Multi-temperature-zone temperature control commercial refrigerator

Abstract

The invention discloses a multi-temperature-zone temperature control commercial refrigerator, and relates to the field of commercial refrigerators, the multi-temperature-zone temperature control commercial refrigerator comprises a refrigerator cabinet body and a refrigeration mechanism fixedly arranged at the upper end in the refrigerator cabinet body, a plurality of independent chambers are arrayed in the refrigerator cabinet body, and an air duct cover for discharging cold air and a temperature sensor for detecting temperature are fixedly arranged on the inner wall of each chamber; the refrigerating mechanism comprises a cold air pipeline in the refrigerator cabinet body, a plurality of cold air flow dividing pipes are fixedly arranged in the middle of the cold air pipeline in a penetrating mode, and electric air doors fixedly arranged in the air duct cover are fixedly arranged at the ends, away from the cold air pipeline, of the cold air flow dividing pipes in a penetrating mode. According to the device, by starting the refrigerating mechanism, cold air generated by the evaporator is evenly conveyed to the compartment through the cold air pipeline and the cold air flow dividing pipe; and in cooperation with opening angle adjustment of the electric air door, precise constant temperature control of + / -0.3 DEG C and wide temperature zone setting of 10-24 DEG C of the compartment are achieved, and the problems that a traditional double-temperature-zone refrigerator is single in temperature zone and large in temperature fluctuation are solved.

Description

Technical Field

[0001] This application relates to the fields of freezers, refrigerators, and more specifically to commercial refrigerators, particularly to a multi-temperature zone controlled commercial refrigerator. Background Technology

[0002] Currently, commercial kitchen refrigerators on the market are available in two-door, four-door, and six-door models, with cooling methods including direct cooling and air cooling. However, most commercial kitchen refrigerators are dual-temperature cabinets, meaning they only have two temperature zones: refrigeration and freezing. The refrigeration zone typically operates at 0–10°C, while the freezing zone generally ranges from -10°C to -18°C. However, in commercial kitchens used in the catering industry, due to high food consumption and short storage times, especially for ingredients that need to be cooked within 3–5 days, the freezer is often used. The thawing time after freezing is long, and because ice crystals damage cell structure, juices are lost, resulting in a decrease in taste and nutritional value.

[0003] Commercial kitchen refrigerators traditionally feature dual-temperature zones (refrigeration 0-10℃, freezing -10 to -18℃). However, coffee shops, milk tea shops, convenience stores, and other settings have diverse storage temperature requirements for beverage ingredients (such as ice cubes at -18℃, iced coffee at 4℃, smoothies at -5℃, and ice cream at -15℃), making it difficult for existing dual-temperature zones to meet precise temperature control requirements. To address the need for multiple temperature zones, current technologies often use combinations of multiple single-temperature-zone refrigerators, but this suffers from problems such as large footprint (limited by space constraints in small stores), high cost (purchase and maintenance of multiple units), and poor temperature control coordination (independent operation of temperature zones leads to high energy consumption and unstable temperatures). Furthermore, commercial refrigerators need to withstand frequent door opening and closing operations, support a wider temperature range (-18℃ to 10℃), and rapid cooling under high loads, while also requiring greater durability and ease of maintenance, which existing household technologies cannot adequately meet. Summary of the Invention

[0004] To address the issues of large temperature differences and inability to achieve precise temperature control in multiple temperature zones in traditional commercial refrigerators, this application provides a commercial refrigerator with multi-temperature zone temperature control.

[0005] The multi-temperature zone temperature-controlled commercial refrigerator provided in this application adopts the following technical solution: A multi-temperature zone temperature-controlled commercial refrigerator includes a refrigerator cabinet and a refrigeration mechanism fixedly installed at the upper part of the refrigerator cabinet for refrigeration. The refrigerator cabinet has multiple independent compartments arranged inside, and each compartment has an air duct cover for discharging cold air and a temperature sensor for detecting temperature fixedly installed on its inner wall. The refrigeration mechanism includes a cold air duct inside the refrigerator cabinet. Multiple cold air diversion pipes are fixedly installed through the middle of the cold air duct. An electric damper is fixedly installed inside the air duct cover at the end of the cold air diversion pipe away from the cold air duct. Each electric damper is adapted to a controller and a temperature sensor. The controller controls the angle of the electric damper to adjust the cold air flow of the cold air diversion pipe, so that the temperature of the compartment can be independently adjusted.

