Heat exchange core, fresh air device and fresh air device control method

Abstract

The present invention provides a heat exchange core, a fresh air device and a fresh air device control method, wherein the heat exchange core comprises: a retractable frame; a heat exchange membrane, the heat exchange membrane is arranged on the retractable frame; the retractable frame can be retracted and deformed in the direction of the plane where the heat exchange membrane is located, and the heat exchange membrane is deformed simultaneously with the deformation of the retractable frame. The present invention solves the problem of heat exchange failure caused by ice or dust blocking the air duct of the heat exchange core in the prior art, and the ice and dust are discharged from the heat exchange core to ensure that the heat exchange core can perform reliable heat exchange.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to a heat exchange core, a fresh air device and a fresh air device control method. Background Art

[0002] Fresh air devices are currently widely used in green buildings, transportation hubs, education, medical and other civil comfort occasions. However, when existing fresh air devices are used in northern regions, due to the long winter and cold climate, when the two-way flow fresh air device is running, the return air channel of the core is warm air, and the fresh air side is cold air. During long-term operation, condensation gradually forms on the warm air side, followed by ice, and ice accumulation, which eventually leads to blockage of the air duct and failure of the core heat exchange. When used in areas with high dust content in the air and harsh environment, dust accumulates in the heat exchange channel of the core, which also leads to blockage of the air duct. Therefore, the problem of heat exchange failure caused by ice or dust on the heat exchange core blocking the air duct is a technical problem that needs to be solved urgently in this field. Summary of the invention

[0003] The present invention provides a heat exchange core, a fresh air device and a fresh air device control method to solve the problem in the prior art that the heat exchange core blocks the air duct due to ice or dust, resulting in heat exchange failure.

[0004] A heat exchange core, comprising:

[0005] Retractable frame;

[0006] A heat exchange membrane, wherein the heat exchange membrane is arranged on the retractable frame;

[0007] The retractable frame can be retracted and deformed in the direction of the plane where the heat exchange membrane is located, and the heat exchange membrane is deformed simultaneously with the deformation of the retractable frame.

[0008] The telescopic frame includes a plurality of frames, each of which constitutes a part of the telescopic frame, and the length of the frames is adjustable.

[0009] The heat exchange core also includes an adjustment structure, which is connected to the frame and is used to adjust the length of the frame.

[0010] The adjustment structure includes a base and a radial telescopic mechanism, wherein the base is located in the middle of the telescopic frame, the first end of the radial telescopic mechanism is arranged on the base, and the second end of the radial telescopic mechanism is arranged on the frame.

[0011] The frame includes a telescopic sleeve structure; or the frame is made of a flexible material.

[0012] There are multiple retractable frames, all of which are arranged in parallel, the heat exchange membranes correspond to the retractable frames one by one, and a heat exchange air duct is formed between two adjacent heat exchange membranes.

[0013] The retractable frame is provided with an air outlet communicated with the corresponding heat exchange air duct, and the air outlets of two adjacent retractable frames are arranged in staggered directions.

[0014] An axial telescopic mechanism is connected between two adjacent telescopic frames, and the axial telescopic mechanism is used to adjust the distance between the two adjacent telescopic frames.

[0015] The axial telescopic mechanism comprises a telescopic seat and a telescopic rod. In two adjacent telescopic frames, the telescopic seat is arranged on one telescopic frame, and the telescopic rod is arranged on the other telescopic frame.

[0016] The heat exchange core also includes a rotating mechanism, which is drivingly connected to all the telescopic frames and is used to drive all the telescopic frames to rotate.

[0017] Another aspect of the present invention provides a fresh air device, comprising the above-mentioned heat exchange core.

[0018] The fresh air device comprises a shell, an exhaust air duct is formed in the shell, the heat exchange core is rotatably arranged in the shell, and the heat exchange core can adjust the part communicating with the exhaust air duct.

[0019] The fresh air device also includes an edge seal, which is arranged on the inner surface of the shell and can be sealed and matched with the heat exchange core.

[0020] The fresh air device also includes an end seal, which is arranged on the inner surface of the shell, and the end seal can be sealed and matched with the end of the heat exchange core, and the end seal can be deformed simultaneously with the heat exchange core.

[0021] Another aspect of the present invention provides a fresh air device control method, which is applied to the fresh air device as described above, and the method comprises:

[0022] Detecting operating parameters of the fresh air device;

[0023] Determining whether the heat exchange core meets a preset condition according to the operating parameters; wherein the preset condition includes at least one of the following: a preset ice blocking condition, a preset dust blocking condition;

[0024] If yes, the heat exchange core is controlled to perform a deicing operation or a dust removal operation.

[0025] Controlling the heat exchange core to perform deicing or dust removal operations includes:

[0026] Controlling the heat exchange core to rotate axially;

[0027] The heat exchange core is controlled to perform radial expansion and / or axial expansion to perform de-icing or dust removal.

[0028] Before controlling the heat exchange core to rotate axially, the method further includes: controlling the edge seal of the heat exchange core to release the sealing state;

[0029] After controlling the heat exchange core to perform radial expansion and contraction and axial expansion and contraction, the method further includes: controlling the edge seal of the heat exchange core to restore the sealing state.

