WO2017088770A1 - 吸收式制冷单元内置式溶液热交换器、制冷单元和制冷矩阵 - Google Patents

吸收式制冷单元内置式溶液热交换器、制冷单元和制冷矩阵 Download PDF

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Publication number
WO2017088770A1
WO2017088770A1 PCT/CN2016/106963 CN2016106963W WO2017088770A1 WO 2017088770 A1 WO2017088770 A1 WO 2017088770A1 CN 2016106963 W CN2016106963 W CN 2016106963W WO 2017088770 A1 WO2017088770 A1 WO 2017088770A1
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Prior art keywords
solution
heat exchanger
refrigeration unit
absorption refrigeration
built
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PCT/CN2016/106963
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English (en)
French (fr)
Inventor
邱伟
杨如民
武祥辉
武维建
刘彦武
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四川捷元科技有限公司
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Publication of WO2017088770A1 publication Critical patent/WO2017088770A1/zh

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    • 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
    • F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
    • F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62—Absorption based systems

Definitions

  • the invention relates to the field of production of a lithium bromide absorption refrigerating machine, and particularly relates to a small absorption refrigerating machine capable of being a separate unit of a refrigerating matrix, a built-in solution heat exchanger therein, an absorption refrigerating unit and an absorption refrigerating matrix.
  • the absorption chiller has the advantages of energy saving, environmental protection, etc. It is easy to use new energy such as solar energy and industrial waste heat waste heat, and has been continuously developed. Miniaturization and familyization will be another trend after it has been put into industrial applications.
  • the lithium bromide absorption chiller was first used in the industrial field, with large cooling power, large volume and heavy weight. It is made of metal materials. In the process of transforming from the industrial field to the miniaturized household field, its structure, materials and processing methods are basically followed, and it is still made of metal materials.
  • the fuselage material is generally made of carbon steel, and the heat exchange pipes are generally made of copper pipes. material.
  • the solution heat exchanger is also made of the same steel material as the fuselage, and the heat exchange tube bundle is made of a copper tube. This complicated and heavy body design can no longer meet the development of the absorption refrigerator to the family and miniaturization.
  • the present invention aims to provide a solution heat exchanger for an absorption refrigeration unit; the solution heat exchanger is a built-in solution heat exchanger of an absorption refrigeration unit.
  • the so-called absorption refrigeration unit refers to a small lithium bromide absorption chiller with complete refrigeration function, which can be used alone or in combination with the ability to expand into a large-scale refrigeration matrix.
  • the so-called internal solution heat exchanger refers to integration.
  • the body casing of the absorption refrigeration unit provides a flow passage and a heat exchange device for the low temperature dilute solution and the high temperature concentrated solution in the absorption refrigeration unit.
  • An internal refrigeration heat exchanger of an absorption refrigeration unit is disposed in an absorption refrigeration unit for performing heat exchange between a low temperature dilute solution in an absorption refrigeration unit and a high temperature concentrated solution;
  • the solution heat exchanger comprises a casing of a heat exchange wall plate and a solution heat exchanger, and the heat exchange wall plate and the casing together form a concentrated solution and a dilute solution channel;
  • the solution channel is a low temperature dilute solution channel and a high temperature concentrated solution channel which are separated from each other.
  • the low temperature dilute solution channel is provided with an inlet for the inflow of the low temperature dilute solution and an outlet for the outflow;
  • the high temperature concentrated solution channel is provided with an inlet for the inflow of the high temperature concentrated solution and an outlet for the outflow.
  • the heat exchange wall plate is a plurality of thin plates of uniform shape and uniformity, and are disposed at a uniform interval in the inner cavity of the absorption refrigeration unit body.
  • the heat exchange wall plate is a stainless steel plate, and the wall plate is provided with a stamped ridge formed by stamping.
  • the heat exchange wall plate has a rectangular shape, and a gasket is arranged on the edge to achieve the purpose of sealing, and forms a solution passage together with the heat exchange wall plate.
  • the inlet and the outlet of the low temperature dilute solution channel are respectively disposed at a lower left corner and an upper right corner of the built-in solution heat exchanger of the absorption refrigeration unit;
  • the inlet and the outlet of the high-temperature concentrated solution passage are respectively disposed at an upper left corner and a lower right corner of the internal heat exchanger of the absorption refrigeration unit.
  • the gasket is provided with a circular seal at two ports on one diagonal of the built-in solution heat exchanger of the absorption refrigeration unit, blocking the solution flowing through the port and simultaneously turning on the other diagonal Two ports of the line;
