A compact double-system refrigerating unit for a refrigerated vehicle

Abstract

The application discloses a compact double-system refrigerating unit for a refrigerated truck and belongs to the technical field of refrigerated transport refrigeration equipment, which comprises a No.1 refrigerating machine, the lower end of the No.1 refrigerating machine is assembled with a No.2 refrigerating machine, the two sides of the No.1 refrigerating machine and the No.2 refrigerating machine are provided with connecting assemblies, the upper end of the No.2 refrigerating machine is provided with an anti-collision assembly, and the inside of the No.1 refrigerating machine and the No.2 refrigerating machine is provided with a vibrating assembly. The connecting assemblies are arranged, two refrigerating machines are gaplessly attached and stacked, the vertical space occupied by the whole machine is reduced, the refrigerated truck compartment is small, the problem that the assembly gap of the traditional independent support is large is avoided, the sponge soft pad in the supporting plate can realize bottom buffering, the anti-collision assembly is arranged, the spring pushes the clamping block to lock and hold the rubber block between the two sets of machines, the shell impact is buffered when the vehicle bounces, and the direct collision of metal is avoided to cause the deformation of the shell.

Description

Technical Field

[0001] This invention belongs to the technical field of refrigeration equipment for refrigerated transport, and specifically relates to a compact dual-system refrigeration unit for refrigerated trucks. Background Technology

[0002] Refrigerated transport vehicles are widely used for long-distance transport of temperature-controlled goods such as fresh fruits and vegetables, cold chain pharmaceuticals, and frozen foods. They rely on onboard refrigeration units to maintain a stable low-temperature environment inside the cargo compartment, preventing the goods from spoiling due to temperature fluctuations. As the scale of cold chain transportation continues to expand, a single refrigeration unit is sometimes insufficient to meet the refrigeration load requirements of large-capacity cargo compartments or low-temperature conditions. Therefore, more and more refrigerated vehicles are adopting a dual-refrigeration unit combination working mode. The dual refrigeration units can choose from multiple working modes such as independent start-stop and coordinated operation to adapt to different transportation conditions.

[0003] However, most existing stacked dual refrigeration units rely on independent brackets to fix the two units separately. The brackets occupy a large vertical space, making it difficult to achieve compact assembly. There is a lack of reliable limiting structure between the two units. During vehicle travel, the unit casings are prone to collisions, causing deformation and damage to the outer shell. At the same time, after the refrigeration units have been working for a long time, the ventilation holes of the casing are prone to ice buildup and blockage. Conventional defrosting methods are energy-intensive and lack mechanical structures that can remove the ice layer from the ventilation holes in a timely manner. When the ice layer blocks the ventilation channels, it will directly reduce the heat exchange efficiency of the unit and affect the cooling effect. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a compact dual-system refrigeration unit for refrigerated trucks, characterized by two refrigeration units that can be interconnected, an anti-collision rubber block between the two refrigeration units, and a de-icing vibrating rod inside the refrigerant.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a compact dual-system refrigeration unit for refrigerated trucks, comprising a first refrigeration unit, a second refrigeration unit mounted at the lower end of the first refrigeration unit, connecting components on both sides of the first and second refrigeration units, an anti-collision component at the upper end of the second refrigeration unit, and a vibration component inside the first and second refrigeration units.

[0006] Preferably, the connecting assembly includes a support plate, a mounting plate, a plug rod, a connecting plate, a rotating plate, a first hinge seat, a movable plate, a fixed plate, a sliding sleeve, a double-acting screw, and a mounting block. Mounting blocks are fixedly connected to both sides of the first and second refrigeration units. The mounting blocks are slidably fitted inside the mounting plate. A support plate is fixedly connected to the lower end of the mounting plate. A fixed plate is symmetrically arranged on one side of the mounting plate. A double-acting screw is rotatably connected inside the fixed plate. A sliding sleeve is symmetrically threaded onto the surface of the double-acting screw. A movable plate is fixedly connected to one side of the sliding sleeve. A first hinge seat is fixedly connected to one side of the movable plate. A rotating plate is hinged to the surface of the first hinge seat. A connecting plate is hinged to one end of the rotating plate. Plug rods are symmetrically arranged vertically on one side of the connecting plate. The plug rods pass through the mounting plate and are inserted into the mounting blocks.

