Energy-saving alternating-current and direct-current universal refrigerator
By adopting a spiral evaporator and a combined heat exchange basket structure in the refrigerator, combined with the rectifier and AC and DC interfaces, the problems of power supply limitations and uneven temperature distribution of traditional refrigerators are solved, and more efficient refrigeration effect is achieved and a wider range of applicable scenarios.
Patent Information
- Application Number
- CN202411518150.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2024-12-13
AI Technical Summary
Traditional refrigerators have limitations in power supply methods, with slow cooling speed and uneven temperature distribution. Especially when horizontal refrigerators accumulate items, the cooling effect is reduced, resulting in an increase in energy consumption.
An energy-saving AC and DC universal refrigerator is designed, adopting a spiral evaporator and a combined heat exchange basket structure, combining rectifier and AC and DC interfaces to improve the refrigeration speed and temperature uniformity, and safe sealing of refrigerant through a combined joint .
It realizes multi-directional heat exchange of the refrigerator, improves the cooling speed and temperature uniformity, expands applicable scenarios, and improves operational convenience and safety through a combined structure.
Smart Images
Figure CN119123723A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of refrigerator structures, and more particularly to an energy-saving AC / DC universal refrigerator. Background Art
[0002] A freezer is a refrigeration device used to preserve food and other items at low temperatures. It generally consists of three parts: a cabinet, a refrigeration system, and an electrical system. The cabinet is used to hold food and other items and has certain thermal insulation properties; the refrigeration system consists of four basic components: a compressor, a condenser, a capillary tube (or a thermal expansion valve), and an evaporator, which are responsible for lowering the temperature inside the cabinet; the electrical system provides power and controls the operation of the refrigeration system.
[0003] Traditional refrigerator compressors are mostly powered by a single power source, such as DC or AC. This power supply method has certain limitations in energy efficiency, stability and applicable scenarios. In addition, during the refrigeration process of the refrigerator, problems such as slow refrigeration speed and uneven temperature distribution will be encountered. Especially for horizontal refrigerators, the cooling effect of items stacked to the top is reduced. In order to meet the established refrigeration effect, more energy costs are required. Summary of the invention
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an energy-saving AC / DC universal refrigerator to solve the limitation that the traditional refrigerator in the above-mentioned background technology cannot be used for both AC and DC power supply, as well as the problem of uneven cooling speed and temperature distribution.
[0005] The present invention provides the following technical solution: an energy-saving AC / DC universal refrigerator, comprising a cabinet, a base is provided at the bottom of the cabinet, an accessory room is provided inside the base, a refrigeration system, a power distribution system and a control system are provided in the accessory room, the refrigeration system is composed of a compressor, a DC fan, a condenser, a capillary tube and an evaporator, a guard plate for sealing the accessory room is installed on one side of the base, a power connection for connecting the power distribution system is installed on one side of the guard plate, the power connection is composed of an AC interface and a DC interface, a rectifier is installed in the accessory room, the AC The interface is electrically connected to the power distribution system through a rectifier, and the DC interface is electrically connected to the power distribution system; a protective wall is fixedly connected to the inner wall of the cabinet, the evaporator is arranged at the interlayer between the cabinet and the protective wall, and is spirally distributed along the side wall of the protective wall, and the spiral pitch decreases from low to high, and the shape and position arrangement of the protective wall are used to improve the refrigeration speed and temperature distribution uniformity inside the cabinet; a number of heat exchange baskets are arranged inside the cabinet, and a number of the heat exchange baskets are connected to the inside of the evaporator, and the heat exchange baskets are used for classifying items, balancing the temperature inside the cabinet and improving the refrigeration speed.
[0006] Furthermore, the axial cross-section of the evaporator is D-shaped, and its vertical plane is in contact with the side of the protective wall.
[0007] Furthermore, the bottom interface of the evaporator is connected to the capillary tube through refrigerant tube 1, and the top interface of the evaporator is connected to the compressor through refrigerant tube 2.
