WO2024060347A1 - Plate heat exchanger - Google Patents

Plate heat exchanger Download PDF

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Publication number
WO2024060347A1
WO2024060347A1 PCT/CN2022/126560 CN2022126560W WO2024060347A1 WO 2024060347 A1 WO2024060347 A1 WO 2024060347A1 CN 2022126560 W CN2022126560 W CN 2022126560W WO 2024060347 A1 WO2024060347 A1 WO 2024060347A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
plate
heat exchange
chamber
inlet
Prior art date
Application number
PCT/CN2022/126560
Other languages
French (fr)
Chinese (zh)
Inventor
刘斌
金子洋
王丰
Original Assignee
浙江英特科技股份有限公司
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Application filed by 浙江英特科技股份有限公司 filed Critical 浙江英特科技股份有限公司
Publication of WO2024060347A1 publication Critical patent/WO2024060347A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates

Definitions

  • the invention relates to the field of heat exchange equipment, and in particular to a plate heat exchanger.
  • plate heat exchangers have been widely used in refrigeration industry, air conditioning industry, heat pump system industry, heat treatment industry, petrochemical industry, energy industry, waste heat recovery industry and other industries.
  • Plate heat exchangers are constructed and work by using metal sheets that have a corrugated pattern and are stacked together. Multiple fluid channels are formed between the metal sheets, so that heat can be exchanged between two fluids (such as liquid to liquid or liquid to steam) according to the heat transfer characteristics of the metal sheets to achieve the purpose of heating or cooling.
  • This plate heat exchanger has the advantages of compact structure, high heat transfer efficiency, small size, and easy maintenance and inspection.
  • the plate heat exchanger recorded in the Chinese utility model patent text with the announcement number "CN2821502Y", which includes a front outer baffle, a rear outer baffle, and a plate heat exchanger arranged between the front outer baffle and the rear outer baffle.
  • the heat exchanger is realized with the refrigerant on both sides of the corrugated plate.
  • the fluid of the plate heat exchanger is usually a two-phase mixed fluid, such as a mixed fluid of liquid and steam, rather than a single-phase fluid.
  • the inertial force and gravity of liquid are greater than that of steam (such as refrigerant gas), and the momentum of liquid is much greater than the momentum of steam. Therefore, the rear end of the plate heat exchanger, which causes most of the liquid to flow forward to the inlet channel, is away from the inlet collection channel, and most of the steam flows upward in the inlet channel near the collecting port at the front end of the heat exchanger, causing the liquid flowing into the fluid channel and Uneven steam distribution affects the heat transfer performance of the plate heat exchanger.
  • traditional plate heat exchangers usually have a distributor at the inlet of the flow channel to reduce the area of the fluid inlet to limit the flow of fluid into the flow channel. , or increase the flow rate of the fluid in the flow channel, thereby achieving uniform distribution of the fluid in the flow channel.
  • the inlet distributor may affect the pressure drop generated by the fluid when it flows into the plate heat exchanger, and it also has an absolute impact on whether the fluid is evenly distributed among the various flow channels. When there are many plates in a plate heat exchanger, the pressure drop is concentrated at the entrance of the flow channel.
  • the pressure drop at the entrance of the flow channel is also an important factor in determining the overall heat transfer performance of the heat exchanger.
  • Traditional distributors reduce the fluid inlet area and effectively increase the flow rate of the fluid in the flow channel.
  • the flow pressure drop also increases, affecting the fluidity of the fluid and causing unnecessary pressure loss and uneven fluid flow. And further affects the heat transfer performance of the plate heat exchanger.
  • the heat exchange texture constructed in the flow channel area between the refrigerant inlet and the refrigerant outlet, and the brine inlet and the brine refrigerant outlet only includes transverse ribs, as used in the solution with the announcement number "CN201199138Y” W shape, or V shape used in the plan with announcement number "CN2826350Y”.
  • This type of plate heat exchanger needs further improvement to improve heat transfer efficiency and reduce fluid resistance.
  • the purpose of the present invention is to provide a plate heat exchanger with even internal fluid distribution and higher heat exchange efficiency.
  • a plate heat exchanger includes a plurality of plate heat exchange fins overlapped between a front plywood and a rear plywood; refrigerant heat exchange chambers and carriers are alternately formed between the front plywood, the plurality of plate heat exchange fins and the rear plywood.
  • the refrigerant heat exchange chamber, the refrigerant inlet and the refrigerant outlet on the front plywood and the multiple plate heat exchange fins are connected correspondingly to form a refrigerant input channel and a refrigerant output channel that are connected to the refrigerant heat exchange cavity; the front plywood and the multiple plate heat exchange fins are connected
  • the secondary refrigerant inlet and secondary refrigerant outlet on the heat exchanger are connected correspondingly to form a secondary refrigerant input channel and a secondary refrigerant output channel that are connected to the secondary refrigerant heat exchange chamber; it is characterized by:
  • a distribution plate is provided inside the refrigerant input channel along the direction of the channel, and the distribution plate has through holes arranged along the length direction of the plate body; the outer end of the distribution plate extends to the inlet end of the refrigerant input channel, and the distribution plate has The inner end extends to offset the rear splint; the distribution plate divides the refrigerant input channel into a first chamber and a second chamber. The refrigerant only enters from the outer end of the first chamber, and multiple refrigerants are exchanged.
  • the distribution holes of the heat chamber are all located in the second chamber;
  • the plate heat exchanger includes a plate body, a refrigerant inlet and a refrigerant outlet, as well as a brine refrigerant inlet and a brine refrigerant outlet respectively arranged at opposite corners of the plate body; the middle part of the plate body is between the refrigerant inlet and the refrigerant outlet.
  • a heat exchange texture is formed in the refrigerant outlet and the flow channel area between the brine inlet and the brine outlet.
  • the heat exchange texture includes a plurality of transverse ribs spaced apart in the longitudinal direction of the plate body, and A plurality of vertical convex ribs are arranged at intervals between two adjacent lateral convex ribs; both ends of the lateral convex ribs extend to the edge of the flow channel area along the transverse direction of the plate body.
  • the present invention adopts the above technical solution, which relates to a plate heat exchanger.
  • the front clamping plate and a plurality of plate heat exchange fins in the plate heat exchanger are connected to respectively form a refrigerant input channel, a refrigerant output channel, and a secondary cooling channel. agent input channel and brine refrigerant output channel.
  • the refrigerant flows from the refrigerant input channel and is distributed into each refrigerant heat exchange chamber, and then flows into the refrigerant output channel;
  • the secondary refrigerant flows from the secondary refrigerant input channel and is distributed to each secondary refrigerant. into the heat exchange cavity, and then merge into the secondary refrigerant output channel.
  • the plate heat exchanger has the following technical effects:
  • this solution is provided with a distribution plate inside the refrigerant input channel along the channel direction.
  • the distribution plate divides the refrigerant input channel into a first chamber and a second chamber.
  • the first chamber and the second chamber pass through the distribution plate.
  • the through holes are connected.
  • the refrigerant [gas-liquid mixture] is introduced from the outer end of the first chamber, and is once distributed into the second chamber through the through hole on the distribution plate to ensure that the refrigerant gas-liquid mixture is evenly mixed, and then is replaced by the refrigerant exchanger.
  • the distribution holes of the heat chamber feed into the interior of the second chamber.
  • the refrigerant inlet, refrigerant outlet, and secondary refrigerant inlet and secondary refrigerant outlet in the plate heat exchanger are respectively arranged at opposite corners of the plate body; and a heat exchange texture is constructed in the middle of the plate body.
  • the heat exchange texture in the plan also constructs multiple vertical convex ribs between two adjacent transverse convex ribs.
  • the transverse ribs and the vertical ribs have the same height.
  • the two ends of the vertical convex ribs are perpendicular to the two lateral convex ribs connected to them, and the vertical convex ribs and the transverse convex ribs are connected in an orthogonal or nearly orthogonal manner to increase the strength of the plate.
  • the transverse ribs are constructed in a V-shape or W-shape along the transverse direction of the board body; and/or the vertical ribs are constructed in a wavy or zigzag shape along the vertical direction of the board body.
  • the top surface of the transverse convex ribs is formed with rib grooves arranged in a corrugated or zigzag shape along its lateral extension direction, and/or the top surface of the vertical convex ribs is formed with corrugated or zigzag patterns along its vertical extension direction.
  • Shapely arranged grooves are provided on the top surface of the transverse convex ribs or the top surface of the vertical convex ribs, or both.
