Double-temperature air curtain cabinet

Abstract

The utility model relates to the technical field of refrigeration equipment, in particular to a double-temperature air curtain cabinet. The double-temperature air curtain cabinet comprises a cabinet body and an outer air duct assembly, the cabinet body is provided with a storage cavity and an inner air duct which are arranged in the front-back direction, the rear wall of the cabinet body is provided with an air passing opening communicated with the storage cavity, the inner air duct is used for conveying cold air to the storage cavity, and the outer air duct assembly is detachably and fixedly connected with the rear wall. The outer air duct assembly is provided with an outer air duct, an air inlet, an air outlet and a notch, the air inlet, the air outlet and the notch all communicate with the outer air duct, the air outlet is opposite to and communicates with the air passing opening, a heater is installed on the rear wall and penetrates through the notch to stretch into the outer air duct, and the outer air duct is used for conveying hot air to the storage cavity. The outer air duct assembly of the double-temperature air curtain cabinet can serve as a part to be assembled and then assembled on the cabinet body, the heater extends into the outer air duct to heat the outer air duct, electric parts such as the heater do not need to be assembled on the outer air duct assembly, therefore, a connecting wire does not need to be arranged for taking electricity, the structure is simple, and assembling is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration equipment, in particular to a dual-temperature air curtain cabinet. Background Art

[0002] The cabinet body of the existing dual-temperature air curtain cabinet includes a storage cavity, a first inner rear wall, a second inner rear wall, a first outer rear wall and a second outer rear wall which are arranged in sequence along the front-to-back direction, and a thermal insulation material is filled between the second inner rear wall and the first outer rear wall. The first inner rear wall and the second inner rear wall are arranged relatively spaced apart to form an inner air duct therebetween, and the first outer rear wall and the second outer rear wall are arranged relatively spaced apart to form an outer air duct therebetween. In order to keep warm and save energy, an insulation layer is also fixed to the outer surface of the second outer rear wall. In this way, a storage cavity, an inner air duct, an insulation layer, an outer air duct and an insulation layer which are arranged in sequence along the front-to-back direction are formed, wherein electrical components such as air valves and heating components are also provided in the outer air duct. This air duct structure has many parts, a complex structure and poor assemblability. Utility Model Content

[0003] The utility model aims to provide a dual-temperature air curtain cabinet, which has a simple structure and is easy to assemble.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] A dual-temperature air curtain cabinet comprises a cabinet body and an external air duct assembly, the cabinet body is provided with a storage cavity and an internal air duct arranged in a front-to-back direction, the rear wall of the cabinet body is provided with an air outlet connected to the storage cavity, and the internal air duct is used to convey cold air to the storage cavity; the external air duct assembly is detachably fixedly connected to the rear wall, the external air duct assembly is provided with an external air duct, an air inlet, an air outlet and a notch, the air inlet, the air outlet and the notch are all connected to the external air duct, and the air outlet is opposite to and connected to the air outlet; a heater is installed on the rear wall, the heater extends into the external air duct through the notch, and the external air duct is used to convey hot air to the storage cavity.

[0006] As an optional solution, one of the external air duct assembly and the rear wall is provided with a plurality of hooks, and the other of the two is provided with a plurality of card slots, the number of the plurality of hooks is equal to the number of the plurality of card slots and the positions are arranged in a one-to-one correspondence, and each of the hooks is connected to the corresponding card slot.

[0007] As an optional solution, the cabinet body further includes a top wall, the external air duct assembly includes a top plate, and the dual-temperature air curtain cabinet further includes a connecting plate, and the connecting plate is fixedly connected to both the top wall and the top plate.

