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WO2016034092A1 - 板式换热器 - Google Patents

板式换热器 Download PDF

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Publication number
WO2016034092A1
WO2016034092A1 PCT/CN2015/088599 CN2015088599W WO2016034092A1 WO 2016034092 A1 WO2016034092 A1 WO 2016034092A1 CN 2015088599 W CN2015088599 W CN 2015088599W WO 2016034092 A1 WO2016034092 A1 WO 2016034092A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchange
plate
exchange plate
fluid
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/088599
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English (en)
French (fr)
Inventor
魏文建
张志锋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss Micro Channel Heat Exchanger Jiaxing Co Ltd
Original Assignee
Danfoss Micro Channel Heat Exchanger Jiaxing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Danfoss Micro Channel Heat Exchanger Jiaxing Co Ltd filed Critical Danfoss Micro Channel Heat Exchanger Jiaxing Co Ltd
Publication of WO2016034092A1 publication Critical patent/WO2016034092A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F28D9/0031—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 the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—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 the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes

Definitions

  • the invention relates to the fields of refrigeration, air conditioning, industrial refrigeration, heating, etc., in particular to a plate heat exchanger.
  • Existing fluid dispensing devices can be O-rings, plug-in dispensers, guide tubes, and the like.
  • the holes in the dispensing device are becoming smaller and smaller, which results in high and tight tolerances for the holes. More importantly, it is becoming increasingly difficult to make very small holes under such severe tolerances. Moreover, this also leads to a rapid increase in the cost of the dispensing device.
  • the present invention is directed to providing a special dispensing device to reduce the difficulty of manufacture and the cost of such a device, particularly in the case of products with high precision and low crimp depths.
  • the basic idea of the invention is to reduce the number of dispensers by combining two adjacent fluid channels.
  • the fluid passing through the first dispensing device is divided into two streams and guided by a pilot hole/small port on the second dispensing device Go to each channel.
  • a plate heat exchanger comprising a plate assembly, the plate assembly being provided with two inlet and outlet passages for a working fluid, the plate assembly comprising a first, a first portion having a perimeter of the same shape Second, third and fourth four heat exchange plates, wherein the heat exchange plates are sequentially arranged in a cycle of the first, second, third and fourth heat exchange plates, wherein the first heat exchange plates and the second heat exchange plates a first fluid passage flowing through the first fluid between the heat exchange plates, the third heat exchange plate and the fourth heat exchange plate, and between the second heat exchange plate and the third heat exchange plate, fourth a second fluid passage flowing through the second fluid is disposed between the heat exchange plate and the first heat exchange plate adjacent thereto,
  • the plate assembly further includes at least one separation space that communicates with two adjacent first fluid passages, the separation space being closed for the second fluid passage, and first and second for each separation space
  • the heat exchange plate is disposed on a first side thereof and the third and fourth heat exchange plates are disposed on a second side thereof opposite to the first side.
  • the first and second heat exchange plates for one partition space and the first and second heat exchange plates of the adjacent another partition space are advanced.
  • the outlet passages are connected to each other to form an annular contact portion surrounding the inlet and outlet passages.
  • the separation space is surrounded by a connecting surface of the respective second and third heat exchange plates adjacent to the inlet and outlet passages.
  • the connecting faces of the second heat exchange plate and the third heat exchange plate respectively extend from their first contact positions for closing the second fluid passage to the respective annular contacts, the two Each of the connecting faces is provided with a flow guiding hole to communicate two adjacent first fluid passages.
  • the connecting faces of the second heat exchange plate and the third heat exchange plate respectively extend from their first contact positions for closing the second fluid passage to respective annular contacts
  • the ring Guide grooves are respectively disposed on the contact portions to connect the two adjacent first fluid passages.
  • annular distributor is inserted into each of the partition spaces, the partition space is blocked by the annular distributor into two portions, and a cavity in the annular distributor constitutes a first portion of the partition space.
  • An annular cavity formed between the outer wall of the annular distributor and the corresponding second and third heat exchange plates constitutes a second portion of the separation space,
  • the first fluid from the inlet passage of the inlet and outlet passages first enters the annular distributor and in turn flows through the distribution orifices on the annular distributor, the annular chambers, and the diversion holes on the second and third heat exchanger plates Into the first fluid channel.
  • the upper and lower surfaces of the annular distributor are in sealing connection with the second heat exchange plate and the third heat exchange plate adjacent thereto, respectively.
  • the inlet passage of the inlet and outlet passages is provided with an integral distribution pipe extending therethrough, and the side wall of the distribution pipe is provided with at least one distribution for communicating with each of the separation spaces. hole.
  • connection surface of the second heat exchange plate extends upward from the first contact position And continuing to extend downward toward the inlet and outlet passages after contacting the first heat exchange plate at the annular contact portion until contacting the third heat exchange at a second contact position closer to the inlet and outlet passages than the first contact position a plate, and a connection surface of the third heat exchange plate extends downward from the first contact position, and continues to extend upward toward the inlet and outlet passages after contacting the fourth heat exchange plate at the annular contact portion until The second contact position contacts the second heat exchange plate, so that an annular cavity is formed between the first contact position and the second contact position through the connection surface of the second heat exchange plate and the third heat exchange plate, a connecting surface of the second heat exchange plate and a connecting surface of the third heat exchange plate in the previous cycle form a central cavity formed in the inlet and outlet passages, the central cavity and the annular cavity forming the Separate space
  • the first fluid from the inlet channel sequentially passing
  • the central cavity, the guide groove or the flow guiding hole, the annular cavity, and the flow guiding holes on the second and third heat exchange plates flow into the corresponding first fluid passages.
  • the guide grooves for the second heat exchange plate and the third heat exchange plate for each separation space are disposed at substantially corresponding positions such that they can be formed larger after being joined together Diversion channel.
  • the annular cavity is provided with inflow and outflow throttling portions that significantly reduce the flow area.
  • FIG. 1 is a cross-sectional view of a plate assembly for a plate heat exchanger according to a first embodiment of the present invention
  • Figure 2 is a cross-sectional view of a panel assembly in accordance with a second embodiment of the present invention.
  • Figure 3 is a cross-sectional view of a panel assembly in accordance with a third embodiment of the present invention.