[0030] The operating parameters include at least: temperature parameters and pressure parameters; the temperature parameters include at least one of the following: fresh air inlet side temperature, fresh air outlet side temperature; the pressure parameters include at least one of the following: return air side pressure difference, fresh air side pressure difference; the dust blocking conditions include: return air side dust blocking conditions and fresh air side dust blocking conditions;

[0031] The preset ice blocking condition includes: the return air side pressure difference is greater than or equal to a first preset pressure difference, the fresh air inlet side temperature is less than or equal to a preset temperature, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is less than or equal to a first preset temperature difference;

[0032] The dust blocking condition on the return air side includes: the pressure difference on the return air side is greater than or equal to the second preset pressure difference, and the temperature difference between the temperature on the fresh air inlet side and the temperature on the fresh air outlet side is greater than the second preset temperature difference;

[0033] The dust blocking condition on the fresh air side includes: the pressure difference on the fresh air side is greater than or equal to a third preset pressure difference, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is greater than the third preset temperature difference.

[0034] When the heat exchange core meets the preset ice blocking condition,

[0035] Controlling the heat exchange core to perform axial rotation includes: controlling the heat exchange core to rotate clockwise by a first preset angle, so that the heat exchange core rotates from the side facing the return air inlet to the side facing the fresh air outlet;

[0036] Controlling the heat exchange core to perform radial expansion and / or axial expansion includes: controlling the expandable frame of the heat exchange core to expand and contract a first preset number of times, and / or controlling the axial expansion mechanism of the heat exchange core to expand and contract a second preset number of times.

[0037] The dust blocking conditions include: dust blocking conditions on the return air side and dust blocking conditions on the fresh air side;

[0038] When the heat exchange core meets the return air side dust blockage condition, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate counterclockwise by a second preset angle, so that the heat exchange core rotates toward the side of the return air inlet to the return air outlet; controlling the heat exchange core to perform radial expansion and / or axial expansion, including: controlling the expansion and contraction of the retractable frame of the heat exchange core a third preset number of times, and / or controlling the expansion and contraction of the axial expansion mechanism of the heat exchange core a fourth preset number of times;

[0039] When the heat exchange core meets the dust blockage condition on the fresh air side, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate counterclockwise to a third preset angle, so that the heat exchange core rotates toward the side of the fresh air inlet to toward the return air outlet; controlling the heat exchange core to radially expand and / or axially expand and / or expand and contract, including: controlling the retractable frame of the heat exchange core to expand and contract a fifth preset number of times, and / or controlling the axial expansion mechanism of the heat exchange core to expand and contract a sixth preset number of times.

[0040] After controlling the heat exchange core to perform radial expansion and axial expansion, the method further includes:

[0041] The return air outlet and the fresh air inlet are controlled to be closed, the return air inlet and the fresh air outlet are controlled to be opened, a portion of the edge seal between the return air inlet and the fresh air outlet is released from a sealed state, and the fresh air fan is started to run for a first preset time.

[0042] After controlling the heat exchange core to perform radial expansion and axial expansion, the method further includes:

[0043] The return air outlet and the return air inlet are controlled to open, and the exhaust fan is controlled to run at a preset gear for a second preset time.

[0044] Another aspect of the present invention provides a storage medium containing computer executable instructions, which are used to execute the above-mentioned fresh air device control method when executed by a computer processor.

[0045] The heat exchange core, fresh air device and fresh air device control method provided by the present invention utilize a deformable frame to generate deformation so that ice and / or dust on the heat exchange core are broken and dropped off under the action of stress, thereby achieving the purpose of de-icing and dust removal of the heat exchange core. The stress on the ice and dust is further increased by changing the distance between two adjacent deformable frames through an axial telescopic mechanism, thereby further increasing the de-icing and dust removal effect. The rotating mechanism can rotate the heat exchange core so that the ice is overturned or the dust is discharged from the outdoor exhaust port of the fresh air device, thereby ensuring that the ice and dust are discharged from the heat exchange core. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the structure of a heat exchange core provided by an embodiment of the present invention;

[0047] Figure 2 A schematic diagram of the structure of a telescopic frame, a radial telescopic mechanism and an axial telescopic mechanism provided in an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of the structure of the rotating mechanism and the end plate provided in an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of the structure of a fresh air device provided by an embodiment of the present invention;

[0050] Figure 5 is an optional flow chart of a fresh air device control method provided according to an embodiment of the present invention;

[0051] Figure 6 This is another optional flow chart of the fresh air device control method provided according to an embodiment of the present invention.

