Ventilation structure of a heat exchanger

Abstract

This utility model relates to the field of heat exchanger technology and discloses a ventilation structure for a heat exchanger, including a motor mounted on a bracket; a rotating shaft fixedly connected to the motor output shaft; a connecting rod located at the end of the rotating shaft away from the motor; a brush plate fixedly connected to the outer end of the connecting rod and slidably connected to the outer wall of a filter screen; and a differential pressure sensor mounted on the heat exchanger, with pressure taps located on both sides of the filter screen. Air is filtered by the filter screen before entering the heat exchanger. As air flows through the filter screen, the filter screen creates resistance to the airflow. The differential pressure sensor detects the pressure difference before and after the filter screen in real time and converts the physical pressure signal into an electrical signal, which is then output to the controller. When the pressure difference exceeds a clogging threshold, the filter screen is determined to be clogged. The controller then starts the motor, which drives the connecting rod and brush plate to rotate via the rotating shaft. The brush plate cleans the dust on the surface of the filter screen, thereby reducing clogging and preventing any impact on normal ventilation.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically to a ventilation structure for a heat exchanger. Background Technology

[0002] A heat exchanger is an energy-saving device that facilitates heat transfer between fluids at different temperatures. It allows heat to be transferred from a higher-temperature fluid to a lower-temperature fluid, thus meeting the needs of heating, cooling, and waste heat recovery in industrial processes. It has wide applications in numerous fields such as industrial production, HVAC, energy and power, chemical engineering, and refrigeration. From a working principle perspective, a heat exchanger utilizes the temperature difference between two or more fluids to achieve heat transfer through conduction, convection, and radiation. Its core principle is to enable efficient heat exchange between two fluids without direct mixing (except in special cases, such as direct-contact heat exchangers).

[0003] Existing heat exchangers have filters installed in the ventilation path to filter dust, particulate matter and other impurities in the air and prevent the heat exchange core from clogging. However, the filters are prone to clogging after long-term use, which affects the ventilation effect. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a ventilation structure for a heat exchanger that facilitates filter cleaning. This solves the problem that existing heat exchangers use filters in the ventilation path to filter dust, particulate matter, and other impurities in the air to prevent blockage of the heat exchange core, but these filters tend to become clogged after long-term use, affecting ventilation performance.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a ventilation structure for a heat exchanger, comprising a main component, wherein the main component includes:

[0008] A heat exchanger, on which a filter screen is installed;

[0009] A fan is installed on the rear side wall of the heat exchanger, and the fan input end is in communication with the heat exchanger.

[0010] A cleaning assembly is provided between the heat exchanger and the filter screen, the cleaning assembly comprising:

[0011] The bracket is fixedly connected to the outer wall of the heat exchanger;

[0012] The motor is mounted on the bracket;

[0013] The rotating shaft is fixedly connected to the output shaft of the motor;

[0014] A connecting rod is located at the end of the rotating shaft furthest from the motor;

[0015] A brush plate is fixedly connected to the outer end of the connecting rod, and the brush plate is slidably connected to the outer wall of the filter screen;

[0016] A differential pressure sensor is installed on the heat exchanger, and the pressure taps of the differential pressure sensor are located on both sides of the filter screen.

[0017] Preferably, a controller is provided on the outer wall of the heat exchanger, and the controller is electrically connected to the differential pressure sensor, the motor, the heat exchanger and the filter.

[0018] Preferably, the heat exchanger and the filter screen are provided with a disassembly assembly, the disassembly assembly comprising:

[0019] A chute is formed on the outer wall of the heat exchanger, and the filter screen is slidably connected to the chute;

[0020] Screw holes are symmetrically formed on the heat exchanger and the filter screen;

[0021] One bolt is symmetrically and threadedly connected to the screw hole.

[0022] Preferably, a handle is fixedly connected to the outer wall of the filter screen, and the handle is slidably connected to a groove opened on the heat exchanger.

[0023] Preferably, the heat exchanger has a through groove on its front side wall, and the through groove is located below the filter screen.

[0024] Preferably, the rotating shaft has a groove, and a connecting block is fixedly connected to one end of the connecting rod near the rotating shaft. Two bolts are threadedly connected to the rotating shaft and the connecting block.