[0008] Furthermore, the heat exchange basket includes a tubular main basket and two box plates located on the front and back of the tubular main basket, the two tubular main baskets are provided with supporting card plates on the front and back sides, the two box plate side walls are fixedly connected with load-bearing groove rails adapted to the supporting card plates, a refrigerant inlet pipe is installed inside one of the box plates, and a refrigerant discharge pipe is installed inside the other box plate, the bottom ends of the refrigerant inlet pipe and the refrigerant discharge pipe are connected to the inside of the evaporator, and the refrigerant inlet pipe and the refrigerant discharge pipe are provided with one-way valves, and nozzles are provided on the front and back sides of the box plates, and the other ends of the refrigerant inlet pipe and the refrigerant discharge pipe are respectively connected to the two nozzles of the tubular main basket through two combined joints.
[0009] Furthermore, the combined joint is composed of: a movable sub-joint and a fixed female joint, the movable sub-joint is fixedly connected to the outer wall of the box plate and penetrates into the interior of the box plate, and the fixed female joint is connected to the nozzle of the tubular main basket; the movable sub-joint includes a fixed tube, a nut is threadedly sleeved on the side wall of the fixed tube, a fixed shell is fixedly connected to the side wall of the nut, one end of the fixed shell is connected to an output pipe head, and the side wall of the output pipe head is provided with a thread; the fixed female joint includes a sleeve shell, and the two ends of the sleeve shell are respectively provided with a through hole 1 and a through hole 2 that are connected to each other, the diameter of the through hole 1 is larger than the diameter of the through hole 2, a thread groove is provided on one side wall of the through hole, and a sealing ring is provided at the end of the thread groove.
[0010] Furthermore, an inner wall of the fixed tube is fixedly connected to one end of the fixed shell, the inner cavity a of the output tube head is set at an eccentric position, and a solid structure with a size larger than the inner tube is set on the central axis.
[0011] Furthermore, one end of the side wall of the fixed tube is located inside the fixed shell and is fixedly connected with a positioning ring plate, and the positioning ring plate is used to prevent the fixed shell from falling off and to improve the sealing performance between the fixed shell and the fixed tube.
[0012] Furthermore, an opening and closing window communicating with the base accessory chamber is provided at the bottom of the inner wall of the cabinet, the DC fan is provided between the compressor and the condenser, the opening and closing window is provided at the top of the compressor, the condenser is located in the air outlet direction of the DC fan, and a temperature sensor is installed in the base accessory chamber.
[0013] Furthermore, the opening and closing window includes: an electric cylinder and a top plate frame plate, wherein the frame plate is used to connect the cabinet and the internal space of the base accessory room, the electric cylinder is installed at the bottom of the cabinet, and the output end of the electric cylinder passes through the interior of the cabinet and is connected to the top plate, and the top plate is arranged on the top of the frame plate.
[0014] Furthermore, a plurality of movable rods are fixedly connected to the four sides of the bottom of the top plate, and axial holes are provided at the bottom of the inner wall of the cabinet and at the positions corresponding to the plurality of movable rods. The plurality of movable rods are slidably sleeved in the plurality of axial holes respectively, and the top of the frame plate protrudes more than one centimeter from the inner wall of the cabinet.