[0008] As an optional solution, the cabinet body also includes a first inner wall and a second inner wall, the first inner wall, the second inner wall and the rear wall are arranged in parallel and spaced apart along the front-to-back direction, the inner air duct is formed between the first inner wall and the second inner wall, and the space between the second inner wall and the rear wall is filled with thermal insulation material; the external air duct assembly includes an insulation plate and a back plate, the external air duct is formed between the insulation plate and the back plate, the back plate is fitted with the rear wall, and the air inlet, the notch and the air outlet are all opened on the back plate.

[0009] As an optional solution, the insulation board is provided with a maintenance port, which is opposite to the notch; the external air duct assembly also includes a blocking piece, which is detachably plugged into the maintenance port and is used to block the maintenance port.

[0010] As an optional solution, the external air duct assembly also includes a wind shield, which is connected between the back plate and the insulation plate, and is arranged adjacent to the air outlet, and the air inlet, the notch, the air outlet and the wind shield are arranged from bottom to top.

[0011] As an optional solution, the cabinet body is also provided with a cold air duct and a hot air duct located below the storage cavity and arranged in the up and down directions, the cold air duct is connected to the inner air duct, and the hot air duct is connected to the air inlet; the dual-temperature air curtain cabinet also includes a refrigeration unit, the evaporator and evaporator fan of the refrigeration unit are arranged in the cold air duct and / or the inner air duct, and the condenser and condenser fan of the refrigeration unit are arranged in the hot air duct.

[0012] As an optional solution, a wind valve is also installed on the rear wall, which extends into the external air duct and is located between the air inlet and the air outlet, and is used to block or clear the external air duct; a shutter is embedded on the insulation board, and the shutter is arranged opposite to the air inlet.

[0013] As an optional solution, the dual-temperature air curtain cabinet also includes a support frame and a partition plate, wherein the support frame is fixedly installed in the storage cavity for supporting items; the partition plate is slidably connected to the support frame, and the partition plate can be extended and retracted relative to the support frame, and when the partition plate is extended relative to the support frame, the partition plate extends into the inner air duct and divides the inner air duct into an upper inner air duct and a lower inner air duct, and when the partition plate is retracted relative to the support frame, the partition plate withdraws from the inner air duct; the air outlet is connected to the upper inner air duct, and the evaporator and the evaporator fan are arranged in the lower inner air duct and / or the cold air duct.

[0014] As an optional solution, a temperature sensor is also installed on the rear wall, and the temperature sensor is opposite to the notch and is used to detect the temperature in the external air duct.

[0015] Beneficial effects of the utility model:

[0016] The utility model provides a dual-temperature air curtain cabinet, which comprises a cabinet body and an external air duct assembly, wherein the cabinet body is provided with a storage cavity and an internal air duct arranged along the front-to-back direction, the rear wall of the cabinet body is provided with an air outlet communicated with the storage cavity, the internal air duct is used to convey cold air to the storage cavity, the external air duct assembly is detachably fixedly connected to the rear wall, the external air duct assembly is provided with an external air duct, an air inlet, an air outlet and a notch, the air inlet, the air outlet and the notch are all communicated with the external air duct, the air outlet is opposite to and communicated with the air outlet, a heater is installed on the rear wall, the heater extends into the external air duct through the notch, and the external air duct is used to convey hot air to the storage cavity. The dual-temperature air curtain cabinet provided by the utility model has an external air duct component and a cabinet body that are detachably connected. When the external air duct component is assembled on the cabinet body, the heater extends into the external air duct to heat the external air duct, so that the external air duct component can be assembled as a component and then assembled on the cabinet body. There is no need to assemble electrical components such as a heater on the external air duct component, so there is no need to set up connecting lines for power supply. The structure is simple and easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a dual-temperature air curtain cabinet provided by an embodiment of the utility model;

[0018] Figure 2 This is a structural cross-sectional view of a dual-temperature air curtain cabinet provided by an embodiment of the utility model;

[0019] Figure 3 It is a structural schematic diagram of an external air duct assembly of a dual-temperature air curtain cabinet provided in an embodiment of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of a dual-temperature air curtain cabinet provided by an embodiment of the utility model;

[0021] Figure 5 This is a structural exploded view of a dual-temperature air curtain cabinet provided by an embodiment of the utility model;

[0022] Figure 6 This is a structural exploded view of the external air duct assembly of the dual-temperature air curtain cabinet provided in an embodiment of the utility model;

[0023] Figure 7 It is a structural cross-sectional view of an external air duct assembly of a dual-temperature air curtain cabinet provided in an embodiment of the utility model.

