet; 5, hot and humid air outlet; 6, cold and dry air inlet; 7, dry air outlet; 8, hot and humid air cooling inlet; 9, cold and humid air outlet; 10, refrigerant inlet; 11, refrigerant outlet; 12, connecting cavity; 13, separation cavity; 14, filter mesh block; 15, front wall one; 16, rear wall one; 17, front wall two; 18, rear wall two; 19, separator frame; 20, partition; 21, horizontal partition; 22, through hole; 23, left partition; 24, right partition; 25, baffle; 26, left longitudinal partition; 27, right longitudinal partition; 28, baffle one; 29, baffle two; 30, drain pipe; 31, upper baffle; 32, lower baffle; 33, gap. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0031] Embodiment 1:

[0032] Reference Figure 2 and Figure 3The present embodiment is a three-in-one cold and dry machine three-in-one plate heat exchanger, comprising a precooling heat exchanger 1, an intermediate separator 2 and a cooling heat exchanger 3 which are brazed into an integrated structure in sequence, the precooling heat exchanger 1 comprising a front wall 15 and a rear wall 16, the front wall 15 is provided with a hot and humid air inlet 4 and a dry air outlet 7, wherein the hot and humid air inlet 4 is arranged at the lower right corner of the front wall 15, the dry air outlet 7 is arranged at the lower left corner of the front wall 15, the rear wall 16 is provided with a hot and humid air outlet 5 and a cold and dry air inlet 6, wherein the hot and humid air outlet 5 is arranged at the upper right corner of the rear wall 16, the cold and dry air inlet 6 is arranged at the rear wall 1 6, that is, the hot and humid air outlet 5 is located above the hot and humid air inlet 4, and the cold and dry air inlet 6 is located above the dry air outlet 7. The pre-cooling heat exchanger 1 has a relatively independent hot and humid air flow channel and a dry air flow channel with heat exchange, the hot and humid air inlet 4 and the hot and humid air outlet 5 are connected through the hot and humid air flow channel, and the cold and dry air inlet 6 and the dry air outlet 7 are connected through the dry air flow channel; the cooling heat exchanger 3 includes a front wall 17 and a rear wall 18, and the front wall 17 is provided with a hot and humid air cooling inlet 8 and a cold and humid air outlet 9, wherein the hot and humid air cooling inlet 8 is arranged at the upper right corner of the front wall 17 and is located at the same position as the hot and humid air outlet 9. Corresponding to the wet air outlet 5, the cold wet air outlet 9 is arranged at the upper right corner of the front wall 17, and the rear wall 18 is provided with a refrigerant inlet 10 and a refrigerant outlet 11, wherein the refrigerant inlet 10 is located at the lower left corner of the rear wall 18, and the refrigerant outlet 11 is located at the upper left corner of the rear wall 18 and above the refrigerant inlet 10. The cooling heat exchanger 3 has a relatively independent refrigerant channel and a refrigeration channel with heat exchange, the refrigerant inlet 10 and the refrigerant outlet 11 are connected through the refrigerant channel, the hot and wet air cooling inlet 8 and the cold and wet air outlet 9 are connected through the refrigeration channel, and there is heat exchange between the refrigerant channel and the refrigeration channel; intermediate separator 2 comprises a frame-shaped separator housing 19, the separator housing 19 is divided into two independent communicating chambers 12 and separating chambers 13 by a dividing piece 20, the front end of the separator housing 19 abuts against the rear wall 16, the rear end of the separator housing 19 abuts against the front wall 17, the front end of the dividing piece 20 abuts against the rear wall 16, and the rear end of the dividing piece 20 abuts against the front wall 17, that is, the separating chamber 13 is surrounded by the separator housing 19 except the upper right part, the dividing piece 20, the rear wall 16 and the front wall 17, and the communicating chamber 12 is surrounded by the upper right part of the separator housing 19, the dividing piece 20, the rear wall 16 and the front wall 17;The cross section of the connecting chamber 12 is tubular, the connecting chamber 12 is connected to the hot and humid air outlet 5 and the hot and humid air cooling inlet 8, the separation chamber 13 is connected to the cold and humid air outlet 9 and the cold and dry air inlet 6, and a partition structure is arranged in the separation chamber 13, the partition structure includes a plurality of transverse partitions 21 arranged transversely in sequence from top to bottom, the left end of the transverse partition 21 is connected to the left inner wall of the separator frame shell 19, and the right end of the transverse partition 21 is connected to the right inner wall of the separator frame shell 19, and each transverse partition 21 is provided with a plurality of through-type through holes 22, and a filter mesh block 14 is arranged between two adjacent partitions, and the filter mesh block 14 is a filter mesh block for condensing the cold and humid air. ;

