Heat exchange device, fresh air handling unit and air volume control method

Abstract

The application discloses a heat exchange device, a fresh air unit and an air volume control method. The heat exchange device comprises a shell, the inside of the shell is divided into at least three containing spaces arranged in sequence, and one core body is arranged in each containing space; a vent corresponding to the position of each core body is arranged on the shell, so that fresh air and return air flow through the core body to perform heat exchange, and the opening and closing of the vent can be controlled; an air valve is arranged between adjacent containing spaces, and the number of core bodies participating in heat exchange and the series-parallel connection mode of the core bodies are controlled through the vent and the air valve. The application can realize the purpose of air volume gradient change and air speed diversified adjustment, flexibly and finely control the air volume of the fresh air unit, meet the demand of changing fresh air, and adjust according to actual demand, so that the energy consumption of the unit can be reduced, and the human comfort is improved. Moreover, at least three light core bodies replace the original single core body, so that maintenance is more convenient and replacement is easier.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of unit, in particular to a heat exchange device, a fresh air handling unit and a fresh air volume control method. BACKGROUND

[0002] At present, the air tightness of house construction is very high, and with the increasing of people's living standard and health consciousness, people's demand for clean fresh air is also increasing, and fresh air handling unit is generally used to provide clean fresh air for indoor. The fresh air handling unit includes a full heat exchange core, indoor return air and outdoor fresh air flow through the core in a cross manner to exchange heat.

[0003] The conventional large fresh air handling unit generally has a single core, only one air inlet, that is, fresh air flows into the core through one air inlet. Even if two or more cores are provided, all the cores work in series, and the air volume cannot be adjusted or can only be adjusted by changing the speed of the fan, which is not flexible and not fine enough. Moreover, the single core in the large fresh air handling unit is too large in size and weight, which is not convenient for maintenance and replacement.

[0004] In view of the problem of insufficient flexibility and fineness of air volume adjustment of the fresh air handling unit in the prior art, no effective solution has been proposed so far. SUMMARY

[0005] The embodiments of the present application provide a heat exchange device, a fresh air handling unit and a fresh air volume control method to at least solve the problem of insufficient flexibility and fineness of air volume adjustment of the fresh air handling unit in the prior art.

[0006] To solve the above technical problem, the embodiments of the present application provide a heat exchange device, comprising: a shell, the inside of the shell is divided into at least three accommodation spaces arranged in sequence, and one core is placed in each accommodation space;

[0007] The shell is provided with an air inlet corresponding to the position of each core for the flow of fresh air and return air through the core for heat exchange, and the opening and closing of the air inlet can be controlled.

[0008] A wind valve is arranged between adjacent accommodation spaces, and the number of cores participating in heat exchange and the series-parallel mode of the cores are controlled through the air inlet and the wind valve.

[0009] Optionally, the shell is provided with a first fresh air inlet, a second fresh air inlet, a first return air inlet and a second return air inlet corresponding to the position of each core, the fresh air flows through the core through the first fresh air inlet and the second fresh air inlet, and the return air flows through the core through the first return air inlet and the second return air inlet.

[0010] Optionally, a partition plate is arranged between adjacent accommodation spaces, and a fresh air valve and a return air valve are arranged on each partition plate.

[0011] Optionally, the partitions are divided into a first part, a second part, a third part and a fourth part, the first part and the second part are located at the fresh air side and correspond to different ventilation surfaces of the same core respectively, and the third part and the fourth part are located at the return air side and correspond to different ventilation surfaces of the same core respectively.

[0012] Optionally, the fresh air inlet of the fresh air duct is taken as the starting point, the fresh air damper of the first partition is arranged at least in the part of the first partition corresponding to the fresh air outlet surface of the first core, the return air damper of the first partition is arranged at least in the part of the first partition corresponding to the return air inlet surface of the first core, the fresh air damper of the last partition is arranged at least in the part of the last partition corresponding to the fresh air inlet surface of the last core, the return air damper of the last partition is arranged at least in the part of the last partition corresponding to the return air outlet surface of the last core, and each part of the remaining partitions is provided with a damper.

[0013] Optionally, the volumes of the cores are the same and the sizes of the air outlets are the same.

[0014] Optionally, along the fresh air flow direction in the fresh air duct, the volumes of the cores gradually decrease, and / or the air outlets corresponding to the cores gradually decrease.

[0015] Optionally, the air outlets corresponding to the cores are sequentially and proportionally reduced.

[0016] The embodiment of the present application further provides a fresh air handling unit, which comprises the heat exchange device.

[0017] The embodiment of the present application further provides an air volume control method, which is applied to the fresh air handling unit and comprises the following steps.

[0018] Monitoring an air volume parameter of a region regulated by the fresh air handling unit;

[0019] Controlling the air outlets and the dampers in the heat exchange device according to the air volume parameter, so as to adjust the number of cores participating in heat exchange and the series-parallel connection mode of the cores.

[0020] Optionally, before the step of monitoring the air volume parameter of the region regulated by the fresh air handling unit, the method further comprises the following steps: in response to a start-up instruction, opening the air outlets corresponding to a preset number of cores and controlling the preset number of cores to work in a parallel mode.

[0021] Optionally, the step of controlling the air outlets and the dampers in the heat exchange device according to the air volume parameter, so as to adjust the number of cores participating in heat exchange and the series-parallel connection mode of the cores, comprises the following steps.

[0022] If the current air volume parameter indicates that the air volume needs to be increased, the air inlets corresponding to n core bodies are opened, and the n core bodies are controlled to work in parallel mode, and after a preset time, if the current air volume parameter still indicates that the air volume needs to be increased, n core bodies are opened again, and the cycle is repeated until all core bodies participate in heat exchange and work in parallel mode or until the current air volume parameter indicates that the air volume does not need to be increased, 1≤n≤N, N represents the total number of core bodies;

[0023] If the current air volume parameter indicates that the air volume needs to be reduced, one core body is reduced from the core bodies currently participating in heat exchange, and the air inlet corresponding to the core body is closed, and after a preset time, if the current air volume parameter still indicates that the air volume needs to be reduced, one core body is reduced again, and the cycle is repeated until the number of core bodies currently participating in heat exchange is 1 or the current air volume parameter indicates that the air volume does not need to be reduced.

[0024] If the current air volume parameter indicates that the air volume does not need to be increased or reduced, the current operating state is maintained, and the step of monitoring the air volume parameter of the area regulated by the fresh air unit is returned to be executed.

[0025] Optionally, in the case where the number of core bodies currently participating in heat exchange is 1, if the current air volume parameter still indicates that the air volume needs to be reduced, two core bodies located behind the core body in the fresh air inlet direction are controlled to participate in heat exchange, and the three core bodies are controlled to work in series mode.

[0026] Optionally, after the two core bodies located behind the core body in the fresh air inlet direction are controlled to participate in heat exchange, and the three core bodies are controlled to work in series mode, the method further comprises: if the current air volume parameter indicates that the air volume needs to be increased, the series connection of the three core bodies is cancelled, and the working state of one core body is restored, and the step of monitoring the air volume parameter of the area regulated by the fresh air unit is returned to be executed.

