CN111780569B - First heat exchange plate and micro-channel condenser - Google Patents

Abstract

The invention relates to the technical field of heat exchange and discloses a first heat exchange plate and a micro-channel condenser. The first heat exchange plate is provided with a steam inlet and a water outlet, one plate surface of the first heat exchange plate is provided with a plurality of condensing channels, and two ends of each condensing channel are respectively communicated with the steam inlet and the water outlet; each condensing channel comprises a plurality of single-row channels and at least one multi-row channel which are connected in series, one multi-row channel is communicated between every two adjacent single-row channels, and the multi-row channel comprises a plurality of parallel branch channels. The condensing channel of the first heat exchange plate provided by the embodiment of the invention comprises a single-row channel and a plurality of rows of channels which are connected in series, when the first heat exchange plate is used as a steam condensing plate, steam can be repeatedly collected and separated in the condensing channel, the convective heat exchange strength of the condenser is enhanced, the condensing heat transfer efficiency of the condensing channel can be obviously improved, and the volume of the condenser is relatively reduced.

Description

First heat exchange plate and micro-channel condenser

Technical Field

The invention relates to the technical field of heat exchange, in particular to a first heat exchange plate and a micro-channel condenser.

Background

At present, the traditional surface formula condenser that generally adopts includes the condensation core in steam power system, and the condensation core is by steam condensation board and the range upon range of formation of cooling water board, and steam condensation board and cooling water board are provided with steam passage and cooling water passageway respectively, and the convection condensation heat transfer of the steam in through steam passage and the cooling water in the cooling water passageway to realize steam condensation, and current condenser exists bulky, is unfavorable for the problem of system integration.

Disclosure of Invention

The embodiment of the invention provides a first heat exchange plate and a micro-channel condenser, which are used for solving or partially solving the problems that the existing condenser is large in size and not beneficial to system integration.

The embodiment of the invention provides a first heat exchange plate, which is provided with a steam inlet and a water outlet, wherein a plurality of condensation channels are arranged on one plate surface of the first heat exchange plate, and two ends of each condensation channel are respectively communicated with the steam inlet and the water outlet; each condensing channel comprises a plurality of single-row channels and at least one multi-row channel which are connected in series, one multi-row channel is communicated between every two adjacent single-row channels, and the multi-row channel comprises a plurality of parallel branch channels.

The first heat exchange plate is provided with a steam inlet distribution channel on the plate surface provided with the condensation channel, the steam inlet distribution channel is communicated with the inlets of the condensation channels, and the steam inlet distribution channel penetrates through the side surface of the first heat exchange plate in the direction away from the inlets of the condensation channels to form the steam inlet.

The bottom wall of the steam inlet distribution channel is provided with a second communicating hole, a second annular boss surrounding the second communicating hole is convexly arranged on the bottom wall of the steam inlet distribution channel, the end face of the second annular boss is flush with the plate surface of the first heat exchange plate, the second communicating hole is a round hole, the second annular boss is an annular boss, and the outer diameter of the second annular boss is larger than twice of the diameter of the second communicating hole.

The first heat exchange plate is provided with a condensed water collecting and discharging channel on the plate surface provided with the condensation channel, the condensed water collecting and discharging channel is communicated with a plurality of outlets of the condensation channel, and the condensed water collecting and discharging channel penetrates through the side surface of the first heat exchange plate in the direction away from the plurality of outlets of the condensation channel to form the water outlet.

The bottom wall of the condensed water collecting and discharging channel is provided with a first communication hole, a first annular boss surrounding the first communication hole is convexly arranged on the bottom wall of the condensed water collecting and discharging channel, the end face of the first annular boss is flush with the surface of the first heat exchange plate, the first communication hole is a round hole, the first annular boss is a circular-ring-shaped boss, and the outer diameter of the first annular boss is larger than twice of the diameter of the first communication hole.

The single-row channel is a linear channel with a straight line extending direction; and/or the presence of a gas in the gas,

the branch channel is an arc-shaped channel with an arc line in the extending direction; and/or the presence of a gas in the gas,

the multi-row channel comprises two branch channels, the inlet side edges of the two branch channels on the side close to each other are connected, and the outlet side edges of the two branch channels on the side close to each other are connected.

The first heat exchange plate is provided with an air suction port, an exhaust channel is arranged on the plate surface provided with the condensation channel of the first heat exchange plate, and the exhaust channel comprises an air suction channel and a gas discharge channel;

the air pumping channel is communicated with the plurality of condensing channels, at least one end of the air pumping channel is provided with an outlet, and the gas discharge channel is communicated with the outlet of the air pumping channel and the air pumping hole.

The condensation channel extends along a first direction, the condensation channel is arranged in parallel in a second direction, the air exhaust channel extends along the second direction and is communicated with a plurality of single-row channels of the condensation channel, the air exhaust channel is arranged in parallel in the first direction, and the first direction is intersected with the second direction.

Wherein the gas discharge channel is located at one side of the plurality of the condensing channels in the second direction, the gas discharge channel including:

the air exhaust main channel extends along the first direction and is communicated with one end of the plurality of air exhaust channels;

the extracted air condensation distribution channel extends along the second direction, and one end of the extracted air condensation distribution channel is communicated with the extracted air main channel;

the extracted air condensing channels extend along the first direction, a plurality of extracted air condensing channels are arranged in parallel along the second direction, and inlets of the plurality of extracted air condensing channels are communicated with one end of the extracted air condensing distribution channel, which is far away from the extracted air main channel; and the number of the first and second groups,

and the air exhaust condensation collecting channel is communicated with the outlets of the air exhaust condensation channels and the air exhaust port.

One end of the air exhaust main channel, which is close to the outlets of the plurality of condensation channels, is communicated with the water outlet through an air exhaust condensate discharge channel.

The outlet end of the gas discharge channel penetrates through the side surface of the first heat exchange plate to form the pumping hole; and/or the presence of a gas in the gas,

the two outlets of the air pumping channel are respectively communicated with the two air pumping ports through the two air discharging channels.

The exhaust channel further comprises an exhaust condensate discharge channel, and the exhaust condensate discharge channel is communicated with the gas discharge channel and the water outlet.

The air-extracting condensed water discharge channel is gradually arranged in a shrinking manner in the direction close to the water outlet.

Wherein the gas discharge channel comprises a plurality of pumping condensation channels arranged in parallel.

