Air handling units

Abstract

The present invention discloses an air handling unit, which relates to the technical field of air handling equipment. The air handling unit includes a primary filter section, a medium 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 that are connected in sequence; the air handling unit also includes a switching mechanism arranged 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 of the switching mechanism has three air outlets connected to the dehumidification section, and the fresh air inlet and the hot air inlet are both connected to the surface cooling and heating 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 another 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 present invention integrates adsorption function and desorption function in the same air handling section, further reducing the volume of the air handling unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air handling equipment, and in particular to an air handling unit. Background Art

[0002] A rotary dehumidifier is a highly efficient air treatment device. Its core component is the dehumidification wheel, made of special materials with a strong moisture absorption capacity. The dehumidifier's operating principle is to utilize the hygroscopic properties of the adsorbent material to adsorb and desorb moisture from the air through the rotation of the wheel. This device is unaffected by ambient temperature and maintains excellent dehumidification performance even in low-temperature conditions, making it particularly suitable for low-temperature and low-humidity conditions.

[0003] Rotary dehumidification is an isenthalpic process that reduces air humidity but causes the temperature to rise. Traditional dehumidification systems use thick rotors. Because the lower the air temperature treated by the rotor, the better the dehumidification effect, to reduce the dehumidification burden, a medium-temperature chilled water flow of around 12°C is passed before the rotor, cooling the air before it enters the dehumidifier. Since the temperature rises after dehumidification, a surface cooling coil is also required behind the rotor to cool the air before it is delivered to the room. This type of rotor requires hot water or steam above 80°C for desorption and regeneration. The air compressors, heat pumps, and condensers of chillers in industrial buildings generate a large amount of heat, but this heat can only produce hot water at 40-60°C. Therefore, to obtain hot water above 80°C, traditional rotors must use boilers. This type of heating is very inefficient and wastes a lot of energy.

[0004] Based on the above problems, we found through experiments that if we cut the originally thick rotor into multiple thin rotors (the total thickness is the same as the thickness of the original single thick rotor) and cool down the rotors between the two rotors, this structure has the same dehumidification effect as the traditional thick rotor. However, through the dehumidification-cooling-dehumidification-cooling cycle, the desorption regeneration temperature of the rotor can be reduced to below 60°C. In this way, there is no need to use a boiler to produce hot water, and the waste heat generated by the air compressor, heat pump, etc. that originally needed to be discharged can be utilized, reducing the energy consumption of the plant.

[0005] However, the above-mentioned dehumidification-cooling-dehumidification-cooling form also has a problem, that is, the space required is extremely large. Each dehumidification or cooling requires maintenance space. As the number of sections increases, the length of the unit becomes longer, resulting in the entire air handling unit being too large, causing the unit to have high requirements for layout space. Summary of the Invention

[0006] The main purpose of the present invention is to provide an air handling unit, which aims to further reduce the size of the air handling unit by integrating the adsorption function and the desorption function in the same air handling section through a switching mechanism.

[0007] To achieve the above-mentioned objectives, the present invention proposes an air handling unit, which includes a primary filter section, a medium 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; wherein, the air handling unit also includes a switching mechanism arranged 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 of the switching mechanism has at least three air outlets, the fresh air inlet and the hot air inlet are both 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 with the fresh air inlet to form a fresh air channel, and to connect another of the three air outlets with 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] A housing, the housing being provided with an inner cavity, a hot air inlet communicating with the inner cavity, and the fresh air inlet;

[0010] a desorption hot air duct, installed in the inner cavity, one end of the desorption hot air duct being connected to the hot air inlet;

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

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

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

[0014] a stent, the stent being fixed to the inner cavity;

[0015] a communication duct, the communication duct being provided on the bracket, the communication duct having at least three sub-channels and at least three air duct openings, each of the air duct openings being connected to the other end of an outlet duct and a sub-channel; the three sub-channels being arranged at intervals along the circumference of the communication duct;

[0016] a bellows, the bellows being rotatably connected to the bracket and adjacent to the communicating duct; the bellows having a hot air inlet and a hot air outlet; the hot air inlet being communicated with the other end of the desorption hot air duct; and

[0017] A driving member is fixed to the inner cavity and is in transmission connection with the bellows, and the driving member 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.

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

[0019] And / or, the wind box includes a circular box and a fan-shaped box, the fan-shaped box is arranged on the outer wall of the circular box and is connected to 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 member is transmission-connected to the circular box.

