Cabinet air conditioner with fresh air function

Abstract

The application provides a cabinet type air conditioner with a fresh air function, comprising a casing and a fresh air module, a first fresh air inlet is formed at the lower end of the rear side of the casing, and the first fresh air inlet and the air outlet are oppositely arranged in the front-rear direction of the casing; a main air duct is formed in the interior of the casing and is in communication with the air outlet, and the main air duct extends in the up-down direction of the casing as a whole; the fresh air module is arranged in the interior of the casing and has 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 at the rear side of the main air duct, and the fan duct section is located at 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 both extend in the front-rear direction of the casing; the second fresh air inlet, the air inlet duct section, the fan duct section and the fresh air outlet are sequentially arranged and in communication; the fresh air flow path is shortened, the fresh air conveying resistance is reduced, energy loss is avoided, and the fresh air conveying efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and in particular relates to a cabinet air conditioner with a fresh air function. Background Technology

[0002] As users increasingly pursue a healthier quality of life, the functional scope of modern air conditioners has significantly expanded, no longer limited to simple cooling and heating. Currently, indoor air quality is a major concern, leading to the emergence of air conditioners equipped with high-efficiency fresh air systems, which have become market favorites. These air conditioners not only continuously supply fresh air to the room, effectively diluting the concentration of potentially harmful gases, but also improve indoor air circulation, creating a more comfortable and healthy breathing environment, comprehensively protecting users' respiratory health.

[0003] However, in the design of 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 brings many drawbacks. Because the fan and filter are closely connected, the installation space required for the entire fresh air module is relatively large. In situations with limited indoor space, the placement of the cabinet air conditioner is 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 miniaturization of the entire unit, increasing production costs and transportation difficulties, and also does not meet the current consumer aesthetic and space utilization needs for home appliances with a focus on simple and compact design. 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 of the large installation space required for the fresh air module in existing cabinet air conditioners, which greatly restricts the placement of cabinet air conditioners and is not conducive to the miniaturization of cabinet air conditioners.

[0005] This invention provides a cabinet air conditioner with a fresh air function, comprising:

[0006] The casing has an air outlet at the lower front end of its casing wall; a main air duct is formed inside the casing, and the main air duct extends vertically along the casing, with the air outlet end of the main air duct connected to the air outlet; a first fresh air inlet is formed at the lower rear end of the casing wall, and the first fresh air inlet and the air outlet are arranged opposite to each other in the front-rear direction of the casing.

[0007] A fresh air module is disposed inside the housing. The fresh air module has a second fresh air inlet, a fresh air outlet, and a fresh air duct. The second fresh air inlet and the first fresh air inlet are correspondingly disposed and connected. The fresh air outlet and the air outlet are correspondingly disposed and connected.

[0008] The fresh air duct includes an air inlet section and a fan section; the air inlet section is located behind the main air duct, and the fan section is located on the left, right, or bottom of the main air duct, and both the air inlet section and the fan section extend along the front-rear direction of the casing; the second fresh air inlet, the air inlet section, the fan section, and the fresh air outlet are arranged sequentially and connected.

[0009] Further optionally, the fresh air module also includes a filter and a fresh air fan; the filter is disposed within the air inlet duct section and is located close to the second fresh air inlet; the fresh air fan is disposed within the fan duct section.

[0010] The air inlet direction of the filter screen and the air outlet direction of the fresh air fan are not in the same direction.

[0011] Further optionally, the filter surface of the filter screen is parallel to the air inlet surface of the second fresh air inlet, or the filter surface of the filter screen is inclined relative to the air inlet surface of the second fresh air inlet.

[0012] Alternatively, the filter screen can be slidably installed in the air inlet duct section along the left-right direction of the housing.

[0013] 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 inclined relative to the horizontal plane;

[0014] When the fan duct section is located to the left or right 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 inclined relative to the extension direction of the fan duct section.

[0015] Optionally, the fresh air module further includes a fresh air inlet duct, one end of which passes through the first fresh air inlet and is connected to the second fresh air inlet, and the other end of which is connected to the outside.