  • the heat exchange area is greatly increased and the heat exchange efficiency is improved; on the other hand, the heat exchange area is greatly increased.
  • grooves are arranged on the transverse convex ribs for the fluid (refrigerant or brine) to pass smoothly, thereby reducing the resistance to fluid flow, and the fluid can be distributed to multiple vertical convex ribs after flowing through the grooves on the transverse convex ribs. among them, it plays a distribution role.
  • the rib grooves arranged on the top surface of the vertical convex ribs can connect the channels between multiple vertical convex ribs to form a network of cross-turbulent flow, interrupt the fluid temperature stratification, and improve the heat transfer efficiency.
  • a guide area is provided between the refrigerant inlet and the coolant outlet, and between the refrigerant outlet and the coolant inlet, and the two guide areas are respectively located on the upper and lower sides of the heat exchange texture; a plurality of guide ribs are provided in the guide area, and the guide ribs are consistent in shape with the middle area of the transverse ribs, and the two ends face the refrigerant inlet and the coolant outlet on both sides, or the refrigerant outlet and the coolant inlet.
  • the distribution plate is arranged obliquely inside the refrigerant input channel, the diameter of the first chamber gradually becomes smaller from the outer end to the inner end, and the diameter of the second chamber gradually becomes larger from the outer end to the inner end; and finally There is a gap between the distribution hole inlet of the outer refrigerant heat exchange chamber and the distribution plate.
  • an inclined distribution plate is used so that both the first chamber and the second chamber are constructed as variable-diameter chambers, which is beneficial to the uniform distribution of the refrigerant [gas-liquid mixture] in the first chamber.
  • There is a gap between the distribution hole inlet of the outermost refrigerant heat exchange chamber and the distribution plate to ensure that the setting of the distribution plate will not interfere with the normal use of the distribution hole.
  • the distribution hole of the refrigerant heat exchange chamber includes an inlet section communicating with the second chamber, and an outlet section communicating with the refrigerant heat exchange cavity; the diameter of the inlet section is smaller than the diameter of the outlet section.
  • the hole shape of the inlet section of the distribution hole is oval or rugby-shaped.
  • the outer end of the distribution plate is provided with a sealing plate that closes the outer end of the second chamber. Based on the arrangement of the sealing plate, the refrigerant is only introduced from the outer end of the first chamber.
  • Figure 1 is a schematic end view of a plate heat exchanger using the structure created by the present invention.
  • FIG. 2 is a side view of a plate heat exchanger using the structure created by the present invention.
  • Figure 3 is a schematic three-dimensional view of a plate heat exchanger using the structure created by the present invention.
  • Figure 4 is an enlarged view of part A in Figure 3 .
  • FIG5 is a schematic cross-sectional view of the refrigerant input channel.
  • Figure 6 is a schematic diagram of the end face of the refrigerant input channel.
  • Figure 7 is a schematic structural diagram of the plate heat exchanger involved in the invention.
  • Figure 8 is a structural schematic diagram of rib grooves provided on transverse ribs.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise stated, the meaning of "plurality” is two or more than two, unless otherwise clearly defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components.
  • installed can be a fixed connection, a detachable connection, or an integral connection
  • it can be a mechanical connection or an electrical connection
  • it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components.
  • the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • the term “above” or “below” a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them.
  • the terms “above”, “above” and “above” a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature.
  • “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • this embodiment relates to a plate heat exchanger, which includes a plurality of plate heat exchange fins 3 overlapped between a front plywood 1 and a rear plywood 2 .
  • the refrigerant heat exchange chamber and the secondary refrigerant heat exchange chamber are alternately formed between the front plywood 1, the plurality of plate heat exchange fins 3 and the rear plywood 2.
  • the refrigerant inlet 101 on the front plywood 1 and the plurality of plate heat exchange fins 3 is formed alternately.
  • a refrigerant input channel 103 and a refrigerant output channel 104 are formed that communicate with the refrigerant heat exchange chamber.
  • the brine inlet 201 and the brine outlet 202 on the front plywood 1 and the plurality of plate heat exchange fins 3 are correspondingly connected to form a brine input channel 203 and a brine output channel 204 that communicate with the brine heat exchange chamber.
  • the front plate 1 and the plurality of plate heat exchange fins 3 in the plate heat exchanger are connected to form a refrigerant input channel 103, a refrigerant output channel 104, a brine input channel 203 and a brine refrigerant output channel 204 respectively.
  • the refrigerant flows from the refrigerant input channel 103 and is distributed into each refrigerant heat exchange chamber, and then merges into the refrigerant output channel 104 .
  • the brine flows from the brine input channel 203 and is distributed into each brine heat exchange cavity, and then merges into the brine output channel 204 .
  • the secondary refrigerant and the refrigerant perform heat exchange on both sides of the plate heat exchanger 3.
  • a distribution plate 4 is provided inside the refrigerant input channel 103 along the channel direction, and the distribution plate 4 has through holes 41 arranged along the length direction of the plate body.
  • the outer end of the distribution plate 4 extends to the inlet end of the refrigerant input channel 103 , and the inner end of the distribution plate 4 extends to offset the rear clamping plate 2 .
  • the distribution plate 4 divides the refrigerant input channel 103 into a first chamber 103a and a second chamber 103b.
  • the distribution holes 31 of multiple refrigerant heat exchange chambers are all located in the second chamber 103b.
  • the outer end of the distribution plate 4 is provided with a sealing plate 42 that closes the outer end of the second chamber 103b. Based on the arrangement of the sealing plate 42, the refrigerant is only introduced from the outer end of the first chamber 103a.
  • a distribution plate 4 is provided inside the refrigerant input channel 103 along the channel direction.
  • the distribution plate 4 divides the refrigerant input channel 103 into a first chamber 103a and a second chamber 103b.
  • the chambers 103b are connected through the through holes 41 on the distribution plate 4.
  • the refrigerant [gas-liquid mixture] is introduced from the outer end of the first chamber 103a, and is once distributed into the second chamber 103b through the through hole 41 on the distribution plate 4 to ensure uniform mixing of the refrigerant gas and liquid. Then it is sent into the second chamber 103b through the distribution hole 31 of the refrigerant heat exchange chamber. After the above two distributions, the distribution uniformity of the gas-liquid mixed refrigerant at medium and low flow rates can be greatly improved, thereby improving the plate replacement performance.
  • the distribution plate 4 is arranged obliquely inside the refrigerant input channel 103, the diameter of the first chamber 103a gradually becomes smaller from the outer end to the inner end, and the diameter of the second chamber 103b decreases from the outer end to the inner end. The ends gradually become larger. And there is a gap between the inlet of the distribution hole 31 of the outermost refrigerant heat exchange chamber and the distribution plate 4 .
  • an inclined distribution plate 4 is used, so that both the first chamber 103a and the second chamber 103b are constructed as variable-diameter chambers, which is beneficial to the refrigerant [gas-liquid mixture] inside the first chamber 103a. evenly distributed.
  • the distribution hole 31 of the refrigerant heat exchange chamber includes an inlet section 311 communicating with the second chamber 103b, and an outlet section 312 communicating with the refrigerant heat exchange cavity.
  • the diameter of the inlet section 311 is smaller than the diameter of the outlet section 312 .
  • the inlet section 311 of the distribution hole 31 of the refrigerant heat exchange cavity is made smaller to ensure more uniform secondary distribution.
  • the hole shape of the inlet section 311 of the distribution hole 31 is oval or rugby-shaped.
  • the plate heat exchanger 3 includes a plate body 30, a refrigerant inlet 101 and a refrigerant outlet 102, as well as a brine inlet 201 and a brine refrigerant outlet 202 respectively arranged oppositely on the plate body 30. On the opposite corner.
  • a heat exchange texture is formed in the middle part of the plate body 30 in the flow channel area between the refrigerant inlet 101 and the refrigerant outlet 102, as well as the brine inlet 201 and the brine refrigerant outlet 202.
  • the heat exchange texture is included in
  • the plate body 30 has a plurality of transverse ribs 32 spaced apart in the longitudinal direction, and a plurality of vertical ribs 33 spaced between two adjacent transverse ribs 32 .
  • Both ends of the transverse ribs 32 extend along the transverse direction of the plate body 30 to the edge of the flow channel area.
  • the refrigerant inlet 101 and the refrigerant outlet 102 in the plate heat exchanger 3, and the brine inlet 201 and the brine refrigerant outlet 202 are respectively arranged at opposite corners on the plate body 30.
  • a heat exchange texture is constructed in the middle of the plate body 30.
