Air conditioner

Abstract

The embodiment of the utility model provides an air conditioner which comprises an air supply pipeline extending to a target space, and an air inlet duct and an air return duct are arranged in the air supply pipeline; the machine body comprises a shell, an evaporator, a condenser, a compressor and a centrifugal fan, the evaporator, the condenser, the compressor and the centrifugal fan are arranged in the shell, the evaporator is located at the output end of the air return duct, and air in the target space flows to the evaporator from the air return duct; the input end of the centrifugal fan communicates with the downstream of the evaporator, the output end of the centrifugal fan communicates with the input end of the air inlet duct, and air subjected to heat exchange through the evaporator is blown into the air inlet duct through the centrifugal fan and then flows into the target space. The centrifugal fan with high air pressure is arranged, and the high air pressure can ensure that air can efficiently and stably flow in the air supply pipeline. In addition, due to the high air pressure characteristic of the centrifugal fan, smooth circulation of air in the air conditioner can be guaranteed, energy loss caused by unsmooth air flowing is reduced, the energy efficiency ratio of the air conditioner is increased, and the more energy-saving and efficient operation state is achieved.

Description

[0001] This application claims priority to Chinese Patent Application No. 202411790493.3, filed on December 6, 2024, entitled "An Air Conditioner", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of air conditioning technology, and more particularly to an air conditioner. Background Technology

[0003] Traditional household wall-mounted air conditioners are divided into indoor and outdoor units. However, regardless of the type of model, because the indoor unit contains core components such as heat exchangers, motors, and fan blades, its external size cannot be designed to be exquisite and compact, thus making it difficult to integrate well with the home decoration environment.

[0004] Currently, some commercial kitchen air conditioners deliver air to the kitchen through ducts. However, due to the large size of these ducts, the return air pressure cannot meet user needs, and the lack of return air makes them unsuitable for home settings, let alone integrate with furniture. Utility Model Content

[0005] This application provides an air conditioner that addresses the technical problems in related technologies, such as large duct size, insufficient return air pressure to meet user needs, lack of return air making it unsuitable for home settings, and inability to integrate with furniture.

[0006] This application provides an air conditioner, including:

[0007] An air supply duct extends to the target space, and the air supply duct is equipped with an air inlet duct and an air return duct.

[0008] The unit includes a housing and an evaporator, a condenser, a compressor, and a centrifugal fan disposed within the housing. The evaporator is located at the output end of the return air duct, and the gas in the target space flows to the evaporator through the return air duct.

[0009] The input end of the centrifugal fan is connected to the downstream of the evaporator, and the output end of the centrifugal fan is connected to the input end of the air inlet duct. The gas that has undergone heat exchange through the evaporator is blown into the air inlet duct by the centrifugal fan and then flows into the target space.

[0010] The air conditioner provided in this application embodiment uses a centrifugal fan with high air pressure to ensure efficient and stable airflow within the air supply duct.

[0011] Secondly, the powerful airflow generated by the centrifugal fan can quickly blow air across the evaporator surface, prolonging the contact time between the air and the refrigerant and increasing the contact area between them. This allows heat in the air to be transferred to the refrigerant more efficiently (in cooling mode), or heat in the refrigerant to be transferred to the air more effectively (in heating mode), thus significantly enhancing the cooling or heating effect of the air conditioner.

[0012] In addition, the high air pressure characteristics of centrifugal fans can ensure smooth air circulation inside the air conditioner, reduce energy loss caused by poor air flow, improve the energy efficiency ratio of the air conditioner, and achieve a more energy-saving and efficient operating state.

[0013] In the aforementioned air conditioner, optionally, the centrifugal fan has an air volume range of 670-900 m³ / h. 3 / h.

[0014] With the above settings, the centrifugal fan can provide 670-900m³ of steam. 3 A fresh air volume of / h can accelerate the air exchange in the user's room, thereby improving indoor air quality with high efficiency and enhancing the user experience.

[0015] In the aforementioned air conditioner, optionally, the evaporator is inclined, and the input end of the centrifugal fan faces the inclined surface of the evaporator.

[0016] The above design increases the evaporator's length within a limited space, improving heat exchange area utilization. Simultaneously, the inclined evaporator surface facilitates a more uniform airflow velocity distribution, reducing dead zones and ensuring more thorough contact between the air and the evaporator surface, thus enhancing heat exchange efficiency. Furthermore, it reduces flow losses during the airflow from the evaporator to the centrifugal fan, lowers airflow resistance, and improves the centrifugal fan's intake efficiency, thereby ensuring the centrifugal fan can more effectively deliver the heat-exchanged air.

