CN107947471A - Inverter compressor motor cooling structure, control method and frequency-changeable compressor - Google Patents
Inverter compressor motor cooling structure, control method and frequency-changeable compressor Download PDFInfo
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- CN107947471A CN107947471A CN201711391642.9A CN201711391642A CN107947471A CN 107947471 A CN107947471 A CN 107947471A CN 201711391642 A CN201711391642 A CN 201711391642A CN 107947471 A CN107947471 A CN 107947471A
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- Prior art keywords
- oil
- valve
- frequency
- oil cylinder
- changeable compressor
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- 238000001816 cooling Methods 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000002826 coolant Substances 0.000 claims abstract description 29
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 9
- 238000007906 compression Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 443
- 239000002828 fuel tank Substances 0.000 claims description 18
- 230000033001 locomotion Effects 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/045—Heating; Cooling; Heat insulation of the electric motor in hermetic pumps
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with or adaptation to specific driving engines or motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
- F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
- F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops
Abstract
The present invention relates to a kind of inverter compressor motor cooling structure, control method and frequency-changeable compressor, wherein, inverter compressor motor cooling structure includes coolant flow channel, the coolant flow channel is arranged along the periphery of motor, inverter compressor motor cooling structure further includes bypass flow channel, the bypass flow channel is arranged in parallel with the coolant flow channel, and the refrigerant entered from the air entry of frequency-changeable compressor enters the compression chamber of the frequency-changeable compressor by the coolant flow channel and the bypass flow channel.The present invention can increase circulation area, in the case where ensureing motor cooling, to reduce crushing, improve efficiency in the high rotating speed big flow operation of frequency-changeable compressor.
Description
Technical field
The present invention relates to field of refrigeration, more particularly to a kind of inverter compressor motor cooling structure, control method and
Frequency-changeable compressor.
Background technology
Currently, the motor type of cooling of semi-sealed refrigerating helical-lobe compressor cools down for air inlet refrigerant, as depicted in figs. 1 and 2.
Air inlet refrigerant, by motor 1 ', cools down motor 1 ' in coolant flow channel 2 ' during rotor compression chamber is flowed to.It is right
The effect that motor 1 ' cools down is related with the flow velocity of refrigerant.Flow velocity is faster, also better (the cooling effect of motor 1 ' of cooling effect of motor 1 '
Fruit is poor, and the temperature rise of motor 1 ' can be very high, so as to can cause to burn out motor 1 '), but flow velocity is bigger, crushing is also bigger, so as to cause
The efficiency of integrating compressor reduces.So just have a equalization point here, the temperature rise of compressor efficiency and motor 1 '.
For determining frequency helical-lobe compressor, since the rotating speed of compressor is certain, the flow of compressor is certain, institute
The temperature rise of motor and efficiency, by adjusting the circulation area of coolant flow channel, can be allowed to reach a preferably balance at the beginning of design
Point.
But for inverter screw compressor, since rotating speed is change, the flow of compressor is to change, high rotating speed
Under big flow, big flow velocity can be caused, so as to cause crushing big, efficiency reduces.And under the small flow of the slow-speed of revolution, refrigerant can be caused to electricity
The cooling effect of machine is poor, the excessive risk burnt out of motor temperature rise occurs.The thus current motor type of cooling, unsuitable frequency conversion
Helical-lobe compressor.
The content of the invention
The purpose of the present invention is to propose to a kind of inverter compressor motor cooling structure, control method and frequency-changeable compressor, its
Frequency-changeable compressor can be solved under high rotating speed big flow, the problem of crushing is big, efficiency is low.
To achieve the above object, the present invention provides a kind of inverter compressor motor cooling structure, it includes coolant flow channel,
The coolant flow channel arranges that inverter compressor motor cooling structure further includes bypass flow channel, the side along the periphery of the first motor
Passage flow duct is arranged in parallel with the coolant flow channel, from the refrigerant that the air entry of frequency-changeable compressor enters by the coolant flow channel and
The bypass flow channel enters the compression chamber of the frequency-changeable compressor.
One preferably or in alternative embodiment, inverter compressor motor cooling structure includes being used to adjust the bypass flow channel
Circulation area valve.
One preferably or in alternative embodiment, inverter compressor motor cooling structure includes oil cylinder and control oil circuit, described
The rod chamber and rodless cavity of oil cylinder described in oil communication are controlled, to control the movement repeatedly of the cylinder rod of the oil cylinder, the cylinder rod
It is connected to the valve.
One preferably or in alternative embodiment, the control oil circuit includes main oil feed line, and the main oil feed line is equipped with
Main switching valve, one end of the main oil feed line connect the rodless cavity of the oil cylinder, the other end connection of the main oil feed line
The oil content barrel fuel tank of the frequency-changeable compressor.
One preferably or in alternative embodiment, the control oil circuit includes the first oil circuit, and first oil circuit is equipped with first
Switch valve, one end of first oil circuit connect the main oil feed line, and the other end of first oil circuit connects the frequency conversion
The air entry of compressor.
One preferably or in alternative embodiment, the control oil circuit includes the second oil circuit, and second oil circuit is equipped with second
Switch valve, one end of second oil circuit connect the oil cylinder, and the tie point of second oil circuit and the oil cylinder relative to
The tie point of the main oil feed line and the oil cylinder connects the frequency conversion close to the valve, the other end of second oil circuit
The air entry of compressor.
One preferably or in alternative embodiment, the control oil circuit includes two second oil circuits, along the cylinder rod
The direction of motion, has pre-determined distance between two second oil circuits and the tie point of the oil cylinder.
One preferably or in alternative embodiment, the rod chamber of the oil cylinder connects the air entry of the frequency-changeable compressor.
One preferably or in alternative embodiment, spring is equipped with the rod chamber of the oil cylinder.
One preferably or in alternative embodiment, inverter compressor motor cooling structure includes the second motor, second electricity
Machine is drivingly connected in the valve.
To achieve the above object, it is real present invention also offers a kind of one based on above-mentioned inverter compressor motor cooling structure
The control method of example is applied, according to the flow of frequency-changeable compressor, the cylinder rod by controlling oil circuit drive cylinder is moved, and then is driven for it
Valve moves, to adjust the circulation area of bypass flow channel；
The flow increase of frequency-changeable compressor, cylinder rod are moved with movable valve to the rodless cavity direction of oil cylinder, the unlatching journey of valve
Degree increase, the circulation area increase of bypass flow channel；
The flow of frequency-changeable compressor is reduced, and cylinder rod is moved with movable valve to the rod chamber direction of oil cylinder, the unlatching journey of valve
Degree reduces, and the circulation area of bypass flow channel is reduced.
