Cabinet type air conditioner with fresh air function

Abstract

The cabinet type air conditioner with the fresh air function comprises a machine shell and a fresh air module, an air outlet is formed in the lower end of the front side of the machine shell, a first fresh air inlet is formed in the lower end of the rear side of the machine shell, and the first fresh air inlet and the air outlet are oppositely arranged in the front-back direction of the machine shell; a main air duct communicating with the air outlet is formed in the machine shell, and the main air duct integrally extends in the vertical direction of the machine shell; the fresh air module is arranged in the machine shell and provided with a second fresh air inlet, a fresh air outlet and a fresh air duct. The fresh air duct comprises an air inlet duct section and a fan duct section; the air inlet duct section is located on the rear side of the main air duct, the fan duct section is located on the left side or the right side or the bottom of the main air duct, and the air inlet duct section and the fan duct section extend in the front-back direction of the machine shell. The second fresh air inlet, the air inlet duct section, the fan duct section and the fresh air outlet are arranged in sequence and communicate with one another; a fresh air flow path is shortened, fresh air conveying resistance is reduced, energy loss is avoided, and fresh air conveying efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a cabinet air conditioner with a fresh air function. Background Art

[0002] As users' pursuit of a healthier lifestyle continues to rise, the functional scope of modern air conditioners has significantly expanded beyond simple cooling and heating. Indoor air quality has become a major concern, and air conditioners equipped with efficient fresh air systems have emerged as a new favorite in the market. These air conditioners not only continuously deliver fresh air to indoor spaces, effectively diluting potential harmful gas concentrations, but also improve indoor air flow, creating a more comfortable and healthy breathing environment and comprehensively protecting users' respiratory health.

[0003] However, in traditional cabinet air conditioners, the fresh air module generally adopts an integrated design with the fan and filter arranged adjacent to each other. While this design achieves the fresh air function to a certain extent, it also brings many disadvantages. Because the fan and filter are closely connected, the installation space required for the entire fresh air module is relatively large. In the case of limited indoor space, the placement options of the cabinet air conditioner are greatly restricted, making it difficult to flexibly adapt to various home layouts. Moreover, the large size of the fresh air module is not conducive to the development of miniaturization of the entire unit, increasing production costs and transportation difficulties. It also does not meet the current consumer aesthetic and space utilization requirements for simple and compact home appliances. Summary of the Invention

[0004] In view of this, the present invention provides a cabinet air conditioner with a fresh air function to solve the problems that the installation space required for the fresh air module in the existing cabinet air conditioner is large, which greatly limits the placement of the cabinet air conditioner and is not conducive to the miniaturization of the cabinet air conditioner.

[0005] The present invention provides a cabinet air conditioner with a fresh air function, comprising: The casing has an air outlet formed at a front lower end of a casing wall; a main air duct is formed inside the casing, the main air duct extends as a whole in the vertical direction of the casing, and the air outlet end of the main air duct is connected to the air outlet; a first fresh air inlet is formed at a rear lower end of the casing wall, and the first fresh air inlet and the air outlet are arranged opposite to each other in the front-to-back direction of the casing; A fresh air module is provided inside the housing, the fresh air module having a second fresh air inlet, a fresh air outlet, and a fresh air duct; wherein the second fresh air inlet is correspondingly provided and connected to the first fresh air inlet, and the fresh air outlet is correspondingly provided and connected to the air outlet; The fresh air duct includes an air inlet duct section and a fan duct section; the air inlet duct section is located on the rear side of the main air duct, and the fan duct section is located on the left side, right side or bottom of the main air duct, and the air inlet duct section and the fan duct section both extend along the front and rear directions of the casing; the second fresh air inlet, air inlet duct section, fan duct section and fresh air outlet are arranged in sequence and connected.

[0006] Further optionally, the fresh air module further comprises a filter and a fresh air fan; the filter is arranged in the air inlet duct section, and the filter is arranged close to the second fresh air inlet; the fresh air fan is arranged in the fan duct section; The air inlet direction of the filter screen and the air outlet direction of the fresh air blower are not in the same direction.

[0007] Further optionally, the filtering surface of the filter is parallel to the air inlet surface of the second fresh air inlet, or the filtering surface of the filter is inclined relative to the air inlet surface of the second fresh air inlet.

[0008] Further optionally, the filter can be arranged in the air inlet duct section in a push-pull manner along the left-right direction of the casing.

[0009] Further optionally, when the fan duct section is located at the bottom of the main air duct, the axis of the fresh air fan is perpendicular to the horizontal plane or is inclined relative to the horizontal plane; When the fan duct section is located on the left or right side of the main air duct, the axis of the fresh air fan is parallel to the horizontal plane, and the axis of the fresh air fan is perpendicular to the extension direction of the fan duct section or is inclined relative to the extension direction of the fan duct section.

