CN205232076U - Air conditioning system and centrifugal unit and variable frequency control device thereof - Google Patents
Air conditioning system and centrifugal unit and variable frequency control device thereof Download PDFInfo
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- CN205232076U CN205232076U CN201521000052.5U CN201521000052U CN205232076U CN 205232076 U CN205232076 U CN 205232076U CN 201521000052 U CN201521000052 U CN 201521000052U CN 205232076 U CN205232076 U CN 205232076U
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Abstract
The utility model discloses an air conditioning system and centrifugal unit and variable frequency control device thereof, variable frequency control device includes: a rectification circuit. Voltage stabilizing circuit, an inverter circuit who links to each other with voltage stabilizing circuit, its still with centrifugal unit in the compressor motor link to each other with the drive compressors motor, the 2nd inverter circuit who links to each other with voltage stabilizing circuit, its still with centrifugal unit in oil pump motor link to each other with drive oil pump motor, control an inverter circuit's first contravariant control panel, its power supply state that is used for monitoring power supply to a control inverter circuit moves with the braking mode when the power off condition, control the 2nd inverter circuit's second contravariant control panel, it is used for the 2nd inverter circuit of control utilized compressor motor braking to produce when the power off condition electric energy and continuation to move with normal mode. From this, through the reducible repeat circuit of sharing rectifier circuit to oil pump motor's operation is supported to the electric energy that available compressor motor braking produced when having a power failure suddenly, avoids energy dissipation.
Description
Technical field
The utility model relates to air-conditioning technical field, particularly a kind of frequency-converting control device for centrifugal chiller, a kind of there is the centrifugal chiller of this device and a kind of air-conditioning system.
Background technology
Relevant centrifugal chiller mainly comprises two motors and compressor electric motor and Oil pump electrical machinery; in the related; centrifugal chiller is controlled by adopting following methods; namely when starting; first control oil pump electric motor starting, and after oil pressure is stable, control compressor electric motor startup again, and when shutting down; first control compressor electric motor to shut down, and after compressor electric motor is out of service control oil pump motor stopping again.
But correlation technique exists following problem: one is, compressor and oil pump respectively by the Frequency Converter Control of two platform independent, thus need separately to connect power line, control line, and structural configuration is more complicated also; Two are, under unexpected powering-off state, oil pump can dead electricity immediately, oil pressure difference is reduced to below safety value at once, thus cause bearing can not get good lubrication and wear and tear, and compressor variable frequency device controls compressor electric motor in retarding mode, thus need to increase brake resistance to avoid busbar voltage too high, but consuming braking energy by brake resistance can cause energy dissipation.
Therefore, correlation technique needs to improve.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, an object of the present utility model is to propose a kind of frequency-converting control device for centrifugal chiller, and the energy that this device can effectively utilize braking to produce is avoided energy dissipation, and can be reduced structure complexity.
Another object of the present utility model is to propose a kind of centrifugal chiller.Another object of the present utility model is to propose a kind of air-conditioning system.
For achieving the above object, the utility model proposes a kind of frequency-converting control device for centrifugal chiller on the one hand, and comprising: rectification circuit, the input of described rectification circuit is connected with power supply; Voltage stabilizing circuit, described voltage stabilizing circuit is connected with the output of described rectification circuit; First inverter circuit, described first inverter circuit is connected with described voltage stabilizing circuit, and described first inverter circuit is also connected to drive described compressor electric motor with the compressor electric motor in described centrifugal chiller; The second inverter circuit be connected in parallel with described first inverter circuit, described second inverter circuit is connected with described voltage stabilizing circuit, and described first inverter circuit is also connected to drive described Oil pump electrical machinery with the Oil pump electrical machinery in described centrifugal chiller; Control the first inversion control plate of described first inverter circuit, described first inversion control plate for monitoring the power supply state of described power supply, and controls described first inverter circuit and runs in retarding mode described compressor electric motor is braked when described power supply is in off-position; Control the second inversion control plate of described second inverter circuit, described second inversion control plate is used for controlling described second inverter circuit when described power supply is in off-position and utilizes described compressor electric motor brake the electric energy of generation and continue to run in the normal mode to think that described centrifugal chiller provides lubricating oil.
