A timed liquid supply device for a low-pressure refrigeration tank

Abstract

This utility model provides a timed liquid supply device for a low-pressure refrigeration tank, relating to the technical field of liquid supply devices for low-pressure refrigeration tanks. It includes a liquid supply mechanism comprising a liquid supply pipe with a control chamber connected in the middle. A stop plate, elastically extendable within the control chamber, controls the opening and closing of the liquid supply pipe. A connecting rod is fixedly mounted on one side of the stop plate, and the other side of the stop plate always elastically abuts against the inner wall of one side of the control chamber, keeping the liquid supply pipe closed. It also includes a timing mechanism comprising a cam rotatably mounted outside the control chamber and a drive source. The drive source is connected to the cam via a reduction gear set. When the rising arc segment of the cam rotates to abut against the connecting rod, it drives the stop plate to slide until the liquid supply pipe opens. This invention solves the problems of existing technologies where manual adjustment is highly arbitrary, detrimental to stable system operation, and where automated liquid supply devices are complex, costly, and difficult to maintain.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid supply devices for low-pressure refrigeration tanks, and in particular to a timed liquid supply device for low-pressure refrigeration tanks. Background Technology

[0002] In a refrigeration system, the low-pressure circulation tank is a key component. Its core function is to receive the refrigerant gas-liquid mixture returning from the evaporator and separate it. The separated liquid refrigerant accumulates at the bottom of the tank and is continuously delivered to the evaporator by the liquid supply pump to meet the refrigeration demand, while the separated gas is drawn back by the compressor, thereby maintaining the continuous and stable operation of the system.

[0003] Currently, there are significant problems with the liquid supply control of low-pressure tanks: On the one hand, many production lines rely on operators to manually adjust the liquid supply valves based on the liquid level. This method is highly subjective and lacks standardization, and is prone to over- or under-supply due to improper operation, which can lead to system liquid level fluctuations or even the risk of liquid slugging in the compressor, seriously affecting equipment safety and product quality stability. On the other hand, although some automated liquid supply devices can achieve timed control, they are usually based on electronic sensors and programmable controllers, which are complex in structure, expensive, and difficult to maintain, making them difficult to widely apply in small and medium-sized refrigeration equipment. Therefore, the market urgently needs a liquid supply control solution that is simple in structure, low in cost, and highly reliable. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a timed liquid supply device for a low-pressure refrigeration tank, which solves the problems of manual adjustment being highly arbitrary and not conducive to stable system operation, and the complex structure, high cost, and difficult maintenance of automated liquid supply devices.

[0005] According to an embodiment of the present invention, a timed liquid supply device for a low-pressure refrigeration tank includes:

[0006] A liquid supply mechanism includes a liquid supply pipe, a liquid control chamber is connected in the middle of the liquid supply pipe, a stop plate that can control the opening and closing of the liquid supply pipe is elastically telescopically installed in the liquid control chamber, a connecting rod is fixedly installed on one side of the stop plate, and the other side of the stop plate is always elastically abutting against the inner wall of one side of the liquid control chamber to keep the liquid supply pipe closed.

[0007] The timing mechanism includes a cam rotatably disposed outside the liquid control chamber and a drive source. The drive source is connected to the cam via a reduction gear set. When the rising arc segment of the cam rotates to abut against the connecting rod, it can drive the stop plate to slide until the liquid supply pipe is opened.

[0008] The technical principle of this utility model is as follows: the cam rotates slowly under the drive of the drive source and the deceleration of the reduction gear set. When the rising arc segment of the cam rotates to contact the connecting rod, it pushes the connecting rod and the stop plate to slide against the elastic force, so that the liquid supply pipe is opened to supply liquid. When the cam continues to rotate to the base arc segment, the stop plate slides back to its original position under the action of elastic restoring force, and automatically closes the liquid supply pipe, thereby realizing the periodic and intermittent timed liquid supply function.

[0009] Furthermore, a mounting base is fixedly provided on one side of the liquid control cavity, and a sliding cavity is provided inside the mounting base that communicates with the liquid control cavity and allows the connecting rod to slide. A sealing ring is fixedly provided at the connection between the liquid control cavity and the sliding cavity.

[0010] Furthermore, a limiting ring is fixedly provided on the connecting rod, and a spring is fixedly connected to the bottom of the limiting ring. The other end of the spring is fixedly connected to the sliding cavity, and the spring drives the liquid stop plate to elastically abut against the inner wall of the liquid control cavity.

[0011] Furthermore, an abutment frame is fixedly connected to the end of the connecting rod, and the cam is rotatably disposed within the abutment frame, with its rotation axis located at the end away from the connecting rod.