  • Figure 4 is a view of a dispensing tube for use in a plate heat exchanger in accordance with a fourth embodiment of the present invention.
  • Figure 5 is a cross-sectional view of a panel assembly in accordance with a fifth embodiment of the present invention.
  • Figure 6 is a cross-sectional view of a panel assembly in accordance with a sixth embodiment of the present invention.
  • the main idea of the invention is to combine two adjacent fluid passages for the same fluid into one open partition and to open two holes in the inner wall of the partition.
  • Fluid from the inlet conduit enters the separation space, the flow is split and the pores passing through the separation space enter each of the respective fluid passages between the heat exchange plates.
  • a plate heat exchanger including a plate assembly is provided, the plate assembly being provided with inlet and outlet passages for two working fluids.
  • the panel assembly includes first, second, third, and fourth four heat exchange plates having perimeters of the same shape.
  • the heat exchange plates are sequentially disposed in a cycle of the first, second, third, and fourth heat exchange plates. Between the first heat exchange plate and the second heat exchange plate, between the third heat exchange plate and the fourth heat exchange plate, a first fluid passage R through which the first fluid flows, and a second heat exchange plate and A second fluid passage W through which the second fluid flows is disposed between the third heat exchange plates, the fourth heat exchange plate, and the first heat exchange plate adjacent thereto.
  • the plate assembly further includes at least one partition space 11 that communicates with two adjacent first fluid passages R, respectively, the partition space being closed for the second fluid passage, and first for each partition space 11
  • the second heat exchange plate is disposed on a first side thereof and the third and fourth heat exchange plates are disposed on a second side thereof opposite to the first side.
  • FIG. 1 there is shown a structural view of a panel assembly 10 for a plate heat exchanger in accordance with a first embodiment of the present invention.
  • the plate assembly 10 is provided with two inlet and outlet passages 12, 13 for the working fluid.
  • the plate assembly 10 is shown to include several heat exchange plates 1, 2, 3, 4, but those skilled in the art will appreciate that the number of heat exchange plates in the plate assembly 10 can be as desired. Make a choice.
  • the inlet duct 12 of the first fluid R and the outlet duct 13 of the second fluid W are shown in FIG.
  • the plate assembly 10 can also be provided with an outlet for the first fluid R and an inlet for the second fluid W at its proper location as desired. In order to better illustrate the inventive concept of the present invention, only a part of them are shown here.
  • the inlet passage 12 of the first fluid R is taken as an example for description.
  • the second fluid W can also be arranged in such a manner.
  • those skilled in the art can A similar arrangement is made at the position of the outlet passage of the first fluid R and the inlet and outlet passages of the second fluid W, and will not be described in detail herein.
  • the first heat exchange plate 1, the second heat exchange plate 2, the third heat exchange plate 3, and the fourth heat exchange plate 4 have the same periphery, and are sequentially disposed in such a cycle.
  • a gap is formed between the first heat exchange plate 1 and the second heat exchange plate 2 adjacent thereto and between the third heat exchange plate 3 and the fourth heat exchange plate 4 adjacent thereto for allowing
  • a second fluid passage 6 for allowing the second fluid W to flow therethrough is formed between the heat exchange plates 1.
  • each of the heat exchange plates 1, 2, 3, 4 is correspondingly provided with a herringbone wave pattern, a half-human wave pattern, a fishbone pattern, a point wave pattern or a protrusion and pit pattern. It is of course also possible to provide other patterns known in the art.
  • the first, second, third and fourth heat exchange plates 1, 2, 3, 4 may be connected to each other by brazing or bonding.
  • inlet passage 12 of the first fluid R shown in Fig. 1 at least one partition space 11 for respectively communicating the adjacent two first fluid passages 5 is provided. This compartment 11 is closed to the second fluid channel 6. Similarly, in the inlet passage for the second fluid W, a similar separation space can also be provided, which is open to the second fluid passage 6 and closed to the first fluid passage 5.
  • the first and second heat exchange plates 1, 2 are disposed on a first side thereof (for example, the upper side in FIG. 1), and the third and fourth heat exchange plates 3, 4 are disposed On its second side opposite the first side (eg, the lower side in Figure 1).
  • the first and the third and fourth heat exchange plates 3, 4 for one partition space 11 and the other adjacent space are first and
  • the two heat exchange plates 1, 2 are connected to each other at the inlet passage 12 to form an annular contact portion 14 surrounding the inlet passage 12.
  • annular contact portion 14 For simplicity of illustration, only three annular contacts 14 in the inlet channel 12 are shown, as an example.
  • the four heat exchange plates 1, 2, 3, 4 are in contact with each other, for example by crimping, welding or bonding.
  • the partition space 11 is surrounded by the connecting faces of the respective second and third heat exchange plates 2, 3 which extend toward the inlet and outlet passages.
  • the partition space 11 is surrounded by the connecting faces 15 and 16 of the second and third heat exchange plates 2, 3 which extend toward the inlet passage 12.
  • the second heat exchange plate 2 is at a position near the inlet passage 12 (i.e., at the first contact for the second heat exchange plate and the third heat exchange plates 2, 3 for closing the second fluid passage 6)
  • an upwardly extending connecting surface 15 is provided
  • the third heat exchange plate 3 is provided with a downwardly extending connecting surface 16 at a position close to the inlet channel 12 or at the first contact position 21.
  • the two connecting faces 15 and 16 respectively extend from the first contact position 21 of the second and third heat exchange plates to the respective annular contact portions 14 to form a circumference around the inlet passage 12. Ring space.
  • the two connecting faces 15 and 16 are respectively provided with flow guiding holes 151 and 161 to communicate two adjacent first fluid passages 5.
  • openings are also provided at positions corresponding to the inlet passages 12 of the joint faces 15 and 16 to allow fluid such as the first fluid R to enter. It is to each of the partition spaces 11 of the inlet passage 12. That is, each of the partition spaces 11 is open in a direction parallel to the extending direction of the inlet passage 12 to facilitate communication with the inlet passages 12 and/or the adjacent partition spaces 11.
  • the two adjacent first fluid passages 5 can be combined into one open partition space 11 by using the structural arrangement shown in FIG. 1, and two flow guides can be opened on the inner wall of the partition space 11. Holes 151 and 161.
  • the flow guiding holes 151 and 161 may be drilled holes on the respective connecting faces.