The embodiment of the invention also provides a condenser, which comprises the first heat exchange plate.

Wherein the condenser is a microchannel condenser.

An embodiment of the present invention further provides a condenser, including:

a first heat exchanger plate as described above;

the cooling air extraction channel and two ends of each fluid channel are respectively communicated with the fluid inlet and the fluid outlet; and the number of the first and second groups,

the second heat exchange plates and the first heat exchange plates are arranged in the shell in a stacked mode, the surface, provided with a fluid channel, of each second heat exchange plate and the surface, provided with a condensation channel, of each first heat exchange plate face the same direction, one first heat exchange plate is arranged between every two adjacent second heat exchange plates, and the shell is provided with a shell steam inlet, a shell water outlet, a shell air suction port, a shell fluid inlet and a shell fluid outlet which respectively correspond to a steam inlet, a water outlet and an air suction port of each first heat exchange plate and a fluid inlet and a fluid outlet of each second heat exchange plate;

the plurality of condensing channels of the first heat exchange plate are at least partially opposite to the plurality of fluid channels of the second heat exchange plate in a direction perpendicular to the plate surface of the first heat exchange plate, and the gas exhaust channel of the first heat exchange plate is at least partially opposite to the cooling air exhaust channel of the second heat exchange plate in a direction perpendicular to the plate surface of the first heat exchange plate.

Wherein the condenser is a microchannel condenser.

The condensing channel of the first heat exchange plate provided by the embodiment of the invention comprises a single-row channel and a plurality of rows of channels which are connected in series, when the first heat exchange plate is used as a steam condensing plate, steam can be repeatedly collected and separated in the condensing channel, the convective heat exchange strength of the condenser is enhanced, the condensing heat transfer efficiency of the condensing channel can be obviously improved, and the volume of the condenser is relatively reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of a first heat exchange plate according to an embodiment of the present invention;

FIG. 2 is an enlarged partial schematic view of the condensation channel of FIG. 1;

fig. 3 is a schematic structural diagram of a condenser according to an embodiment of the present invention, wherein a dotted line portion is a first heat exchange plate;

FIG. 4 is a front view of the condenser of FIG. 3 with the second heat exchange plate shown in phantom;

FIG. 5 is a side view of FIG. 4 with dashed portions depicting the first and second heat exchanger plates in a stacked arrangement;

FIG. 6 is a top view of FIG. 4;

FIG. 7 is a schematic view of the second heat exchange plate of FIG. 4;

description of reference numerals: the condenser 1000, the first heat exchange plate 100, the condensation channel 1, the single-row channel 11, the multi-row channel 12, the branch channel 121, the flow dividing protrusion 122, the steam inlet distribution channel 2, the second communication hole 21, the second annular boss 22, the condensate collecting and discharging channel 3, the first communication hole 31, the first annular boss 32, the exhaust channel 4, the air exhaust channel 41, the air exhaust total channel 42, the air exhaust condensation distribution channel 43, the air exhaust condensation channel 44, the air exhaust condensation collecting channel 45, the air exhaust condensate discharging channel 46, the second heat exchange plate 200, the fluid inlet 210, the fluid outlet 220, the cooling air exhaust channel 230, the fluid channel 240, the inlet section 241, the outlet section 242, the heat exchange sections 243, the fluid distribution channel 250, the fluid collecting and discharging channel 260, the inlet fluid distribution groove 270, the outlet fluid collecting groove 280, the housing 300, the housing steam inlet 310, the housing water outlet 320, the housing air exhaust port 330, the housing fluid inlet 340, A housing fluid outlet 350, a vapor admission buffer chamber 360, a condensate storage chamber 370.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The condenser comprises a condensation core body, the condensation core body is formed by stacking a steam condensation plate and a cooling water plate, the steam condensation plate and the cooling water plate are respectively provided with a steam channel and a cooling water channel, and the steam in the steam channel and the cooling water in the cooling water channel are subjected to convective condensation heat exchange to realize steam condensation. The power of condenser is relevant with the heat transfer area of steam condensation board, and the heat transfer area of steam condensation board is relevant with the size of steam condensation board, and the size is big more for steam condensation board generally, and the power of condenser is also big more, so under the condition that the power of condenser is confirmed, can reduce the size of steam condensation board through the condensation heat transfer efficiency who promotes steam condensation board to reduce the volume of condenser.

Embodiments of the present invention provide a first heat exchange plate that can be used as a steam condensation plate of a condenser.

As shown in fig. 1 and 2, in the present embodiment, the first heat exchange plate 100 is provided with a steam inlet (not shown in the drawings) and a water outlet (not shown in the drawings), a plurality of condensing channels 1 are provided on one plate surface of the first heat exchange plate 100, and both ends of each condensing channel 1 are respectively communicated with the steam inlet and the water outlet. The plate surface of the first heat exchange plate 100 provided with the condensing channel 1 is taken as the front surface of the first heat exchange plate 100, and the plate surface of the first heat exchange plate 100 opposite to the front surface is taken as the back surface of the first heat exchange plate 100, wherein the steam inlet may be a hole which is arranged on the front surface of the first heat exchange plate 100 and penetrates through the first heat exchange plate 100; as shown in fig. 1, in this embodiment, the first heat exchange plate 100 is provided with a steam inlet distribution channel 2 on a plate surface provided with the condensation channels 1 (i.e., on a front surface of the first heat exchange plate 100), the steam inlet distribution channel 2 is communicated with inlets of the plurality of condensation channels 1, the steam inlet distribution channel 2 penetrates through a side surface of the first heat exchange plate 100 in a direction away from the inlets of the plurality of condensation channels 1 to form steam inlets, and by the arrangement of the steam inlet distribution channel 2, not only can a flow resistance of steam near the steam inlets be reduced, but also steam flowing in from the steam inlets can be uniformly distributed to the respective condensation channels 1.

Similarly, the water outlet may be a hole disposed on the front surface of the first heat exchange plate 100 and penetrating through the first heat exchange plate 100; as shown in fig. 1, in this embodiment, the first heat exchange plate 100 is provided with a condensed water collecting and discharging channel 3 on the plate surface provided with the condensation channel 1, the condensed water collecting and discharging channel 3 is communicated with the outlets of the plurality of condensation channels 1, the condensed water collecting and discharging channel 3 penetrates through the side surface of the first heat exchange plate 100 in the direction away from the outlets of the plurality of condensation channels 1, so as to form a water outlet, the condensed water collecting and discharging channel 3 is provided, which is beneficial to collecting the condensed water flowing out from the outlets of the plurality of condensation channels 1 to the water outlet, and the condensed water is uniformly discharged from the water outlet.