  • the heat exchange texture in this solution also has a plurality of vertical convex ribs 33 between two adjacent transverse convex ribs 32. .
  • the transverse ribs 32 and the vertical ribs 33 increase the length of the flow channel and the heat exchange area.
  • the vertical convex ribs 33 guide the flow between two adjacent lateral convex ribs 32. This structure can distribute the fluid twice and reduce the fluid resistance.
  • the heights of the transverse ribs 32 and the vertical ribs 33 are equal.
  • the two ends of the vertical ribs 33 are perpendicular to the two transverse ribs 32 connected to them.
  • the vertical ribs 33 and the transverse ribs 32 are connected in an orthogonal or nearly orthogonal manner to increase the strength of the plate.
  • the transverse ribs 32 are constructed into a V-shape or a W-shape along the transverse direction of the plate body 30 .
  • the vertical ribs 33 are constructed in a wavy or zigzag shape along the vertical direction of the plate body 30 .
  • the top surface of the transverse ribs 32 is formed with rib grooves 35 arranged in a corrugated or zigzag shape along its lateral extension direction, and/or the top surface of the vertical ribs 33 is formed along its vertical direction.
  • the rib grooves 35 arranged in a corrugated or zigzag shape are constructed in the extending direction.
  • rib grooves 35 adapted to their extension directions are provided on the top surface of the transverse ribs 32 or the vertical ribs 33 or both, which greatly increases the heat exchange area and improves the heat exchange efficiency.
  • rib grooves 35 are arranged on the transverse ribs 32 to allow the fluid (refrigerant or brine) to pass smoothly, thereby reducing the resistance to fluid flow, and the fluid can be distributed after flowing through the rib grooves 35 on the transverse ribs 32 to a plurality of vertical convex ribs 33 to play a distribution role.
  • the rib grooves 35 arranged on the top surface of the vertical convex ribs 33 can connect the channels between the plurality of vertical convex ribs 33 to form a network of cross-turbulent flow, interrupt the fluid temperature stratification, and improve the heat exchange efficiency.
  • a flow guide area 34 is provided between the refrigerant inlet 101 and the brine refrigerant outlet 202, and between the refrigerant outlet 102 and the brine refrigerant inlet 201.
  • the two flow guide areas 34 are respectively located in the heat exchange texture. Upper and lower sides.
  • a plurality of guide ribs 341 are provided in the guide area 34. The shape of the guide ribs 341 is consistent with the middle area of the transverse ribs 32, and the two ends face the refrigerant inlet 101 and the secondary refrigerant outlet on both sides. 202, or the refrigerant outlet 102 and the secondary refrigerant inlet 201.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A plate heat exchanger, comprising a plurality of heat exchange plates (3) which are stacked between a front clamping plate (1) and a rear clamping plate (2). A distribution plate (4) is arranged in a refrigerant feeding channel (103) along the channel direction; the distribution plate (4) divides the refrigerant feeding channel (103) into a first chamber (103a) and a second chamber (103b); the first chamber (103a) and the second chamber (103b) are communicated by means of through holes (41) on the distribution plate (4); a refrigerant inlet (101) and a refrigerant outlet (102), and a secondary refrigerant inlet (201) and a secondary refrigerant outlet (202) in each heat exchange plate (3) each are oppositely arranged on diagonal positions of a plate body (30); a heat exchange texture is constructed in the middle of the plate body (30); in addition to a plurality of transverse ribs (32), the heat exchange texture further comprises a plurality of vertical ribs (33) constructed between every two adjacent transverse ribs (32). By using the structure, fluids in the plate heat exchanger are uniformly distributed, and the heat exchange efficiency is higher.

Description

板式换热器Plate Heat Exchanger 技术领域Technical field
本发明涉及换热设备领域，尤其涉及一种板式换热器。The invention relates to the field of heat exchange equipment, and in particular to a plate heat exchanger.
背景技术Background technique
近年来,板式换热器广泛应用于制冷行业、空调行业、热泵***行业、热处理行业、石油化工行业、能源行业、余热回收行业等行业。板式换热器的结构和工作原理是使用具有波纹图案并堆叠在一起的金属片。金属片之间形成多条流体通道,使得两种流体(如液体到液体或液体到蒸汽)之间可以根据金属片的传热特性进行热量交换,达到加热或冷却的目的。该板式换热器具有结构紧凑、传热效率高、体积小、易于维护检查等优点。In recent years, plate heat exchangers have been widely used in refrigeration industry, air conditioning industry, heat pump system industry, heat treatment industry, petrochemical industry, energy industry, waste heat recovery industry and other industries. Plate heat exchangers are constructed and work by using metal sheets that have a corrugated pattern and are stacked together. Multiple fluid channels are formed between the metal sheets, so that heat can be exchanged between two fluids (such as liquid to liquid or liquid to steam) according to the heat transfer characteristics of the metal sheets to achieve the purpose of heating or cooling. This plate heat exchanger has the advantages of compact structure, high heat transfer efficiency, small size, and easy maintenance and inspection.
现有板式换热器可参考公告号为“CN2821502Y”的中国实用新型专利文本所记载的一种板式换热器，包括前外挡板、后外挡板，以及设置在前外挡板和后外挡板之间的多片波纹板片；前外挡板、后外挡板及其内部的多片波纹板片之间交替形成的制冷剂换热腔和载冷剂换热腔，制冷剂和载冷剂在波纹板片两侧实现热交换。在实际应用中,板式换热器的流体通常是两相混合流体,如液体和蒸汽的混合流体,而不是单相流体,而当两相流体(如制冷剂)流入板式换热器的入口通道,液体(如制冷剂液体)的惯性力和重力大于蒸汽(如制冷剂气体),液体的动量远大于蒸汽的动量。因此，导致大部分液体向前流向入口通道的板式换热器后端远离入口收集通道,大部分蒸汽则在换热器前端的集流口附近的入口通道向上流动,导致流入流体通道的液体和蒸汽分布不均,影响板式换热器的传热性能。For existing plate heat exchangers, please refer to the plate heat exchanger recorded in the Chinese utility model patent text with the announcement number "CN2821502Y", which includes a front outer baffle, a rear outer baffle, and a plate heat exchanger arranged between the front outer baffle and the rear outer baffle. Multiple corrugated plates between the outer baffles; refrigerant heat exchange chambers and secondary refrigerant heat exchange chambers formed alternately between the front outer baffle, the rear outer baffle and the multiple corrugated plates inside. The heat exchanger is realized with the refrigerant on both sides of the corrugated plate. In practical applications, the fluid of the plate heat exchanger is usually a two-phase mixed fluid, such as a mixed fluid of liquid and steam, rather than a single-phase fluid. When the two-phase fluid (such as refrigerant) flows into the inlet channel of the plate heat exchanger , the inertial force and gravity of liquid (such as refrigerant liquid) are greater than that of steam (such as refrigerant gas), and the momentum of liquid is much greater than the momentum of steam. Therefore, the rear end of the plate heat exchanger, which causes most of the liquid to flow forward to the inlet channel, is away from the inlet collection channel, and most of the steam flows upward in the inlet channel near the collecting port at the front end of the heat exchanger, causing the liquid flowing into the fluid channel and Uneven steam distribution affects the heat transfer performance of the plate heat exchanger.
因此,为了解决板式换热器流道入口处流体分布不均的问题,传统的板式换热器通常在其流道入口处设置分配器,用于减少流体入口的面积,以限制流体流入流道,或增加流体在流道中的流速,从而实现流体在流道中的均匀分布。但入口分配器可能会影响流体流入板式换热器时流体产生的压降,对流体在各个流道之间的分布是否均匀也有绝对的影响。当板式换热器板片较多时,压降集中在流道入口处,为此,流道入口处的压降也是决定换热器整体传热性能好坏的重要因素。传统分配器减小了流体入口面积,有效提高了流道内流体的流量,但流动压降也增大,影响流体的流动性,造成不必要的压力损失和流体不均匀。并进一步影响板式换热器的传热性能。Therefore, in order to solve the problem of uneven fluid distribution at the inlet of the flow channel of the plate heat exchanger, traditional plate heat exchangers usually have a distributor at the inlet of the flow channel to reduce the area of the fluid inlet to limit the flow of fluid into the flow channel. , or increase the flow rate of the fluid in the flow channel, thereby achieving uniform distribution of the fluid in the flow channel. However, the inlet distributor may affect the pressure drop generated by the fluid when it flows into the plate heat exchanger, and it also has an absolute impact on whether the fluid is evenly distributed among the various flow channels. When there are many plates in a plate heat exchanger, the pressure drop is concentrated at the entrance of the flow channel. Therefore, the pressure drop at the entrance of the flow channel is also an important factor in determining the overall heat transfer performance of the heat exchanger. Traditional distributors reduce the fluid inlet area and effectively increase the flow rate of the fluid in the flow channel. However, the flow pressure drop also increases, affecting the fluidity of the fluid and causing unnecessary pressure loss and uneven fluid flow. And further affects the heat transfer performance of the plate heat exchanger.