[0052] In the figure:

[0053] 1. Retractable frame; 10. Heat exchange membrane; 2. Frame; 3. Base; 4. Radial retractable mechanism; 11. Air outlet; 5. Axial retractable mechanism; 6. Rotating mechanism; 9. End plate; 7. Shell; 71. Exhaust duct; 8. Edge seal; 72. Return air inlet; 73. Return air outlet; 75. Fresh air outlet. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0055] like Figures 1 to 4The heat exchange core shown includes: a retractable frame 1; a heat exchange membrane 10, wherein the heat exchange membrane 10 is arranged on the retractable frame 1; the retractable frame 1 can be retracted and deformed in the direction of the plane where the heat exchange membrane 10 is located, and the heat exchange membrane 10 is deformed simultaneously with the deformation of the retractable frame 1. The deformation of the deformable frame causes the ice and / or dust on the heat exchange core to break and fall off under the action of stress, thereby achieving the purpose of deicing and dust removal of the heat exchange core. At the same time, in order to ensure that the heat exchange membrane 10 will not be deformed by the deformation of the retractable frame 1, the heat exchange membrane 10 is configured to be a structure that can be deformed simultaneously, thereby ensuring the reliability of the structure of the heat exchange membrane 10. The deformation of the heat exchange membrane 10 may be that the heat exchange membrane 10 is made of flexible material and deforms itself; the deformation of the heat exchange membrane 10 may also be that part of the heat exchange membrane 10 is accommodated in the retractable frame 1 or part of the heat exchange membrane 10 is accommodated by folding or the like. When the heat exchange membrane 10 needs to be deformed, the accommodated part of the heat exchange membrane 10 can stretch as the retractable frame 1 deforms to achieve the purpose of deformation.

[0056] The retractable frame 1 includes a plurality of frames 2, each of which constitutes at least a portion of the retractable frame 1, and the length of the frames 2 is adjustable. The frames 2 are connected at the ends in the length direction, and when the length of the frames 2 changes, the frame will inevitably deform.

[0057] Preferably, all the frames 2 are connected end to end in sequence.

[0058] The heat exchange core also includes an adjustment structure, which is connected to the frame 2 and is used to adjust the length of the frame 2. Through the control of the adjustment structure, the length adjustment of the frame 2 is controllable, and a power source can be provided for the length adjustment of the frame 2. The adjustment structure can also provide support for the frame 2 to ensure that the position of the frame 2 is reliable.

[0059] The adjustment structure includes a base 3 and a radial telescopic mechanism 4, wherein the base 3 is located in the middle of the telescopic frame 1, the first end of the radial telescopic mechanism 4 is arranged on the base 3, and the second end of the radial telescopic mechanism 4 is arranged on the frame 2. The length of the radial telescopic mechanism 4 changes, and the corresponding position of the frame 2 is driven to move, so as to achieve the purpose of stretching the frame 2. Preferably, the radial telescopic mechanism 4 is hingedly arranged on the base 3, and the radial telescopic mechanism 4 and the frame 2 are also hingedly arranged, so as to ensure that the radial telescopic mechanism 4 is still reliably connected with the base 3 and the frame 2 after the length of the frame 2 changes.

[0060] Optionally, the number of the frame 2 is four, the four frames 2 together enclose the telescopic frame 1, and a connection position is formed between two adjacent frames 2, the number of the radial telescopic mechanisms 4 is four, and the second end of one radial telescopic mechanism 4 is correspondingly arranged at one of the connection positions. That is, the cross-section of the telescopic frame 1 at this time is a rectangle, and the second ends of the radial telescopic mechanisms 4 are connected to the top corners of the rectangle. When the position of the second end of the radial telescopic mechanism 4 changes, the two sides of the rectangle can be driven to telescope at the same time, and the second end of the radial telescopic mechanism 4 is connected to the top corner of the rectangle, which can further ensure the reliability of the connection between the radial telescopic mechanism 4 and the frame 2.

[0061] Among them, the radial telescopic mechanism 4 includes a telescopic seat and a telescopic rod. The telescopic rod is movably arranged on the telescopic seat, and the telescopic rod can adjust the length of the telescopic seat. The telescopic seat is arranged on the base 3, and the end of the telescopic rod away from the telescopic seat is connected to the frame 2.

[0062] The frame 2 includes a telescopic sleeve structure, that is, the inner sleeve is gradually pulled out from the outer sleeve as needed to achieve length adjustment.

[0063] Alternatively, the frame 2 is made of a flexible material. When the length of the frame 2 is forced to change, the frame 2 can be deformed based on its own flexibility.

[0064] There are multiple retractable frames 1, all of which are arranged in parallel, and the heat exchange membranes 10 correspond to the retractable frames 1 one by one, and a heat exchange air duct is formed between two adjacent heat exchange membranes 10. The airflow in two adjacent heat exchange air ducts exchanges heat through the heat exchange membranes 10 between the two heat exchange air ducts. The two adjacent retractable frames 1 are sealed to ensure reliable sealing of the heat exchange air duct.

[0065] The retractable frame 1 is provided with air outlets 11 connected to the corresponding heat exchange air duct, and the air outlets 11 of two adjacent retractable frames 1 are arranged in staggered directions. That is, the airflows entering different positions are respectively made use of air outlets 11 facing different directions (such as one air outlet 11 introducing fresh air, and another air outlet 11 introducing return air), so that the airflows at different positions can be heat exchanged through the corresponding heat exchange membrane 10, and at the same time, the corresponding airflows (such as one airflow is fresh air after heat exchange, and the other airflow is return air after heat exchange) are discharged through air outlets 11 facing different directions, so as to realize heat exchange between fresh air and return air.

