Variable frequency controller with cooling structure

Abstract

The utility model provides a variable-frequency controller with a cooling structure, which comprises a variable-frequency controller, a radiating plate is arranged on a back plate of the variable-frequency controller, a controller radiating pipe is arranged on one surface, far away from the variable-frequency controller, of the radiating plate, and a heat-conducting fin is arranged between the radiating plate and the controller radiating pipe. Heat of the variable-frequency controller is led out to the controller radiating pipe through the radiating plate and the heat conducting piece, the controller radiating pipe is connected with the refrigerator and the refrigeration compressor, the refrigeration compressor is used for refrigerating the refrigerator and helping the variable-frequency controller to radiate heat, the variable-frequency controller is prevented from losing efficacy due to high temperature, and the reliability of the variable-frequency controller is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to refrigeration technical field especially relates to a variable frequency controller with cooling structure. BACKGROUND

[0002] As an important component of refrigeration compressor, the variable frequency controller can continuously adjust and control the speed of the refrigeration compressor, has the effects of temperature control and energy saving, and plays a crucial role in the performance and efficiency of the refrigeration compressor. The power components of the variable frequency controller generate a large amount of heat, especially the main chip and IGBT. Since the working environment of the refrigerator compressor is special, the variable frequency controller requires airtight sealing and cannot be provided with heat-conducting holes to prevent condensed water and small insects from entering the inside of the controller, which causes poor heat dissipation of the variable frequency controller and high temperature of the internal components. The high temperature during normal operation of the compressor will also transfer heat to the variable frequency controller, further deteriorating the environment of the controller. Especially in summer, the ambient temperature is high, the compressor needs more power to operate, and the temperature of the compressor itself is also higher. The three situations superimpose and further increase the temperature of the variable frequency controller. In summer, the variable frequency controller often fails due to high temperature, and reducing the temperature of the variable frequency controller can greatly improve its reliability.

[0003] The prior art CN221748807U discloses a cooling and heat dissipation type variable frequency controller, which relates to the technical field of variable frequency controllers and specifically comprises a variable frequency controller body, track rods fixed to the top and both sides of the variable frequency controller body, and heat-conducting plates clamped to the surfaces of the track rods. By setting the heat-conducting plates, heat dissipation fins and heat dissipation fans, the heat-conducting plates are clamped on the track rods and attached to the sides of the variable frequency controller body for heat conduction. Then, heat is conducted to the heat-conducting plates through the heat dissipation holes and the sides of the variable frequency controller body. Subsequently, the heat is conducted to the heat dissipation fins, and the started heat dissipation fans rotate to blow the heat on the heat dissipation fins, so that the heat on the heat dissipation fins is quickly carried away by the airflow. Through the continuous heat dissipation of the heat dissipation fins, the effect of quickly cooling and heat dissipating the variable frequency controller body is achieved, and the problem that the conventional heat dissipation of the existing variable frequency controller cannot meet the heat dissipation of the variable frequency controller under high power is solved. SUMMARY

[0004] The power components of the variable frequency controller generate a large amount of heat, especially the main chip and IGBT. Since the working environment of the refrigerator compressor is special, the variable frequency controller requires airtight sealing and cannot be provided with heat-conducting holes to prevent condensed water and small insects from entering the inside of the controller, which causes poor heat dissipation of the variable frequency controller and high temperature of the internal components. The high temperature during normal operation of the compressor will also transfer heat to the variable frequency controller, further deteriorating the environment of the controller.

[0005] To solve the above technical problems, the utility model provides a technical scheme for a frequency converter with a cooling structure, which comprises a frequency converter, a heat dissipation plate arranged on the back plate of the frequency converter, a controller heat dissipation pipe arranged on the side of the heat dissipation plate away from the frequency converter, and a heat conduction sheet arranged between the heat dissipation plate and the controller heat dissipation pipe.

[0006] Specifically, the controller heat dissipation pipe can be U-shaped, and the heat conduction sheet is provided with a U-shaped groove corresponding to the structure of the controller heat dissipation pipe.

