Refrigeration device

Abstract

The utility model provides a refrigerating device which comprises a box body, a refrigerating chamber with an opening in the front side is formed in the box body; the air outlet channel is arranged at the top of the refrigeration chamber, an air outlet part is arranged at the front end of the air outlet channel, and an air outlet communicated with the refrigeration chamber is formed in the bottom of the air outlet part; the first air dividing plate and the second air dividing plate divide the interior of the air outlet part into an air equalizing air channel, a first air dividing channel and a second air dividing channel, the first air dividing channel is formed between the rear side of the first air dividing plate and the front side of the second air dividing plate, and the second air dividing channel is formed between the rear side of the second air dividing plate and the rear side wall of the air outlet part; the flow equalizing air channel is formed between the front side wall of the air outlet part and the front side of the first air distributing plate; the flow equalizing piece is located at the air outlet end of the flow equalizing air channel. The air curtain forms the flow velocity distribution that the air speed of air flow is high inside and low outside, external hot air is effectively prevented from directly invading into the refrigerating chamber on the inner side, and the heat preservation effect of the refrigerating device is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, and mainly relates to a refrigeration device. Background Art

[0002] A display cabinet is a common refrigeration equipment used in shopping malls, supermarkets, bars, KTVs and other places to refrigerate wines, beverages, fruits and vegetables, cosmetics, etc. The display cabinet has the characteristics of being open, and at the same time has the characteristics of intuitive display and convenient customer picking.

[0003] Among them, since the display cabinet is open or the cabinet door needs to be opened and closed frequently, it is necessary to set up an air curtain type display cabinet to separate the storage space from the external environment and ensure the temperature of the storage space. After the refrigerator is opened, the air curtain structure can generate an air flow to isolate the air flow inside and outside the refrigerator, thereby achieving a heat preservation effect.

[0004] The traditional air curtain type refrigerated display cabinet uses a simple air outlet form at the air curtain air outlet. The air velocity of the entire air curtain shows a parabolic distribution, and the air velocities of the inner layer and the outer layer are relatively small. Although it can reduce the external overflow of cold air to the outside, it still cannot achieve a good heat preservation effect inside the cabinet. Summary of the Utility Model

[0005] Based on the problem that the air curtain air velocity distribution of the refrigeration device in the prior art fails to achieve a good heat preservation effect inside the cabinet, a refrigeration device is provided.

[0006] To solve the above technical problems, the utility model has taken the following technical solutions:

[0007] One aspect of the present application provides a refrigeration device, including: a box body, which forms a refrigeration compartment with an opening at the front side; an air outlet channel, the air outlet channel is arranged at the top of the refrigeration compartment, the front end of the air outlet channel is provided with an air outlet part, and an air outlet is formed at the bottom of the air outlet part to communicate with the refrigeration compartment; a first air distribution plate, which is arranged in the air outlet part and extends to the air outlet; a second air distribution plate, which is arranged in the air outlet part and extends to the air outlet; the first air distribution plate and the second air distribution plate are arranged at intervals front and back; the first air distribution plate and the second air distribution plate divide the interior of the air outlet part into a uniform flow air duct, a first air distribution channel and a second air distribution channel. The first air distribution channel is formed between the rear side of the first air distribution plate and the front side of the second air distribution plate, the second air distribution channel is formed between the rear side of the second air distribution plate and the rear side wall of the air outlet part, and the uniform flow air duct is formed between the front side wall of the air outlet part and the front side of the first air distribution plate; a uniform flow part, which is arranged at the air outlet, and the uniform flow part is located at the air outlet end of the uniform flow air duct for uniformly blowing out the air flow at the air outlet end of the uniform flow air duct.

[0008] The above technical solution has the following advantages or beneficial effects:

[0009] In this application, a first air distribution plate and a second air distribution plate are provided in the air outlet part. The first air distribution plate and the second air distribution plate are used to divide the interior of the air outlet part into a uniform flow air duct, a first air distribution channel, and a second air distribution channel. Moreover, since the uniform flow member is arranged at the air outlet of the uniform flow air duct, the uniform flow member increases the air resistance of the air flow passing through the air outlet of the uniform flow air duct, so that the air flow blown out towards the front side of the refrigerating compartment after passing through the uniform flow member is decelerated, making it lower than the air flow speeds in the first air distribution channel and the second air distribution channel on the inner side. In this way, a flow velocity distribution with a faster inner part and a slower outer part of the air flow velocity can be formed in the horizontal direction of the air curtain. Moreover, the first air distribution channel and the second air distribution channel in the inner layer can further divide the air flow in the inner layer, which is beneficial to forming a stable high-speed air flow in the inner layer. The high-speed air flow in the inner layer acts as a barrier to effectively prevent the direct intrusion of external hot air into the refrigerating compartment on the inner side. The relatively low-speed air flow in the outer layer can effectively prevent the intrusion of external humid and hot air into the cabinet and affect the low-temperature commodities. Further, the relatively stable and lower-speed air flow formed by the outer layer passing through the uniform flow member can block the cold air in the cabinet from overflowing, thereby effectively improving the heat preservation performance of the display cabinet and achieving the effects of optimizing the temperature in the cabinet and reducing the refrigeration energy consumption.

[0010] In some embodiments of this application, a refrigeration device is provided. The ratio range of the sum of the inlet cross-sectional areas of the first air distribution channel and the second air distribution channel to the cross-sectional area of the air outlet channel is 0.4 to 0.6.

[0011] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0012] By controlling the ratio range of the sum of the inlet cross-sectional areas of the first air distribution channel and the second air distribution channel to the cross-sectional area of the air outlet channel, and at the same time combining the arrangement of the uniform flow member on the uniform flow air duct, the air flow speeds in the first air distribution channel and the second air distribution channel can be made greater than the air flow speed in the uniform flow air duct. On the other hand, it is also beneficial for the first air distribution channel, the second air distribution channel, and the uniform flow air duct to all obtain sufficient air volume, realizing the differential distribution of the air flow speeds on the outer side and the inner side.

[0013] In some embodiments of this application, a refrigeration device is provided. The ratio range of the sum of the outlet cross-sectional areas of the first air distribution channel and the second air distribution channel to the cross-sectional area of the air outlet is 0.1 to 0.25.

[0014] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0015] By controlling the ratio range of the sum of the outlet cross-sectional areas of the first air distribution channel and the second air distribution channel to the cross-sectional area of the air outlet, such that the ratio range of the two is within 0.1 to 0.25, and the sum of the outlet cross-sectional areas of the first air distribution channel and the second air distribution channel is less than the outlet cross-sectional area of the uniform flow air duct, it is possible to make the first air distribution channel and the second air distribution channel form an outlet that is narrower relative to the uniform flow air duct. When the air flow passes through the narrow channels, due to the reduction in the cross-sectional area of the channels in these two air ducts, high-speed air flows are formed at the air outlets of the first air distribution channel and the second air distribution channel, and then a dense and high-speed inner air curtain is formed inside the air curtain, effectively isolating the diffusion of external hot air into the refrigerated chamber.

[0016] In some embodiments of the present application, a refrigeration device is provided, wherein the inlet cross-sectional area of the first air distribution channel is greater than the outlet cross-sectional area of the first air distribution channel; the inlet cross-sectional area of the second air distribution channel is greater than the outlet cross-sectional area of the second air distribution channel; the inlet cross-sectional area of the second air distribution channel is greater than the inlet cross-sectional area of the first air distribution channel.

[0017] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0018] By setting the inlet cross-sectional area of the first air distribution channel to be greater than the outlet cross-sectional area of the first air distribution channel, the first air distribution channel is formed with a structure in which the cross-sectional area decreases from the inlet to the outlet. When the fluid passes through the first air distribution channel with a decreasing cross-sectional area, the flow velocity in the first air distribution channel will increase, and then the air outlet velocity of the first air distribution channel is greater than the air outlet velocity of the outer uniform flow air duct. By setting the inlet cross-sectional area of the second air distribution channel to be greater than the outlet cross-sectional area of the second air distribution channel, the second air distribution channel is formed with a structure in which the cross-sectional area decreases from the inlet to the outlet. When the fluid passes through the second air distribution channel with a decreasing cross-sectional area, the flow velocity in the second air distribution channel will increase, and then the air outlet velocity of the second air distribution channel is greater than the air outlet velocity of the outer uniform flow air duct.