[0007] Preferably, the upper end of the tray is provided with a placement groove, and a sponge pad is fixedly connected to the placement groove.

[0008] Preferably, the lower end of the bidirectional lead screw is fixedly connected to a turntable, and the surface of the turntable is uniformly provided with protrusions.

[0009] Preferably, one end of the movable plate is fixedly connected to a guide plate, the guide plate has a guide rod that slides inside it, and both ends of the guide rod are fixedly connected to side plates, which are fixedly connected to the mounting plate.

[0010] Preferably, the anti-collision assembly includes a fixed arc-shaped plate, a second hinge seat, an arc-shaped baffle, a horizontal plate, a fixed rod, a spring, a limiting plate, a locking block, a locking plate, and a rubber block. The upper end of the second refrigeration unit is fixedly connected to a locking plate, and fixed arc-shaped plates are symmetrically fixedly connected to both ends of the locking plate. A second hinge seat is fixedly connected to one end of the fixed arc-shaped plate, and an arc-shaped baffle is hinged to the surface of the second hinge seat. A horizontal plate is fixedly connected to one end of the arc-shaped baffle, and limiting plates are symmetrically arranged on one side of the horizontal plate. A fixed rod is fixedly connected between the two limiting plates, and a locking block is slidably connected to the surface of the fixed rod. One end of the locking block is locked inside the locking plate. A spring is sleeved on one side of the surface of the fixed rod, with one end of the spring abutting against the limiting plate and the other end abutting against the locking block. A rubber block is assembled between the fixed arc-shaped plate and the arc-shaped baffle, and the upper end of the rubber block contacts the first refrigeration unit.

[0011] Preferably, a positioning block is fixedly connected to the lower end of the rubber block, and a positioning rod is inserted into the inside of the positioning block. One end of the positioning rod is fixedly connected to the inner arc side of the fixed arc plate.

[0012] Preferably, the vibrating assembly includes a base plate, a motor, a rotating rod, a movable rod, a fixed column, a movable frame, a vertical plate, and a vibrating rod. The base plate is fixedly connected to the bottom of both the first and second refrigeration units. A motor is fixedly connected to the upper end of the base plate. A rotating rod is fixedly connected to the output end of the motor. A movable rod is fixedly connected to one end of the rotating rod. A fixed column is fixedly connected to the upper end of the movable rod. A movable frame is slidably fitted onto the surface of the fixed column. A vibrating rod is fixedly connected to one side of the movable frame. The vibrating rod is slidably connected to the interior of the vertical plate. The vertical plate is fixedly connected to one side of the upper end of the base plate.

[0013] Preferably, the vibrating rod is provided with limit strips symmetrically on both sides, the limit strips are slidably connected to the inside of the vertical plate, one end of the vibrating rod is fixedly connected to a spherical rubber head, and the surface of the motor is fixedly connected to a moisture-proof protective shell.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves seamless stacking of two refrigeration units by setting up a connecting component and using a two-way lead screw and a scissor-type hinged connecting rod. This helps to reduce the vertical space occupied by the whole unit, adapt to the narrow installation space of refrigerated truck compartments, and avoid the problems of large assembly gaps and excessive space occupation of traditional independent brackets. The sponge pad inside the tray can realize bottom cushioning, and the guide plate and guide rod limiting structure prevent the mechanism from shifting and loosening.

[0015] 2. By setting up an anti-collision component, the rubber block is placed between two units by a spring-loaded self-locking clamping block. This helps to buffer the impact of the housing when the vehicle is bumpy and avoids the deformation of the housing caused by direct metal collision. The spring-loaded quick-release structure makes it easy to replace worn rubber parts individually and avoids the cumbersome process of disassembling and maintaining the whole machine.

[0016] 3. By setting up a vibration assembly, the vibrating rod is driven by the motor crank connecting rod to reciprocate and vibrate the housing, which helps to automatically remove ice accumulation in the ventilation holes and maintain smooth cold air flow. This avoids the defects of high energy consumption and delayed de-icing of traditional hot air defrosting. The vibrating rod end is equipped with a spherical rubber head, which helps to reduce impact rigidity and avoid cracking of the refrigerant weld joint caused by long-term vibration. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the connection component of the present invention; Figure 4 This is a partially enlarged schematic diagram of the connection component of the present invention; Figure 5 This is a schematic diagram of the anti-collision component of the present invention; Figure 6 This is a schematic diagram of the vibratory tamping assembly of the present invention.

