Multi-view horizontal refrigerator

Abstract

The application relates to the technical field of refrigeration equipment, and provides a multi-window horizontal refrigerator, which comprises a cabinet body, a cabinet opening structure is arranged on the cabinet body, the cabinet opening structure is made of hard plastic, the cabinet opening structure is in an inclined state with the front being low and the back being high, a stand is arranged at the corner of the front side of the cabinet opening structure, a window with a top opening is installed on the cabinet opening structure, a cabinet door is assembled on the window, the window comprises a frame structure and a window glass, the frame structure is made of metal material and comprises a front window frame located at the front side of the cabinet body, side window frames located at the left and right sides of the cabinet body and a support frame connecting the front window frame and the side window frames, the support frame is fixedly connected with the stand, a giving-way groove matched with the shape of the stand is arranged at the inner corner of the support frame, the stand is embedded in the giving-way groove, a heat insulation partition is formed at the corner in the window, the heat bridge transmission between the metal support frame and the inside and outside of the cabinet body is effectively blocked, and the cold quantity loss and energy consumption are reduced.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to a multi-window horizontal freezer. Background Technology

[0002] Horizontal freezers are widely used in supermarkets, convenience stores, fresh food markets, and other commercial establishments for displaying and storing frozen foods. The temperature of these freezers is typically -18℃ to -25℃. Traditional horizontal freezers rely solely on a top glass door for display, requiring customers to look down to see the products inside. This is inconvenient for shorter children, the elderly, or those with mobility issues, resulting in a lower sales conversion rate for the products inside.

[0003] CN207262805U discloses a horizontal refrigerated display case with an air duct, featuring a viewing window on the front side of the cabinet. However, the single-sided glass window design limits the display angle of goods, preventing multi-angle product display. Existing multi-sided glass window designs suffer from poor sealing, affecting refrigeration efficiency and structural stability, and the connection between the glass window and the main body of the refrigerator is not robust enough. Furthermore, condensation easily forms on the windows, affecting the display effect. Therefore, heating wires need to be embedded within the glass of the side windows to heat the glass and remove surface condensation. Current heating wires operate at full power and continuously; whenever the refrigerator is turned on, all window heating wires operate at rated power continuously. Window heating energy consumption accounts for 20%-30% of the total refrigerator energy consumption, severely impacting the product's energy efficiency rating. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a multi-window horizontal refrigerator, characterized in that it comprises: a cabinet body having a receiving chamber, a cabinet opening structure made of rigid plastic, the cabinet opening structure being inclined at the front and lower at the back, a column being provided at the corner of the front side of the cabinet opening structure, a top-opening window installed on the cabinet opening structure, a cabinet door being fitted onto the window, the window comprising a frame structure and window glass, the frame structure being made of metal, including a front window frame located at the front of the cabinet body, side window frames located on the left and right sides of the cabinet body, and a support frame connecting the front window frame and the side window frames, the support frame being fixedly connected to the column, and a clearance groove matching the shape of the column being provided at the inner corner of the support frame, the column being embedded in the clearance groove, forming a heat-insulating partition at the inner corner of the window.

[0005] Specifically, the support frame includes a frame body and a wall panel movably connected to the corner of the frame body. The frame body and the wall panel define a cable routing cavity. A reinforcing rib is provided on the inner wall of the cable routing cavity corresponding to the clearance groove. A cable inlet hole is provided at the bottom of the frame body, and a cable outlet hole is provided on the side wall of the frame body.

[0006] Specifically, both ends of the front window frame are fixedly connected to the frame body by bolts;

[0007] The front end of the side window frame is fixedly connected to the support frame by bolts. The rear end of the cabinet structure is provided with a mounting groove corresponding to the threaded hole of the side window frame. The mounting groove is provided with bolt holes. The rear end of the side window frame is fixedly connected to the rear end of the cabinet structure by bolts screwed into the mounting groove. A locking block is provided at the mounting groove, and the locking block is snapped onto the mounting groove.

[0008] Specifically, the support frame is provided with an outer limiting plate near the outer side of the viewing window glass, the column is provided with a first inner limiting plate near the outer side of the viewing window glass, and the support frame is provided with a second inner limiting plate near the inner side of the viewing window glass.

