Heat exchange element, total heat exchange core, air treatment apparatus, and method for manufacturing heat exchange element

Abstract

A heat exchange element comprises: a heat exchange sheet, which comprises at least a functional layer and a substrate layer; and a frame, which comprises at least one partition rib, and is attached to the heat exchange sheet to support the heat exchange sheet, wherein the functional layer and the substrate layer are arranged in an overlapping manner, such that the heat exchange sheet forms a laminated structure; and the frame is attached to the surface of one side of the substrate layer of the heat exchange sheet. In the heat exchange sheet of this structure, the partition rib in the frame of the heat exchange sheet is disposed only on one side of the substrate layer. Therefore, during an injection molding process for forming the frame, the damage to the functional layer of the heat exchange sheet can be effectively avoided or at least significantly reduced. The present application further relates to a total heat exchange core having the heat exchange element and an air treatment apparatus comprising the total heat exchange core, and further relates to a method for manufacturing the heat exchange element.

Description

Heat exchange element, total heat exchange core, air handling device and method for manufacturing heat exchange element

[0001] The present application belongs to the field of air handling devices, and particularly relates to a heat exchange element, a total heat exchange core composed of the heat exchange element, and an air handling device comprising the total heat exchange core, and a method for manufacturing the heat exchange element.

[0002] In people's living and working places, air handling devices are increasingly applied to adjust indoor air, such as adjusting temperature, humidity and other indexes of indoor air, so as to improve people's thermal comfort.

[0003] Some types of air handling devices, such as total heat exchangers, are provided with a total heat exchange core, and air discharged to the outdoor and air introduced into the indoor can exchange heat and water vapor in the total heat exchange core, so that the air introduced into the indoor has better temperature and humidity conditions. The total heat exchange core is usually formed by stacking a plurality of heat exchange elements, and the stacked heat exchange elements can form air flow channels intersecting with each other in adjacent layers, respectively for air discharged to the outdoor and air introduced into the indoor to pass through, so as to exchange heat or water vapor between the two air flows.

[0004] The heat exchange element comprises a heat exchange sheet and a frame formed on the heat exchange sheet. The heat exchange sheet has a heat exchange or moisture permeable function, allowing water vapor to migrate from one side of the heat exchange sheet to the other side, thereby realizing the water vapor exchange function. The frame serves to support the heat exchange sheet, and the frame further comprises at least one partition rib. The partition rib provides strength to the heat exchange element, so that the heat exchange element is not easily deformed by gravity. On the other hand, air flow channels can be formed between adjacent partition ribs for air to flow through.

[0005] In the existing heat exchange element, the frame comprising the partition rib is provided on both sides of the heat exchange sheet, and the frame is attached to the heat exchange sheet by injection molding or the like. However, if the injection molding temperature of the frame is not controlled within an appropriate range during the process of attaching the frame to the heat exchange sheet, for example, if the injection molding temperature is high, the functional layer such as a moisture permeable film on the heat exchange sheet will be damaged due to heat, thereby causing the function of the heat exchange sheet to be impaired.

[0006] Therefore, in the prior art, there is a need to improve the structure of the heat exchange element of the air handling device, particularly the total heat exchange core, to avoid damaging the function of the heat exchange sheet during the manufacturing process.

[0007] The present application is made to solve the above technical problems in the prior art. The object of the present application is to provide a heat exchange element with improved structure, which helps to reduce the risk of damaging the functionality of the heat exchange element during the manufacturing process of the heat exchange element. The present application also provides a total heat exchange core composed of the heat exchange element and an air handling device including the total heat exchange core, and further provides a manufacturing method of the heat exchange element.

[0008] The heat exchange element of the present application comprises a heat exchange sheet including at least a functional layer and a base material layer, and a frame including at least two partition ribs forming an air flow passage for air to flow through between adjacent partition ribs, the frame being formed on the heat exchange sheet to support the heat exchange sheet. The functional layer is arranged to overlap the base material layer, so that the heat exchange sheet forms a laminated structure, and the frame is formed on a surface of one side of the base material layer of the heat exchange sheet.

[0009] In the heat exchange sheet having the above structure, the partition ribs in the frame of the heat exchange sheet are provided only on one side of the base material layer, so that the damage to the functional layer of the heat exchange sheet can be effectively avoided or at least significantly reduced during the injection molding process of the frame.

