Adjustable anti-condensation cold chain display cabinet

Abstract

The invention relates to the field of refrigerated cabinets, in particular to an adjustable anti-condensation cold chain display cabinet which comprises a cabinet body and a plurality of layers of shelves, the whole cabinet body is in a [-shaped opening shape, and a heater is arranged on a horizontal section of the upper side of the cabinet body; according to the invention, through mutual cooperation between the adjusting part and the heating part, a plurality of hot air curtains from top to bottom can be formed on the opening side of the cabinet body in time through switching of the upper and lower air channels in the process that the cold air environment in the cabinet body is invaded by external wet and hot water vapor, so that continuous invasion of external moisture is effectively blocked; and after the environment in the cabinet body is adjusted, the adjusting piece controls the upper air duct and the lower air duct to recover and controls the heating part to stop generating heat at the same time, so that the heating part is automatically started and stopped, and the effects of saving energy and reducing consumption are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigerated cabinets, in particular to a cold chain display cabinet capable of adjusting condensation. BACKGROUND

[0002] China has a vast territory, and the climate difference between the north and south is significant. The climate conditions in different regions of the world are also very different. Especially in the high-temperature and high-humidity environment in the south in summer and the temperature and humidity difference caused by different climates in different regions, the existing cold chain display cabinet lacks targeted condensation prevention design at the air outlet and cold-heat alternating position in the cabinet, and the temperature and humidity control precision is limited. Therefore, the temperature difference between the environment humidity and the low temperature in the cabinet is easily formed, and then condensation is easily generated. These condensations not only affect the normal operation of the display cabinet, but also may drip on the displayed goods, causing the goods to be damp and damaged, and causing economic losses.

[0003] With the development of science and technology, the technical personnel in the relevant field have also optimized the technology of the cold chain display cabinet for condensation prevention. In order to make a more accurate comparison, a kind of air-cooled horizontal anti-condensation display cabinet is disclosed in Chinese patent No. CN112471829A, which comprises a cabinet body, a door body, a step part, a refrigeration face cover, a baffle, a folding plate and a return air duct, etc. When in use, the evaporator compartment formed between the inner container and the refrigeration air cover, and the air outlet opened in the refrigeration face cover, realize the effect of air cooling, solve the problem of poor refrigeration effect and use experience of the existing direct-cooling display cabinet, and solve the problem of easy condensation of the existing cabinet door by setting the outer cabinet door and the inner cabinet door.

[0004] However, the above-mentioned display cabinet still has some deficiencies in the actual use process: The above-mentioned prior art forms cold air through an evaporator assembly, and guides the cold air to directly blow to the stored goods, avoids the cold air from directly blowing to the cabinet door, and forms a heat insulation effect through the upper and lower distributed upper and lower cabinet doors, effectively avoids the problem of large temperature difference between the inside and outside of the door body causing condensation. When in use, the above-mentioned prior art needs to be implemented based on the state that the display cabinet is closed by the upper and lower cabinet doors. The air inside the display cabinet will not exchange much heat with the outside world, and the internal environment is relatively stable. When it is applied to an open or semi-open display cabinet in a supermarket, the airtight heat insulation of the cabinet door is not conducive to the display and exhibition of goods, and the cold air is easy to spread to the outside world in an open environment. After the high-temperature moisture in the environment contacts with the low-temperature cold air or the cabinet body in the display cabinet, condensation is easily generated due to the temperature difference. Not only does it significantly increase the refrigeration energy consumption, but also causes temperature fluctuation due to the loss of cold quantity in the cabinet, which further increases the water vapor condensation phenomenon. That is, although the above-mentioned prior art avoids the condensation caused by the temperature difference between the inside and outside of the display cabinet when it is closed by guiding the direction of the cold air, it cannot effectively avoid the condensation caused by the temperature difference between the inside and outside of the display cabinet when the high-temperature moisture in the outside world invades the open display cabinet.

[0005] Therefore, based on the above-mentioned viewpoints, there is still room for improvement in existing technologies for preventing condensation in cold chain display cabinets. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides an adjustable anti-condensation cold chain display cabinet, comprising a cabinet body and several shelves, characterized in that: the cabinet body is generally U-shaped with an opening, and a heater is provided on the upper horizontal section thereof, the heater comprising: The mounting panel is fixed to the upper side of the cabinet. The mounting panel divides the space in the upper horizontal section of the cabinet into upper and lower layers, which are referred to as the upper air duct and the lower air duct respectively. Several air outlets are evenly formed on the cabinet corresponding to the lower air duct. The air outlets are evenly distributed along the width of the mounting panel. The upper air duct is connected to the outside through the lower air duct. Several heating elements are also installed on the cabinet corresponding to the air outlets.