[0009] The cabinet structure is provided with a first limiting groove corresponding to the installation position of the viewing window glass, and a second limiting groove and a third limiting groove are respectively provided below the front viewing window frame and the side viewing window frame.

[0010] The viewing window glass is filled between the cabinet opening structure and the frame structure.

[0011] Specifically, the front window frame, side window frame, support frame, and cabinet opening structure work together to form a four-sided sliding groove on the upper side of the window. The sliding groove has a three-layer stepped structure. The cabinet door is slidably installed in the sliding groove. The first cabinet door and the second cabinet door are slidably installed on the first and second sliding grooves, respectively. A sealing strip is provided between the first cabinet door and the second cabinet door.

[0012] Specifically, a U-shaped groove is provided on the inner side of the front window frame, and slots are provided on the upper and lower sides of the U-shaped groove, in which a supplementary light is engaged.

[0013] Specifically, the viewing window glass includes a front viewing window glass, a left viewing window glass, and a right viewing window glass, all of which are multi-layer hollow viewing window glass. Temperature sensors and heating wires are pre-installed in the viewing window glass. Temperature and humidity sensors are respectively installed on the front viewing window frame and the side viewing window frame. The cables of the viewing window glass and the temperature and humidity sensors are electrically connected to the controller inside the cabinet through the wiring cavity.

[0014] Specifically, the controller collects the ambient temperature and humidity measured by the temperature and humidity sensor to calculate the dew point temperature. Based on the difference between the dew point temperature and the surface temperature of the viewing window measured by the temperature sensor, the controller adjusts the actual output power of the heating wire through the power regulator.

[0015] Specifically, the controller is based on a preset safety threshold. Adjust the heating power of the heating wire The preset security threshold It is directly proportional to air humidity.

[0016] When the difference When this happens, turn off the heating element in the corresponding window;

[0017] when hour, , The heating wire operates at 30%-50% of its rated power P;

[0018] when hour, , The heating wire operates at 70%-100% of its rated power P.

[0019] Specifically, the controller calculates the temperature difference change rate of each window in real time. When the temperature difference change rate of the window is less than the preset change rate threshold, the controller controls the heating wire to operate at the rated power. The change rate threshold of the front window glass is -0.3℃ / min to -0.6℃ / min, and the change rate threshold of the side window glass is -0.6℃ / min to -1.0℃ / min.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention provides a multi-window horizontal freezer, in which a column is set at the front corner of the cabinet opening structure, and a matching clearance groove is set at the inner corner of the support frame, so that the column is embedded in the clearance groove, forming a heat insulation partition at the inner corner of the window, effectively blocking the heat bridge transfer between the metal support frame and the inside and outside of the cabinet, significantly reducing cold loss and energy consumption. At the same time, the column and the support frame are integrated into one, improving the aesthetics of the corner connection structure.

[0022] 2. The window frame is made of metal material, which has high bending stiffness and compressive strength. It can bear the cabinet door that is frequently pushed and pulled and fix the window glass. At the same time, it can apply pressure to the edge of the glass with mechanical pre-tensioning force, forcing the window glass to be squeezed inward. It works with the cabinet opening structure to fill the gap between the glass and the frame structure, achieving a tight multi-layer seal and a firm lock.

[0023] 3. The support frame includes the frame body and the wall panel located at the corner of the frame body. The frame body and the wall panel define the cable routing cavity, providing an independent and concealed wiring space for the cables of the viewing window glass, supplementary lighting and various sensors. The cables are arranged in an orderly manner through the inlet and outlet holes and are quickly connected by plug-in connectors. This not only ensures the aesthetics of the overall structure, but also allows for plugging and unplugging operations by simply removing the wall panel during later maintenance, reducing maintenance difficulty and after-sales costs.

