Sandwich type condenser

Abstract

The invention relates to the technical field of heat exchange, and discloses a sandwich type condenser which comprises a shell, a condensing tube bundle set is fixedly arranged in the shell, a condensing agent inlet and outlet mechanism is fixedly installed at the top of the shell, and a steam inlet mechanism and a steam outlet mechanism are fixedly arranged on the left side of the shell. And by arranging the first corrugated plate and the second corrugated plate, the flow path of steam is effectively prolonged, and the condensation efficiency is improved. The condensation pipes are arranged in the inner cylinder in a triangular mode, under the same space size, the triangular arrangement can contain more condensation pipes, the heat transfer area is greatly increased, and the condensation efficiency of the device is further improved. According to the condenser, the baffle and the elastic element are arranged, so that condensate is in an intermittent flowing state, a pulse type flowing mode is formed in the condensation pipe and in an interlayer space between the outer barrel and the inner barrel, the stability of a boundary layer is effectively broken, and the condensation effect of the condenser is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange, in particular to a sandwich condenser. Background Art

[0002] As a key heat exchange device in the refrigeration system, the condenser can cool and condense the high-temperature and high-pressure gaseous refrigerant into liquid, and is widely used in air conditioning, refrigeration equipment, automotive air conditioning, industrial chemical processes and other fields. In the current context of energy shortages and stricter environmental protection requirements, improving the thermal efficiency of the condenser is of great significance, which can not only reduce energy consumption and operating costs, but also improve the performance and reliability of the entire system, thereby promoting the sustainable development of related industries.

[0003] A Chinese patent with publication number CN114705061A discloses a sandwich condenser, which adds a fully enclosed condensation chamber outer cavity on the basis of a traditional condensation chamber, so that a cooling interlayer is formed between the inner and outer cavities of the condenser. The cooling water in the spiral condenser tube cools the steam in the condensation chamber for the first time, then flows through the cooling interlayer, and cools the steam in the condensation chamber for the second time. Due to the fully enclosed structure of the condensation outer cavity, the contact area between the cooling water and the steam is greatly increased, so that the heat exchange efficiency, condensation efficiency, and steam recovery rate are significantly improved.

[0004] Compared with the traditional single-layer condenser, the cooling water in the sandwich condenser cools the high-temperature steam from both the inner and outer spaces, which greatly improves the condensation efficiency. However, the sandwich condenser has room for optimization in terms of heat exchange area and reducing flow dead zones to further improve the condensation efficiency. In view of this situation, we proposed a sandwich condenser. Summary of the invention

[0005] The object of the present invention is to provide a sandwich condenser to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a sandwich condenser, comprising a shell, a condenser tube bundle group is fixedly arranged inside the shell, a refrigerant inlet and outlet mechanism is fixedly installed on the top of the shell, a steam inlet mechanism and a steam outlet mechanism are fixedly arranged on the left side of the shell, a first connecting pipe and a second connecting pipe are fixedly connected to the top of the steam outlet mechanism, the other end of the first connecting pipe is fixedly connected to the bottom of the left side of the shell, and the other end of the second connecting pipe is fixedly connected to the top of the left side of the shell; The condenser tube bundle group includes a plurality of condenser tubes, which are arranged in a triangle. The surface of the condenser tubes is roughened, and four first corrugated plates and four second corrugated plates are provided on the surface. The four first corrugated plates and the four second corrugated plates are arranged at equal intervals from top to bottom.

[0007] Preferably, the first corrugated plate is circular as a whole, the corrugation shape of the first corrugated plate is a sine wave, and its surface is roughened. A plurality of first circular holes are opened on the surface of the first corrugated plate, and the first circular holes correspond one-to-one to the condenser tubes. The diameter of the first circular holes is larger than the outer diameter of the condenser tubes, and the outer diameter of the first corrugated plate is consistent with the inner diameter of the outer shell.

[0008] Preferably, the second corrugated plate is circular as a whole, the corrugation shape of the second corrugated plate is a sine wave, and its surface is roughened. A plurality of second circular holes are opened on the surface of the second corrugated plate, and the second circular holes correspond one-to-one to the condenser tubes. The diameter of the second circular holes is consistent with the outer diameter of the condenser tubes, and the outer diameter of the second corrugated plate is smaller than the inner diameter of the outer shell.

[0009] Preferably, the condenser inlet and outlet mechanism comprises an outer conical shell, an inner conical shell is fixedly arranged at the center position inside the outer conical shell, three connecting rods are fixedly connected to the inner wall of the outer conical shell, the three connecting rods are evenly arranged about the axis of the outer conical shell, one end of the three connecting rods away from the outer conical shell is fixedly connected to the outer surface of the inner conical shell, a conical hole is opened inside the inner conical shell, a spoiler assembly is fixedly arranged at the center position inside the inner conical shell, three fixing rods are fixedly connected to the inner wall of the inner conical shell, the three fixing rods are symmetrically arranged about the axis of the inner conical shell, one end of the three fixing rods away from the inner conical shell is fixedly connected to the bottom of the spoiler assembly, an upper orifice plate is fixedly connected to the bottom of the inner conical shell, the condenser tube passes through the upper orifice plate, and the top end thereof is flush with the top end of the upper orifice plate.

