Air handling unit

Abstract

The invention discloses an air handling unit, and relates to the technical field of air handling equipment, the air handling unit comprises a primary efficiency 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 which are communicated in sequence; the air handling unit further comprises a switching mechanism arranged between the surface cooling heating section and the dehumidification section, one end of the switching mechanism is provided with a fresh air inlet and a hot air inlet, the other end of the switching mechanism is provided with three air outlets communicated with the dehumidification section, and the fresh air inlet and the hot air inlet are both communicated with the surface cooling heating section. And the switching mechanism is used for communicating two of the three air outlets with the fresh air inlet to form a fresh air channel and communicating the other one 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 alternately communicate with different positions of the dehumidification section. The adsorption function and the desorption function are integrated in the same air treatment section, and the size of the air treatment unit is further reduced.

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] The rotary dehumidifier is a highly efficient air treatment equipment. The core component of this equipment is the dehumidification wheel, which is made of special materials and has a strong moisture absorption capacity. The working principle of the rotary dehumidifier is to use the moisture absorption properties of the adsorption material to achieve the adsorption and desorption of moisture in the air through the rotation of the wheel. This equipment is not affected by the ambient temperature and can maintain a good dehumidification effect even under low temperature conditions. Therefore, it is particularly suitable for low temperature and low humidity conditions.

[0003] Rotary dehumidification is an isenthalpic process that will reduce the humidity of the air, but it will cause the temperature to rise. Traditional dehumidification with a thick rotary wheel, because the lower the air temperature treated by the rotary wheel, the better the dehumidification effect of the rotary wheel. In order to reduce the dehumidification burden of the rotary wheel, it is necessary to pass medium-temperature chilled water of about 12°C in front of the rotary wheel, and enter the rotary dehumidification after cooling. Since the temperature will rise after the rotary dehumidification, it is necessary to set a cooling surface cooling coil behind the rotary wheel to cool it down, and then send it into the room. This type of rotary wheel requires hot water or steam above 80 degrees Celsius to desorb and regenerate. The condensers of air compressors, heat pumps, and chillers in industrial buildings will generate a lot of heat, but this heat can only produce hot water at 40-60°C. Therefore, in order to obtain hot water above 80°C, traditional rotary wheels can only be produced through boilers. The heating efficiency of boilers is very low and will waste a lot of energy.

[0004] Based on the above problems, we found through experiments that the originally thick rotor can be cut into multiple thin rotors (the total thickness is the same as the thickness of the original single thick rotor) and the temperature can be cooled between two wheels. This structure has the same dehumidification effect as the traditional thick rotor, but through the dehumidification-cooling-dehumidification-cooling cycle structure, 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 to reduce the energy consumption of the plant.

[0005] However, the above dehumidification-cooling-dehumidification-cooling form also has a problem, that is, the space required is particularly 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, resulting in high requirements for the layout site of the unit. 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 volume 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 purpose, the present invention provides 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 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 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 is used 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 comprises:

[0009] A shell, wherein the shell is provided with an inner cavity, a hot air inlet communicated with the inner cavity, and the 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 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 air 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 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 comprises:

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

[0015] A communication pipe, the communication pipe is arranged on the bracket, the communication pipe has at least three sub-channels and at least three air duct openings, each of the air duct openings is connected with the other end of one of the air outlet pipes and one of the sub-channels; the three sub-channels are arranged at intervals along the circumference of the communication pipe;

[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 drivingly connected to 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 also 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 hygroscopic layers and at least two heat exchange layers. The three hygroscopic layers are arranged at intervals along the first direction, and each heat exchange layer is arranged between two adjacent hygroscopic layers. The hygroscopic 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 comprises a plurality of hygroscopic strips, which are stacked along the second direction, and each of the hygroscopic strips comprises a plurality of hygroscopic sheets arranged along the third direction, and the two hygroscopic sheets of two adjacent hygroscopic strips are arranged in a staggered manner.

[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] A plurality of heat exchange tubes, both ends of which are respectively connected to the medium inlet tube and the medium outlet tube, the plurality of 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 contacts with the outer wall of the heat exchange tube for heat exchange.