[0015] Technical effects and advantages of the present invention: The present invention improves the evaporator structure on the basis of the traditional refrigerator refrigeration system. Through the shape and arrangement of the evaporator, multi-directional heat exchange inside the refrigerator is realized, the heat exchange area is increased to improve the refrigeration speed of the refrigerator, and the temperature uniformity inside the refrigerator is improved. In addition, the power distribution system is provided with a rectifier, an AC interface, and a DC interface, so that the refrigerator can realize the common use of DC and AC power, thereby improving the applicable scene range of the refrigerator. On the basis of the above, a number of heat exchange baskets are also provided and connected to the evaporator, which not only realizes the classification of the storage items in the refrigerator, but also further increases the heat exchange area of the refrigerated items and improves the refrigeration efficiency of the refrigerator. In addition, since the heat exchange baskets span the internal space of the cabinet, the defect of poor refrigeration effect in the central space of the refrigerator, i.e., the position far away from the evaporator, is compensated, and the temperature distribution uniformity of the refrigerator is further improved. In addition, the heat exchange basket is set as a modular structure, and the modular connection between the tubular main basket and the evaporator is mainly realized through the modular joint, so that the heat exchange basket can be assembled or disassembled according to actual storage needs. And through the structural design of the modular joint, the evaporator interface can be automatically sealed when the heat exchange basket is disassembled, avoiding refrigerant leakage and improving operational convenience and safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an exploded schematic diagram of the overall structure of the present invention; Figure 3 For the present invention Figure 2 The schematic diagram of the disassembly of the base structure from the side view; Figure 4 For the present invention Figure 2 Schematic diagram of the cabinet, protective wall and evaporator cross-section structure; Figure 5 For the present invention Figure 2 Schematic diagram of the heat exchange basket structure; Figure 6 For the present invention Figure 5 Schematic diagram of the combined joint structure; Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure of the movable sub-joint and the fixed female joint; Figure 8 For the present invention Figure 3 Schematic diagram of the cabinet and opening and closing window section structure; Fig. 9 For the present invention Figure 3 Schematic diagram of the opening and closing window structure.
[0017] The accompanying drawings are marked as follows: 1, cabinet; 2, base; 3, refrigeration system; 4, protective wall; 5, control system; 6, power connection; 7, heat exchange basket; 8, temperature sensor; 9, opening and closing window; 10, rectifier; 21, guard plate; 31, compressor; 32, DC fan; 33, condenser; 34, evaporator; 35, refrigerant pipe 1; 36, refrigerant pipe 2; 61, AC interface; 62, DC interface; 71, box plate; 72, tubular main basket ; 73. Support card plate; 74. Load-bearing groove rail; 75. Refrigerant inlet pipe; 76. Refrigerant outlet pipe; 77. Combined joint; 771. Movable sub-joint; 772. Fixed female joint; 773. Fixed pipe; 774. Nut; 775. Fixed shell; 776. Output pipe head; 777. Built-in pipe; 778. Positioning ring plate; 779. Shell; 7710. Sealing ring; 91. Electric cylinder; 92. Top plate; 93. Frame plate; 94. Moving rod. DETAILED DESCRIPTION
[0018] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.
[0019] Reference Figure 1-Figure 3 The present invention provides an energy-saving AC / DC universal refrigerator, including a cabinet 1, a base 2 is arranged at the bottom of the cabinet 1, an accessory room is arranged inside the base 2, a refrigeration system 3, a power distribution system and a control system 5 are arranged in the accessory room, the refrigeration system 3 is composed of a compressor 31, a DC fan 32, a condenser 33, a capillary tube, and an evaporator 34, a protective plate 21 for sealing the accessory room is installed on one side of the base 2, a power connection 6 for connecting the power distribution system is installed on one side of the protective plate 21, and the power connection 6 is composed of an AC interface 61 and a DC interface 62, a rectifier 10 is installed in the accessory room, and an AC The interface 61 is electrically connected to the power distribution system through the rectifier 10, and the DC interface 62 is electrically connected to the power distribution system; a protective wall 4 is fixedly connected to the inner wall of the cabinet 1, and the evaporator 34 is arranged at the interlayer between the cabinet 1 and the protective wall 4, and is spirally distributed along the side wall of the protective wall 4, and the spiral pitch decreases from low to high. The shape and position arrangement of the protective wall 4 are used to improve the refrigeration speed and temperature distribution uniformity inside the cabinet 1; a plurality of heat exchange baskets 7 are arranged inside the cabinet 1, and the plurality of heat exchange baskets 7 are connected to the inside of the evaporator 34. The heat exchange baskets 7 are used for classifying items, balancing the temperature inside the cabinet 1 and improving the refrigeration speed.