One preferably or alternative embodiment in, will control oil circuit in main oil feed line one end connection oil cylinder rodless cavity,
The other end connects the oil content barrel fuel tank of frequency-changeable compressor, and sets main switching valve in main oil feed line；
Main switching valve is opened, the hydraulic oil in oil content barrel fuel tank enters the rodless cavity of oil cylinder, can make cylinder rod band movable valve
Moved to the rod chamber direction of oil cylinder, the opening degree of valve reduces, and the circulation area of bypass flow channel is reduced.
One preferably or in alternative embodiment, one end of the first oil circuit controlled in oil circuit is connected into main oil feed line, separately
One end connects the air entry of frequency-changeable compressor, and sets first switch valve in the first oil circuit；
In the case where main switching valve is opened, first switch valve is opened, the section hydraulic oil in main oil feed line enters the
One oil circuit, the pressure of oil cylinder rodless intracavitary reduce, and cylinder rod is moved with movable valve to the rodless cavity direction of oil cylinder, the unlatching journey of valve
Degree increase, the circulation area increase of bypass flow channel；
In the case where main switching valve is closed, first switch valve is opened, the hydraulic oil of oil cylinder rodless cavity passes through the first oil circuit
Outflow, the pressure of oil cylinder rodless intracavitary reduce, and cylinder rod is moved with movable valve to the rodless cavity direction of oil cylinder, the opening degree of valve
Increase, the circulation area increase of bypass flow channel.
One preferably or in alternative embodiment, one end of the second oil circuit controlled in oil circuit is connected into oil cylinder, the other end connects
The tie point of the air entry of logical frequency-changeable compressor, the second oil circuit and oil cylinder is close relative to the tie point of main oil feed line and oil cylinder
Valve, and second switch valve is set in the second oil circuit；
Frequency-changeable compressor is in the state of big flow, and main switching valve and first switch valve are all opened, and second switch valve closes
Close, the tie point of the second oil circuit and oil cylinder is located at the rod chamber of oil cylinder；
When frequency-changeable compressor changes from big flow state to small flow status, first switch valve is closed, main switching valve continues
Open, open second switch valve, the pressure increase of oil cylinder rodless intracavitary, cylinder rod is moved with movable valve to the rod chamber direction of oil cylinder
Dynamic, until the tie point of the second oil circuit and oil cylinder is positioned partially or entirely in the rodless cavity of oil cylinder, the movement of valve stops, valve
Opening degree reduces, and the circulation area of bypass flow channel is reduced.
Preferably or in alternative embodiment, two the second oil circuits are arranged in parallel one, wherein flow oil circuit in a conduct, separately
One is used as low discharge oil circuit；
Frequency-changeable compressor is in the state of middle flow, and main switching valve is opened, and first switch valve is closed, middle flow oil circuit
Second switch valve is opened, and the second switch valve of low discharge oil circuit is closed, and the tie point of middle flow oil circuit and oil cylinder is part or all of
Positioned at the rodless cavity of oil cylinder, the tie point of low discharge oil circuit and oil cylinder is located at the rod chamber of oil cylinder；
Frequency-changeable compressor therefrom flow status to low flow state change when, the second switch valve of flow oil circuit in closing,
Open the second switch valve of low discharge oil circuit, the pressure increase of oil cylinder rodless intracavitary, rod chamber of the cylinder rod with movable valve to oil cylinder
Direction is moved, until the tie point of low discharge oil circuit and oil cylinder is positioned partially or entirely in the rodless cavity of oil cylinder.
To achieve the above object, present invention also offers a kind of based on the another of above-mentioned inverter compressor motor cooling structure
The control method of embodiment, it is moved, with adjustment bypass stream according to the flow of frequency-changeable compressor by the second motor-driven valve door
The circulation area in road；
The flow increase of frequency-changeable compressor, the opening degree increase of the second motor-driven valve door, the circulating face of bypass flow channel
Product increase；
The flow of frequency-changeable compressor is reduced, and the opening degree of the second motor-driven valve door reduces, the circulating face of bypass flow channel
Product is reduced.
One preferably or in alternative embodiment, according to the rotating speed of frequency-changeable compressor and flow positive correlation, frequency-changeable compressor
Rotating speed is big, corresponding big by the opening degree of the second motor control valve；The rotating speed of frequency-changeable compressor is small, corresponding to pass through the second electricity
The opening degree of machine control valve is small.
One preferably or alternative embodiment in, under any rotating speed of frequency-changeable compressor, according to frequency-changeable compressor rotating speed with
The relation curve of optimum valve aperture, finds the corresponding optimum valve aperture of the rotating speed, and control valve is located at the position of optimal aperture
Put.
One preferably or in alternative embodiment, the acquisition of frequency-changeable compressor rotating speed and the relation curve of optimum valve aperture：
Under each rotating speed of frequency-changeable compressor, by the opening degree of the second motor constantly regulate valve, while frequency conversion pressure is tested
The efficiency of contracting machine and the temperature for detecting the first motor, until the efficiency highest of frequency-changeable compressor, while at the temperature of the first motor
In in preset range, record frequency-changeable compressor corresponding valve opening under the rotating speed, draw frequency-changeable compressor rotating speed with it is optimal
The relation curve of valve opening.
To achieve the above object, present invention also offers a kind of frequency-changeable compressor, it is included in any of the above-described embodiment
Inverter compressor motor cooling structure.
Based on above-mentioned technical proposal, the present invention at least has the advantages that：
The present invention can make the air entry entrance from frequency-changeable compressor by setting the bypass flow channel in parallel with coolant flow channel
Refrigerant enter the compression chamber of frequency-changeable compressor by coolant flow channel and bypass flow channel, in the high rotating speed big flow fortune of frequency-changeable compressor
During row, circulation area can be increased, in the case where ensureing the cooling of the first motor, to reduce crushing, improves efficiency.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the motor cooling schematic front view of prior art helical-lobe compressor；
Fig. 2 is the motor cooling schematic side view of prior art helical-lobe compressor；
Fig. 3 is the schematic cross-sectional view of an embodiment of inverter compressor motor cooling structure provided by the invention；
Fig. 4 is the external structure schematic diagram of inverter compressor motor cooling structure provided by the invention；
Fig. 5 is the schematic cross-sectional view of another embodiment of inverter compressor motor cooling structure provided by the invention；
Fig. 6 is frequency-changeable compressor rotating speed provided by the invention and the relation curve of optimum valve aperture.
Attached figure label：
1 '-motor；2 '-coolant flow channel；
The first motors of 1-；2- coolant flow channels；3- bypass flow channels；4- valves；
5- oil cylinders；51- cylinder rods；52- pistons；53- springs；
6- controls oil circuit；The main oil feed lines of 61-；62- main switching valves；The first oil circuits of 63-；64- first switch valves；65-
Two oil circuits；66- second switch valves；
7- oil content barrel fuel tanks；
8- bodies；
The second motors of 9-.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in embodiment is clearly and completely retouched
State.Obviously, described embodiment is only the part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, the every other implementation that those of ordinary skill in the art are obtained without creative efforts
Example, belongs to the scope of protection of the invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or position relationship of the instruction such as "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " is based on attached drawing institutes
The orientation or position relationship shown, is for only for ease of the description present invention and simplifies description, rather than instruction or the dress for implying meaning
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that the present invention is protected
The limitation of scope.
