CN105508195A - Semi-hermetic refrigeration compressor - Google Patents

Semi-hermetic refrigeration compressor Download PDF

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Publication number
CN105508195A
CN105508195A CN201610042184.7A CN201610042184A CN105508195A CN 105508195 A CN105508195 A CN 105508195A CN 201610042184 A CN201610042184 A CN 201610042184A CN 105508195 A CN105508195 A CN 105508195A
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CN
China
Prior art keywords
semi
frequency
refrigeration compressor
hermetic refrigeration
variable
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Pending
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CN201610042184.7A
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Chinese (zh)
Inventor
何自成
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Zhejiang Commercial Machinery Factory Co Ltd
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Zhejiang Commercial Machinery Factory Co Ltd
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Priority to CN201610042184.7A priority Critical patent/CN105508195A/en
Publication of CN105508195A publication Critical patent/CN105508195A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00Control, 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
    • F04B49/06Control using electricity
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00Motor parameters
    • F04B2203/02Motor parameters of rotating electric motors
    • F04B2203/0208Power
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2203/00Motor parameters
    • F04B2203/02Motor parameters of rotating electric motors
    • F04B2203/0209Rotational speed

Abstract

The invention provides a semi-hermetic refrigeration compressor which comprises a main controller, a frequency conversion controller and a permanent magnet synchronization variable-frequency motor. The main controller, the frequency conversion controller and the permanent magnet synchronization variable-frequency motor are electrically connected in sequence. The main controller detects the operation working condition of the semi-hermetic refrigeration compressor in real time and obtains and sends operation data of the semi-hermetic refrigeration compressor. The frequency conversion controller receives the operation data from the main controller and adjusts frequency and controls the permanent magnet synchronization variable-frequency motor to change output power and the rotating speed according to the operation data. The permanent magnet synchronization variable-frequency motor and the frequency conversion controller are additionally arranged so that the semi-hermetic refrigeration compressor can work in a high-efficient state all the time and achieve the purpose of energy conservation.

Description

Semi-hermetic refrigeration compressor
Technical field
The present invention relates to compressor, in particular to semi-hermetic refrigeration compressor.
Background technique
The control of existing refrigeration compressor, all adopts asynchronous motor and outside to set up automatic control box, is only to reach to control for the purpose of compressor safe operation and protection.
Due to the change of refrigeration compressor operating conditions, refrigeration compressor is when initial work, built-in asynchronous motor working load is larger, asynchronous motor can export with rated power, but when refrigeration compressor is in normal work operating mode, the load of the built-in asynchronous motor of refrigeration compressor is very little, often asynchronous motor rated power about 50%, but asynchronous motor exports with rated power, and namely frequency determined by asynchronous motor, and frequency cannot change always.Therefore, the duty factor of refrigeration compressor when starting is larger, when normal work, load is much little, always in the load of going drive one little with a heavy motor, asynchronous motor is the state being in low load with strong power always, thus making asynchronous motor operational efficiency very low, refrigeration compressor usefulness is also very low.
Summary of the invention
In view of this, the object of the embodiment of the present invention is to provide semi-hermetic refrigeration compressor, to increase permanent-magnet synchronous variable-frequency motor and frequency-variable controller, thus makes semi-hermetic refrigeration compressor be in high efficiency operation always and reach energy-conservation object.
A kind of semi-hermetic refrigeration compressor, it comprises master controller, frequency-variable controller and permanent-magnet synchronous variable-frequency motor, this master controller, this frequency-variable controller and this permanent-magnet synchronous variable-frequency motor are electrically connected successively, the operating conditions of this this semi-hermetic refrigeration compressor of master controller detecting real-time and the service data obtaining this semi-hermetic refrigeration compressor send, this frequency-variable controller receives the service data from this master controller, adjusts frequency and control this permanent-magnet synchronous variable-frequency motor to change output power and rotating speed according to the service data received.
