CN111734617A - Compressor and compressor flow protection device and method thereof - Google Patents

Compressor and compressor flow protection device and method thereof Download PDF

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Publication number
CN111734617A
CN111734617A CN202010733056.3A CN202010733056A CN111734617A CN 111734617 A CN111734617 A CN 111734617A CN 202010733056 A CN202010733056 A CN 202010733056A CN 111734617 A CN111734617 A CN 111734617A
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China
Prior art keywords
flow
compressor
pipeline
valve
magnetic induction
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CN202010733056.3A
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Chinese (zh)
Inventor
陶宏
吴生礼
张婷
程英男
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Shanghai Highly New Energy Technology Co Ltd
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Shanghai Highly New Energy Technology Co Ltd
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Priority to CN202010733056.3A priority Critical patent/CN111734617A/en
Publication of CN111734617A publication Critical patent/CN111734617A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/10—Other safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B51/00—Testing machines, pumps, or pumping installations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Check Valves (AREA)

Abstract

The invention provides a compressor and a compressor flow protection device and method thereof, wherein the compressor flow protection device comprises: a flow line for performing suction or discharge of the compressor; the one-way valve is arranged in the flow pipeline and comprises a magnetic valve core; and the magnetic induction sensor is fixed on the outer wall of the flow pipeline, is used for sensing the relative position of the valve core and the magnetic induction sensor, and is used for fixing the outer wall of the flow pipeline of the magnetic induction sensor, which is made of a non-magnetic metal material. The compressor and the compressor flow protection device and method thereof provided by the invention can realize the flow protection of the compressor so as to carry out protection control when the flow of the system refrigerant is less than a limit value.

Description

Compressor and compressor flow protection device and method thereof
Technical Field
The invention relates to the field of compressors, in particular to a compressor and a compressor flow protection device and method thereof.
Background
At present, a refrigeration system adopts a low-voltage switch protection device to protect the refrigeration system when refrigerant leaks (lacks refrigerant) or is exhausted. However, the protection of the refrigeration system by using the low-voltage switch has the following problems: 1) the installation of the low-voltage switch requires a pressure guide hole to be arranged on a compressor or a circulating pipeline, so that the sealing performance of the compressor or a system is poor; 2) the low-voltage switch has lower identification sensitivity; 3) the low-pressure switch is large in size (the lower the detection pressure is, the larger the diaphragm is), and the miniaturization of the compressor is influenced.
Further, the flow rate is too small for the failure reasons such as the unclosed compression cavity, the transmission failure, the refrigerant leakage or the evacuation, and the like, but the system pressure is the equilibrium pressure at the moment, and the low-voltage switch cannot recognize the situation, so that the existing low-voltage protection system cannot respond to and control the faults.
Therefore, how to realize the flow protection of the compressor so as to perform protection control when the flow of the system refrigerant is less than the limit value is a technical problem to be solved in the field.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a compressor and a compressor flow protection device and method thereof, so as to realize the flow protection of the compressor.
The invention provides a flow protection device of a compressor, which comprises:
a flow line for performing suction or discharge of the compressor;
the one-way valve is arranged in the flow pipeline and comprises a magnetic valve core; and
and the magnetic induction sensor is fixed on the outer wall of the flow pipeline and used for sensing the relative position of the valve core and the magnetic induction sensor, and the outer wall of the flow pipeline for fixing the magnetic induction sensor is made of a non-magnetic metal material.
In some embodiments of the present invention, one end of the flow pipeline is connected to a compressor, and the check valve is disposed on a side of the flow pipeline close to the compressor or a side of the flow pipeline far from the compressor.
In some embodiments of the invention, the one-way valve is a float-type one-way valve disposed within the hollow cavity of the flow line.
In some embodiments of the invention, the float-type check valve comprises:
the first valve seat is fixed on the inner wall of the flow pipeline and provided with a first limiting piece;
the first limiting piece limits the conical surface part of the first valve core to block the flow in the flow pipeline;
the second limiting part is positioned on one side of the first valve core along the flow direction in the flow pipeline so as to block the first valve core from moving along the flow direction in the flow pipeline.
