Variable-frequency electric appliance box and window type air conditioner

Abstract

The utility model discloses a frequency conversion electric appliance box and a window type air conditioner. The frequency conversion electric appliance box comprises a box body, components are arranged in the box body, the box body is connected with an air inlet pipe and an air outlet pipe, and the air inlet pipe, the box body and the air outlet pipe are communicated with one another so as to be communicated with the external environment; air enters the box body along the air inlet pipe, so that the air in the box body flows until the air flows out along the air outlet pipe; the air inlet pipe and the air outlet pipe are each provided with an opening, and the openings face downwards. By designing the air inlet pipe and the air outlet pipe and ensuring that the air inlet pipe and the air outlet pipe are communicated with the interior of the box body, an air circulation path is formed, external air can enter the electrical box along the air inlet pipe, exchanges heat with internal components, absorbs heat generated by the components, and then is discharged to the external environment through the air outlet pipe. The internal temperature of the electric appliance box is effectively reduced, and the risks of performance reduction, damage and even failure possibly caused by overheating of components are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioners, in particular to a frequency conversion electrical box and a window air conditioner. Background Art

[0002] At present, variable frequency window air conditioners are becoming more and more popular among consumers due to the advantages of variable frequency technology in energy saving and comfort, as well as the advantages of window air conditioners such as easy installation, good airtightness and low air leakage. It has become a general trend for variable frequency window air conditioners to replace the original fixed frequency window air conditioners, especially in the Middle East, where the demand for variable frequency window air conditioners is increasing. However, the temperature rise of the components in the electrical box of the variable frequency window air conditioner and the operating frequency of the whole machine have always been a dilemma. The higher the operating frequency of the whole machine, the better the cooling effect, but the temperature rise of the components is also large, which will affect the service life of the components and cause safety hazards; if the operating frequency of the whole machine is low, the temperature rise of the components will be reduced, and the safety will be improved, but the cooling effect will be worse, reducing the user's cooling comfort experience.

[0003] The fundamental reason for the temperature rise of the components of the variable frequency window air conditioner is that the electrical box of the existing window variable frequency air conditioner is mostly placed in the outdoor wind duct due to structural limitations, and the electrical box radiator is used for heat dissipation through air cooling. However, in order to meet the requirements of the rain test and prevent the internal components and the mainboard of the electrical box from being exposed to rain, which would cause safety hazards, the variable frequency electrical box is usually a closed structure, and all components are sealed inside the electrical box. After the internal components heat up, the internal air does not circulate, and the internal temperature continues to rise. The radiator can only reduce the temperature rise of the power components associated with the radiator, but cannot effectively reduce the internal ambient temperature of the electrical box and the temperature rise of heating components such as inductors and electrolytic capacitors. At the same time, in order to meet the test requirements of the experiment, the radiator needs to be away from the air inlet grille, resulting in poor heat dissipation. Therefore, a variable frequency electrical box is needed to improve the above problems. Utility Model Content

[0004] The utility model aims to overcome the deficiencies of the prior art and provide a frequency conversion electrical box and a window air conditioner.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] In the first aspect, an embodiment of the utility model provides a variable frequency electrical box, comprising: a box body, wherein components are arranged inside the box body, the box body is connected to an air inlet pipe and an air outlet pipe, the air inlet pipe, the box body and the air outlet pipe are interconnected to connect to the external environment; air enters the box body along the air inlet pipe to make the air inside the box body flow until it flows out along the air outlet pipe; the air inlet pipe and the air outlet pipe are both provided with openings, and the openings are arranged downward.

[0007] In a specific embodiment, a filter screen is also provided at the opening.

[0008] In a specific embodiment, the air inlet pipe and the air outlet pipe have the same structure.

[0009] In a specific embodiment, a sealing member is provided at the connection between the air inlet pipe and the box body.

[0010] In a specific embodiment, the sealing member is sealing putty or tin foil.

[0011] In a specific embodiment, the air inlet pipe is welded, clamped or sleeved on the box body.

[0012] In a specific embodiment, the air inlet pipe is in an inverted L shape.