[0024] In the figure:

[0025] 1-cabinet; 11-rear wall; 110-heater; 111-air outlet; 112-card slot; 12-top wall; 121-second fixing hole; 13-first inner wall; 14-second inner wall; 15-storage cavity; 16-inner air duct; 161-upper inner air duct; 162-lower inner air duct; 17-cold air duct; 171-cold air duct inlet; 18-hot air duct; 181-hot air duct inlet; 19-insulation material; 2-external air duct assembly; 21-top plate; 211-first fixing hole; 22-insulation board; 221-outer shell; 222-inner shell; 223-insulation layer; 224-maintenance port; 225-shutter; 226-hook; 23-back panel; 231-air inlet; 232-air outlet; 233-gap; 24-blocking piece; 25-wind shield; 26-external air duct; 3-connecting plate; 31-first through hole; 32-second through hole; 4-refrigeration unit; 41-evaporator; 42-evaporator fan; 43-condenser; 44-condenser fan; 45-compressor; 5-air valve; 6-support frame; 7-partition plate; 8-temperature sensor; 9-first screw; 10-second screw. DETAILED DESCRIPTION

[0026] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] like Figure 1 to Figure 7 As shown, the present embodiment provides a dual-temperature air curtain cabinet, which includes a cabinet body 1 and an external air duct assembly 2, wherein the cabinet body 1 is provided with a storage cavity 15 and an internal air duct 16 arranged along the front-to-back direction, the rear wall 11 of the cabinet body 1 is provided with an air outlet 111 connected to the storage cavity 15, the internal air duct 16 is used to convey cold air to the storage cavity 15, the external air duct assembly 2 is detachably fixedly connected to the rear wall 11, the external air duct assembly 2 is provided with an external air duct 26, an air inlet 231, an air outlet 232 and a notch 233, the air inlet 231, the air outlet 232 and the notch 233 are all connected to the external air duct 26, the air outlet 232 is opposite to and connected to the air outlet 111, a heater 110 is installed on the rear wall 11, the heater 110 extends into the external air duct 26 through the notch 233, and the external air duct 26 is used to convey hot air to the storage cavity 15.

[0031] In the dual-temperature air curtain cabinet provided in the embodiment of the utility model, since the external air duct component 2 is detachably connected to the cabinet body 1, when the external air duct component 2 is assembled on the cabinet body 1, the heater 110 extends into the external air duct 26 to heat the external air duct 26. Therefore, the external air duct component 2 of the dual-temperature air curtain cabinet provided in this embodiment can be assembled as a component and then assembled on the cabinet body 1. There is no need to assemble electrical components such as the heater 110 on the external air duct component 2. Therefore, there is no need to set up connecting lines for power supply. The structure is simple and easy to assemble.

[0032] Optionally, the heater 110 may be a PTC heater, or an electric heating wire. The heater 110 heats the air in the external air duct 26. A fan (not shown in the figure) is also installed on the rear wall 11 of the cabinet 1. The fan extends into the external air duct 26 through the notch 233 on the external air duct assembly 2. The operation of the fan enables the hot air in the external air duct 26 to pass through the air outlet 232 and the air outlet 111 and blow into the storage cavity 15, thereby promoting the circulation of hot air. Optionally, an intermediate channel (not shown in the figure) is also provided in the cabinet 1. The intermediate channel runs through the internal air duct 16 and connects the air outlet 111 and the storage cavity 15, thereby providing guidance for the hot air generated in the external air duct 26 to flow to the storage cavity 15.

