CN212227449U - Magnetic suspension refrigeration compressor control device - Google Patents
Magnetic suspension refrigeration compressor control device Download PDFInfo
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- CN212227449U CN212227449U CN202020985269.0U CN202020985269U CN212227449U CN 212227449 U CN212227449 U CN 212227449U CN 202020985269 U CN202020985269 U CN 202020985269U CN 212227449 U CN212227449 U CN 212227449U
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Abstract
The utility model provides a magnetic suspension compressor control device, including main control unit, the converter, the magnetic bearing controller, a compressor, the evaporimeter, a condenser, the outlet pipe, the oral siphon, refrigerated water temperature sensor, first body, second body and third body, be equipped with the box on the condenser, install main control unit in the box respectively, converter and magnetic bearing controller, condenser one side is equipped with the oral siphon, evaporimeter one side is equipped with the outlet pipe, install refrigerated water temperature sensor on the outlet pipe, the first side of compressor communicates to the condenser top through first body, the first end of compressor communicates to the evaporimeter top through the second body, the condenser bottom communicates to the evaporimeter top through the third body. A magnetic suspension compressor control device, adopt converter speed control, increase unit operating range, avoid the unit to shorten because of frequently opening the unit life-span that causes, data real-time supervision, the safeguard measure is more perfect.
Description
Technical Field
The utility model belongs to the technical field of compressor control, especially, relate to a magnetic suspension refrigeration compressor controlling means.
Background
At present, a screw compressor is mainly used as power of a refrigerating unit in the market, a single-machine operation mode is mostly adopted, a control system of the mode is simple, the manufacturing cost is low, unit protection measures are not comprehensive, the control system only adopts a relay and contactor circuit or a soft starter mode, the unit can only adjust refrigerating capacity through loading and unloading, the control temperature precision is insufficient, the service life of an electrical element and the service life of the compressor are influenced through long-term operation, the frequency conversion speed regulation control is needed to be provided, the unit operation range is enlarged, a control device of the unit control precision is improved, the unit service life shortening caused by frequent starting and stopping of the unit is avoided, the unit operation data are monitored in real time, and the unit protection measures are more perfect.
Disclosure of Invention
In view of this, the utility model aims at providing a magnetic suspension compressor control device to solve control system and only adopt relay and contactor circuit or soft starter mode, the unit can only adjust the refrigerating output through the loading uninstallation, leads to the controlled temperature precision not enough, and long-term operation influences the problem in electric elements and compressor life-span.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a magnetic suspension refrigeration compressor control device comprises a main controller, a frequency converter, a magnetic bearing controller and a chilled water temperature sensor, first body, second body and heat transfer device, be equipped with the box on the condenser, install main control unit in the box respectively, converter and magnetic bearing controller, condenser one side is equipped with the oral siphon, evaporimeter one side is equipped with the outlet pipe, the interior installation refrigerated water temperature sensor of outlet pipe, the first side of compressor communicates to the condenser top through first body, the first end of compressor communicates to the evaporimeter top through the second body, the condenser bottom communicates to the evaporimeter top through heat transfer device, the compressor signal is connected to the controller and the magnetic bearing controller of converter respectively, the controller of converter, the equal signal connection of magnetic bearing controller and refrigerated water temperature sensor to main control unit, main control unit external circuit.
Further, the compressor is a magnetically levitated centrifugal compressor.
Further, a magnetic suspension refrigeration compressor controlling means still includes condensing pressure sensor, evaporating pressure sensor, exhaust pressure sensor, temperature sensor and the pressure sensor that admits air, install exhaust pressure sensor in the first body, install temperature sensor and the pressure sensor that admits air respectively in the second body, condenser inner wall top installation condensing pressure sensor, evaporimeter inner wall top installation evaporating pressure sensor, condensing pressure sensor, evaporating pressure sensor, exhaust pressure sensor, the temperature sensor that admits air and the pressure sensor signal connection of admitting air to main control unit.
