Cold chain display cabinet with double refrigeration modes

Abstract

The invention discloses a cold chain display cabinet with double refrigeration modes, and relates to the technical field of cold chain display cabinets, the cold chain display cabinet comprises an equipment bin and a storage bin, and the equipment bin is internally provided with a refrigeration part composed of a refrigeration air duct, a fan and anti-condensation glass; the storage bin comprises an inner container, an isolation constant-temperature cavity is formed between the inner container and the storage bin shell, a linkage ventilation opening is formed in the inner container, a linkage piece is further arranged in the isolation constant-temperature cavity, and the linkage piece is provided with a linkage sealing door for sealing the linkage ventilation opening when the cabinet door is opened and a control unit for controlling the opening and closing actions of the linkage sealing door. Cooperative work of direct cooling of the evaporator and forced air supply of the air duct is achieved through the refrigerating part, and the problem of uneven temperature in the cabinet is solved. Meanwhile, automatic switching of the flow direction of cold air during door opening is achieved through the linkage piece, the cold air is guided into the isolation constant-temperature cavity, and cold air loss is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold chain display cabinets, and particularly relates to a cold chain display cabinet with double refrigeration modes. BACKGROUND

[0002] The cold chain display cabinet is an indispensable device in modern commerce (such as supermarkets, convenience stores, pharmacies, and fresh food specialty stores) and specific scientific research and medical environments, and is mainly used for displaying and storing temperature-sensitive goods or articles, such as food, dairy products, beverages, medicines, and biological reagents, in a constant low-temperature environment.

[0003] The core function is to maintain the stability and uniformity of the temperature in the cabinet to ensure the quality, safety, and shelf life of the stored articles.

[0004] For example, a fresh food freezer disclosed in Chinese Patent No. CN207907564U includes a freezer and a base, the freezer is located at the upper end of the base, the upper end of the freezer is provided with a radiation sterilization lamp, a temperature sensor and a temperature controller are arranged at the lower end of the freezer, and the temperature sensor is located on one side of the temperature controller. The temperature sensor, the temperature controller, the condensing compressor unit, and the touch temperature adjustment display screen can control the temperature of the fresh food freezer, so that the fresh food freezer has the dual use effect of freezing and refrigeration, and the thickened foamed layer and the heat insulation layer can greatly improve the heat preservation effect of the freezer and effectively save power resources.

[0005] However, the above-mentioned display cabinet still has some deficiencies in actual use: 1. At present, in the refrigeration process of the direct-cooling cold chain display cabinet, the evaporator is installed at the rear side and relies on the sinking of cold air, and the hot air rises naturally to complete the refrigeration cycle. The air circulation speed is slow, and the temperature at the front side is often high due to the long distance from the evaporator, which has the risk of thawing and deterioration.

[0006] 2. Secondly, when the glass door of the direct-cooling cold chain display cabinet is opened, the cold air is lost seriously. When the door is opened, the cold air in the cabinet is quickly discharged, which not only increases the working load of the refrigeration system, but also causes the temperature in the cabinet to fluctuate sharply.

[0007] 3. In addition, although some existing cold chain display cabinets are provided with automatic door closing devices, most of them use simple spring return structures, the closing force is uncontrollable, and the door closing mechanism of the cold chain display cabinet is unreasonable. When the purchasing personnel stand and observe the internal products, the glass door of the cold chain display cabinet is often opened and then automatically closed slowly, so the door needs to be opened multiple times. When the purchasing personnel needs to select multiple goods, they often need to go back and forth, which affects the experience.

[0008] Therefore, under the above-mentioned viewpoints, there is still room for improvement for the existing display cabinet. SUMMARY

[0009] To solve the above problems, the application provides a cold chain display cabinet with double refrigeration modes, which adopts the following technical scheme: A cold chain display cabinet with double refrigeration modes comprises a bottom equipment compartment and a top storage compartment, and the storage compartment is integrally connected with the equipment compartment. A cavity is formed in the equipment compartment, and the cavity of the equipment compartment is further provided with: a refrigeration component for controlling the temperature in the storage compartment; and a linkage component for realizing linkage between the storage compartment and the refrigeration component. The refrigeration component comprises a plurality of H-shaped refrigeration air ducts arranged at the bottom of the equipment compartment, a condensation-proof glass arranged at the front air outlet of the refrigeration air duct, a dust-proof hopper arranged at the rear air inlet of the refrigeration air duct to prevent dust from entering, and a fan for quickly blowing the cold air generated by an evaporator to different areas of the storage compartment. The plurality of fans are arranged at the middle corner of the refrigeration air duct. An inner container is arranged in the storage compartment, and an isolated constant-temperature cavity is formed between the storage compartment and the inner container.