[0010] Preferably, the spoiler assembly comprises a fixed column and a plurality of spiral spoilers, the fixed column is conical at the top and cylindrical at the bottom, and the plurality of spiral spoilers are unevenly arranged along the cylindrical surface of the fixed column.

[0011] Preferably, the outer shell includes an outer cylinder, an inner cylinder is fixedly arranged in the middle position inside the outer cylinder, three support rods are fixedly connected to the top of the outer surface of the inner cylinder, the ends of the three support rods away from the inner cylinder are fixedly connected to the inner wall of the outer cylinder, the top of the inner cylinder is flush with the top of the outer cylinder, the bottom end of the inner cylinder is higher than the bottom end surface inside the outer cylinder, the right end of the first connecting tube passes through the outer cylinder and the inner cylinder and is connected to the inside of the inner cylinder, the right end of the second connecting tube passes through the outer cylinder and the inner cylinder and is connected to the inside of the inner cylinder, a lower orifice plate is fixedly connected to the inside of the inner cylinder near the bottom, the lower end of the condensation tube passes through the lower orifice plate, and the bottom end thereof is flush with the bottom end of the lower orifice plate.

[0012] Preferably, a baffle is slidably connected to the inner cylinder near the bottom, the top of the baffle is conical, and the bottom is cylindrical, the baffle is located directly below the lower orifice plate, an elastic element is fixedly arranged between the bottom of the baffle and the inner bottom end surface of the outer cylinder, the top of the elastic element is fixedly connected to the bottom of the baffle, and the bottom of the elastic element is fixedly connected to the inner bottom end surface of the outer cylinder, and when the elastic element is in a free state, the bottom of the baffle is higher than the bottom of the inner cylinder.

[0013] Preferably, the steam inlet mechanism includes an inlet joint, the right end of which passes through the outer cylinder and the inner cylinder, the inlet joint is higher than the first corrugated plate at the top, the right end of the inlet joint is fixedly connected to a flow equalizing plate, a variable-section hole with a gradually decreasing cross-section is provided inside the inlet joint, a plurality of mounting holes are provided on the flow equalizing plate, the inner wall of the mounting hole is fixedly installed on the outer surface of the condenser, the mounting holes correspond one-to-one to the condenser, a plurality of spray holes are provided at the bottom of the flow equalizing plate, and the plurality of spray holes are connected to the variable-section hole.

[0014] Preferably, the steam outlet mechanism includes a mounting cylinder, a steam outlet and a steam inlet are provided on the top of the mounting cylinder in sequence from left to right, the steam inlet is connected to an end of the first connecting tube away from the outer cylinder, the steam outlet is connected to an end of the second connecting tube away from the outer cylinder, a separation cylinder is fixedly arranged in the middle position inside the mounting cylinder, the top of the separation cylinder is fixedly connected to the top end inside the mounting cylinder, a metal wire mesh is fixedly connected to the bottom of the separation cylinder, a first conical guide plate is fixedly connected to the inner wall of the mounting cylinder, a second conical guide plate is fixedly connected to the bottom end of the mounting cylinder, the first conical guide plate is located below the separation cylinder, the top of the second conical guide plate is higher than the bottom end of the first conical guide plate, a liquid outlet is fixedly connected to the mounting cylinder, the liquid outlet passes through the mounting cylinder and is connected to the inside of the mounting cylinder, and the liquid outlet is located at the left end of the second conical guide plate.

[0015] Preferably, the inner wall of the separation cylinder is provided with a plurality of microgrooves, the microgrooves have a depth of 50 μm and a spacing of 0.5 mm, the microgrooves extend along the axis of the separation cylinder and penetrate the separation cylinder, and the plurality of microgrooves are evenly arranged about the axis of the microgrooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The sandwich condenser, by setting the first corrugated plate and the second corrugated plate, the steam flows between the first corrugated plate and the second corrugated plate, effectively extending the flow path of the steam, greatly increasing the contact time with the condenser tube, thereby creating more sufficient conditions for heat exchange, thereby improving the condensation efficiency. At the same time, due to the special shape of the first corrugated plate and the second corrugated plate, the steam presents a wave-like motion trajectory when flowing between them. This unique flow mode triggers periodic disturbances, the steam forms a turbulent state, destroys the laminar boundary layer, and further improves the condensation efficiency.