Furthermore, the heat exchange device comprises a heat exchanger, a fifth pipe body, a seventh pipe body, an economic electronic expansion valve, a main electronic expansion valve, a sixth pipe body and an air supply pressure sensor, the bottom of the condenser is communicated to the upper part of the heat exchanger through the fourth pipe body, the bottom of the condenser is communicated to the lower part of the heat exchanger through the fifth pipe body, the economic electronic expansion valve is installed on the fifth pipe body, the bottom of the heat exchanger is communicated to the top of the evaporator through the seventh pipe body, the main electronic expansion valve is installed on the seventh pipe body, the top of the heat exchanger is communicated to the first side of the compressor through the sixth pipe body, the air supply pressure sensor is installed on one side of the inner wall of the sixth pipe body.
Further, the heat exchange device is a third pipe body.
Furthermore, the magnetic suspension refrigeration compressor control device further comprises a bypass pipe and a bypass electromagnetic valve, the bottom of the evaporator is communicated to the first pipe body through the bypass pipe, the bypass electromagnetic valve is installed on the bypass pipe, and the bypass electromagnetic valve is in signal connection with the main controller.
Further, a magnetic suspension compressor control device still includes eighth body, ninth body and motor cooling solenoid valve, and the compressor outer wall is linked together through eighth body and evaporimeter top, and the compressor outer wall is linked together through ninth body and condenser, installs motor cooling solenoid valve on the ninth body, and motor cooling solenoid valve signal connection to main control unit.
Compared with the prior art, a magnetic suspension refrigeration compressor controlling means have following advantage:
(1) a magnetic suspension compressor control device, adopt converter speed governing control, collect the real-time play water temperature of outlet pipe through main control unit, through the rotational speed of converter adjustment magnetic suspension centrifugal compressor, increased unit operating range, improved the controlling means of the control accuracy of unit, avoided the unit to shorten because of frequently opening the unit life-span that stops the cause, unit operation data real-time supervision, the unit safeguard measure is more perfect.
(2) A magnetic suspension compressor control device, be provided with the motor cooling tube, the motor cooling tube gets into the compression cavity through the cooling solenoid valve, through discharging into the evaporimeter behind the cooling compressor, through self-loopa cooling, avoid increasing all the other devices, economy is suitable for.
(3) A magnetic suspension compressor control device that refrigerates, be equipped with the bypass pipeline, from the compressor gas vent through the bypass solenoid valve, be connected to the evaporimeter bottom intercommunication and exhaust, the unit starts and opens when shutting down, prevents that the unit from transshipping.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
fig. 1 is a front view of a magnetic suspension refrigeration compressor control device according to an embodiment of the present invention;
fig. 2 is a rear view of a magnetic suspension refrigeration compressor control device according to an embodiment of the present invention;
fig. 3 is a top view of a magnetic suspension refrigeration compressor control device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a magnetic suspension refrigeration compressor control device according to an embodiment of the present invention;
fig. 5 is a control schematic diagram of a magnetic suspension refrigeration compressor control device according to an embodiment of the present invention.