[0020] The refrigerator is provided with an AC interface 61 and a DC interface 62 for connecting a DC power supply to an AC power supply, wherein the AC power output by the AC interface 61 is converted into DC power by a rectifier 10 and connected to a power distribution system, while the DC power output by the DC interface 62 is directly connected to a power distribution system, thereby achieving the AC / DC universal effect of the refrigerator; when the refrigeration system 3 is running, the evaporator 34 absorbs heat to cool the inside of the cabinet 1, and the spiral setting of the evaporator 34 can convert the refrigeration direction inside the cabinet 1 from the single direction of a traditional refrigerator to multi-directional refrigeration, thereby improving the heat exchange efficiency and the refrigeration speed, and the spiral pitch setting of the protective wall 4, that is, the density of the upper part of the spiral turns is greater than the density of the lower part, so that the heat exchange area at the upper position inside the cabinet 1 is larger and the refrigeration efficiency is improved. The effect is better. After the refrigeration system 3 is running, cold air is first generated by the upper space inside the cabinet 1, so that the temperature of the upper space inside the cabinet 1 is lower than that of the lower space. Due to the difference in the density of cold air and hot air, the cold air in the upper part of the cabinet 1 gradually sinks, thereby improving the temperature uniformity inside the cabinet 1; in addition, the heat exchange basket 7 is connected to the evaporator 34. When the refrigerant flows through the evaporator 34, it is diverted to the inside of the heat exchange basket 7, so that the heat exchange basket 7 has a heat absorption effect on the stored items, thereby further increasing the heat exchange area inside the cabinet 1 and increasing the refrigeration speed. In addition, the heat exchange basket 7 allows the middle position of the internal space of the cabinet 1 to participate in the heat exchange. Compared with traditional refrigerators, the refrigeration effect is transferred from the edge of the space to the middle, which can further improve the temperature uniformity of the internal space of the cabinet 1.
[0021] Reference Figure 4 The axial cross section of the evaporator 34 is D-shaped, and its vertical plane is in contact with the side of the protective wall 4.
[0022] The D-shaped cross-section of the protective wall 4 can increase the contact area between the evaporator 34 and the protective wall 4, thereby further improving the heat exchange effect of the evaporator 34 and increasing the refrigeration efficiency inside the cabinet 1.
[0023] Reference Figure 2 , 3 The bottom interface of the evaporator 34 is connected to the capillary tube through the refrigerant tube 1 35 , and the top interface of the evaporator 34 is connected to the compressor 31 through the refrigerant tube 2 36 .
[0024] The refrigerant flow path inside the evaporator 34 is from bottom to top. Due to the spiral gap setting of the evaporator 34, the number of thread turns at the lower part of the evaporator 34 is relatively sparse, and the number of thread turns at the upper part is relatively dense. The refrigerant continuously absorbs heat inside the evaporator 34. The loss of heat exchange effect at the lower part of the evaporator 34 can be avoided by using the refrigerant path from bottom to top.
[0025] Reference Figure 5The heat exchange basket 7 includes a tubular main basket 72 and two box plates 71 located on the front and back of the tubular main basket 72. Support card plates 73 are provided on the front and back of the two tubular main baskets 72. The side walls of the two box plates 71 are fixedly connected with load-bearing groove rails 74 adapted to the support card plates 73. A refrigerant inlet pipe 75 is installed inside one box plate 71, and a refrigerant discharge pipe 76 is installed inside the other box plate 71. The bottom ends of the refrigerant inlet pipe 75 and the refrigerant discharge pipe 76 are connected to the inside of the evaporator 34. Check valves are provided inside the refrigerant inlet pipe 75 and the refrigerant discharge pipe 76. Nozzles are provided on the front and back of the box plates 71. The other ends of the refrigerant inlet pipe 75 and the refrigerant discharge pipe 76 are respectively connected to the two nozzles of the tubular main basket 72 through two combined joints 77.
[0026] By setting the heat exchange basket 7 as a modular type, the refrigerator can be used for larger items, and part of the heat exchange basket 7 can be flexibly disassembled, thereby improving the convenience of using the device; when working, the refrigerant enters the evaporator 34 and is diverted to the refrigerant access pipe 75. The refrigerant output by the refrigerant access pipe 75 enters the tubular main basket 72 through the modular joint 77 and circulates, and heat is exchanged with the stored items through the tubular main basket 72. The refrigerant in the tubular main basket 72 enters the refrigerant discharge pipe 76 through another modular joint 77, and the refrigerant is merged into the evaporator 34 through the refrigerant discharge pipe 76.