As shown in Figure 3, Figure 4, it is the illustrative examples of inverter compressor motor cooling structure provided by the invention, at this
In illustrative examples, inverter compressor motor cooling structure includes coolant flow channel 2, periphery of the coolant flow channel 2 along the first motor 1
Arrangement, inverter compressor motor cooling structure provided by the invention further include bypass flow channel 3, and bypass flow channel 3 and coolant flow channel 2 are simultaneously
Connection is set, and the refrigerant entered from the air entry of frequency-changeable compressor enters frequency-changeable compressor by coolant flow channel 2 and bypass flow channel 3
Compression chamber.
The present invention makes the refrigerant point entered by frequency-changeable compressor air entry by setting bypass flow channel 3 and coolant flow channel 2
Enter the compression chamber of frequency-changeable compressor by bypass flow channel 3 and coolant flow channel 2 respectively for two parts, in the high rotating speed of frequency-changeable compressor
When big flow is run, circulation area can be increased, in the case where ensureing the cooling of the first motor 1, to reduce crushing, improves energy
Effect.
As shown in figure 3, in above-described embodiment, inverter compressor motor cooling structure provided by the invention can also include using
In the valve 4 of the circulation area of adjustment bypass flow channel 3.Valve 4 can be arranged on the inlet of bypass flow channel 3, and valve 4 can move
It is dynamic, to control the circulation area of bypass flow channel 3.In the high rotating speed big flow operation of frequency-changeable compressor, it can make what valve 4 was opened
Degree increases, and increases the circulation area of refrigerant；In the small flow operation of the frequency-changeable compressor slow-speed of revolution, it can make what valve 4 was opened
Degree reduces, and reduces the circulation area of refrigerant, therefore, of the invention by setting valve 4 to be controlled the circulation area of refrigerant,
It can either ensure that the first motor 1 cools down, reduce crushing, improve efficiency, and frequency-changeable compressor can be adjusted and run at high speed and low speed
Operate the needs to 3 circulation area of bypass flow channel.
One preferably or in alternative embodiment, the opening degree of the movement of valve 4, i.e. valve 4, can use hydraulic system
It is controlled.
In above-described embodiment, hydraulic system can include oil cylinder 5 and control oil circuit 6, and control oil circuit 6 connects having for oil cylinder 5
Rod cavity and rodless cavity, with the movement repeatedly of 5 cylinder rod 51 of control cylinder, cylinder rod 51 is connected to valve 4, passes through 5 cylinder rod 51 of oil cylinder
Telescopic band movable valve 4 moves.
According to the flow of frequency-changeable compressor, the cylinder rod 51 by controlling 6 drive cylinder 5 of oil circuit is moved, and then with movable valve 4
It is mobile, to adjust the circulation area of bypass flow channel 3.
The flow increase of frequency-changeable compressor, cylinder rod 51 are moved with movable valve 4 to the rodless cavity direction of oil cylinder 5, and valve 4 is opened
Degree of leaving increases, the circulation area increase of bypass flow channel 3.
The flow of frequency-changeable compressor is reduced, and cylinder rod 51 is moved with movable valve 4 to the rod chamber direction of oil cylinder 5, and valve 4 is opened
Degree of leaving reduces, and the circulation area of bypass flow channel 3 is reduced.
In above-described embodiment, control oil circuit 6 can include main oil feed line 61, and main oil feed line 61 is equipped with main switching valve
62, the rodless cavity of one end connection oil cylinder 5 of main oil feed line 61, the oil of the other end connection frequency-changeable compressor of main oil feed line 61
Divide bucket fuel tank 7.
The other end of main oil feed line 61 is connected the oil content barrel fuel tank 7 of frequency-changeable compressor by the present invention, in frequency-changeable compressor
In operational process, it is high pressure in oil content barrel fuel tank 7, there is sufficiently large charge oil pressure, it is not necessary to which fuel tank is separately set, accordingly
Oil pump need not additionally be increased or other structures carry out oil supply pressurization, it is simple in structure.
When frequency-changeable compressor is run, the pressure in oil content barrel fuel tank 7 is high pressure, when the main switching valve 62 of main oil feed line 61
During opening, hydraulic oil in oil content barrel fuel tank 7 enters the rodless cavity of oil cylinder 5, and the piston 52 of oil cylinder 5 is to the rod chamber side of oil cylinder 5
It is mobile to (to the right, as shown in Figure 3) so that cylinder rod 52 with movable valve 4 to the rod chamber direction of oil cylinder 5 (to the right, such as Fig. 3
It is shown) it is mobile, the opening degree of valve 4 reduces, and then can reduce the circulation area of bypass flow channel 3.
In above-described embodiment, pressure is with the no necessarily relation of running speed of frequency-changeable compressor, the pressure in oil content barrel fuel tank 7
If it is related with the operating mode of air-conditioning actual motion to advocate.
In above-described embodiment, control oil circuit 6 can include the first oil circuit 63, and the first oil circuit 63 is equipped with first switch valve 64,
One end of first oil circuit 63 connects main oil feed line 61, specifically connects main oil feed line 61 and is located at main switching valve 62 and oil cylinder 5
Position between rodless cavity, the air entry of the other end connection frequency-changeable compressor of the first oil circuit 63.
First oil circuit 63 is connected the air entry of frequency-changeable compressor by the present invention, can by air-breathing refrigerant by oil cylinder 5 without bar
The oil of intracavitary carries back the exhaust end of frequency-changeable compressor, so by the oil strainer in exhaust end oil content barrel by refrigerant with it is oily into
Row separation, makes oil be returned in oil content barrel fuel tank 7, to form the interior circulation of oil.
Pressure at the air entry of frequency-changeable compressor is less than the pressure in oil content barrel fuel tank 7.
In the case that main switching valve 62 on main oil feed line 61 is opened, the first switch valve of the first oil circuit 63 is opened
64, main oil feed line 61 be passed through 5 rodless cavity of oil cylinder hydraulic oil some enter the first oil circuit 63, therefore, 5 rodless cavity of oil cylinder
Pressure reduce, the piston 52 of oil cylinder 5 can move under the pressure of 5 rod chamber of oil cylinder to the rodless cavity direction of oil cylinder 5, and then
Rodless cavity direction of the cylinder rod 51 with movable valve 4 to oil cylinder 5 can be made (to the left, as shown in Figure 3) mobile, the opening degree of valve 4
Increase, and then can increase the circulation area of bypass flow channel 3.
