A small freezer and its application on a recreational vehicle

Abstract

The application belongs to the technical field of ice cabinets, and particularly discloses a small ice cabinet and application thereof to a house car, which comprises an ice cabinet body, a hinge seat is arranged at the top rear side of the ice cabinet body, an ice cabinet sealing cover is hingedly connected to the top rear side of the ice cabinet body through the hinge seat, a refrigeration supply mechanism is arranged at the bottom of the ice cabinet body, a communication mechanism is arranged at the inner bottom of the ice cabinet body, a storage mechanism is fixedly installed at the inner rear side of the ice cabinet body, and a cold air injection mechanism is fixedly installed at the inner side of the ice cabinet body outside the storage mechanism. During application of the technical scheme, the core mechanisms are cooperatively matched, so that the automatic cold air supplement reliability, the article storage convenience and the cold air supplement uniformity can be considered during use, the overall practicability and adaptability are improved, and the problem that the ice cabinet adapted to the house car has poor use experience under complex working conditions and cannot meet the diversified low-temperature storage requirements during house car travel is solved.

Description

Technical Field

[0001] This invention belongs to the field of freezer technology, and in particular to a small freezer and its application in a motorhome. Background Technology

[0002] Freezers (also known as refrigerators) are key equipment for preserving food and other items at low temperatures, and are widely used in daily life and production. Especially in the high temperatures of summer, they can effectively slow down the rate of food spoilage and significantly extend the shelf life of food, providing reliable protection for the low-temperature storage of items. However, traditional freezers have many limitations and cannot meet the needs of special scenarios. On the one hand, traditional freezers are generally bulky and tall, and their structural design is only suitable for fixed indoor placement, making them inflexible for installation in the limited space inside vehicles, ships, and other vehicles. On the other hand, traditional freezers mostly use AC power, while the power supply systems of vehicles, ships, and other vehicles are DC. If traditional freezers are to be used, an inverter must be added for AC-DC conversion, which not only increases the cost of use but also reduces the stability of the power supply, causing great inconvenience to users.

[0003] To address some of the aforementioned issues, Chinese Patent No. CN217357715U discloses a small freezer. This freezer features an optimized structural design with a flat bottom and a small support frame, reducing the support height and making fuller use of space. This makes it easy to install and use in small spaces such as RVs and ships. Furthermore, this small freezer is compatible with DC power and can be powered by solar panels or energy storage boxes, expanding its application in impoverished areas without electricity, areas with frequent power outages, and in long-distance transport vehicles, tourist buses, and ocean-going vessels. This, to some extent, compensates for the shortcomings of traditional freezers.

[0004] However, the aforementioned small freezers still have obvious defects and shortcomings in actual application, making it difficult to adapt to the complex usage environment of vehicles. Specifically, the small freezers are mainly designed for vehicles such as ships and RVs, which inevitably experience bumpy conditions during travel or navigation. RVs, in particular, are often used for travel and often face complex road conditions. Severe bumps can easily damage the freezer itself, with the circuit system and refrigeration electronic components being particularly vulnerable. When the freezer experiences circuit failure or damage to refrigeration components due to bumps, its refrigeration function will immediately fail. Furthermore, the existing structure lacks an emergency mechanism for automatically replenishing cold air.

[0005] Furthermore, if RVs or other vehicles encounter unexpected situations such as running out of fuel while traveling in the wild, the power supply will be interrupted, causing the freezer to lose its cooling capacity. Once the freezer loses its cooling function, the items stored inside will spoil rapidly in a short period of time, causing property damage to the user. At the same time, if stranded in the wilderness, the rapid spoilage of food will also quickly cause a food crisis. It is evident that the existing small freezers adapted for use with vehicles lack the function of automatically replenishing cold air in emergency scenarios such as power outages or failure of refrigeration electronic components, and cannot guarantee the continuity of low-temperature storage of items. The overall reliability of use needs to be improved. Therefore, it is urgent to improve the design of the existing freezer structure. Summary of the Invention

[0006] The purpose of this invention is to provide a small freezer and its application in a motorhome, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides a small freezer, including a freezer body, a hinge seat on the top rear side of the freezer body, a freezer sealing cover hinged to the top rear side of the freezer body via the hinge seat, a freezing supply mechanism at the bottom of the freezer body, a communication mechanism at the bottom of the freezer body, a storage mechanism fixedly installed on the rear side of the freezer body, a cold air injection mechanism fixedly installed inside the freezer body outside the storage mechanism, the freezer body being connected to the cold air injection mechanism via the communication mechanism, and a heat preservation one-way exhaust valve at the top center of the freezer sealing cover;

[0008] The communication mechanism includes a manually pressable high-pressure valve and an elastic pressing module. The manually pressable high-pressure valve is fixedly connected to the middle of the bottom of the freezer body, and the elastic pressing module is fixedly connected to one side of the bottom of the freezer body. A valve pressing switch is provided in the middle of one side of the manually pressable high-pressure valve.