[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 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 also 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, 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 with the surface cooling and heating section, and the two air outlets are respectively connected with 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 is used 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 with 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 can switch the position where the fresh air channel and the hot air channel are connected to the dehumidification section only by using the switching mechanism, so that each position of the dehumidification section can alternately realize the adsorption function and the desorption function, and there is no need to set up a separate 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 the air compressor in the factory area, thereby achieving 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 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 an 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 structural schematic diagram of a dehumidification section of an air handling unit provided by the present invention from one perspective;

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

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

[0043] Fig. 9 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 filter section; 2. Medium filter section; 3. Surface cooling and heating section; 4. Dehumidification section; 41. Partition plate; 42. Dehumidification surface cooling module; 421. Moisture absorption layer; 421a. Moisture absorption 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 realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work 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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication 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 used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the 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 contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0051] The 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 which are connected in sequence; wherein the air handling unit also includes a switching mechanism 9 arranged 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 for preliminary filtration of the air entering the air handling unit to remove larger dust particles; the medium-efficiency filter section 2 performs a 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 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 of the air to ensure that the output air reaches a high degree of cleanliness.

[0054] In addition, the air handling unit further includes a switching mechanism 9 disposed between the surface cooling and heating section 3 and the dehumidification section 4. The switching mechanism 9 has a fresh air inlet 9a and a hot air inlet 9b at one end, and three air outlets 9c at the other end. 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 needs to dehumidify the air, the switching mechanism 9 connects one of the air outlets 9c with the fresh air inlet 9a to form a fresh air channel, and the fresh air channel is connected to the first position of the dehumidification section 4, so that the first position of the dehumidification section 4 can dehumidify the fresh air flowing in the fresh air channel to achieve the dehumidification function; at the same time, when the second position and the third position of the dehumidification section 4 need to desorb moisture, the switching structure connects the other two air outlets 9c with the hot air inlet 9b to form a hot air channel, so that the second position and the third position of the dehumidification section 4 can connect the hot air channel, so that the hot air flowing out of the fresh air channel can desorb moisture from the second position and the third position of the dehumidification section 4 to achieve the desorption function. On the contrary, by alternately connecting the three air outlets 9c with the fresh air inlet 9a and the hot air inlet 9b respectively through the switching mechanism 9, one of the three positions of the dehumidification section 4 can be switched to desorb moisture, and the remaining two positions of the three 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 can switch the position where the fresh air channel and the hot air channel are connected to the dehumidification section 4 only by using the switching mechanism 9, 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. The temperature can be obtained through heat recovery of the refrigeration machine or heat recovery of the air compressor in the plant area, thereby achieving energy consumption without generating high-temperature hot water from a boiler, thereby further reducing the size 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 a 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 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 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 arranged 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 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 transmission-connected to 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 is connected to the first position of the dehumidification section 4, and 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 channels, and finally flow into the second position and the third position of the dehumidification section 4, so as 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 is desorbed and dried, while the second position and the third position 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 with 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 absorbed and dried by the first position of the dehumidification section 4; and the connecting pipe The second sub-channel 942a of 942 is connected with the hot air outlet 943b of the bellows 943, so that the hot air of 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 with 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] The bellows 943 is rotatably connected to the bracket 941 and is adjacent to the connecting pipe 942. Such a layout enables the bellows 943 to work 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 the heat energy.

[0063] In addition, the driving member 944 is fixed to the inner cavity and is in driving connection with the bellows 943. 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 connected to the fresh air inlet 9a. This design enables the hot air and fresh air to be effectively switched, which not only ensures the sufficient supply of hot air, but also avoids the 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 arranged 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, 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, 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 drivingly connected to the circular box.

[0066] The wind box 943 is located at the center hole position of the connecting pipe 942, and its structure includes a circular box and a fan-shaped box. The circular box is located at the center part of the wind box 943, and the fan-shaped box is arranged on the outer wall of the circular box and is connected to the circular box. This design is conducive to the uniform distribution and efficient use of airflow. A hot air inlet 943a is provided at the center position of the circular box, and the air inlet 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 the uniform distribution of hot air and avoid local overheating or overcooling. The outer wall of the circular box is connected to the fan-shaped box, so that the hot air can 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 guide the hot air out of the fan-shaped box to realize the recycling of hot air. The design of the hot air outlet 943b should take into account the principles of aerodynamics to ensure the uniform distribution and efficient use of hot air.

[0067] Compared with the traditional connecting pipe 942, the flow cross-section of the annular pipe is larger, thereby reducing wind resistance and allowing hot air to flow more smoothly. In addition, the three sub-channels 942a are evenly spaced in the connecting pipe 942, so that the hot air can be more evenly distributed during the flow process, overcoming the problems caused by 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, thereby 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 setting of the two switching mechanisms 9 makes the air treatment process more flexible and can be switched according to actual needs, thereby 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 respectively, ensuring the continuity and stability of the air during the treatment process.