[0017] In the air conditioner described above, optionally, the housing also has a first opening and a second opening arranged adjacent to each other, the first opening corresponding to the input end of the air inlet duct and the second opening corresponding to the output end of the air return duct.

[0018] The output end of the centrifugal fan corresponds to the first opening, one end of the evaporator corresponds to the second opening, and the other end of the evaporator is away from the centrifugal fan, so that the input end of the centrifugal fan faces the inclined surface.

[0019] With the above configuration, the evaporator can effectively receive air from the return air duct and guide the air to the centrifugal fan after heat exchange. The tilted setting of the evaporator further optimizes the airflow path, allowing the inlet of the centrifugal fan to directly face the tilted surface of the evaporator, thereby improving the smoothness of airflow and heat exchange efficiency.

[0020] Optionally, in the air conditioner described above, the unit body may further include an auxiliary air duct, the input end of which is connected to the second opening, and the output end of which faces the inclined surface of the evaporator.

[0021] The auxiliary air duct ensures that return air flows evenly across the inclined surface of the evaporator, increasing the contact area and time between the air and the evaporator, thereby improving heat exchange efficiency and enabling the air conditioner to more effectively regulate indoor temperature in both cooling and heating modes. Guided by the auxiliary air duct, the air is distributed more evenly on the evaporator surface, avoiding airflow concentration or dead zones. This allows for efficient heat exchange across the entire evaporator surface, improving air conditioner performance and reducing fan operating time, thus increasing the air conditioner's energy efficiency ratio and achieving energy-saving operation.

[0022] In the aforementioned air conditioner, optionally, the unit body further includes an air guide plate, which, together with the housing, forms the auxiliary air duct. The air guide plate includes:

[0023] The first air guide section is located between the evaporator and the second opening;

[0024] The second air guide section is located downstream of the first air guide section;

[0025] The air guide hole is located in the second air guide section.

[0026] The above settings ensure a stable and uniform airflow pattern before entering the evaporator, thereby improving heat exchange efficiency, optimizing the airflow path, and ultimately enhancing the overall performance and user experience of the air conditioner. Furthermore, the reduced flow resistance as air flows through the guide holes allows for smooth flow towards the evaporator's inclined surface, preventing airflow congestion caused by an insufficient guide area. This uniform air distribution and reduced flow resistance enable ample heat exchange between the air and the evaporator, further improving heat exchange efficiency.

[0027] In the air conditioner described above, optionally, the guiding area of ​​the guide hole decreases as the distance between the second air guide section and the evaporator increases along the surface extension direction of the second air guide section.

[0028] With the above configuration, the guide area is smaller near the evaporator, allowing air to be concentrated and guided to the evaporator surface, ensuring sufficient airflow in that area. Conversely, the guide area is larger further away from the evaporator, allowing for more even air distribution. This creates a uniform airflow velocity distribution on the evaporator's inclined surface, and the larger contact area between the air and the evaporator improves heat exchange efficiency.

[0029] In the air conditioner described above, optionally, the second air guide section has a first guide hole and a second guide hole with different guide areas, wherein the guide area of ​​the first guide hole is larger than the guide area of ​​the second guide hole;

[0030] The distance between the first guide hole and the evaporator is less than the distance between the second guide hole and the evaporator.

[0031] With the above configuration, the first guide hole has a large guide area and is close to the evaporator, which can generate a high airflow near the evaporator, ensuring that the air flows fully across the inclined surface of the evaporator and increasing heat exchange efficiency. The second guide hole has a smaller guide area but is farther from the evaporator, which can guide the air to other areas of the evaporator, avoiding airflow concentration and allowing the entire evaporator surface to effectively participate in heat exchange.

[0032] In the aforementioned air conditioner, optionally, the diameter of the guide hole gradually increases in the direction in which the distance between the evaporator and the second air guide section gradually increases.

[0033] By increasing the diameter of the airflow guide orifice, the airflow resistance at the orifice can be effectively reduced, decreasing the energy consumed to overcome this resistance and thus improving the overall energy efficiency ratio of the air conditioner, achieving energy-saving operation. Simultaneously, a uniform airflow distribution can also overcome the additional energy consumption caused by uneven airflow, further reducing energy loss.

[0034] In the aforementioned air conditioner, optionally, the centrifugal fan includes an impeller and a centrifugal motor. The centrifugal motor is located on the side of the impeller away from the evaporator. The output end of the centrifugal motor is connected to the impeller. The centrifugal motor is used to drive the impeller to rotate so that the gas that has been heat-exchanged by the evaporator is blown into the air inlet duct.

[0035] With the above setup, the impeller and centrifugal motor work together to generate a high-pressure airflow, meeting the air conditioning system's requirements for air circulation and delivery. In cooling or heating mode, the air that has undergone heat exchange in the evaporator needs to be delivered to the target space in a timely and efficient manner. The high-speed rotation of the impeller can blow air into the air intake duct at a high speed, ensuring the air conditioning system's air delivery efficiency.