[0009] The elastic pressing module includes a side rail frame, which is fixedly connected to one side of the bottom of the freezer body. A temperature-controlled telescopic spring is fixedly connected inside the side rail frame. The temperature-controlled telescopic spring is specifically set as a binary nickel-titanium alloy spring. A slider is fixedly connected to the outer end of the temperature-controlled telescopic spring. A shaft is fixedly connected to the side of the slider away from the temperature-controlled telescopic spring. The outer end of the shaft passes through the side rail frame and is fixedly connected to a pressing push plate.

[0010] Furthermore, the input end of the manually press-type high-pressure valve is connected to the refrigeration supply mechanism, and the output end of the manually press-type high-pressure valve is connected to the cold air injection mechanism. When the temperature-controlled telescopic spring is heated and extended, it can push the press plate to press the valve to open the manually press-type high-pressure valve.

[0011] Furthermore, the refrigeration supply mechanism includes a tank body located at the bottom of the freezer body. Mounting sleeves are fixedly installed on both sides of the tank body. A high-pressure nitrogen compressor tank is bolted into the interior of each mounting sleeve. A three-way valve is provided at the output end of the high-pressure nitrogen compressor tank. Both input ends of the three-way valve are connected to the high-pressure nitrogen compressor tank. The output end of the three-way valve is connected to the input end of a manually operated high-pressure valve.

[0012] Furthermore, a pressure gauge is fixedly connected to the rear side of the three-way valve, and the pressure detection end of the pressure gauge is located inside the three-way valve. The pressure gauge is used to detect the pressure inside the high-pressure nitrogen compression tank. Support feet are fixedly connected to the four corners of the bottom of the freezer body, and a non-slip base plate with protrusions is fixedly connected to the bottom of the support feet. The external corners of the freezer body and the freezer sealing cover are all rounded.

[0013] Furthermore, the storage mechanism includes a slide, a moving module, and a supporting module. The slide is located in the middle of the rear side of the freezer body, the moving module is installed inside the slide, and the supporting module is fixedly connected to the moving end of the moving module.

[0014] The moving module includes a low-temperature resistant motor and a lead screw. The low-temperature resistant motor is installed at the bottom of the slide groove by screws. The lead screw is rotatably connected to the inside of the slide groove. The output end of the low-temperature resistant motor is connected to the bottom of the lead screw through a coupling. A sliding block is threaded onto the outer surface of the lead screw. The sliding block is slidably connected to the inside of the slide groove. The bearing module is fixedly connected to the front of the sliding block.

[0015] Furthermore, the load-bearing module includes a connecting arm, which is fixedly connected to the side of the sliding block away from the slide groove. The outer end of the connecting arm is fitted with a load-bearing base plate by screws. The top of the load-bearing base plate is fixedly connected with a load-bearing mesh cabinet. The interior of the load-bearing mesh cabinet is fixedly connected with load-bearing grid plates arranged linearly at equal intervals.

[0016] Furthermore, side base plates are fixedly installed at the four corners of the supporting base plate, and side supporting mesh boxes are fixedly installed on the top of the side base plates. Supporting partition plates are fixedly connected to the inner side of the side supporting mesh boxes in a linear arrangement at equal intervals. The cold air injection mechanism is located between the inner side of the side supporting mesh boxes and the supporting mesh cabinet.

[0017] Furthermore, the cold air injection mechanism includes a rotary joint and an annular rail. The rotary joint is rotatably connected to the top of the valve push switch, and the annular rail is fixedly connected to the upper interior of the freezer body. Adjustable limit groups are movably connected at equal intervals inside the annular rail. Cold air exhaust pipes are fixedly connected to the inner sides of the adjustable limit groups. The cold air exhaust pipes and the annular rail are located between the inner sides of the side support mesh box and the support mesh cabinet. Cold air nozzles are fixedly connected at equal intervals in a linear arrangement on both sides of the cold air exhaust pipes near the side support mesh box and the support mesh cabinet. High-pressure hoses are fixedly connected at equal intervals in an annular arrangement on the outer side of the rotary joint. The output end of the high-pressure hoses is connected to the bottom end of each cold air exhaust pipe.

[0018] Furthermore, the adjustable limiting assembly includes a movable block and limiting holes. The movable block is slidably connected to the inside of the annular rail. A limiting arm is fixedly connected to the inner side of the movable block. A top rail frame is fixedly connected to the top of the limiting arm. A limiting spring is fixedly connected to the inner side of the top rail frame. A displacement block is fixedly connected to the top of the limiting spring. A through shaft is fixedly connected to the top of the displacement block. A limiting plate is fixedly connected to the top of the through shaft through the top rail frame. A retaining shaft is fixedly connected to the bottom end of the limiting plate away from the through shaft. The limiting holes are evenly spaced and arranged in a ring on the top of the annular rail. The end of the retaining shaft is inserted into the corresponding limiting hole. An adjusting pull ring is fixedly connected to the top of the limiting plate.

[0019] The present invention also discloses a motorhome, including the aforementioned small freezer, which provides frozen storage space for the motorhome and maintains the frozen storage effect in the event of electrical system failure or power outage of the motorhome.

