Cold operation device for a refrigerator and method thereof

Abstract

This invention relates to the field of cold-keeping operation technology, specifically to a cold-keeping operation device and method for a refrigerator, comprising: a refrigerator and a temperature difference liquid control mechanism. The refrigerator has a liquid storage tank at its inner bottom. A liquid injection channel is located on one side of the liquid storage tank in the temperature difference liquid control mechanism. An inlet channel is formed on the inner wall of the liquid injection channel, and one end of the liquid injection channel is connected to a cold air pipe. This invention, through the cooperation of the cold air pipe, Stirling engine, piston two, inlet channel, outlet channel, and expansion valve, ensures increased cold-keeping time after the refrigerator is powered off. The temperature difference and Stirling principle cause the Stirling engine to drive piston two to repeatedly move up and down within the inlet channel, continuously controlling liquid flow and increasing the heat resistance of the rear of the refrigerator. Simultaneously, when the liquid passes through the expansion valve into the refrigerator compartment and freezer compartment, cold air is released, further increasing the refrigerator's cold-keeping time.

Description

Technical Field

[0001] This invention relates to the field of cold-keeping operation technology, and more specifically to a cold-keeping operation device and method for a refrigerator. Background Technology

[0002] Cold-keeping operation refers to the core operating mechanism that uses mechanical, physical, or electronic means to continuously maintain a low-temperature environment inside the refrigerator, prevent external heat from intruding, and inhibit the release of heat from the food inside, thereby achieving food preservation and extending the storage period. It generally maintains the internal low-temperature balance through the synergistic effect of heat transfer and heat insulation.

[0003] Currently, when moving or experiencing a power outage, refrigerators often lose power. In such cases, the refrigerator cannot continue to cool, causing the temperature inside to match the outside temperature, which accelerates food spoilage. If this occurs during hot summer weather (30 to 40 degrees Celsius), the refrigerator's heat resistance will decrease after a power outage. Therefore, this invention provides a device and method for maintaining the cooling operation of a refrigerator. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of poor cold retention in refrigerators after power outages.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cold-keeping operation device and method for a refrigerator, comprising: a refrigerator and a temperature difference liquid control mechanism, wherein a liquid storage tank is provided at the bottom of the refrigerator, a liquid injection channel is provided on one side of the liquid storage tank in the temperature difference liquid control mechanism, an inlet channel is provided on the inner wall of the liquid injection channel, one end of the liquid injection channel is connected to a cold air pipe, a Stirling engine is sleeved on the outer wall of the cold air pipe in the temperature difference liquid control mechanism, a piston two that can move up and down is provided at the top of the Stirling engine, the piston two is airtightly slidably connected to the inner wall of the inlet channel, and the piston two can drive hydraulic flow in the inlet channel;

[0006] One end of the liquid inlet channel is connected to a liquid outlet channel, which is composed of multiple corner tubes connected vertically, and an expansion valve is fixedly installed on the inner wall of the liquid outlet channel.

[0007] When the refrigerator is powered on and cooling is in operation, the liquid in the storage tank can be stored and cooled.

[0008] In a preferred embodiment, the inner walls of the refrigerator are provided with a refrigerator compartment and a freezer compartment. The refrigerator compartment is located directly above the freezer compartment. Four extension members are fixedly installed on the inner top of the freezer compartment. Ropes are slidably connected to the inner walls of the extension members. A door panel is fixedly installed at one end of the rope. One side of the door panel is rotatably connected to one side of the refrigerator.

[0009] A liquid injection tank is provided between the freezing chamber and the liquid storage tank, and the liquid injection tank is threadedly connected with a threaded cap.

[0010] The refrigerator has a temperature channel on its rear side, the Stirling engine is located in the temperature channel, the inner wall of the temperature channel can be fitted with a heat insulation baffle, and the side of the heat insulation baffle away from the temperature channel has an arc-shaped groove.

[0011] In a preferred embodiment, the inner wall of the injection channel is airtightly rotatably connected to a heat insulation plate. A rotating rod is fixedly installed on one side of the heat insulation plate, and a baffle plate is fixedly installed on the other end of the rotating rod. A rectangular rod is fixedly installed on the other side of the baffle plate. An n-shaped rod is slidably connected through one side of the rectangular rod. A snap-fit ​​groove is provided on the rear side of the refrigerator, and one side of the n-shaped rod can be inserted into the inner wall of the snap-fit ​​groove.

