Novel refrigerating system

Abstract

The invention relates to a novel refrigerating system. The novel refrigerating system comprises a compressor, one side of the compressor is connected with an evaporator through a pipeline, the evaporator is connected with an expansion valve through a pipeline, the expansion valve is connected with a drying filter through a pipeline, the drying filter is connected with a condenser through a pipeline, and the condenser is connected with the compressor through a pipeline. By detecting the pressure values of the two positions, the limiting blocks in the two control rings on the movable column can be released only when the pressure values of the two positions are reduced to a certain value, and therefore it can be comprehensively judged that blockage is not caused but too much refrigerant is reduced, and misdiagnosis is avoided.

Description

Technical Field

[0001] The present invention belongs to the field of refrigeration systems, in particular to a new type of refrigeration system. Background Art

[0002] Existing refrigeration equipment is prone to refrigerant leakage during use, and usually requires manual addition, but often not in a timely manner, and there is a risk of misdiagnosing system pipe blockage as refrigerant leakage. Therefore, a new refrigeration system is proposed. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] In view of the following technical problems in the prior art: existing refrigeration equipment is prone to refrigerant leakage during use, which usually requires manual addition, but often not in a timely manner, and there is a possibility of misdiagnosis of system pipeline blockage as refrigerant leakage.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a novel refrigeration system, comprising a compressor, one side of the compressor is connected to an evaporator via a pipeline, the evaporator is connected to an expansion valve via a pipeline, the expansion valve is connected to a drier via a pipeline, the drier is connected to a condenser via a pipeline, and the condenser is connected to the compressor via a pipeline;

[0006] The compressor, evaporator, expansion valve, drying filter and condenser are arranged around the refrigerant adding mechanism. The refrigerant adding mechanism includes a switch assembly. The top end of the switch assembly is connected to the control mechanism and the bottom end is connected to the jacking mechanism.

[0007] As a preferred technical solution for a new refrigeration system, the switch assembly includes a switch platform, a gate, a communication groove and an elastic sealing gasket. One side of the switch assembly is connected to the pipeline between the evaporator and the expansion valve, and the other side of the switch assembly is connected to the liquid supply cylinder;

[0008] A control channel is provided in the switch platform, and a gate is movably connected to the control channel. An elastic sealing gasket is provided on both sides of the gate, and the elastic sealing gasket is movably connected to the control channel. A movable column is provided above the gate, and a through hole is recessed on both sides of the control channel. A connecting groove is recessed in the middle of the gate, and the connecting groove is movably connected to the through hole. The elastic sealing gasket is movably connected to the inner wall of the control channel.

[0009] As an optimal technical solution for a new type of refrigeration system, the jacking mechanism includes a push rod, a swing arm, an articulated seat, a roller and a sliding groove. The bottom of the control channel of the movable column is movably connected to the push rod, the bottom end of the push rod is rotatably connected to the roller, the push rod is movably abutted against the bottom end of the gate, one end of the swing arm is recessed with a sliding groove, the roller extends into the sliding groove, the articulated seat is rotatably connected to the swing arm, the articulated seat is connected to the third part of the swing arm, the other end of the swing arm is rotatably connected to a pressure detection cylinder, and the pressure detection cylinder is connected to the pipe between the condenser and the compressor;

[0010] When the refrigerant content in the refrigeration system rises to the maximum threshold, the push rod squeezes the gate, movable column and connecting seat, compresses the spring and moves upward, so that the through hole in the switch table is blocked by the elastic sealing gasket, thereby cutting off the refrigerant supply.

[0011] As an optimal technical solution for a new type of refrigeration system, the control mechanism includes a movable column, a connecting seat 2, a connecting seat 1, a movable cylinder and a spring 1. The bottom end of the movable cylinder is recessed with a movable groove, and the inside of the movable groove is movably plugged with a movable column. The bottom end of the movable column is rotatably connected to the connecting seat 1, and the bottom end of the movable column is rotatably connected to the connecting seat 2. The bottom end of the connecting seat 2 is connected to the gate. The spring 1 is arranged at the top of the movable groove, and the spring 1 is in contact with the connecting seat 1.