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

[0021] Firstly, by setting up a refrigeration supply mechanism and a connecting mechanism, the cold air replenishment process can be automatically triggered during use when the RV experiences a power outage or a refrigeration component malfunctions. This allows for a continuous and stable supply of cold air to the storage area without manual intervention. The parallel high-pressure nitrogen compressor tank of the refrigeration supply mechanism enhances the continuity of the cold air supply. Combined with the manual regulating valve at the three-way valve, the opening and closing of the cold air replenishment can be flexibly controlled externally. When automatic cold air replenishment is not required, the nitrogen tank can be closed in time to save resources. The pressure gauge on the back of the three-way valve can also provide real-time feedback on the remaining nitrogen required for cold air replenishment, allowing users to plan nitrogen replenishment in advance. This series of designs achieves the effect of ensuring the continuity of low-temperature storage and the controllability of cold air replenishment. It solves the problems in the prior art where the freezer cannot automatically replenish cold air when the power is out or malfunctions, leading to the rapid deterioration of stored items, as well as the uncontrollable cold air replenishment process, difficulty in grasping the remaining nitrogen, and inability to make emergency preparations in advance.

[0022] Secondly, in this invention, by setting up a moving module, the supporting mechanism can be automatically adjusted to extend smoothly from inside the freezer body during use with the help of the low-temperature resistant motor, lead screw and other components inside the module. This allows for convenient and quick retrieval of stored items without manual dragging, greatly improving the convenience of daily use. Even if the RV loses power and the moving module cannot operate automatically, the user can still manually reach in and retrieve items through the gap of the ring rail without disassembling any parts. The operation is simple and efficient. This dual storage and retrieval design achieves a comprehensive improvement in the convenience of use, solving the problem that the supporting mechanism of the freezer in the prior art is mostly a fixed structure or requires manual and laborious pulling, which makes storage and retrieval inconvenient, especially after a power outage, there is a lack of convenient ways to retrieve items and it is difficult to retrieve items quickly.

[0023] Thirdly, in this invention, by setting an adjustable limit group and a cold air injection mechanism, the position of cold air replenishment can be flexibly adjusted according to the distribution density and size of the stored items during use. The movement and fixation of the cold air exhaust pipe can be completed simply by adjusting components such as pull rings. The operation is convenient and the positioning is accurate. At the same time, the cold air exhaust pipe of the cold air injection mechanism can evenly spray cold air to each storage area through nozzles on both sides. Combined with the smooth cold air flow channel formed by the grid plate and partition plate in the bearing area, the cold air can quickly cover all storage spaces, avoiding insufficient cold air in some areas. This design achieves the effect of uniform cold air replenishment and adapting to diverse storage needs. It solves the problems of the fixed position of cold air replenishment in the existing freezer, which cannot be flexibly adjusted according to the storage situation of the items, and the uneven distribution of cold air leads to poor freezing effect of some items, making it difficult to adapt to the storage needs of different volumes and distribution states. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure viewed from below in this invention;

[0026] Figure 3 This is a front view schematic diagram of the storage mechanism in its extended state in this invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the storage mechanism in its extended state in this invention;

[0028] Figure 5 This is a schematic diagram of the structure of the refrigeration supply mechanism and the cold air injection mechanism in this invention;

[0029] Figure 6 This is a schematic diagram of the separated state structure of the annular rail and adjustable limit group of the cold air injection mechanism in this invention.

[0030] Figure 7 This is a schematic diagram of the front view of the load-bearing module in this invention;

[0031] Figure 8 This is a schematic diagram of the rear view structure of the load-bearing module in this invention;

[0032] Figure 9 In this invention Figure 5 A magnified structural diagram at point A;

[0033] Figure 10 In this invention Figure 6 A magnified structural diagram at point B.

[0034] In the diagram: 1. Freezer body; 2. Hinge seat; 3. Freezer sealing cover; 4. Freezing supply mechanism; 41. Tank; 42. Mounting sleeve; 43. High-pressure nitrogen compressor tank; 44. Three-way valve; 45. Pressure gauge; 5. Connecting mechanism; 51. Manual push-button high-pressure valve; 52. Elastic push-button module; 521. Side rail; 522. Temperature-controlled telescopic spring; 523. Slider; 524. Shaft; 525. Push-button plate; 53. Valve push-button switch; 6. Storage mechanism; 61. Slide groove; 62. Moving module; 621. Low-temperature resistant motor; 622. Lead screw; 623. Sliding block; 63. Bearing module; 631. Connecting arm; 632 633. Bearing base plate; 634. Bearing mesh cabinet; 635. Bearing mesh plate; 636. Side base plate; 637. Side bearing mesh box; 638. Bearing partition plate; 79. Cold air injection mechanism; 70. Rotary joint; 71. Circular rail; 72. Adjustable limit assembly; 731. Movable block; 732. Limiting arm; 733. Limiting hole; 74. Top rail frame; 75. Limiting spring; 76. Displacement block; 77. Through shaft; 78. Limiting plate; 79. Locking shaft; 7310. Adjusting pull ring; 74. Cold air exhaust pipe; 75. Cold air nozzle; 76. High pressure hose; 8. Insulated one-way exhaust valve; 9. Support foot; 10. Anti-slip base plate. Detailed Implementation

[0035] Example

[0036] Please see Figures 1-10 In this embodiment of the invention, a small freezer and its application in a motorhome includes a freezer body 1, a hinge seat 2 on the top rear side of the freezer body 1, a freezer sealing cover 3 hinged to the top rear side of the freezer body 1 via the hinge seat 2, a freezing supply mechanism 4 at the bottom of the freezer body 1, a communication mechanism 5 at the bottom inside the freezer body 1, a storage mechanism 6 fixedly installed on the rear inside the freezer body 1, a cold air injection mechanism 7 fixedly installed inside the freezer body 1 outside the storage mechanism 6, the freezer body 1 being connected to the cold air injection mechanism 7 via the communication mechanism 5, and a heat-insulating one-way exhaust valve 8 at the top center of the freezer sealing cover 3.