[0012] In a preferred embodiment, a copper ring is fixedly installed on the outer wall of the air cooling pipe, the Stirling engine can be snapped between the air cooling pipe and the copper ring, and a connecting rod is slidably connected to the top of the Stirling engine, the top of the connecting rod being fixedly installed at the bottom of the piston.

[0013] One-way valve three and one-way valve four are fixedly installed on the inner wall of the liquid inlet channel. The piston two moves up and down by hydraulically driving one-way valve three and one-way valve four to control the liquid flow.

[0014] In a preferred embodiment, the liquid storage tank has an inlet groove 1 at its inner top. A one-way valve 5 is fixedly installed on the inner wall of the inlet groove 1. The other end of the inlet groove 1 is connected to a collection groove 1. The collection groove 1 is located at the inner bottom of the freezer compartment. A vertical pipe is connected to the inner bottom of the freezer compartment. A liquid passage pipe is connected to the bottom end of the vertical pipe. Multiple liquid passage grooves are arranged in a circular array on the outer wall of the liquid passage pipe near its bottom end. A one-way valve 6 is fixedly installed on the inner wall of the liquid storage tank. A fixing ring is fixedly installed on the inner wall of the vertical pipe. A spring 1 is fixedly installed at the bottom of the fixing ring. A piston 1 is fixedly installed at the bottom end of the spring 1. A telescopic rod and a rope are fixedly installed on the top of the piston 1. The rope extends above the fixing ring, passes through the rope, and is slidably connected to the outer wall of the vertical pipe.

[0015] In a preferred embodiment, a one-way valve is fixedly installed at the bottom of the piston, the one-way valve is connected to the telescopic rod, and a one-way valve is connected to the top of the telescopic rod.

[0016] A horizontal pipe is fixedly installed at the top of the vertical pipe. Multiple spray nozzles are connected to the outer wall of the horizontal pipe in a linear array. The liquid outlet ends of the multiple spray nozzles are inclined toward the rear inner wall of the freezing chamber. The inner wall of the horizontal pipe is fixedly installed on the outer wall of the one-way valve.

[0017] In a preferred embodiment, the inner wall of the refrigerator compartment is provided with a liquid collection tank, and the bottom of the refrigerator compartment is provided with a liquid inlet tank, which is connected to the top of the freezer compartment. The liquid inlet tank and the liquid collection tank are interconnected. A blocking ball is airtightly rotatably connected to the inner wall of the liquid inlet tank. The outer walls of the two blocking balls are provided with slots, and a rotating rod is fixedly installed on the outer walls of the two blocking balls. The outer wall of the rotating rod passes through and is airtightly rotatably connected to one side of the refrigerator.

[0018] In addition, the present invention provides a method for maintaining the cold operation of a refrigerator, comprising the following steps:

[0019] S1. When the refrigerator is powered off, first remove the heat insulation baffle through the arc groove so that the outside hot air can fully contact the copper ring and Stirling engine. Drive the connecting rod to move in a cycle by Stirling cycle principle. At the same time, cooperate with one-way valve three and one-way valve four to control the liquid flow from the liquid storage tank into the liquid draining channel. The liquid in the liquid draining channel can absorb the heat at the back of the refrigerator.

[0020] S2. After the liquid in piston two passes through the expansion valve, it is transformed into a mixture of cold liquid and cold gas and enters the refrigerator compartment. At the same time, the inner wall of liquid inlet tank two is opened to connect the refrigerator compartment and the freezer compartment, so that the mixture can absorb heat from the refrigerator compartment and the freezer compartment.

[0021] S3. Whenever the door panel is opened, pulling the rope can drive the liquid in the storage tank to adhere to the inner rear side of the storage tank through the spray nozzle and absorb the heat from the outside.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0023] I. This invention utilizes the coordination between the cold air pipe, Stirling engine, piston II, liquid inlet channel, liquid outlet channel, and expansion valve. When the refrigerator is powered off, to ensure an extended cooling time, the Stirling engine drives piston II to move up and down repeatedly within the liquid inlet channel through temperature difference and the Stirling principle. This allows for continuous control of liquid flow, increasing the heat resistance of the rear of the refrigerator. Simultaneously, when the liquid passes through the expansion valve into the refrigerator and freezer compartments, it releases cold air, further extending the cooling time of the refrigerator without requiring manual intervention.