[0012] As an optimal technical solution for a new type of refrigeration system, the control mechanism also includes a control ring, a vertical channel, a second limiting side groove, a limiting block and a first limiting side groove. The outer periphery of the movable column is recessed with a vertical channel, the bottom of one side of the vertical channel is recessed with a first limiting side groove, and the bottom end of the other side is provided with a second limiting side groove. The bottom of the movable column is sleeved with two control rings, and a limiting block is arranged in the control ring. The limiting block is movably connected to the vertical channel, and a detection mechanism is connected to the control ring.

[0013] As a preferred technical solution for a new refrigeration system, the detection mechanism includes a connecting arm, a connecting port, a connecting sliding groove, and a second roller. The control ring is fixedly connected to the connecting arm, and the connecting port is recessed on the connecting arm. Connecting sliding grooves are recessed on both sides of the connecting port. The second roller is slidably connected in the connecting sliding groove. The middle part of the second roller is connected to a pressure detection cylinder, one of which is connected to the pipe between the evaporator and the expansion valve, and the other is connected to the pipe between the compressor and the condenser.

[0014] The connecting arm, the connecting port, the connecting sliding groove, the second roller and the control ring can convert the linear motion of the movable rod into the rotation of the control ring.

[0015] As an optimal technical solution for a new refrigeration system, a movable rod is provided on the pressure detection cylinder, and the inner cavity of the pressure detection cylinder is movably plugged with the movable rod. One end of the movable rod is rotatably connected to the second roller. The bottom end of the movable rod is provided with a piston 1, which is movably connected to the inner cavity of the pressure detection cylinder. The top end of the piston 1 is connected to a spring 2. The cavity on the lower side of the piston is connected to the pipeline between the evaporator and the expansion valve or the pipeline between the compressor and the condenser.

[0016] The pressure of the high-pressure gas flowing in the pipe between the compressor and the condenser is reduced to a certain value. Spring 2 squeezes piston 1 through the movable rod and roller 2 to pull the connecting arm to swing. The connecting arm brings the limit block in the control ring out of the limit side groove 1 and completely enters the vertical channel.

[0017] As an optimal technical solution for a new type of refrigeration system, a plurality of limiting frames are provided at the bottom end of the piston 1, and the limiting frames are stacked on each other;

[0018] The limiting frame prevents the piston from bottoming out and limits the travel of the movable rod, the piston and the control ring.

[0019] The beneficial effect of the novel refrigeration system of the present invention is that by detecting the pressure values ​​at two positions, only when the pressure at both positions drops to a certain value, the limit blocks in the two control rings on the movable column will release the restriction, so that it can be comprehensively determined that it is not a blockage but an excessive reduction of refrigerant, avoiding misdiagnosis;

[0020] Through the cooperation of two control rings and movable columns, and the use of pressure detection tubes, swing arms and push rods, active negative feedback adjustment is achieved, and refrigerant is automatically, promptly and efficiently added and replenished. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the movable rod of the present invention;

[0024] Figure 3 This is a schematic diagram of the connection structure between the control ring and the movable column of the present invention;

[0025] Figure 4 This is a schematic diagram of the internal structure of the pressure detection cylinder of the present invention;

[0026] Figure 5 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0027] Figure 6 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part B;

[0028] Figure 7 This is a structural schematic diagram of the connection relationship between the liquid supply cylinder and the high-pressure gas cylinder of the present invention.