Further, this operating conditions is the operating current of this semi-hermetic refrigeration compressor.
Further, this operating conditions is the operating temperature of this permanent-magnet synchronous variable-frequency motor, this semi-hermetic refrigeration compressor also comprises temperature inductor, this temperature inductor and this master controller are electrically connected, the operating temperature of this temperature inductor detecting real-time permanent-magnet synchronous variable-frequency motor and transmit this detecting temperature data to this master controller.
Further, this operating conditions is the working pressure of this semi-hermetic refrigeration compressor, this semi-hermetic refrigeration compressor also comprises pressure inductor, this pressure inductor and this master controller are electrically connected, the working pressure of this this semi-hermetic refrigeration compressor of pressure inductor detecting real-time and transmit this detecting pressure data to this master controller.
Further, this frequency-variable controller and this permanent-magnet synchronous variable-frequency motor split design.
Further, this permanent-magnet synchronous variable-frequency motor is built in this semi-hermetic refrigeration compressor, this semi-hermetic refrigeration compressor also comprises motor cover, and this motor cover covers this permanent-magnet synchronous variable-frequency motor, is connected in the motor cover of this permanent-magnet synchronous variable-frequency motor outside this frequency-variable controller.
Further, this operating conditions is the operating mode load of this semi-hermetic refrigeration compressor.
Further, this master controller detect this semi-hermetic refrigeration compressor operating conditions load very large time send a signal to this frequency-variable controller, this frequency-variable controller reduces frequency of okperation and control this permanent-magnet synchronous variable-frequency motor with slow-speed of revolution entry into service.
Further, this master controller detects this semi-hermetic refrigeration compressor operating conditions load and sends a signal to this frequency-variable controller when reducing gradually, this frequency-variable controller adjustment frequency of okperation and improve this permanent-magnet synchronous variable-frequency motor gradually running rotating speed to maximum (top) speed.
Further, this master controller detects when this semi-hermetic refrigeration compressor operating conditions reaches default operating mode and sends a signal to this frequency-variable controller, this frequency-variable controller adjustment frequency of okperation and reduce this permanent-magnet synchronous variable-frequency motor gradually running rotating speed to a desired speed.
Permanent-magnet synchronous variable-frequency motor introduced by semi-hermetic refrigeration compressor of the present invention, replace existing asynchronous motor, and add frequency-variable controller, frequency-variable controller changes the output power and rotating speed of coming control break frequency and corresponding change permanent-magnet synchronous variable-frequency motor in real time according to the running state of semi-hermetic refrigeration compressor, solve existing compressor when normal work operating mode, built-in motor is in the inefficient working state of low load with strong power for a long time, and no matter semi-hermetic refrigeration compressor of the present invention is fully loaded, under off-load or no-load condition, all can ensure that the built-in permanent-magnet synchronous variable-frequency motor of semi-hermetic refrigeration compressor runs under being in efficient energy-saving state all the time.
For making above-mentioned purpose of the present invention, feature and advantage become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, be described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 shows the structural representation of a kind of semi-hermetic refrigeration compressor that the embodiment of the present invention provides;
The module that Fig. 2 shows the semi-hermetic refrigeration compressor shown in Fig. 1 is electrically connected schematic diagram.
Primary component symbol description:
1 semi-hermetic refrigeration compressor
2 filtrating equipments
3 stators
4 rotors
50 frequency-variable controllers
6 permanent magnets
7 oil sumps
8 main shafts
9 motor cavities
10 suction ends
11 permanent-magnet synchronous variable-frequency motors
12 motor cover
13 Aspirating valvess
20 master controllers
30 temperature inductors
40 pressure inductors
Embodiment
Below in conjunction with accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and illustrate in usual accompanying drawing herein can be arranged with various different configuration and design.Therefore, below to the detailed description of the embodiments of the invention provided in the accompanying drawings and the claimed scope of the present invention of not intended to be limiting, but selected embodiment of the present invention is only represented.Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the prerequisite not making creative work, belongs to the scope of protection of the invention.