[0024] Second, this invention utilizes the cooperation between the liquid-passing pipe, piston one, spring one, rope, door panel, telescopic rod, vertical pipe, and horizontal pipe. Whenever the operator opens and closes the door panel, the vertical pipe draws the liquid in the storage tank into the telescopic rod, and finally the liquid is discharged to the rear of the freezer chamber through the horizontal pipe. This facilitates the mixing of outside air and water droplets condensed from the air, preventing icing from occurring at the rear of the freezer chamber and improving the functionality of the device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural diagram of the present invention:

[0027] Figure 2 This is a schematic diagram of the rear three-dimensional structure of the present invention:

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle:

[0029] Figure 4 This is a schematic diagram of the internal structure of the refrigerator of the present invention:

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure for the rope layout installation of the present invention:

[0031] Figure 6 This is a schematic diagram of the internal structure of the refrigerator at the rear of the present invention:

[0032] Figure 7 This is a three-dimensional structural diagram of the temperature difference liquid control mechanism of the present invention:

[0033] Figure 8 for Figure 6 Enlarged view at point C;

[0034] Figure 9 This is a plan view of the interior side of the refrigerator according to the present invention;

[0035] Figure 10 for Figure 9 Enlarged view of point D in the middle.

[0036] Attached reference numerals: 1. Refrigerator; 10. Refrigerator compartment; 11. Freezer compartment; 12. Door panel; 13. Rope; 14. Fixed component; 17. Liquid storage tank; 18. Threaded cap; 2. Liquid passage pipe; 20. Liquid passage trough; 21. Vertical pipe; 22. Piston one; 23. Spring one; 24. One-way valve one; 25. Fixing ring; 26. Telescopic rod; 27. One-way valve two; 28. Injector nozzle; 29. ​​Horizontal pipe; 3. Temperature difference liquid control mechanism; 30. Liquid inlet channel; 31. Cold air pipe; 32. Copper ring; 33. Stirling engine; 34. Connecting rod; 35. Piston II; 36. Check valve III; 37. Check valve IV; 38. Injection channel; 39. Insulation plate; 4. Rotating rod; 40. Baffle plate; 41. Rectangular rod; 42. Snap-fit ​​groove; 43. N-shaped rod; 44. Drainage channel; 45. Blocking ball; 46. Groove; 47. Rotating rod; 48. Expansion valve; 5. Collection tank I; 50. Inlet tank I; 51. Check valve V; 52. Collection tank II; 53. Inlet tank II; 6. Insulation baffle; 60. Arc-shaped groove; 61. Temperature-controlled groove. Detailed Implementation

[0037] 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.

[0038] The present invention will be further described below with reference to embodiments.

[0039] Example: Refer to Figures 1 to 7 This invention provides a technical solution: a cold-keeping operation device and method for a refrigerator, comprising: a refrigerator 1 and a temperature difference liquid control mechanism 3. A liquid storage tank 17 is provided at the bottom of the refrigerator 1. A liquid injection channel 38 is provided on one side of the liquid storage tank 17 in the temperature difference liquid control mechanism 3. An inlet channel 30 is provided on the inner wall of the liquid injection channel 38. One end of the liquid injection channel 38 is connected to a cold air pipe 31. A Stirling engine 33 in the temperature difference liquid control mechanism 3 is sleeved on the outer wall of the cold air pipe 31. The top of the Stirling engine 33 has a piston 35 that can move up and down. The piston 35 is airtightly slidably connected to the inner wall of the inlet channel 30. The piston 35 can drive the hydraulic flow in the inlet channel 30. One end of the inlet channel 30 is connected to a drain channel 44. The drain channel 44 is a series of corner pipes connected vertically. An expansion valve 48 is fixedly installed on the inner wall of the drain channel 44. When the refrigerator 1 is powered on for cooling, the liquid in the liquid storage tank 17 can be stored for cold.

[0040] like Figures 2 to 4 and Figure 6As shown, the inner walls of the refrigerator 1 are provided with a refrigerator compartment 10 and a freezer compartment 11. The refrigerator compartment 10 is located directly above the freezer compartment 11. Four fixed extension members 14 are fixedly installed on the inner top of the freezer compartment 11. Ropes 13 are slidably connected to the inner walls of the fixed extension members 14. A door panel 12 is fixedly installed at one end of the rope 13. One side of the door panel 12 is rotatably connected to one side of the refrigerator 1. There is a liquid injection groove between the freezer compartment 11 and the liquid storage tank 17. The liquid injection groove is threadedly connected with a threaded cap 18. A temperature passage groove 61 is provided on the rear side of the refrigerator 1. The Stirling engine 33 is located in the temperature passage groove 61. A heat insulation baffle 6 can be snapped onto the inner wall of the temperature passage groove 61. An arc-shaped groove 60 is provided on the side of the heat insulation baffle 6 away from the temperature passage groove 61.