[0027] Reference Figure 6 , 7 The combined joint 77 is composed of a movable sub-joint 771 and a fixed female joint 772. The movable sub-joint 771 is fixedly connected to the outer wall of the box plate 71 and penetrates into the interior of the box plate 71. The fixed female joint 772 is connected to the nozzle of the tubular main basket 72. The movable sub-joint 771 includes a fixed tube 773. A nut 774 is threadedly sleeved on the side wall of the fixed tube 773. A fixed shell 775 is fixedly connected to the side wall of the nut 774. One end of the fixed shell 775 is connected to an output pipe head 776. The side wall of the output pipe head 776 is provided with a thread. The fixed female joint 772 includes a sleeve shell 779. The sleeve shell 779 has a through hole 1 and a through hole 2 connected to each other at both ends. The diameter of the through hole 1 is larger than that of the through hole 2. A thread groove is provided on one side wall of the through hole. A sealing ring 7710 is provided at the end of the thread groove.
[0028] By rotating the fixed shell 775, the nut 774 is driven to rotate, and the nut 774 is displaced through the threaded matching relationship with the fixed tube 773. At this time, the fixed shell 775 drives the output tube head 776 to move toward the sleeve shell 779 until the output tube head 776 enters a through hole of the sleeve shell 779. Since the output tube head 776 rotates with the fixed shell 775, the output tube head 776 is combined with the internal thread of the through hole of the sleeve shell 779. At this time, the modular joint 77 completes the combination relationship, and the refrigerant can flow through the fixed tube 773, the fixed shell 775, the output tube head 776, and the sleeve shell 779.
[0029] Reference Figure 7 The inner wall of the fixed tube 773 is fixedly connected to one end of the fixed shell 775 with the built-in tube 777. The inner cavity a of the output tube head 776 is set to an eccentric position, and a solid structure with a size larger than the built-in tube 777 is set on the central axis.
[0030] By rotating the fixed shell 775 to drive the output tube head 776 to detach from the inside of the sleeve shell 779, so that the movable sub-joint 771 is disconnected from the fixed female joint 772, the output tube head 776 approaches the inner tube 777 until the movable sub-joint 771 is disconnected from the fixed female joint 772 and the inner tube 777 rests on the solid structure in the center of the output tube head 776. At this time, the output tube head 776 blocks the inner tube 777, so that the movable sub-joint 771 automatically forms a blocking effect after the movable sub-joint 771 is disconnected from the fixed female joint 772, thereby avoiding refrigerant leakage in the evaporator 34 after the heat exchange basket 7 is disassembled.
[0031] Reference Figure 7 One end of the side wall of the fixed tube 773 is located inside the fixed shell 775 and is fixedly connected with a positioning ring plate 778. The positioning ring plate 778 is used to prevent the fixed shell 775 from falling off and to improve the sealing performance between the fixed shell 775 and the fixed tube 773.
[0032] When the movable sub-joint 771 is connected to the fixed female joint 772, the nut 774 moves to the end position on the side wall of the fixed tube 773, and the nut 774 fits tightly with the fixed shell 775 to enhance the sealing effect between the fixed shell 775 and the nut 774.
[0033] Reference Figure 3 An opening and closing window 9 communicating with the accessory chamber of the base 2 is provided at the bottom of the inner wall of the cabinet 1. The DC fan 32 is provided between the compressor 31 and the condenser 33. The opening and closing window 9 is provided at the top of the compressor 31. The condenser 33 is located in the air outlet direction of the DC fan 32. A temperature sensor 8 is installed in the accessory chamber of the base 2.
[0034] The temperature in the accessory room can be detected by the temperature sensor 8. When the temperature is too high, the opening window 9 is controlled to open, and a circulating airflow is formed when the DC fan 32 is running. At this time, the cold air inside the cabinet 1 can enter the accessory room through the opening window 9, first forming a cooling effect on the compressor 31, and then the DC fan 32 is used to blow the cold air to the condenser 33 for auxiliary cooling, thereby improving the performance of the refrigerator refrigeration system 3.
