Air handling unit

Abstract

The present invention relates to the technical field of air handling apparatuses. Disclosed is an air handling unit, comprising a primary filter section, a medium-efficiency filter section, a cooling and heating coil section, a dehumidification section, a humidification section, a fan section, a chemical filter section and a high-efficiency filter section which are in communication with one another in sequence. The air handling unit further comprises a switching mechanism arranged between the cooling and heating coil section and the dehumidification section, wherein a fresh air inlet and a hot air inlet are provided at one end of the switching mechanism, three air outlets in communication with the dehumidification section are provided at the other end of the switching mechanism, and the fresh air inlet and the hot air inlet are both in communication with the cooling and heating coil section; and the switching mechanism is configured to communicate two of the three air outlets with the fresh air inlet to form a fresh air channel and to communicate the other one of the three air outlets with the hot air inlet to form a hot air channel, such that the fresh air channel and the hot air channel are alternately in communication with different locations of the dehumidification section. In the present invention, an adsorption function and a desorption function are integrated into the same air treatment section, thereby further reducing the size of the air handling unit.

Description

Air handling units Technical Field

[0001] This invention relates to the field of air handling equipment technology, and in particular to an air handling unit. Background Technology

[0002] Rotary dehumidifiers are highly efficient air handling equipment. Their core component is the dehumidifying rotor, made of a special material with a powerful moisture absorption capacity. The working principle of a rotary dehumidifier is to utilize the hygroscopic properties of the adsorption material; through the rotation of the rotor, moisture in the air is adsorbed and desorbed. This equipment is unaffected by ambient temperature and maintains good dehumidification performance even at low temperatures, making it particularly suitable for low-temperature and low-humidity conditions.

[0003] Rotary dehumidification is an isenthalpic process, which reduces air humidity but causes a temperature increase. Traditional dehumidification uses a thick rotary wheel. Since the lower the air temperature processed by the wheel, the better the dehumidification effect, a medium-temperature chilled water at around 12°C is passed before the wheel to reduce its workload. Because the temperature rises after dehumidification, a cooling coil is also installed after the wheel to further cool the air before it is supplied to the room. This type of rotary dehumidifier requires hot water or steam above 80°C for desorption and regeneration. The condensers of air compressors, heat pumps, and chillers in industrial buildings generate a large amount of heat, but this heat can only produce hot water at 40-60°C. Therefore, traditional rotary dehumidifiers require boilers to obtain hot water above 80°C. Boilers have very low heating efficiency and waste a lot of energy.

[0004] Based on the above issues, we discovered through experiments that dividing the originally thick rotor into multiple thin rotors (with a total thickness equal to the original single thick rotor) and cooling between two rotors creates a structure that achieves the same dehumidification effect as a traditional thick rotor. However, through this cycle of dehumidification-cooling-dehumidification-cooling, the desorption and regeneration temperature of the rotor can be reduced to below 60℃. This eliminates the need for a boiler to produce hot water and allows the utilization of waste heat from air compressors, heat pumps, etc., which would otherwise need to be discharged, thus reducing energy consumption in the factory area.

[0005] However, the above-mentioned dehumidification-cooling-dehumidification-cooling method also has a problem: it requires a lot of space. Each dehumidification or cooling process requires maintenance space. As the number of stages increases, the length of the unit also increases, resulting in the entire air handling unit being too large and requiring a large layout space. Summary of the Invention

[0006] The main objective of this invention is to propose an air handling unit that combines adsorption and desorption functions in the same air handling section through a switching mechanism, thereby further reducing the size of the air handling unit.

[0007] To achieve the above objectives, the present invention proposes an air handling unit, comprising, in sequence, a pre-filter section, a medium-efficiency filter section, a surface cooling and heating section, a dehumidification section, a humidification section, a fan section, a chemical filter section, and a high-efficiency filter section; wherein, the air handling unit further comprises a switching mechanism disposed between the surface cooling and heating section and the dehumidification section, one end of the switching mechanism having a fresh air inlet and a hot air inlet, and the other end of the switching mechanism having at least three air outlets, the fresh air inlet and the hot air inlet being connected to the surface cooling and heating section, and the three air outlets being respectively connected to the dehumidification section; the switching mechanism is used to connect two of the three air outlets to the fresh air inlet to form a fresh air channel, and to connect the other of the three air outlets to the hot air inlet to form a hot air channel, so that the fresh air channel and the hot air channel are alternately connected to different positions of the dehumidification section.

[0008] In one embodiment, the switching mechanism includes:

[0009] The outer casing has an inner cavity, a hot air inlet communicating with the inner cavity, and a fresh air inlet;

[0010] A desorption hot air duct is installed in the inner cavity, and one end of the desorption hot air duct is connected to the hot air inlet.

[0011] At least three air outlet ducts, one end of each air outlet duct being connected to one of the air outlets; and

[0012] A switching valve is provided, one end of which is connected to the other end of the desorbed hot air duct, and the other ends of the three air outlet ducts are respectively connected to the other end of the switching valve. The switching valve is used to alternately switch the desorbed hot air duct to one of the three air outlet ducts so that the other two of the three air outlet ducts are respectively connected to the fresh air inlet.

[0013] In one embodiment, the switching valve includes:

[0014] A bracket, which is fixed to the inner cavity;

[0015] A connecting pipe is provided on the support, the connecting pipe has at least three sub-channels and at least three air duct openings, each of the air duct openings is connected to the other end of an air outlet pipe and a sub-channel; the three sub-channels are arranged at intervals along the circumference of the connecting pipe.

