Variable frequency box and refrigerator

Abstract

The utility model discloses a variable frequency box and refrigerator relates to the field of refrigeration equipment. Variable frequency box includes: box body, the box body is flat box body and is set up vertically, and the box body is opened in the side of the maximum surface area to form the open mouth, circuit board, circuit board is set up vertically in the box body, and the maximum surface of circuit board is towards the open mouth and is arranged, and at least one side of circuit board is equipped with power device, radiator, the main heat dissipation board of radiator is assembled at the open mouth, and the main heat dissipation board is connected with circuit board or power device to heat conduction. This variable frequency box not only simple structure can reduce the box body weight, and the heat dissipation effect is good, and the reliability is high, has certain waterproof effect.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment, and in particular to an inverter box and a freezer. Background Technology

[0002] Inverter boxes are used in compressor components of refrigeration equipment. The components inside the inverter box generate a significant amount of heat during operation, and if this heat is not dissipated in a timely manner, it will affect the normal operation of the inverter box. Therefore, there is room for improvement in how to enhance the heat dissipation effect of the inverter box. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a frequency converter box with good heat dissipation performance.

[0004] The second aspect of this application aims to provide a refrigerator having the aforementioned inverter box.

[0005] According to a first aspect of the present invention, a frequency converter box includes: a box body, the box body being a flat box body and vertically arranged, the box body being open on the side with the largest surface area to form an opening; a circuit board, the circuit board being vertically arranged inside the box body, the largest surface of the circuit board being arranged facing the opening, and a power device being provided on at least one side of the circuit board; and a heat sink, the heat sink including a main heat sink plate assembled at the opening, the main heat sink plate being connected to the circuit board or the power device for heat conduction.

[0006] According to the inverter box of the first aspect of this utility model, the radiator places the main heat sink plate at an open side of the box body to enclose the box body. On one hand, the box body has an open opening on the side facing the radiator, and the circuit board or power device is connected to the main heat sink plate. The main heat sink plate absorbs heat with the interior of the box body through contact heat exchange and radiation heat exchange, reducing the heat transfer path and improving the efficiency of heat transfer to the radiator. On the other hand, the main heat sink plate covers the open opening, and the heat exchange area between the inside and outside of the main heat sink plate is large. When external air flows through the main heat sink plate, it can carry away a large amount of heat, which can further improve the heat dissipation efficiency of the radiator. By using the main heat sink plate to enclose the box body, the box body does not need to be equipped with a separate box cover, which can reduce the weight of the box body and reduce the assembly process.

[0007] The casing, circuit board, and main heat sink are all vertically oriented. This design allows for a flatter casing, occupies less space, and reduces obstruction of airflow. Furthermore, it maximizes the heat dissipation area of ​​the radiator, improving its cooling efficiency. When water droplets fall onto the casing, circuit board, and main heat sink, the vertical orientation allows the water to flow downwards under gravity, facilitating drainage and preventing accumulation on the inverter's surface.

[0008] In some embodiments, the circuit board divides the cavity of the housing into a first cavity and a second cavity, wherein the thickness of the first cavity is greater than the thickness of the second cavity; The power device includes a first power device disposed in the first cavity and a second power device disposed in the second cavity, wherein at least a portion of the first power device has a height greater than all the second power devices.

[0009] In some specific embodiments, the first cavity is located on the side of the circuit board away from the main heat sink, and the second cavity is located between the circuit board and the main heat sink.

[0010] Specifically, the box body has through holes on its wall for threading wires, and the through holes are connected to the first cavity.

[0011] In some embodiments, the box wall of the box body is provided with through holes for threading wires. The through holes include a first through hole and a second through hole located on different sides of the box body. The wire at the first through hole is used for signal communication, and the wire at the second through hole is used to connect to the compressor body. The second through hole is lower than the first through hole.

[0012] Specifically, the box wall opposite to the opening of the box body protrudes in a direction away from the opening to form a boss box, and the second through hole is provided on the boss box; The boss box has a locking hole and a first connecting hole formed on both sides of the second through hole, respectively.

[0013] Optionally, the portion of the boss box located above the second through hole is formed as a slanted hanging plate in the downward direction away from the opening.

