A device for controlling the liquid level of refrigerant

Abstract

The present invention discloses a device for controlling the liquid level of a refrigerant, and relates to the technical field of liquid level control of refrigeration equipment, comprising a main box, wherein a liquid outlet pipe 1, an observation window 1, and a liquid inlet pipe 1 are respectively arranged on the outside of the main box, and a liquid level regulating structure is arranged at one end of the liquid inlet pipe 1. The device for controlling the liquid level of a refrigerant described in the present invention can make the device change and adjust between a low liquid level and a high liquid level, or directly fill the inside of the main box with refrigerant, and automatically close the liquid inlet pipe 2 when the liquid level is adjusted to a suitable liquid level, and at the same time, the float push rod can close the opening and closing plate when the device is not working, so that the device can be used in a variety of usage situations, and its working adaptability can be improved, and the problem that the internal space of the device cannot be fully utilized after the buoyancy switch control mechanism is arranged inside the existing device can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level control of refrigeration equipment, and in particular to a device for controlling the liquid level of a refrigerant. Background Art

[0002] Refrigerant is an indispensable part of refrigeration equipment. Usually, the liquid level of the refrigerant needs to be adjusted and controlled when it is used. Generally, the liquid level is controlled by a float according to the change of the liquid level.

[0003] A Chinese patent with publication number "CN214846403U" discloses "a liquid level control device for EDI desalted water, involving the relevant field of EDI desalted water, to solve the problem that the current liquid level control device for EDI desalted water relies on a float to achieve the blocking of the liquid inlet pipe". Although it can achieve certain effects, the setting of the device itself has great limitations. The setting method of the device results in that the liquid level can only be controlled up and down within a very small range, and the controllable range of the liquid level is small. In addition, the way in which the buoyancy mechanism is set inside the box makes the box lose the ability to be fully loaded and loaded at a high liquid level, so that the space of the device itself is wasted and the use limitation is large. Therefore, the present invention proposes a device for controlling the refrigerant liquid level. Summary of the invention

[0004] The main purpose of the present invention is to provide a device for controlling the refrigerant liquid level, which can effectively solve the technical problems raised in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A device for controlling the refrigerant liquid level comprises a main box body, wherein a liquid outlet pipe, an observation window and a liquid inlet pipe are respectively arranged on the outside of the main box body, and a liquid level regulating structure is arranged at one end of the liquid inlet pipe.

[0007] As a preferred technical solution of the present invention, the liquid level regulating structure includes a cylinder, the outside of which is respectively provided with a liquid outlet pipe 2 and an observation window 2, and the liquid outlet pipe 2 is connected to a liquid inlet pipe 1 by a plurality of bolt fasteners 1, the inside of the cylinder is movably provided with a liquid inlet pipe 2, the outside of the liquid inlet pipe 2 is fixedly provided with a fixing ring, a block and a fixing plate 1, one end of the liquid inlet pipe 2 is slidably connected to an opening and closing plate through four guide rods, one side of the outside of the fixing ring is fixedly connected to a storage rack 1, and the inner side of the storage rack 1 is rotatably connected to There is a screw rod 1, one end of which passes through the inner top surface of the storage rack 1 and is fixedly connected to the output shaft of the motor 1, a slider 1 is slidably arranged on the outside of the screw rod 1, a fixing plate 2 is fixedly connected to the top of the slider 1, two threaded holes are arranged on the front of the fixing plate 2, and the fixing plate 2 is connected to the fixing plate 3 through a bolt fastener 2, a connecting rod 1 is fixedly connected to the bottom of the fixing plate 3, one end of the connecting rod 1 passes through the slider 1 and the storage rack 1 respectively and is connected to the slider 2, and a float push rod is slidably arranged on the inner side of the slider 2.

[0008] As a preferred technical solution of the present invention, the liquid level adjustment structure also includes a power component, which is arranged on the outside of the cylinder, and the power component includes a second rack, which is fixedly arranged on the outside of the cylinder, and a screw rod 2 is rotatably arranged on the inner side of the second rack, one end of the screw rod 2 passes through the inner top of the second rack and is fixedly connected to the output shaft of the second motor, and a slider 3 is slidably arranged on the outside of the second screw rod, and the slider 3 is fixedly connected to a connecting plate through two connecting rods 2, and the connecting plate is fixedly connected to the other side of the outside of the fixing ring.