[0012] Furthermore, the end of the abutment frame away from the connecting rod is configured as an arc surface, and the base arc segment of the cam is separate from the arc surface.

[0013] Furthermore, the mounting base is also provided with a meshing cavity coaxially connected to the sliding cavity. The meshing cavity is provided with an internal thread, and a hollow sleeve is meshed in the meshing cavity through the internal thread. The bottom of the hollow sleeve is provided with a limiting hole for the connecting rod to pass through, and the connecting rod is provided with a limiting part that is separated from the inner wall of the hollow sleeve.

[0014] Furthermore, a handle is fixedly connected to the outside of the hollow sleeve for controlling the hollow sleeve to be screwed in or out.

[0015] Furthermore, the drive source includes a micro motor, the output end of which is coaxially and fixedly connected to the input end of the reduction gear set, and the output end of the reduction gear set is coaxially and fixedly connected to the cam.

[0016] Furthermore, the reduction gear set includes a drive gear and a driven gear that mesh with each other. The driven gear has a larger diameter than the drive gear. The output end of the micro motor is fixedly connected to the drive gear, and the driven gear is fixedly connected to the cam coaxially.

[0017] Furthermore, the reduction gear set also includes an intermediate gear and an incomplete gear that are coaxially fixedly connected. The diameter of the intermediate gear is larger than that of the drive gear and the incomplete gear. The intermediate gear meshes with the drive gear, and the incomplete gear meshes with the driven gear.

[0018] Compared with existing technologies, this utility model has the following advantages: By adopting a purely mechanical timing drive structure consisting of a drive source, a reduction gear set, and a cam, combined with the elastic reset design of the stop plate, periodic liquid supply control without manual intervention is achieved. Its mechanical transmission method fundamentally overcomes the arbitrariness of manual operation and ensures the stability and consistency of the liquid supply process. At the same time, this structure eliminates expensive electronic sensors and controllers, which not only significantly reduces manufacturing costs but also improves the system's anti-interference ability and maintenance convenience, making it particularly suitable for long-term stable operation in complex refrigeration industrial environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the reduction gear set structure according to an embodiment of the present utility model.

[0021] Figure 3 This is a cross-sectional assembly diagram of the non-liquid supply state according to an embodiment of the present invention.

[0022] Figure 4 This is a cross-sectional assembly diagram of the liquid supply state according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the manual adjustment liquid supply cross-section assembly according to an embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the liquid-stopping plate and connecting rod structure according to an embodiment of the present utility model.

[0025] Figure 7 This is a schematic diagram of the hollow sleeve structure according to an embodiment of the present utility model.

[0026] In the above figures: 1. Liquid supply pipe; 11. Flange; 2. Liquid control chamber; 3. Mounting base; 31. Sliding chamber; 311. Sealing ring; 32. Engaging chamber; 321. Internal thread; 33. First mounting plate; 34. Second mounting plate; 4. Liquid stop plate; 41. Connecting rod; 411. Limiting ring; 42. Spring; 43. Abutting frame; 431. Arc surface; 44. Limiting part; 5. Cam; 51. Cam shaft; 6. Reduction gear set; 61. Micro motor; 611. Motor frame; 62. Drive gear; 63. Driven gear; 64. Intermediate gear; 65. Incomplete gear; 7. Hollow sleeve; 71. Handle; 72. External thread; 73. Limiting hole. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1-3 As shown in the figure, this utility model embodiment proposes a timed liquid supply device for a low-pressure refrigeration tank, which includes a liquid supply mechanism. The liquid supply mechanism includes a liquid supply pipe 1, with flanges 11 fixedly connected to both ends of the liquid supply pipe 1 for connection with other liquid delivery pipelines. A liquid control chamber 2 is connected in the middle of the liquid supply pipe 1. A stop plate 4 that can control the opening and closing of the liquid supply pipe 1 is elastically and telescopically installed in the liquid control chamber 2. A connecting rod 41 is fixedly installed on one side of the stop plate 4, and the other side of the stop plate 4 is always elastically abutting against the inner wall of one side of the liquid control chamber 2 to keep the liquid supply pipe 1 closed. It also includes a timing mechanism, which includes a cam 5 rotatably installed on the outside of the liquid control chamber 2 and a drive source. The drive source is driven and connected to the cam 5 through a reduction gear set 6. When the rising arc segment of the cam 5 rotates to abut against the connecting rod 41, it can drive the stop plate 4 to slide until the liquid supply pipe 1 is opened.

