Microwave radiometer heat dissipation system

Abstract

The utility model provides a kind of microwave radiometer heat dissipation system, comprising: shell, inside formation has accommodating chamber, the opposite side wall of shell is provided with air inlet and air outlet;Fan assembly, including air inlet fan and air outlet fan, air inlet fan is arranged in air inlet, air outlet fan is arranged in air outlet;And heat dissipation tooth component, including first heat dissipation tooth and second heat dissipation tooth, first heat dissipation tooth and the first refrigerating fin of V wave band receiver contact fixed, second heat dissipation tooth and the second refrigerating fin of K wave band receiver contact fixed, first heat dissipation tooth and second heat dissipation tooth are oppositely arranged in accommodating chamber with interval, form through heat dissipation channel, air enters heat dissipation channel from air inlet to the air outlet exhaust. Through symmetrical air inlet fan and air outlet fan, and the collaborative layout of bidirectional opposed heat dissipation tooth, heat dissipation tooth gathered heat is linearly exported via intermediate heat dissipation channel, solve the problem of refrigerating fin hot end heat accumulation.

Description

Technical Field

[0001] This utility model relates to the field of microwave radiometer technology, and specifically to a microwave radiometer heat dissipation system. Background Technology

[0002] A microwave radiometer is a meteorological observation device based on atmospheric microwave remote sensing technology. By selecting appropriate frequencies within the typical atmospheric window microwave V-band and atmospheric water vapor window microwave K-band, it achieves uninterrupted continuous detection by remote sensing measurements of atmospheric microwave radiation. Its measurement stability and accuracy are of paramount importance.

[0003] Currently, microwave radiometers generate heat from their internal electronic components during prolonged operation. When the set temperature inside the device exceeds the receiver's operating temperature, the internal cooling element is triggered. However, the cooling element generates heat at its hot end, which tends to accumulate inside the radiometer. Furthermore, when the external ambient temperature is too high, this heat cannot be dissipated quickly enough. Other cooling technologies that use fans have low heat dissipation efficiency, impacting the radiometer's overall performance.

[0004] It is evident that there is an urgent need to design a microwave radiometer heat dissipation system to improve the temperature control efficiency of the microwave radiometer, maintain the operating temperature of the receiver, and enable the receiver to operate stably in a stable environment. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a microwave radiometer heat dissipation system, comprising:

[0006] The shell has an internal chamber, and air inlets and outlets are provided on opposite side walls of the shell.

[0007] A fan assembly includes an intake fan group and an exhaust fan group, wherein the intake fan group is disposed at the air inlet and the exhaust fan group is disposed at the air outlet; and

[0008] The heat dissipation tooth assembly includes a first heat dissipation tooth and a second heat dissipation tooth. The first heat dissipation tooth is fixed in contact with the first cooling chip of the V-band receiver, and the second heat dissipation tooth is fixed in contact with the second cooling chip of the K-band receiver. The first heat dissipation tooth and the second heat dissipation tooth are arranged at intervals opposite to each other in the receiving chamber to form a through heat dissipation channel. Air enters the heat dissipation channel from the air inlet and is discharged from the air outlet.

[0009] Furthermore, the two ends of the heat dissipation channel are aligned with the air inlet and the air outlet, respectively.

[0010] Furthermore, the air inlet is equipped with a removable filter.

[0011] Furthermore, the intake fan assembly and the exhaust fan are symmetrically distributed.

[0012] Furthermore, the air intake fan assembly is an axial air intake centrifugal fan, and the air outlet fan assembly is a radial air outlet centrifugal fan.

[0013] Furthermore, the air inlet and the air outlet are respectively provided with fan mounting plates, and the air inlet fan group and the air outlet fan group are respectively mounted on the corresponding fan mounting plates.

[0014] Furthermore, the fins of the first heat dissipation tooth extend toward the second heat dissipation tooth.

[0015] Furthermore, the fin spacing between the first and second heat dissipation fins is 2-5mm, and the fin height is 15-25mm.

[0016] Furthermore, it also includes a constant temperature control unit, the control terminals of the intake fan group and the exhaust fan group are electrically connected to the constant temperature control unit to respond to the cooling command and start synchronously.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention solves the problem of heat accumulation at the hot end of the cooling chip by using a symmetrical intake fan assembly and an exhaust fan assembly, as well as a coordinated layout of a bidirectionally opposed first and second heat dissipation fins, combined with a straight directional air duct design. This forces the convective airflow to vertically penetrate the hot end of the cooling chip, and directs the heat accumulated by the heat dissipation fins through the middle heat dissipation channel in a straight line. Attached Figure Description

[0019] Figure 1 This is an internal front view of the microwave radiometer disclosed in an embodiment of the present invention, showing the structure of the heat dissipation system;

[0020] Figure 2 This is a schematic diagram of the internal partial structure of the microwave radiometer disclosed in an embodiment of the present invention, showing the location of the heat dissipation system;

[0021] Figure 3 This is a schematic diagram of the internal structure of the microwave radiometer heat dissipation system disclosed in an embodiment of the present utility model;

[0022] Figure 4 This is an isometric view of the microwave radiometer heat dissipation system disclosed in an embodiment of this utility model.