[0066] Among all the frame frames 2 on the same retractable frame 1, two of the frame frames 2 are provided with openings, and one of the openings serves as an air inlet of the heat exchange unit, and the other opening serves as an air outlet of the heat exchange unit.

[0067] An axial telescopic mechanism 5 is connected between two adjacent telescopic frames 1, and the axial telescopic mechanism 5 is used to adjust the distance between the two adjacent telescopic frames 1. By adjusting the distance, axial stress is applied to ice or dust blocks on the surface of the heat exchange core, thereby ensuring the deicing and dust removal effect of the heat exchange core.

[0068] The axial telescopic mechanism 5 includes a telescopic seat and a telescopic rod, wherein the telescopic rod is movably arranged on the telescopic seat, and in two adjacent telescopic frames 1, the telescopic seat is arranged on one telescopic frame 1, and the telescopic rod is arranged on the other telescopic frame 1. By adjusting the length of the telescopic rod protruding from the telescopic seat, the purpose of adjusting the distance between the two adjacent telescopic frames 1 is achieved.

[0069] The heat exchange core also includes a rotating mechanism 6, which is drivingly connected to all the telescopic frames 1, and is used to drive all the telescopic frames 1 to rotate. The rotating mechanism 6 can drive all the telescopic frames 1 to rotate, thereby adjusting the direction of the air outlet 11 of the heat exchange core. For example, when the heat exchange core needs to be de-iced, stress de-icing is performed through the deformation of the heat exchange core itself, but there is a problem that although the ice cubes are separated from the heat exchange core, they cannot fall off under the action of gravity. At this time, the heat exchange core is rotated to change the position of the ice cubes and fall off under the action of gravity, thereby achieving the purpose of de-icing. For another example, when the heat exchange core needs to be dusted, stress dust removal is performed through the deformation of the heat exchange core itself. In order to prevent dust blocks or dust from falling into the shell and blocking the air duct of the heat exchange core again or polluting the indoor air, the heat exchange core can be rotated to rotate the surface of the heat exchange core where dust blocks or dust exist to the part connected to the outdoors. The dust blocks or dust on the surface can be blown to the outdoors by driving other structures (such as fans), thereby achieving the purpose of dust removal.

[0070] Specifically, the rotating mechanism 6 includes a driving mechanism and a rotating gear. The driving mechanism is arranged on the mounting plate, and the rotating gear is arranged on the corresponding heat exchange core.

[0071] The heat exchange core further includes an end plate 9 , and the rotating mechanism 6 is disposed on the end plate 9 , and the rotating mechanism 6 can enable the end plate 9 and the telescopic frame 1 to rotate relative to each other.

[0072] A fresh air device comprises the above-mentioned heat exchange core.

[0073] The fresh air device includes a housing 7, an exhaust air duct 71 is formed in the housing 7, the heat exchange core is rotatably arranged in the housing 7, and the heat exchange core can adjust the portion connected to the exhaust air duct 71. The surface of the heat exchange core with dust or dirt is rotated to be connected to the exhaust air duct 71, and the dust or dirt on the surface is blown to the outside by the exhaust fan arranged in the exhaust air duct 71, so as to achieve the purpose of dust removal.

[0074] A fresh air duct is also formed in the shell, and the heat exchange core is arranged at the intersection of the exhaust air duct 71 and the fresh air duct, and a fresh air fan is arranged in the fresh air duct.

[0075] The fresh air device also includes an edge seal 8, which is arranged on the inner surface of the shell 7, and the edge seal 8 can be sealed with the heat exchange core. During the deicing and / or dust removal process of the heat exchange core, the edge seal 8 is separated from the heat exchange core, thereby ensuring that the heat exchange core can be deformed or rotated freely. When the fresh air device is working normally, the edge seal 8 is sealed with the heat exchange core, thereby reliably dividing the interior of the shell 7 into a plurality of chambers connected to the heat exchange core, ensuring that the heat exchange core can reliably exchange heat. Preferably, the edge seal 8 is an air bag.

[0076] The fresh air device also includes an end seal, which is arranged on the inner surface of the shell 7, and the end seal can be sealed with the end of the heat exchange core, and the end seal can be deformed simultaneously with the heat exchange core. When the axial telescopic mechanism 5 in the heat exchange core adjusts the spacing between the telescopic frames 1, the end seal can gradually reduce the size in the axial direction as the spacing increases, thereby ensuring that the end of the heat exchange core is also in a sealed state and ensuring the reliability of the axial deformation of the heat exchange core.

[0077] The fresh air device also includes a water receiving tray, which is arranged below the heat exchange core.

[0078] Another aspect of the present invention provides a fresh air device control method, which is applied to the fresh air device as described above. Specifically, Figure 5 An optional flow chart of the method is shown as follows: Figure 5 As shown, the method includes the following steps S502-S506:

[0079] S502: Detecting operating parameters of the fresh air device;

[0080] S504: judging whether the heat exchange core meets a preset condition according to the operating parameters; wherein the preset condition includes at least one of the following: a preset ice blocking condition and a preset dust blocking condition;

[0081] S506: If yes, control the heat exchange core to perform deicing operation or dust removal operation.

[0082] Specifically, controlling the heat exchange core to perform deicing or dust removal operations includes: controlling the heat exchange core to perform axial rotation; and controlling the heat exchange core to perform radial expansion and / or axial expansion to perform deicing or dust removal.