  • the joining faces 15 and 16 are integral with the respective heat exchange plates, respectively.
  • the joining faces 15 and 16 may be formed on the heat exchange plate by stamping, crimping or bonding.
  • the number of the flow guiding holes 151 and 161 can be selected according to actual needs.
  • FIG. 2 shows a cross-sectional view of a panel assembly 20 in accordance with a second embodiment of the present invention.
  • the plate assembly 20 is substantially identical to the plate assembly 10 shown in FIG. 1 except that a guide groove for communicating two adjacent first fluid passages is provided on the annular contact portion, not shown in FIG. The diversion hole.
  • the same components as those of FIG. 1 are denoted by the same reference numerals.
  • Guide grooves 153 and 154 are respectively disposed at positions of the annular contact portion 14 adjacent to the upwardly extending connecting surface 15 of the second heat exchange plate 2 and the downwardly extending connecting surface 16 of the third heat exchange plate 3 to connect the two Adjacent first fluid channels 5.
  • the guide grooves 153 and 154 are disposed at the position of the respective corresponding annular contact portions 14 in one example.
  • the guide grooves 153 and 154 may be disposed on the heat exchange plate by stamping, crimping, bonding, or the like in a manner known in the art.
  • a dispenser such as a ring distributor, insert, injector or dispensing tube can be used.
  • ring distributor insert, injector or dispensing tube
  • Figure 3 shows a cross-sectional view of a panel assembly 30 in accordance with a third embodiment of the present invention.
  • the board set shown in Figure 3 The member 30 differs from the plate assembly 10 shown in Fig. 1 only in that an annular distributor 7 is added to each of the compartments 11. Therefore, the same components are labeled with the same reference numerals.
  • annular distributor 7 is inserted into each of the partition spaces 11, and the partition space 11 is blocked by the annular distributor 7 into two parts.
  • the cavity in the annular distributor 7 constitutes the first portion 111 of the partition space 11, and the ring shape
  • An annular cavity 112 formed between the outer wall of the distributor 7 and the corresponding second and third heat exchange plates 2, 3 constitutes a second portion of the compartment 11.
  • At least one distribution hole 71 is provided in each of the annular distributors 7.
  • the first fluid R from the inlet passage 12 will first enter each of the annular distributors 7, followed by the distribution orifices 71 on the annular distributor 7, the annular chambers 112 and the corresponding orifices on the heat exchanger plates. 151 or 161 enters into the corresponding first fluid passage 5.
  • the upper and lower surfaces of the annular distributor 7 are respectively sealingly connected to the second heat exchange plate 2 and the third heat exchange plate 3 adjacent thereto, in particular to the joint surface or edge of the corresponding heat exchanger plate.
  • the location of the annular contact 14 is sealingly connected to seal the corresponding fluid.
  • the first fluid R flowing into the inlet passage 12 is distributed to the annular cavity 112 corresponding to each of the two fluid passages through a first distributor such as the annular distributor 7. Thereafter, the fluid in the annular cavity 112 is diverted into each of the first fluid passages 5 through the flow guiding holes 151, 161 on the heat exchange plates 2, 3.
  • Fig. 4 is a view showing a structural arrangement of a dispensing pipe 8 in a plate assembly for the plate heat exchanger shown in Fig. 1 according to a fourth embodiment of the present invention.
  • the distribution pipe 8 can be disposed in a plurality of compartments 11. Since the distribution pipe 8 extends through all the partition spaces 11 therethrough, the first fluid R from the inlet passage 12 can pass through the distribution hole 81 in the distribution pipe 8 into the cavity of the corresponding partition space 11 other than the distribution pipe. In the space.
  • At least one distribution hole 81 communicating with each of the partition spaces 11 is provided on the side wall of the distribution pipe 8. In this example, at least one row of dispensing holes 81 is provided.
  • the first fluid R entering the inlet passage 12 will first flow into the distribution pipe 8, and will flow into the remaining space of the corresponding partition space 11 through the distribution hole 81 on the distribution pipe 8, and then pass through the space corresponding to the partition space 11.
  • the flow guiding holes on the connecting surface flow into the respective first fluid passages 5.
  • the arrangement form of the distribution pipe 8 is not limited to the above-described example, and may be formed of at least two portions instead of the illustrated one-piece form.
  • Figure 5 shows a cross-sectional view of a panel assembly 40 in accordance with a fifth embodiment of the present invention.
  • the board assembly 40 base This is similar to the board assembly 10 shown in FIG. The difference is that the first fluid R flows from the inlet passage 12 through two split flows into the corresponding first fluid passage 5.
  • the same components of the plate assembly 40 as the plate assembly 10 are labeled with the same reference numerals.
  • connection surface 15 of the second heat exchange plate 2 extends upward from the first contact position 21. And continuing to extend downward toward the inlet passage 12 after contacting the first heat exchange plate 1 at the annular contact portion 14 until reaching the second contact position 22 closer to the inlet passage 12 than the first contact position 21
  • Three heat exchanger plates 3 The connecting face 16 of the third heat exchange plate 3 extends downward from the first contact position 21 and continues to extend upwardly towards the inlet channel 12 after contacting the fourth heat exchange plate 4 at the annular contact 14 until The second heat exchange plate 2 is contacted at the same second contact position. That is, in the cross-sectional view of Fig.
  • the joint surface 15 of the second heat exchange plate 2 extends upward and then extends downward, and the joint surface 16 of the third heat exchange plate 3 extends downward and then extends upward.
  • a substantially rhombic shaped cavity 112 as shown is formed between the first contact location 21 and the second contact location 22 by the connecting faces 15 and 16 of the second heat exchange plate 2 and the third heat exchange plate 3 as shown.
  • the cross section of the cavity 112 on one side of the inlet passage 12 is prismatic, and in fact the cavity 112 is an annular cavity surrounding the inlet passage 12.
  • the connecting surface 15 of the second heat exchange plate 2 and the connecting surface 16 of the third heat exchange plate 3 in the previous cycle form a central cavity 111 in the inlet 12, the central cavity 111 and the ring
  • the cavity 112 constitutes the separation space 11 described.
  • a flow guiding hole 17 is provided in a portion of the connecting surface of the second and third heat exchange plates 2, 3 facing the central cavity 111, and the first fluid R from the inlet passage 12 passes through the central cavity in sequence 111.