进一步地，参考公告号为“CN2826350Y”和“CN201199138Y”的中国在先专利申请文本所记载的板式换热片。在制冷剂进口与制冷剂出口，以及载冷剂进口和载冷剂出口之间的流道区域内构建的换热纹理仅包括横向筋条，如公告号为“CN201199138Y”的方案中所采用的W形，或者是公告号为“CN2826350Y”的方案中所采用的V形。此类板式换热器还需 要进一步改良，以提升换热效率、减少流体阻力。Further, refer to the plate heat exchangers recorded in China's prior patent applications with announcement numbers "CN2826350Y" and "CN201199138Y". The heat exchange texture constructed in the flow channel area between the refrigerant inlet and the refrigerant outlet, and the brine inlet and the brine refrigerant outlet only includes transverse ribs, as used in the solution with the announcement number "CN201199138Y" W shape, or V shape used in the plan with announcement number "CN2826350Y". This type of plate heat exchanger needs further improvement to improve heat transfer efficiency and reduce fluid resistance.
发明内容Contents of the invention
为了解决上述问题，本发明的目的在于提供一种板式换热器，该板式换热器内部流体分配均匀，换热效率更高。In order to solve the above problems, the purpose of the present invention is to provide a plate heat exchanger with even internal fluid distribution and higher heat exchange efficiency.
为了实现上述的目的，本发明采用了以下的技术方案：In order to achieve the above objects, the present invention adopts the following technical solutions:
一种板式换热器，包括重叠设置在前夹板和后夹板之间的多块板式换热片；前夹板、多块板式换热片和后夹板之间交替形成有制冷剂换热腔和载冷剂换热腔，前夹板以及多块板式换热片上的制冷剂进口和制冷剂出口对应连接构成与制冷剂换热腔相通的制冷剂输入通道和制冷剂输出通道；前夹板以及多块板式换热片上的载冷剂进口和载冷剂出口对应连接构成与载冷剂换热腔相通的载冷剂输入通道和载冷剂输出通道；其特征在于：A plate heat exchanger includes a plurality of plate heat exchange fins overlapped between a front plywood and a rear plywood; refrigerant heat exchange chambers and carriers are alternately formed between the front plywood, the plurality of plate heat exchange fins and the rear plywood. The refrigerant heat exchange chamber, the refrigerant inlet and the refrigerant outlet on the front plywood and the multiple plate heat exchange fins are connected correspondingly to form a refrigerant input channel and a refrigerant output channel that are connected to the refrigerant heat exchange cavity; the front plywood and the multiple plate heat exchange fins are connected The secondary refrigerant inlet and secondary refrigerant outlet on the heat exchanger are connected correspondingly to form a secondary refrigerant input channel and a secondary refrigerant output channel that are connected to the secondary refrigerant heat exchange chamber; it is characterized by:
所述制冷剂输入通道内部沿通道方向设置有分配板，分配板沿其板体长度方向布置有通孔；所述分配板的外端部延伸至制冷剂输入通道的进口端上，分配板的内端部延伸至与后夹板相抵；所述分配板将制冷剂输入通道分为第一腔室和第二腔室，制冷剂仅从第一腔室的外端通入，多个制冷剂换热腔的分配孔均处于第二腔室内；A distribution plate is provided inside the refrigerant input channel along the direction of the channel, and the distribution plate has through holes arranged along the length direction of the plate body; the outer end of the distribution plate extends to the inlet end of the refrigerant input channel, and the distribution plate has The inner end extends to offset the rear splint; the distribution plate divides the refrigerant input channel into a first chamber and a second chamber. The refrigerant only enters from the outer end of the first chamber, and multiple refrigerants are exchanged. The distribution holes of the heat chamber are all located in the second chamber;
所述板式换热片包括板体，制冷剂进口与制冷剂出口，以及载冷剂进口和载冷剂出口分别相对布置于板体上的对角上；所述板体中部在制冷剂进口与制冷剂出口，以及载冷剂进口和载冷剂出口之间的流道区域内构建形成有换热纹理，所述换热纹理包括在板体纵向方向上间隔布置的多条横向凸筋，以及间隔布置于相邻两条横向凸筋之间的多条竖向凸筋；所述横向凸筋两端部沿板体横向方向延伸至流道区域边缘。The plate heat exchanger includes a plate body, a refrigerant inlet and a refrigerant outlet, as well as a brine refrigerant inlet and a brine refrigerant outlet respectively arranged at opposite corners of the plate body; the middle part of the plate body is between the refrigerant inlet and the refrigerant outlet. A heat exchange texture is formed in the refrigerant outlet and the flow channel area between the brine inlet and the brine outlet. The heat exchange texture includes a plurality of transverse ribs spaced apart in the longitudinal direction of the plate body, and A plurality of vertical convex ribs are arranged at intervals between two adjacent lateral convex ribs; both ends of the lateral convex ribs extend to the edge of the flow channel area along the transverse direction of the plate body.
本发明采用上述技术方案，该技术方案涉及一种板式换热器，该板式换热器中的前夹板以及多块板式换热片上相连通分别构成制冷剂输入通道、制冷剂输出通道、载冷剂输入通道和载冷剂输出通道。该板式换热器使用时，制冷剂从制冷剂输入通道流入分配到各个制冷剂换热腔内，然后汇流到制冷剂输出通道；载冷剂从载冷剂输入通道流入分配到各个载冷剂换热腔内，然后汇流到载冷剂输出通道。载冷剂和制冷剂在板式换热片两侧进行热交换。在此基础上，该板式换热器具有以下技术效果：The present invention adopts the above technical solution, which relates to a plate heat exchanger. The front clamping plate and a plurality of plate heat exchange fins in the plate heat exchanger are connected to respectively form a refrigerant input channel, a refrigerant output channel, and a secondary cooling channel. agent input channel and brine refrigerant output channel. When the plate heat exchanger is used, the refrigerant flows from the refrigerant input channel and is distributed into each refrigerant heat exchange chamber, and then flows into the refrigerant output channel; the secondary refrigerant flows from the secondary refrigerant input channel and is distributed to each secondary refrigerant. into the heat exchange cavity, and then merge into the secondary refrigerant output channel. The refrigerant and refrigerant exchange heat on both sides of the plate heat exchanger. On this basis, the plate heat exchanger has the following technical effects:
1，因制冷剂输入通道内部流入的制冷剂是气液混合物，存在背景技术中记载的分配不均匀的问题。故本方案在制冷剂输入通道内部沿通道方向设置有分配板，分配板将制冷剂输入通道分为第一腔室和第二腔室，第一腔室和第二腔室通过分配板上的通孔相连通。使用时，制冷剂【气液混合物】从第一腔室外端通入，经过分配板上的通孔进行一次分配到第二腔室内，以保证制冷剂气液混合均匀，然后在通过制冷剂换热腔的分配孔送入第二腔室内部。经过上述两次分配能够大幅提高中、低流速下气液混合制冷剂的分配均匀度，从而提高板换性能。1. Since the refrigerant flowing into the refrigerant input channel is a gas-liquid mixture, there is the problem of uneven distribution described in the background art. Therefore, this solution is provided with a distribution plate inside the refrigerant input channel along the channel direction. The distribution plate divides the refrigerant input channel into a first chamber and a second chamber. The first chamber and the second chamber pass through the distribution plate. The through holes are connected. When in use, the refrigerant [gas-liquid mixture] is introduced from the outer end of the first chamber, and is once distributed into the second chamber through the through hole on the distribution plate to ensure that the refrigerant gas-liquid mixture is evenly mixed, and then is replaced by the refrigerant exchanger. The distribution holes of the heat chamber feed into the interior of the second chamber. After the above two distributions, the distribution uniformity of the gas-liquid mixed refrigerant at medium and low flow rates can be greatly improved, thereby improving the plate replacement performance.
