Display cabinet

Abstract

The utility model relates to the technical field of storage, in particular to a display cabinet. The display cabinet comprises a cabinet body and a refrigerating system, the cabinet body comprises a storage cavity, an equipment cavity, a cold air duct and a hot air duct, the storage cavity comprises a hot area and a cold area, the hot air duct comprises a middle air duct and side air ducts, an upper end opening of the middle air duct communicates with the hot area through an air inlet duct, and a lower end opening of the middle air duct communicates with the equipment cavity; a heater, a fan and a lower air door are sequentially arranged in the middle air duct from top to bottom, the lower air door is used for closing or opening a lower end opening of the middle air duct, the side air duct is communicated with the hot area through an air return duct, and a side air opening and a side air door used for closing or opening the side air opening are arranged between the side air duct and the middle air duct. The side air door is located between the fan and the lower air door, and the refrigerating system is installed in the equipment cavity. When the display cabinet is in a heating and normal temperature coexistence mode, the lower air door closes the lower end opening of the middle air duct, so that hot air does not pass through a refrigerating system in the equipment cavity, heat waste can be avoided, and energy consumption is reduced.

Description

A display case Technical Field

[0001] This utility model relates to the field of storage technology, and in particular to a display cabinet. Background Technology

[0002] Supermarkets, shopping malls, and restaurants typically display items, such as fresh food or ingredients, using display cases. To meet the storage needs of different items in varying temperature environments, related technologies provide an open display case with two temperature zones: a cold zone and a hot zone. This display case includes a storage cavity, a cold air duct, a hot air duct, and a refrigeration / heating device. The storage cavity, cold air duct, and hot air duct are arranged in a front-to-back direction. The refrigeration / heating device is located at the bottom of the storage cavity and connects to the cold and hot air ducts. The storage cavity is divided into cold and hot zones. In full-cooling mode, cold air enters the entire storage cavity through the cold air duct for cooling. In heating and cooling coexisting mode, hot air enters the hot zone through the hot air duct for heating, and cold air enters the cold zone through the cold air duct for cooling. In heating and ambient temperature coexisting mode, hot air enters the hot zone through the hot air duct for heating, thus allowing the display case to meet the storage needs of various items at different temperatures. However, in the heating and ambient temperature coexisting mode, the hot air passes through the refrigeration device, resulting in heat waste and increased energy consumption. Summary of the Invention

[0003] The purpose of this utility model is to provide a display cabinet to avoid heat waste and reduce energy consumption.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A display cabinet includes a cabinet body and a refrigeration system. The cabinet body includes a storage cavity, an equipment cavity, a cold air duct, and a hot air duct. The storage cavity includes a hot zone and a cold zone arranged vertically. The equipment cavity is located below the storage cavity. The storage cavity, the cold air duct, and the hot air duct are arranged sequentially from front to back. Both the cold air duct and the hot air duct extend vertically. The lower end of the cold air duct communicates with the equipment cavity, and a ventilation hole is provided on the back panel between the cold air duct and the storage cavity. The hot air duct includes a central air duct and a side air duct located to the side of the central air duct. The intermediate air duct has an upper opening that connects to the hot zone via an air inlet duct, and a lower opening that connects to the equipment cavity. Inside the intermediate air duct, from top to bottom, are arranged a heater, a fan, and a lower air damper, which is used to close or open the lower opening of the intermediate air duct. The side air duct connects to the hot zone via a return air duct. Between the side air duct and the intermediate air duct, there is a side air outlet and a side air damper for closing or opening the side air outlet. Along the vertical direction, the side air damper is located between the fan and the lower air damper. The refrigeration system is installed inside the equipment cavity.

[0006] As an optional solution, the cabinet also includes an air duct plate and a side wall. The air duct plate and the side wall both extend in the vertical direction and are spaced apart in the horizontal direction. A side air duct is formed between the side wall and the air duct plate. The middle air duct is located on the side of the side wall away from the air duct plate. The side air vent is opened on the side wall. When the side air vent is opened, the side air vent is tilted, and the high end of the side air vent abuts against the air duct plate. The low end of the side air vent is located below the side air vent and abuts against the side wall.