[0007] Specifically, the controller heat dissipation pipe can be S-shaped, and the heat conduction sheet is provided with an S-shaped groove corresponding to the structure of the controller heat dissipation pipe.

[0008] Specifically, the controller heat dissipation pipe is fixed to the heat dissipation plate through an elastic patch. The groove with a corresponding structure arranged on the heat conduction sheet and the controller heat dissipation pipe can make the heat conduction sheet and the controller heat dissipation pipe fully contact and accelerate the heat transfer efficiency. The fixing mode of the elastic patch makes the installation of the controller heat dissipation pipe more convenient.

[0009] Specifically, the frequency converter comprises a frequency converter shell, a circuit board arranged in the frequency converter shell, power elements and electronic elements arranged on the circuit board.

[0010] Specifically, the frequency converter shell comprises a controller front shell and a controller rear cover, the controller front shell and the controller rear cover are fixed through buckle connection, and the heat dissipation plate is fixed to the controller rear cover through screws; the side of the controller shell away from the heat dissipation plate is fixed to a refrigeration compressor through buckles.

[0011] Specifically, the side of the controller front shell close to the refrigeration compressor is provided with a first opening, and the internal circuit of the frequency converter is connected to the refrigeration compressor through the first opening; the side surface of the controller front shell is also provided with a second opening, and the internal circuit of the frequency converter is connected to a refrigerator through the second opening.

[0012] Specifically, the pipe diameter of the controller heat dissipation pipe is consistent with the pipe diameter of a return air pipe of the refrigerator and an air suction pipe of the refrigeration compressor, one end of the controller heat dissipation pipe is connected to the refrigeration compressor, and the other end is connected to the refrigerator. After the heat is transferred to the controller heat dissipation pipe from the frequency converter through the heat dissipation plate and the heat conduction sheet, the controller heat dissipation pipe can be cooled through the pipe for providing refrigeration to the refrigerator by the refrigeration compressor, so that the refrigeration compressor can cool the refrigerator while cooling the frequency converter.

[0013] The utility model has the advantages that the heat dissipation plate and the heat conduction sheet are used to guide the heat of the frequency converter to the controller heat dissipation pipe, the controller heat dissipation pipe is connected to the refrigerator and the refrigeration compressor, the frequency converter is cooled while the refrigeration compressor is used to cool the refrigerator, the failure of the frequency converter caused by high temperature is avoided, and the reliability of the frequency converter is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the overall structure explosion schematic view of the frequency converter controller in the embodiment of the utility model.

[0015] Figure 2 It is the frequency converter controller cooling structure schematic view in the embodiment of the utility model.

[0016] Figure 3 It is the frequency converter controller cooling structure radiating pipe schematic view in the embodiment of the utility model.

[0017] In the drawing, 1 is the controller front shell, 1.1 is the buckle, 1.2 is the first opening, 1.3 is the second opening, 2.1 is the circuit board, 2.2 is the electronic component, 2.3 is the power component, 3 is the controller back cover, 4 is the radiating plate, 5 is the heat conduction sheet, 5.1 is the U-shaped groove, 6 is the controller radiating pipe, 7 is the elastic patch, 8 is the screw. Specific implementation

[0018] The utility model will be explained in detail below in combination with the drawings and examples.

[0019] Example one: a kind of frequency converter controller with cooling structure, as shown in Figure 1 And Figure 2 Shown, including frequency converter controller, frequency converter controller backplate is equipped with radiating plate 4, radiating plate 4 is equipped with controller radiating pipe 6 on the side away from frequency converter controller, and heat conduction sheet 5 is equipped between radiating plate 4 and controller radiating pipe 6.