[0010] Preferably, a moisture absorbing material is included in the functional layer, so that moisture molecules can be absorbed on the functional layer. Also, the functional layer is provided to block CO2 molecules, viruses and bacteria, etc. Accordingly, a moisture permeable structure is formed on the base material layer, which allows the moisture absorbed on the functional layer to pass through the base material layer. The moisture permeable structure is, for example, a moisture permeable hole formed on the base material layer, etc. The functional layer and the base material layer provided as described above act together to allow the heat exchange sheet to block harmful components such as CO2 molecules, viruses and bacteria, etc. in the air, while allowing moisture and heat, etc. to pass through the heat exchange sheet, so that the air supplied to the indoor space can be effectively treated.

[0011] The thickness of the base material layer should be greater than the thickness of the functional layer, which can give the heat exchange sheet sufficient strength. Preferably, the thickness of the base material layer is 10 to 20 micrometers, and the thickness of the functional layer is 0.5 to 1 micrometer. For example, in a more preferred embodiment, the thickness of the base material layer can be specifically 15 micrometers, and the thickness of the functional layer can be specifically 0.7 micrometer.

[0012] Preferably, the frame further includes a reinforcing rib extending to intersect the partition ribs, the reinforcing rib being formed on the surface of one side of the base material layer of the heat exchange sheet. The provision of the reinforcing rib can improve the structural strength of the heat exchange element, while supporting the heat exchange sheet to prevent the heat exchange sheet from being deformed to affect the heat exchange efficiency.

[0013] Preferably, an indication portion is formed on the heat exchange sheet to indicate the base material layer and the functional layer of the heat exchange sheet.

[0014] More specifically, the indication portion can be formed on one of the substrate layer or the functional layer, and includes at least one of the following structures: a corner missing portion, a protruding point, printed text, a marker symbol.

[0015] By providing the indication portion, it is possible to prevent the frame from being formed on the functional layer of the heat exchange sheet during processing of the heat exchange element, which would result in damage to the functional layer and affect the effect of the heat exchange sheet.

[0016] Preferably, the heat exchange sheet and the frame are integrally formed. This integrated structure is simple and easy to process, and the integrally formed heat exchange sheet and frame can facilitate subsequent stacking of multiple heat exchange elements together to form a total heat exchange core.

[0017] Preferably, the substrate layer is formed of at least one of a metal material, a plastic material, and a fiber material. The metal material may, for example, be an aluminum foil or the like, the plastic material may, for example, be polypropylene, polyethylene, or the like, and the fiber material may, for example, be paper or the like. Alternatively, other materials such as a high polymer material, a molecular sieve, graphene, a zeolite, a modified material, and a composite chemical material can also be used to form the substrate layer.

[0018] Preferably, the reinforcing rib is provided to connect two or more of the partition ribs. Here, the reinforcing rib need not connect all of the partition ribs together. In addition, the reinforcing rib has a width d, and the width d is in the range of 0 mm < d ≤ 5 mm. The reinforcing rib thus provided can increase the strength of the frame while minimizing the contact area between the reinforcing rib and the substrate layer, and can reduce the impact on the airflow passage.

[0019] Preferably, the distance A between two adjacent partition ribs is in the range of 5 mm ≤ A ≤ 15 mm. This range of the distance between the partition ribs can provide the required strength to the frame while effectively reducing the impact on the airflow passage.

[0020] In one specific embodiment, the frame is formed of a plastic material, which may, for example, be at least one of polypropylene, polyethylene, and acrylonitrile-styrene-diene copolymer (ABS).

[0021] Further, the substrate layer in the heat exchange sheet can be made of the same material as the frame, so that when the frame is attached to the substrate layer by heat melting or the like, they can be more easily bonded together.

[0022] Preferably, the frame further includes a bezel on which a barrier is formed. The barrier can function to prevent leakage of the gas in the airflow passage. In addition, in the case where two heat exchange elements are bonded together by an adhesive, the barrier can also function to avoid or at least reduce the risk of overflow of the adhesive onto the heat exchange sheet.

[0023] The application also relates to a total heat exchange core comprising a plurality of the heat exchange elements as described above.

[0024] Specifically, the heat exchange core comprises two types of the heat exchange elements, i.e. the first heat exchange element and the second heat exchange element. Preferably, a protrusion is formed on the frame of the first heat exchange element, and a recess is formed on the frame of the second heat exchange element. The protrusion and the recess are capable of being engaged with each other to form an engagement connection. Further, a first blocking strip is formed on at least one of the protrusion and the recess. When the first heat exchange element and the second heat exchange element are stacked and installed together, the first blocking strip can abut against the recess to form a seal, thereby serving as an anti-glue overflow structure. The anti-glue overflow structure can avoid or at least reduce the risk of adhesive leakage or overflow on the heat exchange fins.