[0007] As an optional solution, the display cabinet also includes a side air door drive assembly, which is fixedly connected to the side wall and driven by the side air door, for driving the side air door to move relative to the side wall to open or close the side air vent.

[0008] As an optional solution, the side damper drive assembly includes a fixed frame, a connecting arm, a side damper motor, and a transmission gear. The fixed frame is fixedly connected to the side wall, the side damper motor is fixedly connected to the fixed frame, the side damper is fixedly connected to the connecting arm at an angle, the connecting arm is fixedly connected to the transmission gear, and the transmission gear is rotatably mounted on the fixed frame and driven by the side damper motor. When the side damper motor drives the transmission gear to rotate, it drives the side damper to rotate around the axis of the transmission gear to open or close the side air vent.

[0009] As an optional solution, the side damper drive assembly further includes a support shaft, which is supported by the fixing frame. The transmission gear and the connecting arm are rotatably sleeved on the support shaft, and the end face of the connecting arm and the transmission gear are fixedly connected by a first fastener.

[0010] As an optional solution, the side damper drive assembly further includes a first sensor and a second sensor mounted on the fixed frame. The connecting arm includes a first arm and a second arm connected at an angle. The first arm is fixedly connected to the side damper, and the second arm is fixedly connected to the transmission gear. When the side damper closes the side air vent, the second arm engages with the first sensor and disengages from the second sensor. When the side damper opens the side air vent, the second arm engages with the second sensor and disengages from the first sensor.

[0011] As an optional solution, the intermediate air duct is also provided with an upper air door, which has an open position and a closed position. When the upper air door is in the open position, the intermediate air duct is connected to the air inlet duct. When the upper air door is in the closed position, the intermediate air duct is disconnected from the air inlet duct.

[0012] As an optional solution, the cabinet also includes a first panel, a second panel, and a third panel. The first panel and the second panel are spaced apart from each other in the left-right direction. The third panel is connected between the first panel and the second panel. The intermediate air duct is formed between the first panel, the second panel, and the third panel. The left and right ends of the upper air door are rotatably connected to the first panel and the second panel, respectively. When the upper air door is in the open position, it is placed vertically. When the upper air door is in the closed position, it is placed horizontally. The display cabinet also includes an upper air door drive assembly. The upper air door drive assembly is installed on the side of the second panel away from the intermediate air duct. The upper air door drive assembly is drively connected to the upper air door and is used to drive the upper air door to rotate to the open position or the closed position.

[0013] As an optional solution, the cabinet also includes a fourth panel, the left and right ends of which are connected to the first panel and the second panel respectively, the upper end of which is connected to the third panel, and the lower end of which extends downward at an angle; the display cabinet includes a plurality of fans, which are sequentially mounted on the fourth panel along the left-right direction.

[0014] As an optional solution, the lower door includes a lower door panel and a lower sealing strip, the lower door panel and the lower sealing strip are stacked, and the lower sealing strip extends out of the two edges of the lower door panel to abut against the inner wall of the intermediate air duct when the lower door closes the lower opening of the intermediate air duct.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a display cabinet, which includes a cabinet body and a refrigeration system. The cabinet body includes a storage cavity, an equipment cavity, a cold air duct, and a hot air duct. The storage cavity includes a hot zone and a cold zone arranged vertically. The equipment cavity is located below the storage cavity. The storage cavity, cold air duct, and hot air duct are arranged sequentially from front to back. Both the cold air duct and the hot air duct extend vertically. The lower end of the cold air duct communicates with the equipment cavity, and the back panel between the cold air duct and the storage cavity has ventilation holes. The hot air duct includes a central air duct and a central air duct. The display cabinet has a side air duct on the side of the central air duct. The upper opening of the central air duct connects to the hot zone through an air inlet duct, and the lower opening of the central air duct connects to the equipment cavity. Inside the central air duct, from top to bottom, are a heater, a fan, and a lower air damper, which is used to close or open the lower opening of the central air duct. The side air duct connects to the hot zone through a return air duct. Between the side air duct and the central air duct are side air vents and side air dampers for closing or opening the side air vents. Along the vertical direction, the side air damper is located between the fan and the lower air damper. The refrigeration system is installed inside the equipment cavity. In the simultaneous heating and ambient temperature mode, the display cabinet provided by this utility model closes the lower opening of the central air duct with the lower air damper, thus cutting off the central air duct and preventing hot air from passing through the refrigeration system inside the equipment cavity. This avoids heat waste and reduces energy consumption. Attached Figure Description

