A cold air type evaporator

Abstract

This utility model applies to the field of evaporators and provides a cold air evaporator, comprising: a shell; a fan installed at the bottom of the shell; a first airflow channel disposed on the side wall of the fan; a filter screen disposed on the shell corresponding to the airflow channel; a water curtain installed on the inner wall of the shell and corresponding to the airflow channel; the top of the water curtain is hinged to the inner wall of the shell; a water inlet is disposed on the shell at the upper position of the water curtain; a water outlet is disposed on the shell at the upper position of the water curtain; during cleaning, the water curtain rotates around the hinge point and is set at an angle to the inside of the shell, forming a second airflow channel between them; the fan drives the airflow from the inside of the shell through the filter screen to the outside. Therefore, this utility model can: 1. Clean the filter screen by driving a reverse airflow through the fan, eliminating the need for manual disassembly and improving cleaning efficiency; 2. Utilize the change in the state of the water curtain to achieve a guiding effect, assisting in optimizing the airflow cleaning process.

Description

Technical Field

[0001] This utility model relates to the field of evaporators, and more particularly to a cold air evaporator. Background Technology

[0002] Absorption air conditioning utilizes thermal energy to drive a refrigeration cycle, achieving cooling output through the adsorption and desorption of refrigerant by an absorbent. Its core components include a generator, condenser, evaporator, and absorber, commonly using lithium bromide-water or ammonia-water refrigerant pairs. It is suitable for scenarios involving the recovery of low-grade heat sources such as waste heat and solar energy, and features energy-saving and environmentally friendly characteristics.

[0003] The cold-air evaporator is an important component of absorption air conditioning. Its principle is to use the vaporization phenomenon of water (or other media) to remove heat from the air. The main components include a fan and a wet curtain. When the wet curtain comes into contact with water, a water film will form on its surface. The operation of the fan will generate negative pressure, allowing hot air to come into direct contact with the water film on the wet curtain, achieving evaporation and heat absorption for cooling. Subsequently, the cold air comes into contact with the heat exchange tubes, achieving the cooling of the medium inside the heat exchange tubes.

[0004] In the current structure, the external hot airflow needs to pass through a filter before entering the equipment and coming into contact with the water film. The filter blocks impurities carried by the airflow, preventing contamination of the circulating water that forms the water film. However, after prolonged use, impurities accumulate on the filter. Currently, the filter is cleaned manually, which, while providing the best cleaning results, is time-consuming, labor-intensive, and inefficient, requiring the equipment to be shut down for extended periods.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] To address the aforementioned shortcomings, the purpose of this invention is to provide a cold-air evaporator that can: 1. The filter screen is cleaned by reverse airflow driven by the diversion fan, eliminating the need for manual disassembly and improving cleaning efficiency; 2. The water curtain's changing state helps to guide airflow and optimize the airflow cleaning process.

[0007] To achieve the above objectives, this utility model provides a cold air evaporator, comprising: a shell; a fan installed at the bottom of the shell; a first airflow channel disposed on the side wall of the fan; a filter screen disposed on the shell corresponding to the airflow channel; a water curtain installed on the inner wall of the shell and corresponding to the airflow channel; a heat exchange tube assembly installed on the side where the airflow from the fan exits, with a heat exchange medium flowing inside; the top of the water curtain is hinged to the inner wall of the shell; a water inlet is disposed on the shell at the upper position of the water curtain; a water outlet is disposed on the shell at the upper position of the water curtain; during cleaning, the water curtain rotates around the hinge point and is set at an angle to the inside of the shell, forming a second airflow channel between them; the fan drives the airflow to diffuse from the inside of the shell through the filter screen to the outside.

[0008] According to the cold air evaporator of this utility model, a water flow disperser is provided between the water inlet and the water curtain; the water flow disperser includes a narrow opening and a wide opening that are interconnected; the narrow opening is connected to the water inlet and the wide opening is connected to the water curtain; the wide opening has several dispersing channels.

[0009] According to the present invention, a plurality of guide plates are provided inside the wide opening, and the guide plates extend from the narrow opening into the wide opening at a predetermined angle.