[0014] Furthermore, the second through hole is located on the side of the box body, and the first through hole is located on the top of the box body; the bottom of the box body is provided with connecting feet and plugs, the connecting feet are located on the side of the box body with the opening, and the plugs are located below the second through hole.

[0015] In some embodiments, the circuit board is arranged parallel to the main heat sink; the inner wall of the housing is provided with connecting protrusions, there are multiple connecting protrusions and they are arranged at intervals along the edge of the opening, each connecting protrusion is provided with a slot, the circuit board abuts against the multiple connecting protrusions, and the edge of the circuit board is located at the slot.

[0016] The freezer according to a second aspect of the present invention includes: a frequency converter box according to the above embodiment.

[0017] In some embodiments, the radiator further includes a secondary radiator connected to the main radiator, wherein the main radiator and the secondary radiator are located on different sides of the housing.

[0018] In some specific embodiments, the secondary heat sink is one that makes the heat sink L-shaped, and the heat sink further includes heat dissipation fins disposed on the main heat sink.

[0019] In other specific embodiments, there are two secondary heat sinks arranged opposite each other, so that the heat sink is U-shaped.

[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a front view of the inverter box in some embodiments; Figure 2 for Figure 1 Sectional view along the AA direction; Figure 3 for Figure 1 Cross-sectional view along the BB direction; Figure 4 for Figure 1 Sectional view along the CC direction; Figure 5 This is a top view of the structural layout of the freezer within the compressor compartment in some embodiments; Figure 6 This is a partial three-dimensional view of the inverter box inside the compressor compartment in some embodiments; Figure 7 This is an exploded view of the inverter box structure in some other embodiments of the present invention; Figure 8 This is a cross-sectional view of the inverter box in some other embodiments of the present invention; Figure 9 This is a cross-sectional view of the inverter box and compressor body after they are connected in some embodiments of the present invention. The internal structure of the box and compressor body is hidden in the figure. Figure 10 This is another structural view of the inverter box and compressor body in some embodiments of the present invention, which hides the internal structure of the radiator and inverter box.

[0022] Figure label: 10,000 freezers 100 frequency inverter boxes Box body 10, opening 11, socket 12, first side wall 13, inner box wall 132, outer box wall 133, heat dissipation vent 134, slot 135, second side wall 14, top side wall 151, bottom side wall 152, inner side wall 153, first through hole 172, second through hole 173, first cavity 191, second cavity 192, connecting protrusion 193, groove 194. Circuit board 20, power device 21, first power device 211, second power device 212, Radiator 30, main heat sink 31, secondary heat sink 32, heat sink fins 33 Insulating heat-conducting plate 37, thermally conductive silicone grease layer 38 60, boss box; 602, snap hole; 603, first connecting hole; 66, slanted hanging plate. Install fasteners 71. Pin 81, Connecting Pin 82 Compressor body 200, terminal block 201 Mounting base 500, clearance opening 501, support plate 510, first hook 520, upper folding plate 540, second hook 550 Compressor compartment V1, compartment bottom plate 710, upper baffle 721, bottom fastener 781. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0024] In the description of this utility model, it should be understood that the terms "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following is a reference appendix. Figures 1-10 The inverter box 100 according to an embodiment of the present utility model is described.

[0026] Combination Figures 1-2 According to a first aspect embodiment of the present invention, a frequency converter box 100 includes: a box body 10, a circuit board 20, and a heat sink 30. One side of the box body 10 has an opening 11, and the heat sink 30 includes a main heat sink 31 mounted at the opening 11. The circuit board 20 is installed inside the box body 10, and at least one side of the circuit board 20 has a power device 21.

[0027] Specifically, the housing 10 is a flat, vertically oriented box, with an opening 11 formed on the side with the largest surface area. The circuit board 20 is vertically positioned inside the housing 10, with its largest surface facing the opening 11. The main heat sink 31 is connected to the circuit board 20 or the power device 21 for heat conduction.

[0028] The inverter box 100 is used for controlling the inverter compressor in refrigeration equipment. An inverter compressor is a compressor whose cooling (or heating) capacity can be changed by adjusting the operating frequency of the motor; it is a core component of modern inverter air conditioners, refrigerators, and other refrigeration equipment. Its core characteristic is that its output power can dynamically change according to demand, unlike traditional fixed-frequency compressors that can only operate at a fixed frequency (such as 50Hz or 60Hz). The structure of the circuit board 20 and the power devices 21 within the inverter box 100 can adopt the structures of circuit boards and power devices known in the prior art for inverter boxes. No restrictions are placed on the specific wiring structure within the circuit board 20, or on the type, quantity, or location of the power devices 21. The circuit board 20 and the power devices 21 within the inverter box 100 are both prior art and not the technical content to be protected in this application; therefore, they will not be described in detail here.