In the case that main switching valve 62 on main oil feed line 61 is closed, the first switch valve of the first oil circuit 63 is opened
64, not to the rodless cavity fuel feeding of oil cylinder 5, the hydraulic oil of 5 rodless cavity of oil cylinder is flowed to by the first oil circuit 63 to be become main oil feed line 61
The air entry of frequency compressor, therefore, the pressure of 5 rodless cavity of oil cylinder reduce, and the piston 52 of oil cylinder 5 can be in 5 rod chamber of oil cylinder
Under rodless cavity direction from pressure to oil cylinder 5 move, and then can make cylinder rod 51 with rodless cavity direction from movable valve 4 to oil cylinder 5 (to
A left side, as shown in Figure 3) mobile, the opening degree increase of valve 4, and then can increase the circulation area of bypass flow channel 3.
Therefore, the opening of the first switch valve 64 of the first oil circuit 63 can be such that the unlatching of valve 4 arrives at utmost, suitable for becoming
Frequency compressor is in the situation of high rotating speed big flow.
In above-described embodiment, control oil circuit 6 can include at least one the second oil circuits 65, and the second oil circuit 65 is opened equipped with second
Valve 66, one end connection oil cylinder 5 of the second oil circuit 65, and the second oil circuit 65 are closed with the tie point of oil cylinder 5 relative to main oil feed line
61 with the tie point of oil cylinder 5 close to valve 4, the air entry of the other end connection frequency-changeable compressor of the second oil circuit 65.
In above-described embodiment, adjacent two the second oil circuits 65 frequency conversion compression corresponding with the distance between the tie point of oil cylinder 5
The flow section of machine, also corresponds to the opening degree of valve 4 accordingly.
Frequency-changeable compressor is in the state of big flow, and main switching valve 62 and first switch valve 64 are all opened, second switch
Valve 66 is closed, and the tie point of the second oil circuit 65 and oil cylinder 5 is located at the rod chamber of oil cylinder 5.
When frequency-changeable compressor changes from big flow state to small flow status, first switch valve 64, main switching valve 62 are closed
Continue to open, opening second switch valve 66, the pressure increase in 5 rodless cavity of oil cylinder, the having to oil cylinder 5 with movable valve 4 of cylinder rod 51
Rod cavity direction is moved, until the tie point of the second oil circuit 65 and oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5, valve 4
Movement stops, and the opening degree of valve 4 reduces, and the circulation area of bypass flow channel 3 is reduced.
Frequency-changeable compressor is in the state of small flow, and main switching valve 62 and second switch valve 66 are all opened, first switch
Valve 64 is closed, and the tie point of the second oil circuit 65 and oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5.
When frequency-changeable compressor changes from small flow status to big flow state, first switch valve 64, main switching valve 62 are opened
Continue to open, closing second switch valve 66, the pressure in 5 rodless cavity of oil cylinder reduces, nothing of the cylinder rod 51 with movable valve 4 to oil cylinder 5
Rod cavity direction is moved, until the tie point of the second oil circuit 65 and oil cylinder 5 is located at the rod chamber of oil cylinder 5, the movement of valve 4 stops,
The opening degree increase of valve 4, the circulation area increase of bypass flow channel 3.
In above-described embodiment, control oil circuit 6 can include two the second oil circuits 65, along the direction of motion of cylinder rod 51, two
There is pre-determined distance between second oil circuit 65 and the tie point of oil cylinder 5.Two the second oil circuit 65 is arranged in parallel, wherein a conduct
Middle flow oil circuit, another is used as low discharge oil circuit.
Frequency-changeable compressor is in the state of middle flow, and main switching valve 62 is opened, and first switch valve 64 is closed, middle flow oil
The second switch valve 66 on road is opened, and the second switch valve 66 of low discharge oil circuit is closed, the tie point portion of middle flow oil circuit and oil cylinder 5
Point or be entirely located in the rodless cavity of oil cylinder 5, the tie point of low discharge oil circuit and oil cylinder 5 is located at the rod chamber of oil cylinder 5.
Frequency-changeable compressor therefrom flow status to low flow state change when, the second switch valve of flow oil circuit in closing
66, the second switch valve 66 of low discharge oil circuit is opened, the pressure increase in 5 rodless cavity of oil cylinder, cylinder rod 51 is with movable valve 4 to oil cylinder
5 rod chamber direction movement, until the tie point of middle flow oil circuit and oil cylinder 5 be located at the rodless cavity of oil cylinder 5, low discharge oil circuit and
The tie point of oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5.
Frequency-changeable compressor is in the state of low discharge, and main switching valve 62 is opened, and first switch valve 64 is closed, middle flow oil
The second switch valve 66 on road is closed, and the second switch valve 66 of low discharge oil circuit is opened, the tie point position of middle flow oil circuit and oil cylinder 5
In the rodless cavity of oil cylinder 5, the tie point of low discharge oil circuit and oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5.
When frequency-changeable compressor changes from low flow state to middle flow status, the second switch valve of flow oil circuit in opening
66, the second switch valve 66 of low discharge oil circuit is closed, the pressure in 5 rodless cavity of oil cylinder reduces, and cylinder rod 51 is with movable valve 4 to oil cylinder
5 rodless cavity direction movement, until the tie point of low discharge oil circuit and oil cylinder 5 be located at the rod chamber of oil cylinder 5, middle flow oil circuit and
The tie point of oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5.
On the basis of above-mentioned each embodiment, the rod chamber of oil cylinder 5 can connect frequency-changeable compressor air entry or its
He controls oil circuit.Pressure at the air entry of frequency-changeable compressor is less than the pressure in oil content barrel fuel tank 7.
On the basis of above-mentioned each embodiment, in order to allow valve 4 to be moved to the rodless cavity direction of oil cylinder 5, oil cylinder 5
Spring 53 can be equipped with rod chamber.When main oil feed line 61 is closed, the restoring force of spring 53 can allow valve 4 to oil cylinder 5
Rodless cavity direction movement.
It is main since the flow of refrigerant can be smaller when frequency-changeable compressor is in extremely low speed operation under a particular case
The main switching valve 62 of oil feed line 61 is opened, and the second switch valve 66 of low discharge oil circuit is opened, at this point it is possible to block valve 4
Bypass flow channel 3, at this moment, all refrigerants will be used for the cooling of the first motor 1, otherwise can cause 1 temperature mistake of the first motor
It is high.
In still another particular case, when frequency-changeable compressor is in hypervelocity operation, since the flow of refrigerant can be bigger,
At this moment if when refrigerant is all flowed through from coolant flow channel 2, the flow velocity that may result at this is very big, so as to cause crushing big, becomes
Frequency compressor efficiency reduces；At this time, it is the valve 4 of bypass flow channel 3 is fully open, refrigerant as much as possible is allowed from bypass flow channel 3
Directly flow through, therefore, it is possible to reduce crushing to the full extent, improve frequency-changeable compressor efficiency.