Fig. 1 shows the structural representation of a kind of semi-hermetic refrigeration compressor 1 that the embodiment of the present invention provides.
Current semi-hermetic refrigeration compressor has two kinds, is respectively screw type semi-hermetic refrigeration compressor and piston type semi-hermetic refrigeration compressor.Screw type semi-hermetic refrigeration compressor is identical in gas compression mode with piston type semi-hermetic refrigeration compressor, all belongs to displacement type compressor, and that is they are all lean on the change of volume and make gas compression.Difference is the mode difference that these two kinds of compressors realize swept volume change.
Semi-hermetic refrigeration compressor 1 of the present invention is screw type semi-hermetic refrigeration compressor or piston type semi-hermetic refrigeration compressor, and Fig. 1 is piston type semi-hermetic refrigeration compressor.In the present invention, screw type semi-hermetic refrigeration compressor is identical with piston type semi-hermetic refrigeration compressor working principle, therefore, no longer screw type semi-hermetic refrigeration compressor is described at this.
Semi-hermetic refrigeration compressor 1 is applied in refrigeration system, is large parts of refrigeration system.Refrigeration system comprises refrigeration agent and containing four large parts of semi-hermetic refrigeration compressor 1, does not describe in this structure to refrigeration system.
Semi-hermetic refrigeration compressor 1 comprises filtrating equipment 2, permanent-magnet synchronous variable-frequency motor 11, frequency-variable controller 50, permanent magnet 6, oil sump 7, main shaft 8, motor cavity 9, suction end 10, motor cover 12 and Aspirating valves 13 from hardware configuration.Semi-hermetic refrigeration compressor 1 also comprises miscellaneous part, as piston, compressor block etc., does not repeat one by one at this.
Permanent-magnet synchronous variable-frequency motor 11 is positioned at motor cavity 9, and namely motor cavity 9 accommodates permanent-magnet synchronous variable-frequency motor 11, by motor cover 12, permanent-magnet synchronous variable-frequency motor 11 is enclosed in motor cavity 9.Permanent-magnet synchronous variable-frequency motor 11 comprises stator 3 and rotor 4.Permanent-magnet synchronous variable-frequency motor 11 also comprises miscellaneous part, does not describe at this.
Motor take magnetic field as the calutron that medium carries out mechanical energy and electric energy and mutually changes.Permanent-magnet synchronous variable-frequency motor 11 synchronously refer to that the rotating speed of its power frequency and rotor 4 is synchronous.The features such as the volume of permanent-magnet synchronous variable-frequency motor 11 is relatively little, starting torque is large.
Frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11 are electrically connected, and frequency-variable controller 50 controls permanent-magnet synchronous variable-frequency motor 11 and works.Be specially: frequency-variable controller 50 controls the rotation of permanent-magnet synchronous variable-frequency motor 11 by changing permanent-magnet synchronous variable-frequency motor 11 working power frequency.
Frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11 are integrated design or split design.In an embodiment of the present invention, frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11 design for split, are namely connected in the motor cover 12 of permanent-magnet synchronous variable-frequency motor 11 outside frequency-variable controller 50.Designed by the split of frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11, facilitate user installation, debugging, maintenance frequency-variable controller 50.
Permanent magnet 6 is positioned at the oil sump 7 of semi-hermetic refrigeration compressor 1.In an embodiment of the present invention, permanent magnet 6 is adsorbed on the bottom of oil sump 7.Store semi-hermetic refrigeration compressor 1 in oil sump 7 to work required lubricant oil.Permanent magnet 6 is used for the ferromagnetic substance in adsorpting lubrication oil.
Adsorbed by the permanent magnet 6 pairs of ferromagnetic substances be arranged in oil sump 7, can prevent these ferromagnetic substances from moving further and entering built-in motor chamber 9, play the effect of protection permanent-magnet synchronous variable-frequency motor 11.Permanent magnet 6 is adsorbed on bottom oil sump 7 by own magnetic force.Permanent magnet 6 is square.