[0024] 4. The freezer controller adjusts the actual output power of the heating wire based on the surface temperature of the viewing window glass and the difference between the viewing window and the dew point temperature. It performs differentiated control for the condensation risk of different viewing window positions, introduces a position weighting coefficient to correct the heating power, and reduces the energy consumption of the viewing window heating by 30%-60% through independent zone control and dynamic power adjustment. This significantly improves the overall energy efficiency level of the freezer, meets the latest national energy efficiency standards and energy-saving policy requirements, and can prevent condensation from occurring in the viewing window, ensuring the best product display effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the window structure assembly according to the first embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the cabinet opening structure and support frame assembly according to the first embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the cabinet opening structure according to the first embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the front structure of the frame according to the first embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the rear structure of the frame according to the first embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the window structure according to the first embodiment of the present invention;

[0031] Figure 7 This is a side view of the first embodiment of the present invention.

[0032] Figure 8 This is a cross-sectional view of the front window of the first embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the window structure assembly according to the second embodiment of the present invention;

[0034] Figure 10 This is a cross-sectional view of the side window of the second embodiment of the present invention.

[0035] Attached reference numerals: 1. Cabinet body; 2. Cabinet opening structure; 21. Upright column; 22. Mounting groove; 23. Locking block; 24. First limiting groove; 25. Baffle; 26. First inner limiting plate; 3. Viewing window; 31. Front viewing window frame; 311. U-shaped groove; 312. Supplementary light; 313. Second limiting groove; 314. Inner baffle; 32. Side viewing window frame; 321. Third limiting groove; 33. Support frame; 331. Frame body; 332. Wall panel; 333. Outer limiting plate; 334. Clearance groove; 335. Cable inlet hole; 336. Cable outlet hole; 337. Reinforcing rib; 338. Second inner limiting plate; 34. Front viewing window glass; 35. Side viewing window glass; 36. Slide rail; 4. Cabinet door; 41. First cabinet door; 42. Second cabinet door. Detailed Implementation

[0036] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0037] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] This invention provides a multi-window horizontal freezer, comprising a cabinet body 1, a cabinet opening structure 2 on the cabinet body 1, a top-opening viewing window 3 installed on the cabinet opening structure 2, and a cabinet door 4 fitted onto the viewing window 3. The viewing window 3 is located in the side wall of the freezer, allowing users to intuitively see the items inside the freezer from multiple directions through the viewing window 3, facilitating user selection. It is applicable to horizontal freezers used in freezing conditions such as ice cream freezers. While ensuring good heat insulation performance and low energy consumption, it provides users with viewing windows 3 to see the goods inside the freezer. This allows users to directly view the goods from a distance without having to approach, and also makes it convenient for shorter users, such as children, to directly view and select goods through the viewing window 3.

[0039] Example 1

[0040] The cabinet 1 contains an inner liner for storing items. An opening is located at the top of the cabinet 1, and a cabinet opening structure 2 is installed at the opening. Cabinet opening structure 2 is made of rigid plastic materials such as PVC. The opening and cabinet opening structure 2 are inclined, with the front lower than the back. Viewing windows 3 are installed on the front and left and right sides of cabinet opening structure 2. Inclined storage racks can be built on cabinet opening structure 2, and items such as ice cream buckets can be placed in these racks. The cabinet 1 preferably uses a direct-cooling refrigeration system. A coiled evaporator is wrapped around the outer periphery of the inner liner. The evaporator pipes are correspondingly wrapped around the outer periphery of the storage racks, and the evaporator pipes are also arranged inclined, with the front lower than the back, and are nearly parallel to cabinet opening structure 2.

[0041] The viewing window 3 comprises viewing glass and a frame structure. The viewing glass is fixedly installed between the cabinet opening structure 2 and the frame structure, including a front viewing window 34 located on the front side of the cabinet 1 and side viewing windows 35 located on the left and right sides of the cabinet 1 respectively. The viewing glass is double-layered, triple-layered, or other multi-layered insulated tempered coated glass with anti-fingerprint treatment. A temperature sensor is pre-installed on the inner surface of the outermost glass layer, located in the lower 1 / 3 area of ​​the inner surface of the outermost glass layer, for measuring the glass surface temperature. A heating wire is installed in the viewing window 3. The heating wire can be embedded within the insulated glass layer or applied to the outer surface of the outermost glass layer near both ends. Low-radiation heating wires are preferred, ensuring uniform heating without obstructing the view. The temperature sensor is electrically connected to a controller. The heating wires of each viewing window are electrically connected to the controller via a power regulator. The power regulator uses a PWM power regulation module to adjust the operating power of each heating wire. A temperature sensor measures the surface temperature of the glass. When the surface temperature of the glass is lower than the dew point temperature, the controller uses a heating wire to heat the outer glass, making the temperature of the outer glass higher than the dew point temperature, thus preventing condensation from forming on the glass surface and affecting the user's view of the goods inside the cabinet.