[0010] According to the present invention, the cold air evaporator is driven by a drive structure to switch angles; the drive structure includes a winder installed on the top of the housing and a pull rope wound on the winder; the end of the pull rope is connected to a predetermined position in the middle of the water curtain or away from the hinge end.

[0011] According to the present invention, the cold air evaporator has a square shell with water curtains installed inside all four side walls; during cleaning, the water curtains on opposite sides switch angles.

[0012] According to the present invention, a drive motor is installed on the top of the housing, and its output end is connected to the exhaust fan through a transmission shaft.

[0013] According to the present invention, the bottom of the water curtain has an obstacle avoidance groove that can accommodate the drive shaft.

[0014] According to the cold air evaporator of this utility model, the water inlets of the corresponding multiple water curtains are connected to a pipe.

[0015] This utility model provides a cold air evaporator, comprising: a shell, which is square and includes four side wall working surfaces and a bottom working surface; a fan installed at the bottom of the shell, capable of generating positive or negative pressure changes in the internal space of the shell, thereby affecting the external airflow flowing out or into the shell; a first airflow channel disposed on the side wall of the fan; a filter screen disposed on the shell corresponding to the airflow channel; it is understood that the first airflow channel is constructed by the filter holes of the filter screen. A water curtain is installed on the inner wall of the shell and corresponds to the airflow channel; the top of the water curtain is hinged to the inner wall of the shell, and the water curtain can switch between cooling and cleaning states by changing its angle; a water inlet is disposed on the shell at the upper part of the water curtain, and the water inlets corresponding to multiple water curtains are connected to a pipe; a water outlet is disposed on the shell at the upper part of the water curtain; water flows into the device through the water inlet and disperses on the water curtain to form a water film, and after passing through the water curtain, the water film gathers at the bottom of the water curtain and flows out of the device through the water outlet. When the equipment is cooling, the exhaust fan rotates in the forward direction, creating a negative pressure inside the casing. External airflow enters the casing through the first airflow channel, passing through the water film of the water curtain. The airflow passing through the water film cools from a high temperature to a low temperature (this is because the water film is thin and has a large contact area with the air, making evaporation very easy and carrying away heat). The cooled airflow then further passes through the exhaust fan into the delivery pipe. During cleaning, the water supply is stopped. The water curtain rotates around the hinge point and is set at an angle to the inside of the casing, forming a second airflow channel. The exhaust fan rotates in the reverse direction, driving the airflow from inside the casing through the filter screen to the outside. At this angle, the water curtain itself has gaps that prevent airflow from passing through, thus acting as an airflow barrier. The reverse rotation of the exhaust fan creates positive pressure inside the casing, causing the airflow to diffuse outward and blowing away impurities attached to the filter screen pores. In this state, the water curtain effectively guides the airflow, stabilizing the airflow direction and ensuring efficient cleaning.

[0016] This utility model can: The filter screen is cleaned by a reverse airflow driven by a diversion fan, eliminating the need for manual disassembly and improving cleaning efficiency. 2. The water curtain's changing state helps to guide airflow and optimize the airflow cleaning process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the water curtain of this utility model in its cooling state; Figure 4 This is a schematic diagram of the water curtain of this utility model in the cleaning state; Figure 5 This is a structural diagram of the water curtain and water flow diffuser; In the diagram, 1-shell, 2-drainage fan, 3-filter screen, 4-water curtain, 5-water flow diffuser, 51-narrow opening, 52-wide opening, 53-guide plate, 6-pull rope, 7-winder, 8-drive shaft, 9-obstacle avoidance groove, 10-pipe, 21-heat exchange tube. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0019] See Figure 1 , Figure 2 , Figure 3 and Figure 4 This utility model provides a cold air evaporator, which includes: Shell 1 is a square shell, including four side wall working surfaces and one bottom working surface; The exhaust fan 2 is installed at the bottom of the housing and can generate positive or negative pressure changes in the internal space of the housing 1, thereby affecting the external airflow. The airflow flows out of or into the housing 1. The first airflow channel is located on the side wall of the airflow fan 2; a filter screen 3 is provided on the housing 1 corresponding to the airflow channel; it can be understood that the first airflow channel is constructed by the filter holes of the filter screen 3.