[0041] After the refrigerator 1 is powered off, the operator first holds the arc-shaped groove 60 with two fingers, then removes the heat insulation baffle 6 from the heat passage groove 61, and then manually moves the connecting rod 34 up and down and opens the inner wall of the cold air pipe 31. The connecting rod 34 is driven to move up and down repeatedly by the temperature difference effect in the steam engine principle. That is, the connecting rod 34 drives the piston 2 35 to move up and down repeatedly between the one-way valve 3 36 and the one-way valve 4 37, so that the liquid in the liquid storage tank 17 flows into the liquid inlet channel 30, and then enters the liquid outlet channel 44. Finally, it flows out from the top of the refrigerator compartment 10 through the expansion valve 48, which improves the heat resistance of the refrigerator compartment 10. When the liquid in the liquid storage tank 17 is insufficient, the operator can manually rotate the threaded cap 18 to inject liquid into the inner wall of the liquid injection tank.

[0042] Reference Appendix Figure 10 The diagram shows the direction of liquid flow within the inlet channel 30. (Refer to the attached diagram.) Figure 9 As shown, the Stirling engine 33 uses a commercially available Stirling cup lid. However, the existing Stirling cup lid has relatively low kinetic energy and cannot drive the liquid flow in the drain channel 44. Therefore, the copper material in the copper ring 32 is used to absorb heat, increasing the temperature of the outer wall of the cooling pipe 31, thereby increasing the temperature difference and giving the Stirling engine 33 greater kinetic energy. The drain channel 44 is composed of multiple corner pipes connected vertically. Each corner pipe has vertical and horizontal pipes connected to each other. The horizontal pipes, being horizontal, can reduce the impact of... Figure 10 The piston 2 35 pushes the liquid upward against the reverse hydraulic pressure above the check valve 4 37, thereby ensuring that the piston 2 35 can push the liquid into the check valve 4 37 and through the expansion valve 48.

[0043] To clarify, the liquid in the storage tank 17 can be a brine mixture with a salt concentration of approximately 20%. When the refrigerator 1 is powered on and cooling, the freezer compartment 11 has a minimum temperature of -16°C. The brine mixture in the storage tank 17 stores cold and exists in a "solid-liquid coexistence" state (a small amount of liquid + a large amount of solid), with the solid at the top and the liquid at the bottom. When the refrigerator 1 is powered off and no longer cooling, the brine mixture (solid) releases low temperatures for a longer period than the liquid brine mixture. Therefore, when a portion of the brine mixture (solid) melts, the liquid will be controlled by the temperature difference liquid control mechanism 3. When brought to the refrigerator compartment 10, and with the expansion valve 48, the liquid mixture will be transformed into a lower temperature gaseous and liquid product. The remaining liquid will re-enter the storage tank 17 until the temperature difference between the low temperature of the brine mixture and the high temperature of the outside is insufficient to support the operation of the temperature difference control mechanism 3. If cold preservation is still required, the temperature difference control mechanism 3 can be manually driven to convert the air and residual brine mixture in the refrigerator 1 into low temperature gas through the expansion valve 48, thereby extending the cold preservation effect. Due to the Joule-Thomson effect, the temperature drops from room temperature (e.g., 25°C) to 5 to 15°C.

[0044] like Figure 7 and Figure 10 As shown, the inner wall of the liquid injection channel 38 is airtightly rotatably connected to a heat insulation plate 39. A rotating rod 4 is fixedly installed on one side of the heat insulation plate 39, and a baffle plate 40 is fixedly installed on the other end of the rotating rod 4. A rectangular rod 41 is fixedly installed on the other side of the baffle plate 40. An n-shaped rod 43 is slidably connected through one side of the rectangular rod 41. A snap-fit ​​groove 42 is opened on the rear side of the refrigerator 1. One side of the n-shaped rod 43 can be inserted into the inner wall of the snap-fit ​​groove 42. A copper ring 32 is fixedly installed on the outer wall of the cold air pipe 31. The Stirling engine 33 can be snapped between the cold air pipe 31 and the copper ring 32. A connecting rod 34 is slidably connected to the top of the Stirling engine 33. The top of the connecting rod 34 is fixedly installed on the bottom of the piston 35. A one-way valve 36 and a one-way valve 47 are fixedly installed on the inner wall of the liquid inlet channel 30. The piston 35 moves up and down by hydraulically driving the one-way valve 36 and the one-way valve 47 to control the liquid flow.