2，该板式换热片中的制冷剂进口与制冷剂出口，载冷剂进口和载冷剂出口分别相对布置于板体上的对角上；并在板体中部构建有换热纹理，此方案中的换热纹理除了多条横向凸筋之外，还在相邻两条横向凸筋之间构建有多条竖向凸筋。在制冷剂或载冷剂流经该流道区域时，横向凸筋和竖向凸筋增大了流道长度和换热面积；并且，竖向凸筋在相邻两条横向凸筋之间进行导流，此结构下能够起到两次分配、减少流体阻力的作用。2. The refrigerant inlet, refrigerant outlet, and secondary refrigerant inlet and secondary refrigerant outlet in the plate heat exchanger are respectively arranged at opposite corners of the plate body; and a heat exchange texture is constructed in the middle of the plate body. In addition to multiple transverse convex ribs, the heat exchange texture in the plan also constructs multiple vertical convex ribs between two adjacent transverse convex ribs. When the refrigerant or secondary refrigerant flows through the flow channel area, the transverse convex ribs and the vertical convex ribs increase the length of the flow channel and the heat exchange area; and the vertical convex ribs are between two adjacent transverse convex ribs. Conducting flow diversion, this structure can distribute twice and reduce fluid resistance.
作为优选，所述横向凸筋和竖向凸筋的高度相等。Preferably, the transverse ribs and the vertical ribs have the same height.
作为优选，所述竖向凸筋的两端部与其相连的两条横向凸筋相垂直，竖向凸筋与横向凸筋以正交或接近正交的方式相连，增大板片强度。Preferably, the two ends of the vertical convex ribs are perpendicular to the two lateral convex ribs connected to them, and the vertical convex ribs and the transverse convex ribs are connected in an orthogonal or nearly orthogonal manner to increase the strength of the plate.
作为优选，所述横向凸筋沿板体横向方向被构建为V型或W型；和/或所述竖向凸筋沿板体竖向方向被构建为波浪形或锯齿形。Preferably, the transverse ribs are constructed in a V-shape or W-shape along the transverse direction of the board body; and/or the vertical ribs are constructed in a wavy or zigzag shape along the vertical direction of the board body.
作为优选，所述横向凸筋顶面沿其横向延伸方向构建形成有波纹形或锯齿形布置的筋槽，和/或竖向凸筋顶面沿其竖向延伸方向构建形成有波纹形或锯齿形布置的筋槽。此方案中，在横向凸筋顶面或是竖向凸筋顶面或者两者顶面上设置与其延伸方向适配的筋槽，一方面大大增加换热面积、提升换热效率；另一方面，横向凸筋上布置筋槽可供流体【制冷剂或载冷剂】顺利经过，从而减少流体流动的阻力，并且流体经过横向凸筋上的筋槽流过后可分配到多条竖向凸筋之间，起到分配作用。竖向凸筋顶面上布置筋槽可供多条竖向凸筋之间的通道相互连通，形成网状交叉紊流，打断流体温度分层，提升换热效率。Preferably, the top surface of the transverse convex ribs is formed with rib grooves arranged in a corrugated or zigzag shape along its lateral extension direction, and/or the top surface of the vertical convex ribs is formed with corrugated or zigzag patterns along its vertical extension direction. Shapely arranged grooves. In this solution, rib grooves adapted to their extension directions are provided on the top surface of the transverse convex ribs or the top surface of the vertical convex ribs, or both. On the one hand, the heat exchange area is greatly increased and the heat exchange efficiency is improved; on the other hand, the heat exchange area is greatly increased. , grooves are arranged on the transverse convex ribs for the fluid (refrigerant or brine) to pass smoothly, thereby reducing the resistance to fluid flow, and the fluid can be distributed to multiple vertical convex ribs after flowing through the grooves on the transverse convex ribs. among them, it plays a distribution role. The rib grooves arranged on the top surface of the vertical convex ribs can connect the channels between multiple vertical convex ribs to form a network of cross-turbulent flow, interrupt the fluid temperature stratification, and improve the heat transfer efficiency.
作为优选，所述制冷剂进口与载冷剂出口之间，以及制冷剂出口与载冷剂进口之间均设置有导流区，两个导流区分别处于换热纹理的上下两侧；所述导流区内设置有多条导流凸筋，导流凸筋与横向凸筋中部区域的形状一致，且两端部朝向两侧的制冷剂进口与载冷剂出口，或制冷剂出口与载冷剂进口。此方案中，流体【制冷剂或载冷剂】经过制冷剂进口或载冷剂进口流入后，经过导流凸筋引导流入流道区域进行换热，然后在经过导流凸筋引导到制冷剂出口和载冷剂出口之间留出。Preferably, a guide area is provided between the refrigerant inlet and the coolant outlet, and between the refrigerant outlet and the coolant inlet, and the two guide areas are respectively located on the upper and lower sides of the heat exchange texture; a plurality of guide ribs are provided in the guide area, and the guide ribs are consistent in shape with the middle area of the transverse ribs, and the two ends face the refrigerant inlet and the coolant outlet on both sides, or the refrigerant outlet and the coolant inlet. In this scheme, after the fluid [refrigerant or coolant] flows in through the refrigerant inlet or the coolant inlet, it is guided by the guide ribs to flow into the flow channel area for heat exchange, and then guided by the guide ribs to be reserved between the refrigerant outlet and the coolant outlet.
作为优选，所述分配板倾斜布置于制冷剂输入通道内部，第一腔室的口径从外端至内端逐渐变小，第二腔室的口径从外端至内端逐渐变大；且最外侧制冷剂换热腔的分配孔进口与分配板之间留有间隙。此方案中，采用倾斜设置的分配板，使第一腔室和第二腔室均被构建为变径腔室，从而有利于制冷剂【气液混合物】在第一腔室内部分布均匀。最外侧制冷剂换热腔的分配孔进口与分配板之间留有间隙，以保证分配板的设置不会干涉该分配孔的正常使用。Preferably, the distribution plate is arranged obliquely inside the refrigerant input channel, the diameter of the first chamber gradually becomes smaller from the outer end to the inner end, and the diameter of the second chamber gradually becomes larger from the outer end to the inner end; and finally There is a gap between the distribution hole inlet of the outer refrigerant heat exchange chamber and the distribution plate. In this solution, an inclined distribution plate is used so that both the first chamber and the second chamber are constructed as variable-diameter chambers, which is beneficial to the uniform distribution of the refrigerant [gas-liquid mixture] in the first chamber. There is a gap between the distribution hole inlet of the outermost refrigerant heat exchange chamber and the distribution plate to ensure that the setting of the distribution plate will not interfere with the normal use of the distribution hole.
作为优选，所述制冷剂换热腔的分配孔包括与第二腔室相通的入口段，以及与制冷剂换热腔相通的出口段；所述入口段的口径小于出口段的口径。此方案将制冷剂换热腔的分 配孔入口段做小，以保证二次分配更加均匀。Preferably, the distribution hole of the refrigerant heat exchange chamber includes an inlet section communicating with the second chamber, and an outlet section communicating with the refrigerant heat exchange cavity; the diameter of the inlet section is smaller than the diameter of the outlet section. This solution makes the entrance section of the distribution hole of the refrigerant heat exchange chamber smaller to ensure more even secondary distribution.
作为优选，所述分配孔入口段的孔型为椭圆形或橄榄球型。Preferably, the hole shape of the inlet section of the distribution hole is oval or rugby-shaped.
作为优选，所述分配板的外端部上设置有封闭第二腔室外端腔口的封板，基于封板的设置，使制冷剂仅从第一腔室的外端通入。Preferably, the outer end of the distribution plate is provided with a sealing plate that closes the outer end of the second chamber. Based on the arrangement of the sealing plate, the refrigerant is only introduced from the outer end of the first chamber.
附图说明Description of drawings
图1为采用本发明创造结构的板式换热器端面示意图。Figure 1 is a schematic end view of a plate heat exchanger using the structure created by the present invention.
图2为采用本发明创造结构的板式换热器侧面示意图。FIG. 2 is a side view of a plate heat exchanger using the structure created by the present invention.
图3为采用本发明创造结构的板式换热器立体示意图。Figure 3 is a schematic three-dimensional view of a plate heat exchanger using the structure created by the present invention.
图4为图3的A部放大图。Figure 4 is an enlarged view of part A in Figure 3 .
图5为制冷剂输入通道的截面示意简图。FIG5 is a schematic cross-sectional view of the refrigerant input channel.
图6为制冷剂输入通道的端面示意简图。Figure 6 is a schematic diagram of the end face of the refrigerant input channel.
图7为本发明创造涉及的板式换热片结构示意图。Figure 7 is a schematic structural diagram of the plate heat exchanger involved in the invention.