Description of reference numerals:
1-a main controller; 2-a frequency converter; 3-a magnetic bearing controller; 4-a compressor; 5-an evaporator; 6-a condenser; 7-a water outlet pipe; 8-water inlet pipe; 9-chilled water temperature sensor; 10-a first tube; 11-a second tube; 12-a third tube; 13-an exhaust pressure sensor; 14-an intake air temperature sensor; 15-an intake pressure sensor; 16-a condensing pressure sensor; 17-an evaporation pressure sensor; 18-a heat exchanger; 19-a fifth tube; 20-a seventh tube; 21-an economic electronic expansion valve; 22-main electronic expansion valve; 23-a sixth tube; 24-a gas-supply pressure sensor; 25-bypass solenoid valve; 26-an eighth tube; 27-a ninth tube; 28-motor cooling solenoid valve; 29-a bypass pipe; 30-a fourth tube; 31-evaporator level sensor.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1-4, a magnetic suspension refrigeration compressor control device comprises a main controller 1, a frequency converter 2, a magnetic bearing controller 3, a compressor 4, an evaporator 5, a condenser 6, a water outlet pipe 7, a water inlet pipe 8, a chilled water temperature sensor 9, a first pipe 10, a second pipe 11 and a heat exchange device, wherein the condenser 6 is provided with a box body, the main controller 1, the frequency converter 2 and the magnetic bearing controller 3 are respectively installed in the box body, the type of the frequency converter 2 is a flying EG100, the main controller 1 is a PLC, the type of the main controller 1 is Siemens S7-200smart, the type of the magnetic bearing controller 3 is flying EMC-A, one side of the condenser 6 is provided with the water inlet pipe 8, one side of the evaporator 5 is provided with the water outlet pipe 7, the water outlet pipe 7 is provided with the chilled water temperature sensor 9, the medium temperature of the water outlet pipe 7 is monitored in real time, the type of the chilled water temperature sensor, the first side of a compressor 4 is communicated to the top of a condenser 6 through a first pipe 10, the first end of the compressor 4 is communicated to the top of an evaporator 5 through a second pipe 11, the bottom of the condenser 6 is communicated to the top of the evaporator 5 through a heat exchange device, the compressor 4 is respectively connected to a controller of a frequency converter 2 and a magnetic bearing controller 3 through signals, the controller of the frequency converter 2, the magnetic bearing controller 3 and a freezing water temperature sensor 9 are all connected to a main controller 1 through signals, the main controller 1 sends an instruction to the magnetic bearing controller 3, the magnetic bearing controller 3 controls a magnetic bearing suspension main shaft of the compressor 4, then the magnetic bearing controller 3 feeds back a suspension signal to the main controller 1, the main controller 1 starts the frequency converter 2, the frequency converter 2 controls the rotating speed of the compressor 4, the freezing water temperature sensor 9 monitors the temperature of a liquid medium in a water, through the temperature of refrigerated water temperature sensor 9 monitoring, main control unit 1 transmission signal to converter 2, converter 2 realizes frequency conversion regulatory function according to the rotational speed of signal control compressor 4, main control unit 1 external circuit.
The compressor 4 is a magnetic levitation centrifugal compressor and the compressor 4 is of the flying 150RT type.
The magnetic suspension refrigeration compressor control device further comprises a condensation pressure sensor 16, an evaporation pressure sensor 17, an exhaust pressure sensor 13, an air inlet temperature sensor 14 and an air inlet pressure sensor 15, the exhaust pressure sensor 13 is installed in the first pipe body 10 and used for monitoring exhaust pressure, the air inlet temperature sensor 14 and the air inlet pressure sensor 15 are installed in the second pipe body 11 and used for detecting air inlet temperature and air inlet pressure respectively, the condensation pressure sensor 16 is installed at the top of the condenser 6 and used for detecting pressure in the condenser 6, the evaporation pressure sensor 17 is installed at the top of the evaporator 5 and used for detecting pressure in the evaporator 5, the condensation pressure sensor 16, the evaporation pressure sensor 17, the exhaust pressure sensor 13, the air inlet temperature sensor 14 and the air inlet pressure sensor 15 are connected to the main controller 1 in a signal mode, pressure signals detected by the exhaust pressure sensor 13 and the air inlet pressure sensor 15 are transmitted to the main controller 1, main control unit 1 sends signal to converter 2 according to prefabricated numerical value, 4 rotational speeds of compressor are controlled to converter 2 to this rotational speed of controlling compressor 4 avoids the surge area, condensation pressure sensor 16, evaporation pressure sensor 17 and intake air temperature sensor 14 transmit the data of gathering in real time to main control unit 1, when main control unit 1 judges that the numerical value of arbitrary one of them survey exceeds the threshold value of settlement, main control unit 1 all controls the device auto-stop, prevent that the unit from transshipping, avoid the emergence accident.