In some embodiments of the invention, the check valve is a piston check valve connected between two sections of the flow line.
In some embodiments of the invention, the piston check valve comprises:
the valve body comprises a first extension pipeline and a second extension pipeline which extend along opposite directions, a third limiting part is formed at the joint of the first extension pipeline and the second extension pipeline, and the first extension pipeline is connected to the inner wall or the outer wall of one of the two sections of flow pipelines;
a second spool movably positioned within the second extension conduit, the third stop defining a first end of the second spool to block flow in the flow conduit;
the joint comprises a third end and a fourth end, the third end of the joint is connected to the inner wall or the outer wall of the other section of the two sections of the flow pipelines, the fourth end of the joint is provided with a slide way for the second end of the second valve core to slide, the slide way is provided with a bottom wall, and the bottom wall blocks the second valve core from moving along the flow direction in the flow pipelines;
and the elastic element is sleeved on the outer wall of the slideway so as to provide elastic support for the second valve core.
In some embodiments of the present invention, the magnetic induction sensor is one of a reed switch sensor, a switch type hall sensor, and a linear type hall sensor.
According to another aspect of the present invention, there is also provided a compressor comprising the compressor flow protection device as described above, the compressor flow protection device being disposed at a discharge pipe or a suction pipe of the compressor.
According to another aspect of the present invention, there is also provided a compressor flow protection method applied to the compressor as described above, the compressor flow protection method including:
acquiring a feedback signal of the magnetic induction sensor, and indicating the one-way valve to be closed if the feedback signal of the magnetic induction sensor indicates that the flow in the flow pipeline is less than or equal to a first flow threshold value;
acquiring a feedback signal of the magnetic induction sensor, and indicating that the check valve is opened if the feedback signal of the magnetic induction sensor indicates that the flow in the flow pipeline is greater than a second flow threshold value;
the first flow threshold is less than a second flow threshold.
In some embodiments of the invention, the first flow threshold and the second flow threshold are obtained from a calibration of an equivalent low pressure protection system.
Compared with the prior art, the invention has the following advantages:
integrating a one-way valve and a magnetic induction sensor to sense the relative position of the valve core and the magnetic induction sensor through the magnetic induction sensor so as to determine the flow in the flow pipeline, so that the flow protection control can be performed through the sensed flow; the anti-reverse protection function in the flow pipeline can be realized through the one-way valve; the low-voltage switch is replaced by the matching of the one-way valve and the magnetic induction sensor, so that the difficulty in installing the system pipeline is reduced, and the sealing property is improved; compared with the low-voltage switch, the magnetic induction sensor is adopted, so that the induction sensitivity can be improved.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 shows a schematic diagram of a compressor flow protection arrangement according to an embodiment of the present invention.
Fig. 2 shows a schematic view of a one-way valve according to a first embodiment of the invention.
Fig. 3 shows a schematic view of a one-way valve according to a second embodiment of the invention.
Fig. 4 shows a schematic view of a one-way valve according to a third embodiment of the invention.
Fig. 5 shows a schematic view of a one-way valve according to a fourth embodiment of the invention.
Fig. 6 shows a schematic view of a one-way valve according to a fifth embodiment of the invention.
Fig. 7 to 10 are schematic views illustrating various installation positions of a flow protection device of a compressor on the compressor according to various embodiments of the present invention.
Fig. 11 shows a signal versus flow diagram of a magnetic induction sensor according to a sixth embodiment of the invention.
Fig. 12 shows a signal versus flow diagram of a magnetic induction sensor according to a seventh embodiment of the invention.
Fig. 13 shows a flow chart of a compressor flow protection method according to an embodiment of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.
In order to ameliorate the disadvantages of the prior art, the present invention provides a compressor flow protection device. The compressor flow protection device provided by the invention is described in conjunction with fig. 1. FIG. 1 shows a schematic diagram of a compressor flow protection arrangement according to an embodiment of the present invention.