[0009] As a preferred technical solution of the present invention, the block is penetrated by a second liquid inlet pipe, and the block is hollow, and the first fixing plate is penetrated by a first connecting rod.

[0010] As a preferred technical solution of the present invention, a telescopic structure is arranged on the outside of the slider three, and the telescopic structure includes two fixed plates, the fixed plates are fixedly connected to the slider three, one side of the fixed plates is fixedly connected to a bottom plate, the bottom plate is connected to a protrusion through a telescopic rod, and a telescopic tube is slidably arranged on the outside of the cylinder, and the protrusion is fixedly connected to the telescopic tube.

[0011] As a preferred technical solution of the present invention, one end of the telescopic tube is respectively penetrated by the second liquid inlet tube and the first connecting rod, and the bottom plate is in an "L" shape.

[0012] As a preferred technical solution of the present invention, a blocking structure is provided on the inner side of the block, and the blocking structure includes two blocking plates, which are slidably provided on the inner side of the block, one end of the blocking plate is fixedly connected with a triangular block, the top of the blocking plate is fixedly connected with a convex plate 1, the top of the block is fixedly connected with two convex plates 2, a spring is provided between the two convex plates 1 and 2 on the same side, a floating plate is slidably provided on the inner side of the telescopic tube, the top of the floating plate is fixedly connected with two push rods, and one end of the push rods passes through the inner top surface of the telescopic tube.

[0013] As a preferred technical solution of the present invention, the connecting plate is in a "T" shape, and a scale is provided on the outer surface of the second observation window.

[0014] As a preferred technical solution of the present invention, the float push rod is composed of a plurality of buoyancy balls and a thrust rod, and the float plate is penetrated by a second liquid inlet pipe and a first connecting rod.

[0015] As a preferred technical solution of the present invention, the bolt fastener 1 and the bolt fastener 2 are both composed of bolts and nuts, and the cylinder is higher than the main box by the height of a floating plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting the liquid level adjustment structure, it is beneficial to make the device reach the change adjustment between the low liquid level and the high liquid level or directly fill the main box with refrigerant, and automatically close the second liquid inlet pipe when the liquid level is adjusted to the appropriate liquid level. At the same time, the float push rod can close the opening and closing plate when the device is not working;

[0018] 2. By setting a power assembly in conjunction with a liquid level adjustment structure, it is beneficial to enable the second liquid inlet pipe to move up and down to control the height change of the liquid level;

[0019] 3. By setting the coordination of bolt fastener 2, fixing plate 2, fixing plate 3, connecting rod 1, slider 2 and float push rod, it is beneficial to limit the height position of the float push rod, so as to avoid the float push rod moving up to push the opening and closing plate to close it when the main box needs to be filled with refrigerant;

[0020] 4. By setting up a telescopic structure in conjunction with a liquid level adjustment structure, it is helpful to make up for the height defect caused by the float push rod itself, and avoid the situation where the main box cannot be filled with refrigerant or the refrigerant cannot reach a high liquid level;

[0021] 5. By setting up a sealing structure in conjunction with a liquid level adjustment structure, it is helpful to fill the main box with refrigerant and improve its working adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall three-dimensional structure of a device for controlling the refrigerant liquid level of the present invention in an initial state;

[0023] Figure 2 It is a schematic diagram of the split three-dimensional structure of a liquid inlet pipe 2 and a guide rod of a device for controlling the liquid level of a refrigerant according to the present invention;

[0024] Figure 3 It is a three-dimensional structural schematic diagram of a storage rack 2 of a device for controlling the liquid level of a refrigerant according to the present invention;

[0025] Figure 4 It is a partial three-dimensional structural schematic diagram of a device for controlling the refrigerant liquid level of the present invention;

[0026] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of a telescopic pipe of a device for controlling the liquid level of a refrigerant according to the present invention;

[0027] Figure 6 A demonstration diagram of a telescopic tube of a device for controlling a refrigerant liquid level of the present invention being fully extended;

[0028] Figure 7 It is a demonstration diagram of a fixing plate of a device for controlling the liquid level of a refrigerant according to the present invention after three downward adjustments;

[0029] Figure 8 A demonstration diagram of a slider of a device for controlling the liquid level of a refrigerant according to the present invention moving upward with a floating ball push rod to close the opening and closing plate;

[0030] Fig. 9 The present invention is a schematic side view of the overall structure of a device for controlling the refrigerant liquid level.