Refrigeration system can produce metallic dust and ferromagnetic substance in the course of the work.Filtrating equipment 2 is positioned at the suction end 10 of semi-hermetic refrigeration compressor 1.In an embodiment of the present invention, filtrating equipment 2 is arranged on the air intake passage of suction end 10.Filtrating equipment 2 is used for filtering absorption and gets back to ferromagnetic substance the refrigeration agent of semi-hermetic refrigeration compressor 1, metallic dust and lubricant oil from refrigeration system; with filter out oarse-grained impurity in air, play the effect of protection semi-hermetic refrigeration compressor 1 internal structure.Filtrating equipment 2 is the magnetic mesh filters of band.Filtrating equipment 2 is arranged in the air intake passage of semi-hermetic refrigeration compressor 1 body suction end 10, is fixed by Aspirating valves 13 flange.
Be equipped with a main shaft 8 in semi-hermetic refrigeration compressor 1 body axis hole, the stator 3 of permanent-magnet synchronous variable-frequency motor 11 is assemblied in the motor cavity 9 of body, and rotor 4 endoporus of permanent-magnet synchronous variable-frequency motor 11 is assemblied in by flat key transmission on main shaft 8, bolton.The rotor 4 of permanent-magnet synchronous variable-frequency motor 11 is concordant with stator 3 end face of permanent-magnet synchronous variable-frequency motor 11, rotor 4 external diameter of permanent-magnet synchronous variable-frequency motor 11 and stator 3 internal diameter of permanent-magnet synchronous variable-frequency motor 11 leave air gap, and the rotor 4 of permanent-magnet synchronous variable-frequency motor 11 is sealed by motor cover 12 with the stator 3 of permanent-magnet synchronous variable-frequency motor 11.Frequency-variable controller 50 is arranged on motor cover 12 exterior edge face.
The module that Fig. 2 shows the semi-hermetic refrigeration compressor shown in Fig. 1 is electrically connected schematic diagram.
Semi-hermetic refrigeration compressor 1 comprises master controller 20, temperature inductor 30, pressure inductor 40, frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11 from circuit structure.Temperature inductor 30, pressure inductor 40 are electrically connected with master controller 20 respectively.Master controller 20, frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11 are electrically connected successively.
The operating conditions of semi-hermetic refrigeration compressor 1 comprises multiple Operational Limits, as load, electric current, pressure and temperature etc. that semi-hermetic refrigeration compressor 1 works.Master controller 20 is for monitoring operating mode load and the operating current of semi-hermetic refrigeration compressor 1.Pressure inductor 40 for monitoring the working pressure of semi-hermetic refrigeration compressor 1, as evaporating pressure, the condensing pressure of semi-hermetic refrigeration compressor 1.Temperature inductor 30 for detecting the operating temperature of semi-hermetic refrigeration compressor 1, as the temperature of permanent-magnet synchronous variable-frequency motor 11.Pressure inductor 40 and temperature inductor 30 all realize being electrically connected with the controller in semi-hermetic refrigeration compressor 1, and the pressure of monitoring separately, temperature data are transferred to master controller 20.Master controller 20 transmits each Monitoring Data to frequency-variable controller 50, and frequency-variable controller 50 and permanent-magnet synchronous variable-frequency motor 11 are electrically connected, and frequency-variable controller 50 changes frequency according to the service data of each monitoring and control permanent-magnet synchronous variable-frequency motor 11 changes rotating speed.
Be specially, when this operating conditions is the operating temperature of this permanent-magnet synchronous variable-frequency motor 11, the operating temperature of this temperature inductor 30 detecting real-time permanent-magnet synchronous variable-frequency motor 11 and transmit this detecting temperature data to this master controller 20.
