Plate type heat exchange module and full-plate type heat exchange unit

Abstract

The plate-type heat exchange module comprises a plurality of heat exchange plate sets, each heat exchange plate set is formed by assembling two heat exchange plates, a first heat exchange space is formed in the two heat exchange plates, a liquid groove is formed in the plate at one end of the upper end and the lower end of each heat exchange plate set, and the heat exchange plate sets are provided with liquid pipes connected to the outside. The external liquid pipe is connected with the liquid tank, the other end of the upper end and the lower end of each heat exchange plate set is provided with a steam port, the upper face, the lower face, the front face and the rear face of each heat exchange plate set are connected with sealing pressing plates, second heat exchange spaces are formed outside the sealing pressing plates and the heat exchange plate sets, and openable water chambers are arranged on the two sides of the plate type heat exchange module and communicated with the second heat exchange spaces. According to the invention, miniaturization and modularization of the absorption heat exchange unit can be realized, the production period can be greatly shortened, the transportation cost is reduced, and the external heat source side can be conveniently cleaned through the openable water chambers on the two sides in case of scaling or filth blockage.

Description

Technical Field

[0001] The present invention relates to the technical field of heating, ventilation and air conditioning, and in particular to a plate heat exchange module and a full-plate heat exchange unit. Background Art

[0002] Traditional absorption chillers and heat pumps, especially lithium bromide absorption chillers, are widely used in the HVAC field because they do not consume electricity, have no moving parts, can make full use of low-grade waste heat, and are safe and reliable in operation. At present, lithium bromide absorption heat pumps and absorption heat exchangers are widely used in centralized heating systems that recover waste steam from power plants or waste heat from circulating water; in addition, various absorption chillers or electric compression units that recover waste heat from industrial fields are also being put into use on a large scale.

[0003] The absorber, evaporator, condenser and generator of the conventional absorption heat exchange unit or the evaporator and condenser of the electric compression unit mainly adopt the shell and tube heat exchange structure, and the heat transfer tube is generally a copper tube or a stainless steel tube, which has a high manufacturing cost; at the same time, due to the large specific volume of water vapor under low pressure and the generally integrated design, the absorption refrigerator (heat pump) is very large, which causes great difficulties in the production, transportation, installation and operation and commissioning of the unit. At the same time, since the external heat source of the traditional absorption heat exchange unit or electric compression unit is in the heat exchange tube, once there is scaling or dirty blockage, the cleaning work is very difficult. Therefore, it is necessary to design a new heat exchange structure to replace the traditional heat exchange tube design, realize the miniaturization and modularization of the unit, and at the same time make it more convenient to clean the external heat source side. Summary of the invention

[0004] The purpose of the present invention is to provide a plate heat exchange module and a full plate heat exchange unit. Through the plate heat exchange design, it can replace the heat exchange tube design of various traditional absorption heat exchange units or electric compression units, realize miniaturization and modularization, and abandon the overall design of traditional absorption heat exchange units.

[0005] According to one object of the present invention, the present invention provides a plate heat exchange module and a full plate heat exchange unit, including multiple heat exchange plate groups, each of the heat exchange plate groups is composed of two heat exchange plate groups, a first heat exchange space is formed inside the two heat exchange plates, a liquid tank is provided on one end plate of the upper and lower ends of the heat exchange plate group, the heat exchange plate group is provided with a liquid pipe connected to an external liquid, the external liquid pipe is connected to the liquid tank, and a steam port is provided at the other end of the upper and lower ends of the heat exchange plate group, and the upper and lower, front and back sides of the multiple heat exchange plate groups are connected with sealing pressure plates, and a second heat exchange space is formed between the sealing pressure plate and the outside of the heat exchange plate group, a refrigerant circulates in the first heat exchange space, and an external heat source medium circulates in the second heat exchange space, and openable water chambers are provided on both sides of the plate heat exchange module, and the openable water chambers are connected to the second heat exchange space.

[0006] Furthermore, the width of the steam port is greater than the width of the first heat exchange space, and the heat exchange plate groups are arranged in a row in a width direction of the steam port.

