Expansion valve for refrigeration system

Abstract

The invention discloses a refrigeration system expansion valve, which relates to the technical field of refrigeration systems, and comprises a refrigerant cylinder, wherein the upper end surface of the refrigerant cylinder is fixedly connected to a cold air cylinder, the upper end inner wall of the refrigerant cylinder is fixedly connected to a partition plate 1, the upper end surface of the cold air cylinder is fixedly connected to a connecting sleeve, the inner wall of the cold air cylinder is fixedly connected to a partition plate 2, a driving component is arranged in the connecting sleeve, a recovery component is arranged at the lower end of the refrigerant cylinder, an opening enlarging component is arranged in the refrigerant cylinder, and is used to speed up the control of the flow rate of the refrigerant in the refrigerant cylinder, a prompting component is arranged below the cold air cylinder, and is used to prompt the opening and closing status of the refrigeration system expansion valve, and an adjusting component is arranged below the refrigerant cylinder, and is used to adjust the recovery effect of the recovery component, so as to solve the problem that when the flow rate of the refrigerant is controlled by blocking the flow port end with a plug, the adjustment speed is slow, the adjustment range is limited, and the use effect of the expansion valve is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration system expansion valves, in particular to a refrigeration system expansion valve. Background Art

[0002] The expansion valve is an important component in the refrigeration system and heat pump drying system. Taking the refrigeration system as an example, the expansion valve is used to throttle the high-temperature, high-pressure liquid refrigerant in the refrigeration system into low-temperature, low-pressure wet steam, and then the refrigerant enters the evaporator to absorb heat to achieve the refrigeration effect.

[0003] In the refrigeration system, the expansion valve precisely controls the flow of refrigerant to ensure that the refrigerant in the evaporator can fully evaporate and absorb heat, thereby achieving the cooling effect. At the same time, it can also prevent liquid refrigerant from directly entering the compressor and protect the compressor from liquid hammer damage. In addition, the expansion valve can automatically adjust the flow of refrigerant according to changes in refrigeration load, thereby improving the energy efficiency and operational stability of the refrigeration system.

[0004] Nowadays, expansion valves control the refrigerant flow by blocking the flow port with a plug. This method can only be adjusted by controlling the position of the plug. The adjustment speed is slow and the adjustment range is limited, which reduces the use effect of the expansion valve. Summary of the invention

[0005] The object of the present invention is to provide a refrigeration system expansion valve, which solves the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a refrigeration system expansion valve, comprising a refrigerant cylinder, the upper end surface of the refrigerant cylinder is fixedly connected to a cold air cylinder, the upper inner wall of the refrigerant cylinder is fixedly connected to a partition plate 1, the upper end surface of the cold air cylinder is fixedly connected to a connecting sleeve, the inner wall of the cold air cylinder is fixedly connected to a partition plate 2, the upper inner wall of the cold air cylinder is fixedly connected to a partition plate 3, a driving component is arranged in the connecting sleeve, and a recovery component is arranged at the lower end of the refrigerant cylinder, and the refrigeration system expansion valve also includes:

[0007] An opening enlarging component, the opening enlarging component is arranged in the refrigerant cylinder and is used to speed up the control of the refrigerant flow rate in the refrigerant cylinder;

[0008] A prompting component, which is arranged below the cold air cylinder and is used to prompt the opening and closing status of the expansion valve of the refrigeration system;

[0009] An adjusting component is arranged below the refrigerant cylinder and is used to adjust the restoring effect of the restoring component.

[0010] Optionally, the driving component includes:

[0011] A controller housing, wherein the lower end surface of the controller housing is fixedly connected to the upper end surface of the connecting sleeve, an iron sheet is fixedly connected to the inner wall of the controller housing, a temperature controller is arranged above the iron sheet, the housing of the temperature controller is fixedly connected to the inner upper end surface of the controller housing, the lower end surface of the iron sheet is fixedly connected to a connecting rod, and the lower end surface of the connecting rod is fixedly connected to a blocking ball.

[0012] Optionally, the recovery component includes:

[0013] A fixed block, the upper end surface of the fixed block abuts against the outer surface of the blocking ball, the lower end surface of the fixed block is fixedly connected to a spring 1, the lower end of the spring 1 is fixedly connected to a sliding plate, and the surface of the sliding plate is slidably connected to the lower end inner wall of the refrigerant cylinder.