The compressor flow protection device 1 comprises a flow line 10, a non-return valve 20 and a magnetic induction sensor 30. The flow line 10 is used for suction or discharge of the compressor. A non-return valve 20 is arranged in the flow line 10. The check valve 20 includes a magnetic spool. The magnetic induction sensor 30 is fixed on the outer wall of the flow pipeline 10, and is configured to sense a relative position between the valve core and the magnetic induction sensor 30, and the outer wall of the flow pipeline 10, which is used to fix the magnetic induction sensor 30, is made of a non-magnetic metal material. Thus, the magnetic valve element of the check valve 20 can be used to sense the relative position of the valve element by the magnetic induction sensor 30, thereby determining the refrigerant flow rate in the flow line 10. The valve core of the check valve 20 is in contact with the refrigerant, and the magnetic induction sensor 30 is not in contact with the refrigerant, whereby the magnetic induction sensor 30 can be protected. The material of the wall surface of the tube contacted by the magnetic induction sensor 30 should be a non-magnetic metal material (such as copper, aluminum, stainless steel, etc.) to avoid the sensing influence on the magnetic induction sensor 30. The valve core of the one-way valve 20 can adopt a high-temperature sensitive demagnetization type so as to increase the protection function of excessive exhaust temperature.
Specifically, one end of the flow pipeline 10 is connected to a compressor, and the check valve 20 may be disposed on a side of the flow pipeline 10 close to the compressor or a side of the flow pipeline 10 away from the compressor (see fig. 7 to 10, and fig. 7 to 10 show schematic diagrams of different installation positions of the compressor flow protection device on the compressor according to various embodiments of the present invention).
In some embodiments of the present invention, the check valve may be a float-type check valve disposed within the hollow cavity of the flow line 10. The structure of the float type check valve will be described with reference to fig. 2 to 4, respectively.
Referring initially to fig. 2, fig. 2 shows a schematic view of a one-way valve according to a first embodiment of the present invention. The float type check valve 20 includes a first valve seat 201, a first valve body 202, and a second stopper 203. The first valve seat 201 is fixed to the inner wall of the flow line 10. The first valve seat 201 has a first stopper 204. The first valve element 202 is movably located on an inner wall of the flow pipeline 10, and the first limiting member 204 limits a conical portion 205 of the first valve element 202 to block the flow in the flow pipeline 10 (the flow direction is shown by an arrow in fig. 2). The second stopper 203 is located on one side of the first valve element 202 in the flow direction in the flow line 10 to block the movement of the first valve element 202 in the flow direction in the flow line 10. In the present embodiment, the first stoppers 204 are illustrated as stepped portions, so that channels for the refrigerant to move are formed between the stepped portions. When the tapered surface portion 205 of the first valve element 202 contacts the first stopper 204, the passage is closed, so that the refrigerant in the flow line 10 cannot pass through the check valve 20; when the tapered surface portion 205 of the first valve element 202 is away from the first stopper 204, the passage is opened, so that the refrigerant in the flow line 10 can pass through the check valve 20 in the flow direction. The first valve seat 201 forms a slide way for the first valve element 202 to move, and the second limiting member 203 is located in the slide way and opposite to the first limiting member 204. In this embodiment, the second limiting member 203 may be a plate-shaped member to improve the limiting strength.