[0083] The deformable frame is utilized to generate deformation so that the ice and / or dust blocks on the heat exchange core are broken and dropped off under the action of stress, thereby achieving the purpose of de-icing and dust removal of the heat exchange core. The distance between two adjacent deformable frames is changed by the axial telescopic mechanism to further increase the stress on the ice and dust blocks, thereby enhancing the de-icing and dust removal effect.

[0084] The fresh air device also includes an edge seal 8, which is arranged on the inner surface of the shell 7, and the edge seal 8 can be sealed with the heat exchange core. In the process of deicing and / or dust removal of the heat exchange core, such as before controlling the heat exchange core to rotate axially, the edge seal 8 of the heat exchange core is controlled to release the sealing state, that is, the edge seal 8 is separated from the heat exchange core, thereby ensuring that the heat exchange core can deform or rotate freely. When the fresh air device is working normally, such as after controlling the heat exchange core to expand and contract radially and / or axially, the edge seal 8 of the heat exchange core is controlled to restore the sealing state, that is, the edge seal 8 is sealed with the heat exchange core, thereby reliably dividing the interior of the shell 7 into multiple chambers connected to the heat exchange core, ensuring that the heat exchange core can reliably exchange heat.

[0085] In the above embodiment, the operating parameters of the fresh air device include at least: temperature parameters and pressure parameters; the temperature parameters include at least one of the following: fresh air inlet side temperature, fresh air outlet side temperature; the pressure parameters include at least one of the following: return air side pressure difference, fresh air side pressure difference; the dust blockage conditions include: return air side dust blockage conditions and fresh air side dust blockage conditions.

[0086] Among them, the preset ice blocking conditions include: the pressure difference on the return air side is greater than or equal to the first preset pressure difference, the temperature on the fresh air inlet side is less than or equal to the preset temperature, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is less than or equal to the first preset temperature difference; the first preset pressure difference is the preset ice blocking pressure difference, and when this pressure difference is exceeded, it can be determined that there is ice on the return air side. And the fresh air inlet side temperature is less than or equal to the preset temperature, indicating that the outdoor temperature is low and there is a possibility of ice blocking, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is less than or equal to the first preset temperature difference, indicating that the heat exchange effect is poor, and the return air side pressure difference is large, indicating that there is ice on the return air side.

[0087] The dust blockage conditions on the return air side include: the pressure difference on the return air side is greater than or equal to the second preset pressure difference, the second preset pressure difference is the preset dust blockage pressure difference, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is greater than the second preset temperature difference, indicating that there is no icing. Therefore, there is dust blockage on the return air side at this time, that is, the dust blockage condition on the return air side is met.

[0088] The dust blocking condition on the fresh air side includes: the pressure difference on the fresh air side is greater than or equal to the third preset pressure difference, the third preset pressure difference can be equal to the second preset pressure difference, or can be set according to the dust blocking condition on the fresh air side. And the temperature difference between the temperature on the fresh air inlet side and the temperature on the fresh air outlet side is greater than the third preset temperature difference. The third preset temperature difference can be equal to the second preset temperature difference, or can be set according to specific conditions.

[0089] When the heat exchange core meets the preset ice blocking condition, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate clockwise by a first preset angle, so that the heat exchange core rotates toward the side of the return air inlet to the fresh air outlet; controlling the heat exchange core to perform radial expansion and / or axial expansion, including: controlling the expandable frame 1 of the heat exchange core to expand and contract a first preset number of times, and / or controlling the axial expansion mechanism 5 of the heat exchange core to expand and contract a second preset number of times. Figure 4 For example, the heat exchange core is a tetrahedron. Figure 4 It is the initial position, and the four sides face the return air inlet, return air outlet, fresh air inlet and fresh air outlet respectively. When there is ice blockage on the return air side, rotate the side of the heat exchange core facing the return air inlet to face the fresh air outlet, that is, rotate 90 degrees clockwise so that the return air side is located above the water tray. Of course, when the heat exchange core is in other shapes, such as a hexagon, the above-mentioned first preset angle is no longer 90 degrees, and needs to be determined according to the rotation position. Deformation is performed while rotating, and stress is used for deicing and ice crushing. The number of times the retractable frame 1 is retracted and the number of times the axial retractable mechanism 5 is retracted and extended can be determined according to the specific ice blockage situation. When the ice layer is thicker or the ice area is larger, the number of retractions can be increased, and when the ice layer is thinner or the ice area is smaller, the number of retractions can be reduced. After de-icing and ice crushing, the return air outlet and the fresh air inlet are controlled to be closed, the return air inlet and the fresh air outlet are opened, and the edge seal between the return air inlet and the fresh air outlet is released from the sealing state, so that the return air inlet and the fresh air outlet are connected. At this time, it is in the internal circulation mode, and the indoor hot air is used to melt the small ice cubes that fall off, and the core heat exchange film can also be dried. The fresh air fan is started and the component state is reset after the first preset time, and the original operation state of the whole machine is restored. After a period of operation, the detection step S502 is repeated.