[0029] Reference numerals: 1, compressor; 2, evaporator; 3, expansion valve; 4, filter drier; 5, condenser; 6, movable cylinder; 7, movable column; 9, swing arm; 10, hinged seat; 11, roller 1; 12, slide groove; 13, push rod; 14, straight channel; 15, pressure detection cylinder; 16, control ring; 17, vertical channel; 18, liquid supply cylinder; 19, three-way joint; 20, connecting pipe; 21, connecting seat 1; 22, Spring 1; 23. Limiting side groove 1; 24. Connecting seat 2; 25. Limiting block; 26. Connecting arm; 27. Connecting port; 28. Connecting sliding groove; 29. ​​Roller 2; 30. Movable rod; 31. Spring 2; 32. Piston 1; 33. Limiting frame; 35. Gate; 36. Connecting groove; 37. Elastic sealing gasket; 38. High-pressure gas cylinder; 39. Piston 2; 40. Liquid outlet tube; 41. Limiting side groove 2; 42. Switch table. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0033] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0034] like Figures 1 to 7 As shown, the present invention proposes a novel refrigeration system, including a compressor 1, one side of the compressor 1 is connected to an evaporator 2 through a pipeline, the evaporator 2 is connected to an expansion valve 3 through a pipeline, the expansion valve 3 is connected to a drying filter 4 through a pipeline, the drying filter 4 is connected to a condenser 5 through a pipeline, and the condenser 5 is connected to the compressor 1 through a pipeline;

[0035] The compressor 1, evaporator 2, expansion valve 3, filter drier 4 and condenser 5 are arranged around a refrigerant adding mechanism, which includes a switch assembly, the top of which is connected to a control mechanism and the bottom of which is connected to a jacking mechanism.

[0036] The switch assembly includes a switch platform 42, a gate 35, a communication groove 36 and an elastic sealing gasket 37. One side of the switch assembly is connected to the pipeline between the evaporator 2 and the expansion valve 3, and the other side of the switch assembly is connected to the liquid supply cylinder 18;

[0037] A control channel is provided in the switch platform 42, and a gate 35 is movably connected to the control channel. An elastic sealing gasket 37 is provided on both sides of the gate 35, and the elastic sealing gasket 37 is movably connected to the control channel. A movable column 7 is provided above the gate 35, and a through hole is recessed on both sides of the control channel. A connecting groove 36 is recessed in the middle of the gate 35, and the connecting groove 36 is movably connected to the through hole. The elastic sealing gasket 37 is movably connected to the inner wall of the control channel.

[0038] The jacking mechanism includes a push rod 13, a swing arm 9, an articulated seat 10, a roller 11 and a sliding groove 12. The bottom of the control channel of the movable column 7 is movably connected with the push rod 13. The bottom end of the push rod 13 is rotatably connected to the roller 11. The push rod 13 is movably abutted against the bottom end of the gate 35. One end of the swing arm 9 is recessed with a sliding groove 12. The roller 11 extends into the sliding groove 12. The articulated seat 10 is rotatably connected to the swing arm 9. The articulated seat 10 is connected to one-third of the swing arm 9. The other end of the swing arm 9 is rotatably connected to a pressure detection cylinder 15. The pressure detection cylinder 15 is connected to the pipeline between the condenser 5 and the compressor 1.

[0039] When the refrigerant content in the refrigeration system rises to the maximum threshold, the push rod 13 squeezes the gate 35, the movable column 7 and the connecting seat 21 to compress the spring 22 upward, so that the through hole in the switch table 42 is blocked by the elastic sealing gasket 37, thereby cutting off the supply of refrigerant.

[0040] The control mechanism includes a movable column 7, a second connecting seat 24, a first connecting seat 21, a movable cylinder 6 and a spring 22. A movable groove is recessed at the bottom end of the movable cylinder 6, and the movable column 7 is movably inserted into the inside of the movable groove. The bottom end of the movable column 7 is rotatably connected to the first connecting seat 21, and the bottom end of the movable column 7 is rotatably connected to the second connecting seat 24. The bottom end of the second connecting seat 24 is connected to the gate 35. The spring 22 is arranged at the top of the movable groove, and the spring 22 abuts against the first connecting seat 21.

