Air mixing device and refrigeration equipment with same

Abstract

The invention provides an air mixing device and refrigeration equipment with the air mixing device, the air mixing device comprises a barrel forming an air mixing cavity and an air mixing plate set located in the air mixing cavity, the air mixing plate set comprises an air collecting plate and an air dispersing plate which are sequentially arranged at intervals, and the air collecting plate and the air dispersing plate are arranged in the direction from the air inlet side to the air outlet side of the air mixing cavity. The air gathering plate extends from the edge of the barrel to the middle in the radial direction, and the air scattering plate extends from the middle of the barrel to the edge. According to the air mixing device, air entering the air mixing cavity is fully mixed and then separated through the air mixing plate set in the air mixing cavity, the air guided out of the air outlet side of the barrel is more representative, the real condition is provided for a user, and the use experience of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a mixed air device and a refrigeration equipment having the same. Background Art

[0002] Due to the increasing diversification of items stored in the storage room of current refrigeration equipment, the smell emitted by some items is relatively small and not easily smelled by users or covered by other smells, making it difficult for users to detect, which affects the user's judgment of the freshness of the items. Some manufacturers add an odor detection device in the refrigeration equipment to detect the odor in the storage room. However, since the volume of the odor detection device is relatively small compared to the volume of the storage room, the gas entering the odor detection device is only a part of the gas in the storage room and does not represent the gas conditions at all positions in the storage room. Therefore, the detection result of the odor detection device cannot reflect the real situation in the storage room, making it impossible for users to make an effective judgment on the freshness state of the items in a timely manner, thereby affecting the user experience.

[0003] In view of this, it is necessary to design a new mixed air device and a refrigeration equipment having the same. Summary of the Invention

[0004] The present invention provides a mixed air device and a refrigeration equipment having the same to solve one of the above problems.

[0005] To achieve the above object, the technical solutions provided by the present invention are as follows:

[0006] The present invention provides a mixed air device, and the mixed air device includes:

[0007] A cylinder body, the cylinder body forms a mixed air cavity;

[0008] A mixed air plate group, located in the mixed air cavity, the mixed air plate group includes a converging air plate and a diverging air plate arranged at intervals in sequence. Among them, in the direction from the air inlet side to the air outlet side of the mixed air cavity, the converging air plate extends from the edge of the cylinder body towards the middle in the radial direction, and the diverging air plate extends from the middle of the cylinder body towards the edge.

[0009] Further, both the converging air plate and the diverging air plate are symmetrically designed with respect to the center of the cylinder body along the radial direction.

[0010] Further, the converging air plate includes a pair of inner converging air plates near the center position of the cylinder body along the radial direction. The ends of the pair of inner converging air plates near the air inlet side form a first air inlet. In the radial direction of the cylinder body, the ratio of the first air inlet to the size of the mixed air cavity is one-fourth to one-half.

[0011] Further, the mixed air plate group further includes a guiding air plate located at the end of the converging air plate near the air outlet side, and the guiding air plate extends along the axial direction of the cylinder body.

[0012] Further, the air-diffusing plate has a first section near the air inlet side and a second section near the air outlet side, and the angle between the first section and the axial direction of the cylinder body is greater than the angle between the second section and the axial direction of the cylinder body.

[0013] Further, the air-mixing plate group further includes a wind-dividing structure located between the air-collecting plate and the air-diffusing plate.

[0014] Further, the wind-dividing structure is arranged closer to the air-collecting plate than the air-diffusing plate.

[0015] Further, the wind-dividing structure is arc-shaped and protrudes in the direction of the air-collecting plate.

[0016] Further, the air-collecting plate includes a pair of inner air-collecting plates, and the air outlet ends of the pair of inner air-collecting plates form a first air outlet. In the radial direction of the cylinder body, the size of the first air outlet is not greater than the size of the wind-dividing structure.

[0017] Further, the air-mixing plate group includes a pair of air-diffusing plates corresponding up and down. The pair of air-diffusing plates form an air-diffusing area, and the air inlet ends of the pair of air-diffusing plates form a second air inlet. The air-mixing plate group further includes at least one air-guiding member located in the air-diffusing area. In the radial direction of the cylinder body, the air-guiding member is larger than the size of the second air inlet.

[0018] Further, one of the air-guiding members is located at the center of the air-diffusing area in the radial direction of the cylinder body; or a plurality of the air-guiding members are symmetrically arranged with the center of the cylinder body in the radial direction.

[0019] Further, the cylinder body includes an upper wall, a lower wall, and a pair of air-return plates respectively fixed on the upper wall and the lower wall. In the axial direction of the cylinder body, the air-return plates are located between the air-collecting plate and the air-diffusing plate. The air-return plates face the inside of the air-mixing cylinder and extend towards the air inlet side. In the axial direction of the cylinder body, the projections of the air-return plates coincide with part of the air-collecting plate and the air-diffusing plate.

[0020] Further, the air-mixing device further includes a wind-guiding structure fixed at the air outlet end of the cylinder body. The wind-guiding structure includes a pair of inner wind-guiding plates arranged up and down. The pair of inner wind-guiding plates extend obliquely towards each other from the end of the cylinder body into the air-mixing cavity, and the angle between the inner wind-guiding plates and the axial direction of the cylinder body is between 30° and 60°.

[0021] Further, the inner wind-guiding plates form a third air outlet, and the air outlet ends of the air-diffusing plates form a second air outlet. The size of the third air outlet in the radial direction of the cylinder body is smaller than the size of the second air outlet in the radial direction of the cylinder body.

[0022] Furthermore, the wind guide structure includes a pair of outer wind guide plates fixed to the side wall of the cylinder, the outer wind guide plates extend outwardly from the end of the cylinder at an angle, and the angle between the outer wind guide plates and the axial direction of the cylinder is 30° to 60°.

[0023] Furthermore, the width of the outer air guide plate is 10 mm to 12 mm.

[0024] The present invention also provides a refrigeration device, which includes the above-mentioned air mixing device.

[0025] Compared with the prior art, the beneficial effect of the present invention is that the air mixing device of the present invention utilizes an air mixing plate group to fully mix the gas entering the air mixing chamber and then separates it. The gas discharged from the air outlet side of the cylinder is more representative, providing users with real situations and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a partial structural schematic diagram of an embodiment of the refrigeration equipment of the present invention.

[0027] Figure 2 yes Figure 1 Exploded view of each component.

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of an embodiment of the air mixing device of the present invention.

