Gas buffers, compressors and air conditioners

Abstract

The present invention provides a gas buffer, a compressor and an air conditioner, which relate to the technical field of air conditioning. The gas buffer not only has the function of buffering the high-pressure gas discharged by the reciprocating compressor, but also has the function of preventing backflow. The gas buffer includes a buffer chamber and an elastic buffer structure arranged in the buffer chamber. The gas buffer also includes a blocking structure, a position detection structure and a controller. The position detection structure and the blocking structure are connected to the controller. When the position detection structure detects that the elastic buffer structure moves in the reset direction, the controller can control the blocking structure to block the air intake channel. The gas buffer also includes a flow direction detection structure. When the compressor is exhausting, the flow direction detection structure detects the flow direction of the gas. The flow direction detection structure transmits the detected signal to the controller. The controller controls the blocking structure to open the air intake channel to ensure the normal exhaust of the compressor. The present invention is used to improve the safety of the operation of the reciprocating compressor.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a gas buffer, a compressor and an air conditioner. Background Art

[0002] Air conditioning pipelines are an extremely important part of the entire air conditioning system. However, they are also a part of the entire air conditioning system that is prone to problems. The most common problem is pipeline rupture, which causes refrigerant leakage, resulting in reduced system pressure, affecting the refrigeration effect, and in severe cases, causing compressor failure. In addition to the vibration of the cylinder when the compressor starts, the collision of high-pressure gas and static gas in the pipeline when the compressor starts is also an important factor causing increased pipeline stress.

[0003] Generally, before the compressor is started, the gaseous refrigerant in the pipeline is in a static state. When the compressor is turned on, the high-pressure flowing gas discharged from the compressor will collide with the static gas in the pipeline, causing the pipeline to shake and form stress, which can easily cause pipeline rupture or leakage at the pipeline welding point. In addition, the working process of the reciprocating compressor is suction-compression-exhaust, so the discharged airflow is pulsating. If the airflow pulsates violently, the vibration of the outlet pipeline will increase, the stress will increase, and it will have an adverse effect on the pipeline and auxiliary equipment.

[0004] The invention patent with application number 201720167835.5 discloses a compressor that prevents exhaust pulsation. It buffers high-pressure gas to reduce pipeline stress. In the specific implementation process, the gas is first buffered by spring parts and movable blocks in the first chamber and then returns to flow into the second chamber; however, the article does not disclose a structure to prevent the backflow of high-pressure gas, resulting in the hidden danger of high-pressure gas backflow. Summary of the invention

[0005] The object of the present invention is to provide a gas buffer, a compressor and an air conditioner, so that the gas buffer not only has the function of buffering the high-pressure gas discharged by the reciprocating compressor, but also has the function of preventing backflow. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A gas buffer provided by the present invention includes a buffer cavity and an elastic buffer structure arranged in the buffer cavity. The gas buffer also includes a blocking structure, a position detection structure and a controller. The position detection structure and the blocking structure are connected to the controller. The blocking structure is arranged on an air intake channel connected to the buffer cavity. When the position detection structure detects that the elastic buffer structure moves in a resetting direction, the controller can control the blocking structure to block the air intake channel.

[0008] Furthermore, the elastic buffer structure includes an elastic member and a piston, the piston is connected to the buffer cavity through the elastic member, and the position detection structure can detect the position of the piston on the buffer cavity.

[0009] Furthermore, the buffer air inlet of the buffer chamber faces the piston, the elastic member is arranged on a side of the piston away from the buffer air inlet, and the buffer air outlet of the buffer chamber is arranged on a side of the buffer chamber close to the buffer air inlet.

[0010] Furthermore, the position detection structure is an electromagnetic wave ranging device.

[0011] Furthermore, the gas buffer includes a buffer shell, and the buffer cavity is formed inside the buffer shell; the position detection structure includes a light emitting pulse part, the inner side surface of the right side plate of the buffer shell is connected to the elastic buffer structure, the light emitting pulse part is connected to the elastic buffer structure through a connecting structure passing through the right side plate, and there is a distance between the light emitting pulse part and the right side plate.

[0012] Furthermore, the gas buffer also includes a flow direction detection structure, which is connected to the controller and is arranged on the air intake passage. When the flow direction detection structure detects the exhaust of the compressor, the controller can control the blocking structure to open the air intake passage.

[0013] Furthermore, the gas buffer also includes an air inlet cavity, which is connected to the compressor and the buffer cavity, and the flow direction detection structure and the blocking structure are respectively arranged at the air inlet end and the air outlet end of the air inlet cavity.

