Cabinet air conditioner based on simple centrifugal air duct

Abstract

The invention discloses a cabinet air conditioner based on a simple centrifugal air duct, which comprises a cabinet air conditioner shell, the centrifugal air duct arranged in the cabinet air conditioner shell and a centrifugal fan arranged in the centrifugal air duct, the centrifugal fan is a volute-free centrifugal fan, and the position of a minimum gap between the inner side wall of the centrifugal air duct and the centrifugal fan is limited as a point A; a connecting line between the point A and a fan rotating shaft of the centrifugal fan is arranged in the horizontal direction and is positioned in the width direction of the cabinet machine shell; compared with the prior art, the centrifugal fan is designed to be a volute-free centrifugal fan, some supporting pieces in the centrifugal fan are removed, and simplicity of the centrifugal air duct is embodied; and the connecting line between the point A and the fan rotating shaft of the centrifugal fan is limited to be arranged in the horizontal direction and located in the width direction of the cabinet machine shell, so that the diameter of a wind wheel of the centrifugal fan can be designed to be maximum under the condition that the width of the cabinet machine shell is not changed, and the fan efficiency and the noise effect are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to an air conditioning cabinet based on a simple centrifugal air duct. Background Art

[0002] There are cabinet units using centrifugal air ducts on the market, in which a centrifugal fan with a volute is arranged. When the upper and lower air ducts of this cabinet are discharged simultaneously, the minimum gap between the centrifugal fan and the inner wall of the air duct must be at the volute tongue. In order to meet the working requirements of the centrifugal air duct, the diameter of the centrifugal fan needs to be designed to be relatively small. However, the smaller the diameter of the centrifugal fan is designed, the worse the fan efficiency and noise effect of the centrifugal fan will be; therefore, how to design the diameter of the centrifugal fan to be larger is a question worth considering. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an air conditioning cabinet based on a simple centrifugal air duct, so as to solve the problem in the prior art that how to design the diameter of the centrifugal fan to be larger is a problem worth considering.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an air-conditioning cabinet based on a simple centrifugal air duct, comprising a cabinet casing, a centrifugal air duct arranged in the cabinet casing, and a centrifugal fan arranged in the centrifugal air duct, the centrifugal fan being a centrifugal fan without a volute and the minimum gap between the inner wall of the centrifugal air duct and the centrifugal fan being point A, the line between point A and the fan shaft of the centrifugal fan being arranged in the horizontal direction and located in the width direction of the cabinet casing.

[0005] Compared with the prior art, the present invention has the following beneficial effects:

[0006] The centrifugal fan of this air-conditioning cabinet is designed as a centrifugal fan without a volute, and some supporting parts in the centrifugal fan are removed, which reflects the simplicity of the centrifugal air duct; and the line between point A and the fan shaft of the centrifugal fan is arranged in the horizontal direction and is located in the width direction of the cabinet casing, so that the wind wheel diameter of the centrifugal fan can be designed to be maximum when the width of the cabinet casing remains unchanged, which is beneficial to improving the fan efficiency and noise effect; at the same time, during the operation of the centrifugal fan, the pressure attenuation generated on the wind wheel of the centrifugal fan is relatively low, so as to further ensure the air volume and operating efficiency of the centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0008] Figure 2 for Figure 1 The local structure of Figure 1 ;

[0009] Figure 3 for Figure 1 Schematic diagram of the internal structure;

[0010] Figure 4 for Figure 3 A partial enlarged view of part B in the middle;

[0011] Figure 5 for Figure 3 Schematic diagram of the local structure;

[0012] Figure 6 for Figure 1 A partial cross-sectional view of the interior;

[0013] Figure 7 for Figure 6 A partial enlarged view of the middle C part;

[0014] Figure 8 for Figure 6 Schematic diagram of the partial structure of the centrifugal fan;

[0015] Fig. 9 for Figure 1 The local structure of Figure 2 ;

[0016] Fig.10 for Fig. 9 Schematic diagram of the splitting;

[0017] Fig.11 for Figure 1 A top view of

[0018] Fig.12 for Figure 1 Rear view of

[0019] Fig.13 for Fig.11 It is the cross-sectional view of line DD;

[0020] Fig.14 for Fig.12 It is a cross-sectional view along line EE.