[0010] Further optionally, the fresh air module further includes a fresh air inlet duct, one end of the fresh air inlet duct passes through the first fresh air inlet and is connected to the second fresh air inlet, and the other end of the fresh air inlet duct is connected to the outdoors.

[0011] Further optionally, the fresh air fan includes a fresh air housing and a fresh air blade; a fresh air cavity is formed inside the fresh air housing, and a fresh air cavity inlet is formed at one axial end of the fresh air cavity, and the fresh air cavity inlet is connected to the fan duct section and the fresh air cavity; the fresh air housing is formed with a fresh air cavity outlet on a side close to the fresh air outlet, and the fresh air cavity outlet is connected to the fresh air outlet and the fresh air cavity; the fresh air blade is rotatably arranged in the fresh air cavity; The fresh air housing is formed with a guide ring at the fresh air cavity inlet, and the guide ring is arranged around the fresh air cavity inlet.

[0012] Further optionally, the air inlet duct section includes an air inlet main side wall arranged close to the main air duct, one end of the air inlet main side wall abuts against the distal edge of the second fresh air inlet, and the other end of the air inlet main side wall abuts against the guide ring; The profile of the air inlet main side wall is an arc structure; The distal edge is the edge of the second fresh air inlet away from the fresh air fan.

[0013] Further optionally, the profile of the air inlet main side wall satisfies: the larger the derivative of the profile at the air inlet end, the smaller the flow rate of fresh air in the air inlet duct section; as the derivative of the profile at the air inlet end gradually increases, the flow rate of fresh air in the air inlet duct section gradually decreases and the reduction amplitude gradually increases; The air inlet end of the profile is the end of the profile close to the second fresh air inlet.

[0014] Further optionally, the profile of the air inlet main side wall satisfies the following in a two-dimensional rectangular coordinate system: , 0≤x≤a; In which, the two-dimensional rectangular coordinate system is a rectangular coordinate system established on a horizontal plane with a point at the junction of the main side wall of the air inlet and the guide ring as the origin, and the X-axis and Y-axis as coordinate axes. The X-axis points from the origin to the main air duct, and the Y-axis points from the origin to the second fresh air inlet; x is the distance between the point on the profile line and the origin in a direction parallel to the X-axis, a is the maximum distance between the point on the profile line and the origin in a direction parallel to the X-axis; y is the distance between the point on the profile line and the origin in a direction parallel to the Y-axis.

[0015] Further optionally, the distance from the origin to the axis of the fresh air fan is r, and the maximum distance between the point on the profile and the origin in a direction parallel to the Y axis is h; r, a, and h satisfy: 80mm≤r≤90mm, 200mm≤a≤210mm, 170mm≤h≤180mm.

[0016] Compared with the prior art, the beneficial effects of the present invention are mainly: (1) The fresh air outlet and the air outlet are directly connected. Under the action of the fresh air fan, the outdoor air enters the air inlet duct section through the module fresh air inlet, and is then discharged through the fan duct section, the fresh air outlet and the air outlet, shortening the fresh air flow path, reducing the fresh air transmission resistance, avoiding energy loss, and improving the fresh air transmission efficiency, thus solving the problem that the fresh air flow path is long and the fresh air transmission resistance is large in the existing technology, which cannot meet the fresh air demand; (2) The idle space on the left side, right side or bottom of the main air duct is used to arrange the fresh air duct. The fresh air duct is designed to extend from the second fresh air inlet to the left side, right side or bottom of the main air duct, and then to the fresh air outlet, so as to avoid conflict with the main air duct, realize efficient use of the internal space of the casing, and be conducive to the miniaturization of the whole machine, and solve the problem in the prior art that the extension direction of the fresh air duct is unreasonable, resulting in an increase in the size of the whole machine or congestion in the internal air duct.