The condensing pressure sensor 16, the evaporating pressure sensor 17, the exhaust pressure sensor 13, and the intake pressure sensor 15 are each of a model number of denfoss AKS 3000.
The heat exchange device can be a third pipe body 12, and also can comprise a heat exchanger 18, a fifth pipe body 19, a seventh pipe body 20, an economic electronic expansion valve 21, a main electronic expansion valve 22, an evaporator liquid level sensor 31, a sixth pipe body 23 and an air supply pressure sensor 24, the bottom of the condenser 6 is communicated to the upper part of the heat exchanger 18 through the fourth pipe body 30, the model of the heat exchanger 18 is KH8152, the bottom of the condenser 6 is communicated to the lower part of the heat exchanger 18 through the fifth pipe body 19, the economic electronic expansion valve 21 is installed on the fifth pipe body 19, the bottom of the heat exchanger 18 is communicated to the top of the evaporator 5 through the seventh pipe body 20, the main electronic expansion valve 22 is installed on the seventh pipe body 20, the models of the economic electronic expansion valve 21 and the main electronic expansion valve 22 are both in the Denfoss, an air supply pressure sensor 24 is installed on the sixth pipe body 23, an evaporator liquid level sensor 31 is installed in the evaporator 5, the type of the evaporator liquid level sensor 31 is Danfoss AKS4100U, the type of the air supply pressure sensor 24 is Danfoss AKS3000, the evaporator liquid level sensor 31, the economic electronic expansion valve 21, the main electronic expansion valve 22 and the air supply pressure sensor 24 are all in signal connection with the main controller 1, the air supply pressure sensor 24 is used for detecting the gas pressure in the sixth pipe body 23, if the pressure in the sixth pipe body 23 exceeds a set threshold value, the main controller 1 controls the economic electronic expansion valve 21 to reduce the opening degree, so that the pressure in the heat exchanger 18 is reduced until the normal value is recovered; if the pressure in the sixth pipe body 23 is lower than the set threshold value, the main controller 1 controls the economic electronic expansion valve 21 to increase the opening degree, the pressure in the heat exchanger 18 increases until the normal value is recovered, the evaporator liquid level sensor 31 is used for detecting the liquid level height of the liquid medium in the evaporator 5, then the data is transmitted to the main controller 1, and the main controller 1 controls the opening degree of the main electronic expansion valve 22 according to the set numerical value, so that the liquid level height of the liquid medium in the evaporator 5 is adjusted to reach the set value.
The bottom of an evaporator 5 is communicated to a first pipe body 10 through a bypass pipe 29, the bypass pipe 29 is provided with a bypass electromagnetic valve 25, the bypass electromagnetic valve 25 is connected to a main controller 1 in a signal mode, the main controller 1 controls the bypass electromagnetic valve 25 to be opened when a compressor 4 is started, the main controller 1 controls the bypass electromagnetic valve 25 to be closed after the compressor 4 runs for two minutes, the main controller 1 controls the bypass electromagnetic valve 25 to be opened when the compressor 4 is shut down, and then the main controller 1 controls the bypass electromagnetic valve 25 to be closed in two minutes, so that the part is ventilated to prevent overload of a switch group.
The magnetic suspension refrigeration compressor control device also comprises an eighth pipe 26, a ninth pipe 27 and a motor cooling electromagnetic valve 28, wherein the outer wall of a compressor 4 is communicated with the top of an evaporator 5 through the eighth pipe 26, the outer wall of the compressor 4 is communicated with a condenser 6 through the ninth pipe 27, the motor cooling electromagnetic valve 28 is installed on the ninth pipe 27, the motor cooling electromagnetic valve 28 is in signal connection with a main controller 1, the main controller 1 detects that the compressor 4 operates through a signal fed back by a frequency converter 1, the main controller 1 controls the motor cooling electromagnetic valve 28 to be opened, a medium in the condenser 6 flows into the outer wall of the compressor 4 through the ninth pipe 27 to be cooled and then flows into the evaporator 5 through the eighth pipe 26, the main controller 1 detects that the compressor 4 stops operating through the signal fed back by the frequency converter 1, and the main controller 1 controls the motor cooling electromagnetic valve 28, thereby providing a cooling system for the compressor 4.