Referring now to fig. 3, fig. 3 shows a schematic view of a one-way valve according to a second embodiment of the present invention. The float type check valve 21 includes a first valve seat 211, a first valve body 212, and a second stopper 213. The first valve seat 211 is fixed to the inner wall of the flow line 10. The first valve seat 211 has a first stopper 214. The first valve spool 212 is movably located on the inner wall of the flow pipeline 10, and the first stopper 214 defines a tapered surface portion 215 of the first valve spool 212 to block the flow in the flow pipeline 10 (the flow direction is shown by the arrow in fig. 3). The second stopper 213 is located on one side of the first spool 212 in the flow direction in the flow pipe 10 to block the movement of the first spool 212 in the flow direction in the flow pipe 10. In the present embodiment, the first valve seat 211 is a hollow tubular member to form a passage through which the refrigerant moves. The first retaining member 214 is formed by a wall of the first valve seat 211. When the tapered surface portion 215 of the first valve element 212 contacts the first stopper 214, the passage is closed, so that the refrigerant in the flow line 10 cannot pass through the check valve 20; when the tapered surface portion 215 of the first valve element 212 moves away from the first stopper 214, the passage is opened, so that the refrigerant in the flow line 10 can pass through the check valve 20 in the flow direction. A slide way for moving the first valve element 212 is formed between the first valve seat 211 and the second stopper 213. The second position-limiting member 213 is a position-limiting ring for limiting the moving position of the first valve element 212.
Referring now to fig. 4, fig. 4 shows a schematic view of a one-way valve according to a third embodiment of the present invention. Similar to the previous embodiment, the float type check valve 22 includes a first valve seat 221, a first valve spool 222, and a second stopper 223. In the present embodiment, the second stopper 223 forms a slide for the first valve element 222 to move, and is connected to the first valve seat 221.
Fig. 2 to 4 are merely schematic illustrations of the float-type check valve of the present invention, and the present invention is not limited thereto, and other structures of the float-type check valve are also within the scope of the present invention.
In some embodiments of the invention, the one-way valve may be a piston-type one-way valve connected between two sections of the flow line. Reference is now made to fig. 5 and 6, respectively, for a description of the construction of the piston check valve.
Referring first to fig. 5, fig. 5 shows a schematic view of a one-way valve according to a fourth embodiment of the invention. The piston check valve 23 includes a valve body 231, a second spool 232, a joint 233, and an elastic member 235. The valve body 231 includes a first extension pipe 2311 and a second extension pipe 2312 extending in opposite directions. The junction of the first extension pipe 2311 and the second extension pipe 2312 forms a third stop 2313. The first extension line 2312 is connected to the inner or outer wall of one of the two flow lines 11. The second spool 232 is movably positioned within the second extension line 2312. The third stopper 2313 restricts the first end of the second spool 232 to block the flow in the flow line. The joint 233 includes a third end and a fourth end, the third end of the joint 233 is connected to the inner wall or the outer wall of the other of the two flow pipes, and the fourth end of the joint 233 is provided with a slide 2331 for the second end of the second valve element 232 to slide. The slide 2331 has a bottom wall that blocks movement of the second valve spool 232 in the direction of flow in the flow line 11. The elastic element 235 is sleeved on the outer wall of the slide 2331 to provide elastic support for the second valve spool 232. Silver braze 244 may be used to weld between the valve body 231 and the fitting 233.
Referring now to fig. 6, fig. 6 shows a schematic view of a one-way valve according to a fifth embodiment of the invention. The piston type check valve 24 includes a valve body 241, a second valve spool 242, a joint 243, and an elastic member 245. The valve body 241 includes a first extension pipe 2411 and a second extension pipe 2412 extending in opposite directions. A third limiting member 2413 is formed at the joint of the first extension pipeline 2411 and the second extension pipeline 2412. The first extension pipe 2412 is connected to the inner or outer wall of one of the two flow pipes 11. The second spool 242 is movably disposed within the second extension line 2412. The third limiter 2413 limits the first end of the second valve spool 242 to block the flow in the flow line. The joint 243 includes a third end and a fourth end, the third end of the joint 243 is connected to the inner wall or the outer wall of the other of the two flow pipes 12, and the fourth end of the joint 243 is provided with a slide 2431 for sliding the second end of the second valve spool 232. The ramp 2431 has a bottom wall that blocks movement of the second spool 242 in the direction of flow in the flow line 11. The elastic element 245 is sleeved on the outer wall of the slide 2431 to provide elastic support for the second valve spool 242. Silver braze 244 may be used for welding between valve body 241 and fitting 243, between valve body 241 and flow line 11, and between fitting 243 and flow line 12.
