Multistage refrigerator

Abstract

The present disclosure relates to the technical field of refrigerators, and particularly relates to a multi-stage refrigerator, which comprises a first refrigerating device, at least one second refrigerating device and at least one refrigerating platform, the first refrigerating device is used for primary refrigeration, the second refrigerating device is used for at least secondary refrigeration, the second refrigerating device comprises a second compression component, and the refrigerating platform is communicated with the second compression component. Since the refrigerating platform is communicated with the second compression component, an overcharge accumulator does not need to be separately arranged, and energy waste of the overcharge accumulator is avoided.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of refrigerators, and in particular to a multi-stage refrigerator. BACKGROUND

[0002] Refrigerators can be classified into gas-coupled and heat-coupled types according to their coupling modes. The heat-coupled refrigerator mainly consists of two parts: a pre-cooling refrigerator and a low-temperature refrigerator. The cold head of the pre-cooling refrigerator is connected to the middle part of the regenerator of the low-temperature refrigerator through a heat bridge to pre-cool the regenerator. In this way, the working gas entering the low-temperature refrigerator is pre-cooled to a certain temperature, and a lower refrigeration temperature is generated at the cold head. However, the low-temperature refrigerator is connected with an over-accumulating cold device when it is refrigerating, and the setting of the over-accumulating cold device will cause the problem of energy waste. SUMMARY

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a multi-stage refrigerator.

[0004] The present disclosure provides a multi-stage refrigerator, comprising:

[0005] A first refrigeration device for primary refrigeration.

[0006] At least one second refrigeration device for at least secondary refrigeration, the second refrigeration device comprising a second compression component.

[0007] At least one refrigeration platform in communication with the second compression component.

[0008] Optionally, the number of refrigeration platforms is the same as the number of second refrigeration devices.

[0009] Optionally, two refrigeration platforms and two second refrigeration devices are provided. The second compression component on the first second refrigeration device is in communication with the first refrigeration platform for secondary refrigeration, and the second compression component on the second second refrigeration device is in communication with the second refrigeration platform for tertiary refrigeration.

[0010] Optionally, the second compression component comprises a second housing, a second driving member and a second piston. The second driving member and the second piston are located inside the second housing, and the second driving member is used to drive the second piston to work.

[0011] The second housing is in communication with the refrigeration platform.

[0012] Optionally, the second housing is in communication with the refrigeration platform through a connecting pipe, and the caliber of the connecting pipe is smaller than the caliber of the second housing.

[0013] Optionally, the multi-stage refrigerator further comprises a cold finger hot end, the cold finger hot end is located at one side of the refrigeration platform.

[0014] The second shell penetrates the cold finger hot end and communicates with the refrigeration platform.

[0015] Optionally, the second driving member and the refrigeration platform are distributed on two sides of the cold finger hot end.

[0016] Optionally, the multi-stage refrigerator further comprises a cold finger hot end, the cold finger hot end is located at one side of the refrigeration platform, and the second compression component is located between the cold finger hot end and the refrigeration platform.

[0017] Optionally, the second refrigeration device further comprises a second cold accumulator, a second refrigerator and a second pipe body, the second cold accumulator communicates with the refrigeration platform, and the second cold accumulator is connected with the second refrigerator through the second pipe body.

[0018] Optionally, the multi-stage refrigerator further comprises a terminal refrigeration platform, the terminal refrigeration platform and the cold finger hot end are distributed on two sides of the refrigeration platform.

[0019] The second pipe body is located inside the terminal refrigeration platform.

[0020] The technical scheme provided by the embodiments of the present disclosure has the following advantages compared with the prior art:

[0021] The multi-stage refrigerator provided by the embodiments of the present disclosure comprises a first refrigeration device, at least one second refrigeration device and at least one refrigeration platform, the first refrigeration device is used for primary refrigeration, the second refrigeration device is used for at least secondary refrigeration, the second refrigeration device comprises a second compression component, and the refrigeration platform communicates with the second compression component. Since the refrigeration platform communicates with the second compression component, an excessive cold accumulator does not need to be separately arranged, and energy waste of the excessive cold accumulator is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings incorporated into the specification and forming a part of the specification, show embodiments consistent with the present disclosure, and together with the specification, serve to explain the principles of the present disclosure.