[0010] Preferably, a plurality of linkage air vents for enabling the isolated constant-temperature cavity to communicate with the inner container are arranged at equal intervals on the inner container.

[0011] The linkage component further comprises a rotating shaft for controlling the rotation of the linkage sealing door, a linkage gear connected with the rotating shaft, a linkage rack moving along the height direction of the storage compartment, and a control unit linked with the glass cabinet doors of the storage compartment and controlling the movement of the linkage rack. The rotating shaft is arranged on the inner wall of the storage compartment, and a torsional spring is arranged on the rotating shaft to make the linkage sealing door always have a tendency to open.

[0012] The control unit comprises a first control rod and a second control rod relatively moving along the length direction of the storage compartment, and the first control rod and the second control rod correspond to two glass cabinet doors of the storage compartment respectively. A square slot is arranged on one side of the first control rod, a buckle moving along the height direction of the square slot is arranged in the square slot, a control tension spring is arranged between the bottom of the buckle and the first control rod, and the first control rod extends towards the wedge-shaped block at the end away from the square slot.

[0013] The second control rod is provided with the same square slot, buckle and control tension spring on one side. A linkage wedge-shaped block is arranged on the other side of the second control rod, a third control rod is arranged on the linkage wedge-shaped block, and the third control rod extends towards the wedge-shaped block. The contact ends of the linkage wedge-shaped block, the second control rod and the third control rod are all inclined surfaces, and an execution tension spring is arranged between the linkage wedge-shaped block and the inside of the storage compartment.

[0014] The glass cabinet door of the storage compartment has protrusions that correspond to the buckles on the first and second control levers, and the bottom of the protrusions is triangular cone-shaped.

[0015] The storage compartment is also equipped with two sets of electric push rods that control the automatic closing of the glass cabinet doors. The output end of the closed electric push rod is connected to the glass cabinet door, and the fixed end of the closed electric push rod is located on the inner wall of the storage compartment.

[0016] The linkage sealing door is equipped with a metal trigger point, and the linkage vent of the inner liner is also equipped with a metal trigger point. Both of them have wires extending outward to connect to the closing electric push rod. The timing is triggered when the metal trigger point contacts the door.

[0017] A detector is installed at the height of the storage compartment and the glass cabinet door.

[0018] The wedge-shaped block is slidably mounted on the guide post, which is located on the inner wall of the storage compartment. The inner liner also has a groove for the movement of the buckle block.

[0019] In summary, this application includes at least one of the following beneficial technical effects: I. This invention combines two modes: direct cooling via evaporator and forced air delivery via duct. The former provides basic cooling, while the latter uses a fan and a U-shaped surround air duct to precisely and quickly deliver cold air to areas prone to heating, such as the front of the storage compartment, solving the problems of large temperature differences and uneven cooling in traditional cold chain display cabinets. The anti-condensation glass used at the front air outlet of the duct not only allows air to flow but also prevents condensation, ensuring a clear view and excellent display effect inside the cabinet without sacrificing display area to install additional anti-condensation pipes, thus optimizing space utilization.

[0020] Second, the linkage mechanism of this invention automatically closes the linkage vent on the inner liner the moment the user opens the glass cabinet door, switching the cold air passage to the isolated constant temperature cavity between the storage compartment and the inner liner. This converts the cold air that would otherwise be directly lost when the door is opened into continuous cooling of the inner liner, greatly reducing cold loss and alleviating the load on the evaporator and refrigeration system, thus achieving significant energy savings and consumption reduction.

[0021] Third, this invention achieves automatic delayed closing of the cabinet door and full-process anti-pinch protection through the cooperation of a reset component and a detector. The reset component only performs the closing action when it is confirmed that no one is using the cabinet, which effectively avoids interfering with the user experience and eliminates energy waste caused by forgetting to close the door. Furthermore, real-time obstacle detection during the closing process effectively prevents pinching accidents, greatly improving safety. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1This is a schematic diagram of the main structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the structure between the equipment compartment, evaporator, storage compartment and anti-condensation glass of the present invention.

[0025] Figure 3 This is a plan view of the main body of the present invention.

[0026] Figure 4 This is a first-view structural schematic diagram of the linkage component of the present invention.

[0027] Figure 5 This is a second-view structural schematic diagram of the linkage component of the present invention.

[0028] Figure 6 This is a first-view structural schematic diagram of the control unit of the present invention.

[0029] Figure 7 This is the present invention. Figure 6 Enlarged view of the local structure at point A in the image.

