Outdoor direct evaporation cooling air conditioner

Abstract

The utility model relates to an outdoor direct evaporation cooling air conditioner which comprises an upper-layer air return unit and a lower-layer air supply unit, an air inlet of the upper-layer air return unit is communicated with an indoor space, and an air outlet of the upper-layer air return unit is communicated with an outdoor space; an air inlet of the lower-layer air supply unit communicates with the outdoor space, and an air outlet communicates with the indoor space; the lower-layer air supply unit comprises a lower shell, an air inlet valve, a primary-effect filter screen, a medium-effect filter screen, a cooling wet film, a water receiving disc, a water collecting wet film, a circulating pump, a water distributor and an exhaust fan, the air inlet valve is arranged at an air inlet of the lower shell, the primary-effect filter screen is located behind the air inlet valve, the medium-effect filter screen is located behind the primary-effect filter screen, and the cooling wet film is located behind the circulating pump. The cooling wet film is located behind the medium-efficiency filter screen, the water collecting wet film is located behind the cooling wet film, the water distributor is located above the cooling wet film, the water receiving disc is located below the cooling wet film, one end of the circulating pump is communicated with the water receiving disc, the other end of the circulating pump is communicated with the water distributor, and the exhaust fan is located at an air outlet of the lower shell. The method can save energy and reduce consumption.

Description

Technical Field

[0001] The utility model relates to the field of indoor cooling equipment, in particular to a direct evaporative cooling air conditioner placed outdoors. Background Art

[0002] Nowadays, computer rooms in data centers or some large shopping malls, schools, etc. usually use chillers to provide chilled water for cooling. However, this method consumes a lot of energy, especially in the dry northern regions. How to reduce energy consumption and use new energy-saving air-conditioning equipment has become a priority issue in the dry northern regions. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a direct evaporative cooling air conditioner placed outdoors. The technical solution of the implementation case of this utility model is as follows:

[0004] A direct evaporative cooling air conditioner placed outdoors comprises an upper return air unit and a lower air supply unit, the air inlet of the upper return air unit is connected to the indoor space through a pipe, and the air outlet of the upper return air unit is connected to the outdoor space through a pipe; the air inlet of the lower air supply unit is connected to the outdoor space through a pipe, and the air outlet of the lower air supply unit is connected to the indoor space through a pipe; the lower air supply unit comprises a lower shell and an air inlet valve, a primary filter, a medium-efficiency filter, a cooling wet film, a water receiving tray, a water collecting wet film, a circulating pump, a water distributor, and an exhaust fan located inside the lower shell. The air inlet valve is placed at the air inlet of the lower shell, the primary filter is located behind the air inlet valve, the medium efficiency filter is located behind the primary filter, the cooling wet film is located behind the medium efficiency filter, the water collecting wet film is located behind the cooling wet film, the water distributor is located above the cooling wet film, the water receiving pan is located below the cooling wet film and the water collecting wet film, one end of the circulating pump is connected to the water receiving pan through a pipe, and the other end of the circulating pump is connected to the water distributor through a pipe, and the exhaust fan is located at the air outlet of the lower shell.

[0005] Preferably, the lower air supply unit also includes a wind and rain shield cap, the air inlet of the wind and rain shield cap is connected to the outdoor space, the air outlet of the wind and rain shield cap is connected to the air inlet of the lower shell, the air inlet of the wind and rain shield cap is tilted downward, and the upper partition of the wind and rain shield cap is arc-shaped.

[0006] Preferably, the lower air supply unit further includes rainproof louvers, which are located in front of the air inlet valve.

[0007] Preferably, the upper return air unit includes a waste heat recovery coil, and the pipeline of the waste heat recovery coil is connected to the external domestic water network.

[0008] Preferably, the upper return air unit further includes an air mixing valve, which is located at the lower vent of the upper return air unit, and the lower vent of the upper return air unit is connected to the upper vent of the lower air supply unit.

[0009] Compared with the existing technology, the beneficial effects of the present invention are: by arranging a waste heat recovery coil in the upper return air unit, the heat of the hot air recovered in the room is recovered, and the heat is used to supplement the heating heat of domestic water; by arranging a cooling wet film, a water distributor, a water collector, and a circulating pump in the lower air supply unit, the external dry air is cooled during direct evaporation with cooling water, and cold air is input into the room; by arranging a wind and rain shield cap, the upper hot air can be prevented from being blown into the lower layer, and external impurities and rainwater can be prevented from entering the lower shell; by arranging rainproof louvers, rainwater can be further prevented from entering the interior of the air conditioner; by arranging a mixing valve, the low-humidity air after heat exchange can be introduced into the lower equipment, forming a closed-loop circulation between the equipment and the indoor air, thereby preventing pollution from the external air. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front cross-sectional schematic diagram of a direct evaporative cooling air conditioner placed outdoors in the present invention;