[0025] Further preferably, the anti-glue overflow structure further comprises a second blocking strip. The second blocking strip is formed on at least one of the protrusion and the recess, and the second blocking strip is closer to the inner side of the heat exchange element than the first blocking strip. The second blocking strip helps to further ensure the prevention of adhesive leakage.

[0026] The application also relates to an air treatment device comprising the total heat exchange core as described above. The air treatment device can be, for example, a total heat exchanger, a fresh air machine, a humidifying device, an air conditioner indoor unit with air exchange function, etc.

[0027] The application also relates to a method for manufacturing the heat exchange element, which comprises the following steps:

[0028] a. providing the heat exchange fin, wherein the functional layer and the base material layer are stacked, and the heat exchange fin is placed into a mold;

[0029] b. injection molding into the mold to form a frame combined on the heat exchange fin, wherein the frame is combined on the surface of the side of the base material layer;

[0030] In the injection molding, the temperature of the injection molding material is controlled in the range of 220-290°C, and the cavity temperature of the injection molding mold is controlled in the range of 10-50°C.

[0031] The specific embodiments of the application can be more clearly understood from the structure shown in the accompanying drawings, in which:

[0032] Fig. 1 shows a perspective view of the air treatment device of the application, wherein the air treatment device is in a state that its bottom plate faces upward.

[0033] Fig. 2 shows a bottom view of the air treatment device of Fig. 1, wherein the bottom plate of the air treatment device is removed to expose its internal structure.

[0034] Fig. 3 shows a schematic perspective view of an inner casing of the air handling device of Fig. 1.

[0035] Fig. 4 shows an enlarged view of a total heat exchange core mounting portion provided in the inner casing of Fig. 3.

[0036] Fig. 5 shows a schematic perspective view of a total heat exchange core in the air handling device of Fig. 1.

[0037] Fig. 6 shows a partially exploded schematic view of the total heat exchange core of Fig. 5.

[0038] Fig. 7 shows a schematic perspective view of a heat exchange element of the total heat exchange core.

[0039] Fig. 8 shows a side view of the heat exchange element, in which a laminated structure of the heat exchange element is schematically shown.

[0040] Fig. 9 is a partial enlarged view of portion I in Fig. 7, in which an anti-overflow glue structure on a frame is shown.

[0041] Fig. 10 shows the anti-overflow glue structure in a schematic sectional view.

[0042] For the purpose of facilitating the understanding of the present application, the specific embodiments of the air handling device of the present application and the total heat exchange core and heat exchange element thereof will be described in detail below with reference to the accompanying drawings. It should be understood that the drawings shown in the accompanying drawings are merely the preferred embodiments of the present application, which should not be construed as limiting the scope of the present application. Those skilled in the art can make various obvious modifications, variations, equivalent replacements to the present application on the basis of the embodiments shown in the drawings, and the technical features described in the following different embodiments can be combined with each other arbitrarily without contradiction.

[0043] Fig. 1 shows a schematic perspective view of an air handling device 100 of the present application. The air handling device 100 can be, for example, a total heat exchanger, a fresh air machine, a humidifying device, an air conditioner indoor unit with air exchange function, etc. The air handling device 100 includes a device casing 110 in which components such as a fan, a heat exchanger (e.g. a total heat exchange core) are accommodated in a space defined by the device casing 110. As can be seen in Fig. 1, an installation and maintenance cover plate 111 is formed on the device casing 110, which is openably and closably installed on the device casing 110, thereby allowing opening and closing of a maintenance opening on the device casing 110.

[0044] The installation and maintenance cover plate 111 can be pivotably connected to the equipment housing 110 by means such as a pivot, or can be detachably or openably connected to the equipment housing 110 in other ways known in the art. Generally, the portion of the equipment housing 110 in which the installation and maintenance cover plate 111 is disposed in the installed state is a downwardly facing floor, and in this case, a cover plate anti-falling mechanism, such as a connecting cord, a lock, or the like, is preferably also provided.

