Heat dissipation structure of electric cabinet driving plate and heat pump

Abstract

The utility model relates to a heat dissipation structure of an electric cabinet drive board and a heat pump. The utility model relates to a heat radiation structure of an electric cabinet driving board. The heat radiation structure comprises an electric appliance box and a top cover. The top cover is arranged above the electric appliance box, and the top cover and the electric appliance box are arranged at an interval to form an air outlet 14; the top of the electrical box is provided with a first air port, and the bottom is provided with a second air port. The wind scooper is arranged in the electric appliance box; the wind scooper is provided with an air duct, or the wind scooper and the electric appliance box are enclosed to form the air duct; and the driving plate and the at least one group of heat dissipation assemblies fixedly connected with the driving plate are arranged in the air duct. According to the heat dissipation structure, through the built-in air channel and the reasonable design of the air flow path of the electric control box, heat generated in the operation process of the driving plate is discharged in a concentrated mode, turbulent flow formed by air flow in the electric control box is avoided, and therefore the heat dissipation efficiency of the driving plate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to a heat dissipation structure of a drive plate of an electric control box and a heat pump. Background Art

[0002] With the increasing global energy crisis and the continuous improvement of environmental awareness, high-efficiency and energy-saving heat pump units are increasingly widely used in the fields of construction, industry and civil use. Heat pump units have shown great potential in the fields of refrigeration and heating due to their efficient heat transfer characteristics. However, with the increase in the power of heat pump units and the need for long-term operation, the electric control box integrates a variety of control panels and other components with extremely high heat generation, making the heat dissipation problem of the electric control box gradually prominent, becoming a key factor restricting the performance improvement and stable operation of heat pump units.

[0003] The traditional heat pump unit electrical control box cooling methods mainly include natural cooling, fluorine cooling and ordinary fan cooling. Although these cooling methods are simple and reliable, they have low cooling efficiency and cannot meet the needs of long-term operation of high-power heat pump units, affecting the stability and life of the heat pump units. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a heat dissipation structure for a driver board of an electrical control box. Through a built-in air duct and a reasonably designed air flow path of the electrical control box, the heat generated during the operation of the driver board can be discharged in a centralized manner to avoid turbulence in the air flow inside the electrical control box, thereby improving the heat dissipation efficiency of the driver board.

[0005] Another object of the utility model is to provide a heat pump, which is provided with the heat dissipation structure of the electric control box drive board, and improves the stability of the heat pump operation by centrally discharging the heat of the drive board with a larger heat generation.

[0006] A heat dissipation structure of a driving board of an electric control box, comprising:

[0007] An electrical box and a top cover; the top cover is arranged above the electrical box and is spaced apart from the electrical box to form an exhaust port 14; a first air port is arranged on the top of the electrical box and a second air port is arranged on the bottom; the orthographic projection of the top cover in the plane of the first air port completely covers the first air port;

[0008] An air guide cover is arranged in the electrical box; the air guide cover is provided with an air duct, or the air guide cover and the electrical box are arranged to form an air duct, and two ends of the air duct are arranged toward the first air outlet and the second air outlet respectively;

[0009] The driving plate and at least one group of heat dissipation components fixedly connected to the driving plate are both arranged in the air duct.

[0010] Furthermore, two ends of the air duct are respectively vertically abutted against the top and bottom of the electrical box;

[0011] The air duct is provided with a heat exchange section, and an air inlet section and an air outlet section extending outward at both ends of the heat exchange section; the diameter of the air inlet section gradually shrinks along the air flow direction, and the diameter of the air outlet section gradually expands along the air flow direction; the heat dissipation component is arranged in the heat exchange section.

[0012] Furthermore, the expansion angle of the air inlet section relative to the heat exchange section is 10 to 60°; the expansion angle of the air outlet section relative to the heat exchange section is 30 to 75°;

[0013] The ratio of the heights of the air inlet section, the heat exchange section, and the air outlet section is (0.3-0.5):1:(0.2-0.4).

[0014] Furthermore, the heat dissipation assembly is provided with a heat dissipation element and a fan, the heat dissipation element is provided with a plurality of air flow channels parallel to the air flow direction, and the air inlet end of the fan is arranged opposite to the air flow channels.

[0015] Furthermore, the heat dissipation assembly is further provided with a plurality of partition chambers, and the partition chambers are provided between the heat dissipation element and the top of the electrical box;

[0016] There are multiple fans, which are arranged in the partition cavity in a one-to-one correspondence. The ratio of the vertical distance L between the center of the fan and the side wall of the partition cavity to the radius r of the fan impeller is (1.2-1.5):1.