[0016] Further optionally, the fresh air fan includes a fresh air housing and fresh air impellers; 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, the fresh air cavity inlet connecting the fan duct section and the fresh air cavity; a fresh air cavity outlet is formed on the side of the fresh air housing near the fresh air outlet, the fresh air cavity outlet connecting the fresh air outlet and the fresh air cavity; the fresh air impellers are rotatably disposed within the fresh air cavity;

[0017] The fresh air housing has a guide ring formed at the inlet of the fresh air cavity, and the guide ring is arranged around the inlet of the fresh air cavity.

[0018] Further optionally, the air inlet duct section includes an air inlet main sidewall located near the main air duct, one end of the air inlet main sidewall abutting the far edge of the second fresh air inlet, and the other end of the air inlet main sidewall abutting the guide ring;

[0019] The profile of the main air inlet sidewall is an arc-shaped structure;

[0020] The far edge is the edge of the second fresh air inlet that is far from the fresh air fan.

[0021] Further optionally, the profile of the main air inlet sidewall satisfies the following: the larger the derivative of the air inlet end of the profile, the smaller the flow rate of fresh air in the air inlet duct section; as the derivative of the air inlet end of the profile gradually increases, the flow rate of fresh air in the air inlet duct section gradually decreases and the magnitude of the decrease gradually increases.

[0022] The air inlet end of the profile is the end of the profile that is closer to the second fresh air inlet.

[0023] Further optionally, the profile of the main air inlet sidewall satisfies the following in a two-dimensional rectangular coordinate system:

[0024] , 0≤x≤a;

[0025] Wherein, the two-dimensional rectangular coordinate system is a rectangular coordinate system established on a horizontal plane with the point where the main air inlet sidewall and the guide ring abut 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 and the origin in the direction parallel to the X-axis; a is the maximum distance between the point on the profile and the origin in the direction parallel to the X-axis; y is the distance between the point on the profile and the origin in the direction parallel to the Y-axis.

[0026] Further optionally, the distance from the origin to the axis of the fresh air fan is r, and the maximum distance between a point on the profile and the origin in a direction parallel to the Y-axis is h; wherein r, a, and h satisfy:

[0027] 80mm≤r≤90mm, 200mm≤a≤210mm, 170mm≤h≤180mm.

[0028] Compared with the prior art, the main advantages of the present invention are as follows:

[0029] (1) The fresh air outlet and the air outlet are directly connected. Under the action of the fresh air fan, outdoor air enters the air intake duct section through the module fresh air inlet, and then is discharged through the fan duct section, fresh air outlet and air outlet. This shortens the fresh air flow path, reduces the fresh air delivery resistance, avoids energy loss, improves the fresh air delivery efficiency, and solves the problem that the long fresh air flow path and high fresh air delivery resistance in the existing technology cannot meet the fresh air demand.

[0030] (2) Utilize the unused space on the left, right or bottom of the main air duct to arrange the fresh air duct. Design the fresh air duct to extend from the second fresh air inlet to the left, right or bottom of the main air duct, and then to the fresh air outlet. Avoid conflict with the main air duct, realize efficient use of the internal space of the casing, facilitate the miniaturization of the whole machine, and solve the problem of unreasonable design of the extension direction of the fresh air duct in the existing technology, which leads to an increase in the size of the whole machine or congestion of the internal air duct.

[0031] (3) The filter screen is placed close to the second fresh air inlet and the fresh air fan is placed close to the fresh air outlet. This changes the traditional way of arranging the filter screen and the fresh air fan adjacent to each other, making the layout of the filter screen and the fresh air fan in the casing more dispersed and reasonable, thereby effectively reducing the overall installation space required for the fresh air module and reducing the indoor installation space requirements of the cabinet air conditioner.

[0032] (4) As the fresh air module occupies less space, the placement of cabinet air conditioners indoors is no longer restricted, and they can better adapt to diverse home layouts. Whether it is a living room, bedroom or other different rooms, or a narrow corner or special space, cabinet air conditioners can be arranged more flexibly, which improves the convenience of users.

