A refrigerant one-way valve reversing pipeline for a heat pump air conditioning system

Abstract

This invention relates to the field of one-way valve technology, specifically to a refrigerant one-way valve reversing pipeline for a heat pump air conditioning system, comprising: a delivery pipe and a negative pressure telescopic mechanism. One end of the delivery pipe is connected to a negative pressure pipe. The negative pressure telescopic mechanism is disposed on the inner wall of the negative pressure pipe. An annular air bladder is provided on the inner wall of the delivery pipe, and a vent pipe is connected to the outer wall of the annular air bladder. The outer wall of the vent pipe penetrates and is fixedly installed on the outer wall of the delivery pipe. This invention utilizes the cooperation between the annular contraction element, the piston, the inclined surface, the vent pipe, and the limiting ring. The piston automatically extends its length under liquid drive through the annular contraction element, making the piston unaffected by air pressure and liquid drive in the opening direction. When air pressure and liquid push occur in the opening direction, the piston is limited by the annular contraction element and cannot open the inner wall of the rectangular shell, avoiding backflow and thus improving the functionality of the device.

Description

Technical Field

[0001] This invention relates to the field of one-way valve technology, and more specifically to a refrigerant one-way valve reversing pipeline for a heat pump air conditioning system. Background Technology

[0002] Heat pump air conditioners have both cooling and heating functions. They require a four-way reversing valve to switch between cooling and heating modes, allowing the evaporator (used in cooling mode) to function as the condenser in heating mode, and vice versa. Since most electronic expansion valves only allow unidirectional refrigerant flow, heat pump systems currently employ pipeline solenoid valves for refrigerant reversal, along with an electronic control system to control the on / off states of these solenoid valves, thus enabling the switching between cooling and heating modes.

[0003] Currently, solenoid valves are used, requiring an electronic control system to operate. To reduce costs, check valves are sometimes used to replace the solenoid valve's function. While check valves ensure unidirectional liquid movement, the liquid flow may increase the pressure within the pipe, potentially opening other check valves and causing backflow. (See the instruction manual for details.) Figure 2 As shown, when liquid flows from zone C to zone E, it will push the air pressure to open the one-way valves in zones B and E. If liquid enters zone B, backflow will occur. However, the solenoid valve is controlled by an electronic system and is not affected by the liquid-driven air pressure. Therefore, the one-way valve has low functionality. To address this, the present invention provides a refrigerant one-way valve reversing pipeline for a heat pump air conditioning system. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of backflow caused by one-way valves driven by air pressure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a refrigerant one-way valve reversing pipeline for a heat pump air conditioning system, comprising: a delivery pipe and a negative pressure telescopic mechanism, one end of the delivery pipe being connected to a negative pressure pipe, the negative pressure telescopic mechanism being disposed on the inner wall of the negative pressure pipe, the inner wall of the delivery pipe being provided with an annular air bladder, the outer wall of the annular air bladder being connected to a vent pipe, the outer wall of the vent pipe penetrating and being fixedly installed on the outer wall of the delivery pipe, and the other end of the vent pipe being connected to a circular retractable element;

[0006] The circular retractable member can extend and retract to contact one end of the piston in the negative pressure telescopic mechanism. The piston is restricted between the limiting ring and the circular retractable member in the negative pressure telescopic mechanism. The piston is located inside the rectangular shell in the negative pressure telescopic mechanism, so that the negative pressure tube is in a connected state.

[0007] In a preferred embodiment, the outer wall of the negative pressure pipe one is connected to a one-way valve one, the negative pressure pipe one is n-shaped, the two ends of the negative pressure pipe one are connected to negative pressure pipe two and negative pressure pipe three, and the center line of the negative pressure pipe two is connected to an electronic expansion valve.

[0008] The negative pressure pipe three is U-shaped, and the outer wall of the negative pressure pipe three is connected to the delivery pipe two and the one-way valve two. A rectangular shell two is fixedly installed on the outer wall of the negative pressure pipe three.