[0017] 2. The sandwich condenser is provided with condensing tubes, which are arranged in a triangular shape in the inner tube. Under the same spatial dimensions, the triangular arrangement can accommodate a larger number of condensing tubes, greatly increasing the heat transfer area, which not only saves space but also further improves the condensing efficiency of the device.

[0018] 3. The sandwich condenser is provided with baffles and elastic elements, which work together to make the condensate flow intermittently, thereby forming a pulse flow pattern in the condenser tube and in the sandwich space between the outer tube and the inner tube, effectively breaking the stability of the boundary layer, and enhancing the heat exchange efficiency between the condensate and the tube wall, thereby further improving the condensation effect of the condenser. In addition, the pulse flow can also reduce the flow resistance of the condensate in the condenser tube and in the sandwich space between the outer tube and the inner tube, thereby reducing energy consumption.

[0019] 4. The sandwich condenser is provided with a condensing agent inlet and outlet mechanism, and a conical hole is opened inside the inner conical shell. The conical hole can initially distribute and guide the condensate entering the inner conical shell, so that the condensate can enter the subsequent condensation tube more evenly, thereby improving the condensation efficiency. The spiral spoiler will guide and disturb the condensate, breaking the laminar flow state of the condensate, enhancing the heat transfer effect between the condensate and the steam, and further improving the condensation efficiency.

[0020] 5. The sandwich condenser is provided with a steam outlet mechanism, and the liquefied steam adheres to the inner wall of the separation tube and the metal wire mesh, and flows out from the liquid outlet due to gravity. The uncondensed steam is guided by the first conical guide plate and flows back from the second connecting pipe to the top of the condensation tube bundle group for secondary condensation, thereby further improving the condensation efficiency.

[0021] 6. The sandwich condenser is provided with a steam inlet mechanism, and the steam flows into the flow plate through the variable cross-section hole, the steam flow rate is accelerated and the pressure is reduced. According to the principle of thermodynamics, this state prompts the steam to quickly release latent heat, thereby triggering the formation of condensation nuclei and accelerating condensation. The steam is evenly ejected through the spray hole, the flow rate is slowed down, and the steam is evenly distributed between the condensation tubes, avoiding the formation of dead zones and improving the condensation efficiency. The necking section accelerates the steam flow to promote initial condensation, and the expanding section reduces the flow rate to extend the heat exchange time, thereby improving the condensation efficiency as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the structure of the condenser tube bundle group of the present invention; Figure 4This is a schematic diagram of the structure of the first corrugated plate and the second corrugated plate of the present invention; Figure 5 This is a cross-sectional view of the condensing agent inlet and outlet mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the spoiler assembly of the present invention; Figure 7 This is a schematic diagram of the housing structure of the present invention; Figure 8 is a cross-sectional view of the bottom of the housing of the present invention; Fig. 9 This is a schematic diagram of the steam inlet mechanism structure of the present invention; Fig.10 It is a cross-sectional view of the steam outlet mechanism of the present invention.

[0023] In the figure: 1, outer shell; 101, outer cylinder; 102, inner cylinder; 103, support rod; 104, lower hole plate; 105, baffle; 106, elastic element; 2. Condenser tube bundle group; 201. Condenser tube; 202. First corrugated plate; 203. Second corrugated plate; 204. First circular hole; 205. Second circular hole; 3. condensing agent inlet and outlet mechanism; 301. outer conical shell; 302. inner conical shell; 303. connecting rod; 304. spoiler assembly; 3041. fixing column; 3042. spiral spoiler; 305. fixing rod; 306. upper orifice plate; 307. conical hole; 4. Steam inlet mechanism; 401. Inlet joint; 402. Flow equalizing plate; 403. Variable cross-section hole; 404. Mounting hole; 405. Spray hole; 5. Steam outlet mechanism; 501. Mounting cylinder; 502. Separation cylinder; 503. Metal mesh; 504. First conical guide plate; 505. Second conical guide plate; 506. Liquid outlet; 507. Steam inlet; 508. Steam outlet; 509. Micro groove; 6. First connecting pipe; 7. Second connecting pipe. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] For example, see Figure 1-4The present invention provides a technical solution: a sandwich condenser, comprising a shell 1, a condenser tube bundle group 2 is fixedly arranged inside the shell 1, a condenser inlet and outlet mechanism 3 is fixedly installed on the top of the shell 1, a steam inlet mechanism 4 and a steam outlet mechanism 5 are fixedly arranged on the left side of the shell 1, a first connecting pipe 6 and a second connecting pipe 7 are fixedly connected to the top of the steam outlet mechanism 5, the other end of the first connecting pipe 6 is fixedly connected to the bottom of the left side of the shell 1, and the other end of the second connecting pipe 7 is fixedly connected to the top of the left side of the shell 1; The condenser tube bundle group 2 includes a plurality of condensers 201, which are made of stainless steel. The internal condensate and the external steam are heat exchanged through the tube wall of the condenser tube 201 to achieve steam condensation. The plurality of condensers 201 are arranged in a triangular shape. The condenser tubes 201 are arranged in a triangular shape in the inner tube 102. Under the same spatial dimensions, the triangular arrangement can accommodate a larger number of condensers 201, greatly increasing the heat transfer area, which not only saves space but also further improves the condensation efficiency of the device. The surface of the condenser tube 201 is roughened to promote turbulence generation through surface roughness, reduce boundary layer thickness, and improve condensation efficiency. Four first corrugated plates 202 and four second corrugated plates 203 are provided on its surface.