When this operating conditions is the working pressure of this semi-hermetic refrigeration compressor 1, the working pressure of this this semi-hermetic refrigeration compressor 1 of pressure inductor 40 detecting real-time and transmit this detecting pressure data to this master controller 20.
This operating conditions is the operating mode load of this semi-hermetic refrigeration compressor 1.
This master controller 20 detect this semi-hermetic refrigeration compressor 1 operating conditions load very large time send a signal to this frequency-variable controller 50, this frequency-variable controller 50 reduces frequency of okperation and controls this permanent-magnet synchronous variable-frequency motor 11 with slow-speed of revolution entry into service.
This master controller 20 detects this semi-hermetic refrigeration compressor 1 operating conditions load and sends a signal to this frequency-variable controller 50 when reducing gradually, and the running rotating speed that this frequency-variable controller 50 adjusts frequency of okperation and improves this permanent-magnet synchronous variable-frequency motor 11 is gradually to maximum (top) speed.
This master controller 20 detects when this semi-hermetic refrigeration compressor 1 operating conditions reaches default operating mode and sends a signal to this frequency-variable controller 50, and the running rotating speed that this frequency-variable controller 50 adjusts frequency of okperation and reduces this permanent-magnet synchronous variable-frequency motor 11 is gradually to a desired speed.
When semi-hermetic refrigeration compressor 1 initial work, because semi-hermetic refrigeration compressor 1 operating mode load is larger, permanent-magnet synchronous variable-frequency motor 11 load in semi-hermetic refrigeration compressor 1 is caused to increase, master controller 20 transmits the service data of larger operating mode load to frequency-variable controller 50, frequency-variable controller 50 does not allow the permanent-magnet synchronous variable-frequency motor 11 in semi-hermetic refrigeration compressor 1 directly enter high rotary speed working according to this larger operating conditions spatial load forecasting, namely frequency-variable controller 50 controls permanent-magnet synchronous variable-frequency motor 11 and starts working with the slow-speed of revolution, as controlled to export low-power and the slow-speed of revolution.
The running state of semi-hermetic refrigeration compressor 1 monitored in real time by master controller 20, and the service data of monitoring is sent to frequency-variable controller 50, frequency-variable controller 50 changes the output power and rotating speed of coming control break frequency and corresponding change permanent-magnet synchronous variable-frequency motor 11 according to the running state of semi-hermetic refrigeration compressor 1.Along with the load of semi-hermetic refrigeration compressor 1 operating conditions reduces gradually; frequency-variable controller 50 is by progressively improving frequency to control the output power and rotating speed that progressively improve permanent-magnet synchronous variable-frequency motor 11; control permanent-magnet synchronous variable-frequency motor 11 and improve rotating speed as frequency-variable controller 50 progressively improves frequency gradually according to a preset ratio, achieve that permanent-magnet synchronous variable-frequency motor 11 is in that energy-efficient state is run always, intelligent control and protection.
As shown in the table, suppose that the rated power of permanent-magnet synchronous variable-frequency motor 11 is 0.5PN.When semi-hermetic refrigeration compressor 1 initial work, namely during T0, semi-hermetic refrigeration compressor 1 operating mode load is at full capacity, and the output power that frequency-variable controller 50 controls permanent-magnet synchronous variable-frequency motor 11 is 0.1PN.Now, it is 0.1 unit that the ability of semi-hermetic refrigeration compressor 1 exports, and semi-hermetic refrigeration compressor 1 is also abnormal to be started.
Frequency-variable controller 50 receives the running state of the semi-hermetic refrigeration compressor 1 of master controller 20 real-time Transmission, As time goes on, when the time is T1, the load of semi-hermetic refrigeration compressor 1 operating conditions reduces gradually, the output power that frequency-variable controller 50 controls permanent-magnet synchronous variable-frequency motor 11 brings up to 0.15PN, namely improves the rotating speed of permanent-magnet synchronous variable-frequency motor 11.
