Circuit board and refrigeration equipment

Abstract

The utility model discloses a circuit board and refrigeration equipment. The circuit board comprises a control circuit board, the control circuit board is provided with a first installation part and a second installation part, at least part of a temperature adjustment trigger circuit and at least part of a rectification circuit are integrated on the first side of the first installation part, and at least part of a frequency adjustment circuit is integrated on the first side of the second installation part; the circuit board further comprises a main control circuit, and the main control circuit is arranged on the first installation part and / or the second installation part. In the thickness direction of the control circuit board, the occupied height of the first side space of the first installation part is larger than that of the first side space of the second installation part.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electrical appliances, and particularly relates to a circuit board and a refrigeration equipment. BACKGROUND

[0002] In the technical field of refrigeration, refrigeration equipment such as refrigerators, freezers and the like has become an indispensable part in people's daily life. These devices achieve precise control of the temperature in the space through an internal complex system to meet various needs such as food preservation, medicine storage, industrial cooling and the like.

[0003] The refrigeration equipment has a circuit board to control the operation of the refrigeration equipment. The circuit board is generally installed in an electric control box, and an opening is formed in the box body of the refrigeration equipment to install the electric control box. However, in the prior art, in order to enable the electric control box to be assembled in the box body, the opening area is large, which affects the appearance. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the utility model provides a circuit board and a refrigeration equipment, which aims to at least solve the technical problem that the opening area is large to enable the electric control box to be assembled in the box body, which affects the appearance.

[0005] The technical scheme of the utility model is as follows:

[0006] A circuit board, characterized in that it comprises: a control circuit board, the control circuit board has a first mounting portion and a second mounting portion, at least part of a temperature adjustment trigger circuit and at least part of a rectifier circuit are integrated on the first side of the first mounting portion, and at least part of a frequency adjustment circuit is integrated on the first side of the second mounting portion; the circuit board further comprises a master control circuit, and the master control circuit is arranged on the first mounting portion and / or the second mounting portion; wherein, along the thickness direction of the control circuit board, the space occupation height of the first side of the first mounting portion is greater than that of the first side of the second mounting portion.

[0007] In some embodiments, the first mounting portion and the second mounting portion are located at two ends of the control circuit board.

[0008] In some embodiments, the first side of the first mounting portion and the first side of the second mounting portion are located on the same side of the control circuit board.

[0009] In some embodiments, the circuit board further comprises an operating member for triggering the temperature adjustment trigger portion.

[0010] In some embodiments, the rectifier circuit includes: a common-mode inductor disposed on a first side of the first mounting portion; a rectifier bridge disposed on a first side of the first mounting portion and electrically connected to the common-mode inductor; and an electrolytic capacitor disposed on a first side of the first mounting portion and electrically connected to the frequency adjustment circuit and the main control circuit.

[0011] In some implementations, the main control circuit includes: a voltage conversion circuit disposed on the second side of the first mounting portion and electrically connected to the rectifier circuit; and a control circuit disposed on the first side of the first mounting portion and electrically connected to the voltage conversion circuit, the frequency adjustment circuit, and the temperature adjustment trigger circuit; wherein the first side of the first mounting portion is disposed opposite to the second side of the first mounting portion.

[0012] In some implementations, the frequency adjustment circuit includes a multi-channel single-phase inverter circuit.

[0013] In some embodiments, the single-phase inverter circuit includes: a drive protection circuit disposed on the second side of the second mounting portion and electrically connected to the main control circuit; an insulated gate bipolar transistor disposed on the first side of the second mounting portion and electrically connected to the rectifier circuit and the drive protection circuit; wherein the first side of the second mounting portion is disposed opposite to the second side of the second mounting portion.

[0014] In some embodiments, the circuit board further includes a safety circuit integrated into the first mounting portion and electrically connected to the rectifier circuit.

[0015] Based on the same inventive concept, this utility model also provides a refrigeration device, including a housing and an electrical control box. The electrical control box contains the circuit board. The housing has a receiving cavity and an opening communicating with the receiving cavity. The electrical control box passes through the opening and is installed in the receiving cavity.

