A quick cold-heat switching pipeline structure for a vehicle refrigerating machine

Abstract

The utility model relates to a car air conditioning technical field especially a quick cold and hot switching pipeline structure for vehicle refrigerating machine, including installation box, the front side of installation box is installed with the apron through bolt, the front side of apron is installed with the plate heat exchanger through bolt, the front side of plate heat exchanger is installed with expansion valve, the top and bottom of installation box left side are installed with condenser connection pipe and compressor back gas connection pipe respectively, the top and bottom of compressor back gas connection pipe inboard are installed with third solenoid valve and fourth solenoid valve respectively. The utility model discloses a set of valve body assembly is formed by first solenoid valve, second solenoid valve, third solenoid valve and fourth solenoid valve instead of four -way reversing valve, response time is far faster than mechanical four -way reversing valve, realizes millisecond level mode switching, and the operation is more stable, and the integration is higher, and the overall structure is more compact, and can be individually replaced and maintained, reduces the use cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning technology, specifically to a rapid cooling and heating switching pipeline structure for automotive refrigeration units. Background Technology

[0002] An automotive air conditioning system is a device used to regulate the air environment inside a vehicle. It improves driving comfort and reduces driver fatigue through cooling, heating, ventilation, and purification functions. Its core consists of a cooling system, a heating system, a ventilation device, an air purification module, and a control system, which can precisely regulate temperature and humidity and achieve air circulation and filtration.

[0003] Currently, automotive refrigeration units (heat pump air conditioners) typically use a four-way reversing valve to change the refrigerant flow direction during the switching between cooling and heating modes. The movement of the valve core within the four-way reversing valve takes time, resulting in a delay in mode switching and a poor user experience. During switching, the sudden change in refrigerant flow path can cause system pressure fluctuations, impacting components such as the compressor and affecting their lifespan. Furthermore, the four-way valve has a complex structure, high cost, internal leakage risk, and may jam in low-temperature environments. Traditional layouts for connecting the four-way valve involve complex piping routes, increasing welding points and leakage risks. To address these technical issues, we have designed a rapid cooling / heating switching piping structure for automotive refrigeration units. Utility Model Content

[0004] The purpose of this utility model is to provide a rapid hot and cold switching pipeline structure for automotive refrigeration units, which has the advantages of fast switching speed, more stable and reliable operation, more compact structure, better sealing performance, and reduced maintenance and replacement costs. It solves the problems of switching delay, thermal shock, and reduced service life of refrigeration components caused by the traditional use of four-way valves, as well as the high maintenance and replacement costs, complex connection pipeline routing, and increased risk of welding points and leakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid cooling and heating switching pipeline structure for an automotive refrigeration unit, comprising an installation box, a cover plate bolted to the front of the installation box, a plate heat exchanger bolted to the front of the cover plate, an expansion valve bolted to the front of the plate heat exchanger, a drying bottle bolted to the top of the installation box, a condenser pipe and a compressor return gas pipe respectively installed through the top and bottom of the left side of the installation box, a third solenoid valve and a fourth solenoid valve respectively installed at the top and bottom of the inner side of the compressor return gas pipe, a compressor exhaust pipe, an evaporator pipe and a plate heat exchanger pipe respectively installed through the upper and lower sides and the middle of the right side of the installation box, a first solenoid valve and a second solenoid valve respectively installed at the top and bottom of the inner side of the compressor exhaust pipe, and a connecting pipe connected to the left side of the second solenoid valve.

[0006] Preferably, the installation box includes a box body, the outer surface of which is provided with ventilation openings, and positioning plates are welded to the rear sides of the four corners of the box body.

[0007] Preferably, the left side of the first solenoid valve is connected to the condenser pipe, and the right side of the third solenoid valve is connected to the heat exchanger pipe.

[0008] Preferably, the right side of the fourth solenoid valve is connected to the evaporator tube, and the side of the connecting pipe away from the second solenoid valve is connected to the inside of the evaporator tube.

[0009] Preferably, the outer side of the heat exchanger pipe is connected to a first flexible hose, and the other end of the first flexible hose is connected to an expansion valve.

