Evaporative cooling air conditioning device

Abstract

The application provides an evaporative cooling air conditioning device, and relates to the technical field of heating and ventilation, which comprises a shell, a cooling channel arranged in the shell and a working channel located outside the cooling channel, an air inlet is arranged on one side of the working channel, an air outlet for delivering cooled air to the outside is arranged on the other side of the working channel, the air flow direction is from the air inlet to the air outlet, and the air inlet and the air outlet are respectively arranged on the two end faces of the shell; the cooling channel comprises a dry channel and a wet channel arranged on the periphery of the dry channel, the air flow direction of the cooling channel is arranged perpendicularly to the air flow direction of the working channel, and a water suction device is arranged between the dry channel and the wet channel, and the application has the beneficial effect that the air delivered into the room is cooled by heat exchange with the air in the wet channel, so that the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of heating and ventilation technology, and in particular to an evaporative cooling air conditioning device. Background Technology

[0002] With the continuous advancement of global science and technology and the constant improvement of industrial production levels, people's living standards have gradually improved, leading to a growing demand for resources. However, the continuous exploitation of global resources has resulted in their gradual depletion and energy shortages. Furthermore, the irrational use of already exploited natural resources has directly led to ecological damage, low energy efficiency, and even massive energy waste.

[0003] Building energy consumption accounts for an increasingly larger share of global energy consumption, with air conditioning energy consumption being the largest contributor. In my country, building energy consumption already accounts for 30% of total energy consumption.

[0004] However, since traditional vapor compression refrigeration technology consumes a large amount of high-quality electricity, there is an urgent need to develop an energy-saving and environmentally friendly air conditioning device. Summary of the Invention

[0005] The purpose of this invention is to provide an evaporative cooling air conditioning device to solve the technical problem that traditional vapor compression refrigeration technology in the prior art consumes a large amount of high-quality electrical energy. 。 The preferred technical solutions among the many technical solutions provided by this invention can produce a variety of technical effects, which are described in detail below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides an evaporative cooling air conditioning device, comprising a housing, a cooling channel disposed within the housing, and a working channel located outside the cooling channel, wherein:

[0008] An air inlet is provided on one side of the working channel, and an air outlet is provided on the other side of the working channel for supplying cooled air to the outside. The airflow direction is from the air inlet to the air outlet. The air inlet and the air outlet are located on the two end faces of the housing, respectively.

[0009] The cooling channel includes a dry channel and a wet channel disposed around the outer periphery of the dry channel. The airflow direction of the cooling channel is perpendicular to the airflow direction of the working channel. A water absorption device is disposed between the dry channel and the wet channel.

[0010] Preferably, the cooling channel further includes a water distribution pipe, wherein:

[0011] The water distribution pipe is arranged along the length of the cooling channel and is located between the dry channel and the wet channel;

[0012] The water distribution pipe is provided with water distribution holes, and the water inlet of the water distribution pipe is located on the housing.

[0013] Preferably, the water distribution pipe is a capillary tube, and the water distribution holes include a plurality of holes, which are evenly distributed along the length of the water distribution pipe.

[0014] Preferably, the housing is further provided with a return air fan, a return air inlet, and a return air outlet, wherein:

[0015] The return air inlet is disposed on the housing and located on the side close to the dry channel inlet; the return air fan is disposed between the return air inlet and the dry channel inlet.

[0016] The return air vent is located on the top surface of the housing.

[0017] Preferably, a blower is also provided inside the housing, and the blower is located inside the air inlet.

[0018] Preferably, the main channel is further provided with an air outlet, wherein:

[0019] The air inlet of the dry channel is located on one side of the dry channel, and the air outlet is located on the other side of the dry channel, which is opened on the side wall of the dry channel and communicates with the wet channel.

[0020] Preferably, the wet channel is further provided with an exhaust vent, wherein:

[0021] The exhaust vent is located on the side wall of the wet passage, away from the air outlet, and the wet passage is connected to the working passage through the exhaust vent.

[0022] Preferably, the water-absorbing device uses a water-absorbing film, which is attached to the outer wall of the dry channel and the inner wall of the wet channel.

[0023] The evaporative cooling air conditioning device provided by this invention comprises a housing with a cooling channel and a working channel located outside the cooling channel. The airflow direction of the cooling channel is perpendicular to that of the working channel. In the working channel, inlet air flows in perpendicular to the cooling channel and exits after passing through the cooling channel. The outlet air at this point is the product air supplied to the air-conditioned room. The cooling channel includes a dry channel and a wet channel located around the periphery of the dry channel. A water absorption device is installed between the dry and wet channels. By absorbing the sensible heat from the air in the dry and working channels within the cooling channel, the water absorption device enhances the phase change heat transfer in the wet channel, thereby exchanging heat and cooling the air to be supplied to the room with the air in the wet channel, thus reducing energy consumption. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the evaporative cooling air conditioning device of the present invention;

[0026] Figure 2 This is a schematic diagram illustrating the working principle of the evaporative cooling and air conditioning device of the present invention.