[0020] In one embodiment, the air handling unit further includes two switching mechanisms, which are respectively located on both sides of the dehumidification section, and one end of the two switching mechanisms are respectively connected to the surface cooling and heating section and the humidification section, and the other end of the two switching mechanisms are respectively 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 up and down, and one of the partitions 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 a dehumidification surface cooling module.

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

[0023] Each of the dehumidifying 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 arranged between two adjacent moisture-absorbing layers. The moisture-absorbing layer is used to absorb moisture from the air, and the heat exchange layer is used to exchange heat with the air.

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

[0025] Each of the hygroscopic layers includes a plurality of hygroscopic strips, which are stacked along the second direction. Each of the hygroscopic strips includes a plurality of hygroscopic sheets arranged along the third direction, and the two hygroscopic sheets of two adjacent hygroscopic strips are staggered.

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

[0027] Each of the heat exchange layers comprises:

[0028] at least one medium inlet pipe, wherein the medium inlet pipe is used to introduce a heat exchange medium;

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

[0030] Multiple heat exchange tubes, both ends of which are respectively connected to the medium inlet pipe and the medium outlet pipe, and 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, and the flow channel is used for air circulation and heat exchange contact with the outer wall of the heat exchange tube.

[0031] In one embodiment, each of the heat exchange layers further comprises a plurality of heat exchange fins, each of the heat exchange fins is disposed in one of the flow channels, and each of the heat exchange fins is arranged along the extension direction of the heat exchange tube;

[0032] And / or, each of the heat exchange fins is a wavy or undulating heat exchange fin.

[0033] The air handling unit of the technical solution of the present invention includes a primary filter section, a medium 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 which are connected in sequence; wherein, the air handling unit also includes a switching mechanism arranged between the surface cooling and heating section and the dehumidification section, one end of the switching mechanism is provided with a fresh air inlet and a hot air inlet, and the other end of the switching mechanism is provided with two air outlets, the fresh air inlet and the hot air inlet are both 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 with the fresh air inlet to form a fresh air channel, and to connect the other of the two air outlets with 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, which is located between the surface cooling and heating section and the dehumidification section. A fresh air inlet and a hot air inlet are provided at one end, and two air outlets are provided at the other end. In this way, the air handling unit only needs to use the switching mechanism to switch the position where the fresh air channel and the hot air channel are connected to the dehumidification section, so that each position in the dehumidification section can alternately realize the adsorption function and the desorption function, and there is no need to set up additional desorption equipment to desorb the position where desorption is required in the dehumidification section. In this way, the entire air handling unit combines the adsorption function and the desorption function in the same air handling section of the dehumidification section by setting a switching mechanism, thereby achieving a lower desorption regeneration temperature. This temperature can be obtained through heat recovery of the refrigeration machine or heat recovery of the air compressor in the factory area, realizing energy consumption without boilers, etc., thereby further reducing the size of the air handling unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0035] Figure 1 A schematic structural diagram of an air handling unit according to an embodiment of the present invention;

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

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

[0038] Figure 4 A schematic structural diagram of a switching valve of an air handling unit provided by the present invention from one perspective;

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

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

[0041] Figure 7 An exploded diagram of the structure of the dehumidification section of the air handling unit provided by the present invention;

[0042] Figure 8 A schematic structural diagram of the moisture absorption layer of the dehumidification section of the air handling unit provided by the present invention;

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

[0044] Description of Figure Numbers:

[0045] 1. Primary filtration section; 2. Medium filtration section; 3. Surface cooling and heating section; 4. Dehumidification section; 41. Partition plate; 42. Dehumidification surface cooling module; 421. Moisture absorbing layer; 421a. Moisture absorbing sheet; 422. Heat exchange layer; 4221. Medium inlet pipe; 4222. Medium outlet pipe; 4223. Heat exchange pipe; 422a. Flow channel; 4224. Heat exchange sheet;

[0046] 5. Humidification section; 6. Fan section; 7. Chemical filtration section; 8. High-efficiency filtration 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. Bellows; 943a. Hot air inlet; 943b. Hot air outlet; 944. Driving part.

[0047] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall 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 position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The present invention provides an air handling unit.

