A modular assembly structure vending machine integrated refrigeration system

Abstract

This invention relates to the field of condenser technology and discloses a modularly assembled vending machine integrated refrigeration system, including a vending machine body and a refrigeration mechanism assembled inside it. The refrigeration mechanism includes an evaporator, a throttling mechanism, a condenser, and a compressor arranged sequentially from top to bottom within the vending machine body. A connecting mechanism is assembled between the input end of the condenser and the output end of the compressor. The connecting mechanism includes a connecting pipe, and a locking ring is rotatably connected to the outer circumferential surface of the connecting pipe. This modularly assembled vending machine integrated refrigeration system effectively solves the problem in the prior art where existing detachable joints mostly use threaded connections. Under long-term exposure to high-frequency vibration, start-stop impact, and alternating thermal loads of the compressor, the thread surface is prone to fretting wear, leading to a gradual decrease in the preload of the threaded pair, ultimately causing loosening of the joint and refrigerant leakage.

Description

Technical Field

[0001] This invention relates to the field of condenser technology, and more specifically to an integrated refrigeration system for vending machines with a modular assembly structure. Background Technology

[0002] Vending machines, as unattended self-service retail equipment, are widely used in various public places such as shopping malls, office buildings, communities, and transportation hubs, greatly improving the convenience of retail services. The refrigeration system is the core component of vending machines selling refrigerated and frozen beverages and fresh produce, and its performance directly determines the preservation effect of the vending machine's goods. This refrigeration system consists of four core components connected in series to form a closed loop: a compressor, a condenser, a throttling mechanism, and an evaporator. Because the compressor generates high-frequency vibrations during operation, and the refrigerant gas is in a high-temperature and high-pressure state at the exhaust port, this connection point becomes the most prone to failure and damage.

[0003] During maintenance, refrigeration pipes are often connected by brazing. However, the welding process requires the use of open flames. When the refrigeration system uses hydrocarbon flammable refrigerants such as R290 and R600a, or when the terminal is deployed in special locations such as gas stations or chemical industrial parks where open flame operations are prohibited, detachable joints are required for pipe connections.

[0004] Most existing detachable connectors use threaded connections. Under the long-term effects of high-frequency vibration, start-stop impact, and alternating thermal loads from the compressor, the threaded connection structure is prone to fretting wear on the thread surface, which leads to a reduction in the effective contact area of ​​the threaded pair and a gradual decrease in the preload, ultimately causing the connector to loosen and refrigerant to leak. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a modular assembly structure for vending machine integrated refrigeration systems. This effectively solves the problem that existing detachable joints often use threaded connections. Under long-term exposure to high-frequency vibrations, start-stop impacts, and alternating thermal loads from compressors, threaded connections are prone to fretting wear on the thread surfaces, leading to a gradual decrease in the preload of the threaded pair and ultimately causing loosening of the joint and refrigerant leakage.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a modular assembly structure for an integrated refrigeration system for vending machines, including a vending machine body and a refrigeration mechanism assembled therein. The refrigeration mechanism includes an evaporator, a throttling mechanism, a condenser, and a compressor arranged sequentially from top to bottom within the vending machine body. A connecting mechanism is assembled between the input end of the condenser and the output end of the compressor; The connecting mechanism includes a connecting pipe, on the outer circumferential surface of which a locking ring is rotatably connected. Two locking rings are provided and symmetrically distributed along the central plane of the connecting pipe. The two locking rings are respectively threaded to the input end of the condenser and the output end of the compressor. The connecting pipe is provided with a limiting component for restricting the loosening of the locking rings and a sealing component for improving the sealing performance of the connection.

[0007] Furthermore, the limiting component includes a slot opened inside the connecting pipe, and the slot has multiple slots arranged in a circumferential array along the central axis of the connecting pipe. A constraint block is slidably connected inside the slot, and the cavity formed by the constraint block and the inner wall of the slot is filled with inert gas.

[0008] Furthermore, a magnetic component is mounted on the side of the constraint block away from the locking ring, and the magnetic component is magnetically connected to the inner wall of the slot. A flexible abutment block is fixedly connected to the side of the constraint block near the locking ring.