[0042] Furthermore, an alarm module can be installed, including LED indicator lights and a buzzer, located on the control panel of the freezer. This module is used to issue an audible and visual alarm signal when the heating wire malfunctions. The fault detection module determines the fault condition of the heating wire based on the magnitude of the heating wire current collected at a preset frequency. When the operating current of a heating wire deviates from its rated current range by ±20% for more than 10 seconds, a corresponding heating wire fault alarm signal is generated in window 3 to alert the staff. This allows the staff to detect the heating wire fault in a timely manner and avoid the impact on business operations due to condensation in window 3.

[0043] The frame structure is made of metal materials such as aluminum alloy, including a front window frame 31 located at the front of the cabinet 1, side window frames 32 located on the left and right sides of the cabinet 1, and a support frame 33 connecting the front window frame 31 and the side window frames 32. The metal frame structure has high bending stiffness and compressive strength. While bearing the cabinet door 4 which is frequently pushed and pulled and fixing the window glass, it applies pressure to the edge of the glass with mechanical pre-tensioning force, forcing the window glass to be squeezed inward to fill the gap between the glass and the frame structure, thus achieving a tight multi-layer seal and a firm lock.

[0044] A column 21 is provided at the corner of the front side of the cabinet structure 2 to fix the window frame to the cabinet structure 2 and to provide internal support for the installation of the window glass. A support frame 33 is fixedly connected to the column 21. The support frame 33 and the column 21 cooperate to limit the glass position, and the window glass with heating wire and sensor is electrically connected to the controller inside the cabinet 1 via the support frame 33. The support frame 33 includes a frame body 331 and a wall panel 332 movably connected to the side wall of the frame body 331. The wall panel 332 is located at the corner of the frame body 331. The frame body 331 and the wall panel 332 enclose a wiring cavity. The wall panel 332 is connected to the frame body 331 by hinges or snaps to close the wiring cavity. The frame 331 is installed on the outside of the column 21. A clearance groove 334 is provided at the corner of the frame 331 away from the wall panel 332. The column 21 is embedded in the clearance groove 334 and is fixedly connected to the support frame 33 by multiple bolts in the wiring cavity. The bottom of the support frame 33 is also provided with bolt holes. The support frame 33 is fixedly installed to the cabinet opening structure 2 by bolts. The support frame 33 is provided with an outer limiting plate 333 near the outer side of the window glass, the column 21 is provided with a first inner limiting plate 26 near the outer side of the window glass, and the support frame 33 is provided with a second inner limiting plate 338 near the inner side of the window glass. The second inner limiting plate 338 is located above the first inner limiting plate 26. The first inner limiting plate 26 and the second inner limiting plate 338 are spliced ​​together to form a continuous inner support. The inner limiting plate and the outer limiting plate 333 cooperate to form a groove that clamps and limits the front and rear positions of the window glass. The left and right ends of the window glass are embedded between the inner limiting plate and the outer limiting plate 333.

[0045] A temperature and humidity sensor is installed on the outer side of the window frame, at least on the outer side of the front window frame 31, to measure the temperature and humidity of the external environment. Preferably, temperature and humidity sensors are installed on the outer sides of the side window frame 32 and the front window frame 31, respectively, at the center of the front window frame 31 and the side window frame 32, to measure the current air temperature and humidity near the front window and the side window, respectively. The temperature and humidity sensor is electrically connected to a controller. The controller calculates the dew point temperature based on the current temperature and humidity, and controls a heating wire to heat the glass surface when the temperature sensor detects that the current glass surface temperature is lower than the dew point temperature, thereby preventing condensation on the window 3 by raising the glass surface temperature above the dew point temperature.