[0036] In the air conditioner described above, optionally, a first partition is also provided inside the housing, the first partition dividing the housing into a first receiving cavity located above and a second receiving cavity located below, the evaporator and the centrifugal fan being located in the first receiving cavity, and the condenser being located in the second receiving cavity.

[0037] With the above configuration, the centrifugal fan can directly blow the air, after heat exchange in the evaporator, into the air inlet duct, reducing the tortuous flow of air within the casing, lowering flow resistance, and improving the smoothness of airflow and delivery efficiency. In this way, the airflow generated by the centrifugal fan can quickly pass over the evaporator surface, expanding the contact area and promoting sufficient heat exchange between the air and the refrigerant, thereby improving the evaporator's heat exchange efficiency.

[0038] Furthermore, during the refrigeration process, the condenser needs to release the heat from the high-temperature, high-pressure refrigerant gas to the external environment. Placing it in the lower, second-compartment housing facilitates heat sinking and dissipation, preventing heat accumulation inside the casing, improving the condenser's heat dissipation efficiency, and ensuring the efficient operation of the refrigeration cycle. Attached Figure Description

[0039] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies 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.

[0040] Figure 1 This is a schematic diagram illustrating the usage scenario of an air conditioner provided in an embodiment of this application;

[0041] Figure 2 This is a three-dimensional structural diagram of an air conditioner provided in an embodiment of this application;

[0042] Figure 3 This is a schematic diagram of the air conditioner body provided in an embodiment of this application;

[0043] Figure 4 A schematic diagram of a first structure of the air guide plate of the air conditioner body provided in an embodiment of this application;

[0044] Figure 5 A schematic diagram of a second structure of the air guide plate of the air conditioner body provided in an embodiment of this application;

[0045] Figure 6 This is a schematic diagram of a third structure of the air deflector of the air conditioner body provided in an embodiment of this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 10. Air conditioning; A. Target space;

[0048] 100. Fuselage; 110. Shell; 111. First opening; 112. Second opening; 113. First partition; 114. First receiving cavity; 115. Second receiving cavity; 1151. First sub-cavity; 1152. Second sub-cavity; 116. Second partition;

[0049] 120. Evaporator; 130. Condenser; 140. Compressor;

[0050] 150. Centrifugal fan; 160. Axial flow motor; 170. Auxiliary air duct;

[0051] 180. Air guide plate; 181. First air guide section; 182. Second air guide section; 183. Air guide hole; 184. First air guide hole; 185. Second air guide hole;

[0052] 200. Supply air duct; 201. Inlet air duct; 202. Return air duct. Detailed Implementation

[0053] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0054] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0055] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are 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.

[0057] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0060] Reference Figure 1 This application provides an air conditioner 10, including a body 100 and an air supply duct 200. The air supply duct 200 is connected to the body 100 and extends to a target space A. That is, the body 100 is located outside the target space A, and the air supply duct 200 is located inside the target space A.

[0061] It is understood that target space A refers to the room or cabinet where air conditioner 10 is installed. The following example uses target space A as a room. Correspondingly, outside target space A refers to the outside of the room, i.e., outdoors, and inside target space A refers to the inside of the room, i.e., indoors. Therefore, the unit 100 being located outside target space A means that the unit 100 is located outdoors, and the air duct 200 being located inside target space A means that the air duct 200 is located indoors.

[0062] With the above configuration, the air conditioner 10 places the body 100 outdoors, with only the air supply duct 200 located indoors. The air supply duct 200 is connected to the body 100. The heat exchanger, motor, fan blades and other components inside the body 100 are far away from the indoor space, and the indoor part no longer needs to accommodate the above components, thereby overcoming the limitation of the large external size of the indoor unit of the traditional air conditioner 10 due to the internal structure.

[0063] In this way, the size of the indoor unit of the air conditioner 10 can be significantly reduced, thereby minimizing the space it occupies. Furthermore, the smaller size of the air duct 200 facilitates customized design, allowing it to be concealed within ceilings, walls, or furniture. This further enhances the harmony between the air conditioner 10 and the home environment, avoiding the negative impact on the aesthetics of traditional air conditioner 10 indoor units and commercial kitchen air conditioner 10 ducts due to their large size and obtrusive appearance. This provides users with a solution that is both efficient and aesthetically pleasing.

[0064] Reference Figure 2 As an optional implementation, the housing 100 includes a casing 110, an evaporator 120, a condenser 130, a compressor 140, and a centrifugal fan 150.