[0014] Optionally, the opening enlarging component includes:

[0015] A fixing ring, the outer surface of which is fixedly connected to the inner wall of the upper end of the refrigerant cylinder, the upper end surface of the fixing ring is provided with a hexagonal groove, the groove wall of the hexagonal groove is slidably connected with a sliding block, the upper end surface of the sliding block is fixedly connected with a baffle, the upper end surface of the baffle is fixedly connected with a sliding column, the surface of the sliding column is slidably connected with a sliding frame, the outer surface of the sliding frame is slidably connected with a rotating ring, the lower end surface of the rotating ring is rotatably connected to the upper end surface of the fixing ring, the outer surface of the rotating ring is rotatably connected to the inner wall of the upper end surface of the refrigerant cylinder, and the surface of the baffle abuts against the surface of the blocking ball.

[0016] Optionally, the opening enlarging component further includes:

[0017] An arc-shaped plate, wherein a sliding groove is provided on the inner wall of the arc-shaped surface of the arc-shaped plate, the upper end of the sliding groove is vertically arranged, and the lower end of the sliding groove is spirally arranged, the lower end surface of the arc-shaped plate is fixedly connected to the upper end surface of the rotating ring, and the groove wall of the sliding groove is slidably connected to a toggle column, and the end surface of the toggle column is fixedly connected to the lower end surface of the connecting rod.

[0018] Optionally, the surface of the connecting rod slides through the upper end surface of the partition plate 1, the surface of the connecting rod slides through the upper end surface of the partition plate 2, and the surface of the connecting rod slides through the upper end surface of the partition plate 3;

[0019] The interior of the refrigerant cylinder is fixedly connected with a connecting pipe 1, the interior of the refrigerant cylinder is also fixedly connected with a connecting pipe 2, the inner wall of the cold air cylinder is fixedly connected with a connecting pipe 3, and the inner wall of the cold air cylinder is fixedly connected with a connecting pipe 4.

[0020] Optionally, the prompt component includes:

[0021] A step platform, wherein the end surface of the step platform is provided with a through slot, the slot wall of the slot is fixedly connected to the surface of the connecting rod, and the upper end surface of the step platform is in contact with the lower end surface of the second partition, the inclined surface of the step platform is rollingly connected to a roller, the end surface of the roller is rotatably connected to a sliding frame, the lower end surface of the sliding frame is slidably connected to the upper end surface of the first partition, the upper end surface of the first partition is also fixedly connected to a sliding frame, and the inner wall of the sliding frame is slidably connected to the surface of the sliding frame;

[0022] A reminder rod, a reminder groove penetrating into the interior is provided on the lower end surface of the partition plate 2 in the air cooler, the groove wall of the reminder groove is slidably connected to the surface of the reminder rod, the end face of the reminder rod is fixedly connected to the surface of the sliding frame, and the surface of the sliding frame is also fixedly connected to a spring 2, and one end of the spring 2 away from the sliding frame is fixedly connected to the inner wall of the air cooler.

[0023] Optionally, the adjustment component includes:

[0024] A threaded column, the upper end surface of the threaded column is rotatably connected to the lower end surface of the sliding plate, the threaded surface of the threaded column is threadedly connected with a nut, and the upper end surface of the nut is fixedly connected to the outer lower end surface of the refrigerant cylinder.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. In the process of the blocking ball moving downward by the connecting rod moving downward, the present invention opens the expansion valve and drives the fixed block to move downward. At the same time, the spring 1 is squeezed, so that the spring 1 has elastic deformation, thereby providing resistance for the movement of the blocking ball, thereby making the blocking ball more difficult to move, thereby making the moving position more precise, and when the connecting rod moves upward to drive the blocking ball to move upward to close the expansion valve, the blocking ball can move upward faster under the action of the squeezed spring 1, thereby increasing the position change speed of the blocking ball during the movement process, thereby improving the actual use effect of the expansion valve.

[0027] 2. The present invention further increases the size of the entrance opening of the refrigerant cylinder entrance end by opening the diameter between the six baffles when the blocking ball moves downward to open the expansion valve, and shrinks the diameter between the six baffles when the blocking ball moves upward to close the expansion valve, so that the blocking ball can be against the baffles when moving upward, thereby closing the expansion valve, thereby improving the adjustment speed and adjustment range of the expansion valve during use, and making the use effect of the expansion valve better.