[0017] Furthermore, the second air outlet is arranged directly opposite to the heat sink;

[0018] The electrical box is further provided with a water baffle, which is arranged below the second air outlet, and the orthographic projection of the water baffle on the bottom surface of the electrical box completely covers the second air outlet.

[0019] Furthermore, the electrical box is provided with a side plate, and the side plate and the air guide cover are arranged to form an air duct; one side of the heat sink is fixedly connected to the driving plate, and the other side opposite thereto abuts against the side plate;

[0020] One end of the water baffle away from the side plate is tilted downward and is spaced apart from the bottom of the electrical box to form an air inlet; one end of the water baffle close to the side plate abuts against the bottom of the electrical box.

[0021] Furthermore, the four sides of the top cover protrude from the top edge of the electrical box; the top cover has at least one set of opposite side edges tilted downward to form two inclined surfaces, and the edge of the electrical box located below the inclined surfaces is spaced apart from the inclined surfaces.

[0022] Furthermore, the top cover also includes a connecting piece, and the top cover is fixedly connected to the electrical box via the connecting piece.

[0023] A heat pump comprises the heat dissipation structure of the electric control box drive plate described in the utility model.

[0024] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0025] (1) Through the built-in air duct and the reasonable design of the air flow path of the electric control box, the heat generated during the operation of the driver board is discharged in a centralized manner to avoid the formation of turbulence in the air flow inside the electric control box, so as to improve the heat dissipation efficiency of the driver board;

[0026] (2) By setting the air duct to a structure that gradually expands from the middle to both ends, the air flow field can be optimized so that the air flow can exchange heat with the heat dissipation components arranged in the heat exchange section at a high speed;

[0027] (3) By installing multiple fans, it is possible to maintain a large air volume while effectively reducing noise;

[0028] (4) By providing a partition cavity and placing the fans in the partition cavity one by one, the eddy current pressure drop loss caused by the excessive wind speed of a single fan can be effectively avoided.

[0029] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the structure of the electric control box provided in the embodiment of the present application;

[0031] Figure 2 A partial cross-sectional view of the heat dissipation structure of the electric control box drive board provided in an embodiment of the present application;

[0032] Figure 3 for Figure 2 A partial enlarged view of

[0033] Figure 4 Cross-section view of the heat dissipation structure of the electric control box drive board Figure 2 .

[0034] In the figure: 100-electric control box; 11-top cover; 111-inclined surface; 112-connecting piece; 12-electrical box; 121-first air outlet; 122-second air outlet; 123-side panel; 124-water retaining plate; 13-air inlet; 14-air outlet; 20-air guide cover; 30-air duct; 31-air inlet section; 32-heat exchange section; 33-air outlet section; 40-driving plate; 50-heat dissipation assembly; 51-heat dissipation element; 52-fan; 53-partition chamber. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, it should be noted that the terms "vertical direction", "upper", "lower", "horizontal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium, or the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The traditional heat pump unit electrical control box cooling methods mainly include natural cooling, fluorine cooling and ordinary fan cooling. Although these cooling methods are simple and reliable, they have low cooling efficiency and cannot meet the needs of long-term operation of high-power heat pump units, affecting the stability and life of the heat pump units.

[0039] Based on this, the embodiment of the present application provides a heat dissipation structure for a driving board, which is one of the largest heat sources in the electrical control box. Through the built-in air duct and the reasonable design of the air flow path in the electrical control box, the heat generated during the operation of the driving board is discharged in a centralized manner to avoid turbulence of the hot air flow inside the electrical control box, thereby improving the heat dissipation efficiency.

[0040] See also Figure 1-4The embodiment of the present application provides a heat dissipation structure of an electric control box drive board, including: an electric control box 100 provided with an electric box 12 and a top cover 11, an air guide cover 20, a drive board 40, and at least one set of heat dissipation components 50. A first air outlet 121 is provided on the top of the electric box 12, and a second air outlet 122 is provided on the bottom thereof, one of which is an air inlet and the other is an air outlet. The top cover 11 is arranged above the electric box 12, and is spaced apart from the electric box 12 to form an exhaust port 14. The orthographic projection of the top cover 11 in the plane of the first air outlet 121 completely covers the first air outlet 121, which is used to block external rainwater and prevent external rainwater from dripping into the electric box 12 through the first air outlet 121 to cause a short circuit.