[0052] See also Figure 1 and Figure 2 In one embodiment of the present invention, the air handling unit includes a primary filter section 1, a medium 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; wherein the air handling unit also includes a switching mechanism 9 provided 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 with the fresh air inlet 9a to form a fresh air channel, and to connect another of the three air outlets 9c with 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 primary filter section 1 is mainly used to perform preliminary filtration on the air entering the air handling unit to remove larger dust particles; the medium-efficiency filter section 2 performs deeper filtration on the air to remove fine particles; the surface cooling and heating section 3 cools or heats the air; the dehumidification section 4 is used to reduce the humidity of the air; the humidification section 5 is used to increase the humidity of the air; the fan section 6 provides the power for air flow; the chemical filtration section 7 is used to remove harmful chemicals in the air; and the high-efficiency filter section 8 performs the final filtration on the air to ensure that the output air reaches a high degree of cleanliness.

[0054] 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. Both the fresh air inlet 9a and the hot air inlet 9b are connected to the surface cooling and heating section 3, while the three air outlets 9c are connected to the dehumidification section 4.

[0055] When the first position of the dehumidification section 4 needs to dehumidify the air, the switching mechanism 9 connects one of the air outlets 9c with the fresh air inlet 9a, forming a fresh air duct. The fresh air duct is connected 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 duct, thereby achieving the dehumidification function. At the same time, when the second and third positions of the dehumidification section 4 need to dehumidify the air, the switching mechanism connects the other two air outlets 9c with the hot air inlet 9b, forming a hot air duct. The second and third positions of the dehumidification section 4 connect the hot air duct, allowing the hot air flowing out of the fresh air duct to desorb moisture from the second and third positions of the dehumidification section 4, thereby achieving the desorption function. Conversely, by alternately connecting the three air outlets 9c with the fresh air inlet 9a and the hot air inlet 9b, respectively, the switching mechanism 9 can switch to dehumidifying one of the three positions of the dehumidification section 4, while the remaining two positions of the dehumidification section 4 are used to dehumidify the fresh air.

[0056] The present invention adds a switching mechanism 9, which is located between the surface cooling and heating section 3 and the dehumidification section 4. A fresh air inlet 9a and a hot air inlet 9b are provided at one end, and three air outlets 9c are provided at the other end. In this way, the air handling unit only needs to use the switching mechanism 9 to switch the position where the fresh air channel and the hot air channel are connected to the dehumidification section 4, so that each position of the dehumidification section 4 can alternately realize the adsorption function and the desorption function, and there is no need to set up a desorption device to desorb the position where the dehumidification section 4 needs to desorb. In this way, the entire air handling unit combines the adsorption function and the desorption function in the same air handling section of the dehumidification section by setting a switching mechanism, thereby achieving a lower desorption regeneration temperature. This temperature can be obtained through heat recovery of the refrigeration machine or heat recovery of the air compressor in the plant area, realizing energy consumption without generating high-temperature hot water by a boiler, thereby further reducing the volume of the air handling unit.

[0057] In one embodiment, please refer to Figures 1 to 5 The switching mechanism 9 includes a shell 91, a desorption hot air duct 92, at least three air outlet ducts 93 and a switching valve 94. The shell 91 is provided with an inner cavity, a hot air inlet 9b and the fresh air inlet 9a connected to the inner cavity; 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 of the air outlet ducts 93 is connected to one of the air outlets 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 be connected 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, please refer to Figures 2 to 5 The switching valve 94 includes a bracket 941, a connecting pipe 942, a bellows 943 and a driving member 944. The bracket 941 is fixed to the inner cavity; the connecting pipe 942 is provided 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 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 bellows 943 is rotatably connected to the bracket 941. The frame 941 is adjacent to the connecting duct 942; 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 duct 92; the driving member 944 is fixed to the inner cavity and is in transmission connection with the bellows 943, and the driving member 944 is used to drive the bellows 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] In the initial state, the driving member 944 is not started, and the bellows 943 does not rotate relative to the connecting pipe 942. The hot air outlet 943b of the bellows 943 is connected to one of the sub-channels 942a, and the sub-channel 942a here is temporarily called the first sub-channel 942a; and the air duct opening 942b corresponding to the first sub-channel 942a and the air outlet duct are connected to the first position of the dehumidification section 4. At this time, the hot air flowing out of the bellows 943 can desorb the first position of the dehumidification section 4 connected to the first sub-channel 942a; and the hot air outlet 943b is not connected to the other two sub-channels 9 42a is connected, and the other two sub-channels 942a here are temporarily called the second sub-channel 942a and the third sub-channel 942a, and the two air duct openings 942b and the air outlet duct corresponding to the second sub-channel 942a and the third sub-channel 942a are connected with the second position and the third position of the dehumidification section 4. At this time, the fresh air entering from the fresh air inlet 9a of the outer shell 91 will directly flow through the second sub-channel 942a and the third sub-channel 942a and flow into the corresponding air outlet channel, and finally flow into the second position and the third position of the dehumidification section 4 to dehumidify the fresh air through the second position and the third position of the dehumidification section 4.