[0007] Furthermore, one end of the steam port is connected to a steam box, and the steam box is connected to the first heat exchange space through the steam port.

[0008] Furthermore, a supporting structure is fixed around the multiple heat exchange plate groups, the heat exchange plates in two pairs are completely symmetrical structures, the heat exchange plates are a nest structure, a herringbone structure or a corrugated structure, and the heat exchange plates are formed by laser welding, brazing or resistance welding on all sides; the heat exchange plates have supporting points protruding in two directions, and the supporting points are used for mutual support between the two pairs of heat exchange plates and between the heat exchange plate groups.

[0009] Furthermore, the external liquid pipe is connected to a mother pipe, and the mother pipe is communicated with the first heat exchange space through the external liquid pipe.

[0010] Furthermore, there are one or more external liquid pipes on the heat exchange plate group, and the external liquid pipes at corresponding positions are connected to one of the mother pipes.

[0011] Furthermore, it also includes an exhaust system, which includes an internal exhaust pipe, an exhaust outlet pipe and an exhaust manifold. The internal exhaust pipe is arranged at the flow tail of the refrigerant steam in the first heat exchange space, and the exhaust outlet pipe is connected to the exhaust manifold by leading out from the steam port at the lower end.

[0012] According to another object of the present invention, the present invention provides a full plate heat exchange unit, including at least one of a generator, an absorber, a condenser and an evaporator, and the heat exchange structure of the generator, absorber, condenser and evaporator adopts the above-mentioned plate heat exchange module.

[0013] Furthermore, in the plate heat exchange module adopted by the absorber, the external liquid pipe at the upper end serves as the inlet of the concentrated solution, and the steam port at the lower end serves as the inlet of the refrigerant vapor and the outlet of the dilute solution; in the plate heat exchange module adopted by the generator, the external liquid pipe at the upper end serves as the inlet of the dilute solution, and the steam port at the lower end serves as the outlet of the refrigerant vapor and the outlet of the concentrated solution.

[0014] Furthermore, in the plate heat exchange module adopted by the evaporator, the external liquid pipe at the lower end or the upper end serves as the inlet of the refrigerant liquid, and the steam port at the upper end or the lower end serves as the outlet of the refrigerant vapor; in the plate heat exchange module adopted by the condenser, the external liquid pipe at the lower end serves as the outlet of the refrigerant liquid, and the steam port at the upper end serves as the inlet of the refrigerant vapor.

[0015] The technical solution of the present invention, the plate heat exchange module has a simple structure, flexible combination, good heat exchange effect, and low cost, and can realize the miniaturization and modularization of the absorption heat exchange unit. Because the four major components are self-contained and can be produced simultaneously and transported separately, the production cycle can be greatly shortened, the transportation cost can be reduced, and the structural connection of the unit can be adjusted at will to adapt to the on-site space conditions. At the same time, the external heat source all goes through the external second heat exchange space of the heat exchange plate group. If there is scaling or dirt blockage on the external heat source side, it can be conveniently cleaned through the openable water chambers on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of a plate heat exchange module according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of a plate heat exchange module according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a full plate heat exchanger unit according to an embodiment of the present invention;

[0020] In the figure: 1. heat exchange plate group; 2. heat exchange plate; 3. liquid tank; 4. steam port; 5. external liquid pipe; 6. mother pipe; 7. sealing pressure plate; 8. supporting structure: 9. openable water chamber; 10. steam box; 11. exhaust system; 12. internal exhaust pipe; 13. exhaust outlet pipe; 14. exhaust header; A. absorber; G. generator; C. condenser; E. evaporator. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1

[0025] like Figure 1-Figure 3 As shown:

[0026] A plate heat exchange module, comprising a plurality of heat exchange plate groups 1, a sealing pressure plate 7, a support structure 8, an openable water chamber 9 and a steam box 10;

[0027] Each heat exchange plate group 1 is composed of two heat exchange plates 2, and a first heat exchange space is formed inside the heat exchange plate group 1;

[0028] A liquid tank 3 is provided on one of the upper and lower ends of the heat exchange plate group 1, and one end of the liquid tank 3 is connected to an external liquid pipe 5; a steam port 4 with a larger area is provided at the other end of the upper and lower ends of the heat exchange plate group 1;

[0029] The width of the steam port 4 is greater than the width of the first heat exchange space formed by the main plates of the heat exchange plate group 1. The heat exchange plate groups 1 are arranged in parallel in the width direction of the steam port 4, and gaps are formed between the heat exchange plate groups 1.

