CN216242534U - High-precision bidirectional throttle valve assembly - Google Patents

Abstract

The utility model discloses a high-precision bidirectional throttle valve assembly which comprises a valve body, a valve core, an opening A and an opening B, wherein the opening B is provided with a capillary tube, the valve core is of a magnetic structure, a spring is connected between one end of the valve core close to the opening A and the valve body, the valve body is provided with an electromagnet at the opening B, and the valve core moves towards the opening B when the electromagnet is electrified. When the air conditioner heats, the refrigerant flows from the port B to the port A, the electromagnet is electrified to enable the valve core to move towards the port B, and a capillary flow passage with the diameter smaller than that of the capillary tube is formed between the valve core and the bottom of the inner wall of the valve body, so that the air conditioner is suitable for heating with a higher compression ratio. When the air conditioner refrigerates, the refrigerant flows from the port A to the port B, the electromagnet is not electrified, the valve core is close to the port A under the action of the spring, the diameter of a flow passage at the bottom of the valve core and the inner wall of the valve body is increased, the compression ratio at the moment is reduced, and the air conditioner is suitable for the lower compression ratio of refrigeration. The bidirectional throttle valve component can realize the bidirectional throttle effect only by one valve body, can adapt to two states of refrigeration and heating, and has small volume and small installation space.

Description

High precision two-way throttle valve assembly

technical field

The utility model belongs to the field of refrigeration, in particular to a high-precision two-way throttle valve assembly.

Background technique

A throttle valve is a valve that controls fluid flow by changing the throttling section or throttling length. Most of the opening and closing parts of the throttle valve are conical streamline, through which the flow and pressure can be adjusted by changing the cross-sectional area of the passage. In the refrigeration system, a throttle valve is set between the low-pressure evaporator and the high-pressure condenser to throttle and adjust the flow.

The existing two-way throttle valve is mostly composed of two one-way throttle valves, which is larger than the one-way throttle valve and requires a certain installation space. In addition, the existing air conditioner has both cooling and heating effects, and since the compression ratio of the heating operation is greater than the compression ratio of the cooling operation, capillaries of different diameters are required.

Utility model content

The purpose of the utility model is to provide a high-precision two-way throttle valve assembly, which can realize the effect of two-way throttle with only one valve body, can adapt to two states of cooling and heating, and has small volume and small installation space.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

High-precision two-way throttle valve assembly, including valve body, valve core, A port and B port, B port is provided with a capillary tube, the valve core is a magnetic structure, and a spring is connected between the end of the valve core near the A port and the valve body. The body is provided with an electromagnet at the B port, and the valve core moves to the B port when the electromagnet is energized.

When the air conditioner is heating, the refrigerant flows from port B to port A, the electromagnet is energized to attract the magnetic valve core to move to port B, the valve core and the bottom of the valve inner wall form a capillary flow channel with a diameter smaller than the capillary tube, thus adapting to the system Thermally higher compression ratio. When the air conditioner is refrigerating, the refrigerant flows from port A to port B, the electromagnet is not energized, the valve core is close to port A under the action of the spring, the diameter of the flow channel between the valve core and the bottom of the valve inner wall becomes larger, and the compression at this time ratio is reduced to accommodate the lower compression ratio of refrigeration.

Further, a limit rod is arranged in the spring, the limit rod is fixed on the top of the inner wall of the valve body, and the valve core is in contact with the limit rod when it is close to the A port. The limit rod is against the valve core, limiting the minimum flow channel diameter between the valve core and the top of the valve body wall.

Further, the bottom of the inner wall of the valve body is provided with a limit block, and the valve core is in contact with the limit block when it is close to the B port. The stopper prevents the spool from completely blocking the capillary, limiting the diameter of the capillary flow path.

Further, a support ring is provided in the valve body, the valve core is placed in the support ring, and the support ring is provided with evenly distributed openings. The support ring supports the valve core, the valve core moves horizontally in the support ring, and the refrigerant flows through the opening.

Further, the valve core is provided with a tapered part near the B port. The tapered part can reduce the area of the runner cross-section and further improve the compression ratio.

Further, the tapered portion may extend into the capillary, the smallest diameter of the tapered portion being smaller than the diameter of the capillary. The tapered part extends into the capillary to form an annular flow channel, which can further improve the compression ratio.

Owing to adopting the above-mentioned technical scheme, the utility model has the following beneficial effects:

When the air conditioner is heating, the refrigerant flows from port B to port A, the electromagnet is energized to attract the magnetic valve core to move to port B, the valve core and the bottom of the valve inner wall form a capillary flow channel with a diameter smaller than the capillary tube, thus adapting to the system Thermally higher compression ratio. When the air conditioner is refrigerating, the refrigerant flows from port A to port B, the electromagnet is not energized, the valve core is close to port A under the action of the spring, the diameter of the flow channel between the valve core and the bottom of the valve inner wall becomes larger, and the compression at this time ratio is reduced to accommodate the lower compression ratio of refrigeration.