The control process of the magnetic suspension refrigeration compressor control device comprises the following steps:
when a worker starts a magnetic suspension refrigeration compressor control device, a main controller 1 sends an instruction to a magnetic bearing controller 3, the magnetic bearing controller 3 controls a magnetic bearing suspension main shaft of a compressor 4, then the magnetic bearing controller 3 feeds back a suspension signal to the main controller 1, the main controller 1 starts a frequency converter 2, the frequency converter 2 controls the rotating speed of the compressor 4, a chilled water temperature sensor 9 monitors the temperature of a liquid medium in a water outlet pipe 7 in real time, and transmits the signal to the main controller 1, the temperature monitored by the chilled water temperature sensor 9, the main controller 1 transmits the signal to the frequency converter 2, and the frequency converter 2 controls the rotating speed of the compressor 4 according to the signal.
The compressor 4 discharges high-temperature and high-pressure refrigerant gas to the condenser 6 through the first pipe body 10, heat is transferred to a heat-carrying medium through the condenser 6 and then changed into liquid, the high-pressure refrigerant liquid from the condenser 6 is divided into two paths, the refrigerant liquid of the main path directly enters the heat exchanger 18 through the fourth pipe body 30, the refrigerant liquid of the auxiliary path is throttled and decompressed through the fifth pipe body 19 and the economic expansion valve 21 and then enters the heat exchanger 18, the two generate heat exchange in the heat exchanger 18, the refrigerant liquid of the auxiliary path is changed into gas after absorbing heat and then is sucked by the compressor 4 through the sixth pipe body 23, the refrigerant heat release of the main path is changed into subcooled liquid and then enters the evaporator 5 after being throttled and decompressed through the main electronic expansion valve 22, in the evaporator 5, the refrigerant of the main path absorbs heat in a low-temperature environment and then is changed into low-pressure gas and is sucked by the compressor 4, the refrigerant of main road and auxiliary road mixes in compressor 4 working chamber, further discharges through first body 10 after compressing again, constitutes closed work circulation circuit, and partly refrigerant liquid gets into compressor 4 cavity through ninth body 27 and cooling solenoid valve 28 in proper order, and the refrigerant liquid gets into evaporimeter 5 through eighth body 26 behind the cooling compressor 4, passes through by-pass solenoid valve 7 and bypass pipe 29 from the gas vent of compressor 4, is connected to evaporimeter 5 bottom, opens when the unit starts and shuts down, prevents that the unit from transshipping.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A magnetic suspension refrigeration compressor control device is characterized in that: comprises a main controller (1), a frequency converter (2), a magnetic bearing controller (3), a chilled water temperature sensor (9), a first pipe body (10), a second pipe body (11) and a heat exchange device, a box body is arranged on a condenser (6), the main controller (1), the frequency converter (2) and the magnetic bearing controller (3) are respectively installed in the box body, a water inlet pipe (8) is arranged on one side of the condenser (6), a water outlet pipe (7) is arranged on one side of an evaporator (5), the chilled water temperature sensor (9) is installed in the water outlet pipe (7), the first side of a compressor (4) is communicated to the top of the condenser (6) through the first pipe body (10), the first end of the compressor (4) is communicated to the top of the evaporator (5) through the second pipe body (11), the bottom of the condenser (6) is communicated to the top of the evaporator (5) through the heat exchange device, signals of the compressor (4) are respectively, the controller of the frequency converter (2), the magnetic bearing controller (3) and the chilled water temperature sensor (9) are all connected to the main controller (1) in a signal mode, and the main controller (1) is externally connected with a circuit.