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without creative labor.

[0024] Fig. 1 A structural schematic view of the multi-stage refrigerator described in the embodiments of the present disclosure;

[0025] Fig. 2 Another structural schematic diagram of the multi-stage refrigerator according to the embodiments of the present disclosure.

[0026] wherein,

[0027] 1, a first compression component; 101, a first piston; 2, a first cold accumulator; 3, a first refrigerator; 4, a first pipe body; 5, a second compression component; 501, a second shell; 502, a second driving member; 503, a second piston; 6, a second cold accumulator; 7, a second refrigerator; 8, a second pipe body; 9, a cold finger hot end; 10, a refrigeration platform; 11, a terminal refrigeration platform; 12, a first phase modulation mechanism; 13, a second phase modulation mechanism. DETAILED DESCRIPTION

[0028] In order to enable a more complete understanding of the above-mentioned purposes, features and advantages of the present disclosure, the schemes of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, not all the embodiments.

[0030] Reference Figs. 1-2 As shown in the figure, the embodiments of the present disclosure provide a multi-stage refrigerator, which comprises a first refrigeration device, at least one second refrigeration device and at least one refrigeration platform 10, the first refrigeration device is used for primary refrigeration, the second refrigeration device is used for at least secondary refrigeration, the second refrigeration device comprises a second compression component 5, and the refrigeration platform 10 is communicated with the second compression component 5. Since the refrigeration platform 10 is communicated with the second compression component 5, an excessive cold accumulator does not need to be separately arranged, and energy waste of the excessive cold accumulator is avoided.

[0031] In addition, the fluid in the compression component of the existing gas coupling type refrigerator needs to pass through the first cold accumulator 2 and the second cold accumulator 6 once, so that a great flow loss is generated, and the cooling efficiency of the refrigerator is low. The second compression component 5 in the multi-stage refrigerator of the present disclosure can directly compress the working medium in the second cold accumulator 6 in the second refrigeration device, avoid the loss caused by the working medium passing through the first refrigeration device, improve the compression efficiency, and thus improve the efficiency of the whole machine.

[0032] Wherein, the second compression component 5 is arranged close to the refrigeration platform 10, the fluid compressed by the second compression component 5 directly enters the refrigeration platform 10, and the problem of further energy waste is further avoided.

[0033] In addition, the number of refrigeration platforms 10 is the same as the number of second refrigeration devices, and one refrigeration platform 10 can correspond to one second refrigeration device.

[0034] When both the refrigeration platform 10 and the second refrigeration device are provided, the second compression component 5 on the second refrigeration device is connected to the refrigeration platform 10 and is used for secondary refrigeration.

[0035] When two refrigeration platforms 10 and two refrigeration devices are provided, the second compression component 5 on the first refrigeration device is connected to the first refrigeration platform 10 for secondary refrigeration; the second compression component 5 on the second refrigeration device is connected to the second refrigeration platform 10 for tertiary refrigeration.

[0036] When multiple refrigeration platforms 10 and multiple second refrigeration devices are provided, the multiple second refrigeration devices can perform multi-stage refrigeration.

[0037] In some embodiments, such as Fig. 1 As shown, the second compression component 5 includes a second housing 501, a second drive member 502, and a second piston 503. The second drive member 502 and the second piston 503 are located inside the second housing 501, and the second drive member 502 is used to drive the second piston 503 to do work. The second housing 501 is connected to the refrigeration platform 10. The second drive member 502 drives the second piston 503 to allow the pressurized fluid to enter the refrigeration platform 10, thereby avoiding the problem of energy waste.

[0038] The second housing 501 is connected to the refrigeration platform 10 via a connecting pipe, the diameter of which is smaller than that of the second housing 501. Because the second housing 501 has a larger diameter, it is not easy to connect to the refrigeration platform 10. The smaller diameter connecting pipe facilitates the connection between the second housing 501 and the refrigeration platform 10.

[0039] The second driving component 502 mentioned above can be a linear motor.