In some embodiments of the present invention, the magnetic induction sensor is one of a reed switch sensor, a switch type hall sensor, and a linear type hall sensor. Specifically, the reed switch sensor is a switch type sensor and outputs a digital value. The switch type Hall sensor consists of a voltage stabilizer, a Hall element, a differential amplifier, a Schmitt trigger and an output stage, and outputs digital quantity. The linear Hall sensor is composed of a Hall element, a linear amplifier and an emitter follower, and outputs an analog quantity.
According to another aspect of the present invention, there is also provided a compressor comprising the compressor flow protection device as described above, the compressor flow protection device being disposed at a discharge pipe or a suction pipe of the compressor. Fig. 7 to 10 show a number of different embodiments according to the invention
The compressor flow protection device of the embodiment is a schematic diagram of different installation positions on a compressor. Fig. 7 shows that the compressor flow protection device 1 is arranged on the side of the discharge pipe 3 of the compressor 2 remote from the compressor (refrigeration system discharge pipe). Fig. 8 shows that the compressor flow protection device 1 is arranged on the side of the discharge pipe 3 of the compressor 2 close to the compressor (e.g. the compressor discharge). Fig. 9 shows the compressor flow protection device 1 arranged on the side of the suction pipe 4 of the compressor 2 remote from the compressor (refrigeration system suction pipe). Fig. 10 shows the compressor flow protection device 1 disposed on the side of the suction pipe 4 of the compressor 2 near the compressor (e.g., the compressor suction port). Specifically, in each of the above embodiments, the flow line of the compressor flow protection device 1 may be multiplexed as an exhaust pipe or an intake pipe where it is located. In some variations, the flow line of the compressor flow protection device 1 may also be connected to the end of a discharge or suction pipe. Preferably, the compressor flow protection device 1 is provided at the discharge pipe 3 of the compressor 2 in order to detect and protect the discharge flow.
According to another aspect of the present invention, there is also provided a compressor flow protection method applied to the compressor as described above, and a flowchart of the compressor flow protection method is shown in fig. 13. The compressor flow protection method comprises the following steps:
step S310: acquiring a feedback signal of the magnetic induction sensor, and if the feedback signal of the magnetic induction sensor indicates that the flow in the flow pipeline is reduced to be less than or equal to a first flow threshold value, indicating that the one-way valve is closed;
step S320: and acquiring a feedback signal of the magnetic induction sensor, and indicating that the check valve is opened if the feedback signal of the magnetic induction sensor indicates that the flow in the flow pipeline is increased to be more than or equal to a second flow threshold.
Wherein the first flow threshold is less than a second flow threshold.
Specifically, the above-mentioned compressor flow protection method is described below with reference to two magnetic induction sensors of fig. 11 and 12, respectively.
Referring first to fig. 11, fig. 11 shows a schematic diagram of the relationship between the signal and the flow rate of a magnetic induction sensor (switch type sensor) according to a sixth embodiment of the present invention.
In the flow protection control of this embodiment, the refrigeration system or compressor is first brought to a minimum flow F min1, when the magnetic induction sensor runs, opening of the one-way valve, magnetic induction intensity and a feedback signal 0 of the magnetic induction sensor are obtained; so that the refrigerating system or compressor is at a minimum flow F min2, when the magnetic induction sensor works, the opening degree of the one-way valve, the magnetic induction intensity and a feedback signal 1 of the magnetic induction sensor. When the flow value is more than or equal to F min2, the magnetic induction sensor outputs a feedback signal 1, and when the flow value is reduced to FminBelow 2, the feedback signal of the sensor is not changed until it is reduced to less than or equal to FminAt 1, the magnetic induction sensor feedback signal jumps to 0 to indicate that the check valve is closed. When the flow value is less than or equal to F min1, the magnetic induction sensor outputs a feedback signal of 0, and when the flow rate is increased to F min1 or above, the feedback signal of the magnetic induction sensor is unchanged and is increased to be more than or equal to FminAt 2, the sensor feedback signal jumps to 1 to indicate that the check valve is open. Specifically, in this embodiment, F may be definedmin2 is a flow limit value with an operating point command of 'on', corresponding to the sensor feedback signal 1; f min1 is the flow limit with the operating point command off, corresponding to sensor feedback signal 0.