[0029] Figure 4 yes Figure 3 A cross-sectional view of the central air mixing device along the axial direction of the cylinder.

[0030] Figure 5 yes Figure 4 Side view of the central air mix device.

[0031] Figure 6 yes Figure 5 Wind path diagram of the central mix air device.

[0032] Figure 7 yes Figure 5 A schematic diagram of another embodiment of the middle air guide member.

[0033] Figure 8 yes Figure 5 A schematic diagram of another embodiment of the middle air guide member.

[0034] Figure 9 yes Figure 5 A schematic diagram of another embodiment of the middle air guide member.

[0035] Figure 10 yes Figure 5 A schematic diagram of another embodiment of the middle air guide member.

[0036] Figure 11 It is Figure 2 a schematic structural view of another embodiment of the middle air duct.

[0037] Figure 12 It is Figure 2 a three-dimensional structural view of the air damper of the middle air adjustment device closing the air duct.

[0038] Figure 13 It is Figure 12 a three-dimensional structural view of the air damper of the middle air adjustment device opening the air duct.

[0039] Figure 14 It is Figure 2 a three-dimensional structural view of the air damper of another embodiment of the middle air adjustment device closing the air duct.

[0040] Figure 15 It is Figure 14 a three-dimensional structural view of the air damper of the middle air adjustment device opening the air duct.

[0041] Figure 16 It is Figure 2 a three-dimensional structural view of another embodiment of the middle air adjustment device.

[0042] Figure 17 It is Figure 16 a partial enlarged view of the structure at position A of the middle air adjustment device. Detailed implementation manners

[0043] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0044] It should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the auxiliary drawings. It is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the protection scope of the present invention. Specifically, in the present invention, the user's operation surface is taken as the front, the direction towards the ground is taken as the lower, and conversely, the direction away from the ground is taken as the upper. Other descriptions indicating orientation are defined based on "upper" and "lower".

[0045] In the various drawings of the present invention, for the convenience of illustration, the dimensions of some structures or parts are exaggerated relative to other structural parts. Therefore, it is only used to illustrate the basic structure of the subject matter of the present invention.

[0046] The present invention provides a mixed air device 50 and a refrigeration device having the same. For example, Figures 1 to 17 as shown, wherein the mixed air device 50 is used to mix and output the gas entering therein, and is particularly applicable in a refrigeration device. It cooperates with the fan 40, the air duct 20, and the odor detection device 30 of the refrigeration device to fully mix the gas to be pre-entered into the air duct 20 and then transport it into the air duct 20 to be detected by the odor detection device 30, so as to understand the odor situation of the gas in the storage room.

[0047] For example, Figures 1 to 2 as shown, the refrigeration device includes an air duct 20, a air distribution structure 21 located in the air duct 20, a fan 40 located on the air inlet side of the air distribution structure 21, and an odor detection device 30 located on the air outlet side of the air distribution structure 21. The air distribution structure 21 divides the air duct 20 into different areas, so that the odor detection device 30 can selectively detect the odor of the gas in a specific area.

[0048] It can be understood that the air duct 20 includes a supply air duct and a return air duct. The supply air duct is formed between the air duct cover plate and the inner wall of the rear of the inner tank to supply the cooled gas to the storage room. The return air duct is located at the lower part of the storage room and is used to connect the storage room and the refrigeration room. The gas that has undergone heat exchange in the storage room is transported to the refrigeration room through the return air duct to be cooled again. Since the gas circulates between the storage room and the refrigeration room, the odor of the gas passing through the gas path is considered to represent the odor in the storage room. Since the refrigeration room is located at the rear of the storage room, the return air duct connects the storage room and the refrigeration room in the front-rear direction. The radial direction of the return air duct is the lateral direction of the refrigeration device, and the extending direction of the return air duct is the front-rear direction of the refrigeration device.

[0049] As a preferred embodiment of the present invention, for example, Figure 1 and Figure 2 as shown, the air distribution structure 21 divides the air duct 20 into a middle air duct 22 and side air ducts 23 located on the side of the middle air duct 22. The air inlet 31 of the odor detection device 30 corresponds to the middle air duct 22. By setting the middle air duct 22 and the odor detection device 30 corresponding to the downstream of the middle air duct 22 in the refrigeration device, the gas is transported to the air duct 20 after being disturbed and mixed by the fan 40. The gas located at the edge of the air duct 20 is transported to the downstream of the air duct 20 through the side air ducts 23, and the odor detection device 30 only detects the gas with relatively uniform mixing transported through the middle air duct 22, so that the test result of the odor detection device 30 can truly reflect the odor of the gas in the storage room, enabling the user to dispose of it in time and improving the user experience.

[0050] Further, the middle air duct 22 includes a central air duct 221, an upper air duct 222 located above the central air duct 221, and a lower air duct 223 located below the central air duct 221. The odor detection device 30 is located on the air outlet side of the central air duct 221. The central air duct 221 is located at the exact center of the air duct 20. The arrangement of the central air duct 221 can transport the gases near the upper or lower side of the air duct 20 through the upper air duct 222 and the lower air duct 223 respectively. The central air duct 221 only transports the gas at the middle position of the air duct 20, so that the odor detection device 30 only detects the gas at the center position of the air duct, avoiding the influence of the gas at the edge part in contact with the inner wall of the air duct on the detection result.

[0051] Specifically, the air distribution structure 21 includes a pair of partition plates 211 extending to the inner wall of the air duct 20. The middle air duct 22 is formed between the pair of partition plates 211. The air distribution structure 21 further includes a pair of connecting plates 212 connected between the pair of partition plates 22. The connecting plates 212 are respectively located on both sides of the partition plates 211 along the length direction. The central air duct 221 is formed between the pair of partition plates 211 and the pair of connecting plates 212.

[0052] In this embodiment, the partition plates 211 extend in the vertical direction, and the connecting plates 212 extend in the horizontal direction. Of course, the partition plates 211 can also extend in the horizontal direction, and the connecting plates 212 are connected to the pair of partition plates 211 in the vertical direction, both of which can realize the formation of the central air duct 221.

[0053] As another preferred embodiment of the present invention, as Figure 11 shown, the air distribution structure 21 divides the air duct 20 into a main air duct 24 and auxiliary air ducts 25 located around the main air duct 24. The air inlet 31 of the odor detection device 30 corresponds to the main air duct 24. The volume of the main air duct 24 is larger than the volume of the auxiliary air ducts 25. The arrangement of the main air duct 24 can fully mix the gases in the main air duct 24 with a larger space. The gases entering the odor detection device 30 are more representative, and the test results can more truly reflect the odor of the gases in the storage room, reminding the user to dispose of them in time and improving the user experience.