[0021] The reference numerals in the drawings of the specification include: cabinet housing 1, centrifugal air duct 2, centrifugal fan 3, upper air outlet 4, upper side air outlet 5, lower air outlet 6, lower side air outlet 7, main airflow part 8, main airflow block 81, upper air guide part 9, upper flow channel guide plate 91, upper inclined plate 911, upper trapezoidal plate 912, upper plate 913, upper arc plate 914, upper cross flow guide plate 92, longitudinal guide plate 93, cross guide plate 94, lower air guide part 10, lower flow channel guide plate 101, lower inclined plate 1011, lower ... shaped plate 1012, lower plate 1013, lower arc plate 1014, lower cross flow guide plate 102, conical guide block 103, air duct plate 9a, wind wheel 31, impeller 32, air inlet guide ring 11, diffusion structure 12, upper diffuser 121, lower diffuser 122, air guide plane 1211, stabilizing cavity 13, stabilizing air inlet 14, stabilizing air outlet 15, motor 33, connecting part 16, connecting plate 161, positioning column 162, positioning hole 163, mounting plate 17, evaporator 18. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below through specific embodiments:

[0023] like Figure 1 , Figure 3 as well as Figure 4 As shown, an embodiment of the present invention proposes an air-conditioning cabinet based on a simple centrifugal air duct 2, comprising a cabinet casing 1, a centrifugal air duct 2 arranged in the cabinet casing 1, and a centrifugal fan 3 arranged in the centrifugal air duct 2, wherein the centrifugal fan 3 is a centrifugal fan 3 without a volute and the minimum gap between the inner wall of the centrifugal air duct 2 and the centrifugal fan 3 is defined as point A, and the connecting line between point A and the fan shaft of the centrifugal fan 3 is arranged in the horizontal direction and is located in the width direction of the cabinet casing 1.

[0024] The air-conditioning cabinet designs the centrifugal fan 3 as a centrifugal fan 3 without a volute, removes some supporting parts in the centrifugal fan 3, and reflects the simplicity of the centrifugal air duct 2; and the line between point A and the fan shaft of the centrifugal fan 3 is arranged in the horizontal direction and is located in the width direction of the cabinet casing 1, so that it can ensure that the diameter of the wind wheel 31 of the centrifugal fan 3 is designed to be maximum when the width of the cabinet casing 1 remains unchanged, which is beneficial to improving the fan efficiency and noise effect; at the same time, during the operation of the centrifugal fan 3, the pressure attenuation generated on the wind wheel 31 of the centrifugal fan 3 is relatively low, so as to further ensure the air volume and operation efficiency of the centrifugal fan 3.

[0025] In this embodiment, when the left inner wall of the centrifugal air duct 2 and the right inner wall of the centrifugal air duct 2 are symmetrically arranged with the centrifugal fan 3 as the center, there is a point A on the left inner wall of the centrifugal air duct 2 and the right inner wall of the centrifugal air duct 2, and at this time there are two points A; when the left inner wall of the centrifugal air duct 2 and the right inner wall of the centrifugal air duct 2 are not symmetrically arranged with the centrifugal fan 3 as the center, there is a point A on one of the left inner wall of the centrifugal air duct 2 and the right inner wall of the centrifugal air duct 2, and at this time there is one point A.

[0026] In order to efficiently guide the air drawn in by the centrifugal fan 3 into the centrifugal air duct 2, and then discharge it from the air outlet of the air conditioner cabinet. Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, according to another embodiment of the present invention, an air-conditioning cabinet based on a simple centrifugal air duct 2 is provided with a guide component, and the centrifugal air duct 2 has an upper air outlet chamber, a middle air inlet and outlet chamber and a lower air outlet chamber in sequence along the vertical direction, and the upper air outlet chamber is connected with an upper air outlet 4 and an upper side air outlet 5; the guide component includes a main air flow portion 8, an upper air guide portion 9 and a lower air guide portion 10, the main air flow portion 8 is arranged in the middle air inlet and outlet chamber and is used to guide the incoming air to the upper air outlet chamber and the lower air outlet chamber; the upper air guide portion 9 is arranged in the upper air outlet chamber and is used to guide the wind entering the upper air outlet chamber to the upper air outlet 4 and the upper side air outlet 5; the lower air guide portion 10 is arranged in the lower air outlet chamber and is used to guide the wind entering the lower air outlet chamber to the lower air outlet 6 and the lower side air outlet 7.

[0027] In this embodiment, the upper air outlet 4 is arranged at the front top of the cabinet casing 1, there are two upper air outlets 5 and they are distributed on both sides of the upper part of the cabinet casing 1, the lower air outlet 6 is arranged at the front bottom of the cabinet casing 1, and there are two lower air outlets 7 and they are distributed on both sides of the lower part of the cabinet casing 1.

[0028] The present air guide assembly mainly comprises a main air guide portion 8, an upper air guide portion 9 and a lower air guide portion 10, which are arranged correspondingly in the upper air outlet cavity, the middle air inlet and outlet cavity and the lower air outlet cavity to guide the incoming air to the upper air outlet cavity and the lower air outlet cavity, and then quickly and efficiently guide the incoming air to the upper air outlet 4, the upper side air outlet 5, the lower air outlet 6 and the lower side air outlet 7 for discharge.