[0007] An air guide plate located on the side of the mounting panel away from the cabinet opening, which guides the airflow path within the cabinet.

[0008] And an adjustment component that drives the air guide plate to alternately block the upper and lower air ducts, so as to guide the upper and lower air ducts to alternately connect with the cabinet back panel.

[0009] Preferably, the adjusting component includes several connecting plates connected to the air guide plate, and the several connecting plates are connected together by a linkage plate, and the linkage plate is connected to an adjusting screw threaded through the cabinet.

[0010] Preferably, the mounting panel is spaced apart from the cabinet body on the side closest to the cabinet opening.

[0011] Preferably, the number of the aforementioned air outlets gradually decreases from the cabinet opening towards the back panel.

[0012] Preferably, the air guide plate includes a fixed plate fixed between the mounting panel and the cabinet, and a baffle plate that slides on the fixed plate. Several connecting plates are connected to the baffle plate and slide through the fixed plate. The fixed plate forms several vertical air guide grooves for the connecting plates to slide and adjust.

[0013] Preferably, the mounting panel is provided with a sliding stop plate on the side away from the fixed plate, which is connected to the linkage plate. The sliding stop plate slides and abuts against the cabinet and the mounting panel.

[0014] Preferably, the linkage dial plate is connected to a control electrode block, and contact electrode blocks are spaced apart in the cabinet corresponding to the control electrode blocks on the linkage dial plate. Both the contact electrode blocks and the control electrode blocks are electrically connected to the heating unit.

[0015] Preferably, the mounting panel is symmetrically spaced on both sides by a plurality of mounting blocks, and a plurality of heating portions are correspondingly arranged between the two mounting blocks opposite to each other.

[0016] Preferably, the opening side of the cabinet body is further provided with a lamp holder plate, and a condensation prevention sensor is arranged at the lamp holder plate.

[0017] In summary, the present application has at least one of the following beneficial technical effects: Firstly, the present application can form a plurality of hot air flow curtains from top to bottom at the opening side of the cabinet body through the switching of the upper and lower air ducts in the process of the cold air environment in the cabinet body being invaded by external humid hot steam, effectively block the continuous invasion of external humidity, avoid the condensation damage to the product caused by the imbalance of the cabinet environment, and after the adjustment of the environment in the cabinet body is completed, the adjustment member controls the upper and lower air ducts to restore, and the heating portion stops heat production, thereby realizing the automatic start and stop of the heating portion and the effect of energy saving and consumption reduction.

[0018] Secondly, the present application divides the upper side of the cabinet body into an upper air duct and a lower air duct through a mounting panel, and forms a hot air flow barrier at the opening side of the cabinet body through the switching cooperation of the heater and the upper and lower air ducts, thereby reducing the temperature difference between the inside and outside of the cabinet, avoiding the condensation caused by the direct contact of cold and hot air flow, and effectively guiding the air flow path in the cabinet through the switching cooperation of the upper and lower air ducts, so that in the process of preventing condensation, a part of the air flow maintains low temperature to preserve the product, and a part of the air flow is guided to be heated to block the external humid hot steam, thereby meeting the needs of the display cabinet in preventing condensation and preserving the product. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described below in combination with the drawings and examples.

[0020] Figure 1 is a structural schematic diagram of the present application.

[0021] Figure 2 is a structural schematic diagram of the cabinet body of the present application.

[0022] Figure 3 is a structural schematic diagram of the heater of the present application.

[0023] Figure 4 is a structural schematic diagram of the adjustment member of the present application.

[0024] Figure 5 is a structural schematic diagram of the air deflector of the present application.

[0025] Figure 6 is a structural schematic diagram of the control electrode block of the present application.

[0026] Figure 7 is a structural schematic diagram of the adjustment screw of the present application.

[0027] Figure 8 Figure is a schematic diagram of the connecting slide rod structure of the present application.