[0009] Furthermore, the locking ring has a groove on the side near the constraint block, and there are multiple grooves arranged in an array along the central axis of the locking ring.

[0010] Furthermore, the sealing assembly includes a mounting groove formed on the side of the connecting pipe near the locking ring, and a sealing ring is fitted in the mounting groove. The connecting pipe also has an annular cavity communicating with the mounting groove, and a movable ring fitted in the annular cavity is fitted with the outer side of the sealing ring. The annular cavity has a protrusion fitted with the outer side of the movable ring.

[0011] Furthermore, the movable ring is equipped with a guide unit through slots provided inside it, and the slots are provided in multiples and distributed in a circumferential array along the central axis of the movable ring; The guide unit includes a guide rod assembled in a slot, and a return spring is sleeved on the outer circumference of the guide rod. A sleeve that fits against the outer circumference of the guide rod is fixedly connected in the annular cavity. The guide rod is connected to the inner wall of the sleeve through an elastic frame set on its outer side. A through hole is opened inside the guide rod.

[0012] Furthermore, the connecting pipe has an airflow channel that communicates with the annular cavity, and there are multiple airflow channels arranged in an array along the central axis of the connecting pipe.

[0013] Furthermore, the sealing assembly also includes a detection unit; The detection unit includes an opening groove inside a connecting pipe, an auxiliary channel communicating with the inside of a sleeve on the same side of the connecting pipe, an end cap fixedly connected to the top of the opening groove, a movable block slidably assembled inside the opening groove, and a detection rod that penetrates the end cap and extends to the outside fixedly connected inside the movable block, and a compression spring is sleeved on the outer circumference of the detection rod.

[0014] The technical solution provided by this invention has the following advantages compared with the prior art: This invention features a connecting mechanism. Inside the connecting pipe is a limiting assembly consisting of a slot, a constraint block, and a magnetic component. During compressor operation, high-temperature refrigerant heats the inert gas inside the slot via the pipe wall. The gas expansion pushes against the magnetic attraction, causing the constraint block to move towards the locking ring. The flexible abutment block and the locking ring groove form a wedge-shaped fit and a self-locking inclined surface, generating a high static friction torque. This torque counteracts the micro-rotation of the threaded pair caused by high-frequency compressor vibration and start-stop impact, suppressing joint loosening caused by vibration. Furthermore, when a small amount of refrigerant leaks from the interface, the leaking gas enters the ring cavity through the airflow channel. The increased pressure within the cavity pushes the movable ring axially, causing a secondary compression of the sealing ring, which expands radially and automatically fills the gap between the threaded pair and defects in the sealing surface, preventing continuous leakage of the small amount of refrigerant. When the leakage exceeds the self-healing threshold, the high-pressure gas in the ring cavity breaks through the elastic frame limit, opening the guide rod through-hole. The high-pressure gas enters the open slot, pushing the detection rod outward, visually displaying the excessive leakage. Fault locations can be quickly identified without the need for specialized testing tools. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the vending machine body according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the vending machine body according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the refrigeration mechanism according to an embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of the separation structure of the locking ring and the connecting tube according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the connecting mechanism according to an embodiment of the present invention; Figure 6 This is a schematic cross-sectional view of the connecting pipe and locking ring according to an embodiment of the present invention; Figure 7 This is an embodiment of the present invention. Figure 6 A magnified view of the structure at point A in the middle; Figure 8 This is an embodiment of the present invention. Figure 7 A magnified schematic diagram of the structure at point B in the middle; Figure 9 This is a schematic diagram of the three-dimensional separation structure of the guide unit in an embodiment of the present invention.