[0016] A bellows, rotatably connected to the support and adjacent to the connecting pipe; the bellows has a hot air inlet and a hot air outlet; the hot air inlet is connected to the other end of the desorption hot air pipe; and

[0017] A driving component is fixed to the inner cavity and is connected to the bellows in a driving manner. The driving component is used to drive the bellows to rotate so that the hot air outlet alternately communicates with one of the three sub-channels, and the other two of the three sub-channels are respectively connected to the fresh air inlet.

[0018] In one embodiment, the connecting pipe is an annular pipe, and the three air duct openings are located on the outer wall of the connecting pipe; the air box is located at the central hole of the connecting pipe;

[0019] And / or, the air box includes a circular box and a fan-shaped box, the fan-shaped box is disposed on the outer wall of the circular box and communicates with the circular box; the hot air inlet is located at the center of the circular box, and the hot air outlet is located on the circumferential outer wall of the fan-shaped box; the driving component is connected to the circular box in a driving manner.

[0020] In one embodiment, the air handling unit further includes two switching mechanisms, which are located on both sides of the dehumidification section, with one end of each switching mechanism connected to the surface cooling heating section and the humidification section, and the other end of each switching mechanism connected to the dehumidification section.

[0021] In one embodiment, the dehumidification section includes at least two partitions and at least three dehumidification surface cooling modules, wherein one of the three dehumidification surface cooling modules and two of the three dehumidification surface cooling modules are arranged vertically, and one partition is located between the two lower dehumidification surface cooling modules, and the other partition is located between the two lower dehumidification surface cooling modules and the upper dehumidification surface cooling module, and each air outlet is connected to one of the dehumidification surface cooling modules.

[0022] In one embodiment, the airflow direction of the air handling unit is defined as a first direction;

[0023] Each of the dehumidification surface cooling modules includes at least three moisture-absorbing layers and at least two heat exchange layers. The three moisture-absorbing layers are arranged at intervals along the first direction, and each heat exchange layer is disposed between two adjacent moisture-absorbing layers. The moisture-absorbing layers are used to absorb moisture from the air, and the heat exchange layers are used to exchange heat with the air.

[0024] In one embodiment, the vertical direction is defined as the second direction, and the horizontal direction is defined as the third direction, and both the third direction and the second direction are perpendicular to the first direction;

[0025] Each of the moisture-absorbing layers includes a plurality of moisture-absorbing strips, which are stacked along the second direction. Each moisture-absorbing strip includes a plurality of moisture-absorbing sheets arranged along the third direction, and the two moisture-absorbing sheets of two adjacent moisture-absorbing strips are arranged in a staggered manner.

[0026] In one embodiment, the vertical direction is defined as the second direction, and the horizontal direction is defined as the third direction, and both the third direction and the second direction are perpendicular to the first direction;

[0027] Each of the heat exchange layers includes:

[0028] At least one medium inlet pipe is provided for introducing a heat exchange medium;

[0029] At least one medium discharge pipe, said medium discharge pipe being used to discharge the heat exchange medium; and

[0030] Multiple heat exchange tubes are provided, with their two ends connected to the medium inlet pipe and the medium outlet pipe, respectively. The multiple heat exchange tubes are arranged at intervals along the second direction, and a flow channel is formed between two adjacent heat exchange tubes. The flow channel is used for air circulation and for heat exchange with the outer wall of the heat exchange tube.

[0031] In one embodiment, each heat exchange layer further includes a plurality of heat exchange plates, each heat exchange plate being disposed in a flow channel, and each heat exchange plate being arranged along the extension direction of the heat exchange tube.

[0032] And / or, each of the heat exchange plates is a corrugated or zigzag heat exchange plate.

[0033] The air handling unit of the present invention includes, in sequence, a primary filter section, a medium-efficiency filter section, a surface cooling and heating section, a dehumidification section, a humidification section, a fan section, a chemical filter section, and a high-efficiency filter section. The air handling unit further includes a switching mechanism located between the surface cooling and heating section and the dehumidification section. One end of the switching mechanism has a fresh air inlet and a hot air inlet, and the other end has two air outlets. Both the fresh air inlet and the hot air inlet are connected to the surface cooling and heating section, and the two air outlets are respectively connected to the dehumidification section. The switching mechanism is used to connect one of the two air outlets to the fresh air inlet to form a fresh air channel, and to connect the other of the two air outlets to the hot air inlet to form a hot air channel, so that the fresh air channel and the hot air channel are alternately connected to different positions of the dehumidification section. A switching mechanism is added between the surface cooling heating section and the dehumidification section. One end has a fresh air inlet and a hot air inlet, and the other end has two air outlets. In this way, the air handling unit only needs to use the switching mechanism to switch the position of the fresh air channel and the hot air channel connected to the dehumidification section. This allows each position in the dehumidification section to alternately perform adsorption and desorption functions, eliminating the need for additional desorption equipment at the desorption points in the dehumidification section. In this way, the entire air handling unit combines adsorption and desorption functions in the same air handling section of the dehumidification section by setting up a switching mechanism, thereby reducing the desorption regeneration temperature. This temperature can be obtained through heat recovery from the chiller or air compressor in the plant area, achieving energy consumption without boilers, thereby further reducing the size of the air handling unit. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 is a structural schematic diagram of an embodiment of the air handling unit provided by the present invention;

[0036] Figure 2 is a schematic diagram of the two switching mechanisms and the dehumidification section of the air handling unit provided by the present invention;

[0037] Figure 3 is a structural schematic diagram of a switching mechanism and a dehumidification section of the air handling unit provided by the present invention;

[0038] Figure 4 is a schematic diagram of the switching valve of the air handling unit provided by the present invention from one perspective.

