Combined direct evaporative cooling air conditioning unit

Abstract

The application discloses a combined direct evaporative cooling air conditioning unit, and relates to the technical field of air conditioners, comprising a filtering assembly, which utilizes a natural cold source, reduces the dependence on traditional refrigerants, and is beneficial to energy saving and emission reduction. Meanwhile, compared with indirect evaporative cooling, the direct evaporative cooling technology has higher energy efficiency, fresh air, return air and exhaust air electric valves can be adjusted according to outdoor temperature and air humidity, various operation modes can be realized, the demand of different seasons can be met, the filtering assembly adopts multiple layers of glass fiber paper and receiving plates, the air filtering effect is improved, the air can pass through more levels of filtering before entering the data center, when the dust attached to the filtering assembly reaches a certain degree, the fixed frame will automatically fall, the filtering piece is conveniently replaced, manual intervention is not needed, manpower cost is saved, the replacement of the filtering piece is completed when the preset dust amount is reached, the staff is prevented from forgetting to overhaul the air duct, the normal operation of the air conditioning system is ensured, the technology is mature and reliable, and has a wide application basis.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, specifically to a combined direct evaporative cooling air conditioning unit. Background Technology

[0002] In recent years, my country's data centers have experienced rapid growth in scale and power density, resulting in increasing heat generation and the need for uninterrupted cooling throughout the year. This has led to a rapid increase in the electricity consumption of air conditioning equipment in data centers, making energy conservation a pressing issue. Reducing the energy consumption of air conditioning systems is key to achieving green and sustainable development of data centers. Evaporative cooling air conditioning technology utilizes dry air energy to obtain the required cooling capacity. In the relatively dry northwest and northern regions of my country, where the calculated wet-bulb temperature of outdoor air is low and the diurnal temperature range of dry-bulb temperature is large in summer, evaporative cooling technology can be fully utilized for natural cooling, reducing electricity consumption and demonstrating significant energy-saving effects. Furthermore, the increasing number of cloud computing data centers, compared to internet data centers, offers more flexible temperature and humidity requirements and higher temperature and humidity compatibility, providing a foundation for the widespread use of evaporative cooling air conditioning units and making evaporative cooling technology a promising area for application in data centers.

[0003] The following problems exist in the existing technology:

[0004] Under current technology, the heat exchange efficiency of indirect evaporative cooling is generally 50%–80%, while that of direct evaporative cooling is generally 70%–90%. It is evident that direct evaporative cooling is more efficient. Furthermore, it has a smaller temperature difference and a longer natural cooling time, resulting in better energy savings. The rational use of direct evaporative cooling air conditioning units has considerable economic and social benefits and is also conducive to energy conservation and emission reduction. Addressing the increasing cooling demand of data centers while societal requirements for energy conservation and emission reduction are becoming increasingly stringent, we propose a combined direct evaporative cooling air conditioning unit for cloud computing data centers. This unit fully utilizes dry air energy, saving energy and reducing consumption while ensuring the cooling needs of data centers. Therefore, we propose a combined direct evaporative cooling air conditioning unit to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a combined direct evaporative cooling air conditioning unit to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] This invention provides a combined direct evaporative cooling air conditioning unit, comprising a mixing section, which includes a fresh air electric valve, a return air electric valve, and an exhaust air electric valve. The return air electric valve and the exhaust air electric valve are located on top of the fresh air electric valve. A filter section is provided on one side of the mixing section, which includes a pre-filter located on the side of the fresh air electric valve near the filter section and connected to the fresh air electric valve. A medium-efficiency filter is provided on the side of the pre-filter away from the fresh air electric valve. A direct evaporative cooling section is provided on the side of the filter section away from the mixing section, which includes a baffle plate and a water pump. A supplementary cooling section is provided on the side of the direct evaporative cooling section away from the filter section, which includes an evaporator. Air passing through the fresh air electric valve mixes with the air produced by the evaporator after passing through the pre-filter and the medium-efficiency filter. An air supply section is provided on the side of the supplementary cooling section away from the direct evaporative cooling section, which includes an air supply fan and a return air fan. The return air fan returns the return air to the mixing section through the return air electric valve and the exhaust air electric valve.

[0008] Preferably, the primary filter includes a ventilation duct for external air to enter the data center. The top of the ventilation duct is fixedly connected to an installation channel for fixing multiple components. The installation channel has a built-in filter component for preliminary filtration of external air. The inner wall of the installation channel is provided with a connecting component for stabilizing the filter component. The filter component is fixed to the installation channel through the connecting component.