[0045] Turning to FIG. 2, the floor of the equipment housing 110 is removed to expose the internal structure of the air handling device 100. Fresh air inlets 112, air supply inlets 113, return air inlets 114, and air exhaust outlets 115 are provided in the opposite side walls of the equipment housing 110. The fresh air inlets 112 and the air exhaust outlets 115 open to the outside, and the air supply inlets 113 and the return air inlets 114 open to the inside. Moreover, the fresh air inlets 112 and the air supply inlets 113 are disposed at two corners of the equipment housing 110 along one diagonal, and the return air inlets 114 and the air exhaust outlets 115 are disposed at two corners of the equipment housing 110 along the other diagonal.

[0046] In addition to the preferred diagonal arrangement described above, the fresh air inlets 112 and the air supply inlets 113 can be arranged non-diagonally, for example, the fresh air inlets 112 and the air supply inlets 113 can be disposed near the two ends of the same side of the equipment housing 110, and the return air inlets 114 and the air exhaust outlets 115 can be disposed near the two ends of the opposite side of the equipment housing 110.

[0047] The air handling device 100 is provided with an air exhaust fan 121 and an air supply fan 122, which can be centrifugal fans. The air exhaust fan 121 is in communication with the air exhaust outlets 115, and the air supply fan 122 is in communication with the air supply inlets 113. Of course, the air exhaust fan 121 can also be disposed near the return air inlets 114, and the air supply fan 122 can be disposed near the fresh air inlets 112, which is also within the scope of the present application.

[0048] The air treatment device 100 further includes a total heat exchange core assembly including a total heat exchange core 200, and can further include a total heat exchange core mounting portion 130 for mounting the total heat exchange core 200 to the device housing 110, various filters and the like provided on the side surfaces of the total heat exchange core 200. The total heat exchange core 200 is located between the fresh air inlet 112 and the supply air outlet 113, and between the return air inlet 114 and the exhaust air outlet 115. In one mode of operation of the air treatment device 100, the exhaust air fan 121 and the supply air fan 122 are turned on, and outdoor air is drawn into the fresh air inlet 112 by the supply air fan 122, flows through the total heat exchange core 200, and is then discharged into the room through the supply air outlet 113. Indoor air is drawn into the return air inlet 114 by the exhaust air fan 121, flows through the total heat exchange core 200, and is then discharged to the outside through the exhaust air outlet 115. As can be seen, the outdoor air and the indoor air cross flow in the total heat exchange core 200, and heat and moisture exchange occurs between them.

[0049] Preferably, a PM2.5 filter 151 is further provided between the total heat exchange core 200 and the supply air fan 122, so that PM2.5 particles in the air can be filtered out before the air enters the room. The PM2.5 filter 151 shown in the figure is generally L-shaped. In other cases, the PM2.5 filter 151 can also be a straight filter.

[0050] Preferably, a primary screen filter 152 is mounted on at least one of the side of the total heat exchange core 200 facing the fresh air inlet 112 and the side facing the return air inlet 114, which can filter out relatively large particles in the air before the air enters the total heat exchange core 200, so as to prevent large particles in the air from damaging the membrane-shaped heat exchange elements in the total heat exchange core 200.

[0051] In addition to the structure shown, the PM2.5 filter 151 and the primary screen filter 152 can also be provided near the fresh air inlet 112. The types of the PM2.5 filter 151 and the primary screen filter 152 can be, for example, activated carbon filter screens, electrostatic dust collection filter screens, and the like.

[0052] Sensors 123 can be further provided between the fresh air inlet 112 and the total heat exchange core 200, and between the return air inlet 114 and the total heat exchange core 200, for detecting the quality of the air entering the air treatment device 100. These sensors include, for example, PM2.5 sensors, CO2, TVOC sensors, formaldehyde sensors, odor sensors, temperature sensors, humidity sensors, and the like.

[0053] Preferably, the air handling device 100 further comprises a falling prevention strip 141, which, in the installed state, presses against the total heat exchange core 200, so that the total heat exchange core 200 can be prevented from falling down accidentally when the installation and maintenance cover plate 111 is opened for maintenance.

[0054] The falling prevention strip 141 can extend along the diagonal of the total heat exchange core 200, and its two ends are fixed on the total heat exchange core mounting portions 130 at the opposite corners of the total heat exchange core 200 along the diagonal. In other exemplary structures, the falling prevention strip 141 can extend parallel to the side edges of the total heat exchange core 200, and its two ends are fixed on the bottom plate of the device housing 110.