[0030] The multiple heat exchange plate groups 1 are connected with sealing pressure plates 7 on the top, bottom, front and back sides, forming a second heat exchange space outside the heat exchange plate group 1;

[0031] The plate heat exchange module adopts the refrigerant to go through the first heat exchange space, and the external heat source medium to go through the second heat exchange space;

[0032] Openable water chambers 9 are provided on both sides of the plate heat exchange module, and the openable water chambers 9 are connected to the second heat exchange space of the plate heat exchange module, so as to facilitate cleaning of the external heat source side;

[0033] The plurality of heat exchange plate groups 1 are surrounded by support structures 8 to form a plate heat exchange module with a stable structure; the support structure 8 can be designed in various forms according to the structural strength requirements, such as channel steel or angle steel, or tie rods.

[0034] The two groups of heat exchange plates 2 are completely symmetrical structures, which can be in various forms such as nest structure, herringbone shape, corrugated shape, etc., and are formed by laser welding, brazing or resistance welding on all sides;

[0035] The heat exchange plates 2 have support points protruding in two directions, which are used to support each other between the two groups of heat exchange plates 2 and between the heat exchange plate groups 1;

[0036] The steam box 10 is connected to one end of the steam port 4 and communicates with the first heat exchange space through the steam port 4;

[0037] The external liquid pipe 5 of the heat exchange plate group 1 may include one or more external liquid pipes 5, and the external liquid pipes 5 at corresponding positions are connected to a mother pipe 6, and the mother pipe 6 is connected to the first heat exchange space through the external liquid pipe 5;

[0038] The main pipe 6 can be used as a main liquid inlet pipe. After the fluid enters the main pipe 6, it enters the external liquid pipes 5 of the plurality of heat exchange plate groups 1 respectively, and enters the liquid tank 3 from the external liquid pipes 5. At this time, the liquid tank 3 serves as a liquid distribution tank, so that the fluid enters the first heat exchange space of the heat exchange plate group 1 evenly; the steam port 4 serves as a steam outlet. After the steam comes out of the steam port 4, it enters the steam box 10 and then flows out of the module;

[0039] In addition, the mother pipe 6 can be used as a main liquid outlet pipe, and the liquid enters the liquid tank 3 from the first heat exchange space of the heat exchange plate group 1. At this time, the liquid tank 3 serves as a liquid collecting tank, and the fluid is collected by the liquid tank 3 and enters the external liquid pipe 5, and then flows out through the mother pipe 6; the steam port 4 serves as a steam inlet, and the steam entering the steam box 10 enters the first heat exchange space through the steam port 4;

[0040] The plate heat exchange module may further include an exhaust system 11, which includes an inner exhaust pipe 12, an exhaust outlet pipe 13 and an exhaust header 14; the inner exhaust pipe 12 is arranged at the flow tail of the refrigerant steam in the first heat exchange space, and the exhaust outlet pipe 13 is led out from the steam port 4 and connected to the exhaust header 14;

[0041] The present invention also provides a full plate heat exchange unit, including at least one of a generator G, an absorber A, a condenser C and an evaporator E; the heat exchange structure of the generator G, the absorber A, the condenser C and the evaporator E adopts a plate heat exchange module;

[0042] The absorber A adopts a plate heat exchange module, the external liquid pipe 5 at the upper end serves as the inlet of the concentrated solution, and the steam port 4 at the lower end serves as the inlet of the refrigerant steam and the outlet of the dilute solution;