[0039] Figure 5 is a structural schematic diagram of the switching valve of the air handling unit provided by the present invention from another perspective.

[0040] Figure 6 is a structural schematic diagram of the dehumidification section of the air handling unit provided by the present invention from one perspective.

[0041] Figure 7 is an exploded view of the dehumidification section of the air handling unit provided by the present invention;

[0042] Figure 8 is a schematic diagram of the structure of the moisture-absorbing layer of the dehumidification section of the air handling unit provided by the present invention;

[0043] Figure 9 is a schematic diagram of the heat exchange layer of the dehumidification section of the air handling unit provided by the present invention.

[0044] Explanation of icon numbers:

[0045] 1. Primary filter section; 2. Secondary filter section; 3. Surface cooling and heating section; 4. Dehumidification section; 41. Baffle plate; 42. Dehumidification surface cooling module; 421. Moisture absorption layer; 421a. Moisture absorption fins; 422. Heat exchange layer; 4221. Medium inlet pipe; 4222. Medium outlet pipe; 4223. Heat exchange tube; 422a. Flow channel; 4224. Heat exchange fins;

[0046] 5. Humidification section; 6. Fan section; 7. Chemical filtration section; 8. High-efficiency filter section; 9. Switching mechanism; 9a. Fresh air inlet; 9b. Hot air inlet; 9c. Air outlet; 91. Housing; 92. Desorption hot air duct; 93. Air outlet duct; 94. Switching valve; 941. Bracket; 942. Connecting duct; 942a. Sub-channel; 942b. Air duct opening; 924c. Air duct partition; 943. Air box; 943a. Hot air inlet; 943b. Hot air outlet; 944. Drive unit.

[0047] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0050] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0051] This invention proposes an air handling unit.

[0052] Please refer to Figures 1 and 2. In one embodiment of the present invention, the air handling unit includes a primary filter section 1, a medium-efficiency filter section 2, a surface cooling and heating section 3, a dehumidification section 4, a humidification section 5, a fan section 6, a chemical filter section 7, and a high-efficiency filter section 8 connected in sequence. The air handling unit also includes a switching mechanism 9 disposed between the surface cooling and heating section 3 and the dehumidification section 4. One end of the switching mechanism 9 has a fresh air inlet 9a and a hot air inlet 9b, and the other end of the switching mechanism 9 has three air outlets 9c. The fresh air inlet 9a and the hot air inlet 9b are both connected to the surface cooling and heating section 3, and the three air outlets 9c are respectively connected to the dehumidification section 4. The switching mechanism 9 is used to connect two of the three air outlets 9c to the fresh air inlet 9a to form a fresh air channel, and to connect the other of the three air outlets 9c to the hot air inlet 9b to form a hot air channel, so that the fresh air channel and the hot air channel are alternately connected to different positions of the dehumidification section 4.

[0053] Specifically, the pre-filter section 1 is mainly used to perform preliminary filtration of the air entering the air handling unit to remove larger dust particles; the medium-efficiency filter section 2 performs deeper filtration of the air to remove fine particles; the surface cooling and heating section 3 cools or heats the air; the dehumidification section 4 reduces the humidity of the air; the humidification section 5 increases the humidity of the air; the fan section 6 provides the power for airflow; the chemical filter section 7 removes harmful chemicals from the air; and the high-efficiency filter section 8 performs the final filtration of the air to ensure that the output air reaches a high level of cleanliness.

[0054] In addition, the air handling unit also includes a switching mechanism 9 located between the surface cooling and heating section 3 and the dehumidification section 4. One end of the switching mechanism 9 has a fresh air inlet 9a and a hot air inlet 9b, and the other end has three air outlets 9c. The fresh air inlet 9a and the hot air inlet 9b are both connected to the surface cooling and heating section 3, and the three air outlets 9c are respectively connected to the dehumidification section 4.

[0055] When the first position of the dehumidification section 4 requires air dehumidification, the switching mechanism 9 connects one of the air outlets 9c to the fresh air inlet 9a, forming a fresh air channel. This fresh air channel connects to the first position of the dehumidification section 4, allowing the first position of the dehumidification section 4 to dehumidify the fresh air flowing through the fresh air channel, thus achieving the dehumidification function. Simultaneously, when the second and third positions of the dehumidification section 4 require moisture desorption, the switching mechanism connects the other two air outlets 9c to the hot air inlet 9b, forming a hot air channel. This allows the second and third positions of the dehumidification section 4 to connect to the hot air channel, enabling the hot air flowing out of the fresh air channel to desorb moisture from the second and third positions of the dehumidification section 4, thus achieving the desorption function. Conversely, by alternately connecting the three air outlets 9c to the fresh air inlet 9a and the hot air inlet 9b via the switching mechanism 9, moisture can be desorbed from one of the three positions of the dehumidification section 4, while the other two positions of the dehumidification section 4 are used to dehumidify the fresh air.