Time Operating mode load Output power of motor Ability exports
T0 100% 0.1PN 0.1
T1 90% 0.15PN 0.1350
T2 80% 0.18PN 0.144
T3 70% 0.23PN 0.161
T4 60% 0.31PN 0.186
T5 50% 0.42PN 0.21
The rest may be inferred, when semi-hermetic refrigeration compressor 1 arrives T5 working time, the load of semi-hermetic refrigeration compressor 1 operating conditions is reduced to load required when normally working, the i.e. default operating mode of normal work, the output power that frequency-variable controller 50 controls permanent-magnet synchronous variable-frequency motor 11 brings up to 0.42PN, thus uses the permanent-magnet synchronous variable-frequency motor 11 that rated power is 0.5PN just can guarantee that semi-hermetic refrigeration compressor 1 is in stable working state.
The present invention avoids in order to semi-hermetic refrigeration compressor 1 initial load is comparatively large, and causes built-in motor power must join large situation, as existing compressor normally works in advance, then must configure the motor that rated power is 1PN.Therefore, semi-hermetic refrigeration compressor 1 of the present invention is when nominal situation works, and permanent-magnet synchronous variable-frequency motor 11 runs be in substantially fully loaded and high-effect state under the control of frequency-variable controller 50 under always, thus reaches energy-conservation object.
When semi-hermetic refrigeration compressor 1 operating mode does not reach default operating mode, along with the operating load of semi-hermetic refrigeration compressor 1 reduces gradually, frequency-variable controller 50 controls the output frequency improving permanent-magnet synchronous variable-frequency motor 11 gradually, permanent-magnet synchronous variable-frequency motor 11 is made to keep 100% power stage, permanent-magnet synchronous variable-frequency motor 11 exports with rated power, and namely frequency-variable controller 50 controls to improve gradually the running rotating speed of permanent-magnet synchronous variable-frequency motor 11 to maximum (top) speed.
When semi-hermetic refrigeration compressor 1 operating mode reaches default operating mode, frequency-variable controller 50 controls the output frequency reducing permanent-magnet synchronous variable-frequency motor 11 gradually, permanent-magnet synchronous variable-frequency motor 11 is adjusted to and keeps presetting the power stage of stable conditions, namely frequency-variable controller 50 controls to reduce gradually the running rotating speed of permanent-magnet synchronous variable-frequency motor 11 to a desired speed.
The loading of semi-hermetic refrigeration compressor 1 or off-load increase according to semi-hermetic refrigeration compressor 1 ability need size or diminish.Loading and off-load are can frequent two actions occurred.When the ability need of semi-hermetic refrigeration compressor 1 is so not large, do not need to export so large ability time, frequency-variable controller 50 can calculate according to semi-hermetic refrigeration compressor 1 ability need, the ability adjusting permanent-magnet synchronous variable-frequency motor 11 according to result of calculation exports, namely to reduce the power stage of permanent-magnet synchronous variable-frequency motor 11, become off-load.When the ability need of semi-hermetic refrigeration compressor 1 is larger, need export so large ability time, frequency-variable controller 50 can calculate according to semi-hermetic refrigeration compressor 1 ability need, the ability adjusting permanent-magnet synchronous variable-frequency motor 11 according to result of calculation exports, namely to improve the power stage of permanent-magnet synchronous variable-frequency motor 11, the loading of meaning.
Semi-hermetic refrigeration compressor 1 provided by the invention, due to built-in permanent-magnet synchronous variable-frequency motor 11, utilize the frequency conversion control technique of frequency-variable controller 50, needed for the operating conditions of semi-hermetic refrigeration compressor 1, namely semi-hermetic refrigeration compressor 1 runs required actual power demand, with the situation of semi-hermetic refrigeration compressor 1 rated current, control the rotating speed of permanent-magnet synchronous variable-frequency motor 11, be in high efficiency operation to meet permanent-magnet synchronous variable-frequency motor 11 always.