[0033] Alternatively, if Figure 3 to Figure 5As shown, one of the external air duct assembly 2 and the rear wall 11 is provided with a plurality of hooks 226, and the other of the two is provided with a plurality of slots 112, and the number of the plurality of hooks 226 and the plurality of slots 112 are equal and the positions are arranged one by one, and each hook 226 is hooked with the corresponding slot 112. The above arrangement realizes the detachable fixed connection between the external air duct assembly 2 and the rear wall 11. Optionally, in this embodiment, the plurality of hooks 226 are arranged in two rows in the left and right directions at intervals on the external air duct assembly 2, and the plurality of slots 112 are correspondingly arranged on the rear wall 11 of the cabinet 1, and the plurality of hooks 226 are hooked with the plurality of slots 112 one by one. Optionally, the length of the slot 112 in the up and down direction is greater than the length of the hook 226. When installing, the external air duct assembly 2 is moved from back to front to insert the plurality of hooks 226 into the slot 112, and then the external air duct assembly 2 is hung on the slot 112 under the action of its own weight, and the installation is simple and convenient. Optionally, in other embodiments, a plurality of hooks 226 may be arranged in two rows on the rear wall 11 of the cabinet 1 at intervals along the left-right direction, and a plurality of slots 112 may be correspondingly arranged on the external air duct assembly 2 .

[0034] like Figure 2 and Figure 5 As shown, the cabinet 1 further includes a top wall 12, the external air duct assembly 2 includes a top plate 21, and the dual-temperature air curtain cabinet further includes a connecting plate 3, which is fixedly connected to both the top wall 12 and the top plate 21. By providing the connecting plate 3 and connecting the connecting plate 3 between the top wall 12 and the top plate 21, not only the connection strength between the external air duct assembly 2 and the cabinet 1 is increased, but also the gap between the external air duct assembly 2 and the cabinet 1 is shielded to prevent rainwater and dust from entering. Specifically, the top plate 21 is provided with a plurality of first fixing holes 211, the top wall 12 is provided with a plurality of second fixing holes 121, the connecting plate 3 is provided with a plurality of first through holes 31 and a plurality of second through holes 32, the dual temperature air curtain cabinet further comprises a plurality of first screws 9 and a plurality of second screws 10, the plurality of first screws 9, the plurality of first through holes 31 and the plurality of first fixing holes 211 are arranged in a one-to-one correspondence, the plurality of second screws 10, the plurality of second through holes 32 and the plurality of second fixing holes 121 are arranged in a one-to-one correspondence, each first screw 9 passes through the corresponding first through hole 31 and is threadedly connected to the first fixing hole 211, and each second screw 10 passes through the corresponding second through hole 32 and is threadedly connected to the second fixing hole 121. The detachable fixed connection between the connecting plate 3 and the corresponding part is realized by setting screws, so that the installation is convenient and the connection is reliable.

[0035] In this embodiment, if Figure 2As shown, the cabinet 1 further includes a first inner wall 13 and a second inner wall 14, wherein the first inner wall 13, the second inner wall 14 and the rear wall 11 are arranged in parallel and spaced apart in the front-to-back direction, an inner air duct 16 is formed between the first inner wall 13 and the second inner wall 14, and a heat-insulating material 19 is filled between the second inner wall 14 and the rear wall 11, and the outer air duct assembly 2 includes a heat-insulating plate 22 and a back plate 23, an outer air duct 26 is formed between the heat-insulating plate 22 and the back plate 23, the back plate 23 is fitted with the rear wall 11, and an air inlet 231, a notch 233 and an air outlet 232 are all provided on the back plate 23. The above arrangement enables the inner air duct 16 and the outer air duct 26 to be separated by the heat-insulating material 19, thereby avoiding heat exchange between the cold air in the inner air duct 16 and the hot air in the outer air duct 26, ensuring the stability of the cold air in the inner air duct 16, and also ensuring the stability of the hot air in the outer air duct 26. Specifically, a plurality of vents (not shown) are provided on the first inner wall 13, and the plurality of vents connect the inner air duct 16 and the storage chamber 15. It should be noted that, in this embodiment, the hooks 226 are arranged on the insulation board 22 in two rows at intervals along the left-right direction.