[0028] 3. The present invention indicates the opening and closing state of the expansion valve by observing whether the prompt rod is externally placed, and the changes of the valve body that cannot be seen inside are reflected through the displayable prompt rod, thereby further improving the convenience of the staff in repairing the expansion valve.

[0029] Fourth, the present invention can control the position of the sliding plate by rotating the threaded column, and further can control the tightness of the spring 1 to solve the problem of fatigue of the spring 1, and further increase the service life of the expansion valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view of the structure of the present invention;

[0031] Figure 2 A cross-sectional view of the internal structure of the refrigerant cylinder in the structure of the present invention;

[0032] Figure 3 It is an enlarged view of the structure of the components in the present invention;

[0033] Figure 4 It is an enlarged cross-sectional view of the internal structure of the refrigerant cylinder in the present invention;

[0034] Figure 5 For the present invention Figure 4 A magnified view of the structure at inner A;

[0035] Figure 6 It is an enlarged view of the sliding groove structure in the present invention;

[0036] Figure 7 It is an enlarged view of the connection structure between the sliding groove and the toggle column in the present invention;

[0037] Figure 8 A top view of the opening enlargement component structure of the present invention;

[0038] Fig. 9 It is an enlarged view of the hexagonal groove structure in the present invention.

[0039] In the figure: 1, refrigerant cylinder; 2, air conditioning cylinder; 3, connecting pipe four; 4, controller housing; 5, connecting sleeve; 6, connecting pipe three; 7, prompt groove; 8, connecting pipe one; 9, connecting pipe two; 10, partition one; 11, ladder; 12, partition two; 13, partition three; 14, connecting rod; 15, iron sheet; 16, temperature controller; 17, roller; 18, sliding frame; 19, spring two; 20, prompt rod; 21, sliding frame two; 22, blocking ball; 23, fixed block; 24, spring one; 25, sliding plate; 26, nut; 27, threaded column; 28, fixing ring; 29, baffle; 30, sliding groove; 31, arc plate; 32, rotating ring; 33, toggle column; 34, sliding column; 35, sliding frame; 36, hexagonal groove. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] For example, see Figures 1 to 9 The present embodiment provides a technical solution: a refrigeration system expansion valve, comprising a refrigerant cylinder 1, the upper end surface of the refrigerant cylinder 1 is fixedly connected to a cold air cylinder 2, the upper inner wall of the refrigerant cylinder 1 is fixedly connected to a partition 10, the upper end surface of the cold air cylinder 2 is fixedly connected to a connecting sleeve 5, the inner wall of the cold air cylinder 2 is fixedly connected to a partition 2 12, and the upper inner wall of the cold air cylinder 2 is fixedly connected to a partition 3 13;

[0042] The surface of the connecting rod 14 slides through the upper end surface of the partition 10, the surface of the connecting rod 14 slides through the upper end surface of the partition 2 12, and the surface of the connecting rod 14 also slides through the upper end surface of the partition 3 13;

[0043] The interior of the refrigerant cylinder 1 is fixedly connected with a connecting pipe 1 8 , the interior of the refrigerant cylinder 1 is also fixedly connected with a connecting pipe 2 9 , the inner wall of the cold air cylinder 2 is fixedly connected with a connecting pipe 3 6 , and the inner wall of the cold air cylinder 2 is fixedly connected with a connecting pipe 4 3 .

[0044] A driving assembly is arranged in the connecting sleeve 5, and the driving assembly includes:

[0045] The controller housing 4 has a lower end surface fixedly connected to the upper end surface of the connecting sleeve 5, an iron sheet 15 is fixedly connected to the inner wall of the controller housing 4, a temperature controller 16 is arranged above the iron sheet 15, a housing of the temperature controller 16 is fixedly connected to the inner upper end surface of the controller housing 4, a connecting rod 14 is fixedly connected to the lower end surface of the iron sheet 15, and a blocking ball 22 is fixedly connected to the lower end surface of the connecting rod 14.