[0045] Reference Appendix Figure 7 After removing the heat insulation baffle 6, the operator then removes the n-shaped rod 43 and manually rotates the baffle 40 by 90 degrees. This allows the low temperature in the injection channel 38 to be transferred to the cooling pipe 31, creating a temperature difference with the high temperature outside. When the Stirling engine 33 is not needed, the operator can first manually rotate the baffle 40 by 90 degrees, then place the n-shaped rod 43 on the outer wall of the rectangular rod 41, and then snap it into the snap-fit ​​groove 42. The snap-fit ​​of the n-shaped rod 43 into the rectangular rod 41 prevents the heat insulation plate 39 from rotating freely due to the hydraulic pressure caused by the liquid suction of the liquid pipe 2.

[0046] like Figures 7 to 10As shown, an inlet groove 50 is provided at the top inner part of the liquid storage tank 17. A one-way valve 51 is fixedly installed on the inner wall of the inlet groove 50. The other end of the inlet groove 50 is connected to a collection groove 5. The collection groove 5 is located at the bottom inner part of the freezer compartment 11. A vertical pipe 21 is connected to the bottom inner part of the freezer compartment 11. A liquid passage pipe 2 is connected to the bottom end of the vertical pipe 21. Multiple liquid passage grooves 20 are arranged in a circular array on the outer wall of the liquid passage pipe 2 near the bottom end. A one-way valve 6 is fixedly installed on the inner wall of the liquid passage pipe 2. The liquid passage pipe 2 is located on the inner wall of the liquid storage tank 17. A fixing ring 25 is fixedly installed on the inner wall of the vertical pipe 21. A spring 23 is fixedly installed at the bottom of the fixing ring 25. A piston 22 is fixedly installed at the bottom of the vertical pipe 21. A telescopic rod 26 and a rope 13 are fixedly installed at the top of the piston 22. The rope 13 extends above the fixed ring 25 and is slidably connected to the outer wall of the vertical pipe 21. A one-way valve 24 is fixedly installed at the bottom of the piston 22. The one-way valve 24 and the telescopic rod 26 are interconnected. A one-way valve 27 is connected to the top of the telescopic rod 26. A horizontal pipe 29 is fixedly installed at the top of the vertical pipe 21. Multiple spray nozzles 28 are linearly arrayed on the outer wall of the horizontal pipe 29. The liquid outlets of the multiple spray nozzles 28 are inclined toward the rear inner wall of the freezing chamber 11. The inner wall of the horizontal pipe 29 is fixedly installed on the outer wall of the one-way valve 27.

[0047] Reference Appendix Figure 4 Whenever the operator opens the door panel 12, the outside temperature will enter the refrigerator 1. After the operator closes the door panel 12, the outside temperature that entered the refrigerator 1 will condense into water and adhere to the inside rear side of the refrigerator 1. This will then form an ice layer, which is not easy to clean the refrigerator 1 and will also cause the ice layer to freeze the food together.

[0048] Therefore, whenever the operator flips open the door panel 12, the door panel 12 will move the rope 13, as shown in the attached diagram. Figure 6As shown, rope 13 drives piston 22 to move upward, and the liquid in storage tank 17 enters the inner wall of liquid pipe 2 from liquid channel 20. Simultaneously, the piston 22 generates a first elastic potential energy through spring 23 as it moves. When door panel 12 is open and stationary, the liquid storage in liquid pipe 2 has reached its maximum value. When door panel 12 is closed, the second elastic potential energy drives piston 22 to move downward. Due to the one-way valve 6 in liquid pipe 2 restricting the flow of liquid from liquid pipe 2 to the outer wall of liquid pipe 2, and the cooperation of one-way valve 24, the liquid flow... The liquid in pipe 2 moves into telescopic rod 26 through one-way valve 24. When the door panel 12 is opened for the second time, piston 22 moves upward to drive telescopic rod 26 to shorten its length, which in turn squeezes the liquid in telescopic rod 26 into horizontal pipe 29 until the horizontal pipe 29 is full of liquid. When telescopic rod 26 shortens its length again, the liquid in horizontal pipe 29 will be evenly discharged into each spray nozzle 28 and adhere to the rear side of the freezer compartment 11 to absorb heat from the outside air and dilute water vapor, thus preventing icing from occurring on the rear side of the freezer compartment 11.