[0018] In the diagram: 100, Refrigeration Unit No. 1; 110, Refrigeration Unit No. 2; 200, Connecting Assembly; 210, Support Plate; 220, Mounting Plate; 230, Insert Rod; 240, Connecting Plate; 241, Rotating Plate; 242, Hinge Seat No. 1; 250, Movable Plate; 260, Fixed Plate; 270, Sliding Sleeve; 280, Two-Way Screw; 290, Mounting Block; 300, Anti-Collision Assembly; 310, Fixed Arc Plate; 320, Hinge Seat No. 2; 330, Arc Baffle; 340, Horizontal Plate; 350, Fixed Rod; 351, Spring; 360, Limiting Plate; 370, locking block; 380, locking plate; 390, rubber block; 400, vibrating assembly; 410, base plate; 420, motor; 430, rotating rod; 440, movable rod; 450, fixed column; 460, movable frame; 470, vertical plate; 480, vibrating rod; 510, placement groove; 520, sponge pad; 530, protrusion; 540, turntable; 550, side plate; 560, guide rod; 570, guide plate; 610, positioning block; 620, positioning rod; 710, limiting strip; 720, moisture-proof protective shell; 730, spherical rubber head. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0020] Please see Figure 1-6 The present invention provides the following technical solution: a compact dual-system refrigeration unit for refrigerated trucks, including a first refrigeration unit 100, a second refrigeration unit 110 assembled at the lower end of the first refrigeration unit 100, connecting components 200 provided on both sides of the first refrigeration unit 100 and the second refrigeration unit 110, an anti-collision component 300 provided at the upper end of the second refrigeration unit 110, and a vibration component 400 provided inside the first refrigeration unit 100 and the second refrigeration unit 110.

[0021] Specifically, the connecting assembly 200 includes a support plate 210, a mounting plate 220, a plug rod 230, a connecting plate 240, a rotating plate 241, a first hinge seat 242, a movable plate 250, a fixed plate 260, a sliding sleeve 270, a double-acting screw 280, and mounting blocks 290. Mounting blocks 290 are fixedly connected to both sides of the first refrigeration unit 100 and the second refrigeration unit 110. The mounting blocks 290 are slidably fitted inside the mounting plate 220. The lower end of the mounting plate 220 is fixedly connected to the support plate 210, and fixed mounting blocks are symmetrically arranged on one side of the mounting plate 220. Plate 260, fixed plate 260 is rotatably connected to a two-way lead screw 280, the surface of the two-way lead screw 280 is symmetrically threaded with a sliding sleeve 270, a movable plate 250 is fixedly connected to one side of the sliding sleeve 270, a first hinge seat 242 is fixedly connected to one side of the movable plate 250, a rotating plate 241 is hinged to the surface of the first hinge seat 242, a connecting plate 240 is hinged to one end of the rotating plate 241, and a plug rod 230 is symmetrically arranged on one side of the connecting plate 240, the plug rod 230 passes through the mounting plate 220 and is inserted into the mounting block 290.

[0022] By adopting the above technical solution, when connecting the two refrigeration units, the first refrigeration unit 100 and the second refrigeration unit 110 are pushed from top to bottom to cause the mounting block 290 to slide and assemble into the mounting plate 220. At this time, the bidirectional lead screw 280 is rotated to drive the sliding sleeves 270 on both sides to move away from each other in a synchronized manner. The sliding sleeves 270 pull the movable plate 250, the rotating plate 241 and the connecting plate 240 to tighten inward in a synchronized manner. The connecting plate 240 drives the upper and lower two insertion rods 230 to be inserted into the mounting block 290 respectively, so that the insertion rods 230 lock the first refrigeration unit 100 and the second refrigeration unit 110, eliminating the assembly gap reserved between the two refrigeration units, so that the first refrigeration unit 100 and the second refrigeration unit 110 are tightly attached and stacked, greatly reducing the vertical space occupied by the whole machine and realizing compact assembly.

[0023] Specifically, the upper end of the tray 210 is provided with a mounting groove 510, and a sponge pad 520 is fixedly connected to the mounting groove 510.

