Valve pipeline assembly and air conditioner

Abstract

The present disclosure provides a valve pipeline assembly and an air conditioner, the valve pipeline assembly includes: a pipeline and a valve assembly, the valve assembly is arranged in the pipeline, and the valve assembly includes a shaft body and a blocking part, the blocking part is arranged on the shaft body, and the shaft body is arranged near the exhaust port of the compressor relative to the blocking part, and the blocking part is arranged near the condenser relative to the shaft body, when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking part is pushed to close the channel of the pipeline. According to the present disclosure, the check structure in the prior art is reversely assembled, when the pressure on the condenser side is greater than the pressure on the exhaust port of the compressor, the pressure on the condenser side will push the blocking part to move and effectively close the channel of the pipeline, which solves the problem of the conventional air conditioner causing the rotor to collide with the shaft and displace due to the gas reflux into the compressor during the shutdown process, and improves the reliability of the rotor of the air conditioner during the shutdown process.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning, and in particular to a valve pipeline assembly and an air conditioner. Background Art

[0002] At present, magnetic levitation centrifuges are widely used in large cooling places such as universities, hotels, and industries. Their unique advantages of low noise and high efficiency are very popular among users. The core technology of magnetic levitation centrifuges lies in magnetic rotor control. The impact of some airflows can easily cause rotor displacement protection. For example, the exhaust volume of the magnetic levitation centrifuge will gradually decrease during the shutdown process. When the exhaust pressure is lower than the condensing pressure, the condensed gaseous refrigerant will flow back and impact the magnetic rotor, causing displacement or shaft collision protection.

[0003] The commonly used solution at present is to add a check valve to the exhaust pipe to prevent the high-pressure gaseous refrigerant from impacting the rotor during shutdown. The refrigerant is only allowed to be discharged in the forward direction to prevent reverse backflow. However, adding a check valve will reduce the energy efficiency of the unit. When exhausting, pressure is required to open the compression spring of the fixed part, which will cause pressure loss. In addition, the gaseous refrigerant passing through the check valve will be throttled, the flow rate will be reduced, and there will be continuous pressure loss. Both phenomena will lead to a decrease in the energy efficiency of the unit. Therefore, it is necessary to develop a solution that takes both reliability and energy efficiency into consideration.

[0004] Due to technical problems such as the problem of gas reflux during shutdown of conventional magnetic levitation centrifuges in the prior art causing rotor displacement due to impact with the shaft, the problem of pressure loss caused by the spring required to open a conventional check valve, and the problem of energy efficiency degradation caused by exhaust pressure loss caused by throttling of gaseous refrigerant through a conventional check valve, the present invention discloses a valve pipeline assembly and an air conditioner.

[0005] Public Content

[0006] Therefore, the technical problem to be solved by the present disclosure is to overcome the defect of conventional magnetic levitation centrifuges in the prior art that gas reflux causes rotor displacement during shutdown, thereby providing a valve pipeline assembly and an air conditioner.

[0007] In order to solve the above problems, the present disclosure provides a valve pipeline assembly, which includes:

[0008] A pipeline and a valve assembly, wherein the valve assembly is arranged in the pipeline, and the valve assembly includes a shaft body and a blocking portion, the blocking portion is arranged on the shaft body, and the shaft body is arranged close to the exhaust port of the compressor relative to the blocking portion, and the blocking portion is arranged close to the condenser relative to the shaft body, and when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking portion is pushed to close the channel of the pipeline.

[0009] In some embodiments, the shaft can move along the axial direction of the pipeline. When the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the shaft and the blocking portion are pushed along the axial direction of the pipeline and move toward the exhaust port of the compressor. At the same time, the blocking portion can also be pushed to rotate, thereby closing the channel of the pipeline.

[0010] In some embodiments, a rotating shaft component is provided at the position where the blocking portion is connected to the shaft body, so that the blocking portion can rotate around the rotating shaft component.

[0011] In some embodiments, when the blocking portion rotates around the rotating shaft component toward the direction of the shaft body, there is a limit stop position, and when the blocking portion rotates to the limit stop position, the blocking portion is restricted from rotating toward the direction of the shaft body.