[0014] Furthermore, the blocking structure includes a sealing plate and a plate driving device, the plate driving device is drivingly connected to the sealing plate and can drive the sealing plate to open and close the air inlet channel, and the plate driving device is electrically connected to the controller.

[0015] The present invention provides a compressor, comprising the gas buffer.

[0016] The present invention provides an air conditioner, comprising the compressor.

[0017] The present invention provides a gas buffer with the function of reducing pipeline stress. When a reciprocating compressor is exhausting, the gas exhausted by the compressor flows into a buffer chamber through an air intake passage. The high-pressure gas in the buffer chamber impacts an elastic buffer structure, which elastically deforms. The elastic buffer structure buffers the high-pressure gas, thereby protecting the pipeline system, preventing the pipeline from rupture and refrigerant leakage due to excessive stress, and effectively reducing the failure rate of refrigeration equipment. When the compressor finishes exhausting and enters the intake stage, gas reflux is likely to occur. The present invention detects the movement of the elastic buffer structure in the resetting direction through a position detection structure, and determines that the compressor enters the "intake stage", which is a stage where no high-pressure gas enters the buffer chamber. The position detection structure transmits the detection signal to the controller, and the controller controls the blocking structure to block the air intake passage, thereby avoiding reflux.

[0018] The preferred technical solution of the present invention can at least produce the following technical effects:

[0019] The gas buffer also includes a flow direction detection structure. When the compressor is exhausting, the flow direction detection structure detects the flow direction of the gas. The flow direction detection structure transmits the detection signal to the controller. The controller controls the blocking structure to open the air intake channel to ensure normal exhaust of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The figure is a simplified structural diagram of a gas buffer capable of reducing pipeline stress provided by an embodiment of the present invention.

[0022] In the figure, 1-buffer chamber; 2-controller; 3-air inlet channel; 4-elastic member; 5-piston; 6-buffer air inlet; 7-buffer shell; 8-light pulse emitting part; 9-light pulse receiving part; 10-buffer air outlet; 11-flow direction detection structure; 12-air inlet chamber; 13-sealing plate; 14-plate driving device. DETAILED DESCRIPTION

[0023] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0024] The present invention provides a gas buffer with the function of reducing pipeline stress, comprising a buffer chamber 1 and an elastic buffer structure arranged in the buffer chamber 1, the gas buffer further comprising a blocking structure, a position detection structure and a controller 2, the position detection structure and the blocking structure are connected to the controller 2, the blocking structure is arranged on an air inlet passage 3 connected to the buffer chamber 1, when the position detection structure detects that the elastic buffer structure moves in the direction of resetting, the controller 2 can control the blocking structure to block the air inlet passage 3. Figure 1 , schematically shows a buffer chamber 1 and an elastic buffer structure arranged in the buffer chamber 1. When the reciprocating compressor is exhausted, the gas exhausted by the compressor flows into the buffer chamber 1 through the air inlet passage 3. The high-pressure gas in the buffer chamber 1 impacts the elastic buffer structure, and the elastic buffer structure undergoes elastic deformation. The high-pressure gas is buffered by the elastic buffer structure, thereby protecting the pipeline system, preventing the pipeline from rupture due to excessive stress and causing refrigerant leakage, and effectively reducing the failure rate of the refrigeration equipment; when the compressor finishes exhausting and enters the intake stage, gas reflux is likely to occur at this time. The present invention detects the movement of the elastic buffer structure in the resetting direction through the position detection structure, and determines that the compressor enters the "intake stage", which is a stage where the buffer chamber 1 is in a state where no high-pressure gas enters. The position detection structure transmits the detection signal to the controller 2, and the controller 2 controls the blocking structure to block the air inlet passage 3, thereby avoiding the occurrence of refrigeration.

