Air cooler equipment based on differential pressure induction on-demand defrosting control

Abstract

The air cooler equipment comprises an air cooler body, an evaporator, fins and a fan body, the fan body is arranged on one side of the interior of the air cooler body, the evaporator is arranged on the side, away from the fan body, of the interior of the air cooler body, and the fins are arranged on the evaporator. A fin is arranged on the evaporator, an air pressure difference switch is arranged on the evaporator on one side of the fin, a first pressure tapping opening and a second pressure tapping opening are formed in the air pressure difference switch through a first pressure tapping pipe and a second pressure tapping pipe respectively, and the first pressure tapping opening and the second pressure tapping opening are formed in the two sides of the fin respectively. By installing the air cooler body, the evaporator, the fan body, the fins, the heating pipe, the air pressure difference switch, the first pressure tapping pipe, the second pressure tapping pipe, the first pressure tapping opening and the second pressure tapping opening, the defects in the prior art are overcome, and a control mode which is scientific in design, convenient to use and capable of defrosting according to needs is provided.

Description

Technical Field

[0001] This utility model relates to the field of air cooler technology, specifically to an air cooler device based on differential pressure sensing and on-demand defrosting control. Background Technology

[0002] Evaporative air coolers, also known as eco-friendly air conditioners, water-cooled air conditioners, or evaporative air coolers, are devices that use the principle of water evaporation to absorb heat and lower the air temperature. When the evaporative air cooler is running, the refrigerant inside evaporates in the evaporator (usually containing fins), absorbing heat from the surrounding air and thus lowering the air temperature. If the air temperature is lower than the dew point temperature (the temperature at which water vapor in the air begins to condense), frost may form on the surface of the fins. Currently, there are various defrosting methods for evaporative air coolers on the market, including water defrosting, electric defrosting, hot air defrosting, or a combination of the above methods. Regardless of the defrosting method used, most of them control the start and end of defrosting according to time, which is the traditional timed defrosting.

[0003] Because the frosting rate of evaporative air coolers varies depending on the season, time of day, and installation location, traditional timed defrosting methods have several problems. First, the appropriate time to start defrosting cannot be determined by knowing the frost thickness. Second, there are instances of over-defrosting or under-defrosting. Over-defrosting increases the additional heat load on the warehouse due to heat radiation and convection, and excess high-pressure hot air may seep into the low-pressure side, increasing the unit load. For electric defrosting and water defrosting systems, over-defrosting also wastes electricity and water resources. On the other hand, under-defrosting leads to ice accumulation, which becomes thicker and thicker, increasing air resistance, reducing the heat transfer efficiency of heat exchange tubes, and lowering the performance of the evaporative air cooler. Therefore, there is a need for an evaporative air cooler device that uses differential pressure sensing for on-demand defrosting control. Utility Model Content

[0004] The purpose of this invention is to provide a cold air blower device based on differential pressure sensing and on-demand defrosting control, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cold air blower device based on differential pressure sensing for on-demand defrosting control, comprising a cold air blower body, an evaporator, fins, and a fan body. The fan body is located on one side of the interior of the cold air blower body, and the evaporator is located on the side of the interior of the cold air blower body away from the fan body. Fins are provided on the evaporator. An air differential pressure switch is provided on the evaporator on one side of the fins. The air differential pressure switch is provided with a first pressure tap and a second pressure tap through a first pressure tap and a second pressure tap, respectively. The first pressure tap and the second pressure tap are respectively located on both sides of the fins. An electric heating element is provided inside the cold air blower body on one side of the fins.

[0006] As a further improvement of this utility model, mounting brackets are respectively provided at both ends of the top sides of the air cooler body, and mounting holes are provided on each mounting bracket.

[0007] As a further improvement of this utility model, a coil is provided on the evaporator on one side of the fins, and an inlet and an outlet are respectively provided at both ends of the coil.

[0008] As a further improvement of this utility model, a frame is provided on the outer side of the fan body, and connectors are evenly provided on the outer side of the frame. One end of each connector is fixedly connected to the outer shell of the air cooler body through a mounting plate.

[0009] As a further improvement of this utility model, the main fan blades are evenly distributed on the outer side of the fan body, and each of the main fan blades is provided with ribs.

[0010] As a further improvement of this utility model, secondary fan blades are evenly arranged at the center of one side of the fan body, and the main fan blades and secondary fan blades rotate in the same direction.

[0011] As a further improvement of this utility model, both the main fan blade and the auxiliary fan blade are provided with 8 sets, and air ducts are formed between the auxiliary fan blades.