[0012] In some embodiments, the blocking portion is a straight plate structure, and the limit locking position is a position where the plate surface direction of the blocking portion is perpendicular to the axial direction of the pipeline. This position is the position of the blocking portion when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor. At this time, the gas refluxed from the condenser reaches the blocking portion and is blocked and will not flow back to the exhaust port of the compressor.

[0013] In some embodiments, the blocking portion is a straight plate structure, and when the blocking portion can also rotate around the rotating shaft component in the direction opposite to the shaft body to a position where the plate surface direction of the blocking portion is parallel to the axial direction of the pipeline, this position is the position of the blocking portion when the pressure of the condenser is less than the pressure of the exhaust port of the compressor. At this time, the gas discharged from the exhaust port of the compressor is discharged to the condenser through the pipeline and the valve assembly, and pushes the blocking portion to rotate until the plate surface direction is parallel to the axial direction of the pipeline.

[0014] In some embodiments, there are two blocking parts, the shaft body has a central axis, and the two blocking parts are axially symmetrically arranged relative to the central axis of the shaft body.

[0015] In some embodiments, the valve assembly also includes an elastic structure, which is sleeved on the shaft. When the pressure of the condenser is lower than the pressure of the exhaust port of the compressor, the elastic structure is in a natural state, and the blocking portion is pushed to a first position by the elastic force of the elastic structure. When the blocking portion is in the first position, a preset distance is provided between the blocking portion and the end face of the pipeline along the axial direction of the pipeline, and the preset distance is greater than 0.

[0016] In some embodiments, when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking portion is pushed by the pressure on the condenser side to close the channel of the pipeline, and the elastic structure is in a compressed state.

[0017] In some embodiments, the valve assembly further includes a fixing portion, which is fixedly disposed in the pipeline, and a through hole is opened on the fixing portion along the axial direction of the pipeline, and at least a portion of the shaft body can pass through the through hole and enable the shaft body to move along the axial direction.

[0018] In some embodiments, a stopper is provided on the outer periphery of the shaft body at a position connected to or adjacent to the blocking portion, one end of the elastic structure can be connected to the stopper, and the other end of the elastic structure can be connected to the fixing portion.

[0019] In some embodiments, the shaft body includes a first shaft segment and a second shaft segment distributed along its axial direction, the diameter of the first shaft segment is smaller than that of the second shaft segment, and the first shaft segment can be used to be inserted into the through hole, the diameter of the second shaft segment is larger than the aperture of the through hole, and a step is formed at the connection position between the first shaft segment and the second shaft segment, and the step can form an axial limit stop at the through hole.

[0020] In some embodiments, a protruding portion is provided on the fixing portion, located on the periphery of the through hole and protruding toward the direction of the shaft body. The protruding portion is an annular sleeve structure that allows the second shaft segment of the shaft body to be inserted into the interior of the protruding portion.

[0021] The present disclosure further provides an air conditioner, comprising the valve-pipe assembly as described in any of the preceding items, and further comprising a compressor, wherein the valve-pipe assembly is connected to the exhaust port of the compressor.

[0022] In some embodiments, the air conditioner is a centrifugal chiller; and / or, the air conditioner is a magnetically suspended centrifugal chiller.

[0023] The valve pipeline assembly and air conditioner provided by the present disclosure have the following beneficial effects:

[0024] 1. The present invention arranges the valve assembly in the pipeline, and the shaft body in the valve assembly is relatively arranged near the compressor exhaust port, and the blocking part is relatively arranged near the condenser side. Compared with the check structure in the prior art (the existing blocking part is near the compressor exhaust and the shaft body is near the condensation side), the reverse assembly is performed, so that the compressor exhaust gas first passes through the shaft body and then passes through the blocking part to be discharged. When the pressure on the condenser side is greater than the pressure on the compressor exhaust port, the pressure on the condenser side will push the blocking part to move and effectively close the channel of the pipeline, forming an effective anti-backflow effect to prevent the gas on the condenser side from flowing back to the compressor side, solving the problem of the rotor hitting the shaft and displacing when the gas flows back into the compressor during the shutdown process of the conventional air conditioner (preferably the magnetic levitation centrifugal unit), and improving the reliability of the rotor of the air conditioner (especially the magnetic levitation centrifugal unit) during the shutdown process;