[0060] After the above initial state lasts 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 extent; at this time, the switching valve 94 of the control switching mechanism 9 is operated, and the driving member 944 drives the bellows 943 to rotate relative to the connecting pipe 942, so that the first sub-channel 942a of the connecting pipe 942 is connected to the fresh air inlet 9a of the shell 91, so that the fresh air can enter the first position of the dehumidification section 4 through the first sub-channel 942a, and the fresh air is dried by the first position of the dehumidification section 4; and 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 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] By analogy, two of the three positions of the dehumidification section 4 are connected to the fresh air inlet 9a of the outer shell 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 of the bellows 943 from the hot air outlet 943b to desorb and dry the remaining position of the dehumidification section 4.

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

[0063] Furthermore, a driver 944 is fixed to the inner cavity and is in driving connection with the bellows 943. The driver 944 is used to drive the bellows 943 to rotate, so that the hot air outlet 943b alternately communicates with one of the three sub-channels 942a, while the other two of the three sub-channels 942a communicate with the fresh air inlet 9a. This design allows for efficient switching between hot air and fresh air, ensuring an adequate supply of hot air while avoiding waste of hot air.

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

[0065] In one embodiment, please refer to Figure 4 、 Figure 5 The connecting pipe 942 is an annular pipe, and the three air duct openings 942b are located on the outer wall of the connecting pipe 942; the bellows 943 is located at the center hole of the connecting pipe 942; the bellows 943 includes a circular box and a fan-shaped box, and the fan-shaped box is arranged on the outer wall of the circular box and is connected to 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 transmission-connected to the circular box.

[0066] The bellows 943 is located at the center hole of the connecting duct 942 and comprises a circular box and a fan-shaped box. The circular box is located at the center of the bellows 943, while the fan-shaped box is located on the outer wall of the circular box and connected to the circular box. This design facilitates uniform distribution and efficient use of airflow. A hot air inlet 943a is provided at the center of the circular box. This inlet is used to introduce hot air and provide a heat source for the annular duct. The design of the hot air inlet 943a should ensure uniform distribution of the hot air and avoid local overheating or overcooling. The outer wall of the circular box is connected to the fan-shaped box, allowing the hot air to flow smoothly from the circular box to the fan-shaped box. The circumferential outer wall of the fan-shaped box is provided with a hot air outlet 943b, which is used to discharge the hot air from the fan-shaped box, achieving hot air recycling. The design of the hot air outlet 943b should take into account aerodynamic principles to ensure uniform distribution and efficient use of the hot air.

[0067] Compared to the traditional connecting duct 942, the annular duct has a larger flow cross-section, thereby reducing wind resistance and allowing the hot air to flow more smoothly. In addition, the three sub-channels 942a are evenly spaced in the connecting duct 942, so that the hot air can be more evenly distributed during the flow process, overcoming the problems of low heating efficiency and uneven heating in the prior art. 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 the hot air to form a good flow state inside the wind box 943, improving the utilization rate of the hot air.

[0068] In one embodiment, please refer to Figure 1 、 Figure 2 The air handling unit also includes two switching mechanisms 9, which are respectively located on both sides of the dehumidification section 4, and one end of the two switching mechanisms 9 is respectively connected to the surface cooling and heating section 3 and the humidification section 5, and the other end of the two switching mechanisms 9 is respectively connected to the dehumidification section 4.

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

[0070] By providing two switching mechanisms 9 on either side of the dehumidification section 4, the switching mechanisms can be switched synchronously to achieve flexible control of the air treatment process. This design greatly improves the efficiency and operational stability of the air handling unit, meeting the air treatment requirements under different operating conditions.