[0020] As an important component of refrigeration compressor, frequency converter controller can continuously adjust the speed of refrigeration compressor, has the effects of temperature control and energy saving, and plays a crucial role in the performance and efficiency of refrigeration compressor. The power components of frequency converter controller generate a large amount of heat, especially the main chip and IGBT. Due to the special working environment of refrigerator compressor, frequency converter controller requires sealing and cannot have heat-conducting holes to prevent condensed water and small insects from entering the interior of the controller, which causes poor heat dissipation of frequency converter controller and high temperature of internal components. The high temperature of the compressor during normal operation also transfers heat to the frequency converter controller, further deteriorating the environment of the controller. Especially in summer, the ambient temperature is high, the compressor needs more power, and the temperature of the compressor itself is also higher. The three situations superimpose and further increase the temperature of the frequency converter controller. In summer, the frequency converter controller often fails due to high temperature, and reducing the temperature of the frequency converter controller can greatly improve its reliability.

[0021] Therefore, the heat inside the frequency converter controller is conducted out of the controller radiating pipe 6 through the radiating plate 4 and the heat conduction sheet 5, and then the heat is discharged through the controller radiating pipe 6.

[0022] In this embodiment, the controller heat dissipation pipe 6 is U-shaped, and the heat conduction sheet 5 is provided with a U-shaped groove 5.1 corresponding to the structure of the controller heat dissipation pipe 6. The heat conduction sheet 5 and the controller heat dissipation pipe 6 are provided with corresponding grooves, which are easy to assemble and position, and can make the heat conduction sheet 5 and the controller heat dissipation pipe 6 fully contact, thereby accelerating the heat transfer efficiency. The controller heat dissipation pipe 6 is fixed on the heat dissipation plate 4 through the elastic sheet 7. The fixing mode of the elastic sheet 7 makes the installation of the controller heat dissipation pipe 6 more convenient.

[0023] As shown in Figure 3 The elastic sheet 7 is divided into upper and lower sheets, and the shapes of the two sides of the sheet are consistent with the pipe diameter, which is slightly larger than the pipe diameter and does not interfere with the installation of other components. There are threaded holes on the upper sheet, which can further strengthen the fixation of the controller heat dissipation pipe 6. The heat dissipation plate 4 on the controller rear cover 3 is also positioned and fixed through the threaded holes, which is easy to install and disassemble, and can shorten the assembly process.

[0024] The frequency conversion control shell is provided with a circuit board 2.1, and the upper surface of the circuit board 2.1 is provided with a plurality of power components and electronic components. The power components 2.3 and the electronic components 2.2 are attached to the back side of the controller shell towards the refrigeration compressor, and are fixed through the buckle 1.1. The controller shell is a square shell and is divided into front and rear shells. The controller front shell 1 is provided with two openings. The first opening 1.2 is arranged on the side of the controller front shell 1 close to the refrigeration compressor, and the internal circuit of the frequency conversion controller is connected to the refrigeration compressor through the first opening 1.2. The second opening 1.3 is also arranged on the side of the controller front shell 1, and the internal circuit of the frequency conversion controller is connected to the refrigerator through the second opening 1.3.

[0025] The frequency conversion controller shell includes the controller front shell 1 and the controller rear cover 3. The controller front shell 1 and the controller rear cover 3 are connected and fixed through the buckle 1.1. The heat dissipation plate 4 is fixed on the controller rear cover 3 through the screw 8. The side of the controller shell away from the heat dissipation plate 4 is fixed on the refrigeration compressor through the buckle 1.1.

[0026] The connection line between the refrigeration compressor and the controller is connected to the refrigeration compressor and the controller through the first opening 1.2 close to the refrigeration compressor. The connection line between the controller and the refrigerator is connected to the controller and the refrigerator through the second opening 1.3 on the side. The controller shell is fixed on the refrigeration compressor through the buckle 1.1. The controller is placed in the controller rear shell. The controller front shell 1 and the controller rear cover 3 are bonded by glue or fixed by the buckle 1.1. The heat dissipation plate 4 is attached to the back of the controller rear shell. Part of the heat in the controller shell can be transferred out of the shell, thereby reducing the temperature in the controller. The heat dissipation plate 4 is fixed on the controller rear shell through the screw 8.