[0016] The beneficial effects of this utility model include at least the following:

[0017] Because the control circuit board has a first mounting part and a second mounting part, the first side of the first mounting part integrates at least a portion of the temperature adjustment trigger circuit and at least a portion of the rectification circuit, and the first side of the second mounting part integrates at least a portion of the frequency adjustment circuit. The circuit board also includes a main control circuit, which is located in the first mounting part and / or the second mounting part. Therefore, the control circuit board integrates the triggering function, rectification function, control function and frequency adjustment function into one, realizing the merging of functional units, thereby reducing the number of independent parts. The integrated design eliminates the intermediate connecting parts (such as wire harnesses, connectors, etc.) originally used to connect various components, reducing assembly difficulty, reducing the types and quantities of parts, reducing costs, and also reducing connection steps and the number of interfaces, simplifying the assembly process, improving production efficiency, and shortening the production cycle. Moreover, it can reduce assembly errors caused by improper connection between multiple parts, allowing the control circuit board to be installed as a whole, reducing the cumulative errors caused by assembling parts one by one, and improving the overall assembly accuracy. At the same time, the integrated design makes the control circuit board more compact in spatial layout, reducing the space occupied by multiple parts scattered.

[0018] The rectifier circuit rectifies the 220V AC power from the external power supply into 310V DC power, and supplies the 310V DC power to the main control circuit and the frequency adjustment circuit respectively. The main control circuit outputs 5V DC power to the temperature adjustment trigger circuit to realize the power-on of various circuits on the control board.

[0019] When the temperature of the refrigeration equipment needs to be adjusted, the temperature adjustment trigger circuit triggers the main control circuit to input an adjustment signal to the main control circuit. The main control circuit sends a control signal to the frequency adjustment circuit according to the adjustment signal. The frequency adjustment circuit is electrically connected to the compressor. The frequency adjustment circuit sends a frequency adjustment signal to the compressor according to the control signal to control the operation of the compressor.

[0020] Since the height occupied by the first side of the first mounting part is greater than that of the first side of the second mounting part along the thickness direction of the control circuit board, when designing the control box to accommodate the control circuit board, the control box can be designed according to the height occupied by the first side of the first mounting part and the first side of the second mounting part. The control box has a receiving area opposite to the first side of the first mounting part and the first side of the second mounting part. The outline of the receiving area needs to be adapted to the height occupied by the first side of the first mounting part and the first side of the second mounting part. That is to say, the part of the outline of the receiving area opposite to the first side of the second mounting part will be recessed to reduce the space occupied by the control box and achieve miniaturization.

[0021] When installing the control box into the refrigeration equipment's housing, the control box is inserted into the housing's receiving cavity through an opening in the housing. At this point, the portion of the receiving area's outline opposite the first side of the second mounting part enters the receiving cavity through the opening, while the portion of the receiving area's outline opposite the first side of the first mounting part can close the opening. This reduces the opening's area; that is, along the control box's installation direction, the projected area of ​​the opening on the housing is smaller than the overall projected area of ​​the control box on the housing. Understandably, while ensuring the control box can be smoothly installed into the receiving cavity, the opening can be made smaller and more concealed, improving the overall aesthetics of the refrigeration equipment's housing and making it look cleaner and more upscale.

[0022] The portion of the receiving area opposite to the first side of the second mounting section is recessed to form a clearance notch, which provides additional space for the installation of the electrical control box. When the electrical control box is placed into the enclosure, it can be directly inserted diagonally into the opening, avoiding obstructions from the edge of the opening or other surrounding structures of the enclosure through the clearance notch, making the installation process smoother and reducing installation difficulties caused by size mismatch or insufficient space, thus ensuring smooth installation of the electrical control box. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 These are schematic diagrams of the electrical control box in some embodiments;

[0025] Figure 2 for Figure 1 Exploded view of the central electrical control box;

[0026] Figure 3 for Figure 2 Cross-sectional view of the central electrical control box;

[0027] Figure 4 for Figure 2 A schematic diagram of the control circuit board.