[0041] The air duct 20 is disposed in the electrical box 12, and an air duct 30 is disposed in the air duct 20, or the air duct 20 and the electrical box 12 are surrounded to form an air duct 30, and the two ends of the air duct 30 are respectively disposed toward the first air port 121 and the second air port 122, so as to form an air flow path. The second air port 122 is defined as the air inlet, and the first air port 121 is the air outlet. The air flow enters the air duct 30 through the second air port 122, and then is discharged to the outside of the electrical box 12 through the first air port 121, and finally is discharged to the outside of the electrical control box 100 through the exhaust port 14.

[0042] The heat dissipation component 50 is fixedly connected to the driving plate 40 , and is disposed together with the driving plate 40 in the air duct 30 . External cold airflow directly enters the air duct 30 , exchanges heat with the heat dissipation component 50 , and then is blown out to the outside of the electrical box 12 .

[0043] The heat dissipation structure of a drive board of an electric control box provided in an embodiment of the present application, through a built-in air duct 30 and a reasonably designed air flow path of the electric control box 100, centrally discharges the heat generated during the operation of the drive board 40, avoids the formation of turbulence in the air flow inside the electric control box 100, and improves the heat dissipation efficiency.

[0044] See also Figure 2-4 Furthermore, in some embodiments, all sides of the top cover 11 protrude from the top edge of the electrical box 12, and the top cover 11 has at least one set of opposite side edges that are inclined downward to form two inclined surfaces 111. Preferably, the two inclined surfaces 111 are symmetrically arranged. The edge of the electrical box 12 located below the inclined surface 111 is spaced apart from the inclined surface 111 to form an exhaust port 14. This arrangement makes the top cover 11 present a triangular eave structure, which is conducive to rainwater flowing down the inclined surface 111. At the same time, the hot air flow that has been heat exchanged by the heat dissipation component 50 is blown out from the first air outlet 121 to the inclined surface 111. In the case of ice and snow in winter, the hot air flow helps to melt the ice and snow, and will not cause rain and snow to accumulate and damage the electrical control box 100.

[0045] Furthermore, the top cover 11 further includes connecting members 112 , which are disposed at two ends of the top cover 11 in the length direction. The two ends of the top cover 11 in the length direction are fixedly connected to the electrical box 12 through the connecting members 112 .

[0046] Further, in some embodiments, the two ends of the air duct 30 are respectively vertically abutted against the top and the bottom of the electrical box 12. Specifically, the air duct 30 is provided with a heat exchange section 32, and an air inlet section 31 and an air outlet section 33 extending outward from both ends of the heat exchange section 32, and the diameter of the air inlet section 31 gradually shrinks along the air flow direction, and the diameter of the air outlet section 33 gradually expands along the air flow direction, that is, the diameter of the heat exchange section 32 is smaller than the diameters of the air inlet section 31 and the air outlet section 33; the heat dissipation component 50 is provided in the heat exchange section 32. Under this setting, after the external cold air flow enters the air duct 30, it is first guided through the air inlet section 31. The aperture of the air inlet section 31 is continuously contracted, and the air flow is continuously accelerated until a high-speed air flow is formed to enter the heat exchange section 32. After the high-speed air flow undergoes heat exchange in the heat exchange section 32, a hot air flow is formed and is blown out to the air outlet section 33. Since the aperture of the air outlet section 33 gradually expands, the expanded hot air can be quickly blown out to the outside of the electrical box 12 through the air outlet section 33, thereby achieving heat dissipation for the drive plate 40.

[0047] In some embodiments, the expansion angle of the air inlet section 31 relative to the heat exchange section 32 is 10 to 60 degrees. It is understandable that when the expansion angle is too small, the acceleration effect of the cold air flow is not good; when the expansion angle is too large, the cold air flow will encounter the hot air flow in the heat exchange section 32 when entering the constriction of the heat exchanger, which will produce a large vortex, thereby limiting the flow rate of the air flow in the heat exchange section 32. Within the range of 10 to 60 degrees, the cold air flow is stably accelerated in the air inlet section 31, and the air flow is stable and high-speed when entering the heat exchange section 32, and it is not easy to generate vortices when entering the constriction of the heat exchange section 32, which affects the heat exchange efficiency.