[0029] The inverter box 100 has a circuit board 20 inside its housing 10. The power devices 21 mounted on the circuit board 20 generate a lot of heat during operation, requiring high heat dissipation. Insufficient heat dissipation of the power devices 21 may lead to a decrease in the operational stability of the circuit board 20, or even damage to the circuit board 20.

[0030] Therefore, the inverter box 100 of this embodiment is provided with a heat sink 30, which includes a main heat sink 31. The main heat sink 31 is located at the opening 11 to enclose the box body 10. On the one hand, the box body 10 is open on the side facing the heat sink 30, and the main heat sink 31 and the interior of the box body 10 absorb heat through contact heat exchange, radiation heat exchange, etc., reducing the heat transfer path and improving the efficiency of heat transfer to the heat sink 30. On the other hand, the main heat sink 31 covers the opening 11, and the area for heat exchange between the inside and outside of the main heat sink 31 is large. When external air flows through the main heat sink 31, it can carry away a large amount of heat, which can further improve the heat dissipation efficiency of the heat sink 30.

[0031] The main heat sink 31 is used to encapsulate the housing 10. The housing 10 does not need to be equipped with a separate cover, which can reduce the weight of the housing 10 and reduce the assembly process.

[0032] The housing 10, circuit board 20, and main heat sink 31 are all vertically oriented. This design helps to make the housing 10 flat, taking up less space and reducing the obstruction of airflow by the inverter box 100. Furthermore, the radiator 30 has a large usable heat dissipation area, which helps to improve its heat dissipation efficiency. When water droplets fall onto the housing 10, circuit board 20, and main heat sink 31, the vertical orientation allows the water to flow downwards under gravity, making it easy to drain and preventing accumulation on the surface of the inverter box 100.

[0033] To enhance heat dissipation, the heat sink 30 has an increased heat dissipation area in this application.

[0034] Specifically, the box body 10 is a box-shaped structure open on one side. For ease of description, the five side walls of the box body 10 are referred to as the first side wall 13, the second side wall 14, the top side wall 151, the bottom side wall 152, and the inner side wall 153. The top side wall 151 and the bottom side wall 152 both extend horizontally and are positioned opposite each other, with the top side wall 151 located above the bottom side wall 152. The first side wall 13 and the second side wall 14 both extend vertically and are located on either side of the opening 11 at the horizontal level. The inner side wall 153 is the side wall of the box body 10 opposite the opening 11 and is positioned vertically.

[0035] In some embodiments, such as Figures 1-8 As shown, the radiator 30 includes a secondary heat sink 32, which is connected to at least one side of the main heat sink 31 and is located on the side wall of the housing 10.

[0036] The secondary heat sink 32 can be a single unit, for example, in... Figure 2 In the example, the secondary heat sink 32 is located on the first side wall 13. One side of the main heat sink 31 is connected to the secondary heat sink 32, and the heat sink 30 is generally L-shaped. This leaves a side wall at the top and on the other side of the housing 10 for wiring, etc. There can also be two secondary heat sinks 32, for example, in... Figure 7In the example, two secondary heat sinks 32 are mounted on the top sidewall 151 and the bottom sidewall 152. In this case, the housing 10 needs to be suspended, for example, in... Figure 9 and Figure 10 By being installed on the compressor body 200, the bottom auxiliary heat sink 32 can be vented by air.

[0037] When the number of secondary heat sinks 32 is small, further, such as Figure 1 and Figure 2 As shown, the heat sink 30 also includes heat dissipation fins 33, which are located on the side of the main heat sink 31 away from the circuit board 20. This allows the heat dissipation fins 33 to increase the contact area with the air.

[0038] The main heat sink 31 and the auxiliary heat sink 32 are located on different sides of the inverter box 10, changing the inverter box 100 from single-sided heat dissipation to multi-sided heat dissipation. Moreover, when the external airflow direction changes, the radiator 30 uses the heat sinks on different sides to ensure that there is sufficient contact area with the airflow when the external airflow direction changes.

