CN-122015320-A - High-power Stirling refrigerator for refrigerator and refrigerator

CN122015320ACN 122015320 ACN122015320 ACN 122015320ACN-122015320-A

Abstract

The application discloses a high-power Stirling refrigerator and a refrigerator for a refrigerator, comprising a shell component, a cylinder component, a piston component and a linear motor, wherein the cylinder component is arranged in the shell component, the cylinder component comprises an integrated cylinder, the piston component comprises a power piston mechanism, the power piston mechanism comprises a power piston, the linear motor sequentially comprises an inner magnetic yoke, a magnetic ring and an outer magnetic yoke from inside to outside along the radial direction of the linear motor, the outer magnetic yoke is provided with a concave part facing the magnetic ring, the concave part is used for winding a coil, the lower end of the magnetic ring is provided with a magnetic ring supporting frame, the magnetic ring supporting frame is connected with the power piston, and when the electrified coil interacts with the magnetic ring, the linear reciprocating motion of the magnetic ring drives the magnetic ring supporting frame to perform linear reciprocating motion, so as to drive the power piston to perform linear reciprocating motion in the integrated cylinder. The refrigerator is cooperatively optimized on the structural layer and the control layer, so that the efficiency of the whole refrigerator is improved, vibration noise is reduced, and efficient operation in a wide working condition range is realized.

Inventors

Xiang Hanzhen
Gu Wanjia
LI JINCHAO
MENG WEN

Assignees

苏州华冷科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. A high-power Stirling refrigerator for a refrigerator is characterized by comprising a shell component, a cylinder component, a piston component and a linear motor, wherein the cylinder component, the piston component and the linear motor are arranged in the shell component; The cylinder assembly comprises an integrated cylinder (32), the piston assembly comprising a power piston mechanism comprising a power piston (30); The linear motor sequentially comprises an inner magnetic yoke (28), a magnetic ring (29) and an outer magnetic yoke (11) from inside to outside along the radial direction of the linear motor, wherein the outer magnetic yoke (11) is provided with a concave part facing the magnetic ring (29), the concave part is used for winding a coil (10), the lower end of the magnetic ring (29) is provided with a magnetic ring support frame (26), the magnetic ring support frame (26) is connected with a power piston (30), and when the coil (10) is electrified and the magnetic ring (29) interact, the linear reciprocating motion of the magnetic ring (29) drives the magnetic ring support frame (26) to do linear reciprocating motion, so that the power piston (30) is driven to do linear reciprocating motion in an integrated cylinder (32).
2. The stirling cooler of claim 1, wherein the power piston mechanism further comprises a power plate spring (24), the power plate spring (24) being connected to the magnetic ring support (26) by a first connection.
3. The stirling cooler according to claim 2, characterized in that the power piston (30) is an annular member, the power piston (30) comprising a central cavity, the piston assembly further comprising a discharge piston mechanism comprising a first discharge piston (33) and a discharge piston connecting rod (31), the discharge piston connecting rod (31) passing sequentially through the power leaf spring (24), the magnet ring support frame (26), the central cavity of the power piston (30) and the compression cavity of the terlin cooler in the axial direction of the discharge piston connecting rod (31) and being connected to the first discharge piston (33).
4. The stirling cooler according to claim 2, wherein the magnetic ring support (26) includes a first connection portion (261) and a second connection portion (262), the first connection portion (261) is annular, the first connection portion (261) is perpendicular to the second connection portion (262), the first connection portion (261) is connected to a lower end of the magnetic ring (29), and an upper surface of the second connection portion (262) is connected to a lower surface of the power piston (30).
5. The stirling cooler of claim 4, wherein a motor fixing structure is further disposed in the case assembly, the motor fixing structure comprises a soft magnetic fixing frame (13), an upper end face of the soft magnetic fixing frame (13) is connected with the outer yoke (11), and a lower end face of the soft magnetic fixing frame (13) is connected with the power plate spring (24).
6. The stirling cooler of claim 4, further comprising a cold finger assembly coaxially disposed at an upper end of the housing assembly, the cold finger assembly comprising a cold finger base (8) and a hot side heat sink (7), the hot side heat sink (7) being disposed above the cold finger base (8), the integral cylinder (32) being connected to the cold finger base (8).
7. The stirling cooler of claim 6, wherein the integrated cylinder (32) comprises a first cylinder sub-section, a second cylinder sub-section and a third cylinder sub-section, the first cylinder sub-section being located between the power piston (30) and an inner yoke (28) in the radial direction, the second cylinder sub-section being connected with the cold finger base (8).
8. The stirling cooler according to claim 1, wherein the housing assembly comprises a lower housing (9), the lower housing (9) comprising an annular housing portion (91) and a bottom closure housing portion (92), the stirling cooler further comprising a damper assembly disposed outside the housing assembly, the damper assembly comprising damper stator set screws (15) connected to the bottom closure housing portion (92).
9. A refrigerator comprising a stirling cooler in accordance with any one of claims 1 to 8, the refrigerator comprising a controller configured for variable frequency, variable voltage drive control of the linear motor.
10. A control method for controlling the operation of the refrigerator of claim 9, comprising the steps of: The controller drives the linear motor of the Stirling refrigerator to move according to preset initial excitation voltage and excitation frequency, so that the Stirling refrigerator is started and enters a refrigerating state; if the temperature in the refrigerator cabinet does not reach the target temperature, the controller is configured to increase the excitation voltage to increase the input power of the Stirling refrigerator; In the process of increasing the excitation voltage, monitoring the stroke of the power piston of the Stirling refrigerator in real time, and adjusting the excitation voltage in a closed loop manner to ensure that the stroke of the power piston is always at a set value, wherein the set value is any value between 1mm and 15 mm; When the temperature within the refrigerator cabinet reaches a target temperature, the controller is configured to reduce the excitation voltage to reduce the input power of the Stirling refrigerator and the power piston stroke until a minimum input power is reached that maintains the target temperature within the refrigerator cabinet; And adjusting the excitation voltage and the excitation frequency in a small range, finding an optimal working point corresponding to the minimum input power required for maintaining the target temperature in the box, and maintaining the operation at the working point.