The steam inlet distribution channel 2, the condensed water collecting and discharging channel 3, and the condensation channel 1 do not penetrate through the first heat exchange plate 100, and the steam inlet distribution channel 2, the condensed water collecting and discharging channel 3, and the condensation channel 1 may be formed on the first heat exchange plate 100 (the material of the first heat exchange plate 100 is usually metal) by using methods such as laser, chemical etching, and the like. The shapes of the steam inlet distribution channel 2, the condensed water collection and discharge channel 3 and the condensation channel 1 can be set according to actual requirements, for example, the shapes of the steam inlet distribution channel 2 and the condensed water collection and discharge channel 3 can be square, trapezoidal or irregular, and the like, and the condensation channel 1 can be a channel with the extending direction being a straight line, a curve, a wavy line or a broken line, and the like, specifically, as shown in fig. 1, in this embodiment, the first heat exchange plate 100 is a rectangular plate, the condensation channel 1 extends along the long side direction of the rectangle, the plurality of condensation channels 1 are arranged in parallel in the short side direction of the rectangle, and the steam inlet distribution channel 2 and the condensed water collection and discharge channel 3 are both square channels.

As shown in fig. 1 and 2, in the present embodiment, each condensing channel 1 includes a plurality of single-row channels 11 and at least one multi-row channel 12 connected in series, one multi-row channel 12 is provided in communication between two adjacent single-row channels 11, and the multi-row channel 12 includes a plurality of parallel branch channels 121. When the steam in the single-row channel 11 enters the multiple-row channels 12, the steam in the single-row channel 11 is separated into multiple strands to enter the multiple branch channels 121 of the multiple-row channels 12, respectively, and when the steam in the multiple-row channels 12 enters the single-row channel 11, the multiple strands of steam in the multiple branch channels 121 are collected into one strand to enter the single-row channel 11, because each condensing channel 1 usually includes multiple-row channels 12, the steam is repeatedly collected and separated in the condensing channel 1, so that the convective heat exchange strength of the first heat exchange plate 100 is enhanced, and the condensing heat transfer efficiency of the condensing channel 1 can be significantly improved. The shape of the single-row channel 11 may be set according to actual requirements, for example, the single-row channel 11 may be a channel having an extending direction in a shape of a straight line, a curve, a wavy line, or a broken line, and specifically, as shown in fig. 2, in this embodiment, the single-row channel 11 is a linear channel having an extending direction in a straight line, so that the single-row channel 11 is easy to machine and form, and is favorable for uniformly distributing steam in the single-row channel 11 to the connected branch channels 121.

Similarly, the shape of the branch channel 121 may be set according to actual requirements, for example, the branch channel 121 may be a channel having an extending direction of a straight line, a curved line, a wavy line, or a broken line, and specifically, as shown in fig. 2, in this embodiment, the branch channel 121 is an arc-shaped channel having an extending direction of an arc line, and the branch channel 121 is set to be an arc-shaped channel, so that the channel resistance generated by the branch channel 121 is small. The specific number of the branch channels 121 included in each multi-row channel 12 can also be set according to actual requirements, as shown in fig. 2, in this embodiment, the multi-row channel 12 includes two branch channels 121, the inlet side edges of the two adjacent side of the branch channels 121 are connected, the outlet side edges of the two adjacent side of the branch channels 121 are connected, the multi-row channel 12 includes only two branch channels 121, which is easy to process, and in this embodiment, the two branch channels 121 have an inner side that is adjacent to each other and an outer side that is away from each other, the two branch channels 121 are both arc-shaped channels that are convex outward, and the flow dividing protrusion 122 that is arranged between the two branch channels 121 at intervals is similar to an olive shape, so that the channel resistance generated by the multi-row channel 12 can become smaller.

The condensing channel 1 of the first heat exchange plate 100 provided by the embodiment of the invention comprises the single-row channel 11 and the multi-row channel 12 which are connected in series, when the first heat exchange plate 100 is used as a steam condensing plate, steam can be repeatedly collected and separated in the condensing channel 1, so that the convective heat exchange strength of the condenser is enhanced, the condensing heat transfer efficiency of the condensing channel 1 can be obviously improved, and the volume of the condenser is relatively reduced.

Specifically, as shown in fig. 1 and 2, in the present embodiment, both ends of each condensing channel 1 are provided with a single-row channel 11 to communicate with the steam inlet and the water outlet respectively through the single-row channels 11 located at both ends, the inlet of the condensing channel 1 is provided with the single-row channel 11 to facilitate the steam to enter into the condensing channel 1, and the outlet of the condensing channel 1 is provided with the single-row channel 11 to facilitate the condensed water to uniformly flow out of the condensing channel 1.

As shown in fig. 1 and 2, in the present embodiment, the condensation channels 1 extend along a first direction, the plurality of condensation channels 1 are arranged in parallel in a second direction, the single-row channels 11 of the plurality of condensation channels 1 are arranged in an array in the first direction and the second direction, and the multiple-row channels 12 of the plurality of condensation channels 1 are arranged in an array in the first direction and the second direction, so that the single-row channels 11 and the multiple-row channels 12 of the plurality of condensation channels 1 are arranged in an array, which is beneficial to increase the area ratio of the plurality of condensation channels 1 on the first heat exchange plate 100. The first direction intersects the second direction, for example, in the present embodiment, the first direction is perpendicular to or approximately perpendicular to the second direction.

An embodiment of the present invention further provides a condenser, as shown in fig. 3, where the condenser 1000 includes the first heat exchange plate 100 as described above, and the existing condenser has a problem that noise is generated due to vibration of an internal structure of the condenser induced by fluid excitation, and the internal structure vibration may also cause structural collision between the condenser and a support structure, which may cause stress corrosion of the condenser.

Specifically, as shown in fig. 3 to 5, in the present embodiment, the condenser 1000 includes a plurality of first heat exchange plates 100, a plurality of second heat exchange plates 200, and a housing 300.