[0025] (III) Beneficial Effects

[0026] Compared with the prior art, the present invention provides a ventilation structure for a heat exchanger, which has the following beneficial effects:

[0027] This ventilation structure offers the advantage of easy filter cleaning. Air is filtered before entering the heat exchanger. As air flows through the filter, it creates resistance. A differential pressure sensor continuously monitors the pressure difference before and after the filter, converting the physical pressure signal into an electrical signal and outputting it to the controller. When the pressure difference exceeds the clogging threshold, the filter is considered clogged. The controller then starts the motor, which drives the connecting rod and brush plates via a shaft. The brush plates clean the dust from the filter surface, reducing clogging and preventing disruption to ventilation. This design solves the problem of existing heat exchangers that use filters in the ventilation path to remove dust, particulate matter, and other impurities, preventing blockage of the heat exchange core. However, these filters tend to clog over time, affecting ventilation efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0030] Figure 3 This is a schematic diagram of the filter screen removal structure in this utility model;

[0031] Figure 4 This is a top view cross-sectional diagram of the chute structure in this utility model;

[0032] Figure 5 This is a schematic diagram of the brush plate removal structure in this utility model.

[0033] In the picture:

[0034] 1. Main components; 11. Heat exchanger; 12. Filter screen; 13. Fan;

[0035] 2. Cleaning components; 21. Bracket; 22. Motor; 23. Shaft; 24. Connecting rod; 25. Brush plate; 26. Differential pressure sensor;

[0036] 3. Disassembly components; 31. Slide groove; 32. Screw hole; 33. Bolt 1; 34. Handle; 4. Controller; 5. Through groove; 6. Connecting block; 61. Bolt 2. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Example 1

[0039] See Figure 1-5A ventilation structure for a heat exchanger includes a main component 1, comprising: a heat exchanger 11 on which a filter screen 12 is disposed; a fan 13 disposed on the rear side wall of the heat exchanger 11, the input end of the fan 13 communicating with the heat exchanger 11; a cleaning component 2 disposed on the heat exchanger 11 and the filter screen 12, the cleaning component 2 comprising: a bracket 21 fixedly connected to the outer side wall of the heat exchanger 11; a motor 22 disposed on the bracket 21; a rotating shaft 23 fixedly connected to the output shaft of the motor 22; a connecting rod 24 disposed at the end of the rotating shaft 23 away from the motor 22; a brush plate 25 fixedly connected to the outer end of the connecting rod 24, the brush plate 25 slidably connected to the outer side wall of the filter screen 12; and a differential pressure sensor 26 disposed on the heat exchanger 11, the pressure points of the differential pressure sensor 26 being located on both sides of the filter screen 12. A controller 4 is provided on the outer wall of the heat exchanger 11. The controller 4 is electrically connected to the differential pressure sensor 26, the motor 22, the heat exchanger 11, and the filter screen 12. A disassembly assembly 3 is provided on the heat exchanger 11 and the filter screen 12. The disassembly assembly 3 includes: a sliding groove 31, which is formed on the outer wall of the heat exchanger 11, and the filter screen 12 is slidably connected to the sliding groove 31; screw holes 32, which are symmetrically formed on the heat exchanger 11 and the filter screen 12; and bolts 33, which are symmetrically threaded onto the screw holes 32.

[0040] In operation, the heat exchanger 11 contains a liquid, such as refrigerant, flowing through its internal metal tubes. Dense fins are installed on the outside of the tubes, and a fan 13 provides forced ventilation. High-temperature, high-pressure refrigerant gas discharged from the compressor enters the finned tubes and flows along the pipes. The fan 13 drives outdoor air to flow laterally across the fin surface, creating forced convection. The refrigerant releases heat and condenses into a liquid inside the tubes; this heat is transferred to the air through the tube walls and fins, causing the air temperature to rise before it is discharged from the fan 13 outlet. Before entering the heat exchanger 11, the air is filtered by the filter screen 12. When the air flows through the filter screen 12, the filter screen 12 will generate resistance to the airflow. The magnitude of the resistance is directly related to the cleanliness of the filter screen. A pressure tap is set on the side of the filter screen near the air inlet, which is usually connected to the "high pressure end" of the differential pressure sensor 26 through a metal pipe or hose. A pressure tap is set on the side of the filter screen 12 near the heat exchange core, which is connected to the "low pressure end" of the differential pressure sensor 26. The differential pressure sensor 26 detects the pressure difference before and after the filter screen 12 in real time and converts the physical pressure signal into an electrical signal and outputs it to the controller 4. When the pressure difference is less than the cleaning threshold, the filter screen 12 is judged to be in good condition and the equipment is operating normally. When the pressure difference is greater than the blockage threshold, the filter screen 12 is judged to be blocked. The controller 4 controls the motor 22 to start. The motor 22 drives the connecting rod 24 and the brush plate 25 to rotate through the rotating shaft 23. The brush plate 25 cleans the dust on the surface of the filter screen 12, thereby reducing the blockage of the filter screen 12 and avoiding affecting the normal ventilation effect. When it is necessary to replace the filter screen 12 with a different aperture or to clean the filter screen 12, the operator first unscrews the removal bolt 33, then slides the filter screen 12 to the right to slide it out of the slide groove 31, thereby realizing the disassembly of the filter screen 12 for easy cleaning or replacement. Then, the filter screen 12 is slid into the slide groove 31, and then the bolt 33 is screwed into the screw hole 32 to realize the connection between the filter screen 12 and the heat exchanger 11.