Because the magnetic field of permanent-magnet synchronous variable-frequency motor 11 is produced by permanent magnet, thus the excitation loss (copper loss) of avoiding producing magnetic field by field current and causing; The external characteristics efficiency curve of permanent-magnet synchronous variable-frequency motor 11 is compared existing asynchronous motor efficiency value when underloading and is wanted high a lot, and this is permanent-magnet synchronous variable-frequency motor in energy-conservation, compares the advantage that asynchronous motor is maximum.
Because permanent-magnet synchronous variable-frequency motor 11 power factor is high, compare its current of electric of existing asynchronous motor so less, correspondingly the stator copper loss of motor is less, and efficiency is also higher.
Permanent-magnet synchronous variable-frequency motor introduced by semi-hermetic refrigeration compressor of the present invention, replace existing asynchronous motor, and add frequency-variable controller, frequency-variable controller changes the output power and rotating speed of coming control break frequency and corresponding change permanent-magnet synchronous variable-frequency motor in real time according to the running state of semi-hermetic refrigeration compressor, solve existing compressor when normal work operating mode, built-in motor is in the inefficient working state of low load with strong power for a long time, and no matter semi-hermetic refrigeration compressor of the present invention is fully loaded, under off-load or no-load condition, all can ensure that the built-in permanent-magnet synchronous variable-frequency motor of semi-hermetic refrigeration compressor runs under being in efficient energy-saving state all the time.
In all examples be illustrated and described herein, any occurrence should be construed as merely exemplary, instead of as restriction, therefore, other examples of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to define further it and explain in accompanying drawing subsequently.
Block diagram in accompanying drawing shows architectural framework in the cards according to the system of multiple embodiment of the present invention and computer program, function and operation.In this, each square frame in block diagram can represent a part for module, block or a code, and a part for described module, block or code comprises one or more executable instruction for realizing the logical function specified.Also it should be noted that at some as in the realization of replacing, the function marked in square frame also can be different from occurring in sequence of marking in accompanying drawing.Such as, in fact two continuous print square frames can perform substantially concurrently, and they also can perform by contrary order sometimes, and this determines according to involved function.Also it should be noted that the combination of each square frame in block diagram and the square frame in block diagram, can realize by the special hardware based system of the function put rules into practice or action, or can realize with the combination of specialized hardware and computer order.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.

Claims (10)

1. a semi-hermetic refrigeration compressor, it is characterized in that, this semi-hermetic refrigeration compressor comprises master controller, frequency-variable controller and permanent-magnet synchronous variable-frequency motor, this master controller, this frequency-variable controller and this permanent-magnet synchronous variable-frequency motor are electrically connected successively, the operating conditions of this this semi-hermetic refrigeration compressor of master controller detecting real-time and the service data obtaining this semi-hermetic refrigeration compressor send, this frequency-variable controller receives the service data from this master controller, adjust frequency according to the service data received and control this permanent-magnet synchronous variable-frequency motor and change output power and rotating speed.
2. semi-hermetic refrigeration compressor according to claim 1, is characterized in that, this operating conditions is the operating current of this semi-hermetic refrigeration compressor.
3. semi-hermetic refrigeration compressor according to claim 1, it is characterized in that, this operating conditions is the operating temperature of this permanent-magnet synchronous variable-frequency motor, this semi-hermetic refrigeration compressor also comprises temperature inductor, this temperature inductor and this master controller are electrically connected, the operating temperature of this temperature inductor detecting real-time permanent-magnet synchronous variable-frequency motor and transmit this detecting temperature data to this master controller.
4. semi-hermetic refrigeration compressor according to claim 1, it is characterized in that, this operating conditions is the working pressure of this semi-hermetic refrigeration compressor, this semi-hermetic refrigeration compressor also comprises pressure inductor, this pressure inductor and this master controller are electrically connected, the working pressure of this this semi-hermetic refrigeration compressor of pressure inductor detecting real-time and transmit this detecting pressure data to this master controller.