[0027] The heat-conducting sheet 5 has strong plasticity and heat-conducting property, and is attached to the heat-dissipating plate 4. The U-shaped groove on the heat-conducting sheet 5 is consistent with the shape of the controller heat-dissipating pipe 6, so that the heat-conducting sheet 5 is easily assembled and positioned. The other side of the heat-conducting sheet 5 is closely attached to the controller heat-dissipating pipe 6 and has sufficient surface contact, so that the heat on the heat-dissipating plate 4 is further transmitted to the controller heat-dissipating pipe 6.

[0028] The pipe diameter of the controller heat-dissipating pipe 6 is consistent with the pipe diameter of the refrigerator return pipe and the refrigeration compressor suction pipe. One end of the controller heat-dissipating pipe 6 is connected to the refrigeration compressor, and the other end is connected to the refrigerator. The heat from the frequency conversion controller is transmitted to the controller heat-dissipating pipe 6 through the heat-dissipating plate 4 and the heat-conducting sheet 5, and then is dissipated by using the pipe for providing refrigeration to the refrigerator by the refrigeration compressor, so that the refrigeration compressor provides refrigeration to the refrigerator while achieving the effect of cooling and dissipating heat for the frequency conversion controller.

[0029] The pipe diameter of the controller heat-dissipating pipe 6 is consistent with the pipe diameter of the refrigerator return pipe and the refrigeration compressor suction pipe. One end of the controller heat-dissipating pipe 6 is connected to the refrigerator, and the other end is connected to the refrigeration compressor. One side of the controller heat-dissipating pipe 6 is closely attached to the heat-conducting sheet 5, and the other side is fixed to the rear shell of the controller by two elastic sheets 7. The temperature of the controller heat-dissipating pipe 6 is lower than the temperature of the controller shell. The heat transmitted from the heat-dissipating plate 4 can be effectively transmitted to the outside through the controller heat-dissipating pipe 6. The controller heat-dissipating pipe 6 is a copper pipe, which can greatly enhance the heat transfer efficiency.

[0030] The heat from the frequency conversion controller is transmitted to the controller heat-dissipating pipe 6 through the heat-dissipating plate 4 and the heat-conducting sheet 5. The controller heat-dissipating pipe 6 is connected to the refrigerator and the refrigeration compressor. The refrigeration compressor provides refrigeration to the refrigerator while helping the frequency conversion controller dissipate heat, so that the frequency conversion controller is prevented from failing due to high temperature, and the reliability of the frequency conversion controller is increased.

[0031] Embodiment two: a frequency conversion controller with a cooling structure, comprising a frequency conversion controller, a heat-dissipating plate 4 arranged on the back plate of the frequency conversion controller, a controller heat-dissipating pipe 6 arranged on the side of the heat-dissipating plate 4 away from the frequency conversion controller, and a heat-conducting sheet 5 arranged between the heat-dissipating plate 4 and the controller heat-dissipating pipe 6.

[0032] As an important component of the refrigeration compressor, the variable frequency controller can continuously adjust and control the speed of the refrigeration compressor, has the effects of temperature control and energy saving, and plays a crucial role in the performance and efficiency of the refrigeration compressor. The power components of the variable frequency controller generate a large amount of heat, especially the main chip and IGBT. Due to the special working environment of the refrigerator compressor, the variable frequency controller requires sealing and cannot be provided with heat-conducting holes to prevent condensed water and small insects from entering the inside of the controller, resulting in poor heat dissipation of the variable frequency controller and high temperature of the internal components. The high temperature of the compressor during normal operation also transmits heat to the variable frequency controller, further deteriorating the environment of the controller. Especially in summer, the ambient temperature is often high, the compressor needs more power, and the temperature of the compressor itself is also higher. The three situations superimpose and further increase the temperature of the variable frequency controller. In summer, the variable frequency controller often fails due to high temperature. Reducing the temperature of the variable frequency controller can greatly improve its reliability.