  • the circular seals on the gaskets in the adjacent two passages are disposed oppositely to form two spaced apart cold and hot fluid passages that run along the diagonal.
  • the housing of the built-in solution heat exchanger of the absorption refrigeration unit is made of engineering plastic; the heat exchange wall plate is made of stainless steel material.
  • Another object of the present invention is to provide an absorption refrigeration unit provided with an internal refrigeration heat exchanger of an absorption refrigeration unit as described above.
  • a third object of the present invention is to provide an absorption refrigeration matrix comprising a plurality of absorption refrigeration units
  • the absorption refrigeration unit is provided with an absorption refrigeration unit built-in solution heat exchanger as described above.
  • the solution heat exchanger of the small lithium bromide absorption refrigeration unit of the invention has a compact structure, is embedded in the side wall of the fuselage, and becomes a part of the fuselage shell, so that the outer part of the fuselage shell is kept flat, thereby increasing the strength of the fuselage. And does not affect the mutual combination of the refrigeration units, so that the refrigeration unit can be expanded into a large absorption refrigeration matrix with doubled cooling power.
  • 1 is a schematic view showing the external structure of the absorption refrigeration unit and the installation position of the solution heat exchanger in the absorption refrigeration unit of the present invention
  • 2A is a schematic view showing the structure of a solution flow path of the solution heat exchanger of the present invention
  • 2B is a schematic view showing the internal structure of the solution heat exchanger of the present invention.
  • FIG. 2C is a schematic cross-sectional view taken along line C-C of FIG. 2B.
  • 3A and 3B are schematic views showing the structure of a gasket of the present invention.
  • the concentrated solution flows out of the port 202;
  • the concentrated solution goes to the channel 204 of the absorber shell
  • Heat exchange wall plate 220
  • FIG. 1 is a schematic view showing the external structure of an absorption refrigeration unit and a built-in solution heat exchanger 205 of the present invention in an installation position of an absorption refrigeration unit.
  • the lithium bromide absorption refrigeration unit 100 has a rectangular parallelepiped structure and is internally provided with heat exchange members (not shown) such as a regenerator, an evaporator, an absorber, and a condenser.
  • the lithium bromide absorption refrigeration unit 100 uses lithium bromide solution + pure water as the working medium pair, wherein the pure water is the refrigerant water and the lithium bromide solution is the absorption liquid; the pure water evaporates and absorbs heat in the evaporator to realize the cooling function.
  • the refrigerant water is evaporated to heat and becomes a refrigerant vapor.
  • the refrigerant vapor is absorbed by the lithium bromide solution into a portion of the solution which is pumped to the regenerator along with the lithium bromide solution.
  • the regenerator the refrigerant water is heated and regenerated with the solution, and the refrigerant water evaporates from the solution to become a gaseous state. Then, the refrigerant vapor is condensed into a liquid state in the condenser. The refrigerant water that has returned to liquid state returns to the evaporator and absorbs heat again. After the refrigerant water absorbs heat from the liquid-gas phase-liquid phase, the refrigeration cycle continues.
  • the surface of the lithium bromide absorption refrigeration unit 100 is provided with a plurality of surfaces (heat source, cold and negative) a water flow port 105 through which cold water, hot water, and cooling water are connected to each other; the outside water is supplied to the refrigeration unit through the water flow port 105, the cold water required by the regenerator, the cold water required by the evaporator, and the absorber and the condenser The cooling water required.
  • a solution heat exchanger 205 is added to the system, that is, the device shown in the side rectangular region 120 of the absorption refrigeration unit of FIG. 1 (solution heat exchanger 205), and the solution heat exchanger 205 allows The high temperature concentrated solution flowing out of the regenerator exchanges heat with the low temperature dilute solution flowing out of the absorber, thereby increasing the temperature of the dilute solution entering the regenerator and reducing the temperature of the concentrated solution entering the absorber.
  • the solution heat exchanger 205 is disposed inside the side of the absorption refrigeration unit, and the outside is integrally connected to the absorption refrigeration unit.
  • the rectangular area is shown on the outside of the heat exchange wall 220 of the solution heat exchanger 205 (see Figure 2B on the inside); the internal structure of the solution heat exchanger 205 is shown in Figure 2A.
  • FIG. 2A is a schematic view showing the structure of a solution heat exchanger 205 and a solution passage of the present invention.