[0033] (5) The optimized fresh air module design reduces the space occupied by the air conditioner, creating conditions for the miniaturization of the whole unit. It conforms to the development trend of simple and compact home appliances, which not only helps to reduce production costs, but also saves space and reduces transportation costs during transportation, while also meeting consumers' needs for saving home space. Attached Figure Description

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0036] Figure 1a This is a partial cross-sectional structural schematic diagram of an embodiment of the indoor unit provided by the present invention;

[0037] Figure 1b This is a partial isometric structural diagram of an indoor unit embodiment provided by the present invention;

[0038] Figure 1c This is a top view of an embodiment of the indoor unit provided by the present invention;

[0039] Figure 2 This is a schematic diagram of the isometric structure of an embodiment of the fresh air module provided by the present invention;

[0040] Figure 3a , Figure 3b and Figure 3c This is a partial cross-sectional structural schematic diagram of an embodiment of the fresh air module provided by the present invention;

[0041] Figure 4a A schematic diagram of an embodiment of the fresh air module (with the filter surface of the filter screen parallel to the vertical plane where the second fresh air inlet is located) provided by the present invention;

[0042] Figure 4b A schematic diagram of an embodiment of the fresh air module (the filter surface of the filter screen is inclined relative to the vertical plane where the second fresh air inlet is located) provided by the present invention;

[0043] Figure 5 Schematic diagrams of the three profile embodiments provided by the present invention;

[0044] Figure 6a A top view of an embodiment of the indoor unit (with the fan duct section located on the left side of the main duct) provided by the present invention;

[0045] Figure 6b A top view of an embodiment of the indoor unit (with the fan duct section located on the right side of the main duct) provided by the present invention;

[0046] In the picture:

[0047] 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;

[0048] 2-Fresh air module; 21-Second fresh air inlet; 22-Fresh air outlet; 23-Fresh air duct; 231-Inlet air duct section; 232-Inlet main side wall; 233-Fan air duct section; 241-Filter screen; 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 fan blade; 257-Drive motor; 26-Fresh air inlet pipe. Detailed Implementation

[0049] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0051] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0052] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0053] In existing cabinet air conditioners with fresh air function, the fan and filter in the fresh air module are usually arranged next to each other. This makes the installation space required for the entire fresh air module relatively large. In cases where indoor space is limited, the placement of cabinet air conditioners is greatly restricted. Moreover, the large size of the fresh air module is not conducive to the development of the whole unit towards miniaturization, which does not meet the current consumer aesthetic and space utilization needs of home appliances that are simple and compact.

[0054] This invention creatively provides a cabinet air conditioner with a fresh air function, including a casing and a fresh air module. An air outlet is formed at the lower front end of the casing wall, and a first fresh air inlet is formed at the lower rear end of the casing wall. A main air duct communicating with the air outlet is formed inside the casing, extending vertically along the casing. The fresh air module is located inside the casing and has a second fresh air inlet, a fresh air outlet, and a fresh air duct. The first fresh air inlet, second fresh air inlet, fresh air duct, fresh air outlet, and air outlet are sequentially connected. The fresh air duct includes an air intake section and a fan section, with the air intake section located behind the main air duct and the fan section located to the left, right, or bottom of the main air duct.

[0055] The fresh air outlet and the air outlet are directly connected, shortening the fresh air flow path and reducing the resistance to fresh air delivery; the fresh air duct is laid out using the unused space on the left, right or bottom of the main air duct, realizing efficient use of the internal space of the casing; it effectively reduces the overall installation space required for the fresh air module, creating conditions for the miniaturization design of the whole unit.

[0056] Example 1

[0057] 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, which includes:

[0058] The casing 11 has an air outlet 116 formed at the lower front end of its casing wall and a first fresh air inlet 115 formed at the lower rear end of its casing wall. 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 main air duct 12 is formed inside the casing 11. The main air duct 12 extends in the vertical direction of the casing 11. The air outlet 116 connects the air outlet end of the main air duct 12 to the room (that is, the air outlet 116 is connected to the room, and the end of the main air duct 12 near the air outlet 116 is connected to the air outlet 116).

[0059] The fresh air module 2 is located 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 arranged and connected, and the fresh air outlet 22 and the air outlet 116 are correspondingly arranged and connected.