[0070] By setting two switching mechanisms 9, located on both sides of the dehumidification section 4, the flexible regulation of the air treatment process is achieved through synchronous position switching of the switching mechanisms. This design greatly improves the working efficiency and operation stability of the air handling unit and meets the requirements for air treatment under different working 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 at the bottom, and the other partition 41 is located between the two dehumidification surface cooling modules at the bottom and a dehumidification surface cooling module at the top, and 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, so that the hot air inlet and outlet of the air box 943 controlled by the switching valve 94 is connected to one of the three sub-channels 942a of the connecting pipe 942, so that the other two of the three air duct openings 942b of the connecting pipe 942 are connected to the two dehumidification surface cooling modules 42 one by one, and guide the air flow to flow in the two modules respectively, so as to avoid the hot air and the fresh air from mixing together, and affect the switching mechanism 9 to respectively perform the dehumidification mode and the desorption mode on the two dehumidification surface cooling modules 42. At the same time, the partition has heat insulation performance, and the size and shape of the partition 41 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, and 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 dehumidification surface cooling module 42 and the third dehumidification surface cooling module 42 are located below the first partition 41. The second dehumidification surface cooling module 42 and the third dehumidification surface cooling module 42 are arranged left and right, and the second partition 41 is located between the second dehumidification surface cooling module 42 and the third dehumidification surface cooling module 42. This up-and-down arrangement design helps to improve the 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 hygroscopic layers 421 and at least two heat exchange layers 422, the three hygroscopic layers 421 are arranged at intervals along the first direction, and each heat exchange layer 422 is arranged between two adjacent hygroscopic layers 421; the hygroscopic 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 absorption layer 421 uses high-performance moisture absorption materials, which can effectively absorb moisture in the air. The heat exchange layer 422 uses efficient heat exchange materials, which can quickly exchange heat with the air and reduce the air temperature. Air circulation direction: The air circulation direction is the first direction, that is, the direction 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 layer 421 is used to absorb moisture in the air. The three hygroscopic layers 421 are arranged at intervals along the first direction, so that when the air passes through the dehumidification surface cooling module 42, it can fully contact the hygroscopic layer 421, thereby improving the dehumidification effect. This not only helps to reduce the humidity of the air, but also controls the air temperature. The heat exchange layer 422 is used to exchange heat with the air. The heat exchange layer 422 between two adjacent hygroscopic layers 421 can effectively transfer the heat adsorbed on the hygroscopic layer 421 to the air, thereby reducing the air temperature. This structural design helps to achieve the dehumidification and cooling functions of the air and improve the air treatment effect.

[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 hygroscopic layer 421 includes a plurality of hygroscopic strips, and the plurality of hygroscopic strips are stacked along the second direction, and each hygroscopic strip includes a plurality of hygroscopic sheets 421a arranged along the third direction, and the two hygroscopic sheets 421a of two adjacent hygroscopic 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 hygroscopic layer 421 includes a plurality of hygroscopic strips, which are stacked in the second direction, i.e., stacked in the vertical direction. Each hygroscopic strip is composed of a plurality of hygroscopic sheets 421a arranged in the third direction, i.e., arranged in the horizontal direction. This structure enables the hygroscopic layer 421 to not only provide hygroscopic capacity in the vertical direction, but also expand the hygroscopic area in the horizontal direction.

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

[0084] The hygroscopic sheet 421a is formed by splicing together a single hygroscopic material 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 the 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, which is arranged at the bottom or side of the heat exchanger. At least one medium outlet pipe 4222 is used to discharge heat exchange medium, which is arranged at the top or side of the heat exchanger. The number of multiple heat exchange pipes 4223 is determined according to the design requirements of the heat exchanger, and both ends of the multiple heat exchange pipes 4223 are connected to the medium inlet pipe 4221 and the medium outlet pipe 4222 respectively.