[0029] In this exemplary embodiment, the liquid control chamber 2 is arranged to enclose and surround the liquid supply pipe 1, and a break is made in the section of the liquid supply pipe 1 located in the chamber, so that the liquid stop plate 4 can be precisely slidably embedded in the break, realizing the cut-off or connection of the flow channel. Preferably, the diameter of the liquid stop plate 4 is larger than that of the liquid supply pipe 1, and flexible sealing materials (such as rubber or polytetrafluoroethylene) are provided at both ends of its plate surface, so that it can be stably embedded and tightly sealed in the break of the liquid supply pipe 1 under the action of elasticity, realizing the control of the opening and closing of the liquid supply pipe 1, effectively avoiding refrigerant leakage, and ensuring the reliability of the closed state; the reduction gear set 6 includes several meshing gears, which convert the high speed input by the drive source into a significantly reduced output speed, thereby driving the cam 5 to rotate slowly and periodically. The intermittent push of the connecting rod 41 by the rising arc segment of the cam 5 drives the liquid stop plate 4 to open, realizing a stable timed liquid supply function.

[0030] The technical principle of this utility model is as follows: the cam 5 rotates slowly under the drive of the drive source and the deceleration of the reduction gear set 6. When the rising arc segment of the cam 5 rotates to contact the connecting rod 41, it pushes the connecting rod 41 and the liquid stop plate 4 to slide against the elastic force, so that the liquid supply pipe 1 is opened to supply liquid. When the cam 5 continues to rotate to the base arc segment, the liquid stop plate 4 slides back to its original position under the action of elastic restoring force, and automatically closes the liquid supply pipe, thereby realizing the periodic and intermittent timed liquid supply function.

[0031] This invention employs a purely mechanical timing drive structure consisting of a drive source, a reduction gear set 6, and a cam 5, combined with the elastic reset design of the stop plate 4, to achieve periodic liquid supply control without manual intervention. Its mechanical transmission method fundamentally overcomes the arbitrariness of manual operation, ensuring the stability and consistency of the liquid supply process. At the same time, this structure eliminates the need for expensive electronic sensors and controllers, which not only significantly reduces manufacturing costs but also improves the system's anti-interference ability and maintenance convenience, making it particularly suitable for long-term stable operation in complex refrigeration industrial environments.

[0032] like Figure 1-3 As shown, in another embodiment, a mounting base 3 is fixedly provided on one side of the liquid control chamber 2. The mounting base 3 is provided with a sliding cavity 31 that communicates with the liquid control chamber 2 and allows the connecting rod 41 to slide. A sealing ring 311 is fixedly provided at the connection between the liquid control chamber 2 and the sliding cavity 31. Based on the above configuration, the mounting base 3 and the sliding cavity 31 provide stable axial guidance and support for the connecting rod 41. An appropriate gap is maintained between the sliding cavity 31 and the connecting rod 41 to ensure smooth movement. The sealing ring 311 is made of materials such as nitrile rubber or fluororubber. The sealing ring 311 prevents refrigerant from entering the sliding cavity 31 from the liquid control chamber 2, ensuring the overall sealing reliability of the system.

[0033] like Figure 3-5 As shown, in another embodiment, a limiting ring 411 is further fixedly provided on the connecting rod 41. A spring 42 is fixedly connected to the bottom of the limiting ring 411. The other end of the spring 42 is fixedly connected to the sliding cavity 31. The spring 42 drives the stop plate 4 to elastically abut against the inner wall of the liquid control cavity 2. Based on the above configuration, the spring 42 continuously provides an upward elastic force, so that the connecting rod 41 drives the stop plate 4 to always press against the inner wall of the liquid control cavity 2, ensuring that the liquid supply pipe 1 is normally closed and sealed. At the same time, after the cam 5 rotates through the rising arc segment, it can automatically pull the stop plate 4 to reset, realizing stable and reliable periodic opening and closing control.

[0034] like Figure 3-5As shown, in another embodiment, the connecting rod 41 is further fixedly connected to an abutment frame 43 at its end, and the cam 5 is rotatably disposed within the abutment frame 43, with its rotation axis located at the end away from the connecting rod 41. Based on the above configuration, when the cam 5 rotates at low speed, its rising arc segment will idle within the abutment frame 43 without contacting the frame wall in most of the rotation angle range. At this time, the liquid supply pipe 1 remains closed. Only when the rising arc segment rotates to abut against the inner wall of the frame at the end away from the connecting rod 41 will the entire abutment frame 43 and the connecting rod 41 be pushed to slide together against the elastic force, thereby opening the liquid supply pipe 1. In this embodiment, by reasonably designing the size, shape, and relative position relationship between the cam 5 and the abutment frame 43, the effective abutment time between the cam 5 and the frame wall can be precisely controlled, thereby achieving a timed liquid supply effect of the liquid supply pipe 1 being briefly opened after a long period of closure, significantly improving the accuracy and reliability of the control.