[0009] Preferably, the top of the installation channel has a connecting window for the filter assembly to pass through, and the sides of the installation channel have air supply windows for communicating with the ventilation duct. The filter assembly is placed inside the air supply window and the air supply window is completely closed. The inner walls of the connecting window have guide grooves on both sides to facilitate the movement of the filter assembly. The guide grooves on both sides are symmetrically distributed along the axis of the installation channel. The inner walls of the connecting window have mounting grooves on both sides for installing connecting components. The mounting grooves on both sides are symmetrically distributed along the axis of the installation channel.

[0010] Preferably, the filter assembly includes a fixing frame for fixing multiple parts. The fixing frame is placed inside a communicating window and slidably connected to the inner wall of the communicating window. The fixing frame is built into multiple layers of glass fiber paper for filtering air impurities. Multiple receiving plates for accumulating dust are fixedly connected to the inner wall of the fixing frame. The side of the receiving plate near the fixing frame contacts the glass fiber paper. The multiple receiving plates are evenly distributed along the height direction of the fixing frame. A support plate for contacting other filter assemblies is fixedly connected to one side of the top of the fixing frame. The surface of the support plate has a communicating hole for easy carrying by the user.

[0011] Preferably, the top of the fixed frame is fixedly connected with a plurality of fixed rollers for stabilizing the other filter components. The fixed rollers are evenly distributed along the width direction of the fixed frame. The bottom of the fixed frame is provided with a plurality of fixed holes that match the fixed rollers. The fixed rollers and the fixed holes are provided with triggering inclined surfaces at their respective ends to facilitate contact between them. The fixed rollers are slidably connected to the wall of the fixed holes.

[0012] Preferably, multiple connecting seats for mounting guide wheels are fixedly connected to both sides of the fixed frame. The multiple connecting seats are evenly distributed along the height direction of the fixed frame. A connecting groove for mounting a rotating rod is opened at the end of the connecting seat away from the fixed frame. The rotating rod extends through the groove wall to the outside.

[0013] Preferably, the rotating rod is rotatably connected to the connecting seat, and a guide wheel for contacting the inner wall of the guide groove is sleeved on the surface of the rotating rod. The guide wheel is fixedly connected to the rotating rod, and the guide wheel is placed in the mounting groove and slidably connected to the groove wall. The side of the guide wheel away from the fixed frame contacts the groove wall.

[0014] Preferably, mounting seats for cooperating with connecting components are fixedly connected to both sides of the fixed frame. The mounting seats on both sides are symmetrically distributed along the axis of the fixed frame. A hanging plate for stabilizing the overall filter assembly is fixedly connected to the end of the mounting seat away from the fixed frame. The connecting component includes a fixing groove for installing multiple parts.

[0015] Preferably, the fixing groove is formed on both sides of the mounting groove wall, and the mounting grooves on both sides are symmetrically distributed along the axis of the hanging plate. The bottom of the inner cavity of the mounting groove is rotatably connected to the mounting roller for connecting the fixing seat. The two ends of the surface of the mounting roller are sleeved with coil springs for driving the fixing seat to move, and the coil springs are placed in the fixing groove.

[0016] Preferably, one end of the coil spring is fixedly connected to the wall of the fixing groove, the other end of the coil spring is fixedly connected to the surface of the mounting roller, the fixing seat is sleeved on the surface of the mounting roller and fixedly connected thereto, and a top seat for supporting the filter assembly is fixedly connected to the side of the fixing seat away from the installation channel, and the upper end surface of the top seat contacts and slides with the lower end surface of the hanging plate.

[0017] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects:

[0018] This invention utilizes natural cold sources, reducing reliance on traditional refrigerants and promoting energy conservation and emission reduction. Furthermore, direct evaporative cooling technology is more energy efficient than indirect evaporative cooling. The electric valves for fresh air, return air, and exhaust air can be adjusted according to outdoor temperature and humidity, enabling multiple operating modes to meet the needs of different seasons. The filter components employ multi-layered fiberglass paper and a support plate to improve air filtration, ensuring the air undergoes multiple layers of filtration before entering the data center, thus enhancing airtightness. When the dust adhering to the filter components reaches a certain level, their fixing frame automatically drops, facilitating filter replacement without manual intervention, saving labor costs. Pre-setting dust levels for filter replacement prevents staff from forgetting to inspect ventilation ducts, ensuring the normal operation of the air conditioning system. The involved technologies are mature and reliable, with a broad application base, and are suitable for various scenarios. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This is a schematic diagram of the direct evaporative cooling air conditioning unit of the present invention;