[0039] By setting heat dissipation fins 33, which are located on the side of the main heat sink 31 away from the circuit board 20, the heat dissipation fins 33 significantly increase the heat dissipation area and improve heat exchange efficiency. Furthermore, by optimizing the shape and arrangement of the heat dissipation fins 33, heat can be carried away more efficiently through air convection.

[0040] In some embodiments, such as Figure 2 and Figure 4 As shown, the housing 10 has an insertion slot 12 on the side wall where the secondary heat sink 32 is located, and the secondary heat sink 32 is inserted into the insertion slot 12. By using the insertion and engagement of the secondary heat sink 32 with the housing 10, the structure for installing the heat sink 30 can be reduced, thus simplifying the structure, saving materials for the housing 10, and reducing manufacturing costs. Here, the side wall of the housing 10 with the insertion slot 12 can be divided into an inner wall 132 and an outer wall 133. The inner wall 132 serves to block one side of the circuit board 20. The outer wall 133 is located on the side of the inner wall 132 away from the circuit board 20. Except for the insertion slot 12, the edges of the outer wall 133 are connected to the edges of the inner wall 132 on the other sides, forming a slot 135 between the outer wall 133 and the inner wall 132. The secondary heat sink 32 is located within the slot 135. Figure 2 Taking the orientation shown as an example, the outer box wall 133 and the inner box wall 132 are spaced apart on the right side to form an insertion opening 12. The outer box wall 133 and the inner box wall 132 are connected on the upper, lower and left sides to form a slot 135.

[0041] Specifically, such as Figure 6As shown, the outer box wall 133 has a heat dissipation vent 134 extending through its thickness to expose part of the secondary heat dissipation plate 32. By setting the heat dissipation vent 134, the contact area between the secondary heat dissipation plate 32 and the external airflow of the box body 10 can be increased, which is beneficial to improving the heat exchange between the secondary heat dissipation plate 32 and the external environment, and can improve the heat dissipation effect.

[0042] It is understandable that the first sidewall 13 can be configured with the aforementioned double-wall structure. When the secondary heat sink 32 is located on the upper and lower sides, as... Figure 7 As shown, the top sidewall 151 and the bottom sidewall 152 can also be configured as a double-wall structure to form a slot 135 for inserting the secondary heat sink 32.

[0043] By setting the first sidewall 13 in this way, the circuit board 20 can be limited, achieving a good seal inside the box 10 and reducing the risk of water, dust, and insects entering the box 10 through the first sidewall 13. Isolating the circuit board 20 from the external environment of the box 10 helps to improve the operational stability of the circuit board 20.

[0044] Moreover, this configuration allows for quick positioning of the radiator 30 during assembly.

[0045] Specifically, such as Figure 1 and 4 As shown, when the heat dissipation fins 33 are installed, they are vertically arranged elongated strips. When water vapor condenses on the heat dissipation fins 33, the water will flow downwards under the influence of gravity and be easily discharged. Moreover, when air flows towards the heat dissipation fins 33, it helps to guide the airflow upwards or downwards, increasing the airflow path, prolonging the contact time between the airflow and the heat dissipation fins 33, and improving the heat dissipation efficiency.

[0046] Furthermore, such as Figure 2 As shown, the surface of the heat dissipation fins 33 is provided with serrated patterns that extend vertically, which further helps to increase the heat dissipation area and also helps to guide the water flow downwards.

[0047] In some embodiments, such as Figure 2 and Figure 8 As shown, the inverter box 100 also includes an insulating heat-conducting plate 37, which is disposed on the side of the main heat sink 31 facing the circuit board 20.

[0048] Specifically, the side of the main heat sink 31 facing the circuit board 20 is flat, which facilitates the installation of the insulating heat-conducting plate 37.

[0049] An insulating heat-conducting plate 37 is provided between the main heat sink 31 and the circuit board 20, which can isolate the power device 21 on the circuit board 20 from the heat sink 30, thereby improving the safety and working stability of the frequency converter.

[0050] Specifically, such as Figure 2 As shown, at least one power device 21 is in contact with the insulating heat-conducting plate 37 for heat conduction. Contact heat conduction is more efficient than thermal radiation heat conduction, which can improve the heat dissipation efficiency of the inverter box 100.