[0017] Figure 1 is a structural schematic diagram of the display cabinet provided in an embodiment of the present utility model;

[0018] Figure 2 is a structural cross-sectional view of the display cabinet provided in the embodiment of this utility model in full cooling mode;

[0019] Figure 3 is a structural cross-sectional view of the display cabinet provided in the embodiment of this utility model in the mode of simultaneous cooling and heating;

[0020] Figure 4 is a structural cross-sectional view of the display cabinet provided in the embodiment of this utility model in the mode of simultaneous heating and room temperature;

[0021] Figure 5 is a first partial structural schematic diagram of the display cabinet provided in an embodiment of the present utility model;

[0022] Figure 6 is a first structural cross-sectional view of the display cabinet provided in an embodiment of the present utility model;

[0023] Figure 7 is a schematic diagram of the second partial structure of the display cabinet provided in an embodiment of the present utility model;

[0024] Figure 8 is a structural cross-sectional view of the side air door and the side air door drive assembly in the display cabinet provided in the embodiment of this utility model;

[0025] Figure 9 is a structural schematic diagram of the side air door and the side air door drive assembly in the display cabinet provided in the embodiment of this utility model;

[0026] Figure 10 is a second structural cross-sectional view of the display cabinet provided in an embodiment of the present utility model;

[0027] Figure 11 is a schematic diagram of the third partial structure of the display cabinet provided in an embodiment of the present utility model;

[0028] Figure 12 is a schematic diagram of the fourth partial structure of the display cabinet provided in an embodiment of the present utility model;

[0029] Figure 13 is a structural cross-sectional view of the downwind door in the display cabinet provided in this embodiment of the present invention.

[0030] In the picture:

[0031] 1. Cabinet; 11. Storage cavity; 111. Hot zone; 112. Cold zone; 12. Equipment cavity; 121. Upper equipment cavity; 122. Lower equipment cavity; 13. Cold air duct; 14. Hot air duct; 141. Middle air duct; 142. Side air duct; 15. Back panel; 16. Air inlet duct; 17. Air return duct; 18. Air duct plate; 19. Side wall; 191. Side air outlet; 10. First plate; 101. Second plate; 102. Third plate; 103. Fourth plate; 2. Refrigeration system; 21. Evaporator; 22. Evaporator fan; 23. Compressor; 24. Condenser; 25. Condenser fan; 3. Heater; 4. Fan; 5. 51. Lower door panel; 52. Lower sealing strip; 53. Fixing block; 54. Rotating shaft; 55. Lower pressure plate; 56. Second fastener; 6. Upper door; 7. Side door; 8. Side door drive assembly; 81. Fixing frame; 82. Connecting arm; 821. First arm; 822. Second arm; 83. Side door motor; 84. Transmission gear; 85. Support shaft; 86. First fastener; 87. First sensor; 88. Second sensor; 9. Upper door drive assembly; 91. Upper door motor; 92. Upper door gear; 93. Third sensor; 94. Fourth sensor; 95. Detection component; 110. Lower door drive assembly. Detailed Implementation