[0006] By adopting the above technical solution, cold air is delivered to the air duct cover of the room through cold air pipes and cold air distribution pipes, realizing independent temperature control of multiple temperature zones. At the same time, temperature sensors monitor the room temperature in real time to accurately adjust the cooling capacity.

[0007] Preferably, the refrigeration mechanism includes a variable frequency compressor, a condenser, and an evaporator. A sealed box is movably fitted on the outside of the condenser, and a sealing plate is fixed inside the upper end of the refrigerator cabinet between the condenser and the evaporator to isolate the evaporator from the condenser.

[0008] By adopting the above technical solution, the sealing box is movably sleeved on the outside of the condenser to reduce its heat loss and reduce operating noise, while the sealing plate prevents the residual heat of the condenser from interfering with the evaporator's refrigeration efficiency through physical isolation.

[0009] Preferably, the end of the cold air distribution pipe away from the cold air duct is connected to the interior of the air duct cover.

[0010] By adopting the above technical solution, the cold air distribution pipe accurately delivers the cold air in the cold air duct to the inside of the air duct cover of the room to achieve uniform cooling.

[0011] Preferably, the outlet of the variable frequency compressor is fixedly connected to a high-pressure exhaust pipe that is fixedly connected to the inlet of the condenser; the outlet of the condenser is fixedly connected to a high-pressure liquid pipe that is fixedly connected to the inlet of the expansion valve; the outlet of the expansion valve is fixedly connected to a low-pressure liquid pipe that is fixedly connected to the inlet of the evaporator; and the outlet of the evaporator is fixedly connected to a low-pressure suction pipe that is fixedly connected to the inlet of the variable frequency compressor.

[0012] By adopting the above technical solution, the high-pressure exhaust pipe, high-pressure liquid pipe, low-pressure liquid pipe and low-pressure suction pipe are connected in sequence to the variable frequency compressor, condenser, expansion valve and evaporator to form a closed refrigerant circulation loop, realize the gas-liquid phase change and pressure conversion of the refrigerant, and thus complete the refrigeration function of the refrigerator.

[0013] Preferably, the plurality of compartments are configured as compartment one, compartment two, compartment three, compartment four, compartment five, and compartment six, and each of the plurality of compartments is movably equipped with a plurality of partitions.

[0014] By adopting the above technical solutions, the independent temperature control devices of each compartment of the refrigerator can adjust the temperature to suit the optimal preservation needs of different foods, and the placement of shelves can flexibly divide or adjust the storage space to meet the storage needs of items of different sizes.

[0015] Preferably, the inner wall of the fifth compartment is fixedly provided with an adjustment mechanism for adjusting the height of the partition.

[0016] By adopting the above technical solution, the adjustment mechanism is used to flexibly adjust the height of the partition to adapt to the storage needs of different items.

[0017] Preferably, the adjustment mechanism includes an adjustment plate and a fixed block slidably disposed on one side of the adjustment plate. An adjustment hole is provided on one side of the adjustment plate, and a lock cylinder is fixedly disposed through the side of the fixed block away from the adjustment plate.

[0018] By adopting the above technical solution, the adjustment mechanism slides on the adjustment plate through the fixed block and locks itself by cooperating with the adjustment hole using the lock cylinder, thereby realizing flexible adjustment and fixation of the height of the partition and meeting the storage needs of items of different sizes.

[0019] Preferably, a locking seat fixed to the surface of the adjusting plate is movably sleeved in the middle of the lock cylinder, and a spring is provided inside the locking seat, with the two ends of the spring fixed to the outer wall of the middle of the lock cylinder and the inner wall of the locking seat, respectively.