[0051] Furthermore, such as Figure 2 As shown, at least one of a thermally conductive grease layer 38 and a thermally conductive adhesive layer is provided between at least one power device 21 and the insulating heat-conducting plate 37.

[0052] The power device 21 and the insulating heat-conducting plate 37 are connected by a thermally conductive silicone grease layer 38 and / or a thermally conductive adhesive layer, which improves heat transfer efficiency. Furthermore, the thermally conductive silicone grease layer 38 and / or the thermally conductive adhesive layer are insulating, enhancing the safety of the frequency converter. The inclusion of the thermally conductive silicone grease layer 38 and the thermally conductive adhesive layer strengthens the connection between the power device 21 and the insulating heat-conducting plate 37, improving overall structural strength and reducing vibration.

[0053] In some embodiments, such as Figure 2 As shown, the circuit board 20 divides the cavity of the housing 10 into a first cavity 191 and a second cavity 192. The thickness m1 of the first cavity 191 is greater than the thickness m2 of the second cavity 192. The thicknesses of the first cavity 191 and the second cavity 192 refer to their respective thicknesses in the direction of the inverter box 100 (e.g., ...). Figure 2 The dimension in the X direction.

[0054] The power device 21 includes a first power device 211 disposed in the first cavity 191 and a second power device 212 disposed in the second cavity 192. At least a portion of the first power device 211 has a height n1 greater than the height n2 of all the second power devices 212. The heights of the first power device 211 and the second power device 212 refer to their respective dimensions along the thickness direction of the inverter box 100 (e.g., ...). Figure 2 The dimension in the X direction.

[0055] This configuration concentrates the higher-power devices 21 in the first cavity 191 and the lower-power devices 21 in the second cavity 192, making full use of the cavity space. This allows the inverter box 100 to be flatter, smaller, and more compact internally, reducing the external space it occupies.

[0056] In some specific embodiments, such as Figure 2As shown, the first cavity 191 is located on the side of the circuit board 20 away from the main heat sink 31, and the second cavity 192 is located between the circuit board 20 and the main heat sink 31. That is, the circuit board 20 divides the inverter box 100 into inner and outer cavities. The outer cavity is the chamber on the side of the circuit board 20 facing the main heat sink 31, and the inner cavity is the chamber on the side of the circuit board 20 facing the inner sidewall 153 of the box body 10. The inner sidewall 153 is the sidewall of the box body 10 opposite the opening 11. Making the inner cavity thicker and concentrating the high-power devices 21 on the inner side helps to strengthen the protection of the high-power devices 21 with the help of the circuit board 20.

[0057] Understandably, during the assembly of the inverter box 100, the power devices 21 are first mounted onto the circuit board 20, then the circuit board 20 is inserted into the box body 10, and finally the heat sink 30 is mounted onto the box body 10. At this point, the higher power devices 21 are pre-sealed within the first cavity 191 by the installation of the circuit board 20, so the subsequent installation of the heat sink 30 will not affect the higher power devices 21. Conversely, the lower power devices 21 are at lower risk of being damaged during installation.

[0058] In some specific embodiments, the box body 10 has through holes on its walls for threading wires, and these through holes connect to the first cavity 191. That is, after the wire harness is threaded into the box body 10, the end of the wire harness is located within the thicker first cavity 191, and the wire harness is connected to the circuit board 20 or the power device 21 located within the first cavity 191. The thicker first cavity 191 provides more space at the connection point after the wire harness is connected to the circuit board 20 or the power device 21, reducing the risk of short circuits caused by contact with other components. Furthermore, in some embodiments, when connecting the wire harness, a tool is inserted through the through hole into the first cavity 191 for soldering operations, etc. The large space in the first cavity 191 facilitates tool operation and avoids damage to other parts.

[0059] In some embodiments, such as Figure 3 and Figure 4 As shown, the box wall of the box body 10 is provided with through holes for wires to pass through. The through holes include a first through hole 172 and a second through hole 173 located on different sides of the box body 10. The wire at the first through hole 172 is used for signal communication, and the wire at the second through hole 173 is used to connect to the compressor body 200. The second through hole 173 is lower than the first through hole 172.