[0021] Figure 2 This is a schematic diagram of the primary filter structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the primary filter of the present invention;

[0023] Figure 4 This is a schematic diagram of the installation tunnel structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection component structure of the present invention;

[0025] Figure 6 This is the invention Figure 2 Enlarged structural diagram at point A in the middle;

[0026] Figure 7 This is a schematic diagram of the filter component structure of the present invention;

[0027] Figure 8 This is a schematic diagram of the assembly structure of the fixed roller and the fixed frame of the present invention;

[0028] Figure 9 This is the invention Figure 7 Enlarged structural diagram at point B.

[0029] In the picture:

[0030] 1. Ventilation duct; 101. Installation passageway; 102. Connecting window; 104. Air supply window; 105. Guide groove; 106. Mounting groove; 2. Filter assembly; 201. Fixing frame; 202. Fiberglass paper; 203. Support plate; 204. Support plate; 205. Connecting hole; 206. Fixing roller; 207. Fixing hole; 208. Mounting seat; 209. Rotating rod; 210. Guide wheel; 211. Connecting seat; 212. Hanging plate; 213. Connecting groove; 214. 1. Triggering ramp; 3. Connecting assembly; 301. Fixing groove; 302. Mounting roller; 303. Coil spring; 304. Fixing seat; 305. Top seat; 4. Mixing section; 5. Filtering section; 6. Direct evaporation cooling section; 7. Cooling replenishment section; 8. Air supply section; 9. Fresh air electric valve; 10. Primary filter; 11. Return air electric valve; 13. Exhaust air electric valve; 14. Water baffle; 15. Water pump; 16. Evaporator; 17. Return air fan; 18. Air supply fan; 19. Medium-efficiency filter. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] Please see Figures 1-9This invention provides a combined direct evaporative cooling air conditioning unit, including a mixing section 4, which includes a fresh air electric valve 9, a return air electric valve 11, and an exhaust air electric valve 13. The return air electric valve 11 and the exhaust air electric valve 13 are located on top of the fresh air electric valve 9. A filter section 5 is provided on one side of the mixing section 4, including a pre-filter 10, which is located on the side of the fresh air electric valve 9 near the filter section 5 and is connected to the fresh air electric valve 9. A medium-efficiency filter 19 is provided on the side of the pre-filter 10 away from the fresh air electric valve 9. A direct evaporative cooling section 6 is provided on the side of the filter section 5 away from the mixing section 4, including a baffle plate 14 and a water pump 15. A supplementary cooling section 7 is provided on the side of the direct evaporative cooling section 6 away from the filter section 5, including an evaporator 16. The air passing through the fresh air electric valve 9 passes through the pre-filter 10 and the medium-efficiency filter 19 and then reacts with the air generated by the evaporator 16. The air produced is mixed, and the cooling section 7 is located on the side away from the direct evaporation cooling section 6. The air supply section 8 includes a supply fan 18 and a return fan 17. The return fan 17 returns the return air to the mixing section 4 through the return air electric valve 11 and the exhaust air electric valve 13. When the outdoor temperature is low, the fresh air, return air and exhaust air electric valves 3 are adjusted and operated to mix the outdoor fresh air and return air and use natural cold source for cooling. When the outdoor air humidity meets the indoor air humidity requirements, the outdoor fresh air and return air are directly mixed and supplied. When the outdoor air humidity is lower than the indoor air humidity requirements, the direct evaporation section spray humidification is turned on at the same time. When the outdoor air humidity is higher than the indoor air humidity requirements, the DX direct expansion system dehumidification is turned on at the same time. When the outdoor temperature is high, the fresh air and exhaust air electric valves 3 are opened and the return air electric valve 11 is closed, and the unit is switched to 100% fresh air mode. When the outdoor air humidity is lower than the indoor air humidity requirements, the outdoor fresh air and direct evaporation cooling are used for cooling. If direct evaporative cooling still cannot meet the supply air temperature requirements, the DX direct expansion refrigeration system will be activated for supplemental cooling. In areas with low outdoor wet-bulb temperatures, the DX refrigeration system does not need to be activated. When outdoor air humidity is higher than the required indoor air humidity, the DX direct expansion system will be activated for cooling and dehumidification. When severe outdoor environmental pollution occurs, the fresh air and exhaust electric valves 3 will be closed, and the return air electric valve 11 will be opened. The unit will then operate in return air mode, utilizing the DX direct expansion system for cooling.