[0041] The control mechanism also includes a control ring 16, a vertical channel 17, a limiting side groove 2 41, a limiting block 25 and a limiting side groove 1 23. The outer periphery of the movable column 7 is recessed with a vertical channel 17, the bottom of one side of the vertical channel 17 is recessed with a limiting side groove 1 23, and the bottom end of the other side is provided with a limiting side groove 2 41. The bottom of the movable column 7 is sleeved with two control rings 16, and a limiting block 25 is arranged in the control ring 16. The limiting block 25 is movably connected to the vertical channel 17, and a detection mechanism is connected to the control ring 16.

[0042] The detection mechanism includes a connecting arm 26, a connecting port 27, a connecting sliding groove 28, and a second roller 29. The control ring 16 is fixedly connected to the connecting arm 26, and the connecting port 27 is recessed on the connecting arm 26. The connecting port 27 is recessed on both sides of the connecting sliding groove 28. The second roller 29 is slidably connected in the connecting sliding groove 28. The middle part of the second roller 29 is connected to the pressure detection cylinder 15. One pressure detection cylinder 15 is connected to the pipeline between the evaporator 2 and the expansion valve 3, and the other pressure detection cylinder 15 is connected to the pipeline between the compressor 1 and the condenser 5.

[0043] The connecting arm 26 , the connecting port 27 , the connecting sliding groove 28 , the second roller 29 and the control ring 16 can convert the linear motion of the movable rod 30 into the rotation of the control ring 16 .

[0044] A movable rod 30 is provided on the pressure detection cylinder 15. The movable rod 30 is movably inserted into the inner cavity of the pressure detection cylinder 15. One end of the movable rod 30 is rotatably connected to the second roller 29. The bottom end of the movable rod 30 is provided with a piston 1 32. The piston 1 32 is movably connected to the inner cavity of the pressure detection cylinder 15. The top end of the piston 1 32 is connected to the second spring 31. The cavity on the lower side of the piston 1 32 is connected to the pipeline between the evaporator 2 and the expansion valve 3 or the pipeline between the compressor 1 and the condenser 5.

[0045] The pressure of the high-pressure gas flowing in the pipeline between the compressor 1 and the condenser 5 is reduced to a certain value. The spring 2 31 squeezes the piston 1 32 through the movable rod 30 and the roller 2 29 to pull the connecting arm 26 to swing. The connecting arm 26 and the limit block 25 in the control ring 16 are separated from the limit side groove 1 23 and completely enter the vertical channel 17.

[0046] The bottom end of the piston 1 32 is provided with a plurality of limiting frames 33, and the limiting frames 33 are stacked on each other;

[0047] The limiting frame 33 prevents the piston 1 32 from bottoming out, thereby limiting the travel of the movable rod 30 , the piston 1 32 and the control ring 16 .

[0048] A high-pressure gas cylinder 38 is provided on one side of the liquid supply cylinder 18. The bottom end of the high-pressure gas cylinder 38 is connected to the bottom end of the liquid supply cylinder 18 through a pipe. The inner cavity of the liquid supply cylinder 18 is slidably connected to a piston 2 39. The top of the liquid supply cylinder 18 is threadedly connected to the liquid discharge cylinder 40. The liquid discharge cylinder 40 is connected to the movable column 7 through a pipe. High-pressure gas is provided in the high-pressure gas cylinder 38. Refrigerant is accommodated above the piston 2 39, and high-pressure gas is provided below the piston 2 39.

[0049] During installation, the movable column 7, the pressure detection tube 15, the hinge seat 10 and the movable tube 6 are all fixedly connected to the machine body or the ground.

[0050] The springs in the three pressure detection cylinders 15 have different k-value coefficients;

[0051] The pressure detection tube 15 is connected to a three-way joint 19 through a connecting pipe 20 . The three-way joint 19 is provided on the pipe between the evaporator 2 and the expansion valve 3 or on the pipe between the compressor 1 and the condenser 5 .