[0011] 10. Upper return air unit; 11. Waste heat recovery coil; 12. Air mixing valve; 20. Lower supply air unit; 21. Air inlet valve; 22. Primary filter; 23. Medium filter; 24. Cooling wet film; 25. Drain tray; 26. Water collecting wet film; 27. Circulation pump; 28. Water distributor; 29. ​​Exhaust fan; 30. Lower shell; 31. Rainproof louvers; 32. Wind and rain shield; 33. Upper partition; 34. Air inlet; 40. Indoor space. DETAILED DESCRIPTION

[0012] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to facilitate a more thorough and comprehensive understanding of the disclosure of the present invention.

[0013] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0014] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0015] like Figure 1 As shown, a schematic front cross-sectional view of a direct evaporative cooling air conditioner placed outdoors; a direct evaporative cooling air conditioner placed outdoors, comprising an upper return air unit 10 and a lower air supply unit 20, the air inlet of the upper return air unit 10 being connected to an indoor space 40 via a pipe, and the air outlet of the upper return air unit 10 being connected to an outdoor space via a pipe; the air inlet of the lower air supply unit 20 being connected to an outdoor space via a pipe, and the air outlet of the lower air supply unit 20 being connected to an indoor space 40 via a pipe; the lower air supply unit 20 comprising a lower shell 30 and an air inlet valve 21, a primary filter 22, a medium filter 23, a cooling wet film 24, a water receiving tray 25, a water collecting wet film 26, a circulating pump 27, a cloth Water distributor 28, exhaust fan 29, the air inlet valve 21 is placed at the air inlet of the lower shell 30, the primary filter 22 is located behind the air inlet valve 21, the medium efficiency filter 23 is located behind the primary filter 22, the cooling wet film 24 is located behind the medium efficiency filter 23, the water collecting wet film 26 is located behind the cooling wet film 24, the water distributor 28 is located above the cooling wet film 26, the water receiving tray 25 is located below the cooling wet film 24 and the water collecting wet film 26, one end of the circulating pump 27 is connected to the water receiving tray 25 through a pipe, and the other end of the circulating pump 27 is connected to the water distributor 28 through a pipe, and the exhaust fan 29 is located at the air outlet of the lower shell 30.

[0016] The air conditioning equipment of this patent is placed outdoors, and cools the indoor space by ventilating the room, extracting hot air, and delivering cold air. It is divided into two layers, the upper layer recycles the hot air of the indoor air, and the lower layer prepares cold air and delivers the cold air to the indoor air. The lower air supply unit prepares cold air by sucking dry air from the outside and performing evaporative heat exchange with the cooling water on the wet film inside it. The outside air passes through the air inlet, is preliminarily filtered by the primary filter to filter out larger debris, and then passes through the medium efficiency filter to filter out smaller impurities and dust, so that the air entering the cooling wet film remains pure. The pure air directly evaporates and exchanges heat with the cooling water sprinkled with the cooling wet film. In the dry air environment, the cooling water evaporates faster, the cooling water temperature drops more, and the air temperature drops more. The low-temperature cooling water is collected in the water receiving pan and is transported to the water distributor under the suction of the circulation pump. The high-humidity cold air absorbs moisture through the water-absorbing wet film, and the moisture condenses and converges in the water receiving pan. In this way, the cold air is transported to the indoor space through the air outlet under the action of the exhaust fan for heat exchange and cooling. This air conditioning system uses a fully natural cooling solution, eliminating the need for mechanical cooling. The PUE of the entire HVAC system is very low.

[0017] In order to prevent wind and rain from entering the interior of the equipment from crossing between the upper and lower layers, preferably, the lower air supply unit 10 also includes a wind and rain shield cap 32, the air inlet of the wind and rain shield cap 32 is connected to the outdoor space, the air outlet of the wind and rain shield cap 32 is connected to the air inlet of the lower shell 30, the air inlet 34 of the wind and rain shield cap 32 is tilted downward, and the upper partition 33 of the wind and rain shield cap 32 is arc-shaped.

[0018] The wind and rain shield is located at the lower air inlet. Its upper baffle is curved, blocking the hot air from the upper layer and preventing it from entering the equipment below. The air inlet is also tilted downward, so that the outside air entering the lower layer is cold air, further preventing the hot air from entering the equipment below. It also prevents rain from entering the equipment on rainy days.