  • the solution heat exchanger 205 is a rectangular flat box structure, and the inside thereof is arranged at a uniform interval by a plurality of heat exchange walls 220 (see FIG. 2B) to form a plurality of solution channels, that is, mutually spaced dilute solution channels 212. And concentrated solution channel 214.
  • the dilute solution channel 212 and the concentrated solution channel 214 cooperate with the heat exchange wall plate 220 to form a sealed heat exchange space, and the low temperature dilute solution and the high temperature concentrated solution simultaneously contact the heat exchange wall plate 220, and the heat exchange wall plate 220 becomes low temperature. Medium for heat exchange between dilute solutions and high temperature concentrated solutions.
  • the four corners of the solution heat exchanger 205 are also respectively provided with inlets and outlets for the solution channels, respectively: a concentrated solution inlet 206 in the upper left corner, a dilute solution inlet 201 in the lower left corner, a dilute solution outlet 208 in the upper right corner, and a concentrated lower right corner.
  • Solution outlet 202 a concentrated solution inlet 206 in the upper left corner, a dilute solution inlet 201 in the lower left corner, a dilute solution outlet 208 in the upper right corner, and a concentrated lower right corner.
  • the dilute solution from the solution pump 203 enters from the dilute solution inlet 201 in the lower left corner, passes through the dilute solution channel 212 in the solution heat exchanger 205, is sent to the dilute solution outlet 208 in the upper right corner, and then passes through the dilute solution to the regenerator channel. 209.
  • the connection port 210 of the inlet of the regenerator solution dispenser is directed to the regenerator.
  • the concentrated solution returned from the regenerator enters the solution heat exchanger 205 from the concentrated solution inlet 206, passes through the concentrated solution passage 214 in the solution heat exchanger 205, flows to the concentrated solution outlet 202, and passes through the concentrated solution to the absorber.
  • Shell path channel 204, absorber solution dispenser inlet connection port 207 leads to the absorber.
  • FIG. 2B is a schematic view showing the internal structure of the body of the solution heat exchanger 205 of the present invention
  • FIG. 2C is a schematic cross-sectional view taken along line C-C of FIG. 2B.
  • the heat exchange wall plate 220 is rectangular in shape and has the same shape as the solution heat exchanger 205.
  • the stainless steel plate is stamped by a cold pressing process, and the inner surface is stamped to form a plurality of dense vertical and horizontal phases.
  • the ribs 222 are used to support the heat exchange wall 220 to withstand the vacuum pressure and to cause turbulence in the fluid flowing through the ribs 222 to increase the heat transfer coefficient.
  • 3A and 3B are schematic views showing the structure of a gasket 300 of the solution heat exchanger 205 of the present invention.
  • the multilayer heat exchange wall plate 220 and the gasket 300 are combined to form a plurality of closed fluid heat exchange passages.
  • the washer 300 is a rectangle having two circular seals 304 and 308 on the diagonal, and the circular seals in the adjacent two passages are positioned oppositely; for example, in the previous passage
  • the position of the circular seal 304 is the upper left corner and the lower right corner
  • the position of the circular seal 308 of the other passage adjacent thereto is the upper right corner and the lower left corner.
  • the circular seal 304 blocks the two ports of the upper left corner and the lower right corner, and simultaneously turns on the two ports of the lower left corner and the upper right corner; in contrast, the circular seal 308 connects the two ports of the upper left corner and the lower right corner, and simultaneously Block the two ports in the lower left and upper right corners.
  • the solution heat exchanger 205 forms a plurality of channels in which the cold and hot fluids are separated from each other, and the heat exchange surface is composed of the multi-layer heat exchange wall plate 220, thereby increasing the heat exchange area.
  • the flow channel 212 of the cold fluid (dilute solution) in the solution heat exchanger 205 is a rectangular diagonal channel flowing from the dilute solution inlet 201 in the lower left corner to the dilute solution outlet 208 in the upper right corner, due to the gasket 300 in FIG.
  • the blocking of the circular seal 304 does not allow the cold fluid to flow to the port in the upper left or lower right corner.
  • the flow channel 214 of the hot fluid (concentrated solution) in the heat exchanger is a rectangular diagonal passage from the concentrated solution inlet 206 in the upper left corner to the concentrated solution outlet 202 in the lower right corner, due to the circle on the gasket 300 in FIG. Blocking of the shape seal 308, the cold fluid does not flow to the port in the lower left corner or the upper right corner.
  • the body of the solution heat exchanger 205 of the present invention is made of engineering plastic; the heat exchange wall plate 220 is made of stainless steel plate with good corrosion resistance.
  • the solution heat exchanger 205 is thin and can be embedded in The side wall of the absorption refrigeration unit becomes a part of the fuselage, and when the heat exchange function is completed, the cross-sectional shape can also reduce the weight of the body and strengthen the strength of the body.