[0028] In the figure, 1, cabinet body; 10, shelf; 2, heater; 20, mounting panel; 200, upper air duct; 201, lower air duct; 21, air outlet; 22, heating part; 23, air deflector; 230, fixed plate; 231, blocking plate; 232, air guide groove; 24, adjusting part; 240, connecting lever; 241, linkage lever; 242, adjusting screw; 25, sliding blocking plate; 250, connecting column; 26, control electrode block; 260, contact electrode block; 27, mounting block; 28, lamp holder plate; 29, anti-condensation sensor; 3, connecting slide plate; 30, connecting slide rod; 31, limiting sleeve; 32, guide sliding groove; 33, reset spring; 34, driven sliding block; 35, pressing spring. DETAILED DESCRIPTION

[0029] The following will be described in detail in combination with the accompanying Figure 1 to the accompanying Figure 8 The embodiments of the present application are described in detail.

[0030] The embodiments of the present application disclose a cold chain display cabinet with adjustable anti-condensation. In terms of technical effects, the display cabinet can avoid the invasion of external hot and humid water vapor during the unfolding process, and form condensation in the display cabinet. In particular, during the process of displaying goods in the unfolded display cabinet, the heater actively supplements heat to the cold air discharged from the air outlet of the cabinet body, so as to effectively reduce the temperature difference between the cold air of the cabinet body and the external hot and humid water vapor, thereby avoiding the formation of condensation in the cabinet. Further, the present application also guides the airflow discharged from the air outlet on the upper side of the cabinet body, so that part of the airflow maintains low temperature to preserve the product, and part of the airflow is guided to be heated to block the external hot and humid water vapor. At the same time, the needs of the display cabinet anti-condensation and product preservation are taken into account.

[0031] Embodiment one: refer to Figure 1 and Figure 2 A cold chain display cabinet with adjustable anti-condensation, comprising a cabinet body 1 and a plurality of shelves 10. The cabinet body 1 is in the shape of an open aperture, and a heater 2 is arranged on the horizontal section of the upper side of the cabinet body 1. The heater 2 is used to actively increase the temperature of the display side of the display cabinet opening in the process of the invasion of external hot and humid water vapor, so that the temperature of the display side of the display cabinet opening gradually approaches the temperature of the external hot and humid water vapor, avoiding the direct contact of the external water vapor with the cold air in the display cabinet. Due to the temperature difference between the two, condensation is easily formed in the display cabinet, thereby realizing no condensation in the cabinet and preventing condensation water from damaging goods.

[0032] It should be noted that the display cabinet in this embodiment adopts a conventional air curtain type display cabinet in supermarkets. The air curtain type display cabinet generates low-temperature cold air through a pre-cooling evaporator at the bottom of the cabinet body 1, and blows the low-temperature cold air out of the back plate of the cabinet body 1 through a fan in the cabinet body 1. The air curtain type display cabinet forms a return air passage in the cabinet body 1 area, so that the cold air uniformly covers every corner in the cabinet, so as to achieve the effect of product preservation. At the same time, the air curtain type display cabinet also generates a trapezoidal laminar air curtain in the cabinet body 1 through the fan, and forms an air flow barrier from top to bottom at the cabinet opening, which blocks the external hot air from entering the cabinet, reduces the loss of cold air, and maintains the stability of the temperature in the cabinet.

[0033] Based on the above, when condensation occurs in the display cabinet, the heater 2 is activated, and part of the air flow is sent upward to the heater 2 and is discharged after being heated, thereby forming a hot air flow barrier from top to bottom at the cabinet opening of the display cabinet, avoiding the loss of cold air in the cabinet body 1, and reducing the heat exchange between the cold and hot air flows inside and outside the cabinet to prevent condensation. In this process, the other part of the air flow is not heated by the heater 2, but is sent to the shelves 10 with low-temperature cold air, thereby cooling and preserving the products on the shelves 10.

[0034] Referring to Figures 2 to 5 The heater 2 is used to actively heat the display cabinet. Specifically, the heater 2 includes: The mounting panel 20 is fixed to the upper side of the inside of the cabinet body 1. The mounting panel 20 separates the space in the horizontal section of the upper side of the cabinet body 1 into upper and lower layers, and corresponds to the upper air duct 200 and the lower air duct 201. The cabinet body 1 corresponds to the lower air duct 201 and uniformly forms a plurality of air outlets 21. The plurality of air outlets 21 are uniformly and spaced apart along the width direction of the mounting panel 20. The upper air duct 200 is connected to the outside through the lower air duct 201. A plurality of heating portions 22 are installed at the cabinet body 1 corresponding to the plurality of air outlets 21. The heating portion 22 is preferably an electric heating wire.