[0041] Example 2

[0042] An auxiliary function has been added based on Embodiment 1.

[0043] See Figure 1-5 A handle 34 is fixedly connected to the outer wall of the filter screen 12, and the handle 34 is slidably connected to a groove on the heat exchanger 11. A through groove 5 is provided on the front side wall of the heat exchanger 11, and the through groove 5 is located below the filter screen 12. A groove is provided on the rotating shaft 23, and a connecting block 6 is fixedly connected to one end of the connecting rod 24 near the rotating shaft 23. A bolt 61 is threadedly connected to the rotating shaft 23 and the connecting block 6.

[0044] The operator uses handle 34 to operate the filter screen 12, increasing the convenience of cleaning or replacing the filter screen 12. When the brush plate 25 rotates to clean, the bottom groove 5 facilitates dust falling to the bottom of the heat exchanger 11, reducing dust accumulation on the heat exchanger 11. After a period of use, the brush plate 25 is prone to wear, affecting the cleaning effect. At this time, after the operator stops the machine, unscrews bolt 2 61 to remove the connecting block 6 on the connecting rod 24 from the rotating shaft 23. Then, the connecting block 6 on the new brush plate 25 is inserted into the groove of the rotating shaft 23, and bolt 2 61 is screwed into the threaded hole on the rotating shaft 23 and the connecting block 6 to complete the connection between the rotating shaft 23 and the connecting rod 24.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ventilation structure for a heat exchanger, comprising a main body assembly (1), said main body assembly (1) comprising: A heat exchanger (11) is provided with a filter screen (12). A fan (13) is installed on the rear side wall of the heat exchanger (11), and the input end of the fan (13) is in communication with the heat exchanger (11); The feature is that a cleaning assembly (2) is provided on the heat exchanger (11) and the filter screen (12), the cleaning assembly (2) comprising: The bracket (21) is fixedly connected to the outer wall of the heat exchanger (11); The motor (22) is mounted on the bracket (21); The rotating shaft (23) is fixedly connected to the output shaft of the motor (22); A connecting rod (24) is located at the end of the rotating shaft (23) away from the motor (22); The brush plate (25) is fixedly connected to the outer end of the connecting rod (24), and the brush plate (25) is slidably connected to the outer wall of the filter screen (12); A differential pressure sensor (26) is installed on the heat exchanger (11), and the pressure points of the differential pressure sensor (26) are located on both sides of the filter screen (12).

2. The vent structure of a heat exchanger according to claim 1, wherein: A controller (4) is provided on the outer wall of the heat exchanger (11), and the controller (4) is electrically connected to the differential pressure sensor (26), the motor (22), the heat exchanger (11) and the filter (12).

3. The vent structure of a heat exchanger according to claim 2, wherein: The heat exchanger (11) and the filter screen (12) are provided with a disassembly assembly (3), the disassembly assembly (3) comprising: A chute (31) is formed on the outer wall of the heat exchanger (11), and the filter screen (12) is slidably connected in the chute (31); Screw holes (32) are symmetrically opened on the heat exchanger (11) and the filter screen (12); Bolt 1 (33) is symmetrically and threadedly connected to the screw hole (32).

4. The vent structure of a heat exchanger according to claim 3, wherein: A handle (34) is fixedly connected to the outer wall of the filter screen (12), and the handle (34) is slidably connected to a groove opened on the heat exchanger (11).

5. The vent structure of a heat exchanger according to claim 4, wherein: The heat exchanger (11) has a through groove (5) on its front side wall, and the through groove (5) is located below the filter screen (12).

6. The vent structure of a heat exchanger according to claim 5, wherein: The rotating shaft (23) has a groove, and the connecting rod (24) is fixedly connected to a connecting block (6) at one end near the rotating shaft (23). The rotating shaft (23) and the connecting block (6) are threadedly connected with bolt two (61).

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