[0026] The first corrugated plate 202 is circular as a whole, and the corrugation shape of the first corrugated plate 202 is a sine wave. Its surface is roughened, and a plurality of first circular holes 204 are opened on the surface of the first corrugated plate 202. The first circular holes 204 correspond to the condenser tubes 201 one by one. The diameter of the first circular holes 204 is larger than the outer diameter of the condenser tubes 201. The outer diameter of the first corrugated plate 202 is consistent with the inner diameter of the outer shell 1.

[0027] The second corrugated plate 203 is circular as a whole, and the corrugation shape of the second corrugated plate 203 is a sine wave. Its surface is roughened, and a plurality of second circular holes 205 are opened on the surface of the second corrugated plate 203. The second circular holes 205 correspond to the condenser tubes 201 one by one. The diameter of the second circular holes 205 is consistent with the outer diameter of the condenser tubes 201. The outer diameter of the second corrugated plate 203 is smaller than the inner diameter of the outer shell 1.

[0028] The four first corrugated plates 202 and the four second corrugated plates 203 are arranged at equal intervals from top to bottom. The steam flows between the first corrugated plates 202 and the second corrugated plates 203, which effectively extends the flow path of the steam and greatly increases the contact time with the condenser tube 201, thereby creating more sufficient conditions for heat exchange and improving the condensation efficiency. At the same time, due to the special shapes of the first corrugated plates 202 and the second corrugated plates 203, the steam presents a wave-like motion trajectory when flowing between them. This unique flow mode triggers periodic disturbances, and the steam forms a turbulent state, destroying the laminar boundary layer, further improving the condensation efficiency.

[0029] Working principle: Steam enters the first corrugated plate 202 at the top from the steam inlet mechanism 4. Since the diameter of the first circular hole 204 is larger than the outer diameter of the condenser tube 201, and the outer diameter of the first corrugated plate 202 is the same as the inner diameter of the shell 1, the steam flows downward from the gap between the first circular hole 204 and the condenser tube 201. Since the diameter of the second circular hole 205 is the same as the outer diameter of the condenser tube 201, and the outer diameter of the second corrugated plate 203 is smaller than the inner diameter of the shell 1, the steam flows from the gap between the first circular hole 204 of the first corrugated plate 202 at the top and the condenser tube 201 to the gap between the second corrugated plate 203 and the inner tube 102 below. Then, the steam flows from the gap between the second corrugated plate 203 and the inner tube 102 into the gap between the first circular hole 204 of the first corrugated plate 202 below and the condenser tube 201, and so on and so forth, extending the flow path of the steam. At the same time, the steam flows along the wavy surfaces of the first corrugated plate 202 and the second corrugated plate 203, forming a turbulent state, destroying the laminar boundary layer, and further improving the condensation efficiency.

[0030] Embodiment 2, the difference between embodiment 1 and embodiment 2 is as follows: Figure 5-6 The condensing agent inlet and outlet mechanism 3 includes an outer conical shell 301, an inner conical shell 302 is fixedly arranged at the center position inside the outer conical shell 301, and a conical condensate outlet is formed between the outer conical shell 301 and the inner conical shell 302, so that the condensate flows out evenly from there, avoiding the generation of a dead zone. Three connecting rods 303 are fixedly connected to the inner wall of the outer conical shell 301, and the three connecting rods 303 are evenly arranged about the axis of the outer conical shell 301. One end of the three connecting rods 303 away from the outer conical shell 301 is fixedly connected to the outer surface of the inner conical shell 302, and a conical hole 307 is opened inside the inner conical shell 302. The conical hole 307 can perform preliminary distribution and guidance of the condensate entering the inner conical shell 302, so that the condensate can enter the subsequent condensation tube 201 more evenly, thereby improving the condensation efficiency. A spoiler assembly 304 is fixedly arranged at the center of the inner conical shell 302, and three fixing rods 305 are fixedly connected to the inner wall of the inner conical shell 302. The three fixing rods 305 are symmetrically arranged about the axis of the inner conical shell 302, and one end of the three fixing rods 305 away from the inner conical shell 302 is fixedly connected to the bottom of the spoiler assembly 304. An upper orifice plate 306 is fixedly connected to the bottom of the inner conical shell 302. The upper orifice plate 306 is used to separate the condensate of the inner conical shell 302 from the steam in the inner cylinder 102, and at the same time plays a role in fixing the condenser tube 201. The condenser tube 201 passes through the upper orifice plate 306, and its top end is flush with the top end of the upper orifice plate 306.