[0049] like Figure 8 As shown, the inner wall of the refrigerator compartment 10 is provided with a liquid collection tank 52, and the bottom of the refrigerator compartment 10 is provided with a liquid inlet tank 53, which is connected to the top of the freezer compartment 11. The liquid inlet tank 53 and the liquid collection tank 52 are interconnected. A blocking ball 45 is airtightly rotatably connected to the inner wall of the liquid inlet tank 53. The outer walls of the two blocking balls 45 are provided with slots 46. A rotating rod 47 is fixedly installed on the outer walls of the two blocking balls 45. The outer wall of the rotating rod 47 passes through and is airtightly rotatably connected to one side of the refrigerator 1.

[0050] To prevent excessive liquid accumulation on the rear side of the refrigerator compartment 10, after ensuring the Stirling engine 33 is operating normally, the operator can manually rotate the lever 47 90 degrees to align the slot 46 with the inlet 53 and the drain channel 44 on the same plane. This also ensures that the liquid in the drain channel 44 can pass through the expansion valve 48 and then adhere to the rear side of the refrigerator compartment 10. When the inner wall of the inlet 53 is opened, the liquid will accumulate on the rear side of the freezer compartment 11 and the inner wall of the collection tank 5. When the liquid level in the storage tank 17 is lower than the liquid passage 20 or the inner wall of the injection channel 38 cannot be filled with liquid, refer to the attached... Figure 10 As shown, due to insufficient liquid volume, negative pressure will be generated in the liquid storage tank 17, which will allow the one-way valve 51 to open the inner wall of the liquid inlet tank 50, allowing the liquid in the collection tank 5 to re-enter the liquid storage tank 17 for recycling and increasing the cold preservation time of the refrigerator 1.

[0051] In addition, the present invention provides a method for maintaining the cold operation of a refrigerator, comprising the following steps;

[0052] S1. When refrigerator 1 is in a power-off state, first remove the heat insulation baffle 6 through the arc groove 60, so that the outside hot air can fully contact the copper ring 32 and the Stirling engine 33. Drive the connecting rod 34 to move in a cycle by Stirling cycle principle. At the same time, cooperate with one-way valve three 36 and one-way valve four 37 to control the liquid flow from the liquid storage tank 17 into the drain channel 44. The liquid in the drain channel 44 can absorb the heat at the back of refrigerator 1.

[0053] S2. After the liquid in piston 2 35 passes through expansion valve 48, it is transformed into a mixture of cold liquid and cold gas and enters the refrigerator compartment 10. At the same time, the inner wall of liquid inlet tank 2 53 is opened to connect the refrigerator compartment 10 and the freezer compartment 11, so that the mixture can absorb the heat in the refrigerator compartment 10 and the freezer compartment 11.

[0054] S3. Whenever the door panel 12 is opened, the liquid in the liquid storage tank 17 can be driven to adhere to the rear inner side of the liquid storage tank 17 through the spray nozzle 28 by pulling the rope 13 to absorb the heat from the outside.

[0055] Working principle: When the refrigerator 1 is powered off, the operator first holds the arc-shaped groove 60 with two fingers, then removes the heat insulation baffle 6 from the heat passage groove 61, then manually moves the connecting rod 34 up and down and opens the inner wall of the cold air pipe 31, and finally manually rotates the rotating rod 47 ninety degrees so that the groove opening 46 is on the same plane as the liquid inlet groove 53 and the liquid drain channel 44.

[0056] The connecting rod 34 is driven to move up and down repeatedly by the temperature difference effect in the steam engine principle. That is, the connecting rod 34 drives the piston 35 to move up and down repeatedly between the one-way valve 36 and the one-way valve 37, so that the liquid in the storage tank 17 flows into the liquid inlet channel 30, then into the liquid outlet channel 44, and finally flows out from the top of the refrigerator compartment 10 through the expansion valve 48, which improves the heat resistance of the refrigerator compartment 10. When the liquid in the storage tank 17 is insufficient, the operator can manually rotate the threaded cap 18 to inject liquid into the inner wall of the injection tank.

