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

Abstract

The air cooler equipment comprises an air cooler main body, an evaporator, fins and a fan main body, the fan main body is arranged on one side in the air cooler main body, the evaporator is arranged on the side, away from the fan main body, in the air cooler main body, the fins are arranged on the evaporator, and the fan main body is arranged in the air cooler main body. An air pressure difference switch is arranged on the portion, on one side of the fin, of the evaporator, 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] The invention relates to the technical field of air coolers, and in particular to an air cooler device with on-demand defrosting control based on pressure difference sensing. Background Art

[0002] An air cooler, also known as an environmentally friendly air conditioner, a water-cooled air conditioner or an evaporative air cooler, is a device that uses the principle of heat absorption by water evaporation to lower the air temperature. When the air cooler is running, the refrigerant inside it evaporates in the evaporator (usually including fins), absorbing heat from the surrounding air, thereby lowering the air temperature. If the air temperature is lower than the dew point temperature (that is, the temperature at which water vapor in the air begins to condense), frost may form on the surface of the fins. At present, there are many defrosting methods for air coolers on the market, including water defrosting, electric defrosting, hot air defrosting, or a combination of the above defrosting 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] Since the frost forming speed of the air cooler is different in different seasons, time periods and installation locations, the traditional timed defrosting has the following problems. First, it is impossible to know when to start defrosting without knowing the thickness of the frost layer. Second, there is the phenomenon of excessive defrosting or insufficient defrosting. Excessive defrosting will increase the additional heat load of the warehouse due to thermal radiation and thermal convection, and the excess high-pressure hot air may flow into the low-pressure side, increasing the load of the unit. For electric defrosting and water defrosting systems, excessive defrosting will also cause waste of electricity and water resources. When the defrost is insufficient, ice will accumulate and become thicker and thicker, resulting in increased wind resistance, reduced heat transfer efficiency of the heat exchange tube, and reduced performance of the air cooler. Therefore, a air cooler device with on-demand defrosting control based on pressure difference sensing is needed. Summary of the invention

[0004] The object of the present invention is to provide a cold air blower device with on-demand defrost control based on pressure difference sensing to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an air cooler device with on-demand defrost control based on pressure difference sensing, comprising an air cooler body, an evaporator, fins and a fan body, a fan body being arranged on one side inside the air cooler body, and an evaporator being arranged on the side inside the air cooler body away from the fan body, a fin being arranged on the evaporator, an air pressure difference switch being arranged on the evaporator on one side of the fin, and a first pressure taking port and a second pressure taking port being arranged on the air pressure difference switch through a first pressure taking pipe and a second pressure taking pipe, respectively, the first pressure taking port and the second pressure taking port being arranged on both sides of the fin, respectively, and an electric heating pipe being arranged in the air cooler body on one side of the fin.

[0006] As a further improvement of the present invention, mounting frames are respectively provided at both ends of the top of the air cooler body, and mounting holes are provided on the mounting frames.

[0007] As a further improvement of the present invention, a coil is provided on the evaporator on one side of the fin, and a liquid inlet and a liquid outlet are respectively provided at both ends of the coil.

[0008] As a further improvement of the present invention, a frame is provided on the outside of the fan body, and connecting pieces are evenly provided on the outside of the frame, and one end of the connecting pieces is fixedly connected to the outer shell of the air cooler body through a mounting plate.

[0009] As a further improvement of the present invention, main fan blades are evenly distributed on the outer side of the fan body, and ribs are arranged on the main fan blades.

[0010] As a further improvement of the present invention, auxiliary blades are evenly arranged at a central position on one side of the fan body, and the main blades and the auxiliary blades rotate in the same direction.

[0011] As a further improvement of the present invention, the main fan blades and the auxiliary fan blades are each provided with 8 groups, and air ducts are formed between the auxiliary fan blades.

[0012] As a further improvement of the present invention, three groups of ribs are provided on the main wind blades, and the ribs gradually increase in size along the extension direction of the main wind blades.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the air cooler device with on-demand defrost control based on pressure differential sensing is equipped with an air cooler body, an evaporator, a fan body, fins, a heating pipe, an air pressure differential switch, a first pressure taking pipe, a second pressure taking pipe, a first pressure taking port and a second pressure taking port. By respectively installing the first pressure taking pipe and the second pressure taking pipe between the fins on the air inlet and outlet sides of the air cooler body, the air pressure differential between the air inlet and the air supply port of the air cooler body will change during operation. When frost forms on the evaporator surface, the frost layer will block the air flow channel, resulting in a decrease in the air pressure differential between the fins on the air inlet and outlet sides of the air cooler body. When the air pressure differential monitored by the air pressure differential switch is less than a preset pressure differential threshold, it is considered that the evaporator surface of the air cooler body has been frosted, and then the control system will issue an instruction to start the electric heating pipe for defrosting. This scheme overcomes the shortcomings of the prior art and provides a control method with scientific design, easy use and on-demand defrosting. The system can start the defrost program at any desired set frost layer thickness to avoid excessive air supply defrosting and insufficient defrosting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the top cross-sectional structure of the present invention.