[0024] By adopting the above technical solution, when installing two refrigeration units, the support plate 210 is used to support the bottom of the second refrigeration unit 110, and the sponge pad 520 in the mounting groove 510 plays a role in buffering and shock absorption. When the vehicle is bumpy, the rigid collision between the unit and the support plate 210 is reduced, the operating noise is reduced, and the bottom of the unit is protected and scratched.

[0025] Specifically, a turntable 540 is fixedly connected to the lower end of the bidirectional lead screw 280, and protrusions 530 are evenly distributed on the surface of the turntable 540.

[0026] By adopting the above technical solution, when rotating the bidirectional lead screw 280, the operator can hold the protrusion 530 on the surface of the turntable 540 to rotate the bidirectional lead screw 280. The protrusion 530 increases the friction of the hand, and the bidirectional lead screw 280 can be rotated and locked without additional tools, making it convenient to disassemble and assemble the two units.

[0027] Specifically, a guide plate 570 is fixedly connected to one end of the movable plate 250, a guide rod 560 is slidably fitted inside the guide plate 570, and side plates 550 are fixedly connected to both ends of the guide rod 560. The side plates 550 are fixedly connected to the mounting plate 220.

[0028] By adopting the above technical solution, when using the connecting component 200, the sliding sleeve 270 moves and drives the guide plate 570 to slide horizontally along the guide rod 560 to a limit position, preventing the movable plate 250 from shifting when it moves.

[0029] In this embodiment, during use: The first refrigeration unit 100 and the second refrigeration unit 110 are pushed downwards to cause the mounting block 290 to slide and assemble into the mounting plate 220. At this time, rotating the bidirectional lead screw 280 causes the sliding sleeves 270 on both sides to move away from each other simultaneously. This causes the sliding sleeves 270 to pull the movable plate 250, the rotating plate 241, and the connecting plate 240 inwards in sync. The connecting plate 240 then causes the upper and lower insertion rods 230 to be inserted into the mounting block 290, locking the first refrigeration unit 100 and the second refrigeration unit 110 in place. This eliminates the pre-reserved assembly gap between the two refrigeration units, allowing them to fit tightly together and stack, significantly reducing the vertical space occupied by the entire unit and achieving a compact assembly. When the unit is in cold operation, the support plate 210 supports the bottom of the second refrigeration unit 110. The sponge pad 520 in the mounting groove 510 acts as a buffer and shock absorber, reducing rigid collisions between the unit and the support plate 210 when the vehicle is bumpy, reducing operating noise, and also protecting the bottom of the unit from scratches. When rotating the double-acting screw 280, the operator can hold the protrusion 530 on the surface of the turntable 540 to rotate the double-acting screw 280. The protrusion 530 increases the friction of the hand, and the double-acting screw 280 can be rotated and locked without additional tools. The disassembly and assembly of the two units is convenient. When using the connecting component 200, the sliding sleeve 270 moves and drives the guide plate 570 to slide horizontally along the guide rod 560 to limit its movement, preventing the movable plate 250 from shifting when it moves.

[0030] Specifically, the anti-collision component 300 includes a fixed arc-shaped plate 310, a second hinge seat 320, an arc-shaped baffle 330, a horizontal plate 340, a fixing rod 350, a spring 351, a limiting plate 360, a locking block 370, a locking plate 380, and a rubber block 390. The upper end of the second refrigeration unit 110 is fixedly connected to the locking plate 380, and the two ends of the locking plate 380 are symmetrically fixedly connected to the fixed arc-shaped plate 310. One end of the fixed arc-shaped plate 310 is fixedly connected to the second hinge seat 320, and the surface of the second hinge seat 320 is hinged to the arc-shaped baffle 330. One end of the arc-shaped baffle 330 is fixedly connected to... A horizontal plate 340 is attached, and a limit plate 360 ​​is symmetrically arranged on one side of the horizontal plate 340. A fixing rod 350 is fixedly connected between the two limit plates 360. A locking block 370 is slidably connected to the surface of the fixing rod 350. One end of the locking block 370 is locked inside the locking plate 380. A spring 351 is sleeved on one side of the surface of the fixing rod 350. One end of the spring 351 abuts against the limit plate 360, and the other end of the spring 351 abuts against the locking block 370. A rubber block 390 is assembled between the fixed arc plate 310 and the arc baffle 330. The upper end of the rubber block 390 is in contact with the first refrigeration unit 100.