[0025] 2. The present disclosure also provides a blocking part that can rotate around the rotating shaft component, so that when the pressure on the condensing side is lower than the pressure on the compressor side, the blocking part can be rotated to a position parallel to the pipeline axis, thereby effectively reducing the gas resistance and pressure loss of the exhaust gas from the compressor, effectively eliminating the throttling pressure loss of the original check structure and eliminating the exhaust pressure loss; and when the pressure on the condensing side is higher than the pressure on the compressor side, the blocking part is rotated to a position perpendicular to the pipeline axis, so that it can be combined with the end face of the pipeline to the greatest extent, so as to effectively seal the inside of the pipeline, prevent the gas on the condensing side from flowing back into the pipeline, and further prevent the situation where the rotor hits the shaft and moves due to the gas backflow;

[0026] 3. The present disclosure also increases the length of the spring by setting an elastic structure, based on the structure in which the blocking part and the shaft body are assembled in reverse relative to the prior art, so that when the spring is at a natural length, the blocking part exceeds the preset distance of the pipeline end face, so that in this state, the compressor exhaust is discharged through the gap between the blocking part, the shaft body and the pipeline end face, and there is no need to overcome the elastic force of the original spring to open the check structure for exhaust. This effectively reduces the problem of energy efficiency reduction caused by the pressure loss required for the conventional check valve to bounce off the spring during exhaust, thereby improving the energy efficiency value of the air conditioner (especially the magnetic levitation centrifugal unit). BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a state structure diagram of the valve pipeline assembly of the present disclosure when no refrigerant flows;

[0028] Figure 2 is a state structure diagram of the valve pipeline assembly of the present disclosure when the compressor is exhausted (the blocking part is open);

[0029] Figure 3 It is a state structure diagram of the valve pipeline assembly disclosed in the present invention when the unit closes the refrigerant return;

[0030] Figure 4 It is a structural schematic diagram of a compressor exhaust check valve in the prior art.

[0031] The reference numerals are as follows:

[0032] 1. Pipeline; 100. Valve assembly; 2. Shaft; 21. First shaft section; 22. Second shaft section; 3. Blocking portion (i.e. baffle); 4. Rotating shaft component; 5. Elastic structure; 6. Fixed portion; 7. Stopper; 8. Extending portion. DETAILED DESCRIPTION

[0033] like Figure 1-3 As shown, the present disclosure provides a valve pipeline assembly, which includes:

[0034] A pipeline 1 and a valve assembly 100, wherein the valve assembly 100 is arranged in the pipeline 1, and the valve assembly 100 includes a shaft body 2 and a blocking portion 3, wherein the blocking portion 3 is arranged on the shaft body 2, and the shaft body 2 is arranged close to the exhaust port of the compressor relative to the blocking portion 3, and the blocking portion 3 is arranged close to the condenser relative to the shaft body 2, and when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking portion 3 is pushed to close the channel of the pipeline 1.

[0035] The present invention arranges a valve assembly in the pipeline, and the shaft body in the valve assembly is relatively arranged near the compressor exhaust port, and the blocking part is relatively arranged near the condenser side. Compared with the check structure in the prior art (the prior art has the blocking part near the compressor exhaust port and the shaft body near the condensation side), the reverse assembly is performed, so that the compressor exhaust gas first passes through the shaft body and then passes through the blocking part to be discharged. When the pressure on the condenser side is greater than the pressure on the compressor exhaust port, the pressure on the condenser side will push the blocking part to move and effectively close the channel of the pipeline, thereby forming an effective anti-backflow effect to prevent the gas on the condenser side from flowing back to the compressor side, solving the problem of the rotor hitting the shaft and displacing when the gas flows back into the compressor during the shutdown process of the conventional air conditioner (preferably the magnetic levitation centrifugal unit), and improving the reliability of the rotor of the air conditioner (especially the magnetic levitation centrifugal unit) during the shutdown process.