[0043] The plate heat exchange module used in the absorber A further includes an exhaust system 11, an internal exhaust pipe 12 is arranged at the upper part of the first heat exchange space, and an exhaust outlet pipe 13 is led out from the lower steam port 4 and connected to the exhaust header 14;

[0044] The concentrated solution entering the absorber A enters the liquid tank 3 of each heat exchange plate group 1 through the main pipe 6 and the external liquid pipe 5. The liquid tank 3 serves as a liquid distribution tank. The concentrated solution is evenly distributed to the first heat exchange space in the heat exchange plate group 1 under the action of the liquid tank 3. The refrigerant vapor from the evaporator E enters the first heat exchange space through the steam port 4 from the steam box 10 at the lower end, goes up along the first heat exchange space in the plate, and is absorbed by the concentrated solution flowing down the wall. After the concentrated solution absorbs the refrigerant vapor, it becomes a dilute solution. The formed dilute solution flows out of the first heat exchange space from the steam port 4 at the lower end to the bottom of the steam box 10 of the absorber A, and then flows out of the absorber A. It can be seen that the tail of the refrigerant vapor absorption is at the upper part of the first heat exchange space, so the internal exhaust pipe 12 is set at the upper part.

[0045] Both sides of the absorber are connected to openable water chambers 9, which are connected to the external second heat exchange space between the heat exchange plate groups 1 in the plate heat exchange module. The hot network water enters the second heat exchange space from the corresponding inlet water chamber, absorbs the heat released by the refrigerant steam in the concentrated solution in the first heat exchange space inside the heat exchange plate group 1, and the heated hot network water flows out from the corresponding outlet water chamber.

[0046] The plate heat exchange module adopted by the generator G has an external liquid pipe 5 at the upper end as the inlet of the dilute solution, and a steam port 4 at the lower end as the outlet of the refrigerant steam and the outlet of the concentrated solution;

[0047] The dilute solution entering the generator G enters the liquid tank 3 of each heat exchange plate group 1 through the main pipe 6 and the external liquid pipe 5. The liquid tank 3 serves as a liquid distribution tank. Under the action of the liquid tank 3, the dilute solution is evenly distributed to the first heat exchange space in the heat exchange plate group 1 and flows down along the wall. Under the action of the driving heat source in the second heat exchange space outside the heat exchange plate group 1, refrigerant vapor is generated to form a concentrated solution. The refrigerant vapor and the concentrated solution both flow out from the steam port 4 at the lower end to the steam box 10. The condensed steam enters the condenser C. The formed concentrated solution reaches the bottom of the steam box 10 of the generator G and then flows out of the generator G.

[0048] Both sides of the generator are connected to the openable water chamber 9, which is connected to the external second heat exchange space between the heat exchange plate group 1 in the plate heat exchange module. The driving heat source enters the second heat exchange space from the corresponding inlet water chamber, and the dilute solution in the first heat exchange space inside the heat exchange plate group 1 exchanges heat with the driving heat source. After the driving heat source is cooled, it flows out from the corresponding outlet water chamber.

[0049] The plate heat exchange module used in the condenser C has an external liquid pipe 5 at the lower end as the outlet of the refrigerant liquid, and a steam port 4 at the upper end as the inlet of the refrigerant steam;

[0050] The plate heat exchange module used in the condenser C further includes an exhaust system 11, an internal exhaust pipe 12 is arranged at the lower part of the first heat exchange space, and an exhaust outlet pipe 13 is led out from the upper steam port 4 and connected to the exhaust header 14;

[0051] The refrigerant vapor from the generator G enters the first heat exchange space in each heat exchange plate group 1 through the steam port 4 from the steam box 10 at the upper end of the plate heat exchange module of the condenser C, and condenses under the action of the hot network water in the second heat exchange space outside the heat exchange plate group 1. The formed condensate is collected by the liquid tank 3 at the lower end of the plate heat exchange module, enters the external liquid pipe 5 at the lower end and flows out from the mother pipe 6. It can be seen that the tail of the refrigerant vapor absorption is at the lower part of the first heat exchange space, so the internal exhaust pipe 12 is set at the lower part.