[0060] The fresh air duct 23 includes an air inlet section 231 and a fan section 233. The air inlet section 231 is located behind the main air duct 12, and the fan section 233 is located on the left, right or bottom of the main air duct 12. Both the air inlet section 231 and the fan section 233 extend along the front and rear direction of the casing 11. The second fresh air inlet 21, the air inlet section 231, the fan section 233 and the fresh air outlet 22 are arranged in sequence and connected.

[0061] The fresh air module 2 also has a filter 241 and a fresh air fan 25, which are separately installed on the fresh air duct 23. The filter 241 is installed in the air inlet duct section 231 and is located close to the second fresh air inlet 21. The fresh air fan 25 is installed 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.

[0062] This design has the following technical effects:

[0063] First, the fresh air outlet 22 and the air outlet 116 are directly connected, which shortens the fresh air flow path, reduces the resistance to fresh air delivery, avoids energy loss, and improves the efficiency of fresh air delivery.

[0064] Second, make full use of the space on the left, right or bottom of the main air duct 12 to set up the fresh air duct 23, reduce the space occupied by the fresh air module 2, and facilitate the miniaturization of the whole unit;

[0065] Third, the filter 241 and the fresh air fan 25 are set separately, with the filter 241 located near the second fresh air inlet 21 and the fresh air fan 25 located near the fresh air outlet 22, further reducing the overall installation space required for the fresh air module 2; thereby reducing the installation space requirements of the indoor unit of the cabinet air conditioner, making the indoor unit adaptable to different installation environments, which is conducive to the miniaturization of the indoor unit of the cabinet air conditioner; and significantly improving the utilization rate of the internal space of the casing 11.

[0066] Specifically, 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 wall, and an air outlet grille 16 is provided at the air outlet 116; 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 form a circumference; one end of the main air duct 12 and the air outlet 114 are connected to the rear side wall 113 and the rear side wall 114. Air outlet 116 is connected; the shell wall also forms an air inlet, which connects the indoor unit and the interior of the casing 11; the indoor unit also includes a main fan and an indoor heat exchanger, the main fan is located inside the casing 11, and the main fan includes a main casing and a main fan blade; the main casing forms 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 installed in the main air cavity; the indoor heat exchanger is located inside the casing 11 and in the flow path between the air inlet and the main air cavity inlet;

[0067] When the main fan blades are controlled to rotate, indoor air enters the interior of the casing 11 through the air inlet, then flows through the indoor heat exchanger, and after exchanging heat 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 then discharged into the room through the air outlet 116.

[0068] The indoor unit also includes an exhaust duct 14 and an electrical box 15. The exhaust duct 14 connects the indoor and outdoor areas and can exhaust indoor air to the outside. The electrical box 15 is located inside the housing 11 and at the upper left side of the main air duct 12.

[0069] 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 screen 241, the filter screen 241 can filter out the impurities; the filter screen 241 is a high-efficiency particulate air (HEPA) filter.

[0070] The speed of the main fan and the fresh air fan 25 can be adjusted according to actual needs to ensure 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 the preset range and meets the requirements of indoor temperature and humidity, so as to avoid the problem of large changes in indoor temperature and humidity caused by fresh air, which would reduce the indoor air comfort.

[0071] Preferably, the main fan is a centrifugal fan, and the axis of the main fan is parallel to the horizontal plane; the main air chamber inlet is formed at one or both ends of the main casing along the axial direction, and the main air chamber outlet is formed at the bottom of the main casing.

[0072] like Figure 1a , Figure 6a and Figure 6b As shown, the fan duct section 233 is located on the left, right or bottom of the main air duct 12, and the fresh air fan 25 is installed in the fan duct section 233; the fresh air duct 23 does not damage the structure of the main air duct 12, and enables the indoor unit to achieve the fresh air function with minimal changes to the structure of the indoor unit.

[0073] The air inlet duct section 231 extends from the second fresh air inlet 21 to the fan duct section 233; the filter screen 241 is installed in the air inlet duct section 231, and the filter screen 241 fully filters the outdoor fresh air flowing through the air inlet duct section 231 to improve the quality of the fresh air entering the room.

[0074] When the fresh air fan 25 is running, the outdoor fresh air flows sequentially through the second fresh air inlet 21, the air inlet duct section 231, the fan duct section 233 and the fresh air outlet 22, 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 relatively short, which reduces the loss of fresh air volume and improves the fresh air delivery efficiency.