[0017] (3) The filter is placed close to the second fresh air inlet, and the fresh air fan is placed close to the fresh air outlet, which changes the traditional adjacent arrangement of the filter and the fresh air fan, making the layout of the filter and the fresh air fan in the casing more dispersed and reasonable, thereby effectively reducing the installation space required for the fresh air module as a whole and lowering the indoor installation space requirements of the cabinet air conditioner; (4) Since the space occupied by the fresh air module is reduced, the placement of the cabinet air conditioner in the room is no longer subject to too many restrictions, and it can better adapt to the diverse home layout. Whether it is different rooms such as the living room and bedroom, or narrow corners or special spaces, the cabinet air conditioner can be arranged more flexibly, which improves the convenience of user use; (5) The optimized fresh air module design reduces the overall space occupied by the air conditioner, creating conditions for the miniaturization of the entire machine, which is in line with the development trend of simple and compact home appliances. It not only helps to reduce production costs, but also saves space and reduces transportation costs during transportation, while also meeting consumers' demand for saving home space. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0020] Figure 1a A partial cross-sectional structural diagram of an indoor unit embodiment provided by the present invention; Figure 1b This is a partial axial structural diagram of an embodiment of an indoor unit provided by the present invention; Figure 1c A schematic diagram of a top view of the structure of an indoor unit according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the axial structure of the fresh air module embodiment provided by the present invention; Figure 3a 、 Figure 3b and Figure 3c A partial cross-sectional structural diagram of an embodiment of a fresh air module provided by the present invention; Figure 4a A schematic structural diagram of an embodiment of the fresh air module provided by the present invention (the filtering surface of the filter screen is parallel to the vertical surface where the second fresh air inlet is located); Figure 4b A schematic structural diagram of an embodiment of the fresh air module provided by the present invention (the filtering surface of the filter screen is tilted relative to the vertical plane where the second fresh air inlet is located); Figure 5 Schematic diagrams of the three types of profile embodiments provided by the present invention; Figure 6a A schematic top view of the structure of an embodiment of the indoor unit provided by the present invention (the fan duct section is located on the left side of the main duct); Figure 6b A schematic top view of the structure of an embodiment of the indoor unit provided by the present invention (the fan duct section is located on the right side of the main duct); In the picture: 11 - Casing; 111 - Front side wall; 112 - Rear side wall; 113 - Left side wall; 114 - Right side wall; 115 - First fresh air inlet; 116 - Air outlet; 12 - Main air duct; 13 - Base; 14 - Exhaust duct; 15 - Electrical box; 16 - Air outlet grille; 2-Fresh air module; 21-Second fresh air inlet; 22-Fresh air outlet; 23-Fresh air duct; 231-Inlet duct section; 232-Inlet main side wall; 233-Fan duct section; 241-Filter; 242-Bracket; 243-Handle; 25-Fresh air fan; 251-Fresh air housing; 252-Fresh air cavity; 253-Fresh air cavity inlet; 254-Fresh air cavity outlet; 255-Guide ring; 256-Fresh air blades; 257-Drive motor; 26-Fresh air inlet pipe. DETAILED DESCRIPTION

[0021] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0022] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0023] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0024] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0025] In existing cabinet air conditioners with fresh air function, the fan and filter in the fresh air module are generally arranged adjacent to each other, which requires a large installation space for the entire fresh air module. When indoor space is limited, the placement of the cabinet air conditioner is greatly restricted. Moreover, the large size of the fresh air module is not conducive to the miniaturization of the entire machine, which does not meet the current consumer's aesthetic and space utilization requirements for simple and compact design of home appliances.

[0026] The present invention creatively provides a cabinet air conditioner with a fresh air function, comprising a casing and a fresh air module, wherein an air outlet is formed at the lower end of the front side of a casing wall, and a first fresh air inlet is formed at the lower end of the rear side of the casing wall; a main air duct connected to the air outlet is formed inside the casing, and the main air duct as a whole extends in the upper and lower directions of the casing; the fresh air module is arranged inside the casing and has a second fresh air inlet, a fresh air outlet and a fresh air duct; the first fresh air inlet, the second fresh air inlet, the fresh air duct, the fresh air outlet and the air outlet are connected in sequence; the fresh air duct comprises an air inlet duct section and a fan duct section, the air inlet duct section is located at the rear side of the main air duct, and the fan duct section is located at the left side, the right side or the bottom side of the main air duct; The fresh air inlet and outlet are directly connected, shortening the fresh air flow path and reducing the resistance to fresh air delivery; the fresh air duct is arranged by utilizing the idle space on the left, right or bottom of the main air duct, realizing efficient use of the internal space of the casing; and effectively reducing the installation space required for the fresh air module as a whole, creating conditions for the miniaturized design of the entire machine.

