CN200955501Y - High-energy-efficiency rate frequency variable screw type refirgeration compressor - Google Patents
High-energy-efficiency rate frequency variable screw type refirgeration compressor Download PDFInfo
- Publication number
- CN200955501Y CN200955501Y CNU2006200426221U CN200620042622U CN200955501Y CN 200955501 Y CN200955501 Y CN 200955501Y CN U2006200426221 U CNU2006200426221 U CN U2006200426221U CN 200620042622 U CN200620042622 U CN 200620042622U CN 200955501 Y CN200955501 Y CN 200955501Y
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- compressor
- frequency conversion
- speed
- frequency
- screw rotor
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model discloses a frequency conversion screw-type refrigeration compressor that is comprised of a compressor controlling device having a frequency conversion and speed regulation function, a frequency conversion high-speed electromotor, a shell, a bearing, a driving screw rotor, and a driven screw rotor; wherein, the compressor having the frequency conversion and speed regulation function of the frequency conversion screw-type refrigeration compressor is internally provided with a PWM device that realizes the frequency conversion controlling of the frequency conversion high-speed electromotor and is connected with the frequency conversion high-speed electromotor. The compressor having the frequency conversion and speed regulation function controls the frequency conversion electromotor in a PWM controlling method to realize the sectional frequency conversion controlling and the non-sectional capacity regulation and frequency conversion dual controlling for the frequency conversion high-speed electromotor, thus the energy efficiency ratio under partial load can be effective improved to reach a best energy-saving effect. The utility model is applicable for cold medium of R134a, R407C, R404A, R410A, and R22, and the utilization temperature scope is from minus 40 DEG C to 20 DEG C.
Description
Technical field:
The utility model relates to a kind of refrigeration compressor, relates in particular to a kind of semi-closed screw type refrigerating compressor, particularly a kind of semiclosed frequency-variable screw type refrigerating compressor of high energy efficiency ratio.
Background technique:
Refrigeration compressor is absolutely necessary in refrigeration system.The compressor that is widely used at present mainly contains piston type, eddy type, screw type, centrifugal etc.
Existing screw type refrigerating compressor all adopts initiatively screw rotor rotation of motor driving, and by active screw rotor driving driven rotor, screw rotor is divided into the yin, yang rotor, the yin, yang rotor is meshing with each other, and the rotor cylindrical cooperates with housing, when the working rotor of engagement to when rotation, volume between rotor teeth groove and the housing changes, thereby realize the suction of gas, continuous gas compression circulation is finished in compression and discharge.
Early stage screw type refrigerating compressor is the fixed rotating speed working method, can't carry out energy adjustment by speed change, in the large-scale Spiral Lobe Refrigeration Compressor, can adopt the sliding valve style capacity controlling gear, but because sliding valve style capacity controlling gear complex structure, requirement machining accuracy height, the cost height, so in the conventional air-conditioning refrigeration compressor, seldom adopt, conventional air-conditioning is with in the screw type refrigerating compressor, capacity controlling gear all is not set, the screw type refrigerating compressor structure is greatly simplified, and significantly reduced manufacture cost.In order to realize the portion of energy adjusting, in the common cover refrigeration system, the compressor (being called for short the multimachine head system) of a plurality of noenergy controlling devices is set, by part shutdown method, realize the finite energy adjusting.Though after adopting the multimachine head, can realize the classification energy adjustment, increase the reliability of unit, but increased the rate of fault and the maintenance management workload of unit simultaneously, increased cost.
For this reason, the Chinese patent publication number is that CN2538982Y discloses a kind of rotary screw gas compressor, and this device comprises variable-frequency governor, variable frequency high-speed motor, housing, bearing, active screw rotor and driven screw rotor.It is by changing variable frequency high-speed motor frequency adjustment rotating speed, thereby realize overall process stepless change energy adjustment, simultaneously, motor speed can move under the power frequency supply synchronous speed, significantly improve the air displacement of screw type cold compression set, the specific refrigerating effect cost of compression set is descended, reduced unit volume.
Because frequency-variable screw type refrigerating compressor exists above-mentioned advantage, has increasing cooling machine set to bring into use the variable-frequency type refrigeration compressor at present.But the frequency-variable screw type refrigerating compressor of selling on the existing market exists motor to adopt high frequency rated designs method, does not consider the deficiency that the Energy Efficiency Ratio under the sub load promotes.
The model utility content:
The purpose of this utility model is in order to solve the technical problem of the low Energy Efficiency Ratio that occurs under the above-mentioned compressor sub load, and a kind of frequency-variable screw type refrigerating compressor is provided.
To achieve these goals, the utility model is achieved through the following technical solutions:
Frequency-variable screw type refrigerating compressor, comprise the compressor control device, variable frequency high-speed motor, seal and pressure bearing housing, bearing, active screw rotor and the driven screw rotor composition that comprise tool frequency control of motor speed function, the non-control power output end of compressor control device and the power-line terminal of variable frequency high-speed motor link to each other, the axle of variable frequency high-speed motor is connected with the active screw rotor, and initiatively screw rotor drives driven screw rotor rotation; Initiatively screw rotor and driven screw rotor are bearing in the housing by bearing; Housing is provided with suction, relief opening, in be provided be communicated with to inhale, the gas flow of relief opening; It is characterized in that: be provided with one in the compressor control device of the tool frequency control of motor speed function of described frequency-variable screw type refrigerating compressor and realize variable frequency high-speed motor VFC, the PWM device that is connected with variable frequency high-speed motor.