[0028] Figure 5 for Figure 4 Front view of the central control circuit board;

[0029] Figure 6 for Figure 4 Rear view of the central control circuit board;

[0030] Figure 7These are schematic diagrams of the structure of a refrigeration device according to some embodiments;

[0031] Figure 8 for Figure 7 Schematic diagram of the structure of the refrigeration equipment after removing the electrical control box;

[0032] Figure 9 for Figure 7 A schematic diagram of the structure after removing the side panel of the refrigeration equipment.

[0033] In the attached image:

[0034] 10 electrical control boxes;

[0035] The circuit board includes a control circuit board 20, a first mounting part 21, a second mounting part 22, a temperature adjustment trigger circuit 23, a rectifier circuit 24, a common mode inductor 241, a rectifier bridge 242, an electrolytic capacitor 243, a main control circuit 25, a voltage conversion circuit 251, a control circuit 252, a frequency adjustment circuit 26, a single-phase inverter circuit 261, a drive protection circuit 2611, and an insulated gate bipolar transistor 2612.

[0036] Operating component 30;

[0037] Safety circuit 40;

[0038] Box body 50, receiving cavity 51, opening 52. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0043] This application is described below with reference to the accompanying drawings and specific embodiments:

[0044] The circuit board and cooling device provided in this embodiment aim to solve, to some extent, the technical problem that the large opening area affects the aesthetics in order to assemble the electrical control box into the housing.

[0045] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 The circuit board in this embodiment includes a control circuit board 20. The control circuit board 20 has a first mounting portion 21 and a second mounting portion 22. At least a portion of a temperature adjustment trigger circuit 23 and at least a portion of a rectifier circuit 24 are integrated on the first side of the first mounting portion 21, and at least a portion of a frequency adjustment circuit 26 is integrated on the first side of the second mounting portion 22. The circuit board also includes a main control circuit 25, which is disposed in the first mounting portion 21 and / or the second mounting portion 22. Along the thickness direction of the control circuit board 20, the height occupied by the first side of the first mounting portion 21 is greater than the height occupied by the first side of the second mounting portion 22.

[0046] The main control circuit 25 can not only control the temperature of the refrigeration equipment, but also control the operation of the fan and the defrosting of the refrigeration equipment.

[0047] The temperature adjustment trigger circuit 23 can be a sliding rheostat.

[0048] The main control circuit 25 can be entirely located in the first mounting part 21 or entirely located in the second mounting part 22. The main control circuit 25 can be partially located in the first mounting part 21 and partially located in the second mounting part 22.

[0049] Since the control circuit board 20 has a first mounting part 21 and a second mounting part 22, the first mounting part 21 integrates at least a portion of the temperature adjustment trigger circuit 23, at least a portion of the rectifier circuit 24 and at least a portion of the main control circuit 25 on its first side, and the second mounting part 22 integrates at least a portion of the frequency adjustment circuit 26 on its first side, the control circuit board 20 integrates the triggering function, rectification function, control function and frequency adjustment function into one unit, realizing the merging of functional units, thereby reducing the number of independent parts. The integrated design eliminates the intermediate connecting parts (such as wire harnesses, connectors, etc.) originally used to connect various components, reducing assembly difficulty, reducing the types and quantities of parts, reducing costs, and also reducing connection steps and the number of interfaces, simplifying the assembly process, improving production efficiency, and shortening the production cycle. Moreover, it can reduce assembly errors caused by improper connection between multiple parts, allowing the control circuit board 20 to be installed as a whole, reducing the cumulative errors caused by assembling parts one by one, and improving the overall assembly accuracy. At the same time, the integrated design makes the control circuit board 20 more compact in spatial layout, reducing the space occupied by multiple parts scattered.

[0050] The rectifier circuit 24 rectifies the 220V AC power from the external power supply into 310V DC power, and supplies the 310V DC power to the main control circuit 25 and the frequency adjustment circuit 26 respectively. The main control circuit 25 outputs 5V DC power to the temperature adjustment trigger circuit 23 to realize the power-on of each circuit on the control circuit board 20.