[0055] The air handling device 100 can further comprise an inner housing 116 arranged inside the device housing 110, which is preferably made of foamed material, and comprises a plurality of supporting portions, as shown in Fig. 3. Preferably, metal embedded parts 117 can be arranged in the foamed material inner housing 116 for purposes such as wiring. Wire passing grooves 118 can also be arranged in the inner housing 116 for wiring. Further, total heat exchange core mounting portions 130 can also be arranged on the inner housing 116, such as the four total heat exchange core mounting portions 130 shown in Fig. 3, which correspond to the four corners of the total heat exchange core 200 respectively. The total heat exchange core mounting portions 130 can be made of metal material.

[0056] Fig. 4 shows an enlarged view of the total heat exchange core mounting portion 130, in which the core body mounting guide rail 131 and the filter screen mounting guide rail 132 are preferably integrally formed on the total heat exchange core mounting portion 130. The four corner portions of the total heat exchange core 200 can be inserted into the core body mounting guide rail 131 of the corresponding total heat exchange core mounting portion 130, so as to complete the fixed installation of the total heat exchange core 200. The two side edges of the preliminary filter 152 can be inserted into the filter screen mounting guide rail 132 of the corresponding total heat exchange core mounting portion 130, so as to complete the installation of the preliminary filter 152.

[0057] The specific structure of the total heat exchange core 200 and the heat exchange elements constituting the total heat exchange core 200 will be described below with reference to Figs. 5-9.

[0058] The total heat exchange core 200 comprises a plurality of heat exchange elements, specifically, a plurality of first heat exchange elements 221 and a plurality of second heat exchange elements 222, which are alternately and layerwisely arranged. Preferably, the total heat exchange core 200 further comprises a plurality of mounting columns 210, which can pass through the holes on the periphery of the first heat exchange elements 221 and the second heat exchange elements 222, so as to realize the layerwise positioning of the plurality of heat exchange elements. Such structure helps to ensure the accurate positioning between the first heat exchange elements 221 and the second heat exchange elements 222 when the total heat exchange core 200 is assembled and processed.

[0059] The basic structure of the heat exchange element will be described below by taking the first heat exchange element 221 as an example. As shown in FIG. 7, the first heat exchange element 221 comprises a heat exchange sheet 230 and a frame 240 formed on one side of the heat exchange sheet 230, for example, by means of injection molding or the like to be attached to the heat exchange sheet 230, and preferably integrally formed with the heat exchange sheet 230. In addition to injection molding, the frame 240 can also be formed on the heat exchange sheet 230 by means of gluing, hot melting or the like.

[0060] The frame 240 comprises a plurality of partition ribs 241 which can extend substantially in parallel along a first direction to form air flow passages for air flow between two adjacent partition ribs 241. The frame 240 can further comprise a plurality of reinforcing ribs 242 which extend along a second direction intersecting the first direction along which the partition ribs 241 extend, or in other words, each of the reinforcing ribs 242 intersects at least one of the partition ribs 241 and forms an angle other than 0° or 180°. For example, the angle between the partition ribs 241 and the reinforcing ribs 242 is preferably in the range of 45° to 90°, and more preferably, as shown in the figure, the partition ribs 241 and the reinforcing ribs 242 are perpendicular to each other, or in other words, they are mutually perpendicular.

[0061] In the exemplary structure shown in the figure, the heat exchange element is shown as rectangular, and in addition thereto, other shapes of heat exchange elements can also be adopted, for example, square, diamond or the like. For the diamond-shaped heat exchange element, the partition ribs 241 therein can be formed in S-shape to correspondingly form S-shaped air flow passages.

[0062] Further preferably, the frame 240 further comprises a border 243 extending along the peripheral edge of the first heat exchange element 221, and the border 243 has intersections with both the partition ribs 241 and the reinforcing ribs 242.

[0063] The reinforcing ribs 242 are connected between at least two partition ribs 241 to be able to reinforce the partition ribs 241 to prevent the partition ribs 241 from being bent and deformed. The reinforcing ribs 242 are preferably discontinuously arranged to be able to reduce the obstruction or influence on the air flow passages formed between two adjacent partition ribs 241 while reinforcing the structural strength of the frame 240. The width d of the reinforcing ribs 242 can be 0mm < d ≤ 5mm. One preferred example of the width is 3mm.

[0064] Further preferably, the height of the reinforcing ribs 242 is less than the height of the partition ribs 241, i.e. the reinforcing ribs 242 are as thin as possible, thereby further helping to reduce the obstruction to the airflow passages formed between the partition ribs 241, improving the heat exchange efficiency; at the same time, it is also conducive to reducing the height of the heat exchange element, thereby facilitating the reduction of the height of the total heat exchange core, so as to realize the miniaturization and thinning of the total heat exchanger. In addition, under the condition of the same height, as many heat exchange elements as possible can be arranged, which is also conducive to improving the heat exchange efficiency of the total heat exchanger.