Fig. 12 shows a schematic diagram of the relationship between the signal and the flow rate of a magnetic induction sensor (linear type sensor) according to a seventh embodiment of the present invention.
In the flow protection control of this embodiment, the refrigeration system is first caused to operate orCompressor is in the range of 0-FmaxWhen the flow interval runs, the opening of the one-way valve, the magnetic induction intensity and a feedback signal of the magnetic induction sensor are 0-100%; so that it is determined that the refrigeration system or compressor is at F1～F2When the flow interval runs, the opening of the one-way valve, the magnetic induction intensity and the feedback signal X of the magnetic induction sensor1％～X2% of the total weight of the composition. Thus, F can be defined2Is the flow limit value with the working point command of 'on', corresponding to the feedback signal X of the sensor2％；F1Is the flow limit value with the operating point command of 'off', corresponding to the sensor feedback signal X1% of the total weight of the composition. When the flow rate value is from F1Increase to F2When the flow exceeds F, the command of 'off' is executed unchanged until the flow exceeds F2The on instruction is executed. When the flow rate value is from F2Down to F1When the flow rate is less than F, the on command is executed unchanged until the flow rate is less than F1And executing the off instruction.
Specifically, the first flow threshold and the second flow threshold are obtained according to calibration of an equivalent low-pressure protection system. For example, the corresponding flow value F when the low-pressure protection executes the "off" command in the low-pressure protection system can be recordedO(ii) a Recording the corresponding flow value F when the low-pressure protection executes the 'on' instruction in the low-pressure protection systemC(ii) a Definition FOIs F min1 or F1Value of (A), FCIs Fmin2 or F2The value of (c).
The foregoing is merely an exemplary description of various implementations of the invention and is not intended to be limiting thereof.
Compared with the prior art, the invention has the following advantages:
integrating a one-way valve and a magnetic induction sensor to sense the relative position of the valve core and the magnetic induction sensor through the magnetic induction sensor so as to determine the flow in the flow pipeline, so that the flow protection control can be performed through the sensed flow; the anti-reverse protection function in the flow pipeline can be realized through the one-way valve; the low-voltage switch is replaced by the matching of the one-way valve and the magnetic induction sensor, so that the difficulty in installing the system pipeline is reduced, and the sealing property is improved; compared with the low-voltage switch, the magnetic induction sensor is adopted, so that the induction sensitivity can be improved.
Exemplary embodiments of the present invention are specifically illustrated and described above. It is to be understood that the invention is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims.

Claims (10)

1. A compressor flow protection device, comprising:
a flow line for performing suction or discharge of the compressor;
the one-way valve is arranged in the flow pipeline and comprises a magnetic valve core; and
and the magnetic induction sensor is fixed on the outer wall of the flow pipeline and used for sensing the relative position of the valve core and the magnetic induction sensor, and the outer wall of the flow pipeline for fixing the magnetic induction sensor is made of a non-magnetic metal material.
2. The compressor flow protection device of claim 1, wherein one end of the flow line is connected to a compressor, and the check valve is disposed on a side of the flow line close to the compressor or a side of the flow line away from the compressor.
3. The compressor housing assembly of claim 2, wherein the check valve is a float-type check valve disposed within the hollow cavity of the flow line.
4. The compressor flow protection device of claim 3, wherein said float-type check valve comprises:
the first valve seat is fixed on the inner wall of the flow pipeline and provided with a first limiting piece;
the first limiting piece limits the conical surface part of the first valve core to block the flow in the flow pipeline;
the second limiting part is positioned on one side of the first valve core along the flow direction in the flow pipeline so as to block the first valve core from moving along the flow direction in the flow pipeline.