[0012] As a further improvement of this utility model, the main fan blade is provided with 3 sets of ribs, and the ribs gradually increase in size along the extension direction of the main fan blade.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This air cooler device based on differential pressure sensing and on-demand defrosting control consists of an air cooler body, an evaporator, a fan body, fins, a heating element, an air differential pressure switch, a first pressure tap, a second pressure tap, a first pressure port, and a second pressure port. By installing the first and second pressure taps between the fins on the air inlet and outlet sides of the air cooler body, the air pressure difference between the air inlet and outlet changes during operation. When frost forms on the evaporator surface, the frost... The frost layer can block the airflow channel, causing a decrease in the air pressure difference between the fins on the air inlet and outlet sides of the evaporator body. When the air pressure difference detected by the air pressure difference switch is less than the preset pressure difference threshold, it is considered that the evaporator surface of the evaporator body has been frosted. Then the control system will issue a command to start the electric heating tube for defrosting. This solution overcomes the shortcomings of the existing technology and provides a scientifically designed, easy-to-use, on-demand defrosting control method. The system can start the defrosting program at any desired frost thickness, avoiding excessive air supply for defrosting and insufficient defrosting. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a top view cross-sectional structural diagram of the present invention.

[0017] Figure 3 This is a schematic diagram of the fin structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the frame structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the main structure of the fan of this utility model.

[0020] In the diagram: 1. Main body of the evaporative cooler; 2. Mounting bracket; 3. Evaporator; 4. Differential air pressure switch; 5. First pressure tap; 6. Second pressure tap; 7. Second pressure tap port; 8. Fins; 9. First pressure tap port; 10. Heating element; 11. Frame; 12. Fan body; 13. Connector; 14. Mounting plate; 15. Main fan blade; 16. Rib; 17. Coil; 18. Secondary fan blade; 19. Air duct; 20. Liquid inlet; 21. Liquid outlet. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figure 1-5This utility model provides an embodiment of a cold air blower device based on differential pressure sensing and on-demand defrosting control, comprising a cold air blower body 1, an evaporator 3, fins 8, and a fan body 12. Mounting brackets 2 are respectively provided at both ends of the top of the cold air blower body 1, and each mounting bracket 2 has mounting holes for mounting and fixing the cold air blower body 1. The fan body 12 is located on one side inside the cold air blower body 1, and the evaporator 3 is located on the side of the cold air blower body 1 away from the fan body 12. Fins 8 are provided on the evaporator 3. A coil 17 is provided on the evaporator 3 on one side of the fins 8, and liquid inlet 20 and liquid outlet 21 are respectively provided at both ends of the coil 17. Refrigerant is introduced into the coil 17 through the liquid inlet 20. When the refrigerant evaporates in the coil 17, it absorbs heat from the air, thereby lowering the air temperature. The fins 8 increase the heat exchange surface area, thereby accelerating the contact area between hot and cold air or refrigerant, increasing the heat transfer speed. Combined with the rotation of the fan body 12, it blows out cold air to lower the ambient temperature.

[0023] Main fan blades 15 are evenly distributed on the outer side of the fan body 12. When the fan body 12 is running, the main fan blades 15 rotate. Ribs 16 are provided on each main fan blade 15. There are 3 sets of ribs 16 on each main fan blade 15. The ribs 16 gradually increase in size along the extension direction of the main fan blade 15, which helps to generate a surrounding airflow when the main fan blade 15 rotates, thereby reducing noise. Auxiliary fan blades 18 are evenly distributed at the center of one side of the fan body 12. The main fan blades 15 and the auxiliary fan blades 18 rotate in the same direction. There are 8 sets of main fan blades 15 and auxiliary fan blades 18. Air ducts 19 are formed between the auxiliary fan blades 18.

[0024] The airflow generated by the auxiliary fan blade 18 flows along the air duct 19 to the main fan blade 15 and moves together with the airflow generated by the main fan blade 15, thereby increasing the wind force of the fan body 12 and improving the cooling effect. A frame 11 is provided on the outside of the fan body 12, and connectors 13 are evenly arranged on the outside of the frame 11. One end of each connector 13 is fixedly connected to the outer shell of the air cooler body 1 through the mounting plate 14, which can prevent external objects from directly contacting the fan body 12 and avoid damage or safety hazards. An air pressure differential switch 4 is provided on the evaporator 3 on one side of the fin 8, and a first pressure tap 7 and a second pressure tap 9 are provided on the air pressure differential switch 4 through the first pressure tap 5 and the second pressure tap 6, respectively. The first pressure tap 7 and the second pressure tap 9 are respectively located on both sides of the fin 8, and an electric heating tube 10 is provided inside the air cooler body 1 on one side of the fin 8.

[0025] The first pressure tap 7 and the second pressure tap 9 are respectively installed between the fins 8 on the air inlet and outlet sides of the air cooler body 1. During operation, the air pressure difference between the air inlet and outlet of the air cooler body 1 will change. When the surface of the evaporator 3 is frosted, the frost layer will block the airflow channel, resulting in a decrease in the air pressure difference between the fins 8 on the air inlet and outlet sides of the air cooler body 1. When the air pressure difference detected by the air pressure difference switch 4 is less than the preset pressure difference threshold, it is considered that the surface of the evaporator 3 of the air cooler body 1 has been frosted. Then the control system will issue a command to start the electric heating tube 10 to heat and defrost.