[0052] The specific implementation method is as follows: low-pressure liquid flows in the pipe between the expansion valve 3 and the evaporator 2, and high-pressure gas flows in the pipe between the compressor 1 and the condenser 5. When the refrigerant in the refrigeration system is reduced to the lowest threshold, the pressure of the low-pressure liquid flowing in the pipe between the expansion valve 3 and the evaporator 2, and the pressure of the high-pressure gas flowing in the pipe between the compressor 1 and the condenser 5 are both reduced to a certain value, and the spring 2 31 squeezes the piston 1 32 through the movable rod 30 and the roller 2 29 to pull the connecting arm 26 to swing, and the connecting arm 26 and the limit block 25 in the control ring 16 are separated from the limit side groove 1 23 and completely enter the vertical channel 17, and the expansion valve 3 When the pressure of the low-pressure liquid flowing in the pipeline of the evaporator 2 drops to a certain value, the spring 2 31 squeezes the piston 1 32 through the movable rod 30 and the roller 2 29 to pull the connecting arm 26 to swing. The connecting arm 26 and the limit block 25 in the control ring 16 are separated from the limit side groove 2 41 and completely enter the vertical channel 17. The pressure at both positions drops to a certain value. It is comprehensively determined that it is not a blockage but an excessive reduction in refrigerant. At this time, since the limit block 25 is released from the obstruction of the movable column 7 through the limit side groove 2 41 or the limit side groove 1 23, the spring 1 22 can squeeze the movable column 7 downward, and the movable column 7 squeezes the gate 35 on the switch table 42. The refrigerant in the liquid supply cylinder 18 enters the pipe between the expansion valve 3 and the evaporator 2 through the two through holes on the liquid outlet cylinder 40 and the switch platform 42 to replenish the reduced refrigerant. When the refrigerant content in the refrigeration system rises to the maximum threshold, the pressure in the pipe between the condenser 5 and the compressor 1 also exceeds the minimum threshold pressure and reaches the maximum threshold pressure, the pressure detection cylinder 15 is sufficient to push the swing arm 9 to swing. The swing arm 9 amplifies the force through the lever principle, so that the swing arm 9 passes through the squeezing roller 11 and the push rod 13, and the push rod 13 moves upward, and the push rod 13 squeezes The gate 35, the movable column 7 and the connecting seat 1 21 compress the spring 1 22 upward, so that the through hole in the switch table 42 is blocked by the elastic sealing gasket 37, the refrigerant supply stops, and the movable column 7 rises to the highest point. The pressure of the low-pressure liquid flowing in the pipe between the expansion valve 3 and the evaporator 2, and the pressure of the high-pressure gas flowing in the pipe between the compressor 1 and the condenser 5 have long exceeded a certain value. The spring 2 31 is compressed, the movable rod 30 and the roller 2 29 push the connecting arm 26 to swing, and the connecting arm 26 brings the limit block 25 in the control ring 16 into the limit side groove 2 41 or the limit side groove 1 23, so that the position of the movable column 7 is locked again.

[0053] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A new refrigeration system, characterized by: The invention comprises a compressor (1), wherein one side of the compressor (1) is connected to an evaporator (2) via a pipeline, the evaporator (2) is connected to an expansion valve (3) via a pipeline, the expansion valve (3) is connected to a drying filter (4) via a pipeline, the drying filter (4) is connected to a condenser (5) via a pipeline, and the condenser (5) is connected to the compressor (1) via a pipeline; The compressor (1), the evaporator (2), the expansion valve (3), the filter drier (4) and the condenser (5) are arranged around a refrigerant adding mechanism, wherein the refrigerant adding mechanism comprises a switch assembly, wherein the top end of the switch assembly is connected to a control mechanism and the bottom end is connected to a jacking mechanism.

2. A novel refrigeration system according to claim 1, characterized in that: The switch assembly includes a switch platform (42), a gate (35), a communication groove (36) and an elastic sealing gasket (37). One side of the switch assembly is connected to the pipeline between the evaporator (2) and the expansion valve (3), and the other side of the switch assembly is connected to the liquid supply cylinder (18). A control channel is provided in the switch platform (42), and a gate (35) is movably connected to the control channel. An elastic sealing gasket (37) is provided on both sides of the gate (35), and the elastic sealing gasket (37) is movably connected to the control channel. A movable column (7) is provided above the gate (35), and a through hole is recessed on both sides of the control channel. A connecting groove (36) is recessed in the middle of the gate (35), and the connecting groove (36) is movably connected to the through hole. The elastic sealing gasket (37) is movably connected to the inner wall of the control channel.