Description

High-power Stirling refrigerator for refrigerator and refrigerator Technical Field The application relates to the technical field of refrigeration, in particular to a high-power Stirling refrigerator for a refrigerator and the refrigerator. Background The Stirling refrigerator is a device for realizing refrigeration by utilizing periodic compression and expansion of gas, and has the advantages of high theoretical efficiency, adoption of inert gas as working medium, environmental friendliness and the like. In recent years, with the development of low-temperature refrigerators, medical cold chains and high-end household appliances, the application requirements of Stirling refrigerators in the field of small-sized and high-efficiency refrigeration are continuously improved. However, in the prior art, the application of stirling coolers to refrigerator systems still faces a number of technical bottlenecks. Firstly, the traditional Stirling refrigerator mostly adopts a rotating motor-crank connecting rod structure, and has the problems of large mechanical friction, limited reliability and difficult further improvement of efficiency. In the existing linear driving Stirling refrigerator, the matching degree of the linear motor structure and the Stirling mechanism part is insufficient, so that the electromagnetic efficiency is low, the high-order vibration component of the mover is large, and the noise and vibration of the whole refrigerator are caused. Again, under part-load conditions (i.e., most of the time the refrigerator is operating steadily), the drive frequency and the natural frequency of the system deviate, resulting in an increase in input power and a decrease in refrigeration efficiency. Therefore, there is an urgent need in the art to develop a high power stirling refrigerator for a refrigerator, which improves the overall efficiency, reduces vibration noise, and achieves efficient operation in a wide range of operating conditions by performing cooperative optimization on both the structural and control levels. Disclosure of Invention The application aims to provide a high-power Stirling refrigerator for a refrigerator, which improves the efficiency of the whole refrigerator, reduces vibration noise and realizes high-efficiency operation in a wide working condition range by carrying out cooperative optimization on a structural layer and a control layer. The application provides a high-power Stirling refrigerator for a refrigerator, which comprises a shell component, a cylinder component, a piston component and a linear motor, wherein the cylinder component, the piston component and the linear motor are arranged in the shell component; The cylinder assembly comprises an integrated cylinder, the piston assembly comprises a power piston mechanism, and the power piston mechanism comprises a power piston; The linear motor sequentially comprises an inner magnetic yoke, a magnetic ring and an outer magnetic yoke from inside to outside along the radial direction of the linear motor, wherein the outer magnetic yoke is provided with a concave part facing the magnetic ring, the concave part is used for winding a coil, the lower end of the magnetic ring is provided with a magnetic ring supporting frame, the magnetic ring supporting frame is connected with the power piston, and when the coil is electrified to interact with the magnetic ring, the linear reciprocating motion of the magnetic ring drives the magnetic ring supporting frame to do linear reciprocating motion, so that the power piston is driven to do linear reciprocating motion in the integrated cylinder. In another preferred embodiment, the coil is wound with a flat wire, thereby increasing the number of turns of the windable coil in the limited space of the recess, improving motor efficiency. In another preferred embodiment, the power piston mechanism further comprises a power plate spring, which is connected to the magnetic ring support frame via a first connection piece. In another preferred embodiment, the power plate spring, the magnetic ring support frame and the power piston are fixedly connected through the first connecting piece. In another preferred embodiment, the first connecting piece is a power piston fixing screw, and the number of the power piston fixing screws is 1, and the first connecting piece is a ring screw. In another preferred embodiment, the power piston is an annular member, the power piston includes a central cavity, the piston assembly further includes a discharge piston mechanism including a first discharge piston and a discharge piston connecting rod, and in an axial direction of the discharge piston connecting rod, the discharge piston connecting rod sequentially passes through the power leaf spring, the magnetic ring support, the central cavity of the power piston, and the compression chamber of the terlin refrigerator and is connected with the first discharge piston. In another preferred embodiment, the discharge piston m