[0075] The following explains how to set up filter 241, such as... Figure 4a As shown, the filter surface of filter 241 is parallel to the air inlet surface of the second fresh air inlet 21, so that all the fresh air entering the air inlet duct section 231 can flow through filter 241, and filter 241 can filter the fresh air comprehensively and thoroughly; wherein, the air inlet surface is the vertical surface where the second fresh air inlet 21 is located.

[0076] Furthermore, the filter screen 241 can be pushed and pulled along the left and right directions of the housing 11 and installed in the air inlet duct section 231, which facilitates the disassembly, assembly and cleaning of the filter screen 241; different filter screens of different filtration levels can be replaced in a timely manner according to actual needs, and different filter screens of different filtration levels have different filtration precision.

[0077] The filter screen 241 and the air inlet duct section 231 are slidably fitted together, and the sliding direction is parallel to the left and right direction of the casing 11.

[0078] In addition, an installation space is formed within the air intake duct section 231 and near the second fresh air inlet 21. The fresh air module 2 also includes functional components, which are detachably installed within the installation space. There are multiple functional components, and the functions of each component include at least one of filtration, dehumidification, fragrance enhancement, odor removal, humidification, and heating. According to actual needs, the corresponding functional components can be installed within the installation space. When fresh air flows through the functional components, the components process the fresh air and improve its quality. Specifically, a functional component may have one or more functions.

[0079] 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 set perpendicular to the horizontal plane or 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 to install 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 filter surface of the filter screen 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%.

[0080] 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 inclined relative to the extension direction of the fan duct section 233; making full use of the space on the left or right side of the main air duct 12 to install the fresh air fan 25 reduces the space required to install the fresh air fan 25 and further reduces 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.

[0081] The structure required for outdoor fresh air to enter the fresh air duct 23 is further explained 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, outdoor fresh air enters the 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.

[0082] Furthermore, the fresh air intake duct 26 is a retractable duct, which can be used in different installation environments; the end of the fresh air intake duct 26 that connects to the outside is lower than the end of the fresh air intake duct 26 that connects to the second fresh air inlet 21, to prevent rainwater from flowing back into the fresh air duct 23;

[0083] A baffle is provided at the second fresh air inlet 21. The baffle can be controlled to open or close the second fresh air inlet 21, or to adjust the opening degree of the second fresh air inlet 21 when it is open.

[0084] 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 a fresh air fan 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. The fresh air cavity inlet 253 connects the ventilation fan duct section 233 and the fresh air cavity 252. A fresh air cavity outlet 254 is formed on the side of the fresh air housing 251 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 fan blade 256 is rotatably installed inside the fresh air cavity 252.

[0085] When the fresh air fan blade 256 is controlled to rotate, outdoor fresh air enters the air intake duct section 231 through the fresh air intake pipe 26 and the second fresh air inlet 21, and then enters the fan duct section 233; then it enters the fresh air cavity 252 through the fresh air cavity inlet 253, and 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;

[0086] The fresh air housing 251 has a guide ring 255 formed at the fresh air cavity inlet 253. The guide ring 255 is arranged around the fresh air cavity inlet 253 to guide the fresh air in the fan duct section 233 to the fresh air cavity inlet 253, so that the fresh air can quickly enter the fresh air cavity 252.

[0087] Preferably, the fresh air fan 25 is a centrifugal fan; the fresh air fan blade 256 is a centrifugal fan blade with a diameter of 173mm and an axial height of 40mm.

[0088] Furthermore, the cabinet air conditioner also includes a base 13, and the casing 11 is mounted on the base 13; when the fan duct section 233 is located at the bottom of the main air duct 12, the fresh air fan 25 also includes a drive motor 257, which is mounted on the base 13 and located below the fresh air duct 23. The drive motor 257 is fixed to the base 13 with 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.

[0089] The output shaft of the drive motor 257 is connected to the fresh air fan blade 256. When the drive motor 257 is running, the fresh air fan blade 256 rotates, and then the outdoor fresh air flows through the fresh air inlet pipe 26 and the fresh air duct 23 in sequence and enters the room through the air outlet 116.