[0040] In some embodiments, the multi-stage refrigerator further includes a cold finger hot end 9, which is located on one side of the refrigeration platform 10; a second housing 501 passes through the cold finger hot end 9 and communicates with the refrigeration platform 10. At this time, the length of the second housing 501 can be greater than the distance from the cold finger hot end 9 to the refrigeration platform 10. Inside the second housing 501, a second driving member 502 drives a second piston 503 to allow the pressurized fluid to enter the refrigeration platform 10.

[0041] The second driving member 502 and the refrigeration platform 10 are distributed on both sides of the cold finger hot end 9, and the second driving member 502 is arranged on the side of the cold finger hot end 9 away from the refrigeration platform 10. Then, the second driving member 502 drives the second piston 503 to move, so that the second piston 503 gradually moves to the refrigeration platform 10, and the pressurized fluid enters the refrigeration platform 10. Since the second driving member 502 is arranged outside the cold finger hot end 9, the heat of the second driving member 502 does not interfere with the secondary refrigeration.

[0042] In some embodiments, as shown in Fig. 2 The multistage refrigeration machine further comprises the cold finger hot end 9 located on one side of the refrigeration platform 10, and the second compression component 5 is located between the cold finger hot end 9 and the refrigeration platform 10, which can save the occupied space of the second compression component 5 and has the advantage of facilitating assembly.

[0043] The second refrigeration device further comprises the second accumulator 6, the second refrigerator 7 and the second pipe body 8. The second accumulator 6 is communicated with the refrigeration platform 10, and the second accumulator 6 is connected with the second refrigerator 7 through the second pipe body 8. The arrangement of the second accumulator 6, the second refrigerator 7 and the second pipe body 8 can realize the transportation of the cold finger.

[0044] In addition, the multistage refrigeration machine further comprises the terminal refrigeration platform 11, and the terminal refrigeration platform 11 and the cold finger hot end 9 are distributed on both sides of the refrigeration platform 10. The second pipe body 8 is located inside the terminal refrigeration platform 11, and the terminal refrigeration platform 11 is used for terminal refrigeration.

[0045] The second refrigerator 7 is located between the refrigeration platform 10 and the terminal refrigeration platform 11, and the second refrigerator 7 is further connected with the second phase modulation mechanism 13.

[0046] The second compression device can realize the high-frequency reciprocating motion of the fluid and pressurize the fluid. After the fluid enters the second accumulator 6, the filler in the second accumulator 6 absorbs heat, thereby reducing the heat of the fluid. Then, the fluid with reduced heat flows to the second connecting pipe, and the temperature of the fluid is transmitted to the terminal refrigeration platform 11 through the second connecting pipe, which can be used for secondary refrigeration. At the same time, the arrangement of the second pulse tube and the second phase modulation mechanism 13 can feedback the pressure signal of the fluid.

[0047] When the refrigeration platform 10 and the second refrigeration device are both arranged one, the second compression component 5 on the second refrigeration device is communicated with the refrigeration platform 10, and the refrigeration platform 10 is communicated with the terminal refrigeration platform 11 through the second accumulator 6, thereby being used for secondary refrigeration.

[0048] When the refrigeration platform 10 and the second refrigeration device are both provided with two, the second compression component 5 on the first second refrigeration device is communicated with the first refrigeration platform 10, the refrigeration platform 10 is communicated with the first terminal refrigeration platform 11 through the second cold accumulator 6, so as to be used for two-stage refrigeration. The second compression component 5 on the second second refrigeration device is communicated with the second refrigeration platform 10, the second refrigeration platform 10 is communicated with the second terminal refrigeration platform 11 through the second cold accumulator 6 in the second second refrigeration device, so as to be used for three-stage refrigeration.

[0049] When the refrigeration platform 10 and the second refrigeration device are both provided with multiple, the multiple second refrigeration devices can perform multi-stage refrigeration.

[0050] In some embodiments, the first refrigeration device comprises a first compression device, a first cold accumulator 2, a first pulse tube and a first connecting tube, the first compression device is used for compressing gas, the first cold accumulator 2 is communicated with the first compressor, the first pulse tube is connected with the first cold accumulator 2 through the first connecting tube, and is used for one-stage refrigeration.