[0027] Optionally, after one core body is reduced from the core bodies currently participating in heat exchange, and the air inlet corresponding to the core body is closed, the method further comprises:

[0028] If the current air volume parameter indicates that the air volume needs to be increased, the air inlet corresponding to the core body that was reduced most recently is re-opened, and the core body is controlled to work in parallel mode.

[0029] After that, if the current air volume parameter indicates that the air volume needs to be reduced, the last three core bodies in the core bodies currently participating in heat exchange and working in parallel mode are connected in series along the fresh air inlet direction to form a core body group, and the core body group is controlled to be connected in parallel with other core bodies participating in heat exchange.

[0030] Optionally, after the last three of the cores currently participating in heat exchange and operating in parallel mode are connected in series along the direction of incoming fresh air to form a core group and the core group is controlled to be in parallel with other cores participating in heat exchange, the method further comprises: if the current air volume parameter indicates that the air volume needs to be increased, the series connection of the core group is cancelled, the cores currently participating in heat exchange are returned to the parallel mode, and the step of monitoring the air volume parameter of the area regulated by the fresh air handling unit is performed again.

[0031] Optionally, after the n cores are opened and controlled to operate in parallel mode, the method further comprises:

[0032] If the current air volume parameter indicates that the air volume needs to be reduced, the air port corresponding to the core that was opened last time is closed.

[0033] Then, if the current air volume parameter indicates that the air volume needs to be increased, the last three of the cores currently participating in heat exchange and operating in parallel mode are connected in series along the direction of incoming fresh air to form a core group, and the core group is controlled to be in parallel with other cores participating in heat exchange.

[0034] Optionally, after the last three of the cores currently participating in heat exchange and operating in parallel mode are connected in series along the direction of incoming fresh air to form a core group and the core group is controlled to be in parallel with other cores participating in heat exchange, the method further comprises: if the current air volume parameter indicates that the air volume needs to be reduced, the series connection of the core group is cancelled, the cores currently participating in heat exchange are returned to the parallel mode, and the step of monitoring the air volume parameter of the area regulated by the fresh air handling unit is performed again.

[0035] Optionally, connecting the last three of the cores currently participating in heat exchange in series along the direction of incoming fresh air comprises: if the number of cores currently participating in heat exchange and operating in parallel mode is less than 3, the current operating state is maintained, and the step of monitoring the air volume parameter of the area regulated by the fresh air handling unit is performed again.

[0036] Optionally, the air volume parameter comprises: oxygen concentration, carbon dioxide concentration, or air volume.

[0037] For oxygen concentration, if the current oxygen concentration is less than a first preset threshold, it indicates that the air volume needs to be increased; if the current oxygen concentration is greater than or equal to the first preset threshold and less than or equal to a second preset threshold, and the difference between the second preset threshold and the current oxygen concentration is less than or equal to a preset difference, it indicates that the air volume needs to be reduced; if the current oxygen concentration is greater than or equal to the first preset threshold and less than or equal to the second preset threshold, and the difference between the second preset threshold and the current oxygen concentration is greater than the preset difference, it indicates that the air volume does not need to be increased or reduced.

[0038] For the carbon dioxide concentration, if the current carbon dioxide concentration is greater than a third preset threshold, it indicates that the air volume needs to be increased; if the current carbon dioxide concentration is less than a fourth preset threshold, it indicates that the air volume needs to be decreased; if the current carbon dioxide concentration is greater than or equal to the fourth preset threshold and less than or equal to the third preset threshold, it indicates that the air volume does not need to be increased or decreased.

[0039] For the air volume, if the current air volume is less than the required air volume, it indicates that the air volume needs to be increased; if the current air volume is greater than the required air volume, it indicates that the air volume needs to be decreased; if the current air volume is equal to the required air volume, it indicates that the air volume does not need to be increased or decreased.

[0040] Optionally, for the series of cores, the fresh air damper and the return air damper on the partition plate between the series of cores are opened, and the air outlet corresponding to the first and last cores in the series is opened; if the core is in the parallel mode, the air outlet corresponding to the core is opened, and the fresh air damper and the return air damper on the partition plate of the containing space where the core is located are all closed.

[0041] The embodiment of the present application further provides a computer device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the method provided by the embodiment of the present application when executing the computer program.

[0042] The embodiment of the present application further provides a non-volatile computer readable storage medium, which stores a computer program, and the computer program is characterized in that the steps of the method provided by the embodiment of the present application are implemented when the computer program is executed by a processor.

[0043] The technical scheme of the present application divides the containing space inside the shell to arrange at least three cores in sequence, each core corresponds to an air outlet, and a damper is arranged between adjacent containing spaces, the number of cores participating in heat exchange and the series-parallel mode thereof can be adjusted according to actual conditions through the air outlet and the damper, the purpose of air volume gradient change and air speed diversification adjustment is achieved, the air volume of the fresh air handling unit is flexibly and finely controlled, the demand for changing fresh air is met, the unit energy consumption is reduced and the human comfort is improved by adjusting according to actual demand. The problem of insufficient fine and flexible air volume adjustment of the fresh air handling unit in the prior art is solved. Moreover, at least three light-weight cores replace the original single core, which is more convenient for maintenance and replacement. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is a schematic diagram of a heat exchange device provided by the first embodiment of the present application;

[0045] Figure 2 is a schematic diagram of a V-shaped progressive fresh air handling unit provided by the first embodiment of the present application;

[0046] Figure 3is a side view of a V-shaped progressive core structure provided by the embodiment one of the present application;

[0047] Figure 4A and Figure 4B is a schematic view of an equal change tuyere provided by the embodiment one of the present application;

[0048] Figure 5 is a flow chart of the air volume control method provided by the embodiment two of the present application;

[0049] Figure 6 is a flow chart of the variable tuyere and V-shaped progressive core coupling control provided by the embodiment three of the present application Figure 1 ;

[0050] Figure 7 is a flow chart of the variable tuyere and V-shaped progressive core coupling control provided by the embodiment three of the present application Figure 2 ;

[0051] Figure 8 is a flow chart of the variable tuyere and V-shaped progressive core coupling control provided by the embodiment three of the present application Figure 3 . DETAILED DESCRIPTION

[0052] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the present application in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0053] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0054] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0055] It should be understood that the term "and / or" used herein is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0056] The optional embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0057] Embodiment one

[0058] The present embodiment provides a heat exchange device, as shown in the figure, the heat exchange device comprises: a shell 100, the inside of the shell 100 is divided into at least three containing spaces arranged in sequence, and one core body 200 is placed in each containing space. The shell 100 is provided with an air port 300 corresponding to the position of each core body 200, so that fresh air and return air flow through the core body 200 for heat exchange, and the opening and closing of the air port 300 can be controlled. Adjacent containing spaces are provided with air valves 400 (only one air valve 400 is shown as a reference), and the number of core bodies participating in heat exchange and the series-parallel mode of the core bodies are controlled through the air port 300 and the air valve 400. The more the number of core bodies in the heat exchange device is set, the more precise the air volume control is. Figure 1 Figure 1

[0059] The present embodiment divides the containing space inside the shell to arrange at least three core bodies in sequence, each core body corresponds to an air port, and an air valve is arranged between adjacent containing spaces, and the number of core bodies participating in heat exchange and the series-parallel mode thereof can be adjusted according to actual conditions through the air port and the air valve, so as to realize the purpose of air volume step change and air speed diversification adjustment, and then flexibly and precisely control the air volume of the fresh air unit, meet the demand of changing fresh air, and adjust according to actual demand, so as to reduce the energy consumption of the unit and improve the human comfort. The problem of not precise and flexible air volume adjustment of the fresh air unit in the prior art is solved. Moreover, at least three light core bodies replace the original single core body, which is more convenient for maintenance and easy to replace.