[0071] In one embodiment, please refer to Figures 6 to 9 The dehumidification section 4 includes at least two partitions 41 and at least three dehumidification surface cooling modules 42, wherein one of the three dehumidification surface cooling modules 42 and two of the three dehumidification surface cooling modules 42 are arranged up and down, and one of the partitions 41 is located between the two dehumidification surface cooling modules 42 below, and the other partition 41 is located between the two dehumidification surface cooling modules below and the one dehumidification surface cooling module above, and each air outlet 9c is connected to a dehumidification surface cooling module 42.

[0072] Specifically, the partition 41 is a flat plate structure whose primary function is to separate the three dehumidification surface cooling modules 42. This allows the hot air inlet and outlet of the bellows 943, controlled by the switching valve 94, to communicate with one of the three sub-channels 942a of the connecting duct 942. This allows the other two of the three air duct openings 942b of the connecting duct 942 to communicate with each of the two dehumidification surface cooling modules 42 in a one-to-one correspondence. This guides airflow through the two modules, preventing hot air and fresh air from mixing and affecting the switching mechanism 9's ability to separately operate the dehumidification mode and desorption mode for the two dehumidification surface cooling modules 42. The partition also provides thermal insulation properties, and its size and shape can be adjusted according to actual needs and installation space.

[0073] The three dehumidification surface cooling modules 42 are arranged in an up-and-down arrangement. The three dehumidification surface cooling modules 42 are defined as a first dehumidification surface cooling module 42, a second dehumidification surface cooling module 42, and a third dehumidification surface cooling module 42. The two partitions 41 are defined as a first partition 41 and a second partition 41. The first dehumidification surface cooling module 42 is located above the first partition 41, and the second and third dehumidification surface cooling modules 42 are located below the first partition 41. The second and third dehumidification surface cooling modules 42 are arranged in a left-and-right arrangement, with the second partition 41 located between the second and third dehumidification surface cooling modules 42. This up-and-down arrangement design helps improve dehumidification efficiency and makes the structure of the entire dehumidification section 4 more compact.

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

[0075] Each dehumidifier cold section is equipped with sealing plates at both ends to ensure that the cold section of the dehumidifier is in close contact with the surrounding partitions, thereby ensuring that all the air is dehumidified and cooled.

[0076] In one embodiment, please refer to Figures 6 to 9 , defining the air circulation direction of the air handling unit as a 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 arranged between two adjacent moisture absorbing layers 421; the moisture absorbing layer 421 is used to absorb moisture from the air, and the heat exchange layer 422 is used to exchange heat with the air.

[0077] In this embodiment, the moisture-absorbing layer 421 is made of a high-performance moisture-absorbing material, effectively absorbing moisture from the air. The heat exchange layer 422 is made of a highly efficient heat exchange material, rapidly exchanging heat with the air and reducing the air temperature. Air flow direction: The air flow direction is the first direction, i.e., from the inlet to the outlet.

[0078] Each dehumidifying 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 the first direction, and each heat exchange layer 422 is arranged between two adjacent moisture absorbing layers 421.

[0079] The hygroscopic layers 421 absorb moisture from the air. The three hygroscopic layers 421 are spaced apart along the first direction, ensuring sufficient contact between the air and the hygroscopic layers 421 as it passes through the dehumidifying surface cooling module 42, enhancing the dehumidification effect. This not only helps reduce air humidity but also controls air temperature. The heat exchange layer 422 exchanges heat with the air. The heat exchange layer 422 between two adjacent hygroscopic layers 421 effectively transfers heat absorbed by the hygroscopic layers 421 to the air, lowering the air temperature. This structural design facilitates both dehumidification and cooling, improving air treatment efficiency.

[0080] In one embodiment, please refer to Figures 6 to 9 , the vertical direction is defined as the second direction, the horizontal direction is defined as the third direction, and the third direction and the second direction are both arranged perpendicular to the first direction; each moisture-absorbing layer 421 includes a plurality of moisture-absorbing strips, and the plurality of moisture-absorbing strips 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, which is 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 absorbent layer 421 comprises a plurality of absorbent strips stacked vertically along a second direction. Each absorbent strip comprises a plurality of absorbent sheets 421a arranged horizontally along a third direction. This structure allows the absorbent layer 421 to not only provide vertical absorption capacity but also expand its absorption area horizontally.

[0083] Furthermore, the absorbent sheets 421a between two adjacent absorbent strips are arranged in a staggered arrangement, i.e., 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 can ensure structural stability and the tightness of the splicing position.

[0084] The hygroscopic sheet 421a is made of single hygroscopic materials with a length, width and height of 200mm×120mm×20mm.