[0090] 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 sidewall 232 located near the main air duct 12. One end of the air inlet main sidewall 232 abuts the far edge of the second fresh air inlet 21, and the other end of the air inlet main sidewall 232 abuts the guide ring 255.

[0091] The profile of the main air inlet sidewall 232 is an arc-shaped structure; the main air inlet sidewall 232 plays a certain guiding role for the fresh air in the air inlet duct section 231, so that the fresh air can quickly enter the fan duct section 233;

[0092] The far edge is the edge of the second fresh air inlet 21 that is far from the fresh air fan 25.

[0093] Furthermore, the profile of the main air inlet sidewall 232 satisfies the following: the larger the derivative of the air inlet end of the profile, the smaller the fresh air flow rate in the air inlet duct section 231; as the derivative of the air inlet end of the profile gradually increases, the fresh air flow rate in the air inlet duct section 231 gradually decreases and the magnitude of the decrease gradually increases; optimizing the structure of the profile of the main air inlet sidewall 232 ensures the fresh air intake volume, reduces the impact of fresh air on indoor environmental comfort, and reduces the noise of the fresh air fan 25 during operation.

[0094] Among them, the air inlet end of the profile is the end of the profile that is close to the second fresh air inlet 21; the derivative of the air inlet end of the profile is the first derivative of the profile at the air inlet end, which represents the rate of change of the slope of the profile.

[0095] Specifically, such as Figures 3b to 3c As shown, based on CFD simulation, the structural dimensions of the profile are determined. While meeting the airflow requirements of the main air duct 12 and the fresh air duct 23, the airflow of the main air duct 12 is maximized to ensure its air delivery performance. The profile of the main inlet sidewall 232 satisfies the following in a two-dimensional Cartesian coordinate system:

[0096] , 0≤x≤a;

[0097] The two-dimensional rectangular coordinate system is a rectangular coordinate system established on a horizontal plane with the point where the main air inlet sidewall 232 and the guide ring 255 meet as the origin, and the X-axis and Y-axis as the 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 the point on the profile line and the origin in the direction parallel to the X-axis, a is the maximum distance between the point on the profile line and the origin in the direction parallel to the X-axis, and y is the distance between the point on the profile line and the origin in the direction parallel to the Y-axis.

[0098] It balances the air volume of the main air duct 12 and the air volume of the fresh air duct 23, reduces the noise of the fresh air fan 25 during operation, and improves the comfort of the indoor environment.

[0099] Furthermore, 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 a direction parallel to the Y-axis is h; r, a, and h satisfy:

[0100] 80mm≤r≤90mm, 200mm≤a≤210mm, 170mm≤h≤180mm;

[0101] Preferably, r=86.5mm, a=206.2mm, and h=172.8mm.

[0102] As shown in Table 1, this embodiment compares the impact of the profiles of the three structures on the airflow of the main air duct 12 and the fresh air duct 23. The profiles of the three structures are as follows: Figure 5As shown; among them, the air inlet of the first type of profile descends the most gently, the air inlet of the third type of profile descends the most steeply, and the air inlet of the second type of profile descends in the middle.

[0103] Table 1. Impact of different air profiles on main air volume and fresh air volume

[0104]

[0105] Considering overall 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 for the main air inlet side wall 232 is better.

[0106] In summary, by fully utilizing the space on the left, right, or bottom of the main air duct 12 to set up the fresh air duct 23, the internal space of the casing 11 is increased, the filter 241 and the fresh air fan 25 are set up separately, the space required for installing the fresh air module 2 is reduced, the internal structure of the indoor unit is made more compact, and the overall size of the indoor unit is further reduced, solving the problems of large installation space requirements and difficulty in miniaturization of traditional fresh air modules; by optimizing the shape and size of the main air inlet side wall 232, the air volume of the fresh air duct 23 and the air volume of the main air duct 12 are taken into account, ensuring the comfort of the indoor environment.

[0107] Example 2

[0108] Unlike Example 1, as Figure 4b As shown, the filter surface of the filter screen 241 is inclined relative to the air inlet surface of the second fresh air inlet 21, and is inclined from the second fresh air inlet 21 toward the side closer to the fresh air fan 25.