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

Abstract

一种吸收式制冷单元内置式溶液热交换器（205）及使用该溶液热交换器（205）的吸收式制冷单元和制冷矩阵，该溶液热交换器（205）设置在吸收式制冷单元内，用于将吸收式制冷单元内的低温稀溶液与高温浓溶液进行热交换；包括分别供低温稀溶液与高温浓溶液流入和流出的溶液管道，及用于热交换的传热壁板（220），溶液管道为吸收式制冷单元机身侧板壁内陷形成的凹槽，该凹槽与传热壁板（220）组合形成的供流体流过的通道。该吸收式制冷单元的溶液热交换器结构更紧凑、内嵌在机身侧壁、成为机身壳体的一部分，使机身壳体外部保持平整，起到增加机身强度的作用，且不会影响制冷单元的相互组合，使制冷单元可扩展成制冷功率倍增的大型吸收式制冷矩阵。

Description

吸收式制冷单元内置式溶液热交换器、制冷单元和制冷矩阵 技术领域
本发明涉及溴化锂吸收式制冷机生产领域，特别涉及到能够作为制冷矩阵独立单元的小型吸收式制冷机及其内部的内置式溶液热交换器、吸收式制冷单元和吸收式制冷矩阵。
背景技术
吸收式制冷机具有节能、环保等优点，易于使用太阳能和工业余热废热等新型能源，得到了不断的发展。小型化、家庭化将会是其付诸工业应用领域后的又一趋势。
溴化锂吸收式制冷机最先用于工业领域，制冷功率大、体积大、重量重，采用金属材料加工而成。在从工业领域向小型化的家用领域转化的过程中，其结构、材料和加工方法基本上沿袭下来，仍然是采用金属材料制造，机身材料一般采用碳素钢，换热管道一般采用铜管材料。相应地，溶液热交换器也多由与机身相同的钢材制作壳体，用铜管制作换热管束。这种复杂、沉重的机体设计已经不能满足吸收式制冷机往家庭化、小型化方向的发展。
随着新能源、新材料、新工艺的出现和大量应用，传统的以金属材料为主体的吸收式制冷机开始逐渐被新材料所替代。市场需要更廉价、更轻便、安装扩容更灵活、模块化的吸收式制冷机，其各个部件尽量与机身一体，结构简单，体积紧凑，且运作高效。
发明内容
本发明为了解决以上技术问题，目的之一，在于为吸收式制冷单元提供一种溶液热交换器；所述溶液热交换器是吸收式制冷单元内置式溶液热交换器。所谓吸收式制冷单元，指的是具有完整制冷功能的小型溴化锂吸收式制冷机，可以单独使用，也具备组合扩展成大规模制冷矩阵的能力；所谓内置式溶液热交换器，指的是集成在吸收式制冷单元的机身壳体内，为吸收式制冷单元内的低温稀溶液与高温浓溶液提供流动的通道及进行热交换的设备。
具体技术方案如下：
一种吸收式制冷单元内置式溶液热交换器，设置在吸收式制冷单元内，用于将吸收式制冷单元内的低温稀溶液与高温浓溶液进行热交换；
所述溶液热交换器包括换热壁板与溶液热交换器的壳体，所述换热壁板与壳体共同构成浓溶液与稀溶液通道；
当所述低温稀溶液与高温浓溶液通过不同的通道与所述换热壁板接触时，由所述换热壁板进行热交换。
进一步的，所述溶液通道为相互隔开的低温稀溶液通道和高温浓溶液通道。
进一步的，所述低温稀溶液通道设有供所述低温稀溶液流入的入口和流出的出口；
所述高温浓溶液通道设有供所述高温浓溶液流入的入口和流出的出口。
进一步的，所述换热壁板为多块形状和规格一致的薄板，以均匀的间隔设置在所述吸收式制冷单元机身内腔。
进一步的，所述换热壁板为不锈钢板，该壁板上分布有冲压形成的织纹状凸条。
进一步的，所述换热壁板为矩形，在边沿垫有垫圈，以达到密封的目的，并和所述换热壁板共同形成溶液通道。
进一步的，所述低温稀溶液通道的入口和出口分别设置在所吸收式制冷单元内置式溶液热交换器的左下角和右上角；
所述高温浓溶液通道的入口和出口分别设置在所述吸收式制冷单元内置式溶液热交换器的左上角和右下角。
进一步的，所述垫圈在所述吸收式制冷单元内置式溶液热交换器的一个对角线上两个端口处设置有圆形封口，阻断溶液流经该端口，同时接通另一对角线的两个端口；