图8为横向凸筋上设置筋槽的结构示意图。Figure 8 is a structural schematic diagram of rib grooves provided on transverse ribs.
具体实施方式Detailed ways
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention and are not to be understood as limiting the present invention.
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The directions or positional relationships indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" etc. are based on the attached The orientations or positional relationships shown in the figures are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed and operated in specific orientations, and therefore cannot be understood as limiting the present invention. Limitations of Invention.
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上，除非另有明确的限定。In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more than two, unless otherwise clearly defined.
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
在本发明中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。In the present invention, unless otherwise expressly provided and limited, the term "above" or "below" a first feature of a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “under” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.
如图1～8所示，本实施例涉及一种板式换热器，包括重叠设置在前夹板1和后夹板2之间的多块板式换热片3。前夹板1、多块板式换热片3和后夹板2之间交替形成有制冷剂换热腔和载冷剂换热腔，前夹板1以及多块板式换热片3上的制冷剂进口101和制冷剂出口102对应连接构成与制冷剂换热腔相通的制冷剂输入通道103和制冷剂输出通道104。前夹板1以及多块板式换热片3上的载冷剂进口201和载冷剂出口202对应连接构成与载冷剂换热腔相通的载冷剂输入通道203和载冷剂输出通道204。该板式换热器中的前夹板1以及多块板式换热片3上相连通分别构成制冷剂输入通道103、制冷剂输出通道104、载冷剂输入通道203和载冷剂输出通道204。该板式换热器使用时，制冷剂从制冷剂输入通道103流入分配到各个制冷剂换热腔内，然后汇流到制冷剂输出通道104。载冷剂从载冷剂输入通道203流入分配到各个载冷剂换热腔内，然后汇流到载冷剂输出通道204。载冷剂和制冷剂在板式换热片3两侧进行热交换。As shown in FIGS. 1 to 8 , this embodiment relates to a plate heat exchanger, which includes a plurality of plate heat exchange fins 3 overlapped between a front plywood 1 and a rear plywood 2 . The refrigerant heat exchange chamber and the secondary refrigerant heat exchange chamber are alternately formed between the front plywood 1, the plurality of plate heat exchange fins 3 and the rear plywood 2. The refrigerant inlet 101 on the front plywood 1 and the plurality of plate heat exchange fins 3 is formed alternately. Correspondingly connected with the refrigerant outlet 102, a refrigerant input channel 103 and a refrigerant output channel 104 are formed that communicate with the refrigerant heat exchange chamber. The brine inlet 201 and the brine outlet 202 on the front plywood 1 and the plurality of plate heat exchange fins 3 are correspondingly connected to form a brine input channel 203 and a brine output channel 204 that communicate with the brine heat exchange chamber. The front plate 1 and the plurality of plate heat exchange fins 3 in the plate heat exchanger are connected to form a refrigerant input channel 103, a refrigerant output channel 104, a brine input channel 203 and a brine refrigerant output channel 204 respectively. When the plate heat exchanger is used, the refrigerant flows from the refrigerant input channel 103 and is distributed into each refrigerant heat exchange chamber, and then merges into the refrigerant output channel 104 . The brine flows from the brine input channel 203 and is distributed into each brine heat exchange cavity, and then merges into the brine output channel 204 . The secondary refrigerant and the refrigerant perform heat exchange on both sides of the plate heat exchanger 3.
在此基础上，因制冷剂输入通道103内部流入的制冷剂是气液混合物，存在背景技术中记载的分配不均匀的问题。参考附图4-6所示，所述制冷剂输入通道103内部沿通道方向设置有分配板4，分配板4沿其板体长度方向布置有通孔41。所述分配板4的外端部延伸至制冷剂输入通道103的进口端上，分配板4的内端部延伸至与后夹板2相抵。所述分配板4将制冷剂输入通道103分为第一腔室103a和第二腔室103b，多个制冷剂换热腔的分配孔31均处于第二腔室103b内。所述分配板4的外端部上设置有封闭第二腔室103b外端腔口的封板42，基于封板42的设置，使制冷剂仅从第一腔室103a的外端通入。本方案在制冷剂输入通道103内部沿通道方向设置有分配板4，分配板4将制冷剂输入通道103分为第一腔室103a和第二腔室103b，第一腔室103a和第二腔室103b通过分配板4上的通孔41相连通。使用时，制冷剂【气液混合物】从第一腔室103a外端通入，经过分配板4上的通孔41进行一次分配到第二腔室103b内，以保证制冷剂气液混合均匀，然后在通过制冷剂换热腔的分配孔31送入第二腔室103b内部。经过上述两次分配能够大幅提高中、低流速下气液混合制冷剂的分配均匀度，从而提高板换性能。On this basis, since the refrigerant flowing into the refrigerant input channel 103 is a gas-liquid mixture, there is a problem of uneven distribution described in the background art. Referring to Figures 4-6, a distribution plate 4 is provided inside the refrigerant input channel 103 along the channel direction, and the distribution plate 4 has through holes 41 arranged along the length direction of the plate body. The outer end of the distribution plate 4 extends to the inlet end of the refrigerant input channel 103 , and the inner end of the distribution plate 4 extends to offset the rear clamping plate 2 . The distribution plate 4 divides the refrigerant input channel 103 into a first chamber 103a and a second chamber 103b. The distribution holes 31 of multiple refrigerant heat exchange chambers are all located in the second chamber 103b. The outer end of the distribution plate 4 is provided with a sealing plate 42 that closes the outer end of the second chamber 103b. Based on the arrangement of the sealing plate 42, the refrigerant is only introduced from the outer end of the first chamber 103a. In this solution, a distribution plate 4 is provided inside the refrigerant input channel 103 along the channel direction. The distribution plate 4 divides the refrigerant input channel 103 into a first chamber 103a and a second chamber 103b. The first chamber 103a and the second chamber The chambers 103b are connected through the through holes 41 on the distribution plate 4. During use, the refrigerant [gas-liquid mixture] is introduced from the outer end of the first chamber 103a, and is once distributed into the second chamber 103b through the through hole 41 on the distribution plate 4 to ensure uniform mixing of the refrigerant gas and liquid. Then it is sent into the second chamber 103b through the distribution hole 31 of the refrigerant heat exchange chamber. After the above two distributions, the distribution uniformity of the gas-liquid mixed refrigerant at medium and low flow rates can be greatly improved, thereby improving the plate replacement performance.
进一步优选的方案中，所述分配板4倾斜布置于制冷剂输入通道103内部，第一腔 室103a的口径从外端至内端逐渐变小，第二腔室103b的口径从外端至内端逐渐变大。且最外侧制冷剂换热腔的分配孔31进口与分配板4之间留有间隙。此方案中，采用倾斜设置的分配板4，使第一腔室103a和第二腔室103b均被构建为变径腔室，从而有利于制冷剂【气液混合物】在第一腔室103a内部分布均匀。最外侧制冷剂换热腔的分配孔31进口与分配板4之间留有间隙，以保证分配板4的设置不会干涉该分配孔31的正常使用。In a further preferred solution, the distribution plate 4 is arranged obliquely inside the refrigerant input channel 103, the diameter of the first chamber 103a gradually becomes smaller from the outer end to the inner end, and the diameter of the second chamber 103b decreases from the outer end to the inner end. The ends gradually become larger. And there is a gap between the inlet of the distribution hole 31 of the outermost refrigerant heat exchange chamber and the distribution plate 4 . In this solution, an inclined distribution plate 4 is used, so that both the first chamber 103a and the second chamber 103b are constructed as variable-diameter chambers, which is beneficial to the refrigerant [gas-liquid mixture] inside the first chamber 103a. evenly distributed. There is a gap between the inlet of the distribution hole 31 of the outermost refrigerant heat exchange chamber and the distribution plate 4 to ensure that the arrangement of the distribution plate 4 will not interfere with the normal use of the distribution hole 31 .
如图6所示，所述制冷剂换热腔的分配孔31包括与第二腔室103b相通的入口段311，以及与制冷剂换热腔相通的出口段312。所述入口段311的口径小于出口段312的口径。此方案将制冷剂换热腔的分配孔31的入口段311做小，以保证二次分配更加均匀。优选方案中，所述分配孔31入口段311的孔型为椭圆形或橄榄球型。As shown in Figure 6, the distribution hole 31 of the refrigerant heat exchange chamber includes an inlet section 311 communicating with the second chamber 103b, and an outlet section 312 communicating with the refrigerant heat exchange cavity. The diameter of the inlet section 311 is smaller than the diameter of the outlet section 312 . In this solution, the inlet section 311 of the distribution hole 31 of the refrigerant heat exchange cavity is made smaller to ensure more uniform secondary distribution. In a preferred solution, the hole shape of the inlet section 311 of the distribution hole 31 is oval or rugby-shaped.