According to the frequency-converting control device for centrifugal chiller that the utility model proposes, the first inverter circuit and the second inverter circuit share rectification circuit and voltage stabilizing circuit, thus reduce repeat circuit, reduction means volume and complexity, and the first inversion control plate controls the first inverter circuit to be run in retarding mode to make compressor electric motor brake when power supply is in off-position, second inversion control plate controls the second inverter circuit and utilizes compressor electric motor brake the electric energy of generation and continue to run in the normal mode to think that centrifugal chiller provides lubricating oil when power supply is in off-position, thus when running into situation about having a power failure suddenly, can brake the power generating ratio time by compressor electric motor, support the operation of Oil pump electrical machinery with the electric energy that braking produces simultaneously, guarantee that before compressor electric motor stops oil pump provides reliable and stable oil pressure poor, reduce brake resistance, and avoid energy dissipation.
Further, described second inversion control plate can carry out with described first inversion control plate the power supply state that communicates to obtain described power supply.
Further, the described frequency-converting control device for centrifugal chiller also comprises: pressure detection circuit, described pressure detection circuit is for detecting the bearing pressure of described centrifugal chiller, wherein, described second inversion control plate is used for controlling described second inverter circuit to control the frequency of described Oil pump electrical machinery according to described bearing pressure.
Particularly, described rectification circuit has the first output and the second output, described voltage stabilizing circuit comprises: the first switch in parallel and charging resistor, first switch of described parallel connection is connected with the first output of described rectification circuit with one end of charging resistor, and described first switch is closed or disconnection under the control of described first inversion control plate; Storage capacitor, one end of described storage capacitor is connected with the other end of charging resistor with the first switch of described parallel connection, and the other end of described storage capacitor is connected with the second output of described rectification circuit; Grading resistor, described grading resistor and described storage capacitor are connected in parallel.
Particularly, described rectification circuit comprises rectifier bridge, and described rectifier bridge comprises the first to the 6th diode.
Particularly, described first inverter circuit comprises the first inverter bridge, and described first inverter bridge comprises the first to the 6th power switch pipe.
Particularly, described second inverter circuit comprises the second inverter bridge, and described second inverter bridge comprises the 7th to the 12 power switch pipe.
Particularly, described first switch can be relay switch.
For achieving the above object, the utility model proposes a kind of centrifugal chiller on the other hand, comprising: compressor electric motor and Oil pump electrical machinery; The described frequency-converting control device for centrifugal chiller, the described frequency-converting control device for centrifugal chiller is for controlling described compressor electric motor and described Oil pump electrical machinery.
According to the centrifugal chiller that the utility model proposes, by the above-mentioned frequency-converting control device for centrifugal chiller, can repeat circuit be reduced, reduce unit volume and complexity; And when running into situation about having a power failure suddenly; can brake the power generating ratio time by compressor electric motor; support the operation of Oil pump electrical machinery with the electric energy that braking produces simultaneously; guarantee that before compressor electric motor stops oil pump provides reliable and stable oil pressure poor; reduce brake resistance, and avoid energy dissipation.
For achieving the above object, the another aspect of the utility model proposes a kind of air-conditioning system, comprising: described centrifugal chiller.
According to the air-conditioning system that the utility model proposes, by the above-mentioned frequency-converting control device for centrifugal chiller, can repeat circuit be reduced, reduce unit volume and complexity; And when running into situation about having a power failure suddenly; can brake the power generating ratio time by compressor electric motor; support the operation of Oil pump electrical machinery with the electric energy that braking produces simultaneously; guarantee that before compressor electric motor stops oil pump provides reliable and stable oil pressure poor; reduce brake resistance, and avoid energy dissipation.
Accompanying drawing explanation
Fig. 1 is the block diagram of the frequency-converting control device for centrifugal chiller according to the utility model embodiment;
Fig. 2 is the block diagram of the frequency-converting control device for centrifugal chiller according to the utility model embodiment;
Fig. 3 is the circuit theory diagrams of the frequency-converting control device for centrifugal chiller according to the utility model specific embodiment.