[0065] Specifically, a cavity is formed inside the housing 110, and the evaporator 120, condenser 130, compressor 140 and fan are all located inside the housing 110, i.e., the cavity. The housing 110 can protect and house the internal components, prevent the external environment from damaging the internal components, and facilitate the installation and fixing of the components.

[0066] In cooling mode, the evaporator 120 causes the refrigerant to evaporate and absorb heat, thereby reducing the temperature of the air flowing over its surface and cooling the indoor air. In heating mode, the evaporator 120 causes the refrigerant to condense and release heat, heating the air flowing over it and raising the indoor temperature.

[0067] The condenser 130 is used for heat dissipation, cooling the high-temperature, high-pressure refrigerant gas discharged from the compressor 140 into a liquid state and releasing heat to the external environment. During the refrigeration process, heat release occurs outdoors, thus ensuring the continuous operation of the refrigeration cycle.

[0068] The compressor 140 is used to draw in low-temperature, low-pressure refrigerant vapor from the evaporator 120, compress it into high-temperature, high-pressure refrigerant gas, provide power for the circulation of refrigerant in the air conditioner 10, and drive the refrigeration cycle of the air conditioner 10.

[0069] It is understandable that an air inlet duct 201 and a return air duct 202 can be installed in the air supply duct. The evaporator 120 of the air inlet duct 201 is located at the output end of the return air duct 202. The gas in the target space A flows from the return air duct 202 to the evaporator 120.

[0070] The input end of the centrifugal fan 150 is connected to the downstream of the evaporator 120, and the output end of the centrifugal fan 150 is connected to the input end of the air inlet duct 201. The centrifugal fan 150 is used to generate airflow, which can blow air across the surface of the evaporator 120, promote heat exchange between the air and the refrigerant, and enable the heat-exchanged air to be delivered into the target space A, thereby achieving temperature regulation of the indoor air.

[0071] Understandably, the centrifugal fan 150 has high air pressure, which ensures efficient and stable airflow within the air supply duct 200. Even in the face of complex situations such as bends and narrow passages in the duct, sufficient pressure can overcome the corresponding resistance, thereby ensuring that air can be delivered evenly and smoothly to all locations in the target space A, effectively improving the air supply efficiency and overall coverage of the air conditioner 10.

[0072] Secondly, the higher air pressure on the surface of the evaporator 120 facilitates sufficient heat exchange between the air and the refrigerant. The powerful airflow generated by the centrifugal fan 150 quickly blows air across the surface of the evaporator 120, extending the contact time between the air and the refrigerant and increasing the contact area between them. This allows heat in the air to be transferred to the refrigerant more efficiently (in cooling mode), or heat in the refrigerant to be transferred to the air more effectively (in heating mode), thereby significantly enhancing the cooling or heating effect of the air conditioner 10.

[0073] In addition, the high air pressure characteristics of the centrifugal fan 150 can ensure smooth air circulation inside the air conditioner 10, reduce energy loss caused by poor air flow, improve the energy efficiency ratio of the air conditioner 10, and achieve a more energy-saving and efficient operating state.

[0074] Reference Figure 2 In some embodiments, the air supply duct 200 is used to supply air to the air conditioner 10, that is, to deliver the air processed by the air conditioner 10 body 100 to the target space A and realize the circulation of indoor air. The air supply duct 200 is provided with an air inlet duct 201 and a return air duct 202.

[0075] The air inlet duct 201 can transport the gas blown out by the fan after heat exchange in the evaporator 120 to the target space A, ensuring that the cooled or heated air can enter the room and effectively regulate the indoor temperature and humidity.

[0076] The return air duct 202 can receive air from the target space A and return it to the interior of the unit 100, where it undergoes heat exchange again through components such as the evaporator 120, thus achieving air recycling and maintaining stable indoor air temperature and humidity.

[0077] The air inlet duct 201 and the return air duct 202 are arranged side by side. This layout makes the structure of the air supply duct 200 more compact, and it can realize the air intake and exhaust circulation in a limited space. On the one hand, it can save space and is suitable for home environments, and can better integrate with interior decoration and furniture layout. On the other hand, it can reduce air flow resistance and energy loss, improve airflow smoothness, reduce fan energy consumption, and improve the heat exchange efficiency of heat exchange components such as evaporator 120, thereby reducing refrigerant consumption and compressor 140 load, thus improving the overall energy efficiency of air conditioner 10.

[0078] After heat exchange in the evaporator 120, the gas is blown into the air inlet duct 201 by the fan and then flows into the target space A. The gas in the target space A enters the housing 110 through the return air duct 202.