[0033] The working process of the first embodiment is as follows: the compressed hot and humid air enters from the hot and humid air inlet 4 of the precooling heat exchanger 1, is discharged from the hot and humid air outlet 5, passes through the connecting cavity 12 of the intermediate separator 2, and then enters the cooling heat exchanger 3 through the hot and humid air cooling inlet 8. The hot and humid air is converted into cold and humid air after being cooled by the refrigerant of the cooling heat exchanger 3, and is discharged from the cold and humid air outlet 9 to the separation cavity 13 of the intermediate separator 2. In the process of the cold and humid air moving from bottom to top, moisture and condensable pollutants are precipitated on the diaphragm 21 and the filter mesh block 14, and flow downward in the separator. The cold and humid air is separated from the bottom of the cavity 13 and discharged through the drain pipe 30 at the bottom of the intermediate separator 2. The cold and humid air is converted into cold and dry air after separation by the intermediate separator 2. The cold and dry air enters the precooling heat exchanger 1 through the cold and dry air inlet 6. The cold and dry air exchanges heat with the hot and humid air in the hot and humid air flow channel during the flow in the dry air flow channel, which can precool the hot and humid air that has just entered, reduce the power consumption of the refrigeration system, and at the same time make the temperature of the dry air discharged from the dry air outlet 7 relatively higher, avoiding condensation in the pipeline during the subsequent transportation of the dry air.

[0034] Embodiment 2:

[0035] Reference Figure 4 The structure of the third embodiment is basically the same as that of the first embodiment, except that the transverse partition plate 21 in the second embodiment not only has a plurality of through holes 22 in the middle, but also has a plurality of through-type notches 33 at the edge of the cross bar plate 21. In addition to increasing the flow area, when condensed water is generated on the inner wall of the separator frame shell 19 of the intermediate separator 2, the rear wall 16 of the precooling heat exchanger 1 and the front wall 17 of the cooling heat exchanger 3, the water flow can flow down along the wall surface, and the separation effect is better.

[0036] Embodiment three:

[0037] Reference Figure 5The structure of the third embodiment is basically the same as that of the first embodiment, except that the partition structure of the third embodiment is a plurality of left partitions 23 and right partitions 24 arranged alternately from top to bottom, the left partitions 23 and the right partitions 24 are arranged horizontally, each left partition 23 is connected to the inner wall on the left side of the separator frame shell 19 and extends toward the right side of the separator frame shell 19, and there is a gap between the outer edge of the left partition 23 and the inner wall on the right side of the separator frame shell 19, each right partition 24 is connected to the inner wall on the right side of the separator frame shell 19 and extends toward the left side of the separator frame shell 19, and there is a gap between the outer edge of the right partition 24 and the inner wall on the left side of the separator frame shell 19, and the filter mesh block 14 is sandwiched between the left partition 23 and the right partition 24. The second embodiment can effectively increase the flow distance of compressed air and improve the water filtering efficiency. At the same time, the second embodiment also increases the welding surface of the intermediate heat exchanger 3 with the precooling heat exchanger 1 and the cooling heat exchanger 3 to improve the pressure resistance of the three-in-one heat exchanger.

[0038] Embodiment 4:

[0039] Reference Figure 6 The structure of the fourth embodiment is basically the same as that of the third embodiment, except that the outer edges of the left partition 23 and the right partition 24 have a downwardly folded retaining edge 25, and the retaining edge 25 and the left partition 23 or the right partition 24 have an angle of 90°-180°, so that the separated water can return to the bottom of the middle separator 2 to the maximum extent and be discharged from the drain pipe 30.