[0046] More specifically, in this embodiment: when using the expansion valve, firstly, the connection pipe 1 8, the connection pipe 2 9, the connection pipe 3 6 and the connection pipe 4 3 are connected to the refrigeration system, and then the temperature controller 16 in the controller housing 4 is connected to the refrigeration system, and the temperature controller 16 is used to reflect the temperature change in the refrigeration system, and then the temperature controller 16 is used to control the bending of the iron sheet 15, and then the up and down movement of the connecting rod 14 is controlled to control the position of the blocking ball 22, and further to control the opening and closing size of the expansion valve;

[0047] The setting of the drive assembly controls the bending of the iron sheet 15 by using the temperature controller 16, and then controls the up and down movement of the connecting rod 14 to control the position of the blocking ball 22, and further controls the opening and closing size of the expansion valve, thereby making the use of the expansion valve intelligent and precise.

[0048] It is worth noting that the present embodiment also includes: a recovery component is provided at the lower end of the refrigerant cylinder 1, and the recovery component includes:

[0049] The fixed block 23 has its upper end surface in contact with the outer surface of the blocking ball 22, and its lower end surface is fixedly connected with a spring 24, and its lower end is fixedly connected with a sliding plate 25, and its surface is slidably connected with the inner wall of the lower end of the refrigerant cylinder 1.

[0050] More specifically, in the present embodiment: in the process of controlling the position of the blocking ball 22 and thus controlling the opening and closing size of the expansion valve by controlling the up and down movement of the connecting rod 14, when the connecting rod 14 moves downward to drive the blocking ball 22 to move downward, the expansion valve will be opened, and the fixing block 23 will be driven to move downward, and at the same time, the spring 1 24 will be squeezed, so that the spring 1 24 has elastic deformation, thereby providing resistance for the movement of the blocking ball 22, thereby making the blocking ball 22 more difficult in the process of moving, thereby making the moving position more accurate, and at the same time, when the connecting rod 14 moves upward to drive the blocking ball 22 to move upward to close the expansion valve, under the action of the spring 1 24, the blocking ball 22 can move upward faster, thereby increasing the position change speed of the blocking ball 22 during the movement process, thereby improving the actual use effect of the expansion valve;

[0051] The setting of the restoration component opens the expansion valve and drives the fixing block 23 to move downward when the connecting rod 14 moves downward, and at the same time, the spring 24 is squeezed, so that the spring 24 has elastic deformation, thereby providing resistance for the movement of the blocking ball 22, thereby making it more difficult for the blocking ball 22 to move, thereby making the moving position more precise, and when the connecting rod 14 moves upward to drive the blocking ball 22 to move upward to close the expansion valve, the blocking ball 22 can move upward faster under the action of the squeezed spring 24, thereby increasing the position change speed of the blocking ball 22 during the movement, thereby improving the actual use effect of the expansion valve.

[0052] Embodiment 2, based on the above embodiment:

[0053] See also Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 In this embodiment, it includes: an opening expansion component, the opening expansion component is arranged in the refrigerant cylinder 1, and the opening expansion component includes:

[0054] A fixed ring 28, the outer surface of the fixed ring 28 is fixedly connected to the inner wall of the upper end of the refrigerant cylinder 1, the upper end surface of the fixed ring 28 is provided with a hexagonal groove 36, the groove wall of the hexagonal groove 36 is slidably connected with a sliding block, the upper end surface of the sliding block is fixedly connected with a baffle 29, the upper end surface of the baffle 29 is fixedly connected with a sliding column 34, the surface of the sliding column 34 is slidably connected with a sliding frame 35, the outer surface of the sliding frame 35 is slidably connected with a rotating ring 32, the lower end surface of the rotating ring 32 is rotatably connected to the upper end surface of the fixed ring 28, the outer surface of the rotating ring 32 is rotatably connected to the inner wall of the upper end surface of the refrigerant cylinder 1, and the surface of the baffle 29 abuts against the surface of the blocking ball 22;

[0055] The arc-shaped plate 31 has an inner wall of the arc-shaped surface on which a sliding groove 30 is provided. The upper end of the sliding groove 30 is vertically arranged, and the lower end of the sliding groove 30 is spirally arranged. The lower end surface of the arc-shaped plate 31 is fixedly connected to the upper end surface of the rotating ring 32. The groove wall of the sliding groove 30 is slidably connected to a toggle column 33, and the end surface of the toggle column 33 is fixedly connected to the lower end surface of the connecting rod 14.