[0046] The support frame 33 has an inlet hole 335 at its bottom. Cables with first connectors extend into the wiring cavity through the inlet hole 335. The side wall of the support frame 33 has an outlet hole 336. Cables for the front window glass 34, side window glass 35, supplementary light 312, and sensors connect to the wiring cavity through the outlet hole 336. The ends of the cables of each component are equipped with matching second connectors. By connecting the first connector and the second connector at the wiring cavity, the window glass, supplementary light 312, and sensors are connected to the controller and power supply within the wiring cavity, facilitating cable routing and connection. For later cable maintenance, glass replacement, or supplementary light 312 replacement, the connectors can be directly plugged in and unplugged by disassembling the wall panel 332, making disassembly and maintenance convenient and reducing the difficulty of after-sales repair. After the cover plate 332 is closed, the bolts, cables and connectors connecting the front window frame 31 and the side window frame 32 to the frame 331 are all hidden in the closed wiring cavity, ensuring the aesthetics of the overall structure.

[0047] In addition, since low-temperature air has a higher density and tends to move downwards, while high-temperature air has a lower density and tends to move upwards, the temperature on the lower part of the window 3 is lower. The support column 21 is set to prevent the formation of thermal bridges in the lower part of the window 3. The plastic material with a low thermal conductivity isolates the lower part of the support frame 33 from the inside of the cabinet 1, thereby reducing the energy consumption of the freezer.

[0048] The column 21 and the support frame 33 work together to form a slot, ensuring the stability of the window glass installation. At the same time, the column 21 shields the inside of the support frame 33, preventing the low-temperature air below from being conducted to the outside through the support frame 33, which would increase energy consumption. It also integrates the column 21 and the support frame 33 into one, improving the aesthetics of the corner connection structure.

[0049] The front window frame 31, side window frame 32, support frame 33, and cabinet opening structure 2 work together to form a four-sided sliding groove 36 on the upper side of the window 3. The cabinet door 4 is slidably installed in the sliding groove 36. The sliding groove 36 has a three-layer stepped structure. The first cabinet door 41 and the second cabinet door 42 are slidably installed on the first and second layers, respectively. A sealing strip is provided between the first cabinet door 41 and the second cabinet door 42. The second and third sliding grooves of the front window frame 31 are respectively provided with threaded holes, and corresponding bolt holes are provided in the frame 331. The left and right ends of the front window frame 31 are fixedly connected to the support frame 33 by bolts. Threaded holes are provided in any two layers of sliding grooves 36 of the side window frame 32, and corresponding bolt holes are provided in the frame 331. The front end of the side window frame 32 is fixedly connected to the support frame 33 by bolts. The rear end of the cabinet opening structure 2 is provided with a mounting groove 22 corresponding to the position of the threaded holes of the side window frame 32. The mounting groove 22 is provided with bolt holes. The rear end of the side window frame 32 is fixedly connected to the rear end of the cabinet opening structure 2 by bolts screwed into the mounting groove 22, thereby realizing the fixed connection between the side window frame 32, the support frame 33, and the cabinet opening structure 2. A locking block 23 is provided at the mounting groove 22. The locking block 23 is snapped onto the mounting groove 22, hiding the mounting groove 22 to improve the aesthetics of the cabinet structure.

[0050] The front window frame 31 is also equipped with a supplementary light 312. The first layer of the front window frame 31 has a U-shaped groove 311 on the side away from the front window glass 34. The upper and lower sides of the U-shaped groove 311 are provided with slots, in which the supplementary light 312 is engaged. The supplementary light 312 can be an LED light strip, which is directed towards the goods inside the cabinet to illuminate the goods and improve the display effect.

[0051] In cabinet structure 2, a first limiting groove 24 is provided at the installation positions corresponding to the front viewing window glass 34 and the side viewing window glass 35. A second limiting groove 313 and a third limiting groove 321 are respectively provided below the front viewing window frame 31 and the side viewing window frame 32. The limiting plate cooperates with the limiting groove to confine the glass to the limiting groove on all four sides, ensuring the stability of the viewing window glass installation. A baffle 25 is provided at the rear end of cabinet structure 2 to limit the narrow rear end of the side viewing window glass 35.