Reference numeral:
Rectification circuit 10, voltage stabilizing circuit 20, first inverter circuit 30, second inverter circuit 40, first inversion control plate 50, second inversion control plate 60, power supply AC, compressor electric motor M1, Oil pump electrical machinery M2, pressure detection circuit 70, first K switch M1, charging resistor RL, storage capacitor C1/C2, grading resistor R1/R2, the first to the 6th diode D1-D6, the first to the 6th power switch pipe Q1-Q6 and the 7th to the 12 power switch pipe Q7-Q12.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
Below with reference to the accompanying drawings the air-conditioning system of the utility model embodiment and centrifugal chiller and frequency-converting control device thereof are described.Wherein, centrifugal chiller can comprise compressor electric motor and Oil pump electrical machinery, and wherein, the power of compressor electric motor is large, for drives impeller by low temperature low pressure gas boil down to high temperature and high pressure gas; The power of Oil pump electrical machinery is little, and the bearing that Oil pump electrical machinery is responsible for centrifugal chiller provides lubrication.
Fig. 1 is the block diagram of the frequency-converting control device for centrifugal chiller according to the utility model embodiment.As shown in Figure 1, this frequency-converting control device being used for centrifugal chiller comprises: rectification circuit 10, voltage stabilizing circuit 20, first inverter circuit 30, second inverter circuit 40, first inversion control plate 50 and the second inversion control plate 60.
Wherein, the input of rectification circuit is connected with power supply, and the first AC rectification that rectification circuit is used for power supply to provide is direct current, and rectification circuit exports direct current by DC bus; The input of voltage stabilizing circuit is connected with the output of rectification circuit, and voltage stabilizing circuit is used for carrying out filtering process to the direct current exported after rectification and keeps stable to make the voltage of DC bus.
First inverter circuit is connected with voltage stabilizing circuit, and the first inverter circuit is also connected to drive compressor electric motor with the compressor electric motor in centrifugal chiller, and the DC inverter that the first inverter circuit exports after being used for rectification is the 3rd alternating current and is supplied to compressor electric motor; The second inverter circuit be connected in parallel with the first inverter circuit, second inverter circuit is connected with voltage stabilizing circuit, first inverter circuit is also connected to drive Oil pump electrical machinery with the Oil pump electrical machinery in centrifugal chiller, and the DC inverter that the second inverter circuit exports after being used for rectification is the 3rd alternating current and is supplied to Oil pump electrical machinery.
It should be understood that, first inverter circuit and the second inverter circuit are powered in the mode of general DC busbar, namely say that the first inverter circuit and the second inverter circuit can from same DC bus power takings, thus compare from different DC bus power takings respectively with Oil pump electrical machinery with compressor electric motor in correlation technique, the utility model embodiment can reduce repeat circuit and wiring, reduce unit volume and complexity, simplified structure.
First inversion control plate is for controlling the first inverter circuit, and the first inversion control plate also for monitoring the power supply state of power supply, and controls the first inverter circuit and runs in retarding mode compressor electric motor is braked when power supply is in off-position; Second inversion control plate is for controlling the second inverter circuit, and the second inversion control plate also utilizes compressor electric motor brake the electric energy of generation and continue to run in the normal mode to think that centrifugal chiller provides lubricating oil for controlling the second inverter circuit when power supply is in off-position.
Specifically, take power supply as three-phase alternating-current supply be example, after centrifugal chiller powers on, the first inversion control plate detects by voltage detection unit the three-phase voltage that power supply is supplied to rectification circuit, and judges the power supply state of power supply according to this three-phase voltage.
If judge that power supply is in "on" position; then the first inversion control plate controls the first inverter circuit and runs in the normal mode; simultaneously the second inversion control plate controls the second inverter circuit and runs in the normal mode; run in the normal mode and can refer to the first control oil pump electric motor starting of the second inversion control plate when starting; and the first inversion control plate controls compressor electric motor startup again after oil pressure is stable; and when shutting down; first inversion control plate first controls compressor electric motor and shuts down, and at compressor electric motor rear second inversion control plate control oil pump motor stopping more out of service.In addition, in running, first inversion control plate also detects the three-phase current of compressor electric motor by current transformer, and give the first inverter circuit to control compressor electric motor stable operation by the first inverter circuit according to the three-phase current output pwm signal of compressor electric motor, and, second inversion control plate also detects the three-phase current of Oil pump electrical machinery by current transformer, and gives the second inverter circuit to be run by the second inverter circuit control oil pump motor stabilizing according to the three-phase current output pwm signal of Oil pump electrical machinery.