[0035] The air deflector 23 is limited to the side of the mounting panel 20 away from the opening of the cabinet body 1, and guides the air flow path in the cabinet body 1.

[0036] The adjusting member 24 drives the air deflector 23 to adjust the alternating blocking of the upper air duct 200 and the lower air duct 201, so as to guide the upper air duct 200 and the lower air duct 201 to alternately communicate with the back plate of the cabinet body 1.

[0037] At the beginning (when condensation is not needed), the air deflector 23 blocks the upper air duct 200, so that the air flow upward from the back plate of the cabinet body 1 is preferentially communicated to the lower air duct 201, and is discharged outward through the plurality of air outlets 21, thereby forming a plurality of air flows from top to bottom on the upper side of the cabinet body 1, and cooling and preserving the products on the plurality of shelves 10 in combination with the air outlet of the back plate.

[0038] When anti-condensation is needed, the baffle 23 is driven by the adjusting piece 24 to block the lower air duct 201, and the air flow is guided to flow into the upper air duct 200 first, and then into the lower air duct 201 and the air outlet 21. In this process, the heating part 22 generates heat, which is actively exchanged with the air flow of lower temperature, thereby increasing the temperature of the air flow blown into the cabinet 1 and reducing the temperature difference between the air flow and the external humid heat.

[0039] Referring to Figure 3 , Figure 6 and Figure 7 , the adjusting piece 24 is used to control the adjustment of the baffle 23. Specifically, the adjusting piece 24 includes two connecting plates 240 connected to the baffle 23, and a linkage plate 241 connected to the side of the two connecting plates 240 away from the baffle 23. The linkage plate 241 is connected with a threaded adjusting screw 242 threaded through the cabinet 1, and the adjusting screw 242 is connected with a driving motor installed on the cabinet 1 after passing through the cabinet 1. In use, the motor drives the adjusting screw 242 to rotate, and through the thread cooperation between the adjusting screw 242 and the cabinet 1, the adjusting screw 242, the linkage plate 241 and the connecting plate 240 are driven to slide in the vertical direction for adjustment, thereby driving the baffle 23 to alternately block the upper air duct 200 and the lower air duct 201.

[0040] Referring to Figure 6 , in order to guide the air flow into the upper air duct 200 and the lower air duct 201, the installation panel 20 is spaced from the cabinet 1 on the side close to the opening of the cabinet 1, so that the upper air duct 200 and the lower air duct 201 can communicate with each other. When anti-condensation is needed, the baffle 23 is driven to adjust the air flow path between the lower air duct 201 and the back plate passage, and the blocking effect of the upper air duct 200 is removed. The air flow is guided to enter the upper air duct 200 first, and then is blown out through the air outlets 21 after entering the lower air duct 201. After the air flow enters the upper side horizontal section of the cabinet 1, the overall flow trajectory presents a snake shape structure with the head and tail connected. Since the air outlets 21 on the upper side of the cabinet 1 are away from the bottom fan, the flow rate of the air flow conveyed by the fan will be lost to a certain extent after passing through the back plate and other paths, and presents a gradient attenuation trend. Therefore, the flow rate of the air flow entering the lower air duct 201 from the upper air duct 200 will gradually attenuate, and the air flow entering the upper air duct 200 from the back plate will first flow towards the opening on the side of the cabinet 1 away from the back plate, and then flow towards the direction close to the back plate while being blown out through the air outlets 21. Therefore, in the process of guiding the air flow to enter the lower air duct 201 from the upper air duct 200, the flow rate of the air flow at the air outlets 21 gradually attenuates from the opening side of the cabinet 1 to the direction close to the back plate, so that the hot air curtain is concentrated on the air outlets 21 close to the opening side of the cabinet 1, thereby avoiding affecting the existing products in the cabinet 1.

[0041] When the anti-condensation is not needed, that is, the air deflector 23 blocks the upper air duct 200, the air flow directly enters the lower air duct 201 through the back plate, and the flow rate of the cold air flow discharged from the air outlets 21 gradually attenuates from the back plate to the opening side of the cabinet 1.