[0079] The working process of the air conditioner 10 described above is as follows:

[0080] Compressor 140 operates, compressing low-temperature, low-pressure refrigerant vapor into high-temperature, high-pressure refrigerant gas, which is then discharged into condenser 130. In condenser 130, the refrigerant gas releases heat and condenses into a liquid state. The liquid refrigerant enters evaporator 120. In evaporator 120, the refrigerant absorbs heat from the air and evaporates into a gaseous state, which is then drawn back into compressor 140, completing the cycle. Simultaneously, fan operates, drawing air from target space A into unit 100. The air passes through evaporator 120, exchanging heat with the refrigerant and lowering its temperature. After heat exchange, the air is blown by fan into air inlet duct 201 of air supply duct 200, flowing towards target space A to regulate the indoor temperature. Air from target space A returns to unit 100 through return air duct 202, passing through evaporator 120 again for heat exchange, forming a cycle.

[0081] As an optional implementation, the centrifugal fan 150 has an air volume range of 670-900 m³ / h. 3 / h. For example, the air volume could be 670m³ / h. 3 / h, 700m 3 / h, 750m 3 / h、800m 3 / h、900m 3 / h etc.

[0082] With the above settings, centrifugal fan 150 can provide 670-900m³ of steam. 3 A fresh air volume of / h can accelerate the air exchange in the user's room, thereby improving indoor air quality with high efficiency and enhancing the user experience.

[0083] Reference Figure 2 As an optional implementation, the evaporator 120 is installed at an angle relative to the horizontal plane, for example, by tilting upwards from front to back along the depth direction of the air conditioner 10.

[0084] The above-described installation method can increase the length of the evaporator 120 within a limited space, thereby improving the utilization rate of the heat exchange area. At the same time, the inclined surface of the evaporator 120 facilitates a more uniform airflow velocity distribution, reduces dead zones in the airflow, and allows for more thorough contact between the air and the surface of the evaporator 120, thus improving heat exchange efficiency.

[0085] The inlet of the centrifugal fan 150 faces the inclined surface of the evaporator 120, allowing the centrifugal fan 150 to more directly draw in the air that has undergone heat exchange in the evaporator 120. This arrangement reduces flow losses during the airflow from the evaporator 120 to the centrifugal fan 150, lowers airflow resistance, and improves the intake efficiency of the centrifugal fan 150, thereby ensuring that the centrifugal fan 150 can more effectively deliver the heat-exchanged air.

[0086] Reference Figure 3 As an optional implementation, the housing 110 also has a first opening 111 and a second opening 112 arranged adjacent to each other. The first opening 111 corresponds to the input end of the air inlet duct 201 and is used to guide outside air into the air conditioner 10. The second opening 112 corresponds to the output end of the return air duct 202 and is used to receive indoor circulating air.

[0087] The output end of the centrifugal fan 150 corresponds to the first opening 111. The airflow generated by the centrifugal fan 150 will directly enter the air inlet duct 201 through the first opening 111 and then be transported to various indoor areas to ensure that the air can be efficiently introduced into the air conditioner 10 and processed.

[0088] One end of the evaporator 120 corresponds to the second opening 112, and the other end of the evaporator 120 is away from the centrifugal fan 150, so that the inlet of the centrifugal fan 150 faces the inclined surface. In this way, the evaporator 120 can effectively receive air from the return air duct 202 and guide the air to the centrifugal fan 150 after heat exchange. The inclined arrangement of the evaporator 120 further optimizes the airflow path, allowing the inlet of the centrifugal fan 150 to directly face the inclined surface of the evaporator 120, thereby improving the smoothness of airflow and heat exchange efficiency.

[0089] It should be noted that the shapes of the first opening 111 and the second opening 112 can be matched with the shapes of the air inlet duct 201 and the air return duct 202, respectively, to ensure that the air inlet duct 201 and the air return duct 202 are tightly connected to the fuselage 100.

[0090] Reference Figure 3 As an optional implementation, the unit body 100 also includes an auxiliary air duct 170, the input end of which is connected to the second opening 112, and the output end of which faces the inclined surface of the evaporator 120. In this way, the auxiliary air duct 170 can receive return air from the room, and the inclined surface facing the evaporator 120 allows the return air to flow smoothly to the evaporator 120 for heat exchange.

[0091] Understandably, the auxiliary air duct 170 can ensure that the return air can flow evenly over the inclined surface of the evaporator 120, thereby increasing the contact area and time between the air and the evaporator 120, thus improving the heat exchange efficiency and enabling the air conditioner 10 to more effectively regulate the indoor temperature in either cooling or heating mode.