[0065] Further, the distance A between the two adjacent partition ribs 241. Preferably, the distance A is in the range of 5mm≤A≤15mm, which balances the structural strength of the frame 240 and prevents obstruction to the airflow passages.

[0066] Preferably, the partition ribs 241, the reinforcing ribs 242 and the frame 243 of the frame 240 are made of the same material, for example, plastic material, examples of which include at least one of polypropylene, polyethylene, acrylonitrile-styrene-butadiene copolymer (ABS).

[0067] The heat exchange sheet 230 is a multi-layer structure, as shown in FIG. 8, which at least includes a substrate layer 231 and a functional layer 232. The substrate layer 231 can be made of at least one of a metal material, such as aluminum foil, and a plastic material, such as polypropylene and polyethylene. Other materials can also be used to form the substrate layer 231, such as high molecular materials, molecular sieves, graphene, zeolites, modified materials and composite chemical materials, etc.

[0068] The functional layer 232 is laminated on the side of the substrate layer 231, thereby forming a laminated structure. The functional layer 232 can be a moisture-permeable layer attached to the substrate layer 231, or a moisture-permeable or other functional coating applied to the substrate layer 231.

[0069] The functional layer 232 preferably includes a selective moisture-absorbing material, which can specifically absorb water molecules and the like in the air, while being arranged to block harmful components such as CO2 molecules, viruses and bacteria.

[0070] In addition, a moisture-permeable structure can be provided on the substrate layer 231, for example, a porous structure including a plurality of moisture-permeable holes through which the water molecules absorbed on the functional layer 232 can pass. That is, the combination of the functional layer 232 and the substrate layer 231 thus arranged allows water to pass through, but blocks harmful components such as CO2 molecules, viruses and bacteria.

[0071] The thickness of the substrate layer 231 is greater than that of the functional layer. For example, the substrate layer 231 typically has a thickness in the range of 10 to 20 microns, for example, the substrate layer 231 can have a thickness of about 15 microns. The thickness of the functional layer 232 is in the range of 0.5 to 1 micron, for example, in one specific example, the functional layer 232 has a thickness of 0.7 microns.

[0072] In the present application, the frame 240, including the partitioning ribs 241 and the optional reinforcing ribs 242, is only attached to the surface of the substrate layer 231 of the heat exchange sheet 230. In this way, the functional layer 232 can be protected from damage during the process of injection molding the frame 240.

[0073] Preferably, the substrate layer 231 can be made of the same material as the frame 240, i.e., the substrate layer is specifically formed of a plastic material such as at least one of polypropylene, polyethylene, acrylonitrile-styrene-diene copolymer (ABS). In this way, the frame 240 and the substrate layer 231 can be more easily bonded together when the frame 240 is formed on the substrate layer 231 by means of heat melting or the like.

[0074] In addition, preferably, an anti-glue overflow structure 244 can be formed on the frame 240 to prevent the adhesive from overflowing onto the heat exchange sheet 230 when the first heat exchange element 221 and the second heat exchange element 222 are attached together. Figure 9 shows a partial enlarged view of portion I in Figure 7, in which the anti-glue overflow structure 244 formed on the frame 240 is shown. The anti-glue overflow structure 244 is formed on a pair of opposite sides of the frame 240. Specifically, as shown in Figure 10, the anti-glue overflow structure 244 includes a protrusion 245 formed on the frame 240 of the first heat exchange element 221 (the upper side in the figure) and a recess 246 formed on the frame 240 of the second heat exchange element 222 (the lower side in the figure). When the first heat exchange element 221 and the second heat exchange element 222 are assembled together, the protrusion 245 and the recess 246 are engaged with each other, forming an engagement connection. A first stop bar 247 is formed on the side of the protrusion 245 facing the recess 246, which abuts on the recess 246, thereby forming a seal to prevent the adhesive from flowing towards the heat exchange sheet 230. A second stop bar 248 is formed on the side of the recess 246 close to the heat exchange sheet 230, which can further prevent the adhesive from overflowing.

[0075] In addition to the anti-glue overflow structure when the two heat exchange elements are bonded together using adhesive, the first stop bar 247 and the second stop bar 248 can further prevent the air flow in the air flow passage from leaking out.