[0025] Regarding the elastic buffer structure, the details are as follows: Figure 1 The elastic buffer structure includes an elastic member 4 and a piston 5. The piston 5 is connected to the buffer chamber 1 through the elastic member 4. The elastic member 4 is preferably a spring. The circumferential side wall of the piston 5 fits with the wall surface of the buffer chamber 1. The position detection structure can detect the position of the piston 5 on the buffer chamber 1. When the reciprocating compressor is exhausting, the gas discharged by the compressor flows into the buffer chamber 1 through the intake passage 3. The high-pressure gas impacts the piston 5, causing the elastic member 4 to be compressed and elastically deformed, thereby playing a buffering role. The position detection structure is used to detect the position of the piston 5. When the piston 5 moves in the reset direction, it is judged that the compressor enters the "intake stage". The position detection structure transmits the detection signal to the controller 2, and the controller 2 controls the blocking structure to block the intake passage 3. For details, see Figure 1The buffer air inlet 6 of the buffer chamber 1 faces the piston 5 , the elastic member 4 is arranged on the side of the piston 5 away from the buffer air inlet 6 , and the buffer air outlet 10 of the buffer chamber 1 is arranged on the side of the buffer chamber 1 close to the buffer air inlet 6 .

[0026] Regarding the position detection structure, the position detection structure is preferably an electromagnetic wave ranging device, that is, the position of the piston 5 on the buffer chamber 1 is detected by using the principle of electromagnetic wave ranging. The specific description is as follows: the gas buffer includes a buffer shell 7, and the buffer chamber 1 is formed inside the buffer shell 7; the position detection structure includes a light pulse emitting unit 8, and the inner side surface of the right side plate of the buffer shell 7 is connected to the elastic buffer structure. The light pulse emitting unit 8 is connected to the elastic buffer structure through the connection structure passing through the right side plate, and there is a distance between the light pulse emitting unit 8 and the right side plate. Of course, the light pulse receiving unit 9 can also be connected to the outer side surface of the right side plate of the buffer shell 7. See Figure 1 , schematically shows the light pulse emitting unit 8 and the light pulse receiving unit 9. The light pulse receiving unit 9 is arranged on the right side of the buffer shell 7. The light pulse emitting unit 8 is connected to the piston 5 and the connection structure between the light pulse emitting unit 8 and the piston 5 passes through the buffer shell 7. The light pulse emitting unit 8 is arranged opposite to the right side of the buffer shell 7, and the light pulse emitting unit 8 moves with the piston 5. When the reciprocating compressor is exhausted, the gas discharged by the compressor flows into the buffer chamber 1 through the intake passage 3. The high-pressure gas in the buffer chamber 1 compresses the piston 5 and the elastic member 4, so that the elastic member 4 is compressed and elastically deformed, and the distance between the light pulse emitting unit 8 and the light pulse receiving unit 9 increases; when the piston 5 moves in the direction of reset, at this time, the distance between the light pulse emitting unit 8 and the light pulse receiving unit 9 begins to decrease, and the position detection structure transmits a signal to the controller. At this time, the controller determines that the compressor is inhaling, and the controller 2 controls the blocking structure to block the intake passage 3. In addition, the position detection structure is not limited to an electromagnetic wave distance measuring device, and can also be other detection structures that can detect the position of the piston 5 except the electromagnetic wave distance measuring device.

[0027] As an optional implementation, the gas buffer further includes a flow direction detection structure 11, which is connected to the controller 2 and is disposed on the air intake passage 3. When the flow direction detection structure 11 detects that the compressor is exhausted, the controller 2 can control the blocking structure to open the air intake passage 3. When the compressor is exhausted, the flow direction detection structure 11 detects the flow direction of the gas, and the flow direction detection structure 11 transmits the detected signal to the controller 2, and the controller 2 controls the blocking structure to open the air intake passage 3. Figure 1 , schematically illustrating the positions of the flow direction detection structure 11 and the blocking structure on the air inlet channel 3. The gas buffer also includes an air inlet cavity 12, which connects the compressor and the buffer cavity 1. The flow direction detection structure 11 and the blocking structure are respectively arranged at the air inlet end and the air outlet end of the air inlet cavity 12. The high-pressure gas coming out of the compressor first enters the air inlet cavity 12 and then enters the buffer cavity 1.

[0028] Regarding the blocking structure, the specific structure is as follows: the blocking structure includes a sealing plate 13 and a plate driving device 14, the plate driving device 14 is transmission-connected to the sealing plate 13 and the plate driving device 14 can drive the sealing plate 13 to open and close the air intake channel 3, the plate driving device 14 is electrically connected to the controller 2, the plate driving device 14 can be a cylinder, and the plate driving device 14 drives the sealing plate 14 to move up and down.