  • the flow guiding hole 17, the annular cavity 112, and the flow guiding holes 151, 161 on the second and third heat exchange plates 2, 3 flow into the respective first fluid passages 5.
  • the joint faces 15 and 16 may be formed on the second and third heat exchange plates 2, 3 by punching, crimping or welding.
  • the flow guiding holes 17, 151, 161 are illustrated, the number of them may be set as needed, and is not limited to the illustrated case.
  • Figure 6 shows a cross-sectional view of a panel assembly 50 in accordance with a sixth embodiment of the present invention.
  • the board assembly 50 is substantially similar to the board assembly 10 shown in FIG. The difference is that the first fluid R flows from the inlet passage 12 through two split flows into the corresponding first fluid passage 5.
  • the same components of the plate assembly 50 as the plate assembly 10 are labeled with the same reference numerals.
  • connection surface 15 of the second heat exchange plate 2 extends upward from the first contact position 21. And continuing to extend downward toward the inlet passage 12 after contacting the first heat exchange plate 1 at the annular contact portion 14 until at the first contact position 21
  • the third heat exchange plate 3 is contacted at a second contact location 22 closer to the inlet channel 12.
  • the connecting face 16 of the third heat exchange plate 3 extends downward from the first contact position 21 and continues to extend upwardly towards the inlet channel 12 after contacting the fourth heat exchange plate 4 at the annular contact 14 until The second heat exchange plate 2 is contacted at the same second contact position. That is, in the cross-sectional view of Fig.
  • the joint surface 15 of the second heat exchange plate 2 extends upward and then extends downward, and the joint surface 16 of the third heat exchange plate 3 extends downward and then extends upward.
  • a substantially rhombic shaped cavity 112 as shown is formed between the first contact location 21 and the second contact location 22 by the connecting faces 15 and 16 of the second heat exchange plate 2 and the third heat exchange plate 3 as shown.
  • the cross section of the cavity 112 on one side of the inlet passage 12 is prismatic, and in fact the cavity 112 is an annular cavity surrounding the inlet passage 12.
  • the connecting surface 15 of the second heat exchange plate 2 and the connecting surface 16 of the third heat exchange plate 3 in the previous cycle form a central cavity 111 in the inlet 12, the central cavity 111 and the ring
  • the cavity 112 constitutes the separation space 11 described.
  • Guide grooves 18, 19 are provided on portions of the connecting faces of the second and third heat exchange plates 2, 3 facing the central cavity 111, and the first fluid R from the inlet passage 12 passes through the central cavity in sequence 111.
  • the guide grooves 18, 19, the annular cavity 112, and the flow guiding holes 151, 161 on the second and third heat exchange plates 2, 3 flow into the respective first fluid passages 5.