[0054] In this embodiment, the auxiliary air ducts 25 are respectively located on both sides of the main air duct 24. The ratio of the volume of the main air duct 24 to the volume of each auxiliary air duct 25 is not greater than 16:13. The appropriate volume ratio between the main air duct 24 and the auxiliary air ducts 25 can obtain typical gases without affecting the circulation of other gases.

[0055] Specifically, the air distribution structure 21 includes a pair of partition plates 211 extending to the inner wall of the air duct 20. The main air duct 24 is formed between a pair of the partition plates 25, and the auxiliary air duct 25 is formed between the partition plate 211 and the inner wall of the air duct 20. In this embodiment, the lengths of the main air duct 24 and the auxiliary air duct 25 in the front-rear direction are the same, and the cross-sectional area of the main air duct 24 is larger than that of the auxiliary air duct 25.

[0056] It can be understood that when the cross-sectional areas of the main air duct 24 and the auxiliary air duct 25 in the transverse direction are equal, the length of the main air duct 24 in the front-rear direction is greater than that of the auxiliary air duct 25, and the technical effect of the larger volume of the main air duct 24 can also be achieved, which is also within the protection scope of the present invention.

[0057] Furthermore, the air distribution structure 21 further includes a pair of connecting plates 212 connected between the pair of partition plates 211. The main air duct 21 includes a central air duct 221 formed between the pair of connecting plates 212, an upper air duct 222 located above the central air duct 221, and a lower air duct 223 located below the central air duct 221. The volume of the central air duct 221 is not less than those of the upper air duct 222 and the lower air duct 223. The air inlet 31 of the odor detection device 30 is correspondingly arranged opposite to the central air duct 221. That is, the odor detection device 30 only detects the gas conveyed from the central air duct 221, so that the detection result can represent the actual gas situation in the storage room, so that the user can make timely disposal.

[0058] It can be understood that the central air duct 221 can be provided in both the return air duct and / or the supply air duct. The odor detection device 30 can be located downstream of the central air duct 221 in the return air duct or the supply air duct, and the odor of the gas in the storage room can be detected. Preferably, the odor detection device 30 is arranged in the central air duct 221 or at the air outlet of the return air duct, and the odor of the gas directly conveyed from the storage room can be tested, which can better reflect the actual situation of the gas in the storage room. Hereinafter, the case where the odor detection device 30 is located in the return air duct will be described in detail.

[0059] The odor detection device 30 includes a housing, an odor sensing unit and an air volume detection unit in the housing. The housing is provided with an air inlet 31, and the air inlet 31 is arranged facing the upstream of the air duct 20, so that the adjusted gas directly enters the housing for detection. The air volume detection unit is used to detect the air volume entering the housing, and gives corresponding indications when the air volume meets the requirements and also gives corresponding indications when the air volume does not meet the requirements. Preferably, the air inlet 31 is located at the middle position of the central air duct 221 in its radial direction to receive more representative gas.

[0060] In this embodiment, the refrigeration device further includes a grid plate disposed on the air outlet side of the air distribution structure 21, and the odor detection device 30 is fixed at a position corresponding to the central air duct 221 on the grid plate. Fixing the odor detection device 30 on the air distribution structure 21 can improve the stability of the test.

[0061] As Figures 1 to 2 shown, the fan 40 is located upstream of the return air duct to convey the gas in the storage room into the return air duct. In order to convey the gas at each position in the storage room into the return air duct, two fans 40 are provided and arranged horizontally along the refrigeration device. The supply air duct corresponds to the space between the two fans. Preferably, the intermediate air duct 22 is located between the two fans 40 along the arrangement direction of the fans, and the central air duct 22 is located in the middle of the fans 40 in the vertical direction.

[0062] As Figures 1 to 2 shown, the air mixing device 50 is located between the fan 40 and the return air duct. The air mixing device 510 includes a cylinder 51 forming an air mixing chamber 51. The length of the cylinder 51 is not less than the length of the air duct 20, so that the gas can be fully mixed in the air mixing chamber 510, and the gas conveyed into the air duct 20 can better represent the situation in the storage room.

[0063] As Figures 2 to 4 shown, the cylinder 510 includes an upper wall, a lower wall, and a pair of side walls connecting the upper wall and the lower wall. The air mixing chamber 510 is formed between the upper wall, the lower wall, and the side walls. The radial direction of the cylinder 51 is the up-down direction, and the axial direction of the cylinder 51 is the length direction of the cylinder 51. In this embodiment, the axial direction of the cylinder 51 is the front-back direction.

[0064] As Figures 2 to 10 shown, the air mixing device 50 further includes an air mixing plate 52 located in the air mixing chamber 510. The air entering the air mixing chamber 510 is fully mixed by the air mixing plate group 52. Specifically, the air mixing plate group 52 includes a converging plate 521 and a diverging plate 522 arranged at intervals in sequence. Among them, in the direction from the air inlet side to the air outlet side of the air mixing chamber 510, the converging plate 521 extends from the edge of the cylinder 51 towards the middle in the radial direction, and the diverging plate 522 extends from the middle of the cylinder 51 towards the edge. That is, the size of the air inlet end of the converging plate 521 is larger than the size of the air outlet end of the converging plate 521, and the size of the air inlet end of the diverging plate 522 is smaller than the size of the air outlet end of the diverging plate 522. First, the converging plate 521 is used to converge and mix the gas entering the air mixing cylinder 510 together, and then the diverging plate 522 is used to disperse and discharge the mixed gas. The mixed gas represents the real situation of all the gas before entering the air mixing chamber 510, providing a real reference for users and improving the user experience.

[0065] The air collecting plate 521 is symmetrically designed along the radial center of the cylinder body 51. The air collecting plate 521 forms an air inlet area 5213. The air collecting plate 521 guides the gas to the middle area of the cylinder body 51 for sufficient mixing and then can be transported along the radial center of the cylinder body 51 to the air diffusing plate 522, and further can be transported from the radial center of the cylinder body 51 to the middle position of the air duct 20, that is, the gas transported into the central air duct 221 along the radial center of the cylinder body 51 can better represent the real situation of the indoor gas in the storage room, which is beneficial for the odor detection device 30 to feedback the real data in the storage room.