[0023] In the picture:

[0024] 00. Shell;

[0025] 10. Intake fan assembly; 11. First intake fan; 12. Second intake fan;

[0026] 20. Exhaust fan assembly; 21. First exhaust fan; 22. Second exhaust fan;

[0027] 31. First heat dissipation tooth; 32. Second heat dissipation tooth;

[0028] 41. First cooling element; 42. Second cooling element;

[0029] 51. Temperature control unit for V-band receiver; 52. Temperature control unit for K-band receiver. Detailed Implementation

[0030] To make the technical solutions and effects of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0031] The present invention aims to provide a heat dissipation system for a microwave radiometer, thereby solving the problem of poor heat dissipation in existing microwave radiometers.

[0032] Please see Figure 1-4 The microwave radiometer is equipped with a housing, and its heat dissipation system is built into the housing. This heat dissipation system mainly includes a housing 00, a fan assembly, and a heat dissipation tooth assembly. The housing 00 has an internal chamber, and its opposite side walls have air inlets and outlets. The fan assembly includes an inlet fan group 10 and an outlet fan group 20, with the inlet fan group 10 located at the air inlet and the outlet fan group 20 located at the air outlet. The heat dissipation tooth assembly includes a first heat dissipation tooth 31 and a second heat dissipation tooth 32. The first heat dissipation tooth 31 is fixed in contact with the first cooling element 41 of the V-band receiver, and the second heat dissipation tooth 32 is fixed in contact with the second cooling element 42 of the K-band receiver. The first and second heat dissipation teeth 31 and 32 are spaced apart and opposite each other within the housing, forming a through-type heat dissipation channel. Air enters the heat dissipation channel from the air inlet and exits through the air outlet.

[0033] In this embodiment, fan mounting plates are provided at the air inlet and air outlet, and the air inlet fan assembly 10 and air outlet fan assembly 20 are respectively mounted on the corresponding fan mounting plates. The two ends of the heat dissipation channel in the center of the housing are aligned with the air inlet and air outlet, respectively. The air inlet is also provided with a removable filter screen to filter dust.

[0034] Preferably, the intake fan assembly 10 and the exhaust fan assembly 20 are symmetrically distributed. The intake fan assembly 10 includes a first intake fan 11 and a second intake fan 12; the exhaust fan assembly 20 includes a first exhaust fan 21 and a second exhaust fan 22. This symmetrical arrangement of the intake fan assembly 10 and the exhaust fan assembly 20 ensures that airflow is evenly distributed around the object being cooled, preventing the formation of localized high-temperature areas. Furthermore, the symmetrical fan layout effectively reduces equipment vibration. This is because fans generate vibration during operation, and if the fan layout is asymmetrical, these vibrations may superimpose, leading to increased overall equipment vibration. In the symmetrical fan cooling system, the rotational phase difference between the first intake fan 11 and the second intake fan 12 is set to 180°, causing their centrifugal force vectors to cancel each other out in the horizontal direction. Similarly, the phase difference between the first exhaust fan 21 and the second exhaust fan 22 is also 180°, causing their vibration energy to neutralize each other in the vertical direction, meaning that some of the fan vibrations can be canceled out. Meanwhile, from a noise perspective, an asymmetrical fan layout may produce irregular airflow noise, while a symmetrical fan layout can make the airflow more stable, reduce airflow turbulence, and thus reduce noise.

[0035] In this embodiment, the fins of the first heat dissipation tooth 31 extend towards the second heat dissipation tooth 32. The fin spacing between the first heat dissipation tooth 31 and the second heat dissipation tooth 32 is 2-5mm, and the fin height is 15-25mm. The physical boundary of the central heat dissipation channel is formed by the lower edge of the fins of the first heat dissipation tooth 31, the upper edge of the fins of the second heat dissipation tooth 32, and the front and rear inner walls of the housing 00. The air inlet end of the heat dissipation channel is perpendicularly connected to the air outlet surface of the air inlet fan assembly 10, and the air outlet end is parallel to the air inlet surface of the air outlet fan assembly 20. The air inlet fan assembly 10 adopts an axial air inlet centrifugal fan, and during operation, the airflow passes perpendicularly along the axis through the fin gap between the first heat dissipation tooth 31 and the second heat dissipation tooth 32; the air outlet fan assembly 20 adopts a radial air outlet centrifugal fan, which throws the hot air flowing through the heat dissipation tooth out of the housing 00 in a radial 90° direction.

[0036] The system also includes a temperature control unit. The control terminals of the intake fan assembly 10 and the exhaust fan assembly 20 are electrically connected to the temperature control unit to respond to cooling commands and start synchronously. Specifically, the temperature control unit includes a V-band receiver temperature control unit 51 and a K-band receiver temperature control unit 52. The V-band receiver temperature control unit 51 and the K-band receiver temperature control unit 52 are respectively soldered to the control circuit board of the corresponding receiver. Both have built-in STM32F407 microcontrollers and DRV8871 motor driver chips. The temperature signal acquisition terminal of the temperature control unit is connected to the core temperature measurement point of the receiver through a PT1000 platinum resistance thermometer, and its control signal output terminal is connected to the 24V DC motor interfaces of the intake fan assembly 10 and the exhaust fan assembly 20 through silicone wires.