  • the joint faces 15 and 16 may be formed on the second and third heat exchange plates 2, 3 by punching, crimping or welding.
  • the guide grooves 18, 19 and the flow guiding holes 151, 161 are illustrated, the number of them may be set as needed, and is not limited to the illustrated case.
  • the guide grooves 18, 19 are generally disposed on the wall between the annular cavity 112 and the central cavity 111 of the connecting faces 15 and 16 to introduce fluid from the central cavity 111 into the annular cavity 112. .
  • the guide grooves 18, 19 are disposed at the second contact locations 22 of the attachment faces 15 and 16, and correspond to each other.
  • the two guide grooves 18, 19 can form a larger flow guiding passage after being joined together by means such as welding or bonding.
  • the guide groove 18 on the second heat exchange plate 2 protrudes upward and the guide groove 19 on the third heat exchange plate 3 protrudes downward.
  • the guide grooves 18, 19 or the flow guiding holes 17 on the side of the annular cavity 112 facing the central cavity 111 can be regarded as an inflowing throttling portion which significantly reduces the flow area or such an inflow.
  • the flow guiding holes 151, 161 of the annular cavity 112 facing the other side of the first fluid passage 5 can be regarded as an outflow throttle portion which significantly reduces the flow area or functions as such an outflow throttle portion. In this way, the distribution of the fluid can be improved by providing the inflow throttle or the outflow throttle.
  • the plate assembly of the plate heat exchanger of the present invention is capable of producing at least some of the following advantages:

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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

一种包括板组件（10）的板式换热器，该板组件（10）设有两种工质流体的进出口通道（12，13），板组件（10）包括具有相同周边形状的第一、第二、第三和第四四种换热板（1，2，3，4），其中换热板以第一、第二、第三和第四换热板（1，2，3，4）的循环周期依次设置，其中在第一换热板（1）和第二换热板（2）之间、第三换热板（3）和第四换热板（4）之间设有流过第一流体（R）的第一流体通道（5），且在第二换热板（2）和第三换热板（3）之间、第四换热板（4）和与之相邻的第一换热板（1）之间设有流过第二流体（W）的第二流体通道（6）。板组件（10）还包括分别连通相邻的两个第一流体通道（5）的至少一个分隔空间（11），分隔空间（11）对于第二流体通道（6）是封闭的，并且针对每一分隔空间（11），第一和第二换热板（1，2）布置在其的第一侧而第三和第四换热板（3，4）设置在其的与第一侧相对的第二侧。

Description

板式换热器 技术领域
本发明涉及制冷、空调、工业制冷、加热等领域，尤其涉及板式换热器。
背景技术
对于板式换热器内部的两相流来说，在换热板之间的不同的流体通道之间的流体分配对于实现高的效率和可靠性来说总是挑战。
现有的流体分配装置可以是O形环、插入式分配器、导向管等。但是随着热流和压接深度的减小，分配装置上的孔正变得越来越小，其导致了对于孔的高且严格的公差。更重要的是，在如此苛刻的公差条件下制造非常小的孔正变得越来越难。而且，这也导致了分配装置的成本快速地增加。
随着孔直径的不断减小，越来越难以制造高精确的分配装置，成本变得越来越高。
另一方面，对于低容量和高效率的产品，压接的深度变得越来越小。这使得难以对于每一较小的单个流体通制造大直径的孔。
有鉴于此，确有需要提供一种能够至少部分地解决上述问题的新型的板式换热器。
发明内容
本发明的目的旨在解决现有技术中存在的上述问题和缺陷的至少一个方面。
本发明目的在于通过结合板设计来提供简单且成本低的板式换热器，以改善板通道之间的流体分配。基于此，板式换热器可以在低成本的情况下以高的效率和高的可靠性运行。
我们需要对“如何降低分配器的成本和降低地的制造复杂度”的技术问题给出相应的解决方案。
本发明在于提供一种特殊的分配装置，以降低制造的难度和这样的装置的成本，特别是具有高的精度的产品以及低的压接深度的情况下。
本发明的基本思想是通过结合相邻的两个流体通道来降低分配器的数量。经过第一分配装置的流体被分隔成两个流，并且用第二分配装置上的引导孔/小的端口引导 到每一通道中。
根据本发明的一个方面，提供了一种包括板组件的板式换热器，所述板组件设有两种工质流体的进出口通道，所述板组件包括具有相同形状周边的第一、第二、第三和第四四种换热板，其中所述换热板以第一、第二、第三和第四换热板的循环周期依次设置，其中在第一换热板和第二换热板之间、第三换热板和第四换热板之间设有流过第一流体的第一流体通道，且在第二换热板和第三换热板之间、第四换热板和与之相邻的第一换热板之间设有流过第二流体的第二流体通道，
所述板组件还包括分别连通相邻的两个第一流体通道的至少一个分隔空间，所述分隔空间对于所述第二流体通道是封闭的，并且针对于每一分隔空间第一和第二换热板设置在其的第一侧而第三和第四换热板设置在其的与第一侧相对的第二侧。