[0027] Example 1 like Figures 1a to 3a As shown, this embodiment provides a cabinet air conditioner with a fresh air function, the cabinet air conditioner includes an indoor unit, and the indoor unit includes: The casing 11 has an air outlet 116 formed at the front lower end of its casing wall, and a first fresh air inlet 115 formed at the rear lower end of the casing wall. The first fresh air inlet 115 and the air outlet 116 are arranged opposite each other in the front-to-back direction of the casing 11. A main air duct 12 is formed inside the casing 11. The main air duct 12 extends in the vertical direction of the casing 11 as a whole. The air outlet 116 connects the outlet end of the main air duct 12 with the indoor room (i.e., the air outlet 116 is connected to the indoor room, and the end of the main air duct 12 near the air outlet 116 is connected to the air outlet 116). A fresh air module 2 is disposed inside the housing 11 and has a second fresh air inlet 21, a fresh air outlet 22, and a fresh air duct 23; wherein the second fresh air inlet 21 and the first fresh air inlet 115 are correspondingly disposed and connected, and the fresh air outlet 22 and the air outlet 116 are correspondingly disposed and connected; The fresh air duct 23 includes an air inlet duct section 231 and a fan duct section 233; the air inlet duct section 231 is located on the rear side of the main air duct 12, and the fan duct section 233 is located on the left side, right side or bottom of the main air duct 12, and the air inlet duct section 231 and the fan duct section 233 both extend along the front and rear directions of the casing 11; the second fresh air inlet 21, the air inlet duct section 231, the fan duct section 233 and the fresh air outlet 22 are arranged in sequence and connected.

[0028] The fresh air module 2 also has a filter 241 and a fresh air fan 25, and the filter 241 and the fresh air fan 25 are separately arranged on the fresh air duct 23; the filter 241 is arranged in the air inlet duct section 231, and the filter 241 is arranged close to the second fresh air inlet 21; the fresh air fan 25 is arranged in the fan duct section 233; the air inlet direction of the filter 241 and the air outlet direction of the fresh air fan 25 are not in the same direction.

[0029] Such a design has the following technical effects: First, the fresh air outlet 22 and the air outlet 116 are directly connected, which shortens the fresh air flow path, reduces the fresh air delivery resistance, avoids energy loss, and improves the fresh air delivery efficiency; Second, the space on the left, right, or bottom of the main air duct 12 is fully utilized to set the fresh air duct 23, reducing the space occupied by the fresh air module 2, which is conducive to miniaturization of the entire machine; Third, the filter 241 and the fresh air fan 25 are arranged separately, the filter 241 is arranged close to the second fresh air inlet 21, and the fresh air fan 25 is arranged close to the fresh air outlet 22, further reducing the installation space required for the fresh air module 2 as a whole; thereby reducing the installation space requirement of the indoor unit of the cabinet air conditioner, allowing the indoor unit to adapt to different installation environments, which is conducive to the miniaturization of the indoor unit of the cabinet air conditioner; and significantly improving the internal space utilization rate of the casing 11.

[0030] Specifically, the shell wall of the casing 11 includes a front side wall 111 and a rear side wall 112 arranged opposite to each other, and a left side wall 113 and a right side wall 114 arranged opposite to each other; an air outlet 116 is formed at the lower end of the front side, and an air outlet grille 16 is provided at the air outlet 116, and a first fresh air inlet 115 is formed at the lower end of the rear side wall 112; the left side wall 113 is located on the left side of the main air duct 12, and the right side wall 114 is located on the right side of the main air duct 12; the front side wall 111, the left side wall 113, the rear side wall 112 and the right side wall 114 are connected in sequence and surrounded in a circle; one end of the main air duct 12 and the outlet The air vent 116 is connected; the shell wall is also formed with an air inlet, which connects the indoor room and the interior of the casing 11; the indoor unit also includes a main fan and an indoor heat exchanger, the main fan is arranged inside the casing 11, and the main fan includes a main shell and a main fan blade; the main shell is formed with a main air cavity, a main air cavity inlet and a main air cavity outlet, the main air cavity inlet connects the interior of the casing 11 and the main air cavity, and the main air cavity outlet connects the other end of the main air duct 12 and the main air cavity; the main fan blade is rotatably arranged in the main air cavity; the indoor heat exchanger is arranged inside the casing 11 and is located in the flow path between the air inlet and the main air cavity inlet; When the main fan blades are controlled to rotate, indoor air enters the interior of the housing 11 through the air inlet, then flows through the indoor heat exchanger. After heat exchange with the indoor heat exchanger, the indoor air enters the main air cavity through the main air cavity inlet, then enters the main air duct 12 through the main air cavity outlet, and is discharged into the room through the air outlet 116. The indoor unit further includes an exhaust duct 14 and an electrical box 15. The exhaust duct 14 connects the indoor and outdoor spaces. The exhaust duct 14 can exhaust indoor air to the outside. The electrical box 15 is disposed inside the housing 11 and is located at the upper left end of the main air duct 12. The second fresh air inlet 21 is connected to the outside; when the fresh air fan 25 is running, the outdoor fresh air can enter the fresh air duct 23 through the second fresh air inlet 21, and then be discharged into the room through the fresh air outlet 22 and the air outlet 116; when the fresh air flows through the filter 241, the filter 241 can filter out impurities therein; the filter 241 is a high-efficiency filter (HEPA).