In conclusion by the control to 3 circulation area of bypass flow channel, frequency-changeable compressor can be effectively improved in high rotating speed
Under efficiency, while be also possible to prevent occur the excessive situation of 1 temperature of the first motor in the slow-speed of revolution.
By controlling adjustment to the refrigerant circulation area of different rotating speeds down coversion compressor, ensureing 1 temperature rise of the first motor
In the case of good, realize that frequency-changeable compressor efficiency maximizes.
As shown in figure 3, in one embodiment, control oil circuit 6 includes main oil feed line 61, the first oil circuit 63 and two
Second oil circuit 65.Wherein, the first oil circuit 63 and two the second oil circuits 65 are respectively defined as high flow capacity oil circuit, middle flow oil circuit and low
Flow oil circuit.Wherein, the main oil feed line 61 of high flow capacity oil communication, the position of low discharge oil communication oil cylinder 5 is relative to middle stream
Amount oil communication oil cylinder 5 is located proximate to valve 4, and middle flow oil circuit is between high flow capacity oil circuit and low discharge oil circuit, control
The stop position of the piston 52 of oil cylinder 5, is also equivalent to control the position of valve 4.
When the switch valve of these oil circuits is opened, valve 4 is just parked in corresponding position, passes through the stroke control valve of oil cylinder 5
The opening degree of door 4, adjusts the circulation area of bypass flow channel 3.
Such as：When the position of secondary piston 52 is in the position of high flow capacity oil circuit, this state, the main switch of main oil feed line 61
The first switch valve 64 of valve 62 and high flow capacity oil circuit is open mode.
When piston 52 controls middle flow oil circuit position, it is necessary to the first switch valve 64 of high flow capacity oil circuit be turned off, then
The second switch valve 66 of flow oil circuit in opening, at this moment, has oil to pass through main oil feed line 61, flows into oil cylinder from oil content barrel fuel tank 7
5, the rod chamber direction (the right) of piston 52 to oil cylinder 5 is mobile, until the position of flow oil circuit in the arrival of piston 52.Flowed in arrival
Behind the position of gauging road, since middle flow oil circuit is connected with the suction end of frequency-changeable compressor, cause pressure low, thus piston 52 will not
It is mobile to the rod chamber direction (to the right) of oil cylinder 5 again.
Similarly, in this way it is possible to piston 52 is transferred to the position of low discharge oil circuit.
It is similar, if current location is low discharge oil circuit position, at this moment the second switch valve 66 of middle flow oil circuit is opened,
The second switch valve 66 of low discharge oil circuit is turned off, the suction end connection due to oil cylinder 5 by middle flow oil circuit with frequency-changeable compressor,
Pressure is low, so, under the action of 53 restoring force of spring, piston 52 is moved to the left, until flow oil circuit position in arrival.
In above-mentioned each embodiment, main switching valve 62, first switch valve 64 and second switch valve 66 can be solenoid valve.
As shown in figure 4, alternatively, coolant flow channel 2 and bypass flow channel 3 can be arranged on body 8, and bypass flow channel 3 can be set
The outer shroud in coolant flow channel 2 is put, whole bypass flow channel 3 can be divided into four parts, and the coolant flow channel 2 set with point four parts is one by one
It is corresponding, and be parallel relationship with coolant flow channel 2.
Present invention also offers a kind of controlling party based on an above-mentioned inverter compressor motor cooling structure wherein embodiment
Method, according to the flow of frequency-changeable compressor, the cylinder rod 51 by controlling 6 drive cylinder 5 of oil circuit is moved, and then is moved with movable valve 4 for it
It is dynamic, to adjust the circulation area of bypass flow channel 3.
The flow increase of frequency-changeable compressor, cylinder rod 51 are moved with movable valve 4 to the rodless cavity direction of oil cylinder 5, and valve 4 is opened
Degree of leaving increases, the circulation area increase of bypass flow channel 3.
The flow of frequency-changeable compressor is reduced, and cylinder rod 51 is moved with movable valve 4 to the rod chamber direction of oil cylinder 5, and valve 4 is opened
Degree of leaving reduces, and the circulation area of bypass flow channel 3 is reduced.
It is another by the rodless cavity of 61 one end of the main oil feed line connection oil cylinder 5 controlled in oil circuit 6 in above-mentioned control method
The oil content barrel fuel tank 7 of end connection frequency-changeable compressor, and main switching valve 62 is set in main oil feed line 61.
Main switching valve 62 is opened, the hydraulic oil in oil content barrel fuel tank 7 enters the rodless cavity of oil cylinder 5, can make 51 band of cylinder rod
Movable valve 4 is moved to the rod chamber direction of oil cylinder 5, and the opening degree of valve 4 reduces, and the circulation area of bypass flow channel 3 is reduced.
In above-mentioned control method, one end of the first oil circuit 63 controlled in oil circuit 6 is connected into main oil feed line 61, the other end
The air entry of frequency-changeable compressor is connected, and first switch valve 64 is set in the first oil circuit 63.
In the case where main switching valve 62 is opened, first switch valve 64 is opened, the section hydraulic oil in main oil feed line 61
Into the first oil circuit 63, the pressure in 5 rodless cavity of oil cylinder reduces, and cylinder rod 51 is moved with movable valve 4 to the rodless cavity direction of oil cylinder 5
It is dynamic, the opening degree increase of valve 4, the circulation area increase of bypass flow channel 3.
In the case where main switching valve 62 is closed, first switch valve 64 is opened, the hydraulic oil of 5 rodless cavity of oil cylinder passes through first
Oil circuit 63 flows out, and the pressure in 5 rodless cavity of oil cylinder reduces, and cylinder rod 51 is moved with movable valve 4 to the rodless cavity direction of oil cylinder 5, valve
The opening degree increase of door 4, the circulation area increase of bypass flow channel 3.
In above-mentioned control method, one end of the second oil circuit 65 controlled in oil circuit 6 is connected into oil cylinder 5, other end connection becomes
The air entry of frequency compressor, the tie point of the second oil circuit 65 and oil cylinder 5 are leaned on relative to the tie point of main oil feed line 61 and oil cylinder 5
Nearly valve 4, and second switch valve 66 is set in the second oil circuit 65.
Frequency-changeable compressor is in the state of big flow, and main switching valve 62 and first switch valve 64 are all opened, second switch
Valve 66 is closed, and the tie point of the second oil circuit 65 and oil cylinder 5 is located at the rod chamber of oil cylinder 5.