在一个实施例中，在至少设置两个分隔空间的情况下，针对于一个分隔空间的第三和第四换热板与相邻的另一分隔空间的第一和第二换热板在进出口通道处彼此连接以形成一围绕所述进出口通道的环形接触部。
在一个实施例中，所述分隔空间由相应的第二和第三换热板的靠近进出口通道的连接面围绕。
在一个实施例中，所述第二换热板和第三换热板的连接面从它们的用于封闭第二流体通道的第一接触位置处分别延伸至各自的环形接触部，所述两个连接面上分别设置有导流孔以连通两个相邻的第一流体通道。
在一个实施例中，所述第二换热板和第三换热板的连接面从它们的用于封闭第二流体通道的第一接触位置处分别延伸至各自的环形接触部，所述环形接触部上分别设置有导沟以连通两个相邻的第一流体通道。
在一个实施例中，所述每一分隔空间内插入一环形分配器，该分隔空间被所述环形分配器阻隔成两个部分，环形分配器内的腔体构成所述分隔空间的第一部分，环形分配器的外壁和对应的第二和第三换热板之间形成的一环形腔体构成所述分隔空间的第二部分，
来自所述进出口通道的进口通道的第一流体首先进入环形分配器，并且依次通过环形分配器上的分配孔、所述环形腔体以及第二和第三换热板上的导流孔流入到第一流体通道内。
在一个实施例中，所述环形分配器的上下表面分别与第二换热板和与之相邻的第三换热板密封连接。
在一个实施例中，所述进出口通道的入口通道内设置有在其中贯穿地延伸的一体式的分配管，所述分配管的侧壁上设置有用于与每一个分隔空间连通的至少一个分配孔。
在一个实施例中，对于处于一换热板循环周期中的所述第二换热板和第三换热板，所述第二换热板的连接面从所述第一接触位置处向上延伸，并且在所述环形接触部处接触到第一换热板之后继续朝向进出口通道向下延伸直至在与第一接触位置相比更靠近进出口通道的第二接触位置处接触第三换热板，而第三换热板的连接面从所述第一接触位置处向下延伸，并且在所述环形接触部处接触到第四换热板之后继续朝向进出口通道向上延伸直至在所述第二接触位置接触第二换热板，从而在所述第一接触位置和第二接触位置之间通过所述第二换热板和第三换热板的连接面形成一环形腔体，同时该第二换热板的连接面与处于上一循环周期中的第三换热板的连接面在进出口通道内形成一中心腔体，该中心腔体与所述环形腔体构成所述的分隔空间；
在所述第二和/或第三换热板的连接面的面向所述中心腔体的部分上设置导流孔或在第二接触位置处设置导沟，来自进口通道的第一流体依次通过所述中心腔体、所述导沟或导流孔、环形腔体以及第二和第三换热板上的导流孔流入到相应的第一流体通道内。
在一个实施例中，针对于每一分隔空间的所述第二换热板和第三换热板上的导沟设置在大致对应的位置处，使得它们在连接在一起之后能够形成更大的导流通道。
在一个实施例中，所述环形腔体设置有使流动面积明显减小的流入和流出节流部。
附图说明
本发明的这些和/或其他方面和优点从下面结合附图对优选实施例的描述中将变得明显和容易理解，其中：
图1是根据本发明的第一实施例的用于板式换热器的板组件的截面视图；
图2是根据本发明的第二实施例的板组件的截面视图；
图3是根据本发明的第三实施例的板组件的截面视图；
图4是根据本发明的第四实施例的用于板式换热器中的分配管的视图；
图5是根据本发明的第五实施例的板组件的截面视图；
图6是根据本发明的第六实施例的板组件的截面视图。
具体实施方式
下面通过实施例，并结合附图1-6，对本发明的技术方案作进一步具体的说明。在说明书中，相同或相似的附图标号指示相同或相似的部件。下述参照附图对本发明实施方式的说明旨在对本发明的总体发明构思进行解释，而不应当理解为对本发明的一种限制。
本发明的主要构思在于将用于同一流体的两个相邻的流体通道结合到一个敞开的分隔空间中，并且在所述分隔空间的内壁上开设两个孔。
来自进口管道的流体进入分隔空间，所述流被分流，并且经过所述分隔空间的孔进入到换热板之间的各自的每个流体通道中。
具体地，如图1-6所示，在本发明的一些实施例中，提供了一种包括板组件的板式换热器，所述板组件设有两种工质流体的进出口通道。所述板组件包括具有相同形状周边的第一、第二、第三和第四四种换热板。所述换热板以第一、第二、第三和第四换热板的循环周期依次设置。在第一换热板和第二换热板之间、第三换热板和第四换热板之间设有流过第一流体的第一流体通道R，且在第二换热板和第三换热板之间、第四换热板和与之相邻的第一换热板之间设有流过第二流体的第二流体通道W。
所述板组件还包括分别连通相邻的两个第一流体通道R的至少一个分隔空间11，所述分隔空间对于所述第二流体通道是封闭的，并且针对于每一分隔空间11第一和第二换热板设置在其的第一侧而第三和第四换热板设置在其的与第一侧相对的第二侧。
如图1所示，其示出了根据本发明的第一实施例中的用于板式换热器的板组件10的结构视图。该板组件10设有两种工质流体的进出口通道12、13。为了便于说明和图示简单，仅示出了板组件10包括几个换热板1、2、3、4，但是本领域技术人员可以理解，板组件10中的换热板的数量可以根据需要进行选择。此外，图1中仅示出了第一种流体R的进口管道12和第二种流体W的出口管道13。显然，板组件10还可以根据需要在其的适当位置处设置第一种流体R的出口和第二种流体W的入口。为了更好地说明本发明的发明构思，在此仅示出了它们中的一部分。
需要说明的是，在下文的描述中，都是以第一流体R的进口通道12为例进行说明。同理，第二流体W也可以以这样的方式进行设置。当然，本领域技术人员可以 在第一流体R的出口通道、第二流体W的进出口通道的位置处进行类似的设置，在此不再详细说明。
在板组件10中，第一换热板1、第二换热板2、第三换热板3和第四换热板4具有相同的周边，并且以这样的循环周期依次设置。这样，就会在第一换热板1和与之相邻的第二换热板2之间以及第三换热板3和与之相邻的第四换热板4之间形成用于允许第一流体R流过的第一流体通道5，同时也会在第二换热板2和与之相邻的第三换热板3以及第四换热板4和与之相邻的第一换热板1之间形成用于允许第二流体W流过的第二流体通道6。
需要说明的是，换热板1、2、3、4的每一个的表面上相应地设置有人字波图案、半人字波图案、鱼骨状图案、点波图案或突出和凹坑图案。当然也可以设置其他本领域中已知的图案。第一、第二、第三和第四换热板1、2、3、4可以通过钎焊或粘结的方式彼此连接。
在图1所示的第一流体R的进口通道12中，还设置有用于分别连通相邻的两个第一流体通道5的至少一个分隔空间11。该分隔空间11对于第二流体通道6是封闭的。同理，在用于第二流体W的进口通道中，也可以设置类似的分隔空间，该分隔空间对于第二流体通道6是连通的而对于第一流体通道5是封闭的。
为了便于描述，进行了以下限定。针对于每一分隔空间11，第一和第二换热板1、2设置在其的第一侧(例如在图1中是上侧)，而第三和第四换热板3、4设置在其的与第一侧相对的第二侧(例如在图1中是下侧)。
如图1所示，在至少设置了两个分隔空间11的情况下，针对于一个分隔空间11的第三和第四换热板3、4与相邻的另一分隔空间的第一和第二换热板1、2在进口通道12处彼此连接以形成一围绕所述进口通道12的环形接触部14。为了图示简单，仅示出了在进口通道12中的三个环形接触部14，作为示例。在该环形接触部14处，四种换热板1、2、3、4彼此相互接触，例如通过压接、焊接或粘结在一起。