[0040] Embodiment five:

[0041] Reference Figure 7 and Figure 8 The structure of the fifth embodiment is basically the same as that of the first embodiment, except that the partition structure of the fourth embodiment is a left longitudinal partition 26 and a right longitudinal partition 27 arranged vertically at intervals, the top end of the left longitudinal partition 26 is connected to the top inner wall of the separator frame shell 19 and there is a gap between the bottom end of the left longitudinal partition 26 and the bottom inner wall of the separator frame shell 19, the bottom end of the right longitudinal partition 27 is connected to the bottom inner wall of the separator frame shell 19 and there is a gap between the bottom end of the right longitudinal partition 27 and the top inner wall of the separator frame shell 19, and the filter screen block 14 is sandwiched between the left longitudinal partition 26 and the right longitudinal partition 27.

[0042] Furthermore, the bottom end of the left longitudinal partition plate 26 has a lower retaining edge 32 that is folded toward the right longitudinal partition plate 27 and has a spacing therebetween, and the bottom end of the right longitudinal partition plate 27 has an upper retaining edge 31 that is folded toward the left longitudinal partition plate 26 and has a spacing therebetween.

[0043] In the fifth embodiment, the left longitudinal partition 26 and the right longitudinal partition 27 divide the middle separator 2 into three processes. After the compressed air comes out from the cold and wet air outlet 9, it runs upward in the right process, then turns to the middle process and flows downward through the filter block 14, and finally flows upward through the left process to enter the cold and dry air inlet 6, which is beneficial to the separation of moisture. At the same time, since the left longitudinal partition 26 and the right longitudinal partition 27 are evenly distributed in the middle separator 2, the three-in-one heat exchanger is evenly welded, thereby improving the pressure resistance.

[0044] Embodiment six:

[0045] Reference Fig. 9 The structure of the sixth embodiment is basically the same as that of the first embodiment, except that the transverse partition 21 of the fifth embodiment is changed into a pair of symmetrically arranged baffles 1 28 and 29, which are located at the same level, and baffles 1 28 is fixedly connected to the left inner wall of the separator frame shell 19 and extends toward the right side of the separator frame shell 19, and baffles 29 are fixedly connected to the right inner wall of the separator frame shell 19 and extend toward the left side of the separator frame shell 19, and there is a gap between the outer edge of baffles 1 28 and the outer edge of baffles 2 29. The left top and left bottom of the filter mesh block 14 are sandwiched between the two baffles 1 28, and the right top and right bottom of the filter mesh block 14 are sandwiched between the two baffles 29. The fifth embodiment can maximize the co-flow area of ​​the compressed air and reduce the pressure resistance.

[0046] Embodiment seven:

[0047] Reference Fig.10 The structure of the seventh embodiment is basically the same as that of the first embodiment. The difference is that in the present embodiment, the partition 20 divides the connecting cavity 12 into a circle, a rectangle or a square, and the cross-sectional size of the connecting tube 12 is larger than the size of the hot and humid air outlet 5, which can maximize the flow area of ​​the compressed air and reduce the pressure loss of the compressed air.

[0048] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A three-in-one plate heat exchanger for a cold dryer, comprising a precooling heat exchanger (1), an intermediate separator (2) and a cooling heat exchanger (3), characterized in that: The precooling heat exchanger (1) is provided with a hot and humid air inlet (4), a hot and humid air outlet (5), a hot and humid air flow channel, a cold and dry air inlet (6), a dry air outlet (7) and a dry air flow channel. The hot and humid air inlet (4) and the hot and humid air outlet (5) are connected via the hot and humid air flow channel, the cold and dry air inlet (6) and the dry air outlet (7) are connected via the dry air flow channel, and heat exchange is performed between the hot and humid air flow channel and the dry air flow channel. The cooling heat exchanger (3) is provided with a hot and humid air cooling inlet (8), a cold and humid air outlet (9), a refrigerant inlet (1 0) and a refrigerant outlet (11), the refrigerant inlet (10) and the refrigerant outlet (11) are connected via a refrigerant channel, the hot and humid air cooling inlet (8) and the cold and humid air outlet (9) are connected via a refrigeration channel, and heat exchange is performed between the refrigerant channel and the refrigeration channel, the intermediate separator (2) is sandwiched between the precooling heat exchanger (1) and the cooling heat exchanger (3), and the intermediate separator (2) includes a mutually independent connecting chamber (12) and a separating chamber (13), the connecting chamber (12) is connected to the hot and humid air outlet (5) and the hot and humid air cooling inlet (8), The separation chamber (13) is connected to the cold and moist air outlet (9) and the cold and dry air inlet (6). A plurality of partitions are arranged in the separation chamber (13). A filter mesh block (14) is arranged between at least two of the partitions. The partitions include a plurality of left partitions (23) and right partitions (24) arranged alternately from top to bottom. The left partitions (23) and the right partitions (24) are arranged transversely. Each of the left partitions (23) is connected to the left inner wall of the separator frame (19) and extends toward the right side of the separator frame (19). The outer edge of the left partition (23) is in contact with the separator frame (19). 9) There is a gap between the right inner walls, each of the right partitions (24) is connected to the right inner wall of the separator frame shell (19) and extends toward the left side of the separator frame shell (19), and there is a gap between the outer edge of the right partition (24) and the left inner wall of the separator frame shell (19), and the outer edges of the left partition (23) and the right partition (24) both have a downwardly folded retaining edge (25), the front end face of the partition abuts against the rear wall one (16), and the rear end face of the partition abuts against the front wall two (17), and the cross-sectional size of the connecting cavity (12) is greater than or equal to the size of the hot and humid air outlet (5).