[0031] By adopting the above technical solution, when disassembling and assembling the rubber block 390, under normal conditions, the spring 351 continuously applies a pushing force to the locking block 370, so that the locking block 370 is always locked inside the locking plate 380, locking the arc-shaped baffle 330, and limiting and clamping the rubber block 390 between the fixed arc-shaped plate 310 and the arc-shaped baffle 330. When the vehicle is bumpy, the No. 1 refrigeration unit 100 will generate an impact displacement downward. The rubber block 390 directly supports the bottom of the No. 1 refrigeration unit, relying on the elasticity of the rubber itself to buffer the collision impact between the two units, avoiding direct collision and deformation of the metal shell. When it is necessary to replace the worn rubber block 390, pull the locking block 370 to compress the spring 351 to release the locking, and flip the arc-shaped baffle 330 around the No. 2 hinge seat 320 to take out the rubber block 390. Disassembly and maintenance are convenient.

[0032] Specifically, a positioning block 610 is fixedly connected to the lower end of the rubber block 390, and a positioning rod 620 is inserted into the inside of the positioning block 610. One end of the positioning rod 620 is fixedly connected to the inner arc side of the fixed arc plate 310.

[0033] By adopting the above technical solution, when using the anti-collision component 300, the bottom positioning block 610 of the rubber block 390 is aligned with the positioning rod 620 and inserted to achieve the pre-positioning of the rubber block 390, preventing the rubber block 390 from sliding and shifting between the fixed arc plate 310 and the arc baffle 330, and ensuring that the rubber block 390 is always facing the bottom of the No. 1 refrigeration unit 100.

[0034] In this embodiment, during use: Under normal conditions, spring 351 continuously applies a pushing force to the locking block 370, ensuring that the locking block 370 remains engaged inside the locking plate 380, locking the arc-shaped baffle 330, and limiting and clamping the rubber block 390 between the fixed arc-shaped plate 310 and the arc-shaped baffle 330. When the vehicle is moving and experiencing bumps, the first refrigeration unit 100 experiences downward impact displacement, and the rubber block 390 directly supports the bottom of the first refrigeration unit. The rubber's own elasticity buffers the collision impact between the two units, preventing direct collision and deformation of the metal casing. When replacing the worn rubber block 390, pull the locking block 370 to compress the spring 351 to release the engagement, and flip the arc-shaped baffle 330 around the second hinge seat 320 to remove the rubber block 390. Disassembly and maintenance are convenient. When using the anti-collision component 300, align the bottom positioning block 610 of the rubber block 390 with the positioning rod 620 and insert it to achieve the pre-positioning of the rubber block 390, preventing the rubber block 390 from sliding or shifting between the fixed arc-shaped plate 310 and the arc-shaped baffle 330, and ensuring that the rubber block 390 is always facing the bottom of the first refrigeration unit 100.

[0035] Specifically, the vibratory compaction assembly 400 includes a base plate 410, a motor 420, a rotating rod 430, a movable rod 440, a fixed column 450, a movable frame 460, a vertical plate 470, and a vibratory compaction rod 480. The base plate 410 is fixedly connected to the bottom of the first refrigeration unit 100 and the second refrigeration unit 110. The motor 420 is fixedly connected to the upper end of the base plate 410. The rotating rod 430 is fixedly connected to the output end of the motor 420. The movable rod 440 is fixedly connected to one end of the rotating rod 430. The fixed column 450 is fixedly connected to the upper end of the movable rod 440. The movable frame 460 is slidably fitted on the surface of the fixed column 450. The vibratory compaction rod 480 is fixedly connected to one side of the movable frame 460. The vibratory compaction rod 480 is slidably connected to the inside of the vertical plate 470. The vertical plate 470 is fixedly connected to one side of the upper end of the base plate 410.

[0036] By adopting the above technical solution, when the air outlet of the refrigeration unit is icy, the motor 420 is started to drive the rotating rod 430 to rotate continuously. The rotating rod 430 drives the movable rod 440 to swing in a circular motion. The fixed column 450 moves in a circular motion synchronously with the movable rod 440. The fixed column 450 pushes and pulls the movable frame 460 to slide back and forth in the horizontal direction, thereby driving the vibrating rod 480 to reciprocate in a straight line along the vertical plate 470 to impact the refrigeration unit casing. The mechanical vibration shakes off the ice layer attached to the ventilation holes of the casing, avoiding the blockage of the ventilation holes by ice and affecting the flow of cold air.