分隔空间11由相应的第二和第三换热板2、3的朝向进出口通道处延伸的连接面围绕。在本实施例中，该分隔空间11由第二和第三换热板2、3的朝向进口通道12延伸的连接面15和16围绕。在一个示例中，第二换热板2在靠近进口通道12的位置处(即在用于第二换热板和第三换热板2、3用于封闭第二流体通道6的第一接触位置21处)设置有向上延伸的连接面15，第三换热板3在靠近进口通道12的位置处或在第一接触位置21处设置有向下延伸的连接面16。需要说明的是，此处所述的“向上延伸”或“向下延伸”的含义仅表示他们在总体方向上向上或向下延展，而 不是必须是成一直线地延伸；或者说它们也可以表示向上或向下弯曲地或蜿蜒地延伸的含义。
如上述地，所述两个连接面15和16从所述第二和第三换热板的第一接触位置21处分别延伸至各自的环形接触部14，以形成围绕所述进口通道12的环形空间。所述两个连接面15和16上分别设置有导流孔151和161，以连通两个相邻的第一流体通道5。当然，为了使得分隔空间11与进口通道12连通，所述连接面15和16的与进口通道12相对应的位置上还开设有开口(未图示)，以使得诸如第一流体R的流体进入到进口通道12的各个分隔空间11中。也就是说，每一分隔空间11在平行于进口通道12的延伸方向的方向上是敞开的，以便于连通进口通道12和/或相邻的分隔空间11。
由上述可知，可以利用图1所示的结构布置，将两个相邻的第一流体通道5结合到一个敞开的分隔空间11中，并且在所述分隔空间11的内壁上开设两个导流孔151和161。这样，来自进口通道12的第一流体R的流体进入到各个分隔空间11中，之后越过诸如导流孔151和161流入到各自的第一流体通道5中。该导流孔151和161可以是各自的连接面上的钻孔。另外，在一个示例中，连接面15和16分别与各自的换热板是一体的。所述连接面15和16可以通过冲压、压接或粘结的方式形成在所述换热板上。
另外，导流孔151和161的数量可以根据实际需要进行选择。
图2示出了根据本发明的第二实施例的板组件20的截面视图。该板组件20与图1所示的板组件10大体相同，不同之处仅在于在所述环形接触部上设置用于连通两个相邻的第一流体通道的导沟，不是图1所示的导流孔。在此，与图1相同的部件被用与之相同的附图标记进行标记。
在环形接触部14的靠近第二换热板2的向上延伸的连接面15和第三换热板3的向下延伸的连接面16的位置处分别设置有导沟153和154，以连通两个相邻的第一流体通道5。所述导沟153和154在一个示例中设置在各自对应的环形接触部14的位置处。在此处，所述导沟153和154可以通过冲压、压接、粘结或类似的本领域已知的方式设置在换热板上。
为了改善对于进入不同的分隔空间的第一次流体分配，可以使用诸如环形分配器、插入件、喷射器或分配管等的分配器。以下将着重描述对于图1和2所示的板组件进行的改进。
图3示出了根据本发明的第三实施例的板组件30的截面视图。图3所示的板组 件30与图1所示的板组件10的区别仅在于每个分隔空间11中增设有一个环形分配器7。因此，相同的部件被用相同的参考标记进行标记。
每一分隔空间11内插入一环形分配器7，该分隔空间11被所述环形分配器7阻隔成两个部分，环形分配器7内的腔体构成所述分隔空间11的第一部分111，环形分配器7的外壁和对应的第二和第三换热板2、3之间形成的一环形腔体112构成所述分隔空间11的第二部分。
每个环形分配器7上至少设置一个分配孔71。这样，来自进口通道12的第一流体R将首先进入到各个环形分配器7中，之后依次通过环形分配器7上的分配孔71、环形腔体112以及对应的换热板上的导流孔151或161进入到对应的第一流体通道5内。
在一个示例中，环形分配器7的上下表面分别与第二换热板2和与之相邻的第三换热板3密封连接，尤其是与对应的换热板的连接面或边缘大约在环形接触部14的位置处密封连接，以密封相应的流体。
在图3所示的板组件30中，流入到进口通道12中的第一流体R被通过诸如环形分配器7的第一分配器分配到与每两个流体通道相对应的环形腔体112。之后，处于该环形腔体112中的流体通过所述换热板2、3上的导流孔151、161被分流到每一第一流体通道5中。通过将所述流体的分配分成两个步骤，分配孔和/或导流孔的直径的公差可以被放宽，可以降低制造的成本。更重要的是，分配器的数量可以被减半或更多。
图4示出了根据本发明的第四实施例的用于图1所示的板式换热器的板组件中的分配管8的结构布置的视图。与图3所示的环形分配器的功能相似，可以将该分配管8设置在多个分隔空间11中。由于该分配管8贯穿地延伸通过所有的分隔空间11，所以来自进口通道12的第一流体R能够通过分配管8上的分配孔81进入相应的分隔空间11的除分配管的腔体之外的空间中。分配管8的侧壁上设置有与每个分隔空间11连通的至少一个分配孔81。在本示例中，设置有至少一排分配孔81。这样，进入进口通道12的第一流体R将首先流入到分配管8中，并通过分配管8上的分配孔81流入到相应的分隔空间11的其余空间中，之后通过对应于分隔空间11的连接面上的导流孔流入到各自的第一流体通道5中。
可以理解，分配管8的设置形式不限于上述的示例，也可以是由至少两个部分来形成，而不是图示的一体式的形式。
图5示出了根据本发明的第五实施例的板组件40的截面视图。该板组件40基 本上类似于图1所示的板组件10。其不同之处在于从进口通道12第一流体R经过两次分流流入到对应的第一流体通道5中。板组件40中的与板组件10相同的部件用相同的附图标记进行标记。
具体地，对于处于一换热板循环周期中的所述第二换热板2和第三换热板3，所述第二换热板2的连接面15从第一接触位置21处向上延伸，并且在环形接触部14处接触到第一换热板1之后继续朝向进口通道12向下延伸直至在与第一接触位置21相比更靠近进口通道12的第二接触位置22处接触到第三换热板3。第三换热板3的连接面16从第一接触位置21处向下延伸，并且在所述环形接触部14处接触到第四换热板4之后继续朝向进口通道12向上延伸直至在所述同一第二接触位置处接触到第二换热板2。也就是，在图5的截面视图中，第二换热板2的连接面15先向上延伸之后再向下延伸，而第三换热板3的连接面16先向下延伸之后再向上延伸。从而在第一接触位置21和第二接触位置22之间通过所述第二换热板2和第三换热板3的连接面15和16形成如图所示的大体菱形形状的腔体112。需要说明的是，该腔体112在进口通道12的一侧的截面是棱形的，而实际上该腔体112是围绕进口通道12的环形腔体。同时该第二换热板2的连接面15与处于上一循环周期中的第三换热板3的连接面16在进口12内形成一中心腔体111，该中心腔体111与所述环形腔体112构成所述的分隔空间11。
在所述第二和第三换热板2、3的连接面的面向所述中心腔体111的部分上设置导流孔17，来自进口通道12的第一流体R依次通过所述中心腔体111、所述导流孔17、环形腔体112以及第二和第三换热板2、3上的导流孔151、161流入到各自的第一流体通道5内。
如上所述，连接面15和16可以通过冲压、压接或焊接等方式形成在第二和第三换热板2、3上。虽然图示出导流孔17、151、161，但是它们的数量可以根据需要进行设置，而不限于图示的情形。
图6示出了根据本发明的第六实施例的板组件50的截面视图。该板组件50基本上类似于图1所示的板组件10。其不同之处在于从进口通道12第一流体R经过两次分流流入到对应的第一流体通道5中。板组件50中的与板组件10相同的部件用相同的附图标记进行标记。