[0066] Specifically, as Figure 5 shown, the air collecting plate 521 includes a pair of inner air collecting plates 5211 and a plurality of outer air collecting plates 5212 located outside the inner air collecting plates 5211. The inner air collecting plates 5211 are arranged close to the radial center of the cylinder body 51. The outer air collecting plates 5212 have the same shape as the inner air collecting plates 5211, and the inner air collecting plates 5211 and the outer air collecting plates 5212 are arranged at intervals along the radial direction of the cylinder body 51.

[0067] As Figure 6 shown, the ends of a pair of the inner air collecting plates 5211 close to the air inlet side form a first air inlet 5214, and the ends of a pair of the inner air collecting plates 5211 close to the air outlet side form a first air outlet 5215. The first air outlet 5215 is smaller than the first air inlet 5214, that is, a pair of the inner air collecting plates 5211 are in a funnel shape facing the air diffusing plate 522. The gas passing through the inner air collecting plates 5211 is more concentrated, so that the gas enters from the first air inlet 5214, converges and mixes, and then is led out from the first air outlet 5215. That is, the area between the air collecting plate and the air diffusing plate 522 forms a mixed air area 5216, and the gas flowing along the air collecting plate 521 is fully mixed in the mixed air area 5216.

[0068] In the radial direction of the cylinder body 51, the ratio of the size of the first air inlet 5214 to that of the mixed air cavity 510 is one-fourth to one-half. Preferably, the radial dimension of the first air inlet 5214 is one-third of that of the mixed air cavity 510. The size of the first air inlet 5214 can ensure that the wind speed of the gas mixed by the outer air collecting plates 5212 is weaker than that of the gas transported by the inner air collecting plates 5211, so that the gas introduced by the outer air collecting plates 5212 is impacted by the gas transported by the first air outlet 5215 and then mixed above or below the first air outlet 5215, improving the mixing efficiency and the stability of mixing.

[0069] An auxiliary air inlet and an auxiliary air outlet are formed between adjacent ones of the external air guide plates 5212 or between the external air guide plates 5212 and adjacent internal air guide plates 5211. The auxiliary air inlet is located on both sides of the first air inlet 5214 along the radial direction of the cylinder body 51, and the auxiliary air outlet is located on both sides of the first air outlet 5215 along the radial direction of the cylinder body 51.

[0070] In some embodiments, the air inlet ends of the internal air guide plates 5211 and the external air guide plates 5212 are located inside the air mixing cavity 510. That is, a reserved space is formed between the air inlet ends of the air guide plates 521 and the air inlet end of the cylinder body 51. When cooperating with the fan 40, the fan 40 can be arranged in the reserved space to convey gas into the air mixing cavity 510.

[0071] As Figure 5 shown, the air mixing plate group 52 further includes a deflector plate 523 located at the end of the air guide plate 521 close to the air outlet side. The deflector plate 523 extends along the axial direction of the cylinder body 51 from the end of the air guide plate 521. Since the air guide plate 521 is inclined towards the center of the air mixing cylinder 510, after the gas enters the interior of the air mixing cylinder 510 along the air guide plate 521, it is buffered and redirected by the deflector plate 523, preventing the gas from flowing towards the air outlet side of the cylinder body 51 too quickly, so that the gas is fully mixed near the deflector plate 523.

[0072] In this embodiment, the deflector plate 523 is closely connected to the air guide plate 521, so that there is no gap between the air guide plate 521 and the deflector plate 523. The air guided by the air guide plate 521 is directly buffered and redirected by the deflector plate 523. Preferably, the air guide plate 521 and the deflector plate 523 are integrally formed to improve the structural strength of the air guide plate 521 and the deflector plate 523.

[0073] As Figures 2 to 10 shown, the air mixing plate group 52 includes a pair of air diffuser plates 522 corresponding up and down, and the pair of air diffuser plates 522 are symmetrically designed with respect to the radial center of the cylinder body 51. The pair of air diffuser plates form an air diffusing area 5213. The air diffuser plates 522 exactly correspond to the internal air guide plates 5211, facilitating the gas mixed by the internal air guide plates 5211 to enter the air diffusing area 5213. The center of the air diffusing area 5213 corresponds to the central air duct 221 of the air duct 20, and the gas is facilitated to enter the central air duct 221 after being dispersed and buffered by the middle air diffuser plate 522.

[0074] The air inlet ends of the pair of air diffuser plates form a second air inlet 5224. The second air inlet 5224 is axially spaced from the first air outlet 5215 along the cylinder body 51, so that part of the gas after being fully mixed near the first air outlet 5215 directly enters the air diffusing area 5223 through the second air inlet 5224.

[0075] On the air outlet side of a pair of the air diffusing plates 522, a second air outlet 5225 is formed. The dimension of the second air outlet 5225 in the radial direction of the cylinder body 51 is larger than that of the second air inlet 5224, so that the air diffusing plate 522 forms a horn shape opening towards the air outlet side, which can slow down the flow rate of the gas and make the gas entering the air duct 20 relatively uniform.

[0076] The radial dimension of the second air outlet 5225 along the cylinder body 51 is equivalent to the radial dimension of the entire air collecting plate 521 along the cylinder body 51, which is beneficial to transporting the gas.

[0077] Specifically, as Figure 5 shown, the air diffusing plate 522 has a first section 5221 close to the air inlet side and a second section 5222 close to the air outlet side. The included angle between the first section 5221 and the axial direction of the cylinder body 51 is larger than the included angle between the second section 5222 and the axial direction of the cylinder body 51. The gas entering the air diffusing area 5223 is buffered when it reaches the second section 5222, and part of the gas is secondarily mixed with the gas in the middle area of the cylinder body 51.

[0078] As a preferred embodiment of the present invention, as Figure 5 shown, the air mixing plate group 52 further includes a wind dividing member 523 located between the air collecting plate 521 and the air diffusing plate 522. The wind dividing member 523 is located at the radial center position of the cylinder body 51. The wind dividing member 523 divides the air mixing area 5216 into an upper air mixing area and a lower air mixing area in the radial direction of the cylinder body 51. The wind dividing member 523 separates the gas output from the first air outlet 5215 in the radial direction of the cylinder body 51 and makes it enter the upper air mixing area and the lower air mixing area respectively. Specifically, when the gas flows from the funnel-shaped inner air collecting plate 5211 to the air guiding member 524, the wind speed increases. After the gas impacts the middle air guiding member 524, it will guide the wind to a farther distance on the upper and lower sides, and then fully mix with the gas transported by the auxiliary air outlet in the upper air mixing area and the lower air mixing area respectively, and enter the second air inlet 5224 along the end of the wind dividing member 523 and then enter the air diffusing area 5223.