[0033] Therefore, the heat inside the variable frequency controller is conducted out to the controller heat dissipation pipe 6 through the heat dissipation plate 4 and the heat conduction sheet 5, and then the heat is discharged through the controller heat dissipation pipe 6.

[0034] In this embodiment, the controller heat dissipation pipe 6 is S-shaped, and the heat conduction sheet 5 is provided with an S-shaped groove corresponding to the structure of the controller heat dissipation pipe 6. The heat conduction sheet 5 and the controller heat dissipation pipe 6 are provided with corresponding grooves, which are easy to assemble and position, and can make the heat conduction sheet 5 and the controller heat dissipation pipe 6 fully contact and accelerate the heat transfer efficiency. The controller heat dissipation pipe 6 is fixed on the heat dissipation plate 4 by the elastic patch 7. The fixing mode of the elastic patch 7 makes the installation of the controller heat dissipation pipe 6 more convenient.

[0035] The elastic patch 7 is divided into upper and lower patches, and the shapes of the two sides of the patch are consistent with the pipe diameter which is slightly larger than the pipe diameter and does not interfere with the installation of other components. There are threaded holes on the upper patch, which can further strengthen the fixation of the controller heat dissipation pipe 6. The heat dissipation plate 4 on the rear cover 3 of the controller is also positioned and fixed by the threaded holes, which is easy to install and disassemble, and can shorten the assembly process.

[0036] The heat conduction sheet 5 has strong plasticity and heat conductivity, one side is pasted on the heat dissipation plate 4, and the other side is tightly pasted on the controller heat dissipation pipe 6 and fully contacts the surface, which can further transfer the heat on the heat dissipation plate 4 to the controller heat dissipation pipe 6.

[0037] The variable frequency controller comprises a variable frequency controller shell, and the inside of the variable frequency controller shell is provided with a circuit board 2.1. The circuit board 2.1 is provided with power components 2.3 and electronic components 2.2.

[0038] Specifically, the frequency converter housing includes a front housing 1 and a rear cover 3, the front housing 1 and the rear cover 3 are connected and fixed by buckles 1.1, and the heat sink 4 is fixed on the rear cover 3 by screws 8; the side of the frequency converter housing away from the heat sink 4 is fixed on the refrigeration compressor by buckles 1.1.

[0039] Specifically, the front housing 1 of the controller is provided with a first opening 1.2 on the side close to the refrigeration compressor, and the internal circuit of the frequency converter is connected to the refrigeration compressor through the first opening 1.2; the front housing 1 of the controller is also provided with a second opening 1.3 on the side, and the internal circuit of the frequency converter is connected to the refrigerator through the second opening 1.3.

[0040] The power element 2.3 and the electronic element 2.2 are attached to the back side of the controller housing towards the refrigeration compressor, and are fixed by buckles 1.1. The controller housing is a square-shaped housing divided into front and rear housings, the front housing 1 of the controller has two openings, the connection line between the refrigeration compressor and the controller is connected by the first opening 1.2 close to the refrigeration compressor, and the connection line between the controller and the refrigerator is connected by the second opening 1.3 on the side, the controller housing is fixed on the refrigeration compressor by buckles 1.1, the controller is placed in the rear housing of the controller, the front housing 1 of the controller and the rear cover 3 are bonded by glue or fixed by buckles 1.1, and the heat sink 4 is attached to the back of the controller housing, so that part of the heat in the controller housing is transferred out of the shell, thereby reducing the temperature in the controller, and the heat sink 4 is fixed on the controller housing by screws 8.

[0041] Specifically, the diameter of the controller heat dissipation pipe 6 is consistent with the diameter of the refrigerator gas return pipe and the refrigeration compressor suction pipe, one end of the controller heat dissipation pipe 6 is connected to the refrigeration compressor, and the other end is connected to the refrigerator.