[0030] Figure 8 This is a plan view of the control lever in the control unit of the present invention, which realizes the opening and closing of the glass cabinet door.

[0031] Figure 9 This is a second-view structural schematic diagram of the control unit of the present invention.

[0032] Figure 10 This is a plan view of the second control lever in the control unit of the present invention realizing the opening and closing of the glass cabinet door.

[0033] Figure 11 This is a schematic diagram of the structure between the closed electric push rod, the metal trigger point, the detector, and the anti-condensation glass of the present invention.

[0034] Explanation of reference numerals in the attached figures: 1. Equipment compartment; 10. Evaporator; 2. Storage compartment; 3. Refrigeration components; 4. Linkage components; 20. Glass cabinet door; 30. Refrigeration air duct; 31. Anti-condensation glass; 32. Dustproof hopper; 33. Fan; 34. Multifunctional mesh pipe; 5. Inner liner; 50. Insulated constant temperature chamber; 51. Linkage vent; 40. Linkage sealing door; 41. Rotating shaft; 42. Linkage gear; 43. Linkage rack; 44. Control unit; 45. Torsion spring; 440. Control lever No. 1; 441. Control lever No. 2; 442. Square slot; 443. Buckle block; 444. Control tension spring; 445. Wedge block; 446. Linkage wedge block; 447. Control lever No. 3; 448. Actuation tension spring; 449. Protrusion block; 80. Closing electric push rod; 60. Metal trigger point; 7. Detector; 4450. Guide column. Detailed Implementation

[0035] The following combination Figures 1-11 This application will be described in further detail.

[0036] This application discloses a cold chain display cabinet with dual refrigeration methods; it includes a bottom equipment compartment 1 and a top storage compartment 2. The equipment compartment 1 is used to place electronic components and various devices for temperature control of the storage compartment 2. The storage compartment 2 contains various frozen or fresh foods that need to be temperature controlled at a certain refrigeration temperature.

[0037] Reference Figure 1 As shown, the cold chain display case adopts an integrated connection structure of bottom equipment compartment 1 and top storage compartment 2. The two are formed through a seamless connection process to ensure structural stability and thermal insulation and sealing. The equipment compartment 1 forms an independent chamber to accommodate the core components of refrigeration unit 3 and linkage unit 4. The storage compartment 2 is an open display space with a glass cabinet door 20 that can be opened in both directions at the top. The glass cabinet door 20 and the edge of the storage compartment 2 are sealed with sealing strips to reduce cold air leakage under normal conditions.

[0038] It should be noted that the interior of the cold chain display case contains some existing known equipment, such as condensers, evaporators, defrosters, etc.

[0039] Example 1: Reference Figure 2 and Figure 3 As shown, a chamber is formed inside the equipment compartment 1. Inside the chamber of the equipment compartment 1, there is a cooling component 3 for controlling the temperature inside the storage compartment 2, and a linkage component 4 for linking the storage compartment 2 and the cooling component 3.

[0040] The refrigeration component 3 includes several U-shaped refrigeration ducts 30 installed at the bottom of the equipment compartment 1, anti-condensation glass 31 installed at the front air outlet of the refrigeration duct 30, dustproof hopper 32 installed at the air inlet of the refrigeration duct 30 to prevent dust from entering, and a fan 33 that quickly blows the cold air generated by the evaporator 10 to different areas of the storage compartment 2; the fan 33 is located at the middle corner of the refrigeration duct 30.

[0041] The cooling air duct 30 is arranged in a U-shape at the bottom of the equipment compartment 1. The main body of the air duct is made of heat-insulating material, and the inner wall is smoothed to reduce airflow resistance. The inverted U-shaped structure design allows the air duct to extend to both sides along the bottom of the storage compartment 2, forming a surrounding airflow path to ensure that the cold air can cover the entire area of ​​the storage compartment 2.

[0042] The front air outlet of the cooling duct 30 is equipped with anti-condensation glass 31. The glass adopts a double-layer hollow structure, with the inner layer coated with an anti-condensation coating. The surface temperature of the glass is maintained by the circulation of cold air in the duct, avoiding condensation caused by the temperature difference between the inside and outside, and ensuring display clarity.

[0043] The evaporator 10 is located at the rear of the equipment compartment 1, and its outlet is divided into two paths: one path connects directly to the rear cavity of the storage compartment 2 through the top direct pipe 11; the other path connects to the air inlet of the refrigeration duct 30. The fan 33 is located downstream of the air inlet and is used to force some of the cold air into the refrigeration duct 30 to achieve parallel cooling of direct cooling and air cooling.