[0052] During the assembly of window 3, the supplementary light 312 is pre-installed on the front window frame 31. First, the frame 331 and the column 21 are connected with bolts. Then, the front window glass 34 and the side window glass 35 are vertically inserted into the groove formed by the inner limiting plate and the outer limiting plate 333. The cable located at the edge of the glass extends into the wiring cavity from the cable outlet 336. After the glass is positioned, the front window frame 31 and the side window frame 32 are installed and the bolts are tightened. As the frame structure is tightened, pressure is applied to the edge of the glass. The edges of the frame and the edge of the glass fit tightly together, forcing the glass to be squeezed inward to fill the gap between the glass and the frame structure, achieving a tight multi-layer seal and a firm lock, forming a stable U-shaped integrated window 3 system. Then, the cables are connected at the support frame 33. The cables of the window glass and the supplementary light 312 are electrically connected to the cables reserved in the cabinet 1 to meet the lighting and supplementary lighting requirements. After the connection is completed, the wall panel 332 is closed to complete the assembly of window 3.

[0053] Example 2

[0054] As shown in the figure, in Embodiment 2, the window glass is externally attached by adhesive to achieve the fixation of the window glass and the frame structure.

[0055] Compared to Embodiment 1, the cabinet structure 2 lacks the first limiting groove 24 and baffle 25, the front window frame 31 and the side window frame 32 lack the second limiting groove 313 and the third limiting groove 321, and the inner sides of the front window frame 31 and the side window frame 32 are respectively provided with inner baffles 314, while the support frame 33 lacks an outer limiting plate 333. The inner baffle 314, the first inner limiting plate 26, the second inner limiting plate 338, and the surfaces of the cabinet structure 2 corresponding to the installation positions of the window glass are coated with a sealant layer, such as silicone structural sealant. A pressure strip 37 is also provided along the circumferential direction on the outer edge of the window glass, and the pressure strip 37 is fixedly connected to the cabinet structure 2 and the window frame by bolts. The window glass is fixed by the sealant layer and the pressure strip 37, achieving stable installation and reliable sealing of the three-sided glass window 3.

[0056] Temperature and humidity sensors are respectively installed on the outer sides of the side window frame 32 and the front window frame 31. The difference between the surface temperature Ts and the dew point temperature Td can be calculated based on the temperature and humidity information collected by each temperature and humidity sensor. According to the difference The operating power of each heating element can be independently adjusted to provide differentiated control over the risk of condensation at different viewing windows. Details are as follows:

[0057] S1: Collect the first ambient temperature corresponding to the front window glass based on a preset frequency. and first relative humidity The second ambient temperature corresponding to the left viewing window glass Second relative humidity The third ambient temperature corresponding to the right-side window glass and third relative humidity .

[0058] S2: Based on the ambient temperature and relative humidity data near each window, the Magnus formula is used to calculate the dew point temperature corresponding to the front window, left window, and right window respectively. , , .

[0059] S3: Detect the temperature of the first surface of the front glass window respectively. The second surface temperature of the left glass window The third surface temperature of the right-side glass window ;

[0060] S4: For each window, calculate the difference between its surface temperature Ts and dew point temperature Td. , And based on the difference The operating power of the corresponding heating wire can be adjusted independently.

[0061] The front, left, and right windows each have a weighting factor. , and ,in Heating power of each window based on weighting coefficients Make corrections to obtain the actual output power. , Front window glass weighting coefficient The preferred value is 1.1-1.3, and the weighting coefficient for the left window glass is... and the weighting factor of the right window glass The optimal value is 0.7-0.9. A position weighting coefficient is introduced to correct the heating power, ensuring that there is no condensation in any viewing window under any environmental conditions, thus guaranteeing the best product display effect.

[0062] Step S4 also includes: setting a preset safety threshold. ,when When, turn off the heating wire in the corresponding window; when At that time, control the heating power of the corresponding heating wire. Operating at 30%-50% of rated power P , ;when At that time, control the power of the corresponding heating wire. Operating at 70%-100% of rated power P, , Preset security threshold The optimal value is 1.5℃-4.5℃, taking into account practical engineering factors such as sensor measurement error, uneven temperature distribution on the glass surface, ambient airflow fluctuations, and control hysteresis. At temperatures below 1.5℃, condensation is easily caused by the factors mentioned above; when Temperatures above 4.5℃ will cause unnecessary energy waste; a further optimized temperature is 3℃, achieving optimal energy saving while ensuring anti-condensation effectiveness. (Preset safety threshold) It can be dynamically adjusted according to the relative humidity of the environment, and is directly proportional to the humidity. hour, ;when hour, ;when hour, .