As shown in fig. 4 and 7, in the present embodiment, the plurality of second heat exchange plates 200 can be used as cooling water plates of the condenser 1000, a plate surface of the second heat exchange plate 200 is provided with a fluid inlet 210, a fluid outlet 220 and a plurality of fluid channels 240, two ends of the cooling air extraction channel 230 and each of the fluid channels 240 are respectively communicated with the fluid inlet 210 and the fluid outlet 220, so that a fluid (for example, cooling water, which will be described below by taking the fluid as cooling water as an example) using cooling steam can flow in from the fluid inlet 210, then enter the plurality of fluid channels 240, and finally flow out from the fluid outlet 220. The plate surface of the second heat exchange plate 200 on which the fluid channel 240 is arranged is a front surface of the second heat exchange plate 200, and a plate surface of the second heat exchange plate 200 opposite to the front surface is a back surface of the second heat exchange plate 200, wherein the fluid channel 240 does not penetrate through the second heat exchange plate 200, and the fluid channel 240 can be processed on the second heat exchange plate 200 (the second heat exchange plate 200 is usually made of metal) by using methods such as laser, chemical etching, and the like; while the fluid inlet 210 and the fluid outlet 220 extend through the second heat exchange plate 200, the fluid inlet 210 and the fluid outlet 220 may be formed on the second heat exchange plate 200 by etching or punching.

As shown in fig. 1 and 3, in the present embodiment, a plurality of first heat exchange plates 100 can be used as the steam condensation plate of the condenser 1000, the first heat exchange plates 100 are opened with first communication holes 31 and second communication holes 21, and the first communication holes 31 and the second communication holes 21 are not communicated with the plurality of condensation passages 1 of the first heat exchange plates 100. As shown in fig. 5 and 6, the plurality of first heat exchange plates 100 and the plurality of second heat exchange plates 200 are stacked, and the plurality of second heat exchange plates 200 have the same surface orientation of the plate surface (i.e., the front surface of the second heat exchange plate 200) provided with the fluid passage 240 and the plate surface (i.e., the front surface of the first heat exchange plate 100) provided with the condensing passage 1 of the plurality of first heat exchange plates 100, one first heat exchange plate 100 is disposed between two adjacent second heat exchange plates 200, the first communication hole 31 of the first heat exchange plate 100 communicates with the fluid inlet 210 of the second heat exchange plate 200, the second communication hole 21 of the first heat exchange plate 100 communicates with the fluid outlet 220 of the second heat exchange plate 200, and the plurality of condensing passages 1 of the first heat exchange plate 100 and the plurality of fluid passages 240 of the second heat exchange plates 200 at least partially face each other in a direction perpendicular to the plate surfaces of the first heat exchange plates 100, so that steam in the condensing passages 1 can exchange heat with the cooling water in the fluid passages 240, to effect condensation of the vapor.

As shown in fig. 3 to 5, in the present embodiment, the plurality of second heat exchange plates 200 and the plurality of first heat exchange plates 100 are stacked and disposed in the housing 300, and the housing 300 is provided with a housing steam inlet 310, a housing water outlet 320, a housing fluid inlet 340 and a housing fluid outlet 350 corresponding to the steam inlet and the water outlet of the first heat exchange plates 100 and the fluid inlet 210 and the fluid outlet 220 of the second heat exchange plates 200, respectively. After entering the shell 300 from the steam inlet 310 of the shell, the steam enters the condensation channels 1 of the first heat exchange plates 100 from the steam inlets of the first heat exchange plates 100 (as shown in fig. 3, in this embodiment, a steam inlet buffer cavity 360 is disposed in the shell 300 and between the steam inlet 310 of the shell and the steam inlets of the first heat exchange plates 100, the steam inlet buffer cavity 360 is gradually extended from the steam inlet 310 of the shell to the steam inlets of the first heat exchange plates 100, and the steam inlet buffer cavity 360 is disposed to reduce resistance to the steam near the steam inlet 310 of the shell, which is beneficial for the steam to enter the shell 300 and for the steam to be uniformly distributed to the first heat exchange plates 100); after entering the housing 300 from the housing fluid inlet 340, the cooling water enters the fluid channels 240 of the second heat exchange plates 200 from the fluid inlets 210 of the second heat exchange plates 200; the steam in the condensing channel 1 exchanges heat with the cooling water in the fluid channel 240 for condensation, so as to condense the steam to form condensed water, the condensed water formed in the condensing channel 1 is discharged from the casing water outlet 320 to the outside of the casing 300 (as shown in fig. 3, in this embodiment, a condensed water storage chamber 370 is disposed in the casing 300 and between the casing water outlet 320 and the water outlets of the plurality of first heat exchange plates 100, the condensed water storage chamber 370 is gradually retracted from the water outlets of the plurality of first heat exchange plates 100 to the casing water outlet 320, the condensed water storage chamber 370 is disposed to facilitate the condensed water flowing from the water outlets of the plurality of first heat exchange plates 100 to be collected to the casing water outlet 320 for discharging to the outside of the casing 300), and the cooling water in the fluid channel 240 is discharged from the casing fluid outlet 350 to the outside of the casing 300. Wherein, the specific arrangement positions of the shell steam inlet 310, the shell water outlet 320, the shell fluid inlet 340 and the shell fluid outlet 350 on the shell 300 are related to the installation directions of the first heat exchange plate 100 and the second heat exchange plate 200 in the shell 300, specifically, as shown in fig. 1 and fig. 3, in this embodiment, the plurality of first heat exchange plates 100 and the plurality of second heat exchange plates 200 are horizontally stacked in the shell 300, the condensation channel 1 and the fluid channel 240 both extend along the up-down direction (i.e. the first direction is the up-down direction), the steam inlet and the water outlet are respectively located at the upper end and the lower end of the first heat exchange plate 100, the fluid inlet 210 and the fluid outlet 220 are respectively located at the lower end and the upper end of the second heat exchange plate 200, correspondingly, the shell steam inlet 310 is located at the upper end and the upper end of the shell 300, the shell water outlet 320 and the shell fluid inlet 340 are respectively located at the lower end and the upper end of the shell 300, and the case drain port 320 and the case fluid inlet port 340 are respectively located at both sides of the case 300 in a direction perpendicular to the plate surface of the first heat exchange plate 100.