[0026] This solution controls the defrosting process by combining the pressure difference between the first pressure tapping tube 5 and the second pressure tapping tube 6 with the differential pressure setpoint and the activation of the air differential pressure switch 4. This overcomes the shortcomings of existing technologies and provides a scientifically designed, easy-to-use, on-demand defrosting control method. The system can initiate the defrosting process at any desired set frost thickness, avoiding over-supply defrosting and under-defrosting. The specific models and specifications of the air differential pressure switch 4 and the heating element 10 need to be determined by selection calculation based on the specifications and parameters of the device. The selection calculation method is existing technology and will not be described in detail here.

[0027] The working principle of this equipment is as follows: Refrigerant is introduced into coil 17 through liquid inlet 20. When the refrigerant evaporates in coil 17, it absorbs heat from the air, thereby lowering the air temperature. The heat exchange surface area is increased by fins 8, which accelerates the contact area between hot and cold air or refrigerant, improving the heat transfer speed. Combined with the rotation of the fan body 12, cold air is blown out, further lowering the ambient temperature. The main fan blade 15 and the auxiliary fan blade 18 of the fan body 12 rotate together. The airflow generated by the auxiliary fan blade 18 flows along the air duct 19 to the main fan blade 15 and moves together with the airflow generated by the main fan blade 15, thereby increasing the airflow of the fan body 12 and improving the cooling effect.

[0028] An air pressure differential switch 4 is provided on one side of the evaporator 3. The first pressure tap 5 and the first pressure tap 7 and the second pressure tap 9 on the second pressure tap 6 of the air pressure differential switch 4 are respectively installed between the fins 8 on the air inlet and outlet sides of the air cooler body 1. During the operation of the air cooler body 1, the air pressure difference between its air inlet and air outlet will change. When frost forms on the surface of the evaporator 3, the frost layer will block the airflow channel, resulting in a decrease in the air pressure difference between the fins 8 on the air inlet and outlet sides of the air cooler body 1. When the air pressure difference detected by the air pressure differential switch 4 is less than the preset pressure difference threshold, it is considered that the surface of the evaporator 3 of the air cooler body 1 has been frosted. Then the control system will issue a command to start the electric heating tube 10 to heat and defrost. This solution overcomes the shortcomings of the prior art and provides a scientifically designed, easy-to-use, and on-demand defrosting control method. The system can start the defrosting program at any desired frost thickness, avoiding excessive air supply for defrosting and insufficient defrosting.

Claims

1. A cold air machine apparatus based on differential pressure sensing on-demand defrosting control, characterized by, Including the cold air blower body (1), evaporimeter (3), fin (8) and fan body (12), the fan body (12) is arranged on one side of the inside of the cold air blower body (1), and the evaporimeter (3) is arranged on the side away from the fan body (12) of the inside of the cold air blower body (1), the evaporimeter (3) is provided with fin (8), the evaporimeter (3) on one side of fin (8) is provided with air pressure difference switch (4), and the air pressure difference switch (4) is respectively provided with first pressure tapping (7) and second pressure tapping (9) through first pressure tapping pipe (5) and second pressure tapping pipe (6), the first pressure tapping (7) and the second pressure tapping (9) are arranged on both sides of the fin (8), and the evaporimeter (3) on one side of the fin (8) is provided with electric heating tube (10) in the cold air blower body (1).

2. The refrigerating and air-conditioning equipment based on the pressure difference sensing and on-demand defrosting control according to claim 1, characterized in that: Both ends of the two sides of the top of the cold air blower body (1) are respectively provided with mounting bracket (2), and the mounting hole is formed in the mounting bracket (2).

3. The refrigeration equipment based on the pressure difference sensing and on-demand defrosting control according to claim 1, characterized in that: The evaporimeter (3) on one side of the fin (8) is provided with coil pipe (17), and the two ends of the coil pipe (17) are respectively provided with liquid inlet (20) and liquid outlet (21).

4. The refrigeration equipment based on the pressure difference sensing and on-demand defrosting control according to claim 1, characterized in that: The outer side of the fan body (12) is provided with frame (11), and the outer side of the frame (11) is uniformly provided with connecting piece (13), one end of the connecting piece (13) is fixedly connected with the outer shell of the cold air blower body (1) through mounting plate (14).

5. The refrigeration unit of claim 1, wherein: The outer side of the fan body (12) is uniformly distributed with main fan blade (15), and the main fan blade (15) is provided with rib (16).

6. A subcooling control based on differential pressure sensing for defrosting on demand of a cold air machine as claimed in claim 5 wherein: The central position of one side of the fan body (12) is uniformly provided with auxiliary fan blade (18), and the rotation direction of the main fan blade (15) and the auxiliary fan blade (18) is consistent.

7. A subcooling control based on differential pressure sensing for defrosting on demand of a cold air machine as claimed in claim 6 wherein: The main fan blade (15) and the auxiliary fan blade (18) are provided with 8 groups, and the auxiliary fan blade (18) forms air duct (19) between them.

8. A subcooling control based on differential pressure sensing for defrosting on demand of a cold air machine as claimed in claim 5 wherein: The rib (16) on the main fan blade (15) is provided with 3 groups, and the rib (16) gradually increases along the extension direction of the main fan blade (15).

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