[0060] The series connection mode of the core body means that the air flow enters from one air port, flows through all the series connected core bodies in sequence, and then flows out from one air port. The parallel connection mode of the core body means that the air flow flows into from two or more air ports, flows through different core bodies, and then flows out.

[0061] By opening the number of core bodies through the air port and the air valve according to the actual situation and adopting series connection mode, parallel connection mode or series-parallel mode coexistence, the present application is more flexible than the existing conventional large fresh air unit.

[0062] ​​The shape of the core body 200 can be quadrilateral, hexagonal, rhombic, etc. The embodiment is not limited to the shape of the core body, as long as the heat exchange of fresh air and return air can be achieved.

[0063] The first fresh air outlet, the second fresh air outlet, the first return air outlet and the second return air outlet are arranged on the shell 100 corresponding to each core body 200. Fresh air flows through the core body through the first fresh air outlet and the second fresh air outlet, and return air flows through the core body through the first return air outlet and the second return air outlet. Through the above outlet arrangement, when the core body corresponding outlet is opened, the core body starts to work, which can ensure that fresh air and return air flow through the core body for heat exchange.

[0064] The adjacent accommodating spaces are provided with a partition plate 500, and each partition plate 500 is provided with a fresh air damper and a return air damper. The fresh air damper is located on the fresh air side, and the return air damper is located on the return air side.

[0065] The partition plate 500 is divided into a first part, a second part, a third part and a fourth part. The first part and the second part are located on the fresh air side and correspond to different ventilation surfaces of the same core body, respectively. The third part and the fourth part are located on the return air side and correspond to different ventilation surfaces of the same core body, respectively. Taking the fresh air inlet of the fresh air duct as the starting point, the fresh air damper of the first partition plate 500 is arranged at least in the part of the first partition plate 500 corresponding to the fresh air outlet surface of the first core body, the return air damper of the first partition plate 500 is arranged at least in the part of the first partition plate 500 corresponding to the return air inlet surface of the first core body, the fresh air damper of the last partition plate 500 is arranged at least in the part of the last partition plate 500 corresponding to the fresh air inlet surface of the last core body, and the return air damper of the last partition plate 500 is arranged at least in the part of the last partition plate 500 corresponding to the return air outlet surface of the last core body. Each part of the remaining partition plate 500 is provided with a damper.

[0066] If the dampers between adjacent core bodies are opened and matched with the outlet control, air can flow through the adjacent core bodies in sequence to realize the series connection of the core bodies. For example, four core bodies are connected in series, the fresh air dampers and the return air dampers on the partition plates between the core bodies are opened, and the outlets corresponding to the first core body and the last core body are opened.

[0067] If the core bodies are connected in parallel, the dampers between the core bodies need to be closed. For example, two core bodies are connected in parallel, the outlets corresponding to the two core bodies are opened, and the fresh air dampers and the return air dampers on the partition plates between the two core bodies are closed.

[0068] It should be noted that the first partition 500 and the last partition 500 can also be provided with a wind valve in each part, for example, the first partition 500 is provided with 4 wind valves, but considering that the first partition 500 is close to the fresh air inlet and the return air outlet of the unit, the return air valve on the partition corresponding to the fresh air outlet surface of the first core and the fresh air valve on the partition corresponding to the return air inlet surface of the first core are always closed, when it is necessary to increase the core in the heat exchange device, the two normally closed valves can be enabled.

[0069] In one embodiment, the volume of each core 200 is the same and the size of each air port is the same.

[0070] In another embodiment, the volume of each core 200 gradually decreases along the direction of fresh air flow in the fresh air duct, and / or the air port corresponding to each core 200 gradually decreases.

[0071] The volume of each core gradually decreases, and from the side, all the cores as a whole present a V shape. This V-shaped progressive core group design, combined with the air port matching the change of the core, can avoid large changes in air volume during air volume adjustment, making the fine adjustment of air volume better.

[0072] Preferably, the air ports corresponding to each core gradually decrease in size in proportion, thereby ensuring that the air volume changes equally, which is more conducive to fine adjustment of the air volume.

[0073] The embodiment also provides a fresh air unit, comprising the heat exchange device.

[0074] Reference Figures 2 to 4B Taking five cores as an example, which are respectively referred to as core 201, core 202, core 203, core 204 and core 205, the fresh air unit comprises a fresh air inlet A1, a fresh air outlet A2, a return air inlet B1 and a return air outlet B2. Under the drive of the fresh air fan, outdoor fresh air enters the unit from the fresh air inlet A1, flows through the heat exchange device to exchange heat with return air, and then flows out of the unit from the fresh air outlet A2, and this flow path is the fresh air side. Under the drive of the return air fan, indoor return air enters the unit from the return air inlet B1, flows through the heat exchange device to exchange heat with fresh air, and then flows out of the unit from the return air outlet B2, and this flow path is the return air side.

[0075] In the fresh air unit, in order to ensure the flow of fresh air, a certain space will be left around the heat exchange device on the fresh air side as a first air duct and a second air duct, which enable fresh air to enter and flow out of the heat exchange device through the corresponding air ports. Similarly, in order to ensure the flow of return air, a certain space will be left around the heat exchange device on the return air side as a third air duct and a fourth air duct, which enable return air to enter and flow out of the heat exchange device through the corresponding air ports.Figure 2 and Figure 3 As shown in the figure, there is an upper air duct 601 (corresponding to the first air duct of the fresh air side and the third air duct of the return air side) above the heat exchange device, and there is a lower air duct 602 (corresponding to the second air duct of the fresh air side and the fourth air duct of the return air side) below the heat exchange device. For example, fresh air enters the upper air duct 601, then enters the heat exchange device through the air port, flows through the core, then flows into the lower air duct 602 through the air port, and finally flows out of the unit from the fresh air outlet A2; the return air enters the upper air duct 601, then enters the heat exchange device through the air port, flows through the core, then flows into the lower air duct 602 through the air port, and finally flows out of the unit from the return air outlet B2. It can be understood that the upper air duct and the lower air duct are only for the position shown in the figure, which does not limit the scheme of the present application. For example, if the return air side of the fresh air unit is below the fresh air side, the above-mentioned air ducts can be referred to as left air duct and right air duct.