[0033] To reduce labor costs, an automatically replaceable air filter is included. The primary filter 10 contains a ventilation duct 1 for external air to enter the data center. A mounting channel 101 for securing multiple components is fixedly connected to the top of the ventilation duct 1. The mounting channel 101 houses a filter assembly 2 for preliminary filtration of external air. A connecting component 3 for stabilizing the filter assembly 2 is located on the inner wall of the mounting channel 101. The filter assembly 2 is fixed to the mounting channel 101 via the connecting component 3. A connecting window 102 for the filter assembly 2 to pass through is located at the top of the mounting channel 101. Air supply windows 104 for communicating with the ventilation duct 1 are located on both sides of the mounting channel 101. The filter assembly 2 is placed within the air supply windows 104, completely sealing the air supply windows 104. The inner wall of the connecting window 102 is closed, and guide grooves 105 are provided on both sides to facilitate the movement of the filter assembly 2. The guide grooves 105 are symmetrically distributed along the axis of the installation channel 101. The inner wall of the connecting window 102 is provided on both sides to install the connecting assembly 3. The mounting grooves 106 are symmetrically distributed along the axis of the installation channel 101. The filter assembly 2 includes a fixing frame 201 for fixing multiple parts. The fixing frame 201 is placed inside the connecting window 102 and is slidably connected to the inner wall of the connecting window 102. The fixing frame 201 is built into a multi-layer glass fiber paper 202 for filtering air impurities. Multiple receiving plates 203 for accumulating dust are fixedly connected to the inner wall of the fixing frame 201. The side of the receiving plate 203 near the fixing frame 201 is connected to the glass fiber paper 202. 2. Multiple receiving plates 203 are evenly distributed along the height direction of the fixed frame 201. A support plate 204 for contacting other filter components 2 is fixedly connected to one side of the top of the fixed frame 201. The surface of the support plate 204 has a connecting hole 205 for easy lifting by the user. Multiple fixing rollers 206 for stabilizing the other filter components 2 are fixedly connected to the top of the fixed frame 201. The fixing rollers 206 are evenly distributed along the width direction of the fixed frame 201. Multiple fixing holes 207 matching the fixing rollers 206 are opened at the bottom of the fixed frame 201. The ends of the fixing rollers 206 and the fixing holes 207 that are close to each other have triggering inclined surfaces 214 to facilitate contact between them. The fixing rollers 206 are slidably connected to the hole walls of the fixing holes 207. The two sides of the fixed frame 201 are fixedly connected to There are mounting bases 211 for cooperating with the connecting component 3. The two mounting bases 211 are symmetrically distributed along the axis of the fixed frame 201. The end of the mounting base 211 away from the fixed frame 201 is fixedly connected to the hanging plate 212 for stabilizing the overall filter component 2. The connecting component 3 is provided with fixing grooves 301 for installing multiple parts. The fixing grooves 301 are opened on both sides of the groove wall of the mounting groove 106. The two mounting grooves 106 are symmetrically distributed along the axis of the hanging plate 212. The bottom of the inner cavity of the mounting groove 106 is rotatably connected to the mounting roller 302 for connecting the fixing base 304. The two ends of the mounting roller 302 are sleeved with coil springs 303 for driving the fixing base 304 to move. The coil springs 303 are placed in the fixing groove 301, and one end of the coil springs 303 is fixedly connected to the groove wall of the fixing groove 301.The other end of the coil spring 303 is fixedly connected to the surface of the mounting roller 302. The fixing seat 304 is sleeved on the surface of the mounting roller 302 and fixedly connected thereto. A top seat 305 for supporting the filter assembly 2 is fixedly connected to the side of the fixing seat 304 away from the mounting channel 101. The upper end face of the top seat 305 contacts and slides with the lower end face of the hanging plate 212. Multiple filter assemblies 2 are placed in the mounting channel 101 of the ventilation duct 1. Multiple fixed frames with glass fiber paper 202 are stacked on top of each other. The fixing holes 207 at the bottom of the upper fixed frame 201 are fixed. The filter assembly 2 is fixed in contact with the fixing holes 207 at the top of the lower fixing frame 201. The hanging plates 212 on both sides of the fixing frame 201 move within the mounting groove 106 without contacting the mounting plate. When the hanging plate 212 encounters multiple top seats 305 on the inner wall of the mounting duct 101, the top seats 305 are driven by the spring force of the coil springs 303 at both ends to contact the hanging plates 212 on both sides of the filter assembly 2 for support and fixation. When the fresh air is filtered by the primary filter, it undergoes preliminary filtration of the air under the action of the multi-layer glass fiber paper 202 set in the ventilation duct 1. The large amount of impurities and dust on the surface of the fiberglass paper 202 and multiple receiving plates 203 increases the weight of the overall filter assembly 2. As more and more dust accumulates on the top of the receiving plates 203 and inside the fiberglass paper 202, the filter assembly 2 drives the top seat 305 to rotate around the axis of the mounting roller 302, causing the fixed frame 201 to move lower and lower. During the downward movement of the fixed frame 201, the top support plate 204 continues to seal the connecting window 102, ensuring that the air still needs to pass through multiple layers of filtration before reaching the data center, resulting in higher airtightness. When the overall weight of the filter assembly 2 reaches a critical point, its fixed frame 201 will fall completely out of the connecting window 102, and the other filter assemblies 2 on top will naturally fill the gap in the air supply window 104. When the filter elements are covered with a large amount of dust and need to be replaced, the entire device can automatically replace the filter elements without manual intervention. Only occasional collection and addition of filter elements 2 by personnel is required, which is more time-saving and labor-saving. Furthermore, the preset dust level for filter element replacement can prevent excessive dust accumulation during daily use.