[0032] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] As shown in Figures 1-13, this embodiment provides a display cabinet, which includes a cabinet body 1 and a refrigeration system 2. The cabinet body 1 includes a storage cavity 11, an equipment cavity 12, a cold air duct 13, and a hot air duct 14. The storage cavity 11 includes a hot zone 111 and a cold zone 112 arranged vertically. The equipment cavity 12 is located below the storage cavity 11. The storage cavity 11, the cold air duct 13, and the hot air duct 14 are arranged sequentially from front to back. Both the cold air duct 13 and the hot air duct 14 extend vertically. The lower end of the cold air duct 13 communicates with the equipment cavity 12, and the back panel 15 between the cold air duct 13 and the storage cavity 11 is provided with ventilation holes. The hot air duct 14 includes a central air duct 141 and a central air duct 142. The middle air duct 141 has a side air duct 142 on the side of the middle air duct 141. The upper opening of the middle air duct 141 is connected to the hot zone 111 through the air inlet duct 16, and the lower opening of the middle air duct 141 is connected to the equipment cavity 12. The middle air duct 141 is provided with a heater 3, a fan 4 and a lower air damper 5 from top to bottom. The lower air damper 5 is used to close or open the lower opening of the middle air duct 141. The side air duct 142 is connected to the hot zone 111 through the return air duct 17. The side air outlet 191 and the side air damper 7 for closing or opening the side air outlet 191 are provided between the side air duct 142 and the middle air duct 141. The side air damper 7 is located between the fan 4 and the lower air damper 5 in the vertical direction. The refrigeration system 2 is installed in the equipment cavity 12.

[0037] Specifically, the display case also includes a heat insulation layer, which divides the equipment cavity 12 into an upper equipment cavity 121 and a lower equipment cavity 122. The upper equipment cavity 121 is connected to the lower opening of the cold air duct 13, and the lower equipment cavity 122 is connected to the lower opening of the intermediate air duct 141. The evaporator 21 and evaporator fan 22 in the refrigeration system 2 are located in the upper equipment cavity 121, and the compressor 23, condenser 24 and condenser fan 25 in the refrigeration system 2 are located in the lower equipment cavity 122.

[0038] As shown in Figure 2, in the full cooling mode, the lower air door 5 closes the lower opening of the middle air duct 141, and the cold air from the cooling system 2 enters the entire storage cavity 11 through the cold air duct 13 and the ventilation holes on the back panel 15 to cool the entire storage cavity 11. As shown in Figure 3, in the cooling and heating mode, the lower air door 5 opens the lower opening of the middle air duct 141, the side air door 7 opens the side air vent 191, and the cold air generated by the cooling system 2 enters the cold zone 112 through the cold air duct 13. The heater 3 heats the air, the fan 4 operates, and the hot air generated by the condenser 24 and the heater 3 of the cooling system 2 is circulated through the cold air duct 13. The hot air enters the hot zone 111 through the central air duct 141 and the air inlet duct 16, then enters the side air duct 142 through the return air duct 17, and finally enters the central air duct 141 through the side air outlet 191, completing the hot air circulation. As shown in Figure 4, when the display cabinet is in both heating and room temperature coexisting modes, the cooling system 2 stops working, the lower air door 5 closes the lower opening of the central air duct 141, the side air door 7 opens the side air outlet 191, the heater 3 heats, the fan 4 works, and the hot air enters the hot zone 111 through the central air duct 141 and the air inlet duct 16, then enters the side air duct 142 through the return air duct 17, and finally enters the central air duct 141 through the side air outlet 191, forming a hot air circulation. In the display cabinet provided in this embodiment, when the display cabinet is in both heating and room temperature coexisting modes, the lower air door 5 closes the lower opening of the central air duct 141, so that the hot air does not pass through the cooling system 2 in the equipment cavity 12, thus avoiding heat waste and reducing energy consumption.