[0020] Water curtain 4 is installed on the inner wall of housing 1 and corresponds to the airflow channel; the top of water curtain 4 is hinged to the inner wall of housing 1, and water curtain 4 can switch between cooling state and cleaning state by changing the angle; The heat exchange tube assembly is installed on the side where the airflow of the exhaust fan exits; the heat exchange tube assembly contains a heat exchange medium and is connected to other components, such as heat exchange components like air conditioners, through pipes. A water inlet is provided on the housing 1 at the upper part of the water curtain 4, and the water inlets of the multiple water curtains 4 are connected to a pipe 10. A water outlet is provided on the housing 1 at the upper part of the water curtain 4. Water flows into the equipment through the water inlet and disperses on the water curtain 4 to form a water film. After passing through the water curtain 4, the water film gathers at the bottom of the water curtain 4 and flows out of the equipment through the water outlet.

[0021] When the equipment is in cooling mode, the exhaust fan 2 rotates in the forward direction and forms a negative pressure inside the housing 1. The external airflow enters the housing 1 through the first airflow channel. During the entry process, it passes through the water film of the water curtain 4. The airflow passing through the water film will decrease from high temperature to low temperature (this is because the water film is thin and has a large contact area with the air, making it very easy to produce evaporation, which will take away heat during the evaporation process). The cold airflow then further contacts the heat exchange tube group through the exhaust fan 2 and exchanges heat with it. The airflow in the heat exchange tube group enters a low temperature state.

[0022] During cleaning, the water supply is stopped. The water curtain 4 rotates around the hinge point and is set at an angle to the inside of the housing 1, forming a second airflow channel between them. The guide fan 2 rotates in the opposite direction and drives the airflow from the inside of the housing 1 through the filter screen 3 to the outside. At this time, the water curtain 4, due to its own gaps at the aforementioned angle, makes it difficult for airflow to pass through, thus acting as an airflow barrier. The reverse rotation of the guide fan 2 can create positive pressure inside the housing 1, causing the airflow to diffuse outward and blowing away impurities attached to the filter pores of the filter screen 3. The water curtain 4 in this state can guide the flow, stabilize the airflow direction, and ensure the high efficiency of the cleaning operation.

[0023] See Figure 3 and Figure 5 Preferably, to ensure the dispersion effect of the water flow after it enters the device through the water inlet, this application provides a water flow disperser 5 between the water inlet and the water curtain 4. The water flow disperser 5 includes a narrow opening 51 and a wide opening 52 that are interconnected. The narrow opening 51 is connected to the water inlet, and the wide opening 52 is connected to the water curtain 4. The wide opening 52 has several dispersion channels. The collected water flow is dispersed through these channels, thereby forming a water film in conjunction with the water curtain 4. These dispersion channels are spaced apart by several guide plates 53 disposed inside the wide opening 52, which extend from the narrow opening 51 into the wide opening 52 at a predetermined angle.

[0024] The water curtain 4 is driven by a drive structure to switch angles; the drive structure includes a winder 7 mounted on the top of the housing 1 and a pull rope 6 wound on the winder 7; the end of the pull rope 6 is connected to a predetermined position in the middle of the water curtain 4 or away from the hinge end. When the water curtain 4 switches states, specifically from a cooling state to a cleaning state, the winder 7 rotates to collect the pull rope 6 and generates a pulling effect on the water curtain 4, causing it to switch states. When the water curtain 4 resets, the winder 7 only needs to reverse, and the water curtain 4 resets under its own gravity.

[0025] The housing 1 is a square shell, and water curtains 4 are installed inside the four side walls. During the cleaning process, the water curtains 4 on opposite sides form a group and switch angles. After one group is cleaned, the next group is cleaned to avoid interference between the water curtains 4.

[0026] In addition, a drive motor is installed on the top of the housing 1 of this invention, and its output end is connected to the drainage fan 2 via a transmission shaft 8. The bottom of the water curtain 4 has an obstacle avoidance groove 9 that can accommodate the transmission shaft 8.