[0013] In a specific embodiment, the cross section of the air inlet pipe is square.

[0014] In a specific embodiment, a heat sink is further provided on the surface of the box body.

[0015] The variable frequency electrical box of the utility model has the following beneficial effects compared with the prior art: by designing the air inlet duct and the air outlet duct and ensuring that they are connected with the inside of the box body, an air circulation path is formed, so that external air can enter the interior of the electrical box along the air inlet duct and exchange heat with the internal components, absorb the heat generated by the components, and then discharge it to the external environment through the air outlet duct. This process effectively reduces the temperature inside the electrical box and reduces the risk of performance degradation, damage or even failure of the components due to overheating; in addition, the opening is set downward, which can effectively prevent rainwater from directly entering the interior of the electrical box from the opening.

[0016] In a second aspect, an embodiment of the utility model provides a window air conditioner, comprising the variable frequency electrical box as described above.

[0017] The window air conditioner of the present invention has the following beneficial effects compared with the prior art: by designing the air inlet duct and the air outlet duct and ensuring that they are connected to the inside of the box body, an air circulation path is formed, so that external air can enter the interior of the electrical box along the air inlet duct, exchange heat with the internal components, absorb the heat generated by the components, and then be discharged to the external environment through the air outlet duct. This process effectively reduces the temperature inside the electrical box, reduces the risk of performance degradation, damage or even failure of the components due to overheating, and improves the operating safety and reliability of the air conditioner; in addition, the opening is set downward, which can effectively prevent rainwater from directly entering the interior of the electrical box from the opening.

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 The structure diagram of the frequency conversion electrical box provided by the utility model Figure 1 ;

[0021] Figure 2 The structure diagram of the frequency conversion electrical box provided by the utility model Figure 2 ;

[0022] Figure 3 A schematic diagram of the structure of a frequency conversion electrical box provided by the utility model equipped with a filter;

[0023] Figure 4 A schematic diagram of an application scenario of the frequency conversion electrical box provided by the utility model;

[0024] Figure 5 This is a schematic diagram of the air circulation scenario when the frequency conversion electrical appliance box provided by the utility model is used.

[0025] Reference numerals:

[0026] The box body 10 , the air inlet pipe 20 , the opening 21 , the air outlet pipe 30 , and the filter screen 40 . DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0034] See also Figures 1 to 5 In the specific embodiment shown, the utility model discloses a variable frequency electrical appliance box, comprising: a box body 10, wherein components are arranged inside the box body 10, the box body 10 is connected with an air inlet pipe 20 and an air outlet pipe 30, and the air inlet pipe 20, the box body 10 and the air outlet pipe 30 are interconnected to connect to the external environment; air enters the box body 10 along the air inlet pipe 20, so that the air inside the box body 10 flows until it flows out along the air outlet pipe 30.

[0035] Specifically, by designing the air inlet 20 and the air outlet 30, and ensuring that they are connected to the inside of the box body 10, an air circulation path is formed, so that the external air can enter the inside of the electrical box along the air inlet 20, and exchange heat with the internal components, absorb the heat generated by the components, and then discharge it to the external environment through the air outlet 30. This process effectively reduces the temperature inside the electrical box and reduces the risk of performance degradation, damage or even failure of the components due to overheating. In addition, the components in the variable frequency electrical box, especially the power devices, will generate a lot of heat when working. If this heat cannot be dissipated in time, the temperature of the components will rise rapidly, exceeding the designed operating temperature range, resulting in performance degradation, shortened life or even direct damage. Therefore, this heat dissipation system is crucial for protecting components and maintaining their long-term stable operation. In addition, by reducing the ambient temperature inside the electrical box, the failure rate of components caused by high temperature is reduced, thereby improving the reliability and stability of the entire system, which is particularly important for variable frequency electrical equipment that needs to run for a long time and at a high load. In addition, when components operate at lower temperatures, the thermal stress of their internal materials will be reduced and the chemical reaction rate will also be lowered, which will help delay the aging process of the components and thus extend their service life.