[0019] In some embodiments of the present application, a refrigeration device is provided, wherein the ratio range of the inlet cross-sectional area of the first air distribution channel to the inlet cross-sectional area of the second air distribution channel is 0.5 to 0.8.

[0020] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0021] In this embodiment, by setting the ratio range of the inlet cross-sectional area of the first air distribution channel to the inlet cross-sectional area of the second air distribution channel to be 0.5 to 0.8, it is possible to make the second air distribution channel receive more air flow, and at the same time, when passing through the second air distribution channel with a gradually decreasing cross-sectional area, the air flow in the second air distribution channel will be further accelerated to a higher speed, and then a faster air flow is formed at the air outlet of the second air distribution channel relative to the first air distribution channel.

[0022] In some embodiments of the present application, a refrigeration device is provided. The rear side wall of the air outlet portion includes a first guiding wall and a rear air outlet wall. The upper end of the first guiding wall is connected to the front end of the bottom wall of the air outlet channel, the lower end of the first guiding wall is connected to the upper end of the rear air outlet wall, the rear air outlet wall extends downward, and the first guiding wall is inclined toward the upper end of the rear air outlet wall.

[0023] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0024] In this embodiment, the airflow at the bottom of the second air distribution channel can flow smoothly along the inclined wall surface when passing through the second air distribution channel under the guiding action of the first guiding wall, reducing the resistance of the airflow when passing through the second air distribution channel, contributing to the smooth flow of the airflow, and reducing the noise and vibration generated by wind resistance and the energy loss generated by airflow disorder.

[0025] In some embodiments of the present application, a refrigeration device is provided. The second air distribution plate includes a second guiding wall and a second air outlet wall. The second guiding wall is disposed at an interval above the front side of the first guiding wall. The lower end of the second guiding wall is connected to the upper end of the second air outlet wall. The second air outlet wall extends downward, and the second guiding wall is inclined toward the upper end of the second air outlet wall;

[0026] An outlet of the second air distribution channel is formed by enclosing between the lower end of the second air outlet wall and the rear air outlet wall;

[0027] A part of the second air distribution channel is located between the rear side of the second guiding wall and the front side of the first guiding wall, so that the airflow in the second air distribution channel flows downward along the first guiding wall and the second guiding wall toward the air outlet.

[0028] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0029] In this embodiment, by disposing the second guiding wall at an interval above the front side of the first guiding wall, an outlet of the second air distribution channel is formed between the lower end of the second air outlet wall and the second air outlet wall that extends downward. It can make the airflow in the second air distribution channel flow more smoothly downward when passing through the channel between the second guiding wall and the first guiding wall, reduce the wind resistance at the corner, and further form a stable-speed airflow at the outlet of the second air distribution channel.

[0030] In some embodiments of the present application, a refrigeration device is provided. The first air distribution plate is provided with a third guiding wall and a first air outlet wall. The third guiding wall is spaced above the front side of the second guiding wall. The lower end of the third guiding wall is connected to the upper end of the first air outlet wall. The first air outlet wall extends downward. The third guiding wall is inclined toward the upper end of the first air outlet wall.

[0031] An outlet of the first air distribution channel is formed by enclosing between the lower end of the first air outlet wall and the lower end of the second air outlet wall.

[0032] A part of the first air distribution channel is located between the rear side of the third guiding wall and the front side of the second guiding wall, so that the air flow in the first air distribution channel flows downward along the second guiding wall and the third guiding wall toward the air outlet.

[0033] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0034] By arranging the third guiding wall spaced above the front side of the second guiding wall, an outlet of the first air distribution channel is formed between the lower end of the third air outlet wall and the second guiding wall extending downward, which can make the air flow in the first air distribution channel flow out downward more smoothly when passing through the channel between the second guiding wall and the third guiding wall, reduce the air resistance at the corner of the air flow, and further form a stable-speed air flow at the outlet of the first air distribution channel.

[0035] In some embodiments of the present application, a refrigeration device is provided. The second air distribution plate includes a second air inlet wall. The lower end of the second air inlet wall is connected to the upper end of the second guiding wall. An inlet of the second air distribution channel is formed between the upper end of the second air inlet wall and the bottom wall of the air outlet channel.

[0036] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0037] By defining an inlet of the second air distribution channel between the upper end of the second air inlet wall and the bottom wall of the air outlet channel, the air flow in the air outlet channel can be effectively guided by the second air inlet wall and enter the second air distribution channel, thereby improving the smoothness of the air flow in the second air distribution channel, and the noise generated during the operation of the display cabinet will also be reduced accordingly.

[0038] In some embodiments of the present application, a refrigeration device is provided. The first air distribution plate includes a first air inlet wall. The lower end of the first air inlet wall is connected to the upper end of the first guiding wall. An inlet of the first air distribution channel is formed between the upper end of the first air inlet wall and the upper end of the second air inlet wall.

[0039] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0040] An inlet of a first air distribution channel is defined between a first air inlet wall and a second air inlet wall, so that the air flow in the air outlet channel can effectively enter the first air distribution channel under the guidance of the first air inlet wall and the second air inlet wall, thereby improving the smoothness of the air flow in the first air distribution channel, and the noise generated during the operation of the display cabinet for blowing will also be reduced accordingly.

[0041] In some embodiments of the present application, a refrigeration device is provided. A diversion portion is formed on the front side of the air outlet portion. The diversion portion includes a first diversion wall, a second diversion wall, and a third diversion wall. The upper end of the first diversion wall is connected to the top wall of the air outlet channel. The lower end of the first diversion wall is inclined downward and connected to the upper end of the second diversion wall. The lower end of the second diversion wall is inclined downward and connected to the upper end of the third diversion wall. The third diversion wall is inclined toward the air outlet and connected to the inner side wall of the air outlet. An included angle formed between the second diversion wall and the plane where the air outlet is located is greater than an included angle formed between the first diversion wall and the plane where the air outlet is located. An included angle formed between the second diversion wall and the plane where the air outlet is located is greater than an included angle formed between the third diversion wall and the plane where the air outlet is located.

[0042] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0043] In this embodiment, the second diversion wall has a larger inclination angle, so as to squeeze and divert the air flow in the uniform flow channel, so that most of the air flow blows out from the inner side and the middle of the uniform flow member, and a small part blows out through the outer side of the uniform flow member. This can not only make the air flow with the air volume decreasing from the inside to the outside form at the air outlet of the uniform flow channel, but also, under the squeezing action of the second diversion wall, the inner layer air speed at the air outlet of the uniform flow channel can be increased, and the outer layer air speed at the air outlet of the uniform flow channel can be reduced, which is beneficial to the formation of a wind curtain with a large inner layer flow speed and a small outer layer flow speed, and the speed of the wind curtain decreasing smoothly from the inside to the outside.

[0044] In some embodiments of the present application, a refrigeration device is provided. An included angle formed between the second diversion wall and the plane where the air outlet is located ranges from 60° to 80°.

[0045] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0046] In this way, by designing the inclination angle of the second diversion wall and making an included angle range from 60° to 80° between it and the top of the air outlet channel, most of the air flow blows out from the inner side and the middle of the uniform flow member, and a small part blows out through the outer side of the uniform flow member, and an air flow distribution structure with the wind curtain speed at the air outlet of the uniform flow channel decreasing smoothly from the inside to the outside is formed.

[0047] In some embodiments of the present application, a refrigeration device is provided, and the length range of the second diversion wall is 15 mm to 25 mm.

[0048] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0049] By designing the length range of the second diversion wall to be 15 mm to 25 mm, it is beneficial for the air flow flowing out through the uniform flow channel to be more distributed inside and in the middle of the uniform flow member, and a small part is distributed outside the uniform flow member, and a gas flow distribution structure is formed in which the air curtain speed at the air outlet of the uniform flow channel decreases smoothly from the inside to the outside.

[0050] In some embodiments of the present application, a refrigeration device is further provided, which further includes a condensation air duct and a return air duct;

[0051] The condensation air duct is arranged at the back side of the refrigeration compartment, the return air duct is arranged at the bottom of the refrigeration compartment, the top end of the condensation air duct is the air outlet end and is connected to the rear end of the air outlet channel, the bottom end of the condensation air duct is the air inlet end and is connected to the rear end of the return air duct, a return air port is arranged at the front end of the return air duct, and the return air port is communicated with the bottom area of the refrigeration compartment; the air outlet and the return air port are arranged opposite to each other vertically, and the return air port is arranged below the air outlet.