[0017] The labels in the diagram represent: 1. Vending machine body; 2. Refrigeration mechanism; 21. Evaporator; 22. Throttling mechanism; 23. Condenser; 24. Compressor; 3. Connecting mechanism; 31. Connecting pipe; 32. Locking ring; 321. Ring groove; 33. Limiting component; 331. Groove; 332. Constraint block; 333. Magnetic component; 334. Flexible abutment block; 34. Sealing component; 341. Mounting groove; 342. Sealing ring; 343. 344. Circular cavity; 3441. Movable ring; 3442. Slot; 345. Protrusion; 346. Guide unit; 3461. Guide rod; 3462. Return spring; 3463. Sleeve; 3464. Elastic frame; 3465. Through hole; 347. Airflow channel; 348. Detection unit; 3481. Opening slot; 3482. Auxiliary channel; 3483. End cap; 3484. Moving block; 3485. Detection rod; 3486. Compression spring. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example: Please see Figures 1-9 The present invention provides a technical solution: a modular assembly structure vending machine integrated refrigeration system, including a vending machine body 1 and a refrigeration mechanism 2 assembled inside it. The refrigeration mechanism 2 includes an evaporator 21, a throttling mechanism 22, a condenser 23 and a compressor 24 distributed from top to bottom in the vending machine body 1. A connecting mechanism 3 is installed between the input end of the condenser 23 and the output end of the compressor 24; The connecting mechanism 3 includes a connecting pipe 31, and a locking ring 32 is rotatably connected to the outer circumference of the connecting pipe 31. There are two locking rings 32, which are symmetrically distributed along the center plane of the connecting pipe 31. The two locking rings 32 are respectively connected to the input end of the condenser 23 and the output end of the compressor 24 by threads. The connecting pipe 31 is provided with a limiting component 33 for limiting the loosening of the locking ring 32, and a sealing component 34 for improving the sealing performance of the connection.

[0021] The limiting component 33 includes a slot 331 opened inside the connecting pipe 31, and the slot 331 has multiple slots arranged in a circular array along the central axis of the connecting pipe 31. A constraint block 332 is slidably connected inside the slot 331, and the cavity formed by the constraint block 332 and the inner wall of the slot 331 is filled with an inert gas. Helium is selected as the inert gas. Helium has an extremely high coefficient of thermal expansion, which can ensure a fast and sensitive response and achieve reliable dynamic locking. At the same time, it is non-toxic, non-flammable, non-corrosive, and will not affect other components.

[0022] A magnetic component 333 is mounted on the side of the constraint block 332 away from the locking ring 32, and the magnetic component 333 is magnetically connected to the inner wall of the slot 331. A flexible abutment block 334 is fixedly connected to the side of the constraint block 332 near the locking ring 32.

[0023] The locking ring 32 has a ring groove 321 on the side near the constraint block 332, and there are multiple ring grooves 321 arranged in an array along the central axis of the locking ring 32.

[0024] The sealing assembly 34 includes a mounting groove 341 formed on the side of the connecting pipe 31 near the locking ring 32, and a sealing ring 342 is fitted in the mounting groove 341. The connecting pipe 31 also has an annular cavity 343 that communicates with the mounting groove 341, and a movable ring 344 that fits against the outer side of the sealing ring 342 is fitted in the annular cavity 343. The annular cavity 343 has a protrusion 345 that fits against the outer side of the movable ring 344. A reserved gap is provided between the sleeve 3463 and the protrusion 345. This gap allows the refrigerant gas input from the airflow channel 347 to evenly fill the annular cavity 343, ensuring that the movable ring 344 is subjected to consistent circumferential force. In conjunction with the coaxial guide unit 346, it avoids uneven loading, allowing the sealing ring 342 to be evenly compressed, and the sealing surface to fit more stably.

[0025] The movable ring 344 is fitted with a guide unit 346 through slots 3441 provided inside it. Multiple slots 3441 are provided and are arranged in a circular array along the central axis of the movable ring 344. The guide unit 346 includes a guide rod 3461 assembled in a slot 3441, and a return spring 3462 is sleeved on the outer circumferential surface of the guide rod 3461. One end of the return spring 3462 is fixedly installed in the slot 3441, and the other end is fixedly installed on the outer circumferential surface of the guide rod 3461. A sleeve 3463 that fits against the outer circumferential surface of the guide rod 3461 is fixedly connected in the annular cavity 343. The guide rod 3461 is connected to the inner wall of the sleeve 3463 through an elastic bracket 3464 disposed on its outer side. The interior of 3461 has a through hole 3465. The elastic coefficient of the elastic frame 3464 is greater than that of the return spring 3462. When the pressure increment established in the annular cavity 343 due to a small amount of refrigerant leakage is small, the pressure force first overcomes the low resistance of the return spring 3462. At this time, the elastic frame 3464 has a higher deformation resistance and does not deform. The guide rod 3461 remains stationary. Only when the leakage intensifies to the point that it can overcome its deformation resistance will the guide rod 3461 be triggered to move as a whole and connect the detection gas path.