Specifically, as shown in fig. 1 and 3, in this embodiment, the bottom wall of the condensed water collecting and discharging channel 3 is provided with a first communicating hole 31, the bottom wall of the condensed water collecting and discharging channel 3 is convexly provided with a first annular boss 32 surrounding the first communicating hole 31, an end surface of the first annular boss 32 is flush with a plate surface of the first heat exchange plate 100, the bottom wall of the steam inlet distribution channel 2 is provided with a second communicating hole 21, the bottom wall of the steam inlet distribution channel 2 is convexly provided with a second annular boss 22 surrounding the second communicating hole 21, an end surface of the second annular boss 22 is flush with the plate surface of the first heat exchange plate 100, so that when the first heat exchange plate 100 and the second heat exchange plate 200 are stacked, because the second annular boss 22 is attached to the plate surface of the second heat exchange plate 200, the second communicating hole 21 is communicated with the fluid outlet 220 of the second heat exchange plate 200, but the second communication hole 21 is not communicated with the steam inlet distribution channel 2 so that the steam in the steam inlet distribution channel 2 does not flow to the second communication hole 21; because the first annular boss 32 is attached to the plate surface of the second heat exchange plate 200, the first communication hole 31 is communicated with the fluid inlet 210 of the second heat exchange plate 200, and the first communication hole 31 is not communicated with the condensed water collecting and discharging channel 3, the condensed water in the condensed water collecting and discharging channel 3 cannot flow to the first communication hole 31.

Further, as shown in fig. 1 and fig. 3, in the present embodiment, the first through hole 31 is a circular hole, the first annular boss 32 is an annular boss, and the outer diameter of the first annular boss 32 is greater than twice the diameter of the first through hole 31; and/or the second communication hole 21 is a circular hole, the second annular boss 22 is a circular boss, and the outer diameter of the second annular boss 22 is larger than twice of the diameter of the second communication hole 21. The sealing effect at the through hole can be ensured by limiting the size relation between the annular boss and the through hole.

In order to pump away the non-condensable gas in the condenser 1000, it is usually necessary to provide an air pumping system and a steam condensation separator for the condenser 1000, where the steam condensation separator has a large volume and occupies a large space, as shown in fig. 1 to 3, in this embodiment, the first heat exchange plate 100 is provided with an air pumping port (not shown in the drawings), the first heat exchange plate 100 is provided with an exhaust passage 4 on a plate surface provided with the condensation passage 1 (i.e., on a front surface of the first heat exchange plate 100), and the exhaust passage 4 includes an air pumping passage 41 and a gas exhaust passage; the air exhaust channel 41 is communicated with the plurality of condensing channels 1, at least one end of the air exhaust channel 41 is provided with an outlet, the air exhaust channel is communicated with the outlet and the air exhaust port of the air exhaust channel 41, and correspondingly, the housing 300 is provided with a housing air exhaust port 330 corresponding to the air exhaust port of the first heat exchange plate 100. Because the exhaust passage 4 communicates with the air suction opening of the first heat exchange plate 100 and the plurality of condensing passages 1, and the air suction opening of the first heat exchange plate 100 communicates with the shell air suction opening 330, when the shell air suction opening 330 is externally connected with an air extractor, non-condensable gas in the plurality of condensing passages 1 can be extracted from the air suction opening of the first heat exchange plate 100, and finally exhausted to the outside of the shell 300 from the shell air suction opening 330, so that the air suction condensation separation function is integrated in the condenser 1000, and the whole structure of the steam power system is more compact.

The pumping channel 41 is communicated with a plurality of condensing channels 1, and particularly, the pumping channel 41 can be communicated with a plurality of rows of channels 12 of the condensing channels 1; the air exhaust channel 41 may also be in communication with the single-row channel 11 of the condensation channel 1, for example, as shown in fig. 1 to 3, in the present embodiment, the condensation channel 1 extends along the first direction, the plurality of condensation channels 1 are arranged in parallel along the second direction, the air exhaust channel 41 extends along the second direction and is in communication with the single-row channel 11 of the plurality of condensation channels 1, and the air exhaust channel 41 is arranged in parallel along the first direction, which is favorable for exhausting the non-condensable gas in the plurality of condensation channels 1 through the plurality of air exhaust channels 41.

Equally, the both ends of bleed passage 41 all are provided with the export, and gas emission passageway and extraction opening all correspond and set up two, and two exports of bleed passage 41 set up two gas emission passageways and extraction opening respectively through two gas emission passageway intercommunications, set up two gas emission passageways and extraction opening respectively in a plurality of condensing channel 1's both sides, are favorable to taking out the noncondensable gas in a plurality of condensing channel 1.

The gas extracted from the plurality of condensing passages 1 passes through the gas exhaust passage and is exhausted from the gas exhaust port of the first heat exchange plate 100, and the gas extracted from the plurality of condensing passages 1 is generally a mixed gas of steam and air, and in order to condense the steam in the mixed gas, as shown in fig. 4 and 7, in this embodiment, a plate surface of the second heat exchange plate 200, on which the fluid channel 240 is disposed, is provided with a cooling air extraction channel 230, two ends of the cooling air extraction channel 230 are respectively communicated with the fluid inlet 210 and the fluid outlet 220, and, the gas exhaust channel of the first heat exchange plate 100 and the cooling pumping channel 230 of the second heat exchange plate 200 at least partially face each other in a direction perpendicular to the plate surface of the first heat exchange plate 100, thus, a portion of the cooling water entering from the fluid inlet 210 enters the cooling pumping channel 230, and the cooling water in the cooling pumping channel 230 exchanges heat with the steam in the gas discharge channel to be condensed. Here, in the present embodiment, two gas exhaust passages are provided, so that the cooling pumping passage 230 is also correspondingly disposed at both sides of the second heat exchange plate 200 in the second direction in the region where the plurality of fluid passages 240 are provided. Specifically, as shown in fig. 4 and 7, in the present embodiment, the cooling air extracting channel 230 extends along a first direction, at least one side end of the second heat exchange plate 200 in the second direction is provided with a plurality of cooling air extracting channels 230 in parallel along the second direction, an inlet end of the cooling air extracting channel 230 is communicated with the fluid inlet 210 through a fluid distribution channel 250 extending along the second direction, an outlet end of the cooling air extracting channel 230 is communicated with the fluid outlet 220 through a fluid collection and discharge channel 260 extending along the second direction, the fluid distribution channel 250 is provided to facilitate uniform distribution of the cooling water to the plurality of cooling air extracting channels 230, and the fluid collection and discharge channel 260 is provided to facilitate collection and discharge of the cooling water in the plurality of cooling air extracting channels 230.