[0036] Optionally, in this embodiment, if Figure 2 , Figure 6 and Figure 7 As shown, the insulation board 22 is provided with a maintenance port 224, and the maintenance port 224 is opposite to the notch 233. The external air duct assembly 2 also includes a plugging member 24, and the plugging member 24 is detachably plugged with the maintenance port 224, and the plugging member 24 is used to plug the maintenance port 224. The above arrangement enables the heater 110 to be maintained when the plugging member 24 is removed, thereby improving the maintainability of the dual-temperature air curtain cabinet. After the maintenance of the heater 110 is completed, the plugging member 24 can be re-blocked to the maintenance port 224, thereby ensuring the sealing effect of the external air duct 26.

[0037] Alternatively, if Figure 6 and Figure 7 As shown, the insulation board 22 is a box-like structure with an opening, and the back plate 23 covers the opening of the box-like structure, and an external air duct 26 is formed between the insulation board 22 and the back plate 23. In addition, in the present embodiment, the top plate 21 is located on the top of the insulation board 22. Specifically, the insulation board 22 includes an outer shell 221, an inner shell 222, and an insulation layer 223 located between the outer shell 221 and the inner shell 222, and the maintenance port 224 passes through the outer shell 221, the insulation layer 223 and the inner shell 222. The structural design of the above-mentioned insulation board 22 further ensures the insulation effect of the hot air in the external air duct 26. It should be noted that the material of the insulation layer 223 may be the same as or different from the insulation material 19 filled between the second inner wall 14 and the rear wall 11.

[0038] like Figure 2 , Figure 6 and Figure 7As shown, the outer air duct assembly 2 further includes a windshield 25, which is connected between the back plate 23 and the inner shell 222 of the heat preservation plate 22, and the windshield 25 is arranged adjacent to the air outlet 232, and the air inlet 231, the notch 233, the air outlet 232 and the windshield 25 are arranged from bottom to top. The windshield 25 can guide the hot air in the outer air duct 26 to flow out from the air outlet 232 more quickly.

[0039] like Figure 2 As shown, the cabinet 1 is further provided with a cold air duct 17 and a hot air duct 18 located below the storage cavity 15 and arranged in the up-down direction, the cold air duct 17 is connected with the inner air duct 16, and the hot air duct 18 is connected with the air inlet 231, and the dual-temperature air curtain cabinet also includes a refrigeration unit 4, the evaporator 41 and the evaporator fan 42 of the refrigeration unit 4 are arranged in the cold air duct 17 and / or the inner air duct 16, and the condenser 43 and the condenser fan 44 of the refrigeration unit 4 are arranged in the hot air duct 18. When the evaporator fan 42 is working, the cold air generated by the evaporator 41 can be blown into the storage cavity 15 through the cold air duct 17, the inner air duct 16 and the vents in sequence; when the condenser fan 44 and the fan in the outer air duct 26 are working, the hot air can be blown into the storage cavity 15 through the hot air duct 18, the outer air duct 26, the air outlet 111 and the middle channel running through the inner air duct 16 in sequence. In this embodiment, the temperature of the hot air in the hot air passage 18 and the outer air passage 26 is further increased by the condensation heat of the condenser 43. It should be noted that in this embodiment, the compressor 45 of the refrigeration unit 4 is also arranged in the hot air passage 18.