[0039] In this embodiment, as shown in Figures 5-7, the cabinet 1 further includes an air duct plate 18 and a side wall 19. Both the air duct plate 18 and the side wall 19 extend vertically and are spaced apart horizontally, forming a side air duct 142 between the side wall 19 and the air duct plate 18. A central air duct 141 is located on the side of the side wall 19 opposite to the air duct plate 18. A side air vent 191 is opened on the side wall 19. When the side air door 7 opens the side air vent 191, the side air door 7 is tilted, with its high end abutting against the air duct plate 18 and its low end located below the side air vent 191 and abutting against the side wall 19. This arrangement allows the tilted side air door 7 to guide air through the side air vent 191 into the central air duct 141 when the side air door 7 opens the side air vent 191, resulting in smoother airflow. Optionally, the cabinet 1 includes two air duct plates 18 and two side walls 19. Both air duct plates 18 extend vertically and are spaced apart horizontally. The two side walls 19 are located between the two air duct plates 18 and are also spaced apart horizontally. A central air duct 141 is located between the two side walls 19. Adjacent side walls 19 and air duct plates 18 form a side air duct 142. The two air duct plates 18 and two side walls 19 together form two side air ducts 142, located on either side of the central air duct 141 in the horizontal direction. The two side air ducts 142 are connected to the hot zone 111 via two return air ducts 17, allowing the air in the hot zone 111 to quickly return to the central air duct 141 through the two return air ducts 17 and the two side air ducts 142, resulting in faster hot air circulation and higher heating efficiency.

[0040] In this embodiment, as shown in FIG5, the display cabinet further includes a side air door drive assembly 8, which is fixedly connected to the side wall 19 and drivenly connected to the side air door 7, and is used to drive the side air door 7 to move relative to the side wall 19 to open or close the side air vent 191.

[0041] Optionally, as shown in Figures 8 and 9, the side damper drive assembly 8 includes a fixed frame 81, a connecting arm 82, a side damper motor 83, and a transmission gear 84. The fixed frame 81 is fixedly connected to the side wall 19, the side damper motor 83 is fixedly connected to the fixed frame 81, the side damper 7 is fixedly connected to the connecting arm 82 at an included angle, the connecting arm 82 is fixedly connected to the transmission gear 84, and the transmission gear 84 is rotatably mounted on the fixed frame 81 and is driven by the side damper motor 83. When the side damper motor 83 drives the transmission gear 84 to rotate, it drives the side damper 7 to rotate around the axis of the transmission gear 84, thereby opening or closing the side air vent 191. This configuration, by fixing the side damper 7 to the transmission gear 84, modularizes the side damper 7 and the side damper drive assembly 8, allowing for direct installation by fixing the fixed frame 81 to the side wall 19. In other embodiments, the side damper 7 is rotatably connected to the side wall 19, and the side damper motor 83 is driven by the side damper 7.

[0042] In this embodiment, as shown in Figures 8 and 9, the side damper drive assembly 8 further includes a support shaft 85, which is supported by a fixing frame 81. Both the transmission gear 84 and the connecting arm 82 are rotatably mounted on the support shaft 85, and the end faces of the connecting arm 82 and the transmission gear 84 are fixedly connected by a first fastener 86. Since both the connecting arm 82 and the transmission gear 84 are mounted on the support shaft 85, their relative positions are accurately ensured. The fixed connection between the end faces of the connecting arm 82 and the transmission gear 84 by the first fastener 86 makes the connection more reliable. Optionally, the first fastener 86 is a bolt.

[0043] In this embodiment, as shown in FIG8, the side damper drive assembly 8 further includes a first sensor 87 and a second sensor 88 mounted on the fixed frame 81. The connecting arm 82 includes a first arm 821 and a second arm 822 connected at an angle. The first arm 821 is fixedly connected to the side damper 7, and the second arm 822 is fixedly connected to the transmission gear 84. When the side damper 7 closes the side air vent 191, the second arm 822 engages with the first sensor 87 and disengages from the second sensor 88. When the side damper 7 opens the side air vent 191, the second arm 822 engages with the second sensor 88 and disengages from the first sensor 87. When the second arm 822 engages with the first sensor 87 and disengages from the second sensor 88, the first sensor 87 outputs a first signal and the second sensor 88 outputs a second signal, thereby determining that the side air door 7 closes the side air vent 191; when the second arm 822 engages with the second sensor 88 and disengages from the first sensor 87, the first sensor 87 outputs a third signal and the second sensor 88 outputs a fourth signal, thereby determining that the side air door 7 opens the side air vent 191.