[0020] By adopting the above technical solution, the locking seat drives the lock cylinder to automatically reset and engage with the adjustment hole through the elastic force of the internal spring, thereby achieving stable locking and unlocking of the adjustment plate and the fixed block.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. This device starts the inverter compressor, which drives the high-temperature, high-pressure gaseous refrigerant through the high-pressure exhaust pipe into the condenser, where it is condensed into a high-pressure liquid. After being throttled and depressurized by the expansion valve, the liquid enters the evaporator, absorbs heat, and evaporates into a gaseous state. The gas is then returned to the compressor through the low-pressure suction pipe to complete the cycle. This allows the cold air generated by the evaporator to be evenly delivered to the compartments through the cold air pipes and cold air distribution pipes. This refrigeration cycle, combined with the adjustable opening angle of the electric damper (0°~90°), achieves precise constant temperature control of ±0.3°C in each compartment and a wide temperature range setting of 10°C~-24°C. This solves the problems of traditional dual-temperature zone refrigerators, such as single temperature zone and large temperature fluctuations (caused by frequent door opening and closing), and meets the differentiated storage needs of ingredients in coffee shops, such as ice cubes (compartment 2) -18°C, iced coffee (compartment 4) 4°C, smoothies (compartment 1) -5°C, and ice cream (compartment 2) -15°C.

[0022] 2. By rotating the lock cylinder, the lock cylinder protrusion slides along the irregular groove of the locking seat, compressing the compression spring. This causes the end of the lock cylinder to completely disengage from the circular hole array of the adjustment hole, which in turn causes the fixing block to slide along the adjustment groove of the adjustment plate, adjusting the placement of the partition to a suitable position. After rotating the lock cylinder in the opposite direction, the spring returns to its original position, pushing the lock cylinder back into the corresponding hole of the adjustment hole. The fixing block and the adjustment plate are locked, thus fixing the position of the partition. This meets the flexible storage needs of items of different sizes (such as beverage ingredients and fruit drinks). After reasonably adjusting the position of the partition, the obstruction of the air vents of the air duct by the items can be reduced, allowing the cold air to be evenly distributed to all areas of the compartment. At the same time, it avoids the items being stacked too high and blocking the temperature sensor, allowing the temperature sensor to more accurately sense the actual temperature of the compartment. Attached Figure Description

[0023] Figure 1 This is an isometric view of the overall structure of this application; Figure 2 This is a partial isometric view of the structure of this application; Figure 3 This is a schematic diagram of the right-side axis of part of the structure of this application; Figure 4 This is a schematic diagram of the internal structure of the drying oven in this application; Figure 5 This is a sectional view of the rear portion of this application; Figure 6 This is a schematic diagram of the regulating mechanism structure of this application; Figure 7 This is a partial exploded view of the regulating mechanism of this application; Figure 8 This is an exploded view of the regulating mechanism in this application from below; Figure 9 This is a cross-sectional view of the lock cylinder structure in this application; Figure 10 This is a diagram of the internal structure of the refrigerator cabinet in this application; Figure 11 This is a rear view of the internal structure of the refrigerator cabinet in this application; Figure 12 This is a front sectional view of the refrigerator cabinet in this application.

[0024] Attached reference numerals: 1. Refrigerator cabinet; 2. Refrigeration mechanism; 3. Adjustment mechanism; 4. Compartment 1; 5. Compartment 2; 6. Compartment 3; 7. Compartment 4; 8. Compartment 5; 9. Compartment 6; 10. Temperature sensor; 11. Air duct cover; 12. Controller; 13. Sealing plate; 14. Placement partition; 15. Placement box; 16. Cabinet door; 17. Air outlet; 18. Return air pipe; 19. Return air hole one; 20. Return air hole two; 21. Sealing box; 201. Variable frequency compressor; 202. Condenser; 203. Evaporator; 204. Electric damper; 205. Cold air duct; 206. Cold air distribution pipe; 207. Low-pressure liquid pipe; 208. Low-pressure suction pipe; 209. High-pressure exhaust pipe; 210. Expansion valve; 211. High-pressure liquid pipe; 212. Drain pipe; 301. Adjusting plate; 302. Fixing block; 303. Lock cylinder; 304. Adjusting groove; 305. Slide groove; 306. Locking seat; 307. Spring; 308. Adjusting hole; 309. Circular hole. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 - Figure 12 This application will be described in further detail.

[0026] This application discloses a commercial refrigerator with multi-zone temperature control.