[0009] The inner walls at both ends of the negative pressure tube one and negative pressure tube three have low air pressure and high air pressure, respectively.

[0010] In a preferred embodiment, the negative pressure telescopic mechanism includes a rectangular shell connected to the outer wall of a negative pressure pipe. A connecting rod is fixedly installed on the inner wall of the rectangular shell. A cylindrical component is fixedly installed on one side of the connecting rod. The cylindrical component and the rectangular shell are connected to the negative pressure pipe. A fixing ring is fixedly installed at one end of the cylindrical component near the conveying pipe. One side of the fixing ring is fixedly installed on one side of the circular retractable component.

[0011] In a preferred embodiment, the inner wall of the cylindrical component is airtightly slidably connected to the outer wall of the piston, and a crescent-shaped telescopic rod is fixedly installed at the other end of the piston. A fixing rod is fixedly installed at the other end of the crescent-shaped telescopic rod, and the two sides of the fixing rod are fixedly installed on the inner wall of the negative pressure pipe.

[0012] In a preferred embodiment, the piston has an inclined surface that does not contact one side of the limiting ring, while one end of the piston contacts one side of the limiting ring.

[0013] In a preferred embodiment, a circular fixing plate is fixedly installed on the inner wall of the first delivery pipe. One side of the circular fixing plate is fixedly installed on one side of the annular airbag. A support cylinder is fixedly installed on one side of the circular fixing plate. The support cylinder is located in the inner ring of the annular airbag. A concave groove is formed in a circular array on one side of the support cylinder.

[0014] A spring is fixedly installed in a circular array on one side of the annular fixing plate. The spring is located on the inner wall of the concave groove, and a convex plate is fixedly installed on the other end of the spring.

[0015] In a preferred embodiment, the outer wall of the support cylinder is provided with an annular extrusion plate and a horn cylinder. The inner ring of the horn cylinder is fixedly installed on one side of the convex plate, and a support rod is fixedly installed on one side of the horn cylinder. The other end of the support rod is fixedly installed on one side of the annular extrusion plate, and the annular extrusion plate can contact the outer wall of the annular airbag.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0017] I. This invention utilizes the cooperation between the annular retractable component, piston, inclined surface, limiting ring, vent pipe, and limiting ring. The piston automatically extends its length through the annular retractable component driven by the direction of liquid flow, making the piston unaffected by air pressure and liquid drive in the opening direction. When air pressure and liquid push occur in the opening direction, the piston is limited by the annular retractable component and cannot open the inner wall of the rectangular shell. When liquid is introduced into the rectangular shell, in order to avoid air pressure leakage, the air pressure can be squeezed to move in other directions by the inclined surface and the liquid level height in area A, thereby improving the functionality of the device.

[0018] Second, the present invention, through the cooperation between the circular fixing plate, the annular airbag, the spring, the annular squeezing plate and the horn, ensures that only when liquid flows into the pipe can the annular squeezing plate be driven to squeeze the annular airbag, thereby generating air pressure flow in the vent pipe. When the pipe is in the liquid discharge state, the annular airbag is prevented from being squeezed by the liquid flow due to the obstruction of the circular fixing plate, and the free movement of the annular squeezing plate is not affected, thus improving the practicality of the device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention:

[0021] Figure 2 Here is a refrigeration plan view of the heat pump air conditioning system of the present invention:

[0022] Figure 3 Here is a plan view of the heat pump air conditioning system of the present invention:

[0023] Figure 4 This is a three-dimensional structural diagram of the rectangular shell of the present invention:

[0024] Figure 5 This is a three-dimensional structural diagram of the negative pressure telescopic mechanism of the present invention:

[0025] Figure 6 This is a three-dimensional structural diagram of the negative pressure telescopic mechanism of the present invention:

[0026] Figure 7 Here is a plan view of the negative pressure telescopic mechanism of the present invention:

[0027] Figure 8 This is a schematic diagram of the internal three-dimensional structure of the delivery pipe of the present invention;

[0028] Figure 9 This is a schematic diagram of the three-dimensional structure of the annular extrusion plate of the present invention;

[0029] Figure 10 This is an internal plan view of the delivery pipe of the present invention.