[0044] In practice, the evaporator 10 in the cold chain display cabinet equipment compartment 1 starts to cool at a constant temperature. Then, the cold air generated by the evaporator 10 is transported to the storage compartment 2 through the pipe on its top, thereby achieving the cooling effect of the storage compartment 2. This is the first cooling method, which is also the most common cooling method.

[0045] The second refrigeration method is the refrigeration component 3 of this application. When the evaporator 10 is working, the fan 33 starts simultaneously. The fan 33 draws the cold air generated by the evaporator 10 into the refrigeration duct 30 and controls it to evenly transport the cold air along the refrigeration duct 30 to the front area of ​​the storage compartment 2 (therefore, the evaporator 10 is generally located at the rear of the storage compartment 2). A fan 33 is added below the evaporator 10 at the bottom of the cold chain display cabinet, and a refrigeration duct 30 is constructed. After the air is cooled by the evaporator 10, it is accelerated downward by the fan 33, and reaches the air outlet at the front of the cold chain display cabinet after passing through the fan 33 and the refrigeration duct 30. The specially structured anti-condensation glass 31 is used as the air outlet, which can serve as both the air outlet of the duct and the anti-condensation function of the front glass, without affecting the display area and display effect. The cold air blown out from the air outlet effectively reduces the front load temperature and accelerates the refrigeration cycle.

[0046] The fan 33 is installed at the middle corner of the cooling duct 30, a critical node for airflow direction. The fan 33's outlet faces inward into the duct, and through its forced airflow, the cold air generated by the evaporator 10 is quickly pushed to all sections of the duct, improving cooling efficiency. The fan 33 features a low-noise, high-pressure design to ensure uniform airflow and stable operation.

[0047] Reference Figure 3 As shown, the refrigeration component 3 also includes a multi-functional mesh pipe 34 that sprays cold air outward. The multi-functional mesh pipe 34 is disposed on the refrigeration duct 30, so that the multi-functional mesh pipe 34 can transport the cold air in the refrigeration duct 30 to multiple areas in the storage compartment 2.

[0048] The multi-functional mesh tube 34 is connected to the side wall of the cooling duct 30. Extending along the inner wall of the storage compartment 2, the multi-functional mesh tube 34 has multiple vents distributed on its surface, facing various areas inside the storage compartment 2. The multi-functional mesh tube 34 allows the cold air in the cooling duct 30 to be precisely sprayed into localized areas of the storage compartment 2 through the vents, achieving secondary distribution of the cold air, further improving cooling uniformity, and adapting to the temperature requirements of different stored items.

[0049] A dust hopper 32 is installed at the air inlet of the cooling duct 30 to facilitate dust settling and cleaning, while preventing dust from directly entering the duct and blocking the airflow channel or adhering to the surface of the evaporator 10.

[0050] Example 2: Reference Figure 3 , Figure 4 and Figure 5 As shown, based on Embodiment 1, in order to further improve the refrigeration efficiency and save energy waste, this application also proposes a linkage component 4. The linkage component 4 ensures that the glass cabinet door 20 of the storage compartment 2 is linked with the refrigeration component 3. When the glass cabinet door 20 is opened, the cold air that is directly introduced into the inner liner 5 of the storage compartment 2 enters the insulated constant temperature cavity 50 between the storage compartment 2 and the inner liner 5. This ensures the refrigeration temperature of the items in the inner liner 5 while reducing refrigeration losses.

[0051] Let's look again. Figure 5 As shown, specifically, the storage compartment 2 includes an inner liner 5 that serves to insulate and keep warm. An insulated constant temperature cavity 50 is formed between the storage compartment 2 and the inner liner 5. Several linkage vents 51 are equally spaced on the inner liner 5 to drive the insulated constant temperature cavity 50 to communicate with the inner liner 5.

[0052] The storage compartment 2 has an inner liner 5 made of high-strength insulation material, which forms an insulated constant-temperature cavity 50 between itself and the outer shell of the storage compartment 2. This cavity serves as a cold air buffer area, capable of maintaining a relatively stable low-temperature environment. The surface of the inner liner 5 has evenly distributed linkage vents 51 with rounded edges. These vents facilitate airflow communication between the insulated constant-temperature cavity 50 and the interior of the inner liner 5, allowing the buffered cold air to continuously enter the inner liner 5 and maintain a stable temperature in the storage area.

[0053] When the glass cabinet door 20 is opened, the cold air in the cooling duct 30 is stored in the insulated constant temperature chamber 50. This not only maintains the temperature of the storage area through the inner liner 5, but also temporarily stores the cold air. After the glass cabinet door 20 is closed, the cold air stored in the insulated constant temperature chamber 50 will quickly fill the inner liner 5 through the linkage vent 51, which can ensure that the temperature inside the inner liner 5 is controlled within the specified range in a short time, thereby making up for the cold air lost when the glass cabinet door 20 is opened.