[0040] Alternatively, if Figure 2As shown, a wind valve 5 is also installed on the rear wall 11. The wind valve 5 extends into the external air duct 26 and is located between the air inlet 231 and the air outlet 232. The wind valve 5 is used to block or clear the external air duct 26. A shutter 225 is embedded in the insulation board 22. The shutter 225 is arranged opposite to the air inlet 231. In the up and down direction, the wind valve 5 is located above the shutter 225. The shutter 225 has an open state and a closed state. When the wind valve 5 blocks the external air duct 26, the air inlet 231 is separated from the air outlet 232, and the shutter 225 is in the open state, no air flows through the external air duct 26, and the hot air blown out by the condenser fan 44 in the hot air duct 18 is directly blown to the outside through the air inlet 231 and the shutter 225; when the wind valve 5 clears the external air duct 26, the air inlet 231 is blocked from the air outlet 232, and the shutter 225 is in the open state, no air flows through the external air duct 26, and the hot air blown out by the condenser fan 44 in the hot air duct 18 is directly blown to the outside through the air inlet 231 and the shutter 225; The air inlet 231 is connected to the air outlet 232. When the shutter 225 is in a closed state, the hot air blown out by the condenser fan 44 in the hot air duct 18 enters the outer air duct 26 through the air inlet 231 and is then sent to the storage chamber 15 through the air outlet 232. Therefore, the dual-temperature air curtain cabinet provided in this embodiment also has a full cooling mode. At this time, the hot air is blown to the outside through the shutter 225, and the cold air is blown to the storage chamber 15 through the inner air duct 16, so as to cool the entire storage chamber 15. In this embodiment, the air valve 5 extends from the air inlet 231 into the outer air duct 26, and the air valve 5 is arranged adjacent to the upper edge of the air inlet 231. In other embodiments, the air valve 5 extends from the notch 233 opened on the back plate 23 into the outer air duct 26, and is arranged adjacent to the lower edge of the notch 233.

[0041] Optionally, in this embodiment, if Figure 2 As shown, the dual-temperature air curtain cabinet also includes a support frame 6 and a partition plate 7, wherein the support frame 6 is fixedly installed in the storage cavity 15 for supporting items, the partition plate 7 is slidably connected to the support frame 6, the partition plate 7 can be extended and retracted relative to the support frame 6, and when the partition plate 7 is extended relative to the support frame 6, the partition plate 7 extends into the inner air duct 16 and divides the inner air duct 16 into an upper inner air duct 161 and a lower inner air duct 162, when the partition plate 7 is retracted relative to the support frame 6, the partition plate 7 withdraws from the inner air duct 16, the air outlet 111 is connected to the upper inner air duct 161, and the evaporator 41 and the evaporator fan 42 are arranged in the lower inner air duct 162 and / or the cold air duct 17.

[0042] In this embodiment, if Figure 1 and Figure 2As shown, a cold air duct inlet 171 communicating with the cold air duct 17 is formed on the bottom wall of the storage cavity 15 , and a hot air duct inlet 181 communicating with the hot air duct 18 is formed on the outer wall of the front side of the cabinet 1 . When the dual-temperature air curtain cabinet adopts the full cooling mode, at this time, the air valve 5 blocks the external air duct 26, so that the air inlet 231 is separated from the air outlet 232, and the fans in the heater 110 and the external air duct 26 are both in the shutdown state. When the shutter 225 is in the open state, no airflow passes through the external air duct 26, and the partition plate 7 is retracted relative to the support frame 6. At this time, the air in the external environment enters the hot air duct 18 through the hot air duct air inlet 181 under the action of the condenser fan 44, and the condensation heat generated by the condenser 43 is directly blown to the outside through the shutter 225, and the air in the storage chamber 15 enters the cold air duct 17 through the cold air duct air inlet 171 under the action of the evaporator fan 42. The air is cooled by the evaporator 41 to form cold wind, so that the cold wind is blown to the entire storage chamber 15 by the upper internal air duct 161 and the lower internal air duct 162. When the dual-temperature air curtain cabinet is operated in the dual-temperature mode, the air valve 5 clears the external air duct 26, so that the air inlet 231 is connected to the air outlet 232, the heater 110 and the fans in the external air duct 26 are both in working state, and the shutter 225 is in a closed state, and the partition plate 7 extends into the internal air duct 16 and divides the internal air duct 16 into an upper internal air duct 161 and a lower internal air duct 162. At this time, the storage cavity 15 above the partition plate 7 forms a hot zone, and the storage cavity 15 below the partition plate 7 forms a cold zone. The air in the external environment is cooled by the condenser fan 44 through the hot air duct inlet 1 81 enters the hot air duct 18, is primarily heated by the condenser 43 in the hot air duct 18, and then enters the external air duct 26 through the air inlet 231 under the action of the fan in the external air duct 26, is secondary heated by the heater 110 in the external air duct 26, and is blown into the hot zone of the storage chamber 15 through the air outlet 111 and the upper internal air duct 161, while the air in the storage chamber 15 enters the cold air duct 17 through the cold air duct inlet 171 under the action of the evaporator fan 42, and is cooled by the evaporator 41 to form cold air, so that the cold air is blown from the lower internal air duct 162 to the cold zone of the storage chamber 15.