[0031] The rotation speeds of the main fan and the fresh air fan 25 can be adjusted according to actual needs so that the mixing ratio of the air discharged from the main air duct 12 and the fresh air discharged from the fresh air duct 23 is within a preset range and meets the requirements of indoor temperature and humidity, thereby avoiding the problem of large changes in indoor temperature and humidity caused by fresh air, which leads to a decrease in indoor air comfort. Preferably, the main fan is a centrifugal fan, and the axis of the main fan is parallel to the horizontal plane; a main air cavity inlet is formed at one or both axial ends of the main shell, and a main air cavity outlet is formed at the bottom of the main shell.

[0032] like Figure 1a 、 Figure 6a and Figure 6b As shown, the fan duct section 233 is located on the left side, right side, or bottom of the main air duct 12, and the fresh air fan 25 is arranged in the fan duct section 233; the fresh air duct 23 does not destroy the structure of the main air duct 12, and at the same time, the indoor unit realizes the fresh air function with minimal change to the indoor unit structure; The air inlet duct section 231 extends from the second fresh air inlet 21 to the fan duct section 233; the filter 241 is arranged in the air inlet duct section 231, and the filter 241 fully filters the outdoor fresh air flowing through the air inlet duct section 231, thereby improving the quality of the fresh air entering the room; When the fresh air fan 25 is running, the outdoor fresh air flows through the second fresh air inlet 21, the air inlet duct section 231, the fan duct section 233 and the fresh air outlet 22 in sequence, and enters the room through the air outlet 116; the overall flow direction of the fresh air is from back to front, and the flow path is short, which reduces the loss of fresh air volume and improves the fresh air delivery efficiency.

[0033] The following describes the configuration of the filter 241. Figure 4a As shown, the filtering surface of the filter 241 is parallel to the air inlet surface of the second fresh air inlet 21, so that the fresh air entering the air inlet duct section 231 can flow through the filter 241, so that the filter 241 can fully and thoroughly filter the fresh air; wherein the air inlet surface is the vertical surface where the second fresh air inlet 21 is located; Furthermore, the filter 241 can be arranged in the air inlet duct section 231 in a push-pull manner along the left and right directions of the housing 11, which facilitates the disassembly and cleaning of the filter 241; filters of different filtration levels can be replaced in a timely manner according to actual needs, and filters of different filtration levels have different filtration accuracies; The filter 241 and the air inlet duct section 231 can be slidably matched, and the sliding direction is parallel to the left-right direction of the housing 11.

[0034] In addition, an installation space is formed in the air inlet duct section 231 and near the second fresh air inlet 21. The fresh air module 2 also includes functional parts, which are detachably arranged in the installation space. The functional parts include multiple functional parts, and the functions of the multiple functional parts include at least one of filtration, dehumidification, fragrance addition, deodorization, humidification and heating; the corresponding functional parts can be set in the installation space according to actual needs, and when the fresh air flows through the functional parts, the functional parts process the fresh air to improve the quality of the fresh air; specifically, a functional part can have one function or multiple functions.

[0035] The following further explains the setting method of the fresh air fan 25. When the fan duct section 233 is located at the bottom of the main air duct 12, the axis of the fresh air fan 25 is perpendicular to the horizontal plane or is inclined relative to the horizontal plane; the space at the bottom of the main air duct 12 is fully utilized to set the fresh air fan 25, reducing the space required for installing the fresh air fan 25 and further reducing the overall size of the indoor unit; preferably, the axis of the fresh air fan 25 is set perpendicular to the horizontal plane; combined with the filtering surface of the filter 241 being parallel to the air inlet surface of the second fresh air inlet 21, the space utilization rate inside the casing 11 is increased by 40% to 60%.

[0036] When the fan duct section 233 is located on the left or right side of the main air duct 12, the axis of the fresh air fan 25 is parallel to the horizontal plane, and the axis of the fresh air fan 25 is perpendicular to the extension direction of the fan duct section 233 or is inclined relative to the extension direction of the fan duct section 233; make full use of the space on the left or right side of the main air duct 12 to set the fresh air fan 25, reduce the space required for installing the fresh air fan 25, and further reduce the overall size of the indoor unit; preferably, the axis of the fresh air fan 25 is perpendicular to the extension direction of the fan duct section 233.

[0037] The structure required for outdoor fresh air to enter the fresh air duct 23 is further described below. The fresh air module 2 also includes a fresh air inlet pipe 26. One end of the fresh air inlet pipe 26 passes through the first fresh air inlet 115 and is connected to the second fresh air inlet 21. The other end of the fresh air inlet pipe 26 is connected to the outside. In this way, the outdoor fresh air enters the air inlet duct section 231 through the fresh air inlet pipe 26 and the second fresh air inlet 21, then enters the fan duct section 233, and then enters the room through the fresh air outlet 22 and the air outlet 116. Furthermore, the fresh air inlet pipe 26 is a retractable pipe that can be adapted to different installation environments; the end of the fresh air inlet pipe 26 connected to the outside is lower than the end of the fresh air inlet pipe 26 connected to the second fresh air inlet 21, thereby preventing rainwater from flowing back into the fresh air duct 23; A baffle is provided at the second fresh air inlet 21 , and the baffle can be controlled to open or close the second fresh air inlet 21 or to adjust the opening size of the second fresh air inlet 21 when the second fresh air inlet 21 is open.