[0017] Figure 3 It is a schematic diagram of the fin structure of the present invention.

[0018] Figure 4 It is a schematic diagram of the framework structure of the present invention.

[0019] Figure 5 It is a schematic diagram of the fan main body structure of the present invention.

[0020] In the figure: 1. air cooler body; 2. mounting frame; 3. evaporator; 4. air pressure difference switch; 5. first pressure pipe; 6. second pressure pipe; 7. second pressure port; 8. fin; 9. first pressure port; 10. electric heating tube; 11. frame; 12. fan body; 13. connector; 14. mounting plate; 15. main fan blade; 16. rib; 17. coil; 18. auxiliary fan blade; 19. air duct; 20. liquid inlet; 21. liquid outlet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-5, an embodiment of the present invention is provided: a cold air machine device based on pressure difference sensing on-demand defrost control, comprising a cold air machine body 1, an evaporator 3, fins 8 and a fan body 12, wherein mounting frames 2 are respectively arranged at both ends of the top of the cold air machine body 1, and mounting holes are opened on the mounting frames 2 for mounting and fixing the cold air machine body 1; a fan body 12 is arranged on one side inside the cold air machine body 1, and an evaporator 3 is arranged on the side of the cold air machine body 1 away from the fan body 12, and the evaporator 3 is arranged on the evaporator 3; a coil 17 is arranged on the evaporator 3 on one side of the fin 8, and a liquid inlet 20 and a liquid outlet 21 are respectively arranged at both ends of the coil 17; a refrigerant is introduced into the coil 17 through the liquid inlet 20, and the refrigerant absorbs heat in the air when evaporating in the coil 17, thereby reducing the air temperature, and increases the heat exchange surface area through the fins 8, thereby accelerating the contact area between the cold and hot air or the refrigerant, and improving the heat transfer speed, and blowing out cold air in conjunction with the rotation of the fan body 12 to reduce the ambient temperature.

[0023] Main blades 15 are evenly distributed on the outside of the fan body 12. The main blades 15 rotate when the fan body 12 is running. Ribs 16 are provided on the main blades 15. There are three groups of ribs 16 on the main blades 15, and the ribs 16 gradually increase along the extension direction of the main blades 15, which is beneficial to generate surrounding airflow when the main blades 15 rotate, thereby reducing noise; auxiliary blades 18 are evenly provided at the central position of one side of the fan body 12, and the main blades 15 and the auxiliary blades 18 rotate in the same direction. There are 8 groups of main blades 15 and auxiliary blades 18, and air ducts 19 are formed between the auxiliary blades 18.

[0024] The airflow generated by the auxiliary blades 18 flows along the air duct 19 to the main blades 15 and moves together with the airflow generated by the main blades 15, thereby increasing the wind force of the fan body 12, which is beneficial to improving the cooling effect; a frame 11 is provided on the outside of the fan body 12, and connecting parts 13 are evenly provided on the outside of the frame 11, and one end of the connecting parts 13 is fixedly connected to the outer shell of the air cooler body 1 through a mounting plate 14, which can prevent external objects from directly contacting the fan body 12 to 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 the air pressure differential switch 4 is provided with a first pressure port 7 and a second pressure port 9 through a first pressure taking pipe 5 and a second pressure taking pipe 6, respectively, the first pressure port 7 and the second pressure taking port 9 are respectively arranged on both sides of the fin 8, and an electric heating pipe 10 is arranged in the air cooler body 1 on one side of the fin 8.

[0025] The first pressure port 7 and the second pressure port 9 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 the air inlet and the air supply port will change. When frost forms on the surface of the evaporator 3, the frost layer will block the air flow channel, causing the air pressure difference between the fins 8 on the air inlet and outlet sides of the air cooler body 1 to decrease; 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, and then the control system will issue an instruction to start the electric heating tube 10 to heat and defrost.