[0029] like Figure 3 As shown, according to another embodiment of the present invention, an air conditioning cabinet based on a simple centrifugal air duct 2, wherein the main air flow portion 8 includes four main air flow blocks 81, and the four main air flow blocks 81 are arranged circumferentially on the inner edge of the middle inlet and outlet air cavity.

[0030] In this embodiment, a centrifugal fan 3 is installed in the middle of the middle inlet and outlet air cavity, and four main air flow blocks 81 are arranged on the outside of the centrifugal fan 3. The line passing through the fan shaft and arranged horizontally is specifically defined as the center line of the shaft. The four main air flow blocks 81 include two upper main air flow blocks 81 located above the center line of the shaft and distributed on opposite sides of the centrifugal fan 3, and two lower main air flow blocks 81 located below the center line of the shaft and distributed on opposite sides of the centrifugal fan 3. Each upper main air flow block 81 and each lower main air flow block 81 are arc-shaped surfaces facing the side of the centrifugal fan 3, and their thickness along the direction of the center line of the shaft gradually increases from one end close to the centrifugal fan 3 to the other end.

[0031] The air thrown out from the air duct of the centrifugal fan 3 is efficiently introduced into the upper air outlet cavity through the cooperation of the two upper main air guide blocks 81; at the same time, the air is efficiently introduced into the lower air outlet cavity through the cooperation of the two lower main air guide blocks 81.

[0032] In order to reasonably arrange the installation position of the main airflow block 81 to achieve the best air flow, the radius of the centrifugal fan 3 is limited to R, and the distance between each upper main airflow block 81 and each lower main airflow block 81 and the center line of the rotating shaft is 1 / 6R. Through simulation experiments, it is concluded that the upper main airflow block 81 and the lower main airflow block 81 are arranged in the above manner, and the air flow is optimal.

[0033] like Figure 3 and Figure 5 As shown, according to another embodiment of the present invention, an air-conditioning cabinet based on a simple centrifugal air duct 2, wherein the upper air guide portion 9 includes an upper flow duct guide plate 91 and an upper cross-flow guide plate 92, the upper flow duct guide plate 91 is arranged on the inner back of the upper air outlet cavity and one end of which is connected to the middle flow duct guide plate arranged on the back of the middle inlet and outlet cavity, and the other end thereof extends to the upper air outlet 4 to form an inner lining of the upper air outlet 4; the upper cross-flow guide plates 92 have two and are connected one-to-one on both sides of the upper flow duct guide plate 91, and one end of the two upper cross-flow guide plates 92 extends to form an inner lining corresponding to the upper air outlet 5.

[0034] The upper flow channel guide plate 91 is used to guide part of the wind introduced into the upper air outlet cavity to the upper air outlet 4 for discharge, and the two upper cross-flow guide plates 92 are used to guide part of the wind introduced into the upper air outlet cavity to the two upper side air outlets 5; wherein, the upper flow channel guide plate 91 specifically includes an upper inclined plate 911, an upper trapezoidal plate 912, an upper plate 913 and an upper arc plate 914 connected in sequence, the upper inclined plate 911 is connected to the middle flow channel guide plate and one end of the upper arc plate 914 extends to the upper air outlet 4 to form an inner lining of the upper air outlet 4; this is conducive to accelerating the speed of wind flowing to the upper air outlet 4 for discharge.

[0035] Based on the above scheme:

[0036] The upper guide portion 9 also includes a longitudinal guide plate 93 and a transverse guide plate 94. There are two longitudinal guide plates 93 and they are arranged in an inverted "eight" shape on the front side of the upper flow guide plate 91; the transverse guide plates 94 are arranged in a row on the front side of each upper transverse flow guide plate 92, and a row of transverse guide plates 94 includes a plurality of transverse guide plates 94 arranged at intervals in the vertical direction.

[0037] In this embodiment, the two longitudinal guide plates 93 are arranged so that the wind introduced into the upper air outlet cavity is evenly distributed to the upper air outlet 4 and the two upper air outlets 5, and the distribution of multiple transverse guide plates 94 on the upper transverse flow guide plate 92 allows the wind to be evenly blown out along the length direction of the upper air outlet 5; wherein each of the transverse guide plates 94 is in the shape of a tile.

[0038] Since the centrifugal fan 3 installed in the middle of the middle air inlet and outlet cavity throws out the wind, the wind entering the upper air outlet cavity tends to flow to one side thereof, and one of the ends of the two longitudinal guide plates 93 facing the middle air inlet and outlet cavity is extended toward the middle air inlet and outlet cavity to make its length greater than the other, which is conducive to the wind entering the upper air outlet cavity being more evenly distributed in the three channels separated by the two longitudinal guide plates 93, and the wind distributed at the upper air outlet 4 and the two upper side air outlets 5 is relatively uniform. Specifically, when the centrifugal fan 3 installed in the middle of the air inlet and outlet cavity tends to throw out the wind to the left, the left end of the two longitudinal guide plates 93 facing the middle air inlet and outlet cavity is extended toward the middle air inlet and outlet cavity to make its length greater than the right end.