[0056] This invention adds a switching mechanism 9, located between the surface cooling heating section 3 and the dehumidification section 4. One end of the switching mechanism 9 has a fresh air inlet 9a and a hot air inlet 9b, and the other end has three air outlets 9c. In this way, the air handling unit only needs to use the switching mechanism 9 to switch the position of the fresh air channel and the hot air channel connected to the dehumidification section 4, so that each position of the dehumidification section 4 can alternately realize the adsorption and desorption functions. There is no need to set up a separate desorption device to desorb the positions of the dehumidification section 4 that need desorption. In this way, the entire air handling unit combines the adsorption and desorption functions in the same air handling section of the dehumidification section by setting up a switching mechanism, thereby reducing the desorption regeneration temperature. This temperature can be obtained through the heat recovery of the chiller or the air compressor in the plant area, realizing the energy consumption of generating high-temperature hot water in the boiler, thereby further reducing the size of the air handling unit.

[0057] In one embodiment, referring to Figures 1 to 5, the switching mechanism 9 includes a housing 91, a desorption hot air duct 92, at least three air outlet ducts 93, and a switching valve 94. The housing 91 has an inner cavity, a hot air inlet 9b communicating with the inner cavity, and a fresh air inlet 9a. Installed in the inner cavity, one end of the desorption hot air duct 92 is connected to the hot air inlet 9b. One end of each air outlet duct 93 is connected to an air outlet 9c. One end of the switching valve 94 is connected to the other end of the desorption hot air duct 92, and the other ends of the three air outlet ducts 93 are respectively connected to the other end of the switching valve 94. The switching valve 94 is used to alternately switch the desorption hot air duct 92 to one of the three air outlet ducts 93, so that the other two of the three air outlet ducts 93 are respectively connected to the fresh air inlet 9a.

[0058] In one embodiment, referring to Figures 2 to 5, the switching valve 94 includes a bracket 941, a connecting pipe 942, an air box 943, and a driving component 944. The bracket 941 is fixed to the inner cavity; the connecting pipe 942 is disposed on the bracket 941, and the connecting pipe 942 has at least three sub-channels 942a and at least three air duct openings 942b. Each air duct opening 942b is connected to the other end of an air outlet pipe 93 and a sub-channel 942a; the three sub-channels 942a are arranged at intervals along the circumference of the connecting pipe 942; the air box 943... 43 is rotatably connected to the bracket 941 and adjacent to the connecting pipe 942; the air box 943 has a hot air inlet 943a and a hot air outlet 943b; the hot air inlet 943a is connected to the other end of the desorption hot air pipe 92; the driving member 944 is fixed in the inner cavity and is connected to the air box 943 in a transmission manner. The driving member 944 is used to drive the air box 943 to rotate so that the hot air outlet 943b is alternately connected to one of the three sub-channels 942a, and the other two of the three sub-channels 942a are respectively connected to the fresh air inlet 9a.

[0059] Initially, the drive unit 944 is not running, and the air box 943 does not rotate relative to the connecting pipe 942. The hot air outlet 943b of the air box 943 is connected to one of the sub-channels 942a, which is temporarily referred to as the first sub-channel 942a. The air duct 942b and the air outlet pipe corresponding to the first sub-channel 942a are connected to the first position of the dehumidification section 4. At this time, the hot air flowing out of the air box 943 can desorb the first position of the dehumidification section 4 connected to the first sub-channel 942a. The hot air outlet 943b is not connected to the other two sub-channels 942a. 42a is connected. The other two sub-channels 942a here are temporarily referred to as the second sub-channel 942a and the third sub-channel 942a. The two air ducts 942b and the air outlet pipes corresponding to the second sub-channel 942a and the third sub-channel 942a are connected to the second and third positions of the dehumidification section 4. At this time, the fresh air entering from the fresh air inlet 9a of the outer shell 91 will flow directly through the second sub-channel 942a and the third sub-channel 942a into the corresponding air outlet pipes, and finally flow into the second and third positions of the dehumidification section 4 to dehumidify the fresh air through the second and third positions of the dehumidification section 4.

[0060] After the initial state described above continues for a period of time, the first position of the dehumidification section 4 desorbs and dries, while the second and third positions of the dehumidification section 4 absorb moisture to a certain degree. At this time, the switching valve 94 of the control switching mechanism 9 operates, and the driving component 944 drives the air box 943 to rotate relative to the connecting pipe 942, so that the first sub-channel 942a of the connecting pipe 942 connects with the fresh air inlet 9a of the outer casing 91, allowing fresh air to enter the first position of the dehumidification section 4 through the first sub-channel 942a, and the first position of the dehumidification section 4 absorbs and dries the fresh air; while the connecting pipe The second sub-channel 942a of 942 is connected to the hot air outlet 943b of the bellows 943, so that the hot air from the bellows 943 enters the second sub-channel 942a of the connecting pipe 942 from the hot air outlet 943b, so that the hot air enters the second position of the dehumidification section 4 through the second sub-channel 942a, so as to desorb and dry the second position of the dehumidification section 4; the third sub-channel 942a of the second connecting pipe 942 continues to be connected to the fresh air inlet 9a of the outer shell 91, so that the fresh air continues to enter the third position of the dehumidification section 4 through the third sub-channel 942a.

[0061] Similarly, two of the three positions of the dehumidification section 4 are connected to the fresh air inlet 9a of the outer casing to dehumidify and dry the fresh air; the remaining one of the three positions of the dehumidification section 4 is connected to the hot air outlet 943b of the air box 943 to desorb and dry the remaining one position of the dehumidification section 4.