[0035] like Figure 6 As shown, in another embodiment, the end of the abutment frame 43 away from the connecting rod 41 is further configured as an arc surface 431, and the base arc segment of the cam 5 is separated from the arc surface 431. Preferably, the edge position where the abutment frame 43 contacts the cam 5 is chamfered. Based on the above configuration, the base arc segment of the cam 5 always remains in a non-contact state with the arc surface 431. The presence of the arc surface 431 and the chamfer allows the rising arc segment of the cam 5 to contact and separate from the arc inner wall of the abutment frame 43 more smoothly, reducing frictional resistance and impact vibration during movement. This effectively avoids the problem of mechanism jamming and wear, and ensures the smoothness of the timed liquid supply action and the long-term working reliability.

[0036] like Figure 3-5 and Figure 7As shown, in another embodiment, the mounting base 3 is further provided with a meshing cavity 32 coaxially connected to the sliding cavity 31. A hollow sleeve 7 meshes within the meshing cavity 32. Specifically, the meshing cavity 32 is provided with an internal thread 321, and the hollow sleeve 7 is provided with an external thread 72 that can mesh with the internal thread 321. A limiting hole 73 is provided at the bottom of the hollow sleeve 7 for the connecting rod 41 to pass through. A limiting part 44 is provided on the connecting rod 41 that is separated from the inner wall of the hollow sleeve 7. The diameter of the limiting part 44 is larger than that of the limiting hole 73. Furthermore, a handle 71 is fixedly connected to the outside of the hollow sleeve 7 for... The hollow sleeve 7 is controlled to rotate in or out. Based on the above settings, when the hollow sleeve 7 rotates, it can precisely adjust its relative distance within the mounting base 3 by means of thread engagement. A limiting hole 73 is opened at the bottom of the sleeve for the connecting rod 41 to pass through, and the limiting part 44 on the connecting rod 41, which has a diameter larger than the limiting hole 73, is wrapped inside the sleeve. By screwing the hollow sleeve 7 upward, the inner wall at the bottom of the sleeve will push the limiting part 44 to lift the connecting rod 41 synchronously. Thus, the liquid supply pipe 1 can be manually and forcibly opened without relying on the cam 5 for driving. This realizes the combination of emergency manual control and conventional automatic timed control, which greatly facilitates system debugging and maintenance operations.

[0037] like Figure 1-2 As shown, in another embodiment, the drive source includes a micro motor 61, which is fixedly mounted on the mounting base via a motor frame 611. The output end of the micro motor 61 is coaxially and fixedly connected to the input end of the reduction gear set 6, and the output end of the reduction gear set 6 is coaxially and fixedly connected to the cam 5. Based on the above configuration, the micro motor 61 provides stable rotational power, which is then reduced in speed by the reduction gear set 6 and transmitted to the cam 5, ensuring the accuracy and reliability of timing control.

[0038] like Figure 1-2As shown, in another embodiment, the reduction gear set 6 further includes a driving gear 62 and a driven gear 63 meshing with each other. The diameter of the driven gear 63 is larger than that of the driving gear 62. The ratio of their diameters determines the speed ratio, which needs to be set according to the actual situation and is not limited here. The output end of the micro motor 61 is fixedly connected to the driving gear 62, and the driven gear 63 is coaxially fixedly connected to the cam 5. Specifically, a first mounting plate 33 and a second mounting plate 34 are fixedly mounted on both sides of the mounting base 3, and the cam 5 is rotatably connected to the first mounting plate 34 via a cam shaft 51. Between mounting plate 33 and second mounting plate 34, the driven gear 63 is rotatably and fixedly connected to the cam 5. Based on the above configuration, the diameter difference between the driven gear 63 and the drive gear 62 forms a specific reduction ratio. The output shaft of the micro motor 61 is directly and fixedly connected to the smaller drive gear 62 to input high-speed rotation, while the larger driven gear 63 is coaxially and fixedly connected to the cam shaft 51. Through the speed conversion effect generated by the meshing of gears with different diameters, the high-speed output of the motor is effectively reduced to the low-speed and smooth rotation required by the cam 5, thereby providing a reliable and accurate power basis for periodic timed liquid supply.