参考附图7所示，所述板式换热片3包括板体30，制冷剂进口101与制冷剂出口102，以及载冷剂进口201和载冷剂出口202分别相对布置于板体30上的对角上。所述板体30中部在制冷剂进口101与制冷剂出口102，以及载冷剂进口201和载冷剂出口202之间的流道区域内构建形成有换热纹理，所述换热纹理包括在板体30纵向方向上间隔布置的多条横向凸筋32，以及间隔布置于相邻两条横向凸筋32之间的多条竖向凸筋33。所述横向凸筋32两端部沿板体30横向方向延伸至流道区域边缘。该板式换热片3中的制冷剂进口101与制冷剂出口102，载冷剂进口201和载冷剂出口202分别相对布置于板体30上的对角上。并在板体30中部构建有换热纹理，此方案中的换热纹理除了多条横向凸筋32之外，还在相邻两条横向凸筋32之间构建有多条竖向凸筋33。在制冷剂或载冷剂流经该流道区域时，横向凸筋32和竖向凸筋33增大了流道长度和换热面积。并且，竖向凸筋33在相邻两条横向凸筋32之间进行导流，此结构下能够起到两次分配、减少流体阻力的作用。Referring to Figure 7, the plate heat exchanger 3 includes a plate body 30, a refrigerant inlet 101 and a refrigerant outlet 102, as well as a brine inlet 201 and a brine refrigerant outlet 202 respectively arranged oppositely on the plate body 30. On the opposite corner. A heat exchange texture is formed in the middle part of the plate body 30 in the flow channel area between the refrigerant inlet 101 and the refrigerant outlet 102, as well as the brine inlet 201 and the brine refrigerant outlet 202. The heat exchange texture is included in The plate body 30 has a plurality of transverse ribs 32 spaced apart in the longitudinal direction, and a plurality of vertical ribs 33 spaced between two adjacent transverse ribs 32 . Both ends of the transverse ribs 32 extend along the transverse direction of the plate body 30 to the edge of the flow channel area. The refrigerant inlet 101 and the refrigerant outlet 102 in the plate heat exchanger 3, and the brine inlet 201 and the brine refrigerant outlet 202 are respectively arranged at opposite corners on the plate body 30. A heat exchange texture is constructed in the middle of the plate body 30. In addition to a plurality of transverse convex ribs 32, the heat exchange texture in this solution also has a plurality of vertical convex ribs 33 between two adjacent transverse convex ribs 32. . When the refrigerant or secondary refrigerant flows through the flow channel area, the transverse ribs 32 and the vertical ribs 33 increase the length of the flow channel and the heat exchange area. In addition, the vertical convex ribs 33 guide the flow between two adjacent lateral convex ribs 32. This structure can distribute the fluid twice and reduce the fluid resistance.
具体方案中，所述横向凸筋32和竖向凸筋33的高度相等。所述竖向凸筋33的两端部与其相连的两条横向凸筋32相垂直，竖向凸筋33与横向凸筋32以正交或接近正交的方式相连，增大板片强度。如图7所示，所述横向凸筋32沿板体30横向方向被构建为V型或W型。和/或所述竖向凸筋33沿板体30竖向方向被构建为波浪形或锯齿形。In a specific solution, the heights of the transverse ribs 32 and the vertical ribs 33 are equal. The two ends of the vertical ribs 33 are perpendicular to the two transverse ribs 32 connected to them. The vertical ribs 33 and the transverse ribs 32 are connected in an orthogonal or nearly orthogonal manner to increase the strength of the plate. As shown in FIG. 7 , the transverse ribs 32 are constructed into a V-shape or a W-shape along the transverse direction of the plate body 30 . And/or the vertical ribs 33 are constructed in a wavy or zigzag shape along the vertical direction of the plate body 30 .
进一步如图8所示的方案中，所述横向凸筋32顶面沿其横向延伸方向构建形成有波纹形或锯齿形布置的筋槽35，和/或竖向凸筋33顶面沿其竖向延伸方向构建形成有波纹形或锯齿形布置的筋槽35。此方案中，在横向凸筋32顶面或是竖向凸筋33顶面或者两者顶面上设置与其延伸方向适配的筋槽35，一方面大大增加换热面积、提升换热效率。另一方面，横向凸筋32上布置筋槽35可供流体【制冷剂或载冷剂】顺利经过，从而减少流体流动的阻力，并且流体经过横向凸筋32上的筋槽35流过后可分配到多条竖向凸筋33之间，起到分配作用。竖向凸筋33顶面上布置筋槽35可供多条竖向凸筋33之间的通道相互连通，形成网状 交叉紊流，打断流体温度分层，提升换热效率。Further in the solution shown in Figure 8, the top surface of the transverse ribs 32 is formed with rib grooves 35 arranged in a corrugated or zigzag shape along its lateral extension direction, and/or the top surface of the vertical ribs 33 is formed along its vertical direction. The rib grooves 35 arranged in a corrugated or zigzag shape are constructed in the extending direction. In this solution, rib grooves 35 adapted to their extension directions are provided on the top surface of the transverse ribs 32 or the vertical ribs 33 or both, which greatly increases the heat exchange area and improves the heat exchange efficiency. On the other hand, rib grooves 35 are arranged on the transverse ribs 32 to allow the fluid (refrigerant or brine) to pass smoothly, thereby reducing the resistance to fluid flow, and the fluid can be distributed after flowing through the rib grooves 35 on the transverse ribs 32 to a plurality of vertical convex ribs 33 to play a distribution role. The rib grooves 35 arranged on the top surface of the vertical convex ribs 33 can connect the channels between the plurality of vertical convex ribs 33 to form a network of cross-turbulent flow, interrupt the fluid temperature stratification, and improve the heat exchange efficiency.
此外，所述制冷剂进口101与载冷剂出口202之间，以及制冷剂出口102与载冷剂进口201之间均设置有导流区34，两个导流区34分别处于换热纹理的上下两侧。所述导流区34内设置有多条导流凸筋341，导流凸筋341与横向凸筋32中部区域的形状一致，且两端部朝向两侧的制冷剂进口101与载冷剂出口202，或制冷剂出口102与载冷剂进口201。此方案中，流体【制冷剂或载冷剂】经过制冷剂进口101或载冷剂进口201流入后，经过导流凸筋341引导流入流道区域进行换热，然后在经过导流凸筋341引导到制冷剂出口102和载冷剂出口202之间留出。In addition, a flow guide area 34 is provided between the refrigerant inlet 101 and the brine refrigerant outlet 202, and between the refrigerant outlet 102 and the brine refrigerant inlet 201. The two flow guide areas 34 are respectively located in the heat exchange texture. Upper and lower sides. A plurality of guide ribs 341 are provided in the guide area 34. The shape of the guide ribs 341 is consistent with the middle area of the transverse ribs 32, and the two ends face the refrigerant inlet 101 and the secondary refrigerant outlet on both sides. 202, or the refrigerant outlet 102 and the secondary refrigerant inlet 201. In this scheme, after the fluid [refrigerant or brine] flows in through the refrigerant inlet 101 or the brine inlet 201, it is guided by the guide ribs 341 and flows into the flow channel area for heat exchange, and then passes through the guide ribs 341 It is guided to leave between the refrigerant outlet 102 and the secondary refrigerant outlet 202 .
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在不脱离本发明的原理和宗旨的情况下在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are illustrative and should not be construed as limitations of the present invention. Those of ordinary skill in the art will not deviate from the principles and purposes of the present invention. Under the circumstances, the above-described embodiments can be changed, modified, replaced and modified within the scope of the present invention.