[0051] The first cold accumulator 2 and the first pulse tube are located between the cold finger hot end 9 and the refrigeration platform 10, the first connecting tube is located inside the refrigeration platform 10, and the first refrigeration device 3 is further connected with the first phase modulation mechanism 12.

[0052] The first compression device can make the fluid reciprocate at high frequency and pressurize the fluid; the filler in the first cold accumulator 2 absorbs heat after the fluid enters the first cold accumulator 2, so as to reduce the heat of the fluid; then the fluid flows to the first connecting tube, and the temperature of the fluid is transmitted to the refrigeration platform 10 through the first connecting tube, so as to perform one-stage refrigeration. The first pulse tube and the first phase modulation mechanism 12 can feedback the pressure signal of the fluid.

[0053] In addition, the first compression device comprises a first housing, a first driving member and a first piston 101, the first driving member and the first piston 101 are located inside the first housing, the first driving member is used for driving the first piston 101 to work, the first housing is communicated with the cold finger hot end 9, and the work of the first piston 101 driven by the first driving member directly enters the cold finger hot end 9, so as to perform one-stage refrigeration.

[0054] The length of the first piston 101 can be less than the length of the second piston 503.

[0055] The first driving member can be a linear motor.

[0056] In summary, the multi-stage refrigeration machine provided by the embodiments of the present disclosure comprises a first refrigeration device, at least one second refrigeration device, and at least one refrigeration platform 10. The first refrigeration device is used for primary refrigeration, and the second refrigeration device is used for at least secondary refrigeration. The second refrigeration device comprises a second compression component 5, and the refrigeration platform 10 is communicated with the second compression component 5. Since the refrigeration platform 10 is communicated with the second compression component 5, an excessive cold accumulator does not need to be separately arranged, and energy waste of the excessive cold accumulator is avoided.

[0057] It should be noted that, in this document, relational terms such as“first” and“second”, and the like, are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by“comprises... a” does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0058] The above merely provides specific embodiments of the present disclosure, enabling a person skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-stage refrigeration unit, characterized in that, include: A first refrigeration device, which is used for primary refrigeration; At least one second refrigeration device, the second refrigeration device being used for at least secondary refrigeration, the second refrigeration device including a second compression component (5). At least one refrigeration platform (10) is connected to the second compression component (5); The second compression component (5) includes a second housing (501), a second drive member (502), and a second piston (503). The second drive member (502) and the second piston (503) are located inside the second housing (501), and the second drive member (502) is used to drive the second piston (503) to do work. The second housing (501) is in communication with the refrigeration platform (10); The multi-stage refrigerator also includes a cold finger hot end (9), which is located on one side of the refrigeration platform (10); The second housing (501) penetrates the hot end of the cold finger (9) and communicates with the refrigeration platform (10); The second drive unit (502) and the refrigeration platform (10) are distributed on both sides of the hot end of the cold finger (9).

2. The multi-stage refrigeration unit according to claim 1, characterized in that, The number of the refrigeration platforms (10) is the same as the number of the second refrigeration devices.

3. The multi-stage refrigeration unit according to claim 1, characterized in that, The refrigeration platform (10) and the second refrigeration device are both provided in twos. The second compression component (5) on the first second refrigeration device is connected to the first refrigeration platform (10) and is used for secondary refrigeration. The second compression component (5) on the second second refrigeration device is connected to the second refrigeration platform (10) and is used for tertiary refrigeration.

4. The multi-stage refrigeration unit according to claim 1, characterized in that, The second housing (501) is connected to the refrigeration platform (10) through a connecting pipe, the diameter of which is smaller than the diameter of the second housing (501).

5. The multi-stage refrigeration unit according to claim 1, characterized in that, The second refrigeration device further includes a second cold storage unit (6), a second refrigeration unit (7), and a second pipe body (8). The second cold storage unit (6) is connected to the refrigeration platform (10), and the second cold storage unit (6) is connected to the second refrigeration unit (7) through the second pipe body (8).

6. The multi-stage refrigeration unit according to claim 5, characterized in that, The multi-stage refrigeration unit also includes a terminal refrigeration platform (11), and the terminal refrigeration platform (11) and the cold finger hot end (9) are distributed on both sides of the refrigeration platform (10); The second tube (8) is located inside the terminal cooling platform (11).

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