[0076] As shown in the figure, Figure 4A and Figure 4B The core 201 corresponds to the air port 301, the air port 320, the air port 310 and the air port 311, wherein the air port 301 and the air port 320 are fresh air ports, and the air port 310 and the air port 311 are return air ports. The core 202 corresponds to the air port 302, the air port 319, the air port 309 and the air port 312, wherein the air port 302 and the air port 319 are fresh air ports, and the air port 309 and the air port 312 are return air ports. The core 203 corresponds to the air port 303, the air port 318, the air port 308 and the air port 313, wherein the air port 303 and the air port 318 are fresh air ports, and the air port 308 and the air port 313 are return air ports. The core 204 corresponds to the air port 304, the air port 317, the air port 307 and the air port 314, wherein the air port 304 and the air port 317 are fresh air ports, and the air port 307 and the air port 314 are return air ports. The core 205 corresponds to the air port 305, the air port 316, the air port 306 and the air port 315, wherein the air port 305 and the air port 316 are fresh air ports, and the air port 306 and the air port 315 are return air ports.

[0077] As shown in the figure, Figure 3 The five cores correspond to five accommodation spaces, and there are four partitions. According to the direction of the core 201 to the core 205, the partitions are respectively marked as the partition 501 to the partition 504. Taking the fresh air side as an example (i.e. the air valves 401 to 406 below are fresh air valves), the lower part of the partition 501 is provided with the air valve 401, the upper part and the lower part of the partition 502 are respectively provided with the air valve 402 and the air valve 403, the upper part and the lower part of the partition 503 are respectively provided with the air valve 404 and the air valve 405, and the upper part of the partition 504 is provided with the air valve 406.

[0078] The core body 201, the core body 202 and the core body 203 are connected in series, the air outlets 301, the air outlet 308, the air outlet 311 and the air outlet 318 are opened, the remaining air outlets are closed, the air valves 401 and the air valve 402 are opened, the air valve 403, the air valve 404, the air valve 405 and the air valve 406 are closed, the new air flows in the following direction: the air outlet 301 -> the core body 201 -> the air valve 401 -> the core body 202 -> the air valve 402 -> the core body 203 -> the air outlet 318, and the return air flows in the following direction: the air outlet 308 -> the core body 203 -> the core body 202 -> the core body 201 -> the air outlet 311, the air valve control on the return air side is similar to that on the new air side, which is not shown here, as long as the return air can flow through the core body 203, the core body 202 and the core body 201 in turn. In the series mode, the new air flow only flows through the air outlet 301 and then flows through the core body 201, the core body 202 and the core body 203, the air inlet is less, and the air flow needs to flow through multiple core bodies, so the air resistance is large, and the air volume of the core body 201, the core body 202 and the core body 203 connected in series is lower than that of the core body 201 operating alone.

[0079] For example, the core body 201 and the core body 202 are connected in parallel, all the air valves are closed, only the air outlets 301, the air outlet 302, the air outlet 309, the air outlet 310, the air outlet 311, the air outlet 312, the air outlet 319 and the air outlet 320 are opened, the new air enters the core body 201 from the air outlet 301 and enters the core body 202 from the air outlet 302, and then flows out from the air outlet 319 and the air outlet 320 after heat exchange.

[0080] In the series mode, the air resistance is large, the flow rate is slow, the heat exchange is relatively sufficient, and the heat exchange efficiency is high. If all the core bodies are connected in parallel, the air resistance is small, the flow rate is fast, and the heat exchange efficiency is lower than that in the series mode. In actual application, the core bodies in the heat exchange device can be controlled to be connected in series and in parallel at the same time to achieve the most precise control, for example, the core body 202, the core body 203 and the core body 204 are connected in series and connected in parallel with the core body 201.

[0081] The V-type progressive core body group is matched with the equal-variation air outlet group to realize regular variation of the new air at each air outlet, achieve the purpose of equal-variation air volume and diversified regulation of air speed, and the more the number of core bodies in the heat exchange device, the more precise the air volume control. The V-type progressive core body group matched with the equal-variation air outlet group can realize switching between series and parallel connection modes and switching control of the equal-variation air outlet while realizing total heat exchange, and can realize precise and flexible regulation of the air volume according to actual needs.

[0082] Embodiment two

[0083] The embodiment provides an air volume control method, which is applied to the fresh air handling unit in the above embodiment.

[0084] Figure 5 is a flow chart of the air volume control method provided by Embodiment Two of the present application, as shown in the figure, the method comprises the following steps: Figure 5

[0085] S501, monitoring an air volume parameter of a region regulated by a fresh air handling unit.

[0086] S502, controlling air ports and air valves in a heat exchange device according to the air volume parameter to adjust the number of cores participating in heat exchange and the series-parallel mode of the cores.

[0087] The air volume parameter is a parameter capable of reflecting the size of air volume, for example, oxygen concentration, carbon dioxide concentration or air volume (specifically, fresh air volume at the outlet of the unit). According to the air volume parameter, it can be known whether the air volume is in surplus or deficit, and it can be determined whether the air volume needs to be increased or decreased.

[0088] According to the air volume parameter, the number of cores participating in heat exchange and the series-parallel mode of the cores are adjusted by the air ports and air valves in this embodiment, so as to achieve the purpose of air volume gradient change and air speed diversification adjustment, and then the air volume of the fresh air handling unit is flexibly and finely controlled to meet the demand for changing fresh air, and the unit energy consumption can be reduced and the human comfort can be improved by adjusting according to the actual demand. The problem of insufficient fine and flexible air volume adjustment of the fresh air handling unit in the prior art is solved.

[0089] The air volume parameter includes oxygen concentration, carbon dioxide concentration or air volume.

[0090] For the oxygen concentration, if the current oxygen concentration is less than a first preset threshold, it indicates that the air volume needs to be increased; if the current oxygen concentration is greater than or equal to the first preset threshold and less than or equal to a second preset threshold, and the difference between the second preset threshold and the current oxygen concentration is less than or equal to a preset difference, it indicates that the air volume needs to be decreased; if the current oxygen concentration is greater than or equal to the first preset threshold and less than or equal to the second preset threshold, and the difference between the second preset threshold and the current oxygen concentration is greater than the preset difference, it indicates that the air volume does not need to be increased or decreased.

[0091] For the carbon dioxide concentration, if the current carbon dioxide concentration is greater than a third preset threshold, it indicates that the air volume needs to be increased; if the current carbon dioxide concentration is less than a fourth preset threshold, it indicates that the air volume needs to be decreased; if the current carbon dioxide concentration is greater than or equal to the fourth preset threshold and less than or equal to the third preset threshold, it indicates that the air volume does not need to be increased or decreased.

[0092] For the air volume, if the current air volume is less than the required air volume, it indicates that the air volume needs to be increased; if the current air volume is greater than the required air volume, it indicates that the air volume needs to be decreased; if the current air volume is equal to the required air volume, it indicates that the air volume does not need to be increased or decreased. The required air volume can be a specific value or a value range.

[0093] ​The first preset threshold and the second preset threshold constitute an oxygen concentration comfort interval [first preset threshold, second preset threshold], for example, [19.5%, 23.5%]. The preset difference is the minimum difference allowed, which can be set according to actual conditions. The preset difference is generally small, for example, the value is 0.5. When the oxygen concentration is greater than or equal to the first preset threshold and less than or equal to the second preset threshold, and the difference between the second preset threshold and the oxygen concentration is less than or equal to the preset difference, it indicates that the oxygen concentration is within the comfort interval but is a little high, and at this time the air volume needs to be appropriately reduced to avoid unnecessary energy consumption. It should be noted that the indoor oxygen concentration will not exceed the oxygen concentration of outdoor fresh air.