2. A magnetic levitation refrigeration compressor control apparatus as recited in claim 1 wherein: the compressor (4) is a magnetic levitation centrifugal compressor.
3. A magnetic levitation refrigeration compressor control apparatus as recited in claim 1 wherein: still include condensing pressure sensor (16), evaporating pressure sensor (17), exhaust pressure sensor (13), intake air temperature sensor (14) and intake pressure sensor (15), install exhaust pressure sensor (13) in first body (10), install intake air temperature sensor (14) and intake pressure sensor (15) in second body (11) respectively, condenser (6) inner wall top installation condensing pressure sensor (16), evaporimeter (5) inner wall top installation evaporating pressure sensor (17), condensing pressure sensor (16), evaporating pressure sensor (17), exhaust pressure sensor (13), intake air temperature sensor (14) and intake pressure sensor (15) signal connection to main control unit (1).
4. A magnetic levitation refrigeration compressor control apparatus as recited in claim 1 wherein: the heat exchange device comprises a heat exchanger (18), a fifth pipe body (19), a seventh pipe body (20), an economic electronic expansion valve (21), a main electronic expansion valve (22), an evaporator liquid level sensor (31), a sixth pipe body (23) and an air supplementing pressure sensor (24), wherein the bottom of a condenser (6) is communicated to the upper part of the heat exchanger (18) through the fourth pipe body (30), the bottom of the condenser (6) is communicated to the lower part of the heat exchanger (18) through the fifth pipe body (19), the economic electronic expansion valve (21) is installed on the fifth pipe body (19), the bottom of the heat exchanger (18) is communicated to the top of an evaporator (5) through the seventh pipe body (20), the main electronic expansion valve (22) is installed on the seventh pipe body (20), the top of the heat exchanger (18) is communicated to the first side of a compressor (4) through the sixth pipe body (23), the air supplementing pressure sensor (, an evaporator liquid level sensor (31) is installed on one side of the inner wall of the evaporator (5), and the evaporator liquid level sensor (31), the economic electronic expansion valve (21), the main electronic expansion valve (22) and the air supply pressure sensor (24) are all connected to the main controller (1) in a signal mode.
5. A magnetic levitation refrigeration compressor control apparatus as recited in claim 1 wherein: the heat exchange device is a third pipe body (12).
6. A magnetic levitation refrigeration compressor control apparatus as recited in claim 1 wherein: still include bypass pipe (29) and bypass solenoid valve (25), evaporimeter (5) bottom is passed through bypass pipe (29) and is linked to first body (10), installation bypass solenoid valve (25) on bypass pipe (29), bypass solenoid valve (25) signal connection to main control unit (1).
7. A magnetic levitation refrigeration compressor control apparatus as recited in claim 1 wherein: still include eighth body (26), ninth body (27) and motor cooling solenoid valve (28), compressor (4) outer wall is linked together through eighth body (26) and evaporimeter (5) top, and compressor (4) outer wall is linked together through ninth body (27) and condenser (6), installs motor cooling solenoid valve (28) on ninth body (27), and motor cooling solenoid valve (28) signal connection is to main control unit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020985269.0U CN212227449U (en) | 2020-06-02 | 2020-06-02 | Magnetic suspension refrigeration compressor control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020985269.0U CN212227449U (en) | 2020-06-02 | 2020-06-02 | Magnetic suspension refrigeration compressor control device |
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| Publication Number | Publication Date |
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| CN212227449U true CN212227449U (en) | 2020-12-25 |
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| CN202020985269.0U Active CN212227449U (en) | 2020-06-02 | 2020-06-02 | Magnetic suspension refrigeration compressor control device |
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| CN (1) | CN212227449U (en) |
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