[0092] In addition, with the guidance of the auxiliary air duct 170, the air is distributed more evenly on the surface of the evaporator 120, thus avoiding the problem of concentrated airflow or dead corners. This allows the entire surface of the evaporator 120 to efficiently exchange heat, which can improve the performance of the air conditioner 10 on the one hand, and reduce the running time of the fan on the other hand, thereby improving the energy efficiency ratio of the air conditioner 10 and achieving energy-saving operation.

[0093] Reference Figure 3 and Figure 4 As an optional implementation, the casing 100 also includes an air guide plate 180, which, together with the housing 110, forms an auxiliary air duct 170. The air guide plate 180 includes a first air guide section 181, a second air guide section 182, and a guide hole 183. Air in the return air duct 202 flows sequentially through the first air guide section 181, the second air guide section 182, and the guide hole 183 towards the inclined surface of the evaporator 120.

[0094] Specifically, the first air guide section 181 is located between the evaporator 120 and the second opening 112. The first air guide section 181 is used to initially guide the return air from the second opening 112 to ensure that the air can flow to the second air guide section 182.

[0095] The second air guide section 182 is located downstream of the first air guide section 181 and is used to continue to guide the air provided by the first air guide section 181, ensuring that the air can flow through the guide hole 183 and reduce flow resistance and energy loss.

[0096] The guide hole 183 is opened in the second air guide section 182. The setting of the guide hole 183 can change the air flow rate and velocity, thereby optimizing the air distribution on the surface of the evaporator 120 and improving the utilization efficiency of the evaporator 120.

[0097] Understandably, in air conditioner 10, return air first enters auxiliary air duct 170 through second opening 112. First guide section 181 initially guides the air towards second guide section 182. Further guided by second guide section 182, the air flows towards guide orifice 183. Guide orifice 183 ensures the air flows towards the inclined surface of evaporator 120 at a suitable flow rate and velocity. This progressive guidance and regulation design ensures stable airflow and uniform distribution before entering evaporator 120, thereby improving heat exchange efficiency, optimizing airflow path, and ultimately enhancing the overall performance and user experience of air conditioner 10.

[0098] It should be noted that the flow area of ​​the guide hole 183 is larger than that of the second opening 112. When air flows through the guide hole 183, the flow resistance is significantly reduced, allowing the air to flow smoothly to the inclined surface of the evaporator 120, avoiding airflow congestion caused by an insufficient flow area. The uniform air distribution and reduced flow resistance enable the air to fully exchange heat with the evaporator 120, improving heat exchange efficiency.

[0099] Reference Figure 3 and Figure 4 As an optional implementation, along the surface extension direction of the second air guide section 182, the guiding area of ​​the guide hole 183 decreases as the distance between the second air guide section 182 and the evaporator 120 increases.

[0100] It should be noted that the first air guide section 181 and the second air guide section 182 can be located on the same plane, and the direction of extension along the surface of the second air guide section 182 refers to the direction of extension along the surface of the guide plate 180. Figures 3-6 B is shown in the diagram.

[0101] There may be multiple such guide plates extending along the surface of the guide plate 180. In this embodiment, the surface extension direction of the guide plate 180 refers to the direction of the centrifugal fan 150 toward the evaporator 120.

[0102] Understandably, the flow area is smaller near the evaporator 120, so that the air is concentrated and guided to the surface of the evaporator 120, ensuring sufficient airflow in that area; while the flow area is larger away from the evaporator 120, so that the air can be distributed more evenly.

[0103] With the above settings, the air can form a uniform flow velocity distribution on the inclined surface of the evaporator 120, and the contact area between the air and the evaporator 120 is large, which can improve the heat exchange efficiency.

[0104] Understandably, the number of guide holes 183 can be arbitrary.

[0105] Reference Figure 5 In some embodiments, the number of guide holes 183 is multiple. For example, the second air guide section 182 has a first guide hole 184 and a second guide hole 185 with different guiding areas.

[0106] Specifically, the flow guiding area of ​​the first flow guiding hole 184 is greater than that of the second flow guiding hole 185, and the distance between the first flow guiding hole 184 and the evaporator 120 is less than the distance between the second flow guiding hole 185 and the evaporator 120.

[0107] Understandably, according to fluid mechanics principles, the smaller diameter of the first guide hole 184 results in a relatively faster air velocity and a relatively smaller flow rate. The smaller diameter constrains the airflow, reducing the amount of air passing through in the same time interval, but increasing the velocity. This high velocity helps create strong turbulence near the evaporator 120, allowing air to quickly and fully contact the evaporator 120 surface, enhancing heat transfer. Correspondingly, the larger diameter of the second guide hole 185 allows more air to pass through, increasing the airflow rate in this area while relatively reducing the velocity. This ensures that the air is evenly and stably distributed across the entire inclined surface of the evaporator 120, preventing congestion or uneven distribution of airflow in areas far from the evaporator 120, further improving heat transfer efficiency.