[0039] like Figure 3 and Figure 5 As shown, according to another embodiment of the present invention, an air-conditioning cabinet based on a simple centrifugal air duct 2, wherein the lower air guide part 10 includes a lower flow duct guide plate 101 and a lower cross flow guide plate 102, the lower flow duct guide plate 101 is arranged on the inner back of the lower air outlet cavity and one end of it is connected to the middle flow duct guide plate arranged on the back of the middle inlet and outlet cavity, and the other end extends to the lower air outlet 6 to form an inner lining of the lower air outlet 6; the lower cross flow guide plates 102 have two and are connected one-to-one on both sides of the lower flow duct guide plate 101, and one end of the two lower cross flow guide plates 102 extends to form an inner lining corresponding to the lower air outlet 7.

[0040] The wind introduced into the lower air outlet cavity is partially guided to the lower air outlet 6 for discharge through the lower flow channel guide plate 101, and the wind introduced into the lower air outlet cavity is partially guided to the two lower side air outlets 7 through the two lower cross flow guide plates 102; here, the lower flow channel guide plate 101 includes a lower inclined plate 1011, a lower trapezoidal plate 1012, a lower plate 1013 and a lower arc plate 1014 connected in sequence, the lower inclined plate 1011 is connected to the middle flow channel guide plate and one end of the lower arc plate 1014 extends to the lower air outlet 6 to form an inner lining of the lower air outlet 6; it is beneficial to speed up the speed of wind flowing to the lower air outlet 6 for discharge.

[0041] The lower guide portion 10 further includes a conical guide block 103, which is disposed in the middle of the front side of the lower flow channel guide plate 101 and includes a semi-cylindrical body in the upper section and a triangular prism in the lower section. The structural design of the conical guide block 103 allows the wind entering the lower air outlet cavity to be discharged more evenly from the lower air outlet 6 and the two lower side air outlets 7.

[0042] like Figure 2 , Figure 3 as well as Figure 5 As shown, according to another embodiment of the present invention, an air-conditioning cabinet based on a simple centrifugal air duct 2, wherein the ratio of the length of the upper air outlet cavity along the vertical direction to the length of the lower air outlet cavity along the vertical direction is not less than 2, and the relative length between the upper air outlet 5 and the lower air outlet 7 is designed according to demand to meet usage requirements.

[0043] like Figure 1 , Figure 6 as well as Figure 7 As shown, according to another embodiment of the present invention, an air conditioning cabinet based on a simple centrifugal air duct 2, wherein the cabinet casing 1 is provided with an air duct plate 9a located on the rear side of the centrifugal air duct 2, and the air duct plate 9a is integrally formed with an air inlet guide ring 11 which is cooperatively arranged on the air inlet side of the centrifugal fan 3.

[0044] The air inlet guide ring 11 is integrally formed with the air duct plate 9a. After the air duct plate 9a is installed during the assembly process, the installation of the air inlet guide ring 11 is completed, making the installation more convenient. The air inlet guide ring 11 and the air duct plate 9a are integrally formed and can be processed and formed using one mold, reducing the processing cost.

[0045] It should be noted that the air duct plate 9a is a structure formed by integrally processing an upper flow duct guide plate 91, an upper cross-flow guide plate 92, a middle flow duct guide plate, a lower flow duct guide plate 101 and a lower cross-flow guide plate 102.

[0046] like Figure 6 , Figure 7 as well as Figure 8 As shown, according to another embodiment of the present invention, an air conditioning cabinet based on a simple centrifugal air duct 2, wherein the centrifugal fan 3 includes a wind wheel 31, and an air inlet guide ring 11 is cooperatively arranged on the outside of the wind wheel 31, and the inner ring edge and the outer ring edge of the wind wheel 31 are smoothly transitioned without forming a flange structure.

[0047] With such a design, for the centrifugal fan 3, when the centrifugal fan 3 is in operation, the inner side of the wind wheel 31 has a larger guiding area around the inner side of the wind wheel 31 facing the air introduced into the wind wheel 31, which is beneficial to the guidance of the air.

[0048] Based on the above scheme:

[0049] A plurality of impellers 32 are circumferentially arranged on the inner side of the wind wheel 31, and the outer edges of the impellers 32 extend on the wind wheel 31 to the edge of the wind wheel 31. Here, this design of the impellers 32 enables the impellers 32 to have a larger length in the radial direction of the wind wheel 31, so that the suction force generated when the centrifugal fan 3 is running is greater, and more air can be sucked in.