[0042] Further, referring to Figure 3 , the number of air outlets 21 gradually decreases from the opening of the cabinet 1 to the back plate. During normal use, the cold air of lower temperature is discharged from the lower air duct 201 along the air outlets 21, the air outlet 21 at the opening of the cabinet 1 blows a larger flow, which can quickly cover the front end of the display area and form an air flow curtain from top to bottom on the opening side of the cabinet 1, forming a relatively closed air flow environment in the display area of the cabinet 1, effectively preventing the intrusion of external hot and humid air, and effectively avoiding the heat exchange between the cold air in the cabinet 1 and the external hot air. The air outlet 21 near the back plate side of the cabinet 1 blows a smaller flow, which, combined with the horizontal air outlet effect of the back plate of the cabinet 1, avoids the air flow at the air outlet 21 near the back plate of the upper side of the cabinet 1 disturbing the cold air of the back plate, so that the cold air blown by the back plate is more easily covered to all products in the cabinet 1.

[0043] During the anti-condensation process, the air outlet 21 near the opening of the cabinet 1 has a larger number and a larger flow, so that the hot air flow curtain is concentrated in the opening area of the cabinet 1, avoiding condensation caused by temperature difference. Correspondingly, the air outlet 21 near the back plate has a smaller number and a smaller flow, which can also avoid directly delivering more hot air flow to the products inside the cabinet 1 and contacting the cold air sent by the back plate, reducing the probability of condensation of hot air flow in the cabinet 1, realizing no condensation in the cabinet, preventing condensation water from damaging goods, and further improving the anti-condensation effect and energy utilization efficiency.

[0044] Referring to Figure 4 and Figure 5 , in order to drive the air deflector 23 to adjust the blocking of the upper air duct 200 or the lower air duct 201, the air deflector 23 includes a fixed plate 230 fixedly connected between one end of the mounting panel 20 and the cabinet 1, and a blocking plate 231 slidably connected on the fixed plate 230. The blocking plate 231 is slidably connected on the fixed plate 230, the connecting lever 240 is connected with the blocking plate 231 and slides through the fixed plate 230, and the fixed plate 230 forms a plurality of air guide grooves 232 corresponding to the connecting lever 240.

[0045] Initially, the connecting lever 240 is connected with the blocking plate 231 corresponding to the air guide grooves 232, the blocking plate 231 is moved to abut against the fixed plate 230, and the connecting lever 240 abuts against the upper end of the air guide groove 232 to form an initial blocking effect on the space of the upper air duct 200, guiding the air flow to directly flow to the lower air duct 201 and then be discharged through the air outlets 21.

[0046] When anti-condensation is needed, the adjusting screw 242 is driven to rotate, the linkage plate 241, the connecting plate 240 and the blocking plate 231 are driven to move downward, the blocking plate 231 is driven to move downward to block the lower air duct 201, and then the air flow continuously flowing upward from the back plate passes through the air guide grooves 232 on the fixed plate 230 into the upper air duct 200, flows along the upper air duct 200 to the opening of the cabinet 1, and then passes into the lower air duct 201 and tends to continue to flow away from the opening of the cabinet 1, and is discharged through the air outlet 21.

[0047] Further, as shown in Figures 5 to 7 , in order to close the upper air duct 200 at the beginning to avoid the air flow returning from the lower air duct 201 to the upper air duct 200, causing excessive consumption of cold air and increasing the energy consumption of the equipment, a sliding blocking plate 25 corresponding to the linkage plate 241 is arranged on the side of the mounting panel 20 away from the fixed plate 230, the sliding blocking plate 25 is slidably abutted between the cabinet 1 and the mounting panel 20, and is connected to the linkage plate 241 through the connecting column 250. At the beginning, the sliding blocking plate 25 is located at the lower side of the mounting panel 20 and abuts at the interval between the cabinet 1 and the mounting panel 20. When the linkage plate 241 is driven to move downward, the linkage plate 241 drives the sliding blocking plate 25 to move downward synchronously, so that the sliding blocking plate 25 slides to the lower air duct 201 at the same time when the blocking plate 231 unblocks the upper air duct 200, and the upper air duct 200 and the lower air duct 201 are connected to each other.

[0048] When the sliding blocking plate 25 moves upward to the initial position at the lower side of the mounting panel 20, the interval between the cabinet 1 and the mounting panel 20 will be re-closed, the communication path between the lower air duct 201 and the upper air duct 200 will be blocked, the additional lengthening of the air flow path will be avoided to cause energy waste, and at the same time, the sealing preparation for the next air duct switching is completed.