[0085] In one embodiment, please refer to Figures 6 to 9 , the vertical direction is defined as the second direction, the horizontal direction is defined as the third direction, and the third direction and the second direction are both arranged 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 a plurality of heat exchange pipes 4223; the medium inlet pipe 4221 is used to introduce heat exchange medium; the medium outlet pipe 4222 is used to discharge heat exchange medium; both ends of the plurality of heat exchange pipes 4223 are respectively connected to the medium inlet pipe 4221 and the medium outlet pipe 4222, and the plurality of heat exchange pipes 4223 are arranged at intervals along the second direction, and a flow channel 422a is formed between two adjacent heat exchange pipes 4223, and the flow channel 422a is used for air circulation and contacts with the outer wall of the heat exchange pipe 4223 for heat exchange.

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

[0087] Multiple heat exchange tubes 4223 are arranged in a spaced-apart arrangement along the second direction, with flow channels 422a formed between adjacent heat exchange tubes 4223. Flow channels 422a allow air to circulate and exchange heat with the outer walls of the heat exchange tubes 4223. Heat exchange medium enters the heat exchange layer 422 through the medium inlet pipe 4221. The heat exchange medium flows within the heat exchange tubes 4223, exchanging heat with the air. After heat exchange, the medium exits 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 for smooth entry and exit of the heat exchange medium, significantly 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 within the system, avoiding the reduction in heat exchange efficiency caused by poor medium circulation. Furthermore, the multiple heat exchange tubes 4223 are connected to the medium inlet pipe 4221 and the medium outlet pipe 4222 at both ends, and are arranged in a spaced-apart arrangement along the second direction, forming flow channels 422a between adjacent heat exchange tubes 4223. This design allows air to flow freely through the flow channels 422a and contact the outer walls of the heat exchange tubes 4223 for heat exchange, improving the efficiency and speed of heat exchange. Furthermore, this structure also facilitates the uniform distribution of the heat exchange medium, avoiding the reduction in heat exchange efficiency caused by uneven medium distribution.

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

[0090] The two lower dehumidification surface cooling modules 42 are each connected to the heat exchange tubes 4223 of the two lower dehumidification surface cooling modules 42 via a separate medium inlet pipe 4221. Each dehumidification surface cooling module 42 is also connected to the heat exchange tubes 4223 of the two lower dehumidification surface cooling modules 42 via a separate medium outlet pipe 4222. The medium inlet pipe 4221 is located below the dehumidification surface cooling module 42 and connects the heat exchange tubes 4223 of the dehumidification surface cooling module 42 at the bottom. The medium outlet pipe 4222 is located above the dehumidification surface cooling module 42 and connects the heat exchange tubes 4223 of the dehumidification surface cooling module 42 at the top.

[0091] In one embodiment, please refer to Figures 6 to 9 Each heat exchange layer 422 further includes a plurality of heat exchange fins 4224 , each heat exchange fin 4224 is disposed in a flow channel 422a , and each heat exchange fin is arranged along the extension direction of the heat exchange tube 4223 ; each heat exchange fin 4224 is a wavy or undulating heat exchange fin 4224 .