[0037] The connecting mechanism 5 includes a manually pressable high-pressure valve 51 and an elastic pressing module 52. The manually pressable high-pressure valve 51 is fixedly connected to the middle of the bottom of the freezer body 1, and the elastic pressing module 52 is fixedly connected to one side of the bottom of the freezer body 1. A valve pressing switch 53 is provided in the middle of one side of the manually pressable high-pressure valve 51.

[0038] The elastic pressing module 52 includes a side rail frame 521, which is fixedly connected to one side of the bottom of the freezer body 1. A temperature-controlled telescopic spring 522 is fixedly connected inside the side rail frame 521. The temperature-controlled telescopic spring 522 is specifically set as a binary nickel-titanium alloy spring. A slider 523 is fixedly connected to the outer end of the temperature-controlled telescopic spring 522. A shaft 524 is fixedly connected to the side of the slider 523 away from the temperature-controlled telescopic spring 522. A pressing push plate 525 is fixedly connected to the outer end of the shaft 524 through the side rail frame 521.

[0039] During application, this device achieves stable low-temperature storage, ensures safe use, and improves refrigeration adaptability. The hinged connection between the freezer body 1 and the freezer sealing cover 3 allows for convenient opening and closing while maintaining the airtightness of the storage space, reducing cold loss. The interconnected design of the refrigeration supply mechanism 4, the connecting mechanism 5, and the cold air injection mechanism 7 ensures stable cold energy delivery to the freezer body 1, meeting low-temperature storage requirements. The temperature-controlled telescopic spring 522, made of binary nickel-titanium alloy, accurately responds to temperature changes. Combined with the elastic pressing module 52 and the manually pressed high-pressure valve 51, it enables precise control of cold energy supply, preventing cold energy waste. The insulated one-way exhaust valve 8 balances the internal pressure of the freezer, preventing excessive pressure from causing structural damage. Its insulation properties further reduce cold energy loss, ensuring refrigeration efficiency. The overall design is suitable for RV use scenarios, stably performing low-temperature storage functions and improving reliability and safety.

[0040] Please see Figures 3-6The input end of the manual press-type high-pressure valve 51 is connected to the refrigeration supply mechanism 4, and the output end of the manual press-type high-pressure valve 51 is connected to the cold air injection mechanism 7. When the temperature control extension spring 522 is in the heated and extended state, it can push the press plate 525 and the press valve switch 53 to open the manual press-type high-pressure valve 51. The refrigeration supply mechanism 4 includes a tank 41, which is located at the bottom of the freezer body 1. Both sides of the tank 41 are fixedly installed with mounting sleeves 42. A high-pressure nitrogen compression tank 43 is installed inside the mounting sleeves 42 by bolts. The output end of the high-pressure nitrogen compressor tank 43 is equipped with a three-way valve 44. Both input ends of the three-way valve 44 are connected to the high-pressure nitrogen compressor tank 43. The output end of the three-way valve 44 is connected to the input end of the manual push-button high-pressure valve 51. A pressure gauge 45 is fixedly connected to the rear side of the three-way valve 44. The pressure detection end of the pressure gauge 45 is located inside the three-way valve 44. The pressure gauge 45 is used to detect the pressure inside the high-pressure nitrogen compressor tank 43. Support feet 9 are fixedly connected to the four corners of the bottom of the freezer body 1. The bottom of the support feet 9 is fixedly connected to a protruding part. The anti-slip base plate 10, the freezer body 1, and the freezer sealing cover 3 all have rounded corners. During application, this device can achieve stable emergency cooling, improve safety, and adapt to the bumpy conditions of RVs. The refrigeration supply mechanism 4 can stably provide the high-pressure nitrogen required for cooling. It works with the three-way valve 44 to achieve dual-tank coordinated gas supply, ensuring continuous and stable cooling. The pressure gauge 45 can provide real-time pressure feedback, allowing users to easily monitor the nitrogen balance and avoid affecting the cooling effect due to insufficient nitrogen. The temperature control telescopic spring 522 and the elastic pressing module... 52. The manual press-type high-pressure valve 51 enables automatic and precise control of cooling supply, ensuring timely cooling and avoiding waste. The support feet 9 and the raised anti-slip base 10 enhance the stability of the freezer and reduce displacement during RV travel. The rounded corner design reduces the risk of collision damage and improves safety. The insulated one-way exhaust valve 8 balances internal pressure, prevents structural damage, reduces cooling loss, and ensures cooling efficiency. The overall design fully adapts to the needs of RV use, improving the reliability and practicality of low-temperature storage.