[0051] When the temperature of the refrigeration equipment needs to be adjusted, the temperature adjustment trigger circuit 23 triggers the main control circuit 25 to input an adjustment signal to the main control circuit 25. The main control circuit 25 sends a control signal to the frequency adjustment circuit 26 according to the adjustment signal. The frequency adjustment circuit 26 is electrically connected to the compressor. The frequency adjustment circuit 26 sends a frequency adjustment signal to the compressor according to the control signal to control the operation of the compressor.

[0052] Combination Figure 1 , Figure 2 and Figure 4Since the height occupied by the first side of the first mounting portion 21 is greater than that occupied by the first side of the second mounting portion 22 along the thickness direction of the control circuit board 20, when designing the electrical control box 10 to accommodate the control circuit board 20, the electrical control box 10 can be designed according to the height occupied by the first side of the first mounting portion 21 and the first side of the second mounting portion 22. The electrical control box 10 has a receiving area opposite to the first side of the first mounting portion 21 and the first side of the second mounting portion 22. The outline of the receiving area needs to be adapted to the height occupied by the first side of the first mounting portion 21 and the first side of the second mounting portion 22. That is to say, the part of the outline of the receiving area opposite to the first side of the second mounting portion 22 will be recessed to reduce the space occupied by the electrical control box 10 and achieve miniaturization.

[0053] Because the electronic components of the rectifier circuit 24 are large in size and occupy a large space height, when the rectifier circuit 24 is arranged in the control box 10, the outline space occupied by the rectifier circuit 24 in the control box is large. Therefore, at least part of the rectifier circuit 24 is arranged on the first side of the first mounting part 21.

[0054] Since the outline of the receiving area needs to protrude from the area opposite to the first side of the first mounting part 21, at least part of the temperature adjustment trigger circuit 23 is provided on the first side of the first mounting part 21. That is, the temperature adjustment trigger circuit 23 is located at a position where the outline of the receiving area of ​​the control box 10 is larger. When the operating member 30 triggers the temperature adjustment circuit 23, the operating member 30 can be exposed in the control box 10 for easy operation by the user.

[0055] Combination Figure 1 , Figure 7 , Figure 8 and Figure 9 When the control box 10 is to be installed inside the housing 50 of the refrigeration equipment, the control box 10 is inserted into the receiving cavity 51 of the housing 50 through the opening 52 on the housing 50. At this time, the portion of the receiving area whose outline is opposite to the first side of the second mounting part 22 enters the receiving cavity 51 through the opening 52. The portion of the receiving area whose outline is opposite to the first side of the first mounting part 21 can close the opening 52, thereby reducing the area of ​​the opening 52. That is, along the installation direction of the control box 10, the projected area of ​​the opening 52 on the housing 50 is smaller than the projected area of ​​the entire control box 10 on the housing 50. It can be understood that, under the premise of ensuring that the control box 10 can be smoothly installed into the receiving cavity 51, the opening 52 can be made smaller and more concealed, improving the overall appearance of the housing 50 of the refrigeration equipment and making the housing 50 look cleaner and more high-end.

[0056] Combination Figure 1 , Figure 7 , Figure 8 and Figure 9The portion of the accommodating area that is opposite to the first side of the second mounting portion 22 is recessed to form a clearance notch. The existence of the clearance notch provides additional space for the installation of the electrical control box 10. When the electrical control box 10 is placed into the housing 50, it can be directly inserted obliquely into the opening 52. By avoiding the edge of the opening 52 or other obstructions from the surrounding structure of the housing 50 through the clearance notch, the installation process is smoother, reducing installation difficulties caused by size mismatch or insufficient space, thus ensuring smooth installation of the electrical control box 10.

[0057] In some embodiments, in order to control the compressor of the refrigeration equipment, the frequency adjustment circuit 26 includes at least one of a variable frequency adjustment circuit and a fixed frequency adjustment circuit.