[0063] Furthermore, step S4 also includes: calculating the temperature difference change rate V of each window in real time; when the temperature difference change rate of a certain window is less than a preset change rate threshold, immediately switching the heating wire of that window to full power operation, continuing for a preset time, and then restoring normal control logic; wherein, the change rate threshold of the front window glass is less than the change rate thresholds of the left and right window glass. When the freezer door is opened, a large amount of hot and humid air enters the freezer, and cold air overflows from the top opening along the front side wall, causing the surface temperature of the front window glass to drop rapidly, and the temperature difference ΔT to decrease sharply within a short time t. If control is based solely on the absolute value of ΔT, the heating wire will start with a lag, easily leading to condensation on the window.

[0064] Predicting full-power triggering steps: The controller calculates the rate of temperature change for each window in real time.

[0065] ,

[0066] When the temperature difference change rate of a certain window is less than the preset change rate threshold, the heating wire of that window is immediately switched to rated power operation, and after a preset time t, the normal control logic is restored.

[0067] The preset rate of change threshold is set differently based on the viewing window position. The front viewing window glass directly faces the door opening direction and is most affected by heat and humidity shock, therefore a higher sensitivity is set, i.e., a smaller rate of change threshold. The side viewing windows are less affected by door opening, therefore a lower sensitivity is set to avoid accidental triggering of full-power heating. (Front viewing window rate of change threshold) The value ranges from -0.3℃ / min to -0.6℃ / min, with -0.4℃ / min being preferred; the threshold values ​​for the rate of change of the left and right viewing windows. The value is -0.6℃ / min to -1.0℃ / min, preferably -0.8℃ / min. The preset time t is 1min to 5min, preferably 2min.

[0068] The working state of the heating wire is adjusted based on the temperature difference change rate. By detecting the temperature difference change rate, the risk can be predicted in advance before condensation occurs, and full-power heating is started immediately to effectively avoid instantaneous condensation.

[0069] Further, in some embodiments, the heating power of the heating wire can also be adjusted in combination with the internal temperature of the cabinet. The controller collects the storage temperature Tc measured by the internal temperature sensor of the cabinet, and when the controller calculates the heating power , the internal temperature correction coefficient of the cabinet is introduced . When Tc≤-18℃, ; when -18℃<Tc≤-10℃, ; when Tc>-10℃, . This solution further considers the influence of the internal temperature of the cabinet on the condensation of the viewing window, can achieve more accurate anti-condensation control, and the energy-saving effect can be further increased by 5%-10%.

[0070] Compared with the traditional full-power full-time heating scheme for the viewing window defogging method, the present invention can reduce the heating energy consumption of the viewing window by 30%-60% through partition independent control and dynamic power adjustment, significantly improve the overall energy efficiency grade of the freezer, and meet the energy efficiency standards and energy-saving requirements. The power of the heating wire is dynamically adjusted according to actual needs, which greatly reduces the operation time and full-load operation time of the heating wire, the service life of the heating wire can be extended by 2-3 times, and the product maintenance cost is effectively reduced.

[0071] The above descriptions are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed by the present invention shall be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A multi-window horizontal freezer, characterized in that, include: The cabinet (1) has a accommodating chamber. A cabinet opening structure (2) is provided on the cabinet (1). The cabinet opening structure (2) is made of hard plastic and is inclined at the front and back. A column (21) is provided at the corner of the front side of the cabinet opening structure (2). A top-opening viewing window (3) is installed on the cabinet opening structure (2). A cabinet door (4) is fitted on the viewing window (3). The viewing window (3) includes a frame structure and viewing glass. The frame structure is made of metal. Includes a front window frame (31) located on the front side of the cabinet (1), side window frames (32) located on the left and right sides of the cabinet (1), and a support frame (33) connecting the front window frame (31) and the side window frames (32). The support frame (33) is fixedly connected to the column (21). The inner corner of the support frame (33) is provided with a relief groove (334) that matches the shape of the column (21). The column (21) is embedded in the relief groove (334) to form a heat insulation partition at the inner corner of the window (3).