[0054] Reference Figure 6 and Figure 7As shown, specifically, the linkage 4 is set inside the isolating constant temperature chamber 50 to realize the synchronous linkage of opening of glass cabinet door 20 and closing of linkage sealing door 40; the linkage 4 includes linkage sealing door 40 which is rotatably set at linkage vent 51 to realize its opening and closing, rotating shaft 41 that controls the rotation of linkage sealing door 40, linkage gear 42 connected to rotating shaft 41, linkage rack 43 that moves along the height direction of storage compartment 2, and control unit 44 that is linked with glass cabinet door 20 of storage compartment 2 and controls the movement of linkage rack 43.

[0055] The rotating shaft 41 is rotatably mounted on the inner wall of the storage compartment 2. A torsion spring 45 is provided on the rotating shaft 41 so that the linkage sealing door 40 always tends to open. The linkage rack 43 is slidably mounted on the inner wall of the storage compartment 2.

[0056] In the initial state, the torsion spring 45 is set on the rotating shaft 41, so that the linkage sealing door 40 on the rotating shaft 41 is in the rotating open state. Therefore, the linkage vent 51 on the inner liner 5 is open at this time, ensuring that the cold air in the cooling air duct 30 can be blown directly into the inner liner 5.

[0057] In practice, when the glass cabinet door 20 of the storage compartment 2 needs to be opened, the linkage rack 43 moves downward to control the linkage gear 42 to rotate. The linkage gear 42 rotates clockwise. At the same time, the linkage gear 42 rotates clockwise through the rotating shaft 41, causing the linkage sealing door 40 to rotate clockwise, so that the linkage sealing door 40 closes the linkage vent 51 on the inner liner 5. At this time, the cold air through the cooling duct 30 enters the insulated constant temperature chamber 50. The insulated constant temperature chamber 50 keeps the surface of the inner liner 5 at a low temperature, and then the temperature of the goods stored inside is directly controlled through the inner liner 5.

[0058] Reference Figure 7 , Figure 8 and Figure 9 As shown, specifically, the control unit 44 includes a first control lever 440 and a second control lever 441 that move relative to each other along the length of the storage compartment 2. The first control lever 440 and the second control lever 441 correspond to the two glass cabinet doors 20 of the storage compartment 2, and the closing of the linkage sealing door 40 can be controlled regardless of which glass cabinet door 20 is opened.

[0059] A square groove 442 is provided on one side of the first control lever 440. A buckle 443 that moves along its height direction is provided in the square groove 442 of the first control lever 440. A control tension spring 444 is provided between the bottom of the buckle 443 and the first control lever 440. The end of the first control lever 440 away from the square groove 442 extends toward the wedge block 445.

[0060] The second control lever 441 has a square groove 442, a buckle 443, and a control spring 444 on one side, which are the same as those on the first control lever 440.

[0061] On the other side of the second control lever 441, there is a linkage wedge 446, and on the linkage wedge 445, there is a third control lever 447, which extends toward the wedge 445.

[0062] The contact ends of the linkage wedge block 445 with the second control lever 441 and the third control lever 447 are all inclined surfaces, and an actuation spring 448 is provided between the linkage wedge block 445 and the interior of the storage compartment 2.

[0063] The glass cabinet door 20 of the storage compartment 2 is provided with a protrusion 449 corresponding to the buckle 443 on the first control lever 440 and the second control lever 441. The bottom of the protrusion 449 is triangular cone-shaped.

[0064] The control unit 44 is crucial for the linkage between the cabinet door and the refrigeration system. It comprises two main parts: a first control lever 440 and a second control lever 441. These two control levers are positioned opposite each other along the length of the storage compartment 2, corresponding to the two glass cabinet doors 20 of the storage compartment 2, respectively. Regardless of which glass cabinet door 20 the user opens, the control unit 44 will trigger a response, ensuring that the linked sealing door 40 closes promptly to prevent cold air leakage. One side of the first control lever 440 is designed with a square groove 442, within which a movable latch 443 is installed. A control spring 444 connects the bottom of the latch 443 to the first control lever 440, providing the necessary elastic force. The other end of the first control lever 440 extends towards the wedge-shaped block 445 to enhance the mechanical interlocking effect.

[0065] In practice, the ends of both control lever 440 and control lever 441 abut against the same wedge block 445. When any glass cabinet door 20 is opened, its corresponding protrusion 449 pushes the corresponding latch 443, thereby causing the corresponding control lever 440 or control lever 441 to move towards the wedge block 445, thus pressing down on the wedge block 445. The downward movement of the wedge block 445 directly acts on the linkage rack 43, causing it to move downward.