[0036] Preferably, the air inlet duct 20 and the air outlet duct 30 are located on both sides of the box body 10. In other embodiments, the air inlet duct 20 and the air outlet duct 30 may also be located on the same side of the box body 10.

[0037] Specifically, the components adopt existing public technologies, which will not be elaborated in detail here.

[0038] In one embodiment, both the air inlet pipe 20 and the air outlet pipe 30 are provided with openings 21, and the openings 21 are arranged downward.

[0039] Specifically, see Figure 2 As shown, by setting the openings 21 of the air inlet pipe 20 and the air outlet pipe 30 downward, rainwater can be effectively prevented from directly entering the interior of the electrical box from the opening 21. Rainwater will flow down along the edge of the opening 21 under the action of gravity, rather than infiltrating into the electrical box, thereby avoiding direct erosion and potential damage to components by rainwater. In addition, components are the most critical part of the electrical box. They are very sensitive to humidity and moisture. Once the components are damp, they may cause short circuits, corrosion, performance degradation, or even complete failure. Therefore, by taking such waterproof measures, it is possible to ensure that the components work in a dry environment and avoid various problems caused by moisture. In addition, the improvement of waterproof performance means that the electrical box can maintain normal operation under severe weather conditions, and will not fail or degrade due to external factors such as rainwater, which greatly improves the reliability and stability of the entire system and ensures the long-term stable operation of the equipment. In addition, since the components are effectively protected from water, the probability of them being affected by a humid environment is greatly reduced, thereby slowing down the aging process of the components and extending their service life. In addition, electrical boxes with good waterproof performance can reduce failures and damage caused by external factors such as rain, thereby reducing equipment maintenance costs and downtime, which is especially important for industrial equipment that requires continuous operation and efficient maintenance.

[0040] In one embodiment, a filter screen 40 is further disposed at the opening 21 .

[0041] Specifically, see Figure 3As shown, a filter 40 is provided at the opening 21 of the air inlet pipe 20 and the air outlet pipe 30, which can effectively prevent small organisms such as insects from entering the interior of the electrical box. These insects may carry dirt, bacteria or other harmful substances. Once they enter the interior of the electrical box, they may pollute or damage the components, or even cause faults such as short circuits. The provision of the filter 40 effectively prevents this risk. In addition, in addition to preventing insects, the filter 40 can also block the entry of tiny particles such as dust and fibers to a certain extent. If these particles accumulate on the surface or inside of the components, they may affect the heat dissipation effect of the components, increase the temperature rise of the components, and even cause component failure. Therefore, the provision of the filter 40 helps to maintain the cleanliness of the interior of the electrical box. In addition, since the filter 40 can block the entry of impurities such as insects and dust, it reduces their potential damage to the components, thus helping to extend the service life of the components. In addition, by keeping the interior of the electrical box clean and insect-free, it helps to reduce faults and performance degradation caused by external factors, thereby improving the stability and reliability of the entire system. In addition, by reducing the failures and damages caused by insects and dust, the maintenance cost and downtime of the equipment can be reduced, which is particularly important for equipment that needs to run for a long time and at a high load. That is, by providing the filter 40 at the opening 21 of the air inlet duct 20 and the air outlet duct 30, the insect-proof ability of the electrical box is enhanced, the internal components are protected from insects, dust and other impurities, and the cleanliness of the interior of the electrical box is maintained, the stability and reliability of the system can be improved, and the service life of the components can be extended.