[0039] like Figure 1-2 As shown, in another embodiment, the reduction gear set 6 further includes an intermediate gear 64 and an incomplete gear 65 coaxially fixedly connected. The diameter of the intermediate gear 64 is larger than that of the driving gear 62 and the incomplete gear 65. The ratio of their diameters and the number of teeth of the incomplete gear 65 can determine the speed ratio, which needs to be set according to the actual situation and is not limited here. The intermediate gear 64 meshes with the driving gear 62, and the incomplete gear 65 meshes with the driven gear 63. Based on the above settings, the transmission system is further optimized by introducing a multi-stage reduction structure. Specifically, regarding timing accuracy, the micro motor 61 drives the small-sized drive gear 62 to rotate, which in turn drives the large-diameter intermediate gear 64 to achieve the first stage of deceleration. The incomplete gear 65, which is coaxial with the intermediate gear 64, rotates accordingly. Through its special tooth structure, it forms an intermittent meshing transmission with the driven gear 63. By utilizing the characteristic that the incomplete gear 65 only pushes the driven gear 63 through a specific angle with each rotation, the final output speed is significantly reduced on the basis of the primary deceleration. This allows the cam 5 to obtain a lower speed periodic rotation, thereby achieving precise control over the liquid supply start-up time and interval.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A refrigeration low-pressure barrel timing liquid supply device, characterized by, include: The liquid supply mechanism includes a liquid supply pipe (1), a liquid control chamber (2) is connected in the middle of the liquid supply pipe (1), a stop plate (4) that can control the opening and closing of the liquid supply pipe (1) is elastically telescopically arranged in the liquid control chamber (2), a connecting rod (41) is fixedly arranged on one side of the stop plate (4), and the other side of the stop plate (4) is always elastically abutting against the inner wall of one side of the liquid control chamber (2) to keep the liquid supply pipe (1) closed; The timing mechanism includes a cam (5) rotatably disposed outside the liquid control chamber (2) and a drive source. The drive source is connected to the cam (5) via a reduction gear set (6). When the rising arc segment of the cam (5) rotates to abut against the connecting rod (41), it can drive the stop plate (4) to slide to the opening of the liquid supply pipe (1).

2. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 1, characterized in that: A mounting base (3) is fixedly provided on one side of the liquid control chamber (2). A sliding cavity (31) is provided inside the mounting base (3) that communicates with the liquid control chamber (2) and allows the connecting rod (41) to slide. A sealing ring (311) is fixedly provided at the connection between the liquid control chamber (2) and the sliding cavity (31).

3. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 2, characterized in that: A limiting ring (411) is fixedly provided on the connecting rod (41). A spring (42) is fixedly connected to the bottom of the limiting ring (411). The other end of the spring (42) is fixedly connected to the sliding cavity (31). The spring (42) drives the stop plate (4) to elastically abut against the inner wall of the liquid control cavity (2).

4. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 2, characterized in that: The end of the connecting rod (41) is fixedly connected to the abutment frame (43), and the cam (5) is rotatably disposed in the abutment frame (43), with its rotation axis disposed at one end away from the connecting rod (41).

5. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 4, characterized in that: The end of the abutting frame (43) away from the connecting rod (41) is set as an arc surface (431), and the base arc segment of the cam (5) is separate from the arc surface (431).

6. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 2, characterized in that: The mounting base (3) is also provided with a meshing cavity (32) coaxially connected to the sliding cavity (31). The meshing cavity (32) is provided with an internal thread (321). A hollow sleeve (7) is meshed in the meshing cavity (32) through the internal thread (321). A limiting hole (73) is provided at the bottom of the hollow sleeve (7) for the connecting rod (41) to pass through. A limiting part (44) is provided on the connecting rod (41) that is separated from the inner wall of the hollow sleeve (7).

7. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 6, characterized in that: A handle (71) is fixedly connected to the outside of the hollow sleeve (7) for controlling the hollow sleeve (7) to be screwed in or out.

8. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 1, characterized in that: The driving source includes a micro motor (61), the output end of which is coaxially and fixedly connected to the input end of the reduction gear set (6), and the output end of the reduction gear set (6) is coaxially and fixedly connected to the cam (5).

9. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 8, characterized in that: The reduction gear set (6) includes a drive gear (62) and a driven gear (63) that mesh with each other. The diameter of the driven gear (63) is larger than that of the drive gear (62). The output end of the micro motor (61) is fixedly connected to the drive gear (62), and the driven gear (63) is fixedly connected to the cam (5) on the same axis.

10. A refrigeration low pressure barrel timer liquid supply device as claimed in claim 9, characterized in that: The reduction gear set (6) further includes an intermediate gear (64) and an incomplete gear (65) that are coaxially fixedly connected. The diameter of the intermediate gear (64) is larger than that of the drive gear (62) and the incomplete gear (65). The intermediate gear (64) meshes with the drive gear (62), and the incomplete gear (65) meshes with the driven gear (63).

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