[0026] The connecting pipe 31 has an airflow channel 347 that communicates with the annular cavity 343, and the airflow channel 347 has multiple channels that are arranged in an array along the central axis of the connecting pipe 31.

[0027] The sealing assembly 34 also includes a detection unit 348; The detection unit 348 includes an opening slot 3481 formed in the connecting pipe 31. An auxiliary channel 3482 is formed in the connecting pipe 31 and communicates with the inside of the sleeve 3463 on the same side. An end cap 3483 is fixedly connected to the top of the opening slot 3481. A moving block 3484 is slidably assembled in the opening slot 3481. A detection rod 3485 that penetrates the end cap 3483 and extends to the outside is fixedly connected in the moving block 3484. A compression spring 3486 is sleeved on the outer circumference of the detection rod 3485. The outer circumference of the detection rod 3485 can be sprayed with a high-visibility bright coating such as yellow or red, which has a strong visual impact and can trigger the fault awareness of the operation and maintenance personnel at the first time, quickly locate the leak point and shut down for maintenance.

[0028] The working principle and advantages of the integrated refrigeration system in this modular vending machine: Installation process of connecting pipe 31: The connecting mechanism 3 of this invention adopts a double-ended symmetrical threaded assembly structure. Locking rings 32 are coaxially rotatably mounted on both ends of the connecting pipe 31. The two locking rings 32 form detachable threaded connections with the external threaded interface of the compressor 24 exhaust end and the external threaded interface of the condenser 23 inlet end, respectively. During assembly, first align both ends of the connecting pipe 31 coaxially with the exhaust end of the compressor 24 and the inlet end of the condenser 23, respectively. Then, screw the locking rings 32 on both sides in sequence. The axial feed of the threaded pair achieves rigid connection between the connecting pipe 31 and the pipes at both ends until the locking rings 32 reach the preset pre-tightening torque, thus completing the connection of the refrigeration circuit pipes.

[0029] During the thread engagement process, an elastic pre-compression seal is simultaneously achieved at the interface: an annular mounting groove 341 is provided on the end face of the connecting pipe 31, and an elastic sealing ring 342 is pre-installed in the mounting groove 341. In the unassembled state, the sealing ring 342 naturally extends out of the end face of the mounting groove 341. As the locking ring 32 is screwed in, the pipe end face of the compressor 24 or condenser 23 gradually contacts the sealing ring 342 and applies axial extrusion force, causing the sealing ring 342 to undergo radial elastic deformation. The amount of deformation fills the annular gap between the locking ring 32 and the pipe interface, forming a preliminary seal.

[0030] Meanwhile, the connecting pipe 31 is equipped with an axial anti-movement limiting structure for the sealing ring 342: an annular cavity 343 coaxially connected to the mounting groove 341 is formed inside the connecting pipe 31. An annular protrusion 345 is fixedly provided on the side of the annular cavity 343 near the sealing ring 342. The protrusion 345 forms an axial limiting fit with the end face of the movable ring 344, restricting the movable ring 344 from moving away from the sealing ring 342. This structure can effectively prevent the sealing ring 342 from driving the movable ring 344 to move axially synchronously when the pipe end face squeezes the sealing ring 342, ensuring that the sealing ring 342 obtains a stable pre-compression amount and ensuring the reliability of the initial seal.