[0044] Optionally, in this embodiment, as shown in Figures 10 and 11, an upper air door 6 is also provided in the intermediate air duct 141. The upper air door 6 has an open position and a closed position. When the upper air door 6 is in the open position, the intermediate air duct 141 is connected to the air inlet duct 16. When the upper air door 6 is in the closed position, the intermediate air duct 141 is disconnected from the air inlet duct 16. In this embodiment, by setting the upper air door 6, as shown in Figure 2, in the full cooling mode, the upper air door 6 is in the closed position, and the intermediate air duct 141 is disconnected from the air inlet duct 16. At this time, the cold air in the cold air duct 13 cannot diffuse to the intermediate air duct 141 through the air inlet duct 16, reducing energy consumption and ensuring the cooling effect. As shown in Figures 3 and 4, in the heating and cooling coexistence mode and the heating and room temperature coexistence mode, the upper air door 6 is in the open position, so that the intermediate air duct 141 is connected to the air inlet duct 16. At this time, hot air can enter the hot zone 111 from the intermediate air duct 141 through the air inlet duct 16. Optionally, the upper air door 6 is adjacent to the upper opening of the intermediate air duct 141.

[0045] In this embodiment, as shown in Figure 12, the cabinet 1 further includes a first plate 10, a second plate 101, and a third plate 102. The first plate 10 and the second plate 101 are arranged at intervals relative to each other in the left-right direction, and the third plate 102 is connected between the first plate 10 and the second plate 101. The intermediate air duct 141 is formed between the first plate 10, the second plate 101, and the third plate 102. The left and right ends of the upper air door 6 are rotatably connected to the first plate 10 and the second plate 101, respectively. When the upper air door 6 is in the open position, the upper air door 6 is placed in the vertical direction (up and down direction in the figure). When the upper air door 6 is in the closed position, the upper air door 6 is placed in the horizontal direction. The display cabinet also includes an upper air door drive assembly 9, which is installed on the side of the second plate 101 away from the intermediate air duct 141. The upper air door drive assembly 9 is connected to the upper air door 6 for driving the upper air door 6 to rotate to the open position or the closed position.

[0046] Optionally, as shown in Figure 12, the upper damper drive assembly 9 includes an upper damper motor 91 and an upper damper gear 92. The upper damper motor 91 is fixed to the second plate 101, and the upper damper gear 92 is connected to the upper damper motor 91 in a transmission manner. The upper damper gear 92 is fixedly sleeved on a connecting shaft, and the connecting shaft passes through the second plate 101 and is fixedly connected to the upper damper 6. When the output shaft of the upper damper motor 91 rotates, it drives the upper damper gear 92 to rotate, thereby causing the upper damper 6 to rotate to the open or closed position. Optionally, the upper damper drive assembly 9 further includes a third sensor 93, a fourth sensor 94, and a detection element 95. The detection element 95 is fixedly connected to the upper damper gear 92. The third sensor 93 and the fourth sensor 94 are both fixed to the second plate 101. When the upper damper 6 is in the closed position, the detection element 95 engages with the third sensor 93 and disengages from the fourth sensor 94. When the upper damper 6 is in the closed position, the detection element 95 engages with the fourth sensor 94 and disengages from the third sensor 93. Based on the signals from the third sensor 93 and the fourth sensor 94, it can be determined whether the upper damper 6 is in the open or closed position. Optionally, the first plate 10 and the second plate 101 are respectively arranged parallel to and spaced apart from the two side walls 19, and the upper damper drive assembly 9 is located between the second plate 101 and the adjacent side wall 19.

[0047] Optionally, as shown in Figures 5 and 7, the display case also includes a lower air door drive assembly 110. The lower air door drive assembly 110 is fixedly connected to the side wall 19 and is drivenly connected to the lower air door 5, used to drive the lower air door 5 to move relative to the side wall 19 to close or open the lower opening of the middle air duct 141. It should be noted that the specific structure of the lower air door drive assembly 110 is basically the same as that of the upper air door drive assembly 9, and will not be described in detail here.