[0090] The dust blocking conditions include: dust blocking conditions on the return air side and dust blocking conditions on the fresh air side; when the heat exchange core meets the dust blocking conditions on the return air side, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate counterclockwise by a second preset angle, so that the heat exchange core rotates from the side facing the return air inlet 72 to the side facing the return air outlet 73; controlling the heat exchange core to perform radial expansion and / or axial expansion and contraction, including: controlling the retractable frame 1 of the heat exchange core to expand and contract a third preset number of times, and / or controlling the axial expansion and contraction mechanism 5 of the heat exchange core to expand and contract a fourth preset number of times. The above-mentioned second preset angle is preferably 180 degrees counterclockwise, so that the heat exchange core rotates from the side facing the return air inlet 72 to the side facing the return air outlet 73 to remove dust. The number of expansion and contraction of the retractable frame 1 and the number of expansion and contraction of the axial expansion and contraction mechanism 5 can be determined according to the specific dust blocking situation. When there is more dust, the number of expansion and contraction can be increased, and when there is less dust, the number of expansion and contraction can be reduced.

[0091] When the heat exchange core meets the dust blockage condition on the fresh air side, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate counterclockwise by a third preset angle, so that the heat exchange core rotates from the side facing the fresh air inlet (not shown in the figure) to the side facing the return air outlet 73; the third preset angle is preferably 90 degrees counterclockwise, so that the heat exchange core rotates from the side facing the fresh air inlet to the side facing the return air outlet 73 to remove dust. The heat exchange core is controlled to perform radial expansion and / or axial expansion, including: controlling the retractable frame 1 of the heat exchange core to expand and contract a fifth preset number of times, and / or controlling the axial expansion mechanism 5 of the heat exchange core to expand and contract a sixth preset number of times. Similarly, the number of expansions and contractions of the retractable frame 1 and the number of expansions and contractions of the axial expansion mechanism 5 can be determined according to the specific dust blockage situation. When there is more dust, the expansion and contraction times can be increased, and when there is less dust, the expansion and contraction times can be reduced.

[0092] In addition, in case of dust blockage, after controlling the heat exchange core to perform radial expansion and / or axial expansion, the method further includes: controlling the return air outlet 73 and the return air inlet 72 to open, and controlling the exhaust fan to operate at a preset gear for a second preset time. For example, the exhaust fan is operated at a high gear for 20 minutes, and the strong exhaust can take away the fallen dust and further clean the core channel.

[0093] The present invention also provides another fresh air device control method, specifically, Figure 6 An optional flow chart of the method is shown as follows: Figure 6 As shown, the method includes the following steps S601-S623:

[0094] S601: The unit starts running;

[0095] S602: The return air pressure difference sensor starts to detect Ppi (return air side pressure difference), the fresh air inlet side temperature sensor starts to detect Txi (fresh air inlet side temperature), and the fresh air outlet side temperature sensor starts to detect Txc (fresh air outlet side temperature);

[0096] S603: Determine whether the following conditions are met: Ppi ≥ ice blocking threshold A, Txi ≤ 0°C, △Tx ≤ m; △Tx is the difference between Txi and Txc; if so, proceed to step S608, otherwise, proceed to step S604;

[0097] S604: Determine whether the following conditions are met: Ppi ≥ dust blocking threshold B, △Tx>n; if so, proceed to step S615, otherwise, proceed to step S605;

[0098] S605: The fresh air pressure difference sensor starts to detect Pxi (fresh air side pressure difference);

[0099] S606: Determine whether the following conditions are met: Pxi≥dust blocking threshold B, △Tx>n; if so, proceed to step S622, otherwise, proceed to step S607;

[0100] S607: The unit operates in the original state;

[0101] S608: Start de-icing mode;

[0102] S609: The core sealing airbags are all deflated and contracted, and the core assembly is rotated 90 degrees clockwise; when ice blockage occurs on the return air side, the heat exchange core is rotated toward the side of the return air inlet to the fresh air outlet, that is, rotated 90 degrees clockwise, so that the return air side is located above the water tray;

[0103] S610: The core body two-stage telescopic heat exchange unit body diameter and axial telescopic mechanism are respectively telescoped w and y times to perform deformation stress de-icing and ice crushing processing; deformation is performed while rotating, and stress is used to perform de-icing and ice crushing processing; the number of telescopic frames 1 and the number of telescopic mechanisms 5 can be determined according to the specific ice blockage situation. When the ice layer is thick or the ice area is large, the number of telescopic times can be increased, and when the ice layer is thin or the ice area is small, the number of telescopic times can be reduced;

[0104] S611: the sealing airbag is inflated and sealed, and the exhaust air outlet and the fresh air inlet are closed; after de-icing and ice crushing, the return air outlet and the fresh air inlet are controlled to be closed, and the return air inlet and the fresh air outlet are opened, and the edge seal between the return air inlet and the fresh air outlet is released from the sealing state, so that the return air inlet and the fresh air outlet are connected;

[0105] S612: Start the fresh air fan and run it for f minutes (in the internal circulation mode at this time); in the internal circulation mode at this time, the indoor hot air is used to melt the small ice cubes that fall off, and the core heat exchange film can also be dried;

[0106] S613: component status reset;