[0062] The bellows 943 is rotatably connected to the bracket 941 and adjacent to the connecting pipe 942. This layout allows the bellows 943 to operate more flexibly. The bellows 943 has a hot air inlet 943a and a hot air outlet 943b. The hot air inlet 943a is connected to the other end of the desorption hot air pipe 92, further optimizing the flow path of the hot air and improving the utilization efficiency of thermal energy.

[0063] Furthermore, the drive component 944 is fixed to the inner cavity and is connected to the bellows 943 via a transmission connection. The drive component 944 drives the bellows 943 to rotate, so that the hot air outlet 943b alternately connects to one of the three sub-channels 942a, while the other two of the three sub-channels 942a connect to the fresh air inlet 9a. This design allows for efficient switching between hot air and fresh air, ensuring a sufficient supply of hot air while avoiding waste.

[0064] Furthermore, the connecting pipe 942 also has at least three air duct partitions 942c, with one air duct partition 942c between two adjacent sub-channels 942a to isolate the two adjacent sub-channels 942a and ensure that the airflow can flow normally in the three sub-channels 942a.

[0065] In one embodiment, referring to Figures 4 and 5, the connecting pipe 942 is an annular pipe, and three air duct openings 942b are located on the outer wall of the connecting pipe 942; the air box 943 is located at the center hole of the connecting pipe 942; the air box 943 includes a circular box and a fan-shaped box, the fan-shaped box is located on the outer wall of the circular box and communicates with the circular box; the hot air inlet 943a is located at the center of the circular box, and the hot air outlet 943b is located on the circumferential outer wall of the fan-shaped box; the driving member 944 is connected to the circular box in a driving manner.

[0066] The bellows 943 is located at the center of the connecting pipe 942, and its structure includes a circular box and a sector box. The circular box is located in the center of the bellows 943, while the sector box is located on the outer wall of the circular box and communicates with it. This design facilitates uniform airflow distribution and efficient utilization. A hot air inlet 943a is located at the center of the circular box, which is used to introduce hot air and provide a heat source for the annular pipe. The design of the hot air inlet 943a should ensure uniform distribution of hot air and avoid localized overheating or undercooling. The outer wall of the circular box communicates with the sector box, allowing hot air to flow smoothly from the circular box to the sector box. A hot air outlet 943b is located on the circumferential outer wall of the sector box, which is used to exhaust hot air from the sector box, achieving hot air recycling. The design of the hot air outlet 943b should consider aerodynamic principles to ensure uniform distribution and efficient utilization of hot air.

[0067] Compared to the traditional connecting pipe 942, the annular pipe has a larger flow cross-section, thereby reducing air resistance and allowing hot air to flow more smoothly. Furthermore, the three sub-channels 942a are evenly spaced within the connecting pipe 942, ensuring a more uniform distribution of hot air during flow, overcoming the problems of low heating efficiency and uneven heating in existing technologies. The hot air inlet 943a is located at the center of the circular box, and the hot air outlet 943b is located on the circumferential outer wall of the fan-shaped box. This design helps to create a good flow state of hot air inside the air box 943, improving the utilization rate of hot air.

[0068] In one embodiment, referring to Figures 1 and 2, the air handling unit further includes two switching mechanisms 9, which are located on both sides of the dehumidification section 4. One end of each switching mechanism 9 is connected to the surface cooling heating section 3 and the humidification section 5, respectively, and the other end of each switching mechanism 9 is connected to the dehumidification section 4.

[0069] The inclusion of two switching mechanisms 9 makes the air handling process more flexible, allowing switching to be made according to actual needs and improving the adaptability of the air handling unit. One end of each switching mechanism 9 is connected to the surface cooling heating section 3 and the humidification section, respectively, while the other end is connected to the dehumidification section 4, ensuring the continuity and stability of the air during the handling process.

[0070] By setting up two switching mechanisms 9 on both sides of the dehumidification section 4, and switching their positions synchronously, flexible control of the air handling process is achieved. This design greatly improves the working efficiency and operational stability of the air handling unit, meeting the air handling requirements under different operating conditions.

[0071] In one embodiment, referring to Figures 6 to 9, the dehumidification section 4 includes at least two partitions 41 and at least three dehumidification surface cooling modules 42. One of the three dehumidification surface cooling modules 42 is arranged vertically with two other of the three dehumidification surface cooling modules 42. One partition 41 is located between the two lower dehumidification surface cooling modules 42, and the other partition 41 is located between the two lower dehumidification surface cooling modules and the upper dehumidification surface cooling module. Each air outlet 9c is connected to a dehumidification surface cooling module 42.

[0072] Specifically, the partition 41 is a flat plate structure, and its main function is to separate the three dehumidification surface cooling modules 42. This allows the hot air inlet and outlet of the control air box 943 controlled by the switching valve 94 to connect with one of the three sub-channels 942a of the connecting pipe 942. It also allows the other two of the three air duct openings 942b of the connecting pipe 942 to connect with two dehumidification surface cooling modules 42 respectively, guiding the airflow to flow separately within the two modules. This prevents hot air and fresh air from mixing, which would affect the switching mechanism 9's execution of dehumidification and desorption modes for the two dehumidification surface cooling modules 42. Simultaneously, the partition has thermal insulation properties, and the size and shape of the partition 41 can be adjusted according to actual needs and installation space.