5. The compressor flow protection device of claim 2, wherein the check valve is a piston check valve connected between two sections of the flow line.
6. The compressor flow protection device of claim 5, wherein said piston check valve comprises:
the valve body comprises a first extension pipeline and a second extension pipeline which extend along opposite directions, a third limiting part is formed at the joint of the first extension pipeline and the second extension pipeline, and the first extension pipeline is connected to the inner wall or the outer wall of one of the two sections of flow pipelines;
a second spool movably positioned within the second extension conduit, the third stop defining a first end of the second spool to block flow in the flow conduit;
the joint comprises a third end and a fourth end, the third end of the joint is connected to the inner wall or the outer wall of the other section of the two sections of the flow pipelines, the fourth end of the joint is provided with a slide way for the second end of the second valve core to slide, the slide way is provided with a bottom wall, and the bottom wall blocks the second valve core from moving along the flow direction in the flow pipelines;
and the elastic element is sleeved on the outer wall of the slideway so as to provide elastic support for the second valve core.
7. The compressor flow protection device of claim 1, wherein the magnetic induction sensor is one of a reed switch sensor, a switch type hall sensor, and a linear type hall sensor.
8. A compressor comprising a compressor flow protection device according to any one of claims 1 to 7, said compressor flow protection device being provided at a discharge or suction pipe of said compressor.
9. A compressor flow protection method applied to the compressor of claim 8, comprising:
acquiring a feedback signal of the magnetic induction sensor, and if the feedback signal of the magnetic induction sensor indicates that the flow in the flow pipeline is reduced to be less than or equal to a first flow threshold value, indicating that the one-way valve is closed;
acquiring a feedback signal of the magnetic induction sensor, and indicating that the check valve is opened if the feedback signal of the magnetic induction sensor indicates that the flow in the flow pipeline is increased to be more than or equal to a second flow threshold;
wherein the first flow threshold is less than a second flow threshold.
10. The compressor flow protection method of claim 9, wherein the first flow threshold and the second flow threshold are obtained from calibration of an equivalent low pressure protection system.
CN202010733056.3A 2020-07-27 2020-07-27 Compressor and compressor flow protection device and method thereof Pending CN111734617A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202349289U (en) * 2011-09-16 2012-07-25 上海磊诺工业气体有限公司 High-pressure check valve
CN103344059A (en) * 2013-07-04 2013-10-09 天津商业大学 Secondary throttling middle complete cooling variable flow two-stage compression refrigerating system
CN108571604A (en) * 2017-03-10 2018-09-25 浙江三花制冷集团有限公司 A kind of one-way control valve and its manufacturing method
CN208024937U (en) * 2017-11-29 2018-10-30 浙江耀达智能科技股份有限公司 One kind automatically controlling novel flow rate switch
CN111288190A (en) * 2018-12-10 2020-06-16 中国科学院沈阳自动化研究所 Wafer check valve with flow detection function
CN212717120U (en) * 2020-07-27 2021-03-16 上海海立新能源技术有限公司 Compressor and compressor flow protection device thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202349289U (en) * 2011-09-16 2012-07-25 上海磊诺工业气体有限公司 High-pressure check valve
CN103344059A (en) * 2013-07-04 2013-10-09 天津商业大学 Secondary throttling middle complete cooling variable flow two-stage compression refrigerating system
CN108571604A (en) * 2017-03-10 2018-09-25 浙江三花制冷集团有限公司 A kind of one-way control valve and its manufacturing method
CN208024937U (en) * 2017-11-29 2018-10-30 浙江耀达智能科技股份有限公司 One kind automatically controlling novel flow rate switch
CN111288190A (en) * 2018-12-10 2020-06-16 中国科学院沈阳自动化研究所 Wafer check valve with flow detection function
CN212717120U (en) * 2020-07-27 2021-03-16 上海海立新能源技术有限公司 Compressor and compressor flow protection device thereof

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