[0027] Reference Figure 1 - Figure 4 The commercial refrigerator of this application belongs to the category of freezers; refrigerator compartments; refrigerators. A multi-temperature zone temperature-controlled commercial refrigerator includes a refrigerator cabinet 1 and a refrigeration mechanism 2 fixed to the upper part of the refrigerator cabinet 1. The middle part of the refrigerator cabinet 1 is provided with compartment 1 4, compartment 3 6 and compartment 5 8. The lower part of the refrigerator cabinet 1 is provided with compartment 2 5, compartment 4 7 and compartment 6 9. Compartments 1 4, compartment 3 6, compartment 5 8, compartment 2 5, compartment 4 7 and compartment 6 9 together form a multi-temperature zone, realizing wide temperature zone control from refrigeration to freezing. The temperature of each compartment can be independently set within the range of 10℃ to -24℃. Each compartment inner wall is fixed with an air duct cover 11, which is located on the rear side wall of the compartment. Each compartment inner wall is fixed with multiple placement partitions 14.

[0028] Multiple air vents are formed on the surface of the air duct cover 11 to exhaust cold air into each compartment. A temperature sensor 10 is fixedly installed in the middle of the inner wall of each compartment. (The temperature sensor 10 uses the QMI8610 manufactured by Shanghai Silicon Precision Technology Co., Ltd., which features high precision, low power consumption, and a response time of 0.5 seconds, suitable for temperature control systems in commercial refrigerators.) The temperature sensor 10 of each compartment senses the temperature and transmits it to the controller 12 via wires. The controller 12 processes the data and then transmits it to the electric damper 204 via wires. Based on the feedback temperature information, the operating state of the refrigeration system is adjusted in real time to maintain the temperature of each compartment within a set range (e.g., ±0.3℃ accuracy within the range of 10℃-24℃). The temperature sensor 10 is attached to the middle area of ​​the rear inner wall of the compartment (30mm from the outlet of the air duct cover 11), avoiding the direct path of the cold air, and collects temperature data in real time and transmits it through I... 2The C-bus (integrated circuit bus) transmits data to controller 12, which is configured as a central computer.

[0029] Before using the device, the refrigeration mechanism 2 needs to be fixed to the upper part of the refrigerator cabinet 1. Then, compartments 1-4, 3-6, and 5-8 are set in sequence in the middle of the refrigerator cabinet 1, and compartments 2-5, 4-7, and 6-9 are set at the lower end to form a multi-temperature zone structure. The adjustment mechanism 3 is installed in compartment 5-8, and the air duct cover 11 with air vents and temperature sensor 10 are fixed to the inner wall of each compartment. The controller 12 is fixed to the front top of the refrigerator cabinet 1, on the same side as the operating side of the cabinet door 16 of the compartment. The placement box 15 is installed in compartments 2-5, 4-7, and 6-9. The cabinet door 16 is then hinged to complete the installation.

[0030] Adjustment mechanisms 3 are fixedly installed on the inner wall of compartment 5 8 near compartment 3 6 and on the side adjacent to compartment 3 6. The adjustment mechanisms 3 are used to freely adjust the moving position of each placement partition 14. Each compartment is hinged to the outside of a cabinet door 16 for sealing the compartment and facilitating storage. A sealing cover is provided on the upper side of the refrigerator cabinet 1. A controller 12 is fixedly installed on the side of the sealing cover (the controller 12 can be a 32-bit ARM Cortex-M4 core (120MHz main frequency, built-in FPU), equipped with a fuzzy PID composite control algorithm (sampling period 50ms, output update period 200ms), and combined with the speed of the variable frequency compressor 201 and the opening angle (0°~90°) of the electric damper 204 for multi-variable collaborative control). Placement boxes 15 are movably installed at the lower inside of compartments 2 5, 4 7 and 6 9 for storing large amounts of fruits or beverages.

[0031] By activating the refrigeration mechanism 2 (which uses a single variable frequency compressor 201 to achieve single-system refrigeration, automatically adjusting the refrigeration capacity distribution output based on the refrigeration demand of each compartment to avoid the impact of frequent start-stop of the fixed frequency compressor on the temperature zone), cold air is generated (with fixed frequency and variable frequency starting and stopping, there is a 3-5 degree difference between the cold room and the temperature; with variable frequency, the cold air loss after opening and closing the door is intelligently increased to increase the refrigeration capacity), and the cold air is evenly discharged into each compartment through the air outlet of the air duct cover 11, thereby cooling the interior of the compartment; the temperature sensor 10 detects the temperature of each compartment in real time and feeds it back to the controller 12, so that the controller 12 adjusts the refrigeration capacity of the refrigeration mechanism 2 to maintain the set temperature zone, achieving constant temperature control within the range of ±0.3℃ of the set temperature of the compartment; the position of the placement partition 14 in the compartment 8 is adjusted by the adjustment mechanism 3, so that items of different sizes can be stored appropriately.