[0052] Both sides of the condenser are connected to an openable water chamber 9, which is connected to the external second heat exchange space between the heat exchange plate group 1 in the plate heat exchange module. The hot network water enters the second heat exchange space from the corresponding inlet water chamber, absorbs the heat released by the condensation of the refrigerant steam in the first heat exchange space inside the heat exchange plate group 1, and the heated hot network water flows out from the corresponding outlet water chamber.

[0053] The plate heat exchange module adopted by the evaporator E has an external liquid pipe 5 at the lower end as the inlet of the refrigerant liquid, and a steam port 4 at the upper end as the outlet of the refrigerant steam;

[0054] The refrigerant liquid from the condenser C enters the liquid tank 3 of each heat exchange plate group 1 through the main pipe 6 at the lower end of the evaporator E plate heat exchange module through the external liquid pipe 5. The liquid tank 3 serves as a liquid distribution tank. Under the action of the liquid tank 3, the refrigerant liquid is evenly distributed in the first heat exchange space in the heat exchange plate group 1, absorbs the heat of the low-temperature heat source in the second heat exchange space outside the heat exchange plate group 1, and evaporates. The formed refrigerant vapor flows out from the steam port 4 at the upper end to the steam box 10, and then enters the absorber A.

[0055] In another preferred embodiment, the evaporator E adopts a plate heat exchange module, the external liquid pipe 5 at the upper end serves as the inlet of the refrigerant liquid, and the steam port 4 at the lower end serves as the outlet of the refrigerant steam;

[0056] The refrigerant liquid from the condenser C enters the liquid tank 3 of each heat exchange plate group 1 through the external liquid pipe 5 from the main pipe 6 at the upper end of the plate heat exchange module of the evaporator E. The liquid tank 3 serves as a liquid distribution tank. Under the action of the liquid tank 3, the refrigerant liquid is evenly distributed in the first heat exchange space in the heat exchange plate group 1, absorbs the heat of the low-temperature heat source in the second heat exchange space outside the heat exchange plate group 1, and evaporates. The formed refrigerant vapor flows out from the steam port 4 at the lower end to the steam box 10, and then enters the absorber A.

[0057] Both sides of the evaporator E are connected to an openable water chamber 9, which is connected to the external second heat exchange space between the heat exchange plate group 1 in the plate heat exchange module. The low-temperature heat source enters the second heat exchange space from the corresponding inlet water chamber, exchanges heat with the refrigerant liquid in the first heat exchange space inside the heat exchange plate group 1 for cooling, and the cooled low-temperature heat source flows out from the corresponding outlet water chamber.

[0058] The generator G, absorber A, condenser C and evaporator E can be single-stage or multi-stage, single-effect or double-effect processes.

[0059] The full plate heat exchange unit of the present invention can be various absorption heat exchange units or electric compression units.

[0060] The plate heat exchange module of the present invention can also be applied to electric compression units, which usually use Freon as a refrigerant, including a compressor, a condenser C, a throttle valve, and an evaporator E. The traditional condenser C and evaporator E both adopt a heat transfer tube design, and the external heat source goes through the heat transfer tube. The unit is large in size, and when scaling or dirty blockage occurs on the external heat source side, the cleaning work is very difficult. The plate heat exchange module provided by the present invention is applied to the condenser C and evaporator E of the electric compression unit to form a full-plate electric compression unit.

[0061] The condenser C of the electric compression unit adopts a plate heat exchange module, the external liquid pipe 5 at the lower end serves as the outlet of the refrigerant liquid, and the steam port 4 at the upper end serves as the inlet of the refrigerant steam;

[0062] The high-temperature and high-pressure refrigerant steam from the compressor enters the first heat exchange space in each heat exchange plate group 1 through the steam port 4 from the steam box 10 at the upper end of the plate heat exchange module of the condenser C, and is condensed under the action of the hot network water in the second heat exchange space outside the heat exchange plate group 1. The formed condensate is collected by the liquid tank 3 at the lower end of the plate heat exchange module, enters the external liquid pipe 5 at the lower end, and flows out from the mother pipe 6.