[0041] Please see Figures 3-4 and Figures 7-8The storage mechanism 6 includes a slide 61, a moving module 62, and a supporting module 63. The slide 61 is located in the middle of the rear side inside the freezer body 1. The moving module 62 is installed inside the slide 61, and the supporting module 63 is fixedly connected to the moving end of the moving module 62. The moving module 62 includes a low-temperature resistant motor 621 and a lead screw 622. The low-temperature resistant motor 621 is installed at the bottom of the slide 61 by screws, and the lead screw 622 is rotatably connected to the inside of the slide 61. The output end of the low-temperature resistant motor 621 is connected to the bottom of the lead screw 622 through a coupling. A sliding block is threaded onto the outer surface of the lead screw 622. 623, the sliding block 623 is slidably connected to the inside of the slide groove 61, and the bearing module 63 is fixedly connected to the front of the sliding block 623. The bearing module 63 includes a connecting arm 631, which is fixedly connected to the side of the sliding block 623 away from the slide groove 61. The outer end of the connecting arm 631 is screwed onto a bearing base plate 632. A bearing mesh cabinet 633 is fixedly connected to the top of the bearing base plate 632. Bearing mesh plates 634 are fixedly connected at equal intervals in a linear arrangement inside the bearing mesh cabinet 633. Side base plates 635 are fixedly installed at the four corners of the bearing base plate 632. A side-supporting mesh box 636 is fixedly installed on the top of the storage mechanism 6. Supporting partition plates 637 are linearly arranged at equal intervals on the inner side of the side-supporting mesh box 636. A cold air injection mechanism 7 is located between the inner sides of the side-supporting mesh box 636 and the support mesh cabinet 633. During application, this device can improve storage adaptability, optimize cooling uniformity, and facilitate the storage and retrieval of items. The moving module 62 of the storage mechanism 6 can drive the supporting module 63 to flexibly adjust its position. Combined with the supporting mesh plate 634 inside the support mesh cabinet 633 and the supporting partition plate 637 inside the side-supporting mesh box 636, it can optimize the storage space. The rational division adapts to the classification and storage needs of items of different sizes and types, improving space utilization. The cold air injection mechanism 7 is set between the inner side of the side support mesh box 636 and the support mesh cabinet 633, allowing the cold air to cover the entire storage area more directly, ensuring uniform cooling in each area and avoiding poor freezing effect in some areas. At the same time, the design of the moving module 62 driving the support module 63 for adjustment makes it convenient for users to quickly store and retrieve items, reducing the cumbersome operation during the retrieval process. Combined with the original structure's sealing, heat preservation and pressure balancing functions, it further improves the reliability and ease of use of low-temperature storage.

[0042] Please see Figures 3-6 and Figures 9-10The cold air injection mechanism 7 includes a rotary joint 71 and an annular rail 72. The rotary joint 71 is rotatably connected to the top of the valve push switch 53. The annular rail 72 is fixedly connected to the upper interior of the freezer body 1. Adjustable limit groups 73 are movably connected at equal intervals inside the annular rail 72. Cold air exhaust pipes 74 are fixedly connected to the inner sides of the adjustable limit groups 73. The cold air exhaust pipes 74 and the annular rail 72 are located between the inner sides of the side support mesh box 636 and the support mesh cabinet 633. Cold air nozzles 75 are fixedly connected to both sides of the cold air exhaust pipes 74 near the side support mesh box 636 and the support mesh cabinet 633 in a linear arrangement at equal intervals. Cold air nozzles 75 are fixedly connected to the outer sides of the rotary joint 71 at equal intervals. High-pressure hoses 76 are fixedly connected in a ring, with the output ends of the high-pressure hoses 76 connected to the bottom ends of each air-cooled exhaust pipe 74. An adjustable limiting assembly 73 includes a movable block 731 and a limiting hole 733. The movable block 731 is slidably connected to the inside of the ring rail 72. A limiting arm 732 is fixedly connected to the inner side of the movable block 731. A top rail frame 734 is fixedly connected to the top of the limiting arm 732. A limiting spring 735 is fixedly connected to the inner side of the top rail frame 734. A displacement block 736 is fixedly connected to the top of the limiting spring 735. A through shaft 737 is fixedly connected to the top of the displacement block 736. The top end of the through shaft 737 passes through the top rail frame 733. 4. A fixed limiting plate 738 is connected. A retaining shaft 739 is fixedly connected to the bottom end of the limiting plate 738 away from the through shaft 737. Limiting holes 733 are evenly spaced and arranged in a ring on the top of the annular rail 72. The end of the retaining shaft 739 is inserted into the corresponding limiting hole 733. An adjusting pull ring 7310 is fixedly connected to the top of the limiting plate 738. During the application of this device, it can improve the flexibility of refrigeration, ensure uniform coverage of cold air, and facilitate the adjustment of the refrigeration area. The annular rail 72 of the cold air injection mechanism 7 cooperates with the adjustable limiting group 73 to realize the flexible movement and fixation of the cold air exhaust pipe 74, which is convenient for adjusting the distribution of stored items. The cooling zone can be adjusted to suit different storage needs. The cold air nozzles 75, which are evenly spaced on both sides of the cold air exhaust pipe 74, can evenly spray cold air onto the storage areas of the side support cage 636 and the support cage 633, avoiding insufficient local cold air from affecting the freezing effect. The cooperation between the rotary joint 71 and the high-pressure hose 76 can ensure the continuity and stability of cold air delivery and reduce the risk of pipe twisting and damage. The setting of the adjustment pull ring 7310 makes the operation of the adjustable limit group 73 more convenient, and the adjustment of the cooling zone can be completed without complicated tools. Combined with the classification storage function of the original storage mechanism 6, the practicality and adaptability of low temperature storage are further improved.