[0107] S614: restore the original operating state of the whole machine and keep running for g hours; return to step S602; start the fresh air fan to run for the first preset time, reset the component state, restore the original operating state of the whole machine, keep running for a period of time and then repeat the detection step;

[0108] S615: Start dust removal mode; this is dust removal on the return air side;

[0109] S616: The core sealing airbags are all deflated and contracted, and the core assembly rotates 180° counterclockwise; the heat exchange core rotates from the side facing the return air inlet to the side facing the return air outlet to remove dust;

[0110] S617: The core double-stage telescopic heat exchange unit body diameter and the axial telescopic mechanism are respectively telescoped w1 and y1 times to perform deformation stress dust removal and dust removal processing; the number of telescopic frames 1 and the number of telescopic mechanisms 5 can be determined according to the specific dust blockage situation. When there is a lot of dust, the number of telescopic times can be increased, and when there is less dust, the number of telescopic times can be reduced;

[0111] S618: The airbags are fully inflated and sealed;

[0112] S619: The exhaust air enters high-speed operation for 1 minute; the strong exhaust air can take away the fallen dust and further clean the core channel;

[0113] S620: component status reset;

[0114] S621: restore the original running state of the whole machine and keep running for g1 hour; then return to step S602;

[0115] S622: Start the dust removal mode; at this time, the fresh air side is blocked by dust;

[0116] S623: The core sealing airbags are completely deflated and contracted, and the core assembly is rotated 90° counterclockwise; 90 degrees counterclockwise, the heat exchange core is rotated from the side facing the fresh air inlet to the side facing the return air outlet 73 to remove dust, and the subsequent steps are the same as the dust removal steps on the return air side.

[0117] The above device and control method achieve the purpose of de-icing, de-dusting, ice crushing and dust crushing through the two-way telescopic adjustment of the rotary two-stage telescopic core assembly. Through the rotation adjustment of the assembly, ice cubes and dust groups fall off from the core under the action of gravity. When de-icing, the internal circulation operation of the unit can further melt the ice and discharge it to the outside of the unit in the water receiving tray, and at the same time, it can also dry the core heat exchange membrane. The strong exhaust during dust removal can take away the shed dust and further clean the core channel. Through the above method, the ice blockage and dust blockage problems of the fresh air unit are solved, making the heat exchange efficiency of the heat exchange core higher, cleaner and more energy-saving.

[0118] The present invention also provides a storage medium comprising computer executable instructions, wherein the computer executable instructions are used to execute the above-mentioned fresh air device control method when executed by a computer processor.

[0119] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A heat exchange core, characterized in that: include: Retractable frame (1); A heat exchange membrane (10), wherein the heat exchange membrane (10) is arranged on the retractable frame (1); The retractable frame (1) is capable of being retracted and deformed in the direction of the plane where the heat exchange membrane (10) is located, and the heat exchange membrane (10) is deformed simultaneously with the deformation of the retractable frame (1); The retractable frame (1) comprises a plurality of frames (2), each of the frames (2) constituting a part of the retractable frame (1), and the length of the frames (2) is adjustable; The number of the retractable frames (1) is plural, and all the retractable frames (1) are arranged in parallel. The heat exchange membranes (10) correspond to the retractable frames (1) one by one, and a heat exchange air duct is formed between two adjacent heat exchange membranes (10).

2. The heat exchange core according to claim 1, characterized in that: The heat exchange core further comprises an adjustment structure, the adjustment structure being connected to the frame (2), and the adjustment structure being used to adjust the length of the frame (2).

3. The heat exchange core according to claim 2, characterized in that: The adjustment structure comprises a base (3) and a radial telescopic mechanism (4); the base (3) is located in the middle of the telescopic frame (1); a first end of the radial telescopic mechanism (4) is arranged on the base (3); and a second end of the radial telescopic mechanism (4) is arranged on the frame (2).

4. The heat exchange core according to claim 1, characterized in that: The frame (2) comprises a telescopic sleeve structure; or the frame (2) is made of a flexible material.

5. The heat exchange core according to claim 4, characterized in that: The retractable frame (1) is provided with an air outlet (11) which is in communication with the corresponding heat exchange air duct, and the air outlets (11) of two adjacent retractable frames (1) are arranged in staggered directions.

6. The heat exchange core according to claim 4, characterized in that: An axial telescopic mechanism (5) is connected between two adjacent telescopic frames (1), and the axial telescopic mechanism (5) is used to adjust the distance between the two adjacent telescopic frames (1).

7. The heat exchange core according to claim 6, characterized in that: The axial telescopic mechanism (5) comprises a telescopic seat and a telescopic rod. In two adjacent telescopic frames (1), the telescopic seat is arranged on one telescopic frame (1), and the telescopic rod is arranged on the other telescopic frame (1).

8. The heat exchange core according to claim 5, characterized in that: The heat exchange core further comprises a rotating mechanism (6), wherein the rotating mechanism (6) is drivingly connected to all the telescopic frames (1), and the rotating mechanism (6) is used to drive all the telescopic frames (1) to rotate.

9. A fresh air device, characterized in that: A heat exchange core comprising the heat exchange core according to any one of claims 1 to 8.