[0035] Reference Figure 8The opening and closing window 9 includes: an electric cylinder 91, a top plate 92, and a frame plate 93. The frame plate 93 is used to connect the cabinet 1 and the internal space of the accessory room of the base 2. The electric cylinder 91 is installed at the bottom of the cabinet 1. The output end of the electric cylinder 91 passes through the interior of the cabinet 1 and is connected to the top plate 92. The top plate 92 is arranged on the top of the frame plate 93.
[0036] When the control electric cylinder 91 contracts to move the top plate 92 downward to cover the top of the frame plate 93, the opening and closing window 9 is in a closed state. Conversely, the electric cylinder 91 lifts the top plate 92, and the opening and closing window 9 is in an open state. The cold air holes inside the cabinet 1 enter the accessory room of the base 2 through the gap between the top plate 92 and the frame plate 93.
[0037] Reference Fig. 9 A plurality of moving rods 94 are fixedly connected to the four sides of the bottom of the top plate 92. Axial holes are provided at the bottom of the inner wall of the cabinet 1 corresponding to the plurality of moving rods 94. The plurality of moving rods 94 are slidably sleeved in the plurality of axial holes respectively. The top of the frame plate 93 protrudes from the inner wall of the cabinet 1 by more than one centimeter.
[0038] When the top plate 92 is lifted up, a barrier can be formed around the frame plate 93 by a plurality of movable rods 94, thereby preventing items inside the cabinet 1 from falling through the frame plate 93 when the retractable window 9 is opened. By setting the top of the frame plate 93 to a raised state, moisture inside the cabinet 1 can be prevented from flowing out of the frame plate 93.
[0039] The above shows and describes the basic principles, main features and advantages of the present invention. The present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An energy-saving AC / DC universal refrigerator, comprising a cabinet body (1), a base (2) being arranged at the bottom of the cabinet body (1), an accessory room being arranged inside the base (2), a refrigeration system (3), a power distribution system and a control system (5) being arranged in the accessory room, the refrigeration system (3) being composed of a compressor (31), a DC fan (32), a condenser (33), a capillary tube and an evaporator (34), and characterized in that: A guard plate (21) for sealing the accessory chamber is mounted on one side of the base (2); a power connection (6) for connecting the power distribution system is mounted on one side of the guard plate (21); the power connection (6) is composed of an AC interface (61) and a DC interface (62); a rectifier (10) is mounted in the accessory chamber; the AC interface (61) is electrically connected to the power distribution system via the rectifier (10); and the DC interface (62) is electrically connected to the power distribution system; The inner wall of the cabinet (1) is fixedly connected to a protective wall (4); the evaporator (34) is arranged at the interlayer between the cabinet (1) and the protective wall (4) and is distributed in a spiral along the side wall of the protective wall (4), and the spiral pitch decreases from low to high; the shape and position arrangement of the protective wall (4) are used to improve the refrigeration speed and temperature distribution uniformity inside the cabinet (1); A plurality of heat exchange baskets (7) are arranged inside the cabinet (1); the plurality of heat exchange baskets (7) are connected to the inside of the evaporator (34); the heat exchange baskets (7) are used to classify items, balance the temperature inside the cabinet (1) and increase the refrigeration speed.
2. The energy-saving AC / DC universal refrigerator according to claim 1, characterized in that: The evaporator (34) has an axial cross-section that is D-shaped, and a vertical plane thereof is in contact with the side of the protective wall (4).
3. The energy-saving AC / DC universal refrigerator according to claim 1, characterized in that: The bottom interface of the evaporator (34) is connected to the capillary tube via a first refrigerant tube (35), and the top interface of the evaporator (34) is connected to the compressor (31) via a second refrigerant tube (36).