[0036] In some embodiments, the shaft 2 can move along the axial direction of the pipeline 1. When the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the shaft 2 and the blocking portion 3 are pushed along the axial direction of the pipeline 1 and move toward the exhaust port of the compressor. At the same time, the blocking portion 3 can also be pushed to rotate, thereby closing the channel of the pipeline 1. This is a further structural form of the shaft and the blocking portion of the present disclosure. By moving along the axial direction of the pipeline, the right end face of the pipeline can be effectively blocked, thereby effectively preventing gas backflow, and the blocking portion can effectively achieve the effect of blocking the end face of the pipeline by rotating.

[0037] In some embodiments, a rotating shaft component 4 (preferably a hinge shaft) is provided at the position where the blocking portion 3 is connected to the shaft body 2, so that the blocking portion 3 can rotate around the rotating shaft component 4. The blocking portion of the present disclosure preferably rotates around the rotating component to achieve the purpose and effect of closing the end face of the pipeline.

[0038] In some embodiments, when the blocking portion 3 rotates around the rotating shaft component 4 toward the direction of the shaft body 2, there is a limit stop position. When the blocking portion 3 rotates to the limit stop position, the blocking portion 3 is restricted from rotating in the direction of the shaft body 2. By setting a limit stop position that moves in the direction of the shaft body on the blocking portion, it is possible to effectively prevent the blocking portion from continuing to rotate in the direction of the shaft body when it rotates to this position, and effectively prevent the situation where the pressure on the condensation side is greater than the pressure on the compressor side and the blocking portion rotates beyond the limit position to cause gas leakage into the compressor, so that the blocking portion (baffle) forms a sealing connection with the end face of the pipeline in a direction perpendicular to the axial direction of the pipeline, thereby effectively preventing the gas on the condenser side from flowing back into the compressor when the centrifugal unit is shut down, causing the rotor to hit the shaft.

[0039] In some embodiments, the blocking portion 3 is a straight plate structure, and the limit stop position is a position where the plate surface direction of the blocking portion 3 is perpendicular to the axial direction of the pipeline 1. This position is the position of the blocking portion 3 when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor. At this time, the gas refluxed from the condenser reaches the blocking portion 3 and is blocked and does not flow back to the exhaust port of the compressor. This is the preferred structural form of the blocking portion disclosed in the present invention, and its limit stop position is a position where the plate surface direction is perpendicular to the pipeline axis. When the straight plate structure is in this position, it can form a sealed connection with the end face of the pipeline to prevent the reflux of gas on the condensation side.

[0040] In some embodiments, the blocking portion 3 is a straight plate structure, and when the blocking portion 3 can also rotate around the rotating shaft component 4 in the direction opposite to the shaft body 2 to a position where the plate surface direction of the blocking portion 3 is parallel to the axial direction of the pipeline 1, this position is the position of the blocking portion 3 when the pressure of the condenser is less than the pressure of the exhaust port of the compressor. At this time, the gas discharged from the exhaust port of the compressor is discharged to the condenser through the pipeline 1 and the valve assembly 100, and pushes the blocking portion 3 to rotate until its plate surface direction is parallel to the axial direction of the pipeline 1. This is the preferred structural form of the blocking part of the present disclosure. The present disclosure also arranges the blocking part to be rotatable around the rotating shaft component, so that when the pressure on the condensation side is lower than the pressure on the compressor side, the blocking part can be rotated to a position parallel to the pipeline axis, thereby effectively reducing the gas resistance and pressure loss exhausted from the compressor, effectively eliminating the throttling pressure loss of the original check structure and eliminating the exhaust pressure loss; and when the pressure on the condensation side is higher than the pressure on the compressor side, the blocking part is rotated to a position perpendicular to the pipeline axis, so that it can be combined with the end face of the pipeline to the greatest extent, so as to effectively seal the inside of the pipeline, prevent the gas on the condensation side from flowing back into the pipeline, and further prevent the gas reflux from causing the rotor to hit the shaft and displace.

[0041] In some embodiments, there are two blocking parts 3, the shaft body 2 has a central axis, and the two blocking parts 3 are arranged axially symmetrically with respect to the central axis of the shaft body 2. This is a further preferred structural form of the blocking part of the present disclosure, and the two blocking parts can be spliced ​​into a full circle structure by two blocking parts, which can effectively match and connect with the circular notch of the end face of the pipeline, thereby blocking the end face of the pipeline, improving the sealing effect, and preventing backflow.