[0048] Optionally, as shown in Figure 12, the cabinet 1 further includes a fourth panel 103. The left and right ends of the fourth panel 103 are connected to the first panel 10 and the second panel 101, respectively. The upper end of the fourth panel 103 is connected to the third panel 102, and the lower end of the fourth panel 103 extends downward at an angle. The display cabinet includes multiple fans 4, which are sequentially installed on the fourth panel 103 in a left-right direction. By arranging the multiple fans 4 in a left-right direction within the central air duct 141, the hot air circulation within the central air duct 141 is ensured to be more powerful.

[0049] Optionally, in this embodiment, as shown in FIG13, the lower door 5 includes a lower door panel 51 and a lower sealing strip 52. The lower door panel 51 and the lower sealing strip 52 are stacked, and the lower sealing strip 52 extends beyond the two edges of the lower door panel 51, for abutting against the inner wall of the intermediate air duct 141 when the lower door 5 closes the lower opening of the intermediate air duct 141. Specifically, the lower door 5 includes two lower sealing strips 52 and two lower pressure plates 55 corresponding to the two lower sealing strips 52. The two lower sealing strips 52 extend beyond the two edges of the lower door panel 51, and two second fasteners 56 pass through the corresponding lower pressure plates 55 and the corresponding lower sealing strips 52 and are fastened to the lower door panel 51. The above arrangement ensures that the lower door panel 51 is in close contact with the inner wall of the intermediate air duct 141 when the lower opening of the intermediate air duct 141 is closed, thus guaranteeing a sealing effect. In this embodiment, the lower door panel 51 is further provided with fixing blocks 53 and rotating shafts 54 at both ends. The fixing blocks 53 are fixedly connected to the lower door panel 51, and the rotating shafts 54 are fixedly inserted into the fixing blocks 53. The lower door panel 51 can rotate around the axis of the rotating shafts 54 to open or close the lower opening of the intermediate air duct 141. Optionally, the upper air door 6 and the lower air door 5 have the same structural form.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A display case, characterized in that, The system includes a cabinet (1) and a refrigeration system (2). The cabinet (1) includes a storage cavity (11), an equipment cavity (12), a cold air duct (13), and a hot air duct (14). The storage cavity (11) includes a hot zone (111) and a cold zone (112) arranged vertically. The equipment cavity (12) is located below the storage cavity (11). The storage cavity (11), the cold air duct (13), and the hot air duct (14) are arranged sequentially from front to back. Both the cold air duct (13) and the hot air duct (14) extend vertically. The lower end of the cold air duct (13) is connected to the equipment cavity (12), and the back panel (15) between the cold air duct (13) and the storage cavity (11) is provided with ventilation holes. The hot air duct (14) includes a central air duct (141) and a side air duct (14) located to the side of the central air duct (141). 2) The upper opening of the intermediate air duct (141) is connected to the hot zone (111) through the air inlet duct (16), and the lower opening of the intermediate air duct (141) is connected to the equipment cavity (12). The intermediate air duct (141) is provided with a heater (3), a fan (4) and a lower air door (5) from top to bottom. The lower air door (5) is used to close or open the lower opening of the intermediate air duct (141). The side air duct (142) is connected to the hot zone (111) through the return air duct (17). A side air outlet (191) and a side air door (7) for closing or opening the side air outlet (191) are provided between the side air duct (142) and the intermediate air duct (141). Along the vertical direction, the side air door (7) is located between the fan (4) and the lower air door (5). The refrigeration system (2) is installed in the equipment cavity (12).

2. The display cabinet according to claim 1, characterized in that, The cabinet (1) also includes an air duct plate (18) and a side wall (19). The air duct plate (18) and the side wall (19) both extend in the vertical direction and are spaced apart in the horizontal direction. A side air duct (142) is formed between the side wall (19) and the air duct plate (18). The middle air duct (141) is located on the side of the side wall (19) away from the air duct plate (18). The side air vent (191) is opened on the side wall (19). When the side air door (7) opens the side air vent (191), the side air door (7) is tilted and the high end of the side air door (7) abuts against the air duct plate (18). The low end of the side air door (7) is located below the side air vent (191) and abuts against the side wall (19).