[0057] Whenever the operator flips open door panel 12, door panel 12 will move rope 13, as shown in the attached diagram. Figure 6As shown, rope 13 drives piston 22 to move upward, and the liquid in storage tank 17 enters the inner wall of liquid pipe 2 from liquid channel 20. Simultaneously, the piston 22 generates a first elastic potential energy through spring 23 as it moves. When door panel 12 is open and stationary, the liquid storage in liquid pipe 2 has reached its maximum value. When door panel 12 is closed, the second elastic potential energy drives piston 22 to move downward. Due to the one-way valve 6 in liquid pipe 2 restricting the flow of liquid from liquid pipe 2 to the outer wall of liquid pipe 2, and the cooperation of one-way valve 24, the liquid flow... The liquid in pipe 2 moves into telescopic rod 26 through one-way valve 24. When the door panel 12 is opened for the second time, piston 22 moves upward to drive telescopic rod 26 to shorten its length, which in turn squeezes the liquid in telescopic rod 26 into horizontal pipe 29 until the horizontal pipe 29 is full of liquid. When telescopic rod 26 shortens its length again, the liquid in horizontal pipe 29 will be evenly discharged into each spray nozzle 28 and adhere to the rear side of the freezer compartment 11 to absorb heat from the outside air and dilute water vapor, thus preventing icing from occurring on the rear side of the freezer compartment 11.

[0058] 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 cold-keeping operation device for a refrigerator, characterized in that, include: A refrigerator (1) and a temperature difference liquid control mechanism (3) are provided. The refrigerator (1) has a liquid storage tank (17) at its bottom. The liquid injection channel (38) in the temperature difference liquid control mechanism (3) is located on one side of the liquid storage tank (17). The inner wall of the liquid injection channel (38) is provided with an inlet channel (30). One end of the liquid injection channel (38) is connected to a cold air pipe (31). The Stirling engine (33) in the temperature difference liquid control mechanism (3) is fitted on the outer wall of the cold air pipe (31). The top of the Stirling engine (33) has a piston two (35) that moves up and down. The piston two (35) is airtightly slidably connected to the inner wall of the inlet channel (30). The piston two (35) drives the hydraulic flow in the inlet channel (30). One end of the liquid inlet channel (30) is connected to the liquid outlet channel (44), which is a series of corner pipes connected vertically. An expansion valve (48) is fixedly installed on the inner wall of the liquid outlet channel (44). When the refrigerator (1) is powered on for cooling, the liquid in the liquid storage tank (17) is stored and cooled. The refrigerator (1) has a cold storage compartment (10) inside; the inner wall of the liquid inlet channel (30) is fixedly equipped with a one-way valve three (36) and a one-way valve four (37); the Stirling engine (33) drives the piston two (35) to move up and down repeatedly between the one-way valve three (36) and the one-way valve four (37) through the temperature difference formed by the low temperature in the cold air pipe (31) and the high temperature outside, so that the liquid in the liquid storage tank (17) flows into the liquid inlet channel (30), then enters the liquid outlet channel (44), and finally flows out from the top of the cold storage compartment (10) through the expansion valve (48).

2. The cold-keeping operation device for a refrigerator according to claim 1, characterized in that: The refrigerator (1) also has a freezer compartment (11) and a refrigerator compartment (10) located directly above the freezer compartment (11). Four extension members (14) are fixedly installed on the inner top of the freezer compartment (11). Ropes (13) are slidably connected to the inner wall of the extension members (14). A door panel (12) is fixedly installed at one end of the rope (13). One side of the door panel (12) is rotatably connected to one side of the refrigerator (1). There is a liquid injection tank between the freezer compartment (11) and the liquid storage tank (17), and the liquid injection tank is threadedly connected with a threaded cap (18). The refrigerator (1) has a heat-venting groove (61) on its rear side. The Stirling engine (33) is located in the heat-venting groove (61). The inner wall of the heat-venting groove (61) is fitted with a heat-insulating baffle (6). The side of the heat-insulating baffle (6) away from the heat-venting groove (61) has an arc-shaped groove (60).

3. The cold-keeping operation device for a refrigerator according to claim 2, characterized in that: The inner wall of the liquid injection channel (38) is airtightly rotatably connected to a heat insulation plate (39). A rotating rod (4) is fixedly installed on one side of the heat insulation plate (39), and a baffle plate (40) is fixedly installed on the other end of the rotating rod (4). A rectangular rod (41) is fixedly installed on the other side of the baffle plate (40). An n-shaped rod (43) is slidably connected through one side of the rectangular rod (41). A snap-fit ​​groove (42) is opened on the rear side of the refrigerator (1). One side of the n-shaped rod (43) is inserted into the inner wall of the snap-fit ​​groove (42). The baffle plate (40) is rotated ninety degrees to allow the low temperature in the liquid injection channel (38) to be transferred to the cold air pipe (31).