[0032] Reference Figure 2 - Figure 3 , Figure 5 , Figure 10 - Figure 12The refrigeration unit 2 includes a variable frequency compressor 201, a condenser 202, an evaporator 203, and a cold air duct 205 laid vertically on the rear side wall inside the refrigerator cabinet 1. Multiple cold air diversion pipes 206 are fixedly installed at equal intervals along the length of the cold air duct 205. An electric damper 204 is fixedly installed at the end of the cold air diversion pipe 206 away from the cold air duct 205. The variable frequency compressor 201 is located at the upper rear end of the refrigerator cabinet 1. The variable frequency compressor 201 can adjust its speed according to the temperature control requirements of each compartment, thereby optimizing the cold air output, reducing energy waste caused by frequent start-stop, and impacting the high peak power of the national power grid during startup.

[0033] The electric damper 204 is located at the air inlet inside the air duct cover 11. The electric damper 204 is an independent damper driven by a stepper motor. The opening angle is adjusted according to the offset detected by the temperature sensor 10. The larger the offset (the temperature is higher than the set value), the larger the opening angle of the damper, and the air intake increases accordingly, ensuring that the compartment temperature is stable within the set value ±0.3℃ range. The evaporator 203 is movably installed on the side of the condenser 202 away from the variable frequency compressor 201. The condenser 202 and the evaporator 203 are located on both sides of the sealing plate 13. The outer side of the condenser 202 is movably fitted with a sealing box 21. The sealing box 21 is wrapped with a polyurethane foam layer. An air inlet is provided on one side of the sealing box 21, and an exhaust port that communicates with the refrigerator cabinet 1 is opened on the rear side of the sealing box 21.

[0034] A sealing plate 13 is fixedly installed inside the upper part of the refrigerator cabinet 1, between the condenser 202 and the evaporator 203. The sealing plate 13 adopts a composite structure: the main body is a 304 stainless steel plate, used to isolate refrigerant gas leakage; a polyurethane foam layer is filled between the stainless steel plate and the inner wall of the refrigerator cabinet 1, formed by high-pressure injection. The foam layer is tightly bonded to the stainless steel plate and the inner wall of the cabinet, forming a double-layer isolation structure—the stainless steel layer prevents gas penetration, and the foam layer blocks heat conduction, ensuring complete gas isolation between the evaporator 203 and the condenser 202, while reducing the loss of cold / heat energy, and achieving the function of temperature isolation. A conical air outlet 17 is provided on the inner wall of the rear side of the evaporator 203 at the upper end of the refrigerator cabinet 1. The air outlet 17 is connected to the top of the cold air pipe 205 and is used to guide the cold air into the cold air pipe 205. A drain hole is provided on the inner bottom surface of the refrigerator cabinet 1 at the bottom of the evaporator 203. A drain pipe 212 is laid inside the side wall of the refrigerator cabinet 1. A return air hole 20 is provided on the front side of the upper end of the refrigerator cabinet 1 below the evaporator 203. Return air holes 19 are provided on the side walls adjacent to the first compartment 4 and the third compartment 6, the second compartment 5 and the fourth compartment 7, and the side walls of the fifth compartment 8 and the sixth compartment 9 that are close to the third compartment 6 and the fourth compartment 7, respectively.

[0035] The height of the vent holes 19 on the side walls of compartments 6 and 7 is greater than the height of the vent holes 19 on the side walls of compartments 4 and 5. A vent pipe 18 is installed inside the refrigerator cabinet 1. The top of the vent pipe 18 extends above the inner bottom surface of the upper part of the refrigerator cabinet 1 to prevent condensate from entering the vent pipe 18. The top of the vent pipe 18 is connected to the vent hole 20, and the middle part of the vent pipe 18 is connected to multiple vent holes 19. The distribution route of the vent pipe 18 is as follows: it converges from the vent holes 19 on the side walls of the compartments to the main vent pipe 18. The main vent pipe 18 is laid along the right side wall of the cabinet to the top vent hole 20, and finally connects to the fan inlet of the evaporator 203 (e.g., ...). Figure 12 As shown in the figure.