[0042] Specifically, see Figures 4 to 5As shown, the frequency conversion electrical box is hung on the front partition, the openings 21 of the air inlet pipe 20 and the air outlet pipe 30 are both facing downward, and a long distance is formed between the opening 21 and the chassis, which can prevent rainwater from flowing back into the frequency conversion electrical box and causing damage to components. In other words, by hanging the frequency conversion electrical box on the front partition, ensuring that the openings 21 of the air inlet pipe 20 and the air outlet pipe 30 are both facing downward, and maintaining a long distance between the opening 21 and the chassis, this design effectively prevents the backflow of rainwater that may occur under certain conditions (such as strong winds, water accumulation, etc.). Under the action of gravity and other natural forces, rainwater flows down along the edge of the opening 21 instead of flowing back into the electrical box, thereby greatly reducing the risk of rainwater causing damage to components. This design not only takes into account the situation of rainwater dripping directly, but also takes into account the risk that rainwater may enter the electrical box through other means (such as splashing, backflow, etc.). By ensuring that the opening 21 is facing downward and keeping a certain distance from the chassis, a natural waterproof barrier is formed, which enhances the overall waterproof performance of the electrical box. In addition, components are the core part of the electrical box and are very sensitive to humidity and moisture. By taking such waterproof measures, it can be ensured that the components work in a dry and safe environment, avoiding problems such as short circuits, corrosion, performance degradation, or even complete failure caused by external factors such as rain. In addition, the improvement of waterproof performance means that the electrical box can maintain normal operation under a wider range of weather conditions, and will not fail or degrade due to external factors such as rain, which greatly improves the reliability and stability of the entire system and ensures the long-term stable operation of the equipment. In addition, since the components are better protected from waterproofing, the failure and damage caused by external factors such as rain are reduced, so the maintenance cost and downtime of the equipment can be reduced, which is especially important for industrial equipment that requires continuous operation and efficient maintenance.

[0043] In one embodiment, the air inlet pipe 20 and the air outlet pipe 30 have the same structure.

[0044] Specifically, when the air inlet duct 20 and the air outlet duct 30 adopt the same structural design, the design and manufacturing process can be greatly simplified, and the manufacturer does not need to design different molds, production lines and process flows for two different pipes, thereby reducing production costs and time. At the same time, this consistency also helps to improve production efficiency and product quality. In addition, during maintenance and replacement, if the air inlet duct 20 and the air outlet duct 30 have the same structure, they are interchangeable to a certain extent, which means that when replacement or repair is required, it is easier to find replacement parts, reducing the types and quantities of spare parts inventory, and also reducing the complexity and time cost of maintenance. In addition, although the functions of the air inlet duct 20 and the air outlet duct 30 are different (one is used to introduce external air and the other is used to exhaust internal hot air), the same structural design may mean that their optimization in terms of air flow is consistent, and this consistency helps to ensure that the air can flow smoothly inside the electrical box, improve the heat dissipation efficiency, and thus reduce the temperature rise of components. In addition, in terms of appearance design, the air inlet duct 20 and the air outlet duct 30 of the same structure can make the overall appearance of the electrical box more unified and beautiful, and this coordination and consistency in design help to enhance the overall image and grade of the product. In addition, the use of the air inlet duct 20 and the air outlet duct 30 of the same structure helps promote the standardization and modular design of the product. The standardized design can reduce the differences between different products and improve the versatility and maintainability of the product; while the modular design can make the product easier to upgrade and expand to meet different usage requirements.

[0045] In one embodiment, a seal is provided at the connection between the air inlet pipe 20 and the box body 10 .

[0046] Specifically, a seal is provided at the connection between the air inlet pipe 20 and the box body 10 to form an effective waterproof barrier. The seal is usually made of water-resistant and aging-resistant materials, has good elasticity and sealing performance, and can fit tightly at the connection to prevent moisture penetration. In addition, components are the most critical part of the electrical box and are very sensitive to humidity and moisture. By enhancing the waterproof sealing performance, it can ensure that the components work in a dry and safe environment, avoiding problems such as short circuit, corrosion, performance degradation, and even complete failure caused by moisture and moisture. In addition, the improvement of waterproof sealing performance means that the electrical box can maintain normal operation under severe weather conditions, and will not fail or degrade due to external factors such as rain, which greatly improves the reliability and stability of the entire system and ensures the long-term stable operation of the equipment. In addition, since the components are better protected from waterproofing and the damage caused by moisture and moisture is reduced, the service life of the components can be extended and the overall maintenance cost of the equipment can be reduced. In addition, in many industries and application scenarios, electrical equipment needs to meet specific safety standards and specifications. Enhancing waterproof sealing performance is one of the important measures to meet these standards and specifications, which helps to improve the safety and market competitiveness of products.