[0058] When the frequency adjustment circuit 26 is a variable frequency adjustment circuit, the variable frequency adjustment circuit can dynamically change the frequency of the signal as needed. By adjusting the power supply frequency of the compressor, more precise control and higher operating efficiency can be achieved.

[0059] When the frequency adjustment circuit 26 is a fixed frequency adjustment circuit, the fixed frequency adjustment circuit can keep the frequency of the signal stable and the working state is relatively fixed. Therefore, its reliability is usually high, ensuring the stability and reliability of the compressor during long-term operation.

[0060] Combination Figure 4 In some embodiments, in order to ensure the normal operation of the control circuit board 20, the first mounting part 21 and the second mounting part 22 are located at both ends of the control circuit board 20 to reduce electromagnetic interference between the temperature adjustment trigger circuit 23, the rectifier circuit 24 and the main control circuit 25 and the frequency adjustment circuit 26.

[0061] Of course, in some other embodiments, the first mounting portion 21 and the second mounting portion 22 may be located in the non-end regions of the electronic control board 20, such as the middle of the circuit board 20.

[0062] In some embodiments, in order to place the receiving areas of the control box 10, the first side of the first mounting portion 21 and the first side of the second mounting portion 22 opposite to each other on the control box 10, the first side of the first mounting portion 21 and the first side of the second mounting portion 22 are located on the same side of the control circuit board 20, so as to facilitate the formation of the outline of the receiving area.

[0063] Combination Figure 1 and Figure 2 In some embodiments, in order to enable the temperature adjustment trigger circuit 23 to trigger the main control circuit 25, the circuit board also includes an operating element 30 for triggering the temperature adjustment trigger circuit 23.

[0064] The operating component 30 can be a knob. The knob part is located outside the control box 10, and the other part passes through the control box 10 and is connected to the temperature adjustment trigger circuit 23. When the temperature needs to be adjusted, the user can directly operate the knob outside the control box 10 so that the knob can drive the temperature adjustment trigger circuit 23 to operate. In other words, the user can directly operate the temperature adjustment trigger circuit 23 through the knob without opening the control box 10, thereby adjusting the temperature. This simplifies the operation steps, improves the user experience, and reduces the risk of the user directly contacting electrical components, thus improving safety.

[0065] The operating component 30 can be a temperature control adjustment button. Pressing the temperature control adjustment button will activate the temperature adjustment trigger 23 to input an adjustment signal to the main control circuit 25.

[0066] The operating element 30 can be a touch-sensitive operating element. Pressing the touch-sensitive operating element actuates the temperature adjustment trigger 23 to input an adjustment signal to the main control circuit 25.

[0067] Combination Figure 4 and Figure 5 In some embodiments, to achieve rectification, the rectifier circuit 24 includes a common-mode inductor 241, a rectifier bridge 242, and an electrolytic capacitor 243. The common-mode inductor 241 is disposed on the first side of the first mounting portion 21. The rectifier bridge 242 is disposed on the first side of the first mounting portion 21 and is electrically connected to the common-mode inductor 241. The electrolytic capacitor 243 is disposed on the first side of the first mounting portion 21 and is electrically connected to the frequency adjustment circuit 26 and the main control circuit 25.

[0068] An external power supply delivers 220V AC to the common-mode inductor 241. The common-mode inductor 241 suppresses common-mode interference signals in the circuit to ensure the stability and reliability of the circuit system. The filtered 220V AC from the common-mode inductor 241 is then delivered to the rectifier bridge 242. The rectifier bridge 242 rectifies the 220V AC into 310V DC and delivers the 310V DC to the electrolytic capacitor 243 for voltage regulation. The electrolytic capacitor 243 then delivers the regulated 310V DC to the frequency adjustment circuit 26 and the main control circuit 25.

[0069] Combination Figure 4 , Figure 5 and Figure 6In some embodiments, to achieve control, the main control circuit 25 includes a voltage conversion circuit 251 and a control circuit 252. The voltage conversion circuit 251 is located on the second side of the first mounting portion 21 and is electrically connected to the rectifier circuit 24. The control circuit 252 is located on the first side of the first mounting portion 21 and is electrically connected to the voltage conversion circuit 251, the frequency adjustment circuit 26, and the temperature adjustment trigger circuit 23. The control circuit 252 can be an MCU (Micro Control Unit).