[0043] The application of mini-freezers in RVs: These freezers provide frozen storage space for RVs, maintaining frozen storage in the event of electrical system failure or power outage.

[0044] The working principle of this invention is as follows: Before the device is put into use on the RV, initial setup is completed. A cooling supply mechanism 4 is installed, and the tank 41 provides installation space for the high-pressure nitrogen compressor tank 43. The mounting sleeve 42 uses bolts to detachably fix the high-pressure nitrogen compressor tank 43, ensuring it will not shift during RV travel. Two high-pressure nitrogen compressor tanks 43 are connected in parallel via a three-way valve 44. A manual adjustment valve is also provided at the three-way valve 44, allowing manual switching of the high-pressure nitrogen compressor tanks 43 during use. When automatic cooling is not required, the high-pressure nitrogen compressor tank 43 can be shut off. This parallel setup... The two tanks can work together to supply gas, improving the continuity of the cold air supply. The pressure gauge 45 on the back of the three-way valve 44 monitors the pressure inside the tank in real time, allowing users to easily monitor the remaining nitrogen level. The support feet 9 at the bottom of the freezer body 1 cooperate with the anti-slip base plate 10 to increase the friction between the freezer and the RV mounting surface, thereby reducing the displacement of the freezer when the RV is bumpy. The external edges of the freezer body 1 and the freezer sealing cover 3 are rounded to reduce structural damage caused by edge collisions during bumpy rides. The storage mechanism 6 is set up, and its initial setting is completed by the moving module 62. During use, the moving module 62 can automatically adjust the load-bearing module 63 to extend from inside the freezer body 1. For convenient and quick access to stored items, in practical applications, the low-temperature resistant motor 621 starts and drives the lead screw 622 to rotate via a coupling. The lead screw 622 drives the sliding block 623 to slide along the slide groove 61, thereby driving the connecting arm 631 and the supporting base plate 632 to move synchronously, realizing the height adjustment of the supporting mesh cabinet 633 and the side supporting mesh box 636. This allows for convenient and quick extension of the supporting module 63 from the inside of the freezer body 1. The supporting mesh plate 634 inside the supporting mesh cabinet 633 and the supporting partition plate 637 inside the side supporting mesh box 636 divide the storage space into multiple independent areas, facilitating the classification and storage of items while allowing cold air to flow more smoothly within the storage space. The initial position of the cold air injection mechanism 7 is adjusted by the adjustable limit group 73. Pulling the adjustment ring 7310 moves the displacement block 736 upward. The displacement block 736 stretches the limit spring 735 and moves the limit plate 738 upward through the through shaft 737, so that the locking shaft 739 disengages from the limit hole 733. At this time, the movable block 731 can slide along the annular rail 72 and move the cold air exhaust pipe 74 synchronously. The position of the cold air exhaust pipe 74 can be adjusted according to the distribution and size of the stored items. After the adjustment is completed, the adjustment ring 7310 is released, the limit spring 735 resets and drives the locking shaft 739 to insert into the corresponding limit hole 733 to complete the fixation.

[0045] After initial setup, the device enters the normal operating phase. Under normal conditions, the device achieves cooling through the existing circuit system. The refrigeration supply mechanism 4, the connecting mechanism 5, and the cold air injection mechanism 7 are in standby mode. When the RV loses power or the freezer's circuit system or refrigeration electronic components malfunction, the internal temperature of the freezer gradually rises. At this time, the device's emergency cooling function is automatically triggered. In the event of a power outage, a hand can be inserted through the gap in the annular rail 72 to manually remove stored items. When the temperature rises to the phase change initiation temperature of the temperature-controlled telescopic spring 522, the temperature-controlled telescopic spring 522, which is a binary nickel-titanium alloy spring, begins to activate. The stretching deformation originates from the temperature-induced phase transformation of the crystal structure. At low temperatures, the spring, which is in the martensitic phase, remains in a contracted state. When the temperature reaches the phase transformation initiation temperature, the crystal structure transforms into the austenitic phase, which is accompanied by a change in volume and shape, resulting in stretching. During the stretching process, the slider 523 is pushed to slide along the side rail 521. The slider 523 drives the pressing plate 525 to move synchronously through the shaft 524. The side rail 521 provides precise guidance for the sliding of the slider 523, ensuring that the pressing plate 525 accurately presses the valve pressing switch 53 of the manual pressing high-pressure valve 51, so that the manual pressing high-pressure valve 51 can be opened smoothly.