[0052] Another technical solution in the above technical solutions has the following advantages or beneficial effects:

[0053] In this embodiment, the condensation air duct can generate cold air, and the bottom end of the condensation air duct can be the air inlet end and is connected to the rear end of the return air duct. The air at the bottom area is guided back to the condensation air duct through the return air port, so that the return air duct can effectively recover and utilize the cooled air in the cabinet, reduce the demand for fresh air, and thus reduce the burden on the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0055] Figure 1 is a front view of the refrigeration device according to an embodiment of the present application;

[0056] Figure 2 is Figure 1 an internal sectional view of;

[0057] Figure 3 is Figure 2 a partial enlarged view of part A of;

[0058] Figure 4 is Figure 2 a partial enlarged view of part B of;

[0059] Figure 5 for Figure 2 One of the cross-sectional views of the center air outlet duct;

[0060] Figure 6 for Figure 5 Schematic diagram of the airflow in the middle air outlet channel;

[0061] Figure 7 for Figure 5 One of the cross-sectional views of the center air outlet duct;

[0062] Figure 8 for Figure 2 Dimensional diagram of the center air outlet channel;

[0063] Figure 9 for Figure 5 A partial enlarged view of point C;

[0064] Figure 10 for Figure 7 A partial enlarged view of point D.

[0065] The corresponding relationship between the reference numerals and component names is as follows:

[0066] 1 cabinet, 101 refrigeration compartments; 11 shelves, 12 fans;

[0067] 2 air outlet channel, 201 air outlet, 202 first air distribution channel, 2021 first middle section, 2022 first air outlet section, 203 second air distribution channel, 2031 second middle section, 2032 second air outlet section, 204 uniform flow duct;

[0068] 21 air outlet portion, 211 front side wall, 212 rear side wall, 2121 first guide wall, 2122 rear air outlet wall, 213 air guide portion, 2131 first guide wall, 2132 second guide wall, 2133 third guide wall, 22 top wall, 23 bottom wall;

[0069] 301: inlet of the first air distribution channel, 302: inlet of the second air distribution channel; 31: first air distribution plate, 311: third guide wall, 312: first air outlet wall, 313: first air inlet wall, 32: second air distribution plate, 321: second guide wall, 322: second air outlet wall, 323: second air inlet wall;

[0070] 4 current balancing components;

[0071] 5. Condensation air duct;

[0072] 6 return air ducts, 601 return air outlets. DETAILED DESCRIPTION

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0074] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0075] The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0076] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0077] The embodiments of the present utility model provide a refrigeration device. The refrigeration device in the embodiments of the present invention may be a refrigeration cabinet such as a refrigerator, a freezer, a beverage cabinet, a display cabinet, etc. Hereinafter, taking a display cabinet as an example, the improved technical solutions of the refrigeration device in the embodiments of the invention will be described in detail.

[0078] For the convenience of description, taking the display cabinet as the usage state, the direction facing the user is the front, the direction facing away from the user is the rear, the vertical direction of the display cabinet is the up and down direction, and the width direction of the display cabinet is the left and right direction.

[0079] Figure 1 The front view of the refrigeration device according to an embodiment of the present application; Figure 2 is Figure 1 the internal sectional view of.

[0080] As Figure 1 shown, the display cabinet provided by the embodiment of the present utility model may include a box body 1. The box body 1 may adopt a hollow structure such as a cuboid. The box body 1 forms the outer shell of the display cabinet. It should be noted that the box body 1 may also adopt a hollow shell structure of other shapes.

[0081] As Figure 2 shown, in some embodiments, a refrigerating compartment 101 with an opening at the front side may be formed inside the box body 1. The refrigerating compartment 101 may be provided in multiple numbers.

[0082] In some embodiments, the display cabinet may include an inner liner. The inner liner may be disposed inside the box body 1. The inner liner may form the refrigerating compartment 101.

[0083] As Figure 2 shown, in some embodiments, shelves may be provided inside the refrigerating compartment 101. The shelves 11 are used for placing goods to be displayed. The number of the shelves 11 may be set to multiple. The multiple shelves 11 may be arranged along the height direction of the display cabinet.

[0084] The display cabinet may include a refrigeration system. The refrigeration system may be disposed inside the box body 1. The refrigeration system may be used to provide cold air inside the display cabinet to maintain a low-temperature environment in each storage compartment.

[0085] In some embodiments, the refrigeration system may include a compressor (not shown in the figure). The compressor may be disposed in a compressor compartment. The compressor, as the power source of the refrigeration cycle, may suck in a refrigerant gas at low temperature and low pressure and compress it into a gas at high temperature and high pressure. The compressor may deliver the refrigerant at high temperature and high pressure to the condenser.

[0086] In some embodiments, the refrigeration system may include a condenser (not shown in the figure). The condenser may be located in the compressor compartment. The compressor may deliver the compressed refrigerant to the condenser. The condenser may condense the refrigerant vapor at high temperature and high pressure.

[0087] In some embodiments, the refrigeration system may include a throttling device (not shown in the figure). The condenser may deliver the condensed refrigerant to the throttling device. The throttling device may adopt a capillary tube. The throttling device may be used to throttle and depressurize the refrigerant.

[0088] In some embodiments, the refrigeration system may include an evaporator (not shown in the figure). The throttling device may deliver the refrigerant after throttling and depressurizing to the evaporator. The evaporator may be used for the refrigerant vapor to evaporate and boil to absorb the heat of the surrounding medium.

[0089] In some embodiments, an evaporator chamber (not shown in the figure) may be provided inside the box body 1. The evaporator may be disposed inside the evaporator chamber. The evaporator can be used to absorb the heat inside the evaporator chamber, so that a large amount of cold air is formed inside the evaporator chamber. The cold air is transported to the storage room interior, and the low-temperature storage function of the storage room interior can be realized.

[0090] In some embodiments, a duct assembly may be provided inside the box body 1. A supply air duct (not shown in the figure) may be formed inside the duct assembly. The supply air duct can communicate with the evaporator and the refrigerating compartment 101 to transport the cold air into the refrigerating compartment 101, thereby realizing the low-temperature storage function in the refrigerating compartment 101.

[0091] Figure 3 For Figure 2 Partial enlarged view of part A of Figure 4 For Figure 2 Partial enlarged view of part B of

[0092] As Figure 2 And Figure 3 As shown in

[0093] In some embodiments, the duct assembly may include an air outlet passage 2. The air outlet passage 2 may be provided at the top of the refrigerating compartment 101. An air outlet part 21 may be provided at the front end of the air outlet passage 2. An air outlet 201 communicating with the refrigerating compartment 101 may be formed at the bottom of the air outlet part 21.

[0094] Among them, the air outlet 201 is provided at the bottom of the air outlet part 21, so that an air flow with an air outlet direction facing downward can be formed at the air outlet 201. In this way, after the air flow passes through the air outlet part 21 of the outlet passage, the air flow can move downward on the front side of the refrigerating compartment 101, and then a air curtain is formed on the front side of the refrigerating compartment 101. The air curtain can effectively isolate the internal and external air flow, thereby improving the heat preservation performance and reducing the cold air loss.

[0094] As Figure 3 shown, in some embodiments, the air outlet 201 may be inclined with respect to the horizontal plane, which is beneficial to increasing the air outlet area of the air outlet 201.

[0095] As Figure 2 shown, in some embodiments, the duct assembly may include a condensation duct 5. The condensation duct 5 may be provided at the back side of the refrigerating compartment 101. The top end of the condensation duct 5 may be the air outlet end. The top end of the condensation duct 5 may be connected to the rear end of the air outlet passage 2.

[0096] In some embodiments, an evaporator (not shown in the figure) may be provided inside the condensation duct 5, so that the gas flowing through the evaporator forms cold air.

[0097] As Figure 2 And Figure 4As shown, the display cabinet may include a blower 12. The blower 12 is arranged to accelerate the air flow, so that the cold air formed after passing through the evaporator can flow towards the air outlet passage 2 at an accelerated speed, and flow out through the air outlet 201 of the air outlet part 21 to the front side of the refrigerating compartment 101.