3. A novel refrigeration system according to claim 2, characterized in that: The jacking mechanism comprises a jack (13), a swing arm (9), an articulated seat (10), a roller (11) and a sliding groove (12); the bottom of the control channel of the movable column (7) is movably connected with the jack (13); the bottom end of the jack (13) is rotatably connected with the roller (11); the jack (13) is movably abutted against the bottom end of the gate (35); one end of the swing arm (9) is recessed with a sliding groove (12); the roller (11) extends into the sliding groove (12); the articulated seat (10) is rotatably connected to the swing arm (9); the articulated seat (10) is connected to one-third of the swing arm (9); the other end of the swing arm (9) is rotatably connected with a pressure detection tube (15); the pressure detection tube (15) is connected to the pipeline between the condenser (5) and the compressor (1).

4. A novel refrigeration system according to claim 2, characterized in that: The control mechanism comprises a movable column (7), a second connecting seat (24), a first connecting seat (21), a movable cylinder (6) and a first spring (22). The bottom end of the movable cylinder (6) is recessed with a movable groove, and the movable column (7) is movably inserted into the interior of the movable groove. The bottom end of the movable column (7) is rotatably connected to the first connecting seat (21), and the bottom end of the movable column (7) is rotatably connected to the second connecting seat (24). The bottom end of the second connecting seat (24) is connected to the gate (35). The first spring (22) is arranged at the top of the movable groove, and the first spring (22) abuts against the first connecting seat (21).

5. A novel refrigeration system according to claim 4, characterized in that: The control mechanism further comprises a control ring (16), a vertical channel (17), a second limiting side groove (41), a limiting block (25) and a first limiting side groove (23). The outer periphery of the movable column (7) is recessed with the vertical channel (17). The bottom of one side of the vertical channel (17) is recessed with the first limiting side groove (23), and the bottom end of the other side is provided with the second limiting side groove (41). The bottom of the movable column (7) is sleeved with two control rings (16). A limiting block (25) is provided in the control ring (16). The limiting block (25) is movably connected to the vertical channel (17). The control ring (16) is connected with a detection mechanism.

6. A novel refrigeration system according to claim 5, characterized in that: The detection mechanism comprises a connecting arm (26), a connecting port (27), a connecting sliding groove (28) and a second roller (29). The control ring (16) is fixedly connected with the connecting arm (26), the connecting port (27) is recessed on the connecting arm (26), the connecting sliding grooves (28) are recessed on both sides of the connecting port (27), the second roller (29) is slidably connected in the connecting sliding groove (28), the middle part of the second roller (29) is connected to the pressure detection tube (15), one of the pressure detection tubes (15) is connected to the pipeline between the evaporator (2) and the expansion valve (3), and the other pressure detection tube (15) is connected to the pipeline between the compressor (1) and the condenser (5).

7. A novel refrigeration system according to claim 1, characterized in that: A movable rod (30) is provided on the pressure detection tube (15), and the movable rod (30) is movably inserted into the inner cavity of the pressure detection tube (15). One end of the movable rod (30) is rotatably connected to the second roller (29). A piston (32) is provided at the bottom end of the movable rod (30), and the piston (32) is movably connected to the inner cavity of the pressure detection tube (15). The top end of the piston (32) is connected to the second spring (31). The cavity on the lower side of the piston (32) is connected to the pipeline between the evaporator (2) and the expansion valve (3) or the pipeline between the compressor (1) and the condenser (5).

8. A novel refrigeration system according to claim 7, characterized in that: The bottom end of the piston 1 (32) is provided with a plurality of limiting frames (33), and the limiting frames (33) are stacked on each other.

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