[0076] Preferably, in the present application, in order to improve the structural strength of the heat exchange element, another frame is attached to the surface of the functional layer 232 side of the heat exchange sheet 230, and the frame only includes a frame, and does not include the partition ribs 241 and the reinforcing ribs 242.

[0077] The structure of the heat exchange element is described above by taking the first heat exchange element 221 as an example. The structure of the second heat exchange element 222 is basically similar to that of the first heat exchange element 221, except that the extension directions of the partition ribs 241 in them are different. Among them, the extension direction of the partition ribs 241 in the first heat exchange element 221 is substantially perpendicular to the extension direction of the partition ribs 241 in the second heat exchange element 222.

[0078] The manufacturing method of the heat exchange element (the first heat exchange element 221 and the second heat exchange element 222) of the present application will be described below.

[0079] First, the heat exchange sheet 230 is prepared. Specifically, the base material layer 231 is provided, and then the functional layer 232 is attached to the base material layer 231, or the functional coating layer is coated on the base material layer 231 to form the functional layer 232. In this way, the heat exchange sheet 230 including the laminated structure of at least the base material layer 231 and the functional layer 232 is formed.

[0080] The prepared heat exchange sheet 230 is placed into an injection molding mold. Then, injection molding is performed to form the frame 240 combined on the heat exchange sheet 230. Among them, the gate for injection molding is aligned with the surface of the base material layer 231 side of the heat exchange sheet 230, so that the formed frame 240 is combined on the surface of the base material layer 231 side.

[0081] In order to be able to correctly place the heat exchange sheet 230 into the injection molding mold to ensure that the frame 240 is attached to the surface of the base material layer 231 side, the operator needs to correctly identify the base material layer 231 and the functional layer 232 when loading the heat exchange sheet 230 into the mold. One method of identifying the base material layer 231 and the functional layer 232 is to use an FTIR infrared spectrometer. In addition, when the functional layer 232 has adhesion, the operator can also distinguish the base material layer 231 and the functional layer 232 by touch.

[0082] In addition, an indication part can be preferably formed on the heat exchange sheet 230. The indication part can be provided on one of the base material layer 231 and the functional layer 232 to help identify the base material layer 231 or the functional layer 232 of the heat exchange sheet 230. The indication part can take various forms as long as it can be easily identified by an operator, such as at least one of a missing corner part, a protrusion, printed characters, a mark, and the like. For example, the missing corner part is a missing corner formed in the thickness direction of the heat exchange sheet, and a corresponding shape of an identification part is formed on the frame 240 at the edge frame 243, which is fitted to the indication part on the heat exchange sheet, so that the frame 240 can be prevented from being fitted to the functional layer 232 of the heat exchange sheet 230. Alternatively, a corresponding identification part can be provided on a mold for injection molding, and the missing corner part on the heat exchange sheet can be aligned with the identification part on the mold when the heat exchange sheet is loaded into the mold.

[0083] As an additional embodiment, the injection mold can further include gates that align with the side of the functional layer 232 of the heat exchange sheet 230, and the gates are distributed only on the peripheral edge of the heat exchange sheet 230, and the frame formed only includes the edge frame.

[0084] Further, in the method, the temperature of the injection material for forming the frame is controlled in the range of 220 to 290°C, and the cavity temperature of the injection mold is controlled in the range of 10 to 50°C. Such temperature control can effectively reduce the influence on the heat exchange sheet 230 in the injection molding process.

[0085] As described above, the heat exchange elements can be stacked to form a total heat exchange core, and the total heat exchange core is arranged in the airflow path of an air handling device such as a total heat exchanger, a fresh air machine, an air conditioner indoor unit with air exchange function, and the like, to perform heat exchange treatment on indoor and outdoor air flowing therethrough.

[0086] The heat exchange elements can also be used for humidification, and a plurality of heat exchange elements are stacked to form a humidification core, and the flow channels of adjacent two layers of heat exchange elements pass air and water, respectively; the humidification core is arranged in a humidification device, and when air flows through the humidification core, the water in the water-side channel of the humidification core is entrained into the air-side flow channel, so that the air can be humidified.

[0087] The above-mentioned air handling devices can be used alone or in combination, for example, a humidification device is arranged on the downstream side of the air supply path of a total heat exchanger; the two devices can be integrally arranged or separately arranged.