5. semi-hermetic refrigeration compressor according to claim 1, is characterized in that, this frequency-variable controller and this permanent-magnet synchronous variable-frequency motor split design.
6. semi-hermetic refrigeration compressor according to claim 5, it is characterized in that, this permanent-magnet synchronous variable-frequency motor is built in this semi-hermetic refrigeration compressor, this semi-hermetic refrigeration compressor also comprises motor cover, this motor cover covers this permanent-magnet synchronous variable-frequency motor, is connected in the motor cover of this permanent-magnet synchronous variable-frequency motor outside this frequency-variable controller.
7. semi-hermetic refrigeration compressor according to claim 1, is characterized in that, this operating conditions is the operating mode load of this semi-hermetic refrigeration compressor.
8. semi-hermetic refrigeration compressor according to claim 7, it is characterized in that, this master controller detect this semi-hermetic refrigeration compressor operating conditions load very large time send a signal to this frequency-variable controller, this frequency-variable controller reduces frequency of okperation and control this permanent-magnet synchronous variable-frequency motor with slow-speed of revolution entry into service.
9. semi-hermetic refrigeration compressor according to claim 7, it is characterized in that, this master controller detects this semi-hermetic refrigeration compressor operating conditions load and sends a signal to this frequency-variable controller when reducing gradually, this frequency-variable controller adjustment frequency of okperation and improve this permanent-magnet synchronous variable-frequency motor gradually running rotating speed to maximum (top) speed.
10. semi-hermetic refrigeration compressor according to claim 1, it is characterized in that, this master controller detects when this semi-hermetic refrigeration compressor operating conditions reaches default operating mode and sends a signal to this frequency-variable controller, this frequency-variable controller adjustment frequency of okperation and reduce this permanent-magnet synchronous variable-frequency motor gradually running rotating speed to a desired speed.
CN201610042184.7A 2016-01-21 2016-01-21 Semi-hermetic refrigeration compressor Pending CN105508195A (en)

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CN201610042184.7A CN105508195A (en) 2016-01-21 2016-01-21 Semi-hermetic refrigeration compressor

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490089B1 (en) * 1990-12-11 1996-09-04 Zanussi Elettromeccanica S.p.A. Improvement in refrigeration compressors with electronic control arrangement
WO2009048578A1 (en) * 2007-10-08 2009-04-16 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
CN202868911U (en) * 2012-09-13 2013-04-10 日照华际自动化科技有限公司 Control system of air conditioner
CN202956649U (en) * 2012-12-10 2013-05-29 佛山达沃斯动力科技有限公司 Variable frequency energy-saving control and remote wireless management system for air compressor
CN105156297A (en) * 2015-10-09 2015-12-16 浙江商业机械厂有限公司 Efficient energy-saving semi-closed refrigerating compressor
CN205370894U (en) * 2016-01-21 2016-07-06 浙江商业机械厂有限公司 Semi -closed compressor of frequency conversion

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0490089B1 (en) * 1990-12-11 1996-09-04 Zanussi Elettromeccanica S.p.A. Improvement in refrigeration compressors with electronic control arrangement
WO2009048578A1 (en) * 2007-10-08 2009-04-16 Emerson Climate Technologies, Inc. Variable speed compressor protection system and method
CN202868911U (en) * 2012-09-13 2013-04-10 日照华际自动化科技有限公司 Control system of air conditioner
CN202956649U (en) * 2012-12-10 2013-05-29 佛山达沃斯动力科技有限公司 Variable frequency energy-saving control and remote wireless management system for air compressor
CN105156297A (en) * 2015-10-09 2015-12-16 浙江商业机械厂有限公司 Efficient energy-saving semi-closed refrigerating compressor
CN205370894U (en) * 2016-01-21 2016-07-06 浙江商业机械厂有限公司 Semi -closed compressor of frequency conversion

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Application publication date: 20160420