The limit rod is against the valve core, limiting the minimum flow channel diameter between the valve core and the top of the valve body wall. The stopper prevents the spool from completely blocking the capillary, limiting the diameter of the capillary flow path. The stopper prevents the spool from completely blocking the capillary, limiting the diameter of the capillary flow path. The tapered part extends into the capillary to form an annular flow channel, which can further improve the compression ratio.

Description of drawings

The utility model will be further described below according to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a high-precision two-way throttle valve assembly during air conditioning refrigeration;

FIG. 2 is a schematic structural diagram of a high-precision two-way throttle valve assembly during heating of an air conditioner.

Detailed ways

High-precision two-way throttle valve assembly, including valve body 1, valve core 2, A port and B port, the B port is provided with a capillary 3, the valve core 2 is a magnetic structure, the end of the valve core 2 close to the A port and the valve body 1. A spring 4 is connected between them, and an electromagnet 5 is provided at the B port of the valve body 1 .

A limit rod 6 is arranged in the spring 4, the limit rod 6 is fixed on the top of the inner wall of the valve body 1, and the valve core 2 is in contact with the limit rod 6 when it is close to the A port. The limit rod 6 presses against the valve core 2 to limit the minimum flow channel diameter between the valve core 2 and the top of the inner wall of the valve body 1 . The bottom of the inner wall of the valve body 1 is provided with a limit block 7, and the valve core 2 is in contact with the limit block 7 when it is close to the B port. The limiting block 7 prevents the valve core 2 from completely blocking the capillary tube 3 and limits the diameter of the capillary flow channel 8 .

The valve body 1 is provided with a support ring 9 , the valve core 2 is placed in the support ring 9 , and the support ring 9 is provided with evenly distributed openings 10 . The support ring 9 supports the valve core 2 , the valve core 2 moves horizontally in the support ring 9 , and the refrigerant flows through the opening 10 . The valve core 2 is provided with a tapered portion 11 near the port B, the tapered portion can extend into the capillary 3 , and the minimum diameter of the tapered portion 11 is smaller than the diameter of the capillary 3 . The tapered portion 11 extends into the capillary 3 to form an annular flow channel, which can further improve the compression ratio.

As shown in Figure 1, when the air conditioner is refrigerating, the refrigerant flows from port A to port B, the electromagnet 5 is not energized, the valve core 2 is close to the A port in the support ring 9 under the action of the spring 4, and the valve core 2 is against the The limit rod 6, the valve core 2 and the flow channel at the bottom of the inner wall of the valve body 1 have larger diameters and lower compression ratios, which are suitable for the lower compression ratio of refrigeration.

As shown in FIG. 2 , when the air conditioner is heating, the refrigerant flows from port B to port A, and the electromagnet 5 is energized to attract the magnetic valve core 2 to move to port B in the support ring 9 , and the valve core 2 abuts the limit block 7 , the valve core 2 and the bottom of the inner wall of the valve body 1 form a capillary flow channel 8 with a diameter smaller than that of the capillary tube 3, and the tapered part 11 at the bottom of the valve core 2 extends into the capillary tube 3 to form an annular flow channel, which can further improve the compression ratio and adapt to the Higher compression ratio for heating.

The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made on the basis of the present invention in order to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims (6)

1. High-precision two-way throttle valve assembly, including valve body, valve core, A port and B port, the B port is provided with a capillary, characterized in that: the valve core is a magnetic structure, and the valve core is close to the A spring is connected between one end of the A port and the valve body, the valve body is provided with an electromagnet at the B port, and the valve core moves toward the B port when the electromagnet is energized. 2 . The high-precision two-way throttle valve assembly according to claim 1 , wherein the spring is provided with a limit rod, the limit rod is fixed on the top of the inner wall of the valve, and the valve core is close to the valve core. 3 . When the A port is in contact with the limit rod. 3 . The high-precision two-way throttle valve assembly according to claim 1 , wherein a limit block is provided at the bottom of the inner wall of the valve body, and the valve core is in contact with the limit block when it is close to the B port. 4 . 4. The high-precision two-way throttle valve assembly according to claim 1, characterized in that: the valve body is provided with a support ring, the valve core is placed in the support ring, and the support ring is provided with evenly distributed Open your mouth. 5 . The high-precision two-way throttle valve assembly according to claim 1 , wherein the valve core is provided with a tapered portion near the B port. 6 . 6 . The high-precision two-way throttle valve assembly according to claim 5 , wherein the tapered portion can extend into the capillary tube, and the minimum diameter of the tapered portion is smaller than the diameter of the capillary tube. 7 .

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