[0050] In order to further enhance the ability of air to diffuse into the centrifugal air duct 2 after being discharged from the centrifugal fan 3, as shown in FIG. Figure 6 and Figure 7 As shown, according to another embodiment of the present invention, an air conditioning cabinet based on a simple centrifugal air duct 2, wherein the wind wheel 31 has a tendency to gradually increase from its air inlet end to its air outlet end, and a diffusion structure 12 that cooperates with the air outlet end of the wind wheel 31 is formed at the junction of the air duct plate 9a and the air inlet guide ring 11.

[0051] In this embodiment, the wind wheel 31 is composed of a plurality of annular panels connected in sequence from the air inlet end to the air outlet end, and the inner diameter of some annular panels located in the middle may be smaller than the inner diameters of the two annular panels connected thereto, but overall, the diameter of the wind wheel 31 air outlet port is larger than the diameter of its air inlet port, and the wind wheel 31 is similar to a trumpet shape; it is conducive to drawing air into the wind wheel 31 and diffusing it around, and then diffusing the air into the centrifugal air duct 2 through the diffusion structure 12. The longitudinal section of the annular panel may be arc-shaped or linear.

[0052] Here, the shape of the inner side surface of the air inlet guide ring 11 is adapted to the shape of the outer side surface of the wind wheel 31 .

[0053] Based on the above scheme:

[0054] The diffusion structure 12 includes an upper diffusion portion 121 distributed on the upper side of the centrifugal fan 3 and directed toward the upper side of the centrifugal air duct 2, and a lower diffusion portion 122 distributed on the lower side of the centrifugal fan 3 and directed toward the lower side of the centrifugal air duct 2. The upper diffusion portion 121 and the lower diffusion portion 122 both include a plurality of wind guide planes 1211 that are sequentially connected to the air outlet end of the wind wheel 31 and are arranged obliquely. The slopes of the plurality of wind guide planes 1211 gradually decrease starting from the one connected to the air outlet end of the wind wheel 31.

[0055] When the centrifugal fan 3 is running, air is drawn into the wind wheel 31 and diffused around, and the upper diffuser 121 guides the air to the upper side of the centrifugal air duct 2 for diffusion, and the lower diffuser 122 guides the air to the lower side of the centrifugal air duct 2 for diffusion, which is beneficial to improve the efficiency of air flowing in the centrifugal air duct 2. Among them, the above diffuser 121 is used as an example, and the upper diffuser 121 includes two wind guide planes 1211 that are sequentially connected to the wind outlet end of the wind wheel 31 and arranged obliquely. The slope of one wind guide plane 1211 connected to the wind outlet end of the wind wheel 31 is 45 degrees, and the slope of the other wind guide plane 1211 is 30 degrees. This design is beneficial to improve the efficiency of air flowing in the centrifugal air duct 2.

[0056] During the operation of the centrifugal fan 3, in order to improve the stability of the wind wheel 31 during the rotation process, Figure 7 As shown, according to another embodiment of the present invention, an air conditioning cabinet based on a simple centrifugal air duct 2, wherein a stabilizing cavity 13 covering the outside of the wind wheel 31 is formed between the air inlet guide ring 11 and the wind wheel 31, and the stabilizing cavity 13 has a stabilizing air inlet 14 connected to the air outlet end of the wind wheel 31 and a stabilizing air outlet 15 connected to the air inlet end of the wind wheel 31.

[0057] In this embodiment, the air inlet end of the wind wheel 31 does not contact the air inlet guide ring 11 to form the stable air outlet 15, and the air outlet end of the wind wheel 31 does not contact the air inlet guide ring 11 to form the stable air inlet 14. The stable air inlet 14 and the stable air outlet 15 are both annular, and the stable cavity 13 is an annular cavity located outside the wind wheel 31. When the centrifugal fan 3 is running, since a suction force is formed from the air inlet end to the air outlet end of the wind wheel 31, a suction force is also formed at the stable air outlet 15. Part of the air flowing to the air outlet end of the wind wheel 31 is drawn into the stabilizing cavity 13 from the stabilizing air inlet 14, and then drawn out from the stabilizing air outlet 15 to the air inlet end of the wind wheel 31. Then this part of the air flows from the air inlet end of the wind wheel 31 to its air outlet end, thereby forming a flowing and stable annular stabilizing air layer on the outside of the wind wheel 31, and forming a pressure blocking effect in the stabilizing cavity 13, thereby ensuring that the wind wheel 31 can rotate stably without the risk of touching the air inlet guide ring 11 when the air inlet area of ​​the centrifugal fan 3 is increased.