[0030] Reference numerals: 1. Delivery pipe one; 10. Negative pressure pipe one; 11. Negative pressure pipe two; 12. Negative pressure pipe three; 13. Delivery pipe two; 14. One-way valve one; 15. One-way valve two; 16. Electronic expansion valve; 2. Negative pressure telescopic mechanism; 20. Rectangular shell one; 21. Cylindrical component; 22. Connecting rod; 23. Fixing ring; 24. Vent pipe; 25. Circular retraction component; 26. Piston; 27. Crescent-shaped telescopic rod; 28. Fixing rod; 29. ​​Limiting ring; 201. Inclined surface; 202. Rectangular shell two; 3. Circular fixing plate; 30. Annular airbag; 31. Support cylinder; 32. Concave groove; 33. Spring; 34. Convex plate; 35. Horn cylinder; 36. Support rod; 37. Annular extrusion plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] The present invention will be further described below with reference to embodiments.

[0033] Example: Refer to Figure 1 and Figures 4 to 7 This invention provides a technical solution: a refrigerant one-way valve switching pipeline of a heat pump air conditioning system, comprising: a delivery pipe 1 and a negative pressure telescopic mechanism 2. One end of the delivery pipe 1 is connected to a negative pressure pipe 10. The negative pressure telescopic mechanism 2 is disposed on the inner wall of the negative pressure pipe 10. The inner wall of the delivery pipe 1 is provided with an annular air bladder 30. The outer wall of the annular air bladder 30 is connected to a vent pipe 24. The outer wall of the vent pipe 24 penetrates and is fixedly installed on the outer wall of the delivery pipe 1. The other end of the vent pipe 24 is connected to a circular retractable member 25. The circular retractable member 25 can extend and retract to contact one end of a piston 26 in the negative pressure telescopic mechanism 2. The piston 26 is restricted between a limiting ring 29 and the circular retractable member 25 in the negative pressure telescopic mechanism 2. The piston 26 is located inside a rectangular shell 20 in the negative pressure telescopic mechanism 2, so that the negative pressure pipe 10 is in a connected state.

[0034] like Figure 2 and Figure 3As shown, the outer wall of negative pressure pipe 10 is connected to one-way valve 14. Negative pressure pipe 10 is n-shaped. Negative pressure pipe 10 is connected to negative pressure pipe 2 11 and negative pressure pipe 3 12 at both ends. Negative pressure pipe 2 11 is connected to electronic expansion valve 16 at its centerline. Negative pressure pipe 3 12 is U-shaped. Negative pressure pipe 3 12 is connected to delivery pipe 2 13 and one-way valve 2 15 at its outer wall. Rectangular shell 2 202 is fixedly installed on the outer wall of negative pressure pipe 3 12. The inner walls at both ends of negative pressure pipe 10 and negative pressure pipe 3 12 have low pressure and high pressure, respectively.

[0035] When the heat pump air conditioning system is cooling, refer to the appendix. Figure 2 As shown, high-pressure liquid is introduced into the delivery pipe 1, which squeezes the annular airbag 30 to drive the piston 26 to block the inner wall of the rectangular shell 20. At the same time, the liquid in the delivery pipe 1 also pushes the piston 26 to block the inner wall of the rectangular shell 20. Then the liquid enters the one-way valve 14, then enters zone C, and from zone C it enters the negative pressure pipe 21. Then it enters the area between zone B and zone E through the electronic expansion valve 16. Because the rectangular shell 20 has the annular airbag 30 driving the piston 26 to block the inner wall of the rectangular shell 20 and the hydraulic drive in the delivery pipe 1, the low pressure in zone B and zone E accumulates in zone B. The liquid enters zone E, and then enters the delivery pipe 23 through the blockage of the rectangular shell 202 and the one-way valve 25. Similarly, when heating is required, high-pressure liquid is introduced from the delivery pipe 23. Based on the above principle, the inner wall of the rectangular shell 202 is closed, and the inner wall of the rectangular shell 20 is opened and is not affected by the air pressure drive.