[0060] It is understandable that the electricity connected to the compressor body 200 is high-voltage electricity, while the electricity used for signal communication is low-voltage electricity. Distributing the two on different sides of the housing 10 and increasing the distance between them can effectively isolate the high-voltage and low-voltage electricity, reduce signal interference from the high-voltage electricity to the low-voltage electricity, and improve the accuracy of signal transmission.

[0061] Since the wiring harness connecting the compressor body 200 is relatively heavy, the through hole here is set low to facilitate the wiring harness hanging down and dragging on the ground, thus reducing the tangling of the wiring harness.

[0062] In some embodiments, such as Figures 3-4 As shown, the first through hole 172 is located at the top of the housing 10, and the second through hole 173 is located on the side of the housing 10. This type of inverter box 100 typically does not need to be installed on the compressor body 200, as... Figure 5 and Figure 6 As shown, the inverter box 100 is spaced a certain distance from the compressor body 200. The through hole for signal transmission can be set at the top, and the through hole for connecting the compressor body 200 can be set on the side of the box 10. At this time, the second through hole 173 is low enough.

[0063] Specifically, such as Figure 1 As shown, the bottom of the box body 10 is provided with a connecting foot 82 and a plug 81. The connecting foot 82 is located on the side of the box body 10 with an opening 11, and the plug 81 is located below the second through hole 173.

[0064] Specifically, such as Figure 5 and Figure 6 As shown, the freezer 10000 has a compressor compartment V1, and the compressor body 200 of the freezer 10000 is located in the compressor compartment V1. The bottom plate of the compressor compartment V1 is the compartment bottom plate 710. The inverter box 100 and the compressor body 200 are both installed on the compartment bottom plate 710. The vibration generated by the compressor body 200 during operation will cause the compartment bottom plate 710 to vibrate, and also cause the inverter box 100 to vibrate. Therefore, the inverter box 100 needs to be installed securely.

[0065] In conventional installations, the inverter box is fixed by setting multiple connection holes on its bottom, with each hole connected to the chassis base plate via bolts. This not only involves a large number of bolts, but also typically requires bolts to be placed at all four corners of the inverter box, making installation relatively cumbersome and requiring repeated lifting of the chassis base plate, thus impacting installation efficiency.

[0066] In this application, by providing pins 81 and connecting pins 82 at the bottom of the inverter box 100, the inverter box 100 is supported in both directions and stably positioned on the chassis base plate 710. To install the inverter box 100 on the chassis base plate 710, first insert the pins 81 into the sockets on the chassis base plate 710, then align the holes on the connecting pins 82 with the holes on the chassis base plate 710, and finally install the bottom fasteners 781. This connection method eliminates the need to connect the bottom fasteners 781 to all four feet of the inverter box 100, and significantly reduces the number of bottom fasteners 781 required. Therefore, by reducing the number of bottom fasteners 781, the installation and fixing efficiency of the inverter box 100 can be improved.

[0067] In addition, the inverter box 100 was initially positioned by inserting pin 81 into the socket of the base plate 710. Then, the alignment of the pin 82 with the hole on the base plate 710 was made easier to find the alignment position.

[0068] Furthermore, such as Figure 3 As shown, a portion of the naval floor plate 710 is cut open and bent upward to form an upper baffle 721, and an insertion hole is formed between the upper baffle 721 and the naval floor plate 710.

[0069] With this configuration, when inserting pin 81 into the socket of the chassis base plate 710, it is only necessary to insert the inverter box 100 horizontally. Figure 3 The inverter box 100 is inserted from back to front. This reduces the bending stress on the pins 81 and allows the pins 81 to have sufficient length, making the bottom contact wire of the inverter box 100 long enough to improve stability.

[0070] Specifically, a portion of the naval floor plate 710 is cut and bent upwards to form an upper baffle 721. The upper baffle 721 has high structural strength and is not easily deformed under stress. Moreover, the upper baffle 721 is formed by cutting and bending a portion of the naval floor plate 710, eliminating the need for welding and saving costs.

[0071] In other embodiments, such as Figures 7-8 As shown, the second through hole 173 is located on the back of the housing 10 (i.e., on the inner sidewall 153), and the first through hole 172 is located on the top of the housing 10 (on the top sidewall 151). This inverter box 100 is configured to be installed on the compressor body 200. In this case, the two through holes 173 on the back face the compressor body 200 directly and are used for connecting the wiring of the compressor body 200. The first through hole 172 on the side can be set lower to easily bypass the compressor body 200 and facilitate the wiring for signal transmission.