[0038] The specific structure of the fresh air fan 25 is further described below. The fresh air fan 25 includes a fresh air housing 251 and fresh air blades 256. A fresh air cavity 252 is formed inside the fresh air housing 251. The fresh air housing 251 has a fresh air cavity inlet 253 formed at one axial end of the fresh air cavity 252. The fresh air cavity inlet 253 connects the fan duct section 233 and the fresh air cavity 252. The fresh air housing 251 has a fresh air cavity outlet 254 formed on one side near the fresh air outlet 22. The fresh air cavity outlet 254 connects the fresh air outlet 22 and the fresh air cavity 252. The fresh air blades 256 are rotatably disposed in the fresh air cavity 252. When the fresh air blades 256 are controlled to rotate, the outdoor fresh air enters the air inlet duct section 231 through the fresh air inlet pipe 26 and the second fresh air inlet 21, and then enters the fan duct section 233; then enters the fresh air cavity 252 through the fresh air cavity inlet 253; the fresh air in the fresh air cavity 252 enters the room through the fresh air cavity outlet 254, the fresh air outlet 22 and the air outlet 116; The fresh air housing 251 is formed with a guide ring 255 at the fresh air cavity inlet 253. The guide ring 255 is arranged around the fresh air cavity inlet 253 and is used to guide the fresh air in the fan duct section 233 to the fresh air cavity inlet 253, so that the fresh air quickly enters the fresh air cavity 252. Preferably, the fresh air fan 25 is a centrifugal fan; the fresh air blades 256 are centrifugal blades, and the diameter of the fresh air blades 256 is 173 mm and the axial height is 40 mm.

[0039] Furthermore, the cabinet air conditioner further includes a base 13, on which the housing 11 is disposed; when the fan duct section 233 is located at the bottom of the main air duct 12, the fresh air fan 25 further includes a drive motor 257, which is disposed on the base 13 and below the fresh air duct 23. The drive motor 257 is fixed to the base 13 by screws, and a vibration damping pad is provided between the drive motor 257 and the base 13; specifically, the vibration damping pad is made of rubber material; The output shaft of the drive motor 257 is drive-connected to the fresh air blades 256. When the drive motor 257 is running, the fresh air blades 256 rotate, and then the outdoor fresh air flows through the fresh air inlet pipe 26 and the fresh air duct 23 in turn and enters the room through the air outlet 116.

[0040] The structure and dimensions of the air inlet duct section 231 are described below. The air inlet duct section 231 includes an air inlet main side wall 232 disposed near the main air duct 12. One end of the air inlet main side wall 232 abuts against the distal edge of the second fresh air inlet 21, and the other end of the air inlet main side wall 232 abuts against the guide ring 255. The profile of the air inlet main side wall 232 is an arc-shaped structure; the air inlet main side wall 232 plays a certain guiding role on the fresh air in the air inlet duct section 231, so that the fresh air quickly enters the fan duct section 233; The distal edge is the edge of the second fresh air inlet 21 away from the fresh air fan 25 .

[0041] Furthermore, the profile of the air inlet main side wall 232 satisfies the following conditions: the greater the derivative of the air inlet end of the profile, the smaller the flow rate of fresh air in the air inlet duct section 231; when the derivative of the air inlet end of the profile gradually increases, the flow rate of fresh air in the air inlet duct section 231 gradually decreases and the reduction amplitude gradually increases; the structure of the profile of the air inlet main side wall 232 is optimized to ensure the fresh air intake volume, reduce the impact of fresh air on the comfort of the indoor environment, and reduce the noise during the operation of the fresh air fan 25.

[0042] The air inlet end of the profile is the end of the profile close to the second fresh air inlet 21; the derivative of the air inlet end of the profile is the first-order derivative of the profile at the air inlet end, which represents the rate of change of the slope of the profile.