[0056] More specifically, in this embodiment, the blocking ball 22 is driven to move up and down by the movement of the connecting rod 14, and the toggle column 33 is driven to slide in the sliding groove 30 provided on the inner arc surface of the arc plate 31, and then the arc plate 31 is driven to rotate with the connecting rod 14, further making the expansion valve have the following two motion states:

[0057] First, when the connecting rod 14 drives the toggle column 33 to slide downward in the sliding groove 30 provided on the inner arc surface of the arc plate 31, the arc plate 31 will be driven to rotate clockwise with the connecting rod 14 as the axis, and the rotating ring 32 will be further driven to rotate clockwise, thereby driving the sliding column 34 to slide in the sliding frame 35, and then driving the sliding block to slide in the hexagonal groove 36, so that the diameter between the six baffles 29 is opened, and the size of the entrance opening of the entrance end of the refrigerant cylinder 1 is further increased;

[0058] Second, when the connecting rod 14 drives the toggle column 33 to slide upward in the sliding groove 30 provided on the inner arc surface of the arc plate 31, the arc plate 31 will be driven to rotate counterclockwise with the connecting rod 14 as the axis, and the rotating ring 32 will be further driven to rotate counterclockwise, thereby driving the sliding column 34 to slide in the sliding frame 35, and then driving the sliding block to slide in the hexagonal groove 36, so that the diameter between the six baffles 29 is contracted, and then the blocking ball 22 can be against the baffle 29 when moving upward, thereby closing the expansion valve;

[0059] The setting of the opening enlargement component further increases the size of the entrance opening of the entrance end of the refrigerant cylinder 1 by opening the diameter between the six baffles 29 when the blocking ball 22 moves downward to open the expansion valve, and when the blocking ball 22 moves upward to close the expansion valve, the diameter between the six baffles 29 shrinks, so that the blocking ball 22 can be against the baffle 29 when moving upward, thereby closing the expansion valve, thereby improving the adjustment speed and adjustment range of the expansion valve during use, so that the use effect of the expansion valve is better.

[0060] Embodiment 3, based on the above embodiment:

[0061] See also Figure 1 , Figure 2 and Figure 3 In this embodiment, it also includes: a prompt component, which is arranged below the cold air cylinder 2, and the prompt component includes:

[0062] The step platform 11 has an end surface with a through slot, the slot wall of the slot is fixedly connected to the surface of the connecting rod 14, and the upper end surface of the step platform 11 is in contact with the lower end surface of the partition 12. The inclined surface of the step platform 11 is rollingly connected to a roller 17, and the end surface of the roller 17 is rotatably connected to a sliding frame 18, and the lower end surface of the sliding frame 18 is slidably connected to the upper end surface of the partition 10. The upper end surface of the partition 10 is also fixedly connected to a sliding frame 21, and the inner wall of the sliding frame 21 is slidably connected to the surface of the sliding frame 18;

[0063] A reminder rod 20 and a reminder groove 7 penetrating into the interior are provided on the lower end surface of the partition 12 of the air cooler 2. The groove wall of the reminder groove 7 is slidably connected to the surface of the reminder rod 20. The end face of the reminder rod 20 is fixedly connected to the surface of the sliding frame 18. The surface of the sliding frame 18 is also fixedly connected to a spring 19. The end of the spring 19 away from the sliding frame 18 is fixedly connected to the inner wall of the air cooler 2.

[0064] More specifically, in this embodiment, when the connecting rod 14 moves downward and drives the ladder 11 to move downward, the second partition 12 is driven to move toward the inner wall end of the lower air cooler 2, so that the prompt rod 20 is inserted from the prompt groove 7, and further the user is prompted that the expansion valve is in the open state. When the connecting rod 14 moves upward to close the expansion valve, the prompt rod 20 is restored under the action of the second spring 19. When the prompt rod 20 is not visible from the outside, it means that the expansion valve is in the closed state.

[0065] The setting of the prompt component can prompt the opening and closing status of the expansion valve by observing whether the prompt rod 20 is externally placed, and the changes of the valve body that cannot be seen inside are reflected through the displayable prompt rod 20, which further improves the convenience of the staff in repairing the expansion valve.