[0036] To clarify, check valve 15 and check valve 14 open in the same direction, with check valve 14 opening towards area C. Check valve 15 opens towards area D. (See attached diagram.) Figure 2 and attached Figure 3 As shown, the shaded areas in regions B, C, E, and D are locations where air pressure accumulates. The inner wall structures of rectangular shell 1 20 and rectangular shell 2 202 are the same.

[0037] like Figures 4 to 7 As shown, the negative pressure telescopic mechanism 2 includes a rectangular shell 20 connected to the outer wall of the negative pressure pipe 10. A connecting rod 22 is fixedly installed on the inner wall of the rectangular shell 20. A cylindrical component 21 is fixedly installed on one side of the connecting rod 22. The cylindrical component 21 and the rectangular shell 20 are connected to the negative pressure pipe 10. A fixing ring 23 is fixedly installed at one end of the cylindrical component 21 near the conveying pipe 1. One side of the fixing ring 23 is fixedly installed on one side of the annular shrinking component 25. The inner wall of the cylindrical component 21 is airtightly slidably connected to the outer wall of the piston 26. A crescent-shaped telescopic rod 27 is fixedly installed at the other end of the piston 26. A fixing rod 28 is fixedly installed at the other end of the crescent-shaped telescopic rod 27. Both sides of the fixing rod 28 are fixedly installed on the inner wall of the negative pressure pipe 10. The piston 26 has an inclined surface 201. The inclined surface 201 does not contact one side of the limiting ring 29. One end of the piston 26 contacts one side of the limiting ring 29.

[0038] Reference Appendix Figure 2 As shown, when the liquid enters between zone B and zone E, some air pressure in zone B will push one end of piston 26. However, due to the extension of the annular contraction member 25 restricting the movement space of piston 26, and the connection between delivery pipe 1 and negative pressure pipe 10, piston 26 will also be pushed towards the fixed rod 28. This causes piston 26 in rectangular shell 20 to contact one side of the limiting ring 29 and not open the inner wall of rectangular shell 20. In contrast, there is no resistance in zone E, and the liquid can open the inner wall of rectangular shell 202 and finally flow into delivery pipe 213. Similarly, when high-pressure liquid is introduced into delivery pipe 213, rectangular shell 202 works in the same way as rectangular shell 20 during refrigeration.

[0039] As attached Figure 7 As shown, when liquid is first introduced into the negative pressure pipe 10 in area A, the shape of the liquid at the front end is a triangle in area A. In order to prevent the air pressure in the pipe from being released to the outside for a short period of time after the liquid opens the rectangular shell 20, causing air pressure loss in the pipe, the inclined surface 201 is used to allow the liquid in area A to enter the inner wall of the rectangular shell 20. The air pressure above area A cannot enter the inner wall of the rectangular shell 20. Subsequently, the liquid level will gradually increase until it fills the inner wall of the negative pressure pipe 10, thereby causing the air pressure above area A to move in other directions and improving the service life of the equipment.

[0040] To explain, in order to avoid frequent use of the device, which may cause the piston 26 to rotate and the inclined surface 201 to not be at its lowest point, resulting in air pressure leakage, the piston 26 is limited to prevent it from rotating by the crescent-shaped telescopic rod 27.

[0041] like Figures 8 to 10 As shown, a circular fixing plate 3 is fixedly installed on the inner wall of the delivery pipe 1. One side of the circular fixing plate 3 is fixedly installed on one side of the annular airbag 30. A support cylinder 31 is fixedly installed on one side of the circular fixing plate 3. The support cylinder 31 is located in the inner ring of the annular airbag 30. A concave groove 32 is opened in a circular array on one side of the support cylinder 31. A spring 33 is fixedly installed in a circular array on one side of the circular fixing plate 3. The spring 33 is located in the inner wall of the concave groove 32. A convex plate 34 is fixedly installed at the other end of the spring 33. An annular extrusion plate 37 and a trumpet 35 are provided on the outer wall of the support cylinder 31. The inner ring of the trumpet 35 is fixedly installed on one side of the convex plate 34. A support rod 36 is fixedly installed on one side of the trumpet 35. The other end of the support rod 36 is fixedly installed on one side of the annular extrusion plate 37. The annular extrusion plate 37 can contact the outer wall of the annular airbag 30.