[0098] As Figure 2 and Figure 4 shown, in some embodiments, the air duct assembly may include a return air duct 6. The return air duct 6 may be arranged at the bottom of the refrigerating compartment 101. The bottom end of the condensation air duct 5 may be the air inlet end and connected to the rear end of the return air duct 6. The front end of the return air duct 6 may be provided with a return air opening 601, and the return air opening 601 communicates with the bottom area of the refrigerating compartment 101. The air in the bottom area is guided back to the condensation air duct 5 through the return air opening 601, so that the return air duct 6 can effectively recycle and utilize the cooled air in the cabinet, reduce the demand for fresh air, and thus reduce the burden on the compressor.

[0099] As Figure 4 shown, in some embodiments, the blower 12 may be arranged in the return air duct 6.

[0100] In some other embodiments, the blower 12 may be arranged in the air outlet passage 2 at the top.

[0101] As Figure 2 and Figure 4 shown, in some embodiments, the air outlet 201 and the return air opening 601 may be arranged vertically opposite to each other. The return air opening 601 may be arranged below the air outlet 201. Since an air curtain is formed at the front side of the refrigerating compartment 101, the air outlet 201 and the return air opening 601 are arranged opposite to each other, which can effectively guide the air curtain to flow downward from the air outlet 201, and at the same time prompt the return air opening 601 to attract the air at the bottom of the refrigerating compartment 101 to flow back, forming a good circulating flow path. Further, the return air duct can effectively recycle and utilize the cooled air in the cabinet, thereby reducing the burden on the compressor and being beneficial to the energy conservation and environmental protection of the display cabinet.

[0102] Figure 5 For Figure 2 one of the cross-sectional views of the air outlet passage in

[0103] As Figure 2 and Figure 5 shown, in some embodiments, a first air distribution plate 31 may be arranged in the air outlet part 21. The first air distribution plate 31 may extend to the air outlet 201.

[0104] As Figure 2 and Figure 5As shown, in some embodiments, a second air distribution plate 32 may be provided inside the air outlet portion 21. The second air distribution plate 32 may extend to the air outlet 201; the first air distribution plate 31 and the second air distribution plate 32 may be arranged at intervals in the front-rear direction. The first air distribution plate 31 and the second air distribution plate 32 may divide the interior of the air outlet portion 21 to form a first air distribution channel 202, a second air distribution channel 203, and a flow equalizing air duct 204.

[0105] Among them, the first air distribution channel 202 may be formed between the rear side of the first air distribution plate 31 and the front side of the second air distribution plate 32, the second air distribution channel 203 may be formed between the rear side of the second air distribution plate 32 and the rear side wall of the air outlet portion 21, and the flow equalizing air duct 204 may be formed between the front side wall of the air outlet portion 21 and the front side of the first air distribution plate 31.

[0106] As Figure 2 and Figure 5 shown, in some embodiments, the air outlet portion 21 may include a flow equalizing member 4. The flow equalizing member 4 may be provided at the air outlet 201. The flow equalizing member 4 may be located at the air outlet end of the flow equalizing air duct 203.

[0107] Among them, the air flow velocity formed in the first air distribution channel 202 may be greater than the air flow velocity formed in the flow equalizing air duct 203. The air flow velocity formed in the second air distribution channel 203 may be greater than the air flow velocity formed in the flow equalizing air duct 203.

[0108] It should be noted that in the traditional air curtain type refrigerated display cabinet, due to the inertia of the air and the unreasonable setting of the deflector, in the air curtain on the front side of the refrigerating compartment 101, there is always a low-speed area in the innermost part of the air curtain, and the air curtain wind speed shows a parabolic distribution, that is, the wind speeds of the inner layer and the outer layer are relatively small, and the wind speed of the middle layer is large. The air curtain has a general effect of reducing the leakage of cold air from the refrigerating compartment 101, and it is impossible to achieve a good heat preservation effect for the goods in the cabinet, and it is difficult to optimize the temperature in the cabinet and reduce the refrigeration energy consumption.

[0109] Specifically, in the present application, a first air distribution plate 31 and a second air distribution plate 32 are provided in the air outlet part 21, and the first air distribution plate 31 and the second air distribution plate 32 are used to divide the interior of the air outlet part 21 into a first air distribution channel 202, a second air distribution channel 203, and a uniform flow air duct 204. Among them, the uniform flow air duct 204 is formed between the front side wall 211 of the air outlet part 21 and the front side of the first air distribution plate 31. The first air distribution channel is located between the first air distribution plate 31 and the second air distribution plate 32, and the first air distribution channel 203 is located between the second air distribution plate 32 and the rear side wall 212 of the air outlet part 21, that is, the first air distribution channel is located in front of the first air distribution channel 203, and the first air distribution channel is arranged between the first air distribution channel 203 and the uniform flow air duct 204. In this way, the uniform flow air duct 204 is located in front of the first air distribution channel 202 and the second air distribution channel 203. The uniform flow air duct 204 can be used to form the front side air flow of the air curtain, and the first air distribution channel 202 and the second air distribution channel 203 can be used to form the inner side air flow of the air curtain.

[0110] Moreover, since the uniform flow member 4 is arranged at the air outlet of the uniform flow air duct 204, the uniform flow member 4 increases the air resistance of the air flow passing through the air outlet 201 of the uniform flow air duct 204, so that the air flow blown out to the front side of the refrigerating compartment 101 after passing through the uniform flow member 4 is decelerated, making it lower than the air flow speed of the inner first air distribution channel 202 and the second air distribution channel 203.

[0111] In this way, the air curtain can form a flow velocity distribution with a fast inner and slow outer air flow velocity in the horizontal direction. The high-speed air flow in the inner layer acts as a barrier, effectively preventing the direct intrusion of external hot air into the inner refrigerating compartment 101 and preventing the intrusion of external humid and hot air into the cabinet and affecting the low-temperature commodities. The relatively stable lower-speed air flow formed by passing through the uniform flow member 4 in the outer layer can block the cold air in the cabinet from overflowing, thereby effectively improving the heat preservation performance of the display cabinet and achieving the effects of optimizing the temperature in the cabinet and reducing the refrigeration energy consumption.

[0112] As Figure 5 shown, in some embodiments, the uniform flow member 4 can be a uniform flow net or a uniform flow plate. Thus, the setting of the uniform flow member 4 makes the gas flowing out of the uniform flow air duct 204 flow more uniformly and stably, and the air flow can change from a turbulent state to a vertical diversion state, avoiding the formation of turbulence at the outlet and reducing the effect of isolating external hot air.

[0113] In some embodiments, the flow equalizing member 4 may be configured as a flow equalizing net having a honeycomb structure. A plurality of air outlet holes may be provided in the flow equalizing net. Among them, a plurality of air outlet holes are provided inside the honeycomb structure flow equalizing net, and these air outlet holes may be evenly distributed, so as to evenly distribute the passing air flow. When the air flow passes through the flow equalizer, the large vortices formed therein can be divided into small vortices, thereby reducing the turbulence degree of the air flow, which is beneficial to reducing the problem of turbulence formed at the outlet of the flow equalizing air duct 204, making the air flow flow out more smoothly, and forming a uniform air curtain on the outside.

[0114] As Figure 5 shown, in some embodiments, the air outlet passage 2 includes a top wall 22 and a bottom wall 23. The top wall 22 and the bottom wall 23 may be oppositely arranged, the top wall 22 may be located above the bottom wall 23, and an air outlet passage 2 may be formed by enclosing between the top wall 22 and the bottom wall 23, and the air flow passes through the cavity and then blows to the air outlet portion 21.

[0115] Figure 6 For Figure 5 the schematic diagram of the air flow in the air outlet passage; Figure 7 For Figure 5 one of the sectional views of the air outlet passage; Figure 8 For Figure 2 the dimension schematic diagram of the air outlet passage; Figure 9 For Figure 5 the partial enlarged view at C of

[0116] As Figure 6 and Figure 8 shown, in some embodiments, the ratio range of the sum of the inlet cross-sectional areas of the first air distribution passage 202 and the second air distribution passage 203 to the cross-sectional area of the air outlet passage 2 may be 0.4 to 0.6.