[0066] Embodiment 4, based on the above embodiment:

[0067] See also Figure 1 , Figure 2 , Figure 4 and Figure 7 In this embodiment, it also includes: an adjustment component, which is arranged below the refrigerant cylinder 1 and includes:

[0068] The threaded column 27 has its upper end surface rotatably connected to the lower end surface of the sliding plate 25 , and the threaded surface of the threaded column 27 is threadedly connected to a nut 26 , and the upper end surface of the nut 26 is fixedly connected to the outer lower end surface of the refrigerant cylinder 1 .

[0069] More specifically, in this embodiment: the position of the sliding plate 25 can be controlled by rotating the threaded column 27, and further the tightness of the spring 24 can be controlled, so that when the expansion valve is used for a long time and the spring 24 becomes fatigued, the tightness of the spring 24 can be adjusted to keep the spring 24 in a relatively sensitive use environment, further improving the service life of the expansion valve;

[0070] The arrangement of the adjustment assembly can control the position of the sliding plate 25 by rotating the threaded column 27, and further can control the tightness of the spring 24 to solve the problem of fatigue of the spring 24, and further improve the service life of the expansion valve.

[0071] Working principle: When this type of refrigeration system expansion valve is used, the following steps are performed:

[0072] S1: When using the expansion valve, first connect it to the refrigeration system through the connecting pipe 1 8, the connecting pipe 2 9, the connecting pipe 3 6 and the connecting pipe 4 3, and then connect the temperature controller 16 in the controller housing 4 to the refrigeration system;

[0073] S2: The temperature change in the refrigeration system is reflected by the temperature controller 16, and the bending of the iron sheet 15 is controlled by the temperature controller 16 to further control the opening and closing of the expansion valve;

[0074] S3: When the connecting rod 14 moves downward and drives the blocking ball 22 to move downward, the expansion valve is opened and the diameter between the six baffles 29 is opened, further increasing the size of the entrance opening of the entrance end of the refrigerant cylinder 1;

[0075] S4: When the connecting rod 14 moves downward and drives the blocking ball 22 to move upward, the diameter between the six blocking pieces 29 shrinks, so that the blocking ball 22 can abut against the blocking piece 29 when moving upward, thereby closing the expansion valve;

[0076] S5: When the connecting rod 14 moves downward to drive the platform 11 to move downward, the prompt rod 20 is inserted from the prompt slot 7, so as to further prompt the user that the expansion valve is in an open state. On the contrary, when the connecting rod 14 moves upward to close the expansion valve, the prompt rod 20 is restored, thereby prompting the user of the valve opening and closing state.

[0077] S6; Finally, in the state of long-term use, the tightness of the spring 24 is adjusted to make the spring 24 continue to be in a more sensitive use environment, further improving the service life of the expansion valve.

