Heat dissipation structure of portable external counterpulsation device

Abstract

The heat dissipation structure of the portable external counterpulsation device is good in heat dissipation performance and high in reliability, a permanent magnet brushless motor air compressor and a switching power supply are arranged in a cavity in the lower portion of a box body, and an isolation box is arranged outside the permanent magnet brushless motor air compressor. First heat dissipation openings are formed in the box wall of the isolation box and the corresponding box body, the air blowing fan discharges heat in the isolation box, an air draft fan is arranged in a cavity in the upper portion of the box body, and second heat dissipation openings are formed in the box wall of the upper portion of the box body. The isolation box is arranged outside the permanent magnet brushless motor air compressor, isolation is carried out in physical space, and most heat generated by the permanent magnet brushless motor air compressor is directly discharged from the first heat dissipation opening formed in the box wall of the isolation box. And an exhaust fan is arranged in the cavity at the upper part of the box body, and the heat at the upper part of the box body is exhausted and discharged from a second heat dissipation opening. Through a method of combining isolation, blowing discharge and pumping discharge, heat is discharged out of the box body in time, and stable operation of all assemblies of the counterpulsation device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a heat dissipation structure for a portable external counterpulsation device. Background Technology

[0002] External counterpulsation (ECP) is a non-invasive method of applying pressure to the lower body externally to alleviate and eliminate angina symptoms, improve the hypoxia and ischemia of vital organs, and is also a medical device used to prevent and treat cardiovascular and cerebrovascular diseases. Traditional ECP devices use air bladders wrapped around the limbs and buttocks. During diastole, the air bladders are inflated and pressurized, prompting blood from the arteries and veins of the limbs to return to the heart, significantly increasing diastolic pressure and improving blood perfusion to vital organs such as the heart and brain, reducing cardiac afterload. During systole, the air bladders are rapidly deflated, releasing pressure and causing a decrease in systolic pressure in the aorta, minimizing resistance during cardiac ejection and accelerating blood flow to distal sites, thus achieving the counterpulsation effect.

[0003] Traditional external counterpulsation (ECP) devices typically consist of a counterpulsation bed and a control unit. The counterpulsation bed integrates components such as an air compressor, frequency converter, air tank, and solenoid valve assembly, weighing 400-500 catties, making it inconvenient to move and only suitable for hospitals. Patients requiring ECP for rehabilitation therapy need to go to the hospital daily, which is extremely inconvenient. To address these issues, miniaturized ECP devices have emerged. Designing these devices as small and portable significantly reduces internal space, making the rapid dissipation of heat generated by the various components a critical challenge. Utility Model Content

[0004] The purpose of this invention is to provide a heat dissipation structure for a portable external counterpulsation device with good heat dissipation performance and high reliability.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a heat dissipation structure for a portable external counterpulsation device, including a housing, a permanent magnet brushless motor air compressor and a switching power supply are installed in the lower cavity of the housing, an isolation box is provided outside the permanent magnet brushless motor air compressor, a first heat dissipation vent is provided on the wall of the isolation box and the corresponding housing, a blower fan dissipates the heat in the isolation box, an exhaust fan is provided in the upper cavity of the housing, and a second heat dissipation vent is provided on the upper wall of the housing.

[0006] Furthermore, the isolation box includes a first chamber and a second chamber arranged laterally. The compressor of the permanent magnet brushless motor air compressor is placed in and fixed in the first chamber. The motor driver of the permanent magnet brushless motor air compressor is fixed in the second chamber. The switching power supply is also located in the second chamber. The first heat dissipation vent is opened on the side of the first chamber away from the second chamber. The third heat dissipation vent is opened on the side of the second chamber away from the first chamber. The blower includes a first blower and a second blower respectively located at the first heat dissipation vent and the third heat dissipation vent.

[0007] Furthermore, a metal mesh is provided on one side of the back panel of the first chamber near the box body, and the other end is closed. A cold air inlet is also provided on the back panel. Cold air enters the inner cavity of the box body from the cold air inlet and enters the first chamber through the gap between the back panel and the metal mesh.

[0008] Furthermore, the area where the isolation box is located is the lower chamber. The upper part of the isolation box is divided into a middle chamber and an upper chamber by a partition. An air storage tank is installed in the middle chamber, and a solenoid valve and a main control unit are installed in the upper chamber. Ventilation holes are opened on the partition. The exhaust fan is installed on the lower plate of the partition corresponding to the ventilation hole, and the second heat dissipation vent is installed on the box wall corresponding to the upper chamber.