[0034] To reduce the friction of the overall device, multiple connecting seats 208 for mounting guide wheels 210 are fixedly connected to both sides of the fixed frame 201. The multiple connecting seats 208 are evenly distributed along the height direction of the fixed frame 201. The end of the connecting seat 208 away from the fixed frame 201 has a connecting groove 213 for mounting a rotating rod 209. The rotating rod 209 extends through the groove wall of the connecting groove 213 to the outside. The rotating rod 209 is rotatably connected to the connecting seat 208. The surface of the rotating rod 209 is sleeved with a guide wheel 210 for contacting the inner wall of the guide groove 105. The guide wheel 210 is fixedly connected to the rotating rod 209. The guide wheel 210 is placed in the mounting groove 106 and slidably connected to the groove wall of the mounting groove 106. The side of the guide wheel 210 away from the fixed frame 201 contacts the groove wall of the guide groove 105. The multiple guide wheels 210 reduce the friction between the filter assembly 2 and the mounting channel 101, so that the connecting assembly 3 can fully control the falling of the filter assembly 2.

[0035] Working principle

[0036] When the outdoor temperature is low, the fresh air electric valve 9, the return air electric valve 11 and the exhaust air electric valve 13 are adjusted and operated to mix the outdoor fresh air and return air and use the natural cold source for cooling. When the outdoor air humidity meets the indoor air humidity requirements, the outdoor fresh air and return air are directly mixed and then supplied. When the outdoor air humidity is lower than the indoor air humidity requirements, the direct evaporation section spray humidification is turned on at the same time. When the outdoor air humidity is higher than the indoor air humidity requirements, the DX direct expansion system dehumidification is turned on at the same time.

[0037] When the outdoor temperature is high, the fresh air electric valve 9 and the exhaust electric valve 13 open, while the return air electric valve 11 closes, switching the unit to 100% fresh air mode. When the outdoor air humidity is lower than the indoor air humidity requirement, cooling is provided using outdoor fresh air plus direct evaporative cooling. If the supply air temperature requirement is still not met after direct evaporative cooling, the DX direct expansion cooling system is activated to supplement cooling. For areas with low outdoor wet-bulb temperatures, the DX cooling system does not need to be activated. When the outdoor air humidity is higher than the indoor air humidity requirement, the DX direct expansion system is activated for cooling and dehumidification.

[0038] When severe environmental pollution occurs outdoors, the fresh air electric valve 9 and the exhaust electric valve 13 are closed, and the return air electric valve 11 is opened. The unit adopts the return air mode and uses the DX direct expansion system for cooling.