3. The display cabinet according to claim 2, characterized in that, The display cabinet also includes a side air door drive assembly (8), which is fixedly connected to the side wall (19) and driven to the side air door (7), and is used to drive the side air door (7) to move relative to the side wall (19) to open or close the side air vent (191).

4. The display cabinet according to claim 3, characterized in that, The side damper drive assembly (8) includes a fixed frame (81), a connecting arm (82), a side damper motor (83), and a transmission gear (84). The fixed frame (81) is fixedly connected to the side wall (19), the side damper motor (83) is fixedly connected to the fixed frame (81), the side damper (7) is fixedly connected to the connecting arm (82) at an angle, the connecting arm (82) is fixedly connected to the transmission gear (84), the transmission gear (84) is rotatably mounted on the fixed frame (81) and is driven by the side damper motor (83). When the side damper motor (83) drives the transmission gear (84) to rotate, it drives the side damper (7) to rotate around the axis of the transmission gear (84) to open or close the side air vent (191).

5. The display cabinet according to claim 4, characterized in that, The side damper drive assembly (8) further includes a support shaft (85), which is supported by the fixing frame (81). The transmission gear (84) and the connecting arm (82) are rotatably sleeved on the support shaft (85), and the end face of the connecting arm (82) and the transmission gear (84) are fixedly connected by a first fastener (86).

6. The display cabinet according to claim 4, characterized in that, The side damper drive assembly (8) further includes a first sensor (87) and a second sensor (88) mounted on the fixed frame (81). The connecting arm (82) includes a first arm (821) and a second arm (822) connected at an angle. The first arm (821) is fixedly connected to the side damper (7), and the second arm (822) is fixedly connected to the transmission gear (84). When the side damper (7) closes the side air vent (191), the second arm (822) engages with the first sensor (87) and disengages from the second sensor (88). When the side damper (7) opens the side air vent (191), the second arm (822) engages with the second sensor (88) and disengages from the first sensor (87).

7. The display case according to any one of claims 1 to 6, characterized in that The intermediate air duct (141) is also provided with an upper air door (6), which has an open position and a closed position. When the upper air door (6) is in the open position, the intermediate air duct (141) is connected to the air inlet duct (16). When the upper air door (6) is in the closed position, the intermediate air duct (141) is disconnected from the air inlet duct (16).

8. The display case of claim 7, wherein, The cabinet (1) further includes a first plate (10), a second plate (101), and a third plate (102). The first plate (10) and the second plate (101) are spaced apart from each other in the left-right direction. The third plate (102) is connected between the first plate (10) and the second plate (101). The intermediate air duct (141) is formed between the first plate (10), the second plate (101), and the third plate (102). The left and right ends of the upper air door (6) are respectively connected to the first plate (10) and the second plate (101). The upper air door (6) is rotatably connected. When the upper air door (6) is in the open position, the upper air door (6) is placed vertically. When the upper air door (6) is in the closed position, the upper air door (6) is placed horizontally. The display cabinet also includes an upper air door drive assembly (9). The upper air door drive assembly (9) is installed on the side of the second plate (101) away from the middle air duct (141). The upper air door drive assembly (9) is connected to the upper air door (6) for driving the upper air door (6) to rotate to the open position or the closed position.

9. The display cabinet according to claim 8, characterized in that, The cabinet (1) also includes a fourth plate (103), the left and right ends of which are connected to the first plate (10) and the second plate (101) respectively, the upper end of which is connected to the third plate (102), and the lower end of which extends downward at an angle; the display cabinet includes a plurality of fans (4), which are installed sequentially on the fourth plate (103) along the left and right direction.

10. The display case according to any one of claims 1 to 6, characterized in that, The lower door (5) includes a lower door panel (51) and a lower sealing strip (52). The lower door panel (51) and the lower sealing strip (52) are stacked, and the lower sealing strip (52) extends out of the two edges of the lower door panel (51) to abut against the inner wall of the middle air duct (141) when the lower door (5) closes the lower opening of the middle air duct (141).

Images