When frequency-changeable compressor changes from big flow state to small flow status, first switch valve 64, main switching valve 62 are closed
Continue to open, opening second switch valve 66, the pressure increase in 5 rodless cavity of oil cylinder, the having to oil cylinder 5 with movable valve 4 of cylinder rod 51
Rod cavity direction is moved, until the tie point of the second oil circuit 65 and oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5, valve 4
Movement stops, and the opening degree of valve 4 reduces, and the circulation area of bypass flow channel 3 is reduced.
In above-mentioned control method, two the second oil circuits 65 are arranged in parallel, wherein flow oil circuit in a conduct, another work
For low discharge oil circuit.
Frequency-changeable compressor is in the state of middle flow, and main switching valve 62 is opened, and first switch valve 64 is closed, middle flow oil
The second switch valve 66 on road is opened, and the second switch valve 66 of low discharge oil circuit is closed, the tie point portion of middle flow oil circuit and oil cylinder 5
Point or be entirely located in the rodless cavity of oil cylinder 5, the tie point of low discharge oil circuit and oil cylinder 5 is located at the rod chamber of oil cylinder 5.
Frequency-changeable compressor therefrom flow status to low flow state change when, the second switch valve of flow oil circuit in closing
66, the second switch valve 66 of low discharge oil circuit is opened, the pressure increase in 5 rodless cavity of oil cylinder, cylinder rod 51 is with movable valve 4 to oil cylinder
5 rod chamber direction movement, until the tie point of low discharge oil circuit and oil cylinder 5 is positioned partially or entirely in the rodless cavity of oil cylinder 5.
In above-described embodiment, the second oil circuit 65 is positioned partially or entirely in the rod chamber of oil cylinder 5 or without bar with 5 tie point of oil cylinder
Chamber, that is, represent that the second oil circuit 65 is partly or entirely connected with the rod chamber or rodless cavity of oil cylinder 5.
Above-described embodiment controls the circulation area of bypass flow channel 3 by the opening degree of regulation of hydraulic system valve 4, with
Realize the cooling of the first motor 1 and a balance of frequency-changeable compressor efficiency.Its control method used is by frequency-changeable compressor
Rotating speed be divided into high, medium and low three grades, pass through the cooperation break-make of each switch valve, control valve 4 position (open journey
Degree).
Another preferred or alternative embodiment of 4 opening degree of control valve is set forth below, in this embodiment, such as Fig. 5 institutes
Show, inverter compressor motor cooling structure includes the second motor 9, and the second motor 9 is drivingly connected in valve 4, to drive valve 4 to move
It is dynamic.That is the opening degree of valve 4, can be controlled using the second motor 9.The present embodiment is using the second motor 9 driving valve 4
The method of opening degree is not limited to the rotating speed of frequency-changeable compressor being divided into high, medium and low three grades, it can be compressed in frequency conversion
The opening degree of valve 4 is adjusted under any rotating speed of machine, it is specific as follows.
The control method of the present embodiment inverter compressor motor cooling structure is：
According to the flow of frequency-changeable compressor, valve 4 is driven to move by the second motor 9, to adjust the circulation of bypass flow channel 3
Area；
The flow increase of frequency-changeable compressor, the opening degree increase of the second motor 9 driving valve 4, the circulation of bypass flow channel 3
Area increases；
The flow of frequency-changeable compressor is reduced, and the opening degree of the second motor 9 driving valve 4 reduces, the circulation of bypass flow channel 3
Area is reduced.
According to the rotating speed of frequency-changeable compressor and flow positive correlation, the rotating speed of frequency-changeable compressor is big, and correspondence passes through the second motor 9
The opening degree of control valve 4 is big；The rotating speed of frequency-changeable compressor is small, the corresponding opening degree by 9 control valve 4 of the second motor
It is small.
The present embodiment by the opening degree of 9 control valve 4 of the second motor, can make the circulation area of bypass flow channel 3 with
The rotating speed of frequency-changeable compressor is precisely matched, and is not limited to the rotating speed of frequency-changeable compressor being divided into high, medium and low three grades,
So as to fulfill the maximization of frequency-changeable compressor efficiency.
Alternatively, can be according to frequency-changeable compressor rotating speed and optimum valve aperture under any rotating speed of frequency-changeable compressor
Relation curve (as shown in Figure 6), find the corresponding optimum valve aperture of the rotating speed, optimal aperture be located at control valve 4
Position, to ensure, in the case where the first motor 1 cools down well, to reduce crushing to greatest extent, improves compressor efficiency.
Above by frequency-changeable compressor rotating speed frequency-changeable compressor can be precisely matched with the relation curve of optimum valve aperture
The circulation area of bypass flow channel 3 under every speed, to realize frequency-changeable compressor in every speed, can ensure the first electricity
In the case that machine 1 cools down well, crushing is reduced to greatest extent, realizes that compressor efficiency maximizes.
Frequency-changeable compressor rotating speed and the preparation method of the relation curve of optimum valve aperture are in the present embodiment：In frequency conversion pressure
In contracting machine operational process, under each rotating speed of frequency-changeable compressor, pass through the unlatching journey of 9 constantly regulate valve 4 of the second motor
Degree, due to the change of valve opening, the efficiency of compressor can also change, constantly regulate valve opening, while test frequency conversion compression
The efficiency of machine and the temperature for detecting the first motor 1, until the efficiency highest of frequency-changeable compressor, while at the temperature of the first motor 1
In (cooling effect of the first motor 1 is good) in preset range, frequency-changeable compressor corresponding valve under the rotating speed is at this moment recorded
Aperture, valve opening at this time is optimum valve aperture, draws frequency-changeable compressor rotating speed and the relation curve of optimum valve aperture.
The present embodiment is by the opening degree of 9 control valve 4 of the second motor, to control the circulation area of bypass flow channel 3；And
, can be precisely according to the adjustment of rotational speed valve of frequency-changeable compressor by frequency-changeable compressor rotating speed and the relation curve of optimum valve aperture
The aperture of door 4, so as to make frequency-changeable compressor at each speed, and under conditions of ensureing that the first motor 1 cools down well,
Realize the maximization of frequency-changeable compressor efficiency.
Present invention also offers a kind of frequency-changeable compressor, the inverter compressor motor that it is included in any of the above-described embodiment is cold
But structure.
In the description of the present invention, it is to be understood that limit parts using the word such as " first ", " second ", only
It is for only for ease of and above-mentioned parts is distinguished, does not such as have Stated otherwise, above-mentioned word does not have particular meaning, therefore not
It is understood that as limiting the scope of the invention.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the embodiment of the present invention or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution, it should all cover among the claimed technical solution scope of the present invention.