If judge that power supply is in off-position, then the first inversion control plate controls the first inverter circuit and runs until compressor electric motor is out of service in retarding mode, in the braking mode, compressor electric motor be in generating state and feedback power to DC bus, simultaneously the second inversion control plate controls the second inverter circuit and continues to run in the normal mode, and the second inverter circuit will utilize the voltage of DC bus to continue to run.Further, in braking procedure, the first inversion control plate also can the voltage of Real-Time Monitoring DC bus, and brake according to the voltage control compressor electric motor of DC bus, to make the voltage of DC bus in normal allowed band.
Thus, the frequency-converting control device for centrifugal chiller that the utility model embodiment proposes, the first inverter circuit and the second inverter circuit share rectification circuit and voltage stabilizing circuit, thus reduce repeat circuit, reduction means volume and complexity, and the first inversion control plate controls the first inverter circuit to be run in retarding mode to make compressor electric motor brake when power supply is in off-position, controlling electric energy second inverter circuit that second inversion control plate utilizes when power supply is in off-position compressor electric motor to brake and produces continues to run in the normal mode to think that centrifugal chiller provides lubricating oil, thus when running into situation about having a power failure suddenly, can brake the power generating ratio time by compressor electric motor, support the operation of Oil pump electrical machinery with the electric energy that braking produces simultaneously, guarantee that before compressor electric motor stops oil pump provides reliable and stable oil pressure poor, reduce brake resistance, and avoid energy dissipation.
It should be understood that DC bus-bar voltage can be converted to predeterminated voltage from DC bus power taking by the first inversion control plate, to obtain the supply power voltage needed for the first inversion control plate self work; In like manner, DC bus-bar voltage also can be converted to predeterminated voltage from DC bus power taking by the second inversion control plate, to obtain the supply power voltage needed for the second inversion control plate self work.
Further, according to an embodiment of the present utility model, as shown in Figures 2 and 3, the second inversion control plate can carry out with the first inversion control plate the power supply state communicating to obtain power supply.That is, the first inversion control plate can carry out communicating with the second inversion control plate and the power supply state of supply power voltage be sent to the second inversion control plate.
In addition, the first inversion control plate also can the running status of monitoring compressor motor, and the running status of compressor electric motor is sent to the second inversion control plate, and the second inversion control plate can be out of service at compressor electric motor rear control oil pump motor out of service.
Further, as shown in Figure 2, frequency-converting control device for centrifugal chiller also can comprise: pressure detection circuit, pressure detection circuit is for detecting the bearing pressure of centrifugal chiller, wherein, the second inversion control plate is used for controlling the second inverter circuit with the frequency of control oil pump motor according to bearing pressure.
Specifically, pressure detection circuit can detect the bearing pressure of centrifugal chiller in real time, second inversion control plate can judge bearing pressure after acquisition bearing pressure, when judging that bearing pressure is less than preset pressure, the second inversion control plate improves the frequency of Oil pump electrical machinery to the pwm signal adjustment outputting to the second inverter circuit; When judging that bearing pressure is greater than preset pressure, the second inversion control plate reduces the frequency of Oil pump electrical machinery to the pwm signal adjustment outputting to the second inverter circuit.
According to an embodiment of the present utility model, as shown in Figure 3, rectification circuit can have the first output and the second output, and voltage stabilizing circuit comprises: the first switch, charging resistor, storage capacitor and grading resistor.
Wherein, the first switch and charging resistor are connected in parallel, and the first switch in parallel is connected with the first output of rectification circuit with one end of charging resistor, and the first switch is closed or disconnection under the control of the first inversion control plate; One end of storage capacitor is connected with the other end of charging resistor with the first switch of parallel connection, and the other end of storage capacitor is connected with the second output of rectification circuit; Grading resistor and storage capacitor are connected in parallel.
More specifically, the first switch can be relay switch.
Specifically, when frequency-converting control device switches on power, the first switch is in off-state, and power supply is charged to storage capacitor by charging resistor, to limit the charging current of powered on moment, avoids excessive charging current to damage rectification circuit.Afterwards, when DC bus-bar voltage is greater than default busbar voltage, it is closed with by charging resistor short circuit that the first inversion control plate controls the first switch.
In addition, when power supply is in off-position, the electrical energy discharge of storage also can think that the second inverter circuit is powered to the second inverter circuit by storage capacitor, further, when the first inversion control plate controls compressor braking, the electric energy that compressor electric motor braking produces also can be stored to storage capacitor.