[0031] Locking ring 32 limiting process: During normal operation of the refrigeration system, the high-temperature, high-pressure gaseous refrigerant output from compressor 24 flows through connecting pipe 31. Long-term mechanical vibration and thermal cycling can easily lead to fretting wear and preload reduction in the threaded joint, causing loosening of the interface and refrigerant leakage. This invention uses a limiting mechanism to prevent loosening of the locking ring 32 during operation. Its working principle is as follows: Multiple slots 331 are arrayed along the central axis inside the wall of the connecting pipe 31. A constraint block 332 is slidably installed in the slot 331. The constraint block 332 and the bottom of the slot 331 enclose a sealed air cavity, which is pre-filled with inert gas. A magnetic component 333 is fixedly installed at the bottom of the constraint block 332. In the initial assembly state, the magnetic component 333 and the ferromagnetic material surface of the inner wall of the slot 331 generate a magnetic attraction force, so that the constraint block 332 is completely housed inside the slot 331, ensuring that there is no interference during the locking ring 32 screwing process.

[0032] Once the system is started and enters a stable operating state, the high-temperature refrigerant in the connecting pipe 31 raises the temperature of the sealed gas chamber through heat conduction through the pipe wall. The inert gas in the gas chamber expands due to heat, generating an axial thrust. This thrust is greater than the magnetic attraction force of the magnetic component 333, thereby pushing the constraint block 332 to slide along the slot 331 toward the locking ring 32 until the flexible abutment block 334 at the end of the constraint block 332 is completely engaged with the pre-set annular groove in the locking ring 32. The annular grooves 321, which are distributed in multiple arrays, have trapezoidal cross-sections, forming a "sawtooth" structure. When the conical flexible abutment block 334 enters the annular groove 321, as the gas expansion thrust on the constraint block 332 continues to act, a wedge-shaped compression is generated between the conical surface and the side wall of the annular groove 321. Based on the principle of inclined plane self-locking, this structure can convert the axial thrust into radial expansion force, so that the flexible abutment block 334 generates a larger normal contact stress in the annular groove 321. Since the flexible abutment block 334 is made of elastic material, its radial expansion deformation further fills the internal gap of the annular groove 321, forming a tighter interference fit. The resulting static friction torque is significantly greater than that of the planar contact condition, thus more effectively suppressing the tendency of the locking ring 32 to rotate under vibration.

[0033] When the compressor 24 is not running or the system is in a shutdown and cooling state, the connecting pipe 31 and its internal limiting components 33 are at room temperature. At this time, the inert gas in the sealed chamber formed by the inner wall of the slot 331 and the constraint block 332 is at room temperature and pressure, and the flexible abutment block 334 is completely hidden inside the slot 331, maintaining a non-contact separation gap with the annular groove 321 on the side wall of the locking ring 32. In this state, the locking ring 32 can be freely rotated. When the compressor 24 starts and enters steady-state operation, since the connecting pipe 31 is usually made of a metal material with good thermal conductivity, the heat carried by the refrigerant is quickly transferred to the pipe wall and internal structure of the connecting pipe 31 through thermal conduction.

[0034] As the temperature in the groove 331 area gradually rises to the preset trigger threshold, the gas pressure in the sealed chamber increases accordingly. The flexible abutment block 334 is driven to slide along the inner wall of the groove 331 toward the locking ring 32, establishing a stable frictional contact with the inner wall of the ring groove 321. This applies axial thrust and circumferential rotational resistance to the locking ring 32, achieving dynamic locking and anti-loosening function for the threaded connection. This anti-loosening function is only activated when the compressor 24 is working. Furthermore, a channel for replenishing inert gas is provided on the connecting pipe 31.

[0035] Refrigerant leak detection process: If refrigerant leakage occurs at the compressor port 24 and condenser port 23, the refrigerant will generally leak from the connection point of the connecting pipe 31. When a small amount of refrigerant leaks at the interface, the leaked refrigerant gas first enters the airflow channel 347 located near the interface of the connecting pipe 31. The other end of the airflow channel 347 is connected to the annular cavity 343, causing the pressure inside the annular cavity 343 to increase. When the pressure inside the annular cavity 343 exceeds the preload of the return spring 3462, the pressure pushes the movable ring 344 axially along the guide unit 346 toward the sealing ring 342, further compressing the sealing ring 342 to cause secondary elastic deformation, increasing the contact area and contact pressure between the sealing ring 342 and the pipe interface, automatically filling the sealing gap caused by the loose interface, and blocking the continuous leakage of refrigerant.