[0037] The V-band receiver's constant temperature control unit 51 and the K-band receiver's constant temperature control unit 52 determine the heating / cooling result based on the following:

[0038] If the instruction flag is 1, heating control is performed. When the difference between the target temperature and the actual temperature exceeds 10℃, the heating element operates at full power. When the difference between the target temperature and the actual temperature is within 10℃, the control quantity is calculated using the PID algorithm.

[0039] If the instruction flag is 0, the cooling device is started, and the intake fan group 10 and the exhaust fan group 20 work at full power. The cooling chip is controlled according to the target temperature and the actual temperature. When the difference between the target temperature and the actual temperature exceeds 10℃, the cooling chip works at full power. When the difference between the target temperature and the actual temperature is within 10℃, the control quantity is calculated using the PID algorithm.

[0040] Specifically, when the V-band receiver temperature control unit 51 detects that the actual temperature of the V-band receiver exceeds the set value of 10°C, its GPIO port synchronously outputs two signals: one to drive the first cooling chip 41 to operate at full power, and the other to trigger the first intake fan 11 and the first exhaust fan 21 to operate at their rated speeds. Similarly, the K-band receiver temperature control unit 52 executes the same control logic for the K-band receiver, realizing the linkage response between the cooling chip and the fan.

[0041] In this embodiment, during operation, external cold air, under the negative pressure of the intake fan assembly 10, passes vertically along the axial direction through the dust filter on the left side of the housing 00 and enters the central heat dissipation duct. The airflow first impacts the fin array of the first heat dissipation tooth 31 and the second heat dissipation tooth 32. At this time, the temperature of the hot end of the first cooling chip 41 is conducted to the fin surface through the substrate of the first heat dissipation tooth 31, while the heat of the second cooling chip 42 is diffused through the substrate of the second heat dissipation tooth 32. The aluminum alloy fins convert the point heat source into a surface heat source, causing the airflow to form a turbulent boundary layer within the gap. The heated airflow then converges into the central heat dissipation channel and accelerates towards the exhaust fan assembly 20 under the effect of cross-sectional convergence. Since the channel cross-section matches the fan inlet, the airflow is radially thrown out of the housing 00 without eddy current loss, completing the forced convection heat dissipation cycle.

[0042] 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 microwave radiometer heat dissipation system, characterized in that, include: The housing (00) has an internal chamber, and air inlets and outlets are provided on opposite side walls of the housing (00); A fan assembly includes an intake fan assembly (10) and an exhaust fan assembly (20), wherein the intake fan assembly (10) is disposed at the air inlet and the exhaust fan assembly (20) is disposed at the air outlet; and The heat dissipation tooth assembly includes a first heat dissipation tooth (31) and a second heat dissipation tooth (32). The first heat dissipation tooth (31) is in contact with and fixed to the first cooling chip (41) of the V-band receiver, and the second heat dissipation tooth (32) is in contact with and fixed to the second cooling chip (42) of the K-band receiver. The first heat dissipation tooth (31) and the second heat dissipation tooth (32) are arranged at intervals opposite to each other in the accommodating chamber to form a through heat dissipation channel. Air enters the heat dissipation channel from the air inlet and is discharged from the air outlet.

2. The microwave radiometer heat dissipation system according to claim 1, characterized in that, The two ends of the heat dissipation channel are aligned with the air inlet and the air outlet, respectively.

3. The microwave radiometer heat dissipation system according to claim 1, characterized in that, The air inlet is equipped with a removable filter.

4. The microwave radiometer heat dissipation system according to claim 1, characterized in that, The intake fan group (10) and the exhaust fan group (20) are symmetrically distributed.

5. The microwave radiometer heat dissipation system according to claim 1, characterized in that, The intake fan assembly (10) is an axial intake centrifugal fan, and the exhaust fan assembly (20) is a radial exhaust centrifugal fan.

6. The microwave radiometer heat dissipation system according to claim 1, characterized in that, The air inlet and the air outlet are respectively provided with fan mounting plates, and the air inlet fan group (10) and the air outlet fan group (20) are respectively installed on the corresponding fan mounting plates.

7. The microwave radiometer heat dissipation system according to claim 1, characterized in that, The fins of the first heat dissipation tooth (31) extend toward the second heat dissipation tooth (32).

8. The microwave radiometer heat dissipation system according to claim 1 or 7, characterized in that, The fin spacing of the first heat dissipation tooth (31) and the second heat dissipation tooth (32) is 2-5mm, and the fin height is 15-25mm.

9. The microwave radiometer heat dissipation system according to claim 1, characterized in that, It also includes a constant temperature control unit. The control terminals of the air intake fan group (10) and the air outlet fan group (20) are electrically connected to the constant temperature control unit to respond to the cooling command and start synchronously.

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