[0042] Reference Appendix Figure 2As shown, when low-pressure liquid enters the inner wall of the delivery pipe 1, the shape of the horn 35 can collect the liquid into the inner ring of the support cylinder 31, and the shape of the horn 35 will be subject to more liquid flow thrust, causing the horn 35 to drive the annular extrusion plate 37 to move towards the annular airbag 30 and generate the first elastic potential energy. At the same time, it extrudes the annular airbag 30, causing the air pressure inside the annular airbag 30 to move into the circular contraction member 25 through the vent pipe 24, causing the circular contraction member 25 to automatically extend its length. When no more liquid enters the delivery pipe 1, the first elastic potential energy will drive the spring 33 to extend its length and drive the annular extrusion plate 37 away from the annular airbag 30.

[0043] When liquid is introduced into the second delivery pipe 13 and the liquid in the first delivery pipe 1 is in the discharge state, the liquid cannot compress the volume of the annular airbag 30 due to the resistance of the annular fixing plate 3, and at the same time, it cannot drive the annular extrusion plate 37 to move. When the first delivery pipe 1 is in the discharge state, the rectangular shell 20 is in the open state, and the piston 26 will automatically squeeze the annular contraction member 25. The annular contraction member 25 shortens its length, and the air pressure in the annular contraction member 25 will automatically move into the annular airbag 30, so that the volume of the annular airbag 30 returns to its original state.

[0044] Working principle: When the heat pump air conditioning system is cooling, refer to the attached... Figure 2 As shown, high-pressure liquid is introduced into the delivery pipe 1, which will squeeze the annular airbag 30 to drive the piston 26 to block the inner wall of the rectangular shell 20. At the same time, the liquid in the delivery pipe 1 will also push the piston 26 to block the inner wall of the rectangular shell 20. Then the liquid enters the one-way valve 14, then enters the C area, and from the C area enters the negative pressure pipe 2 11. Then it enters the area between the B area and the E area through the electronic expansion valve 16. Then the low pressure accumulates in the B area, and the liquid enters the E area. Then it enters the delivery pipe 2 13 through the blockage of the rectangular shell 2 202 and the one-way valve 2 15.

[0045] When the liquid enters between zone B and zone E, some air pressure in zone B will push one end of piston 26. However, due to the extension of the annular contraction member 25 restricting the movement space of piston 26, and the connection between delivery pipe 1 and negative pressure pipe 10, piston 26 will also be pushed towards the fixed rod 28. As a result, piston 26 in rectangular shell 20 will contact one side of the limiting ring 29 and will not open the inner wall of rectangular shell 20. In contrast, there is no resistance in zone E, and the liquid can open the inner wall of rectangular shell 202 and finally flow into delivery pipe 2 13.