As shown in fig. 1 and 3, in the present embodiment, the gas exhaust channel includes a plurality of pumping condensation channels 44 arranged in parallel, and the cooling pumping channel 230 of the second heat exchanger plate 200 is at least partially opposite to the plurality of pumping condensation channels 44 in a direction perpendicular to the plate surface of the first heat exchanger plate 100, so that the arrangement of the plurality of pumping condensation channels 44 is beneficial to improving the heat transfer efficiency between the cooling water in the cooling pumping channel 230 and the steam in the gas exhaust channel.

The non-condensable gas pumped from the plurality of condensing channels 1 passes through the gas exhaust channel, and is then exhausted from the gas exhaust port of the first heat exchange plate 100, the specific arrangement of the gas exhaust channel may be set according to actual requirements, specifically, as shown in fig. 1 to 3, in this embodiment, the gas exhaust channel is located on one side of the plurality of condensing channels 1 in the second direction, the gas exhaust channel includes a main pumping channel 42, a main pumping condensation distribution channel 43, a main pumping condensation channel 44, and a main pumping condensation collection channel 45, the main pumping channel 42 extends along the first direction, and the main pumping channel 42 is communicated with one end of the plurality of pumping channels 41; the extracted air condensation distribution channel 43 extends along the second direction, and one end of the extracted air condensation distribution channel 43 is communicated with the extracted air main channel 42; the pumping condensation channels 44 extend along the first direction, a plurality of pumping condensation channels 44 are arranged in parallel along the second direction, and the inlets of the pumping condensation channels 44 are communicated with one end of the pumping condensation distribution channel 43 away from the pumping main channel 42; the pumping-air condensation collection passage 45 communicates the outlets of the plurality of pumping-air condensation passages 44 with the pumping-air ports. The arrangement of the gas discharge passage enables the structure of the first heat exchange plate 100 to be more compact, and is also beneficial to the gas-liquid separation in the gas discharge passage. The air suction opening of the first heat exchange plate 100 may be a hole disposed on the front surface of the first heat exchange plate 100 and penetrating through the first heat exchange plate 100; as shown in fig. 1, in this embodiment, the outlet end of the gas discharging channel (i.e. the pumping condensation collecting channel 45) penetrates through the side surface of the first heat exchanging plate 100 to form a pumping opening, and the arrangement of the pumping condensation collecting channel 45 is favorable for gathering the non-condensable gas in the gas discharging channel to the pumping opening, and the non-condensable gas is uniformly discharged from the pumping opening.

Non-condensable gas in the plurality of condensing channels 1 can be pumped out through the exhaust channel 4, but condensed water in the plurality of condensing channels 1 can be pumped out, and as described above, the cooling water in the cooling air pumping channel 230 of the second heat exchange plate 200 can exchange heat with the steam in the gas exhaust channel of the first heat exchange plate 100 for condensation, so that condensed water can be generated in the gas exhaust channel of the first heat exchange plate 100, as shown in fig. 1 and 3, in the present embodiment, the exhaust channel 4 further includes an exhaust condensed water exhaust channel 46, and the exhaust condensed water exhaust channel 46 is communicated with the gas exhaust channel and the water drain, so that the condensed water in the gas exhaust channel can flow to the water drain through the exhaust condensed water exhaust channel 46 for drainage. In the present embodiment, the first heat exchange plate 100 is provided with the condensed water collecting and discharging channel 3 to form the water outlet, so that the extracted condensed water discharging channel 46 is communicated with the water outlet by communicating with the condensed water collecting and discharging channel 3. In addition, in the present embodiment, the exhaust condensate discharge channel 46 is gradually retracted in the direction close to the water outlet, and the exhaust condensate discharge channel 46 is set as a tapered channel, which is beneficial for the condensed water in the gas discharge channel to be collected into the condensate collecting and discharging channel 3.

As shown in fig. 1 and 3, in the present embodiment, one end of the air extraction main channel 42 close to the outlets of the plurality of condensation channels 1 (i.e. the lower end of the air extraction main channel 42) is communicated with the water outlet through an air extraction condensate discharge channel 46, and the air extraction condensate discharge channel 46 is disposed at the lower end of the air extraction main channel 42, so as to facilitate the collection and discharge of the condensate water in the air discharge channel.

As described above, the steam in the condensation channel 1 of the first heat exchange plate 100 and the cooling water in the fluid channels 240 of the second heat exchange plate 200 can exchange heat to implement steam condensation, and when the cooling water in each fluid channel 240 of the second heat exchange plate 200 is unevenly distributed, local overheating in the fluid channel 240 is easily caused to cause pressure jump, and thus, an instantaneous reverse flow phenomenon occurs in the fluid channel 240. In order to distribute the cooling water entering from the fluid inlet 210 to the plurality of fluid channels 240 more uniformly, the inlets of the plurality of fluid channels 240 may be defined to be spaced from the fluid inlet 210 equally, so that the distance from the edge of the fluid inlet 210 to the inlet of each fluid channel 240 is equal, which is beneficial to distribute the cooling water entering from the fluid inlet 210 to the plurality of fluid channels 240 uniformly. The inlets of the plurality of fluid channels 240 are equally spaced from the fluid inlet 210, and may be all spaced from zero, that is, the inlets of the plurality of fluid channels 240 are directly communicated with the fluid inlet 210; as shown in fig. 4 and 7, in the present embodiment, inlets of the plurality of fluid channels 240 are spaced from the fluid inlet 210, and the distances between the inlets of the plurality of fluid channels 240 and the fluid inlet 210 are equal, an inlet fluid distribution groove 270 is formed on the plate surface of the second heat exchange plate 200 on which the fluid channels 240 are disposed, the inlet fluid distribution groove 270 is located between the fluid inlet 210 and the inlets of the plurality of fluid channels 240, and the fluid inlet 210 communicates with the inlets of the plurality of fluid channels 240 through the inlet fluid distribution groove 270. By the arrangement of the inlet fluid distribution groove 270, not only can the flow resistance near the fluid inlet 210 be reduced, but also the occurrence of macroscopic-scale vortexes near the fluid inlet 210, which causes uneven distribution of cooling water in each fluid passage 240, can be avoided.