相邻两个通道内的垫圈上圆形封口的设置位置相反，以形成两个沿着对角线流动的、相互隔开的冷、热流体通道。
进一步的，所述吸收式制冷单元内置式溶液热交换器的壳体由工程塑料制成；换热壁板采用不锈钢材料制成。
本发明的目的之二，在于提供一种吸收式制冷单元，其设有如前文所述的吸收式制冷单元内置式溶液热交换器。
本发明的目的之三，在于提供一种吸收式制冷矩阵，包括若干个吸收式制冷单元；
所述吸收式制冷单元设有如前文所述的吸收式制冷单元内置式溶液热交换器。
本发明的有益效果在于：
本发明小型溴化锂吸收式制冷单元的溶液热交换器结构更紧凑、内嵌在机身侧壁、成为机身壳体的一部分，使机身壳体外部保持平整，起到增加机身强度的作用，且不会影响制冷单元的相互组合，使制冷单元可扩展成制冷功率倍增的大型吸收式制冷矩阵。
附图说明
图1是本发明吸收式制冷单元外部结构及溶液热交换器在吸收式制冷单元的安装位置示意图；
图2A是本发明的溶液热交换器的溶液流道结构示意图；
图2B是本发明的溶液热交换器内部结构示意图；
图2C是图2B中沿C-C线的剖面结构示意图
图3A、3B是本发明的垫圈结构示意图。
其中，部分标记如下：
水流接口105
稀溶液流入端口201；
浓溶液流出端口202；
溶液泵203；
浓溶液前往吸收器壳程的通道204；
溶液热交换器205；
浓溶液的入口206；
吸收器溶液分配器入口的连接口207；
稀溶液的出口208；
稀溶液前往再生器的通道209；
再生器溶液分配器的入口的连接口210
稀溶液通道212；
浓溶液通道214；
换热壁板220；
凸条222；
垫圈300；
圆形封口304、308。
具体实施方式
附图构成本说明书的一部分；下面将参考附图对本发明的各种具体实施方式进行描述。应能理解的是，为了方便说明，本发明使用了表示方向的术语，诸如“前”、“后”、“上”、“下”、“左”、“右”等来描述本发明的各种示例结构部分和元件，但这些方向术语仅仅是依据附图中所显示的示例方位来确定的。由于本发明所公开的实施例可以按照不同的方向设置，所以这些表示方向的术语只是作为说明而不应视作为限制。在可能的情况下，本发明中使用的相同或者相类似的附图标记，指的是相同的部件。
图1是本发明吸收式制冷单元外部结构及内置式溶液热交换器205在吸收式制冷单元的安装位置示意图。
如图1所示为溴化锂吸收式制冷单元100，其为长方体结构，内部设有再生器、蒸发器、吸收器、冷凝器等热交换部件(图中未示出)。溴化锂吸收式制冷单元100以溴化锂溶液+纯水为工质对，其中纯水为冷媒水，溴化锂溶液为吸收液；纯水在蒸发器中蒸发吸热实现制冷功能。冷媒水吸热蒸发后变为冷媒蒸气。在吸收器中，冷媒蒸气被溴化锂溶液吸收变成溶液的一部分，随着溴化锂溶液一起被泵送到再生器。在再生器中，冷媒水随溶液一起加热再生，冷媒水从溶液中蒸发重新变成气态。接着，在冷凝器中冷媒蒸气被冷凝变成液态。重新变成液态的冷媒水回到蒸发器再次吸热蒸发。经过冷媒水从液态—气态—液态的相变吸热，源源不断的进行制冷循环。其中冷水、热水和冷却水在蒸发器、再生器、吸收器和冷凝器各热交换器管程流动以进行热交换。因而，溴化锂吸收式制冷单元100表面设有多个与外界(热源、冷负 荷等)相互连通的冷水、热水和冷却水出入的水流接口105；外界通过这些水流接口105向制冷单元供应再生器所需要的热水，蒸发器所需要的冷水，以及吸收器和冷凝器所需要的冷却水。
在上述制冷流程中，由于溴化锂稀溶液在吸收器中已被冷却水冷却，温度较低，同时，从再生器流出的浓溶液温度较高，为了节省加热稀溶液的热量以及冷却浓溶液的冷量，提高整个装置的热效率，在系统中增加了一个溶液热交换器205，即图1中吸收式制冷单元侧面矩形区域120所示的装置(溶液热交换器205)，溶液热交换器205让再生器流出的高温浓溶液与吸收器流出的低温稀溶液进行热交换，即可提高稀溶液进入再生器的温度也可降低浓溶液进入吸收器的温度。