[0046] After the manual press-type high-pressure valve 51 is opened, the high-pressure nitrogen in the high-pressure nitrogen compression tank 43 in the refrigeration supply mechanism 4 enters the input end of the manual press-type high-pressure valve 51 through the three-way valve 44, and is delivered to the cold air injection mechanism 7 through the output end. The high-pressure hose 76 delivers the high-pressure nitrogen from the rotary joint 71 to each cold air exhaust pipe 74. The rotary joint 71 allows the high-pressure hose 76 to rotate adaptively when the position of the cold air exhaust pipe 74 is adjusted or when the freezer is slightly bumped, avoiding damage to the high-pressure hose 76 due to twisting, thereby ensuring the continuity of nitrogen delivery. The cold air exhaust pipe 74 sprays the high-pressure nitrogen evenly onto the storage area of ​​the carrier mesh cabinet 633 and the side carrier mesh box 636 through the cold air nozzles 75 on both sides. The cooling is achieved by using the principle of heat absorption by the adiabatic expansion of high-pressure nitrogen, maintaining the frozen state of the stored items. The cold air exhaust pipe 74, which has been adjusted according to the distribution of items, can ensure that items in different areas receive sufficient cooling.

[0047] During the cold air injection process, the internal pressure of the freezer gradually increases with the injection of nitrogen. At this time, the heat-insulating one-way exhaust valve 8 on the top of the freezer sealing cover 3 automatically opens to discharge the excess nitrogen that has heated up after absorbing heat, thereby balancing the internal pressure of the freezer and preventing excessive internal pressure from causing the freezer seal to fail or the structure to be damaged. The heat-insulating design of the heat-insulating one-way exhaust valve 8 reduces the loss of cold energy through the valve body and improves the cooling efficiency. Its one-way conduction characteristic prevents outside air from entering the freezer and causing the temperature to rise. When the internal temperature of the freezer drops below the phase change end temperature of the temperature-controlled extension spring 522 due to nitrogen cooling, the temperature-controlled extension spring 522 contracts and resets, driving the slider 523, shaft 524 and pressing push plate 525 to move in the opposite direction. The pressing push plate 525 disengages from the valve pressing switch 53, and the manual pressing high-pressure valve 51 automatically closes, stopping the nitrogen supply and forming a complete temperature-driven nitrogen cooling cycle. This cycle continues until the high-pressure nitrogen is exhausted or the freezer circuit system returns to normal.

[0048] This technical solution, by setting up a refrigeration supply mechanism 4 and a connecting mechanism 5, enables automatic emergency refrigeration to be triggered when the RV experiences a power outage or a refrigeration component malfunctions. This requires no manual intervention and is independent of the RV's power supply, solving the problems of existing freezers lacking emergency refrigeration functions, leading to rapid spoilage of items and failure to refrigerate when there is a lack of oil or power. The addition of a movable module 62 and an adjustable limit group 73 improves the convenience of retrieving and placing items and the uniformity of refrigeration, overcoming the shortcomings of inconvenient retrieval and fixed refrigeration areas in existing technologies. The inclusion of an insulated one-way exhaust valve 8 and a supportive anti-slip structure ensures stable operation of the device, adapting to the bumpy conditions of the RV and solving the problem of damage due to abnormal pressure or vibration in existing technologies. The inclusion of a three-way valve 44, a manual adjustment valve, and a pressure gauge 45 enables controllable refrigeration supply, allowing users to easily monitor nitrogen levels and further enhancing the practicality and adaptability of the device.

Claims

1. A small freezer, characterized in that, The freezer includes a freezer body (1), a hinge seat (2) is provided on the rear top side of the freezer body (1), a freezer sealing cover (3) is hinged to the rear top side of the freezer body (1) through the hinge seat (2), a freezing supply mechanism (4) is provided at the bottom of the freezer body (1), a communication mechanism (5) is provided at the bottom inside the freezer body (1), a storage mechanism (6) is fixedly installed on the rear inside the freezer body (1), a cold air injection mechanism (7) is fixedly installed inside the freezer body (1) outside the storage mechanism (6), the freezer body (1) is connected to the cold air injection mechanism (7) through the communication mechanism (5), and a heat preservation one-way exhaust valve (8) is provided in the middle of the top of the freezer sealing cover (3). The communication mechanism (5) includes a manual press-type high-pressure valve (51) and an elastic press module (52). The manual press-type high-pressure valve (51) is fixedly connected to the middle of the bottom of the freezer body (1). The elastic press module (52) is fixedly connected to one side of the bottom of the freezer body (1). A valve press switch (53) is provided in the middle of one side of the manual press-type high-pressure valve (51). The elastic pressing module (52) includes a side rail frame (521), which is fixedly connected to one side of the bottom of the freezer body (1). A temperature-controlled telescopic spring (522) is fixedly connected inside the side rail frame (521). The temperature-controlled telescopic spring (522) is specifically configured as a binary nickel-titanium alloy spring. A slider (523) is fixedly connected to the outer end of the temperature-controlled telescopic spring (522). A shaft (524) is fixedly connected to the side of the slider (523) away from the temperature-controlled telescopic spring (522). A pressing push plate (525) is fixedly connected to the outer end of the shaft (524) through the side rail frame (521). The input end of the manual press-type high pressure valve (51) is connected to the refrigeration supply mechanism (4), and the output end of the manual press-type high pressure valve (51) is connected to the cold air injection mechanism (7). When the temperature control extension spring (522) is heated and extended, it can push the press plate (525) and the press valve press switch (53) to open the manual press-type high pressure valve (51). The refrigeration supply mechanism (4) includes a tank (41) which is located at the bottom of the freezer body (1). Both sides of the tank (41) are fixedly installed with mounting sleeves (42). A high-pressure nitrogen compressor (43) is installed inside the mounting sleeve (42) by bolts. The output end of the high-pressure nitrogen compressor (43) is provided with a three-way valve (44). Both input ends of the three-way valve (44) are connected to the high-pressure nitrogen compressor (43). The output end of the three-way valve (44) is connected to the input end of a manual press-type high-pressure valve (51).