[0079] Preferably, the wind dividing member 523 is arranged closer to the air collecting plate 521 than the air diffusing plate 522, so that the gas entering the air mixing area 5216 can be guided into the upper air mixing area and the lower air mixing area by the wind dividing member 523 in a shorter time. The design of the wind dividing member 523 combined with the size of the first air inlet 5214 enables the gas transported through the auxiliary air outlet to be mixed with the gas guided by the wind dividing member 523 at the center of the upper air mixing area or the lower air mixing area, improving the efficiency and stability of air mixing.

[0080] Preferably, the wind dividing member 523 is arc-shaped and protrudes towards the air collecting plate 521. The arc-shaped wind dividing member 521 can play a role in guiding the wind.

[0081] It is understandable that the air distribution member 523 can be an arc-shaped plate or a barrel shape. As long as the surface facing the air collecting plate 521 is an arc surface, the technical effect of air distribution can be achieved, and all are within the protection scope of this application.

[0082] Preferably, in the radial direction of the cylinder body 51, the size of the air distribution member 523 is not less than the size of the first air outlet 5215. The gas output from the first air outlet 5215 is separated up and down by the air distribution member 523 and will not directly cross the air distribution member 523 and enter the second air inlet 5224.

[0083] As another preferred embodiment of the present invention, as Figures 2 to 10 shown, the air mixing plate group 52 further includes at least one air guiding member 524 located in the air scattering area 5223. Part of the gas entering the air scattering area 5223 from the second air inlet 5224 is guided by the air guiding member 524 into the air duct 20 on the air outlet side.

[0084] The air guiding member 524 is arranged close to the first section 5221. Preferably, in the radial direction of the cylinder body 51, the air guiding member 524 is larger than the size of the second air inlet 5224. When the gas located near the center of the air scattering area 5223 passes through the air guiding member 524, the gas bypasses the air guiding member 524 and changes direction, mixes with the gas on both sides of the air guiding member 524 again, and then is transported into the air duct 20 on the air outlet side.

[0085] In a specific embodiment, as Figures 4 to 7 shown, the air guiding member 524 is a columnar closed shape, including but not limited to a cylindrical shape, an elliptical cylindrical shape, and a spindle-shaped columnar shape. The air guiding member 524 buffers the air and can evenly distribute the air, and guides part of the air to blow upward or downward and mix with the air near the air scattering plate 522. Another part bypasses the air guiding member 524 along the arc surface of the air guiding member 524 and then is led out from the air outlet side of the cylinder body 51.

[0086] In another specific embodiment, as Figure 9 shown, the air guiding member 524 is a semi-closed shape opening towards the air outlet side of the cylinder body 51. The air guiding member 524 includes but not limited to a semi-cylindrical shape, a horn-shaped columnar shape, and a triangular columnar shape. The air guiding member 524 guides the air to the vicinity of the air scattering plate 522 for mixing, and then is guided by the inner wall of the air scattering plate 522 to the air outlet side.

[0087] In another specific embodiment, as Figure 8As shown, the air guiding member 524 is in a semi-closed shape facing the second air inlet 5214. The air guiding member 524 has an air guiding surface protruding towards the second air outlet. The air guiding member 524 includes, but is not limited to, an inverted C-shaped column and an inverted arc-shaped column. After the wind blows onto the air guiding member 524, it is respectively guided to the upper and lower air diffusing plates 522 and mixed with the air of the accessory, and then is guided by the air guiding surface to the air outlet side of the cylinder body 51.

[0088] In another specific embodiment, as Figure 10 shown, the air guiding member 524 includes several, which can be a single combination of any shape in the above embodiments, or an arbitrary combination of multiple shapes.

[0089] It can be understood that when only one air guiding member 524 is provided, the air guiding member 524 is located at the center of the air diffusing area 5223 along the radial direction of the cylinder body 51; or, when several air guiding members 524 are provided, several air guiding members 524 are symmetrically arranged with respect to the center of the cylinder body 51 along the radial direction.

[0090] As another preferred embodiment of the present invention, as Figure 2 and Figure 3 shown, the air mixing device 50 further includes an air guiding structure 53 fixed to the air outlet end of the cylinder body 51. The air guiding structure 53 includes a pair of inner air guiding plates 531 arranged up and down, that is, the inner air guiding plates 531 are fixed to the upper wall and the lower wall. The pair of inner air guiding plates 531 extend obliquely towards each other from the end of the cylinder body 51 into the air mixing cavity 510, so that the gas is more concentrated between the pair of inner air guiding plates 531, which is beneficial to conveying the gas to the odor detection device 30 in the central air duct 221 of the air duct 20.

[0091] Furthermore, as Figure 4 shown, the included angle between the inner air guiding plate 531 and the axial direction of the cylinder body 51 is between 30° and 60°. Preferably, the included angle between the inner air guiding plate 531 and the axial direction of the cylinder body 51 is 45°. After the gas horizontally passes through the inner wall of the inner air guiding plate 531, it is guided to flow towards the central direction along the radial direction of the cylinder body, and is mixed again with the gas below or above the inner air guiding plate 531, and then is conveyed to the odor detection device 30 in the corresponding central air duct 221 of the downstream air duct 20.

[0092] The air outlet end of the inner air guiding plate 531 forms a third air outlet. The third air outlet is the air outlet side of the air mixing device 50. The dimension of the third air outlet along the radial direction of the cylinder body is smaller than the dimension of the second air outlet along the radial direction of the cylinder body. The gas conveyed from the air diffusing area 5223 to the air outlet flows along the axial direction of the cylinder body 51 to the inner wall of the inner air guiding plate 531, and after being blocked by the inner wall of the inner air guiding plate 531, it flows downward and is mixed again with the gas in the middle of the air diffusing area 5223, and then is output from the third air outlet.

[0093] Furthermore, as Figure 3 shown, the air guiding structure 531 further includes a pair of outer air guiding plates 532 fixed to the side wall of the cylinder 51. That is, the outer air guiding plates 532 are fixed to the side wall, and the outer air guiding plates 532 extend obliquely outward from the end of the cylinder 51, dispersing the gas in the transverse direction of the cylinder 51, which is beneficial to the transportation of the gas to the air duct 20.