[0088] 100 air handling device

[0089] 110 device housing

[0090] 111 installation and maintenance cover plate

[0091] 112 fresh air port

[0092] 113 air supply port

[0093] 114 air return port

[0094] 115 air exhaust port

[0095] 116 inner housing

[0096] 117 sheet metal embedded part

[0097] 118 wire passing groove

[0098] 121 air exhaust fan

[0099] 122 air supply fan

[0100] 123 sensor

[0101] 130 total heat exchange core mounting portion

[0102] 131 core body mounting guide rail

[0103] 132 filter screen mounting guide rail

[0104] 141 anti-falling pressure strip

[0105] 151 PM2.5 filter

[0106] 152 preliminary screening filter

[0107] 200 total heat exchange core

[0108] 210 mounting column

[0109] 221 first heat exchange element

[0110] 222 second heat exchange element

[0111] 230 heat exchange sheet

[0112] 231 base material layer

[0113] 232 functional layer

[0114] 240 frame

[0115] 241 partition rib

[0116] 242 reinforcing rib

[0117] 243 frame

[0118] 244 anti-glue overflow structure

[0119] 245 convex portion

[0120] 246 concave portion

[0121] 247 first barrier

[0122] 248 second barrier

Claims

A heat exchange element, the heat exchange element comprising: The heat exchange sheet comprises at least a functional layer and a substrate layer, and a frame comprising at least two partition ribs, a flow channel for air flowing through being formed between adjacent partition ribs, the frame being attached to the heat exchange sheet to support the heat exchange sheet; characterized in that the functional layer and the substrate layer are arranged in an overlapping manner, so that the heat exchange sheet forms a laminated structure, and the frame is formed on a surface of one side of the substrate layer of the heat exchange sheet. The heat exchange element as claimed in claim 1, characterized in that The functional layer comprises a moisture-absorbing material, so that water molecules can be absorbed on the functional layer, and the functional layer is arranged to block CO2 molecules, viruses and bacteria; and the substrate layer comprises a moisture-permeable structure, so that the water molecules absorbed on the functional layer can pass through the substrate layer. The heat exchange element as claimed in claim 1, characterized in that The thickness of the substrate layer is greater than the thickness of the functional layer. The heat exchange element as claimed in claim 3, characterized in that The thickness of the substrate layer is 10-20 microns, and the thickness of the functional layer is 0.5-1 micron. The heat exchange element as claimed in claim 1, characterized in that The frame further comprises a reinforcing rib extending transversely to the partition ribs, the reinforcing rib being attached to the surface of one side of the substrate layer of the heat exchange sheet. The heat exchange element as claimed in claim 1, characterized in that An indicating portion is formed on the heat exchange sheet to indicate the substrate layer or the functional layer of the heat exchange sheet. The heat exchange element as claimed in claim 6, characterized in that The indicating portion is formed on at least one of the substrate layer or the functional layer, and comprises at least one of the following structures: a corner missing portion, a protruding point, printed characters, and a mark symbol. The heat exchange element as claimed in claim 1, characterized in that The heat exchange sheet and the frame are integrally formed. The heat exchange element as claimed in claim 1, characterized in that The substrate layer is formed of at least one of a metal material, a plastic material and a fiber material. The heat exchange element as claimed in claim 5, characterized in that The reinforcing rib is arranged to connect two or more partition ribs. The heat exchange element as claimed in claim 5, characterized in that The distance between adjacent two partition ribs is A, wherein the distance A is in the range of 5mm≤A≤15mm. The heat exchange element as claimed in claim 1, characterized in that The frame is formed of a plastic material. The heat exchange element as claimed in claim 12, characterized in that The substrate layer and the frame are made of the same material. The heat exchange element as claimed in claim 5, characterized in that The frame further comprises a bezel, and a blocking strip is formed on the bezel. A total heat exchange core characterized by The total heat exchange core comprises a plurality of heat exchange elements as claimed in any one of claims 1-14 arranged in a laminated manner. An air treatment device, characterized in that The air treatment device comprises the total heat exchange core as claimed in claim 15. A method of manufacturing a heat exchange element as claimed in claim 1, characterized in that The method comprises the following steps: a. providing the heat exchange sheet, wherein the functional layer and the substrate layer are arranged in an overlapping manner, and the heat exchange sheet is placed into a mold; b. injection molding into the mold to form the frame combined on the heat exchange sheet, wherein the frame is combined on the surface of one side of the substrate layer; wherein when injection molding, the temperature of the injection molding material is controlled in the range of 220-290℃, and the cavity temperature of the injection molding mold is controlled in the range of 10-50℃.

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