[0043] In this embodiment, the dual temperature air curtain cabinet includes a plurality of support frames 6, which are arranged at intervals in the up-down direction in the storage chamber 15, and the partition plate 7 is slidably connected to a set of the support frames 6 among the plurality of support frames 6. In this embodiment, the evaporator 42 is located in the lower inner air duct 162 of the inner air duct 16, and the evaporator fan 41 is located in the cold air duct 17.

[0044] Optionally, in other embodiments, an air valve 5 is further provided in the inner air duct 16, and the air valve 5 is used to separate the inner air duct 16 into an upper inner air duct 161 and a lower inner air duct 162 arranged in the up-down direction.

[0045] Optionally, in this embodiment, if Figure 5 As shown, a temperature sensor 8 is installed on the rear wall 11, the temperature sensor 8 is opposite to the notch 233, and the temperature sensor 8 is used to detect the temperature in the external air duct 26. By arranging the temperature sensor 8 on the rear wall 11 of the cabinet 1 instead of in the external air duct 26, not only can the temperature in the external air duct 26 be detected, but also the structure of the external air duct assembly 2 is further simplified.

[0046] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A dual temperature air curtain cabinet, characterized in that: The cabinet (1) comprises a cabinet body (1) and an external air duct assembly (2), wherein the cabinet body (1) is provided with a storage cavity (15) and an internal air duct (16) arranged in a front-to-rear direction, a rear wall (11) of the cabinet body (1) is provided with an air outlet (111) communicating with the storage cavity (15), and the internal air duct (16) is used to transport cold air to the storage cavity (15); The external air duct assembly (2) is detachably fixedly connected to the rear wall (11); the external air duct assembly (2) is provided with an external air duct (26), an air inlet (231), an air outlet (232) and a notch (233); the air inlet (231), the air outlet (232) and the notch (233) are all in communication with the external air duct (26); the air outlet (232) is opposite to and in communication with the air outlet (111); A heater (110) is installed on the rear wall (11); the heater (110) passes through the notch (233) and extends into the external air duct (26); the external air duct (26) is used to transport hot air to the storage cavity (15).

2. The dual temperature air curtain cabinet according to claim 1, characterized in that: One of the external air duct assembly (2) and the rear wall (11) is provided with a plurality of hooks (226), and the other of the two is provided with a plurality of card slots (112); the number of the plurality of hooks (226) is equal to the number of the plurality of card slots (112), and the positions are arranged in a one-to-one correspondence, and each of the hooks (226) is connected to a corresponding card slot (112).