[0043] Specifically, if Figures 3b to 3c As shown, the structural dimensions of the profile are determined based on CFD simulation. While meeting the air volume requirements of the main air duct 12 and the fresh air duct 23, the air volume of the main air duct 12 is increased as much as possible, and the air transportation performance of the main air duct 12 is maximized. The profile of the air inlet main side wall 232 satisfies the following in a two-dimensional rectangular coordinate system: , 0≤x≤a; The two-dimensional rectangular coordinate system is a rectangular coordinate system established on a horizontal plane with a point at the junction of the air inlet main side wall 232 and the guide ring 255 as the origin, and with the X-axis and Y-axis as coordinate axes. The X-axis points from the origin to the main air duct 12, and the Y-axis points from the origin to the second fresh air inlet 21. x is the distance between a point on the profile and the origin in a direction parallel to the X-axis, a is the maximum distance between a point on the profile and the origin in a direction parallel to the X-axis, and y is the distance between a point on the profile and the origin in a direction parallel to the Y-axis. The air volume of the main air duct 12 and the air volume of the fresh air duct 23 are taken into consideration, the noise of the fresh air fan 25 during operation is reduced, and the comfort of the indoor environment is improved.

[0044] In addition, the distance from the origin to the axis of the fresh air fan 25 is r, and the maximum distance between a point on the profile and the origin in the direction parallel to the Y axis is h; r, a, and h satisfy: 80mm≤r≤90mm, 200mm≤a≤210mm, 170mm≤h≤180mm; Preferably, r=86.5mm, a=206.2mm, h=172.8mm.

[0045] As shown in Table 1, this embodiment compares the effects of the three types of profiles on the air volume of the main air duct 12 and the air volume of the fresh air duct 23. Figure 5As shown; among them, the air inlet end of the first type of line drops the slowest, the air inlet end of the third type of line drops the steepest, and the air inlet end of the second type of line drops in the middle; Table 1 The influence of different profiles on the main air volume and fresh air volume

[0046] Taking into consideration the comfort, the air volume of the main air duct 12 and the air volume of the fresh air duct 23, the second type of profile of the air inlet main side wall 232 is a better choice.

[0047] To sum up, by making full use of the space on the left side, right side or bottom of the main air duct 12 to set the fresh air duct 23, the space inside the casing 11 is increased, the filter 241 and the fresh air fan 25 are set separately, and the space required for installing the fresh air module 2 is reduced, making the internal structure of the indoor unit more compact, further reducing the overall size of the indoor unit, and solving the problems of large installation space requirements and difficulty in miniaturization of the traditional fresh air module; by optimizing the structure and size of the profile of the main air inlet side wall 232, the air outlet volume of the fresh air duct 23 and the air outlet volume of the main air duct 12 are taken into account to ensure the comfort of the indoor environment.

[0048] Example 2 Different from Example 1, Figure 4b As shown, the filtering surface of the filter 241 is tilted relative to the air inlet surface of the second fresh air inlet 21, and is tilted from the second fresh air inlet 21 to the side close to the fresh air blower 25; Table 2 Effect of filter tilt angle on fresh air volume

[0049] Without changing the overall height of the filter 241, the inclined setting of the filter 241 can reduce the vertical projection height of the filter 241, further reducing the height of the entire machine. As shown in Table 2, through simulation analysis, even when the inclination angle of the filter 241 is the extreme inclination angle (30°), compared with Example 1 in which the filtering surface of the filter 241 is arranged parallel to the air inlet surface of the second fresh air inlet 21 (the inclination angle of the filter 241 is 0°), the fresh air intake volume is only reduced by approximately 3 m³ / h, but the vertical projection height of the filter 241 is reduced by 13%.

[0050] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. A cabinet air conditioner with fresh air function, characterized in that: include: A casing (11) is provided with an air outlet (116) at the lower front end of its casing wall; a main air duct (12) is formed inside the casing (11), the main air duct (12) as a whole extending in the vertical direction of the casing (11), and the air outlet end of the main air duct (12) is connected to the air outlet (116); a first fresh air inlet (115) is formed at the lower rear end of the casing wall, and the first fresh air inlet (115) and the air outlet (116) are arranged opposite to each other in the front-rear direction of the casing (11); A fresh air module (2) is arranged inside the housing (11), and the fresh air module (2) has a second fresh air inlet (21), a fresh air outlet (22), and a fresh air duct (23); wherein the second fresh air inlet (21) and the first fresh air inlet (115) are correspondingly arranged and communicated with each other, and the fresh air outlet (22) and the air outlet (116) are correspondingly arranged and communicated with each other; The fresh air duct (23) comprises an air inlet duct section (231) and a fan duct section (233); the air inlet duct section (231) is located at the rear side of the main air duct (12), the fan duct section (233) is located at the left side, the right side, or the bottom of the main air duct (12), and the air inlet duct section (231) and the fan duct section (233) both extend along the front-to-back direction of the housing (11); the second fresh air inlet (21), the air inlet duct section (231), the fan duct section (233) and the fresh air outlet (22) are arranged in sequence and connected.