[0072] In some specific embodiments, such as Figure 7 and Figure 8 As shown, the inner wall 153 of the box body 10, which is opposite to the opening 11, is provided with a boss box 60 protruding in a direction away from the opening 11, and the second through hole 173 is provided on the boss box 60. This allows the protruding boss box 60 to be conveniently used to bring the compressor body 200 closer together, making it easier to set up the connection structure.

[0073] Specifically, such as Figure 9 and Figure 10 As shown, the compressor body 200 is provided with a wiring terminal 201, and a mounting base 500 is installed on the compressor body 200. The mounting base 500 is provided with a clearance opening 501 facing the wiring terminal 201. The mounting base 500 includes a support plate 510 and a first hook 520 located above the support plate 510.

[0074] The boss box 60 is mounted on the support plate 510. The boss box 60 has a second through hole 173. The terminal block 201 is located in the second through hole 173 to connect to the inside of the box body 10. The first hook 520 is engaged with the boss box 60 through the second through hole 173. At this time, the mounting fastener 71 can be used to pass through the mounting base 500 and connect to the boss box 60.

[0075] By providing a support plate 510 and a first hook 520 on the mounting base 500, the boss box 60 can be directly placed on the support plate 510 during assembly. Since the boss box 60 has a second through hole 173 for inserting the terminal block 201, the first hook 520 can simultaneously hook onto the boss box 60 through the second through hole 173, thus positioning the inverter box 100 on the mounting base 500. Afterwards, the mounting fasteners 71 are installed to completely secure the inverter box 100. This design not only ensures the inverter box 100 is firmly installed on the compressor body 200 but also reduces the number of mounting fasteners 71 required, thereby reducing the labor intensity of installing the inverter box 100 and shortening the assembly time. Furthermore, the boss box 60 is not only supported by the support plate 510 but also hooked by the first hook 520, dispersing the connection stress at the boss box 60 and preventing deformation and disengagement after long-term connection.

[0076] Specifically, such as Figure 10 As shown, the boss box 60 forms a locking hole 602 and a first connecting hole 603 on both sides of the second through hole 173, respectively.

[0077] The mounting base 500 also includes: a second latch 550 (such as...) Figure 10 As shown in the figure, the second hook 550 and the side plate are located on the horizontal sides of the mounting base 500. The second hook 550 and the side plate restrict the boss box 60 between them, which plays a lateral limiting function.

[0078] The side plate is connected to the boss box 60 by a mounting fastener 71. The end of the second hook 550 is hooked onto the boss box 60, which not only restricts it laterally but also prevents rotation.

[0079] Specifically, such as Figure 10 As shown, the boss box 60 is provided with a locking hole 602, which is spaced apart from the second through hole 173 and located on the side of the second through hole 173 away from the side plate. The second hook 550 is engaged in the locking hole 602. This can reduce the stress on the boss box 60 at the edge of the second through hole 173 and avoid deformation caused by the second hook 550 pressing against the boss box 60 during vibration and impact. Moreover, the second hook 550 can hold the boss box 60, which is equivalent to an elastic arm, making assembly easier and providing a certain degree of elastic buffering function.

[0080] In some specific embodiments, such as Figure 9As shown, the portion of the boss box 60 located above the second through hole 173 forms a slanted hanging plate 66 that extends downward away from the opening 11. The boss box 60 can be hung on the mounting base 500 using the slanted hanging plate 66. For example, the mounting base 500 is provided with an upper folding plate 540, and the slanted hanging plate 66 is hung on the upper folding plate 540.

[0081] By setting the inclined side plate 66 to be inclined downward in the direction away from the opening 11, the inclined side plate 66 can guide the frequency converter box 100 towards the mounting base 500, so that the boss box 60 is closer to the mounting base 500, reducing the probability of the boss box 60 falling off the mounting base 500 after long-term operation.

[0082] Specifically, both the inclined side plate 66 and the upper folding plate 54 are inclined downwards in the direction towards the compressor body 200. The contact area between the inclined side plate 66 and the upper folding plate 540 is large. When the upper folding plate 540 supports the boss box 60, the contact stress on the upper folding plate 540 and the inclined side plate 66 is relatively low, which reduces the possibility of deformation and tearing of the upper folding plate 540 and the inclined side plate 66 after long-term operation.