[0031] In the figure: 1, main box; 2, liquid outlet pipe 1; 3, observation window 1; 4, liquid inlet pipe 1; 5, liquid level adjustment structure; 6, telescopic structure; 7, blocking structure; 8, cylinder; 9, liquid outlet pipe 2; 10, bolt fastener 1; 11, observation window 2; 12, liquid inlet pipe 2; 13, fixing ring; 14, block; 15, fixing plate 1; 16, guide rod; 17, opening and closing plate; 18, storage rack 1; 19, screw rod 1; 20, motor 1; 21, slider 1; 22, fixing plate 2; 2 3. Bolt fastener 2; 24. Fixing plate 3; 25. Connecting rod 1; 26. Sliding block 2; 27. Floating ball push rod; 28. Storage rack 2; 29. ​​Screw rod 2; 30. Motor 2; 31. Sliding block 3; 32. Connecting rod 2; 33. Connecting plate; 34. Fixing plate; 35. Bottom plate; 36. Telescopic rod; 37. Bump; 38. Telescopic tube; 39. Sealing plate; 40. Triangular block; 41. Bump plate 1; 42. Bump plate 2; 43. Spring; 44. Floating plate; 45. Push rod. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0033] like Figure 1-Figure 9 As shown, a device for controlling the refrigerant liquid level includes a main box body 1, and the outside of the main box body 1 is respectively provided with a liquid outlet pipe 2, an observation window 3 and a liquid inlet pipe 4, and one end of the liquid inlet pipe 4 is provided with a liquid level regulating structure 5.

[0034] An opening and closing valve can be connected to the liquid outlet pipe 2 and then connected to the refrigeration equipment.

[0035] In this embodiment, the liquid level regulating structure 5 includes a cylinder 8, and the outside of the cylinder 8 is respectively provided with a liquid outlet pipe 29 and an observation window 21, and the liquid outlet pipe 29 is connected to the liquid inlet pipe 4 through a plurality of bolt fasteners 10, and a liquid inlet pipe 212 is movably provided inside the cylinder 8, and a fixing ring 13, a block 14 and a fixing plate 15 are fixedly provided outside the liquid inlet pipe 212, and one end of the liquid inlet pipe 212 is slidably connected to an opening and closing plate 17 through four guide rods 16, and a shelf 18 is fixedly connected to the outside of the fixing ring 13, and a screw rod 19 is rotatably connected to the inside of the shelf 18, and the screw rod 19 is rotatably connected to the inside of the shelf 18. One end of the rod 19 passes through the inner top surface of the storage rack 18 and is fixedly connected to the output shaft of the motor 20. A slider 21 is slidably provided on the outside of the screw rod 19. A fixing plate 22 is fixedly connected to the top of the slider 21. Two threaded holes are provided on the front of the fixing plate 22, and the fixing plate 22 is connected to a fixing plate 3 24 through a bolt fastener 23. The bottom of the fixing plate 3 24 is fixedly connected to a connecting rod 25. One end of the connecting rod 25 passes through the slider 21 and the storage rack 18 respectively and is connected to a slider 26. A float push rod 27 is slidably provided on the inner side of the slider 26.

[0036] The liquid level adjustment structure 5 can make the device reach a variable adjustment between a low liquid level and a high liquid level or directly fill the main box 1 with refrigerant and automatically close the liquid inlet pipe 2 12 when the liquid level is adjusted to a suitable liquid level.

[0037] In this embodiment, the liquid level adjustment structure 5 also includes a power component, which is arranged on the outside of the cylinder 8. The power component includes a rack 28, which is fixedly arranged on the outside of the cylinder 8. A screw rod 29 is rotatably arranged on the inner side of the rack 28. One end of the screw rod 29 passes through the inner top of the rack 28 and is fixedly connected to the output shaft of the motor 2 30. A slider 31 is slidably arranged on the outside of the screw rod 29. The slider 31 is fixedly connected to a connecting plate 33 through two connecting rods 232. The connecting plate 33 is fixedly connected to the other side of the outside of the fixing ring 13.

[0038] The power assembly enables the liquid inlet pipe 12 to move up and down to control the height change of the liquid level.

[0039] In this embodiment, the block 14 is penetrated by the second liquid inlet pipe 12 , and the block 14 is hollow, and the fixing plate 15 is penetrated by the connecting rod 1 25 .