[0010] Preferably, the outlet end of the drying bottle is connected to a second hose, and the other end of the second hose is connected to an expansion valve.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention replaces the four-way directional valve with a valve body assembly consisting of a first solenoid valve, a second solenoid valve, a third solenoid valve, and a fourth solenoid valve. The response time is much faster than that of the mechanical four-way directional valve, achieving millisecond-level mode switching. At the same time, the operation is more stable, the integration is higher, the overall structure is more compact, and it can be replaced and maintained individually, reducing the cost of use. Attached Figure Description

[0013] Figure 1 This is an axonometric view of the structure of this utility model;

[0014] Figure 2 This is an internal axonometric view of the housing of this utility model;

[0015] Figure 3 This is a rear axonometric view of the structure of this utility model.

[0016] In the diagram: 1. Mounting box; 2. Cover plate; 3. Plate heat exchanger; 4. Expansion valve; 5. First hose; 6. Compressor exhaust pipe; 7. Dryer bottle; 8. Second solenoid valve; 9. Third solenoid valve; 10. Fourth solenoid valve; 11. Evaporator pipe; 12. Plate heat exchanger pipe; 13. Condenser pipe; 14. Connecting pipe; 15. Compressor return gas pipe; 16. Positioning plate; 17. Vent; 18. Box body; 19. First solenoid valve; 20. Second hose. Detailed Implementation

[0017] Please see Figures 1-3A rapid heating and cooling switching piping structure for automotive refrigeration units includes a mounting box 1. A cover plate 2 is bolted to the front of the mounting box 1, allowing easy access to the internal valve assembly for inspection and replacement. A plate heat exchanger 3 is bolted to the front of the cover plate 2, and an expansion valve 4 is bolted to the front of the plate heat exchanger 3. The expansion valve 4 throttles and reduces pressure, regulates flow, and precisely controls the refrigerant flow into the evaporator, ensuring optimal evaporator utilization. A desiccant bottle 7 is bolted to the top of the mounting box 1. The desiccant bottle 7 primarily serves to… The filtration, drying and liquid storage functions are located between the condenser outlet and the expansion valve 4 inlet. The top and bottom of the left side of the mounting box 1 are respectively connected to the condenser pipe 13 and the compressor return pipe 15. The top and bottom of the inner side of the compressor return pipe 15 are respectively connected to the third solenoid valve 9 and the fourth solenoid valve 10. The upper and lower sides and the middle part of the right side of the mounting box 1 are respectively connected to the compressor exhaust pipe 6, the evaporator pipe 11 and the plate heat exchanger pipe 12. The top and bottom of the inner side of the compressor exhaust pipe 6 are respectively connected to the first solenoid valve 19 and the second solenoid valve 8. The left side of the second solenoid valve 8 is connected to the connecting pipe 14.

[0018] Please see Figure 3 The installation box 1 includes a box body 18. Ventilation openings 17 are provided on the outer surface of the box body 18. Positioning plates 16 are welded to the rear sides of the four corners of the box body 18. By setting the positioning plates 16, the box body 18 can be easily installed and fixed.

[0019] Please see Figure 2 The left side of the first solenoid valve 19 is connected to the condenser pipe 13, and the right side of the third solenoid valve 9 is connected to the plate heat exchanger pipe 12. The first solenoid valve 19, the second solenoid valve 8, the third solenoid valve 9 and the fourth solenoid valve 10 are all stainless steel valve bodies, suitable for R134a refrigerant, working pressure range 0.3~4.2MPa, DC12V drive, IP67 protection rating.

[0020] Please see Figure 2 The right side of the fourth solenoid valve 10 is connected to the evaporator tube 11, and the side of the connecting pipe 14 away from the second solenoid valve 8 is connected to the inside of the evaporator tube 11.

[0021] Please see Figure 1 The outer side of the heat exchanger pipe 12 is connected to the first hose 5, and the other end of the first hose 5 is connected to the expansion valve 4.

[0022] Please see Figure 3 The outlet of the drying bottle 7 is connected to a second hose 20, and the other end of the second hose 20 is connected to the expansion valve 4.