图1中，溶液热交换器205设置在吸收式制冷单元侧面内部，外部与吸收式制冷单元连为一体。矩形区域所示的为溶液热交换器205的换热壁板220的外侧(里侧见图2B)；溶液热交换器205内部结构见图2A。
图2A是本发明的溶液热交换器205及溶液通道结构示意图。
溶液热交换器205为一矩形偏平的箱体结构，其内部用多块换热壁板220(见图2B)以均匀的间隔排列，形成多个溶液通道，即相互隔开的稀溶液通道212和浓溶液通道214。稀溶液通道212和浓溶液通道214与换热壁板220配合形成密闭的换热空间，低温的稀溶液和高温的浓溶液同时与换热壁板220接触，换热壁板220即成为低温的稀溶液和高温的浓溶液热交换的媒介。溶液热交换器205的四个角上还分别设有溶液通道的出入口，分别是：左上角的浓溶液入口206、左下角的稀溶液入口201、右上角的稀溶液出口208和右下角的浓溶液出口202。
从溶液泵203出来的稀溶液从左下角的稀溶液入口201进入，经过溶液热交换器205内的稀溶液通道212，送到右上角的稀溶液出口208，再经过稀溶液前往再生器的通道209、再生器溶液分配器的入口的连接口210通往再生器。
与此同时，从再生器返回的浓溶液从浓溶液入口206进入溶液热交换器205，经过溶液热交换器205内的浓溶液通道214，流动到浓溶液出口202，再经过浓溶液前往吸收器壳程的通道204、吸收器溶液分配器入口的连接口 207通往吸收器。
图2B是本发明的溶液热交换器205的本体的内部结构示意图；图2C是图2B中沿C-C线的剖面结构示意图
如图2B、2C所示，换热壁板220为形状与溶液热交换器205相同的矩形，其为不锈钢板经冷压工艺冲压而成，在内表面上冲压形成有若干密集的纵横相间的凸条222，用于支撑换热壁板220以承受真空压力，并使流过凸条222的流体产生紊流以提高传热系数。
图3A、3B是本发明的溶液热交换器205的垫圈300的结构示意图；
在图2C所示的溶液热交换器205，多层换热壁板220及垫圈300组合形成多个密闭的流体换热通道。
如图3A、3B所示，垫圈300为在对角线上设有两个圆形封口304和308的矩形，相邻两个通道内的圆形封口的位置恰好相反；譬如在前一个通道的圆形封口304位置为左上角和右下角，则与之相邻的另一个通道的圆形封口308的位置为右上角和左下角。圆形封口304阻断左上角和右下角的两个端口，同时接通左下角与右上角的两个端口；与之相反，圆形封口308接通左上角与右下角的两个端口，同时阻断左下角与右上角的两个端口。如此布置，溶液热交换器205内形成冷、热流体相互隔开的多个通道，由多层换热壁板220组成换热面，增加了换热面积。
溶液热交换器205中冷流体(稀溶液)的流动通道212为从左下角的稀溶液入口201向右上角的稀溶液出口208流动的矩形的对角线通道，由于图3中的垫圈300上的圆形封口304的阻断，冷流体不会流到左上角或者右下角的端口。
热交换器中热流体(浓溶液)的流动通道214为从左上角的浓溶液入口206向右下角的浓溶液出口202流动的矩形的对角线通道，由于图3中的垫圈300上的圆形封口308的阻断，冷流体不会流到左下角或者右上角的端口。
此外，本发明的溶液热交换器205的本体选用工程塑料；换热壁板220选用耐腐蚀性较好的不锈钢板。溶液热交换器205的厚度很薄，可以暗嵌于 吸收式制冷单元的机身侧壁，成为机身的一部分，在完成换热功能的同时，在截面形状上也可起到减轻机身重量、加强机身强度的作用。
尽管参考附图中出示的具体实施方式将对本发明进行描述，但是应当理解，在不背离本发明教导的精神、范围和背景下，本发明的吸收式制冷单元内置式的溶液热交换器及使用溶液热交换器的吸收式制冷单元和制冷矩阵可以有许多变化形式。本领域技术内普通技术人员还将意识到有不同的方式来改变本发明所公开的实施例中的参数、尺寸，但这均落入本发明和权利要求的精神和范围内。