[0058] like Figure 1 , Fig. 9 as well as Fig.10As shown, according to another embodiment of the present invention, an air-conditioning cabinet based on a simple centrifugal air duct 2, wherein the air inlet end of the centrifugal fan 3 is installed in the middle of the air duct plate 9a formed on the rear side of the centrifugal air duct 2 and the end of the centrifugal fan 3 away from its air inlet end has a motor 33, and the motor 33 is installed in the middle of the mounting plate 17 formed on the front side of the centrifugal air duct 2 through the connecting part 16, and a plurality of positioning columns 162 are formed on the side of the mounting plate 17 away from the air duct plate 9a; the connecting part 16 includes a connecting plate 161, the connecting plate 161 is attached to the side of the mounting plate 17 away from the air duct plate 9a and is connected to the motor 33 through a plurality of locking members, and a plurality of positioning holes 163 are opened on the connecting plate 161 for a plurality of positioning columns 162 to pass through one by one.

[0059] In this embodiment, the locking member can be a locking screw, and the number of the locking screw, the positioning hole 163 and the positioning column 162 are all four, and the positioning holes 163 are distributed at the four corners of the connecting plate 161; the air conditioning cabinet mainly includes a centrifugal fan 3 without a volute, and some supporting parts in the centrifugal fan 3 are removed, which reflects the simplicity of the centrifugal air duct 2; the air duct plate 9a is used to limit the installation of the air inlet end of the centrifugal fan 3, and at the same time, the motor 33 on the other end of the centrifugal fan 3 is first positioned during installation through the cooperation of multiple positioning columns 162 and multiple positioning holes 163, and the connecting plate 161 is attached to the mounting plate 17 to have a larger contact area, and then connected between the motor 33 and the connecting plate 161 through multiple locking screws, ensuring the stable installation of the centrifugal fan 3 and the relatively simple installation structure design of the centrifugal fan 3, and the relatively low processing cost.

[0060] The centrifugal fan 3 is a backward centrifugal fan 3, and the backward centrifugal fan 3 is applied here mainly to utilize its comprehensive consideration of efficiency, energy consumption and noise to perform relatively well and be able to meet the use requirements.

[0061] According to another embodiment of the present invention, in an air conditioning cabinet based on a simple centrifugal air duct 2, the fan shaft of the centrifugal fan 3 is arranged obliquely during installation and the end close to the air inlet of the centrifugal fan 3 is the high end.

[0062] The centrifugal fan 3 is arranged in this way during installation because the fan shaft is corrected to the horizontal direction under the weight of the centrifugal fan 3, ensuring that the centrifugal fan 3 has a small jump during rotation, and ensuring the stability and reliability of the centrifugal fan 3 during rotation. Specifically, in this embodiment, the angle between the fan shaft and the horizontal plane during installation is 0° to 5°, ensuring that it can be corrected to the horizontal direction after installation.

[0063] like Figure 1 , Fig.11 as well as Fig.13As shown, according to another embodiment of the present invention, an air-conditioning cabinet based on a simple centrifugal air duct 2, wherein the cabinet casing 1 is provided with an evaporator 18 located on the air inlet side of a backward centrifugal fan 3, the radius of the backward centrifugal fan 3 is limited to R and the height of the evaporator 18 is limited to H, and the distance between the fan shaft and the bottom of the evaporator 18 is 1 / 2H±1 / 2R. For example, the distance between the fan shaft and the bottom of the evaporator 18 can be specifically 1 / 2H-1 / 2R, 1 / 2H or 1 / 2H+1 / 2R, etc.

[0064] In this embodiment, the installation height limit of the centrifugal fan 3 is to ensure that the upper air outlet 4 of the air conditioning cabinet is larger than the lower air outlet 6, so that the ratio of the air volume of the upper air outlet 4 and the air volume of the lower air outlet 6 of the air conditioning cabinet is relatively more reasonable.

[0065] Furthermore, the width of the centrifugal air duct 2 along the horizontal direction and passing through the fan shaft is defined as W. fd , limiting the width of the cabinet housing 1 to W, W fd No less than 0.85 W, R no less than 0.4 W. According to simulation experiments, this limitation can enable the air conditioner cabinet to obtain a larger air volume.

[0066] like Figure 1 , Fig.12 as well as Fig.14 As shown, according to another embodiment of the present invention, an air conditioning cabinet based on a simple centrifugal air duct 2, wherein the cross-section of the evaporator 18 is arc-shaped and the plane where the end face of the centrifugal fan 3 facing the evaporator 18 is located does not intersect with the evaporator 18.

[0067] In the present embodiment, this limitation is to ensure that the fan is outside the evaporator 18 , so that the diameter size design of the centrifugal fan 3 is not affected by the evaporator 18 .