[0036] Airflow inside each compartment enters the return air pipe 18 through the return air hole 19, and then exits through the return air pipe 18 and the return air hole 20 to the upper end of the refrigerator cabinet 1, so that the airflow flows back to the front end of the fan of the evaporator 203; the top end of the drain pipe 212 is connected to the drain hole, and the bottom end of the drain pipe 212 extends to the outer side of the bottom of the refrigerator cabinet 1. The drain pipe 212 is equipped with a spiral guide groove to prevent condensate from flowing back due to the tilt of the refrigerator. One end of the upper part of the refrigerator cabinet 1 is equipped with an air inlet 2, which is connected to the air inlet 1. A removable filter is installed at the inlet of the air inlet 2. The filter is fixed to the outside of the air inlet 2 (perpendicular to the air intake direction) by a buckle structure, which is convenient for regular replacement.

[0037] In operation, the variable frequency compressor 201 is started. The compressor automatically adjusts its speed according to the cooling needs of each compartment, causing the high-pressure exhaust pipe 209 to deliver high-temperature, high-pressure gaseous refrigerant to the condenser 202. The condenser 202 then condenses the gaseous refrigerant into a high-pressure liquid state. This liquid refrigerant is then delivered to the expansion valve 210 via the high-pressure liquid pipe 211. The expansion valve 210 throttles and reduces the pressure of the liquid refrigerant, allowing the low-pressure liquid refrigerant to enter the evaporator 203 through the low-pressure liquid pipe 207, absorbing heat and evaporating into a gaseous state. The suction pipe 208 returns the evaporated gaseous refrigerant to the variable frequency compressor 201 to complete the refrigeration cycle. At the same time, the cold air generated by the evaporator 203 is delivered to the air duct cover 11 of each compartment through the cold air pipe 205 and the cold air distribution pipe 206. The electric damper 204 is activated, and the cold air flow is adjusted according to the temperature of each compartment fed back by the temperature sensor 10. The controller 12 calculates the opening angle of the electric damper 204, so that the opening and closing of the electric damper 204 is adjusted according to the temperature deviation, thereby enabling each compartment to achieve precise constant temperature control of ±0.3℃.

[0038] A cold air duct 205 is installed on one side of the refrigerator cabinet 1 (e.g., Figure 5 As shown), multiple air distribution pipes 206 are fixedly installed on the surface of the air duct 205, and the flow rate of each air distribution pipe 206 is 3m³. 3 / h (per room), the end of the cold air distribution pipe 206 is equipped with an airflow regulating device with an electric valve, so that the flow rate of each pipe can be adjusted in real time according to the sensor feedback signal to ensure that the temperature of each room can be maintained within the set range. The end of the cold air distribution pipe 206 away from the cold air pipe 205 is connected to the inside of the air duct cover 11. The electric damper 204 is driven by a stepper motor and the opening angle is adjustable from 0° to 90°. The electric damper 204 is fixed inside the air duct cover 11. The outlet of the variable frequency compressor 201 is fixedly connected to a high-pressure exhaust pipe 209. The high-pressure exhaust pipe 209 is away from the variable frequency compressor. One end of compressor 201 is fixedly connected to the inlet of condenser 202. A high-pressure liquid pipe 211 is fixedly connected to the outlet of condenser 202. The end of high-pressure liquid pipe 211 away from condenser 202 is fixedly connected to the inlet of expansion valve 210. A low-pressure liquid pipe 207 is fixedly connected to the outlet of expansion valve 210. The end of low-pressure liquid pipe 207 away from expansion valve 210 is fixedly connected to the inlet of evaporator 203. A low-pressure suction pipe 208 is fixedly connected to the outlet of evaporator 203. The end of low-pressure suction pipe 208 away from evaporator 203 is fixedly connected to the inlet of variable frequency compressor 201.

[0039] The variable frequency compressor 201 automatically adjusts its speed according to the cooling needs of each room, avoiding frequent start-stop cycles and matching the cooling capacity output with the load of each room, thereby reducing energy consumption and noise. The electric damper 204 of each room adjusts its opening angle from 0° to 90° according to the temperature deviation, so that the air intake changes with the temperature demand, thereby enabling each room to achieve a wide temperature range of 10°C to 24°C and constant temperature control of ±0.3°C. The sealed box 21 and the sealing plate 13 isolate the condenser 202 and evaporator 203 from gas leakage.