Claims (20)
1. a kind of inverter compressor motor cooling structure, including coolant flow channel (2), the coolant flow channel (2) is along the first motor (1)
Periphery arrangement, it is characterised in that：Bypass flow channel (3) is further included, the bypass flow channel (3) is in parallel with the coolant flow channel (2)
Set, the refrigerant entered from the air entry of frequency-changeable compressor enters institute by the coolant flow channel (2) and the bypass flow channel (3)
State the compression chamber of frequency-changeable compressor.
2. inverter compressor motor cooling structure as claimed in claim 1, it is characterised in that：Including for adjusting the bypass
The valve (4) of the circulation area of runner (3).
3. inverter compressor motor cooling structure as claimed in claim 2, it is characterised in that：Including oil cylinder (5) and control oil
Road (6), the control oil circuit (6) connects the rod chamber and rodless cavity of the oil cylinder (5), to control the cylinder rod of the oil cylinder (5)
(51) movement repeatedly, the cylinder rod (51) are connected to the valve (4).
4. inverter compressor motor cooling structure as claimed in claim 3, it is characterised in that：The control oil circuit (6) includes
Main oil feed line (61), the main oil feed line (61) are equipped with main switching valve (62), and one end of the main oil feed line (61) connects
Lead to the rodless cavity of the oil cylinder (5), the other end of the main oil feed line (61) connects the oil content barrel oil of the frequency-changeable compressor
Case (7).
5. inverter compressor motor cooling structure as claimed in claim 4, it is characterised in that：The control oil circuit (6) includes
First oil circuit (63), first oil circuit (63) are equipped with first switch valve (64), one end connection institute of first oil circuit (63)
Main oil feed line (61) is stated, the other end of first oil circuit (63) connects the air entry of the frequency-changeable compressor.
6. inverter compressor motor cooling structure as claimed in claim 4, it is characterised in that：The control oil circuit (6) includes
Second oil circuit (65), second oil circuit (65) are equipped with second switch valve (66), one end connection institute of second oil circuit (65)
Oil cylinder (5) is stated, and the tie point of second oil circuit (65) and the oil cylinder (5) is relative to the main oil feed line (61) and institute
The tie point for stating oil cylinder (5) connects the frequency-changeable compressor close to the valve (4), the other end of second oil circuit (65)
Air entry.
7. inverter compressor motor cooling structure as claimed in claim 6, it is characterised in that：The control oil circuit (6) includes
Two second oil circuits (65), along the direction of motion of the cylinder rod (51), two second oil circuits (65) and the oil cylinder
(5) there is pre-determined distance between tie point.
8. inverter compressor motor cooling structure as claimed in claim 3, it is characterised in that：The rod chamber of the oil cylinder (5)
Connect the air entry of the frequency-changeable compressor.
9. inverter compressor motor cooling structure as claimed in claim 3, it is characterised in that：The rod chamber of the oil cylinder (5)
It is interior to be equipped with spring (53).
10. inverter compressor motor cooling structure as claimed in claim 2, it is characterised in that：Including the second motor (9), institute
The second motor (9) is stated to be drivingly connected in the valve (4).
A kind of 11. control method of inverter compressor motor cooling structure as claimed in claim 3, it is characterised in that：
According to the flow of frequency-changeable compressor, the cylinder rod (51) by controlling oil circuit (6) drive cylinder (5) is moved, and then drives valve
Door (4) is mobile, to adjust the circulation area of bypass flow channel (3)；
The flow increase of frequency-changeable compressor, cylinder rod (51) are moved with movable valve (4) to the rodless cavity direction of oil cylinder (5), valve (4)
Opening degree increase, bypass flow channel (3) circulation area increase；
The flow of frequency-changeable compressor is reduced, and cylinder rod (51) is moved with movable valve (4) to the rod chamber direction of oil cylinder (5), valve (4)
Opening degree reduce, the circulation area of bypass flow channel (3) is reduced.
12. the control method of inverter compressor motor cooling structure as claimed in claim 11, it is characterised in that：Will control oil
The rodless cavity of main oil feed line (61) one end connection oil cylinder (5) in road (6), the oil content barrel oil of other end connection frequency-changeable compressor
Case (7), and main switching valve (62) is set in main oil feed line (61)；
Main switching valve (62) is opened, the hydraulic oil in oil content barrel fuel tank (7) enters the rodless cavity of oil cylinder (5), can make cylinder rod
(51) moved with movable valve (4) to the rod chamber direction of oil cylinder (5), the opening degree of valve (4) reduces, bypass flow channel (3)
Circulation area is reduced.
13. the control method of inverter compressor motor cooling structure as claimed in claim 12, it is characterised in that：Will control oil
One end of the first oil circuit (63) in road (6) connects main oil feed line (61), and the other end connects the air entry of frequency-changeable compressor, and
In the first oil circuit (63), first switch valve (64) is set；
In the case where main switching valve (62) is opened, first switch valve (64) is opened, the section hydraulic in main oil feed line (61)
Oil enters the first oil circuit (63), the pressure reduction in oil cylinder (5) rodless cavity, nothing of the cylinder rod (51) with movable valve (4) to oil cylinder (5)
Rod cavity direction is moved, the opening degree increase of valve (4), the circulation area increase of bypass flow channel (3)；
In the case where main switching valve (62) is closed, first switch valve (64) is opened, the hydraulic oil of oil cylinder (5) rodless cavity passes through the
One oil circuit (63) flows out, and the pressure in oil cylinder (5) rodless cavity reduces, rodless cavity of the cylinder rod (51) with movable valve (4) to oil cylinder (5)
Direction is moved, the opening degree increase of valve (4), the circulation area increase of bypass flow channel (3).
14. the control method of inverter compressor motor cooling structure as claimed in claim 13, it is characterised in that：Will control oil
One end connection oil cylinder (5) of the second oil circuit (65) in road (6), the other end connect the air entry of frequency-changeable compressor, the second oil circuit
(65) with the tie point of oil cylinder (5) relative to the tie point of main oil feed line (61) and oil cylinder (5) close to valve (4), and the
Two oil circuits (65) set second switch valve (66)；
Frequency-changeable compressor is in the state of big flow, and main switching valve (62) and first switch valve (64) are all opened, second switch
Valve (66) is closed, and the tie point of the second oil circuit (65) and oil cylinder (5) is located at the rod chamber of oil cylinder (5)；
When frequency-changeable compressor changes from big flow state to small flow status, first switch valve (64), main switching valve (62) are closed
Continue to open, open second switch valve (66), the pressure increase in oil cylinder (5) rodless cavity, cylinder rod (51) band movable valve (4) is to oil
The rod chamber direction movement of cylinder (5), until the second oil circuit (65) and the tie point of oil cylinder (5) are positioned partially or entirely in oil cylinder (5)
Rodless cavity, the movement of valve (4) stops, and the opening degree of valve (4) reduces, and the circulation area of bypass flow channel 3 is reduced.