[0047] In one embodiment, the sealing member is sealing putty or tin foil.

[0048] Specifically, the sealing glue has good viscosity and plasticity, and can fit tightly at the connection between the air inlet pipe 20 and the box body 10 to form a solid waterproof barrier. This sealing method can effectively prevent rainwater, moisture and other external moisture from penetrating into the interior of the electrical box through the gap, protecting the internal components from moisture damage. In addition, the sealing glue usually has high weather resistance, can resist the influence of harsh environmental conditions such as ultraviolet rays, high temperature, low temperature, and maintain a long-term sealing effect, which enables it to play a good waterproof sealing role outdoors or in extreme working environments. In addition, the construction of the sealing glue is relatively simple. It can be directly applied to the connection and solidified by pressing and other methods. This construction method not only improves work efficiency, but also reduces construction difficulty and cost.

[0049] Among them, although tin foil is not as sticky as sealing putty, its good sealing and moisture-proof properties can also prevent moisture from entering the interior of the electrical box through the gap to a certain extent. Especially when used in conjunction with other sealing materials (such as tape), the effect is better. In addition, tin foil also has good conductivity, which may have additional application value in certain specific occasions. For example, tin foil can be used as an electrostatic shielding material in occasions where static electricity accumulation needs to be prevented. However, it should be noted that this feature is not its main function in the sealing application of variable frequency electrical boxes. In addition, compared with special sealing materials such as sealing putty, the cost of tin foil is usually lower. Therefore, in some occasions where the sealing performance requirements are not particularly high, you can consider using tin foil as a seal to reduce costs.

[0050] That is to say, whether it is sealing putty or tin foil as a sealant, its main function is to enhance the waterproof sealing performance of the inverter electrical box and protect the internal components from moisture and water. At the same time, they also have certain characteristics and advantages, and can be selected according to specific application scenarios and needs. It should be noted that when selecting sealants, factors such as waterproof performance, weather resistance, construction convenience and cost should be fully considered to ensure the best sealing effect.

[0051] In one embodiment, the air inlet pipe 20 is welded, clamped or sleeved on the box body 10 .

[0052] Specifically, welding is a process of connecting two or more metal parts together by heating or pressurizing (or both). In the connection between the air inlet pipe 20 and the box body 10, welding can ensure that the connection between the two is very firm and not easy to loosen or fall off, thereby ensuring the stability and safety of air circulation. The clamping is usually designed by a specific buckle or slot to enable the two parts to be tightly combined. In the connection between the air inlet pipe 20 and the box body 10, the clamping method can achieve connection conveniently and quickly, and has a certain stability, which is suitable for some occasions that require quick installation or disassembly. The sleeve connection is to insert one component into the hole or groove of another component, and achieve connection through friction, interference fit or other methods. In the connection between the air inlet pipe 20 and the box body 10, the sleeve connection method can ensure a close fit between the two and reduce the possibility of air leakage. In addition, whether it is welding, clamping or sleeve connection, these connection methods can improve the sealing performance between the air inlet pipe 20 and the box body 10 to a certain extent. In particular, the welding method can form a very tight connection with almost no gaps due to the melting and re-solidification of the metal at the welding point, so it has an excellent sealing effect. The clamping and socketing methods can also achieve better sealing performance through specific design and matching. Different connection methods are suitable for different installation needs and scenarios. For example, the welding method is suitable for occasions that require long-term fixation and have high requirements for sealing performance; the clamping method is suitable for occasions that require quick installation or disassembly; the socketing method may be more suitable for the connection between the air inlet duct 20 and the box body 10 of some specific shapes or sizes. In addition, as an important part of the frequency conversion electrical box, the air inlet duct 20, its connection method not only affects the efficiency and safety of air circulation, but also affects the stability of the entire structure. By selecting a suitable connection method (such as welding, clamping or socketing), it can be ensured that the connection between the air inlet duct 20 and the box body 10 is firm and reliable, thereby enhancing the stability of the entire structure.