[0109] Table 2. Effect of filter tilt angle on fresh air volume

[0110]

[0111] Without changing the overall height of the filter 241, tilting the filter 241 can reduce its vertical projection height, further reducing the overall height of the unit. As shown in Table 2, through simulation analysis, even when the tilt angle of the filter 241 is at its limit (30°), compared to Example 1 where the filter surface of the filter 241 is parallel to the air inlet surface of the second fresh air inlet 21 (the tilt angle of the filter 241 is 0°), the fresh air intake volume is reduced by only about 3 m³ / h, but the vertical projection height of the filter 241 is reduced by 13%.

[0112] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A cabinet-type air conditioner with a fresh air function, characterized in that, include: The casing (11) has an air outlet (116) formed 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) extends 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 disposed inside the housing (11). The fresh air module (2) has a second fresh air inlet (21), a fresh air outlet (22), a fresh air duct (23), and a fresh air fan (25). 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 section (231) and a fan section (233); the air inlet section (231) is located on the rear side of the main air duct (12), and the fan section (233) is located on the left, right or bottom side of the main air duct (12), and both the air inlet section (231) and the fan section (233) extend along the front and rear direction of the casing (11); the second fresh air inlet (21), the air inlet section (231), the fan section (233) and the fresh air outlet (22) are arranged in sequence and connected. The fresh air fan (25) is disposed in the fan duct section (233), and the fresh air fan (25) includes a fresh air housing (251); a fresh air cavity (252) is formed inside the fresh air housing (251), and a fresh air cavity inlet (253) is formed at one axial end of the fresh air cavity (252) by the fresh air housing (251), and a guide ring (255) is formed at the fresh air cavity inlet (253) by the fresh air housing (251); The air inlet duct section (231) includes an air inlet main sidewall (232) located near the main air duct (12). One end of the air inlet main sidewall (232) abuts the far edge of the second fresh air inlet (21), and the other end of the air inlet main sidewall (232) abuts the guide ring (255). The far edge is the edge of the second fresh air inlet (21) away from the fresh air fan (25).

2. The cabinet air conditioner with fresh air function according to claim 1, characterized in that, The fresh air module (2) also has a filter (241); the filter (241) is disposed in the air inlet duct section (231) and the filter (241) is disposed close to the second fresh air inlet (21); 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.

3. The cabinet air conditioner with fresh air function according to claim 2, characterized in that, The filter surface of the filter (241) is parallel to the air inlet surface of the second fresh air inlet (21), or the filter 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 screen (241) can be pushed and pulled along the left and right directions of the housing (11) and installed in the air inlet duct section (231).

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 to the left or right 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) also includes a fresh air inlet pipe (26), one end of which passes through the first fresh air inlet (115) and is connected to the second fresh air inlet (21), and the other end of which is connected to the outside.

7. The cabinet air conditioner with fresh air function according to claim 2, characterized in that, The fresh air inlet (253) connects the fan duct section (233) and the fresh air cavity (252), and the guide ring (255) is arranged around the fresh air inlet (253); the fresh air housing (251) has a fresh air cavity outlet (254) on the side near the fresh air outlet (22), and the fresh air cavity outlet (254) connects the fresh air outlet (22) and the fresh air cavity (252); The fresh air fan (25) also includes a fresh air fan blade (256), which is rotatably disposed within the fresh air cavity (252).

8. The cabinet air conditioner with fresh air function according to claim 7, characterized in that, The profile of the main air inlet sidewall (232) is an arc-shaped structure.

9. The cabinet air conditioner with fresh air function according to claim 8, characterized in that, The profile of the main air inlet sidewall (232) satisfies the following: the larger 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); as 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 magnitude of the decrease gradually increases. The air inlet end of the profile is the end of the profile that is 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 main air inlet sidewall (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 the point at the junction of the main air inlet sidewall (232) and the guide ring (255) as the origin, and the X-axis and Y-axis as the 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 the point on the profile and the origin in the direction parallel to the X-axis; a is the maximum distance between the point on the profile and the origin in the direction parallel to the X-axis; and y is the distance between the point on the profile and the origin in the 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 fan (25) is r, and the maximum distance between a 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.

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