[0066] Reference Figure 9 and Figure 10 As shown, similarly, the second control lever 441 is also equipped with the same square slot 442, latch block 443, and control spring 444 structure. Furthermore, the other side of the second control lever 441 contacts a linkage wedge 446, which further interacts with the third control lever 447. The third control lever 447 also extends towards the wedge block 445, forming a chain reaction. The linkage wedge 446 is designed with a beveled contact, with its interfaces to both the second and third control levers 441 and 447 both abutting at bevels, resulting in smoother force transmission. An actuation spring 448 is also provided between the linkage wedge 446 and the interior of the storage compartment 2 to return to its original position after the action is completed.

[0067] To ensure effective docking between the control unit 44 and the glass cabinet door 20, protrusions 449 are specially provided on the glass cabinet door 20. The positions of these protrusions 449 correspond to the latches 443 on the first control lever 440 and the second control lever 441. The bottom of the protrusion 449 is triangular pyramidal in shape, which facilitates smooth insertion into the latches 443 when the cabinet door is closed and triggers the release mechanism when the door is opened.

[0068] In practice, when the glass cabinet door 20 is opened, the protrusion 449 at the bottom contacts and pushes the latch 443 to move synchronously. The latch 443 drives the first control lever 440 to move synchronously towards the wedge block 445, and pushes the wedge block 445 to press down on the linkage rack 43, so that the linkage rack 43 drives the rotating shaft 41 and the linkage sealing door 40 to rotate through the linkage gear 42, so that the linkage sealing door 40 covers the linkage vent 51, thereby isolating the constant temperature cavity 50 and preventing cold air from directly entering the inner liner 5.

[0069] When the glass cabinet door 20 is closed, the first control lever 440 loses pressure on the wedge block 445. At this time, under the deformation elastic force of the torsion spring 45, the linkage sealing door 40 returns to its initial state (the linkage sealing door 40 is tilted open).

[0070] Example 3: Based on Embodiment 2, in order to further improve cooling efficiency and reduce excessive energy consumption, this application also proposes a reset component 8, referring to... Figure 11 As shown, the storage compartment 2 is also equipped with two sets of electric closing push rods 80 that control the automatic closing of the glass cabinet doors 20 of the storage compartment 2.

[0071] The output end of the closed electric push rod 80 is connected to the protrusion 449 of the glass cabinet door 20, and the fixed end of the closed electric push rod 80 is located on the inner wall of the storage compartment 2.

[0072] The linkage sealing door 40 is provided with a metal trigger point 60, and the inner liner 5 is provided with a metal trigger point 60 near the linkage vent 51. Both of them have wires extending outward to connect with the closing electric push rod 80. The metal trigger point 60 contacts to trigger the timing.

[0073] A detector 7 is installed in the height direction of the storage compartment 2 and the glass cabinet door 20.

[0074] Two sets of closing electric actuators 80 control the two glass cabinet doors 20 of the storage compartment 2, enabling them to close automatically when no one is operating them. The output end of the closing electric actuator 80 is directly connected to the protrusion 449 of the glass cabinet door 20, while the fixed end is installed on the inner wall of the storage compartment 2. A trigger 6 is also integrated in the middle of the closing electric actuator 80 to monitor and execute the closing action.

[0075] The trigger element 6 consists of metal trigger points 60, one of which is located on the linkage sealing door 40, and the other is located near the linkage vent 51 of the inner liner 5. Both metal trigger points 60 are connected to the closing electric push rod 80 via wires. When the metal trigger points 60 come into contact with each other, a timing mechanism is triggered, which activates the closing electric push rod 80 after a certain delay, thereby automatically closing the cabinet door. This design avoids prolonged door opening due to human negligence, saving energy.

[0076] Finally, a detector 7 is installed at the height of the storage compartment 2 and the glass cabinet door 20. This detector 7 can monitor the cabinet door status and internal temperature changes in real time, providing data support for the entire system and ensuring the accuracy of the cooling and linkage process.

[0077] In practice, when the glass cabinet door 20 is opened, the linkage sealing door 40 immediately adheres to the inner liner 5, closing the linkage vent 51 of the inner liner 5. At this time, the metal trigger point 60 on the linkage sealing door 40 contacts the metal trigger point 60 near the inner liner 5, and the timing operation begins. After the timing reaches more than 90 seconds (the time can be adjusted), the closing electric push rod 80 is triggered, which pushes the glass cabinet door 20 to close. The closing is done at a uniform and slow speed.