[0037] Specifically, the vibrating rod 480 is symmetrically provided with limit strips 710 on both sides, the limit strips 710 are slidably connected to the inside of the vertical plate 470, one end of the vibrating rod 480 is fixedly connected with a spherical rubber head 730, and the surface of the motor 420 is fixedly connected with a moisture-proof protective shell 720.

[0038] By adopting the above technical solution, when using the vibratory assembly 400, the limiting strip 710 cooperates with the vertical plate 470 to restrict the vibratory rod 480 to slide horizontally back and forth only, preventing the vibratory rod 480 from rotating and causing the movable frame 460 to tilt, and avoiding the movable frame 460 from separating from the fixed column 450. The spherical rubber head 730 at the front end of the vibratory rod 480 is a flexible contact end, which reduces the rigid impact force on the shell and avoids fatigue cracking of the refrigerant pipe weld joint inside the refrigeration unit caused by long-term high-frequency vibration. The moisture-proof protective shell 720 on the outside of the motor 420 isolates the condensed water vapor inside the unit, which can prevent the motor 420 from being damaged by moisture and short circuit.

[0039] In this embodiment, during use: the motor 420 is started to drive the rotating rod 430 to rotate continuously. The rotating rod 430 drives the movable rod 440 to swing in a circular motion. The fixed column 450 moves in a circular motion synchronously with the movable rod 440. The fixed column 450 pushes and pulls the movable frame 460 to slide back and forth in the horizontal direction, thereby driving the vibrating rod 480 to reciprocate linearly along the vertical plate 470 to impact the refrigeration unit housing. The mechanical vibration shakes off the ice layer attached to the ventilation holes of the housing, preventing the ventilation holes from being blocked by ice and affecting the flow of cold air. When using the vibrating assembly 400, the limiting strip 710 and... The vertical plate 470, in conjunction with the vibrating rod 480, restricts the vibrating rod 480 to slide horizontally back and forth only, preventing the vibrating rod 480 from rotating and causing the movable frame 460 to tilt, and preventing the movable frame 460 from detaching from the fixed column 450. The spherical rubber head 730 at the front end of the vibrating rod 480 is a flexible contact end, which reduces the rigid impact force on the shell and avoids fatigue cracking of the weld joints of the refrigerant pipes inside the refrigeration unit caused by long-term high-frequency vibration. The moisture-proof protective shell 720 on the outside of the motor 420 isolates the condensed water vapor inside the unit, which can prevent the motor 420 from being damaged by moisture and short circuit.