Claims (11)

  1. 一种吸收式制冷单元内置式溶液热交换器，设置在吸收式制冷单元内，用于将吸收式制冷单元内的低温稀溶液与高温浓溶液进行热交换，其特征在于：
    所述溶液热交换器包括换热壁板与溶液热交换器的壳体，所述换热壁板与壳体共同构成浓溶液与稀溶液通道；
    当低温稀溶液与高温浓溶液通过不同的通道与所述换热壁板接触时，由所述换热壁板进行热交换。
  2. 如权利要求1所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述浓溶液与稀溶液通道为相互隔开的低温稀溶液通道和高温浓溶液通道。
  3. 如权利要求2所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述低温稀溶液通道设有供所述低温稀溶液流入的入口和流出的出口；
    所述高温浓溶液通道设有供所述高温浓溶液流入的入口和流出的出口。
  4. 如权利要求1所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述换热壁板为多块形状和规格一致的板，以均匀的间隔设置在所述吸收式制冷单元机身内腔。
  5. 如权利要求4所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述换热壁板为不锈钢板，该壁板上分布有冲压形成的织纹状凸条。
  6. 如权利要求1、4或5所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述换热壁板为矩形，在边沿垫有垫圈，以达到密封的目的，并和所述换热壁板共同形成所述溶液通道。
  7. 如权利要求3所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述低温稀溶液通道的入口和出口分别设置在所述吸收式制冷单元内置式溶液热交换器的左下角和右上角；
    所述高温浓溶液通道的入口和出口分别设置在所述吸收式制冷单元内置式溶液热交换器的左上角和右下角。
  8. 如权利要求6所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述垫圈在所述吸收式制冷单元内置式溶液热交换器的一个对角线上两个端口处设置有圆形封口，以阻断溶液流经该端口同时接通另一对角线的两个端口；
    相邻两个通道内的垫圈上所述圆形封口的设置位置相反，以形成两个沿着对角线流动的、相互隔开的冷流体通道、热流体通道。
  9. 如权利要求1-8所述的吸收式制冷单元内置式溶液热交换器，其特征在于：
    所述吸收式制冷单元内置式溶液热交换器的壳体由工程塑料制成；换热壁板采用不锈钢材料制成。
  10. 一种吸收式制冷单元，其特征在于：
    设有如权利要求1-9任一项所述的吸收式制冷单元内置式溶液热交换器。
  11. 一种吸收式制冷矩阵，其特征在于：
    包括若干个吸收式制冷单元；
    所述吸收式制冷单元设有如权利要求1-9任一项所述的吸收式制冷单元内置式溶液热交换器。
PCT/CN2016/106963 2015-11-26 2016-11-23 吸收式制冷单元内置式溶液热交换器、制冷单元和制冷矩阵 WO2017088770A1 (zh)

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CN205425504U (zh) * 2015-11-26 2016-08-03 四川捷元科技有限公司 单元组合式制冷矩阵
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CN1323385A (zh) * 1998-10-19 2001-11-21 株式会社荏原制作所 吸收制冷机用溶液热交换器
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