[0040] Reference Figure 6 - Figure 9 The adjustment mechanism 3 includes an adjustment plate 301 and a fixing block 302 slidably disposed on one side of the adjustment plate 301. The bottom ends of the fixing blocks 302 are fixed to the top end of the partition plate 14. An adjustment groove 304 is provided in the middle of the adjustment plate 301, and an adjustment hole 308 is provided on one side of the adjustment plate 301. The adjustment hole 308 is composed of an array of multiple interconnected, vertically arranged circular holes. The shape of the adjustment hole 308 (e.g., Figure 7 As shown), the adjusting hole 308 and the adjusting groove 304 are interconnected, and the shape of the fixing block 302 is as follows (e.g., Figure 7 As shown), the bottom end of the fixing block 302 is fixed to one side of the top of the partition plate 14. A groove 305 is provided on the side of the fixing block 302 near the adjusting plate 301. The inner wall shape of the groove 305 matches the shape of the adjusting groove 304. The fixing block 302 slides on the adjusting plate 301. A circular hole 309 is provided on the side of the fixing block 302 away from the adjusting plate 301. A lock cylinder 303 is movably inserted through the circular hole 309. The cross-sectional shape of the lock cylinder 303 (as shown) Figure 10 (As shown).

[0041] In use, press the head of the lock cylinder 303 with your thumb and rotate it. The boss of the lock cylinder 303 slides along the irregular groove of the locking seat 306, compressing the spring 307 and causing the end of the lock cylinder 303 to completely disengage from the adjustment hole 308. At this time, slide the fixing block 302 along the adjustment groove 304 of the adjustment plate 301 to adjust the position of the partition 14. After the partition 14 is moved to the appropriate position, rotate the lock cylinder 303 in the opposite direction. At this time, the spring 307 resets and pushes the lock cylinder 303 to re-engage into the corresponding hole of the adjustment hole 308, thereby locking the fixing block 302 with the adjustment plate 301 and fixing the position of the partition 14.

[0042] A locking seat 306 is movably fitted in the middle of the lock cylinder 303. The concave surface of the locking seat 306 on the side away from the adjusting plate 301 is fixed to the surface of the adjusting plate 301. A spring 307 is provided inside the locking seat 306. The two ends of the spring 307 are fixed to the outer wall of the middle part of the lock cylinder 303 and the inner wall of the locking seat 306, respectively. A special-shaped groove is opened inside the locking seat 306. The shape of the special-shaped groove is adapted to the shape of the middle part of the lock cylinder 303. A protrusion is provided in the middle part of the lock cylinder 303. When the lock cylinder 303 is rotated, the protrusion slides along the groove wall and compresses the spring 307, so that the end of the lock cylinder 303 is released from the restriction of the circular hole array of the adjusting hole 308.

[0043] Because the sliding groove 305 on the side of the fixing block 302 is adapted to the shape of the adjusting groove 304 of the adjusting plate 301, the fixing block 302 maintains a stable trajectory when sliding; by unlocking the fixing block 302 at the top of the partition 14 and the adjusting plate 301, the height of the partition 14 is adjusted by the cooperation between the fixing block 302 and the adjusting plate 301.

[0044] When the room temperature deviates from the set value (deviation range ±0.3℃), the controller 12 adjusts the speed of the variable frequency compressor 201 to change the system's cooling capacity output; and simultaneously adjusts the opening and closing angle of the electric damper 204 (0°~90°) to accurately match the cooling demand.

[0045] The implementation principle of a multi-temperature zone temperature-controlled commercial refrigerator according to an embodiment of this application is as follows: After the device is started, the variable frequency compressor 201 of the refrigeration mechanism 2 sends the high-temperature and high-pressure gaseous refrigerant to the condenser 202 through the high-pressure exhaust pipe 209 to condense it into a high-pressure liquid state. The liquid refrigerant then passes through the high-pressure liquid pipe 211 to the expansion valve 210 for throttling and pressure reduction. The low-pressure liquid refrigerant then enters the evaporator 203 through the low-pressure liquid pipe 207 to absorb heat and evaporate into a gaseous state. The gaseous state is then returned to the compressor through the low-pressure suction pipe 208 to complete the cycle. The cold air generated by the evaporator 203 is transported through the cold air pipe 205 and the cold air distribution pipe 206. The air is delivered to the air duct cover 11 in the compartment. The electric damper 204 adjusts the opening angle from 0° to 90° according to the feedback from the temperature sensor 10 and the calculation of the controller 12, so that the cold air is evenly discharged into the compartment, achieving precise constant temperature of ±0.3℃ and wide temperature range control of 10℃ to 24℃. The adjustment mechanism 3 compresses the spring 307 by rotating the lock core 303 and disengages it from the adjustment hole 308. The sliding fixed block 302 adjusts the position of the partition 14 along the adjustment groove 304 of the adjustment plate 301. The variable frequency compressor 201 automatically adjusts the speed to reduce energy consumption and noise, and the sealed box 21 and the sealing plate 13 prevent gas leakage.