[0036] The guide unit 346 consists of a guide rod 3461, a return spring 3462, a sleeve 3463, and an elastic frame 3464. The guide rod 3461 is fixedly connected to the movable ring 344, the sleeve 3463 is fixed to the wall of the annular chamber, and the return spring 3462 is sleeved on the outside of the guide rod 3461 to provide a return force for the movable ring 344. This guide structure ensures the coaxiality of the movement of the movable ring 344 and avoids sealing failure caused by uneven force on the sealing ring 342.

[0037] If the leakage worsens, a large amount of refrigerant rushes into the annular cavity 343, causing a sharp increase in pressure within the cavity. At this point, the movable ring 344 continues to move until the return spring 3462 is compressed to its limit stroke. As the pressure continues to rise and exceeds the elastic yield limit of the elastic frame 3464, the movable ring 344 will drive the guide rod 3461 to slide within the sleeve 3463. When the through hole 3465 inside the guide rod 3461 slides out of the sealed section of the sleeve 3463 and is exposed in the annular cavity 343, the high-pressure gas immediately enters the sleeve 3463 through the through hole 3465 and enters the opening groove 3481 via the connected auxiliary channel 3482.

[0038] The sudden increase in pressure within the opening slot 3481 will push the moving block 3484 to overcome the elastic force of the compression spring 3486, causing the detection rod 3485 to extend significantly axially from the end cover 3483. At this time, by visually observing the extension status of the detection rod 3485, on-site maintenance personnel can intuitively and conveniently determine that a serious leakage fault exceeding the preset threshold has occurred at any of the three connection mechanisms, thereby taking timely shutdown and maintenance measures and effectively avoiding system performance failure or safety hazards that may be caused by continuous refrigerant leakage.

[0039] It is worth noting that the elastic coefficient of the elastic frame 3464 is greater than that of the return spring 3462. Based on this differentiated design, when the pressure increment established in the annular cavity 343 due to a small amount of refrigerant leakage is small, the pressure force first overcomes the lower resistance of the return spring 3462, driving the movable ring 344 to generate axial displacement along the guide rod 3461, thereby performing secondary compression on the sealing ring 342 to achieve sealing compensation. At this time, because the elastic frame 3464 has a higher deformation resistance, there is no relative displacement between the guide rod 3461 and the movable ring 344. The guide rod 3461 remains stationary as a whole, and its internal through hole 3465 is still blocked by the sealing section of the sleeve 3463. The lower stiffness of the return spring 3462 corresponds to the first-level response threshold, which is specifically used to handle small gas leaks caused by micro-vibration, thermal stress, or slight wear, and achieves a "self-healing" function by actively reinforcing the seal.

[0040] The high stiffness of the elastic frame 3464 sets a second-level response threshold. Only when the leakage worsens to the point where it can overcome the deformation resistance will the overall displacement of the guide rod 3461 be triggered, connecting the detection gas path. This layered threshold design avoids frequent triggering of visual alarm signals due to normal pressure fluctuations or minute leakage, significantly reducing the probability of false alarms. Furthermore, during the compensating displacement of the movable ring 344 under the control of the return spring 3462, the relative position between the guide rod 3461 and the sleeve 3463 remains constant because the elastic frame 3464 does not deform, thus ensuring the stability of the gas path isolation state. This prevents the introduction of trace amounts of refrigerant into the detection unit 348 due to accidental movement of the guide rod 3461 when only sealing enhancement is required, thereby interfering with the operator's judgment of the actual leakage state. Only when the return spring 3462 reaches its compression limit and the pressure in the ring cavity 343 further rises to a level sufficient to overcome the elastic limit of the elastic frame 3464 will the overall slippage of the guide rod 3461 occur, ultimately causing the detection rod 3485 to extend outward.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modularly assembled vending machine integrated refrigeration system, comprising a vending machine body (1) and a refrigeration mechanism (2) assembled therein, characterized in that, The refrigeration mechanism (2) includes an evaporator (21), a throttling mechanism (22), a condenser (23), and a compressor (24) arranged sequentially from top to bottom within the vending machine body (1). A connecting mechanism (3) is assembled between the input end of the condenser (23) and the output end of the compressor (24). The connecting mechanism (3) includes a connecting pipe (31), on which a locking ring (32) is rotatably connected. There are two locking rings (32) symmetrically distributed along the center plane of the connecting pipe (31). The two locking rings (32) are respectively connected to the input end of the condenser (23) and the output end of the compressor (24) by threads. The connecting pipe (31) is provided with a limiting component (33) for limiting the loosening of the locking ring (32) and a sealing component (34) for improving the sealing performance of the connection.