[0094] The third preset threshold and the fourth preset threshold constitute an allowed interval of carbon dioxide concentration [fourth preset threshold, third preset threshold], for example, [0.03%, 1%]. When the carbon dioxide concentration is greater than the third preset threshold, it indicates that the carbon dioxide concentration is too high, the indoor air quality is not good, and the air volume needs to be increased to quickly introduce outdoor fresh air into the indoor to improve the air quality. When the carbon dioxide concentration is less than the fourth preset threshold, it indicates that the carbon dioxide concentration is too low, and the air volume needs to be appropriately reduced to avoid too low carbon dioxide concentration and unnecessary energy consumption.

[0095] The present embodiment provides three parameters as the basis for controlling the air volume, and the control mode is flexible and reliable.

[0096] In one embodiment, before monitoring the air volume parameter of the area regulated by the fresh air handling unit, it further includes: in response to the start-up instruction, opening the air outlets corresponding to the preset number of cores, and controlling the preset number of cores to work in parallel mode. The preset number can be determined according to the actual number of cores, for example, the preset number is kN, N represents the total number of cores, and k is a coefficient, k≤1. Preferably, k≥1 / 2, half of the cores are started when starting, which can be applied to more scenes, and the number of cores can be conveniently increased or reduced according to actual conditions, and the control is more flexible. The preset number can also be set to a default value, for example, set to 2. The heat exchange device includes at least three cores, which can be started in sequence along the direction of fresh air inlet as needed. The present embodiment can quickly adjust the air in the area when starting.

[0097] In one embodiment, the air outlets and air valves in the heat exchange device are controlled according to the air volume parameter to adjust the number of cores participating in heat exchange and the series-parallel mode of the cores, including:

[0098] If the current air volume parameter indicates that the air volume needs to be increased, the air outlets corresponding to n core bodies are opened, and the n core bodies are controlled to operate in parallel mode. After a preset time, if the current air volume parameter still indicates that the air volume needs to be increased, n core bodies are opened again, and the cycle is repeated until all core bodies participate in heat exchange and operate in parallel mode or until the current air volume parameter indicates that the air volume does not need to be increased, 1≤n≤N, N represents the total number of core bodies.

[0099] If the current air volume parameter indicates that the air volume needs to be reduced, one core body is reduced from the core bodies currently participating in heat exchange, and the air outlet corresponding to the core body is closed. After a preset time, if the current air volume parameter still indicates that the air volume needs to be reduced, one core body is reduced again, and the cycle is repeated until the number of core bodies currently participating in heat exchange is 1 or the current air volume parameter indicates that the air volume does not need to be reduced.

[0100] If the current air volume parameter indicates that the air volume does not need to be increased or reduced, the current operating state is maintained, and the step of monitoring the air volume parameter of the area regulated by the fresh air unit is returned to.

[0101] The embodiment can timely increase or reduce the number of core bodies participating in heat exchange based on the air volume parameter, and timely increase or reduce the air volume to meet the demand and realize fine and flexible adjustment of the air volume.

[0102] In the embodiment, the core bodies can be increased or reduced in a certain order, for example, along the fresh air inlet direction, the core body closest to the fresh air inlet is opened first, and the core body farthest from the fresh air inlet is reduced first. Preferably, the core body with the smallest volume is preferentially reduced to achieve more fine adjustment. After adjusting the core body each time, the unit is operated for a preset time according to the latest adjusted core body, and then the judgment is performed again.

[0103] In the case where the number of core bodies currently participating in heat exchange is 1, if the current air volume parameter still indicates that the air volume needs to be reduced, the two core bodies located behind the core body along the fresh air inlet direction are controlled to participate in heat exchange, and the three core bodies are controlled to operate in series mode. In the embodiment, at least three core bodies are required in series mode, and reference is made to Figure 2 The fresh air outlet A2 is located at the lower part, so the fresh air must flow out of the unit from the lower air duct 602, and the fresh air enters the unit from the upper air duct 601. In order to ensure the smooth flow of fresh air, at least three core bodies are required in series mode. The air volume of three core bodies in series is less than the air volume of a single core body operating independently, so in the case where the number of core bodies currently participating in heat exchange is 1 and the air volume still needs to be reduced, three core bodies in series can be switched to. If all core bodies participate in heat exchange and operate in parallel mode, the air volume is maximum.

[0104] Further, after the two cores behind the core in the fresh air inlet direction are controlled to participate in heat exchange and the three cores are controlled to work in series mode, the method further comprises: if the current air volume parameter indicates that the air volume needs to be increased, the series of the three cores is cancelled, the working mode is returned to one core, and the step of monitoring the air volume parameter of the area regulated by the fresh air handling unit is executed again. Thus, the air volume is finely and flexibly adjusted through a dynamic process to meet the demand.

[0105] In one embodiment, after one core is reduced from the cores currently participating in heat exchange and the air port corresponding to the core is closed, the method further comprises: if the current air volume parameter indicates that the air volume needs to be increased, the air port corresponding to the core that is reduced last time is opened again, and the core is controlled to work in parallel mode. Thus, the air volume can be timely and finely adjusted.

[0106] Further, after the air port corresponding to the core that is reduced last time is opened again and the core is controlled to work in parallel mode, the method further comprises: if the current air volume parameter indicates that the air volume needs to be reduced, the three cores behind the cores currently participating in heat exchange and working in parallel mode are connected in series along the fresh air inlet direction to form a core group, and the core group is controlled to be in parallel with other cores participating in heat exchange. This case indicates that the air volume is too small after one core is reduced, and the air volume is too large if the core is kept. In this case, the series and parallel combination mode is adopted to adjust the air volume, so that the air volume is more flexibly and finely controlled. If the number of the cores currently participating in heat exchange and working in parallel mode is less than 3, the current working state is kept, and the step of monitoring the air volume parameter of the area regulated by the fresh air handling unit is executed again.

[0107] Further, under the premise of reducing the cores, after the three cores behind the cores currently participating in heat exchange and working in parallel mode are connected in series along the fresh air inlet direction to form a core group, and the core group is controlled to be in parallel with other cores participating in heat exchange, the method further comprises: if the current air volume parameter indicates that the air volume needs to be increased, the series of the core group is cancelled, the cores currently participating in heat exchange are returned to parallel mode, and the step of monitoring the air volume parameter of the area regulated by the fresh air handling unit is executed again. Thus, the air volume can be timely and finely adjusted.

[0108] In one embodiment, after the air ports corresponding to the n cores are opened and the n cores are controlled to work in parallel mode, the method further comprises: if the current air volume parameter indicates that the air volume needs to be reduced, the air port corresponding to the core that is increased last time is closed. Thus, the air volume can be timely and finely adjusted.