[0094] Furthermore, the included angle between the outer air guiding plate 532 and the axial direction of the cylinder 51 is between 30° and 60°. Preferably, the included angle between the outer air guiding plate 532 and the axial direction of the cylinder 51 is 45°, so that the air volume in the middle of the cylinder 51 is greater than that on both sides, which is beneficial to transporting more gas to the odor detection device 30 in the central air duct 221.

[0095] Furthermore, the width of the outer air guiding plate 532 is 10 mm to 12 mm. The appropriate size of the outer air guiding plate 532 can not only disperse the gas but also does not affect the normal transportation of the gas at the middle position along the axial direction in the mixing air cavity 510.

[0096] As another preferred embodiment of the present invention, as Figures 12 to 17 shown, the refrigeration equipment further includes an air regulating device 10 disposed in the central air duct 221 and upstream of the odor sensor 30, which regulates the uniformity of the wind speed before entering the odor detection device 30, improves the detection accuracy of the odor detection device 30, can accurately feedback the odor in the storage room to the user, and the user can effectively judge the freshness state of the items in time, improving the user experience.

[0097] In this embodiment, the air regulating device 10 is located in the central air duct 221 of the return air duct. The air regulating device 10 directly regulates the wind speed transported from the storage room, and then is detected by the odor detection device 30. The entire air path is shorter, and the gas will not be leaked or polluted. The detection result can better represent the real situation of the entire storage room.

[0098] It can be understood that when the odor detection device 30 is located in the supply air duct or at the air outlet, the air regulating device 10 is located upstream of the corresponding supply air duct, and the detection of the gas in the storage room can also be realized.

[0099] Specifically, the air regulating device 10 includes an air regulating plate 131, a downstream air measuring assembly 12 located between the air regulating plate 131 and the odor detection device 30, and a control unit. The control unit controls the movement or rotation of the air regulating plate 131 to adjust the size of the air vent 1310 formed between the air regulating plate 131 and the inner wall of the air duct 20 or between the air regulating plates 131. The air inlet of the odor detection device 30 is arranged facing the downstream air measuring assembly 12. The air entering the downstream of the central air duct 221 after being regulated by the air regulating device 10 is in a uniform speed state, which can reduce the interference of the wind speed on the odor detection device 30 and improve the accuracy of the odor detection device 30.

[0100] As Figures 12 to 17 shown, the dimension of the downstream air measuring assembly 12 in the radial direction of the air duct 20 is not less than half of the length of the air regulating plate 131, reducing the range of the downstream air outlet side of the air duct 20 and delivering the regulated uniform air to the odor detection device 30 in a targeted manner.

[0101] The downstream air measuring assembly 12 includes a plurality of downstream fans 121. The plurality of downstream fans 121 enclose a wind gathering area 123 communicating with the air inlet 31 of the odor detection device 30. The regulated uniform air passes through the arrangement of the downstream fans 121 and is gathered into a range convenient for the odor detection device 30 to receive.

[0102] Preferably, there are at least three downstream fans 121, and the downstream fans 121 are arranged in a horn shape or a V shape, with the opening facing the odor detection device 30.

[0103] The downstream air measuring assembly 12 further includes a downstream sensor 122 for detecting the rotation speed of the downstream fans 121. The downstream sensor 122 is communicatively connected to the control unit to obtain the rotation speed of the downstream fans 121 in a timely manner. The control unit adjusts the angle of the air regulating plate 131 according to the rotation speed of the downstream fans 121, and further adjusts the size of the air vent 1310 to make the gas entering the downstream of the central air duct 221 in a uniform speed state.

[0104] Preferably, the downstream sensor 122 is located in the middle of two adjacent downstream fans 121 to reduce the test error of the downstream fans 121.

[0105] As another preferred embodiment of the present invention, as Figure 12 and Figure 13 shown, the air regulating device 10 further includes an upstream air measuring assembly 11 located in the central air duct 221 and upstream of the air regulating plate 131. The upstream air measuring assembly 11 includes a plurality of upstream fans 111 and an upstream sensor 121 for detecting the rotation speed of the upstream fans 111.

[0106] The upstream fans 111 are arranged in sequence along the radial direction of the air duct 20 to evenly convey the air in the radial direction of the air duct 20 to the downstream. The height of the upstream fans 111 is not less than the height of the downstream fans 121, improving the air supply efficiency of the upstream fans 111.

[0107] The upstream sensor 112 is communicatively connected to the control unit to timely obtain the rotational speed of the upstream fans 111. Preferably, the upstream sensor 112 is located in the middle of two adjacent upstream fans 111, reducing the test error of the upstream fans 111.

[0108] In this embodiment, as Figure 12 and Figure 13 shown, the air regulating device 10 includes a plurality of air regulating plate units 13 located between the upstream air measuring assembly 11 and the downstream air measuring assembly 12. The plurality of air regulating plate units 13 are rotatably connected in the air duct 20 and close the air duct 20 when the plurality of air regulating plate units 13 are coplanar. Among them, the plurality of air regulating plate units 13 being coplanar includes the air regulating plate units 13 being coplanar or co-curved, both of which can close the air duct 20. Preferably, the height of the air regulating plate unit is higher than that of the upstream and downstream fans to close the air duct.

[0109] The air regulating plate 131 is a component of the air regulating plate unit 13. Specifically, each air regulating plate unit 13 includes an air regulating plate 131 and a rotating shaft 132 fixedly connected to the air regulating plate 131. The rotating shaft 132 is rotatably connected to the inner wall of the central air duct 221, and the rotating shaft 132 is communicatively connected to the control unit. The control unit controls the rotation of the rotating shaft 132, and the rotation of the rotating shaft 132 drives the air regulating plate 131 to rotate. After the air regulating plate 131 rotates by a certain angle, a ventilation opening 1310 is formed between the edge of the air regulating plate 131 and the inner wall of the air duct 20 or between the edges of two adjacent air regulating plates 131. The upstream fans 111 drive the gas to enter the downstream from the ventilation opening 1310, thereby driving the downstream fans 121 to rotate or adjusting the rotational speed of the downstream fans 121.

[0110] The middle or one end of the air regulating plate 131 is fixedly connected to the rotating shaft 132, and the rotation of the rotating shaft 132 drives both ends or one end of the air regulating plate 131 to rotate, improving the diversity of the rotation angle of the air regulating plate 131.