Described PWM device is to form full bridge inverter by thyristor and diode, connects the three phase terminals of described high-speed electric expreess locomotive respectively.
By taking the PWM control mode to control, realize variable frequency high-speed motor segmented VFC and nothing section appearance are transferred and frequency conversion pair control, the Energy Efficiency Ratio under so effectively lift portion is loaded reaches optimum energy-saving effect.
The utility model goes for R134a, R407C, R404A, R410A, R22 refrigerant, uses warm territory scope and is+20 ℃ ∽-50 ℃.
Description of drawings:
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is the structural representation of the utility model frequency-variable screw type refrigerating compressor.
Embodiment:
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
As shown in Figure 1, frequency-variable screw type refrigerating compressor is made up of the compressor control device 1 that comprises tool frequency control of motor speed function, variable frequency high-speed motor 2, housing 6, bearing 3, active screw rotor 7 and driven screw rotor 8, the terminal block (not shown) of the output termination variable frequency high-speed motor 3 of compressor control device 1, the power supply of variable frequency is provided to variable frequency high-speed motor 2, the axle of variable frequency high-speed motor 3 is connected with active screw rotor 7, and initiatively screw rotor 7 drives driven screw rotor 8 rotations; Initiatively screw rotor 7 and driven screw rotor 8 are bearing in the housing 6 by bearing 3; Active screw rotor 7 and driven screw rotor 8 be the yin, yang rotor each other, the yin, yang rotor is meshing with each other, the rotor cylindrical cooperates with housing 6, when the yin, yang rotor of engagement rotates 7 and 8, volume between rotor teeth groove and the housing 6 can change, thereby realize suction, compression and the discharge of gas, finish continuous gas compression circulation.
Be provided with one in the compressor control device 1 of the tool frequency control of motor speed function of described frequency-variable screw type refrigerating compressor and realize variable frequency high-speed motor 2 VFC, the PWM device that is connected with variable frequency high-speed motor 2.
Described PWM device is to form full bridge inverter by thyristor and diode, connects the three phase terminals of described high-speed electric expreess locomotive 2 respectively.The principle of described full bridge inverter is known by those of ordinary skill, has not just given unnecessary details at this.The model of described PWM device is MB3759.
Because variable frequency high-speed motor 2 can realize that with the compressor control device 1 that comprises tool frequency control of motor speed function output power is directly proportional with incoming frequency, so, when more than 50Hz, moving, this frequency-variable screw type refrigerating compressor still can normal reliable ground full load operation, and conventional motor and conventional frequency variator just can not directly be realized fall forward, because when 50Hz is above, the incoming frequency of common electric machine increases, the output power of motor does not increase, and the output torque reduces on the contrary, so compressor can not be operated in more than the 50Hz.
1 pair of variable frequency high-speed motor 2 of the compressor control device that comprises tool frequency control of motor speed function of this frequency-variable screw type refrigerating compressor takes the PWM control mode to control, described PWM device is realized variable frequency high-speed motor 2 segmented VFC and is not had the section appearance and transfer and the two controls of frequency conversion, so effectively the Energy Efficiency Ratio under the lift portion load reaches optimum energy-saving effect.Take the PWM control mode circuit how to constitute and how to connect as for 1 pair of variable frequency high-speed motor 2 of the compressor control device that comprises tool frequency control of motor speed function, to those skilled in the art, need not just can realize by creative work, no longer do detailed description at this.
Above-mentioned frequency-variable screw type refrigerating compressor can R134a, R407C, R404A, R410A, R22 refrigerant, uses warm territory scope and is+20 ℃ ∽-40 ℃.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1, a kind of frequency-variable screw type refrigerating compressor of high energy efficiency ratio, comprise the compressor control device, variable frequency high-speed motor, seal and pressure bearing housing, bearing, active screw rotor and the driven screw rotor composition that comprise tool frequency control of motor speed function, the non-control power output end of compressor control device and the power-line terminal of variable frequency high-speed motor link to each other, the axle of variable frequency high-speed motor is connected with the active screw rotor, and initiatively screw rotor drives driven screw rotor rotation; Initiatively screw rotor and driven screw rotor are bearing in the housing by bearing; Housing is provided with suction, relief opening, in be provided be communicated with to inhale, the gas flow of relief opening; It is characterized in that: be provided with one in the compressor control device of the tool frequency control of motor speed function of described frequency-variable screw type refrigerating compressor and realize variable frequency high-speed motor VFC, the PWM device that is connected with variable frequency high-speed motor.
2, the frequency-variable screw type refrigerating compressor of a kind of high energy efficiency ratio according to claim 1 is characterized in that: described PWM device connects the three phase terminals of described high-speed electric expreess locomotive respectively for to form full bridge inverter by thyristor and diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200426221U CN200955501Y (en) | 2006-06-09 | 2006-06-09 | High-energy-efficiency rate frequency variable screw type refirgeration compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200426221U CN200955501Y (en) | 2006-06-09 | 2006-06-09 | High-energy-efficiency rate frequency variable screw type refirgeration compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200955501Y true CN200955501Y (en) | 2007-10-03 |
Family
ID=38774086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200426221U Expired - Lifetime CN200955501Y (en) | 2006-06-09 | 2006-06-09 | High-energy-efficiency rate frequency variable screw type refirgeration compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200955501Y (en) |
-
2006
- 2006-06-09 CN CNU2006200426221U patent/CN200955501Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20071003 |
|
| EXPY | Termination of patent right or utility model |