15. the control method of inverter compressor motor cooling structure as claimed in claim 14, it is characterised in that：It is arranged in parallel
Two the second oil circuits (65), wherein flow oil circuit in a conduct, another is used as low discharge oil circuit；
Frequency-changeable compressor is in the state of middle flow, and main switching valve (62) is opened, and first switch valve (64) is closed, middle flow oil
The second switch valve (66) on road is opened, and the second switch valve (66) of low discharge oil circuit is closed, the company of middle flow oil circuit and oil cylinder (5)
Contact portions or the rodless cavity for being entirely located in oil cylinder (5), low discharge oil circuit and the tie point of oil cylinder (5) are located at having for oil cylinder (5)
Rod cavity；
Frequency-changeable compressor therefrom flow status to low flow state change when, the second switch valve (66) of flow oil circuit in closing,
The second switch valve (66) of low discharge oil circuit is opened, the pressure increase in oil cylinder (5) rodless cavity, cylinder rod (51) band movable valve (4)
Moved to the rod chamber direction of oil cylinder (5), until low discharge oil circuit and the tie point of oil cylinder (5) are positioned partially or entirely in oil cylinder
(5) rodless cavity.
A kind of 16. control method of inverter compressor motor cooling structure as claimed in claim 10, it is characterised in that：
According to the flow of frequency-changeable compressor, drive valve (4) mobile by the second motor (9), to adjust the stream of bypass flow channel (3)
Logical area；
The flow increase of frequency-changeable compressor, the opening degree increase of the second motor (9) driving valve (4), the stream of bypass flow channel (3)
Logical area increase；
The flow of frequency-changeable compressor is reduced, and the opening degree of the second motor (9) driving valve (4) reduces, the stream of bypass flow channel (3)
Logical area is reduced.
17. the control method of inverter compressor motor cooling structure as claimed in claim 16, it is characterised in that：According to frequency conversion
The rotating speed of compressor and flow positive correlation, the rotating speed of frequency-changeable compressor is big, corresponds to by the second motor (9) control valve (4)
Opening degree is big；The rotating speed of frequency-changeable compressor is small, corresponding small by the opening degree of the second motor (9) control valve (4).
18. the control method of inverter compressor motor cooling structure as claimed in claim 17, it is characterised in that：In frequency conversion pressure
Under any rotating speed of contracting machine, according to frequency-changeable compressor rotating speed and the relation curve of optimum valve aperture, it is corresponding to find the rotating speed
Optimum valve aperture, control valve (4) are located at the position of optimal aperture.
19. the control method of inverter compressor motor cooling structure as claimed in claim 18, it is characterised in that frequency conversion is compressed
The acquisition of machine rotating speed and the relation curve of optimum valve aperture：Under each rotating speed of frequency-changeable compressor, pass through the second motor
(9) opening degree of constantly regulate valve (4), while the efficiency of frequency-changeable compressor and the temperature of the first motor of detection (1) are tested,
Until the efficiency highest of frequency-changeable compressor, while the temperature of the first motor (1) is in preset range, record frequency-changeable compressor exists
Corresponding valve opening under the rotating speed, draws frequency-changeable compressor rotating speed and the relation curve of optimum valve aperture.
A kind of 20. frequency-changeable compressor, it is characterised in that：Including such as claim 1~10 any one of them frequency-changeable compressor electricity
Machine cooling structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2017104560932 | 2017-06-16 | ||
| CN201710456093.2A CN107100849A (en) | 2017-06-16 | 2017-06-16 | Inverter compressor motor cooling structure, control method and frequency-changeable compressor |
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| CN201710456093.2A Pending CN107100849A (en) | 2017-06-16 | 2017-06-16 | Inverter compressor motor cooling structure, control method and frequency-changeable compressor |
| CN201711391642.9A Pending CN107947471A (en) | 2017-06-16 | 2017-12-21 | Inverter compressor motor cooling structure, control method and frequency-changeable compressor |
| CN201721801456.3U Active CN207573186U (en) | 2017-06-16 | 2017-12-21 | Inverter compressor motor cooling structure and frequency-changeable compressor |
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| CN107100849A (en) * | 2017-06-16 | 2017-08-29 | 珠海格力电器股份有限公司 | Inverter compressor motor cooling structure, control method and frequency-changeable compressor |
| CN114607605B (en) * | 2022-03-28 | 2024-01-05 | 安徽金日晟矿业有限责任公司 | Double-screw air compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247062A (en) * | 1995-03-15 | 1996-09-24 | Toshiba Corp | Rotary compressor |
| JPH11351168A (en) * | 1998-06-05 | 1999-12-21 | Kobe Steel Ltd | Screw type refrigerating device |
| CN101158352A (en) * | 2007-11-09 | 2008-04-09 | 美的集团有限公司 | Shell low-pressure rotary compressor and control mode and application of refrigerant and oil return thereof |
| CN101315077A (en) * | 2007-05-30 | 2008-12-03 | 株式会社神户制钢所 | Operation method of oil-cooled type screw compressor |
| CN204592494U (en) * | 2015-03-26 | 2015-08-26 | 上海浩祯自动化技术股份有限公司 | Flow control valve |
| CN107100849A (en) * | 2017-06-16 | 2017-08-29 | 珠海格力电器股份有限公司 | Inverter compressor motor cooling structure, control method and frequency-changeable compressor |
-
2017
- 2017-06-16 CN CN201710456093.2A patent/CN107100849A/en active Pending
- 2017-12-21 CN CN201711391642.9A patent/CN107947471A/en active Pending
- 2017-12-21 CN CN201721801456.3U patent/CN207573186U/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08247062A (en) * | 1995-03-15 | 1996-09-24 | Toshiba Corp | Rotary compressor |
| JPH11351168A (en) * | 1998-06-05 | 1999-12-21 | Kobe Steel Ltd | Screw type refrigerating device |
| CN101315077A (en) * | 2007-05-30 | 2008-12-03 | 株式会社神户制钢所 | Operation method of oil-cooled type screw compressor |
| CN101158352A (en) * | 2007-11-09 | 2008-04-09 | 美的集团有限公司 | Shell low-pressure rotary compressor and control mode and application of refrigerant and oil return thereof |
| CN204592494U (en) * | 2015-03-26 | 2015-08-26 | 上海浩祯自动化技术股份有限公司 | Flow control valve |
| CN107100849A (en) * | 2017-06-16 | 2017-08-29 | 珠海格力电器股份有限公司 | Inverter compressor motor cooling structure, control method and frequency-changeable compressor |
| CN207573186U (en) * | 2017-06-16 | 2018-07-03 | 珠海格力电器股份有限公司 | Inverter compressor motor cooling structure and frequency-changeable compressor |
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|---|---|
| CN207573186U (en) | 2018-07-03 |
| CN107100849A (en) | 2017-08-29 |
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