[0063] Both sides of the condenser are connected to an openable water chamber 9, which is connected to the external second heat exchange space between the heat exchange plate group 1 in the plate heat exchange module. The hot network water enters the second heat exchange space from the corresponding inlet water chamber, absorbs the heat released by the condensation of the refrigerant steam in the first heat exchange space inside the heat exchange plate group 1, and the heated hot network water flows out from the corresponding outlet water chamber.

[0064] The evaporator E of the electric compression unit adopts a plate heat exchange module, the external liquid pipe 5 at the lower end serves as the inlet of the refrigerant liquid, and the steam port 4 at the upper end serves as the outlet of the refrigerant vapor;

[0065] The refrigerant liquid from the condenser C enters the liquid tank 3 of each heat exchange plate group 1 through the external liquid pipe 5 from the main pipe 6 at the lower end of the plate heat exchange module of the evaporator E. The liquid tank 3 serves as a liquid distribution tank. Under the action of the liquid tank 3, the refrigerant liquid is evenly distributed in the first heat exchange space in the heat exchange plate group 1, absorbs the heat of the low-temperature heat source in the second heat exchange space outside the heat exchange plate group 1, and evaporates. The formed refrigerant vapor flows out from the steam port 4 at the upper end to the steam box 10, and then returns to the compressor for pressurization.

[0066] In another preferred embodiment, the plate heat exchange module adopted by the evaporator E has the external liquid pipe 5 at the upper end serving as the inlet of the refrigerant liquid, and the steam port 4 at the lower end serving as the outlet of the refrigerant steam;

[0067] The refrigerant liquid from the condenser C enters the liquid tank 3 of each heat exchange plate group 1 through the external liquid pipe 5 from the main pipe 6 at the upper end of the plate heat exchange module of the evaporator E. The liquid tank 3 serves as a liquid distribution tank. Under the action of the liquid tank 3, the refrigerant liquid is evenly distributed in the first heat exchange space in the heat exchange plate group 1, absorbs the heat of the low-temperature heat source in the second heat exchange space outside the heat exchange plate group 1, and evaporates. The formed refrigerant vapor flows out from the steam port 4 at the lower end to the steam box 10, and then returns to the compressor for pressurization.

[0068] Both sides of the evaporator E are connected to an openable water chamber 9, which is connected to the external second heat exchange space between the heat exchange plate group 1 in the plate heat exchange module. The low-temperature heat source enters the second heat exchange space from the corresponding inlet water chamber, exchanges heat with the refrigerant liquid in the first heat exchange space inside the heat exchange plate group 1 for cooling, and the cooled low-temperature heat source flows out from the corresponding outlet water chamber.

[0069] The present invention provides a plate heat exchange module and a full plate heat exchange unit. Through the plate heat exchange design, the heat exchange tube design of various traditional absorption heat exchange units or electric compression units can be replaced, thereby achieving miniaturization and modularization, and abandoning the overall design of traditional absorption heat exchange units. The production of traditional units must be built from bottom to top like building blocks. The four major components of the present invention are self-contained and can be produced simultaneously and transported separately, which can greatly shorten the production cycle and reduce transportation costs. The structural connection of the unit can be adjusted at will to adapt to the on-site space conditions. At the same time, the external heat source is connected to the openable water chamber by passing through the heat exchange space outside the plate group, so that the cleaning work on the external heat source side can be carried out more conveniently.