[0031] The spoiler assembly 304 includes a fixed column 3041 and a plurality of spiral spoilers 3042. The fixed column 3041 is conical at the top and cylindrical at the bottom. The plurality of spiral spoilers 3042 are unevenly arranged along the cylindrical surface of the fixed column 3041. The spiral spoilers 3042 guide and disturb the condensate, breaking the laminar flow state of the condensate, enhancing the heat transfer effect between the condensate and the steam, and further improving the condensation efficiency.

[0032] Working principle: The condensate enters from the top inlet of the inner conical shell 302 and flows through the tapered hole 307 axially. In this process, the cross-sectional area of ​​the flow channel gradually expands, which makes the condensate evenly distributed and smoothly introduced into the inner cavity of the inner conical shell 302, and then evenly enters the subsequent condenser tube 201, thereby improving the condensation efficiency. When the condensate contacts the surface of the spiral spoiler 3042, guided by its specific geometric structure, the fluid motion state changes from the initial laminar flow mode to high-intensity turbulence. This flow state change greatly increases the radial mixing of fluid particles, effectively destroys the thermal boundary layer, and improves the condensation efficiency.

[0033] Embodiment 3, the difference between embodiment 1 and embodiment 1 is as follows: Figure 7-8 The outer shell 1 includes an outer cylinder 101, and an inner cylinder 102 is fixedly arranged in the middle position inside the outer cylinder 101. The inner cylinder 102 is used to accommodate the condensation tube bundle group 2. The space between the inner cylinder 102 and the condensation tube bundle group 2 is used for steam flow. An interlayer is formed between the inner cylinder 102 and the outer cylinder 101. The condensate flows through this interlayer and exchanges heat with the steam inside the inner cylinder 102, thereby improving the condensation efficiency. Three support rods 103 are fixedly connected to the top of the outer surface of the inner cylinder 102. One end of the three support rods 103 away from the inner cylinder 102 is fixedly connected to the inner wall of the outer cylinder 101. The top of the inner cylinder 102 is flush with the top of the outer cylinder 101, and the bottom of the inner cylinder 102 is higher than the bottom end surface of the outer cylinder 101. The condensate flows from the bottom of the inner cylinder 102 into the interlayer between the outer cylinder 101 and the inner cylinder 102. The right end of the first connecting pipe 6 penetrates the outer tube 101 and the inner tube 102 and communicates with the inner tube 102. The right end of the second connecting pipe 7 penetrates the outer tube 101 and the inner tube 102 and communicates with the inner tube 102. A lower orifice plate 104 is fixedly connected to the inner tube 102 near the bottom. The lower orifice plate 104 is used to separate the condensate at the bottom of the outer tube 101 from the steam in the inner tube 102 and also plays a role in fixing the condenser 201. The lower end of the condenser 201 penetrates the lower orifice plate 104, and its bottom end is flush with the bottom end of the lower orifice plate 104.

[0034] A baffle 105 is slidably connected near the bottom of the inner tube 102. The top of the baffle 105 is conical and the bottom is cylindrical. The baffle 105 is located directly below the lower orifice plate 104. An elastic element 106 is fixedly arranged between the bottom of the baffle 105 and the bottom end surface of the inner tube 101. The top of the elastic element 106 is fixedly connected to the bottom of the baffle 105, and the bottom of the elastic element 106 is fixedly connected to the bottom end surface of the inner tube 101. The elastic element 106 is in a free state, and the bottom of the baffle 105 is higher than the bottom of the inner tube 102. The baffle 105 and the elastic element 106 work together to cause the condensate to flow intermittently, thereby forming a pulse flow pattern in the condenser tube 201 and in the interlayer space between the outer tube 101 and the inner tube 102, effectively breaking the stability of the boundary layer, and strengthening the heat exchange efficiency between the condensate and the tube wall, thereby further improving the condensation effect of the condenser. In addition, the pulse flow can also reduce the flow resistance of the condensate in the condenser tube 201 and in the interlayer between the outer tube 101 and the inner tube 102, thereby reducing energy consumption.