According to an embodiment of the present utility model, as shown in Figure 3, rectification circuit comprises rectifier bridge, and rectifier bridge comprises the first to the 6th diode D1-D6.Wherein, the physical circuit of the first to the 6th diode D1-D6 connects as shown in Figure 3, repeats no more here.
According to an embodiment of the present utility model, as shown in Figure 3, the first inverter circuit comprises the first inverter bridge, and the first inverter bridge comprises the first to the 6th power switch pipe Q1-Q6.Wherein, the physical circuit of the first to the 6th power switch pipe Q1-Q6 connects as shown in Figure 3, repeats no more here.
According to an embodiment of the present utility model, as shown in Figure 3, the second inverter circuit comprises the second inverter bridge, and the second inverter bridge comprises the 7th to the 12 power switch pipe Q7-Q12.Wherein, the physical circuit of the 7th to the 12 power switch pipe Q7-Q12 connects as shown in Figure 3, repeats no more here.
In addition, the utility model embodiment also proposed a kind of centrifugal chiller.
The centrifugal chiller of the utility model embodiment comprises: compressor electric motor M1 and Oil pump electrical machinery M1; The frequency-converting control device for centrifugal chiller of above-described embodiment, for the frequency-converting control device of centrifugal chiller for controlling compressor electric motor and Oil pump electrical machinery.
According to the centrifugal chiller that the utility model embodiment proposes, by the above-mentioned frequency-converting control device for centrifugal chiller, can repeat circuit be reduced, reduce unit volume and complexity; And when running into situation about having a power failure suddenly; can brake the power generating ratio time by compressor electric motor; support the operation of Oil pump electrical machinery with the electric energy that braking produces simultaneously; guarantee that before compressor electric motor stops oil pump provides reliable and stable oil pressure poor; reduce brake resistance, and avoid energy dissipation.
Finally, the utility model embodiment also been proposed a kind of air-conditioning system.
The air-conditioning system of the utility model embodiment comprises the centrifugal chiller of above-described embodiment.
According to the air-conditioning system that the utility model embodiment proposes, by the above-mentioned frequency-converting control device for centrifugal chiller, can repeat circuit be reduced, reduce unit volume and complexity; And when running into situation about having a power failure suddenly; can brake the power generating ratio time by compressor electric motor; support the operation of Oil pump electrical machinery with the electric energy that braking produces simultaneously; guarantee that before compressor electric motor stops oil pump provides reliable and stable oil pressure poor; reduce brake resistance, and avoid energy dissipation.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (10)
1. for a frequency-converting control device for centrifugal chiller, it is characterized in that, comprising:
Rectification circuit, the input of described rectification circuit is connected with power supply;
Voltage stabilizing circuit, described voltage stabilizing circuit is connected with the output of described rectification circuit;
First inverter circuit, described first inverter circuit is connected with described voltage stabilizing circuit, and described first inverter circuit is also connected to drive described compressor electric motor with the compressor electric motor in described centrifugal chiller;
The second inverter circuit be connected in parallel with described first inverter circuit, described second inverter circuit is connected with described voltage stabilizing circuit, and described first inverter circuit is also connected to drive described Oil pump electrical machinery with the Oil pump electrical machinery in described centrifugal chiller;
Control the first inversion control plate of described first inverter circuit, described first inversion control plate for monitoring the power supply state of described power supply, and controls described first inverter circuit and runs in retarding mode described compressor electric motor is braked when described power supply is in off-position;
Control the second inversion control plate of described second inverter circuit, described second inversion control plate is used for controlling described second inverter circuit when described power supply is in off-position and utilizes described compressor electric motor brake the electric energy of generation and continue to run in the normal mode to think that described centrifugal chiller provides lubricating oil.
2. according to claim 1 for the frequency-converting control device of centrifugal chiller, it is characterized in that, described second inversion control plate and described first inversion control plate carry out the power supply state communicating to obtain described power supply.
3., according to claim 1 for the frequency-converting control device of centrifugal chiller, it is characterized in that, also comprise:
Pressure detection circuit, described pressure detection circuit is for detecting the bearing pressure of described centrifugal chiller, and wherein, described second inversion control plate is used for controlling described second inverter circuit to control the frequency of described Oil pump electrical machinery according to described bearing pressure.