[0117] As Figure 6 and Figure 8 shown, in some embodiments, the distance from the inlet end of the first air distribution plate 31 to the bottom wall 23 is denoted as the inlet width D1, and the distance from the top wall 22 to the bottom wall 23 is D2, and D1 / D2 may be greater than 0.4.

[0118] As Figure 6 and Figure 8 shown, in some embodiments, the distance from the inlet end of the first air distribution plate 31 to the bottom wall 23 is denoted as the inlet width D1, and the distance from the top wall 22 to the bottom wall 23 is D2, and D1 / D2 may be less than 0.6.

[0119] The sum of the inlet cross-sectional areas of the first air distribution channel 202, the inlet cross-sectional area of the second air distribution channel 203, and the inlet cross-sectional area of the flow equalizing air duct 204 is the cross-sectional area of the air outlet channel 2. Specifically, the inlet end of the first air distribution plate 31 is arranged away from the air outlet 201, and the outlet end of the first air distribution plate 31 is arranged close to the air outlet 201. The distance between the inlet of the first air distribution plate 31 and the bottom wall 23 can be expressed as the sum of the inlet widths of the first air distribution channel 202 and the second air distribution channel 203. The ratio of the sum of the inlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 to the cross-sectional area of the air outlet channel 2 can be expressed by the ratio of their inlet widths. Denote the distance from the inlet end of the first air distribution plate 31 to the bottom wall 23 as the inlet width D1, and the distance from the top wall 22 to the bottom wall 23 as D2.

[0120] Thus, by controlling the ratio range of the sum of the inlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 to the cross-sectional area of the air outlet channel 2, and at the same time combining with the flow equalizer arranged on the flow equalizing air duct 204, the air flow velocity in the first air distribution channel 202 and the air flow velocity in the second air distribution channel 203 are both greater than the air flow velocity in the flow equalizing air duct 204. On the other hand, it is also beneficial to obtain sufficient air volume in the air duct, realizing the differential distribution of the air flow velocities on the outer side and the inner side.

[0121] When D1 / D2 is less than 0.4, the gas flow rates in the inner first air distribution channel 202 and the second air distribution channel 203 may be on the low side. The gas flow rate of the air flow with less air volume is low after flowing through the first air distribution channel 202 and the second air distribution channel 203, and it cannot play a good role in accelerating the air flow in the first air distribution channel 202 and the second air distribution channel 203. The gas flow rate in the outer flow equalizing air duct is on the high side. Such an air curtain air flow distribution is difficult to play a good role in blocking the external hot and humid air and cannot achieve an effective heat preservation effect, thus affecting the low-temperature supply in the refrigerated compartment.

[0122] When D"1 / D2 is greater than 0.6, the gas flow rates in the inner first air distribution channel 202 and the second air distribution channel 203 may be on the high side, making the gas flow rate formed after the air flow flows through the first air distribution channel 202 and the second air distribution channel 203 on the high side, and at the same time the air flow velocity is too fast; but the gas flow rate in the outer flow equalizing air duct 204 is on the low side. After the action of the flow equalizing component, the air flow velocity in the flow equalizing air duct 204 is too slow, and then the velocity difference between the inner and outer air flows is too large, making it easy to occur a turbulent phenomenon between the first air distribution channel 202, the second air distribution channel 203 and the flow equalizing air duct 204.

[0123] Such as Figure 8As shown, in some embodiments, the ratio range of the sum of the outlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 to the cross-sectional area of the air outlet 201 can be 0.1 to 0.25.

[0124] Among them, the sum of the outlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 and the sum of the outlet cross-sectional areas of the uniform flow air duct 204 are the cross-sectional area of the air outlet 201. Specifically, the ratio of the sum of the outlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 to the cross-sectional area of the air outlet 201 can be represented by the ratio of the outlet widths of the two. Denote the distance between the outlet of the first air distribution plate 31 and the inner side wall of the air outlet 201 as the outlet width D3, and the distance between the front side wall 211 and the rear side wall 212 as D4. The range value of D3 / D4 is 0.1 to 0.25.

[0125] In this way, by controlling the ratio range of the sum of the outlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 to the cross-sectional area of the air outlet 201, so that the ratio range of the two is within 0.1 to 0.25, and the sum of the outlet cross-sectional areas of the first air distribution channel 202 and the second air distribution channel 203 is smaller than the outlet cross-sectional area of the uniform flow air duct 204, it can make the first air distribution channel 202 and the second air distribution channel 203 form outlets that are relatively narrower than the uniform flow air duct 204.

[0126] It should be noted that a duct structure with an outlet larger than the inlet is formed in the first air distribution channel 202 and the second air distribution channel 203. When the air flow passes through the narrow channels, due to the reduction of the channel cross-sectional area, high-speed air flows are formed at the outlets of the first air distribution channel 202 and the second air distribution channel 203, and then a dense and high-speed inner air curtain is formed inside the air curtain, effectively isolating the diffusion of external hot air into the refrigerating compartment 101.

[0127] In some embodiments, the ratio of D3 / D4 can be greater than 0.1. When D3 / D4 is greater than 0.1, a relatively reasonable velocity difference can be formed among the first air distribution channel 202, the second air distribution channel 203, and the uniform flow air duct 204. When D3 / D4 is less than 0.1, the outlets of the first air distribution channel 202 and the second air distribution channel 203 are too small, and the resistance of the air flow during the flow through the first air distribution channel 202 and the second air distribution channel 203 is greater, thereby affecting the air flow velocity at the first air distribution channel 202 and the second air distribution channel 203.

[0128] In some embodiments, the ratio of D3 / D4 can be less than 0.25. When D3 / D4 is less than 0.25, a relatively reasonable velocity difference can be formed among the first air distribution channel 202, the second air distribution channel 203, and the flow equalizing air duct 204. When D3 / D4 is greater than 0.25, the outlets of the first air distribution channel 202 and the second air distribution channel 203 are relatively large, and the effect of accelerating and pressurizing the air flow in the first air distribution channel 202 and the second air distribution channel 203 is poor, thereby affecting the air flow velocity in the first air distribution channel 202 and the second air distribution channel 203.

[0129] As Figure 3 and Figure 6 shown, in some embodiments, the cross-sectional area of the inlet 301 of the first air distribution channel is larger than the cross-sectional area of the outlet of the first air distribution channel. The cross-sectional area of the inlet 302 of the second air distribution channel is larger than the cross-sectional area of the outlet of the first air distribution channel 203.

[0130] Specifically, setting the cross-sectional area of the inlet 301 of the first air distribution channel to be larger than the cross-sectional area of the outlet of the first air distribution channel enables the first air distribution channel to form a structure with a decreasing cross-sectional area from the inlet to the outlet. When the fluid passes through the first air distribution channel with a decreasing cross-sectional area, the flow velocity in the first air distribution channel will increase, thereby forming a situation where the air velocity at the air outlet 201 of the first air distribution channel is greater than the air velocity at the air outlet 201 of the outer flow equalizing air duct 204.

[0131] Setting the cross-sectional area of the inlet 302 of the second air distribution channel to be larger than the cross-sectional area of the outlet of the first air distribution channel 203 enables the first air distribution channel 203 to form a structure with a decreasing cross-sectional area from the inlet to the outlet. When the fluid passes through the first air distribution channel 203 with a decreasing cross-sectional area, the flow velocity in the first air distribution channel 203 will increase, thereby forming a situation where the air velocity at the air outlet 201 of the first air distribution channel 203 is greater than the air velocity at the air outlet 201 of the outer flow equalizing air duct 204.

[0132] As Figure 5 and Figure 9As shown, in some embodiments, the cross-sectional area of the inlet 302 of the second air distribution channel is larger than that of the inlet 301 of the first air distribution channel. In this way, by designing the inlet 302 of the second air distribution channel to be larger than the inlet 301 of the first air distribution channel, in the initial stage, more air flow can enter the first air distribution channel 203. Then, when passing through the channel with a gradually decreasing cross-sectional area, the air flow in the second air distribution channel will be further accelerated to a higher speed, thereby forming an air flow at the outlet of the first air distribution channel 203 greater than that at the outlet of the first air distribution channel, resulting in an air flow velocity distribution in the inner layer of the air curtain with the maximum air flow velocity in the inner layer, the medium air flow velocity in the middle layer, and the slowest air flow velocity in the outer layer. In this way, an air curtain wind speed distribution structure decreasing from the inner layer to the outer layer is formed, which can not only block the impact of the external hot and humid air on the low-temperature commodities in the cabinet through the relatively high-speed cold air flow in the inner layer, but also minimize the cold air spillage through the low-speed cold air in the outer layer, reducing energy consumption.