[0039] In daily use, multiple filter components 2 can be placed in the installation channel 101 of the ventilation duct 1. Multiple fixed frames with glass fiber paper 202 installed are stacked on top of each other. The fixing holes 207 at the bottom of the upper fixed frame 201 contact and fix with the fixing holes 207 at the top of the lower fixed frame 201. The hanging plates 212 on both sides of the fixed frame 201 move within the installation groove 106 without contacting it. When the hanging plate 212 encounters multiple top seats 305 on the inner wall of the installation channel 101, the top seats 305 will be activated by the coil springs 30 at both ends. 3. The elastic drive contacts the mounting plates 212 on both sides of the filter assembly 2 for support and fixation. When fresh air passes through the pre-filter 10, it undergoes preliminary filtration under the action of multiple layers of glass fiber paper 202 installed in the ventilation duct 1. A large amount of impurities and dust are placed on the surface of the glass fiber paper 202 and multiple receiving plates 203, increasing the overall weight of the filter assembly 2. As more and more dust accumulates on the top of the receiving plate 203 and inside the glass fiber paper 202, the filter assembly 2 will drive the top seat 305. Rotating around the axis of the mounting roller 302 causes the fixed frame 201 to move lower and lower. As the fixed frame 201 moves downward, the top support plate 204 continues to seal the connecting window 102, ensuring that the air still needs to pass through multiple layers of filtration before reaching the data center, thus achieving higher airtightness. When the overall weight of the filter assembly 2 reaches a critical point, its fixed frame 201 will fall completely out of the connecting window 102. Other filter assemblies 2 on top will naturally fill the gap in the air supply window 104. The multiple guide wheels 210 reduce the friction between the filter assembly 2 and the mounting channel 101, allowing the connecting assembly 3 to fully control the falling of the filter assembly 2. When the filter element is covered with a large amount of dust and needs to be replaced, the entire device can automatically replace the filter element without manual intervention. Only occasional collection and addition of the filter assembly 2 are required, which is more time-saving and labor-saving. Furthermore, the preset dust level for filter element replacement can prevent staff from forgetting to inspect the ventilation duct 1 during daily use, resulting in excessive dust accumulation and affecting the subsequent air conditioning effect.

[0040] Evaporative cooling technology has a wide range of applications. It makes full use of dry air energy and natural cold sources, which is conducive to energy conservation and emission reduction. Compared with indirect evaporative cooling, natural cooling takes longer and is more energy efficient. The air conditioning unit uses direct evaporative cooling technology and has three modes: fresh air and return air mixing, fresh air and full return air. It makes full use of natural cold sources and uses the evaporative cooling section and DX direct expansion cooling section to regulate the temperature and humidity of the unit's supply air to meet the energy-saving needs of different seasons.