[0111] Preferably, the air deflecting plates 131 are arranged in one-to-one correspondence with the upstream fans 111. In the arrangement direction of the upstream air measuring assembly 11 and the downstream air measuring assembly 12, the connection part between two adjacent air deflecting plates 131 is located between two adjacent upstream fans 111. The gas passing through two adjacent upstream fans 111 is mixed when passing through the same air vent 1310 and then enters the downstream of the central air duct 221. The air entering the downstream fan 121 can represent the situation of the entire air duct 20.

[0112] In this embodiment, the control unit is respectively communicatively connected to the downstream sensor 121, the upstream sensor 122, and the air deflecting plate 131. Among them, the control unit is communicatively connected to the rotating shaft 132. The control unit controls the rotation of the rotating shaft 132 according to the signals of the downstream sensor 122 and the upstream sensor 112, and the air deflecting plate 131 rotates to adjust the angle of the air deflecting plate 131 to open or close the air duct 20.

[0113] As another preferred embodiment of the present invention, as Figures 13 to 17 shown, the air regulating device 10 further includes at least one air plate assembly 14 located in the central air duct 221 and upstream of the downstream air measuring assembly 12. The air plate assembly 14 is arranged radially along the central air duct 221 and can close the air duct 20.

[0114] The air deflecting plate 131 is a component of the air plate assembly 14. Specifically, the air plate assembly 14 includes an air deflecting plate 131, at least one window 142 located on the air deflecting plate 131, and a sub-air plate 143 rotatably connected to the air deflecting plate 131 to open or close the window 142. The sub-air plate 143 has a free state of covering the window 142 and an air outlet state of being rotated by an external force to open the window 142. When the sub-air plate 143 is in the free state, the air plate assembly 14 closes the air duct 20.

[0115] The sub-air plate 143 is opened by the external force of the wind to connect the upstream and downstream of the central air duct 221. The gas enters the downstream from the window 142 and drives the downstream fan 121 to rotate. The control unit controls the rotation of the air deflecting plate 131 according to the signal of the downstream sensor 122. After the air deflecting plate 131 rotates, an air vent 1310 is formed between the edge of the air deflecting plate 131 and the inner wall of the air duct 20 or between two adjacent air deflecting plates 131, and the rotation angle of the air deflecting plate 131, that is, the size of the air vent 1310, is adjusted multiple times through the feedback of the downstream sensor 122 until the gas with uniform wind speed is conveyed from the air outlet side of the central air duct 221 to the odor detection device 20.

[0116] Furthermore, as Figure 13 and Figure 14As shown, a pair of contact portions 144 are provided at intervals at the lower end of the air regulating plate 13. A signal connection unit (not shown) is provided in a track 26 provided on the inner wall of the central air duct 221 for the contact portion 144 to move. The control unit is communicatively connected to the contact portion 144 or the signal connection unit to control the contact portion 144 to move along the track, thereby driving the air plate assembly 14 to rotate.

[0117] Preferably, the control unit is communicatively connected to the signal connection unit, and the contact portion 144 is in contact with the signal connection unit.

[0118] In a specific embodiment of this Embodiment 1, the track 26 and the signal connection unit therein are arc-shaped. The control unit controls the signal connection unit and drives the contact portion 144 to move along the track 26. Since the track 26 is arc-shaped, the contact portion 144 drives the air plate assembly 14 to rotate during the process of moving along the track 26. An air vent 1310 is formed between the edge of the air regulating plate 131 and the inner wall of the air duct 20. The signal connection unit feeds back the angle information of the rotation of the air regulating plate 131 to the control unit so that the control unit can give the next instruction.

[0119] It can be understood that when there are multiple air plate assemblies 14, the air vent 1310 is formed not only between the air regulating plate 13 and the inner wall of the central air duct 221, but also between two adjacent air regulating plates 131.

[0120] In another specific embodiment, the track 26 extends linearly along the axial or radial direction of the air duct. When several air plate assemblies 14 are coplanar, the central air duct 221 is closed. The control unit controls the signal connection unit and drives the contact portion 144 to move along the track 26, thereby driving the air plate assembly 14 to move along the radial or axial direction of the central air duct 221. An air vent 1310 is formed between the air regulating plate 131 and the inner wall of the central air duct 221 or between two adjacent air regulating plates 131. At the same time, the signal connection unit collects the distance information of the linear movement of the air regulating plate 131 and feeds it back to the control unit so that the control unit can give the next instruction.

[0121] In this embodiment, the air vent 1310 formed between two adjacent air regulating plates 131 is formed by the two air regulating plates 131 being misaligned with each other along the radial or axial direction of the central air duct 221. Similarly, the size of the air vent 1310 can be adjusted by adjusting the position of the air regulating plate 131.

[0122] Further, the air plate assembly 14 includes a plurality of windows 142, and the plurality of windows 142 are arranged in a matrix on the air regulating plate 131. Correspondingly, the air plate assembly 14 includes a plurality of the sub-air plates 143, and the sub-air plates 143 are arranged in a matrix. The windows 142 are uniformly arranged along the radial direction of the central air duct 221, so that the gas upstream of the central air duct 221 enters the downstream through the plurality of windows 142 and the wind speed is as close to a uniform state as possible.

[0123] The air plate assembly 14 further includes a fixed shaft (not shown) for rotatably connecting the sub-air plates 143. The sub-air plates 143 are rotated relative to the fixed shaft by the external force of the wind to open or close the windows 142.

[0124] Preferably, the fixed shaft is fixed in the middle in the up-down direction of the window 142, and the middle in the up-down direction of the sub-air plate 143 is matched with the fixed shaft. After the sub-air plate 143 is subjected to an external force, its upper and lower parts are rotated simultaneously to adjust the size of the window 142. The air plate assembly 14 communicates the upstream and downstream of the central air duct 221 through a plurality of windows 142, and can further make the wind speed entering the downstream of the central air duct 221 uniform.

[0125] In another specific embodiment of this embodiment, as Figure 16 and Figure 17 shown, the air plate assembly 14 further includes auxiliary windows 146 arranged at intervals from the windows 142, and an auxiliary air plate assembly 147 matched with the auxiliary windows 146. The control unit is communicatively connected to the auxiliary air plate assembly 147 to control and adjust the rotation or movement of the auxiliary air plate assembly 147, thereby adjusting the size of the covering of the auxiliary windows 146. The arrangement of the auxiliary windows 146 can perform multi-dimensional adjustment on the air regulating plate 131, and perform targeted adjustment on different positions along the radial direction of the central air duct 221, so as to improve the efficiency of adjusting the wind speed downstream of the central air duct 221.