[0108] As can be seen from the above, the first guide hole 184 has a large guide area and is close to the evaporator 120, which can generate a high airflow near the evaporator 120, ensuring that the air flows fully across the inclined surface of the evaporator 120 and increasing the heat exchange efficiency. The second guide hole 185 has a smaller guide area, but is farther from the evaporator 120, which can guide the air to other areas of the evaporator 120, avoiding airflow concentration and allowing the entire surface of the evaporator 120 to effectively participate in heat exchange.

[0109] It is understandable that a larger flow guide area corresponds to a shorter flow distance, while a smaller flow guide area corresponds to a longer flow distance. In this way, the airflow between the first flow guide hole 184, the second flow guide hole 185 and the evaporator 120 is similar, the evaporator 120 has a higher heat exchange efficiency, and thus the working efficiency of the air conditioner 10 can be improved.

[0110] It should be noted that the shape of the first guide hole 184 and the shape of the second guide hole 185 can be the same or different. For example, they can be circular, triangular, or rectangular.

[0111] Reference Figure 6 In some other embodiments, the number of guide holes 183 is one, and the diameter of the guide hole 183 gradually increases in the direction in which the distance between the evaporator 120 and the second air guide section 182 gradually increases.

[0112] Based on the aforementioned fluid mechanics concepts, it is known that gradually increasing the aperture aligns with the natural tendency of airflow. During airflow, as the flow path extends, airflow resistance gradually accumulates.

[0113] By increasing the diameter of the guide hole 183, the airflow resistance at the guide hole 183 can be effectively reduced, thus reducing the energy consumed to overcome the resistance and improving the overall energy efficiency ratio of the air conditioner 10, achieving energy-saving operation. At the same time, a uniform airflow distribution can also overcome the additional energy consumption caused by uneven airflow, further reducing energy loss.

[0114] It should be noted that the shape of the guide hole 183 can be a regular shape such as a cone or a triangle, or it can be set to an irregular shape according to user requirements.

[0115] As an alternative implementation, the centrifugal fan 150 includes an impeller (not shown) and a centrifugal motor (not shown).

[0116] The impeller typically consists of multiple blades arranged radially around a central axis. Its rotation performs work on the air, imparting kinetic and pressure energy. The centrifugal motor is the power source driving the impeller's rotation. Through its output connection to the impeller, it converts electrical energy into mechanical energy, thus driving the impeller's rotation.

[0117] The centrifugal motor is located on the side of the impeller furthest from the evaporator 120. It is understandable that the centrifugal motor generates some noise during operation. Placing it on the side of the impeller furthest from the evaporator 120 allows for some isolation and buffering of the noise through the impeller and airflow, reducing direct noise transmission into the indoor space. This reduces noise interference from the air conditioner 10 during operation and improves user comfort.

[0118] The output end of the centrifugal motor is connected to the impeller, which drives the impeller to rotate so that the gas after heat exchange in the evaporator 120 is blown into the air inlet duct 201. The cooperation between the impeller and the centrifugal motor can generate an airflow with high air pressure, meeting the air circulation and delivery requirements of the air conditioner 10. In cooling or heating mode, the air after heat exchange in the evaporator 120 needs to be delivered to the target space A in a timely and efficient manner. The high-speed rotation of the impeller can blow the air into the air inlet duct 201 at a high speed, ensuring the air delivery efficiency of the air conditioner 10.

[0119] Reference Figure 3 As an optional implementation, the housing 110 is further provided with a first partition 113, which divides the housing 110 into a first receiving cavity 114 located above and a second receiving cavity 115 located below. The first partition 113 can improve the structural strength of the housing 110, making it more stable during operation and reducing component displacement or damage caused by vibration or external forces.

[0120] The evaporator 120 and centrifugal fan 150 are located in the first housing cavity 114, and the condenser 130 is located in the second housing cavity 115. This separate layout facilitates the orderly transfer and dissipation of heat, avoids mutual interference between hot and cold air currents inside the shell 110, and improves heat exchange efficiency.

[0121] The centrifugal fan 150 directly blows the air, after heat exchange in the evaporator 120, into the air inlet duct 201, reducing the tortuous flow of air within the casing 110, lowering flow resistance, and improving the smoothness of airflow and delivery efficiency. In this way, the airflow generated by the centrifugal fan 150 can quickly pass over the surface of the evaporator 120, expanding the contact area, promoting sufficient heat exchange between the air and the refrigerant, and improving the heat exchange efficiency of the evaporator 120.

[0122] Furthermore, during the refrigeration process, the condenser 130 needs to release the heat of the high-temperature, high-pressure refrigerant gas to the external environment. Placing it in the lower second housing 115 facilitates heat sinking and dissipation, prevents heat accumulation inside the housing 110, improves the heat dissipation effect of the condenser 130, and ensures efficient operation of the refrigeration cycle.