[0053] In one embodiment, the air inlet pipe 20 is in an inverted L shape.

[0054] Specifically, the inverted L-shaped design can guide the air to enter the interior of the electrical box in a specific path, ensuring that the air flow is smoother and more efficient. The design of this shape may take into account the principles of aerodynamics, which helps to reduce the resistance and turbulence in the air flow process and improve the uniformity and stability of the air flow. In addition, when the internal space of the equipment is limited, the inverted L-shaped design can effectively utilize the space so that the air inlet pipe 20 can be compactly installed in the desired position. This design helps to reduce the overall size of the equipment, improve space utilization, and may reduce the amount of materials used and reduce costs. In addition, the inverted L-shaped design makes the installation of the air inlet pipe 20 more convenient and quick. At the same time, when the air inlet pipe 20 needs to be maintained or replaced, this design may also provide better accessibility and reduce the difficulty and cost of maintenance. In addition, although the inverted L-shaped design itself does not directly reduce noise and vibration, it may indirectly improve the noise and vibration performance of the equipment by optimizing the air flow path and reducing turbulence. In addition, a reasonable pipeline layout and support structure also help to reduce the transmission of noise and vibration. In addition, in certain specific environments, such as when it is necessary to avoid direct wind or to guide air flow to a specific area, the inverted L-shaped design can provide a flexible solution. By adjusting the shape and angle of the air inlet pipe 20, the air flow direction can be precisely controlled to meet specific environmental requirements. In addition, for equipment that requires heat dissipation, the inverted L-shaped air inlet pipe 20 design may help guide more air to flow through heat dissipation components (such as radiators, heat exchangers, etc.), thereby improving heat dissipation efficiency. This design helps to reduce the internal temperature of the equipment and protect components from high temperature damage.

[0055] In one embodiment, the cross-section of the air inlet duct 20 is square, that is, the air passages of the air inlet duct 20 and the air outlet duct 30 are both rectangular. Compared with other shapes (such as circular), rectangular channels may have lower air resistance under certain conditions. Although circular channels have the best fluid dynamics performance in theory, in practical applications, rectangular channels can also achieve efficient air circulation through reasonable design and optimization. In addition, the design of rectangular channels can more easily control the distribution of airflow, ensure that air flows evenly in the pipeline, reduce eddy currents and turbulence, and thus improve the overall efficiency of the ventilation system. In addition, compared with air ducts of other shapes, the manufacturing process of rectangular air ducts is relatively simple and the cost is also low, which is mainly due to the standardization and easy processing characteristics of the rectangular shape. During the installation process, the rectangular air duct can be more easily connected and fixed with other components. At the same time, the overlap of the rectangular air duct is also very convenient, which can effectively reduce air leakage and energy loss. In addition, the shape of the rectangular air duct is that the edges are inclined outward. This design enables the air duct to better withstand the effects of wind pressure and has higher stability and safety. Through reasonable design and optimization, the rectangular air duct can reduce the vibration and noise caused by air flow and improve the smoothness and comfort of the system operation.

[0056] In one embodiment, a heat sink is further provided on the surface of the box body 10 .

[0057] Specifically, the heat sink is usually made of a material with good thermal conductivity, such as aluminum alloy or copper, which can quickly absorb the heat inside the box body 10 and quickly transfer the heat to the air through its large-area sheet structure. Compared with a box body 10 without a heat sink, a box body 10 with a heat sink can more effectively reduce the internal temperature and improve the heat dissipation efficiency. In addition, in electronic devices such as frequency conversion electrical boxes, internal components will generate a large amount of heat during long-term operation. If this heat cannot be dissipated in time, it will cause the temperature of the components to rise, thereby affecting their performance and life. The presence of the heat sink can further effectively export heat, reduce the operating temperature of the components, and thus protect them from high temperature damage.

[0058] The utility model also discloses a window type air conditioner, comprising the frequency conversion electrical appliance box as described above.