10. The fresh air device according to claim 9, characterized in that: The fresh air device comprises a shell (7), an exhaust air duct (71) is formed in the shell (7), the heat exchange core is rotatably arranged in the shell (7), and the heat exchange core can adjust the part communicating with the exhaust air duct (71).

11. The fresh air device according to claim 10, characterized in that: The fresh air device further comprises an edge seal (8), wherein the edge seal (8) is arranged on the inner surface of the shell (7), and the edge seal (8) can be sealed and matched with the heat exchange core.

12. The fresh air device according to claim 10, characterized in that: The fresh air device also includes an end seal, which is arranged on the inner surface of the shell (7), and the end seal can be sealed with the end of the heat exchange core, and the end seal can be deformed simultaneously with the heat exchange core.

13. A method for controlling a fresh air device, applied to the fresh air device according to any one of claims 9 to 12, characterized in that: The method comprises: Detecting operating parameters of the fresh air device; Determining whether the heat exchange core meets a preset condition according to the operating parameters; wherein the preset condition includes at least one of the following: a preset ice blocking condition, a preset dust blocking condition; If yes, controlling the heat exchange core to perform deicing operation or dust removal operation; Controlling the heat exchange core to perform deicing or dust removal operations includes: Controlling the heat exchange core to rotate axially; The heat exchange core is controlled to perform radial expansion and / or axial expansion to perform de-icing or dust removal.

14. The method according to claim 13, characterized in that Before controlling the heat exchange core to rotate axially, the method further includes: controlling the edge seal of the heat exchange core to release the sealing state; After controlling the heat exchange core to perform radial expansion and contraction and axial expansion and contraction, the method further includes: controlling the edge seal of the heat exchange core to restore the sealing state.

15. The method according to claim 13, characterized in that The operating parameters include at least: temperature parameters and pressure parameters; the temperature parameters include at least one of the following: fresh air inlet side temperature, fresh air outlet side temperature; the pressure parameters include at least one of the following: return air side pressure difference, fresh air side pressure difference; the dust blocking conditions include: return air side dust blocking conditions and fresh air side dust blocking conditions; The preset ice blocking condition includes: the return air side pressure difference is greater than or equal to a first preset pressure difference, the fresh air inlet side temperature is less than or equal to a preset temperature, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is less than or equal to a first preset temperature difference; The dust blocking condition on the return air side includes: the pressure difference on the return air side is greater than or equal to the second preset pressure difference, and the temperature difference between the temperature on the fresh air inlet side and the temperature on the fresh air outlet side is greater than the second preset temperature difference; The dust blocking condition on the fresh air side includes: the pressure difference on the fresh air side is greater than or equal to a third preset pressure difference, and the temperature difference between the fresh air inlet side temperature and the fresh air outlet side temperature is greater than the third preset temperature difference.

16. The method according to claim 13, characterized in that When the heat exchange core meets the preset ice blocking condition, Controlling the heat exchange core to perform axial rotation includes: controlling the heat exchange core to rotate clockwise by a first preset angle, so that the heat exchange core rotates from the side facing the return air inlet to the side facing the fresh air outlet; Controlling the heat exchange core to perform radial expansion and / or axial expansion includes: controlling the expandable frame of the heat exchange core to expand and contract a first preset number of times, and / or controlling the axial expansion mechanism of the heat exchange core to expand and contract a second preset number of times.

17. The method according to claim 13, characterized in that The dust blocking conditions include: dust blocking conditions on the return air side and dust blocking conditions on the fresh air side; When the heat exchange core meets the return air side dust blockage condition, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate counterclockwise by a second preset angle, so that the heat exchange core rotates toward the side of the return air inlet to the return air outlet; controlling the heat exchange core to perform radial expansion and / or axial expansion, including: controlling the expansion and contraction of the retractable frame of the heat exchange core a third preset number of times, and / or controlling the expansion and contraction of the axial expansion mechanism of the heat exchange core a fourth preset number of times; When the heat exchange core meets the dust blockage condition on the fresh air side, the heat exchange core is controlled to rotate axially, including: controlling the heat exchange core to rotate counterclockwise to a third preset angle, so that the heat exchange core rotates toward the side of the fresh air inlet to toward the return air outlet; controlling the heat exchange core to radially expand and / or axially expand and / or expand and contract, including: controlling the retractable frame of the heat exchange core to expand and contract a fifth preset number of times, and / or controlling the axial expansion mechanism of the heat exchange core to expand and contract a sixth preset number of times.

18. The method according to claim 16, characterized in that After controlling the heat exchange core to perform radial expansion and axial expansion, the method further includes: The return air outlet and the fresh air inlet are controlled to be closed, the return air inlet and the fresh air outlet are opened, the edge seal between the return air inlet and the fresh air outlet is released from the sealing state, and the fresh air fan is started to run for the first preset time.

19. The method according to claim 17, characterized in that After controlling the heat exchange core to perform radial expansion and axial expansion, the method further includes: The return air outlet and the return air inlet are controlled to open, and the exhaust fan is controlled to run at a preset gear for a second preset time.

20. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to execute the fresh air device control method according to any one of claims 13 to 19 when executed by a computer processor.

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