[0009] Furthermore, the ventilation holes are located on the side away from the back panel, and the second heat dissipation vent is located at the bottom of the groove at the handle position.

[0010] Furthermore, the main control unit includes a human-machine interface screen embedded in the housing and a main control board and circuit board disposed in the upper cavity, wherein the ventilation holes are arranged to avoid the installation positions of the main control board and circuit board.

[0011] Furthermore, a handle is provided on each side of the box. The handle has an embedded structure, including a groove recessed into the inner cavity of the box. A buckle plate is provided on the top of the inner wall of the groove, and the bottom of the groove is densely covered with multiple small holes to form a second heat dissipation vent.

[0012] Furthermore, the ventilation openings on the enclosure are all grid-like structures with densely packed small holes.

[0013] In the above solution, an isolation box is installed outside the permanent magnet brushless motor air compressor to physically isolate it. Most of the heat generated is directly discharged through the first heat dissipation vent in the isolation box wall. A small amount of heat rise may also affect the performance of components in the upper part of the box, such as the main control board, circuit board, and solenoid valve. Therefore, an exhaust fan is installed in the upper cavity of the box to extract the heat from the upper part of the box and discharge it through a second heat dissipation vent. By combining isolation and exhaust, heat is promptly discharged from the box, thereby ensuring the stable operation of all components of the counterpulsation device. Attached Figure Description

[0014] Figure 1 A three-dimensional diagram of an external counterpulsation device;

[0015] Figure 2 for Figure 1 Schematic diagram of the internal structure after removing the back panel;

[0016] Figure 3 for Figure 2 A schematic diagram of the structure after removing some components;

[0017] Figure 4 for Figure 3 Cross-section Figure 1 ;

[0018] Figure 5 for Figure 3 Cross-section Figure 2 ;

[0019] Figure 6 This is a schematic diagram of the isolation box. Detailed Implementation

[0020] The following is combined with Figures 1-6 This utility model will be discussed in further detail.

[0021] See Figures 1-6 As shown, a heat dissipation structure for a portable external counterpulsation device includes a housing 10, a permanent magnet brushless motor air compressor 20, and a switching power supply 30 housed in the lower cavity of the housing 10. An isolation box 11 is provided outside the permanent magnet brushless motor air compressor 20. The isolation box 11 and the corresponding housing 10 have first heat dissipation vents a. A blower fan dissipates heat from the isolation box 11. An exhaust fan 40 is installed in the upper cavity of the housing 10, and a second heat dissipation vent b is provided on the upper wall of the housing 10. The permanent magnet brushless motor air compressor 20 is the component that generates the most heat in the entire external counterpulsation device. Therefore, to prevent it from dissipating heat to other components and affecting their normal operation, an isolation box 11 is provided outside the permanent magnet brushless motor air compressor 20 to physically isolate it. Most of the heat generated is directly blown away by the blower fan and discharged through the first heat dissipation vent a on the wall of the isolation box 11. However, inevitably, a small amount of heat will still rise. This heat may affect the performance of components in the upper part of the enclosure 10, such as the main control board, circuit board, and solenoid valve. Therefore, an exhaust fan 40 is installed in the upper cavity of the enclosure 10 to extract the heat from the upper part of the enclosure 10 and exhaust it through the second heat dissipation port b. By combining isolation and exhaust, heat is promptly discharged from the enclosure 10, thereby ensuring the stable operation of all components of the counterpulsation device.