Claims (10)

  1. 板式换热器，包括重叠设置在前夹板(1)和后夹板(2)之间的多块板式换热片(3)；前夹板(1)、多块板式换热片(3)和后夹板(2)之间交替形成有制冷剂换热腔和载冷剂换热腔，前夹板(1)以及多块板式换热片(3)上的制冷剂进口(101)和制冷剂出口(102)对应连接构成与制冷剂换热腔相通的制冷剂输入通道(103)和制冷剂输出通道(104)；前夹板(1)以及多块板式换热片(3)上的载冷剂进口(201)和载冷剂出口(202)对应连接构成与载冷剂换热腔相通的载冷剂输入通道(203)和载冷剂输出通道(204)；其特征在于：The plate heat exchanger includes multiple plate heat exchange fins (3) overlapped between the front plywood (1) and the rear plywood (2); the front plywood (1), the multiple plate heat exchange fins (3) and the rear plywood. A refrigerant heat exchange chamber and a secondary refrigerant heat exchange chamber are alternately formed between the plywood (2). The refrigerant inlet (101) and the refrigerant outlet (101) on the front plywood (1) and the plurality of plate heat exchange fins (3) are formed alternately. 102) are connected correspondingly to form a refrigerant input channel (103) and a refrigerant output channel (104) connected to the refrigerant heat exchange chamber; the secondary refrigerant inlets on the front plywood (1) and multiple plate heat exchange fins (3) (201) and the brine outlet (202) are correspondingly connected to form a brine input channel (203) and a brine output channel (204) that are connected to the brine heat exchange chamber; it is characterized by:
    所述制冷剂输入通道(103)内部沿通道方向设置有分配板(4)，分配板(4)沿其板体(30)长度方向布置有通孔(41)；所述分配板(4)的外端部延伸至制冷剂输入通道(103)的进口端上，分配板(4)的内端部延伸至与后夹板(2)相抵；所述分配板(4)将制冷剂输入通道(103)分为第一腔室(103a)和第二腔室(103b)，制冷剂仅从第一腔室(103a)的外端通入，多个制冷剂换热腔的分配孔(31)均处于第二腔室(103b)内；A distribution plate (4) is arranged inside the refrigerant input channel (103) along the channel direction, and the distribution plate (4) is provided with through holes (41) along the length direction of its plate body (30); the outer end of the distribution plate (4) extends to the inlet end of the refrigerant input channel (103), and the inner end of the distribution plate (4) extends to abut against the rear clamping plate (2); the distribution plate (4) divides the refrigerant input channel (103) into a first chamber (103a) and a second chamber (103b), and the refrigerant only enters from the outer end of the first chamber (103a), and the distribution holes (31) of the multiple refrigerant heat exchange chambers are all located in the second chamber (103b);
    所述板式换热片(3)包括板体(30)，制冷剂进口(101)与制冷剂出口(102)，以及载冷剂进口(201)和载冷剂出口(202)分别相对布置于板体(30)上的对角上；所述板体(30)中部在制冷剂进口(101)与制冷剂出口(102)，以及载冷剂进口(201)和载冷剂出口(202)之间的流道区域内构建形成有换热纹理，所述换热纹理包括在板体(30)纵向方向上间隔布置的多条横向凸筋(32)，以及间隔布置于相邻两条横向凸筋(32)之间的多条竖向凸筋(33)；所述横向凸筋(32)两端部沿板体(30)横向方向延伸至流道区域边缘。The plate heat exchanger (3) includes a plate body (30), a refrigerant inlet (101) and a refrigerant outlet (102), as well as a brine refrigerant inlet (201) and a brine refrigerant outlet (202) respectively arranged opposite to each other. on the diagonal corners of the plate body (30); the middle part of the plate body (30) is between the refrigerant inlet (101) and the refrigerant outlet (102), as well as the brine inlet (201) and the brine coolant outlet (202). A heat exchange texture is formed in the flow channel area between them. The heat exchange texture includes a plurality of transverse ribs (32) spaced apart in the longitudinal direction of the plate body (30), and two adjacent transverse ribs (32) spaced apart. There are a plurality of vertical ribs (33) between the ribs (32); the two ends of the transverse ribs (32) extend to the edge of the flow channel area along the transverse direction of the plate body (30).
  2. 根据权利要求1所述的板式换热器，其特征在于：所述横向凸筋(32)和竖向凸筋(33)的高度相等。The plate heat exchanger according to claim 1, characterized in that the heights of the transverse ribs (32) and the vertical ribs (33) are equal.
  3. 根据权利要求1所述的板式换热器，其特征在于：所述竖向凸筋(33)的两端部与其相连的两条横向凸筋(32)相垂直。The plate heat exchanger according to claim 1, characterized in that the two ends of the vertical rib (33) are perpendicular to the two transverse ribs (32) connected to it.
  4. 根据权利要求2所述的板式换热器，其特征在于：所述横向凸筋(32)沿板体(30)横向方向被构建为V型或W型；和/或所述竖向凸筋(33)沿板体(30)竖向方向被构建为波浪形或锯齿形。The plate heat exchanger according to claim 2, characterized in that: the transverse ribs (32) are constructed into a V-shape or W-shape along the transverse direction of the plate body (30); and/or the vertical ribs (33) is constructed in a wavy or zigzag shape along the vertical direction of the plate body (30).
  5. 根据权利要求2所述的板式换热器，其特征在于：所述横向凸筋(32)顶面沿其横向延伸方向构建形成有波纹形或锯齿形布置的筋槽(35)，和/或竖向凸筋(33)顶面沿其竖 向延伸方向构建形成有波纹形或锯齿形布置的筋槽(35)。The plate heat exchanger according to claim 2, characterized in that: the top surface of the transverse ribs (32) is formed with rib grooves (35) arranged in a corrugated or zigzag shape along its transverse extension direction, and/or The top surface of the vertical ribs (33) is formed with rib grooves (35) arranged in a corrugated or zigzag shape along its vertical extension direction.
  6. 根据权利要求1所述的板式换热器，其特征在于：所述制冷剂进口(101)与载冷剂出口(202)之间，以及制冷剂出口(102)与载冷剂进口(201)之间均设置有导流区(34)，两个导流区(34)分别处于换热纹理的上下两侧；所述导流区(34)内设置有多条导流凸筋(341)，导流凸筋(341)与横向凸筋(32)中部区域的形状一致，且两端部朝向两侧的制冷剂进口(101)与载冷剂出口(202)，或制冷剂出口(102)与载冷剂进口(201)。The plate heat exchanger according to claim 1, characterized in that: between the refrigerant inlet (101) and the brine refrigerant outlet (202), and between the refrigerant outlet (102) and the brine refrigerant inlet (201) There are flow guide areas (34) between them, and the two flow guide areas (34) are respectively located on the upper and lower sides of the heat exchange texture; a plurality of flow guide convex ribs (341) are provided in the flow guide area (34) , the shape of the guide convex rib (341) is consistent with the middle area of the transverse convex rib (32), and the two ends are facing the refrigerant inlet (101) and secondary refrigerant outlet (202) on both sides, or the refrigerant outlet (102) ) and brine import (201).
  7. 根据权利要求1所述的板式换热器，其特征在于：所述分配板(4)倾斜布置于制冷剂输入通道(103)内部，第一腔室(103a)的口径从外端至内端逐渐变小，第二腔室(103b)的口径从外端至内端逐渐变大；且最外侧制冷剂换热腔的分配孔(31)进口与分配板(4)之间留有间隙。The plate heat exchanger according to claim 1, characterized in that the distribution plate (4) is arranged obliquely inside the refrigerant input channel (103), and the diameter of the first chamber (103a) is from the outer end to the inner end. The diameter of the second chamber (103b) gradually becomes smaller from the outer end to the inner end; and there is a gap between the inlet of the distribution hole (31) of the outermost refrigerant heat exchange chamber and the distribution plate (4).
  8. 根据权利要求7所述的板式换热器，其特征在于：所述制冷剂换热腔的分配孔(31)包括与第二腔室(103b)相通的入口段(311)，以及与制冷剂换热腔相通的出口段(312)；所述入口段(311)的口径小于出口段(312)的口径。The plate heat exchanger according to claim 7, characterized in that: the distribution hole (31) of the refrigerant heat exchange chamber includes an inlet section (311) communicating with the second chamber (103b), and with the refrigerant. The outlet section (312) communicates with the heat exchange chamber; the diameter of the inlet section (311) is smaller than the diameter of the outlet section (312).
  9. 根据权利要求8所述的板式换热器，其特征在于：所述分配孔(31)入口段(311)的孔型为椭圆形或橄榄球型。The plate heat exchanger according to claim 8, characterized in that the hole shape of the inlet section (311) of the distribution hole (31) is oval or rugby-shaped.
  10. 根据权利要求7所述的板式换热器，其特征在于：所述分配板(4)的外端部上设置有封闭第二腔室(103b)外端腔口的封板(42)。The plate heat exchanger according to claim 7, characterized in that: a sealing plate (42) for closing the outer end of the second chamber (103b) is provided on the outer end of the distribution plate (4).
PCT/CN2022/126560 2022-09-23 2022-10-21 Plate heat exchanger WO2024060347A1 (en)

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