具体地，对于处于一换热板循环周期中的所述第二换热板2和第三换热板3，所述第二换热板2的连接面15从第一接触位置21处向上延伸，并且在环形接触部14处接触到第一换热板1之后继续朝向进口通道12向下延伸直至在与第一接触位置21 相比更靠近进口通道12的第二接触位置22处接触到第三换热板3。第三换热板3的连接面16从第一接触位置21处向下延伸，并且在所述环形接触部14处接触到第四换热板4之后继续朝向进口通道12向上延伸直至在所述同一第二接触位置处接触到第二换热板2。也就是，在图6的截面视图中，第二换热板2的连接面15先向上延伸之后再向下延伸，而第三换热板3的连接面16先向下延伸之后再向上延伸。从而在第一接触位置21和第二接触位置22之间通过所述第二换热板2和第三换热板3的连接面15和16形成如图所示的大体菱形形状的腔体112。需要说明的是，该腔体112在进口通道12的一侧的截面是棱形的，而实际上该腔体112是围绕进口通道12的环形腔体。同时该第二换热板2的连接面15与处于上一循环周期中的第三换热板3的连接面16在进口12内形成一中心腔体111，该中心腔体111与所述环形腔体112构成所述的分隔空间11。
在所述第二和第三换热板2、3的连接面的面向该中心腔体111的部分上设置导沟18、19，来自进口通道12的第一流体R依次通过所述中心腔体111、所述导沟18、19、环形腔体112以及第二和第三换热板2、3上的导流孔151、161流入到各自的第一流体通道5内。
如上所述，连接面15和16可以通过冲压、压接或焊接等方式形成在第二和第三换热板2、3上。虽然图示出导沟18、19和导流孔151、161，但是它们的数量可以根据需要进行设置，而不限于图示的情形。
具体地，该导沟18、19大体设置在连接面15和16的位于环形腔体112和该中心腔体111之间的壁面上，以将流体从中心腔体111导入到环形腔体112中。在一个实施例中，导沟18、19设置在连接面15和16的第二接触位置22处，并且相互对应。这样，在通过诸如焊接、粘结的方式连接在一起后，所述两个导沟18、19能够形成更大的导流通道。例如，第二换热板2上的导沟18向上突起而第三换热板3上的导沟19向下突起。
需要说明的是，环形腔体112的面向中心腔体111一侧上的导沟18、19或导流孔17可以看做成使流动面积明显减小的流入节流部或起到这样的流入节流部的作用。环形腔体112的面向第一流体通道5的另一侧上的导流孔151、161可以看做成使流动面积明显减小的流出节流部或起到这样的流出节流部的作用。这样，通过设置流入节流部或流出节流部能改善流体的分布。
综上所述，在本发明的各实施例中，本发明所述的板式换热器的板组件能够至少产生下述优点中的一部分：
1)降低流体分配装置的数量；
2)降低流体分配装置的制造复杂性；
3)降低流体分配装置的成本；
4)改善了板组件的稳定性和性能的一致性；
5)消除了对具有分配装置的小尺寸的产品和产品深度的限制，这导致了更加有效的产品开发。
以上仅为本发明的一些实施例，本领域普通技术人员将理解，在不背离本总体发明构思的原则和精神的情况下，可对这些实施例做出改变，本发明的范围以权利要求和它们的等同物限定。

Claims (11)

  1. 一种包括板组件的板式换热器，所述板组件设有两种工质流体的进出口通道，所述板组件包括具有相同形状周边的第一、第二、第三和第四四种换热板，其中所述换热板以第一、第二、第三和第四换热板的循环周期依次设置，其中在第一换热板和第二换热板之间、第三换热板和第四换热板之间设有流过第一流体的第一流体通道，且在第二换热板和第三换热板之间、第四换热板和与之相邻的第一换热板之间设有流过第二流体的第二流体通道，
    所述板组件还包括分别连通相邻的两个第一流体通道的至少一个分隔空间，所述分隔空间对于所述第二流体通道是封闭的，并且针对于每一分隔空间第一和第二换热板设置在其的第一侧而第三和第四换热板设置在其的与第一侧相对的第二侧。
  2. 根据权利要求1所述的板式换热器，其特征在于，
    在至少设置两个分隔空间的情况下，针对于一个分隔空间的第三和第四换热板与相邻的另一分隔空间的第一和第二换热板在进出口通道处彼此连接以形成一围绕所述进出口通道的环形接触部。
  3. 根据权利要求1或2所述的板式换热器，其特征在于，
    所述分隔空间由相应的第二和第三换热板的靠近进出口通道的连接面围绕。
  4. 根据权利要求2所述的板式换热器，其特征在于，
    所述第二换热板和第三换热板的连接面从它们的用于封闭第二流体通道的第一接触位置处分别延伸至各自的环形接触部，所述两个连接面上分别设置有导流孔以连通两个相邻的第一流体通道。
  5. 根据权利要求2所述的板式换热器，其特征在于，
    所述第二换热板和第三换热板的连接面从它们的用于封闭第二流体通道的第一接触位置处分别延伸至各自的环形接触部，所述环形接触部上分别设置有导沟以连通两个相邻的第一流体通道。
  6. 根据权利要求4所述的板式换热器，其特征在于，
    所述每一分隔空间内插入一环形分配器，该分隔空间被所述环形分配器阻隔成两个部分，环形分配器内的腔体构成所述分隔空间的第一部分，环形分配器的外壁和对应的第二和第三换热板之间形成的一环形腔体构成所述分隔空间的第二部分，
    来自所述进出口通道的进口通道的第一流体首先进入环形分配器，并且依次通过环形分配器上的分配孔、所述环形腔体以及第二和第三换热板上的导流孔流入到第一流体通道内。
  7. 根据权利要求6所述的板式换热器，其特征在于，
    所述环形分配器的上下表面分别与第二换热板和与之相邻的第三换热板密封连接。
  8. 根据权利要求4或5所述的板式换热器，其特征在于，
    所述进出口通道的入口通道内设置有在其中贯穿地延伸的一体式的分配管，所述分配管的侧壁上设置有用于与每一个分隔空间连通的至少一个分配孔。
  9. 根据权利要求4所述的板式换热器，其特征在于，
    对于处于一换热板循环周期中的所述第二换热板和第三换热板，所述第二换热板的连接面从所述第一接触位置处向上延伸，并且在所述环形接触部处接触到第一换热板之后继续朝向进出口通道向下延伸直至在与第一接触位置相比更靠近进出口通道的第二接触位置处接触第三换热板，而第三换热板的连接面从所述第一接触位置处向下延伸，并且在所述环形接触部处接触到第四换热板之后继续朝向进出口通道向上延伸直至在所述第二接触位置接触第二换热板，从而在所述第一接触位置和第二接触位置之间通过所述第二换热板和第三换热板的连接面形成一环形腔体，同时该第二换热板的连接面与处于上一循环周期中的第三换热板的连接面在进出口通道内形成一中心腔体，该中心腔体与所述环形腔体构成所述的分隔空间；
    在所述第二和/或第三换热板的连接面的面向所述中心腔体的部分上设置导流孔或在第二接触位置处设置导沟，来自进口通道的第一流体依次通过所述中心腔体、所述导沟或导流孔、环形腔体以及第二和第三换热板上的导流孔流入到相应的第一流体 通道内。
  10. 根据权利要求5或9所述的板式换热器，其特征在于，
    针对于每一分隔空间的所述第二换热板和第三换热板上的导沟设置在大致对应的位置处，使得它们在连接在一起之后能够形成更大的导流通道。
  11. 根据权利要求9所述的板式换热器，其特征在于，所述环形腔体设置有使流动面积明显减小的流入和流出节流部。
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