[0022] The isolation box 11 includes a first chamber 111 and a second chamber 112 distributed laterally. The compressor 21 of the permanent magnet brushless motor air compressor 20 is placed in and fixed in the first chamber 111. The motor driver 22 of the permanent magnet brushless motor air compressor 20 is fixed in the second chamber 112. The switching power supply 30 is also located in the second chamber 112. The first heat dissipation port a is opened on the side of the first chamber 111 away from the second chamber 112. The third heat dissipation port c is opened on the side of the second chamber 112 away from the first chamber 111. The permanent magnet brushless motor air compressor 20 used in this utility model has at least the following beneficial effects: (1) Compared with the air compressor driven by the three-phase asynchronous motor of the traditional external counterpulsation device, it has a wider power supply applicability and can use low-voltage DC power supply. (2) The brushless motor air compressor 20 is directly powered by the output of the switching power supply monitored by EMC and safety regulations. Compared with the AC power supply of the traditional external counterpulsation, it can effectively reduce the interference of AC power on the signal quality of the external counterpulsation signal acquisition part and improve the stability of the system. (3) Using a DC brushless motor, the voltage is reduced to 48V, which not only eliminates the need for a frequency converter, but also saves the harmonic filter and isolation transformer. The driver can respond and control the motor speed and the pressure of the air tank more quickly. (4) The brushless motor air compressor 20 controls the speed through the motor driver 22. Compared with the three-phase asynchronous motor which controls the speed through a frequency converter, the response is faster and more stable, and the treatment pressure can reach the expected pressure more quickly. (5) The brushless motor drive has many other advantages. For example, the motor driven by the frequency converter can only adjust the speed by changing the frequency of the motor power supply, and cannot know the current speed of the motor. However, the brushless motor can know the status of the motor, such as speed, torque, current, voltage, etc. in real time.

[0023] By eliminating the frequency converter, harmonic filter, and isolation transformer, the weight and volume of the entire device are reduced, as are the heat sources and heat generation. The blower includes a first blower 151 and a second blower 152 respectively located at the first heat dissipation port a and the third heat dissipation port c. Since the motor driver 22 and the switching power supply 30 also generate a significant amount of heat during operation, the first chamber 111 and the second chamber 112 are respectively equipped with the first blower 151 and the second blower 152 for heat dissipation, ensuring timely heat dissipation and guaranteeing the safety and stability of each component's operation.

[0024] The first chamber 111 has a metal mesh 13 on one side of the back panel 12 near the housing 10, and the other end is closed. A cold air inlet d is also provided on the back panel 12. Cold air enters the inner cavity of the housing 10 through the cold air inlet d and enters the first chamber 111 through the gap between the back panel 12 and the metal mesh 13. The housing 10 here is composed of a main body with an open back and a back panel 12, which facilitates the assembly of internal components. The cold air inlet d on the back panel 12 corresponds to the position of the middle chamber B. The compressor 21 draws in cold air from the external environment through the cold air inlet d. Simultaneously, the cold air drawn in by the exhaust fan 40 also enters the housing 10 through the cold air inlet d, thereby expelling heat from the middle chamber B and the upper chamber C. Considering the demand for cold air and the strength of the entire back panel 12, it is preferable to set the cold air inlet d on the back panel 12 corresponding to the middle chamber B. This ensures that cold air can smoothly enter the compressor 21 and the upper exhaust fan 40 at the same time, and also ensures that the strength of the housing 10 meets the requirements.

[0025] The isolation chamber 11 is located in the lower chamber A. The inner cavity of the upper chamber 10 of the isolation chamber 11 is divided into a middle chamber B and an upper chamber C by a partition 14. The middle chamber B houses the gas storage tank 50, and the upper chamber C houses the solenoid valve 60 and the main control unit 70. The partition 14 has ventilation holes 141, and the exhaust fan 40 is located on the lower plate surface of the partition 14 corresponding to the ventilation holes 141. The second heat dissipation vent b is located on the corresponding wall of the upper chamber C. The partition 14 provides a mounting position for the solenoid valve 60 and the main control unit 70, and at the same time prevents the heat generated by the solenoid valve 60 and the main control unit 70 during operation from entering the middle chamber B and affecting the temperature of the gas in the gas storage tank 50. The top plate 113 of the isolation chamber 11 physically separates the lower chamber A and the middle chamber B, and also provides a mounting position for the gas storage tank 50, further reducing the overall size of the counterpulsation device.

[0026] Furthermore, the ventilation hole 141 is located on the side away from the back plate 12, and the second heat dissipation port b is located at the bottom of the groove at the handle 80 position.

[0027] Furthermore, the main control unit 70 includes a human-machine interface screen 71 embedded in the housing 10 and a main control board 72 and a circuit board 73 disposed in the upper chamber C. The ventilation hole 141 is arranged to avoid the installation positions of the main control board 72 and the circuit board 73.

[0028] Each side of the housing 10 is provided with a handle 80. The handle 80 is an embedded structure, including a groove 81 recessed into the inner cavity of the housing 10. A buckle plate 82 is provided on the top of the inner wall of the groove 81. The bottom of the groove 81 is densely covered with multiple small holes to form a second heat dissipation vent b. It has good concealment and is aesthetically pleasing.