[0026] The present solution controls the defrost program by combining the pressure difference change between the first pressure taking pipe 5 and the second pressure taking pipe 6 with the pressure difference setting value and the action of the air pressure difference switch 4, thereby overcoming the shortcomings of the prior art and providing a control method that is scientifically designed, easy to use, and can defrost on demand. The system can start the defrost program at any desired set frost layer thickness to avoid excessive air supply defrosting and insufficient defrosting. The specific model specifications of the air pressure difference switch 4 and the electric heating tube 10 need to be determined by selection calculation based on the specification parameters of the device. The selection calculation method is a prior art, so it will not be described in detail.

[0027] The working principle of this equipment is as follows: the refrigerant is introduced into the coil 17 through the liquid inlet 20. When the refrigerant evaporates in the coil 17, it absorbs heat in the air, thereby reducing the air temperature, and increases the heat exchange surface area through the fins 8, thereby accelerating the contact area between the cold and hot air or the refrigerant, and increasing the heat transfer speed. The rotation of the fan body 12 blows out cold air to reduce the ambient temperature. When the fan body 12 is running, the main blades 15 and the auxiliary blades 18 rotate together. The airflow generated by the auxiliary blades 18 flows along the air duct 19 to the main blades 15 and moves together with the airflow generated by the main blades 15, thereby increasing the wind force of the fan body 12, which is beneficial to improving the cooling effect.

[0028] An air pressure difference switch 4 is provided on one side of the evaporator 3. The first pressure-taking tube 5 on the air pressure difference switch 4 and the first pressure-taking port 7 and the second pressure-taking port 9 on the second pressure-taking tube 6 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 supply port will change. When frost forms on the surface of the evaporator 3, the frost layer will block the air flow 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 monitored by the air pressure difference switch 4 is less than a preset pressure difference threshold, it is considered that frosting has formed on the surface of the evaporator 3 of the air cooler body 1. Then the control system will issue an instruction to start the electric heating tube 10 for heating and defrosting. This solution overcomes the shortcomings of the prior art and provides a control method that is scientifically designed, easy to use, and can defrost on demand. The system can start the defrost program at any desired set frost layer thickness to avoid excessive air supply defrosting and insufficient defrosting.

Claims

1. A cooling air machine device based on pressure difference sensing and on-demand defrost control, characterized in that: The invention comprises an air cooler body (1), an evaporator (3), a fin (8) and a fan body (12); the fan body (12) is arranged on one side of the air cooler body (1); the evaporator (3) is arranged on the side of the air cooler body (1) away from the fan body (12); the evaporator (3) is arranged on the evaporator (3); an air pressure difference switch (4) is arranged on the evaporator (3) on one side of the fin (8); the air pressure difference switch (4) is provided with a first pressure taking port (7) and a second pressure taking port (9) through a first pressure taking pipe (5) and a second pressure taking pipe (6), respectively; the first pressure taking port (7) and the second pressure taking port (9) are arranged on both sides of the fin (8), respectively; and an electric heating pipe (10) is arranged in the air cooler body (1) on one side of the fin (8).

2. The air cooler device according to claim 1, characterized in that: Mounting frames (2) are respectively provided at both ends of the top of the air cooler body (1), and mounting holes are provided on the mounting frames (2).

3. The air cooler device according to claim 1, characterized in that: A coil (17) is provided on the evaporator (3) on one side of the fin (8), and a liquid inlet (20) and a liquid outlet (21) are respectively provided at two ends of the coil (17).

4. The air cooler device according to claim 1, characterized in that: A frame (11) is arranged on the outside of the fan body (12), and connecting pieces (13) are evenly arranged on the outside of the frame (11), and one end of each connecting piece (13) is fixedly connected to the outer shell of the air cooler body (1) via a mounting plate (14).

5. The air cooler device according to claim 1, characterized in that: Main fan blades (15) are evenly distributed on the outside of the fan body (12), and ribs (16) are provided on the main fan blades (15).

6. The air cooler device according to claim 5, characterized in that: Auxiliary blades (18) are evenly arranged at the central position of one side of the fan body (12), and the main blades (15) and the auxiliary blades (18) rotate in the same direction.

7. The air cooler device according to claim 6, characterized in that: The main fan blades (15) and the auxiliary fan blades (18) are each provided in eight groups, and air ducts (19) are formed between the auxiliary fan blades (18).

8. The air cooler device according to claim 5, characterized in that: The ribs (16) on the main fan blade (15) are each provided with three groups, and the ribs (16) gradually increase in size along the extension direction of the main fan blade (15).

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