[0049] As shown in Figure 6 and Figure 7 , in order to simultaneously enable the heating part 22 to heat during the process of connecting the upper air duct 200 and the lower air duct 201, a control electrode block 26 is connected to the linkage plate 241, a contact electrode block 260 corresponding to the control electrode block 26 on the linkage plate 241 is arranged on the cabinet 1, the contact electrode block 260, the control electrode block 26 and the heating part 22 are connected to the external controller through electrical connection, and the control electrode block 26 and the contact electrode block 260 are respectively connected to the positive and negative electrodes of the heating part 22. When the control electrode block 26 contacts the contact electrode block 260, a closed loop signal is formed between the heating part 22, the control electrode block 26, the contact electrode block 260, the external controller and the heating part 22, the external controller starts and controls the heating part 22 to heat.

[0050] In use, in the process of driving the linkage plate 241, the connecting plate 240, the sliding resistance plate 25 and the blocking plate 231 to move downward, the blocking plate 231 restores the upper air duct 200 to be in communication with the back plate of the cabinet 1 and blocks the passage between the lower air duct 201 and the back plate of the cabinet 1. The sliding resistance plate 25 restores the upper air duct 200 to be in communication with the lower air duct 201. At the same time, the linkage plate 241 drives the control electrode block 26 to move downward and closely contact the contact electrode block 260. The external controller adjusts the output power of the heating part 22 according to the preset temperature parameter to maintain the heating temperature at 2-3℃ above the dew point temperature. In the process of air flow, the air flow is actively heated to avoid condensation caused by the large temperature difference between the air flow blown out of the cabinet 1 and the external water vapor. The condensation prevention effect is ensured, and the internal temperature fluctuation of the display cabinet is avoided. When the linkage plate 241 moves upward and resets, the control electrode block 26 is separated from the contact electrode block 260, the circuit is disconnected, the heating part 22 automatically stops working, the invalid energy consumption is reduced, and the intelligent control of the air duct switching and heating function is realized.

[0051] Referring to Figure 5 As shown in the figure, the mounting panel 20 is symmetrically spaced and limited by a plurality of mounting blocks 27 on both sides. A plurality of heating parts 22 are correspondingly arranged between the two mounting blocks 27 that are spaced apart, so that the plurality of heating parts 22 are initially limited in the upper air duct 200. After the plurality of heating parts 22 are activated, the heat generated by the plurality of heating parts 22 naturally dissipates in the upper air duct 200 and is fully entrained by the flowing air before entering the lower air duct 201, so that the heat of the discharged air is uniform, avoiding local temperature that is too high or too low to affect the condensation prevention effect and improving the efficiency and stability of active heating.

[0052] Referring to Figure 2 and Figure 3 As an optional embodiment, the lamp holder plate 28 is also installed on the opening side of the cabinet 1. A plurality of LED lamp beads (not shown in the figure) are installed in the lamp holder plate 28. The condensation prevention sensor 29 is installed at the lamp holder plate 28. The condensation prevention sensor 29 controls the driving motor to start and stop through wired or wireless signals. It mainly detects the temperature or humidity change in the cabinet 1. A common temperature and humidity sensor is used. After detecting that the humidity or temperature in the cabinet 1 exceeds the predetermined range (such as triggering the motor start signal when detecting that the humidity on the opening side of the cabinet 1 is ≥85%RH), the output signal controls the driving motor to work, so as to simultaneously activate the heating part to prevent condensation in the cabinet 1. In the process of use, the plurality of LED lamp beads (not shown in the figure) on the lamp holder plate 28 are always on. Due to the characteristics of the LED lamp beads (not shown in the figure), the weak heat generated after the lamp beads are lit can assist in dissipating local low temperature, and at the same time, the display effect is not affected.