[0092] The heat exchange layer 422 in this embodiment is composed of a plurality of heat exchange fins 4224. The number of heat exchange fins 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 fin 4224 is arranged in a flow channel 422a and arranged along the extension direction of the heat exchange tube 4223. The heat exchange fins 4224 are preferably wavy or undulating. This shape is conducive to increasing the contact area between the fluid and the heat exchange fins 4224, thereby improving the heat exchange efficiency. The material of the heat exchange fins 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 fins 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 main component of the heat exchanger, and is used to support the heat exchange layer 422 and the heat exchange plate 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 fins 4224, which are arranged in a primary flow channel 422a and along the extension direction of the heat exchange tubes 4223. This structural design optimizes the spatial layout of the heat exchange fins 4224, allowing for more even distribution of fluid as it flows through the heat exchange layer 422, thereby improving heat exchange efficiency. Compared to existing technologies, 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 has a wavy or undulating structure. This unique design increases the surface area of the fins 4224, thereby increasing the heat exchange area and making the heat exchange process more efficient. The wavy or undulating fins 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 transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An air handling unit, characterized in that: The air handling unit comprises a primary filter section, a medium 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 which are connected in sequence; wherein, the air handling unit further comprises a switching mechanism arranged between the surface cooling and heating section and the dehumidification section, one end of the switching mechanism is provided with a fresh air inlet and a hot air inlet, and the other end of the switching mechanism is provided with at least three air outlets, the fresh air inlet and the hot air inlet are both connected with the surface cooling and heating section, and the three air outlets are respectively connected with the dehumidification section; the switching mechanism is used to connect two of the three air outlets with the fresh air inlet to form a fresh air channel, and to connect another of the three air outlets with the hot air inlet to form a hot air channel, so that the fresh air channel and the hot air channel are alternately connected with different positions of the dehumidification section; The switching mechanism includes: A housing, wherein the housing is provided with an inner cavity, the hot air inlet and the fresh air inlet communicated with the inner cavity; a desorption hot air duct, installed in the inner cavity, one end of the desorption hot air duct being connected to the hot air inlet; at least three air outlet ducts, one end of each of the air outlet ducts being connected to one of the air outlets; and a switching valve, one end of which is connected to the other end of the desorption hot air duct, and the other ends of the three outlet ducts are respectively connected to the other end of the switching valve, and the switching valve is used to alternately switch the desorption hot air duct to be connected to one of the three outlet ducts, so that the other two of the three outlet ducts are respectively connected to the fresh air inlet; The switching valve comprises: a stent, the stent being fixed to the inner cavity; a communication duct, the communication duct being provided on the bracket, the communication duct having at least three sub-channels and at least three air duct openings, each of the air duct openings being connected to the other end of an outlet duct and a sub-channel; the three sub-channels being arranged at intervals along the circumference of the communication duct; a bellows, the bellows being rotatably connected to the bracket and adjacent to the communicating duct; the bellows having a hot air inlet and a hot air outlet; the hot air inlet being communicated with the other end of the desorption hot air duct; and a driving member fixed to the inner cavity and in driving connection with the bellows, the driving member being 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 communicating pipe is an annular pipe, and the three air duct openings are located on the outer wall of the communicating pipe; the bellows is located at the center hole of the communicating pipe; And / or, the wind box includes a circular box and a fan-shaped box, the fan-shaped box is arranged on the outer wall of the circular box and is connected to 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 member is transmission-connected to the circular box.

2. The air handling unit according to claim 1, wherein: The air handling unit also includes two switching mechanisms, which are respectively located on both sides of the dehumidification section, and one end of the two switching mechanisms is respectively connected to the surface cooling and heating section and the humidification section, and the other end of the two switching mechanisms is respectively connected to the dehumidification section.

3. The air handling unit according to claim 1, wherein: 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 up and down, and one of the partitions 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 a dehumidification surface cooling module.

4. The air handling unit according to claim 3, wherein: defining an air flow direction of the air handling unit as a first direction; Each of the dehumidifying 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 arranged between two adjacent moisture-absorbing layers. The moisture-absorbing layer is used to absorb moisture from the air, and the heat exchange layer is used to exchange heat with the air.

5. The air handling unit according to claim 4, wherein: defining a vertical direction as a second direction, defining a horizontal direction as a third direction, and both the third direction and the second direction are arranged perpendicular to the first direction; Each of the hygroscopic layers includes a plurality of hygroscopic strips, which are stacked along the second direction. Each of the hygroscopic strips includes a plurality of hygroscopic sheets arranged along the third direction, and the two hygroscopic sheets of two adjacent hygroscopic strips are staggered.

6. The air handling unit according to claim 5, wherein: defining a vertical direction as a second direction, defining a horizontal direction as a third direction, and both the third direction and the second direction are arranged perpendicular to the first direction; Each of the heat exchange layers comprises: at least one medium inlet pipe, wherein the medium inlet pipe is used to introduce a heat exchange medium; at least one medium discharge pipe, the medium discharge pipe being used to discharge the heat exchange medium; and Multiple heat exchange tubes, both ends of which are respectively connected to the medium inlet pipe and the medium outlet pipe, and 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, and the flow channel is used for air circulation and heat exchange contact with the outer wall of the heat exchange tube.

7. The air handling unit according to claim 6, wherein: Each of the heat exchange layers further comprises a plurality of heat exchange fins, each of the heat exchange fins is disposed in one of the flow channels, and each of the heat exchange fins is arranged along the extension direction of the heat exchange tube; And / or, each of the heat exchange fins is a wavy or undulating heat exchange fin.

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