[0068] In order to rationally utilize the space enclosed inside the evaporator 18, outside air is drawn in from the two air inlets on the rear side of the cabinet casing 1, and then rapidly transmitted to the centrifugal fan 3 after heat exchange in the evaporator 18, so as to improve the air outlet efficiency of the air-conditioning cabinet; an axial flow fan can be arranged in the space enclosed by the evaporator 18, and the air outlet of the axial flow fan is arranged toward the air inlet of the centrifugal fan 3; specifically, the axial flow fan is used to accelerate the flow of air between the evaporator 18 and the centrifugal fan 3.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An air conditioning cabinet based on a simple centrifugal air duct, comprising a cabinet casing, a centrifugal air duct arranged in the cabinet casing, and a centrifugal fan arranged in the centrifugal air duct, characterized in that: The centrifugal fan is a centrifugal fan without a volute and the minimum gap between the inner wall of the centrifugal air duct and the centrifugal fan is defined as point A. The line between point A and the fan shaft of the centrifugal fan is arranged in the horizontal direction and is located in the width direction of the cabinet casing.

2. The air conditioning cabinet based on a simple centrifugal air duct according to claim 1, characterized in that: There are one or two A points.

3. The air conditioning cabinet based on a simple centrifugal air duct according to claim 1, characterized in that: The centrifugal air duct is provided with a guide assembly, which includes a central inlet and outlet air cavity located in the middle thereof. The guide assembly includes four main flow blocks arranged in the central inlet and outlet air cavity and circumferentially distributed on the outside of the centrifugal fan. The four main flow blocks cooperate to guide the wind discharged from the centrifugal fan to the top and bottom of the centrifugal fan in the centrifugal air duct.

4. The air conditioning cabinet based on a simple centrifugal air duct according to claim 3, characterized in that: A line passing through the fan shaft and arranged horizontally is defined as the center line of the shaft. The four main airflow blocks include two upper main airflow blocks located above the center line of the shaft and distributed on opposite sides of the centrifugal fan, and two lower main airflow blocks located below the center line of the shaft and distributed on opposite sides of the centrifugal fan. Each upper main airflow block and each lower main airflow block has an arc-shaped surface facing the side of the centrifugal fan, and their thickness along the direction of the center line of the shaft gradually increases from one end close to the centrifugal fan to the other end.

5. The air conditioning cabinet based on the simple centrifugal air duct according to claim 4, characterized in that: The radius of the centrifugal fan is defined as R, and the distance between each of the upper main airflow blocks and each of the lower main airflow blocks and the center line of the rotating shaft is 1 / 6R.

6. The air conditioning cabinet based on a simple centrifugal air duct according to claim 3, characterized in that: The centrifugal air duct also includes an upper air outlet cavity located above the middle air inlet and outlet cavity and a lower air outlet cavity located below the middle air inlet and outlet cavity along the vertical direction, an upper air outlet and an upper side air outlet, and the lower air outlet cavity is connected to a lower air outlet and a lower side air outlet; The flow guide assembly also includes: An upper air guide portion, the upper air guide portion is arranged in the upper air outlet cavity and is used to guide the wind entering the upper air outlet cavity to the upper air outlet and the upper side air outlet; The lower air guide portion is arranged in the lower air outlet cavity and is used to guide the wind entering the lower air outlet cavity into the lower air outlet and the lower side air outlet.

7. The air conditioning cabinet based on a simple centrifugal air duct according to claim 6, characterized in that: The upper guide portion comprises: An upper flow channel guide plate, which is arranged on the inner back of the upper air outlet cavity and one end of which is connected to the middle flow channel guide plate arranged on the back of the middle air inlet and outlet cavity, and the other end of which extends to the upper air outlet to form an inner lining of the upper air outlet; An upper cross-flow guide plate, wherein two upper cross-flow guide plates are connected one by one to both sides of the upper flow channel guide plate, and one end of the two upper cross-flow guide plates extends to form an inner lining corresponding to the upper air outlet; There are two longitudinal guide plates, which are arranged in an inverted "eight" shape on the front side of the upper flow channel guide plate; A cross flow guide plate is provided in a row on the front side of each upper cross flow guide plate, and a row of cross flow guide plates includes a plurality of cross flow guide plates arranged at intervals along the vertical direction.

8. The air conditioning cabinet based on the simple centrifugal air duct according to claim 7, characterized in that: The upper flow channel guide plate includes an upper inclined plate, an upper trapezoidal plate, an upper plate and an upper arc plate which are connected in sequence. The upper inclined plate is connected to the middle flow channel guide plate and one end of the upper arc plate extends to the upper air outlet to form an inner lining of the upper air outlet.