[0109] Further, after closing the air port corresponding to the core body which is last added, if the current air volume parameter indicates that the air volume needs to be increased, the last three core bodies among the core bodies participating in heat exchange and in parallel mode are connected in series along the fresh air inlet direction to form a core body group, and the core body group is controlled to be in parallel with other core bodies participating in heat exchange. This case indicates that after the core body is added, the air volume is too large, and if the core body is removed, the air volume is too small. At this time, the mode of combination of series and parallel is adopted to adjust the air volume, and more flexible and fine control of the air volume is realized. If the number of core bodies participating in heat exchange and in parallel mode is less than 3, the current operating state is maintained, and the step of monitoring the air volume parameter of the area regulated by the fresh air unit is returned to be executed.

[0110] Further, under the above precondition of adding core bodies, after the last three core bodies among the core bodies participating in heat exchange and in parallel mode are connected in series along the fresh air inlet direction to form a core body group, and the core body group is controlled to be in parallel with other core bodies participating in heat exchange, if the current air volume parameter indicates that the air volume needs to be reduced, the series connection of the core body group is cancelled, the core bodies participating in heat exchange are restored to the parallel mode, and the step of monitoring the air volume parameter of the area regulated by the fresh air unit is returned to be executed. Thus, timely and fine adjustment of the air volume can be realized.

[0111] For the core bodies in series, the fresh air damper and the return air damper on the partition plate between the core bodies in series are opened, and the air ports corresponding to the first and last core bodies in series are opened. If the core bodies are in parallel mode, the air port corresponding to the core body is opened, and the fresh air damper and the return air damper on the partition plate of the space accommodating the core body are all closed. Through the control principle of the air ports and the dampers, the switching control of the series and parallel modes of the core bodies can be realized.

[0112] By coupling control according to actual needs through equal variation air ports and V-shaped progressive core body structure, the air speed, unit static pressure and air resistance are adjusted, flexible and fine control of the air volume of the unit is realized, the demand for fresh air supply is accurately controlled, and the energy consumption of the unit is reduced according to actual needs. The air ports and the core bodies can be flexibly matched according to engineering needs. The more the number of V-shaped progressive core bodies is, the more obvious the effect is.

[0113] Embodiment three

[0114] On the basis of the fresh air unit shown in Figures 2 to 4B , a specific embodiment is combined to describe the above air volume control method. However, it should be noted that the specific embodiment is only used to better illustrate the present application and does not constitute an improper limitation on the present application. The same or corresponding term explanations as in the above embodiment are not described herein.

[0115] As shown in Figure 6 , taking monitoring of indoor oxygen concentration as an example, the air volume control includes the following steps:

[0116] S601, the fresh air handling unit is started, and the first s cores are started to run in parallel, and an oxygen concentration sensor is started. s=N*0.5, N represents the total number of cores, and if the total number of cores is odd, s takes the minimum integer greater than N*0.5. The "front" in the "first s cores" is in the direction of the fresh air flow, that is, the fresh air inlet is "front", and the fresh air outlet is "back".

[0117] S602, the oxygen concentration is monitored by the oxygen concentration sensor. Specifically, at least two oxygen concentration sensors can be arranged in the room, and the average value λ of the readings of all oxygen concentration sensors is taken.

[0118] S603, whether the real-time λ is in the comfort concentration interval [λ1, λ2] is judged, if yes, S616 is entered, if not, S604 is entered. λ1 represents the first preset threshold, and λ2 represents the second preset threshold.

[0119] S604, all cores are started to run in parallel for t minutes, and the current oxygen concentration λx is obtained.

[0120] S605, whether λ1≤λx≤λ2 and λ2-λx>c are satisfied, if yes, S616 is entered, if not, S606 is entered. Wherein, c represents the minimum allowed difference. λ1≤λx≤λ2 and λ2-λx>c means that the current oxygen concentration is in the comfort concentration interval and is not too high.

[0121] S606, whether λ2-λx≤c is satisfied, if yes, it means that the current oxygen concentration is in the comfort concentration interval but is too high, the air volume needs to be reduced, S607 is entered, if not, S603 is returned.

[0122] S607, one core which has been started and has the smallest volume is reduced, and the current number of started cores is recorded.

[0123] S608, whether λ2-λx≤c is satisfied again, if yes, S614 is entered, if not, S609 is entered.

[0124] S609, whether λ1≤λx is satisfied, if yes, S616 is entered, if not, it means that the current oxygen concentration is lower than the lower limit value of the comfort concentration range, the air volume needs to be increased, S610 is entered.

[0125] S610, the core reduced in the last step is started.

[0126] S611, whether λ1≤λx≤λ2 and λ2-λx>c are satisfied, if yes, S616 is entered, if not, S612 is entered.

[0127] S612, whether λ1≤λx is satisfied, if yes, S613 is entered, if not, S617 is entered.

[0128] S613, the last three cores that have been started and connected in parallel are connected in series, and are connected in parallel with the previously started cores, and after running for a period of time, return to S612 to continue to judge. If the number of cores that have been started and connected in parallel is less than 3, the current state is maintained to run for m minutes and then return to S602 to continue to monitor the oxygen concentration.

[0129] S614, judge whether the number of currently running cores recorded is 1, if yes, enter S615, if no, return to S607.

[0130] S615, start the last two unstarted cores of the currently running cores, take the three cores in series, and then enter S611.

[0131] S616, maintain this state for m minutes, and then return to S602 to continue to monitor the oxygen concentration.

[0132] S617, cancel the series connection of the last step (i.e. cancel the series connection of S615 or S613), restore to the core running state before the series connection (for example, restore to one core running or restore to the core running state corresponding to S610), run for m minutes, and then return to S602.

[0133] As shown in FIG. 6, taking monitoring the carbon dioxide concentration in the room as an example, the air volume control includes the following steps: Figure 7

[0134] S701, the fresh air unit is started, the first s cores are connected in parallel, and the carbon dioxide concentration sensor is started. s=N×0.5, N represents the total number of cores, and if the total number of cores is odd, s takes the smallest integer greater than N×0.5. The "front" in the "first s cores" is in the direction of the fresh air flow, that is, the fresh air inlet is "front" and the fresh air outlet is "back".

[0135] S702, monitor the carbon dioxide concentration through the carbon dioxide concentration sensor. Specifically, at least two oxygen concentration sensors can be arranged in the room, and the average value θ of the readings of all oxygen concentration sensors is taken.

[0136] S703, judge whether the real-time θ is in the interval [θ1, θ2], if yes, enter S723, if no, enter S704. θ1 represents the fourth preset threshold, and θ2 represents the third preset threshold.

[0137] S704, judge whether θ<θ1 is satisfied, if yes, enter S705, if no, enter S715.

[0138] S705, reduce one core that has been started and has the smallest volume, and record the number of currently started cores.

[0139] ​S706, again determine whether θ < θ1 is satisfied, if yes, enter S712, if no, enter S707.

[0140] S707, determine whether θ > θ2 is satisfied, if no, enter S723, if yes, enter S708.

[0141] S708, start the core reduced in the last step.

[0142] S709, determine whether θ ∈ [θ1, θ2] is satisfied, if yes, enter S723, if no, enter S710.

[0143] S710, determine whether θ > θ2 is satisfied, if yes, enter S714, if no, enter S711.