[0023] During operation, the cooling process is as follows: the high-temperature, high-pressure refrigerant gas discharged from the compressor enters the valve assembly inside the mounting box 1 through the compressor exhaust pipe 6. At this time, the first solenoid valve 19 and the fourth solenoid valve 10 are opened, and the second solenoid valve 8 and the third solenoid valve 9 are closed. The refrigerant flows through the first solenoid valve 19, through the condenser pipe 13 into the condenser, then into the dryer bottle 7, and then into the evaporator through the expansion valve 4. The refrigerant evaporates and absorbs heat in the evaporator, and the evaporator fan blows the cold air into the passenger compartment. Finally, it flows back to the valve assembly inside the mounting box 1 through the evaporator pipe 11 and flows through the fourth solenoid valve 10 and back to the compressor suction end through the compressor return pipe 15, completing the refrigeration cycle. The heating process is as follows: the high-temperature, high-pressure refrigerant gas discharged from the compressor enters the valve assembly inside the mounting box 1 through the compressor exhaust pipe 6. At this time, the first solenoid valve 19 is closed. With the fourth solenoid valve 10, the second solenoid valve 8 and the third solenoid valve 9 are opened. The refrigerant flows through the second solenoid valve 8 and the connecting pipe 14, and enters the evaporator through the evaporator box pipe 11. The heat generated by the refrigerant in the evaporator is blown to the passenger compartment by the evaporator fan, and then enters the dryer bottle 7. From the dryer bottle 7, it enters the plate heat exchanger 3, and finally flows back to the valve assembly in the mounting box 1 through the first hose 5 and the plate heat exchanger pipe 12. Finally, it flows through the third solenoid valve 9 and returns to the compressor suction end through the compressor return pipe 15, completing the heating cycle. The above set of four controlled solenoid valves replaces the traditional four-way reversing valve. The response time is much faster than that of the mechanical four-way reversing valve, achieving millisecond-level mode switching. At the same time, the operation is more stable, the integration is higher, the overall structure is more compact, and it can be replaced and maintained individually, reducing the cost of use.

[0024] In summary, this rapid heating and cooling switching piping structure for automotive refrigeration units, through the coordinated use of mounting box 1, plate heat exchanger 3, expansion valve 4, first hose 5, second solenoid valve 8, third solenoid valve 9, fourth solenoid valve 10, and first solenoid valve 19, solves the problems of switching delay, thermal shock, reduced service life of refrigeration components, high maintenance and replacement costs, complex piping routing, and increased risk of welding points and leaks associated with traditional four-way valves.

Claims

1. A rapid cooling and heating switching piping structure for automotive refrigeration units, comprising a mounting box (1), characterized in that: The front side of the installation box (1) is bolted with a cover plate (2), the front side of the cover plate (2) is bolted with a plate heat exchanger (3), the front side of the plate heat exchanger (3) is bolted with an expansion valve (4), the top of the installation box (1) is bolted with a dryer bottle (7), the top and bottom of the left side of the installation box (1) are respectively connected with a condenser pipe (13) and a compressor return pipe (15), the top and bottom of the inner side of the compressor return pipe (15) are respectively connected with a third solenoid valve (9) and a fourth solenoid valve (10), the upper and lower sides and the middle part of the right side of the installation box (1) are respectively connected with a compressor exhaust pipe (6), an evaporator pipe (11) and a plate heat exchanger pipe (12), the top and bottom of the inner side of the compressor exhaust pipe (6) are respectively connected with a first solenoid valve (19) and a second solenoid valve (8), and the left side of the second solenoid valve (8) is connected with a connecting pipe (14).

2. The rapid cooling and heating switching pipeline structure for an automotive refrigeration unit according to claim 1, characterized in that: The installation box (1) includes a box body (18), and the outer surface of the box body (18) is provided with ventilation openings (17). Positioning plates (16) are welded to the rear sides of the four corners of the box body (18).

3. The rapid cooling and heating switching pipeline structure for an automotive refrigeration unit according to claim 1, characterized in that: The left side of the first solenoid valve (19) is connected to the condenser pipe (13), and the right side of the third solenoid valve (9) is connected to the plate heat exchanger pipe (12).

4. The rapid cooling and heating switching pipeline structure for an automotive refrigeration unit according to claim 1, characterized in that: The right side of the fourth solenoid valve (10) is connected to the evaporator tube (11), and the side of the connecting pipe (14) away from the second solenoid valve (8) is connected to the inside of the evaporator tube (11).

5. A rapid cooling and heating switching pipeline structure for an automotive refrigeration unit according to claim 1, characterized in that: The outer side of the plate heat exchanger connector (12) is connected to a first hose (5), and the other end of the first hose (5) is connected to an expansion valve (4).

6. The rapid cooling and heating switching pipeline structure for an automotive refrigeration unit according to claim 1, characterized in that: The outlet of the drying bottle (7) is connected to a second hose (20), and the other end of the second hose (20) is connected to the expansion valve (4).

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