[0048] The expansion angle of the air outlet section 33 relative to the heat exchange section 32 is 30-75°. Within this range, the hot air flow of the heat exchange section 32 can be quickly discharged after entering the gradually larger diameter, thereby improving the heat dissipation efficiency. When the expansion angle of the air outlet section 33 is too small, the diffusion efficiency of the expanded hot air flow is low; when the expansion angle of the air outlet section 33 is too large, the guiding effect of the air outlet section 33 is insufficient, and the air flow cannot be discharged to the outside of the electrical box 12 through the first air outlet 121 at a faster speed.

[0049] Furthermore, in some embodiments, the ratio of the heights of the air inlet section 31, the heat exchange section 32 and the air outlet section 33 is (0.3-0.5):1:(0.1-0.4). Within this height ratio range, it is also beneficial for the airflow to be accelerated in the air inlet section 31, and to smoothly enter the heat exchange section 32 to exchange heat with the heat dissipation component 50, and then be quickly blown out from the air outlet to the outside of the electrical box 12, thereby improving the overall heat dissipation efficiency of the drive plate 40.

[0050] Furthermore, in some embodiments, the heat dissipation assembly 50 includes a heat dissipation element 51 and a fan 52. The heat dissipation element 51 is provided with a plurality of airflow channels parallel to the airflow direction. The air inlet end of the fan 52 is arranged for the airflow channel, that is, the fan 52 is arranged between the heat dissipation element 51 and the top of the electrical box 12 to extract the hot airflow after heat exchange from the airflow channel. As an example, the heat dissipation element 51 can be integrated by an array of heat dissipation fins, and the airflow channels are formed between the heat dissipation fins; the heat dissipation element 51 can also be in the form of a porous grid, which is not limited here.

[0051] Furthermore, in some embodiments, the number of fans 52 can be multiple and arranged in parallel, so that the output power of a single fan 52 can be reduced, and the speed of the fan 52 can be reduced while maintaining a large air volume, thereby reducing noise. In this arrangement, the heat dissipation component 50 is also provided with a plurality of partition chambers 53, which are arranged between the heat dissipation element 51 and the top of the electrical box 12, and the fans 52 are arranged in the partition chambers 53 one by one. In this way, a single fan 52 is configured with an independent wind chamber, which can effectively avoid the eddy pressure drop loss caused by the excessive wind speed of a single fan 52, and the wind field drag reduction effect is good. Specifically, the ratio of the vertical distance L between the center of the fan 52 and the side wall of the partition chamber 53 to the impeller radius r of the fan 52 is (1.2 to 1.5): 1. Within this ratio range, while the eddy current can be effectively reduced, there can be enough space in the partition chamber 53 to accommodate the airflow to ensure a suitable airflow field.

[0052] Further, in some embodiments, the second air vent 122 is disposed directly below the heat sink 51 to ensure the flow field of the incoming air flow. A water baffle 124 is also disposed at the bottom of the electrical box 12 to prevent water droplets from splashing and entering the electrical box 12 through the second air vent 122 to cause a short circuit. Specifically, the water baffle 124 is disposed directly below the second air vent 122, and the orthographic projection of the water baffle 124 on the bottom surface of the electrical box 12 completely covers the second air vent 122.

[0053] See also Figure 2-4 In this embodiment, the electrical box 12 is provided with a side plate 123, the air guide cover 20 and the side plate 123 are arranged to form an air duct 30, one side of the heat sink 51 is fixed to the drive plate 40, and the other side opposite thereto is abutted against the side plate 123, so that the heat sink 51 and the drive plate 40 are completely attached to the side wall of the heat exchange section 32 of the air duct 30. In this arrangement, the side of the water baffle 124 away from the side plate 123 is tilted downward, and is spaced apart from the bottom of the electrical box 12 to form the air inlet 13. By tilting one side of the water baffle 124 downward, the area of ​​the air inlet 13 can be increased, thereby increasing the air intake. The end of the water baffle 124 close to the side plate 123 is abutted against the bottom of the electrical box 12. Specifically, the end of the water baffle 124 close to the side plate 123 is provided with a folded edge, and is fixed to the bottom of the electrical box 12 through the folded edge.

[0054] The embodiment of the present application also provides a heat pump, which is provided with the heat dissipation structure of the above-mentioned electric control box drive board, and improves the stability of the heat pump operation by centrally discharging the heat of the drive board with larger heat generation.