[0126] In this embodiment, the window 142 is located in the middle in the up-down direction of the air regulating plate 131. The auxiliary windows 146 are provided in two rows and are respectively located on the upper side and the lower side of the window 142, and can adjust the uniformity of the gas transported to the downstream of the air duct 20 from multiple angles.

[0127] In a specific embodiment, as Figure 17As shown, the auxiliary wind plate assembly 147 includes an auxiliary shaft (not shown) extending up and down, an auxiliary sub-wind plate 1472 fixedly connected to the auxiliary shaft, and a bottom wall of the auxiliary window 146 is provided with a rotation groove 1473 for accommodating the auxiliary shaft, and the rotation groove 1473 is provided with an auxiliary signal connection unit (not shown) in contact with the auxiliary shaft, and the auxiliary signal connection unit is communicatively connected with the control unit, and the control unit drives the auxiliary signal connection unit and drives the auxiliary shaft to rotate according to the feedback of the downstream sensor 122, thereby driving the auxiliary sub-wind plate 1472 to rotate, and at the same time, the signal connection unit also collects the rotation angle of the auxiliary shaft to determine whether further adjustment is needed.

[0128] In this embodiment, each auxiliary signal connection unit is connected to the signal connection unit in parallel through a communication line, and then is connected to the control unit for communication.

[0129] It can be understood that the control unit can independently control the auxiliary wind plate assembly 147 to adjust the size of the auxiliary window 146 according to needs, and can also independently control the rotation angle and moving distance of the air regulating plate 131 according to needs, or can simultaneously control the auxiliary wind plate assembly 147 and the air regulating plate 131 to improve the efficiency of the adjustment.

[0130] In summary, the air mixing device 50 of the present invention utilizes the air mixing plate group 52 in the air mixing chamber 510 to fully mix the gas entering the air mixing chamber 510 and then separate it. The gas discharged from the air outlet side of the cylinder 51 is more representative, providing users with real situations and improving the user experience.

[0131] It should be understood that although the present specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0132] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A mixing air device, characterized in that, Comprising: A cylinder body which forms a mixing air cavity; A mixing air plate group located in the mixing air cavity. The mixing air plate group includes a converging air plate and a diverging air plate which are arranged at intervals in sequence. Among them, in the direction from the air inlet side to the air outlet side of the mixing air cavity, the converging air plate extends from the edge of the cylinder body towards the radial middle, and the diverging air plate extends from the middle of the cylinder body towards the edge.

2. The mixing air device according to claim 1, characterized in that, Both the converging air plate and the diverging air plate are symmetrically designed with respect to the radial center of the cylinder body.

3. The mixing air device according to claim 1, characterized in that, The converging air plate includes a pair of inner converging air plates. The air inlet ends of the pair of inner converging air plates form a first air inlet. In the radial direction of the cylinder body, the ratio of the size of the first air inlet to the size of the mixing air cavity is one-fourth to one-half.

4. The mixing air device according to claim 1, characterized in that, The mixing air plate group further includes a flow guiding plate near the air outlet end of the converging air plate, and the flow guiding plate extends along the axial direction of the cylinder body.

5. The mixing air device according to claim 1, characterized in that, The diverging air plate has a first section near the air inlet side and a second section near the air outlet side. The included angle between the first section and the axial direction of the cylinder body is greater than the included angle between the second section and the axial direction of the cylinder body.

6. The mixing air device according to claim 1, characterized in that, The mixing air plate group further includes a wind dividing structure located between the converging air plate and the diverging air plate.

7. The mixing air device according to claim 6, characterized in that, The wind dividing structure is arranged closer to the converging air plate relative to the diverging air plate.

8. The mixing air device according to claim 6, characterized in that, The wind dividing structure is arc-shaped and protrudes towards the direction of the converging air plate.

9. The mixing air device according to claim 6, characterized in that, The converging air plate includes a pair of inner converging air plates. The air outlet ends of the pair of inner converging air plates form a first air outlet. In the radial direction of the cylinder body, the size of the first air outlet is not greater than the size of the wind dividing structure.

10. The mixing air device according to claim 6, characterized in that, The mixing air plate group includes a pair of diverging air plates corresponding up and down. The pair of diverging air plates form a diverging air area. The air inlet ends of the pair of diverging air plates form a second air inlet. The mixing air plate group further includes at least one air guiding member located in the diverging air area. In the radial direction of the cylinder body, the air guiding member is larger than the size of the second air inlet.

11. The mixing air device according to claim 10, characterized in that, One of the air guiding members is located at the center of the diverging air area along the radial direction of the cylinder body; or several of the air guiding members are symmetrically arranged with respect to the radial center of the cylinder body.

12. The mixing air device according to claim 1, characterized in that, The cylinder body includes an upper wall, a lower wall, and a pair of return air plates respectively fixed on the upper wall and the lower wall. In the axial direction of the cylinder body, the return air plates are located between the converging air plate and the diverging air plate. The return air plates face towards the inside of the mixing air cylinder and extend towards the air inlet side. In the axial direction of the cylinder body, the projections of the return air plates partially overlap with the converging air plate and the diverging air plate.

13. The mixing air device according to any one of claims 1 to 12, characterized in that, The mixing air device further includes a wind guiding structure fixed at the air outlet end of the cylinder body. The wind guiding structure includes a pair of inner wind guiding plates arranged up and down. The pair of inner wind guiding plates extend obliquely towards each other from the end of the cylinder body into the mixing air cavity. The included angle between the inner wind guiding plates and the axial direction of the cylinder body is between 30° and 60°.

14. The mixing air device according to claim 13, characterized in that, The inner wind guiding plates form a third air outlet. The air outlet end of the diverging air plate forms a second air outlet. The size of the third air outlet along the radial direction of the cylinder body is smaller than the size of the second air outlet along the radial direction of the cylinder body.

15. The mixing air device according to claim 13, characterized in that, The wind guiding structure includes a pair of outer wind guiding plates fixed on the side wall of the cylinder body. The outer wind guiding plates extend obliquely outwards from the end of the cylinder body. The included angle between the outer wind guiding plates and the axial direction of the cylinder body is between 30° and 60°.

16. The mixing air device according to claim 15, characterized in that, The width of the outer wind guiding plates is 10 mm to 12 mm.

17. A refrigeration device, characterized in that, Comprising: The mixing air device according to any one of claims 1 to 16.

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