[0035] Working principle: The condensing agent flows into the condensing tube 201 from the condensing agent inlet and outlet mechanism 3, and the steam flows from the top to the bottom of the outer tube 101. The steam exchanges heat with the condensing agent through the condensing tube 201 to achieve condensation. When the condensate flows out of the condensing tube 201, the baffle 105 blocks the condensate from continuing to flow downward. As the pressure of the condensate on the baffle 105 increases, the elastic element 106 is compressed downward, and the baffle 105 moves downward so that its height is lower than the bottom of the inner tube 102. The condensate continues to flow from the bottom of the inner tube 102 into the interlayer between the outer tube 101 and the inner tube 102, and then flows out of the device from the gap between the outer conical shell 301 and the inner conical shell 302. As the condensate flows, the pressure on the baffle 105 decreases, and the elastic element 106 pushes the baffle 105 to reset upward to block the gap between the bottom of the outer tube 101 and the bottom of the inner tube 102, so that the condensate stops flowing. This reciprocating process causes the condensate to flow intermittently, thereby forming a pulsed flow pattern inside the condenser tube 201 and in the interlayer space between the outer tube 101 and the inner tube 102, effectively breaking the stability of the boundary layer and enhancing the heat exchange efficiency between the condensate and the tube wall.

[0036] Embodiment 4, the difference between embodiment 1 and embodiment 1 is as follows: Fig. 9The steam inlet mechanism 4 includes an inlet joint 401, which is used to introduce external steam into the device. The right end of the inlet joint 401 penetrates the outer tube 101 and the inner tube 102. The inlet joint 401 is higher than the first corrugated plate 202 at the top. The right end of the inlet joint 401 is fixedly connected to a flow equalizing plate 402, which is made of copper to increase its thermal conductivity. A variable cross-section hole 403 with a gradually decreasing cross-section is provided inside the inlet joint 401. A plurality of mounting holes 404 are provided on the flow equalizing plate 402. The inner wall of the mounting hole 404 is fixedly installed with the outer surface of the condenser 201. The mounting hole 404 corresponds to the condenser 201 one by one. A plurality of spray holes 405 are provided at the bottom of the flow equalizing plate 402, and the plurality of spray holes 405 are connected to the variable cross-section hole 403. Steam flows into the flow equalizing plate 402 through the variable cross-section hole 403, and the steam flow rate is accelerated and the pressure is reduced. According to the principle of thermodynamics, this state prompts the steam to quickly release latent heat, thereby triggering the formation of condensation nuclei and accelerating condensation. The steam is uniformly ejected through the spray hole 405, and the flow rate is slowed down. The steam is evenly distributed between the condensing tubes 201, avoiding the formation of dead zones and improving the condensation efficiency. The necking section accelerates the steam flow to promote initial condensation, and the expanding section reduces the flow rate to extend the heat exchange time, thereby improving the condensation efficiency as a whole.

[0037] Working principle: When external steam enters the inlet joint 401 and passes through the variable cross-section hole 403, the cross-sectional area gradually decreases, the steam flow rate increases, and the pressure decreases. The high-speed steam enters the flow equalizing plate 402 to exchange heat with the condensate in the condenser tube 201. The high-speed and low-pressure state prompts the steam to quickly release latent heat, thereby triggering the formation of condensation nuclei and accelerating condensation. The steam is evenly ejected through the spray hole 405, the cross-section becomes larger, the flow rate slows down, and the heat exchange time is extended. The necking section accelerates the steam flow to promote initial condensation, and the expansion section reduces the flow rate to extend the heat exchange time, thereby improving the condensation efficiency as a whole. The steam is evenly ejected through the spray hole 405 and evenly distributed between the condenser tubes 201 to avoid the formation of dead zones and improve the condensation efficiency.

[0038] Embodiment 5, the difference between embodiment 1 and embodiment 1 is as follows: Fig.10The steam outlet mechanism 5 includes a mounting cylinder 501, and a steam outlet 508 and a steam inlet 507 are sequentially provided on the top of the mounting cylinder 501 from left to right. The steam inlet 507 is communicated with the end of the first connecting pipe 6 away from the outer cylinder 101, and the steam outlet 508 is communicated with the end of the second connecting pipe 7 away from the outer cylinder 101. A separation cylinder 502 is fixedly arranged at the middle position inside the mounting cylinder 501, and the top of the separation cylinder 502 is fixedly connected to the top of the mounting cylinder 501, and a metal wire mesh 503 is fixedly connected to the bottom of the separation cylinder 502. The liquefied steam adheres to the inner wall of the separation cylinder 502 and the metal wire mesh 503, and flows out from the liquid outlet 506 due to gravity, thereby realizing gas-liquid separation. The uncondensed steam is guided by the first conical guide plate 504 to flow from the second connecting pipe 7 back to the top of the condensation tube bundle group 2 for secondary condensation, thereby further improving the condensation efficiency. A first conical guide plate 504 is fixedly connected to the inner wall of the mounting cylinder 501, a second conical guide plate 505 is fixedly connected to the bottom end of the interior of the mounting cylinder 501, the first conical guide plate 504 is located below the separation cylinder 502, the top of the second conical guide plate 505 is higher than the bottom end of the first conical guide plate 504, a liquid outlet 506 is fixedly connected to the mounting cylinder 501, the liquid outlet 506 passes through the mounting cylinder 501 and is connected to the interior of the mounting cylinder 501, and the liquid outlet 506 is located at the left end of the second conical guide plate 505.