[0133] It should be noted that, through the above structural arrangement in the present application, a first air distribution channel with an air flow velocity intermediate between the first air distribution channel 203 and the uniform air flow channel 204 is formed, which can play a buffering role between the air flows in the outer layer and the inner layer of the air curtain, avoiding the formation of a turbulent flow phenomenon at the outlet due to the large difference in air flow velocity between the air flow in the first air distribution channel 203 in the inner layer and the air flow blown out from the outermost uniform air flow channel 204. This is beneficial to forming a stable air curtain structure on the front side of the refrigerating compartment 101, which can not only effectively isolate the external hot air, but also reduce the disordered diffusion of the cold air in the refrigerating compartment 101, further improving the heat preservation effect and reducing the energy consumption of the display cabinet.

[0134] As Figure 3 and Figure 7 As shown, in some embodiments, the rear side wall 212 of the air outlet part 21 may include a first guiding wall 2121 and a rear air outlet wall 2122. The upper end of the first guiding wall 2121 may be connected to the front end of the bottom wall 23 of the air outlet channel 2. The lower end of the first guiding wall 2121 may be connected to the upper end of the rear air outlet wall 2122. The rear air outlet wall 2122 may be arranged to extend downward, and the first guiding wall 2121 may be inclined towards the upper end of the rear air outlet wall 2122.

[0135] Among them, the first guiding wall 2121 is connected between the rear air outlet wall 2122 and the bottom wall 23 of the air outlet channel 2. The rear air outlet wall 2122 extends downward to form an air outlet 201 for blowing downward. The first guiding wall 2121 is inclined in the direction of the downward extension of the rear air outlet wall 2122, so that the bottom wall 23 of the air outlet channel 2 can extend obliquely towards the rear air outlet wall 2122 through the first guiding wall 2121.

[0136] Since the bottom wall 23 and the top wall 22 of the top air outlet channel 2 are arranged parallel to the horizontal direction or form a certain angle with the horizontal direction, and the air outlet 201 needs to blow downward and in the front side of the refrigerating compartment 101, the air flow direction flowing through the air outlet channel 2 to the air outlet 201 needs to change. During this process, a certain flow resistance is easily formed inside the air flow duct, and then the air flow in the innermost air duct is uneven, the air volume is small, and the flow rate is significantly slowed down.

[0137] As Figure 3 and Figure 7 shown, in this embodiment, the air flow at the bottom of the first air distribution channel 203 can flow smoothly along the inclined wall surface under the guiding action of the first guiding wall 2121 when passing through the first air distribution channel 203, reducing the resistance of the air flow when passing through the first air distribution channel 203, contributing to the smooth flow of the air flow, and reducing the noise and vibration generated by the wind resistance and the energy loss generated by the air flow disorder.

[0138] As Figure 3 and Figure 7 shown, in some embodiments, the first guiding wall 2121 can be arranged as an inclined wall connecting the bottom wall 23 of the air outlet channel 2 and the inclined wall of the rear air outlet wall 2122. In this way, the air flow flowing horizontally along the bottom wall 23 of the air outlet channel 2 can flow more smoothly towards the rear air outlet wall 2122 in the vertical direction through this inclined wall.

[0139] In some other embodiments, the first guiding wall 2121 can be arranged as an arc wall.

[0140] As Figure 3 and shown, in some embodiments, the second air distribution plate 32 can include a second guiding wall 231 and a second air outlet wall 232. The second guiding wall 231 is arranged at an interval above the front side of the first guiding wall 2121. The lower end of the second guiding wall 231 is connected to the upper end of the second air outlet wall 232. The second air outlet wall 232 extends downward. The second guiding wall 231 is inclined towards the upper end of the second air outlet wall 232. The lower end of the second air outlet wall 232 can enclose an outlet of the first air distribution channel 203 with the rear air outlet wall 2122. A part of the first air distribution channel 203 can be located between the rear side of the second guiding wall 231 and the front side of the first guiding wall 2121, so that the air flow in the first air distribution channel 203 flows downward along the first guiding wall 2121 and the second guiding wall 231 towards the air outlet 201.

[0141] Among them, by arranging the second guiding wall 231 at an interval above the front side of the first guiding wall 2121, an outlet of the first air distribution channel 203 is formed between the lower end of the second air outlet wall 232 and the second air outlet wall 232 arranged to extend downward. This allows the air flow in the first air distribution channel 203 to be more smoothly guided downward when passing through the channel between the second guiding wall 231 and the first guiding wall 2121, reducing the air resistance at the corner, and thus forming a stable-speed air flow at the outlet of the first air distribution channel 203.

[0142] It should be noted that the first air distribution channel 203 may include a second intermediate section 20221 and a second air outlet section 20222. The second intermediate section 20221 is formed between the rear side of the second guiding wall 231 and the front side of the first guiding wall 2121.

[0143] As Figure 7 shown, in some embodiments, the second guiding wall 231 may be arranged as an inclined wall. In this way, under the guiding action of the first guiding wall 2121 and the second guiding wall 231, the air flow flowing horizontally along the bottom wall 23 of the air outlet channel 2 can have less air resistance when flowing through the wind direction corner of the second intermediate section 20221, and then flow toward the rear air outlet wall 2122 in the vertical direction.

[0144] In some embodiments, the second guiding wall 231 may be arranged as an arc-shaped wall.

[0145] As Figure 3 and Figure 3 shown, in some embodiments, the second air distribution plate 32 may include a second air inlet wall 323. The lower end of the second air inlet wall 323 may be connected to the upper end of the second guiding wall 231, and an inlet 302 of the second air distribution channel may be formed between the upper end of the second air inlet wall 323 and the bottom wall 23 of the air outlet channel 2.

[0146] In this way, by defining the inlet 302 of the second air distribution channel between the upper end of the second air inlet wall 323 and the bottom wall 23 of the air outlet channel 2, the air flow in the air outlet channel 2 can be effectively guided by the second air inlet wall 323 and enter the first air distribution channel 203, thereby improving the smoothness of the air flow in the first air distribution channel 203, and the noise generated during the operation of the display cabinet will also be reduced accordingly.

[0147] As Figure 7 and Figure 3As shown, in some embodiments, the second air inlet wall 323 may be arranged in parallel with the bottom wall 23 of the air outlet passage 2. In this way, the air flow can maintain a relatively stable flow state in the front section of the second air distribution passage, and then flow downward toward the air outlet 201 under the guidance of the second guiding wall 231 and the first guiding wall 2121, reducing the phenomenon of air flow disorder or vortex generated by the diversion of the air flow at the inlet of the second air distribution plate 32, so that the air flow can enter and be distributed into the first air distribution passage 203 more smoothly.

[0148] As Figure 4 As shown, in some embodiments, the first air distribution plate 31 may be provided with a third guiding wall 311 and a first air outlet wall 312. The third guiding wall 311 may be arranged at intervals above the front side of the second guiding wall 231. The lower end of the third guiding wall 311 may be connected to the upper end of the first air outlet wall 312. The first air outlet wall 312 may extend downward. The third guiding wall 311 may be inclined toward the upper end of the first air outlet wall 312. The lower end of the first air outlet wall 312 and the lower end of the second air outlet wall 232 may enclose to form an outlet of the first air distribution passage. A part of the first air distribution passage may be located between the rear side of the third guiding wall 311 and the front side of the second guiding wall 231, so that the air flow in the first air distribution passage flows downward toward the air outlet 201 along the second guiding wall 231 and the third guiding wall 311.

[0149] Since the bottom wall 23 and the top wall 22 of the top air outlet passage 2 are arranged parallel to the horizontal direction or form a certain angle with the horizontal direction, and the air outlet 201 needs to blow downward and in the front side of the refrigerating compartment 101, the direction of the air flow flowing from the air outlet passage 2 to the air outlet 201 needs to change. During this process, a certain flow resistance is also likely to be formed inside the first air distribution passage, making it easy for uneven air flow, small air volume and significantly slower air flow velocity to occur inside the first air distribution passage.