[0029] See also Figure 1 In combination with the structural features of the gas buffer provided by the present invention, the following specifically describes how the gas buffer has the function of preventing backflow on the basis of reducing pipeline stress:

[0030] When the reciprocating compressor is started, the high-pressure gas from the compressor enters the air inlet chamber 12. When entering the air inlet chamber 12, the flow direction detector 11 arranged at the entrance of the air inlet chamber 11 detects that the air flow is flowing to the right. This flow direction signal is transmitted to the controller 2 to determine that the gas buffer is in the air intake stage. The controller 2 controls the drive device 14 to operate, so that the plate drive device 14 drives the sealing plate 13 downward, and the air inlet chamber 12 is connected with the buffer chamber 1; the high-pressure gas discharged from the reciprocating compressor flows into the buffer chamber 1 through the air inlet chamber 12. The high-pressure gas is buffered by the piston 5 and the elastic member 4 in the buffer chamber 1. The piston 5 moves to the right, and the distance between the emitting light pulse part 8 connected to the piston and the receiving light pulse part 9 fixed on the right side of the buffer increases. The signal of the increased distance between each other is transmitted to the controller 2. The controller 2 determines that the buffer is in the gas buffer stage according to the signal, maintains the connection state between the air inlet chamber 12 and the buffer chamber 1, and allows the high-pressure gas to be discharged unimpeded.

[0031] When the compressor finishes exhausting and enters the intake stage, the elastic member 4 in the buffer chamber 1 will rebound, the piston 5 moves to the left, and the distance between the emitting light pulse portion 8 and the receiving light pulse portion 9 will decrease. This is the stage when gas reflux is most likely to occur. Therefore, the controller 2 determines that the buffer chamber 1 is in a stage where no high-pressure gas enters based on the signal that the distance between the emitting light pulse portion 8 and the receiving light pulse portion 9 is reduced. The controller 2 controls the plate driving device 14 to operate, so that the plate driving device 14 drives the sealing plate 13 upward, thereby separating the air intake chamber 12 from the buffer chamber 1, thereby preventing the gas in the buffer chamber 1 from flowing back into the compressor.

[0032] When the compressor is exhausted again, the gas first flows through the flow detector 11 and then enters the air inlet chamber 12. The flow detector 11 transmits the signal that the gas flows from left to right to the controller 2. The controller 2 controls the drive device 14 to operate, so that the plate drive device 14 drives the sealing plate 13 downward, and the air inlet chamber 12 is connected with the buffer chamber 1 to realize periodic control.

[0033] In addition, it should be noted that in order to prevent the flow direction detector 11 from detecting that the gas flow direction signal from left to right and the signal that the distance between the emitting light pulse part 8 and the receiving light pulse part 9 is reduced from being transmitted to the controller 2 at the same time, resulting in an uncertain opening and closing state of the sealing plate 13, the gas flow direction signal from left to right should be set to the highest priority level in the internal logic of the controller 2.

[0034] A compressor includes a gas buffer with reduced pipeline stress provided by the present invention. When a reciprocating compressor is exhausted, the gas exhausted by the compressor flows into the buffer chamber 1 through the air inlet passage 3, and the high-pressure gas in the buffer chamber 1 impacts the elastic buffer structure, which is elastically deformed. The elastic buffer structure buffers the high-pressure gas, thereby protecting the pipeline system, preventing the pipeline from rupturing and refrigerant leakage due to excessive stress, and effectively reducing the failure rate of refrigeration equipment; when the compressor finishes exhausting and enters the air intake stage, gas reflux is likely to occur at this time. The present invention detects that the elastic buffer structure moves in the resetting direction through a position detection structure, and judges that the compressor enters the "air intake stage", which is a stage where the buffer chamber 1 is in a state where no high-pressure gas enters. The position detection structure transmits the detection signal to the controller 2, and the controller 2 controls the blocking structure to block the air inlet passage 3, thereby avoiding the occurrence of reflux.

[0035] The gas buffer also includes a flow direction detection structure 11, which is connected to the controller 2 and is arranged on the air intake passage 3. When the flow direction detection structure 11 detects that the compressor is exhausted, the controller 2 can control the blocking structure to open the air intake passage 3. When the compressor is exhausted, the flow direction detection structure 11 detects the flow direction of the gas, and the flow direction detection structure 11 transmits the detection signal to the controller 2. The controller 2 controls the blocking structure to open the air intake passage 3.

[0036] An air conditioner comprises the compressor provided by the present invention. A gas buffer for reducing pipeline stress is arranged on the exhaust side of the compressor.