[0046] When liquid is first introduced into rectangular shell 202, the shape of the liquid front end is a triangle in area A. The inclined surface 201 prevents the liquid surface in area A from entering the inner wall of rectangular shell 202. The air pressure above area A cannot enter the inner wall of rectangular shell 202. Subsequently, the liquid level will gradually increase until it fills the inner wall of negative pressure pipe 10, thereby causing the air pressure above area A to move in other directions.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reversing line for a refrigerant check valve of a heat pump air conditioning system, characterized by comprising: include: The conveying pipe (1) and the negative pressure telescopic mechanism (2) are provided. One end of the conveying pipe (1) is connected to the negative pressure pipe (10). The negative pressure telescopic mechanism (2) is provided on the inner wall of the negative pressure pipe (10). The inner wall of the conveying pipe (1) is provided with an annular airbag (30). The outer wall of the annular airbag (30) is connected to a venting pipe (24). The outer wall of the venting pipe (24) passes through and is fixedly installed on the outer wall of the conveying pipe (1). The other end of the venting pipe (24) is connected to a circular retractable element (25). The circular retractable member (25) can extend and retract to contact one end of the piston (26) in the negative pressure telescopic mechanism (2). The piston (26) is restricted between the limiting ring (29) and the circular retractable member (25) in the negative pressure telescopic mechanism (2). The piston (26) is located inside the rectangular shell (20) in the negative pressure telescopic mechanism (2), so that the negative pressure tube (10) is in a connected state. The outer wall of the negative pressure pipe 1 (10) is connected to a one-way valve 1 (14), the two ends of the negative pressure pipe 1 (10) are connected to a negative pressure pipe 2 (11) and a negative pressure pipe 3 (12), the center line of the negative pressure pipe 2 (11) is connected to an electronic expansion valve (16); the outer wall of the negative pressure pipe 3 (12) is connected to a delivery pipe 2 (13) and a one-way valve 2 (15).

2. The heat pump air conditioning system refrigerant check valve reversing line of claim 1, wherein: The first negative pressure pipe (10) is n-shaped, the third negative pressure pipe (12) is u-shaped, and a rectangular shell (202) is fixedly installed on the outer wall of the third negative pressure pipe (12). The inner walls of the two ends of the negative pressure tube one (10) and the negative pressure tube three (12) have low air pressure and high air pressure, respectively.

3. The heat pump air conditioning system refrigerant check valve reversing line of claim 1, wherein: The negative pressure telescopic mechanism (2) includes a rectangular shell (20) connected to the outer wall of the negative pressure pipe (10). A connecting rod (22) is fixedly installed on the inner wall of the rectangular shell (20). A cylindrical component (21) is fixedly installed on one side of the connecting rod (22). The cylindrical component (21) and the rectangular shell (20) are connected to the negative pressure pipe (10). A fixing ring (23) is fixedly installed at one end of the cylindrical component (21) near the conveying pipe (1). One side of the fixing ring (23) is fixedly installed on one side of the circular shrinking component (25).

4. The heat pump air conditioning system refrigerant check valve reversing line of claim 3, wherein: The inner wall of the cylindrical component (21) is airtightly slidably connected to the outer wall of the piston (26). A crescent-shaped telescopic rod (27) is fixedly installed at the other end of the piston (26). A fixing rod (28) is fixedly installed at the other end of the crescent-shaped telescopic rod (27). Both sides of the fixing rod (28) are fixedly installed on the inner wall of the negative pressure pipe (10).

5. The heat pump air conditioning system refrigerant check valve reversing line of claim 4, wherein: The piston (26) has an inclined surface (201) that does not contact one side of the limiting ring (29), and one end of the piston (26) contacts one side of the limiting ring (29).

6. The refrigerant one-way valve reversing pipeline of the heat pump air conditioning system according to claim 1, characterized in that: A circular fixing plate (3) is fixedly installed on the inner wall of the delivery pipe (1). One side of the circular fixing plate (3) is fixedly installed on one side of the annular airbag (30). A support cylinder (31) is fixedly installed on one side of the circular fixing plate (3). The support cylinder (31) is located in the inner ring of the annular airbag (30). A concave groove (32) is opened in a circular array on one side of the support cylinder (31). A spring (33) is fixedly installed in a circular array on one side of the ring fixing plate (3). The spring (33) is located on the inner wall of the concave groove (32). A convex plate (34) is fixedly installed at the other end of the spring (33).

7. The refrigerant one-way valve reversing pipeline of the heat pump air conditioning system according to claim 6, characterized in that: The outer wall of the support cylinder (31) is provided with an annular extrusion plate (37) and a horn cylinder (35). The inner ring of the horn cylinder (35) is fixedly installed on one side of the convex plate (34). A support rod (36) is fixedly installed on one side of the horn cylinder (35). The other end of the support rod (36) is fixedly installed on one side of the annular extrusion plate (37). The annular extrusion plate (37) can contact the outer wall of the annular airbag (30).

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