As shown in fig. 7, in the present embodiment, the inlets of the plurality of fluid channels 240 are arranged around the fluid inlet 210, and by defining the arrangement of the inlets of the plurality of fluid channels 240, it is not only beneficial to control the distance between the inlets of the plurality of fluid channels 240 and the fluid inlet 210, but also beneficial to arrange the plurality of fluid channels 240 on the second heat exchange plate 200 more compactly, and increase the area ratio of the plurality of fluid channels 240 on the second heat exchange plate 200.

The cooling water can exchange heat in the plurality of fluid passages 240, and the specific shape of the fluid passages 240 is not particularly limited, for example, the fluid passages 240 may be linear passages extending along a straight line; the fluid channel 240 may be an arcuate channel extending along an arc; the fluid channel 240 may also be a wavy channel extending along a wavy line, or the like. Specifically, as shown in fig. 7, in the present embodiment, the fluid inlet 210 is spaced apart from the fluid outlet 220 in a first direction, and the fluid passage 240 includes an inlet section 241 near the fluid inlet 210, an outlet section 242 near the fluid outlet 220, and a heat exchange section 243 extending in the first direction and communicating the inlet section 241 and the outlet section 242; the heat exchange segments 243 of the plurality of fluid passages 240 are arranged side by side in the second direction, which facilitates increasing the area ratio of the plurality of fluid passages 240 on the second heat exchange plate 200 by defining the position relationship of the fluid inlets 210 and the fluid outlets 220 and the shape of the fluid passages 240, thereby improving the heat transfer efficiency of the second heat exchange plate 200.

Further, as shown in fig. 7, in the present embodiment, the plurality of fluid channels 240 includes a middle fluid channel and a plurality of side fluid channels respectively disposed at both sides of the middle fluid channel in the second direction, wherein: the inlet sections 241 of the plurality of lateral fluid channels are arranged in an arc-shaped channel and are bent to a greater degree farther away from the central fluid channel. The inlet section 241 is configured as an arc-shaped channel, and the cooling water can be uniformly guided into each fluid channel 240 by the coanda effect of the inner side wall of the arc-shaped channel on the fluid.

Similarly, as shown in FIG. 7, in the present embodiment, the outlet sections 242 of the plurality of side fluid channels are arranged in an arc-shaped channel and are bent to a greater extent farther away from the central fluid channel. The outlet section 242 is configured as an arc-shaped channel, and the fluid can be uniformly guided to the fluid outlet 220 by the coanda effect of the inner side wall of the arc-shaped channel on the fluid.

The cooling water flowing out from the outlets of the plurality of fluid passages 240 finally flows out from the fluid outlet 220, and in order to allow the cooling water to uniformly flow out from the fluid outlet 220, the outlets of the plurality of fluid passages 240 may be defined to be equally spaced from the fluid outlet 220, so that the distance from the edge of the fluid outlet 220 to the outlet of each fluid passage 240 is equal, which facilitates the uniform flow of the cooling water from the fluid outlet 220. The outlets of the plurality of fluid channels 240 are equally spaced from the fluid outlet 220, and may be all spaced from zero, that is, the outlets of the plurality of fluid channels 240 are directly communicated with the fluid outlet 220; as shown in fig. 7, in the present embodiment, the outlets of the plurality of fluid passages 240 are all spaced from the fluid outlet 220, and the distances between the outlets of the plurality of fluid passages 240 and the fluid outlet 220 are equal, the plate surface of the second heat exchange plate 200 on which the fluid passages 240 are disposed is provided with an outlet fluid collecting groove 280, the outlet fluid collecting groove 280 is located between the fluid outlet 220 and the outlets of the plurality of fluid passages 240, and the fluid outlet 220 communicates with the outlets of the plurality of fluid passages 240 through the outlet fluid collecting groove 280. The outlet fluid collecting groove 280 is provided to facilitate the cooling water flowing out from the outlets of the plurality of fluid channels 240 to be collected toward the fluid outlet 220 and to uniformly flow out from the fluid outlet 220.

As shown in fig. 7, in the present embodiment, the outlets of the plurality of fluid channels 240 are arranged around the fluid outlet 220, and the arrangement manner of the outlets defining the plurality of fluid channels 240 is not only beneficial to controlling the distance between the outlets of the plurality of fluid channels 240 and the fluid outlet 220, but also beneficial to arranging the plurality of fluid channels 240 on the second heat exchange plate 200 more compactly, and increasing the area ratio of the plurality of fluid channels 240 on the second heat exchange plate 200.

Also, in order to more uniformly distribute the cooling water entering from the fluid inlet 210 to the plurality of fluid channels 240, in the present embodiment, the channel length and the channel width of the plurality of fluid channels 240 are adapted so that the resistance of the plurality of fluid channels 240 to the forward flowing fluid is equal. Wherein forward is the direction from the inlet of the fluid channel 240 to the outlet of the fluid channel 240 and reverse is the direction from the outlet of the fluid channel 240 to the inlet of the fluid channel 240. While the channel length of the fluid channel 240 refers to the dimension of the fluid channel 240 in the extending direction of the fluid channel 240, and the channel width of the fluid channel 240 refers to the dimension of the fluid channel 240 in the direction perpendicular to the extending direction of the fluid channel 240. The resistance of the fluid channel 240 to the fluid is related to the channel length and the channel width of the fluid channel 240, and when the channel width of the fluid channel 240 is determined, the longer the channel length of the fluid channel 240 is, the greater the resistance of the fluid channel 240 to the fluid is, the shorter the channel length of the fluid channel 240 is, and the lower the resistance of the fluid channel 240 to the fluid is; in the case where the channel length of the fluid channel 240 is determined, the narrower the channel width of the fluid channel 240, the greater the resistance of the fluid channel 240 to the fluid, and the wider the channel width of the fluid channel 240, the smaller the resistance of the fluid channel 240 to the fluid. The channel length and the channel width of the plurality of fluid channels 240 may be adapted by using one of the plurality of fluid channels 240 as a reference fluid channel 240, and adjusting the channel lengths and/or the channel widths of the other fluid channels 240 to make the resistance of the plurality of fluid channels 240 to the fluid flowing in the forward direction equal, for example, when the channel length of any one of the other fluid channels 240 is longer than the channel length of the reference fluid channel 240, the channel width of the any one fluid channel 240 may be widened relative to the channel width of the reference fluid channel 240; when the channel length of any one of the other fluid channels 240 is shorter than the channel length of the reference fluid channel 240, the channel width of the any one fluid channel 240 may be reduced with respect to the channel width of the reference fluid channel 240. Since the resistance to the fluid flowing in the forward direction is equal for the plurality of fluid channels 240, the fluid entering from the fluid inlet 210 can be distributed more evenly to the plurality of fluid channels 240 as the fluid flows from the fluid inlet 210 to the fluid outlet 220. The second heat exchange plate 200 facilitates the fluid to be uniformly distributed to the plurality of fluid channels 240 by correspondingly arranging the channel length and the channel width of the plurality of fluid channels 240 such that the resistance of the plurality of fluid channels 240 to the fluid flowing in the forward direction is equal.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. A first heat exchange plate is characterized in that the first heat exchange plate is provided with a steam inlet and a water outlet, a plurality of condensation channels are arranged on one plate surface of the first heat exchange plate, and two ends of each condensation channel are respectively communicated with the steam inlet and the water outlet;