[0070] The rectifier circuit 24 delivers 310V DC power to the voltage conversion circuit 251, which steps down the 310V DC power to 15V DC power and then delivers the 15V DC power to the control circuit 252.

[0071] In some embodiments, in order to ensure the stability of the operation of the control circuit 252, the first side of the first mounting part 21 and the second side of the first mounting part 21 are arranged opposite to each other. That is, the control circuit 252 and the voltage conversion circuit 251 are arranged opposite to each other to reduce the distance between the control circuit 252 and the voltage conversion circuit 251, reduce the trace length, reduce the voltage drop, and enable the voltage output by the voltage conversion circuit 251 to be transmitted to the control circuit 252 more accurately. At the same time, the space of the control circuit board 20 can be fully utilized, realizing the compact design of the control circuit board 20, reducing the overall size, and improving the space utilization rate.

[0072] In some embodiments, the control circuit 252 has a built-in LDO (Low Drop Out) module, which reduces the 15V DC power of the control circuit 252 to 5V DC power and sends the 5V DC power to the temperature adjustment trigger circuit 23.

[0073] In some embodiments, the frequency adjustment circuit 26 includes a multi-channel single-phase inverter circuit 261, which can efficiently convert direct current into alternating current to control the operation of the compressor of the refrigeration equipment.

[0074] Combination Figure 4 , Figure 5 and Figure 6 In some embodiments, to enable the operation of the compressor in the refrigeration equipment, the single-phase inverter circuit 261 includes a drive protection circuit 2611 and an insulated-gate bipolar transistor 2612. The drive protection circuit 2611 is located on the second side of the second mounting portion 22 and is electrically connected to the main control circuit 25. The insulated-gate bipolar transistor 2612 is located on the first side of the second mounting portion 22 and is electrically connected to the rectifier circuit 24 and the drive protection circuit 2611.

[0075] The rectifier circuit 24 supplies 310V DC power to the insulated gate bipolar transistor 2612, and the main control circuit 25 supplies 15V DC power to the drive protection circuit 2611. The drive protection circuit 2611 controls the switching of the 310V DC power between the rectifier circuit 24 and the insulated gate bipolar transistor 2612 according to the 15V DC power, so that the insulated gate bipolar transistor 2612 controls the operation of the compressor.

[0076] Combination Figure 4 , Figure 5 and Figure 6 In some embodiments, to ensure the stability of the single-phase inverter circuit 261, the first side of the second mounting portion 22 is arranged opposite to the second side of the second mounting portion 22. That is, the drive protection circuit 2611 and the insulated gate bipolar transistor 2612 are arranged opposite to each other to reduce the spacing between the drive protection circuit 2611 and the insulated gate bipolar transistor 2612, reduce the trace length, reduce the voltage drop, and enable the voltage output by the drive protection circuit 2611 to be transmitted to the insulated gate bipolar transistor 2612 more accurately. At the same time, the space of the control circuit board 20 can be fully utilized, realizing the compact design of the control circuit board 20, reducing the overall size, and improving the space utilization rate.

[0077] In some embodiments, to ensure the normal operation of the control circuit board 20, the circuit board further includes a safety circuit 40. The safety circuit 40 is integrated into the first mounting portion 21 and is electrically connected to the rectifier circuit 24. An external power supply delivers 220V AC power to the safety circuit 40, and the safety circuit 40 delivers 220V AC power to the rectifier circuit 24.

[0078] The safety circuit 40 includes a residual current device (RCD) that can monitor leakage current in the circuit in real time. Once leakage current is detected, the RCD will quickly cut off the circuit to prevent current from leaking to the human body or other equipment, thereby avoiding safety accidents such as electric shock or short circuit.

[0079] The safety circuit 40 also features overload protection. When the current in the circuit exceeds the rated value, the overload protector will be triggered, cutting off the circuit to prevent electrical equipment from being damaged by overload or causing dangerous situations such as fire.