[0027] Figure 3 yes Figure 1 Schematic diagram of the sectional structure of the middle AA section;

[0028] Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle BB;

[0029] Figure 5 This is a schematic diagram of heat and mass transfer in the dry channel control body of the evaporative cooling and air conditioning device of the present invention;

[0030] Figure 6 This is a schematic diagram of heat and mass transfer in the dry channel control body of the evaporative cooling and air conditioning device of the present invention;

[0031] Figure 7 This is a top view of the cooling channel structure in this embodiment.

[0032] In the diagram: 1. Shell; 11. Return air inlet; 12. Return air outlet; 2. Cooling passage; 21. Dry passage; 211. Dry passage inlet; 212. Outlet; 22. Wet passage; 221. Outlet; 23. Water suction device; 24. Water distribution pipe; 241. Water inlet; 242. Water distribution hole; 3. Working passage; 31. Air inlet; 32. Air outlet; 4. Return air fan; 5. Air supply fan. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0034] This invention provides an evaporative cooling air conditioning device. Figure 1 This is a top view of the structure in this embodiment. Figure 2 This is a schematic diagram illustrating the working principle of this embodiment, as follows: Figure 1 and Figure 2 As shown, it includes a housing 1, a cooling channel 2 disposed inside the housing 1, and a working channel 3 located outside the cooling channel 2.

[0035] in, Figure 3 yes Figure 1 Schematic diagram of the AA section structure. Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure of the middle BB, as shown below. Figure 3 and Figure 4 As shown, an air inlet 31 is provided on one side of the working channel 3, and an air outlet 32 ​​is provided on the other side of the working channel 3 for supplying cooled air to the outside. The airflow direction is from the air inlet 31 to the air outlet 32. The air inlet 31 and the air outlet 32 ​​are located on the two end faces of the housing 1, respectively.

[0036] The cooling channel 2 includes a dry channel 21 and a wet channel 22 disposed on the outer periphery of the dry channel 21. The airflow direction of the cooling channel 2 is perpendicular to the airflow direction of the working channel 3. A water absorption device 23 is disposed between the dry channel 21 and the wet channel 22.

[0037] Specifically, in this embodiment, the water absorption device 23 uses a water-absorbing film, which is attached to the outer wall of the dry channel 21 and the inner wall of the wet channel 22 to absorb the sensible heat from the air in the dry channel and the working channel.

[0038] In the working channel, the air inlet 31 flows into the working channel 3 perpendicular to the cooling channel direction; after flowing through the cooling channel, it flows out of the working channel, and the air at the outlet, i.e. the air outlet 32, is the product air supplied to the air-conditioned room.

[0039] Figure 5 This is a schematic diagram of heat and mass transfer in the dry channel control volume. Figure 6 This is a schematic diagram of heat and mass transfer in the wet channel control unit. Based on the study of the internal heat exchange process and working principle of the evaporative cooling device, and combined with the heat exchange mechanism and empirical formulas between water and air, a mathematical model is established for this device to describe its actual air handling process during operation. The heat and mass transfer processes in the dry and wet channels of the evaporative cooling device are as follows: Figure 5 and Figure 6 As shown.

[0040] The heat transfer process of the gas in the dry channel can be described by the following heat balance equation and Newton's law of cooling:

[0041] Q d =C p M d (T d,j -T d,j+1 )

[0042]

[0043] In the formula, Q d For the heat exchange in the dry channel (W), C p M is the specific heat of air (J / kg K). d The inlet air mass flow rate (kg / s) is h. d Let T be the convective heat transfer coefficient within the dry channel, T be the air temperature (K), and A be the heat exchange area.

[0044] The total heat exchange between the air and cooling water in the wet passage consists of two parts: sensible heat exchange driven by temperature difference and latent heat caused by the partial pressure of water vapor. The process is described by the following formula:

[0045] Q w =M w (i w,j -i w,j+1 )

[0046]

[0047]

[0048]

[0049] In the formula, Q w For the heat exchange in the wet channel (W), M wThe mass flow rate of the air at the wet passage inlet (kg / s), h w h m ω represents the heat transfer and mass transfer coefficients (m / s) of the convective heat transfer and mass transfer coefficients inside the humid channel, respectively, and the relationship between the two satisfies the Lewis relation; ω is the air moisture content (g / kg), and i is the air enthalpy (kJ / kg).

[0050] As an optional implementation, the cooling channel 2 also includes a water distribution pipe 24. The water distribution pipe 24 is arranged along the length of the cooling channel 2 and is located between the dry channel 21 and the wet channel 22.

[0051] Water distribution pipe 24 is provided with water distribution holes 242, and water inlet 241 of water distribution pipe 24 is located on housing 1. Specifically, water distribution pipe 24 is a capillary tube, and multiple water distribution holes 242 are evenly distributed on water distribution pipe 24 along the length direction of water distribution pipe 24.