[0073] Three dehumidification cooling modules 42 are arranged vertically, defined as a first dehumidification cooling module 42, a second dehumidification cooling module 42, and a third dehumidification cooling module 42. Two partitions 41 are defined as a first partition 41 and a second partition 41. The first dehumidification cooling module 42 is located above the first partition 41, while the second and third dehumidification cooling modules 42 are located below the first partition 41. The second and third dehumidification cooling modules 42 are arranged horizontally, with the second partition 41 located between them. This vertical arrangement helps improve dehumidification efficiency and makes the entire dehumidification section 4 more compact.

[0074] Furthermore, the connecting pipe 942 of the switching mechanism 9 includes three sub-channels 942a and three air duct openings 942b. Each sub-channel 942a is correspondingly arranged with one air duct opening 942b. Two adjacent sub-channels 942a are arranged at a 120-degree angle, and two adjacent air duct openings 942b are also arranged at a 120-degree angle.

[0075] Each dehumidifier cooling section is equipped with a sealing plate at both ends to ensure that the dehumidifier cooling section is in close contact with the surrounding partitions, thereby ensuring that all air passes through dehumidification and cooling.

[0076] In one embodiment, referring to Figures 6 to 9, the airflow direction of the air handling unit is defined as the first direction; each dehumidification surface cooling module 42 includes at least three moisture-absorbing layers 421 and at least two heat exchange layers 422, the three moisture-absorbing layers 421 are arranged at intervals along the first direction, and each heat exchange layer 422 is disposed between two adjacent moisture-absorbing layers 421; the moisture-absorbing layers 421 are used to absorb moisture from the air, and the heat exchange layers 422 are used to exchange heat with the air.

[0077] In this embodiment, the moisture-absorbing layer 421 uses a high-performance moisture-absorbing material, which can effectively absorb moisture from the air. The heat exchange layer 422 uses a high-efficiency heat exchange material, which can quickly exchange heat with the air and reduce the air temperature. Airflow direction: The airflow direction is the first direction, that is, from the inlet to the outlet.

[0078] Each dehumidification surface cooling module 42 of the present invention includes at least three moisture-absorbing layers 421 and at least two heat exchange layers 422. The three moisture-absorbing layers 421 are arranged at intervals along a first direction, and each heat exchange layer 422 is disposed between two adjacent moisture-absorbing layers 421.

[0079] The moisture-absorbing layer 421 is used to absorb moisture from the air. Three moisture-absorbing layers 421 are arranged at intervals along the first direction, allowing air to fully contact the moisture-absorbing layer 421 as it passes through the dehumidification surface cooling module 42, thus improving the dehumidification effect. This not only helps reduce air humidity but also controls air temperature. The heat exchange layer 422 is used for heat exchange with the air. The heat exchange layer 422 between two adjacent moisture-absorbing layers 421 can effectively transfer the heat adsorbed on the moisture-absorbing layer 421 to the air, reducing the air temperature. This structural design helps achieve both air dehumidification and cooling functions, improving air handling efficiency.

[0080] In one embodiment, referring to Figures 6 to 9, the vertical direction is defined as the second direction, and the horizontal direction is defined as the third direction, and both the third direction and the second direction are perpendicular to the first direction; each moisture-absorbing layer 421 includes a plurality of moisture-absorbing strips, which are stacked along the second direction, and each moisture-absorbing strip includes a plurality of moisture-absorbing sheets 421a arranged along the third direction, and the two moisture-absorbing sheets 421a of two adjacent moisture-absorbing strips are staggered.

[0081] The second direction is defined as the vertical direction, perpendicular to the first direction, that is, the direction from the top to the bottom of the product; the third direction is defined as the horizontal direction, which is also perpendicular to the first direction and parallel to the bottom surface of the product.

[0082] The moisture-absorbing layer 421 includes a plurality of moisture-absorbing strips stacked along a second direction, i.e., vertically. Each moisture-absorbing strip consists of a plurality of moisture-absorbing sheets 421a arranged along a third direction, i.e., horizontally. This structure allows the moisture-absorbing layer 421 to provide moisture absorption capacity not only in the vertical direction but also to expand the moisture-absorbing area in the horizontal direction.

[0083] Furthermore, the absorbent sheets 421a between two adjacent absorbent strips are arranged in a staggered manner, meaning that the edge of one absorbent sheet 421a of one absorbent strip is not completely aligned with the edge of the absorbent sheet 421a of the adjacent absorbent strip. This staggered arrangement ensures structural stability and tightness of the splicing position.

[0084] The moisture-absorbing sheet 421a is made up of individual moisture-absorbing materials with a length, width, and height of 200mm × 120mm × 20mm.

[0085] In one embodiment, referring to Figures 6 to 9, the vertical direction is defined as the second direction, and the horizontal direction is defined as the third direction, and both the third direction and the second direction are perpendicular to the first direction; each heat exchange layer 422 includes at least one medium inlet pipe 4221, at least one medium outlet pipe 4222, and multiple heat exchange tubes 4223; the medium inlet pipe 4221 is used to introduce the heat exchange medium; the medium outlet pipe 4222 is used to discharge the heat exchange medium; the two ends of the multiple heat exchange tubes 4223 are respectively connected to the medium inlet pipe 4221 and the medium outlet pipe 4222, and the multiple heat exchange tubes 4223 are arranged at intervals along the second direction, and a flow channel 422a is formed between two adjacent heat exchange tubes 4223. The flow channel 422a is used to allow air to circulate and to contact the outer wall of the heat exchange tube 4223 for heat exchange.