[0080] When a short circuit occurs in the circuit, the short-circuit protector in the safety circuit 40 will immediately disconnect the circuit to prevent the short-circuit current from damaging the circuit and equipment, and to ensure the stability and safety of the circuit.

[0081] Based on the same inventive concept, this application also proposes a refrigeration device that uses the aforementioned circuit board. The specific structure of the circuit board is as described in the above embodiments. Since the circuit board uses all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0082] Combination Figure 1 and Figure 2 In some embodiments, the refrigeration equipment includes a housing 50 and an electrical control box 10. The electrical control box 10 houses the circuit board, preventing it from being exposed to the outside, thus ensuring the safety of the circuit board and also maintaining its aesthetic appeal.

[0083] Combination Figure 7 , Figure 8 and Figure 9 In some embodiments, the housing 50 has a receiving cavity 51 and an opening 52 communicating with the receiving cavity 51. The electrical control box 10 is installed in the receiving cavity 51 through the opening 52. The electrical control box 10 can be inserted into the receiving cavity 51 at an angle through the opening 52, so that the electrical control box 10 can smoothly enter the receiving cavity 51, ensuring the convenience of installation and realizing the installation of the electrical control box 10.

[0084] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0085] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0086] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0088] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0089] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A circuit board, characterized in that, include: A control circuit board having a first mounting portion and a second mounting portion, wherein at least a portion of a temperature adjustment trigger circuit and at least a portion of a rectifier circuit are integrated on a first side of the first mounting portion, and at least a portion of a frequency adjustment circuit is integrated on a first side of the second mounting portion. The circuit board also includes a main control circuit, which is disposed in the first mounting part and / or the second mounting part; Wherein, along the thickness direction of the control circuit board, the first side space occupied by the first mounting part is greater than the first side space occupied by the second mounting part.

2. The circuit board according to claim 1, characterized in that, The first mounting portion and the second mounting portion are located at both ends of the control circuit board.

3. The circuit board according to claim 1, characterized in that, The first side of the first mounting part and the first side of the second mounting part are located on the same side of the control circuit board.

4. The circuit board according to any one of claims 1-3, characterized in that, The circuit board also includes an operating element for triggering the temperature adjustment trigger circuit.

5. The circuit board according to any one of claims 1-3, characterized in that, The rectifier circuit includes: A common-mode inductor is disposed on the first side of the first mounting portion; A rectifier bridge is disposed on the first side of the first mounting part and is electrically connected to the common mode inductor; An electrolytic capacitor is disposed on the first side of the first mounting portion and is electrically connected to the frequency adjustment circuit and the main control circuit.

6. The circuit board according to any one of claims 1-3, characterized in that, The main control circuit includes: A voltage conversion circuit is disposed on the second side of the first mounting portion and is electrically connected to the rectifier circuit; The control circuit is located on the first side of the first mounting portion and is electrically connected to the voltage conversion circuit, the frequency adjustment circuit and the temperature adjustment trigger circuit. The first side of the first mounting part is disposed opposite to the second side of the first mounting part.

7. The circuit board according to any one of claims 1-3, characterized in that, The frequency adjustment circuit includes multiple single-phase inverter circuits.

8. The circuit board according to claim 7, characterized in that, The single-phase inverter circuit includes: A drive protection circuit is located on the second side of the second mounting part and is electrically connected to the main control circuit. An insulated gate bipolar transistor is disposed on the first side of the second mounting portion and is electrically connected to the rectifier circuit and the drive protection circuit. The first side of the second mounting part is disposed opposite to the second side of the second mounting part.

9. The circuit board according to any one of claims 1-3, characterized in that, The circuit board also includes: The safety circuit is integrated into the first mounting part and is electrically connected to the rectifier circuit.

10. A refrigeration device, characterized in that, The device includes a housing and an electrical control box. The electrical control box contains a circuit board as described in any one of claims 1-9. The housing has a receiving cavity and an opening communicating with the receiving cavity. The electrical control box passes through the opening and is installed in the receiving cavity.

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