[0123] As an optional implementation, the air supply duct 200 is formed by one or more duct units (not shown in the figure). When the air supply duct 200 is formed by connecting multiple duct units to each other, the multiple duct units are interlocked and spliced ​​together to form the entire duct.

[0124] Specifically, retaining rings are installed at the connection points between pipe units to lock and seal the ends of the pipe units on both sides.

[0125] Reference Figure 3 In some embodiments, the second receiving cavity 115 may further include a second partition 116, which divides the second receiving cavity 115 into a first sub-cavity 1151 and a second sub-cavity 1152. The evaporator 120 is located in the first sub-cavity 1151, and the compressor 140 is located in the second sub-cavity 1152. The first sub-cavity 1151 may further include a motor (not shown) and an axial flow fan 160. The motor drives the axial flow fan 160 to rotate to dissipate heat from the condenser 130. The axial flow fan 160 removes heat from the condenser 130 during rotation, preventing the condenser 130 from overheating.

[0126] Furthermore, in some embodiments, at least one side wall of the first sub-cavity 1151 is provided with an air outlet (not shown in the figure), and a grille (not shown in the figure) is provided at the air outlet. The condenser 130 is arranged around the side wall of the first sub-cavity 1151, which does not have an air outlet. The grille can prevent external dust from entering the second receiving cavity 115, and can also protect the outside world from harming personnel outside the fan.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0128] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. An air conditioner, characterized in that, include: An air supply duct extends to the target space, and the air supply duct is equipped with an air inlet duct and an air return duct. The unit includes a housing and an evaporator, a condenser, a compressor, and a centrifugal fan disposed within the housing. The evaporator is located at the output end of the return air duct, and the gas in the target space flows to the evaporator through the return air duct. The input end of the centrifugal fan is connected to the downstream of the evaporator, and the output end of the centrifugal fan is connected to the input end of the air inlet duct. The gas that has undergone heat exchange through the evaporator is blown into the air inlet duct by the centrifugal fan and then flows into the target space.

2. The air conditioner according to claim 1, characterized in that, The centrifugal fan has an air volume range of 670-900 m³ / h. 3 / h.

3. The air conditioner according to claim 1, characterized in that, The evaporator is inclined, and the input end of the centrifugal fan faces the inclined surface of the evaporator.

4. The air conditioner according to claim 3, characterized in that, The housing also has a first opening and a second opening arranged adjacent to each other, the first opening corresponding to the input end of the air inlet duct and the second opening corresponding to the output end of the air return duct. The output end of the centrifugal fan corresponds to the first opening, one end of the evaporator corresponds to the second opening, and the other end of the evaporator is away from the centrifugal fan, so that the input end of the centrifugal fan faces the inclined surface.

5. The air conditioner according to claim 4, characterized in that, The housing also includes an auxiliary air duct, the input end of which is connected to the second opening, and the output end of which faces the inclined surface of the evaporator.

6. The air conditioner according to claim 5, characterized in that, The fuselage also includes an air guide plate, which, together with the housing, forms the auxiliary air duct. The air guide plate includes: The first air guide section is located between the evaporator and the second opening; The second air guide section is located downstream of the first air guide section; The air guide hole is located in the second air guide section.

7. The air conditioner according to claim 6, characterized in that, Along the surface extension direction of the second air guide section, the flow guiding area of ​​the guide hole decreases as the distance between the second air guide section and the evaporator increases.

8. The air conditioner according to claim 7, characterized in that, The second air guide section has a first guide hole and a second guide hole with different guide areas, wherein the guide area of ​​the first guide hole is larger than the guide area of ​​the second guide hole; The distance between the first guide hole and the evaporator is less than the distance between the second guide hole and the evaporator.

9. The air conditioner according to claim 7, characterized in that, The diameter of the guide hole gradually increases in the direction in which the distance between the evaporator and the second air guide section gradually increases.

10. The air conditioner according to any one of claims 1-9, characterized in that, The centrifugal fan includes an impeller and a centrifugal motor. The centrifugal motor is located on the side of the impeller away from the evaporator. The output end of the centrifugal motor is connected to the impeller. The centrifugal motor is used to drive the impeller to rotate so that the gas after heat exchange in the evaporator is blown into the air inlet duct.

11. The air conditioner according to any one of claims 1-9, characterized in that, The housing is further provided with a first partition, which divides the housing into a first receiving cavity located above and a second receiving cavity located below. The evaporator and the centrifugal fan are located in the first receiving cavity, and the condenser is located in the second receiving cavity.

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