[0078] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A refrigeration system expansion valve, comprising a refrigerant cylinder (1), characterized in that: The upper end surface of the refrigerant cylinder (1) is fixedly connected to the cold air cylinder (2), the upper inner wall of the refrigerant cylinder (1) is fixedly connected to a partition plate 1 (10), the upper end surface of the cold air cylinder (2) is fixedly connected to a connecting sleeve (5), the inner wall of the cold air cylinder (2) is fixedly connected to a partition plate 2 (12), the upper inner wall of the cold air cylinder (2) is fixedly connected to a partition plate 3 (13), a driving component is arranged in the connecting sleeve (5), and a recovery component is arranged at the lower end of the refrigerant cylinder (1). The refrigeration system expansion valve further comprises: An opening enlarging component, the opening enlarging component being arranged in the refrigerant cylinder (1) and used to accelerate the control of the flow rate of the refrigerant in the refrigerant cylinder (1); A prompting component, the prompting component is arranged below the cold air cylinder (2) and is used to prompt the opening and closing status of the expansion valve of the refrigeration system; An adjusting component, the adjusting component being arranged below the refrigerant cylinder (1) and being used to adjust the recovery effect of the recovery component; The drive assembly comprises: A controller housing (4), wherein the lower end surface of the controller housing (4) is fixedly connected to the upper end surface of the connecting sleeve (5), an iron sheet (15) is fixedly connected to the inner wall of the controller housing (4), a temperature controller (16) is arranged above the iron sheet (15), the housing of the temperature controller (16) is fixedly connected to the inner upper end surface of the controller housing (4), the lower end surface of the iron sheet (15) is fixedly connected to a connecting rod (14), and the lower end surface of the connecting rod (14) is fixedly connected to a blocking ball (22); The recovery component includes: A fixed block (23), wherein the upper end surface of the fixed block (23) abuts against the outer surface of the blocking ball (22), the lower end surface of the fixed block (23) is fixedly connected to a spring 1 (24), the lower end of the spring 1 (24) is fixedly connected to a sliding plate (25), and the surface of the sliding plate (25) is slidably connected to the inner wall of the lower end of the refrigerant cylinder (1); The opening enlarging component comprises: A fixed ring (28), the outer surface of the fixed ring (28) being fixedly connected to the inner wall of the upper end of the refrigerant cylinder (1), the upper end surface of the fixed ring (28) being provided with a hexagonal groove (36), the groove wall of the hexagonal groove (36) being slidably connected to a sliding block, the upper end surface of the sliding block being fixedly connected to a baffle (29), the upper end surface of the baffle (29) being fixedly connected to a sliding column (34), the surface of the sliding column (34) being slidably connected to a sliding frame (35), the outer surface of the sliding frame (35) being slidably connected to a rotating ring (32), the lower end surface of the rotating ring (32) being rotatably connected to the upper end surface of the fixed ring (28), the outer surface of the rotating ring (32) being rotatably connected to the inner wall of the upper end surface of the refrigerant cylinder (1), and the surface of the baffle (29) being in contact with the surface of the blocking ball (22); The opening enlarging component also includes: An arc-shaped plate (31), wherein a sliding groove (30) is provided on the inner wall of the arc-shaped surface of the arc-shaped plate (31), the upper end of the sliding groove (30) is vertically arranged, and the lower end of the sliding groove (30) is spirally arranged, the lower end surface of the arc-shaped plate (31) is fixedly connected to the upper end surface of the rotating ring (32), and the groove wall of the sliding groove (30) is slidably connected to a toggle column (33), and the end surface of the toggle column (33) is fixedly connected to the lower end surface of the connecting rod (14); The surface of the connecting rod (14) slides through the upper end surface of the partition plate 1 (10), the surface of the connecting rod (14) slides through the upper end surface of the partition plate 2 (12), and the surface of the connecting rod (14) slides through the upper end surface of the partition plate 3 (13); The interior of the refrigerant cylinder (1) is fixedly connected to a connecting pipe 1 (8), the interior of the refrigerant cylinder (1) is also fixedly connected to a connecting pipe 2 (9), the inner wall of the cold air cylinder (2) is fixedly connected to a connecting pipe 3 (6), and the inner wall of the cold air cylinder (2) is fixedly connected to a connecting pipe 4 (3); The prompt component includes: A step platform (11), wherein an end surface of the step platform (11) is provided with a through slot, the slot wall of the slot is fixedly connected to the surface of the connecting rod (14), and the upper end surface of the step platform (11) is in contact with the lower end surface of the second partition (12), the inclined surface of the step platform (11) is rollingly connected to a roller (17), the end surface of the roller (17) is rotatably connected to a sliding frame (18), the lower end surface of the sliding frame (18) is slidably connected to the upper end surface of the first partition (10), and the upper end surface of the first partition (10) is also fixedly connected to a second sliding frame (21), and the inner wall of the second sliding frame (21) is slidably connected to the surface of the sliding frame (18); A reminder rod (20), the air cooler (2) is provided with a reminder groove (7) penetrating into the interior on the lower end surface of the partition plate (12), the groove wall of the reminder groove (7) is slidably connected to the surface of the reminder rod (20), the end surface of the reminder rod (20) is fixedly connected to the surface of the sliding frame (18), the surface of the sliding frame (18) is also fixedly connected to a spring (19), and one end of the spring (19) away from the sliding frame (18) is fixedly connected to the inner wall of the air cooler (2); The adjustment component comprises: A threaded column (27), the upper end surface of the threaded column (27) being rotatably connected to the lower end surface of the sliding plate (25), the threaded surface of the threaded column (27) being threadedly connected to a nut (26), the upper end surface of the nut (26) being fixedly connected to the outer lower end surface of the refrigerant cylinder (1).

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