[0042] The diameter of the controller heat dissipation pipe 6 is consistent with the diameter of the refrigerator gas return pipe and the refrigeration compressor suction pipe, one end of the controller heat dissipation pipe 6 is connected to the refrigerator, and the other end is connected to the refrigeration compressor, one side of the controller heat dissipation pipe 6 is attached to the heat conduction sheet 5, and the other side is fixed on the rear housing of the controller by two elastic pads 7, the temperature of the controller heat dissipation pipe 6 is relatively low, and the temperature in the controller housing is much higher than that of the controller heat dissipation pipe 6, the heat transferred from the heat sink 4 can be effectively transferred to the outside through the controller heat dissipation pipe 6, and the controller heat dissipation pipe 6 is a copper pipe which can greatly enhance the heat transfer efficiency.

[0043] After the heat is transferred from the frequency converter to the controller heat dissipation pipe 6 through the heat sink 4 and the heat conduction sheet 5, the heat can be dissipated by using the pipe for providing refrigeration to the refrigerator by the refrigeration compressor, so that the refrigeration compressor can provide refrigeration to the refrigerator while achieving the effect of cooling and dissipating heat for the frequency converter.

[0044] The heat of the frequency conversion controller is led out to the controller radiating pipe 6 by the radiating plate 4 and the heat conducting sheet 5, the controller radiating pipe 6 is connected with the refrigerator and the refrigeration compressor, the refrigeration compressor helps the frequency conversion controller to radiate when refrigerating the refrigerator, the failure of the frequency conversion controller caused by high temperature is avoided, and the reliability of the frequency conversion controller is increased.

[0045] The above specific embodiments are only the preferred embodiments of the utility model, and not limit the specific implementation structure and implementation range of the utility model. In fact, some equivalent changes can be made according to the shape, structure and design purpose of the utility model. Therefore, all the equivalent changes made according to the shape, structure and design purpose of the utility model should be included in the protection scope of the utility model, that is, these equivalent changes should be protected by the utility model.

Claims

1. A variable frequency controller with a cooling structure, characterized in that, It includes a frequency converter, a heat sink is provided on the back panel of the frequency converter, a heat pipe is provided on the side of the heat sink away from the frequency converter, and a heat conduction plate is provided between the heat sink and the heat pipe.

2. The frequency converter with cooling structure according to claim 1, characterized in that, The controller's heat pipe is U-shaped, and the heat-conducting plate has a U-shaped groove corresponding to the structure of the controller's heat pipe.

3. The frequency converter with cooling structure according to claim 1, characterized in that, The controller's heat pipe is S-shaped, and the heat-conducting plate has an S-shaped groove corresponding to the structure of the controller's heat pipe.

4. The frequency converter with a cooling structure according to claim 2 or 3, characterized in that, The controller's heat pipe is fixed to the heat sink plate by a flexible patch.

5. The frequency converter with cooling structure according to claim 1, characterized in that, The frequency converter includes a frequency converter housing, inside which is a circuit board containing power components and electronic components.

6. The frequency converter with cooling structure according to claim 5, characterized in that, The inverter controller housing includes a front housing and a rear cover, which are fixed together by snap-fit ​​connections. The heat sink is fixed to the rear cover by screws. The side of the controller housing away from the heat sink is fixed to the refrigeration compressor by snap-fit ​​connections.

7. The frequency converter with cooling structure according to claim 6, characterized in that, The front casing of the controller has a first opening on the side near the refrigeration compressor, through which the internal wiring of the frequency converter is connected to the refrigeration compressor; the side of the front casing of the controller also has a second opening, through which the internal wiring of the frequency converter is connected to the refrigerator.

8. The frequency converter with a cooling structure according to claim 1, 2, or 3, characterized in that, The diameter of the controller's heat dissipation pipe is the same as that of the refrigerator's return pipe and the refrigeration compressor's suction pipe. One end of the controller's heat dissipation pipe is connected to the refrigeration compressor, and the other end is connected to the refrigerator.

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