3. The dual temperature air curtain cabinet according to claim 2, characterized in that: The cabinet body (1) further comprises a top wall (12), the external air duct assembly (2) comprises a top plate (21), and the dual-temperature air curtain cabinet further comprises a connecting plate (3), wherein the connecting plate (3) is fixedly connected to both the top wall (12) and the top plate (21).

4. The dual temperature air curtain cabinet according to claim 1, characterized in that: The cabinet (1) further comprises a first inner wall (13) and a second inner wall (14); the first inner wall (13), the second inner wall (14) and the rear wall (11) are arranged in parallel and spaced apart along the front-to-rear direction; the inner air duct (16) is formed between the first inner wall (13) and the second inner wall (14); and a heat-insulating material (19) is filled between the second inner wall (14) and the rear wall (11); The external air duct assembly (2) comprises a heat preservation plate (22) and a back plate (23), the external air duct (26) being formed between the heat preservation plate (22) and the back plate (23), the back plate (23) being in contact with the rear wall (11), and the air inlet (231), the notch (233) and the air outlet (232) are all provided on the back plate (23).

5. The dual temperature air curtain cabinet according to claim 4, characterized in that: The insulation board (22) is provided with a maintenance port (224), and the maintenance port (224) is opposite to the notch (233); The external air duct assembly (2) further comprises a blocking piece (24), the blocking piece (24) being detachably plugged into the maintenance port (224), and the blocking piece (24) being used to block the maintenance port (224).

6. The dual temperature air curtain cabinet according to claim 4, characterized in that: The external air duct assembly (2) further comprises a wind shield (25), wherein the wind shield (25) is connected between the back plate (23) and the heat insulation plate (22), the wind shield (25) is arranged adjacent to the air outlet (232), and the air inlet (231), the notch (233), the air outlet (232) and the wind shield (25) are arranged from bottom to top.

7. The dual temperature air curtain cabinet according to claim 4, characterized in that: The cabinet (1) is further provided with a cold air duct (17) and a hot air duct (18) located below the storage cavity (15) and arranged in the up-down direction, the cold air duct (17) being connected to the inner air duct (16), and the hot air duct (18) being connected to the air inlet (231); The dual-temperature air curtain cabinet also includes a refrigeration unit (4), the evaporator (41) and the evaporator fan (42) of the refrigeration unit (4) are arranged in the cold air duct (17) and / or the inner air duct (16), and the condenser (43) and the condenser fan (44) of the refrigeration unit (4) are arranged in the hot air duct (18).

8. The dual temperature air curtain cabinet according to claim 7, characterized in that: The rear wall (11) is also provided with an air valve (5), the air valve (5) extending into the external air duct (26) and being located between the air inlet (231) and the air outlet (232), the air valve (5) being used to block or clear the external air duct (26); The insulation board (22) is embedded with a shutter (225), and the shutter (225) is arranged opposite to the air inlet (231).

9. The dual temperature air curtain cabinet according to claim 7, characterized in that: The dual-temperature air curtain cabinet further comprises a support frame (6) and a partition plate (7); the support frame (6) is fixedly installed in the storage cavity (15) and is used to support articles; The partition plate (7) is slidably connected to the support frame (6); the partition plate (7) can be extended and retracted relative to the support frame (6); and when the partition plate (7) is extended relative to the support frame (6), the partition plate (7) extends into the inner air duct (16) and divides the inner air duct (16) into an upper inner air duct (161) and a lower inner air duct (162); and when the partition plate (7) is retracted relative to the support frame (6), the partition plate (7) exits the inner air duct (16); The air outlet (111) is in communication with the upper inner air duct (161), and the evaporator (41) and the evaporator fan (42) are arranged in the lower inner air duct (162) and / or the cold air duct (17).

10. The dual temperature air curtain cabinet according to any one of claims 1 to 9, characterized in that: A temperature sensor (8) is also installed on the rear wall (11), and the temperature sensor (8) is opposite to the notch (233) and is used to detect the temperature in the external air duct (26).

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