4. according to any one of claim 1-3 for the frequency-converting control device of centrifugal chiller, it is characterized in that, described rectification circuit has the first output and the second output, and described voltage stabilizing circuit comprises:
First switch in parallel and charging resistor, the first switch of described parallel connection is connected with the first output of described rectification circuit with one end of charging resistor, and described first switch is closed or disconnection under the control of described first inversion control plate;
Storage capacitor, one end of described storage capacitor is connected with the other end of charging resistor with the first switch of described parallel connection, and the other end of described storage capacitor is connected with the second output of described rectification circuit;
Grading resistor, described grading resistor and described storage capacitor are connected in parallel.
5. according to claim 4 for the frequency-converting control device of centrifugal chiller, it is characterized in that, described rectification circuit comprises rectifier bridge, and described rectifier bridge comprises the first to the 6th diode.
6. according to claim 4 for the frequency-converting control device of centrifugal chiller, it is characterized in that, described first inverter circuit comprises the first inverter bridge, and described first inverter bridge comprises the first to the 6th power switch pipe.
7. according to claim 4 for the frequency-converting control device of centrifugal chiller, it is characterized in that, described second inverter circuit comprises the second inverter bridge, and described second inverter bridge comprises the 7th to the 12 power switch pipe.
8. according to claim 4 for the frequency-converting control device of centrifugal chiller, it is characterized in that, described first switch is relay switch.
9. a centrifugal chiller, is characterized in that, comprising:
Compressor electric motor and Oil pump electrical machinery;
The frequency-converting control device for centrifugal chiller according to any one of claim 1-8, the described frequency-converting control device for centrifugal chiller is for controlling described compressor electric motor and described Oil pump electrical machinery.
10. an air-conditioning system, is characterized in that, comprising: want the centrifugal chiller described in 9 according to right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201521000052.5U CN205232076U (en) | 2015-12-04 | 2015-12-04 | Air conditioning system and centrifugal unit and variable frequency control device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521000052.5U CN205232076U (en) | 2015-12-04 | 2015-12-04 | Air conditioning system and centrifugal unit and variable frequency control device thereof |
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| CN205232076U true CN205232076U (en) | 2016-05-11 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092398A (en) * | 2017-12-04 | 2018-05-29 | 西安图为电气技术有限公司 | A kind of controller integrated system |
| CN110429898A (en) * | 2019-08-15 | 2019-11-08 | 海信（山东）空调有限公司 | A kind of control method of frequency conversion equipment, device and frequency conversion equipment |
| CN110594953A (en) * | 2019-09-09 | 2019-12-20 | 广东美的暖通设备有限公司 | Compressor driving device, compressor pressure protection method and air conditioner |
| CN113028580A (en) * | 2021-04-28 | 2021-06-25 | 宁波奥克斯电气股份有限公司 | Energy-saving starting control method and device for compressor, energy-saving starting device and air conditioner |
| CN114485030A (en) * | 2020-10-27 | 2022-05-13 | 海信（山东）冰箱有限公司 | Temperature control circuit, refrigeration equipment and control method |
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2015
- 2015-12-04 CN CN201521000052.5U patent/CN205232076U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108092398A (en) * | 2017-12-04 | 2018-05-29 | 西安图为电气技术有限公司 | A kind of controller integrated system |
| CN108092398B (en) * | 2017-12-04 | 2023-12-19 | 西安图为电气技术有限公司 | Controller integrated system |
| CN110429898A (en) * | 2019-08-15 | 2019-11-08 | 海信（山东）空调有限公司 | A kind of control method of frequency conversion equipment, device and frequency conversion equipment |
| CN110429898B (en) * | 2019-08-15 | 2021-11-30 | 海信（山东）空调有限公司 | Control method and device of frequency conversion equipment and frequency conversion equipment |
| CN110594953A (en) * | 2019-09-09 | 2019-12-20 | 广东美的暖通设备有限公司 | Compressor driving device, compressor pressure protection method and air conditioner |
| US11933509B2 (en) | 2019-09-09 | 2024-03-19 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Compressor driving device, compressor pressure protection method, and air conditioner |
| CN114485030A (en) * | 2020-10-27 | 2022-05-13 | 海信（山东）冰箱有限公司 | Temperature control circuit, refrigeration equipment and control method |
| CN113028580A (en) * | 2021-04-28 | 2021-06-25 | 宁波奥克斯电气股份有限公司 | Energy-saving starting control method and device for compressor, energy-saving starting device and air conditioner |
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