[0046] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A commercial refrigerator with multi-temperature zone control, characterized in that: The refrigerator includes a refrigerator cabinet (1) and a refrigeration mechanism (2) for refrigeration fixed at the upper part of the refrigerator cabinet (1). The refrigerator cabinet (1) has multiple independent compartments inside, and each compartment has an air duct cover (11) for venting cold air and a temperature sensor (10) for detecting temperature fixed on its inner wall. The refrigeration mechanism (2) includes a cold air duct (205) inside the refrigerator cabinet (1). Multiple cold air diversion pipes (206) are fixedly installed in the middle of the cold air duct (205). An electric damper (204) is fixedly installed inside the air duct cover (11) at the end of the cold air diversion pipe (206) away from the cold air duct (205). Each electric damper (204) is adapted to the controller (12) and the temperature sensor (10). The controller (12) controls the angle of the electric damper (204) to adjust the airflow of the cold air distribution pipe (206), so that the temperature of the room can be adjusted independently.

2. The multi-temperature zone temperature-controlled commercial refrigerator according to claim 1, characterized in that: The refrigeration mechanism (2) includes a variable frequency compressor (201), a condenser (202) and an evaporator (203). A sealing box (21) is movably fitted on the outside of the condenser (202). A sealing plate (13) is fixed inside the upper end of the refrigerator cabinet (1) between the condenser (202) and the evaporator (203) to isolate the evaporator (203) from the condenser (202).

3. A multi-temperature zone temperature-controlled commercial refrigerator according to claim 2, characterized in that: The end of the air distribution pipe (206) away from the air duct (205) is connected to the interior of the air duct cover (11).

4. A multi-temperature zone temperature-controlled commercial refrigerator according to claim 3, characterized in that: The outlet of the variable frequency compressor (201) is fixedly connected to the inlet of the condenser (202) via a high-pressure exhaust pipe (209). The outlet of the condenser (202) is fixedly connected to the inlet of the expansion valve (210) via a high-pressure liquid pipe (211). The outlet of the expansion valve (210) is fixedly connected to the inlet of the evaporator (203) via a low-pressure liquid pipe (207). The outlet of the evaporator (203) is fixedly connected to the inlet of the variable frequency compressor (201) via a low-pressure suction pipe (208).

5. A multi-temperature zone temperature-controlled commercial refrigerator according to claim 4, characterized in that: The multiple rooms are configured as room one (4), room two (5), room three (6), room four (7), room five (8), and room six (9), and multiple partitions (14) are movably installed inside each of the multiple rooms.

6. A multi-temperature zone temperature-controlled commercial refrigerator according to claim 5, characterized in that: The inner wall of the fifth compartment (8) is fixed with an adjustment mechanism (3) for adjusting the height of the partition (14).

7. A multi-temperature zone temperature-controlled commercial refrigerator according to claim 6, characterized in that: The adjustment mechanism (3) includes an adjustment plate (301) and a fixed block (302) slidably disposed on one side of the adjustment plate (301). An adjustment hole (308) is provided on one side of the adjustment plate (301), and a lock cylinder (303) is fixedly disposed on the side of the fixed block (302) away from the adjustment plate (301).

8. A multi-temperature zone temperature-controlled commercial refrigerator according to claim 7, characterized in that: The lock cylinder (303) is movably fitted with a locking seat (306) fixed to the surface of the adjusting plate (301). The locking seat (306) is provided with a spring (307) inside. The two ends of the spring (307) are fixed to the outer wall of the middle part of the lock cylinder (303) and the inner wall of the locking seat (306), respectively.

Images