[0087] A plurality of 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 for air circulation and for heat exchange in contact with the outer wall of the heat exchange tube 4223. The heat exchange medium enters the heat exchange layer 422 through the medium inlet pipe 4221. The heat exchange medium flows in the heat exchange tube 4223 and exchanges heat with the air. The medium after heat exchange 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 a plurality of heat exchange pipes 4223. This structural design enables the heat exchange medium to enter and discharge 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 the reduction of heat exchange efficiency due to poor medium circulation. Furthermore, the two 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 are arranged at intervals along the second direction, and a flow channel 422a is formed between two adjacent heat exchange pipes 4223. This design enables air to flow freely in the flow channel 422a and contact the outer wall of the heat exchange pipe 4223 for heat exchange, thereby improving the efficiency and speed of heat exchange. At the same time, this structure is also conducive to the uniform distribution of the heat exchange medium, avoiding the reduction of heat exchange efficiency due to uneven medium distribution.

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

[0090] The two lower dehumidification surface cooling modules 42, each dehumidification surface cooling module 42 is connected to the heat exchange tubes 4223 of the two lower dehumidification surface cooling modules 42 through a medium inlet pipe 4221; each dehumidification surface cooling module 42 is connected to the heat exchange tubes 4223 of the two lower dehumidification surface cooling modules 42 through a medium outlet pipe 4222. The medium inlet pipe 4221 is located below the dehumidification surface cooling module 42 and enters, 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 of the dehumidification surface cooling module 42.

[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, and 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 fin 4224 is preferably wavy or undulating, which is conducive to increasing the contact area between the fluid and the heat exchange fin 4224, thereby improving the heat exchange efficiency. The material of the heat exchange fin 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 fin 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 a plurality of heat exchange fins 4224, which are arranged 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 fins 4224, so that the fluid can be more evenly distributed when flowing through the heat exchange layer 422, thereby improving the 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 exchanger 4224 adopts a wavy or undulating structure. This unique design increases the surface area of ​​the heat exchanger 4224, thereby increasing the heat exchange area, making the heat exchange process more sufficient. The wavy or undulating heat exchanger 4224 can better capture and transfer heat energy, effectively improve the heat exchange efficiency, and reduce heat loss.

[0095] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air handling unit, characterized in that: 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 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 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 is used 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.

2. The air handling unit according to claim 1, characterized in that: The switching mechanism comprises: A shell, wherein the shell 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 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 of the air outlet ducts being connected to one of the air outlets; and 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 air 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 air outlet ducts, so that the other two of the three air outlet ducts are respectively connected to the fresh air inlet.

3. The air handling unit according to claim 2, characterized in that: The switching valve comprises: a stent, the stent being fixed to the inner cavity; A communication pipe, the communication pipe is arranged on the bracket, the communication pipe has at least three sub-channels and at least three air duct openings, each of the air duct openings is connected with the other end of one of the air outlet pipes and one of the sub-channels; the three sub-channels are arranged at intervals along the circumference of the communication pipe; 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 is fixed to the inner cavity and is drivingly connected to 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.

4. The air handling unit according to claim 3, characterized in that: The communicating pipe is an annular pipe, and the three air duct openings are located on the outer wall of the communicating pipe; the wind box is located at the central 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.

5. The air handling unit according to claim 1, characterized in that: 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.

6. The air handling unit according to 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 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.

7. The air handling unit according to claim 6, characterized in that: defining the air flow direction of the air handling unit as a first direction; Each of the dehumidifying surface cooling modules includes at least three hygroscopic layers and at least two heat exchange layers. The three hygroscopic layers are arranged at intervals along the first direction, and each heat exchange layer is arranged between two adjacent hygroscopic layers. The hygroscopic layer is used to absorb moisture from the air, and the heat exchange layer is used to exchange heat with the air.

8. The air handling unit according to claim 7, characterized in that: A vertical direction is defined as a second direction, and a horizontal direction is defined as a third direction, and the third direction and the second direction are both arranged perpendicular to the first direction; Each of the hygroscopic layers comprises a plurality of hygroscopic strips, which are stacked along the second direction, and each of the hygroscopic strips comprises a plurality of hygroscopic sheets arranged along the third direction, and the two hygroscopic sheets of two adjacent hygroscopic strips are arranged in a staggered manner.

9. The air handling unit according to claim 7, characterized in that: A vertical direction is defined as a second direction, and a horizontal direction is defined as a third direction, and the third direction and the second direction are both 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 A plurality of heat exchange tubes, both ends of which are respectively connected to the medium inlet tube and the medium outlet tube, the plurality of 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 contacts with the outer wall of the heat exchange tube for heat exchange.

10. The air handling unit according to claim 9, characterized in that: 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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