2. The three-in-one plate heat exchanger for a cold dryer according to claim 1, characterized in that: The precooling heat exchanger (1) comprises a front wall (15) and a rear wall (16), the hot and humid air inlet (4) and the dry air outlet (7) are arranged on the front wall (15), the hot and humid air outlet (5) and the cold and dry air inlet (6) are arranged on the rear wall (16), and the hot and humid air outlet (5) is located above the hot and humid air inlet (4), and the cold and dry air inlet (6) is located above the dry air outlet (7); the cooling heat exchanger (3) comprises a front wall (17) and a rear wall (18), the hot and humid air cooling inlet (8) and the cold and humid air outlet (9) are arranged on the front wall The refrigerant inlet (10) and the refrigerant outlet (11) are arranged on the rear wall two (17), the intermediate separator (2) includes a frame-shaped separator frame shell (19), and the separator frame shell (19) is provided with a partition (20) for separating the connecting cavity (12) and the separation cavity (13), the front end of the separator frame shell (19) abuts against the rear wall one (16), and the rear end of the separator frame shell (19) abuts against the front wall two (17), the front end of the partition (20) abuts against the rear wall one (16), and the rear end of the partition (20) abuts against the front wall two (17).

3. The three-in-one plate heat exchanger for a cold dryer according to claim 2, characterized in that: The partition plate comprises a plurality of transverse partition plates (21) which are arranged in a spaced relationship from top to bottom, the left end of the transverse partition plate (21) being connected to the left inner wall of the separator frame shell (19), and the right end of the transverse partition plate (21) being connected to the right inner wall of the separator frame shell (19), and each of the transverse partition plates (21) being provided with a plurality of through holes (22).

4. The three-in-one plate heat exchanger for a cold dryer according to claim 3, characterized in that: The edge of the transverse partition (21) has a plurality of through-type notches (33).

5. The three-in-one plate heat exchanger for a cold dryer according to claim 2, characterized in that: The partition comprises a left longitudinal partition (26) and a right longitudinal partition (27) which are arranged at a vertical interval. The top end of the left longitudinal partition (26) is connected to the top inner wall of the separator frame (19), and a gap is formed between the bottom end of the left longitudinal partition (26) and the bottom inner wall of the separator frame (19). The bottom end of the right longitudinal partition (27) is connected to the bottom inner wall of the separator frame (19), and a gap is formed between the bottom end of the right longitudinal partition (27) and the top inner wall of the separator frame (19). The filter mesh block (14) is sandwiched between the left longitudinal partition (26) and the right longitudinal partition (27).

6. The three-in-one plate heat exchanger for a cold dryer according to claim 2, characterized in that: The partition comprises a baffle bar 1 (28) and a baffle bar 2 (29) which are symmetrically arranged in a pair, wherein the baffle bar 1 (28) and the baffle bar 2 (29) are located at the same horizontal height, the baffle bar 1 (28) is fixedly connected to the left inner wall of the separator frame shell (19) and extends toward the right side of the separator frame shell (19), and the baffle bar 2 (29) is fixedly connected to the right inner wall of the separator frame shell (19) and extends toward the left side of the separator frame shell (19), and there is a gap between the outer edges of the baffle bar 1 (28) and the outer edges of the baffle bar 2 (29).

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