2. A small freezer according to claim 1, characterized in that, A pressure gauge (45) is fixedly connected to the rear side of the three-way valve (44). The pressure detection end of the pressure gauge (45) is located inside the three-way valve (44). The pressure gauge (45) is used to detect the pressure inside the high-pressure nitrogen compression tank (43). Support feet (9) are fixedly connected to the four corners of the bottom of the freezer body (1). A non-slip base plate (10) with protrusions is fixedly connected to the bottom of the support feet (9). The outer corners of the freezer body (1) and the freezer sealing cover (3) are all set to be arc-shaped.

3. A small freezer according to claim 2, characterized in that, The storage mechanism (6) includes a slide (61), a moving module (62) and a supporting module (63). The slide (61) is located in the middle of the rear side of the freezer body (1). The moving module (62) is installed inside the slide (61). The supporting module (63) is fixedly connected to the moving end of the moving module (62). The moving module (62) includes a low-temperature resistant motor (621) and a lead screw (622). The low-temperature resistant motor (621) is installed at the bottom of the slide groove (61) by screws. The lead screw (622) is rotatably connected to the inside of the slide groove (61). The output end of the low-temperature resistant motor (621) is connected to the bottom of the lead screw (622) through a coupling. A sliding block (623) is threaded on the outer surface of the lead screw (622). The sliding block (623) is slidably connected to the inside of the slide groove (61). The bearing module (63) is fixedly connected to the front of the sliding block (623).

4. A small freezer according to claim 3, characterized in that, The load-bearing module (63) includes a connecting arm (631), which is fixedly connected to the side of the sliding block (623) away from the slide groove (61). The outer end of the connecting arm (631) is fitted with a load-bearing base plate (632) by screws. The top of the load-bearing base plate (632) is fixedly connected with a load-bearing mesh cabinet (633). The interior of the load-bearing mesh cabinet (633) is fixedly connected with load-bearing grid plates (634) arranged linearly at equal intervals.

5. A small freezer according to claim 4, characterized in that, Side base plates (635) are fixedly installed at the four corners of the bearing base plate (632), and side bearing mesh boxes (636) are fixedly installed on the top of the side base plates (635). Bearing partition plates (637) are fixedly connected to the inner side of the side bearing mesh boxes (636) in a linear arrangement at equal intervals.

6. A small freezer according to claim 5, characterized in that, The cold air injection mechanism (7) includes a rotary joint (71) and an annular rail (72). The rotary joint (71) is rotatably connected to the top of the valve push switch (53). The annular rail (72) is fixedly connected to the upper interior of the freezer body (1). Adjustable limit groups (73) are movably connected at equal intervals inside the annular rail (72). Cold air exhaust pipes (74) are fixedly connected to the inner sides of the adjustable limit groups (73). The cold air exhaust pipes (74) and the annular rail (72) are connected to each other. 72) The cold air exhaust pipe (74) is located between the inner sides of the side support net box (636) and the support net cabinet (633). Cold air nozzles (75) are fixedly connected to the two sides of the side support net box (636) and the support net cabinet (633) in a linear arrangement with equal spacing. High pressure hoses (76) are fixedly connected to the outer side of the rotary joint (71) in a ring arrangement with equal spacing. The output end of the high pressure hose (76) is connected to the bottom end of each cold air exhaust pipe (74).

7. A small freezer according to claim 6, characterized in that, The adjustable limiting assembly (73) includes a movable block (731) and a limiting hole (733). The movable block (731) is slidably connected to the inside of the annular rail (72). A limiting arm (732) is fixedly connected to the inner side of the movable block (731). A top rail frame (734) is fixedly connected to the top of the limiting arm (732). A limiting spring (735) is fixedly connected to the inner side of the top rail frame (734). A displacement block (736) is fixedly connected to the top of the limiting spring (735). The top of the displacement block (736) is... A through shaft (737) is fixedly connected. The top end of the through shaft (737) passes through the top rail frame (734) and is fixedly connected to a limiting plate (738). A retaining shaft (739) is fixedly connected to the bottom end of the limiting plate (738) away from the through shaft (737). The limiting holes (733) are arranged in a ring at equal intervals on the top of the ring rail (72). The end of the retaining shaft (739) is inserted into the corresponding limiting hole (733). An adjusting pull ring (7310) is fixedly connected to the top of the limiting plate (738).

8. A motorhome, characterized in that, Includes the small freezer as described in any one of claims 1-7.

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