[0040] The working principle and usage process of this invention: When using the compact dual-system refrigeration unit for refrigerated trucks, the first refrigeration unit 100 and the second refrigeration unit 110 are pushed downwards to cause the mounting block 290 to slide and assemble into the mounting plate 220. At this time, rotating the bidirectional lead screw 280 causes the sliding sleeves 270 on both sides to move away from each other synchronously. This causes the sliding sleeves 270 to pull the movable plate 250, the rotating plate 241, and the connecting plate 240 to tighten inwards synchronously. The connecting plate 240 causes the upper and lower insertion rods 230 to be inserted into the mounting block 290 respectively, so that the insertion rods 230 lock the first refrigeration unit 100 and the second refrigeration unit 110, eliminating the assembly gap reserved between the two refrigeration units, and making the first refrigeration unit 100 and the second refrigeration unit 110 tightly fitted and stacked, greatly reducing the vertical footprint of the entire unit. Utilizing space, a compact assembly is achieved. When installing two refrigeration units, the support plate 210 supports the bottom of the second refrigeration unit 110. The sponge pad 520 inside the mounting slot 510 acts as a buffer and shock absorber, reducing rigid collisions between the unit and the support plate 210 when the vehicle is bumpy, reducing operating noise, and also protecting the bottom of the unit from scratches. When rotating the double-acting screw 280, the operator can hold the protrusion 530 on the surface of the turntable 540 to rotate the double-acting screw 280. The protrusion 530 increases the friction of the hand, and the double-acting screw 280 can be rotated and locked without additional tools. The disassembly and assembly of the two units is convenient. When using the connecting component 200, the sliding sleeve 270 moves, causing the guide plate 570 to slide horizontally along the guide rod 560 to limit its movement, preventing the movable plate 250 from being stopped. When the vehicle moves and shifts, the spring 351 continuously applies a pushing force to the locking block 370 under normal conditions, ensuring that the locking block 370 remains engaged inside the locking plate 380, locking the arc-shaped baffle 330, and limiting and clamping the rubber block 390 between the fixed arc-shaped plate 310 and the arc-shaped baffle 330. When the vehicle travels bumpily, the first refrigeration unit 100 experiences downward impact displacement, and the rubber block 390 directly supports the bottom of the first refrigeration unit, relying on the elasticity of the rubber itself to buffer the impact between the two units, preventing direct collision and deformation of the metal casing. When the worn rubber block 390 needs to be replaced, pull the locking block 370 to compress the spring 351 to release the engagement, and flip open the arc-shaped baffle 330 around the second hinge seat 320 to remove the rubber block 390. Disassembly and maintenance are convenient. When using the anti-collision component 300, The bottom positioning block 610 of the rubber block 390 is aligned with the positioning rod 620 and inserted to achieve pre-positioning of the rubber block 390, preventing it from sliding or shifting between the fixed arc plate 310 and the arc baffle 330, ensuring that the rubber block 390 is always directly facing the bottom of the first refrigeration unit 100. The motor 420 is started to drive the rotating rod 430 to rotate continuously. The rotating rod 430 drives the movable rod 440 to swing in a circular motion. The fixed column 450 moves in a circular motion synchronously with the movable rod 440. The fixed column 450 pushes and pulls the movable frame 460 to slide back and forth in the horizontal direction, thereby driving the vibrating rod 480 to reciprocate linearly along the vertical plate 470 to impact the refrigeration unit housing. The mechanical vibration shakes off the ice layer attached to the ventilation holes of the housing, preventing ice blockage of the ventilation holes from affecting the flow of cold air. When using the vibrating assembly 400...The limiting strip 710 cooperates with the vertical plate 470 to restrict the vibrating rod 480 to horizontal reciprocating sliding only, preventing the vibrating rod 480 from rotating and causing the movable frame 460 to tilt, thus preventing the movable frame 460 from detaching from the fixed column 450. The spherical rubber head 730 at the front end of the vibrating rod 480 is a flexible contact end, reducing the rigid impact force on the housing and preventing fatigue cracking of the refrigerant pipe welds inside the refrigeration unit caused by long-term high-frequency vibration. The moisture-proof protective shell 720 on the outside of the motor 420 isolates the condensate inside the unit, preventing the motor 420 from being damaged by moisture and short circuits.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact dual-system refrigeration unit for refrigerated trucks, comprising a primary refrigeration unit (100), wherein a secondary refrigeration unit (110) is mounted at the lower end of the primary refrigeration unit (100), characterized in that: Connecting components (200) are provided on both sides of the No. 1 refrigeration unit (100) and the No. 2 refrigeration unit (110), and anti-collision components (300) are provided on the upper end of the No. 2 refrigeration unit (110). Vibration components (400) are provided inside the No. 1 refrigeration unit (100) and the No. 2 refrigeration unit (110).

2. The compact dual-system refrigeration unit for refrigerated trucks according to claim 1, characterized in that: The connecting assembly (200) includes a support plate (210), a mounting plate (220), a plug rod (230), a connecting plate (240), a rotating plate (241), a first hinge seat (242), a movable plate (250), a fixed plate (260), a sliding sleeve (270), a two-way lead screw (280), and a mounting block (290). Mounting blocks (290) are fixedly connected to both sides of the first refrigeration unit (100) and the second refrigeration unit (110). The mounting blocks (290) are slidably fitted inside the mounting plate (220). The lower end of the mounting plate (220) is fixedly connected to the support plate (210). A fixed support is symmetrically arranged on one side of the mounting plate (220). The fixed plate (260) is rotatably connected to a two-way screw (280). The surface of the two-way screw (280) is symmetrically threaded with a sliding sleeve (270). A movable plate (250) is fixedly connected to one side of the sliding sleeve (270). A first hinge seat (242) is fixedly connected to one side of the movable plate (250). A rotating plate (241) is hinged to the surface of the first hinge seat (242). A connecting plate (240) is hinged to one end of the rotating plate (241). Insert rods (230) are symmetrically arranged on one side of the connecting plate (240). The insert rods (230) pass through the mounting plate (220) and are inserted into the mounting block (290).