[0039] The inner wall of the separation cylinder 502 is provided with a plurality of microgrooves 509, each of which has a depth of 50 μm and a spacing of 0.5 mm. The microgrooves 509 extend along the axis of the separation cylinder 502 and penetrate the separation cylinder 502, and the plurality of microgrooves 509 are evenly arranged about the axis of the microgrooves 509. The microgrooves 509 make it easier for the liquid to adhere to the inner wall of the separation cylinder 502, thereby improving the gas-liquid separation effect.

[0040] Working principle: The condensed steam flows into the separation cylinder 502 from the bottom of the inner cylinder 102 through the first connecting pipe 6. When the condensed steam passes through the inner wall of the separation cylinder 502 and the metal wire mesh 503, it will adhere to its surface, and then drip into the second conical guide plate 505 due to gravity. When the second conical guide plate 505 is full of liquid, the steam liquid will flow from the top of the second conical guide plate 505 to the liquid outlet 506, and finally flow out from the liquid outlet 506. After the incompletely condensed steam flows out of the separation cylinder 502, it is guided upward by the first conical guide plate 504 and flows out from the steam outlet 508, and then flows back to the top of the condensation tube bundle group 2 through the second connecting pipe 7 for secondary condensation, further improving the condensation efficiency.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sandwich condenser, comprising a housing (1), characterized in that: A condenser tube bundle group (2) is fixedly arranged inside the shell (1), a condenser inlet and outlet mechanism (3) is fixedly installed on the top of the shell (1), a steam inlet mechanism (4) and a steam outlet mechanism (5) are fixedly arranged on the left side of the shell (1), a first connecting pipe (6) and a second connecting pipe (7) are fixedly connected to the top of the steam outlet mechanism (5), the other end of the first connecting pipe (6) is fixedly connected to the bottom of the left side of the shell (1), and the other end of the second connecting pipe (7) is fixedly connected to the top of the left side of the shell (1); The condenser tube bundle group (2) comprises a plurality of condenser tubes (201), the plurality of condenser tubes (201) are arranged in a triangle, the surface of the condenser tube (201) is roughened, and four first corrugated plates (202) and four second corrugated plates (203) are sleeved on the surface, and the four first corrugated plates (202) and the four second corrugated plates (203) are arranged in sequence with equal intervals from top to bottom.

2. A sandwich condenser according to claim 1, characterized in that: The first corrugated plate (202) is generally circular, the corrugation shape of the first corrugated plate (202) is a sine wave, and its surface is roughened. A plurality of first circular holes (204) are provided on the surface of the first corrugated plate (202), the first circular holes (204) correspond one-to-one to the condenser tubes (201), the diameter of the first circular holes (204) is larger than the outer diameter of the condenser tubes (201), and the outer diameter of the first corrugated plate (202) is consistent with the inner diameter of the outer shell (1).

3. A sandwich condenser according to claim 1, characterized in that: The second corrugated plate (203) is generally circular, the corrugation shape of the second corrugated plate (203) is a sine wave, and its surface is roughened. A plurality of second circular holes (205) are provided on the surface of the second corrugated plate (203), the second circular holes (205) correspond one-to-one to the condenser tubes (201), the diameter of the second circular holes (205) is consistent with the outer diameter of the condenser tubes (201), and the outer diameter of the second corrugated plate (203) is smaller than the inner diameter of the outer shell (1).

4. The sandwich condenser according to claim 1, characterized in that: The condensing agent inlet and outlet mechanism (3) comprises an outer conical shell (301), an inner conical shell (302) is fixedly arranged at a central position inside the outer conical shell (301), three connecting rods (303) are fixedly connected to the inner wall of the outer conical shell (301), the three connecting rods (303) are evenly arranged about the axis of the outer conical shell (301), one end of the three connecting rods (303) away from the outer conical shell (301) is fixedly connected to the outer surface of the inner conical shell (302), a conical hole (307) is opened inside the inner conical shell (302), and the inner conical shell ( A spoiler assembly (304) is fixedly arranged at the inner center position of the inner conical shell (302), and three fixing rods (305) are fixedly connected to the inner wall of the inner conical shell (302). The three fixing rods (305) are symmetrically arranged about the axis of the inner conical shell (302), and one end of the three fixing rods (305) away from the inner conical shell (302) is fixedly connected to the bottom of the spoiler assembly (304), and an upper orifice plate (306) is fixedly connected to the bottom of the inner conical shell (302), and the condenser tube (201) passes through the upper orifice plate (306), and its top end is flush with the top end of the upper orifice plate (306).