2. The multi-window horizontal freezer according to claim 1, characterized in that, The support frame (33) includes a frame (331) and a wall panel (332) movably connected to the corner of the frame (331). The frame (331) and the wall panel (332) define a cable routing cavity. A reinforcing rib (337) is provided on the inner wall of the cable routing cavity corresponding to the clearance groove (334). A cable inlet hole (335) is provided at the bottom of the frame (331), and a cable outlet hole (336) is provided on the side wall of the frame (331).

3. The multi-window horizontal freezer according to claim 2, characterized in that, The two ends of the front window frame (31) are fixedly connected to the frame (331) by bolts; The front end of the side window frame (32) is fixedly connected to the support frame (33) by bolts. The rear end of the cabinet structure (2) is provided with a mounting groove (22) corresponding to the threaded hole of the side window frame (32). The mounting groove (22) is provided with bolt holes. The rear end of the side window frame (32) is fixedly connected to the rear end of the cabinet structure (2) by bolts screwed into the mounting groove (22). The mounting groove (22) is provided with a locking block (23), which is snapped onto the mounting groove (22).

4. The multi-window horizontal freezer according to claim 1, characterized in that, The support frame (33) is provided with an outer limiting plate (333) near the outer side of the window glass, the column (21) is provided with a first inner limiting plate (26) near the outer side of the window glass, and the support frame (33) is provided with a second inner limiting plate (338) near the inner side of the window glass. The cabinet structure (2) is provided with a first limiting groove (24) corresponding to the installation position of the window glass, and a second limiting groove (313) and a third limiting groove (321) are respectively provided below the front window frame (31) and the side window frame (32). The viewing window glass is filled between the cabinet opening structure (2) and the frame structure.

5. The multi-window horizontal freezer according to claim 1, characterized in that, The front window frame (31), side window frame (32), support frame (33) and cabinet opening structure (2) cooperate to form a four-sided sliding groove (36) on the upper side of the window (3). The sliding groove (36) has a three-layer stepped structure. The cabinet door (4) is slidably installed in the sliding groove (36). The first cabinet door (41) and the second cabinet door (42) are slidably installed on the first sliding groove and the second sliding groove, respectively. A sealing strip is provided between the first cabinet door (41) and the second cabinet door (42).

6. The multi-window horizontal freezer according to claim 5, characterized in that, The inner side of the front window frame (31) is provided with a U-shaped groove (311), and the upper and lower sides of the U-shaped groove (311) are provided with slots, in which a fill light (312) is engaged.

7. The multi-window horizontal freezer according to claim 2, characterized in that, The viewing window glass includes a front viewing window glass (34), a left viewing window glass and a right viewing window glass, all of which are multi-layer hollow viewing window glass. Temperature sensors and heating wires are pre-installed in the viewing window glass. Temperature and humidity sensors are respectively installed on the front viewing window frame (31) and the side viewing window frame (32). The cables of the viewing window glass and the temperature and humidity sensors are electrically connected to the controller inside the cabinet (1) through the wiring cavity.

8. The multi-window horizontal freezer according to claim 7, characterized in that, The controller collects the ambient temperature and humidity measured by the temperature and humidity sensor to calculate the dew point temperature. Based on the difference between the dew point temperature and the surface temperature of the viewing window measured by the temperature sensor, the controller adjusts the actual output power of the heating wire through the power regulator.

9. The multi-window horizontal freezer according to claim 8, characterized in that, The controller is based on a preset safety threshold. Adjust the heating power of the heating wire The preset security threshold It is directly proportional to air humidity. When the difference When this happens, turn off the heating element in the corresponding window; when hour, , The heating wire operates at 30%-50% of its rated power P; when hour, , The heating wire operates at 70%-100% of its rated power P.

10. The multi-window horizontal freezer according to claim 8, characterized in that, The controller calculates the temperature difference change rate of each window in real time. When the temperature difference change rate of the window is less than the preset change rate threshold, it controls the heating wire to operate at the rated power. The change rate threshold of the front window glass is -0.3℃ / min to -0.6℃ / min, and the change rate threshold of the side window glass is -0.6℃ / min to -1.0℃ / min.

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