[0040] The position range of the floating ball push rod 27 can be controlled by adjusting the height of the connecting rod 25.

[0041] In this embodiment, a telescopic structure 6 is provided on the outside of the slider three 31, and the telescopic structure 6 includes two fixed plates 34. The fixed plates 34 are fixedly connected to the slider three 31, and a bottom plate 35 is fixedly connected to one side of the fixed plate 34. The bottom plate 35 is connected to a protrusion 37 through a telescopic rod 36. A telescopic tube 38 is slidably provided on the outside of the cylinder 8, and the protrusion 37 is fixedly connected to the telescopic tube 38.

[0042] The telescopic structure 6 can make up for the height defect caused by the float push rod 27 itself, so as to prevent the main box 1 from being unable to be filled with refrigerant or the refrigerant from reaching a high liquid level.

[0043] In this embodiment, one end of the telescopic tube 38 is respectively penetrated by the second liquid inlet tube 12 and the first connecting rod 25, and the bottom plate 35 is in an "L" shape.

[0044] The telescopic tube 38 has a limiting effect on the liquid inlet tube 12 .

[0045] In this embodiment, a blocking structure 7 is provided on the inner side of the block 14, and the blocking structure 7 includes two blocking plates 39, which are slidably provided on the inner side of the block 14, one end of the blocking plate 39 is fixedly connected with a triangular block 40, the top of the blocking plate 39 is fixedly connected with a convex plate 1 41, the top of the block 14 is fixedly connected with two convex plates 2 42, a spring 43 is provided between the two convex plates 1 41 and convex plates 2 42 on the same side, a floating plate 44 is slidably provided on the inner side of the telescopic tube 38, the top of the floating plate 44 is fixedly connected with two push rods 45, and one end of the push rods 45 passes through the inner top surface of the telescopic tube 38.

[0046] The blocking structure 7 can isolate the inside of the liquid inlet pipe 2 12 when the main box 1 is filled with refrigerant.

[0047] In this embodiment, the connecting plate 33 is in a "T" shape, and a scale is provided on the outer surface of the second observation window 11.

[0048] Observe the height of the refrigerant liquid level through the scale on the observation window 11.

[0049] In this embodiment, the float push rod 27 is composed of a plurality of buoyancy balls and a thrust rod, and the float plate 44 is penetrated by the second liquid inlet pipe 12 and the first connecting rod 25.

[0050] The float push rod 27 moves under the action of the refrigerant to restrict the opening and closing plate 17.

[0051] In this embodiment, the bolt fastener 10 and the bolt fastener 23 are both composed of bolts and nuts, and the cylinder 8 is higher than the main box 1 by the height of a floating plate 44.

[0052] The fact that the floating plate 44 is in contact with the inner top surface of the telescopic tube 38 indicates that the main housing 1 is filled with the refrigerant.

[0053] It should be noted that the present invention is a device for controlling the refrigerant liquid level. Before use, the device is placed in a desired location, an on-off valve is externally connected to the liquid outlet pipe 2 and connected to an external device, the on-off valve is closed, the cylinder 8 is connected to the liquid inlet pipe 4 through a bolt fastener 10, and then the refrigerant is introduced from the liquid inlet port of the liquid inlet pipe 12 to achieve the working operating conditions. According to the different use requirements of the main work, the device can be used in three situations. In addition, the initial state of the device is Figure 1 As shown;

[0054] Situation 1: When the main box body 1 needs to be filled with refrigerant, in the initial state of the device, remove the bolt fastener 23, move the fixing plate 3 24 down to the predetermined position, and then install the bolt fastener 23. Next, introduce the refrigerant from the liquid inlet of the liquid inlet pipe 2 12. The opening and closing plate 17 is in the open state under the action of its own gravity. The refrigerant flows into the interior of the cylinder 8 from the liquid outlet of the liquid inlet pipe 2 12, and then flows into the interior of the main box body 1 through the liquid outlet pipe 2 9 and the liquid inlet pipe 1 4. The float push rod 27 gradually moves upward under the action of the refrigerant until it is blocked by the slider 2 26 and stops moving upward. Since the connecting rod 1 25 moves downward with the slider 2 26 as a whole, the range in which the float push rod 27 can move upward is reduced, so as to prevent it from floating up and opening the starter. The closing plate 17 is pushed up and then closed. When the liquid level of the refrigerant contacts the floating plate 44, the refrigerant acts on the floating plate 44 to move upward. The upward movement of the floating plate 44 acts on the push rod 45 to move upward synchronously. The push rod 45 acts on the triangular block 40, so that the triangular block 40 moves toward the inner middle of the block 14 with the blocking plate 39. When the refrigerant acts on the top of the floating plate 44 and fits the inner top surface of the telescopic tube 38, the blocking plate 39 cuts off the liquid inlet pipe 12, so that the introduction of the refrigerant stops. Since the main box body 1 is one less height of the floating plate 44 than the cylinder body 8, the refrigerant liquid level inside the cylinder body 8 is at the bottom of the floating plate 44 at this time, so the liquid level inside the main box body 1 reaches the inner top surface of the main box body 1, which means that the refrigerant inside the main box body 1 is filled at this time.