[0042] In some embodiments, the valve assembly 100 further includes an elastic structure 5 (preferably a spring), which is sleeved on the shaft body 2. When the pressure of the condenser is less than the pressure of the exhaust port of the compressor, the elastic structure 5 is in a natural state, and the blocking portion 3 is pushed to the first position by the elastic force of the elastic structure 5. When the blocking portion 3 is in the first position, along the axial direction of the pipeline 1, the blocking portion 3 is spaced from the end face of the pipeline 1 by a preset distance, and the preset distance is greater than 0. The blocking portion does not block the airflow in the pipeline.

[0043] The improvements disclosed in this disclosure are:

[0044] 1. Modify the conventional check valve by first assembling it in reverse and increasing the length of the spring. Change the normally closed baffle to a normally open baffle. That is, the baffle that originally required exhaust pressure to open is changed to normally open when not under stress, eliminating the pressure loss when it is opened. When shutting down, it is closed by the reflux pressure to prevent the condenser reflux gas from impacting the rotor.

[0045] 2. A foldable baffle (rotating) is used at the baffle. When there is no exhaust airflow, the baffle is vertical. When exhaust begins, the upper and lower parts of the baffle open horizontally to eliminate the throttling pressure loss of the original check structure.

[0046] The present disclosure also increases the length of the spring by setting an elastic structure, based on the structure in which the blocking part and the shaft body are assembled in reverse relative to the prior art, so that when the spring is at a natural length, the blocking part exceeds the preset distance of the pipeline end face, so that in this state the compressor exhaust is discharged through the gap between the blocking part, the shaft body and the pipeline end face, and there is no need to overcome the elastic force of the original spring to open the check structure for exhaust. This effectively reduces the problem of energy efficiency reduction caused by the pressure loss required for the conventional check valve to bounce open the spring during exhaust, thereby improving the energy efficiency value of the air conditioner (especially the magnetic levitation centrifugal unit).

[0047] In some embodiments, when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking portion 3 is pushed by the pressure on the condenser side to close the channel of the pipeline 1, and the elastic structure 5 is in a compressed state. This is the preferred structural form of the valve assembly disclosed in the present invention. When the pressure on the condensation side is greater than the pressure on the compressor exhaust side, the blocking portion is driven by the pressure on the condensation side to move the shaft body, and the end face of the pipeline is blocked by the blocking portion, and the shaft body is pushed to compress the elastic structure to form a compressed elastic force. When the compressor exhaust pressure is greater than the condensation side pressure, the compressed elastic force pushes the shaft body outward, pushing the blocking portion to move to the outside of the end face of the pipeline, so that the air outlet channel is larger and smoother, reducing the exhaust elastic resistance loss and pressure loss.

[0048] In some embodiments, the valve assembly 100 further includes a fixing portion 6, the fixing portion 6 is fixedly disposed in the pipeline 1, and a through hole is provided on the fixing portion 6 along the axial direction of the pipeline 1, and at least a portion of the shaft body 2 can be inserted into the through hole, and the shaft body 2 can move along the axial direction. The present disclosure can also effectively fix the shaft body to the pipeline through the setting of the fixing portion, and at least a portion of the shaft body is inserted along the through hole, so that a space for the movement of the shaft body structure can be formed while fixing the shaft body.

[0049] In some embodiments, a stopper 7 is provided on the outer periphery of the shaft body 2 and at a position connected to or adjacent to the blocking portion 3, one end of the elastic structure 5 can be connected to the stopper 7, and the other end of the elastic structure 5 can be connected to the fixing portion 6. The present disclosure provides a structure of the stopper and the fixing portion so that the elastic structure is disposed between the stopper and the fixing portion, and when the shaft body moves toward the fixing portion, the fixing portion can compress the spring to generate an elastic thrust, pushing the spring to extend toward the blocking portion.