[0150] Among them, by arranging the third guiding wall 311 at intervals above the front side of the second guiding wall 231, and forming an outlet of the first air distribution passage between the lower end of the third air outlet wall and the second guiding wall 231 extending downward, it can make the air flow in the first air distribution passage be guided downward more smoothly when passing through the passage between the second guiding wall 231 and the third guiding wall 311, reducing the wind resistance at the corner of the air flow, and further making the air flow at the outlet of the first air distribution passage have a stable speed.

[0151] It should be noted that the first air distribution passage may include a first intermediate section 20211 and a first air outlet section 20212. The first intermediate section 20211 is formed between the rear side of the third guiding wall 311 and the front side of the second guiding wall 231, and the first air outlet section 20212 is arranged close to the air outlet 201.

[0152] As shown Figure 7 In some embodiments, the third guiding wall 311 may be provided as an inclined wall. Thus, under the guiding action of the third guiding wall 311 and the second guiding wall 231, the airflow flowing horizontally along the bottom wall 23 of the air outlet passage 2 can have a smaller air resistance when flowing through the wind direction turning corner of the first intermediate section 20211, and then flow towards the first air outlet wall 312 in the vertical direction, forming a stable airflow at the outlet of the first air distribution passage.

[0153] In some embodiments, the third guiding wall 311 may be provided as an arc-shaped wall.

[0154] As shown Figure 7 and Figure 3 In some embodiments, the first air distribution plate 31 may include a first air inlet wall 313. The lower end of the first air inlet wall 313 may be connected to the upper end of the first guiding wall 2121. An inlet 301 of the first air distribution passage may be formed between the upper end of the first air inlet wall 313 and the upper end of the second air inlet wall 323.

[0155] In this way, by defining the inlet 301 of the first air distribution passage between the first air inlet wall 313 and the second air inlet wall 323, the airflow in the air outlet passage 2 can effectively enter the first air distribution passage under the guidance of the first air inlet wall 313 and the second air inlet wall 323, thereby improving the smoothness of the airflow in the first air distribution passage, and the noise generated during the operation of the display cabinet for blowing air will also be reduced accordingly.

[0156] As shown Figure 7 and Figure 3 In some embodiments, the first air inlet wall 313 may be arranged in parallel with the second air inlet wall 323. In this way, the airflow can maintain a relatively stable flow state in the front section of entering the first air distribution passage, and then flow towards the lower air outlet 201 under the guidance of the second guiding wall 231 and the third guiding wall 311, reducing the phenomenon of disorder or eddy current generated by the diversion of the airflow at the inlets of the first air distribution plate 31 and the second air distribution plate 32, so that the airflow can enter and be distributed into the first air distribution passage more smoothly.

[0157] As shown Figure 7 and Figure 8 In some embodiments, the ratio range of the cross-sectional area of the inlet 301 of the first air distribution passage to the cross-sectional area of the inlet 302 of the second air distribution passage may be 0.5 to 0.8.

[0158] Specifically, an inlet 301 of the first air distribution passage may be formed between the upper end of the first air inlet wall 313 and the upper end of the second air inlet wall 323, and an inlet 302 of the second air distribution passage may be formed between the upper end of the second air inlet wall 323 and the bottom wall 23 of the air outlet passage 2.

[0159] As shownFigure 9 As shown, denote the distance between the upper end of the first air inlet wall 313 and the upper end of the second air inlet wall 323 as D5, and the distance between the upper end of the second air inlet wall 323 and the bottom wall 23 of the air outlet channel 2 as D6. The ratio of D5 / D6 is 0.5 to 0.8. In this way, while the first air distribution channel 203 receives more air flow, when passing through the first air distribution channel 203 with a gradually decreasing cross-sectional area, the air flow in the second air distribution channel will be further accelerated to a higher speed, thereby forming an air flow with a greater speed relative to the first air distribution channel at the air outlet 201 of the first air distribution channel 203.

[0160] In some embodiments, the ratio of D5 / D6 can be greater than 0.5. When D5 / D6 is greater than 0.5, the air flow speed in the second air distribution channel 2022 can be greater than that in the first air distribution channel, and the air flow speed difference between the two can be within a suitable range. When D5 / D6 is less than 0.5, the air intake volume of the first air distribution channel is too small, and at the same time, the air flow pressure in the first air distribution channel is greater, making it difficult to form a reasonable air curtain air flow distribution structure with a decreasing air flow speed from the inside to the outside at the outlets of the first air distribution channel and the second air distribution channel 2022.

[0161] In some embodiments, the ratio of D5 / D6 can be less than 0.8. When D5 / D6 is less than 0.5, the air flow speed in the second air distribution channel 2022 can be greater than that in the first air distribution channel, and the air flow speed difference between the two can be within a suitable range. When D5 / D6 is greater than 0.5, the air intake volume of the first air distribution channel is too large, resulting in a too high air flow speed at the outlet of the first air distribution channel, which is not conducive to forming a reasonable air curtain air flow distribution structure with a decreasing air flow speed from the inside to the outside at the outlets of the first air distribution channel and the second air distribution channel 2022.

[0162] Figure 9 is Figure 10 a partial enlarged view of the D part in

[0163] As Figure 7 and Figure 7 shown, in some embodiments, a flow guiding part 213 can be formed on the front side of the air outlet part 21. The flow guiding part 213 can guide the gas flow in the uniform flow channel.

[0164] As Figure 10As shown, in some embodiments, the flow guiding portion may include a first flow guiding wall 2131, a second flow guiding wall 2132, and a third flow guiding wall 2133. The upper end of the first flow guiding wall 2131 may be connected to the top wall 22 of the air outlet passage 2. The lower end of the first flow guiding wall 2131 may be inclined downward and connected to the upper end of the second flow guiding wall 2132. The second flow guiding wall 2132 may be inclined downward toward the lower end and connected to the upper end of the third flow guiding wall 2133. The third flow guiding wall 2133 may be inclined toward the air outlet 201 and connected to the inner side wall of the air outlet 201. Thus, by sequentially inclining the first flow guiding wall 2131, the second flow guiding wall 2132, and the third flow guiding wall 2133, the airflow in the flow equalizing passage can be guided in sections, so that the airflow can flow more smoothly and stably from the horizontal direction toward the lower air outlet 201.

[0165] As Figure 7 and Figure 8 shown, in some embodiments, the angle formed between the second flow guiding wall 2132 and the plane where the air outlet 201 is located may be greater than the angle formed between the first flow guiding wall 2131 and the plane where the air outlet 201 is located. The angle formed between the second flow guiding wall 2132 and the plane where the air outlet 201 is located may be greater than the angle formed between the third flow guiding wall 2133 and the plane where the air outlet 201 is located.

[0166] As Figure 10 shown, denote the angle formed between the second flow guiding wall 2132 and the plane where the air outlet 201 is located as θ1, the angle formed between the first flow guiding wall 2131 and the plane where the air outlet 201 is located as θ2, and the angle formed between the third flow guiding wall 2133 and the plane where the air outlet 201 is located as θ3. θ1 is greater than θ2 and θ1 is greater than θ3. Thus, the second flow guiding wall 2132 with a larger inclination angle can be used to squeeze and guide the airflow in the flow equalizing passage, so that most of the airflow blows out from the inside and the middle of the flow equalizing member 4, and a small part blows out through the outside of the flow equalizing member 4. This can not only form an airflow with a decreasing air volume from the inside to the outside at the air outlet 201 of the flow equalizing passage, but also, under the squeezing action of the second flow guiding wall 2132, increase the inner layer air velocity at the air outlet of the flow equalizing passage and reduce the outer layer air velocity at the air outlet of the flow equalizing air duct 204, which is beneficial to forming a wind curtain with a large inner layer velocity and a small outer layer velocity, and the velocity of the wind curtain decreases smoothly from the inside to the outside.

[0167] In some embodiments, the included angle range formed between the second flow guiding wall 2132 and the plane where the air outlet 201 is located can be 60° to 80°. Thus, by designing the inclination angle of the second flow guiding wall 2132 and making the included angle range between it and the top of the air outlet passage 2 be 60° < θ1 < 80°, most of the air flow blows out from the inner side and the middle of the flow equalizing member 4, and a small part blows out through the outer side of the flow equalizing member 4, and an air flow distribution structure is formed in which the air curtain speed at the air outlet of the flow equalizing air duct 204 decreases smoothly from the inside to the outside.