4. The energy-saving AC / DC universal refrigerator according to claim 1, characterized in that: The heat exchange basket (7) comprises a tubular main basket (72) and two box plates (71) located on the front and back of the tubular main basket (72); the front and back of the two tubular main baskets (72) are both provided with support card plates (73); the side walls of the two box plates (71) are fixedly connected with load-bearing groove rails (74) adapted to the support card plates (73); one of the box plates (71) is internally installed with a refrigerant access pipe (75); and the other box plate (71) is internally installed with a refrigerant access pipe (75). A refrigerant discharge pipe (76) is provided. The bottom ends of the refrigerant inlet pipe (75) and the refrigerant discharge pipe (76) are connected to the inside of the evaporator (34). Both the refrigerant inlet pipe (75) and the refrigerant discharge pipe (76) are provided with a one-way valve. Both the front and back sides of the box plate (71) are provided with nozzles. The other ends of the refrigerant inlet pipe (75) and the refrigerant discharge pipe (76) are respectively connected to the two nozzles of the tubular main basket (72) through two combined joints (77).
5. The energy-saving AC / DC universal refrigerator according to claim 4, characterized in that: The combined joint (77) is composed of a movable sub-joint (771) and a fixed female joint (772); the movable sub-joint (771) is fixedly connected to the outer wall of the box plate (71) and penetrates into the interior of the box plate (71); and the fixed female joint (772) is connected to the nozzle of the tubular main basket (72); The movable sub-joint (771) comprises a fixed tube (773), a nut (774) being threadedly sleeved on the side wall of the fixed tube (773), a fixed shell (775) being fixedly connected to the side wall of the nut (774), one end of the fixed shell (775) being connected to an output pipe head (776), and a thread being arranged on the side wall of the output pipe head (776); The fixed female joint (772) comprises a sleeve (779), and the sleeve (779) has two ends respectively provided with a through hole 1 and a through hole 2 which are interconnected, the diameter of the through hole 1 being larger than the diameter of the through hole 2, a thread groove being provided on one side wall of the through hole, and a sealing ring (7710) being provided at the end of the thread groove.
6. The energy-saving AC / DC universal refrigerator according to claim 5, characterized in that: An inner wall of the fixed tube (773) is fixedly connected to one end of the fixed shell (775) with an internal tube (777), an inner cavity a of the output tube head (776) is arranged at an eccentric position, and a solid structure having a size larger than that of the internal tube (777) is arranged on the central axis.
7. The energy-saving AC / DC universal refrigerator according to claim 5, characterized in that: One end of the side wall of the fixed tube (773) is located inside the fixed shell (775) and is fixedly connected to a positioning ring plate (778), wherein the positioning ring plate (778) is used to prevent the fixed shell (775) from falling off and to improve the sealing performance between the fixed shell (775) and the fixed tube (773).
8. The energy-saving AC / DC universal refrigerator according to claim 1, characterized in that: An openable window (9) communicating with the accessory chamber of the base (2) is provided at the bottom of the inner wall of the cabinet (1); the DC fan (32) is provided between the compressor (31) and the condenser (33); the openable window (9) is provided at the top of the compressor (31); the condenser (33) is located in the air outlet direction of the DC fan (32); and a temperature sensor (8) is installed in the accessory chamber of the base (2).
9. The energy-saving AC / DC universal refrigerator according to claim 8, characterized in that: The retractable window (9) comprises: an electric cylinder (91), a top plate (92) and a frame plate (93); the frame plate (93) is used to connect the cabinet (1) with the interior space of the accessory room of the base (2); the electric cylinder (91) is installed at the bottom of the cabinet (1); the output end of the electric cylinder (91) passes through the interior of the cabinet (1) and is connected to the top plate (92); the top plate (92) is arranged on the top of the frame plate (93).
10. The energy-saving AC / DC universal refrigerator according to claim 9, characterized in that: A plurality of movable rods (94) are fixedly connected to the four sides of the bottom of the top plate (92), and shaft holes are provided at the bottom of the inner wall of the cabinet (1) corresponding to the plurality of movable rods (94), and the plurality of movable rods (94) are slidably sleeved in the plurality of shaft holes respectively, and the top of the frame plate (93) protrudes from the inner wall of the cabinet (1) by more than one centimeter.