[0078] Meanwhile, detector 7 starts working every 30 seconds (the time can be adjusted). Detector 7 emits an infrared sensing light curtain at the same height as the glass cabinet door 20. If the infrared sensing light curtain detects an arm or object blocking it, it means that someone is observing or taking goods after the glass cabinet door 20 is opened. At this time, the timer of the metal trigger point 60 immediately resets to zero and then restarts. After every 30 seconds, detector 7 works again. If the infrared sensing light curtain detects an arm or object blocking it, the timer of the metal trigger point 60 resets to zero again and then restarts. This continues until detector 7 has repeatedly detected no arm or object blocking it. When the timer of the metal trigger point 60 reaches a normal value greater than 90 seconds, it controls the closing electric push rod 80 to close the glass cabinet door 20.

[0079] During the closing process of the glass cabinet door 20, the detector 7 remains operational. If the detector 7 detects an arm or object obstructing the door, the metal trigger point 60 immediately resets to zero, and the closing electric push rod 80 immediately stops working to prevent fingers or objects from being pinched. The glass cabinet door 20 will only close after the detector 7 has detected no object during the entire closing process.

[0080] It should be noted that the detector 7 will immediately shut down and stop working after the glass cabinet door 20 is closed. The detector 7 will only start working again when the glass cabinet door 20 is opened. Additionally, if the glass cabinet door 20 is not completely closed and a gap remains, the same principle will be used to automatically close the glass cabinet door 20.

[0081] Once the glass cabinet door 20 is completely closed, the linkage vent 51 on the inner liner 5 will open simultaneously, delivering cold air into the inner liner 5.

[0082] During operation: Step 1: After the cold chain display cabinet is powered on, the evaporator 10 in equipment compartment 1 starts working, generating cold air. The cold air is directly transported to the interior of storage compartment 2 through the pipes at the top of the evaporator 10, achieving initial cooling and temperature control of storage compartment 2. This refrigeration method is suitable for conventional refrigeration or freezing needs.

[0083] Step Two: Simultaneously with the operation of the evaporator 10, the fan 33 starts, drawing the cold air generated by the evaporator 10 into the cooling duct 30. The cold air flows along the cooling duct 30, passing through the anti-condensation glass 31 at its front outlet and being evenly blown towards the front area of ​​the storage compartment 2. At the same time, the multi-functional mesh pipe 34 sprays the cold air into multiple areas within the storage compartment 2, improving cooling efficiency and uniformity. This method accelerates cold air circulation and reduces temperature fluctuations through the cooling duct 30 and the fan 33.

[0084] Step 3: When the user opens any glass cabinet door 20, the control unit 44 is triggered: the protrusion 449 on the cabinet door cooperates with the latch 443 on the first or second control lever 441, driving the rotating shaft 41 through the linkage rack 43 and linkage gear 42, causing the linkage sealing door 40 to close the linkage vent 51 on the inner liner 5. At this time, the cold air from the cooling duct 30 is transferred into the insulated constant temperature cavity 50 between the storage compartment 2 and the inner liner 5, indirectly cooling the contents of the storage compartment 2 through the inner liner 5, reducing cold air leakage and energy consumption.

[0085] Step 4: After the interlocking sealing door 40 closes, its metal trigger point 60 contacts the metal trigger point 60 near the inner liner 5, starting the timer. If the glass cabinet door 20 remains open for longer than a preset time (e.g., 90 seconds), the system will prepare to initiate the automatic closing procedure.

[0086] Step 5: Detector 7 periodically (e.g., every 30 seconds) emits an infrared light curtain to scan the cabinet door height area. If an obstacle (such as an arm or object) is detected, the timer resets; otherwise, the timer continues to run. During the automatic door closing process, detector 7 continuously monitors; if an obstacle is detected, the closing action immediately stops to prevent pinching or damage to items.

[0087] Step Six: After the glass cabinet door 20 is fully closed, the linkage sealing door 40 reopens the linkage vent 51 under the action of the torsion spring 45 on the pivot 41, allowing cold air to directly enter the inner liner 5. The detector 7 stops working until the door is opened again. The system resumes normal cooling, ensuring a stable temperature inside the storage compartment 2.