3. A compact dual-system refrigeration unit for refrigerated trucks according to claim 2, characterized in that: The upper end of the tray (210) is provided with a placement groove (510), and a sponge pad (520) is fixedly connected to the placement groove (510).

4. A compact dual-system refrigeration unit for refrigerated trucks according to claim 2, characterized in that: The lower end of the bidirectional lead screw (280) is fixedly connected to a turntable (540), and the surface of the turntable (540) is uniformly provided with protrusions (530).

5. A compact dual-system refrigeration unit for refrigerated trucks according to claim 2, characterized in that: One end of the movable plate (250) is fixedly connected to a guide plate (570), and a guide rod (560) is slidably fitted inside the guide plate (570). Both ends of the guide rod (560) are fixedly connected to side plates (550), and the side plates (550) are fixedly connected to the mounting plate (220).

6. A compact dual-system refrigeration unit for refrigerated trucks according to claim 1, characterized in that: The anti-collision assembly (300) includes a fixed arc plate (310), a second hinge seat (320), an arc baffle (330), a horizontal plate (340), a fixed rod (350), a spring (351), a limiting plate (360), a locking block (370), a locking plate (380), and a rubber block (390). The upper end of the second refrigeration unit (110) is fixedly connected to the locking plate (380), and the two ends of the locking plate (380) are symmetrically fixedly connected to the fixed arc plate (310). One end of the fixed arc plate (310) is fixedly connected to the second hinge seat (320), and the surface of the second hinge seat (320) is hinged to the arc baffle (330). One end of the arc baffle (330) is fixedly connected to... There is a horizontal plate (340), and a limit plate (360) is symmetrically arranged on one side of the horizontal plate (340). A fixed rod (350) is fixedly connected between the two limit plates (360). A locking block (370) is slidably connected to the surface of the fixed rod (350). One end of the locking block (370) is locked inside the locking plate (380). A spring (351) is sleeved on one side of the surface of the fixed rod (350). One end of the spring (351) abuts against the limit plate (360), and the other end of the spring (351) abuts against the locking block (370). A rubber block (390) is assembled between the fixed arc plate (310) and the arc baffle (330). The upper end of the rubber block (390) is in contact with the first refrigeration unit (100).

7. A compact dual-system refrigeration unit for refrigerated trucks according to claim 6, characterized in that: The lower end of the rubber block (390) is fixedly connected to a positioning block (610), and a positioning rod (620) is inserted inside the positioning block (610). One end of the positioning rod (620) is fixedly connected to the inner arc side of the fixed arc plate (310).

8. A compact dual-system refrigeration unit for refrigerated trucks according to claim 1, characterized in that: The vibrating assembly (400) includes a base plate (410), a motor (420), a rotating rod (430), a movable rod (440), a fixed column (450), a movable frame (460), a vertical plate (470), and a vibrating rod (480). The base plate (410) is fixedly connected to the bottom of the first refrigeration unit (100) and the second refrigeration unit (110). The motor (420) is fixedly connected to the upper end of the base plate (410). The output end of the motor (420) is fixed... A rotating rod (430) is connected to one end of the rotating rod (430), a movable rod (440) is fixedly connected to one end of the movable rod (440), a fixed column (450) is fixedly connected to the upper end of the movable rod (440), a movable frame (460) is slidably fitted on the surface of the fixed column (450), a vibrating rod (480) is fixedly connected to one side of the movable frame (460), the vibrating rod (480) is slidably connected to the inside of the vertical plate (470), and the vertical plate (470) is fixedly connected to the upper side of the bottom plate (410).

9. A compact dual-system refrigeration unit for refrigerated trucks according to claim 8, characterized in that: The vibrating rod (480) is symmetrically provided with limiting strips (710) on both sides. The limiting strips (710) are slidably connected to the inside of the vertical plate (470). A spherical rubber head (730) is fixedly connected to one end of the vibrating rod (480). A moisture-proof protective shell (720) is fixedly connected to the surface of the motor (420).

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