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, an isolation box is arranged outside the permanent magnet brushless motor air compressor, and first heat dissipation openings are formed in the box wall of the isolation box and the corresponding box body; and an air draft fan is arranged in the cavity in the upper portion of the box body, and a second heat dissipation opening is 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] The invention relates to the technical field of medical devices, and in particular to a heat dissipation structure of a portable external counterpulsation device. Background Art

[0002] EECP is a method of non-invasively pressing the lower body externally to relieve and eliminate angina symptoms and improve the hypoxic-ischemic state of important organs of the body. It is also a medical device used to prevent and treat cardiovascular and cerebrovascular diseases. Traditional EECP devices use air bags wrapped around the limbs and buttocks to inflate and pressurize the air bags during the diastole of the heart, prompting blood from the limb arteries and veins to return to the heart, significantly increasing diastolic pressure, improving blood perfusion of important organs such as the heart and brain, and reducing cardiac afterload; during the systole of the heart, the air bags are quickly deflated, the pressure is relieved, and the systolic pressure in the aorta is reduced, minimizing the resistance of the heart's ejection phase, and accelerating the blood flow to the distal end, thereby achieving the counterpulsation effect.

[0003] Traditional extracorporeal counterpulsation devices usually include a counterpulsation bed and a control host, in which the counterpulsation bed is integrated with components such as an air compressor, a frequency converter, an air storage tank, and a solenoid valve group. It weighs 400-500 pounds, is inconvenient to move, and is only suitable for hospitals. When patients need to use extracorporeal counterpulsation devices for rehabilitation treatment, they need to go to the hospital every day, which is very inconvenient for patients. In response to the above problems, miniaturized extracorporeal counterpulsation devices have appeared in the industry. After the extracorporeal counterpulsation device is designed into a small portable structure, its internal space is greatly reduced, so how to quickly dissipate the heat generated by the working rooms of each component in a timely manner is an urgent problem to be solved. Summary of the invention

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

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a heat dissipation structure of a portable external counterpulsation device, including a box body, a permanent magnet brushless motor air compressor and a switching power supply are arranged in the lower cavity of the box body, an isolation box is arranged outside the permanent magnet brushless motor air compressor, a first heat dissipation port is opened on the box wall of the isolation box and the corresponding box body, a blowing fan discharges the heat in the isolation box, an exhaust fan is arranged in the upper cavity of the box body, and a second heat dissipation port is opened on the upper box wall of the box body.

[0006] Furthermore, the isolation box includes a first chamber and a second chamber distributed laterally, the compressor of the permanent magnet brushless motor air compressor is placed 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 arranged in the second chamber, the first heat dissipation port is opened on the box wall of the first chamber away from the second chamber, and the third heat dissipation port is opened on the box wall of the second chamber away from the first chamber. The blowing fan includes a first blowing fan and a second blowing fan respectively arranged at the first heat dissipation port and the third heat dissipation port.

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

[0008] Furthermore, the area where the isolation box is located is the lower chamber, and the inner cavity of the upper part of the isolation box is divided into a middle chamber and an upper chamber by a partition. The middle chamber is provided with a gas storage tank, and the upper chamber is provided with a solenoid valve and a main control unit. Ventilation holes are provided on the partition, and the exhaust fan is provided on the lower plate surface of the partition corresponding to the ventilation holes, and the second heat dissipation port is provided on the box wall corresponding to the upper chamber.

[0009] Furthermore, the ventilation hole is arranged away from one side of the back plate, and the second heat dissipation port is arranged at the bottom of the groove at the handle position.

[0010] Furthermore, the main control unit includes a human-computer interaction screen embedded in the box and a main control board and a circuit board arranged in the upper chamber, and the ventilation holes are arranged to avoid the installation positions of the main control board and the circuit board.

[0011] Furthermore, a handle is provided on each side of the box body. The handle is an embedded structure, including a groove sunken into the inner cavity of the box body, a buckle plate is provided on the top of the inner wall of the groove protruding downward, and a plurality of small holes are densely distributed on the bottom of the groove to form a second heat dissipation outlet.

[0012] Furthermore, the ventilation openings on the box body are all in the shape of a grille with dense small holes.

[0013] In the above scheme, an isolation box is provided outside the permanent magnet brushless motor air compressor to isolate it in physical space, and most of the heat generated is directly discharged from the first heat dissipation port opened on the wall of the isolation box. 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. An exhaust fan is provided in the upper cavity of the box to extract the heat in the upper part of the box and discharge it from the second heat dissipation port. Through the combination of isolation + extraction, the heat is discharged out of the box in a timely manner, thereby ensuring the stable operation of each component of the counterpulsation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a stereoscopic diagram of an external counterpulsation device; Figure 2 for Figure 1 Schematic diagram of the internal structure after removing the back panel; Figure 3 for Figure 2 Schematic diagram of the structure after removing some components; Figure 4 for Figure 3 Section Figure 1 ; Figure 5 for Figure 3 Section Figure 2 ; Figure 6 This is a schematic diagram of the structure of the isolation box. DETAILED DESCRIPTION

[0015] Combine the following Figure 1-Figure 6 The utility model is further described in detail.