[0070] The plate heat exchange module proposed in the present invention has a simple structure, flexible combination, good heat exchange effect and low cost, and can realize the miniaturization and modularization of the absorption heat exchange unit. Because the four major components are self-contained and can be produced simultaneously and transported separately, the production cycle can be greatly shortened, the transportation cost can be reduced, and the structural connection of the unit can be adjusted at will to adapt to the on-site space according to the on-site space conditions; at the same time, the external heat source all goes through the external second heat exchange space of the heat exchange plate group. If there is scaling or dirt blockage on the external heat source side, it can be conveniently cleaned through the openable water chambers on both sides.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plate heat exchange module, characterized in that: The heat exchange plate module comprises a plurality of heat exchange plate groups, each of which is composed of two heat exchange plate groups, a first heat exchange space is formed inside the two heat exchange plates, a liquid tank is provided on one end plate of the upper and lower ends of the heat exchange plate group, the heat exchange plate group is provided with a liquid pipe connected to an external liquid, the external liquid pipe is connected to the liquid tank, a steam port is provided at the other end of the upper and lower ends of the heat exchange plate group, and a sealing pressure plate is connected to the upper and lower sides and the front and rear sides of the plurality of heat exchange plate groups, a second heat exchange space is formed between the sealing pressure plate and the outside of the heat exchange plate group, a refrigerant circulates in the first heat exchange space, an external heat source medium circulates in the second heat exchange space, and openable water chambers are provided on both sides of the plate heat exchange module, and the openable water chambers are communicated with the second heat exchange space.

2. The plate heat exchange module according to claim 1, characterized in that: The width of the steam port is greater than the width of the first heat exchange space, and the heat exchange plate groups are attached and arranged in a row in the width direction of the steam port.

3. The plate heat exchange module according to claim 1, characterized in that: One end of the steam port is connected to a steam box, and the steam box is in communication with the first heat exchange space through the steam port.

4. The plate heat exchange module according to claim 1, characterized in that: A supporting structure is fixed around the multiple heat exchange plate groups, the heat exchange plates in two pairs are completely symmetrical structures, the heat exchange plates are a nest structure, a herringbone structure or a corrugated structure, and the heat exchange plates are formed by laser welding, brazing or resistance welding around them; the heat exchange plates have supporting points protruding in two directions, and the supporting points are used for mutual support between the two pairs of heat exchange plates and between the heat exchange plate groups.

5. The plate heat exchange module according to claim 1, characterized in that: The external liquid pipe is connected to a mother pipe, and the mother pipe is communicated with the first heat exchange space through the external liquid pipe.

6. The plate heat exchange module according to claim 5, characterized in that: There are one or more external liquid pipes on the heat exchange plate group, and the external liquid pipes at corresponding positions are connected to one of the mother pipes.

7. The plate heat exchange module according to claim 1, characterized in that: It also includes an exhaust system, which includes an inner exhaust pipe, an exhaust outlet pipe and an exhaust header. The inner exhaust pipe is arranged at the flow tail of the refrigerant steam in the first heat exchange space, and the exhaust outlet pipe is connected to the exhaust header by leading out from the steam port at the lower end.

8. A full plate heat exchange unit, characterized in that: It comprises at least one of a generator, an absorber, a condenser and an evaporator, and the heat exchange structure of the generator, the absorber, the condenser and the evaporator adopts the plate heat exchange module described in claims 1-7.

9. The full plate heat exchanger unit according to claim 8, characterized in that: The plate heat exchange module adopted by the absorber has an external liquid pipe at the upper end serving as the inlet of the concentrated solution, and a steam port at the lower end serving as the inlet of the refrigerant vapor and the outlet of the dilute solution; the plate heat exchange module adopted by the generator has an external liquid pipe at the upper end serving as the inlet of the dilute solution, and a steam port at the lower end serving as the outlet of the refrigerant vapor and the outlet of the concentrated solution.

10. The full plate heat exchanger unit according to claim 8, characterized in that: The plate heat exchange module adopted by the evaporator has an external liquid pipe at the lower end or the upper end as the inlet of the refrigerant liquid, and a steam port at the upper end or the lower end as the outlet of the refrigerant vapor; the plate heat exchange module adopted by the condenser has an external liquid pipe at the lower end as the outlet of the refrigerant liquid, and a steam port at the upper end as the inlet of the refrigerant vapor.

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