[0050] In some embodiments, the shaft body 2 includes a first shaft segment 21 and a second shaft segment 22 distributed along the axial direction thereof, the diameter of the first shaft segment 21 is smaller than that of the second shaft segment 22, and the first shaft segment 21 can be used to be inserted into the through hole, the diameter of the second shaft segment 22 is larger than the aperture of the through hole, and a step is formed at the junction of the first shaft segment 21 and the second shaft segment 22, and the step can form an axial limit stop at the through hole. This is a further preferred structural form of the shaft body disclosed in the present invention, which can form two-section shaft segments with different structures, the first shaft segment is a small diameter segment, which can be effectively inserted into the through hole to form a fit, and the second shaft segment is a large diameter segment, which can be stuck on the surface of the through hole to limit the shaft body.

[0051] In some embodiments, a protruding portion 8 is provided on the fixing portion 6, located at the periphery of the through hole and protruding toward the shaft body 2. The protruding portion 8 is an annular sleeve structure, which can allow the second shaft segment 22 of the shaft body 2 to be inserted into the interior of the protruding portion 8. The present disclosure also uses the protruding portion to accommodate and position the second shaft segment of the shaft body, and inserts the second shaft segment into the annular structure of the protruding portion to form a positioning assembly between the shaft body and the fixing portion.

[0052] The present disclosure further provides an air conditioner, comprising the valve-pipe assembly as described in any of the preceding items, and further comprising a compressor, wherein the valve-pipe assembly is connected to the exhaust port of the compressor.

[0053] In some embodiments, the air conditioner is a centrifugal chiller; and / or, the air conditioner is a magnetically suspended centrifugal chiller.

[0054] The present disclosure is mainly aimed at designing a rotor impact prevention structure inside an exhaust pipe of a current magnetic levitation centrifuge.

[0055] The present invention improves on the original check valve. The working principle of the original check structure is: this check valve is installed in the exhaust pipeline of the compressor. When the compressor is shut down, the original check valve is in a reset state due to the spring force. When the unit is turned on, the compressor performs work to discharge the high-pressure gaseous refrigerant. The high-pressure gaseous refrigerant overcomes the spring force to bounce the check valve open for exhaust. When the unit is shut down, the exhaust volume decreases continuously. The condenser pressure will slowly exceed the exhaust pressure, and the high-pressure gaseous refrigerant will flow back. At this time, the check valve is reset to block the gaseous refrigerant flowing back from the condenser to prevent it from impacting the rotor. During the operation of the original check structure, firstly, it has to overcome the pressure loss caused by the elastic force to perform work, and secondly, it has been throttled through the check valve structure to produce pressure loss.

[0056] The working principle of the present invention is to lengthen the original check valve spring structure and assemble it in reverse, so that when it is not working, the baffle is fully open, that is, there is no need to overcome the elastic force to do work, and at the same time, the baffle is improved. When subjected to a certain pressure, the upper and lower parts of the baffle will open 90 degrees relative to the initial state, reducing the pressure loss caused by throttling. When the exhaust pressure gradually decreases and approaches the condensing pressure during the shutdown process, the upper and lower parts of the baffle first restore the initial state due to the elastic force (similar to an automatic sliding door). When the exhaust pressure is less than the condensing pressure, the condensing pressure will recoil and close the baffle to prevent the reflux refrigerant from impacting the rotor. This structure can eliminate the pressure consumed when the baffle is first opened, and can also eliminate the pressure loss caused by the continuous throttling after the baffle is opened.

[0057] The above is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. The above is only a preferred implementation of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present disclosure, and these improvements and variations should also be regarded as the protection scope of the present disclosure.