[0027] In summary, this utility model provides a cold air evaporator, comprising: a shell, which is a square shell including four side wall working surfaces and a bottom working surface; a fan installed at the bottom of the shell, capable of generating positive or negative pressure changes in the internal space of the shell, thereby affecting the external airflow flowing out or into the shell; a first airflow channel disposed on the side wall of the fan; a filter screen disposed on the shell corresponding to the airflow channel; it is understood that the first airflow channel is constructed by the filter holes of the filter screen. A water curtain is installed on the inner wall of the shell and corresponds to the airflow channel; the top of the water curtain is hinged to the inner wall of the shell, and the water curtain can switch between cooling and cleaning states by changing its angle; a water inlet is disposed on the shell at the upper part of the water curtain, and the water inlets corresponding to multiple water curtains are connected to a pipe; a water outlet is disposed on the shell at the upper part of the water curtain; water flows into the device through the water inlet and disperses on the water curtain to form a water film, and after passing through the water curtain, the water film gathers at the bottom of the water curtain and flows out of the device through the water outlet. When the equipment is cooling, the exhaust fan rotates in the forward direction, creating a negative pressure inside the casing. External airflow enters the casing through the first airflow channel, passing through the water film of the water curtain. The airflow passing through the water film cools from a high temperature to a low temperature (this is because the water film is thin and has a large contact area with the air, making evaporation very easy and carrying away heat). The cooled airflow then further passes through the exhaust fan into the delivery pipe. During cleaning, the water supply is stopped. The water curtain rotates around the hinge point and is set at an angle to the inside of the casing, forming a second airflow channel. The exhaust fan rotates in the reverse direction, driving the airflow from inside the casing through the filter screen to the outside. At this angle, the water curtain itself has gaps that prevent airflow from passing through, thus acting as an airflow barrier. The reverse rotation of the exhaust fan creates positive pressure inside the casing, causing the airflow to diffuse outward and blowing away impurities attached to the filter screen pores. In this state, the water curtain effectively guides the airflow, stabilizing the airflow direction and ensuring efficient cleaning.

[0028] This utility model can: 1. The filter screen is cleaned by reverse airflow driven by the diversion fan, eliminating the need for manual disassembly and improving cleaning efficiency; 2. The water curtain's changing state helps to guide airflow and optimize the airflow cleaning process.

[0029] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A cold-air evaporator, characterized in that, include: case; The exhaust fan is installed at the bottom of the housing; The first airflow channel is located on the side wall of the exhaust fan; a filter screen is provided on the housing corresponding to the airflow channel. A water curtain is installed on the inner wall of the housing and corresponds to the airflow channel; the top of the water curtain is hinged to the inner wall of the housing. A water inlet is provided on the upper part of the housing of the water curtain; a water outlet is provided on the upper part of the housing of the water curtain. The heat exchanger tube assembly is installed on the side where the airflow of the exhaust fan flows out, and a heat exchange medium flows inside it. During the cleaning process, the water curtain rotates around the hinge point and is set at an angle to the inside of the housing, forming a second airflow channel between them; the guide fan drives the airflow from the inside of the housing through the filter screen to diffuse to the outside.

2. The cold air evaporator according to claim 1, characterized in that, A water flow disperser is installed between the water inlet and the water curtain; The water flow disperser includes a narrow opening and a wide opening that are interconnected; the narrow opening is connected to the water inlet and the wide opening is connected to the water curtain. The wide opening contains several dispersed channels.

3. The cold air evaporator according to claim 2, characterized in that, The wide opening is provided with several guide plates, which extend from the narrow opening into the wide opening at a predetermined angle.

4. The cold air evaporator according to claim 1, characterized in that, The water curtain is driven by a driving structure to switch angles; The drive structure includes a winder mounted on the top of the housing and a pull rope wound on the winder; the end of the pull rope is connected to a predetermined position in the middle of the water curtain or away from the hinged end.

5. The cold-air evaporator according to claim 1 or 4, characterized in that, The shell is a square outer shell, and water curtains are installed inside all four side walls. During cleaning, the water curtains on opposite sides switch angles.

6. The cold air evaporator according to claim 1, characterized in that, A drive motor is installed on the top of the housing, and its output end is connected to the exhaust fan via a transmission shaft.

7. The cold air evaporator according to claim 6, characterized in that, The bottom of the water curtain has an obstacle avoidance groove that can accommodate the drive shaft.

8. The cold air evaporator according to claim 1, characterized in that, The water inlets of the multiple water curtains are all connected to a single pipe.

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