2. The modular assembly structure of the vending machine integrated refrigeration system according to claim 1, characterized in that: The limiting component (33) includes a slot (331) opened inside the connecting pipe (31), and the slot (331) has multiple slots arranged in a circular array along the central axis of the connecting pipe (31). A constraint block (332) is slidably connected inside the slot (331), and the cavity formed by the constraint block (332) and the inner wall of the slot (331) is filled with inert gas.

3. The modular assembly structure of the vending machine integrated refrigeration system according to claim 2, characterized in that: The constraint block (332) is equipped with a magnetic component (333) on the side away from the locking ring (32), and the magnetic component (333) is connected to the inner wall of the slot (331) by magnetic force. The constraint block (332) is fixedly connected with a flexible abutment block (334) on the side near the locking ring (32).

4. The vending machine integrated refrigeration system with a modular assembly structure according to claim 3, characterized in that: The locking ring (32) has an annular groove (321) on the side near the constraint block (332), and the annular groove (321) has multiple grooves and is arranged in an array along the central axis of the locking ring (32).

5. The integrated refrigeration system for a vending machine with a modular assembly structure according to claim 1, characterized in that: The sealing assembly (34) includes a mounting groove (341) opened on the side of the connecting pipe (31) near the locking ring (32), and a sealing ring (342) is installed in the mounting groove (341). The connecting pipe (31) also has an annular cavity (343) communicating with the mounting groove (341), and a movable ring (344) that fits against the outside of the sealing ring (342) is installed in the annular cavity (343). The annular cavity (343) has a protrusion (345) that fits against the outside of the movable ring (344).

6. The vending machine integrated refrigeration system with a modular assembly structure according to claim 5, characterized in that: The movable ring (344) is fitted with a guide unit (346) through slots (3441) provided inside it. The slots (3441) are provided in multiple and are arranged in a circular array along the central axis of the movable ring (344). The guide unit (346) includes a guide rod (3461) assembled in a slot (3441), and a return spring (3462) is sleeved on the outer circumference of the guide rod (3461). A sleeve (3463) that fits against the outer circumference of the guide rod (3461) is fixedly connected in the annular cavity (343). The guide rod (3461) is connected to the inner wall of the sleeve (3463) through an elastic frame (3464) set on its outer side. A through hole (3465) is opened inside the guide rod (3461).

7. The vending machine integrated refrigeration system with a modular assembly structure according to claim 6, characterized in that: The connecting pipe (31) has an airflow channel (347) that communicates with the annular cavity (343), and the airflow channel (347) has multiple channels that are arranged in an array along the central axis of the connecting pipe (31).

8. The vending machine integrated refrigeration system with a modular assembly structure according to claim 5, characterized in that: The sealing assembly (34) also includes a detection unit (348); The detection unit (348) includes an opening groove (3481) opened in the connecting pipe (31), and an auxiliary channel (3482) connected to the inside of the sleeve (3463) on the same side of the connecting pipe (31). An end cap (3483) is fixedly connected to the top of the opening groove (3481). A moving block (3484) is slidably assembled in the opening groove (3481), and a detection rod (3485) that penetrates the end cap (3483) and extends to the outside is fixedly connected in the moving block (3484). A compression spring (3486) is sleeved on the outer circumference of the detection rod (3485).

Images