[0086] At least one medium inlet pipe 4221 is used to introduce the heat exchange medium, and it is located at the bottom or side of the heat exchanger. At least one medium outlet pipe 4222 is used to discharge the heat exchange medium, and it is located at the top or side of the heat exchanger. The number of multiple heat exchange tubes 4223 is determined according to the design requirements of the heat exchanger, and their two ends are connected to the medium inlet pipe 4221 and the medium outlet pipe 4222, respectively.

[0087] Multiple heat exchange tubes 4223 are arranged at intervals along a second direction, with a flow channel 422a formed between adjacent heat exchange tubes 4223. The flow channel 422a is used for air circulation and contacts the outer wall of the heat exchange tubes 4223 for heat exchange. The heat exchange medium enters the heat exchange layer 422 through the medium inlet pipe 4221. The heat exchange medium flows inside the heat exchange tubes 4223 and exchanges heat with the air. The heat-exchanged medium is discharged from the heat exchange layer 422 through the medium outlet pipe 4222.

[0088] Each heat exchange layer 422 includes at least one medium inlet pipe 4221, at least one medium outlet pipe 4222, and multiple heat exchange tubes 4223. This structural design allows the heat exchange medium to enter and exit smoothly, greatly improving the continuity and stability of heat exchange. The effective arrangement of the medium inlet pipe 4221 and the medium outlet pipe 4222 ensures the circulation of the heat exchange medium in the system, avoiding a decrease in heat exchange efficiency due to poor medium flow. Furthermore, the two ends of the multiple heat exchange tubes 4223 are connected to the medium inlet pipe 4221 and the medium outlet pipe 4222, respectively, and are arranged at intervals along the second direction, forming a flow channel 422a between adjacent heat exchange tubes 4223. This design allows air to circulate freely in the flow channel 422a and contact the outer wall of the heat exchange tubes 4223 for heat exchange, improving the efficiency and speed of heat exchange. At the same time, this structure also facilitates the uniform distribution of the heat exchange medium, avoiding a decrease in heat exchange efficiency due to uneven medium distribution.

[0089] To enhance fluid heat exchange performance, the medium flow direction of heat exchange tube 4223 is set opposite to the air flow direction in flow channel 422a, that is, air and water adopt a counter-flow pattern, and the fresh air flow direction is opposite to the flow direction from chilled water supply manifold to return water manifold.

[0090] The lower two dehumidification cooling modules 42 are each connected to their respective heat exchange tubes 4223 via a separate medium inlet pipe 4221; each dehumidification cooling module 42 is also connected to its respective heat exchange tubes 4223 via a separate medium outlet pipe 4222. The medium inlet pipe 4221 enters from below the dehumidification cooling module 42 and connects to its heat exchange tubes 4223 below. The medium outlet pipe 4222 is located above the dehumidification cooling module 42 and connects to its heat exchange tubes 4223 above.

[0091] In one embodiment, referring to Figures 6 to 9, each heat exchange layer 422 further includes a plurality of heat exchange plates 4224, each heat exchange plate 4224 is disposed in a flow channel 422a, and each heat plate is arranged along the extension direction of the heat exchange tube 4223; each heat exchange plate 4224 is a corrugated or zigzag heat exchange plate 4224.

[0092] In this embodiment, the heat exchange layer 422 is composed of multiple heat exchange plates 4224, and the number of heat exchange plates 4224 can be adjusted according to actual needs and the size of the heat exchanger. The function of the heat exchange layer 422 is to increase the heat exchange area and improve the heat exchange efficiency. Each heat exchange plate 4224 is disposed in a flow channel 422a and arranged along the extension direction of the heat exchange tube 4223. The heat exchange plates 4224 are preferably corrugated or zigzag-shaped, which helps to increase the contact area between the fluid and the heat exchange plates 4224, thereby improving the heat exchange efficiency. The material of the heat exchange plates 4224 can be selected according to the actual application scenario, such as stainless steel, copper, aluminum, etc. The flow channel 422a is a channel for fluid flow. When the fluid flows in the flow channel 422a, it exchanges heat with the heat exchange plates 4224. The design of the flow channel 422a should ensure that the fluid is evenly distributed in the channel to improve the heat exchange effect. The heat exchange tube 4223 is a major component of the heat exchanger, used to support the heat exchange layer 422 and the heat exchange fins 4224. The material and size of the heat exchange tube 4223 can be selected according to the actual application scenario and requirements.

[0093] Each heat exchange layer 422 includes multiple heat exchange plates 4224 disposed in a flow channel 422a and arranged along the extension direction of the heat exchange tube 4223. This structural design optimizes the spatial layout of the heat exchange plates 4224, allowing the fluid to be distributed more evenly as it flows through the heat exchange layer 422, thereby improving heat exchange efficiency. Compared with the prior art, the present invention can provide higher heat exchange efficiency under the same conditions, which is of great significance for improving energy utilization and reducing energy consumption.

[0094] Each heat exchange fin 4224 adopts a corrugated or zigzag structure. This unique design increases the surface area of ​​the heat exchange fin 4224, thereby increasing the heat exchange area and making the heat exchange process more complete. The corrugated or zigzag heat exchange fin 4224 can better capture and transfer heat energy, effectively improving heat exchange efficiency and reducing heat loss.