[0055] Case 2: When the main box 1 is not filled with refrigerant for liquid level control, in the initial state, according to the need of liquid level height, the motor 2 30 is started, so that the slider 31 moves toward the direction of the motor 2 30 outside the screw rod 29, and the slider 31 acts on the liquid inlet pipe 2 12 to move upward synchronously through the connecting rod 2 32 and the connecting plate 33. Since the rack 18 and the fixing ring 13 are fixedly connected, the liquid inlet pipe 2 12 will move with the rack 18 synchronously when it moves, so that the connecting rod 2 5 The slider 26 moves upward, and when the slider 26 moves to a certain height, it is limited by the top of the float push rod 27, and the float push rod 27 moves upward synchronously. When the liquid outlet of the liquid inlet pipe 22 reaches the height of the predetermined scale on the scale gauge on the observation window 211, the motor 230 is turned off, and then the refrigerant is introduced as in the case 1. Under the action of the refrigerant, the float push rod 27 gradually moves upward until the float push rod 27 moves upward to push the opening and closing plate 17 to reach the closed state. At this time, the liquid outlet of the liquid inlet pipe 22 is opened and closed. The plate 17 is blocked, and the refrigerant in the main box 1 reaches a predetermined liquid level. In addition, when the refrigerant in the main box 1 needs a high liquid level, the motor 2 30 acts on the slider 3 31 to move up until the top of the slider 3 31 is completely in contact with the inner top surface of the rack 2 28 and then stops. The slider 31 moves up and moves the bottom plate 35 synchronously. The bottom plate 35 moves up and acts on the telescopic rod 36 to shrink. When the telescopic rod 36 is completely shrunk, the slider 3 31 continues to move up, and the telescopic rod 36 acts The protrusion 37 causes the telescopic tube 38 to move upward. When the top of the slider 31 and the inner top surface of the rack 28 are completely in contact, the telescopic tube 38 is extended to the maximum value. The telescopic tube 38 is not only used when it is extended to the maximum value. The telescopic tube 38 is only used to make up for the defect caused by the height of the float push rod 27 itself, so as to avoid the main box 1 not being filled with refrigerant or the refrigerant not reaching a high liquid level state, so that the liquid level inside the main box 1 can be adjusted and controlled from a low liquid level to a high liquid level range.

[0056] Case three: when the device is not in use and the liquid inlet pipe 12 needs to be closed, the starting motor 20 acts on the screw 19 to rotate, so that the slider 21 moves up through the fixed plate 22. Since the fixed plate 3 24 is connected to the fixed plate 22 by the bolt fastener 23, the connecting rod 1 25 simultaneously moves the slider 2 26 up. When the slider 21 moves to the predetermined position, the slider 2 26 brings the float push rod 27 to push the opening and closing plate 17 up to a closed state, thereby completing the closing work of the liquid inlet pipe 12.