[0053] Example two: referring to Figures 5 to 8As shown, on the basis of Embodiment One, in order to improve the uniformity of the temperature rise of the exhaust air flow by several heating portions 22, avoid local temperature too high or too low affecting the anti-condensation effect, the two ends of the two mounting blocks 27 at the same heating portion 22 are jointly connected with the connecting slide plate 3 penetrating the mounting panel 20, the two mounting blocks 27 and the two connecting slide plates 3 at the same heating portion 22 correspond to the frame shape enclosed, the mounting panel 20 corresponds to several connecting slide plates 3 to form several through openings, one of the connecting slide plates 3 on the upper side of the mounting block 27 is connected with the connecting slide rod 30 penetrating out of the cabinet 1 and corresponding to the adjusting screw rod 242, and all the connecting slide plates 3 on the upper side are jointly connected by the connecting rod to synchronously control the sliding adjustment, the connecting slide rod 30 is rotatably connected with the connecting slide plate 3 and slidably connected with the cabinet 1, a section of the connecting slide rod 30 penetrating out of the cabinet 1 is sleeved with the limiting sleeve 31 rotating on the cabinet 1, the connecting slide rod 30 forms the guide sliding groove 32, specifically, the guide sliding groove 32 includes two spiral grooves and a vertical groove, the two spiral grooves and the vertical groove are sequentially spaced and connected end to end, the limiting sleeve 31 is provided with a protruding rod (not shown in the figure) slidingly inserted into the guide sliding groove 32, the limiting sleeve 31 and the adjusting screw rod 242 are cooperated by the synchronous belt transmission, and the limiting sleeve 31 and the connecting slide rod 30 are cooperated with the return spring 33.

[0054] In use, by driving the adjusting screw rod 242 to rotate to drive the linkage plate 241 to move downward, the adjusting screw rod 242 is rotated to drive the limiting sleeve 31 to rotate synchronously by the synchronous belt transmission, the limiting sleeve 31 is rotated to drive the protruding rod (not shown in the figure) and the guide sliding groove 32 on the connecting slide rod 30 to generate a relative position, so that the protruding rod (not shown in the figure) slides in the guide sliding groove 32, when the protruding rod (not shown in the figure) slides along any one of the spiral grooves, the connecting slide rod 30 is driven to rotate along the spiral groove in the rotation direction, and the connecting slide rod 30 is driven to slide downward along the spiral groove, so that the return spring 33 is compressed under stress, when the protruding rod (not shown in the figure) slides into any one of the vertical grooves, the connecting slide rod 30 is driven to move upward and reset under the reset push of the return spring 33, and the protruding rod (not shown in the figure) is driven to slide from the lower side to the upper side of the same vertical groove, and cooperates with the rotation of the limiting sleeve 31 to slide into the spiral groove adjacent to the vertical groove to continue to drive the connecting slide rod 30 to move downward, so as to realize the effect of reciprocating upward and downward sliding of the connecting slide rod 30 when the limiting sleeve 31 rotates, the connecting slide rod 30 slides to drive all the connecting slide plates 3, the mounting blocks 27, the heating portions 22 and the connecting rods to slide synchronously, and drives the heating portions 22 to reciprocate in the upper air duct 200 and the lower air duct 201, so as to accelerate the uniform distribution of the hot air flow in the upper air duct 200 and the lower air duct 201, and effectively improve the uniformity of the temperature rise of the exhaust air flow.

[0055] Further, referring to Figure 6 andFigure 7 As shown, in order to improve the heating efficiency of the hot air flow, the control electrode block 26 is limited on the linkage plate 241 by the driven slider 34, and a pressing spring 35 is cooperated between the driven slider 34 and the control electrode block 26. Initially, the pressing spring 35 is normally stretched, and the control electrode block 26 is spaced from the contact electrode block 260. When the linkage plate 241 is driven to move downward, the linkage plate 241 drives the driven slider 34 and the control electrode block 26 to move downward as a whole. When the control electrode block 26 contacts the contact electrode block 260, the linkage plate 241 is continuously driven to move downward, and the control electrode block 26 is limited by the contact electrode block 260 and cannot continue to move downward. The relative sliding effect between the control electrode block 26 and the driven slider 34 is driven. At this time, with the continuous downward movement of the linkage plate 241, the control electrode block 26 will be limited to have a tendency to slide upward, so that the pressing spring 35 is gradually compressed to provide the control electrode block 26 with a downward pressing force, and the control electrode block 26 is driven to closely contact the contact electrode block 260. In this process, the heating part 22 is always enabled, thereby effectively shortening the starting time of the heating part 22, and cooperating with the reciprocating sliding adjustment of the heating part 22, greatly improving the heating efficiency of the air flow in the upper air duct 200 and the lower air duct 201, and effectively improving the anti-condensation effect of the cabinet 1.

[0056] When working: first step, when the components in the cabinet body 1 are started, the output cold air is discharged from the back plate and the upper side to the product on the shelf 10, guiding the temperature in the cabinet 1 to be reduced, and forming an air flow wind curtain on the opening side of the cabinet 1 by the blown cold air flow, which initially blocks the external humidity.