[0016] See also Figure 1-Figure 6 As shown, a heat dissipation structure of a portable external counterpulsation device includes a box body 10, a permanent magnet brushless motor air compressor 20 and a switching power supply 30 arranged in the lower cavity of the box body 10, an isolation box 11 is arranged outside the permanent magnet brushless motor air compressor 20, a first heat dissipation port a is opened on the box wall of the isolation box 11 and the corresponding box body 10, and a blower fan discharges the heat in the isolation box 11, an exhaust fan 40 is arranged in the upper cavity of the box body 10, and a second heat dissipation port b is opened on the upper box wall of the box body 10. The permanent magnet brushless motor air compressor 20 is the component with the largest heat generation in the entire external counterpulsation device, so in order to prevent it from dissipating heat to other components and affecting the normal operation of other components, an isolation box 11 is arranged outside the permanent magnet brushless motor air compressor 20 to isolate it in physical space, and most of the heat generated by it is directly blown away by the blower fan and discharged from the first heat dissipation port a opened on the box wall of the isolation box 11. However, it is inevitable that a small amount of heat will rise, and this part of heat may also affect the performance of components on the upper part of the box 10, such as the main control board, circuit board, and solenoid valve, so an exhaust fan 40 is arranged in the upper cavity of the box 10 to extract the heat in the upper part of the box 10 and discharge it from the second heat dissipation port b. Through the combination of isolation and exhaust, the heat is discharged from the box 10 in a timely manner, thereby ensuring the stable operation of each component of the counterpulsation device.

[0017] The isolation box 11 includes a first chamber 111 and a second chamber 112 which are distributed laterally. The compressor 21 of the permanent magnet brushless motor air compressor 20 is placed 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 provided on the box wall of the first chamber 111 away from the second chamber 112. The third heat dissipation port c is provided on the box wall of the second chamber 112 away from the first chamber 111. The utility model adopts a permanent magnet brushless motor air compressor 20, which 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 select a low-voltage DC power supply. (2) The brushless motor air compressor 20 is directly powered by the output of the switching power supply which has passed the EMC and safety regulations monitoring. Compared with the AC power supply of the traditional external counterpulsation, it can effectively reduce the interference of the AC power on the signal quality of the external counterpulsation signal collection part and improve the stability of the system. (3) The DC brushless motor is used, and the voltage is reduced to 48V. Not only does it not require a frequency converter, but it also eliminates the need for harmonic filters and isolation transformers. 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 that controls the speed through the frequency converter, it has a faster and more stable response and can make the treatment pressure reach the expected pressure more quickly. (5) There are many advantages of brushless motor drive, such as: 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 motor speed, but the brushless motor can know the motor status, speed, torque, current, voltage, torque, etc. in real time.

[0018] Since the frequency converter, harmonic filter and isolation transformer are omitted, not only the weight and volume of the whole device are reduced, but also the heat source is reduced, and the heat generation is reduced. The blowing fan includes a first blowing fan 151 and a second blowing fan 152 respectively arranged 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 large amount of heat when working, the first chamber 111 and the second chamber 112 are respectively provided with the first blowing fan 151 and the second blowing fan 152 to dissipate heat, ensure that the heat is dissipated in time, and ensure the safety and stability of the operation of each component.

[0019] The first chamber 111 is provided with a metal mesh 13 on one side of the back plate 12 of the box body 10, and the other end face is closed. A cold air inlet d is also provided on the back plate 12. Cold air enters the inner cavity of the box body 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. The box body 10 here is composed of a main body with an open back and a back plate 12, which is conducive to the assembly of various internal components. A cold air inlet d is provided on the back plate 12. This cold air inlet d corresponds to the position of the middle chamber B. The compressor 21 draws the cold air in the external environment into it from the cold air inlet d. At the same time, the cold air extracted by the exhaust fan 40 also enters the box body 10 from the cold air inlet d, thereby discharging the heat of the middle chamber B and the upper chamber C. Taking into account the demand for cold air and the strength of the entire back panel 12, it is preferred to set the cold air inlet d on the back panel 12 corresponding to the middle chamber B. This can ensure that the cold air can smoothly enter the compressor 21 and the upper exhaust fan 40 at the same time, and also ensure that the strength of the box body 10 meets the requirements.