Claims

1. A valve pipeline assembly, characterized in that: include: A pipeline (1) and a valve assembly (100), wherein the valve assembly (100) is arranged in the pipeline (1), and the valve assembly (100) comprises a shaft (2) and a blocking portion (3), wherein the blocking portion (3) is arranged on the shaft (2), and the shaft (2) is arranged close to an exhaust port of a compressor relative to the blocking portion (3), and the blocking portion (3) is arranged close to a condenser relative to the shaft (2), and when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking portion (3) is pushed to close the passage of the pipeline (1); The blocking portion (3) is a straight plate structure, and the limit stop position is a position where the plate surface direction of the blocking portion (3) is perpendicular to the axial direction of the pipeline (1). This position is the position of the blocking portion (3) when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor. At this time, the gas flowing back from the condenser is blocked when it reaches the blocking portion (3) and will not flow back to the exhaust port of the compressor. The blocking portion (3) is a straight plate structure. When the blocking portion (3) can rotate around the rotating shaft component (4) in the direction opposite to the shaft body (2) to a position where the plate surface direction of the blocking portion (3) is parallel to the axial direction of the pipeline (1), the position is the position of the blocking portion (3) when the pressure of the condenser is lower than the pressure of the exhaust port of the compressor. At this time, the gas discharged from the exhaust port of the compressor is discharged to the condenser through the pipeline (1) and the valve assembly (100), and pushes the blocking portion (3) to rotate until the plate surface direction is parallel to the axial direction of the pipeline (1); The valve assembly (100) further comprises an elastic structure (5), wherein the elastic structure (5) is sleeved on the shaft body (2); when the pressure of the condenser is lower than the pressure of the exhaust port of the compressor, the elastic structure (5) is in a natural state, and the blocking portion (3) is pushed out to a first position by the elastic force of the elastic structure (5); when the blocking portion (3) is in the first position, a preset distance is provided between the blocking portion (3) and the end surface of the pipeline (1) along the axial direction of the pipeline (1), and the preset distance is greater than 0; When the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the blocking portion (3) is pushed by the pressure on the condenser side to close the channel of the pipeline (1), and the elastic structure (5) is in a compressed state; The valve assembly (100) further comprises a fixing portion (6), the fixing portion (6) being fixedly arranged in the pipeline (1), and a through hole being opened on the fixing portion (6) along the axial direction of the pipeline (1), and at least a part of the shaft body (2) can be inserted into the through hole, so that the shaft body (2) moves along the axial direction; A stopper (7) is provided on the outer periphery of the shaft body (2) and at a position connected to or adjacent to the blocking portion (3); one end of the elastic structure (5) can be connected to the stopper (7), and the other end of the elastic structure (5) can be connected to the fixing portion (6); The shaft body (2) comprises a first shaft segment (21) and a second shaft segment (22) distributed along its axial direction, the diameter of the first shaft segment (21) is smaller than that of the second shaft segment (22), and the first shaft segment (21) can be used to be inserted into the through hole, the diameter of the second shaft segment (22) is larger than the aperture of the through hole, and a step is formed at the connecting position of the first shaft segment (21) and the second shaft segment (22), and the step can form an axial limit stop at the through hole.

2. The valve pipe assembly according to claim 1, characterized in that: The shaft (2) can move along the axial direction of the pipeline (1); when the pressure of the condenser is greater than the pressure of the exhaust port of the compressor, the shaft (2) and the blocking portion (3) are pushed along the axial direction of the pipeline (1) and move toward the exhaust port of the compressor; at the same time, the blocking portion (3) can also be pushed to rotate, thereby closing the channel of the pipeline (1).

3. The valve line assembly according to claim 2, characterized in that: A rotating shaft component (4) is provided at the position where the blocking portion (3) is connected to the shaft body (2), so that the blocking portion (3) can rotate around the rotating shaft component (4).

4. The valve line assembly according to claim 3, characterized in that: When the blocking part (3) rotates around the rotating shaft component (4) in the direction of the shaft body (2), there is a limit stop position. When the blocking part (3) rotates to the limit stop position, the blocking part (3) is restricted from rotating in the direction of the shaft body (2).

5. The valve line assembly according to any one of claims 1 to 4, characterized in that: There are two blocking parts (3), the shaft body (2) has a central axis, and the two blocking parts (3) are arranged in an axisymmetric manner relative to the central axis of the shaft body (2).

6. The valve-line assembly according to claim 1, characterized in that: A protruding portion (8) is provided on the fixing portion (6), located on the outer periphery of the through hole and protruding toward the direction of the shaft body (2); the protruding portion (8) is an annular sleeve-type structure, which can allow the second shaft section (22) of the shaft body (2) to be inserted into the interior of the protruding portion (8).

7. An air conditioner, characterized in that: The invention comprises the valve-pipe assembly according to any one of claims 1 to 6, and further comprises a compressor, wherein the valve-pipe assembly is connected and arranged at the exhaust port of the compressor.

8. The air conditioner according to claim 7, characterized in that: The air conditioner is a centrifugal chiller; and / or the air conditioner is a magnetically suspended centrifugal chiller.

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