[0057] Second step: when the temperature or humidity in the cabinet 1 changes to reach the preset threshold value, the heating part 22 is enabled to produce heat to actively warm the blown air flow, reduce the temperature difference between the blown air flow and the external high-temperature and high-humidity air, and avoid condensation in the cabinet and damage to the product.

[0058] Third step: the heating part 22 also synchronously guides the air flow path on the upper side of the cabinet 1 to form a hot air flow wind curtain on the opening side of the cabinet 1, which suppresses the contact heat exchange between the cold air flow in the cabinet 1 and the external environment, avoids the invasion of external hot and humid air, realizes the anti-condensation effect of the cabinet 1, and then the heating part 22 automatically resumes to stop to reduce energy consumption when the temperature or humidity in the cabinet 1 is reduced.

[0059] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view.

[0060] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. An adjustable anti-condensation cold chain display cabinet, comprising a cabinet body (1) and several shelves (10), characterized in that: The cabinet (1) has an overall U-shaped opening, and a heater (2) is provided on the horizontal section on its upper side. The heater (2) includes: The mounting panel (20) is fixed to the upper side of the cabinet (1). The mounting panel (20) divides the space in the upper horizontal section of the cabinet (1) into upper and lower layers, which are referred to as the upper air duct (200) and the lower air duct (201). Several air outlets (21) are evenly formed on the cabinet (1) corresponding to the lower air duct (201). The several air outlets (21) are evenly distributed along the width direction of the mounting panel (20). The upper air duct (200) is connected to the outside through the lower air duct (201). Several heating parts (22) are also installed on the cabinet (1) corresponding to the several air outlets (21). A guide plate (23) is located on the side of the mounting panel (20) away from the opening of the cabinet (1) and guides the airflow path inside the cabinet (1). And an adjustment element (24) that drives the air guide plate (23) to adjust the alternating blocking of the upper air duct (200) and the lower air duct (201) to guide the upper air duct (200) and the lower air duct (201) to alternately connect with the back panel of the cabinet (1).

2. The adjustable anti-condensation cold chain display cabinet according to claim 1, characterized in that: The adjusting component (24) includes several connecting plates (240) connected to the air guide plate (23), and a linkage plate (241) is connected between the several connecting plates (240). An adjusting screw (242) threaded through the cabinet (1) is connected to the linkage plate (241).

3. The adjustable anti-condensation cold chain display cabinet according to claim 1, characterized in that: The mounting panel (20) is spaced apart from the cabinet (1) on the side near the opening of the cabinet (1).

4. The adjustable anti-condensation cold chain display cabinet according to claim 1, characterized in that: The number of air outlets (21) mentioned above gradually decreases from the opening of the cabinet (1) towards the back panel.

5. The adjustable anti-condensation cold chain display cabinet according to claim 2, characterized in that: The air guide plate (23) includes a fixed plate (230) fixed between the mounting panel (20) and the cabinet (1), and a baffle plate (231) that slides on the fixed plate (230). Several connecting plates (240) are connected to the baffle plate (231) and slide through the fixed plate (230). The fixed plate (230) forms several vertical air guide grooves (232) for the connecting plates (240) to slide and adjust.

6. The adjustable anti-condensation cold chain display cabinet according to claim 5, characterized in that: The mounting panel (20) is provided with a sliding stop plate (25) on the side away from the fixed plate (230) and connected to the linkage plate (241). The sliding stop plate (25) slides and abuts against the cabinet (1) and the mounting panel (20).

7. The adjustable anti-condensation cold chain display cabinet according to claim 2, characterized in that: The linkage dial (241) is connected to a control electrode block (26), and the cabinet (1) is provided with contact electrode blocks (260) at intervals corresponding to the control electrode blocks (26) on the linkage dial (241). The contact electrode blocks (260) and the control electrode blocks (26) are both connected to the heating part (22) by electrical connection.

8. The adjustable anti-condensation cold chain display cabinet according to claim 1, characterized in that: The mounting panel (20) has several mounting blocks (27) symmetrically spaced on both sides, and several heating parts (22) are correspondingly arranged between two mounting blocks (27) spaced apart.

9. The adjustable anti-condensation cold chain display cabinet according to claim 1, characterized in that: The cabinet (1) is also equipped with a lamp holder plate (28) on the opening side, and an anti-condensation sensor (29) is installed on the lamp holder plate (28).

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