[0144] S711, take the last three cores that have been started and connected in parallel and connect them in series, and connect them in parallel with the previously started cores, and return to S710 to continue to determine after running for a period of time. If the number of cores that have been started and connected in parallel is less than 3, maintain the current state and run for m minutes before returning to S702 to continue to monitor the oxygen concentration.

[0145] S712, determine whether the number of cores currently running recorded is 1, if yes, enter S713, if no, return to S705.

[0146] S713, start the last two cores that have not been started of the currently running cores, take the three cores in series, and then enter S709.

[0147] S714, cancel the series connection in the last step (i.e. cancel the series connection in S711, S713 or S721), restore the core running state before the series connection (for example, restore the core running state corresponding to S708, or restore one core running, or restore the core running state corresponding to S718), and return to S702 after running for m minutes.

[0148] S715, increase one core in parallel and record the number of currently started cores. Specifically, the first core after the currently started core with the smallest volume can be started.

[0149] S716, determine whether θ > θ2 is satisfied, if yes, enter S722, if no, enter S717.

[0150] S707, determine whether θ < θ1 is satisfied, if no, enter S723, if yes, enter S718.

[0151] S718, turn off the core increased in the last step.

[0152] S719, determine whether θ ∈ [θ1, θ2] is satisfied, if yes, enter S723, if no, enter S720.

[0153] S720, determine whether θ>θ2 is satisfied, if yes, enter S721, if no, enter S714.

[0154] S721, take the last three cores that have been started and connected in parallel to be connected in series, and in parallel with the previously started cores, run for a period of time and return to S720 for continuous judgment. If the number of cores that have been started and connected in parallel is less than 3, maintain the current state for m minutes and return to S702 for continuous monitoring of oxygen concentration.

[0155] S722, determine whether the number of currently running cores recorded is N, if yes, enter S723, if no, return to S715.

[0156] S723, maintain this state for m minutes, and then return to S702 for continuous monitoring of oxygen concentration.

[0157] As shown in Figure 8 , taking the fresh air volume of the monitoring unit as an example, the air volume control includes the following steps:

[0158] S801, the fresh air unit is started, s cores are connected in parallel before starting, and the air volume detector is started. s=N×0.5, N represents the total number of cores, if the total number of cores is odd, s takes the smallest integer greater than N×0.5. The "front" in "front s cores" is in the direction of fresh air flow, that is, the fresh air inlet is "front" and the fresh air outlet is "rear".

[0159] S802, monitor the fresh air volume P through the air volume detector.

[0160] S803, determine whether the real-time P is equal to P0, if yes, enter S823, if no, enter S804. P0 represents the required air volume.

[0161] S804, determine whether P>P0 is satisfied, if yes, enter S805, if no, enter S815.

[0162] S805, reduce one core that has been started and has the smallest volume, and record the current number of started cores.

[0163] S806, determine whether P>P0 is satisfied again, if yes, enter S812, if no, enter S807.

[0164] S807, determine whether P

[0165] S808, start the core reduced in the previous step.

[0166] S809, determine whether P=P0 is satisfied, if yes, enter S823, if no, enter S810.

[0167] S810, determine whether P>P0 is satisfied, if yes, go to S811, if no, go to S814.

[0168] S811, take the last three cores that have been started and connected in parallel and connect them in series, and connect them in parallel with the previously started cores, and return to S810 to continue to determine after running for a period of time. If the number of cores that have been started and connected in parallel is less than 3, maintain the current state for m minutes and return to S802 to continue to monitor the oxygen concentration.

[0169] S812, determine whether the number of cores currently running recorded is 1, if yes, go to S813, if no, return to S805.

[0170] S813, start the last two cores that have not been started of the currently running cores, take the three cores in series, and then go to S809.

[0171] S814, cancel the series connection of the previous step (i.e. cancel the series connection performed in S811, S813 or S821), and restore the core running state before the series connection (for example, restore the core running state corresponding to S808, or restore one core running, or restore the core running state corresponding to S818), and return to S802 after running for m minutes.

[0172] S815, increase one core for parallel connection, and record the number of currently started cores. Specifically, the first core after the currently started core with the smallest volume can be started.

[0173] S816, determine whether P

[0174] S807, determine whether P>P0 is satisfied, if no, go to S823, if yes, go to S818.

[0175] S818, turn off the core added in the previous step.

[0176] S819, determine whether P=P0 is satisfied, if yes, go to S823, if no, go to S820.

[0177] S820, determine whether P

[0178] S821, take the last three cores that have been started and connected in parallel and connect them in series, and connect them in parallel with the previously started cores, and return to S820 to continue to determine after running for a period of time. If the number of cores that have been started and connected in parallel is less than 3, maintain the current state for m minutes and return to S802 to continue to monitor the oxygen concentration.

[0179] S822, determine whether the number of currently running cores recorded is N, if yes, go to S823, if no, return to S815.

[0180] S823, maintain this state for m minutes, and then return to S802 to continue monitoring the oxygen concentration.

[0181] Example Four

[0182] The embodiment of the present application also provides a computer device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment of the present application.

[0183] Example Five

[0184] The embodiment of the present application also provides a nonvolatile computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to realize the steps of the method of the embodiment of the present application.

[0185] Through the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be realized by means of software plus necessary universal hardware platforms, and of course, can also be realized by hardware. Based on such understanding, the above technical solutions essentially or in other words, the part of the prior art that makes a contribution can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method described in each embodiment or some part of the embodiment.

[0186] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat exchange device, characterized in that, include: The housing is divided into at least three sequentially arranged receiving spaces, each containing a core. The housing is provided with an air vent corresponding to the position of each core, so that fresh air and return air can flow through the core for heat exchange, and the opening and closing of the air vent can be controlled; Air valves are installed between adjacent storage spaces, and the number of cores participating in heat exchange and the series-parallel connection mode of the cores are controlled by the air vents and air valves.

2. The heat exchange device according to claim 1, characterized in that, The housing is provided with a first fresh air inlet, a second fresh air inlet, a first return air inlet, and a second return air inlet at the position corresponding to each of the cores. Fresh air flows through the first fresh air inlet and the second fresh air inlet, and return air flows through the cores through the first return air inlet and the second return air inlet.

3. The heat exchange device according to claim 1, characterized in that, The adjacent storage spaces are separated by partitions, and each partition is equipped with a fresh air valve and a return air valve.

4. The heat exchange device according to claim 3, characterized in that, The partition is divided into a first part, a second part, a third part, and a fourth part. The first part and the second part are located on the fresh air side and correspond to different ventilation surfaces of the same core, respectively. The third part and the fourth part are located on the return air side and correspond to different ventilation surfaces of the same core, respectively. Starting with the fresh air inlet of the fresh air duct, the fresh air valve of the first partition is at least located in the part of the first partition corresponding to the fresh air outlet surface of the first core. The return air valve of the first partition is at least located in the part of the first partition corresponding to the return air inlet surface of the first core. The fresh air valve of the last partition is at least located in the part of the last partition corresponding to the fresh air inlet surface of the last core. The return air valve of the last partition is at least located in the part of the last partition corresponding to the return air outlet surface of the last core. Each part of the remaining partitions is equipped with a valve.