[0095] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air handling unit, characterized in that, The air handling unit includes a pre-filter section, a medium-efficiency filter section, a surface cooling and heating section, a dehumidification section, a humidification section, a fan section, a chemical filter section, and a high-efficiency filter section connected in sequence. The air handling unit also includes a switching mechanism located between the surface cooling and heating section and the dehumidification section. One end of the switching mechanism has a fresh air inlet and a hot air inlet, and the other end has at least three air outlets. Both the fresh air inlet and the hot air inlet are connected to the surface cooling and heating section, and the three air outlets are respectively connected to the dehumidification section. The switching mechanism is used to connect two of the three air outlets to the fresh air inlet to form a fresh air channel, and to connect the other of the three air outlets to the hot air inlet to form a hot air channel, so that the fresh air channel and the hot air channel are alternately connected to different positions of the dehumidification section. The switching mechanism includes: The outer casing has an inner cavity, a hot air inlet communicating with the inner cavity, and a fresh air inlet; A desorption hot air duct is installed in the inner cavity, and one end of the desorption hot air duct is connected to the hot air inlet. At least three air outlet ducts, one end of each air outlet duct being connected to one of the air outlets; and A switching valve is provided, one end of which is connected to the other end of the desorbed hot air duct, and the other ends of the three air outlet ducts are respectively connected to the other end of the switching valve. The switching valve is used to alternately switch the desorbed hot air duct to one of the three air outlet ducts so that the other two of the three air outlet ducts are respectively connected to the fresh air inlet. The switching valve includes: A bracket, which is fixed to the inner cavity; A connecting pipe is provided on the support, the connecting pipe has at least three sub-channels and at least three air duct openings, each of the air duct openings is connected to the other end of an air outlet pipe and a sub-channel; the three sub-channels are arranged at intervals along the circumference of the connecting pipe. A bellows, rotatably connected to the support and adjacent to the connecting pipe; the bellows has a hot air inlet and a hot air outlet; the hot air inlet is connected to the other end of the desorption hot air pipe; and A driving component is fixed to the inner cavity and is connected to the bellows in a driving connection. The driving component is used to drive the bellows to rotate so that the hot air outlet is alternately connected to one of the three sub-channels, and the other two of the three sub-channels are respectively connected to the fresh air inlet. The connecting pipe is a ring-shaped pipe, and the three air duct openings are located on the outer wall of the connecting pipe; the air box is located at the center hole of the connecting pipe; And / or, the air box includes a circular box and a fan-shaped box, the fan-shaped box is disposed on the outer wall of the circular box and communicates with the circular box; the hot air inlet is located at the center of the circular box, and the hot air outlet is located on the circumferential outer wall of the fan-shaped box; the driving component is connected to the circular box in a driving manner.

2. The air handling unit as described in claim 1, characterized in that, The air handling unit also includes two switching mechanisms, which are located on both sides of the dehumidification section. One end of each switching mechanism is connected to the surface cooling heating section and the humidification section, respectively, and the other end of each switching mechanism is connected to the dehumidification section.

3. The air handling unit as described in claim 1, characterized in that, The dehumidification section includes at least two partitions and at least three dehumidification surface cooling modules, wherein one of the three dehumidification surface cooling modules is arranged vertically with two of the three dehumidification surface cooling modules, and one partition is located between the two lower dehumidification surface cooling modules, and the other partition is located between the two lower dehumidification surface cooling modules and the upper dehumidification surface cooling module, and each air outlet is connected to one of the dehumidification surface cooling modules.

4. The air handling unit as described in claim 3, characterized in that, The airflow direction of the air handling unit is defined as the first direction; Each of the dehumidification surface cooling modules includes at least three moisture-absorbing layers and at least two heat exchange layers. The three moisture-absorbing layers are arranged at intervals along the first direction, and each heat exchange layer is disposed between two adjacent moisture-absorbing layers. The moisture-absorbing layers are used to absorb moisture from the air, and the heat exchange layers are used to exchange heat with the air.

5. The air handling unit as described in claim 4, characterized in that, The vertical direction is defined as the second direction, and the horizontal direction is defined as the third direction, and both the third direction and the second direction are set perpendicular to the first direction; Each of the moisture-absorbing layers includes a plurality of moisture-absorbing strips, which are stacked along the second direction. Each moisture-absorbing strip includes a plurality of moisture-absorbing sheets arranged along the third direction, and the two moisture-absorbing sheets of two adjacent moisture-absorbing strips are arranged in a staggered manner.

6. The air handling unit as described in claim 5, characterized in that, The vertical direction is defined as the second direction, and the horizontal direction is defined as the third direction, and both the third direction and the second direction are set perpendicular to the first direction; Each of the heat exchange layers includes: At least one medium inlet pipe is provided for introducing a heat exchange medium; At least one medium discharge pipe, said medium discharge pipe being used to discharge the heat exchange medium; and Multiple heat exchange tubes are provided, with their two ends connected to the medium inlet pipe and the medium outlet pipe, respectively. The multiple heat exchange tubes are arranged at intervals along the second direction, and a flow channel is formed between two adjacent heat exchange tubes. The flow channel is used for air circulation and for heat exchange with the outer wall of the heat exchange tube.

7. The air handling unit as described in claim 6, characterized in that, Each heat exchange layer further includes a plurality of heat exchange plates, each heat exchange plate is disposed in a flow channel, and each heat exchange plate is arranged along the extension direction of the heat exchange tube. And / or, each of the heat exchange plates is a corrugated or zigzag heat exchange plate.

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