each condensing channel comprises a plurality of single-row channels and at least one multi-row channel which are connected in series, one multi-row channel is communicated between every two adjacent single-row channels, and the multi-row channel comprises a plurality of parallel branch channels;

the first heat exchange plate is provided with a steam inlet distribution channel on the plate surface provided with the condensation channel, the steam inlet distribution channel is communicated with inlets of the condensation channels, and the steam inlet distribution channel penetrates through the side surface of the first heat exchange plate in the direction far away from the inlets of the condensation channels to form the steam inlet;

the first heat exchange plate is provided with a condensed water collecting and discharging channel on the surface of the condensing channel, the condensed water collecting and discharging channel is communicated with a plurality of outlets of the condensing channel, and the condensed water collecting and discharging channel penetrates through the side surface of the first heat exchange plate in the direction away from the plurality of outlets of the condensing channel to form the water outlet.

2. The first heat exchange plate according to claim 1, wherein a first communication hole is formed in a bottom wall of the condensed water collecting and discharging channel, a first annular boss surrounding the first communication hole is convexly arranged on the bottom wall of the condensed water collecting and discharging channel, an end surface of the first annular boss is flush with a plate surface of the first heat exchange plate, the first communication hole is a circular hole, the first annular boss is an annular boss, and an outer diameter of the first annular boss is larger than twice of a diameter of the first communication hole; and/or the presence of a gas in the gas,

the bottom wall of the steam inlet distribution channel is provided with a second communicating hole, a second annular boss surrounding the second communicating hole is convexly arranged on the bottom wall of the steam inlet distribution channel, the end face of the second annular boss is flush with the plate surface of the first heat exchange plate, the second communicating hole is a round hole, the second annular boss is an annular boss, and the outer diameter of the second annular boss is larger than twice of the diameter of the second communicating hole.

3. A first heat exchange plate according to claim 1, wherein the single row of channels are rectilinear channels extending in a straight line; and/or the presence of a gas in the gas,

the branch channel is an arc-shaped channel with an arc line in the extending direction; and/or the presence of a gas in the gas,

the multi-row channel comprises two branch channels, the inlet side edges of the two branch channels on the side close to each other are connected, and the outlet side edges of the two branch channels on the side close to each other are connected.

4. The first heat exchange plate according to claim 1, wherein the first heat exchange plate is provided with a suction port, the first heat exchange plate is provided with an exhaust passage on a plate surface provided with the condensation passage, and the exhaust passage comprises a suction passage and a gas discharge passage;

the air pumping channel is communicated with the plurality of condensing channels, at least one end of the air pumping channel is provided with an outlet, and the gas discharge channel is communicated with the outlet of the air pumping channel and the air pumping hole.

5. The first heat exchange plate of claim 4, wherein the condensing channels extend in a first direction, a plurality of the condensing channels are arranged in parallel in a second direction, the pumping channel extends in the second direction and communicates with a single row of the plurality of condensing channels, the pumping channel is arranged in parallel in the first direction in a plurality, and wherein the first direction intersects the second direction.

6. The first heat exchange plate of claim 5, wherein the gas discharge channel is located at one side of the plurality of condensation channels in the second direction, the gas discharge channel comprising:

the air exhaust main channel extends along the first direction and is communicated with one end of the plurality of air exhaust channels;

the extracted air condensation distribution channel extends along the second direction, and one end of the extracted air condensation distribution channel is communicated with the extracted air main channel;

the extracted air condensing channels extend along the first direction, a plurality of extracted air condensing channels are arranged in parallel along the second direction, and inlets of the plurality of extracted air condensing channels are communicated with one end of the extracted air condensing distribution channel, which is far away from the extracted air main channel; and the number of the first and second groups,

and the air exhaust condensation collecting channel is communicated with the outlets of the air exhaust condensation channels and the air exhaust port.

7. The first heat exchange plate of claim 6, wherein an end of the suction manifold adjacent to the outlets of the plurality of condensing channels communicates with the drain outlet through a suction condensate drain channel.

8. A microchannel condenser comprising a first heat exchange plate according to any one of claims 1 to 7.

9. A microchannel condenser, comprising:

-a first heat exchanger plate according to any of claims 4-7;

the cooling air extraction channel and two ends of each fluid channel are respectively communicated with the fluid inlet and the fluid outlet; and the number of the first and second groups,

the second heat exchange plates and the first heat exchange plates are arranged in the shell in a stacked mode, the surface, provided with a fluid channel, of each second heat exchange plate and the surface, provided with a condensation channel, of each first heat exchange plate face the same direction, one first heat exchange plate is arranged between every two adjacent second heat exchange plates, and the shell is provided with a shell steam inlet, a shell water outlet, a shell air suction port, a shell fluid inlet and a shell fluid outlet which respectively correspond to a steam inlet, a water outlet and an air suction port of each first heat exchange plate and a fluid inlet and a fluid outlet of each second heat exchange plate;

the plurality of condensing channels of the first heat exchange plate are at least partially opposite to the plurality of fluid channels of the second heat exchange plate in a direction perpendicular to the plate surface of the first heat exchange plate, and the gas exhaust channel of the first heat exchange plate is at least partially opposite to the cooling air exhaust channel of the second heat exchange plate in a direction perpendicular to the plate surface of the first heat exchange plate.

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