[0020] The area where the isolation box 11 is located is the lower chamber A. The inner cavity of the box body 10 at the upper part of the isolation box 11 is divided into a middle chamber B and an upper chamber C by a partition 14. A gas storage tank 50 is arranged in the middle chamber B, and a solenoid valve 60 and a main control unit 70 are arranged in the upper chamber C. A ventilation hole 141 is provided on the partition 14. The exhaust fan 40 is arranged on the lower plate surface of the partition 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. The partition 14 provides a mounting position for the solenoid valve 60 and the main control unit 70, and can prevent the heat generated by the solenoid valve 60 and the main control unit 70 from entering the middle chamber B when they are working, affecting the temperature of the gas in the gas storage tank 50. The top plate 113 of the isolation box 11 physically separates the lower chamber A and the middle chamber B, and at the same time provides a mounting position for the gas storage tank 50, further reducing the volume of the entire counterpulsation device.

[0021] Furthermore, the ventilation hole 141 is arranged away from one side of the back plate 12 , and the second heat dissipation port b is arranged at the bottom of the groove at the position of the handle 80 .

[0022] Furthermore, the main control unit 70 includes a human-computer interaction screen 71 embedded in the box 10 and a main control board 72 and a circuit board 73 arranged in the upper chamber C, and the ventilation holes 141 are arranged to avoid the installation positions of the main control board 72 and the circuit board 73.

[0023] A handle 80 is provided on both sides of the box body 10. The handle 80 is an embedded structure, including a groove 81 sunken into the inner cavity of the box body 10. A buckle plate 82 is provided on the top of the inner wall of the groove 81 protruding downward. The bottom of the groove 81 is densely covered with multiple small holes to form a second heat dissipation port b, which is well hidden and beautiful.

[0024] In order to prevent foreign matter from entering the box body 10, the vents on the box body 10 are all in the shape of a grille with dense small holes, which will not affect ventilation and also maintain aesthetics.

[0025] The entire extracorporeal counterpulsation device is 55cm long, 34cm wide and 60cm high. It is small in size and occupies little space. It is suitable for multiple scenarios such as hospitals and homes. It weighs only 25kg, so an adult can easily lift and transport it.

[0026] The above shows and describes the basic principles, main features and characteristics of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A heat dissipation structure of a portable external counterpulsation device, comprising a box (10), characterized in that: A permanent magnet brushless motor air compressor (20) and a switching power supply (30) are arranged in a lower cavity of a box body (10); an isolation box (11) is arranged outside the permanent magnet brushless motor air compressor (20); a first heat dissipation port (a) is provided on a box wall of the isolation box (11) and a corresponding box body (10); a blower fan discharges heat from the isolation box (11); an exhaust fan (40) is arranged in an upper cavity of the box body (10); and a second heat dissipation port (b) is provided on an upper box wall of the box body (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) which are distributed laterally. The compressor (21) of the permanent magnet brushless motor air compressor (20) is placed 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 provided on the box wall of the first chamber (111) away from the second chamber (112). The third heat dissipation port (c) is provided on the box wall of the second chamber (112) away from the first chamber (111). The blowing fan comprises a first blowing fan (151) and a second blowing fan (152) which are respectively arranged at the first heat dissipation port (a) and the third heat dissipation port (c).

3. The heat dissipation structure of a portable external counterpulsation device according to claim 2, characterized in that: A metal mesh (13) is provided on one side of the first chamber (111) adjacent to the back plate (12) of the box body (10), and the other end face is closed. A cold air inlet (d) is also provided on the back plate (12) accordingly. Cold air enters the inner cavity of the box body (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 the lower chamber (A). The inner cavity of the box body (10) at the upper part of the isolation box (11) is divided into a middle chamber (B) and an upper chamber (C) by a partition (14). An air storage tank (50) is arranged in the middle chamber (B), and an electromagnetic valve (60) and a main control unit (70) are arranged in the upper chamber (C). A ventilation hole (141) is opened on the partition (14). The exhaust fan (40) is arranged on the lower plate surface of the partition (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 at a side away from the back plate (12), and the second heat dissipation port (b) is arranged at the bottom of the groove 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 human-machine interaction screen (71) embedded in the box (10) and a main control board (72) and a circuit board (73) arranged 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).

7. The heat dissipation structure of a portable external counterpulsation device according to claim 1, characterized in that: A handle (80) is provided on each side of the box body (10). The handle (80) is an embedded structure and includes a groove (81) recessed into the inner cavity of the box body (10). A buckle plate (82) is provided on the top of the inner wall of the groove (81) protruding downward. The bottom of the groove (81) is densely covered 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 vents on the box body (10) are all in the shape of a grid with densely distributed small holes.

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