2. The cabinet air conditioner with fresh air function according to claim 1, characterized in that: The fresh air module (2) further comprises a filter (241) and a fresh air fan (25); the filter (241) is arranged in the air inlet duct section (231), and the filter (241) is arranged close to the second fresh air inlet (21); the fresh air fan (25) is arranged in the fan duct section (233); The air inlet direction of the filter (241) and the air outlet direction of the fresh air blower (25) are not in the same direction.

3. The cabinet air conditioner with fresh air function according to claim 2, characterized in that: The filtering surface of the filter (241) is parallel to the air inlet surface of the second fresh air inlet (21), or the filtering surface of the filter (241) is inclined relative to the air inlet surface of the second fresh air inlet (21).

4. The cabinet air conditioner with fresh air function according to claim 2, characterized in that: The filter (241) can be arranged in the air inlet duct section (231) in a push-pull manner along the left-right direction of the housing (11).

5. The cabinet air conditioner with fresh air function according to claim 2, characterized in that: When the fan duct section (233) is located at the bottom of the main air duct (12), the axis of the fresh air fan (25) is perpendicular to the horizontal plane; When the fan duct section (233) is located on the left or right side of the main air duct (12), the axis of the fresh air fan (25) is parallel to the horizontal plane, and the axis of the fresh air fan (25) is perpendicular to the extension direction of the fan duct section (233).

6. The cabinet air conditioner with fresh air function according to claim 1, characterized in that: The fresh air module (2) further comprises a fresh air inlet pipe (26), one end of the fresh air inlet pipe (26) passes through the first fresh air inlet (115) and is connected to the second fresh air inlet (21), and the other end of the fresh air inlet pipe (26) is connected to the outside.

7. The cabinet air conditioner with fresh air function according to claim 2, characterized in that: The fresh air fan (25) comprises a fresh air housing (251) and a fresh air blade (256); a fresh air cavity (252) is formed inside the fresh air housing (251); a fresh air cavity inlet (253) is formed at one axial end of the fresh air cavity (252) of the fresh air housing (251); the fresh air cavity inlet (253) is connected to the fan air duct section (233) and the fresh air cavity (252); a fresh air cavity outlet (254) is formed on a side of the fresh air housing (251) close to the fresh air outlet (22); the fresh air cavity outlet (254) is connected to the fresh air outlet (22) and the fresh air cavity (252); the fresh air blade (256) is rotatably arranged in the fresh air cavity (252); The fresh air housing (251) is formed with a guide ring (255) at the fresh air cavity inlet (253), and the guide ring (255) is arranged around the fresh air cavity inlet (253).

8. The cabinet air conditioner with fresh air function according to claim 7, characterized in that: The air inlet duct section (231) comprises an air inlet main side wall (232) arranged near the main air duct (12), one end of the air inlet main side wall (232) abuts against the distal edge of the second fresh air inlet (21), and the other end of the air inlet main side wall (232) abuts against the guide ring (255); The profile of the air inlet main side wall (232) is an arc-shaped structure; The distal edge is the edge of the second fresh air inlet (21) away from the fresh air fan (25).

9. The cabinet air conditioner with fresh air function according to claim 8, characterized in that: The profile of the air inlet main side wall (232) satisfies the following conditions: the larger the derivative of the air inlet end of the profile, the smaller the flow rate of the fresh air in the air inlet duct section (231); as the derivative of the air inlet end of the profile gradually increases, the flow rate of the fresh air in the air inlet duct section (231) gradually decreases and the reduction amplitude gradually increases; The air inlet end of the profile is the end of the profile close to the second fresh air inlet (21).

10. The cabinet air conditioner with fresh air function according to claim 8, characterized in that: The profile of the air inlet main side wall (232) satisfies the following in a two-dimensional rectangular coordinate system: ,0≤x≤a; The two-dimensional rectangular coordinate system is a rectangular coordinate system established on a horizontal plane with a point where the air inlet main side wall (232) and the guide ring (255) meet as the origin, and with the X-axis and the Y-axis as the coordinate axes, wherein the X-axis points from the origin to the main air duct (12), and the Y-axis points from the origin to the second fresh air inlet (21); x is the distance between the point on the profile and the origin in a direction parallel to the X-axis, a is the maximum distance between the point on the profile and the origin in a direction parallel to the X-axis; and y is the distance between the point on the profile and the origin in a direction parallel to the Y-axis.

11. The cabinet air conditioner with fresh air function according to claim 10, characterized in that: The distance from the origin to the axis of the fresh air blower (25) is r, and the maximum distance between the point on the profile and the origin in the direction parallel to the Y axis is h; r, a and h satisfy: 80mm≤r≤90mm, 200mm≤a≤210mm, 170mm≤h≤180mm.

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