[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A combined direct evaporative cooling air conditioning unit, characterized in that, The system includes a mixing section (4), which comprises a fresh air electric valve (9), a return air electric valve (11), and an exhaust air electric valve (13). The return air electric valve (11) and the exhaust air electric valve (13) are located on top of the fresh air electric valve (9). A filter section (5) is provided on one side of the mixing section (4). The filter section (5) includes a primary filter (10), which is located on the side of the fresh air electric valve (9) near the filter section (5). The primary filter (10) is connected to the fresh air electric valve (9). A medium-efficiency filter (19) is provided on the side of the primary filter (10) away from the fresh air electric valve (9). A direct evaporative cooling section (6) is provided on the side of the filter section (5) away from the mixing section (4). The direct evaporative cooling section (6) includes a baffle plate (14) and a water pump (15). A supplementary cooling section (7) is provided on the side of the direct evaporative cooling section (6) away from the filter section (5). The supplementary cooling section (7) includes an evaporator (16). The air passing through the fresh air electric valve (9) is mixed with the air produced by the evaporator (16) after passing through the primary filter (10) and the medium-efficiency filter (19). An air supply section (8) is provided on the side of the supplementary cooling section (7) away from the direct evaporative cooling section (6). The air supply section (8) includes a blower (18) and a return air supply section. The return air fan (17) returns the return air to the mixing section (4) after passing through the return air electric valve (11) and the exhaust electric valve (13); the primary filter (10) includes a ventilation duct (1) for external air to enter the data center, the top of the ventilation duct (1) is fixedly connected to an installation channel (101) for installing multiple components, the installation channel (101) has a built-in filter component (2) for preliminary filtration of external air, the inner wall of the installation channel (101) is provided with a connecting component (3) for stabilizing the filter component (2), and the filter component (2) is fixed to the installation channel (101) through the connecting component (3); The top of the installation tunnel (101) is provided with a connecting window (102) for the filter assembly (2) to pass through. The sides of the installation tunnel (101) are provided with air supply windows (104) for communicating with the ventilation duct (1). The filter assembly (2) is placed in the air supply window (104) and the air supply window (104) is completely closed. The inner walls of the connecting window (102) are provided with guide grooves (105) to facilitate the movement of the filter assembly (2). The guide grooves (105) on both sides are symmetrically distributed along the axis of the installation tunnel (101). The inner walls of the connecting window (102) are provided with mounting grooves (106) for installing the connecting assembly (3).The filter assembly (2) includes a fixing frame (201) for fixing multiple parts. The fixing frame (201) is placed inside the communicating window (102) and slidably connected to the inner wall of the communicating window (102). The fixing frame (201) is built into a glass fiber paper (202) with multiple layers for filtering air impurities. Multiple receiving plates (203) for accumulating dust are fixedly connected to the inner wall of the fixing frame (201). The side of the receiving plate (203) near the fixing frame (201) contacts the glass fiber paper (202). The multiple receiving plates (203) 3) The support plate (204) for contacting other filter components (2) is fixedly connected to one side of the top of the fixed frame (201) evenly distributed along the height direction of the fixed frame (201). The support plate (204) has a connecting hole (205) on its surface to facilitate the user's carrying. The mounting base (211) for cooperating with the connecting component (3) is fixedly connected to both sides of the fixed frame (201). The mounting bases (211) on both sides are symmetrically distributed along the axis of the fixed frame (201). The end of the mounting base (211) away from the fixed frame (201) is fixedly connected to the support plate (204). A mounting plate (212) is attached to stabilize the overall filter assembly (2). The connecting assembly (3) includes a fixing groove (301) for mounting multiple parts. The fixing groove (301) is opened on both sides of the mounting groove (106). The mounting grooves (106) on both sides are symmetrically distributed along the axis of the mounting plate (212). The bottom of the inner cavity of the mounting groove (106) is rotatably connected to the mounting roller (302) for connecting the fixing seat (304). The two ends of the mounting roller (302) are sleeved with coil springs (303) for driving the fixing seat (304) to move. The coil spring (303) is placed in the fixing groove (301); one end of the coil spring (303) is fixedly connected to the groove wall of the fixing groove (301), and the other end of the coil spring (303) is fixedly connected to the surface of the mounting roller (302). The fixing seat (304) is sleeved on the surface of the mounting roller (302) and fixedly connected thereto. A top seat (305) for supporting the filter assembly (2) is fixedly connected to the side of the fixing seat (304) away from the mounting channel (101). The upper end surface of the top seat (305) contacts and slides with the lower end surface of the hanging plate (212).

2. The combined direct evaporative cooling air conditioning unit according to claim 1, characterized in that, The top of the fixed frame (201) is fixedly connected with a plurality of fixed rollers (206) for stabilizing the remaining filter components (2). The fixed rollers (206) are evenly distributed along the width direction of the fixed frame (201). The bottom of the fixed frame (201) is provided with a plurality of fixed holes (207) that match the fixed rollers (206). The fixed rollers (206) and the fixed holes (207) are provided with triggering inclined surfaces (214) at the ends that are close to each other to facilitate contact between the two. The fixed rollers (206) are slidably connected to the hole walls of the fixed holes (207).

3. A combined direct evaporative cooling air conditioning unit according to claim 2, characterized in that, Multiple connecting seats (208) for mounting guide wheels (210) are fixedly connected to both sides of the fixed frame (201). The connecting seats (208) are evenly distributed along the height direction of the fixed frame (201). A connecting groove (213) for mounting a rotating rod (209) is opened at one end of the connecting seat (208) away from the fixed frame (201). The rotating rod (209) extends through the groove wall of the connecting groove (213) to the outside of the connecting seat (208).

4. A combined direct evaporative cooling air conditioning unit according to claim 3, characterized in that, The rotating rod (209) is rotatably connected to the connecting seat (208). A guide wheel (210) for contacting the groove wall of the guide groove (105) is sleeved on the surface of the rotating rod (209). The guide wheel (210) is fixedly connected to the rotating rod (209). The guide wheel (210) is placed in the mounting groove (106) and slidably connected to the groove wall of the mounting groove (106).

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