[0059] Specifically, when the window air conditioner is in operation, as the fan runs, forced convection is formed on the outdoor side, and the air circulation causes air to enter the electrical box from the air inlet pipe, causing air disturbance inside the electrical box, and flowing out of the electrical box from the air outlet pipe, while taking away the heat inside the electrical box, reducing the internal ambient temperature of the electrical box, and reducing the temperature rise of components. In other words, the variable frequency electrical box in the utility model can not only dissipate heat by using the original radiator to use outdoor air cooling, but also the open structure of the electrical box can effectively reduce the internal temperature of the electrical box and reduce the temperature rise of the heating elements inside the variable frequency electrical box. When the outdoor ambient temperature is high, the cooling operation increases the load of the whole machine, the interior of the electrical box is connected to the outdoor environment, and the heat inside the electrical box is taken away by air flow, reducing the temperature rise of components, protecting the components from damage, and ensuring the stable operation of the whole machine. The operating frequency of the whole machine will not be reduced due to excessive temperature rise, affecting the cooling comfort.

[0060] Specifically, the inverter in the variable frequency electrical box controls the power supply voltage and frequency of the AC motor to achieve precise control of the motor speed, which enables the air conditioner to automatically adjust the cooling or heating capacity according to the changes in the indoor temperature, avoiding the energy waste caused by the frequent start and stop of the traditional fixed frequency air conditioner. Therefore, this window air conditioner has significant advantages in energy saving and consumption reduction. In addition, the application of variable frequency technology enables the air conditioner to operate at optimal efficiency, and maintain a high operating efficiency regardless of light load or heavy load conditions, which helps to improve the overall performance of the air conditioner, shorten the time to reach the set temperature, and enhance the user experience. In addition, the variable frequency technology can realize the soft start and soft stop of the motor, reducing the mechanical vibration and noise of the motor during the start and stop process, which makes the window air conditioner quieter during operation and improves the user's living comfort. In addition, the variable frequency electrical box enables the window air conditioner to adapt to different voltage and frequency environments, enhancing its applicability and flexibility. Whether in a home environment or a commercial place, it can provide good cooling or heating effects.

[0061] To summarize, by designing the air inlet and outlet ducts and ensuring that they are connected to the inside of the box, an air circulation path is formed, so that external air can enter the electrical box along the air inlet duct and exchange heat with the internal components. After absorbing the heat generated by the components, it is discharged to the external environment through the air outlet duct. This process effectively reduces the temperature inside the electrical box, reduces the risk of performance degradation, damage or even failure of components due to overheating, and improves the safety and reliability of the air conditioner operation.

[0062] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A frequency conversion electrical box, characterized in that: include: A box body, wherein components are arranged inside the box body, the box body is connected with an air inlet pipe and an air outlet pipe, the air inlet pipe, the box body and the air outlet pipe are interconnected to connect to the external environment; air enters the box body along the air inlet pipe to make the air inside the box body flow until it flows out along the air outlet pipe; the air inlet pipe and the air outlet pipe are both provided with openings, and the openings are arranged downward.

2. The frequency conversion electrical box according to claim 1, characterized in that: A filter screen is also provided at the opening.

3. The frequency conversion electrical box according to claim 1, characterized in that: The air inlet pipe and the air outlet pipe have the same structure.

4. The frequency conversion electrical box according to claim 3, characterized in that: A sealing member is provided at the connection between the air inlet pipe and the box body.

5. The frequency conversion electrical box according to claim 4, characterized in that: The sealing member is sealing putty or tin foil.

6. The frequency conversion electrical box according to claim 3, characterized in that: The air inlet pipe is welded, clamped or sleeved on the box body.

7. The frequency conversion electrical box according to claim 3, characterized in that: The air inlet pipe is in an inverted L shape.

8. The frequency conversion electrical box according to claim 3, characterized in that: The cross section of the air inlet pipe is square.

9. The frequency conversion electrical box according to claim 1, characterized in that: The surface of the box body is also provided with a heat sink.

10. A window air conditioner, characterized in that: It comprises a frequency conversion electrical box as described in any one of claims 1 to 9.

Images