Claims

1. A device for controlling a refrigerant liquid level, comprising a main housing (1), wherein the exterior of the main housing (1) is provided with a liquid outlet pipe (2), an observation window (3) and a liquid inlet pipe (4), characterized in that: A liquid level regulating structure (5) is provided at one end of the liquid inlet pipe (4); The liquid level regulating structure (5) comprises a cylinder (8), the outside of which is respectively provided with a second liquid outlet pipe (9) and a second observation window (11), and the second liquid outlet pipe (9) is connected to a first liquid inlet pipe (4) via a plurality of first bolt fasteners (10), a second liquid inlet pipe (12) is movably provided inside the cylinder (8), a fixing ring (13), a block (14) and a first fixing plate (15) are fixedly provided outside the second liquid inlet pipe (12), one end of the second liquid inlet pipe (12) is slidably connected to an opening and closing plate (17) via four guide rods (16), a storage rack (18) is fixedly connected to one side of the outside of the fixing ring (13), a screw rod (19) is rotatably connected to the inside of the storage rack (18), and the second liquid inlet pipe (12) is rotatably connected to the inner side of the second liquid inlet pipe (12). One end of the screw rod 1 (19) passes through the inner top surface of the storage rack 1 (18) and is fixedly connected to the output shaft of the motor 1 (20); a slider 1 (21) is slidably arranged outside the screw rod 1 (19); a fixing plate 2 (22) is fixedly connected to the top of the slider 1 (21); two threaded holes are arranged at the front of the fixing plate 2 (22); the fixing plate 2 (22) is connected to the fixing plate 3 (24) via a bolt fastener 2 (23); a connecting rod 1 (25) is fixedly connected to the bottom of the fixing plate 3 (24); one end of the connecting rod 1 (25) passes through the slider 1 (21) and the storage rack 1 (18) respectively and is connected to the slider 2 (26); a floating ball push rod (27) is slidably arranged inside the slider 2 (26); A telescopic tube (38) is slidably provided on the outside of the cylinder (8); A blocking structure (7) is provided on the inner side of the block (14), the blocking structure (7) comprising two blocking plates (39), the blocking plates (39) being slidably provided on the inner side of the block (14), one end of the blocking plate (39) being fixedly connected to a triangular block (40), the top of the blocking plate (39) being fixedly connected to a convex plate 1 (41), the top of the block (14) being fixedly connected to two convex plates 2 (42), a spring (43) being provided between the two convex plates 1 (41) and convex plates 2 (42) on the same side, a floating plate (44) being slidably provided on the inner side of the telescopic tube (38), the top of the floating plate (44) being fixedly connected to two push rods (45), and one end of the push rods (45) passing through the inner top surface of the telescopic tube (38).

2. A device for controlling refrigerant liquid level according to claim 1, characterized in that: The liquid level regulating structure (5) further comprises a power assembly, the power assembly being arranged outside the cylinder (8), the power assembly comprising a second rack (28), the second rack (28) being fixedly arranged outside the cylinder (8), a second screw rod (29) being rotatably arranged inside the second rack (28), one end of the second screw rod (29) passing through the top of the inner side of the second rack (28) and being fixedly connected to the output shaft of the second motor (30), a third slider (31) being slidably arranged outside the second screw rod (29), the third slider (31) being fixedly connected to a connecting plate (33) via two second connecting rods (32), and the connecting plate (33) being fixedly connected to the other side of the outer side of the fixing ring (13).

3. A device for controlling refrigerant liquid level according to claim 1, characterized in that: The block (14) is penetrated by the second liquid inlet pipe (12), and the block (14) is hollow, and the first fixing plate (15) is penetrated by the first connecting rod (25).

4. A device for controlling refrigerant liquid level according to claim 2, characterized in that: A telescopic structure (6) is provided on the outside of the slider three (31), and the telescopic structure (6) comprises two fixed plates (34), the fixed plates (34) are fixedly connected to the slider three (31), a bottom plate (35) is fixedly connected to one side of the fixed plates (34), the bottom plate (35) is connected to a protrusion (37) via a telescopic rod (36), and the protrusion (37) is fixedly connected to a telescopic tube (38).

5. A device for controlling refrigerant liquid level according to claim 4, characterized in that: One end of the telescopic tube (38) is penetrated by the second liquid inlet tube (12) and the first connecting rod (25), respectively, and the bottom plate (35) is in an "L" shape.

6. The device for controlling the refrigerant liquid level according to claim 2, characterized in that: The connecting plate (33) is in a "T" shape, and a scale is provided on the outer surface of the second observation window (11).

7. The device for controlling the refrigerant liquid level according to claim 1, characterized in that: The float push rod (27) is composed of a plurality of buoyancy balls and a push rod, and the float plate (44) is penetrated by the second liquid inlet pipe (12) and the first connecting rod (25).

8. The device for controlling the refrigerant liquid level according to claim 1, characterized in that: The bolt fastener 1 (10) and the bolt fastener 2 (23) are both composed of bolts and nuts. The cylinder (8) is higher than the main box (1) by the height of a floating plate (44).

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