[0029] To prevent external impurities from entering the housing 10, the vents on the housing 10 are all grid-like structures with densely packed small holes, which does not affect ventilation and also maintains an aesthetic appearance.

[0030] The entire external counterpulsation device is 55cm long, 34cm wide, and 60cm high. It is small in size and takes up little space, making it suitable for various scenarios such as hospitals and homes. Moreover, it weighs only 25kg, so an adult can easily lift and transport it.

[0031] The foregoing has shown and described the basic principles, main features, and characteristics of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation structure of a portable external counterpulsation device, comprising a box body (10), characterized in that: Permanent magnet brushless motor air compressor (20) and switching power supply (30) are arranged in the lower cavity of the box (10), the permanent magnet brushless motor air compressor (20) is externally provided with an isolation box (11), the box wall of the isolation box (11) and the corresponding box (10) are provided with a first heat dissipation port (a), and the heat in the isolation box (11) is discharged by a blowing fan, a suction fan (40) is arranged in the upper cavity of the box (10), and a second heat dissipation port (b) is formed in the upper box wall of the box (10).

2. The heat dissipation structure of a portable external counterpulsation device according to claim 1, characterized in that: The isolation box (11) comprises a first chamber (111) and a second chamber (112) distributed transversely, the compressor (21) of the permanent magnet brushless motor air compressor (20) is arranged in the first chamber (111) and fixed, the motor driver (22) of the permanent magnet brushless motor air compressor (20) is fixed in the second chamber (112), the switching power supply (30) is also arranged in the second chamber (112), the first heat dissipation port (a) is formed in the box wall of the first chamber (111) away from the second chamber (112), the third heat dissipation port (c) is formed in the box wall of the second chamber (112) away from the first chamber (111), and the blowing fan comprises a first blowing fan (151) and a second blowing fan (152) arranged in the first heat dissipation port (a) and the third heat dissipation port (c) respectively.

3. The heat dissipation structure of a portable external counterpulsation device according to claim 2, characterized in that: The first chamber (111) is provided with a metal mesh (13) near one side of the back plate (12) of the box (10), and the other end surface is closed, and a cold air inlet (d) is also arranged on the back plate (12) correspondingly, cold air enters the inner cavity of the box (10) from the cold air inlet (d) and enters the first chamber (111) from the gap between the back plate (12) and the metal mesh (13).

4. The heat dissipation structure of a portable external counterpulsation device according to claim 2, characterized in that: The area where the isolation box (11) is located is a lower chamber (A), the inner cavity of the box (10) at the upper portion of the isolation box (11) is divided into a middle chamber (B) and an upper chamber (C) by a partition plate (14), the middle chamber (B) is provided with a gas storage tank (50), the upper chamber (C) is provided with an electromagnetic valve (60) and a main control unit (70), the partition plate (14) is provided with a ventilation hole (141), the suction fan (40) is arranged on the lower surface of the partition plate (14) corresponding to the ventilation hole (141), and the second heat dissipation port (b) is arranged on the box wall corresponding to the upper chamber (C).

5. The heat dissipation structure of a portable external counterpulsation device according to claim 4, characterized in that: The ventilation hole (141) is arranged away from the back plate (12), and the second heat dissipation port (b) is arranged at the groove bottom at the position of the handle (80).

6. The heat dissipation structure of a portable external counterpulsation device according to claim 4, characterized in that: The main control unit (70) comprises a man-machine interaction screen (71) embedded on the box (10), a main control board (72) and a circuit board (73) arranged in the upper chamber (C), and the ventilation hole (141) is arranged away from the installation positions of the main control board (72) and the circuit board (73).

7. The heat dissipation structure of a portable external counterpulsation device according to claim 1, characterized in that: Two sides of the box (10) are provided with a handle (80), the handle (80) is an embedded structure, including a recess (81) recessed to the inner cavity of the box (10), the top of the inner wall of the recess (81) is provided with a buckle plate (82) which is protruded downward, and the bottom of the recess (81) is densely provided with a plurality of small holes to form a second heat dissipation port (b).

8. The heat dissipation structure of a portable external counterpulsation device according to claim 1, characterized in that: The air vents on the box (10) are all grid-shaped with small holes densely arranged.

Images