4. The cold-keeping operation device for a refrigerator according to claim 2, characterized in that: A copper ring (32) is fixedly installed on the outer wall of the air cooling pipe (31). The Stirling engine (33) is snapped between the air cooling pipe (31) and the copper ring (32). A connecting rod (34) is slidably connected to the top of the Stirling engine (33). The top of the connecting rod (34) is fixedly installed on the bottom of the piston (35).

5. The cold-keeping operation device for a refrigerator according to claim 4, characterized in that: The liquid storage tank (17) has an inlet tank (50) at its inner top. A one-way valve (51) is fixedly installed on the inner wall of the inlet tank (50). The other end of the inlet tank (50) is connected to a collection tank (5). The collection tank (5) is located at the bottom of the freezer chamber (11). A vertical pipe (21) is connected to the bottom of the freezer chamber (11). A liquid passage pipe (2) is connected to the bottom of the vertical pipe (21). Multiple liquid passage slots (20) are arranged in a circular array on the outer wall of the liquid passage pipe (2) near its bottom. A one-way valve is fixedly installed on the inner wall of the pipe (2). The liquid pipe (2) is located on the inner wall of the liquid storage tank (17). A fixing ring (25) is fixedly installed on the inner wall of the vertical pipe (21). A spring (23) is fixedly installed at the bottom of the fixing ring (25). A piston (22) is fixedly installed at the bottom end of the spring (23). A telescopic rod (26) and a rope (13) are fixedly installed at the top of the piston (22). The rope (13) extends above the fixing ring (25) and slides through and is connected to the outer wall of the vertical pipe (21).

6. The cold-keeping operation device for a refrigerator according to claim 5, characterized in that: One-way valve 1 (24) is fixedly installed at the bottom of piston 1 (22). One-way valve 1 (24) and telescopic rod (26) are interconnected. One-way valve 2 (27) is connected to the top of telescopic rod (26). A horizontal pipe (29) is fixedly installed at the top of the vertical pipe (21). A plurality of spray nozzles (28) are connected to the outer wall of the horizontal pipe (29) in a linear array. The liquid outlet ends of the plurality of spray nozzles (28) are inclined toward the rear inner wall of the freezing chamber (11). The inner wall of the horizontal pipe (29) is fixedly installed on the outer wall of the one-way valve (27).

7. The cold-keeping operation device for a refrigerator according to claim 6, characterized in that: The inner wall of the refrigerator compartment (10) is provided with a liquid collection tank (52), and the bottom of the refrigerator compartment (10) is provided with a liquid inlet tank (53) and the liquid inlet tank (53) is connected to the top of the freezer compartment (11). The liquid inlet tank (53) and the liquid collection tank (52) are connected to each other. The inner wall of the liquid inlet tank (53) is airtightly rotatably connected with a blocking ball (45). The outer walls of the two blocking balls (45) are provided with slots (46). The outer walls of the two blocking balls (45) are fixedly installed with a rotating rod (47). The outer wall of the rotating rod (47) is through and airtightly rotatably connected to one side of the refrigerator (1).

8. A method for maintaining cold operation of the cold-maintaining operation device according to claim 7, characterized in that, Includes the following steps: S1. When the refrigerator (1) is in a power-off state, the heat insulation baffle (6) is taken out through the arc groove (60) so that the outside hot air can fully contact the copper ring (32) and the Stirling engine (33). The connecting rod (34) is driven to move up and down in a cycle by the Stirling cycle principle. At the same time, the liquid flow is controlled by the three one-way valves (36) and the four one-way valves (37) to enter the drain channel (44) from the liquid storage tank (17). The liquid in the drain channel (44) absorbs the heat from the back of the refrigerator (1). S2. After the liquid passes through the expansion valve (48), it is transformed into a mixture of cold liquid and cold gas and enters the cold storage compartment (10). At the same time, by opening the inner wall of the liquid inlet tank two (53), the cold storage compartment (10) and the freezer compartment (11) are connected to each other, so that the mixture absorbs the heat in the cold storage compartment (10) and the freezer compartment (11). S3. Whenever the door panel (12) is opened, the liquid in the storage tank (17) is driven by pulling the rope (13) to adhere to the rear inner side of the freezer (11) through the spray nozzle (28) to absorb the heat from the outside.

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