5. A sandwich condenser according to claim 4, characterized in that: The spoiler assembly (304) comprises a fixed column (3041) and a plurality of spiral spoiler pieces (3042); the fixed column (3041) has a conical top and a cylindrical bottom; and the plurality of spiral spoiler pieces (3042) are unevenly arranged along the cylindrical surface of the fixed column (3041).

6. The sandwich condenser according to claim 1, characterized in that: The outer shell (1) comprises an outer cylinder (101), an inner cylinder (102) is fixedly arranged in the middle position inside the outer cylinder (101), three support rods (103) are fixedly connected to the top of the outer surface of the inner cylinder (102), one end of the three support rods (103) away from the inner cylinder (102) is fixedly connected to the inner wall of the outer cylinder (101), the top end of the inner cylinder (102) is flush with the top end of the outer cylinder (101), and the bottom end of the inner cylinder (102) is higher than the outer cylinder (101). On the inner bottom end surface, the right end of the first connecting tube (6) passes through the outer tube (101) and the inner tube (102) and is connected to the inner tube (102); the right end of the second connecting tube (7) passes through the outer tube (101) and the inner tube (102) and is connected to the inner tube (102); a lower orifice plate (104) is fixedly connected to the inner tube (102) near the bottom; the lower end of the condensing tube (201) passes through the lower orifice plate (104), and its bottom end is flush with the bottom end of the lower orifice plate (104).

7. A sandwich condenser according to claim 6, characterized in that: A baffle (105) is slidably connected to the inner cylinder (102) near the bottom. The top of the baffle (105) is conical and the bottom is cylindrical. The baffle (105) is located directly below the lower perforated plate (104). An elastic element (106) is fixedly arranged between the bottom of the baffle (105) and the bottom end surface of the inner cylinder (101). The top of the elastic element (106) is fixedly connected to the bottom of the baffle (105), and the bottom of the elastic element (106) is fixedly connected to the bottom end surface of the inner cylinder (101). When the elastic element (106) is in a free state, the bottom of the baffle (105) is higher than the bottom of the inner cylinder (102).

8. The sandwich condenser according to claim 1, characterized in that: The steam inlet mechanism (4) comprises an inlet joint (401), the right end of which passes through the outer tube (101) and the inner tube (102), the inlet joint (401) being higher than the first corrugated plate (202) at the top, the right end of which is fixedly connected to a flow equalizing plate (402), the inlet joint (401) being provided with a variable cross-section hole (403) with a gradually decreasing cross-section inside, the flow equalizing plate (402) being provided with a plurality of mounting holes (404), the inner wall of the mounting hole (404) being fixedly mounted to the outer surface of the condenser (201), the mounting hole (404) corresponding to the condenser (201) one by one, the bottom of the flow equalizing plate (402) being provided with a plurality of spray holes (405), the plurality of spray holes (405) being connected to the variable cross-section hole (403).

9. The sandwich condenser according to claim 1, characterized in that: The steam outlet mechanism (5) comprises a mounting cylinder (501), the top of the mounting cylinder (501) being provided with a steam outlet (508) and a steam inlet (507) in sequence from left to right, the steam inlet (507) being connected to an end of the first connecting pipe (6) away from the outer cylinder (101), the steam outlet (508) being connected to an end of the second connecting pipe (7) away from the outer cylinder (101), a separation cylinder (502) being fixedly arranged in the middle of the mounting cylinder (501), the top of the separation cylinder (502) being fixedly connected to the top of the mounting cylinder (501), and the bottom of the separation cylinder (502) being fixedly connected to a metal wire mesh ( 503), a first conical guide plate (504) is fixedly connected to the inner wall of the mounting tube (501), a second conical guide plate (505) is fixedly connected to the bottom end of the interior of the mounting tube (501), the first conical guide plate (504) is located below the separation tube (502), the top end of the second conical guide plate (505) is higher than the bottom end of the first conical guide plate (504), the mounting tube (501) is fixedly connected to a liquid outlet (506), the liquid outlet (506) passes through the mounting tube (501) and is connected to the interior of the mounting tube (501), and the liquid outlet (506) is located at the left end of the second conical guide plate (505).

10. The sandwich condenser according to claim 9, characterized in that: The inner wall of the separation barrel (502) is provided with a plurality of microgrooves (509), each of which has a depth of 50 μm and a spacing of 0.5 mm. The microgrooves (509) extend along the axis of the separation barrel (502) and penetrate the separation barrel (502), and the plurality of microgrooves (509) are evenly arranged about the axis of the microgrooves (509).

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