[0037] A method for controlling gas reflux using a gas buffer with the function of reducing pipeline stress includes the following contents: a position detection structure detects the position of an elastic buffer structure in real time; when the compressor inhales and the position detection structure detects that the elastic buffer structure moves in the direction of resetting, the controller 2 controls the blocking structure to block the air intake passage 3. When the compressor finishes exhausting and enters the air intake stage, gas reflux is likely to occur at this time. The present invention detects that the elastic buffer structure moves in the direction of resetting through the position detection structure, and judges that the compressor enters the "air intake stage", which is a stage where the buffer chamber 1 is in a state where no high-pressure gas enters. The position detection structure transmits the detection signal to the controller 2, and the controller 2 controls the blocking structure to block the air intake passage 3, thereby avoiding the occurrence of reflux.

[0038] The gas buffer also includes a flow direction detection structure 11, which is connected to the controller 2 and is arranged on the air intake passage 3; the flow direction detection structure 11 detects the gas flow direction of the air intake passage 3 in real time, and when the flow direction detection structure 11 detects that the compressor is exhausted, the controller 2 controls the blocking structure to open the air intake passage 3. Figure 1 When the compressor is exhausting, the gas passes through the flow direction detection structure 11. The flow direction detector 11 transmits the signal that the gas flows from left to right to the controller 2. The controller 2 controls the drive device 14 to operate, so that the plate drive device 14 drives the sealing plate 13 downward, and the gas in the air intake channel 3 enters the buffer chamber 1. The gas in the buffer chamber 1 compresses the elastic buffer structure to achieve gas buffering.

[0039] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A gas buffer, comprising a buffer chamber (1) and an elastic buffer structure arranged in the buffer chamber (1), characterized in that: The gas buffer further comprises a blocking structure, a position detection structure and a controller (2); the position detection structure and the blocking structure are connected to the controller (2); the blocking structure is arranged on an air inlet passage (3) connected to the buffer chamber (1); when the position detection structure detects that the elastic buffer structure moves in a resetting direction, the controller (2) can control the blocking structure to block the air inlet passage (3); The gas buffer further comprises a flow direction detection structure (11), the flow direction detection structure (11) being connected to the controller (2), the flow direction detection structure (11) being arranged on the air intake passage (3), and when the flow direction detection structure (11) detects the exhaust of the compressor, the controller (2) can control the blocking structure to open the air intake passage (3); When the gas flow direction signal detected by the flow direction detection structure (11) from left to right and the signal of distance reduction detected by the position detection structure are simultaneously transmitted to the controller (2), the gas flow direction signal from left to right is set as the highest priority level in the internal logic of the controller (2).

2. The gas buffer according to claim 1, characterized in that The elastic buffer structure comprises an elastic member (4) and a piston (5); the piston (5) is connected to the buffer cavity (1) via the elastic member (4); and the position detection structure can detect the position of the piston (5) on the buffer cavity (1).

3. The gas buffer according to claim 2, characterized in that The buffer air inlet (6) of the buffer chamber (1) is directly opposite to the piston (5), the elastic member (4) is arranged on a side of the piston (5) away from the buffer air inlet (6), and the buffer air outlet (10) of the buffer chamber (1) is arranged on a side of the buffer chamber (1) close to the buffer air inlet (6).

4. The gas buffer according to claim 1, characterized in that The position detection structure is an electromagnetic wave distance measuring device.

5. The gas buffer according to claim 4, characterized in that The gas buffer comprises a buffer shell (7), the interior of the buffer shell (7) forming the buffer cavity (1); the position detection structure comprises a light pulse emitting unit (8), the inner side surface of the right side plate of the buffer shell (7) is connected to the elastic buffer structure, the light pulse emitting unit (8) is connected to the elastic buffer structure via a connection structure passing through the right side plate, and there is a distance between the light pulse emitting unit (8) and the right side plate.

6. The gas buffer according to claim 1, characterized in that The gas buffer further comprises an air intake cavity (12), the air intake cavity (12) being in communication with the compressor and the buffer cavity (1), the flow direction detection structure (11) and the blocking structure being respectively arranged at an air intake end and an air outlet end of the air intake cavity (12).

7. The gas buffer according to any one of claims 1 to 5, characterized in that: The blocking structure comprises a sealing plate (13) and a plate driving device (14); the plate driving device (14) is drivingly connected to the sealing plate (13) and can drive the sealing plate (13) to open and close the air inlet passage (3); and the plate driving device (14) is electrically connected to the controller (2).

8. A compressor, characterized in that: A gas buffer comprising the gas buffer according to any one of claims 1 to 7.

9. An air conditioner, characterized in that: Comprising the compressor as claimed in claim 8.

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