[0052] No special spraying equipment is needed to spray the wet channel 22. The water distribution is uniform through the cooperation of the water distribution pipe 24 and the water-absorbing membrane, and there are no special requirements for the water supply temperature. Room temperature water can be used, which greatly reduces the energy consumption of air handling and saves production costs in production operation. This evaporative cooling air conditioning unit is suitable for commercial and residential use.

[0053] As an optional implementation, the housing 1 is also provided with a return air fan 4, a return air inlet 11, and a return air outlet 12.

[0054] The return air inlet 11 is located on the housing 1, on the side close to the dry channel inlet 211. The return air fan 4 is located between the return air inlet 11 and the dry channel inlet 211. The return air exhaust outlet 12 is located on the top surface of the housing 1, close to the dry channel inlet 211.

[0055] Specifically, a blower 5 is also provided inside the housing 1, and the blower 5 is located inside the air inlet 31.

[0056] Figure 7 This is a top view of the cooling channel structure in this embodiment, as shown below. Figure 7 As shown, in this embodiment, an air outlet 212 is also provided on the dry channel 21. The dry channel air inlet 211 is located on one side of the dry channel 21, and the air outlet 212 is located on the other side of the dry channel 21, and is opened on the side wall of the dry channel 21, communicating with the wet channel 22.

[0057] The wet passage 22 is also equipped with an exhaust vent 221. The exhaust vent 221 is located on the side wall of the wet passage 22, on the side away from the air outlet 212. The wet passage 22 is connected to the working passage 3 through the exhaust vent 221.

[0058] The working process of this example:

[0059] First, the water inlet 241 is opened, and water enters the water distribution pipe 24. Water drips through the water distribution holes on the water distribution pipe 24 onto the water absorption device 23, i.e., the water absorption membrane. The water absorption membrane located around the wet channel 22 absorbs the water dripping from the water distribution holes 242 through capillary action and quickly covers the entire water absorption membrane, ensuring sufficient water distribution in the wet channel 22.

[0060] Then, the return air fan 4 and the supply air fan 5 are turned on synchronously, and the air volume of the supply air fan 5 is adjusted to meet the air conditioning requirements. During operation, the return air enters through the return air inlet 11 and then enters the cooling channel 2 through the dry channel inlet 211. Then, along... Figure 7 The air flows in the direction of the arrow, through the outlet 212 of the dry channel 21, and into the wet channel 22. This part of the air undergoes heat and mass exchange with the moisture in the water-absorbing film, absorbing the sensible heat in the dry channel 21 and the working channel 3, so that the air temperature in the dry channel 21 continuously decreases.

[0061] After the heat and mass exchange process in the wet passage 22 is completed, the air is discharged from the wet passage exhaust port 221 and then discharged from the cooling passage through the return air exhaust port 12. The air in the working passage 3 is fed into the device by the air supply fan 5 through the air inlet 31. As the sensible heat is absorbed by the wet passage 22, the temperature drops, achieving the purpose of air conditioning and cooling. The air is then sent into the room through the air supply port 32.

[0062] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An evaporative cooling air conditioning device, characterized in that: It includes a housing, a cooling channel disposed within the housing, and a working channel located outside the cooling channel, wherein: An air inlet is provided on one side of the working channel, and an air outlet is provided on the other side of the working channel for supplying cooled air to the outside. The airflow direction is from the air inlet to the air outlet. The air inlet and the air outlet are located on the two end faces of the housing, respectively. The cooling channel includes a dry channel and a wet channel disposed on the outer periphery of the dry channel. The airflow direction of the cooling channel is perpendicular to the airflow direction of the working channel. A water absorption device is disposed between the dry channel and the wet channel. The cooling channel also includes water distribution pipes, wherein: The water distribution pipe is arranged along the length of the cooling channel and is located between the dry channel and the wet channel; The water distribution pipe is provided with water distribution holes, and the water inlet of the water distribution pipe is located on the housing; The water distribution pipe is a capillary tube, and the water distribution holes include multiple holes, which are evenly distributed along the length of the water distribution pipe. The water absorption device uses a water-absorbing film, which is attached to the outer wall of the dry channel and the inner wall of the wet channel.

2. The evaporative cooling air conditioning device according to claim 1, characterized in that: The housing also includes a return air fan, a return air inlet, and a return air outlet, wherein: The return air inlet is disposed on the housing and located on the side close to the dry channel inlet; the return air fan is disposed between the return air inlet and the dry channel inlet. The return air vent is located on the top surface of the housing.

3. The evaporative cooling air conditioning device according to claim 1, characterized in that: The housing is also equipped with a blower, which is located inside the air inlet.

4. An evaporative cooling air conditioning device according to any one of claims 1-3, characterized in that: The main channel is also equipped with air outlets, wherein: The air inlet of the dry channel is located on one side of the dry channel, and the air outlet is located on the other side of the dry channel, which is opened on the side wall of the dry channel and communicates with the wet channel.

5. The evaporative cooling air conditioning device according to claim 4, characterized in that: The wet passage is also equipped with an exhaust vent, wherein: The exhaust vent is located on the side wall of the wet passage, away from the air outlet, and the wet passage is connected to the working passage through the exhaust vent.

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