9. The flow guide component based on the simple centrifugal air duct according to claim 7, characterized in that: One of the ends of the two longitudinal guide plates facing the middle air inlet and outlet cavity is extended toward the middle air inlet and outlet cavity so that its length is greater than that of the other one.

10. The flow guide component based on the simple centrifugal air duct according to claim 6, characterized in that: The lower guide portion comprises: A lower flow channel guide plate, which is arranged on the inner back of the lower air outlet cavity and one end of which is connected to the middle flow channel guide plate arranged on the back of the middle air inlet and outlet cavity, and the other end of which extends to the lower air outlet to form an inner lining of the lower air outlet; A lower cross flow guide plate, wherein there are two lower cross flow guide plates connected one by one to both sides of the lower flow channel guide plate, and one end of the two lower cross flow guide plates extends to form an inner lining corresponding to the lower air outlet; A conical guide block is arranged in the middle of the front side of the lower flow channel guide plate and comprises a semi-cylinder in the upper section and a triangular prism in the lower section.

11. The flow guide component based on a simple centrifugal air duct according to claim 6, characterized in that: The ratio of the length of the upper air outlet cavity along the vertical direction to the length of the lower air outlet cavity along the vertical direction is not less than 2.

12. The air conditioning cabinet based on a simple centrifugal air duct according to claim 1, characterized in that: An air duct plate located at the rear side of the centrifugal air duct is arranged in the cabinet casing, and the air duct plate is integrally formed with an air inlet guide ring arranged in coordination with the air inlet side of the centrifugal fan.

13. The air conditioning cabinet based on the simple centrifugal air duct according to claim 12, characterized in that: The centrifugal fan comprises a wind wheel, an air inlet guide ring is arranged on the outside of the wind wheel, and the inner ring edge and the outer ring edge of the wind wheel are smoothly transitioned without forming a flange structure.

14. The air conditioning cabinet based on a simple centrifugal air duct according to claim 13, characterized in that: A plurality of impellers are circumferentially arranged on the inner side surface of the wind wheel, and outer edges of the impellers extend on the wind wheel to the edge of the wind wheel.

15. The air conditioning cabinet based on a simple centrifugal air duct according to claim 13, characterized in that: The wind wheel has a tendency to gradually increase from its air inlet end to its air outlet end, and a diffusion structure that matches the wind wheel air outlet end is formed at the connection between the air duct plate and the air inlet guide ring.

16. The air conditioning cabinet based on a simple centrifugal air duct according to claim 15, characterized in that: The diffusion structure includes an upper diffusion portion distributed on the upper side of the centrifugal fan and directed toward the upper side of the centrifugal air duct, and a lower diffusion portion distributed on the lower side of the centrifugal fan and directed toward the lower side of the centrifugal air duct. The upper diffusion portion and the lower diffusion portion both include a plurality of wind guide planes which are sequentially connected to the wind wheel outlet end and arranged obliquely, and the slopes of the plurality of wind guide planes gradually decrease starting from the one connected to the wind wheel outlet end.

17. The air conditioning cabinet based on a simple centrifugal air duct according to claim 13, characterized in that: A stable cavity covering the outside of the wind wheel is formed between the air inlet guide ring and the wind wheel, and the stable cavity has a stable air inlet connected to the wind outlet end of the wind wheel and a stable air outlet connected to the wind inlet end of the wind wheel.

18. The air conditioning cabinet based on a simple centrifugal air duct according to claim 1, characterized in that: The centrifugal fan is a backward centrifugal fan.

19. The air conditioning cabinet based on a simple centrifugal air duct according to claim 18, characterized in that: The fan shaft of the centrifugal fan is arranged tilted during installation, and the end close to the air inlet of the centrifugal fan is the high end.

20. The air conditioning cabinet based on a simple centrifugal air duct according to claim 19, characterized in that: The angle between the fan shaft and the horizontal plane during installation is 0° to 5°.

21. The air conditioning cabinet based on a simple centrifugal air duct according to claim 18, characterized in that: An evaporator is arranged in the cabinet casing on the air inlet side of the backward centrifugal fan. The radius of the backward centrifugal fan is limited to R and the height of the evaporator is limited to H. The distance between the fan shaft and the bottom of the evaporator is 1 / 2H±1 / 2R.

22. The air conditioning cabinet based on a simple centrifugal air duct according to claim 21, characterized in that: The cross section of the evaporator is arc-shaped, and the plane where the end surface of the centrifugal fan facing the evaporator is located does not intersect the evaporator.

23. The air conditioning cabinet based on a simple centrifugal air duct according to claim 21, characterized in that: The width of the centrifugal air duct along the horizontal direction and passing through the fan shaft is defined as W. fd , limit the cabinet housing width to W, W fd Not less than 0.85W, R not less than 0.4W.

Images