[0083] Optionally, both the upper folding plate 540 and the inclined hanging plate 66 can be straight plates for easier processing. Of course, in some designs, both the upper folding plate 540 and the inclined hanging plate 66 can be curved plates to distribute stress more evenly.

[0084] In some specific embodiments, such as Figure 8 and Figure 2 As shown, the circuit board 20 is arranged parallel to the main heat sink 31. Multiple connecting protrusions 193 are provided on the inner wall of the housing 10, spaced apart along the edge of the opening 11. Each connecting protrusion 193 has a slot 194. The circuit board 20 abuts against the multiple connecting protrusions 193, with the edge of the circuit board 20 located at the slot 194. This effectively limits the circuit board 20 in the X and Z directions, reducing its wobbling and improving installation convenience.

[0085] The freezer 10000 according to a second aspect embodiment of the present invention includes the inverter box 100 of the above embodiment. This inverter box 100 has a simple structure and good heat dissipation performance, thereby improving the reliability of the freezer 10000 operation.

[0086] Other components of the inverter box 100 according to the present invention, such as circuit boards and electrical components, as well as its operation, are known to those skilled in the art and will not be described in detail here.

[0087] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A frequency conversion box, characterized in that, include: The box body is a flat box body that is vertically arranged, and the box body is open on the side with the largest surface area to form an opening; A circuit board, which is vertically disposed within the housing, with its largest surface facing the opening, and a power device disposed on at least one side of the circuit board; A heat sink, comprising a main heat sink plate mounted at the opening, the main heat sink plate being connected to the circuit board or the power device for heat conduction.

2. The frequency conversion box of claim 1, wherein, The circuit board divides the cavity of the housing into a first cavity and a second cavity, wherein the thickness of the first cavity is greater than the thickness of the second cavity; The power device includes a first power device disposed in the first cavity and a second power device disposed in the second cavity, wherein at least a portion of the first power device has a height greater than all the second power devices.

3. The frequency conversion box of claim 2, wherein, The first cavity is located on the side of the circuit board away from the main heat sink, and the second cavity is located between the circuit board and the main heat sink.

4. The frequency conversion box of claim 3, wherein, The box body has through holes on its walls for threading wires, and the through holes are connected to the first cavity.

5. The frequency conversion box of claim 1, wherein, The box body has through holes for threading wires. The through holes include a first through hole and a second through hole located on different sides of the box body. The wire at the first through hole is used for signal communication, and the wire at the second through hole is used to connect to the compressor body. The second through hole is lower than the first through hole.

6. The frequency conversion box of claim 5, wherein, The box wall opposite the opening of the box body protrudes in a direction away from the opening to form a boss box, and the second through hole is provided on the boss box; The boss box has a locking hole and a first connecting hole formed on both sides of the second through hole, respectively.

7. The frequency conversion box of claim 6, wherein, The portion of the boss box located above the second through hole forms a slanted hanging plate in the downward direction away from the opening.

8. The frequency conversion box of claim 5, wherein, The first through hole is located at the top of the box body, and the second through hole is located on the side of the box body; The bottom of the box is provided with connecting feet and plugs. The connecting feet are located on the side of the box with the opening, and the plugs are located below the second through hole.

9. The frequency conversion box of any one of claims 1-8, wherein, The circuit board is arranged parallel to the main heat sink. The inner wall of the box is provided with connecting protrusions. There are multiple connecting protrusions arranged at intervals along the edge of the opening. Each connecting protrusion is provided with a slot. The circuit board abuts against the multiple connecting protrusions, and the edge of the circuit board is located at the slot.

10. The frequency conversion box of any one of claims 1-8, wherein, The radiator also includes a secondary radiator connected to the main radiator, and the main radiator and the secondary radiator are located on different sides of the housing.

11. The frequency conversion box of claim 10, wherein, The secondary heat sink is one that makes the heat sink L-shaped, and the heat sink also includes heat dissipation fins provided on the main heat sink. Alternatively, there may be two secondary heat sinks arranged opposite each other, so that the heat sink is U-shaped.

12. A refrigerator characterized by Includes the frequency converter box according to any one of claims 1-11.

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