[0168] In some embodiments, θ1 can be greater than 60°. When θ1 is greater than 60°, it is beneficial for the air flow to blow out from the inner side and the middle of the flow equalizing member 4, and a small part blows out through the outer side of the flow equalizing member 4. When θ1 is less than 60°, the inclination angle of the second flow guiding wall 2132 is too small, so that the squeezing effect of the second flow guiding wall 2132 on the air flow in the flow equalizing air duct 204 is not obvious, which easily leads to a larger air flow rate on the outer side of the outer flow equalizing air duct 204 and a smaller air flow rate on the inner side, which is not conducive to the outer air curtain isolating the external humid and hot air and affects the heat preservation effect of the air curtain.

[0169] In some embodiments, θ1 can be less than 80°. When θ1 is less than 80°, it is beneficial for the air flow to blow out from the inner side and the middle of the flow equalizing member 4, and a small part blows out through the outer side of the flow equalizing member 4. When θ1 is greater than 80°, the inclination angle of the second flow guiding wall 2132 is too large, so that the second flow guiding wall 2132 squeezes too much air flow inward, resulting in a very small air flow rate on the outer side of the outer flow equalizing air duct 204, which is not conducive to the outer air curtain isolating the external humid and hot air and affects the heat preservation effect of the air curtain.

[0170] As Figure 10 and Figure 8 Figure 9 shown, in some embodiments, the length range of the second flow guiding wall 2132 is 15 mm to 25 mm. Denote the distance between the upper and lower end points of the second flow guiding wall 2132 as D7. Thus, by designing the length D7 range of the second flow guiding wall 2132 to be 15 mm < D7 < 25 mm, it is beneficial for the air flow flowing out through the flow equalizing air duct 204 to be more distributed on the inner side and the middle of the flow equalizing member 4, and a small part is distributed on the outer side of the flow equalizing member 4, and an air flow distribution structure is formed in which the air curtain speed at the air outlet of the flow equalizing air duct 204 decreases smoothly from the inside to the outside.

[0171] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the scope of the present application is only limited by the appended claims.

Claims

1. A refrigeration device, characterized in that, Comprising: A box body, which forms a refrigerating compartment with an opening at the front side; An air outlet channel, which is arranged at the top of the refrigerating compartment. An air outlet part is arranged at the front end of the air outlet channel, and an air outlet opening communicating with the refrigerating compartment is formed at the bottom of the air outlet part; A first air distribution plate, which is arranged in the air outlet part and extends to the air outlet opening; A second air distribution plate, which is arranged in the air outlet part and extends to the air outlet opening; the first air distribution plate and the second air distribution plate are arranged at intervals front and back; The first air distribution plate and the second air distribution plate divide the interior of the air outlet part into a uniform flow air duct, a first air distribution channel and a second air distribution channel. The first air distribution channel is formed between the rear side of the first air distribution plate and the front side of the second air distribution plate. The second air distribution channel is formed between the rear side of the second air distribution plate and the rear side wall of the air outlet part. The uniform flow air duct is formed between the front side wall of the air outlet part and the front side of the first air distribution plate; A uniform flow member, which is arranged at the air outlet opening. The uniform flow member is located at the air outlet end of the uniform flow air duct and is used for uniformly blowing out the air flow at the air outlet end of the uniform flow air duct.

2. The refrigeration device according to claim 1, wherein The ratio range of the sum of the inlet cross-sectional areas of the first air distribution channel and the second air distribution channel to the cross-sectional area of the air outlet channel is 0.4 to 0.

6.

3. The refrigeration device according to claim 1, wherein The ratio range of the sum of the outlet cross-sectional areas of the first air distribution channel and the second air distribution channel to the cross-sectional area of the air outlet opening is 0.1 to 0.

25.

4. The refrigeration device according to claim 1, wherein The inlet cross-sectional area of the first air distribution channel is larger than the outlet cross-sectional area of the first air distribution channel; The inlet cross-sectional area of the second air distribution channel is larger than the outlet cross-sectional area of the second air distribution channel; The inlet cross-sectional area of the second air distribution channel is larger than the inlet cross-sectional area of the first air distribution channel.

5. The refrigeration device according to claim 4, wherein The ratio range of the inlet cross-sectional area of the first air distribution channel to the inlet cross-sectional area of the second air distribution channel is 0.5 to 0.

8.

6. The refrigeration device according to claim 4, wherein The rear side wall of the air outlet part comprises a first guiding wall and a rear air outlet wall. The upper end of the first guiding wall is connected to the front end of the bottom wall of the air outlet channel. The lower end of the first guiding wall is connected to the upper end of the rear air outlet wall. The rear air outlet wall extends downward. The first guiding wall is inclined towards the upper end of the rear air outlet wall; 7. The refrigeration device according to claim 6, wherein The second air distribution plate comprises a second guiding wall and a second air outlet wall. The second guiding wall is arranged at intervals above the front side of the first guiding wall. The lower end of the second guiding wall is connected to the upper end of the second air outlet wall. The second air outlet wall extends downward. The second guiding wall is inclined towards the upper end of the second air outlet wall; The lower end of the second air outlet wall and the rear air outlet wall enclose to form the outlet of the second air distribution channel; A part of the second air distribution channel is located between the rear side of the second guiding wall and the front side of the first guiding wall, so that the air flow in the second air distribution channel flows downward along the first guiding wall and the second guiding wall towards the air outlet.

8. The refrigeration device according to claim 7, wherein The first air distribution plate is provided with a third guiding wall and a first air outlet wall. The third guiding wall is spaced above the front side of the second guiding wall. The lower end of the third guiding wall is connected to the upper end of the first air outlet wall. The first air outlet wall extends downward. The third guiding wall is inclined towards the upper end of the first air outlet wall; An outlet of the first air distribution channel is formed by enclosing between the lower end of the first air outlet wall and the lower end of the second air outlet wall; A part of the first air distribution channel is located between the rear side of the third guiding wall and the front side of the second guiding wall, so that the air flow in the first air distribution channel flows downward along the second guiding wall and the third guiding wall towards the air outlet.

9. The refrigeration device according to claim 8, wherein The second air distribution plate includes a second air inlet wall. The lower end of the second air inlet wall is connected to the upper end of the second guiding wall. An inlet of the second air distribution channel is formed between the upper end of the second air inlet wall and the bottom wall of the air outlet channel.

10. The refrigeration device according to claim 9, wherein The first air distribution plate includes a first air inlet wall. The lower end of the first air inlet wall is connected to the upper end of the first guiding wall. An inlet of the first air distribution channel is formed between the upper end of the first air inlet wall and the upper end of the second air inlet wall.

11. The refrigeration device according to claim 7, wherein A guiding part is formed on the front side of the air outlet part. The guiding part includes a first guiding wall, a second guiding wall and a third guiding wall. The upper end of the first guiding wall is connected to the top wall of the air outlet channel. The lower end of the first guiding wall is inclined downward and connected to the upper end of the second guiding wall. The lower end of the second guiding wall is inclined downward and connected to the upper end of the third guiding wall. The third guiding wall is inclined towards the air outlet and connected to the inner side wall of the air outlet; An included angle formed between the second guiding wall and the plane where the air outlet is located is greater than an included angle formed between the first guiding wall and the plane where the air outlet is located; An included angle formed between the second guiding wall and the plane where the air outlet is located is greater than an included angle formed between the third guiding wall and the plane where the air outlet is located.

12. The refrigeration device according to claim 11, characterized in that, The included angle formed between the second guiding wall and the plane where the air outlet is located ranges from 60° to 80°.

13. The refrigeration device according to claim 11, characterized in that, The length of the second guiding wall ranges from 15 mm to 25 mm.

14. The refrigeration device according to claim 1, wherein It further includes a condensation air duct and a return air duct; The condensation air duct is arranged at the back side of the refrigerating compartment, the return air duct is arranged at the bottom of the refrigerating compartment, the top end of the condensation air duct is the air outlet end and is connected to the rear end of the air outlet channel, the bottom end of the condensation air duct is the air inlet end and is connected to the rear end of the return air duct, a return air opening is arranged at the front end of the return air duct, and the return air opening is communicated with the bottom area of the refrigerating compartment; The air outlet and the return air opening are arranged opposite to each other vertically, and the return air opening is arranged below the air outlet.

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