[0088] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A cold chain display cabinet with dual refrigeration methods, characterized in that: It includes a bottom equipment compartment (1) and a top storage compartment (2), and the storage compartment (2) is integrally connected with the equipment compartment (1); A chamber is formed inside the equipment compartment (1), and the chamber of the equipment compartment (1) is further provided with: Refrigeration components (3) for temperature control inside the storage compartment (2); Linkage component (4) to enable linkage between storage compartment (2) and refrigeration component (3); The refrigeration component (3) includes several U-shaped refrigeration ducts (30) provided at the bottom of the equipment compartment (1), anti-condensation glass (31) provided at the front air outlet of the refrigeration duct (30), a dustproof hopper (32) provided at the rear air inlet of the refrigeration duct (30) to prevent dust from entering, and a fan (33) that quickly blows the cold air generated by the evaporator to different areas of the storage compartment (2). Several fans (33) are located at the corner of the middle part of the cooling air duct (30); The storage compartment (2) is provided with an inner liner (5), and an isolation constant temperature cavity (50) is formed between the storage compartment (2) and the inner liner (5). The linkage component (4) is located in the isolation constant temperature cavity (50), and the linkage component (4) includes a linkage sealing door (40) that connects or isolates the isolation constant temperature cavity (50) from the inner liner (5).

2. The cold chain display cabinet with dual refrigeration methods according to claim 1, characterized in that: Several linkage vents (51) are opened at equal intervals on the inner liner (5) to drive the isolation thermostatic cavity (50) to connect with the inner liner (5).

3. A cold chain display cabinet with dual refrigeration methods according to claim 1, characterized in that: The linkage component (4) also includes a rotating shaft (41) that controls the rotation of the linkage sealing door (40), a linkage gear (42) connected to the rotating shaft (41), a linkage rack (43) that moves along the height direction of the storage compartment (2), and a control unit (44) that links with the glass cabinet door of the storage compartment (2) and controls the movement of the linkage rack (43). The rotating shaft (41) is rotatably mounted on the inner wall of the storage compartment (2). A torsion spring (45) is provided on the rotating shaft (41) so that the linkage sealing door (40) always tends to open. The linkage rack (43) is slidably mounted on the inner wall of the storage compartment (2).

4. A cold chain display cabinet with dual refrigeration methods according to claim 3, characterized in that: The control unit (44) includes a first control lever (440) and a second control lever (441) that move relative to each other along the length of the storage compartment (2). The first control lever (440) and the second control lever (441) correspond to the two glass cabinet doors of the storage compartment (2), and the linkage sealing door (40) is closed regardless of which glass cabinet door is opened. A square groove (442) is provided on one side of the first control lever (440). A buckle (443) that moves along its height direction is provided in the square groove (442) of the first control lever (440). A control tension spring (444) is provided between the bottom of the buckle (443) and the first control lever (440). The end of the first control lever (440) away from the square groove (442) extends towards the wedge block (445).

5. A cold chain display cabinet with dual refrigeration methods according to claim 4, characterized in that: The second control lever (441) has a square groove (442), a buckle (443), and a control spring (444) on one side, which are the same as those of the first control lever (440). On the other side of the second control lever (441), there is a linkage wedge (446), and on the linkage wedge (445), there is a third control lever (447), and the third control lever (447) extends toward the wedge (445); The contact ends of the linkage wedge block (445) with the second control lever (441) and the third control lever (447) are all inclined surfaces, and an actuation spring (448) is provided between the linkage wedge block (445) and the inside of the storage compartment (2).

6. A cold chain display cabinet with dual refrigeration methods according to claim 4, characterized in that: The glass cabinet door of the storage compartment (2) is provided with a protrusion (449) corresponding to the buckle (443) on the first control lever (440) and the second control lever (441). The bottom of the protrusion (449) is triangular cone-shaped.

7. A cold chain display cabinet with dual refrigeration methods according to claim 1, characterized in that: The storage compartment (2) is also equipped with two sets of electric push rods (80) for automatically closing the glass cabinet door of the storage compartment (2). The output end of the closed electric push rod (80) is connected to the glass cabinet door, and the fixed end of the closed electric push rod (80) is located on the inner wall of the storage compartment (2).

8. A cold chain display cabinet with dual refrigeration methods according to claim 1, characterized in that: A metal trigger point (60) is provided on the linkage sealing door (40), and a metal trigger point (60) is provided near the linkage vent (51) of the inner liner (5). Both of them have wires extending outward to connect with the closing electric push rod (80). The metal trigger point (60) contacts and triggers the timing.

9. A cold chain display cabinet with dual refrigeration methods according to claim 1, characterized in that: A detector (7) is installed in the height direction of the storage compartment (2) and the glass cabinet door.

10. A cold chain display cabinet with dual refrigeration methods according to claim 4, characterized in that: The wedge block (445) is slidably mounted on the guide post (4450), which is located on the inner wall of the storage compartment (2). The inner liner (5) also has a groove for the movement of the buckle block (443).

Images