[0019] In order to further prevent rainwater from entering the equipment in special weather conditions, preferably, the lower air supply unit 20 further includes rainproof louvers 31 , and the rainproof louvers 31 are located in front of the air inlet valve 21 .

[0020] By setting rainproof louvers at the air inlet, when there is strong wind and heavy rain outside, it can also prevent rainwater from entering the equipment and affecting the performance of the equipment.

[0021] In order to fully utilize the heat of the indoor space, preferably, the upper return air unit 10 includes a waste heat recovery coil 11, and the pipeline of the waste heat recovery coil 11 is connected to the external domestic water network.

[0022] A waste heat recovery coil is set on the upper layer of the equipment. By connecting the domestic water pipe network with the waste heat recovery coil, the heat of the hot air is exchanged with the domestic water, and the domestic water absorbs the heat of the hot air.

[0023] In order to reduce the possibility of impurities entering from outside air, preferably, the upper return air unit 10 also includes an air mixing valve 12, which is located at the lower vent of the upper return air unit 10, and the lower vent of the upper return air unit 20 is connected to the upper vent of the lower air supply unit 10.

[0024] After the hot air in the upper layer is cooled down, it enters the lower layer through the air mixing valve, exchanges heat with the cooling water on the cooling wet film, and becomes cold air after heat exchange and is transported to the room. This forms a closed loop cycle of air heat exchange, which does not require the participation of external air, thereby reducing the possibility of abnormal impurities brought by external air.

[0025] Compared with the existing technology, the beneficial effects of the present invention are: by arranging a waste heat recovery coil in the upper return air unit, the heat of the hot air recovered in the room is recovered, and the heat is used to supplement the heating heat of domestic water; by arranging a cooling wet film, a water distributor, a water collector, and a circulating pump in the lower air supply unit, the external dry air is cooled during direct evaporation with cooling water, and cold air is input into the room; by arranging a wind and rain shield cap, the upper hot air can be prevented from being blown into the lower layer, and external impurities and rainwater can be prevented from entering the lower shell; by arranging rainproof louvers, rainwater can be further prevented from entering the interior of the air conditioner; by arranging a mixing valve, the low-humidity air after heat exchange can be introduced into the lower equipment, forming a closed-loop circulation between the equipment and the indoor air, thereby preventing pollution from the external air.

[0026] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The above embodiments merely represent preferred implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A direct evaporative cooling air conditioner placed outdoors, characterized by: The air inlet of the upper return air unit is connected to the indoor space through a pipe, and the air outlet of the upper return air unit is connected to the outdoor space through a pipe; the air inlet of the lower air supply unit is connected to the outdoor space through a pipe, and the air outlet of the lower air supply unit is connected to the indoor space through a pipe; the lower air supply unit includes a lower shell and an air inlet valve, a primary filter, a medium-efficiency filter, a cooling wet film, a water receiving tray, a water collecting wet film, a circulation pump, a water distributor, and an exhaust fan located inside the lower shell. The air inlet valve is placed At the air inlet of the lower shell, the primary filter is located behind the air inlet valve, the medium-efficiency filter is located behind the primary filter, the cooling wet film is located behind the medium-efficiency filter, the water-receiving wet film is located behind the cooling wet film, the water distributor is located above the cooling wet film, the water receiving pan is located below the cooling wet film and the water-receiving wet film, one end of the circulating pump is connected to the water receiving pan through a pipe, and the other end of the circulating pump is connected to the water distributor through a pipe, and the exhaust fan is located at the air outlet of the lower shell.

2. The direct evaporative cooling air conditioner placed outdoors as claimed in claim 1, characterized in that: The lower air supply unit also includes a wind and rain shield cap, the air inlet of the wind and rain shield cap is connected to the outdoor space, the air outlet of the wind and rain shield cap is connected to the air inlet of the lower shell, the air inlet of the wind and rain shield cap is tilted downward, and the upper partition of the wind and rain shield cap is arc-shaped.

3. The direct evaporative cooling air conditioner placed outdoors as claimed in claim 2, characterized in that: The lower air supply unit further includes rainproof louvers, which are located in front of the air inlet valve.

4. The direct evaporative cooling air conditioner placed outdoors as claimed in claim 3, characterized in that: The upper return air unit includes a waste heat recovery coil, and the pipeline of the waste heat recovery coil is connected to the external domestic water network.

5. The direct evaporative cooling air conditioner placed outdoors as claimed in claim 4, characterized in that: The upper return air unit further includes an air mixing valve, which is located at the lower vent of the upper return air unit. The lower vent of the upper return air unit is connected to the upper vent of the lower air supply unit.

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