5. The heat exchange device according to any one of claims 1 to 4, characterized in that, Each core has the same volume and each air outlet has the same size.

6. The heat exchange device according to any one of claims 1 to 4, characterized in that, Along the direction of fresh air flow within the fresh air duct, the volume of each core gradually decreases, and / or the air outlets corresponding to each core gradually decrease.

7. The heat exchange device according to claim 6, characterized in that, The air vents corresponding to each core are reduced proportionally in sequence.

8. A fresh air handling unit, characterized in that, include: The heat exchange device according to any one of claims 1 to 7.

9. An air volume control method, applied to the fresh air handling unit as described in claim 8, characterized in that, The air volume control method includes: Monitor the air volume parameters of the area regulated by the fresh air handling unit; The air outlets and valves in the heat exchange device are controlled according to the air volume parameters to adjust the number of cores participating in heat exchange and the series-parallel connection mode of the cores.

10. The method according to claim 9, characterized in that, Before monitoring the airflow parameters of the area regulated by the fresh air handling unit, the following is also included: In response to the power-on command, the air vents corresponding to a preset number of cores are opened, and the preset number of cores are controlled to work in parallel mode.

11. The method according to claim 9, characterized in that, The air outlets and valves in the heat exchange device are controlled according to the air volume parameters to adjust the number of cores participating in heat exchange and the series-parallel connection mode of the cores, including: If the current airflow parameters indicate that an increase in airflow is required, then open the air vents corresponding to n cores and control these n cores to work in parallel mode. After a preset time, if the current airflow parameters still indicate that an increase in airflow is required, then open n more cores again, and so on, until all cores participate in heat exchange and work in parallel mode or until the current airflow parameters indicate that no increase in airflow is required, 1≤n≤N, where N represents the total number of cores; If the current airflow parameters indicate that the airflow needs to be reduced, then remove one core from the core currently participating in heat exchange and close the air vent corresponding to that core. After a preset time, if the current airflow parameters still indicate that the airflow needs to be reduced, then remove one core again, and so on, until the number of cores currently participating in heat exchange is 1 or the current airflow parameters indicate that the airflow does not need to be reduced. If the current airflow parameters indicate that no increase or decrease in airflow is required, then maintain the current operating state and return to the step of monitoring the airflow parameters of the area adjusted by the fresh air handling unit.

12. The method according to claim 11, characterized in that, If the current number of cores participating in heat exchange is 1, and the current airflow parameters indicate that the airflow still needs to be reduced, then the two cores located after the current core along the fresh air intake direction will be controlled to participate in heat exchange, and the three cores will be controlled to work in series mode.

13. The method according to claim 12, characterized in that, After controlling the two cores located after this core along the fresh air intake direction to participate in heat exchange, and controlling these three cores to operate in series mode, it also includes: If the current airflow parameters indicate that an increase in airflow is needed, then cancel the series connection of the three cores, restore the operation of a single core, and return to the step of monitoring the airflow parameters of the area regulated by the fresh air handling unit.

14. The method according to claim 11, characterized in that, After removing one core from the current heat exchange cores and closing the air vent corresponding to that core, the process also includes: If the current airflow parameters indicate that an increase in airflow is needed, then reopen the air vent corresponding to the core that was most recently reduced, and control that core to work in parallel mode. Subsequently, if the current airflow parameters indicate that the airflow needs to be reduced, the last three cores currently participating in heat exchange and in parallel mode are connected in series along the fresh air intake direction to form a core group, and this core group is controlled to be connected in parallel with other cores participating in heat exchange.

15. The method according to claim 14, characterized in that, After connecting the last three cores currently participating in heat exchange and in parallel mode in series along the fresh air intake direction to form a core group, and controlling this core group to be connected in parallel with other cores participating in heat exchange, the system further includes: If the current airflow parameters indicate that an increase in airflow is needed, then cancel the series connection of the core group, restore the core currently participating in heat exchange to parallel mode, and return to the step of monitoring the airflow parameters of the area regulated by the fresh air handling unit.

16. The method according to claim 11, characterized in that, After adding air vents corresponding to n cores and controlling these n cores to operate in parallel mode, it also includes: If the current airflow parameters indicate that the airflow needs to be reduced, then close the air vent corresponding to the most recently increased core. Subsequently, if the current airflow parameters indicate that an increase in airflow is required, the last three cores currently participating in heat exchange and in parallel mode are connected in series along the fresh air intake direction to form a core group, and this core group is controlled to be connected in parallel with other cores participating in heat exchange.

17. The method according to claim 16, characterized in that, After connecting the last three cores currently participating in heat exchange and in parallel mode in series along the fresh air intake direction to form a core group, and controlling this core group to be connected in parallel with other cores participating in heat exchange, the system further includes: If the current airflow parameters indicate that the airflow needs to be reduced, then cancel the series connection of the core group, restore the core currently participating in heat exchange to parallel mode, and return to the step of monitoring the airflow parameters of the area regulated by the fresh air handling unit.

18. The method according to claim 14 or 16, characterized in that, The last three cores currently participating in heat exchange are connected in series along the fresh air intake direction, including: If the number of cores currently participating in heat exchange and in parallel mode is less than 3, then maintain the current operating state and return to the step of monitoring the air volume parameters of the area regulated by the fresh air handling unit.

19. The method according to any one of claims 9 to 17, characterized in that, The air volume parameters include: oxygen concentration, carbon dioxide concentration, or air volume. Regarding oxygen concentration, if the current oxygen concentration is less than the first preset threshold, it means that the air volume needs to be increased; if the current oxygen concentration is greater than or equal to the first preset threshold and less than or equal to the second preset threshold, and the difference between the second preset threshold and the current oxygen concentration is less than or equal to the preset difference, it means that the air volume needs to be decreased; if the current oxygen concentration is greater than or equal to the first preset threshold and less than or equal to the second preset threshold, and the difference between the second preset threshold and the current oxygen concentration is greater than the preset difference, it means that no increase or decrease in air volume is needed. Regarding carbon dioxide concentration, if the current carbon dioxide concentration is greater than the third preset threshold, it means that the air volume needs to be increased; if the current carbon dioxide concentration is less than the fourth preset threshold, it means that the air volume needs to be decreased; if the current carbon dioxide concentration is greater than or equal to the fourth preset threshold and less than or equal to the third preset threshold, it means that no increase or decrease in air volume is needed. Regarding airflow, if the current airflow is less than the required airflow, it means that the airflow needs to be increased; if the current airflow is greater than the required airflow, it means that the airflow needs to be decreased; if the current airflow is equal to the required airflow, it means that there is no need to increase or decrease the airflow.

20. The method according to any one of claims 9 to 17, characterized in that, For cores connected in series, open the fresh air valve and return air valve on the partition between the cores connected in series, and open the air vents corresponding to the first and last cores connected in series. If the core is in parallel mode, open the air vent corresponding to the core and close all the fresh air valves and return air valves on the partition of the space containing the core.

21. A computer device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the steps of the method according to any one of claims 9 to 20.

22. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 9 to 20.

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