[0055] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0056] (1) Through the built-in air duct and the reasonable design of the air flow path of the electric control box, the heat generated during the operation of the driver board is discharged in a centralized manner to avoid the formation of turbulence in the air flow inside the electric control box, so as to improve the heat dissipation efficiency of the driver board;

[0057] (2) By setting the air duct to a structure that gradually expands from the middle to both ends, the air flow field can be optimized so that the air flow can exchange heat with the heat dissipation components arranged in the heat exchange section at a high speed;

[0058] (3) By installing multiple fans, it is possible to maintain a large air volume while effectively reducing noise;

[0059] (4) By providing a partition cavity and placing the fans in the partition cavity one by one, the eddy current pressure drop loss caused by the excessive wind speed of a single fan can be effectively avoided.

[0060] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A heat dissipation structure of an electric control box drive board, characterized in that: include: Electrical boxes and top covers; The top cover is arranged above the electrical box and is spaced apart from the electrical box to form an exhaust port; a first air port is arranged on the top of the electrical box and a second air port is arranged on the bottom; the orthographic projection of the top cover in the plane of the first air port completely covers the first air port; An air guide cover is arranged in the electrical box; the air guide cover is provided with an air duct, or the air guide cover and the electrical box are arranged to form an air duct, and two ends of the air duct are arranged toward the first air outlet and the second air outlet respectively; The driving plate and at least one group of heat dissipation components fixedly connected to the driving plate are both arranged in the air duct.

2. The heat dissipation structure of the electric control box drive board according to claim 1 is characterized in that: The two ends of the air duct are respectively vertically abutted against the top and bottom of the electrical box; The air duct is provided with a heat exchange section, and an air inlet section and an air outlet section extending outward at both ends of the heat exchange section; the diameter of the air inlet section gradually shrinks along the air flow direction, and the diameter of the air outlet section gradually expands along the air flow direction; the heat dissipation component is arranged in the heat exchange section.

3. The heat dissipation structure of the electric control box drive board according to claim 2 is characterized in that: The expansion angle of the air inlet section relative to the heat exchange section is 10 to 60 degrees; the expansion angle of the air outlet section relative to the heat exchange section is 30 to 75 degrees; The ratio of the heights of the air inlet section, the heat exchange section, and the air outlet section is (0.3-0.5):1:(0.2-0.4).

4. The heat dissipation structure of the electric control box drive board according to claim 2 is characterized in that: The heat dissipation assembly is provided with a heat dissipation element and a fan. The heat dissipation element is provided with a plurality of air flow channels parallel to the air flow direction. The air inlet end of the fan is arranged opposite to the air flow channel.

5. The heat dissipation structure of the electric control box drive board according to claim 4 is characterized in that: The heat dissipation assembly is further provided with a plurality of partition chambers, wherein the partition chambers are provided between the heat dissipation element and the top of the electrical box; There are multiple fans, which are arranged in the partition cavity in a one-to-one correspondence. The ratio of the vertical distance L between the center of the fan and the side wall of the partition cavity to the radius r of the fan impeller is (1.2-1.5):

1.

6. The heat dissipation structure of the electric control box drive board according to claim 4 is characterized in that: The second air outlet is arranged directly opposite to the heat sink; The electrical box is further provided with a water baffle, which is arranged below the second air outlet, and the orthographic projection of the water baffle on the bottom surface of the electrical box completely covers the second air outlet.

7. The heat dissipation structure of the electric control box drive board according to claim 6 is characterized in that: The electrical box is provided with a side plate, and the side plate and the air guide cover are arranged to form an air duct; one side of the heat sink is fixedly connected to the driving plate, and the other side opposite thereto abuts against the side plate; One end of the water baffle away from the side plate is tilted downward and is spaced apart from the bottom of the electrical box to form an air inlet; one end of the water baffle close to the side plate abuts against the bottom of the electrical box.

8. The heat dissipation structure of the electric control box drive board according to claim 1 is characterized in that: The top cover protrudes around the top edge of the electrical box; the top cover has at least one set of opposite side edges that tilt downward to form two inclined surfaces, and the edge of the electrical box below the inclined surfaces is spaced apart from the inclined surfaces.

9. The heat dissipation structure of the electric control box drive board according to claim 8 is characterized in that: The top cover also includes a connecting piece, and the top cover is fixedly connected to the electrical appliance box through the connecting piece.

10. A heat pump, characterized in that: include: The heat dissipation structure of the electric control box drive board as described in any one of claims 1-9.

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